CN101478817A

CN101478817A - Method for establishing fast uplink synchronization under non-CELL_DCH status

Info

Publication number: CN101478817A
Application number: CNA2008100650112A
Authority: CN
Inventors: 陈慧; 芮华; 张银成
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2008-01-03
Filing date: 2008-01-03
Publication date: 2009-07-08
Anticipated expiration: 2028-01-03
Also published as: CN101478817B

Abstract

The invention provides a method for establishing a rapid upward synchronization in a non subdistrict dedicated channel state, which comprises following procedures: a procedure S702, during which a user facility is informed by a base station to establish an upward synchronization before transmission of high speed-downlink shared channel of is resumed for a segment of time period; and a procedure S704, during which an upward synchronization process is started when the user facility state is judged to be in an out-of-step state by the user facility itself corresponded with the notification of the base station, and a confirmation signaling is transmitted to the base station after the synchronization is finished; when the user facility is judged to be in the synchronization state, the synchronization confirmation signal is directly replied to the base station by the facility. After the user facility is confirmed to be in the synchronization state by the base station, high speed-downlink shared channel is resumed for the user facility. The method for establishing a rapid upward synchronization in a non subdistrict dedicated channel state can adapt to the spasmodic characteristics of business under a CELL_FACH state, which ensures a rapid establishment of upward synchronization without infecting subsequent business transmission before the transmission is resumed after the business is interrupted for some time.

Description

Under non-CELL _ DCH status, set up the synchronous method of fast uplink

Technical field

The present invention relates to field of wireless communication, relate to more specifically and set up the synchronous method of fast uplink under a kind of non-CELL _ DCH status.

Background technology

3GPP (3G (Third Generation) Moblie partnership) has finished the standardization effort that CELL_FACH (sub-district _ forward access channel) state strengthens in WCDMA (Wideband Code Division Multiple Access (WCDMA) access) system at present.The CELL_FACH state strengthens by introducing the packet data transmission performance that HS-DSCH (high speed descending sharing channel) transmission channel strengthens this state at the CELL_FACH state, makes it obtain less packet transfer delay and higher transmission rate.This mechanism also has been incorporated into paging and the transfer of data under URA_PCH (UTRAN Acceditation Area _ paging channel) and CELL_PCH (cell _ paging channel) state.

In the version before 3GPP Re1-7, the HS-DSCH channel only uses under CELL_DCH (CELL _ DCH) state, network side disposes one group of HS-SCCH (at a high speed-shared control channel) channel and HS-SICH (at a high speed-share indicating channel) channel and H-RNTI (high speed descending sharing channel-Radio Network Temporary Identifier) for UE in advance when setting up the relevant radio bearer of descending HS-DSCH (at a high speed-DSCH Downlink Shared Channel) for UE.This group HS-SCCH/HS-SICH channel is that a plurality of UE share, and H-RNTI is the UE special use, and UE judges by the H-RNTI on the identification HS-SCCH whether this transmission points to oneself.In case detected the HS-SCCH channel that points to oneself, read the information on the HS-SCCH channel, concrete signaling content on the HS-SCCH as shown in Figure 1, HS-PDSCH (high speed down sharing physical channel) channel resource that be about to receive of code channel and gap information indication UE wherein; Modulation system and transport block length indication transformat; The H-RNTI information that contains UE in the cyclic redundancy check field.Behind predetermined timing time nHS-SCCH, UE receives data on the HS-PDSCH of appointment channel, and (mixing automatic repeat requests) feeds back and CQI (channel quality indication) report to carry out HARQ behind the timing nHS-SICH of appointment on the HS-SICH channel.With the TD-SCDMA system is example, and the schematic diagram that a HS-DSCH under the CELL_DCH state sends as shown in Figure 2.

In the version before Re1-7, the transfer of data under the CELL_FACH state is based upon on the common signal channel, and upstream data transmits on RACH (Random Access Channel) transmission channel, and is mapped on PRACH (Physical Random Access Channel) physical channel; Downlink data transmits on FACH (forward access channel) transmission channel, and is mapped on S-CCPCH (Secondary Common Control Physical Channel) physical channel.These configuration of common channel information are all broadcasted in system broadcast message, and UE selects suitable channel to send according to set rule or receives.

