CN103427962A

CN103427962A - HARQ feedback method of downlink data

Info

Publication number: CN103427962A
Application number: CN2013100501462A
Authority: CN
Inventors: 赵铮; 李迎阳; 孙程君
Original assignee: Beijing Samsung Telecommunications Technology Research Co Ltd; Samsung Electronics Co Ltd
Current assignee: Beijing Samsung Telecommunications Technology Research Co Ltd; Samsung Electronics Co Ltd
Priority date: 2012-05-18
Filing date: 2013-02-08
Publication date: 2013-12-04
Also published as: WO2013172691A1

Abstract

The invention discloses an HARQ feedback method of downlink data. The method comprises the following steps that: in a traffic adaptive TDD system, when actual uplink and downlink configuration of the system changes dynamically, uplink and downlink configuration which is followed by HARQ ACK feedback timing of downlink subframes will also change accordingly. According to the HARQ feedback method of the downlink data of the invention, feedback timing is performed on the HARQ ACK of the downlink subframes in a certain range of configuration change boundary points. With the HARQ feedback method of the downlink data adopted, the HARQ ACK of more downlink subframes can obtain feedback, and therefore, physical resources of the downlink subframes can be effectively saved.

Description

A kind of HARQ feedback method of downlink data

Technical field

The present invention relates to wireless communication technology field, relate in particular in service traffics self adaptation TDD system, when the TDD uplink-downlink configuration of community (Cell) during with the dynamic change of up-downgoing traffic carrying capacity, the feedback method of replying (ACK:ACKnowledgment) and negative response (NACK:Negative ACKnowledgment) of Physical Downlink Shared Channel (PDSCH, Physical Downlink Shared Channel).

Background technology

Long Term Evolution (LTE, Long Term Evolution) technical support Frequency Division Duplexing (FDD) (FDD, Frequency Division Duplexing) and two kinds of duplex modes of TDD.The frame structure schematic diagram of the TDD system that Fig. 1 is LTE.The length of each radio frames is 10 milliseconds (ms); be divided into the field that two length are 5ms; each field comprises time slot that 8 length are 0.5ms and the special domain of 3 1ms; 3 special domain are respectively descending pilot frequency time slot (DwPTS; Downlink pilot time slot), protection interval (GP; Guard period) and uplink pilot time slot (UpPTS, Uplink pilot time slot), each subframe consists of two continuous time slots.

Transmission in the TDD system comprises: by base station to the transmission (being called descending) of subscriber equipment (UE, User Equipment) and the transmission (being called up) to base station by UE.Frame structure based on shown in Fig. 1, uplink and downlink share 10 subframes in every 10ms time, and each subframe or configuration to descending, are called sub-frame of uplink by configuration to up subframe to up or configuration, and configuration is called to descending sub frame to descending subframe.Support upstream and downstream configuration in 7 in the TDD system, as shown in table 1, D represents descending sub frame, and U represents sub-frame of uplink, and S represents the above-mentioned special subframe that comprises 3 special domain.

Table 1

In order to improve user's transmission rate, the LTE technology of highest version has been proposed again.The LTE TDD system of highest version and LTE have identical HARQ transmit timing.The HARQ transmit timing relation of the downlink data in the LTE of brief description highest version.

The HARQ of PDSCH (HARQ-ACK) information of replying can be gone shared channel (PUSCH physically, Physical Uplink Shared Channel) or Physical Uplink Control Channel (PUCCH, Physical Uplink ControlChannel) transmission.Timing relationship for PDSCH to PUCCH/PUSCH, suppose that UE is at the PUCCH/PUSCH of sub-frame of uplink n feedback HARQ-ACK, and this PUCCH/PUSCH has indicated the HARQ-ACK that the interior PDSCH of descending sub frame n-k or SPS discharge.The value here defines in table 2, and K is the set of M element, be called as descending relation integration (Downlink association set) relevant to uplink-downlink configuration the subframe sequence number.Hereinafter PDSCH or SPS are discharged into to this PDSCH or SPS and discharge timing relationship between HARQ-ACK referred to as PDSCH HARQ regularly.

Table 2

Along with the raising of user to the transfer of data rate requirement, at LTE more in the discussion of highest version, people have proposed the adaptive TDD technology of traffic carrying capacity, ratio by dynamic adjustment sub-frame of uplink and descending sub frame, make current uplink-downlink configuration more meet the ratio of current upstream traffic and downlink traffic, thereby improve user's up-downgoing peak rate and the throughput of system.

In the present invention, PDSCH or SPS are discharged into to this PDSCH or SPS and discharge timing relationship between HARQ-ACK referred to as the HARQ of downlink data regularly.HARQ timing for downlink data, in service traffics self adaptation TDD system, according to downstream arrangements difference in fact, UE descending reference configuration need to be notified in base station, UE determines the timing relationship between downlink data and its HARQ according to this reference configuration, this reference configuration can be different with actual disposition, also can be different with the configuration that the synchronous HARQ of uplink data scheduling and upstream data is regularly followed.The present invention supposes that UE knows after a frame boundaries, and system will change descending reference configuration, and hypothesis UE knows and change into any uplink-downlink configuration, and this frame boundaries is called descending reference configuration transitions point.

As shown in Figure 2, alphabetical D and S in figure in subframe represent descending sub frame, and letter U represents sub-frame of uplink.Dotted line shown in 201 is descending reference configuration change point, is also the border of two frames.Before 201 dotted lines, the descending reference of frame is configured to configure 2, and the descending reference of frame is configured to configure 1 afterwards.According to hypothesis of the present invention, UE knows after 201 dotted lines that system will adopt and configures 1.

In service traffics self adaptation TDD system, for the descending sub frame before the configuration change point, the sub-frame of uplink that carries its HARQ-ACK may be from this descending sub frame in different descending reference configurations, therefore need to specify a kind of descending reference configuration, put near the HARQ-ACK of descending sub frame change point according to the timing feedback up-downgoing of this configuration.As shown in Figure 3, alphabetical D and S in figure in subframe represent descending sub frame, and letter U represents sub-frame of uplink.Dotted line shown in 301 is descending reference configuration change point, is also the border of two frames.Before 301 dotted lines, the descending reference of frame is configured to configure 1, and the descending reference of frame is configured to configure 2 afterwards.According to hypothesis of the present invention, UE knows after 301 dotted lines that system will adopt and configures 2.Before the configuration change point, if according to configuration 1 timing relationship, subframe 302,303 and 304 is the subframe 305,305 after the configuration change point and the HARQ-ACK of 306 feeding back downlink data respectively.As can be seen from Figure 3, subframe 306 is descending sub frame, can't feed back the HARQ-ACK of subframe 304, therefore the interior downlink data of subframe 304 can not be followed the timing relationship of configuration 1 to the sequential of its HARQ-ACK, otherwise, because can not find the HARQ-ACK of subframe 304 correspondences, UE will abandon downlink data corresponding in subframe 304.

The present invention is for service traffics self adaptation TDD system, the sub-frame of uplink of the descending sub frame of bearing downlink data and these data of carrying HARQ-ACK, when different descending references configuration, is studied the timing relationship problem of the PUSCH/PUCCH of PDSCH or SPS release and its HARQ-ACK of carrying.

Summary of the invention

The application provide a kind of in service traffics self adaptation TDD system the HARQ feedback method of downlink data.

For achieving the above object, the application adopts following technical scheme:

A kind of HARQ feedback method of downlink data, it comprises:

Information and downlink data that a, UE receiving system generation uplink-downlink configuration change;

B, the described downlink data detect received, and determine the HARQ-ACK of described downlink data according to testing result; The information changed according to described uplink-downlink configuration is determined the configuration transitions point, and is identified for controlling the descending reference configuration of HARQ timing relationship according to the in fact downstream arrangements before and after described configuration transitions point;

C, configure corresponding HARQ timing relationship according to described descending reference transmit the HARQ-ACK of described downlink data on sub-frame of uplink.

