CN105577333B

CN105577333B - A kind of method of determining sequential relationship of hybrid-automatic repeat request of relay link

Info

Publication number: CN105577333B
Application number: CN201610064505.3A
Authority: CN
Inventors: 张光辉; 孙程君
Original assignee: Beijing Samsung Telecommunications Technology Research Co Ltd; Samsung Electronics Co Ltd
Current assignee: Beijing Samsung Telecommunications Technology Research Co Ltd; Samsung Electronics Co Ltd
Priority date: 2010-04-30
Filing date: 2010-04-30
Publication date: 2019-01-11
Anticipated expiration: 2030-04-30
Also published as: CN105577333A; CN102237990A

Abstract

The present invention provides the method for determining sequential relationship of hybrid-automatic repeat request of relay link, one of method is the following steps are included: A, trunking receive assigned uplink relay subframe and downlink relay sub-frame；B, trunking determine HARQ sequential relationship using the uplink relay subframe and downlink relay sub-frame.Using the present invention, the HARQ sequential relationship of determining trunking can be realized, and reduce the influence to HARQ sequential relationship between trunking and user equipment.

Description

Method for determining HARQ (hybrid automatic repeat request) timing relationship of relay link

Technical Field

The invention relates to a wireless communication technology, in particular to a method for determining a hybrid automatic repeat request (HARQ) time sequence relation of a relay link.

Background

The LTE/LTE-A has a 2-class frame structure, and is respectively suitable for FDD and TDD. For FDD, each frame is 10ms in length and contains 10 subframes, respectively labeled as subframes 0 through 9, each subframe being 1 ms. For TDD, each frame is also 10ms long and includes 10 subframes, which are respectively labeled as subframes 0 to 9, and each subframe is 1ms and includes an uplink subframe, a downlink subframe, and a special subframe. For different uplink and downlink service requirements, TDD has a total of 7 configurations, which is specifically shown in table 1:

TABLE 1

In table 1, D represents a downlink subframe, U represents an uplink subframe, and S represents a special subframe.

In LTE/LTE-a, downlink transmission refers to signal transmission from a base station (eNB) to a User Equipment (UE), and in this case, the signal is denoted as a downlink signal, and specifically includes a downlink data signal, a control signal, and a reference signal (also referred to as a pilot). The downlink data signal is transmitted in a Physical Downlink Shared Channel (PDSCH). Uplink transmission refers to transmission of signals from the UE to the base station, and in this case, the signals may be referred to as uplink signals, specifically including uplink data signals, control signals, and reference signals (also referred to as pilot signals). Wherein the uplink data signal is transmitted in a Physical Uplink Shared Channel (PUSCH). The uplink control signal includes an ACK/ACK signal (HARQ-ACK) for HARQ transmission of the PDSCH, a Channel Quality Indication (CQI) signal, and a Scheduling Request Indication (SRI) signal. Note that if there is no uplink data signal, the uplink control signal is transmitted in a Physical Uplink Control Channel (PUCCH).

Generally, the downlink control signal may be transmitted by broadcasting or transmitted to a specific user equipment. Wherein the broadcast transmission is transmitted to all user equipments through, for example, a Broadcast Channel (BCH) or a Physical Control Format Indicator Channel (PCFICH). For the downlink control signal sent to a specific user equipment, the downlink control signal provides a downlink scheduling allocation signaling for scheduling the transmission of the PDSCH and an uplink scheduling allocation signaling for scheduling the transmission of the PUSCH, which are collectively called as a Physical Downlink Control Channel (PDCCH); or ACK/NACK information providing HARQ transmission of PUSCH, is referred to as a Physical HARQ Indicator Channel (PHICH).

When performing data transmission based on HARQ, the data receiving side correspondingly transmits ACK or NACK feedback information according to whether data is correctly received. Here, scheduling of data transmission is performed through PDCCH, wherein ACK/NACK feedback signal for HARQ transmission of PDSCH is transmitted on PUCCH HARQ-ACK channel and ACK/NACK feedback signal for HARQ transmission of PUSCH is transmitted on PHICH channel.

In general, HARQ has a processing delay, that is, after receiving PDSCH, UE shall delay to send corresponding ACK/NACK information for a certain time, and also shall delay to send PUSCH for a certain time after receiving uplink data scheduling sent to it by eNB, and accordingly, after receiving PUSCH, eNB shall delay to send ACK/NACK information for UE for a certain time. Therefore, the transmission of HARQ requires a certain timing relationship, and the specific HARQ timing includes: timing between uplink data scheduling (UL grant) and PUSCH, timing between PUSCH and its corresponding ACK/NACK, and timing between PDSCH and its corresponding ACK/NACK.

The HARQ timing relationship in the current LTE is:

(1) and the UE detects the UL grant sent to the UE in the subframe n, and transmits the corresponding PUSCH in the subframe n + K. For FDD, K ═ 4, for TDD, specific K values are shown in table 2;

TABLE 2

(2) If the eNB receives the PUSCH in the subframe n, the corresponding ACK/NACK information is sent in the PHICH channel of the subframe n + K. For FDD, K ═ 4, for TDD, specific K values are shown in table 3;

TABLE 3

(3) The UE receives the PDSCH in subframe n-K and sends a corresponding ACK/NACK in subframe n. For FDD, K is 4 and for TDD, the specific K values are shown in table 4.

TABLE 4

By this, the description of the current HARQ timing is completed.

In LTE-a, relaying (Relay) is one of the key technologies, which can increase network capacity and improve cell edge coverage. The Relay is used for recoding and modulating a signal received from the base station and then transmitting the signal to the UE, and simultaneously, recoding and modulating the signal received from the UE and transmitting the signal to the base station, thereby improving the capacity or the coverage. Typically, a Relay contains type 2 links, one is a Relay link, and one is an access link. The Relay link is a link between the base station and the Relay, and the access link is a link between the Relay and the UE. Here, the relay link, like the access link, is also uplink and downlink, and a downlink shared physical channel transmitted on the relay link is generally defined as a relay downlink shared physical channel (R-PDSCH), and an uplink shared physical channel transmitted on the relay link is generally defined as a relay uplink shared physical channel (R-PUSCH). Currently, LTE-a has agreed about Relay, and in order to avoid interference between the Relay link and the access link, the Relay link and the access link use time division multiplexing, that is, in one frame, some subframes are used as Relay link subframes, and some subframes are used as access link subframes. The base station should allocate some subframes within a certain period, which may be 10ms, as relay subframes. Here, the base station has two ways to notify the Relay link subframe to the Relay, one is an explicit way, and the other is an implicit way. In the explicit mode, the base station may notify all the uplink Relay link subframes and the downlink Relay link subframes to the Relay in a signaling mode; in the implicit notification mode, the base station only notifies the Relay of the downlink Relay link subframe, and the Relay determines the uplink Relay link subframe through the HARQ timing relation. For which notification scheme to use, the current 3GPP has agreed to use the LTE-a TDD, i.e. explicit notification scheme, but for FDD, it is still under discussion and has not agreed.

The current HARQ timing relationship is also called LTE Rel-8 (R8: Release 8) timing relationship, which is accessed to the link, and the HARQ timing relationship of the introduced Relay link corresponding to the Relay is not determined at present. And, if the relay link HARQ adopts the current LTE Rel-8 timing relationship, this will cause the efficiency of both the relay link and the access link to be low for the TDD system.

Disclosure of Invention

The invention provides a method for determining the HARQ time sequence relation of a relay link, which is used for determining the HARQ time sequence relation of relay equipment and reducing the influence on the HARQ time sequence relation between the relay equipment and user equipment.

The technical scheme provided by the invention comprises the following steps:

a method for determining a hybrid automatic repeat request (HARQ) timing relationship of a relay link comprises the following steps:

a, the relay equipment receives the distributed uplink relay subframe and downlink relay subframe;

and B, the relay equipment determines the HARQ time sequence relation by utilizing the uplink relay subframe and the downlink relay subframe.

a, a relay device receives an uplink relay subframe and a downlink relay subframe which are distributed;

b, the relay equipment receives Radio Resource Control (RRC) signaling; the RRC signaling carries an HARQ time sequence relation;

and C, the relay equipment determines the HARQ time sequence relation by utilizing the uplink relay subframe and the downlink relay subframe.

According to the technical scheme, the HARQ time sequence relation of the relay equipment can be determined through one of the two methods, and the influence on the HARQ time sequence relation between the relay equipment and the user equipment is reduced.

Drawings

FIG. 1 is a basic flow diagram provided by an embodiment of the present invention;

FIG. 2 is another flow chart provided by an embodiment of the present invention;

fig. 3 is a schematic diagram of HARQ timing relationship of TDD uplink and downlink configuration 2;

fig. 4 is a schematic diagram of HARQ timing relationship of TDD uplink and downlink configuration 3.

Detailed Description

The method provided by the invention is mainly directed to a 3GPP LTE-A (Long term evolution-advanced) system, and as an extension of the method, the method can also be popularized to other systems adopting Relay. In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, fig. 1 is a basic flow chart provided by an embodiment of the present invention. As shown in fig. 1, the process may include the following steps:

step 101, the relay device receives the allocated uplink relay subframe and downlink relay subframe.

Here, in step 101, the Donor base station (Donor eNB) allocates an uplink relay subframe and a downlink relay subframe to the relay apparatus. And then, the donor base station notifies the allocated uplink and downlink relay subframes to the relay equipment. Here, the method for the donor base station to notify the relay device may have various implementation manners in specific implementation, for example, the donor base station notifies the backhaul configuration number to the relay device by using Radio Resource Control (RRC) signaling, so that the relay device searches the configuration corresponding to the backhaul configuration number, i.e., the uplink and downlink relay subframes, in the configuration table after receiving the backhaul configuration number; or the donor base station uses the RRC signaling to notify the relay device in a bit mapping manner, since each frame includes 10 subframes, here, a 10-bit form may be adopted, and if a bit value is 1, it indicates that the subframe corresponding to the bit is a relay subframe, that is, if the subframe corresponding to the bit is an uplink subframe, the subframe may be an uplink relay subframe; similarly, if the subframe corresponding to the bit is a downlink subframe, the subframe may be used as a downlink relay subframe. If the value of the bit is 0, it indicates that the subframe cannot be a relay subframe.

Thus, through the above description, the relay device can easily know the uplink and downlink relay subframes to which the relay device is allocated. A method for determining a relay subframe by the donor base station is described below.

Generally, in the TDD system, subframes 0, 1, 5, and 6 in each frame are fixed for transmitting synchronization or broadcast information, and based on this, the downlink relay subframe known in step 101 in this application does not include subframes 0, 1, 5, and 6.

The relay device is in a half-duplex working mode, that is, when the relay device transmits relay data to the base station in an uplink relay subframe, the relay device cannot receive any data transmitted by the terminal in the uplink relay subframe. That is, if a certain uplink subframe is configured as an uplink relay subframe, the ACK/NACK transmitted by the terminal in the uplink relay subframe cannot be successfully received by the relay device, and thus, the PDSCH transmitted by the ACK/NACK transmitted by the subframe according to the downlink subframe corresponding to the LTE Rel-8 harq timing relationship cannot be successfully transmitted due to the fact that no ACK/NACK feedback is obtained.

Based on this, in this step 101, the donor base station may determine the uplink relay subframe and the downlink relay subframe for the relay device according to the following principles:

(1) according to the timing relation between LTE Rel-8 PDSCH and ACK/NACK, if all downlink subframes corresponding to an uplink subframe are at least one of subframes 0, 1, 5 and 6, the uplink subframe is not configured as an uplink relay subframe.

(2) According to the timing relationship between the LTE Rel-8 PDSCH and the ACK/NACK, if more than half of all downlink subframes corresponding to an uplink subframe are at least one of subframes 0, 1, 5 or 6, the uplink subframe is not configured as an uplink relay subframe.

(3) According to the timing relationship between the LTE Rel-8 PDSCH and the ACK/NACK, if the non-majority of all downlink subframes corresponding to the uplink subframe are at least one of subframes 0, 1, 5, and 6, the uplink subframe may be configured as an uplink relay subframe, and correspondingly, downlink subframes other than subframes 0, 1, 5, and 6 in the downlink subframe corresponding to the uplink subframe may be configured as downlink relay subframes.

(4) According to the timing relationship between the LTE Rel-8 PDSCH and ACK/NACK, if all downlink subframes corresponding to an uplink subframe do not include subframes 0, 1, 5, or 6, the uplink subframe may be configured as an uplink relay subframe, and correspondingly, a downlink subframe corresponding to the uplink subframe may also be configured as a downlink relay subframe.

Thus, the donor base station allocates the uplink relay subframe and the downlink relay subframe to the relay device based on the four principles.

And 102, the relay equipment determines the HARQ time sequence relation by utilizing the uplink relay subframe and the downlink relay subframe.

It should be noted that, as an extension of the embodiment of the present invention, the present invention further provides another embodiment, specifically as shown in fig. 2, the method includes the following steps:

step 201 is similar to step 101 described above and will not be described herein again.

Step 202, the relay device receives an RRC signaling; here, the RRC signaling carries HARQ timing relationship.

Here, the RRC signaling carries the configured HARQ timing relationship, specifically: a timing relationship between the R-PDSCH and its corresponding ACK/NACK, and/or a timing relationship between the R-UL grant and the R-PUSCH.

Step 203, the relay device determines the HARQ timing relationship by using the uplink relay subframe and the downlink relay subframe.

The HARQ timing relationship determined in step 102 or step 203 includes: the timing relationship between the R-PDSCH and its corresponding ACK/NACK (denoted case 1), and/or the timing relationship between the R-UL grant and the R-PUSCH (denoted case 2).

In case 1, step 102 or step 203 is specifically: if a donor base station transmits R-PDSCH (marked as downlink data) to relay equipment in a certain downlink relay subframe, if the downlink relay subframe has a corresponding uplink relay subframe in the timing relationship between LTE Rel-8 PDSCH and ACK/NACK, the relay equipment transmits ACK/NACK information in the corresponding uplink subframe, and if the corresponding uplink subframe does not exist, the relay equipment transmits the ACK/NACK information to the donor base station in the first uplink relay subframe 4ms after the downlink relay subframe.

For case 2, step 102 or step 203 is specifically: if the donor base station transmits the R-UL grant in a certain downlink relay subframe, the R-UL grant schedules a unique uplink relay subframe to transmit R-PUSCH (marked as the data) to the donor base station, specifically, the relay device transmits R-PUSCH to the donor base station in the Kth subframe after receiving the R-UL grant.

The above cases 1 and 2 are described below by specific examples.

The first embodiment is as follows:

this embodiment is mainly directed to the uplink and downlink subframe configuration numbered 2 in table 1 and is denoted as TDD uplink and downlink configuration 2. Fig. 3 is a schematic diagram of an LTE Rel-8 HARQ timing relationship of TDD uplink and downlink configuration 2. As shown in fig. 3, the upper part of fig. 3 is the timing relationship of PDSCH and ACK/NACK, and the lower part is the timing relationship of UL grant and PUSCH. As can be seen from fig. 3, for TDD uplink and downlink configuration 2, there are only 2 uplink subframes per frame, namely subframe 2 and subframe 7. According to the timing relationship between the PDSCH and the ACK/NACK shown in the upper part of fig. 3, it can be known that the downlink subframes corresponding to the subframe 2 are subframes 4, 5, 6, 8, and it can be seen that only subframes 5 and 6 in all downlink subframes corresponding to the subframe 2 cannot be configured as downlink relay subframes, but the proportion of the subframes 5 and 6 is not more than half, that is, not most of all downlink subframes corresponding to the subframe is at least one of subframes 0, 1, 5, and 6, corresponding to the third principle in the above principle, therefore, it can be known that the subframe 2 can be configured as uplink relay subframe, and accordingly, according to the third principle, it can be known that subframes 4 and 8 corresponding to the subframe 2 can be configured as downlink relay subframes, as an extension of the embodiment of the present invention, and according to the third principle, it can be known that the downlink relay subframes not corresponding to the subframe 2, namely subframes 3 and 9, can also be configured as downlink relay subframes, to support higher downstream loads.

Similarly, for the subframe 7, it can be known from the timing relationship between the PDSCH and the ACK/NACK shown in the upper part of fig. 3 that the downlink subframes corresponding to the subframe 7 are subframes 9, 0, 1 and 3, where only subframes 0 and 1 of all corresponding downlink subframes cannot be configured as downlink relay subframes, but the proportion of the subframes 0 and 1 is not more than half, that is, the majority of all corresponding downlink subframes is not at least one of subframes 0, 1, 5 and 6, corresponding to the third principle in the above principle, therefore, it can be known that the subframe 7 can be configured as uplink relay subframe, and accordingly, according to the third principle, it can be known that subframes 3 and 9 corresponding to the subframe 7 can be configured as downlink relay subframes, as an extension of the embodiment of the present invention, and according to the third principle, it can be known that the downlink subframes which are not corresponding to the subframe 7, that are subframes 4 and 8, can also be configured as downlink relay subframes, to support higher downstream loads.

The configuration of the uplink relay subframe and the downlink relay subframe in the TDD uplink and downlink configuration 2 is described above. In order to make the technical solution provided by the present application easier to understand, a downlink-uplink relay subframe ratio of 4:1 in TDD uplink-downlink configuration 2 is described below as an example. It should be noted that this example is only for the purpose of making the present application clearer and is not intended to limit the present application.

When the downlink-uplink relay subframe ratio is 4:1, one of the following 2 configurations can be selected.

The first configuration:

based on the above description of TDD uplink and downlink configuration 2, it can be known that, in this first configuration, the donor base station allocates uplink and downlink relay subframes for the relay device, which is specifically shown in table 5.

TABLE 5

Wherein D is a downlink subframe, U is an uplink subframe, where a number 0 corresponding to the backhaul configuration in the table entry is only one identifier, and may also be 1 or another value, which is not limited herein. In order to make the technical solution of the present application easy to understand, the number of the backhaul configuration is denoted as 0, and the uplink and downlink relay subframe configuration ratio is denoted as 4: in table 5, where subframes 3, 4, 8, and 9 in backhaul configuration 0 correspond to a symbol √ indicates that the subframes 3, 4, 8, and 9 are uplink and downlink relay subframe configuration ratios 4, which are backhaul configuration 0: in the downlink relay subframe under 1, similarly, the symbol √ corresponds to the subframe 2, which indicates that U is the uplink relay subframe under the backhaul configuration 0, i.e., the uplink-downlink relay subframe configuration ratio 4: 1. The analysis principle of each table is similar, and the detailed description is omitted.

Based on table 5, if the method shown in fig. 1 is adopted, in step 101, the donor base station allocates a downlink relay subframe and an uplink relay subframe to the relay device, as shown in table 5 specifically, that is: subframe 2 is an uplink relay subframe, and subframes 3, 4, 8, and 9 are downlink relay subframes.

As such, when the relay device receives the R-UL grant at subframe n, it transmits the R-PUSCH on subframe n + K. As shown in table 5, it can be seen that subframes 3, 4, 8, and 9 are downlink relay subframes, so that the relay device can only receive the R-UL grant on subframes 3, 4, 8, and 9, and since the uplink relay subframe is subframe 2, based on the minimum consideration of delay, subframe n can be defined as subframe 8, that is, the relay device can only receive the R-UL grant in subframe 8; after that, the relay device transmits R-PUSCH on subframe n + K, where the value of K must satisfy that the relay device finally transmits R-PUSCH on subframe 2, and based on this, as an embodiment of the present invention, the value of K is defined as 4, that is, the relay device will tend to transmit R-PUSCH on subframe 8+4, that is, subframe 2 of the next frame, as shown in table 6 below.

TABLE 6

And if the relay device receives the R-PDSCH on the subframe n-K, the relay device sends a corresponding ACK/NACK on the subframe n, where, as shown in table 5, the uplink relay subframe is subframe 2, that is, the relay device can only send a corresponding ACK/NACK on subframe 2. Since the subframes 3, 4, 8, and 9 are downlink relay subframes, the K value corresponding to the subframe 2 should satisfy that the relay device receives the R-PDSCH on the subframe 3, 4, 8, or 9. Based on this, as an embodiment of the present invention, the K value is defined as 13, 9, 8, 4, which is specifically shown in table 7 below.

TABLE 7

It should be noted that, in the method shown in fig. 1, in step 101, the donor base station only allocates uplink and downlink relay subframes shown in table 5 to the relay device; as for tables 6 and 7, in order to facilitate the relay device to determine the HARQ timing relationship, tables 6 and 7 are written into the specification, so that when the relay device receives the R-PDSCH or the R-UL grant, the relay device can transmit the corresponding ACK/NACK or R-PUSCH according to the corresponding specification.

If the method shown in fig. 2 is adopted, in step 201, the donor base station allocates the downlink relay subframe and the uplink relay subframe shown in table 5 to the relay device, and then, in step 202, the donor base station sends an RRC signaling carrying an HARQ timing relationship configured for the relay device, where the HARQ timing relationship may be configured according to the timing relationships given in tables 6 and 7, and specifically includes: the timing relationship between the R-UL grant and the R-PUSCH and the timing relationship between the R-PDSCH and its corresponding ACK/NACK, where the timing relationship between the R-UL grant and the R-PUSCH and the timing relationship between the R-PDSCH and its corresponding ACK/NACK may be shown in tables 6 and 7, respectively, or determined according to tables 6 and 7. In this way, when the relay equipment receives the subframe of the R-PDSCH, the relay equipment sends ACK/NACK corresponding to the received R-PDSCH to the donor base station on the subframe determined according to the HARQ timing relation specified by the RRC signaling; and when the relay device receives the subframe of the R-UL grant, transmitting the R-PUSCH to the donor base station on the subframe determined according to the HARQ timing relation specified by the RRC instruction.

So far, the description of the first configuration when the downlink-uplink relay subframe ratio is 4:1 is completed. The second configuration is described below when the downlink-uplink relay subframe ratio is 4: 1.

Second configuration

Based on the above description of TDD uplink and downlink configuration 2, it can be known that the donor base station allocates uplink and downlink relay subframes for the relay device, which is specifically shown in table 8. That is, subframe 7 is an uplink relay subframe, and subframes 3, 4, 8, and 9 are downlink relay subframes.

TABLE 8

Based on table 8, if the method shown in fig. 1 is adopted, in step 101, the donor base station allocates a downlink relay subframe and an uplink relay subframe to the relay device, as shown in table 8 specifically, that is: subframe 7 is an uplink relay subframe, and subframes 3, 4, 8, and 9 are downlink relay subframes.

When the relay device receives the R-UL grant at subframe n, it transmits the R-PUSCH at subframe n + K. Here, as can be seen from table 8, subframes 3, 4, 8, and 9 are downlink relay subframes, so that the relay device can only receive the R-UL grant on subframes 3, 4, 8, and 9, and since the uplink relay subframe is subframe 7, based on reducing the HARQ timing impact between the relay device and the user equipment as much as possible, subframe n can be defined as subframe 3, that is, the relay device can only receive the R-UL grant in subframe 3; and then, the relay device sends the R-PUSCH on the subframe n + K, as shown in the following table 9, when the relay device receives the R-UL grant on the subframe 3, at this time, the K value corresponding to the subframe 3 is 4, that is, the relay device will tend to send the R-PUSCH on the subframe 3+4, that is, the subframe 7.

TABLE 9

And if the relay device receives the R-PDSCH on the subframe n-K, the relay device sends a corresponding ACK/NACK on the subframe n, where, as shown in table 8, the uplink relay subframe is subframe 7, that is, the relay device can only send a corresponding ACK/NACK on subframe 7. Since the subframes 3, 4, 8, and 9 are downlink relay subframes, the K value corresponding to the subframe 7 should satisfy that the relay device receives the R-PDSCH on the subframe 3, 4, 8, or 9. Based on this, it can be known that the K values corresponding to the sub-frame 7 are 13, 9, 8, and 4, as shown in table 10 below. Watch 10

If the method shown in fig. 2 is adopted, in step 201, the donor base station allocates the downlink relay subframe and the uplink relay subframe shown in table 8 to the relay device, that is, subframe 7 is the uplink relay subframe, and subframes 3, 4, 8, and 9 are downlink relay subframes.

Then, in step 202, the donor base station sends an RRC signaling carrying an HARQ timing relationship configured for the relay device, where the HARQ timing relationship may be configured according to the timing relationships given in tables 9 and 10, and specifically includes: the timing relationship between the R-ul grant and the R-PUSCH and the timing relationship between the R-PDSCH and its corresponding ACK/NACK, where the timing relationship between the R-ul grant and the R-PUSCH and the timing relationship between the R-PDSCH and its corresponding ACK/NACK may be shown in tables 9 and 10, respectively, or determined according to tables 9 and 10. In this way, when the relay equipment receives the subframe of the R-PDSCH, the relay equipment sends ACK/NACK corresponding to the received R-PDSCH to the donor base station on the subframe determined according to the HARQ timing relation specified by the RRC signaling; and when the relay device receives the subframe of the R-UL grant, transmitting the R-PUSCH to the donor base station on the subframe determined according to the HARQ timing relation specified by the RRC instruction.

Based on the description of the configuration when the downlink-uplink relay subframe ratio is 4:1, in order to improve the flexibility of the donor base station in configuring the uplink and downlink transmission time slots of the relay station and support a more flexible uplink and downlink transmission load proportion of the relay station, the embodiment of the invention further provides uplink and downlink configuration and HARQ (hybrid automatic repeat request) timing relationship combination of the relay equipment under TDD uplink and downlink configuration 2. See table 11 below for details.

TABLE 11

Based on table 11, if the method shown in fig. 1 is adopted, in step 101, the donor base station allocates a downlink relay subframe and an uplink relay subframe to the relay device, which is specifically shown in table 11. In table 11, the backhaul configuration number and the downlink uplink relay subframe have any corresponding relationship, and in table 11, only the ratio of the backhaul configuration 0 to the corresponding downlink uplink relay subframe is 1:1, the ratio of downlink and uplink subframes corresponding to the backhaul configuration 1 to the downlink and uplink relay subframes is 2:1, and the ratio of downlink and uplink subframes corresponding to backhaul configuration 2 to downlink and uplink relay subframes is 3: the uplink and downlink subframe configuration at 1 time and the downlink and uplink relay subframe ratio corresponding to the backhaul configuration 4 are 4: the configuration of the uplink and downlink subframes at time 1 is described as an example. That is, the backhaul configuration number is set, and is only one number, and has no practical meaning, and in practical application, different backhaul configuration numbers can be set according to practical situations. For example, table 11 above may be replaced with: the backhaul configuration number is 1, and the ratio of downlink uplink relay subframes is 1:1, the ratio of downlink and uplink subframes corresponding to backhaul configuration 0 to downlink and uplink relay subframes is 2:1, and the ratio of downlink and uplink subframes corresponding to backhaul configuration 3 to downlink and uplink relay subframes is 3: the ratio of uplink and downlink subframes in 1 time to the downlink and uplink relay subframes corresponding to backhaul configuration 2 is 4: and configuring uplink and downlink subframes in 1 time, and the like. The following description will be made by taking the above table 11 as an example. It should be noted that, the number of the backhaul configuration in each subsequent table also has an arbitrary corresponding relationship with the configuration of the uplink and downlink relay subframes, which is specifically described above and is not described in detail below.

This is obtained from table 11: when backhaul configuration is 0, namely the downlink uplink relay subframe ratio is 1:1, subframe 2 is an uplink relay subframe, subframe 8 is a downlink relay subframe, when backhaul configuration is 1, namely the downlink uplink relay subframe ratio is 2:1, subframe 2 is an uplink relay subframe, subframe 4 and subframe 8 are downlink relay subframes, when backhaul configuration is 2, namely the downlink uplink relay subframe ratio is 3:1, subframe 2 is an uplink relay subframe, and subframes 4, 8 and 9 are downlink relay subframes; when backhaul configuration 3, that is, the downlink-uplink relay subframe ratio is 4:1, subframe 2 is an uplink relay subframe, and subframes 3, 4, 8, and 9 are downlink relay subframes. It should be noted that, here, the first configuration example is described when the downlink-uplink relay subframe ratio is 4:1, and preferably, the embodiment of the present invention may also be implemented by a second configuration example, which has similar principles and is not described herein again.

When the relay device receives the R-UL grant at subframe n, it transmits the R-PUSCH at subframe n + K. Here, the R-ul grant may carry a backhaul configuration number or a downlink uplink relay subframe ratio, or the donor base station sends the backhaul configuration number or the downlink uplink relay subframe ratio through other signaling; then, as can be seen from table 11, if the backhaul configuration number received by the relay device is 0, that is, the backhaul configuration number corresponds to a downlink-uplink relay subframe ratio 1:1, since only subframe 8 is a downlink relay subframe when backhaul configuration 0 is performed, that is, the relay device can only receive the R-UL grant on subframe 8, at this time, the K value may be as shown in table 12, and the K value at this time should ensure that the relay device can finally transmit the R-PUSCH on the uplink relay subframe when backhaul configuration 0 is performed. Of course, if the backhaul configuration number is other values, such as 1, 2 or 3, the analysis principle is similar to that of the backhaul configuration 0, and will not be described herein again. As an embodiment of the present invention, the embodiment of the present invention provides a timing relationship between R-UL grant and R-PUSCH shown in table 12 for each different downlink/uplink relay subframe ratio.

TABLE 12

However, if the relay device receives the R-PDSCH on the subframe n-K, the relay device sends a corresponding ACK/NACK on the subframe n, where, as shown in table 11, if the backhaul configuration number received by the relay device is 0, it corresponds to a downlink uplink relay subframe ratio of 1:1, and since only the subframe 2 in the backhaul configuration 0 is an uplink relay subframe, that is, the relay device can only send the ACK/NACK on the subframe 2. Since the subframe 8 is a downlink relay subframe, based on this, it can be known that the K value corresponding to the subframe 2 should be able to satisfy that the relay device receives the R-PDSCH on the subframe 8. Of course, if the backhaul configuration number is 1, 2 or 3, the analysis principle is similar to that of the backhaul configuration number 0, and is not described herein again. As an embodiment of the present invention, here, the timing relationship between ACK/NACK and R-PDSCH shown in table 13 is provided for each different backhaul configuration.

Watch 13

It should be noted that, in the method shown in fig. 1, in step 101, the donor base station only allocates uplink and downlink relay subframes shown in table 11 to the relay device; as for tables 12 and 13, in order for the relay device to determine the HARQ timing relationship, tables 12 and 13 are written into the specification, so that when the relay device receives the R-PDSCH or R-UL grant, the relay device can transmit the corresponding ACK/NACK or R-PUSCH according to the corresponding specification.

If the method shown in fig. 2 is adopted, in step 201, the donor base station allocates the downlink relay subframe and the uplink relay subframe shown in table 11 to the relay device, and then, in step 202, the donor base station sends an RRC signaling carrying an HARQ timing relationship configured for the relay device, where the HARQ timing relationship may be configured according to the timing relationship given in tables 12 and 13, and specifically includes: the timing relationship between the R-UL grant and the R-PUSCH and the timing relationship between the R-PDSCH and its corresponding ACK/NACK, where the timing relationship between the R-UL grant and the R-PUSCH and the timing relationship between the R-PDSCH and its corresponding ACK/NACK may be shown in tables 12 and 13, respectively, or determined according to tables 12 and 13. In this way, when the relay equipment receives the subframe of the R-PDSCH, the relay equipment sends ACK/NACK corresponding to the received R-PDSCH to the donor base station on the subframe determined according to the HARQ timing relation specified by the RRC signaling; and when the relay device receives the subframe of the R-UL grant, transmitting the R-PUSCH to the donor base station on the subframe determined according to the HARQ timing relation specified by the RRC instruction.

