CN100450304C

CN100450304C - Method and apparatus for implementing state transfer in wireless communication system

Info

Publication number: CN100450304C
Application number: CNB2006100022294A
Authority: CN
Inventors: 胡军
Original assignee: Huawei Technologies Co Ltd
Current assignee: XFusion Digital Technologies Co Ltd
Priority date: 2006-01-24
Filing date: 2006-01-24
Publication date: 2009-01-07
Anticipated expiration: 2026-01-24
Also published as: CN1863395A

Abstract

The present invention relates to a method and an apparatus for implementing state transfer in a wireless communication system. The present invention primarily comprises the following steps: firstly, a network side establishes a wireless link accessed by a user terminal after the user terminal transfers the state, and notifies the user terminal to switch links in the process of wireless link establishment; secondly, the user terminal which receives the notification is switched to the wireless link. Thus, the present invention meets the needs of communication service having high time requirement and effectively enhances the service quality of the user service; in addition, the realization of the present lowers the service load of communication interfaces and reduces the information flow amount of the system to a certain extend.

Description

The implementation method of state transitions and device in the wireless communication system

Technical field

The present invention relates to wireless communication field, relate in particular to the implementation method and the device of state transitions in a kind of wireless communication system.

Background technology

In cordless communication networks such as existing WCDMA, UE (portable terminal) has three kinds of channel statuss under connection mode, and promptly the UE under the connection mode can be in three kinds of channel statuss, realizes different functions under different channel statuss, and is specific as follows:

(1) CELL_DCH (cell private channel) state: be responsible for distributing special-purpose channel resource, the channel code of descending distribution special use, the scrambler of uplink assignment special use to UE;

(2) CELL_PCH (cell paging channel) state: be not UE distribution service channel under this state, and only on chain of command, keep descending contact, keep up contact by Common Control Channel by paging channel;

(3) CELL_FACH (cell forward access channel) state: a plurality of UE share public channel, last behavior RACH (Random Access Channel), following behavior FACH (forward access channel), the UE sign C-RNTI (Cell Radio Network Temporary Identifier/Identity, Cell-RNTI) by the data block head distinguishes the data of each UE.

In the arbitrary moment of UE under connection mode, be merely able to be in wherein any state of above-mentioned three kinds of states.UE its present channel status in the process of commencing business can change, and at this moment, just relates to the branch problem of UE between three channel statuss.Had the implementation method that realizes that the residing channel status of UE shifts in existing technical standard, corresponding method is mainly used in realization and is shifted by the channel status of CELL_DCH-＞CELL_PCH-＞CELL_FACH-＞CELL_DCH successively with reference to shown in Figure 1.

Below in conjunction with accompanying drawing UE is described by the specific implementation of CELL_PCH state to the state transitions process of CELL_DCH state.

Wherein, for the handling process of initiating by network side of transferring to CELL_DCH by CELL_PCH as shown in Figure 2, specific as follows:

Step 21:RNC (radio network controller) is at the calling time of this UE correspondence, go up by PAGING TYPE 1 (1 type paging) message paging UE at PCH (calling channel), comprise the U-RNTI (wireless universal network temporary mark) that distributes to this UE in this message.

After step 22:UE receives PAGING TYPE 1 message, find that the U-RNTI in the message conforms to for the U-RNTI of this UE with network allocation, then UE sends CELL UPDATE (cell information renewal) message on RACH, and the cell update in the message is former because by the UE paging.

Step 23:RNC and Node B (base station) interaction message are set up dedicated wireless link, promptly set up dedicated wireless link on DCH.

Step 24:RNC receives after CELL UPDATE message and foundation finishes dedicated wireless link, UE is transformed into CELL_FACH from CELL_PCH, and on the FACH channel, by CELL UPDATE CONFIRM (cell information upgrades and confirms) message informing UE, comprise the configuration information of dedicated wireless link in this message.

After step 25:UE receives CELL UPDATE CONFIRM message, switch on the dedicated wireless link, thereby transfer to the CELL_DCH state, return PHYSICAL CHANNEL RECONFIG CMP (physical channel reconfigures and finishes) message by described dedicated wireless link.

Compare with the corresponding processing procedure that network side is initiated for the processing procedure of transferring to CELL_DCH by CELL_PCH that the UE side is initiated, only lacked that RNC is to the paging of UE in the step 21, other treatment step is identical.

