CN101568176B

CN101568176B - Method for realizing uplink synchronization

Info

Publication number: CN101568176B
Application number: CN2008100950174A
Authority: CN
Inventors: 陈慧; 黄河; 芮华
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2008-04-23
Filing date: 2008-04-23
Publication date: 2012-07-04
Anticipated expiration: 2028-04-23
Also published as: CN101568176A

Abstract

The invention discloses a method for realizing uplink synchronization, comprising the following steps: a base station determines a channel used for uplink transmission of user equipment (UE); if the determined channel is a special enhanced channel, the base station judges whether the UE is in an uplink synchronization state or not according to the uplink transmission condition and the downlink transmission condition of the UE, and if so, the base station carries out scheduling of the high-speed downlink shared channel of the UE; or else, the base station notifies the UE to carry out uplink synchronization; if the determined channel is a random access channel, the base station directly carries out scheduling of the high-speed downlink shared channel of the UE; or else, the base station judges whether the UE is in an uplink synchronization state or not according to the downlink transmission condition of the UE, and if the UE is not the uplink synchronization state, the base station notifies the UE to carry out uplink synchronization. The invention can reduce the misjudgement probability of the synchronization state of Node B to the UE, optimizes the establishment of the uplink synchronization of the UE, avoids the costs of additional saving signaling and reduces the downlink transmission delay of Node B.

Description

The uplink synchronous implementation method

Technical field

The present invention relates to the communications field, and especially, relate to a kind of uplink synchronous implementation method.

Background technology

At present; Third generation mobile gpp (3rd Generation partnershipproject; Abbreviate 3GPP as) accomplished the standardization effort that sub-district _ forward access channel (CELL_FACH) state in WCDMA access (Wideband CodeDivision Multiple Access the abbreviates WCDMA as) system strengthens.Wherein, It is to insert (HSPA) through in the CELL_FACH state, introducing high-speed packet that the CELL_FACH state strengthens; Promptly; High speed descending sharing channel (HS-DSCH) transmission channel with strengthen dedicated channel (E-DCH), strengthen the packet data transmission performance of this state, make it obtain less packet transfer delay and higher transmission rate.

In the version before the 3GPP Rel-7, HS-DSCH channel and E-DCH channel only use under CELL _ DCH (CELL_DCH) state.Network side is being subscriber equipment (User Equipment; Abbreviate UE as) when setting up the relevant radio bearer of down high speed DSCH Downlink Shared Channel (HS-DSCH); In advance for UE disposes one group of channel, this group channel comprises: at a high speed-shared control channel (HS-SCCH), at a high speed-share indicating channel (HS-SICH) and high speed-Radio Network Temporary Identifier (H-RNTI).This group HS-SCCH and HS-SICH channel are that a plurality of UE share, and H-RNTI is the UE special use, and UE judges through the H-RNTI on the identification HS-SCCH whether this transmission points to oneself.In a single day UE has detected the HS-SCCH channel that points to oneself, will read the information on the HS-SCCH channel.

The last concrete signaling content of HS-SCCH is as shown in Figure 1; Wherein, Code channel and gap information are high speed down sharing physical channel (HS-PDSCH) resources that indication UE is about to reception; Modulation system and transport block length are the transformats of indication HS-PDSCH, and, contain the H-RNTI information of UE in the cyclic redundancy check field.After predetermined timing time nHS-SCCH; UE receives data on the HS-PDSCH of appointment channel; And after the timing nHS-SICH of appointment, on the HS-SICH channel, mix automatic repeat requests (HARQ) feedback and channel quality indication (CQI) report.

With the TD-SCDMA system is example; The sketch map that a HS-DSCH under the CELL_DCH state sends is as shown in Figure 2: the E-DCH transmission course under the CELL_DCH state comprises; Node B (Node B) is the UE scheduling resource according to the dispatch request of UE; Send authorization message through enhancing-absolute grant channel (E-AGCH) channel to UE, the last enhancing-Radio Network Temporary Identifier that carries UE of E-AGCH (E-RNTI); Detect the E-AGCH of sensing oneself as UE after, after the timing of confirming, UE goes up at the enhancing-physical uplink channel (E-PUCH) of authorizing and sends data; Node B decodes to the control channel of following in the E-PUCH channel; Obtain transport format information; Data portion is decoded then, and Node B can send mandate according to the buffering area situation continued of UE after on enhancing-hybrid automatic repeat request indication channel (E-HICH) channel, returning correct/error (ACK/NACK) information.

In the version before the Rel-7, the transfer of data under the CELL_FACH state is based upon on the common signal channel, and upstream data transmits on RACH (RACH) transmission channel, and is mapped on Physical Random Access Channel (PRACH) physical channel; Downlink data transmits on forward access channel (FACH) transmission channel, and is mapped on Secondary Common Control Physical Channel (S-CCPCH) physical channel.

CELL_FACH state after the enhancing, up channel can also can use the E-DCH channel based on traditional RACH and PRACH channel, and under be about to through HS-DSCH and HS-PDSCH Channel Transmission.Information such as HS-SCCH channel, H-RNTI channel are broadcasted in cell system information, because these H-RNTI are shared by the UE in the sub-district, thereby are called public H-RNTI.When UE initiates connection request from Idle state, use the public H-RNTI in the cell system message to intercept the HS-SCCH channel.After UE gets into connection status; When radio network controller (RNC) disposes the DTCH/DCCH channel for UE, the H-RNTI of configure dedicated, UE is after possessing special-purpose H-RNTI; Use special-purpose H-RNTI to receive the HS-SCCH channel, do not receive and do not re-use public H-RNTI; If the RNC decision is mapped to the uplink of UE on the E-DCH, RNC also can be the E-RNTI of UE configure dedicated.

