CN103533612A - Access network switching method, access network discovery support functions (ANDSF) entity and terminal - Google Patents
Access network switching method, access network discovery support functions (ANDSF) entity and terminal Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
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Abstract
The invention provides an access network switching method, an access network discovery and selection function entity and a terminal, which are used for solving the problems in the prior art that power consumption is higher and the switching time is longer when the terminal is used for carrying out access network selection and switching. The method comprises the following steps that the access network discovery support functions (ANDSF) receive an access network inquiring request when the terminal accessed into a first access network carries out access network switching and the access network inquiring request carries a mark and position information of the terminal; the ANDSF determine at least one available second access network information in the region of the terminal according to the position information of the terminal; and the ANDSF send the second access network information and a network selecting policy to the terminal so that the terminal selects a target access network from the second access network information according to the network selecting policy and is switched into the target access network.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of Access Network changing method, access network discovery and selection functional entity and terminal.
Background technology
In prior art, when a plurality of heterogeneous network access mobile core net, terminal mainly realizes discovery and the selection of Access Network by access network discovery and selection functional entity ANDSF.Wherein, in ANDSF, store the pre-configured Access Network information of operator.When needs switch, terminal sends Access Network information request to ANDSF, obtains the Access Network information in self region, and selects Access Network to switch according to the selection strategy that Access Network information and ANDSF issue.
Yet in prior art, due to reasons such as network congestion or network failures, cause not necessarily available Access Network of Access Network corresponding to the Access Network information of storing in ANDSF, in addition, although terminal itself has periodic scan mechanism, but scanning result is corresponding, it is the situation of Access Network in point terminal region sometime before switching, the truth of Access Network in terminal region during not corresponding switching, therefore, when terminal is selected before Access Network to need Access Network corresponding to Access Network information again to scan, judge that whether Access Network is available, thereby the power consumption while causing terminal to be switched is higher, switching time is longer.
Summary of the invention
The invention provides a kind of Access Network changing method, access network discovery and selection functional entity and terminal, power consumption higher and switching time of longer problem when carrying out access network selection and switching for solving prior art terminal.
First aspect of the present invention is to provide a kind of Access Network changing method, comprising:
Access network discovery and selection functional entity ANDSF receive the terminal of access the first Access Network in the Access Network inquiry request of carrying out sending when Access Network switches, and carry sign and the positional information of described terminal in described Access Network inquiry request;
Described ANDSF, according to the positional information of described terminal, determines at least one the available second Access Network information in described terminal region, and described the second Access Network information comprises type and the second Access Network sign of described the second Access Network;
Described ANDSF sends to described terminal according to the sign of described terminal by described the second Access Network information and network selection strategy, so that described terminal is according to described network selection strategy select target Access Network from described the second Access Network information, and switch to described target access network.
Second aspect of the present invention is to provide a kind of Access Network changing method, comprising:
Access the terminal of the first Access Network carrying out when Access Network switches sending Access Network inquiry request to access network discovery and selection functional entity ANDSF, in described Access Network inquiry request, carry sign and the positional information of described terminal;
Described terminal receives available at least one the second Access Network information and the network selection strategy in the described terminal region that described ANDSF sends, and described the second Access Network information comprises type and the second Access Network sign of described the second Access Network;
Described terminal is according to described network selection strategy select target Access Network from described the second Access Network information, and switches to described target access network.
The 3rd aspect of the present invention provides a kind of access network discovery and selection functional entity, comprising:
Receiver module, for receiving the Access Network inquiry request of terminal transmission when carrying out Access Network switching of access the first Access Network, carries sign and the positional information of described terminal in described Access Network inquiry request;
Determination module, for according to the positional information of described terminal, determines at least one the available second Access Network information in described terminal region, and described the second Access Network information comprises type and the second Access Network sign of described the second Access Network;
Sending module, for described the second Access Network information and network selection strategy being sent to described terminal according to the sign of described terminal, so that described terminal is according to described network selection strategy select target Access Network from described the second Access Network information, and switch to described target access network.
The 4th aspect of the present invention provides a kind of terminal, comprising:
Sending module, be used in the described terminal that accesses the first Access Network when carrying out Access Network switching, to access network discovery and selection functional entity ANDSF, send Access Network inquiry request, in described Access Network inquiry request, carry sign and the positional information of described terminal;
Receiver module, for receiving available at least one the second Access Network information and the network selection strategy in the described terminal region that described ANDSF sends, described the second Access Network information comprises type and the second Access Network sign of described the second Access Network;
Handover module, for according to described network selection strategy from described the second Access Network information select target Access Network, and switch to described target access network.
In the present invention, the Access Network inquiry request that ANDSF sends when carrying out Access Network switching according to terminal, available Access Network information and network selection strategy in terminal region are sent to terminal, so that terminal can directly be switched according to network selection strategy select target Access Network from available Access Network information, reduce power consumption when terminal is switched, shortened the switching time of terminal.
Accompanying drawing explanation
Fig. 1 is the flow chart of an embodiment of Access Network changing method provided by the invention;
Fig. 2 is the system architecture diagram of 3GPP definition;
Fig. 3 is the flow chart of another embodiment of Access Network changing method provided by the invention;
Fig. 4 is the flow chart of another embodiment of Access Network changing method provided by the invention;
Fig. 5 is the structural representation of access network discovery provided by the invention and an embodiment of selection functional entity;
Fig. 6 is the structural representation of an embodiment of terminal provided by the invention;
Fig. 7 is the structural representation of another embodiment of terminal provided by the invention.
Embodiment
For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 1 is the flow chart of an embodiment of Access Network changing method provided by the invention, as shown in Figure 1, comprising:
101, access network discovery and selection functional entity (Access Network Discovery Support Functions, ANDSF) terminal that receives access the first Access Network is in the Access Network inquiry request of carrying out sending when Access Network switches, the sign of carried terminal and positional information in Access Network inquiry request.
ANDSF is 3GPP(The3rd Generation Partnership Project) the network selection policy unit that proposes of tissue, it has data management and controls function, can response terminal carry out the request sending when access network is selected, provide access network in terminal region and terminal to carry out access network and select required auxiliary data.As shown in Figure 2, wherein, ANDSF and terminal can be carried out by S14 interface the safe transmission of data to the system architecture diagram of 3GPP definition.
ANDSF specifically can comprise for the information that terminal provides: routing policy between mobility strategy, access network discovery information and system between system.Wherein, between system, mobility strategy has stipulated whether allow terminal to carry out the movement between system, and for terminal, selects most suitable connecting system and switch.For example, between system, mobility strategy can define the priority of each connecting system.Access network discovery information can be all Access Network information in terminal region.Between system, routing policy is used for stipulating whether specific Business Stream or specific Access Point Name (APN) allow to be linked into certain connecting system.
In addition, ANDSF can also based on carrier policy or the Access Network information sending based on terminal periodic between system between mobility strategy or system routing policy modify.
102, ANDSF, according to the positional information of terminal, determines at least one the available second Access Network information in terminal region, and the second Access Network information comprises type and the second Access Network sign of the second Access Network.
Wherein, the second Access Network information refers to, and ANDSF does not break down in region, and Access Network information corresponding to the Access Network not getting congestion.
The type of Access Network specifically can comprise: worldwide interoperability for microwave access (Worldwide Interoperability for Microwave Access, WiMax), WLAN (Wireless Local Area Networks, WLAN), CDMA2000(Code Division Multiple Access2000), HRPD (high rate packet data) (High Rate Packet Data, HRPD) etc.Access Network sign refers to sign that can unique identification Access Network.For example, when the type of Access Network is WLAN, the sign of Access Network can be service set (Service Set Identifier, SSID).
103, ANDSF sends to terminal according to the sign of terminal by the second Access Network information and network selection strategy, so that terminal is according to network selection strategy select target Access Network from the second Access Network information, and switches to target access network.
In the present embodiment, the Access Network inquiry request that ANDSF sends when carrying out Access Network switching according to terminal, available Access Network information and network selection strategy in terminal region are sent to terminal, so that terminal can directly be switched according to network selection strategy select target Access Network from available Access Network information, reduce power consumption when terminal is switched, shortened the switching time of terminal.
Fig. 3 is the flow chart of another embodiment of Access Network changing method provided by the invention, and as shown in Figure 3, on basis embodiment illustrated in fig. 1, step 102 specifically can comprise:
1021, ANDSF is according to the positional information of terminal, determines in all the 3rd Access Network information in terminal region and terminal region the sign with the other-end of the mutual mistake of ANDSF.
In ANDSF, can preserve the Access Network information that covers regional, the process of determining all the 3rd Access Network information in terminal region is specifically as follows: terminal is determined the region at own place, to the ANDSF that stores all Access Networks in this region, send request, obtain the Access Network information of all Access Networks that cover this region.In ANDSF, also store sign and positional information with all terminals of the mutual mistake of ANDSF.ANDSF can, according to the positional information of terminal, obtain sign in terminal region and the other-end mutual mistake of ANDSF.
1022, ANDSF sends inquiry request to other-end, and inquiry request is for obtaining congestion information or the fault message of Access Network corresponding to the 3rd Access Network information.
Particularly, ANDSF can select one of them terminal in other-end to send inquiry request, congestion information or the fault message of the Access Network that acquisition request the 3rd Access Network information is corresponding.In inquiry request, can carry the IP address of ANDSF.If the terminal that ANDSF select to send inquiry request at present not at the regional level in, another terminal that ANDSF can reselect in other-end sends inquiry request.
Further, other-end can be before receiving the inquiry request of ANDSF transmission, obtain all the 3rd Access Network information in self region, according to all the 3rd Access Network information in self region, corresponding Access Network is carried out to periodic scan, obtain congestion information or the fault message of the 3rd Access Network.
1023, ANDSF receives other-end, according to the 3rd Access Network information, corresponding Access Network is carried out to definite Access Network congestion information or fault message after periodic scan.
Wherein, Access Network congestion information specifically can refer to, Access Network is current in congestion state, i.e. the ratio of the terminal quantity of the current access of Access Network and accessible total number of terminals amount surpasses default threshold value.Fault message refers to, and Access Network is current in malfunction.
1024, ANDSF, according to the 3rd Access Network information and Access Network congestion information or fault message, determines the second available Access Network information.
ANDSF can will not have in congestion state in the 3rd Access Network, and the Access Network information that Access Network in malfunction is not corresponding is as the second Access Network information, and the second Access Network information is sent to terminal, so that terminal switches to the second Access Network according to the second Access Network information.
In the present embodiment, the Access Network inquiry request that ANDSF sends when carrying out Access Network switching according to terminal, obtain all Access Network information in terminal region, and by carrying out alternately with other-end, obtain all Access Network information corresponding congestion information or fault message, according to congestion information or fault message, determine Access Network information available in all Access Network information, available Access Network information and network selection strategy are sent to terminal, so that terminal can directly be switched according to network selection strategy select target Access Network from available Access Network information, reduced power consumption when terminal is switched, shortened the switching time of terminal.
Fig. 4 is the flow chart of another embodiment of Access Network changing method provided by the invention, as shown in Figure 4, comprising:
401, the terminal that accesses the first Access Network is carrying out when Access Network switches sending Access Network inquiry request, the sign of carried terminal and positional information in Access Network inquiry request to access network discovery and selection functional entity ANDSF.
Wherein, before terminal sends Access Network inquiry request to ANDSF, can also send DynamicHost to ANDSF server agreement (Dynamic Host Configuration Protocol is set, DHCP) inquiry request, obtain agreement (the Internet Protocol interconnecting between the network of ANDSF, IP) address or full name domain-name information (Fully Qualified Domain Name, FQDN), if that terminal is obtained from Dynamic Host Configuration Protocol server is FQDN, terminal can also be to domain name system (Domain Name System, DNS) server request obtains the IP address of the ANDSF that FQDN is corresponding, terminal, according to the IP address of ANDSF, is set up safety with ANDSF and is connected, and by S14 interface transmission data.
402, available at least one the second Access Network information and network selection strategy in the terminal region that terminal reception ANDSF sends, the second Access Network information comprises type and the second Access Network sign of the second Access Network.
403, terminal is according to network selection strategy select target Access Network from the second Access Network information, and switches to target access network.
Wherein, network selection strategy can also comprise: routing policy between mobility strategy and system between system.Corresponding, terminal is according to network selection strategy select target Access Network from the second Access Network information, and switch to target access network, specifically can comprise: terminal is according to the type of the second Access Network and the second Access Network sign, mobility strategy between employing system, determines that the type of target access network and target access network identify; Terminal is according to the type of target access network and target access network sign, and routing policy between employing system, determines the access point that target access network is corresponding; Terminal switches to target access network by access point corresponding to target access network.
The priority that wherein, can also comprise each connecting system between system in mobility strategy.For example, the priority that between system, mobility strategy can define connecting system WiMAX is higher than connecting system WLAN, and when the former connecting system of terminal is WLAN, terminal just can, according to mobility strategy between default system, select WiMAX to switch.
Between system, routing policy is specifically for regulation, and whether specific Business Stream or specific Access Point Name (Access Point Name, APN) allow to be linked in certain connecting system.
Further, terminal is according to network selection strategy select target Access Network from the second Access Network information, and after switching to target access network, can also comprise:
Terminal is obtained all the 3rd Access Network information in terminal region;
Terminal is carried out periodic scan to Access Network corresponding to the 3rd Access Network information, obtains congestion information or the fault message of the 3rd Access Network.
