WO2012075897A1

WO2012075897A1 - Data processing method and device for backhaul sub-frame configuration handover

Info

Publication number: WO2012075897A1
Application number: PCT/CN2011/083157
Authority: WO
Inventors: 杨瑾; 毕峰; 梁枫; 吴栓栓; 袁明
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-12-07
Filing date: 2011-11-29
Publication date: 2012-06-14
Also published as: CN102571189B; CN102571189A

Abstract

Disclosed is a data processing method for backhaul sub-frame configuration handover. The network side and/or a relay node (RN) transmit an uncompleted Hybrid Automatic Repeat Request (HARQ) process of the backhaul before handover and the corresponding feedback information under the target backhaul sub-frame configuration after handover according to the backhaul handover information. Also disclosed are a data processing method for backhaul sub-frame configuration handover, and a device corresponding to the two methods. By way of the solution of the present invention, not only can backward compatibility be ensured but also problems of corresponding HARQ process transmission after the backhaul sub-frame configuration handover and feedback information processing can be solved without bringing in signalling overhead.

Description

Data processing method and device for backhaul link subframe configuration switching

The present invention relates to a Time Division Duplexing (TDD) system of the Third Generation Partnership Project (3GPP), Long Term Evolution (LTE), and Long Term Evolution Advanced (LTE-A). The subframe configuration switching technology of the backhaul link, in particular, relates to a data processing method and apparatus for backhaul link subframe configuration switching. Background technique

In a network that introduces a relay station (RN), as shown in FIG. 1, a link between an evolved base station (eNB) and a macro user equipment (M-UE, Macro User Equipment) in the network is called a direct transmission link. (Direct Link), the link between the eNB and the RN is called the backhaul link, also called the Un interface. The link between the RN and the Relay User Equipment (R-UE, Relay User Equipment) is called the access link. Access Link).

When using inband-relay, that is, when the backhaul link and the access link use the same frequency resource, the inband-relay transmitter will interfere with its own receiver (self-interference), so the backhaul chain Roads and access links cannot transmit or receive on the same frequency resource at the same time.

In the TDD system, this problem is solved by using different uplink and downlink subframes in a time division manner between the backhaul link and the access link, that is, the network side is configured for the backhaul link for the backhaul link. The uplink and downlink subframe configuration, also called Un UL/DL Sub-config, is configured on the uplink and downlink subframes of the backhaul link, and the RN no longer provides service data services for the R-UE, but performs data transmission with the eNB. .

In the LTE system, as shown in FIG. 2, a radio frame is represented by a dot-filled frame, a subframe is represented by a slanted frame, an OFDM symbol is represented by a blank frame, and a 10 ms radio frame is composed of 10 lms. A subframe is constructed, and one subframe includes a plurality of OFDM symbols. TDD system is full There are 7 different uplink and downlink subframe configurations, also called TDD UL/DL Config, as shown in Table 1, where "D" represents the downlink subframe and "U" represents the uplink subframe. S" represents a special subframe.

Table 1

For the backhaul link, since the #0, #1, #5, and #6 subframes need to carry broadcast information, synchronization signals, etc., and cannot be configured as Un subframes, the subframes that can be used for the Un DL include #2, # 3. #4, #7, #8, #9 subframes. There is no limit to the configuration of Un UL subframes. In addition, cells for RNs are not supported for TDD UL/DL Config #0 and #5.

According to the subframe configuration of the LTE TDD system, the corresponding Un UL/DL Sub-config under different TDD UL/DL Config is shown in Table 2-6, where DL:UL ratio indicates the configured Un DL/UL subframe. Proportion, the flag "U" at the corresponding subframe position indicates that the configuration is Un UL subframe, and the flag "D" indicates that the configuration is Un DL subframe, where Table 2 indicates Un UL/DL Sub for TDD UL/DL Config #1. -config; Table 3 shows Un UL/DL Sub-config for TDD UL/DL Config #2; Table 4 shows Un UL/DL Sub-config for TDD UL/DL Config #3; Table 5 shows for Un UL/DL Sub-config of TDD UL/DL Config #4; Table 6 shows that the Un UL/DL Sub-config ₀ network side for TDD UL/DL Config #6 uses the higher layer signaling configuration to indicate the specific TDD used by the RN. UL/DL Config and Un UL/DL Sub-config ₀

Backhaul sub frame DL: UL ratio Subframe number

Configuration 0 1 2 3 4 5 6 7 8 9

0 1 : 1 D U

1 U D

2 2: 1 D U D

3 U D D

4 2:2 u D u D Backhaul sub frame Subframe number

DL: UL ratio

Configuration 0 1 2 3 4 5 6 7 8 9

0 U D

1 : 1

1 D U

2 U D D

twenty one

3 D U D

4 U D D D

3: 1

5 D U D D

table 3

table 5

Table 6

Un UL/DL Sub-config indicates the RN by the network side. For the TDD system Un UL/DL Sub-config can be divided into different lists according to different TDD UL / DL Config and numbered, that is, as shown in Table 2-6, Un UL / DL corresponding to all TDD UL / DL Config Sub-config is arranged and numbered in a list, as shown in Table 7.

Backhaul sub frame TDD UL/DL Sub frame number

DL: UL ratio

Configuration Config 0 1 2 3 4 5 6 7 8 9

0 D U

1:1

1 U D

2 1 D U D

2:1

3 U D D

4 2:2 u D u D

5 U D

1:1

6 D U

7 U D D

2 2:1

8 D U D

9 U D D D

3:1

10 D U D D

11 2:1 U D D

3

12 3:1 u D D D

13 1:1 u D

14 2:1 u D D

15 4 u D D

16 3:1 u D D D

17 4:1 u D D D D

18 6 1:1 U D

Table 7

In the LTE system, the data transmission between the UE and the eNB needs to establish a hybrid automatic repeat request (HARQ) process and perform corresponding feedback.

For the uplink synchronous HARQ process, the UE performs uplink service data transmission on the configured resources, and the eNB generates downlink feedback information (ie, acknowledge/non-acknowledgement information ACK/NACK, Acknowledgement/ Negative Acknowledgement) to be carried in the physical HARQ according to the received decoding situation. The indication channel (PHICH, Physical Hybrid-ARQ Indicator Channel) is fed back to the UE, and may also indicate to the UE the corresponding uplink data reception status by using the New Data Indicator (NDI) in the uplink grant information (UL Grant). There is a fixed timing relationship between the uplink subframe where the service data transmission is located and the downlink subframe where the feedback information is located. The UE processes the corresponding uplink service data transmission according to the PHICH and/or the NDI indication in the corresponding downlink subframe, that is, when the indication is correct, the uplink HARQ process is ended, otherwise the uplink service data is retransmitted according to the scheduling of the eNB. . The number of Un UL subframes included in the back link subframe configuration Un UL/DL Sub-config is equal to the maximum Un UL HARQ process available for this Un UL/DL Sub-config, according to Table 7, Un UL/DL Sub- The largest Un UL HARQ process corresponding to config The quantity is shown in Table 8.

Table 8

For the downlink asynchronous HARQ process, the eNB schedules the resource location indicating the downlink service data transmission of the UE, and the UE receives the downlink service data according to the indication and generates uplink ACK/NACK feedback information according to the received decoding situation, and the corresponding physical uplink control channel (PUCCH, On the physical uplink link or the Physical Uplink Shared Channel (PUSCH), the feedback information is reported to the eNB, and the downlink subframe where the downlink service data is transmitted and the uplink subframe where the corresponding feedback information is located exist. Fixed timing relationship. The eNB processes the corresponding downlink service data transmission according to the feedback information of the UE, that is, when the UE feedbacks that the reception is correct, the downlink HARQ process is terminated, otherwise the eNB re-schedules the downlink service data to the UE for transmission.

For the backhaul link, the network side needs to configure the Un UL/DL Sub-config in addition to the TDD UL/DL Config for the RN. The TDD UL/DL Config configuration generally does not change, and the Un UL/DL Sub -config may reconfigure the RN by the network side according to network requirements, interference, etc., then when the Un UL/DL Sub-config used by the RN is changed, there are two kinds of Un UL/DL Sub-config handover HARQ process mapping. And feedback information processing issues. Currently There is still no corresponding solution to this problem. Summary of the invention

In view of this, the main object of the present invention is to provide a data processing method and apparatus for backhaul link subframe configuration switching, which solves the backhaul link HARQ process mapping and feedback when the Un UL/DL Sub-config used by the RN is changed. Information processing issues.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

The present invention provides a data processing method for backhaul link subframe configuration switching, including: the network side and/or the RN according to the backhaul link switching information, and the pre-switching backhaul link is not completed.

The HARQ process and corresponding feedback information are transmitted under the target backhaul link subframe configuration after handover.

In the above solution, the backhaul link switching information includes a original backhaul link subframe configuration and a target backhaul link subframe configuration and/or a HARQ process transmission factor of the pre-switch backhaul link.

In the above solution, the HARQ process transmission factor includes at least one of the following: the number of uplink HARQ processes that are not completed before the handover backhaul link, the number of downlink HARQ processes that are not completed before the handover backhaul link, and the downlink HARQ process of the pre-switchback backhaul link that the RN does not report on the network side. Feedback information, the network side does not indicate feedback information of the RN's pre-switching backhaul link uplink HARQ process and/or scheduling retransmission information.

In the above solution, the HARQ process and the corresponding feedback information that are not completed before the handover backhaul link are transmitted in the target backhaul link subframe configuration after the handover, where: the handover backhaul link has n outstanding uplink HARQ processes, and the handover is performed. The maximum number of available uplink HARQ processes corresponding to the post-target backhaul link subframe configuration is k. When A≥«, the network side is in the k backhaul link uplink (Un UL) subframes configured by the target backhaul link subframe. Selecting n un UL subframes, the scheduling indication RN sequentially carries n outstanding uplink HARQ processes on the selected Un UL subframe; and the RN performs the n uncompleted uplink HARQs according to the scheduling instruction of the network side. The process bearer is transmitted to the network side on the corresponding n Un UL subframes; When A <", the network side selects k of the n uncompleted uplink HARQ processes, and k "Un UL subframes of the link subframe configuration, and other "-A uncompleted uplink HARQ processes." The RN suspends or discards the k uncompleted uplink HARQ processes on the corresponding k Un UL subframes according to the network side scheduling indication, and the n and k are natural numbers.

In the above solution, when the other “-A uncompleted uplink HARQ processes are suspended, the method further includes: the RN carrying the uncompleted uplink HARQ processes on the target backhaul link according to the scheduling instruction of the network side. On the Un UL subframe of the frame configuration, it is transmitted to the network side.

In the above solution, the HARQ process and the corresponding feedback information that are not completed before the handover backhaul link are transmitted in the target backhaul link subframe configuration after the handover, and are: the original backhaul link subframe configuration and the target backhaul link subframe. When the number of the corresponding maximum available uplink HARQ processes is the same, the RN configures the Un UL sub-frame corresponding to each uplink HARQ process in the original backhaul link subframe and the Un UL sub-port corresponding to each uplink HARQ process in the target backhaul link subframe configuration. The frame-corresponding, and the uplink HARQ process that is not completed before the handover backhaul link is transmitted to the network side according to the correspondence mapping of the corresponding Un UL subframes configured in the target backhaul link subframe configuration.

In the foregoing solution, after the RN transmits the uplink HARQ process that is not completed by the handover backhaul link to the network side of the corresponding Un UL subframe configured in the target backhaul link subframe, the method further includes: the network side corresponding to each uplink HARQ process. The feedback information and/or the scheduled retransmission information are transmitted to the RN according to the corresponding timing of the target backhaul link subframe configuration.

In the above solution, the HARQ process and the corresponding feedback information that are not completed before the handover backhaul link are transmitted in the target backhaul link subframe configuration after the handover, where: the handover backhaul link has n uncompleted downlink HARQ processes, and the target The number of maximum available downlink HARQ processes corresponding to the backhaul link subframe configuration is k. When A≥«, the network side sequentially schedules n outstanding downlink HARQ processes, and carries n uncompleted downlink HARQ processes ⁷ on the backhaul link. The downlink (Un DL) subframe is transmitted to the RN, and the RN receives the n unfinished downlinks on the corresponding Un DL subframe. HARQ process;

When A < «, the network side selects k of the n outstanding downlink HARQ processes, and sequentially schedules the selected k uncompleted downlink HARQ processes, and the k uncompleted downlink HARQ processes 7| Transmitting to the RN on the Un DL subframe, suspending or discarding the other -k outstanding downlink HARQ processes; the RN receiving the k uncompleted on the corresponding Un DL subframe according to the indication of the network side In the downlink HARQ process, the n and k are natural numbers.

In the above solution, the method further includes: the network side transmits the suspended "unfinished downlink HARQ process scheduling bearer to the RN in the Un DL subframe configured by the target backhaul link subframe, and the RN according to the indication of the network side The uncompleted downlink HARQ process is received on the corresponding Un DL subframe.

In the above solution, after the network side transmits the downlink HARQ process that is not completed by the handover backhaul link to the RN in the Un DL subframe of the target backhaul link subframe configuration, the method further includes: the RN responds to each downlink HARQ process. The information is transmitted to the network side according to the corresponding timing of the target backhaul link subframe configuration.

In the above solution, the HARQ process and the corresponding feedback information that are not completed before the handover backhaul link are transmitted in the target backhaul link subframe configuration after the handover, and the RN will not report the downlink HARQ process of the pre-switchback backhaul link of the network side. The feedback information is carried on the first available Un UL subframe in the target backhaul link subframe configuration after handover, and is transmitted to the network side.

In the above solution, the HARQ process and the corresponding feedback information that are not completed before the handover backhaul link are transmitted in the target backhaul link subframe configuration after the handover, where: the network side will not indicate the uplink HARQ process of the RN before the handover backhaul link. The feedback information and/or the scheduled retransmission information are carried on the first available Un DL subframe in the target backhaul link subframe configuration after handover, and are transmitted to the RN.

In the above solution, the network side is any one or more of the following combinations: a base station (eNB), a network side RN, a cell cooperation entity (MCE), a gateway (GW), mobility Management (MME), Evolved Universal Terrestrial Radio Access Network (EUTRAN), Operations Management and Maintenance (OAM) Manager.

The present invention also provides a data processing apparatus for backhaul link subframe configuration switching, comprising: a data processing module, configured to switch, according to the backhaul link switching information, an HARQ process that is not completed before the handover backhaul link and corresponding feedback information The transmission is performed in the post-target backhaul link subframe configuration.

The apparatus further includes a configuration switching module for obtaining backhaul link switching information and notifying the data processing module.

The present invention further provides a data processing method for backhaul link subframe configuration switching, comprising: the network side and/or the RN discarding all uncompleted HARQ processes and/or corresponding feedback information of the backhaul link before handover.

In the above solution, the network side discards all the uncompleted HARQ processes and/or corresponding feedback information of the backhaul link before the handover, and the network side interrupts the transmission of all the uncompleted downlink HARQ processes of the backhaul link. / or transmission of the corresponding feedback information of the uplink HARQ process, and establishing a new downlink HARQ process for data transmission on the Un DL subframe of the target backhaul link subframe configuration.

In the foregoing solution, the RN discards all the uncompleted HARQ processes and/or corresponding feedback information of the backhaul link before the handover, and the RN interrupts the transmission of all the outstanding uplink HARQ processes of the backhaul link and/or The transmission of the feedback information corresponding to the downlink HARQ process of the backhaul link; according to the scheduling instruction of the network side, a new uplink HARQ process is established on the Un UL subframe configured in the target backhaul link subframe for data transmission.

The present invention further provides a data processing apparatus for backhaul link subframe configuration switching, comprising: a data processing module, configured to discard all outstanding HARQ processes and/or corresponding feedback information of the backhaul link before handover after handover.

Data processing method and device for backhaul link subframe configuration switching provided by the present invention, network The network side and/or the RN transmit the HARQ process that is not completed before the handover backhaul link and the corresponding feedback information in the target backhaul link subframe configuration after the handover according to the backhaul link switching information; thus, no signaling overhead can be introduced. At the same time, it ensures the backward compatibility, that is, is compatible with the LTE system, and solves the problem of processing the corresponding HARQ process transmission and feedback information after the backhaul link subframe configuration switching. DRAWINGS

1 is a schematic structural diagram of a network in which an RN is introduced in the prior art;

2 is a schematic diagram of a radio frame structure in an LTE system in the prior art;

3 is a schematic flowchart of a data processing method for implementing handover configuration of a backhaul link subframe according to the present invention;

FIG. 4 is a schematic structural diagram of a data processing apparatus for implementing handover of a backhaul link subframe configuration according to the present invention. The basic idea of the present invention is: The network side and/or the RN transmit the HARQ process that is not completed before the handover backhaul link and the corresponding feedback information in the target backhaul link subframe configuration after the handover according to the backhaul link switching information. .

The invention will be further described in detail below with reference to the drawings and specific embodiments.

The present invention implements a data processing method for backhaul link subframe configuration switching. As shown in FIG. 3, the method includes the following steps:

Step 101: The network side and/or the RN acquire backhaul link switching information.

Here, the backhaul link switching information includes an original backhaul link subframe configuration and a target backhaul link subframe configuration, and/or a HARQ process transmission factor of the pre-switched backhaul link;

The original backhaul link subframe configuration refers to a backhaul link subframe configuration used by the backhaul link before handover, and the target backhaul link subframe configuration refers to a backhaul link subframe configuration used by the backhaul link after handover; The backhaul link subframe configuration switching refers to switching between different backhaul link subframe configurations in the same TDD subframe configuration;

The HARQ process transmission factor includes at least one of the following: the number of uplink HARQ processes that are not completed before the handover backhaul link, the number of downlink HARQ processes that are not completed before the handover backhaul link, and the feedback information of the downlink HARQ process of the pre-switchback backhaul link that the RN does not report on the network side, The network side does not indicate feedback information and/or scheduling retransmission information of the RN's pre-switching backhaul link uplink HARQ process.

Step 102: After the backhaul link subframe configuration is switched, the network side and/or the RN configures the HARQ process that is not completed before the handover backhaul link and the corresponding feedback information in the target backhaul link subframe configuration after the handover according to the backhaul link handover information. Under transmission;

For example, the number of the maximum available uplink HARQ processes corresponding to the target backhaul link subframe is k, that is, the number of Un UL subframes is k, and the number of Un UL subframes is k. Among the k Un UL subframes configured in the backhaul link subframe, n of the Un UL subframes are selected, and the scheduling indication RN sequentially carries n outstanding uplink HARQ processes on the selected Un UL subframe; The network side scheduling indication carries the n outstanding uplink HARQ processes on the corresponding n Un UL subframes to the network side; when A < ", the network side is in the n uncompleted uplink HARQ processes. Selecting k, the scheduling indication RN carries the selected k outstanding uplink HARQ processes in sequence on the k Un UL subframes of the target backhaul link subframe configuration, and the other "-A uncompleted uplink HARQs" The process is suspended or discarded by the RN according to the network side scheduling indication, and the k uncompleted uplink HARQ processes are carried on the corresponding k Un UL subframes to the network side, where n and k are natural numbers;

Further, after the RN carries the n or k outstanding uplink HARQ processes on the corresponding n or k Un UL subframes and transmits to the network side, the network side sends feedback information and/or scheduling corresponding to each HARQ process. The retransmission information is transmitted to the RN according to a corresponding timing of the target backhaul link subframe configuration; Further, when the other n-k uncompleted uplink HARQ processes are suspended, the network side suspends "the incomplete uplink HARQ process scheduling indication RN transmits on the idle backhaul link uplink subframe, The RN carries the uncompleted uplink HARQ process on the Un UL subframe configured in the target backhaul link subframe according to the scheduling instruction on the network side, and transmits the signal to the network side.

For another example, when the number of the maximum available uplink HARQ processes corresponding to the original backhaul link subframe configuration and the target backhaul link subframe configuration is equal, that is, the original backhaul link subframe configuration and the target backhaul link subframe configuration include the same number of Un. In the UL subframe, the RN associates the Un UL subframe corresponding to each uplink HARQ process in the original backhaul link subframe with the Un UL subframe corresponding to each uplink HARQ process in the target backhaul link subframe configuration, and The uplink HARQ process that is not completed before the handover of the backhaul link is transmitted to the network side according to the correspondence mapping of the corresponding Un UL subframes configured in the target backhaul link subframe configuration;

Further, after the RN transmits the uplink HARQ process that is not completed before the handover backhaul link, the network side transmits the corresponding HARQ process to the network side after the mapping is performed on the corresponding Un UL subframe of the target backhaul link subframe configuration. The feedback information and/or the scheduled retransmission information are transmitted to the RN according to the corresponding timing of the target backhaul link subframe configuration.

For example, if the backhaul link has n unfinished downlink HARQ processes and the target backhaul link subframe configuration corresponds to the maximum available downlink HARQ process number k, when A≥«, the network side sequentially schedules n uncompleted downlink HARQs. The process, the n uncompleted downlink HARQ processes are carried on the Un DL subframe, and the RN receives the n uncompleted downlink HARQ processes on the corresponding Un DL subframe; Selecting k of the n outstanding downlink HARQ processes, scheduling the selected k uncompleted downlink HARQ processes in sequence, and transmitting the k outstanding downlink HARQ processes 7| to the RN on the Un DL subframe. Suspending or discarding the other -A outstanding downlink HARQ processes; the RN receives the k uncompleted downlink HARQ processes on the corresponding Un DL subframe according to the indication of the network side, where the n, k Natural number; Further, after the network side indicates the bearer's Un DL subframe, the RN feeds back the feedback information corresponding to each process to the network side according to the corresponding timing of the target backhaul link subframe configuration; further, the network side will hang. The "incomplete downlink HARQ process scheduling bearers are transmitted to the RN on the Un DL subframe of the target backhaul link subframe configuration, and the RN receives the "one outstanding downlink HARQ process on the corresponding Un DL subframe.

For example, the RN transmits the feedback information of the downlink HARQ process of the handover backhaul link that is not reported on the network side to the first available Un UL subframe in the target backhaul link subframe configuration, and transmits the information to the network side, where The first available Un UL subframe is the first Un UL subframe with an Un DL subframe interval of 4 ms or more in the downlink link of the backhaul link.

Here, if the downlink HARQ process of the handover backhaul link is carried in the Un DL subframe # w, the first available Un UL subframe in the target backhaul subframe configuration is an Un UL subframe.

# + /), where /≥4.

For example, the network side carries the feedback information and/or the scheduled retransmission information of the uplink HARQ process that does not indicate the pre-switching backhaul link of the RN to be carried on the first available Un DL subframe in the target backhaul link subframe configuration, The RN transmits, where the first available Un DL subframe is a first Un DL subframe with an Un UL subframe interval of 4 ms or more in which the uplink HARQ process of the backhaul link is greater than or equal to 4 ms.

Here, if the uplink HARQ process of the backhaul link before handover is carried in Un UL subframe #w, the first available Un DL subframe in the target backhaul subframe configuration is Un DL subframe.

# + where h > 4.

In the above method, the network side is any combination of one or more of the following: a base station (eNB), a RN as a network side, a cell cooperative entity (MCE), a gateway (GW), a mobility management (MME), and an evolution. Type Universal Terrestrial Radio Access Network (EUTRAN), Operations Management and Maintenance (OAM) Manager.

In order to implement the foregoing method, the present invention further provides a data processing apparatus for backhaul link subframe configuration switching, which is disposed in a network side and/or an RN. As shown in FIG. 4, the apparatus includes: The data processing module 41 is configured to: according to the backhaul link switching information, transmit the HARQ process that is not completed before the handover backhaul link and the corresponding feedback information in the target backhaul link subframe configuration after the handover;

The apparatus further includes a configuration switching module 42 for obtaining backhaul link switching information and notifying the data processing module 41.

The backhaul link switching information includes an original backhaul link subframe configuration and a target backhaul link subframe configuration, and/or a HARQ process transmission factor of the pre-switched backhaul link;

The HARQ process transmission factors include: the number of uplink HARQ processes that are not completed before the handover backhaul link, the number of downlink HARQ processes that are not completed before the handover backhaul link, and the feedback information of the downlink HARQ process of the pre-switchback backhaul link that the RN does not report on the network side, and the network side does not indicate Feedback information of the upstream HARQ process of the backhaul link of the RN and/or scheduling retransmission information;

When the data processing module 41 is configured on the network side and the RN, the data processing module 41 may be configured to: the data processing module 41 on the network side has n uncompleted uplink HARQ processes according to the backhaul link before the handover, and the target backhaul link subframe configuration corresponds to The maximum available uplink HARQ process number k, that is, the Un UL subframe number is k. When A≥«, the network side data processing module 41 selects among the k Un UL subframes configured in the target backhaul link subframe. The Un UL subframes, the scheduling indication RN sequentially carries n outstanding uplink HARQ processes on the selected Un UL subframe; the data processing module 41 of the RN performs the n uncompleted according to the scheduling instruction of the network side. The uplink HARQ process is transmitted to the network side on the corresponding _n Un UL subframes; when < ”, the network side data processing module 41 selects k among the n uncompleted uplink HARQ processes, the link sub On the k Un UL subframes of the frame configuration, the other uncompleted uplink HARQ processes are suspended or discarded; the data processing module 41 of the RN performs the k uncompleted uplink HARQ processes according to the scheduling instruction of the network side. 7|Loaded in the corresponding k Un UL sub On a transmission side to a network; said data processing module 41 is provided at the network side, and when the RN, may also be used specifically: The feedback information and/or the scheduled retransmission information are carried in the first one of the target backhaul link subframe configurations after the handover according to the feedback information and/or the scheduled retransmission information of the uplink HARQ process of the handover backhaul link that does not indicate the RN. On the available Un DL subframe, transmit to the RN;

When the data processing module 41 is set in the RN, it can be specifically used to:

The number of the maximum available uplink HARQ processes corresponding to the original backhaul link subframe configuration and the target backhaul link subframe configuration is equal, that is, the original backhaul link subframe configuration and the target backhaul link subframe configuration include the same number of Un UL subframes. The Un UL subframe corresponding to each uplink HARQ process in the original backhaul link subframe configuration corresponds to the Un UL subframe corresponding to each uplink HARQ process in the target backhaul link subframe configuration, and the backhaul link is not completed before the handover. The uplink HARQ process is transmitted to the network side on the corresponding Un UL subframe of the target backhaul link subframe configuration according to the correspondence mapping;

When the data processing module 41 is set in the RN, it can also be specifically used to:

The feedback information is carried according to the feedback information of the downlink HARQ process of the handover backhaul link that is not reported on the network side, and the feedback information is carried in the first available Unconfigured target backhaul link subframe configuration.

On the UL subframe, it is transmitted to the network side.

The present invention also provides a data processing method for backhaul link subframe configuration switching, the method comprising:

The network side and/or the RN discard all outstanding HARQ processes and/or corresponding feedback information of the backhaul link before handover;

The network side discards all the uncompleted HARQ processes and/or corresponding feedback information of the backhaul link before the handover, specifically, the network side interrupts the transmission of all the uncompleted downlink HARQ processes of the backhaul link. / or transmission of the corresponding feedback information of the uplink HARQ process, and establishing a new downlink HARQ process for data transmission on the Un DL subframe of the target backhaul link subframe configuration;

After the handover, the RN discards all outstanding HARQ processes of the backhaul link before handover and/or Corresponding feedback information, specifically, the RN interrupts transmission of all outstanding uplink HARQ processes of the backhaul link and/or transmission of feedback information corresponding to the downlink HARQ process of the backhaul link, according to the scheduling instruction of the network side, at the target A new uplink HARQ process is established on the Un UL subframe configured in the backhaul link subframe for data transmission;

In order to implement the foregoing method, the present invention further provides a data processing apparatus for backhaul link subframe configuration switching, where the apparatus is disposed on the network side and/or the RN, and includes:

a data processing module, configured to discard all outstanding HARQ processes and/or corresponding feedback information of the backhaul link before the handover after the handover;

When the data processing module is configured on the network side, it is specifically configured to interrupt transmission of all outstanding downlink HARQ processes of the backhaul link before the handover and/or transmission of feedback information corresponding to the uplink HARQ process, and the Unconfigured in the target backhaul link subframe. Establishing a new downlink HARQ process on the DL subframe for data transmission;

When the device is configured on the network side, the method further includes: a scheduling indication module, configured to: instruct the RN to establish a new uplink HARQ process to perform data transmission on the Un UL subframe configured in the target backhaul link subframe;

When the data processing module is set in the RN, specifically, it is used to interrupt transmission of all outstanding uplink HARQ processes of the backhaul link and/or transmission of feedback information corresponding to the downlink HARQ process of the backhaul link, and according to scheduling on the network side. Instructing to establish a new uplink HARQ process for data transmission on the Un UL subframe configured in the target backhaul link subframe. The following embodiments are all TDD systems, with the eNB as the network side, and the Un UL/DL Sub-config indicated by the eNB as the RN.

In the following embodiments, the description is made in the manner of Table 2-6, that is, the different TDD UL/DL Config are divided into different lists and corresponding serial numbers.

Embodiment 1 In this embodiment, TDD UL/DL Config #1 is taken as an example. The eNB configuration instructs the RN to perform backhaul link subframe configuration switching, and uses Un UL/DL Sub-config #2 as the target backhaul link subframe configuration.

Before the handover, the backhaul link has one outstanding uplink HARQ process, and the Un UL/DL Sub-config #2 configuration includes one Un UL subframe #8, that is, the maximum available uplink HARQ process number is 1, then the eNB schedules After the RN is instructed to switch, the uncompleted uplink HARQ process is carried on the Un UL subframe #8, and the RN carries the uncompleted uplink HARQ process on the Un UL subframe #8 according to the scheduling indication of the eNB, and transmits the signal to the eNB.

After the handover, the eNB transmits the feedback information and/or the scheduled retransmission information of the uplink HARQ process that continues to be transmitted on the backhaul link according to the timing relationship corresponding to the target backhaul link subframe configuration, and the RN transmits according to the corresponding Un DL subframe. The feedback information of the eNB or the scheduled retransmission information ends the uplink HARQ process or performs retransmission. Embodiment 2

In this embodiment, the TDD UL/DL Config #2 is used as an example, and the original backhaul link subframe is configured as Un UL/DL Sub-config #3. The eNB configures the RN to perform the backhaul link subframe configuration switch according to the network load requirement. Use Un UL/DL Sub-config #4 for the target backhaul link subframe configuration.

The maximum number of available uplink HARQ processes corresponding to the original backhaul link subframe configuration and the target backhaul link subframe configuration is equal to k, l = Un UL/DL Sub-config #3 contains an Un UL subframe #7, Un UL /DL Sub-config #4 includes an Un UL subframe #2, then the RN will unsub subframe #7 in the original backhaul link subframe configuration and Un UL subframe #2 in the target backhaul link subframe configuration. - Corresponding, and carrying the uncompleted uplink HARQ process mapping carried on the Un UL subframe #7 in the original backhaul subframe subframe configuration on the Un UL subframe #2 of the target backhaul link subframe configuration to the eNB transmission.

After the handover, the eNB feeds back the feedback information and/or the scheduled retransmission information of the uplink HARQ process that continues to be transmitted on the backhaul link according to the timing relationship of the target backhaul link subframe configuration. The RN transmits on the Un DL subframe, and the RN ends the uplink HARQ process or performs retransmission according to the feedback information of the eNB or the scheduled retransmission information.

Embodiment 3

In this embodiment, TDD UL/DL Config #1 is taken as an example. The eNB configuration instructs the RN to perform backhaul link subframe configuration switching, and uses Un UL/DL Sub-config #2 as the target backhaul link subframe configuration.

There are 2 outstanding uplink HARQ processes on the backhaul link before handover, and Un UL/DL Sub-config #2 contains only one Un UL subframe #8, that is, the maximum number of available uplink HARQ processes is 1, because the original backhaul link uses Un. UL/DL Sub-config #4, that is, the two outstanding uplink HARQ processes of the backhaul link are respectively carried on Un UL subframes #3 and #8, and the eNB selects the original backhaul link subframe configuration to be carried in Un. The uncompleted uplink HARQ process on the UL subframe #8 continues to be transmitted, that is, the scheduling indicates that the untagged uplink HARQ process is carried on the Un UL subframe #8 of the Un UL/DL Sub-config #2 after the RN handover. The uplink HARQ process that is not completed on the Un UL subframe #3 is suspended before the handover; the RN carries the selected outstanding uplink HARQ process 7| on the Un UL subframe #8 to the eNB according to the scheduling indication of the eNB. Transfer, suspend or discard another upstream HARQ process data.

After the handover, the eNB transmits the feedback information and/or the scheduled retransmission information of the uplink HARQ process that continues to be transmitted on the backhaul link according to the timing relationship corresponding to the target backhaul link subframe configuration, and the RN transmits according to the corresponding Un DL subframe. The feedback information of the eNB or the scheduled retransmission information ends the uplink HARQ process or performs retransmission.

Further, when the Un UL subframe #8 is idle, the eNB schedules an indication to the RN to transmit the suspended uplink, and the RN carries the suspended outstanding HARQ process in the Un UL subframe according to the scheduling indication of the eNB. 8 is transmitted to the eNB.

Embodiment 4 In this embodiment, TDD UL/DL Config #4 is taken as an example. The eNB configuration instructs the RN to perform backhaul link subframe configuration switching, and uses Un UL/DL Sub-config #3 as the target backhaul link subframe configuration.

There are two outstanding downlink HARQ processes on the backhaul link before handover, and the maximum available downlink HARQ processes corresponding to Un UL/DL Sub-config #3 are k, k = 3. eNB scheduling finger

#9上, indicating and transmitting to the RN, the RN receives two uncompleted downlink HARQ processes on the Un DL subframes #8, #9 according to the indication of the eNB.

After the handover, the RN feeds back the feedback information corresponding to the two HARQ processes to the eNB according to the corresponding timing of the target backhaul link subframe configuration, and the eNB ends the HARQ process or the scheduling configuration indication according to the feedback information of the RN. pass.

Embodiment 5

In this embodiment, TDD UL/DL Config #4 is taken as an example. The eNB configuration instructs the RN to perform backhaul link subframe configuration switching, and uses Un UL/DL Sub-config #2 as the target backhaul link subframe configuration.

Before the handover, the backhaul link has three uncompleted downlink HARQ processes, and the Un UL/DL Sub-config #2 corresponds to the maximum available downlink HARQ process number k, k2, and the three uncompleted downlink HARQ processes. When the original backhaul link subframe configuration is carried on Un DL subframes #7, #8, and #9, the eNB selects two processes that overlap with the Un DL subframe included in Un UL/DL Sub-config #2. That is, the uncompleted downlink HARQ process carried in the Un DL subframes #8 and #9, and the selected two uncompleted downlink HARQ processes are sequentially carried in the Un DL sub of Un UL/DL Sub-config #2 after the handover. Frames #8 and #9 are transmitted to the RN, and the downlink HARQ process carried in Un DL subframe #7 in the original backhaul subframe configuration is suspended. The RN receives two uncompleted downlink HARQ processes on Un DL subframes #8 and #9 according to the indication of the eNB.

After the handover, the RN compares the feedback information corresponding to the two HARQ processes according to the target backhaul link. The corresponding timing of the frame configuration is fed back to the eNB on the Un UL subframe, and the eNB ends the HARQ process or the scheduling configuration indication according to the feedback information of the RN to perform retransmission.

Further, when the Un DL subframe #8 or #9 is idle, the eNB loads the pending downlink HARQ process on the Un DL subframe #7 before the pending handover in the idle Un DL subframe #8 or # The transmission is performed on the RN, and the RN receives the downlink HARQ process and performs feedback.

Embodiment 6

In this embodiment, TDD UL/DL Config #1 is taken as an example. The eNB configuration instructs the RN to perform backhaul link subframe configuration switching, and uses Un UL/DL Sub-config #4 as the target backhaul link subframe configuration.

Before the handover, the backhaul link uses Un UL/DL Sub-config #3, and the downlink HARQ process is transmitted to the RN on Un DL subframe #4 and Un DL subframe #9, and the RN generates the corresponding HARQ process. ACK/NACK feedback information, at which time the RN performs a backhaul link subframe configuration switching procedure according to the configuration indication of the eNB, that is, the RN includes two Un UL subframes according to Un UL/DL Sub-config #4: Un UL subframe #3, Un UL subframe #8, can be used to report feedback information to the eNB, and the subframe interval between Un UL subframe #3 and the downlink HARQ process between Un DL subframe #4 and Un DL subframe #9 If the value is greater than or equal to 4 ms, the Un UL subframe #3 is the first available Un UL subframe in the target backhaul link subframe configuration, and the RN carries the corresponding ACK/NACK information on the Un UL subframe #3, and reports to the eNB. .

Example 7

In this embodiment, TDD UL/DL Config #2 is taken as an example. The eNB configuration instructs the RN to perform backhaul link subframe configuration switching, and uses Un UL/DL Sub-config #4 as the target backhaul link subframe configuration.

Before the handover, the backhaul link uses Un UL/DL Sub-config #3, and the RN transmits an uplink HARQ process to the eNB in Un UL subframe #7, and the eNB generates corresponding ACK/NACK feedback information after receiving the HARQ process. The RN performs the backhaul link subframe configuration according to the configuration indication of the eNB. The handover process, that is, the eNB includes three Un DL subframes according to Un UL/DL Sub-config #4: Un DL subframe #3, Un DL subframe #4, Un DL subframe #8, can be used for The feedback information indicates to the RN that the subframe interval between the Un DL subframe #3 and the Un UL subframe #7 where the uplink HARQ process is located is greater than or equal to 4 ms, and the Un DL subframe #3 is the target backhaul link subframe configuration. For an available Un DL subframe, the eNB carries the corresponding ACK/NACK information indication to the RN on Un DL subframe #3.

Example eight

In this embodiment, TDD UL/DL Config #3 is taken as an example, the original backhaul link subframe is configured as Un UL/DL Sub-config #0, and the eNB configuration instructs the RN to perform backhaul link subframe configuration switching, using Un UL/DL. Sub-config #1 is the target backhaul link subframe configuration.

Before the handover, the downlink link has two downlink HARQ processes and one uplink HARQ process being transmitted. After the handover, the eNB discards the two uncompleted downlink HARQ processes before the handover, and the RN discards the uncompleted uplink HARQ process; that is, the eNB Interrupt the transmission of 2 outstanding downlink HARQ processes and the transmission of feedback information corresponding to 1 uplink HARQ process, and establish a new HARQ process for data transmission on the Un DL subframe of Un UL/DL Sub-config #1 The RN interrupts the transmission of the uncompleted one uplink HARQ process and the transmission of the feedback information corresponding to the two downlink HARQ processes, and according to the scheduling indication of the eNB, on the Un UL subframe of Un UL/DL Sub-config #1 Establish a new uplink HARQ process for data transmission.

With the method of the present invention, the network side and/or the RN can implement data processing of the backhaul link subframe configuration switching, and not only introduce signaling overhead, but also ensure backward compatibility, that is, compatible with the LTE system, and solve the problem. The processing of the corresponding HARQ process transmission and feedback information after the handover of the backhaul link subframe configuration.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included. Within the scope of protection of the present invention.

Claims

Claim

A data processing method for backhaul link subframe configuration switching, characterized in that the method comprises:

The network side and/or the relay station (RN) transmits the hybrid automatic repeat request ( HARQ ) process and the corresponding feedback information that are not completed before the handover backhaul link according to the backhaul link switching information, and are transmitted under the target backhaul link subframe configuration after the handover. .

2. The data processing method according to claim 1, wherein the backhaul link switching information comprises an original backhaul link subframe configuration and a target backhaul link subframe configuration and/or a HARQ process transmission of a pre-switch backhaul link. factor.

The data processing method according to claim 2, wherein the HARQ process transmission factor comprises at least one of the following: the number of uplink HARQ processes that are not completed before the handover backhaul link, and the number of downlink HARQ processes that are not completed before the handover backhaul link. The RN does not report the feedback information of the downlink HARQ process of the pre-switching backhaul link on the network side, the feedback information of the uplink HARQ process of the pre-switching backhaul link of the RN that is not indicated by the network side, and/or the scheduling retransmission information.

The data processing method according to claim 2, wherein the HARQ process that is not completed before the handover backhaul link and the corresponding feedback information are transmitted in the target backhaul link subframe configuration after the handover, as follows: The front backhaul link has n outstanding uplink HARQ processes, and the maximum available uplink HARQ process corresponding to the target backhaul link subframe configuration after handover is k. When A≥«, the network side is configured in the target backhaul link subframe. In the backhaul link uplink (Un UL) subframe, the n Un UL subframes are selected, and the scheduling indication RN sequentially carries n outstanding uplink HARQ processes on the selected Un UL subframe; the RN according to the network side The scheduling indication is that the n outstanding uplink HARQ processes 7 are carried on the corresponding n Un UL subframes and transmitted to the network side;

When A <", the network side selects k among the n outstanding uplink HARQ processes, On the k Un UL subframes of the link subframe configuration, the other "-A outstanding uplink HARQ processes are suspended or discarded; the RN carries the k outstanding uplink HARQ processes according to the network side scheduling indication. The data is transmitted to the network side on the corresponding k Un UL subframes, where n and k are natural numbers.

The data processing method according to claim 4, wherein, when the other "-A uncompleted uplink HARQ processes are suspended, the method further includes: the RN according to the scheduling instruction of the network side The completed n-k uplink HARQ processes are carried on the Un UL subframe of the target backhaul link subframe configuration, and are transmitted to the network side.

The data processing method according to claim 2, wherein the HARQ process that is not completed before the handover backhaul link and the corresponding feedback information are transmitted in the target backhaul link subframe configuration after the handover, where: When the number of the maximum available uplink HARQ processes corresponding to the backhaul link subframe configuration and the target backhaul link subframe configuration is equal, the RN configures the Un UL subframe and the target backhaul link corresponding to each uplink HARQ process in the original backhaul link subframe configuration. The Un UL subframe corresponding to each uplink HARQ process in the subframe configuration—corresponding, and the uplink HARQ process that is not completed before the handover backhaul link is mapped to the corresponding Un UL subframe configured in the target backhaul link subframe according to the correspondence relationship. Transfer to the network side.

The data processing method according to claim 4, 5 or 6, wherein the RN carries the uplink HARQ process that is not completed before the handover backhaul link to the corresponding Un UL subframe of the target backhaul link subframe configuration to the network. After the side transmission, the method further includes: the network side transmitting, by the network side, feedback information and/or scheduling retransmission information corresponding to each uplink HARQ process to the RN according to a corresponding timing of the target backhaul link subframe configuration.

The data processing method according to claim 2, wherein the HARQ process and the corresponding feedback information that are not completed before the handover backhaul link are transmitted under the target backhaul link subframe configuration after the handover, as follows: The front backhaul link has n unfinished downlink HARQ processes, and the target backhaul link subframe configuration corresponds to the maximum available downlink HARQ process number k. When A≥«, the network side sequentially schedules n uncompleted downlink HARQ processes, which will be n. Unfinished downstream HARQ The process is carried on the downlink (Un DL) subframe of the backhaul link to the RN, and the RN receives the n uncompleted downlink HARQ processes on the corresponding Un DL subframe.

The data processing method according to claim 8, wherein the method further comprises: the network side scheduling the suspended uncompleted downlink HARQ process to be carried in the Un DL subframe of the target backhaul link subframe configuration. Up to the RN transmission, the RN receives the "-uncompleted downlink HARQ process on the corresponding Un DL subframe according to the indication of the network side.

The data processing method according to claim 8 or 9, wherein the network side carries the downlink HARQ process that is not completed before the handover backhaul link is carried in the Un DL subframe of the target backhaul link subframe configuration, and is transmitted to the RN. The method further includes: the RN transmitting the feedback information corresponding to each downlink HARQ process to the network side according to a corresponding timing of the target backhaul link subframe configuration.

The data processing method according to claim 2, wherein the HARQ process that is not completed before the handover backhaul link and the corresponding feedback information are transmitted in the target backhaul link subframe configuration after the handover, as: RN The feedback information of the downlink HARQ process of the handover backhaul link that is not reported on the network side is carried on the first available Un UL subframe in the target backhaul link subframe configuration, and is transmitted to the network side.

The data processing method according to claim 2, wherein the HARQ process and the corresponding feedback information that are not completed before the handover backhaul link are transmitted under the target backhaul link subframe configuration after the handover, where: The side carries the feedback information and/or the scheduled retransmission information of the uplink HARQ process that does not indicate the pre-switching backhaul link of the RN to be carried in the target backhaul link subframe after the handover. The first available Un DL subframe in the configuration is transmitted to the RN.

The data processing method according to claim 1, wherein the network side is any one or more of the following combinations: a base station (eNB), a network side RN, and a cell cooperation entity (MCE). Gateway (GW), Mobility Management (MME), Evolved Universal Terrestrial Radio Access Network (EUTRAN), Operations Management and Maintenance (OAM) Manager.

14. A data processing apparatus for backhaul link subframe configuration switching, the apparatus comprising:

The data processing module is configured to transmit, according to the backhaul link switching information, the HARQ process that is not completed before the handover backhaul link and the corresponding feedback information in the target backhaul link subframe configuration after the handover.

The data processing apparatus according to claim 14, wherein the apparatus further comprises a configuration switching module configured to acquire backhaul link switching information and notify the data processing module.

The network side and/or the RN discard all outstanding HARQ processes and/or corresponding feedback information of the backhaul link before handover.

The data processing method according to claim 16, wherein the network side discards all uncompleted HARQ processes of the backhaul link before handover and/or corresponding feedback information of the corresponding feedback signal or uplink HARQ process after the handover. The transmission, and establishing a new downlink HARQ process for data transmission on the Un DL subframe of the target backhaul link subframe configuration.

The data processing method according to claim 16, wherein the RN discards all uncompleted HARQ processes of the backhaul link before handover and/or corresponding feedback of the corresponding feedback signal backhaul link downlink HARQ process after handover Transmission of information; according to the scheduling instructions on the network side, A new uplink HARQ process is established on the Un UL subframe configured in the target backhaul link subframe for data transmission.

19. A data processing apparatus for backhaul link subframe configuration switching, the apparatus comprising:

The data processing module is configured to discard all outstanding HARQ processes and/or corresponding feedback information of the backhaul link before the handover after the handover.