CN101800958A - Method and system for obtaining emergency session information - Google Patents
Method and system for obtaining emergency session information Download PDFInfo
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Abstract
The invention provides a method and a system for obtaining emergency session information, comprising the following steps that (a) after a user device UE receives an emergency indication sent by an IMS (IP Multimedia Subsystem), the user device actively sends emergency loading indication information to an EPS (Evolved Packet System) network for indicating the emergency loading indication information being emergency loading; and (b) the EPS network receives the emergency loading indication information and recognizes whether a loading used by the current session is an emergency loading or not according to the emergency loading indication information. The method and the system can ensure the continuity and the voice quality of the current session and solves the problem of failure of emergency session handover.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of subscriber equipment when 3GPP (3rd GenerationPartnership Project, third generation partner program) network realizes that the IMS emergent session is professional, obtain the method and system of emergency session information.
Background technology
In the existing network evolution, development along with network architecture flattening, and the appearance that multiple high-speed wideband moves access way impels mobile communications network to propose LTE/SAE (Long term Evolution/System Architecture Evolution, Long Term Evolution/system architecture evolution) framework theory of future generation, comprise and make the wireless communication system of evolution that higher transmission rate can be provided, shorter transmission delay, lower cost, support the mobility between the inner connecting system of 3GPP simultaneously, and the mobility between 3GPP connecting system and the non-3GPP connecting system or the like.LTE/SAE further is defined as EPS network (Evolved Packet System, grouping evolution system) according to the standard progress, and the EPS network also as a kind of access means in IMS territory, impels the IMS framework to be able to evolution and development.
3GPP evolved packet system (Evolved Packet system, be called for short EPS) by E-UTRAN (Evolved Universal Terrestrial Radio Access Network, the universal land radio access web of evolution), MME (mobile management unit, Mobility Management Entity), S-GW (gateway, Serving Gateway), P-GW (Packet Data Network GateWay, data network gateway), HSS (home subscriber server, Home Subscriber Server), 3GPP aaa server (3GPP authentication and authorization charging server), PCRF (Policy and Charging RulesFunction, "Policy and Charging Rules Function), reaching other supporting network element device forms.
E-UTRAN is follow-on wireless access network, and higher up-downgoing speed can be provided, lower transmission delay and reliable more wireless transmission.Wherein the main network entity of E-UTRAN is eNodeB.
MME is responsible for mobile management and stores the UE context (such as the UE/ user ID, mobility management states, user security parameters etc.) etc. the chain of command related work for the user distributes temporary mark, is responsible for this user is carried out authentication when UE quarters at this tracing area or this network.
Serving GW (be called for short S-GW), the user plane functions entity is mobile anchor point between EPS system and traditional 3GPP system and the mobile anchor point between the E-UTRAN.S-GW is the accessing gateway equipment that links to each other with E-UTRAN, transmits data between E-UTRAN and P-GW, and is responsible for pending datas such as paging are carried out buffer memory.
PDN GW (being called for short P-GW), the user plane functions entity is responsible for subscriber equipment and is transmitted functions such as data to the access of PDN, between EPS and PDN.User face data is carried out route handle, termination is in the downlink data of the UE of idle state, when the downlink data that mails to UE arrives, initiates paging.The context of management and storage UE is such as IP bearer service parameter and network internal routing iinformation etc.
PDN (Packet Data Network): packet data network is to provide packet-based service network for the user.In this article, PDN is the IMS network.
HSS is a home subscriber server, the information such as user contracting data in management circuit (CS) territory, packet domain (PS) and IMS territory.
PCRF is the "Policy and Charging Rules Function entity, it is by Rx interface and the 1P of operator business network interface, obtain business information, be responsible for initiating IP (Intemet Protocol, Internet protocol) carrying strategic decision-making is as foundation, the deletion of carrying, the Qos of business datum/carrying (Quality of service, and the control of chargeing service quality) etc..In traditional 3GPP network, strategy and charge execution function (Policy and charging enforcement function, be called for short PCEF) be present among the P-GW, PCRF needs only the control that can finish all functions such as comprising QoS corresponding strategies and charging with the P-GW interface.If PCRF is configuration not, QoS corresponding strategies and charging regulation can carry out this locality configuration on PCEF.
Urgent call (Emergency Call) is distinctive a kind of voice service function in the mobile communication system.Even be provided with the restriction exhalation and do not insert under the situation of subscriber identification module (SIM) at portable terminal, as long as in the zone that the mobile network covers, when the user dial emergency numbers as: 110, after 119,911 etc., calling can forward corresponding EC (PSAP) to as police office, fire brigade, first-aid centre etc., thereby provides 24 hours emergency assistance services to the masses.The operation of whole system is finished by the common cooperation of emergency services such as telecom operators and public security, fire-fighting, hospital.
Under the conventional situation, urgent call all is to be placed in circuit (CS) territory, and along with the progressively IPization of network, the PS territory also begins progressively to support emergence call service, and utilizes the IMS system to do call signaling control for emergent session.Current, the emergence call service that utilizes the IMS territory to provide can abbreviate the IMS urgent call as.The IMS urgent call need realize the IP carrying in the EPS connecting system.
The IMS urgent call must by UE resident IMS (IP Multimedia Subsystem, the IP multimedia system) network provides the emergent session business, that is to say, if UE is at ownership place, just provide the emergent session business by ownership IMS network, if UE on visit ground, just provides the emergent session business by visit IMS network.As shown in Figure 1, the network side of IMS emergencycallboxsystem mainly comprises: Proxy Call Session Control Function (Proxy Call Session Control Function, abbreviation P-CSCF), service call conversation control function (Serving Call Session Control Function, abbreviation S-CSCF), emergency call session controlled function (Emergency Call Session Control Function, be called for short E-CSCF) and urgency communication accept center (Public Safety Answering Point, abbreviation PSAP).
Wherein, P-CSCF is used for as request and response between agency forwarding UE and the S-CSCF, adopts Rx interface to be connected with PCRF.S-CSCF is the home service entity of UE, is used to UE that functions such as Emmergency log-on and control of authority are provided.PSAP is the emergency call service center, is responsible for the urgent call of accepted user.
E-CSCF is a new functional entity of introducing in the IMS territory, itself and P-CSCF are arranged in same network (being user's visited network when the user roams), be responsible for to receive from the emergent session of P-CSCF and set up request, and accept center (PSAP) with urgency communication and set up emergent session and be connected.
As Fig. 2, when UE by the EPS network insertion and when dialing the IMS urgent call, concrete carrying is set up with the IMS calling procedure as described below, this flow process is mainly described UE under the situation of unidentified urgent call, the process of setting up of IMS urgent call:
Step 201:UE initiates normally to adhere to request at the EPS network, carries the sign of UE;
MME in the step 202:EPS network carries out authentication and safety certification to UE, and from HSS download user data, obtains IP address or the APN of the P-GW that is used to serve, finds the IP address of P-GW from Dynamic Host Configuration Protocol server according to APN.
Step 203:MME initiates default bearing to P-GW and sets up request, and P-GW is from PCRF download charging and QoS rule, if PCRF does not have configuration, just adopts the local rule that disposes, and sets up request to MME response default bearing.MME sends out radio bearer to eNodeB and sets up request, sets up radio bearer resources, finally finishes the foundation of default bearing.
If UE carries out the session of particular session business, UE can set up dedicated bearer to the P-GW application, and P-GW can set up the dedicated bearer of particular session business for UE, and different QoS and charging regulations is provided.
Step 204:UE need find P-CSCF in this locality before carrying out the IMS session service, and registers at ownership IMS;
Step 205:UE initiates the INVITE call request to P-CSCF, and UE need judge whether it is urgent call when calling out.If urgent call, the positional information that then need in INVITE, carry urgent sign and UE; If can not determine is urgent call, UE just thinks ordinary call, handles by normal call flow.
After step 206:P-CSCF receives the INVITE call request of UE, need judge whether it is emergency call request, if emergency call request is carried out the emergent session request with regard to the E-CSCF that is given to consolidated network and handled.Failing to differentiate for UE is the situation of urgent call, and P-CSCF understands notice UE in the relevant signaling of IMS call this is a urgent call, carries urgent label manner as adopting in the 200OK response.
Judge it is the ordinary call request as if P-CSCF, just by the normal conversation flow processing, the S-CSCF that call request is issued ownership IMS network carries out follow-up session processing.
It is the IMS emergency call request that step 207:P-CSCF judges, the E-CSCF that the INVITE call request is issued same IMS network handles the queued session request.E-CSCF asks the positional information of inquiry UE in the server of position, and finds the routing address of PSAP according to the positional information of UE.
Step 208:E-CSCF issues urgent center P SAP with emergency call request, and PSAP responds this and calls out, and finally sets up the VoIP emergent session of UE and PSAP.
When UE initiates Unidentified IMS urgent call, can adopt default bearing or dedicated bearer to initiate ordinary call at the EPS network, at this moment if UE moves to confined area, variation has taken place in the network cell at place, need carry out will going wrong when the emergent session carrying is switched.
TAU process when the EPS network MME at the UE of being shown in Figure 3 place changes.UIE is just adopting default bearing or other dedicated bearer to carry out the Unidentified IMS urgent call of UE, when UE moves to new TA zone and triggers TAU (Tracking Area Update, regional location upgrades) request, after target MME receives the TAU request, need in step 304, remove to apply for the MME context of former carrying use to old MME.Old MME need confirm whether UE is authenticated by target MME, and returns context response.If target MME does not authenticate UE, just necessarily need the access authentication of execution in step 306, and, UE is carried out access authentication from HSS download user data.This moment, UE was if there is the restriction of access, and will be under an embargo is linked on the target MME, causes the TAU procedure failure, and the ongoing emergent session of UE may cause and may interrupt because of EPS carries to switch.
The handover handoff procedure of EPS network eNodeB (be the base station system of LTE, be also referred to as E-UTRAN) when changing at the UE of being shown in Figure 4 place.UE is just adopting default bearing or other dedicated bearer to carry out the Unidentified IMS urgent call of UE, eNodeB changes when UE moves to new TA zone, UE transmission this moment wireless measurement reports to source eNodeB, and source eNodeB can select a target eNode B to carry switching according to the TA information in the measurement report.But if UE moves to professional limited area, and source eNodeB does not know that the session of carrying is an emergent session, source eNodeB just can initiatively not initiate the switching of default bearing or dedicated bearer to target eNode B, and can notify MME to discharge original acquiescence or dedicated bearer, will cause the interruption of emergent session like this.
In the scene of Fig. 4, even source eNodeB initiates the carrying handoff request to target eNode B, target eNode B judges equally whether UE is professional limited in this zone, if professional limited, also can initiatively refuse the handover request of default bearing or dedicated bearer, cause the interruption of emergent session.
Therefore, need to seek a kind of method of when the IMS emergent session, emergency call information being notified the EPS bearer network, need when solution moves to confined area because of UE to carry out the switching of default bearing or dedicated bearer, cause the problem of emergent session carrying handoff failure.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method and system that obtains emergency session information, to guarantee the continuity and the voice quality of emergent session, has avoided the problem of emergent session handoff failure.
For solving the problems of the technologies described above, the invention provides a kind of method of obtaining emergency session information, this method comprises:
(a) after user equipment (UE) is received the emergent session indication that IP multimedia system IMS network issues, initiatively send the emergency bearing indication information to evolved packet system EPS network, being used to indicate the employed carrying of current sessions is emergency bearing;
(b) described EPS network receives described emergency bearing indication information, and employed carrying is an emergency bearing according to described emergency bearing indication information identification current sessions.
Further, in the step (a), described UE sends bearer update or regional location renewal TAU request according to described emergent session indication to described EPS network, carry described emergency bearing indication information in the described request, the network based described request of EPS described in the step (b) is carried out bearer update or regional location renewal process, and the employed carrying of identification current sessions is an emergency bearing in the process of carrying out the renewal of bearer update or regional location.
Further, described emergency bearing indication information comprises urgent sign or urgent Qos parameter, in the step (b), when carrying out the renewal of bearer update or regional location, the base station eNodeB at described EPS networking is mapped as the wireless emergency qos parameter with urgent qos parameter, and, wherein carry wireless emergency Qos parameter to UE transmission Radio Resource connection reconfiguration message.
Method as claimed in claim 3 is characterized in that: in the step (b), carry out in the bearer update process, described urgent qos parameter is by the data network gateway P-GW decision of EPS network.
Method as claimed in claim 3 is characterized in that: in the step (a), described TAU request is to send to the mobile management unit MME's of EPS network; In the step (b), in described TAU process, MME initiatively initiates the bearer update request after receiving described TAU request, wherein carries the urgent qos parameter or the urgent sign that comprise the local configuration of MME.
