CN102237927A - Method, system and equipment for information transmission and response feedback on access link - Google Patents
Method, system and equipment for information transmission and response feedback on access link Download PDFInfo
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- CN102237927A CN102237927A CN2010101598175A CN201010159817A CN102237927A CN 102237927 A CN102237927 A CN 102237927A CN 2010101598175 A CN2010101598175 A CN 2010101598175A CN 201010159817 A CN201010159817 A CN 201010159817A CN 102237927 A CN102237927 A CN 102237927A
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Abstract
The invention discloses a method, system and equipment for information transmission and response feedback on an access link, which are used for enhancing the transmission performance of the access link. In the invention, a terminal terminates the feedback of ACK (Acknowledgement)/NACK (Negative Acknowledgment) information or feeds back the ACK/NACK information in a usable uplink subframe except an uplink subframe after determining that ACK/ANCK is not fed back in the uplink subframe determined according to the existing feedback timing relation, according to uplink subframe configuration information of a return link transmitted by a relay node (RN) or indication formation on whether to carry out ACK/NACK feedback, so that the transmission performance of the access link can be effectively enhanced.
Description
Technical field
The present invention relates to wireless communication field, the information that relates in particular on the access link sends and response feedback method, system and equipment.
Background technology
In long-term evolution upgrading (LTE-Advanced) system, (Relay Node, RN) method of cooperation transmission can improve the service quality and the Extended Cell covering of Cell Edge User to adopt via node.Based on the LTE-A system of via node as shown in Figure 1.
The introducing of via node makes the Radio Link based on the mobile communication system of Relay have three: the direct projection link (direct link) between base station (eNB) and grand terminal (macro UE), access link (accesslink) between back haul link between eNB and RN (backhaul link) and RN and link terminal (relay UE), consider the signal interference-limited of radio communication, three links need use the Radio Resource of quadrature.Because the transceiver of via node is time division duplex (TDD) mode of operation, the backhaul link is to take different time slots in the tdd frame structure with the access link, but direct link and backhaul link are can be coexistent, as long as its running time-frequency resource quadrature.
The transmission of TDD system descending is as follows with up answering/no answering (ACK/NACK) feedback timing relationship:
For the TDD system, the ACK/NACK information that UE feeds back in sub-frame of uplink n be Physical Downlink Shared Channel on the subframe n-k (Physical Downlink Shared Channel, the PDSCH) testing result of (PDSCH), k ∈ K wherein, the K value is as shown in table 1.
Table 1:TDD system descending index K:{k
0, k
1... k
M-1}
For the major part configuration of TDD system, the number of sub-frame of uplink is less than the number of descending sub frame, and therefore the ACK/NACK of the PDSCH correspondence in a plurality of descending sub frames will transmit in same sub-frame of uplink.
When the TDD system supports that relaying is disposed, descending sub frame (the #0 of via node, #1, #5, #6) can not be configured to back haul link descending sub frame or be not configured to the back haul link descending sub frame 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 of these subframe correspondences is configured to the back haul link sub-frame of uplink, even relay UE sends the ACK/NACK of these subframe correspondences, relaying also can't be received uplink ACK/NACK, thereby can't judge whether receiving terminal receives correct, influence the transmission performance of access link.
Example as Fig. 2, for the configuration in the TDD system 2, timing relationship according to table 1 standard, the corresponding ACK/NACK of PDSCH transmission in the descending sub frame (#4, #5, #6, #8) transmits at sub-frame of uplink #2, if sub-frame of uplink #2 is configured to the back haul link sub-frame of uplink, subframe (#4, #5, #6) is used for the downlink transfer of access link, and then via node can't receive the ACK/NACK of the interior PDSCH correspondence of subframe (#4, #5, #6).
In realizing process of the present invention, the inventor finds to exist in the prior art following technical problem:
According to above-mentioned analysis, in TDD system based on via node, UE feeds back timing relationship according to the downlink transfer shown in the above-mentioned table 1 and uplink ACK/NACK, in sub-frame of uplink on the feeding back downlink subframe during ACK/NACK information of PDSCH correspondence, if this sub-frame of uplink is the sub-frame of uplink on the back haul link, then RN can't receive the ACK/NACK information that UE feeds back in this sub-frame of uplink, the feedback of ACK/NACK information has caused the waste of transfer resource, and whether correctly RN can't judge UE downlink data receiving, and then has influenced the transmission performance of access link.
Summary of the invention
It is a kind of based on the method for sending information on the access link in the TDD system of relaying and a kind of via node that the embodiment of the invention provides, and is used for solving terminal and how obtains to be used to judge the problem of whether carrying out the ACK/NACK feedack at sub-frame of uplink.
A kind of based on the method for sending information on the access link in the TDD system of relaying, this method comprises:
RN obtains the sub-frame of uplink configuration information of back haul link, or generates the indication information whether terminal carries out the ACK/NACK feedback;
RN sends to terminal with described sub-frame of uplink configuration information or described indication information, whether carries out the ACK/NACK feedback with indicating terminal in sub-frame of uplink.
A kind of via node, this via node comprises:
Information generating unit is used to obtain the sub-frame of uplink configuration information of back haul link, or generates the indication information whether terminal carries out the ACK/NACK feedback;
Information transmitting unit is used for described sub-frame of uplink configuration information or described indication information are sent to terminal, whether carries out the ACK/NACK feedback with indicating terminal in sub-frame of uplink.
In this programme, RN will be used for terminal and whether judge that the sub-frame of uplink configuration information or the indication information that carry out the ACK/NACK feedback at sub-frame of uplink send to terminal, and then solve terminal and how to obtain to be used for to judge the problem of whether carrying out the ACK/NACK feedack at sub-frame of uplink.
It is a kind of based on the response feedback method on the access link in the TDD system of relaying, a kind of terminal and a kind of wireless communication system that the embodiment of the invention also provides, and is used to improve the transmission performance of access link.
A kind of based on the response feedback method on the access link in the TDD system of relaying, this method comprises:
Terminal is fed back timing relationship according to downlink transfer and uplink ACK/NACK in the predefined TDD system after receiving downlink data packet on the descending sub frame, be identified for sending the employed sub-frame of uplink of ACK/NACK feedback information of described downlink data packet correspondence;
Terminal determines whether the described ACK/NACK information of feedback in described sub-frame of uplink according to the indication information that whether carries out the ACK/NACK feedback that receives or the sub-frame of uplink configuration information of back haul link;
Terminal stops the feedback of ACK/NACK information when determining in described sub-frame of uplink the described ACK/NACK information of feedback; Perhaps, choose the available sub-frame of uplink except that described sub-frame of uplink, and in the sub-frame of uplink of choosing, feed back described ACK/NACK information to RN; Described available sub-frame of uplink is the subframe that is not configured to the sub-frame of uplink of back haul link.
A kind of terminal, this terminal comprises:
The subframe determining unit, be used for after receiving downlink data packet on the descending sub frame, feed back timing relationship according to downlink transfer and uplink ACK/NACK in the predefined TDD system, be identified for sending the employed sub-frame of uplink of ACK/NACK feedback information of described downlink data packet correspondence;
The feedback determining unit is used for determining whether the described ACK/NACK information of feedback in described sub-frame of uplink according to the indication information that whether carries out the ACK/NACK feedback that receives or the sub-frame of uplink configuration information of back haul link;
The feedback processing unit is used for stopping the feedback of ACK/NACK information when described feedback determining unit is determined not in the described ACK/NACK information of described sub-frame of uplink feedback; Perhaps, choose the available sub-frame of uplink except that described sub-frame of uplink, and in the sub-frame of uplink of choosing, feed back described ACK/NACK information to RN; Described available sub-frame of uplink is the subframe that is not configured to the sub-frame of uplink of back haul link.
A kind of wireless communication system, this system comprises:
Via node is used to obtain the sub-frame of uplink configuration information of back haul link, or generates the indication information whether terminal carries out the ACK/NACK feedback; Described sub-frame of uplink configuration information or described indication information are sent to terminal;
Terminal is used for after receiving downlink data packet on the descending sub frame, feeds back timing relationship according to predefined downlink transfer and uplink ACK/NACK, is identified for sending the employed sub-frame of uplink of ACK/NACK feedback information of described downlink data packet correspondence; According to described sub-frame of uplink configuration information or described indication information, determine whether the described ACK/NACK information of feedback in described sub-frame of uplink;
When determining in described sub-frame of uplink the described ACK/NACK information of feedback, stop the feedback of ACK/NACK information; Perhaps, choose the available sub-frame of uplink except that described sub-frame of uplink, and in the sub-frame of uplink of choosing, feed back described ACK/NACK information to RN; Described available sub-frame of uplink is the subframe that is not configured to the sub-frame of uplink of back haul link.
In this programme, terminal is at the sub-frame of uplink configuration information of the back haul link that sends according to RN or do not carry out the indication information of ACK/NACK feedback, determine not in the sub-frame of uplink of determining according to existing feedback timing relationship behind feeding back ACK/NACK, stop the feedback of ACK/NACK information, avoided terminal to transmit the transmission resource waste that useless ACK/NACK information is caused.
Terminal is at the sub-frame of uplink configuration information of the back haul link that sends according to RN or do not carry out the indication information of ACK/NACK feedback, determine not in the sub-frame of uplink of determining according to existing feedback timing relationship behind feeding back ACK/NACK, at the available sub-frame of uplink feeding back ACK/nack message except that this sub-frame of uplink, because this available sub-frame of uplink is the subframe that is not configured to the sub-frame of uplink of back haul link, whether correctly RN can receive the ACK/NACK information that terminal sends, and then can judge terminal downlink data receiving.
As seen, adopt the present invention, can effectively improve the transmission performance of access link.
Description of drawings
Fig. 1 is a LTE-A system schematic of the prior art;
Fig. 2 is the back haul link sub-frame configuration schematic diagram of TDD configuration 2 in the prior art;
The method flow schematic diagram that Fig. 3 provides for the embodiment of the invention;
Fig. 4 is the embodiment of the invention one and two a subframe timing relationship schematic diagram;
The system configuration schematic diagram that Fig. 5 provides for the embodiment of the invention;
The RN structural representation that Fig. 6 provides for the embodiment of the invention;
The terminal structure schematic diagram that Fig. 7 provides for the embodiment of the invention.
Embodiment
In order to improve the transmission performance of access link, the embodiment of the invention provides a kind of and sends and the response feedback method based on the information on the access link in the TDD system of relaying, in this method, the indication information whether via node carries out the ACK/NACK feedback with the sub-frame of uplink configuration information or the terminal of back haul link sends to terminal, and terminal determines whether to carry out the ACK/NACK feedback according to the information that receives in the sub-frame of uplink of correspondence.
Referring to Fig. 3, what the embodiment of the invention provided sends and the response feedback method based on the information on the access link in the TDD system of relaying, specifically may further comprise the 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 the 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 that is configured to back haul link;
Step 31:RN sends to terminal with the sub-frame of uplink configuration information that gets access to or the indication information of generation, determines whether to carry out the ACK/NACK feedback with indicating terminal according to this indication information or sub-frame of uplink configuration information in sub-frame of uplink; This sub-frame of uplink is a terminal according to downlink transfer and uplink ACK/NACK feedback timing relationship (being the table 1 of background technology part) in the predefined TDD system, the employed sub-frame of uplink of determining of ACK/NACK feedback information that is used to be sent in the downlink data packet correspondence that receives in the descending sub frame;
Step 32: terminal is after receiving downlink data packet on the descending sub frame, according to downlink transfer and up answering/no answering ACK/NACK feedback timing relationship in the predefined TDD system, be identified for sending the employed sub-frame of uplink of ACK/NACK feedback information of this downlink data packet correspondence;
Step 33: terminal determines whether feeding back ACK/nack message in described sub-frame of uplink according to the indication information that whether carries out the ACK/NACK feedback that receives or the sub-frame of uplink configuration information of back haul link;
Step 34: terminal stops the feedback of ACK/NACK information when determining not feeding back ACK in described sub-frame of uplink/nack message; Perhaps, choose the available sub-frame of uplink except that this sub-frame of uplink, and in the sub-frame of uplink of choosing to RN feeding back ACK/nack message; This available sub-frame of uplink is the sub-frame of uplink that is not configured to the sub-frame of uplink of back haul link.When determining not feeding back ACK in sub-frame of uplink/nack message, stop the feedback of ACK/NACK information; Perhaps, feeding back ACK/nack message in other available sub-frame of uplink.
As first kind of embodiment:
In the RN side:
In the step 30, RN generates the indication information whether terminal carries out the ACK/NACK feedback, and its specific implementation can be as follows:
RN is in that determine need be by descending sub frame after terminal sends downlink data packet, feed back timing relationship according to downlink transfer and uplink ACK/NACK in the predefined TDD system, determine that terminal is used to send the employed sub-frame of uplink of ACK/NACK feedback information of this downlink data packet correspondence;
RN determines whether this sub-frame of uplink is configured to the sub-frame of uplink of back haul link, if, then generate the indication information that terminal is not carried out the ACK/NACK feedback, otherwise, the indication information that terminal is carried out the ACK/NACK feedback generated.
RN can be in descending sub frame when terminal sends downlink data packet, and the indication information that whether terminal is carried out the ACK/NACK feedback is carried in the Downlink Control Information (DCI), and this DCI is sent to terminal.Promptly carrying the DCI of indication information and downlink data wraps in the same descending sub frame and sends to terminal.
Accordingly, in end side:
In the step 33, terminal determines whether the described ACK/NACK information of feedback in sub-frame of uplink according to the indication information that whether carries out the ACK/NACK feedback that receives, and its specific implementation can be as follows:
If the indication information that receives is the indication information that carries out the ACK/NACK feedback, then determine feeding back ACK/nack message in sub-frame of uplink;
If the indication information that receives is then determined not feeding back ACK/nack message in sub-frame of uplink for not carrying out the indication information of ACK/NACK feedback.
As second kind of embodiment:
In the RN side:
RN can send to terminal with the sub-frame of uplink configuration information of back haul link by broadcast or high-level signaling etc.
Accordingly, in end side:
In the step 33, terminal determines whether feeding back ACK/nack message in sub-frame of uplink according to the sub-frame of uplink configuration information of the back haul link that receives, and its specific implementation can be as follows:
Terminal is according to the sub-frame of uplink configuration information of the back haul link that receives, whether the sub-frame of uplink of determining in the 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 above-mentioned two embodiment, in the step 34, terminal is chosen the available sub-frame of uplink except that the sub-frame of uplink of determining in the step 32, and its body is realized adopting following three kinds of modes:
First kind, terminal is chosen in the step 32 after the sub-frame of uplink of determining first and is not configured to the sub-frame of uplink of back haul link sub-frame of uplink, with the sub-frame of uplink chosen as available sub-frame of uplink;
When adopting this method, for above-mentioned first kind of embodiment, RN or other network equipments can send to terminal with the sub-frame of uplink configuration information on the back haul link, perhaps promptly are solidificated in the terminal the sub-frame of uplink configuration information on the back haul link is pre-configured.Terminal is chosen sub-frame of uplink definite in the step 32 first subframe that is not configured to the back haul link sub-frame of uplink afterwards as available sub-frame of uplink according to this information;
For above-mentioned second kind of embodiment, the sub-frame of uplink configuration information on the back haul link that terminal is directly sent according to RN is chosen first subframe that is not configured to the back haul link sub-frame of uplink after the sub-frame of uplink of determining in the step 32 as available sub-frame of uplink.
Second kind, terminal is chosen in the step 32 first sub-frame of uplink after the sub-frame of uplink of determining, with the sub-frame of uplink chosen as available sub-frame of uplink;
When adopting this method, according to the sub-frame configuration in the existing TDD system, first sub-frame of uplink after the sub-frame of uplink of determining in the step 32 is not configured to the sub-frame of uplink on the back haul link generally speaking.
The third, terminal is chosen the predefined sub-frame of uplink that is not configured to the back haul link sub-frame of uplink, with the sub-frame of uplink chosen as available sub-frame of uplink.
When adopting this method, can promptly be solidificated in the terminal the sub-frame information that is not configured to the sub-frame of uplink on the back haul link is pre-configured, terminal is chosen the subframe of this configuration as available sub-frame of uplink; Perhaps, terminal is fed back timing relationship according to new downlink transfer and the uplink ACK/NACK with RN side agreement, determine the employed sub-frame of uplink of the pairing ACK/NACK information of downlink data packet that feedback receives on descending sub frame, only need when configuration feedback timing relationship, to guarantee that sub-frame of uplink according to the definite transferring ACK/NACK of this feedback timing relationship is not configured to the back haul link sub-frame of uplink and gets final product.
RN sends to sub-frame of uplink configuration information or indication information before the terminal in step 30, and RN can send communication node type indication information to terminal by broadcast or high-level signaling, is RN with the current communication node of indicating terminal.Accordingly, after terminal determines that according to this node type indication information that receives current communication node is RN, ability execution in step 33 and subsequent step.If terminal can not determine that current communication node is RN according to this node type indication information that receives, feeding back ACK/nack message in the sub-frame of uplink of directly in step 32, determining according to prior art then.
Below the present invention is specifically described:
In the TDD system, base station and via node send the node type indication information of 1 bit (bit) to user terminal, and perhaps via node sends this indication information to user terminal separately, is used to make branch base station, user termination environment and via node.This indication information is invalid for version 8 user terminals, and version 10 user terminals can be discerned this indication information.This indication information sends to user terminal by broadcast.
If it is the base station that user terminal is judged communication node according to indication information, any special processing is not done in then the two proper communication.If but to judge communication node according to indication information be via node to user terminal, then can carry out following two kinds of processing:
Mode 1: via node sends to user terminal with the sub-frame of uplink configuration information of back haul link by broadcast or high-level signaling etc., user terminal does not send uplink ACK/NACK in the sub-frame of uplink position of back haul link, to avoid causing interference, the ACK/NACK that perhaps needs in the sub-frame of uplink with back haul link to send transfers in first available sub-frame of uplink after this subframe and sends, and perhaps transfers in the predetermined available sub-frame of uplink to send.
Mode 2: via node in the descending sub frame of access link to by the user terminal transmitting downlink data of descending scheduling the time, in the DCI of user terminal correspondence, add the indication information of 1bit, be used for indicating user terminal and in corresponding sub-frame of uplink, whether send uplink ACK/NACK.This indication information is UE exclusive (UE-specific), only adds in the DCI of version 10 user terminal correspondences.Version 10 user terminals judge whether to send ACK/NACK in corresponding sub-frame of uplink according to indication information, if do not require transmission, then version 10 user terminals do not send ACK/NACK in the sub-frame of uplink corresponding with descending sub frame, to avoid causing interference, the ACK/NACK that perhaps needs in the sub-frame of uplink with back haul link to send transfers in first available sub-frame of uplink after this subframe and sends, and perhaps transfers in the predetermined available sub-frame of uplink to send.
In addition, base station and via node can not send communication node type indication information by broadcast yet, but in the DCI of base station and via node, all add the indication information of 1bit, be used for indicating user terminal and in corresponding sub-frame of uplink, whether sending uplink ACK/NACK.This indication information is UE-specific's, only adds in the DCI of version 10 user terminal correspondences.In general, the indication information that the base station sends requires to send ACK/NACK all the time, and the indication information of via node may require to send or do not send ACK/NACK.Version 10 user terminals judge whether to send ACK/NACK in corresponding sub-frame of uplink according to indication information, if require to send, version 10 user terminals then send uplink ACK/NACK in corresponding sub-frame of uplink; If do not require transmission, then version 10 user terminals do not send ACK/NACK in the sub-frame of uplink corresponding with descending sub frame, to avoid causing interference, the ACK/NACK that perhaps needs in the sub-frame of uplink with back haul link to send transfers in first available sub-frame of uplink after this subframe and sends, and perhaps transfers in the predetermined available sub-frame of uplink to 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 the table 1, determine that terminal need 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 user terminal sends ACK/NACK at sub-frame of uplink 2, via node also can't be received, therefore carries the indication information that does not carry out the ACK/NACK feedback in DCI;
Step S02: after user terminal is received downlink data packet,, determine in sub-frame of uplink 2, to send ACK/NACK according to the descending HARQ timing relationship of the Rel-8 shown in the table 1;
Step S03: user terminal determines not send ACK/NACK according to the indication information among the DCI in sub-frame of uplink 2, and does not send the ACK/NACK of corresponding descending sub frame 4 in all sub-frame of uplink; Or uplink ACK/NACK of the corresponding descending sub frame 4 of transmission feeds back in first the available sub-frame of uplink 7 after sub-frame of uplink 2, as shown in Figure 4; Perhaps can in other predetermined available sub-frame of uplink, send.
Embodiment two:
Step S11: via node sends the sub-frame of uplink configuration information of back haul link to user terminal by broadcasting;
Step S12: via node sends downlink data packet at descending sub frame 4 to user terminal;
Step S13: after user terminal is received downlink data packet,, determine in sub-frame of uplink 2, to send ACK/NACK according to the descending HARQ timing relationship of the Rel-8 shown in the table 1;
Step S14: user terminal is according to the sub-frame of uplink configuration information of the back haul link that receives, know that sub-frame of uplink 2 is assigned to the sub-frame of uplink of back haul link, even user terminal sends ACK/NACK at sub-frame of uplink 2, via node also can't be received, therefore decision does not send ACK/NACK in sub-frame of uplink 2, and does not send the ACK/NACK of corresponding descending sub frame 4 in all sub-frame of uplink; Or uplink ACK/NACK of the corresponding descending sub frame 4 of transmission feeds back in first the available sub-frame of uplink 7 after sub-frame of uplink 2, as shown in Figure 4; Perhaps can in other predetermined available sub-frame of uplink, send.
Referring to Fig. 5, the embodiment of the invention also provides a kind of wireless communication system, and this system comprises:
Via node 50 is used to obtain 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;
When determining in described sub-frame of uplink the described ACK/NACK information of feedback, stop the feedback of ACK/NACK information; Perhaps, choose the available sub-frame of uplink except that described sub-frame of uplink, and in the sub-frame of uplink of choosing, feed back described ACK/NACK information to via node RN; Described available sub-frame of uplink is the subframe that is not configured to the sub-frame of uplink of back haul link.
Described via node 50 is used for:
In that determine need be by descending sub frame after terminal sends downlink data packet, feed back timing relationship according to predefined downlink transfer and uplink ACK/NACK, determine that terminal is used to send the employed sub-frame of uplink of ACK/NACK feedback information of described downlink data packet correspondence; Determine whether described sub-frame of uplink is configured to the sub-frame of uplink of back haul link, if, then generate the indication information that terminal is not carried out the ACK/NACK feedback, otherwise, the indication information that terminal is carried out the ACK/NACK feedback generated;
Accordingly, described terminal 51 is used for:
At described indication information is when carrying out the indication information of ACK/NACK feedback, determines the described ACK/NACK information of feedback in described sub-frame of uplink;
At described indication information is when not carrying out the indication information of ACK/NACK feedback, determines the described ACK/NACK information of feedback in described sub-frame of uplink.
Described terminal 51 is used for:
Sub-frame of uplink configuration information according to the back haul link that receives, judge whether described sub-frame of uplink is configured to the sub-frame of uplink of back haul link, if, then determine the described ACK/NACK information of feedback in described sub-frame of uplink, otherwise, determine the not described ACK/NACK information of feedback in described sub-frame of uplink.
Referring to Fig. 6, the embodiment of the invention also provides a kind of via node, and this via node comprises:
Described information generating unit 60 is used for:
In that determine need be by descending sub frame after terminal sends downlink data packet, feed back timing relationship according to downlink transfer and uplink ACK/NACK in the predefined TDD system, determine that terminal is used to send the employed sub-frame of uplink of ACK/NACK feedback information of described downlink data packet correspondence;
Determine whether described sub-frame of uplink is configured to the sub-frame of uplink of back haul link, if, then generate the indication information that terminal is not carried out the ACK/NACK feedback, otherwise, the indication information that terminal is carried out the ACK/NACK feedback generated.
Described information transmitting unit 61 is used for:
In described descending sub frame, when terminal sends described downlink data packet, described indication information is carried among the Downlink Control Information DCI, and this DCI is sent to terminal.
Described information transmitting unit 61 is used 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 is used for:
Before described information transmitting unit sends to terminal with described sub-frame of uplink configuration information or described indication information, send communication node type indication information by broadcast or high-level signaling to terminal, be RN with the current communication node of indicating terminal.
Referring to Fig. 7, the embodiment of the invention also provides a kind of terminal, and this terminal comprises:
Described feedback determining unit 71 is used for:
Sub-frame of uplink configuration information according to the back haul link that receives, judge whether described sub-frame of uplink is configured to the sub-frame of uplink of back haul link, if, then determine the described ACK/NACK information of feedback in described sub-frame of uplink, otherwise, determine the not described ACK/NACK information of feedback in described sub-frame of uplink.
Described feedback determining unit 71 is used for:
If receive the indication information that carries out the ACK/NACK feedback, then determine the described ACK/NACK information of feedback in described sub-frame of uplink;
If receive the indication information that does not carry out the ACK/NACK feedback, then determine the not described ACK/NACK information of feedback in described sub-frame of uplink.
Described feedback processing unit 72 is used for:
Choose after the described sub-frame of uplink first and be not configured to the sub-frame of uplink of back haul link sub-frame of uplink, with the sub-frame of uplink chosen as available sub-frame of uplink; Perhaps,
Choose first sub-frame of uplink after the described sub-frame of uplink, with the sub-frame of uplink chosen as available sub-frame of uplink; Perhaps,
Choose the predefined sub-frame of uplink that is not configured to the back haul link sub-frame of uplink, with the sub-frame of uplink chosen as available sub-frame of uplink.
This terminal further comprises:
Communication node type determining unit 73 is used to receive RN by the node type indication information that broadcast or high-level signaling send, and determines that according to this node type indication information current communication node is RN.
To sum up, beneficial effect of the present invention comprises:
In the scheme that the embodiment of the invention provides, terminal is at the sub-frame of uplink configuration information of the back haul link that sends according to RN or do not carry out the indication information of ACK/NACK feedback, determine not in the sub-frame of uplink of determining according to existing feedback timing relationship behind feeding back ACK/NACK, stop the feedback of ACK/NACK information, avoided terminal to transmit the transmission resource waste that useless ACK/NACK information is caused.
Terminal is at the sub-frame of uplink configuration information of the back haul link that sends according to RN or do not carry out the indication information of ACK/NACK feedback, determine not in the sub-frame of uplink of determining according to existing feedback timing relationship behind feeding back ACK/NACK, at the available sub-frame of uplink feeding back ACK/nack message except that this sub-frame of uplink, because this available sub-frame of uplink is the subframe that is not configured to the sub-frame of uplink of back haul link, whether correctly RN can receive the ACK/NACK information that terminal sends, and then can judge terminal downlink data receiving.
As seen, adopt the present invention, can effectively improve transmission performance based on access link in the TDD system of relaying.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (21)
1. one kind based on the method for sending information on the access link in the TDD system of relaying, it is characterized in that this method comprises:
Via node RN obtains 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;
RN sends to terminal with described sub-frame of uplink configuration information or described indication information, whether carries out the ACK/NACK feedback with indicating terminal in sub-frame of uplink.
2. the method for claim 1 is characterized in that, the indication information whether described generation terminal carries out answering/no answering ACK/NACK feedback comprises:
RN is in that determine need be by descending sub frame after terminal sends downlink data packet, feed back timing relationship according to downlink transfer and uplink ACK/NACK in the predefined TDD system, determine that terminal is used to send the employed sub-frame of uplink of ACK/NACK feedback information of described downlink data packet correspondence;
RN determines whether described sub-frame of uplink is configured to the sub-frame of uplink of back haul link, if, then generate the indication information that terminal is not carried out the ACK/NACK feedback, otherwise, the indication information that terminal is carried out the ACK/NACK feedback generated.
3. method as claimed in claim 2 is characterized in that, described RN sends to terminal with described indication information and comprises:
RN when terminal sends described downlink data packet, is carried at described indication information among the Downlink Control Information DCI in described descending sub frame, and this DCI is sent to terminal.
4. the method for claim 1 is characterized in that, RN sends to terminal by broadcast or high-level signaling with the sub-frame of uplink configuration information of described back haul link.
5. as arbitrary described method among the claim 1-4, it is characterized in that before RN sent to terminal with described sub-frame of uplink configuration information or described indication information, this method further comprised:
RN sends communication node type indication information by broadcast or high-level signaling to terminal, is RN with the current communication node of indicating terminal.
6. one kind based on the response feedback method on the access link in the TDD system of relaying, it is characterized in that this method comprises:
Terminal is after receiving downlink data packet on the descending sub frame, according to downlink transfer and up answering/no answering ACK/NACK feedback timing relationship in the predefined TDD system, be identified for sending the employed sub-frame of uplink of ACK/NACK feedback information of described downlink data packet correspondence;
Terminal determines whether the described ACK/NACK information of feedback in described sub-frame of uplink according to the indication information that whether carries out the ACK/NACK feedback that receives or the sub-frame of uplink configuration information of back haul link;
Terminal stops the feedback of ACK/NACK information when determining in described sub-frame of uplink the described ACK/NACK information of feedback; Perhaps, choose the available sub-frame of uplink except that described sub-frame of uplink, and in the sub-frame of uplink of choosing, feed back described ACK/NACK information to via node RN; Described available sub-frame of uplink is the subframe that is not configured to the sub-frame of uplink of back haul link.
7. method as claimed in claim 6 is characterized in that, described terminal determines whether that according to the sub-frame of uplink configuration information of the back haul link that receives the described ACK/NACK information of feedback comprises in described sub-frame of uplink:
Terminal is according to the sub-frame of uplink configuration information of the back haul link that receives, judge whether described sub-frame of uplink is configured to the sub-frame of uplink of back haul link, if, then determine the described ACK/NACK information of feedback in described sub-frame of uplink, otherwise, determine the not described ACK/NACK information of feedback in described sub-frame of uplink.
8. method as claimed in claim 6 is characterized in that, described terminal determines whether that according to the indication information that whether carries out the ACK/NACK feedback that receives the described ACK/NACK information of feedback comprises in described sub-frame of uplink:
If described indication information is the indication information that carries out the ACK/NACK feedback, then determine the described ACK/NACK information of feedback in described sub-frame of uplink;
If described indication information, is then determined the not described ACK/NACK information of feedback in described sub-frame of uplink for not carrying out the indication information of ACK/NACK feedback.
9. as arbitrary described method among the claim 6-8, it is characterized in that before determining whether to feed back described ACK/NACK information in described sub-frame of uplink, this method further comprises:
Terminal receives RN by the node type indication information that broadcast or high-level signaling send, and determines that according to this node type indication information current communication node is RN.
10. a via node is characterized in that, this via node comprises:
Information generating unit is used to obtain 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 is used for described sub-frame of uplink configuration information or described indication information are sent to terminal, whether carries out the ACK/NACK feedback with indicating terminal in sub-frame of uplink.
11. via node as claimed in claim 10 is characterized in that, described information generating unit is used for:
In that determine need be by descending sub frame after terminal sends downlink data packet, feed back timing relationship according to downlink transfer and uplink ACK/NACK in the predefined TDD system, determine that terminal is used to send the employed sub-frame of uplink of ACK/NACK feedback information of described downlink data packet correspondence;
Determine whether described sub-frame of uplink is configured to the sub-frame of uplink of back haul link, if, then generate the indication information that terminal is not carried out the ACK/NACK feedback, otherwise, the indication information that terminal is carried out the ACK/NACK feedback generated.
12. via node as claimed in claim 11 is characterized in that, described information transmitting unit is used for:
In described descending sub frame, when terminal sends described downlink data packet, described indication information is carried among the Downlink Control Information DCI, and this DCI is sent to terminal.
13. via node as claimed in claim 10 is characterized in that, described information transmitting unit is used for:
By broadcast or high-level signaling the sub-frame of uplink configuration information of described back haul link is sent to terminal.
14., it is characterized in that described information transmitting unit also is used for as arbitrary described via node among the claim 10-13:
Before described information transmitting unit sends to terminal with described sub-frame of uplink configuration information or described indication information, send communication node type indication information by broadcast or high-level signaling to terminal, be RN with the current communication node of indicating terminal.
15. a terminal is characterized in that, this terminal comprises:
The subframe determining unit, be used for after receiving downlink data packet on the descending sub frame, according to downlink transfer and up answering/no answering ACK/NACK feedback timing relationship in the predefined TDD system, be identified for sending the employed sub-frame of uplink of ACK/NACK feedback information of described downlink data packet correspondence;
The feedback determining unit is used for determining whether the described ACK/NACK information of feedback in described sub-frame of uplink according to the indication information that whether carries out the ACK/NACK feedback that receives or the sub-frame of uplink configuration information of back haul link;
The feedback processing unit is used for stopping the feedback of ACK/NACK information when described feedback determining unit is determined not in the described ACK/NACK information of described sub-frame of uplink feedback; Perhaps, choose the available sub-frame of uplink except that described sub-frame of uplink, and in the sub-frame of uplink of choosing, feed back described ACK/NACK information to via node RN; Described available sub-frame of uplink is the subframe that is not configured to the sub-frame of uplink of back haul link.
16. terminal as claimed in claim 15 is characterized in that, described feedback determining unit is used for:
Sub-frame of uplink configuration information according to the back haul link that receives, judge whether described sub-frame of uplink is configured to the sub-frame of uplink of back haul link, if, then determine the described ACK/NACK information of feedback in described sub-frame of uplink, otherwise, determine the not described ACK/NACK information of feedback in described sub-frame of uplink.
17. terminal as claimed in claim 15 is characterized in that, described feedback determining unit is used for:
If receive the indication information that carries out the ACK/NACK feedback, then determine the described ACK/NACK information of feedback in described sub-frame of uplink;
If receive the indication information that does not carry out the ACK/NACK feedback, then determine the not described ACK/NACK information of feedback in described sub-frame of uplink.
18., it is characterized in that this terminal further comprises as arbitrary described terminal among the claim 15-17:
Communication node type determining unit is used to receive RN by the node type indication information that broadcast or high-level signaling send, and determines that according to this node type indication information current communication node is RN.
19. a wireless communication system is characterized in that, this system comprises:
Via node is used to obtain 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 is used for after receiving downlink data packet on the descending sub frame, feeds back timing relationship according to predefined downlink transfer and uplink ACK/NACK, is identified for sending the employed sub-frame of uplink of ACK/NACK feedback information of described downlink data packet correspondence; According to described sub-frame of uplink configuration information or described indication information, determine whether the described ACK/NACK information of feedback in described sub-frame of uplink;
When determining in described sub-frame of uplink the described ACK/NACK information of feedback, stop the feedback of ACK/NACK information; Perhaps, choose the available sub-frame of uplink except that described sub-frame of uplink, and in the sub-frame of uplink of choosing, feed back described ACK/NACK information to via node RN; Described available sub-frame of uplink is the subframe that is not configured to the sub-frame of uplink of back haul link.
20. system as claimed in claim 19 is characterized in that, described via node is used for:
In that determine need be by descending sub frame after terminal sends downlink data packet, feed back timing relationship according to predefined downlink transfer and uplink ACK/NACK, determine that terminal is used to send the employed sub-frame of uplink of ACK/NACK feedback information of described downlink data packet correspondence; Determine whether described sub-frame of uplink is configured to the sub-frame of uplink of back haul link, if, then generate the indication information that terminal is not carried out the ACK/NACK feedback, otherwise, the indication information that terminal is carried out the ACK/NACK feedback generated;
Described terminal is used for:
At described indication information is when carrying out the indication information of ACK/NACK feedback, determines the described ACK/NACK information of feedback in described sub-frame of uplink;
At described indication information is when not carrying out the indication information of ACK/NACK feedback, determines the described ACK/NACK information of feedback in described sub-frame of uplink.
21. system as claimed in claim 19 is characterized in that, described terminal is used for:
Sub-frame of uplink configuration information according to the back haul link that receives, judge whether described sub-frame of uplink is configured to the sub-frame of uplink of back haul link, if, then determine the described ACK/NACK information of feedback in described sub-frame of uplink, otherwise, determine the not described ACK/NACK information of feedback in described sub-frame of uplink.
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| CN201010159817.5A CN102237927B (en) | 2010-04-23 | 2010-04-23 | Information on access link sends and response feedback method, system and equipment |
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Address after: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee after: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY Address before: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee before: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY |
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Effective date of registration: 20210528 Address after: 100085 1st floor, building 1, yard 5, Shangdi East Road, Haidian District, Beijing Patentee after: DATANG MOBILE COMMUNICATIONS EQUIPMENT Co.,Ltd. Address before: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee before: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY |