CN102780998B

CN102780998B - The maintaining method of cell synchronous and equipment

Info

Publication number: CN102780998B
Application number: CN201110122360.5A
Authority: CN
Inventors: 常俊仁; 曾清海; 李亚娟
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2011-05-12
Filing date: 2011-05-12
Publication date: 2016-01-06
Anticipated expiration: 2031-05-12
Also published as: CN102780998A

Abstract

The embodiment of the present invention relates to maintaining method and the equipment of cell synchronous.The embodiment of the present invention proposes a kind of method safeguarding cell synchronous, comprising: determine to need the deexcitation of maintain synchronization from community the one SCell; Obtain and send at a SCell SRS resource visited needed for logical reference signal SRS; According to SRS resource, a SCell sends SRS; Receive the response message corresponding with SRS, wherein response message carries the timing advance TA value of the synchronous adjustment for a SCell.According to the embodiment of the present invention, when can be implemented in many TA, as required synchronous maintenance is carried out to the SCell of deexcitation, when ensure that the SCell that quick active has been deactivated, can realize synchronous.

Description

The maintaining method of cell synchronous and equipment

Technical field

The present invention relates to the communications field, more particularly, relate to maintaining method and the equipment of cell synchronous.

Background technology

In order to meet IMT-Advanced (InternationalMobileTelecommunications-Advanced, be called for short " IMT-A ") demand, support the peak data rate up to 1Gbits/s, further enhancing system (ThirdGenerationPartnershipProjectLongTermEvolutionAdvanc ed is called for short " the 3GPPLTE-ADVANCED ") system of 3G (Third Generation) Moblie Partnership Program long evolving system has been agreed at present using the method for carrier convergence (CA) technology as its expanding system bandwidth.The main thought of carrier convergence is exactly that multiple component carrier (ComponentCarrier is called for short " CC ") is pooled a carrier wave higher than 20M, to support the defeated rate of high-speed data.

When UE uses multiple component carrier, in several circumstances, multiple component carriers that UE uses can not use identical Timing Advance (TimingAdvance is called for short " TA ") value.Such as, base station is configured with different component carriers on different repeaters (Repeater), or the component carrier of different frequency have passed through different scattering paths.Under this situation, the TA of different component carrier is different.Such as, UE uses two different component carriers to communicate with the access point of two non-cooperating, and two websites arrange two remote antenna heads or distributed wireless head respectively, and UE uses two different component carrier and this two websites to communicate.

In current LTE system, at subscriber equipment (UserEquipment, be called for short " UE ") transfer of data process in, logical reference signal (SoundingReferenceSignal is visited by sending, be called for short " SRS ") can accurate adjustment uplink timing advance, to keep higher uplink synchronous precision and higher throughput.Current SRS comprises two kinds, i.e. periodicity SRS and aperiodicity SRS.A feature of aperiodic SRS is can by multiple UE shared resource, and periodically SRS is then that UE is specific.

At current long evolving system (LongTermEvolution, be called for short " LTE ") R10 version in, because only consider the situation of single TA, and whenever, main plot (PrimaryCell is called for short " PCell ") is always activated, and other are from community (SecondaryCell, be called for short " SCell ") synchronous regime and PCell be consistent, therefore do not safeguard the synchronous regime of SCell.In many TA situation, the synchronous regime that some SCell cannot always be consistent with PCell, can cause like this when quick active deexcitation SCell because SCell may lose synchronously, and normally cannot use SCell.

Summary of the invention

Embodiment of the present invention technical problem to be solved is when there is multiple TA, safeguards the synchronous regime of deexcitation SCell, to make keep synchronous during quick active deexcitation SCell.

The embodiment of the present invention proposes a kind of method safeguarding cell synchronous, comprising: determine to need the deexcitation first of maintain synchronization from community SCell; Obtain and send at a SCell SRS resource visited needed for logical reference signal SRS; According to SRS resource, a SCell sends SRS; Receive the response message corresponding with SRS, wherein response message carries the timing advance TA value of the synchronous adjustment for a SCell.

The embodiment of the present invention proposes a kind of method safeguarding cell synchronous, comprising: determine to need first of the deexcitation of maintain synchronization from community SCell; Before the time alignment timer TAT timer expiry relevant to a SCell or time overtime, the first descending timing difference between a more described SCell and main plot PCell and the first specified threshold, or a described SCell is in not the second descending timing difference in the same time and the second specified threshold, when described first timing difference is less than or equal to described first specified threshold or described second timing difference is less than or equal to described second specified threshold, reset described TAT timer.

The embodiment of the present invention proposes a kind of method safeguarding cell synchronous, comprising: determine to need first of the deexcitation of maintain synchronization from community SCell; Be sent in a SCell and send the SRS resource visited and lead to needed for reference signal SRS; Be received in the SRS that a SCell sends; Send the response message corresponding with SRS, wherein response message carries the timing advance TA value of the synchronous adjustment for a SCell.

The embodiment of the present invention proposes a kind of subscriber equipment safeguarding cell synchronous, and subscriber equipment comprises: determination module, for determining that first of the deexcitation needing maintain synchronization from community SCell; Resource distribution module, sends at a SCell SRS resource visited needed for logical reference signal SRS for obtaining; SRS module, for according to SRS resource, a SCell sends SRS; Receiver module, for receiving the response message corresponding with SRS, wherein response message carries the timing advance TA value of the synchronous adjustment for a SCell.

The embodiment of the present invention proposes a kind of base station equipment safeguarding cell synchronous, and base station equipment comprises:

SCell configuration module, needs first of the deexcitation of maintain synchronization to send from community SCell with for being sent in a SCell SRS resource visited needed for logical reference signal SRS for determining; Receiver module, for being received in the SRS that a SCell sends; Sending module, for sending the response message corresponding with SRS, wherein response message carries the timing advance TA value of the synchronous adjustment for a SCell.

According to the embodiment of the present invention, when can be implemented in many TA, as required synchronous maintenance is carried out to the SCell of deexcitation, when ensure that the SCell that quick active has been deactivated, can realize synchronous.

Accompanying drawing explanation

In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.In the accompanying drawings:

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

Fig. 2 is the flow chart of first embodiment of the invention;

Fig. 3 is the flow chart of second embodiment of the invention;

Fig. 4 is the flow chart of third embodiment of the invention;

Fig. 5 is the flow chart of fourth embodiment of the invention;

Fig. 6 is the flow chart of fifth embodiment of the invention;

Fig. 7 is the flow chart of sixth embodiment of the invention;

Fig. 8 is the structured flowchart of the subscriber equipment of the embodiment of the present invention;

Fig. 9 is the structured flowchart of the base station equipment of the embodiment of the present invention.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.

In order to safeguard that deexcitation SCell's is synchronous, the embodiment of the present invention proposes a kind of method safeguarding cell synchronous, and as shown in Figure 1, the method comprises following process:

110: determine to need the deexcitation of maintain synchronization from community the one SCell;

120: obtain and send at a described SCell SRS resource visited needed for logical reference signal SRS;

130: according to described SRS resource, a described SCell sends SRS;

140: receive the response message corresponding with described SRS, wherein said response message carries the timing advance TA value of the synchronous adjustment for a described SCell.

Further, after receiving the timing advance TA value needing adjustment, reset the TAT timer relevant to a SCell, this TAT timer is used for the timing of a SCell.Safeguard the TAT timer relevant to a SCell, can be the TAT timer of the uplink synchronous directly safeguarding a SCell, also can be the TAT timer of the uplink synchronous of the CellGroup belonging to maintenance the one SCell.

Below in conjunction with several embody rule examples of the embodiment of the present invention be merely given as examples, describe the design of the embodiment of the present invention in detail.

Fig. 2 shows the flow chart of first embodiment of the invention.In the first embodiment of the invention, the deexcitation SCell needing maintain synchronization by evolved base station (evolvedNodeB is called for short " eNB ") pre-configured UE, then utilizes SRS signaling to obtain the TA value regulating described deexcitation SCell synchronous.

Specifically,

The deexcitation SCell of maintaining uplink and/or down-going synchronous is needed at the pre-configured UE of 210, eNB.This process 210 is corresponding with the process 100 shown in Fig. 1.ENB can for UE specifies the information needing the deexcitation SCell of maintain synchronization in RRC reconfiguration message or SCell activation/deactivation message, or indicate the SCell of deexcitation the need of maintain synchronization.Below succinct for describing, " needing the deexcitation SCell of maintain synchronization " is called " SCell ".The SCell that UE receives appointment the one SCell that eNB sends specifies message, and wherein said SCell specifies message to carry the SCell index information being designated as a described Scell.

Specifically, eNB can be respectively UE and configure the deexcitation SCell that needs maintain synchronization in each cell set (CellGroup).Described CellGroup refers to the set that the Cell that can share same uplink timing advance TA value is formed.The message notice UE needing the deexcitation SCell of maintain synchronization that eNB will be determined by dedicated signaling.Alternatively, eNB can specify in message as UE is configured in a resource SCell sending SRS or periodicity SRS aperiodic at this SCell.

As an alternative, eNB can when of deexcitation UE CellGroup, or during last SCell in the CellGroup of deexcitation UE, determines that UE needs the deexcitation SCell of maintaining uplink and/or down-going synchronous, namely a SCell, then notifies UE.

The SRS transmission Indication message that instruction sends SRS on a SCell is received at 220, UE.Specifically, eNB is at time alignment timer (TimeAlignmentTimer corresponding to a SCell, be called for short " TAT timer ") stop forward direction UE transmission PDCCH or media access control MAC CE (MediumAccessControlControlElement, be called for short " MACCE ") signaling, with the SRS indicating UE to send (periodicity or aperiodicity) on a SCell.

This SRS sends Indication message can comprise the SCell index information (index) of a SCell or the CellGroupindex of CellGroup that need to send SRS.Alternatively, this SRS sends Indication message also can not comprise above-mentioned index information, and now all deexcitation SCell send SRS.

Then respond described SRS at 230, UE and send Indication message, according to described SRS resource, a SCell sends SRS.

Then, receive the response message corresponding with this SRS at S240, UE, this response message carries the timing advance TA value of the synchronous adjustment for a SCell.Further, after receiving the timing advance TA value needing adjustment, the TAT timer relevant to a SCell is reset.The described TAT timer relevant to a SCell, can be the TAT timer of the uplink synchronous directly safeguarding a SCell, also can be the TAT timer of the uplink synchronous of the CellGroup belonging to maintenance the one SCell.

Alternatively, in order to save the power consumption of UE, UE can receive from the current SCell keeping the PCell of activation or other maintenances to activate the TA value being used for a SCell.

In addition, if sent after SRS at 230, UE, within the time of presetting (such as within the time that one is greater than TAT timer) or before TAT time-out, do not receive the TA value needing adjustment, then UE is to eNB transmission synchronous maintenance failure status message.

Or, if 230, after UE launches N (N >=1) secondary SRS, such as, after launching 2 SRS, still the TA value needing adjustment is not received, or after transmitting N time, within the time of presetting or still do not receive the TA value needing adjustment before TAT time-out, then UE is to eNB transmission synchronous maintenance failure status message.

According to a first embodiment of the present invention, after a SCell is removed, eNB need to resend SCell and specify message (in order to distinguish, being called " the 2nd SCell specifies message ") to indicate UE to determine a new SCell; Or eNB is while removing a current SCell, send the SCell that the 2nd SCell specifies message to indicate UE new.

Shown in Fig. 2 after 240, the deexcitation SCell of maintain synchronization is needed if described, namely a SCell is activated, or describedly need at least one deexcitation SCell in the CellGroup belonging to deexcitation SCell of maintain synchronization to be activated, then eNB is that the SRS resource of the pre-configured transmission SRS of a SCell can be discharged automatically by UE in 210, or eNB transmits control message to UE, instruction UE discharges pre-configured SRS resource in these cases.Specifically, such as, if need UE to discharge pre-configured SRS resource according to the indication information of eNB, the SCell that then eNB can send to UE in 210 specifies in message and increases control information, pre-configured SRS resource is discharged in these cases to indicate UE, or while other deexcitations SCell in CellGroup belonging to activation the one SCell or a SCell, send Indication message to UE and indicate whether release, or release can be indicated whether by other special signalings.

Fig. 3 is the flow chart of second embodiment of the invention.In second embodiment of the invention, eNB is normally carrying out in the process of TAT maintenance, when needs, such as when a CellGroup of deexcitation UE, or during the SCell that the last maintenance in the CellGroup of deexcitation UE activates, determine that UE needs the deexcitation SCell of maintaining uplink and/or down-going synchronous.Specifically, as shown in Figure 3,

Normal TAT maintenance is carried out at 310, eNB;

320, when determining that one or more deexcitation SCell of UE need maintaining uplink and/or down-going synchronous, such as said circumstances, eNB determines the SCell of the one or more deexcitations needing maintaining uplink and/or down-going synchronous, namely determines a SCell.According to the embodiment of the present invention, eNB or can keep the SCell of activation sends SCell appointment message to UE at current PC ell, the SCell that described SCell specifies message instruction UE to determine at eNB sends SRS, the aperiodicity SRS resource simultaneously required for UE configuration or periodicity SRS resource.According to the embodiment of the present invention, SCell specifies message can carry the index information of the SCell being designated as a SCell, carries SRS resource information and indicates the SRS sending described SRS on a SCell to send indication information.UE, after receiving this SCell and specifying message, will make response.

In second embodiment of the invention, respond described SCell at 330, UE and specify message, send indication information according to described SRS resource information and described SRS, a SCell sends SRS.

ENB, after receiving this SRS, will send response message corresponding with it to UE.In second embodiment of the invention, receive the response message corresponding with this SRS at 340, UE, this response message carries the timing advance TA value of the synchronous adjustment for a SCell.Further, after receiving the timing advance TA value needing adjustment, the TAT timer relevant to a SCell is reset.The described TAT timer relevant to a SCell, can be the TAT timer of the uplink synchronous directly safeguarding a SCell, also can be the TAT timer of the uplink synchronous of the CellGroup belonging to maintenance the one SCell.

Preferably, in order to save the power consumption of UE, UE can keep the SCell activated to receive the TA value being used for a SCell from current PC ell or other.

As the improvement to second embodiment of the invention, can when needs, such as, during the CellGroup of above-mentioned deexcitation UE, or during the SCell that the last maintenance in the CellGroup of deexcitation UE activates, just configuration sends the resource of SRS, and acquiescence just release after sending SRS, namely can single use.Specifically, in 320, the SCell appointment message of appointment the one SCell that eNB sends discharges the resource release indication information of described SRS resource after can carrying and sending described SRS.In this case, UE, after 340 receive the response message corresponding with described SRS, according to resource release indication information, discharges described SRS resource.

In addition, if sent after SRS at 330, UE, within the time of presetting (such as within the time that one is greater than TAT timer) or before TAT time-out, do not receive the TA value needing adjustment, then UE is to eNB transmission synchronous maintenance failure status message.

Or, if 330, after UE launches N (N >=1) secondary SRS, such as, after launching 2 SRS, still the TA value needing adjustment is not received, or after transmitting N time, within the time of presetting or still do not receive the TA value needing adjustment before TAT time-out, then UE is to eNB transmission synchronous maintenance failure status message.

Fig. 4 is the flow chart of third embodiment of the invention.In third embodiment of the invention, by UE as the case may be, such as, when receiving the message of the deexcitation SCell that eNB sends, determine the deexcitation SCell needing maintain synchronization, namely determine a SCell.Specifically be described referring to Fig. 4.

Receive the deexcitation message of the 2nd SCell deexcitation at 410, UE.2nd SCell described here is only for distinguishing with an aforementioned SCell, and object is convenient to describe, to the not special restriction of SCell.UE is after receiving this deexcitation message, judge whether the 2nd SCell is that in its affiliated subdistrict group, last keeps the SCell activated, when described 2nd SCell is the SCell of last maintenance activation in its affiliated subdistrict group, the 2nd SCell is selected to be the aforementioned SCell needing maintain synchronization, an i.e. SCell, or a deexcitation SCell in the 2nd SCell affiliated subdistrict group described in Stochastic choice is a described SCell, or the deexcitation SCell selecting cell index maximum/minimum is a described SCell.Or, UE receives the deexcitation message of a cell set CellGroup deexcitation, and a deexcitation SCell in CellGroup described in Stochastic choice is a described SCell, or index maximum/minimum deexcitation SCell in described Cellgroup small area is selected to be a described SCell.

Because a SCell is determined by UE self, therefore, in order to send SRS, UE needs to the SRS resource needed for eNB request configuration transmission SRS.

In third embodiment of the invention, 420, UE keeps the SCell of activation sending SRS at main plot PCell (keeping activating) or other and sends a request message, wherein said SRS sends a request message the SCell index information carrying and be chosen as a described SCell, to ask to send SRS on a described SCell.

Preferably, before each TAT time-out, after the UE first descending timing difference (or the path-loss difference between a SCell and PCell) that can first calculate between a SCell and PCell is greater than specified threshold, or at a SCell after descending timing difference (or path loss) does not in the same time exceed another certain threshold, just trigger UE to send on a SCell periodically or aperiodic SRS signal, then UE just sends a request message to eNB transmission SRS, otherwise UE resets TAT timer, and do not send a request message to eNB transmission SRS.

Such as, before TAT timer expiry, UE calculates when moment T (1) and T (2) respectively, descending timing difference between one SCell and PCell: T_DL-difference (i)=T_DL-SCell (i)-T_DL-PCell (i), i=1,2;

As (T_DL-difference (1)-T_DL-difference (2))/(T (2)-T (1)) > T_threshold, trigger UE and send on a SCell periodically or aperiodic SRS signal.

Wherein, T_DL-difference (i) represents the difference of the descending timing when moment T (i) between a SCell and PCell.T_DL-SCell (i) represents the descending timing value of a SCell when moment T (i), and T_DL-PCell (i) represents the descending timing value of the PCell when moment T (i), and T_threshold represents triggering thresholding.

The method utilizing path loss values to carry out calculating and descending timing similar,

Such as, before TAT timer expiry, UE calculates when moment T (1) and T (2) respectively, descending timing difference between one SCell and PCell: PL_difference (i)=PL_SCell (i)-PL_PCell (i), i=1,2;

As (PL_difference (1)-PL_difference (2))/(T (2)-T (1)) > PL_threshold, trigger UE and send on a SCell periodically or aperiodic SRS signal.

Wherein, PL_difference (i) represents the difference of the downlink path loss difference when moment T (i) between a SCell and PCell.PL_SCell (i) represents the downlink path loss of a SCell when moment T (i), and PL_PCell (i) represents the downlink path loss of the PCell when moment T (i), and T_threshold represents triggering thresholding.

The method utilizing the descending timing of SCell self and the descending timing in a certain moment before to carry out calculating is as follows:

Such as, before TAT timer expiry, UE calculates when moment T (1) and T (2) respectively, the descending timing difference of a SCell: T_DL-difference=T_DL-SCell (2)-T_DL-SCell (1),

As T_DL-difference > T_threshold, trigger UE and send on a SCell periodically or aperiodic SRS signal.

Wherein, T_DL-difference represents the descending timing difference of a SCell between moment T (1) and T (2).T_DL-SCell (i) represents the descending timing value of a SCell when moment T (i), and T_threshold represents triggering thresholding.

The method utilizing the downlink path loss of SCell self and the downlink path loss in a certain moment before to carry out calculating is as follows:

Such as, before TAT timer expiry, UE calculates when moment T (1) and T (2) respectively, the downlink path loss of a SCell: PL-difference=PL_SCell (2)-PL_SCell (1),

As PL_difference > T_threshold, trigger UE and send on a SCell periodically or aperiodic SRS signal.

Wherein, PL_difference represents the difference of the downlink path loss of a SCell between moment T (1) and T (2).PL-SCell (i) represents the downlink path loss value of a SCell when moment T (i), and T_threshold represents triggering thresholding.

In third embodiment of the invention, receive send response message with the described SRS corresponding SRS that sends a request message at 430, UE, wherein said SRS transmission response message carries the SCell index information of a described SCell and described SRS resource information.Optionally, eNB can, in another dedicated signaling, be also UE transmission SRS resource allocation.

Then, on a described SCell, described SRS is sent at 440, UE.Then, receive the response message corresponding with this SRS at 450, UE, this response message carries the timing advance TA value of the synchronous adjustment for a SCell.Further, after receiving the timing advance TA value needing adjustment, the TAT timer relevant to a SCell is reset.The described TAT timer relevant to a SCell, can be the TAT timer of the uplink synchronous directly safeguarding a SCell, also can be the TAT timer of the uplink synchronous of the CellGroup belonging to maintenance the one SCell.

In addition, if sent after SRS at 440, UE, within the time of presetting (such as within the time that one is greater than TAT timer) or before TAT time-out, do not receive the TA value needing adjustment, then UE is to eNB transmission synchronous maintenance failure status message.

Or, if 440, after UE launches N (N >=1) secondary SRS, such as, after launching 2 SRS, still the TA value needing adjustment is not received, or after transmitting N time, within the time of presetting or still do not receive the TA value needing adjustment before TAT time-out, then UE is to eNB transmission synchronous maintenance failure status message.

According to a first embodiment of the present invention, after a SCell is removed, UE will reselect the SCell needing maintain synchronization by the mode described in 410, namely determines a SCell.

Fig. 5 is the flow chart of fourth embodiment of the invention.In fourth embodiment of the invention, the CellGroup synchronous maintenance Indication message that UE sends according to the eNB received, confirm that this CellGroup needs maintain synchronization to eNB, but and the uncertain SCell needing maintain synchronization specifically, an i.e. uncertain SCell, but determine a SCell by eNB.

Specifically, receive cell set CellGroup synchronous maintenance Indication message at 510, UE, when this message all SCell be used to indicate in this CellGroup are all deactivated, described CellGroup is the need of maintain synchronization for composition graphs 5; Or this Indication message is used to indicate when the SCell of the TAT timer relevant to this CellGroup whether in described Cellgroup is all deactivated the need of maintenance.

When described CellGroup needs maintain synchronization, on current PC ell or other SCell activated, send SRS at 520, UE and send a request message, this message carries the index of the cell set CellGroup needing maintain synchronization.UE to before the relevant TAT timer expiry of this CellGroup, can send this SRS to eNB and sends a request message.

Then, receive at 530, UE and send response message with the described SRS corresponding SRS that sends a request message, wherein said SRS transmission response message carries the index information of the SCell needing maintain synchronization, i.e. the SCell index information of a described SCell.Alternatively, described SRS sends response message and can carry the resource sent needed for SRS simultaneously.As an alternative, eNB can be also that UE sends SRS resource allocation by another dedicated signaling.

Next, be similar to the embodiment of the present invention three, on a described SCell, send described SRS at 540, UE.Then, receive the response message corresponding with this SRS at 550, UE, this response message carries the timing advance TA value of the synchronous adjustment for a SCell.Further, after receiving the timing advance TA value needing adjustment, the TAT timer relevant to a SCell is reset.The described TAT timer relevant to a SCell, can be the TAT timer of the uplink synchronous directly safeguarding a SCell, also can be the TAT timer of the uplink synchronous of the CellGroup belonging to maintenance the one SCell.

In addition, if sent after SRS at 540, UE, within the time of presetting (such as within the time that one is greater than TAT timer) or before TAT time-out, do not receive the TA value needing adjustment, then UE is to eNB transmission synchronous maintenance failure status message.

Or, if 540, after UE launches N (N >=1) secondary SRS, such as, after launching 2 SRS, still the TA value needing adjustment is not received, or after transmitting N time, within the time of presetting or still do not receive the TA value needing adjustment before TAT time-out, then UE is to eNB transmission synchronous maintenance failure status message.

Fig. 6 is the flow chart of fifth embodiment of the invention.In fifth embodiment of the invention, the deexcitation SCell needing maintain synchronization is determined by UE, an i.e. SCell, and in order to reduction procedure, eNB is when deexcitation SCell, just for UE configures the resource for sending SRS at this SCell, so, UE does not need independent to the resource needed for eNB request configuration transmission SRS.

Specifically describe below in conjunction with Fig. 6, receive the deexcitation message of the 2nd SCell deexcitation at 610, UE.UE is after receiving this deexcitation message, judge whether the 2nd SCell is that in its affiliated subdistrict group, last keeps the SCell activated, when described 2nd SCell is the SCell of last maintenance activation in its affiliated subdistrict group, the 2nd SCell is selected to be the aforementioned SCell needing maintain synchronization, an i.e. SCell, or a deexcitation SCell in the 2nd SCell affiliated subdistrict group described in Stochastic choice is a described SCell, or the deexcitation SCell selecting cell index maximum/minimum is a described SCell.Or, UE receives the deexcitation message of a cell set CellGroup deexcitation, and a deexcitation SCell in CellGroup described in Stochastic choice is a described SCell, or index maximum/minimum deexcitation SCell in described Cellgroup small area is selected to be a described SCell.Alternatively, described deexcitation message is carried at the resource information of transmission needed for SRS on described 2nd SCell.And alternatively, eNB can by special signaling for UE is configured in described 2nd SCell sending the resource information needed for SRS.

According to a fifth embodiment of the present invention, on a SCell, SRS is sent at 620, UE.Alternatively, before each TAT time-out, after the UE first descending timing difference (or path-loss difference) that can first calculate between a SCell and PCell is greater than specified threshold, or a SCell is not after the second descending timing difference (or path loss) in the same time exceedes another certain threshold, just trigger UE to send on a SCell periodically or aperiodic SRS signal, otherwise UE resets TAT timer, and do not send SRS to eNB.

Then, receive the response message corresponding with this SRS at 630, UE, this response message carries the timing advance TA value of the synchronous adjustment for a SCell.Further, after receiving the timing advance TA value needing adjustment, the TAT timer relevant to a SCell is reset.The described TAT timer relevant to a SCell, can be the TAT timer of the uplink synchronous directly safeguarding a SCell, also can be the TAT timer of the uplink synchronous of the CellGroup belonging to maintenance the one SCell.

In addition, if sent after SRS at 620, UE, within the time of presetting (such as within the time that one is greater than TAT timer) or before TAT time-out, do not receive the TA value needing adjustment, then UE is to eNB transmission synchronous maintenance failure status message.

Or, if 620, after UE launches N (N >=1) secondary SRS, such as, after launching 2 SRS, still the TA value needing adjustment is not received, or after transmitting N time, within the time of presetting or still do not receive the TA value needing adjustment before TAT time-out, then UE is to eNB transmission synchronous maintenance failure status message.

Fig. 7 is the flow chart of sixth embodiment of the invention.In sixth embodiment of the invention, be with the difference of the aforementioned first to the 5th embodiment, UE is when receiving eNB and being sent to SCell deexcitation message, the TAT timer of the cell set CellGroup determined belonging to this SCell according to certain condition needs to safeguard, when needing the TAT timer expiry safeguarded, then UE removes the SCell of this deexcitation, or request eNB allows the SCell removing this deexcitation.After eNB receives the request of UE, UE can be indicated to remove the SCell of this deexcitation, UE also can be indicated on the SCell of this deexcitation to carry out uplink synchronous process, such as, adopt the method for second embodiment of the invention to carry out synchronous maintenance.

Below in conjunction with Fig. 7 specifically, receive at 710, UE the 2nd SCell deexcitation message that eNB sends, and determine whether the TAT timer that needs maintenance the 2nd SCell corresponding at 720, UE.Specifically, if UE determines the SCell that the maintenance existed and the 2nd SCell belongs to same CellGroup activates, then UE does not safeguard the timer that the 2nd SCell is corresponding, otherwise UE needs TAT timer that maintenance the 2nd SCell is corresponding or TAT timer corresponding to the CellGroup belonging to the 2nd SCell.The TAT timer that so-called 2nd SCell is corresponding, represents relevant to the 2nd SCell, and determine whether that the 2nd SCell keeps the timer of uplink synchronous, here, each SCell can have a corresponding TAT timer respectively.The TAT timer that so-called CellGroup belonging to 2nd SCell is corresponding, represent relevant to the CellGroup belonging to the 2nd SCell, whether the SCell determining in this Cellgroup keeps the timer of uplink synchronous, here, all SCell in CellGroup safeguard a TAT timer jointly.

Alternatively, the TAT timer that needs TAT timer corresponding to maintenance the 2nd SCell or determine whether according to the instruction of eNB to need the CellGroup belonging to maintenance the 2nd SCell corresponding can be determined whether according to the instruction of eNB, therefore indicate in the SCell deexcitation message that eNB can send in 710 and safeguard the need of UE the TAT timer that CellGroup belonging to the TAT timer that the 2nd SCell is corresponding or the 2nd SCell is corresponding, or indicated separately by other special signalings in addition.

Alternatively, UE can be corresponding at the CellGroup belonging to TAT corresponding to the 2nd SCell or the 2nd SCell each time-out of TAT timer before or overtime time, when the first descending timing difference determining between the 2nd SCell and PCell is less than a specified threshold, or UE determines that the 2nd SCell is not when the second descending timing difference (or path loss) is in the same time no more than another certain threshold, UE resets TAT timer, and does not safeguard.

According to a sixth embodiment of the present invention, 730, when the TAT timer that the CellGroup belonging to the TAT timer needing to safeguard that described 2nd SCell is corresponding or the 2nd SCell is corresponding, and during described TAT timer expiry, UE sends the indication information of TAT timer expiry corresponding to described 2nd SCell to eNB.Alternatively, UE can remove described 2nd SCell automatically.

Then, 740, the SCell that UE reception eNB sends removes Indication message, described 2nd SCell removes by instruction UE, or UE receives the SCell synchronous maintenance Indication message that eNB sends, instruction UE carries out synchronous maintenance on the 2nd SCell, such as, adopt the method for second embodiment of the invention to carry out synchronous maintenance.

According to the embodiment of the present invention, when can be implemented in many TA, as required to the synchronous maintenance that the SCell of deexcitation carries out, when ensure that the SCell that quick active has been deactivated, can realize synchronous.

As shown in Figure 8, the embodiment of the present invention also proposed a kind of subscriber equipment 800 safeguarding cell synchronous.Fig. 8 is the structured flowchart of subscriber equipment 800.Specifically, subscriber equipment 800 comprises: determination module 810, and for determining that first of the deexcitation needing maintain synchronization from community SCell, it can be processor; Resource distribution module 820, send at a described SCell SRS resource visited needed for logical reference signal SRS for obtaining, it can be realized by another processor; SRS module 830, for according to described SRS resource, a described SCell sends SRS, and it can be a controlling equipment; Receiver module 840, for receiving the response message corresponding with described SRS, wherein said response message carries the timing advance TA value of the synchronous adjustment for a described SCell, and it can be an interface.

According to the embodiment of the present invention, determination module 810 sends described SRS on SCell SRS for receiving instruction sends Indication message; SRS module 830 responds described SRS and sends Indication message, according to described SRS resource, a described SCell sends SRS.

According to the embodiment of the present invention, determination module 810 specifies message for the SCell receiving appointment the one SCell, and wherein SCell specifies message to carry the SCell index information of a Scell, and SCell specifies message to carry SRS resource information; Resource distribution module 820 is specified message from the SCell that determination module 810 obtains and is obtained SRS resource.SRS module 830 receives the SRS transmission Indication message that instruction sends SRS on a SCell, and responds SRS transmission Indication message, according to SRS resource, a SCell sends SRS.

According to the embodiment of the present invention, the SCell of appointment the one SCell that determination module 810 receives specifies message also to carry when at least one SCell is activated in the CellGroup of instruction when a SCell is activated or belonging to a SCell, the control information of release SRS resource, when a SCell is activated, resource distribution module 820 is according to the control information release SRS resource of release SRS resource, and wherein CellGroup refers to the Cell set of the Cell composition can sharing same timing advance TA value.

According to the embodiment of the present invention, determination module 810 specifies message for the SCell receiving appointment the one SCell, wherein SCell specifies message to carry the SCell index information of a Scell, and SCell specifies message to carry SRS resource information, indicate the SRS sending SRS on a SCell to send indication information and discharge the resource release indication information of SRS resource after sending SRS; SRS module 830 specifies message for responding SCell, sends indication information, a SCell sends SRS according to SRS resource information and SRS; Receiver module 840 is for receiving the response message corresponding with SRS, and wherein response message carries the timing advance TA value of the synchronous adjustment for a SCell; Resource distribution module 820, according to resource release indication information, discharges SRS resource.

According to the embodiment of the present invention, determination module 810 is for receiving the deexcitation message of the 2nd SCell deexcitation, and judge whether the 2nd SCell is that in its affiliated subdistrict group, last keeps the SCell activated, when the 2nd SCell is the SCell of last maintenance activation in its affiliated subdistrict group, determination module 810 selects described 2nd SCell to be a SCell, or a deexcitation SCell in the group of Stochastic choice the 2nd SCell affiliated subdistrict is a SCell, or the deexcitation SCell selecting cell index maximum or minimum is a SCell; Or determination module 810 receives the deexcitation message of a cell set CellGroup deexcitation, a deexcitation SCell in Stochastic choice CellGroup is a SCell, or the deexcitation SCell selecting Cellgroup small area index maximum/minimum is a SCell; 820 resource distribution modules send a request message for keeping that at main plot PCell or other SCell activated sends SRS, wherein SRS sends a request message the SCell index information carrying and be chosen as a SCell, on a SCell, SRS is sent with request, and resource distribution module 820 sends response message for receiving the corresponding SRS that to send a request message with SRS, and wherein SRS sends SCell index information and the SRS resource information that response message carries a SCell.

According to the embodiment of the present invention, resource distribution module 820 for comparing the first descending timing difference between a SCell and PCell and the first specified threshold, or compares a SCell in not the second descending timing difference in the same time and the second specified threshold.When the first timing difference is greater than the first specified threshold or the second timing difference is greater than the second specified threshold, at main plot PCell or other, resource distribution module 820 keeps that the SCell of activation sends SRS and sends a request message.

According to the embodiment of the present invention, determination module 810 is for receiving the deexcitation message of the 2nd SCell deexcitation, deexcitation message is carried at the resource information of transmission needed for SRS on the 2nd SCell, determination module 810 is for judging whether the 2nd SCell is that in its affiliated subdistrict group, last keeps the SCell activated, when the 2nd SCell is the SCell of last maintenance activation in its affiliated subdistrict group, determination module selects the 2nd SCell to be a SCell, or a deexcitation SCell in the group of Stochastic choice the 2nd SCell affiliated subdistrict is a SCell, or the deexcitation SCell selecting cell index maximum/minimum is a SCell, resource distribution module 820 obtains SRS resource in the deexcitation message that receives from determination module 810.

According to the embodiment of the present invention, receiver module 840 receives described response message for keeping activating on SCell at main plot PCell or other.

As shown in Figure 9, the embodiment of the present invention also proposed a kind of base station equipment 900 safeguarding cell synchronous.Fig. 9 is the structured flowchart of base station equipment 900, specifically, base station equipment 900 comprises: SCell configuration module 910, need the deexcitation of maintain synchronization to send from community the one SCell with for being sent in a described SCell SRS resource visited needed for logical reference signal SRS for determining, it can be a processor; Receiver module 920, for receiving according to described SRS resource, the SRS that a described SCell sends, it can be a controlling equipment; Sending module 930, for sending the response message corresponding with described SRS, wherein said response message carries the timing advance TA value of the synchronous adjustment for a described SCell, and it can be an interface.

According to the embodiment of the present invention, SCell configuration module 910 sends described SRS on SCell SRS for sending instruction sends Indication message; Described receiver module 920 for receive according to described SRS resource, the SRS that a described SCell sends.

According to the embodiment of the present invention, SCell configuration module 910 specifies message for the SCell sending appointment the one SCell, and wherein SCell specifies message to carry the SCell index information being designated as a Scell, and SCell specifies message to carry SRS resource information.SCell configuration module 910 also sends SRS on SCell SRS for sending instruction sends Indication message, and receiver module 920 sends Indication message for responding SRS, receives according to SRS resource, the SRS that a SCell sends.

According to the embodiment of the present invention, when the SCell of appointment the one SCell that SCell configuration module 910 sends specifies message at least one SCell also carried in the CellGroup of instruction when a SCell is activated or belonging to a SCell to be activated, the control information of release SRS resource.

According to the embodiment of the present invention, the SCell that SCell configuration module 910 sends appointment the one SCell specifies message, wherein SCell specifies message to carry the SCell index information of a Scell, and SCell specifies message to carry SRS resource information, indicate the SRS sending SRS on a SCell to send indication information and discharge the resource release indication information of SRS resource after sending SRS; Receiver module 920 receives response SCell and specifies message, sends indication information, the SRS that a SCell sends according to SRS resource information and SRS; Sending module 930 sends the response message corresponding with SRS, and wherein corresponding message carries the timing advance TA value of the synchronous adjustment for a SCell.

According to the embodiment of the present invention, SCell configuration module 910 is also for sending the deexcitation message of the 2nd SCell deexcitation, and receive the response message corresponding with deexcitation message, wherein response message carries the SCell index information of a SCell, SCell configuration module 910 also sends a request message for keeping that at main plot PCell or other SCell activated receives SRS, wherein SRS sends a request message the SCell index information carrying and be designated as a SCell, then SCell configuration module 910 sends and the SRS corresponding SRS that sends a request message sends response message, wherein SRS sends SCell index information and the SRS resource information that response message carries a SCell.

According to the embodiment of the present invention, SCell configuration module 910 is for sending the deexcitation message of the 2nd SCell deexcitation, wherein deexcitation message is carried at the resource information of transmission needed for SRS on the 2nd SCell, and SCell configuration module 910 is also for receiving the response message corresponding with deexcitation message, and wherein response message carries the SCell index information being designated as a SCell.

The method described in the embodiment of the present invention can be realized smoothly according to the base station equipment of the embodiment of the present invention and subscriber equipment, ensure when many TA, safeguard that the SCell's of deexcitation is synchronous as required, to ensure the quick active of SCell.

The function that in base station equipment described in the present embodiment and subscriber equipment, functions unit performs in detail can see embodiment of the method before.This base station equipment can be the evolution base station eNodeB in LTE system; Described subscriber equipment includes but not limited to each Terminal Type, as mobile phone, panel computer or kneetop computer etc.

Those of ordinary skill in the art can recognize, in conjunction with unit and the algorithm steps of each example of embodiment disclosed herein description, can realize with electronic hardware, computer software or the combination of the two, in order to the interchangeability of hardware and software is clearly described, generally describe composition and the step of each example in the above description according to function.These functions perform with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can use distinct methods to realize described function to each specifically should being used for, but this realization should not thought and exceeds scope of the present invention.

The software module that the method described in conjunction with embodiment disclosed herein or the step of algorithm can use hardware, processor to perform, or the combination of the two is implemented.Software module can be placed in the storage medium of other form any known in random asccess memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field.

Although illustrate and describe some embodiments of the present invention, it will be understood by those skilled in the art that without departing from the principles and spirit of the present invention, can carry out various amendment to these embodiments, such amendment should fall within the scope of the present invention.

Claims

1. safeguard a method for cell synchronous, it is characterized in that, comprising:

Determine that first of the deexcitation needing maintain synchronization from community SCell;

Obtain and send at a described SCell SRS resource visited needed for logical reference signal SRS;

According to described SRS resource, a described SCell sends SRS;

Receive the response message corresponding with described SRS, wherein said response message carries the timing advance TA value of the synchronous adjustment for a described SCell.

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

Receive the SRS transmission Indication message that instruction sends described SRS on a described SCell;

Described according to described SRS resource, a described SCell sends SRS, comprising:

Respond described SRS and send Indication message, according to described SRS resource, a described SCell sends SRS.

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

Described reception indicates the SRS sending described SRS on a described SCell to send Indication message, comprising:

Receive described SRS from main plot or other communities activated and send Indication message, described SRS sends the index information that Indication message comprises the index information of a SCell or the CellGroup belonging to a SCell.

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

Describedly determine that first of the deexcitation needing maintain synchronization from community SCell, comprising:

Receive and specify the SCell of a described SCell to specify message, wherein said SCell specifies message to carry the SCell index information of a described Scell;

Described acquisition sends the SRS resource visited needed for logical reference signal SRS at a described SCell, comprising:

Specify message from described SCell and obtain described SRS resource information.

5. method as claimed in claim 4, it is characterized in that, described SCell specifies message also to carry when at least one SCell is activated in the CellGroup of instruction when a described SCell is activated or belonging to a described SCell, discharges the control information of described SRS resource;

Described method comprises further:

When a described SCell is activated, discharge described SRS resource;

Wherein CellGroup refers to the Cell set of the Cell composition can sharing same timing advance TA value.

6. method as claimed in claim 4, is characterized in that, described SCell specifies message also to carry and indicates the SRS transmission indication information sending described SRS on a described SCell.

7. method as claimed in claim 6, is characterized in that, described SCell appointment message discharges the resource release indication information of described SRS resource after also carrying and sending described SRS;

Described method comprises further:

According to described resource release indication information, discharge described SRS resource.

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

The described SCell determining the deexcitation needing maintain synchronization, comprising:

Receive the deexcitation message of the 2nd SCell deexcitation, described 2nd SCell is selected to be a described SCell, or a deexcitation SCell in the 2nd SCell affiliated subdistrict group described in Stochastic choice is a described SCell, or the SCell of the maximum or minimum deexcitation of described cell set small area index is selected to be a described SCell;

Or, receive the deexcitation message of described 2nd SCell deexcitation, judge whether described 2nd SCell is that in its affiliated subdistrict group, last keeps the SCell activated, when described 2nd SCell is the SCell of last maintenance activation in its affiliated subdistrict group, described 2nd SCell is selected to be a described SCell, or the SCell of a deexcitation in the 2nd SCell affiliated subdistrict group described in Stochastic choice is a described SCell, or index maximum or minimum deexcitation SCell in described cell set small area is selected to be a described SCell;

Or, receive after the deexcitation message of described cell set CellGroup deexcitation, a deexcitation SCell in deexcitation CellGroup described in Stochastic choice is a described SCell, or selects index maximum or minimum deexcitation SCell in described deexcitation Cellgroup small area to be a described SCell;

Or, receive cell set synchronous maintenance Indication message, when this cell set synchronous maintenance Indication message whole SCell be used to indicate in described cell set are all deactivated, described cell set, the need of maintain synchronization, comprises a described SCell in described cell set.

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

Keep at main plot PCell or other SCell that activates sends SRS and sends a request message, wherein said SRS sends a request message the SCell index information carrying and be chosen as a described SCell, to ask to send SRS on a described SCell;

Receive and send response message with the described SRS corresponding SRS that sends a request message, wherein said SRS transmission response message carries described SRS resource information.

10. method as claimed in claim 9, is characterized in that,

The described SCell keeping activating at main plot PCell or other sends SRS send a request message, comprising:

The first descending timing difference between a more described SCell and described PCell and the first specified threshold, or a more described SCell is in not the second descending timing difference in the same time and the second specified threshold,

When described first descending timing difference is greater than described first specified threshold or described second descending timing difference is greater than described second specified threshold, keeps that the SCell of activation sends SRS at described main plot PCell or described other and send a request message.

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

When described first descending timing difference is greater than described first specified threshold or described second descending timing difference is greater than described second specified threshold, according to described SRS resource, a described SCell sends SRS.

12. methods as described in any one of claim 1 to 11, is characterized in that,

The response message that described reception is corresponding with described SRS, comprising:

Keep activating on SCell at main plot PCell or other and receive described response message.

13. methods as described in any one of claim 1 to 11, it is characterized in that, described method comprises further:

If send SRS on a described SCell after, within the time of presetting or do not receive the response message corresponding with described SRS before time alignment timer TAT time-out, then send synchronous maintenance failure status message; Or

If do not receive the response message corresponding with described SRS send the number of times that SRS presets on a described SCell after, or after have sent the number of times that SRS presets, within the time of presetting, do not receive the response message corresponding with described SRS, or after have sent the number of times that SRS presets, before TAT timer expiry, do not receive the response message corresponding with described SRS, then send synchronous maintenance failure status message.

14. methods as claimed in claim 11, it is characterized in that, described method also comprises:

Before the time alignment timer TAT timer expiry relevant to a SCell or time overtime, the first descending timing difference between a more described SCell and main plot PCell and the first specified threshold, or a described SCell is in not the second descending timing difference in the same time and the second specified threshold

When described first descending timing difference is not more than described first specified threshold or described second descending timing difference is not more than described second specified threshold, reset described TAT timer.

15. 1 kinds of methods safeguarding cell synchronous, is characterized in that, comprising:

Be sent in a described SCell and send the SRS resource visited and lead to needed for reference signal SRS;

Be received in the SRS that a described SCell sends;

Send the response message corresponding with described SRS, wherein said response message carries the timing advance TA value of the synchronous adjustment for a described SCell.

16. methods as claimed in claim 15, is characterized in that, also comprise

Send instruction sends described SRS SRS transmission Indication message at a described SCell from main plot or other communities activated, described SRS sends the index information that Indication message comprises the index information of a SCell or the CellGroup belonging to a SCell.

17. methods as claimed in claim 15, is characterized in that, also comprise:

Send and specify the SCell of a described SCell to specify message, wherein said SCell specifies message to carry the SCell index information of a described SCell and described SRS resource information.

18. methods as claimed in claim 17, it is characterized in that, when described SCell specifies message at least one SCell also carried in the CellGroup of instruction when a described SCell is activated or belonging to a described SCell to be activated, discharge the control information of described SRS resource.

19. methods as claimed in claim 17, is characterized in that,

Described SCell specifies message also to carry and indicates the SRS transmission indication information sending described SRS on a described SCell.

20. methods as claimed in claim 17, is characterized in that,

Described SCell appointment message discharges the resource release indication information of described SRS resource after also carrying and sending described SRS.

21. methods as claimed in claim 16, is characterized in that,

Selection will the 2nd SCell of deexcitation be a described SCell, or the SCell of a deexcitation in the 2nd SCell affiliated subdistrict group described in Stochastic choice is a described SCell, or index maximum or minimum deexcitation SCell in described cell set small area is selected to be a described SCell.

22. methods as claimed in claim 16, it is characterized in that, described method also comprises:

Send cell set synchronous maintenance Indication message, when this cell set synchronous maintenance Indication message whole SCell be used to indicate in described cell set are all deactivated, described cell set, the need of maintain synchronization, comprises a described SCell in described cell set.

23. methods as claimed in claim 16, is characterized in that,

Describedly be sent in a described SCell and send SRS resource needed for SRS, comprising:

Keep at main plot PCell or other SCell that activates receives SRS and sends a request message, wherein said SRS sends a request message the SCell index information carrying and be chosen as a described SCell;

Send and send response message with the described SRS corresponding SRS that sends a request message, wherein said SRS transmission response message carries described SRS resource information.

24. methods as described in any one of claim 16 to 23, is characterized in that,

The response message that described transmission is corresponding with described SRS, comprising:

Keep activating on SCell at main plot PCell or other and send described response message.

25. 1 kinds of user equipment (UE)s safeguarding cell synchronous, it is characterized in that, described subscriber equipment comprises:

Determination module, for determining that first of the deexcitation needing maintain synchronization from community SCell;

Resource distribution module, sends at a described SCell SRS resource visited needed for logical reference signal SRS message SRS for obtaining;

SRS module, for according to described SRS resource, a described SCell sends SRS;

Receiver module, for receiving the response message corresponding with described SRS, wherein said response message carries the timing advance TA value of the synchronous adjustment for a described SCell.

26. subscriber equipmenies as claimed in claim 25, is characterized in that,

Described determination module also specifies message for receiving the SCell specifying a described SCell, and wherein said SCell specifies message to carry the SCell index information of a described Scell, and described SCell specifies message to carry described SRS resource information,

Described resource distribution module is specified message from the described SCell that described determination module obtains and is obtained described SRS resource.

27. subscriber equipmenies as claimed in claim 26, it is characterized in that, the SCell of the described SCell of appointment that described determination module receives specifies message also to carry when at least one SCell is activated in the CellGroup of instruction when a described SCell is activated or belonging to a described SCell, discharge the control information of described SRS resource, when a described SCell is activated, described resource distribution module discharges described SRS resource according to the described control information of the described SRS resource of release, wherein CellGroup refers to the Cell set of the Cell composition can sharing same timing advance TA value.

28. subscriber equipmenies as claimed in claim 25, is characterized in that,

Described determination module specifies message for receiving the SCell specifying a described SCell, wherein said SCell specifies message to carry the SCell index information of a described Scell, and described SCell specifies message to carry described SRS resource information, indicate the SRS sending described SRS on a described SCell to send indication information and discharge the resource release indication information of described SRS resource after sending described SRS

Described SRS module specifies message for responding described SCell, sends indication information, a described SCell sends SRS according to described SRS resource information and described SRS;

Described receiver module is for receiving the response message corresponding with described SRS, and wherein said response message carries the timing advance TA value of the synchronous adjustment for a described SCell;

Described resource distribution module, according to described resource release indication information, discharges described SRS resource.

29. subscriber equipmenies according to any one of claim 25 to 28, is characterized in that,

Described determination module is also for receiving the deexcitation message of the 2nd SCell deexcitation, and judge whether described 2nd SCell is that in its affiliated subdistrict group, last keeps the SCell activated, when described 2nd SCell is the SCell of last maintenance activation in its affiliated subdistrict group, described determination module selects described 2nd SCell to be a described SCell, or a deexcitation SCell in the 2nd SCell affiliated subdistrict group described in Stochastic choice is a described SCell, or the deexcitation SCell selecting cell index maximum or minimum is a described SCell;

Or receive the deexcitation message of a cell set CellGroup deexcitation, a deexcitation SCell in CellGroup described in Stochastic choice is a described SCell, or selects index maximum or minimum deexcitation SCell in described Cellgroup small area to be a described SCell;

Described resource distribution module sends a request message for keeping that at main plot PCell or other SCell activated sends SRS, wherein said SRS sends a request message the SCell index information carrying and be chosen as a described SCell, on a described SCell, SRS is sent with request, and described resource distribution module sends response message for receiving the corresponding SRS that to send a request message with described SRS, and wherein said SRS sends response message and carries the SCell index information of a described SCell and described SRS resource information.

30. subscriber equipmenies according to any one of claim 25 to 28, is characterized in that,

Described determination module is also for receiving the deexcitation message of the 2nd SCell deexcitation, described deexcitation message is carried at the resource information of transmission needed for SRS on described 2nd SCell, described determination module is for judging whether described 2nd SCell is that in its affiliated subdistrict group, last keeps the SCell activated, when described 2nd SCell is the SCell of last maintenance activation in its affiliated subdistrict group, described determination module selects described 2nd SCell to be a described SCell, or a deexcitation SCell in the 2nd SCell affiliated subdistrict group described in Stochastic choice is a described SCell, or the deexcitation SCell selecting cell index maximum or minimum is a described SCell,

Described resource distribution module is used for obtaining described SRS resource from the described deexcitation message that described determination module receives.

31. 1 kinds of base station equipments safeguarding cell synchronous, it is characterized in that, described base station equipment comprises:

SCell configuration module, needs first of the deexcitation of maintain synchronization to send from community SCell with for being sent in a described SCell SRS resource visited needed for logical reference signal SRS for determining;

Receiver module, for being received in the SRS that a described SCell sends;

Sending module, for sending the response message corresponding with described SRS, wherein said response message carries the timing advance TA value of the synchronous adjustment for a described SCell.

32. base station equipments as claimed in claim 31, is characterized in that,

Described SCell configuration module also specifies message for sending the SCell specifying a described SCell, and wherein said SCell specifies message to carry the SCell index information of a described Scell and described SRS resource information.

33. base station equipments as described in claim 31 or 32, it is characterized in that, when the SCell of the described SCell of appointment that described SCell configuration module sends specifies message at least one SCell also carried in the CellGroup of instruction when a described SCell is activated or belonging to a described SCell to be activated, discharge the control information of described SRS resource.