CN102447549B - Uplink synchronous hybrid automatic retransmission query method for mobile communication system - Google Patents
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Abstract
The invention provides an uplink synchronous hybrid automatic retransmission query method for a mobile communication system, which comprises the steps that: A, a base station judges whether resource conflict is generated during the uplink processes of a plurality of customer equipment according to a scheduling algorithm strategy, and under the condition of being incapable of distributing the channel resource for costumers with lower business priorities, the invalid uplink authorization is generated, and is sent to the costumer equipment with lower business priorities through the downlink control information; and B, the costumer equipment with lower business priorities receives the downlink control information, the received invalid uplink authorization is determined according to the downlink control information, the retransmission of the uplink hybrid automatic retransmission query process on a preset position is eliminated according to the invalid uplink authorization, and the transmitted times are kept unchanged. After adopting the method disclosed by the invention, the available transmitted times of the hybrid automatic retransmission query (HARQ) process can be prevented from being reduced when the resource conflict is solved, so the residual HARQ error occurrence probability is reduced.
Description
Technical field
The present invention relates to the communication technology, particularly a kind of method of uplink synchronous hybrid automatic retransmission query in mobile communication system.
Background technology
Long Term Evolution (Long Term Evolution, LTE) transmitting uplink data of system adopts synchronized mixes automatic repeat request (Hybrid Automatic Repeat Request, HARQ) technology, and support self adaptation and non-self-adapting two kinds of retransmission scheme.
Fig. 1 is the method flow diagram of a kind of typical uplink synchronous hybrid automatic retransmission query of existing LTE system.Existing composition graphs 1, is described the method for this kind of typical uplink synchronous hybrid automatic retransmission query of existing LTE system, specific as follows:
Step 101, carry out Resourse Distribute (Resource Assignment), medium access control (the Media Access Control of eNB side, MAC) layer sends the HARQ entity of resource allocation information to eNB side, and this resource allocation information comprises the configuration informations such as modulation scheme, ascending resource and MCS; Step 102, carries out Resourse Distribute (Resource Assignment), and HARQ information is added into physics (PHY) layer that resource allocation information transfers to eNB side by the HARQ entity of eNB side; Step 103, send Downlink Control Information (Downlink Control Information, the PHY layer of form (format) 0, eNB side DCI) sends uplink authorization (ULgrant) and the HARQ information PHY layer to UE side by the DCI format 0 being used to indicate Physical Uplink Shared Channel (PUSCH) and dispatching; Step 104, sends Physical Downlink Control Channel (PDCCH) information (Info), and the PHY layer of UE side sends PDCCH information to UE side HARQ entity, and this control information comprises uplink authorization and HARQ information; Step 105, obtains upstream data instruction (ULdata ind); Step 106, obtains upstream data (UL data); Step 105 is to step 106, and UE side HARQ entity obtains upstream data by UE side MAC layer; Step 107, carries out HARQ operation (operation), and the HARQ process (Process) that UE side HARQ entity is corresponding according to configuration instruction UE sides such as the uplink authorization obtained, HARQ information and MCS carries out HARQ operation; Step 108, sends UL data, and UE side HARQ process sends upstream data to UE side PHY layer according to the instruction of HARQ entity; Step 109, uploads UL data, and UE side physical layer sends UL data to eNB side physical layer; Step 110 to step 114 be the PHY layer of eNB side, HARQ process, HARQ entity by transmitting uplink data to the method for eNB side MAC layer; Step 115 to step 119 is that eNB is according to whether correctly receiving receipt to UE side physical layer feedback HARQ feedback information (Feedback), this HARQ feedback information is for confirming (Acknowledged, ACK) information or (Non-acknowledged, NACK) unconfirmed information; Step 120, send HARQ feedback information, HARQ feedback information is sent to UE side HARQ entity by UE side PHY layer; Step 121, carries out data processing (Data process), the HARQ process that HARQ feedback information sends to UE side corresponding by UE side HARQ entity; UE side HARQ process retransmits upstream data according to the HARQ feedback information received according to the method for step 108 to step 109 or transmits new data.