Preferably, when carrying out described step c,

For before described configuration transitions point or default descending reference configuration transitions point sub-frame of uplink afterwards, according to the in fact downstream arrangements of current system, corresponding HARQ timing relationship transmits the HARQ-ACK of described downlink data;

For the sub-frame of uplink between described configuration transitions point and described descending reference configuration transitions point, according to the described descending reference of determining, configure the HARQ-ACK that corresponding HARQ timing relationship transmits described downlink data.

Preferably, described descending reference configuration transitions point is between subframe n+3 and subframe n+4; Wherein, described configuration transitions point is between subframe n-1 and subframe n.

Preferably, described descending reference configuration transitions point is between subframe n+8 and subframe n+9; Wherein, described configuration transitions point is between subframe n-1 and subframe n.

Preferably, described descending reference configuration transitions point is between subframe n+4 and subframe n+5; Wherein, described configuration transitions point is between subframe n-1 and subframe n.

Preferably, uplink-downlink configuration combination before and after corresponding configuration transitions point, described descending reference configuration transitions point is between subframe n+3 and subframe n+4 or between subframe n+8 and subframe n+9 or between subframe n+4 and subframe n+5 or between subframe n+2 and subframe n+3.

Preferably, the described descending reference of determining according to the in fact downstream arrangements before and after configuration transitions point is configured to

Wherein, 5x means that uplink-downlink configuration 5 and described descending reference configuration transitions point are between subframe n+2 and subframe n+3, and 2x means that uplink-downlink configuration 5 and described descending reference configuration transitions point are between subframe n+2 and subframe n+3.

Preferably, described descending reference is configured in fact downstream arrangements of the front system of described configuration transitions point.

Preferably, described descending reference is configured in fact downstream arrangements of system after described configuration transitions point.

Preferably, the described interim descending reference of determining according to the in fact downstream arrangements before and after configuration transitions point is configured to

Preferably, in described step b, the method further comprises: according to position or the configuration of described descending reference of described configuration transitions point, determine between the descending active region of described descending reference configuration;

When carrying out described step c, all descending sub frames for interior between described descending active region, configure according to described descending reference the HARQ-ACK that corresponding HARQ timing relationship transmits described downlink data.

Preferably, the described definite descending reference of in fact downstream arrangements according to described configuration transitions point front and back is configured to:

Preferably, between the descending active region of the described descending reference configuration of the described location positioning according to described configuration transitions point, be:

The X subframe of consecutive frame before the configuration transitions point that starting point between described descending active region is this configuration variation, the X-1 subframe of consecutive frame before the configuration transitions point that the terminal between described descending active region is next configuration variation, wherein, X=0,1,2,3,4,5,6,7,8 or 9; Perhaps,

The subframe X of consecutive frame before the configuration transitions point that starting point between described descending active region is this configuration variation, the subframe X-1 of consecutive frame after the configuration transitions point that the terminal between described descending active region is this configuration variation, wherein, X=0,1,2,3,4,5,6,7,8 or 9; And, for the descending sub frame between the descending active region that does not belong to each configuration variation, feed back the HARQ-ACK of described downlink data according to the actual disposition of current system.

Preferably, between the described descending active region according to the definite described descending reference configuration of described descending reference configuration, be:

The subframe X that starting point between described descending active region is former frame in every two consecutive frames, the subframe X-1 that the terminal between described descending active region is a rear frame in described every two consecutive frames, wherein, X=0,1,2,3,4,5,6,7,8 or 9; Perhaps,

According to described descending reference configuration, according to following table, determine the terminal between described descending active region

The descending reference configuration	Terminal between descending active region
		0	9 subframes of frame n, or frame n+1 0,1,2,3,4,5,6,7,8, or 9 subframes
1	9 subframes of frame n, or 1,2,3,4,6,7 or 8 subframes of frame n+1
		2	0,1,2,3 or 8 subframes of frame n+1
3	0 subframe of frame n+1
		4	9 subframes of frame n
5	8 subframes of frame n+1
		6	1,2,3 of frame n+1, or 4 subframes

Table 6

Starting point between described descending active region is the last time of next subframe according to terminal between the determined descending active region of table 6 during configuration variation, and wherein, the border of described frame n and n+1 is the configuration transitions point, or frame n and n+1 are any two consecutive frames.

Preferably, UE between the feeding back downlink active region in before the HARQ-ACK of the 1st descending sub frame bearing downlink data and approach the subframe of described configuration transitions point most, receive the information that described uplink-downlink configuration changes.

Preferably, work as X=2,3 or 4 o'clock, base station 4ms or 5ms before configuration transitions point send the information that described uplink-downlink configuration changes, and UE 4ms or 5ms before configuration transitions point receive the information of described uplink-downlink configuration variation.

Preferably, base station 9ms or 10ms before configuration transitions point send the information that described uplink-downlink configuration changes, and UE 9ms or 10ms before configuration transitions point receive the information of described uplink-downlink configuration variation.

Preferably, between described step b and step c, further comprising: the definite mode configured with descending reference between according to described descending active region, determine between up active region;

Describedly for all descending sub frames between described descending active region, according to described descending reference, configure the HARQ-ACK that corresponding HARQ timing relationship transmits described downlink data, comprise: for all sub-frame of uplink interior between up active region, configure corresponding HARQ timing relationship according to described descending reference, transmit the HARQ-ACK of bearing downlink data on corresponding descending sub frame.

Preferably, when determine described descending reference configuration according to following table

And, when the mode between definite descending active region is " the X subframe of consecutive frame before the configuration transitions point that the starting point between descending active region is this configuration variation; the X-1 subframe of consecutive frame before the configuration transitions point that terminal is next configuration variation; X=2,3 or 4 ", between definite described up active region, be:

When described uplink-downlink configuration changes, not to change to configuration 6 and be not to change to configuration 1 and be not to change to configuration 2 and be not to change to configuration 0 and be not to change to configuration 1 and be not from configuring 6 while changing to configuration 2 from configuring 6 from configuring 6 from configuring 0 from configuring 0 from configuring 0, between described up active region the starting point configuration transitions point that is this configuration variation before 8 subframes of consecutive frame, 7 subframes of the front consecutive frame of the configuration transitions point that terminal is next configuration variation;

When described uplink-downlink configuration changes, be change to configuration 6 or change to configuration 1 or change to configuration 2 or change to configuration 0 or change to configuration 1 or from configuring 6 while changing to configuration 2 from configuring 6 from configuring 6 from configuring 0 from configuring 0 from configuring 0,9 subframes of consecutive frame before the configuration transitions point that starting point between described up active region is this configuration variation, 8 subframes of consecutive frame before the configuration transitions point that terminal is next configuration variation.

8 subframes of consecutive frame before the configuration transitions point that starting point between up active region is this configuration variation, 7 subframes of consecutive frame before the configuration transitions point that terminal is next configuration variation; Or 9 subframes of consecutive frame before the configuration transitions point that is this configuration variation of the starting point between up active region, 8 subframes of the front consecutive frame of the configuration transitions point that terminal is next configuration variation; Or 0 subframe of consecutive frame after the configuration transitions point that is this configuration variation of the starting point between up active region, 9 subframes of the front consecutive frame of the configuration transitions point that terminal is next configuration variation; Or 1 subframe of consecutive frame after the configuration transitions point that is this configuration variation of the starting point between up active region, the configuration transitions point that terminal is next configuration variation is 0 subframe of consecutive frame afterwards; Or 2 subframes of consecutive frame after the configuration transitions point that is this configuration variation of the starting point between up active region, the configuration transitions point that terminal is next configuration variation is 1 subframe of consecutive frame afterwards.

And when the mode between definite descending active region is " the X subframe of consecutive frame before the configuration transitions point that the starting point between descending active region is this configuration variation; the X-1 subframe of consecutive frame before the configuration transitions point that terminal is next configuration variation; X=2,3 or 4 ", 8 subframes of consecutive frame before the configuration transitions point that starting point between the described up active region of determining is this configuration variation, 7 subframes of consecutive frame before the configuration transitions point that terminal is next configuration variation.

And determine that mode between descending active region be mode between " the subframe X of consecutive frame before the configuration transitions point that the starting point between descending active region is this configuration variation; the subframe X-1 of the rear consecutive frame of the configuration transitions point that terminal be this configuration variation; X=2,3 or 4 " or definite descending active region while being " the subframe X that the starting point between descending active region is former frame in every two consecutive frames; the subframe X-1 that terminal is a rear frame in described every two consecutive frames; X=2,3 or 4 ", between definite described up active region is:

When described uplink-downlink configuration changes, not to change to configuration 6 and be not to change to configuration 1 and be not to change to configuration 2 and be not to change to configuration 0 and be not to change to configuration 1 and be not from configuring 6 while changing to configuration 2 from configuring 6 from configuring 6 from configuring 0 from configuring 0 from configuring 0,8 subframes of consecutive frame before the configuration transitions point that starting point between described up active region is this configuration variation, 7 subframes of consecutive frame after the configuration transitions point that terminal is this configuration variation;

When described uplink-downlink configuration changes, be change to configuration 6 or change to configuration 1 or change to configuration 2 or change to configuration 0 or change to configuration 1 or from configuring 6 while changing to configuration 2 from configuring 6 from configuring 6 from configuring 0 from configuring 0 from configuring 0,9 subframes of consecutive frame before the configuration transitions point that starting point between described up active region is this configuration variation, 8 subframes of consecutive frame after the configuration transitions point that terminal is this configuration variation.

9 subframes of consecutive frame before the configuration transitions point that starting point between up active region is this configuration variation, 8 subframes of consecutive frame after the configuration transitions point that terminal is this configuration variation; Or 0 subframe of consecutive frame after the configuration transitions point that is this configuration variation of the starting point between up active region, the configuration transitions point that terminal be this configuration variation is 9 subframes of the 2nd frame afterwards; Or 1 subframe of consecutive frame after the configuration transitions point that is this configuration variation of the starting point between up active region, the configuration transitions point that terminal be this configuration variation is 0 subframe of the 2nd frame afterwards; Or 2 subframes of consecutive frame after the configuration transitions point that is this configuration variation of the starting point between up active region, the configuration transitions point that terminal be this configuration variation is 1 subframe of the 2nd frame afterwards.

And determine that the mode between descending active region is " the subframe X of the front consecutive frame of the configuration transitions point that the starting point between descending active region is this configuration variation, the subframe X-1 of consecutive frame after the configuration transitions point that terminal is this configuration variation, X=2, 3 or 4 " or determine that the mode between descending active region is " the subframe X that the starting point between descending active region is former frame in every two consecutive frames, the subframe X-1 that terminal is a rear frame in described every two consecutive frames, X=2, 3 or 4 " time, 8 subframes of consecutive frame before the configuration transitions point that starting point between the described up active region of determining is this configuration variation, 7 subframes of consecutive frame after the configuration transitions point that terminal is this configuration variation.

Preferably, when the terminal determined according to following table between described descending active region,

And the starting point between descending active region is that last time is during configuration variation during according to next subframe of terminal between the determined descending active region of upper table, terminal value between every kind of descending active region in table on correspondence, according to the following table corresponding terminal of determining between described up active region one by one

The descending reference configuration	Terminal between up active region
		0	2,5,7,7,7,7 or 9 subframes of frame n+1, or 2,2,2,2 subframes of frame n+2
1	3,7,7,7 or 8 subframes of frame n+1, or 2,2,2 subframes of frame n+2
		2	7,7,7,7 subframes of frame n+1, or 2 subframes of frame n+2
3	4 subframes of frame n+1
		4	3 subframes of frame n+1
5	2 subframes of frame n+2
		6	8,8,8 or 8 subframes of frame n+1

Starting point between described up active region is the last time of next subframe according to terminal between the determined up active region of upper table during configuration variation; Wherein, the border of described frame n and n+1 is the configuration transitions point, or frame n and n+1 are any two consecutive frames.

As seen from the above technical solution, in the present invention, in service traffics self adaptation TDD system, when the uplink-downlink configuration dynamic change of system reality, the uplink-downlink configuration that the HARQ-ACK of descending sub frame feedback is regularly followed also can respective change.Information and downlink data that the application UE receiving system generation uplink-downlink configuration changes; The information changed according to uplink-downlink configuration is determined the configuration transitions point, and is identified for controlling the descending reference configuration of HARQ timing relationship according to the in fact downstream arrangements before and after configuration transitions point; Configure the HARQ-ACK of corresponding HARQ timing relationship transmitting downlink data on sub-frame of uplink according to descending reference.According to the application's method, make the HARQ-ACK of more descending sub frame be fed back, thus the effective physical resource that must save descending sub frame.

The accompanying drawing explanation

The frame structure schematic diagram of the TDD system that Fig. 1 is LTE;

The schematic diagram that Fig. 2 is configuration transitions point;

The timing relationship schematic diagram that Fig. 3 is the descending sub frame HARQ-ACK information before the subframe transmission configuration transfer point after configuration transitions point;

The particular flow sheet that Fig. 4 is downlink data HARQ timing method in the present invention;

Fig. 5 be interim with reference to the downstream arrangements transfer point schematic diagram between subframe n+3 and subframe n+4;

The HARQ-ACK that Fig. 6 is two different uplink-downlink configuration downlink datas is at the schematic diagram with up subframe feedback;

Fig. 7 arrives first the schematic diagram fed back after the HARQ-ACK of downlink data.

The schematic diagram that Fig. 8 is the application's method two thinking one;

The notice time that Fig. 9 is configuration variation information is with respect to the Timing Advance explanation schematic diagram of configuration change point.

The schematic diagram that Figure 10 is the application's method two thinking two;

The schematic diagram that Figure 11 is the application's method two thinking three;

The notice time of four times configuration variation information of Figure 12 thinking is with respect to the Timing Advance explanation schematic diagram of configuration change point.

Embodiment

For the purpose, technological means and the advantage that make the application is clearer, below in conjunction with accompanying drawing, the application is described in further details.

In the present invention, system is by message informing UE uplink-downlink configuration, information and other parameter according to this configuration, system obtains PDSCH or SPS discharges the configuration information of obeying with the timing relationship of the PUSCH/PUCCH that carries its HARQ-ACK, as system adopts broadcast signaling, RRC signaling or physical layer signaling notice UE uplink-downlink configuration, thus and other parameter system obtain the configuration information that the asynchronous HARQ of downlink data regularly follows.System is by message informing UE new uplink-downlink configuration, and after UE receives new uplink-downlink configuration, UE knows on the border of a frame, and system will be new configuration from old configuration transitions, and the border of this frame is called as the configuration transitions point.

In the LTE system, R8, R9, R10, the UE of R11 is the supporting business adaptive-flow not, and these UE are called as backward UE, and the UE of supporting business adaptive-flow is called as highest version UE.In service traffics self adaptation TDD system, the new adaptive configuration of service traffics by the signaling highest version UE of high level or physical layer, this configuration is called as actual uplink-downlink configuration.

For service traffics self adaptation TDD system, the present invention is according to variation and the descending sub frame of actual disposition, or sub-frame of uplink position difference, the establishing method of the configuration that proposition downlink data HARQ regularly follows.In the present invention, the downlink data HARQ that can be some descending sub frame regularly follows actual disposition, can also comprise that the configuration that the downlink data HARQ of other descending sub frames regularly follows is different from actual disposition, the configuration that we are different from actual disposition by this is called the descending reference configuration.The PDSCH of descending sub frame or SPS release are followed the corresponding timing of descending reference configuration institute with the timing relationship between the PUSCH/PUCCH that carries its HARQ-ACK.In the present invention, will be called old configuration or old uplink-downlink configuration in abutting connection with configuration transitions point and the configuration before transfer point, will be called new configuration or new uplink-downlink configuration in abutting connection with configuration transitions point and the configuration after transfer point.

Carry out the method flow of downlink data HARQ-ACK feedback in the application as shown in Figure 4, this flow process comprises the following steps:

Information and downlink data that step 401:UE receiving system generation uplink-downlink configuration changes.

