CN103582113A

CN103582113A - Discontinuous reception maintaining method and equipment

Info

Publication number: CN103582113A
Application number: CN201210285764.0A
Authority: CN
Inventors: 赵亚利
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2012-08-10
Filing date: 2012-08-10
Publication date: 2014-02-12
Anticipated expiration: 2032-08-10
Also published as: CN103582113B

Abstract

The invention discloses a discontinuous reception (DRX) maintaining method and equipment and relates to the field of wireless communication. The problem of how DRX maintaining is carried out when a terminal concentrates resources of a plurality of base stations at the same time is solved. The terminal which concentrates the resources of the base stations receives a DRX configuration parameter issued by one of the base stations, one base station is selected from the base stations to be used as a synchronization reference base station, and according to the DRX configuration parameter and the SFN and the sub frame number of the synchronization reference base station, DRX maintaining is carried out. The discontinuous reception (DRX) maintaining method and equipment can be used for solving the problem of how DRX maintaining is carried out when the terminal concentrates resources of the base stations at the same time.

Description

Discontinuous reception maintaining method and equipment

Technical field

The present invention relates to wireless communication field, relate in particular to a kind of discontinuous reception maintaining method and equipment.

Background technology

In the mobile communication system based on shared channel, Long Term Evolution (Long Term Evolution for example, LTE) in system, the transmission of up-downgoing data is responsible for control by base station (eNB) scheduler, when scheduler is determined certain user of scheduling, will in which kind of resource, send or receive by control channel notification terminal data.Terminal (UE) monitoring control channel, when the schedule information that comprises oneself being detected, completes the transmission (up) of data or receives (descending) according to the indication on control channel.Therefore under state of activation, due to terminal, when uncertain eNB dispatches it, and a kind of common mode of operation is, the continuous monitoring control channel of terminal, and the subframe that each is comprised to its descending scheduling control channel is resolved, and is scheduled judging whether.This working method is large in terminal data amount, can obtain higher efficiency may frequently be dispatched in the situation that.Yet for some business, the arrival rate of data is lower, and the number of times that causes terminal to be scheduled is also less, if terminal continuous monitoring control channel still can increase its power consumption undoubtedly.In order to solve power consumption problem, LTE system has adopted discontinuous reception (Discontinuous Reception, DRX) mode of operation, under this mode of operation, and terminal periodic control channel is monitored, thereby reach the object of economize on electricity.

The basic principle of DRX as shown in Figure 1.Wherein continue the time period that listening period section (On duration) represents UE monitoring control channel, open radio-frequency channel therebetween, and continuous monitoring control channel; Remove outside On duration At All Other Times, UE is in sleep (Sleep) state, and its radio frequency link will be closed, and monitoring control channel no longer, to reach the object of power saving.Periodically there is (Cycle) in On Duration, the concrete cycle is by eNB Configuration.

The DRX mechanism of LTE has been considered the arrival mode of data service, i.e. the arrival of packet is (can be understood as, once there be packet to arrive, can arrive continuously more grouping within a short period of time so) of burst.In order to adapt to this business, arrive feature, LTE DRX process has adopted multiple timer, and combines with mixed automatic retransfer request (Hybrid Automatic Repeat reQuest, HARQ) process, to reaching better electricity saving performance.

The relevant timer of DRX comprises:

Continue to monitor timer (onDurationTimer): according to this timer UE monitoring control channel of periodically waking up, as shown in Figure 1.

Short DRX cycle timer (Short DRX cycle Timer): for the feature that better coordinates data service to arrive, LTE system allows two kinds of DRX cycle of configuration: long period (long cycle) and short period (short cycle).The on duration of two kinds of cycle is identical, but the time of sleep is different.In short cycle, the sleep time is relatively shorter, UE can be quickly monitoring control channel again.Long cycle must configure, and is the initial condition of DRX process; Short cycle is optional.Short DRX cycle timer is provided with the lasting time of short cycle that adopts.After Short cycle timer is overtime, UE will be used Long cycle.

Discontinuous monitoring deexcitation timer (drx-InactivityTimer): configured after DRX, when receiving the control signal of HARQ initial transmission, opens UE (Active Time) within the time of permission monitoring control channel this timer, before this timer expiry, the continuous monitoring control channel of UE.If before drx-InactivityTimer is overtime, UE receives the control signal of HARQ initial transmission, by termination and restart drx-InactivityTimer.

Timer two-way time (HARQ RTT Timer): be only applicable to down link (DL), make likely monitoring control channel not before retransmit arriving next time of UE, reach better power savings.If UE has received the control signal of HARQ transmission (initial transmission or re-transmission), will open this timer.If the decoding after front HARQ transmission of the data in corresponding HARQ instance process unsuccessful (being the negative response (NACK) of UE feedback), after HARQ RTT Timer is overtime, UE opens retransmission timer (drx-RetransmissionTimer).If the data in corresponding HARQ instance process are successfully decoded (being the affirmative acknowledgement (ACK) of UE feedback) after front HARQ transmission, after HARQ RTT Timer timer expiry, UE does not start drx-RetransmissionTimer.If current, only have HARQ RTT Timer operation, UE is monitoring control channel not.

Discontinuous monitoring retransmission timer (drx-RetransmissionTimer): be only applicable to DL.At drx-RetransmissionTimer therebetween, UE monitors control signal, waits for the retransfer scheduling of corresponding HARQ instance process.

By said process, can find out, in onDurationTimer, drx-RetransmissionTimer and drx-InactivityTimer, have any one timer to move, UE is by monitoring control channel.

The time of UE monitoring control channel is called again activationary time (Active Time).In LTE system, Active Time also has other factors to affect except being subject to the impact of DRX timer, LTE version 8(Rel-8) in the Active Time of UE comprise the following time:

The competition of onDurationTimer or drx-InactivityTimer or drx-RetransmissionTimer or media access control layer solves the time of timer (mac-ContentionResolutionTimer) operation; UE waits for that base station sends the time of Physical Downlink Control Channel (PDCCH) after sending uplink scheduling request (Scheduling Request, SR); Monitoring is for the time of uplink synchronous adaptive retransmission dispatch; Send the rear time of waiting for accidental access response of random access guiding (preamble) code.

