CN100450284C - Implementation method for switching terminals in wireless communication system - Google Patents
Implementation method for switching terminals in wireless communication system Download PDFInfo
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- CN100450284C CN100450284C CNB2005100735013A CN200510073501A CN100450284C CN 100450284 C CN100450284 C CN 100450284C CN B2005100735013 A CNB2005100735013 A CN B2005100735013A CN 200510073501 A CN200510073501 A CN 200510073501A CN 100450284 C CN100450284 C CN 100450284C
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Abstract
The present invention relates to an implementation method for switching terminals in a wireless communication system, which mainly comprises that when a group of mobile terminals in a wireless communication system (such as a WiMAX system) need to be switched and processed, identification information (such as an MSS list) of each mobile terminal in the mobile terminals is loaded and born in switched information, and the switched information is passed in the wireless communication system. In such a way, in the wireless communication system, each mobile terminal can be switched and processed according to the switched information. Thus, because only a piece of information is adopted in the present invention to switch and process a batch of MSS, the amount of the information in the wireless communication system is largely reduced, the transmission efficiency is high in the process of switching, and the time delay for the switching is greatly shortened. In a word, the implementation method for the MSS switching in the wireless communication system provided by the present invention has the advantages that the efficiency in the switching process is high, and corresponding communication efficiency can be ensured.
Description
Technical field
The present invention relates to network communications technology field, relate in particular to and realize the method that terminal is switched in a kind of wireless communication system.
Background technology
IEEE 802.16 has defined the fixedly wireless metropolitan area network standard of BWA (broadband wireless access).Described standard pin has defined different physical-layer techniques to different frequency range.The range of application of described standard is mainly towards dwelling house, SOHO (small office/family office), teleworker and SME (user of small enterprise) market.
IEEE 802.16MAC (medium access control) supports very disadvantageous user environment, can deal with the applied environment that has hundreds and thousands of users on each channel, supports different traffic carrying capacitys such as continous way and burst type.It has ATM (asynchronous transfer mode) convergence sub-layer and grouping convergence sub-layer, send by being packaged into a MAC PDU (Medium Access Control (MAC) Protocol Data Unit) after a plurality of high level datas unit is handled through convergence sub-layer, can realize protocol transparency ATM, IP and Ethernet service.
WiMAX is a world microwave access mutual operability industry organization, is intended to promote the promotion and application of the serial air protocol of IEEE 802.16 (IEEE 802.16, IEEE 802.16d, IEEE 802.16e) in the whole world.Wima * the be meant network entity that satisfies IEEE 802.16 air protocol.
The end-to-end reference model of WiMAX as shown in Figure 1, and Fig. 1 is the end-to-end reference model of the WiMAX under the roaming condition.Among Fig. 1, WiMAX comprises with the lower part:
ASN-Access Service Network, i.e. access service network
ASN is defined as the network function set that the wireless access service is provided for the WiMAX terminal, and ASN has comprised BS (base station) and ASN GW (ASN gateway) network element, and an ASN may be shared by a plurality of CSN (connectivity serving network);
The reference model of described ASN as shown in Figure 2, it mainly provides following function:
(1) function of BS:
1, provide the L2 (two layers) of BS and SS (subscriber station)/MSS (travelling carriage) to be connected;
2, RRM;
3, measurement and power control;
4, the eat dishes without rice or wine compression and the encryption of data;
(2) function of ASN GW:
1, provides proxy (agency) function for SS/MSS authentication function.；
2, support the network of NSP (Network Service Provider, network provider) to find and selection;
3, provide L3 (three layers) Relay (time-delay) function (as IP address assignment) of information for SS;
Except above-mentioned functions, can also comprise (non-essential function):
1, switches in the ASN;
2, SS paging and location management;
3, tunnel management between the ASN-CSN;
4, vision location registration.
Also comprise among Fig. 1: CSN (Connectivity Service Network, connectivity serving network), described CSN are defined as to the WiMAX terminal IP are provided Connection Service;
Described CSN mainly provides the function of the following:
1, the IP address assignment of SS/MSS;
2, Internet inserts;
3, AAA proxy (authentication charging proxy) or server (server);
4, based on user's authorization control;
5, ASN is to the tunnel of CSN;
6, WiMAX user's charging and the clearing between the operator;
7, the tunnel between the CSN under the roaming condition;
8, the switching between the ASN;
9, various WiMAX services are as location-based business, multi-medium multi-packet broadcasting and broadcasting service, IP Multimedia System business.
Also comprising among Fig. 1: MSS/SS{ (Mobile) Subscriber Station, travelling carriage/user, described MSS/SS is (moving) subscriber equipment, the user uses this MSS/SS devices accessing WiMAX network.
Because portable terminal has the needs of mobile characteristic and network load adjustment, may often need carry out corresponding hand-off process to the corresponding mobile terminal in the WiMAX network, thereby realize portable terminal is switched to another zone from a zone.
In existing switching flow, be divided into the switching of MSS initiation and the switching that network is initiated.Described switching is divided into two stages again: handoff preparation phase and actual switch step.
In handoff preparation phase, use the primitive in the following table 1:
Table 1, handoff preparation phase control messages
| Primitive | Direction | Parameter |
| HO Request/ handoff request | Serving BS-＞ASN GW/ serving BS broadcasts is to the ASN gateway | Serving BS ID (serving BS broadcasts sign), Candidate Target BS ID list (the target BS tabulation of candidate), MSS_ID (MSS sign), the MSS QoS Profile ID (MSS quality of service policy sign), MSS/Session Info Report (session information report), Info_Support_HO_Optimizatio (supporting handover optimization information). |
| HO Pre-Notification/ switches pre-notice | ASN GW-＞Target BS Or Serving BS-＞Target BS (R8) | Serving BS ID, MSS_ID, Info_Support_HO_Optimization, Session Info Report. |
| HO Pre-Notification Response/ switches pre-push-notification-answer | Target BS-＞ASN GW Or Target BS-＞Serving BS | Target BS ID (target BS sign), MS_ID, SLP (Service Level Prediction, grade of service prediction), MSS QoS Profile ID |
| (R8) | Profile ID, Info_Support_HO_Optimization, success/fail flag (success or failure sign), etc (or the like). | |
| HO Response/ handoff response | ASN GW-＞Serving BS | Serving BS ID, Recommended Target BS ID list (the target BS tabulation of recommendation), MSS_ID |
| HO Directive/ switches indication | ASN GW-＞Serving BS | MSS_ID, Recommended Target BS ID list, Info_Support_HO_Optimization, the MSS QoS Profile ID, MSS/Session Info Report. |
| HO Directive Response/ switches the indication response | Serving BS-＞ASN GW | MSS ID, success/fail flag. |
In the table 1, the BS before Serving BS representative is switched, Target BS represents target BS, promptly may switch the BS of access.
Actual switch step is used primitive in the table 2, the actual switch step control messages of table 2:
| Primitive | Direction | Parameter |
| HO Indication/ switches expression | Serving BS-＞ASN GW | MSS ID，Target BS ID |
| HO Confirmation/ switches affirmation | ASN GW-＞Target BS Or Serving BS-＞Target BS | MSS ID，Session Info Report |
As can be seen, in the switching primitive that above-mentioned prior art provides, all be to prepare for the switching of single MSS about the message primitive that switches.Yet, in actual application, may need simultaneously a collection of MSS to be carried out same handover operation.At this moment, if adopt primitive in above-mentioned table 1 and the table 2, have to transmit repeatedly primitive message in the time of then will may causing switching a large amount of MSS, specifically as shown in Figure 3 and Figure 4 owing to the unicity of primitive message.And then making efficiency of transmission low, handover delay increases.Such as, because for to avoid the load of the network equipments such as ASN GW excessive,, need send corresponding message one by one according to existing procedure when needs initiation during to the switching flow of a lot of MSS, this must increase the needed time of hand-off process, increases handover delay.
Therefore, the implementation method that MSS in the wireless communication system that provides in the above-mentioned prior art switches makes the handoff procedure inefficiency, thereby is difficult to guarantee the efficient of communicating by letter.
Summary of the invention
In view of above-mentioned existing in prior technology problem, the purpose of this invention is to provide and realize the method that terminal is switched in a kind of wireless communication system, this method can effectively improve the efficient that portable terminal switches, make the needed time of hand-off process of large quantities of portable terminals shorten greatly, and whole handoff process can not increase the burden of treatment facility.
The objective of the invention is to be achieved through the following technical solutions:
The invention provides and realize the method that terminal is switched in a kind of wireless communication system, comprising:
A, in the time need carrying out hand-off process to one group of portable terminal in the wireless communication system, then the identifying information of each portable terminal in described one group of portable terminal is carried on and switches in the message, and in wireless communication system, transmit described switching message;
B, in wireless communication system, carry out the hand-off process of each portable terminal according to described switching message.
Described wireless communication system comprises: micro-wave access to global intercommunication WiMAX system.
Described steps A comprises:
When determining that according to the handoff request of network side or user side initiation needs carry out hand-off process at least two portable terminals by the network side in the WiMAX system, and when described target BS is same base station, then the identifying information unification of each portable terminal is carried on same and switches in the message and send to target BS.
Described steps A comprises:
A1, when access service network gateway ASN GW and/or serving BS are determined to carry out hand-off process to one group of portable terminal, then the identifying information of each portable terminal is carried on one and switches and prepare to send to corresponding target BS in the notification message.
Loaded information comprises in the described switching preparation notification message:
The quantity of portable terminal, the sign of each portable terminal, support handover optimization information, session information report.
Described steps A 1 comprises:
Target BS returns the response message that notice is prepared at least one switching to described ASN GW or serving BS.
Loaded information comprises in the response message that described switching prepares to notify:
The service quality sign of the quantity of handover success/failure flags, portable terminal, the sign of portable terminal, portable terminal and/or support handover optimization information.
Described steps A also comprises:
A2, for the handoff procedure of initiating by described ASN GW, described ASN GW need send the switch indicating information of at least one portable terminal identifying information of carrying to serving BS.
Loaded information comprises in the described switch indicating information:
The quantity of portable terminal, the sign of recommending target BS, support handover optimization information, portable terminal service quality sign and/or session information report.
Described steps A 2 also comprises:
Described serving BS returns at least one switching that comprises each portable terminal identifying information to described ASN GW and indicates response message.
Loaded information comprises in the described switching indication response message:
The quantity of handover success/failure flags, portable terminal and/or the sign of portable terminal.
Described steps A comprises:
A3, when serving BS determines to carry out hand-off process to one group of portable terminal, serving BS judges whether self can handle, if can, then send described switching to target BS and prepare notification message by serving BS, otherwise, can send handoff request message to ASN GW, and send described switching preparation notification message to target BS by ASNGW.
Loaded information comprises in the described handoff request message:
The quantity of portable terminal, each mobile terminal identification, candidate's target BS, portable terminal service quality sign, session information report and/or support handover optimization information.
Described steps A 3 also comprises:
ASN GW returns the response message of handoff request to serving BS.
Loaded information comprises in the response message of described handoff request:
The identification list of the target BS of the quantity of portable terminal, the sign of each portable terminal, recommendation or the identification list of candidate target BS.
Described steps A 3 also comprises:
When having carried the identification list of candidate target BS in the response message of the handoff request that serving BS is received, then need from the identification list of described candidate target BS, to select the target BS identification list of corresponding recommendation.
Realize in the described wireless communication system that the method that terminal is switched also comprises:
After the serving BS of portable terminal is determined handover success,, each portable terminal unification switches expression message for sending to ASN GW;
Described ASN GW represents that according to described switching the message unification sends corresponding switch acknowledgment message to target BS.
Described switching represents that the information of message bearing comprises: the sign of the quantity of portable terminal, the sign of each portable terminal and target BS;
Described switch acknowledgment message loaded information comprises: the quantity of portable terminal, the sign of each portable terminal and session information report.
The form of described switching message can adopt type lengths values TLV form.
As seen from the above technical solution provided by the invention, to switch message primitive among the present invention and be revised as the identification information that to indicate one group of MSS that need switch, therefore, in actual application, can adopt a piece of news simultaneously a collection of MSS to be carried out hand-off process.Greatly reduce the number of the message in the wireless communication system, make that efficiency of transmission is higher in the handoff procedure, handover delay shortens greatly.
Therefore, the implementation method that the MSS in the wireless communication system provided by the invention switches makes handoff procedure can have higher efficient, and can guarantee the efficient of corresponding communication.
Description of drawings
Fig. 1 is end-to-end reference model schematic diagram;
Fig. 2 is the reference model schematic diagram of ASN;
Fig. 3 is the handoff process schematic diagram that ASN GW initiates in the prior art;
Fig. 4 is the handoff process schematic diagram that SBS initiates in the prior art;
The handoff process schematic diagram that Fig. 5 initiates for ASN GW among the present invention;
The handoff process schematic diagram that Fig. 6 initiates for SBS among the present invention.
Embodiment
Core of the present invention provides a kind of setting of the new message format in handoff process, the relevant information of a collection of MSS that this message format can switch needs (being the MSS tabulation) once sends to corresponding network entity, thereby make in the handoff process based on the switching message of this form, switching for many MSS has increased efficiency of transmission greatly, reduces handover delay.
The present invention is in implementation procedure, mainly be the existing part of WiMAX to be switched message make amendment, described switching message comprises: HO Pre-Notification message, HO Pre-NotificationResponse message, HO Directive message and HO Directive Response message; Be used to identify the MSS tabulation of one group of information of mobile terminal in above-mentioned switching message interpolation, and in the handoff process of ASN GW or S-BS initiation, can make one to switch the identifying information that message is carried a plurality of MSS, make that switching is more efficient, alleviate the transmission burden.
Simultaneously, among the present invention, during S-BS initiates in by the WiMAX system hand-off process, can be to give ASN GW with the MSS tabulation that needs switch by HO Request message to handle, after disposing, ASNGW returns HO Response.Wherein, all need to add the MSS list information in described HO Request message, HOResponse message, HO Pre-Notification message, the HO Pre-Notification Response message.
Mainly be that the switching message of handoff preparation phase has been done a little processing among the present invention, and carry out corresponding hand-off process based on the amended switching message that can carry one group of portable terminal handover information.For the present invention there being further understanding, method of the present invention is further described below in conjunction with accompanying drawing.
With the WiMAX system is example, and corresponding handoff procedure comprises the handoff process that handoff process that ASN GW initiates and SBS initiate, and the switching message that is applied in two kinds of handoff procedures is different.Below will be respectively the form of corresponding switching message be described.
At first, when ASN GW when switching the promoter, the form of the control messages of concrete handoff preparation phase is as shown in table 3:
Table 3 handoff preparation phase control messages is improved
| Primitive | Direction | Parameter |
| HO Pre-Notification | ASN GW-＞Target BS Or Serving BS-＞Target BS (R8) | Serving BS ID, MSS_list (MSS tabulation) { N_MSS (MSS quantity), MSS_ID, Info_Support_HO_Optimization (supporting handover optimization information), Session Info Report (session information report) } |
| HO Pre-Notification Response | Target BS-＞ASN GW Or Target BS-＞Serving BS (R8) (having the R8 interface) | Target BS ID，MSS_list{N_MSS， MSS_ID，SLP，MSS QoS Profile ID， Info_Support_HO_Optimization ， success/fail flag，etc.} |
| HO Directive | ASN GW-＞Serving BS | MSS_list{N_MSS，MSS_ID， Recommended Target BS ID list， Info_Support_HO_Optimization，the MSS QoS Profile ID，MSS/Session Info Report} |
| HO Directive Response | Serving BS-＞ASN GW | MSS_list{N_MSS，MSS ID， success/fail flag} |
As can be seen from the above table, the present invention has done the parameter of message partly and adjusted, and is main referring to the boldface type part in the table 3; For example, the parameter of HO Pre-Notification message, by original Serving BSID (serving BS sign), MSS_ID (mobile terminal identification), Info_Support_HO_Optimization (supporting handover optimization information), Session InfoReport (session information report), be revised as: Serving BS ID, MSS_list{N_MSS, MSS_ID, Info_Support_HO_Optimization, Session Info Report}, described MSS_list represents the tabulation of MSS, is used to carry the identifying information of one group of portable terminal that need switch, the quantity of the MSS that the needs that N_MSS comprises in representing to tabulate switch.
Need to prove content that the tabulation MSS_list of each MSS in above-mentioned table comprises be not limited to show in the content of record, in actual application, can increase as required or reduce.
Be that example describes each form that switches message of revising among the present invention with HO Pre-Notification message more below.Described HO Pre-Notification message is as shown in table 4:
Table 4 is the form of HO Pre-Notification message
| Grammer | Size (bits) | Note |
| HO Pre-Notification_Message_Format(){ | -- | The form of HO Pre-Notification is as follows |
| Serving BS ID | 48 | The sign of serving BS broadcasts |
| MSS_list{ | -- | The tabulation of MSS |
| N_MSS | N | The quantity of MSS, size is undetermined |
| For(j＝0；j＜N_MSS；j++){ | -- | Each MSS has following field |
| MSS_ID | 48 | The sign of MSS |
| Info_Support_HO_Optimization | N | Size is undetermined |
| Session Info Report | N | Size is undetermined |
| }} | -- |
Concrete form of message in above-mentioned table 4 and part field size are undetermined; The concrete form of other HO Pre-Notification Response message, HO Directive message, HO Directive Response message and the form of the HO Pre-Notification message in the table 4 are similar.
The message format of the present invention's definition does not influence the switching processing to single MSS, such as, at this moment switching that MSS initiates and network, as long as the N_MSS field is made as 1, promptly have only a MSS to switch to the switching of single MSS, and other handling processes are constant.
For described message format, can also use the form of TLV (Type Length Value, type lengths values) to realize, as shown in table 5:
Table 5
| Grammer | Size (bits) | Note |
| HO Pre-Notification_Message_Format(){ | -- | The form of HO Pre-Notification |
| Serving BS ID | 48 | The sign of serving BS broadcasts |
| MSS_list{ | -- | The tabulation of |
| MSS_list_TYPE | ||
| 8 | The type of MSS tabulation | |
| MSS_list_Length | Variable | The length of |
| MSS_ID_TYPE | ||
| 8 | The type of MSS_ID | |
| MSS_ID_Length | Variable | The length of MSS_ID |
| MSS_ID | Variable | The sign of MSS |
| Info_Support_HO_Optimization_TYPE | Variable | |
| Info_Support_HO_Optimization_Length | Variable | |
| Info_Support_HO_Optimization | -- | |
| Session Info Report_TYPE | Variable | |
| Session Info Report_Length | Variable | |
| Session Info Report | Variable | |
| }} |
Equally, the concrete form of other HO Pre-Notification Response message based on the TLV form, HODirective message, HO Directive Response message and the form of the HO Pre-Notification message in the table 5 are similar, so no longer describe in detail.
Certainly, the present invention can also adopt other TLV forms or extended formatting (i.e. form except that table 4 and table 5) as the form that switches message, as long as can carry corresponding information.
