CN102420682A - Relay link downlink feedback information transmission sequence determination method and apparatus thereof - Google Patents
Relay link downlink feedback information transmission sequence determination method and apparatus thereof Download PDFInfo
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Abstract
The invention discloses a relay link downlink feedback information transmission sequence determination method in a TDD LTE-A (time division dual long term evolution-advanced) system and an apparatus thereof. The method comprises the following steps: according to a relay subframe configuration set under a subframe uplink-downlink configuration in the TDD LTE-A system, determining relay link downlink feedback information transmission sequence, wherein, the sequence refers to sequential relation of relay link uplink service data transmission and corresponding downlink feedback information transmission. By employing the method, correct transmission of relay link downlink ACK/NACK feedback information can be ensured, and then reliability of service data transmission between a base station and a relay station is ensured.
Description
Technical field
The present invention relates to the communications field, repeated link downlink feedback information transmission time sequence is confirmed method and device in a kind of time division duplex advanced long-term evolution system TDD LTE-A.
Background technology
The demand for development of mobile communication is to support higher transmission rate, more perfect signal to cover and higher resource utilization.Relaying (Relay) technology can increase covering and balance, increase cell throughout; And relay station is than the base station; Has less relatively deployment cost; Therefore relaying is regarded as evolution system---senior Long Term Evolution (LTE-A, LTE-Advanced) key technology in the system of Long Term Evolution (LTE, Long Term Evolution).
At time division duplex (TDD; Time Division Dual) in the LTE system; Frequency resource is respectively that unit divides in time with the frame, and the LTE here refers in particular to two protocol version Release-8 or the Release-9 of LTE usually, is called for short Rel-8 or Rel-9.As shown in Figure 1, the length of each radio frames is 10 milliseconds, and it is 1 millisecond subframe that each radio frames comprises 10 length, wherein comprises sub-frame of uplink, descending sub frame and special subframe respectively.Different to proportion of ascending subframe and descending subframe; Have 7 kinds of subframe configuration structure (subframe uplink-downlink configuration in the TDD LTE system; Uplink-downlink configuration; Be called for short UL-DLconfiguration), proportion of ascending subframe and descending subframe is all inequality in every kind of configuration structure, and system can carry out flexible configuration according to the factors such as traffic carrying capacity of up-downgoing in the sub-district.7 kinds of concrete configurations are as shown in table 1, and wherein D representes descending sub frame, and U representes sub-frame of uplink, and S representes special subframe.Evolution system as the TDD LTE that guarantees backwards compatibility; (LTE-A of current generation refers generally to LTE Release-10 version to TDDLTE-A; Be called for short Rel-10; Later also may comprise the version that Rel-10 is later, for example Release-11 etc.) system can keep the frame structure identical with TDD LTE.
Subframe uplink-downlink configuration form in the table 1TDD LTE system
Mixing automatic repeat requests (HARQ, Hybrid-Automatic Repeat Request) is error control method important in the block transmission system, can effectively improve transmission reliability.In the HARQ transmission, for the transmission of business datum, need to obtain corresponding feedback information, confirm that promptly (ACK/NACK, Acknowledge/NegativeAcknowledge) information is to determine whether and need retransmit in perhaps non-affirmation.
In TDD LTE-A system, introduce after the relay station, be equivalent to the transmission of data many a jumping, variation has taken place in the communication pattern at promptly original base station-terminal.With the double bounce system is example, and the communication pattern of accepting the terminal of relay station service becomes the mode at base station-relay station-terminal.At this time; Just need in the uplink and downlink resource, to divide respectively the communication resource (corresponding interface also be referred to as Un interface) of a part as base station-relay station; Promptly mark a part of subframe and be used for the communication of base station-relay station, these subframes are called as relay sub-frame (or Un subframe).For downlink relay sub-frame; Relay station indicates that it is Multicast Broadcast Single Frequency Network (MBSFN to subordinate Rel-8 terminal; Multicast Broadcast Single FrequencyNetwork) subframe; And do not go in the resource of Rel-8 terminal outside the control domain of MBSFN subframe to receive, thereby guarantee relay station compatibility for the Rel-8 terminal when carrying out descending the reception.For uplink relay subframe, through the uplink service of subordinate terminal not being dispatched, the terminal is also in up emission when avoiding the up emission of relay station.
But; In correlation technique, do not have the sequence problem of clear and definite repeated link uplink traffic transmission and corresponding descending ACK/NACK transmission of feedback information, and for the base station; To cause not knowing when transmit this feedback information; The corresponding relay station does not know when this receives this feedback information yet, and this may cause repeated link HARQ efficiency of transmission to reduce, and then the transfer of data of relay station subordinate terminal is impacted.
To there not being scheme can guarantee the descending ACK/NACK feedback information of repeated link correct transmission in the correlation technique, and then can not guarantee the reliability problems of business data transmission between base station and the relay station, not propose effective solution at present as yet.
Summary of the invention
Main purpose of the present invention is to provide among a kind of TDD LTE-A repeated link downlink feedback information transmission time sequence to confirm method and device; Do not have scheme can guarantee the descending ACK/NACK feedback information of repeated link correct transmission in the above-mentioned correlation technique to solve at least, and then can not guarantee the reliability problems of business data transmission between base station and the relay station.
According to an aspect of the present invention, provide among a kind of TDD LTE-A repeated link downlink feedback information transmission time sequence to confirm method, having comprised:
According to the set of the relay sub-frame configuration under the subframe uplink-downlink configuration in the TDD LTE-A system, confirm repeated link downlink feedback information transmission time sequence;
Wherein, said sequential refers to the sequential relationship of transmission of repeated link uplink business data and the transmission of corresponding downlink feedback information.
More excellent, also comprise:
The base station receives the repeated link uplink business data that relay station sends, and confirms the subframe position of said downlink feedback information transmission and in said subframe, sends said downlink feedback information according to said sequential; And
Said relay station is confirmed said downlink feedback information transmission subframe position and in said subframe, is received said downlink feedback information according to said sequential.
More excellent, said definite repeated link downlink feedback information transmission time sequence comprises:
When said subframe uplink-downlink configuration is subframe uplink-downlink configuration 1; When comprising subframe 3 and 9 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 3 corresponding repeated link uplink business datas transmit is in subframe 9 transmission of current wireless frame;
When comprising subframe 4 and 8 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 8 corresponding repeated link uplink business datas transmit is in subframe 4 transmission of next radio frames.
More excellent, said definite repeated link downlink feedback information transmission time sequence comprises:
When said subframe uplink-downlink configuration is subframe uplink-downlink configuration 2; When comprising subframe 2 and 8 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 2 corresponding repeated link uplink business datas transmit is in subframe 8 transmission of current wireless frame;
When comprising subframe 3 and 7 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 7 corresponding repeated link uplink business datas transmit is in subframe 3 transmission of next radio frames.
More excellent, said definite repeated link downlink feedback information transmission time sequence comprises:
When said subframe uplink-downlink configuration is subframe uplink-downlink configuration 3; When comprising subframe 2 and 8 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 2 corresponding repeated link uplink business datas transmit is in subframe 8 transmission of current wireless frame;
When comprising subframe 3 and 9 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 3 corresponding repeated link uplink business datas transmit is in subframe 9 transmission of current wireless frame;
When only comprising subframe 3 and 7 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 3 corresponding repeated link uplink business datas transmit is in subframe 7 transmission of current wireless frame;
When only comprising subframe 3 and 8 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 3 corresponding repeated link uplink business datas transmit is in subframe 8 transmission of current wireless frame;
When only comprising subframe 3,7 and 8 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 3 corresponding repeated link uplink business datas transmit is in the subframe 7 or 8 transmission of current wireless frame;
When only comprising subframe 4 and 9 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 4 corresponding repeated link uplink business datas transmit is in subframe 9 transmission of current wireless frame.
More excellent, said definite repeated link downlink feedback information transmission time sequence comprises:
When said subframe uplink-downlink configuration is subframe uplink-downlink configuration 4; When comprising subframe 2 and 8 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 2 corresponding repeated link uplink business datas transmit is in subframe 8 transmission of current wireless frame;
When comprising subframe 3 and 9 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 3 corresponding repeated link uplink business datas transmit is in subframe 9 transmission of current wireless frame.
More excellent, said definite repeated link downlink feedback information transmission time sequence comprises:
When said subframe uplink-downlink configuration is subframe uplink-downlink configuration 6; When comprising subframe 4 and 9 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 4 corresponding repeated link uplink business datas transmit is in subframe 9 transmission of current wireless frame.
More excellent, said downlink feedback information identifies through indication NDI of the new data among the uplink authorization UL grant and/or the automatic repeat requests HARQ indicating channel of repeated link physical mixed R-PHICH.
According to a further aspect in the invention, provide among a kind of TDD LTE-A repeated link downlink feedback information transmission time sequence to confirm device, having comprised:
Selected cell is used for selecting the relay sub-frame configuration set under the subframe uplink-downlink configuration in TDD LTE-A system;
Confirm the unit, be used for confirming repeated link downlink feedback information transmission time sequence according to the set of the relay sub-frame configuration under the subframe uplink-downlink configuration of selecting; Wherein, said sequential refers to the sequential relationship of transmission of repeated link uplink business data and the transmission of corresponding downlink feedback information.
More excellent, said definite unit is further used for:
When said subframe uplink-downlink configuration is subframe uplink-downlink configuration 1; When comprising subframe 3 and 9 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 3 corresponding repeated link uplink business datas transmit is in subframe 9 transmission of current wireless frame; And
When comprising subframe 4 and 8 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 8 corresponding repeated link uplink business datas transmit is in subframe 4 transmission of next radio frames.
More excellent, said definite unit is further used for:
When said subframe uplink-downlink configuration is subframe uplink-downlink configuration 2; When comprising subframe 2 and 8 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 2 corresponding repeated link uplink business datas transmit is in subframe 8 transmission of current wireless frame;
When comprising subframe 3 and 7 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 7 corresponding repeated link uplink business datas transmit is in subframe 3 transmission of next radio frames.
More excellent, said definite unit is further used for:
When said subframe uplink-downlink configuration is subframe uplink-downlink configuration 3; When comprising subframe 2 and 8 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 2 corresponding repeated link uplink business datas transmit is in subframe 8 transmission of current wireless frame;
When comprising subframe 3 and 9 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 3 corresponding repeated link uplink business datas transmit is in subframe 9 transmission of current wireless frame;
When only comprising subframe 3 and 7 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 3 corresponding repeated link uplink business datas transmit is in subframe 7 transmission of current wireless frame;
When only comprising subframe 3 and 8 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 3 corresponding repeated link uplink business datas transmit is in subframe 8 transmission of current wireless frame;
When only comprising subframe 3,7 and 8 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 3 corresponding repeated link uplink business datas transmit is in the subframe 7 or 8 transmission of current wireless frame;
When only comprising subframe 4 and 9 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 4 corresponding repeated link uplink business datas transmit is in subframe 9 transmission of current wireless frame.
More excellent, said definite unit is further used for:
When said subframe uplink-downlink configuration is subframe uplink-downlink configuration 4; When comprising subframe 2 and 8 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 2 corresponding repeated link uplink business datas transmit is in subframe 8 transmission of current wireless frame;
When comprising subframe 3 and 9 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 3 corresponding repeated link uplink business datas transmit is in subframe 9 transmission of current wireless frame.
More excellent, said definite unit is further used for:
When said subframe uplink-downlink configuration is subframe uplink-downlink configuration 6; When comprising subframe 4 and 9 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 4 corresponding repeated link uplink business datas transmit is in subframe 9 transmission of current wireless frame.
Through the present invention; According to the set of the relay sub-frame configuration under the subframe uplink-downlink configuration in the TDD LTE-A system, confirm repeated link downlink feedback information transmission time sequence, for the base station; When can know the feeding back downlink feedback information; The corresponding relay station also can know when receive the downlink feedback information that send the base station, fully guarantee reliability of data transmission between base station and the relay station, the problem of having avoided repeated link HARQ efficiency of transmission to reduce; Thereby avoid the transfer of data of relay station subordinate terminal is impacted, guaranteed backwards compatibility for the terminal.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of the radio frames that provides of correlation technique;
Fig. 2 is the base station that provides of the embodiment of the invention and relay station carry out transfer of data according to the sequential of confirming a process chart;
Fig. 3 is the process chart according to the definite downlink feedback information transmission time sequence of the set of the relay sub-frame configuration under the subframe uplink-downlink configuration in the TDD LTE-A system that the embodiment of the invention provides;
Fig. 4 is the structural representation that repeated link downlink feedback information transmission time sequence is confirmed device among the TDD LTE-A that provides of the embodiment of the invention.
Embodiment
Hereinafter will and combine embodiment to specify the present invention with reference to accompanying drawing.Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.
Whether in the HARQ of communication system transmission, transmitting terminal need obtain a feedback information (ACK/NACK) from receiving terminal after service data transmission, transmit correctly to confirm this business datum.Consider the HARQ efficiency of transmission, all need know for sure the subframe position of transmission of feedback information of transmitting terminal and receiving terminal.Do not consider the details of the descending ACK/NACK transmission of feedback information of TDD system repeated link sequential in the correlation technique, promptly relay station is after the transmission uplink business data, and the base station is transmitted downlink feedback information wherein, and relay station receives this downlink feedback information wherein.After confirming this sequential relationship, could guarantee that relay station effectively obtains descending ACK/NACK feedback information, guarantees the efficient of ascending HARQ transmission.
For solving the problems of the technologies described above; The embodiment of the invention provides definite method of repeated link downlink feedback information transmission time sequence among a kind of TDD LTE-A; Comprise:, confirm repeated link downlink feedback information transmission time sequence according to the set of the relay sub-frame configuration under the subframe uplink-downlink configuration in the TDDLTE-A system; Wherein, repeated link downlink feedback information transmission time sequence refers to the sequential relationship of transmission of repeated link uplink business data and the transmission of corresponding downlink feedback information.
When implementing; The downlink feedback information that the embodiment of the invention is mentioned is often referred to affirmation/non-affirmation ACK/NACK information, certainly, and in the subsequent applications of the embodiment of the invention; Which kind of feedback information the downlink feedback information that also possibly comprise other specifically adopts decide according to actual conditions.
In embodiments of the present invention; The downlink feedback information transmission time sequence relation of repeated link uplink traffic transmission is confirmed according to the subframe uplink-downlink configuration of supporting relay transmission in the TDD system and the repeated link sub-frame configuration under the said subframe uplink-downlink configuration; The unique sequential relationship of having confirmed repeated link uplink traffic transmission and descending ACK/NACK transmission of feedback information of repeated link sub-frame configuration; That is: after relay sub-frame configuration is confirmed in the base station, can confirm the sequential relationship of transmitting uplink data and downlink feedback information transmission; Relay station can be confirmed the sequential relationship of downlink feedback information transmission after obtaining relay sub-frame configuration information, also be that repeated link downlink feedback information transmission time sequence is corresponding one by one with relay sub-frame configuration.The method that the embodiment of the invention provides has taken into full account the flexibility of relay sub-frame configuration; Reach the transmission of repeated link downstream feedback and retransmit sequential reasonability at interval, guarantee reliability of data transmission and enforcement simple (need not extra signaling indication transmission of feedback information position) in real system between base station and the relay station; Thereby avoided influence, guaranteed backwards compatibility for the terminal for relay station subordinate terminal transfer of data.
During enforcement, after repeated link downlink feedback information transmission time sequence was confirmed, base station and relay station all can carry out transfer of data according to the sequential of confirming, concrete handling process is as shown in Figure 2, comprising:
Step 202, according to the relay sub-frame configuration under the subframe uplink-downlink configuration in TDD LTE-A system set, confirm repeated link downlink feedback information transmission time sequence;
Step 204, base station receive the repeated link uplink business data that relay station sends, and confirm the subframe position of downlink feedback information transmission and in subframe, send downlink feedback information according to sequential;
Step 206, relay station are confirmed downlink feedback information transmission subframe position and in subframe, are received downlink feedback information according to the downlink feedback information transmission time sequence.
Generally speaking, business data transmission need satisfy processing delay with the transmission time sequence of corresponding ACK/NACK feedback information.Be after receiving terminal receives business datum, (could confirm should be to transmitting terminal feeding back ACK or nack message for Cyclic RedundantCheck, CRC) operation such as verification to need enough processing times carry out demodulation, decoding and CRC.Simultaneously, after transmitting terminal receives feedback information, also need time enough to handle and retransmit the perhaps data of new transfer (coding and modulation etc.); In LTE; It is generally acknowledged the minimum 4ms of being of time delay of these two sequential, after promptly subframe n receives data, generally satisfy and feed back more than or equal to the subframe of n+4 in subframe position; And behind subframe n+4 receiving feedback information, the subframe that satisfies more than or equal to (n+4)+4 in subframe position retransmits or new data transmission.Therefore, repeated link downlink feedback information transmission time sequence also need be followed this principle.On the other hand; The definition of downlink feedback information transmission time sequence should be considered delay problem; Be that above-mentioned sequential at interval can not be too big, too conference causes the time delay of professional transmission to increase, and causes the propagation delay time at the following terminal of relay station to increase then; Can adopt a kind of more excellent execution mode here: a preset feedback delay is set, only selects feedback delay less than preset feedback delay downlink feedback information transmission time sequence; Concrete handling process is as shown in Figure 3:
Step 302, under each subframe uplink-downlink configuration, select the relay sub-frame configuration set of feedback delay less than preset feedback delay;
Step 304, confirm the downlink feedback information transmission time sequence according to the relay sub-frame configuration set of selecting.
Wherein, preset feedback delay depends on the transport service type, and the preset feedback delay value of different service is different, and the preset feedback delay of partial service is bigger, and the preset feedback delay of partial service is less, and concrete preset feedback delay is decided according to actual conditions.
Mention the subframe uplink-downlink configuration in the correlation technique and have 7 kinds; Specifically referring to table 1; But owing to confirm that at present subframe uplink-downlink configuration 0 is not supported relay transmission with subframe uplink-downlink configuration 5 in TDD Rel-10; Therefore, the situation that does not all comprise subframe uplink-downlink configuration 0 and subframe uplink-downlink configuration 5 in various embodiments of the present invention.
Embodiment one: the subframe uplink-downlink configuration is a subframe uplink-downlink configuration 1
Subframe uplink-downlink configuration 1 time, because the restriction of MBSFN sub-frame configuration has only descending sub frame 4 and 9 can be configured to downlink relay sub-frame, subframe 2,3,7 and 8 can be configured to uplink relay subframe.If subframe 2 is configured to uplink relay subframe; Subframe 9 satisfies the descending time delay relation of uplink traffic transmission so; But re-transmission after subframe 9 transmission of feedback information next time can only be in subframe 2 transmission of next but one radio frames, and being equivalent to feedback delay is 13ms, and promptly feedback delay is excessive.Therefore preferred subframe 2 is not configured to uplink relay subframe.In like manner can get, subframe 7 is not configured to uplink relay subframe yet.For disposing 3,4,8,9 of relay sub-frame, can obtain 5 kinds of different relay sub-frame configuration as shown in table 2 like this according to ascending-descending subframes ratio difference.Described repeated link downlink feedback information transmission time sequence can reduce: when comprising subframe 3 and 9 in the subframe configuration set, the feedback information of subframe 3 repeated link uplink business datas transmission is in subframe 9 transmission of current wireless frame; When comprising subframe 4 and 8 in the subframe configuration set, the feedback information of subframe 8 repeated link uplink business datas transmission is in subframe 4 transmission of next radio frames.
Above-mentioned sequential relationship is come out with form description; Uplink traffic transmission under each relay sub-frame configuration and transmission of feedback information sequential relationship are shown in table two: the uplink of the corresponding subframe n-k of downlink feedback information among the subframe n; Wherein, N is a subframe index, and promptly the subframe in the radio frames is numbered, and scope is from 0-9; K is a feedback delay, is corresponding numeral under the subframe index in the table two.In follow-up description, DL representes descending sub frame, and UL representes sub-frame of uplink.
The relay sub-frame configuration and the up feedback sequential k value table of table 2:TDD subframe uplink-downlink configuration 1
In table 2, just enumerated possible relay sub-frame configuration situation, do not represent the relay sub-frame configuration under this configuration to have only these several kinds, do not represent cited relay sub-frame configuration all can be supported yet.
Embodiment two: the subframe uplink-downlink configuration is a subframe uplink-downlink configuration 2
Subframe uplink-downlink configuration 2 times, descending sub frame 3,4,8 and 9 can be configured to downlink relay sub-frame, and subframe 2 and 7 can be configured to uplink relay subframe.If subframe 2 is configured to uplink relay subframe; Subframe 8 and 9 satisfies the descending time delay relation of uplink traffic transmission so; But re-transmission after subframe 9 transmission of feedback information next time can only be in subframe 2 transmission of next but one radio frames, and being equivalent to feedback delay is 13ms, and promptly feedback delay is excessive.The downlink feedback information of therefore preferred subframe 2 uplink traffic transmission is in subframe 8 transmission.In like manner can get, the downlink feedback information of subframe 7 uplink traffic transmission is preferably in subframe 3 transmission.Described repeated link downlink feedback information transmission time sequence can reduce: when comprising subframe 2 and 8 in the subframe configuration set, the feedback information of subframe 2 repeated link uplink business datas transmission is in subframe 8 transmission of current wireless frame; When comprising subframe 3 and 7 in the subframe configuration set, the feedback information of subframe 7 repeated link uplink business datas transmission is in subframe 3 transmission of next radio frames.
Above-mentioned sequential relationship is come out with form description; Can obtain 10 kinds of different relay sub-frame configuration shown in table three according to ascending-descending subframes ratio difference, the uplink traffic transmission under each relay sub-frame configuration and transmission of feedback information sequential relationship are shown in the k in the table: the uplink of the corresponding subframe n-k of downlink feedback information among the subframe n.
The relay sub-frame configuration and the up feedback sequential k value table of table 3:TDD subframe uplink-downlink configuration 2
In table 3, just enumerated possible relay sub-frame configuration situation, do not represent the relay sub-frame configuration under this configuration to have only these several kinds, do not represent cited relay sub-frame configuration all can be supported yet.
Embodiment three: the subframe uplink-downlink configuration is a subframe uplink-downlink configuration 3
Subframe uplink-downlink configuration 3 times, descending sub frame 7,8 and 9 can be configured to downlink relay sub-frame, and subframe 2,3 and 4 can be configured to uplink relay subframe.Analysis according to aforementioned subframe uplink-downlink configuration 1 and configuration 2; Can obtain the corresponding relation of different proportion relay sub-frame configuration and corresponding downstream transmission of feedback information sequential for 3 times equally for the subframe uplink-downlink configuration; Be summarized as follows: when comprising subframe 2 and 8 in the subframe configuration set, the feedback information of subframe 2 repeated link uplink business datas transmission is in subframe 8 transmission of current wireless frame; When comprising subframe 3 and 9 in the subframe configuration set, the feedback information of subframe 3 repeated link uplink business datas transmission is in subframe 9 transmission of current wireless frame; When only comprising subframe 3 and 7 in the subframe configuration set, the feedback information of subframe 3 repeated link uplink business datas transmission is in subframe 7 transmission of current wireless frame; When only comprising subframe 3 and 8 in the subframe configuration set, the feedback information of subframe 3 repeated link uplink business datas transmission is in subframe 8 transmission of current wireless frame; When only comprising subframe 3,7 and 8 in the subframe configuration set, the feedback information of subframe 3 repeated link uplink business datas transmission is in the subframe 7 or 8 transmission of current wireless frame; Sub-frame of uplink in the subframe configuration set only comprises subframe 4, and when comprising subframe 9 in the descending sub frame, the feedback information of subframe 4 repeated link uplink business datas transmission is in subframe 9 transmission of current wireless frame.
Above-mentioned sequential relationship is come out with form description; Can obtain 25 kinds of different relay sub-frame configuration as shown in table 4 according to ascending-descending subframes ratio difference, the uplink traffic transmission under each relay sub-frame configuration and transmission of feedback information sequential relationship are shown in the k in the table: the uplink of the corresponding subframe n-k of downlink feedback information among the subframe n.Transmission of feedback information sequential for 9 correspondences of the relay sub-frame configuration index in the table 4; The feedback information of subframe 3 repeated link uplink business datas transmission is in the subframe 7 or 8 transmission of current wireless frame; If the corresponding k value of transmitting in subframe 7 of words is 4; If the corresponding k value of transmitting in subframe 8 of words is 5, these two values only have an existence in the practical operation, but in table 4, all it are enumerated out.
The relay sub-frame configuration and the up feedback sequential k value table of table 4:TDD subframe uplink-downlink configuration 3
In table 4, just enumerated possible relay sub-frame configuration situation, do not represent the relay sub-frame configuration under this configuration to have only these several kinds, do not represent cited relay sub-frame configuration all can be supported yet.
Embodiment four: the subframe uplink-downlink configuration is a subframe uplink-downlink configuration 4
Subframe uplink-downlink configuration 4 times, descending sub frame 4,7,8 and 9 can be configured to downlink relay sub-frame, and subframe 2 and 3 can be configured to uplink relay subframe.Analysis according to aforementioned subframe uplink-downlink configuration 1 and configuration 2; Can obtain the corresponding relation of different proportion relay sub-frame configuration and corresponding downstream transmission of feedback information sequential for 4 times equally for the subframe uplink-downlink configuration; Be summarized as follows: when comprising subframe 2 and 8 in the subframe configuration set, the feedback information of subframe 2 repeated link uplink business datas transmission is in subframe 8 transmission of current wireless frame; When comprising subframe 3 and 9 in the subframe configuration set, the feedback information of subframe 3 repeated link uplink business datas transmission is in subframe 9 transmission of current wireless frame.
Above-mentioned sequential relationship is come out with form description; Can obtain 20 kinds of different relay sub-frame configuration as shown in table 5 according to ascending-descending subframes ratio difference, the uplink traffic transmission under each relay sub-frame configuration and transmission of feedback information sequential relationship are shown in the k in the table: the uplink of the corresponding subframe n-k of downlink feedback information among the subframe n.
The relay sub-frame configuration and the up feedback sequential k value table of table 5:TDD subframe uplink-downlink configuration 4
In table 5, just enumerated possible relay sub-frame configuration situation, do not represent the relay sub-frame configuration under this configuration to have only these several kinds, do not represent cited relay sub-frame configuration all can be supported yet.
Embodiment five: the subframe uplink-downlink configuration is a subframe uplink-downlink configuration 6
Subframe uplink-downlink configuration 6 times, have only descending sub frame 9 can be configured to downlink relay sub-frame.Consider the characteristics of the professional transmission of repeated link, think the no more than downlink relay sub-frame quantity of uplink relay subframe quantity generally speaking, promptly only support 1: 1 uplink and downlink relay sub-frame configuration under this subframe uplink-downlink configuration.That is: when comprising subframe 4 and 9 in the subframe configuration set, the feedback information of subframe 4 repeated link uplink business datas transmission is in subframe 9 transmission of current wireless frame.An example with the 6 times relay sub-frame configuration of subframe uplink-downlink configuration of form description and corresponding downstream transmission of feedback information sequential corresponding relation is as shown in table 6.
The relay sub-frame configuration and the up feedback sequential k value table of table 6:TDD subframe uplink-downlink configuration 6
In table 6, just enumerated possible relay sub-frame configuration situation, do not represent the relay sub-frame configuration under this configuration to have only these several kinds, do not represent cited relay sub-frame configuration all can be supported yet.
During enforcement; Downlink feedback information can have multiple identification means; More excellent; Can identify through indication NDI of the new data among the uplink authorization UL grant and/or the automatic repeat requests HARQ indicating channel of repeated link physical mixed (Relay-Physical HARQ IdicatorChannel is called for short R-PHICH).
When the repeated link downlink feedback information transmission time sequence that using the embodiment of the invention provides is confirmed method; Be not limited to the specific embodiment that the embodiment of the invention provides; Follow-up if subframe uplink-downlink configuration 0,5 can be carried out the repeated link transfer of data, also can use this method, in like manner; In subsequent applications, this method scope of application also possibly be any or the multinomial combination in subframe uplink-downlink configuration 1-4 and the subframe uplink-downlink configuration 6.
Based on same inventive concept, the embodiment of the invention also provides among a kind of time division duplex long evolving system TDD LTE-A repeated link downlink feedback information transmission time sequence to confirm device, is applied to relay station, and concrete structure is as shown in Figure 4, comprising:
In one embodiment, confirm that unit 402 can be further used for:
When the subframe uplink-downlink configuration is subframe uplink-downlink configuration 1, comprise subframe 3 and in central stepchild's frame configuration set at 9 o'clock, confirm that sequential is: the feedback information of the repeated link uplink business datas transmission that subframe 3 is corresponding is in subframe 9 transmission of current wireless frame;
In the middle of comprise in stepchild's frame configuration set subframe 4 with 8 o'clock, confirm that sequential is: the feedback information of the repeated link uplink business datas transmission that subframe 8 is corresponding transmits in the subframe 4 of next radio frames.
In one embodiment, confirm that unit 402 can be further used for:
When the subframe uplink-downlink configuration is subframe uplink-downlink configuration 2, comprise subframe 2 and in central stepchild's frame configuration set at 8 o'clock, confirm that sequential is: the feedback information of the repeated link uplink business datas transmission that subframe 2 is corresponding is in subframe 8 transmission of current wireless frame;
In the middle of comprise in stepchild's frame configuration set subframe 3 with 7 o'clock, confirm that sequential is: the feedback information of the repeated link uplink business datas transmission that subframe 7 is corresponding transmits in the subframe 3 of next radio frames.
In one embodiment, confirm that unit 402 can be further used for:
When the subframe uplink-downlink configuration is subframe uplink-downlink configuration 3, comprise subframe 2 and in central stepchild's frame configuration set at 8 o'clock, confirm that sequential is: the feedback information of the repeated link uplink business datas transmission that subframe 2 is corresponding is in subframe 8 transmission of current wireless frame;
In the middle of comprise in stepchild's frame configuration set subframe 3 with 9 o'clock, confirm that sequential is: the feedback information of the repeated link uplink business datas transmission that subframe 3 is corresponding transmits in the subframe 9 of current wireless frame;
In the middle of only comprise in stepchild's frame configuration set subframe 3 with 7 o'clock, confirm that sequential is: the feedback information of the repeated link uplink business datas transmission that subframe 3 is corresponding transmits in the subframe 7 of current wireless frame;
In the middle of only comprise in stepchild's frame configuration set subframe 3 with 8 o'clock, confirm that sequential is: the feedback information of the repeated link uplink business datas transmission that subframe 3 is corresponding transmits in the subframe 8 of current wireless frame;
In the middle of only comprise subframe 3,7 and in stepchild's frame configuration set at 8 o'clock, confirm that sequential is: the feedback information of the repeated link uplink business datas transmission that subframe 3 is corresponding is in the subframe 7 or 8 transmission of current wireless frame;
In the middle of only comprise in stepchild's frame configuration set subframe 4 with 9 o'clock, confirm that sequential is: the feedback information of the repeated link uplink business datas transmission that subframe 4 is corresponding transmits in the subframe 9 of current wireless frame.
In one embodiment, confirm that unit 402 can be further used for:
When the subframe uplink-downlink configuration is subframe uplink-downlink configuration 4, comprise subframe 2 and in central stepchild's frame configuration set at 8 o'clock, confirm that sequential is: the feedback information of the repeated link uplink business datas transmission that subframe 2 is corresponding is in subframe 8 transmission of current wireless frame;
In the middle of comprise in stepchild's frame configuration set subframe 3 with 9 o'clock, confirm that sequential is: the feedback information of the repeated link uplink business datas transmission that subframe 3 is corresponding transmits in the subframe 9 of current wireless frame.
In one embodiment, confirm that unit 402 can be further used for:
When said subframe uplink-downlink configuration is subframe uplink-downlink configuration 6, comprise subframe 4 and in central stepchild's frame configuration set at 9 o'clock, confirm that sequential is: the feedback information of the repeated link uplink business datas transmission that subframe 4 is corresponding is in subframe 9 transmission of current wireless frame.
From above description, can find out that the present invention has realized following technique effect:
The foregoing description is gathered according to the relay sub-frame configuration under the subframe uplink-downlink configuration in the TDD LTE-A system; Confirm repeated link downlink feedback information transmission time sequence; For the base station, when can know the feeding back downlink feedback information, the corresponding relay station also can know when receive the downlink feedback information that send the base station; Fully guarantee reliability of data transmission between base station and the relay station; The problem of having avoided repeated link HARQ efficiency of transmission to reduce, thus avoid the transfer of data of relay station subordinate terminal is impacted, guaranteed backwards compatibility for the terminal.
Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the storage device and carry out, and in some cases, can carry out step shown or that describe with the order that is different from here by calculation element; Perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1. repeated link downlink feedback information transmission time sequence is confirmed method among the time division duplex advanced long-term evolution system TDD LTE-A, it is characterized in that, comprising:
According to the set of the relay sub-frame configuration under the subframe uplink-downlink configuration in the TDD LTE-A system, confirm repeated link downlink feedback information transmission time sequence;
Wherein, said sequential refers to the sequential relationship of transmission of repeated link uplink business data and the transmission of corresponding downlink feedback information.
2. method according to claim 1 is characterized in that, also comprises:
The base station receives the repeated link uplink business data that relay station sends, and confirms the subframe position of said downlink feedback information transmission and in said subframe, sends said downlink feedback information according to said sequential; And
Said relay station is confirmed said downlink feedback information transmission subframe position and in said subframe, is received said downlink feedback information according to said sequential.
3. method according to claim 1 is characterized in that, said definite repeated link downlink feedback information transmission time sequence comprises:
When said subframe uplink-downlink configuration is subframe uplink-downlink configuration 1; When comprising subframe 3 and 9 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 3 corresponding repeated link uplink business datas transmit is in subframe 9 transmission of current wireless frame;
When comprising subframe 4 and 8 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 8 corresponding repeated link uplink business datas transmit is in subframe 4 transmission of next radio frames.
4. method according to claim 1 is characterized in that, said definite repeated link downlink feedback information transmission time sequence comprises:
When said subframe uplink-downlink configuration is subframe uplink-downlink configuration 2; When comprising subframe 2 and 8 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 2 corresponding repeated link uplink business datas transmit is in subframe 8 transmission of current wireless frame;
When comprising subframe 3 and 7 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 7 corresponding repeated link uplink business datas transmit is in subframe 3 transmission of next radio frames.
5. method according to claim 1 is characterized in that, said definite repeated link downlink feedback information transmission time sequence comprises:
When said subframe uplink-downlink configuration is subframe uplink-downlink configuration 3; When comprising subframe 2 and 8 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 2 corresponding repeated link uplink business datas transmit is in subframe 8 transmission of current wireless frame;
When comprising subframe 3 and 9 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 3 corresponding repeated link uplink business datas transmit is in subframe 9 transmission of current wireless frame;
When only comprising subframe 3 and 7 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 3 corresponding repeated link uplink business datas transmit is in subframe 7 transmission of current wireless frame;
When only comprising subframe 3 and 8 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 3 corresponding repeated link uplink business datas transmit is in subframe 8 transmission of current wireless frame;
When only comprising subframe 3,7 and 8 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 3 corresponding repeated link uplink business datas transmit is in the subframe 7 or 8 transmission of current wireless frame;
When only comprising subframe 4 and 9 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 4 corresponding repeated link uplink business datas transmit is in subframe 9 transmission of current wireless frame.
6. method according to claim 1 is characterized in that, said definite repeated link downlink feedback information transmission time sequence comprises:
When said subframe uplink-downlink configuration is subframe uplink-downlink configuration 4; When comprising subframe 2 and 8 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 2 corresponding repeated link uplink business datas transmit is in subframe 8 transmission of current wireless frame;
When comprising subframe 3 and 9 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 3 corresponding repeated link uplink business datas transmit is in subframe 9 transmission of current wireless frame.
7. method according to claim 1 is characterized in that, said definite repeated link downlink feedback information transmission time sequence comprises:
When said subframe uplink-downlink configuration is subframe uplink-downlink configuration 6; When comprising subframe 4 and 9 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 4 corresponding repeated link uplink business datas transmit is in subframe 9 transmission of current wireless frame.
8. according to each described method of claim 1 to 7; It is characterized in that said downlink feedback information identifies through indication NDI of the new data among the uplink authorization UL grant and/or the automatic repeat requests HARQ indicating channel of repeated link physical mixed R-PHICH.
9. repeated link downlink feedback information transmission time sequence is confirmed device among the time division duplex long evolving system TDD LTE-A, it is characterized in that, comprising:
Selected cell is used for selecting the relay sub-frame configuration set under the subframe uplink-downlink configuration in TDD LTE-A system;
Confirm the unit, be used for confirming repeated link downlink feedback information transmission time sequence according to the set of the relay sub-frame configuration under the subframe uplink-downlink configuration of selecting; Wherein, said sequential refers to the sequential relationship of transmission of repeated link uplink business data and the transmission of corresponding downlink feedback information.
10. device according to claim 9 is characterized in that, said definite unit is further used for:
When said subframe uplink-downlink configuration is subframe uplink-downlink configuration 1; When comprising subframe 3 and 9 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 3 corresponding repeated link uplink business datas transmit is in subframe 9 transmission of current wireless frame; And
When comprising subframe 4 and 8 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 8 corresponding repeated link uplink business datas transmit is in subframe 4 transmission of next radio frames.
11. device according to claim 9 is characterized in that, said definite unit is further used for:
When said subframe uplink-downlink configuration is subframe uplink-downlink configuration 2; When comprising subframe 2 and 8 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 2 corresponding repeated link uplink business datas transmit is in subframe 8 transmission of current wireless frame;
When comprising subframe 3 and 7 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 7 corresponding repeated link uplink business datas transmit is in subframe 3 transmission of next radio frames.
12. device according to claim 9 is characterized in that, said definite unit is further used for:
When said subframe uplink-downlink configuration is subframe uplink-downlink configuration 3; When comprising subframe 2 and 8 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 2 corresponding repeated link uplink business datas transmit is in subframe 8 transmission of current wireless frame;
When comprising subframe 3 and 9 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 3 corresponding repeated link uplink business datas transmit is in subframe 9 transmission of current wireless frame;
When only comprising subframe 3 and 7 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 3 corresponding repeated link uplink business datas transmit is in subframe 7 transmission of current wireless frame;
When only comprising subframe 3 and 8 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 3 corresponding repeated link uplink business datas transmit is in subframe 8 transmission of current wireless frame;
When only comprising subframe 3,7 and 8 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 3 corresponding repeated link uplink business datas transmit is in the subframe 7 or 8 transmission of current wireless frame;
When only comprising subframe 4 and 9 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 4 corresponding repeated link uplink business datas transmit is in subframe 9 transmission of current wireless frame.
13. device according to claim 9 is characterized in that, said definite unit is further used for:
When said subframe uplink-downlink configuration is subframe uplink-downlink configuration 4; When comprising subframe 2 and 8 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 2 corresponding repeated link uplink business datas transmit is in subframe 8 transmission of current wireless frame;
When comprising subframe 3 and 9 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 3 corresponding repeated link uplink business datas transmit is in subframe 9 transmission of current wireless frame.
14. device according to claim 9 is characterized in that, said definite unit is further used for:
When said subframe uplink-downlink configuration is subframe uplink-downlink configuration 6; When comprising subframe 4 and 9 in the said relay sub-frame configuration set, confirm that said sequential is: the feedback information that subframe 4 corresponding repeated link uplink business datas transmit is in subframe 9 transmission of current wireless frame.
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| CN103580829A (en) * | 2012-08-10 | 2014-02-12 | 中兴通讯股份有限公司 | PHICH processing method and device in TDD mode |
| CN110050422A (en) * | 2016-12-30 | 2019-07-23 | 华为技术有限公司 | Communication means, the network equipment and terminal device |
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| CN103384179A (en) * | 2012-05-04 | 2013-11-06 | 电信科学技术研究院 | Uplink/downlink configuring method and device used in system using time division duplex communication mode |
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| US9622217B2 (en) | 2012-05-04 | 2017-04-11 | China Academy Of Telecommunications Technology | Uplink/downlink configuration method and device in system using time division duplex communication mode |
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| CN103580829A (en) * | 2012-08-10 | 2014-02-12 | 中兴通讯股份有限公司 | PHICH processing method and device in TDD mode |
| CN103580829B (en) * | 2012-08-10 | 2018-11-20 | 南京中兴新软件有限责任公司 | A kind of PHICH treating method and apparatus under tdd mode |
| CN110050422A (en) * | 2016-12-30 | 2019-07-23 | 华为技术有限公司 | Communication means, the network equipment and terminal device |
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| CN102420682B (en) | 2016-04-13 |
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