CN100484311C - Method for processing multiple mode terminal abnormal quick net failure - Google Patents

Abstract

The present invention discloses multiple mold terminal abnormal fast network disconnection processing method. Said method includes A, configuring multiple mold terminal abnormal fast network disconnection event service system in communication protocol stack of multiple mold terminal and point of attachment POA entity; B, multiple mold terminal abnormal fast network disconnection event generating, through network side entity leading to complete multiple mold terminal accessing target network. The present invention provides terminal directly to make service switching with target network side entity without service authenticating.

Description

A kind of processing method of multiple mode terminal abnormal quick net failure

Technical field

The present invention relates to moving communicating field, specifically, relate to the processing method of multiple mode terminal abnormal quick net failure.

Background technology

Along with the reality of multiple communication network in the coexistence of a certain zone has appearred in the development of mechanics of communication, can support simultaneously and the multi-mode terminal equipment of multiple network communication also is accompanied by user's demand and produces, dual-mode handset for example, dual-mode handset is meant the mobile phone that can select to use two cover different technologies standard mobile networks arbitrarily, dual-mode handset can therefrom make a choice according to the needs of environment or practical operation, which network technology more can play a role, and just allows mobile phone switch to which kind of pattern work.The situation that multimode terminal is applied to different media networks as shown in Figure 1, the terminal that wherein has the media-independent switching capability can be used in 4 different networks such as WLAN (wireless local area network), cellular network.

The multimode terminal technology can be supported the cross-module roaming, improve communication reliability, but because heterogeneous networks coverage and professional ability there are differences, and the user wishes that the terminal equipment that oneself uses can realize seamless switching between different media networks, thereby guarantee own professional continuity, so the application need of multimode terminal in heterogeneous networks solves the problem of its seamless switching.IEEE 802.21 standards propose at such demand, and this agreement has proposed a kind of framework for multimode terminal realization media-independent handed over service as shown in Figure 2.As shown in Figure 3, this agreement increases a media-independent switchable layer between two layers (MAC layer MediaAccess Control MAC layer) and three layers (network layer) of network entity, this layer by define in the agreement with upper strata (MIH client layer), lower floor (the L2 layer and below, perhaps refer to be used for controlling the network management entity of link layer), SME (Station Management Entity station management entity, comprise network management entity) reach interface with MIH (switching of the Media Independent Handover media-independent) entity of layer, be that multimode terminal realizes that the irrelevant switching of seamless media provides incident, order, information service.

There is to fall the problem of net in multimode terminal as single-mode terminal, disconnects the length of process time according to terminal and the current POA that is connected (Point of Attachment attachment point), and terminal is fallen net can be divided into two kinds of situations: normally fall net and abnormal quick net failure.Normally fall net and be meant that terminal weakens gradually with the concatenation ability of the current POA that is connected, monitor concatenation ability from link layer and be attenuated to the process that link disconnects fully has relatively to grow, terminal can be finished media-independent by current POA and the MIH service entities that is positioned at network side and switches needed information interaction (as the POA information of adjacent domain, new link establishment time resource reservation etc.) in this process, thereby determines switching target network type and target P OA so that finish switching between the irregular medium; Abnormal quick net failure is meant terminal because certain abnormal cause (as occurring barrier or POA fast break between terminal and POA fast) loses concatenation ability with current POA in a short period of time, because this process is very short, terminal has little time with the MIH service entities that is positioned at network side media-independent to be switched the information that needs by current POA and carries out alternately, therefore for the hand-off process under the above-mentioned abnormal quick net failure situation just can not with normally fall hand-off process under the net situation and adopt and use the same method, when the terminal quick net failure for the continuity of maintenance service, need between terminal and new POA, set up a new communication link with the interrupted service that continues, for the present adoptable processing method of the foundation of this link is to finish by terminal is leading, be exactly by the POA of the available targets network of terminal active scan neighboring area behind quick net failure, after determining target P OA, further be accomplished to the access of objective network, then by the new network interrupted service that continues, thisly need carry out processes such as access authentication again, have the slow-footed problem that continues by the leading mode of setting up new link of terminal.

