CN103873206B - Mobile terminal - Google Patents

Abstract

A kind of mobile terminal, wherein the mobile terminal includes: the 1st receiving unit, receives multiple data blocks from the base station with mutiple antennas；2nd receiving unit, by control channel from the base station receiving process information, the progress information prevents from competing between the multiple data block；Synthesis unit synthesizes the received data block with retransmitted data blocks according to the progress information.

Description

Mobile terminal

The application be based on the 42nd article of Patent Law detailed rules for the implementation proposition, be the applying date be on October 27th, 2006, application No. is Application for a patent for invention " transfer control method and sending device and reception dress in wireless communication system of 200680056206.X Set " divisional application.

Technical field

The present invention relates to a kind of mobile terminals, more particularly to be suitable for MIMO (Multi Input Multi Output, it is more Input multi output) transmission repeating transmission control technology.

Background technique

About mobile communication system such as portable phones, currently based on CDMA (Code Division Multiple Access, CDMA access) third generation mode of mode has begun service, and is promoting with OFDMA It is real based on (Orthogonal Frequency Division Multiple Access, orthogonal frequency-time multiple access) mode The research of the next generation mobile communication system now more rapidly communicated (referring to the non-patent literature 1 described below).

Therefore, as the technology for keeping transmission rate rapid, MIMO is suggested as strong technology.Figure 19 indicates MIMO The overview of Transmission system.Mimo transmission system shown in the Figure 19 is configured to include: with multiple transmission antennas (antenna sets) Tx# 1, Tx#2 ..., the sending device 100 of Tx#n (n be 2 or more integer)；With with multiple receiving antennas (antenna sets) Rx#1, Rx#2 ..., the reception device 200 of Rx#n, which is from each transmission antenna Tx#i (i=1~n) transmitted in parallel Different data flow, the spatial multiplexing transmission technology to proportionally increase transmission capacity with transmission antenna quantity n.Different Transmission antenna Tx#i is configured to non-correlation each other, and the data flow sent from each transmission antenna Tx#i passes through independent respectively Decline transmission path, is received antenna Rx#i with the state mixed in space with other data flows and receives.

As the implementation example of this mimo transmission system, as shown in figure 20, such as has and each antenna is independently flowed The method of processing.For example, PARC (the Per Antenna Rate without precoding (Precoding) can be enumerated Control, the control of each Antenna Rate) (referring to the non-patent literature 2 described below) and carry out the PSRC (Per of precoding Stream Rate Control, each stream rate control) (referring to the non-patent literature 3 described below) etc..

In particular, in system shown in the Figure 20, such as sending device 100 is configured to includes flow separation portion 101, each CRC appendix 102, coding unit 103 and the HARQ processing unit 104, transmission unit 105 and repeating transmission control unit 106 for sending stream, receive Device 200 is for example configured to include Signal separator/combining unit 201, the HARQ processing unit 202 of each receiving stream and CRC operation portion 203, ACK/NACK determination unit 204 and stream combining unit 205.In addition, ATR indicates that the receiving antenna of sending device 100, ATT indicate The transmission antenna of reception device 200 for convenience, shows from transmission antenna ATT in this example and sends ACK/NACK (Acknowledgement/Negative Acknowledgement) signal (confirmation answer signal), and by receiving antenna ATR The case where reception.

Also, sending device (hereinafter also referred to sending side) 100 is for example acted according to flow chart shown in Figure 21, receives dress (hereinafter also referred to receiving side) 200 is set for example to act according to flow chart shown in Figure 22.

That is, sending the transmission stream that data are separated into each antenna sets Tx#i by flow separation portion 101 in sending device 100 (step A1), by CRC appendix 102 to the CRC (Cyclic of the transmission stream additional error detection of each antenna sets Tx#i Redundant Check, cyclic redundancy check) code (step A2) counted in coding unit 103 to correct bit-errors According to the coding of stream, in order to retransmit control, HARQ (Hybrid Automatic Repeat is carried out in HARQ processing unit 104 ReQuest (step A4)) is handled, selection is transmitted the transmission antenna Tx#i of HARQ block (process) and adjusted in transmission unit 105 System, is then sent to reception device 200.Here, each process can be selected when using precoding (when step A5 is "Yes") Multiple transmission antenna Tx#i are selected, but are sent out (when step A5 is "No") from predetermined transmission antenna Tx#i in PARC It send.

On the other hand, it in reception device 200, as shown in figure 22, is connect in the signal sent from sending device 100 by each After receiving antenna Rx#i reception, the separation/synthesis (step B1) of the reception signal is carried out via Signal separator/combining unit 201, is determined Whether the signal (process) received is repeating transmission process (step B2).If the result is that the process of repeating transmission (step B2 is "Yes"), connects Signal that receiving apparatus 200 is received this using HARQ processing unit 202 and the previous same process for receiving and keeping connect The collection of letters number synthesis (step B3).The CRC being attached in each process is checked using CRC operation portion 203, it is thus wrong to detect bit Accidentally (step B4).In addition, when the process that this is received is not repeating transmission process (step B2 is "No"), without HARQ processing The synthesis in portion 202, and bit-errors detection (step B4) is carried out by CRC operation portion 203.

Also, when detecting bit-errors in ACK/NACK determination unit 204 (step B5 be "Yes"), holding receive into Journey simultaneously replys NACK signal (step B6) to sending device 100 using transmission antenna ATT, (the step when not detecting mistake B5 is "No"), ack signal is replied to sending device 100 using transmission antenna ATT, and process is transmitted to upper layer (step B7).It is exported after the reception signal of each stream of mistake is finally synthesized by stream combining unit 205 in addition, not detecting.

In this series of processes, critical function needed for high-speed traffic is HARQ.HARQ is to be combined with automatic retransmit to ask Seek the ARQ mode of (ARQ) and Error Correction of Coding (FEC:Forward Error Correction, forward error correction).In particular, Sending side 100 carries out Error Correction of Coding to the parity check bit of block of information bits additional error detection, and send its all or A part.When generating repeating transmission, all or part of in the coded-bit for current block is retransmitted.

Synthesis processing is carried out in corresponding each bit of the receiving side 200 to existing block each in retransmission blocks, uses its knot The Synthetic block that fruit obtains carries out error correction and error detection processing again.In this way, receiving side 200 repeats to sending side 100 ACK/NACK is replied and decoding process based on repeating transmission retries, until the mistake of the block in scheduled upper limit numbers range disappears It removes.

In next-generation mobile communicating, (reference describes especially suitable N-channel Stop-and-Wait ARQ below Non-patent literature 4).Here, N indicates integer, the block number (process number) that can be sent simultaneously is indicated.About simultaneously send into Journey carries out the control of the repeating transmission based on Stop and Wait to each process.

The overview of Figure 23 expression N-channel Stop-and-Wait ARQ.

Each process is sent in the unit interval (TTI:Transmission Time Interval) of wireless transmission, And it is identified using this identifier of process serial number N.The case where process number (0~4) N=5 is shown in the Figure 23, therefore quite In the 5-channel Stop-and-Wait ARQ the case where.In addition, in Figure 23 for convenience, to the data portion of each process Point additional process serial number is to indicate, but actually process serial number is sent by control channel, the data portion of each process It is not attached to process serial number.That is, process serial number is subsidiary (same as below) sent in the data portion of each process.

After reception device 200 receives process from sending device 100, error detection recited above is carried out.In this, it is assumed that In process 0~4, process " 1 ", " 3 ", " 4 " generate mistake, and process " 0 ", " 2 " do not generate mistake, for no generation mistake Process " 0 ", " 2 ", to sending device 100 reply ack signal, for produce mistake process " 1 ", " 3 ", " 4 ", storing Holding process in device (illustration omitted) then replys NACK signal to sending device 100.The reply of ack/nack signal is also logical Control channel transmission is crossed, but does not need reply process serial number when the situation.

Reception device 200 adjusts the turnaround time timing of each process and replys ack/nack signal, thus sending device 100 can identify it is the ack/nack signal for being directed to which process.Carried out after sending device 100 receives ack signal newly into The transmission of journey, but process serial number at this time can arbitrarily add it is including at the time of additional process serial number, past 5 into There is no used process serial number (in Figure 23, to carry out additional process sequence according to the ascending order of original process serial number in journey Number).

On the other hand, it after sending device 100 receives NACK, carries out producing the repeating transmission of the process of mistake, at this time Process serial number is attached serial number identical with previous process serial number.After retransmission, reception device 200 identifies process serial number, Judgement should be synthesized with which process.That is, when receiving repeating transmission process i.e. process " 1 ", " 3 ", " 4 ", respectively and with preceding The process " 1 " of the identical process serial number kept when secondary transmission NACK signal, " 2 ", " 3 " are grouped synthesis.It examines in post synthesis CRC is looked into, when without mistakenly receiving, replys ACK to sending device 100.On the other hand, it when producing mistake, protects Process after holding synthesis replys NACK signal to sending device 100 again.

In addition, about synthetic method there are two types of representative method, any synthetic method is can be used in the present invention.One Kind is identical data when repeating transmission was sent with before when retransmitting, by reception signal when sending in the past and connecing when retransmitting Collect mail number synthesis, and carry out should decoded data generation, another kind be retransmit when change encode after data contraction Mode (puncturing pattern), and send not sent up to now bit, reception signal when by former sending and Reception signal synthesis when repeating transmission, reduces equivalent encoding rate, improves error correcting capability (coding gain).The technology of the latter is referred to as IR (Incremental Redundancy, steadily increase redundancy).

This process processing is unrelated with the similarities and differences of PARC and precoding that front describes all to be done in the same fashion.Cause This, continues to explain by taking PARC as an example below.

Figure 24 indicates N-channel Stop-and-Wait when sending device 100 and reception device 200 correspond to PARC The case where ARQ.

As previously described, in PARC, CRC is additional, encode, HARQ processing is independently carried out for each antenna, institute Independent serial number is also attached with HARQ process serial number.In Figure 24, indicate sent from transmission antenna Tx#1 process " 1 ", " 3 ", " 4 " and the case where generate repeating transmission from the process " 1 " that transmission antenna Tx#2 is sent (referring to dotted arrow).In such case Under, as previously described, HARQ is carried out for each antenna sets, so independently carrying out repeating transmission control to each antenna sets.In addition, into The addition method of program number is additional according to rule identical with Figure 23.

Also, in the MIMO transmission of next-generation mobile body communication system, in order to be sent between transmission antenna Tx#i Data-signal separation/synthesis, 100 transmission antenna identification signal of sending device (such as pilot signal and scrambling code).

Figure 25 indicates the pilot signal additional example when transmission antenna of sending device 100 is two.In such as Figure 25 (1) and shown in (2), with same time sequence, different frequency sequence additional pilot signal between each antenna sets Tx#1, Tx#2 (R:Reference Symbol).Reception device 200 is by referring to pilot signal, from the antenna sets Rx#1 by reception device 200 The signal of separate antenna group Tx#1 in received signal, separates from the antenna sets Rx#2 received signal by reception device 200 The signal of antenna sets Tx#2 restores the stream (process) sent after synthesizing each signal.And in general, antenna sets and pilot tone are believed Number corresponding relationship sent using notification information.

Non-patent literature 1: " 3GPP TR25.913 V7.3.0 Requirements for Evolved UTRA (E- UTRA)and Evolved UTRAN(E-UTRAN)(Release 7),”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 TR25.814 V7.4.0 Physical Layer Aspects for evolved Universal Terrestrial Radio Access(UTRA)(Release 7),”3GPP(France),2006-06

About the communication environment for being applicable in mimo transmission system, such as cell structure shown in Figure 26 can be enumerated.That is, according to The form of MIMO transmission is divided into a cell form in region, as shown in Figure 26 (1), is located at base station 300 in movement station 400 Inside region (MIMO multiplexing transmission region) 302 when, carry out MIMO multiplexing transmission and (spread using two in Figure 26 (1) It is defeated), when being located at lateral area (non-MIMO multiplexing transmission region) 303, it is (sharp in Figure 26 (1) to carry out non-MIMO multiplexing transmission It is spread with one defeated).In addition, so-called " non-MIMO multiplexing transmission " for example refers to MIMO diversity transmission and carries out one using an antenna The MIMO patrilineal line of descent with only one son in each generation of the transmitting-receiving of a stream is defeated.

Also, as shown in Figure 26 (2), even if there is also in MIMO multiplexing transmission region 302, but at movement station 400 Carried out in region 301 near the base station 300 view it is logical in the case where communication, but carry out non-MIMO multiplexing transmission (in Figure 26 (2) Middle utilization one is spread defeated) the case where.This is because it is related between generating antenna when communication in view is logical, so in reception device It is difficult to carry out the separation/synthesis of signal in 200, it is possible to can not achieve heavy traffic.

In this case, without MIMO multiplexing transmission near base station 300 in region 301, and with height Modulation rate, high code-rate carry out non-MIMO multiplexing transmission, and this method would be possible to realize heavy traffic.

In this way, be not the fixed applicable MIMO multiplexing transmission in a cell, but it is in place according to the institute of movement station 400 It sets, is also suitable non-MIMO multiplexing transmission sometimes.For example, movement station 400 wireless quality (such as movement station 400 report to base Stand 300 SN ratio average value) be greater than some threshold value when, carry out MIMO multiplexing transmission, be less than the threshold value when carry out non-MIMO Multiplexing transmission.

At this point, stream quantity is reduced to a stream from multiple streams, such as each antenna sets are independently being added as PARC In the method for process serial number, when flowing quantity reduction, the process serial number of HARQ repeats (competition), it is possible to cause to continue to lead to Letter.

For example, Figure 27 indicates movement example when being switched to MIMO diversity transmission from MIMO multiplexing transmission in PARC.It should The case where example expression flows back to multiple ack/nack signal using one.

From the antenna sets Tx#1 and antenna sets Tx#2 of sending device 100 according to regularly sent shown in Figure 27 process " 0 ", " 1 ", " 2 " are being replied from reception device 200 to sending device 100 for the process sent from each antenna sets Tx#1, Tx#2 After the ack signal of " 0 ", " 1 ", the timing indicated in Figure 27 using symbol 500, the position of movement station 400 is from Figure 26 institute The MIMO multiplexing transmission region 302 shown is moved to non-MIMO multiplexing transmission region (MIMO diversity transmission region) 301 or 303.

At this point, being sent out if the primary antenna group of the sending device 100 of the processing of the stream flowed into is set as antenna sets Tx#2 Device 100 is sent to be sent in the process " 2 " for being switched to and being stored before MIMO diversity transmission from antenna sets Tx#1 and Tx#2.Receive dress It sets 200 and receives these signals using antenna sets Rx#1 and Rx#2, carry out the synthesis of signal and construct process " 2 ".Then, dress is received It sets 200 trials progress to synthesize with the grouping of the process " 2 " kept when previous transmission, but generates following problems herein.

(problem 1) reception device 200 cannot identify that repeating transmission process " 2 " should be synthesized with which process of holding.That is, for example Shown in Figure 28, reception device 200 retransmits process " 2 " by MIMO diversity reception, but as previously described, is only having viewed process sequence Number come in the case where being grouped synthesis, since antenna sets Rx#1 and antenna sets Rx#2 remains process " 2 " respectively, so cannot Judgement is synthesized with which process.Assuming that the feelings synthesized in the process (reference marks 601) attempted with kept by primary antenna group Rx#2 Under condition, by the process " 2 " of the process " 2 " (reference marks 602) of antenna sets Rx#1 and the antenna sets Rx#2 indicated using symbol 601 It is grouped synthesis, so that the conformability of synthesis is destroyed.

In addition, also generating following problems.

(problem 2) generates the repeating transmission of mistake shown in following situation 1,2 in sending device 100.

The case where (situation 1) reply by time timing adjustment to carry out ack/nack signal

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

Figure 29 indicates its overview.Reception device 200 replys ACK/ by the time timing adjustment of primary antenna group Rx#2 NACK signal.At this point, sending device 100 receives reply using the timing information of primary antenna group Tx#2.When the situation, such as Figure 29 Shown, sending device 100 receives the timing and the repeating transmission of the process " 2 " of the antenna sets Tx#2 indicated using symbol 603 of reply Timing coincidence, should retransmitting antenna group Tx#1 process " 2 ", it is likely that the mistakenly process of retransmitting antenna group Tx#2 "2".At this time, it is impossible to the process " 2 " of retransmitting antenna group Tx#1.

(situation 2) is not using time timing adjustment but is carried out the reply of ack/nack signal using process serial number Situation

The situation refers to the case where reply that ACK/NACK is executed without timing adjustment.Therefore, different from situation 1, no Reply the instruction of timing adjustment, but needs additional process serial number when replying ACK/NACK.

Figure 30 indicates its overview.Reception device 200 expresses process serial number from primary antenna group Rx#2 and replys ACK/NACK letter Number.It is replied at this point, being received by antenna sets Tx#2.At this point, as shown in figure 30, receiving the process for antenna sets Tx#1 When the reply of " 2 ", sending device 100 is erroneously interpreted as being the NACK signal for the process " 2 " of antenna sets Tx#2.Therefore, It is unable to the process " 2 " of retransmitting antenna group Tx#1.

In this way, following problems will be generated when generating the repetition of process serial number in each antenna sets, in reception device 200 In not can determine that and will be synthesized between the process of which antenna sets, on the other hand, in sending device 100 generate process mistake It accidentally retransmits, prevent the process that should be retransmitted is from retransmitting.

Also, confirmation response (ack/nack signal) is replied flowing to sending device 100 using two from reception device 200 When, it also leads to the problem of identical as the above problem.Figure 31 and Figure 32 indicate such case.That is, such as scheming in reception device 200 Shown in 28, not can determine that repeating transmission process " 2 " should with closed respectively by which process that antenna sets Rx#1 and antenna sets Rx#2 are kept At.Also, led to the problem of in sending device 100 with above with the identical problem of Figure 29 and Figure 30 narration.

That is, when being switched to MIMO diversity transmission from MIMO multiplexing transmission,

(1) in the case where the confirmation response replied from reception device 200 is replied from antenna sets Rx#2, such as Figure 31 institute Show, reply ack/nack signal from the transmission antenna ATT2 of reception device 200, but when the situation, the movement of sending device 100 with Situation shown in Figure 29 and Figure 30 is identical, so leading to the process " 2 " of mistakenly retransmitting antenna group Tx#2, and is unable to retransmitting antenna The process " 2 " of group Tx#1,

(2) in the case where the confirmation response replied from reception device 200 is replied by MIMO diversity, such as Figure 32 institute Show, ack/nack signal is replied from transmission antenna ATT1 and ATT2, so 100 diversity reception of sending device is by receiving antenna ATR1 The signal replied with ATR2, but since primary antenna group is antenna sets Tx#2, so it is for antenna sets Tx# that finally they, which are determined, 2 reply.Therefore, lead to the process " 2 " of mistakenly retransmitting antenna group Tx#2, and be unable to the process " 2 " of retransmitting antenna group Tx#1.

Summary of the invention

The present invention is exactly to propose in view of the above problems, it is intended that being such as switched to from MIMO multiplexing transmission The case where MIMO diversity transmission, is such, in the case where transport stream quantity changes (reduction), is also able to maintain that process serial number (flows Identification) conformability, can continue to normally be communicated.

In order to achieve the above object, the invention is characterized in that using the transfer control method in following wireless communication systems And sending device and reception device.That is,

(1) first method of the transfer control method in wireless communication system of the invention is characterized in that, can be from Sending device with multiple transmission antennas transmits the channel radio of multiple flow datas with scheduled data block unit to reception device In letter system, which is attached between the flow data each flow data of the multiple flow data respectively does not have The data block is sent to the reception device by the data block identification information of competition, and the reception device is according to from the sending device Reception data block in the attached data block identification information, to the reception number for being attached with identical block identification information It carries out retransmitting synthesis processing according to block and retransmitted data blocks.

(2) here, the sending device can also be using the information comprising antenna identifier as the data block identification information It is attached in the data block, the antenna identifier is for the relevant identifier of transmission antenna for sending the flow data.

(3) also, a series of serial number information can also be grouped by the sending device according to each flow data, and be pressed According to each flow data, the serial number information in corresponding group is attached in the data block as the data block identification information.

(4) in addition, the reception device can also add the data block to for the repeating transmission request for receiving data block Repeating transmission request is sent to the sending device by identification information, and the sending device is when receiving repeating transmission request, utilization The data block that the additional data block identification information is identified in repeating transmission request is retransmitted as the retransmitted data blocks Give the reception device.

(5) second method of the transfer control method also, in wireless communication system of the invention is characterized in that, in energy In enough wireless communication systems for transmitting multiple flow datas from the sending device with multiple transmission antennas to reception device, the transmission Device detects the reduction governing factor of the fluxion data bulk, when detecting the reduction governing factor, according to about reduction The not sent data volume of the flow data of control object makes the reduction of the fluxion data bulk control constant time lag.

(6) here, the sending device can also implement the reduction control after transmission of the not sent data System.

(7) also, the sending device can also monitor the wireless quality between the reception device, in the wireless quality When lower than scheduled threshold value, even if the transmission of the remaining data is not over, also implement the reduction control.

(8) in addition, the sending device can also monitor the wireless quality between the reception device, if described wireless The remaining data for reducing the flow data of object is not present lower than the time point of predetermined threshold for quality, then at the time point described in implementation Flow the reduction control of quantity.

(9) also, sending device of the invention be can be from the sending device with multiple transmission antennas with scheduled number The sending device in the wireless communication system of multiple flow datas is transmitted to reception device according to block unit, the feature of the sending device exists In, comprising: data block identification information extra cell, according to each flow data of the multiple flow data, to the data Block added block identification information；Transmission unit has been attached the data block identification information to reception device transmission Data block；And control unit, the data block identification information extra cell is controlled, so that additional to the data block described Data block identification information does not compete between each flow data.

(10) here, the control unit is also configured to antenna identifier generating unit, which is generated Portion is using the information of the antenna identifier comprising the transmission antenna for the data flow as the number that should be attached to the data flow According to the data block identification information in block, and it is supplied to the data block identification information extra cell.

(11) also, the control unit is also configured to be somebody's turn to do and press by a group serial number gencration portion with by a group serial number gencration portion A series of serial number information is grouped according to each data flow, and according to each data flow, the serial number in corresponding group is believed Breath is supplied to the data block identification information extra cell as the data block identification information that should be attached in the data block.

(12) in addition, the sending device can also also have retransmit control unit, when from the reception device receive by Attached the data block identification information, when being requested for the repeating transmission for receiving data block, repeating transmission control unit is benefit It is retransmitted with the data block that the data block identification information is identified and gives the reception device.

(13) also, reception device of the invention be can be from the sending device with multiple transmission antennas with scheduled number The reception device in the wireless communication system of multiple flow datas is transmitted to reception device according to block unit, which is characterized in that the reception Device includes receiving unit, and reception attached by the sending device according to each flow data of the multiple flow data The data block not sent after competitive data block identification information between the flow data；With repeating transmission synthesis unit, root Data block identification information attached in data block is received according to by the receiving unit is received, is identified to identical block is attached with The data accepted block and retransmitted data blocks of information carry out retransmitting synthesis processing.

(14) in addition, the reception device can also have repeating transmission request transmitting unit, the repeating transmission request transmitting unit pair The data block identification information is added for the repeating transmission request for receiving data block, and repeating transmission request is sent to the transmission Device.

Invention effect

Following effect or advantage can be at least obtained according to aforementioned present invention.

Even if that is, being switched to non-MIMO multiplexing transmission (MIMO diversity transmission) from MIMO multiplexing transmission in such as transmission mode The case where transport stream quantity like that between sending device and reception device change (reduction) when, between transport stream The competition of data block identification will not be generated, so can be avoided in the mistake repeating transmission and reception device of the sending device of data block Mistake synthesis.Therefore, it can continue to normally be communicated and (spread defeated) between sending device and reception device.

Detailed description of the invention

Fig. 1 is the block diagram for indicating the structure of mimo transmission system of the first embodiment of the invention.

Fig. 2 is the process indicated together for illustrating the process serial number addition method in mimo transmission system shown in FIG. 1 The block diagram of an example of serial number.

Fig. 3 is the figure for illustrating the movement of the retransmission process in mimo transmission system shown in FIG. 1.

Fig. 4 is the flow chart for illustrating the movement of the sending device in mimo transmission system shown in FIG. 1.

Fig. 5 is the figure for illustrating the answering method of the ACK/NACK in mimo transmission system shown in FIG. 1 (situation 1).

Fig. 6 is the flow chart for illustrating the movement of the reception device in mimo transmission system shown in FIG. 1 (situation 1).

Fig. 7 is the figure for illustrating the answering method of the ACK/NACK in mimo transmission system shown in FIG. 1 (situation 2).

Fig. 8 is the flow chart for illustrating the movement of the reception device in mimo transmission system shown in FIG. 1 (situation 2).

Fig. 9 is the structure and process serial number for showing mimo transmission system of the second embodiment of the invention together The block diagram of an example.

Figure 10 is shown together for illustrating other process serial number addition methods in mimo transmission system shown in Fig. 9 The block diagram of an example of process serial number.

Figure 11 is the figure for illustrating the movement of the retransmission process in mimo transmission system shown in Fig. 9.

Figure 12 is the flow chart for illustrating the movement of the sending device in mimo transmission system shown in Fig. 9.

Figure 13 is the flow chart for illustrating the movement of the reception device in mimo transmission system shown in Fig. 9 (situation 1).

Figure 14 is the flow chart for illustrating the movement of the reception device in mimo transmission system shown in Fig. 9 (situation 2).

Figure 15 is for illustrating that the retransmission process in mimo transmission system of the third embodiment of the invention acts Figure.

Figure 16 is the figure for illustrating MIMO transmission switching method of the third embodiment.

Figure 17 is the figure for illustrating MIMO transmission switching method of the fourth embodiment of the invention.

Figure 18 is the figure for illustrating the movement of the retransmission process in mimo transmission system of the fourth embodiment.

Figure 19 is the sketch map of mimo transmission system.

Figure 20 is the side for indicating the topology example of sending device and reception device in mimo transmission system shown in Figure 19 Block diagram.

Figure 21 is the flow chart for the movement of the sending device in mimo transmission system shown in explanatory diagram 20.

Figure 22 is the flow chart for the movement of the reception device in mimo transmission system shown in explanatory diagram 20.

Figure 23 is the summary for showing the N-channel Stop-and-Wait ARQ in mimo transmission system shown in Figure 20 Figure.

Figure 24 is indicated when sending device in mimo transmission system shown in Figure 20 and reception device correspond to PARC The figure of the case where N-channel Stop-and-Wait ARQ.

Figure 25 is the figure for indicating the pilot signal additional example in mimo transmission system shown in Figure 20.

Figure 26 is to indicate the exemplary block diagram of the cell structure of mimo transmission system.

Figure 27 is for illustrating that movement when being switched to MIMO diversity transmission from MIMO multiplexing transmission in PARC is exemplary Figure.

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

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

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

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

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

Label declaration

1 sending device (base station)；11 flow separation portions；12 CRC appendix；13 coding unit；14 HARQ transmissions processing Portion's (data block identification information extra cell)；15 transmission units；16 retransmit control unit；17,17A process serial number appendix (control Unit: antenna identifier generating unit presses a group serial number gencration portion)；2 reception devices (movement station)；21 Signal separators/combining unit (receiving unit)；22 HARQ reception processing units (retransmit synthesis unit)；23 CRC operational parts；24 ACK/NACK determination units (retransmitting request transmitting unit)；25 stream combining units；26,26A process serial number dispenser；Tx#1, Tx#2 ..., Tx#n send day Line (antenna sets)；Rx#1, Rx#2 ..., Rx#n receiving antenna (antenna sets)；ATT transmission antenna；ATR receiving antenna.

Specific embodiment

Hereinafter, being described with reference to embodiments of the present invention.But the present invention is not limited to following implementation, certainly It can carry out without departing from the spirit and scope of the present invention various modifications and implement.

(A) explanation of the 1st embodiment

Fig. 1 is the block diagram for indicating the structure of mimo transmission system of the first embodiment of the invention, Fig. 1 institute The mimo transmission system shown be configured to include: with multiple transmission antennas (antenna sets) Tx#1, Tx#2 ..., at least 1 of Tx#n Sending device 1；With with multiple receiving antennas (antenna sets) Rx#1, Rx#2 ..., at least 1 reception device 2 of Rx#n.In addition, Sending device 1 for example may be used as the transmission system of base station apparatus, and reception device 2 may be used as the reception system of mobile station apparatus System.Also, transmission antenna quantity and receiving antenna quantity in this example, are set as identical quantity (n), however, you can also not same.

Also, sending device 1 is when focusing on its major part, such as is configured to include flow separation portion 11, each transmission CRC appendix 12, coding unit 13, HARQ transmission processe department 14, transmission unit 15, repeating transmission control unit 16 and the process serial number of stream are added Portion 17, reception device 2 is when focusing on its major part, such as is configured to include Signal separator/combining unit 21, each receiving stream HARQ reception processing unit 22 and CRC operation portion 23, ACK/NACK determination unit 24, stream combining unit 25 and process serial number dispenser 26.In addition, ATR indicates that the receiving antenna of sending device 1, ATT indicate the transmission antenna of reception device 2 in the Fig. 1, in order to Convenient for explanation, response (ack/nack signal) is confirmed to send from the transmission antenna ATT of reception device 2 using a stream, and by The receiving antenna ATR of sending device 1 is received premised on the confirmation response (ack/nack signal).

Here, flow separation portion 11 is separated into transmission data-signal the transmission of each antenna sets Tx#i in sending device 1 Stream, CRC appendix 12 is respectively to the CRC code for sending stream additional error detection, and coding unit 13 is respectively being attached this The transmission stream encryption of CRC code is the necessary error correcting codes such as Turbo code.

HARQ transmission processe department 14, which respectively flows transmission according to each process serial number, to be carried out HARQ processing (block) and transmits It is temporarily held in memory (not shown) to transmission unit 15, and the HARQ block (process), uses, send in case retransmitting control Portion 15 for the process that is inputted from each HARQ transmission processe department 14 implement include based on necessary modulation system (such as QPSK or 16QAM, 64QAM etc.) modulation, DA conversion, to the necessary of the frequency conversion (up-conversion) of wireless frequency (RF) signal etc. Wireless transmission processing, and reception device 2 is sent to from any one transmission antenna Tx#i.

It retransmits control unit 16 and carries out following control: according to by the received ACK/ from reception device 2 of receiving antenna ATR NACK signal determines a need for retransmitting, if necessary to retransmit, it is determined that the antenna sets Tx#i and process that should be retransmitted, from The corresponding process that preservation is read in the memory of the corresponding HARQ transmission processe department 14 of antenna sets Tx#i of object is retransmitted, and Send transmission unit 15 to.In addition, about the antenna sets Tx#i and process that should be retransmitted as being described below, such as can be with The timing adjustment of the ack/nack signal described according to front or for ack/nack signal process serial number express come really It is fixed.

Also, process serial number appendix 17 is additional to each HARQ block (data block) in each HARQ transmission processe department 14 Process serial number is supplied to the information with this format of (antenna identifier)+(serial number) as process serial number in this example HARQ transmission processe department 14, thus the letter for not competing (repetition) (between each transmission stream) between each antenna sets Tx#i Breath, i.e. transmission stream identifier are attached in transmission stream.For example, as shown in Figure 2 schematically like that, being attached to antenna sets Tx#1 Transmission stream in process serial number can be expressed as " 0...00xxx " using Bit String, be attached to the transmission stream of antenna sets Tx#2 In process serial number be expressed as " 0...01yyy ", be attached to antenna sets Tx#n transmission stream in process serial number be expressed as " 1...11zzz " (wherein, x, y, z is 0 or 1) respectively.After sending device 1 adds this independent process serial number, filled to receiving It sets 2 transmission and sends stream.

That is, HARQ transmission processe department 14 plays the effect of data block identification information extra cell, respectively in multiple streams Each stream, be additional to process serial number (data block identification information) in process (data block), process serial number appendix 17 send out The effect of control unit is waved, controls HARQ transmission processe department 14 so that the process serial number being attached in the process is in each stream Between do not compete, in addition, the process serial number appendix 17 also plays the effect of antenna identifier generating unit together, including The information of the antenna identifier of transmission antenna Tx#i about stream is supplied to as the process serial number in the process for being attached to the stream HARQ transmission processe department 14.

On the other hand, in reception device 2, Signal separator/combining unit 21 according to the control from process dispenser 26, From each transmission antenna Tx#i (i=1~n) send and be spatially multiplexed, by each receiving antenna Rx#i received signal by It is separated according to each process, diversity synthesis processing is able to carry out in MIMO diversity, HARQ reception processing unit 22 is by being somebody's turn to do The receiving stream (process) that Signal separator/combining unit 21 obtains is stored together with process serial number, is used in case retransmitting synthesis processing, And the process of storage is synthesized with the repeating transmission process of the same process serial number from sending device 1.

That is, above-mentioned Signal separator/combining unit 21 plays the effect of receiving unit, receive by sending device 1 to each Stream attached the process for do not send after competitive process serial number (serial number information comprising antenna identifier) between streams, HARQ reception processing unit 22 plays the effect for retransmitting synthesis unit, according to by the Signal separator as the receiving unit/synthesize Additional process serial number in the received receiving process in portion 21, to the receiving process and repeating transmission process for being attached same process into Row retransmits synthesis processing.