So far, the method for determining the timing relationship when the ratio of the downlink and uplink relay subframes in the TDD uplink and downlink subframe configuration 2 is 4:1 is realized through the above description. TDD uplink and downlink subframe configuration 3 is described below.

Example two:

this embodiment is mainly directed to the uplink and downlink subframe configuration numbered 3 in table 1 and is denoted as TDD uplink and downlink configuration 3. Fig. 4 is a schematic diagram of an LTE Rel-8 HARQ timing relationship of TDD uplink and downlink configuration 3. As shown in fig. 4, the upper part in fig. 4 is the timing relationship of PDSCH and ACK/NACK, and the lower part is the timing relationship of UL grant and PUSCH. The TDD uplink/downlink configuration 3 is more complex than the TDD uplink/downlink configuration 2, and as can be seen from fig. 4, for the TDD uplink/downlink configuration 3, each frame has only 3 uplink subframes, that is, subframes 2, 3, and 4. According to the timing relationship between the PDSCH and the ACK/NACK shown in the upper part of fig. 4, it can be known that the downlink subframes corresponding to the subframe 2 are the subframes 1, 5, and 6, and since the subframes 1, 5, and 6 cannot be configured as downlink relay subframes, it can be known according to the first principle in the above-mentioned principles that the subframe 2 cannot be configured as an uplink relay subframe. For subframe 3, according to the timing relationship between the PDSCH and the ACK/NACK shown in the upper part of fig. 4, it can be known that the downlink subframes corresponding to subframe 3 are subframes 7 and 8, and since the downlink subframes corresponding to subframe 3, that is, subframes 7 and 8, are not included in the subframe range that cannot be configured as downlink relay subframes at all, that is, according to the fourth principle in the above principle, it can be known that subframe 3 can be configured as an uplink relay subframe, and accordingly, both subframes 7 and 8 can be configured as downlink relay subframes, and downlink relay subframe 9 that does not correspond to subframe 3 can also be configured as a downlink relay subframe, so as to support higher downlink load. For subframe 4, according to the corresponding relationship between the PDSCH and the ACK/NACK shown in fig. 4, it can be known that the downlink subframes corresponding to subframe 4 are subframes 9 and 0, and since subframe 0 may not be configured as a downlink relay subframe, but the proportion of subframe 0 does not exceed the majority of the downlink subframes corresponding to subframe 4, that is, corresponds to the third principle in the foregoing principles, it can be known that subframe 4 may be configured as an uplink relay subframe, and accordingly, according to the third principle, it can be known that subframe 9 corresponding to subframe 4 may be configured as a downlink relay subframe.

Based on the above description, the following description is made correspondingly for different service configurations in the TDD uplink and downlink configuration 3, and it should be emphasized that the relay link subframe configuration supported in a specific standard may be at least one or any combination of the following configurations.

(1): the ratio of downlink service to uplink service of the relay link is 1:1

Here, there may be a plurality of arrangements for this case, and accordingly, a plurality of timing relationships may be also corresponded, and based on this, at least one or any combination of the following 3 arrangements may be selected according to actual circumstances.

The first mode is as follows:

in the first mode, the uplink and downlink relay subframes allocated by the donor base station for the relay device are specifically shown in table 14, that is, subframe 3 is an uplink relay subframe, and subframe 7 is a downlink relay subframe.

TABLE 14

Thus, if the method shown in fig. 1 is adopted, in step 101, the donor base station allocates a downlink relay subframe and an uplink relay subframe to the relay device, as shown in table 14 specifically, that is: subframe 3 is an uplink relay subframe, and subframe 7 is a downlink relay subframe.

Based on the above allocation, when the relay device receives the R-UL grant at subframe n, it transmits the R-PUSCH on subframe n + K. Here, as shown in table 14, it can be seen that subframe 7 is a downlink relay subframe, so the relay device can only receive the R-UL grant on subframe 7, and since the uplink relay subframe is subframe 3, the K value here must satisfy that the relay device finally transmits the R-PUSCH on subframe 3, based on this, as an embodiment of the present invention, the K value here is limited to 6, and specifically, see table 15 below.

Watch 15

If the relay device receives the R-PDSCH on the subframe n-K, the relay device sends a corresponding ACK/NACK on the subframe n, where it can be seen from table 14 that the uplink relay subframe is subframe 3, i.e. the relay device can only send a corresponding ACK/NACK on subframe 3. Since the subframe 7 is a downlink relay subframe, the K value corresponding to the subframe 3 should satisfy that the relay device receives the R-PDSCH on the subframe 7. Based on this, as an embodiment of the present invention, the value K corresponding to the subframe 3 is defined as 6, and see the following table 16.

TABLE 16

It should be noted that, in the method shown in fig. 1, in step 101, the donor base station only allocates the uplink and downlink relay subframes shown in table 14 to the relay device, and as for table 15 and table 16, in order to facilitate the relay device to determine the HARQ timing relationship, table 15 and table 16 are written into the specification, so that when the relay device receives the R-PDSCH or R-UL grant, the relay device can specifically see the above description to send the corresponding ACK/NACK or R-PUSCH according to the corresponding specification.

If the method shown in fig. 2 is adopted, in step 201, the donor base station allocates the downlink relay subframe and the uplink relay subframe to the relay device as shown in table 14. Then, in step 202, the donor base station sends an RRC signaling carrying an HARQ timing relationship configured for the relay device, where the HARQ timing relationship may be configured according to the timing relationships given in tables 15 and 16, and specifically includes: the timing relationship between the R-UL grant and the R-PUSCH and the timing relationship between the R-PDSCH and its corresponding ACK/NACK, where the timing relationship between the R-UL grant and the R-PUSCH and the timing relationship between the R-PDSCH and its corresponding ACK/NACK may be shown in tables 15 and 16, respectively, or determined according to tables 15 and 16. In this way, when the relay equipment receives the subframe of the R-PDSCH, the relay equipment sends ACK/NACK corresponding to the received R-PDSCH to the donor base station on the subframe determined according to the HARQ timing relation specified by the RRC signaling; and when the relay device receives the subframe of the R-UL grant, transmitting the R-PUSCH to the donor base station on the subframe determined according to the HARQ timing relation specified by the RRC instruction.

Thus, the description of the first mode is completed.

The second mode is as follows:

in this manner, based on the above description of TDD uplink/downlink configuration 3, it can be known that the uplink/downlink relay subframe allocated by the donor base station for the relay device is specifically shown in table 17. That is, subframe 3 is an uplink relay subframe, and subframe 8 is a downlink relay subframe.

TABLE 17

Based on table 17, if the method shown in fig. 1 is adopted, in step 101, the donor base station allocates a downlink relay subframe and an uplink relay subframe to the relay device, as shown in table 17 specifically, that is: subframe 3 is an uplink relay subframe, and subframe 8 is a downlink relay subframe.

When the relay device receives the R-UL grant at subframe n, it transmits the R-PUSCH at subframe n + K. As can be seen from table 17, subframe 8 is a downlink relay subframe, so that the relay device can only receive the R-ul grant on subframe 8, and since the uplink relay subframe is subframe 3, the K value must be satisfied that the relay device finally transmits the R-PUSCH on subframe 3, based on this, as an embodiment of the present invention, the K value is limited to 5, and specifically, see table 18 below.

Watch 18

If the relay device receives the R-PDSCH on the subframe n-K, the relay device sends a corresponding ACK/NACK on the subframe n, where it can be seen from table 17 that the uplink relay subframe is subframe 3, i.e. the relay device can only send a corresponding ACK/NACK on subframe 3. Since the subframe 8 is a downlink relay subframe, the K value corresponding to the subframe 3 should satisfy that the relay device receives the R-PDSCH on the subframe 7. Based on this, as an embodiment of the present invention, the K value corresponding to the subframe 3 is defined as 5, and see the following table 19.

Watch 19

It should be noted that, in the method shown in fig. 1, in step 101, the donor base station only allocates the uplink and downlink relay subframes shown in table 17 to the relay device, and as for table 18 and table 19, in order to facilitate the relay device to determine the HARQ timing relationship, table 18 and table 19 are written into the specification, so that when the relay device receives the R-PDSCH or R-UL grant, the relay device can specifically see the above description to send the corresponding ACK/NACK or R-PUSCH according to the corresponding specification.

If the method shown in fig. 2 is adopted, in step 201, the donor base station allocates the downlink relay subframe and the uplink relay subframe shown in table 17 to the relay device, that is, subframe 3 is an uplink relay subframe, and subframe 8 is a downlink relay subframe. Then, in step 202, the donor base station sends an RRC signaling carrying an HARQ timing relationship configured for the relay device, where the HARQ timing relationship may be configured according to the timing relationships given in tables 18 and 19, and specifically includes: the timing relationship between the R-UL grant and the R-PUSCH and the timing relationship between the R-PDSCH and its corresponding ACK/NACK, where the timing relationship between the R-UL grant and the R-PUSCH and the timing relationship between the R-PDSCH and its corresponding ACK/NACK may be shown in tables 18 and 19, respectively, or determined according to tables 18 and 19. In this way, when the relay equipment receives the subframe of the R-PDSCH, the relay equipment sends ACK/NACK corresponding to the received R-PDSCH to the donor base station on the subframe determined according to the HARQ timing relation specified by the RRC signaling; and when the relay device receives the subframe of the R-UL grant, transmitting the R-PUSCH to the donor base station on the subframe determined according to the HARQ timing relation specified by the RRC instruction.

It should be noted that the application of the second method in the method shown in fig. 1 or fig. 2 is similar to the first method, and is not described here again.

The third mode is as follows:

in this manner, the uplink and downlink relay subframes allocated by the donor base station for the relay device are specifically shown in table 20. That is, subframe 4 is configured as an uplink relay subframe, and subframe 9 is configured as a downlink relay subframe.

Watch 20

Based on table 20, if the method shown in fig. 1 is used, in step 101, the donor base station allocates a downlink relay subframe and an uplink relay subframe to the relay device, which is specifically shown in table 20, that is: the downlink relay subframe is subframe 9, and the uplink subframe is subframe 4.

Based on the above allocation, when the relay device receives the R-UL grant at the subframe n, the relay device transmits the R-PUSCH at the subframe n + K, where the specific K value is shown in table 21, and the K value must ensure that the relay device will finally transmit the R-PUSCH at the subframe 4.

TABLE 21

If the relay device receives the R-PDSCH on the subframe n-K, the relay device sends a corresponding ACK/NACK on the subframe n, where it can be seen from table 20 that the uplink relay subframe is subframe 4, i.e. the relay device can only send a corresponding ACK/NACK on subframe 4. Since the subframe 9 is a downlink relay subframe, the K value corresponding to the subframe 4 should satisfy that the relay device receives the R-PDSCH on the subframe 9. Based on this, as an embodiment of the present invention, the K value is defined as 5, which is specifically shown in table 22 below.

TABLE 22

It should be noted that, in the method shown in fig. 1, in step 101, the donor base station only allocates uplink and downlink relay subframes shown in table 20 to the relay device, and as for tables 21 and 22, in order to facilitate the relay device to determine the HARQ timing relationship, the tables 21 and 22 are written into the specification, so that when the relay device receives the R-PDSCH or the R-UL grant, the relay device can specifically see the above description to send corresponding ACK/NACK or R-PUSCH according to the corresponding specification.

If the method shown in fig. 2 is adopted, in step 201, the donor base station allocates the downlink relay subframe and the uplink relay subframe shown in table 20 to the relay device, that is, the downlink relay subframe is subframe 9, and the uplink relay subframe is subframe 4.

Then, in step 202, the donor base station sends an RRC signaling carrying an HARQ timing relationship configured for the relay device, where the HARQ timing relationship includes: the timing relationship between the R-UL grant and the R-PUSCH and the timing relationship between the R-PDSCH and its corresponding ACK/NACK, where the timing relationship between the R-UL grant and the R-PUSCH and the timing relationship between the R-PDSCH and its corresponding ACK/NACK may be shown in tables 21 and 22, respectively, or determined according to tables 21 and 22. In this way, when the relay equipment receives the subframe of the R-PDSCH, the relay equipment sends ACK/NACK corresponding to the received R-PDSCH to the donor base station on the subframe determined according to the HARQ timing relation specified by the RRC signaling; and when the relay equipment receives the sub-frame of the R-ULgrant, the relay equipment transmits the R-PUSCH to the donor base station on the sub-frame determined according to the HARQ timing relation specified by the RRC instruction.

The above scenario in which the ratio of the downlink service to the uplink service of the relay link is 1:1 is analyzed, and a method corresponding to the ratio of the downlink service to the uplink service of the relay link being 2:1 is described below.

(2) The ratio of downlink service to uplink service of the relay link is 2:1

Here, when the relay link downlink traffic and uplink traffic ratio is 2:1, subframe 3 is an uplink relay subframe, and subframes 7 and 8 are downlink relay subframes, which are specifically shown in table 23.

TABLE 23

Based on table 23, if the method shown in fig. 1 is used, in step 101, the donor base station allocates a downlink relay subframe and an uplink relay subframe to the relay device, which is specifically shown in table 23, that is: the downlink relay subframe is subframes 7 and 8, and the uplink subframe is subframe 3.

Based on the above allocation, when the relay device receives the R-UL grant at the subframe n, the relay device transmits the R-PUSCH at the subframe n + K, where the specific K value is shown in table 24 below, and the K value here must ensure that the relay device will finally transmit the R-PUSCH at the uplink relay subframe, that is, at the current subframe 3.

Watch 24

If the relay device receives the R-PDSCH on the subframe n-K, the relay device sends a corresponding ACK/NACK on the subframe n, where it can be seen from table 23 that the uplink relay subframe is subframe 3, i.e. the relay device can only send a corresponding ACK/NACK on subframe 3. Since subframes 7 and 8 are downlink relay subframes, the K value corresponding to subframe 3 should satisfy that the relay device receives the R-PDSCH on subframe 7 or 8. Based on this, as an embodiment of the present invention, the K value is defined as 6 and 5, and specifically, as shown in the following table 25

TABLE 25

It should be noted that, in the method shown in fig. 1, in step 101, the donor base station only allocates the uplink and downlink relay subframes shown in table 23 to the relay device, and as for table 24 and table 25, in order to facilitate the relay device to determine the HARQ timing relationship, the table 24 and table 25 are written into the specification, so that when the relay device receives the R-PDSCH or R-UL grant, the relay device can specifically see the above description to send the corresponding ACK/NACK or R-PUSCH according to the corresponding specification.

If the method shown in fig. 2 is adopted, in step 201, the donor base station allocates the downlink relay subframe and the uplink relay subframe shown in table 23 to the relay device, that is, the downlink relay subframe is subframes 7 and 8, and the uplink relay subframe is subframe 3.

Then, in step 202, the donor base station sends an RRC signaling carrying an HARQ timing relationship configured for the relay device, where the HARQ timing relationship may be configured according to the timing relationships given in tables 24 and 25, and specifically includes: the timing relationship between the R-ul grant and the R-PUSCH and the timing relationship between the R-PDSCH and its corresponding ACK/NACK, where the timing relationship between the R-ul grant and the R-PUSCH and the timing relationship between the R-PDSCH and its corresponding ACK/NACK may be shown in tables 24 and 25, respectively, or determined according to tables 24 and 25. In this way, when the relay equipment receives the subframe of the R-PDSCH, the relay equipment sends ACK/NACK corresponding to the received R-PDSCH to the donor base station on the subframe determined according to the HARQ timing relation specified by the RRC signaling; and when the relay device receives the subframe of the R-UL grant, transmitting the R-PUSCH to the donor base station on the subframe determined according to the HARQ timing relation specified by the RRC instruction.

So far, the description of the method corresponding to the relay link downlink service and uplink service with the ratio of 2:1 is completed.

(3) The ratio of downlink service to uplink service of the relay link is 3:1

Here, when the relay link downlink traffic and uplink traffic ratio is 3:1, subframe 3 is an uplink relay subframe, and subframes 7, 8, and 9 are downlink relay subframes, which is specifically shown in table 26.

Watch 26

Based on table 26, if the method shown in fig. 1 is adopted, in step 101, the donor base station allocates a downlink relay subframe and an uplink relay subframe to the relay device, as shown in table 26 specifically, that is: the downlink relay subframe is subframes 7, 8 and 9, and the uplink subframe is subframe 3.

Based on the above allocation, when the relay device receives the R-UL grant at the subframe n, the relay device transmits the R-PUSCH at the subframe n + K, where the specific K value is shown in table 27 below, and the K value must ensure that the relay device finally transmits the R-PUSCH at the uplink relay subframe, that is, at the time, at the subframe 3.

Watch 27

If the relay device receives the R-PDSCH on the subframe n-K, the relay device sends a corresponding ACK/NACK on the subframe n, where it can be seen from table 26 that the uplink relay subframe is subframe 3, i.e. the relay device can only send a corresponding ACK/NACK on subframe 3. Since subframes 7, 8, and 9 are downlink relay subframes, the K value corresponding to subframe 3 should satisfy that the relay device receives the R-PDSCH on subframe 7, 8, or 9. Based on this, as an embodiment of the present invention, the K values are defined as 6, 5, and 4, which are specifically shown in the following table 28.

Watch 28

It should be noted that, in the method shown in fig. 1, in step 101, the donor base station only allocates the uplink and downlink relay subframes shown in table 26 to the relay device, and as for table 27 and table 28, in order to facilitate the relay device to determine the HARQ timing relationship, the table 27 and table 28 are written into the specification, so that when the relay device receives the R-PDSCH or R-UL grant, the relay device can specifically see the above description to send the corresponding ACK/NACK or R-PUSCH according to the corresponding specification.

If the method shown in fig. 2 is adopted, in step 201, the donor base station allocates downlink relay subframes and uplink relay subframes as shown in table 26 to the relay device, that is, the downlink relay subframes are subframes 7, 8, and 9, and the uplink relay subframe is subframe 3.

Then, in step 202, the donor base station sends an RRC signaling carrying the HARQ timing relationship configured for the relay device, where the HARQ timing relationship may be configured according to the timing relationships given in tables 27 and 28, and specifically includes: the timing relationship between the R-ul grant and the R-PUSCH and the timing relationship between the R-PDSCH and its corresponding ACK/NACK, where the timing relationship between the R-ul grant and the R-PUSCH and the timing relationship between the R-PDSCH and its corresponding ACK/NACK may be shown in tables 27 and 28, respectively, or determined according to tables 27 and 28. In this way, when the relay equipment receives the subframe of the R-PDSCH, the relay equipment sends ACK/NACK corresponding to the received R-PDSCH to the donor base station on the subframe determined according to the HARQ timing relation specified by the RRC signaling; and when the relay device receives the subframe of the R-UL grant, transmitting the R-PUSCH to the donor base station on the subframe determined according to the HARQ timing relation specified by the RRC instruction.

So far, the description of the method corresponding to the relay link downlink service and uplink service with the ratio of 3:1 is completed.

(4) The ratio of downlink service to uplink service of the relay link is 2:2

Here, when the relay link downlink traffic to uplink traffic ratio is 2:2, the relay link downlink traffic may be in one or any combination of the following 3 configurations, and the following 3 configurations are described separately.

A first configuration:

in the first configuration, subframes 3 and 4 are uplink relay subframes, and subframes 7 and 8 are downlink relay subframes, as shown in table 29.

Watch 29

Based on table 26, if the method shown in fig. 1 is adopted, in step 101, the donor base station allocates a downlink relay subframe and an uplink relay subframe to the relay device, as shown in table 29, that is: the downlink relay subframes are subframes 7 and 8, and the uplink subframes are subframes 3 and 4.

Based on the above allocation, when the relay device receives the R-UL grant at the subframe n, the relay device transmits the R-PUSCH at the subframe n + K, and the specific K value is shown in table 30 below:

watch 30

The value of K in table 30 must ensure that the relay device will eventually transmit R-PUSCH on the uplink relay subframe, i.e., subframe 3 or 4 at this time.

If the relay device receives the R-PDSCH on the subframe n-K, the relay device sends a corresponding ACK/NACK on the subframe n, where it can be seen from table 29 that the uplink relay subframes are subframes 3 and 4, i.e. the relay device can only send corresponding ACK/NACK on subframes 3 and 4. Since the subframes 7 and 8 are downlink relay subframes, the K values corresponding to the subframes 3 and 4 should satisfy that the relay device receives the R-PDSCH on the subframes 7 and 8. Based on this, as an embodiment of the present invention, it is defined that the K value corresponding to the subframe 3 is 6, and the K value corresponding to the subframe 4 is 6, as shown in table 31 below.

Watch 31

It should be noted that, in the method shown in fig. 1, in step 101, the donor base station only allocates uplink and downlink relay subframes shown in table 29 to the relay device, and as for table 30 and table 31, to facilitate the relay device to determine the HARQ timing relationship, table 30 and table 31 are written into the specification, so that when the relay device receives the R-PDSCH or R-UL grant, the relay device can specifically see the above description to send corresponding ACK/NACK or R-PUSCH according to the corresponding specification.

