CN102468943B - Method for subframe configuration switching in relay link - Google Patents
Method for subframe configuration switching in relay link Download PDFInfo
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- CN102468943B CN102468943B CN201010534276.XA CN201010534276A CN102468943B CN 102468943 B CN102468943 B CN 102468943B CN 201010534276 A CN201010534276 A CN 201010534276A CN 102468943 B CN102468943 B CN 102468943B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1822—Automatic repetition systems, e.g. Van Duuren systems involving configuration of automatic repeat request [ARQ] with parallel processes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1854—Scheduling and prioritising arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
- H04L1/1887—Scheduling and prioritising arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L2001/0092—Error control systems characterised by the topology of the transmission link
- H04L2001/0097—Relays
Abstract
The invention discloses a method for subframe configuration switching in a relay link. The method comprises the following steps that: a network side determines post-switching subframe configuration according to the uplink hybrid automatic repeat request (HARQ) process number of a pre-switching subframe configuration and/or a post-switching subframe configuration. According to the invention, the method is suitable for a relay link between an eNode-B and a relay node (RN); and there is also no need to introduce signal costs; therefore, backward compatibility that means a long term evolution (LTE) system is compatible can be ensured; and a problem that HARQ transmission can not be matched severely during the subframe configuration switching process of the relay link can be solved.
Description
Technical field
The present invention relates to is the Long Term Evolution (LTE of third generation partner program (3GPP), Long TermEvolution) system, senior Long Term Evolution (LTE-A, Long Term Evolution Advanced) the via node transmitting-receiving Anti-Jamming Technique of system, particularly relate to the method that sub-frame configuration in repeated link switches.
Background technology
Via node (RN is introduced in lte-a system, Relay Node) add new link afterwards, as shown in Figure 1, comprise: the link between base station (eNode-B) and via node (RN) is called repeated link or back haul link (backhaul link), RN and subscriber equipment (UE, User Equipment) between link be called access link (access link), the link between eNode-B and UE is called the link that direct transfers (direct link).When the link of eNode-B to RN and the link operation of RN to UE are when identical frequency resource (subcarrier) is upper, be called relaying (inband-relay) in band.
When adopting relaying in band, because the transmitter (to UE transmitting data) of RN can produce self-interference to the receiver of RN (receiving data from eNode-B), therefore the link of eNode-B to RN and the link of RN to UE are in identical frequency resource is simultaneously impossible, unless there are enough Signal separator and isolation between antennas.Similarly, RN also can not to eNode-B transmitting data while receiving data from UE.
RN used at present receives and dispatches the solution of interference problem, is to make RN when receiving the data from eNode-B, does not carry out the operation to UE transmitting data.That is, need to increase space (gap) time after RN to UE link, make UE not carry out any reception or firing operation in this gap time range; And RN completes the switching being transmitted into reception in this gap time range, then receive the data from eNode-B at OFDM (OFDM) symbol below.This gap time is by configuration Multicast Broadcast Single Frequency Network (MBSFN, Multicast Broadcast Single FrequencyNetwork) subframe (subframe) increases as backhaul subframe (backhaul subframe), in LTE system, the concrete mode adopted is: by multimedia control entity (MCE, MBMS ControlEntity) first for eNode-B configures available MBSFN subframe, then in the MBSFN subframe that these are available, configure available backhaul subframe by eNode-B.
According to the regulation in current LTE system, 1 10ms radio frames (frame) is made up of the subframe (subframe) of 10 1ms, each subframe is made up of multiple OFDM symbol again, as shown in Figure 2, can be used for clean culture (Unicast) and multicast and broadcast (Multicast Broadcast).Wherein, when Frequency Division Duplexing (FDD) (FDD, Frequency Division Duplex) mode, #0, #5 subframe is used as to launch synchronizing signal, and #4, #9 subframe is used as paging (paging).When time division duplex (TDD, Time Division Duplex) mode, #0, #5 subframe is used as to launch synchronizing signal, and #1, #6 subframe is used as paging.That is, for under fdd mode, { under #0, #4, #5, #9} subframe and tdd mode, { #0, #1, #5, #6} subframe has above-mentioned special purpose, can not be used for the configuration of MBSFN subframe, namely in 1 radio frames, configurable MBSFN subframe mostly is 6 subframes most.
In LTE system, between subscriber equipment (UE) and base station (eNode-B), the transmission of data is needed to set up hybrid automatic repeat-request (HARQ, Hybrid Automatic Repeat Request) process, and carry out corresponding information feed back.After base station receives the data of subscriber equipment, downlink feedback information (referring to confirmed/non-confirmed ACK/NACK) or uplink authorization information (UL grant is generated according to decoding cases, mainly comprise the information such as new data instruction NDI:New Data Indicator, Modulation and Coding Scheme MCS:Modulation and Coding Scheme, Resourse Distribute RA:Resource Allocation), and the Info Down of generation is sent to subscriber equipment.Subscriber equipment is for further processing according to the information received, if receive ACK or NDI effectively (NDI=1 is effective, or NDI=0 is effective) information, then continues the new data of transmission; If receive NACK or NDI invalid (NDI=0 is invalid, or NDI=1 is invalid) information, then by identical HARQ process, data are resend to base station.
Foregoing explanation, repeated link can not use FDD{#0, #4, #5, #9} descending sub frame, FDD{#4, #8, #9, #3} sub-frame of uplink (note: upper and lower row subframe numbers difference " 4 " herein) can not be used accordingly, that is FDD{#0, #4, #5, #9} descending sub frame and { #4, #8, #9, #3} sub-frame of uplink can not be used for sub-frame configuration.
At present for the design of ascending HARQ, mainly comprise the upper and lower row subframes combine only using 8ms or 8ms integral multiple.Suppose to require to complete sub-frame configuration within the scope of 40ms, and consider that repeated link is avoided using FDD descending sub frame { #0, #4, #5, #9} and sub-frame of uplink { #4, #8, #9, #3}, then descending sub frame 8 set comprise { (#7#23#31), (#6#22#38), (#13#21#37), (#12#28#36), (#3#11#27), (#2#18#26), (#1#17#33), (#8#16#32) }, corresponding sub-frame of uplink 8 set comprise { (#11#27#35), (#10#26#42), (#17#25#41), (#16#32#40), (#7#15#31), (#6#22#30), (#5#21#37), (#12#20#36) }, the subframe being wherein greater than " 40 " can ask modular arithmetic (operator is " mod ") to " 40 ", such as mod (42,40)=2 in computational process.
In fact, because 1 descending sub frame set correspond to 1 sub-frame of uplink set, also just say from lower sub-frame of uplink Set Global, totally 8 lower sub-frame of uplink set, its index of set is as shown in table 1.Because different collective combinations situation together comprises the 8 power kind combinations of 2 altogether, i.e. totally 256 kinds of combinations.
Table 1
| Index of set | Descending sub frame set | Sub-frame of uplink set |
| 0 | (#7#23#31) | (#11#27#35) |
| 1 | (#6#22#38) | (#10#26#42) |
| 2 | (#13#21#37) | (#17#25#41) |
| 3 | (#12#28#36) | (#16#32#40) |
| 4 | (#3#11#27) | (#7#15#31) |
| 5 | (#2#18#26) | (#6#22#30) |
| 6 | (#1#17#33) | (#5#21#37) |
| 7 | (#8#16#32) | (#12#20#36) |
| ...... | ...... | ...... |
| 255 | ...... | ...... |
Sub-frame configuration is undertaken by the bitmap mode of 8 bits, the combination of the sub-frame set representated by index of set namely using the binary number of the 8bits of index of set corresponding different respectively.For example, the binary number of index of set " 7 " is " 00000111 ", correspond to index of set " 2 ", " 1 ", three kinds of subframe collective combinations representated by " 0 " together; ...; The binary system that index of set " 170 " represents is " 10101010 ", correspond to that index of set is " 7 ", " 5 ", " 3 ", four kinds of subframe collective combinations representated by " 1 " together.As long as receiving terminal obtains the index of set be configured and also just obtains descending and sub-frame of uplink configuration accordingly.
HARQ process number (0 ~ 6) corresponding to above-mentioned 256 kinds of lower sub-frame of uplink collective combinations situations is as shown in table 2, " combination configuration " (hereinafter also referred to as sub-frame configuration) wherein in the 1st row uses each the different index of set in decimal number expression table 1, and in the combination configuration of each hurdle, the number of index of set is " number of combinations " in table 2; " set number " represents the number of the sub-frame set representated by combined index number, may be one or two or more kinds; " number of sub frames " represents the number of subframe in each sub-frame set.
Table 2
According to data re-transmission (HARQ) number of times=number of sub frames/HARQ process number in the up link that direct transfers that " number of sub frames " in table 2 and " HARQ process number " can calculate between eNode-B and UE; Thus, the average delay of ascending HARQ course can be known according to ascending HARQ course Cycle Length.For example hypothesis ascending HARQ course Cycle Length is 40ms, and number of sub frames is 6, and HARQ process number is HARQ the number=6/2=3 of 2, then the average delay of ascending HARQ course equals 40/3=13.33ms.
As seen from Table 2, the ascending HARQ course number that the combination that lower sub-frame of uplink set is different is corresponding different.When the sub-frame configuration occurred because RN carries out transmitting/receiving switching switches, ascending HARQ course number may change thus, sub-frame configuration can be caused thus to switch front and back HARQ transmission and do not mate.Therefore, before and after sub-frame configuration switches, there is the serious unmatched situation of HARQ transmission, need to provide a kind of method that in repeated link, sub-frame configuration switches.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of method that in repeated link, sub-frame configuration switches, and sub-frame configuration can be avoided to switch front and back and occur that serious HARQ transmission is not mated.
In order to solve the problems of the technologies described above, the invention provides a kind of method that in repeated link, sub-frame configuration switches, comprising:
Network side, according to the uplink hybrid automatic repeat request process number switching front sub-frame configuration and/or the rear sub-frame configuration of switching, determines the sub-frame configuration after switching.
Further,
If the uplink hybrid automatic repeat request process number of sub-frame configuration is greater than the uplink hybrid automatic repeat request process number switching rear sub-frame configuration before switching, then basis corresponds to the uplink hybrid automatic repeat request process number of the rear sub-frame configuration of switching and belongs to the combination configuration switching front binary system sub-frame configuration subset, determines the sub-frame configuration after switching; Or, be defined as the sub-frame configuration after switching by switching front sub-frame configuration.
Further,
If the uplink hybrid automatic repeat request process number of sub-frame configuration is less than the uplink hybrid automatic repeat request process number switching rear sub-frame configuration before switching, then basis corresponds to the uplink hybrid automatic repeat request process number of the rear sub-frame configuration of switching and comprises the combination configuration switching front binary system sub-frame configuration, determines the sub-frame configuration after switching; Or, be defined as the sub-frame configuration after switching by switching front sub-frame configuration.
Further,
If the uplink hybrid automatic repeat request process number switching front sub-frame configuration equals the uplink hybrid automatic repeat request process number switching rear sub-frame configuration, any one combination configuration then corresponding to this uplink hybrid automatic repeat request process number, determines the sub-frame configuration after switching.
Further, when the uplink hybrid automatic repeat request process of sub-frame configuration does not correctly complete transmission before the handover,
If the process number k of this uplink hybrid automatic repeat request process is greater than the uplink hybrid automatic repeat request process number n after switching, then network side and/or receiving terminal abandon or hang up (k-n) individual uplink hybrid automatic repeat request process, and network side is defined as the sub-frame configuration after switching by being in any one the combination configuration switching rear hybrid automatic repeat request process number corresponding.
Further,
If k is less than or equal to n, then any one corresponding for the uplink hybrid automatic repeat request process number with the rear sub-frame configuration of switching sub-frame configuration is elected as and is switched rear sub-frame configuration by network side.
Further, when the uplink hybrid automatic repeat request process of sub-frame configuration does not correctly complete transmission before the handover, and when before switching, the uplink hybrid automatic repeat request process number m of sub-frame configuration is greater than the uplink hybrid automatic repeat request process number n switching rear sub-frame configuration
If the uplink hybrid automatic repeat request process number k that the front sub-frame configuration of switching does not correctly complete transmission is less than or equal to n, then network side configures according to corresponding to n and belonging to the combination switching front binary system sub-frame configuration subset, determines the sub-frame configuration after switching;
If k is greater than n, then network side and/or receiver side abandon or hang up (k-n) individual uplink hybrid automatic repeat request process, and network side switches sub-frame configuration corresponding to front binary system sub-frame configuration subset according to corresponding to n and belonging to, and determines the sub-frame configuration after switching.
Further, when the uplink hybrid automatic repeat request process of sub-frame configuration does not correctly complete transmission before the handover, and when before switching, the uplink hybrid automatic repeat request process number m of sub-frame configuration is less than or equal to the uplink hybrid automatic repeat request process number n switching rear sub-frame configuration
If when the uplink hybrid automatic repeat request process number k that the front sub-frame configuration of switching does not correctly complete transmission is less than or equal to n, then network side is according to corresponding to n and comprising the sub-frame configuration switching front binary system sub-frame configuration, determines the sub-frame configuration after switching.
Further, before switching, the uplink hybrid automatic repeat request process of sub-frame configuration does not correctly complete transmission, specifically refers to one or more in following situation:
In the uplink hybrid automatic repeat request process of sub-frame configuration before the handover, last re-transmission is not also correctly transmitted;
Downlink acknowledge message corresponding to upstream data is not also received in the uplink hybrid automatic repeat request process of sub-frame configuration before the handover;
After arriving maximum retransmission in the uplink hybrid automatic repeat request process of sub-frame configuration before the handover, last re-transmission is not also correctly transmitted.
Further, after after switching, the uplink hybrid automatic repeat request process number of sub-frame configuration meets switching, the uplink hybrid automatic repeat request process average delay of sub-frame configuration is less than predetermined time delay threshold requirement;
After network side meets the switching of this requirement according to this, the combination corresponding to uplink hybrid automatic repeat request process number of sub-frame configuration configures, and determines the sub-frame configuration after switching.
Further, after switching, the uplink hybrid automatic repeat request process number of sub-frame configuration meets the identical requirement of switching uplink hybrid automatic repeat request process Cycle Length that is front and sub-frame configuration after switching;
After network side meets the switching of this requirement according to this, the combination corresponding to uplink hybrid automatic repeat request process number of sub-frame configuration configures, and determines the sub-frame configuration after switching.
Further,
The sub-frame configuration of network side corresponding to the cyclic shift of sub-frame configuration before switching, determines the sub-frame configuration after switching.
To sum up, adopt the method that the sub-frame configuration of repeated link provided by the invention switches, the repeated link of base station to via node can be applicable to well, and without the need to introducing signaling consumption, both ensure that backwards compatibility (compatible LTE system), and also solved in the sub-frame configuration handoff procedure of the underway link that continues and occur the unmatched problem of serious HARQ transmission.
Accompanying drawing explanation
Fig. 1 is the structural representation increasing link after introducing via node in lte-a system;
Fig. 2 is the structural representation of radio frames;
Fig. 3 be of the present invention switch with sub-frame configuration before and after the ascending HARQ repetition period be 40ms for embodiment and realize the schematic diagram of the method that sub-frame configuration in repeated link switches;
Fig. 4 is the fractionation schematic diagram to 6 processes in ascending HARQ repetition period 40ms in Fig. 3.
Embodiment
Technical scheme of the present invention is explained below in conjunction with accompanying drawing and preferred embodiment.The embodiment below exemplified only for instruction and explanation of the present invention, and does not form the restriction to technical solution of the present invention.When not conflicting, the feature in the embodiment that the present invention exemplifies and embodiment can combination in any mutually.
Be below for the repetition period of HARQ process for 40ms, the method that sub-frame configuration in repeated link of the present invention switches is described.
The embodiment of the method that in repeated link of the present invention, sub-frame configuration switches, comprising:
Network side, according to the ascending HARQ course number switching front sub-frame configuration and/or the rear sub-frame configuration of switching, determines the sub-frame configuration after switching.
Wherein, after switching the ascending HARQ course number of sub-frame configuration meet switch before sub-frame configuration and after switching the ascending HARQ course average delay of sub-frame configuration be less than the requirement of preset time delay thresholding, network side determines the sub-frame configuration after switching according to the ascending HARQ course number of sub-frame configuration after the switching meeting this requirement.
Wherein, after switching the ascending HARQ course number of sub-frame configuration meet switch before and after the identical requirement of the ascending HARQ course Cycle Length of sub-frame configuration, network side determines the sub-frame configuration after switching according to the ascending HARQ course number of sub-frame configuration after the switching meeting this requirement
Wherein, the sub-frame configuration of network side corresponding to the cyclic shift of sub-frame configuration before switching, determines the sub-frame configuration after switching.
Relay link downlink link subframe numbers (DL subframe number) in the present invention and UL subframe frame number calculate by following formula (1), (2) respectively:
DL subframe number＝10*SFN+DL subframe index (1)
UL subframe number＝10*SFN+UL subframe index (2)
In formula,
SFN represents System Frame Number (System Frame Number);
DL subframe index is down link is subframe index, represent the index of 10 subframes (subframe) that 1 radio frames (frame) comprises, its scope is (#0, #1, #2, #3, #4, #5, #6, #7, #8, #9);
UL subframe index is up link is subframe index, and represent the index of 10 subframe that 1 frame comprises, its scope is (#0, #1, #2, #3, #4, #5, #6, #7, #8, #9).
Embodiment 1: network side determines the sub-frame configuration of concrete switching according to the ascending HARQ course number switching front sub-frame configuration and the rear sub-frame configuration of switching, comprises following 6 application examples.
Application example 1
If before switching the ascending HARQ course number of sub-frame configuration be greater than switch after the ascending HARQ course number of sub-frame configuration, then before the ascending HARQ course number and belonging to that will correspond to sub-frame configuration after switching switches, the combination configuration of binary system sub-frame configuration subset is as the sub-frame configuration after switching.
Suppose that before switching, the ascending HARQ course number of sub-frame configuration is 4 (m=4), and be decimal number " 15 (binary number 00001111) " corresponding to subframes combine signaling, represent that the combination of subframe before switching is configured to " 15 "; And sub-frame configuration ascending HARQ course number is 3 (n=3) after switching, that is m is greater than n.
N power (i.e. number of subsets=2 that the number of subsets that before switching, the combination configuration of subframe is corresponding is is the end with " 2 "
n), wherein N is the number of " 1 " in binary system sub-frame configuration signaling.
At this, the number of subsets that before switching, combination configuration " 15 (00001111) " of subframe is corresponding is 4 powers of 2, equals 16, represents and has 16 sub-frame configuration.As shown in Table 2, be 3 according to ascending HARQ course number, correspondingly obtain the combination configuration belonging to " 15 " binary combination configuration subset and have 4, be respectively " 7 (00000111) ", " 11 (00001011) ", " 13 (00001101) ", " 14 (00001110) ", then after switching, sub-frame configuration can be selected in these 4 combination configurations.
Certainly, after switching, sub-frame configuration also can select the sub-frame configuration itself switching sub-frame set formation corresponding to front sub-frame configuration, namely combines configuration " 15 ".
The mode of sub-frame configuration itself or subset before the present invention is switched by above-mentioned employing, the ascending HARQ course before the ascending HARQ course after switching can be made to be matched with switching, thus continue the transmission of the ascending HARQ course before switching.
Application example 2
If before switching the ascending HARQ course number of sub-frame configuration be less than switch after the ascending HARQ course number of sub-frame configuration, then before the ascending HARQ course number and comprising that will correspond to sub-frame configuration after switching switches, the combination configuration of binary system sub-frame configuration is as the sub-frame configuration after switching.
Suppose that before switching, the ascending HARQ course number of sub-frame configuration is 5 (m=5), and the subframes combine signaling of correspondence is decimal number " 230 (binary number 11100110) ", represents that the combination of subframe before switching is configured to " 230 "; And sub-frame configuration ascending HARQ course number is 6 (n=6) after switching, that is m is less than n.
M power (i.e. involved number=2 that the involved number that before switching, the combination configuration of subframe is corresponding is is the end with " 2 "
m), wherein M is the number of " 0 " in binary system sub-frame configuration signaling.
At this, the involved number of combination configuration " 230 (11100110) " correspondence is 3 powers of 2, equals 8, and expression has 8 involved sub-frame configuration.As known from Table 2, be 6 according to ascending HARQ course number, can correspondingly obtain comprise " 230 " binary combination configuration combination configuration have 5 (namely in binary number " 11100110 " except three " 0 " can become, other " 1 " can not become), be respectively " 231 (11100111) ", " 239 (11101111) ", " 247 (11110111) ", " 254 (11111110) ", " 255 (11111111) ", then after switching, sub-frame configuration can be selected in these 5 combination configurations.
Certainly, after switching, sub-frame configuration also can select the sub-frame configuration itself that the sub-frame set of the combination configuration correspondence switching front subframe is formed, namely in combination configuration " 230 ".
The ascending HARQ course number n of sub-frame configuration after if the ascending HARQ course number m of sub-frame configuration before switching equals to switch, then switch sub-frame configuration afterwards and be chosen as that to have HARQ process number be any one sub-frame configuration that n is corresponding.
The present invention switches front sub-frame configuration itself by above-mentioned employing or comprises the sub-frame configuration mode switching front sub-frame configuration, ascending HARQ course before the ascending HARQ course after switching can be made to be matched with switching, thus continue the transmission of the ascending HARQ course before switching.
Application example 3
When the ascending HARQ course of sub-frame configuration does not correctly complete transmission before the handover, if the process number k of this ascending HARQ course is greater than the ascending HARQ course number n after switching, then network side and/or receiving terminal abandon or hang up (k-n) individual ascending HARQ course, and network side is defined as the sub-frame configuration after switching by being in any one the combination configuration switching rear HARQ process number corresponding; If k is less than or equal to n, then any one corresponding for the ascending HARQ course number n with the rear sub-frame configuration of switching sub-frame configuration is elected as and is switched rear sub-frame configuration by network side.
Or, when the ascending HARQ course of sub-frame configuration does not correctly complete transmission before the handover:
When before switching, the ascending HARQ course number m of sub-frame configuration is greater than the ascending HARQ course number n switching rear sub-frame configuration, if the ascending HARQ course number k that the front sub-frame configuration of switching does not correctly complete transmission is less than or equal to n, then network side is according to corresponding to n and belonging to the combination configuration switching front binary system sub-frame configuration subset, determines the sub-frame configuration after switching; If k is greater than n, then network side and/or receiver side abandon or hang up (k-n) individual ascending HARQ course, and network side switches sub-frame configuration corresponding to front binary system sub-frame configuration subset according to corresponding to n and belonging to, and determines the sub-frame configuration after switching.
When before switching, the ascending HARQ course number m of sub-frame configuration is less than or equal to the ascending HARQ course number n switching rear sub-frame configuration, if when the ascending HARQ course number k that the front sub-frame configuration of switching does not correctly complete transmission is less than or equal to n, then network side is according to corresponding to n and comprising the sub-frame configuration switching front binary system sub-frame configuration, determines the sub-frame configuration after switching.
At this, before switching, the ascending HARQ course of sub-frame configuration not yet correctly completes transmission, specifically refer to: in the ascending HARQ course of sub-frame configuration before the handover, last re-transmission is not also correctly transmitted, or also do not receive downlink acknowledge message corresponding to upstream data in the ascending HARQ course of sub-frame configuration before the handover, or after arriving maximum retransmission in the ascending HARQ course of sub-frame configuration before the handover, last re-transmission is not also correctly transmitted.
Before supposing switching, sub-frame configuration does not correctly complete the process number of the ascending HARQ course of transmission is 5 (k=5), and after switching, the ascending HARQ course number of sub-frame configuration is 3 (n=3), and that is k is greater than n;
Then network side and/or receiving terminal abandon or hang up 2 (5-3=2) individual ascending HARQ course, and network side elects any one sub-frame configuration with ascending HARQ course number 3 correspondence switching rear sub-frame configuration as switching rear sub-frame configuration.
When the ascending HARQ course of sub-frame configuration does not correctly complete transmission before the handover, by adopting aforesaid way, the ascending HARQ course before the ascending HARQ course after switching can be made to be matched with switching, thus continue the transmission of the ascending HARQ course before switching.
Application example 4
The combination configuration of network side corresponding to the ascending HARQ course number of sub-frame configuration after the switching of the ascending HARQ course average delay requirement of sub-frame configuration after satisfied switching, determines the sub-frame configuration after switching.
Suppose that after switching, the ascending HARQ course number of sub-frame configuration is 3, and the average delay of ascending HARQ course requires to be less than time delay thresholding (13.33ms), as shown in Table 2, what meet this condition in 256 sub-frame configuration has 48, wherein ascending HARQ course number be 3 sub-frame configuration have 2, be respectively " 85 " and " 170 ", then after switching, sub-frame configuration is selected in these 2 sub-frame configuration.
Realizing sub-frame configuration in repeated link by adopting the above-mentioned delay requirement meeting ascending HARQ course to switch, being in fact still a kind of switching mode meeting HARQ process number demand.
Application example 5
Network side according to meet switch before and after after the identical switching of the ascending HARQ course Cycle Length of sub-frame configuration sub-frame configuration ascending HARQ course number corresponding to sub-frame configuration, determine the sub-frame configuration after switching.
Suppose that after switching, the ascending HARQ course number of sub-frame configuration is 6, and before switching, sub-frame configuration ascending HARQ course Cycle Length is 40ms, (" Un-" represents repeated link, and " Uu-" represents access link as shown in Figure 3; "-DL " represents the down link of respective link, and "-UL " represents the up link of respective link; Subframe with "×" is the aforementioned not configurable subframe with special purpose); Have 6 processes in 1st 40ms, and be the most mostly retransmitted 3 times within the 40ms time; 2nd 40ms is the periodicity repetition of the 1st 40ms, therefore does not draw in Fig. 3 again.Clear in order to express, the sub-frame configuration of interior for the ascending HARQ course cycle (40ms) of sub-frame configuration before the switching in Fig. 36 HARQ processes (1. ~ 6.) is decomposed in 6 parts up and down of Fig. 4.
After switching, the ascending HARQ course repetition period length of sub-frame configuration is also 40ms, or the system repetition period length of specifying also for 40ms time, the sub-frame configuration that (table 2 shown in) meets this condition in 256 sub-frame configuration has 212, wherein ascending HARQ course number be 6 have 9 sub-frame configuration, be respectively " 63 ", " 126 ", " 159 ", " 207 ", " 231 ", " 243 ", " 249 ", " 252 ", " 255 ", then after switching, sub-frame configuration is selected in these 9 sub-frame configuration.
Meet above-mentioned condition sub-frame configuration to refer to: the ascending HARQ course repetition period of sub-frame configuration corresponding sub-frame configuration identical with the ascending HARQ course repetition period switching front sub-frame configuration after switching; Or the sub-frame configuration corresponding to the repetition period of specifying after the switching identical with the ascending HARQ course repetition period switching front sub-frame configuration.
Above-mentionedly meet ascending HARQ course repetition period length requirement by adopting and to realize in repeated link sub-frame configuration and switch, be in fact still a kind of switching mode meeting HARQ process number demand.
Application example 6
The sub-frame configuration of network side corresponding to the cyclic shift of sub-frame configuration before switching, determines the sub-frame configuration after switching.
Suppose that before switching, the ascending HARQ course number of sub-frame configuration is 2, and the subframes combine signaling of correspondence is the decimal system " 5 " (i.e. binary system " 00000101 "), then corresponding binary system to the left or to the right after cyclic shift corresponding sub-frame configuration have 7 sub-frame configuration, corresponding sub-frame configuration is respectively " 10 ", " 20 ", " 40 ", " 80 ", " 160 ", " 65 ", " 130 ", after then switching, sub-frame configuration is selected in these 7 sub-frame configuration, the sub-frame configuration itself switching sub-frame set formation corresponding to front sub-frame configuration can certainly be selected, i.e. sub-frame configuration " 5 ".
Adopt the mode of the cyclic shift of sub-frame configuration before above-mentioned switching, mainly in order to meet the displacement demand of sub-frame configuration in some cases.
Certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection range that all should belong to the claim appended by the present invention.
Claims (12)
1. the method that in repeated link, sub-frame configuration switches, comprising:
Network side, according to the uplink hybrid automatic repeat request process number switching front sub-frame configuration and/or the rear sub-frame configuration of switching, determines the sub-frame configuration after switching.
2. in accordance with the method for claim 1, it is characterized in that,
If the uplink hybrid automatic repeat request process number of sub-frame configuration is greater than the uplink hybrid automatic repeat request process number switching rear sub-frame configuration before switching, then basis corresponds to the uplink hybrid automatic repeat request process number of the rear sub-frame configuration of switching and belongs to the combination configuration switching front binary system sub-frame configuration subset, determines the sub-frame configuration after switching; Or, sub-frame configuration before described switching is defined as the sub-frame configuration after switching.
3. in accordance with the method for claim 1, it is characterized in that,
If the uplink hybrid automatic repeat request process number of sub-frame configuration is less than the uplink hybrid automatic repeat request process number switching rear sub-frame configuration before switching, then basis corresponds to the uplink hybrid automatic repeat request process number of the rear sub-frame configuration of switching and comprises the combination configuration switching front binary system sub-frame configuration, determines the sub-frame configuration after switching; Or, sub-frame configuration before described switching is defined as the sub-frame configuration after switching.
4. in accordance with the method for claim 1, it is characterized in that,
If the uplink hybrid automatic repeat request process number switching front sub-frame configuration equals the uplink hybrid automatic repeat request process number switching rear sub-frame configuration, any one combination configuration then corresponding to described uplink hybrid automatic repeat request process number, determines the sub-frame configuration after switching.
5. in accordance with the method for claim 1, it is characterized in that, when the uplink hybrid automatic repeat request process of sub-frame configuration does not correctly complete transmission before the handover,
If the uplink hybrid automatic repeat request process number k that the front sub-frame configuration of switching does not correctly complete transmission is greater than the uplink hybrid automatic repeat request process number n after switching, then described network side and/or receiving terminal abandon or hang up (k-n) individual uplink hybrid automatic repeat request process, and described network side is defined as the sub-frame configuration after switching by being in any one the combination configuration switching rear hybrid automatic repeat request process number corresponding.
6. in accordance with the method for claim 5, it is characterized in that,
If described k is less than or equal to described n, then any one corresponding for the uplink hybrid automatic repeat request process number with the rear sub-frame configuration of switching sub-frame configuration is elected as and is switched rear sub-frame configuration by described network side.
7. in accordance with the method for claim 1, it is characterized in that, when the uplink hybrid automatic repeat request process of sub-frame configuration does not correctly complete transmission before the handover, and when before switching, the uplink hybrid automatic repeat request process number m of sub-frame configuration is greater than the uplink hybrid automatic repeat request process number n switching rear sub-frame configuration
If the uplink hybrid automatic repeat request process number k that the front sub-frame configuration of switching does not correctly complete transmission is less than or equal to n, then described network side is according to corresponding to described n and belonging to the combination configuration switching front binary system sub-frame configuration subset, determines the sub-frame configuration after switching;
If described k is greater than n, then network side and/or receiver side abandon or hang up (k-n) individual uplink hybrid automatic repeat request process, and network side switches sub-frame configuration corresponding to front binary system sub-frame configuration subset according to corresponding to described n and belonging to, and determines the sub-frame configuration after switching.
8. in accordance with the method for claim 1, it is characterized in that, when the uplink hybrid automatic repeat request process of sub-frame configuration does not correctly complete transmission before the handover, and when before switching, the uplink hybrid automatic repeat request process number m of sub-frame configuration is less than or equal to the uplink hybrid automatic repeat request process number n switching rear sub-frame configuration
If when the uplink hybrid automatic repeat request process number k that the front sub-frame configuration of switching does not correctly complete transmission is less than or equal to n, then described network side is according to corresponding to described n and comprising the sub-frame configuration switching front binary system sub-frame configuration, determines the sub-frame configuration after switching.
9. according to the method described in any one of claim 5 to 8, it is characterized in that, before described switching, the uplink hybrid automatic repeat request process of sub-frame configuration does not correctly complete transmission, specifically refers to one or more in following situation:
Before described switching sub-frame configuration uplink hybrid automatic repeat request process in last re-transmission also correctly do not transmit;
Before described switching sub-frame configuration uplink hybrid automatic repeat request process in also do not receive downlink acknowledge message corresponding to upstream data;
Before described switching sub-frame configuration uplink hybrid automatic repeat request process in arrive maximum retransmission after, last re-transmission is not also correctly transmitted.
10. in accordance with the method for claim 1, it is characterized in that, after after described switching, the uplink hybrid automatic repeat request process number of sub-frame configuration meets switching, the uplink hybrid automatic repeat request process average delay of sub-frame configuration is less than predetermined time delay threshold requirement;
After described network side meets the switching of described requirement according to this, the combination corresponding to uplink hybrid automatic repeat request process number of sub-frame configuration configures, and determines the sub-frame configuration after switching.
11. in accordance with the method for claim 1, it is characterized in that, after described switching, the uplink hybrid automatic repeat request process number of sub-frame configuration meets the identical requirement of switching uplink hybrid automatic repeat request process Cycle Length that is front and sub-frame configuration after switching;
After described network side meets the switching of described requirement according to this, the combination corresponding to uplink hybrid automatic repeat request process number of sub-frame configuration configures, and determines the sub-frame configuration after switching.
12. in accordance with the method for claim 1, it is characterized in that,
The sub-frame configuration of described network side corresponding to the cyclic shift of sub-frame configuration before described switching, determines the sub-frame configuration after described switching.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010534276.XA CN102468943B (en) | 2010-11-05 | 2010-11-05 | Method for subframe configuration switching in relay link |
| PCT/CN2011/081562 WO2012059031A1 (en) | 2010-11-05 | 2011-10-31 | Switching method for subframe configurations in relay link |
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| CN201010534276.XA CN102468943B (en) | 2010-11-05 | 2010-11-05 | Method for subframe configuration switching in relay link |
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| CN101841816B (en) * | 2009-03-16 | 2012-11-07 | 上海贝尔股份有限公司 | Synchronous HARQ-based method and device for preventing signal interference in wireless relay network |
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| WO2012059031A1 (en) | 2012-05-10 |
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