From above-described processing procedure as can be seen, existing UE realizes the technical scheme that shifts owing to adopt the mode of serial to realize between different channel statuss, therefore, in the handle link handoff procedure, must adopt processing procedure shown in Figure 2, carry out each step by order one by one and carry out and realize, and simultaneously can more simultaneously treated steps in the handle link handoff procedure.Make this processing mode increase the time delay of channel status transfer process in the Radio Network System widely, and then cause to satisfy application requirements to the chain of command delay requirement under than higher application scenarios at some, such as, in the group communication business, need reduce time delay as far as possible, at this moment, if adopt said method, then can't satisfy the demand of group communication business.

Summary of the invention

The implementation method and the device that the purpose of this invention is to provide state transitions in a kind of wireless communication system are handled thereby can carry out state transitions with the short time, and then reduce the time delay in the state transitions process, improve the performance of wireless communication system.

The objective of the invention is to be achieved through the following technical solutions:

The invention provides the implementation method of state transitions in a kind of wireless communication system, comprising:

A, network side are set up user terminal and are carried out the Radio Link that inserts after the state transitions, and informing user terminal carries out link switchover in setting up described Radio Link process;

After B, user terminal are received described notice, switch on the described Radio Link.

Among the present invention, when the state transitions process of described user terminal was initiated by network side, then described steps A also comprised:

The radio network controller (RNC) of network side sends beep-page message to user terminal, is carrying the indication that does not need cell update message in the described message, and user terminal no longer returns page-response message to RNC after receiving this message.

The described indication that does not need cell update message is by the extend information carrying at the single mobile terminal sign of the wireless land connecting system in the paging acknowledgment information in the paging Class1 message.

Described method also comprises:

In the integrity protection of the data of eating dishes without rice or wine and ciphering process, respectively the counter among UE and the RNC is carried out initial synchronisation, and be 0 the equal initial synchronisation of the counter among UE and the RNC.

Described method also comprises:

Carrying out interacting message between RNC and the user terminal determines: when user terminal is paged, and under the situation that does not respond cell update message, the maximum synchronously temporal information that allows of down wireless link;

The base station in the described maximum permission time, based on down wireless link Initial Trans initial set value, periodically promoted the down wireless link Initial Trans by predetermined step-length before the up-link wireless link synchronization.

Described method also comprises:

The base station is set up process by the Radio Link between itself and the RNC and is obtained described cycle and step value.

Among the present invention, when the state transitions process of described user terminal was initiated by subscriber terminal side, then described method also comprised:

User terminal sends cell update message to the RNC of network side, after RNC receives described cell update message, and execution in step A.

Described steps A comprises:

A1, RNC issue the cell update acknowledge message to user terminal, and informing user terminal carries out link switchover.

Among the present invention, when the state transitions process of described user terminal was initiated by network side, then described steps A 1 comprised:

RNC behind the wait preset time, sends the cell update acknowledge message to user terminal after user terminal sends beep-page message.

Described method also comprises:

After user terminal switches on the described dedicated wireless link, return the physical channel configuration to RNC and finish message.

The present invention also provides the implement device of state transitions in a kind of wireless communication system, comprising:

Radio Link is set up module: be arranged among the RNC, be used to set up user terminal and needing after the state transitions carry out the Radio Link that inserts;

Link switchover controller: be arranged among the RNC, be used for setting up the Radio Link process, trigger the acknowledge message sending module;

The acknowledge message sending module: be arranged among the RNC, be used for sending the cell update acknowledge message to user terminal under the triggering of link switchover controller, described message is used to control the Radio Link that user terminal switches to foundation.

Described device also comprises:

Beep-page message sending module: set up module at Radio Link and set up in the Radio Link process, control RNC sends to user terminal and carries the beep-page message that does not need cell update message indication information, and the user terminal that receives this message no longer returns page-response message to RNC.

As seen from the above technical solution provided by the invention, method provided by the invention can reduce the time delay in the UE state conversion process, accelerated the processing speed of the state transitions of system handles UE, therefore, the present invention has not only satisfied the demand to the high communication service of time requirement, but also can effectively improve the service quality of customer service; In addition, realization of the present invention can also reduce the traffic load of communication interface, the information flow-rate in the minimizing system to a certain extent.

Description of drawings

Fig. 1 is three the link switchover process schematic diagrames of UE in the prior art;

Fig. 2 is a prior art embodiment schematic flow sheet;

Fig. 3 is the specific implementation schematic flow sheet of the link switchover initiated by network side among the present invention;

Fig. 4 is the specific implementation schematic flow sheet of the link switchover initiated by the UE side among the present invention;

Fig. 5 is the implement device schematic diagram that the invention provides method.

Embodiment

Core concept of the present invention is in the channel status transfer process of UE, interaction message between interaction message between RNC, the NodeB and RNC, the UE adopts the mode of parallel processing, and save some unnecessary interaction messages, realized reducing the time delay in the handle link switching flow.

More specifically say, the present invention be at RNC by setting up in the process of to be switched link of UE with the interacting message of Node B, come order UE to switch to be switched link by RNC by the interacting message that carries out with UE, finish the state transitions process of UE.In this handoff procedure, take executed in parallel owing to carry out the process of interacting message between RNC and NodeB and RNC and the UE, thereby effectively saved the needed time of state transitions processing procedure.

In addition, also expanded cell in RNC and the UE interaction message in the present invention, in the cell of expansion, carry corresponding state transitions information, with the purpose of indicating this paging is to realize that channel status shifts, for UE, it can dispense the page-response message that UE sends, and after UE is paged, directly carries out state transitions.

For the present invention there being further understanding,, at length specific implementation of the present invention is described below in conjunction with figure.And will with from network side and from the UE side initiate the present invention will be described to the example that is embodied as of the state transitions process of CELL_DCH by CELL_PCH.

At first, to describing to the state transitions process of CELL_DCH of initiating from network side, specific as follows by CELL_PCH:

From the channel status transfer process that network side is initiated by CELL_PCH-＞CELL_DCH, the link after RNC sends beep-page message and sets up switching simultaneously, promptly dedicated wireless link after the described link establishment, orders UE to switch on the described link again.

In the present embodiment, omitted process from the UE paging receiving message to RNC that return page-response message after, but directly sent command messages on the dedicated wireless link after order UE transfers to switching by RNC.

Corresponding handling process specifically comprises the steps: as shown in Figure 3

Step 31:RNC and NodeB carry out interacting message, to set up dedicated wireless link in the sub-district at UE place.

Step 32: when RNC and NodeB carried out interaction message, RNC also sent beep-page message to UE;

Be specially: RNC is according to the calling time of this UE correspondence, on PCH, send PAGING TYPE 1 (paging Class1) message, use this UE of U-RNTI paging of this UE, in described message, comprise the information whether the expansion cell " needs cell update message ", promptly do not need the indication of cell update message, the information of carrying in this cell is used to indicate UE not need to send cell update message;

The cell that above-mentioned extension of message comprises is the middle cell of expanding of UTRAN single UE identity (the single mobile terminal sign of wireless land connecting system) that the Page Record (paging sign) in PAGING TYPE 1 comprises, and this cell structure is as shown in table 1.

Table 1

＞whether need cell update message

MD

Boolean boolean mathematical operation

TRUE represents needs, and FALSE do not need to represent.If this cell does not exist, expression needs.

The cell of table 1 is used for notice UE when paging, and whether this paging needs UE to respond page-response message, promptly responds cell update message.If do not need to respond page-response message, then carry FALSE (vacation) sign in the message, after expression UE is paged, directly transfer to the CELL_FACH state;

In this step, RNC this source identity in the message that UE sends is false sign, and after UE receives PAGING TYPE 1 message, find that the U-RNTI in the message conforms to for the U-RNTI of this UE with network allocation, " whether needing cell update message " in the message exists and for FALSE, then directly transfers to the CELL_FACH state.

Step 33:RNC directly continues to send the cell update acknowledge message to UE, and UE transfers to the CELL_DCH state with order;

Be specially: the PCH radio frames that sends described PAGING TYPE 1 message correspondence at RNC, and postpone after several radio frames, on the FACH channel, send CELL UPDATE CONFIRM (cell update affirmation) message, in this message, comprise the configuration information of dedicated wireless link;

In this step, the purpose that postpones several radio frames is for after guaranteeing that UE can receive PAGING TYPE 1 message, has time enough to be transformed on the FACH channel and receives message, and general recommendations postpones 1 to 2 radio frames and gets final product.

Step 34:UE switches on the corresponding dedicated wireless link, and returns PHYSICAL CHANNELRECONFIG CMP (physical channel rebulids and finishes) message to RNC after receiving the described CELL UPDATE CONFIRM message that RNC sends;

At this moment, finished operating to the state transitions of CELL_DCH of UE by CELL_PCH.

In said process, carry out because the processing procedure of the process of setting up of the dedicated wireless link between RNC and the Node B and the control UE state transitions between RNC and the UE is parallel, effectively saved the corresponding processing time, reduced processing delay.Simultaneously, in the foregoing description provided by the invention, also save the processing procedure of the CELL_UPDATE message among Fig. 2, further reduced the time delay of handling, and the interacting message amount of eating dishes without rice or wine, improved the performance of network.

Above-mentioned improvement among the present invention need to prove: owing to the omission of CELL UPDATE message, make can't obtain by this control message packet RNC, for this reason, also need the present invention is carried out corresponding adaptation.

In the prior art, system by send that CELL UPDATE message transmits that some RNC need obtain about relevant informations such as link establishments, specifically comprise following three kinds of information:

(1) START (beginning): be used for the integrality of the data of eating dishes without rice or wine protected that counter is carried out initialization is synchronous with ciphering process;

(2) down public guide frequency mass measurement: be used to calculate the down wireless link Initial Trans;

(3) UE is to the transmission of wireless signals time delay of NodeB: be used for the time unifying when the up-link wireless link synchronization.

Owing to saved the processing procedure of CELL UPDATE message in the present invention, then RNC can not obtain these relevant information, this will produce certain influence to the treatment state transfer process, avoid influencing the respective handling measure of being taked with being described as respectively below, and will be specific as follows:

(1) for lacking START information processing method be: UE and RNC are 0 with the counter initialization respectively synchronously.

(2) for the processing method that lacks the down public guide frequency quality measurement information be:

May cause Initial Trans that inaccurate problem appearance is set owing to lack the down public guide frequency quality measurement information.Therefore, in order to reduce initial power inaccurate influence is set, method provided by the invention is introduced following corrective measure:

(a) at first, prolong the UE synchronous maximum permission time of down wireless link;

In existing protocol, by T312 parameter control UE down wireless link lock in time, improve the probability of UE down-going synchronous, method provided by the invention is the cell in the extended message, carry the information with this time correlation in the cell of message, it is synchronous to handle the UE down wireless link according to this information.

Specifically be to issue in the message of UE at RNC, optional cell in the extended message makes this cell carry temporal information, and specific implementation is as described below:

(a1) reconfigure UE optional cell of expansion in the message of CELL_PCH state what RNC issued UE, this cell is " the synchronous maximum permission time of down wireless link when not responding CELL UPDATE message when paged ", and its span is identical with the T312 parameter;

Described T312 is the synchronous maximum permission time of down wireless link, and value is an integer 1 to 15, and unit is second, starts timer T312 when UE begins the down-going synchronous process; UE finds the descending timer that stopped synchronously the time; Timer expiry is then thought to stop the down-going synchronous process by the down-going synchronous procedure failure.

(a2) issue the optional cell of expansion in the reconfiguration response message of RNC at UE, this cell is " whether the maximum permission time comes into force ", and value is TRUE, and expression comes into force.

Comprise this cell if UE issues in the reconfiguration response message of RNC, expression UE supports to omit the function of CELL UPDATE message; If do not comprise this cell, show that UE does not support this function, during to the DCH link switchover, RNC does not start this function to this UE at subsequent P CH.

(b) afterwards, in the synchronous maximum permission time after described prolongation, the periodically soaring down wireless link Initial Trans of Node B;

Be specially: before NodeB up-link wireless link synchronization, NodeB is on the basis of the initial set value of down wireless link Initial Trans, with periodic quantity and the periodically soaring down wireless link Initial Trans of setting of step value;

RNC specifically can set up the cycle of process notice NodeB power ramp and the step-length that rises of phase internal power weekly by dedicated wireless link.

By the down wireless link lock in time of prolongation UE, and the processing means of the down wireless link power ramp before synchronously, reduced the influence of not having descending open Loop Power control, guarantee the stability of link Initial Trans.

(3) for lacking the transmission of wireless signals time delay situation of UE to NodeB, then because NodeB has the function in the time-domain search, when radius of society was little, this situation can not influence Radio Link substantially and set up, therefore, also just need not to take special processing at this situation.

Secondly, with again among the present invention from describing to the state transitions process of CELL_DCH that the UE side is initiated by CELL_PCH.

This process is because for UE initiates, therefore, RNC need not to send beep-page message to UE, saved the process of the step 32 among Fig. 3, but sent cell update message to RNC, after RNC receives described message by UE, carry out the foundation of dedicated wireless link, follow-up step and Fig. 3 are basic identical.

For the handling process of the state transitions process of initiating by the UE side from CELL_PCH to CELL_DCH as shown in Figure 4, specifically may further comprise the steps:

Step 41:UE sends CELL UPDATE message to RNC on the RACH channel.

After step 42:RNC received CELL UPDATE message, RNC and NodeB carried out interacting message, set up dedicated wireless link.

Step 43: when RNC and NodeB carried out interacting message, promptly in the process of execution in step 42, RNC sent CELL UPDATE CONFIRM message on the FACH channel, and is same, comprises the configuration information of dedicated wireless link in this message;

This step and processing difference shown in Figure 2 are, this step is to set up in the process of dedicated wireless link to carry out between RNC and NodeB, rather than after the as shown in Figure 2 complete step 42, execution in step 43 again, therefore, the present invention can reduce the time delay in the state transitions process.

Step 44:UE switches to dedicated wireless link after receiving CELL UPDATE CONFIRM message, returns PHYSICAL CHANNEL RECONFIG CMP message, finishes the state transitions of UE.

From above-mentioned description at Fig. 3 and Fig. 4 as can be seen, no matter be the state transitions of initiating by network side, still the state transitions of being initiated by UE all can realize with less time delay, thereby has effectively improved the communication performance of cordless communication network.

The present invention also provides the implement device of state transitions in a kind of wireless communication system, in order to understand the present invention well, will be elaborated to device provided by the invention below.Described device can be arranged among the RNC, and the structure of this device comprises as shown in Figure 5: Radio Link is set up module, link switchover controller, acknowledge message sending module, and comprises the special beep-page message sending module that is provided with of the present invention alternatively.

Below introduce in detail each module of forming device provided by the invention, specific as follows:

Radio Link is set up module: be arranged among the RNC, be used to set up user terminal and needing after the state transitions carry out the Radio Link that inserts, this module is the module that has existed among the RNC;

Link switchover controller: be arranged among the RNC, be used for setting up the Radio Link process, trigger the acknowledge message sending module,, save the time that state transitions needs so that RNC can send the cell update acknowledge message to user terminal when setting up Radio Link;

Also comprise the beep-page message sending module in the device of the present invention, when initiating the channel status transfer operation by network side, this module is used for setting up module at Radio Link and sets up the Radio Link process, control RNC sends to user terminal and carries the beep-page message that does not need cell update message indication information, and the user terminal that receives this message no longer returns page-response message to RNC.

In a word, method provided by the invention can reduce the time delay of state transitions process, thereby can support some communication services fast when UE carry out state transitions, improves telecommunication service quality, and to a certain extent, has reduced the information flow-rate in the system.

The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.

Claims

1, the implementation method of state transitions in a kind of wireless communication system is characterized in that, comprising:

2, method according to claim 1.It is characterized in that when the state transitions process of described user terminal was initiated by network side, then described steps A also comprised:

3, method according to claim 2 is characterized in that, the described indication that does not need cell update message is by the extend information carrying at the single mobile terminal sign of the wireless land connecting system in the paging acknowledgment information in the paging Class1 message.

4, method according to claim 2 is characterized in that, described method also comprises:

5, method according to claim 2 is characterized in that, described method also comprises:

6, method according to claim 5 is characterized in that, described method also comprises:

7, method according to claim 1 is characterized in that, when the state transitions process of described user terminal was initiated by subscriber terminal side, then described method also comprised:

8, according to each described method of claim 1 to 7.It is characterized in that described steps A comprises:

9, method according to claim 8 is characterized in that, when the state transitions process of described user terminal was initiated by network side, then described steps A 1 comprised:

10, method according to claim 8 is characterized in that, described method also comprises:

11, the implement device of state transitions in a kind of wireless communication system is characterized in that, comprising:

12, device according to claim 11 is characterized in that, described device also comprises: