CN101873631B - Processing method and system for uplink data retransmission - Google Patents
Processing method and system for uplink data retransmission Download PDFInfo
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- CN101873631B CN101873631B CN200910083052.9A CN200910083052A CN101873631B CN 101873631 B CN101873631 B CN 101873631B CN 200910083052 A CN200910083052 A CN 200910083052A CN 101873631 B CN101873631 B CN 101873631B
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Abstract
The invention discloses a processing method and a processing system for uplink data retransmission. In the scheme of the invention, a plurality of eNBs collaborate to perform CoMP uplink transmission and UE performs the uplink data retransmission according to the instruction of the eNB when the uplink data retransmission is needed; when receiving uplink scheduling information related to the retransmission transmitted by the serving eNB, the non-serving eNB receives the retransmission uplink data of the UE and transmits the data to the serving eNB; and when not receiving the uplink scheduling information related to the retransmission transmitted by the serving eNB, the non-serving eNB does not perform the operation related to the uplink data retransmission. The method has the advantages of making the behaviors of the serving eNB and the non-serving eNB clear, smoothly receiving the retransmission uplink data, solving the problem of the uplink data retransmission during the CoMP uplink transmission of the plurality of collaborative eNBs well, and adapting to the various special uplink data transmission scenes, along with no need of alteration of the uplink data transmission behavior on the UE side, easy implementation, and less required alteration of the LTE system.
Description
Technical field
The present invention relates to wireless communication technology, refer to especially a kind of based on many base station (eNB, EvolvedNodeB) processing method and the system of the uplink data retransmission of collaborative associating Multipoint process (CoMP, Coordinated Multiple Point).
Background technology
3G (Third Generation) Moblie Long Term Evolution (LTE, Long Term Evolution) Evolved UTRAN (E-UTRAN of system, Evolved Universal Terrestrial Radio Access Network) in, by eNB, be each user terminal (UE, User Equipment) Resources allocation, the data of uplink downlink are transmitted by up-downgoing shared channel.The access technology that E-UTRAN adopts is OFDM (OFDM, Orthogonal Frequency Division Multiplexing) technology, the RRM of E-UTRAN system is compared with second generation mobile communication system, there is the feature of large bandwidth, many time courses, the Radio Resource of E-UTRAN system is with time and the appearance of frequency bidimensional, and the number of users that can carry increases greatly.
For the UE that is positioned at eNB covering edge, may receive the wireless signal near several adjacent eNB simultaneously, the wireless signal of this UE transmitting also can be received by near multiple eNB.In this case, can coordinate multiple eNB carries out combining of up-downgoing wireless signal receiving and combining transmission, so-called CoMP technology that Here it is to this UE simultaneously.Utilize CoMP technology and relevant signal processing technology, can carry out data diversity and spatial reuse to up-downgoing wireless signal, obtain the gain of wireless signal, improve reliability and the data throughout of transmission of wireless signals.
Multiple neighbor cells of CoMP participating may belong to same eNB to be controlled, and also may belong to different e NB (Inter eNB) and control.When CoMP occurs in different e NB, only down control channel (the PDCCH of an eNB therein of UE, Physical Downlink Control Channel) instruction of upper reception up-downgoing scheduling of resource, also only to same eNB, upload mixed automatic retransfer request (HARQ, Hybrid ARQ, Hybrid Automatic Repeat Request) feedback information and other measurement report information, this eNB is called service eNB (Serving eNB), the eNB of other CoMP participatings is called non-service eNB (Non-Serving eNB) or cooperation eNB (Collaborative eNB).The in the situation that of multiple eNB CoMP participating, the object that sends, combines reception for reaching up-downgoing data aggregate, service eNB need to send to non-service eNB by the X2 interface between eNB by scheduling of resource instruction, from but not service eNB can with service eNB identical time, frequency resource to UE send downlink data or from UE receive upstream data, as shown in Figure 1.
E-UTRAN system is supported HARQ function, HARQ adopt N road concurrent process stop etc. mode layer 1, between physical layer peer-entities to transmission block (TB, Transport Block) send and retransmit, with this, improve the reliability that transmission block successfully sends.These HARQ processes and HARQ entity are associated.For the transmitting uplink data of LTE system, ascending HARQ course number is 8, adopts synchronous transmission mechanism, that is to say that the transmission of an ascending HARQ course or re-transmission occur in fixed time, in the moment of receiving terminal, i.e. eNB known transmission generation in advance, do not need additionally to identify HARQ process number.
