CN102237927B - Information on access link sends and response feedback method, system and equipment - Google Patents

Information on access link sends and response feedback method, system and equipment Download PDF

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Publication number
CN102237927B
CN102237927B CN201010159817.5A CN201010159817A CN102237927B CN 102237927 B CN102237927 B CN 102237927B CN 201010159817 A CN201010159817 A CN 201010159817A CN 102237927 B CN102237927 B CN 102237927B
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China
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frame
ack
sub
uplink
nack
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CN201010159817.5A
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Chinese (zh)
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CN102237927A (en
Inventor
张文健
潘学明
沈祖康
肖国军
王立波
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电信科学技术研究院
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Abstract

The information that the invention discloses on a kind of access link sends and response feedback method, system and equipment, for improving the transmission performance of access link.In the present invention, terminal the back haul link sent according to via node RN sub-frame of uplink configuration information or whether carry out the indication information of answering/no answering ACK/NACK feedback, determine not in the sub-frame of uplink determined according to existing feedback timing relationship after feeding back ACK/NACK, stop the feedback of ACK/NACK information, or at the available upstream subframe feeding back ACK/nack message except this sub-frame of uplink, the transmission performance of access link effectively can be improved.

Description

Information on access link sends and response feedback method, system and equipment

Technical field

The present invention relates to wireless communication field, the information particularly related on access link sends and response feedback method, system and equipment.

Background technology

In long-term evolution upgrading (LTE-Advanced) system, adopt the method for via node (RelayNode, RN) cooperation transmission can improve service quality and the Extended Cell covering of Cell Edge User.Based on via node lte-a system as shown in Figure 1.

The introducing of via node makes the wireless link based on the mobile communication system of Relay have three: the direct projection link (directlink) between base station (eNB) and grand terminal (macroUE), back haul link (backhaullink) between eNB and RN and the access link (accesslink) between RN and link terminal (relayUE), consider the signal disturbing restriction of radio communication, three links need to use orthogonal Radio Resource.Transceiver due to via node is time division duplex (TDD) mode of operation, backhaul link and access link are take different time slots in tdd frame structure, but direct link and backhaul link are can be coexistent, as long as its running time-frequency resource is orthogonal.

It is as follows that TDD system downlink transfer and up answering/no answering (ACK/NACK) feed back timing relationship:

For TDD system, the ACK/NACK information that UE feeds back in sub-frame of uplink n is Physical Downlink Shared Channel (PhysicalDownlinkSharedChannel on subframe n-k, PDSCH) testing result of (PDSCH), wherein k ∈ K, K value is as shown in table 1.

Table 1:TDD system descending index K:{k 0, k 1... k m-1}

Major part for TDD system configures, and the number of sub-frame of uplink is less than the number of descending sub frame, and the ACK/NACK that the PDSCH therefore in multiple descending sub frame is corresponding will transmit in same sub-frame of uplink.

When TDD system supports that relaying is disposed, descending sub frame (the #0 of via node, #1, #5, downlink subframes in return link #6) can not be configured to or not be configured to downlink subframes in return link according to the some other subframe of transmission quantity, then these subframes can only be used for the downlink transfer of access link, when the sub-frame of uplink that these subframes are corresponding is configured to back haul link sub-frame of uplink, even if relayUE sends ACK/NACK corresponding to these subframes, relaying also cannot receive uplink ACK/NACK, thus cannot judge whether receiving terminal receives correct, affect the transmission performance of access link.

As the example of Fig. 2, for the configuration 2 in TDD system, according to the timing relationship of table 1 specification, ACK/NACK corresponding to the PDSCH transmission in descending sub frame (#4, #5, #6, #8) transmits at sub-frame of uplink #2, if sub-frame of uplink #2 is configured to back haul link sub-frame of uplink, subframe (#4, #5, #6) is for the downlink transfer of access link, then via node cannot receive ACK/NACK corresponding to subframe (#4, #5, #6) interior PDSCH.

Realizing in process of the present invention, inventor finds to there is following technical problem in prior art:

According to above-mentioned analysis, based in the TDD system of via node, UE feeds back timing relationship according to the downlink transfer shown in above-mentioned table 1 and uplink ACK/NACK, during the ACK/NACK information that in feeding back downlink subframe, PDSCH is corresponding in sub-frame of uplink, if this sub-frame of uplink is the sub-frame of uplink on back haul link, then RN cannot receive the ACK/NACK information that UE feeds back in this sub-frame of uplink, the feedback of ACK/NACK information causes the waste of transfer resource, and RN cannot judge the whether correct downlink data receiving of UE, and then have impact on the transmission performance of access link.