In the present embodiment, terminal is carrying out when Access Network switches sending Access Network inquiry request to ANDSF, available Access Network information and network selection strategy in the terminal region of returning according to ANDSF, directly according to network selection strategy select target Access Network from available Access Network information, switch, reduce power consumption when terminal is switched, shortened the switching time of terminal.
One of ordinary skill in the art will appreciate that: all or part of step that realizes above-mentioned each embodiment of the method can complete by the relevant hardware of program command.Aforesaid program can be stored in a computer read/write memory medium.This program, when carrying out, is carried out the step that comprises above-mentioned each embodiment of the method; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CDs.
Fig. 5 is the structural representation of access network discovery provided by the invention and an embodiment of selection functional entity, as shown in Figure 5, comprising:
Sending module 53, for according to the sign of terminal, the second Access Network information and network selection strategy being sent to terminal, so that terminal is according to network selection strategy select target Access Network from the second Access Network information, and switches to target access network.
Further, determination module 52 specifically for, according to the positional information of terminal, determine all the 3rd Access Network information in terminal region and the sign of the other-end in terminal region;
Sending module 53 also for, to other-end, send inquiry request, inquiry request is for obtaining congestion information or the fault message of Access Network corresponding to the 3rd Access Network information;
In the present embodiment, the Access Network inquiry request that ANDSF sends when carrying out Access Network switching according to terminal, available Access Network information and network selection strategy in terminal region are sent to terminal, so that terminal can directly be switched according to network selection strategy select target Access Network from available Access Network information, reduce power consumption when terminal is switched, shortened the switching time of terminal.
Fig. 6 is the structural representation of an embodiment of terminal provided by the invention, as shown in Figure 6, comprising:
Sending module 61, is carrying out when Access Network switches sending Access Network inquiry request, the sign of carried terminal and positional information in Access Network inquiry request to access network discovery and selection functional entity ANDSF for the terminal at access the first Access Network;
Further, network selection strategy can also comprise: routing policy between mobility strategy and system between system; Handover module 63 specifically can be for, and according to the type of the second Access Network and the second Access Network sign, mobility strategy between employing system, determines type and the target access network sign of target access network; According to the type of target access network and target access network sign, routing policy between employing system, determines the access point that target access network is corresponding; The access point corresponding by target access network switches to target access network.
Further, described terminal can also comprise: acquisition module 64, as shown in Figure 7, acquisition module 64 for, at handover module 63 according to network selection strategy select target Access Network from the second Access Network information, and after switching to target access network, obtain all the 3rd Access Network information in terminal region;
The Access Network corresponding to the 3rd Access Network information carries out periodic scan, obtains congestion information or the fault message of the 3rd Access Network.
In the present embodiment, terminal is carrying out when Access Network switches sending Access Network inquiry request to ANDSF, available Access Network information and network selection strategy in the terminal region of returning according to ANDSF, directly according to network selection strategy select target Access Network from available Access Network information, switch, reduce power consumption when terminal is switched, shortened the switching time of terminal.
Finally it should be noted that: each embodiment, only in order to technical scheme of the present invention to be described, is not intended to limit above; Although the present invention is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or some or all of technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (10)
1. an Access Network changing method, is characterized in that, comprising:
Access network discovery and selection functional entity ANDSF receive the terminal of access the first Access Network in the Access Network inquiry request of carrying out sending when Access Network switches, and carry sign and the positional information of described terminal in described Access Network inquiry request;
Described ANDSF, according to the positional information of described terminal, determines at least one the available second Access Network information in described terminal region, and described the second Access Network information comprises type and the second Access Network sign of described the second Access Network;
Described ANDSF sends to described terminal according to the sign of described terminal by described the second Access Network information and network selection strategy, so that described terminal is according to described network selection strategy select target Access Network from described the second Access Network information, and switch to described target access network.
2. method according to claim 1, is characterized in that, described ANDSF, according to the positional information of described terminal, determines at least one the available second Access Network information in described terminal region, comprising:
Described ANDSF is according to the positional information of described terminal, determines in all the 3rd Access Network information in described terminal region and described terminal region the sign with the other-end of the mutual mistake of described ANDSF;
Described ANDSF sends inquiry request to described other-end, and described inquiry request is for obtaining congestion information or the fault message of Access Network corresponding to described the 3rd Access Network information;
Described ANDSF receives described other-end Access Network corresponding to described the 3rd Access Network information is carried out to Access Network congestion information or the fault message that periodic scan obtains;
Described ANDSF, according to described the 3rd Access Network information and described Access Network congestion information or fault message, determines available described the second Access Network information.
3. an Access Network changing method, is characterized in that, comprising:
Access the terminal of the first Access Network carrying out when Access Network switches sending Access Network inquiry request to access network discovery and selection functional entity ANDSF, in described Access Network inquiry request, carry sign and the positional information of described terminal;
Described terminal receives available at least one the second Access Network information and the network selection strategy in the described terminal region that described ANDSF sends, and described the second Access Network information comprises type and the second Access Network sign of described the second Access Network;
Described terminal is according to described network selection strategy select target Access Network from described the second Access Network information, and switches to described target access network.
4. method according to claim 3, is characterized in that, described terminal is according to described network selection strategy select target Access Network from described the second Access Network information, and after switching to described target access network, also comprises:
Described terminal is obtained all the 3rd Access Network information in described terminal region;
Described terminal is carried out periodic scan to Access Network corresponding to described the 3rd Access Network information, obtains congestion information or the fault message of the 3rd Access Network.
5. according to the method described in claim 3 or 4, it is characterized in that, described network selection strategy comprises: routing policy between mobility strategy and system between system;
Described terminal is according to described network selection strategy select target Access Network from described the second Access Network information, and switches to described target access network, comprising:
Described terminal, according to the type of described the second Access Network and the second Access Network sign, adopts mobility strategy between described system, determines type and the target access network sign of target access network;
Described terminal, according to the type of described target access network and described target access network sign, adopts routing policy between described system, determines the access point that described target access network is corresponding;
Described terminal switches to described target access network by access point corresponding to described target access network.
6. access network discovery and a selection functional entity, is characterized in that, comprising:
Receiver module, for receiving the Access Network inquiry request of terminal transmission when carrying out Access Network switching of access the first Access Network, carries sign and the positional information of described terminal in described Access Network inquiry request;
Determination module, for according to the positional information of described terminal, determines at least one the available second Access Network information in described terminal region, and described the second Access Network information comprises type and the second Access Network sign of described the second Access Network;
Sending module, for described the second Access Network information and network selection strategy being sent to described terminal according to the sign of described terminal, so that described terminal is according to described network selection strategy select target Access Network from described the second Access Network information, and switch to described target access network.
7. access network discovery according to claim 6 and selection functional entity, is characterized in that, described determination module specifically for,
According to the positional information of described terminal, determine all the 3rd Access Network information in described terminal region and the sign of the other-end in described terminal region;
Described sending module also for, to described other-end, send inquiry request, described inquiry request is for obtaining congestion information or the fault message of Access Network corresponding to described the 3rd Access Network information;
Described receiver module also for, receive described other-end Access Network corresponding to described the 3rd Access Network information carried out to Access Network congestion information or the fault message that periodic scan obtains;
Described determination module specifically also for, according to described the 3rd Access Network information and described Access Network congestion information or fault message, determine available described the second Access Network information.
8. a terminal, is characterized in that, comprising:
Sending module, carrying out when Access Network switches sending Access Network inquiry request to access network discovery and selection functional entity ANDSF, carries sign and the positional information of described terminal for the described terminal at access the first Access Network in described Access Network inquiry request;
Receiver module, for receiving available at least one the second Access Network information and the network selection strategy in the described terminal region that described ANDSF sends, described the second Access Network information comprises type and the second Access Network sign of described the second Access Network;
Handover module, for according to described network selection strategy from described the second Access Network information select target Access Network, and switch to described target access network.
9. terminal according to claim 8, is characterized in that, also comprises: acquisition module;
Described acquisition module is used for, and at described handover module, according to described network selection strategy select target Access Network from described the second Access Network information, and after switching to described target access network, obtains all the 3rd Access Network information in described terminal region;
Access Network corresponding to described the 3rd Access Network information carried out to periodic scan, obtain congestion information or the fault message of the 3rd Access Network.
10. terminal according to claim 8 or claim 9, is characterized in that, described network selection strategy comprises: routing policy between mobility strategy and system between system;
Described handover module specifically for,
According to the type of described the second Access Network and the second Access Network sign, adopt mobility strategy between described system, determine type and the target access network sign of target access network;
According to the type of described target access network and described target access network sign, adopt routing policy between described system, determine the access point that described target access network is corresponding;
By access point corresponding to described target access network, switch to described target access network.
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| WO2023029601A1 (en) * | 2021-08-30 | 2023-03-09 | 华为技术有限公司 | Terminal roaming control method and apparatus, and roaming policy library generation method and apparatus |
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