CN101039504B - Method for negotiating support of media-independent handover protocol between terminal and network side - Google Patents
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Abstract
The present invention provides a method of terminals and network sides negotiating the support situation of the switching agreement MIH unrelated to the media, including: the mobile terminal MS and the base station BS inform each other whether their own body supports the MIH function or not; the said MS and BS negotiate the MIH ability parameter values they both support, in determining that the said MS and BS networks both support MIH function; When the terminal needs to communicate with the said service network in the switching process, the negotiated MIH ability parameter values are used to switch the process communication. Application of the present invention, can realize the communication that the terminals and networks both support the MIH parameters in the switching process, thereby avoiding the analytic confusion of interactive information between terminals and networks.
Description
Technical field
The present invention relates to wireless communication technology field, be meant that especially a kind of terminal and network side confer the method that media independent handoff protocol (MIH) is supported situation.
Background technology
Micro-wave access to global intercommunication (WiMAX, World Interoperability for MicrowaveAccess) is a wireless MAN access technology, and its maximum transfer speed 75Mbit/ second, signal transmission radius reaches 50 kilometers, can cover outskirts of a town basically.Because this long-distance transmissions characteristic, WiMAX will be not only the technology that solves wireless access, can also insert the wireless extensions of (Cable, DSL) as cable network, realize that easily backwoodsman network connects.
WiMAX has defined the handoff procedure between the dissimilar medium in order to support the business continuance in user's moving process in IEEE 802.21 standards.Mobility management protocol stack as shown in Figure 1, IEEE 802.21 standards have been introduced a new protocol function layer-media-independent switching (MIH in the mobility management protocol stack of terminal and network, Media Independent Handover) layer is with seamlessness and the continuity that realizes switching.
MIH plays the function of assistant and boost motor in switching decision.MIH offers mobility management protocol stack upper strata (the MIH application layer is as MIH-user) need make some necessary informations of switching decision and how effectively making the switching decision.MIH provides unified service interface for mobility management protocol stack upper strata, the service primitive of unified interface is independent of the certain protocol stack of following different access technologies, that is to say the access technology that has shielded mobility management protocol stack lower floor (medium Access Layer, Media Access).
Realize the switching of portable terminal between two dissimilar mobile networks, as if the words that realize by 802.21 MIH that define, necessarily require terminal and network side all to possess the MIH function, but in real network, when terminal is striden the switching of different type network system, because network may be from different manufacturers with terminal, may occur between service network system and the terminal, and between service network and the objective network MIH function is supported differently, and the MIH ability item parameter that institute can support may difference.Thereby cause in handoff procedure terminal with the parsing of network interaction information the time, confusion will take place, thereby influence the interoperability of system.
At present, MIH is in the draft of standard and formulates the stage, and the technology that addresses this problem is not provided as yet.
Summary of the invention
In view of this, main purpose of the present invention has been to provide a kind of terminal and network side to confer the method that MIH supports situation, use the MIH ability item parameter communication of all supporting with terminal and base station in the realization handoff procedure, the parsing of avoiding switching interactive information takes place chaotic.
Terminal provided by the invention and network side are conferred media independent handoff protocol MIH and are supported the method for situation to comprise:
A, mobile terminal MS and a base station BS inform whether the other side self supports the MIH function;
B, after definite described MS and described BS place network are all supported the MIH function, described MS and described BS consult the MIH ability item parameter value that both sides all support;
C, when MS needs with the network service of described BS place in handoff procedure, use MIH ability item parameter value after the described negotiation to carry out communication in the handoff procedure.
Wherein, whether described the other side of informing of steps A self supports the step of MIH function to comprise: BS sends and comprises the broadcast whether this BS place network supports the MIH function; MS determines according to described broadcast whether this BS place network supports the MIH function.
Wherein, described broadcast is one of following: the downlink map cell that periodically carries among the downlink channel describing message DCD of downlink map message DL_MAP, periodic broadcast, the downlink map message DL_MAP.
Wherein, whether described the other side of informing of steps A self supports the step of MIH function to comprise: BS sends the broadcast that comprises uplink map message UL_MAP; Comprise the uplink map message cell of specifying specific resource-area in the described uplink map message; Whether the MS that receives described broadcast supports the message of MIH ability to described BS feedback MS in described specific resources district.
Wherein, described network is for non-current when providing the network of service for MS, and further comprise behind the step B: MS reports the current service network with the MIH ability item parameter value of described negotiation; The different MIH ability item parameter value that the MS of the network based reception of current service reports is determined the network that this MS can switch to.
Wherein, described network is the non-current network that service is provided for MS, and when described MS and described BS can't direct communications, the step of the described negotiation of step B comprises: the BS of MS place current service network carries out this MS and the described non-current forwards that the network B S of service is provided for MS as the agency of described MS.
Wherein, described network is for non-current for MS provides the network of service, and the current service network storage of MS place during the MIH ability item parameter value of MS; The described negotiation step of step B comprises: MS place current service network and described non-current described MS of network negotiate and the described non-current MIH ability item parameter value that provides the network both sides of service all to support for MS that service is provided for MS; And described result sent to MS.
Wherein, the described negotiation step of step B comprises:
BS/MS receives the MIH ability item parameter value of being supported that MS/BS sends;
BS/MS supports MIH ability item parameter value with the MS/BS that obtains and the MIH ability item parameter value that self can support is got common factor, as negotiation result;
BS/MS returns described negotiation result to MS/BS.
Wherein, the described negotiation step of step B comprises:
BS/MS receives the MIH ability item parameter value of being supported that MS/BS sends;
BS/MS supports MIH ability item parameter value with the MS/BS that obtains and the MIH ability item parameter value that self can support is got common factor, and taking-up one subclass is as negotiation result from described common factor;
BS/MS returns described negotiation result to MS/BS.
Wherein, described MIH ability item parameter value comprises one of following or combination in any: support the MIH function list of thing, support command list (CLIST), the MIH transmission of messages mode of MIH function to tabulate.
Wherein, described negotiation MIH ability item parameter value is carried among the terminal capability request message SBC-REQ, corresponding, described negotiation result is carried among the terminal capability response message SBC-RSP; Or,
Described negotiation MIH ability item parameter value is carried among the register request message REG_REQ, corresponding, described negotiation result is carried among the enrollment response message REG_RSP.
As seen from the above, the present invention is before terminal switches, terminal and network both sides confer the MIH ability ability of carrying out that can support separately, consult that the back selects that the both supports MIH ability item parameter value or consider from the MIH ability item parameter value of all supporting, to choose specific MIH ability item parameter value based on delegated strategy as the follow-up information interaction in handoff procedure based on MIH, avoid terminal and network to cause that because of the MIH ability is different confusion takes place in the parsing of interactive information in the handoff procedure.
Description of drawings
Fig. 1 is a mobility management protocol stack schematic diagram;
Fig. 2 is a MIH functional entity schematic diagram;
The flow chart that Fig. 3 consults for MIH of the present invention;
Fig. 4 is the access procedure of eating dishes without rice or wine of the MS that defines among the IEEE 802.16e.
Embodiment
The invention provides a kind of terminal and network side and confer the method that MIH supports situation based on media independent handoff protocol, use the MIH ability item parameter of all supporting to communicate with terminal and base station in the realization handoff procedure, avoid the parsing of interactive information in the handoff procedure to take place chaotic.The present invention can be divided into following components:
First: mobile terminal MS and base station BS inform whether the other side self supports the MIH function;
Second portion: after the definite support of described network, enter and consult the MIH ability item parameter value process that both sides all support between terminal and the base station to the MIH function;
Third part: when terminal communicated with the base station of this network in handoff procedure, both sides used the MIH ability item parameter value of all supporting to carry out communication in the handoff procedure.
Below the present invention is described in detail:
For first above-mentioned, be terminal before access network, terminal and base station be the discovery procedure each other of MIH ability separately, notifies in other words conj.or perhaps the process of whether supporting MIH function (support and do not support) each other.
Wherein, can adopt the downlink map message (DL_MAP) of IEEE 802.16x standard code to come radio network whether to support the MIH function, but because the DL_MAP information broadcast is very frequent, whether frequent radio network supports the MIH function information can waste bigger interface-free resources, therefore can also adopt following improvement project:
Scheme 1: by downlink channel describing message (DCD, Downlink ChannelDescription) periodic broadcast.Whether in IEEE 802.16x agreement, DCD message is with some common parameters of some cycles broadcast downstream channel, broadcast for supporting the MIH function information can be carried in the DCD message among the present invention.
Scheme 2:DL_MAP message can be carried the downlink map cell (DL_MAP_IE, DL_MAP_IE has a variety of, DL_MAP_IE is the general designation of the various different I E in the DL_MAP message) in order to the statement specific function.The present invention can increase a DL_MAP_IE, carry network and whether support the information of MIH (being recorded as MIH_MAP_IE), and this MIH_MAP_IE is appeared in the DL_MAP message with certain cycle, thereby, allow and carry network and whether support the information of MIH ability with certain periodic broadcasting, with respect to using the DL_MAP information broadcast to reduce broadcasting frequency, save interface-free resources.
The method that provides base station notice terminal network that the MIH ability is supported above, for the method for terminal informing base station terminal to the support of MIH ability, can be to report by the feedback information of terminal to network side information, enumerate an example below: the base station is at the uplink map message (UL_MAP of broadcasting, being used for base station broadcast and giving the resource allocation conditions of terminal with the notice sub-frame of uplink) lining increases and carries the cell (UL_MAP_IE of a uplink map, the present invention is designated as MIH_MAP_IE), this message has specified specific resource-area (to refer to specific interface-free resources, as particular time-slot), allow terminal whether support the MIH ability information at this resource-area feedback terminal.According to feedback information, the base station just can be understood terminal and whether support the MIH function.This is to go out because consider when network need push away certain particular terminal (push) for considerations such as resource or QoS assurances, it may can choose a specific ambient network for this terminal before push allows terminal switch in the past, by this mode, the base station just can be understood and wants push to go out to switch to the terminal of particular network whether to support the MIH function.
Before introducing second portion and being the MIH functional parameter negotiations process of being supported between terminal and the terminal, at first to MIH function items parameter, promptly the content that will consult is introduced.
If the protocol stack to Fig. 1 is distinguished with function, can provide functional layer as shown in Figure 2, the MIH functional layer (MIH Function) of the MIH layer corresponding diagram 2 of Fig. 1, the event source entity of the following corresponding diagram 2 of MIH layer of Fig. 1 (Event Source Entities), the upper layer entity of the above corresponding diagram 2 of MIH layer of Fig. 1 (Upper Layer Entities).Following title define method is followed in communication between each layer:
1) intercommunication primitive that makes progress from bottom all is referred to as incident (event), and promptly the primitive back all increases an Event suffix; All be referred to as order (Command) from the downward intercommunication primitive of high level, promptly the primitive back all increases a Command suffix;
2) intercommunication primitive between bottom and the MIH functional entity is referred to as " link " level, and promptly the primitive front all increases the Link prefix; Intercommunication primitive between MIH functional entity and the higher layer protocol entities (as MIH user) is referred to as " MIH " level, and promptly the primitive front all increases the MIH prefix.
From Fig. 2,, then must support the incident of link level and the incident and the order of order and MIH level if support the MIH function.And it is a variety of to support that the incident of MIH function and order have, and each incident and order may individualisms or existed simultaneously.As follows to the parametric description that relates to the MIH function below:
Support the list of thing of MIH function: the MIH Event Service can be divided into following 5 types:
Class1, bottom state change incident: these incidents are relevant with the change of PHY state with MAC, such as: Link Up and Link Down incident:
Type 3, predictability incident: based on past and present case, the incident that status attribute changes may take place, predicted events can be carried the information of time range and confidence level:
Type 4, link synchronization incident: provide with irrelevant other of MAC and PHY state change incident to help link layer action message that the upper strata carries out the mobile management decision-making to the upper strata:
Type 5, link transmission incident: the transmission state of high-rise PDU on this type of message indication link layer.
All MIH incidents can be referred in top these 5 kinds in the current agreement, incident is according to the level difference, (because following each shown listed content is the existing protocol specified content to the MIH level incident shown in link level incident shown in the table 1-1 and the table 1-2 below being divided into, non-emphasis of the present invention, and the present invention is not described concrete message, so the message in following each table is not translated).
| NO. | Link event type Link Event Type | Link event title Link Event Name | Description is described |
| 1 | State?Change | Link?Up | L2?connection?is?established?and?link is?available?for?use |
| 2 | State?Change | Link?Down | L2?connection?is?broken?and?link?is not available?for?use |
| 3 | Predictive | Link?Going?Down | Link?conditions?are?degrading?& connection loss?is?imminent |
| 4 | State?Change | Link?Detected | New?link?has?been?detected |
| 5 | Link?Parameters | Link?Parameters Change | Link?parameters?have?crossed specified threshold |
| 6 | Administrative | Link?Event Rollback | Previous?link?event?needs?to?be rolled back |
| 7 | Link Transmission | Link?SDU Transmit?Status | Indicate?transmission?status?of?all PDU segments |
| 8 | Link Synchronous | Link?Handover Imminent | L2?handover?is?imminent?based?on changes?in?link?conditions |
| 9 | Link Synchronous | Link?Handover Complete | L2?link?handover?to?a?new?PoA?has?been completed |
Table 1-1
| NO. | MIH event type MIH Event Type | MIH incident title MIH Event Name | Description is described |
| 1 | State?Change | MIH?Link?Up | L2?connection?is?established?and link?is?available?for?use |
| 2 | State?Change | MIH?Link?Down | L2?connection?is?broken?and?link?is not available?for?use |
| 3 | Predictive | MIH?Link?Going Down | Link?conditions?are?degrading?& connection?loss?is?imminent |
| 4 | State?Change | MIH?Link Detected | New?link?has?been?detected |
| 5 | Link?Parameters | MIH?Link Parameters Change | Link?parameters?have?crossed specified threshold |
| 6 | Administrative | MIH?Link?Event Rollback | Previous?link?event?needs?to?be rolled back |
| 7 | Link Transmission | MIH?Link?SDU Transmit?Status | Indicate?transmission?status?of?all PDU segments |
| 8 | Link Synchronous | MIH?Link Handover Imminent | L2?handover?is?imminent?based?on changes?in?link?conditions |
| 9 | Link Synchronous | MIH?Link Handover Complete | L2?link?handover?to?a?new?PoA?has?been completed |
Table 1-2
Support the command list (CLIST) of MIH function, the command list (CLIST) of the link level shown in the table 2-1 below comprising,
The command list (CLIST) of the MIH level shown in the table 2-2:
| NO. | Link command Link | Note Comments | |
| 1 | Link?Configure Thresholds | Configure?the?thresholds?for?various?link?layer?events such?as?Link?Going?Down |
Table 2-1
| NO. | MIH order MIH | Note Comments | |
| 1 | MIH?Get?Status | Get?the?tatus?of? |
|
| 2 | MIH?Switch | Switch?the?links?as?specified | |
| 3 | MIH?Configure | Configure?a?link | |
| 4 | MIH?Configure | Configures?thresholds?for?link?events |
| Link Thresholds | ||
| 5 | MIH?Scan | Scan?a?link |
| 6 | MIH?Handover Initiate | Network?initiates?handover?and?sends?a?list?of suggested?networks?and?associated?Points?of Attachment |
| 7 | MIH?Handover Prepare | This?command?is?sent?by?current?MIHF?entity to?target?MIHF?entity?to?allow?for?resource query?and?handover?preparation. |
| 8 | MIH?Handover Commit | In?this?case?the?client?commits?to?do?the?handover and?sends?it’s?choice?of?selected?network and?associated?PoA. |
| 9 | MIH?Handover Complete | Notification?from?new?serving?MIHF?to?previous serving?MIHF?indicating?handover?completion， and?any?pending?packets?may?now?be forwarded?to?the?new?MIHF. |
| 10 | MIH?Network Address Information | Sent?from?current?serving?MIHF?entity?to?target MIHF?entity?to?obtain?reconfigured?network address?on?target?network?for?the?client. |
Table 2-2
Support the tabulation of MIH transmission of messages mode, comprise the transmission means tabulation shown in the following table 3:
| NO. | Note |
| 1 | Be supported in and transmit MIH message on the |
| 2 | Be supported in layer 3 or the more high-rise transmission MIH message that goes up |
Table 3
All information is listed in above-mentioned tabulation, when the information that sends does not comprise a certain content, then expression is not supported this, when for example not comprising second in the table 3, expression only is supported in and transmits MIH message on the layer 2, when comprising article one and second, expression promptly is supported in transmits on the layer 2 that MIH message is supported in layer 3 again or more high-rise going up transmitted MIH message.
After terminal and network are notified the MIH function that supports one another, both sides carry out the negotiations process of MIH ability item parameter value, comprise: BS/MS receives the MIH ability parameter item of being supported that MS/BS sends, thereby behind the acquisition MIH ability parameter item that MS/BS supported, compare with the MIH ability parameter item that self can support, draw the result after the negotiation, and the result is returned to MS/BS, finish negotiations process when being used to switch process, use the MIH after consulting to communicate.
Referring to Fig. 3, determine that with the BS side MIH ability item that both sides all support is an example, negotiations process is elaborated to MIH ability item parameter value of the present invention:
Step 301: carry the MIH ability item parameter value that oneself can support in the BS message sending to by MS, comprise the support MIH function of MS list of thing, support the command list (CLIST) and the MIH transmission of messages mode of MIH function to tabulate.
Being understood that, also can be when MS receives that requirement that BS issues reports the querying command of the MIH ability item parameter value that can support, reports its MIH ability item parameter value of supporting to BS again, also can be that MS initiatively sends.
The MIH ability item parameter (list of thing that comprises the MIH function of BS place network support that step 302:BS can support according to this pre-configured network of network side, support the command list (CLIST) and the MIH transmission of messages mode of MIH function to tabulate), and the MIH ability item parameter value that the terminal of carrying in the message that receives can be supported compares the mutual MIH ability item parameter value of all supporting use of the definite both sides of negotiation.
Wherein, a basic machinery of consultation is to get common factor, just the MIH ability item parameter of terminal support and the MIH ability item parameter of BS place network support is carried out intersection operation, and the result is exactly the list of thing after consulting.Can certainly be according to a subclass in certain this common factor of strategy taking-up as last result.Should comprise in this negotiation result that both sides all support the MIH incident used or/and person's order, and transmission mode.
Special, be preconfigured to when supporting all MIH ability item parameters for network side, the terminal that the MS that BS receives carries can be supported MIH functional parameter value, the MIH ability item parameter value of all supporting as final both sides.BS may be stored in final negotiation result in other entity of self or network side.
Step 303, the result after BS will consult (comprising the MIH ability item parameter value that both sides support) sends to described MS, and MS need store final negotiation result.
Step 304: afterwards, the MIH ability item parameter value that good through consultation both sides all support between BS and the MS carries out follow-up reciprocal process.For example, MS need be when this BS be connected to network and initiate switches, and when perhaps MS will switch to this BS and is connected to network, then carries out communicating by letter in the handoff procedure with the MIH ability item parameter that is consulted with this BS.
Especially, in the WiMAX network, can finish this process by REG_REQ/RSP message (perhaps SBC-REQ)/when using above corresponding (or SBC-REQ be SBC-RSP) message.Show among the IEEE 802.16e as Fig. 4 and to have defined air interface specification, defined the access procedure of eating dishes without rice or wine of MS, comprising:
First step: the scanning down channel, set up between MS and the BS synchronously;
Second step: the up transmission parameter of obtaining MS;
Third step: carry out range finding, adjust power and delay parameter;
The 4th step: negotiate for basic capability comprises the negotiation of the IP protocol version that MS and BS support and determines;
The 5th step: to authentication, the mandate of MS, MSIP address assignment/obtain, the carrying that IP connects is set up.
When the present invention utilizes this process to realize supporting the negotiation of MIH ability parameter, the negotiation that above-mentioned terminal and network side carry out the MIH tenability can occur in the 4th step above-mentioned or the 5th step process, and implementation promptly increases the negotiation information of carrying the MIH ability parameter in the administrative messag SBC-REQ/RSP that eats dishes without rice or wine (terminal capability request) of IEEE 802.16x definition or REG_REQ/RSP (registration request) message.
MIH capability negotiation process between MS of being described above and the BS that served.After the BS of MS and adjacent service network carries out MIH capability negotiation (negotiations process is with last identical), behind the MIH capability negotiation result who obtains adjacent networks, can report current service network B S, with the decision-making and the process of carrying out that is used for switching.For example, when MS and adjacent networks have carried out after MIH consults, when switching the select target network, can select the network of the MIH ability that those support terminals allow, thereby reporting the objective network tabulation to service network when, the scope of objective network be can dwindle, communication and resource overhead between current network and the objective network reduced.
When MS and adjacent networks BS can not directly carry out the MIH capability negotiation, its current service network B S is as the agency of terminal, carry out MIH capability negotiation with adjacent networks BS, can think that current network BS carries out the order forwarding of MS and adjacent networks BS, execution in step and last similar about this terminal.
If MS supported item in the MIH ability of the MS of this network registry stage acquisition before the BS of the service network that MS is current had stored; Then this BS can utilize these information by backbone network notice adjacent networks BS, according to these information this terminal is carried out the tenability negotiations process of MIH by adjacent networks BS, and with the result directly by eating dishes without rice or wine or BS by the current service network is transmitted to terminal.Can wait until that also terminal and adjacent target network carry out mutual the time, objective network informs that more described negotiation result gives terminal (because objective network has been known terminal MIH tenability item in advance by the scheme here).Be understood that the process of informing can be that terminal active request mode also can be an initiatively send mode of network.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
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| CN2006100575911A CN101039504B (en) | 2006-03-16 | 2006-03-16 | Method for negotiating support of media-independent handover protocol between terminal and network side |
| PCT/CN2007/000802 WO2007104256A1 (en) | 2006-03-16 | 2007-03-13 | A method and device for negotiating the support status of mih protocol between the terminal and the network side |
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| CN200810081012A Division CN101257718B (en) | 2006-03-16 | 2006-03-16 | System, base station and mobile terminal of negotiating medium irrelevant switch protocol supporting instance |
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| CN1538707A (en) * | 2003-10-24 | 2004-10-20 | 中国科学院计算技术研究所 | An Adaptive Multimedia Distributed Playing Method in Terminal Application Protocol |
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| US7899457B2 (en) * | 2004-03-11 | 2011-03-01 | Nokia Siemens Networks Gmbh & Co. Kg | Method of packet switched handover |
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| WO2007104256A1 (en) | 2007-09-20 |
| CN101039504A (en) | 2007-09-19 |
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