CN104753649B - Method, communication equipment and mobile communication system for generating and sending feedback information - Google Patents
Method, communication equipment and mobile communication system for generating and sending feedback information Download PDFInfo
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Abstract
Some embodiments of the present disclosure are related to the method for generating and sending feedback information, communication equipment and mobile communication system.Specifically, some embodiments use affirmative acknowledgement（ACK）Downlink traffic is improved as the feedback information of the special subframe in feedback window.
Description
Technical field
Wireless communication technique is related in general in terms of the disclosure, and more particularly, to generates and send feedback information
Method, communication equipment and mobile communication system.
Background technology
Mobile communication system, such as LTE-TDD（Long Term Evolution-Time Division Duplex, it is long
Phase evolution-time division duplex）System uses HARQ（Hybrid Automatic Repeat Request, mixed automatic retransfer are asked
It asks）To improve the reliability of data transmission.In the technical solution using HARQ, communication equipment, such as user equipment（UE,
User‐Equipment）, to the downlink packet that receives into row decoding, and to base station if successfully decoded（BS,
Base Station）Feeding back ACK（ACKnowledgment, affirmative acknowledgement）, to base station feedback NACK if decoding failure
（Negative ACKnowledgment, negative response）.Base station will retransmit the data packet upon receiving the nacks.
Disclosure
The aspect of the disclosure describes the method for generating and sending feedback information, communication equipment and mobile communication system.
According to one aspect of the disclosure, a kind of method for generating feedback information in mobile communication system includes：
Receive downlink transmission；When the feedback information generated for multiple downlink subframes in feedback window is affirmative acknowledgement（ACK）
When, generate affirmative acknowledgement（ACK）Feedback information as the special subframe in the feedback window.
According to another aspect of the disclosure, the method for sending feedback information in mobile communication system includes：It connects
Accept uplink transmission；When the feedback information generated for multiple downlink subframes in feedback window is affirmative acknowledgement（ACK）When,
Generate affirmative acknowledgement（ACK）Feedback information as the special subframe in the feedback window；It is controlled and is believed using physical uplink link
Road format 1b channel selections（PUCCH format1b channel selection）To send the feedback letter of the feedback window
Breath.
According to another aspect of the disclosure, include for the communication equipment of mobile communication system：Receiving module, for connecing
Accept uplink transmission；Feedback information generation module, for when the feedback generated for multiple downlink subframes in feedback window
Information is affirmative acknowledgement（ACK）When, generate affirmative acknowledgement（ACK）Feedback information as the special subframe in the feedback window.
According to another aspect of the disclosure, mobile communication system includes base station and user equipment.Base station is configured to send out
Send downlink transmission；And user equipment is configured to receive the downlink transmission, and when in feedback window
Multiple downlink subframes generate feedback information be affirmative acknowledgement（ACK）When, generate affirmative acknowledgement（ACK）As the feedback window
In special subframe feedback information.
Description of the drawings
In the following description, the aspect of the disclosure will be described with reference to following attached drawing.
Fig. 1 is the schematic diagram for the mobile communication system for including base station and user equipment.
Fig. 2 is the schematic diagram of the frame structure of LTE-TDD systems.
Fig. 3 is to show sub-frame of uplink and downlink/special son in feedback window for LTE-TDD uplink/downlinks configuration 2
The associated schematic diagram of frame.
Fig. 4 is the stream of the method for generating feedback information in mobile communication system according to one aspect of the disclosure
Cheng Tu.
Fig. 5 is the schematic diagram of the communication equipment for mobile communication system according to one aspect of the disclosure.
Specific implementation mode
Fig. 1 show include base station and user equipment mobile communication system.Physical channel between user equipment and base station
Downlink channel and uplink channel can be divided into.Downlink channel includes physical down link sharing channel
（PDSCH, Physical Downlink Shared Channel）For bearing downlink link shared channels（DL-SCH,
Downlink Shared Channel）And paging channel（PCH, Paging Channel）And uplink channel includes object
Manage uplink control channel（PUCCH, Physical Uplink Control Channel）For carrying in response to downlink chain
The feedback information of road transmission, scheduling request（SR, Scheduling Request）And channel quality indicator（CQI, Channel
Quality Indicator）.
Fig. 2 shows the frame structures of LTE-TDD systems.In this example, a radio frames（radio frame）, i.e. system
Frame, length be, for example, 10ms, and each radio frames are divided into the field that two length are 5ms.Each field includes 8
Length is the time slot and 3 special domains of 0.5ms, i.e. descending pilot frequency time slot（DwPTS, Downlink Pilot frequency
Time Slot）, protection interval（GP, Gap of Protection,）And uplink pilot time slot（UpPTS, Uplink Pilot
frequency Time Slot）.As shown, each radio frames are by 10 subframes（subframe）Composition, this 10 subframe packets
It includes 2 special subframes and each special subframe is made of 3 above-mentioned special domains.In this example, the length of 3 special domains
For 1ms.In one example, chronomere Ts=1/ (15000 × 2048) second.
LTE-TDD on same carrier wave by temporal separation transmit and receive channel, therefore can have different uplinks/
The frame structure of downstream arrangements.Table 1 shows 7 kinds of different LTE-TDD uplink/downlinks configurations, wherein D represents downlink subframe, U generations
Table sub-frame of uplink, S represent it is above-mentioned include 3 special domains special subframe.
Table 1
As shown in table 1,2,1 frame is configured for LTE-TDD uplink/downlinks（That is system-frame）There is subframe in 10 interior subframes
2 and 7 transmit for uplink, and subframe 0,3,4,5,8,9 is used for special subframe for downlink transmission and subframe 1 and 6
Transmission.
In LTE versions, such as Rel-8/9, downlink association index is disclosed in the following table 2, and uplink is shown wherein
Subframe n is associated with downlink/special subframe n-k's.It specifically, will be upper after completing to the decoding of downlink/special subframe n-k
Whether the data transmitted to base station feedback in the downlink/special subframe n-k on row subframe n need the signaling being retransmitted.Table 2 is shown
The value of k, the uplink and downlink configuration dependent on mobile communication system and specific subframe numbers n.
Table 2
As shown in table 2, it is 8,7,4,6 to configure the value of 2, k for LTE-TDD uplink/downlinks, i.e., sub-frame of uplink 2 is to it
Preceding 8th, 7,4,6 downlink/special subframe is fed back.For example, for sfn（System Frame Number, system frame number）
=m, subframe（Subframe）=2 sub-frame of uplink, feedback are associated with following downlink/special subframe：
（Sfn=m-1, subframe=4）,
（Sfn=m-1, subframe=5）,
（Sfn=m-1, subframe=8）,
（Sfn=m-1, subframe=6）；
For sfn（System Frame Number）=m, the sub-frame of uplink of subframe=7, feedback are associated with following downlink/special subframe：
（Sfn=m-1, subframe=9）,
（Sfn=m, subframe=0）,
（Sfn=m, subframe=3）,
（Sfn=m, subframe=1）.
Fig. 3 is shown for LTE-TDD uplink/downlinks configuration 2, sub-frame of uplink and downlink/special subframe in feedback window
Association.
In LTE versions, such as Rel-8/9, define a kind of multiplexing ACK/NACK feedback models.The pattern utilizes different
PUCCH（Physical uplink control channel）Different modulation symbol is indicated by downlink/special subframe on channel and the channel
The feedback states that are formed of feedback information.Specifically, for LTE-TDD uplink/downlinks configuration 2, multiplexing ACK/NACK feedbacks
Pattern indicates feedback states using the 2bit information b (0) and b (1) of the index of PUCCH channels and PUCCH format 1b, this also by
Referred to as PUCCH format 1b channel selections（PUCCH format1b channel selection）.Feedback information includes：ACK、
NACK and DTX（Discontinuous Transmission, discontinuous transmission）.
As described previously for LTE-TDD uplink/downlinks configuration 2, need in 1 sub-frame of uplink to 4 downlinks/special
Subframe is fed back, as shown in Figure 3.Table 3 is the ACK/NACK multiplexing transmission mapping forms in LTE Rel-8/9.In the table
In, feedback information（That is, HARQ-ACK, automatic repeat request response）HARQ‐ACK(0)、HARQ‐ACK(1)、HARQ‐ACK(2)、
HARQ-ACK (3) corresponds to 4 downlink/special subframes in feedback window respectively.Feedback window refers to being associated with same uplink
Multiple downlink/special subframes of frame.In the table,Indicate selection PUCCH channel resources and 2bit information b (0) and
B (1) is used to form different modulation symbols.It can be understood that table 3 can be used for the Rel-10 of any compatible LTE Rel-8/9
Or more system in.
Table 3
It is configured to 2, when downlink transmission uses normal cyclic prefix pattern in LTE-TDD uplink/downlinks, special son
Frame is configured to 0 either 5 either when downlink transmission is configured to 0 or 4 using extended cyclic prefix pattern special subframe
In the case of, when all downlink subframes for the feedback window transmitted in physical down link sharing channel all by decoding success when, will
Generate following feedback information：
HARQ-ACK (0)=ACK,
HARQ-ACK (1)=ACK,
HARQ-ACK (2)=ACK,
HARQ‐ACK(3)=DTX。
With reference to Fig. 3, for the sub-frame of uplink 2 of sfn=m, these feedback informations correspond respectively to the feedback window of sfn=m-1
In subframe 4,5,8,6.It can be seen that DTX will be fed back by being directed to special subframe 6 at this time（Discontinuous
Transmission）.This is because in the special subframe of have different characteristics sub-frame configuration and different cyclic prefix modes
Descending pilot frequency time slot have specific length, as shown in table 4 below.Under normal cyclic prefix pattern, special subframe configuration
For 0 either 5 either when special subframe is configured to 0 or 4 under extended cyclic prefix pattern, descending pilot frequency time slot is due to spy
Fixed length and be consequently not used for physical down link sharing channel transmission.
For sub-frame of uplink 7, feedback is similar with sub-frame of uplink 2, corresponds to the upper of the subframe 9,0,3,1 in feedback window
Row subframe 7 also will feedback（ACK、ACK、ACK、DTX）, wherein subframe 1 is special subframe.
Table 4
According to above-mentioned, according to table 3 and Fig. 3, generation is directed to downlink/special subframe（4、5、8、6）With（9、0、3、1）It is anti-
Feedforward information is HARQ-ACK (0)=ACK, HARQ-ACK (1)=ACK, HARQ-ACK (2)=ACK, HARQ-ACK (3)=DTX.These
Feedback information will corresponding n (P1U) CCH=n (P1U) CCH, 1, coding b (0), b (1)=1,0.However,（ACK、ACK、ACK、DTX）
By in table 3（ACK、ACK、NACK/DTX、ACK）With（ACK、ACK、NACK/DTX、NACK/DTX）Channel having the same
Selection and coding.In this way, base station will be unable to distinguish for example（ACK、ACK、ACK、DTX）With（ACK、ACK、NACK/DTX、NACK/
DTX）, to judge downlink subframe 8 or 3 by such as user equipment garbled-reception and dispatch retransmitted.This will cause not needing
Re-transmission and reduce the traffic of downlink.
Fig. 4 is the flow chart of the method that feedback information is generated in LTE-TDD systems according to one aspect of the disclosure.
As shown in figure 4, in process 301, downlink transmission is received, in process 302, generates and corresponds to feedback window
Downlink subframe feedback information, in process 303, when judging that the feedback information of all downlink subframes of feedback window is all willing
Determine response（ACK）When, generate affirmative acknowledgement（ACK）Feedback information as the special subframe in the feedback window.To generate
HARQ-ACK (0), HARQ-ACK (1), HARQ-ACK (2), HARQ-ACK (3) be（ACK、ACK、ACK、ACK）, correspond to
First entry of table 3, to n (P1U) CCH=n (P1U) CCH, 1 is selected, coding b (0), b (1)=1, and 1, it is possible thereby to keep away
Exempt to retransmit.In this example, under normal cyclic prefix pattern, special subframe is configured to 0 or 5, and in extended cyclic prefix
Under pattern, special subframe is configured to 0 or 4.
According to another aspect of the disclosure, a kind of side for generating feedback information in mobile communication system is disclosed
Method.In this example, method includes：Receive downlink transmission；And it is given birth to when for multiple downlink subframes in feedback window
At feedback information be affirmative acknowledgement（ACK）When, generate affirmative acknowledgement（ACK）As the anti-of the special subframe in the feedback window
Feedforward information.
In one example, the mobile communication system can be LTE-TDD systems, and the LTE-TDD systems is upper
Row/downstream arrangements are 2.
In another example, if the downlink transmission uses normal cyclic prefix pattern, special subframe to match
It is set to 0 or 5, and wherein, if the downlink transmission uses extended cyclic prefix pattern, special subframe to be configured to
0 or 4.
In another example, feedback information is：Affirmative acknowledgement, affirmative acknowledgement, affirmative acknowledgement, affirmative acknowledgement（ACK、
ACK、ACK、ACK）.
According to another aspect of the disclosure, a kind of side for sending feedback information in mobile communication system is disclosed
Method.In this example, method includes：Receive downlink transmission；When what is generated for multiple downlink subframes in feedback window
Feedback information is affirmative acknowledgement（ACK）When, generate affirmative acknowledgement（ACK）Feedback letter as the special subframe in the feedback window
Breath；And send the feedback information of the feedback window using physical uplink control channel format 1b channel selections.
In one example, the mobile communication system can be LTE-TDD systems, and the LTE-TDD systems is upper
Row/downstream arrangements are 2.
In another example, if the downlink transmission uses normal cyclic prefix pattern, special subframe to match
It is set to 0 or 5, and wherein, if the downlink transmission uses extended cyclic prefix pattern, special subframe to be configured to
0 or 4.
In another example, feedback information is：Affirmative acknowledgement, affirmative acknowledgement, affirmative acknowledgement, affirmative acknowledgement（ACK、
ACK、ACK、ACK）.
In another example, the feedback information is sent according to mapping form.The mapping form can be LTERel-
ACK/NACK multiplexing transmission mapping forms in 8/9.
It is understood that when physical uplink control channel includes other uplink controls in addition to ACK/NACK
Information processed（UCI, Uplink Control Information）, such as scheduling request（SR, Scheduling Request）Or
Channel quality indicator（CQI, Channel Quality Indicator）When, because using different coding modes, base station will
Feedback states will not be obscured.
Fig. 5 is the communication equipment for mobile communication system such as LTE-TDD systems according to one aspect of the disclosure
Schematic diagram.As shown, the communication equipment includes:Receiving module, for receiving downlink transmission；Feedback information generates mould
Block, for being affirmative acknowledgement when the feedback information generated for multiple downlink subframes in feedback window（ACK）When, generate affirmative
Response（ACK）Feedback information as the special subframe in the feedback window.
In one example, which may further include sending module, for using physical uplink link control
Channel format 1b channel selections processed send the feedback information of the feedback window.
In one example, the mobile communication system can be LTE-TDD systems, and the LTE-TDD systems is upper
Row/downstream arrangements are 2.
In another example, if the downlink transmission uses normal cyclic prefix pattern, special subframe to match
It is set to 0 or 5, and wherein, if the downlink transmission uses extended cyclic prefix pattern, special subframe to be configured to
0 or 4.
In another example, feedback information is：Affirmative acknowledgement, affirmative acknowledgement, affirmative acknowledgement, affirmative acknowledgement（ACK、
ACK、ACK、ACK）.
In another example, the feedback information is sent according to mapping form.The mapping form can be LTE
ACK/NACK multiplexing transmission mapping forms in Rel-8/9.
In another example, communication equipment can be user equipment or trunk desk.
According to another aspect of the disclosure, open mobile communication system.The mobile communication system includes base station and user
Equipment.Base station is configured to send downlink transmission and user equipment is configured to receive the downlink transmission, and
And when the feedback information generated for multiple downlink subframes in feedback window is affirmative acknowledgement（ACK）When, generate affirmative acknowledgement
（ACK）Feedback information as the special subframe in the feedback window.
In one example, user equipment is further configured to select using physical uplink control channel format 1b channels
It selects to send the feedback information of the feedback window.
In one example, mobile communication system can be LTE-TDD systems, and the uplink of the LTE-TDD systems/under
Row is configured to 2.
In another example, if the downlink transmission uses normal cyclic prefix pattern, special subframe to match
It is set to 0 or 5, and wherein, if the downlink transmission uses extended cyclic prefix pattern, special subframe to be configured to
0 or 4.
In another example, feedback information is：Affirmative acknowledgement, affirmative acknowledgement, affirmative acknowledgement, affirmative acknowledgement（ACK、
ACK、ACK、ACK）.
In another example, the feedback information is sent according to mapping form.The mapping form can be LTE
ACK/NACK multiplexing transmission mapping forms in Rel-8/9.
In this manner it is achieved that avoiding unnecessary re-transmission, the traffic of downlink is improved.
Although the disclosure has shown and described about one or more executive modes, based on to the specification and drawings
Reading and understanding, equivalent change and modification will be obvious from others skilled in the art.In addition, although may be about multiple
Only one in executive mode discloses the special characteristic of the disclosure, but for any given or specific application be it is desired and
Advantageous, this feature can other features be combined with one or more of other executive modes.
Claims (14)
1. a kind of method for generating feedback information in mobile communication system, which is characterized in that including：
Receive downlink transmission；
When the feedback information generated for multiple downlink subframes in feedback window is affirmative acknowledgement (ACK), generation is answered certainly
Answer the feedback information of (ACK) as the special subframe in the feedback window, wherein the mobile communication system is long term evolution-
Time division duplex (LTE-TDD) system, and the uplink/downlink of the LTE-TDD systems is configured to 2, wherein if the downlink chain
Road transmission uses normal cyclic prefix pattern, then special subframe is configured to 0 or 5, and wherein, if the downlink passes
Defeated to use extended cyclic prefix pattern, then special subframe is configured to 0 or 4.
2. the method for claim 1, wherein the feedback information is：Affirmative acknowledgement, affirmative acknowledgement, is agreed at affirmative acknowledgement
Determine response (ACK, ACK, ACK, ACK).
3. a kind of method for sending feedback information in mobile communication system, which is characterized in that including：
Receive downlink transmission；
When the feedback information generated for multiple downlink subframes in feedback window is affirmative acknowledgement (ACK), generation is answered certainly
Answer the feedback information of (ACK) as the special subframe in the feedback window；
It uses physical uplink control channel format 1b channel selections (PUCCH format 1b channel selection)
To send the feedback information of the feedback window, wherein the mobile communication system is long term evolution-time division duplex (LTE-
TDD) system, and the uplink/downlink of the LTE-TDD systems is configured to 2, wherein if the downlink transmission is using just
Normal cyclic prefix mode, then special subframe be configured to 0 or 5, and wherein, if the downlink transmission is followed using extension
Ring prefix pattern, then special subframe be configured to 0 or 4.
4. method as claimed in claim 3, wherein the feedback information for each subframe in the feedback window is：Agree
Determine response, affirmative acknowledgement, affirmative acknowledgement, affirmative acknowledgement (ACK, ACK, ACK, ACK).
5. method as claimed in claim 3, wherein the feedback information is sent according to mapping form.
6. a kind of communication equipment for mobile communication system, which is characterized in that including：
Receiving module, for receiving downlink transmission；
Feedback information generation module, for being to answer certainly when the feedback information generated for multiple downlink subframes in feedback window
When answering (ACK), feedback information of the affirmative acknowledgement (ACK) as the special subframe in the feedback window is generated, wherein the movement
Communication system is long term evolution-time division duplex (LTE-TDD) system, and the uplink/downlink of the LTE-TDD systems is configured to 2,
Wherein, if the downlink transmission uses normal cyclic prefix pattern, special subframe to be configured to 0 or 5, and its
In, if the downlink transmission uses extended cyclic prefix pattern, special subframe to be configured to 0 or 4.
7. communication equipment as claimed in claim 6, further includes：
Sending module, for using physical uplink control channel format 1b channel selections (PUCCH format 1b
Channel selection) send the feedback information of the feedback window.
8. communication equipment as claimed in claim 6, wherein for the feedback information of each subframe in the feedback window
It is：Affirmative acknowledgement, affirmative acknowledgement, affirmative acknowledgement, affirmative acknowledgement (ACK, ACK, ACK, ACK).
9. communication equipment as claimed in claim 8, wherein the feedback information is sent according to mapping form.
10. communication equipment as claimed in claim 6, wherein the communication equipment is user equipment or trunk desk.
11. a kind of mobile communication system, which is characterized in that including：
Base station is configured to send downlink transmission,
User equipment is configured to receive the downlink transmission, and is given birth to when for multiple downlink subframes in feedback window
At feedback information be affirmative acknowledgement (ACK) when, generate affirmative acknowledgement (ACK) as the anti-of the special subframe in the feedback window
Feedforward information, wherein the mobile communication system is long term evolution-time division duplex (LTE-TDD) system, and the LTE-TDD systems
The uplink/downlink of system is configured to 2, wherein if the downlink transmission uses normal cyclic prefix pattern, special subframe
It is configured to 0 or 5, and wherein, if the downlink transmission uses extended cyclic prefix pattern, special subframe configuration
It is 0 or 4.
12. mobile communication system as claimed in claim 11, wherein the user equipment is further configured to using physically
Uplink Control Channel format 1b channel selections (PUCCH format 1b channel selection) send the feedback
The feedback information of window.
13. mobile communication system as claimed in claim 11, wherein for the feedback of each subframe in the feedback window
Information is：Affirmative acknowledgement, affirmative acknowledgement, affirmative acknowledgement, affirmative acknowledgement (ACK, ACK, ACK, ACK).
14. mobile communication system as claimed in claim 13, wherein the feedback information is sent according to mapping form.
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| CN107040342B (en) * | 2016-02-03 | 2020-09-01 | 电信科学技术研究院 | Method and equipment for transmitting uplink control information |
| CN106301739B (en) * | 2016-08-16 | 2019-08-02 | 宇龙计算机通信科技(深圳)有限公司 | Uplink HARQ feedback method, apparatus and base station based on dynamic frame structure |
| CN110557184B (en) * | 2018-05-31 | 2021-11-16 | 阿里巴巴集团控股有限公司 | Communication method and device based on relay equipment and communication method and device between terminal and base station |
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