CN100596228C - Method for terminal switching between heterogeneous network - Google Patents

Method for terminal switching between heterogeneous network Download PDF

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Publication number
CN100596228C
CN100596228C CN200610000275A CN200610000275A CN100596228C CN 100596228 C CN100596228 C CN 100596228C CN 200610000275 A CN200610000275 A CN 200610000275A CN 200610000275 A CN200610000275 A CN 200610000275A CN 100596228 C CN100596228 C CN 100596228C
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access
target access
network
target
service
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CN101001439A (en
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庄宏成
余劲
姜炳强
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Abstract

This invention relates to a switch method among isomeric networks by terminals including: a service access point receives an initialized request of switch, it requires resource distribution information to an adjacent target access point and selects multiple available target access points and their corresponding access networks to send them to the terminal for switching, in which, a terminal can select multiple target access points and their corresponding access networks, and when the terminal is ready for switch, it can set up links with the target access points and the corresponding networksso as to increase probability of successful switch.

Description

The method that terminal is switched between heterogeneous network
Technical field
The present invention relates to the communications field, relate in particular to the switching of terminal between heterogeneous network.
Background technology
Along with the high speed development of the communication technology, the situation of multiple heterogeneous network coexistence has appearred, and terminal is carried out seamless switching between existing heterogeneous network problem also becomes increasingly conspicuous out thereupon.
The selection of the moving of the variation of channel circumstance, user, different business etc. all may cause internetwork switching.In order to realize the seamless switching of terminal between heterogeneous network, the notion that media-independent switches has been proposed, its objective is the seamless switching of realizing between heterogeneous network, reduce switching delay and loss of data, guarantee the continuity of conversation procedure, strengthen user's experience.
Media-independent switches mainly realizes that by the media-independent service described media-independent service comprises:
1, media-independent Event Service comprises incident and trigger that local and remote interface produces.
2, media-independent command service is used for user's control of giving an order and switches relevant link behavior.
3, media-independent service provides information model and information bank, so that formulate handover decisions effectively.
The media-independent switching shields by physical layer and MAC layer to multiple Access Network, has realized the switching of terminal between multiple heterogeneous network (IEEE 802.11, IEEE 802.15,3GPP, 3GPP2 or IEEE802.16 etc.).Switching may be triggered by terminal or network side, and switching flow is as follows:
Service Access Point (network side) sends the indication that is about to close link by remote events to terminal, terminal is sent the switching initialization request command to Service Access Point after receiving this indication, Service Access Point sends the handover preparation request order to target access after receiving this request, target access is received the Resources list of more present available resources situation and application after the handover preparation request, send the handover preparation request response to Service Access Point simultaneously, Service Access Point sends switching initialization request response to terminal after receiving this response, after terminal is received response, if target access has satisfactory resource, terminal will be sent and switch the request of execution.
Description of the Prior Art related to the present invention terminal prepare to switch to the process of target access from Service Access Point, in order to simplify description, suppose that terminal and network side are all by the Up Layer (upper strata) of Service Access Point, MIH (Media Independent Handover, media-independent switches) functional entity and MAC (Media Access Control, media interviews control) functional entity is formed, terminal switches to another access point from an access point, for convenience of description, the access point at terminal place is called Service Access Point (Serving AP), the access point that terminal is prepared to switch to is called target access (Target AP), its signalling interactive process comprises as shown in Figure 1:
Step 1, terminal are sent the switching initialization request message to Service Access Point, carry target access ID, the switch mode of network ID, the command transfer layer (L2/L3) of mobility protocol, command type (local/long-range), the Service Access Point on Service Access Point upper strata, the network type of a suggestion, a suggestion, the link behavioural information of current Access Network in the described message.
The information of carrying in the described request message, as shown in table 1,
Name Type Valid range Discreption
CommandSource UPPER_LAYER_TYPE N/A The origination point from where the command is initiated.This is usually some form of upper layer such as a policy engine，or a L3 Mobility protocol，transport， application etc.
CommandDestination MIH_LOCAL， MIH_REMOTE This specifies the command destination which can be either local or remote MIH Function.
CurrentLinkIdentifier NetworkIdentifier. Can be one of different 802and This identifies the current access network over which the command needs to be sent.This
Cellular networks. is valid only for remote commands which need to be sent to remote MIHF.The command is then sent either at L2or at L3.
TransportLayer TRANSPORT_L2， TRANSPORT_L3 This identifies the transport layer L2or L3over which the command needs to be sent to remote MIHF entity.This is valid only for remote commands.
SuggestedNewLinkIdentifier NetworkIdentifier.Can be one of different 802 and Cellular networks This is the identifier of new networks to which handover needs to be initiated.
SuggestedNewPoAIdentifier MAC_ADDRESS (Optional) This is the preferred Point of Attachment(AP/BS)on new networks，the front is most preferred.
HandoverMode Make-before Break Break-before-Make The handover mode may influence the manner in which links are prepared for handover
CurrentLinkAction LINK_DISCONNECT LINK_LOW_POWER LINK_POWER_DOWN LINK_NO_ACTION Specifies suggested action on old link once handover procedures have been executed.
QueryResourceList BOOL Flag to query the available list of resources on the new link
Table 1
Wherein, SuggestedNewLinkldentifier and SuggestedNewPoAldentifier represent to switch the initiator respectively, i.e. terminal target link of advising and the sign of PoA.
After step 2, Service Access Point are received this request, from the neighbor information table, obtain adjacent a plurality of objective networks, and the information that can insert the target access of each objective network, send handover preparation request to described target access then, query aim access point available resources situation, the Resources list information of wherein carrying network ID, the command transfer layer (L2/L3) of Service Access Point upper strata mobility protocol, command type (local/long-range), Service Access Point and asking to distribute.
After step 3, target access are received handover preparation request, by inquiring about the tabulation of present resource operating position and requested resource, send this request responding to Service Access Point, the network ID, command transfer layer (L2/L3), resource that Service Access Point is applied for that wherein carries target access upper strata mobility protocol, command type (local/long-range), target access in target access state (whether occupied) and target access in have list of available resources information now.
After step 4, Service Access Point are received response, therefrom select a preferred network type, a preferred target access ID, and sending the switching initialization request response to terminal, it carries the reason of network ID, command transfer layer (L2/L3), initialization handover success or the failure sign of Service Access Point upper strata mobility protocol, command type (local/long-range), Service Access Point, preferred network type, preferred target access ID, the failure of initialization handoff request.
Information in the described initialization request response message, as shown in table 2:
Name Type Valid range Discreption
CommandSource UPPER_LAYER_TYPE N/A The origination point from where the command is initiated. This is usually some form of upper layer such as a policy engine，or a L3Mobility protocol，transport， application etc.
CommandDestination MIH_LOCAL， MIH_REMOTE This specifies the command destination which can be either local or remote MIH Function.
CurrentLinkIdentifier NetworkIdentifier. Can be one of different 802and Cellular networks. This identifies the current access network over which the command needs to be sent.This is valid only for remote commands which need to be sent to remote MIHF.The command is then sent either at L2or at L3.
TransportLayer TRANSPORT_L2， TRANSPORT_L3 This identifies the transport layer L2or L3over which the command needs to be sent to remote MIHF entity.This is valid only for remote commands.
HandoverAck BOOL 1：Initiate Handover. 0：Abort Handover If the handover has to be aborted then a reason code is provided
PreferredLinkIdentifier NetworkIdentfier.Can be one of different 802 and Cellular networks This is the preferred Point of Attachment(AP/BS)on new networks.the front is most preferred.
PreferedPoAIdentifier MAC_ADDRESS This is the identifier of new network to which handover needs to be initiated.This may be di fferent than the networks that was suggested in the handoverrequest. The front is most preferred.
AbortReason LINK_DISCONNECT LINK_LOW_POWER LINK_POWER_DOW N LINK_NO_ACTION This is the preferred Point of Attachment(AP/BS) on new network.This may be different than what was suggested in handover request.