CELL_FACH state after the enhancing, up channel also are based on traditional RACH/PRACH channel, and under be about to by the HS-DSCH/HS-PDSCH Channel Transmission.Information such as HS-SCCH channel, H-RNTI 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 enters connection status, when RNC (radio network controller) disposes DTCH/DCCH (Dedicated Traffic Channel/Dedicated Control Channel) channel for UE, the H-RNTI of configure dedicated.UE uses special-purpose H-RNTI to receive the HS-SCCH channel after possessing special-purpose H-RNTI, does not receive and do not re-use public H-RNTI.

The CELL_FACH of WCDMA system state next time the HS-DSCH transmission course as shown in Figure 3, different with the transmission under the CELL_DCH state is, and UE does not need to carry out the HARQ feedback.In case UE detects HS-SCCH and goes up one's own public H-RNTI, to receive HS-PDSCH according to the indication on the HS-SCCH, and the HS-PDSCH data are correctly decoded that the back identifies by the UE in the RRC message or MAC-c (public medium access control) PDU (protocol Data Unit) in U-RNTI come recognition data whether to one's name.The WCDMA system is when design CELL_FACH enhancement techniques, also once wished to have a feedback channel at the CELL_FACH state, can improve the data transmission efficiency of this state so greatly, but the feedback channel that is limited to existing system is a dedicated channel, introduces the operation principle that dedicated channel does not meet the CELL_FACH state; And too slow by PRACH channel feedback speed, can't satisfy actual needs, thereby final conclusion is not carry out up feedback.

Because a series of enhancement techniques of HS-DSCH itself (as based on the scheduling of Node B, HARQ etc.) can effectively improve data transfer rate, thereby will significantly improve signaling delay and data transfer rate under CELL_FACH, CELL_PCH, the URA_PCH state behind the introducing HS-DSCH.TD-SCDMA (TDS-CDMA system) also considers to carry out similar enhancing.HSDPA system and the WCDMA of TD-SCDMA exist some different, and such as in the WCDMA system, uplink HARQ feedback channel is a dedicated channel, and in TD-SCDMA, this channel is a shared channel.Thereby when in the TD-SCDMA system, the CELL_FACH state being strengthened, can consider the HS-SICH channel is introduced this state.

TD-SCDMA is interference-limited synchro system.At the CELL_DCH state, UE is in synchronous hold mode all the time, 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, with Fig. 4 explanation, wherein 402 represent the HS-SCCH channel, on this channel, carried TPC (transmitting power control) order and SS (simultaneous bias) order, be respectively applied for the closed power control and the uplink synchronous control of up HS-SICH channel; 404 represent the HS-SICH channel, and the TPC order of its carrying is used to control the transmitted power of HS-SCCH.At the CELL_DCH state, UE also has the special-purpose channel maintaining uplink Synchronization Control of following, and pauses even scheduling occurred, and HS-SICH can remain on synchronous regime by the uplink synchronous order of other channels of UE.In order to keep uplink synchronous, can not be referred to as uplink synchronous in the present invention and keep thresholding greater than certain thresholding at the transmission interval of the 2 subsynchronous bias orders (SS) of a UE; If greater than this thresholding, may cause the UE uplink loss at the interval of the SS of UE order.Uplink synchronous keep thresholding be subscriber terminal side keep uplink synchronous largest interval time of patient simultaneous bias order SS.Under the CELL_FACH state, under the situation of scheduling continuously, simultaneous bias order SS on the HS-SCCH can make the HS-SICH channel remain on synchronous regime, but if scheduling pauses (promptly, temporary transient pause has appearred in business), and the dead time keep thresholding greater than uplink synchronous, HS-SICH can lose synchronously, HS-SICH emission meeting under the desynchronizing state produces larger interference to other user of sub-district, and the base station is accurate received signal also.Regain synchronously, must initiate the uplink synchronous process, in existing system, a uplink synchronous process of CELL_FACH state as shown in Figure 5:

502:UE sends uplink synchronous code SYNC_UL at ascending pilot channel UpPCH;

After 504:Node B detects this synchronous code, on the FPACH of correspondence (physical access channel) channel, send confirmation, wherein be with uplink synchronous skew indication, open loop power information etc.;

506: after receiving that FPACH confirms, UE selects a PRACH channel, and utilize on the FPACH synchronously, power control information controls the emission of PRACH channel.

Ascending pilot channel is a competitive channel, UE generally will just may send success through repeatedly attempting, and the Transmission Time Interval (TTI) of PRACH channel is grown (generally being 20ms) in the existing synchronizing process, and this channel ends at RNC (non-Node B), thereby the long time of the general experience of process shown in Figure 5.If same method also is incorporated into the CELL_FACH state (that is: when service disconnection is recovered after a period of time to send HS-DSCH, UE also carries out same uplink synchronous process before sending HS-SICH), can't guarantee so on HS-SICH, to send HARQ affirmation and CQI report, and cause Node B can't discern the feedback of HS-SICH at which time HS-DSCH transmission according to set timing.And the PRACH channel ends at RNC, needs this UE of RNC indication Node B to set up synchronously and finishes, and is consuming time longer.The CELL_FACH state towards service feature be small data quantity, the business that discontinuity is arranged, as web browsing, E-mail business, introduce feedback mechanism after, in transmission, have no progeny when recovering transmission, how setting up uplink synchronous fast is a urgent problem.

Therefore, need to set up the synchronous solution of fast uplink under a kind of non-cell private channel status, can solve the problem in the above-mentioned correlation technique.

Summary of the invention

Problem in view of the above, the present invention proposes and set up the synchronous method of fast uplink under a kind of non-CELL _ DCH status, this method is by setting up the synchronous method of fast uplink under the non-CELL _ DCH status, solved the professional transmission problem that how uplink synchronous is set up fast when recovering transmission after a period of time of pausing, made that the HS-DSCH transmission after recovering is unaffected.

May further comprise the steps according to setting up the synchronous method of fast uplink under the non-CELL _ DCH status of the present invention: step S702, before after the high speed-DSCH Downlink Shared Channel of subscriber equipment transmits the one period dead time of having paused, recovering transmission, the base station notifying user equipment is set up uplink synchronous, and step S704, notice in response to the base station, subscriber equipment judges and to initiate the uplink synchronous process when laying oneself open to desynchronizing state, replys the confirmation of synchronization signaling to the base station after finishing uplink synchronous; Subscriber equipment is judged when laying oneself open to synchronous regime, directly to base station answer confirmation of synchronization signaling.

Step 704 also comprises: after the base station confirms that subscriber equipment is in the uplink synchronous state, subscriber equipment is recovered the transmission of high speed-DSCH Downlink Shared Channel.

Wherein, the notifying user equipment step of setting up uplink synchronous in base station comprises that the base station sets up uplink synchronous by the physical layer signaling notifying user equipment.The content of physical layer signaling comprises the indication of synchronous foundation order and the high speed descending sharing channel-Radio Network Temporary Identifier of subscriber equipment at least.Physical layer signaling is carried on the high speed-shared control channel.

Wherein, the dead time keeps thresholding greater than uplink synchronous, promptly subscriber terminal side keep uplink synchronous transmission intercal time of patient maximum simultaneous bias order.This uplink synchronous keeps thresholding by high level configuration or agreement agreement.

Step S704 may further comprise the steps: after subscriber equipment receives physical layer signaling, need judge, when user terminal is found oneself to be in desynchronizing state really, send uplink synchronous code and receive affirmation information on the physical access channel, after receiving the confirmation information, subscriber equipment utilizes physical layer control channel 1 to send the confirmation of synchronization signaling to the base station; When user terminal is found to lay oneself open to synchronous regime, do not carry out the uplink synchronous process, directly send the confirmation of synchronization signaling to the base station by physical layer control channel 2.And after receiving the confirmation signaling, scheduling and the transmission to the high speed-DSCH Downlink Shared Channel of subscriber equipment recovered in the base station.

Wherein, physical layer control channel 1 using system Physical Random Access Channel resource transmission, the content of confirmation of synchronization signaling comprise that at least synchronous foundation finishes the relevant indication and the high speed descending sharing channel-Radio Network Temporary Identifier of subscriber equipment.

Wherein, physical layer control channel 2 uses at a high speed-shares the indicating channel transmission, and the control channel at the synchronization notice order place of this channel and base station is associated, and has definite timing relationship.

This method is by setting up the synchronous method of fast uplink under the non-CELL _ DCH status, wherein setting up order and confirmation of synchronization signaling synchronously all sends by physical layer signaling, these signalings directly end at Node B, thereby can reach best on the speed, solved the problem of can fast quick-recovery transmitting after HS-DSCH transmission under the CELL_FACH state pauses, make HS-DSCH transmission after the pause guarantee on HS-SICH, to send that HARQ confirms and the CQI report according to set timing, make feedback that Node B can discern HS-SICH at be which inferior HS-DSCH transmits.

Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.

Description of drawings

Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:

Fig. 1 is the schematic diagram that illustrates according to the signaling content of the HS-SCCH channel of prior art;

Fig. 2 illustrates according to a HS-DSCH transmission under the CELL_DCH state in the TD-SCDMA system of prior art and the schematic diagram of receiving course;

Fig. 3 illustrates according to the CELL_FACH state transmission of HS-DSCH next time of prior art and the schematic diagram of receiving course;

Fig. 4 is HS-SCCH channel and the closed power control of HS-SICH channel and the schematic diagram of Synchronization Control that illustrates according to prior art;

Fig. 5 is a random access procedure schematic diagram that illustrates according to prior art;

Fig. 6 is the schematic diagram that illustrates according to inserting the signaling information of transmission in the enhancing ascending access system of prior art at random;

Fig. 7 is the flow chart that illustrates according to setting up the synchronous method of fast uplink under the non-CELL _ DCH status of the present invention;

Fig. 8 is a flow chart of setting up the synchronous method of fast uplink under the non-CELL _ DCH status that illustrates according to the embodiment of the invention;

Fig. 9 illustrates the schematic diagram of setting up the method for order according to the existing HS-SCCH Channel Transmission of the relevant utilization of embodiments of the invention synchronously; And

Figure 10 is a data transmission procedure schematic diagram under the CELL_FACH state of the method according to this invention.

Embodiment

Describe embodiments of the invention in detail below in conjunction with accompanying drawing.

Fig. 7 is the flow chart that illustrates according to setting up the synchronous method of fast uplink under the non-CELL _ DCH status of the present invention.With reference to Fig. 7, setting up the synchronous method of fast uplink under non-CELL _ DCH status may further comprise the steps: step S702, recover transmission after the high speed-DSCH Downlink Shared Channel of subscriber equipment transmits the one period dead time of having paused before, the base station notifying user equipment is set up uplink synchronous; And step S704, in response to the notice of base station, subscriber equipment judges and to initiate the uplink synchronous process when oneself being in desynchronizing state really, replys the confirmation of synchronization signaling to the base station after finishing uplink synchronous; Subscriber equipment is judged when laying oneself open to synchronous regime, directly to base station answer confirmation of synchronization signaling.After the base station confirms that subscriber equipment is in the uplink synchronous state, subscriber equipment is recovered the transmission of high speed-DSCH Downlink Shared Channel.

The step that the base station notifying user equipment is set up uplink synchronous may further comprise the steps: uplink synchronous is set up by the physical layer signaling notifying user equipment in the base station.Physical layer signaling comprises the indication of synchronous foundation order and the high speed descending sharing channel-Radio Network Temporary Identifier of subscriber equipment at least.

Wherein, the dead time keeps thresholding greater than uplink synchronous, this thresholding be subscriber terminal side keep uplink synchronous blanking time of patient maximum simultaneous bias order.This uplink synchronous keeps thresholding by high level configuration or agreement agreement.

The physical layer signaling that the base station is set up notice synchronously is carried on the high speed-shared control channel.

Step S704 may further comprise the steps: after subscriber equipment receives physical layer signaling, need judge, when judgement oneself is in desynchronizing state really, send uplink synchronous code and receive affirmation information on the physical access channel, after receiving the confirmation information, subscriber equipment utilizes physical layer control channel 1 to send the confirmation of synchronization signaling to the base station; Subscriber equipment is judged when laying oneself open to synchronous regime, utilizes physical layer control channel 2 directly to reply the confirmation of synchronization signaling to the base station.And after receiving the confirmation signaling, scheduling and the transmission to the high speed-DSCH Downlink Shared Channel of subscriber equipment recovered in the base station.

Physical layer control channel 1 using system Physical Random Access Channel resource is transmitted, and the content in the confirmation of synchronization signaling comprises that at least synchronous foundation finishes the relevant indication and the high speed descending sharing channel-Radio Network Temporary Identifier of subscriber equipment.

Physical layer control channel 2 uses at a high speed-shares indicating channel resource to transmit, and the control channel at the synchronization notice order place of this channel and base station is corresponding one by one, and has definite timing relationship.

The CELL_FACH enhancement techniques also will be incorporated into the TD-SCDMA system, be that example is introduced the present invention with the TD-SCDMA system below.

Fig. 8 is a flow chart of setting up the synchronous method of fast uplink under the non-CELL _ DCH status that illustrates according to the embodiment of the invention.In this embodiment, because TD-SCDMA is a synchro system, when introducing a new business feature, all needs to consider how to carry out uplink synchronous and keep; Losing when synchronous, how to set up uplink synchronous fast.When the HS-DSCH channel was introduced the CELL_FACH state, HS-SCCH and HS-SICH channel itself can constitute a closed loop synchro system, but owing to lack the reference of other dedicated channels, this synchro system can't adapt to the application scenarios of discontinuity business.The present invention is based on as above problem, a kind of creating a mechanism synchronously fast under the CELL_FACH state be provided, be applied in the CELL_FACH enhancement techniques, set up the synchronous method of fast uplink under a kind of non-CELL _ DCH state, may further comprise the steps:

Step S802, the HS-DSCH transmission of UE recovers transmission after pause after a while before, Node B notifies this UE by physical layer signaling, this physical layer signaling is carried on the HS-SCCH channel, comprises the indication of synchronous foundation order, the sign H-RNTI information of user terminal in the physical layer signaling content at least;

Step S804, UE receive and judge after the described signaling when oneself being in desynchronizing state really, initiate the uplink synchronous process, finish uplink synchronous after, subscriber equipment sends the confirmation of synchronization signaling to the base station on system physical accidental access channel; Subscriber equipment judges when laying oneself open to synchronous regime that to base station answer confirmation of synchronization signaling, this HS-SICH channel is associated with the HS-SCCH channel at synchronization notice order place on the HS-SICH channel.And after receiving the confirmation signaling, scheduling and the transmission to the high speed-DSCH Downlink Shared Channel of subscriber equipment recovered in the base station.

Wherein, among the step S802, the dead time more than or equal to keep uplink synchronous maximum break period (be called uplink synchronous and keep thresholding) of patient SS order; This uplink synchronous keeps thresholding by high level configuration or agreement agreement;

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.

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.

Step S804, the uplink synchronous process when the UE judgement lays oneself open to desynchronizing state may further comprise the steps:

Step S804-21, UE sends uplink synchronous code and receives the FPACH channel by existing uplink synchronous process;

Step S804-41, receive that FPACH confirms after, UE sends the confirmation of synchronization signaling by the system physical accidental access channel resource to Node B;

In step S804-4, described confirmation of synchronization signaling comprises the sign H-RNTI information that relevant indication, user terminal are finished in synchronous foundation at least;

Among the step S804, the process when the UE judgement lays oneself open to synchronous regime may further comprise the steps:

UE selects and sets up synchronously the HS-SICH channel of the HS-SCCH channel correspondence at notification command place, and behind the timing slip of determining on this HS-SICH channel the feeding back ACK signaling.

