CN101541064A - Network discovery and selection method, network system and device - Google Patents
Network discovery and selection method, network system and device Download PDFInfo
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- CN101541064A CN101541064A CN200810084022A CN200810084022A CN101541064A CN 101541064 A CN101541064 A CN 101541064A CN 200810084022 A CN200810084022 A CN 200810084022A CN 200810084022 A CN200810084022 A CN 200810084022A CN 101541064 A CN101541064 A CN 101541064A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W48/18—Selecting a network or a communication service
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Abstract
The embodiment of the invention discloses a network discovery and selection method, a network system and a device. The method comprises that: a first access network discovery and selection functional entity ANDSF acquires network situation information through interaction with a second ANDSF after a user terminal access a network; and the first ANDSF sends the network situation information to the user terminal to perform target network selection or select a target network for the user terminal according to the network situation information. Correspondingly, the embodiment of the invention also provides a network system and a device. The technical proposal provided by the embodiment of the invention can achieve network discovery and selection treatment more simply.
Description
Technical field
The present invention relates to communication technical field, be specifically related to a kind of network discovery and system of selection, network system and device.
Background technology
3GPP (The 3rd Generation Partnership Project, third generation partner plan) LTE (the Long Term Evolution that formulates, the Long Term Evolution plan) defined the framework of new mobile communications network in, be called EPS (evolved packet system, the packet network of evolution).The key property of EPS is the fusion of having considered plurality of access modes, allow the network insertion EPS network of non-3GPP (non-3GPP), non-3GPP network described here comprises WiMax (Worldwide Interoperability forMicrowave Access, the worldwide interoperability for microwave access), WLAN (Wireless Local Area Network WLAN (wireless local area network)), CDMA (Code Division Multiple Access, code division multiple access) etc.Need for operation, prior art proposes unified network and finds and the imagination of selecting, promptly behind user terminal UE access network, by (the Access Network Discovery and SelectionFunction of an ANDSF in the network, access network discovery and selection functional entity) the network condition information (as load condition etc.) of collecting relevant access network, and according to the corresponding strategies of operator (the Access Network mode that can use as current UE) with utilize that the RST etc. of the peripheral network that UE collects is common to be objective network of UE selection, when condition met, the user can switch in other the Access Network.
Seeing also Fig. 1, is that the network of prior art is found and the configuration diagram of selecting.
As shown in Figure 1, access way comprises that 3GPP inserts and non-3GPP inserts, and all disposes ANDSF on visit ground and ownership place.Sx is the reference point interface between UE and the ANDSF among Fig. 1, and promptly UE can be connected to ANDSF by 3GPP access or credible and incredible non-3GPP access way; ANDSF can also be connected to the non-3 GPP access network network by the Sy interface, thus the information such as load condition of collection network.Under this framework, the UE of roaming can pass through DNS (DomainName Service when being registered to network, domain name service) mode such as parsing selects to visit the vANDSF on ground and the hANDSF of ownership place simultaneously, UE obtains corresponding strategies information and network condition information from hANDSF and vANDSF respectively, finishes network and finds to handle with selection.
In research and practice process to prior art, the inventor finds that there is following problem in prior art:
The architecture and method of prior art, the ANDSF on ownership place and visit ground does not carry out information interaction, and UE always needs to select two ANDSF to carry out interaction process, and process is too complicated, and applicability is not strong.
Summary of the invention
The technical problem that the embodiment of the invention will solve provides a kind of network discovery and system of selection, network system and device, can find to handle with selection by simpler realization network.
For solving the problems of the technologies described above, embodiment provided by the present invention is achieved through the following technical solutions:
The embodiment of the invention provides a kind of network to find and system of selection, comprising: behind accessing user terminal to network, first access network discovery and selection functional entity ANDSF by with the network condition information of obtaining alternately of the 2nd ANDSF; A described ANDSF sends to described user terminal with described network condition information and carries out the objective network selection, is described user terminal selecting objective network according to described network condition information perhaps.
The embodiment of the invention provides a kind of network system, comprise: first access network discovery and selection functional entity ANDSF, be used for behind accessing user terminal to network, by with the network condition information of obtaining alternately of the 2nd ANDSF, described network condition information being sent to described user terminal carry out the objective network selection, is described user terminal selecting objective network according to described network condition information perhaps; The 2nd ANDSF is used for carrying out information interaction with a described ANDSF.
The embodiment of the invention provides a kind of device, comprising: interactive unit, be used for behind accessing user terminal to network, by with outer access network discovery of local terminal network and the network condition information of obtaining alternately of selection functional entity ANDSF; Processing unit is used for that described network condition information is sent to described user terminal and carries out the objective network selection, is described user terminal selecting objective network according to described network condition information perhaps.
Technique scheme as can be seen, in the embodiment of the invention technical scheme behind accessing user terminal to network, by between different access network discoveries and selection functional entity ANDSF by obtaining network condition information alternately, therefore user terminal only need be visited one of them ANDSF, just can obtain network side and carry out the network condition information that obtains after the information interaction by this ANDSF, thereby carry out respective handling, perhaps get access to network side and carry out the objective network information selected according to interaction results after the information interaction, thereby can simpler realization network find and select to handle.
Description of drawings
Fig. 1 is that the network of prior art is found and the configuration diagram of selecting;
Fig. 2 is the embodiment of the invention one network architecture schematic diagram;
Fig. 3 is the embodiment of the invention one method flow diagram;
Fig. 4 is that UE initiatively initiates the flow chart of asking in the embodiment of the invention one method;
Fig. 5 is the flow chart of ANDSF active photos and sending messages under UE in this inventive embodiments one method;
Fig. 6 is a flow chart of being finished handover decisions in the embodiment of the invention one method by vANDSF;
Fig. 7 is a flow chart of being finished handover decisions in the embodiment of the invention one method by hANDSF;
Fig. 8 transfers the flow chart that hANDSF finishes handover decisions to by vANDSF in the embodiment of the invention one method;
Fig. 9 is the embodiment of the invention two network architecture schematic diagrames;
Figure 10 is the embodiment of the invention two method flow diagrams;
Figure 11 is that UE initiatively initiates the flow chart of asking in the embodiment of the invention two methods;
Figure 12 is the flow chart of ANDSF active photos and sending messages under UE in these inventive embodiments two methods;
Figure 13 is a flow chart of being finished handover decisions in the embodiment of the invention two methods by vANDSF;
Figure 14 is a flow chart of being finished handover decisions in the embodiment of the invention two methods by hANDSF;
Figure 15 transfers the flow chart that hANDSF finishes handover decisions to by vANDSF in the embodiment of the invention one method;
Figure 16 is the embodiment of the invention three network architecture schematic diagrames;
Figure 17 is the embodiment of the invention three method flow charts;
Figure 18 is that embodiment of the invention network system is unified structural representation;
Figure 19 is embodiment of the invention network system two structural representations;
Figure 20 is an embodiment of the invention apparatus structure schematic diagram.
