CN101103644A - Method, apparatus and system for redistribution of mobile stations to different channels - Google Patents

Abstract

Method and apparatus for enhanced selection of a channel for use in redistributing mobile stations to various frequencies in a (cdma) communication system. In one aspect, the method appends a redistribution alteration record to a common channel redistribution message. The redistribution alteration record alters the sequencing of the mobile station when selecting a channel in the common channel redistribution message. In another aspect the alteration record allows the mobile station to transition to the idle state without performing system determination.

Description

Be used for travelling carriage is re-assigned to the method, apparatus and system of different channels

Priority according to 35 U.S.C. §, 119 requirements

The title that present patent application requires on October 22nd, 2004 to submit to be " METHOD ANDAPPARATUS FOR ENHANCED REDISTRIBUTION OF MOBILESTATIONS TO DIFFERENT FREQUENCY BANDS WITHOUTPERFORMANCE DEGRADATION " the 60/621st, the priority of No. 436 provisional application, this provisional application has been transferred to its assignee, thereby it specially is combined in herein as a reference.

Technical field

The present invention relates generally to communication system, and more specifically relate to the method and apparatus that is used for strengthening in the selection that travelling carriage is re-assigned to the channel that the different frequency bands process uses.

Background technology

In some years in the past, wireless communication technology has obtained huge development.This development partly is that the quality of the very big raising of the freedom of movement that provided by wireless technology and the voice communications versus data communications on the wireless medium promotes.The quality of speech business improve and the increase of data service and will continue the public that communicates by letter is produced significant impact.

Along with the increase of the development of cordless communication network, the user need move at travelling carriage across a network when an overlay area moves to another.Work on various frequencies and frequency band in the base station.Mobile unit should be able to be from a frequency band conversion to another frequency band, and can not cause traffic lost or deterioration.The leap wireless system shares or the distributing user load does not produce interruption to guarantee quality of service, also can be favourable.With mobile station in selecting be assigned to different frequencies or frequency band, the protocol revision version of ability (for example, the service that can provide), travelling carriage of frequency band or frequency and the spendable service of travelling carriage etc. are provided.

Be currently available for and optionally distribute the mechanism of travelling carriage to comprise: paging channel is distributed, traffic channel assignments, expansion CDMA Channel List Message (ECCLM), and expansion world business redirect message (EGSRDM).Paging channel is distributed and can be used to travelling carriage is pointed to paging channel on different frequency bands or the frequency.Yet the shortcoming of this possibility is, should carry out individually for each travelling carriage.Traffic channel assignments can be used to travelling carriage is assigned to Traffic Channel on different frequency bands or the frequency.This method also should be carried out individually.ECCLM is the finite aggregate that is used for based on mobile station capability, crosses over the broadcast that the different frequency in the same frequency band distributes travelling carriage.The limitation of this method is, can only adopt limited control to change in same frequency band.In addition, ECCLM only provides uniform distribution.EGSRDM is the finite aggregate that is used for based on mobile station capability, travelling carriage is pointed to again the broadcast of different frequency or frequency band.EGSRDM is restricted to the independent sensing again that has Finite control.In addition, EGSRDM should the experience system determine.Therefore, need the method, apparatus and system that are used for travelling carriage is re-assigned to different channels.

Summary of the invention

One embodiment of the present of invention comprise a kind of method, and this method comprises and append to common signal channel and redistribute message redistributing change record, and in response to redistributing the ordering (sequencing) that change record changes travelling carriage.

Another embodiment of the present invention comprises a kind of method that is used for a plurality of travelling carriages are re-assigned to a plurality of channels of communication system.This method comprises generating and is used to append to the change record of redistributing that common signal channel is redistributed message, and redistributes change record and common signal channel is redistributed message by the transmission of the common signal channel in the communication system.

Another embodiment of the present invention comprises a kind of method that is used for changing the ordering of travelling carriage.This method comprises that receiving common signal channel redistributes message and redistribute change record, and changes the ordering in the travelling carriage in response to redistributing change record.

Another embodiment of the present invention comprises a kind of computer-readable medium, and this computer-readable medium comprises the computer executable instructions that is used for a plurality of travelling carriages are re-assigned to a plurality of channels of communication system.Computer executable instructions is used to generate and is used to append to the change record of redistributing that common signal channel is redistributed message, and redistributes change record and common signal channel is redistributed message by the transmission of the common signal channel in the communication system.

Another embodiment of the present invention comprises a kind of computer-readable medium, and this computer-readable medium comprises the computer executable instructions of the ordering that is used for changing travelling carriage.Computer executable instructions is used to receive common signal channel to be redistributed message and redistributes change record, and changes ordering in the travelling carriage in response to redistributing change record.

Another embodiment of the present invention comprises a kind of base station that is used for a plurality of travelling carriages are re-assigned to a plurality of channels of communication system.This base station comprises being used to generate and is used to append to the device of redistributing change record that common signal channel is redistributed message, and is used for redistributing the device that change record and common signal channel are redistributed message by the common signal channel transmission of communication system.

Another embodiment of the present invention comprises a kind of travelling carriage, and this travelling carriage comprises that being used to receive common signal channel redistributes message and redistribute the device of change record, and is used in response to redistributing the device that change record changes the ordering of travelling carriage.

Description of drawings

Fig. 1 is the diagrammatic sketch of example communication system according to an embodiment of the invention;

Fig. 2 is the diagrammatic sketch that is used for the frequency and the bandwidth assignment of example communication system according to an embodiment of the invention;

Fig. 3 is a travelling carriage call treatment synoptic diagram according to an embodiment of the invention;

Fig. 4 is according to one embodiment of present invention, supports hash on a plurality of frequency bands to avoid the wireless communication system of unnecessary frequency shift simultaneously;

Fig. 5 shows the field and the field length of Sync Channel Message according to an embodiment of the invention;

Fig. 6 shows according to one embodiment of present invention, goes up the ashing technique of using at Forward Paging Channel (FPCH);

Fig. 7 shows in detail the structure of registration message according to an embodiment of the invention;

Fig. 8 demonstrates field and the field length that is used for request command according to an embodiment of the invention;

Fig. 9 demonstrates field and the field length that is used for the non-autonomous type registration of parameter change according to an embodiment of the invention;

Figure 10 demonstrates field and the field length that is used for call message (originationmessage) according to an embodiment of the invention;

Figure 11 demonstrates field and the field length that is used for system parameters message according to an embodiment of the invention;

Figure 12 shows field and the field length according to the expansion CDMA Channel List Message of the enhancing of one or more embodiment of the present invention;

Figure 13 shows field and the field length according to the expansion world business redirect message of the enhancing of one or more embodiment of the present invention.

Embodiment

Communication system now is supposed to support various application.A kind of such communication system is code division multiple access (CDMA) system, and it meets " travelling carriage one base station compatibility standard that TIA/EIA-95 is used for dual mode wideband spread spectrum cellular system " and offspring's standard (hereinafter being called IS-95) thereof.Version after the renewal of cdma system is called as CDMA2000.

Below explanation and each side of the present invention is disclosed at the relevant drawings of specific embodiments of the invention.Alternate embodiments can designed without departing from the scope of the invention.In addition, will can not be elaborated, perhaps will omit its explanation, so that can not blur correlative detail of the present invention to known key element of the present invention.

" exemplary " this speech is used to refer to " example or illustration as an example, " in this article.Be described as " exemplary " any embodiment herein and be not to be counted as being more preferably or superior than other embodiment.Equally, term " embodiments of the invention " does not require that all embodiment of the present invention comprise feature, advantage or the operator scheme of being discussed.

In cdma system (for example, the CDMA2000 system), the communication between the user is undertaken by one or more base stations.In wireless communication system, forward link (or down link) is meant that signal advances to the channel of subscriber station by it from the base station, and reverse link (or up link) is meant that signal advances to the channel of base station by it from subscriber station.By on reverse link to the base station transmits data, first user on subscriber station and second user on second subscriber station communicate.The base station receives data from first subscriber station, and routes data to the base station of serving second subscriber station.The position of depending on subscriber station, these two subscriber stations all can be served by single base station or a plurality of base station.Under any circumstance, the base station of serving second subscriber station sends data on the forward link.Subscriber station can also by with being connected of serving BS with terrestrial network (for example, the internet) communication, rather than with second subscriber station communications.In such as those radio communications that meet IS-95, forward link and reverse link signal are transmitted in disjoint frequency band.

Telephone system is made up of two parts: wired subsystem and wireless subsystem.Wired system is public switch telephone network (PSTN) and internet.It also can comprise instrument, video or other service.Wireless subsystem comprises base station sub-system, and it comprises mobile switching centre (MSC), base station controller (BSC), attaching position register (HLR), VLR Visitor Location Register (VLR), base transceiver station (BTS) and travelling carriage (MS).

Fig. 1 represents example communication system 100, and it supports a plurality of users, and some aspects or embodiment can realize therein.A kind of such system is the cdma communication system that meets the IS-95 standard.Communication system 100 comprises a plurality of sub-district 102A-102G.Each sub-district 102 is served by relevant base station (BS) 104A to 104G respectively.Each antenna for base station can have more than a sector, and can work on a plurality of frequencies or frequency band.

Distant station in the overlay area or travelling carriage (MS is also referred to as distant station or portable terminal) 106 can be (that is, static) fixed or move.As shown in Figure 1, various MS 106 are dispersed in the whole system.Whether whether each MS 106 depend on for example to have adopted soft handover or terminal to be designed and be operated with (parallel or sequentially) and receive a plurality of transmission from a plurality of base stations, and at any given time on down link and up link, with at least one and may be that more a plurality of base stations 104 communicate.

Down link is meant the transmission from BS to MS, and up link is meant the transmission from MS to BS.In the exemplary embodiment, some among the MS 106 have a plurality of reception antennas, and other MS 106 only has a reception antenna.In Fig. 1, to MS 106A and 106J transmission data, BS 104B is to MS 106B and 106J transmission data on down link for BS 104A, and BS 104C transmits data to terminal 106C, or the like.

The requirement that improves constantly to wireless data transmission and the expansion by the obtainable service of wireless communication technology has caused the development of specific data services.When data quantity transmitted and the number of transmissions increase, utilize available bandwidth to become more and more important efficiently.In addition, interference has become major issue.Which transmission channel condition can influence can be sent efficiently.Therefore, need a kind of method that travelling carriage is re-assigned to different channels.

Fig. 2 demonstrates frequency and the bandwidth assignment that is used for the base station 104A-104G of example system according to an embodiment of the invention.104A is assigned to frequency f 1, and 104B is assigned to frequency f 2, and 104C is assigned to frequency f 3, and 104D is assigned to frequency f 4, and 104E is assigned to frequency band b1, and 104F is assigned to frequency band b2, and 104G is assigned to frequency band b3.The travelling carriage that moves to the overlay area of 104B from the overlay area of base station 104A will change frequency into f2 from f1, and will move to frequency band b3 from frequency f 4 from the travelling carriage that base station 104D moves to 104G.

Current, when travelling carriage when a base station moves to another base station, the transfer of frequency can use common signal channel to redistribute message, such as expansion CDMA Channel List Message (ECCLM).This message is the broadcast of transmitting on F-BCCH and F-PCH.This message comprises NUM_FREQ (being 15 to the maximum) inferior appearance: the CDMA_FREQ of following field, comprises the CDMA Channel of F-PCH/F-BCCH; Whether RC_QPCH_HASH_IND, base indication corresponding C dma channel will be selected for can RC＞2 or can support the channel hash of the travelling carriage of F-QPCH.The latter is only just comprised under the situation of RC_PQCH_SEL_INCL=1; And TD_HASH_IND, whether its indication corresponding C dma channel will be selected for the channel hash of the travelling carriage that can support indicated transmission diversity.The condition of TD_HASH_IND is as follows: if TD_SEL_INCL=1 and TD_MODE﹠amp; TD_POWER_LEVEL is comprised.

According to the travelling carriage of ECCLM message action will be from ECCLM all listed channels begin and select subclass.Subclass 1 is based on following criterion selection: if TD_SEL_INCLr=1 and travelling carriage are supported TD_MODEr, then select all channels of TD_HASH_INDr=1.If travelling carriage is not supported TD_MODEr, then select the channel of TD_HASH_INr=0.If TD_SEL_INCr=0 then selects all channels.If subclass 1 is sky then stops to handle.If subclass 1 is not empty, then from subclass 1, select final subclass.If RC_QPCH_SEL_INCr=1 and travelling carriage can RC＞2 or F_QPCH, then only use the channel of RC_QPCH_SEL_INCr=1.If travelling carriage can not RC＞2 and F-QPCH, then use all channels.If subclass is empty, then use whole subclass 1 as final subclass.Otherwise, use whole subclass 1 as final subclass.If there is final subclass, then use hashing algorithm to come selective channel with following input: based on the IMSI_S of travelling carriage in order to the international mobile subscriber identity of registration, and the channel quantity in the final subclass.

Although ECCLM really with travelling carriage from a frequency inverted to another frequency, it only supports uniform hash, and hash is had limited control.Particularly, only provide RC＞2, F-QPCH support and TD to support control.In addition, ECCLM only supports the hash in the frequency band.Can provide modification by allowing hash based on non-homogeneous weight to the hash that adopts ECCLM.This requires to add following parameter: WEIGHT_INCL, and indication still will use equal weight will for all Frequency Distribution weights; And CDMA_FREQ_WEIGHT, it is a concrete weight of distributing to each frequency.

Embodiment provides the extra control to hash, and it selects how to distribute travelling carriage more subtly.One embodiment of the present of invention comprise by generate extra record (such as, comprise the change record of redistributing of ability control) with the ordering of indication travelling carriage selection of alternate channel subclass before hash is handled, increase or strengthen ECCLM.An embodiment changes ordering and comprises the alternate channel selection.An example is based on the hash of MOB_P_REV.MOB_P_REV_IND (00: do not comprised 01: scope, 10: the position mapping) is used in this control.Extra control comprises: EXCLMOB_P_REV_IND, and it determines whether to comprise scope; MOB_P_REV_MIN, it is minimum applicable MOB_P_REV; MOB_P_REV_MAX, it is maximum applicable MOB_P_REV; And MOB_P_REV_BITMAP, cover position mapping length; And MOB_P_REV_BITMAP, cover the position mapping.In addition, can comprise that ACCOLC is as enhancing.

