Wireless communication terminal and communication method

FIELD: radio engineering, communication.

SUBSTANCE: wireless communication terminal according to the invention is a wireless communication terminal designed for connection with a base station for transmitting and receiving data to/from the base station, said terminal including: a receiver which receives a signal containing control information provided to measure channel quality in a native cell from the base station; an extraction module which extracts control information from the signal received by the receiver; a measurement unit which measures, based on the control information, channel quality in the native cell, in a region where an adjacent cell does not transmit a signal; and a transmitter which transmits the result of measuring channel quality in the native cell by the measurement unit to the base station.

EFFECT: accurate measurement of channel quality in a native cell in conditions without crosstalk from an adjacent cell.

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The technical FIELD TO WHICH the INVENTION RELATES.

The present invention relates to a wireless terminal and communication method designed to transmit and receive data to and from the base station.

The LEVEL of TECHNOLOGY

03GPP (partnership Project 3rd generation), which is an international group for standardization of mobile communications, began the standardization of LTE-Advanced (Project best long-term development, LTE-A) mobile communication system of the fourth generation. As in non-Patent Literature 1, in LTE-A study of technology relay, which relay signals using a relay host, with the aim of expanding the service area and improve throughput.

Consider now Fig.20, with reference to which will be described technology relay. In Fig.20 shows a diagram representing a wireless communication system, in which relay signals using the technology of the relay. In Fig.20, eNB is a base station, RN (PN) is the relay node and the UE (OP, user equipment) is a wireless terminal. In addition, UE1 is a wireless terminal connected to the eNB, and UE2 is a wireless terminal connected to the RN.

In accordance with the LTE-A study that RN has a separate ID cell, to the to and eNB, and thus, if we consider from the point of view of the UE, the RN can be considered as a single cell, such as eNB. eNB is connected to the network using cable data transfer, while the RN is connected to eNB in a wireless communication channel. The communication channel between RN and eNB is called the reverse channel. On the other hand, the communication channel between the eNB or RN and the UE is called channel access.

The top-down communication channel, for example, as shown in Fig.20, RN receives signals from the eNB on the backward channel (arrow a in the drawing) and transmits signals in UE2 channel access RN (arrow B in the drawing). When the reverse channel and the access channel allocated in the same frequency bandwidth, if the RN performs the transmission and reception simultaneously, there are mutual interference due to feedback. For this reason, the RN is unable to perform transmission and reception simultaneously. Therefore, in LTE-A examine the way relaying, in which the backward channel and the access channel RN allocate divided into the time domain (in units of podkatov).

With reference to Fig.21 will be described in the above way relay. In Fig.21 shows a diagram representing the structure podagra downward communication channel to the way the relay. The non-reference position [n, n+1...] the drawing shows a non podagra, and rectangles in the drawing represent podckaji in downlink communication. In addition to t the th, below podckaji transmission eNB (cross-hatched part in the drawing), podckaji reception UE1 (white parts in the drawing), podckaji transfer RN (part shaded to the right in the drawing) and podckaji reception UE2 (part shaded to the left in the drawing).

As shown by the arrows (thick line) in Fig.21, the transmit signals from the eNB in all pocketrak [n, n+1, n+6]. In addition, as shown by arrows (thick line) or arrows (dotted lines) in Fig.21, UE1 made with the possibility of receiving all pocketrak. On the other hand, as shown by arrows (dotted lines) or arrows (thin line) in Fig.21, in RN transmit signals in podkraj, except for the rooms [n+2, n+6] podkatov. In addition, as shown by arrows (thin line) in Fig.21, UE2 is configured to receive signals podkraj, except podkatov numbers [n+2, n+6]. And RN receives signals from the eNB in podkraj numbers [n+2, n+6] podkatov. Thus, in RN podckaji numbers [n+2, n+6] podkatov used as the return channel, and other podckaji used as the channel access RN.

However, if the RN does not transmit the signal from the eNB in podkraj [n+2, n+6], in which RN is used in the reverse channel, the problem arises, namely that the operation of measurements designed to measure the quality of RN, does not function in the wireless terminal LTE, which does not have the information about the presence of RN. As a way to solve this problem, in LTE-A, considering using podagra MBSFN (MSPAS, multicast broadcast Single frequency network)defined in LTE.

Podcat MBSFN is podcat prepared for implementation of MBMS services (MSUM, multimedia broadcast and multicast service transmission) in the future. Podcat MBSFN is designed to transmit control information that is specific to honeycomb, the first two symbols, and transmits the signals for MBMS in the areas of the third and subsequent symbols. As a result, the wireless terminal LTE allow measurements by using the first two characters in potcake MBSFN.

Podcat MBSFN can be used fictitiously cells in RN. Thus, in a cell of RN, the first two characters podagra MBSFN transmit the management information specific to honeycomb RN, and in areas of the third and subsequent symbols, signals from eNB accept without regard for MBMS. Therefore, in the honeycomb RN, podcat MBSFN can be used as podcat reception in the reverse channel. Below podcat MBSFN fictitiously used in a cell of RN, as described above, will be called "podagra MBSFN that RN uses the reverse channel.

Here in podkraj [n+2, n+6] RN in Fig.21, since the signal is not passed from RN to UE1, eliminated interference from RN, so education is, that SIR (ratio of signal power to the power of mutual interference) is improved. eNB positively selects the UE, where the value of the SIR is improved in podkraj [n+2, n+6], in such a way that improves the throughput for a user in the UE, and this improves the throughput of all cells. Therefore, to maximize the throughput of all cells, eNB needs to know the quality of the channel in the UE.

References

Non-PATENT LITERATURE

Non-patent literature 1: 3GPP TR36.814 v0.4.1 (2009-02) "Further Advancements for E-UTRA Physical Layer Aspects (Release 9)"

Non-patent literature 2: 3GPP TS36.213 v8.5.0 (2008-12) "Physical layer procedures (Release 2 8)"

The INVENTION

TECHNICAL TASK

However, when the CQI measurement in LTE, if you are experiencing interference from RN in the resource, where the measured CQI, UE1, managed eNB may not accurately measure the CQI in the case, when there occurs mutual interference from RN.

Here CQI (KIC, the quality indicator channel) represents the quality of the receiving channel, when it is viewed from the side of the reception. CQI transmit the channel feedback from the receiving side of the transmission, and in accordance with the CQI received from the feedback channel, the transmitter selects a modulation method and the encoding rate of the signal intended for transmission to the receiving side.

The purpose of the present invention is to provide a terminal for wireless communication and the way of light and, made with the ability to accurately measure the quality of a channel in its own cell, under conditions when there is no mutual interference from neighboring cells.

The SOLUTION of the PROBLEM

The wireless terminal in accordance with an aspect of the invention is a wireless terminal, which is intended for connection with the base station to transmit and receive data to and from the base station and the wireless terminal includes: a receiver, which is designed with the ability to receive a signal that includes the management information is provided for measuring quality of a channel in its own cell of the base station; an extraction module, which is configured to extract the control information from the signal received by the receiver; a measurement unit that is configured to, based on information management, quality measurement channel in its own cell in the area where the neighboring cell does not transmit the signal; and a transmitter that is configured to transmit the measurement result of the channel quality in its own cell, as measured by the measurement unit, to the base station.

In the terminal wireless communication unit of measurements made with the possibility, on the basis of information management, quality measurement channel in its own cell, in the area where the relay node, specify the second neighboring cell, not transmitting a signal.

In the terminal wireless communication unit of measurements made with the possibility, on the basis of information management, quality measurement channel in its own cell, in potcake MBSFN that the relay node indicating the neighboring cell uses as a back channel.

In the terminal wireless communication unit of measurements made with the possibility, on the basis of information management, quality measurement channel in its own cell in the area of third and subsequent symbols except the first two characters in potcake MBSFN that the relay node indicating the neighboring cell uses as a back channel.

In the terminal wireless communication unit of measurements made with the possibility, on the basis of management information, to measure multiple values as a channel in its own cell, in the area where the neighboring cell does not transmit the signal, and averaging this value set is the quality of the channel.

The wireless terminal additionally includes a detector configured to detect the quality of the channel with the highest quality of the own cell among the values of the channel quality in its own cell, measured by the unit of measurement.

In the terminal wireless communication unit of measurements made with the possibility, on the basis of information management, quality measurement channel in its own cell in the region and third and subsequent symbols, except the first two characters in potcake MBSFN that many relay nodes indicating the neighboring cell uses, as the return channel, and a detector configured to detect the highest quality channel of the own cell among the values of the channel quality in its own cell, measured by the unit of measurement.

The PREFERRED EFFECTS of the INVENTION

In accordance with the wireless terminal and a communication method, in accordance with aspects of the present invention as a channel in its own cell, provided that there is no interference from neighboring cells can be accurately measured.

BRIEF DESCRIPTION of DRAWINGS

In Fig.1 shows a diagram representing a wireless communication system, which transmits radio signals using technology transfer in the embodiment of the present invention.

In Fig.2 shows a diagram representing the "podcat MBSFN that RN uses as the reverse channel in the present embodiment.

In Fig.3 shows a diagram representing podcat, where UE under the control of eNB measures the CQI in the present embodiment.

In Fig.4 shows a diagram representing an example of podkatov downlink communication in the present embodiment.

In Fig.5 shows a diagram representing another example of podkatov in the channel change the channel of communication in the present embodiment.

In Fig.6 shows a block diagram representing the configuration of the wireless terminal 300A in accordance with this variant of execution.

In Fig.7 shows a block diagram representing the configuration of the base station 100 in accordance with this variant of execution.

In Fig.8 shows a block diagram of a sequence of processing operations CQI measurement in the wireless terminal 300A in accordance with the present invention.

In Fig.9 shows a diagram representing a wireless communication system, which performs retransmission of radio signals using the relay in the first modification in accordance with this variant of execution.

In Fig.10 shows a diagram representing podckaji in a downward communication channel to the first modification.

In Fig.11 shows a block diagram representing the configuration of the terminal 600 wireless in the first modification.

In Fig.12 shows a block diagram representing the configuration of the base station 400 in the first modification.

In Fig.13 shows a diagram representing the flow of CQI measurement in the terminal 600 wireless in the first modification.

In Fig.14 shows a diagram representing a wireless communication system, which transmits the radio signal transmission gear, using technology relay in the second modification.

In Fig.Moksana scheme, representing example characters podagra in a downward communication channel to the second modification.

In Fig.16 shows a diagram representing another example of characters podagra in a downward communication channel to the second modification.

In Fig.17 shows a block diagram representing the configuration of the terminal 900 wireless in the second modification.

In Fig.18 shows a block diagram representing the configuration of the base station 700 to the second modification.

In Fig.19 shows a diagram representing the flow CQI measurement in the terminal 900 wireless in the second modification.

In Fig.20 shows a diagram representing a wireless communication system, which performs retransmission of radio signals, using the technology of the relay.

In Fig.21 shows a diagram representing the structure podagra downlink communication method of a relay.

DETAILED description of the INVENTION

In Fig.1 shows a diagram representing a wireless communication system, which performs retransmission of radio signals, using the technology of the relay in the embodiment of the present invention. In the present embodiment, and Fig.1, eNB represents the base station 100, RN represents the node 200 relay, UE1 represent the terminal 300A wireless and UE2 is terminal 300B wireless. Terminal 300A (UE1) the wireless connection is a wireless terminal, connected with the base station 100 and terminal 300B (UE2) wireless communication is a wireless terminal connected to the node 200 relay (RN). Terminal 300A (UE1) wireless communication is a terminal (UE) of a wireless communication under management of the base station 100. The node 200 relay (RN) is a relay node connected to the base station 100.

Here it is assumed that the node 200 relay (RN) has a unique ID cell studied in LTE-A. Therefore, node 200 relay (RN), located next to the terminal 300A wireless, can be viewed as a neighboring cell, from the point of view of the terminal 300A wireless connection.

Below, the purpose of explanation, the base station 100 is called eNB; node 200 relay - RN; terminal 300A (UE1) wireless - UE1; and terminal 300B wireless - UE2.

In addition, below, in the present embodiment, will be described a case in which the retransmission of radio signals perform, as shown in Fig.1. Thus, the RN receives signals from the eNB on the backward channel (arrow C in the drawing) and transmits signals in UE2 channel access RN (arrow D in the drawing). Way relay perform in such a way that the reverse channel and the access channel isolated in the same frequency band, and a reverse channel, and the channel access RN allocate divided by temporary areas in units of podkatov).

With reference to Fig.2-4 will be described a method for UE1 under the control of eNB, for measuring the CQI related to the channel (the channel of the own cell) from eNB to UE1, in the absence of mutual interference from RN, in the embodiment of the present invention. In particular, UE1 under the control of eNB measures the CQI related to the channel (the channel of the own cell) from eNB to UE1, using the signal in the specified area, "potcake MBSFN that RN uses as the reverse channel.

Here, in the present embodiment, "podcat MBSFN that RN uses as the reverse channel"means podcat MBSFN, where in a cell of RN, the management information specific to honeycomb RN, passed in the first two characters podagra MBSFN, and the signals from the eNB take without regard MBMS in the areas of the third and subsequent symbols.

First, UE1 under the control of eNB, the value of the mutual interference of the signals transmitted from the eNB, is changed in accordance with the presence or absence of signals from the RN. For this reason, the reception SIR of the signals transmitted from the eNB, improving in areas where the signal is not passed from RN. When using the "podcat MBSFN that RN uses as the reverse channel, from the point of view podagra and from the point of view of the character can be identified in areas where the signal is not passed from RN.

First, from the point of view podagra, will be described the reason UE1 under the control of eNB can identify about the region, where the signal is not passed from RN "podagra MBSFN that RN uses as the reverse channel.

When using "podcat MBSFN that RN uses as the reverse channel, the amount of interference varies in units of podkatov. In LTE podcat MBSFN emit in a predetermined position, and he can be individually set for each cell. Position allocation podagra MBSFN, which eNB or RN notifies the UE, transmitting the system information in SIB2 (Block 2 system information), does not change instantly, in contrast to the user's selection, but varies over a relatively long period of time. For this reason, even when the RN uses podcat MBSFN as a reverse channel, the position podagra MBSFN individually set for each cell (RN). Thus, if you identify podcat MBSFN used as a back channel adjacent RN, even UE1 under the control of eNB can identify that podcat is podcat, where there are minor interference from RN.

Then, with reference to Fig.2, from the point of view character, will be described the reason why UE1 under the control of eNB may identify areas where the signal is not passed from RN, "podagra MBSFN that RN uses as the reverse channel. In Fig.2 shows a diagram representing the "podcat MBSFN that RN uses as the reverse channel.

As shown in Fig.2, "connecting the Dreux MBSFN, that RN uses as the reverse channel, the first two characters of the RN transmits signals, such as specific cell information management, and in the third and subsequent symbols, RN performs the switching from transmission to reception and receives signals from the eNB.

From the point of view UE1 under the control of eNB, potcake MBSFN shown in Fig.2, although the first two characters look like mutual interference, the interference is absent in areas of the third and subsequent symbols. Thus, the amount of interference varies between areas of the first two characters and areas of the third and subsequent symbols. Therefore, if "podcat MBSFN that RN uses as the reverse channel, identify in relation to neighbouring RN, even UE1 under the control of eNB can identify the symbol, where there are small mutual interference from RN in potcake MBSFN.

In addition, since LTE is based on the premise that neighboring cells are not synchronized with each other, there are cases where the temporal characteristics of podkatov not overlap between adjacent cells. For this reason, even if there is podcat, not migrating in the neighboring cell, it looks like the part with mutual interference and without mutual interference for podagra own cell. In addition, to identify the position of the symbol signals in the neighboring cell, it is necessary both is that synchronization podagra with the neighboring cell. However, between eNB and RN connected with eNB, it is necessary to podcat reverse channel transmitted from the eNB and podcat MBSFN that RN uses as the reverse channel, synchronized with each other. Therefore, between eNB and RN connected with eNB, it is necessary to podcat reverse channel transmitted from the eNB, and podcat MBSFN that RN uses as the reverse channel, synchronized with each other, at least in units of podkatov.

Therefore, even if the RN is connected to the eNB, is a neighboring cell, UE1, coupled with eNB, you can say, essentially, is synchronized in units of podkatov, although there is a time delay of approximately the delay time in the propagation of radio waves. Therefore, podcat eNB, which is a "podcat MBSFN that RN uses as the reverse channel is podcat MBSFN that RN uses as the reverse channel during all podagra.

Given the above two points of view, in the present embodiment, eNB notifies UE1, under his own control, the position podagra MBSFN that RN uses as the reverse channel", and "potcake MBSFN that RN uses as the reverse channel", UE1 under the control of eNB measures the CQI related to the channel (the channel of the own cell) from eNB to UE1, using signals in areas of the third and the next character.

First, the eNB notifies the UE1, under his own control, the position podagra MBSFN that RN uses as the reverse channel in RN, is connected to the eNB. The notification method includes the manner in which the notice provides, using system information (system information block), the management information at a higher level and so on

Next, with reference to Fig.3, will be described podcat in which UE1 under the control of eNB measures the CQI related to the channel (the channel of its own cell) from eNB to UE1. In Fig.3 shows a diagram representing podcat in which UE1 under the control of eNB measures the CQI related to the channel (the channel of the own cell) from eNB to UE1 in the present invention.

As shown in Fig.3, UE1 under the control of eNB is switched to the measurement mode CQI, where the CQI related to the channel (the channel of its own cell) from eNB to UE1, measured using the third and subsequent symbols except the first two characters in potcake shown in Fig.3. In podagra, which is a "podcat MBSFN that RN uses as the reverse channel", UE1 under the control of eNB measures the CQI related to the channel (the channel of its own cell) from eNB to UE in the measurement mode CQI described with reference to Fig.3.

Then, as shown in Fig.4, among podkatov downward communication channel in the present embodiment, in podkraj [n+2, n+], which represent "podckaji MBSFN that RN uses as the reverse channel", UE1 under the control of eNB measures the CQI related to the channel (the channel of the own cell) from eNB to UE, in the above-described CQI measurement mode.

As described with reference to Fig.1-4, in this embodiment, eNB notifies UE1 under his own control of the situation "podagra MBSFN that RN uses as the reverse channel", and "potcake MBSFN that RN uses as the reverse channel", UE1 under the control of eNB measures the CQI related to the channel (the channel of its own cell) from eNB to UE, using signals in areas of the third and subsequent symbols, resulting CQI can be accurately measured in the absence of interference from RN.

Next, with reference to Fig.6, will be described the configuration of the terminal 300A wireless, which is a UE1 under the control of eNB. In Fig.6 shows a block diagram representing the configuration of the terminal 300A wireless communication in accordance with the present embodiment. Terminal 300A wireless, shown in Fig.6, includes an antenna 301, a switch (SW) 303, RF (RF, RF) unit 305, processor 307 reception module 309 extraction signal measuring CQI, block 317 receiving control information, the controller 319 measuring CQI, block 311 information RN, the controller 313 signal retrieval module 315 extraction podagra, module 321 extract symbol, block 323 measuring CQI, block 325 storage device CQI generator 327 feedback information, the processor 329 transmission and RF block 331 transfer.

For signals received by the antenna 301, the RF unit 305 performs reception processing filter to remove signals, except for bandwidth connection, performs frequency conversion bandwidth of the IF (intermediate frequency or baseband frequency, and outputs the resulting signals to the processor 307 reception.

The processor 307 performs reception processing of the reception signals outputted from the RF unit 305 reception. The processor 307 divides the data reception, the reference signal, information management, and information related to RN, which are multiplexed in the received signals, and outputs them. In particular, the processor 307 converts the reception analog signals into digital signals using A/D Converter, etc., and performs demodulation processing, decoding processing, etc.

Module 309 extract the signal measurement extracts the CQI signal for CQI measurement in the received signals, and these signals are shared by the processor 307, and outputs them to the module 315 extraction podagra. The signal used for measuring the CQI represents, for example, the reference signal when the measured desired component of the signal. In addition, the signal used for the measurements CQI, represents, for example, the data signal when the measured mutual interference component.

Block 317 information management receives information management, separated by a processor 307 reception, the management information for the terminal 300A wireless communication, and outputs the management information pertaining to the CQI measurement, for terminal 300A wireless communication, the controller 319 CQI measurement.

The controller 319 measuring CQI outputs the instruction to the controller 313 extraction signal so that the way of measuring CQI control based on the control information pertaining to the CQI measurement for the terminal 300A wireless communication, and the information output from block 317 information management. Ways of measuring CQI, which are controlled by the controller 319 measuring CQI, is a way of measuring CQI used for "podagra MBSFN that RN uses as the reverse channel, and this method of measurement has been described with reference to Fig.3 and 4, and the normal way of measuring CQI. The controller 319 CQI measurement determines which methods of CQI measurements to use on the basis of control information pertaining to the CQI measurement, the output from block 317 information management, and provides instruction in respect of the determination to the controller 313 signal retrieval.

Block 311 information RN received the t information, related to RN, separated by a processor 307, and outputs it to the controller 313 of the extraction signal. Information related to RN, includes position podagra MBSFN that RN uses as the reverse channel. Here, information related to RN, represents information related to RN connected to eNB.

Based on instructions from the controller 319 measuring CQI, the controller 313 extraction signal outputs the instruction in the module 315 extraction podagra and module 321 extract character by using information related to RN, the output from block 311 information RN. When receiving instructions from the controller 319 CQI measurement on the measurement of the CQI related to the channel (the channel of the own cell) from eNB to UE, using the way of measuring CQI for "podagra MBSFN that RN uses as the reverse channel, the controller 313 extraction signal instructs the module 315 extraction podagra extract podcat MBSFN that RN uses as the reverse channel, the output from block 311 information RN, and additionally transmits the instructions in module 321 extract character by removing areas of the third and subsequent symbols except the first two characters in "potcake MBSFN that RN uses as the reverse channel. In addition, when receiving instructions from the controller 319 measuring CQI, to perform the normal way of measuring QI, the controller 313 extraction signal transmits instructions to the module 315 extraction podagra to output all podkatov and transmitting module 321 extract the symbol for instructions on removing the areas of all the characters.

Based on instructions from the controller 313 signal retrieval module 315 extraction podagra extracts the signal used for measuring CQI, the extracted module 309 extract the signal of the CQI measurement, in units of podkatov, and outputs it to the module 321 extract the symbol.

Module 315 extraction podagra can have the function of buffering the signal used for measuring CQI, a dedicated module 309 extract the signal of the CQI measurements. In addition, the module 315 extraction podagra can extract the signal in units of podkatov from the signal stored in the buffer, based on instructions from the controller 313 of the extracted signal, and outputs it.

Based on instructions from the controller 313 signal retrieval module 321 extract the symbol retrieves, in symbol, the signal for CQI measurement, in units of podkatov extracted module 315 extraction podagra, and outputs it to the block 323 CQI measurement.

Block 323 measurements performs CQI measurement of the CQI related to the channel (the channel of the own cell) from eNB in the UE, using the signal used for measuring CQI, the extracted module 321 of the extracted symbol, and outputs the measured CQI in block 325 : size is inaudio device CQI. For example, if you measure a required component of the signal, to block 323 CQI measurements are available the way in which the channel estimation performed using the reference signal in the received signal, and the received power of the desired signal components measured on the channel estimation. In addition, when measured component interference to block 323 measuring CQI, affordable way in which the accepted power is measured using the data region, and adopted the power required data is subtracted in order, therefore, to measure adopted by the capacity component interference. In the latter case, the accessible way in which the adopted power required data is obtained from the received power of the desired component of the signal, described above.

In block 325 storage device CQI stores the CQI measured in it block 323 CQI measurement, and outputs it to the generator 327 feedback information.

Generator 327 feedback information, generates information for transmission over the feedback channel to the base station 100 using CQI stored in block 325 storage device CQI, and outputs it to the processor 329 transfer.

The processor 329 performs transmission processing for transmission of feedback information generated by the generator 327 feedback information so that it can be piped education is Noah communication base station 100, and outputs this information to the RF unit 331 transmission. Examples of processing the transfer include multiplexing of signals, such as data transmission and feedback, processing, encoding and modulation processing.

RF unit 331 performs transmission frequency conversion in the RF frequency, power amplification and processing of the filter transmission for the transmission signal, which has passed through the transmission processing performed by the processor 329 transmission, and outputs this signal to the antenna 301.

Next, with reference to Fig.7, will be described the configuration of the base station 100. In Fig.7 shows a block diagram representing the configuration of the base station 100 in accordance with the present embodiment. The base station 100 shown in Fig.7, includes a block 113 statement of a method for measuring CQI, the generator 111 of the control information, the multiplexer 109 signal processor 107 of the transmission RF unit 105 of the transmission RF unit 123, the CPU 121 of the reception module 119 retrieve information CQI, block 117 of the storage device CQI and block 115 planning. In addition, the multiplexer 109 signal output reference signal, data transmission and information RN. The reference signal is composed of a known signal between transmission and reception, and its output to the multiplexer 109 signal. The reference signal used for channel estimation for demodulation at the receiving and metering the deposits CQI. Data transfer is data transfer terminals 300A and 300B wireless, and they are taken to the multiplexer 109 signal. Information RN represents information related to the relay node (RN)which is connected with the base station 100, and its output to the multiplexer 109 signal.

Block 113 statement of the method of measurement outputs the CQI to the generator 111 of the information governance statement on management CQI measurement used in the terminal 300A wireless connection.

Block 113 statement of the method of CQI measurements may be provided in the terminal 300A wireless. When the terminal 300A wireless communication provided by block 113 statement of the method of measuring CQI, the terminal 300A wireless communication may determine whether podcat "podagra MBSFN that RN uses as the reverse channel or not, and controls how the CQI measurements. In addition, when the terminal 300A wireless always performs as the CQI measurement in potcake MBSFN that RN uses as the reverse channel and the CQI measurement in normal potcake, and reports the result, the block 113 statement of the method of measurement CQI becomes unnecessary.

Generator 111 of the control information generates the management information relating to the terminal 300A wireless communication, comprising the statement of management CQI measurement, the output of 113 block inst the products of the method of measuring CQI, and outputs it to the multiplexer 109 signal.

The multiplexer 109 signal multiplexes entered the reference signal, the data transmission in the wireless terminal, information of RN and the management information, and outputs the result to the CPU 107 of the transfer. On the basis of schedule information that is output from block 115 planning, described below, multiplexer 109 signal selects the data transmission terminals 300A and 300B wireless communication, and performs multiplexing of the user and performs multiplexing with other signals.

The processor 107 performs transmission processing on the transmission signal multiplexed by the multiplexer 109 signal, and outputs this signal to the RF unit 105 of the transfer. Examples of processing the transfer include the processing of encoding and modulation processing.

RF unit 105 transmission performs frequency conversion on the RF frequency, power amplification and processing filtering in the transmission of the transmission signal, which has passed through the transmission processing by the processor 107 transmission, and outputs this signal to the antenna 101.

For signals received by the antenna, the RF unit 123 performs reception processing filter to remove signals, except for bandwidth connection, performs frequency conversion on the bandwidth IF the frequency or the main bandwidth, and outputs the resulting C is cash in the CPU 121 of the reception.

The CPU 121 performs reception processing of the reception signals outputted from the RF unit 123, and divides the received data, information management, etc. In particular, the processor 121 converts the reception analog signals into digital signals using A/D Converter, etc., and performs demodulation processing, decoding processing, etc.

Module 119 extraction extracts CQI CQI information from the control information separated by the CPU 121, and outputs it to the block 117 of the storage device CQI.

Block 117 of the storage device stores the CQI CQI information, the extracted module 119 extract the CQI information, and displays it in the block 115 planning.

Unit 115 performs planning planning using the CQI information stored in the block storage device 117 CQI, and outputs the scheduling information to the multiplexer 109 signal. When planning unit 115 planning determines podcat transmission and the frequency of transmission block (resource)using the CQI information.

Next, with reference to Fig.8 will be described the processing flow of the CQI measurement in the terminal 300A wireless communication in accordance with the present embodiment. In Fig.8 shows a diagram representing the flow of processing when the CQI measurement in the terminal 300A wireless connection.

On stage (ST001) antenna 301 receives the signal from the eNB and RF unit 305 of the reception, the CPU 307 performs reception processing of the reception.

On stage (ST002) module 309 extract the signal measurement extracts the CQI signal used for measuring CQI, from the signal which has been subjected to the reception processing at step (ST001).

On stage (ST003) unit 317 information management receives the management information of the UE1 under the control of eNB, from the signal which has been subjected to the reception processing at step (ST001).

On stage (ST004) unit 311 information RN receives information related to RN, from the signal which has been subjected to the reception processing at step (ST001).

On stage (ST005) controller 319 measuring CQI selects which of the CQI measurement modes, for "podagra MBSFN that RN uses as the reverse channel and the normal measurement mode CQI, measured CQI, from the control information obtained in step (ST003).

<In the case of CQI measurement mode to "podagra MBSFN that RN uses as the reverse channel">

On stage (ST006-1), the controller 313 extraction signal indicates, for module 315 extraction podagra and module 321 extract symbol, podcat, which is a "podcat MBSFN that RN uses as the reverse channel of information related to RN obtained in step (ST004).

At stage (ST 007-1) module 315 extraction podagra extracts podcat, which is a "podcat MBSFN that RN uses as the reverse channel from the signal used to measure the CQI, extracted in step (ST002) in podagra, which is a "podcat MBSFN that RN uses as the reverse channel specified by the controller 313 signal retrieval phase (ST006-1).

On stage (ST008-1) module 321 extract the symbol extracts the signals of the areas, except the first two characters of the signal podagra, extracted in step (ST 007-1) in podagra, which is a "podcat MBSFN that RN uses as the reverse channel, the notification of which was received from the controller 313 signal retrieval phase (ST006-1).

<In the case of normal measurement mode CQI>

On stage (ST006-2), the controller 313 extraction signal transmits instructions to the module 315 extraction podagra and module 321 retrieve the character to perform the extraction signal in all pocketrak.

At stage (ST 007-2) module 315 extraction podagra retrieves all podckaji signal used for measuring CQI, extracted in step (ST002), in accordance with the instruction from the controller 313 signal retrieval phase (ST006-2).

On stage (ST008-2) module 321 extract the symbol retrieves signals from all areas of the symbols in the signals of all podkatov, extracted in step (ST 007-2), in accordance with the instructions of the controller 313 signal retrieval phase (ST006-2).

On stage (ST009) unit 323 measurements performs CQI CQI measurement using the signals extracted in step (S008-1) or (ST008-2).

On stage (ST010) unit 325 storage device CQI stores the CQI measured at step (ST009).

On stage (ST011) generator 327 feedback information, generates the feedback of the CQI that you saved in step (ST010).

On stage (ST012) processor 329 transmission and RF block 331 transfer process transfer for feedback information generated at step (ST011), and pass the result in the eNB.

Although in the present embodiment, UE1 under the control of eNB measures the CQI using the third and subsequent symbols except the first two characters in podagra, which is a "podcat MBSFN that RN uses as the reverse channel, the present invention is not limited to this podagra. For example, all podkraj, as in the present embodiment, UE1 under the control of eNB can measure the CQI related to the channel (the channel of the own cell) from eNB to UE1 using the third and subsequent symbols except the first two characters. Thus, although the accuracy of CQI several degrades, because the first two characters cannot be used for CQI measurement in podkraj that RN uses as the reverse channel, the amount of overhead in the transmission of signals can be reduced, since there is no need for eNB to notify information related to podagra MBSFN used as clicks the private channel adjacent RN, etc.

In the present embodiment, in potcake MBSFN that RN uses as the reverse channel", in potcake eNB, the transmit power of the reference signal can be increased. In measurement mode CQI UE1 under the control of eNB in the present embodiment, since the first two characters cannot be used for measuring CQI, by increasing the capacity of, respectively, the measurement accuracy of CQI can be supported. In this case, the eNB notifies UE1 under the control of eNB, how was increased transmit power. In addition, the CQI measurement for the reference signal may be inserted into a portion of the data regions of the third and subsequent symbols. Since the first two characters cannot be used for measuring CQI, by inserting a reference signal corresponding to them, the measurement accuracy of CQI can be supported. In this case, the eNB notifies UE1 under the control of eNB that the reference signal has been inserted for measuring CQI.

In the present embodiment, in the case of periodic CQI, when the fourth podcat before podagra, where CQI was given as feedback, not a "podagra MBSFN that RN uses as the reverse channel", UE1 under the control of eNB can measure CQI in the CQI measurement mode in "potcake MBSFN that RN uses as the reverse channel, which is before the fourth podagra and is the nearest.

With SS is the left main coronary artery of Fig.5, will be described an example in which UE1 under the control of eNB measures the CQI related to the channel (the channel of the own cell) from eNB to UE1 in "potcake MBSFN that RN uses as the reverse channel, which is located in front of the specified number of podkatov and is the closest. In Fig.5 shows a diagram representing another example of the downward communication channel in the present embodiment, in the case of periodic CQI.

As shown in Fig.5, the periodic CQI report which comes on the upward communication channel podagra [n+8], measure the CQI measured by the downward communication channel podagra [n+4], which is a fourth podcat before podagra [n+8]. However, in this podagra [n+4], since RN is a normal podcat, CQI cannot be measured when measuring CQI in accordance with the present embodiment. Therefore, in podagra [n+2], which is a "podcat MBSFN used as a back channel RN, which is before podagra [n+4] and is the closest to podagra [n+4], UE1 under the control of eNB can measure the CQI related to the channel (the channel of the own cell) from eNB to UE1 in the above-described CQI measurement mode, in accordance with the present embodiment, and notifies the eNB about it for the upward communication channel transmission podagra [n+8].

In the present embodiment, in the case of aperiodic QI, in "potcake MBSFN that RN uses as the reverse channel, notice of which is received from the eNB, when UE1 under the control of eNB receives instructions from the eNB to measure CQI, UE1 under the control of eNB can measure the CQI related to the channel (the channel of its own cell) from eNB to UE1 in the CQI measurement mode, in accordance with the present embodiment. For example, these explanations are similar to the explanations under reference to Fig.5 represent the following.

If the eNB has notified UE1 under the control of eNB on "potcake MBSFN that RN uses as the reverse channel", UE1 under the control of eNB knows the position podagra that "podcat MBSFN uses the reverse channel RN". So, for example, in podagra [n+2], shown in Fig.5, when UE1 under the control of eNB receives the instruction to measure the CQI related to the channel (the channel of the own cell) from eNB to UE1, UE1 under the control of eNB can measure the CQI related to the channel (the channel of its own cell) from eNB to UE1, the CQI measurement mode, in accordance with the present embodiment.

In the present embodiment, in the case of aperiodic CQI, the eNB may transmit instructions to UE1 under the control of eNB in the PDCCH to perform measurements in the measurement mode CQI for "podagra MBSFN that RN uses as the reverse channel. In particular, in the PDCCH format 0, adds the request CQI for "podagra MBSFN used as a back channel RN". The trail is therefore even if the eNB does not notify UE1 under the control of eNB about information related to "podagra MBSFN that RN uses as the reverse channel adjacent RN, UE1 under the control of eNB can measure the CQI related to the channel (the channel of the own cell) from eNB to UE1 in the CQI measurement mode, in accordance with the present embodiment.

In the present embodiment, UE1 under the control of eNB can measure many times CQI related to the channel (the channel of the own cell) from eNB to UE1, measured in "potcake MBSFN that RN uses as the reverse channel, and averaging these values. In particular, the range of performing the measurement component of the signal is limited "podagra MBSFN that RN uses as the reverse channel, and the range in which to perform the measurement component interference will be limited to "podagra MBSFN that RN uses as the reverse channel. Thus, the measurement accuracy of CQI related to the channel (the channel of the own cell) from eNB to UE1, can be improved.

While eNB and RN connected to the eNB, as described in the present embodiment, the present invention can be applied for the case where many eNB is podcat, in which the signal is not passed from one eNB.

While CQI channel from eNB to UE is described as the quality of the channel in its own cell, in the present embodiment, the present invention does not exhaust anchoveta it. For example, can be used as a channel in its own cell, measured when performing transmission to the subscriber.

(First modification)

Next, with reference to Fig.9-13, will be described first modification of this variant implementation. While the case in which the number of RN that is connected to the eNB, is one that is described as an example in the above embodiment, in the first modification of this variant implementation will be described a case in which the set RN is connected to one eNB.

When the set RN is connected to one eNB, there are cases in which the provisions of podkatov MBSFN used as a back channel RN are different. This is due to the fact that the number of podkatov MBSFN used as a back channel is not the same as bandwidth return channel RN differs in different RN. In addition, if the reverse channel set RN to make one podagra, traffic will concentrate sufficient resources cannot be allocated to each RN, and this can lead to reduced efficiency, so that the provisions of podkatov MBSFN used as a back channel in RN, do different.

When the provisions of the "podkatov MBSFN used as a back channel in RN has a different, as noted above, because of the magnitude of interference from RN will be R the EIT, depending on the position of the UE under the control of eNB, values of mutual interference will be different in different pocketrak. Thus, when the position of the UE under the control of eNB close to RN, interference is taken from this RN will be strong, and when it is far from RN, mutual interference received from the RN will be weak. Therefore, for the UE under the control of eNB is preferable to transmit signals in potcake in which mutual interference is weaker.

In Fig.9 shows a diagram representing a wireless communication system, which performs retransmission of radio signals, using the technology of the relay in the first modification of this variant implementation. In the first modification, Fig.9, the eNB represents the base station 400, RN1 represents a node 500A relay RN2 represents a node 500B relay, and UE1 is the terminal 600 wireless. The terminal 600 (UE1) wireless communication is a wireless terminal connected with the base station 400, in other words, the wireless terminal under control of the base station 400. In the first modification, there are two relay node, which are connected to the same base station.

Here it is assumed that the relationship of positions between the terminal 600 wireless node 500A (RN1) relay node 500B (RN2) of the relay is such that the node 500B (RN2) pet is aslali will be in a closer position to the terminal 600 (UE1) wireless than the node 500A (RN1) relay.

In addition, in the wireless communication system according to the first modification of this variant implementation of the method of the relay is designed so that the reverse channel and the access channel are placed in the same frequency band, and the reverse channel and the access channel dedicated RN, being separated in the time domain (in units of podkatov). Below, the purpose of explanation, the base station 400 will be called eNB; node 500A relay - RN1; node 500B relay - RN2; and the terminal 600 wireless communication under management of the base station 400 to UE1.

Here it is assumed that the node 500A (RN1) relay node 500B (RN2) relay have individual ID cell studied in LTE-A. Therefore, node 500 (RN1) relay node 500B relay located next to the terminal 600 wireless communication, can be considered as neighboring cells, from the point of view of the terminal 600 wireless connection.

In Fig.10 will be described podckaji downward communication channel in the wireless communication system shown in Fig.9. In Fig.10 shows a diagram representing podckaji downward communication channel to the first modification. In Fig.10, RN1, the provisions of the "podkatov MBSFN that RN uses as the reverse channel", are podckaji [n+2] and [n+6]. On the other hand, RN2, position podagra MBSFN that RN uses as the reverse channel", presented yet podcat [n+4].

As shown in Fig.10, in podkraj [n, n+1, n+3, n+5], UE1 receives interference, as of RN1 and RN2, as shown by arrows (dotted lines). However, although UE1 receives interference from RN2 and mutual interference of RN1 in podkraj [n+2, n+6] and in podagra [n+4], values of mutual interference of these two RN1 and RN2 are different. Thus, since RN1 is located farther from UE1 than RN2, values of mutual interference, which UE1 receives from RN1, weaker than the magnitude of the mutual interference, which UE1 receives from RN2. Therefore, comparing the values of mutual interference, which UE1 receives from RN1 and RN2, you can see that the values of mutual interference, which UE1 receives from RN, weaker in podagra [n+4], where UE1 receives interference from RN1 than pocketrak [n+2, n+6], where UE1 receives interference from RN2.

Given the above values of mutual interference of RN, which takes UE1, in the first modification of this variant implementation UE1 under the control of eNB notifies the provisions of podkatov MBSFN used as a back channel, all RNs running eNB, and UE1 under the control of eNB detects podcat, where mutual interference is small, and transmits the channel feedback position podagra in eNB, together with the CQI related to the channel (the channel of the own cell) from eNB to UE1. Next will be described a specific method of the first modification, considering the magnitude of the mutual interference from RN to the e UE receives.

First, the eNB notifies UE1 under his own control of the situation "podagra MBSFN that RN uses as the reverse channel", in all RN, is connected to the eNB. The notification method includes a method in which the notification is provided, using the system information (system information block), information management higher level, etc.

Then, as in the present embodiment, UE1 under the control of eNB measures the CQI related to the channel (the channel of the own cell) from eNB to UE1 in the CQI measurement mode described with reference to Fig.3 in podagra, notice of which came from NB. Then UE1 detects podcat in which CQI is high among podkatov specified in the notification, and transmits, as feedback, this CQI and its position in potcake in eNB. For example, in explaining the environment, adopted in Fig.9 and 10, UE1 measures the CQI for "podagra MBSFN that RN uses as the reverse channel in podkraj [n+2, n+4, n+6], detects podcat [n+4], where the magnitude of the interference is small among them, and transmits, as feedback, this value CQI in podagra [n+4] and the number podagra.

As described above, in the first modification of this variant implementation of the eNB notifies UE1 under the control of eNB on the situation "podagra MBSFN that RN uses as the reverse channel" all RN running eNB, and UE1 under the control of eNB detects podcat in which mutual the interference is small, and transmits the feedback position podagra in eNB, together with the CQI related to the channel (the channel of the own cell) from eNB to UE1. Therefore, in the first modification of this variant implementation, UE1 under the control of eNB, CQI related to the channel (the channel of the own cell) from eNB to UE1, can be measured in podagra, where interference from RN less.

With reference to Fig.11, will be described the configuration of the terminal 600 wireless communication, as UE1. In Fig.11 shows a block diagram representing the configuration of the terminal 600 wireless in the first modification. The terminal 600 wireless communication, as shown in Fig.11, differs from the terminal 300A wireless, shown in Fig.6, so that the detector 601 podagra high quality and generator 603 feedback information. Except for this, the configuration similar to those shown in the embodiment, and Fig.11 elements in common with Fig.6, are denoted by the same reference numbers of positions. In addition, the description of common elements is excluded.

The detector 601 podagra high quality detects the CQI with the highest quality among the CQI stored in block 325 storage device CQI. Then the detector 601 podagra high quality measures CQI for "podagra MBSFN that RN uses as the reverse channel using position information "podagra MBSFN that RN, as the reverse channel received by block 311 information RN, detects the position podagra, where CQI is of high quality, and outputs the result of detection (number podagra, and CQI related to the channel [channel of the own cell] from eNB to UE1 in podagra) in the generator 603 feedback information.

Generator 603 feedback information, generates feedback information from the information podagra (number podagra), detektirovanii detector 601 podagra high quality, and CQI related to the channel (the channel of the own cell) from eNB to UE1, potcake stored in block 325 storage device CQI, and outputs it to the processor 329 transfer.

Next, with reference to Fig.12, will be described the configuration of the base station 400, as eNB. In Fig.12 shows a block diagram representing the configuration of the base station 400 in the first modification. The base station 400 shown in Fig.12 differs from the base station 100 shown in Fig.7, so that the block 401 of the storage device CQI/podagra provided instead of block 117 of the storage device CQI. Except for this, the configuration similar to those shown in the embodiment, and Fig.12 the elements that are common with Fig.7, are denoted by the same reference numbers of positions. In addition, the description of these common elements is excluded.

Unit 401 of the storage device CQI/under the Adra stores information podagra, transmitted as feedback from the UE1, and the CQI related to the channel (the channel of the own cell) from eNB to UE1, podagra, and this information and CQI extract module 119 retrieve information CQI and display them in a block 115 planning.

Next, with reference to Fig.13, will be described the processing flow of the CQI measurement in the terminal 600 (UE1) wireless communication in the first modification. In Fig.13 shows a diagram representing the flow of CQI measurement in the terminal 600 wireless in the first modification. Flow measurements CQI in the terminal 600 wireless communication, as shown in Fig.13, differs from the flow measuring CQI in the terminal 300A wireless, shown in Fig.8, so that the processing at the step (ST013) newly added between step (ST010) and step (ST011). Except for this, the processing flow similar to those shown in the embodiment, and Fig.13, the General steps of Fig.8 are denoted by the same reference numbers of positions. In addition, it is the description of the General steps.

On stage (ST013) detector 601 podagra high quality detects podcat with high quality at a CQI that you saved in step (ST010). Then, at step (ST011), generator 603 feedback information, generates the feedback of the CQI that you saved in step (ST010), and information about potcake, detektirovanii on stage (ST013).

While in the first modify the purpose of the present invention, eNB notifies UE1 under his own control of the situation "podagra MBSFN that RN uses as the reverse channel in all of the United RN, the present invention is not limited to this. For example, the eNB notifies UE1 under the control of eNB on the number of each RN in position podagra MBSFN used as the return channel, each RN, the position of which is associated with the number of RN. Then UE1 detects podcat in which CQI is greatest, and detects how RN this podcat used as podagra MBSFN used as a back channel, passing, thus, the feedback position podagra or number RN and the measured CQI value in eNB.

As described above, due to the fact that the eNB notifies UE1 under his own control of the situation "podagra MBSFN that RN uses as the reverse channel, for each RN in order, therefore, to average CQI values measured in podkraj MBSFN used as the return channel, the same RN, the measurement accuracy of CQI can be improved.

(Second modification)

Next, with reference to Fig.14-19, will be described in the second modification of this variant implementation.

In the embodiment and the first modification eNB notifies UE1 on the situation "podagra MBSFN that RN uses as the reverse channel, and UE1 switches the measurement mode CQI on the basis of information received the notification. However, in the second modification of this variant implementation of the UE1 determines whether podcat "podagra MBSFN that RN uses as the reverse channel", or not.

In Fig.14 shows a diagram representing a wireless communication system, which performs retransmission of radio signals, using the technology of the relay in the second modification. In the second modification, Fig.14, eNB represents the base station 700, RN represents a node 800 relay, UE1 is the terminal 900A wireless and UE2 is terminal 900B wireless. Terminal 900A wireless (UE1) is a wireless terminal connected with the base station 700 and the terminal 900B (UE2) wireless communication is a wireless terminal connected to the node 800 (RN) relay. Terminal 900A (UE1) wireless communication is a terminal (UE1) wireless communication under management of the base station 700.

Below, the purpose of explanation, the base station 700 will be called eNB; node 800 relay - RN; and the terminal 900A (UE1) wireless - UE1. In addition, below, in the second modification will be described a case in which the transmit radio signals, as shown in Fig.1. Thus, the RN receives signals from the eNB on the backward channel (arrow E in the drawing) and transmits signals in UE2 channel access RN (arrow F in the drawing). The FPIC of the b relay is designed in such, the reverse channel and the access channel are placed in the same frequency band, and the reverse channel and the access channel dedicated RN, being separated temporal area (in units of podkatov).

Here it is assumed that the node 800 (RN) relay has a separate ID cell studied in LTE-A. Therefore, node 800 (RN) relay located next to the terminal 900A (UE1) wireless communication, can be seen as a neighboring cell, when it is viewed from the point of view of the terminal 900A wireless connection.

With reference to Fig.15 and 16, will be described the way in which UE1 determines whether podcat "podagra MBSFN that RN uses as the reverse channel"or not. In Fig.15 shows an example of characters podagra on downward communication channel to the second modification. In Fig.16 shows another example of characters podagra on downward communication channel to the second modification.

As shown in Fig.15, the signals pass from RN in all the characters. For this reason, the character in this potcake not used for measuring the CQI related to the channel (the channel of the own cell) from eNB to UE1, CQI shows similar values. Thus, the CQI related to the channel (the channel of the own cell) from eNB to UE1, measured using all the characters, and the CQI related to the channel (the channel of the own cell) from eNB to UE1, measured using the third and subsequent symbols have liscie values.

On the other hand, as shown in Fig.16, in the third (character #2) and subsequent symbols, the signal is not passed from RN to eNB. For this reason, in potcake shown in Fig.16, the value of mutual interference, which UE1 receives from RN, differs between the case where the CQI related to the channel (the channel of the own cell) from eNB to UE1, measured included the first two characters, and when the CQI eNB measured using the third and subsequent symbols. Thus, the CQI related to the channel (the channel of the own cell) from eNB to UE1, measured using the third and subsequent characters in potcake shown in Fig.16, and has a value representing a higher quality channel than the CQI related to the channel (the channel of the own cell) from eNB to UE1, measured using the first two characters and the third and subsequent characters in potcake shown in Fig.16. Thus, between the CQI related to the channel (the channel of the own cell) from eNB to UE1, measured using all the characters, and the CQI related to the channel (the channel of the own cell) from eNB to UE1, measured using the third and subsequent symbols, the latter takes the value representing a higher quality channel.

Therefore, by comparing CQI related to the channel (the channel of the own cell) from eNB to UE1, measured using all the characters, and the CQI related to the channel (the channel of the own cell) is C eNB to UE1, measured using the third and subsequent symbols, UE1 may himself determine whether podcat normal podagra or "podagra MBSFN that RN uses as the reverse channel. Furthermore, with the result of comparison of the CQI related to the channel (the channel of the own cell) from eNB to UE1, measured by using only the first two characters, and the CQI related to the channel (the channel of the own cell) from eNB to UE1, measured by using only the third and subsequent symbols, UE1 can similarly determine whether podcat normal podagra or "podagra MBSFN that RN uses as the reverse channel.

As described above, in the second modification of the present case for UE1 compares the CQI related to the channel (the channel of the own cell) from eNB to UE1, measured using the first two characters, and the CQI related to the channel (the channel of the own cell) from eNB to UE1, measured using the third and subsequent symbols, to determine whether podcat RN normal podagra or "podagra MBSFN that RN uses as the reverse channel, and UE1 performs CQI measurement for eNB, suitable for everyone, and passes the result in eNB, as feedback.

Below will be described a specific method for the UE1, determining whether podcat RN normal podagra or "podagra MBSFN that RN uses as the reverse channel"./p>

First, UE1 measures the CQI related to the channel (the channel of the own cell) from eNB to UE1, using all areas of the characters, and then measures the CQI related to the channel (the channel of the own cell) from eNB to UE1 using the third and subsequent symbols. Below, the purpose of explanation, the CQI related to the channel (the channel of the own cell) from eNB to UE1, measured using all areas of the characters will be called CQI_all, and CQI related to the channel (the channel of the own cell) from eNB to UE1, measured using the third and subsequent symbols, CQI_part.

In the present description an underscore "_"following after "CQI"is what letters or words (e.g., all) and part (part)), following the underscore _ are subscripts for "CQI"immediately preceding the underscore _.

Then UE1 compares CQI_all and CQI_part, to determine whether podcat RN normal podagra or "podagra MBSFN that RN uses as the reverse channel. For example, UE1 may determine whether podcat RN normal podagra, or podcar RN is a "podcat MBSFN that RN uses as the reverse channel", by pre-setting the threshold value Th for the absolute value of the difference between CQI_all and CQI_part (below called the differential CQI) and compare the difference between the CQI threshold value Th.

Thus, once the awn CQI less than the threshold value Th, UE1 determines that there is no difference between CQI_all and CQI_part, and determines that podcat RN is a normal podcat. On the other hand, when the difference between the CQI is equal to or larger than the threshold value Th, UE1 determines that there is a difference between CQI_all and CQI_part, and UE1 determines that podcat RN is a "podcat MBSFN that RN uses as the reverse channel.

The condition expressed above by the difference between the CQI and the threshold value Th, expressed by the following expression (l) and expression (2)using CQI_all and CQI_part.

[Expression 1]

[Expression 2]

Thus, when CQI_all, CQI_part and the threshold value Th satisfy the expression (1), UE1 determines that podcat RN is a normal podcat. On the other hand, when CQI_all, CQI_part and the threshold value Th satisfy the expression (2), UE1 determines that podcat RN is a "podcat MBSFN that RN uses as the reverse channel.

Then, in accordance with podagra RN specified IP is by using the expression (l) and expression (2), UE1 selects the method for measuring CQI, for example, as follows.

When UE1 determines that podcat RN is a normal podcat, because the quality is the same among the characters in podagra, the measurement accuracy of CQI can be improved by performing the averaging, using a variety of characters. So UE1 selects the methodmeasure theCQI,usingallthepodagra,andmeasures the CQI related to the channel (the channel of the own cell) from eNB to UE1. On the other hand, when the UE1 determines that podcat RN is a "podcat MBSFN that RN uses as the reverse channel", as in the first modification, UE1 selects the measurement mode CQI using the third and subsequent symbols except the first two characters, and measures the CQI related to the channel (the channel of the own cell) from eNB to UE1.

Then UE1 transmits, as feedback, in which mode was used for measurement, eNB, as feedback information, together with the measured CQI value.

In addition, when comparing the CQI measured using only the first two characters, and CQI measured using only the third and subsequent symbols, for example, is available with the following solution.

When the reference signal is a downward communication channel used for measuring CQI, first, UE1, perform CQI measurement, as metering is of CQI, using the first two characters, by using the reference signal inserted into the symbol #0, and the CQI measurement using the third and subsequent symbols, using the reference signal is inserted in the symbol #7. As a result of measuring CQI presents each of CQI_sym0 and CQI_sym7.

Then, by comparing these values CQI_sym0 and CQI_sym7 determine whether podcat RN normal podagra or "podagra MBSFN that RN uses as the reverse channel. For example, by pre-setting the threshold Th_sym for the absolute value of the difference between CQI_sym0 and CQI_sym7 (below is called the difference CQI_sym) and by comparing the difference CQI_sym threshold value Th_sym, UE1 may determine whether podcat RN normal podagra or "podagra MBSFN that RN uses as the reverse channel.

Thus, when the difference CQI_sym less than the threshold value Th_sym, because there is no difference between CQI_sym0 and CQI_sym7, UE1 determines that the quality is the same among the characters in podagra, and UE1 determines that podcat RN is a normal podcat. On the other hand, when the difference CQI_sym equal to or greater than the threshold value Th_sym, UE1 determines that there is a difference in quality between the first two symbols and the third and subsequent symbols, as is the difference between CQI_sym0 and CQI_sym7, and UE1 determines the t, what podcat RN is a "podcat MBSFN that RN uses as the reverse channel.

The condition expressed above difference CQI_sym and threshold Th_sym, expressed by the following expression (3) and expression (4)using CQI_sym0, CQI_sym7 and Th_sym:

[Expression 3]

[Expression 4]

Thus, when CQI_sym0, CQI_sym7 and Th_sym satisfy the expression (3), UE1 determines that podcat RN is the normal podagra. On the other hand, when CQI_sym0, CQI_sym7 and Th_sym satisfy the expression (4), UE1 determines that podcat RN is a "podcat MBSFN that RN uses as the reverse channel.

Then, in accordance with podagra RN, certain UE1, choose the method of CQI measurements. When podcat RN is a normal podcat, because the quality is the same among the characters in podagra, the measurement accuracy of CQI can be improved by performing the averaging, using a variety of characters, and for this reason UE1 selects a CQI measurement using the CE region podagra, and measures the CQI related to the channel (the channel of the own cell) from eNB to UE1. On the other hand, when podcat RN is a "podcat MBSFN that RN uses as the reverse channel", as in the first modification, UE1 selects a CQI measurement using the third and subsequent symbols except the first two characters, and measures the CQI related to the channel (the channel of the own cell) from eNB to UE1. UE1 transmits, as feedback, in which mode the measurement was performed in the eNB, as feedback information, together with the measured CQI value.

As described above, in the second modification of the present case for UE1 compares the CQI related to the channel (the channel of the own cell) from eNB to UE1, measured by using the first two characters, and the CQI related to the channel (the channel of the own cell) from eNB to UE1, measured by using the third and subsequent symbols. Then, on the basis of the comparison result, UE1 determines whether podcat RN normal podagra or "podagra MBSFN that RN uses as the reverse channel. In addition, based on the result of determination, UE1 performs CQI measurement for eNB, suitable for everyone, and transmits feedback to eNB, mode in which measurement was performed, as feedback information, together with the measured CQI value. Therefore, UE1 under the control of eNB, the can is to be accurately measured CQI, related to the channel (the channel of the own cell) from eNB to UE1, when there is no mutual interference of RN. In addition, for eNB there is no need to notify UE1, providing information related to RN, and compared with this option domestic in the second modification, the number of service signals transmitted through the downward communication channel can be further reduced.

Next, with reference to Fig.17, will be described the configuration of the terminal 900 wireless in the second modification. In Fig.17 shows a block diagram representing the configuration of the terminal 900 wireless in the second modification. Terminal 900 wireless, shown in Fig.17, includes an antenna 301, a switch (SW) 303, RF unit 305, processor 307 reception module 309 extract the signal of the CQI measurement module 901 extract symbol, unit 903A measuring CQI, block 903B measuring CQI, the determiner 905 podagra, block 907 storage device CQI generator 909 feedback information, the processor 329 transmission and RF block 331 transfer.

Terminal 900 wireless, shown in Fig.17 differs from the terminal 300A wireless, shown in Fig.6, extrateam 901 symbol, unit 903A CQI measurement, unit 903B measuring CQI, identifier 905 podagra, block 907 storage device CQI and generator 909 feedback information. Except this is th, the configuration similar to those shown in the embodiment, and Fig.17 elements in common with Fig.6 denoted by the same numbers of reference positions. In addition, the description of common elements is excluded.

Module 901 extract the symbol retrieves the signal regions of the third and subsequent symbols except the first two characters of the signals used for measuring CQI, and these signals extracted from module 309 extract the CQI signal and display them in the unit 903A CQI measurement.

Unit 903A CQI measurement inputs the signals used for the CQI measurement areas of the third and subsequent symbols, in which the signal is extracted using a module 901 extract symbol, measures the CQI when podcat is a "podcat MBSFN that RN uses as the reverse channel", as in the embodiment, and outputs the measured CQI values in the identifier 905 podagra.

Block 903B CQI measurement inputs the signals used for measuring CQI, performs CQI measurement using all the characters, and displays the measured CQI to the determinant 905 podagra.

Identifier 905 podagra compares the CQI measured by the unit 903A of the CQI measurement unit and 903B CQI measurement, and determines whether podcat RN normal podagra or "podagra MBSFN that RN uses as the reverse channel. Then the determinant 905 podagra outputs the CQI in block 907 storage device CQI together with the definition.

When the determiner 905 podagra determines that podcat RN is a normal podcat, the CQI measurement result from the block 903B CQI measurement output in block 907 storage device CQI. On the other hand, when the determiner 905 podagra determines that podcat RN is a "podcat MBSFN that RN uses as the reverse channel, the CQI measurement result of the unit 903A CQI measurement output in block 907 storage device CQI.

Block 907 storage device stores the CQI CQI value of the determinant 905 podagra, and the result of the determination podagra RN, and outputs them to the generator 909 feedback information.

Generator 909 feedback information, generates feedback information, is used to feed back to the base station 700, using the CQI and the definition podagra RN stored in block 907 storage device CQI, and outputs it to the processor 329 transfer.

Next, with reference to Fig.18, will be described the configuration of the base station 700. In Fig.18 shows a block diagram representing the configuration of the base station 700 to the second modification. The base station 700, shown in Fig.18 differs from the base station 100 shown in Fig.7, instead of the module 119 retrieve information CQI and block storage device 117 CQI present module 701 retrieve information CQI/R is the result of the determination and the block storage device 703 CQI/of the definition and that the block 113 information RN and instructions how CQI measurement is missing. Except for this, the configuration similar to those shown in the embodiment, and Fig.18 elements in common with Fig.7, are denoted by the same reference numbers of positions. In addition, the description of common elements is excluded.

Module 701 retrieve information CQI/the definition retrieves information about potcake transmitted as feedback from terminal 900 wireless and CQI in podagra, from the control information separated by the CPU 121, and displays them in a block storage device 703 CQI/of the definition.

Block 703 storage device CQI/the definition stores information podagra transmitted as feedback from terminal 900 wireless, and CQI in potcake and displays them in a block 115 planning.

Next, with reference to Fig.19, will be described the processing flow measuring CQI of the terminal 900 (UE1) wireless communication in the second modification. In Fig.19 shows a diagram representing the flow measuring CQI of the terminal 900 wireless in the second modification.

On stage (ST101) antenna 301 receives the signal from the eNB, and the RF unit 305, and the processor 307 perform reception processing of the reception.

On stage (ST102), the module 309 extract extracts the signal used for measuring CQI, from the signal which has been subjected to the reception processing at step (ST101).

On stage (ST103), the module 901 izvlecheny the symbol retrieves the character areas, except for the first two characters, the signal used for measuring CQI, extracted in step (ST102).

On stage (ST104-1) unit 903A measurements performs CQI CQI measurement using the signal extracted in step (ST103). The result of the CQI measurement unit 903A CQI measurement will be marked as CQI1.

On stage (ST104-2) block 903B measurements performs CQI CQI measurement using the signals from all areas of the symbols in the signal used for measuring CQI, extracted in step (ST102). The result of the CQI measurement unit 903B CQI measurement will be called CQI2.

On stage (ST105) determiner 905 podagra compares CQI1 and CQI2, which represent the CQI measurement results obtained in step (ST104-1) and on stage (ST104-2), and determines whether podcat RN normal podagra or "podagra MBSFN that RN uses as the reverse channel. Examples of the detection method include a method in which perform the determination using the expression (l) and expression (2), and the way in which the definition of a perform, using the expression (3) and expression (4).

On stage (ST106-1), when determining that podcat RN is a "podcat MBSFN that RN uses as the reverse channel" on stage (ST105), block 907 storage device CQI stores the result of determination and CQI1.

On stage (ST106-2), when determining that podcat RN is a normal podcat on stage (ST105),block 907 storage device CQI stores the result of determination and CQI2.

On stage (ST107) generator 909 feedback information, generates feedback information from the definition podagra and CQI values that you saved in step (ST106-1) or step (ST106-2).

On stage (ST108) processor 329 transmission and RF block 331 transfer process transfer for feedback information generated at step (ST107), and transmits the result in the eNB.

As described above, in the second modification in accordance with the present embodiment UE1 compares the CQI eNB, measured using the first two characters, and CQI eNB, measured using the third and subsequent symbols, and determines whether podcat RN normal podagra or "podagra MBSFN that RN uses as the reverse channel, and UE1 performs CQI measurement eNB suitable for everyone, and transmits feedback this result in eNB.

Therefore, UE1 under the control of eNB, CQI, when there is no interference from RN, can be accurately measured. In addition, since eNB is not necessary to notify UE1 about information related to RN, in comparison with the present embodiment, the overhead signals transmitted through the downward communication channel may be reduced.

While description has been presented as an antenna, in the above embodiment, the present invention is similarly applicable to the case of the port is nanny. The antenna port refers to a logical antenna that includes one or more than one physical antenna. Thus, the antenna port does not always relate to a single physical antenna, but sometimes refers to the array of antennas, etc., including many antennas. For example, in LTE, it is not specified how many physical antennas includes port antennas, and the reference signals from different base stations is defined as the minimum modules that can be passed. In addition, the antenna port is sometimes defined as the minimum module, which is multiplied by the weighting vector pre-encoding.

In addition, the functional blocks used to describe the variants of implementation, typically implemented as an LSI (LSI, a large integrated circuit), which is an integrated circuit. These schemes can be individually formed as one chip, or may be formed as one chip, which includes some or all of them. While LSI is mentioned in this description, it is sometimes called IC, system LSI, super LSI or ultra LSI in accordance with the difference in the degree of integration.

Furthermore, the method of integration schemes is not limited to LSI; functional blocks can be implemented as a specialized circuit or General purpose processor. After manufacturing the LSI can the t used a programmable FPGA (LMP, logical matrix, user-programmable) or CPU configuration, where the configuration of the connections and settings of the elements of the LSI circuits can be changed.

In addition, it should be noted that, when the technology integration scheme, which replaces the LSI appears as a result of advances in semiconductor technology or a derivative other technology, the functional blocks may be integrated using this technology. The adaptation of biotechnology, etc. are also possible.

While the present invention has been described in detail with reference to a specific variant of implementation, to a person skilled in the art it is obvious that various changes and modifications can be added without indentation from the essence and scope of the present invention.

This application is based on the application for Japanese patent application (patent application No. 2009-119104), filed may 15, 2009, the contents of which is represented herein by reference.

INDUSTRIAL APPLICABILITY

The wireless terminal and the communication method in accordance with the present invention provide the result of the fact that the quality of the channel in its own cell, when there is no mutual interference from neighboring cells can be accurately measured, and is useful as a wireless terminal, etc., that transmits and receives data to and from the base station./p>

The LIST of NUMBERS of the REFERENCE POSITIONS

100, 400, 700: base station

105: RF transmission unit

107: Processor transfer

109: a Multiplexer for signal

111: Generator information management

113: Unit of instruction method of measuring CQI

115: Block scheduling

117: a storage Unit CQI

119: Module extraction CQI

121: the Processor receiving

123: RF block reception

200, 500A, 500B, 800: relay Host

300A, 300B, 600, 900A, 900B: Terminal wireless

301: Antenna

303: Switch (SW)

305: RF block reception

307: the Processor receiving

309: the extraction Module signal measuring CQI

311: Unit information RN

313: Controller signal retrieval

315: removal Module podagra

317: Unit information management

319: Controller measuring CQI

321: the extraction Module

323: the Unit of measurement CQI

325: a storage Unit CQI

327: Generator feedback information

329: Processor transfer

331: RF transmission unit

401: a storage Unit CQI/podagra

601: Detector podagra high quality

603: Generator feedback information

701: Module extraction CQI/result definition

703: a storage Unit CQI/result definition

901: the extraction Module

903A: Block CQI measurements

903B: Blogsmerrill CQI

905: the Determinant podagra

907: a storage Unit CQI

909: Generator feedback information

1. A terminal device, comprising:
a receiving unit configured to receive information indicating podckaji, which include podcat, which no data is being transferred to another hundredth and for which the measured quality indicator channel (CQI); and
measurement unit, configured to measure CQI for podkatov that indicates such information.

2. The terminal device under item 1, in which the other cell is a neighboring cell.

3. The terminal device under item 1, in which the other honeycomb causes mutual interference.

4. The terminal device under item 1, in which podcat multicast broadcast Single frequency communication network (MBSFN) included in podckaji that indicates such information.

5. The terminal device under item 1, in which podckaji that indicates such information vary depending on the cell.

6. The terminal device under item 1, in which the measurement unit measures the CQI for podagra in which the other cell does not cause mutual interference, based on the aforementioned information.

7. The terminal device under item 1, in which the measurement unit measures the CQI using the signal, which is displayed on or after the third character in potcake./p>

8. The terminal device under item 1, in which the measurement unit measures the CQI using the signal, which is displayed at the seventh character in potcake.

9. The device is a base station, comprising:
transmitting unit configured to transmit the terminal information indicating podckaji, which include podcat, which no data is being transferred to another hundredth and for which the measured quality indicator channel (CQI); and
a receiving unit, configured to take CQI, which measures the terminal podkatov that indicates such information.

10. The device of the base station under item 9, in which the other cell is a neighboring cell.

11. The device of the base station under item 9, in which the other honeycomb causes mutual interference.

12. The device of the base station under item 9, which podcat multicast broadcast Single frequency communication network (MBSFN) included in podckaji that indicates such information.

13. The device of the base station under item 9, which podckaji that indicates such information vary depending on the cell.

14. The device of the base station under item 9, in which the receiving unit receives CQI, which measures the terminal, based on said information for podagra in which another honeycomb causes mutual interference.

15. The basic device is the first station on p. 9, in which the transmitting unit transmits a signal, which is displayed on or after the third character in podagra, and a receiving unit, which receives CQI, which measures the terminal using the signal, which is displayed on or after the third character in potcake.

16. The device of the base station under item 9, in which the transmitting unit transmits a signal, which is displayed at the seventh character in podagra, and a receiving unit, which receives CQI, which measures the terminal using the signal, which is displayed at the seventh character in potcake.

17. The method of communication, comprising:
receiving information indicating podckaji, which include podcat, which no data is being transferred to another hundredth and for which the measured quality indicator channel (CQI); and
the CQI measurement for podkatov that indicates such information.

18. The method of communication, comprising:
transfer to the terminal information indicating podckaji, which include podcat, which no data is being transferred to another hundredth and for which the measured quality indicator channel (CQI); and
the reception CQI, which measures the terminal podkatov that indicates such information.

19. Integrated circuit for controlling a process, comprising: receiving information indicating podckaji, which include podcat, which no data is being transferred to another hundredth and for which u is the indicator of channel quality (CQI); and
the CQI measurement for podkatov that indicates such information.

20. Integrated circuit for controlling a process, comprising: transmitting to the terminal information indicating podckaji, which include podcat, which no data is being transferred to another hundredth and for which the measured quality indicator channel (CQI); and
the reception CQI, which measures the terminal podkatov that specifies mentioned information.