On the one hand, as previously mentioned, system is passed through broadcast signaling, the current system uplink-downlink configuration of the notice UE such as physical layer signaling or RRC signaling, when the uplink-downlink configuration variation will occur in system, system can be notified the corresponding information of UE, and this information specifically comprises: uplink-downlink configuration changes, or new uplink-downlink configuration.

On the other hand, UE receives the downlink data that NodeB issues, if system has sent the uplink-downlink configuration change related information, UE also receives this information.

Step 402:UE detects the downlink data received, and determines the HARQ-ACK information of corresponding downlink data according to testing result.UE, according to receiving uplink-downlink configuration information, determines the frame boundaries (being the configuration transitions point) of configuration variation and configures for the descending reference of controlling the HARQ timing relationship.

Wherein, descending reference configuration be sub-frame of uplink when the HARQ-ACK of transmitting downlink data, the uplink-downlink configuration that PDSCHHARQ regularly follows, it is just known that sub-frame of uplink carries the corresponding descending sub frame UE of HARQ-ACK.This step has following two kinds of methods when specific implementation:

Method one

In the method, after configuration transitions point, introduce a time transfer point, be called descending reference configuration transitions point.Particularly, descending reference configuration transitions point referred to before this transfer point in certain limit, the HARQ-ACK that sub-frame of uplink carries downlink data regularly obeys descending reference and configures corresponding timing relationship, after this transfer point in certain limit, sub-frame of uplink carries the HARQ-ACK of downlink data, and regularly not needing to obey descending reference configures corresponding timing relationship.Sub-frame of uplink between configuration transitions point and descending reference configuration transitions point is obeyed the descending reference configuration.

As shown in Figure 5, alphabetical D and S in figure in subframe represent descending sub frame, and letter U represents sub-frame of uplink.Dotted line shown in 501 is the configuration transitions point, is also the border of two frames.Before 501 dotted lines, the uplink-downlink configuration of frame is configuration 2, and the uplink-downlink configuration of frame is configuration 1 afterwards.Hypothesis according to the application, UE knows after 501 dotted lines that system will adopt and configures 1, dotted line shown in 502 is downstream arrangements configuration transitions point, and the HARQ-ACK that carries downlink data of the sub-frame of uplink between the dotted line shown in 501 dotted lines and 502 regularly obeys descending reference and configures corresponding timing relationship.

After configuration transitions point and the HARQ-ACK of the sub-frame of uplink between descending reference configuration transitions point carrying, obey descending reference and configure corresponding timing.Can there be following several selection the position of concrete descending reference configuration transitions point:

(1) implementation method one

It is between subframe n-1 and n that transfer point is put in establishing, and descending reference configuration transitions point is between n+3 and n+4 so.The HARQ-ACK of the sub-frame of uplink carrying after configuration transitions point and between interim descending reference configuration transitions point, obey descending reference in this method given below and configure corresponding timing, in this implementation method, after such sub-frame of uplink just is positioned at subframe n-1 and before n+4.

(2) implementation method two

It is between subframe n-1 and n that transfer point is put in establishing, and descending reference configuration transitions point is between n+8 and n+9 so.The HARQ-ACK of the sub-frame of uplink carrying after configuration transitions point and between interim descending reference configuration transitions point, obey descending reference in this method given below and configure corresponding timing, in this implementation method, after such sub-frame of uplink just is positioned at subframe n-1 and before n+9.

(3) implementation method three

It is between subframe n-1 and n that transfer point is put in establishing, and descending reference configuration transitions point is between n+4 and n+5 so.After configuration transitions point and the HARQ-ACK of the sub-frame of uplink between descending reference configuration transitions point carrying, obey descending reference in this method given below and configure corresponding timing, in this implementation method, after such sub-frame of uplink just is positioned at subframe n-1 and before n+5.

(4) implementation method four

It is between subframe n-1 and n that transfer point is put in establishing, and system is that every kind of new, old uplink-downlink configuration combination specifies descending reference configuration transitions point between n+3 and n+4, or between n+8 and n+9, or between n+4 and n+5.This implementation comprised under different new, old uplink-downlink configuration combinations, descending reference configuration transitions point between n+3 and n+4, or between n+8 and n+9, or between n+4 and n+5, or between n+2 and n+3 all situations, at this, do not enumerate.After configuration transitions point and the HARQ-ACK of the sub-frame of uplink between descending reference configuration transitions point carrying, obey descending reference in this method given below and configure corresponding timing, in this implementation method, after such sub-frame of uplink just is positioned at subframe n-1 and before n+x, wherein x is the left side subframe in abutting connection with descending reference configuration transitions point, according to difference configuration combination, it is worth different.

If sub-frame of uplink is after configuration transitions point, and, before descending reference configuration transitions point, sub-frame of uplink is when the HARQ-ACK of transmitting downlink data, the uplink-downlink configuration that the timing of PDSCH HARQ is obeyed is called the descending reference configuration.For this method one, descending reference configuration definite has following several implementation method.

(1) implementation method one

If sub-frame of uplink is before configuration transitions point, or sub-frame of uplink is after descending reference configuration transitions point, sub-frame of uplink is when the HARQ-ACK of transmitting downlink data, and the uplink-downlink configuration of current system appointment is obeyed in the timing of PDSCH HARQ.

If sub-frame of uplink is after configuration transitions point, and, before descending reference configuration transitions point, sub-frame of uplink is when the HARQ-ACK of transmitting downlink data, the uplink-downlink configuration that the timing of PDSCH HARQ is obeyed is in numeral shown in table 3.

Table 3

In table 3, new table of selecting in every any one numeral to form is all within protection scope of the present invention, and wherein 5x means, PDSCH HARQ timing relationship is obeyed uplink-downlink configuration 5, and interim descending reference configuration transitions point is between n+2 and n+3; 2x means, PDSCH HARQ timing relationship obedience uplink-downlink configuration 2, and descending reference configuration transitions point is between n+2 and n+3.

If a subframe between configuration transitions point and descending reference configuration transitions point is actual is sub-frame of uplink, but, according to the descending reference configuration, this subframe is descending sub frame, and this subframe is not carried HARQ-ACK.

(2) implementation method two

If sub-frame of uplink is before configuration transitions point, or, after descending reference configuration transitions point, sub-frame of uplink is when the HARQ-ACK of transmitting downlink data, current uplink-downlink configuration is obeyed in the timing of PDSCH HARQ.If sub-frame of uplink is after configuration transitions point, and before descending reference configuration transitions point, sub-frame of uplink is when the HARQ-ACK of transmitting downlink data, and the timing of PDSCH HARQ is obeyed is configured to old uplink-downlink configuration.

(3) implementation method three

If sub-frame of uplink is before configuration transitions point, or, after descending reference configuration transitions point, sub-frame of uplink is when the HARQ-ACK of transmitting downlink data, current uplink-downlink configuration is obeyed in the timing of PDSCH HARQ.If sub-frame of uplink is after configuration transitions point, and before descending reference configuration transitions point, sub-frame of uplink is when the HARQ-ACK of transmitting downlink data, and the timing of PDSCH HARQ is obeyed is configured to new uplink-downlink configuration.

(4) implementation method four

If sub-frame of uplink is before configuration transitions point, or, after descending reference configuration transitions point, sub-frame of uplink is when the HARQ-ACK of transmitting downlink data, current uplink-downlink configuration is obeyed in the timing of PDSCH HARQ.

If sub-frame of uplink is after configuration transitions point, and, before descending reference configuration transitions point, sub-frame of uplink is when the HARQ-ACK of transmitting downlink data, being configured to shown in table 4 that the timing of PDSCH HARQ is obeyed is digital.

Table 4

(5) implementation method five

If sub-frame of uplink is after configuration transitions point, and, before descending reference configuration transitions point, sub-frame of uplink is when the HARQ-ACK of transmitting downlink data, being configured to shown in table 5 that the timing of PDSCH HARQ is obeyed is digital.

Table 5

In this implementation method, when the position of descending reference configuration transfer point as aforementioned implementation method for the moment, have more downlink data to be fed.

The above-mentioned the first implementation method that is step 402.Wherein, introduce descending reference configuration transitions point, for the sub-frame of uplink between configuration transitions point and descending reference configuration transitions point, according to descending reference, configure the feedback that corresponding HARQ timing relationship carries out HARQ-ACK information.Below introduce the second implementation method of step 402:

Method two

Before the specific implementation of introduction method two, at first illustrate, the design of downlink data HARQ-ACK feedback need take into account following two principles: 1, same sub-frame of uplink can not have the different binding window under two and above configuration; 2, for the descending sub frame of first receiving, its HARQ-ACK answers priority feedback, that is to say for the descending sub frame first sent, and base station preferentially knows that UE receives correctness.

For first principle, the HARQ-ACK of some descending sub frames that sub-frame of uplink will feed back, the set of these descending sub frames just forms a bundled window; In standard, according to uplink-downlink configuration and sub-frame of uplink position, the descending sub frame that each sub-frame of uplink will feed back is counted M clear and definite definition, and wherein M binds window exactly, and UE determines the number of HARQ-ACK resource according to the M value.When a sub-frame of uplink has binding windows different under various configurations, will cause the fuzzy of M value, increased standard and implementation complexity.

Below lift a counter-example this principle is described, as shown in Figure 6.Alphabetical D and S in figure in subframe represent descending sub frame, and letter U represents sub-frame of uplink.In figure, 601 is the uplink-downlink configuration transfer point, and uplink-downlink configuration becomes configuration 0 from configuring 6, and according to the sequential of configuration 6, the HARQ-ACK of descending sub frame 602 is in sub-frame of uplink 604 place's feedbacks; Latter two radio frames of supposing transfer point is all configuration 0, according to the sequential that configures 0, the HARQ-ACK of descending sub frame 603 is in sub-frame of uplink 604 place's feedbacks, like this, on subframe 604, determined respectively a binding window according to configuration 6 and configuration 0, two descending sub frames of binding in window are all that this situation has been run counter to this principle at same sub-frame of uplink 604 feedback HARQ-ACK.

For second principle, below lift a counter-example this principle is described, as shown in Figure 7.Alphabetical D and S in figure in subframe represent descending sub frame, and letter U represents sub-frame of uplink.In figure, 701 is the uplink-downlink configuration transfer point, uplink-downlink configuration becomes configuration 0 from configuring 5, sequential according to configuration 5, the HARQ-ACK of descending sub frame 702 is in sub-frame of uplink 803 place's feedbacks, sequential according to configuration 0, the HARQ-ACK of descending sub frame 704 is in sub-frame of uplink 805 place's feedbacks, like this, subframe 702 is prior to subframe 704, and the sub-frame of uplink that carries subframe 802HARQ-ACK is later than the sub-frame of uplink that carries subframe 704HARQ-ACK, when design descending sub frame HARQ-ACK, need avoid this situation.

Based on above-mentioned two principles, when design downlink data HARQ-ACK sequential, need to determine following 2 points:

1. descending reference configuration.Configure corresponding downlink data HARQ regularly according to this, the HARQ-ACK of UE feeding back downlink sub-frame data.

2. between the descending active region of descending reference configuration.All descending sub frames in this is interval configure corresponding timing according to descending reference and feed back its HARQ-ACK; Hereinafter by between the descending active region of descending reference configuration referred to as between descending active region.

If also have descending sub frame, the HARQ-ACK of the timing feeding back downlink data that these subframes are corresponding according to its actual disposition outside between descending active region.Provide four kinds of thinkings of determining between descending active region in this method, wherein, according to thinking one, three, four while determining between descending active regions, there is no other subframes between between adjacent two descending active regions, and all subframes all press the HARQ-ACK timing that downlink data is determined in corresponding descending reference configuration; While determining between descending active region according to thinking two, may also have other subframes between between adjacent two descending active regions, in this case, be positioned at descending sub frame between descending active region and determine HARQ regularly according to the descending reference configuration, the descending sub frame in not between descending active region is determined the HARQ-ACK timing of downlink data according to actual disposition.

Definite method between descending active region below is discussed, following four thinkings is arranged:

(1) thinking one

In this thinking, when actual uplink-downlink configuration changes between all 7 kinds of configurations in LTE, or while changing between partial configuration, the terminal between descending active region is determined according to identical parameters.Wherein the part uplink-downlink configuration can refer to by uplink-downlink configuration 0,1, and 2,6 set that form also can refer to the set consisted of configuration 3,4,5.

If the first subframe of every frame is 0 subframe, the subsequent subframe sequence increases progressively successively.Suppose that configuration transitions is o'clock at the n postamble, i.e. n+1 frame head, the X subframe that starting point between descending active region is frame n, suppose that configuration transitions when uplink-downlink configuration next time changes is o'clock at n+m frame and n+m+1 frame boundaries, the X-1 subframe that terminal between the descending active region of this configuration variation is frame m.Here, m is more than or equal to 1 integer, and X is subframe index.

According to uplink-downlink configuration actual before and after configuration transitions point, this thinking can be determined a kind of descending reference configuration according to the mode of follow-up introduction, from certain subframe before configuration transitions point, till arriving next configuration transitions point certain subframe before, descending sub frame in this scope, according to the HARQ of definite descending reference configuration feeding back downlink data, wherein " actual uplink-downlink configuration " illustrates in the preceding article.As shown in Figure 8, alphabetical D and S in figure in subframe represent descending sub frame to example, and letter U represents sub-frame of uplink.In figure, 802 and 804 is the uplink-downlink configuration transfer point, at 802 places, uplink-downlink configuration becomes configuration 1 from configuring 2, at 804 places, uplink-downlink configuration becomes configuration 2 from configuring 1, since the subframe 801 before 802, to 804 subframes 803 before, descending sub frame in this scope feeds back corresponding HARQ-ACK according to the sequential of descending reference configuration A, and descending reference configuration A is that the actual disposition of putting 802 front and back according to configuration transitions is determined.Wherein, descending reference configuration A is determined for one of mode according to follow-up definite descending reference configuration.

Take Fig. 8 as example, if the first subframe of every frame is 0 subframe, X=2 in this example, from 2 subframes of n frame to 1 subframe of m frame till, the HARQ-ACK feedback of all descending sub frames is obeyed the timing configured for descending reference.X=0,1,2,3,4,5,6,7,8,9 all within this patent protection range, X=2,3,4 modes that are recommendation.Work as X=2,3,4 o'clock, can meet aforementioned two principles, carry out better the HARQ-ACK communication.

Here it should be noted that, in order to guarantee that UE is before sending the HARQ-ACK signal of PDSCH, UE can obtain determining PDSCH HARQ-ACK descending reference configuration regularly, base station need to be before the configuration change point the new uplink-downlink configuration of prior notice UE.The Timing Advance of the uplink-downlink configuration that note prior notice UE is new is R, after UE receives configuration variation information, will think that the configuration of system will change after Rms.In order to guarantee the real-time of up-downgoing service traffics adaptive change, should allow the time point that sends configuration variation should approach the configuration change point as far as possible, therefore, if system sends configuration variation information with the 10ms cycle, R is less than 10 and more can meets the demand that the system business flow dynamics changes.

The time point that sends configuration variation information need to meet two conditions: 1) UE is before the HARQ-ACK signal that sends PDSCH, UE can obtain PDSCH HARQ-ACK descending reference configuration regularly, 2) time point that sends configuration variation should approach the configuration transitions point as far as possible.For example,, according to these two conditions, when X=2, it is the example shown in Fig. 8, no matter system sends configuration variation information with 10ms or 40ms cycle, base station can equal the new configuration of 5ms notice UE by R before change point, and the 5 subframe notice UE at the n frame have new configuration.In order to reduce the number of times of blind check, the concrete value for this method X, can stipulate that base station is in the new uplink-downlink configuration of certain subframe notice UE of every frame.For X=2,3,4 situation, can stipulate that base station is at five of every frame, or six subframes notices UE uplink-downlink configuration transfer point will be at 5ms, or after 4ms.In Fig. 9,907 subframes that five subframes are corresponding.

Below illustrate, Fig. 9 has provided the example that configuration variation needs prior notice, and we make X=2 in this example, two subframes that starting point between descending active region is frame n.Alphabetical D and S in figure in subframe represent descending sub frame, and letter U represents sub-frame of uplink.In figure, 901,902 is the uplink-downlink configuration transfer point, and uplink-downlink configuration becomes configuration 1 from configuring 2 respectively, from configuring 1, becomes configuration 0.From subframe 903 to subframe, 904 in this interval, descending sub frame is fed back according to the sequential of configuration 1, wherein configure 1 according to descending reference hereinafter configuration determine that method selects, descending sub frame before 903 is according to configuration 2 sequential feedback, configures equally 2 and determines that according to descending reference configuration hereinafter method selects.Sequential according to configuration 1, the HARQ-ACK of subframe 905 downlink datas is in subframe 906 feedbacks, the sequential of feeding back HARQ-ACK due to subframe 906 is different from previous sub-frame of uplink, and before subframe 906, UE need know according to new uplink-downlink configuration feedback PDSCHHARQ-ACK.Therefore, can make base station at subframe 907 notice UE, uplink-downlink configuration will change 902.

(2) thinking two

Suppose that configuration transitions that uplink-downlink configuration changes is o'clock at the n postamble, the i.e. starting point of n+1 frame head, the X subframe that starting point between descending active region is frame n, the X-1 subframe that terminal is frame n+1, this terminal and the configuration transitions point that uplink-downlink configuration changes next time are irrelevant, the descending reference configuration that in this interval, descending sub frame is followed is determined according to the actual disposition of frame n and frame n+1, if the uplink-downlink configuration change point is at n+m frame and n+m+1 frame boundaries next time, descending sub frame outside between descending active region, the descending sub frame in from the X subframe of frame n+1 to the X-1 subframe of frame n+m, the HARQ-ACK of corresponding timing feeding back downlink data according to its actual disposition.

As shown in figure 10, alphabetical D and S in figure in subframe represent descending sub frame to the example of this thinking, and letter U represents sub-frame of uplink.In figure, 1002 and 1004 is the uplink-downlink configuration transfer point, at 1002 places, uplink-downlink configuration becomes configuration 1 from configuring 2, at 1004 places, uplink-downlink configuration becomes configuration 0 from configuring 1, since subframe 1001 before 1002 to subframe 1003, in this scope, belong between descending active region, this interval descending sub frame feeds back corresponding HARQ-ACK according to the sequential of descending reference configuration A, from subframe 1007, to subframe 1008, in this scope, also belong between descending active region, this interval descending sub frame feeds back corresponding HARQ-ACK according to the sequential of descending reference configuration B, from subframe 1005, to subframe 1006, in this scope, do not belong between descending active region, this interval descending sub frame is according to actual disposition, configure 1 sequential and feed back corresponding HARQ-ACK.

The notice time of configuration variation information is identical with the method for discussing in thinking one with respect to the Timing Advance of configuration change point, repeats no more here.

(3) thinking three

To adjacent two frame n and n+1 arbitrarily, determine the descending reference configuration according to the in fact downstream arrangements of frame n and frame n+1, the X subframe that the starting point between its descending active region is frame n, terminal is the X-1 subframe in frame n+1.Mode between this definite descending reference configuration and descending active region, can think irrelevant with the configuration transitions point of uplink-downlink configuration variation, and always be applied to two continuous frames.

As shown in figure 11, alphabetical D and S in figure in subframe represent descending sub frame to the example of this thinking, and letter U represents sub-frame of uplink.In figure, 1102 is the uplink-downlink configuration transfer point, and at 1102 places, uplink-downlink configuration becomes configuration 1 from configuring 2.Subframe 2 according to the situation of this thinking X=2 from the n frame, be that subframe 1101 starts, subframe 1 to the n+1 frame, it is subframe 1103, descending sub frame feeds back corresponding HARQ-ACK according to the sequential of descending reference configuration A, known according to discussion hereinafter, configuration A determines according to the actual disposition of frame n and frame n+1, from subframe 1105, to subframe 1106, this interval descending sub frame feeds back corresponding HARQ-ACK according to the sequential of descending reference configuration B, known according to discussion hereinafter, and configuration B determines according to the actual disposition of frame n+1 and frame n+2.

Although in this thinking between descending active region when setting and configuration transitions point location-independent, but while changing due to configuration, configuration transitions point all is positioned at frame boundaries, between two consecutive frames, therefore between the descending active region across frame, still can think that the descending reference configuration between this descending active region is to determine according to the actual disposition before and after configuration variation point.

(4) thinking four

Based on above-mentioned two principles, when design downlink data HARQ-ACK sequential, in this thinking, for different descending reference configurations, value corresponding to terminal between the descending active region of its descending reference configuration.Suppose that configuration transitions point that uplink-downlink configuration changes, at n frame end and n+1 frame starting point, configures for different descending references, between its corresponding active region, different terminals is arranged, as shown in table 6.List in table 6 and meet the various available terminal subframe index under above-mentioned two principle prerequisites, every kind of descending reference configured.

The descending reference configuration	Terminal between descending active region
		0	9 subframes of frame n, or frame n+1 0,1,2,3,4,5,6,7,8, or 9 subframes
1	9 subframes of frame n, or 1,2,3,4,6,7 or 8 subframes of frame n+1
		2	0,1,2,3 or 8 subframes of frame n+1
3	0 subframe of frame n+1
		4	9 subframes of frame n
5	8 subframes of frame n+1
		6	1,2,3 or 4 subframes of frame n+1

Table 6

Starting point between descending active region can be the next subframe of the terminal between a upper descending active region.When last uplink-downlink configuration changes, to having between its descending active region, the terminal between the descending active region of determining according to table 6, next subframe of this terminal is the starting point between current descending active region.If last uplink-downlink configuration change point is at p frame and p+1 frame boundaries, for last uplink-downlink configuration change point, terminal between its descending active region is frame p(or p+1) the Y subframe, for the uplink-downlink configuration change point at n frame end, the starting point between its descending active region is frame p(or p+1 so) the Y+1 subframe.

Also has a kind of method of determining between descending active region in this thinking, only consider the actual disposition of adjacent two frames between its descending active region, with frame boundaries be whether that configuration transitions point is irrelevant, according to the actual disposition of adjacent two frame n and n+1 (wherein the border of frame n and n+1 not necessarily configuration transitions point), according to mode hereinafter, determine the descending reference configuration.For different descending reference configurations, the terminal between its descending active region is definite according to table 6, and the starting point between its descending active region can be the next subframe of the terminal between a upper descending active region.For example, according to the actual disposition of n frame and n+1 frame, according to mode given below, determine descending reference configuration X, by X, obtain the terminal t1 between descending active region; According to the actual disposition of n-1 frame and n frame, to determine descending reference according to mode given below and be configured to configure Y, the terminal obtained between descending active region by configuration Y is subframe t2, the next subframe of t2 is the starting point between the corresponding descending active region of reference configuration X.

The notice time of configuration variation information is identical with the method for discussing in thinking one with respect to the Timing Advance of configuration change point.For example, can stipulate that base station is at 0 of frame, or 1 subframe notice UE uplink-downlink configuration will be at 10ms, or change after 9ms.Below illustrate, Figure 12 has provided the example that configuration variation needs prior notice, and alphabetical D and S in figure in subframe represent descending sub frame, and letter U represents sub-frame of uplink.In figure, 1201 is the uplink-downlink configuration transfer point, and the up-downgoing actual disposition becomes configuration 0 from configuring 4.Be configured to configure 4 by frame n and the definite descending reference of frame n+1, further the terminal in definite descending reference interval is 1202, starting point by frame n+1 and the definite descending reference interval of frame n+2 is 1203 so, suppose that 1203 are the descending reference interval of starting point descending reference is configured to configure 0, so at 1204 HARQ-ACK that just need feeding back downlink subframe 1203, therefore descending sub frame 1203 that need to be before 1204, or the actual disposition of 1205 notice UE next frames.

Descending reference below is discussed and is configured definite method, following three methods are arranged:

(1) implementation method one

Suppose that the uplink-downlink configuration transfer point is at n frame end and n+1 frame starting point, UE, according to actual uplink-downlink configuration, determines the descending reference configuration.All descending sub frames between descending active region, the timing under this configuration is all obeyed in the timing of its PDSCH HARQ.Table 7 has provided this descending reference and has configured definite method.

Table 7

(2) implementation method two

Suppose that the uplink-downlink configuration transfer point is at n frame end and n+1 frame starting point, UE, according to actual uplink-downlink configuration, determines the descending reference configuration.All descending sub frames between descending active region, the timing under this configuration is all obeyed in the timing of its PDSCH HARQ.Table 8 has provided this descending reference and has configured definite method.The design philosophy of table 8 is to work as uplink-downlink configuration 0,1, and while changing between 2,6, the TDD uplink-downlink configuration that PDSCH HARQ regularly follows is all uplink-downlink configuration 2.This implementation method is simple.

Table 8

(3) implementation method three

Suppose that the uplink-downlink configuration transfer point is at n frame end and n+1 frame starting point, UE, according to actual uplink-downlink configuration, determines the descending reference configuration.All descending sub frames between descending active region, the timing under this configuration is all obeyed in the timing of its PDSCH HARQ.Table 9 has provided this descending reference and has configured definite method.The design philosophy of table 9 is 0 when uplink-downlink configuration, 1, while changing between 6, the TDD uplink-downlink configuration that PDSCH HARQ regularly follows is uplink-downlink configuration 1, when uplink-downlink configuration 0,1,6, between 2, change, and the time n frame and n+1 frame uplink-downlink configuration have one at least for configuration 2 o'clock, the TDD uplink-downlink configuration that PDSCH HARQ regularly follows is uplink-downlink configuration 2.

Table 9

In above-mentioned implementation method two, when uplink-downlink configuration 0,1,2, while changing between 6, all configurations using uplink-downlink configuration 2 as descending reference, this processing is simple, but owing to only having a sub-frame of uplink in uplink-downlink configuration 2, therefore, even actual uplink-downlink configuration has a plurality of sub-frame of uplink, also can only utilize a sub-frame of uplink to be transmitted according to configuration 2, can cause the load imbalance of PUCCH, one of them subframe load is very heavy.Provide implementation method three for overcoming this problem, both simplified processing mode, also avoided the problem of PUCCH load imbalance simultaneously.

Above-mentioned three kinds of implementations that provide, in the description process, are all supposed the border of configuration transitions point for frame n and n+1, while namely determining the descending reference configuration, according to the actual reference configuration before and after configuration transitions point, carry out.

And in fact, between the descending active region of the second in above-mentioned thinking three and thinking four, determine in mode, division between descending active region not necessarily contrasts the configuration transitions point and carries out, therefore, corresponding to determining method between the descending active region of the second in thinking three and thinking four, in the implementation (i.e. table 7, table 8 and table 9) of above-mentioned three kinds of definite descending reference configurations, frame n and n+1 refer to any two consecutive frames, not necessarily configuration transitions point.But also can notice simultaneously, in the application's method two supposition each the certain frame boundaries of configuration transitions point of configuration variation occurs, therefore, for the descending reference configuration at configuration transitions point place, remain definite according to the actual disposition of configuration transitions point front and back.

Step 403: the definite configuration according to step 402, determine under this configuration PDSCH HARQ regularly, the HARQ-ACK of data on corresponding sub-frame of uplink transmission descending sub frame.

For the method one in step 402, suppose that UE is at the PUCCH/PUSCH of sub-frame of uplink n feedback HARQ-ACK, PDSCH HARQ regularly follows configuration X, and this PUCCH/PUSCH has indicated the HARQ-ACK that the interior PDSCH of descending sub frame n-k or SPS discharge.Here the value of k ∈ K defines in uplink-downlink configuration X in table 2, and K is M element { k ₀, k ₁... k _M-1Set.

For the method two in step 402, be at the HARQ-ACK of corresponding sub-frame of uplink transmitting downlink data, that UE need to know that current sub-frame of uplink carries is the HARQ-ACK of which descending sub frame, i.e. the reference configuration that sub-frame of uplink transmission PDSCH HARQ follows.We define between the up active region of descending reference configuration, between up active region in, during the HARQ-ACK of sub-frame of uplink transmitting downlink data, obey descending reference configuration definite in step 402 method two.

Wherein, according between descending active region and definite mode of descending reference configuration, can release between corresponding up active region.Simultaneously, the selection between up active region also may have multiple.And the configuration variation situation of configuration transitions repeatedly before and after considering, between some up active region, can not adopted, following the application provides between the up active region of recommendation and determines mode, wherein, still suppose the border of configuration transitions point for frame n and frame n+1, next configuration transitions point is the border of frame m and frame m+1:

In step 402 method two thinking one, X=2,3,4 situation, the descending reference definite according to step 402 table 7 configures, and draws the following method of determining up reference interval:

If actual configuration is not to change to configuration 6 from configuring 0, and not to change to configuration 1 from configuring 0, and not to change to configuration 2 from configuring 0, and not to change to configuration 0 from configuring 6, and not to change to configuration 1 from configuring 6, and not to change to configuration 2,8 subframes that the starting point between up active region is frame n, 7 subframes that terminal is frame m from configuring 6.If actual configuration is to change to configuration 6 from configuring 0, or change to configuration 1 from configuring 0, or change to configuration 2 from configuring 0, or change to configuration 0 from configuring 6, or change to configuration 1 from configuring 6, or change to configuration 2,9 subframes that the starting point between up active region is frame n, 8 subframes that terminal is frame m from configuring 6.

In step 402 method two thinking one, the descending reference definite according to step 402 table 8 configures, and draws the following method of determining up reference interval: 8 subframes that the starting point between up active region is frame n, 7 subframes that terminal is frame m; Or be frame n 9 subframes, 8 subframes that terminal is frame m of the starting point between up active region; Or be frame n+1 0 subframe, 9 subframes that terminal is frame m of the starting point between up active region; Or be frame n+1 1 subframe, 0 subframe that terminal is frame m+1 of the starting point between up active region; Or be frame n+1 2 subframes, 1 subframe that terminal is frame m+1 of the starting point between up active region.

In step 402 method two thinking one, X=2,3,4 situation, the descending reference definite according to step 402 table 9 configures, and draws the following method of determining up reference interval: 8 subframes that the starting point between up active region is frame n, 7 subframes that terminal is frame m.

In step 402 method two thinking two, three, X=2,3,4 situation, the descending reference definite according to step 402 table 7 configures, and draws the following method of determining up reference interval:

If actual configuration is not configuration, be to change to configuration 6 from configuring 0, and not to change to configuration 1 from configuring 0, and not to change to configuration 2 from configuring 0, and not to change to configuration 0 from configuring 6, and not to change to configuration 1 from configuring 6, and not to change to configuration 2,8 subframes that the starting point between up active region is frame n, 7 subframes that terminal is frame n+1 from configuring 6.If actual configuration is to change to configuration 6 from configuring 0, or change to configuration 1 from configuring 0, or change to configuration 2 from configuring 0, or change to configuration 0 from configuring 6, or change to configuration 1 from configuring 6, or change to configuration 2,9 subframes that the starting point between up active region is frame n, 8 subframes that terminal is frame n+1 from configuring 6.For thinking two, the subframe except interior between up active region, be not included in the subframe between up active region in addition.Those descending sub frames outside being positioned between descending active region for these, regularly feed back HARQ-ACK according to the actual disposition at descending sub frame place is corresponding, finds thus corresponding sub-frame of uplink to feed back its HARQ-ACK.

In step 402 method two thinking two, three, X=2,3,4 situation, the descending reference definite according to step 402 table 8 configures, and we draw the following method of determining up reference interval: 9 subframes that the starting point between up active region is frame n, 8 subframes that terminal is frame n+1; Or be frame n+1 0 subframe, 9 subframes that terminal is frame n+2 of the starting point between up active region; Or be frame n+1 1 subframe, 0 subframe that terminal is frame n+2 of the starting point between up active region; Or be frame n+1 2 subframes, 1 subframe that terminal is frame n+2 of the starting point between up active region.Subframe except interior between up active region, be not included in the subframe between up active region in addition.Those descending sub frames outside being positioned between descending active region for these, regularly feed back HARQ-ACK according to the actual disposition at descending sub frame place is corresponding, finds thus corresponding sub-frame of uplink to feed back its HARQ-ACK.

In step 402 method two thinking two, three, X=2,3,4 situation, the descending reference definite according to step 402 table 9 configures, and we draw the following method of determining up reference interval: 8 subframes that the starting point between up active region is frame n, 7 subframes that terminal is frame n+1.Subframe except interior between up active region, be not included in the subframe between up active region in addition.Those descending sub frames outside being positioned between descending active region for these, regularly feed back HARQ-ACK according to the actual disposition at descending sub frame place is corresponding, finds thus corresponding sub-frame of uplink to feed back its HARQ-ACK.

In step 402 method two thinking four, draw the method for definite up reference interval terminal as shown in table 10:

Table 10

In table 10, with respect to the configuration of each descending reference, between up active region in each parameter corresponding one by one with lower each parameter of identical descending reference configuration in table 6 respectively.For example, in corresponding table 6, descending reference configuration 0, if 9 subframes that adopt frame n as the terminal between descending active region, so accordingly according to table 10, descending reference is configured to adopt 2 subframes of frame n+1 as the terminal between up active region at 0 o'clock.In addition, corresponding to determining method in aforementioned thinking four between the descending active region of the first, while determining between up active region in above-mentioned table 10, suppose that the configuration transitions point is on the frame boundaries of frame n and n+1; Corresponding to determining method in aforementioned thinking four between the descending active region of the second, while determining between the up active region of above-mentioned table 10, frame n and n+1 mean any two consecutive frames.

Starting point between up active region, by the evaluation of end point between a upper up active region, goes up the next subframe of terminal between a up active region.Between a upper up active region with a upper descending active region between corresponding.

Suppose the PUCCH/PUSCH feedback HARQ-ACK of the sub-frame of uplink p during UE is between up active region, PDSCH HARQ regularly follows the descending reference configuration, and this PUCCH/PUSCH has indicated the HARQ-ACK that the interior PDSCH of descending sub frame p-k or SPS discharge.Here the value of k ∈ K defines in uplink-downlink configuration X in table 2, and K is M element { k ₀, k ₁... k _M-1Set.For the PUCCH/PUSCH feedback HARQ-ACK of the sub-frame of uplink p in not between up active region, PDSCH HARQ regularly follows actual disposition, and this PUCCH/PUSCH has indicated the HARQ-ACK that PDSCH in descending sub frame p-k or SPS discharge.Here the value of k ∈ K defines in uplink-downlink configuration X in table 2, and K is M element { k ₀, k ₁... k _M-1Set.

The above-mentioned specific implementation of the present invention that is.According to the processing in the present invention, can guarantee that the HARQ-ACK of more descending sub frame is fed back, thereby effectively save the physical resource of descending sub frame.

The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, be equal to replacement, improvement etc., within all should being included in the scope of protection of the invention.

Claims

1. the HARQ feedback method of a downlink data, is characterized in that, the method comprises:

The described downlink data that b, detection receive, and the HARQ-ACK of definite described downlink data; The information changed according to described uplink-downlink configuration is determined the configuration transitions point, and is identified for controlling the descending reference configuration of HARQ timing relationship according to the in fact downstream arrangements before and after described configuration transitions point;

2. method according to claim 1, is characterized in that, when carrying out described step c,

3. method according to claim 2, is characterized in that, described descending reference configuration transitions point is between subframe n+3 and subframe n+4; Wherein, described configuration transitions point is between subframe n-1 and subframe n.

4. method according to claim 2, is characterized in that, described descending reference configuration transitions point is between subframe n+8 and subframe n+9; Wherein, described configuration transitions point is between subframe n-1 and subframe n.

5. method according to claim 2, is characterized in that, described descending reference configuration transitions point is between subframe n+4 and subframe n+5; Wherein, described configuration transitions point is between subframe n-1 and subframe n.

6. method according to claim 2, it is characterized in that, uplink-downlink configuration combination before and after corresponding configuration transitions point, described descending reference configuration transitions point is between subframe n+3 and subframe n+4 or between subframe n+8 and subframe n+9 or between subframe n+4 and subframe n+5 or between subframe n+2 and subframe n+3.

7. according to arbitrary described method in claim 2 to 5, it is characterized in that, the described descending reference of determining according to the in fact downstream arrangements before and after configuration transitions point is configured to

8. method according to claim 6, is characterized in that, the described descending reference of determining according to the in fact downstream arrangements before and after configuration transitions point is configured to

9. according to arbitrary described method in claim 2 to 7, it is characterized in that, described descending reference is configured in fact downstream arrangements of the front system of described configuration transitions point.

10. according to arbitrary described method in claim 2 to 7, it is characterized in that, described descending reference is configured in fact downstream arrangements of system after described configuration transitions point.

11. according to arbitrary described method in claim 2 to 7, it is characterized in that, the described interim descending reference of determining according to the in fact downstream arrangements before and after configuration transitions point is configured to

12. according to arbitrary described method in claim 2 to 7, it is characterized in that, the described interim descending reference of determining according to the in fact downstream arrangements before and after configuration transitions point is configured to

13. method according to claim 1, is characterized in that, in described step b, the method further comprises: according to position or the configuration of described descending reference of described configuration transitions point, determine between the descending active region of described descending reference configuration;

14. method according to claim 13, is characterized in that, the described definite descending reference of in fact downstream arrangements according to described configuration transitions point front and back is configured to:

15. method according to claim 13, is characterized in that, the described definite descending reference of in fact downstream arrangements according to described configuration transitions point front and back is configured to:

16. method according to claim 13, is characterized in that, the described definite descending reference of in fact downstream arrangements according to described configuration transitions point front and back is configured to:

17. according to arbitrary described method in claim 13 to 16, it is characterized in that, between the descending active region of the described descending reference configuration of the described location positioning according to described configuration transitions point be:

18. according to arbitrary described method in claim 13 to 16, it is characterized in that, between the described descending active region according to the definite described descending reference configuration of described descending reference configuration be:

Table 6

19. method according to claim 13, is characterized in that, UE between the feeding back downlink active region in before the HARQ-ACK of the 1st descending sub frame bearing downlink data and approach the subframe of described configuration transitions point most, receive the information that described uplink-downlink configuration changes.

20. method according to claim 17, it is characterized in that, work as X=2,3 or 4 o'clock, base station 4ms or 5ms before configuration transitions point send the information that described uplink-downlink configuration changes, and UE 4ms or 5ms before configuration transitions point receive the information of described uplink-downlink configuration variation.

21. method according to claim 18, is characterized in that, base station 9ms or 10ms before configuration transitions point send the information that described uplink-downlink configuration changes, and UE 9ms or 10ms before configuration transitions point receive the information of described uplink-downlink configuration variation.

22. method according to claim 13, is characterized in that, further comprising between described step b and step c: the definite mode configured with descending reference between according to described descending active region, determine between up active region;

23. method according to claim 22, is characterized in that, when determine described descending reference configuration according to following table

24. method according to claim 22, is characterized in that, when determine described descending reference configuration according to following table

25. method according to claim 22, is characterized in that, when determine described descending reference configuration according to following table

26. method according to claim 22, is characterized in that, when determine described descending reference configuration according to following table

27. method according to claim 22, is characterized in that, when determine described descending reference configuration according to following table

28. method according to claim 22, is characterized in that, when determine described descending reference configuration according to following table

29. method according to claim 22, is characterized in that, when the terminal determined according to following table between described descending active region,