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Method for setting subbands in multicarrier communication system and radio base station apparatus

Method for setting subbands in multicarrier communication system and radio base station apparatus
IPC classes for russian patent Method for setting subbands in multicarrier communication system and radio base station apparatus (RU 2544781):
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Reception device, reception method and programme Reception device, reception method and programme / 2531256
Invention relates to communication engineering and can be used in a digital broadcasting system. The reception device includes a pilot signal pick up unit, an estimation unit, an interpolator, a distortion corrector, a calculator and a transmission channel characteristic determining unit. The technical result is high noise-immunity during multibeam information transmission.
Band selection method for mobile communication system built around orthogonal frequency division multiple access circuit arrangement Band selection method for mobile communication system built around orthogonal frequency division multiple access circuit arrangement / 2251822
Proposed band selection method for mobile orthogonal frequency division multiple access communication system includes following steps to classify procedures of band selection between sending end and receiving ends with respect to original band selection process, passband width selection process, and periodic band selection process: determination of source band selection code (SC)number for source band selection process; SC number to request passband width for passband width request selection process and periodic SC number for periodic band selection process; determination of periodic SC deferment value in compliance with periodic SC number, and transmission of source SCs, passband width request SC, periodic SCs, and periodic SC deferment values on receiving ends.

FIELD: radio engineering, communication.

SUBSTANCE: group of inventions relates to mobile radio communication. In the apparatus, a modulating unit modulates encoded Dch data to generate Dch data symbols. The modulating unit modulates encoded Lch data to generate Lch data symbols. An assigning unit assigns the Dch and Lch data symbols to subcarriers constituting OFDM symbols and outputs them to a multiplexing unit. At the same time, the assigning section assigns a set of Dch and Lch data symbols to each subcarrier for a respective subband.

EFFECT: simple adaptive link control for transmission with partial scheduling.

21 cl, 15 dwg

 

The technical field to which the invention relates

The present invention relates to a method for the job popolos device and the base station radio communication system with multicarrier.

The level of technology

In recent years in the field of telecommunications, in particular in the field of mobile communications interest in the transmission of information has shifted from speech to various types of information such as images and data. It is likely that the demand for high-speed transmission of information in the future will increase, and for the implementation of such transmission shall require such technology radio transmission, which provides high efficiency at the expense of rational use of limited frequency resources.

The technology of radio transmission that meets this need include OFDM (division Multiplexing orthogonal frequency). OFDM relates to a technology for multicarrier transmission, designed for parallel data transmission using a large number of subcarriers, and is known as a technology with high efficiency and high frequency indicators reduce inter-symbol fields in conditions of multipath propagation and to significantly improve the transfer.

Currently we are studying the feasibility of TRANS�villas with frequency planning and frequency diversity for such a situation, when this technology is applied in OFDM downlink, and the data for multiple devices - mobile radio stations (hereinafter simply "mobile stations") are multiplexed in the frequency domain on the set of subcarriers (for example, see document 1, non-patent).

In the case of transmission with frequency planning device is a base station radio (hereinafter simply "base station") assigns subcarriers adaptive mobile stations on the basis of the quality of the signal received by the mobile stations for each band, so you can get the maximum effect of multiuser diversity and efficiently provide radio. Such transfer with frequency planning is a way that is acceptable for data transmission, mainly when the mobile station moves at a low speed. On the other hand, the transmission frequency planning requires return information about the quality of the received signal of the mobile stations, and therefore is not suitable for data transmission when the mobile station moves at a high speed. In addition, the frequency planning mainly carried out for each podology, which is obtained by separation of adjacent subcarriers into blocks, and therefore cannot provide very high frequency effect explode.

In the above-mentioned d�document 1 channel for the implementation of this transfer with frequency planning is called localized channel (hereinafter referred to "Lch"). Typically, the channels Lch administered in podpolnyh elements or elements from the set of subcarriers consecutive. In addition, in the General case of adaptive control, such as adaptive modulation, is performed on the channels Lch on popoloca (in frequency domain) and podkatom (time-domain). For example, to achieve the required error rate, the base station performs adaptive control scheme scheme (MCS modulation and coding) of the data symbols of the channel Lch, on the basis of information about the quality of the received signal returned by the mobile station.

In addition, in the above-mentioned document 1 shows an example where one frame (10 MS) is divided into 20 podkatov (one podcat = 0.5 MS), and one podcat includes six or seven OFDM symbols.

In contrast, when the transmission with frequency diversity, assign the data to the mobile stations, sub-carriers in a frequency band in a distributed manner, and it can provide a high effect of frequency diversity. In addition, the transmission frequency diversity does not require mobile stations information about the quality of the received signal, so it is an effective scheme in those circumstances in which it is difficult to apply the transmission with frequency planning, as described above. On the other hand, the transmission frequency of raznesenii�m is carried out regardless of the quality of the signal accept mobile stations, so I can't provide multiuser diversity as the transmission frequency planning. In the above-mentioned document 1 channel for the implementation of such transmission with frequency diversity, called distributed channel ("Dch"). Usually the Dch channels set in accordance with the schemes of frequency hopping (FH), which cover the entire band of the OFDM symbols in General.

Document 1, non-patent: R1-050604 "Downlink Channelization and Multiplexing for EUTRA" ("the Choice of channels and multiplexing in downlink for standard EUTRA") 3GPP TSG RAN WG1 Ad Hoc on LTE (Special message to standard LTE (Long Term Evolution) Working group 1 (WG1 Working Group 1) radio access networks (RAN, Radio Access Network) Group the development of the technical specifications (TSG Technical Specification Group) Project partnership for the development of third generation networks (3GPP, 3rd Generation Partnership Project), Sophia Antipolis (Sophia Antipolis, France, June 20-21, 2005.

Summary of the invention

The problem solved by the invention

In this case, in the above-mentioned document 1 Dch channels are set according to the diagrams frequency hopping, which cover the entire band of the OFDM symbols in General, to perform transmission with frequency planning and transmission with frequency diversity, at the same time, and therefore the symbols of the data channel Dch appoint popoloca, which�first designated channels Lch. As a result, when changes in the number of mobile stations that communicate with a base station, and changes the number of preset channels Dch, it changes the amount of resources for one channel Lch, i.e. the number of bits transmitted in one popoloca and one potcake using one channel Lch. That is, the block size coding for channel Lch varies in podkatom.

Thus, if the block size coding for channel Lch varies in podkatom, the encoding efficiency varies in podkatom, and error rate that can be achieved with a certain quality of the received signal, between podkatom. That is, when the channels Dch set according to the diagrams frequency hopping, which cover the entire band of the OFDM symbols in General, as described in the aforementioned document 1, changes in the number of preset channels Dch and thus change the characteristics of the BER (ber) channel Lch. As described above, adaptive management generally perform on podkatom on channels Lch, and therefore, when the number of preset channels Dch and characteristics of the BER channel Lch is changed, the base station need to change the attitude of conformity between the quality of the received signal and the MCS scheme in adaptive modulation on podkatom in accordance with changes in the nature�stick BER, what complicates adaptive control for channels Lch.

In addition, when the number of preset channels Dch is changed and the size of the block coding for channel Lch changes podkatom, the base station needs to inform the block size encoding every time the size is changed, the mobile station, which receives and decodes the data symbols of the channels Lch, which complicates the design of the communication system.

Thus, the present invention is to propose a way to specify papolos and the base station, which in the case of simultaneous implementation in the communication system with multi-carrier transmission with frequency planning and frequency diversity prevents the complication of adaptive control for the channel to implement transmission with frequency planning.

Problem solvers

The way to specify popolos according to the present invention includes the following steps: divide the set of subcarriers forming a multicarrier signal into a series popolos; and set in said multiple popolos first podology, including data for multiple devices - mobile radio stations, and second podology, including data only for a single device - a mobile station radio communication.

Benefits from the use of the Fig�"

According to the present invention, when the communication system with multiple carriers at the same time, realize transmission with frequency planning and transmission with frequency diversity, it is possible to prevent complication of adaptive control for the channel to implement transmission with frequency planning.

Brief description of the drawings

Fig.1 is a structural diagram illustrating a configuration of a base station corresponding to the Embodiment 1 of implementation of the present invention;

Fig.2 shows an example of the separation of podology according to the Embodiment 1 of implementation of the present invention;

Fig.3 shows an example of popolos according to the Embodiment 1 of implementation of the present invention (example 1 job);

Fig.4 shows an example of the job popolos according to the Embodiment 1 of implementation of the present invention (example 2 jobs);

Fig.5 shows an example of popolos according to the Embodiment 1 of implementation of the present invention (example 3 tasks);

Fig.6 shows an example of popolos according to the Embodiment 1 of implementation of the present invention (example 3 tasks);

Fig.7 shows an example of the job popolos according to the Embodiment 1 of implementation of the present invention (example 4 tasks);

Fig.8 shows an example of popolos according to the Embodiment 1 of implementation of the present invention (example 5 job);

nafig.9 shows an example of popolos according to the Embodiment 1 of implementation of the present invention (example 6 tasks);

Fig.10 shows an example of popolos according to the Embodiment 1 of implementation of the present invention (example 7 tasks);

Fig.11 is a structural diagram illustrating a configuration of a base station corresponding to Option 2 implementation of the present invention;

Fig.12 shows an example of the job popolos according to the Embodiment 2 of the implementation of the present invention;

Fig.13 shows the format of control information according to the Embodiment 2 of the implementation of the present invention;

Fig.14 is a structural diagram illustrating a configuration of a base station corresponding to Option 3 implementation of the present invention; and

Fig.15 shows an example of control of transmission power according to the Embodiment 3 of the implementation of the present invention.

Detailed description of preferred implementation options

Below with reference to the accompanying drawings will be described in detail options for the implementation of the present invention.

Option 1

Fig.1 shows the configuration of base station 100, the appropriate implementation of this embodiment of the present invention. Base station 100 is shared by lots of subcarriers forming an OFDM symbol, representing the multicarrier signal, to many papolos, and sets the Dch channel or channel Lch for each podporou in this set papolos.

The base station 100 includes�AET in the same number of sections 101-1 to 101-n coding and modulation containing section 11 of coding and modulating section 12 for the data channel Dch, sections 102-1 through 102-n encoding and modulating containing section 21 of coding and section 22 of modulation for the data channel Lch, and sections 115-1 to 115-n of the demodulation and decoding containing the demodulation section 31 and section 32 of decoding, and the number of mobile stations (MS) n, with which this base station 100 may exchange information.

In sections 101-1 to 101-n encoding and modulation section 11 coding perform processing associated with coding, for example, turbomotive data #1-#n Dch channel for each of the mobile stations #1-#n, and the modulating section 12 performs processing associated with the modulation coded data channel Dch, to generate the symbols of the data channel Dch.

In sections 102-1 through 102-n encoding and modulating sections 21 coding perform processing associated with coding, for example, turbomotive data #1-#n channel Lch for each of the mobile stations #1-#n, and section 22 of modulating perform processing associated with the modulation coded data channel Lch, for generating character data channel Lch. In this case, the encoding rate and modulation scheme is determined on the basis of information about the scheme MCS received from section 116 adaptive control.

Section 103 destinations�tion assigns the symbols of the data channel Dch and symbols of the data channel Lch subcarriers, which form the OFDM symbols according to the control information from the section 116 adaptive control, and displays the results in section 104 of multiplexing. With section 103 of destination shall designate respectively the symbols of the data channel Dch and symbols of the data channel Lch subcarriers on popoloca. That is, section 103 purpose assigns the symbols of the data channel Dch popoloca Dch channels and assigns the symbols of the data channel Lch popoloca channels Lch. Further, section 103 purpose displays information about the purpose of the symbols of the data channel Dch (i.e. information indicating the symbol of the data channel Dch for a mobile station assigned to a subcarrier), as well as information about the purpose of the symbols of the data channel Lch (i.e. information indicating the data symbol channel Lch for a mobile station assigned to a subcarrier) in section 105 of creating management information.

Section 105 of creating management information creates the control information comprising information about the purpose of the symbols of the data channel Dch, information about the purpose of the symbols of the data channel Lch and information about the scheme MCS received from section 116 adaptive direction, and outputs the control information to encoding section 106.

The encoding section 106 performs processing associated with coding of control information, and section 107 performs modulation processing, with�azanuy with modulation, for coded control information and outputs the result in section 104 multiplexing.

Section 104 multiplexing multiplexes the control information for the data symbols received from section 103 of the destination, and displays the results in section 108 perform IFFT (inverse fast Fourier transform, ABFP). Control information is multiplexed, for example, by podkatom. In addition, in this embodiment of the present invention, control information may be multiplexed either in time domain or in the frequency domain.

Section 108 execution performs IFFT inverse fast Fourier transform for the set of subcarriers assigned to control information and the data symbols, and generates OFDM symbols, representing a multicarrier signals.

Section 109 adding a cyclic prefix (CP) adds the same signal as the tail part of each OFDM symbol, in the head part of the OFDM symbol as a cyclic prefix.

Section 110 of the radio transmission performs such processing associated with the transmission, digital to analog (D/A (Digital to Analog) conversion, amplification and conversion with increasing frequency for OFDM symbols and the cyclic prefix, and sends the results at the antenna 111 to the mobile stations.

With other� side, section 112 of the radio reception takes n OFDM symbols transmitted at the same time mobile stations, the maximum number of which is n, using the antenna 111, and performs a processing associated with the reception, conversion with decreasing frequency and digital to analog conversion for these OFDM symbols.

Section 113 of removal of the cyclic prefix remove cyclic prefix of the OFDM symbols that have passed the above processing associated with the reception.

Section 114 perform FFT (Fast Fourier transform, BFN) performs fast Fourier transform for OFDM symbols, of which removed cyclic prefixes, and receives signals to each mobile station, which are multiplexed in the frequency domain. Mobile stations transmit signals using subcarriers or papolos, which are different for different mobile stations, and the signals of mobile stations includes information about the quality of the received signal for each popoloca reported by the mobile stations. A mobile station can measure the quality of the received signal for each popoloca using the adopted values of SNR (Signal-to-Noise Ratio - the ratio "signal/noise"), adopted by the values of the SIR (Signal-to-Interference Ratio - the ratio "signal/noise"), adopted by the values of SINR (Signal-to-Interference plus Noise Ratio - the ratio "signal/interference+noise"), mo�ness of the received signal, the interference power, the ber, bandwidth, MCS scheme, which provides a predetermined error rate, etc. additionally, information about the quality of the received signal may be referred to as "CQI (quality Indicator channel)", "CSI (channel state)", etc.

In sections 115-1 to 115-n of the demodulation and decoding by the demodulation unit 31 performs processing associated with demoduliruem, for signals passed FFT, and section 32 decodes perform processing associated with decoding, for demodulated signals. Due to this, receiving the received data. Information about the quality of the received signal for each popoloca, part of the received data, is introduced in section 116 of adaptive control.

Section 116 adaptive control adaptive control for the data channel Lch, on the basis of information about the quality of the received signal for each popoloca reported by the mobile stations. That is, the section 116 adaptive control scheme selects the MCS that ensures the required frequency of errors for each podology, and displays information about the scheme (MCS) based on the information about the quality of the received signal for each podology - sections 102-1 through 102-n encoding and modulation, and performs frequency scheduling to determine what�bearing assigned to data #1-#n channel Lch, on podoloski elements using the scheduling algorithm, for example, the method based on the maximum value of the SIR method and proportional fairness for section 103 of destination. Next section 116 adaptive control displays information about the scheme (MCS) for each podology in section 105 of creating management information.

Next will be described an example of a job popolos according to this embodiment implementation of the present invention. As shown in Fig.2 below as an example will be described a case where one OFDM symbol is formed by using subcarriers f1-f72and these subcarriers separated by equal intervals on podology (SB) from 1 to 12. Thus, one popoloca includes six subcarriers. In addition, one podcat includes six OFDM symbols. Moreover, although there will be described a case where the job papolos, described below, is performed in section 103 in advance, the present invention this situation is not limited and the setting popolos may vary for each podagra.

Example 1 job papolos (Fig.3)

In this example, as shown in Fig.3, podology 1, 4, 7 and 10 set as podology Dch channels, and podology 2, 3, 5, 6, 8, 9, 11 and 12 ask how podology Lch. That is, in popoloca from 1 to 12 podology channels Dch (podology, which posted only channel Dch) set� thus, they are located at uniform intervals from each other and arranged with periodic follow.

In this case, the frequency planning is carried out in podpolnyh elements for channel Lch, and as a result, each popoloca Lch includes character data channel Lch for only one mobile station. That is, one popoloca forms one channel Lch for one mobile station. In the example shown in Fig.3, is set to eight channels Lch - Lch1 on Lch8.

On the other hand, on the Dch channels should be a transfer with frequency diversity, so podology 1, 4, 7 and 10 of the Dch channels include symbols of the data channel Dch for multiple mobile stations. In the example shown in Fig.3, each popoloca channels Dch includes symbols of the data channel Dch for six mobile stations. That is, in each popoloca Dch channels multiple channels Dch for many mobile stations are multiplexed in the frequency domain. Therefore, in the example shown in Fig.3, each of the four popolos Dch channels forms the Dch channels 1 through 6 for the six mobile stations.

In this example, therefore, in the frequency domain multiplexed eight channels Lch and six channels Dch.

Thus, in this embodiment of the present invention, the Dch channels set in accordance with the schemes spasmodic rebuilt�s frequency, which cover the whole band (f1-f72of OFDM symbols, and instead asked in podpolnyh elements, and as a result, the symbols of the data channel Dch is not appointed popoloca channels Lch. Thus, even if changes in the number of mobile stations that communicate with the base station 100, and changes the number of jobs Dch channel, block size encoding for each channel Lch is maintained constant at the level of "one popoloca × one podcat". Therefore, according to this embodiment implementation of the present invention, when the simultaneous transmission with frequency planning on channels Lch and transmission with frequency diversity in the channel Dch is possible to prevent the complication of adaptive control for channels Lch. Furthermore, even if changes in the number of jobs Dch channel, block size encoding for each channel Lch is maintained constant at the level of "one popoloca × one podcat", and therefore there is no need to inform the block size coding mobile stations and to improve the design of the communication system.

Example 2 jobs papolos (Fig.4)

Transmission with frequency planning is not suitable for a mobile station moving at high speed, as described above, therefore, the base station 100 transmits data to a mobile station moving at high speed, used�using the Dch channels from the channel Lch and the Dch channels. In this example, the job number of jobs channel Dch changes in cells in accordance with the number of mobile stations moving at a high speed (mobile stations whose speed of movement exceeds the threshold value). That is, as shown in Fig.4, when the number of mobile stations moving at high speed, increases, increasing the number of jobs channel Dch. Fig.3 in the frequency domain multiplexed eight channels Lch and six channel Dch, while Fig.4 when setting popolos 1, 2, 4, 5, 7, 8, 10 and 11 as popolos Dch channels and tasks popolos 3, 6, 9 and 12 as popolos channels Lch - frequency domain multiplexed four channel Lch and the twelve channels Dch. Due to this increase in the number of mobile stations moving at high speed, can be increased, the number of mobile stations that the base station 100 can transmit data using the Dch channels.

Example 3 jobs papolos (Fig.5 and 6)

For many popolos from 1 to 12 in one OFDM symbol, when the spacing 41 between many popolos Dch channels containing the symbols of the data channel Dch transmitted to the same mobile station becomes smaller, increasing the number popolos Dch channels forming one channel Dch, and therefore becomes a high degree of frequency diversity. Therefore, in this example, channel CPE�e, where the delay spread in the channel is large, as in the macrocell (that is, high speed fading in the frequency domain in the channel and narrow coherent bandwidth of the channel) to obtain a high degree of frequency separation interval 41 is set small as shown in Fig.5. In a channel environment where the delay spread in the channel is small, as in the micro cell (that is, the low speed of fading in the frequency domain in the wide channel and the coherent bandwidth of the channel), less likely to provide frequency diversity, and therefore the interval 41 is set large, as shown in Fig.6. That is, in this example, when the delay spread in the channel becomes more, do less job interval of many popolos Dch channels containing the symbols of the data channel Dch for the same mobile station.

In addition, the amount of data channel Dch transmitted to the mobile stations with the use of one OFDM symbol are doing the same regardless of the size specified interval 41. Thus, when the interval 41 is set small as shown in Fig.5, reduces the number of subcarriers assigned to one mobile station in each popoloca Dch channels, and increases the number of mobile stations for which perform frequency division multiplexing. When the interval 41 is set large, as shown in Fig.6, the number n�dneasy, assigned to one mobile station in each popoloca Dch channels, and decreases the number of mobile stations for which perform frequency division multiplexing. More specifically, the number of mobile stations which carry out frequency division multiplexing in each popoloca Dch channels is six in the case of Fig.5, and three in the case of Fig.6. That is, in this example, when the delay spread in the channel becomes larger, the interval 41 doing less, and the number of mobile stations for which the frequency multiplexing is performed in each popoloca Dch channels increases.

Thus, in this example, when the delay spread in the channel is small, as shown in Fig.6, the interval 41 are doing great, and the number of mobile stations for which frequency multiplexing is performed in each popoloca Dch channels is reduced. Therefore, under this option the job when the delay spread in the channel is small (in the case of Fig.6), the number of Dch channels can be increased or decreased in the elements smaller than in the case where the delay spread in the channel is large (in the case of Fig.5). More specifically, in the case of Fig.5 Dch channels is necessary to increase or decrease at six pieces, while in the case of Fig.6 Dch channels can be increased or mind�nsiti on three pieces. Thus, according to this example, when the delay spread in the channel is small, the ratio between the number of channels Lch and the number of Dch channels can be set in a more flexible manner than in the case where the delay spread in the channel is large.

Example 4 job papolos (Fig.7)

Although the examples 1-3 job a lot of Dch channels multiplexed in the frequency domain in each popoloca Dch channels, in this example, as shown in Fig.7, a set of Dch channels multiplexed in the time domain in each popoloca Dch channels. That is, in this example, the tasks to a plurality of mobile stations in popoloca Dch channels allow time multiplexing. This makes it possible to obtain a frequency diversity in the channel Dch. In addition, the mobile station needs to perform processing associated with the reception of, for example FFT, only in the period allocated to this station, so you can reduce energy consumption by the mobile station. Furthermore, base station 100 transmits information about the purpose of the symbol data channel Dch earlier than other control information, such as information about the scheme (MCS) or undertaking a simple encoding of information about the purpose of the symbol data channel Dch to allow the mobile station to know before the period during which this mobile station�and dedicated channels Dch, and stop processing associated with the reception, before, whereby it is possible to further reduce the energy consumption of the mobile station.

Example 5 job papolos (Fig.8)

In this example, the job, in addition to the example 4 of reference (Fig.7), as more fully shown in Fig.8, the position where the Dch channels multiplexed in the time domain, defined in many different popolos Dch channels. That is, in this example, the job for many popolos channels Dch provision of a plurality of mobile stations for which perform temporal multiplexing, do differ. Through this channel Dch is possible to obtain the effect of diversity not only in the frequency domain, but also in the time domain. In addition, when before and after each podagra placed pilot signals, there are parts that are located close to the pilot signals and are characterized acceptable accuracy of channel estimation, and parts that are located far away from the pilot signals and are characterized by unacceptable accuracy of channel estimation in each popoloca, and therefore, when the positions where the Dch channels multiplexed in the time domain, which differ in many popolos Dch channels in this example, it is possible for Dch channels to align the accuracy of the estimated channels.

Example 6 job papolos (Fig.9)

In this p�the imera jobs as shown in Fig.9, the symbols of the data channel Dch intended mobile stations use frequency hopping in each popoloca Dch channels. This makes it possible to obtain the effect of diversity, protecting against fluctuations in the time domain and in the frequency domain, in popoloca Dch channels.

Example 7 job papolos (Fig.10)

In this example, as shown in Fig.10, the position where podology Dch channels specified in popoloca 1-12, change podkatom. This makes it possible to further improve the frequency diversity for channels Dch. In addition, according to this example, podology, characterized by high quality of the received signal in the mobile station, are not used continuously as the Dch channels. That is, podology characterized by low quality of the received signal in the mobile station, are not used continuously as channels Lch, whereby it is possible to improve the throughput of Lch.

The above-described examples 1-7 job popolos corresponding to this alternative implementation of the present invention.

Thus, according to this embodiment implementation of the present invention, when at the same time, realize transmission with frequency planning for channel Lch and the transmission with frequency diversity for channels Dch, Dch channels and Lch set by the subfield�himself, resulting in preventable complication of adaptive control for channels Lch. In addition, if the number of jobs of the Dch channel is changed, the size of the block encoding each channel Lch is maintained constant at the level of "one popoloca × one podcat", and as a result there is no need to inform the block size coding mobile stations. Further, podology Dch channels set at uniform intervals from each other and placed with periodic follow up, and so there is no need to provide information on the situation popolos Dch channels to the mobile stations. Therefore, according to this embodiment implementation of the present invention, the design of the communication system becomes easier.

In addition, do not necessarily constant intervals between podoloski Dch channels, and, if these intervals are set in advance, it is possible to achieve the above effects.

In addition, in the above description, although the assignment information for the symbols of the channel Dch and the assignment information for the symbols of the channel Lch comes from section 103 purpose in section 105 of creating management information, these types of information can enroll in section 105 of creating management information directly from section 116 of adaptive management. In this case, information about the scheme (MCS) information on the appointment for the symbols of the data channel Dch and inform�tion of appointment for the symbols of the data channel Lch comes from section 103 purpose in section 105 of creating management information.

Option 2

Base station corresponding to this alternative implementation of the present invention differs from Option 1 in that podology channels Dch made distinguished by the mobile stations in accordance with the level of delay spread in the channel for each mobile station.

The configuration of the base station 200 corresponding to this alternative implementation of the present invention shown in Fig.11. Fig.11 components, which are identical used in the Embodiment 1 (Fig.1) will be denoted by the same reference numbers without additional consideration.

In the base station 200 section 201 measuring the fluctuations of the channel receives the signal of each mobile station received by the section 114 perform the FFT. Section 201 of the measurement of fluctuations of the channel measures the fluctuations of the channel in the frequency domain for each mobile station, that is, measures the level of delay spread in the channel of each mobile station using a pilot signal included in the signal of each mobile station, and outputs the result in section 103 of destination.

Section 103 purpose assigns the symbols of the data channel Dch intended mobile stations, popoloca Dch channels in accordance with the level of delay spread in the channel of each mobile station, as described below.

That is, in this embodiment of the present izobreteny�, as shown in Fig.12, podology Dch channels are grouped in podology having a large gap 41 of the job, and podology having small interval 41 jobs. Namely, in one OFDM symbol set as podology Dch channels having a large interval of 41 job and podology Dch channels having small interval 41 of the job.

In addition, this interval 41 job the identical interval 41 of the job in example 3 jobs popolos Option 1. In addition, as in example 3 jobs papolos, in this embodiment of the present invention, the amount of data channel Dch transmitted to the mobile stations using a single OFDM symbol, is made constant regardless of the size of the interval 41 jobs. Therefore, as shown in Fig.12, in popoloca Dch channels having small interval 41 jobs, the number popolos Dch channels is large, and therefore, the number of subcarriers allocated to one mobile station is reduced, and the number of mobile stations for which perform frequency division multiplexing increases; at the same time, in popoloca Dch channels having a large gap 41 of the job, the number popolos Dch channels is small, and therefore, the number of subcarriers allocated to one mobile station is increased, and the number of mobile stations for which perform frequency division multiplexing decreases.

� popoloca 1-12 section 103 purpose assigns the symbols of the data channel Dch, designed a mobile station having a small delay spread in the channel, popoloca channels Dch (podology 1 and 7), which have an interval of 41 tasks, and assigns the symbols of the data channel Dch intended mobile station, having a large delay spread in the channel, popoloca channels Dch (podology 2, 5, 8 and 11), which have a small interval 41 jobs. In addition, section 103 of destination determines whether the delay spread in the channel big or small for each mobile station by comparing the magnitude of the scatter for each mobile station with the threshold value.

Thus, in this embodiment of the present invention are given a set popolos Dch channels that are suitable for channel environments of mobile stations, respectively, in one OFDM symbol, whereby it is possible to obtain the required and sufficient effect of frequency diversity for each mobile station.

Next will be described the format of control information corresponding to this implementation variant of the present invention. Section 105 of creating control information included in the base station 200, generates the control information in accordance with the format shown in Fig.13. In the case of the format shown in Fig.13, the mobile station identifier, which is the destination when s�reduce data symbols, set in the "MS-ID", classification information indicating the Dch channel or on the channel Lch, ask in the Classification channel, the number popolos channels Dch or the number popolos channels Lch set in the "Number popolos" and information about the scheme (MCS) for each podology set in the "MCS Information". In addition to this, in the "Classification of the channel can be specified intervals podoloski Dch channels in addition to the above classification information. For example, section 105 of creating control information can be selected and set in the "Classification of channel one of the following: "Lch", "Dch with intervals in two podology", "Dch with intervals of three podology" and "Dch, with intervals of six popolos".

The management information generated by the thus multiplexed in the time domain in the head part podagra section 104 multiplexing, as shown in Fig.12, and is transmitted to all mobile stations as control data channel SCCH (Shared control channel). That is, in this embodiment of the present invention, the job results popolos Dch channels and papolos channels Lch in popoloca 1 through 12 reported by mobile stations. Using one type of control information that has a common format for all mobile stations.

Thus, in this embodiment of the present invented�I, the job results popolos Dch channels and papolos channels Lch reported by mobile stations at the same time, using the control information having a format common to all mobile stations, as a result, even if the number of Dch channels and Lch changes podkatom, control information can be transmitted without the resources intended for use in the transmission of data symbols. In addition, use the same format of control information that are common to channels Dch and Lch, with the result that the design of the communication system becomes easier.

In this embodiment of the present invention, although the level fluctuations of the channel of each mobile station is measured in the base station 200, this level can be measured in each mobile station, and the measured result can be communicated to the base station 200.

In addition, you can also use the format of control information shown in Fig.13, in the Embodiment 1. In this case, the classification information indicating the Dch channel or on the channel Lch, ask in the "Classification of the channel.

Option 3

Base station corresponding to this alternative implementation of the present invention differs from the base station in the Embodiment 1 in that it controls the transmission power by popoloca.

Technologies to reduce mutual�x interference between cells include technology, called "interference Coordination". In the case of interference coordination base station of each cell coordinates the assignment of resources and coordinates the implementation of the control of transmission power, resulting in reduced mutual interference between cells. In this embodiment, the interference coordination is applied to Embodiment 1.

The configuration of base station 300 corresponding to this alternative implementation of the present invention shown in Fig.14. Fig.14 components that are identical to the used in the Embodiment 1 (Fig.1) will be denoted by the same reference numbers without additional consideration.

In the base station 300 section 301 of the control of transmission power controls the transmission power for the symbols of the data channel Dch and symbols of the data channel Lch on popoloca. More specifically, the base station 300 of cells that are neighboring control of transmission power, as shown in Fig.15. Namely, the base station 300 of the cell 1 specifies the following transmit power: high, medium, low, high, medium, low, etc., in order, starting with podology 1, popoloca from 1 to 12. Base station 300 cells following 2 sets transmission power: medium, low, high, medium, low, high, etc., in order, starting with podology 1, Podo�wasps from 1 to 12. Further, base station 300 cells following 3 sets transmission power: low, high, average, low, high, average, etc., in order, starting with podology 1, popoloca from 1 to 12. "High", "medium" and "low" power is defined as follows: for example, when the reference value (0 dB) set the transmit power is "medium", "high" transmit power is the transmit power is 5 dB above the reference value, and the low transmission power is the transmit power is 5 dB below the reference value. Thus, making the transmission power in the same popoloca, distinguished between cells, you can implement the interference coordination and to reduce mutual interference between cells.

In addition, usually the interference coordination must be implemented between the Dch channels or channels Lch, so you need to make the number of Dch channels and the number of channels Lch was similar between cells. In contrast, as described in Embodiment 1, when you ask podology Dch channels and podology channels Lch, even if the number of Dch channels and the number of channels Lch is set independently in each cell, you can implement the coordination of interference, as shown in Fig.15.

Further, typically, the interference coordination must be implemented between the Dch channels, and therefore, the power transmission Dch cannot be set to "high" in all cells, which are adjacent to each other. In contrast, if podology Dch channels set as described in Option 1, you can set the transmission power of the Dch channels "high" in all the neighboring cells, as shown in Fig.15.

The above-described options for the implementation of the present invention.

Though in relation to those options, the implementation of the present invention has been described a case where the signal received by the base station (that is, the signal transmitted by the mobile station on the uplink), is transmitted through the OFDM scheme, the signal can be transmitted using different transmission schemes, different from OFDM, for example, a circuit with a single carrier scheme and CDMA (Code Division Multiple Access - Multiple access code division multiplexing).

Furthermore, with regard to those options, the implementation of the present invention has been described a case where adaptive modulation is performed only on the channels Lch, adaptive modulation can be similarly carried out also on the Dch channels.

And yet, the channel Lch may be called a "Channel frequency planning", and the channel Dch may be called a "Channel frequency explode".

Moreover, the mobile station device is a base station and subcarriers can be described respectively as "User terminal (UE, User Equipment), "Node b" and "Tone". Further popoloca can be called as a "Subchannel", "Subcarrier block", "Block resources" or "data Portion". In addition, a cyclic prefix may be called "Defensive interval (GI)".

Further, although in relation to those options, the implementation of the present invention has been described a case where this invention is implemented using hardware, it can also be implemented using software.

Each functional block used for explaining the above-described variants of realization of the present invention may be typically implemented as LSI (LSI Large Scale Integration circuit - Large integrated circuit) formed by the IC chip. Such BIS may represent a separate crystals, either partially or completely, to be part of a single crystal. In this case, each functional block is described as BIS, but it can also be called IC (Integrated circuit), System LSI, Super LSI, Ultra LSI, depending on different degrees of integration.

Further, the method of integration schemes is not limited to the schemes BIS, also possible to implement with the use of specialized sets of electrical circuits or General-purpose processors. After the LSI is manufactured, you can also apply it as a logic chip, programmable in operating conditions (FPG), or a reconfigurable processor which can reconfigure connections and settings of circuit cells inside this BIS.

In addition, if the result of the development of semiconductor manufacturing technology or a derivative other technology, there will be a way of production of integrated circuits that replaces LSIS, of course, also possible to integrate the functional blocks on the basis of this method. You can also use biotechnology.

The basis for this patent application is application No. 2005-321110 in Japanese patent registered 4 November 2005, the full content of which is this obvious reference is incorporated into this description.

Industrial applicability

The present invention can be applied in mobile communication system and similar systems.

1. Integrated circuits for process control, comprising:
the appointment or the first block, which data to a mobile station assigned localised fat, or the second block, for which data for a mobile station assigned to distributed, each of the plurality of blocks into which the set of contiguous subcarriers in the frequency domain, and each of which consists of the same number of subcarriers; and
the transmission of control information, including information indicating m�mobile station, if first(s) block(s) or second blocks of this mobile station, and information indicating that the mobile station first(s) block(s) or second blocks that are assigned to this mobile station with a format common to the designated first(s) unit(s) and assigned to the second blocks, and data is transferred using a variety of blocks, each of which is assigned to the first block or the second block.

2. Integrated circuit according to claim 1, in which the first block and the second block is prescribed in units of podkatov and transmit control information for each podagra.

3. Integrated circuit according to claim 1, wherein the plurality of second blocks is prescribed so that the data assigned to a lot of second blocks are allocated with a predetermined interval in the frequency domain, and the resource size for the data in multiple second blocks is a constant with a predetermined interval.

4. Integrated circuit according to claim 1, in which the resource size for the data in the first block is the same as the resource size for the data in multiple second blocks.

5. Integrated circuit according to claim 1, in which data for a plurality of different mobile stations are multiplexed in a lot of second blocks, and the number of second blocks is the same as the number of multiplexed data.

6. Integrated circuit according to claim 1, in which �notesto second blocks so appointed, what data is assigned to a lot of second blocks are allocated with a predetermined interval in the frequency domain.

7. Integrated circuit according to claim 1, in which the first block or the second block variably prescribed for each set of blocks.

8. Integrated circuit according to claim 1, in which the first block or the second block variably prescribed for each podagra.

9. Integrated circuit according to claim 1, wherein the plurality of data for many different mobile stations are multiplexed in time in a lot of second blocks.

10. Integrated circuit according to claim 1, in which the set of second data blocks are assigned to different positions in the time domain.

11. Integrated circuit according to claim 1, in which MCS information (modulation scheme and coding), which includes the modulation scheme and encoding rate of the data transmitted to the mobile station.

12. Integrated circuit according to claim 1, in which the first blocks are used in the transmission frequency planning.

13. Integrated circuit according to claim 1, in which the second blocks are used in the transmission with frequency diversity.

14. Integrated circuits for process control, comprising:
receiving data transmitted from the base station, and or the first block, which data is assigned localised fat, or the second block, which data is assigned distributed, assigned to each of the multiple stacks�and blocks which are separated by a set of contiguous subcarriers in the frequency domain, and each of which consists of an equal number of subcarriers and
receiving control information including information indicating whether the first block or the second blocks, and information indicating the first block or the second block, which appointed, and control information transmitted from the base station with a format common to the designated first(s) unit(s) and assigned to the second block.

15. Integrated circuit according to claim 14, in which the first block and the second block are assigned in units of podkatov, and accept control information for each podagra.

16. Integrated circuit according to claim 14, wherein the plurality of second blocks are assigned so that the data assigned to a lot of second blocks that are distributed with a predetermined interval in the frequency domain, and the resource size for the data in multiple second blocks is a constant with a predetermined interval.

17. Integrated circuit according to claim 14, in which the resource size for the data in the first block is the same as the resource size for the data in multiple second blocks.

18. Integrated circuit according to claim 14, in which data for a plurality of different mobile stations are multiplexed in a lot of second blocks, and the number of second units to�s is the same, as the number of multiplexed data.

19. Integrated circuit according to claim 14, wherein the plurality of second blocks are assigned so that the data assigned to a lot of second blocks that are distributed with a predetermined interval in the frequency domain.

20. Integrated circuit according to claim 14, in which information MCS (modulation schemes and coding), which is transmitted from the base station, which includes the modulation scheme and encoding rate of the data.

21. Integrated circuit according to claim 14, further controls the process of measuring the quality of reception for each set of blocks.

 

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