In the method for the invention, when Node B recovered transmission at the downlink data of UE, with the downlink data buffer memory, for the UE uplink synchronous is set aside some time, follow-up like this when carrying out the HS-DSCH transmission, up channel can obtain synchronization shift information, enters synchronous regime.Because the CELL_FACH state is towards non-real-time service, the uplink synchronous process that data are recovered before the transmission is little to the service impact of UE, thereby the method for the invention can solve existing issue.

CELL_FACH strengthens the enhancing that in fact comprises a plurality of states such as CELL_FACH, CELL_PCH, URA_PCH, and present embodiment will be discussed at the CELL_FACH state.In this embodiment, still describe with reference to Fig. 8.

Step S802, the HS-DSCH transmission of UE recovers transmission after pause after a while before, Node B notifies this UE by physical layer signaling.Wherein, shorter when the dead time, when being not enough to cause uplink loss, Node B will directly recover HS-DSCH scheduling and the transfer of data to this UE; Surpass uplink synchronous maintenance thresholding when the dead time, promptly the UE side is kept the patient maximum simultaneous bias order of uplink synchronous institute during blanking time, and Node B need notify UE to set up uplink synchronous before resume data transmission.Wherein, uplink synchronous keeps thresholding to be Node B configuration by the network high level, and UE is given in configuration simultaneously, also can arrange in agreement.In existing physical layer specification, uplink synchronous sense cycle length is 160ms, and it is 80ms that uplink synchronous keeps the thresholding general recommendations.

The physical layer signaling that Node B sends is used to notify UE to set up uplink synchronous, and this signaling does not exist in existing system.In order farthest to reduce influence to system, this physical layer signaling can pass through the HS-SCCH Channel Transmission, the receive mode that UE presses HS-SCCH in the existing system receives, and discerns this HS-SCCH by the H-RNTI in CRC (cyclic redundancy check (CRC)) field in the detection HS-SCCH channel and whether is sent to oneself.Existing HS-SCCH signaling content as shown in Figure 1, to need a special field to indicate this be once common HS-SCCH transmission or set up order synchronously.A kind of method is: the code channel field is carried out special filling in.In existing system, 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, and preceding 4 bit values must be smaller or equal to back 4 bits, such as 00000000 expression HS-PDSCH channel occupancy, 0 number road; 00000010 expression takies totally 3 code channels No. 0 to No. 2.Current 4 bit values are greater than the back during 4 bit values, existing UE can think that this is an exceptional signaling, can abandon, 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 specific information field 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 still carrying UE in cyclic redundancy check field is so that UE receives; All the other fields are as keeping the position, and can all fill out is 0 or 1.As Fig. 9 is that the signaling content of order is set up in the carrying on HS-SCCH described in the present invention synchronously.Preceding 4 bit values can keep as other expansion greater than back other bit pattern during 4 bit values; 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.

After step S804, UE received and set up order synchronously, UE at first will make a decision, and when judgement oneself is in desynchronizing state really, initiated the uplink synchronous process; Subscriber equipment is judged when laying oneself open to synchronous regime, utilizes physical layer control channel directly to reply the confirmation of synchronization signaling to the base station.Node B confirms after UE is in the uplink synchronous state this UE to be recovered the HS-DSCH transmission.

Under the CELL_FACH state, when Node B dispatches certain H-RNTI user, and do not know this user's specifying information, more can't be associated with this user's uplink.For Node B, when this H-RNTI user did not have downlink transfer in a period of time, pause had taken place just to think that this user is transmitted.And, may in the time that downlink transfer is paused, have uplink fully in the UE side, in case uplink is arranged, UE will initiate uplink synchronous automatically, enters synchronous regime.Thereby after Node B sent synchronous foundation notice, UE need judge that when judgement self was in desynchronizing state really, UE just need initiate the uplink synchronous process.UE judges that the foundation of own step-out is, the last transmission range has surpassed uplink synchronous now and kept thresholding.The uplink here is included in the transmission of Physical Random Access Channel, also may comprise the transmission that strengthens dedicated channel (E-DCH).

At this moment, UE should use the uplink synchronous process of existing system to select suitable uplink synchronous code, sends uplink synchronous code and receive affirmation information (in detail referring to 3GPP TS25.224 agreement) on the FPACH in the UpPCH subchannel that allows.Between UE and Node B, need an affirmation mechanism, make Node B know whether the synchronizing process of UE is finished, so that Node B recovers the transfer of data to this UE as early as possible.A kind of method is that UE finishes by the foundation of physical layer signaling explicit notification Node B uplink synchronous.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 E-RUCCH (enhancing Random Access Channel) channel in the existing HSUPA system.The E-RUCCH channel is a physical layer control channel, carrying dispatch request information, with the random access resource in the traditional PRACH channel sharing sub-district, make Node B can distinguish that conventional P RACH inserts or E-RUCCH inserts (in detail referring to 3GPP TS25.224 agreement) by dividing different uplink synchronous codes.Carrying RACH transmission channel on the PRACH channel, this transmission channel ends at CRNC (master control radio network controller), Node B receives the data that do not need to resolve behind the PRACH channel wherein, directly gives RNC (radio network controller) by 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 finish signaling system.Existing E-RUCCH channel as shown in Figure 6, need clearly identify so that Node B discerns this to E-RUCCH equally be that order is finished in a dispatch request or a foundation synchronously, a method the simplest is to distinguish by the crc field of E-RUCCH, when the CRC of the E-RUCCH that receives as Node B is common CRC coding, think 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 finish order.Finish order for synchronous foundation, the H-RNTI information that should fill in UE in last information field among the E-RUCCH " UE sign ", 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, such as " buffer state field " filled out is 0, and " highest priority logical channel data to be transferred amount " if 4 bits in have one just can represent that this is a special signaling for non-0.Utilize remaining bit again, expand the implication of special signaling such as " highest priority logical channel number ", in this example as long as utilize a kind of value wherein just can represent that signaling has been finished in foundation synchronously.

When the UE judgement oneself also is in synchronous regime (, the last uplink distance keeps thresholding smaller or equal to uplink synchronous now at interval), UE only needs to carry out the HARQ feedback as correctly receiving a HS-PDSCH Frame under the CELL_DCH state, that is, behind the fixing timing slip with HS-SICH channel that the HS-SCCH that sets up the notification command place synchronously is associated on reply ACK (affirmation).Node B receives ACK, just represents that UE is in synchronous regime.Wherein, the timing mechanism during the HS-DSCH transmission is identical under the timing mechanism between HS-SCCH and the HS-SICH and the CELL_DCH state.

After in a single day Node B receives the synchronous foundation order of UE, begin to recover scheduling, sending the HS-SCCH signaling on the suitable time and on the sequential of system's regulation, sending HS-PDSCH this UE.

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 starts timer T after sending synchronous foundation order on the 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 by HS-SICH, the fixed time interval between HS-SCCH and the HS-SICH was confirmable, and UE is when reporting confirmation of synchronization by E-RUCCH, rely on up access load condition in the sub-district and decided.Thereby the value of timer T will be determined 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.

Figure 10 shows a procedure chart (transmission of the upstream data that do not draw) of the descending HS-DSCH transmission of CELL_FACH state.Wherein the part of 1002 and 1006 indications is transmission of normal HS-DSCH, and it is consistent that the HS-DSCH under the sequential relationship between HS-SCCH and HS-PDSCH, HS-PDSCH and the HS-SICH and the existing system CELL_DCH state sends.There is a uplink and downlink service pause time in the interprocedual of 1002 and 1006 indications, initiate the 1006 described Cheng Qians of crossing at Node B, Node B will judge when this dead time will cause the UE uplink loss, according to thought of the present invention, Node B should notify UE to initiate uplink synchronous, and this process is as 1004 indications:

1004-2:Node B sends by the HS-SCCH channel and sets up order synchronously, and wherein the CRC of HS-SCCH partly carries in the H-RNTI information, signaling content of this UE in the code channel field to fill in to indicate this to be one by the bit pattern of agreement and sets up order synchronously; Timer T is set up in Node B startup synchronously.