(for example, based on the scheduling of Node B, HARQ etc.) can effectively be improved data transfer rate because a series of enhancement techniques of HSPA technology itself, thereby further then can significantly improve signaling delay and data transfer rate under the CELL_FACH state.TDS-CDMA system (TD-SCDMA) also considers to carry out similar enhancing.

TD-SCDMA is a synchro system, when introducing any business, all need consider stationary problem.When carrying out the HS-DSCH transmission; This a pair of channel of HS-SCCH and HS-SICH itself can constitute closed power control and synchronous control system; As shown in Figure 3; Wherein S301 has represented the HS-SCCH channel, on this channel, carries transmitting power control (TPC) order and simultaneous bias (SS) order, is respectively applied for the closed power control and the uplink synchronous control of up HS-SICH channel; S302 represents the HS-SICH channel, and the TPC order that it carries is used to control the transmitted power of HS-SCCH.

When E-DCH transmitted, E-AGCH channel and E-PUCH interchannel also had power control and Synchronization Control, ascending power emission and the simultaneous bias of TPC on the E-AGCH channel and SS order control E-PUCH.

Also have the special-purpose channel maintaining uplink Synchronization Control of following at the CELL_DCH state, pause even scheduling occurred, HS-SICH or E-PUCH can remain on synchronous regime by the uplink synchronous skew of following channel.Under the CELL_FACH state, under the situation that descending HS-DSCH dispatches continuously, the last synch command of HS-SCCH can make the HS-SICH channel remain on synchronous regime; Under the situation that up E-DCH dispatches continuously, the last synch command of E-AGCH can make the E-PUCH channel remain on synchronous regime; The HS-SICH of UE and E-PUCH channel also can be mutually with reference to simultaneous bias in addition.

In addition, when the scheduling pause appears in the up E-DCH of UE,, can at this moment, can follow the foundation of a uplink synchronous through inserting the application resource at random if UE has data to need to send; When the up use PRACH channels transmit of UE, each emission of UE all can follow uplink synchronous to set up process.

In existing system, it is as shown in Figure 4 that uplink synchronous is set up process: S401, and UE sends ascending pilot frequency sign indicating number SYNC_UL at ascending pilot channel (UpPCH); After S402, NodeB detect this synchronous code, on rapid physical acknowledgement channel (FPACH) channel of correspondence, send confirmation, wherein have uplink synchronous skew indication, open loop power information etc.;

Under the CELL_FACH state, UE does not have other dedicated channels, pauses if transmission appears in uplink and downlink simultaneously; When the descending recovery of UE was transmitted after pausing, UE may lose uplink synchronous, and the HS-SICH channels transmit under desynchronizing state can produce larger interference to other user of sub-district; The base station also can't accurately receive signal; But, regain synchronously, must initiate the uplink synchronous process.

Ascending pilot channel is a competitive channel, and UE generally will just possibly send success through repeatedly attempting, and therefore, process shown in Figure 4 possibly experience the long time.When the downlink transfer of UE is recovered transmission after pause after a while; UE possibly be in the uplink loss state; If Node B is through HS-SCCH channel dispatch UE; Also carry out same uplink synchronous before the UE transmission HS-SICH and set up process, can't guarantee so on HS-SICH, to send HARQ affirmation and CQI report, to such an extent as to the feedback that causes Node B can't discern HS-SICH to which time HS-DSCH is transmitted according to set timing.

But, can overcome the above problems through certain methods, for example; Node B judges that before the downlink transfer of UE is recovered UE possibly be in the state of uplink loss; Node B initiates uplink synchronous with proactive notification UE and sets up, though signaling consumption and time delay are arranged like this, reliable.But, because the Node B under the CELL_FACH state does not have the contextual information of UE, still can there be some problems.As stated, when UE up transmitted on E-DCH, after up pause a period of time; And before UE has new data to transmit again; UE can initiatively initiate uplink synchronous and set up process, in case accomplished uplink synchronous, up timing information just can be used for the HS-SICH channel; If this moment, Node B notice UE initiated will cause extra signaling consumption synchronously.

But because the Node B under the CELL_FACH state does not have the contextual information of UE, Node B is in H-RNTI of scheduling; And do not know the uplink situation of this UE; Thereby before after a period of time is interrupted in the HS-DSCH of UE transmission, restarting, Node B then thinks is enough to cause the UE step-out this break period, and UE maybe be because initiating a uplink be in synchronous regime in the recent period; Like this, just possibly cause extra signaling consumption and time delay.

In addition; Some losing of signaling of control also possibly caused the cognitive different of Node B side and UE side; Such as Node B UE has been initiated HS-SCCH scheduling, and UE receives not, after Node B a period of time during to this UE transmission; Can think that the distance of recent HS-SCCH transmission is not enough to cause the UE uplink loss, and UE side actual capabilities have been in the uplink loss state.

The CELL_FACH state towards service feature be small data quantity, the business that discontinuity is arranged, professional like web browsing, E-mail, in descending transmission, have no progeny when recovering transmission, how setting up uplink synchronous fast is a urgent problem.Yet, the technical scheme that addresses the above problem is not proposed at present as yet.

Summary of the invention

Consider the problems referred to above and make the present invention, for this reason, main purpose of the present invention is to provide a kind of uplink synchronous implementation method, to solve the problem of setting up uplink synchronous in the relevant issues fast.

According to one embodiment of present invention, a kind of uplink synchronous implementation method is provided, has been used under cell forward access channel status, setting up uplink synchronous in user equipment side.