Available Resource List List of available rsources on new link
Table 2
Wherein, the PreferredLinkldentifier of band underscore and PreferedPoAldentifier represent to switch first-selected target link and the sign of PoA respectively.
By prior art as can be seen, there is following defective in it:
Preferred objective network and target access that network terminal sends to terminal only are one, when terminal not when the objective network that sends to of network enabled end and target access, and the failure that may cause terminal to be switched.
Summary of the invention
The purpose of this invention is to provide the method that a kind of terminal is switched between heterogeneous network, by the present invention, terminal can be selected the access network of a plurality of target access and described target access correspondence, when terminal is prepared to switch, can guarantee that terminal finds the access network of corresponding target access and described target access correspondence, thereby the probability of terminal handover success can be provided.
The objective of the invention is to be achieved through the following technical solutions:
The invention provides the method that a kind of terminal is switched between heterogeneous network, it comprises:
A01, terminal are initiated the switching initialization request, are carrying the access network of a plurality of types of terminal proposes in the described request, and the identification information that can insert the target access of described access network; Or the switching initialization request is initiated on the upper strata of A02, Service Access Point, is carrying the access network of a plurality of types of Service Access Point upper strata suggestion in the described request, and the identification information that can insert the target access of described access network;
After A, Service Access Point receive the switching initialization request, send handover preparation request, be used for requests resource allocation information to adjacent each target access;
B, get access to the resource allocation information of each target access when Service Access Point after, select a plurality of available target access, and the access network of described target access correspondence, and send to terminal, the a plurality of available target access that terminal sends from Service Access Point and the access network of described target access correspondence, select the access network of a target access and this target access correspondence to switch.
Wherein, described steps A 01 specifically comprises:
Terminal is initiated the switching initialization request, information in the network type tabulation by the suggestion of carrying in the described request and the target access tabulation of suggestion, with the access network of a plurality of types of terminal proposes, and the identification information that can insert the target access of described access network sends to Service Access Point.
Wherein, described steps A 02 specifically comprises:
The MIH entity of the described Service Access Point of last course of Service Access Point is initiated the switching initialization request, information in the network type tabulation by the suggestion of carrying in the described request and the target access tabulation of suggestion, with the access network of a plurality of types of upper strata suggestion, and the identification information that can insert the target access of described access network sends to Service Access Point.
Wherein, described steps A specifically comprises:
A1, after Service Access Point receives the switching initialization request, inquiry and obtain a plurality of adjacent access networks, and each target access that can insert described access network from neighbor list;
A2, the mode of broadcasting or clean culture of passing through are to described each target access requests resource allocation information.
Wherein, if terminal is initiated the switching initialization request, described step B specifically comprises:
B1, learn the resource allocation information of each target access when Service Access Point after, select available a plurality of target access, and the access network of described a plurality of target access correspondences;
B2, the identification information of selected a plurality of target access and the intervention network of described a plurality of target access correspondences are sent to terminal by the switching initialization response message;
After B3, terminal receive described switching initialization response message, a plurality of access networks and a plurality of identification information that can insert the target access of described access network in conjunction with described terminal proposes, from described information, select the access network of a target access and described target access correspondence, and initiate handoff request to the access network of this target access correspondence by described target access.
Wherein, if the switching initialization request is initiated on the Service Access Point upper strata, described step B specifically comprises:
B4, learn the resource allocation information of each target access when Service Access Point after, select available a plurality of target access, and the access network of described a plurality of target access correspondences;
B5, the access network of a plurality of types of the access network of the identification information of selected a plurality of target access and described a plurality of target access correspondences and the suggestion of Service Access Point upper strata and the identification information that can insert the target access of described access network are sent to terminal by the switching initialization request message;
B6, after terminal receives described switching initialization request message, access network and a plurality of identification information that can insert the target access of described access network in conjunction with a plurality of types of advising, determine the access network of an optimal target access point and this target access correspondence in a plurality of target access of from the switching initialization request, carrying and the access network information, and send the switching initialization request response to Service Access Point, and the information of the access network of optimal target access point and this target access correspondence is sent to Service Access Point, and initiate to switch the request of execution to the access network of this target access correspondence by the optimal target access point by the preferred network type tabulation of carrying in the described switching initialization request response and preferred target access ID tabulation.
Wherein, described step B specifically comprises:
B7, learn the resource allocation information of each target access when Service Access Point after, access network and a plurality of identification information that can insert the target access of described access network in conjunction with a plurality of suggestions of carrying in the described switching initialization request, select a plurality of available target access, and the described target access access network that can insert;
If the B8 terminal is initiated the switching initialization request, Service Access Point sends to terminal by the switching initialization response message with the identification information of a plurality of target access of described selection and the access network of described a plurality of target access correspondences; If the switching initialization request is initiated on the Service Access Point upper strata, Service Access Point sends to terminal by the switching initialization request message with the identification information of a plurality of target access of described selection and the access network of described a plurality of target access correspondences;
B9, terminal therefrom select an optimal target access point to initiate handoff request to the objective network of correspondence according to the information that receives.
Wherein, before described step B1 or step B4 or step B7, also comprise:
After B11, each target access receive the handover preparation request of described Service Access Point transmission, according to the Resources list inquiry of described request and the operating position of the own current resource of acquisition, and the response message by described handover preparation request is the relevant information of described acquisition, and the access network information of described each target access correspondence sends to described Service Access Point;
B12, described Service Access Point are known the resource operating position of described each target access from the response message of described handover preparation request, and the access network information of described each target access correspondence.
Wherein, described step B1 or step B4 or step B7 also comprise:
Service quality QoS or service price according to each target access bearer service sort selected target access.
Wherein, described step B2 specifically comprises:
Preferred network type tabulation and the preferred target access ID tabulation of described Service Access Point by carrying in the switching initialization response message sends to terminal with the identification information of a plurality of target access of described selection and the access network of described a plurality of target access correspondences.
As seen from the above technical solution provided by the invention, among the present invention, after Service Access Point receives the switching initialization request, to each adjacent target access requests resource allocation information; Behind the resource allocation information that gets access to each target access, select a plurality of available target access, and the access network of described target access correspondence, and send to terminal in order to switch.By the present invention, terminal can be selected the access network of a plurality of target access and described target access correspondence, when terminal is prepared to switch, can guarantee that successfully corresponding with corresponding target access and the described target access access network of terminal sets up link, thereby can improve the probability of terminal handover success.
Description of drawings
Fig. 1 is the flow chart of prior art;
Fig. 2 is the flow chart of first embodiment provided by the invention;
Fig. 3 is the flow chart of the 3rd embodiment provided by the invention.
Embodiment
Because in the whole handoff procedure of terminal, may exist a plurality of objective networks and a plurality of target access to satisfy user's switching requirement, therefore for the user can be selected according to current operating position, the invention provides the method that a kind of terminal is switched between heterogeneous network, its core is: after Service Access Point receives the switching initialization request, to each adjacent target access requests resource allocation information; Behind the resource allocation information that gets access to each target access, select a plurality of available target access, and the access network of described target access correspondence, and send to terminal in order to switch.
First embodiment provided by the invention as shown in Figure 2, comprising:
Step 1, terminal detects Access Network on every side, and each network type that selection can insert according to business demand, and each target access that can insert described type network, send the switching initialization request message to Service Access Point then, and the target access ID tabulation of network type tabulation by the suggestion of carrying in the described message and suggestion is selected network type, and the identification information that inserts the target access of described type network sends to Service Access Point.
Also carry network ID, command transfer layer (L2/L3), the switch mode of Service Access Point upper strata mobility protocol, command type (local/long-range), Service Access Point, the link behavioural information of current Access Network in the described message.As shown in table 3:
Name Type Valid range Discreption
CommandSource UPPER_LAYER_TYPE N/A The origination point from where the Command is initiated.This is usually
some form of upper layer such as a policy engine， or a L3Mobility protocol， transport，application etc.
CommandDestination MIH_LOCAL， MIH_REMOTE This specifies the command destinat ion which can be either local or remote MIH Function.
CurrentLinkIdentifier NetworkIdentifier. Can be one of different 802and Cellular networks. This identifies the current access network over which the command needs to be sent. This is valid only for remote commands which need to be sent to remote MIHF. The command is then sent either at L2or at L3.
TransportLayer TRANSPORT_L2， TRANSPORT_L3 This identifies the transport layer L2or L3 over which the command needs to be sent to remote MIHF entity. This is valid only for remote commands.
SuggestedNewLinkIdentifierList NetworkIdentifier.Can be one of different 802 and Cellular networks This is the identifier List of new networks to which handover needs to be initiated.
SuggestedNewPoAIdentifierList MAC ADDRESS (Optional) This is the preferred Point of Attachment List (AP/BS)on new networks，the front is most preferred.
HandoverMode Make-before Break Break-before-Make The handover mode may influence the manner in which links are prepared for handover
CurrentLinkAction LINK_DISCONNECT LINK_LOW_POWER LINK_POWER_DOWN LINK_NO_ACTION Specifies suggested action on old link once handover procedures have been executed.
QueryResourceList BOOL Flag to query the available list of resources onthe new link
Table 3
Contrast table 1 and table 3 are as can be seen, the font of band underscore is to revise on the basis of table 2 in the table 3, and SuggestedNewLinkldentifierList and SuggestedNewPoAldentifierList represent to switch target list of link and the PoA identification list that the initiator advises respectively.
After step 2, Service Access Point are received this request, send handover preparation request, inquire about the available resources situation of the use of each target access to a plurality of objective networks and target access that Service Access Point is adjacent.The Resources list information that the request of carrying in the described message distributes.
In step 2, after Service Access Point is received the switching initialization request message of terminal transmission, from the neighbor information table, obtain adjacent a plurality of objective networks, and the identification information that can insert the target access of each objective network, adopt the mode of broadcasting or clean culture subsequently, to described target access, send handover preparation request, inquire about each target access available resources situation, wherein carry Service Access Point upper strata mobility protocol, command type (local/long-range), the network ID of Service Access Point, the Resources list information that command transfer layer (L2/L3) and request distribute.
Step 3, after each target access is received handover preparation request, according to the Resources list inquiry of described request and the operating position of the own current resource of acquisition, send this request responding to Service Access Point, the network ID, command transfer layer (L2/L3), resource that Service Access Point is applied for that wherein carries target access upper strata mobility protocol, command type (local/long-range), target access in target access state (whether occupied) and target access in have list of available resources information now.
Step 4, after Service Access Point is received response, obtain the available resource information of each target access feedback, therefrom select a plurality of available target access and access network then, then will be according to the service quality (QoS) or the service price of business, each target access is sorted, and be saved in network type tabulation and the target access tabulation.Send the switching initialization response message to terminal then, and the identification information of described each available target access and access network is sent to terminal by the preferred network type tabulation of carrying in the described message and preferred target access ID tabulation.
Also carry network ID, command transfer layer (L2/L3), initialization handover success or the failure sign of Service Access Point upper strata mobility protocol, command type (local/long-range), Service Access Point and the information such as reason of initialization handoff request failure in the described message.As shown in table 4:
Name Type Valid range Discreption
CommandSource UPPER_LAYER_TYPE N/A The origination point from where the command is initiated.This is usually some form of upper layer such as a policy engine，or a L3 Mobility protocol， transport，application etc.
CommandDestination MIH_LOCAL， MIH_REMOTE This specifies the command destination which can be either local or remote MIH Function.
CurrentLinkIdentifier NetworkIdentifier.Can be one of different 802and Cellular networks. This identifies the current access network over which the command needs to be sent.This is valid only for remote commands which need to be sent to remote MIHF.The command is then sent either at L2 or at L3.
TransportLayer TRANSPORT_L2， TRANSPORT_L3 This identifies the transport layer L2or L3over which the command needs to be sent to remote MIHF entity.This is valid only for remote commands.
HandoverAck BOOL 1：Initiate Handover， at least one network and POA is ok. 0：Abort Handover If the handover has to be aborted then a reason code is provided
PreferredLinkIdentifierList NetworkIdentifier.Can be one of different 802 and Cellular networks This is the preferred Point of Attachment List (AP/BS)on new networks，
the front is most preferred.
PreferedPoAIdentifierList MAC_ADDRESS This is the identifier of new network List to which handover needs to be initiated.This may be different than the networks that was suggested in the handover request. The front is most preferred.
AbortReason LINK_DISCONNECT LINK_LOW_POWER LINK_POWER_DOW N LINK_NO_ACTION This is the preferred Point of Attachment(AP/BS) on new network.This may be different than what was suggested in handover request.
Available Resource List List of available rsources on new link
Table 4
Contrast table 2 and table 4 are as can be seen, the font of band underscore is to revise on the basis of table 2 in the table 4, Preferred LinkldentifierList and PreferedPo AldentifierList information have been added, the target link of switching requirement and the identification list of PoA are satisfied in expression respectively, the priority that comes the front is the highest, successively decreases successively backward.
After terminal receives described switching initialization request response, the a plurality of available target access that comprises in the preferred network type tabulation of carrying in the described message, the preferred target access ID tabulation and corresponding access network and a plurality of access network types and a plurality of identification information that can insert the target access of described access network of terminal proposes are compared, from the information of unanimity, select a target access and objective network then, send switching execution request by described target access to the objective network of correspondence then.
The objective network of supporting to low selective sequential oneself Zi height according to priority level when terminal is switched, when the highest network of priority is not suitable for oneself, select the network type and the target access of priority level suboptimum, as the end cell off-capacity to support to require wave point than macro-energy.
Second embodiment provided by the invention, the difference part of itself and first embodiment is:
In step 4, after Service Access Point is received the response message of each target access feedback, obtain the available resource information of each target access feedback, the network type and the target access of advising with terminal compares then, therefrom select consistent information, service quality (QoS) or service price according to business sorts to each selected target access then, and is saved in preferred network type tabulation and the preferred target access tabulation.Send to terminal by the switching initialization request response then.
Receive the message of described network terminal transmission when terminal after, therefrom select a target access to be accessed and network type, send to objective network by described target access then and switch the request of execution.
Associated description among all the other and first embodiment is identical, is not described in detail.
The 3rd embodiment provided by the invention is the processing procedure when the switching initialization request is initiated on the upper strata of Service Access Point, and it comprises as shown in Figure 3:
Step 1, the local MIH entity of the last course of Service Access Point sends the switching initialization request, and information in the target access ID tabulation of the network type tabulation of the suggestion of the Service Access Point upper strata by carrying in the described request and suggestion, the network type of Service Access Point upper strata suggestion and the identification information of target access are sent to local MIH entity.
Also carry Network Access Point ID tabulation, the switch mode of network type tabulation, the suggestion of network ID, command transfer layer (L2/L3), the suggestion of mobility protocol, command type (local/long-range), Service Access Point, the information such as link behavior of current Access Network in the described request.
The target access ID tabulation of tabulation of described network type and suggestion identical with first embodiment in table 3 in associated description, be not described in detail here.
Step 2, after Service Access Point is received this request, from the neighbor information table, inquire about and obtain a plurality of adjacent objective networks and the information of target access, adopt the mode of broadcasting or clean culture then, send handover preparation request to a plurality of objective networks and target access that Service Access Point is adjacent, inquire about each target access available resources situation, wherein carry the Resources list information of network ID, command transfer layer (L2/L3) and the request distribution of Service Access Point upper strata mobility protocol, command type (local/long-range), Service Access Point.
Step 3, after each target access is received handover preparation request, operating position according to requested resource list query and the own current resource of acquisition, send this request responding to Service Access Point then, the network ID, command transfer layer (L2/L3), resource that Service Access Point is applied for that wherein carries target access upper strata mobility protocol, command type (local/long-range), target access in target access state (whether occupied) and target access in have list of available resources information now.
Step 4, Service Access Point are selected available target access of a plurality of terminals and access network according to the resource operating position of each target access; Service quality (QoS) or service price according to business sorts to described each target access of selecting then, and send the switching initialization request to terminal, and the preferred network type tabulation by carrying in the request, the information in the preferred target access ID tabulation be a plurality of available target access, and the information of the described target access access network that can insert sends to terminal.
Also carry network ID, command transfer layer (L2/L3), the switch mode of Service Access Point upper strata mobility protocol, command type (local/long-range), Service Access Point, the link behavior of current Access Network in the described request.
Described preferred network type tabulation, preferred target access ID list information is identical with first embodiment in table 4 in associated description, no longer be described in detail here.
Step 5, after terminal is received handoff request, a plurality of access network types and a plurality of identification information that can insert the target access of described access network in conjunction with suggestion, determine an optimal target access point and an access network that is fit to oneself in a plurality of target access of from request, carrying and the access network information, and send switching initialization request response to Service Access Point, and by the preferred network type tabulation of carrying in the request, preferred target access ID tabulation will own selection target access and the information of access network send to Service Access Point.Initiate to switch the request of execution by selected target access to the access network of correspondence simultaneously.
In the step 5, described preferred network type tabulation, preferred target access ID list information is identical with first embodiment in table 4 in associated description, no longer be described in detail here.
The 4th embodiment provided by the invention, the difference of itself and the 3rd embodiment is step 4 and step 5:
In step 4, after Service Access Point is received the response message of each target access feedback, obtain the available resource information of each target access feedback, the network type and the target access of being advised with the Service Access Point upper strata compares then, therefrom select consistent information, service quality (QoS) or service price according to business sorts to each selected target access then, and during the network type that is saved in suggestion is tabulated and the target access of suggestion is tabulated, send to terminal by the switching initialization request message then.
In step 5, terminal is therefrom selected a target access to be accessed and network type after receiving the message of described network terminal transmission, sends to objective network by described target access then and switches the request of execution.
Associated description among all the other and the 3rd embodiment is identical, is not described in detail.
The specific embodiments that is provided by the invention described above as can be seen, the present invention on the basis of existing technology, make the terminal of supporting the MIH function when switching, can carry out the selection of objective network, thereby, increase the probability of handover success for the continuity and the user experience of business provides better assurance.And implement to need not to increase hardware cost when of the present invention, its autgmentability is better.
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 (10)

1, the method switched between heterogeneous network of a kind of terminal is characterized in that, comprising:
A01, terminal are initiated the switching initialization request, are carrying the access network of a plurality of types of terminal proposes in the described request, and the identification information that can insert the target access of described access network; Or the switching initialization request is initiated on the upper strata of A02, Service Access Point, is carrying the access network of a plurality of types of Service Access Point upper strata suggestion in the described request, and the identification information that can insert the target access of described access network;
After A, Service Access Point receive the switching initialization request, send handover preparation request, be used for requests resource allocation information to adjacent each target access;
B, get access to the resource allocation information of each target access when Service Access Point after, select a plurality of available target access, and the access network of described target access correspondence, and send to terminal, the a plurality of available target access that terminal sends from Service Access Point and the access network of described target access correspondence, select the access network of a target access and this target access correspondence to switch.
2, method according to claim 1 is characterized in that, described steps A 01 specifically comprises:
Terminal is initiated the switching initialization request, information in the network type tabulation by the suggestion of carrying in the described request and the target access tabulation of suggestion, with the access network of a plurality of types of terminal proposes, and the identification information that can insert the target access of described access network sends to Service Access Point.
3, method according to claim 1 is characterized in that, described steps A 02 specifically comprises:
The MIH entity of the described Service Access Point of last course of Service Access Point is initiated the switching initialization request, information in the network type tabulation by the suggestion of carrying in the described request and the target access tabulation of suggestion, with the access network of a plurality of types of upper strata suggestion, and the identification information that can insert the target access of described access network sends to Service Access Point.
4, according to the described any described method of claim 1 to 3, it is characterized in that described steps A specifically comprises:
A1, after Service Access Point receives the switching initialization request, inquiry and obtain a plurality of adjacent access networks, and each target access that can insert described access network from neighbor list;
A2, the mode of broadcasting or clean culture of passing through are to described each target access requests resource allocation information.
5, method according to claim 1 is characterized in that, if terminal is initiated the switching initialization request, described step B specifically comprises:
B1, learn the resource allocation information of each target access when Service Access Point after, select available a plurality of target access, and the access network of described a plurality of target access correspondences;
B2, the identification information of selected a plurality of target access and the access network of described a plurality of target access correspondences are sent to terminal by the switching initialization response message;
After B3, terminal receive described switching initialization response message, a plurality of access networks and a plurality of identification information that can insert the target access of described access network in conjunction with described terminal proposes, from described information, select the access network of a target access and described target access correspondence, and initiate handoff request to the access network of this target access correspondence by described target access.
6, method according to claim 1 is characterized in that, if the switching initialization request is initiated on the Service Access Point upper strata, described step B specifically comprises:
B4, learn the resource allocation information of each target access when Service Access Point after, select available a plurality of target access, and the access network of described a plurality of target access correspondences;
B5, the access network of a plurality of types of the access network of the identification information of selected a plurality of target access and described a plurality of target access correspondences and the suggestion of Service Access Point upper strata and the identification information that can insert the target access of described access network are sent to terminal by the switching initialization request message;
B6, after terminal receives described switching initialization request message, access network and a plurality of identification information that can insert the target access of described access network in conjunction with a plurality of types of advising, determine the access network of an optimal target access point and this target access correspondence in a plurality of target access of from the switching initialization request, carrying and the access network information, and send the switching initialization request response to Service Access Point, and the information of the access network of optimal target access point and this target access correspondence is sent to Service Access Point, and initiate to switch the request of execution to the access network of this target access correspondence by the optimal target access point by the preferred network type tabulation of carrying in the described switching initialization request response and preferred target access ID tabulation.
7, method according to claim 1 is characterized in that, described step B specifically comprises:
B7, learn the resource allocation information of each target access when Service Access Point after, access network and a plurality of identification information that can insert the target access of described access network in conjunction with a plurality of suggestions of carrying in the described switching initialization request, select a plurality of available target access, and the described target access access network that can insert;
If the B8 terminal is initiated the switching initialization request, Service Access Point sends to terminal by the switching initialization response message with the identification information of a plurality of target access of described selection and the access network of described a plurality of target access correspondences; If the switching initialization request is initiated on the Service Access Point upper strata, Service Access Point sends to terminal by the switching initialization request message with the identification information of a plurality of target access of described selection and the access network of described a plurality of target access correspondences;
B9, terminal therefrom select an optimal target access point to initiate handoff request to the access network of this target access correspondence according to the information that receives.
8, according to any described method of claim 5～7, it is characterized in that, before described step B1 or step B4 or step B7, also comprise:
B11, each target access receive the handover preparation request that described Service Access Point sends, comprise the Resources list that request distributes in the described handover preparation request, according to the Resources list inquiry of the distribution of the request in the described handover preparation request and the operating position of the own current resource of acquisition, and the response message by described handover preparation request is the relevant information of described acquisition, and the access network information of described each target access correspondence sends to described Service Access Point;
B12, described Service Access Point are known the resource operating position of described each target access from the response message of described handover preparation request, and the access network information of described each target access correspondence.
9, according to any described method of claim 5～7, it is characterized in that described step B1 or step B4 or step B7 also comprise:
Service quality QoS or service price according to each target access bearer service sort selected target access.
10, method according to claim 5 is characterized in that, described step B2 specifically comprises:
Preferred network type tabulation and the preferred target access ID tabulation of described Service Access Point by carrying in the switching initialization response message sends to terminal with the identification information of a plurality of target access of described selection and the access network of described a plurality of target access correspondences.
CN200610000275A 2006-01-10 2006-01-10 Method for terminal switching between heterogeneous network Expired - Fee Related CN100596228C (en)

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