Further, in the step (a), described TAU request is to send to the MME's of EPS network; In the step (b), in described TAU process, it is emergency bearing that described MME adopts the described carrying of S1 signaling message informing base station eNodeB.
For solving the problems of the technologies described above, the present invention also provides a kind of system that obtains emergency session information, and this system comprises subscriber equipment and EPS network, wherein,
The emergent session indication that described subscriber equipment is used for sending according to the IMS network sends the emergency bearing indication information to described EPS network, and being used to indicate the employed carrying of current sessions is emergency bearing;
Described EPS network is used to receive the emergency bearing indication information that subscriber equipment sends, and employed carrying is an emergency bearing according to described emergency bearing indication information identification current sessions.
Further, described emergency bearing indication information is to send to described EPS network by described subscriber equipment to bearer update or the regional location update request that described EPS network sends; Described EPS network is used for carrying out bearer update or regional location renewal process according to described request.
Further, described emergency bearing indication information comprises urgent sign or urgent Qos parameter, described EPS network comprises base station eNodeB, be used for urgent qos parameter is mapped as the wireless emergency qos parameter, and to UE transmission Radio Resource connection reconfiguration message, wherein carry wireless emergency Qos parameter, described UE also is used to receive described unlimited resources and connects reconfiguration message.
Further, described bearer update request also comprises the bearer update parameter, wherein the bearer update parameter is used for the indication increase or revises carrying, described eNodeB also is used for being carried as the emergency wireless bearing resource according to bearer update parameter modification Radio Resource, or sets up the emergency wireless bearing resource for emergency bearing.
Compared to prior art, in the inventive method and the system, after UE receives the urgent call indication of IMS network, emergency bearing type by related procedure notice EPS network, making the MME of EPS network and eNodeB discern described carrying is the emergency bearing that is used for the IMS emergent session, when carrying out regional location renewal TAU or handover switching, emergency bearing will be switched to objective network, has greatly ensured the continuity of emergent session business and the high-quality and the high reliability of voice like this.
Description of drawings
Fig. 1 is that UE inserts the system architecture schematic diagram that the EPS network is realized the IMS urgent call.
Fig. 2 is the flow chart that UE realizes the IMS emergent session in the prior art in the EPS carrying.
Fig. 3 is the scene schematic diagram of emergent session carrying handoff failure when UE carries out the TAU process in the prior art.
Fig. 4 is the scene schematic diagram of emergent session carrying handoff failure when UE carries out the Handover process in the prior art.
Fig. 5 is the schematic diagram that embodiment of the invention UE initiatively initiates the bearer update flow process;
Fig. 6 is the schematic diagram that embodiment of the invention UE initiatively initiates urgent TAU flow process.
Fig. 7 is the method schematic diagram that the present invention obtains emergency session information.
Embodiment
In the 3GPP network, when adopting the IMS network, UE carries out the IMS emergent session when professional, and UE need judge whether it is urgent call, for example can relatively discern by emergency numbers of dialing and the emergency numbers that UE stores.If UE can't discern, it just makes a call to set up by the normal call flow process and asks, after the IMS network is received setup requests, needing to differentiate is urgent call or normal call, if urgent call, the IMS network can continue emergency call request to be handled, and finally sets up the IMS emergent session of UE and urgent center P SAP, and notice UE is an emergent session in response message simultaneously.
The main thought that EPS network of the present invention obtains the method and system of emergency session information is after UE receives the emergent session indication of IMS network notice, the carrying that UE proactive notification EPS network uses is the emergency bearing that is used for the IMS emergent session, to avoid when UE is carrying out Unidentified IMS emergent session, if UE moves to confined area, cause the problem of emergent session carrying handoff failure, to guarantee the continuity and the voice quality of emergent session.
As shown in Figure 7, the present invention's method of obtaining emergency session information comprises:
(a) after user equipment (UE) is received the emergent session indication of IMS network notice, send the emergency bearing indication information to the EPS network, being used to indicate the employed carrying of current sessions is the emergency bearing that is used for emergent session;
(b) described EPS network receives described emergency bearing indication information, and employed carrying is an emergency bearing according to described emergency bearing indication information identification current sessions.