Due to the up employing synchronous HARQ of LTE, therefore the transmission time-domain position of each HARQ in UE side process is predefined, that is first time transmission and re-transmission are carried out in same process, there are fixed time interval re-transmission MACPDU and first time between transmitting, and do not need to indicate corresponding HARQ process ID significantly during re-transmission.On each predefine time-domain position, as long as the buffer memory of HARQ process is not empty, or the uplink authorization in Shang You base station, this position, HARQ entity all can indicate corresponding HARQ process transmission new data, adaptive retransmission or non-self-adapting to retransmit.Adaptive retransmission refer to retransmit the configuration information such as resource, MCS that MAC PDU applies with transmit the corresponding configuration used for the first time can be different, need clear and definite dispatch to notify; But not adaptive retransmission refers to and retransmits MAC PDU and to transmit the resource, the MCS that use for the first time all identical, clear and definite dispatch is not used to notify.
Fig. 2 is the method flow diagram that existing UE side HARQ entity carries out HAQR operation.Existing composition graphs 2, the method for existing UE side HARQ entity being carried out to HARQ operation is described:
Step 201: determine the HARQ process corresponding with subframe, in this step, HARQ entity determines the HARQ process corresponding with this subframe according to subframe timing, does not repeat them here concrete defining method; Step 202, judge whether that uplink authorization is instructed to described subframe, if, perform step 203, otherwise perform step 204, in this step, HARQ entity has judged whether that uplink authorization is instructed to described subframe, namely judge whether that uplink authorization is instructed to HARQ process corresponding to described subframe, if so, perform step 203, otherwise perform step 204; Step 203, type according to authorizing indicates this process to carry out new data transmission or Adaptive Transmission, perform step 206 afterwards, the HARQ process that in this step, HARQ entity indicates described subframe corresponding according to the type of uplink authorization carries out new data transmission or Adaptive Transmission; Step 204, judges whether the buffer memory of this process is empty, if so, performs step 206, otherwise perform step 205, in this step, HARQ entity judges whether the buffer memory of the HARQ process that described subframe is corresponding is empty; Step 205, indicates this process to carry out non-self-adapting re-transmission, and the HARQ process that in this step, HARQ entity indicates described subframe corresponding carries out non-self-adapting re-transmission; Step 206, terminates.
Fig. 3 is the method flow diagram that existing UE side HARQ process sends upstream data.Existing composition graphs 3, the method existing UE side HARQ process being sent to upstream data is described, specific as follows:
Step 301, judges whether to receive HARQ feedback, and if so, perform step 302, otherwise perform step 303, in this step, HARQ process judges whether to receive the HARQ feedback information from eNB; Step 302, is set to the value received by HARQ feedback information; Step 303, judges whether the instruction receiving HARQ entity, if so, performs step 304, otherwise performs step 313; Step 304, judges that HARQ entity indicates whether as new data transmission, if so, performs step 305, otherwise performs step 306; Step 305, is set to 0 by the number of transmissions and transmits new data, performs step 311 afterwards; Step 306, judges that HARQ entity indicates whether as adaptive retransmission, if so, performs step 307, otherwise performs step 308; Step 307, adds 1 by the number of transmissions and performs adaptive retransmission, performing step 311 afterwards; Step 308, judges whether HARQ feedback information is NACK, if so, performs step 309, otherwise performs step 310; Step 309, adds 1 by the number of transmissions and performs non-self-adapting re-transmission, performing step 311 afterwards; Step 310, the number of transmissions adds 1 and does not perform re-transmission, performs step 311 afterwards; Step 311, judges whether to reach maximum transmission times, if so, performs step 312, otherwise performs step 313; Step 312, empties the data of HARQ process cache, performs step 313 afterwards; Step 313, terminates.