Other ashing technique can comprise the common signal channel of being supported, the Traffic Channel of being supported, the service of being supported and ability overview (capability profile).The common signal channel of being supported comprises: FQPCH_SUP_IND_INCL, QPCH_SUP_IND, TD_INCL, TD_SUP_IND, TD_MODE.The Traffic Channel of being supported comprises: TD_INCL, TD_SUP_IND, TD_MODE, RC_SUP_NCL, EXCL_RC_IND (it indicates whether to comprise scope), RC_MIN (it is minimum applicable RC), RC_MAX (it is maximum applicable RC), RC_BITMAP_LEN (it is a position mapping length), PDCH_SUP_IND_INCL, PDCH_SUP_IND, SHARED_TRFCH_SUP_IND_INCL, SHARED_TRFCH_SUP_IND.The service of being supported comprises: SO_GROUP_INCL, SO_GROUP_BITMAP, BCMCS_SUP_ND, PTT_SUP_IND, VOIP_SUP_IND and HSDATA_SUP_IND.

Extra enhancing comprises the ability overview number of one group of ability of definition record.This can comprise: CAP_PROFILE_MITMAP_LEN, CAP_PROFILE_BITMAP.

Can strengthen hash by the embodiment that allows hash in the frequency band.This is to add the CDMA_BAND parameter by each CDMA_FREQ in ECCLM to realize.When hashing to different frequency bands, an embodiment allows travelling carriage directly to enter idle condition, and this has reduced the transition times that jumps to the free time in new frequency band or frequency.This embodiment has added the DIRECT_TO_IDLE_IND mark for each frequency in the different frequency bands, and whether the indication travelling carriage is allowed to directly enter idle condition or travelling carriage and whether should enters system and determine sub-state.If travelling carriage is allowed to directly enter idle condition, then it may need signalling to transmit the F-PCH/F-BCCH parameter, if those parameters are different from current parameter (PCCH_BCCH_PARAMS_NCL, PAGE_CH, PRAT, SR1_BCCH_CODE_CHANNEL, SR1_CRAT, SR1_BRAT).The further enhancing that provides in another embodiment allows travelling carriage to walk around the registration that powers on, to reduce unnecessary access channel message.This is to realize by adding the POWER_UP_REG_IND mark for each frequency in the different frequency bands, and whether this mark indication travelling carriage is allowed to skip execution powers on registration and switch to this frequency band.Depend on the realization at base station place and be input to parameter in the hashing algorithm, the base station registration that may still need to power on.

The above embodiments require travelling carriage to handle the ECCLM of enhancing slightly differently.Travelling carriage will be at first need be selected the subclass of the frequency that is fit to based on sending parameter that signal transmitted.The ECCLM that strengthens transmits many stand-alone capabilities, comprising: MOB_P_REV_BITMAP, QPCH_SUP_IND, PDCH_SUP_IND.ECCLM also transmits the rule that is used to use independent control.As an example, use the priority of these controls to be comprised: MOB_P_REV_PRIORITY, QPCH_PRIORITY, PDCH_PRIORITY.In addition, the base station should guarantee that travelling carriage does not finish with vacuous subset.Travelling carriage will use the corresponding weights of hashing algorithm and selected frequency then, select to want be tuned to final frequency.If selected frequency is in another frequency band, then travelling carriage will determine whether directly to enter idle condition based on the mark among the ECCLM.In addition, MS will determine whether to skip the registration that powers on based on the mark among the ECCLM.

Expansion world business redirect message (EGSRDM) is another example that common signal channel is redistributed message, and is to can be used for the travelling carriage that will the move another kind of mechanism from a frequency inverted to another frequency.Different with ECCLM, EGSRDM can make travelling carriage switch to the interior frequency of another frequency band.In Fig. 2, travelling carriage can be switched to 104E from base station 104A, is switched to the new frequency of finding the frequency band b1 from frequency f 1.EGSRDM is the broadcast of transmitting on F-BCCH and F-PCH.The content of this message comprises: REDIRECT_ACCOLC, the access of pointing to again overload classification; RETURN_IF_FAIL, the designator that under failure scenarios, returns; DELETE_TMSI, deletion TMSI designator; REDIRECT_P_REV_INCL, the included mobility protocol of sensing again revision version.If be set to ' 0 ', then REDIRECT_P_REV_INCL is applicable to all travelling carriages.REDIRECT_P_REV_INCL can also comprise: EXCL_P_REV_IND, and with the excluded designator of mobility protocol revision version.EXCL_P_REV_IND also comprise the scope of the travelling carriage that REDIRECT_P_MIN..REDIRECT_P_MAX} is specified in pointing to again, be left out or be included in information.The value of REDIRECT_P_MIN and REDIRECT_P_MAX should＞=6.

Again point to cdma system and need following listed information.Cdma system uses record type as follows: RECORD_TYPE=00000010.Needed other information comprises: the band class that BAND-CLASS, travelling carriage are just being pointed to again; EXPECTED_SID/EXPECTED_NID is if just pointed to particular system, desired SID/NID again; And { CDMA_CHAN}.That also comprised is NUM_CHANS, i.e. the occurrence number of CDMA Channel, and when at every turn the occurring of these CDMA Channel, travelling carriage will attempt to obtain cdma system.

Travelling carriage can also implementation change frequency or frequency band.If EGSRDM is applicable to travelling carriage, then travelling carriage will be provided with the again sensing record of REDIRECT_REC=from the message that receives.Travelling carriage also will have under the situation of pointing to indication again, and the system of entering determines sub-state.In case the system of being in determines sub-state, travelling carriage just is set to REDIRECTION to allow, and comes selective system according to current sensing criterion again.Use and currently point to the system that criterion carries out again and select to comprise step described below.If the CDMA pattern operation in the travelling carriage support band class that BAND_CLASS identified, then travelling carriage will proceed to system's selection of many n orders, wherein n equals the value of indicated NUM_CHANS field: select for the i subsystem, wherein the scope of i is to n from 1, if the operation on the CDMA Channel that the value that travelling carriage support and CDMA_CHAN field the i time occurs is associated, then travelling carriage is set to the value of the i time appearance of CDMA_CHAN field to CDMACH, and CDMABAND is set to the value of appointment in the BAND_CLASS field.Yet if the operation on the CDMA Channel that travelling carriage is not supported to be associated with the value that the i time of the CDMA_CHAN field occurs, travelling carriage will not carry out the i subsystem and select.

In case travelling carriage has been carried out above process, handle and proceed to obtain selected system.This comprise travelling carriage advance by pilot channel obtain sub-state, synchronizing channel is obtained sub-state and the sub-state of sequence change.If from using different frequency piece or different frequency bands classification to switch, then travelling carriage enters idle condition then and carries out the registration that powers on.

Above-mentioned process has limitation, and these limitations have obtained overcoming in an embodiment of the present invention.As mentioned above because EGSRDM only carries one and points to record again, in case and EGSRDM be configured for a kind of purposes, just can not carry out other and point to again, so EGSRDM only can carry out once sensing again at given time arbitrarily.Embodiment provides a plurality of records that point to again of following EGSRDM by additional one or more follow-up change records of redistributing.This allows to carry out concurrently a plurality of sensings again.This embodiment also uses simple rule to define the travelling carriage action.This rule request travelling carriage is taken action according to first record that is suitable for.

The limitation of this EGSRDM is, the mis-behave that travelling carriage must the experience system be determined and caused owing to extra delay.One embodiment of the present of invention allow travelling carriage directly to enter idle condition on frequency band that points to again or frequency.Required parameter, for example F-PCH speed is included in the EGSRDM record.

Limitation in addition is that travelling carriage must be carried out the registration that powers on, thereby produces the increase of reverse link loading.One embodiment of the present of invention have been eliminated the needs of carrying out the registration that powers on when changing frequency band or frequency chunks.This embodiment coordinates the needs that mobile station position update powers on and registers with elimination.

EGRSDM has only limited control and can be used for the limitation of selecting which travelling carriage to be pointed to again.Especially, having only ACCOLC and MOB_P_REV scope is available control.One embodiment of the present of invention provide following control to select which travelling carriage to be pointed to again subtly: ACCOLC comprises the MOB_P_REV that scope and position are shone upon; Probability, such as, 60% points to BC1, and 40% points to BC2.Mobile station capability also can be used to make point to judicial convenience again.The special services of being supported comprises: service option quantity and service option group, BCMCS, PTT, VoIP.The channel of being supported comprises: DV (PDCH), the Traffic Channel of sharing, and QPCH.RC and TD are also by the travelling carriage support.The ability of travelling carriage can define with mobile station capability overview number.One embodiment of the present of invention are used mobile station capability overview number and travelling carriage are pointed to different frequencies or frequency band again.

Fig. 3 demonstrates according to one embodiment of present invention, in the CDMA2000 wireless communication system, and the state of travelling carriage process during call treatment.Fig. 3 demonstrates the summary 300 of call treatment state.Call treatment powers at MS and begins in (302).After powering on, MS enters travelling carriage init state 310.In the travelling carriage init state, travelling carriage is handled pilot tone and synchronizing channel to obtain and synchronous with cdma system.After entering the travelling carriage init state, MS begins the simulation model operation, as the part of initialization task 306.In case initialization task 306 is done, the simulation model operation just finishes when travelling carriage obtains system sequence fully.After obtaining system sequence, travelling carriage enters idle condition 314.

When being in idle condition, travelling carriage monitors or Forward Common Control Channel (F-CCH) are to receive expense and travelling carriage refer message (such as the beep-page message of indication incoming call) from BS.Also can when being in idle condition 314, carry out MS power control.In addition, MS monitors Broadcast Control Channel (BCCH), carries out registration, idle switching and position and determines.These actions are necessary to MS allocated frequency band and frequency.Paging channel message can require travelling carriage to make response with affirmation (ACK) message, perhaps makes a call, and perhaps carries out registration.If MS can not the paging receiving channel, then travelling carriage can turn back to travelling carriage init state 310.

At system's access state 322, MS sends message to base station BS on the access channel of access channel or enhancing.BS intercepts these channels, and on paging channel or F-CCH MS is made response.MS receives the affirmation (ACK) to the transmission of the access channel except call message or page-response message.

Travelling carriage on Traffic Channel is controlled in such state 330, and BS and MS communicate by the special-purpose forward direction and the reverse traffic channel of use delivery such as the user profile of voice-and-data.

Fig. 4 is according to one embodiment of present invention, supports transfer of data and is suitable for dispatching a example to the communication system of a plurality of users' transmission.Fig. 4 shows the operation of the base station 104 of Fig. 1.Hereinafter will be elaborated to Fig. 4, wherein particularly, base station 420 and base station controller (BSC) 410 and packet network interface 406 are connected by interface.Base station controller 410 comprises the channel transmitted scheduler 412 that is used for dispatching patcher 200.Channel scheduler 412 determines which data will be transmitted.

In addition, channel scheduler 412 selects specific data queue to be used for transmission.Then, from data queue 430, fetch the data quantity transmitted of wanting that is associated, and provide it to element in channel 426 and be used to be transferred to the distant station that is associated with data queue 430.As described below, channel scheduler 412 selects to be used for to be provided at the formation of the data that the transmission of back is transmitted.

Although only show a selector element 416 for easy in Fig. 4, base station controller 410 can comprise many selector elements 416.Each selector element 416 is assigned with to be used to control the communication between one or more base stations 420 and the travelling carriage (not shown).If selector element 416 also is not assigned to given distant station, then give call control processor 418 message informing that needs the paging distant station.Call control processor 418 guides base station 420 paging distant stations then.

Data source 402 comprises and will be transferred to a certain amount of data of given distant station.Data source 402 provides data to packet network interface 406.Packet network interface 406 receives data and routes data to selector element 416.Selector element 416 transfers data to each BS 420 that communicates with target MS distant station then.In the exemplary embodiment, each base station 420 keeps data queue 430, and these data queue's 430 storages will be transferred to the data of MS.

MS begins initialization process when calling out.MS at first determines the type of system sequence by searching for spendable pilot signal.Pilot signal is information-carrying not, but MS can be by relevant its oneself the sequential of aiming at pilot signal.When finding this correlation, MS has the synchronism with synchronizing channel, and can read Sync Channel Message with its sequential of further improvement.MS can search on single CDMA Channel up to just announcing that the failure and the system that turns back to determine to select another channel or another system 15 seconds.It not is standardized that search is handled, and the system that obtains can depend on that system realizes the required time.

In CDMA2000, on single CDMA Channel, many pilot channels can be arranged.Expansion pilot tone and auxiliary pilot when these pilot tones can comprise orthogonal transmission diversity pilot tone, sky.During system obtains, travelling carriage will can not be found any one in these pilot tones, because those pilot tones are on different walsh codes, and during obtaining processing, travelling carriage only is at search Walsh ₀

In case travelling carriage has synchronism, it just reads Sync Channel Message with its sequential of further improvement.Fig. 5 demonstrates according to one embodiment of present invention, field of finding in Sync Channel Message and field length.Sync Channel Message is continuously transmitted on synchronizing channel.This message provides the information that is used to improve its sequential and reads paging channel for travelling carriage.Typically, have only LC_STATE and SYS_TIME field when each transfer synchronous channel message, to change.

Travelling carriage receives the information the Sync Channel Message from the base station, this Sync Channel Message makes travelling carriage can determine when the stored information of information that will receive and travelling carriage compares whether travelling carriage can communicate with this base station.A kind of customizing messages that is stored in the travelling carriage comprises the MOB_P_REV field, and this field comprises the value of the maximum protocol revision version of supporting as travelling carriage, and this value is the value by the travelling carriage storage.

Sync Channel Message comprises following field:

The maximum protocol revision version that P_REV-is supported the base station.

The minimal protocol revision version of the travelling carriage that MIN_P_REV-is supported the base station.If travelling carriage has obtained synchronizing channel, and MOB_P_REV＜MIN_P_REV, then it does not attempt to obtain the service in this system, but the system that turns back to determines to attempt selecting another system.The value that P_REV_IN_USE-is calculated by travelling carriage, this value are the current protocol revision versions that is just being used by travelling carriage.Whenever travelling carriage receives Sync Channel Message, and it all is arranged to the value of P_REV_IN_USE the smaller among P_REV and the MOB_P_REV.Travelling carriage will not asked P_REV_IN_USE unsupported service of institute or feature.

In case travelling carriage has been finished system and obtained, travelling carriage just enters idle condition.The term idle condition is chosen words inappropriately in a measure.Travelling carriage can be very busy in idle condition.Usually, in the travelling carriage paging receiving channel one, and handle message on this channel.With expense or configuration messages and the sequence number of being stored relatively, has the most current parameter to guarantee travelling carriage.The travelling carriage refer message is checked, to determine the user of expection.

When being in idle condition, travelling carriage can be carried out following function:

The execution paging channel monitors;

Carry out enrollment process;

Execution to the response of expense information operating (in response to system parameters message, neighbor list messages,

CDMA Channel List Message or access parameter messages);

Carry out the operation of travelling carriage page match;

Carry out the operation of travelling carriage order and Message Processing;

The operation of execution mobile station calling;

Carry out the travelling carriage message transfer operations, if the user guides its message transfer;

Carry out travelling carriage electricity operation down.

CDMA2000 uses four kinds of extra Overhead Messages: user area identification message, private neighbor list (private neighbor list) message, expansion world business redirect message (EGSRDM) and expansion CDMA Channel List Message (ECCLM).User area identification message and private neighbor list messages are used to support the CDMA hierarchical service.

Expansion world business redirect message (EGSRDM) makes travelling carriage point to another system again.The extend type of message comprises the ability that travelling carriage is pointed to again as the function of its protocol revision version.

Expansion CDMA Channel List Message (ECCLM) provides the tabulation of the employed CDMA Channel of system for travelling carriage.The extend type of message comprises the information about the availability of quick paging channel, and about on available CDMA Channel, whether supporting the information of transmission diversity.

A plurality of paging channel (walsh function) and/or a plurality of CDMA Channel (frequency) can be supported in the base station.Travelling carriage uses hash function to determine the channel and the frequency that will monitor in idle condition based on its international mobile subscriber identity (IMSI).The base station uses identical hash function to determine channel and the frequency that will use when mobile paging station.

Fig. 6 demonstrates according to one embodiment of present invention, is used for the step of the hash function of Forward Paging Channel (F-PCH).Travelling carriage begins by use the basic paging channel that is transmitted on Walsh channel 1.System parameters message indicates whether to exist a plurality of Walsh channels, and if exist, then travelling carriage uses hash function to select a new Walsh channel.Whether system parameters message also indicates CDMA2000 expansion CDMA Channel List Message just to be sent out on F-PCH.

When obtaining synchronizing channel, ashing technique 600 travelling carriage in step 602 begins.In step 606, travelling carriage obtains paging channel (Walsh 1).After obtaining paging channel, in step 610, travelling carriage receiving system parameter message.Next, in step 614, travelling carriage determines whether system uses a plurality of paging channel.If system has used a plurality of paging channel really, then in step 618, select new paging channel walsh code.After selecting new paging channel walsh code, in step 622, travelling carriage receiving system parameter message.If system does not use a plurality of paging channel, the next procedure in then handling is to determine whether to have sent in step 630 tabulation of expansion CDMA Channel.If system has used a plurality of paging channel really, then selected new paging channel walsh code and received in step 622 after the system parameters message in step 618, travelling carriage advances to step 630 to determine whether to have sent the tabulation of expansion CDMA Channel.If sent the expansion CDMA Channel List Message, then in step 634, it received.If travelling carriage does not receive the tabulation of expansion CDMA Channel, then travelling carriage receives CDMA Channel List Message in step 626.If travelling carriage receives CDMA Channel List Message, then travelling carriage has determined whether that in step 654 a plurality of CDMA Channel just are sent out.If have, then in step 660, travelling carriage uses hash function to select new frequency, is tuned to this frequency and restarts by obtaining with processing expenditure message.If have only a channel to be sent out, then travelling carriage continues the idle condition processing in step 664.

If travelling carriage receives the expansion CDMA Channel List Message in step 634, then travelling carriage determines whether base station and travelling carriage support quick paging channel (QPCH) (step 638) or radio configuration whether greater than 2 (steps 638).If like that, then in the CDMA frequency which base station indicate support those abilities in message, and travelling carriage is only selected from those channels.Step 642 demonstrates determines whether system supports the step of a plurality of CDMA Channel.If do not support, then travelling carriage continues the idle condition processing in step 650.If support that then as mentioned above, travelling carriage proceeds to step 646 with selective channel.

Registration is that travelling carriage is known the processing of the whereabouts of this travelling carriage so as to making cellular system.Cellular system uses the load of registering between balance access channel and the paging channel.Above-described ashing technique is worked with registration, to come dividing frequency according to the load balance log-on operation.Do not having under certain type the situation of registration, must be on whole cellular system mobile paging station, cause for system with a plurality of base stations, each call-delivery all needs to transmit many pagings.Travelling carriage will need the as many number of times of base station number in paged and the system.

Each travelling carriage that just requires when travelling carriage moves to the overlay area of new base station is registered, and can increase the quantity of required paging.Because the transmission of registration message and their affirmation, all can produce on the two big to the load that can't handle at paging channel and access channel.

Cdma system provides multiple mode to initiate registration.Dissimilar registrations can be enabled independently or be forbidden, and this permission cellular carriers customizes out any subclass of register method, with their system of optimization.The selected register method of cellular carriers is the function such as the parameter of the flexibility of cellular system size, intrasystem expection and call-delivery statistical information.The registered type that field in base control parameter message, Extended System Parameters Message and the ANSI-41 system parameters message is supported.

CDMA2000 supports many register methods.These methods are: powering method, down method for electrically, based on the method for timer, based on the method for distance, based on the zone method, order (ordered) method, implicit method, Traffic Channel method, parametric technique and based on the method for user area.

In the CDMA2000 system, also carry out non-autonomous type registration.It is non-autonomous type that the registration of following type is considered to:

The order registration-after the base station sent registration command, travelling carriage was registered to system.Traffic Channel registration-base station can obtain registration about travelling carriage by transmit status request command on Traffic Channel and accepting state response message.The base station can be registered travelling carriage and be notified to travelling carriage by sending the travelling carriage registration message then.

The parameter change registration-when some parameter change of the processing of calling out was transmitted in the influence in the travelling carriage, travelling carriage was registered.These parameters are station class formatives of travelling carriage, preferred slot cycle, and mobile termination designator.

When implicit registration-implicit registration occurs in travelling carriage and successfully sends call message or page-response message.These message are transmitted sufficient information with identification travelling carriage and position thereof.The hierarchical service that registration-CDMA2000 supported based on the user area can require travelling carriage to register when it enters the user area.

The selected register method of cellular carriers is the function such as the parameter of the flexibility of cellular system size, intrasystem expection and call-delivery statistical information.Because system can measure about these sizable change takes place, so the CDMA standard provides above-mentioned multiple register method.Different enrollment process can be enabled independently or be forbidden, thereby allows the use of its system of cellular carriers optimization.

Registration adopts registration message to carry out.Fig. 7 demonstrates the structure of registration message according to an embodiment of the invention.REG TYPE field is used to indicate the registration based on timer, the registration that powers on, based on the registration in zone, electricity registration down, parameter change registration and order registration or based on the registration of distance.

Registration can be one of following two types: autonomous type and non-autonomous type.In the autonomous type registration, travelling carriage is initiated registration in response to incident, and is not registered by the guiding of base station controller explicitly.The autonomous type registration of six kinds of forms is arranged, and they are as described below: the registration that powers on-when travelling carriage powers on, when use substituted service system and switches, perhaps when using the analogue system switching, travelling carriage was registered.

If following electricity registration-travelling carriage before had been registered in the current service system, then when travelling carriage was electric down, travelling carriage was registered.

Based on the registration of timer-when the timer expiration, travelling carriage is registered.

Based on the registration of distance-when once the distance between the Serving cell of registration surpassed threshold value therein on current service cell and travelling carriage, travelling carriage was registered.

Based on the registration in zone-when travelling carriage enters newly when regional, travelling carriage is registered.

Various forms of autonomous type registrations can be enabled all sidedly or forbid by base station controller.Registration form that is activated and corresponding registration parameter are transmitted in the Overhead Message that is transmitted on the CDMA paging channel.

Non-autonomous type register method comprises: command method, Traffic Channel method, parameter change method and implicit method.When all non-autonomous type register methods all are provided at the order on the paging channel responded or use access channel or Traffic Channel, upgrade the ability of attaching position register (HLR)/VLR Visitor Location Register (VLR).

Cellular system can be known the such travelling carriage in its overlay area: cellular system does not have (for example, after travelling carriage receives call message) and transmits all the required information of calling out for it.In this case, cellular system can use request command to come the order travelling carriage to register.

Fig. 8 demonstrates according to one embodiment of present invention, the field that comprises in the structure of request command and this order.Travelling carriage is made response with the registration message on the access channel to request command, and for other registers its data structure of renewal arbitrarily.

Another kind of non-autonomous type registration is the Traffic Channel registration.The Traffic Channel registration is meant the method that receives registration related information when travelling carriage is on Traffic Channel.Owing to compare with the exchange that takes place on paging and the access channel, information exchange on the Traffic Channel is littler to the interference that other users cause, so cdma system can provide the transmission of the register information on the Traffic Channel, thereby prevent to follow many situations of the automatic registration after calling.A calling that example relates to switch between system of this registration may take place.

Provide register information to travelling carriage, can after travelling carriage receives release command and before release command is transferred to travelling carriage, finish.In this stage, the information exchange between base station and the travelling carriage is to not influence of voice quality.

Fig. 9 demonstrates the structure of parameter change registration according to an embodiment of the invention.Some parameter in the travelling carriage can directly influence the processing of calling out to the travelling carriage transmission, and therefore no matter when change has taken place for they, all should be updated in system.These parameters are station class formatives (SCM) of travelling carriage, preferred slot cycle, and mobile termination designator.

Can append on the vehicle and can be removed then and be used as in the travelling carriage of portable phone, SCM can change.Because under these different situations, travelling carriage will be launched different power and have different receiving abilities, thus should make the base station know this change, so that the base station can be used in this information in its call-delivery algorithm.

Preferred slot cycle index is meant only monitors in selected time slot of some CDMA phone, thereby reduces the ability of handling load and increasing battery life.The base station of attempting mobile paging station will be appreciated that the slot cycle that travelling carriage is using, so that paging can be transmitted in the base station in those time slots of travelling carriage monitors.

Travelling carriage keeps calling out the termination designator.The CDMA phone can be programmed independently, when being in the overlay area of the base station that belongs to the system (" ownership " system) that service is provided with box lunch, when roaming (network identity " NID " ramber) in service system but in different networks or call accepted when roaming (system banner " SID " ramber) in different systems.

Therefore, call out the function that stops the roaming state that designator is a travelling carriage and stop preference (call termination preference) for the calling of this roaming state programming.Change (because the change of roaming state or change of preference) if call out to stop designator, then should informing base station in case the base station can determine whether and transmit paging to travelling carriage.

When travelling carriage and base station exchange message, but this message does not directly relate to registration when cellular system is passed on the full information of identification travelling carriage and (in base station coverage area) position thereof, implicit registration takes place.

For with other wireless communication system in other recording plan compatibility of using, travelling carriage thinks that it only carries out implicit registration after successfully transmitting call message or page-response message.

In routine operating period, travelling carriage can provide state to upgrade to system in call message and page-response message.This ability has reduced the quantity of required registration message.

Figure 10 demonstrates field required in the call message according to an embodiment of the invention.The call message that is sent by travelling carriage comprises the enough information that is used for implicitly registering MS.

About near the paging of the travelling carriage of working system boundary, it is known that many problems are arranged.Have among these problems: be used for paging moves to the travelling carriage of another system from a system definite problem of suitable base station controller (BSC).Autonomous registration after each system changes helps to address this problem, but can not solve fully.Because registration can't be instant, so there is certain period all the time, does not know that at this section time durations attaching position register (HLR) travelling carriage has changed service system.

If when each travelling carriage enters sub-district in the new service system autonomous registration takes place, then another problem can occur: at the travelling carriage of registering after each change of service system in the registration request that when system boundary moves, can send excessive number.This is that the optimal service system of thinking from the viewpoint of travelling carriage promptly changes because propagation effect can cause when travelling carriage is in the motion.

It is SID_NID_LIST that travelling carriage keeps the tabulation of its registered therein system banner number (SID) and mobile network identification number (NID).When travelling carriage registers to given (SID/NID) centering, its with this to adding in the tabulation and for corresponding to starting timer with its before registered therein SID and NID.If travelling carriage turns back to the overlay area that belongs to (SID/NID) the right base station in its tabulation, then it is not set up new registration procedure.In case timer expiration, travelling carriage are just deleted be associated with timer right from tabulation.If travelling carriage happens to be in the overlay area of base station of (SID/NID) that belong to timer expiration, then it is set up new registration procedure, and under having the situation of timer this is not got back in the tabulation interpolation.

BS can control a plurality of SID and/or the NID storage in the SID_NID_LIST of travelling carriage by MULT_SIDS and the MULT_NIDS parameter that sends in the using system parameter message.

Figure 11 demonstrates the field and the field length of system parameters message according to an embodiment of the invention.When MULT_SIDS is set to zero, travelling carriage will not stored a plurality of clauses and subclauses with identical SID.Like this, when travelling carriage registered specific (SID, NID) to the time, it just from the tabulation remove have different SID another to (if present).Similarly, when MULT_NIDS is set to zero, for registered therein each NID of travelling carriage, travelling carriage only store one (SID, NID) right.

The registered type that system parameters message control will be used in system.According to this Overhead Message, travelling carriage can be determined the type that will use and the value of operation.

The REG_ZONE field is set to the registration zone of base station.The TOTAL_ZONES field is configured to travelling carriage for based on the purpose of the registration in zone and the quantity of the registration zone that will keep.ZONE_TIMER is provided with the length of the regional Registry Timer that will be used by travelling carriage.The scope of ZONE_TIMER is from 1 to 60 minute.

The key component of registration process is that frequency of operation is distributed to travelling carriage.This Frequency Distribution also has the implication for entire system.Should cross over a plurality of frequencies and bandwidth assignment travelling carriage,, and system operating parameters be remained in its optimum range so that make minimum interference.The target of registration process comprises: idle mobile stations is assigned between the frequency band, make realization time minimization to the change of registration process, make message minimize (the particularly registration that changes about frequency band), avoid travelling carriage to point to again and redistribute, and avoid using second paging channel (this can use power and have a negative impact and need second walsh code).

Revising the hash processing can make systematic function be improved.Under the situation that the diversity of travelling carriage and base station ability increases, if can improve hash by making the operator have the control that increases when a plurality of frequency bands of configuration and/or the frequency, then systematic function can be enhanced.Various embodiments of the present invention provide hash and/or have pointed to feature again.Enhancing discussed above can realize by the change to hash and/or sensing processing again.

Various embodiment of the present invention will be by utilizing hash between frequency band, expansion CDMA Channel List Message of use revising (ECCLM) and/or the expansion world business redirect message of revising (EGSRDM) are provided for travelling carriage is assigned to improved mechanism on the frequency band.

In one embodiment of the invention, the enhancing of ECCLM is provided the hash of the improvement of controlling based on the mobile station capability of complexity.Complicated ability control can comprise common signal channel (for example, broadcasting, paging channel etc.), Traffic Channel and the service of being supported.These abilities can be configured in the ability overview of travelling carriage, and when the mark among the ECCLM that strengthens guided travelling carriage based on ability control execution hash, this travelling carriage hashed on the particular channel based on the channel that is identified among the ECCLM.

Figure 12 shows the ability control of channel hash according to an embodiment of the invention.Expansion CDMA Channel List Message (ECCLM) comprises the ability control field, and this field can dispose according to the bit or the bit combination (bit pattern) of any number.In addition, each bit of ability control field can be grouped, with the priority of providing capability control when being used for hashing to a specific frequency of ECCLM frequency appointed.

In another embodiment of the present invention, the enhancing of EGSRDM allowed to select based on specific mobile station capability and to channel the control that improves.In order to expand the control ability that frequency is selected and therefore to expand, strengthen EGSRDM, in EGSRDM, to comprise a plurality of records that point to again to the control ability of redistributing of travelling carriage in system.

Figure 13 shows and comprise a plurality of one embodiment of the present of invention of pointing to record again in the EGSRDM that strengthens.Again during another that points to the EGSRDM that strengthens a plurality of realized more specifically, one or more follow-up records that point to again comprised the ability control field that can dispose according to the bit and the bit combination of any number.In addition, each bit of ability control field can be grouped, with the priority of providing capability control when being used to that travelling carriage pointed to characteristic frequency again.

In another embodiment of the present invention, the enhancing of ECCLM needn't the experience system be determined by making travelling carriage can be transformed into idle condition in selective channel from ECCLM and after being transformed into this channel, and systematic function can be improved.Figure 12 shows mark or other designator among the ECCLM of enhancing, and it guides travelling carriage selecting and be transformed into channel (for example, channel is redistributed) afterwards, and whether abandon carrying out about channel is that system between frequency band determines to handle.

In another embodiment of the present invention, the enhancing of EGSRDM needn't the experience system be determined by making travelling carriage can be transformed into idle condition in selective channel and after being transformed into this channel, and systematic function can be improved.Figure 13 shows mark or other designator among the EGSRDM of enhancing, and it guides travelling carriage identification channel in redirect message to point to (for example, channel is redistributed) again and be transformed into after this channel that points to again, abandons executive system and determines to handle.

Novelty and the method and apparatus that improve that is used for redistributing in communication system travelling carriage like this, has been described.Those skilled in the art be appreciated that the data mentioned in the above-mentioned explanation, instruction, order, information, signal, bit, symbol, and chip can advantageously be expressed as voltage, electric current, electromagnetic wave, magnetic field or magnetic particle, light field or light particle or above any combination.The professional and technical personnel can also further recognize, the logical block of the various examples of describing in conjunction with embodiment disclosed herein, module, circuit, and algorithm steps can be implemented with electronic hardware, computer software or the combination of the two.

Assembly, chunk, module, circuit, and the step of various examples have been described prevailingly according to function.This function still is that software mode is realized with hardware actually, depends on the specific application and the design constraint of whole system.The professional and technical personnel can recognize the interchangeability of the hardware and software under these situations, and can recognize and how to realize described function best for each specific application.

As an example, logical block, module, circuit and the algorithm steps of the multiple example of describing in conjunction with embodiment disclosed herein can be with processor, any conventional programmable software modules and the processor of digital signal processor (DSP), application-specific integrated circuit (ASIC) (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components (such as register and FIFO etc.), one group of firmware instructions of execution or the above combination in any that is designed to carry out function described herein realize or carry out.

Processor is microprocessor advantageously, but replacedly, processor also can be processor, controller, microcontroller, programmable logic device, array of logic elements or the state machine of any routine.Software module can reside in the storage medium of any other form known in RAM memory, flash memory, ROM memory, eprom memory, eeprom memory, register, hard disk, moveable magnetic disc, CD-ROM or the technical field.Exemplary processor advantageously can be connected to storage medium, so that from read information and to the storage medium writing information.

Replacedly, storage medium can be integrated in the processor.Processor and storage medium can place ASIC.ASIC can place phone or other user terminal.Replacedly, processor and storage medium can place phone or other user terminal.Processor may be implemented as the combination of DSP and microprocessor, perhaps is implemented as the combination of two microprocessors and a DSP core etc.

In a further embodiment, those professional and technical personnel in this area will be understood that, the program that preceding method can pass through to comprise on the object computer computer-readable recording medium (such as, the memory of computer platform) realizes.Instruction can reside in various types of signal bearing mediums or data storage primary, secondary or the 3rd medium.Medium can comprise: for example, can by the RAM of customer equipment and/or server access or place customer equipment and/or server in RAM.No matter be included in RAM, disk still is in other secondary storage media, instruction can be stored on the various machine-readable data storage media, such as the DASD memory (for example, conventional " hard disk drive " or RAID array), tape, electronically erasable read only memory (for example, ROM or EEPROM), flash card, optical storage apparatus (for example, CD-ROM, WORM, DVD, digital optical tape), paper " perforation " card or comprise other data storage medium that is fit to of numeral and analogue transmission medium.

Although foregoing disclose shows illustrative embodiment of the present invention, it should be noted that and under the situation that does not break away from the scope of the present invention that is defined by the following claims, to carry out various changes and modification the present invention.The activity of the claim to a method according to an embodiment of the invention of Miao Shuing or step need not carried out according to any specific order herein.In addition, although key element of the present invention may be described or claim to odd number, a plurality of key elements also can be anticipated, unless clearly stated the restriction of odd number.

The preferred embodiments of the present invention like this, have been illustrated and have described.Yet, it is evident that for those of ordinary skill in the art, can under the situation that does not break away from the spirit or scope of the present invention, carry out many changes to embodiment disclosed herein.Therefore, except with following claim serve as according to, the present invention is not limited by other.

Claims (35)

1. method comprises:

To redistribute change record appends to common signal channel and redistributes message; With

Redistribute the ordering that change record changes travelling carriage based on described.

2. the step of the method for claim 1, wherein described change ordering comprises, when redistributing the change record indication and abandoning system and determine, it is definite to abandon system the channel of described travelling carriage is redistributed after when described.

3. method as claimed in claim 2, wherein, it is one of expansion CDMA Channel List Message (ECCLM) and expansion world business redirect message (EGSRDM) that described common signal channel is redistributed message.

4. the step of the method for claim 1, wherein described change ordering comprises, changes selection to the channel that is used for described travelling carriage based on the described change record of redistributing.

5. method as claimed in claim 4 further comprises, changes selection to channel based on the ability of described travelling carriage.

6. method as claimed in claim 5, wherein, it is one of expansion CDMA Channel List Message (ECCLM) and expansion world business redirect message (EGSRDM) that described common signal channel is redistributed message.

7. method that is used for a plurality of travelling carriages are re-assigned to a plurality of channels of communication system comprises:

Generation is used to append to the change record of redistributing that common signal channel is redistributed message; With

Redistribute change record and described common signal channel is redistributed message by the common signal channel in described communication system transmission is described.

8. method as claimed in claim 7, wherein, the step that change record is redistributed in described generation comprises, change record is redistributed in generation, when redistributing change record indication and abandoning system and determine, abandon system after the channel of described at least one travelling carriage in described a plurality of travelling carriages is redistributed and determine described to guide at least one travelling carriage in described a plurality of travelling carriage.

9. method as claimed in claim 8, wherein, it is one of expansion CDMA Channel List Message (ECCLM) and expansion world business redirect message (EGSRDM) that described common signal channel is redistributed message.

10. method as claimed in claim 7, wherein, the step that change record is redistributed in described generation comprises, change record is redistributed in generation, changes selection to the channel of a travelling carriage being used for described a plurality of travelling carriages to guide at least one travelling carriage in described a plurality of travelling carriage based on the described change record of redistributing.

11. method as claimed in claim 10 further comprises, changes selection to channel based on the ability of described at least one travelling carriage in described a plurality of travelling carriages.

12. method as claimed in claim 11, wherein, it is one of expansion CDMA Channel List Message (ECCLM) and expansion world business redirect message (EGSRDM) that described common signal channel is redistributed message.

13. a method that is used for changing the ordering of travelling carriage comprises:

Receiving common signal channel redistributes message and redistributes change record; With

Change ordering in the described travelling carriage based on the described change record of redistributing.

14. method as claimed in claim 13, wherein, the step of described change ordering comprises, when redistributing the change record indication and abandoning system and determine, it is definite to abandon system the channel of described travelling carriage is redistributed after when described.

15. method as claimed in claim 14, wherein, it is one of expansion CDMA Channel List Message (ECCLM) and expansion world business redirect message (EGSRDM) that described common signal channel is redistributed message.

16. method as claimed in claim 13, wherein, the step of described change ordering comprises, changes selection to the channel that is used for described travelling carriage based on the described change record of redistributing.

17. method as claimed in claim 16 further comprises, changes selection to channel based on the ability of described travelling carriage.

18. method as claimed in claim 17, wherein, it is one of expansion CDMA Channel List Message (ECCLM) and expansion world business redirect message (EGSRDM) that described common signal channel is redistributed message.

19. a computer-readable medium comprises the computer executable instructions that is used for a plurality of travelling carriages are re-assigned to a plurality of channels of communication system, described computer executable instructions is used for:

Generation is used to append to the change record of redistributing that common signal channel is redistributed message; With

Redistribute change record and described common signal channel is redistributed message by the common signal channel in described communication system transmission is described.

20. computer-readable medium as claimed in claim 19, wherein, it is one of expansion CDMA Channel List Message (ECCLM) and expansion world business redirect message (EGSRDM) that described common signal channel is redistributed message.

21. computer-readable medium as claimed in claim 19, wherein, describedly be used to generate the computer executable instructions of redistributing change record and comprise, change record is redistributed in generation, changes selection to the channel of a travelling carriage being used for described a plurality of travelling carriages to guide at least one travelling carriage in described a plurality of travelling carriage based on the described change record of redistributing.

22. computer-readable medium as claimed in claim 21 further comprises, the ability based on described at least one travelling carriage of described a plurality of travelling carriages of being used for changes the computer executable instructions to the selection of channel.

23. a computer-readable medium comprises the computer executable instructions of the ordering that is used for changing travelling carriage, described computer executable instructions is used for:

Receiving common signal channel redistributes message and redistributes change record; With

Change ordering in the described travelling carriage based on the described change record of redistributing.

24. a base station that is used for a plurality of travelling carriages are re-assigned to a plurality of channels of communication system comprises:

Be used to generate and be used to append to the device of redistributing change record that common signal channel is redistributed message; With

Be used for that common signal channel transmission by described communication system is described redistributes the device that change record and described common signal channel are redistributed message.

25. base station as claimed in claim 31, wherein, being used to generate the device of redistributing change record comprises, be used for generating and redistribute change record, when redistributing change record indication and abandoning system and determine, after redistributing, the channel of described at least one travelling carriage in described a plurality of travelling carriages abandons the device that system determines described to guide at least one travelling carriage in described a plurality of travelling carriage.

26. base station as claimed in claim 32, wherein, it is one of expansion CDMA Channel List Message (ECCLM) and expansion world business redirect message (EGSRDM) that described common signal channel is redistributed message.

27. base station as claimed in claim 31, wherein, describedly be used to generate the device of redistributing change record and comprise, be used for generating and redistribute change record, redistribute change record and change device in response to described the selection of the channel of a travelling carriage being used for described a plurality of travelling carriages to guide at least one travelling carriage in described a plurality of travelling carriage.

28. base station as claimed in claim 34 further comprises, the ability based on described at least one travelling carriage of described a plurality of travelling carriages of being used for changes the device to the selection of channel.

29. base station as claimed in claim 35, wherein, it is one of expansion CDMA Channel List Message (ECCLM) and expansion world business redirect message (EGSRDM) that described common signal channel is redistributed message.

30. a travelling carriage comprises:

Be used to receive the device that common signal channel is redistributed message and redistributed change record; With

Be used for redistributing the device that change record changes the ordering of described travelling carriage based on described.

31. travelling carriage as claimed in claim 37, wherein, the described device that is used to change ordering comprises, is used for abandoning the definite device of system when the change record indication is abandoned system and determined described redistributing the channel of described travelling carriage is redistributed after.

32. travelling carriage as claimed in claim 38, wherein, it is one of expansion CDMA Channel List Message (ECCLM) and expansion world business redirect message (EGSRDM) that described common signal channel is redistributed message.

33. travelling carriage as claimed in claim 37, wherein, the described device that is used to change ordering comprises, is used for changing device to the selection of the channel that is used for described travelling carriage based on the described change record of redistributing.

34. travelling carriage as claimed in claim 40 further comprises, the ability based on described travelling carriage of being used for changes the device to the selection of channel.

35. travelling carriage as claimed in claim 41, wherein, it is one of expansion CDMA Channel List Message (ECCLM) and expansion world business redirect message (EGSRDM) that described common signal channel is redistributed message.

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