Among the present invention, after UE receives the urgent call indication of IMS network, initiatively initiate bearer update or urgent TAU flow process, the described carrying of notice EPS network is an emergency bearing, like this when UE moves to confined area, just can realize that emergent session switches, guarantee the continuity and the voice quality of emergent session, avoid the problem of emergent session handoff failure.
Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
First embodiment
First embodiment of the invention is seen shown in Figure 5, and main thought is after UE receives that the IMS network notifies this to be the message of IMS emergent session, initiatively to P-GW application bearer update, carries urgent qos parameter and urgent sign.MME and/or eNodeB are emergency bearings according to urgent QoS rule or urgent identification.Step is as follows:
Fig. 5 initiatively initiates the flow process of bearer update after having described the urgent call indication that UE receives service announcements to the EPS network.As shown in Figure 5, the bearer update flow process comprises following steps:
After step 501:UE receives the emergent session sign of service announcements, initiatively initiate the bearing resource update request to MME, carry the sign of UE, current bearing identification (LBI, Linked Bearer D), be used to indicate current carrying be the emergency bearing type urgent sign, need E-QoS (urgent QoS) parameter and the bearer update parameter revised, wherein the bearer update parameter is used for indication increases or revises carrying;
Step 502:MM initiates the bearing resource update request to S-GW, carries the sign of UE, current carrying indication, urgent sign, E-QoS (urgent QoS) parameter and bearer update parameter; LBI is used to indicate the bearing link of modification.
Step 503:S-GW initiates the bearing resource update request to P-GW, carries the sign of UE, current carrying indication, urgent sign, E-QoS (urgent QoS) parameter and bearer update parameter; LBI is used to indicate the bearing link of modification.
Step 504:P-GW and PCRF are mutual, for the suitable PCC rule of new emergency bearing application of the carrying or the interpolation of current modification, carry urgent sign.
The urgent sign of PCRF basis will promptly be chargeed and the QoS rule downloading is given P-GW.If do not dispose PCRF, P-GW is provided with urgent charging and QoS rule according to this locality configuration.
Bearer update parameter indication is to adopt different processing methods when revising carrying or adding carrying, below is introduced respectively:
The flow process of bearing modification is an A flow process shown in Figure 5:
Step 505a:P-GW accepts the request of bearing modification, and P-GW is that QoS is the emergency bearing of urgent QoS with this bearing modification.
P-GW initiates the bearer update request to S-GW, carries current carrying indication LBI, urgent sign, urgent qos parameter etc., and LBI is used to indicate the bearing link of modification;
Step 506a:S-GW initiates the bearer update request to MME, carries current carrying indication LBI, urgent sign, urgent qos parameter etc., and LBI is used to indicate the bearing link of modification; MME is an emergency bearing according to urgent sign or urgent qos parameter differentiation carrying.
Step 507a:MME initiates the bearing modification request to eNodeB, carries current carrying indication LBI, urgent sign, urgent qos parameter etc., and notice eNodeB revises radio bearer resources.ENodeB is an emergency bearing according to urgent sign or urgent qos parameter differentiation carrying.
Step 508a:eNodeB is mapped as the wireless emergency qos parameter with urgent qos parameter, sends out Radio Resource to UE then and connects reconfiguration message, brings UE with wireless emergency Qos parameter, revises Radio Resource and is carried as the emergency wireless bearing resource.
Step 509a: after radio bearer modification was finished, eNodeB finished to the carrying of MME response modification.
Step 510a:MME sends out the bearer update response to S-GW after receiving the bearing modification response of eNodeb, and the notice bearer update is finished;
Step 511a:S-GW sends out the bearer update response to P-GW, and the notice bearer update is finished;
The flow process that emergency bearing is set up is the B flow process as shown in Figure 5:
Step 505b:P-GW accepts the bearer update request, and according to the indication of adding carrying, P-GW is that emergent session establishment QoS is the emergency bearing of urgent QoS.
P-GW initiates special-purpose emergency bearing to S-GW and sets up request, carries the sign of UE, current bearing identification LBI, urgent sign, urgent qos parameter etc.;
Step 506b:S-GW initiates special-purpose emergency bearing to MME and sets up request, carries sign, the emergency bearing of UE and indicates LBI, urgent sign, urgent qos parameter etc.; MME is that emergency bearing distributes the EPS bearing identification, and to differentiate the carrying of setting up according to urgent sign or urgent qos parameter be emergency bearing.