CRC operation portion 23 implements CRC operation to the receiving stream obtained by HARQ reception processing unit 22 respectively, to carry out mistake Erroneous detection is looked into, and ACK/NACK determination unit 24 generates confirmation answer signal according to the CRC operation result, and sends from transmission antenna ATT (feedback) gives sending device 1, in particular, generating ack signal when CRC operation result indicates normal (OK) and feeding back to hair Device 1 is sent, when CRC operation result indicates abnormal (NG), NACK signal is generated and feeds back to sending device 1.

Wherein, the ACK/NACK determination unit 24 of this example is as it is explained in detail hereinafter, can be to confirmation answer signal (ACK/NACK letter Number) a part (antenna identifier) or whole (process serial number) of the process serial number information is added, and it is sent to sending device 1.That is, the ACK/NACK determination unit 24 of this example plays the effect for retransmitting request transmitting unit, to the repeating transmission for being directed to receiving process Request (NACK signal) additional antenna identifier or process serial number are simultaneously sent to sending device 1.

It flows combining unit 25 to synthesize the stream that the CRC operation result in each CRC operation portion 23 is OK, and defeated as data are received Out.

Also, process dispenser 26 identifies the process serial number of receiving process, controls Signal separator/conjunction according to the process serial number At in portion 21 Signal separator and synthesis processing, which is distributed and is inputed in each HARQ reception processing unit 22 Either.In addition, in process dispenser 26, will be used in process serial number appendix 17 to identify the process serial number Process serial number and information relevant to its addition method be stored in advance in memory (not shown) etc., make 1 He of sending device Reception device 2 shares the addition method of process serial number.

Hereinafter, illustrating the movement of the mimo transmission system of present embodiment formed as described above using Fig. 3~Fig. 8.

Firstly, becoming the hair of each antenna sets Tx#i for data separating is sent using flow separation portion 11 in sending device 1 Stream is sent, and is utilized respectively corresponding CRC appendix 12 to add CRC code, is then encoded into Turbo code using coding unit 13 Etc. necessary error correcting code, and it is input to HARQ transmission processe department 14.

In HARQ transmission processe department 14, HARQ processing (block) is carried out to the transmission stream inputted from coding unit 13 respectively, As shown in Fig. 2, the additional process serial number under the control of process serial number appendix 17, and the HARQ block (process) is saved, in case weight Hair control is used, and sends transmission unit 15 to.

Transmission unit 15 implements the wireless transmission that front describes to the process inputted from each HARQ transmission processe department 14 as a result, Processing, and reception device 2 is sent to from any one transmission antenna Tx#i.Fig. 3 schematically illustrates the situation.The Fig. 3 indicates to send The case where antenna sets of reception are respectively n=2, expression are set to " antenna identifier " of antenna sets Tx#1, Tx#2 " 0 ", " 1 ", " serial number " of HARQ block is set as 0,1,2 ..., the process sent from antenna sets Tx#1 is successively added " 0-0 ", " 0-1 ", " 0-2 " ... such process serial number successively adds " 1-0 ", " 1-1 ", " 1- to the process sent from antenna sets Tx#2 2 " ... such process serial number, and be sent to reception device 2 (referring in Fig. 3 towards the solid arrow below paper) the case where.

In addition, sending device 1 (is hereinafter sometimes referred to passed in such as generation from MIMO multiplexing transmission to the switching of MIMO diversity transmission Defeated pattern switching) the case where like that (referring to the symbol 500 in Fig. 3) after being reduced using antenna sets quantity, with above description phase Together, the addition method for also maintaining the above-mentioned process serial number of process serial number appendix 17, carries out stream transmission.Here, in primary antenna group At the end of stream other than Tx#i is sent, it also can be omitted the antenna identifier, carry out the transmitting and receiving of process.Wherein, so-called " primary antenna group ", which refers to, maintains the antenna sets (same as below) used before and after transmission mode switching, refers to antenna in the example of fig. 3 Group Tx#2.

Fig. 4 indicates the action flow chart of the sending device 1 comprising this option.That is, sending device 1 is attached using process serial number Add portion 17 according to additional process serial number described above and carry out stream transmission (step S11), monitors and sentence using repeating transmission control unit 16 It is fixed whether to produce transmission mode switching (change to MIMO diversity transmission) (step S12), if not generating transmission mode Switching (step S12 is "No"), then retransmit control unit 16 and control process serial number appendix 17 and HARQ transmission processe department 14, so as to The stream for continuing attached process serial number is sent.

In contrast, it if producing transmission mode switching (step S12 is "Yes"), retransmits control unit 16 and determines whether The data that send (process) (step S13) is not present other than primary antenna group Tx#i, if there is (step S13 is "No"), then it is identical as above-mentioned steps S11, process serial number appendix 17 and HARQ transmission processe department 14 are controlled, will pass through process 17 additional process serial number of serial number appendix, and carry out stream transmission (step S14).

On the other hand, if the data that send (process) are not present other than primary antenna group Tx#i, (step S13 is "Yes"), then it retransmits control unit 16 and controls process serial number appendix 17 and HARQ transmission processe department 14, so as to described in additional be omitted The element of process serial number, that is, antenna identifier process serial number, and carry out stream transmission (step S15).

On the other hand, in reception device 2, using Signal separator/combining unit 21 according to the control from process dispenser 26 System, will be separated by each receiving antenna Rx#i received signal according to each process, and distribute to each receiving area HARQ Either in reason portion 22.

In HARQ reception processing unit 22, respectively by receiving process and process sequence from the Signal separator/combining unit 21 It number stores, is used in case retransmitting synthesis processing together, retransmit the process stored and from sending device 1 the same process sequence to come Number repeating transmission process synthesis (in the case where no repeating transmission process, directly output receiving process).

Then, CRC fortune is implemented to the receiving process exported from HARQ reception processing unit 22 in corresponding CRC operation portion 23 It calculates, confirmation answer signal (ack signal or NACK signal) corresponding with the operation result is generated by ACK/NACK determination unit 24, it will The signal feeds back to sending device 1 via transmission antenna ATT (towards the arrow above paper in reference Fig. 3).Wherein, ACK/ NACK determination unit 24 makes the confirmation answer signal include antenna identifier or process serial number.

In addition, for the above-mentioned normal process of CRC operation result, in stream combining unit 25 by it with other receiving streams into Cheng Hecheng, and as the data output being received normally, for the process of CRC operation results abnormity, it is not input to stream combining unit It is discarded in 25.

In addition, control process serial number appendix 17 and HARQ transmission processe department 14 in sending device 1, if so as to from connecing Receiving apparatus 2 receives ack signal as confirmation answer signal and then sends new process, if receiving NACK signal, retransmits It is abnormal process in reception device 2.In addition, according to the antenna identifier or process that include in the confirmation answer signal received Serial number determines the process of new process/should retransmit.

HARQ transmission processe department 14 also retransmits process serial number and process serial number when previous transmission in the process of repeating transmission as a result, Identical process, reception device 2 are controlled by the identification of the receiving process serial number of process dispenser 26, the distribution of receiving process, When as being switched to MIMO diversity transmission or the MIMO patrilineal line of descent with only one son in each generation non-MIMO multiplexing transmission such as defeated from MIMO multiplexing transmission, even if hair It send stream quantity (transmission antenna quantity) to change, the synthesis of correct process can be also carried out in HARQ reception processing unit 22.

For example, it is contemplated that producing the switching to MIMO diversity transmission using the timing that symbol 500 indicates in Fig. 3, send Antenna amount from 2 be reduced to 1 (only antenna sets Tx#2) the case where, no matter reception device 2 is after this switching from sending device 2 The repeating transmission process (towards the double arrows below paper in reference Fig. 3) for receiving which process serial number, can pass through process Dispenser 26 carries out the distribution of correct process, and carries out the synthesis of correct process, i.e. between the identical process of process serial number Synthesis.I.e., it is possible to prevent the destruction (can solve foregoing problems 1) of the conformability of synthesis.

Also, as described below the case where answering method of 1,2 couple of ACK/NACK is studied, and thus also can solve Foregoing problems 2, i.e., the mistake that process is generated in sending device 1 are retransmitted so that asking for the process that should be retransmitted cannot be retransmitted Topic.

(situation 1) is by timing adjustment come (Fig. 5, Fig. 6) the case where receiving ack/nack signal

Fig. 5 indicates the schematic diagram for being equivalent to Fig. 3 in the situation 1.As shown in Fig. 5, even if producing transmission mould After formula switches (change to MIMO diversity transmission) (reference marks 500), reception device 2 also utilizes (additional) each antenna sets Antenna identifier carries out the reply of confirmation answer signal (ack/nack signal).Here, the meaning of " utilization " antenna identifier is not Refer to that expressly additional antenna identifier replys ack/nack signal, even and if refer to and be for example confirmed as one in primary antenna group When a, sending device also indicates reception device the frequency band of the ack/nack signal of each antenna sets, and reception device utilizes the frequency It brings and replys ACK/NACK.Therefore, sending device analyzes its frequency band when receiving ack/nack signal, and just can identify is For the ACK/NACK of which antenna sets.On the other hand, the meaning of " additional " antenna identifier is as shown in figure 5, refer to ACK/ NACK signal expressly additional antenna identifier.

Such as in Fig. 5, generate after transmission mode switches if focused on from (the main day antenna sets Tx#1 of sending device 1 Line group is Tx#2) send process " 0-2 ", then reception device 2 using ACK/NACK determination unit 24 generation attached the reception into The serial number element (a part) i.e. of journey " 0-2 " signal of antenna identifier " 0 " is as the response confirmation letter for being directed to the process " 0-2 " Number, reply to sending device 1.

Sending device 1 is as a result, with the reply between reception device 2 at least with regard to the confirmation answer signal for transmission process Before timing acquisition synchronous (that is, sending device 1 receives confirmation answer signal by the timing adjustment between reception device 2) is It mentions, can identify the confirmation answer signal for process " 0-2 ", thus will not be mistakenly using control unit 16 is retransmitted Repeating transmission process " 1-2 " can correctly be retransmitted process " 0-2 " from primary antenna group Tx#2.

In addition, the case where sending device 1 omits transmitting and receiving of the antenna identifier to carry out process as described above Under (in the case where whole processes except primary antenna group Tx#2 can be transmitted), for confirm response reply, even if omit Antenna identifier sends confirmation response, due to having carried out timing adjustment, so it is for which that sending device 1, which also can recognize that, The confirmation answer signal of a process.

Fig. 6 indicates the action flow chart of the reception device 2 in the situation 1.

That is, reception device 2 monitors and determines whether to produce transmission mode switching (change to MIMO diversity transmission) (step Rapid S21), if not generating transmission mode switching (step S21 is "No"), attached by the generation of ACK/NACK determination unit 24 Serial number element, that is, antenna identifier confirmation answer signal of receiving process, and reply to sending device 1.Believe in the confirmation response Number be NACK signal when, by HARQ reception processing unit 22 keep receiving process, in case retransmit synthesis use (step S22).

On the other hand, when producing transmission mode switching (step S21 is "Yes"), reception device 2 is distributed using process Portion 26 carries out the separation (identification of process serial number) (step S23) of receiving process, determines whether to be attached with antenna identifier (step S24).As a result, if the case where being attached with antenna identifier (step S24 is "Yes"), reception device 2 and above-mentioned steps S22 It is identical, the confirmation answer signal that attached the i.e. antenna identifier of serial number element of receiving process is generated, and reply to sending device 1, and when the confirmation answer signal is NACK signal, receiving process is kept by HARQ reception processing unit 22, is closed in case retransmitting At with (step S25).

In contrast, in no additional antenna identifier (step S24 is "No"), reception device 2 is due to being determined When adjust, so antenna identifier is omitted in the reply of confirmation response, and reply to sending device 1, and believe in the confirmation response Number be NACK signal when, by HARQ reception processing unit 22 keep receiving process, in case retransmit synthesis use (step S26).

In this way, in the situation 1, as long as producing transmission mode switching (change to MIMO diversity transmission), needing Between each antenna sets Tx#i (Rx#i) each transmission process is identified, just to confirmation answer signal only additional receptive process serial number Its information content is suppressed to minimum limit while replying to sending device 1, can transmit main day by information element, that is, antenna identifier Whole processes other than line group Tx#2, if not needing to identify each transmission process between each antenna sets Tx#i (Rx#i), Then omit the additional of the antenna identifier, it is possible to realize the effective of the radio resource between sending device 1 and reception device 2 It utilizes.

(situation 2) expressly additional process serial number come (Fig. 7, Fig. 8) the case where replying ack/nack signal

Fig. 7 indicates the schematic diagram for being equivalent to Fig. 3, Fig. 5 in this case.As shown in Fig. 7, even if producing transmission mould After formula switches (change to MIMO diversity transmission) (reference marks 500), due to not having between sending device and reception device It is timed adjustment, so expressly additional process serial number replys ACK/NACK to reception device 2.

For example, in Fig. 7, being produced after transmission mode switches if focused on from sending device 1 in the situation 2 The process " 0-2 " that antenna sets Tx#1 (primary antenna group is Tx#2) is sent, then reception device 2 is generated using ACK/NACK determination unit 24 The signal of the process serial number of the receiving process " 0-2 " be attached as the confirmation answer signal for being directed to the process " 0-2 ", replied to Sending device 1.

As a result, no matter whether just for the confirmation answer signal of transmission process between sending device 1 and reception device 2 Timing acquisition synchronization is replied, can identify which antenna the confirmation answer signal is for using control unit 16 is retransmitted The reply (being the reply for process " 0-2 " in this example) of which process of group Tx#i, thus will not wrong repeating transmission process " 1- 2 ", it can correctly be retransmitted from primary antenna group Tx#2 process " 0-2 ".

Fig. 8 shows the action flow charts of the reception device 2 in the situation 2.

That is, reception device 2 monitors and determines whether to produce transmission mode switching (change to MIMO diversity transmission) (step Rapid S31), if not generating transmission mode switching (step S31 is "No"), attached by the generation of ACK/NACK determination unit 24 The confirmation answer signal of receiving process serial number, and reply to sending device 1.When the confirmation answer signal is NACK signal, by HARQ reception processing unit 22 keeps receiving process, in case retransmitting synthesis uses (step S32).

On the other hand, when producing transmission mode switching (step S31 is "Yes"), reception device 2 is distributed by process Portion 26 carries out the separation (identification of process serial number) (step S33) of receiving process, determines whether to be attached with antenna identifier (step S34).As a result, if the case where being attached with antenna identifier (step S34 is "Yes"), reception device 2 and above-mentioned steps S32 Identical, additional receptive process serial number simultaneously replys confirmation answer signal to sending device 1, and is NACK in the confirmation answer signal In the case where signal, receiving process is kept by HARQ reception processing unit 22, in case retransmitting synthesis uses (step S35).

In contrast, in the case where no additional antenna identifier (step S34 is "No"), that is, sending device 1 can Whole processes other than primary antenna group Tx#i are transmitted, and in the case where omitting transmitting and receiving of the antenna identifier to carry out process, Since the additional of antenna identifier can be omitted, so the not additional antenna identifier of reception device 2, utilizes primary antenna group Tx#2's Serial number (process serial number identical with the previous mode of antenna identifier is omitted) replys confirmation answer signal to sending device 1, And when the confirmation answer signal is NACK signal, receiving process is kept by HARQ reception processing unit 22, in case retransmitting synthesis With (step S36).

In this way, in the situation 2, as long as producing transmission mode switching (change to MIMO diversity transmission), needing Each transmission process is identified between each antenna sets Tx#i (Rx#i), just back and forth to confirmation answer signal additional receptive process serial number Again to sending device 1, so even if not having between reception device 2 just for the reply of the confirmation answer signal of transmission process In the case that timing acquisition is synchronous, the process that retransmit can be also correctly identified in sending device 1, can reliably be pressed down The mistake of repeating transmission process processed is retransmitted.

Also, in the situation 2, whole processes other than primary antenna group Tx#2 can be transmitted, if you do not need to each Transmission process is identified between antenna sets Tx#i (Rx#i), then the additional of the transmission antenna is omitted, so can be realized sending device 1 The effective use of radio resource between reception device 2.

(B) explanation of the 2nd embodiment

Fig. 9 is side indicating the structure of mimo transmission system of the second embodiment of the invention, being equivalent to Fig. 2 Block diagram, the mimo transmission system (sending device 1 and reception device 2) shown in Fig. 9 is compared with Fig. 1 and structure shown in Fig. 2, no It is with point, the process serial number appendix 17 for process serial number appendix 17A and process dispenser 26A being arranged front is replaced to describe With process dispenser 26.In addition, other structures and the structure described using Fig. 1 and Fig. 2 are identical or the same, in Fig. 9, with Fig. 2 It is identical, respectively omit sending device 1 constituent element a part (flow separation portion 11, CRC operation portion 12 and coding unit 13) and The diagram of a part (CRC operation portion 22 and stream combining unit 25) of the constituent element of reception device 2.

Here, the process serial number appendix 17A of this example is to the HARQ block (process) obtained in HARQ transmission processe department 14, By do not have between whole antenna sets Tx#i it is competitive in a manner of independence additional process serial number, such as it is contemplated that following (1) or (2) Shown in addition method.

(1) as shown in figure 9, it is additional according to ascending order (being also possible to descending) from antenna sets Tx#1 to antenna sets Tx#n, true After having determined the process serial number for the stream of last antenna sets Tx#n, added to ascending order since initial antenna sets Tx#1 again The method of process serial number.That is, whole antenna sets Tx#i are repeated with a series of method for adding process serial numbers.For example, for antenna The process serial number of group Tx#1 is expressed as " ... 00000 " using Bit String, and the process serial number of antenna sets Tx#n is expressed as " ... 00111 ", and the process serial number after antenna sets Tx#1 is expressed as " ... 01000 ", after antenna sets Tx#n Process serial number is expressed as " ... 01111 ".

(2) as shown in Figure 10, each antenna sets Tx#i is added according to ascending order (being also possible to descending) independent (not competing Strive) a series of process serial numbers method.For example, the process serial number " ... 00000~... 00111 " of antenna sets Tx#1, day The process serial number " ... 01000~... 01111 " of line group Tx#2, antenna sets Tx#3 process serial number " ... 10000~ ...11111”。

That is, process serial number appendix (control unit) 17A of this example in order to realize it is identical with the 1st embodiment, flowing Between do not have the additional control of competitive process serial number, also play the effect by group serial number gencration portion, a series of serial number believed Breath is according to each flow point group, for each stream, using the serial number information in corresponding group as should be attached in transmission process Process serial number (data block identification information) is supplied to HARQ transmission processe department 14.

In addition, no matter in which kind of of above-mentioned (1) and (2), in order to avoid the problem identical as the 1st embodiment, Require the addition method that process serial number is shared between sending device 1 and reception device 2.

That is, in order to identify the process serial number, in the process dispenser 26A of reception device 2, in memory (not shown) etc. In be stored in advance in process serial number used in process serial number appendix 17A and information relevant to the addition method, sending The addition method of process serial number is shared between device 1 and reception device 2.Process dispenser 26A can identify receiving process as a result, Process serial number, and according to the process serial number control Signal separator/combining unit 21 in Signal separator and synthesis handle, should Receiving process either is distributed and is inputed in each HARQ reception processing unit 22.

Hereinafter, illustrating the dynamic of the mimo transmission system of present embodiment formed as described above using Figure 11~Figure 14 together Make.

Firstly, sending the transmission that data are separated into each antenna sets Tx#i by flow separation portion 11 in sending device 1 Stream, and attached CRC code by corresponding CRC appendix 12 respectively, is then encoded portion 13 and is encoded into that Turbo code etc. is necessary to be entangled Error code, and input HARQ transmission processe department 14.

In HARQ transmission processe department 14, HARQ processing (block) is carried out to the transmission stream inputted from coding unit 13 respectively, As shown in fig. 9 or 10, add provided by process serial number appendix 17A, do not have competitive process between antenna sets Tx#i Serial number (the step S41 of Figure 12), and keep the HARQ block (process) and used in case retransmitting control, and send transmission unit 15 to.

Transmission unit 15 implements the wireless transmission that front describes to the process inputted from each HARQ transmission processe department 14 as a result, Processing, and reception device 2 is sent to from any one transmission antenna Tx#i.Figure 11 schematically illustrates the situation.The Figure 11 is suitable In the figure of Fig. 3 of the 1st embodiment, indicate that the antenna sets of transmitting and receiving are respectively n=2 and have been applicable in shown in Fig. 9 attached The case where adding method, shows to the process sent from antenna sets Tx#1 successively attached Plus "0", " 2 ", even number process as " 4 " Serial number successively adds the process sent from antenna sets Tx#2 independent (not competing with the process serial number for antenna sets Tx#1 Strive), " 1 ", " 3 ", odd number process serial number as " 5 ", and be sent to reception device 2 (referring in Fig. 9 towards below paper Solid arrow) the case where.

In addition, in the present embodiment, even if sending device 1 is as produced (referring to Fig.1 1 of transmission mode switching Symbol 500) situation use like that antenna sets quantity reduce after, it is also same as described above, maintain process serial number appendix 17A it is above-mentioned The addition method of process serial number, and carry out stream transmission.

In reception device 2, such as process " 4 " and process " 5 " are had received in situation shown in Figure 11, distributed by process Portion 26A can identify each process serial number, and distribute to correct antenna sets Rx#i.Therefore, it is cut even if producing transmission mode It changes, the conjunction between the synthesis of correct process, the i.e. process of same process serial number can be also carried out by HARQ reception processing unit 22 At.That is, the destruction (being able to solve foregoing problems 1) of the conformability of synthesis can be prevented.

Also, it is identical as the 1st embodiment in the present embodiment, according to shown in following situation 1,2 to ACK/NACK Answering method studied, thus also can solve foregoing problems 2, i.e., in sending device 1 generate process mistake retransmit make The problem of process that obtaining should retransmit cannot be retransmitted.

(situation 1) is by timing adjustment come (Figure 13) the case where receiving ack/nack signal

Reception device 2 is producing transmission mode switching (change to MIMO the diversity transmission) (symbol in 1 referring to Fig.1 500) after, as the 1st embodiment 1, the antenna identifier of (additional) each antenna sets is utilized, confirmation answer signal is carried out (ACK/NACK) reply.Here, the meaning of " utilization " and " additional " antenna identifier is identical as the 1st embodiment.

In addition, after being switched to MIMO diversity, in the 1st embodiment, it is meant that when reception device receive it is not attached When adding the process serial number of antenna identifier, the process of self-consistent antenna group is only sent.But in the 2nd embodiment, due to not having To received process serial number additional antenna identifier, so sending device 1 is only from primary antenna group when by certain section of time (T) (referring to antenna sets Tx#2 in case of fig. 11) sends process.Therefore, after time T, reception device 2 is for confirming response Reply can be omitted antenna identifier, can only using primary antenna group timing information to sending device 1 reply confirmation response Signal.

Figure 13 indicates the action flow chart of the reception device 2 in the situation 1.

As shown in Fig. 13, reception device 2 monitors and determines whether to produce transmission mode switching (to MIMO diversity transmission Change) (step S51), it is raw by ACK/NACK determination unit 24 if not generating transmission mode switching (step S51 be "No") At utilization (additional) the confirmation answer signal of antenna identifier, and reply to sending device 1.In addition, believing in the confirmation response Number be NACK signal when, by HARQ reception processing unit 22 keep receiving process, in case retransmit synthesis use (step S52).

On the other hand, when producing transmission mode switching (step S51 is "Yes"), reception device 2 is distributed using process Portion 26A carries out the separation (identification of process serial number) (step S53) of receiving process, and determines whether have passed through time T (step S54).As a result, if by time T (step S54 be "No"), phase the case where reception device 2 and above-mentioned steps S52 Together, it generates and utilizes (additional) confirmation answer signal of antenna identifier, and reply to sending device 1, and answer in the confirmation Answer signal be NACK signal when, by HARQ reception processing unit 22 keep receiving process, in case retransmit synthesis use (step S55).

In contrast, if having passed through time T (step S54 is "Yes"), reception device 2 utilizes the timing of primary antenna group Information is replied confirmation answer signal to sending device 1, and when the confirmation answer signal is NACK signal, is received by HARQ Processing unit 22 keeps receiving process, in case retransmitting synthesis uses (step S56).

In this way, in the situation 1, when producing transmission mode switching (change to MIMO diversity transmission), as long as needing Each transmission process is identified between each antenna sets Tx#i (Rx#i), just utilize (additional) each antenna identifier, Xiang Fa It send device 1 to reply confirmation answer signal, whole processes other than primary antenna group Tx#2 can be transmitted, if you do not need in each day Each transmission process is identified between line group Tx#i (Rx#i), then can only be answered using the timing information of primary antenna group to reply confirmation It answers, so can be realized the effective use of the radio resource between sending device 1 and reception device 2.

(situation 2) expressly additional process serial number come (Figure 14) the case where replying ack/nack signal

Even if reception device 2 is producing transmission mode switching (change to MIMO diversity transmission) (referring to Fig.1 in 1 Symbol 500) after, also expressly additional process serial number replys ACK/NACK.For example, being produced in Figure 11 if focused on The process " 4 " sent after transmission mode switching from the antenna sets Tx#1 (primary antenna group is Tx#2) of sending device 1, then reception device 2 generate the signal for the process serial number that attached the receiving process " 4 " as the process " 4 " using ACK/NACK determination unit 24 Response confirmation signal, reply to sending device 1.

Sending device 1 can identify which antenna the confirmation answer signal is for using control unit 16 is retransmitted as a result, The reply (being the reply for process " 4 " in this example) of which process of group Tx#i, thus will not wrong repeating transmission process " 5 ", It can correctly be retransmitted from primary antenna group Tx#2 process " 4 ".

In addition, after generating transmission mode switching, if having passed through certain time (T), sending dress in the situation 2 It sets 1 and sends process from primary antenna group, but after time T, sending device 2 cannot omit process serial number to send process. In the situation 2, after generating transmission mode switching, only sent out from primary antenna group even across certain time (T), sending device 1 It is sent into journey, it is also different from situation 1, Timing Synchronization cannot be obtained, so needing additional process serial number to reply confirmation response.

Figure 14 indicates the action flow chart of the reception device 2 in the situation 2.

That is, reception device 2 monitors and determines whether to produce transmission mode switching (change to MIMO diversity transmission) (step Rapid S61), if not generating transmission mode switching (step S61 is "No"), attached by the generation of ACK/NACK determination unit 24 The confirmation answer signal of receiving process serial number, and reply to sending device 1.In addition, being NACK signal in the confirmation answer signal When, receiving process is kept by HARQ reception processing unit 22, in case retransmitting synthesis uses (step S62).

On the other hand, when producing transmission mode switching (step S61 is "Yes"), reception device 2 is distributed using process The separation (identification of process serial number) (step S63) that portion 26A carries out receiving process all generates attached in spite of have passed through time T The confirmation answer signal of receiving process serial number is added, and has replied to sending device 1, and has been NACK letter in the confirmation answer signal Number when, by HARQ reception processing unit 22 keep receiving process, in case retransmit synthesis use (step S66).

In this way, in the situation 2, when producing transmission mode switching (change to MIMO diversity transmission), as long as needing Each transmission process is identified between each antenna sets Tx#i (Rx#i), all to confirmation answer signal additional receptive process serial number Sending device 1 is replied to, so even if not having between reception device 2 just for the confirmation answer signal of transmission process In the case that reply timing acquirement is synchronous, the process that retransmit can be also correctly identified in sending device 1, it can be reliable Ground inhibits the mistake of repeating transmission process to retransmit.

(C) explanation of the 3rd embodiment

In above-mentioned 1st and the 2nd embodiment, for the addition method of process serial number, show according in each day The mode that will not be competed between line group is added, even if being thus switched to non-MIMO multiplexing transmission from MIMO multiplexing transmission In the case of, it is also able to carry out the synthesis of correct process, prevents the mistake of process from retransmitting, and can persistently be flowed without interruption Transmission show but in the present embodiment even if process serial number is being independently appended upon transmission according to each antenna sets It can also make to spread the defeated method persistently communicated without interruption in existing PARC or precoding in stream.

In the present embodiment, focus on initially produce transmission mode switching when, due to the day other than primary antenna group Residue has process and generates the case where mistake is retransmitted in line group.Therefore, mistake is retransmitted in order to prevent, is cut from MIMO multiplexing transmission When being changed to such as MIMO diversity transmission, is measured, made according to process remaining in the antenna sets other than primary antenna group (not sent process) The constant time lag of the switching (the reduction control of stream quantity) (such as after the transmission whole of remaining process, is implemented this and is cut It changes).

Figure 15 indicates the sending device 1 when being applicable in this method and the communications status between reception device 2.Fig. 5 and Fig. 7, In Figure 11, detecting reception device 2 from MIMO multiplexing transmission region 302 (referring to Figure 26) to non-MIMO multiplexing transmission region When (MIMO diversity region) 301,303 is mobile, the switching (reference to MIMO diversity transmission is implemented at once in sending device 1 Symbol 500).

In contrast, in Figure 15, even if detecting that (region becomes for above-mentioned movement in the timing indicated using symbol 600 Change), due to there is remaining process " 2 " in antenna sets Tx#1 at the time point, so sending device 1 continues MIMO multiplexing Transmission, actually from MIMO multiplexing transmission to the switching of MIMO diversity transmission be the (example after the end of transmission of remaining process " 2 " The timing such as indicated using symbol 700).Even if as a result, unlike the 1st embodiment and the 2nd embodiment, using special Process serial number addition method, also can by simpler control, do not interrupted when generating pattern switching spread it is defeated and continue into Row communication.

But in the method, before the repeating transmission success of remaining process " 2 ", MIMO diversity cannot be switched to.Therefore, Such as shown in Figure 16, other than the switching threshold (threshold value A in relation to wireless quality) of MIMO diversity transmission, also set up even if surplus The remaining threshold value (threshold value B < A about wireless quality) for thering is process to be also switched to MIMO diversity.Also, sending device 1 is receiving dress When setting the wireless quality of (movement station) 2 between threshold value A and threshold value B, if there is remaining process, then continues MIMO multiplexing and pass It is defeated, if wireless quality is lower than threshold value B, regardless of whether there is or not remaining datas, all it is switched to MIMO diversity transmission.

It, can also be in addition, above functions can for example be mounted for a function of the repeating transmission control unit 16 that front describes It is mounted for independent control unit (transmission mode switching timing control unit).Also, such as it can use handle and surveyed by reception device 2 The reception quality informations such as fixed SIR and CQI feed back to the known method of sending device 1 etc., and sending device 1 is made to will appreciate that reception The wireless quality (same as below) of device 2.

(D) explanation of the 4th embodiment

Here, it is identical as the 3rd above-mentioned embodiment, it shows and process serial number is being independently appended upon according to each antenna sets Into the previous PARC sent in stream, persistently carry out spreading defeated other methods without interruption.

It is also identical as the 3rd embodiment in present embodiment 4, when focusing on generation transmission mode switching, due in master Residue has process and generates the case where mistake is retransmitted in antenna sets other than antenna sets.That is, from MIMO multiplexing transmission to non- When MIMO multiplexing transmission (MIMO diversity transmission) carries out pattern switching, it is greater than the threshold value of switching in the wireless quality of reception device 2 (threshold value A), but it is less than other threshold values (threshold value C) (i.e. threshold value C > threshold value A > threshold value B), and in the antenna sets other than primary antenna group In the case where not sending data (process), sending device 1 is not to wait for wireless quality and reaches threshold value A hereinafter, and at the time point It is just switched to MIMO diversity transmission later.

Figure 17 indicates above-mentioned threshold value A, the setting example of C.Also, Figure 18 indicates to be applicable in the hair in the case where the method for this example Send the communications status between device 1 and reception device 2.

Following situations is shown in FIG. 18: detecting that reception device 2 is multiplexed from MIMO multiplexing transmission region to non-MIMO After transmission region (MIMO diversity region) mobile (reference marks 600), sending device 1 receives the process for antenna sets Tx#1 The NACK signal (referring to dotted arrow 610) of " 2 ", so generating the repeating transmission of process " 2 ", is directed to having replied to sending device 1 After the ack signal (referring to solid arrow 620) of the repeating transmission process, all remaining process of horse back transmission antenna group Tx#1.At this After sample is without the time point of remaining process, if the wireless quality of reception device 2 is between threshold value A and threshold value C, send Device 1 is switched to MIMO diversity transmission in the timing indicated using symbol 700 at once.

It, can also be in addition, above functions can for example be mounted for a function of the repeating transmission control unit 16 that front describes It is mounted for independent control unit (transmission mode switching timing control unit).As long as also, above-mentioned threshold value A, threshold value B, threshold value C Meet relationship threshold C > threshold value A > threshold value B, so that it may concurrently set.

Industrial availability

Such as the above specific narration, according to the present invention, in a wireless communication system, even if in sending device and reception In the case where transport stream quantity variation (reduction) between device, it is also able to maintain that the integration for retransmitting the data block of synthetic object Property, it can normally continue to communicate, so exceedingly useful in wireless communication technology field.

Claims (1)

1. a kind of mobile terminal, wherein the mobile terminal includes:

Receiving unit receives multiple data blocks from the base station with mutiple antennas, and is connect by control channel from the base station Take in program number；And

Synthesis unit synthesizes the received data block with retransmitted data blocks according to the process serial number,

Execute be used for transmission the MIMO multiplexing transmission of multiple data flows when, the process serial number prevent the multiple data block it Between compete, and being associated between value and data flow of the process serial number based on increasing or decreasing in order,

When execution is used for transmission the MIMO diversity transmission of data flow, the process serial number prevents competing between the multiple data block It strives.