CN102056228A - Uplink hybrid automatic repeat request response information and indication bond transmission method and base station - Google Patents
Uplink hybrid automatic repeat request response information and indication bond transmission method and base station Download PDFInfo
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Abstract
The invention discloses an uplink hybrid automatic repeat request (HARQ) response information and indication bond transmission method, which comprises the following steps of: according to the dispatching information of each uplink transmission block, determining a physical hybrid-ARQ indicator channel (PHICH) resource corresponding to the uplink transmission block; and if determining that the PHICH resources corresponding to a plurality of uplink transmission blocks are the same (namely allowing the PHICH resources corresponding to a plurality of uplink transmission blocks to collide), binding a plurality of pieces of HARQ response information corresponding to the plurality of uplink transmission blocks to generate single uplink HARQ response information, and sending the generated single uplink HARQ response information in the PHICH resources. The method also comprises the step of sending physical downlink control channel (PDCCH) uplink distribution information of the uplink transmission blocks for indicating the transmission error of retransmission to solve the misconception problem which is likely to be encountered in the PHICH resource collision. By the method, the problem how to ensure that a HARQ mechanism operates normally when the PHICH resources corresponding to the plurality of uplink transmission blocks are the same is solved, and the backward compatibility with long term evolution (LTE) version 8 is ensured.
Description
Technical field
The present invention relates to the communications field, particularly relate to the LTE-Advanced system and the automatic request retransmission technology of the physical mixed in the 4G system that have adopted carrier aggregation technology and/or Uplink MIMO technology, according to the present invention, the automatic request retransmission HARQ of a kind of up mixing (HybridAutomatic Repeat reQuest) response message binding indication transmission method and base station have been proposed, wherein transmission HARQ response message single, after bundling among the automatic request retransmission indicating channel of physical mixed PHICH (Physical Hybrid ARQ IndicatorCHannel).
Background technology
As a kind of effective error-control technique, mixing automatic request retransmission HARQ technology is the focus that the communications field endeavours to study.In the HARQ mode, the sign indicating number that transmitting terminal sends not only can error detection, but also has certain error correcting capability.After the receiving terminal decoder is received code word, at first check error situation,, then carry out error correction automatically if within the error correcting capability of sign indicating number; If wrong a lot, surpassed the error correcting capability of sign indicating number, but can detect, then receiving terminal sends a decision signal by feedback channel to transmitting terminal, requires the transmitting terminal retransmission of information.In orthogonal frequency division multiplex OFDM (Orthogonal Frequency Division Multiplexing) system, by correctly reply/wrong responses ACK/KACK (Acknowledgement/Negative Acknowledgement) control signaling represents the correct or mistake of transmission, and need to judge whether to retransmit with this.
At third generation partner program 3GPP (3
RdGeneration Partnership Project) in Long Term Evolution plan LTE (the Long Term Evolution) system, the HARQ response message ACK/KACK of ascending physical signal shared channel PUSCH (Physical Uplink Shared CHannel) transmission block transmits in the PHICH of down physical channel.In the uplink of LTE system, user equipment (UE) (User Equipment) is supported a transmission block at most, and therefore corresponding PHICH channel only needs the HARQ designator HI (HARQ Indicator) of 1 bit.In LTE, when HI=1, represent correct response message (ACK), base station eNB has correctly received PUSCH; When HI=0, expression wrong responses information (NACK), the incorrect PUSCH that receives of eNB.Being mapped to corresponding PHICH resource again behind the HI process coding of this 1 bit, modulation, the spread spectrum gets on.The process that is mapped to the PHICH resource comprises UE and the eNB group number according to PHICH
Index with orthogonal sequence in the PHICH group
Determine the PHICH resource, wherein
With
The index of first Resource Block RB (Resource Block) by uplink transmission block and the cyclic shift CS (Cyclic Shift) of demodulated reference signal DMRS (DeModulation Reference Signal) value are determined.
As the evolution standard of LTE system, senior Long Term Evolution LTE-Advanced system satisfies the requirement of the uplink speed of IMT-Advanced, and uplink can be supported a plurality of member carriers, and the design of Dui Ying PHICH need be studied again therewith.The PHICH physical transfer mode in the LTE version 8 is reused in present discussion result decision, comprises design, modulation, scrambler and Resource Unit RE (Resource Element) mapping mode of orthogonal code etc.Simultaneously, PHICH will transmit on the downlink member carrier of transmission uplink assignment information (UL grant).Be equal to or greater than the uplink member carrier number and do not adopt carrier wave to indicate the scene of territory CIF (Carrier Indicator Field) for the downlink member carrier number, the PHICH resource mapping method can be reused the method for LTE version 8 as indicated above; For the scene of downlink member carrier number less than the uplink member carrier number, owing to adopted carrier wave indication territory CIF, there is the problem of " collision of PHICH resource " (PHICH collision) this moment in the mapping of PHICH resource, promptly be distributed in the cyclic shift value of the index of first Resource Block of the uplink transmission block in the different uplink member carrier and demodulated reference signal when identical as same downlink member carrier scheduling a plurality of, or because some special values of these parameters cause the group number of PHICH
Index with orthogonal sequence in the PHICH group
When identical, the pairing PHICH physical resource of these transmission blocks is identical, and the collision of PHICH resource has promptly taken place.
At the problem of this PHICH resource collision, a lot of documents have proposed solution respectively.
Ericsson thinks that this problem can solve (R1-094272 by scheduling, PHICH for Carrier Aggregation, Ericsson, 3GPP RAN1#58bis, Miyazaki, Japan, Oct.12-16,2009), promptly base station dispatcher guarantees that uplink transmission block does not adopt the cyclic shift value of the index and/or the demodulated reference signal of first identical Resource Block.The defective of this scheme is the sex-limited and scheduling complexity of its procurement division that brings.
Samsung proposes to adopt the relevant PHICH resource bias of uplink member carrier of semi-static configuration to make uplink transmission block have the index of first different Resource Block, thereby have different PHICH resource (R1-094080, PHICH Mapping in Asymmetric CarrierAggregation, Samsung, 3GPP RAN1#58bis, Miyazaki, Japan, Oct.12-16,2009).Its defective is that this solution may cause the LTE-Advanced system to need more PHICH resource than LTE version 8 systems potentially, thereby has influenced the backwards compatibility of LTE-Advanced system.
Qualcomm proposes to adopt system-level ascending resource piece to renumber and solves this problem (R1-094205, PHICH for Multicarrier Operation, Qualcomm Europe, 3GPP RAN1#58bis, Miyazaki, Japan, Oct.12-16,2009), the defective of this method is the same with the scheme that top Samsung is proposed.
Alcatel proposes to use the control channel unit CCE (Control ChannelElement) in the physical downlink control channel PDCCH (PhysicalDownlink Control CHannel) to deposit the required PHICH resource (R1-093766 more than LTE version 8 systems of LTE-Advanced system, PHICH for Multicarrier Operation, Alcatel-Lucent, Alcatel-Lucent Shanghai Bell, 3GPP RAN1#58bis, Miyazaki, Japan, Oct.12-16,2009).This method can remain on the basis that increases the PHICH resource compatibility with LTE version 8 systems, but needs more standardization effort.
It should be noted that, except can occurring the collision of PHICH resource under the carrier aggregation scene, when the LTE-Advanced system has adopted the Uplink MIMO technology, since a plurality of uplink transmission block correspondences identical time-frequency physical resource, the collision of PHICH resource also might take place, and therefore needs sometimes carrier aggregation and Uplink MIMO are considered in the lump in considering PHICH resource collision solution.
The present invention is directed to the PHICH resource collides this problem and has proposed a kind of new solution, on the basis that meets active conference decision spirit, MIMO technology to up-downgoing carrier wave asymmetry, matching method and employing realizes transparent processing, be that subscriber equipment does not need to distinguish whether be in symmetry or asymmetric carrier aggregation scene, also do not need to distinguish the Uplink MIMO technology which kind of has adopted.This solution does not need the more PHICH stock number than LTE version 8 systems, and without any the limitation of scheduling, and the standardization effort amount is less.
Summary of the invention
Technical problem to be solved by this invention proposes a kind of ascending HARQ response message binding indication transmission method and base station exactly, to solve the PHICH resource collision problem that the LTE-Advanced system is produced when adopting carrier aggregation and/or Uplink MIMO technology.
According to first scheme of the present invention, proposed the automatic request retransmission HARQ response message binding of a kind of mixing indication transmission method, comprising: the schedule information according to each uplink transmission block is determined and the automatic request retransmission indicating channel of the corresponding physical mixed of described uplink transmission block PHICH resource; And if determine that the pairing PHICH resource of a plurality of uplink transmission blocks is identical, then to bundling processing with the corresponding a plurality of HARQ response messages of described a plurality of uplink transmission blocks, producing single ascending HARQ response message, and in described PHICH resource, send the single ascending HARQ response message that is produced.
Preferably, described ascending HARQ response message binding indication transmission method can also comprise: when comprising the uplink transmission block of at least one transmission success in described a plurality of uplink transmission blocks, at the pairing subscriber equipment of each uplink transmission block of bust this in described a plurality of uplink transmission blocks, can send the physical downlink control channel PDCCH uplink assignment information that indication retransmits described uplink transmission block.
More preferably, described ascending HARQ response message binding indication transmission method can also comprise: when comprising the uplink transmission block of at least one transmission success in described a plurality of uplink transmission blocks, at the pairing subscriber equipment of each uplink transmission block of transmission success in described a plurality of uplink transmission blocks, whether send the PDCCH uplink assignment information of the new uplink transmission block of indication transmission by the base station decision.
More preferably, when the equal bust this of described a plurality of uplink transmission blocks, can not send PDCCH uplink assignment information.
Wherein, when being HARQ wrong responses NACK with the corresponding a plurality of ascending HARQ response messages of described a plurality of uplink transmission blocks, described binding is handled and is produced single HARQ NACK, otherwise described binding is handled and produced single HARQ affirmative acknowledgement ACK.
Preferably, described ascending HARQ response message binding indication transmission method can also comprise: when described a plurality of uplink transmission blocks all during transmission success, at the pairing subscriber equipment of each uplink transmission block of transmission success in described a plurality of uplink transmission blocks, whether send the physical downlink control channel PDCCH uplink assignment information of the new uplink transmission block of indication transmission by the base station decision.
More preferably, described ascending HARQ response message binding indication transmission method can also comprise: when comprising the uplink transmission block of at least one bust this in described a plurality of uplink transmission blocks, at the pairing subscriber equipment of each uplink transmission block in described a plurality of uplink transmission blocks, can send the PDCCH uplink assignment information that indication retransmits described uplink transmission block.
More preferably, when comprising the uplink transmission block of at least one bust this in described a plurality of uplink transmission blocks, can not send PDCCH uplink assignment information.
Wherein, when being HARQ and correctly replying ACK with the corresponding a plurality of ascending HARQ response messages of described a plurality of uplink transmission blocks, described binding is handled and is produced single HARQ ACK, otherwise described binding is handled and produced single HARQ wrong responses NACK.
According to alternative plan of the present invention, a kind of base station has been proposed, comprise: the resource collision detection unit, be used for determining and the automatic request retransmission indicating channel of the corresponding physical mixed of described uplink transmission block PHICH resource, and whether detect the pairing PHICH resource of a plurality of uplink transmission blocks identical according to the schedule information of each uplink transmission block; And binding processing unit, be used for when described resource collision detection unit determines that the pairing PHICH resource of a plurality of uplink transmission blocks is identical, to bundling processing with the corresponding a plurality of ascending HARQ response messages of described a plurality of uplink transmission blocks, producing single ascending HARQ response message, and in described PHICH resource, send the single ascending HARQ response message that is produced.
Preferably, described base station can also comprise: new biography/retransfer scheduling unit, be used for when described a plurality of uplink transmission blocks comprise the uplink transmission block of at least one transmission success, at the pairing subscriber equipment of each uplink transmission block of bust this in described a plurality of uplink transmission blocks, send the physical downlink control channel PDCCH uplink assignment information that indication retransmits described uplink transmission block.
More preferably, described new biography/retransfer scheduling unit further is used for when described a plurality of uplink transmission blocks comprise the uplink transmission block of at least one transmission success, at the pairing subscriber equipment of each uplink transmission block of transmission success in described a plurality of uplink transmission blocks, whether send the PDCCH uplink assignment information of the new uplink transmission block of indication transmission by the base station decision.
More preferably, described new biography/retransfer scheduling unit further is used for not sending PDCCH uplink assignment information when the equal bust this of described a plurality of uplink transmission blocks.
Wherein, when being HARQ wrong responses NACK with the corresponding a plurality of ascending HARQ response messages of described a plurality of uplink transmission blocks, described binding processing unit produces single HARQNACK, otherwise described binding processing unit produces single HARQ affirmative acknowledgement ACK.
Preferably, described base station can also comprise: new biography/retransfer scheduling unit, be used at described a plurality of uplink transmission blocks all during transmission success, at the pairing subscriber equipment of each uplink transmission block of transmission success in described a plurality of uplink transmission blocks, whether send the physical downlink control channel PDCCH uplink assignment information of the new uplink transmission block of indication transmission by the base station decision.
More preferably, described new biography/retransfer scheduling unit further is used for when described a plurality of uplink transmission blocks comprise the uplink transmission block of at least one bust this, at the pairing subscriber equipment of each uplink transmission block in described a plurality of uplink transmission blocks, send the PDCCH uplink assignment information that indication retransmits described uplink transmission block.
More preferably, described new biography/retransfer scheduling unit further is used for not sending PDCCH uplink assignment information when described a plurality of uplink transmission blocks comprise the uplink transmission block of at least one bust this.
Wherein, when being HARQ and correctly replying ACK with the corresponding a plurality of HARQ response messages of described a plurality of uplink transmission blocks, described binding processing unit produces single HARQ ACK, otherwise described binding processing unit produces single HARQ wrong responses NACK.
Description of drawings
By below in conjunction with description of drawings the preferred embodiments of the present invention, will make above-mentioned and other purpose of the present invention, feature and advantage clearer, wherein:
Fig. 1 shows the flow chart of a kind of ascending HARQ response message binding indication transmission method of the present invention;
Fig. 2 shows the uplink transmission block for the collision of PHICH resource, adopts the schematic diagram of identical PHICH resource;
The schematic diagram of the ascending HARQ response message binding indication transmission method when Fig. 3 shows uplink and relates to the MIMO technology;
Another schematic diagram of ascending HARQ response message binding indication transmission method when Fig. 4 shows uplink and relates to the MIMO technology;
Another schematic diagram of ascending HARQ response message binding indication transmission method when Fig. 5 shows uplink and relates to the MIMO technology; And
Fig. 6 shows the schematic construction block diagram according to base station of the present invention.
Embodiment
For clear detailed elaboration performing step of the present invention, provided some specific embodiments of the invention below, be applicable to wireless communication system, especially the LTE-Advanced cell mobile communication systems of supporting carrier frequency polymerization technique and/or Uplink MIMO technology.Need to prove, the invention is not restricted to these and use, but applicable to more other relevant wireless communication systems.
To a preferred embodiment of the present invention will be described in detail, having omitted in the description process is unnecessary details and function for the present invention with reference to the accompanying drawings, obscures to prevent that the understanding of the present invention from causing.
The present invention is directed to the PHICH resource collision problem that may exist in the HARQ response message transmission course among the automatic request retransmission indicating channel of the physical mixed PHICH, a kind of ascending HARQ response message binding indication transmission method has been proposed, Fig. 1 shows the flow chart of ascending HARQ response message binding indication transmission method of the present invention, as shown in Figure 1, ascending HARQ response message binding indication transmission method of the present invention can comprise the steps:
Step 101: corresponding its PHICH resource is determined according to the schedule information of uplink transmission block in the base station;
Step 102: the appearance whether collision of PHICH resource is arranged is detected in the base station;
Step 103: the pairing PHICH resource of a plurality of uplink transmission blocks is identical (collision of PHICH resource to take place if the base station detects, step 102: be), then a plurality of ascending HARQ response messages of described a plurality of uplink transmission block correspondences being handled a back ascending HARQ response message that is produced sends in this PHICH resource;
Step 104: when a described HARQ response message when correctly replying ACK, the base station is that in one or more transmission blocks of bust this in above-mentioned a plurality of uplink transmission block each sends the physical downlink control channel PDCCH uplink assignment information that indication retransmits this transmission block.
