CN103873206A - Mobile terminal - Google Patents

Abstract

Disclosed is a mobile terminal. The mobile terminal comprises a first receiving unit which is used for receiving multiple data blocks from a base station provided with multiple antennae, a second receiving unit which is used for receiving progress information from the base station through a control channel, and a combination unit which is used for combining the received data blocks with resent data blocks according to the progress information, wherein the progress information prevents the competition among the multiple data blocks.

Description

Mobile terminal

The application, based on the 42nd article of proposition of Patent Law detailed rules for the implementation, is to be the divisional application of the application for a patent for invention " transfer control method in wireless communication system and dispensing device and receiving system " that October 27, application number were 200680056206.X in 2006 applying date.

Technical field

The present invention relates to a kind of mobile terminal, relate in particular to and be applicable to MIMO(Multi Input Multi Output, multiple-input and multiple-output) transmission repeating transmission control technology.

Background technology

About mobile communication system such as portable phones, at present based on CDMA(Code Division Multiple Access, code division multiple access access) third generation mode of mode started service, and advancing the Access with OFDMA(Orthogonal Frequency Division Multiple, OFDM access) mode is the research (with reference to the non-patent literature 1 of narrating below) that the next generation mobile communication system of more high-speed traffic is realized on basis.

Therefore,, as making the rapid technology of transmission rate, MIMO is suggested as strong technology.Figure 19 represents the overview of MIMO transmission system.MIMO transmission system shown in this Figure 19 is configured to and comprises: have multiple transmitting antennas (antenna sets) Tx#1, Tx#2 ..., Tx#n(n is more than 2 integers) dispensing device 100; And have multiple reception antennas (antenna sets) Rx#1, Rx#2 ..., Rx#n receiving system 200, thereby this MIMO transmission system is from the parallel spatial reuse transmission technology that sends different data flow and number of transmit antennas n and increase pro rata transmission capacity of each transmitting antenna Tx#i(i=1～n).Different transmitting antenna Tx#i are configured to non-correlation each other, and the data flow sending from each transmitting antenna Tx#i, respectively by the transmission path that independently declines, receives with the received antenna Rx#i of state mixing with other data flow in space.

As the realization example of this MIMO transmission system, as shown in figure 20, for example, have each antenna is independently flowed to the method for processing.For example, can enumerate the PARC(Per Antenna Rate Control that does not carry out precoding (Precoding), wire rate control in each day) (with reference to the non-patent literature 2 narrated below) and the PSRC(Per Stream Rate Control that carries out precoding, each flow rate control) (with reference to the non-patent literature 3 of narrating below) etc.

Specifically, in system shown in this Figure 20, for example dispensing device 100 is configured to and comprises CRC appendix 102, coding portion 103 and HARQ handling part 104, the sending part 105 of stream separation unit 101, each transmission stream and retransmit control part 106, and receiving system 200 is for example configured to and comprises that signal separates/synthesize HARQ handling part 202 and the synthetic portion 205 of CRC operational part 203, ACK/NACK detection unit 204 and stream of portion 201, each reception stream.In addition, ATR represents the reception antenna of dispensing device 100, ATT represents the transmitting antenna of receiving system 200, in this example, for convenient, illustrate from transmitting antenna ATT and send ACK/NACK(Acknowledgement/Negative Acknowledgement) signal (confirmation answer signal), and situation about being received by reception antenna ATR.

And dispensing device (below also referred to as transmitter side) 100 is for example according to the flow chart action shown in Figure 21, receiving system (below also referred to as receiver side) 200 is for example according to the flow chart action shown in Figure 22.

, in dispensing device 100, send data by the transmission stream (steps A 1) that flows separation unit 101 and be separated into each antenna sets Tx#i, by CRC appendix 102, the transmission stream additional error of each antenna sets Tx#i is detected the CRC(Cyclic Redundant Check of use, cyclic redundancy check (CRC)) code (steps A 2), in order to correct bit mistake, in coding portion 103, carry out the coding of data flow, in order to retransmit control, in HARQ handling part 104, carry out HARQ(Hybrid Automatic Repeat reQuest) processing (steps A 4), in sending part 105, select the transmitting antenna Tx#i of transmitting HARQ piece (process) and modulate, then send to receiving system 200.At this, in the time using precoding (in the time that steps A 5 is "Yes"), each process can be selected multiple transmitting antenna Tx#i, but in the time of PARC (in the time that steps A 5 is "No"), sends from predetermined transmitting antenna Tx#i.

On the other hand, in receiving system 200, as shown in figure 22, the signal sending from dispensing device 100 is received by each reception antenna Rx#i, separate/synthesize via signal separation/synthetic (the step B1) that portion 201 carries out this reception signal, judge whether the signal (process) receiving is repeating transmission process (step B2).If result is repeating transmission process (step B2 is "Yes"), receiving system 200 utilizes the signal that HARQ handling part 202 receives this and last time received and the reception signal synthetic (step B3) of the same process that keeps.Utilize CRC operational part 203 to check the CRC appending in each process, detect thus bit mistake (step B4).In addition, when the process receiving at this is not repeating transmission process (step B2 is "No"), does not carry out the synthetic of HARQ handling part 202, and carry out bit error detection (step B4) by CRC operational part 203.

And, when bit mistake detected in ACK/NACK detection unit 204 time (step B5 is "Yes"), keep receiving process and utilize transmitting antenna ATT to reply NACK signal (step B6) to dispensing device 100, in the time mistake not detected (step B5 is "No"), utilize transmitting antenna ATT to reply ack signal to dispensing device 100, and process is delivered to upper layer (step B7).In addition, the reception signal that each wrong stream do not detected is finally by the synthetic rear output of the synthetic portion 205 of stream.

In this series of processes, the required critical function of high-speed traffic is HARQ.HARQ is the ARQ mode that has combined arq (ARQ) and error correction coding (FEC:Forward Error Correction, forward error correction).Specifically, the parity check bit that block of information bits additional error is detected to use at transmitter side 100 carries out error correction coding, and sends its all or part of.Producing while retransmitting, retransmit for all or part of in the coded-bit of current block.

Receiver side 200 to retransmission blocks in corresponding each bit of each existing piece synthesize processing, use the synthetic piece that its result obtains again to carry out error correction and error detection processing.Like this, receiver side 200 repeats to the ACK/NACK reply of transmitter side 100 and the retry of the decoding processing based on retransmitting, until the mistake of piece is eliminated within the scope of predetermined upper limit number of times.

In mobile communicating of future generation, be especially suitable for N-channel Stop-and-Wait ARQ(with reference to the non-patent literature 4 of narrating below).At this, N represents integer, the piece number (process number) that expression can send simultaneously.About the process sending simultaneously, each process is carried out to the repeating transmission control based on Stop and Wait.

Figure 23 represents the overview of N-channel Stop-and-Wait ARQ.

Each process is sent out in the unit interval of wireless transmission (TTI:Transmission Time Interval), and utilizes this identifier of process sequence number N to identify.Count N=5(0～4 in process shown in this Figure 23) situation, be therefore equivalent to the situation of 5-channel Stop-and-Wait ARQ.In addition, in Figure 23, for convenient, the data division additional process sequence number of each process is represented, but in fact process sequence number sends by control channel, the data division of each process is not by additional process sequence number., process sequence number is to attach (following identical) that in the data division of each process, be sent out.

Receiving system 200 receives process from dispensing device 100, carries out error detection recited above.At this, suppose in process 0～4, process " 1 ", " 3 ", " 4 " produce mistake, process " 0 ", " 2 " do not produce mistake, for not producing wrong process " 0 ", " 2 ", reply ack signal to dispensing device 100, for having produced wrong process " 1 ", " 3 ", " 4 ", maintenance process in memory (omitting diagram), then replys NACK signal to dispensing device 100.The reply of ack/nack signal also sends by control channel, but does not need to reply process sequence number when this situation.

Receiving system 200 is adjusted timing turnaround time of each processes and is also replied ack/nack signal, and can to identify be the ack/nack signal for which process to dispensing device 100 thus.After receiving ack signal, dispensing device 100 carries out the transmission of new process, but process sequence number now can add arbitrarily comprise additional process sequence number time in being engraved in, in 5 processes, there is no used process sequence number (in Figure 23, carrying out additional process sequence number according to the ascending order of original process sequence number) in the past.

On the other hand, receive after NACK at dispensing device 100, produced the repeating transmission of wrong process, process sequence number is now added the sequence number identical with process sequence number last time.After retransmitting, receiving system 200 is identified process sequence number, and judgement should be synthetic with which process.,, in the time receiving repeating transmission process and be process " 1 ", " 3 ", " 4 ", divide and be combined into process " 1 ", " 2 ", " 3 " with the identical process sequence number keeping in the time last time sending NACK signal respectively.After synthetic, check CRC, in the time can not receiving mistakenly, reply ACK to dispensing device 100.On the other hand, having produced when wrong, keep the process after synthetic, again reply NACK signal to dispensing device 100.

In addition, have two kinds of representational methods about synthetic method, the present invention can use any synthetic method.One is identical data while retransmitting with in the past transmission in the time retransmitting, reception signal when sending in the past and the reception signal while retransmitting are synthetic, and carry out the generation of the data that decode, another kind is the collapsed mode (puncturing pattern) that changes the data after coding in the time retransmitting, and be sent to the bit not sending till the present, reception signal when sending in the past and the reception signal while retransmitting are synthetic, reduce equivalent encoding rate, improve error correcting capability (coding gain).The latter's technology is called as IR(Incremental Redundancy, steadily increase redundancy).

This process is processed with the similarities and differences of the PARC narrating above and precoding and is had nothing to do and all carry out in the same way.Therefore, go on to say as an example of PARC example below.

The situation of N-channel Stop-and-Wait ARQ when Figure 24 represents dispensing device 100 and receiving system 200 corresponding to PARC.

As previously described, in PARC, CRC is additional, coding, HARQ are processed and independently carried out for each antenna, so HARQ process sequence number is also added independently sequence number.In Figure 24, represent that process " 1 ", " 3 ", " 4 " that send from transmitting antenna Tx#1 and the process " 1 " sending from transmitting antenna Tx#2 produce the situation (with reference to dotted arrow) of retransmitting.In this case, as previously described, carry out HARQ for each antenna sets, so each antenna sets is independently retransmitted to control.In addition, the addition method of process sequence number is additional according to the rule identical with Figure 23.

And, in the MIMO of mobile body communication system of future generation transmission, for example, for the data-signal sending between transmitting antenna Tx#i being separated/synthesizes, dispensing device 100 transmitting antenna identification signals (pilot signal and scrambling code).

Pilot signal additional example when Figure 25 represents that the transmitting antenna of dispensing device 100 is two.As shown in (1) and (2) in this Figure 25, between each antenna sets Tx#1, Tx#2 with same time sequence, different frequency sequence additional pilot signal (R:Reference Symbol).Receiving system 200 passes through with reference to pilot signal, the signal of separate antenna group Tx#1 the signal receiving from the antenna sets Rx#1 by receiving system 200, the signal of separate antenna group Tx#2 the signal receiving from the antenna sets Rx#2 by receiving system 200, makes synthetic each signal rear stream (process) sending restore.And conventionally, the corresponding relation of antenna sets and pilot signal utilizes announcement information to send.

Non-patent literature 1: " 3GPP TR25.913V7.3.0Requirements for Evolved UTRA (E-UTRA) and Evolved UTRAN (E-UTRAN) (Release7); " 3GPP (France), 2006-03

Non-patent literature 2:Lucent, " Improving MIMO throughput with per-antenna rate control (PARC), " 3GPP (France), 2001-08

Non-patent literature 3:Lucent, " Per Stream Rate Control with Code Reuse TxAA and APP Decoding for HSDPA, " 3GPP (France), 2002-09

Non-patent literature 4: " 3GPP TR25.814V7.4.0Physical Layer Aspects for evolved Universal Terrestrial Radio Access (UTRA) (Release7); " 3GPP (France), 2006-06

About the communication environment that is suitable for MIMO transmission system, for example, can enumerate the cell structure shown in Figure 26.; the form that is region a cell division according to the form of MIMO transmission; as shown in Figure 26 (1); be positioned at the medial region (MIMO multiplexing transmission region) 302 o'clock of base station 300 at mobile radio station 400; carry out MIMO multiplexing transmission (utilizing two flow transmission in Figure 26 (1)); be positioned at exterior lateral area (non-MIMO multiplexing transmission region) 303 o'clock, carrying out non-MIMO multiplexing transmission (utilizing a flow transmission in Figure 26 (1)).In addition, so-called " non-MIMO multiplexing transmission " for example refers to MIMO diversity transmission and utilizes an antenna to carry out the MIMO single transport of the transmitting-receiving of a stream.

And, as shown in Figure 26 (2), even if also exist in MIMO multiplexing transmission region 302, but look logical communicate by letter at the near zone 301 that mobile radio station 400 is positioned at base station 300, but carry out the situation of non-MIMO multiplexing transmission (utilizing a flow transmission in Figure 26 (2)).This is because relevant depending on producing between antenna when communication in logical, so be difficult to carry out the separation of signal/synthesize in receiving system 200, likely can not realize heavy traffic.

In this case, even if also do not carry out MIMO multiplexing transmission in the near zone 301 of base station 300, and carry out non-MIMO multiplexing transmission with modulation rate, high code-rate, this method will likely realize heavy traffic.

Like this, be not fixing applicable MIMO multiplexing transmission in Yi Ge community, but according to the position of mobile radio station 400, be sometimes suitable for non-MIMO multiplexing transmission yet.For example, for example, in the time that the wireless quality (mobile radio station 400 reports to the mean value of the SN ratio of base station 300) of mobile radio station 400 is greater than certain threshold value, carry out MIMO multiplexing transmission, in the time being less than this threshold value, carry out non-MIMO multiplexing transmission.

Now, fluxion amount is reduced to a stream from multiple stream, for example as PARC to the method for each antenna sets independence additional process sequence number in, in the time that fluxion amount reduces, the process sequence number of HARQ repeats (competition), likely causes continuing communicating by letter.

For example, action example when, Figure 27 is illustrated in and switches to MIMO diversity transmission from MIMO multiplexing transmission in PARC.This example represents the situation of utilizing one to flow back to multiple ack/nack signal.

From the antenna sets Tx#1 of dispensing device 100 and antenna sets Tx#2 according to timed sending process " 0 ", " 1 ", " 2 " shown in Figure 27, the ack signal of having replied from receiving system 200 to dispensing device 100 for the process " 0 " sending from each antenna sets Tx#1, Tx#2, " 1 ", the timing that utilizes symbol 500 to represent in Figure 27, the position of mobile radio station 400 moves to non-MIMO multiplexing transmission region (MIMO diversity transmission region) 301 or 303 from the MIMO multiplexing transmission region 302 shown in Figure 26.

Now, if the main antenna group of the dispensing device 100 of the processing of the stream flowing into is made as to antenna sets Tx#2, dispensing device 100 is sent in from antenna sets Tx#1 and Tx#2 the process " 2 " of storing before MIMO diversity transmission that switches to.Receiving system 200 utilizes antenna sets Rx#1 and Rx#2 to receive these signals, carries out synthesizing and building process " 2 " of signal.Then, receiving system 200 attempts carrying out point being combined into of the process " 2 " that keeps when last time sending, but produces following problem herein.

(problem 1) receiving system 200 can not be identified repeating transmission process " 2 " should be synthetic with which process keeping.; example as shown in figure 28; receiving system 200 is retransmitted process " 2 " by MIMO diversity reception; but as previously described; in the situation that only having watched process sequence number to divide being combined into; because antenna sets Rx#1 and antenna sets Rx#2 are keeping respectively process " 2 ", so can not judge with which process synthetic.Suppose in the case of the process (reference marks 601) of attempting and kept by main antenna group Rx#2 is synthetic, by the process of antenna sets Rx#1 " 2 " (reference marks 602) with utilize the process " 2 " of the antenna sets Rx#2 that symbol 601 represents to divide to be combined into, to make synthetic conformability destroyed.

In addition, also produce following problem.

(problem 2), in dispensing device 100, produces the mistake shown in situation 1,2 below and retransmits.

The situation that (situation 1) carries out the reply of ack/nack signal by time timing adjustment

In this case, by base station, the reply of ACK/NACK timing (turnaround time and reply frequency) is indicated to mobile radio station.

Figure 29 represents its overview.Receiving system 200 is replied ack/nack signal by the time timing adjustment of main antenna group Rx#2.Now, dispensing device 100 utilizes the timing information of main antenna group Tx#2 to receive reply.When this situation, as shown in figure 29, the repeating transmission timing that dispensing device 100 receives the timing of reply and the process " 2 " of the antenna sets Tx#2 that utilizes symbol 603 to represent overlaps, process " 2 " that should retransmitting antenna group Tx#1, but the process of retransmitting antenna group Tx#2 " 2 " mistakenly likely.Now, process " 2 " that can not retransmitting antenna group Tx#1.

(situation 2) is not to utilize time timing adjustment but the process sequence number of utilization is carried out the situation of the reply of ack/nack signal

This situation refers to not carry out timing adjustment carries out the situation of the reply of ACK/NACK.Therefore, different from situation 1, do not need to reply the instruction of timing adjustment, but in the time replying ACK/NACK, need additional process sequence number.

Figure 30 represents its overview.Receiving system 200 is expressed process sequence number and replys ack/nack signal from main antenna group Rx#2.Now, receive and reply by antenna sets Tx#2.Now, as shown in figure 30, in the time of the reply receiving for the process " 2 " of antenna sets Tx#1, it is the NACK signal for the process " 2 " of antenna sets Tx#2 that dispensing device 100 is interpreted as mistakenly.Therefore process " 2 " that, can not retransmitting antenna group Tx#1.

Like this, when produce the repetition of process sequence number in each antenna sets time, will produce following problem, in receiving system 200, can not judge and will between the process of which antenna sets, synthesize, on the other hand, the mistake that produces process in dispensing device 100 is retransmitted, and the process that should retransmit can not be retransmitted.

And, utilize two to flow to dispensing device 100 and reply while confirming to reply (ack/nack signal) from receiving system 200, also produce the problem identical with the problems referred to above.Figure 31 and Figure 32 represent this situation.,, in receiving system 200, as shown in figure 28, can not judge that repeating transmission process " 2 " should be synthetic with which process being kept by antenna sets Rx#1 and antenna sets Rx#2 respectively.And, in dispensing device 100, produce the problem identical with the problem of utilizing Figure 29 and Figure 30 narration above.

That is, in the time switching to MIMO diversity transmission from MIMO multiplexing transmission,

(1) replying in the confirmation of replying from receiving system 200 is from antenna sets Rx#2 replys, as shown in figure 31, reply ack/nack signal from the transmitting antenna ATT2 of receiving system 200, but when this situation, the action of dispensing device 100 is identical with the situation shown in Figure 29 and Figure 30, the process " 2 " of ground retransmitting antenna group Tx#2 so lead to errors, and process " 2 " that can not retransmitting antenna group Tx#1

(2) in the case of the confirmation of replying from receiving system 200 reply be reply by MIMO diversity, shown in figure 32, reply ack/nack signal from transmitting antenna ATT1 and ATT2, so signal that dispensing device 100 diversity receptions are replied by reception antenna ATR1 and ATR2, but because main antenna group is antenna sets Tx#2, thus finally they to be determined be the reply for antenna sets Tx#2.Therefore, the process " 2 " of the ground retransmitting antenna group Tx#2 that leads to errors, and process " 2 " that can not retransmitting antenna group Tx#1.

Summary of the invention

The present invention proposes in view of the above problems, its object is, as the situation that switches to MIMO diversity transmission from MIMO multiplexing transmission, transport stream number change (minimizing) in the situation that, the conformability that also can maintain process sequence number (i.e. stream identification), can continue normally to communicate.

In order to achieve the above object, feature of the present invention is transfer control method and dispensing device and the receiving system using in following wireless communication system.,

(1) first method of the transfer control method in wireless communication system of the present invention is characterised in that, can transmit to receiving system the wireless communication system of multiple flow datas with the data block unit being scheduled to from the dispensing device with multiple transmitting antennas, this dispensing device is attached to respectively and between described flow data, does not have competitive data block identifying information each flow data of described multiple flow datas, this data block is sent to this receiving system, this receiving system is according to additional described data block identifying information in the reception data block from this dispensing device, the data accepted piece and the retransmitted data blocks that are attached with identical block identifying information are retransmitted to synthetic processing.

(2) at this, this dispensing device also can append to as described data block identifying information the information that comprises antenna identifier in described data block, and described antenna identifier is for the relevant identifier of transmitting antenna that sends described flow data.

(3) and, this dispensing device also can divide into groups a series of serial number information according to described each flow data, and according to this each flow data, the serial number information in corresponding group appends in described data block as described data block identifying information.

(4) in addition, this receiving system also can be to the additional described data block identifying information of the re-send request may for described reception data block, this re-send request may is sent to this dispensing device, this dispensing device is in the time receiving described re-send request may, using the data block of utilizing described data block identifying information additional in this re-send request may to identify as described retransmitted data blocks, retransmit to this receiving system.

(5) and, the second method of the transfer control method in wireless communication system of the present invention is characterised in that, can transmit to receiving system the wireless communication system of multiple flow datas from the dispensing device with multiple transmitting antennas, this dispensing device detects the minimizing governing factor of described flow data quantity, in the time detecting described minimizing governing factor, according to the not transmission data volume of the flow data about minimizing control object, make the minimizing control constant time lag of described flow data quantity.

(6), at this, this dispensing device also can, after the described transmission that does not send data finishes, be implemented described minimizing control.

(7) and, this dispensing device also can monitor the wireless quality between this receiving system, during lower than predetermined threshold value, even if the transmission of described remaining data does not finish, also implements described minimizing control at described wireless quality.

(8) in addition, this dispensing device also can monitor the wireless quality between this receiving system, if there is not the remaining data of the flow data that reduces object at described wireless quality lower than the time point of predetermined threshold, implement the minimizing control of described fluxion amount at this time point.

(9) and, dispensing device of the present invention is the dispensing device that can transmit to receiving system with the data block unit being scheduled to from having the dispensing device of multiple transmitting antennas the wireless communication system of multiple flow datas, this dispensing device is characterised in that, have: data block identifying information extra cell, it is according to each flow data of described multiple flow datas, to described data block added block identifying information; Transmitting element, it sends the data block of having been added described data block identifying information to this receiving system; And control unit, it controls this data block identifying information extra cell, to make described data block identifying information described each flow data between the not competition additional to described data block.

(10) at this, this control unit also can be configured to has antenna identifier generating unit, this antenna identifier generating unit is comprising for the information of the antenna identifier of the transmitting antenna of described data flow as the data block identifying information that should append in the data block of this data flow, and offers this data block identifying information extra cell.

(11) and, this control unit also can be configured to be had by group serial number gencration portion, should according to described each data flow, a series of serial number information be divided into groups by group serial number gencration portion, and according to this each data flow, serial number information in corresponding group, as the data block identifying information that should append in described data block, offers this data block identifying information extra cell.

(12) in addition, described dispensing device can also also have repeating transmission control unit, when receive from this receiving system added described data block identifying information, during for the re-send request may of described reception data block, this repeating transmission control unit retransmits the data block of utilizing this data block identifying information to identify to this receiving system.

(13) and, receiving system of the present invention is the receiving system that can transmit to receiving system with the data block unit being scheduled to from having the dispensing device of multiple transmitting antennas the wireless communication system of multiple flow datas, it is characterized in that, this receiving system has: receiving element, and its reception has added the data block of not sending after competitive data block identifying information between described flow data by this dispensing device according to each flow data of described multiple flow datas; With repeating transmission synthesis unit, it retransmits synthetic processing according to additional data block identifying information in the reception data block being received by this receiving element to the data accepted piece and the retransmitted data blocks that are attached with identical block identifying information.

(14) in addition, described receiving system can also have re-send request may transmitting element, and this re-send request may transmitting element adds described data block identifying information to the re-send request may for described reception data block, and this re-send request may is sent to this dispensing device.

Invention effect

At least can obtain following effect or advantage according to the invention described above.

; even in the time that the situation that switches to non-MIMO multiplexing transmission (MIMO diversity transmission etc.) from MIMO multiplexing transmission as transmission mode, the transport stream quantity between dispensing device and receiving system changes (minimizing); between transport stream, can not produce the competition of data block identification yet, thus can avoid the mistake of the dispensing device of data block retransmit and receiving system in mistake synthesize.Therefore, can continue between dispensing device and receiving system, communicate by letter normally (flow transmission).

Brief description of the drawings

Fig. 1 is the block diagram of the structure of the MIMO transmission system that represents that the 1st execution mode of the present invention relates to.

Fig. 2 is the block diagram representing in the lump for an example of the process sequence number of the process sequence number addition method of the MIMO transmission system shown in key diagram 1.

Fig. 3 is the figure for the retransmission process action of the MIMO transmission system shown in key diagram 1.

Fig. 4 is the flow chart for the action of the dispensing device of the MIMO transmission system shown in key diagram 1.

Fig. 5 is the figure for the answering method of the ACK/NACK of the MIMO transmission system shown in key diagram 1 (situation 1).

Fig. 6 is the flow chart for the action of the receiving system of the MIMO transmission system shown in key diagram 1 (situation 1).

Fig. 7 is the figure for the answering method of the ACK/NACK of the MIMO transmission system shown in key diagram 1 (situation 2).

Fig. 8 is the flow chart for the action of the receiving system of the MIMO transmission system shown in key diagram 1 (situation 2).

Fig. 9 illustrates the structure of MIMO transmission system that the 2nd execution mode of the present invention relates to and the block diagram of an example of process sequence number in the lump.

Figure 10 is the block diagram illustrating in the lump for an example of the process sequence number of other process sequence number addition methods of the MIMO transmission system shown in key diagram 9.

Figure 11 is the figure for the retransmission process action of the MIMO transmission system shown in key diagram 9.

Figure 12 is the flow chart for the action of the dispensing device of the MIMO transmission system shown in key diagram 9.

Figure 13 is the flow chart for the action of the receiving system of the MIMO transmission system shown in key diagram 9 (situation 1).

Figure 14 is the flow chart for the action of the receiving system of the MIMO transmission system shown in key diagram 9 (situation 2).

Figure 15 is the figure of the retransmission process action for the MIMO transmission system that the 3rd execution mode of the present invention relates to is described.

Figure 16 is the figure for the MIMO transmission changing method that the 3rd execution mode relates to is described.

Figure 17 is the figure for the MIMO transmission changing method that the 4th execution mode of the present invention relates to is described.

Figure 18 is the figure of the retransmission process action for the MIMO transmission system that the 4th execution mode relates to is described.

Figure 19 is the synoptic chart of MIMO transmission system.

Figure 20 is the block diagram that represents the topology example of dispensing device in the MIMO transmission system shown in Figure 19 and receiving system.

Figure 21 is the flow chart of the action of the dispensing device for the MIMO transmission system shown in Figure 20 is described.

Figure 22 is the flow chart of the action of the receiving system for the MIMO transmission system shown in Figure 20 is described.

Figure 23 is the synthetic figure processing of the repeating transmission for the MIMO transmission system shown in Figure 20 is described.

Figure 24 is the figure of the situation of the N-channel Stop-and-Wait ARQ while representing dispensing device in the MIMO transmission system shown in Figure 20 and receiving system corresponding to PARC.

Figure 25 is the figure that represents the pilot signal additional example in the MIMO transmission system shown in Figure 20.

Figure 26 is the block diagram that represents the cell structure example of MIMO transmission system.

Figure 27 is the figure for the action example in the time that PARC switches to MIMO diversity transmission from MIMO multiplexing transmission is described.

Figure 28 is the figure of the problem for prior art is described.

Figure 29 is the figure of the problem for prior art is described.

Figure 30 is the figure of the problem for prior art is described.

Figure 31 is the figure of the problem for prior art is described.

Figure 32 is the figure of the problem for prior art is described.

Label declaration

1 dispensing device (base station); 11 stream separation units; 12CRC appendix; 13 coding portions; 14HARQ transmission processing portion (data block identifying information extra cell); 15 sending parts; 16 retransmit control part; 17,17A process sequence number appendix (control unit: antenna identifier generating unit, by group serial number gencration portion); 2 receiving systems (mobile radio station); 21 signals separate/synthesize portion's (receiving element); 22HARQ Return Reception Dept. (repeating transmission synthesis unit); 23CRC operational part; 24ACK/NACK detection unit (re-send request may transmitting element); The 25 synthetic portions of stream; 26,26A process sequence number dispenser; Tx#1, Tx#2 ..., Tx#n transmitting antenna (antenna sets); Rx#1, Rx#2 ..., Rx#n reception antenna (antenna sets); ATT transmitting antenna; ATR reception antenna.

Embodiment

Below, with reference to the accompanying drawings of embodiments of the present invention.But, the invention is not restricted to following execution mode, certainly can carry out without departing from the spirit and scope of the present invention various distortion enforcement.

(A) explanation of the 1st execution mode

Fig. 1 is the block diagram of the structure of the MIMO transmission system that represents that the 1st execution mode of the present invention relates to, and the MIMO transmission system shown in this Fig. 1 is configured to and comprises: have multiple transmitting antennas (antenna sets) Tx#1, Tx#2 ..., Tx#n at least 1 dispensing device 1; And have multiple reception antennas (antenna sets) Rx#1, Rx#2 ..., Rx#n at least 1 receiving system 2.In addition, dispensing device 1 for example can be as the transmitting system of base station apparatus, and receiving system 2 can be as the receiving system of mobile station apparatus.And, in this example, number of transmit antennas and reception antenna quantity are made as to equal number (n), but also can be different.

And, dispensing device 1 is in the time focusing on its major part, for example be configured to the CRC appendix 12, coding portion 13, HARQ transmission processing portion 14, sending part 15, repeating transmission control part 16 and the process sequence number appendix 17 that comprise stream separation unit 11, each transmission stream, receiving system 2 in the time focusing on its major part, for example, is configured to and comprises that signal separates/synthesize HARQ Return Reception Dept. 22 and CRC operational part 23, ACK/NACK detection unit 24, the synthetic portion 25 of stream and the process sequence number dispenser 26 of portion 21, each reception stream.In addition, in this Fig. 1, ATR represents the reception antenna of dispensing device 1, ATT represents the transmitting antenna of receiving system 2, for convenience of explanation, utilize a stream to send with the transmitting antenna ATT from receiving system 2 and confirm to reply (ack/nack signal), and receive this confirmation by the reception antenna ATR of dispensing device 1 and reply (ack/nack signal) for prerequisite.

At this, in dispensing device 1, stream separation unit 11 is separated into transmission data-signal the transmission stream of each antenna sets Tx#i, CRC appendix 12 detects respectively the CRC code of use to described transmission stream additional error, coding portion 13 is respectively necessary error correcting codes such as the transmission stream encryption that has been added this CRC code are Turbo code.

HARQ transmission processing portion 14 carries out HARQ processing (blocking) and sends sending part 15 to sending stream according to each process sequence number respectively, and this HARQ piece (process) is kept in not shown memory temporarily, use in order to retransmitting to control, sending part 15 implements to comprise modulation system (for example QPSK or the 16QAM based on necessary for the process of inputting from each HARQ transmission processing portion 14, 64QAM etc.) modulation, DA conversion, to the necessary wireless transmission processing of the frequency inverted of wireless frequency (RF) signal (increasing conversion frequently) etc., and send to receiving system 2 from any transmitting antenna Tx#i.

Retransmit control part 16 and carry out following control: according to the ack/nack signal from receiving system 2 being received by reception antenna ATR, determine whether and need to retransmit, retransmit if needed, determine antenna sets Tx#i and the process that retransmit, from the described memory of the HARQ transmission processing portion 14 corresponding with the antenna sets Tx#i that retransmits object, read the corresponding process of preservation, and send sending part 15 to.In addition,, for example, can determine according to the timing adjustment of the ack/nack signal of narrating above or for the expressing of process sequence number of ack/nack signal as narrated in the back about the antenna sets Tx#i that should retransmit and process.

And, process sequence number appendix 17 is to each HARQ piece (data block) additional process sequence number in each HARQ transmission processing portion 14, in this example, the information with this form of (antenna identifier)+(sequence number) is offered to HARQ transmission processing portion 14 as process sequence number, thereby between each antenna sets Tx#i, (each sends between stream) do not have the information of competition (repetition), transmission stream identifier appends to and sends in stream.For example, as shown in Figure 2 schematically, the process sequence number being attached in the transmission stream of antenna sets Tx#1 utilizes Bit String can be expressed as " 0...00xxx ", the process sequence number being attached in the transmission stream of antenna sets Tx#2 is expressed as " 0...01yyy ", the process sequence number being attached in the transmission stream of antenna sets Tx#n is expressed as " 1...11zzz " (wherein, x, y, z is respectively 0 or 1).After the additional this independently process sequence number of dispensing device 1, send stream to receiving system 2 transmission.

, HARQ transmission processing portion 14 brings into play the effect of data block identifying information extra cell, respectively for each stream in multiple stream, process sequence number (data block identifying information) is additional in process (data block), process sequence number appendix 17 is brought into play the effect of control unit, it controls HARQ transmission processing portion 14 so that append to the process sequence number not competition between each stream in described process, in addition, this process sequence number appendix 17 is also brought into play the effect of antenna identifier generating unit in the lump, the information including about the antenna identifier of the transmitting antenna Tx#i of stream is offered to HARQ transmission processing portion 14 as the process sequence number appending in the process of this stream.

On the other hand, in receiving system 2, signal separates/synthesizes portion 21 according to the control from course allocation portion 26, sending from each transmitting antenna Tx#i(i=1～n) and by spatial reuse, the signal being received by each reception antenna Rx#i separates according to each process, in the time of MIMO diversity, can divide and assemble processing, HARQ Return Reception Dept. 22 flows (process) and stores together with process sequence number separated/synthesize reception that portion 21 obtains by this signal, use in order to retransmitting synthetic processing, and the process of storage is synthetic with the repeating transmission process of the same process sequence number from dispensing device 1.

; above-mentioned signal separates/synthesize portion 21 brings into play the effect of receiving element; it receives by dispensing device 1 each stream has been added between stream and the process of not sending after competitive process sequence number (serial number information that comprises antenna identifier); the effect that synthesis unit is retransmitted in 22 performances of HARQ Return Reception Dept.; it retransmits synthetic processing according to separated/synthesize additional process sequence number in the receiving process that portion 21 receives by the signal as this receiving element to receiving process and the repeating transmission process of having been added same process.

CRC operational part 23 is implemented CRC computing to the reception stream being obtained by HARQ Return Reception Dept. 22 respectively, thereby carry out error checking, ACK/NACK detection unit 24 generates and confirms answer signal according to this CRC operation result, and send (feedback) to dispensing device 1 from transmitting antenna ATT, specifically, in the time that CRC operation result represents normally (OK), generate ack signal and also feed back to dispensing device 1, in the time that CRC operation result represents extremely (NG), generate NACK signal and also feed back to dispensing device 1.

Wherein, this routine ACK/NACK detection unit 24 as hereinafter described, can add to confirmation answer signal (ack/nack signal) part (antenna identifier) or whole (the process sequence number) of described process serial number information, and send to dispensing device 1.That is, this routine ACK/NACK detection unit 24 is brought into play the effect of re-send request may transmitting element, and it is to the re-send request may for receiving process (NACK signal) additional antenna identifier or process sequence number and send to dispensing device 1.

The stream that the synthetic portion 25 of stream is OK by the CRC operation result of each CRC operational part 23 is synthetic, and as receiving data output.

And course allocation portion 26 identifies the process sequence number of receiving process, separate/synthesize that signal in portion 21 separates and synthetic processing according to this process sequence number control signal, this receiving process is distributed and input to the either party in each HARQ Return Reception Dept. 22.In addition, in order to identify this process sequence number, in course allocation portion 26, by pre-stored in not shown memory etc. to the process sequence number using in process sequence number appendix 17 and the information relevant to its addition method, make dispensing device 1 and receiving system 2 share the addition method of process sequence numbers.

Below, use Fig. 3～Fig. 8 that the action of the MIMO transmission system of the present embodiment of formation described above is described.

First, in dispensing device 1, utilize stream separation unit 11 to become the transmission stream of each antenna sets Tx#i by sending data separating, and utilize respectively corresponding CRC appendix 12 to add CRC code, then utilize coding portion 13 to be encoded into the necessary error correcting codes such as Turbo code, and be input to HARQ transmission processing portion 14.

In HARQ transmission processing portion 14, respectively the transmission stream of inputting from coding portion 13 is carried out to HARQ processing (blocking), as shown in Figure 2, additional process sequence number under the control of process sequence number appendix 17, and preserve this HARQ piece (process), control use in order to retransmitting, and send sending part 15 to.

Thus, sending part 15 is implemented the wireless transmission processing of narrating above to the process of inputting from each HARQ transmission processing portion 14, and sends to receiving system 2 from any transmitting antenna Tx#i.Fig. 3 schematically illustrates this situation.This Fig. 3 represents that the antenna sets of transmission reception use is respectively the situation of n=2, represent antenna sets Tx#1, Tx#2 " antenna identifier " is made as respectively " 0 ", " 1 ", " sequence number " of HARQ piece is made as to 0, 1, 2, to the process sending from antenna sets Tx#1 additional " 0-0 " successively, " 0-1 ", " 0-2 ", such process sequence number, to the process sending from antenna sets Tx#2 additional " 1-0 " successively, " 1-1 ", " 1-2 ", such process sequence number, and send to receiving system 2(with reference in Fig. 3 towards the solid arrow of paper below) situation.

In addition, dispensing device 1 (with reference to the symbol 500 Fig. 3) switch the situation of (being sometimes referred to as below transmission mode switches) as produced from MIMO multiplexing transmission to MIMO diversity transmission is using after the minimizing of antenna sets quantity, identical with above-mentioned explanation, also the addition method that maintains the above-mentioned process sequence number of process sequence number appendix 17, flows transmission.At this, the stream beyond main antenna group Tx#i sends while end, also can omit described antenna identifier, and the transmission of carrying out process receives.Wherein, so-called " main antenna group " refers to maintain the antenna sets (following identical) of use before and after transmission mode is switched, at the example middle finger antenna sets Tx#2 of Fig. 3.

Fig. 4 represents the action flow chart of the dispensing device 1 that comprises this option.; dispensing device 1 utilizes process sequence number appendix 17 according to described additional process sequence number above and flows transmission (step S11); utilize repeating transmission control part 16 to monitor and determine whether and produced transmission mode switching (to the change of MIMO diversity transmission) (step S12); switch (step S12 is "No") if do not produce transmission mode; retransmit control part 16 and control process sequence number appendix 17 and HARQ transmission processing portion 14, send to proceeded to add the stream of process sequence number.

On the other hand, if produced transmission mode switching (step S12 is "Yes"), retransmitting control part 16 determines whether and except main antenna group Tx#i, does not have the data (process) (step S13) that send, if there is (step S13 is "No"), identical with above-mentioned steps S11, control process sequence number appendix 17 and HARQ transmission processing portion 14, so that by process sequence number appendix 17 additional process sequence numbers, and flow transmission (step S14).

On the other hand, if there are not the data (process) (step S13 is "Yes") that send except main antenna group Tx#i, retransmit control part 16 and control process sequence number appendix 17 and HARQ transmission processing portion 14, so that the additional key element of having omitted described process sequence number is the process sequence number of described antenna identifier, and flows transmission (step S15).

On the other hand, in receiving system 2, utilize signal to separate/synthesize portion 21 according to the control from course allocation portion 26, the signal being received is separated according to each process, and distribute to the either party in each HARQ Return Reception Dept. 22 by each reception antenna Rx#i.

In HARQ Return Reception Dept. 22, respectively the receiving process that separates/synthesize portion 21 from this signal is stored together with process sequence number, use in order to retransmitting synthetic processing, retransmit the repeating transmission process synthetic (not retransmitting process, directly exporting receiving process) of the same process sequence number of coming by stored process with from dispensing device 1.

Then, in corresponding CRC operational part 23, the receiving process of exporting from HARQ Return Reception Dept. 22 is implemented to CRC computing, generate the confirmation answer signal corresponding with this operation result (ack signal or NACK signal) by ACK/NACK detection unit 24, this signal is fed back to dispensing device 1(with reference to the arrow above paper in Fig. 3 via transmitting antenna ATT).Wherein, ACK/NACK detection unit 24 makes this confirmation answer signal comprise antenna identifier or process sequence number.

In addition, for the normal process of above-mentioned CRC operation result, the process that receives stream in the synthetic portion 25 of stream by itself and other is synthetic, and exports as the data that normally received, for the abnormal process of CRC operation result, be not input in the synthetic portion 25 of stream and discarded.

In addition, in dispensing device 1, control process sequence number appendix 17 and HARQ transmission processing portion 14, if to receive ack signal as confirming answer signal from receiving system 2, send new process, if receive NACK signal, retransmitting in receiving system 2 is abnormal process.In addition, determine the process of new process/should retransmit according to the antenna identifier comprising in the confirmation answer signal receiving or process sequence number.

Thus, the identical process of process sequence number when HARQ transmission processing portion 14 also retransmits process sequence number and last time sent in the time of the process of repeating transmission, receiving system 2 is by the identification of the receiving process sequence number of course allocation portion 26, the distribution control of receiving process, as switched to the non-MIMO multiplexing transmission such as MIMO diversity transmission or MIMO single transport from MIMO multiplexing transmission time, even if send fluxion amount (number of transmit antennas) variation, also can in HARQ Return Reception Dept. 22, carry out the synthetic of correct process.

For example, consider that the timing that utilizes symbol 500 to represent has produced to the switching of MIMO diversity transmission in Fig. 3, it is antenna sets Tx#2 that number of transmit antennas is reduced to 1(from 2) situation, no matter receiving system 2 receives the repeating transmission process dual arrow of paper below (with reference to the Fig. 3 towards) of which process sequence number after this switching from dispensing device 2, can both carry out the distribution of correct process by course allocation portion 26, and carry out synthetic between synthetic, the process that process sequence number is identical of correct process., can prevent the destruction (can solve foregoing problems 1) of synthetic conformability.

And, study according to the answering method of 1,2 couples of ACK/NACK of the situation of the following stated, also can solve thus foregoing problems 2, the mistake that produces process in dispensing device 1 is retransmitted the problem that makes to retransmit the process that should retransmit.

(situation 1) receives the situation (Fig. 5, Fig. 6) of ack/nack signal by timing adjustment

Fig. 5 is illustrated in the schematic diagram that is equivalent to Fig. 3 in this situation 1.As shown in Figure 5, even if producing after transmission mode switching (to the change of MIMO diversity transmission) (reference marks 500), receiving system 2 also utilizes the antenna identifier of (adding) each antenna sets, confirms the reply of answer signal (ack/nack signal).At this, the meaning of " utilization " antenna identifier does not refer to that additional antenna identifier is replied ack/nack signal expressly, even and if refer to for example in the time that main antenna group is confirmed as one, dispensing device is also indicated the frequency band of the ack/nack signal of each antenna sets to receiving system, receiving system utilizes this frequency band to reply ACK/NACK.Therefore, dispensing device, in the time receiving ack/nack signal, is analyzed its frequency band, and just can identify is the ACK/NACK for which antenna sets.On the other hand, the meaning of " adding " antenna identifier as shown in Figure 5, refers to ack/nack signal additional antenna identifier expressly.

For example, in Fig. 5, if focus on produce transmission mode switch after be Tx#2 from the antenna sets Tx#1(main antenna group of dispensing device 1) send process " 0-2 ", receiving system 2 utilize ACK/NACK detection unit 24 to generate to have added the sequence number key element (part) of this receiving process " 0-2 " be the signal of antenna identifier " 0 " as the confirmation signal of replying for this process " 0-2 ", reply to dispensing device 1.

Thus, dispensing device 1 with and receiving system 2 between at least just synchronize (for the reply timing acquisition of confirmation answer signal of the process of transmission, dispensing device 1 by and receiving system 2 between timing adjustment carry out confirmation of receipt answer signal) for prerequisite, can utilize repeating transmission control part 16 to identify described confirmation answer signal for process " 0-2 ", thereby can not retransmit mistakenly process " 1-2 ", can correctly retransmit process " 0-2 " from main antenna group Tx#2.

In addition, in the case of dispensing device 1 according to omission antenna identifier noted earlier carry out process transmission receive (can transmit the whole processes outside main antenna group Tx#2), for the reply of confirming to reply, even if sending, omission antenna identifier confirms to reply, owing to having carried out timing adjustment, be the confirmation answer signal for which process so dispensing device 1 also can identify.

Fig. 6 represents the action flow chart of the receiving system 2 in this situation 1.

; receiving system 2 monitors and determines whether and produced transmission mode switching (to the change of MIMO diversity transmission) (step S21); switch (step S21 is "No") if do not produce transmission mode; generating the sequence number key element of having added receiving process by ACK/NACK detection unit 24 is the confirmation answer signal of antenna identifier, and replies to dispensing device 1.In the time that this confirmation answer signal is NACK signal, keep receiving process by HARQ Return Reception Dept. 22, synthetic with (step S22) in order to retransmitting.

On the other hand, in the time having produced transmission mode switching (step S21 is "Yes"), receiving system 2 utilizes course allocation portion 26 to carry out the separation (identification of process sequence number) (step S23) of receiving process, determines whether and is attached with antenna identifier (step S24).Result, if be attached with antenna identifier (step S24 is "Yes"), receiving system 2 is identical with the situation of above-mentioned steps S22, the sequence number key element that generation has added receiving process is the confirmation answer signal of antenna identifier, and reply to dispensing device 1, and in the time that this confirmation answer signal is NACK signal, keep receiving process by HARQ Return Reception Dept. 22, synthetic with (step S25) in order to retransmitting.

On the other hand, in the time there is no additional antenna identifier (step S24 is "No"), receiving system 2 is owing to having carried out timing adjustment, omit antenna identifier so confirm the reply of replying, and reply to dispensing device 1, and in the time that this confirmation answer signal is NACK signal, keep receiving process by HARQ Return Reception Dept. 22, synthetic with (step S26) in order to retransmitting.

Like this, this situation 1 time, as long as produced transmission mode switching (to the change of MIMO diversity transmission), need to be at each antenna sets Tx#i(Rx#i) between identify each transmission process, just to confirm answer signal only the information element of additional receiving process sequence number be antenna identifier, its amount of information is suppressed to Min. and replies to dispensing device 1 simultaneously, can transmit main antenna group Tx#2 whole processes in addition, if at each antenna sets Tx#i(Rx#i) between do not need to identify each transmission process, omit the additional of this antenna identifier, so can realize effective utilization of the Radio Resource between dispensing device 1 and receiving system 2.

(situation 2) expressly additional process sequence number replys the situation (Fig. 7, Fig. 8) of ack/nack signal

Fig. 7 represents the schematic diagram that is equivalent to Fig. 3, Fig. 5 in this situation.As shown in Figure 7, even if producing after transmission mode switching (to the change of MIMO diversity transmission) (reference marks 500), owing to not carrying out timing adjustment between dispensing device and receiving system, thus receiving system 2 expressly additional process sequence number reply ACK/NACK.

For example, this situation 2 times, in Fig. 7, if focusing on after having produced transmission mode and switching is Tx#2 from the antenna sets Tx#1(main antenna group of dispensing device 1) process " 0-2 " that sends, receiving system 2 utilizes signal that ACK/NACK detection unit 24 generates the process sequence number of having added this receiving process " 0-2 " as the confirmation answer signal for this process " 0-2 ", replies to dispensing device 1.

Thus, no matter between dispensing device 1 and receiving system 2 whether just for the reply timing acquisition of the confirmation answer signal of the process of transmission synchronously, can both utilize repeating transmission control part 16 to identify described confirmation answer signal is the reply (being the reply for process " 0-2 " in this example) for which process of which antenna sets Tx#i, thereby can wrong repeating transmission process " 1-2 ", can correctly retransmit process " 0-2 " from main antenna group Tx#2.

Fig. 8 represents the action flow chart of the receiving system 2 in this situation 2.

; receiving system 2 monitors and determines whether and produced transmission mode switching (to the change of MIMO diversity transmission) (step S31); switch (step S31 is "No") if do not produce transmission mode; generate by ACK/NACK detection unit 24 the confirmation answer signal that has added receiving process sequence number, and reply to dispensing device 1.In the time that this confirmation answer signal is NACK signal, keep receiving process by HARQ Return Reception Dept. 22, synthetic with (step S32) in order to retransmitting.

On the other hand, in the time having produced transmission mode switching (step S31 is "Yes"), the separation (identification of process sequence number) (step S33) that receiving system 2 carries out receiving process by course allocation portion 26, determines whether and is attached with antenna identifier (step S34).Result, if be attached with antenna identifier (step S34 is "Yes"), receiving system 2 is identical with the situation of above-mentioned steps S32, additional receiving process sequence number is also replied and is confirmed answer signal to dispensing device 1, and in the situation that this confirmation answer signal is NACK signal, keep receiving process by HARQ Return Reception Dept. 22, synthetic with (step S35) in order to retransmitting.

On the other hand, in the situation that there is no additional antenna identifier (step S34 is "No"), , dispensing device 1 can transmit the whole processes beyond main antenna group Tx#i, and omit antenna identifier and carry out in the situation of transmission reception of process, owing to can omitting the additional of antenna identifier, so receiving system 2 is additional antenna identifier not, utilize the sequence number (the process sequence number identical with the mode in the past of having omitted antenna identifier) of main antenna group Tx#2 to reply and confirm answer signal to dispensing device 1, and in the time that this confirmation answer signal is NACK signal, keep receiving process by HARQ Return Reception Dept. 22, synthetic with (step S36) in order to retransmitting.

Like this, in the time of this situation 2, as long as produced transmission mode switching (to the change of MIMO diversity transmission), need to be at each antenna sets Tx#i(Rx#i) between identify each transmission process, just to confirming that the additional receiving process sequence number of answer signal replies to dispensing device 1, even so in the case of and receiving system 2 between just do not have to synchronize for the reply timing acquisition of the confirmation answer signal of the process of transmission, also can in dispensing device 1, correctly identify the process that retransmit, can suppress reliably the mistake of the process of retransmitting and retransmit.

And, in the time of this situation 2, can transmit main antenna group Tx#2 whole processes in addition, if need to be at each antenna sets Tx#i(Rx#i) between identify transmission process, omit the additional of this transmitting antenna, so can realize effective utilization of the Radio Resource between dispensing device 1 and receiving system 2.

(B) explanation of the 2nd execution mode

Fig. 9 is block diagram structure, that be equivalent to Fig. 2 of the MIMO transmission system that represents that the 2nd execution mode of the present invention relates to, MIMO transmission system shown in this Fig. 9 (dispensing device 1 and receiving system 2) is compared with the structure shown in Fig. 2 with Fig. 1, difference is, process sequence number appendix 17A and the 26A of course allocation portion is set and replaces process sequence number appendix 17 and the course allocation portion 26 narrated above.In addition, other structures are identical or the same with the structure of utilizing Fig. 1 and Fig. 2 to narrate, in Fig. 9, identical with Fig. 2, omit respectively the diagram of a part (the synthetic portion 25 of CRC operational part 22 and stream) for a part (stream separation unit 11, CRC operational part 12 and coding portion 13) for the inscape of dispensing device 1 and the inscape of receiving system 2.

At this, this routine process sequence number appendix 17A is to the HARQ piece (process) obtaining in HARQ transmission processing portion 14, with all not having competitive mode independence additional process sequence number between antenna sets Tx#i, for example, can consider the addition method shown in following (1) or (2).

(1) as shown in Figure 9, additional according to ascending order (can be also descending) from antenna sets Tx#1 to antenna sets Tx#n, after the process sequence number of having determined for the stream of last antenna sets Tx#n, again start the method for ascending order ground additional process sequence number from initial antenna sets Tx#1., whole antenna sets Tx#i are repeated the method for additional a series of process sequence numbers.For example, utilize Bit String to be expressed as " ... 00000 " for the process sequence number of antenna sets Tx#1, process sequence number for antenna sets Tx#n is expressed as " ... 00111 ", and the process sequence number after antenna sets Tx#1 is expressed as " ... 01000 ", the process sequence number after antenna sets Tx#n is expressed as " ... 01111 ".

(2) as shown in figure 10, each antenna sets Tx#i is added independently the method for a series of process sequence numbers of (not competition) according to ascending order (can be also descending).For example, the process sequence number of antenna sets Tx#1 be " ... 00000～... 00111 ", the process sequence number of antenna sets Tx#2 be " ... 01000～... 01111 ", the process sequence number of antenna sets Tx#3 be " ... 10000～... 11111 ".

; this routine process sequence number appendix (control unit) 17A is in order to realize additional control identical with the 1st execution mode, do not have competitive process sequence number between stream; also performance is by the effect of group serial number gencration portion; by a series of serial number information according to each flow point group; for this each stream, the serial number information in corresponding group offers HARQ transmission processing portion 14 as the process sequence number (data block identifying information) that should append in transmission process.

In addition, no matter, in which kind of situation of above-mentioned (1) and (2), for fear of the problem identical with the 1st execution mode, all need between dispensing device 1 and receiving system 2, share the addition method of process sequence number.

; in order to identify this process sequence number; in the 26A of course allocation portion of receiving system 2; pre-stored process sequence number and the information relevant to this addition method using in process sequence number appendix 17A in not shown memory etc. shares the addition method of process sequence number between dispensing device 1 and receiving system 2.Thus, the 26A of course allocation portion can identify the process sequence number of receiving process, and separate/synthesize that signal in portion 21 separates and synthetic processing according to this process sequence number control signal, this receiving process is distributed and inputs to the either party in each HARQ Return Reception Dept. 22.

Below, use in the lump Figure 11～Figure 14 that the action of the MIMO transmission system of the present embodiment of formation described above is described.

First, in dispensing device 1, send the transmission that data are flowed separation unit 11 and be separated into each antenna sets Tx#i and flow, and added CRC code by corresponding CRC appendix 12 respectively, then the portion 13 that is encoded is encoded into the error correcting code that Turbo code etc. is necessary, and inputs HARQ transmission processing portion 14.

In HARQ transmission processing portion 14, respectively the transmission stream of inputting from coding portion 13 is carried out to HARQ processing (blocking), as shown in Fig. 9 or Figure 10, additional that provided by process sequence number appendix 17A, between antenna sets Tx#i, do not have a competitive process sequence number (the step S41 of Figure 12), and keep this HARQ piece (process) to control use in order to retransmitting, and send sending part 15 to.

Thus, sending part 15 is implemented the wireless transmission processing of narrating above to the process of inputting from each HARQ transmission processing portion 14, and sends to receiving system 2 from any transmitting antenna Tx#i.Figure 11 schematically illustrates this situation.This Figure 11 is the figure that is equivalent to Fig. 3 of the 1st execution mode, represent that the antenna sets that sends reception use is respectively n=2, and be suitable for the situation of the addition method shown in Fig. 9, show the process attached Plus "0" successively to sending from antenna sets Tx#1, " 2 ", the even number process sequence number that " 4 " are such, the process sending from antenna sets Tx#2 is added successively and independently (do not had competitive) for the process sequence number of antenna sets Tx#1, " 1 ", " 3 ", the odd number process sequence number that " 5 " are such, and send to receiving system 2(with reference in Fig. 9 towards the solid arrow of paper below) situation.

In addition, in the present embodiment, even if dispensing device 1 after using antenna sets quantity to reduce as (with reference to the symbol 500 of Figure 11) situation that has produced transmission mode switching, also same as described above, maintain the addition method of the above-mentioned process sequence number of process sequence number appendix 17A, and flow transmission.

In receiving system 2, for example in situation shown in Figure 11, receive process " 4 " and process " 5 ", can identify each process sequence number by the 26A of course allocation portion, and distribute to correct antenna sets Rx#i.Therefore,, even if produced transmission mode switching, also can carry out synthetic between the process synthetic, i.e. same process sequence number of correct process by HARQ Return Reception Dept. 22., can prevent the destruction (can solve foregoing problems 1) of synthetic conformability.

And, identical with the 1st execution mode in the present embodiment, shown in following situation 1,2, the answering method of ACK/NACK is studied, also can solve thus foregoing problems 2, the mistake that produces process in dispensing device 1 is retransmitted the problem that the process that should retransmit can not be retransmitted.

(situation 1) receives the situation (Figure 13) of ack/nack signal by timing adjustment

Receiving system 2 is having produced after transmission mode switching (to the change of MIMO diversity transmission) (with reference to the symbol 500 in Figure 11), as the 1st execution mode 1, utilize the antenna identifier of (adding) each antenna sets, confirm the reply of answer signal (ACK/NACK).At this, the meaning of " utilization " and " adding " antenna identifier is identical with the 1st execution mode.

In addition, switching to after MIMO diversity, in the 1st execution mode, meaning and receive while thering is no the process of additional antenna identifier sequence number when receiving system, only sending the process of autonomous antenna sets.But, in the 2nd embodiment, due to not to the process sequence number additional antenna identifier receiving, so through certain period when (T), 1 of dispensing device is from main antenna group (referring to antenna sets Tx#2 Figure 11) transmission process.Therefore, after elapsed time T, the reply that receiving system 2 is replied for confirmation can be omitted antenna identifier, can only utilize the timing information of main antenna group to reply and confirm answer signal to dispensing device 1.

Figure 13 represents the action flow chart of the receiving system 2 in this situation 1.

As shown in Figure 13, receiving system 2 monitors and determines whether and produced transmission mode switching (to the change of MIMO diversity transmission) (step S51), switch (step S51 is "No") if do not produce transmission mode, generate utilization by ACK/NACK detection unit 24 and (added) the confirmation answer signal of antenna identifier, and reply to dispensing device 1.In addition, in the time that this confirmation answer signal is NACK signal, keep receiving process by HARQ Return Reception Dept. 22, synthetic with (step S52) in order to retransmitting.

On the other hand, in the time having produced transmission mode switching (step S51 is "Yes"), receiving system 2 utilizes the 26A of course allocation portion to carry out the separation (identification of process sequence number) (step S53) of receiving process, and determines whether through time T (step S54).Result, if there is no elapsed time T(step S54 is "No"), receiving system 2 is identical with the situation of above-mentioned steps S52, generate and utilize the confirmation answer signal that (has added) antenna identifier, and reply to dispensing device 1, and in the time that this confirmation answer signal is NACK signal, keep receiving process by HARQ Return Reception Dept. 22, synthetic with (step S55) in order to retransmitting.

On the other hand, if passed through time T (step S54 is "Yes"), receiving system 2 utilizes the timing information of main antenna group, reply and confirm answer signal to dispensing device 1, and in the time that this confirmation answer signal is NACK signal, keep receiving process by HARQ Return Reception Dept. 22, synthetic with (step S56) in order to retransmitting.

Like this, this situation 1 time, in the time having produced transmission mode switching (to the change of MIMO diversity transmission), as long as need to be at each antenna sets Tx#i(Rx#i) between identify each transmission process, just utilize (adding) each antenna identifier, reply and confirm answer signal to dispensing device 1, can transmit main antenna group Tx#2 whole processes in addition, if need to be at each antenna sets Tx#i(Rx#i) between identify each transmission process, can only utilize the timing information of main antenna group to reply and confirm to reply, so can realize effective utilization of the Radio Resource between dispensing device 1 and receiving system 2.

(situation 2) expressly additional process sequence number replys the situation (Figure 14) of ack/nack signal

Even if receiving system 2 is having produced after transmission mode switching (to the change of MIMO diversity transmission) (with reference to the symbol 500 in Figure 11), also additional process sequence number is replied ACK/NACK expressly.For example, in Figure 11, if focusing on after having produced transmission mode and switching is Tx#2 from the antenna sets Tx#1(main antenna group of dispensing device 1) process " 4 " that sends, receiving system 2 utilizes signal that ACK/NACK detection unit 24 generates the process sequence number of having added this receiving process " 4 " as the confirmation signal of replying for this process " 4 ", replies to dispensing device 1.

Thus, it is the reply (being the reply for process " 4 " in this example) for which process of which antenna sets Tx#i that dispensing device 1 can utilize repeating transmission control part 16 to identify described confirmation answer signal, thereby can wrong repeating transmission process " 5 ", can correctly retransmit process " 4 " from main antenna group Tx#2.

In addition, this situation 2 times, after producing transmission mode and switching, if passed through certain period (T), 1 of dispensing device sends process from main antenna group, but after elapsed time T, dispensing device 2 can not omit process sequence number and carry out transmission process.This situation 2 times, after producing transmission mode and switching, even send process through certain period (T), 1 of dispensing device from main antenna group, also different from situation 1, can not obtain Timing Synchronization, confirm to reply so need additional process sequence number to reply.

Figure 14 represents the action flow chart of the receiving system 2 in this situation 2.

; receiving system 2 monitors and determines whether and produced transmission mode switching (to the change of MIMO diversity transmission) (step S61); switch (step S61 is "No") if do not produce transmission mode; generate by ACK/NACK detection unit 24 the confirmation answer signal that has added receiving process sequence number, and reply to dispensing device 1.In addition, in the time that this confirmation answer signal is NACK signal, keep receiving process by HARQ Return Reception Dept. 22, synthetic with (step S62) in order to retransmitting.

On the other hand, in the time having produced transmission mode switching (step S61 is "Yes"), receiving system 2 utilizes the 26A of course allocation portion to carry out the separation (identification of process sequence number) (step S63) of receiving process, no matter whether passed through time T, all generate the confirmation answer signal that has added receiving process sequence number, and reply to dispensing device 1, and in the time that this confirmation answer signal is NACK signal, keep receiving process by HARQ Return Reception Dept. 22, synthetic with (step S66) in order to retransmitting.

Like this, this situation 2 times, in the time having produced transmission mode switching (to the change of MIMO diversity transmission), as long as need to be at each antenna sets Tx#i(Rx#i) between identify each transmission process, all to confirming that the additional receiving process sequence number of answer signal replies to dispensing device 1, even so in the case of and receiving system 2 between just do not have to obtain and synchronize for the reply timing of the confirmation answer signal of the process of transmission, also can in dispensing device 1, correctly identify the process that retransmit, can suppress reliably the mistake of the process of retransmitting and retransmit.

(C) explanation of the 3rd execution mode

In the above-mentioned the 1st and the 2nd execution mode, for the addition method of process sequence number, show and adding according to the mode that can not compete between each antenna sets, even thus in the situation that switching to non-MIMO multiplexing transmission from MIMO multiplexing transmission, also can carry out the synthetic of correct process, the mistake that prevents process is retransmitted, and can continue without interruption the transmission of flowing, but in the present embodiment, even show according to each antenna sets, process sequence number is appended to independently send stream in existing PARC or precoding in also can make flow transmission continue without interruption the method communicating.

In the present embodiment, focus at first when having produced transmission mode and switching, produce wrong situation about retransmitting because residue in the antenna sets beyond the main antenna group has process.Therefore, in order to prevent wrong repeating transmission, when for example switch to MIMO diversity transmission from MIMO multiplexing transmission, according to remaining process (not sending process) amount in the antenna sets beyond main antenna group, make the constant time lag (for example, after the transmission of residue process all finishes, implementing this switching) of this switching (the minimizing control of fluxion amount).

Communications status between dispensing device 1 and receiving system 2 when Figure 15 represents to be suitable for the method.At Fig. 5 and Fig. 7, Tu11Zhong, detect receiving system 2 from MIMO multiplexing transmission region 302(with reference to Figure 26) while moving to non-MIMO multiplexing transmission region (MIMO diversity region) 301,303, in dispensing device 1, implemented the switching (reference marks 500) to MIMO diversity transmission at once.

On the other hand, in Figure 15, even above-mentioned movement (regional change) detected in the timing that utilizes symbol 600 to represent, owing to there being residue process " 2 " in antenna sets Tx#1 at this time point, so dispensing device 1 is proceeded MIMO multiplexing transmission, for example from MIMO multiplexing transmission to the switching of MIMO diversity transmission be in fact, after the end of transmission of residue process " 2 " (timing that utilizes symbol 700 to represent).Thus, even unlike the 1st execution mode and the 2nd execution mode, use special process sequence number addition method, also can be by more simply controlling, in the time that generation pattern is switched, interrupt flow does not transmit and proceeds to communicate by letter.

But, in the method, before the repeating transmission success of residue process " 2 ", can not switch to MIMO diversity.Therefore, example as shown in figure 16, except the switching threshold (about the threshold value A of wireless quality) of MIMO diversity transmission, has process also to switch to the threshold value (about the threshold value B<A of wireless quality) of MIMO diversity even if residue is also set.And dispensing device 1 is in the time that the wireless quality of receiving system (mobile radio station) 2 is between threshold value A and threshold value B, if there is residue process, proceed MIMO multiplexing transmission, if wireless quality, lower than threshold value B,, no matter have or not remaining data, all switches to MIMO diversity transmission.

In addition, above function for example can be mounted for a function of the repeating transmission control part 16 of narrating above, also can be mounted for independently control part (transmission mode switching timing control part).And, for example can utilize the known method that the reception quality information such as SIR and CQI measured by receiving system 2 is fed back to dispensing device 1 etc., make dispensing device 1 can grasp the wireless quality of receiving system 2 (following identical).

(D) explanation of the 4th execution mode

At this, identical with the 3rd above-mentioned execution mode, be illustrated according to each antenna sets process sequence number is appended in the PARC in the past sending in stream independently, continue without interruption to carry out the additive method of flow transmission.

In present embodiment 4, also identical with the 3rd execution mode, focus on while producing transmission mode switching, because having process, residue in the antenna sets beyond main antenna group produces wrong situation about retransmitting.; when carry out pattern switching from MIMO multiplexing transmission to non-MIMO multiplexing transmission (MIMO diversity transmission); be greater than the threshold value (threshold value A) of switching at the wireless quality of receiving system 2; but be less than other threshold values (threshold value C) (being threshold value C> threshold value A > threshold value B); and do not send in the situation of data (process) in main antenna group antenna sets in addition; dispensing device 1 does not wait for that wireless quality reaches below threshold value A, and just switches to MIMO diversity transmission after this time point.

Figure 17 represents the setting example of above-mentioned threshold value A, C.And Figure 18 represents to be suitable for dispensing device 1 in the situation of this routine method and the communications status between receiving system 2.

Following situation shown in Figure 18: detecting that receiving system 2 moves from MIMO multiplexing transmission region to non-MIMO multiplexing transmission region (MIMO diversity region) (reference marks 600), dispensing device 1 receives for the NACK signal of the process of antenna sets Tx#1 " 2 " (with reference to dotted arrow 610), so repeating transmission of generation process " 2 ", after the ack signal (with reference to solid arrow 620) of having replied to dispensing device 1 for this repeating transmission process, whole residue processes of transmitting antenna group Tx#1 at once.After not remaining the time point of process like this, if the wireless quality of receiving system 2 between threshold value A and threshold value C, dispensing device 1 switches to MIMO diversity transmission at once in the timing that utilizes symbol 700 to represent.

In addition, above function for example can be mounted for a function of the repeating transmission control part 16 of narrating above, also can be mounted for independently control part (transmission mode switching timing control part).And, as long as above-mentioned threshold value A, threshold value B, threshold value C meet and be related to threshold value C> threshold value A > threshold value B, just can set simultaneously.

Utilizability in industry

Specifically narrating as above, according to the present invention, in wireless communication system, even in the case of the transport stream number change (minimizing) between dispensing device and receiving system, also can maintain the conformability of the data block of retransmitting synthetic object, can normally proceed communication, so exceedingly useful in wireless communication technology field.

Claims (1)

1. a mobile terminal, wherein, this mobile terminal comprises:

The 1st receiving element, it receives multiple data blocks from having the base station of multiple antennas;

The 2nd receiving element, it is by control channel from described base station receiving process information, and described progress information prevents from competing between described multiple data blocks; And

Synthesis unit, it is according to described progress information, by synthetic to the described data block having received and retransmitted data blocks.

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