After 1004-4:UE receives synchronous foundation order, judge when being in desynchronizing state really, press the flow process of existing system and initiate the uplink synchronous access;

1004-6:Node B confirms detected synchronous code, sends confirmation by the FPACH channel;

1004-8:UE receives that Node B is behind the confirmation of synchronization of sending on the FPACH channel, select suitable Random Access Channel on system's sequential that access process is arranged at random, to send E-RUCCH channel (with reference to 3GPP TS25.224 agreement), wherein in the UE id field, fill in the H-RNTI information of oneself, in crc field, carry out sending after the bit polarity inversion.

In the above-described embodiments, by setting up the synchronous method of fast uplink under the non-CELL _ DCH status, solve problem how to set up uplink synchronous when recovering transmission behind the service pause under the CELL_FACH state fast, can adapt to professional intermittent characteristics under the CELL_FACH state, the HS-DSCH transmission after the recovery can be carried out normally.

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

Claims

1. under non-CELL _ DCH status, set up the synchronous method of fast uplink for one kind, it is characterized in that, may further comprise the steps:

Step S702, before recovering to transmit after high speed-DSCH Downlink Shared Channel of subscriber equipment transmits the one period dead time of having paused, the base station notifies described subscriber equipment to set up uplink synchronous; And

Step S704, in response to the notice of described base station, described subscriber equipment judges and initiates the uplink synchronous process when laying oneself open to desynchronizing state, replys the confirmation of synchronization signaling to the base station after finishing described uplink synchronous; Subscriber equipment is judged when laying oneself open to synchronous regime, directly to base station answer confirmation of synchronization signaling.

2. method according to claim 1 is characterized in that, the step that described base station notifies described subscriber equipment to set up uplink synchronous may further comprise the steps:

Described base station notifies described subscriber equipment to set up described uplink synchronous by physical layer signaling.

3. method according to claim 1 is characterized in that the described dead time keeps thresholding greater than uplink synchronous, promptly subscriber terminal side keep uplink synchronous transmission intercal time of patient maximum simultaneous bias order.

4. method according to claim 2 is characterized in that, the content of described physical layer signaling comprises the indication of synchronous foundation order and the high speed descending sharing channel-Radio Network Temporary Identifier of described subscriber equipment at least.

5. according to claim 2 or 3 described methods, it is characterized in that described physical layer signaling is carried on the high speed-shared control channel.

6. method according to claim 1 is characterized in that, the operation after user terminal judgement self step-out may further comprise the steps:

Described subscriber equipment sends uplink synchronous code and receives affirmation information on the physical access channel;

After receiving described confirmation, described subscriber equipment utilizes physical layer control signaling to send the confirmation of synchronization signaling to described base station; And

After receiving described affirmation signaling, scheduling and the transmission to the high speed-DSCH Downlink Shared Channel of described subscriber equipment recovered in described base station.

7. method according to claim 6 is characterized in that, the content of described confirmation of synchronization signaling comprises that at least synchronous foundation finishes the relevant indication and the high speed descending sharing channel-Radio Network Temporary Identifier of described subscriber equipment.

8. according to claim 6 or 7 described methods, it is characterized in that the described physical layer control of using system Physical Random Access Channel resource transmission signaling.

9. method according to claim 1 is characterized in that, user terminal judges that the operation after self being in synchronously may further comprise the steps:

Described subscriber equipment sends the confirmation of synchronization signaling by physical layer control signaling to described base station; And

10. method according to claim 9 is characterized in that, described confirmation of synchronization order comprises synchronous foundation at least and finishes relevant indication.

11., it is characterized in that the indicating channel transmission is used at a high speed-shared to described confirmation of synchronization signaling according to claim 9 or 10 described methods.

12. method according to claim 1 is characterized in that, user terminal judges that the foundation that self is in desynchronizing state is, the last uplink distance keeps thresholding greater than described uplink synchronous now at interval.

13., it is characterized in that described uplink synchronous keeps thresholding to be arranged by agreement according to claim 3 or 12 described methods, perhaps by the high-rise configuration of network.