Uplink synchronous implementation method according to the embodiment of the invention comprises: the base station confirms that subscriber equipment carries out the employed channel of uplink; Under the situation of the channel of confirming for the enhancing dedicated channel; Whether the base station is in the uplink synchronous state according to the uplink and the downlink transfer situation judges equipment of subscriber equipment, and subscriber equipment is carried out dispatch of down going sharing channel in high speed being judged as under the situation that is; Otherwise notifying user equipment is carried out uplink synchronous; Channel confirming is under the situation of RACH, and dispatch of down going sharing channel in high speed is directly carried out to subscriber equipment in the base station; Perhaps whether the base station is in the uplink synchronous state according to the downlink transfer situation judges equipment of subscriber equipment, and carries out uplink synchronous at not the situation of the being judged as subscriber equipment that sends a notice.

In addition, receive from radio network controller in the base station under the situation of contextual information of subscriber equipment, the base station confirms that it is to strengthen dedicated channel that subscriber equipment carries out the channel that uplink uses; Do not receive in the base station under the situation of contextual information of subscriber equipment, the base station confirms that subscriber equipment carries out the channel that uplink uses and is RACH.

In addition; Confirm that in the base station subscriber equipment uses the enhancing dedicated channel to carry out under the situation of uplink; Whether the dead time of uplink of base station judges subscriber equipment and downlink transfer is all less than the predetermined thresholding that keeps synchronously; Confirm that subscriber equipment is in the uplink synchronous state being judged as under the situation that is, otherwise confirm that subscriber equipment is in the uplink loss state.

Wherein, confirm that in the base station subscriber equipment is under the situation of uplink loss state, further comprises: the base station is sent to subscriber equipment and is set up signaling synchronously; In response to setting up signaling synchronously, subscriber equipment judges whether itself is in the uplink synchronous state, and returns the confirmation of synchronization signaling to the base station being judged as under the situation that is; Otherwise subscriber equipment carries out uplink synchronous to be set up, and after successfully setting up, returns the confirmation of synchronization signaling to the base station.

In addition; Confirm that in the base station subscriber equipment uses RACH to carry out under the situation of uplink; The base station judges subscriber equipment carries out the dead time of downlink transfer whether less than the predetermined thresholding that keeps synchronously, and confirms under the situation that is that subscriber equipment is in the uplink synchronous state being judged as; Otherwise confirm that subscriber equipment is in the uplink loss state.

Wherein, Subscriber equipment judges that the processing that itself whether is in the uplink synchronous state is specially: subscriber equipment is confirmed the time interval of its last uplink apart from the current time; Under the situation of the time interval less than the predetermined thresholding of maintenance synchronously, subscriber equipment is judged the uplink synchronous state that itself is in; Otherwise judge the uplink loss state that itself is in.

Wherein, the base station is specially the processing that subscriber equipment carries out dispatch of down going sharing channel in high speed: the dispatch that the base station will be used to initiate dispatch of down going sharing channel in high speed sends to subscriber equipment; In response to dispatch; Subscriber equipment judges whether itself is in the uplink synchronous state; And under situation about not being judged as not, carry out uplink synchronous and set up; Wherein, if uplink synchronous is set up before the feedback timing arrives of high-speed shared indication channel, then subscriber equipment mixes the feedback of automatic repeat requests and channel quality indication at high-speed shared indication channel; Otherwise subscriber equipment is proceeded uplink synchronous and is set up.

Wherein, contextual information comprises: fast wireless network temporary mark and enhancing Radio Network Temporary Identifier.

In addition, above-mentioned uplink is meant that strengthening dedicated channel transmits; Above-mentioned downlink transfer is meant the high speed descending sharing channel transmission.

Through technique scheme of the present invention, can reduce the probability of Node B to the synchronous regime erroneous judgement of UE, the uplink synchronous of UE is set up made optimization, avoided extra saving signaling consumption, reduced the downlink transfer time delay of Node B.

Other features and advantages of the present invention will be set forth in specification subsequently, and, partly from specification, become obvious, perhaps understand through embodiment of the present invention.The object of the invention can be realized through the structure that in the specification of being write, claims and accompanying drawing, is particularly pointed out and obtained with other advantages.

Description of drawings

Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used to explain the present invention with embodiments of the invention, is not construed as limiting the invention.In the accompanying drawings:

Fig. 1 is the concrete signaling content sketch map of correlation technique high speed shared control channel;

Fig. 2 be in the correlation technique under the cell dedicated channel status high speed descending sharing channel send sketch map;

Fig. 3 is closed power control and a synchronous control system sketch map in the correlation technique;

Fig. 4 is that uplink synchronous is set up the process sketch map in the correlation technique;

Fig. 5 is the flow chart according to the uplink synchronous implementation method of the embodiment of the invention;

Fig. 6 is the flow chart according to the detailed process process of the uplink synchronous implementation method of the embodiment of the invention;

Fig. 7 is according on High-Speed Shared Control Channel, carrying the sketch map of setting up the signaling content of order synchronously in the method for the embodiment of the invention; And

Fig. 8 is the sketch map according to the enhanced random access channel of the embodiment of the invention.

Embodiment

Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for explanation and explains the present invention, and be not used in qualification the present invention.

In the present embodiment, a kind of uplink synchronous implementation method is provided, has been used under cell forward access channel status (that is CELL_FACH state), setting up uplink synchronous in user equipment side.Fig. 5 is the flow chart according to the uplink synchronous implementation method of the embodiment of the invention.

As shown in Figure 5, comprise according to the uplink synchronous implementation method of the embodiment of the invention: step S502, Node B confirm that subscriber equipment (UE) carries out the employed channel of uplink; Step S504; Under the situation of the channel of confirming for the enhancing dedicated channel; Whether Node B simultaneously is in the uplink synchronous state according to up E-DCH transmission situation and the descending HS-DSCH transmission situation judges equipment of UE, and subscriber equipment is carried out dispatch of down going sharing channel in high speed being judged as under the situation that is; Otherwise notifying user equipment is carried out uplink synchronous; Step S506 is under the situation of RACH at the channel of confirming, Node B directly carries out dispatch of down going sharing channel in high speed to subscriber equipment; Perhaps whether Node B is in the uplink synchronous state according to the descending HS-DSCH transmission situation judges equipment of UE, and carries out uplink synchronous at the situation not that the is judged as subscriber equipment that sends a notice.

In the up E-DCH transmission, UE may initiate dispatch request earlier through the E-RUCCH channel, and follow the foundation of uplink synchronous this moment, and UE is in synchronous regime; Perhaps UE is directly through the E-PUCH transmission, and this moment, UE was in synchronous regime.If thereby Node B knows that UE had the E-DCH transmission in a period of time recently, and is successful E-DCH transmission, UE will be in synchronous regime so.In the descending HS-DSCH transmission, UE can pass through HS-SICH channel feedback HARQ and CQI, if Node B receives HS-SICH channel and the correct decoding of UE, just means that UE is in synchronous regime.Thereby uplink that NodeB can be through UE and downlink transfer are judged UE and whether are in the uplink synchronous state.

Particularly, contextual information comprises: fast wireless network temporary mark (H-RNTI is corresponding to context information) and enhancing Radio Network Temporary Identifier (E-RNTI is corresponding to preceding text information).When the up use E-DCH of UE transmitted, RNC was with the E-RNTI of UE and the related information notice Node B of H-RNTI, and Node B can understand up E-DCH transmission and the descending HS-DSCH transmission situation of a UE like this.Before Node B carries out the HS-DSCH transmission to UE,,, notify this UE to initiate uplink synchronous if judge that UE is in desynchronizing state according to the uplink synchronous state that up E-DCH transmission and the descending HS-DSCH transmission situation of this UE are judged UE.

And when the up use RACH of UE transmitted, before Node B carried out the HS-DSCH transmission to UE, dual mode is arranged: first kind, Node B always thought that UE is in the uplink synchronous state, directly carried out the HS-DSCH scheduling; Second kind, Node B only judges the uplink synchronous state of UE according to the descending HS-DSCH transmission situation of UE, if judge that UE is in desynchronizing state, notifies this UE to initiate uplink synchronous.Wherein, Node B notifies this UE to initiate uplink synchronous through physical layer signaling, and said synchronization notice signaling comprises the H-RNTI of synchronization notice signaling sign and UE at least in the HS-SCCH channel.Because Node B can't understand the up RACH transmission situation of UE, more than 2 kinds of processing that method all is a kind of compromise.

Like this, receive from radio network controller at Node B under the situation of contextual information of subscriber equipment, Node B confirms that it is to strengthen dedicated channel that subscriber equipment carries out the channel that uplink uses; Do not receive at Node B under the situation of contextual information of subscriber equipment, Node B confirms that subscriber equipment carries out the channel that uplink uses and is RACH.

In addition; Confirm that at Node B subscriber equipment uses the enhancing dedicated channel to carry out under the situation of uplink; Whether the dead time of up E-DCH transmission of Node B judges equipment and descending HS-DSCH transmission is all less than the predetermined thresholding that keeps synchronously; Confirm that subscriber equipment is in the uplink synchronous state being judged as under the situation that is, otherwise confirm that subscriber equipment is in the uplink loss state.

Wherein, confirm that at Node B subscriber equipment is under the situation of uplink loss state, further comprises: Node B sends to subscriber equipment and sets up signaling synchronously; In response to setting up signaling synchronously, subscriber equipment judges whether itself is in the uplink synchronous state, and returns the confirmation of synchronization signaling to Node B being judged as under the situation that is; Otherwise subscriber equipment carries out uplink synchronous to be set up, and after successfully setting up, returns the confirmation of synchronization signaling to Node B.

In addition, confirm that at Node B subscriber equipment uses RACH to carry out under the situation of uplink, when subscriber equipment is initiated the HS-DSCH transmission, always think that subscriber equipment is in the uplink synchronous state.Perhaps Node B judges equipment carry out descending HS-DSCH transmission dead time whether less than the predetermined thresholding that keeps synchronously, and confirm under the situation that is that subscriber equipment is in the uplink synchronous state being judged as; Otherwise confirm that subscriber equipment is in the uplink loss state.

Wherein, Subscriber equipment judges that the processing that itself whether is in the uplink synchronous state is specially: subscriber equipment is confirmed the time interval of its last uplink apart from the current time; Under the situation of the time interval less than the predetermined thresholding of maintenance synchronously, subscriber equipment is judged the uplink synchronous state that itself is in; Otherwise judge the uplink loss state that itself is in." uplink " implication described herein is wider; Can comprise the transmission of the up channel that all are relevant with UE, comprise: the successful transmission of SYNC_UL (receiving the affirmation of FPACH), E-RUCCH transmission, PRACH transmission, E-PUCH transmission, HS-SICH transmission etc.

Uplink described in step S504 and the step S506 is meant and strengthens the dedicated channel transmission that downlink transfer is meant the high speed descending sharing channel transmission.

Processing procedure according to above-mentioned that is to say, under Node B receives from the situation after the upper and lower civilian information of the UE of RNC, thinks that then UE's is up through the E-DCH transmission.When the HS-DSCH of UE transmits after transmission pause after a while; When recovering transmission; Node B judges that the up E-DCH of UE and time that descending HS-DSCH transmission pauses simultaneously are when keeping thresholding synchronously; Think that UE is in the uplink loss state, notify this UE to initiate uplink synchronous through physical layer signaling.Above-mentioned synchronous maintenance thresholding is the patient maximum uplink dead time of uplink synchronous, is Node B configuration by high level.Certainly, Node B judgement also relates to more optimization, and for example, Node B should transmit as basis for estimation with successful HS-SICH with the last successful E-DCH transmission of UE.Unsuccessful transmission possibly be because UE is in the uplink loss state.

If Node B judges that UE is a step-out, then can send and set up signaling synchronously to UE; UE receive Node B set up signaling synchronously after, judge whether self is in the uplink synchronous state, being judged as under the situation that is, directly feed back the confirmation of synchronization signaling to Node B through physical layer control channel 1; If be in the uplink loss state, then initiate uplink synchronous and set up process, after the completion, feed back the confirmation of synchronization signaling to Node B through physical layer control channel 2; Afterwards, receive the confirmation of synchronization signaling of UE at Node B after, recover HS-DSCH scheduling to this UE.

Wherein, when keeping thresholding synchronously, think when UE is in the uplink synchronous state, directly this UE is carried out the HS-DSCH scheduling if Node B judges the up E-DCH of UE and time that descending HS-DSCH transmission pauses simultaneously.Certainly, Node B judgement also relates to more optimization, and for example, Node B should transmit as basis for estimation with successful HS-SICH with the last successful E-DCH transmission of UE.Unsuccessful transmission possibly be because UE is in the uplink loss state.

Do not have at Node B under the situation of upper and lower civilian information of UE, Node B acquiescence UE carries out uplink through the RACH channel.When the HS-DSCH of UE transmission recovered transmission after transmission pause after a while, a kind of method was that Node B acquiescence UE is in the uplink synchronous state, directly this UE is carried out the HS-DSCH scheduling.

After UE receives the dispatch of Node B, judge self to be in the uplink synchronous state, receive corresponding HS-DSCH transfer of data, and carry out up feedback; Judge the uplink loss state that self is in, initiate uplink synchronous and set up process that when before the HS-SICH feedback regularly arrives, UE has accomplished uplink synchronous foundation, then on corresponding HS-SICH, carry out HARQ and CQI feedback; If when the HS-SICH feedback regularly arrived, UE did not also accomplish uplink synchronous and sets up, then do not carry out the feedback of HS-SICH, proceed to set up synchronously process.This moment, Node B can think that UE does not receive success, according to circumstances can initiate retransfer scheduling.

Because Node B does not have the upper and lower civilian information of UE, Node B acquiescence UE carries out uplink through the RACH channel.When the HS-DSCH of UE transmission pauses the back when recovering transmission through after a while transmission, when another kind of method is Node B descending HS-DSCH transmission dead time of judging UE greater than maintenance thresholding synchronously, notify this UE initiation uplink synchronous through physical layer signaling.Here, keeping thresholding synchronously is the patient maximum uplink dead time of uplink synchronous, is Node B configuration by high level; Certainly, Node B judgement also relates to more optimization, and for example Node B should transmit as basis for estimation with the last successful HS-SICH of UE.Unsuccessful transmission possibly be because UE is in the uplink loss state.

UE receive Node B set up signaling synchronously after, judge the uplink synchronous state that self is in, directly feed back the confirmation of synchronization signaling through physical layer control channel 1 to Node B; If be in the uplink loss state, then initiate uplink synchronous and set up process, after the completion, feed back the confirmation of synchronization signaling to Node B through physical layer control channel 2.

After Node B receives the confirmation of synchronization signaling of UE, recover HS-DSCH scheduling to this UE.

Wherein, smaller or equal to keeping thresholding synchronously, then think when UE is in the uplink synchronous state, directly this UE is carried out the HS-DSCH scheduling if Node B judges time that the downlink transfer of UE pauses.

And in the method, Node B is specially the processing that subscriber equipment carries out dispatch of down going sharing channel in high speed: the dispatch that Node B will be used to initiate dispatch of down going sharing channel in high speed sends to subscriber equipment; In response to dispatch; Subscriber equipment judges whether itself is in the uplink synchronous state; And under situation about not being judged as not, carry out uplink synchronous and set up; Wherein, if uplink synchronous is set up before the feedback timing arrives of high-speed shared indication channel, then subscriber equipment mixes the feedback of automatic repeat requests and channel quality indication at high-speed shared indication channel; Otherwise subscriber equipment is proceeded uplink synchronous and is set up.

That is to say, preferably, in above-mentioned all processing procedures, receive the dispatch of NodeB as UE after, all need judge, receive corresponding HS-DSCH transfer of data, and carry out up feedback when self being in the uplink synchronous state when judging; Judge the uplink loss state that self is in, initiate the uplink synchronous process.When before the HS-SICH feedback regularly arrives, UE has accomplished uplink synchronous foundation, then on corresponding HS-SICH, feeds back; If when the HS-SICH feedback regularly arrived, UE did not also accomplish uplink synchronous and sets up, then do not carry out the feedback of HS-SICH, proceed to set up synchronously process.

UE judges and self to be in synchronously or the method for desynchronizing state is: the last uplink of current distance when uplink synchronous keeps thresholding, think it oneself is uplink loss; The time interval of the last uplink of current distance thinks it oneself is uplink synchronous when keeping thresholding smaller or equal to uplink synchronous." uplink " implication described herein is wider; Can comprise the transmission of the up channel that all are relevant with UE, comprise: the successful transmission of SYNC_UL (receiving the affirmation of FPACH), E-RUCCH transmission, PRACH transmission, E-PUCH transmission, HS-SICH transmission etc.

Wherein, physical layer control channel 1 with HS-SICH channel that the HS-SCCH that sets up signaling place synchronously is associated on carry; Physical layer control channel 2 using system Physical Random Access Channel resources are transmitted, and comprise synchronous foundation at least and accomplish relevant indication, the sign H-RNTI information of user terminal;

Below, will combine accompanying drawing, and be that example describes above-mentioned processing procedure with the TD-SCDMA system.Fig. 6 is the flow chart according to the uplink synchronous implementation method detailed process process of the embodiment of the invention.

As shown in Figure 6, in the TD-SCDMA system, carry out according to the detailed process process of the uplink synchronous implementation method of the embodiment of the invention following:

Step S601, before after the HS-DSCH of UE transmission has paused a period of time, recovering again to transmit, Node B need judge the uplink synchronous state of UE, so that determine next step processing;

Wherein, Node B judges that the method for UE uplink synchronous or step-out is: when the up use E-DCH of UE transmits; RNC is with the E-RNTI of UE and the related information notice Node B of H-RNTI, and this incidence relation can be notified Node B through 2 kinds of approach: the H-RNTI of the agreement UE of system is identical with E-RNTI; RNC brings Node B through Iub mouth user plane HS-DSCH Frame Protocol with the E-RNTI of UE.Before after the HS-DSCH of UE transmission has paused one period dead time, recovering transmission again, Node B judges when the up E-DCH transmission of this UE and the time that descending HS-DSCH transmission pauses simultaneously keep thresholding greater than uplink synchronous, thinks that UE is in the uplink loss state; When the up E-DCH of this UE transmission time that transmission pauses simultaneously with descending HS-DSCH during, think that UE is in the uplink synchronous state smaller or equal to maintenance thresholding synchronously.Certainly, these also relate to more optimization in judging, for example, Node B judges whether UE is in when synchronous, should transmit as basis for estimation with the last successful E-DCH transmission of UE and successful HS-SICH.

When Node B did not have the up-downgoing transmission related information of UE, Node B thought up the uses RACH Channel Transmission of UE, and Node B has 2 kinds of determination methods at this moment: first kind, always think that UE is in the uplink synchronous state; Second kind, only judge the uplink synchronous situation of UE according to the descending HS-DSCH transmission situation of UE: when descending transmission dead time during greater than maintenance thresholding synchronously, Node B thinks that UE is in the uplink loss state; When time that the downlink transfer of this UE is paused when keeping thresholding synchronously, think that UE is in the uplink synchronous state; Certainly, these also relate to more optimization in judging, judge that such as Node B whether UE is in when synchronous, should transmit as basis for estimation with the last successful HS-SICH of UE.

Step S602, when Node B judged that UE is in desynchronizing state, Node B set up uplink synchronous through physical layer signaling notice UE;

The physical layer signaling that is used for notifying UE to set up uplink synchronous that Node B sends does not exist at existing system; In order farthest to reduce influence to system; This physical layer signaling can pass through the HS-SCCH Channel Transmission; Whether the receive mode that UE presses HS-SCCH in the existing system receives, discern this HS-SCCH through the H-RNTI in the Cyclic Redundancy Check field in the detection HS-SCCH channel and send out to oneself.Existing HS-SCCH signaling content is as shown in Figure 1, and this is once common HS-SCCH transmission or sets up order synchronously to need a special field indication.A kind of method is: the code channel field is carried out special filling in.

In existing systems; In the code channel field of 8 bits; Preceding 4 bits are represented position, initial code road, afterwards 4 bits are represented position, stop code road; Preceding 4 bit values must be smaller or equal to back 4 bits, and such as 00000000 expression HS-PDSCH channel occupancy, 0 number road, 00000010 expression takies totally 3 code channels No. 0 to No. 2.During 4 bit values, existing UE can think that this is an exceptional signaling, can abandon to current 4 bit values greater than the back; And we just in time can utilize this point to expand, that is, current 4 bits are greater than the back during 4 bits; It is a special signaling that UE should resolve to this; Further, system can represent to set up synchronously order to special bit pattern of code channel field agreement, such as 11110000; The H-RNTI information of in cyclic redundancy check field, still carrying UE is so that UE receives; All the other fields are as keeping the position, and can all fill out is 0 or 1.

Fig. 7 is the sketch map of the signaling of on HS-SCCH, carrying foundation order synchronously described in the present invention.Fig. 7 shows HS-SCCH and goes up carrying and set up command context synchronously, and wherein, preceding 4 bit values other bit pattern during greater than back 4 bit values can keep as other expansion; And preceding 4 bits are smaller or equal to the back during 4 bits, and UE should think that this is a common HS-DSCH control channel.

Step S603, Node B judge when UE is in the uplink synchronous state, and this UE is carried out the HS-DSCH scheduling, and the HS-DSCH transmission course of its process and existing system is consistent;

Step S604, UE receive Node B set up notice signaling synchronously after, need to judge whether oneself really is in the uplink synchronous state that loses.This is because the judgement of Node B maybe be inconsistent with the virtual condition of UE; Mainly show: during the up employing of UE E-DCH transmission; All transmission that Node B can grasp UE basically dynamically; If just in time transfer of data is arranged and when having initiated uplink synchronous and setting up, UE can think oneself to be in synchronous regime after receiving the synchronous foundation order of Node B but UE this moment is up; In the up employing of UE RACH when transmission,, Node B does not have the uplink information of UE, and this moment, Node B possibly be different with UE to the cognition of uplink synchronous state fully.

UE judges and to lay oneself open to the uplink loss state, then initiates uplink synchronous and sets up process, and wherein UE judges that the method that lays oneself open to desynchronizing state is: the last uplink of current distance keep thresholding interval greater than uplink synchronous." uplink " implication described herein is wider; Can comprise the transmission of the up channel that all are relevant with UE, comprise: the successful transmission of SYNC_UL (receiving the affirmation of FPACH), E-RUCCH transmission, PRACH transmission, E-PUCH transmission, HS-SICH transmission etc.

UE uses the uplink synchronous process of existing system to select suitable uplink synchronous code, in the UpPCH subchannel that allows, sends uplink synchronous code and receives the affirmation information on the FPACH.

Between UE and Node B, need an affirmation mechanism, make Node B know whether the synchronizing process of UE is accomplished, so that Node B recovers the transfer of data to this UE as early as possible.A kind of method is that UE passes through physical layer signaling explicit notification Node B uplink synchronous foundation completion.Because Node B need discern concrete user, carries the H-RNTI information of UE in this physical layer signaling at least.The bearing mode of this physical layer signaling can be used for reference enhanced random access channel (E-RUCCH) channel in the existing HSUPA system.The E-RUCCH channel is a physical layer control channel; Carry dispatch request information; With the random access resource in the traditional P RACH channel sharing sub-district, make that through dividing different uplink synchronous codes NodeB can distinguish conventional P RACH access or E-RUCCH inserts.Carry the RACH transmission channel on the PRACH channel; This transmission channel ends at master control radio network controller (CRNC); Node B need not resolve data wherein after receiving the PRACH channel, directly gives radio network controller (RNC) through Iub mouth (interface between a kind of Node B and the RNC) Frame Protocol with the data forwarding that receives; E-RUCCH channel bearing physical layer control command, Node B need resolve signaling content wherein.In order to reduce influence, can on the E-RUCCH channel, carry to set up synchronously and accomplish signaling system.

The signaling of existing enhanced random ascending control channel (E-RUCCH) is as shown in Figure 8; Need clearly identify so that Node B discerns this equally to the signaling of E-RUCCH is that order is accomplished in a dispatch request or a foundation synchronously; Preferably; The simplest identification method is to distinguish through the crc field of E-RUCCH, when the CRC of the E-RUCCH that receives as Node B is common CRC coding, thinks that this is a dispatch request; (1 becomes 0 when the bit polarity inversion among the CRC; 0 becomes 1), think to set up synchronously for one and accomplish order.

Accomplish order for synchronous foundation, the H-RNTI information that should fill in UE in last the information field UE sign among the E-RUCCH, all the other information fields can be filled out and be complete 0 or complete 1; Another kind method also can utilize E-RUCCH to go up the special mode of filling in of existing field; Make Node B know that this is a special signaling; For example: it is 0 that the buffer state field is filled out, as long as and have one just can represent that this is a special signaling for non-0 in 4 bits of highest priority logical channel data to be transferred amount.Afterwards, utilize remaining bit (for example, highest priority logical channel number) again, expand the implication of special signaling, in this instance as long as utilize a kind of value wherein just can represent to have set up the completion signaling synchronously.

In case Node B begins to recover the scheduling to this UE after receiving the synchronous foundation order of UE, sending the HS-SCCH signaling on the suitable time and on the sequential of system's regulation, sending HS-PDSCH;

Step S605; UE receive Node B set up signaling synchronously after; Subscriber equipment is judged when laying oneself open to the uplink synchronous state; On the HS-SICH channel, reply the confirmation of synchronization signaling to Node B, the HS-SCCH channel-associated at this HS-SICH channel and synchronization notice order place, this moment, UE sent the ACK signaling.Node B recovers scheduling and transmission to the HS-DSCH of subscriber equipment after receiving the affirmation signaling.Wherein, UE judges that the method that lays oneself open to synchronous regime is: the time interval of the last uplink of current distance keeps thresholding smaller or equal to uplink synchronous; " uplink implication " described herein is relatively wider; Can comprise the transmission of the up channel that all are relevant with UE, comprise: the successful transmission of SYNC_UL (receiving the affirmation of FPACH), E-RUCCH transmission, PRACH transmission, E-PUCH transmission, HS-SICH transmission etc.

After step S606, UE receive the HS-SCCH dispatch, judge to lay oneself open to the uplink loss state, then initiate uplink synchronous and set up process.Wherein UE judges that the method lay oneself open to desynchronizing state is: the last uplink of current distance keep thresholding interval greater than uplink synchronous;

Uplink synchronous process when the UE judgement lays oneself open to desynchronizing state may further comprise the steps: UE uses the uplink synchronous process of existing system to select suitable uplink synchronous code, in the UpPCH subchannel that allows, sends uplink synchronous code and receives the affirmation information on the FPACH; Simultaneously, UE also need receive this HS-DSCH transmission; If FPACH receives that before HS-SICH feedback time point UE feeds back this HS-DSCH reception carrying out HARQ feedback and CQI so on relevant HS-SICH; If when the HS-SICH feedback time arrives, also successfully do not receive FPACH, UE does not carry out the feedback of HARQ and CQI, continues synchronizing process;

After step S607, UE receive the HS-SCCH dispatch, judge to lay oneself open to the uplink synchronous state, then receive follow-up HS-DSCH transmission, and on corresponding sequential, on HS-SICH, carry out HARQ feedback and CQI feedback.UE judges that the method that lays oneself open to synchronous regime is: the time interval of the last uplink of current distance keeps thresholding smaller or equal to uplink synchronous;

It is the patient maximum uplink dead time of uplink synchronous that uplink synchronous keeps thresholding, is Node B and UE configuration by high level.In existing physical layer specification, uplink synchronous sense cycle length is 160ms, and keeping patient maximum uplink service general recommendations break period of synchronous institute is 80ms, because these values and technical scheme of the present invention are irrelevant, so describe no longer one by one.

In addition; Send for fear of the synchronous foundation order of Node B and to lose or the confirmation of synchronization signaling of UE is lost; System need be provided with one and set up timer T synchronously; Node B sends synchronous foundation order back and starts timer T on HS-SCCH, if the overtime confirmation of synchronization signaling of also not receiving UE of T, Node B needs to initiate to set up synchronously again notification procedure.When UE reported the confirmation of synchronization signaling through HS-SICH, the fixed time interval between HS-SCCH and the HS-SICH was confirmable, and UE is when reporting confirmation of synchronization through E-RUCCH, rely on up access load condition in the sub-district and decided.Thereby the value of timer T will be confirmed according to the average collision probability and the average time of fixed time interval between HS-SCCH and the HS-SICH and uplink random access.

In sum; The present invention is through making UE and Node B bear the synchronous regime that a part of control is judged UE; By means of technical scheme of the present invention, can reduce the probability of NodeB to the synchronous regime erroneous judgement of UE, the uplink synchronous of UE is set up made optimization; Avoid extra saving signaling consumption, reduced the downlink transfer time delay of Node B.

Be merely the preferred embodiments of the present invention with on said, be not limited to the present invention, for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. a uplink synchronous implementation method is used under cell forward access channel status, setting up uplink synchronous in user equipment side, it is characterized in that said method comprises:

The base station confirms that said subscriber equipment carries out the employed channel of uplink;

Under the situation of the said channel of confirming for the enhancing dedicated channel; Said base station judges according to the uplink situation and the downlink transfer situation of said subscriber equipment whether said subscriber equipment is in the uplink synchronous state, and said subscriber equipment is carried out dispatch of down going sharing channel in high speed being judged as under the situation that is; Otherwise notify said subscriber equipment to carry out uplink synchronous;

Said channel confirming is under the situation of RACH, and dispatch of down going sharing channel in high speed is directly carried out to said subscriber equipment in said base station; Perhaps said base station judges according to the downlink transfer situation of said subscriber equipment whether said subscriber equipment is in the uplink synchronous state, and carries out uplink synchronous at not the situation of the being judged as said subscriber equipment that sends a notice.

2. method according to claim 1; It is characterized in that; Receive from radio network controller in said base station under the situation of contextual information of said subscriber equipment, said base station confirms that it is said enhancing dedicated channel that said subscriber equipment carries out the said channel that uplink uses; Do not receive in said base station under the situation of contextual information of said subscriber equipment, said base station confirms that it is said RACH that said subscriber equipment carries out the said channel that uplink uses.

3. method according to claim 1; It is characterized in that; Confirm that in said base station said subscriber equipment uses said enhancing dedicated channel to carry out under the situation of uplink; Whether the dead time of said subscriber equipment uplink of said base station judges and downlink transfer all less than the predetermined thresholding that keeps synchronously, confirms under the situation that is that said subscriber equipment is in said uplink synchronous state being judged as, otherwise confirms that said subscriber equipment is in the uplink loss state.

4. method according to claim 3 is characterized in that, confirms that in said base station said subscriber equipment is under the situation of said uplink loss state, further comprises:

Said base station is sent to said subscriber equipment and is set up signaling synchronously;

In response to the said signaling of setting up synchronously, said subscriber equipment judges itself whether to be in said uplink synchronous state, and returns the confirmation of synchronization signaling to said base station being judged as under the situation that is; Otherwise said subscriber equipment carries out uplink synchronous to be set up, and after successfully setting up, returns the confirmation of synchronization signaling to said base station.

5. method according to claim 1; It is characterized in that; Confirm that in said base station said subscriber equipment uses said RACH to carry out under the situation of uplink; The said subscriber equipment of said base station judges carries out the dead time of downlink transfer whether less than the predetermined thresholding that keeps synchronously, and confirms under the situation that is that said subscriber equipment is in said uplink synchronous state being judged as; Otherwise confirm that said subscriber equipment is in the uplink loss state.

6. method according to claim 5 is characterized in that, confirms that in said base station said subscriber equipment is under the situation of said uplink loss state, further comprises:

7. according to claim 4 or 6 described methods; It is characterized in that; Said subscriber equipment judges that the processing that itself whether is in said uplink synchronous state is specially: said subscriber equipment is confirmed the time interval of its last uplink apart from the current time; Under the situation of the said time interval less than the said predetermined thresholding of maintenance synchronously, said subscriber equipment is judged the said uplink synchronous state that itself is in; Otherwise judge the said uplink loss state that itself is in.

8. according to each described method in the claim 1 to 6, it is characterized in that said base station is specially the processing that said subscriber equipment carries out said dispatch of down going sharing channel in high speed:

The dispatch that said base station will be used to initiate said dispatch of down going sharing channel in high speed sends to said subscriber equipment;

In response to said dispatch; Said subscriber equipment judges itself whether to be in said uplink synchronous state; And under situation about not being judged as not, carry out uplink synchronous and set up; Wherein, if uplink synchronous is set up before the feedback timing arrives of high-speed shared indication channel, then said subscriber equipment mixes the feedback of automatic repeat requests and channel quality indication at said high-speed shared indication channel; Otherwise said subscriber equipment is proceeded uplink synchronous and is set up.

9. method according to claim 2 is characterized in that, said contextual information comprises: fast wireless network temporary mark and enhancing Radio Network Temporary Identifier.

10. according to each described method in the claim 1 to 6, it is characterized in that said uplink is to strengthen the dedicated channel transmission, said downlink transfer is the high speed descending sharing channel transmission.