JP2009060420A - Radio communication system, radio transmission apparatus, radio reception apparatus, program, and radio communication method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform DVRB mapping to allow the reception quality of each distributed virtual resource block DVRB to be equal. <P>SOLUTION: A radio transmission apparatus includes: a transmission diversity processing part for allowing a signal to be transmitted to each radio reception apparatus to be redundant, and generating a set of signals by redundancy; a multiplexing part for multiplexing the signals to a plurality of radio reception apparatuses, which are made to be redundant, to a physical resource block composed of a frequency band and a time band, which have predetermined widths, with the set of signals by redundancy as a unit; and a transmission part for transmitting the signal multiplexed by the multiplexing part. Each radio reception apparatus includes: a reception part for receiving the signals transmitted from the radio transmission apparatus; a multiplexing/separating part for extracting the signals to the radio reception apparatus from the signals multiplexed by the physical resource block out of the received signals, based on the arrangement order by the multiplexing part; and a transmission diversity synthesizing part for synthesizing the signals constituting the set of signals by redundancy out of the extracted signals, and generating the signal before redundancy. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a wireless communication system, a wireless transmission device, a wireless reception device, a program, and a wireless communication method, and more particularly, to a wireless communication system, a wireless transmission device, a wireless reception device, a program, and a wireless communication method using transmission diversity.

  As a third generation (3G) wireless access method for cellular mobile communication, W-CDMA (Wideband Code Division Multiple Access) is standardized in 3GPP (3rd Generation Partnership Project). The service is started. Further, 3G evolution (Evolved Universal Terrestrial Radio Access; hereinafter referred to as “EUTRA”) and 3G network evolution (Evolved Universal Terrestrial Radio Access Network) are being studied.

An OFDM (Orthogonal Frequency Division Multiplexing) system has been proposed as a downlink of EUTRA. In addition, as an uplink of EUTRA, a single carrier communication method of DFT (Discrete Fourier Transform) -Spread OFDM method has been proposed.
Here, the outline of the channel structure in EUTRA is shown in FIG. The base station device BS1 performs radio communication with the mobile station devices UE1, UE2, and UE3. The EUTRA downlink for radio communication from the base station device to the mobile station device includes a downlink pilot channel, a downlink synchronization channel, a broadcast channel, a downlink control channel, a downlink shared data channel, and a control format indicator channel. It is comprised by. In addition, the uplink of EUTRA is configured by an uplink pilot channel, a random access channel, an uplink control channel, and an uplink shared data channel.

  FIG. 2 is a schematic configuration of a downlink frame in EUTRA (Non-Patent Document 1). The horizontal axis represents the frequency domain, and the vertical axis represents the time domain. The downlink frame is a unit for radio resource allocation or the like, and includes a PRB (Physical Resource Block) composed of a frequency band and a time band having a predetermined width. One physical resource block PRB is composed of 12 subcarriers in the frequency domain, and is composed of 14 OFDM symbols in the time domain. The system bandwidth is a communication bandwidth of the base station device. In the time domain, there are a slot composed of 7 OFDM symbols, a subframe composed of 2 slots, and a radio frame composed of 10 subframes. A unit composed of one subcarrier and one OFDM symbol is called a resource element. In the downlink frame, a plurality of physical resource blocks PRB are arranged according to the system bandwidth.

  In each subframe, at least a downlink shared data channel used for data transmission and a downlink control channel used for control data transmission are arranged. The downlink pilot channel used for channel estimation of the downlink shared data channel and the downlink control channel is not shown, and the description of the arrangement will be described later. FIG. 2 shows a case where the downlink control channel is arranged in the first, second and third OFDM symbols of the subframe, and the downlink shared data channel is arranged in other OFDM symbols. The OFDM symbol in which the control channel is arranged varies in subframe units. Although not shown in FIG. 2, the control format indicator channel indicating the number of OFDM symbols constituting the downlink control channel is arranged in the first OFDM symbol, and the downlink control channel is arranged only in the first OFDM symbol. Or placed in the first and second OFDM symbols. Note that the downlink control channel and the downlink shared data channel are not arranged together in the same OFDM symbol. In the downlink control channel, a mobile station identifier or a mobile station group identifier, radio resource allocation information of the downlink shared data channel, multi-antenna related information, modulation scheme, coding rate, payload size, retransmission parameter, and the like are arranged.

  FIG. 3 is a diagram for explaining the arrangement of downlink pilot channels in one PRB in the downlink of EUTRA. In FIG. 3, the horizontal axis represents the time domain, and the vertical axis represents the frequency domain. Here, a case where the base station apparatus has four transmission antennas (transmission antenna 1, transmission antenna 2, transmission antenna 3, and transmission antenna 4) will be described. In FIG. 3, R1 represents a resource element of a downlink pilot channel transmitted by the transmission antenna 1, R2 represents a resource element of a downlink pilot channel transmitted by the transmission antenna 2, and R3 represents a downlink transmitted by the transmission antenna 3. The resource element of a pilot channel is represented, R4 represents the resource element of the downlink pilot channel which the transmission antenna 4 transmits. When the base station apparatus has only two transmission antennas, the downlink control channel is transmitted in resource elements R3 and R4 in the second OFDM symbol, and the downlink is transmitted in resource elements R3 and R4 in the ninth OFDM symbol. A link shared data channel is transmitted. Note that a base station apparatus having four transmission antennas can adaptively control the transmission of resources R3 and R4 in the time domain. That is, the base station apparatus arranges resource elements R3 and R4, which are downlink pilot channels, as described above in a certain subframe, and does not arrange resource elements R3 and R4 in a certain subframe. Only resource elements R1 and R2 are arranged.

In such a downlink, transmission diversity can be applied to the downlink control channel and the downlink shared data channel. SFBC (Space Frequency Block Code) as a transmission diversity system using two transmission antennas and SFBC + FSTD (Frequency Switched Transmit Diversity) as a transmission diversity system using four transmission antennas Application can be performed (Non-Patent Document 2, Non-Patent Document 3, Non-Patent Document 4). FIG. 4 is a diagram for explaining the transmission diversity method. FIG. 4A shows SFBC using two transmission antennas (Tx1, Tx2). Two transmission signals (s1, s2) and signals (s1 ^* , -s2 ^* ) obtained by performing code inversion and conjugate transposition for redundancy on the two transmission signals are assigned to each frequency domain, that is, each subcarrier ( Transmit from each transmitting antenna at f1, f2). FIG. 4B shows SFBC + FSTD using four transmission antennas (Tx1, Tx2, Tx3, Tx4). Four transmission signals (s1, s2, s3, s4) and signals (s1 ^* , -s2 ^* , s3 ^* , -s4 ^* ) obtained by inverting and conjugate-transposing the four transmission signals for redundancy Are transmitted from each transmitting antenna in each frequency domain (f1, f2, f3, f4). That is, the spatial frequency block code SFBC of the Tx1 and Tx3 pair and the spatial frequency block code SFBC of the Tx2 and Tx4 pair are performed, and each pair transmits in a different frequency region (f1 and f2, f3 and f4).

  The transmission signal of the downlink shared data channel subjected to transmission diversity coding in this way is arranged in each resource element. As an arrangement method for resource elements, it is possible to arrange with a frequency pair of spatial frequency block code SFBC (two frequencies) and a frequency set of SFBC + FSTD (four frequencies). That is, each resource element is sequentially paired with a frequency pair (2 resource elements) or a frequency set (4) from the frequency domain (subcarrier) in the first time domain (OFDM symbol) of the downlink shared data channel of the downlink subframe. When the transmission signal of the resource element) is arranged and arranged in all the resource elements in the frequency domain, it can be repeatedly arranged in order from the frequency domain of the resource element in the next time domain.

  FIG. 5 is a diagram for explaining an arrangement example of transmission signals of the spatial frequency block code SFBC using two transmission antennas in each resource element in one physical resource block PRB. In FIG. 5, for example, two resource elements D12-1 represent a transmission signal of frequency pair number 1 transmitted by antennas Tx1 and Tx2, and the transmission signal of f1 in FIG. 4A is arranged in one resource element. Then, the transmission signal of f2 in FIG. 4A is arranged in the other resource element. In this manner, SFBC frequency pairs are arranged in order from the first time domain resource element of the downlink shared data channel, and after being arranged in all resource elements, frequency pairs are arranged in order from the next time domain resource element. Place it again. As shown in FIG. 5, when the downlink control channel of the subframe is configured with 3 OFDM symbols, a total of 60 frequency pairs are arranged in one physical resource block PRB.

That is, one of the two resource elements D12-1 in FIG. 5 is arranged with the modulation symbols of the signals s1 and s2 in FIG. 4A of frequency pair number 1 and includes the modulation symbol of the signal s1. The OFDM symbol is transmitted by the antenna Tx1, and the OFDM symbol including the modulation symbol of the signal s2 is transmitted by the antenna Tx2. On the other hand, modulation symbols of signal -s2 ^* and s1 ^* of FIG. 4A of frequency pair number 1 are arranged, and an OFDM symbol including the modulation symbol of signal -s2 ^* is transmitted by antenna Tx1, and signal s1 ^An OFDM symbol including a modulation symbol of ^* is transmitted by the antenna Tx2. In the first of the next two resource elements D12-2 in FIG. 5, the modulation symbols of the signals s1 and s2 in FIG. 4A of frequency pair number 2 are arranged and include the modulation symbols of the signal s1. The OFDM symbol is transmitted by the antenna Tx1, and the OFDM symbol including the modulation symbol of the signal s2 is transmitted by the antenna Tx2. On the other hand, modulation symbols of signal -s2 ^* and s1 ^* of FIG. 4A of frequency pair number 2 are arranged, and an OFDM symbol including the modulation symbol of signal -s2 ^* is transmitted by antenna Tx1, and signal s1 ^An OFDM symbol including a modulation symbol of ^* is transmitted by the antenna Tx2.

  FIG. 6 is a diagram illustrating an arrangement example of SFBC + FSTD transmission signals using four transmission antennas in each resource element in one physical resource block PRB. In FIG. 6, for example, two resource elements D13-1 represent a transmission signal of frequency set number 1 of Tx1 and Tx3, and two resource elements D24-1 represent a transmission signal of frequency set number 1 of Tx2 and Tx4. To express. A transmission signal of frequency set number 1 is constituted by four signals obtained by adding these two resource elements D13-1 and two resource elements D24-1. Among the resource elements D13-1, the transmission signal f1 in FIG. 4B is arranged in one resource element, the transmission signal f2 in FIG. 4B is arranged in the other resource element, and the resource element D24 is arranged. 4, the transmission signal f3 in FIG. 4B is arranged in one resource element, and the transmission signal f4 in FIG. 4B is arranged in the other resource element.

That is, one of the two resource elements D13-1 in FIG. 6 is arranged with the modulation symbols of the signals s1 and s2 in FIG. 4B of frequency set number 1 and includes the modulation symbols of the signal s1. The OFDM symbol is transmitted by the antenna Tx1, and the OFDM symbol including the modulation symbol of the signal s2 is transmitted by the antenna Tx3. On the other hand, modulation symbols of signal -s2 ^* and s1 ^* of FIG. 4 (b) of frequency set number 1 are arranged, and an OFDM symbol including the modulation symbol of signal -s2 ^* is transmitted by antenna Tx1, and signal s1 ^An OFDM symbol including a modulation symbol of ^* is transmitted by the antenna Tx3. Among the next two resource elements D24-1 in FIG. 6, the modulation symbols of the signals s3 and s4 in FIG. 4B of frequency set number 1 are arranged, and include the modulation symbols of the signal s3 The OFDM symbol is transmitted by the antenna Tx2, and the OFDM symbol including the modulation symbol of the signal s4 is transmitted by the antenna Tx4. On the other hand, modulation symbols of the signals −s4 ^* and s3 ^* of FIG. 4B with frequency set number 1 are arranged, and an OFDM symbol including the modulation symbols of the signal −s4 ^* is transmitted by the antenna Tx2, and the signal s3 ^An OFDM symbol including a modulation symbol of ^* is transmitted by antenna Tx4.

In one of the next two resource elements D13-2 in FIG. 6, the modulation symbols of the signals s1 and s2 in FIG. 4B with the frequency set number 2 are arranged and include the modulation symbols of the signal s1. The OFDM symbol is transmitted by the antenna Tx1, and the OFDM symbol including the modulation symbol of the signal s2 is transmitted by the antenna Tx3. On the other hand, modulation symbols of the signals −s2 ^* and s1 ^* of FIG. 4B with frequency set number 2 are arranged, and an OFDM symbol including the modulation symbols of the signal −s2 ^* is transmitted by the antenna Tx1, and the signal s1 ^An OFDM symbol including a modulation symbol of ^* is transmitted by the antenna Tx3. In one of the next two resource elements D24-2 in FIG. 6, modulation symbols of the signals s3 and s4 in FIG. 4B of frequency set number 2 are arranged, and the modulation symbols of the signal s3 are included. The OFDM symbol is transmitted by the antenna Tx2, and the OFDM symbol including the modulation symbol of the signal s4 is transmitted by the antenna Tx4. On the other hand, modulation symbols of signal -s4 ^* and s3 ^* of FIG. 4 (b) with frequency set number 2 are arranged, and an OFDM symbol including the modulation symbol of signal -s4 ^* is transmitted by antenna Tx2, and signal s3 ^An OFDM symbol including a modulation symbol of ^* is transmitted by antenna Tx4.

  Thus, when four transmission antennas are used, SFBC + FSTD frequency sets are arranged in order from the first time domain resource element of the downlink shared data channel, and all of the time domain of the physical resource block PRB is allocated. Then, the frequency set is arranged again in order from the resource element in the next time domain. As shown in FIG. 6, when the downlink control channel of the subframe is configured with three OFDM symbols, a total of 29 frequency sets are arranged in one physical resource block PRB.

  In EUTRA, a plurality of transmission methods are being studied. A frequency at which the base station apparatus allocates radio resources in units of physical resource blocks PRB to mobile station apparatuses with good radio channel quality based on CQI (Channel Quality Indicator) fed back from the mobile station apparatus to the base station apparatus Performs frequency scheduling, such as centralized transmission (Localized transmission) mainly assuming the application of scheduling, mobile station devices that are moving at high speed, mobile station devices that periodically transmit and receive small amounts of data such as VoIP (Voice over Internet Protocol), etc. There are distributed transmissions mainly intended for application to mobile station apparatuses that do not. Centralized transmission is a method of performing transmission using subcarriers grouped in units of physical resource blocks PRB, and distributed transmission is a method of transmitting signals by distributing frequency resources in a finer unit than physical resource block PRB units over a wide band. Is the method.

  A transmission data unit of a mobile station apparatus that performs distributed transmission is called DVRB (Distributed Virtual Resource Block). A physical resource block PRB used for transmission of the distributed virtual resource block DVRB is referred to as a distributed physical resource block DPRB. The number of distributed virtual resource blocks DVRB multiplexed on one distributed physical resource block DPRB is referred to as a multiplexing number Nd. In EUTRA, the amount of physical resources used by one distributed virtual resource block DVRB can be made equal to one physical resource block PRB (Non-Patent Document 2). A time multiplexing method can be used as a multiplexing method of the distributed virtual resource block DVRB in the distributed physical resource block DPRB (hereinafter referred to as “distributed virtual resource block DVRB mapping”) (Non-patent Documents 5 and 6).

  FIG. 7 is a diagram for explaining an outline of a distributed virtual resource block DVRB mapping example using the time multiplexing method. Here, a case where the number of physical resource blocks PRB is 12 in the frequency domain will be described. FIG. 7A shows an example of distributed virtual resource block DVRB mapping when the number of distributed physical resource blocks DPRB is two and the number of multiplexing Nd is two. In FIG. 7A, the physical resource blocks PRB1 and PRB7 are used as the distributed physical resource blocks DPRB1 and DPRB2, the distributed virtual resource blocks DVRB1 and DVRB2 are time-multiplexed in the distributed physical resource blocks DPRB1 and DPRB2, and the distributed physical resource block The distributed virtual resource blocks DVRB1 and DVRB2 are time-multiplexed in a different order between DPRB1 and DPRB2.

  FIG. 7B shows an example of the distributed virtual resource block DVRB mapping when the number of distributed virtual resource blocks DPRB is three and the multiplexing number Nd is three. In FIG. 7B, the physical resource blocks PRB1, PRB5, and PRB9 are used as the distributed physical resource blocks DPRB1, DPRB2, and DPRB3, and the distributed virtual resource block DVRB1 and the distributed virtual resource block in each of the distributed physical resource blocks DPRB1, DPRB2, and DPRB3. DVRB2 and distributed virtual resource block DVRB3 are time-multiplexed, and distributed virtual resource blocks DVRB1 and DVRB2 are time-multiplexed in a different order among the distributed physical resource blocks DPRB1, DPRB2, and DPRB3.

FIG. 7C shows a case where the number of distributed physical resource blocks DPRB and the number of distributed virtual resource blocks DVRB are doubled compared to FIG. 7A. In FIG. 7C, physical resource blocks PRB1, PRB4, PRB7, and PRB10 are used as distributed physical resource blocks DPRB1, DPRB2, DPRB3, and DPRB4. The distributed physical resource blocks DPRB1 and DPRB2 time-multiplex the distributed virtual resource block DVRB1 and the distributed virtual resource block DVRB2, and the distributed physical resource blocks DPRB3 and DPRB4 time-multiplex the distributed virtual resource block DVRB3 and DVRB4. In the distributed virtual resource block DVRB mapping as described above, the DVRB number is notified from the base station apparatus to the mobile station apparatus, and the mobile station apparatus performs reception using the distributed virtual resource block DVRB of the notified DVRB number.
3GPP TS 36.211-v1.2.0 (2007-06), Physical Channels and Modulation (Release 8) 3GPP TSG RAN1 # 49, Kobe, Japan, 7-11 May, 2007 “Draft Report of 3GPP TSG RAN WG1 # 49 v0.4.0” 3GPP TSG RAN1 # 49bis, Orlando, Florida-USA, 25-29 June, 2007 "Draft Report of 3GPP TSG RAN WG1 # 49b v0.1.0" 3GPP TSG RAN1 # 49, Kobe, Japan, 7-11 May, 2007, R1-072239 “Performance of 4-Tx Antenna diversity with realistic channel estimation” 3GPP TSG RAN1 # 49 bis, Orlando, Florida-USA, 25-29 June, 2007, R1-072946 “RB-level Distributed Transformed Tunnel in Data Channel United TR” 3GPP TSG RAN1 # 49bis, Orlando, Florida-USA, 25-29 June, 2007, R1-072687 “E-UTRA DL Distributed Multiplexing and Mapping Rules: Performance”

  However, when the distributed virtual resource block DVRB is time-multiplexed as in the conventional SFBC + FSTD using four transmission antennas, the accuracy of the propagation path estimation differs depending on the resource element, so the reception quality of the distributed virtual resource block DVRB is There is a problem that it differs depending on the block and may not be equal. Hereinafter, this problem will be described. FIG. 8 is a diagram illustrating a case where the distributed virtual resource block DVRB of FIG. 7B is applied to a downlink frame to which SFBC + FSTD is applied. As can be seen from FIG. 8, in each distributed physical resource block DPRB, there is a distributed virtual resource block DVRB that is far in the time domain from resource elements R3 and R4, which are downlink pilot channels transmitted by antennas Tx3 and Tx4. .

  In FIG. 8, in the distributed physical resource block DPRB1, the distributed virtual resource blocks DVRB1 and DVRB3 are far from the resource elements R3 and R4 compared to the distributed virtual resource block DVRB2 (D13-11 to D24-20). Similarly, in the distributed physical resource block DPRB2, compared to the distributed virtual resource block DVRB1 (D13-11 to D24-20), the distributed virtual resource blocks DVRB2 and DVRB3 are far from the resource elements R3 and R4, and the distributed physical resource block In DPRB3, compared to DVRB3, the distributed virtual resource blocks DVRB1 and DVRB2 are far from the resource elements R3 and R4. As described above, in the resource element having a long distance from the resource elements R3 and R4, if the time variation of the propagation path is large, the propagation path estimation accuracy using the resource elements R3 and R4 deteriorates.

  Further, for example, in the distributed physical resource block DPRB1, the distributed virtual resource block DVRB1 uses the propagation path estimation value estimated from the second OFDM symbol and the ninth OFDM symbol to set the propagation path compensation value actually used for the propagation path compensation. It can be obtained by interpolation. However, since the distributed virtual resource block DVRB3 cannot perform the interpolation, the degradation of the propagation path estimation accuracy appears remarkably. In SFBC + FSTD using four transmission antennas, the received signal is demodulated using the propagation path estimation value estimated from the resource elements R3 and R4 on the receiving side, and therefore a deteriorated propagation path estimation value (propagation compensation value) If is used, the received signal cannot be demodulated correctly. Further, since the above-described distributed transmission is assumed to be used for a mobile station apparatus that moves at a high speed with a very large time fluctuation of the propagation path, degradation of the propagation path estimation accuracy is a very big problem.

  The present invention has been made in view of such circumstances, and a purpose thereof is a radio communication system, a radio transmission device, and a radio communication system capable of performing DVRB mapping so that reception quality of each distributed virtual resource block DVRB is equalized. A wireless receiver and a wireless communication method are provided.

  The present invention has been made to solve the above-described problems, and a wireless communication system according to the present invention includes a wireless transmission device and a plurality of wireless reception devices, and uses transmission diversity to transmit signals with redundancy. In the wireless communication system that performs communication, the wireless transmission device makes a signal transmitted to each wireless reception device redundant, a transmission diversity processing unit that generates a set of signals by redundancy, and a plurality of the wireless reception devices A multiplexing unit that multiplexes the redundant signal addressed to a physical resource block having a predetermined frequency band and time band in units of a set of signals by redundancy, and a signal multiplexed by the multiplexing unit A transmission unit that transmits the signal, the wireless reception device receiving a signal transmitted by the wireless transmission device, and the physical signal among the received signals. A demultiplexing unit for extracting a signal addressed to the wireless reception device from the signals multiplexed in the source block based on the order of arrangement by the multiplexing unit, and combining the signals constituting the signal set by the redundancy among the extracted signals And a transmission diversity combining unit that generates a signal before redundancy.

  The wireless communication system of the present invention is the above-described wireless communication system, wherein the multiplexing unit of the wireless transmission device includes the wireless reception device that is the destination of the redundant signal in the physical resource block. The redundant signals are arranged and multiplexed so as to be repeated in the same order.

  The wireless communication system of the present invention is the above-described wireless communication system, wherein the multiplexing unit of the wireless transmission device includes the wireless reception device that is the destination of the redundant signal in the physical resource block. The redundant signals are arranged and multiplexed so as to be repeated in a different order for each repetition.

  The wireless communication system of the present invention is any one of the wireless communication systems described above, wherein the multiplexing unit arranges and multiplexes the redundant signals so that the order is different for each physical resource block. It is characterized by.

  The radio communication system according to the present invention is any one of the radio communication systems described above, wherein a control data signal is multiplexed in the physical resource block, and the transmission unit of the radio transmission device is configured to receive the one reception signal. Information indicating the amount of control data signal multiplexed in the physical resource block in the device, and information indicating the number of the receiving device that is the destination of the redundant signal multiplexed in the physical resource block; And a parameter including at least information indicating an identification number of the one receiving device in the receiving device group serving as the destination, and the demultiplexing unit of the wireless receiving device transmits the physical signal among the received signals. The arrangement order of the signals in the resource block is determined based on the parameters, and the signal addressed to the wireless reception device is extracted from the physical resource block And wherein the door.

  Also, the wireless communication system of the present invention is any one of the wireless communication systems described above, wherein the signal redundancy by the transmission diversity processing unit is a first frequency at which a first signal is transmitted from a first antenna. And a second frequency at which the second signal is transmitted from the first antenna, and a signal obtained by converting the second signal for redundancy is transmitted from the first antenna. And a signal obtained by converting the first signal for redundancy is assigned to the second frequency transmitted from the second antenna, and the set of signals resulting from the redundancy includes the first signal and the signal It is a set comprising a second signal, a signal obtained by converting the first signal, and a signal obtained by converting the second signal.

  Also, the wireless communication system of the present invention is any one of the wireless communication systems described above, wherein the signal redundancy by the transmission diversity processing unit is a first frequency at which a first signal is transmitted from a first antenna. And a second frequency at which the second signal is transmitted from the first antenna, and a signal obtained by converting the second signal for redundancy is transmitted from the first antenna. To the second frequency transmitted from the second antenna, and the third signal transmitted from the third antenna. And the fourth signal is assigned to the third frequency transmitted from the fourth antenna, and the signal obtained by converting the fourth signal for redundancy is transmitted from the third antenna. Zhou A signal obtained by converting the third signal for redundancy is assigned to the fourth frequency transmitted from the fourth antenna, and the set of signals resulting from the redundancy includes the first signal and The second signal, the signal converted from the first signal, the signal converted from the second signal, the third signal, the fourth signal, the signal converted from the third signal, and the first signal 4 is a set including a signal obtained by converting the signal 4.

  The wireless communication system of the present invention is any one of the wireless communication systems described above, wherein the transmission unit of the wireless transmission device transmits an OFDM signal, and the reception unit of the wireless reception device is an OFDM method. It is characterized by receiving the signal.

  In addition, the wireless transmission device of the present invention, in a wireless transmission device that communicates with a plurality of wireless reception devices using transmission diversity to transmit signals redundantly, redundant signals to be transmitted to each of the wireless reception devices, A transmission diversity processing unit that generates a set of signals by redundancy, and the redundant signals addressed to a plurality of the wireless reception devices, into physical resource blocks having a frequency band and a time band of a predetermined width, A multiplexing unit that multiplexes a set of signals by redundancy as a unit and a transmission unit that transmits a signal multiplexed by the multiplexing unit are provided.

  In addition, the program of the present invention provides a computer having a wireless transmission device that communicates with a plurality of wireless reception devices by using transmission diversity for redundant signal transmission, and redundantly transmits a signal to be transmitted to each of the wireless reception devices. A transmission diversity processing unit that generates a set of signals by redundancy, the redundant signal addressed to a plurality of the wireless reception devices into a physical resource block consisting of a frequency band and a time band of a predetermined width, A program for functioning as a multiplexing unit that multiplexes a set of signals by the redundancy as a unit and a transmission unit that transmits a signal multiplexed by the multiplexing unit.

  Further, the wireless reception device of the present invention is a wireless reception device that communicates with a wireless transmission device using transmission diversity in which signals are transmitted in a redundant manner, and a reception unit that receives a signal transmitted by the wireless transmission device; Demultiplexing that extracts a signal addressed to the radio receiving device from signals multiplexed in a physical resource block having a frequency band and a time zone of a predetermined width among the received signals based on an arrangement order by the radio transmitting device. And a diversity diversity combining unit that combines the signals constituting the set of signals by redundancy among the extracted signals and generates a signal before the redundancy.

  In addition, the program of the present invention includes a reception unit that receives a signal transmitted by the wireless transmission device, and includes a computer included in the wireless reception device that communicates with the wireless transmission device using transmission diversity in which signals are transmitted in redundancy. Multiplexing for extracting a signal addressed to the radio receiving apparatus from the signals multiplexed in a physical resource block having a predetermined frequency band and time band among the received signals based on the order of arrangement by the radio transmitting apparatus. The separation unit synthesizes signals constituting a set of signals by redundancy among the extracted signals, and functions as a transmission diversity combining unit that generates a signal before the redundancy.

  The wireless communication method of the present invention is a wireless communication method in a wireless communication system that includes a wireless transmission device and a plurality of wireless reception devices, and performs communication using transmission diversity for redundant signal transmission. A first process in which a wireless transmission device makes a signal transmitted to each wireless reception device redundant and generates a set of signals by redundancy; and the wireless transmission device is addressed to a plurality of wireless reception devices A second step of multiplexing the redundant signal into a physical resource block having a frequency band and a time band of a predetermined width in units of the set of signals by the redundancy; and A third process in which a multiplexing unit transmits a multiplexed signal; a fourth process in which the radio reception apparatus receives a signal transmitted by the radio transmission apparatus; and a radio reception apparatus that receives the received signal. A fifth step of extracting a signal addressed to the wireless reception device from a signal multiplexed on the physical resource block based on an arrangement order of the second step, and the wireless reception device A wireless communication method comprising: a sixth step of generating signals before redundancy by synthesizing signals constituting a set of signals by redundancy.

  According to the present invention, a signal to be transmitted to a wireless reception device is made redundant, a set of signals by redundancy is generated, and a redundant signal to a plurality of wireless reception devices is converted into a set of signals by redundancy. Since multiplexing is performed on the physical resource block as a unit, DVRB mapping can be performed so that the reception quality of the distributed virtual resource block DVRB becomes uniform.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The radio communication system according to the present embodiment is a base station apparatus 1 that is a radio transmission apparatus that transmits by SFBC + FSTD using four transmission antennas, and a radio reception apparatus that receives a signal transmitted by the base station apparatus 1. And a plurality of mobile station apparatuses 2. FIG. 9 is a schematic block diagram of the base station apparatus 1 in the embodiment of the present invention. As shown in FIG. 9, the base station apparatus 1 includes a radio resource control unit 3, a control unit 4, a transmission processing unit 5, and a reception processing unit 6.

  The radio resource control unit 3 manages intermittent transmission / reception cycles with the mobile station apparatus 2, modulation scheme / coding rate, transmission power, radio resource allocation, the number of OFDM symbols constituting the downlink control channel, multiplexing, etc. Control information for instructing the contents is output to the control unit 4, and is notified as control data to the mobile station apparatus 2 through the control unit 4 and the transmission processing unit 5. The control unit 4 outputs a control signal to the transmission processing unit 5 and the reception processing unit 6 in order to control the transmission processing unit 5 and the reception processing unit 6 based on the control information input from the radio resource control unit 3. . The control unit 4 controls the transmission processing unit 5 and the reception processing unit 6 such as the modulation scheme of transmission / reception signals, the setting of the coding rate, the setting of the number of OFDM symbols included in the downlink control channel, the setting of the allocation to the resource elements To do. In addition, the control unit 4 generates L1 / L2 control data (Layer1 / Layer2 control data) that is control data arranged in the downlink control channel, and instructs the transmission processing unit 5 to perform transmission. Further, the control unit 4 generates control data to be arranged in the downlink shared data channel instead of the downlink control channel, and instructs the transmission processing unit 5 to perform transmission as data together with information data.

  The transmission processing unit 5 generates a downlink control channel, a downlink shared data channel, a downlink pilot channel, and a control format indicator channel based on the input from the control unit 4, and a plurality of, for example, four transmission antennas a1 to a4. Is transmitted to each mobile station apparatus 2 via. In addition, since there is no direct relation with this invention, the description regarding a broadcast channel and a downlink synchronization channel is abbreviate | omitted. Based on the input from the control unit 4, the reception processing unit 6 receives the uplink control channel, the uplink shared data channel, the uplink pilot channel, and the random access channel transmitted from each mobile station apparatus 2 via the reception antenna a5. Do it. In addition, since it is not directly related to the present invention, description on the uplink is omitted.

  FIG. 10 is a schematic block diagram illustrating an internal configuration of the transmission processing unit 5 of the base station apparatus 1 in the present embodiment. The transmission processing unit 5 of the base station apparatus 1 includes a plurality of data channel processing units 10, a control channel processing unit 11, a reference signal generation unit 12, a control format indicator signal generation unit 13, a multiplexing unit 14, and a transmission antenna. For each IFFT (Inverse Fast Fourier Transform) unit 15, GI (Guard Interval) insertion unit 16, D / A (digital / analog conversion) unit 17, and transmission RF (Radio Frequency; Radio frequency) unit 18. Since the plurality of data channel processing units 10 have the same configuration and function, one of them will be described as a representative.

  The data channel processing unit 10 performs processing of the downlink shared data channel, that is, each data channel processing unit 10 receives information data addressed to any one of the mobile station devices 2 and transmits the data addressed to the mobile station device 2 Generate a signal of the distributed virtual resource block. The data channel processing unit 10 includes a turbo coding unit 20, a data modulation unit 21, and a transmission diversity processing unit 22. The control channel processing unit 11 performs processing on the downlink control channel. The control channel processing unit 11 includes a convolutional coding unit 30, a QPSK modulation unit 31, and a transmission diversity processing unit 32.

Each of the plurality of data channel processing units 10 performs baseband processing for transmitting data composed of information data and control data input from the control unit 4 by the OFDM method. The turbo coding unit 20 performs error correction coding using a turbo code for increasing the error tolerance of the input data in accordance with the coding rate instruction from the control unit 4. The data modulation unit 21 is a QPSK (Quadrature Phase Shift Keying), 16QAM (16 Quadrature Amplitude Modulation), 64QAM (64 Quadrature Amplitude Modulation), etc. The data that has been subjected to error correction coding by the turbo coding unit 20 is modulated by a modulation method instructed by the control unit 4 among the modulation methods. In this embodiment, AMCS (Adaptive Modulation Coding Scheme) is used, so that this modulation scheme is changed as appropriate. The transmission diversity processing unit 22 makes a signal to be transmitted to each mobile station device 2 redundant by generating a signal sn ^* by inverting and sign transposing the signal sn modulated by the data modulation unit 21. The transmission diversity processing unit 22 generates frequency pairs (s1, s2, s1 ^* , -s2 ^* ) for performing SFBC processing in the case of transmission diversity using two transmission antennas, as a set of signals by redundancy. In the case of transmission diversity using a transmission antenna, a frequency set (s1, s2, s1 ^* , -s2 ^* , s3, s4, s3 ^* , -s4 ^* ) for performing SFBC + FSTD processing is generated.

  The control channel processing unit 11 performs baseband processing for transmitting L1 / L2 control data by the OFDM method. The convolutional code unit 30 performs error correction coding using a convolutional code for increasing the error resistance of the L1 / L2 control data input from the control unit 4. The QPSK modulation unit 31 modulates the L1 / L2 control data that has been subjected to error correction coding by the convolutional coding unit 30 using the QPSK modulation method. Similar to the transmission diversity processing unit 22, the transmission diversity processing unit 32 generates a frequency pair that is a set of transmission signals for 2 subcarriers × 2 transmission antennas for performing SFBC processing in the case of transmission diversity using two transmission antennas. In the case of transmission diversity using four transmission antennas, a frequency set that is a set of transmission signals for 4 subcarriers × 4 transmission antennas for performing SFBC + FSTD processing is generated.

  The reference signal generation unit 12 generates a reference signal transmitted by each transmission antenna of the base station apparatus 1 using the downlink pilot channel. The control format indicator signal generation unit 13 generates a control format indicator signal for transmitting information indicating the OFDM signal formed by the downlink control channel through the control format indicator channel. The multiplexing unit 14 outputs a transmission signal of information data addressed to each mobile station apparatus 2 processed for encoding and modulation output from the data channel processing unit 10 and encoding and modulation output from the control channel processing unit 11. The processed L1 / L2 control data transmission signal, control format indicator signal, and reference signal are arranged in the resource element. At the time of distributed transmission targeted by the present invention, a set of redundant signals generated by the transmission diversity processing unit 22 is multiplexed on a distributed physical resource block DPRB, which is a physical resource block PRB for distributed transmission. A description of signal allocation to the resource elements of the downlink shared data channel by this multiplexing will be given later.

  The IFFT unit 15 performs fast inverse Fourier transform on the signal input from the multiplexing unit 14 to perform OFDM modulation. The GI insertion unit 16 generates a symbol in the OFDM scheme by adding a guard interval to the OFDM-modulated signal. The guard interval is obtained by a known method of duplicating a part of the beginning or end of a symbol to be transmitted. The D / A unit 17 converts the baseband digital signal input from the GI insertion unit 16 into an analog signal. The transmission RF unit 18 generates an in-phase component and a quadrature component of the intermediate frequency from the analog signal input from the D / A unit 17, removes an extra frequency component with respect to the intermediate frequency band, and converts the intermediate frequency signal to a high frequency. The signal is converted (up-converted) into the above signal, excess frequency components are removed, power amplification is performed, and the signal is output to one of the transmission antennas a1 to a4. In the present embodiment, the IFFT unit 15, the GI insertion unit 16, the D / A unit 17, and the transmission RF unit 18 function as a transmission unit. The base station apparatus 1 includes this transmission unit as many as the number of transmission antennas a1 to a4 used for transmission, that is, four in the present embodiment, and each transmission unit transmits each transmission antenna a1 output from the multiplexing unit 14. Process the signal for ~ a4.

  FIG. 11 is a schematic block diagram of the mobile station apparatus 2 in the embodiment of the present invention. As illustrated in FIG. 11, the mobile station device 2 includes a control unit 7, a transmission processing unit 8, and a reception processing unit 9. The reception processing unit 9 performs reception processing on the downlink control channel, the downlink shared data channel, the downlink pilot channel, and the control format indicator channel received from the base station apparatus 1 via the reception antenna a6. The control unit 7 controls the transmission processing unit 8 and the reception processing unit 9 based on the control data notified from the base station apparatus 1 using the downlink control channel and the downlink shared data channel. Further, the control unit 7 is based on control information (value of multiplexing number Nd, frequency allocation of distributed physical resource block DPRB, distributed virtual resource block DVRB number) and control format indicator related to DVRB mapping notified from the base station apparatus 1. A resource element in which a signal distributed and transmitted to the mobile station apparatus is arranged is detected, and a control signal for extracting the received signal is output to the reception processing unit 9. A method for detecting a resource element in which a signal distributed and transmitted to its own mobile station apparatus is arranged will be described later.

  FIG. 12 is a schematic block diagram showing an internal configuration of the reception processing unit 9 of the mobile station apparatus 2 in the present embodiment. The reception processing unit 9 of the mobile station apparatus 2 includes a reception RF unit 40, an A / D unit 41, a GI removal unit 42, an FFT unit 43, a demultiplexing unit 44, a propagation path estimation unit 45, a propagation path Compensators 46, 47, 48, control format indicator detector 55, transmission diversity combiners 49, 52, data demodulator 50, turbo decoder 51, QPSK demodulator 53, and Viterbi decoder 54 It has. In the present embodiment, the reception RF unit 40, the A / D unit 41, the GI removal unit 42, and the FFT unit 43 function as a reception unit.

  The reception RF unit 40 amplifies the signal received via the reception antenna a6, converts it to an intermediate frequency (down-conversion), removes unnecessary frequency components, and sets the amplification level so that the signal level is properly maintained. Control and perform quadrature demodulation based on the in-phase and quadrature components of the received signal. The A / D unit 41 converts the analog signal orthogonally demodulated by the reception RF unit 40 into a digital signal. The GI removal unit 42 removes a portion corresponding to the guard interval from the digital signal output from the A / D unit 41. The FFT unit 43 performs fast Fourier transform on the signal input from the GI removal unit 42 and performs demodulation of the OFDM method.

  Based on an instruction from the control unit 7, the demultiplexing unit 44 performs a downlink pilot channel (pilot channel), a control format indicator channel, a downlink from a signal Fourier-transformed by the FFT unit 43, that is, a received signal demodulated by the OFDM method. A shared data channel (data channel) and a downlink control channel (control channel) are extracted from the arranged resource elements and output. Specifically, the demultiplexing unit 44 extracts the downlink pilot channel and the control format indicator channel having a fixed arrangement, outputs the downlink pilot channel to the propagation path estimation unit 45, and the control format indicator channel is propagated. Output to the path compensation unit 46. Further, the demultiplexing unit 44 extracts the downlink control channel based on the information included in the control format indicator channel, and outputs it to the propagation path compensation unit 48. Further, the demultiplexing unit 44 extracts a downlink shared data channel based on information included in the downlink control channel, and outputs the downlink shared data channel to the propagation path compensation unit 47. The demultiplexing unit 44 performs the distributed transmission based on the downlink shared data channel, that is, the signal multiplexed on the downlink shared data channel of the distributed physical resource block DPRB, based on the signal arrangement order by the multiplexing unit 14 of the base station apparatus 1. A signal addressed to the mobile station apparatus 2 is extracted. This extraction method (resource element detection method) will be described later.

  The propagation path estimation unit 45 estimates the propagation path fluctuation for each of the transmission antennas a1 to a4 of the base station apparatus 1 based on the reception result of the known reference signal arranged in the downlink pilot channel separated by the demultiplexing unit 44. The propagation path fluctuation compensation value is output. The propagation path compensation units 46, 47, and 48 compensate for propagation path fluctuation of the input signal based on the propagation path fluctuation compensation value from the propagation path estimation section 45. The control format indicator detection unit 55 detects control format indicator information indicating the number of OFDM symbols constituting the downlink control channel from the signal arranged in the control format indicator channel in which propagation path fluctuation compensation has been performed, and performs control. Output to unit 7. The transmission diversity combining sections 49 and 52 combine the signals constituting the signal set by the redundancy in the base station apparatus 1 with respect to the signals for which the propagation path compensation section 47 or 48 has compensated for the propagation path fluctuations, before the redundancy. Generate a signal. The combining at this time is performed according to the transmission diversity method used in the base station apparatus 1.

The combining process by the transmission diversity combining units 49 and 52 will be described. However, SFBC + FSTD only performs two SFBCs with different frequency pairs, that is, in the case of SFBC + FSTD, the synthesis process in the case of SFBC is only repeated twice, so the SFBC synthesis process will be described. In addition, the code | symbol of FIG. 3, FIG.4 (b) is used for description suitably. The received signal of frequency f1 is r1, and the received signal of frequency f2 is r2.
Alamouti synthesis is performed as SFBC synthesis for each of the SFBCs of the pair of transmission antennas Tx1 and Tx3 and the pair of transmission antennas Tx2 and Tx4. Here, as described above, alamouti synthesis for the SFBC of the pair of the transmitting antennas Tx1 and Tx3 (for details, see SM Alamouti, “A Simple Transmit Diversity Technology for Coin 98”, JE Vol.16 No.8) will be described.

First, a propagation path estimation value H1 for the transmission signal of the transmission antenna Tx1 is obtained from the downlink pilot channel R1, and a propagation path estimation value H3 for the transmission signal of the transmission antenna Tx3 is obtained from the downlink pilot channel R3. Next, the conjugate transposition H1 ^* of the propagation path estimation value H1 and the received signal r1 are multiplied, the propagation path estimation value H3 and the conjugate transposition r2 ^* of the reception signal r2 are multiplied, and both results are added together to synthesize for s1 A signal c1 is obtained. Next, the conjugate transposition H3 ^* of the propagation path estimation value H3 is multiplied by the reception signal r1, the sign inversion (−H1) of the propagation path estimation value H1 and the conjugate transposition r2 ^* of the reception signal r2 are multiplied, and both results are obtained. Addition is performed to obtain a composite signal c2 of s2. As a result, c1 and c2 are signals obtained by squaring the amplitudes of the propagation path estimation value H1 and the propagation path estimation value H3, respectively, and are signals obtained by weighting and combining each of s1 and s2. Improve.
Note that in order to perform the Alamout synthesis, which is a linear process with a simple calculation, and obtain optimum characteristics, the propagation path fluctuations at the frequencies f1 and f2 need to be the same. Therefore, SFBC is performed by a pair of resource elements adjacent to each other at the frequency with the closest propagation path fluctuation.

  The data demodulation unit 50 demodulates the downlink shared data channel combined by the transmission diversity combining unit 49. This demodulation is performed corresponding to the modulation method used in the data modulation unit 21 of the base station apparatus 1, and information on the modulation method is instructed from the control unit 7. The turbo decoding unit 51 decodes the downlink shared data channel demodulated by the data demodulation unit 50. This decoding is performed corresponding to the coding rate used in the turbo coding unit of the base station apparatus 1, and information on the coding rate is instructed from the control unit 7. The QPSK demodulation unit 53 performs QPSK demodulation of the downlink control channel combined by the transmission diversity combining unit 52. The Viterbi decoder unit 54 decodes the downlink control channel demodulated by the QPSK demodulation unit 53.

  Next, a downlink shared data channel that performs distributed transmission using SFBC + FSTD using four transmission antennas, that is, a method for arranging downlink shared data channels that are transmitted using the distributed virtual resource block DVRB, in resource elements, that is, DVRB The mapping will be described. The multiplexing unit 14 of the base station apparatus 1 arranges resource elements using this arrangement method. Also, the demultiplexing unit 44 of the mobile station apparatus 2 determines a channel, that is, a resource element of each distributed virtual resource block DVRB based on this arrangement method, and extracts a signal.

  The DVRB mapping of the present invention uses the SFBC + FSTD frequency set as one unit and distributes the downlink shared data channel signals of each distributed virtual resource block DVRB multiplexed to one distributed physical resource block DPRB in units of distributed physical resource blocks. Place in DPRB. The cycle to be arranged in order is a multiplexing number Nd that is the number of distributed virtual resource blocks DVRB multiplexed to one distributed physical resource block DPRB, and signals from the first distributed virtual resource block DVRB1 to the Ndth distributed virtual resource block DVRB Nd That is, after the SFBC + FSTD frequency sets are sequentially arranged one by one, the process of arranging again from the signal of the first distributed virtual resource block DVRB1 is repeated until the arrangement of all frequency sets is completed. Furthermore, the order of the distributed virtual resource blocks DVRB arranged between the respective distributed physical resource blocks DPRB is shifted. As a result, the order of the distributed virtual resource block DVRB is different for each distributed physical resource block.

  FIG. 13 is a diagram for explaining DVRB mapping when the downlink control channel is composed of three OFDM symbols and the multiplexing number Nd is two. That is, a distributed virtual resource block DVRB1 composed of a signal addressed to the first mobile station apparatus 2 and a distributed virtual resource block DVRB2 composed of a signal addressed to the second mobile station apparatus 2 are distributed to the distributed physical resource blocks DPRB1 and DPRB2. It is a figure explaining the mapping by the multiplexing part 14 of the base station apparatus 1. FIG. At the same time, the demultiplexing unit 44 of the mobile station apparatus 2 extracts the distributed virtual resource block DVRB addressed to the mobile station apparatus 2 based on the mapping contents. The same applies to FIGS. 14, 16, 17, 19, 20, and 22.

  Also in the present embodiment, as in the case of conventional EUTRA, the downlink frame is a unit for radio resource allocation or the like, and is composed of physical resource blocks PRB having a predetermined frequency band and time band. One physical resource block PRB is composed of 12 subcarriers in the frequency domain, and is composed of 14 OFDM symbols in the time domain. A unit composed of one subcarrier and one OFDM symbol is called a resource element. As shown in FIG. 13, the downlink control channel is composed of 3 OFDM symbols, and the downlink pilot channel is 1, 4, 5, 7, 10th subcarrier of 1, 2, 5, 8, 9, 12th OFDM symbol. 29, 29 frequency sets of SFBC + FSTD are configured in each physical resource block PRB. Then, in the distributed physical resource block DPRB1, 2n-1 (n = 1,... 15) th of the SFBC + FSTD frequency set, and 2n-1 (n = 1,... 15) of the frequency set of the distributed virtual resource block DVRB1. ) Th signal is arranged in order. In the distributed physical resource block DPRB1, the 2n (n = 1,... 14) th signal of the SFBC + FSTD frequency set and the 2n (n = 1,... 14) th signal of the frequency set of the distributed virtual resource block DVRB2. Are arranged in order. Here, 2n-1 (n = 1,... 15) and 2n (n = 1,... 14) are frequency set numbers.

  On the other hand, in the distributed physical resource block DPRB2, the order of the distributed virtual resource block DVRB in which signals are arranged in the frequency set is shifted from the case of the distributed physical resource block DPRB1. In the distributed physical resource block DPRB2, the 2n-1 (n = 1,... 15) th of the SFBC + FSTD frequency set and the 2n-1 (n = 1,... 15) th of the frequency set of the distributed virtual resource block DVRB2. Are arranged in order. In the distributed physical resource block DPRB2, the 2n (n = 1,... 14) th of the SFBC + FSTD frequency set and the 2n (n = 1,... 14) th of the SFBC + FSTD frequency set of the distributed virtual resource block DVRB1. Are arranged in order. Each of the distributed virtual resource blocks DVRB1 and DVRB2 is composed of 29 SFBC + FSTD frequency sets in total by the distributed physical resource blocks DPRB1 and DPRB2, and is equal to the resource element amount of one physical resource block PRB.

  Although the frequency set number of the SFBC + FSTD frequency set in the distributed physical resource block DPRB and the frequency set number of the frequency set of the distributed virtual resource block DVRB are shown here, they may be different. For example, the frequency set m of the distributed virtual resource block DVRB1 composed of the 29n SFBC + FSTD frequency sets in the 2n-1 (n = 1,... 15) th of the SFBC + FSTD frequency sets of the distributed physical resource block DPRB1. The (m = 1,... 15) th signal is arranged in order, and in the distributed physical resource block DPRB2, 2n (n = 1,... 14) th of the SFBC + FSTD frequency set, the distributed virtual resource block DVRB1 The m (m = 16,... 29) -th signal of the frequency set may be arranged in order.

  FIG. 14 is a diagram for explaining DVRB mapping when the downlink control channel is composed of three OFDM symbols and the multiplexing number Nd is 3. That is, a distributed virtual resource block DVRB1 composed of a signal addressed to the first mobile station apparatus 2, a distributed virtual resource block DVRB2 composed of a signal addressed to the second mobile station apparatus 2, and a signal addressed to the third mobile station apparatus 2 It is a figure explaining the mapping to distributed physical resource block DPRB1, DPRB2, DPRB3 with distributed virtual resource block DVRB3 which consists of. Similarly to FIG. 13, in FIG. 14, 29 frequency sets of SFBC + FSTD are configured in each physical resource block PRB. In the distributed physical resource block DPRB1, the 3n-2 (n = 1,... 10) th of the SFBC + FSTD frequency set and the 3n-2 (n = 1,... 10) th of the frequency set of the distributed virtual resource block DVRB1 Are arranged in order. In the distributed physical resource block DPRB1, 3n-1 (n = 1,... 10) th of the SFBC + FSTD frequency set, and 3n-1 (n = 1,... 10) of the frequency set of the distributed virtual resource block DVRB2. ) Th signal is arranged in order. In the distributed physical resource block DPRB1, the 3n (n = 1,... 9) th signal of the SFBC + FSTD frequency set and the 3n (n = 1,... 9) th signal of the frequency set of the distributed virtual resource block DVRB3. Are arranged in order.

  On the other hand, in the distributed physical resource blocks DPRB2 and DPRB3, the order of the distributed virtual resource block DVRB in which signals are arranged in the frequency set is shifted by one compared to the distributed physical resource blocks DPRB1 and DPRB2. That is, in the distributed physical resource block DPRB1, the frequency sets are arranged in the order of the distributed virtual resources DVRB1, DVRB2, and DVRB3. However, in the distributed physical resource block DPRB2, the frequency sets are set in the order of the distributed virtual resources DVRB2, DVRB3, and DVRB1. In the distributed physical resource block DPRB3, frequency sets are arranged in the order of the distributed virtual resources DVRB3, DVRB1, and DVRB2.

  In the distributed physical resource block DPRB2, the distributed virtual resource block DVRB2 is the 3n-2 (n = 1,... 10) th frequency in the order of 3n-2 (n = 1,... 10) of the SFBC + FSTD frequency set. A set of signals is arranged, and the distributed virtual resource block DVRB3 is the 3n-1 (n = 1,... 10) th in order of the 3n-1 (n = 1,... 10) th of the SFBC + FSTD frequency set. Frequency set signals are arranged, and the distributed virtual resource block DVRB1 is the 3n (n = 1,... 9) th frequency set in order of the 3n (n = 1,... 9) th frequency set of SFBC + FSTD. A signal is placed.

  Further, in the distributed physical resource block DPRB3, the order of the distributed virtual resource DVRB in which signals are arranged in the frequency set as described above is shifted by one compared to the distributed physical resource block DPRB2. Here, the distributed virtual resource block DVRB is shifted so as to be in an order different from the order in the distributed physical resource block DPRB1. In the distributed physical resource block DPRB3, in the distributed virtual resource block DVRB3, signals are arranged in order 3n-2 (n = 1,... 10) of the SFBC + FSTD frequency set, and DVRB1 is 3n-1 (SFBC + FSTD frequency set). n = 1,... 10) th, signals are arranged in order, and distributed virtual resource block DVRB2 is arranged in order 3n (n = 1,.. .9) th in the SFBC + FSTD frequency set. In the distributed virtual resource blocks DVRB1, DVRB2, and DVRB3, the distributed physical resource blocks DPRB1, DPRB2, and DPRB3 together constitute a frequency set of 29 SFBC + FSTDs, which is equal to the resource element amount of 1PRB.

  Next, a case where the downlink control channel is composed of two OFDM symbols will be described. FIG. 15 is a diagram for explaining the arrangement of SFBC + FSTD frequency sets for the downlink shared data channel when the downlink control channel is composed of two OFDM symbols. In this case, the downlink pilot channel is arranged in the same manner as when the downlink control channel is configured by 3 OFDM symbols, and 32 frequency sets of SFBC + FSTD are configured in each physical resource block PRB.

  FIG. 16 is a diagram for explaining DVRB mapping when the downlink control channel is composed of 2 OFDM symbols and the multiplexing number Nd is 2. In the distributed physical resource block DPRB1, the distributed virtual resource block DVRB1 is the 2n-1 (n = 1,... 16) th in the SFBC + FSTD frequency set, and the 2n-1 (n = 1,... 16) th in order. In the distributed virtual resource block DVRB2, the 2n (n = 1,... 16) th signal in the SFBC + FSTD frequency set and the 2n (n = 1,. Be placed. On the other hand, in the distributed physical resource block DPRB2, the order of the distributed virtual resource block DVRB in which signals are arranged in the frequency set is shifted. In the distributed physical resource block DPRB2, the distributed virtual resource block DVRB2 is the 2n-1 (n = 1,... 16) th in the SFBC + FSTD frequency set, and the 2n-1 (n = 1,... 16) th in order. Frequency set signals are arranged, and the distributed virtual resource block DVRB1 is the 2n (n = 1,... 16) th frequency set of the SFBC + FSTD frequency set, and the 2n (n = 1,... 16) th frequency set in order. Are arranged. The distributed virtual resource blocks DVRB1 and DVRB2 are each composed of the distributed physical resource blocks DPRB1 and DPRB2 to form a frequency set of 32 SFBC + FSTDs, and are equal to the resource element amount of one physical resource block PRB.

  FIG. 17 is a diagram for explaining DVRB mapping when the downlink control channel is composed of two OFDM symbols and the multiplexing number Nd is 3. In the distributed physical resource block DPRB1, the distributed virtual resource block DVRB1 is the 3n-2 (n = 1,... 11) th in the SFBC + FSTD frequency set, and the 3n-2 (n = 1,... 11) th in order. Frequency set signals are arranged, and the distributed virtual resource block DVRB2 is 3n-1 (n = 1,... 11) th in the SFBC + FSTD frequency set, and 3n-1 (n = 1,... 11) in order. The signal of the frequency set is arranged, and the distributed virtual resource block DVRB3 is the 3n (n = 1,... 10) th in the SFBC + FSTD frequency set, and the 3n (n = 1,... 10) th in order. A signal is placed.

  On the other hand, in the distributed physical resource block DPRB2, the order of the distributed virtual resource block DVRB in which signals are arranged in the frequency set is shifted by one compared to the distributed physical resource block DPRB1. In the distributed physical resource block DPRB2, the distributed virtual resource block DVRB2 is the 3n-2 (n = 1,... 11) th in the SFBC + FSTD frequency set, and the 3n-2 (n = 1,... 11) th in order. Frequency set signals are arranged, and the distributed virtual resource block DVRB3 is 3n-1 (n = 1,... 11) th of the SFBC + FSTD frequency set, and 3n-1 (n = 1,... 11) in order. The distributed virtual resource block DVRB1 is assigned to the 3n (n = 1,... 10) th frequency set of the SFBC + FSTD frequency set and the 3n (n = 1,... 10) th frequency set in order. A signal is placed.

  Further, in the distributed physical resource block DPRB3, the order of the distributed virtual resource block DVRB in which signals are arranged in the frequency set is shifted by one compared to the distributed physical resource block DPRB2. Here, the distributed virtual resource block DVRB is shifted so as to be different from the same order as the distributed physical resource block DPRB1. In the distributed physical resource block DPRB3, the distributed virtual resource block DVRB3 is the 3n-2 (n = 1,... 11) th in the SFBC + FSTD frequency set, and the 3n-2 (n = 1,... 11) th in order. Frequency set signals are arranged, and the distributed virtual resource block DVRB1 is 3n-1 (n = 1,... 11) th in the SFBC + FSTD frequency set, and 3n-1 (n = 1,... 11) in order. The signal of the frequency set is arranged, and the distributed virtual resource block DVRB2 is the 3n (n = 1,... 10) th in the SFBC + FSTD frequency set, and the 3n (n = 1,... 10) th in order. Frequency set signals are arranged. In the distributed virtual resource blocks DVRB1, DVRB2, and DVRB3, the distributed physical resource blocks DPRB1, DPRB2, and DPRB3 collectively constitute a frequency set of 32 SFBC + FSTDs, which is equal to the resource element amount of one physical resource block PRB.

  Next, a case where the downlink control channel is composed of one OFDM symbol will be described. FIG. 18 is a diagram for explaining the arrangement of SFBC + FSTD frequency sets for the downlink shared data channel. In this case, 34 frequency sets of SFBC + FSTD are configured in each physical resource block PRB.

  FIG. 19 is a diagram for explaining DVRB mapping when the downlink control channel is composed of one OFDM symbol and the multiplexing number Nd is 2. In the distributed physical resource block DPRB1, the distributed virtual resource block DVRB1 is the 2n-1 (n = 1,... 17) th in the SFBC + FSTD frequency set, and the 2n-1 (n = 1,... 17) th in order. Frequency set signals are arranged, and the distributed virtual resource block DVRB2 is the 2n (n = 1,... 17) th frequency set of the SFBC + FSTD frequency set, and the 2n (n = 1,... 17) th frequency set in order. Are arranged.

  On the other hand, in the distributed physical resource block DPRB2, the order of the distributed virtual resource block DVRB in which signals are arranged in the frequency set is shifted. In the distributed physical resource block DPRB2, the distributed virtual resource block DVRB2 is the 2n-1 (n = 1,... 17) th in the SFBC + FSTD frequency set, and the 2n-1 (n = 1,. Frequency set signals are arranged, and the distributed virtual resource block DVRB1 is the 2n (n = 1,... 17) th frequency set in the SFBC + FSTD frequency set, and the 2n (n = 1,... 17) th frequency set in order. Are arranged. Each of the distributed virtual resource blocks DVRB1 and DVRB2 is composed of 34 SFBC + FSTD frequency sets in total by the distributed physical resource blocks DPRB1 and DPRB2, and is equal to the resource element amount of one physical resource block PRB.

  FIG. 20 is a diagram for explaining DVRB mapping when the downlink control channel is composed of one OFDM symbol and the multiplexing number Nd is 3. In the distributed physical resource block DPRB1, the distributed virtual resource block DVRB1 is the 3n-2 (n = 1,... 12) th in the SFBC + FSTD frequency set, and the 3n-2 (n = 1,. Frequency set signals are arranged, and the distributed virtual resource block DVRB2 is 3n-1 (n = 1,... 11) th in the SFBC + FSTD frequency set, and 3n-1 (n = 1,... 11) in order. The signal of the frequency set is arranged, and the distributed virtual resource block DVRB3 is the 3n (n = 1,... 11) th in the SFBC + FSTD frequency set, and the 3n (n = 1,... 11) th in order. Frequency set signals are arranged.

  On the other hand, in the distributed physical resource block DPRB2, the order of the distributed virtual resource block DVRB in which signals are arranged at the position of each frequency set is shifted by one compared with the order in the distributed physical resource block DPRB1. In the distributed physical resource block DPRB2, the distributed virtual resource block DVRB2 is the 3n-2 (n = 1,... 12) th in the SFBC + FSTD frequency set, and the 3n-2 (n = 1,. Frequency set signals are arranged, and the distributed virtual resource block DVRB3 is 3n-1 (n = 1,... 11) th of the SFBC + FSTD frequency set, and 3n-1 (n = 1,... 11) in order. The signal of the frequency set is arranged, and the distributed virtual resource block DVRB1 is the 3n (n = 1,... 11) th in the SFBC + FSTD frequency set, and the 3n (n = 1,... 11) th in order. Frequency set signals are arranged.

  Further, in the distributed physical resource block DPRB3, the order of the distributed virtual resource block DVRB in which signals are arranged in the frequency set is shifted by one compared to the distributed physical virtual block DPRB2. Here, the order of the distributed virtual resource block DVRB is shifted so as to be different from the order in the distributed physical resource block DPRB1. In the distributed physical resource block DPRB3, the distributed virtual resource block DVRB3 is the 3n-2 (n = 1,... 12) th in the SFBC + FSTD frequency set, and the 3n-2 (n = 1,. Frequency set signals are arranged, and the distributed virtual resource block DVRB1 is 3n-1 (n = 1,... 11) th in the SFBC + FSTD frequency set, and 3n-1 (n = 1,... 11) in order. The signal of the frequency set is arranged, and the distributed virtual resource block DVRB2 is the 3n (n = 1,... 11) th in the SFBC + FSTD frequency set, and the 3n (n = 1,... 11) th in order. Frequency set signals are arranged. The distributed virtual resource blocks DVRB1, DVRB2, and DVRB3 are each composed of 34 SFBC + FSTD frequency sets in total by the distributed physical virtual resource blocks DPRB1, DPRB2, and DPRB3, and are equal to the resource element amount of one physical resource block PRB.

  Next, in the wireless communication system that performs the DVRB mapping described above, a procedure for recognizing the resource element in which the downlink shared data channel allocated to the mobile station apparatus 2 is allocated to the mobile station apparatus will be described. FIG. 21 is a diagram for explaining a procedure for recognizing, from a subframe, a downlink shared data channel assigned to the mobile station device, that is, a resource element in which the distributed virtual resource block DVRB is allocated, to the mobile station device 2. . The mobile station device 2 uses the downlink shared data channel to determine the number of distributed physical resource blocks DPRB, the frequency position of the distributed physical resource block DPRB, the value of the multiplexing number Nd, and the DVRB number to which the downlink shared data channel addressed to itself is assigned. Receive. The downlink shared data channel used for this control data notification is not concentrated transmission but concentrated transmission.

  The base station apparatus 1 sets the distributed physical resource block DPRB number, the frequency position of the distributed physical resource block DPRB, and the multiplex number Nd, which are parameters for distributed communication, to a specific mobile station apparatus 2 or a plurality of mobile station apparatuses 2. On the other hand, it transmits on the downlink shared data channel. Specifically, when these parameters for distributed communication are transmitted to a specific mobile station apparatus 2, the mobile station apparatus 2 specific to the downlink control channel including information such as radio resource allocation of the downlink shared data channel is transmitted. Is transmitted, including the parameters for distributed communication in the downlink shared data channel indicated in the radio resource allocation. Further, when transmitting parameters for distributed communication to a plurality of mobile station apparatuses 2, a mobile station indicating the plurality of mobile station apparatuses 2 in a downlink control channel including information such as radio resource allocation of a downlink shared data channel It transmits including the group identifier, and transmits the downlink shared data channel indicated in the radio resource allocation including the parameters for distributed communication. The mobile station apparatus 2 detects whether the mobile station identifier included in the downlink control channel is equal to the own mobile station identifier or whether the mobile station group identifier is equal to the mobile station group identifier to which the own mobile station apparatus belongs.

  If equal, obtain radio link resource allocation information of the downlink shared data channel included in the downlink control channel, demodulate the downlink shared data channel of the physical resource block PRB indicated by the radio resource allocation information, A parameter for distributed communication included in the downlink shared data channel is detected. When a mobile station group identifier is used, a plurality of mobile station apparatuses belonging to the mobile station group identifier commonly use distributed communication parameters included in the downlink shared data channel for distributed transmission. In addition to the number of distributed physical resource blocks DPRB, the frequency allocation of the distributed physical resource blocks DPRB, and the value of the multiplexed Nd, the base station apparatus 1 specifies a DVRB number as a parameter for distributed communication and a distributed virtual specified by the DVRB number. It transmits with the downlink shared data channel with respect to the specific mobile station apparatus 2 used as the transmission destination of a resource block.

  Notification of these distributed communication parameters from the base station apparatus 1 to the mobile station apparatus 2 is performed at the stage of communication establishment before the mobile station apparatus 2 starts communication of information data, and at this stage, communication of information data is performed. Is notified that distributed transmission will be performed. Alternatively, these pieces of information only indicate information used for distributed transmission, and information specifying whether to perform distributed transmission or centralized transmission at the stage of actual information data communication is used for the downlink control channel. May be included. After communication is established, the mobile station apparatus 2 sends the parameter to the signal addressed to the mobile station apparatus, that is, to the mobile station apparatus when the mobile station apparatus 2 indicates distributed transmission on the downlink control channel in actual information data communication. This is used for recognizing resource elements in which distributed virtual resource blocks DVRB are arranged.

  The mobile station apparatus 2 recognizes the number of distributed physical resource blocks DPRB in the downlink frame based on the information on the number of distributed physical resource blocks DPRB (S1). Next, the mobile station apparatus 2 recognizes which physical resource block PRB is the distributed physical resource block DPRB based on the information on the frequency position of the distributed physical resource block DPRB (S2). The mobile station apparatus 2 recognizes the number of distributed virtual resource blocks DVRB to be multiplexed in the distributed physical resource block DPRB based on the information on the multiplexing number Nd (S3). The mobile station apparatus 2 recognizes the number of the distributed virtual resource block DVRB assigned to the own mobile station apparatus in the distributed physical resource block DPRB based on the DVRB number information (S4).

  After the communication is established, the mobile station apparatus 2 receives the control format indicator through the control format indicator channel, and recognizes the number of OFDM symbols constituting the downlink control channel (S5). Based on the above information, a resource element in which a signal distributed and transmitted to the mobile station apparatus in the subframe is arranged is recognized (S6). For example, the type of DVRB mapping shown in FIGS. 13, 14, 16, 17, 19, and 20 as a whole is recognized by the multiplex number Nd and the control format indicator, and finally each type moves automatically. The signal of the station apparatus, that is, the resource element in which the distributed virtual resource block DVRB is arranged is recognized by the information of the signal arrangement order of each type stored in advance and the DVRB number.

  Note that DPRB count, DPRB frequency position, Nd, and DVRB number may be configured in a downlink control channel instead of a downlink shared data channel. Note that the number of DPRBs and the frequency positions of DPRBs may be previously associated with each other in a one-to-one manner, and only the number of DPRBs may be notified. The DPRB count and Nd may be the same, and only one of the information may be notified. When the DVRB number is configured in the downlink control channel, the bit indicating the information related to the concentrated transmission in the downlink control channel is determined in advance to change the meaning when indicating the distributed transmission to indicate the DVRB number. A bit may be diverted.

  As described above, since the signals of each distributed virtual resource block DVRB are evenly distributed in the time domain within the distributed physical resource block DPRB, the reception quality of each distributed virtual resource block DVRB can be equalized. Furthermore, the mobile station apparatus 2 can recognize the resource element in which the downlink shared data channel of the mobile station apparatus is arranged without additional control data.

  Further, the order of the distributed virtual resource blocks DVRB is shifted so that the order becomes different for each repetition cycle in which the distributed virtual resource blocks DVRB are arranged in order. FIG. 22 shows that when the downlink control channel is composed of 3 OFDM symbols and the multiplexing number Nd is 3, the order of the distributed virtual resource blocks DVRB is shifted for each period in which the frequency sets of the distributed virtual resource blocks DVRB are arranged in order. It is a figure explaining DVRB mapping. In the distributed physical resource block DPRB1, in the first three SFBC + FSTD frequency sets, frequency set signals are arranged in the downlink shared data channel in the order of the distributed virtual resource blocks DVRB1, DVRB2, and DVRB3. In the next three SFBC + FSTD frequency sets, the order of the distributed virtual resource blocks DVRB is shifted by one, and the signals of the frequency sets are arranged in the downlink shared data channel in the order of the distributed virtual resource blocks DVRB2, DVRB3, DVRB1. In the next three SFBC + FSTD frequency sets, the order of the distributed virtual resource block DVRB is shifted by 1, and the signals of the frequency set are arranged in the downlink shared data channel in the order of the distributed virtual resource blocks DVRB3, DVRB1, and DVRB2.

  Such processing is performed for the subsequent SFBC + FSTD frequency set. In the distributed physical resource blocks DPRB2 and DPRB3, the order of the frequency set of the distributed virtual resource block DVRB with respect to the frequency set of the first SFBC + FSTD is different, but similarly, the frequency set of the distributed virtual resource block DVRB is distributed every cycle. The order of the virtual resource block DVRB is shifted.

  As described above, in the DVRB mapping shown in FIG. 22, the resource elements in which the signals of the distributed virtual resource blocks DVRB are arranged can be separated in the frequency domain as compared with the DVRB mapping shown in FIG. As a result, it is possible to obtain a frequency diversity effect, and it is also possible to obtain an interference diversity effect that disperses the influence so that the interference is not continuously received when there is strong interference from a neighboring cell in a specific frequency region.

  In addition, by performing the process of shifting the order of the distributed virtual resource block DVRB for each period in which the frequency sets of the distributed virtual resource block DVRB are sequentially arranged, the signal of the distributed virtual resource block DVRB is conversely in a specific frequency region. If the resource elements are concentrated (depending on the number of OFDM symbols and the number of multiplexing Nd of the downlink control channel), the shift may not be performed. At this time, whether or not the order of the distributed virtual resource block DVRB is shifted for each period in which the distributed virtual resource blocks DVRB are arranged in order is determined for the combination of the number of OFDM symbols and the number of multiplexing Nd of the downlink control channel. By determining in advance, since the mobile station device can determine whether or not to perform shift without transmitting control information designating whether or not to perform shift from the base station device, control data increases. It does not put pressure on the transmission capacity.

  Also, the present invention can be applied to DVRB mapping to which SFBC using two transmission antennas is applied, and reception quality between distributed virtual resource blocks can be made equal. In this case, the SFBC frequency pair is set as one unit, and the downlink shared data channel signal of each distributed virtual resource block DVRB is sequentially arranged in units. As in the case of four transmission antennas, the period in which the transmission antennas are arranged in sequence is a multiplexing number Nd that is the number of distributed virtual resource blocks DVRB multiplexed to one distributed physical resource block DPRB, and is from the first distributed virtual resource block DVRB1. After arranging the signals of one SFBC frequency pair of each Nd-th distributed virtual resource block DVRB Nd in order, the process of arranging again from the signal of the first distributed virtual resource block DVRB1 is performed for all frequency pairs. The process is repeated until the placement is completed, and the order of the distributed virtual resource blocks DVRB to be placed is shifted between the distributed physical resource blocks DPRB.

In the above embodiment, the case where the value of the multiplexing number Nd is 2 and 3 has been described, but the present invention is not limited to these values. The value of the multiplexing number Nd may be other values such as 4, 6.
In the above-described embodiment, as shown in FIG. 4 (b), in FIG. 3, a pair of transmission antennas Tx1 and Tx3 that transmit downlink pilot channels R1 and R3, and transmission that transmits downlink pilot channels R2 and R4 are transmitted. The case where the SFBC + FSTD SFBC processing is performed with each of the antenna Tx2 and Tx4 pairs has been described. However, when the SFBC + FSTD SFBC processing is performed with each of the transmission antenna Tx1, Tx2 pair, the transmission antenna Tx3, Tx4 pair, and the transmission antenna Tx1. The present invention can also be applied to a case where SFBC + FSTD SFBC processing is respectively performed with a pair of Tx4 and a pair of transmitting antennas Tx2 and Tx3. In addition, SFBC processing of SFBC + FSTD is performed with a pair of transmission antennas Tx1 and Tx3 in a certain OFDM symbol, and a pair of transmission antennas Tx1 and Tx2, and a pair of transmission antennas Tx3 and Tx4 in a different OFDM symbol. The present invention can also be applied to a case where SFBC + FSTDs of different transmission antenna pairs are combined so that SFBC + FSTD processing of SFBC + FSTD is performed.

  9 for realizing the functions of the radio resource control unit 3, the control unit 4, the transmission processing unit 5, the reception processing unit 6, and the control unit 7, the transmission processing unit 8, and the reception processing unit 9 in FIG. Processing of each unit may be performed by recording the program on a computer-readable recording medium, causing the computer system to read the program recorded on the recording medium, and executing the program. Here, the “computer system” includes an OS and hardware such as peripheral devices.

  The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Furthermore, the “computer-readable recording medium” dynamically holds a program for a short time like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, a volatile memory in a computer system serving as a server or a client in that case, and a program that holds a program for a certain period of time are also included. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes design and the like within a scope not departing from the gist of the present invention.

  The present invention is suitable for use in a mobile communication system, but is not limited to this.

It is a figure which shows the structure of the channel in the conventional EUTRA. It is a schematic structure of the downlink frame in the conventional EUTRA It is a figure explaining arrangement | positioning of the downlink pilot channel in 1PRB in the downlink of the conventional EUTRA. It is a figure for demonstrating the conventional transmission diversity method. It is a figure explaining the example of arrangement | positioning to each resource element of the transmission signal of the spatial frequency block code SFBC using the conventional two transmission antennas. It is a figure explaining the example of arrangement | positioning to each resource element of the transmission signal of the spatial frequency block code SFBC using the conventional two transmission antennas. It is a figure explaining the outline of the example of a distributed virtual resource block DVRB mapping using the conventional time multiplexing method. It is a figure which shows the case where the distributed virtual resource block DVRB of FIG.7 (b) is applied in the downlink frame to which conventional SFBC + FSTD is applied. It is a schematic block diagram of the base station apparatus 1 in this embodiment of this invention. It is a schematic block diagram which shows the internal structure of the transmission process part 5 of the base station apparatus 1 in the embodiment. The schematic block diagram of the mobile station apparatus 2 in the embodiment is shown. It is a schematic block diagram which shows the internal structure of the reception process part 9 of the mobile station apparatus 2 in the embodiment. It is a figure explaining DVRB mapping in case the downlink control channel in the embodiment is comprised from 3 OFDM symbols and the multiplexing number Nd is 2. FIG. It is a figure explaining DVRB mapping in case the downlink control channel in the embodiment is comprised from 3 OFDM symbols and the multiplexing number Nd is 3. FIG. It is a figure explaining arrangement | positioning of the frequency set of SFBC + FSTD with respect to a downlink shared data channel in case the downlink control channel in the embodiment is comprised from 2 OFDM symbols. It is a figure explaining DVRB mapping in case the downlink control channel in the embodiment is comprised from 2 OFDM symbols, and the multiplexing number Nd is 2. FIG. It is a figure explaining DVRB mapping in case the downlink control channel in the embodiment is comprised from 2 OFDM symbols and the multiplexing number Nd is 3. FIG. It is a figure explaining arrangement | positioning of the frequency set of SFBC + FSTD with respect to the downlink shared data channel in the embodiment. It is a figure explaining DVRB mapping in case the downlink control channel in the embodiment is comprised from 1 OFDM symbol, and the multiplexing number Nd is 2. FIG. It is a figure explaining DVRB mapping in case the downlink control channel in the embodiment is comprised from 1 OFDM symbol, and the multiplexing number Nd is 3. FIG. It is a figure explaining the procedure which the mobile station apparatus 2 in the embodiment recognizes the downlink shared data channel allocated to the own mobile station apparatus from the subframe. The figure explaining DVRB mapping which shifts the order of distributed virtual resource block DVRB for every period which arranges a frequency set in order when the downlink control channel in the embodiment is comprised of 3 OFDM symbols and the multiplexing number Nd is 3. It is.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Base station apparatus 2 ... Mobile station apparatus 3 ... Radio | wireless resource control part 4, 7 ... Control part 5, 8 ... Transmission processing part 6, 9 ... Reception processing part 10 ... Data channel processing part 11 ... Control channel processing part 12 ... Reference signal generation unit 13 ... Control format indicator signal generation unit 14 ... Multiplexing unit 15 ... IFFT unit 16 ... GI insertion unit 17 ... D / A unit 18 ... Transmission RF unit 20 ... Turbo coding unit 21 ... Data modulation unit 22, 32 ... Transmission diversity processing unit 30 ... convolutional code unit 31 ... QPSK modulation unit 40 ... reception RF unit 41 ... A / D unit 42 ... GI removal unit 43 ... FFT unit 44 ... demultiplexing unit 45 ... propagation path estimation unit 46, 47, 48 ... propagation path compensation unit 49, 52 ... transmission diversity combining unit 50 ... data demodulation unit 51 ... turbo decoding unit 53 ... QPSK demodulation unit 54 ... Viterbi decoder unit

Claims (13)

In a wireless communication system that includes a wireless transmission device and a plurality of wireless reception devices and communicates using transmission diversity for transmitting signals with redundancy,
The wireless transmission device
A transmission diversity processing unit that makes a signal to be transmitted to each wireless reception device redundant, and generates a set of signals by redundancy;
A multiplexing unit that multiplexes the redundant signals addressed to a plurality of the wireless reception devices into a physical resource block having a predetermined frequency band and time band in units of a set of signals by the redundancy;
A transmission unit for transmitting the multiplexed signal by the multiplexing unit;
The wireless receiver is
A receiver for receiving a signal transmitted by the wireless transmitter;
A demultiplexing unit that extracts a signal addressed to the wireless reception device based on an order of arrangement by the multiplexing unit from a signal multiplexed in the physical resource block among the received signals;
A wireless communication system, comprising: a transmission diversity combining unit configured to combine signals constituting a set of signals by redundancy among the extracted signals to generate a signal before redundancy. The multiplexing unit of the wireless transmission device arranges and multiplexes the redundant signal in the physical resource block so that the wireless reception device that is the destination of the redundant signal is repeated in the same order. The wireless communication system according to claim 1. The multiplexing unit of the wireless transmission device arranges the redundant signal in the physical resource block so that the wireless reception device that is the destination of the redundant signal is repeated in a different order for each repetition. The radio communication system according to claim 1, wherein the radio communication system is multiplexed. The radio communication system according to claim 2 or 3, wherein the multiplexing unit arranges and multiplexes the redundant signals so that the order is different for each physical resource block. In the physical resource block, a control data signal is multiplexed,
The transmission unit of the wireless transmission device includes information indicating the amount of control data signal multiplexed in the physical resource block and destination of the redundant signal multiplexed in the physical resource block. Transmitting a parameter including at least information indicating the number of the receiving devices and information indicating the identification number of the one receiving device in the receiving device group serving as the destination,
The demultiplexing unit of the wireless reception device determines an arrangement order of signals in the physical resource block among the received signals based on the parameters, and extracts a signal addressed to the wireless reception device from the physical resource block. The wireless communication system according to any one of claims 1 to 4, wherein: In the signal redundancy by the transmission diversity processing unit, the first signal is allocated to the first frequency transmitted from the first antenna, and the second signal is allocated to the first frequency transmitted from the second antenna. A signal obtained by converting the second signal for redundancy is assigned to a second frequency transmitted from the first antenna, and a signal obtained by converting the first signal for redundancy is assigned to the second frequency. Assigned to the second frequency transmitted from the antenna;
The set of signals by the redundancy is a set including the first signal, the second signal, a signal obtained by converting the first signal, and a signal obtained by converting the second signal. The wireless communication system according to any one of claims 1 to 5. In the signal redundancy by the transmission diversity processing unit, the first signal is allocated to the first frequency transmitted from the first antenna, and the second signal is allocated to the first frequency transmitted from the second antenna. A signal obtained by converting the second signal for redundancy is assigned to a second frequency transmitted from the first antenna, and a signal obtained by converting the first signal for redundancy is assigned to the second frequency. Assign to the second frequency transmitted from the antenna, assign a third signal to the third frequency transmitted from the third antenna, and assign a fourth signal to the third frequency transmitted from the fourth antenna The signal obtained by converting the fourth signal for redundancy is assigned to the fourth frequency transmitted from the third antenna, and the signal obtained by converting the third signal for redundancy is assigned to the fourth frequency. Ante Assigned to the fourth frequency to be transmitted from,
The set of signals by the redundancy includes the first signal, the second signal, a signal obtained by converting the first signal, a signal obtained by converting the second signal, the third signal, and the fourth signal. The wireless communication according to any one of claims 1 to 5, wherein the wireless communication is a set of a signal obtained by converting the first signal, a signal obtained by converting the third signal, and a signal obtained by converting the fourth signal. system. The transmission unit of the wireless transmission device transmits an OFDM signal, and the reception unit of the wireless reception device receives an OFDM signal. The wireless communication system according to 1. In a wireless transmission device that communicates with a plurality of wireless reception devices using transmission diversity for redundant signal transmission,
A transmission diversity processing unit that makes a signal to be transmitted to each wireless reception device redundant, and generates a set of signals by redundancy;
A multiplexing unit that multiplexes the redundant signals addressed to a plurality of the wireless reception devices into a physical resource block having a predetermined frequency band and time band in units of a set of signals by the redundancy;
A wireless transmission apparatus comprising: a transmission unit that transmits a signal multiplexed by the multiplexing unit. A computer included in a wireless transmission device that communicates with a plurality of wireless reception devices using transmission diversity for transmitting signals in redundancy.
A transmission diversity processing unit that makes a signal to be transmitted to each wireless reception device redundant, and generates a set of signals by redundancy,
A multiplexing unit that multiplexes the redundant signals addressed to a plurality of the wireless reception devices into physical resource blocks each having a predetermined frequency band and time band in units of the redundant signal sets;
A program for causing the multiplexing unit to function as a transmission unit that transmits a multiplexed signal. In a wireless reception device that communicates with a wireless transmission device using transmission diversity in which signals are made redundant,
A receiver for receiving a signal transmitted by the wireless transmitter;
Demultiplexing that extracts a signal addressed to the radio receiving device from signals multiplexed in a physical resource block having a frequency band and a time zone of a predetermined width among the received signals based on an arrangement order by the radio transmitting device. And
A radio diversity apparatus comprising: a transmission diversity combining unit configured to combine signals constituting a set of signals by redundancy among the extracted signals and generate a signal before the redundancy. A computer provided in a wireless reception device that communicates with a wireless transmission device using transmission diversity in which a signal is transmitted with redundancy,
A receiver for receiving a signal transmitted by the wireless transmitter;
Demultiplexing that extracts a signal addressed to the radio receiving device from signals multiplexed in a physical resource block having a frequency band and a time zone of a predetermined width among the received signals based on an arrangement order by the radio transmitting device. Part,
A program for functioning as a transmission diversity combining unit for combining signals constituting a set of signals by redundancy among the extracted signals and generating a signal before the redundancy. A wireless communication method in a wireless communication system comprising a wireless transmission device and a plurality of wireless reception devices, and performing communication using transmission diversity for transmitting signals with redundancy,
A first process in which the wireless transmission device makes a signal transmitted to each wireless reception device redundant, and generates a set of signals by redundancy;
The wireless transmission device converts the redundant signal addressed to the plurality of wireless reception devices into a physical resource block having a predetermined frequency band and time band, with the redundant signal set as a unit. A second process of multiplexing;
A third process in which the wireless transmission device transmits a signal multiplexed by the multiplexing unit;
A fourth process in which the wireless reception device receives a signal transmitted by the wireless transmission device;
A fifth step in which the radio reception device extracts a signal addressed to the radio reception device based on an arrangement order according to the second step from a signal multiplexed in the physical resource block among the received signals;
The wireless receiving apparatus comprises: a sixth step of generating signals before redundancy by combining signals constituting the set of signals by redundancy among the extracted signals. Communication method.

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