If the method shown in fig. 2 is adopted, in step 201, the donor base station allocates downlink relay subframes and uplink relay subframes shown in table 27 to the relay device, that is, the downlink relay subframes are subframes 7 and 8, and the uplink relay subframes are subframes 3 and 4.

Then, in step 202, the donor base station sends an RRC signaling carrying an HARQ timing relationship configured for the relay device, where the HARQ timing relationship may be configured according to the timing relationships given in tables 30 and 31, and specifically includes: the timing relationship between the R-ul grant and the R-PUSCH and the timing relationship between the R-PDSCH and its corresponding ACK/NACK, where the timing relationship between the R-ul grant and the R-PUSCH and the timing relationship between the R-PDSCH and its corresponding ACK/NACK may be shown in tables 30 and 31, respectively, or determined according to tables 30 and 31. In this way, when the relay equipment receives the subframe of the R-PDSCH, the relay equipment sends ACK/NACK corresponding to the received R-PDSCH to the donor base station on the subframe determined according to the HARQ timing relation specified by the RRC signaling; and when the relay device receives the subframe of the R-UL grant, transmitting the R-PUSCH to the donor base station on the subframe determined according to the HARQ timing relation specified by the RRC instruction.

A second configuration:

in the second configuration, subframes 3 and 4 are uplink relay subframes, and subframes 7 and 9 are downlink relay subframes, as shown in table 32.

Watch 32

Based on table 32, if the method shown in fig. 1 is adopted, in step 101, the donor base station allocates a downlink relay subframe and an uplink relay subframe to the relay device, as shown in table 32 specifically, that is: the downlink relay subframes are subframes 7 and 9, and the uplink subframes are subframes 3 and 4.

Based on the above allocation, when the relay device receives the R-UL grant at the subframe n, the relay device transmits the R-PUSCH at the subframe n + K, and the specific K value is shown in table 33, table 33

The value of K here must ensure that the relay device will eventually send R-PUSCH on the uplink relay subframe, i.e., subframe 3 or 4 at this time.

If the relay device receives the R-PDSCH on the subframe n-K, the relay device sends a corresponding ACK/NACK on the subframe n, where, as shown in table 32, the uplink relay subframes are subframes 3 and 4, that is, the relay device can only send corresponding ACK/NACK on subframes 3 and 4. Since the subframes 7 and 9 are downlink relay subframes, the K values corresponding to the subframes 3 and 4 should satisfy that the relay device receives the R-PDSCH on the subframes 7 and 9. Based on this, as an embodiment of the present invention, it is defined that the K value corresponding to the subframe 3 is 6, and the K value corresponding to the subframe 4 is 5, as shown in table 34 below.

Watch 34

If the method shown in fig. 2 is adopted, in step 201, the donor base station allocates downlink relay subframes and uplink relay subframes shown in table 32 to the relay device, that is, the downlink relay subframes are subframes 7 and 9, and the uplink relay subframes are subframes 3 and 4. Then, in step 202, the donor base station sends an RRC signaling carrying the HARQ timing relationship configured for the relay device, where the HARQ timing relationship may be configured according to the timing relationships given in tables 33 and 34, and specifically includes: the timing relationship between the R-UL grant and the R-PUSCH and the timing relationship between the R-PDSCH and its corresponding ACK/NACK, where the timing relationship between the R-UL grant and the R-PUSCH and the timing relationship between the R-PDSCH and its corresponding ACK/NACK may be shown in tables 33 and 34, respectively, or determined according to tables 33 and 34. In this way, when the relay equipment receives the subframe of the R-PDSCH, the relay equipment sends ACK/NACK corresponding to the received R-PDSCH to the donor base station on the subframe determined according to the HARQ timing relation specified by the RRC signaling; and when the relay device receives the subframe of the R-UL grant, transmitting the R-PUSCH to the donor base station on the subframe determined according to the HARQ timing relation specified by the RRC instruction.

A third configuration:

in the third configuration, subframes 3 and 4 are uplink relay subframes, and subframes 8 and 9 are downlink relay subframes, which are specifically shown in table 35. Watch 35

Based on table 35, if the method shown in fig. 1 is adopted, in step 101, the donor base station allocates a downlink relay subframe and an uplink relay subframe to the relay device, as shown in table 35 specifically, that is: the downlink relay subframes are subframes 8 and 9, and the uplink subframes are subframes 3 and 4.

Based on the above allocation, when the relay device receives the R-UL grant at the subframe n, the relay device transmits the R-PUSCH at the subframe n + K, where the specific K value is shown in table 36, where the K value must ensure that the relay device will finally transmit the R-PUSCH at the uplink relay subframe, i.e., at the current subframe 3 or 4

Watch 36

If the relay device receives the R-PDSCH on the subframe n-K, the relay device sends a corresponding ACK/NACK on the subframe n, where it can be seen from table 35 that the uplink relay subframes are subframes 3 and 4, i.e. the relay device can only send corresponding ACK/NACK on subframes 3 and 4. Since the subframes 8 and 9 are downlink relay subframes, the K values corresponding to the subframes 3 and 4 should satisfy that the relay device receives the R-PDSCH on the subframes 8 and 9. Based on this, as an embodiment of the present invention, it is defined that the K value corresponding to the subframe 3 is 5, and the K value corresponding to the subframe 4 is 5, as shown in table 37 below.

Watch 37

If the method shown in fig. 2 is adopted, in step 201, the donor base station allocates downlink relay subframes and uplink relay subframes shown in table 35 to the relay device, that is, the downlink relay subframes are subframes 8 and 9, and the uplink relay subframes are subframes 3 and 4. Then, in step 202, the donor base station sends an RRC signaling carrying the HARQ timing relationship configured for the relay device, where the HARQ timing relationship may be configured according to the timing relationships given in tables 36 and 37, and specifically includes: the timing relationship between the R-UL grant and the R-PUSCH and the timing relationship between the R-PDSCH and its corresponding ACK/NACK, where the timing relationship between the R-UL grant and the R-PUSCH and the timing relationship between the R-PDSCH and its corresponding ACK/NACK may be shown in tables 36 and 37, respectively, or determined according to tables 36 and 37. In this way, when the relay equipment receives the subframe of the R-PDSCH, the relay equipment sends ACK/NACK corresponding to the received R-PDSCH to the donor base station on the subframe determined according to the HARQ timing relation specified by the RRC signaling; and when the relay device receives the subframe of the R-UL grant, transmitting the R-PUSCH to the donor base station on the subframe determined according to the HARQ timing relation specified by the RRC instruction.

So far, the description of the method corresponding to the relay link downlink service and uplink service with the ratio of 2:2 is completed. It should be noted that, when the ratio of the downlink traffic to the uplink traffic of the relay link is 2:2, the corresponding implementation method is not limited to the above three configurations, and those skilled in the art can fully expand the configuration based on their own general knowledge.

(5) The ratio of downlink service to uplink service of the relay link is 3:2

Here, when the relay link downlink traffic to uplink traffic ratio is 3:2, subframes 3 and 4 may be configured as uplink relay subframes, and subframes 7, 8, and 9 are downlink relay subframes, as shown in table 38.

Watch 38

Based on table 38, if the method shown in fig. 1 is adopted, in step 101, the donor base station allocates a downlink relay subframe and an uplink relay subframe to the relay device, as shown in table 38 specifically, that is: the downlink relay subframes are subframes 7, 8 and 9, and the uplink subframes are subframes 3 and 4.

Based on the above allocation, when the relay device receives the R-UL grant at the subframe n, the relay device transmits the R-PUSCH at the subframe n + K, where the specific K value is shown in table 39 below, and the K value here must ensure that the relay device will finally transmit the R-PUSCH at the uplink relay subframe, i.e., at the current subframe 3 or 4.

Watch 39

If the relay device receives the R-PDSCH on the subframe n-K, the relay device sends a corresponding ACK/NACK on the subframe n, where it can be seen from table 38 that the uplink relay subframes are subframes 3 and 4, i.e. the relay device can only send corresponding ACK/NACK on subframes 3 and 4. Since subframes 7, 8, and 9 are downlink relay subframes, the K values corresponding to subframes 3 and 4 should satisfy that the relay device receives the R-PDSCH on subframes 7, 8, and 9. Based on this, as an embodiment of the present invention, it is defined that the K values corresponding to the sub-frame 3 are 6 and 5, and the K value corresponding to the sub-frame 4 is 5, as shown in table 40 below.

Watch 40

If the method shown in fig. 2 is adopted, in step 201, the donor base station allocates downlink relay subframes and uplink relay subframes as shown in table 38 to the relay device, that is, the downlink relay subframes are subframes 7, 8, and 9, and the uplink relay subframes are subframes 3 and 4.

Then, in step 202, the donor base station sends an RRC signaling carrying the HARQ timing relationship configured for the relay device, where the HARQ timing relationship may be configured according to the timing relationships given in tables 39 and 40, and specifically includes: the timing relationship between the R-ul grant and the R-PUSCH and the timing relationship between the R-PDSCH and its corresponding ACK/NACK, where the timing relationship between the R-ul grant and the R-PUSCH and the timing relationship between the R-PDSCH and its corresponding ACK/NACK may be shown in tables 39 and 40, respectively, or determined according to tables 39 and 40. In this way, when the relay equipment receives the subframe of the R-PDSCH, the relay equipment sends ACK/NACK corresponding to the received R-PDSCH to the donor base station on the subframe determined according to the HARQ timing relation specified by the RRC signaling; and when the relay device receives the subframe of the R-UL grant, transmitting the R-PUSCH to the donor base station on the subframe determined according to the HARQ timing relation specified by the RRC instruction.

Based on the above description of the configuration of each different downlink-uplink relay subframe ratio, in order to improve the flexibility of the donor base station in configuring the uplink and downlink transmission time slots of the relay station to support a more flexible uplink and downlink transmission load ratio of the relay station, the embodiment of the present invention further provides uplink and downlink configuration and HARQ timing relationship combination of the TDD uplink and downlink configuration 3 downlink relay device.

As an embodiment of the present invention, the ratio of downlink relay subframes to uplink relay subframes may be 2: 1. 3:1 and 3:2, see table 41 for details.

Table 41

Based on table 41, if the method shown in fig. 1 is adopted, in step 101, the donor base station allocates a downlink relay subframe and an uplink relay subframe to the relay device, specifically as shown in table 41, where the backhaul configuration number and the downlink uplink relay subframe ratio in table 41 have a corresponding relationship, and here, the backhaul configuration 0 corresponds to the downlink uplink relay subframe ratio 2:1, backhaul configuration 1 corresponds to a downlink uplink relay subframe ratio of 3:1, and backhaul configuration 2 corresponds to a downlink uplink relay subframe ratio 3: for example, from table 41, it can be seen that: when backhaul configuration 0, that is, a downlink uplink relay subframe ratio is 2:1, subframe 3 is an uplink relay subframe, subframes 7 and 8 are downlink relay subframes, and backhaul configuration 1, that is, a downlink uplink relay subframe ratio is 3:1, subframe 3 is an uplink relay subframe, subframes 7, 8 and 9 are downlink relay subframes, and backhaul configuration 2, that is, the downlink-uplink relay subframe ratio is 3: at time 2, subframes 3 and 4 are uplink relay subframes, and subframes 7, 8, and 9 are downlink relay subframes.

Based on the above allocation, when the relay device receives the R-UL grant in the subframe n, where the R-UL grant may carry the backhaul configuration number, or the donor base station sends the backhaul configuration number through other signaling; the relay device sends an R-PUSCH in subframe n + K, where the specific K value is shown in table 42 below, and the K value here must ensure that the relay device will finally send the R-PUSCH in the uplink relay subframe corresponding to the received backhaul configuration number.

Watch 42

And if the relay device receives the R-PDSCH on the subframe n-K, the relay device sends a corresponding ACK/NACK on the subframe n, where the specific K value is shown in table 43, where the K value must ensure that the relay device will finally send the ACK/NACK on the uplink relay subframe corresponding to the received backhaul configuration number.

Watch 43

If the method shown in fig. 2 is adopted, in step 201, the donor base station allocates the downlink relay subframe and the uplink relay subframe shown in table 41 to the relay device, and then, in step 202, the donor base station sends an RRC signaling carrying an HARQ timing relationship configured for the relay device, where the HARQ timing relationship may be configured according to the timing relationship given in tables 42 and 43, and specifically includes: the timing relationship between the R-UL grant and the R-PUSCH and the timing relationship between the R-PDSCH and its corresponding ACK/NACK, where the timing relationship between the R-UL grant and the R-PUSCH and the timing relationship between the R-PDSCH and its corresponding ACK/NACK may be shown in tables 42 and 43, respectively, or determined according to tables 42 and 43. In this way, when the relay equipment receives the subframe of the R-PDSCH, the relay equipment sends ACK/NACK corresponding to the received R-PDSCH to the donor base station on the subframe determined according to the HARQ timing relation specified by the RRC signaling; and when the relay device receives the subframe of the R-UL grant, transmitting the R-PUSCH to the donor base station on the subframe determined according to the HARQ timing relation specified by the RRC instruction.

As another embodiment of the present invention, the ratio of downlink uplink relay subframes to 1: 1. 2: 1. 3:1 and 3:2, see table 44 for details. It should be noted that, here, the second manner is taken as an example when the downlink-uplink relay subframe ratio is 1:1, and preferably, the first manner or the third manner may also be taken as an example in the embodiment of the present invention, the principle is similar, and details are not described here again.

Watch 44

Based on table 44, if the method shown in fig. 1 is adopted, in step 101, the donor base station allocates a downlink relay subframe and an uplink relay subframe to the relay device, where backhaul configuration numbers and downlink uplink relay subframe ratios in table 44 have a corresponding relationship, and here, a backhaul configuration 0 corresponds to a downlink uplink relay subframe ratio 1:1, backhaul configuration 1 corresponds to a downlink uplink relay subframe ratio 2:1, backhaul configuration 2 corresponds to a downlink uplink relay subframe ratio 3: 1. and backhaul configuration 3 corresponds to a downlink uplink relay subframe ratio of 3:2, as an example, this can be found from table 44: when backhaul configuration is 0, namely the ratio of downlink relay subframes to uplink relay subframes is 1:1, subframe 3 is an uplink relay subframe, and subframe 8 is a downlink relay subframe; when backhaul configuration 1, that is, a downlink uplink relay subframe ratio is 2:1, subframe 3 is an uplink relay subframe, subframes 7 and 8 are downlink relay subframes, and backhaul configuration 2, that is, a downlink uplink relay subframe ratio is 3:1, subframe 3 is an uplink relay subframe, subframes 7, 8 and 9 are downlink relay subframes, and backhaul configuration 3, that is, the downlink-uplink relay subframe ratio is 3: at time 2, subframes 3 and 4 are uplink relay subframes, and subframes 7, 8, and 9 are downlink relay subframes.

Based on the above allocation, when the relay device receives the R-UL grant in the subframe n, where the R-UL grant may carry the backhaul configuration number, or the donor base station sends the backhaul configuration number through other signaling; the relay device sends an R-PUSCH in subframe n + K, where the specific K value is shown in table 45 below, and the K value here must ensure that the relay device will finally send the R-PUSCH in the uplink relay subframe corresponding to the received backhaul configuration number.

TABLE 45

If the relay device receives the R-PDSCH on the subframe n-K, the relay device sends a corresponding ACK/NACK on the subframe n, and the specific K value is shown in table 46 below:

TABLE 46

Here, the value K in table 46 must ensure that the relay device will eventually send ACK/NACK on the uplink relay subframe corresponding to the received lower backhaul configuration number.

If the method shown in fig. 2 is adopted, in step 201, the donor base station allocates the downlink relay subframe and the uplink relay subframe shown in table 44 to the relay device, and then, in step 202, the donor base station sends an RRC signaling carrying an HARQ timing relationship configured for the relay device, where the HARQ timing relationship may be configured according to the timing relationship given in tables 45 and 46, and specifically includes: the timing relationship between the R-UL grant and the R-PUSCH and the timing relationship between the R-PDSCH and its corresponding ACK/NACK, where the timing relationship between the R-UL grant and the R-PUSCH and the timing relationship between the R-PDSCH and its corresponding ACK/NACK may be shown in tables 45 and 46, respectively, or determined according to tables 45 and 46. In this way, when the relay equipment receives the subframe of the R-PDSCH, the relay equipment sends ACK/NACK corresponding to the received R-PDSCH to the donor base station on the subframe determined according to the HARQ timing relation specified by the RRC signaling; and when the relay device receives the subframe of the R-UL grant, transmitting the R-PUSCH to the donor base station on the subframe determined according to the HARQ timing relation specified by the RRC instruction.

As another embodiment of the present invention, the ratio of downlink uplink relay subframes to 1: 1. 2: 1. 3: 1. 2:2 and 3:2, see table 47 for details. It should be noted that, here, the second mode is used when the downlink-uplink relay subframe ratio is 1:1, and the third configuration example is used when the relay link downlink service to uplink service ratio is 2:2, and preferably, the first mode or the third mode may also be used when the downlink-uplink relay subframe ratio is 1:1, and the first configuration and the second configuration example may also be used when the relay link downlink service to uplink service ratio is 2:2, which have similar principles and are not described herein again.

Watch 47

Based on table 47, if the method shown in fig. 1 is adopted, in step 101, the donor base station allocates a downlink relay subframe and an uplink relay subframe to the relay device, specifically as shown in table 47, where backhaul configuration numbers and downlink uplink relay subframe ratios in table 47 have a corresponding relationship, and here, backhaul configuration 0 corresponds to downlink uplink relay subframe ratio 1:1, backhaul configuration 1 corresponds to a downlink uplink relay subframe ratio 2:1, backhaul configuration 2 corresponds to a downlink uplink relay subframe ratio 3: 1. backhaul configuration 3 corresponds to downlink uplink relay subframe ratio 2:2, and backhaul configuration 4 corresponds to a downlink uplink relay subframe ratio of 3:2, as an example, this can be found from table 47: when backhaul configuration 0, that is, a downlink-uplink relay subframe ratio is 1:1, subframe 3 is an uplink relay subframe, subframe 8 is a downlink relay subframe, when backhaul configuration 1, that is, a downlink-uplink relay subframe ratio is 2:1, subframe 3 is an uplink relay subframe, subframes 7 and 8 are downlink relay subframes, and backhaul configuration 2, that is, a downlink-uplink relay subframe ratio is 3:1, subframe 3 is an uplink relay subframe, subframes 7, 8 and 9 are downlink relay subframes, and backhaul configuration 3, that is, the downlink-uplink relay subframe ratio is 2: and 2, subframes 3 and 4 are uplink relay subframes, subframes 8 and 9 are downlink relay subframes, and backhaul configuration 4, namely the downlink relay subframe ratio is 3: at time 2, subframes 3 and 4 are uplink relay subframes, and subframes 7, 8, and 9 are downlink relay subframes.

Based on the above allocation, when the relay device receives the R-UL grant in the subframe n, where the R-UL grant may carry the backhaul configuration number, or the donor base station sends the backhaul configuration number through other signaling; the relay device sends an R-PUSCH in subframe n + K, where the specific K value is shown in table 48 below, and the K value here must ensure that the relay device will finally send the R-PUSCH in the uplink relay subframe corresponding to the received backhaul configuration number.

Watch 48

And if the relay device receives the R-PDSCH on the subframe n-K, the relay device sends a corresponding ACK/NACK on the subframe n, where the specific K value is shown in table 49, where the K value must ensure that the relay device will finally send the ACK/NACK on the uplink relay subframe corresponding to the received backhaul configuration number.

Watch 49

If the method shown in fig. 2 is adopted, in step 201, the donor base station allocates the downlink relay subframe and the uplink relay subframe shown in table 47 to the relay device, and then, in step 202, the donor base station sends an RRC signaling carrying an HARQ timing relationship configured for the relay device, where the HARQ timing relationship may be configured according to the timing relationship given in tables 48 and 49, and specifically includes: the timing relationship between the R-UL grant and the R-PUSCH and the timing relationship between the R-PDSCH and its corresponding ACK/NACK, where the timing relationship between the R-UL grant and the R-PUSCH and the timing relationship between the R-PDSCH and its corresponding ACK/NACK may be shown in tables 48 and 49, respectively, or determined according to tables 48 and 49. In this way, when the relay equipment receives the subframe of the R-PDSCH, the relay equipment sends ACK/NACK corresponding to the received R-PDSCH to the donor base station on the subframe determined according to the HARQ timing relation specified by the RRC signaling; and when the relay device receives the subframe of the R-UL grant, transmitting the R-PUSCH to the donor base station on the subframe determined according to the HARQ timing relation specified by the RRC instruction.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A method for determining a hybrid automatic repeat request (HARQ) timing relationship of a relay link is characterized by comprising the following steps:

the method comprises the steps that relay equipment receives an uplink relay subframe and a downlink relay subframe which are distributed to the relay equipment by a donor base station according to the time sequence relation of a PDSCH and ACK/NACK;

if the downlink relay subframe and the uplink relay subframe correspond to TDD uplink and downlink configuration 3, the ratio of the downlink relay subframe to the uplink relay subframe is 3:1, the uplink relay subframe is subframe 3, and the downlink relay subframes are subframes 7, 8 and 9, then,

the relay equipment receives the R-UL grant at a subframe n and sends an R-PUSCH at a subframe n + K, wherein n is 9 and K is 4; and/or the relay equipment receives the R-PDSCH on a subframe n-K, and sends ACK/NACK corresponding to the R-PDSCH on the subframe n, wherein n is 3, and K is 4, 5 or 6.