Based on the form of above-mentioned amended message, when ASN GW initiated handoff process, then the concrete implementation of method of the present invention specifically comprised as shown in Figure 5:
Step 51: the ASN GW in wireless communication system determines and need carry out hand-off process to one group of portable terminal, promptly when current serving BS switches to target BS, then the identification information of each portable terminal is carried on to switch and prepares to send to target BS in the notification message;
Such as, in the switching that network is initiated, owing to reasons such as offered loads, ASN GW need initiate to switch to a plurality of MSS; Then in HO Pre-Notification message, ASN GW will send the MSS tabulation to TBSs, comprise the information of a plurality of MSS in the tabulation, and each TBS only receives such message and can obtain a plurality of MSS information like this;
Step 52: target BS then carries out corresponding handover preparation process, and returns the response message that switches the preparation notice to ASN GW after receiving described switching preparation notification message;
Be specially: after TBS handles, return the HO Pre-Notification Response message of carrying a plurality of MSS information equally; Because handling, TBS needs elapsed time, HO Pre-NotificationResponse message may send and make that repeatedly all MSS have return value in the HO Pre-Notification message, is about to return to described ASN GW at the response message of all portable terminals by one or more response message;
Step 53:ASN GW receives after switching that target BS returns prepares the response message of notice, then sends switch indicating information to serving BS, notifies it to carry out hand-off process;
In switch indicating information HO Directive, also can carry the MSS tabulation, promptly can in a message, comprise a plurality of MSS equally;
Step 54: after serving BS carries out corresponding hand-off process, return switching indication response message HO Directive Response to ASN GW;
In switching the indication response message, can carry the MSS tabulation equally, and may return a plurality of HO Directive Response responses a HODirective message;
For example, carrying in the switch indicating information of sending and to carry out hand-off process to one group of portable terminal, then when returning switching indication response message, response message at one group of portable terminal can be sent to ASN GW by a response message, also can send to ASN GW by two or more s' message.
That is to say that in the present invention, for the switching message of carrying a plurality of MSS, its response message has the response message of one or more, one several MSS of response message portability, to reduce handover delay.
The front is illustrated as the corresponding improved processing procedure of switching the promoter ASN GW.To adopt corresponding improvement processing procedure of the present invention to describe again to when the promoter is switched in S-BS (former BS, i.e. serving BS) conduct below.At this moment, S-BS may require ASN GW some MSS to be carried out the pre-notice of TBSs.For this reason, can utilize HO Request message and HO Response message, so these two message also can change parameter into MSS_list, specifically as shown in table 6:
Table 6 is the form of HO Request message and HO Response message
| Primitive | Direction | Parameter |
| HO Request | Serving BS-＞ASN GW | Serving BS ID，MSS_list{N_MSS， MSS_ID，Candidate Target BS ID list，the MSS QoS Profile ID，MSS， Session Info Report， Info_Support_HO_Optimization} |
| HO Response | ASN GW-＞Serving BS | Serving BS ID，MSS_list{N_MSS， MSS_ID，Recommended Target BS ID list} |
In table 6, MSS_list holds the information of N_MSS MSS as a tabulation.
Need to prove content that the tabulation MSS_list of each MSS in above-mentioned table comprises be not limited to show in the content of record, in actual application, can increase as required or reduce.
Based on the message of expansion in the table 6, will initiate handoff process to S-BS below and be described, specifically as shown in Figure 6, comprising:
Step 61:S-BS send handoff request HO Request message to ASN GW;
That is to say, in the switching that S-BS initiates, when the R8 interface does not exist or S-BS load when too big, part switch operating request ASN GW can be assisted to finish, specifically send HO Pre-Notification (switching notice in advance) and carry out hand-off process by ASN GW, at this moment, can send the tabulation of the MSS of a needs switching to ASN GW by HORequest message, and need not send a plurality of HO Request message;
Step 62: after ASN GW receives described handoff request HO Request message, then send HO Pre-Notification message to target BS;
Step 63: target BS carries out returning HO Pre-NotificationResponse message after the corresponding hand-off process;
Step 64:ASN GW and target BS carry out communication and realize hand-off process, and after disposing, return corresponding handoff response HO Response message to S-BS;
Be after ASN GW disposes, send the HO Response that has the MSS tabulation;
To a HO Request message, can reply a handoff response HO Response message, also can reply a plurality of HO Response message.
As can be seen, in above-mentioned handoff process, although be that S-BS initiates to switch, but because S-BS and T-BS do not have direct R8 interface or other reasons, too heavily wait as the S-BS load, can be by send HO Request message to ASN GW, request ASN GW sends HO Pre-Notification message to T-BS, carry out corresponding hand-off process operation, after ASN GW receives HO Pre-Notification Response, then can send corresponding information to S-BS by HO Response message.For some MSS, concrete processing procedure is as follows:
(1) can do the simplifying of Target BS list of this MSS correspondence at ASN GW, promptly choose in the T-BS from the Candidate Target BS ID list that S-BS sends, the Recommended Target BS ID list that the T-BS that selects forms sends to S-BS by HO Response message;
Perhaps, adopt the processing mode of following (2);
(2) ASN GW also can be left intact, in HO Response message, carry Serving BS ID, MSS_list{N_MSS, MSS_ID, Candidate Target BS IDlist} parameter is issued SBS, SBS chooses TBS among the Candidate Target BS ID list then, selects Recommended Target BS ID list, gives to MSS then.
Certainly, in Fig. 6, if S-BS has function corresponding, then can communicate the realization hand-off process by between himself and T-BS, for example, have the R8 interface between S-BS and the T-BS, and the S-BS loading condition is when allowing to handle accordingly, then can carry out hand-off process to the portable terminal that needs carry out hand-off process, referring to step 65 among Fig. 6 and step 66 by S-BS self;
Step 65:S-BS sends HO Pre-Notification message to T-BS, carries out corresponding hand-off process operation by T-BS;
Step 66: after T-BS finishes dealing with, then return HO Pre-NotificationResponse message to S-BS.
The loaded information ginseng is shown in Table 3 in the message in step 65 and the step 66, promptly when needs switch a plurality of portable terminals simultaneously, the identifying information of a plurality of portable terminals all is carried on corresponding one switches in the message and send to T-BS, and receive the response message that T-BS returns.
In the method for the present invention, also comprise: after the serving BS of portable terminal is determined handover success, switch expression HO lndication message for each portable terminal unification sends to ASN GW;
Described ASN GW represents that according to described switching the information unification sends corresponding the switching to target BS and confirms HO Confirmation message.
Described switching represents that the information of message bearing comprises: the sign Target BS ID of the quantity N MSS of portable terminal, the sign MSS_ID of each portable terminal and target BS;
Described switch acknowledgment message loaded information comprises: the quantity N_MSS of portable terminal, the sign MSS_ID of each portable terminal and session information report Session Info Report.
In sum, the present invention can be taken in need carry out hand-off process to one group of portable terminal the time at S-BS or ASN GW by above-mentioned processing, and when the target BS of hand-off process is same base station, then the message bearing of each terminal can be switched in one and carry out the handover operation processing in the message, thereby improve the efficient of hand-off process, shorten the needed time of hand-off process.
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 (19)
1, realize the method that terminal is switched in a kind of wireless communication system, it is characterized in that, comprising:
A, in the time need carrying out hand-off process to one group of portable terminal in the wireless communication system, then the identifying information of each portable terminal in described one group of portable terminal is carried on and switches in the message, and in wireless communication system, transmit described switching message;
B, in wireless communication system, carry out the hand-off process of each portable terminal according to described switching message.
2, realize the method that terminal is switched in the wireless communication system according to claim 1, it is characterized in that described wireless communication system comprises: micro-wave access to global intercommunication WiMAX system.
3, realize the method that terminal is switched in the wireless communication system according to claim 1, it is characterized in that described steps A comprises:
When determining that according to the handoff request of network side or user side initiation needs carry out hand-off process at least two portable terminals by the network side in the WiMAX system, and when the target BS of described hand-off process is same base station, then the identifying information unification of each portable terminal is carried on same and switches in the message and send to target BS.
4, the method that terminal is switched it is characterized in that described steps A comprises according to realizing in claim 1, the 2 or 3 described wireless communication systems:
A1, when access service network gateway ASN GW and/or serving BS are determined to carry out hand-off process to one group of portable terminal, then the identifying information of each portable terminal is carried on one and switches and prepare to send to corresponding target BS in the notification message.
5, realize the method that terminal is switched in the wireless communication system according to claim 4, it is characterized in that loaded information comprises in the described switching preparation notification message:
The quantity of portable terminal, the sign of each portable terminal, support handover optimization information, session information report.
6, realize the method that terminal is switched in the wireless communication system according to claim 4, it is characterized in that described steps A 1 comprises:
Target BS returns the response message that notice is prepared at least one switching to described ASN GW or serving BS.
7, realize the method that terminal is switched in the wireless communication system according to claim 6, it is characterized in that loaded information comprises in the response message that described switching prepares to notify:
The service quality sign of the quantity of handover success/failure flags, portable terminal, the sign of portable terminal, portable terminal, and/or support handover optimization information.
8, realize the method that terminal is switched in the wireless communication system according to claim 4, it is characterized in that described steps A also comprises:
A2, for the handoff procedure of initiating by described ASN GW, described ASN GW need send the switch indicating information of at least one portable terminal identifying information of carrying to serving BS.
9, realize the method that terminal is switched in the wireless communication system according to claim 8, it is characterized in that loaded information comprises in the described switch indicating information:
The quantity of portable terminal, the sign of recommending target BS, support handover optimization information, portable terminal service quality sign and/or session information report.
10, realize the method that terminal is switched in the wireless communication system according to claim 8, it is characterized in that described steps A 2 also comprises:
Described serving BS returns at least one switching that comprises each portable terminal identifying information to described ASN GW and indicates response message.
11, realize the method that terminal is switched in the wireless communication system according to claim 10, it is characterized in that loaded information comprises in the described switching indication response message:
The quantity of handover success/failure flags, portable terminal and/or the sign of portable terminal.
12, realize the method that terminal is switched in the wireless communication system according to claim 4, it is characterized in that described steps A comprises:
A3, when serving BS determines to carry out hand-off process to one group of portable terminal, serving BS judges whether self can handle, if can, then send described switching to target BS and prepare notification message by serving BS, otherwise, can send handoff request message to ASN GW, and send described switching preparation notification message to target BS by ASNGW.
13, realize the method that terminal is switched in the wireless communication system according to claim 12, it is characterized in that loaded information comprises in the described handoff request message:
The target BS of the quantity of portable terminal, each mobile terminal identification, candidate, portable terminal service quality sign, session information report and/or support handover optimization information.
14, realize the method that terminal is switched in the wireless communication system according to claim 12, it is characterized in that described steps A 3 also comprises:
ASN GW returns the response message of handoff request to serving BS.
15, realize the method that terminal is switched in the wireless communication system according to claim 14, it is characterized in that loaded information comprises in the response message of described handoff request:
The identification list of the target BS of the quantity of portable terminal, the sign of each portable terminal, recommendation or the identification list of candidate target BS.
16, realize the method that terminal is switched in the wireless communication system according to claim 15, it is characterized in that described steps A 3 also comprises:
When having carried the identification list of candidate target BS in the response message of the handoff request that serving BS is received, then need from the identification list of described candidate target BS, to select the identification list of the target BS of corresponding recommendation.
17, the method that terminal is switched it is characterized in that this method also comprises according to realizing in claim 1, the 2 or 3 described wireless communication systems:
After the serving BS of portable terminal is determined handover success,, each portable terminal unification switches expression message for sending to ASN GW;
Described ASN GW represents that according to described switching the message unification sends corresponding switch acknowledgment message to target BS.
18, realize the method that terminal is switched in the wireless communication system according to claim 17, it is characterized in that:
Described switching represents that the information of message bearing comprises: the sign of the quantity of portable terminal, the sign of each portable terminal and target BS;
Described switch acknowledgment message loaded information comprises: the quantity of portable terminal, the sign of each portable terminal and session information report.
19, the method that terminal is switched it is characterized in that the form of described switching message can adopt type lengths values TLV form according to realizing in claim 1, the 2 or 3 described wireless communication systems.
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| CN101415211B (en) * | 2007-10-16 | 2012-10-03 | 华为技术有限公司 | Method, system and apparatus for processing switch |
| CN102084691B (en) * | 2008-08-29 | 2014-11-05 | 上海贝尔股份有限公司 | Method and apparatus for group handover in wireless network |
| CN101674526B (en) * | 2008-09-09 | 2015-04-01 | 中兴通讯股份有限公司 | MBS mobile management method and terminal MBS-switching method |
| CN101640877B (en) * | 2009-08-20 | 2012-05-09 | 中兴通讯股份有限公司 | Switching method and device for WiMAX system |
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