For short DRX cycle, the computing formula of On Duration is as follows:

[(SFN*10)+subframe?number]modulo(shortDRX-Cycle)=(drxStartOffset)modulo(shortDRX-Cycle)；

For long DRX cycle, the computing formula of On Duration is as follows:

[(SFN*10)+subframe?number]modulo(longDRX-Cycle)=drxStartOffset?modulo(longDRX-Cycle)；

Wherein: SFN is the SFN numbering of current wireless frame; Subframe number is the numbering of current subframe; ShortDRX-Cycle is short DRX cycle; LongDRX-Cycle is long DRX cycle; DrxStartOffset is the deviant that Radio Resource is controlled (RRC) signal deployment.

The peak rate of long-term evolution upgrading (LTE Advanced, LTE-A) system improves a lot than LTE system, requires to reach descending 1Gbps, up 500Mbps.Meanwhile, LTE-A system requirements and LTE system have good compatibility.Based on improve peak rate, with LTE system compatible and the needs that make full use of frequency spectrum resource, LTE-A system has been introduced carrier aggregation (Carrier Aggregation, CA) technology.

Carrier aggregation technology refers to that a plurality of cell can provide the mechanism of data transport service simultaneously for UE in UE a plurality of communities of polymerization (cell) simultaneously.The carrier wave that each cell is corresponding in the system of carrier aggregation can be continuous or discrete at frequency domain, for LTE system compatible, the maximum bandwidth of each member carrier is 20MHz, the bandwidth between each member carrier can be identical or different.

Under carrier aggregation, terminal works little divided into a main plot (Primary Cell, PCell) and several auxiliary communities (SCell), the work of most of control and signaling has been born in main plot, as send to the uplink feedback of downlink data, channel quality indication (CQI) report, ascending pilot frequency transmission etc., auxiliary community is mainly as resource, bears the function of transfer of data.

In R10/R11 CA system, the resource of UE under only can base station of polymerization, has adopted public (common) DRX technology in order to economize on electricity, and introduces activation/deactivation mechanism simultaneously and further reduces electric quantity consumption under common DRX mechanism.The Active Time of the resource of all communities that so-called common DRX is UE polymerization is identical.

The network architecture of LTE as shown in Figure 2, adopts S1-MME interface to be connected between Mobility Management Entity (Mobility Management Entity, MME) and eNB; ENB completes Access Network function, passes through idle port communication with user terminal (UE).The UE that is attached to network for each, has a MME to provide service for it, and this MME is called the serving MME of UE.

Statistics shows, traditional macro base station (Macro eNB) individual layer overlay network can not meet people to data service rate and the ever-increasing demand of capacity.Therefore, (the 3rd Generation Partnership Project of 3G (Third Generation) Moblie standardization body, the mode of 3GPP) having introduced layering networking solves this problem, by in hot spot region, to lay some lower powered base stations be home base stations (Local eNB) to the little overlay environment such as family's indoor environment, working environment, comprise the forms such as Home eNodeB (Femto)/micro-base station (Pico)/trunking (Relay), to obtain the effect of cell splitting, make operator to provide more high data rate, business more cheaply for user.

At evolved universal terrestrial radio access network (Evolved Universal Terrestrial Radio Access Network, E-UTRAN) on framework basis, if introduce layering networking, the so new heterogeneous network deployment scenario that comprises Local eNB and Macro eNB as shown in Figure 3.Wherein Macro eNB provides grand covering, and Local eNB provides focus to cover in grand coverage.

Under this network architecture, the UE in Local eNB and the common coverage of Macro eNB can be used the resource of Local eNB and Macro eNB simultaneously, but both SFN or subframe numbering allow asynchronous.

To sum up, for R11 and the UE of version before, UE only can be operated under a base station and the Xia community, same base station of UE polymerization requires SFN Complete Synchronization, therefore can be easy to realize common DRX.For R12 and system afterwards, along with the heterogeneous network of layering networking is introduced, be positioned at the overlapping covered UE in a plurality of base stations resource of a plurality of base stations of polymerization simultaneously, but the SFN of these nodes, or SFN and subframe numbering may be all nonsynchronous, therefore need to consider how to realize in this case common DRX.

Summary of the invention

The embodiment of the present invention provides a kind of discontinuous reception DRX maintaining method and equipment, for solving in terminal simultaneously during the resource of a plurality of base stations of polymerization, and the problem of how to carry out DRX maintenance.

A DRX maintaining method, the method comprises:

The terminal of the resource of a plurality of base stations of polymerization receives the DRX configuration parameter that a base station in described a plurality of base stations issues;

Described terminal is chosen a base station as reference synchronization base station from described a plurality of base stations, according to the system frame number SFN of described DRX configuration parameter and described reference synchronization base station and subframe numbering, carries out DRX maintenance.

, this terminal comprises:

Parameter receiving element, the discontinuous reception DRX configuration parameter issuing for receiving a base station of a plurality of base stations of this terminal polymerization;

DRX maintenance unit, for choosing a base station as reference synchronization base station from described a plurality of base stations, according to the system frame number SFN of described DRX configuration parameter and described reference synchronization base station and subframe numbering, carries out DRX maintenance.

In the first scheme that the embodiment of the present invention provides, the terminal of the resource of a plurality of base stations of polymerization receives the DRX configuration parameter that a base station in the plurality of base station issues; From the plurality of base station, choose a base station as reference synchronization base station, according to the SFN of this DRX configuration parameter and this reference synchronization base station and subframe numbering, carry out DRX maintenance.Visible, in this programme, realize terminal and carried out DRX maintenance according to the time of a base station in a plurality of base stations of polymerization, thereby solved when the resource of terminal while a plurality of base stations of polymerization the problem how terminal carries out DRX maintenance.

A DRX maintaining method, the method comprises:

Reference synchronization base station obtains the DRX configuration parameter of terminal; Described reference synchronization base station is that the ，Gai base station, a base station in a plurality of base stations of terminal polymerization is that this terminal is numbered corresponding base station in system frame number SFN and the subframe of carrying out using when DRX safeguards;

DRX maintenance, according to the SFN of described DRX configuration parameter, self scheduling situation and described reference synchronization base station and subframe numbering, is carried out in described reference synchronization base station.

，Gai base station, a kind of base station comprises:

Parameter acquiring unit, when being reference synchronization base station in this base station, obtains the discontinuous reception DRX configuration parameter of terminal; This reference synchronization base station be in a plurality of base stations of this terminal polymerization, this terminal numbers corresponding base station in system frame number SFN and the subframe of carrying out using when DRX safeguards;

DRX maintenance unit, for according to the SFN of described DRX configuration parameter, self scheduling situation and described reference synchronization base station and subframe numbering, carries out DRX maintenance.

In the first scheme that the embodiment of the present invention provides, reference synchronization base station in a plurality of base stations of terminal polymerization obtains the DRX configuration parameter of terminal, according to the SFN of this DRX configuration parameter, self scheduling situation and this reference synchronization base station and subframe numbering, carry out DRX maintenance.Visible, in this programme, realize reference synchronization base station and carried out DRX maintenance according to the time of self, thereby solved when the resource of terminal while a plurality of base stations of polymerization the problem how reference synchronization base station wherein carries out DRX maintenance.

A DRX maintaining method, the method comprises:

Asynchronous reference base station is obtained the DRX configuration parameter of terminal; Described asynchronous reference base station is the base station except reference synchronization base station in a plurality of base stations of terminal polymerization, and described reference synchronization base station is that this terminal is numbered corresponding base station in system frame number SFN and the subframe of carrying out using when DRX safeguards;

Described asynchronous reference base station is obtained SFN difference and/or the subframe numbering difference of self and described reference synchronization base station, according to this SFN difference and/or subframe numbering difference, the SFN of this asynchronous reference base station and/or subframe numbering is revised;

Described asynchronous reference base station, according to described DRX configuration parameter, self scheduling situation and revised SFN and/or revised subframe numbering, is carried out DRX maintenance.

，Gai base station, a kind of base station comprises:

Parameter acquiring unit, when being non-reference synchronization base station in this base station, obtains the discontinuous reception DRX configuration parameter of terminal; This asynchronous reference base station is the base station except reference synchronization base station in a plurality of base stations of terminal polymerization, and described reference synchronization base station is that this terminal is numbered corresponding base station in system frame number SFN and the subframe of carrying out using when DRX safeguards;

Difference acquiring unit, for obtaining SFN difference and/or the subframe numbering difference of this base station and described reference synchronization base station;

Time amending unit, for revising the SFN of this asynchronous reference base station and/or subframe numbering according to this SFN difference and/or subframe numbering difference;

DRX maintenance unit, for according to described DRX configuration parameter, self scheduling situation and revised SFN and/or revised subframe numbering, carries out DRX maintenance.

In the third scheme that the embodiment of the present invention provides, asynchronous reference base station in a plurality of base stations of terminal polymerization is obtained the DRX configuration parameter of terminal, obtain SFN difference and/or the subframe numbering difference of self and reference synchronization base station, according to this SFN difference and/or subframe numbering difference, the SFN of this asynchronous reference base station and/or subframe numbering are revised, and according to this DRX configuration parameter, self scheduling situation and revised SFN and/or revised subframe numbering, carry out DRX maintenance.Visible, after in this programme, asynchronous reference base station is revised the time of self (SFN and/or subframe numbering) according to the time difference of self and reference synchronization base station (SFN difference and/or subframe numbering difference), carry out DRX maintenance according to the revised time, thereby solved when the resource of terminal while a plurality of base stations of polymerization the problem how asynchronous reference base station wherein carries out DRX maintenance.

Accompanying drawing explanation

Fig. 1 is DRX process schematic diagram of the prior art;

Fig. 2 is E-UTRAN network architecture schematic diagram of the prior art;

Fig. 3 is the heterogeneous network deployment scenario schematic diagram that comprises Local eNB and Macro eNB of the prior art;

The method flow schematic diagram that Fig. 4 provides for the embodiment of the present invention;

The other method schematic flow sheet that Fig. 5 provides for the embodiment of the present invention;

The another method flow schematic diagram that Fig. 6 provides for the embodiment of the present invention;

The terminal structure schematic diagram that Fig. 7 provides for the embodiment of the present invention;

The architecture of base station schematic diagram that Fig. 8 provides for the embodiment of the present invention;

The architecture of base station schematic diagram that Fig. 9 provides for the embodiment of the present invention.

Embodiment

In order to solve in terminal simultaneously during the resource of a plurality of base stations of polymerization, the problem how terminal carries out DRX maintenance, the embodiment of the present invention provides the first DRX maintaining method.

Referring to Fig. 4, the first DRX maintaining method that the embodiment of the present invention provides, comprises the following steps:

Step 40: the terminal of the resource of a plurality of base stations of polymerization receives the DRX configuration parameter that a base station in the plurality of base station issues;

Step 41: terminal is chosen a base station as reference synchronization base station from the plurality of base station, according to the System Frame Number (SFN) of this DRX configuration parameter and this reference synchronization base station and subframe numbering, carries out DRX maintenance.

In step 41, terminal can be chosen reference synchronization base station according to pre-configured principle.Such as, select the base station of first polymerization of UE or the base station at RRC connection place etc.Terminal is carried out DRX and is safeguarded and to refer to and carry out any operation relevant with end side DRX mechanism, comprises definite lasting listening period (On Duration), and according to On Duration monitoring control channel (PDCCH), i.e. monitoring control channel in On Duration; Here, determine that the method for On Duration can be as follows:

For short DRX cycle, the computing formula of On Duration is as follows:

For long DRX cycle, the computing formula of On Duration is as follows:

Wherein: modulo represents delivery; SFN is the SFN of current reference synchronization base station; Subframe number is the subframe numbering of current reference synchronization base station; ShortDRX-Cycle is short DRX cycle; LongDRX-Cycle is long DRX cycle; DrxStartOffset is the deviant that Radio Resource is controlled (RRC) signal deployment.

Terminal is carried out DRX and is safeguarded and can also comprise and safeguard the relevant timer of each DRX etc.Concrete maintaining method can be referring to the explanation of background technology.

Preferably, terminal can also, according to the temporal information (comprising SFN and/or subframe numbering) of the asynchronous reference base station in the temporal information of the reference synchronization base station of reading from broadcast (comprising SFN and/or subframe numbering) and the plurality of base station, be determined the time difference information (comprising SFN difference and/or subframe numbering difference) of this reference synchronization base station and asynchronous reference base station; Then, terminal reports other base stations except this asynchronous reference base station in this asynchronous reference base station or the plurality of base station by this time difference information (comprising SFN difference and/or subframe numbering difference), and these other base stations can be transmitted to time difference information this asynchronous reference base station.

In this method, DRX configuration parameter can comprise that be correlated with timing length, short DRX cycle length, long DRX cycle length, the DRX of timer (comprising onDurationTimer, Short DRX cycle Timer, drx-InactivityTimer, HARQ RTT Timer, drx-RetransmissionTimer) of following parameter: DRX starts deviant (drxStartOffset).Certainly, DRX configuration parameter is not limited to above-mentioned parameter, and any parameter of safeguarding for DRX is all in protection scope of the present invention, such as other DRX parameter of later release increase.

In order to solve in terminal simultaneously during the resource of a plurality of base stations of polymerization, the problem how the reference synchronization base station in the plurality of base station carries out DRX maintenance, the embodiment of the present invention provides the second DRX maintaining method.

Referring to Fig. 5, the second DRX maintaining method that the embodiment of the present invention provides, comprises the following steps:

Step 50: reference synchronization base station obtains the DRX configuration parameter of terminal; This reference synchronization base station is that the ，Gai base station, a base station in a plurality of base stations of terminal polymerization is that this terminal is numbered corresponding base station in SFN and the subframe of carrying out using when DRX safeguards;

Step 51: DRX maintenance, according to the SFN of this DRX configuration parameter, self scheduling situation and this reference synchronization base station and subframe numbering, is carried out in reference synchronization base station.

In step 51, reference synchronization base station is carried out DRX and is safeguarded any operation that refers to that execution is relevant to base station side DRX mechanism, comprises and determines On Duration, and transmit control channel according to On Duration, in On Duration, transmits control channel; Here, determine that the method for On Duration can be as follows:

For short DRX cycle, the computing formula of On Duration is as follows:

For long DRX cycle, the computing formula of On Duration is as follows:

Wherein: SFN is the SFN of current reference synchronization base station; Subframe number is the subframe numbering of current reference synchronization base station; ShortDRX-Cycle is short DRX cycle; LongDRX-Cycle is long DRX cycle; DrxStartOffset is the deviant that Radio Resource is controlled (RRC) signal deployment.

Reference synchronization base station is carried out DRX and is safeguarded and can also comprise and safeguard the relevant timer of each DRX etc.Concrete maintaining method can be in full accord with the maintenance mode of end side, can be with reference to LTE agreement TS36.321.

In step 50, reference synchronization base station obtains the DRX configuration parameter of terminal, and specific implementation can be as follows:

Reference synchronization base station self generates DRX configuration parameter, or receives by inter-base station interface the DRX configuration parameter that the asynchronous reference base station in a plurality of base stations sends.

Preferably, in reference synchronization base station self, generate after DRX configuration parameter, terminal can also be handed down to by this DRX configuration parameter in reference synchronization base station, so that terminal is carried out DRX maintenance according to this DRX configuration parameter; Reference synchronization base station can also send to this DRX configuration parameter by inter-base station interface the asynchronous reference base station in a plurality of base stations that participate in polymerization, so that asynchronous reference base station is carried out DRX maintenance according to DRX configuration parameter.

Preferably, during asynchronous reference base station in this DRX configuration parameter being sent to by inter-base station interface to a plurality of base stations that participate in polymerization, also terminal iidentification corresponding to this DRX configuration parameter sent to the asynchronous reference base station in a plurality of base stations that participate in polymerization so that asynchronous reference base station can according to this terminal iidentification determine carry out DRX safeguard for terminal.

In this method, DRX configuration parameter can include but not limited to following parameter:

DRX be correlated with timer timing length, short DRX cycle length, long DRX cycle length, the drxStartOffset of (comprising onDurationTimer, Short DRX cycle Timer, drx-InactivityTimer, HARQ RTT Timer, drx-RetransmissionTimer).Certainly, DRX configuration parameter is not limited to above-mentioned parameter, and any parameter of safeguarding for DRX is all in protection scope of the present invention, such as other DRX parameter of later release increase.

In order to solve in terminal simultaneously during the resource of a plurality of base stations of polymerization, the problem how asynchronous reference base station in the plurality of base station carries out DRX maintenance, the embodiment of the present invention provides the third DRX maintaining method.

Referring to Fig. 6, the third DRX maintaining method that the embodiment of the present invention provides, comprises the following steps:

Step 60: asynchronous reference base station is obtained the DRX configuration parameter of terminal; This asynchronous reference base station is the base station except reference synchronization base station in a plurality of base stations of terminal polymerization, and this reference synchronization base station is that this terminal is numbered corresponding base station in SFN and the subframe of carrying out using when DRX safeguards;

Step 61: asynchronous reference base station is obtained the time difference information (comprising SFN difference and/or subframe numbering difference) of self and reference synchronization base station, according to this time difference information (comprising SFN difference and/or subframe numbering difference), the temporal information of this asynchronous reference base station (comprising SFN and/or subframe numbering) is revised;

Step 62: asynchronous reference base station, according to this DRX configuration parameter, self scheduling situation and revised temporal information (comprising revised SFN and/or revised subframe numbering), is carried out DRX maintenance.

In step 62, asynchronous reference base station is carried out DRX and is safeguarded any operation that refers to that execution is relevant to base station side DRX mechanism, comprises and determines On Duration, and transmit control channel according to On Duration, in On Duration, transmits control channel; Here, determine that the method for On Duration can be as follows:

For short DRX cycle, the computing formula of On Duration is as follows:

For long DRX cycle, the computing formula of On Duration is as follows:

Wherein: SFN is current revised SFN; Subframe number is current revised subframe numbering; ShortDRX-Cycle is short DRX cycle; LongDRX-Cycle is long DRX cycle; DrxStartOffset is the deviant that Radio Resource is controlled (RRC) signal deployment.

Asynchronous reference base station is carried out DRX and is safeguarded and can also comprise and safeguard the relevant timer of each DRX etc.Concrete maintaining method can be in full accord with the maintenance mode of end side, can be with reference to LTE agreement TS36.321.

In step 60, asynchronous reference base station is obtained the DRX configuration parameter of terminal, and specific implementation can be as follows:

Asynchronous reference base station self generates DRX configuration parameter, or receives the DRX configuration parameter that other base stations in a plurality of base stations send by inter-base station interface.

Preferably, in asynchronous reference base station self, generate after DRX configuration parameter, asynchronous reference base station can also be handed down to terminal by this DRX configuration parameter, so that terminal is carried out DRX maintenance according to this DRX configuration parameter; Asynchronous reference base station can also send to this DRX configuration parameter by inter-base station interface other base stations in a plurality of base stations that participate in polymerization, so that asynchronous reference base station is carried out DRX maintenance according to DRX configuration parameter.

Preferably, during other base stations in this DRX configuration parameter being sent to by inter-base station interface to a plurality of base stations that participate in polymerization, also terminal iidentification corresponding to this DRX configuration parameter sent to other base stations in a plurality of base stations that participate in polymerization so that other base stations can according to this terminal iidentification determine carry out DRX safeguard for terminal.

In step 61, asynchronous reference base station is obtained the time difference information (comprising SFN difference and/or subframe numbering difference) of self and reference synchronization base station, and specific implementation can be as follows:

That asynchronous reference base station receiving terminal reports or other participate in the time difference information (comprise SFN difference and/or subframe number difference) of asynchronous reference base station that polymerization base stations forward and reference synchronization base station; Or,

Asynchronous reference base station, according to the temporal information of the reference synchronization base station of reading from the broadcast of reference synchronization base station (comprising SFN and/or subframe numbering), is determined the time difference information (comprising SFN difference and/or subframe numbering difference) of asynchronous reference base station and reference synchronization base station.

In step 61, according to time difference information (comprising SFN difference and/or subframe numbering difference), the temporal information of this asynchronous reference base station (comprising SFN and/or subframe numbering) is revised, specific implementation can be as follows:

If SFN difference equals the SFN that the SFN of reference synchronization base station deducts asynchronous reference base station, subframe numbering difference equals the subframe of reference synchronization base station and numbers the subframe numbering that deducts asynchronous reference base station, the SFN of this asynchronous reference base station and SFN difference are added, obtain revised SFN, the subframe numbering of this asynchronous reference base station and subframe numbering difference are added, obtain revised subframe numbering; Or,

If SFN difference equals the SFN that the SFN of asynchronous reference base station deducts reference synchronization base station, subframe numbering difference equals the subframe of asynchronous reference base station and numbers the subframe numbering that deducts reference synchronization base station, the SFN of this asynchronous reference base station and SFN difference are subtracted each other, obtain revised SFN, the subframe numbering of this asynchronous reference base station and subframe numbering difference are subtracted each other, obtain revised subframe numbering.

Certainly, also can only to SFN, revise, or only antithetical phrase frame number is revised, concrete grammar is the same, repeats no more here.

Reference synchronization base station in the present invention can be any one base station of UE polymerization, and asynchronous reference base station can be other base station except synchronising base station in the base station of UE polymerization.Such as, macro base station can be selected in reference synchronization base station, and asynchronous reference base station is home base stations; Or home base stations can be selected in reference synchronization base station, asynchronous reference base station is macro base station.

Below in conjunction with specific embodiment, the present invention will be described:

Embodiment mono-:

The present embodiment is safeguarded the DRX of UE according to the SFN of Macro eNB and subframe numbering;

Step 1:DRX parameter configuration;

Macro eNB is handed down to UE by DRX configuration parameter, and DRX configuration parameter comprises onDurationTimer length, drx-Inactivitytimer length etc.; Macro eNB need to notify the eNB to Local by DRX configuration parameter by the interface between Macro eNB and Local eNB.

If Local eNB has RRC configuration feature, DRX configuration parameter also can be configured to UE by Local eNB so, and same Local eNB also needs by DRX configuration parameter, to notify the eNB to Macro by the interface between Local eNB and Macro eNB.

The DRX of step 2:UE side safeguards;

UE enables DRX mechanism after receiving DRX configuration parameter, the same current mechanism of maintenance of each DRX process of UE side, difference is only that the different base station of UE polymerization may have different SFN/ subframe numberings, the SFN/ subframe numbering that the SFN/ subframe numbering that UE calculating On Duration is used should be got Macro eNB.Concrete On Duration computing formula is with background introduction part.

The DRX of step 3:Macro eNB side safeguards;

Once Macro eNB has configured DRX for UE, so also need to start the DRX of this UE is safeguarded, concrete maintenance process can be used current mechanism, DRX safeguard to need considers the scheduling situation of self and DRX media access control (MAC) control unit (CE) self sending, and does not consider the DRX MAC CE that scheduling situation under Local eNB and Local eNB send.The place should be noted that is that Macro eNB is used the SFN/ subframe numbering of self to calculate the On Duration of UE.

Step 4: other DRX that participates in the Local eNB of polymerization safeguards;

1) SFN/ subframe numbering difference;

The Local eNB that participates in polymerization for other, first needs to obtain SFN difference and subframe numbering difference between Macro eNB and Local eNB, i.e. Δ SFN/ Δ subframe, and concrete obtain manner can have following two kinds:

Mode 1:UE calculates and reports the Δ SFN/ Δ subframe between Macro eNB and Local eNB, if this difference has reported Macro eNB, Macro eNB need to notify the eNB to Local by Δ SFN/ Δ subframe by the interface between Macro eNB and Local eNB so.

When mode 2:Local eNB starts shooting or receives the carrying detach request of Macro eNB transmission, read the broadcast of Macro eNB, obtain FSN and the subframe numbering of Macro eNB, and calculate the Δ SFN/ Δ subframe of Macro eNB and Local eNB.Once the SFN/ subframe generation saltus step of Macro eNB, can notify the eNB to Local by saltus step information by the interface between Macro eNB and Local eNB, so that Local eNB revises Δ SFN/ Δ subframe according to saltus step information.Can certainly calculate Δ SFN/ Δ subframe by Macro eNB, process is identical.

2) computational methods of On Duration;

Local eNB side is safeguarded same current mechanism to the DRX of UE, when difference is only to calculate the On Duration of UE, need to the SFN/ subframe numbering of Local eNB, revise according to Δ SFN/ Δ subframe.A kind of modification method of example is as follows:

Suppose:

ΔSFN=Macro?eNB?SFN-Local?eNB?SFN；

Δ subframe=Macro eNB subframe numbering-Local eNB subframe numbering;

Under Local eNB, the computing formula of the On Duration under short DRX cycle and long DRX cycle need to be done following correction so:

For short DRX cycle, the computing formula of On Duration is as follows:

[(SFN*10)+subframe?number]modulo(shortDRX-Cycle)=(drxStartOffset)modulo(shortDRX-Cycle);

For long DRX cycle, onduration computing formula is as follows:

In above-mentioned two formulas, the SFN+ Δ SFN of the current Local eNB of SFN=;

The subframe number+ Δ subframe of the current Local eNB of Subframe number=.

Embodiment bis-:

The present embodiment is safeguarded the DRX of UE according to the SFN of Local eNB and subframe numbering.UE allows polymerization Macro eNB and a plurality of Local eNB, take Macro eNB of only polymerization and Local eNB here to describe as example, and its behavior of Local node that participates in polymerization for other is consistent with Macro eNB.

Step 1:DRX parameter configuration;

The DRX of step 2:UE side safeguards;

UE enables DRX mechanism after receiving DRX configuration parameter, the same current mechanism of maintenance of each DRX process of UE side, difference is only that the different base station of UE polymerization may have different SFN/ subframe numberings, the SFN/ subframe numbering that the SFN/ subframe numbering that UE calculating On Duration is used should be got Local eNB.Concrete On Duration computing formula is with background introduction part.

The DRX of step 3:Local eNB side safeguards;

Once Local eNB has configured DRX for UE, so also need to start the DRX of this UE is safeguarded, concrete maintenance process can be used current mechanism, DRX safeguards and only to consider the scheduling situation of Local eNB self and the DRX MAC CE self sending, and do not consider the DRX MAC CE that scheduling situation under Macro eNB and Macro eNB send.The place should be noted that is that Local eNB is used the SFN/ subframe numbering of self to calculate the On Duration of UE.

The DRX of step 4:Macro eNB side safeguards;

1) SFN/ subframe numbering difference is obtained;

For the Macro eNB that participates in polymerization, first need to obtain SFN and subframe numbering difference between Macro eNB and Local eNB, i.e. Δ SFN/ Δ subframe, concrete obtain manner can have following two kinds:

Mode 1:UE calculates and reports the Δ SFN/ Δ subframe between Macro eNB and Local eNB, if UE has reported Local eNB by this difference, Local eNB need to be by inter-base station interface by this difference notice Macro eNB so.

When mode 2:Local eNB starts shooting or receives the carrying detach request of Macro eNB transmission, oneself read the broadcast of Macro eNB, obtain FSN and the subframe numbering of Macro eNB, and calculate the Δ SFN/ Δ subframe of Macro eNB and Local eNB, and notify the eNB to Macro by Δ SFN/ Δ subframe.Once the SFN/ subframe generation saltus step of Local eNB, can notify the eNB to Macro by saltus step information by the interface between Macro eNB and Local eNB, so that Macro eNB revises Δ SFN/ Δ subframe according to saltus step information.Can certainly calculate Δ SFN/ Δ subframe by Macro eNB, process is identical.

2) computational methods of On Duration;

Macro eNB side is safeguarded same current mechanism to the DRX of UE, when difference is only to calculate the On Duration of UE, need to the SFN/ subframe numbering of Macro eNB, revise according to Δ SFN/ Δ subframe.A kind of modification method of example is as follows:

Suppose:

ΔSFN=Macro?eNB?SFN-Local?eNB?SFN；

Δ subframe=Macro eNB subframe numbering-Local eNB subframe numbering;

Under Macro eNB, the computing formula of the On Duration under short DRX cycle and long DRX cycle need to be done following correction so:

For short DRX cycle, the computing formula of On Duration is as follows:

For long DRX cycle, the computing formula of On Duration is as follows:

In above-mentioned two formulas, the SFN – Δ SFN of the current Macro eNB of SFN=;

The subframe number – Δ subframe of the current Macro eNB of Subframe munber=.

Referring to Fig. 7, the embodiment of the present invention provides a kind of terminal, and this terminal comprises:

Parameter receiving element 70, the discontinuous reception DRX configuration parameter issuing for receiving a base station of a plurality of base stations of this terminal polymerization;

DRX maintenance unit 71, for choosing a base station as reference synchronization base station from described a plurality of base stations, according to the system frame number SFN of described DRX configuration parameter and described reference synchronization base station and subframe numbering, carries out DRX maintenance.

Further, described DRX maintenance unit 71 for: according to described DRX configuration parameter and

System frame number SFN and the subframe of described reference synchronization base station

Numbering, determines and continues listening period On Duration, and according to On Duration monitoring control channel.

Further, this terminal also comprises:

Difference reports unit 72, for according to the SFN of the asynchronous reference base station the SFN of the described reference synchronization base station of reading from broadcast and/or subframe numbering and described a plurality of base station and/or subframe numbering, determine SFN difference and/or the subframe numbering difference of described reference synchronization base station and described asynchronous reference base station;

Described SFN difference and/or subframe numbering difference are reported to other base stations except this asynchronous reference base station in described asynchronous reference base station or described a plurality of base station.

Further, described DRX configuration parameter comprises following parameter:

Timing length, short DRX cycle length, long DRX cycle length, the DRX of the relevant timer of DRX start deviant drxStartOffset.

Referring to Fig. 8, the embodiment of the present invention provides ，Gai base station, a kind of base station to comprise:

Parameter acquiring unit 80, when being reference synchronization base station in this base station, obtains the discontinuous reception DRX configuration parameter of terminal; This reference synchronization base station be in a plurality of base stations of this terminal polymerization, this terminal numbers corresponding base station in system frame number SFN and the subframe of carrying out using when DRX safeguards;

DRX maintenance unit 81, for according to the SFN of described DRX configuration parameter, self scheduling situation and described reference synchronization base station and subframe numbering, carries out DRX maintenance.

Further, described DRX maintenance unit 81 for:

According to the SFN of described DRX configuration parameter, self scheduling situation and described reference synchronization base station and subframe numbering, determine and continue listening period On Duration, and transmit control channel according to On Duration.

Further, described parameter acquiring unit 80 for:

Generate DRX configuration parameter, or receive by inter-base station interface the DRX configuration parameter that the asynchronous reference base station in described a plurality of base station sends.

Further, this base station also comprises:

Parameter retransmission unit 82, for after generating DRX configuration parameter, is handed down to described terminal by this DRX configuration parameter, and by inter-base station interface, this DRX configuration parameter is sent to the asynchronous reference base station in a plurality of base stations of described participation polymerization.

Further, described parameter retransmission unit 82 also for:

During asynchronous reference base station in a plurality of base stations that by inter-base station interface, this DRX configuration parameter sent to described participation polymerization, also terminal iidentification corresponding to this DRX configuration parameter sent to the asynchronous reference base station in a plurality of base stations of described participation polymerization.

Further, described DRX configuration parameter comprises:

Referring to Fig. 9 embodiment of the present invention, provide ，Gai base station, a kind of base station to comprise:

Parameter acquiring unit 90, when being non-reference synchronization base station in this base station, obtains the discontinuous reception DRX configuration parameter of terminal; This asynchronous reference base station is the base station except reference synchronization base station in a plurality of base stations of terminal polymerization, and described reference synchronization base station is that this terminal is numbered corresponding base station in system frame number SFN and the subframe of carrying out using when DRX safeguards;

Difference acquiring unit 91, for obtaining SFN difference and/or the subframe numbering difference of this base station and described reference synchronization base station;

Time amending unit 92, for revising the SFN of this asynchronous reference base station and/or subframe numbering according to this SFN difference and/or subframe numbering difference;

DRX maintenance unit 93, for according to described DRX configuration parameter, self scheduling situation and revised SFN and/or revised subframe numbering, carries out DRX maintenance.

Further, described DRX maintenance unit 93 for:

According to described DRX configuration parameter, self scheduling situation and revised SFN and/or revised subframe numbering, determine and continue listening period On Duration, and transmit control channel according to On Duration.

Further, described parameter acquiring unit 90 for:

Generate DRX configuration parameter, or receive the DRX configuration parameter that other base stations in described a plurality of base station send by inter-base station interface.

Further, this base station also comprises:

Parameter retransmission unit 94, for after generating DRX configuration parameter, is handed down to described terminal by this DRX configuration parameter, and by inter-base station interface, this DRX configuration parameter is sent to other base stations in a plurality of base stations of described participation polymerization.

Further, described parameter retransmission unit 94 also for:

During other base stations in a plurality of base stations that by inter-base station interface, this DRX configuration parameter sent to described participation polymerization, also terminal iidentification corresponding to this DRX configuration parameter sent to other base stations in a plurality of base stations of described participation polymerization.

Further, described difference acquiring unit 91 for:

Receive SFN difference and/or the subframe numbering difference of described asynchronous reference base station described terminal to report or that other participation polymerization base stations forward and described reference synchronization base station; Or,

According to the SFN of the described reference synchronization base station of reading the broadcast from described reference synchronization base station and/or subframe numbering, determine SFN difference and/or the subframe numbering difference of described asynchronous reference base station and described reference synchronization base station.

Further, described time amending unit 92 for:

If described SFN difference equals the SFN that the SFN of described reference synchronization base station deducts described asynchronous reference base station, the subframe numbering that described subframe numbering difference equals described reference synchronization base station deducts the subframe numbering of described asynchronous reference base station, the SFN of this asynchronous reference base station and described SFN difference are added, obtain revised SFN, the subframe numbering of this asynchronous reference base station and described subframe numbering difference are added, obtain revised subframe numbering; Or,

If the SFN that described SFN difference equals described asynchronous reference base station deducts the SFN of described reference synchronization base station, the subframe numbering that described subframe numbering difference equals described asynchronous reference base station deducts the subframe numbering of described reference synchronization base station, the SFN of this asynchronous reference base station and described SFN difference are subtracted each other, obtain revised SFN, the subframe numbering of this asynchronous reference base station and described subframe numbering difference are subtracted each other, obtain revised subframe numbering.

Further, described DRX configuration parameter comprises:

To sum up, beneficial effect of the present invention comprises:

The present invention is with reference to describing according to flow chart and/or the block diagram of the method for the embodiment of the present invention, equipment (system) and computer program.Should understand can be in computer program instructions realization flow figure and/or block diagram each flow process and/or the flow process in square frame and flow chart and/or block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, the instruction of carrying out by the processor of computer or other programmable data processing device is produced for realizing the device in the function of flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.

These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, the instruction that makes to be stored in this computer-readable memory produces the manufacture that comprises command device, and this command device is realized the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.

These computer program instructions also can be loaded in computer or other programmable data processing device, make to carry out sequence of operations step to produce computer implemented processing on computer or other programmable devices, thereby the instruction of carrying out is provided for realizing the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame on computer or other programmable devices.

Although described the preferred embodiments of the present invention, once those skilled in the art obtain the basic creative concept of cicada, can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.

Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.

Claims

1. a discontinuous reception DRX maintaining method, is characterized in that, the method comprises:

2. the method for claim 1, is characterized in that, described in carry out DRX and safeguard and to comprise:

Determine and continue listening period On Duration, and according to On Duration monitoring control channel.

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

Described terminal, according to the SFN of the asynchronous reference base station in the SFN of the described reference synchronization base station of reading from broadcast and/or subframe numbering and described a plurality of base station and/or subframe numbering, is determined SFN difference and/or the subframe numbering difference of described reference synchronization base station and described asynchronous reference base station;

Described terminal reports other base stations except this asynchronous reference base station in described asynchronous reference base station or described a plurality of base station by described SFN difference and/or subframe numbering difference.

4. method as claimed in claim 1 or 2, is characterized in that, described DRX configuration parameter comprises following parameter:

5. a discontinuous reception DRX maintaining method, is characterized in that, the method comprises:

6. method as claimed in claim 5, is characterized in that, described in carry out DRX and safeguard and to comprise:

Determine and continue listening period On Duration, and transmit control channel according to On Duration.

7. method as claimed in claim 5, is characterized in that, described reference synchronization base station obtains the DRX configuration parameter of terminal, specifically comprises:

Described reference synchronization base station self generates DRX configuration parameter, or receives by inter-base station interface the DRX configuration parameter that the asynchronous reference base station in described a plurality of base station sends.

8. method as claimed in claim 7, is characterized in that, in described reference synchronization base station self, generates after DRX configuration parameter, further comprises:

Described terminal is handed down to by this DRX configuration parameter in described reference synchronization base station, and by inter-base station interface, this DRX configuration parameter is sent to the asynchronous reference base station in a plurality of base stations of described participation polymerization.

9. method as claimed in claim 8, it is characterized in that, during asynchronous reference base station in a plurality of base stations that by inter-base station interface, this DRX configuration parameter sent to described participation polymerization, also terminal iidentification corresponding to this DRX configuration parameter sent to the asynchronous reference base station in a plurality of base stations of described participation polymerization.

10. as the method as described in arbitrary in claim 5-9, it is characterized in that, described DRX configuration parameter comprises:

11. 1 kinds of discontinuous reception DRX maintaining methods, is characterized in that, the method comprises:

12. methods as claimed in claim 11, is characterized in that, described in carry out DRX and safeguard and to comprise:

13. methods as claimed in claim 11, is characterized in that, described asynchronous reference base station is obtained the DRX configuration parameter of terminal, specifically comprises:

Described asynchronous reference base station self generates DRX configuration parameter, or receives the DRX configuration parameter that other base stations in described a plurality of base station send by inter-base station interface.

14. methods as claimed in claim 13, is characterized in that, in described asynchronous reference base station self, generate after DRX configuration parameter, further comprise:

Described asynchronous reference base station is handed down to described terminal by this DRX configuration parameter, and by inter-base station interface, this DRX configuration parameter is sent to other base stations in a plurality of base stations of described participation polymerization.

15. methods as claimed in claim 14, it is characterized in that, during other base stations in a plurality of base stations that by inter-base station interface, this DRX configuration parameter sent to described participation polymerization, also terminal iidentification corresponding to this DRX configuration parameter sent to other base stations in a plurality of base stations of described participation polymerization.

16. methods as claimed in claim 11, is characterized in that, described asynchronous reference base station is obtained SFN difference and the subframe numbering difference of self and described reference synchronization base station, specifically comprises:

Described asynchronous reference base station receives SFN difference and/or the subframe numbering difference of described asynchronous reference base station described terminal to report or that other participation polymerization base stations forward and described reference synchronization base station; Or,

Described asynchronous reference base station, according to the SFN of the described reference synchronization base station of reading from the broadcast of described reference synchronization base station and/or subframe numbering, is determined SFN difference and/or the subframe numbering difference of described asynchronous reference base station and described reference synchronization base station.

17. as the method as described in arbitrary in claim 11-16, it is characterized in that, describedly according to this SFN difference and/or subframe numbering difference, the SFN of this asynchronous reference base station and/or subframe numbering is revised, and specifically comprises:

18. as the method as described in arbitrary in claim 11-16, it is characterized in that, described DRX configuration parameter comprises:

19. 1 kinds of terminals, is characterized in that, this terminal comprises:

20. terminals as claimed in claim 19, is characterized in that, described DRX maintenance unit is used for:

According to the system frame number SFN of described DRX configuration parameter and described reference synchronization base station and subframe numbering, determine and continue listening period On Duration, and according to On Duration monitoring control channel.

21. terminals as described in claim 19 or 20, is characterized in that, this terminal also comprises:

Difference reports unit, for according to the SFN of the asynchronous reference base station the SFN of the described reference synchronization base station of reading from broadcast and/or subframe numbering and described a plurality of base station and/or subframe numbering, determine SFN difference and/or the subframe numbering difference of described reference synchronization base station and described asynchronous reference base station;

22. terminals as described in claim 19 or 20, is characterized in that, described DRX configuration parameter comprises following parameter:

23. 1 kinds of base stations, is characterized in that, this base station comprises:

24. base stations as claimed in claim 23, is characterized in that, described DRX maintenance unit is used for:

25. base stations as claimed in claim 23, is characterized in that, described parameter acquiring unit is used for:

26. base stations as claimed in claim 25, is characterized in that, this base station also comprises:

Parameter retransmission unit, for after generating DRX configuration parameter, is handed down to described terminal by this DRX configuration parameter, and by inter-base station interface, this DRX configuration parameter is sent to the asynchronous reference base station in a plurality of base stations of described participation polymerization.

27. base stations as claimed in claim 26, is characterized in that, described parameter retransmission unit also for:

28. as the base station as described in arbitrary in claim 23-27, it is characterized in that, described DRX configuration parameter comprises:

29. 1 kinds of base stations, is characterized in that, this base station comprises:

30. base stations as claimed in claim 29, is characterized in that, described DRX maintenance unit is used for:

31. base stations as claimed in claim 29, is characterized in that, described parameter acquiring unit is used for:

32. base stations as claimed in claim 31, is characterized in that, this base station also comprises:

Parameter retransmission unit, for after generating DRX configuration parameter, is handed down to described terminal by this DRX configuration parameter, and by inter-base station interface, this DRX configuration parameter is sent to other base stations in a plurality of base stations of described participation polymerization.

33. base stations as claimed in claim 32, is characterized in that, described parameter retransmission unit also for:

34. base stations as claimed in claim 29, is characterized in that, described difference acquiring unit is used for:

35. as the base station as described in arbitrary in claim 29-34, it is characterized in that, described time amending unit is used for:

36 as the base station as described in arbitrary in claim 29-34, it is characterized in that, described DRX configuration parameter comprises: