Pilot signal transmission method, base station, mobile station and cellular communication system using said method

FIELD: information technology.

SUBSTANCE: during transmission of a cell-specific pilot signal by a base station which can mix and then transmit unicast data and broadcast/multicast data as downstream data, the difference between the initial phase of a cell-specific pilot signal transmitted in a subframe in which the base station transmits the unicast data and the initial phase of a cell-specific pilot signal transmitted in the next subframe is equal to the difference between the initial phase of a cell-specific pilot signal transmitted in a subframe in which the base station transmits the broadcast/multicast data and the initial phase of a cell-specific pilot signal transmitted in the next subframe.

EFFECT: cell searching without increasing the scale or complicating the structure of the mobile station.

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The technical FIELD

The invention relates to a method for transmitting a pilot signal to the base station, the mobile station and the cellular system that uses this method.

The LEVEL of TECHNOLOGY

In the cellular system mobile station typically performs a cell search process to search for honeycomb, which connects the wireless link.

The cell search performed using the sync channel (SCH), included in the radio frame in the downlink. In addition to the sync channel can also be used typical cell pilot channel and a broadcast channel (BCH) (non-Patent Document 1: 3GPP TR 25. 814 V7.0.0). Example search cell will be described with reference to the drawings.

In Fig. 1 shows an example configuration of a radio frame transmitted by the transmitter of the base station.

As indicated in Fig. 1, a radio frame create through various channels, multiplexed in a two-dimensional direction in time and frequency. In the example of Fig. 1 radio frame is 10 subbarow, SF1-SF10, in the time direction, and each Subcat consists of two time intervals: the time interval of the first half and the time interval of the last half.

In each time interval, the resource uniquely determined by the character position (time) and the position of the subcarrier (frequency), called the "resource"element.

Different channels, multiplexer the bathrooms in the time interval, include a primary sync channel (P-SCH), the secondary sync channel (S-SCH and the channel pilot signal (P-CH).

The primary sync channel (P-SCH) is a common reference for all cells and is multiplexed in time in the terminal symbols of the first half of time interval #0 from the first Subhadra SF1 and the first half of the time interval #10 of the sixth Subhadra SF6, respectively.

The secondary sync channel (S-SCH) there is a standard, which is typical for the cell ID group and is a group of cell identifiers assigned to each cell in advance. The secondary sync channel (S-SCH) multiplexer time in the second symbol from the corresponding edges of the time interval of the first half of #0 from the first Subhadra SF1 and the time interval of the first half of #10 of the sixth Subhadra SF6.

Channel pilot signal (P-CH) also has a characteristic of a cell scrambling code, which is information for determining cell and is multiplexed in time in the first symbol and the fourth symbol of each time interval#0, #1, #2....

The cell ID assigned to each cell, and the characteristic of a cell scrambling code correspond one-to-one, thus the mobile station can determine the ID of the cell in which the mobile station is a defining characteristic of the cell scrambling code.

For typical cell scrambling code, for example, can be used a method using a sequence of pseudo-random number sequence, characteristic of the base station multiplied by the rotation sequence of phases, which is orthogonal across sectors within the same base station, or a method using generalized pulse signal as a sequence for pseudo-random number sequence.

Fig. 2 explains the procedure of cell search processing executed in the mobile station. When the base station adopted radio format shown in Fig. 1, a mobile station in the processing at the first stage detects a correlation with a replica signal time of the primary sync channel (P-SCH), which is a known standard, and binds over time, showing the maximum correlation value, for example, as binding in time of Subhadra (step S1).

In the second step executes the processing fast Fourier transform (FFT) at the chosen time, identified in the first stage, so that the adopted radio format was converted into a signal of a frequency domain, and a secondary sync channel (S-SCH) is extracted from the signal of the frequency domain. Then determine the correlation of the extracted secondary sync channel (S-SH) and each replica of a possible sequence of channel secondary synchronization and possible sequence of channel secondary timing having the maximum correlation value, for example, is defined as a detected sequence of the secondary sync channel. The group ID of the cell are determined by the detected secondary sync channel (step S2).

In the third stage performs the processing fast Fourier transform (FFT) with the timing detected in the first stage, so that the signal is converted into a signal of a frequency domain, and the channel pilot signal (P-CH) is extracted from the transmitted frequency domain. Then the extracted channel pilot signal (P-CH) correlated with a replica of the scrambling code corresponding to each possible cell identity included in the cell ID group detected in the second step, and the cell identity corresponding to the possible scrambling code indicating the maximum correlation value, and determine, for example, as a detected cell ID (step S3). Through this can be specified cell in which the mobile station is located.

In the case of 3GPP (Partnership Project Third generation), the technical requirements of the service broadband/group multimedia broadcasting (MEMS) are being reviewed with the aim to standardize the next generation portable phone is Noah communication.

For example, the data of MBMS multiplexer time data unicast module Subhadra. Non-patent Document 1 describes a method to improve the reception quality by using a guard interval, which is longer than the guard interval used for data unicast transmission of the same data from a variety of hundred at the same time binding, using the same frequency, and combining the received signals at the mobile station.

This is called "single frequency network". In this case, the same total for cell pilot signal among hundreds passed for demodulation of one and the same MBMS data transmitted from multiple cells.

Non-patent Document 2 describes that the control signal for unicast multiplexer with Subhadra allocated for MBMS data (hereinafter called Subhadra MBMS), and characteristic cell pilot signal having a different pattern in each cell for unicast multiplexer with Subhadra for MBMS demodulation control signal and the CQI measurement.

The configuration of the pilot signal of Subhadra MBMS is also described in non-patent document 3. According to this configuration, the characteristic of a cell pilot signal for unicast multiplexer with only the first character of Subhadra MBMS.

In the case of temporary mu is tabletservice of Subhadra MBMS, as mentioned above, in time multiplexer subsidry with different guard interval length. During the initial cell search, which is performed when the power of the mobile station, there is a problem on the above-mentioned third step of the cell search, since the information on the length of a guard interval in a received subcate unavailable.

This issue is described in detail in non-patent document 4. One way to solve this problem is to improve the method of attaching a guard interval subbarow MBMS, as described in non-patent document 4. Another way is as described in non-patent Document 5, using only pilot signals in subcate, in which the channel synchronization has been multiplexed with the initial cell search. Non-patent document 1: 3GPP TR 25. 814 V 7.0.0. Non-patent document 2: 3GPP TSG-RAN WGl, Rl-060372, "Multiplexing the pilot signal and Control Channels unicast transmission in E-MBMS for Reverse channel E-UTRA", non-Patent document Texas Instruments 3: 3GPP TSG-RAN WGl, Rl-070383, "Reference signals for a mixed MBMS carrier", non-Patent document 4 Nokia: 3GPP TSG-RAN WGl, Rl-060563, "Calculation of the Channel and the structure of the long CP Subhadra for the initial cell search", non-Patent document 5 Fujitsu: 3GPP TSG RAN WGl, Rl-063304, "the three-step Method of Cell Search E-UTRA", NTT DoCoMo, Research Institute of Infocomm, Mitsubishi Electric, Panasonic, Toshiba.

If subsidry MBMS is ultiplexing in the radio frame, the number of resource elements for cell pilot signals in the same radio frame, is reduced compared with the case assignment only subbarow unicast transmission to the radio frame (this dependence can be in some cases reverse).

The number of resource elements for cell pilot signals in the same radio frame, also depends on the number subbarow MBMS, which multiplexer. For example, if the cycle scrambling codes characteristic of the cell pilot signals is one radio frame, the phase of the scrambling code at each timing of the transfer characteristic of the cell pilot signal is changed by multiplexing subbarow MBMS.

As an example in Fig. 3 is illustrated case destination of all subbarow radio frame in a unicast transmission (case 1) and case assignment subbarow #1 and #4 to MBMS (case 2).

In Fig. 3 column "phase characteristic of the cell scrambling code" is based on the assumption that the characteristic of a cell scrambling code is a characteristic of a cell pilot signal resource elements, the selected characteristic of the cell pilot signal transferred from one side of the low frequency and is indicated by the phase characteristic of the cell scrambling code allocated to a resource element on the side of the lowest frequency at each binding time is the new transmission characteristic of the cell pilot signal.

Np denotes the number of resource elements allocated characteristic cell pilot signal in each symbol characteristic cell pilot signal.

In case 1, where all subsidry allocated for unicast transmission, the phase shift characteristic of the cell scrambling code does not occur.

In case 2, on the other hand, subsidry #1 and #4 dedicated MBMS, thus there is a phase shift characteristic of the cell scrambling code.

As indicated by non-patent document 5, when the correlation is determined using a characteristic of a cell pilot signals in subcateg #0 and #5, in which the multiplexed channel synchronization, if there is a phase shift characteristic of the cell scrambling codes, inevitably you need to perform blind detection, since the phase characteristic of the cell pilot signals in cupcake #5 are unknown, therefore, increases the amount of processing and the probability of detection deteriorates.

The INVENTION

Considering the above, the present invention is to simplify the detection of the correlation in the mobile station. Another objective of the present invention is to control the amount of phase change of the beginning of the transmission of the pilot signal to a predetermined value among (sub) frames.

Another objective is to provide a method of transmitting a pilot signal to perform processing of correlation, when Yes is unicast data transmission and Subhadra MBMS multiplexed in the radio frame, causing uneasy shift characteristic of the cell scrambling codes for each timing symbol characteristic cell pilot signal, and consequently to carry out the appropriate processing of the cell search, without increasing computing or complicating the configuration of the mobile station, along with the base station, mobile station and mobile station that uses this method.

In order to achieve the above objectives, this invention describes the transmission method used in a mobile communication system base station. In other words, the present invention uses a method of transmission characteristic of the cell pilot signal in a mobile communication system, in which there is a base station and a mobile station, which performs radio communication with a base station in a cell of radiocommunications, formed the base station and which mixes and transmits unicast data transmission and data broadcast/multicast as downlink data from the base station to the mobile station, and the difference between the phase of the beginning of the typical cell pilot signal transmitted in subcate, in which the base station has transmitted unicast data transmission, and the phase of the beginning of the characteristic honeycomb pilot signal transmitted in the following subcode, equal to the difference between the beginning phase characteristic of the La cell pilot signal, passed Subhadra, in which the base station has transmitted data broadcast/multicast, and beginning phase characteristic of the cell pilot signal transmitted in the following subcode.

Additionally, according to the invention, a base station, which forms the field of radio communication with a mobile station in a mobile communication system, which mixes and transmits unicast data transmission and data broadcast/multicast, includes a control module phase, which manages to equalize the difference between the initial phase characteristic of the cell pilot signal transmitted in subcate, in which the base station has transmitted announced unicast data transmission and the initial phase characteristic of the cell pilot signal to be transmitted in the following subcode, and the difference between the initial phase characteristic of the cell pilot signal passed Subhadra, in which the base station has transmitted data broadcast/multicast, and the initial phase characteristic of the cell pilot signal to be transmitted in the following subcode.

In accordance with the present invention having the above characteristics, in the system, which mixes and transmits unicast data transmission and data of MBMS as a top-down data while processing correl the operation performed at each timing symbol characteristic cell pilot signal, does not cause a phase shift characteristic of the cell scrambling codes, even if the number of resource elements allocated characteristic cell pilot signal in the radio frame varies depending on the number subbarow MBMS that the selected radio frame.

Therefore, the appropriate processing of the cell search carried out without increasing computing or complicating the configuration of the mobile station, and mobile station can be simplified, and the characteristics of this during the processing of the cell search can be improved, therefore, the current invention will be extremely useful in the field of mobile communication.

DESCRIPTION of embodiments

Embodiments of an existing invention will now be described with reference to the drawings.

The first option exercise

The block diagram of Fig. 4 illustrates the invention the configuration of the key parts of the transmitter of the base station.

The transmitter of the base station shown in Fig. 4, includes a selection module 1, module 2 storage sequence of the pilot channel signal, a characteristic of a cell, module 3 store pilot sequence signal common to the cell, module 4 select the pilot signal, module 5-control phase module 6 storage primary channel synchronization module 7 storage of the secondary sync channel, module 8 multi the complexation of channels, module 9 serial/parallel processing, the CPU 10 IFFT module 11 insert a guard interval (GI), module 12 radioparty and the transmitting antenna 13.

Module 1 data selection selects the data And unicast or MBMS data in accordance with the plan and sends one Subcat data to the multiplexing module 8 channels. If module 1 data selection the selected MBMS data to the module 5 phase control instruction is issued adjust the phase.

Module 4 select the pilot signal modifies the way to select the AA sequence of the pilot channel signal, a characteristic of a cell, or a sequence of AV canal pilot signal that is common to the cells, according to the type of data Subhadra, and read the pilot signals from the respective storage module 2 or 3. If the data type of MBMS, module 4 select the pilot signal reads one Subcat MBMS typical cell pilot signals Ns_m, and one Subcat MBMS common to cell pilot signals Ncommon from module 2 of the sequence of channel pilot signal characteristic of the cell, and module 3, the sequence of channel pilot signal that is common to the cells, respectively. If the data type is unicast data transmission, read one Subcat unicast transmission characteristic of the cell pilot signals Ns_u.

In this case, the current phase of module 2 of the sequence to the Nala pilot signal, characteristic of the cell, and module 3, the sequence of channel pilot signal that is common to the cells, increase the value of the phase that was read.

If accepted, the command control phase module 5 management phase promotes the current phase of module 2 of the sequence of channel pilot signal characteristic of the cell, the magnitude (the magnitude of the phase corresponding to Ns_u) - (the amount of phase corresponding to Ns_m).

In other words, the phase adjustments are performed so that the difference between the initial phase characteristic of the cell pilot signal transmitted in subcate, in which the base station has transmitted unicast data transmission, and the initial phase characteristic of the cell pilot signal transmitted in the following subcode, equal to the difference between the initial phase characteristic of the cell pilot signal transmitted in subcate, in which the base station has transmitted data broadcast/multicast, and the initial phase characteristic of the cell pilot signal transmitted in the following subcode.

In other words, in the method of transmitting the pilot signal (for example, a typical cell pilot signal in the mobile communication system in which there is a base station and a mobile station, which performs radio communication with a base station in a cell of radiocommunications, formed the base station, when ratestogo initial transfer phase of the pilot signal, to be transmitted, and the end phase of the excellent transmission between the transmission period of the first module (e.g., subframe, in which the base station transmits a unicast data transmission and the transmission period of the second module (e.g., subframe, in which the base station transmits MBMS data), the base station controls the difference between the initial transfer phase of the pilot signal in the transmission period of the first module and the initial transfer phase of the pilot signal in the transmission period of the second module so as to determine the difference, which is greater than the difference between the initial transmission phase and the end phase of transmission (in the above example, phase advances (amount of phase corresponding to Ns_u) - (the amount of phase corresponding to Ns_m)).

Module 8 multiplexing channels multiplexes the signal of each channel (modulation data) of different channels (e.g., data channel, the pilot channel signal, a sync channel)for transmission to the mobile station UE (User Equipment), and module 9 serial/parallel processing (may be referred to below as S/P Converter) performs serial/parallel conversion of the signal multiplexed by the multiplexing module 8 channels (Nc number of data modulation), and positions each transformed data in each put the total (display).

Fig. 5 explains an example of a configuration of a radio frame, including Subcat MBMS, the illustrated two-dimensional chart in time and frequency. In this example, one radio frame (RF) consists of 10 subbarow (SF), and one Subcat consists of two time slots (SL).

One time interval includes seven symbols (SB) in the case of Subhadra unicast and includes six symbols in the case of MBMS Subhadra 100, as the guard interval length.

Typical cell pilot signal AA multiplexer in the first symbol and a fourth symbol b for each time interval of Subhadra unicast intervals of six subcarriers. The fifth character position b in the direction of the frequency is shifted by three subcarriers from the position of the first character in a direction of frequency.

In case of MBMS Subhadra 100, on the other hand, characteristic of the cell pilot signal AA multiplexer only in the first symbol c in the first half of the time interval in intervals of six subcarriers.

Common to cell pilot signal AB is positioned in the second symbol d and the fifth symbol e each time interval of MBMS Subhadra 100 with intervals of two subcarriers. The position of the fifth symbol in the direction of the frequency shift on one of subcarriers from the position of the second symbol in the direction of frequency.

Typical cell scrambling code being transmitted as ha is atterny for cell pilot channel signal AA, however, is controlled by module 5 phase control so that the difference between the initial phase characteristic of the cell pilot signal between each Subhadra has become a predetermined value. Fig. 6 explains an example.

In Fig. 6 the first Subcat SF #1 and the third Subcat (#3) radio frame scheduled for unicast transmission, and the second Subcat (#2) is assigned to MBMS (hereinafter, the X-th subcar denote as Subcat (#X)).

Np is the number of resource elements allocated to a channel characteristic of the cell pilot signal in each characteristic honeycomb symbol of the pilot signal. In the example of Fig. 6, the number of characters typical cell pilot signal of one subcode unicast equal to 4, thus Ns_u=4 Np, and the number of characters typical cell pilot signal of one subcode MBMS, is equal to 1, thus Ns_u=Np.

Typical cell scrambling codes positioned on the side of low frequency to resource elements allocated characteristic cell pilot signal symbol characteristic cell pilot signal, which is passed in the first radio frame.

In cupcake (#2)placed in the MBMS characteristic cell pilot signal is multiplexed only in the first symbol of the first half of the time interval. Therefore, the phase characteristic of the cell scrambling code, which is allocated to the side of the lowest frequency of the next characteristic of a cell of prodigal, promote to 3 Np through module 5 management phase, and the phase becomes equal to P (8 NP).

After that, every time multiplexer Subcat MBMS, the phase characteristic of the cell scrambling code are promoting the same way. As a consequence, the phase of the first characteristic of the cell of the symbol of the pilot signal of each subcode determine if the presence or absence of Subhadra MBMS radio frame.

Returning to Fig. 4, the CPU 10 IFFT processes the modulated data is placed in each subcarrier, the Nc blocks corresponding to the number of subcarriers, and convert them into signals in the time domain.

Module 11 insert inserts a guard interval guard interval signals in time domain.

Module 12 radioparty performs the desired radiooperator, such as frequency conversion of signals insertion of guard interval in a predetermined radio signals (up conversion), and transmits the radio signals along the path of propagation through the transmitting antenna 13.

Now will be described the configuration and operation of the mobile station in accordance with the above-mentioned base station.

Fig. 7 is a block diagram illustrating the configuration of the key parts of the mobile station in the OFDM communication system. The mobile station shown in Fig. 7 contains, for example, the module receiving antenna 20, the module 21 radioparty, the module 200, and less the key of the first stage, module 210 of the processing of the second stage, the module 220 of the processing of the third stage, the module 22 removal of the guard interval and the module 23 of the FFT processing.

The module 200 processing of the first stage is the module 201 of the storage signal replica of the primary sync channel, the processor 202 correlation module 203 averaging time and the module 204 detection time binding of Subhadra. The module 210 of the processing of the second stage is a module 211 retrieve the secondary sync channel, the processor 212 correlation module 213 storage possible secondary synchronization code, the module 214 averaging time and module 215 detecting binding time radio frame of the secondary synchronization code. The module 230 of the processing of the third stage there is a module 231 extraction channel characteristic cell pilot signal, the module 232 storage potential characteristic of the cell scrambling code, the module 233 of the control phase, the processor 234 correlation module 235 averaging time and the module 236 detection characteristic of the cell scrambling code.

Now will be described the receive processing for the mobile station that has this configuration.

The module 20, the receiving antenna receives the radio signal from the above-mentioned base station BS, and the module 21 radioparty performs the necessary processing to the radio reception, such as processing associated with the down-conversion frequency is, for radio signals received by the module 20 of the receiving antenna.

In the first step of cell search processing module 200 of the processing of the first phase, synchronously detects the timing of Subhadra on the basis of the correlation of a received signal from module 21 radioparty and signal replica of the primary sync channel (P-SCH), which is a known pattern (Fig. 2: step SI).

To do this in the module 200, the processing of the first stage, the module 201 of the storage signal replica of the primary sync channel is stored in advance signals replicas of the primary sync channel, and the processor 202 correlation determines the correlation of the received signal and the signal of the replica stored in the module 201 of the storage signal replica of the primary sync channel.

The result of the correlation processing by the processor 202 correlation averaged in time module 203 averaging time and is input to module 204 detection time binding of Subhadra. Module 204 detection time binding of Subhadra detects the timing of Subhadra received signal based on the result of the correlation processing by the processor 202 of the correlation. For example, the timing at which the correlation is maximum, can be detected as binding in time of Subhadra.

In the second step of the cell search processing (Fig. 2: step S2), mo is ul 210 processing of the second stage performs the processing fast Fourier transform (FFT) - based binding-time Subhadra, defined in the module 200, the processing of the first stage, as mentioned above, remove the secondary sync channel and detects secondary synchronization code and a binding time frame.

For this purpose, the module 22 remove guard interval removes the guard intervals inserted in the received signals, which are processed by the module 21 radioparty-based binding-time Subhadra defined by module 204 detection timing of Subhadra module 200 processing of the first stage.

Module 23 FFT processing converts these received signals in the time domain into signals in the frequency domain by performing FFT processing on the correct signals after removal of the protective intervals using a predetermined unit of time (at least the correct length of the symbol), that is, using the FFT window.

Module 210 extraction of the secondary sync channel retrieves the resource elements in which multiplexed secondary channel synchronization signal from the frequency domain after the FFT processing by the CPU 23 FFT. On the other hand, possible secondary synchronization codes that will be used for correlation processing in the processor 212 of the correlation stored in advance in the module 213 storage secondary synchronization code 213. The processor 212 of the correlation determines the correlation of the secondary sync channel,the extracted module 211 retrieve the secondary channel synchronization and possible secondary synchronization codes, stored in the module 213 storage possible secondary synchronization code.

The output of the processor 212 of the averaged correlation module 214 averaging time, and module 215 detecting binding time radio frame secondary synchronization code detects secondary synchronization code and the timing of radio frames on the basis of the results of the correlation processing in the processor 212 of the correlation. For example, possible secondary synchronization code having a maximum correlation can be determined as detected secondary synchronization code. These define the group cell.

Module 220 of the processing of the third stage performs the processing of detecting a characteristic of a cell pilot signal (Fig. 2: step S3), and the received signal after FFT processing is input to module 221 extraction channel characteristic cell pilot signal. Module 221 extract the channel characteristic of the cell extracts the pilot signal resource element in which a characteristic of a cell pilot signal multiplexed signals from the frequency domain after processing module 23 of the FFT processing.

Module 223 storage potential characteristic of the cell scrambling code preserved replica of possible characteristic of the cell scrambling codes used for processing the correlation processor 224 correlation.

The processor 224 correlation determined yet correlation characteristic of the cell pilot signal, the extracted module 221 extraction channel characteristic cell pilot signal and possible characteristic honeycomb replica scrambling code stored in the module 222 storage potential characteristic of the cell scrambling code.

The output processor 224 correlation average time module 225 averaging time, and module 226 detection characteristic of the cell scrambling code detects a characteristic of a cell scrambling code based on the result of the correlation processing in the processor 224 correlation. For example, a possible characteristic of a cell scrambling code having the maximum correlation may be selected as the detected characteristic of the cell scrambling code. This honeycomb, which is located in a mobile station identified in the search result cell.

The second option exercise

The second variant implementation example, when the first version of the implementation used in the system, which can transmit downstream signals using one of a variety of frequency ranges. The configuration of the base station and the configuration of the mobile system is basically the same as the configuration shown in Fig. 4 and Fig. 7, described above.

Fig. 8 is a diagram illustrating a second variant implementation, and explains the case I have 1200 subcarriers case II with 600 raised the seashore, case III with 300 subcarriers case IV with 144 subcarriers, and case V, with 72 subcarriers as frequency ranges.

Characteristic of the second variant implementation is that the channel SCH synchronisation passed with band width W, which is equal to the minimum frequency in the 72 subcarriers in the center, for all cases of bands I-V, with multiple subcarriers.

Fig. 9 explains the phase characteristic of the cell pilot signals in each frequency band according to the second variant of implementation. In the case of Subhadra MBMS, also multiplexing, the phase characteristic of the cell pilot signal at each timing of the transmit adjust module 5 management phase (see Fig. 4), as shown in Fig. 9.

Regardless of which frequency band is used, the phase characteristic of the cell pilot signal is always the same in the range W of 72 Central subcarriers.

During the initial cell search, frequency range of these received signals is unknown, therefore, the cell search performed by receiving only signals having a bandwidth H, is equal to the range of the minimum frequency. Module 21 radioparty signals having a bandwidth that is equal to the range of the minimum frequency, accept, using an analog filter. This technique can be performed after the module 21 am glad the of a, using a digital filter. Or reception can be performed in and after module 21 radioparty.

The first phase of SI and the second stage S2 search cell described in the first embodiment, is performed to detect binding time Subhadra, the cell ID group and the binding time of the radio frame. As mentioned above, in the channel SCH synchronisation signals are transmitted at any frequency in the center frequency band having a bandwidth W, which is equal to the range of the minimum frequency, so even if the frequency range is unknown, the first stage S1 and the second stage S2 of the cell search can be performed using channel SCH synchronisation.

Then perform the third stage S3 search cell described in the first embodiment, and defines the characteristic of a cell scrambling codes. In this case, the phase at each timing of the transfer characteristic of the cell pilot signal does not depend on which frequency band is used, and does not depend on multiplexed whether Subcat MBMS thus the mobile station can detect a characteristic of a cell scrambling codes, not knowing what range of frequencies is used, and without causing the phase shift characteristic of the cell pilot signal multiplexing Subhadra MBMS.

A third option exercise

The third variant implementation is also based on n the ditch embodiment, and the transmitter of the base station and mobile stations have the same configuration as the configuration described in the first embodiment.

The third option is the case when the characteristic of the cell pilot signal subcate MBMS transfer only to a limited part of the range.

This configuration is used when the control signal unicast passed subcate MBMS only in a limited part of the range.

Fig. 10 explains an example of a configuration of a radio frame according to the third variant of implementation. In other words, in the example illustrated in Fig. 10, subsidry #0 and #2 are subquadrate unicast and Subcat #1 is Subhadra MBMS. In subcate MBMS typical cell pilot signal multiplexer only four subcarriers in the centre from the beginning of Subhadra.

Module 5 management phase promotes the 19th phase Subhadra #0 to 4, and determines the phase of the first characteristic of the cell pilot signal as 23 subcate #1. Then module 5 management phase promotes the 26-th phase Subhadra #1 14 and determines the phase of the first characteristic of the cell pilot signal as 40 in cupcake #2. Accordingly, the phase characteristic of the cell pilot signals may be continuous in subcateg #0, #1 and #2.

Fig. 11 is another example of a radio frame according to the third variant of implementation. The phase is, I can pay tithing typical cell pilot signal Subhadra #1 is defined as 20, to be continuous with the phase characteristic of the cell pilot signals in subcate #0. To continue Subcat #1 in #2, the phase control so that the 23-I phase characteristic of the cell pilot signals Subhadra #1 was promoted by 17.

(Appendix 1) Method of transmission characteristic of the cell pilot signal used in the mobile communication system in which there is a base station and a mobile station, which performs radio communication with a base station in a cell of radiocommunications, formed the base station and which mixes and transmits unicast data transmission and data broadcast /multicast as downlink data from the base station to the mobile station, the method comprising: the base station that establishes the difference between the initial phase characteristic of the cell pilot signal transmitted in subcate, in which the base station has transmitted unicast data transmission, and primary the phase characteristic of the cell pilot signal transmitted in the following subcode, equal to the difference between the initial phase characteristic of the cell pilot signal transmitted in subcate, in which the base station has transmitted data broadcast/multicast, and the initial phase characteristic of the cell pilot signal transmitted in the following subcode.

(Appendix 2) Method of transmission characteristic of the cell pilot signals is and according to addition 1, further comprising: the base station determining the beginning position of the transmission in the following subcate typical cell pilot signal to be transmitted in the following subcode of Subhadra, in which the base station has transmitted unicast data transmission equal to the starting position of the transfer in the following subcate typical cell pilot signal to be transmitted in the following subcode of Subhadra, in which the base station has transmitted data broadcast/multicast.

(Appendix 3) Method of transmitting a pilot signal in a mobile communication system, in which there is a base station and a mobile station, which performs radio communication with a base station in a cell area of the radio cell formed by the base station, and, when the difference between the initial transfer phase of the pilot signal to be transmitted, and the phase of the end of transmission of this different between the transmission period of the first module and the transmission period of the second module, the base station controls the difference between the initial transfer phase of the pilot signal in the transmission period of the first module, and the initial phase of transmission of the pilot signal in the transmission period of the second module is controlled so that a predetermined difference which is greater than the difference between the initial transmission phase and the phase of the end of transmission.

(Appendix 4) base station, Kotor, which forms the field of radio communication with a mobile station in a mobile communication system, which mixes and transmits unicast data transmission and data broadcast/multicast base station, comprising: a module phase control to control the installation of the difference between the initial phase characteristic of the cell pilot signal transmitted in subcate, in which the base station has transmitted unicast data transmission, and the initial phase characteristic of the cell pilot signal to be transmitted in the following subcode, equal to the difference between the initial phase characteristic of the cell pilot signal transmitted in subcate, in which the base station has transmitted data broadcast/multicast, and the initial phase characteristic honeycomb pilot signal to be transmitted in the following subcode.

(Appendix 5) Mobile station, which forms the field of radio communication with the base station in the mobile communication system, which mixes and transmits unicast data transmission and data broadcast/multicast, mobile station, comprising: a receiving module for receiving characteristic of the cell pilot signal that is managed by the base station so that the difference between the initial phase characteristic of the cell pilot signal transmitted in subcate, in which the base station has transmitted unicast data transmission, and the initial phase characteristic of the cell pilot signal, to the which will be given in the following subcode, and the difference between the initial phase characteristic of the cell pilot signal transmitted in subcate, in which the base station has transmitted data broadcast/multicast, and the initial phase characteristic of the cell pilot signal to be transmitted in the following subcode, is one and the same predetermined value; and a control module phase to control the phase of the received characteristic of the cell pilot signal, which will be used to calculate the correlation with the characteristic cell pilot signal based on the phase calculated according to the position adopted Subhadra in the radio frame.

(Appendix 6) mobile telecommunications System, in which there is a base station and a mobile station, which performs radio communication with a base station in a cell of radiocommunications, formed the base station, and she mixes and transmits unicast data transmission and data broadcast/multicast as downlink data from the base station to the mobile station and the base station includes: a module phase control to control the installation of the difference between the initial phase characteristic of the cell pilot signal transmitted in subcate, in which the base station has transmitted unicast data transmission, and the initial phase characteristic honeycomb pilot signal to be transmitted in the following is Subhadra, equal to the difference between the initial phase characteristic of the cell pilot signal transmitted in subcate, in which the base station has transmitted data broadcast/multicast, and the initial phase characteristic of the cell pilot signal to be transmitted in the following subcode, and the mobile station includes: a control module phase to phase control characteristic of the cell pilot signal, which will be used to calculate the correlation with the received characteristic of the cell pilot signal based on the phase calculated according to the position in the radio frame received Subhadra.

(Appendix 7) the mobile communication System according to the Supplement 6, and subcate multiplexers different number of subcarriers using any set of frequency ranges, and the control module phase in the base station controls the phase so that the range corresponding to the channel synchronization in the very narrow range of frequencies from a set of frequency bands corresponded to the center of each of the multiple frequency ranges.

(Appendix 8) the mobile communication System according to the Supplement 6, and specific to cell pilot signal subcode, which selected data broadcast/multicast transmit only a limited part of the range, and the control module phase are made so as to advance the phase of x the characteristic cell pilot signal in the following subcate by the amount of phase shift from a limited selection of ranges.

BRIEF DESCRIPTION of DRAWINGS

Fig. 1 is an example of a configuration of a radio frame transmitted from the transmitter of the base station.

Fig. 2 explains the procedure of cell search processing performed in the mobile station.

As an example in Fig. 3 is illustrated the distribution of all subbarow radio frame in a unicast transmission and the distribution subbarow MBMS.

Fig. 4 is a block diagram illustrating the configuration of the key parts of the transmitter of the base station according to the invention.

Fig. 5 is an example of the configuration of the radio frame, including Subcat MBMS, the illustrated two-dimensional chart in time and frequency.

Fig. 6 is an example where the control module phase controls the phase characteristic of the cell scrambling code is similar to symbols characteristic of the cell pilot signal.

Fig. 7 is a block diagram illustrating the configuration of the key parts of the mobile station in the OFDM communication system.

Fig. 8 is a diagram illustrating a second variant implementation.

Fig. 9 explains the phase characteristic of the cell pilot signals in each frequency band according to the second variant implementation.

Fig. 10 explains an example of a configuration of a radio frame according to the third variant of implementation.

Fig. 11 is another example of a radio frame according to the third variant of implementation.

EXPLANATION LINKS

1 MODULE DATA SELECTION

2 MODULE STORAGE CHARACTERISTIC of the CELL SEQUENCE of the PILOT CHANNEL

3 MODULE STORAGE TOTAL FOR CELL SEQUENCE of the PILOT CHANNEL

4 the SELECTION MODULE PILOT SIGNAL

5 MODULE MANAGEMENT PHASE

6, the STORAGE MODULE of the PRIMARY SYNC CHANNEL

7 MODULE STORAGE SECONDARY SYNC CHANNEL

8 MODULE MULTIPLEXING CHANNELS

9 MODULE SERIAL/PARALLEL PROCESSING

10 the IFFT PROCESSOR

11 MODULE INSERT guard INTERVAL

12 MODULE RADIOPARTY

13 TRANSMITTING ANTENNA

20 MODULE RECEIVING ANTENNA

21 MODULE RADIOPARTY

22 MODULE REMOVE guard INTERVAL

23 PROCESSING MODULE FFT

200 PROCESSING MODULE of the FIRST STAGE

210 PROCESSING MODULE of the SECOND STAGE

220 PROCESSING MODULE of the THIRD STAGE

1. The mode of transmission characteristic of the cell pilot signal used in a mobile communication system that includes a base station and a mobile station, which performs radio communication with a base station in a cell of radiocommunications, formed the base station, and which mixes and transmits unicast data transmission and data broadcast/multicast data stream downlink from the base station to the mobile station containing this is, through the base station sets the difference between the initial phase characteristic of the cell pilot signal transmitted in subcate, in which the base station has transmitted unicast data transmission, and the initial phase characteristic of the cell pilot signal transmitted in the following subcode, equal to the difference between the initial phase characteristic of the cell pilot signal transmitted in subcate, in which the base station has transmitted data broadcast/multicast, and the initial phase characteristic of the cell pilot signal transmitted in the following subcode.

2. The mode of transmission characteristic of the cell pilot signal according to claim 1, additionally containing a stage at which: through the base station sets the beginning position of the transmission in the following subcate typical cell pilot signal to be transmitted in the following subcode of Subhadra, in which the base station has transmitted unicast data transmission equal to the starting position of the transfer in the following subcate typical cell pilot signal to be transmitted in the following subcode of Subhadra, in which the base station has transmitted data broadcast/multicast.

3. The base station that forms the field of radio for communication with a mobile station in a mobile communication system, which mixes and eredet data is unicast data and broadcast/multicast, contains the management module phase control so as to set the difference between the initial phase characteristic of the cell pilot signal transmitted in subcate, in which the base station has transmitted unicast data transmission, and the initial phase characteristic of the cell pilot signal to be transmitted in the following Subhadra, was equal to the difference between the initial phase characteristic of the cell pilot signal transmitted in subcate, in which the base station has transmitted data broadcast/multicast, and the initial phase characteristic of the cell pilot signal to be transmitted in the following subcode.

4. Mobile station, which forms the field of radio communication with the base station in the mobile communication system, which mixes and transmits unicast data transmission and data broadcast/multicast containing:
a receiving module for receiving characteristic of the cell pilot signal that is managed by the base station so that the difference between the initial phase characteristic of the cell pilot signal transmitted in subcate, in which the base station has transmitted unicast data transmission, and the initial phase characteristic of the cell pilot signal to be transmitted in the following subcode, and the difference between the initial phase characteristic of the cell pilot signal transmitted in subcate in which the om base station has transmitted data broadcast/multicast, and the initial phase characteristic of the cell pilot signal to be transmitted in the following subcode, is one and the same predetermined value; and
module phase control to control the phase of the received characteristic of the cell pilot signal, which will be used to calculate the correlation with the characteristic cell pilot signal based on the phase calculated according to the position adopted Subhadra in radiokate.

5. System for mobile communications, which contains a base station and a mobile station, which performs radio communication with a base station in a cell of radiocommunications, formed the base station, and which mixes and transmits unicast data transmission and data broadcast/multicast data stream downlink from the base station to the mobile station and the base station includes a control module phase control so as to set the difference between the initial phase characteristic of the cell pilot signal transmitted in subcate, in which the base station has transmitted unicast data transmission, and the initial phase characteristic honeycomb pilot signal to be transmitted in the following Subhadra, was equal to the difference between the initial phase characteristic of the cell pilot signal transmitted in subcate, in which the base station is handed Yes the data broadcast/multicast, and the initial phase characteristic of the cell pilot signal to be transmitted in the following subcode, and
moreover, the mobile station includes a management module phase to phase control characteristic of the cell pilot signal, which will be used to calculate the correlation with the received characteristic of the cell pilot signal based on the phase calculated according to the position adopted Subhadra in radiokate.

6. The mobile communication system according to claim 5, in subcate multiplexers different number of subcarriers using any of a variety of frequency ranges, and the control module phase in the base station controls the phase so that the range corresponding to the channel synchronization in the very narrow range of frequencies from a set of frequency bands corresponded to the center of each of the multiple frequency ranges.

7. The mobile communication system according to claim 5, in which the characteristic of the cell pilot signal subcode, which selected data broadcast multicast transmit only a limited part of the range, and the control module phase are made so as to advance the phase characteristic of the cell pilot signal in the following subcode on the amount of phase shift from a limited selection of ranges.

8. The method of sending the pilot signal in the mobile communication system containing a base station and a mobile station, to ora performs radio communication with a base station in a cell of radiocommunications, formed the base station, and,
when the difference between the initial transfer phase of the pilot signal to be transmitted, and the phase of end of transmission varies between the transmission period of the first module and the transmission period of the second module, the base station controls the difference between the initial transfer phase of the pilot signal in the transmission period of the first module and the initial transfer phase of the pilot signal in the transmission period of the second module so that a predetermined difference which is greater than the difference between the phase of the beginning of the transmission and phase of the end of transmission.



 

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