CN102215534B - Sub-frame configuration coordination approach and device thereof between a kind of TDD cell - Google Patents
Sub-frame configuration coordination approach and device thereof between a kind of TDD cell Download PDFInfo
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Abstract
The invention discloses sub-frame configuration coordination approach and device thereof between a kind of TDD cell.The method comprises: sub-frame configuration alteration of judgment is carried out to this base station cell in TDD base station cell, source, and when judgement carries out sub-frame configuration change for needs to this base station cell, sends sub-frame configuration change request to adjacent target TDD base station cell; TDD base station cell, described source receives the described sub-frame configuration that whether accepts of replying described target TDD base station cell and changes the feedback information of asking, and according to described feedback information, this base station cell is carried out to the relative set of sub-frame configuration.Adopt the present invention can improve sub-frame configuration flexibility.
Description
Technical field
The present invention relates to wireless communication technology field, particularly relate to sub-frame configuration coordination approach and device thereof between a kind of TDD cell.
Background technology
As the TDD(TimeDivisionDuplexing of one of two large basic duplex systems, time division duplex) pattern, at wide-band mobile communication under the ever-increasing background of bandwidth demand, receive increasing concern.
For the basic duplex mode that cellular system adopts, tdd mode refers to that uplink downlink uses same working band, and the different time intervals carries out the transmission of uplink and downlink signals, has protection interval (GuardPeriod) between up-downgoing; FDD(FrequencyDivisionDuplexing; Frequency Division Duplexing (FDD)) pattern then refers to that uplink downlink uses different working bands; the transmission different frequency carriers carrying out uplink and downlink signals can be engraved in when same, between up-downgoing, have protection bandwidth (GuardBand).Common TDD system comprises the TD-SCDMA(TimeDivision-SynchronousCodeDivisionMultipleAcc ess of 3G, TD SDMA) TD-LTE(of system and 4G and Long Term Evolution TD-SCDMA) system.
The frame structure of LTE TDD system (Long Term Evolution TDD system) is slightly more complex, and as shown in Figure 1, a radio frames length is 10ms, and comprise special subframe and conventional subframe two class totally 10 subframes, each subframe is 1ms.Special subframe is divided into 3 time slots: DwPTS, GP and UpPTS, wherein, DwPTS for transmitting PSS/PDCCH/PHICH/PCFICH/PDSCH etc., GP be used for descending and up between protection interval, UpPTS be used for transmitting SRS/PRACH.Conventional subframe comprises sub-frame of uplink and descending sub frame, for transmitting uplink/downlink control signal and business datum etc.Wherein, in a radio frame, two special subframes (being positioned at subframe #1 and #6) can be configured, also can configure a special subframe (being positioned at subframe #1).DwPTS time slot in subframe #0 and subframe #5 and special subframe is always used as downlink transfer, and the UpPTS time slot in subframe #2 and special subframe is always for uplink, and other subframes can be configured to as uplink or downlink transfer according to needs.
In TD-LTE system, in special subframe, the summation of DwPTS/GP/UpPTS tri-time slots is 1ms, and three slot lengths divide supports different configuring conditions, and as shown in table 1, Biao Zhong time span unit is Ts, 1
second.
The configuration format of table 1, TD-LTE special subframe
In TD-LTE, ascending-descending subframes distributes support 7 kinds different mode, and concrete configuration parameter is as shown in table 2 below, and D represents as downlink transfer, and U represents as uplink, and S represents that this subframe is special subframe, comprises DwPTS, GP and UpPTS tri-part.
Table 2, LTETDD ascending-descending subframes configuration format
The division of uplink and downlink time slot is static or semi-static, common way divides according to cell type and business proportion determination uplink and downlink timeslot ratio roughly and remain unchanged in network planning process, above-mentioned special subframe configuration and the ascending-descending subframes method of salary distribution are broadcast to all users in community by system information (SystemInformation, SI).This is comparatively simple way under the background of the large covering of macrocell, and also comparatively effective.And along with technical development, increasing Microcell (Picocell), the low power base station such as Home eNodeB (HomeNodeB) are deployed the little covering for providing local, in this kind of community, number of users is less, and customer service changes in demand is comparatively large, therefore there is situation about dynamically changing in the up-downgoing business proportion demand of community.
Support the online uplink and downlink timeslot ratio changing community in current TD-LTE standard, the mode as changed (SystemInformationChange) by system information changes as above two frame configuration parameters.But this change needs by paging and the process such as read system information again, and there are the some fuzzy problems before changing, if such as frame configuration change is frequent, cause systematic function degradation, also can to HARQ(HybridAutomaticRepeatRequest, hybrid automatic repeat-request) operation and scheduling etc. cause adverse effect.Further, the minimum frame configuration change cycle supported in TD-LTE standard is 640ms, and underaction, the dynamic change needs of business can't be adapted to completely.
Summary of the invention
The embodiment provides sub-frame configuration coordination approach and device thereof between a kind of TDD cell, in order to improve sub-frame configuration flexibility.
Sub-frame configuration coordination approach between the TDD cell that the embodiment of the present invention provides, comprising:
Sub-frame configuration alteration of judgment is carried out to this base station cell in TDD base station cell, source, and when judgement carries out sub-frame configuration change for needs to this base station cell, sends sub-frame configuration change request to adjacent target TDD base station cell;
TDD base station cell, described source receives the described sub-frame configuration that whether accepts of replying described target TDD base station cell and changes the feedback information of asking, and according to described feedback information, this base station cell is carried out to the relative set of sub-frame configuration.
The base station that the embodiment of the present invention provides, is applied to TDD system, comprises:
First judging module, for when this base station is as source base station, sub-frame configuration alteration of judgment is carried out to this base station cell, and when judgement carries out sub-frame configuration change for needs to this base station cell, sends sub-frame configuration to adjacent target BS and change request;
Second judging module, for when this base station is as target BS, judges whether that the sub-frame configuration accepting source base station changes request;
Feedback module, for when this base station is as target BS, returns whether accept the feedback information that described sub-frame configuration changes request to source base station;
Configuration module, for when this base station is as source base station, whether what return according to target BS accepts the feedback information that sub-frame configuration changes request, this base station cell is carried out to the relative set of sub-frame configuration.
In the above embodiment of the present invention, TDD base station cell, source sends subframe when needing to carry out sub-frame configuration change to adjacent target TDD base station cell and changes configuring request, change configuring request to make target TDD base station cell and adjudicate to whether accepting this subframe and return the feedback information whether accepting this request, TDD base station cell, source is arranged according to the sub-frame configuration of this feedback information to this base station cell, thus improves sub-frame configuration flexibility.
Accompanying drawing explanation
Fig. 1 is TD-LTE system frame structure schematic diagram in prior art;
Fig. 2 is the schematic diagram of dynamic ascending-descending subframes allocative decision in the embodiment of the present invention;
Fig. 3 is TDD interference at crossed slot schematic diagram;
Between the TDD cell that Fig. 4 provides for the embodiment of the present invention, sub-frame configuration coordinates schematic flow sheet;
Fig. 5 A and Fig. 5 B is respectively sub-frame configuration between TDD cell that the embodiment of the present invention provides and coordinates signaling process schematic diagram;
The structural representation of the base station equipment that Fig. 6 provides for the embodiment of the present invention.
Embodiment
In order to realize the dynamic assignment of ascending-descending subframes, following scheme can be adopted: within the certain hour cycle, set four kinds of subframe type, comprise the subframe being fixed for downlink transfer, be fixed for the subframe of uplink, and flexible allocation is the subframe of upstream or downstream transmission.Figure 2 shows that example, the described time cycle is a radio frames (being only an example, also may be the other times cycle), wherein subframe #0, #5 is fixing descending sub frame, and subframe #2, #7 are fixing sub-frame of uplink, subframe #1, #6 is special subframe (also can be classified as in fixing descending sub frame), other subframes (#3, #4, #8, #9) for flexible allocation be upstream or downstream transmission subframe.For last class subframe, dynamic-configuration can be carried out according to real-time business demand and channel conditions in base station, to adapt to the dynamic change of business demand.
Only give the method for dynamic-configuration TDD subframe in such scheme, in systems in practice, if different communities is provided with different ascending-descending subframes configurations, then can cause the interference at crossed slot of neighbor cell, as shown in Figure 3.It is to be noted, here neighbor cell can be the community (as shown in Figure 3) of the geographically adjacent same TDD carrier wave of use, also can be the community (such as macrocell) that same layer is disposed, also can be the community (such as comprising macrocell, Microcell, Home eNodeB etc.) that layering is disposed.This type of interference at crossed slot for the impact of systematic function and deployment scenario and wireless environment etc. closely related, if such as close together between neighbor cell, or signal propagation conditions is better, then interference at crossed slot seriously can reduce the estate performance being in accepting state; If distant between neighbor cell, or there is effective signal and block, then interference at crossed slot level is for being in the estate performance impact of accepting state and little.
In above-mentioned solution, although give the method for TDD cell flexible configuration ascending-descending subframes, can not effectively solve interference at crossed slot having a strong impact on systematic function, the flexibility therefore introduced can not ensure even can reduce systematic function.
For the problems referred to above, the embodiment of the present invention gives the coordination system of sub-frame configuration between a kind of TDD cell, make adjacent TDD cell can the suitable TDD sub-frame allocation mode of way selection through consultation, thus evade the adverse effect of interference at crossed slot to systematic function.
In the embodiment of the present invention, suppose that the adjacent TDD cell in consolidated network is be time synchronized community here, and the neighbor cell mentioned can be with neighbor cell frequently, also can be the neighbor cell of adjacent frequency here.
In the embodiment of the present invention, when TDD base station cell judges to need to carry out sub-frame configuration change to this base station cell, send sub-frame configuration as TDD base station cell, source to adjacent target TDD base station cell and change request, the feedback information that receiving target TDD base station cell is replied, according to the feedback information received, judge whether to carry out described sub-frame configuration change to this base station cell, and when being judged as YES, this base station cell is carried out to the relative set of sub-frame configuration.Further, when TDD base station cell to receive after sub-frame configuration that TDD base station cell, source sends changes request message as target TDD base station cell, cross time-slot and the interference at crossed slot level when there is cross time-slot whether is there is between the current sub-frame configuration of the sub-frame configuration expected according to TDD base station cell, this source and this base station cell, determine that the sub-frame configuration accepting or refuse TDD base station cell, this source changes request, and return the feedback information accepting or refuse this sub-frame configuration change request to TDD base station cell, source.
Below in conjunction with accompanying drawing, the embodiment of the present invention is described in detail.
See Fig. 4, for sub-frame configuration between the TDD cell that the embodiment of the present invention provides coordinates schematic flow sheet, as shown in the figure, this flow process can comprise the following steps:
Step 401, TDD base station cell, source judges whether to need to carry out the change of TDD sub-frame configuration.
In this step, TDD base station cell, source can judge whether to need to carry out the change of TDD sub-frame configuration according to self-demand and residing wireless environment situation.Concrete, the factor that TDD base station cell, source carries out considering when the change of TDD sub-frame configuration judges includes but not limited to following one or several arbitrarily:
A up-downgoing business proportion demand that TDD base station cell, () source is current.Such as, if downlink business increase in demand uplink service demand minimizing simultaneously, then part sub-frame of uplink can be changed and join for descending sub frame.
TDD base station cell, (b) source uplink interference level.Such as, if sub-frame of uplink interference level is higher, then can be higher and determine to disturb its transmission direction of sub-frame of uplink corresponding to the downstream signal coming from adjacent base station community to change to join for descending sub frame by measuring interference level.Concrete, if the sub-frame of uplink of TDD base station cell, source is because coming from the interference of adjacent TDD base station cell downstream signal, cause interference level higher than setting threshold, then this interference level is changed to descending sub frame higher than the sub-frame of uplink of setting threshold.
The descending interference level in TDD base station cell, (c) source.Such as, if descending sub frame interference level is higher, then can be higher and determine that interference comes from adjacent base station community UE(UserEquipment, subscriber equipment by measuring interference level) upward signal launch corresponding to its transmission direction of descending sub frame change and join for sub-frame of uplink.Concrete, if the descending sub frame of TDD base station cell, source is because coming from the interference of the upward signal of adjacent TDD base station cell UE, cause interference level higher than setting threshold, then this interference level is changed to sub-frame of uplink higher than the descending sub frame of setting threshold.
The interference indication information of d adjacent base station community that TDD base station cell, () source receives.Such as, adjacent base station community indicates certain sub-frame of uplink to receive stronger interference, if TDD base station cell, this source is configured with downlink transfer in the subframe of correspondence, is then changed and joins for sub-frame of uplink.Concrete, TDD base station cell, source is according to the interference indication information of the adjacent base station community received, if judge, the interference that this adjacent base station community has sub-frame of uplink to be subject to exceedes setting threshold, and this subframe is configured to descending sub frame in TDD base station cell, source, then this descending sub frame is changed to sub-frame of uplink by source TDD base station cell.
The transmitting power indication information of e adjacent base station community that TDD base station cell, () source receives.Such as, adjacent base station community indicating downlink transmitting power raises, if TDD base station cell, this source is configured with uplink in the subframe of correspondence, is then changed and joins for descending sub frame.
Step 402, if TDD base station cell, source judges to need to carry out the change of TDD sub-frame configuration, then sends TDD sub-frame configuration and changes request message to adjacent target TDD base station cell.
Concrete, this request message can include but not limited to the one or several arbitrarily of following information:
A TDD sub-frame configuration that TDD base station cell, () source is current;
B the target TDD sub-frame configuration changed is expected in TDD base station cell, () source;
C the reason changing TDD sub-frame configuration is expected in TDD base station cell, () source, such as, this reason can be business demand triggering or interference triggered etc.
D TDD base station cell, () source measures and between target TDD base station cell path loss;
E target TDD base station cell downstream signal power that TDD base station cell, () source receives;
TDD base station cell, (f) source downstream signal transmitting power.
Step 403, after target TDD base station cell receives the TDD sub-frame configuration change request message of TDD base station cell, source transmission, according to the target TDD sub-frame configuration that TDD base station cell, source is expected, check and the interference level of whether cross time-slot and cross time-slot between (when the demand of sub-frame configuration change is not now carried out in target TDD base station cell) that this base station cell is current or (when now there is the demand of carrying out sub-frame configuration change target TDD base station cell) TDD sub-frame configuration of expecting.Based on this, target TDD base station cell judges whether that the TDD sub-frame configuration accepting TDD base station cell, source changes request.
Especially, if the TDD sub-frame configuration that target TDD base station cell receives TDD base station cell, multiple source changes request message, then judge one by one for TDD base station cell, each source.
Concrete, the one or any several of following factor can be considered in target TDD base station cell in deterministic process:
Whether a subframe that () exists cross time-slot is the subframe that key message is transmitted in this target TDD base station cell.Such as, this target TDD base station cell is configured with the uplink control signal transmission of Random Access Channel or other keys at a certain sub-frame of uplink, and TDD base station cell, source is expected position corresponding for this subframe to change to join for downlink transfer, then may cause larger hydraulic performance decline to this target TDD base station cell, in such cases, the TDD sub-frame configuration change request of TDD base station cell, source can be refused in target TDD base station cell.
Path loss size between TDD base station cell, (b) source and this target TDD base station cell.Such as, if this path loss is less than pre-determined threshold, then may cause larger interference at crossed slot, in such cases, the TDD sub-frame configuration that TDD base station cell, source can be refused in target TDD base station cell changes request.Wherein, this path loss size can be obtained by one of following several mode:
Mode 1: this path loss is measured in TDD base station cell, source, and the circuit loss value measured is sent to target TDD base station cell;
Mode 2: target TDD base station cell is measured voluntarily and calculated this path loss.Such as, TDD base station cell, the source downstream signal transmitting power by knowing deducts TDD base station cell, the source downstream signal transmitting power that this target TDD base station cell receives and obtains;
Mode 3: the downstream signal power (being set to P_r) of this target TDD base station cell received by it is measured in TDD base station cell, source, and this target TDD base station cell is indirect calculation path loss (PL) accordingly.Such as, this target TDD base station cell downstream signal transmitting power is P_t, then PL=P_t-P_r.
C TDD base station cell, source downstream signal power that () target TDD base station cell receives.Such as, if this power that target TDD base station cell receives is greater than pre-determined threshold, then may cause larger interference at crossed slot, in such cases, the TDD sub-frame configuration that TDD base station cell, source can be refused in target TDD base station cell changes request.
Wherein, this received power size can be obtained by one of following several mode:
Mode 1: TDD base station cell, the source downstream signal power received by it is directly measured in target TDD base station cell;
Mode 2: target TDD base station cell is by knowing source TDD base station cell transmitting power and path loss between the two, and both subtract each other and obtain received power.
D the reason of TDD sub-frame configuration is changed in TDD base station cell, () source.Such as, when calculate or measure interference at crossed slot level similar, if due to cell-of-origin business demand trigger TDD sub-frame configuration change, then its priority can suitably lower than due to interference avoid and trigger TDD sub-frame configuration change priority.
Step 404, request is changed according to the TDD sub-frame configuration whether accepting TDD base station cell, source in target TDD base station cell, sends feedback message to TDD base station cell, source.
Concrete, this feedback message can include but not limited to the one or several arbitrarily of following information:
A () accepts or refusal TDD base station cell, source sub-frame configuration changes the indication information of asking;
B () refusal TDD base station cell, source sub-frame configuration changes the reason of request.Such as, indicate this base station cell (i.e. target TDD base station cell) not accept interference at crossed slot, or instruction TDD base station cell, source transmitting power is excessively high;
C TDD sub-frame configuration situation information that () target TDD base station cell is current;
The TDD sub-frame configuration mode of d TDD base station cell, source that () target TDD base station cell can accept;
The transmitting power of e TDD base station cell, source that () target TDD base station cell can accept.
Step 405, respective handling is carried out according to this feedback message after receiving the feedback message that target TDD base station cell returns in TDD base station cell, source.Such as, if the sub-frame configuration of TDD base station cell, refusal source, target TDD base station cell changes request, then TDD base station cell in source keeps present sub-frame configuration constant; If the sub-frame configuration that target TDD base station cell accepts TDD base station cell, source changes request, then source TDD changes base station cell current sub-frame configuration.
If TDD base station cell, source receives the feedback message of multiple target TDD base station cell, then comprehensively can carry out the setting of TDD sub-frame configuration, such as, if there is at least one target TDD base station cell to reply refuse information, then TDD base station cell in source keeps current sub-frame configuration constant.
Sub-frame configuration between above-mentioned TDD cell coordinates flow process, can carry out in different situations.Such as at least can be triggered in the following two kinds situation:
(1) when TDD cell base station, source opening initialization is complete, before TDD sub-frame configuration is set first;
(2) when in the normal course of operation of TDD cell base station, source, before needing to change TDD sub-frame configuration.
The signalling interactive process of the sub-frame configuration coordination flow process between above-mentioned TDD cell can be as shown in figure sa or figure.Wherein, Fig. 5 A shows the signaling process that target TDD base station cell accepts the sub-frame configuration change request of TDD base station cell, source, and the sub-frame configuration that Fig. 5 B shows TDD base station cell, refusal source, target TDD base station cell changes the signaling process of asking.
It should be noted that, corresponding information interaction approach does not limit in embodiments of the present invention, such as, can by the wireline interface between neighbor cell, as X2 interface or/and S1 interface etc. carry out alternately, also between neighbor cell, directly mutual and information transmission can be carried out by air interface.
By describing above and can finding out, sub-frame configuration coordinate scheme between the TDD cell that the embodiment of the present invention provides, make neighbor cell can the suitable TDD sub-frame allocation mode of way selection through consultation, thus evade the adverse effect of interference at crossed slot to systematic function, TDD sub-frame allocation mechanism flexibly can better be worked, namely while the flexibility of guarantee TDD sub-frame configuration, also avoid the impact of interference at crossed slot on systematic function to a certain extent, improve the availability of technical scheme.
Based on identical technical conceive, the embodiment of the present invention additionally provides a kind of base station, and this base station can be applicable to above-mentioned handling process.
See Fig. 6, be the structural representation of the base station that the embodiment of the present invention provides, as shown in the figure, this base station can comprise:
First judging module 601, for when this base station is as source base station, sub-frame configuration alteration of judgment is carried out to this base station cell, and when judgement carries out sub-frame configuration change for needs to this base station cell, sends sub-frame configuration to adjacent target BS and change request;
Second judging module 602, for when this base station is as target BS, judges whether that the sub-frame configuration accepting source base station changes request;
Feedback module 603, for when this base station is as target BS, returns whether accept the feedback information that described sub-frame configuration changes request to source base station;
Configuration module 604, for when this base station is as source base station, whether what return according to target BS accepts the feedback information that sub-frame configuration changes request, this base station cell is carried out to the relative set of sub-frame configuration.
In above-mentioned base station, the first judging module 601 can change the sub-frame configuration of carrying in request and expecting this base station cell in described sub-frame configuration; The sub-frame configuration that second judging module 602 can be expected according to source base station and this base station cell current or whether there is cross time-slot and interference at crossed slot level between the sub-frame configuration expected, determine to accept or the sub-frame configuration of refusal source base station changes and asks.
In above-mentioned base station, the first judging module 601 according to one of following foundation or combination in any, can carry out sub-frame configuration alteration of judgment to this base station cell:
A up-downgoing business proportion demand that () this base station cell is current;
The uplink interference level of (b) this base station cell; Concrete; If this base station cell receives sub-frame of uplink signal be subject to the interference coming from adjacent base station cell downlink signal, and interference level is higher than setting threshold, then this interference level is changed to descending sub frame higher than the sub-frame of uplink of setting threshold.
The descending interference level of (c) this base station cell; Concrete, if the user of this base station cell receives the interference that descending sub frame signal is subject to the upward signal coming from adjacent base station cell user equipment, and interference level is higher than setting threshold, then this interference level is changed to sub-frame of uplink higher than the descending sub frame of setting threshold.
The interference indication information of d adjacent base station community that () this concentrated community receives; Concrete, if this base station cell is according to the interference indication information of the adjacent base station community received, judge that the interference that this adjacent base station community has sub-frame of uplink to be subject to exceedes setting threshold, and this subframe is configured to descending sub frame in this base station cell, then this descending sub frame is changed to sub-frame of uplink.
The transmitting power indication information of e adjacent base station community that () this base station cell receives; Concrete, if according to the transmitting power indication information of the adjacent base station community received, this base station cell judges that the down transmitting power of this adjacent base station raises, and the corresponding subframe of this base station cell is sub-frame of uplink, then this sub-frame of uplink is changed to descending sub frame.
In above-mentioned base station, the first judging module 601 can change in request message in described sub-frame configuration and carry one of following information or combination in any:
The sub-frame configuration that this base station cell is expected;
The sub-frame configuration that this base station cell is current;
The reason changing sub-frame configuration is expected in this base station cell;
Path loss between that this base station cell measures and target BS community;
The target BS cell downlink signal power that this base station cell receives;
The downstream signal transmitting power of this base station cell.
In above-mentioned base station, the second judging module 602 according to one of following foundation or combination in any, can determine that the sub-frame configuration accepting or refuse source base station changes request:
Whether a subframe that () exists cross time-slot is the subframe that key message is transmitted in this base station cell; Concrete, if this base station cell is configured with the transmission of crucial uplink control signal at the sub-frame of uplink that there is cross time-slot, and origin base station cell expects position corresponding for this subframe to change to downlink transfer, then the sub-frame configuration refusing origin base station cell changes request.
Path loss size between (b) origin base station cell and this base station cell; Concrete, if described path loss is less than pre-determined threshold, then the sub-frame configuration refusing TDD base station cell, source changes request.
C origin base station cell downstream signal power that () this base station cell receives; Concrete, if the described power that this base station cell receives is greater than pre-determined threshold, then the sub-frame configuration refusing TDD base station cell, source changes request.
D the reason of sub-frame configuration is changed in () origin base station cell.
In above-mentioned base station, one of following information or combination in any can be carried on described feedback message and return to source base station by feedback module 603:
Accept or refuse the indication information that origin base station cell sub-frame configuration changes request;
Refusal origin base station cell sub-frame configuration changes the reason of request;
The sub-frame configuration that this base station cell is current;
The sub-frame configuration mode of the origin base station cell that this base station cell can accept;
The transmitting power of the origin base station cell that this base station cell can accept.
In above-mentioned base station, configuration module 604 can be specifically for: if this base station receives the feedback message of multiple target BS community, then the feedback information of comprehensive described multiple target BS community, carries out the setting of this base station cell sub-frame configuration.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add required general hardware platform by software and realize, and can certainly pass through hardware, but in a lot of situation, the former is better execution mode.Based on such understanding, technical scheme of the present invention can embody with the form of software product the part that prior art contributes in essence in other words, this computer software product is stored in a storage medium, comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform method described in each embodiment of the present invention.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the device in embodiment can carry out being distributed in the device of embodiment according to embodiment description, also can carry out respective change and be arranged in the one or more devices being different from the present embodiment.The module of above-described embodiment can merge into a module, also can split into multiple submodule further.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
Be only several specific embodiment of the present invention above, but the present invention is not limited thereto, the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (24)
1. a TDD minizone sub-frame configuration coordination approach, is characterized in that, comprising:
Sub-frame configuration alteration of judgment is carried out to this base station cell in TDD base station cell, source, and when judgement carries out sub-frame configuration change for needs to this base station cell, sends sub-frame configuration change request to adjacent target TDD base station cell; Wherein, described sub-frame configuration changes the sub-frame configuration of carrying in request message and expecting active TDD base station cell, and one of following information or combination in any:
The sub-frame configuration that TDD base station cell, source is current;
The reason changing sub-frame configuration is expected in TDD base station cell, source;
That TDD base station cell, source measures and between target TDD base station cell path loss;
The target TDD base station cell downstream signal power that TDD base station cell, source receives;
The downstream signal transmitting power of TDD base station cell, source;
TDD base station cell, described source receives the described sub-frame configuration that whether accepts of replying described target TDD base station cell and changes the feedback information of asking, and according to described feedback information, this base station cell is carried out to the relative set of sub-frame configuration;
Wherein, described feedback information comprises one of following information or combination in any:
TDD base station cell, refusal source sub-frame configuration changes the reason of request;
The sub-frame configuration mode of the TDD base station cell, source that target TDD base station cell can accept;
The transmitting power of the TDD base station cell, source that target TDD base station cell can accept.
2. the method for claim 1, is characterized in that, described sub-frame configuration changes the sub-frame configuration of carrying in request and expecting active TDD base station cell;
The sub-frame configuration that described target TDD base station cell is expected according to TDD base station cell, described source and this base station cell current or whether there is cross time-slot and interference at crossed slot level between the sub-frame configuration expected, determine that the sub-frame configuration accepting or refuse TDD base station cell, described source changes request.
3. the method for claim 1, is characterized in that, sub-frame configuration alteration of judgment, according to one of following foundation or combination in any, is carried out to this base station cell in TDD base station cell, source:
The up-downgoing business proportion demand that TDD base station cell, source is current;
The uplink interference level of TDD base station cell, source;
The descending interference level of TDD base station cell, source;
The interference indication information of the adjacent base station community that TDD base station cell, source receives;
The transmitting power indication information of the adjacent base station community that TDD base station cell, source receives.
4. method as claimed in claim 3, it is characterized in that, TDD base station cell, source carries out sub-frame configuration alteration of judgment according to its uplink interference level to this base station cell, comprising:
If TDD base station cell, source receives sub-frame of uplink signal be subject to the interference coming from adjacent TDD base station cell downstream signal, and interference level is higher than setting threshold, then this interference level is changed to descending sub frame higher than the sub-frame of uplink of setting threshold.
5. method as claimed in claim 3, it is characterized in that, TDD base station cell, source carries out sub-frame configuration alteration of judgment according to its descending interference level to this base station cell, comprising:
If the user of TDD base station cell, source receives the interference that descending sub frame signal is subject to the upward signal coming from adjacent TDD base station cell subscriber equipment, and interference level is higher than setting threshold, then this interference level is changed to sub-frame of uplink higher than the descending sub frame of setting threshold.
6. method as claimed in claim 3, it is characterized in that, sub-frame configuration alteration of judgment is carried out according to the interference indication information of the adjacent base station community received in TDD base station cell, source, comprising:
TDD base station cell, source is according to the interference indication information of the adjacent base station community received, if judge, the interference that this adjacent base station community has sub-frame of uplink to be subject to exceedes setting threshold, and this subframe is configured to descending sub frame in TDD base station cell, source, then this descending sub frame is changed to sub-frame of uplink by source TDD base station cell.
7. method as claimed in claim 3, it is characterized in that, sub-frame configuration alteration of judgment is carried out according to the transmitting power indication information of the adjacent base station community received in TDD base station cell, source, comprising:
According to the transmitting power indication information of the adjacent base station community received, TDD base station cell, source judges that the down transmitting power of this adjacent base station raises, and the corresponding subframe of TDD base station cell, source is sub-frame of uplink, then this sub-frame of uplink is changed to descending sub frame by source TDD base station cell.
8. the method for claim 1, is characterized in that, described target TDD base station cell, according to one of following foundation or combination in any, determines that the sub-frame configuration accepting or refuse TDD base station cell, source changes request:
Whether the subframe that there is cross time-slot is the subframe that key message is transmitted in this base station cell;
Path loss size between TDD base station cell, source and this base station cell;
TDD base station cell, the source downstream signal power that target TDD base station cell receives;
The reason of sub-frame configuration is changed in TDD base station cell, source.
9. method as claimed in claim 8, is characterized in that, whether target TDD base station cell is the subframe of this base station cell transmission key message according to the subframe that there is cross time-slot, determines to accept or the sub-frame configuration of refusal TDD base station cell, source changes request, comprising:
If target TDD base station cell is configured with the transmission of crucial uplink control signal at the sub-frame of uplink that there is cross time-slot, and TDD base station cell, source expects position corresponding for this subframe to change to downlink transfer, then the sub-frame configuration of TDD base station cell, target TDD base station cell refusal source changes request.
10. method as claimed in claim 8, is characterized in that, target TDD base station cell, according to the path loss size between TDD base station cell, source and this base station cell, is determined that the sub-frame configuration accepting or refuse TDD base station cell, source changes request, being comprised:
If described path loss is less than pre-determined threshold, then the sub-frame configuration of TDD base station cell, target TDD base station cell refusal source changes request.
11. methods as claimed in claim 8, is characterized in that, target TDD base station cell, according to TDD base station cell, the source downstream signal power received, is determined that the sub-frame configuration accepting or refuse TDD base station cell, source changes request, being comprised:
If the described power that target TDD base station cell receives is greater than pre-determined threshold, then the sub-frame configuration of TDD base station cell, target TDD base station cell refusal source changes request.
12. the method for claim 1, is characterized in that, TDD base station cell, described source, according to the described feedback information received, judges whether to carry out described sub-frame configuration change to this base station cell, comprising:
If TDD base station cell, source receives the feedback message of multiple target TDD base station cell, then the feedback information of comprehensive described multiple target TDD base station cell, carries out the setting of TDD sub-frame configuration.
13. 1 kinds of base stations, are applied to TDD system, it is characterized in that, comprising:
First judging module, for when this base station is as source base station, sub-frame configuration alteration of judgment is carried out to this base station cell, and when judgement carries out sub-frame configuration change for needs to this base station cell, sends sub-frame configuration to adjacent target BS and change request; Specifically for, the sub-frame configuration carrying in request message and expect this base station cell is changed in described sub-frame configuration, and one of following information or combination in any:
The sub-frame configuration that this base station cell is current;
The reason changing sub-frame configuration is expected in this base station cell;
Path loss between that this base station cell measures and target BS community;
The target BS cell downlink signal power that this base station cell receives;
The downstream signal transmitting power of this base station cell
Second judging module, for when this base station is as target BS, judges whether that the sub-frame configuration accepting source base station changes request;
Feedback module, for when this base station is as target BS, returns whether accept the feedback information that described sub-frame configuration changes request to source base station;
Configuration module, for when this base station is as source base station, whether what return according to target BS accepts the feedback information that sub-frame configuration changes request, this base station cell is carried out to the relative set of sub-frame configuration;
Wherein, described feedback module specifically for, one of following information or combination in any are carried on described feedback message and return to source base station:
Refusal origin base station cell sub-frame configuration changes the reason of request;
The sub-frame configuration mode of the origin base station cell that this base station cell can accept;
The transmitting power of the origin base station cell that this base station cell can accept.
14. base stations as claimed in claim 13, is characterized in that, described first judging module specifically for, change the sub-frame configuration of carrying in request and expecting this base station cell in described sub-frame configuration;
Described second judging module specifically for, the sub-frame configuration expected according to source base station and this base station cell current or whether there is cross time-slot and interference at crossed slot level between the sub-frame configuration expected, determine to accept or the sub-frame configuration of refusal source base station changes and asks.
15. base stations as claimed in claim 13, is characterized in that, described first judging module specifically for, according to one of following foundation or combination in any, sub-frame configuration alteration of judgment is carried out to this base station cell:
The up-downgoing business proportion demand that this base station cell is current;
The uplink interference level of this base station cell;
The descending interference level of this base station cell;
The interference indication information of the adjacent base station community that this concentrated community receives;
The transmitting power indication information of the adjacent base station community that this base station cell receives.
16. base stations as claimed in claim 15, it is characterized in that, described first judging module specifically for, if this base station cell receives sub-frame of uplink signal and is subject to the interference coming from adjacent base station cell downlink signal, and interference level is higher than setting threshold, then this interference level is changed to descending sub frame higher than the sub-frame of uplink of setting threshold.
17. base stations as claimed in claim 15, it is characterized in that, described first judging module specifically for, if the user of this base station cell receives the interference that descending sub frame signal is subject to the upward signal coming from adjacent base station cell user equipment, and interference level is higher than setting threshold, then this interference level is changed to sub-frame of uplink higher than the descending sub frame of setting threshold.
18. base stations as claimed in claim 15, it is characterized in that, described first judging module specifically for, if this base station cell is according to the interference indication information of the adjacent base station community received, judge that the interference that this adjacent base station community has sub-frame of uplink to be subject to exceedes setting threshold, and this subframe is configured to descending sub frame in this base station cell, then this descending sub frame is changed to sub-frame of uplink.
19. base stations as claimed in claim 15, it is characterized in that, described first judging module specifically for, if according to the transmitting power indication information of the adjacent base station community received, this base station cell judges that the down transmitting power of this adjacent base station raises, and the corresponding subframe of this base station cell is sub-frame of uplink, then this sub-frame of uplink is changed to descending sub frame.
20. base stations as claimed in claim 13, is characterized in that, described second judging module specifically for, according to one of following foundation or combination in any, determine accept or refusal source base station sub-frame configuration change request:
Whether the subframe that there is cross time-slot is the subframe that key message is transmitted in this base station cell;
Path loss size between origin base station cell and this base station cell;
The origin base station cell downstream signal power that this base station cell receives;
The reason of sub-frame configuration is changed in origin base station cell.
21. base stations as claimed in claim 20, it is characterized in that, described second judging module specifically for, if this base station cell is configured with the transmission of crucial uplink control signal at the sub-frame of uplink that there is cross time-slot, and origin base station cell expects position corresponding for this subframe to change to downlink transfer, then the sub-frame configuration refusing origin base station cell changes request.
22. base stations as claimed in claim 20, is characterized in that, described second judging module specifically for, if described path loss is less than pre-determined threshold, then refuse TDD base station cell, source sub-frame configuration change request.
23. base stations as claimed in claim 20, is characterized in that, described second judging module specifically for, if the described power that this base station cell receives is greater than pre-determined threshold, then refuse TDD base station cell, source sub-frame configuration change request.
24. base stations as claimed in claim 13, it is characterized in that, described configuration module specifically for, if this base station receives the feedback message of multiple target BS community, then the feedback information of comprehensive described multiple target BS community, carries out the setting of this base station cell sub-frame configuration.
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| CN201110144583.1A CN102215534B (en) | 2011-05-31 | 2011-05-31 | Sub-frame configuration coordination approach and device thereof between a kind of TDD cell |
| PCT/CN2012/072948 WO2012163151A1 (en) | 2011-05-31 | 2012-03-23 | Method for coordinating sub-frame configuration between tdd cells and device thereof |
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