CN103379653B

CN103379653B - Instruction TD-LTE terminal receives the method and apparatus of descending pilot frequency time slot

Info

Publication number: CN103379653B
Application number: CN201210130118.7A
Authority: CN
Inventors: 仲华
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2012-04-27
Filing date: 2012-04-27
Publication date: 2016-05-25
Anticipated expiration: 2032-04-27
Also published as: CN103379653A

Abstract

The invention discloses the method and apparatus that a kind of TD-LTE of instruction terminal receives descending pilot frequency time slot, avoid the reception of TD-LTE terminal up transmission UpPTS and special subframe DwPTS to clash. Described method comprises: if judge that the TA value in the message that sends to TD-LTE terminal is greater than default maximum TA threshold value, in this message, carry and close instruction, and the not Physical Downlink Shared Channel for this TD-LTE terminal in this DwPTS scheduling of network side is set, this closes instruction and is used to indicate TD-LTE terminal and closes the reception of DwPTS. Described device comprises judge module, sending module and module is set. Can adopt the inventive method and device, RAR and TA that terminal send according to network? instruction in CE, determines whether close in advance the reception of DwPTS, receives the situation of conflicting thereby avoid UpPTS to send with DwPTS.

Description

Instruction TD-LTE terminal receives the method and apparatus of descending pilot frequency time slot

Technical field

GSM of the present invention, is specifically related to LTE (LongTermEvolution, Long Term Evolution)Under TDD (TimeDivisionDuplexing, time division duplex) standard, indicate TD-LTE (TimeDivisionLongTermEvolution, timesharing Long Term Evolution) terminal reception DwPTS (descending pilot frequency time slot)Method and apparatus.

Background technology

The frame structure of LTETDD pattern as shown in Figure 1, adopts type 2 wireless frame structures, eachThe field that 10ms radio frames is 5ms by two length forms, and each half frame length is 5ms, by 4Individual data burst and 1 special subframe composition, wherein 4 data bursts take 8 conventional time slots, 1Individual special subframe comprise DwPTS (descending pilot frequency time slot), GP (protection time slot) and UpPTS (onRow pilot time slot) three special time slots, total length is 1ms. The wherein length of DwPTS and UpPTSConfigurable, the length of DwPTS is 3～12 OFDM symbols, and the length of UpPTS is 1～2OFDM symbol, corresponding GP length is 1～10 OFDM symbol, DwPTS, GP and UpPTSThe total length of three time slots is 1ms. UpPTS can be used for uplink, and DwPTS can be used for descending biographyDefeated.

LTE supports 5ms and 10ms up-downgoing switching point. For 5ms up-downgoing switching cycle, as figureShown in 1, subframe (Subframe) 2 and 7 is always as up. For 10ms up-downgoing switching cycle,Each field (half-frame) has DwPTS; Only in the 1st field, there are GP and UpPTS,The DwPTS length of the 2nd field is 1ms. UpPTS and subframe 2 are used as up, subframe 7 and 9As descending.

In the actual deployment of network, can be according to radius of society and BS-BS (BaseStation, base station)Disturbed condition, reasonable disposition special subframe, make GP reach guarantee can accept to disturb rank and to timingIn advance (TA, TimingAdvanced) do not have effect, and GP value is greater than maximum timing and carriesFront amount+fixing Timing Advance+downstream-to-upstream radio frequency switching time, to ensure that user terminal can be timelyDecoding PDSCH (PhysicalDownlinkSharedChannel, Physical Downlink Shared Channel) and andTime be switched to the up transmission of UpPTS. But changeable due to wireless environment, likely occurs with conditions at the lower levelsCondition: TA (timing advance) value that user receives can cause the UpPTS of the up transmission of terminal to exceed GP,Overlapping with DwPTS, cause terminal or have little time to process DwPTS, or it is not complete to send upstream dataWhole.

Summary of the invention

When the technical problem to be solved in the present invention is to provide a kind of instruction TD-LTE terminal reception descending pilot frequencyThe method and apparatus of gap, avoids the up transmission of TD-LTE terminal UpPTS and special subframe DwPTSReception clashes.

For solving the problems of the technologies described above, the invention provides a kind of instruction TD-LTE terminal and receive descending leadingFrequently the method for time slot, comprising:

If judge that timing advance (TA) value in the message that sends to TD-LTE terminal is greater than defaultMaximum TA threshold value is carried and is closed instruction, and network side is set not at this DwPTS in this messageScheduling is for the Physical Downlink Shared Channel of this TD-LTE terminal, and this is closed instruction and is used to indicate TD-LTETerminal is closed the reception of descending pilot frequency time slot (DwPTS).

Further, described method also comprises: if judged in the message that sends to TD-LTE terminalTA value is not more than default maximum TA threshold value, in this message, carries and opens instruction, and this unlatching refers toShow the reception that is used to indicate TD-LTE terminal unlatching DwPTS.

Further, before judgement, described method also comprises: to TD-LTE terminal broadcast transmission placeReason instruction, for notifying TD-LTE terminal current area to support the instruction of closing of DwPTS.

Further, described default maximum TA threshold value is: ensure that TD-LTE terminal sends upThe time of pilot time slot (UpPTS) not can with the TA value of time-interleaving that receives DwPTS.

Further, described message comprises: accidental access response (RAR) message or TA control moduleMessage or newly-increased MAC Control Element message.

For solving the problems of the technologies described above, the present invention also provides a kind of TD-LTE terminal to receive descending pilot frequencyThe indicating means of time slot, comprising:

The message of TA value is carried in reception, if judge in message and carry and close instruction, closes DwPTSReception, carry out uplink synchronous according to described TA value, send upstream data.

Further, described method also comprises: if judge that carrying unlatching in message indicates, and opensThe reception of DwPTS.

Further, before judgement, described method also comprises: receive the processing instruction of broadcast transmission,This processing instruction is for notifying current area to support the instruction of closing of DwPTS.

For solving the problems of the technologies described above, it is descending that the present invention also provides a kind of instruction TD-LTE terminal to receiveThe device of pilot time slot, comprises judge module, sending module and module is set, wherein:

Described judge module: whether large for judging the TA value of the message that sends to TD-LTE terminalIn default maximum TA threshold value;

Described sending module, for sending to the message of TD-LTE terminal in described judge module judgementTA value while being greater than default maximum TA threshold value, in this message, carry and close instruction, this is closedInstruction is used to indicate TD-LTE terminal and closes the reception of DwPTS;

The described module that arranges, for sending and close after instruction at sending module, arranges network side not at thisDwPTS scheduling is for the Physical Downlink Shared Channel of this TD-LTE terminal.

For solving the problems of the technologies described above, the present invention also provides a kind of descending pilot frequency time slot that receivesTD-LTE terminal, comprises receiver module, judge module and control module, wherein:

Described receiver module, for receiving the message of carrying TA value;

Described judge module, closes instruction for judging whether message carries;

Described control module, closes when instruction for judging that at described judge module message is carried, and closesThe reception of DwPTS, carries out uplink synchronous according to described TA value, sends upstream data.

Adopt embodiment of the present invention method and apparatus, the large radius of society under LTETDD pattern, UEUnder scene in cell edge, the instruction in RAR and TACE that terminal can send according to network,The reception that determines whether to close in advance DwPTS, correctly sends upstream data according to timing advance value, fromReceive the situation of conflicting and avoid UpPTS to send with DwPTS.

Brief description of the drawings

Fig. 1 is LTETDD model frame structure chart;

Fig. 2 is the embodiment of the present invention 1 flow chart;

Fig. 3 is TACE message structure figure;

Fig. 4 is RAR message structure figure;

Fig. 5 is new definition MAC Control Element message structure figure;

Fig. 6 is the embodiment of the present invention 2 flow charts;

Fig. 7 is the embodiment of the present invention 3 network side apparatus structural representations;

Fig. 8 is the embodiment of the present invention 4 end side apparatus structure schematic diagrames;

Fig. 9 is application example 1 flow chart;

Figure 10 is application example 2 flow charts.

Detailed description of the invention

Find by analysis, the UpPTS that the TA value of receiving when terminal causes terminal to send exceeds GP, shadowRing to the reception of the DwPTS as PDSCH, due to terminal parses PDCCH (PhysicalDownlinkControlChannel, Physical Downlink Control Channel) judge whether to exist the downlink resource of correspondence oneself to divideThere is time delay in that joins, cannot close in advance DwPTS and open uplink; If by the time resolvedAfter PDCCH, judgement does not have downlink resource to distribute, and can cause up transmission imperfect.

Therefore, network need to shift to an earlier date indicating terminal and close in time the reception of DwPTS. When network side judgementIf while can causing the up transmission of terminal and DwPTS to receive overlapping possibility to the TA value of terminal, logicalKnow that terminal closes the reception of DwPTS in advance, network side can be in DwPTS scheduling for this terminal yetPDSCH, avoids the up transmission of terminal to conflict with special subframe DwPTS with this.

For making the object, technical solutions and advantages of the present invention clearer, hereinafter in connection with accompanying drawingEmbodiments of the invention are elaborated. It should be noted that, in the situation that not conflicting, this ShenPlease in embodiment and the feature in embodiment can mutually be combined.

Embodiment 1

The present embodiment is described network side, and how indicating terminal receives DwPTS, as shown in Figure 2, comprises followingStep:

Step 110, if judge that the TA value in the message that sends to TD-LTE terminal is greater than defaultMaximum TA threshold value, performs step 120;

Preferably, before step 110, first process instruction to TD-LTE terminal broadcast transmission, forThe instruction of closing of DwPTS is supported in notice TD-LTE terminal current area. When network and terminal are all given tacit consent toSupport closing while instruction of DwPTS, this step can be omitted.

Step 120 is carried and is closed instruction in this message, and this is closed instruction and is used to indicate TD-LTE eventuallyEnd is closed the reception of DwPTS;

Step 130, arranges network side and does not share letter in this DwPTS scheduling for the physical down of this terminalRoad (PDSCH).

Above-mentioned steps 120 can be carried out with step 130 simultaneously.

Particularly, network can be at UE in connecting the RAR message that send while setting up state or in connected stateTime send TACE (controlelement, timing advance control module) message in carry indicating userWhether can close in advance the instruction of closing of DwPTS reception. Concrete grammar is as follows:

Network side, for the combination of each sub-frame configuration and special subframe configuration, is arranged under this kind of combinationMaximum TA threshold value, once send to the TA value in RAR message or the TA message of UEBe greater than the maximum TA threshold value of setting, the upstream data that may cause UE to send exceeds GP, withWhen DwPTS is overlapping, in RAR or TA message, corresponding bits indicating user is set and can closes DwPTSReception, send data according to the ascending resource of network scheduling. Meanwhile, network side is guaranteed arrangingAfter corresponding bits, the not PDSCH for this UE in DwPTS scheduling.

In the time that network side judgement sends to the TA value of UE to be not more than to preset maximum TA threshold value, can beIn message, carry and open instruction, the reception that is used to indicate terminal and opens DwPTS, now network side can beThis DwPTS scheduling is for the PDSCH of this UE.

The bit (with reference to 36.321) of first or second reservation of TACE message for example, can be setFor the reception of closing or opening DwPTS is set, Figure 3 shows that TACE message structure figure, whereinR is reservation bit; TimingAdvanceCommand (TA order) is used to indicate T_A(0，1，2...63)Index value. For example can utilize R to carry and close or open instruction, it is that 1 expression is closed that R is for example setDwPTS receives, and equals 0 expression and opens DwPTS reception, and UE carries out work according to setting, untilReceive new setting.

Or, the bit (with reference to 36.321) of first reservation of first byte in RAR message is setFor the reception of closing or opening DwPTS is set, Figure 4 shows that RAR message structure figure, wherein RFor reservation bit; TimingAdvanceCommand (TA order) is used to indicate T_A(0，1，2...1282)Index value; ULGrant (up license domain) is used to indicate ascending resource; TemporaryC-RNTI (facesTime Cell Radio Network Temporary Identifier/Identity, Cell-RNTI territory) be used to indicate the temporary mark that UE in random access procedure uses.It is that DwPTS reception is closed in 1 expression that R is for example set, and equals 0 expression and opens DwPTS reception, UECarry out work according to setting, until receive new setting.

Except arranging RAR message and TA message, can also define a new MAC Control ElementMessage is carried the descending instruction that is used to indicate UE and closes or open the reception of DwPTS. As shown in Figure 5,What wherein D bit instruction DwPTS received closes or opens.

Embodiment 2

The present embodiment is described terminal and how to be received DwPTS, as shown in Figure 6, comprises the following steps:

Step 210, receives the message of carrying TA value;

Preferably, before receiving above-mentioned message, also receive the processing instruction of broadcast transmission, this processing refers toShow for notifying current area to support the instruction of closing of DwPTS. When network and terminal are all given tacit consent to supportDwPTS closes while instruction, and this step can be omitted.

Step 220, if judge in message and carry and close instruction, closes the reception of DwPTS, according toDescribed TA value is carried out uplink synchronous, sends upstream data.

Open instruction, the reception of opening DwPTS if carried in terminal judges message.

Above-mentioned message comprises: RAR message or TA control module message or newly-increased MAC Control Element disappearBreath.

Embodiment 3

The present embodiment introduction realizes the network side apparatus of embodiment 1 method, as shown in Figure 7, comprising: sentenceDisconnected module, sending module and module is set, wherein:

This judge module: whether be greater than for the TA value that judges the message that sends to TD-LTE terminalDefault maximum TA threshold value;

This sending module, for sending to the message of TD-LTE terminal in the judgement of described judge moduleWhen TA value is greater than default maximum TA threshold value, in this message, carries and close instruction, this closes instructionBe used to indicate TD-LTE terminal and close the reception of DwPTS;

This arranges module, for sending and close after instruction at sending module, network side is set not at thisDwPTS scheduling is for the Physical Downlink Shared Channel of this terminal.

Preferably, above-mentioned sending module also for: send to TD-LTE terminal in judge module judgementWhen TA value in message is not more than default maximum TA threshold value, in this message, carries and open instruction,The reception that this unlatching instruction is used to indicate TD-LTE terminal opens DwPTS. If said apparatus is independentExist with network equipment, can send notice to network equipment, informed that it can beDwPTS scheduling is for the PDSCH of this terminal.

Preferably, this sending module also for: to TD-LTE terminal broadcast transmission process instruction, forThe instruction of closing of DwPTS is supported in notice TD-LTE terminal current area.

Embodiment 4

The present embodiment introduction realizes the terminal of embodiment 2 methods, as shown in Figure 8, comprising: receiver module,Judge module and control module, wherein:

This receiver module, for receiving the message of carrying TA value;

This judge module, closes instruction for judging whether message carries;

This control module, closes when instruction for judging that at described judge module message is carried, and closesThe reception of DwPTS, carries out uplink synchronous according to described TA value, sends upstream data.

Preferably, this judge module also can be used for judging in message whether carry and open instruction; This control mouldPiece is also opened when instruction, the reception of opening DwPTS for judging that at judge module message is carried.

Preferably, this receiver module is also for receiving the processing instruction of broadcast transmission, and this processing instruction is used forThe instruction of closing of DwPTS is supported in notice current area.

Application example 1

Taking base station as network side apparatus as example, how explanation indicates TD-LTEUE to receive DwPTS below,In this example, base station is set up the UE reception of state or does not receive in connecting by the instruction of RAR messageDwPTS. As shown in Figure 9, comprise the following steps:

Step 1, UE judges that according to the DwPTS relevant treatment instruction in cell broadcast information this community isNo support indicating downlink pilot time slot receives, if community supports indicating downlink pilot time slot to receive, and UEThink that the related bits or the message that receive about DwPts in following steps are effective; If community is not supported to refer toShow descending pilot frequency time slot receive or broadcast system information in do not comprise indicating downlink pilot time slot receiveContent, UE thinks that the related bits or the message that receive about DwPts in following steps are invalid;

Preferably, this processing instruction can be in SIB1 or SIB2, to increase by one to be used to indicate this communityWhether support the IE that indicating downlink pilot time slot receives.

Consider the compatibility of realization, by indicating current area whether to possess that this is descending in system messageDeixis, thus avoiding occurring occurs relevant field to understand because version difference causes UE and networkInconsistent situation.

Step 2:UE is at be stationed community initiating random access procedure;

The main purpose of random access procedure may be: RRC connects the request of foundation; RRC connection reconstruction pleaseAsk; Support the handoff procedure between eNodeB; Obtain or recover uplink synchronous; PDCCHORDERTrigger etc.

Step 3: base station receives the lead code (preamble) that UE sends, judges the distance of UE and base stationFrom, generate the TA value in RAR (accidental access response) message, sentence in conjunction with special subframe configuration simultaneouslyWhether disconnected UE uses this TA value can cause the up transmission of UE to exceed GP, if not can; RAR is setIn the DwPTS that closes be received as 0, the simultaneously corresponding PDSCH of normal consistency DwPTS; IfCan exceed the DwPTS that closes that GP arranges in RAR and be received as 1, not dispatch DwPTS institute simultaneously rightThe PDSCH answering, particularly, does not dispatch the PDSCH for this terminal;

Base station can judge UE uses this TA value whether can cause up of UE according to art methodsSend and exceed GP. Owing to having defined the length of GP, UpPts and DwPts under different sub-frame configuration in specification,Therefore base station is by calculating TA order when transmission that can judge according to specifying, and UE sends UpPtSWhether can conflict mutually with reception DwPTS.

Step 4:UE receives RAR, processes DwPTS according to the instruction of whether closing in advance DwPTSReception, then send Msg3;

Step 5:UE and base station collaborative work, complete access procedure, enters connected state.

Application example 2

Taking base station as network side apparatus as example, how explanation indicates TD-LTEUE to receive DwPTS below,In this example, base station indicates the UE in connected state to receive or do not receive DwPTS by TA message.As shown in figure 10, comprise the following steps:

Step 1: in connected state, upstream data or upward signal that base station sends according to UE carry out TAMeasure, generate TA and adjust instruction, base station is sentenced in conjunction with special subframe configuration according to TA value wherein simultaneouslyWhether disconnected UE uses this TA value can cause the up transmission of UE to exceed GP, if not can; RAR is setIn the DwPTS that closes be received as 0, the simultaneously corresponding PDSCH of normal consistency DwPTS; IfCan exceed the DwPTS that closes that GP arranges in RAR and be received as 1, not dispatch DwPTS institute simultaneously rightThe PDSCH answering, particularly, does not dispatch the PDSCH for this terminal;

In the time that network side need to carry the TA message of descending instruction to terminal transmission, can first broadcast to terminalTransmission processing instruction, notification terminal current area supports descending instruction (to comprise the instruction of closing of DwPTSOr the unlatching of DwPTS instruction).

Step 2: user receives TA and adjusts order, according to the instruction processing of whether closing in advance DwPTSThe reception of DwPTS, then adjusts uplink synchronous according to TA value wherein and distributes according to corresponding resourceSend upstream data or upward signal;

Idle state is returned in step 3:UE end data transmitting-receiving, or resends preamble and connectEnter process.

One of ordinary skill in the art will appreciate that all or part of step in said method can pass through programCarry out instruction related hardware and complete, described program can be stored in computer-readable recording medium, as read-onlyMemory, disk or CD etc. Alternatively, all or part of step of above-described embodiment also can be usedOne or more integrated circuits are realized. Correspondingly, the each module/unit in above-described embodiment can adoptThe form of hardware realizes, and also can adopt the form of software function module to realize. The present invention is not restricted to and appointsThe combination of the hardware and software of what particular form.

Certainly, the present invention also can have other various embodiments, is not deviating from spirit of the present invention and essence thereofIn situation, those of ordinary skill in the art work as can make according to the present invention various corresponding changes and distortion,But these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.

Claims

1. indicate TD-LTE terminal to receive a method for descending pilot frequency time slot, comprising:

If judge that timing advance (TA) value in the message that sends to TD-LTE terminal is greater than defaultMaximum TA threshold value is carried and is closed instruction, and network side is set not at this DwPTS in this messageScheduling is for the Physical Downlink Shared Channel of this TD-LTE terminal, and this is closed instruction and is used to indicate TD-LTETerminal is closed the reception of descending pilot frequency time slot (DwPTS);

Described method also comprises: if judge that the TA value in the message that sends to TD-LTE terminal is littleIn default maximum TA threshold value, in this message, to carry and open instruction, this unlatching instruction is used in reference toShow the reception of TD-LTE terminal unlatching DwPTS.

2. the method for claim 1, is characterized in that,

Before judgement, described method also comprises: process instruction to TD-LTE terminal broadcast transmission, useSupport the instruction of closing of DwPTS in notice TD-LTE terminal current area.

3. method as claimed in claim 1 or 2, is characterized in that:

Described default maximum TA threshold value is: ensure that TD-LTE terminal sends uplink pilot time slot(UpPTS) time not can with the TA value of time-interleaving that receives DwPTS.

4. method as claimed in claim 1 or 2, is characterized in that:

Described message comprises: accidental access response (RAR) message or TA control module message or newly-increasedMAC Control Element message.

5. TD-LTE terminal receives an indicating means for descending pilot frequency time slot, comprising:

The message of timing advance (TA) value is carried in reception, if judge in message and carry and close instruction,Close the reception of descending pilot frequency time slot (DwPTS), carry out uplink synchronous according to described TA value, sendUpstream data;

Described method also comprises: if judge that carrying unlatching in message indicates, and opens connecing of DwPTSReceive.

6. method as claimed in claim 5, is characterized in that:

Before judgement, described method also comprises: receive the processing instruction of broadcast transmission, this processing instructionSupport the instruction of closing of DwPTS for notifying current area.

7. the method as described in claim 5 or 6, is characterized in that:

8. indicate TD-LTE terminal to receive a device for descending pilot frequency time slot, comprise judge module, send outSend module and module is set, wherein:

Described judge module: for judging the timing advance (TA) of the message that sends to TD-LTE terminalWhether value is greater than default maximum TA threshold value;

Described sending module, for sending to the message of TD-LTE terminal in described judge module judgementTA value while being greater than default maximum TA threshold value, in this message, carry and close instruction, this is closedInstruction is used to indicate TD-LTE terminal and closes the reception of descending pilot frequency time slot (DwPTS);

The described module that arranges, for sending and close after instruction at sending module, arranges network side not at thisDwPTS scheduling is for the Physical Downlink Shared Channel of this TD-LTE terminal;

Described sending module is also for the message that sends to TD-LTE terminal in the judgement of described judge moduleIn TA value while being not more than default maximum TA threshold value, in this message, carry and open instruction, shouldOpen and indicate the reception that is used to indicate TD-LTE terminal unlatching DwPTS.

9. device as claimed in claim 8, is characterized in that:

Described sending module also for: to TD-LTE terminal broadcast transmission process instruction, for noticeThe instruction of closing of DwPTS is supported in TD-LTE terminal current area.

10. install as claimed in claim 8 or 9, it is characterized in that:

11. install as claimed in claim 8 or 9, it is characterized in that:

12. 1 kinds receive the TD-LTE terminal of descending pilot frequency time slot, comprise receiver module, judge moduleAnd control module, wherein:

Described receiver module, for receiving the message of carrying timing advance (TA) value;

Described judge module, closes instruction for judging whether message carries;

Described control module, closes when instruction for judging that at described judge module message is carried, and closesThe reception of descending pilot frequency time slot (DwPTS), carries out uplink synchronous according to described TA value, sends upData;

Described judge module, also opens instruction for judging whether message carries;

Described control module, also opens when instruction for judging that at described judge module message is carried, and beatsOpen the reception of descending pilot frequency time slot (DwPTS).

13. terminals as claimed in claim 12, is characterized in that:

Described receiver module is also for receiving the processing instruction of broadcast transmission, and this processing instruction is worked as for noticeThe instruction of closing of DwPTS is supported in front community.

14. terminals as described in claim 12 or 13, is characterized in that: