CN102891743B - A kind of method and system of back haul link hybrid automatic repeat-request - Google Patents
A kind of method and system of back haul link hybrid automatic repeat-request Download PDFInfo
- Publication number
- CN102891743B CN102891743B CN201110205670.3A CN201110205670A CN102891743B CN 102891743 B CN102891743 B CN 102891743B CN 201110205670 A CN201110205670 A CN 201110205670A CN 102891743 B CN102891743 B CN 102891743B
- Authority
- CN
- China
- Prior art keywords
- subframe
- backhaul link
- supplementary
- harq process
- harq
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 258
- 101000741965 Homo sapiens Inactive tyrosine-protein kinase PRAG1 Proteins 0.000 claims abstract description 78
- 102100038659 Inactive tyrosine-protein kinase PRAG1 Human genes 0.000 claims abstract description 78
- 230000005540 biological transmission Effects 0.000 claims description 37
- 230000000153 supplemental effect Effects 0.000 claims description 22
- 230000000295 complement effect Effects 0.000 claims 1
- 239000013589 supplement Substances 0.000 abstract 4
- 238000010586 diagram Methods 0.000 description 11
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides a kind of back haul link HARQ method and system, methods described includes：RN is configured according to eNB supplement backhaul link subframe and indicated, the TB to be transmitted in the supplement backhaul link subframe establishes HARQ processes；According to the HARQ processes and the feedback form of setting, ACK/NACK feedbacks are carried out.Present invention also offers a kind of back haul link HARQ system, in the case where configuration supplements backhaul link subframe, HARQ processes are established for the supplement back haul link, realize the effective Feedback to back haul link information transfer, more flexible backhaul link resource configuration is provided, while ensure that the compatibility of system.
Description
Technical Field
The present invention relates to wireless communication technologies, and in particular, to a method and a system for hybrid automatic Repeat Request (HARQ) of a backhaul link.
Background
In a network with a Relay Node (RN), as shown in fig. 1, a Link between an evolved Node b (eNB) and a Macro User Equipment (M-UE) in the network is a Direct Link (Direct Link), a Link between the eNB and the RN is a Backhaul Link (Backhaul Link) or a Relay Link, which is also called a Un interface, a Link between the RN and a Relay User Equipment (R-UE) is an Access Link (Access Link), a cell served by the RN is called an R-cell, and a base station serving the Relay on the Backhaul Link is called a home base station denb (donor eNB) of the Relay.
When in-band relay (inband-relay) is used, that is, the backhaul link and the access link use the same frequency resource, the backhaul link and the access link cannot transmit or receive on the same frequency resource at the same time because the inband-relay transmitter may generate interference (self-interference) to its receiver. In a TDD system, this problem is solved by dividing the use of different uplink and downlink subframes in a time division manner between the backhaul link and the access link, namely: the network side configures uplink and downlink subframes for the backhaul link, which are also called Un UL/DL Sub-config, for the backhaul link, and the RN performs data transmission with the eNB without providing service data service for the R-UE on the uplink and downlink subframes configured for the backhaul link.
In the LTE system, one 10ms Radio frame (Radio frame) is composed of 10 subframes (subframes) of 1ms, as shown in fig. 2. In FIG. 2Representing a wireless frame;representing a subframe;representing Orthogonal Frequency Division Multiplexing (OFDM) symbols. The TDD system is configured with seven different uplink and downlink subframe configurations, also called TDD UL/dl config, to meet different network requirements, as shown in table 1:
TABLE 1
Where "D" denotes a downlink subframe, "U" denotes an uplink subframe, and "S" denotes a special subframe. The special subframe is divided into three parts in Time, including a Downlink Pilot Time Slot (DwPTS), a guard interval (GuardPeriod, GP), and an Uplink Pilot Time Slot (UpPTS); wherein, DwPTS is used for downlink information transmission, UpPTS is used for uplink information transmission, and GP is a guard time interval between uplink and downlink.
In the TDD system, since subframes #0, #1, #5, and #6 need to carry Broadcast information, synchronization signals, etc., they cannot be configured as a Multicast Broadcast Single Frequency Network (MBSFN subframe), that is: the available MBSFN subframe in a radio frame is at most six subframes — subframes #2, #3, #4, #7, #8, # 9. At present, a Un downlink subframe available in an LTE-a system is an R-cell MBSFN subframe, and a specific configuration mode of the Un subframe is as follows: the multimedia Control Entity (MBMS Control Entity, MCE) determines available MBSFN subframes first, the network side configures the available Un DL subframes in the available MBSFN subframes, and selects corresponding Un UL/DL subframe-configuration indication RN.
According to the subframe configuration of the LTE TDD system, corresponding Un UL/DL sub-Config under different TDD UL/DL configs is shown in table 2, where the mark "U" in the corresponding subframe position indicates configuration as Un UL subframe, the mark "D" indicates configuration as Un DL subframe, DL: UL ratio represents the configured Un DL/UL subframe ratio. And the network side adopts high-layer signaling configuration to indicate the specific TDD UL/DLConfig and Un UL/DL Sub-config used by the RN.
TABLE 2
In the LTE system, the signal needs to perform feedback and corresponding retransmission of the HARQ process in units of Transport Blocks (TBs). And after the receiving end receives the signal, generating ACK/NACK feedback according to the receiving and decoding conditions of the signal, if the signal is received correctly, generating ACK, and if the signal is not received correctly, generating NACK, and feeding the ACK/NACK signal back to the sending end. And the sending end carries out the next processing according to the received feedback information, if ACK is received, new data can be continuously transmitted, and if NACK is received, the data which fails to be received is retransmitted to the receiving end.
On the backhaul link of the TDD system, HARQ for data transmission between eNB and RN depends on the configured backhaul link subframes, and corresponds to the backhaul link subframe configuration shown in table 2 one-to-one, when RN is in n- κlWhen a subframe receives a Physical Downlink Shared Channel (PDSCH) transmission, an ACK/NACK is fed back to the eNB in an n subframe, wherein kappa isl∈ K, the values of K are shown in Table 3.