Summary of the invention

The embodiment of the present invention provides a kind of based on the method for sending information on access link in the TDD system of relaying and a kind of via node, how to obtain problem for determining whether to carry out ACK/NACK feedack in sub-frame of uplink for solving terminal.

Based on the method for sending information on access link in the TDD system of relaying, the method comprises:

RN obtains the sub-frame of uplink configuration information of back haul link, or generates the indication information whether terminal carries out ACK/NACK feedback;

Described sub-frame of uplink configuration information or described indication information are sent to terminal by RN, whether in sub-frame of uplink, carry out ACK/NACK feedback with indicating terminal.

A kind of via node, this via node comprises:

Information generating unit, for obtaining the sub-frame of uplink configuration information of back haul link, or generates the indication information whether terminal carries out ACK/NACK feedback;

Whether information transmitting unit, for described sub-frame of uplink configuration information or described indication information are sent to terminal, carry out ACK/NACK feedback with indicating terminal in sub-frame of uplink.

In this programme, RN determines whether to carry out the sub-frame of uplink configuration information of ACK/NACK feedback in sub-frame of uplink or indication information sends to terminal by being used for terminal, and then solves terminal and how to obtain problem for determining whether to carry out ACK/NACK feedack in sub-frame of uplink.

The embodiment of the present invention also provides a kind of based on the response feedback method on access link in the TDD system of relaying, a kind of terminal and a kind of wireless communication system, for improving the transmission performance of access link.

Based on the response feedback method on access link in the TDD system of relaying, the method comprises:

After terminal receives downlink data packet on descending sub frame, feed back timing relationship according to downlink transfer in the TDD system preset and uplink ACK/NACK, determine sending the sub-frame of uplink that ACK/NACK feedback information corresponding to described downlink data packet uses;

Whether terminal carries out the indication information of ACK/NACK feedback or the sub-frame of uplink configuration information of back haul link according to what receive, determines whether in described sub-frame of uplink, feed back described ACK/NACK information;

Terminal, when determining not feed back described ACK/NACK information in described sub-frame of uplink, stops the feedback of ACK/NACK information; Or, choose the available upstream subframe except described sub-frame of uplink, and feed back described ACK/NACK information to RN in the sub-frame of uplink chosen; Described available upstream subframe is the subframe of the sub-frame of uplink not being configured to back haul link.

A kind of terminal, this terminal comprises:

Subframe determining unit, after receive downlink data packet on descending sub frame, feed back timing relationship according to downlink transfer in the TDD system preset and uplink ACK/NACK, determine sending the sub-frame of uplink that ACK/NACK feedback information corresponding to described downlink data packet uses;

Feedback determination unit, for whether carrying out the indication information of ACK/NACK feedback or the sub-frame of uplink configuration information of back haul link according to what receive, determines whether in described sub-frame of uplink, feed back described ACK/NACK information;

Feedback processing unit, during for determining at described feedback determination unit not feed back described ACK/NACK information in described sub-frame of uplink, stops the feedback of ACK/NACK information; Or, choose the available upstream subframe except described sub-frame of uplink, and feed back described ACK/NACK information to RN in the sub-frame of uplink chosen; Described available upstream subframe is the subframe of the sub-frame of uplink not being configured to back haul link.

A kind of wireless communication system, this system comprises:

Via node, for obtaining the sub-frame of uplink configuration information of back haul link, or generates the indication information whether terminal carries out ACK/NACK feedback; Described sub-frame of uplink configuration information or described indication information are sent to terminal;

Terminal, after receive downlink data packet on descending sub frame, feeds back timing relationship according to the downlink transfer preset and uplink ACK/NACK, determines sending the sub-frame of uplink that ACK/NACK feedback information corresponding to described downlink data packet uses; According to described sub-frame of uplink configuration information or described indication information, determine whether in described sub-frame of uplink, feed back described ACK/NACK information;

When determining not feed back described ACK/NACK information in described sub-frame of uplink, stop the feedback of ACK/NACK information; Or, choose the available upstream subframe except described sub-frame of uplink, and feed back described ACK/NACK information to RN in the sub-frame of uplink chosen; Described available upstream subframe is the subframe of the sub-frame of uplink not being configured to back haul link.

In this programme, terminal the back haul link sent according to RN sub-frame of uplink configuration information or whether carry out the indication information of ACK/NACK feedback, determine not in the sub-frame of uplink determined according to existing feedback timing relationship after feeding back ACK/NACK, stop the feedback of ACK/NACK information, avoid terminal and transmit the transmission resource waste that useless ACK/NACK information causes.

Terminal the back haul link sent according to RN sub-frame of uplink configuration information or whether carry out the indication information of ACK/NACK feedback, determine not in the sub-frame of uplink determined according to existing feedback timing relationship after feeding back ACK/NACK, at the available upstream subframe feeding back ACK/nack message except this sub-frame of uplink, due to the subframe that this available upstream subframe is the sub-frame of uplink not being configured to back haul link, RN can receive the ACK/NACK information that terminal sends, and then can judge the whether correct downlink data receiving of terminal.

Visible, adopt the present invention, effectively can improve the transmission performance of access link.

Accompanying drawing explanation

Fig. 1 is lte-a system schematic diagram of the prior art;

Fig. 2 is the backhaul link subframe configuration schematic diagram of TDD configuration 2 in prior art;

The method flow schematic diagram that Fig. 3 provides for the embodiment of the present invention;

Fig. 4 is the subframe timing relation schematic diagram of the embodiment of the present invention one and two;

The system configuration schematic diagram that Fig. 5 provides for the embodiment of the present invention;

The RN structural representation that Fig. 6 provides for the embodiment of the present invention;

The terminal structure schematic diagram that Fig. 7 provides for the embodiment of the present invention.

Embodiment

In order to improve the transmission performance of access link, the embodiment of the present invention provides a kind of and sends and response feedback method based on the information on access link in the TDD system of relaying, in this method, the indication information whether the sub-frame of uplink configuration information of back haul link or terminal carry out ACK/NACK feedback is sent to terminal by via node, and terminal determines whether to carry out ACK/NACK feedback in the sub-frame of uplink of correspondence according to the information received.

See Fig. 3, what the embodiment of the present invention provided sends and response feedback method based on the information on access link in the TDD system of relaying, specifically comprises the following steps:

Step 30:RN obtains the sub-frame of uplink configuration information of back haul link, or generates the indication information whether terminal carries out ACK/NACK feedback; Here, the sub-frame of uplink configuration information of back haul link can comprise the sub-frame information of the sub-frame of uplink being configured to back haul link;

The indication information of the sub-frame of uplink configuration information got or generation is sent to terminal by step 31:RN, determines whether to carry out ACK/NACK feedback in sub-frame of uplink according to this indication information or sub-frame of uplink configuration information with indicating terminal; This sub-frame of uplink is that terminal feeds back timing relationship (i.e. the table 1 of background technology part) according to downlink transfer in the TDD system preset and uplink ACK/NACK, determine for being sent in the sub-frame of uplink that ACK/NACK feedback information corresponding to the downlink data packet that receives in descending sub frame uses;

Step 32: after terminal receives downlink data packet on descending sub frame, feed back timing relationship according to downlink transfer in the TDD system preset and up answering/no answering ACK/NACK, determine sending the sub-frame of uplink that ACK/NACK feedback information corresponding to this downlink data packet uses;

Step 33: whether terminal carries out the indication information of ACK/NACK feedback or the sub-frame of uplink configuration information of back haul link according to what receive, determines whether feeding back ACK/nack message in described sub-frame of uplink;

Step 34: terminal is being determined during feeding back ACK/nack message, not stop the feedback of ACK/NACK information in described sub-frame of uplink; Or, choose the available upstream subframe except this sub-frame of uplink, and to RN feeding back ACK/nack message in the sub-frame of uplink chosen; This available upstream subframe is the sub-frame of uplink of the sub-frame of uplink not being configured to back haul link.Determining in sub-frame of uplink, when feeding back ACK/nack message, not stop the feedback of ACK/NACK information; Or, feeding back ACK/nack message in other available upstream subframes.

As the first embodiment:

In RN side:

In step 30, RN generates the indication information whether terminal carries out ACK/NACK feedback, and its specific implementation can be as follows:

RN is after determining to need to send downlink data packet by descending sub frame to terminal, feeding back timing relationship according to downlink transfer in the TDD system preset and uplink ACK/NACK, determining the sub-frame of uplink that terminal uses for sending ACK/NACK feedback information corresponding to this downlink data packet;

RN determines whether this sub-frame of uplink is configured to the sub-frame of uplink of back haul link, if so, then generates the indication information that terminal does not carry out ACK/NACK feedback, otherwise, generate the indication information that terminal carries out ACK/NACK feedback.

When RN can send downlink data packet to terminal in descending sub frame, the indication information whether terminal being carried out ACK/NACK feedback is carried in Downlink Control Information (DCI), and this DCI is sent to terminal.Namely carry the DCI of indication information and downlink data to wrap in same descending sub frame and send to terminal.

Accordingly, in end side:

In step 33, terminal is according to the indication information whether carrying out ACK/NACK feedback received, and determine whether in sub-frame of uplink, feed back described ACK/NACK information, its specific implementation can be as follows:

If the indication information received is the indication information carrying out ACK/NACK feedback, then determine feeding back ACK/nack message in sub-frame of uplink;

If the indication information received is the indication information not carrying out ACK/NACK feedback, then determine not feeding back ACK/nack message in sub-frame of uplink.

As the second embodiment:

In RN side:

The sub-frame of uplink configuration information of back haul link can be sent to terminal by broadcast or high-level signaling etc. by RN.

Accordingly, in end side:

In step 33, terminal is according to the sub-frame of uplink configuration information of the back haul link received, and determine whether feeding back ACK/nack message in sub-frame of uplink, its specific implementation can be as follows:

Terminal is according to the sub-frame of uplink configuration information of the back haul link received, whether the sub-frame of uplink determined in determining step 32 is configured to the sub-frame of uplink of back haul link, if, then determine feeding back ACK/nack message in this sub-frame of uplink, otherwise, determine not feeding back ACK/nack message in this sub-frame of uplink.

In the above two embodiments, in step 34, terminal chooses the available upstream subframe except the sub-frame of uplink determined in step 32, and its body realizes adopting following three kinds of modes:

The first, first after the sub-frame of uplink determined in terminal selecting step 32 sub-frame of uplink not being configured to back haul link sub-frame of uplink, using the sub-frame of uplink chosen as available upstream subframe;

When adopting this method, for the first embodiment above-mentioned, the sub-frame of uplink configuration information on back haul link can be sent to terminal by RN or other network equipments, or namely solidifies pre-configured for the sub-frame of uplink configuration information on back haul link in the terminal.Terminal is not configured to the subframe of back haul link sub-frame of uplink as available upstream subframe according to first after the sub-frame of uplink determined in this information selecting step 32;

For above-mentioned the second embodiment, the sub-frame of uplink configuration information on the back haul link that terminal is directly sent according to RN, first after the sub-frame of uplink determined in selecting step 32 subframe not being configured to back haul link sub-frame of uplink is as available upstream subframe.

The second, first sub-frame of uplink after the sub-frame of uplink determined in terminal selecting step 32, using the sub-frame of uplink chosen as available upstream subframe;

When adopting this method, according to the sub-frame configuration in existing TDD system, first sub-frame of uplink after the sub-frame of uplink determined in step 32 is not generally configured to the sub-frame of uplink on back haul link.

The third, terminal chooses the sub-frame of uplink not being configured to back haul link sub-frame of uplink preset, using the sub-frame of uplink chosen as available upstream subframe.

When adopting this method, namely can solidify pre-configured for the sub-frame information of the sub-frame of uplink be not configured on back haul link in the terminal, terminal chooses the subframe of this configuration as available upstream subframe; Or, terminal feeds back timing relationship according to the new downlink transfer of arranging with RN side and uplink ACK/NACK, determining the sub-frame of uplink that the ACK/NACK information corresponding to downlink data packet that feedback receives on descending sub frame uses, only need ensure that the sub-frame of uplink of the transferring ACK/NACK determined according to this feedback timing relationship is not configured to back haul link sub-frame of uplink when configuring feedback timing relationship.

Before sub-frame of uplink configuration information or indication information are sent to terminal by RN in step 30, RN can send communication node type indication information by broadcast or high-level signaling to terminal, with the current communication node of indicating terminal for RN.Accordingly, after terminal is RN according to this node type indication information determination present communication node received, just perform step 33 and subsequent step.If terminal can not be RN according to this node type indication information determination present communication node received, then feeding back ACK/nack message in the sub-frame of uplink conventionally directly determined in the step 32.

Below the present invention is specifically described:

In a tdd system, base station and via node send the node type indication information of 1 bit (bit) to user terminal, or via node sends this indication information to user terminal separately, for making point base station, user termination environment and via node.This indication information is invalid for version 8 user terminal, and version 10 user terminal can identify this indication information.This indication information is sent to user terminal by broadcast.

If according to indication information, user terminal judges that communication node is base station, then the two proper communication, does not do any special processing.If but according to indication information, user terminal judges that communication node is via node, then can carry out the following two kinds process:

Mode 1: the sub-frame of uplink configuration information of back haul link is sent to user terminal by broadcast or high-level signaling etc. by via node, user terminal does not send uplink ACK/NACK in the sub-frame of uplink position of back haul link, to avoid causing interference, or transfer to needing the ACK/NACK sent in the sub-frame of uplink of back haul link in the available sub-frame of uplink of after this subframe first and send, or transfer in predetermined available upstream subframe and send.

Mode 2: via node in the descending sub frame of access link to user terminal transmitting downlink data by descending scheduling time, in the DCI that user terminal is corresponding, add the indication information of 1bit, be used to indicate user terminal and whether send uplink ACK/NACK in corresponding sub-frame of uplink.This indication information is UE exclusive (UE-specific), only adds in the DCI that version 10 user terminal is corresponding.Version 10 user terminal judges whether to send ACK/NACK in corresponding sub-frame of uplink according to indication information, if do not require to send, then version 10 user terminal does not send ACK/NACK in the sub-frame of uplink corresponding with descending sub frame, to avoid causing interference, or transfer to needing the ACK/NACK sent in the sub-frame of uplink of back haul link in the available sub-frame of uplink of after this subframe first and send, or transfer in predetermined available upstream subframe and send.

In addition, base station and via node also can not send communication node type indication information by broadcast, but in the DCI of base station and via node, all add the indication information of 1bit, be used to indicate user terminal and whether send uplink ACK/NACK in corresponding sub-frame of uplink.This indication information is UE-specific's, only adds in the DCI that version 10 user terminal is corresponding.In general, the indication information that base station sends requires to send ACK/NACK all the time, and the indication information of via node may require send or do not send ACK/NACK.Version 10 user terminal judges whether to send ACK/NACK in corresponding sub-frame of uplink according to indication information, if require to send, version 10 user terminal then sends uplink ACK/NACK in corresponding sub-frame of uplink; If do not require to send, then version 10 user terminal does not send ACK/NACK in the sub-frame of uplink corresponding with descending sub frame, to avoid causing interference, or transfer to needing the ACK/NACK sent in the sub-frame of uplink of back haul link in the available sub-frame of uplink of after this subframe first and send, or transfer in predetermined available upstream subframe and send.

Embodiment one:

Step S01: via node sends downlink data packet and Downlink Control Information (DCI) at descending sub frame 4 to user terminal, according to the descending HARQ timing relationship of the Rel-8 shown in table 1, determine that terminal needs to send the ACK/NACK of corresponding descending sub frame 4 in sub-frame of uplink 2, but sub-frame of uplink 2 is assigned to the sub-frame of uplink of back haul link, even if user terminal sends ACK/NACK at sub-frame of uplink 2, via node also cannot receive, in DCI, therefore carry the indication information not carrying out ACK/NACK feedback;

Step S02: after user terminal receives downlink data packet, according to the descending HARQ timing relationship of the Rel-8 shown in table 1, determines to need to send ACK/NACK in sub-frame of uplink 2;

Step S03: user terminal is determined not send ACK/NACK in sub-frame of uplink 2 according to the indication information in DCI, and does not send the ACK/NACK of corresponding descending sub frame 4 in all sub-frame of uplink; Or in first available upstream subframe 7 after sub-frame of uplink 2, send uplink ACK/NACK feedback of corresponding descending sub frame 4, as shown in Figure 4; Or can send in other predetermined available upstream subframes.

Embodiment two:

Step S11: via node sends the sub-frame of uplink configuration information of back haul link to user terminal by broadcast;

Step S12: via node sends downlink data packet at descending sub frame 4 to user terminal;

Step S13: after user terminal receives downlink data packet, according to the descending HARQ timing relationship of the Rel-8 shown in table 1, determines to need to send ACK/NACK in sub-frame of uplink 2;

Step S14: user terminal is according to the sub-frame of uplink configuration information of the back haul link received, know that sub-frame of uplink 2 is assigned to the sub-frame of uplink of back haul link, even if user terminal sends ACK/NACK at sub-frame of uplink 2, via node also cannot receive, therefore determine in sub-frame of uplink 2, not send ACK/NACK, and in all sub-frame of uplink, do not send the ACK/NACK of corresponding descending sub frame 4; Or in first available upstream subframe 7 after sub-frame of uplink 2, send uplink ACK/NACK feedback of corresponding descending sub frame 4, as shown in Figure 4; Or can send in other predetermined available upstream subframes.

See Fig. 5, the embodiment of the present invention also provides a kind of wireless communication system, and this system comprises:

Via node 50, for obtaining the sub-frame of uplink configuration information of back haul link, or generates the indication information whether terminal carries out answering/no answering ACK/NACK feedback; Described sub-frame of uplink configuration information or described indication information are sent to terminal;

Terminal 51, after receive downlink data packet on descending sub frame, feeds back timing relationship according to the downlink transfer preset and uplink ACK/NACK, determines sending the sub-frame of uplink that ACK/NACK feedback information corresponding to described downlink data packet uses; According to described sub-frame of uplink configuration information or described indication information, determine whether in described sub-frame of uplink, feed back described ACK/NACK information;

When determining not feed back described ACK/NACK information in described sub-frame of uplink, stop the feedback of ACK/NACK information; Or, choose the available upstream subframe except described sub-frame of uplink, and feed back described ACK/NACK information to via node RN in the sub-frame of uplink chosen; Described available upstream subframe is the subframe of the sub-frame of uplink not being configured to back haul link.

Described via node 50 for:

After determining to need to send downlink data packet by descending sub frame to terminal, feeding back timing relationship according to the downlink transfer preset and uplink ACK/NACK, determining the sub-frame of uplink that terminal uses for sending ACK/NACK feedback information corresponding to described downlink data packet; Determine whether described sub-frame of uplink is configured to the sub-frame of uplink of back haul link, if so, then generate the indication information that terminal does not carry out ACK/NACK feedback, otherwise, generate the indication information that terminal carries out ACK/NACK feedback;

Accordingly, described terminal 51 for:

When described indication information is the indication information carrying out ACK/NACK feedback, determine in described sub-frame of uplink, feed back described ACK/NACK information;

When described indication information is the indication information not carrying out ACK/NACK feedback, determine in described sub-frame of uplink, not feed back described ACK/NACK information.

Described terminal 51 for:

According to the sub-frame of uplink configuration information of the back haul link received, judge whether described sub-frame of uplink is configured to the sub-frame of uplink of back haul link, if, then determine in described sub-frame of uplink, feed back described ACK/NACK information, otherwise, determine in described sub-frame of uplink, not feed back described ACK/NACK information.

See Fig. 6, the embodiment of the present invention also provides a kind of via node, and this via node comprises:

Information generating unit 60, for obtaining the sub-frame of uplink configuration information of back haul link, or generates the indication information whether terminal carries out answering/no answering ACK/NACK feedback;

Information transmitting unit 61, for described sub-frame of uplink configuration information or described indication information are sent to terminal, determines whether to carry out ACK/NACK feedback in sub-frame of uplink according to described indication information or sub-frame of uplink configuration information with indicating terminal; Described sub-frame of uplink is that terminal feeds back timing relationship according to downlink transfer in the TDD system preset and uplink ACK/NACK, determine for being sent in the sub-frame of uplink that ACK/NACK feedback information corresponding to downlink data packet that descending sub frame receives uses.

Described information generating unit 60 for:

After determining to need to send downlink data packet by descending sub frame to terminal, feeding back timing relationship according to downlink transfer in the TDD system preset and uplink ACK/NACK, determining the sub-frame of uplink that terminal uses for sending ACK/NACK feedback information corresponding to described downlink data packet;

Determine whether described sub-frame of uplink is configured to the sub-frame of uplink of back haul link, if so, then generate the indication information that terminal does not carry out ACK/NACK feedback, otherwise, generate the indication information that terminal carries out ACK/NACK feedback.

Described information transmitting unit 61 for:

When sending described downlink data packet to terminal in described descending sub frame, described indication information is carried in Downlink Control Information DCI, and this DCI is sent to terminal.

Described information transmitting unit 61 for:

By broadcast or high-level signaling, the sub-frame of uplink configuration information of described back haul link is sent to terminal.

Described information transmitting unit 61 also for:

Before described sub-frame of uplink configuration information or described indication information are sent to terminal by described information transmitting unit, send communication node type indication information, with indicating terminal present communication node for RN by broadcast or high-level signaling to terminal.

See Fig. 7, the embodiment of the present invention also provides a kind of terminal, and this terminal comprises:

Subframe determining unit 70, after receive downlink data packet on descending sub frame, feed back timing relationship according to downlink transfer in the TDD system preset and up answering/no answering ACK/NACK, determine sending the sub-frame of uplink that ACK/NACK feedback information corresponding to described downlink data packet uses;

Feedback determination unit 71, for whether carrying out the indication information of ACK/NACK feedback or the sub-frame of uplink configuration information of back haul link according to what receive, determines whether in described sub-frame of uplink, feed back described ACK/NACK information;

Feedback processing unit 72, during for determining at described feedback determination unit not feed back described ACK/NACK information in described sub-frame of uplink, stops the feedback of ACK/NACK information; Or, choose the available upstream subframe except described sub-frame of uplink, and feed back described ACK/NACK information to via node RN in the sub-frame of uplink chosen; Described available upstream subframe is the subframe of the sub-frame of uplink not being configured to back haul link.

Described feedback determination unit 71 for:

According to the sub-frame of uplink configuration information of the back haul link received, judge whether described sub-frame of uplink is configured to the sub-frame of uplink of back haul link, if, then determine in described sub-frame of uplink, feed back described ACK/NACK information, otherwise, determine in described sub-frame of uplink, not feed back described ACK/NACK information.

Described feedback determination unit 71 for:

If receive the indication information carrying out ACK/NACK feedback, then determine in described sub-frame of uplink, feed back described ACK/NACK information;

If receive the indication information not carrying out ACK/NACK feedback, then determine in described sub-frame of uplink, not feed back described ACK/NACK information.

Described feedback processing unit 72 for:

First of choosing after described sub-frame of uplink is not configured to the sub-frame of uplink of back haul link sub-frame of uplink, using the sub-frame of uplink chosen as available upstream subframe; Or,

Choose first sub-frame of uplink after described sub-frame of uplink, using the sub-frame of uplink chosen as available upstream subframe; Or,

Choose the sub-frame of uplink not being configured to back haul link sub-frame of uplink preset, using the sub-frame of uplink chosen as available upstream subframe.

This terminal comprises further:

Communication node type determining units 73, for receiving the node type indication information that RN is sent by broadcast or high-level signaling, is RN according to this node type indication information determination present communication node.

To sum up, beneficial effect of the present invention comprises:

In the scheme that the embodiment of the present invention provides, terminal the back haul link sent according to RN sub-frame of uplink configuration information or whether carry out the indication information of ACK/NACK feedback, determine not in the sub-frame of uplink determined according to existing feedback timing relationship after feeding back ACK/NACK, stop the feedback of ACK/NACK information, avoid terminal and transmit the transmission resource waste that useless ACK/NACK information causes.

Terminal the back haul link sent according to RN sub-frame of uplink configuration information or whether carry out the indication information of ACK/NACK feedback, determine not in the sub-frame of uplink determined according to existing feedback timing relationship after feeding back ACK/NACK, at the available upstream subframe feeding back ACK/nack message except this sub-frame of uplink, due to the subframe that this available upstream subframe is the sub-frame of uplink not being configured to back haul link, RN can receive the ACK/NACK information that terminal sends, and then can judge the whether correct downlink data receiving of terminal.

Visible, adopt the present invention, effectively can improve the transmission performance of access link in the TDD system based on relaying.

Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.

Claims (9)

1. based on the method for sending information on access link in the TDD system of relaying, it is characterized in that, the method comprises:
Via node RN generates the indication information whether terminal carries out answering/no answering ACK/NACK feedback;
Described indication information is sent to terminal by RN, whether in sub-frame of uplink, carries out ACK/NACK feedback with indicating terminal;
Wherein, the indication information whether described generation terminal carries out answering/no answering ACK/NACK feedback comprises: RN is after determining to need to send downlink data packet by descending sub frame to terminal, feeding back timing relationship according to downlink transfer in the TDD system preset and uplink ACK/NACK, determining the sub-frame of uplink that terminal uses for sending ACK/NACK feedback information corresponding to described downlink data packet; RN determines whether described sub-frame of uplink is configured to the sub-frame of uplink of back haul link, if so, then generates the indication information that terminal does not carry out ACK/NACK feedback, otherwise, generate the indication information that terminal carries out ACK/NACK feedback;
Described indication information sends to terminal to comprise by described RN: when RN sends described downlink data packet to terminal in described descending sub frame, is carried in Downlink Control Information DCI by described indication information, and this DCI is sent to terminal.
2. the method for claim 1, is characterized in that, before described indication information is sent to terminal by RN, the method comprises further:
RN sends communication node type indication information, with indicating terminal present communication node for RN by broadcast or high-level signaling to terminal.
3., based on the response feedback method on access link in the TDD system of relaying, it is characterized in that, the method comprises:
After terminal receives downlink data packet on descending sub frame, feed back timing relationship according to downlink transfer in the TDD system preset and up answering/no answering ACK/NACK, determine sending the sub-frame of uplink that ACK/NACK feedback information corresponding to described downlink data packet uses;
Terminal, according to the indication information whether carrying out ACK/NACK feedback received, determines whether in described sub-frame of uplink, feed back described ACK/NACK information;
Terminal, when determining not feed back described ACK/NACK information in described sub-frame of uplink, stops the feedback of ACK/NACK information; Or, choose the available upstream subframe except described sub-frame of uplink, and feed back described ACK/NACK information to via node RN in the sub-frame of uplink chosen; Described available upstream subframe is the subframe of the sub-frame of uplink not being configured to back haul link;
Wherein, described terminal is according to the indication information whether carrying out ACK/NACK feedback received, determine whether that in described sub-frame of uplink, feed back described ACK/NACK information comprises: if described indication information is the indication information carrying out ACK/NACK feedback, then determine in described sub-frame of uplink, feed back described ACK/NACK information; If described indication information is the indication information not carrying out ACK/NACK feedback, then determine in described sub-frame of uplink, not feed back described ACK/NACK information.
4. method as claimed in claim 3, it is characterized in that, before determining whether to feed back described ACK/NACK information in described sub-frame of uplink, the method comprises further:
Terminal receives the node type indication information that RN is sent by broadcast or high-level signaling, is RN according to this node type indication information determination present communication node.
5. a via node, is characterized in that, this via node comprises:
Whether information generating unit, carry out the indication information of answering/no answering ACK/NACK feedback for generating terminal;
Whether information transmitting unit, for described indication information is sent to terminal, carry out ACK/NACK feedback with indicating terminal in sub-frame of uplink;
Wherein, described information generating unit specifically for: after determining to need to send downlink data packet by descending sub frame to terminal, feeding back timing relationship according to downlink transfer in the TDD system preset and uplink ACK/NACK, determining the sub-frame of uplink that terminal uses for sending ACK/NACK feedback information corresponding to described downlink data packet; Determine whether described sub-frame of uplink is configured to the sub-frame of uplink of back haul link, if so, then generate the indication information that terminal does not carry out ACK/NACK feedback, otherwise, generate the indication information that terminal carries out ACK/NACK feedback;
Described information transmitting unit specifically for: when sending described downlink data packet to terminal in described descending sub frame, described indication information is carried in Downlink Control Information DCI, and this DCI is sent to terminal.
6. via node as claimed in claim 5, is characterized in that, described information transmitting unit also for:
Before described indication information is sent to terminal by described information transmitting unit, send communication node type indication information, with indicating terminal present communication node for RN by broadcast or high-level signaling to terminal.
7. a terminal, is characterized in that, this terminal comprises:
Subframe determining unit, after receive downlink data packet on descending sub frame, feed back timing relationship according to downlink transfer in the TDD system preset and up answering/no answering ACK/NACK, determine sending the sub-frame of uplink that ACK/NACK feedback information corresponding to described downlink data packet uses;
Feedback determination unit, for according to the indication information whether carrying out ACK/NACK feedback received, determines whether in described sub-frame of uplink, feed back described ACK/NACK information;
Feedback processing unit, during for determining at described feedback determination unit not feed back described ACK/NACK information in described sub-frame of uplink, stops the feedback of ACK/NACK information; Or, choose the available upstream subframe except described sub-frame of uplink, and feed back described ACK/NACK information to via node RN in the sub-frame of uplink chosen; Described available upstream subframe is the subframe of the sub-frame of uplink not being configured to back haul link;
Wherein, described feedback determination unit specifically for: if receive the indication information carrying out ACK/NACK feedback, then determine in described sub-frame of uplink, feed back described ACK/NACK information; If receive the indication information not carrying out ACK/NACK feedback, then determine in described sub-frame of uplink, not feed back described ACK/NACK information.
8. terminal as claimed in claim 7, it is characterized in that, this terminal comprises further:
Communication node type determining units, for receiving the node type indication information that RN is sent by broadcast or high-level signaling, is RN according to this node type indication information determination present communication node.
9. a wireless communication system, is characterized in that, this system comprises:
Whether via node, carry out the indication information of answering/no answering ACK/NACK feedback for generating terminal; Described indication information is sent to terminal;
Terminal, after receive downlink data packet on descending sub frame, feeds back timing relationship according to the downlink transfer preset and uplink ACK/NACK, determines sending the sub-frame of uplink that ACK/NACK feedback information corresponding to described downlink data packet uses; According to described indication information, determine whether in described sub-frame of uplink, feed back described ACK/NACK information;
When determining not feed back described ACK/NACK information in described sub-frame of uplink, stop the feedback of ACK/NACK information; Or, choose the available upstream subframe except described sub-frame of uplink, and feed back described ACK/NACK information to via node RN in the sub-frame of uplink chosen; Described available upstream subframe is the subframe of the sub-frame of uplink not being configured to back haul link;
Described via node specifically for: after determining to need to send downlink data packet by descending sub frame to terminal, feeding back timing relationship according to the downlink transfer preset and uplink ACK/NACK, determining the sub-frame of uplink that terminal uses for sending ACK/NACK feedback information corresponding to described downlink data packet; Determine whether described sub-frame of uplink is configured to the sub-frame of uplink of back haul link, if so, then generate the indication information that terminal does not carry out ACK/NACK feedback, otherwise, generate the indication information that terminal carries out ACK/NACK feedback;
Described via node specifically for, when sending described downlink data packet to terminal in described descending sub frame, described indication information is carried in Downlink Control Information DCI, and this DCI is sent to terminal;
Described terminal specifically for: when described indication information is the indication information carrying out ACK/NACK feedback, determine in described sub-frame of uplink, feed back described ACK/NACK information; When described indication information is the indication information not carrying out ACK/NACK feedback, determine in described sub-frame of uplink, not feed back described ACK/NACK information.
CN201010159817.5A 2010-04-23 2010-04-23 Information on access link sends and response feedback method, system and equipment CN102237927B (en)

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WO2019095296A1 (en) * 2017-11-17 2019-05-23 北京小米移动软件有限公司 Hybrid automatic repeat request feedback indication and feedback method, device, and base station
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