Step 507b:MME initiates carrying to eNodeB and sets up request, carries EPS bearing identification, urgent sign, urgent qos parameter etc., and notice eNodeB is that emergency bearing is set up radio bearer resources.ENodeB is an emergency bearing according to urgent sign or urgent qos parameter differentiation carrying.
Step 508b:eNodeB is mapped as the wireless emergency qos parameter with urgent qos parameter, sends out Radio Resource to UE then and connects reconfiguration message, brings UE with wireless emergency Qos parameter, for emergency bearing is set up the emergency wireless bearing resource.
Step 509b: after radio bearer was set up and finished, eNodeB returned carrying to MME and sets up response, and notice MME radio bearer is set up.
After step 510b:MME receives that response is set up in the carrying of eNodeB, send out establishment emergency bearing response message to S-GW, the notice emergency bearing is created;
Step 511b:S-GW sends the emergency bearing response message to P-GW, and the notice emergency bearing is created;
Step 512: optionally, if PCRF disposes, P-GW returns the affirmation message that emergency bearing has been revised or increased to PCRF.
For realizing the above first embodiment method, the present invention also provides a kind of EPS network to obtain the system of emergency session information, and this system comprises subscriber equipment and EPS network, wherein,
The emergent session indication that described user equipment (UE) is used for sending according to the IMS network sends the bearer update request to described EPS network, wherein carries the emergency bearing indication information, and being used to indicate the employed carrying of current sessions is emergency bearing;
The indication of described emergent session is that the IMS network is judged when the session that will set up is emergent session and sent to subscriber equipment;
The emergency bearing indication information can comprise urgent sign and urgent Qos parameter, and it is the emergency bearing type that urgent sign is used to indicate current carrying.
Described bearer update request is also carried the sign of UE, current bearing identification LBI, bearer update parameter except that carrying the emergency bearing indication information, wherein the bearer update parameter is used for the indication increase or revises carrying.
Described EPS network is used to receive the bearer update request that subscriber equipment sends, and carries out the bearer update process, and is emergency bearing according to the employed carrying of described emergency bearing indication information identification session.
Described EPS network comprises S-GW, P-GW, MME and eNodeB, and being used for carrying according to emergency bearing indication information identification current sessions is emergency bearing;
ENodeB also is used for urgent qos parameter is mapped as the wireless emergency qos parameter, and send out Radio Resource to UE and connect reconfiguration message, wherein carry wireless emergency Qos parameter, also be used for being carried as the emergency wireless bearing resource, or set up the emergency wireless bearing resource for emergency bearing according to bearer update parameter modification Radio Resource.
Described UE also is used to receive described unlimited resources and connects reconfiguration message.
Second embodiment
Second embodiment of the invention is seen shown in Figure 6, and main thought is after UE receives that the IMS network notifies this to be the message of IMS emergent session, initiatively initiates the TAU process to MME, carries urgent sign and current bearing identification.MME is an emergency bearing according to promptly discerning, and MME can initiate the emergency bearing renewal process then, and it is emergency bearing that urgent sign of eNodeB basis or urgent qos parameter are discerned.Optionally, MME also can not initiate emergency bearing and upgrade, and directly by S1 signaling eNodeB, carries urgent sign, and eNodeB is an emergency bearing according to promptly discerning.
Fig. 6 initiatively initiates the flow process of urgent TAU to the EPS network after having described the urgent call indication that UE receives the IMS service announcements.As shown in Figure 6, urgent TAU flow process comprises following steps:
After step 601:UE receives the emergent session sign of service announcements, triggered the initiation condition of urgent TAU;
Step 602:UE initiatively initiates the TAU request by eNodeB to MME, carry UE sign, EPS Bearer Id, to be used to indicate current carrying be the urgent sign of emergency bearing type.It is emergency bearing that MME differentiates the carrying that is used for current sessions according to urgent sign;
Optional flow process 1:
Step 603:MME initiatively initiates the emergency bearing update request to S-GW after receiving urgent TAU request, carries E-QoS (urgent QoS) parameter of the sign of UE, current carrying indication, urgent sign, MME configuration;
Step 604:S-GW initiates the emergency bearing update request to P-GW, carries the sign of UE, current carrying indication, urgent sign, E-QoS (urgent QoS) parameter etc.;
Step 605:P-GW and PCRF are mutual, for the suitable PCC rule of the modification application of current carrying, carry urgent sign.PCRF gives P-GW according to urgent sign with the urgent charging and the QoS rule downloading of this locality.If do not dispose PCRF, P-GW is provided with urgent charging and QoS rule according to this locality configuration.
Step 606: step 606 is consistent with A flow process among Fig. 5.P-GW notice MME, eNodeB carry out the emergency bearing renewal, carry urgent qos parameter and urgent sign, and eNodeB can be an emergency bearing according to the carrying of urgent sign or urgent qos parameter differentiation renewal;
Optional flow process 2:
Step 607: if do not carry out above step 603 to 606, then MME can pass through the S1 signaling interface, send out S1 signaling message to eNodeB, carry EPS Bear ID carrying indication and urgent sign, it is emergency bearing that eNodeB can differentiate this carrying according to urgent sign, and replys S1 signaling response message to MME;
Step 608:MME responds TAU acceptance response message to UE, and the TA tabulation is handed down to UE, and urgent TAU flow process is finished.
For realizing the above second embodiment method, the present invention also provides a kind of EPS network to obtain the system of emergency session information, and this system comprises subscriber equipment, IMS network and EPS network, wherein,
The IMS network is used to set up session, if emergent session also is used for sending the emergent session indication to subscriber equipment;
Described user equipment (UE) is used to receive the emergent session indication that the IMS network sends, also be used for upgrading (TAU) request to position, described EPS network sending zone according to described emergent session indication, wherein carry the emergency bearing indication information, being used to indicate the employed carrying of current sessions is the carrying of emergency type;
The emergency bearing indication information can comprise the combination of urgent sign and urgent Qos parameter, and it is the emergency bearing type that urgent sign is used to indicate current carrying.
Described TAU request is also carried parameters such as the sign of UE, current bearing identification LBI except that carrying the emergency bearing indication information.
Described EPS network is used to receive the TAU request that subscriber equipment sends, and carries out the TAU process, and is emergency bearing according to the employed carrying of described emergency bearing indication information identification session.
Described EPS network comprises S-GW, P-GW, MME and eNodeB, and being used for carrying according to emergency bearing indication information identification current sessions is emergency bearing;
ENodeB also is used for urgent qos parameter is mapped as the wireless emergency qos parameter, and send out Radio Resource to UE and connect reconfiguration message, wherein carry wireless emergency Qos parameter, also be used for being carried as the emergency wireless bearing resource according to bearer update parameter modification Radio Resource.
When if the EPS network is carried out the TAU process, by S1 signaling interface message transfer, then the EPS network comprises MME and eNodeB, described MME also is used to receive the TAU request that subscriber equipment sends, discerning the carrying that is used for current sessions according to the emergency bearing indication information is emergency bearing, also be used for sending S1 signaling message to eNodeB, wherein carry current bearing identification and urgent sign by the S1 signaling interface.
Described eNodeB also is used to receive the S1 signaling message that MME sends, and discerning current carrying according to urgent sign is emergency bearing.
Described UE also is used to receive described unlimited resources and connects reconfiguration message.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
In the inventive method and the system, after UE receives the urgent call indication of IMS network, emergency bearing type by related procedure notice EPS network, making the MME of EPS network and eNodeB discern described carrying is the emergency bearing that is used for the IMS emergent session, like this when carrying out regional location renewal TAU or handover switching, emergency bearing will be switched to objective network, has greatly ensured the continuity of emergent session business and the high-quality and the high reliability of voice.
Claims (10)
1. a method of obtaining emergency session information is characterized in that, this method comprises:
(a) after user equipment (UE) is received the emergent session indication that IP multimedia system IMS network issues, initiatively send the emergency bearing indication information to evolved packet system EPS network, being used to indicate the employed carrying of current sessions is emergency bearing;
(b) described EPS network receives described emergency bearing indication information, and employed carrying is an emergency bearing according to described emergency bearing indication information identification current sessions.
2. the method for claim 1, it is characterized in that: in the step (a), described UE sends bearer update or regional location renewal TAU request according to described emergent session indication to described EPS network, carry described emergency bearing indication information in the described request, the network based described request of EPS described in the step (b) is carried out bearer update or regional location renewal process, and the employed carrying of identification current sessions is an emergency bearing in the process of carrying out the renewal of bearer update or regional location.
3. method as claimed in claim 1 or 2, it is characterized in that: described emergency bearing indication information comprises urgent sign or urgent Qos parameter, in the step (b), when carrying out the renewal of bearer update or regional location, the base station eNodeB at described EPS networking is mapped as the wireless emergency qos parameter with urgent qos parameter, and, wherein carry wireless emergency Qos parameter to UE transmission Radio Resource connection reconfiguration message.
4. method as claimed in claim 3 is characterized in that: in the step (b), carry out in the bearer update process, described urgent qos parameter is by the data network gateway P-GW decision of EPS network.
5. method as claimed in claim 3 is characterized in that: in the step (a), described TAU request is to send to the mobile management unit MME's of EPS network; In the step (b), in described TAU process, MME initiatively initiates the bearer update request after receiving described TAU request, wherein carries the urgent qos parameter or the urgent sign that comprise the local configuration of MME.
6. method as claimed in claim 3 is characterized in that: in the step (a), described TAU request is to send to the MME's of EPS network; In the step (b), in described TAU process, it is emergency bearing that described MME adopts the described carrying of S1 signaling message informing base station eNodeB.
7. system that obtains emergency session information, it is characterized in that: this system comprises subscriber equipment and EPS network, wherein,
The emergent session indication that described subscriber equipment is used for sending according to the IMS network sends the emergency bearing indication information to described EPS network, and being used to indicate the employed carrying of current sessions is emergency bearing;
Described EPS network is used to receive the emergency bearing indication information that subscriber equipment sends, and employed carrying is an emergency bearing according to described emergency bearing indication information identification current sessions.
8. system as claimed in claim 7 is characterized in that: described emergency bearing indication information is to send to described EPS network by described subscriber equipment to bearer update or the regional location update request that described EPS network sends; Described EPS network is used for carrying out bearer update or regional location renewal process according to described request.
9. as claim 7 or 8 described systems, it is characterized in that: described emergency bearing indication information comprises urgent sign or urgent Qos parameter, described EPS network comprises base station eNodeB, be used for urgent qos parameter is mapped as the wireless emergency qos parameter, and to UE transmission Radio Resource connection reconfiguration message, wherein carry wireless emergency Qos parameter, described UE also is used to receive described unlimited resources and connects reconfiguration message.
10. system as claimed in claim 9, it is characterized in that: described bearer update request also comprises the bearer update parameter, wherein the bearer update parameter is used for the indication increase or revises carrying, described eNodeB also is used for being carried as the emergency wireless bearing resource according to bearer update parameter modification Radio Resource, or sets up the emergency wireless bearing resource for emergency bearing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910005198A CN101800958A (en) | 2009-02-10 | 2009-02-10 | Method and system for obtaining emergency session information |
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| CN200910005198A CN101800958A (en) | 2009-02-10 | 2009-02-10 | Method and system for obtaining emergency session information |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102217341A (en) * | 2011-05-31 | 2011-10-12 | 华为技术有限公司 | An establishing method of a none voice emergency service conversation, a device and a system thereof |
| WO2013067907A1 (en) * | 2011-11-07 | 2013-05-16 | 中兴通讯股份有限公司 | Method, device and system for terminal call processing |
| CN114286337A (en) * | 2018-08-13 | 2022-04-05 | 华为技术有限公司 | Method and device for distributing EBI |
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2009
- 2009-02-10 CN CN200910005198A patent/CN101800958A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102217341A (en) * | 2011-05-31 | 2011-10-12 | 华为技术有限公司 | An establishing method of a none voice emergency service conversation, a device and a system thereof |
| WO2011157148A2 (en) * | 2011-05-31 | 2011-12-22 | 华为技术有限公司 | Method, device and system for non voice emergency service session establishment |
| WO2011157148A3 (en) * | 2011-05-31 | 2012-04-26 | 华为技术有限公司 | Method, device and system for non voice emergency service session establishment |
| CN102217341B (en) * | 2011-05-31 | 2014-04-30 | 华为技术有限公司 | An establishing method of a none voice emergency service conversation, a device and a system thereof |
| WO2013067907A1 (en) * | 2011-11-07 | 2013-05-16 | 中兴通讯股份有限公司 | Method, device and system for terminal call processing |
| CN114286337A (en) * | 2018-08-13 | 2022-04-05 | 华为技术有限公司 | Method and device for distributing EBI |
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Application publication date: 20100811 |