In LET system uplink scheduling process, when under up heavy duty scene, certain ascending HARQ course of a UE is by dynamic dispatching, certain ascending HARQ course of another UE is by semi-persistent scheduling, when the predefine time-domain position of these two processes is identical and the process of dynamic dispatching occupies the retransmission resource of the process of semi-persistent scheduling, the non-self-adapting of the process of dynamic dispatching retransmit may with the new data of the process of semi-persistent scheduling or retransmission collisions.When the situation of this resource contention occurs, may there is not other resources due to heavier loads and carry out adaptive retransmission for the process of dynamic dispatching, thus need base station to forbid the re-transmission of HARQ process on predefine time-domain position of this dynamic dispatching.According to Fig. 1, the method of Fig. 2 and Fig. 3 is known, eNB is to forbid the transmission of HARQ process on predefine position of UE, feedback content is in advance needed to be the HARQ process of HARQ feedback information to UE side of ACK, but when although HARQ process does not retransmit according to the HARQ feedback information that content is ACK, corresponding retransmission opportunity reduces once (step 310 as Fig. 3), although that is HARQ process abandons transmission on the predefine time-domain position of section sometime, but the number of transmissions on these predefine time-domain positions still can be counted into the number of transmissions, which results in the minimizing of the actual available transmission number of times of described HARQ process.And according to existing ascending HARQ transmission mechanism, when HARQ maximum transmission times one timing, an actual the number of transmissions that can use of HARQ process is fewer, the probability that residue HARQ error occurs is larger.
Also exist in the method for the uplink synchronous hybrid automatic retransmission query of existing LTE-A (LTE-Advanced) system uplink synchronous hybrid automatic retransmission query shown in Fig. 1 problem, in other words, all can cause the minimizing of the actual available transmission number of times of HARQ process in the method for the uplink synchronous hybrid automatic retransmission query of existing LTE system and lte-a system when solving resource contention, residue HARQ error probability of happening increases.
Summary of the invention
In view of this, goal of the invention of the present invention is the method providing uplink synchronous hybrid automatic retransmission query in a kind of mobile communication system, the method can avoid the minimizing of HARQ process available transmission number of times when solving resource contention, reduce residue HARQ error probability of happening.
For achieving the above object, technical scheme of the present invention is specifically achieved in that
A method for uplink synchronous hybrid automatic retransmission query in mobile communication system, the method comprises:
A, base station judge the up process generation resource contention of multiple subscriber equipment during according to dispatching algorithm strategy, when being the lower user equipment allocation channel resource of service priority, generate invalid uplink authorization, and send invalid uplink authorization to the lower subscriber equipment of described service priority by Downlink Control Information;
The subscriber equipment that B, described service priority are lower receives Downlink Control Information, determine to receive invalid uplink authorization according to Downlink Control Information, the re-transmission of up hybrid automatic repeat request processes on predefine position is cancelled according to invalid uplink authorization, the number of transmissions remains unchanged, and the actual available transmission number of times of described up hybrid automatic repeat request processes does not reduce.
In said method, the method that base station described in steps A generates invalid uplink authorization is: the resource block assignments in the form DCI format 0 of Downlink Control Information and frequency-hopping resource allocation domain are arranged to by base station can not the resource indicated value of corresponding efficient resource.
In said method, base station described in steps A sends invalid uplink authorization by Downlink Control Information and to the method for the lower subscriber equipment of described service priority is: base station send resource block assignments and frequency-hopping resource allocation domain be configured to can not the DCI format 0 of resource indicated value of corresponding efficient resource to the lower subscriber equipment of described service priority.
In said method, determine that the method receiving invalid uplink authorization is according to Downlink Control Information described in step B: the up mixed automatic repeat request HARQ entity that the subscriber equipment that described service priority is lower comprises is according to the Downlink Control Information received, determine resource indicated value in the form DCI format 0 of Downlink Control Information corresponding be invalid resource, then determine to receive invalid uplink authorization.
In said method, the method cancelling the re-transmission of up hybrid automatic repeat request processes on predefine position according to invalid uplink authorization described in step B is: described HARQ entity defines invalid uplink authorization and is indicated to subframe, then HARQ operation is not carried out to described subframe, do not send the instruction HARQ process that extremely described subframe is corresponding.
Above-mentioned technical scheme is visible, in mobile communication system provided by the invention uplink synchronous hybrid automatic retransmission query method in, after base station detects when the up course allocation channel resource to multiple UE and there is resource contention, can select no longer to send ACK information to the lower UE of service priority, but send an invalid uplink authorization to the lower UE of service priority, the UE making service priority lower no longer indicates the HARQ process corresponding with this UE to carry out any operation, not only eliminate ascending HARQ course data retransmission on predefined time-domain position, and the number of transmissions cancelled also can not count the number of transmissions, avoid the problem that the residue HARQ error probability of happening that causes because the number of transmissions cancelled still counts the number of transmissions in existing method increases.
Accompanying drawing explanation
Fig. 1 is the method flow diagram of a kind of typical uplink synchronous hybrid automatic retransmission query of existing LTE system.
Fig. 2 is the method flow diagram that existing UE side HARQ entity carries out HAQR operation.
Fig. 3 is the method flow diagram that existing UE side HARQ process sends upstream data.
Fig. 4 is the method flow diagram of uplink synchronous hybrid automatic retransmission query in mobile communication system of the present invention.
Embodiment
For making object of the present invention, technical scheme and advantage clearly understand, to develop simultaneously embodiment referring to accompanying drawing, the present invention is described in more detail.
In order to solve in prior art due to problem that the actual available transmission number of times of the HARQ process that causes in resource contention solution process reduces, the invention provides the method for uplink synchronous hybrid automatic retransmission query in a kind of mobile communication system, after eNB in the method judges that according to dispatching algorithm strategy the resource of the up process use of multiple UE there occurs resource contention, when other channel resources cannot be distributed for the UE that service priority is lower, eNB is when cancelling the re-transmission of ascending HARQ course on predefined time-domain position, not feedback content can be selected to be that the HARQ feedback information of ACK is to the lower UE of service priority, but send a Lame delegation to the lower UE of described service priority, the HARQ entity receiving the UE side of Lame delegation removes the uplink authorization information of described HARQ process, no longer send instruction HARQ process transmission new data, the instruction that adaptive retransmission or non-self-adapting retransmit is to described HARQ process, HARQ process keeps the number of transmissions constant, thus avoid described HARQ process not data retransmission and problem that HARQ error probability of happening that the number of transmissions increase causes increases.
Fig. 4 is the method flow diagram of uplink synchronous hybrid automatic retransmission query in mobile communication system of the present invention.As shown in Figure 4, in mobile communication system of the present invention, the method for uplink synchronous hybrid automatic retransmission query can be applicable in LTE system or lte-a system, compared with the method for uplink synchronous hybrid automatic retransmission query in LTE system existing shown in Fig. 1, the step 401 of method of the present invention is obviously different to step 107 from the step 101 in existing method to step 407, other steps are identical, only different steps is described at this, specific as follows:
The MAC layer of step 401:eNB side sends resource contention information to the HARQ entity of eNB side;
ENB is when the up course allocation channel resource for multiple UE, judge whether the resource that the up process of multiple UE uses clashes by existing dispatching algorithm strategy, if, then according to the height of service priority, for other the channel resource of up course allocation of the lower UE of service priority, if now without suitable channel resource allocation to the up process of UE, then send resource contention information to the HARQ entity of eNB side by the MAC layer of eNB side; Otherwise, be the up course allocation channel resource of multiple UE according to the method for step 101.
Above-mentioned resource contention information is sent by existing resource allocation information.
Resource contention information is the information of the up process of the UE clashed.
The HARQ entity of step 402:eNB side sends resource contention information to the PHY layer of eNB side;
Resource contention information is sent to the PHY layer of eNB side by the HARQ entity of eNB side, specifically sends above-mentioned resource contention information by existing resource allocation information.
The PHY layer of step 403:eNB side generates invalid uplink authorization according to the resource contention information received, and is sent invalid up to the PHY layer of UE side by DCI format 0;
Resource block assignments in DCI format 0 in the present invention and frequency-hopping resource allocation domain comprise altogether
individual bit, the resource Physical Resource Block for uplink assignment in existing LTE system is continuous print, and the number of the starting resource block position and continuous resource block of distributing to the resource of a UE can be passed through
the number value that individual bit represents obtains, and this numerical value is called as resource indicated value (Resource Indication Value, RIV).Under all band width configuration in existing LTE system, not
all RIV that individual bit can represent can both corresponding one section of effective resource, and those can not the RIV of corresponding efficient resource not be used to do normal Resourse Distribute.
The PHY layer of eNB side is according to the resource contention information received, resource block assignments in DCI format 0 and frequency-hopping resource allocation domain being arranged to can not resource indicated value (the Resource Indication Value of corresponding efficient resource, RIV), the PHY layer of invalid uplink authorization to UE side is sent by DCI format 0.Such as: eNB can adopt by
the resource block assignments of individual bit and frequency-hopping resource allocation domain are set to " 1 " entirely, and because this value can not corresponding effective resource location, UE receives
the uplink authorization information that individual bit is set to " 1 " entirely can judge that this uplink authorization is invalid uplink authorization.
The PHY layer of step 404:UE side sends invalid uplink authorization to the HARQ entity of UE side;
The invalid uplink authorization information (Info) transmitted by existing Physical Downlink Control Channel (PDCCH) received is sent to the HARQ entity of UE side by the PHY layer of UE side.
The HARQ entity of step 405:UE side judges whether to receive invalid uplink authorization, if so, performs step 406, otherwise performs step 407;
The HARQ entity of UE side is by judging
the whether corresponding efficient resource of RIV of individual bit judges whether to receive invalid uplink authorization, if so, performs step 406, otherwise performs step 407.
Step 406: HARQ operation is not carried out to subframe;
The HARQ entity of UE side determines that invalid uplink authorization is indicated to subframe, then do not carry out HARQ operation to described subframe.
Step 407 is identical to the method for step 107 with existing step 105 to step 409, does not repeat them here.
The difference that the HARQ entity of UE side of the present invention carries out the method for existing HARQ operation shown in the method for HARQ operation and Fig. 2 is, first HARQ entity has judged whether that invalid uplink authorization is indicated to subframe, if, then end operation, otherwise operate according to the method for step 201 shown in Fig. 2 to step 206, do not repeat them here.
The method that HARQ for UE side of the present invention carries out sending upstream data is identical with the method that UE side HARQ existing shown in Fig. 3 carries out sending upstream data, does not repeat them here.
In preferred embodiment of the present invention, after base station detects when the up course allocation channel resource to multiple UE and there is resource contention, no longer send ACK information to HARQ entity, namely no longer by HARQ entity, ascending HARQ course data retransmission on predefined time-domain position is cancelled to the instruction of HARQ process, but send an invalid uplink authorization to HARQ entity, HARQ entity control HARQ process is made not carry out any operation, now the number of transmissions of HARQ process remains unchanged, like this, not only eliminate ascending HARQ course data retransmission on predefined time-domain position, and the number of transmissions cancelled also can not count the number of transmissions, avoid the problem that the residue HARQ error probability of happening that causes because the number of transmissions cancelled still counts the number of transmissions in existing method increases.In addition, although the present invention is using LTE system as embodiment, but because lte-a system inherits the HARQ method of LTE system substantially, method of the present invention can be applied to lte-a system equally, reduce to solve the HARQ process available transmission number of times existed in lte-a system, the problem that residue HARQ error probability of happening increases.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (5)
1. the method for uplink synchronous hybrid automatic retransmission query in mobile communication system, it is characterized in that, the method comprises:
A, base station judge the up process generation resource contention of multiple subscriber equipment during according to dispatching algorithm strategy, when being the lower user equipment allocation channel resource of service priority, generate invalid uplink authorization, and send invalid uplink authorization to the lower subscriber equipment of described service priority by Downlink Control Information;
The subscriber equipment that B, described service priority are lower receives Downlink Control Information, determine to receive invalid uplink authorization according to Downlink Control Information, the re-transmission of up hybrid automatic repeat request processes on predefine position is cancelled according to invalid uplink authorization, the number of transmissions remains unchanged, and the actual available transmission number of times of described up hybrid automatic repeat request processes does not reduce.
2. method according to claim 1, it is characterized in that, the method that base station described in steps A generates invalid uplink authorization is: the resource block assignments in the form DCI format 0 of Downlink Control Information and frequency-hopping resource allocation domain are arranged to by base station can not the resource indicated value of corresponding efficient resource.
3. method according to claim 2, it is characterized in that, base station described in steps A sends invalid uplink authorization by Downlink Control Information and to the method for the lower subscriber equipment of described service priority is: base station send resource block assignments and frequency-hopping resource allocation domain be configured to can not the DCI format 0 of resource indicated value of corresponding efficient resource to the lower subscriber equipment of described service priority.
4. method according to claim 1, it is characterized in that, determine that the method receiving invalid uplink authorization is according to Downlink Control Information described in step B: the up mixed automatic repeat request HARQ entity that the subscriber equipment that described service priority is lower comprises is according to the Downlink Control Information received, determine resource indicated value in the form DCI format 0 of Downlink Control Information corresponding be invalid resource, then determine to receive invalid uplink authorization.
5. method according to claim 4, it is characterized in that, the method cancelling the re-transmission of up hybrid automatic repeat request processes on predefine position according to invalid uplink authorization described in step B is: described HARQ entity defines invalid uplink authorization and is indicated to subframe, then HARQ operation is not carried out to described subframe, do not send the instruction HARQ process that extremely described subframe is corresponding.
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| US10172155B2 (en) * | 2015-07-29 | 2019-01-01 | Qualcomm Incorporated | Bundling and hybrid automatic repeat request operation for enhanced machine-type communication |
| CN106686738A (en) | 2015-11-05 | 2017-05-17 | 索尼公司 | Apparatus and method of base station side and user equipment side, and wireless communication system |
| US9979581B2 (en) * | 2016-04-01 | 2018-05-22 | Mediatek Inc. | Control channel design for eLAA |
| US9948481B1 (en) * | 2016-10-07 | 2018-04-17 | Qualcomm Incorporated | Uplink voice and video enhancements |
| WO2018119749A1 (en) * | 2016-12-28 | 2018-07-05 | Mediatek Singapore Pte. Ltd. | Methods to support ul transmission on multiple numerologies in nr system |
| CN108429607B (en) * | 2017-02-14 | 2021-05-14 | 普天信息技术有限公司 | HARQ retransmission processing method in communication system |
| WO2018169347A1 (en) | 2017-03-16 | 2018-09-20 | 엘지전자 주식회사 | Operation method of terminal and base station in wireless communication system, and device supporting same |
| BR112019026208A2 (en) * | 2017-06-15 | 2020-06-30 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | data transmission method, network device and user equipment comprising a processing unit and a communication unit, computer-readable storage media |
| GB2565772B (en) * | 2017-08-17 | 2020-02-26 | Tcl Communication Ltd | Improvements in or relating to UL Grant Free Transmissions - Configuration and resource bundling |
| CN109600848B (en) * | 2017-10-02 | 2024-03-08 | 财团法人资讯工业策进会 | Base station and user equipment for mobile communication system |
| CN110167180B (en) * | 2018-02-11 | 2021-04-27 | 维沃移动通信有限公司 | Transmission method and equipment |
| WO2019178833A1 (en) * | 2018-03-23 | 2019-09-26 | Oppo广东移动通信有限公司 | Resource authorization method and device |
| CN111565092B (en) * | 2019-02-13 | 2022-01-04 | 大唐移动通信设备有限公司 | HARQ feedback method and terminal |
| CN116506068A (en) | 2019-03-28 | 2023-07-28 | 中兴通讯股份有限公司 | Information determining method and computer readable storage medium |
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