Step 110: (step 102: not), the transmission method of ascending HARQ response message among the PHICH in original LTE version 8 will be adopted in the base station if the base station detects PHICH resource collision.
Subscriber equipment can be according to the regulation of LTE version 8, according to ascending HARQ response message that receives and PDCCH uplink assignment information, determine its follow-up behavior (self adaptation retransmits the new transmission block of the transmission block of bust this, transmission block, transmission that non-self-adapting retransmits bust this or do not have operation) jointly.
Below, will specifically describe above-mentioned ascending HARQ response message binding indication transmission method.
Fig. 2 shows the uplink transmission block for the collision of PHICH resource, adopts the schematic diagram of identical PHICH resource.As shown in Figure 2, because the 3GPP meeting agrees to adopt carrier wave indication territory CIF at present, therefore the PDCCH on the downlink member carrier 0 both can be used to indicate the assignment information of place carrier wave (downlink member carrier 0) according to the PUSCH on the regular pairing uplink member carrier 0 of LTE version 8, can be used to indicate the assignment information of the PUSCH on the uplink member carrier 1 different again with uplink member carrier 0, among Fig. 2 only with two uplink member carrier, a uplink transmission block is given an example on each uplink member carrier, in fact, can also comprise plurality of application scenes, for example uplink member carrier can have a plurality of; And the uplink transmission block on each member carrier also can have a plurality of, but it is simple and clear in order to explain, following description will be carried out with reference to figure 2, those of ordinary skills can be well understood to the embodiment of the present invention in more complicated application scenarios according to the description to Fig. 2 fully.In the practical communication, uplink assignment information UL grant0 on the downlink member carrier 0 of N subframe and UL grant1 indicate the uplink member carrier 0 and the transmission of the PUSCH on the uplink member carrier 1 (PUSCH0 and PUSCH1) of N+n (n is determined by the uplink assignment information and the time relationship of corresponding PUSCH transmission) subframe respectively.In N+n+k (k is determined by the PUSCH transmission that is scheduled and the time relationship of corresponding PHICH resource) subframe, because having agreed PHICH, current 3GPP meeting will on the downlink member carrier of transmission uplink assignment information, transmit, therefore above-mentioned PUSCH0 and the pairing PHICH of PUSCH1 will be at same downlink member carriers, i.e. transmission on the downlink member carrier 0.Regulation according to LTE version 8, corresponding its PHICH resource is determined according to the schedule information of uplink transmission block in the base station, these schedule informations comprise the index of first Resource Block of this uplink transmission block and the cyclic shift value of demodulated reference signal, so when the cyclic shift value of index that above-mentioned PUSCH0 and first Resource Block of the pairing transmission block of PUSCH1 occur and demodulated reference signal is identical, the group number of the PHICH that these transmission blocks are identical with correspondence
Index with orthogonal sequence in the PHICH group
So cause the collision problem of PHICH resource.In implementation method of the present invention, allow such PHICH resource collision to occur, promptly two and above uplink transmission block can according to the rule of LTE version 8 (TS 36.213 V8.7.0, " Evolved Universal Terrestrial RadioAccess (E-UTRA); Physical layer procedures ") correspond to identical PHICH resource.Determine the PHICH resource if following follow-up LTE version adds some other parameter in addition with common, the present invention can be applied to meet the PHICH resource collision problem that is occurred in the system of follow-up LTE version in these futures equally.
In an above-mentioned PHICH resource corresponding to a plurality of uplink transmission blocks, the ascending HARQ response message of base station transmits can be the results (step 103) of the pairing a plurality of ascending HARQ response messages of above-mentioned a plurality of uplink transmission block according to method shown in the table 1-1.Note giving an example with two transmission blocks among the table 1-1, when more than two uplink transmission blocks, processing method can the rest may be inferred.
Table 1-1
| Scene | PUSCH0 replys | PUSCH1 replys | The |
| 1 | ACK | ACK | ACK |
| 2 | ACK | NACK | ACK |
| 3 | NACK | ACK | ACK |
| 4 | NACK | NACK | NACK |
From the table 1-1 as can be seen, the processing method of the ascending HARQ response message here is the method for a kind of binding (bundling), promptly the pairing a plurality of ascending HARQ response messages of a plurality of uplink transmission blocks are handled, to produce an ascending HARQ response message, unless the principle of its processing is the ascending HARQ response message of all uplink transmission blocks all is NACK, this moment, result was to produce a NACK response message, otherwise produced an ACK response message without exception.The physical treatment course that the ACK/NACK response message transmits in described PHICH resource, comprise operation such as coding, modulation, scrambling, spread spectrum and LTE version 8 (TS 36.211 V8.7.0, " EvolvedUniversal Terrestrial Radio Access (E-UTRA); Physical Channels andModulation ", TS 36.212 V8.7.0, " Evolved Universal Terrestrial RadioAccess (E-UTRA); Multiplexing and channel coding ") middle stipulate identical.
As previously mentioned, because a plurality of uplink transmission blocks are corresponding to identical PHICH resource, the ascending HARQ response message of employing table 1-1 binding processing mode will cause the subscriber equipment of the uplink transmission block that makes a mistake still might receive response message about the correct transmission of this transmission block at the identical HARQ response message of described a plurality of uplink transmission blocks transmission, cause misunderstanding.This problem will be handled by follow-up base station and solve, promptly when the ascending HARQ response message after the binding is ACK, the base station for to the ascending HARQ response message after should bundling but the uplink transmission block of bust this (being NACK promptly) to response message that should uplink transmission block send the PDCCH uplink assignment information that indication retransmits this uplink transmission block and retransmit to carry out self adaptation.The form of these PDCCH uplink assignment information can be reused Downlink Control Information DCI (Downlink Control Information) (TS 36.212 V8.7.0, " the EvolvedUniversal Terrestrial Radio Access (E-UTRA) of LTE version 8; Multiplexing and channelcoding "), its function is that the self adaptation that realizes the uplink transmission block of bust this retransmits.For the ascending HARQ response message after the binding is the situation of NACK, owing to do not have any misunderstanding this moment, will be to a plurality of uplink transmission blocks of the ascending HARQ response message after should bundling according to the regulation of LTE version 8, the employing non-self-adapting retransmits.
Above-mentioned PDCCH uplink assignment information can cause certain down control channel expense to increase, for reducing this expense, can consider to be used in combination scheduling solution (R1-094272, PHICH for Carrier Aggregation, the Ericsson that Ericsson proposes, 3GPP RAN1#58bis, Miyazaki, Japan, Oct.12-16,2009), promptly base station dispatcher guarantees that uplink transmission block does not adopt the cyclic shift value of the index and/or the demodulated reference signal of first identical Resource Block.Like this problem of PHICH resource collision can part the index of first Resource Block by distributing uplink transmission block when the base station scheduling modestly and/or the cyclic shift value of demodulated reference signal realize, when this method can not solve PHICH resource collision problem fully, method provided by the present invention can be used as useful replenishing.
In an above-mentioned PHICH resource corresponding to a plurality of uplink transmission blocks, the ascending HARQ response message of base station transmits also can be the results (step 103) of the pairing a plurality of ascending HARQ response messages of above-mentioned a plurality of uplink transmission block according to method shown in the table 1-2.Note giving an example with two transmission blocks among the table 1-2, when more than two uplink transmission blocks, processing method can the rest may be inferred.
Table 1-2
| Scene | PUSCH0 replys | PUSCH1 replys | The |
| 1 | ACK | ACK | ACK |
| 2 | ACK | NACK | NACK |
| 3 | NACK | ACK | NACK |
| 4 | NACK | NACK | NACK |
As show shown in the 1-2, the processing method of the pairing a plurality of ascending HARQ response messages of a plurality of uplink transmission blocks can also adopt another kind of binding mode to realize, unless the principle of its processing is the ascending HARQ response message of all uplink transmission blocks all is ACK, this moment, result was to produce an ACK response message, otherwise produced a NACK response message without exception.
As previously mentioned, because a plurality of uplink transmission blocks are corresponding to identical PHICH resource, the HARQ response message of employing table 1-2 binding processing mode will cause the subscriber equipment of the uplink transmission block of correct transmission still might receive response message about the erroneous transmissions of this transmission block at the identical ascending HARQ response message of described a plurality of uplink transmission blocks transmission, cause misunderstanding.This problem will be handled by follow-up base station and subscriber equipment and solve, promptly when the ascending HARQ response message after the binding is NACK, subscriber equipment is according to the regulation of LTE version 8, not only non-self-adapting ground retransmits the uplink transmission block ascending HARQ response message after should bundling, error of transmission (being NACK to response message that should uplink transmission block promptly), go back non-self-adapting ground retransmit to the ascending HARQ response message after should bundling but the correct uplink transmission block of (being ACK promptly) of transmission to response message that should uplink transmission block.Because the PHICH resource of a plurality of uplink transmission blocks after retransmitting still bumps, so still reply according to table 1-2 the base station.This process will last till always that all uplink transmission blocks all transmit correctly or reach till the maximum HARQ number of retransmissions.
Under this binding mode, the re-transmission of the uplink transmission block that above-mentioned transmission is correct can cause certain Uplink Shared Channel and down control channel expense to increase, and under the situation about after the uplink transmission block of error of transmission is retransmitting repeatedly, proving an abortion, this binding mode can cause the correct uplink transmission block of transmission also to be takeed for error of transmission by the subscriber equipment of correspondence, this binding mode results in greater loss, so can only adopt in limited scope.The uplink transmission block of noticing above-mentioned a plurality of PHICH resource collisions can belong to same subscriber equipment, also can belong to some subscriber equipmenies respectively, therefore, when the PHICH of above-mentioned a plurality of transmission block correspondences resource was identical, one or more subscriber equipmenies were mapped to same ACK/NACK response message on the identical PHICH resource with employing.Subscriber equipment will detect and receive the PDCCH that sends to it at control channel, comprising uplink assignment information.In ascending HARQ response message binding indication transmission method of the present invention, subscriber equipment will by ascending HARQ response message and detected PDCCH uplink assignment information determine jointly its follow-up subscriber equipment behavior (TS 36.300 V8.9.0, " Evolved Universal Terrestrial RadioAccess (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 "), as shown in table 2.
Table 2
As shown in table 2, in the present invention, the behavior of subscriber equipment is divided into following several:
1. if the HARQ response message received of subscriber equipment is ACK or NACK, the PDCCH uplink assignment information of receiving is new transmission, the uplink transmission block that will send before then subscriber equipment will be thought is successfully received by the base station, so will indicate according to PDCCH, transmits new data;
2. if the HARQ response message received of subscriber equipment is ACK, but do not receive PDCCH uplink assignment information simultaneously, then the uplink transmission block that send before can't judging of subscriber equipment does not have and is successfully received by the base station, so can only keep the data in the HARQ buffer memory, wait subsequent P DCCH;
3. if the HARQ response message received of subscriber equipment is ACK or NACK, the PDCCH uplink assignment information of receiving is attached most importance to and is caught the inferior data that sent, the uplink transmission block that will send before then subscriber equipment will be thought is not successfully received by the base station, to indicate according to PDCCH, self adaptation retransmits the data that sent last time;
4. if the HARQ response message received of subscriber equipment is NACK, but do not receive PDCCH uplink assignment information simultaneously, the uplink transmission block that will send before then subscriber equipment will be thought is not successfully received by the base station, so will retransmit mode according to the up non-self-adapting of regulation in the LTE version 8, retransmit the data that sent last time.
Should be noted that, subscriber equipment can be in same descending sub frame, also can receive above-mentioned ascending HARQ response message and PDCCH uplink assignment information in different descending sub frames, its temporal validity can be judged according to the pertinent regulations of LTE version 8, when promptly receiving NACK, PDCCH sends to subscriber equipment before need arriving in the cycle that the subscriber equipment non-self-adapting retransmits, and when receiving ACK, the transmitting time of PDCCH is regulation not.
Ascending HARQ response message binding indication transmission method described above goes for subscriber equipment equally and adopts the Uplink MIMO technology, the situation of the corresponding identical time-frequency physical resource of up in other words two or more transmission block, this moment, a plurality of uplink transmission blocks separated by the spatial domain signal processing.Here the Uplink MIMO technology comprises uplink single user MIMO (Single User MIMO) and multiuser MIMO (Multiple User MIMO).In the system that has adopted the Uplink MIMO technology, the problem that the PHICH resource of a plurality of uplink transmission block correspondences still might bump, the reason that this moment, the PHICH resource bumped are because a plurality of transmission blocks are mapped on the identical time-frequency physical resource and cause.Certainly, when adopting carrier aggregation and Uplink MIMO technology in the system simultaneously, the scene of PHICH resource collision will be more frequent, and the present invention can be applied to adopt simultaneously the system of carrier aggregation and Uplink MIMO technology equally.
To how apply the present invention to these scenes by several instance interpretation below.
The schematic diagram of the ascending HARQ response message binding indication transmission method when Fig. 3 shows uplink and relates to the MIMO technology.As shown in Figure 3, with two users is example, one of them user is MIMO user, have uplink transmission block 1 and uplink transmission block 2 (uplink transmission block with two identical running time-frequency resources on the uplink member carrier is an example), two PHICH resources (PHICH resource 1 and PHICH resource 2) that difference is corresponding, other has a user is non-MIMO user, the collision of PHICH resource so take place in PHICH resource 2 that its uplink transmission block 3 (is example with a uplink transmission block on the uplink member carrier) is also corresponding between two uplink transmission blocks of two users (uplink transmission block 2 and uplink transmission block 3).The transmission of the HARQ response message of two uplink transmission block correspondences that bump and the behavior of subsequent base stations and subscriber equipment will realize according to the binding indication transmission method of ascending HARQ response message among the aforesaid PHICH of the present invention.
Another schematic diagram of ascending HARQ response message binding indication transmission method when Fig. 4 shows uplink and relates to the MIMO technology.
Fig. 4 is that MIMO user's two uplink transmission blocks and non-MIMO user's a uplink transmission block all adopt identical PHICH resource with the difference of Fig. 3.The transmission of the ascending HARQ response message of three uplink transmission block correspondences that bump at this moment, and the behavior of subsequent base stations and subscriber equipment will realize according to the binding indication transmission method of ascending HARQ response message among the aforesaid PHICH of the present invention.
Another schematic diagram of HARQ response message binding indication transmission method when Fig. 5 shows uplink and relates to the MIMO technology.
The difference of Fig. 5 and Fig. 3 is that two users are MIMO user, respectively corresponding uplink transmission block 1, uplink transmission block 2 and uplink transmission block 3, uplink transmission block 4 (is example with two identical time-frequency uplink transmission blocks on the corresponding uplink member carrier of each user).If MIMO user 1 uplink transmission block 2 collides with the PHICH resource of MIMO user 2 uplink transmission block 3, the transmission of the HARQ response message of two uplink transmission block correspondences that then bump and the behavior of subsequent base stations and subscriber equipment will realize according to the binding indication transmission method of ascending HARQ response message among the aforesaid PHICH of the present invention.
Should be noted in the discussion above that the above part scene of only having enumerated, to those skilled in the art, on the abundant disclosed basis of the present invention, other similar scenes all are to imagine easily.
A kind of mobile communication system of the embodiment of the invention can comprise subscriber equipment and base station, and can adopt carrier aggregation technology and/or Uplink MIMO technology.
Subscriber equipment is when carrying out uplink, when occurring adopting the pairing PHICH resource of a plurality of uplink transmission blocks of MIMO technology identical, or a plurality of pairing PHICH resources of uplink transmission block that are distributed on the different uplink member carrier are identical, or when adopting in a plurality of uplink transmission blocks of MIMO technology several identical with the pairing PHICH resource of several uplink transmission blocks on other uplink member carrier, or the pairing PHICH resource of one or more uplink transmission blocks of one or more uplink transmission blocks of this subscriber equipment and another or a plurality of subscriber equipmenies is when identical, described one or more subscriber equipment is mapped to same ascending HARQ response message on the identical PHICH resource as the HARQ response message of its described uplink transmission block with employing, and determines the follow-up behavior of described subscriber equipment according to the mode in the table 2 according to this HARQ response message received and PDCCH uplink assignment information.
During the ascending HARQ response message of the described a plurality of uplink transmission blocks that adopted identical PHICH resource of base station feedback, can adopt as the mode among the table 1-1 and bundle ascending HARQ response message of ascending HARQ response message generation of handling a plurality of uplink transmission blocks, in described PHICH resource, send; When a described ascending HARQ response message was ACK, at the uplink transmission block of bust this in fact, the PDCCH uplink assignment information of transmission retransmitted with the self adaptation that realizes this uplink transmission block.
On the other hand, during the ascending HARQ response message of the described a plurality of uplink transmission blocks that adopted identical PHICH resource of base station feedback, also can adopt as the mode among the table 1-2 and bundle ascending HARQ response message of ascending HARQ response message generation of handling a plurality of uplink transmission blocks, in described PHICH resource, send; When a described ascending HARQ response message is NACK, not only non-self-adapting ground retransmits the uplink transmission block ascending HARQ response message after should bundling, error of transmission (being NACK to response message that should uplink transmission block promptly), also non-self-adapting ground retransmit to the ascending HARQ response message after should bundling but the uplink transmission block of transmission correct (being ACK promptly) to response message that should uplink transmission block, till all uplink transmission blocks all successfully transmit or arrive maximum HARQ number of retransmissions.
For realizing above-mentioned ascending HARQ response message binding indication transmission method, the present invention also provides a kind of base station, and Fig. 6 shows the schematic construction block diagram according to base station of the present invention.As shown in Figure 6, described base station comprises: resource collision detection unit 601, binding processing unit 602 and new biography/retransfer scheduling unit 603.
Whether resource collision detection unit 601 is used to detect the pairing PHICH resource of uplink transmission block and bumps, and the uplink block message that collision is related to (the HARQ response message etc. that for example, can comprise PHICH resource, each uplink transmission block) sends binding processing unit 602 to.
The HARQ response message that binding processing unit 602 is used for taking place the uplink transmission block of PHICH collision carries out according to the mode of table 1-1 that cluster is handled and feedback.New biography/retransfer scheduling unit 603 is used for when described a plurality of uplink transmission blocks comprise the uplink transmission block of at least one transmission success, at the pairing subscriber equipment of each uplink transmission block of bust this in described a plurality of uplink transmission blocks, send the PDCCH uplink assignment information that indication retransmits described uplink transmission block; And,, can send the PDCCH uplink assignment information of the new uplink transmission block of indication transmission if this subscriber equipment has data to be sent at the pairing subscriber equipment of each uplink transmission block of transmission success in described a plurality of uplink transmission blocks.When the equal bust this of described a plurality of uplink transmission blocks, then new biography/retransfer scheduling unit 603 does not send PDCCH uplink assignment information.
Binding processing unit 602 also can carry out cluster processing and feedback according to the mode of table 1-2 with the HARQ response message that the uplink transmission block of PHICH collision takes place.At this moment, new biography/retransfer scheduling unit 603 can be at described a plurality of uplink transmission blocks all during transmission success, the pairing subscriber equipment of each uplink transmission block at transmission success in described a plurality of uplink transmission blocks, if this subscriber equipment has data to be sent, can send the PDCCH uplink assignment information of the new uplink transmission block of indication transmission; And when in described a plurality of uplink transmission blocks, comprising the uplink transmission block of at least one bust this, at the pairing subscriber equipment of each uplink transmission block in described a plurality of uplink transmission blocks, send the PDCCH uplink assignment information that indication retransmits described uplink transmission block, perhaps PDCCH uplink assignment information not.
Thus, subscriber equipment can realize in follow-up operation that the self adaptation of this uplink transmission block retransmits.
In above description, at each step, enumerated a plurality of examples, though the inventor indicates example associated with each other as much as possible, this does not also mean that must there be corresponding relation in these examples according to corresponding label.As long as selected example do not have contradiction between given condition, can in different steps, select the not corresponding example of label to constitute the corresponding techniques scheme, such technical scheme also should be considered as within the scope of the invention involved.
Should be noted in the discussion above that in above description,, show technical scheme of the present invention, but be not intended that the invention be limited to above-mentioned steps and cellular construction only in the mode of example.Under possible situation, can adjust and accept or reject step and cellular construction as required.Therefore, some step and unit are not to implement the necessary element of overall invention thought of the present invention.Therefore, technical characterictic essential to the invention only is subject to the minimum requirements that can realize overall invention thought of the present invention, and is not subjected to the restriction of above instantiation.
So far invention has been described in conjunction with the preferred embodiments.Should be appreciated that those skilled in the art can carry out various other change, replacement and interpolations under the situation that does not break away from the spirit and scope of the present invention.Therefore, scope of the present invention is not limited to above-mentioned specific embodiment, and should be limited by claims.
Claims (18)
1. the automatic request retransmission HARQ response message of up mixing bundlees indication transmission method, comprising:
Schedule information according to each uplink transmission block is determined and the automatic request retransmission indicating channel of the corresponding physical mixed of described uplink transmission block PHICH resource; And
If determine that the pairing PHICH resource of a plurality of uplink transmission blocks is identical, then to bundling processing with the corresponding a plurality of HARQ response messages of described a plurality of uplink transmission blocks, producing single ascending HARQ response message, and in described PHICH resource, send the single ascending HARQ response message that is produced.
2. ascending HARQ response message binding indication transmission method according to claim 1 also comprises:
When comprising the uplink transmission block of at least one transmission success in described a plurality of uplink transmission blocks, at the pairing subscriber equipment of each uplink transmission block of bust this in described a plurality of uplink transmission blocks, send the physical downlink control channel PDCCH uplink assignment information that indication retransmits described uplink transmission block.
3. ascending HARQ response message binding indication transmission method according to claim 2 also comprises:
When comprising the uplink transmission block of at least one transmission success in described a plurality of uplink transmission blocks, at the pairing subscriber equipment of each uplink transmission block of transmission success in described a plurality of uplink transmission blocks, whether send the PDCCH uplink assignment information of the new uplink transmission block of indication transmission by the base station decision.
4. according to claim 2 or 3 described ascending HARQ response message binding indication transmission methods, it is characterized in that:
When the equal bust this of described a plurality of uplink transmission blocks, do not send PDCCH uplink assignment information.
5. according to the described ascending HARQ response message binding of one of claim 1～4 indication transmission method, it is characterized in that:
When being HARQ wrong responses NACK with the corresponding a plurality of ascending HARQ response messages of described a plurality of uplink transmission blocks, described binding is handled and is produced single HARQ NACK, otherwise described binding is handled and produced single HARQ affirmative acknowledgement ACK.
6. ascending HARQ response message binding indication transmission method according to claim 1 also comprises:
When described a plurality of uplink transmission blocks all during transmission success, at the pairing subscriber equipment of each uplink transmission block of transmission success in described a plurality of uplink transmission blocks, whether send the physical downlink control channel PDCCH uplink assignment information of the new uplink transmission block of indication transmission by the base station decision.
7. ascending HARQ response message binding indication transmission method according to claim 6 also comprises:
When comprising the uplink transmission block of at least one bust this in described a plurality of uplink transmission blocks, at the pairing subscriber equipment of each uplink transmission block in described a plurality of uplink transmission blocks, send the PDCCH uplink assignment information that indication retransmits described uplink transmission block.
8. according to claim 6 or 7 described ascending HARQ response message binding indication transmission methods, it is characterized in that:
When comprising the uplink transmission block of at least one bust this in described a plurality of uplink transmission blocks, do not send PDCCH uplink assignment information.
9. according to the described ascending HARQ response message binding in one of claim 1 and 6～8 indication transmission method, it is characterized in that:
When being HARQ and correctly replying ACK with the corresponding a plurality of ascending HARQ response messages of described a plurality of uplink transmission blocks, described binding is handled and is produced single HARQ ACK, otherwise described binding is handled and produced single HARQ wrong responses NACK.
10. base station comprises:
The resource collision detection unit, be used for determining and the automatic request retransmission indicating channel of the corresponding physical mixed of described uplink transmission block PHICH resource, and whether detect the pairing PHICH resource of a plurality of uplink transmission blocks identical according to the schedule information of each uplink transmission block; And
The binding processing unit, be used for when described resource collision detection unit determines that the pairing PHICH resource of a plurality of uplink transmission blocks is identical, to bundling processing with the corresponding a plurality of ascending HARQ response messages of described a plurality of uplink transmission blocks, producing single ascending HARQ response message, and in described PHICH resource, send the single ascending HARQ response message that is produced.
11. base station according to claim 10 also comprises:
New biography/retransfer scheduling unit, be used for when described a plurality of uplink transmission blocks comprise the uplink transmission block of at least one transmission success, at the pairing subscriber equipment of each uplink transmission block of bust this in described a plurality of uplink transmission blocks, send the physical downlink control channel PDCCH uplink assignment information that indication retransmits described uplink transmission block.
12. base station according to claim 11 is characterized in that:
Described new biography/retransfer scheduling unit also is used for when described a plurality of uplink transmission blocks comprise the uplink transmission block of at least one transmission success, at the pairing subscriber equipment of each uplink transmission block of transmission success in described a plurality of uplink transmission blocks, whether send the PDCCH uplink assignment information of the new uplink transmission block of indication transmission by the base station decision.
13., it is characterized in that according to claim 11 or 12 described base stations:
Described new biography/retransfer scheduling unit also is used for not sending PDCCH uplink assignment information when the equal bust this of described a plurality of uplink transmission blocks.
14., it is characterized in that according to the described base station of one of claim 10～13:
When being HARQ wrong responses NACK with the corresponding a plurality of ascending HARQ response messages of described a plurality of uplink transmission blocks, described binding processing unit produces single HARQ NACK, otherwise described binding processing unit produces single HARQ affirmative acknowledgement ACK.
15. base station according to claim 10 also comprises:
New biography/retransfer scheduling unit, be used at described a plurality of uplink transmission blocks all during transmission success, at the pairing subscriber equipment of each uplink transmission block of transmission success in described a plurality of uplink transmission blocks, whether send the physical downlink control channel PDCCH uplink assignment information of the new uplink transmission block of indication transmission by the base station decision.
16. base station according to claim 15 is characterized in that:
Described new biography/retransfer scheduling unit also is used for when described a plurality of uplink transmission blocks comprise the uplink transmission block of at least one bust this, at the pairing subscriber equipment of each uplink transmission block in described a plurality of uplink transmission blocks, send the PDCCH uplink assignment information that indication retransmits described uplink transmission block.
17., it is characterized in that according to claim 15 or 16 described base stations:
Described new biography/retransfer scheduling unit also is used for when described a plurality of uplink transmission blocks comprise the uplink transmission block of at least one bust this, does not send down control channel PDCCH uplink assignment information.
18., it is characterized in that according to the described base station in one of claim 10 and 15～17:
When being HARQ and correctly replying ACK with the corresponding a plurality of HARQ response messages of described a plurality of uplink transmission blocks, described binding processing unit produces single HARQ ACK, otherwise described binding processing unit produces single HARQ wrong responses NACK.
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