CN101001447A - Switching or network selecting method of multi-mode terminal network - Google Patents
Switching or network selecting method of multi-mode terminal network Download PDFInfo
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Abstract
This invention discloses a method for network switch and selection of multi-mode terminal, in which, a multi-mode terminal increases a step of negotiating control point with the network side before network switch or selection, and the negotiation can be started up by the terminal or the network side and the negotiation information carries with information of the control point suggested by the local terminal and the position of a final control point is decided by the terminal or the network side, if the negotiation is not agreed, then a default control point set in advance is used. The multi-mode terminal gets the MIH ability information by beep of access nets or broadcast channels or by accessing the information server of the network side and takes it as the base for deciding suggesting control points.
Description
Technical field
The present invention relates to mobile communication technology, particularly the mobile communication technology of multiple access net.
Background technology
The communication technology, especially mobile communication technology develop rapidly in recent years.Along with first to the releasing one after another of 3G (Third Generation) Moblie (The Third Generation, be called for short " 3G ") system, mobile communication increases day by day to the influence of human lives and work.Along with increasing of user, really satisfy market and user's request, fixed network and mobile network's evolution and asymptotic fusion, soft switchcall server must possess the characteristic of mobile, multimedia and multiple access under open architectural framework.
Insert the implication that variation comprises access medium, inserts User Agreement and two aspects of type.From access medium, except traditional copper cable access way, also has multiple other access way, as the various Digital Subscriber Line in the fixed access network (being called for short " xDSL "), optical fibre-coaxial cable mixture (HybridFiber Coax, be called for short " HFC ") line, power line etc., the 802.11a/b in the wireless access network, bluetooth, fixed wireless, satellite, move etc.; From inserting User Agreement and type, have from based on H.323, internetworking agreement (Internet Protocol, be called for short " IP ") telephone terminal and integrated access equipment (Integrated Access Device, be called for short " IAD ") terminal, to traditional global system for mobile communications (Global System for mobile Communication, be called for short " GSM ") or code division multiple access (CodeDivision Multiple Access, be called for short " CDMA ") mobile subscriber, and the Wideband Code Division Multiple Access (WCDMA) of 3G (Wideband Code Division Multiple Access is called for short " WCDMA "), CDMA2000 user etc.
The variation that inserts makes that soft switchcall server can compatible traditional network insertion, fully guarantees the investment of operator's existing equipment; The opening of its access simultaneously guarantees fully that also soft switchcall server can incorporate more multiple terminals access style, thereby guarantees terminal, the more introducing of intelligent terminal of more cost performances, has fully guaranteed the ultimate interest of user, Incumbent and startup carrier.
Simultaneously, owing to include many different branching networks in the network of large-scale Virtual network operator in the world, and take different radio bands.Operator also wishes for various clients provide seamless, efficient service, thereby obtain advantage in competition when wishing profit maximization.At present, bring into schedule, and to the enforcement of 3G transition scheme, operator faces the challenge of great number of issues along with 3G builds, such as: the integration of multiple standards, numerous hybrid networks and transition etc.For operator, the base station of multi-mode, multiband and portable terminal seem extremely important.
But, in the 3G network all-round construction with before covering, the user can not only be confined in the 3G network, but when enjoyment 3G provides service, also need be in the place outside the 3G service network, the sound that 2G or 2.5G network can provide before continuing to enjoy transmits service and data, services.This also makes multimode phone and portable terminal should have the ability that in 2G, 2.5G and 3G network seamless link and roaming are switched.
In order to solve the roaming switching problem of user between each communication system, (the Institute of Electrical and Electronics Engineers of Institute of Electrical and Electronics Engineers, abbreviation " IEEE ") 802 wireless working groups have set up IEEE 802 switching seminar---Handoff ECSG, and definite designation afterwards is IEEE 802.21 working groups.This working group is responsible for working out public switching framework and is used for wired and wireless IEEE 802 standards, as IEEE 802.3/11/16/15 and third generation partner program (3rdGeneration Partnership Project, be called for short " 3GPP "), second group of (Third Generation Partnership Project II of third generation partner program, be called for short " 3GPP2 ") system etc., standard between these different systems, carry out the requirement and the corresponding handover mechanism of soft handover and direct-cut operation, this media-independent switches (Media Independent Handover is called for short " MIH "), and system configuration as shown in Figure 1.
MIH generalized reference model as shown in Figure 2, specifically, IEEE802.21 is exactly by using media-independent functional entity (Media Independent Handover Function, be called for short " MIHF "), physical layer (Physical Layer) and media interviews control (Media AccessControl to multiple Access Network, be called for short " MAC ") shield, and the relevant information of collecting these physical layers and MAC, provide unified interface to the upper strata then, make that the difference of different Access Networks is fully transparent to the upper strata.MIHF can be used for network side and end side.Support that the terminal of MIH function should be a multimode, and can insert multiple radio open simultaneously.
MIHF has defined extra MAC service access point (the ServiceAccess Point at every kind of specific access technology, abbreviation " SAP ") with relevant primitive, help to gather link layer information, as logic link control (Logical Link Control, be called for short " LLC ") information and control link behavior when switching, for switch decision, network selecting, the service selection on upper strata plays auxiliary and impetus.SAPs and the relevant primitive that inserts MIHF that one group media of its definition is irrelevant comprise:
The media-independent Event Service comprises incident and trigger that local and remote interface produces;
The media-independent command service is used for user's control of giving an order and switches relevant link behavior;
The media-independent service provides information model and information bank so that formulate handover decisions effectively.
MIHF uses message that media-independent Event Service, media-independent command service and media-independent service are provided, carry out message by SAPs with other layer and function plane, MIH SAP relation as shown in Figure 3, wherein, each SAP specifies the primitive of exchange message and the form of exchange message to be formed by one group.
The communication terminal of current majority only inserts a kind of communication system.At this moment, the control to communication process is generally determined by network side.
But,, may just need decide by multimode terminal to the control of some communication process if multimode terminal inserts a plurality of communication systems.For example when the communication system that relates to switching between a plurality of communication systems, has a MIH is carried out network selecting and service selection, may just need control by multimode terminal.Because by the mode of multimode terminal control, can reduce the influence that the difference operation strategy of operator causes.
If multimode terminal inserts the different communication systems of same operator, at this moment then in that being set between a plurality of Access Networks, the unified equipment of handling controls switching and selection between a plurality of systems by operator.
In actual applications, there is following problem in such scheme: when network switching or network selecting, possibly can't carry out this processing.
Cause the main cause of this situation to be, owing in the standard of IEEE 802.21, stipulated between a plurality of networks to switch and during network selecting, can control by network or terminal, but lack negotiation mechanism between the two, so in network and control power terminal conflict, can't clear and definite control point, make this processing normally to carry out.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of multimode terminal network to switch or network selecting method, makes when network switching or network selecting, can obtain optimal control point.
For achieving the above object, the invention provides a kind of multimode terminal network and switch or network selecting method, comprise following steps:
Multimode terminal carries out the control point with network side and consults before initiating network switching or network selecting;
The network of finishing described multimode terminal under the control at the control point of consulting to determine switches or network selecting.
Wherein, in the negotiations process of described control point, each sends the information of once advising the control point at least to the opposite end described multimode terminal and network side.
In this external described method, described multimode terminal obtains the media-independent switching capability information of each Access Network in the following manner, and according to the control point that these ability information and network side are advised, determines the control point of this multimode terminal to the network side suggestion:
The media-independent switching capability information that paging or broadcast channel by each Access Network obtains each Access Network, perhaps,
Obtain the media-independent switching capability information of each Access Network by the information server of accesses network side.
In this external described method, described network side obtains the media-independent switching capability information of each Access Network by the visit information server, and according to the control point of these ability information and described multimode terminal suggestion, the decision network side is to the control point of this multimode terminal suggestion.
In this external described method, by the position at described multimode terminal final decision control point.
In this external described method, by the position at described network side final decision control point.
In this external described method, initiate the control point by described multimode terminal and consult.
In this external described method, initiate the control point by described network side and consult.
In this external described method, the relevant information specific messages transmission through consultation that consult at described control point, perhaps,
The relevant information that consult at described control point is attached in switching initialization request message and response message thereof and is transmitted.
In this external described method, at described multimode terminal and network side default control point is set in advance, if described multimode terminal and network side then use this default control point about the negotiation failure at control point.
By finding that relatively the main distinction of technical scheme of the present invention and prior art is that multimode terminal has increased the step of consulting the control point with network side before network switching or network selecting.Negotiation can be initiated by one of multimode terminal or network side, carries the information at the control point of local terminal suggestion in the negotiation message, by the position at one of multimode terminal or network side final decision control point.If fail to consultations, then use the default control point that sets in advance.The MIH ability information that paging or the broadcast channel of multimode terminal by each Access Network obtains each Access Network, perhaps obtain the MIH ability information of each Access Network, and these ability information are advised one of the foundation at control point as decision by the information server of accesses network side.
Difference on this technical scheme has brought comparatively significantly beneficial effect, and promptly network side and multimode terminal can consult to select suitable control point according to situations such as current network situation, user's request, types of service.By selecting suitable control point, can more effectively select best network for multimode terminal, can avoid the situation of network and multimode terminal control point conflict effectively.
By default control point is set, multimode terminal and network side also can be reached unification with regard to the control point when making the negotiation failure.
The control point of multimode terminal by obtaining each Access Network MIH ability information and determining in view of the above to advise, the feasible control point of being advised and the practical capacity of each current available Access Network are complementary.
Description of drawings
Fig. 1 is a MIH system configuration schematic diagram in the prior art;
Fig. 2 is a MIH generalized reference model schematic diagram in the prior art;
Fig. 3 is that the MIH SAP of IEEE802.21 draft definition in the prior art concerns schematic diagram;
Fig. 4 is switching of multimode terminal network or the network selecting method according to first embodiment of the invention;
Fig. 5 is switching of multimode terminal network or the network selecting method according to second embodiment of the invention;
Fig. 6 is switching of multimode terminal network or the network selecting method according to third embodiment of the invention;
Fig. 7 is switching of multimode terminal network or the network selecting method according to four embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
The present invention selects optimum controlling point by carrying out the control point negotiation method between multimode terminal and network, and the network that carries out multimode terminal switches and selection.And under the situation of consulting failure, the control at the default control point that foundation is provided with is finished the network switching and is selected.
The multimode terminal network of first embodiment of the invention switch or network selecting method as shown in Figure 4, and regulation final decision control point is a multimode terminal in agreement, default control point is a multimode terminal.By default control point is set, multimode terminal and network side also can be reached unification with regard to the control point when making the negotiation failure.
In step 401, multimode terminal is before initiating the network switching and selecting, the MIH ability information that paging or broadcast channel by each Access Network obtains each Access Network, and the suggestion control point of deciding network to switch and selecting according to these information, such control point of advising can be complementary with the practical capacity of each current available Access Network.Send the switching initialization request message to network side then, this message comprises suggestion control point information, for example advises that the control point is a multimode terminal.
In step 402, after network side is received this request message, inquire about the MIH ability information of each Access Network to information server.
In step 403, information server returns the MIH ability information of each Access Network of being inquired about, and network side is according to the control point of these ability information and multimode terminal suggestion, and decision for example advises that to the control point of this multimode terminal suggestion the control point also is multimode terminal.
In step 404, network side is to the initialization request message response of multimode terminal, and the control point information (SuggestedControlPoint) of being advised is included in the response message, and is specific as follows:
MIH_Handover_Initiate.response (response of MIH switching initialization)
(
HandoverAck (initialization is switched or abandoned switching),
PreferredLinkIdentifier (preferred network sign, with the network of request suggestion can be different),
PreferedPoAIdentifier (preferred PoA sign, the PoA that advises with request can be different),
AbortReason (reason of abandoning switching),
SuggestedControlPoint (control point of suggestion can be dual-mode terminal or network side).
)
In step 405, according to the agreement regulation, multimode terminal is the final decision control point, therefore, multimode terminal is taken all factors into consideration the MIH ability information of each Access Network according to the suggestion control point of the network side of receiving and the objective network information of switching, and the position at final decision control point is a multimode terminal.And the suggestion control point information that determined of informing network side.
In step 406, according to the result who consults, multimode terminal is the control point that network switches and selects.By the selected objective network of multimode terminal grid of reference side, decide the objective network that carries out MIH, switch according to the objective network that is determined again.
The multimode terminal network of second embodiment of the invention switch or network selecting method as shown in Figure 5, for example in agreement clearly regulation final decision control point be set to network side, default control point is a network side.
In step 501, before network switches and selects, by network side visit information server, the MIH ability information of each Access Network of application inquiry.
In step 502, information server returns institute's information inquiring.
In step 503, network side is according to the MIH ability information of each Access Network of receiving, and decision is a network side to the control point of this multimode terminal suggestion.And, in this message, comprise suggestion control point information to multimode terminal initiation switching initialization request message, initiate the control point and consult, specific as follows:
MIH_Handover_Initiate.request (request of MIH switching initialization)
(
SuggestedNewLinkIdentifier (suggestion is switched needs initialized network identity),
SuggestedNewPoAIdentifier (suggestion is switched needs initialized PoA sign),
HandoverMode (switch mode, for example elder generation disconnects afterwards switching or switching afterwards earlier and disconnects);
CurrentLinkAction (switch the back old link with the state that enters, for example chain rupture, dormancy, close, maintenance etc.),
SuggestedControlPoin (control point of suggestion can be dual-mode terminal or network side).
)
In step 504, the MIH ability information that paging or the broadcast channel of multimode terminal by each Access Network obtains each Access Network, and according to suggestion control point and objective network information from network side, the position at decision suggestion control point, for example also be network side, consistent with the suggestion of network side.
According to agreement, multimode terminal is the final decision control point.Multimode terminal is according to consensus result, and the suggestion control point of final decision is a network side, and the objective network information of this result and selection is attached in the switching initialization response message that network side sends.
In step 505, as the control point that this network switches and selects,, decide the objective network of this switching by network side with reference to the objective network information of multimode terminal, initiate to switch.The objective network that multimode terminal is selected according to network side carries out MIH and switches.
The multimode terminal network of third embodiment of the invention switch or network selecting method as shown in Figure 6, and regulation final decision control point is a multimode terminal in agreement, default control point is a network side.
In step 601, before network switched and selects, multimode terminal was inquired about the MIH ability of each Access Network to the information server of network.
In step 602, information server returns the MIH ability information of each Access Network.
In step 603, multimode terminal sends the switching initialization request message according to the information of receiving to network side, and has comprised the control point information of suggestion, for example is network side.The control point of being advised also can be complementary with the practical capacity of each current available Access Network like this.
Step 604 is similar to step 402.
In step 605, information server returns the MIH ability information of each Access Network of being inquired about.According to agreement, network side is the final decision control point.Therefore, network side is according to the control point of these ability information and multimode terminal suggestion, and final decision for example advises that to the control point of this multimode terminal suggestion the control point is a multimode terminal.
In step 606, network side returns initialization response message to multimode terminal, and the suggestion control point and the selected objective network information of final decision is comprised wherein.
Step 607 also is similar to step 406, does not give unnecessary details at this.
The multimode terminal network of four embodiment of the invention switch or network selecting method as shown in Figure 7, and regulation final decision control point is a network side in agreement, default control point is a multimode terminal.
Step 701 and step 703 are similar to step 501 and step 503.
In step 704, multimode terminal is received the switching initialization request message of network side, and the suggestion control point that wherein comprises network side is the information of multimode terminal, inquires about the MIH ability information of each Access Network then to the information server application of network.
In step 705, information server returns the MIH ability information of each Access Network.According to the suggestion control point of these ability information and network side, the information such as objective network of suggestion, deciding the position at suggestion control point by multimode terminal, for example is network side.
In step 706, multimode terminal sends the switching initialization response message to network side, wherein comprises this suggestion control point and objective network information.
In step 707, according to agreement, network side is the final decision control point.Network side is according to the MIH ability information of each Access Network and the control point information of the multimode terminal suggestion of receiving, the final decision control point is a network side, and should advise that control point information sent to multimode terminal.
Step 708 is similar to step 505 equally, repeats no more herein.
Each above-mentioned multimode terminal network switches or network selecting method, and network side and multimode terminal can consult to select suitable control point according to situations such as current network situation, user's request, types of service.By selecting suitable control point, can more effectively select best network for multimode terminal, can avoid the situation of network and multimode terminal control point conflict effectively.
In the respective embodiments described above, if consult failure, then come the switching and the selection of Control Network by the default control point of agreement regulation.In addition, in the respective embodiments described above, the relevant information that consult at the control point is attached in switching initialization request message and response message thereof and is transmitted, those of ordinary skills understand easily, also can adopt specific messages to transmit these information, for example, negotiation message can adopt to give a definition:
MIH_ControlPointNegotiation (negotiation message definition)
{
ControlPoint (control point of suggestion),
NegotiationInformation (negotiation supplementary)
}
Though pass through with reference to some of the preferred embodiment of the invention, the present invention is illustrated and describes, but those of ordinary skill in the art should be understood that and can do various changes to it in the form and details, and without departing from the spirit and scope of the present invention.
Claims (10)
1. a multimode terminal network switches or network selecting method, it is characterized in that, comprises following steps:
Multimode terminal carries out the control point with network side and consults before initiating network switching or network selecting;
The network of finishing described multimode terminal under the control at the control point of consulting to determine switches or network selecting.
2. multimode terminal network according to claim 1 switches or network selecting method, it is characterized in that, in the negotiations process of described control point, each sends the information of once advising the control point at least to the opposite end described multimode terminal and network side.
3. multimode terminal network according to claim 2 switches or network selecting method, it is characterized in that, described multimode terminal obtains the media-independent switching capability information of each Access Network in the following manner, and, determine the control point of this multimode terminal to the network side suggestion according to the control point that these ability information and network side are advised:
The media-independent switching capability information that paging or broadcast channel by each Access Network obtains each Access Network, perhaps,
Obtain the media-independent switching capability information of each Access Network by the information server of accesses network side.
4. multimode terminal network according to claim 2 switches or network selecting method, it is characterized in that, described network side obtains the media-independent switching capability information of each Access Network by the visit information server, and according to the control point of these ability information and described multimode terminal suggestion, the decision network side is to the control point of this multimode terminal suggestion.
5. multimode terminal network according to claim 2 switches or network selecting method, it is characterized in that, by the position at described multimode terminal final decision control point.
6. multimode terminal network according to claim 2 switches or network selecting method, it is characterized in that, by the position at described network side final decision control point.
7. multimode terminal network according to claim 2 switches or network selecting method, it is characterized in that, initiates the control point by described multimode terminal and consults.
8. multimode terminal network according to claim 2 switches or network selecting method, it is characterized in that, initiates the control point by described network side and consults.
9. multimode terminal network according to claim 2 switches or network selecting method, it is characterized in that, the relevant information specific messages transmission through consultation that consult at described control point, perhaps,
The relevant information that consult at described control point is attached in switching initialization request message and response message thereof and is transmitted.
10. switch or network selecting method according to each described multimode terminal network in the claim 1 to 9, it is characterized in that, at described multimode terminal and network side default control point is set in advance, if described multimode terminal and network side then use this default control point about the negotiation failure at control point.
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