CN102075235A - Method and system for switching return link subframe configurations in time division duplex (TDD) system - Google Patents
Method and system for switching return link subframe configurations in time division duplex (TDD) system Download PDFInfo
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- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2643—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA]
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Abstract
The invention discloses a method and system for selectively switching return link subframe configurations in a time division duplex (TDD) system. The method comprises the following steps: a network side selects and determines the target return link subframe configuration according to the influence factors of the target return link subframe configuration and notifies a relay node (RN) of the target return link subframe configuration; and the RN switches the original return link subframe configuration which is being used at present to the target return link subframe configuration according to the target return link subframe configuration selected and determined by the network side. The invention has the following beneficial effects: the method and system are used in the process of switching the return link subframe configurations changed by the network side; and not only the backward compatibility is ensured but also the problem of selecting appropriate target subframe configuration for return link subframe configuration switching is solved while not introducing the signaling overhead.
Description
Technical field
The present invention relates to communication technical field, relate in particular to the method and system that the back haul link sub-frame configuration is switched in a kind of tdd systems.
Background technology
Introducing RN (Relay Node, relay station) in the network, as shown in Figure 1, eNB (evolved base station in the network) and M-UE (Macro User Equipment, the macrocell user) link between is called the link that direct transfers, and the link between eNB and RN is called back haul link, is also referred to as the Un interface, link between RN and R-UE (RelayUser Equipment, relay domain user) is called access link.
As shown in Figure 2, in LTE (Long Term Evolution, the Long Term Evolution) system, 1 10ms radio frames frame is made of the subframe subframe of 10 1ms.TDD (Time Division Duplex, time division duplex) system is provided with 7 kinds of different uplink and downlink sub-frame configuration for satisfying the heterogeneous networks demand, be also referred to as TDD UL/DL Config, as shown in table 1, wherein " D " represents descending sub frame, " U " represents sub-frame of uplink, and " S " represents special subframe.
Table 1 LTE TDD Uplink-downlink configurations.
Concerning back haul link, because #0, #1, #5, #6 subframe need carry broadcast message, synchronizing signal etc. and can not be configured to the back haul link descending sub frame, i.e. Un DL subframe, the subframe that therefore can be used for Un DL comprises #2, #3, #4, #7, #8, #9 subframe.Configuration to back haul link sub-frame of uplink Un UL subframe is then unrestricted.In addition, do not support to be used to comprise the sub-district of RN for TDD UL/DL Config# 0 and #5.
Sub-frame configuration according to LTE TDD system, corresponding UnUL/DL Sub-config is shown in table 2-6 under different TDD UL/DL Config, wherein, DL:UL ratio represents the Un DL/UL subframe ratio that disposes, be configured to Un UL subframe in corresponding subframe position mark " U " expression, mark " D " expression is configured to Un DL subframe.Concrete TDD UL/DLConfig and Un UL/DL Sub-config that network side adopts high-level signaling configuration indication RN to use.
Table 2 Un UL/DL Sub-config for TDD UL/DL Config# 1.
Table 3 Un UL/DL Sub-config for TDD UL/DL Config#2.
Table 4 Un UL/DL Sub-config for TDD UL/DL Config# 3.
Table 5 Un UL/DL Sub-config for TDD UL/DL Config#4
Table 6 Un UL/DL Sub-config for TDD UL/DL Config#6.
For back haul link, network side to RN except that configuration TDD UL/DL Config, also need to dispose Un UL/DL Sub-config, and generally can not change after the TDD UL/DL Config configuration, and UnUL/DL Sub-config may be reshuffled RN by network side according to factors such as network demand, interference, when the Un UL/DL Sub-config that uses as RN need change so, exist for back haul link and select the problem of suitable target-subframe configuration, but at present this problem is not still had corresponding solution.
Summary of the invention
In view of above-mentioned analysis, the present invention aims to provide the method and system that the back haul link sub-frame configuration is switched in a kind of tdd systems, in the time of need changing in order to solve the Un UL/DL Sub-config that uses as RN in the prior art, need select the problem of suitable target-subframe configuration for back haul link.
Purpose of the present invention mainly is achieved through the following technical solutions:
The invention provides the method that a kind of tdd systems back haul link sub-frame configuration is switched, comprising:
Network side is selected to determine target back haul link sub-frame configuration according to the influencing factor of target back haul link sub-frame configuration, and is notified to relay station;
Described relay station is selected definite target back haul link sub-frame configuration according to described network side, switches to described target back haul link sub-frame configuration from the current former back haul link sub-frame configuration of using.
Further, the sub-frame configuration that back haul link used before described former back haul link sub-frame configuration referred to switch, described target back haul link sub-frame configuration refer to switch the sub-frame configuration that the back back haul link uses.
Further, described back haul link sub-frame configuration switching is to carry out between the different back haul link sub-frame configuration of same tdd systems uplink and downlink sub-frame configuration correspondence.
Further, the influencing factor of described target back haul link sub-frame configuration comprises one or more in the following factor at least:
Descending/sub-frame of uplink the ratio of former back haul link sub-frame configuration, descending/sub-frame of uplink ratio the demand of target back haul link sub-frame configuration, sub-frame of uplink number in the former back haul link sub-frame configuration, descending sub frame number in the former back haul link sub-frame configuration, the automatic repeat requests HARQ process of the up mixing number of former back haul link sub-frame configuration, the ascending HARQ course of target back haul link sub-frame configuration is counted demand, the descending HARQ process number of former back haul link sub-frame configuration, the descending HARQ process of target back haul link sub-frame configuration is counted demand.
Further, when target back haul link sub-frame configuration that described network side is determined to switch according to the descending/sub-frame of uplink ratio demand of the descending/sub-frame of uplink ratio of former back haul link sub-frame configuration and/or target back haul link sub-frame configuration, if there is the descending/sub-frame of uplink ratio demand that satisfies target back haul link sub-frame configuration more than a kind of back haul link sub-frame configuration, then described network side is selected wherein a kind of as target back haul link sub-frame configuration arbitrarily.
Further, when target back haul link sub-frame configuration that described network side is determined to switch according to the descending/sub-frame of uplink ratio demand of the descending/sub-frame of uplink ratio of former back haul link sub-frame configuration and/or target back haul link sub-frame configuration, if there is the descending/sub-frame of uplink ratio demand that satisfies target back haul link sub-frame configuration more than a kind of back haul link sub-frame configuration, then described network side is preferential select with former back haul link sub-frame configuration in number identical sub-frame configuration of sub-frame of uplink as target back haul link sub-frame configuration.
Further, when target back haul link sub-frame configuration that described network side is determined to switch according to the descending/sub-frame of uplink ratio demand of the descending/sub-frame of uplink ratio of former back haul link sub-frame configuration and/or target back haul link sub-frame configuration, if there is the descending/sub-frame of uplink ratio demand that satisfies target back haul link sub-frame configuration more than a kind of back haul link sub-frame configuration, then described network side is preferential select with former back haul link sub-frame configuration in number identical sub-frame configuration of part or all of descending sub frame is arranged as target back haul link sub-frame configuration.
Further, when target back haul link sub-frame configuration that network side number is determined to switch according to the sub-frame of uplink of former back haul link sub-frame configuration, preferential select with former back haul link sub-frame configuration in sub-frame of uplink number part or all of identical back haul link sub-frame configuration as target back haul link sub-frame configuration.
Further, when network side select with former back haul link sub-frame configuration in sub-frame of uplink number part or all of identical back haul link sub-frame configuration during as target back haul link sub-frame configuration, preferentially select descending HARQ process number to satisfy the back haul link sub-frame configuration of descending HARQ process number of target back haul link sub-frame configuration as target back haul link sub-frame configuration.
Further, when target back haul link sub-frame configuration that network side number is determined to switch according to the descending sub frame of former back haul link sub-frame configuration, preferential select with former back haul link sub-frame configuration in number identical back haul link sub-frame configuration of part or all of descending sub frame as target back haul link sub-frame configuration.
Further, when network side was determined the target back haul link sub-frame configuration of switching according to the uplink and downlink subframe numbers of former back haul link sub-frame configuration, the preferential selection back haul link sub-frame configuration identical with uplink and downlink subframe in the former back haul link sub-frame configuration was target back haul link sub-frame configuration.
Further, when network side is determined the target back haul link sub-frame configuration of switching according to the descending HARQ process of the target back haul link sub-frame configuration demand of counting, if existence is counted demand more than the descending HARQ process that a kind of back haul link sub-frame configuration satisfies target back haul link sub-frame configuration, described network side is selected wherein a kind of as target back haul link sub-frame configuration arbitrarily.
Further, when network side is determined the target back haul link sub-frame configuration of switching according to the descending HARQ process of the target back haul link sub-frame configuration demand of counting, if exist the descending HARQ process that satisfies target back haul link sub-frame configuration more than a kind of back haul link sub-frame configuration to count demand, then described network side is preferential select with former back haul link sub-frame configuration in number identical sub-frame configuration of sub-frame of uplink as target back haul link sub-frame configuration.
Further, when network side is determined the target back haul link sub-frame configuration of switching according to the descending HARQ process of the target back haul link sub-frame configuration demand of counting, if exist the descending HARQ process that satisfies target back haul link sub-frame configuration more than a kind of back haul link sub-frame configuration to count demand, then described network side is preferential select with former back haul link sub-frame configuration in number identical sub-frame configuration of part or all of descending sub frame is arranged as target back haul link sub-frame configuration.
Further, when network side is determined the target back haul link sub-frame configuration of switching according to the ascending HARQ course of the target back haul link sub-frame configuration demand of counting, if existence is counted demand more than the ascending HARQ course that a kind of back haul link sub-frame configuration satisfies target back haul link sub-frame configuration, then described network side is selected wherein a kind of as target back haul link sub-frame configuration arbitrarily.
Further, when network side is determined the target back haul link sub-frame configuration of switching according to the ascending HARQ course of the target back haul link sub-frame configuration demand of counting, if exist the ascending HARQ course that satisfies target back haul link sub-frame configuration more than a kind of back haul link sub-frame configuration to count demand, then described network side is preferential select with former back haul link sub-frame configuration in sub-frame of uplink number part or all of identical sub-frame configuration as target back haul link sub-frame configuration.
Further, when network side is determined the target back haul link sub-frame configuration of switching according to the ascending HARQ course of the target back haul link sub-frame configuration demand of counting, if exist the ascending HARQ course that satisfies target back haul link sub-frame configuration more than a kind of back haul link sub-frame configuration to count demand, then described network side is preferential select with former back haul link sub-frame configuration in descending sub frame number part or all of identical sub-frame configuration as target back haul link sub-frame configuration.
Further, described network side comprises one or more in the following entity:
Base station eNB, relay station, cell cooperative entity MCE, gateway GW, Mobility Management Entity MME, Evolved UTRAN EUTRAN, operational administrative and safeguard the OAM manager.
The invention provides the system that the back haul link sub-frame configuration is switched in a kind of tdd systems, comprising:
Network side is used for selecting to determine target back haul link sub-frame configuration according to the influencing factor of target back haul link sub-frame configuration, and is notified to relay station;
Relay station is used for selecting definite target back haul link sub-frame configuration according to described network side, switches to described target back haul link sub-frame configuration from the current former back haul link sub-frame configuration of using.
Further, the influencing factor of described target back haul link sub-frame configuration comprises one or more in the following factor at least:
Descending/sub-frame of uplink the ratio of former back haul link sub-frame configuration, descending/sub-frame of uplink ratio the demand of target back haul link sub-frame configuration, sub-frame of uplink number in the former back haul link sub-frame configuration, descending sub frame number in the former back haul link sub-frame configuration, the automatic repeat requests HARQ process of the up mixing number of former back haul link sub-frame configuration, the ascending HARQ course of target back haul link sub-frame configuration is counted demand, the descending HARQ process number of former back haul link sub-frame configuration, the descending HARQ process of target back haul link sub-frame configuration is counted demand.
Further, described network side comprises one or more in the following entity:
Base station eNB, relay station, cell cooperative entity MCE, gateway GW, Mobility Management Entity MME, Evolved UTRAN EUTRAN, operational administrative and safeguard the OAM manager.
Beneficial effect of the present invention is as follows:
The present invention is used for the handoff procedure of network side change back haul link sub-frame configuration, when not introducing signaling consumption, has both guaranteed backwards compatibility, also solves the problem of selecting to switch suitable target-subframe configuration for the back haul link sub-frame configuration.
Other features and advantages of the present invention will be set forth in the following description, and becoming apparent from specification of part perhaps understood by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.
Description of drawings
Fig. 1 is in the prior art, the structural representation of TDD system;
Fig. 2 is in the prior art, the structural representation of radio frames;
Fig. 3 is the schematic flow sheet of the described method of the embodiment of the invention;
Fig. 4 is the structural representation of the described system of the embodiment of the invention.
Embodiment
Specifically describe the preferred embodiments of the present invention below in conjunction with accompanying drawing, wherein, accompanying drawing constitutes the application's part, and is used from explaination principle of the present invention with embodiments of the invention one.For clear and simplification purpose, when it may make theme of the present invention smudgy, with specifying in detail of known function and structure in the omission device described herein.
In following application example, be that example describes as the configuration controlled entity of network side with eNB.
In the TDD system, back haul link uplink and downlink sub-frame configuration is indicated RN by eNB, and the Un UL/DL Sub-config of the use of disposing is shown in table 2-6.Can be divided into different tabulations and layout sequence number by different TDD UL/DL Config for the Un UL/DL Sub-config of TDD system, promptly show shown in the 2-6, also the Un UL/DL Sub-config of all TDD UL/DL Config correspondences can be arranged in a tabulation and compile sequence number, as shown in table 7.Under above-mentioned dual mode, to having different sequence number corresponding relations with a kind of Un UL/DL Sub-config, but do not influence use of the present invention, in the following example, in first kind of mode is that example describes, and promptly different TDD UL/DL Config is divided into different tabulations and corresponding sequence number illustrates.
Table 7 Un UL/DL Sub-config
3 pairs of described methods of the embodiment of the invention are elaborated at first in conjunction with the accompanying drawings.
As shown in Figure 3, Fig. 3 is the schematic flow sheet of the described method of the embodiment of the invention, specifically can comprise the steps:
Step 301:eNB selects to determine target back haul link sub-frame configuration according to the influencing factor of target back haul link sub-frame configuration;
ENB needs the back haul link sub-frame configuration of RN is switched according to judgements such as offered load, interference coordinations, promptly switches to target back haul link sub-frame configuration from current former back haul link sub-frame configuration;
Wherein, the switching of back haul link sub-frame configuration is meant and switches between the different back haul link sub-frame configuration under same TDD sub-frame configuration; The sub-frame configuration that back haul link used before former back haul link sub-frame configuration referred to switch, target back haul link sub-frame configuration refer to switch the sub-frame configuration that the back back haul link uses;
The influencing factor of target back haul link sub-frame configuration can comprise one or more in the following factors:
Descending/sub-frame of uplink the ratio of former back haul link sub-frame configuration, descending/sub-frame of uplink ratio the demand of target back haul link sub-frame configuration, sub-frame of uplink number in the former back haul link sub-frame configuration, descending sub frame number in the former back haul link sub-frame configuration, the ascending HARQ course number of former back haul link sub-frame configuration, the ascending HARQ course of target back haul link sub-frame configuration is counted demand, the descending HARQ process number of former back haul link sub-frame configuration, the descending HARQ process of target back haul link sub-frame configuration is counted demand;
Step 302: network side sends the configuration indication to RN by high-level signaling, and its target back haul link sub-frame configuration of determining is notified to RN;
Step 303:RN switches to this target back haul link sub-frame configuration according to the target back haul link sub-frame configuration that eNB determines from the current former back haul link sub-frame configuration of using.
For the ease of understanding the embodiment of the invention, below will further specify eNB and how to select to determine suitable target back haul link sub-frame configuration according to the influencing factor of target back haul link sub-frame configuration with six concrete examples.
Example one: eNB determines the target back haul link sub-frame configuration of switching according to the descending/sub-frame of uplink ratio demand of target back haul link sub-frame configuration
With TDD UL/DL Config# 1 is example, and the current former back haul link sub-frame configuration of using at back haul link of RN is Un UL/DL Sub-config# 0, and Un DL/UL subframe ratio is 1: 1.ENB needs to switch the back haul link sub-frame configuration according to the offered load demand, and reaching Un DL/UL subframe ratio is 2: 1.Then Un DL/UL subframe ratio is that 2: 1 back haul link sub-frame configuration comprises UnUL/DL Sub-config#2, #3 among the TDDUL/DL Config#1.ENB selects wherein a kind of configuration arbitrarily, as Un UL/DL Sub-config# 3, and the target back haul link sub-frame configuration that indication RN switches as the back haul link sub-frame configuration.
Further, for the descending/sub-frame of uplink ratio that satisfies target back haul link sub-frame configuration equally is 2: 1 two kinds configuration Un UL/DL Sub-config#2, #3, eNB can be #8 according to sub-frame of uplink among the former back haul link sub-frame configuration Un UL/DL Sub-config# 0 further, and Un UL/DL Sub-config#2 and Un UL/DL Sub-config# 0 adopt subframe #8 equally is Un UL subframe, therefore eNB selects UnUL/DL Sub-config#2 as target back haul link sub-frame configuration, help keeping the continuity of Un UL HARQ process, and by high-level signaling configuration indication RN.
With TDD UL/DL Config#2 is example, and the current former back haul link sub-frame configuration of using at back haul link of RN is Un UL/DL Sub-config#5, and Un DL/UL subframe ratio is 3: 1.ENB needs to switch the back haul link sub-frame configuration according to the offered load demand, and reaching Un DL/UL subframe ratio is 2: 1.Then Un DL/UL subframe ratio is that 2: 1 back haul link sub-frame configuration comprises UnUL/DL Sub-config#2, #3 among the TDDUL/DL Config#2.Further, for these two kinds of configurations, eNB can be further number is #3 according to descending sub frame among the former back haul link sub-frame configuration Un UL/DL Sub-config#5, #8, #9, and UnUL/DL Sub-config# 3 and Un UL/DL Sub-config#5 adopt subframe # 3 equally, #9 is a Un DL subframe, therefore eNB selects Un UL/DL Sub-config# 3 as target back haul link sub-frame configuration, making in target back haul link sub-frame configuration and the former back haul link sub-frame configuration has part Un DL subframe identical, and by high-level signaling configuration indication RN.
Example two: eNB is according to sub-frame of uplink number definite target back haul link sub-frame configuration of switching of former back haul link sub-frame configuration.
With TDD UL/DL Config#2 is example, and the current former back haul link sub-frame configuration of using at back haul link of RN is Un UL/DL Sub-config#4, and Un UL subframe is subframe #2, and Un DL subframe is subframe # 3, #4, #8.ENB needs to switch the back haul link sub-frame configuration according to network load condition, reduces Un DL sub-frame number.Then the configuration that Un DL sub-frame number is less than 3 subframes among the TDD UL/DL Config#2 comprises Un UL/DL Sub-config# 0, #1, #2, #3.ENB can number be #2 according to sub-frame of uplink among the former back haul link sub-frame configuration Un UL/DLSub-config#4, and Un UL/DL Sub-config# 0, it is Un UL subframe that #2 and Un UL/DLSub-config#4 adopt subframe #2 equally, therefore selection is a kind of as target back haul link sub-frame configuration arbitrarily in Un UL/DL Sub-config# 0 and #2 for eNB, by high-level signaling configuration indication RN.
Further, network has demand to the descending HARQ process number that switches in the target back haul link sub-frame configuration of back, and requiring DL HARQ process number is 1.And among Un UL/DL Sub-config# 0 and the #2, it is 1 that Un UL/DLSub-config# 0 satisfies DL HARQ process number, and eNB selection Un UL/DL Sub-config# 0 is as target back haul link sub-frame configuration, by high-level signaling configuration indication RN.
Example three: eNB is according to descending sub frame number definite target back haul link sub-frame configuration of switching of former back haul link sub-frame configuration.
With TDD UL/DL Config#2 is example, and the current former back haul link sub-frame configuration of using at back haul link of RN is Un UL/DL Sub-config#5, and Un UL subframe is subframe #7, and Un DL subframe is subframe # 3, #8, #9.ENB needs to switch the back haul link sub-frame configuration according to the network interferences situation, avoids using subframe #7 to be Un UL subframe.Then do not use subframe #7 to comprise Un UL/DL Sub-config# 0, #2, #4 among the TDD UL/DL Config#2 as the configuration of Un UL subframe.ENB can number be #3 according to descending sub frame among the former back haul link sub-frame configuration Un UL/DL Sub-config#5, #8, #9, and Un UL/DL Sub-config#2, #4 has used subframe #4 to be Un DL subframe, different with Un UL/DL Sub-config#5, only Un UL/DLSub-config# 0 employing subframe #8 is a Un DL subframe, and is identical with Un UL/DL Sub-config#5.Therefore eNB selects Un UL/DL Sub-config# 0 as target back haul link sub-frame configuration, by high-level signaling configuration indication RN.
Example four: eNB determines the target back haul link sub-frame configuration of switching according to the uplink and downlink subframe numbers of former back haul link sub-frame configuration
With TDD UL/DL Config#4 is example, and the current former back haul link sub-frame configuration of using at back haul link of RN is Un UL/DL Sub-config#2.ENB is according to offered load and disturbed condition, needs to switch the back haul link sub-frame configuration, makes target back haul link sub-frame configuration comprise all subframes in the former back haul link sub-frame configuration.The back haul link sub-frame configuration Un UL/DL Sub-config# 3 of TDD UL/DL Config#4, #4 satisfies this demand, then eNB selects wherein a kind of configuration arbitrarily, as Un UL/DL Sub-config#4, and the target back haul link sub-frame configuration that indication RN switches as the back haul link sub-frame configuration.
Example five: eNB counts the target back haul link sub-frame configuration that demand is determined switching according to the descending HARQ process of target back haul link sub-frame configuration
With TDD UL/DL Config#2 is example, and the current former back haul link sub-frame configuration of using at back haul link of RN is Un UL/DL Sub-config#3.ENB needs to switch the back haul link sub-frame configuration according to the offered load demand, and reaching the descending HARQ process of Un number is 3.Then satisfy the descending HARQ process of Un number among the TDD UL/DL Config#2 and be 3 back haul link sub-frame configuration and comprise Un UL/DL Sub-config#4, #5.ENB selects wherein a kind of configuration arbitrarily, as Un UL/DL Sub-config#4, and the target back haul link sub-frame configuration that indication RN switches as the back haul link sub-frame configuration.
Further, for satisfying the descending HARQ process of Un number equally is 3 two kinds configuration Un UL/DLSub-config#4, #5, eNB can be further number is #7 according to sub-frame of uplink among the former back haul link sub-frame configuration Un UL/DL Sub-config# 3, and Un UL/DL Sub-config#5 and Un UL/DL Sub-config# 3 adopt subframe #7 equally is Un UL subframe, help keeping the continuity of Un UL HARQ process, therefore eNB selects Un UL/DL Sub-config#5 as target back haul link sub-frame configuration, by high-level signaling configuration indication RN.
Perhaps, further, eNB can number be #3 according to descending sub frame among the former back haul link sub-frame configuration Un UL/DL Sub-config# 3, #9, and Un UL/DL Sub-config#5 adopts subframe # 3, #8, #9 is the UnDL subframe, and is identical with Un UL/DL Sub-config# 3 part.Therefore eNB selects Un UL/DLSub-config#5 as target back haul link sub-frame configuration, by high-level signaling configuration indication RN.
Example six: eNB counts the target back haul link sub-frame configuration that demand is determined switching according to the ascending HARQ course of target back haul link sub-frame configuration
With TDD UL/DL Config# 1 is example, and the current former back haul link sub-frame configuration of using at back haul link of RN is Un UL/DL Sub-config#4.ENB needs to switch the back haul link sub-frame configuration according to the offered load demand, and reaching Un ascending HARQ course number is 1.Then satisfy Un ascending HARQ course number among the TDD UL/DL Config# 1 and be 1 back haul link sub-frame configuration and comprise Un UL/DL Sub-config# 0, #1, #2, #3.ENB selects wherein a kind of configuration arbitrarily, as Un UL/DL Sub-config#2, and the target back haul link sub-frame configuration that indication RN switches as the back haul link sub-frame configuration.
Further, for satisfying Un ascending HARQ course number equally is 1 multiple back haul link sub-frame configuration, eNB can be further number is #3 and #8 according to sub-frame of uplink among the former back haul link sub-frame configuration Un UL/DL Sub-config#4, and the network side demand is switched back use subframe # 3 as Un UL subframe, it is Un UL subframe that Un UL/DLSub-config# 1 and #3 and Un UL/DL Sub-config# 3 adopt subframe # 3 equally, therefore selection is a kind of as target back haul link sub-frame configuration arbitrarily in Un UL/DL Sub-config# 1 and #3 for eNB, by high-level signaling configuration indication RN.
Perhaps, further, for satisfying Un ascending HARQ course number equally is 1 multiple back haul link sub-frame configuration, eNB can be further number is #4 and #9 according to descending sub frame among the former back haul link sub-frame configuration Un UL/DL Sub-config#4, and the network side demand is switched back use subframe #9 as Un DL subframe, Un UL/DL Sub-config# 1, #2, it is Un UL subframe that #3 and Un UL/DL Sub-config# 3 adopt subframe #9 equally, therefore eNB is at Un UL/DL Sub-config# 1, #2, selection is a kind of as target back haul link sub-frame configuration arbitrarily among the #3, by high-level signaling configuration indication RN.
Next 4 pairs of systems of the present invention are elaborated in conjunction with the accompanying drawings.
As shown in Figure 4, Fig. 4 is the structural representation of the described system of the embodiment of the invention, specifically can comprise:
Network side, main being responsible for determined target back haul link sub-frame configuration according to the influencing factor of target back haul link sub-frame configuration, and is notified to relay station;
Wherein, the influencing factor of target back haul link sub-frame configuration comprises one or more in the following option:
Descending/sub-frame of uplink the ratio of former back haul link sub-frame configuration, descending/sub-frame of uplink ratio the demand of target back haul link sub-frame configuration, sub-frame of uplink number in the former back haul link sub-frame configuration, descending sub frame number in the former back haul link sub-frame configuration, the automatic repeat requests HARQ process of the up mixing number of former back haul link sub-frame configuration, the ascending HARQ course of target back haul link sub-frame configuration is counted demand, the descending HARQ process number of former back haul link sub-frame configuration, the descending HARQ process of target back haul link sub-frame configuration is counted demand.
Relay station, the main responsible target back haul link sub-frame configuration of determining according to described network side switches to described target back haul link sub-frame configuration from the current former back haul link sub-frame configuration of using.
Need to prove, owing to select to determine that according to the influencing factor of target back haul link sub-frame configuration suitable target back haul link sub-frame configuration has been described in detail in the said method for how, so locate to repeat no more.
In addition, the above embodiment of the invention only is that example is illustrated with eNB, in fact, network side can comprise eNB, RN, MCE (cell cooperative entity), GW (Gateway, gateway), MME (MobileManagement Entity, Mobility Management Entity), one or more in EUTRAN (Evolved UTRAN), OAM (Operation Administration Maintenance, operational administrative and the maintenance) manager.That is to say, in actual applications, can still, also can finish selection course jointly by the some selection courses of finishing in the above-mentioned entity by above-mentioned several entities according to the difference of actual conditions.
In sum, the embodiment of the invention provides the method and system that the selection of back haul link sub-frame configuration is switched in a kind of tdd systems, the handoff procedure that is used for network side change back haul link sub-frame configuration, when not introducing signaling consumption, both guaranteed backwards compatibility (compatible LTE system), and also solved to the back haul link sub-frame configuration and select to switch the problem that suitable target-subframe disposes.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (21)
1. the method that tdd systems back haul link sub-frame configuration is switched is characterized in that, comprising:
Network side is selected to determine target back haul link sub-frame configuration according to the influencing factor of target back haul link sub-frame configuration, and is notified to relay station;
Described relay station is selected definite target back haul link sub-frame configuration according to described network side, switches to described target back haul link sub-frame configuration from the current former back haul link sub-frame configuration of using.
2. method according to claim 1 is characterized in that, the sub-frame configuration that back haul link used before described former back haul link sub-frame configuration referred to switch, described target back haul link sub-frame configuration refer to switch the sub-frame configuration that the back back haul link uses.
3. method according to claim 1 is characterized in that, it is to carry out between the different back haul link sub-frame configuration of same tdd systems uplink and downlink sub-frame configuration correspondence that described back haul link sub-frame configuration is switched.
4. method according to claim 1 is characterized in that, the influencing factor of described target back haul link sub-frame configuration comprises one or more in the following factor at least:
Descending/sub-frame of uplink the ratio of former back haul link sub-frame configuration, descending/sub-frame of uplink ratio the demand of target back haul link sub-frame configuration, sub-frame of uplink number in the former back haul link sub-frame configuration, descending sub frame number in the former back haul link sub-frame configuration, the automatic repeat requests HARQ process of the up mixing number of former back haul link sub-frame configuration, the ascending HARQ course of target back haul link sub-frame configuration is counted demand, the descending HARQ process number of former back haul link sub-frame configuration, the descending HARQ process of target back haul link sub-frame configuration is counted demand.
5. method according to claim 4, it is characterized in that, when target back haul link sub-frame configuration that described network side is determined to switch according to the descending/sub-frame of uplink ratio demand of the descending/sub-frame of uplink ratio of former back haul link sub-frame configuration and/or target back haul link sub-frame configuration, if there is the descending/sub-frame of uplink ratio demand that satisfies target back haul link sub-frame configuration more than a kind of back haul link sub-frame configuration, then described network side is selected wherein a kind of as target back haul link sub-frame configuration arbitrarily.
6. method according to claim 4, it is characterized in that, when target back haul link sub-frame configuration that described network side is determined to switch according to the descending/sub-frame of uplink ratio demand of the descending/sub-frame of uplink ratio of former back haul link sub-frame configuration and/or target back haul link sub-frame configuration, if there is the descending/sub-frame of uplink ratio demand that satisfies target back haul link sub-frame configuration more than a kind of back haul link sub-frame configuration, then described network side is preferential select with former back haul link sub-frame configuration in number identical sub-frame configuration of sub-frame of uplink as target back haul link sub-frame configuration.
7. method according to claim 4, it is characterized in that, when target back haul link sub-frame configuration that described network side is determined to switch according to the descending/sub-frame of uplink ratio demand of the descending/sub-frame of uplink ratio of former back haul link sub-frame configuration and/or target back haul link sub-frame configuration, if there is the descending/sub-frame of uplink ratio demand that satisfies target back haul link sub-frame configuration more than a kind of back haul link sub-frame configuration, then described network side is preferential select with former back haul link sub-frame configuration in number identical sub-frame configuration of part or all of descending sub frame is arranged as target back haul link sub-frame configuration.
8. method according to claim 4, it is characterized in that, when target back haul link sub-frame configuration that network side number is determined to switch according to the sub-frame of uplink of former back haul link sub-frame configuration, preferential select with former back haul link sub-frame configuration in sub-frame of uplink number part or all of identical back haul link sub-frame configuration as target back haul link sub-frame configuration.
9. method according to claim 8, it is characterized in that, when network side select with former back haul link sub-frame configuration in sub-frame of uplink number part or all of identical back haul link sub-frame configuration during as target back haul link sub-frame configuration, preferentially select descending HARQ process number to satisfy the back haul link sub-frame configuration of descending HARQ process number of target back haul link sub-frame configuration as target back haul link sub-frame configuration.
10. method according to claim 4, it is characterized in that, when target back haul link sub-frame configuration that network side number is determined to switch according to the descending sub frame of former back haul link sub-frame configuration, preferential select with former back haul link sub-frame configuration in number identical back haul link sub-frame configuration of part or all of descending sub frame as target back haul link sub-frame configuration.
11. method according to claim 4, it is characterized in that, when network side was determined the target back haul link sub-frame configuration of switching according to the uplink and downlink subframe numbers of former back haul link sub-frame configuration, the preferential selection back haul link sub-frame configuration identical with uplink and downlink subframe in the former back haul link sub-frame configuration was target back haul link sub-frame configuration.
12. method according to claim 4, it is characterized in that, when network side is determined the target back haul link sub-frame configuration of switching according to the descending HARQ process of the target back haul link sub-frame configuration demand of counting, if existence is counted demand more than the descending HARQ process that a kind of back haul link sub-frame configuration satisfies target back haul link sub-frame configuration, described network side is selected wherein a kind of as target back haul link sub-frame configuration arbitrarily.
13. method according to claim 4, it is characterized in that, when network side is determined the target back haul link sub-frame configuration of switching according to the descending HARQ process of the target back haul link sub-frame configuration demand of counting, if exist the descending HARQ process that satisfies target back haul link sub-frame configuration more than a kind of back haul link sub-frame configuration to count demand, then described network side is preferential select with former back haul link sub-frame configuration in number identical sub-frame configuration of sub-frame of uplink as target back haul link sub-frame configuration.
14. method according to claim 4, it is characterized in that, when network side is determined the target back haul link sub-frame configuration of switching according to the descending HARQ process of the target back haul link sub-frame configuration demand of counting, if exist the descending HARQ process that satisfies target back haul link sub-frame configuration more than a kind of back haul link sub-frame configuration to count demand, then described network side is preferential select with former back haul link sub-frame configuration in number identical sub-frame configuration of part or all of descending sub frame is arranged as target back haul link sub-frame configuration.
15. method according to claim 4, it is characterized in that, when network side is determined the target back haul link sub-frame configuration of switching according to the ascending HARQ course of the target back haul link sub-frame configuration demand of counting, if existence is counted demand more than the ascending HARQ course that a kind of back haul link sub-frame configuration satisfies target back haul link sub-frame configuration, then described network side is selected wherein a kind of as target back haul link sub-frame configuration arbitrarily.
16. method according to claim 4, it is characterized in that, when network side is determined the target back haul link sub-frame configuration of switching according to the ascending HARQ course of the target back haul link sub-frame configuration demand of counting, if exist the ascending HARQ course that satisfies target back haul link sub-frame configuration more than a kind of back haul link sub-frame configuration to count demand, then described network side is preferential select with former back haul link sub-frame configuration in sub-frame of uplink number part or all of identical sub-frame configuration as target back haul link sub-frame configuration.
17. method according to claim 4, it is characterized in that, when network side is determined the target back haul link sub-frame configuration of switching according to the ascending HARQ course of the target back haul link sub-frame configuration demand of counting, if exist the ascending HARQ course that satisfies target back haul link sub-frame configuration more than a kind of back haul link sub-frame configuration to count demand, then described network side is preferential select with former back haul link sub-frame configuration in descending sub frame number part or all of identical sub-frame configuration as target back haul link sub-frame configuration.
18. method according to claim 1 is characterized in that, described network side comprises one or more in the following entity:
Base station eNB, relay station, cell cooperative entity MCE, gateway GW, Mobility Management Entity MME, Evolved UTRAN EUTRAN, operational administrative and safeguard the OAM manager.
19. the system that the back haul link sub-frame configuration is switched in the tdd systems is characterized in that, comprising:
Network side is used for selecting to determine target back haul link sub-frame configuration according to the influencing factor of target back haul link sub-frame configuration, and is notified to relay station;
Relay station is used for selecting definite target back haul link sub-frame configuration according to described network side, switches to described target back haul link sub-frame configuration from the current former back haul link sub-frame configuration of using.
20. system according to claim 19 is characterized in that, the influencing factor of described target back haul link sub-frame configuration comprises one or more in the following factor at least:
Descending/sub-frame of uplink the ratio of former back haul link sub-frame configuration, descending/sub-frame of uplink ratio the demand of target back haul link sub-frame configuration, sub-frame of uplink number in the former back haul link sub-frame configuration, descending sub frame number in the former back haul link sub-frame configuration, the automatic repeat requests HARQ process of the up mixing number of former back haul link sub-frame configuration, the ascending HARQ course of target back haul link sub-frame configuration is counted demand, the descending HARQ process number of former back haul link sub-frame configuration, the descending HARQ process of target back haul link sub-frame configuration is counted demand.
21. system according to claim 19 is characterized in that, described network side comprises one or more in the following entity:
Base station eNB, relay station, cell cooperative entity MCE, gateway GW, Mobility Management Entity MME, Evolved UTRAN EUTRAN, operational administrative and safeguard the OAM manager.
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| CN201010560708.4A CN102075235B (en) | 2010-11-26 | 2010-11-26 | Method and system for switching return link subframe configurations in time division duplex (TDD) system |
| PCT/CN2011/082928 WO2012069006A1 (en) | 2010-11-26 | 2011-11-25 | Method and system for switching between subframe configurations of backhaul link in time division duplex system |
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| CN201010560708.4A CN102075235B (en) | 2010-11-26 | 2010-11-26 | Method and system for switching return link subframe configurations in time division duplex (TDD) system |
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| WO2012069006A1 (en) * | 2010-11-26 | 2012-05-31 | 中兴通讯股份有限公司 | Method and system for switching between subframe configurations of backhaul link in time division duplex system |
| CN102763346A (en) * | 2011-06-22 | 2012-10-31 | 华为技术有限公司 | Method, enode b, relay node and communication system for switching operation mode in relay network |
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| CN102891743A (en) * | 2011-07-21 | 2013-01-23 | 中兴通讯股份有限公司 | HARQ (hybrid automatic repeat request) method and system for return link |
| CN103563425A (en) * | 2011-05-31 | 2014-02-05 | 株式会社Ntt都科摩 | Mobile communication method, relay node, and wireless base station |
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| CN103987073A (en) * | 2014-05-16 | 2014-08-13 | 杭州敦崇科技股份有限公司 | Control method based on wireless protocol extension |
| CN104080179A (en) * | 2013-03-29 | 2014-10-01 | 中国移动通信集团公司 | Service transmission method, device and system in duplex system during long term evolution |
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| WO2012069006A1 (en) * | 2010-11-26 | 2012-05-31 | 中兴通讯股份有限公司 | Method and system for switching between subframe configurations of backhaul link in time division duplex system |
| WO2012162877A1 (en) * | 2011-05-30 | 2012-12-06 | Renesas Mobile Corporation | A method, an apparatus and a network element for dynamical tdd configuration |
| CN103563425B (en) * | 2011-05-31 | 2017-05-10 | 株式会社Ntt都科摩 | Mobile communication method, relay node, and wireless base station |
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| CN102763346A (en) * | 2011-06-22 | 2012-10-31 | 华为技术有限公司 | Method, enode b, relay node and communication system for switching operation mode in relay network |
| CN103650373A (en) * | 2011-06-28 | 2014-03-19 | Lg电子株式会社 | Method and apparatus for communication in TDD system |
| US9787419B2 (en) | 2011-06-28 | 2017-10-10 | Lg Electronics Inc. | Method and apparatus for communication in TDD system |
| CN103650373B (en) * | 2011-06-28 | 2017-08-04 | Lg电子株式会社 | The method and apparatus communicated in tdd systems |
| CN102891743B (en) * | 2011-07-21 | 2017-12-26 | 中兴通讯股份有限公司 | A kind of method and system of back haul link hybrid automatic repeat-request |
| CN102891743A (en) * | 2011-07-21 | 2013-01-23 | 中兴通讯股份有限公司 | HARQ (hybrid automatic repeat request) method and system for return link |
| CN103959876B (en) * | 2011-08-15 | 2017-09-12 | 黑莓有限公司 | UL/DL configurations are notified in LTE TDD systems |
| CN103959876A (en) * | 2011-08-15 | 2014-07-30 | 黑莓有限公司 | Notifying a ul/dl configuration in lte tdd systems |
| CN105191472A (en) * | 2013-01-17 | 2015-12-23 | 瑞典爱立信有限公司 | Methods of radio communications using different subframe configurations and related radio and/or network nodes |
| CN105191472B (en) * | 2013-01-17 | 2019-05-17 | 瑞典爱立信有限公司 | Use the method and relevant radio and/or network node of the radio communication of different sub-frame configurations |
| CN104080179A (en) * | 2013-03-29 | 2014-10-01 | 中国移动通信集团公司 | Service transmission method, device and system in duplex system during long term evolution |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2012069006A1 (en) | 2012-05-31 |
| CN102075235B (en) | 2014-07-16 |
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