Embodiment
Carry out the mutual of information by the ANDSF at visit ground and ownership place in the invention process, then UE only need link to each other with one of them ANDSF, just can obtain relevant information, thereby simpler realization network is found and select to handle.
That carries out information in the invention process between the ANDSF of visit ground and ownership place mainly contains two kinds of forms alternately, a kind of is newly-increased mutual interface between vANDSF and the hANDSF, carry out information interaction, another mode is to utilize (the Policy Charging Rule Function of PCRF in the prior art, policy charging rule functional entity) interface, it is the S9 interface between the hPCRF of ownership place and the vPCRF that visits ground, vANDSF can be connected with vPCRF, hANDSF can be connected with hPCRF, thereby carries out information interaction.
The mutual interface that the embodiment of the invention is provided with between vANDSF and hANDSF is called the Sz interface, by transmitting switchover policy, handover decisions, Access Network state information etc. between this interface vANDSF and the hANDSF.When the UE connecting system, can select the ANDSF of local network, promptly, select hANDSF as UE during at ownership place, when UE roam, select vANDSF, and by the ANDSF decision-making of this selection whether also need be UE select one can be by the ANDSF of Sz interface connection.For example when UE in when roaming, vANDSF can be according to being designated it and selecting hANDSF of UE, vANDSF and hANDSF are by the Sz interface communication, UE is just mutual with the vANDSF that directly links to each other, vANDSF can regard the agency of hANDSF as at this moment.
Following method is to illustrate with the processing under the roaming scence, but does not limit to therewith, also is same being suitable under the non-roaming scene.
Seeing also Fig. 2, is the embodiment of the invention one network architecture schematic diagram.
As shown in Figure 2, vANDSF and hANDSF communicate by newly-increased Sz interface; The UE of roaming selects vANDSF (select access zone network during roaming, select belonging area network when non-roaming).VANDSF communicates by Sx interface and UE; HANDSF and vANDSF obtain the information such as network condition of other connecting systems in the present networks by the Sy interface.HANDSF is connected to vANDSF by the Sz interface, and obtains the information such as network condition of visited network by vANDSF.
Seeing also Fig. 3, is the embodiment of the invention one method flow diagram, and UE is in the access zone network among the embodiment one, and visit vANDSF comprises among Fig. 3:
301, UE carries out the registration that register flow path is accomplished to particular access network;
For example can carry out attachment flow and be registered to 3GPP network, WiMax network etc.
302, UE carries out DNS (Domain Name Service, domain name service) parsing or DHCP (Dynamic Host Configuration Protocol, DHCP) flow process is obtained the address of ANDSF, and dns server or Dynamic Host Configuration Protocol server return to UE with the address of the ANDSF of the local network of configuration;
When UE roamed, the ANDSF of residing local network was the vANDSF of roaming place.If write down the address of the ANDSF of residing local network among the UE, then do not need to carry out this dns resolution or DHCP step.
303, UE is initiated to the register flow path of vANDSF, to vANDSF request service;
This register flow path can be the explicit registration that UE initiates, as sending login request message to vANDSF; Also can be the registration of an implicit expression, send strategy request message or send the measurement report etc. of peripheral network to vANDSF as UE.If UE has write down the address (can be that the pre-configured or network of UE dynamically provides) of ownership place hANDSF, then in message, carry the address of hANDSF and give vANDSF.
This vANDSF can set up and safeguard a context, recording-related information for UE.
304, vANDSF is registered to hANDSF with UE;
VANDSF finds that this UE is a roamer, then the information of home location that provides according to UE is selected a hANDSF for this UE, for example can be according to hPLMN ID (the home Public LandMobile Network of UE, ownership place Public Land Mobile Nerwork sign) carrying out dns resolution obtains the hANDSF address, perhaps a hANDSF is determined for this UE in the hANDSF address that provides according to UE, initiate register flow path to this hANDSF then, this UE is registered to this hANDSF.
This register flow path can be an explicit registration, sends login request message as vANDSF to hANDSF; Also can be the registration of an implicit expression, send strategy request message or send the measurement report etc. of peripheral network to hANDSF as vANDSF.
This hANDSF can set up and safeguard a context, recording-related information for UE.
305, carrying out network between UE, hANDSF and the vANDSF finds and the relevant treatment of selecting.
In this step, different according to the network discovery with the decision-maker of selecting, specifically can be divided into several situations again.
Processing when 1) making a strategic decision by UE fully
Under this handover decisions method, ANDSF provides policy information and/or network of relation state information to UE, and the information that UE provides according to ANDSF judges whether that needs switch and switch to which purpose network.
Therefore, under embodiment of the invention framework, the policy information that hANDSF is relevant with this UE sends to vANDSF, and the policy information that vANDSF provides according to hANDSF is collected the condition information of network of relation, and relevant policy information and network condition information is sent to UE.UE can carry out handover decisions according to the information that vANDSF provides, i.e. whether decision needs to switch and switch to which purpose network.
UE be can be divided into this moment again and the situation of strategy request and the situation of network side active distributing policy information initiatively initiated.
UE is being registered to process that ANDSF initiatively initiates (comprise and be registered to vANDSF and hANDSF) strategy request afterwards as shown in Figure 4, comprising:
401, UE sends strategy request message to vANDSF, with acquisition strategy information;
402, after vANDSF receives this strategy request message, send strategy request message to hANDSF;
During this, vANDSF can obtain network condition to network of relation, and also the policy information that can provide according to hANDSF after step 403 obtains network condition to particular network again.
403, the hANDSF policy information that can ownership place be provided with according to the UE current position information (as available network in this visit ground and selection priority etc.) sends to vANDSF;
404, the situation of the policy information that provides according to hANDSF of vANDSF and the network of relation that obtains provides the policy information of switching to UE;
405, UE makes a strategic decision according to the policy information that vANDSF sends.
UE can carry out handover decisions according to the information that vANDSF provides, i.e. whether decision needs to switch and switch to which purpose network.
Need to prove that follow-up UE can be again sends strategy request message to vANDSF, to obtain updating strategy information, then the information obtained respectively after the renewal of vANDSF and hANDSF is handled.
Be registered to ANDSF (comprise and be registered to vANDSF and hANDSF) afterwards at UE, by one of them ANDSF be vANDSF or hANDSF initiatively send flow process from policy information to UE as shown in Figure 5, comprising:
501, the hANDSF policy information that can ownership place be provided with according to the UE current position information (as available network in this visit ground and selection priority etc.) sends to vANDSF;
502, the situation of the policy information that provides according to hANDSF of vANDSF and the network of relation that obtains provides the policy information of switching to UE;
503, UE makes a strategic decision according to the policy information that vANDSF sends.
UE can carry out handover decisions according to the information that vANDSF provides, i.e. whether decision needs to switch and switch to which purpose network.
Need to prove that the roaming agreement of Radix Angelicae Sinensis possession and roaming place changes or the corresponding strategies information of this UE changes, then hANDSF can send to updating strategy information (as the available network in this visit ground and select priority etc.) vANDSF.VANDSF can be included in relevant information in the policy update message and send to UE after receiving the policy update information that hANDSF provides or be checked through the network of relation situation and changing, and finishes follow-up hand-off process by UE according to the policy information after upgrading.
Processing when 2) making a strategic decision by ANDSF fully.
Under this handover decisions method, UE reports the measurement report of peripheral network to ANDSF, and the measurement report that ANDSF reports according to switchover policy and the UE of this UE is for UE carries out handover decisions, and the result of decision sent to UE, UE finishes follow-up hand-off process according to this result.In the case, UE can not need to obtain the policy information that ANDSF sends, and directly receives the result of decision that ANDSF issues and handles.
Under this handover decisions method, because in fact the ANDSF that serves for UE exists two, i.e. therefore vANDSF and hANDSF, can be divided into following three kinds of situations according to the difference of handover decisions point again:
A: finish handover decisions by vANDSF fully
Under this scene, vANDSF is the final decision point that switches, hANDSF provides this UE to switch required policy information (as available network in this visit ground and selection priority etc.) to vANDSF, vANDSF collects the state information (as the load condition of current network) of network of relation, and UE reports the measurement report of peripheral network to vANDSF.VANDSF for this UE carries out handover decisions, and sends to UE with handover decisions (as switching to which objective network) according to the information of above-mentioned acquisition.
Finish the handover decisions detailed process by vANDSF and see also shown in Figure 6ly, comprising:
601, UE sends measurement report to vANDSF;
602, vANDSF sends strategy request message to hANDSF;
If do not write down the policy information that hANDSF provides among the vANDSF, then send strategy request message to hANDSF.
After vANDSF receives the measurement report of UE, can obtain network condition information to network of relation immediately.
603, the hANDSF policy information that can ownership place be provided with according to the UE current position information (as available network in this visit ground and selection priority etc.) sends to vANDSF;
604, the policy information that provides according to hANDSF of vANDSF, the situation of collecting network of relation is carried out handover decisions, and the result of decision is sent to UE, carries out follow-up hand-off process by UE according to the result of decision.
Wherein said network of relation situation can adopt the information of having preserved among the vANDSF, also can obtain the network condition that flow process is obtained renewal to network of relation initiation state by vANDSF.
Need to prove that the policy information that vANDSF obtains hANDSF to be provided can be as obtaining by independent flow process in step 602 and 603, also can be just to have obtained the policy information that hANDSF provides in the UE registration process.
In addition, the roaming agreement of Radix Angelicae Sinensis possession and roaming place changes or the corresponding strategies information of this UE changes, and then hANDSF can send to updating strategy information (as the available network in this visit ground and select priority etc.) vANDSF.VANDSF is according to the information of above-mentioned acquisition and the corresponding strategies of operator, for this UE carries out handover decisions, and handover decisions (as switching to which objective network) sent to UE.
If in some cases, vANDSF can not finish handover decisions, for example when UE is in the boundary of this visited network and is ready switching to other networks, the access network that vANDSF controlled can not satisfy the switching needs of UE, need send to UE this moment for this UE selects the Access Network information of other networks, switches to new network to instruct UE.At this moment, vANDSF can not obtain the information of this purpose network, so vANDSF needs the help of hANDSF, can carry out following process:
When vANDSF can't finish handover decisions, send strategy request message to hANDSF, require hANDSF that the access network resource of other networks of current UE present position (being different from current visited network) is provided; The position that hANDSF is current according to UE, according to carrier policy, select the available access network resource information of other networks of current location (new visited network or home network), and can provide the situation of relevant Access Network by the vANDSF of these Access Network place networks, load condition for example, and the situation of these policy informations and Access Network is sent to the vANDSF of the request of initiation.VANDSF carries out handover decisions after receiving these information, selects the objective network of a switching for UE.In addition, if UE need move back to home network, then hANDSF can directly obtain the Access Network situation of present networks, and does not need to obtain relevant information by new vANDSF.
B: finish handover decisions by hANDSF fully
Under this scene, hANDSF is final handover decisions point, and vANDSF transmits the measurement report that UE reports to hANDSF, and the network state that visited network is relevant reports to hANDSF.
Finish the handover decisions detailed process by hANDSF and see also shown in Figure 7ly, comprising:
701, UE sends measurement report to vANDSF;
702, vANDSF transmits measurement report to hANDSF, and the state information that simultaneously also can carry network of relation in this message is as load condition etc.;
703, the hANDSF measurement report that can report according to UE, that vANDSF provides or be kept at the state information of the network of relation among the hANDSF and carrier policy etc. and carry out handover decisions, be the purpose network of UE selection switching, and the result of decision is sent to vANDSF;
In this step, the measurement report that hANDSF also can report according to UE, decision-making need switch to other visited network or home network.At this moment, hANDSF can obtain available Access Network information to vANDSF or this hANDSF of other visited network, and for this UE selects other the suitable visited network or the Access Network of home network, and this result of decision is sent to vANDSF.
704, vANDSF sends to UE with the result of decision that hANDSF provides, and carries out follow-up hand-off process by UE according to the result of decision.
Under this method, when the UE initial registration, hANDSF still can send to vANDSF with policy information, and vANDSF can come the report network situation according to policy information (as signatory Access Network and priority etc.).
C: transfer hANDSF to by vANDSF and finish handover decisions
When carrying out handover decisions, under some particular case, may change and carry out handover decisions by hANDSF by vANDSF.When vANDSF can't carry out handover decisions for UE, require hANDSF to carry out handover decisions, the handover decisions point changes hANDSF into, after hANDSF carries out handover decisions, the result of decision is sent to UE by vANDSF.
Transfer hANDSF to by vANDSF and finish the handover decisions detailed process and see also shown in Figure 8ly, comprising:
801, UE sends measurement report to vANDSF;
802, vANDSF can't carry out handover decisions for UE, then sends handoff request message to hANDSF, requires hANDSF to carry out handover decisions, can carry the measurement report that UE provides in this handoff request message;
803, hANDSF returns the result of decision to vANDSF;
HANDSF is according to the UE current position information, according to carrier policy, select the available access network resource information of other networks of current location (other visited network or home network), and can provide the situation of relevant Access Network by the vANDSF of these Access Network place networks, load condition for example, measurement report according to UE provides for this UE carries out handover decisions, and sends to vANDSF with the result of handover decisions.
804, vANDSF sends to UE with the result of decision that hANDSF provides, and carries out follow-up handover operation by UE according to this result.
3) make a strategic decision jointly by UE and ANDSF
This processing method and the flow process of being made a strategic decision by ANDSF fully are similar substantially, and difference is that before the UE reporting measurement reports, ANDSF needs to send policy information to UE earlier, and UE is according to this policy information reporting measurement reports then.ANDSF described here can be vANDSF, also can be hANDSF.ANDSF generally can provide policy information to UE in the registration process for the first time at UE, perhaps initiatively provides to UE after policy information changes.
ANDSF generally can comprise to the policy information that UE provides: the Access Network of appointment, the thresholding that reports or frequency etc.UE monitors specified network according to these information, when related data reaches when reporting thresholding, reports the measurement report of specified network to ANDSF.As for the decision-making treatment of ANDSF be consistent by the processing procedure under the ANDSF decision-making fully, repeat no more herein.
In the embodiment of the invention one, UE only need visit vANDSF, just can obtain by utilizing newly-increased interface to carry out the network condition information that obtains after the information interaction between vANDSF and hANDSF by this vANDSF, thereby carry out respective handling, perhaps get access to by utilizing newly-increased interface to carry out the objective network information of selecting according to interaction results after the information interaction between vANDSF and hANDSF, thereby can simpler realization network find and select to handle.
Seeing also Fig. 9, is the embodiment of the invention two network architecture schematic diagrames.The main distinction of the network configuration of embodiment two and enforcement one is that UE is visit hANDSF in the enforcement two.
After UE is registered to access network (as 3GPP or Wimax), can always selects the ANDSF of home network, and whether also need to select one can pass through the ANDSF that the Sz interface connects for UE by the hANDSF decision-making of this selection.Particularly when roaming, UE selected hANDSF, this hANDSF can select the vANDSF of a visited network for it according to the information such as current location of UE, vANDSF and hANDSF are by the Sz interface communication, UE is just mutual with the hANDSF that directly links to each other, vANDSF can provide Access Network information for hANDSF, even carries out handover decisions etc.
What the embodiment of the invention two network architectures were described is UE is registered to hANDSF under the roaming situation situation, when UE roams for generation, always finds the ANDSF of ownership place.
As shown in Figure 9, communicate by newly-increased Sz interface between vANDSF and the hANDSF.It is hANDSF that the UE of roaming selects the ANDSF of ownership place; HANDSF communicates by Sx interface and UE; VANDSF obtains the information such as network condition of other connecting systems in the present networks by the Sy interface.In addition, hANDSF is connected to vANDSF by the Sz interface, and obtains the information such as network condition of visited network by vANDSF.
See also Figure 10, be the embodiment of the invention two method flow diagrams, UE is in the roaming network among the embodiment two, visit hANDSF, therefore the process of embodiment two flow charts and embodiment one flow chart is basic identical, just vANDSF and the position of hANDSF in flow chart change, and produce some variations accordingly.Comprise among Figure 10:
1001, UE carries out the registration that register flow path is accomplished to particular access network;
For example can carry out attachment flow and be registered to 3GPP network, WiMax network etc.
1002, UE carries out dns resolution or DHCP flow process to the address that dns server (DNS Server) or Dynamic Host Configuration Protocol server obtain ANDSF, if write down the address of hANDSF among the UE, does not then need to carry out this dns resolution or DHCP step.
1003, UE is initiated to the register flow path of hANDSF, to hANDSF request service;
This register flow path can be the explicit registration that UE initiates, as sending login request message to hANDSF; Also can be the registration of an implicit expression, send strategy request message or send the measurement report etc. of peripheral network to hANDSF as UE.This hANDSF can set up and safeguard a context, recording-related information for UE.
1004, hANDSF is registered to vANDSF with UE;
HANDSF finds that this UE is a roamer, then the current visited network information that provides according to UE (as the PLMN ID of visited network) is selected the vANDSF on a visit ground for this UE, initiate register flow path to this vANDSF then, this UE is registered to this vANDSF.
This register flow path can be an explicit registration, sends login request message as hANDSF to vANDSF; Also can be the registration of an implicit expression, send strategy request message or send the measurement report etc. of peripheral network to vANDSF as hANDSF.
This vANDSF can set up and safeguard a context, recording-related information for UE.
1005, carrying out network between UE, hANDSF and the vANDSF finds and the relevant treatment of selecting.
In this step, different according to the network discovery with the decision-maker of selecting, specifically can be divided into several situations again.
Processing when 1) making a strategic decision by UE fully
Under this handover decisions method, ANDSF provides policy information and/or network of relation state information to UE, and the information that UE provides according to ANDSF judges whether that needs switch and switch to which purpose network.
Therefore, under embodiment of the invention framework, hANDSF provides policy information and/or network of relation state information (this information can offer hANDSF by vANDSF) to UE, UE can carry out handover decisions according to the information that hANDSF provides, i.e. whether decision needs to switch and switch to which purpose network.
UE be can be divided into this moment again and the situation of strategy request and the situation of network side active distributing policy information initiatively initiated.
UE is being registered to process that ANDSF initiatively initiates (comprise and be registered to vANDSF and hANDSF) strategy request afterwards as shown in figure 11, comprising:
1101, UE sends strategy request message to hANDSF, with acquisition strategy information;
Can comprise UE current position information etc. in this message.
1102, after hANDSF receives this strategy request message, send strategy request message to obtain the situation of network of relation to vANDSF;
In this message that vANDSF sends, the UE current position information can be comprised, also the policy information that hANDSF provides to vANDSF can be comprised.
1103, vANDSF can obtain the state of network of relation according to the policy information that UE current position information and/or hANDSF provide, and sends to hANDSF;
1104, the situation of the network of relation that provides according to policy information and vANDSF of hANDSF provides the policy information of switching to UE;
1105, UE makes a strategic decision according to the policy information that hANDSF sends.
UE can carry out handover decisions according to the information that hANDSF provides, i.e. whether decision needs to switch and switch to which purpose network.
Need to prove that follow-up UE can be again sends strategy request message to hANDSF, to obtain updating strategy information, then the information obtained respectively after the renewal of vANDSF and hANDSF is handled.
UE is being registered to ANDSF (comprise and be registered to vANDSF and hANDSF) afterwards, by one of them ANDSF be vANDSF or hANDSF initiatively send flow process from policy information to UE as shown in figure 12, comprising:
1201, after vANDSF judges that the network of relation situation of current UE changes, the network condition of collecting initiatively can be sent to hANDSF;
1202, the situation of the network of relation that provides according to policy information and vANDSF of hANDSF provides the policy information of switching to UE;
1203, UE makes a strategic decision according to the policy information that hANDSF sends.
UE can carry out handover decisions according to the information that hANDSF provides, i.e. whether decision needs to switch and switch to which purpose network.
Need to prove, the roaming agreement of Radix Angelicae Sinensis possession and roaming place changes or the corresponding strategies information of this UE changes, perhaps the current network of relation situation of vANDSF indication UE changes, then hANDSF can send to UE with updating strategy information (as the available network in this visit ground and select priority etc.) and network condition, finishes follow-up hand-off process by the policy information of UE after according to renewal.
Processing when 2) making a strategic decision by ANDSF fully.
Under this handover decisions method, UE reports the measurement report of peripheral network to ANDSF, and the measurement report that ANDSF reports according to switchover policy and the UE of this UE is for UE carries out handover decisions, and the result of decision sent to UE, UE finishes follow-up hand-off process according to this result.In the case, UE can not need to obtain the policy information that ANDSF sends, and directly receives the result of decision that ANDSF issues and handles.
Under this handover decisions method, because in fact the ANDSF that serves for UE exists two, i.e. therefore vANDSF and hANDSF, can be divided into following three kinds of situations according to the difference of handover decisions point again:
A: finish handover decisions by vANDSF fully
Under this scene, vANDSF is the final decision point that switches.UE reports the measurement report of peripheral network to hANDSF, hANDSF transmits the measurement report of UE and provides this UE to switch required policy information (as the available network in this visit ground and select priority etc.), the state information (as the load condition of current network) of vANDSF collection network of relation to vANDSF.VANDSF for this UE carries out handover decisions, and sends to UE with handover decisions (as switching to which objective network) according to the information of above-mentioned acquisition.
Finish the handover decisions detailed process by vANDSF and see also shown in Figure 13ly, comprising:
1301, UE sends measurement report to hANDSF;
1302, hANDSF transmits measurement report to vANDSF, also can carry the positional information of current UE in this message, and the policy information of operator etc.;
1303, vANDSF collects the situation of network of relation according to the positional information of UE and policy information etc., also can adopt the condition information of the network of relation of preservation, and the measurement report that reports of UE etc. carries out handover decisions, is that UE selects the purpose network that switches, and the result of decision is sent to hANDSF;
1304, hANDSF sends to UE with the result of decision that vANDSF provides, and carries out follow-up hand-off process by UE according to the result of decision.
In addition, the roaming agreement of Radix Angelicae Sinensis possession and roaming place changes or the corresponding strategies information of this UE changes, and then hANDSF can send to updating strategy information (as the available network in this visit ground and select priority etc.) vANDSF.VANDSF is according to the information of above-mentioned acquisition and the corresponding strategies of operator, for this UE carries out handover decisions, and handover decisions (as switching to which objective network) sent to UE.
If in some cases, vANDSF can not finish handover decisions, for example when UE is in the boundary of this visited network and is ready switching to other networks (other visited network or home network), the access network that vANDSF controlled can not satisfy the switching needs of UE, need send to UE this moment for this UE selects the Access Network information of other networks, switches to new network to instruct UE.At this moment, vANDSF can not obtain the information of this purpose network, so vANDSF needs the help of hANDSF, can handle by following dual mode:
A kind of processing mode is, receive the measurement report of UE as hANDSF after, can be according to the situations such as positional information of UE, judge current UE cisco unity malfunction in existing visited network, then according to carrier policy, select the available access network resource information of other networks of current location (other visited network or home network), and can provide the situation of relevant Access Network by the vANDSF of these Access Network place networks, load condition for example, the situation with these policy informations and Access Network sends to vANDSF then.VANDSF carries out handover decisions after receiving these information, selects the objective network of a switching for UE.
Another processing mode is, receive the measurement report of hANDSF transmission as vANDSF after, judge in the time of to finish handover decisions, send strategy request message to hANDSF, require hANDSF that the access network resource of other networks of current UE present position (being different from other visited network or the home network of current visited network) is provided; The position that hANDSF is current according to UE, according to carrier policy, select the available access network resource information of other networks of current location, and can provide the situation of relevant Access Network by the vANDSF of these Access Network place networks, load condition for example, and the situation of these policy informations and Access Network is sent to the vANDSF of the request of initiation.VANDSF carries out handover decisions after receiving these information, selects the objective network of a switching for UE.In addition, if UE need move back to home network, then hANDSF can directly obtain the Access Network situation of present networks, and does not need to obtain relevant information by new vANDSF.
B: finish handover decisions by hANDSF fully
Under this scene, hANDSF is final handover decisions point, and hANDSF receives the measurement report that UE reports, and requires the vANDSF network state that visited network is relevant to report to hANDSF.
Finish the handover decisions detailed process by hANDSF and see also shown in Figure 14ly, comprising:
1401, UE sends measurement report to hANDSF;
1402, hANDSF requires vANDSF that the policy information of this UE network of relation is provided to the vANDSF strategy request;
1403, the vANDSF situation of collecting network of relation according to the positional information of UE and policy information etc. also can adopt the condition information of the network of relation of preservation, and network condition is offered hANDSF by policy response message;
1404, the hANDSF measurement report that can report according to UE, that vANDSF provides or be kept at the state information of the network of relation among the hANDSF and carrier policy etc. and carry out handover decisions, select the purpose network of switching for UE, and the result of decision comprised send to UE, carry out follow-up hand-off process by UE according to the result of decision.
Need to prove that if hANDSF adopts the network information of storage, then step 1402 and step 1403 do not need.
In addition, after hANDSF receives the message that UE sends in the step 1401, when the network of judging the vANDSF place of registration before this UE can not provide the purpose network information for this UE, can select the vANDSF of other networks (other visited network or home network) according to the UE current position information for this UE, and to this vANDSF transmission strategy request (as step 1402), the information of relevant access network is obtained in requirement, the situation that should the new vANDSF that selects collect network of relation according to the positional information of UE and policy information etc. this moment, and by sending to hANDSF (as step 1403).When UE need return the genus network, hANDSF also can directly obtain other Access Network information status of home network, and finishes decision-making.
C: transfer hANDSF to by vANDSF and finish handover decisions
When carrying out handover decisions, under some particular case, may change and carry out handover decisions by hANDSF by vANDSF.When vANDSF can't carry out handover decisions for UE, require hANDSF to carry out handover decisions, the handover decisions point changes hANDSF into, after hANDSF carries out handover decisions, the result of decision is sent to UE by vANDSF.
Transfer hANDSF to by vANDSF and finish the handover decisions detailed process and see also shown in Figure 15ly, comprising:
1501, UE sends measurement report to vANDSF;
1502, hANDSF transmits measurement report to vANDSF, also can carry the positional information of current UE in this message, and the policy information of operator etc.;
1503, vANDSF can't carry out handover decisions for UE, then sends handoff request message to hANDSF, requires hANDSF to carry out handover decisions, can carry the measurement report that UE provides in this handoff request message;
1504, hANDSF sends the result of decision to UE;
HANDSF is according to the UE current position information, according to carrier policy, select the available access network resource information of other networks of current location (other access networks or home network), and can provide the situation of relevant Access Network by the vANDSF of these Access Network place networks, load condition for example according to the measurement report that UE provides, is that this UE carries out handover decisions, and the result of handover decisions sent to UE, carry out follow-up handover operation by UE according to this result.
3) make a strategic decision jointly by UE and ANDSF
This processing method and the flow process of being made a strategic decision by ANDSF fully are similar substantially, and difference is that before the UE reporting measurement reports, ANDSF needs to send policy information to UE earlier, and UE is according to this policy information reporting measurement reports then.ANDSF described here can be vANDSF, also can be hANDSF.ANDSF generally can provide policy information to UE in the registration process for the first time at UE, perhaps initiatively provides to UE after policy information changes.
ANDSF generally can comprise to the policy information that UE provides: the Access Network of appointment, the thresholding that reports or frequency etc.UE monitors specified network according to these information, when related data reaches when reporting thresholding, reports the measurement report of specified network to ANDSF.As for the decision-making treatment of ANDSF be consistent by the processing procedure under the ANDSF decision-making fully, repeat no more herein.
In the embodiment of the invention two, UE only need visit hANDSF, just can obtain by utilizing newly-increased interface to carry out the network condition information that obtains after the information interaction between hANDSF and vANDSF by this hANDSF, thereby carry out respective handling, perhaps get access to by utilizing newly-increased interface to carry out the objective network information of selecting according to interaction results after the information interaction between hANDSF and vANDSF, thereby can simpler realization network find and select to handle.
Seeing also Figure 16, is the embodiment of the invention three network architecture schematic diagrames.Embodiment three and embodiment one, the main distinction of implementing two network configuration are to implement between the vANDSF and hANDSF new interface not to be set in three, but utilize the interface between PCRF.
Propose in the prior art ANDSF can and PCC (Policy Control and Charging, policy control and charging) there is interface in PCRF functional entity in the framework, and can connect by the S9 interface between the hPCRF of the vPCRF of roaming place and ownership place in the PCC framework, therefore utilize this interface also can realize vANDSF and hANDSF information interaction, UE can select the ANDSF of current network, this ANDSF obtains the policy information and the network condition information of network by vPCRF and hPCRF, thereby finishes handover decisions.ANDSF can obtain the policy information (as business game of carrier policy, UE etc.) of current UE from PCRF, also can utilize the interface of PCRF to obtain relevant information from another ANDSF.
As shown in figure 16, directly not mutual between vANDSF and the hANDSF, UE always selects to visit the vANDSF on ground, and obtains the policy information of UE to hPCRF by vPCRF.When if the strategy among the hPCRF is not enough to support handover decisions, hPCRF also may obtain relevant policy information to the hANDSF of ownership place.Need to prove that it is the example explanation that Figure 16 just selects vANDSF with UE, UE also can select hANDSF, and is connected to vANDSF by the interface between hPCRF and the vPCRF.
Seeing also Figure 17, is the embodiment of the invention three method flow charts, comprising:
1701, UE carries out the registration that register flow path is accomplished to particular access network;
For example can carry out attachment flow and be registered to 3GPP network, WiMax network etc.
1702, UE carries out dns resolution or DHCP flow process to the address that dns server (DNS Server) or Dynamic Host Configuration Protocol server obtain ANDSF, and dns server or Dynamic Host Configuration Protocol server return to UE with the address of the ANDSF of configuration;
If write down the address of required ANDSF among the UE, then do not need to carry out this dns resolution or DHCP step.
1703, UE is initiated to the register flow path of vANDSF, to vANDSF request service;
This register flow path can be the explicit registration that UE initiates, as sending login request message to ANDSF; Also can be the registration of an implicit expression, send strategy request message or send the measurement report etc. of peripheral network to vANDSF as UE.
This vANDSF can set up and safeguard a context for UE.
1704, vANDSF is registered to hANDSF by vPCRF and hPCRF with UE;
1705, carrying out network between UE, hANDSF, vANDSF, vPCRF and the hPCRF finds and the relevant treatment of selecting.
This step also can be found to comprise three kinds of situations with trade-off decision main body different according to network among this embodiment: promptly fully by UE make a strategic decision, complete by ANDSF make a strategic decision, the processing mode of UE and ANDSF Shared Decision Making.
The situation of making a strategic decision with UE illustrates, and after step 1704 was finished, vANDSF can find hPCRF according to the home network information of this UE to vPCRF request strategy information PCRF, and transmits the strategy request that vANDSF sends.If hPCRF is the policy information of this UE not, then send strategy request to hANDSF, require hANDSF that relevant information is provided.The policy information that hANDSF can be provided with ownership place according to the UE current position information (as available network in this visit ground and selection priority etc.) sends to hPCRF, then hPCRF will send to vPCRF by policy response message from the information that hANDSF obtains, and and then be transmitted to vANDSF, by vANDSF policy information is sent to UE again, whether need to switch by the UE decision.
For more detailed be that the scheme principle among the embodiment that introduces with the front is similar for example and the situation of other modes, difference is that mainly ANDSF does not participate in the processing of network selecting and discovery directly, the participation of intermediate demand vPCRF and hPCRF.But the final decision function generally is to be handled by ANDSF.Certainly, also can be handled by PCRF, its principle is similar.Therefore, no longer describe in detail herein.
In the embodiment of the invention three, UE only need visit vANDSF, just can obtain by utilizing existing P CRF interface to carry out the network condition information that obtains after the information interaction between vANDSF and hANDSF by this vANDSF, thereby carry out respective handling, perhaps get access to by utilizing existing P CRF interface to carry out the objective network information of selecting according to interaction results after the information interaction between vANDSF and hANDSF, thereby can simpler realization network find and select to handle.Foregoing describes embodiment of the invention network in detail and finds and the method for selecting that corresponding, the embodiment of the invention provides a kind of network system and device.
Seeing also Figure 18, is that embodiment of the invention network system is unified structural representation.
As shown in figure 18, network system comprises: first access network discovery and selection functional entity ANDSF1801, second access network discovery and selection functional entity ANDSF 1802.
First access network discovery and selection functional entity ANDSF 1801, be used for behind accessing user terminal to network, by with the network condition information of obtaining alternately of the 2nd ANDSF 1802, described network condition information being sent to described user terminal carry out the objective network selection, is described user terminal selecting objective network according to described network condition information perhaps.
The 2nd ANDSF 1802 is used for carrying out information interaction with a described ANDSF 1801.
A described ANDSF 1801 obtains network condition information alternately by newly-increased signaling interface and described the 2nd ANDSF1802.
A described ANDSF 1801 is the vANDSF on visit ground, and described the 2nd ANDSF 1802 is the hANDSF of ownership place; Perhaps, a described ANDSF 1801 is the hANDSF of ownership place, and described the 2nd ANDSF 1802 is the vANDSF on visit ground.
Seeing also Figure 19, is embodiment of the invention network system two structural representations.
As shown in figure 19, network system comprises: first access network discovery and selection functional entity ANDSF1901, second access network discovery and selection functional entity ANDSF 1902, ownership place policy charging rule functional entity hPCRF 1903, visit ground policy charging rule functional entity vPCRF 1904.
First access network discovery and selection functional entity ANDSF 1901, be used for behind accessing user terminal to network, by with the network condition information of obtaining alternately of the 2nd ANDSF 1902, described network condition information being sent to described user terminal carry out the objective network selection, is described user terminal selecting objective network according to described network condition information perhaps.
The 2nd ANDSF 1902 is used for carrying out information interaction with a described ANDSF 1901.
A described ANDSF 1901 obtains network condition information alternately by interface and described the 2nd ANDSF 1902 between ownership place policy charging rule functional entity hPCRF1903 and the visit ground policy charging rule functional entity vPCRF 1904.
A described ANDSF 1901 is the vANDSF on visit ground, and described the 2nd ANDSF 1902 is the hANDSF of ownership place; Perhaps, a described ANDSF 1901 is the hANDSF of ownership place, and described the 2nd ANDSF 1902 is the vANDSF on visit ground.ANDSF specifically is connected to PCRF's: vANDSF links to each other with vPCRF 1904, and hANDSF links to each other with hPCRF 1903, and an ANDSF 1901 links to each other with hPCRF 1903 and just illustrates among Figure 19.
Seeing also Figure 20, is embodiment of the invention apparatus structure schematic diagram.
As shown in figure 20, device comprises: interactive unit 2002, processing unit 2003.Device described here is meant access network discovery and selection functional entity ANDSF.
Described interactive unit 2002 is to obtain network condition information alternately by newly-increased interface and access network discovery and the selection functional entity ANDSF outside the described local terminal network; Perhaps, described interactive unit 2002 is to obtain network condition information alternately by interface between ownership place policy charging rule functional entity hPCRF and the visit ground policy charging rule functional entity vPCRF and access network discovery and the selection functional entity ANDSF outside the described local terminal network.
Described device further comprises: judgment processing unit 2004.
Described device further comprises: indicating member 2005.
Indicating member 2005 is used for sending policy information to described user terminal, indicates described user terminal according to described policy information reporting measurement reports.
In sum, technique scheme as can be seen, in the embodiment of the invention technical scheme behind accessing user terminal to network, by between different access network discoveries and selection functional entity ANDSF by obtaining network condition information alternately, therefore user terminal only need be visited one of them ANDSF, just can obtain network side and carry out the network condition information that obtains after the information interaction by this ANDSF, thereby carry out respective handling, perhaps get access to network side and carry out the objective network information selected according to interaction results after the information interaction, thereby can simpler realization network find and select to handle.
Further, in the embodiment of the invention technical scheme, a described ANDSF can obtain network condition information alternately by newly-increased interface and described the 2nd ANDSF; Perhaps, a described ANDSF can obtain network condition information alternately by interface and described the 2nd ANDSF between ownership place policy charging rule functional entity hPCRF and the visit ground policy charging rule functional entity vPCRF.
Further, embodiment of the invention technical scheme can be the vANDSF on user terminal access visit ground, also can be the hANDSF of visit ownership place.
More than a kind of network discovery and system of selection, network system and device that the embodiment of the invention provided are described in detail, for one of ordinary skill in the art, thought according to the embodiment of the invention, part in specific embodiments and applications all can change, in sum, this description should not be construed as limitation of the present invention.
Claims (17)
1, a kind of network is found and system of selection, it is characterized in that, comprising:
Behind accessing user terminal to network,
First access network discovery and selection functional entity ANDSF by with the network condition information of obtaining alternately of the 2nd ANDSF;
A described ANDSF sends to described user terminal with described network condition information and carries out the objective network selection, is described user terminal selecting objective network according to described network condition information perhaps.