Multimode terminal falls to switch to behind the net the new network interrupted service that continues provides services such as incident, order and information by above-mentioned media-independent switchable layer.Below carry out general description in present 802.21 agreements media-independent being provided by the Event Service provide, as shown in Figure 4, two class incidents have been defined in present 802.21 agreements: link layer event and MIH layer incident, wherein link layer event is produced by protocol stack lower floor (MAC layer, link layer), and be provided to the MIH layer, the lower floor that incident that is produced by MIH layer itself and MIH layer receive and the incident (the MIH layer is notified upper layer entity in the mode of incident equally) of far-end belong to MIH layer incident, and these incidents have just constituted the Service events of MIH layer.In addition, in 802.21 agreements also at the service mechanism that has defined the local and remote two kinds of incidents shown in accompanying drawing 5 and accompanying drawing 6 in this two classes incident respectively.

Link layer event flow model as shown in Figure 7 and the MIH layer flow of event model shown in the accompanying drawing 8, according to the current 802.21 Event Service mechanism that provide, the Event Service of terminal in order when media-independent switches, to use the MIH layer to provide, the upper strata needs to register the incident (as MIH_Link_going_down and MIH_Link_down) of desiring the service of obtaining to the MIH layer in advance, the MIH layer also needs lower floor (as MAC/LLC) the registration events corresponding service (as Link_going_down and Link_down) of respective media type simultaneously, after finishing corresponding registration, when the lower floor (as MAC/LLC) of terminal when the link transmission ability that monitors current use weakens and will disconnect, lower floor (as MAC/LLC) the MIH layer of meeting on terminal that is positioned at this locality or far-end POA provides the event prompt of Link_going_down.Indication, and indication MIH layer from provide described event prompt the time time interval when being carved into the Link_down incident and really taking place, the MIH layer is reported these information by MIH_Link_going_down.Idication to upper strata (switch decision module) simultaneously, the upper strata begins to do the preliminary treatment work of switching after receiving the event prompt of MIH_Link_going_down, as the POA information of the POA of indicating terminal by current connection to the current near zone in information server requesting terminal that is positioned at network side, or the relevant network entity of notice is done resource reservation etc.If the upper strata has received the MIH_Link_down incident in the above-mentioned time interval, illustrate that chain rupture really takes place, the upper strata is confirmed then that current link has disconnected and initiated and is switched; If the upper strata does not receive the MIH_Link_down incident in the above-mentioned time interval, it is invalid that the MIH_Link_going_down incident that had so before received will be regarded as, and the upper strata does not then initiate to switch.

This shows, media-independent when 802.21 present agreements can support that multimode terminal normally falls to net switches, but for the situation of abnormal quick net failure, switching provides to media-independent Service events and the service mechanism that define in existing 802.21 agreements can't well be supported.

Summary of the invention

The object of the present invention is to provide the processing method of multiple mode terminal abnormal quick net failure, solve the problem that prior art can't in time be handled multiple mode terminal abnormal quick net failure.

For achieving the above object, the present invention adopts following technical scheme: a kind of processing method of multiple mode terminal abnormal quick net failure, and described method may further comprise the steps:

A, the communication protocol stack on multimode terminal and attachment point S-POA entity are set the service mechanism to the multiple mode terminal abnormal quick net failure incident;

After b, multiple mode terminal abnormal quick net failure incident take place, finish the access of multimode terminal to objective network by network side entity is leading.

Wherein step a specifically comprises:

MIH layer registration " MIH layer abnormal quick net failure incident " switched to media-independent separately in the upper strata of a1, multimode terminal and attachment point S-POA entity;

A2, described MIH layer are registered " link layer abnormal quick net failure incident " to lower floor separately.

Wherein also comprise before the step b:

Multimode terminal inserts current network by its S-POA that adheres to;

Multimode terminal is reported to information of terminal user service UE IS entity with the terminal related information of self by described S-POA, perhaps obtains above-mentioned information by UEIS by the inquiry inquiry.

Wherein step b specifically comprises:

After the lower floor of the communication protocol stack of b1, multimode terminal and the S-POA that adheres to thereof monitors the abnormal quick net failure incident, with this event notice separately the MIH layer and by MIH layer notice upper strata separately;

B2, S-POA controlled function entity obtain terminal related information and media-independent handover relevant information from UEIS functional entity and media-independent service MIIS functional entity respectively;

B3, S-POA controlled function entity determine the objective network POA that switches based on described terminal related information and media-independent handover relevant information, and when handling abnormal quick net failure be the controlled function entity of the T-POA of multimode terminal decision-making control that described T-POA sets up and described multimode terminal between new link.

Wherein the described monitoring abnormal quick net failure of step b1 incident is to realize by following method:

In multimode terminal and POA entity, set the threshold value SSmin of the lowest signal intensity can satisfy multimode terminal and POA normal communication needs and/or service quality QoS parameter and when normally falling to net multimode terminal obtain the threshold T min of needed shortest time of media-independent handover information from network side media-independent service entities;

If multimode terminal and POA entity lower floor monitored in the time interval less than Tmin, the signal strength signal intensity of the other side's communication node entity of current link and/or the value of service quality QoS parameter are reduced to value less than SSmin fast from the normal communication upstate, then judge terminal generation quick net failure incident.

Wherein step b2 specifically comprises:

S-POA controlled function entity is at first consulted the maintenance of current business with distant terminal, send terminal related information and the request of media-independent handover relevant information to UEIS functional entity and MIIS functional entity simultaneously;

UEIS functional entity and MIIS functional entity return institute's information requested to S-POA controlled function entity.

Wherein said terminal related information comprises terminal identity identifying information, current business relevant information and the access authentication authentication information that arrives other networks, and wherein said terminal identity identifying information comprises hardware interface address, IP address and other identity identification information.

Wherein step b3 specifically comprises:

Described T-POA controlled function entity is initiated requests such as access, business authentication, resource reservation based on described terminal related information to described switching target network;

T-POA controlled function entity is finished described multimode terminal after the access authentication and resource reservation process of objective network, the access of multimode terminal to described objective network finished in the request that T-POA initiates and described multimode terminal is set up communication link to the multimode terminal region, described T-POA and multimode terminal alternately;

Described T-POA and multimode terminal finish alternately that multimode terminal is further finished after the access of described objective network because the continuing of quick net failure and interrupting service.T-POA and multimode terminal are set up and are finished behind the new communication link because the continuing of quick net failure and interrupting service.

The present invention overcomes the deficiencies in the prior art, provide a kind of by the leading mechanism of network side entity to the multiple mode terminal abnormal quick net failure event handling, make when terminal abnormal quick net failure network side entity in time to determine target P 0A based on the information of the relevant terminal current region objective network P0A that provides from the relevant information that obtains and the MIIS server of terminal in advance, in time finish the access of terminal to objective network, business authentication etc., directly carry out professional continuing (no longer needing business authentication) by terminal and objective network side entity, accelerated professional handshaking procedure.

Description of drawings

Fig. 1 is the schematic diagram that multimode terminal is applied to multiple network;

Fig. 2 is the Organization Chart that the multimode terminal of 802.21 protocol definitions is realized the media-independent handed over service;

Fig. 3 is that the media-independent switchable layer and the levels of 802.21 protocol definitions concerns schematic diagram;

Fig. 4 is the schematic diagram of the link layer event and the MIH layer incident of 802.21 protocol definitions;

Fig. 5 is the remote link layer Event Service schematic diagram of mechanism of 802.21 protocol definitions;

Fig. 6 is the long-range MIH layer Event Service schematic diagram of mechanism of 802.21 protocol definitions;

Fig. 7 is the link layer event flow model figure of the processing of 802.21 protocol definitions when normally falling to net;

Fig. 8 is the MIH layer flow of event illustraton of model of the processing of 802.21 protocol definitions when normally falling to net;

Fig. 9 is the multimode terminal that defines in the embodiment of the invention and the POA protocol stack separately service mechanism schematic diagram to the quick net failure incident;

The leading message interaction process figure that sets up new link of network side when Figure 10 is the described multiple mode terminal abnormal quick net failure of the embodiment of the invention.

Embodiment

Be described in detail inventing described technical scheme below in conjunction with the drawings and specific embodiments.

In general abnormal quick net failure is not because terminal mobile makes that distance has exceeded signal cover between itself and the POA and cause, and often since other reasons reasons such as (as occurring barrier or POA fast break between terminal and POA fast) cause.Abnormal quick net failure is for single-mode terminal, because terminal is only in the sub-district that the current base station signal covers, in case for a certain reason (as occurring barrier or POA fast break between terminal and POA fast) abnormal quick net failure takes place, single-mode terminal just can't continue to use the present base station communication and have to interrupt current business, but for multimode terminal, because multimode terminal can obtain business service by the various types of media access network, and the POA of different media types exists at the same area usually, and this just provides possible for the link connection interrupted service that multimode terminal is set up new medium type when the abnormal quick net failure as early as possible.

Should invent a kind of processing method is provided when switching to multiple mode terminal abnormal quick net failure based on media-independent, generally speaking, method provided by the invention can be divided into two links: the one, and the service mechanism that the protocol stack on two communication nodes (terminal, POA) when being positioned at quick net failure provides the quick net failure incident, this service mechanism can guarantee after the lower floor of protocol stack is monitoring the quick net failure incident can be in time with this event notice to the upper strata, make upper strata (switch decision module) can in time make countermeasure at abnormal quick net failure; The 2nd, for the continuity of maintenance service, when the terminal quick net failure, need between terminal and new POA, set up a new communication link with the interrupted service that continues, the foundation of this link can be finished by network side entity is leading.Just be meant when the multimode terminal generation abnormal quick net failure by leading the finishing of network side entity,, continue based on the medium type of the current service related information of multimode terminal, terminal support and to the leading accesses of finishing terminal to objective network such as CAMEL-Subscription-Information of related service network by network side entity because quick net failure and interrupted service.

Specify below, at first need the abnormal quick net failure incident is monitored for finishing above-mentioned process, the lower floor that it needs to be noted the protocol stack on two communication nodes (terminal, POA) need be based on certain method to the monitoring of abnormal quick net failure situation, and this method can be relevant with medium type.Adopt following method by protocol stack lower floor monitoring multiple mode terminal abnormal quick net failure situation in the present embodiment: communication node entity (terminal, POA) need be set as follows threshold value in order to finish the monitoring to the abnormal quick net failure incident: can satisfy lowest signal intensity (POA signal/terminal signaling) the value SSmin of terminal and POA normal communication needs and when normally falling to net terminal obtain the needed shortest time Tmin of media-independent handover information from network side media-independent service entities.According to above-mentioned setting, if each communication node entity lower floor monitored in the time interval less than Tmin, the signal strength values of the other side's communication node entity of current link is reduced to value less than SSmin fast from the normal communication upstate, then can judge terminal generation abnormal quick net failure incident.In addition, in order to obtain more accurately monitoring result, can also determine in conjunction with the variation of the parameter value of sign QoS (service quality) such as the data traffic of current link, the error rate to the abnormal quick net failure incident.

In addition, support the quick net failure Event Service for making the protocol stack on two communication nodes (terminal, POA), at first need to define two incidents (MIH layer incident, link layer event) at the abnormal quick net failure situation, and register " MIH layer abnormal quick net failure incident " by two communication node upper stratas separately to its MIH layer respectively, so latter two communication node MIH layer separately is to its lower floor's registration " link layer abnormal quick net failure incident ".When the abnormal quick net failure situation may take place, at first monitor this abnormal quick net failure incident and give separately MIH layer based on above-mentioned method by the lower floor (MAC/PHY) of two communication nodes this event notification, notify separately upper strata by the MIH layer again, decision-making targetedly can be made by the context environmental of communication traffic when falling to net in the upper strata after receiving this quick net failure incident, and is correspondingly processed.At present, 802.21 defined a series of Link Event Service and MIH Event Service in the draft agreement, in these Event Service, increase by two incidents relevant in the present embodiment: Link_Quick_Down as shown in table 1 and the MIH_Link_Quick_Down shown in the table 2 with quick net failure, wherein Link_Quick_Down belongs to Link layer (link layer) incident, and MIH_Link_Quick_Down belongs to MIH layer incident.

Table 1 link layer event

Table 2 MIH layer incident

Between the relevant layers of the protocol stack on multimode terminal and the POA entity to the quick net failure event processing mechanism as shown in Figure 9, it is meant 3 layers (network layers) and the above protocol layer of protocol stack at the middle and upper levels, the MIH layer is the logic entity that service is provided for the media-independent switching of multimode terminal, and lower floor is meant 2 layers (LLC/MAC) and the following protocol layer of protocol stack.

Utilize two quick net failure incidents of above-mentioned definition, and 802.21 Event Service mechanism, terminal upper strata (switch decision module) is in advance in MIH layer and registration MIH_Link_Quick_Down of lower floor and Link_Quick_Down incident, when terminal lower floor (as LLC/MAC) monitors the generation of abnormal quick net failure incident, notify MIH layer by Link_Quick_Down.Indication, the MIH layer is notified the upper strata by MIH_Link_Quick_Down.Indication simultaneously, the upper strata after the prompting that receives the quick net failure incident, the processing policy in the time of can in time taking following being different from normally to fall online story to take place.

At the multimode terminal quick net failure, the upper strata is after the prompting that receives the quick net failure incident, and by the leading interaction flow of setting up information in the new link process of network side as shown in Figure 10, each functional entity of network side is represented following implication respectively among the figure:

S-POA: the POA that multimode terminal adheres to constantly at quick net failure;

T-POA: network side entity is the POA of terminal decision-making when handling quick net failure;

S-POA control: the functional entity of S-POA being implemented control;

T-POA control: the functional entity of T-POA being implemented control;

UEIS: the functional entity that terminal is provided the information service that its contracted user is relevant, business is relevant;

MIIS: terminal is carried out the functional entity that media-independent switches provides information service.

Wherein said terminal related information mainly comprises terminal identity identifying information, current business relevant information, arrives the access authentication authentication information of other network etc.Before the incident that causes terminal abnormal quick net failure takes place, terminal inserts current network by S-POA and obtains business service, at this moment, terminal media type information that oneself is supported, service related information and be reported to UEIS (or inquire about obtain by UEIS) to the S-POA by current connection such as the access authentication authentication information of other business networks.After the incident that causes the terminal quick net failure takes place, terminal at first open each media module be following continue ready, then by the support of protocol stack on the S-POA functional entity itself to the quick net failure Event Service, and the interacting message between S-POA functional entity and the S-POA controlled function entity (reports/inquire about, the situation of POA power down can be inquired about by S-POA controlled function entity), S-POA controlled function entity can perception terminal the quick net failure incident, after obtaining terminal quick net failure incident, S-POA controlled function entity is at first consulted the maintenance of current business with the other side, simultaneously send terminal related information and the request of media-independent handover relevant information to UEIS functional entity and MIIS functional entity, UEIS functional entity and MIIS functional entity return institute's information requested to S-POA controlled function entity, determine the objective network POA of switching based on above information S-POA controlled function entity for the multimode terminal that falls the online story part, and pass through T-POA controlled function entity and initiate to insert to determined switching target network, business authentication, requests such as resource reservation.T-POA controlled function entity is completing successfully multimode terminal after the access authentication and resource reservation process of objective network, T-POA controlled function entity is to the request that T-POA initiates and multimode terminal is set up communication link of current terminal region, and described T-POA and multimode terminal are finished the access of multimode terminal to described objective network alternately; Described T-POA and multimode terminal finish alternately that multimode terminal is further finished after the access of described objective network because the continuing of quick net failure and interrupting service.

Claims (7)

1, a kind of processing method of multiple mode terminal abnormal quick net failure is characterized in that, described method may further comprise the steps:

A, the communication protocol stack on multimode terminal and attachment point S-POA entity are set the service mechanism to the multiple mode terminal abnormal quick net failure incident;

After b, multiple mode terminal abnormal quick net failure incident take place, finish the access of multimode terminal to objective network by network side entity is leading.

2, method according to claim 1 is characterized in that, wherein step a specifically comprises:

MIH layer registration " MIH layer abnormal quick net failure incident " switched to media-independent separately in the upper strata of a1, multimode terminal and attachment point S-POA entity;

A2, described MIH layer are registered " link layer abnormal quick net failure incident " to lower floor separately.

3, method according to claim 1 is characterized in that, also comprises before the step b:

Multimode terminal inserts current network by the S-POA that adheres to;

Multimode terminal is reported to information of terminal user service UE IS entity with the terminal related information of self by described S-POA, perhaps obtains above-mentioned information by UEIS by inquiry.

4, method according to claim 1 is characterized in that, wherein step b specifically comprises:

After the lower floor of the communication protocol stack of b1, multimode terminal and the S-POA entity that adheres to thereof monitors the abnormal quick net failure incident, with this event notice separately the MIH layer and by MIH layer notice upper strata separately;

B2, S-POA controlled function entity obtain terminal related information and media-independent handover relevant information from UEIS functional entity and media-independent service MIIS functional entity respectively;

B3, S-POA controlled function entity determine the objective network POA that switches based on described terminal related information and media-independent handover relevant information, and when handling abnormal quick net failure be the controlled function entity control T-POA of the T-POA of multimode terminal decision-making set up and described multimode terminal between new link.

5, method according to claim 4 is characterized in that, wherein the described monitoring abnormal quick net failure of step b1 incident is to realize by following method:

In multimode terminal and POA entity, set the threshold value SSmin of the lowest signal intensity can satisfy terminal and POA normal communication needs and/or service quality QoS parameter and when normally falling to net multimode terminal obtain the threshold T min of needed shortest time of media-independent handover information from network side media-independent service entities;

If multimode terminal and POA entity lower floor monitored in the time interval less than Tmin, the signal strength signal intensity of the other side's communication node entity of current link and/or service quality QoS parameter value are reduced to value less than SSmin fast from the normal communication upstate, then judge terminal generation abnormal quick net failure incident.

6, method according to claim 4 is characterized in that, wherein step b2 specifically comprises:

S-POA controlled function entity is at first consulted the maintenance of current business with distant terminal, send terminal related information and the request of media-independent handover relevant information to UEIS functional entity and MIIS functional entity simultaneously;

UEIS functional entity and MIIS functional entity return information requested to S-POA controlled function entity.

7, according to claim 3 or 4 or 6 described methods, it is characterized in that, described terminal related information comprises terminal identity identifying information, current business relevant information and the access authentication authentication information that arrives other networks, and wherein said terminal identity identifying information comprises hardware interface address, IP address and other identity identification information.

8, method according to claim 4 is characterized in that, wherein step b3 specifically comprises:

Described T-POA controlled function entity is initiated requests such as access, business authentication, resource reservation based on described terminal related information to described switching target network;

T-POA controlled function entity is finished described multimode terminal after the access authentication and resource reservation process of objective network, the access of multimode terminal to described objective network finished in the request that T-POA initiates and described multimode terminal is set up communication link to the multimode terminal region, described T-POA and multimode terminal alternately;

Described T-POA and multimode terminal finish alternately that multimode terminal is further finished after the access of described objective network because the continuing of quick net failure and interrupting service.

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