2. The method of claim 1, wherein if the downlink relay subframe and the uplink relay subframe correspond to TDD uplink/downlink configuration 2, the ratio of the downlink relay subframe to the uplink relay subframe is 4:1, the uplink relay subframe is subframe 2, and the downlink relay subframes are subframes 3, 4, 8, and 9, then the method further includes:

the relay equipment receives the R-UL grant on a subframe n and sends an R-PUSCH on a subframe n + K, wherein n is 8 and K is 4; and/or the presence of a gas in the gas,

the relay equipment receives the R-PDSCH on a subframe n-K, and sends ACK/NACK corresponding to the R-PDSCH on the subframe n, wherein n is 2, and K is 13, 9, 8 or 4.

3. The method of claim 1, wherein if the downlink relay subframe and the uplink relay subframe correspond to TDD uplink/downlink configuration 2, the ratio of the downlink relay subframe to the uplink relay subframe is 4:1, the uplink relay subframe is subframe 7, and the downlink relay subframes are subframes 3, 4, 8, and 9, then the method further includes:

the relay equipment receives the R-UL grant on a subframe n and sends an R-PUSCH on a subframe n + K, wherein n is 3 and K is 4; and/or the presence of a gas in the gas,

the relay equipment receives the R-PDSCH on a subframe n-K, and sends ACK/NACK corresponding to the R-PDSCH on the subframe n, wherein n is 7, and K is 13, 9, 8 or 4.

4. The method of claim 1, wherein if the downlink relay subframe and the uplink relay subframe correspond to TDD uplink/downlink configuration 2, the downlink relay subframe and the uplink relay subframe are displayed by the following entries:

wherein, D is a downlink subframe, U is an uplink subframe, the number 0, 1, 2, 3 corresponding to the backhaul configuration in the table entry is only one identifier, and the identifier has an arbitrary corresponding relationship with the uplink relay subframe and the downlink relay subframe in the table entry; for each backhaul configuration, if D below the backhaul configuration corresponds to a flag √ denotes that D is a downlink relay subframe under the backhaul configuration, and U corresponds to a flag √ denotes that U is an uplink relay subframe under the backhaul configuration, the method further includes:

when the relay device receives the R-UL grant at the subframe 8, the K value corresponding to the subframe 8 is searched in the following table entry according to the received backhaul configuration number,

transmitting R-PUSCH on a subframe 8+ K; and/or the presence of a gas in the gas,

when the relay equipment receives the R-PDSCH on a subframe n-K, the corresponding ACK/NACK is sent on the subframe n, at the moment, n is 2, and the K value is set as the following table entry by the relay equipment according to the received backhaul configuration number

To find.

5. The method of claim 1, wherein if the downlink relay subframe and the uplink relay subframe correspond to TDD uplink/downlink configuration 3, the ratio of the downlink relay subframe to the uplink relay subframe is 1:1, the method further comprises:

if the uplink relay subframe is subframe 3 and the downlink relay subframe is subframe 7, the relay device receives the R-ULgrant at subframe n and sends an R-PUSCH at subframe n + K, wherein n is 7 and K is 6; and/or the relay equipment receives the R-PDSCH on a subframe n-K, and sends ACK/NACK corresponding to the R-PDSCH on the subframe n, wherein n is 3, and K is 6;

if the uplink relay subframe is subframe 3 and the downlink relay subframe is subframe 8, the relay device receives the R-ULgrant at subframe n and sends an R-PUSCH (physical uplink shared channel) at subframe n + K, wherein n is 8 and K is 5; and/or the relay equipment receives the R-PDSCH on a subframe n-K, and sends ACK/NACK corresponding to the R-PDSCH on the subframe n, wherein n is 3, and K is 5;

if the uplink relay subframe is subframe 4 and the downlink relay subframe is subframe 9, the relay device receives the R-ULgrant at subframe n and sends an R-PUSCH at subframe n + K, wherein n is 9 and K is 5; and/or the relay equipment receives the R-PDSCH on a subframe n-K, and sends ACK/NACK corresponding to the R-PDSCH on the subframe n, wherein n is 4, and K is 5.

6. The method of claim 1, wherein if the downlink relay subframe and the uplink relay subframe correspond to TDD uplink and downlink configuration 3, the ratio of the downlink relay subframe to the uplink relay subframe is 2:1, the uplink relay subframe is subframe 3, and the downlink relay subframes are subframes 7 and 8, then the method further includes:

the relay equipment receives the R-UL grant at a subframe n and sends an R-PUSCH at a subframe n + K, wherein n is 8 and K is 5; and/or the presence of a gas in the gas,

the relay equipment receives the R-PDSCH on a subframe n-K, and sends ACK/NACK corresponding to the R-PDSCH on the subframe n, wherein n is 3, and K is 5 or 6.

7. The method of claim 1, wherein if the downlink relay subframe and the uplink relay subframe correspond to TDD uplink and downlink configuration 3, the ratio of the downlink relay subframe to the uplink relay subframe is 2:2, the method further comprises:

if the uplink relay subframe is subframes 3 and 4 and the downlink relay subframe is subframes 7 and 8, the relay device receives the R-ULgrant at subframe n and sends the R-PUSCH at subframe n + K, wherein n is 7 or 8 and K is 6; and/or the relay equipment receives the R-PDSCH on a subframe n-K, and sends ACK/NACK corresponding to the R-PDSCH on the subframe n, wherein n is 3 or 4, and K is 6;

if the uplink relay subframe is subframes 3 and 4, and the downlink relay subframe is subframes 7 and 9, the relay device receives the R-ULgrant at subframe n and sends the R-PUSCH at subframe n + K, at this time, n is 7 or 9, if n is 7, K is 6, and if n is 9, K is 5; and/or the relay equipment receives the R-PDSCH on a subframe n-K, and sends ACK/NACK corresponding to the R-PDSCH on the subframe n, wherein n is 3 or 4, if n is 3, K is 6, and if n is 4, K is 5; or,

if the uplink relay subframe is subframes 3 and 4 and the downlink relay subframe is subframes 8 and 9, the relay device receives the R-ULgrant at subframe n and sends the R-PUSCH at subframe n + K, wherein n is 8 or 9, and K is 5; and/or the relay equipment receives the R-PDSCH on a subframe n-K, and sends ACK/NACK corresponding to the R-PDSCH on the subframe n, wherein n is 3 or 4, and K is 5.

8. The method of claim 1, wherein if the downlink relay subframe and the uplink relay subframe correspond to TDD uplink and downlink configuration 3, the ratio of the downlink relay subframe to the uplink relay subframe is 3:2, the uplink relay subframes are subframes 3 and 4, and the downlink relay subframes are subframes 7, 8, and 9, then the method further includes:

the relay equipment receives the R-UL grant at a subframe n and sends an R-PUSCH at a subframe n + K, wherein n is 8 or 9, and K is 5; and/or the presence of a gas in the gas,

the relay equipment receives the R-PDSCH on a subframe n-K, and sends ACK/NACK corresponding to the R-PDSCH on the subframe n, wherein n is 3 or 4, if n is 3, K is 6 or 5, and if n is 4, K is 5.

9. The method of claim 1, wherein if the downlink relay subframe and the uplink relay subframe correspond to TDD uplink/downlink configuration 3, the downlink relay subframe and the uplink relay subframe are displayed by the following entries:

wherein, D is a downlink subframe, U is an uplink subframe, the numbers 0, 1, 2 corresponding to the backhaul configuration in the table entry are only one identifier, and the identifier has an arbitrary corresponding relationship with the uplink relay subframe and the downlink relay subframe in the table entry; for each backhaul configuration, if D below the backhaul configuration corresponds to a flag √ denotes that D is a downlink relay subframe under the backhaul configuration, and U corresponds to a flag √ denotes that U is an uplink relay subframe under the backhaul configuration, the method further includes:

when the relay device receives the R-UL grant at the subframe 8 or 9, searching the K value corresponding to the subframe 8 or 9 in the following table entry according to the received backhaul configuration number,

then, transmitting R-PUSCH on subframe 8+ K or 9+ K;

and/or, when the relay equipment receives the R-PDSCH on the subframe n-K, the corresponding ACK/NACK is sent on the subframe n, at the moment, n is 3 or 4, and the K value is set in the following table entry by the relay equipment according to the received backhaul configuration number

To find.

10. The method of claim 1, wherein if the downlink relay subframe and the uplink relay subframe correspond to TDD uplink/downlink configuration 3, the downlink relay subframe and the uplink relay subframe are displayed by the following entries:

then, sending R-PUSCH on subframe 8+ K or 9+ K; and/or the presence of a gas in the gas,

when the relay equipment receives the R-PDSCH on a subframe n-K, corresponding ACK/NACK is sent on the subframe n, at the moment, n is 3 or 4, and the value of K is in the following table entry by the relay equipment according to the received backhaul configuration number

To find.

11. The method of claim 1, wherein if the downlink relay subframe and the uplink relay subframe correspond to TDD uplink/downlink configuration 3, the downlink relay subframe and the uplink relay subframe are displayed by the following entries:

wherein, D is a downlink subframe, U is an uplink subframe, the number 0, 1, 2, 3, 4 corresponding to the backhaul configuration in the table entry is only one identifier, and the identifier has an arbitrary corresponding relationship with the uplink relay subframe and the downlink relay subframe in the table entry; for each backhaul configuration, if D below the backhaul configuration corresponds to a flag √ denotes that D is a downlink relay subframe under the backhaul configuration, and U corresponds to a flag √ denotes that U is an uplink relay subframe under the backhaul configuration, the method further includes:

when the relay device receives the R-UL grant at the subframe 8 or 9, searching a K value corresponding to the subframe 8 or 9 in the following table entry according to the received backhaul configuration number;

then, transmitting R-PUSCH on subframe 8+ K or 9+ K; and/or the presence of a gas in the gas,

when the relay equipment receives the R-PDSCH on a subframe n-K, corresponding ACK/NACK is sent on the subframe n, at the moment, n is 3 or 4, and the K value is set in the following table entry by the relay equipment according to the received backhaul configuration number

To find.