2, network according to claim 1 is found and system of selection, it is characterized in that:
A described ANDSF is specially by the network condition information of obtaining alternately with described the 2nd ANDSF:
A described ANDSF obtains network condition information alternately by newly-increased interface and described the 2nd ANDSF; Perhaps,
A described ANDSF obtains network condition information alternately by interface and described the 2nd ANDSF between ownership place policy charging rule functional entity hPCRF and the visit ground policy charging rule functional entity vPCRF.
3, network according to claim 2 is found and system of selection, it is characterized in that:
A described ANDSF further comprises by the network condition information of obtaining alternately with the 2nd ANDSF before:
A described ANDSF receives the registration message of user terminal and registers, and described registration message directly sent or send to the 2nd ANDSF by vPCRF and hPCRF registers.
4, find and system of selection according to each described network of claim 1 to 3, it is characterized in that:
A described ANDSF is the vANDSF on visit ground, and described the 2nd ANDSF is the hANDSF of ownership place, and a described ANDSF is specially by the network condition information of obtaining alternately with described the 2nd ANDSF:
Described vANDSF sends request to described hANDSF after receiving the measurement report that described user terminal sends, and described measurement report is initiatively sent by described user terminal or sends according to described policy information after receiving the policy information that described vANDSF issues;
Receive the policy information that described hANDSF returns according to described request;
Policy information collection network condition information according to described reception.
5, find and system of selection according to each described network of claim 1 to 3, it is characterized in that:
A described ANDSF is vANDSF, and described the 2nd ANDSF is hANDSF, and a described ANDSF is specially by the network condition information of obtaining alternately with described the 2nd ANDSF:
Described vANDSF receives the policy information that hANDSF sends, described policy information is to obtain after described hANDSF receives the measurement report that described user terminal sends, and described measurement report is initiatively sent by described user terminal or sends according to described policy information after receiving the policy information that described vANDSF issues;
Policy information collection network condition information according to described reception.
6, find and system of selection according to each described network of claim 1 to 3, it is characterized in that:
A described ANDSF is hANDSF, and described the 2nd ANDSF is vANDSF, and a described ANDSF is specially by the network condition information of obtaining alternately with described the 2nd ANDSF:
Described hANDSF receives the network condition information that vANDSF sends, and described network condition information is that described vANDSF receives to collect behind the measurement report that described user terminal sends and obtains,
Described measurement report is initiatively sent by described user terminal or sends according to described policy information behind the policy information that the described hANDSF of reception issues.
7, find and system of selection according to each described network of claim 1 to 3, it is characterized in that:
A described ANDSF is hANDSF, and described the 2nd ANDSF is vANDSF, and a described ANDSF is specially by the network condition information of obtaining alternately with described the 2nd ANDSF:
Described hANDSF sends request to described vANDSF after receiving the measurement report that described user terminal sends, and described measurement report is initiatively sent by described user terminal or sends according to described policy information after receiving the policy information that described hANDSF issues;
Receive the network condition information that described vANDSF returns according to described request.
8, find and system of selection according to each described network of claim 1 to 3, it is characterized in that:
A described ANDSF is hANDSF, and described the 2nd ANDSF is vANDSF,
A described ANDSF is specially by the network condition information of obtaining alternately with described the 2nd ANDSF:
Described hANDSF receives the handoff request of described vANDSF, and described handoff request is that described vANDSF receives that judge behind the measurement report that described user terminal sends can't be for sending behind the described user terminal selecting objective network;
After described hANDSF receives described handoff request, the collection network condition information.
9, find and system of selection according to each described network of claim 1 to 3, it is characterized in that:
A described ANDSF further comprises by the network condition information of obtaining alternately with described the 2nd ANDSF before:
Receive the strategy request message that described user terminal sends;
Accordingly, a described ANDSF sends to described user terminal with described network condition information and carries out objective network and select.
10, a kind of network system is characterized in that, comprising:
First access network discovery and selection functional entity ANDSF, be used for behind accessing user terminal to network, by with the network condition information of obtaining alternately of the 2nd ANDSF, described network condition information being sent to described user terminal carry out the objective network selection, is described user terminal selecting objective network according to described network condition information perhaps;
The 2nd ANDSF is used for carrying out information interaction with a described ANDSF.
11, network system according to claim 10 is characterized in that:
A described ANDSF obtains network condition information alternately by newly-increased signaling interface and described the 2nd ANDSF.
12, network system according to claim 10 is characterized in that:
Described network system further comprises ownership place policy charging rule functional entity hPCRF and visit ground policy charging rule functional entity vPCRF;
A described ANDSF obtains network condition information alternately by interface and described the 2nd ANDSF between ownership place policy charging rule functional entity hPCRF and the visit ground policy charging rule functional entity vPCRF.
13, according to each described network system of claim 10 to 12, it is characterized in that:
A described ANDSF is the vANDSF on visit ground, and described the 2nd ANDSF is the hANDSF of ownership place; Perhaps,
A described ANDSF is the hANDSF of ownership place, and described the 2nd ANDSF is the vANDSF on visit ground.
14, a kind of device is characterized in that, comprising:
Interactive unit is used for behind accessing user terminal to network, by with outer access network discovery of local terminal network and the network condition information of obtaining alternately of selection functional entity ANDSF;
Processing unit is used for that described network condition information is sent to described user terminal and carries out the objective network selection, is described user terminal selecting objective network according to described network condition information perhaps.
15, device according to claim 14 is characterized in that:
Described interactive unit is to obtain network condition information alternately by newly-increased interface and access network discovery and the selection functional entity ANDSF outside the described local terminal network; Perhaps,
Described interactive unit is to obtain network condition information alternately by interface between ownership place policy charging rule functional entity hPCRF and the visit ground policy charging rule functional entity vPCRF and access network discovery and the selection functional entity ANDSF outside the described local terminal network.
16, according to claim 14 or 15 described devices, it is characterized in that described device further comprises:
The judgment processing unit, be used to receive and judge behind the measurement report that described user terminal sends can't be for described user terminal selecting objective network the time, access network discovery outside described local terminal network and selection functional entity ANDSF send message, and asking described ANDSF is described user terminal selecting objective network.
17, device according to claim 16 is characterized in that, described device further comprises:
Indicating member is used for sending policy information to described user terminal, indicates described user terminal according to described policy information reporting measurement reports.
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| PCT/CN2009/070741 WO2009115015A1 (en) | 2008-03-18 | 2009-03-11 | A discovery and selection method for network, network system and communication device |
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| CN200810084022A CN101541064A (en) | 2008-03-18 | 2008-03-18 | Network discovery and selection method, network system and device |
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