TABLE 3
At present, the configuration of the Un subframe in the system requires that the Un DL subframe must be a subframe in the MBSFN subframe set, and the corresponding UL subframe is used as the Un UL subframe, and the Un HARQ method depends on the Un subframe configuration determination. However, with the change of the data requirement of the backhaul link and other reasons, when more available backhaul link subframe configurations are set for the backhaul link, then correspondingly, the existing Un HARQ method is not well adapted to more flexible backhaul link resource configurations, and cannot effectively feed back the HARQ.
Disclosure of Invention
In view of this, the present invention is directed to a method and a system for backhaul link HARQ, which can implement effective feedback for HARQ.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a method of backhaul link HARQ, the method comprising:
the RN establishes an HARQ process for the TB transmitted on the supplementary backhaul link subframe according to the supplementary backhaul link subframe configuration of the eNB; the HARQ process of the supplementary backhaul link subframe is independent or unified with the HARQ process of the original backhaul link subframe;
and according to the HARQ process of the supplementary backhaul link subframe and the set feedback form, performing ACK/NACK feedback on a backhaul link uplink subframe.
Wherein the supplementary backhaul link subframe configuration comprises supplementary backhaul link uplink/downlink subframes;
when the configured subframe of the supplementary backhaul link is an in-band subframe, the downlink subframe of the supplementary backhaul link includes one or more subframes #0, #5, #6 and a DwPTS used for downlink information transmission in a special subframe;
and when the configured subframe of the supplementary backhaul link is an out-of-band subframe, the downlink subframe of the supplementary backhaul link comprises one or more of a downlink subframe in a radio frame and a DwPTS used for downlink information transmission in a special subframe.
Wherein the supplementary backhaul link subframe configuration comprises supplementary backhaul link uplink/downlink subframes;
and the supplementary backhaul link uplink subframe is determined according to the configured supplementary backhaul link downlink subframe and the latest feedback subframe principle.
Further, the establishing, by the RN, an HARQ process for the TB transmitted on the supplementary backhaul link subframe is: and the RN marks a process number for the HARQ process of the supplementary backhaul link subframe, wherein the process number is a process number indicated by the eNB.
Further, the HARQ process of the supplementary backhaul link subframe is independent of the HARQ process of the original backhaul link subframe, and the HARQ process number of the supplementary backhaul link subframe is numbered independently starting from 0, or numbering is continued on the basis of the available maximum process number of the original backhaul link subframe.
And determining the maximum process number of the supplementary backhaul link subframe according to the supplementary backhaul link subframe configuration.
Further, the HARQ process of the supplementary backhaul link subframe is unified with the HARQ process of the original backhaul link subframe, and the HARQ process number of the supplementary backhaul link subframe and the HARQ process of the original backhaul link subframe share the HARQ process numbers available to all backhaul link subframes.
And the maximum process number of all the return link subframes is determined by the original return link subframe configuration and the supplementary return link subframe configuration.
The maximum process number is determined by a maximum HARQ process number, and the maximum HARQ process number is a minimum HARQ process number that causes transmission of each HARQ process of the backhaul link to be non-overlapping in time.
Further, the performing, by the RN, ACK/NACK feedback on the backhaul link uplink subframe according to the HARQ process of the supplementary backhaul link subframe and the set feedback form is as follows:
and when the ACK/NACK feedback information of the HARQ process of the supplementary backhaul link subframe is set to be independently reported, the RN carries out ACK/NACK feedback on the supplementary backhaul link uplink subframe.
Further, the performing, by the RN, ACK/NACK feedback on the backhaul link uplink subframe according to the HARQ process of the supplementary backhaul link subframe and the set feedback form is as follows:
when the ACK/NACK feedback information of the HARQ process of the supplementary backhaul link subframe is set to be reported uniformly, the RN carries out ACK/NACK feedback on the backhaul link uplink subframe, and the backhaul link uplink subframe comprises the supplementary backhaul link uplink subframe and the original backhaul link uplink subframe.
The original backhaul link subframe refers to a backhaul link subframe used by the network side to configure subframe configuration TDD through a TDD subframe, and includes an original backhaul uplink/downlink subframe.
A system of backhaul link HARQ, the system comprising: an evolution base station eNB and a relay station RN; wherein,
the RN is used for establishing an HARQ process for the TB transmitted on the supplementary backhaul link subframe according to the supplementary backhaul link subframe configuration indication of the eNB; the HARQ process of the supplementary backhaul link subframe is independent or unified with the HARQ process of the original backhaul link subframe; and according to the HARQ process of the supplementary backhaul link and the set feedback form, performing ACK/NACK feedback on the uplink subframe of the backhaul link.
The RN is specifically configured to mark a process number for the HARQ process of the supplementary backhaul link subframe, where the process number is a process number indicated by the eNB.
When the HARQ process of the supplementary backhaul link subframe is independent of the HARQ process of the original backhaul link subframe, the process number of the HARQ process of the supplementary backhaul link subframe is numbered from 0 independently, or the numbering is continued on the basis of the available maximum process number of the original backhaul link subframe.
When the HARQ process of the supplementary backhaul link subframe is unified with the HARQ process of the original backhaul link subframe, the process number of the HARQ process of the supplementary backhaul link subframe and the HARQ process of the original backhaul link subframe share the process numbers of the available HARQ processes of all the backhaul link subframes.
The RN is specifically configured to perform ACK/NACK feedback on a supplementary backhaul link uplink subframe when ACK/NACK feedback information of an HARQ process of the supplementary backhaul link subframe is set to be reported independently.
The RN is specifically configured to perform ACK/NACK feedback on a backhaul link uplink subframe when ACK/NACK feedback information of a HARQ process of a supplementary backhaul link subframe is set to be reported in a unified manner, where the backhaul link uplink subframe includes the supplementary backhaul link uplink subframe and an original backhaul link uplink subframe.
The original backhaul link subframe refers to a backhaul link subframe used by the network side to configure subframe configuration TDD through a TDD subframe, and includes an original backhaul uplink/downlink subframe.
According to the invention, under the condition of configuring the supplementary backhaul link subframe, the HARQ process is established for the supplementary backhaul link, so that the effective feedback of backhaul link information transmission is realized, more flexible backhaul link resource configuration is provided, and the compatibility of the system is ensured.
Drawings
Fig. 1 is a schematic diagram of a network structure incorporating RNs;
FIG. 2 is a schematic diagram of a radio frame structure in an LTE system;
fig. 3 is a schematic flow chart of an implementation of a backhaul link HARQ method according to the present invention;
fig. 4 is a diagram illustrating a backhaul link HARQ method according to a first embodiment of the present invention;
fig. 5 is a diagram illustrating a backhaul link HARQ method according to a second embodiment of the present invention;
fig. 6 is a diagram illustrating a backhaul link HARQ method according to a third embodiment of the present invention;
fig. 7 is a diagram illustrating a backhaul link HARQ method according to a fourth embodiment of the present invention;
fig. 8 is a fifth embodiment of a backhaul link HARQ method according to the present invention.
Detailed Description
In the present invention, the network side may include one or more of the following entities: an eNB, an RN, a cell Coordination Entity (MCE), a Gateway (GW), a Mobility Management Entity (MME), an Evolved Universal Terrestrial Radio Access Network (EUTRAN), and an Operation Administration and Maintenance (OAM) manager.
First, the original backhaul link subframe and the supplementary backhaul link subframe are explained.
An eNB configures corresponding backhaul link subframes for an RN according to resource requirements of a backhaul link, including uplink/downlink subframes of the backhaul link, for uplink/downlink data transmission of the backhaul link, where a currently available TDD backhaul link subframe configuration in an LTE-a system is shown in table 2, and the RN obtains Un DL/UL subframe configuration according to subframe configuration TDD indicated by the eNB configuration, that is, Un subframe configuration, and performs transmission of backhaul link information with the eNB on the Un DL/UL subframe according to scheduling. For convenience of description, the backhaul link subframe configuration shown in table 2 is referred to as an original backhaul link subframe configuration in the present invention, and the subframe configuration shown in table 2 is total 19 fixed backhaul link subframe configurations [0-18 ].
And the RN receives the TB sent by the eNB on the configured Un DL subframe, establishes an HARQ process for the TB according to the HARQ process number indicated by the eNB, and feeds back the receiving state of the TB, namely ACK/NACK feedback, to the eNB on the corresponding Un UL subframe. The relationship between the Un DL subframe where the RN receives the TB and the Un UL subframe where the corresponding ACK/NACK information is fed back is shown in table 3, which corresponds one-to-one to the backhaul link subframe configuration shown in table 2, when the RN is in n- κlSubframe received PDSCH transmissionThe TB of (1), then feeding back ACK/NACK to the eNB in n subframes, wherein, kl∈K。
Due to the change of the backhaul link data requirement, the original backhaul link Subframe shown in table 2 may not meet the Un data requirement, and therefore, the eNB may further configure a supplementary backhaul link Subframe (Extra Un Subframe) for the RN for the Un data transmission. According to the frequency domain resource of the Extra Un Subframe, the Extra Un Subframe can be further divided into two categories: in-band/out-of-band supplemental backhaul link subframes, i.e., inband/outband and Extra Un subframes. Here, inbandExtra Un Subframe refers to backhaul Link transmission using the same frequency band resource as Access Link on the configured Extra Un Subframe; correspondingly, outband Extra Un Subframe refers to that the configured Extra Un Subframe uses a different frequency band resource from the Access Link for backhaul Link transmission.
The subframe configuration of the supplementary backhaul link includes supplementary backhaul link uplink/downlink subframes, and when the configured supplementary backhaul link subframes are in-band subframes, the downlink subframes of the supplementary backhaul link include subframes #0, #5, #6, (subframe #6 is an S subframe in tdd ul/DL Config indexes #0, #1, #2, #6, and is a downlink subframe in tdd ul/DL Config indexes #3, #4, # 5), and one or more DwPTS used for downlink information transmission in a special subframe; when the configured subframe of the supplementary backhaul link is an out-of-band subframe, the downlink subframe of the supplementary backhaul link comprises one or more of a downlink subframe in a wireless frame and a DwPTS used for downlink information transmission in a special subframe; here, the relationship between the downlink Subframe of the supplemental backhaul link and the corresponding uplink Subframe thereof may be determined according to a timing relationship between an uplink resource grant indication and uplink transmission, or a timing relationship between downlink transmission and uplink feedback, or an available UL Subframe having a minimum interval with an Un DL Subframe as a corresponding Un UL Subframe, or Un UL/DL subframes included in each of the Extra Un Subframe configurations may be defined in an Extra Un Subframe configuration table.
An example of a supplemental backhaul link subframe configuration table may be shown in table 4, where a subframe labeled D indicates a configuration as a Un DL subframe, a subframe labeled U indicates a configuration as a Un UL subframe, and a subframe labeled S indicates a configuration as a Un special subframe. When the subframe is configured as a Un S subframe, it indicates that a DwPTS portion in the subframe is used for backhaul downlink transmission and/or a UpPTS portion is used for backhaul uplink transmission, and when the subframe #6 is a DL subframe, a flag D indicates that the subframe is configured as a Un DL subframe, and when the subframe #6 is an S subframe, a flag S indicates that the subframe is configured as a Un special subframe.
TABLE 4
The basic idea of the invention is as follows: the RN establishes an HARQ process for the TB transmitted on the supplementary backhaul link subframe according to the supplementary backhaul link subframe configuration; and performing ACK/NACK feedback according to the HARQ process and the set feedback form.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings by way of examples.
Fig. 3 shows a flow of implementing the backhaul link HARQ method of the present invention, and as shown in fig. 3, the method includes the following steps:
step 301, the RN establishes an HARQ process for a TB transmitted on a supplementary backhaul link subframe according to the supplementary backhaul link subframe configuration of the eNB; the HARQ process of the supplementary backhaul link subframe is independent or unified with the HARQ process of the original backhaul link subframe;
specifically, in this step, the HARQ process established for the TB transmitted on the supplementary backhaul link subframe and the HARQ process established for the TB transmitted on the original backhaul link subframe may be independent from each other or may be unified.
When the HARQ process of the supplementary backhaul link subframe is independent from the HARQ process of the original backhaul link subframe, the eNB numbers the HARQ processes of the supplementary backhaul link subframe independently, and the specific numbering modes include two types:
1) the eNB numbers the HARQ processes of the supplementary backhaul link subframes independently from 0 to the maximum HARQ process number required under the supplementary backhaul link subframe configuration; under the configuration of the supplementary backhaul link, the maximum HARQ process number is determined by the specific subframe configuration of the supplementary backhaul link;
2) the eNB continues numbering the HARQ processes of the supplementary backhaul link subframes on the basis of the available maximum process number of the original backhaul link subframes, and indicates the HARQ process numbers corresponding to the RNs; for example, if the eNB configures the original backhaul link subframe configuration used by the RN, and the maximum HARQ process number is m, the HARQ process number of the supplementary backhaul link subframe starts from m +1 to the maximum HARQ process number required by the supplementary backhaul link subframe configuration.
When the HARQ process of the supplementary backhaul link subframe is unified with the HARQ process of the original backhaul link subframe, the HARQ process number of the supplementary backhaul link subframe and the HARQ process number of the original backhaul link subframe use the available HARQ process numbers of all the backhaul link subframes together, and the HARQ process of the supplementary backhaul link subframe and the HARQ process of the original backhaul link subframe are not distinguished. And the eNB indicates the HARQ process number corresponding to the TB transmitted in the supplementary backhaul link subframe and the TB transmitted in the original backhaul link subframe.
Here, since the supplementary backhaul link subframe is configured, the number of backhaul link subframes available to the RN is increased, and the number of HARQ processes available to the backhaul link may be changed. The maximum HARQ process number of the backhaul link is determined by the specific configuration of all the backhaul link subframes, i.e., the original backhaul link subframe and the supplementary backhaul link subframe. Here, it should be noted that the above-mentioned relationship between the HARQ process number and the HARQ process number is generally represented as [0, 1.,. t-1] for each HARQ process number when the maximum HARQ process number is t, that is, the maximum HARQ process number is t-1. The maximum number of HARQ processes is the minimum number of HARQ processes that can make the transmissions of the HARQ processes of the backhaul link non-overlapping in time.
Step 302, according to the HARQ process of the supplementary backhaul link subframe and the set feedback form, performing ACK/NACK feedback on the corresponding backhaul link uplink subframe;
specifically, in this step, for the HARQ process established by the TB transmitted on the supplementary backhaul link subframe, the RN needs to perform ACK/NACK feedback on the eNB on the corresponding backhaul link uplink subframe. Here, the feedback form includes an independent reporting form and a unified reporting form, and specifically, the independent reporting form means that ACK/NACK feedback of a supplementary backhaul link subframe HARQ process can be independently reported to an eNB; the unified reporting mode refers to that the HARQ process of the supplementary backhaul link subframe and the HARQ process of the original backhaul link subframe are subjected to ACK/NACK feedback unified reporting.
Specifically, when the configuration is that ACK/NACK feedback information of the HARQ process of the supplementary backhaul link subframe is independently reported, the RN performs ACK/NACK feedback on the supplementary backhaul link uplink subframe. Here, the transmitted ACK/NACK feedback information includes only ACK/NACK feedback information for the supplementary backhaul link subframe HARQ process.
And when the ACK/NACK feedback information of the HARQ process of the supplementary backhaul link subframe is set to be reported uniformly, the RN carries out ACK/NACK feedback on the backhaul link uplink subframe. Here, the backhaul link uplink subframe includes an uplink subframe in the supplementary backhaul link configuration and an uplink subframe in the original backhaul link configuration. And the RN reports the ACK/NACK feedback of the HARQ process to the eNB on the corresponding uplink subframe of the backhaul link, wherein the transmitted ACK/NACK feedback information comprises the ACK/NACK feedback information of the HARQ process of the supplementary backhaul link subframe and/or the ACK/NACK feedback information of the HARQ process of the original backhaul link subframe.
The RN performs ACK/NACK feedback of a backhaul link HARQ process to the eNB on a corresponding backhaul link uplink subframe, where the corresponding backhaul link uplink subframe is determined by specific backhaul link subframe configuration and HARQ timing relationship, and for the original backhaul link subframe configuration, a corresponding uplink subframe, that is, an uplink subframe where ACK/NACK is fed back, of a TB transmitted by each backhaul link downlink subframe is shown in table 3. For the example of the supplementary backhaul link shown in table 4, the HARQ timing relationship under the supplementary backhaul link subframe configuration may also be correspondingly given according to the principle of reusing the HARQ timing relationship of the LTE system or the principle of the latest feedback subframe, and specifically refer to the example shown in table 5.
TABLE 5
When the reporting mode is set to be an independent reporting mode and the ACK/NACK feedback of the supplementary backhaul link subframe HARQ process is reported, the RN feeds back ACK/NACK to the eNB on the corresponding supplementary backhaul link uplink subframe according to table 5 and the supplementary backhaul link subframe configuration used in the configuration. When a unified reporting mode is set, HARQ process ACK/NACK feedback of a supplementary backhaul link subframe and HARQ process ACK/NACK feedback of an original backhaul link subframe are reported in a unified mode, and a corresponding uplink subframe for feeding back ACK/NACK information is determined by specific backhaul link subframe configuration.
It should be understood that, regardless of the feedback mode set as independent reporting or unified reporting to process the HARQ process ACK/NACK feedback information of the supplemental backhaul link subframe, the RN may use Physical Uplink Control Channel (PUCCH) format 1a/1b/3/2a/2b to process the ACK/NACK feedback information and report the ACK/NACK feedback information to the eNB on the backhaul link Uplink subframe.
Fig. 4 shows a schematic diagram of a backhaul link HARQ method according to a first embodiment of the present invention, in this embodiment, an eNB configures a subframe configuration tdd index of an original backhaul link configured for an RN as subframe configuration tdd index 3, according to table 2, that is, subframes #4 and #9 are used as original Un DL subframes, and in fig. 4, subframe configuration tdd index is used as an original Un DL subframeRepresents; subframe #3 is the original Un UL subframe, used in FIG. 4And (4) showing. Referring to fig. 4, the eNB transmits one TB to the RN at subframe #4 and indicates a process number HARQ No of the HARQ process to be 0, and transmits one TB to the RN at subframe #9TB and indicated as HARQ No ═ 1.
With the change of the backhaul link data requirement, the eNB further configures a supplementary backhaul link subframe for the RN, which is described with reference to the supplementary backhaul link subframe configuration table shown in table 4 as an example, the eNB indicates that the Extra uplink subframe configuration tdd index configured by the RN is 4, that is, the configured subframe #6 is a supplementary Un special subframe, which is used in fig. 4Represents; subframe #2 is a supplemental Un UL subframe, used in FIG. 4Represents; wherein, the subframe #6 is a special subframe, which means that the DwPTS portion in the subframe #6 is used for backhaul downlink data transmission, and the UpPTS portion is used for backhaul uplink data transmission.
In this embodiment, the HARQ process of the supplementary backhaul link subframe is independent from the HARQ process of the original backhaul link subframe, and numbering is performed on the HARQ process of the supplementary backhaul link subframe in a manner of continuing numbering on the basis of the available maximum HARQ process number of the original backhaul link subframe, so that the eNB transmits a TB for the RN on subframe #6, and indicates that the HARQ No is 2. And the RN establishes an HARQ process for the TB transmitted on the supplementary backhaul link subframe #6 according to the configuration indication of the eNB and marks the process number as HARQNo-2.
Fig. 5 shows a schematic diagram of a backhaul link HARQ method according to a second embodiment of the present invention, in this embodiment, an eNB configures an original backhaul link subframe configuration as a subframe configuration tdd index of 7 for an RN, and according to table 2, uses subframes #4 and #8 as original Un DL subframes, and uses subframe #5 and subframe #8 in fig. 5Represents; subframe #2 is the original Un UL subframe, used in FIG. 5And (4) showing. Referring to fig. 5, eNB transmits one TB to RN in subframe #4 and indicates HARQ No is 0, one TB is transmitted to RN in subframe #8, and indicated as HARQ No 1.
With the change of the backhaul link data requirement, the eNB further configures a supplementary backhaul link subframe for the RN, which is described with reference to the supplementary backhaul link subframe configuration table shown in table 4 as an example, the eNB indicates that the Extra uplink subframe configuration tdd index configured by the RN is 10, that is, the configured subframe #1, #6 is a supplementary Un special subframe, and is used in fig. 5Represents; subframe #7 is a supplemental Un UL subframe, used in FIG. 5Represents; wherein, the subframes #1, #6 are special subframes, which means that DwPTS portions on the subframes #1, #6 are used for backhaul downlink data transmission, and UpPTS portions are used for backhaul uplink data transmission.
In this embodiment, the supplemental backhaul link subframe HARQ process is independent from the HARQ process of the original backhaul link subframe, and the HARQ process for the supplemental backhaul link subframe is renumbered independently from 0, where for the sake of distinction, the process number of the supplemental backhaul link subframe HARQ process is denoted as Extra HARQ No, and then the eNB transmits one TB for RN on subframe #1, and indicates that the Extra HARQ No is 0, and transmits one TB for RN on subframe #6, and indicates that the Extra HARQ No is 1. The RN establishes HARQ processes for TBs transmitted on the supplementary backhaul link subframe #1 and subframe #6 according to the configuration instruction of the eNB, and marks the process numbers as Extra HARQ No ═ 0 and Extra HARQ No ═ 1, respectively.
Fig. 6 shows a schematic diagram of a backhaul link HARQ method according to a third embodiment of the present invention, in this embodiment, an eNB configures an original backhaul link subframe configuration as a subframe configuration tdd index of 18 for an RN, and according to table 2, that is, uses subframe #9 as an original Un DL subframe, and in fig. 6, uses subframe #9 as an original Un DL subframeRepresents; subframe #4 is the original Un UL subframe, used in FIG. 6And (4) showing. Referring to fig. 6, the eNB transmits one TB to the RN in subframe #9 and indicates HARQ No ═ 0.
With the change of the backhaul link data requirement, the eNB further configures a supplementary backhaul link subframe for the RN, which is described with reference to the supplementary backhaul link subframe configuration table shown in table 4 as an example, the eNB indicates that the Extra ul subframe configuration tdd index configured by the RN is 22, that is, the configured subframe #1 is a supplementary Un special subframe, which is used in fig. 6Represents; subframe #8 is a supplemental Un UL subframe, used in FIG. 6Represents; wherein, the subframe #1 is a special subframe, which means that the DwPTS portion on the subframe #1 is used for backhaul downlink data transmission, and the UpPTS portion is used for backhaul uplink data transmission.
In this embodiment, the supplementary backhaul link subframe HARQ process is unified with the original backhaul link subframe HARQ process, and it can be determined that the maximum number of backhaul link HARQ processes is 2 according to the original backhaul link subframe configuration and the supplementary backhaul link subframe configuration, then the eNB transmits one TB for the RN on subframe #1, and indicates that HARQ No is 1, and then the RN establishes HARQ processes for the TBs transmitted on subframe #1 and subframe #9 according to the configuration indication of the eNB, and marks the process numbers as HARQ No 1 and HARQ No 0, respectively.
Fig. 7 shows a schematic diagram of a backhaul link HARQ method according to a fourth embodiment of the present invention, in this embodiment, an eNB configures an original backhaul link subframe configuration with subframe configuration tdd index of 3 for an RN, and according to table 2, uses subframes #4 and #9 as original Un DL subframes, and uses subframe #7 and subframe #9 in fig. 7Represents; subframe #3 is the original Un UL subframe, used in FIG. 7And (4) showing. Referring to fig. 7, eNB transmits one TB to RN in subframes #4 and #9, respectively, and according to table 3, RN should feed back ACK/NACK information of TB transmitted in subframes #4 and #9 to eNB in subframe # 3.
With the change of the backhaul link data requirement, the eNB further configures a supplementary backhaul link subframe for the RN, which is described with reference to the supplementary backhaul link subframe configuration table shown in table 4 as an example, the eNB indicates that the Extra uplink subframe configuration tdd index configured by the RN is 4, that is, the configured subframe #6 is a supplementary Un special subframe, which is used in fig. 7Represents; subframe #2 is a supplemental Un UL subframe, used in FIG. 7And (4) showing.
In this embodiment, when the HARQ process ACK/NACK feedback form of the supplementary backhaul link subframe is an independent reporting form, according to the HARQ timing relationship shown in table 5, the RN performs feedback reporting on the supplementary backhaul link uplink subframe #2 with respect to the ACK/NACK feedback information of the TB transmitted by the eNB on the supplementary backhaul link subframe # 6. Specifically, referring to fig. 7, the RN processes and carries the ACK/NACK information for the TB transmitted in the original backhaul link subframes #4 and #9 in PUCCH format1b and feeds back the ACK/NACK information to the eNB in subframe #3, and the RN processes and carries the ACK/NACK information for the TB transmitted in the supplementary backhaul link subframe #6 in PUCCH format1a and feeds back the ACK/NACK information to the eNB in subframe # 2.
Fig. 8 shows a schematic diagram of a fifth embodiment of a backhaul link HARQ method of the present invention, in this embodiment, an eNB configures an original backhaul link subframe configuration as a subframe configuration tdd index of 18 for an RN, according to table 2, that is, uses subframe #9 as an original Un DL subframe, and uses subframe #9 in fig. 8Represents; subframe #4 is the original Un UL subframe, used in FIG. 8And (4) showing. Referring to fig. 8, eNB transmits one TB to RN at subframe #9, and according to table 3, RN should feedback ACK/NACK information of TB transmitted at subframe #9 to eNB at subframe # 4.
With the change of the backhaul link data requirement, the eNB further configures a supplementary backhaul link subframe for the RN, which is described with reference to the supplementary backhaul link subframe configuration table shown in table 4 as an example, the eNB indicates that the Extra uplink subframe configuration tdd index configured by the RN is 24, that is, the configured subframe #1, #6 is a supplementary Un special subframe, and is used in fig. 8Represents; subframe #7 is a supplemental Un UL subframe, used in FIG. 8And (4) showing.
In this embodiment, when the ACK/NACK feedback form of the supplementary backhaul link subframe HARQ process is a unified processing form, the eNB performs TB transmission to the RN according to the backhaul link subframe configuration on subframes #1, #6, and #9, respectively, and the backhaul link uplink subframe includes subframes #4 and #7, then according to the principle of the latest feedback subframe, the RN processes the ACK/NACK feedback information of the TB transmitted by subframes #6 and #9 with PUCCH format1b, carries the ACK/NACK feedback information to the eNB on subframe #4, processes the ACK/NACK feedback information of the TB transmitted by subframe #1 with PUCCH format1a, and carries the ACK/NACK feedback information to the eNB on subframe # 7. Specifically, referring to fig. 8, the ACK/NACK information fed back on subframe #4 includes feedback information of the HARQ process of the original backhaul link subframe #9 and feedback information of the HARQ process of the supplementary backhaul link subframe #6, and the ACK/NACK information fed back on subframe #7 includes only feedback information of the HARQ process of the supplementary backhaul link subframe # 1.
The invention also provides a system of backhaul link HARQ, the system comprises: eNB and RN; wherein,
the RN is used for establishing an HARQ process for the TB transmitted on the supplementary backhaul link subframe according to the supplementary backhaul link subframe configuration indication of the eNB; the HARQ process of the supplementary backhaul link subframe is independent or unified with the HARQ process of the original backhaul link subframe; and according to the HARQ process of the supplementary backhaul link and the set feedback form, performing ACK/NACK feedback on the uplink subframe of the backhaul link.
Here, the supplementary backhaul link subframe configuration includes supplementary backhaul link uplink/downlink subframes, and when the configured supplementary backhaul link subframes are in-band subframes, the supplementary backhaul link downlink subframes include one or more of subframes #0, #5, #6, and DwPTS for downlink information transmission in a special subframe;
when the configured subframe of the supplementary backhaul link is an out-of-band subframe, the downlink subframe of the supplementary backhaul link comprises one or more of a downlink subframe in a wireless frame and a DwPTS used for downlink information transmission in a special subframe;
and the supplementary backhaul link uplink subframe is determined according to the configured supplementary backhaul link downlink subframe and the latest feedback subframe principle.
Further, the RN is specifically configured to mark a process number for the HARQ process of the supplementary backhaul link subframe, where the process number is a process number indicated by the eNB;
when the HARQ process of the supplementary backhaul link subframe is independent of the HARQ process of the original backhaul link subframe, the process number of the HARQ process of the supplementary backhaul link subframe is numbered independently from 0, or the HARQ process of the supplementary backhaul link subframe is numbered continuously on the basis of the available maximum process number of the original backhaul link subframe; the available maximum process number of the original backhaul link subframe is unchanged, and the maximum process number of the supplementary backhaul link subframe is determined by supplementary backhaul link subframe configuration.
Further, when the HARQ process of the supplementary backhaul link subframe is unified with the HARQ process of the original backhaul link subframe, the process number of the HARQ process of the supplementary backhaul link subframe and the HARQ process of the original backhaul link subframe share the process numbers of the HARQ processes available to all backhaul link subframes according to the instruction of the eNB; and the maximum process number of all the return link subframes is determined by the original return link subframe configuration and the supplementary return link subframe configuration.
The maximum process number of the subframe of the backhaul link is determined by the maximum HARQ process number, and the maximum HARQ process number is the minimum HARQ process number which enables the transmission of all HARQ processes of the backhaul link not to overlap in time.
Further, the RN is specifically configured to perform ACK/NACK feedback on a supplemental backhaul link uplink subframe when ACK/NACK feedback information of an HARQ process of the supplemental backhaul link subframe is set to be reported independently.
Further, the RN is specifically configured to perform ACK/NACK feedback on a backhaul link uplink subframe when ACK/NACK feedback information of an HARQ process of a supplementary backhaul link subframe is set to be uniformly reported, where the backhaul link uplink subframe includes the supplementary backhaul link uplink subframe and an original backhaul link uplink subframe;
the original backhaul link subframe refers to a backhaul link subframe used by the network side to configure subframe configuration TDD through a TDD subframe, and includes an original backhaul uplink/downlink subframe.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (18)
1. A method of backhaul link hybrid automatic repeat request (HARQ), the method comprising:
the relay node RN establishes an HARQ process for a transmission block TB transmitted on a supplementary backhaul link subframe according to the supplementary backhaul link subframe configuration of the eNB; the HARQ process of the supplementary backhaul link subframe is independent or unified with the HARQ process of the original backhaul link subframe;
according to the HARQ process of the supplementary backhaul link subframe and the set feedback form, performing ACK/NACK feedback on a backhaul link uplink subframe;
the supplementary backhaul link subframe configuration comprises supplementary backhaul link uplink/downlink subframes;
when the configured subframe of the supplementary backhaul link is an in-band subframe, the downlink subframe of the supplementary backhaul link at least includes any one of the following items: DwPTS used for downlink information transmission in subframe #0, subframe #5, subframe #6 and special subframe;
when the configured subframe of the supplementary backhaul link is an out-of-band subframe, the downlink subframe of the supplementary backhaul link at least includes any one of the following items: and DwPTS used for downlink information transmission in a downlink subframe and a special subframe in a radio frame.
2. The method of claim 1, wherein the supplemental backhaul uplink subframe is determined according to a configured supplemental backhaul downlink subframe and a latest feedbackable subframe principle.
3. The method of claim 1, wherein the establishing, by the RN, an HARQ process for the TBs transmitted on the supplemental backhaul link subframe is: and the RN marks a process number for the HARQ process of the supplementary backhaul link subframe, wherein the process number is a process number indicated by the eNB.
4. The method as claimed in claim 1, wherein the HARQ process of the supplementary backhaul link subframe is independent of the HARQ process of the original backhaul link subframe, and the HARQ process number of the supplementary backhaul link subframe is numbered independently starting from 0, or numbering is continued on the basis of the available maximum process number of the original backhaul link subframe.
5. The method of claim 4, wherein a maximum process number of the supplemental backhaul link subframe is determined by a supplemental backhaul link subframe configuration.
6. The method as claimed in claim 1, wherein the HARQ process of the supplementary backhaul link sub-frame is unified with the HARQ process of the original backhaul link sub-frame, and the HARQ process number of the supplementary backhaul link sub-frame and the HARQ process of the original backhaul link sub-frame share the HARQ process numbers available for all backhaul link sub-frames.
7. The method of claim 6, wherein the maximum process number of all backhaul link subframes is determined by an original backhaul link subframe configuration and a complementary backhaul link subframe configuration.
8. The method as claimed in claim 4, 5 or 7, wherein the maximum number of processes is determined by the maximum number of HARQ processes, which is the minimum number of HARQ processes that make the transmissions of the HARQ processes of the backhaul link non-overlapping in time.
9. The method of claim 1, wherein the feedback of ACK/NACK by the RN on the backhaul uplink subframe according to the HARQ process of the supplementary backhaul subframe and the set feedback form is as follows:
and when the ACK/NACK feedback information of the HARQ process of the supplementary backhaul link subframe is set to be independently reported, the RN carries out ACK/NACK feedback on the supplementary backhaul link uplink subframe.
10. The method of claim 1, wherein the feedback of ACK/NACK by the RN on the backhaul uplink subframe according to the HARQ process of the supplementary backhaul subframe and the set feedback form is as follows:
when the ACK/NACK feedback information of the HARQ process of the supplementary backhaul link subframe is set to be reported uniformly, the RN carries out ACK/NACK feedback on the backhaul link uplink subframe, and the backhaul link uplink subframe comprises the supplementary backhaul link uplink subframe and the original backhaul link uplink subframe.
11. The method of claim 4, 6, 7 or 10, wherein the original backhaul link subframe refers to a backhaul link subframe used by the network side to indicate the RN by means of TDD subframe configuration, and includes an original backhaul link uplink/downlink subframe.
12. A system of backhaul link HARQ, the system comprising: an evolution base station eNB and a relay station RN; wherein,
the RN is used for establishing an HARQ process for the TB transmitted on the supplementary backhaul link subframe according to the supplementary backhaul link subframe configuration indication of the eNB; the HARQ process of the supplementary backhaul link subframe is independent or unified with the HARQ process of the original backhaul link subframe; according to the HARQ process of the supplementary backhaul link and the set feedback form, performing ACK/NACK feedback on the uplink subframe of the backhaul link;
the supplementary backhaul link subframe configuration comprises supplementary backhaul link uplink/downlink subframes;
when the configured subframe of the supplementary backhaul link is an in-band subframe, the downlink subframe of the supplementary backhaul link at least includes any one of the following items: DwPTS used for downlink information transmission in subframe #0, subframe #5, subframe #6 and special subframe;
when the configured subframe of the supplementary backhaul link is an out-of-band subframe, the downlink subframe of the supplementary backhaul link at least includes any one of the following items: and DwPTS used for downlink information transmission in a downlink subframe and a special subframe in a radio frame.
13. The system according to claim 12, wherein the RN is specifically configured to mark a process number for the HARQ process of the supplemental backhaul link subframe, where the process number is a process number indicated by the eNB.
14. The system of claim 12, wherein when the HARQ process of the supplementary backhaul link subframe is independent from the HARQ process of the original backhaul link subframe, the process number of the HARQ process of the supplementary backhaul link subframe is numbered independently starting from 0, or the numbering is continued based on the available maximum process number of the original backhaul link subframe.
15. The system of claim 12, wherein when the HARQ process of the supplementary backhaul link subframe is unified with the HARQ process of the original backhaul link subframe, the process number of the HARQ process of the supplementary backhaul link subframe and the HARQ process of the original backhaul link subframe share the process numbers of the HARQ processes available for all backhaul link subframes.
16. The system of claim 12, wherein the RN is specifically configured to perform ACK/NACK feedback on a supplemental backhaul link uplink subframe when ACK/NACK feedback information of a HARQ process of the supplemental backhaul link subframe is configured to be reported independently.
17. The system according to claim 12, wherein the RN is specifically configured to perform ACK/NACK feedback on a backhaul link uplink subframe when ACK/NACK feedback information of a HARQ process of a supplementary backhaul link subframe is set to be uniformly reported, where the backhaul link uplink subframe includes the supplementary backhaul link uplink subframe and an original backhaul link uplink subframe.
18. The system according to claim 14, 15 or 17, wherein the original backhaul link subframe refers to a backhaul link subframe used by the network side to indicate the RN by means of TDD subframe configuration, and includes an original backhaul link uplink/downlink subframe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110205670.3A CN102891743B (en) | 2011-07-21 | 2011-07-21 | A kind of method and system of back haul link hybrid automatic repeat-request |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110205670.3A CN102891743B (en) | 2011-07-21 | 2011-07-21 | A kind of method and system of back haul link hybrid automatic repeat-request |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102891743A CN102891743A (en) | 2013-01-23 |
| CN102891743B true CN102891743B (en) | 2017-12-26 |
Family
ID=47535122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110205670.3A Active CN102891743B (en) | 2011-07-21 | 2011-07-21 | A kind of method and system of back haul link hybrid automatic repeat-request |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102891743B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114342295B (en) * | 2019-09-12 | 2024-06-07 | 联想(北京)有限公司 | Scheduling enhancements for EMTC |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101925110A (en) * | 2009-06-16 | 2010-12-22 | 中兴通讯股份有限公司 | Method, relay station and base station for transmitting uplink feedback information of relay link |
| CN102075235A (en) * | 2010-11-26 | 2011-05-25 | 中兴通讯股份有限公司 | Method and system for switching return link subframe configurations in time division duplex (TDD) system |
-
2011
- 2011-07-21 CN CN201110205670.3A patent/CN102891743B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101925110A (en) * | 2009-06-16 | 2010-12-22 | 中兴通讯股份有限公司 | Method, relay station and base station for transmitting uplink feedback information of relay link |
| CN102075235A (en) * | 2010-11-26 | 2011-05-25 | 中兴通讯股份有限公司 | Method and system for switching return link subframe configurations in time division duplex (TDD) system |
Non-Patent Citations (1)
| Title |
|---|
| LS on intra-eNB energy saving solutions;3GPP;《3GPP TSG RAN WG1 Meeting #62》;20100702;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102891743A (en) | 2013-01-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101539775B1 (en) | Method for relaying data in wireless communication system based on tdd | |
| US8472357B2 (en) | System, methods, and apparatus for bidirectional relaying in wireless communications systems | |
| CN102113398B (en) | Resource allocation method for backhaul link and access link in wireless communication system including relay | |
| EP2378675B1 (en) | Signal transmission method using mbsfn subframe in radio communication system | |
| EP2524451B1 (en) | Apparatus and method for relay switching time | |
| CN102480347B (en) | Feedback method and device of confirmation information during trunk line subframe configuration switching | |
| KR101335971B1 (en) | Wireless relay method and device | |
| CN101908955A (en) | Downlink information transmission method and device of return link | |
| CN101814944B (en) | Data transmission method, system and device | |
| CN101888661B (en) | Wireless communication method, system and device | |
| CN102437904B (en) | Time division duplex system and downstream feedback method of repeated link thereof | |
| CN101931960A (en) | Method for avoid uplink transmission conflict, system and device | |
| CN102571189B (en) | The data processing method that backhaul link subframe configuration switches and device | |
| CN105577333B (en) | A kind of method of determining sequential relationship of hybrid-automatic repeat request of relay link | |
| CN102891743B (en) | A kind of method and system of back haul link hybrid automatic repeat-request | |
| CN103138897A (en) | Acknowledgement information feedback method and system | |
| WO2012152176A1 (en) | Method and system for configuring newly added backhaul subframe | |
| CN101883387A (en) | Wireless communication method and device | |
| CN103138827B (en) | Relay transmission method and device | |
| CN102036383A (en) | Method and system for transmitting downlink data | |
| CN101888701B (en) | Method for avoiding uplink interference | |
| CN102891715B (en) | A kind of processing method and system of backhaul link subframe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201224 Address after: 224000 room 1306, yanchuang building, Yandu District, Yancheng City, Jiangsu Province (d) Patentee after: Yancheng Hengyuan Investment Development Co.,Ltd. Address before: 518057 Ministry of justice, Zhongxing building, South Science and technology road, Nanshan District hi tech Industrial Park, Shenzhen, Guangdong Patentee before: ZTE Corp. |
|
| TR01 | Transfer of patent right |