UE is at the upper HARQ feedback information that receives of the HARQ of eNB feedback channel (PHICH, Physical HARQ Indicator Channel), as ACK or NACK.For a concrete ascending HARQ course, if the HARQ feedback information of receiving is NACK, and uplink scheduling license (UL Grant) on PDCCH, do not detected, this ascending HARQ course is by automatic the moment that belongs to this ascending HARQ course at next one non-self-adapting data retransmission, as shown in Figure 2 A; If uplink scheduling license detected on PDCCH, this ascending HARQ course will belong to the moment automatic adaptive data retransmission of this ascending HARQ course at the next one.Or, New Data Flag (the NDI comprising in the uplink scheduling license that ascending HARQ course also can issue according to eNB on PDCCH, New Data Indication) determine it is to transmit new data or retransmit legacy data, during data re-transmission, this ascending HARQ course will belong to the moment automatic adaptive data retransmission of this ascending HARQ course at the next one, as shown in Figure 2 B.
Multiple eNB are collaborative to carry out in the situation of CoMP uplink, and UE only receives HARQ feedback information on the PHICH of service eNB conventionally, and determines whether to carry out data re-transmission according to the HARQ feedback information of receiving.While carrying out uplink data retransmission as for needs, whether non-service eNB participates in uplink data retransmission and how to participate in uplink data retransmission, does not provide clearly and describe in existing scheme.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of processing method and system of uplink data retransmission, the concrete processing of non-service eNB while specifying uplink data retransmission in the collaborative situation of carrying out CoMP uplink of multiple eNB.
For achieving the above object, technical scheme of the present invention is achieved in that
A processing method for uplink data retransmission, multiple base station eNB are worked in coordination with associating Multipoint process CoMP uplink, and in the time of need to carrying out uplink data retransmission, the method comprises: uplink data retransmission is carried out in the indication that user terminal UE sends according to service eNB; Non-service eNB receive that service eNB sends when retransmitting relevant uplink scheduling information, receive the re-transmission upstream data of UE, and send to service eNB; Do not receive that service eNB sends when retransmitting relevant uplink scheduling information, do not carry out the operation relevant to uplink data retransmission.
The indication that described UE sends according to service eNB further comprises before carrying out uplink data retransmission: service eNB sends NACK or uplink scheduling license to UE, to non-service eNB, does not send and retransmits relevant uplink scheduling information; The indication that described UE sends according to service eNB further comprises after carrying out uplink data retransmission: service eNB receives the re-transmission upstream data from UE.
The indication that described UE sends according to service eNB further comprises before carrying out uplink data retransmission: service eNB sends and retransmits relevant uplink scheduling information to non-service eNB, to UE, sends uplink scheduling license; Uplink data retransmission is carried out in the indication that described UE sends according to service eNB, is specially: the uplink scheduling license that UE sends according to service eNB is carried out adaptive retransmission to upstream data; The indication that described UE sends according to service eNB further comprises after carrying out uplink data retransmission: service eNB receives the re-transmission upstream data from UE and non-service eNB.
The described uplink scheduling information relevant to re-transmission at least comprises: the UE data re-transmission time; Described non-service eNB receives the re-transmission upstream data of UE, is specially: non-service eNB, when the described UE data re-transmission time arrives, receives the re-transmission upstream data of UE.
Described need to carry out uplink data retransmission before, further comprise: service eNB sends uplink scheduling information to non-service eNB, this uplink scheduling information comprises semi-persistent scheduling SPS configuration or Transmission Time Interval TTI configuration.
When described uplink scheduling information comprises SPS configuration, in described SPS configuration, comprise SPS and the SPS cycle of whether starting; The UE data re-transmission time comprising in the described uplink scheduling information relevant to re-transmission did not conflict with the UE data upload time on described each SPS cycle.
While comprising TTI configuration in described uplink scheduling information, in the described uplink scheduling information relevant to re-transmission, further comprise TTI configuration.
The indication that described UE sends according to service eNB further comprises before carrying out uplink data retransmission: when service eNB sends NACK to UE, to non-service eNB, do not send and retransmit relevant uplink scheduling information; Uplink data retransmission is carried out in the indication that described UE sends according to service eNB, is specially: the NACK that UE sends according to service eNB carries out non-self-adapting re-transmission to upstream data; The indication that described UE sends according to service eNB further comprises after carrying out uplink data retransmission: service eNB receives the re-transmission upstream data from UE;
The indication that described UE sends according to service eNB further comprises before carrying out uplink data retransmission: when service eNB sends the uplink scheduling information relevant to re-transmission to non-service eNB, to UE, send uplink scheduling license; Uplink data retransmission is carried out in the indication that described UE sends according to service eNB, is specially: the uplink scheduling license that UE sends according to service eNB is carried out adaptive retransmission to upstream data; The indication that described UE sends according to service eNB further comprises after carrying out uplink data retransmission: service eNB receives the re-transmission upstream data from UE and non-service eNB.
A kind for the treatment of system of uplink data retransmission, this system comprises: UE, service eNB and at least one non-service eNB, service eNB and non-service eNB are worked in coordination with associating Multipoint process CoMP uplink, in the time of need to carrying out uplink data retransmission, described UE is for retransmitting upstream data according to the indication of service eNB; Described service eNB is used to indicate UE and carries out uplink data retransmission or indicate UE to carry out uplink data retransmission and send and retransmit relevant uplink scheduling information to non-service eNB; Described non-service eNB for receive from service eNB to retransmit after relevant uplink scheduling information, receive from the re-transmission upstream data of UE and be sent to service eNB.
Described service eNB is further used for: receive the re-transmission upstream data from UE or UE and non-service eNB.
In the present invention program, multiple eNB are collaborative carries out CoMP uplink, and in the time of need to carrying out uplink data retransmission, UE carries out uplink data retransmission according to the indication of service eNB; Non-service eNB receive that service eNB sends when retransmitting relevant uplink scheduling information, receive the re-transmission upstream data of UE, and send to service eNB; Non-service eNB do not receive that service eNB sends when retransmitting relevant uplink scheduling information, do not carry out the operation relevant to uplink data retransmission, the behavior of clear and definite service eNB and non-service eNB, can complete smoothly the reception that retransmits upstream data, and not need the upstream data transmission behavior of UE side to modify.
The various technical schemes that provide in the present invention all can solve uplink data retransmission problem when multiple eNB are collaborative carries out CoMP uplink well, various HARQ feedbacks and HARQ sequence problem when multiple eNB are collaborative carries out uplink data retransmission have been avoided dexterously, be easy to realize, can adapt to various special upstream datas and transmit scene, as SPS, TTI binding etc., little to the change of LTE system requirements.
Accompanying drawing explanation
Fig. 1 utilizes CoMP technology to carry out the schematic network structure of multiple eNB Combined Treatment;
Fig. 2 A is that the non-self-adapting of LTE system ascending HARQ retransmits schematic diagram;
Fig. 2 B is the adaptive retransmission schematic diagram of LTE system ascending HARQ;
Fig. 3 is implementation one specific embodiment schematic flow sheet in the present invention;
Fig. 4 is implementation two specific embodiment one schematic flow sheets in the present invention;
Fig. 5 is implementation two specific embodiment two schematic flow sheets in the present invention;
Fig. 6 is implementation two specific embodiment three schematic flow sheets in the present invention;
Fig. 7 is implementation three specific embodiment schematic flow sheets in the present invention;
Fig. 8 is the collaborative uplink data retransmission system architecture schematic diagram that carries out CoMP uplink of multiple eNB in the present invention.
Embodiment
In the present invention, multiple eNB are collaborative carries out CoMP uplink, and in the time of need to carrying out uplink data retransmission, UE carries out uplink data retransmission according to the indication of service eNB; Non-service eNB receive that service eNB sends when retransmitting relevant uplink scheduling information, receive the re-transmission upstream data of UE, and send to service eNB; Non-service eNB do not receive that service eNB sends when retransmitting relevant uplink scheduling information, do not carry out the operation relevant to uplink data retransmission.Based on above scheme, specific implementation of the present invention mainly can be divided into three kinds of implementations.
Implementation one
Multiple eNB are collaborative carries out CoMP uplink, and in the time of need to carrying out uplink data retransmission, uplink data retransmission is only carried out between service eNB and UE, and non-service eNB does not participate in retransmitting reception and the processing of upstream data.Non-service eNB does not need to know has uplink data retransmission to occur, and does not also need to participate in retransmitting the reception of upstream data and the forwarding to service eNB.Now, be equivalent to CoMP and be temporarily cancelled, only have service eNB to receive and retransmit upstream data, the upstream data in single eNB receives scene.Uplink data retransmission finishes, while preparing to receive the upstream data of next new biography, service eNB sends uplink scheduling information to non-service eNB, non-service eNB participates in reception and the processing of the upstream data of new biography according to the uplink scheduling information of receiving, in the collaborative upstream data that carries out CoMP of many eNB, receive scene.
This implementation is easy to realize, and existing LTE system is not changed to requirement.Consider that CoMP itself just can reduce uplink data retransmission odds greatly; Consider if the first new upstream data that passes upstream data, i.e. transmission for the first time adopts still bust this of CoMP simultaneously, the gain that the receive diversity of so non-service eNB can provide uplink data retransmission may be very limited, therefore, when uplink data retransmission, cancelling CoMP will be a kind of reasonably selection.
Fig. 3 is implementation one specific embodiment schematic flow sheet in the present invention, and as shown in Figure 3, specific implementation process comprises the following steps:
Step 101: service eNB, after being ready to uplink data scheduling, sends to non-service eNB by uplink scheduling information by the X2 interface between eNB, comprises the information such as UE data upload time, uplink scheduling licensed content in this uplink scheduling information.
Non-service eNB is received after uplink scheduling information, determines that the head that receives UE passes the time of upstream data, and determine according to uplink scheduling information the frequency resource that the first biography of UE upstream data is used according to the UE data upload time comprising in this uplink scheduling information.
Step 102: service eNB issues the first uplink scheduling license that passes upstream data to UE on PDCCH.
Step 103:UE detects after uplink scheduling license, the UE data upload time arrive time at Uplink Shared Channel (UL-SCH, UpLink Shared Channel) the upper head biography upstream data that sends, service eNB and the non-service eNB common head that receives UE on identical running time-frequency resource passes upstream data.
Step 104: non-service eNB passes upstream data by the head of the UE receiving and is forwarded to service eNB by X2 interface, passes upstream data at service eNB place to the head of UE and carries out combined decoding.
Step 105: if the head of UE passes the unsuccessful reception of upstream data, service eNB will send HARQ feedback information NACK or uplink scheduling license to UE, require UE to carry out uplink data retransmission, service eNB does not notify non-service eNB to have uplink data retransmission to be about to occur, therefore, non-service eNB does not participate in retransmitting the reception of upstream data.
Step 106:UE detects after NACK or uplink scheduling license, will carry out uplink data retransmission according to NACK or uplink scheduling license, retransmits upstream data and is received and process separately by service eNB.
If retransmit upstream data, still receive unsuccessfully, repeating step 105 and step 106, until corresponding upstream data successfully receives or reaches the number of retransmissions upper limit.In this process, by service eNB, receive alone and process all the time the re-transmission upstream data of UE.
Implementation two
Multiple eNB are collaborative carries out CoMP uplink, and in the time of need to carrying out uplink data retransmission, uplink data retransmission is carried out between service eNB and UE and non-service eNB and UE, and non-service eNB participates in retransmitting reception and the processing of upstream data.Service eNB need to be notified the time that non-service eNB carries out uplink data retransmission, modulation and the coded message (MCS that uplink data retransmission adopts, Modulation and CodingScheme) etc. information, but, it is first biography upstream data or re-transmission upstream data that non-service eNB is not distinguished the upstream data of receiving, its processing mode is completely identical with the first biography of reception upstream data.
Because the communication between service eNB and non-service eNB needs the time, non-service eNB participates in uplink data retransmission may meet the sequential requirement that ascending HARQ non-self-adapting retransmits, therefore, under this implementation, can only consider adaptive retransmission, that is to say, service eNB need to, by issue uplink scheduling license to UE on PDCCH, indicate UE to carry out adaptive retransmission to upstream data.
Fig. 4 is implementation two specific embodiment one schematic flow sheets in the present invention, and as shown in Figure 4, specific implementation process comprises the following steps:
Step 201: service eNB, after being ready to uplink data scheduling, sends to non-service eNB by uplink scheduling information by the X2 interface between eNB, comprises the information such as UE data upload time, uplink scheduling licensed content in this uplink scheduling information.
Non-service eNB is received after uplink scheduling information, determines that the head that receives UE passes the time of upstream data, and determine according to uplink scheduling information the frequency resource that the first biography of UE upstream data is used according to the UE data upload time comprising in this uplink scheduling information.
Step 202: service eNB issues the first uplink scheduling license that passes upstream data to UE on PDCCH.
Step 203:UE detects after uplink scheduling license, sends the first upstream data that passes when the UE data upload time arrives on UL-SCH, and service eNB and the non-service eNB common head that receives UE on identical running time-frequency resource passes upstream data.
Step 204: non-service eNB passes upstream data by the head of the UE receiving and is forwarded to service eNB by X2 interface, passes upstream data at service eNB place to the head of UE and carries out combined decoding.
Step 205: if the head of UE passes the unsuccessful reception of upstream data, service eNB sends and retransmits relevant uplink scheduling information to non-service eNB, comprises the information such as UE data re-transmission time, uplink scheduling licensed content, MCS in this uplink scheduling information.
Non-service eNB is received and is retransmitted after relevant uplink scheduling information, according to the UE data re-transmission time comprising in this uplink scheduling information, determine the time of the re-transmission upstream data that receives UE, according to uplink scheduling information, determine the first frequency resource that upstream data is used, the MCS adopting according to the definite re-transmission of the MCS comprising in this uplink scheduling information upstream data of passing of UE.
In subsequent treatment, for non-service eNB, it is first upstream data or the re-transmission upstream data of passing that the upstream data of receiving is not needed to distinguish, in the UE data re-transmission time, receive the upstream data from UE, non-service eNB is identical with the processing of first biography uploading data to the processing of the upstream data of receiving.
Step 206: service eNB issues uplink scheduling license on PDCCH, requires UE to carry out uplink data retransmission.
Step 207:UE detects after uplink scheduling license, the UE data re-transmission time is carried out uplink data retransmission while arriving, on UL-SCH, corresponding upstream data is carried out to adaptive retransmission, service eNB and non-service eNB be the common re-transmission upstream data that receives UE on identical running time-frequency resource.
Step 208: non-service eNB is forwarded to service eNB by the re-transmission upstream data of the UE receiving by X2 interface, the re-transmission upstream data at service eNB place to UE carries out combined decoding.Non-service eNB can pass upstream data according to MCS counterweight and carry out rectification before sending re-transmission upstream data to service eNB.It is relevant with the specific implementation of LTE system whether non-service eNB carries out rectification to the re-transmission upstream data of receiving.
It is first upstream data or the re-transmission upstream data of passing that non-service eNB does not need to distinguish to the upstream data of receiving, in the UE data re-transmission time, receive the upstream data from UE, non-service eNB is identical with the processing of first biography uploading data to the processing of the upstream data of receiving.
If retransmit upstream data, still receive unsuccessfully, repeating step 205～step 208, until corresponding upstream data successfully receives or reaches the number of retransmissions upper limit.
Fig. 5 is implementation two specific embodiment two schematic flow sheets in the present invention, as shown in Figure 5, in the present embodiment, adopt semi-persistent scheduling (SPS while carrying out CoMP uplink multiple eNB are collaborative, Semi-Persistent Scheduling), specific implementation process comprises the following steps:
Step 301: service eNB, after being ready to uplink data scheduling, sends to non-service eNB by uplink scheduling information by the X2 interface between eNB, comprises the information such as uplink scheduling licensed content, SPS configuration in this uplink scheduling information.SPS is periodic transfer of data for scheduling of resource.In described SPS configuration, comprise SPS and the SPS cycle of whether starting.
Non-service eNB is received after uplink scheduling information, according to the SPS configuration comprising in this uplink scheduling information, obtain the SPS cycle, and according to SPS configuration, obtain UE data upload time on each SPS cycle, head that non-service eNB receives UE and pass time of upstream data, and according to uplink scheduling information, determine that UE is first and pass the frequency resource that upstream data is used.
Step 302: service eNB issues the first SPS uplink scheduling license (SPS UL Grant) that passes upstream data to UE on PDCCH.
Step 303:UE detects after the license of SPS uplink scheduling, sends the first upstream data that passes when the UE data upload time in current SPS cycle arrives on UL-SCH, and service eNB and the non-service eNB common head that receives UE on identical running time-frequency resource passes upstream data.
Step 304: non-service eNB passes upstream data by the head of the UE receiving and is forwarded to service eNB by X2 interface, passes upstream data at service eNB place to the head of UE and carries out combined decoding.
Step 305: if the head of UE passes the unsuccessful reception of upstream data, service eNB sends and retransmits relevant uplink scheduling information to non-service eNB, comprises the information such as UE data re-transmission time, uplink scheduling licensed content, MCS in this uplink scheduling information.Service eNB, when definite UE data re-transmission time, need to make UE data re-transmission time and the UE data upload time on the SPS cycle not conflict.
Non-service eNB is received and is retransmitted after relevant uplink scheduling information, according to the UE data re-transmission time comprising in this uplink scheduling information, determine the time of the re-transmission upstream data that receives UE, according to uplink scheduling information, determine the first frequency resource that upstream data is used, the MCS adopting according to the definite re-transmission of the MCS comprising in this uplink scheduling information upstream data of passing of UE.
In subsequent treatment, for non-service eNB, identical to the dynamic dispatching processing of the processing of the upstream data of receiving and first biography upstream data, in the UE data re-transmission time, receive the upstream data from UE.Owing to there being SPS configuration, the UE data upload time on the SPS cycle, the upstream data of non-service eNB automatic reception UE, and be forwarded to service eNB.
Step 306: service eNB issues uplink scheduling license on PDCCH, requires UE to carry out uplink data retransmission.
Step 307:UE detects after uplink scheduling license, the UE data re-transmission time is carried out uplink data retransmission while arriving, on UL-SCH, corresponding upstream data is carried out to adaptive retransmission, service eNB and non-service eNB be the common re-transmission upstream data that receives UE on identical running time-frequency resource.
Step 308: non-service eNB is forwarded to service eNB by the re-transmission upstream data of the UE receiving by X2 interface, the re-transmission upstream data at service eNB place to UE carries out combined decoding.
For non-service eNB, identical to the dynamic dispatching processing of the processing of the upstream data of receiving and first biography upstream data, in the UE data re-transmission time, receive and forward from the upstream data of UE and to service eNB.
If retransmit upstream data, still receive unsuccessfully, repeating step 305～step 308, until corresponding upstream data successfully receives or reaches the number of retransmissions upper limit.
Fig. 6 is implementation two specific embodiment three schematic flow sheets in the present invention, as shown in Figure 6, in the present embodiment, adopt Transmission Time Interval binding (TTIBundling while carrying out CoMP uplink multiple eNB are collaborative, Transmission Time Interval Bundling), specific implementation process comprises the following steps:
Step 401: service eNB, after being ready to uplink data scheduling, sends to non-service eNB by uplink scheduling information by the X2 interface between eNB, comprises the information such as UE data upload time, uplink scheduling licensed content, TTI configuration in this uplink scheduling information.
Non-service eNB is received after uplink scheduling information, according to the UE data upload time comprising in this uplink scheduling information, determine that the head of reception UE passes the time of upstream data, according to the TTI configuration comprising in this uplink scheduling information, obtain the relevant information of TTI, and determine according to uplink scheduling information the frequency resource that the first biography of UE upstream data is used.
Step 402: service eNB issues the first TTI uplink scheduling license (TTI UL Grant) that passes upstream data to UE on PDCCH.
Step 403:UE detects after the license of TTI uplink scheduling, sends the first upstream data that passes when the UE data upload time arrives on UL-SCH, and service eNB and the non-service eNB common head that receives UE on identical running time-frequency resource passes upstream data.
Step 404: non-service eNB passes upstream data by the head of the UE receiving and is forwarded to service eNB by X2 interface, passes upstream data at service eNB place to the head of UE and carries out combined decoding.
Step 405: if the head of UE passes the unsuccessful reception of upstream data, service eNB sends and retransmits relevant uplink scheduling information to non-service eNB, comprises the information such as UE data re-transmission time, uplink scheduling licensed content, MCS in this uplink scheduling information.If non-service eNB is not stored TTI configuration, to retransmitting relevant uplink scheduling information also need to comprise TTI configuration.TTI configuration is only just used when non-service eNB receives wave point data.
Non-service eNB is received and is retransmitted after relevant uplink scheduling information, according to the UE data re-transmission time comprising in this uplink scheduling information, determine the time of the re-transmission upstream data that receives UE, according to uplink scheduling information, determine the first frequency resource that upstream data is used, the MCS adopting according to the definite re-transmission of the MCS comprising in this uplink scheduling information upstream data of passing of UE.
Step 406: service eNB issues uplink scheduling license on PDCCH, requires UE to carry out uplink data retransmission.
Step 407:UE detects after uplink scheduling license, the UE data re-transmission time is carried out uplink data retransmission while arriving, on UL-SCH, corresponding upstream data is carried out to adaptive retransmission, service eNB and non-service eNB be the common re-transmission upstream data that receives UE on identical running time-frequency resource.
Step 408: non-service eNB is forwarded to service eNB by the re-transmission upstream data of the UE receiving by X2 interface, the re-transmission upstream data at service eNB place to UE carries out combined decoding.
For non-service eNB, identical with the processing of first biography upstream data to the processing of the upstream data of receiving, in the UE data re-transmission time, receive and forward from the upstream data of UE and to service eNB.
If retransmit upstream data, still receive unsuccessfully, repeating step 405～step 408, until corresponding upstream data successfully receives or reaches the number of retransmissions upper limit.
Implementation three
When service eNB utilizes NACK indication UE to carry out non-self-adapting re-transmission to upstream data, non-service eNB does not participate in retransmitting the reception of upstream data; Service eNB utilizes uplink scheduling to permit that, when indication UE carries out adaptive retransmission to upstream data, non-service eNB participation retransmits the reception of upstream data, and its processing mode is completely identical with the first biography of reception upstream data.Service eNB need to be notified the information such as the time that non-service eNB carries out uplink data retransmission, the MCS that uplink data retransmission adopts.In implementation three, service eNB utilizes NACK or uplink scheduling license to determine that UE carries out non-self-adapting re-transmission or adaptive retransmission to upstream data.
Fig. 7 is implementation three specific embodiment schematic flow sheets in the present invention, and as shown in Figure 7, specific implementation process comprises the following steps:
Step 501: service eNB, after being ready to uplink data scheduling, sends to non-service eNB by uplink scheduling information by the X2 interface between eNB, comprises the information such as UE data upload time, uplink scheduling licensed content in this uplink scheduling information.
Non-service eNB is received after uplink scheduling information, determines that the head that receives UE passes the time of upstream data, and determine according to uplink scheduling information the frequency resource that the first biography of UE upstream data is used according to the UE data upload time comprising in this uplink scheduling information.
Step 502: service eNB issues the first uplink scheduling license that passes upstream data to UE on PDCCH.
Step 503:UE detects after uplink scheduling license, sends the first upstream data that passes when the UE data upload time arrives on UL-SCH, and service eNB and the non-service eNB common head that receives UE on identical running time-frequency resource passes upstream data.
Step 504: non-service eNB passes upstream data by the head of the UE receiving and is forwarded to service eNB by X2 interface, passes upstream data at service eNB place to the head of UE and carries out combined decoding.
Step 505: if the head of UE passes the unsuccessful reception of upstream data, service eNB will send NACK to UE, requires UE to carry out uplink data retransmission.Because service eNB requires UE, upstream data is carried out to non-self-adapting re-transmission, therefore, service eNB does not notify non-service eNB to have uplink data retransmission to be about to occur, and like this, non-service eNB will not participate in retransmitting the reception of upstream data.
Step 506:UE detects after NACK, according to NACK, upstream data is carried out to non-self-adapting re-transmission, retransmits upstream data and is received and process separately by service eNB.
Step 507: if the still unsuccessful reception of the re-transmission upstream data of UE, service eNB determine upstream data is carried out to non-self-adapting re-transmission or adaptive retransmission, below take adaptive retransmission as example.Service eNB sends and retransmits relevant uplink scheduling information to non-service eNB, comprises the information such as UE data re-transmission time, uplink scheduling licensed content, MCS in this uplink scheduling information.
Non-service eNB is received and is retransmitted after relevant uplink scheduling information, according to the UE data re-transmission time comprising in this uplink scheduling information, determine the time of the re-transmission upstream data that receives UE, according to uplink scheduling information, determine the first frequency resource that upstream data is used, the MCS adopting according to the definite re-transmission of the MCS comprising in this uplink scheduling information upstream data of passing of UE.
Step 508: service eNB issues uplink scheduling license on PDCCH, requires UE to carry out uplink data retransmission.
Step 509:UE detects after uplink scheduling license, the UE data re-transmission time is carried out uplink data retransmission while arriving, on UL-SCH, corresponding upstream data is carried out to adaptive retransmission, service eNB and non-service eNB be the common re-transmission upstream data that receives UE on identical running time-frequency resource.
Step 510: non-service eNB is forwarded to service eNB by the re-transmission upstream data of the UE receiving by X2 interface, the re-transmission upstream data at service eNB place to UE carries out combined decoding.
It is first upstream data or the re-transmission upstream data of passing that non-service eNB does not need to distinguish to the upstream data of receiving, in the UE data re-transmission time, receive the upstream data from UE, non-service eNB is identical with the processing of first biography uploading data to the processing of the upstream data of receiving.
If retransmit upstream data, still receive unsuccessfully, repeating step 507～step 510, until corresponding upstream data successfully receives or reaches the number of retransmissions upper limit.
Implementation one and implementation three are equally applicable to the upstream datas such as SPS, TTI binding and transmit scene, and specific implementation is basic identical, does not repeat them here.
For the various embodiments described above, for simple description, therefore it is all expressed as to a series of combination of actions, but those skilled in the art should know, the present invention is not subject to the restriction of described sequence of movement, because according to the present invention, some step can adopt other orders or carry out simultaneously.
Fig. 8 is the collaborative uplink data retransmission system architecture schematic diagram that carries out CoMP uplink of multiple eNB in the present invention, as shown in Figure 8, this system comprises UE, service eNB and at least one non-service eNB, and service eNB and non-service eNB are worked in coordination with associating Multipoint process CoMP uplink
UE is for retransmitting upstream data according to the indication of service eNB; Service eNB is used to indicate UE and carries out uplink data retransmission or indicate UE to carry out uplink data retransmission and send and retransmit relevant uplink scheduling information to non-service eNB; Non-service eNB for receive from service eNB to retransmit after relevant uplink scheduling information, receive from the re-transmission upstream data of UE and be sent to service eNB.Service eNB is further used for receiving the re-transmission upstream data from UE or UE and non-service eNB.
The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention.
Claims (10)
1. a processing method for uplink data retransmission, multiple base station eNB are worked in coordination with associating Multipoint process CoMP uplink, in the time of need to carrying out uplink data retransmission, it is characterized in that, and the method comprises:
Uplink data retransmission is carried out in the indication that user terminal UE sends according to service eNB;
Non-service eNB receive that service eNB sends when retransmitting relevant uplink scheduling information, receive the re-transmission upstream data of UE, and send to service eNB, non-service eNB is forwarded to service eNB by the re-transmission upstream data of the UE receiving, and the re-transmission upstream data at service eNB place to UE carries out combined decoding; Do not receive that service eNB sends when retransmitting relevant uplink scheduling information, do not carry out the operation relevant to uplink data retransmission.
2. method according to claim 1, is characterized in that,
The indication that described UE sends according to service eNB further comprises before carrying out uplink data retransmission: service eNB sends NACK or uplink scheduling license to UE, to non-service eNB, does not send and retransmits relevant uplink scheduling information;
The indication that described UE sends according to service eNB further comprises after carrying out uplink data retransmission: service eNB receives the re-transmission upstream data from UE.
3. method according to claim 1, is characterized in that,
The indication that described UE sends according to service eNB further comprises before carrying out uplink data retransmission: service eNB sends and retransmits relevant uplink scheduling information to non-service eNB, to UE, sends uplink scheduling license;
Uplink data retransmission is carried out in the indication that described UE sends according to service eNB, is specially: the uplink scheduling license that UE sends according to service eNB is carried out adaptive retransmission to upstream data;
The indication that described UE sends according to service eNB further comprises after carrying out uplink data retransmission: service eNB receives the re-transmission upstream data from UE and non-service eNB.
4. method according to claim 3, is characterized in that,
The described uplink scheduling information relevant to re-transmission at least comprises: the UE data re-transmission time;
Described non-service eNB receives the re-transmission upstream data of UE, is specially: non-service eNB, when the described UE data re-transmission time arrives, receives the re-transmission upstream data of UE.
5. according to the method described in claim 3 or 4, it is characterized in that, described need to carry out uplink data retransmission before, further comprise: service eNB sends uplink scheduling information to non-service eNB, this uplink scheduling information comprises semi-persistent scheduling SPS configuration or Transmission Time Interval TTI configuration.
6. method according to claim 5, is characterized in that,
When described uplink scheduling information comprises SPS configuration, in described SPS configuration, comprise SPS and the SPS cycle of whether starting;
The UE data re-transmission time comprising in the described uplink scheduling information relevant to re-transmission did not conflict with the UE data upload time on described each SPS cycle.
7. method according to claim 5, is characterized in that, while comprising TTI configuration in described uplink scheduling information, further comprises TTI configuration in the described uplink scheduling information relevant to re-transmission.
8. method according to claim 1, is characterized in that,
The indication that described UE sends according to service eNB further comprises before carrying out uplink data retransmission: when service eNB sends NACK to UE, to non-service eNB, do not send and retransmit relevant uplink scheduling information; Uplink data retransmission is carried out in the indication that described UE sends according to service eNB, is specially: the NACK that UE sends according to service eNB carries out non-self-adapting re-transmission to upstream data; The indication that described UE sends according to service eNB further comprises after carrying out uplink data retransmission: service eNB receives the re-transmission upstream data from UE;
Or the indication that described UE sends according to service eNB further comprises before carrying out uplink data retransmission: when service eNB sends the uplink scheduling information relevant to re-transmission to non-service eNB, send uplink scheduling license to UE; Uplink data retransmission is carried out in the indication that described UE sends according to service eNB, is specially: the uplink scheduling license that UE sends according to service eNB is carried out adaptive retransmission to upstream data; The indication that described UE sends according to service eNB further comprises after carrying out uplink data retransmission: service eNB receives the re-transmission upstream data from UE and non-service eNB.
9. a treatment system for uplink data retransmission, this system comprises: UE, service eNB and at least one non-service eNB, service eNB and non-service eNB are worked in coordination with associating Multipoint process CoMP uplink, in the time of need to carrying out uplink data retransmission, it is characterized in that,
Described UE is for retransmitting upstream data according to the indication of service eNB;
Described service eNB is used to indicate UE and carries out uplink data retransmission or indicate UE to carry out uplink data retransmission and send and retransmit relevant uplink scheduling information to non-service eNB;
Described non-service eNB for receive from service eNB to retransmit after relevant uplink scheduling information, receive from the re-transmission upstream data of UE and be sent to service eNB;
Described non-service eNB is forwarded to service eNB by the re-transmission upstream data of the UE receiving, and the re-transmission upstream data at service eNB place to UE carries out combined decoding.
10. system according to claim 9, is characterized in that, described service eNB is further used for: receive the re-transmission upstream data from UE or UE and non-service eNB.
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| WO2014071581A1 (en) * | 2012-11-07 | 2014-05-15 | 华为技术有限公司 | Semi-persistent scheduling method and base station |
| CN104025694B (en) * | 2012-12-24 | 2018-10-09 | 华为技术有限公司 | Communication processing method, the apparatus and system of uplink and downlink separation |
| CN109756989B (en) * | 2013-02-01 | 2022-05-10 | 华为技术有限公司 | Data transmission method, user equipment and base station |
| CN104641586A (en) * | 2013-08-07 | 2015-05-20 | 华为技术有限公司 | Method for automatic retransmission, user equipment, and base station |
| US10142799B2 (en) * | 2014-08-19 | 2018-11-27 | Qualcomm Incorporated | Multicasting traffic using multi-connectivity |
| CN105591721A (en) | 2014-10-24 | 2016-05-18 | 杭州华为数字技术有限公司 | Method for uplink cooperation of cell, and base stations |
| CN107926025A (en) * | 2015-10-29 | 2018-04-17 | 华为技术有限公司 | A kind of method of uplink coordinated communication of multiple cell and base station |
| CN109921884B (en) * | 2017-12-13 | 2022-04-12 | 华为技术有限公司 | Data receiving and transmitting method, device and communication system |
| CN110198546B (en) * | 2018-02-27 | 2021-02-09 | 上海华为技术有限公司 | Scheduling method and network equipment |
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