CN101304406B - Method for managing conversation connection as well as apparatus and system - Google Patents
Method for managing conversation connection as well as apparatus and system Download PDFInfo
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- CN101304406B CN101304406B CN 200710074465 CN200710074465A CN101304406B CN 101304406 B CN101304406 B CN 101304406B CN 200710074465 CN200710074465 CN 200710074465 CN 200710074465 A CN200710074465 A CN 200710074465A CN 101304406 B CN101304406 B CN 101304406B
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Abstract
The invention discloses a management method, a device and a system of conversation connection; wherein, the management method of the conversation connection includes the following steps: an endpoint of the conversation connection detects that the conversation connection is passively stopped; the endpoint of the conversation connection informs a correlative management distribution server to carried out a rescission treatment; the management device of the conversation connection comprises a detection module for a conversation connection state, which is used for detecting the state events of the conversation connection and recognizing the passive stop of the conversation connection, and an informing module for the conversation connection state, which is used for informing the state events of the passive stop of the conversation connection to the management distribution server which correlates with the conversation connection; the management system of the conversation connection comprises an endpoint device of the conversation connection and the management distribution server.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of management method of session connection and device, system.
Background technology
DHCP (Dynamic Host Configuration Protocol, DHCP) provides the mechanism of a kind of dynamic assigned ip address and configuration parameter, and it is mainly used in large network environment and the relatively more difficult place of configuration.According to this agreement, Dynamic Host Configuration Protocol server can be client computer assigned ip address automatically, some is also uncorrelated with the IP agreement for the configuration parameter of appointment, but because the layoutprocedure of DHCP can realize automatically, all configuration informations can be by the Dynamic Host Configuration Protocol server unified management, not only can the distributing IP address, but also can dispose other a large amount of information, these configuration parameters are so that the compunication on the network becomes convenient and easily realization, and therefore, DHCP is widely used now.
DHCP generally adopts the Client/Server pattern, by user end to server configuration application (parameters such as IP address, subnet mask, default gateway that comprise distribution) is proposed, server returns corresponding configuration information according to strategy, and the DHCP message adopts UDP to encapsulate.
Defined member mainly comprises in the DHCP agreement:
DHCP Server: the administration configuration server, the DHCP service is provided, according to the request of client, be client distributing IP address or other network parameters, general existence form comprises: router, three-tier switch or special Dynamic Host Configuration Protocol server;
DHCP Relay: the equipment of transmission of dhcp message between DHCP Server and DHCP Client, for the server in the different segment and client can transmit the DHCP message, it also provides secure option simultaneously; DHCP Relay provides a kind of transparent transmission mechanism of broadcasting packet, for not providing forwarding capability by the dhcp broadcast message of switch, so that Dynamic Host Configuration Protocol server can provide service for the dhcp client at its this network segment not, Relay is after receiving the DHCP request message that client is sent, the interface IP address of receiving this message is inserted message, then transmit, Dynamic Host Configuration Protocol server just can determine according to the interface IP address in the message of receiving needs distribute the IP address of which subnet like this;
DHCP Client: utilize the DHCP agreement to obtain the main frame of configuration parameter (as: IP address) in the network, namely client host or other can obtain the three-layer equipment of IP address.
IP session (IP session) has represented the network insertion session connection related with a subscriber's (Subscriber) IP address, IP Session and point-to-point session (PPP Session) equity, be based on the session connection of IP, IP Session is usually in IP edge device (BNG/BRAS) termination, and namely IPSession is that a session (session) of setting up between subscriber terminal equipment and IP edge device is connected.The IP address of Subscriber is crucial part in the parameter of identification IP Session and the verification process, the IP address is generally by DHCP management and configuration, be that the application of the IP Session IP address of using is in the Dynamic Host Configuration Protocol server application, IP Session is used for the activity of user access network is managed such as accounting management, condition managing etc.Subscriber (Subscriber) is the role who contracts with Virtual network operator, the client needs access network, need to contract with operator, finally become a subscriber, as obtain a network access user name, a subscriber can comprise a plurality of IP sessions, i.e. a plurality of IP sessions are that same subscriber sets up.
The process of IP Session generally includes foundation or the generation of Session, and Session keeps or state detection, the termination of Session.
Wherein, the termination of IP Session can be divided into initiatively (non-passive) termination and passive termination.
The situation of IP Session active termination comprises: the address rental period that DHCP distributes expires, and Dynamic Host Configuration Protocol server is initiatively regained the address or discharged configuration; Perhaps IP session client initiatively discharges the address, and for example DHCP client carries out address release by sending DHCP RELEASE message.
The situation of the passive termination of IP Session comprises: IP Session survival mechanisms (Keep-alive mechanism) detects IP session and has no progeny and trigger the termination of IP session, the IP session that authentication and authorization charging server triggers stops, as the pre-paid subscribers expense exhaust stop the service, the termination that network management triggers, the carrying link of session connection or the termination of path down trigger are such as the termination that detects link down trigger by OAM mechanism etc.
During IP Session active termination, DHCP Server can be known the termination event, thereby can discharge address resource; But, during the passive termination of IP Session, because DHCP Server can't know the termination event, therefore can't discharge relevant IP resource, can cause the wasting of resources, and DHCP Server can't notify upper layer application server (for example: location server CLF, strategic server, resource management server) Session to stop owing to can't know the Session state of connection.
Summary of the invention
In view of the existing problem of above-mentioned prior art, the purpose of the embodiment of the invention is, a kind of management method of session connection and device, system, when solving the passive termination of session connection, the administration configuration server can't in time be known the problem of this termination event, thereby removes in time processing, such as resources such as releasing IP addresses, the termination that the notice application server carries out session connection, the utilization ratio of raising resource.
Above-mentioned purpose is to be achieved through the following technical solutions:
The embodiment of the invention provides a kind of management method of session connection, comprising:
The end-point detection of session connection is to the passive termination of IP session, and described passive termination refers to not to be the termination that initiatively triggers by session connection client and administration configuration server;
The end points of described session connection generates and stops notification message, sends to relevant administration configuration server, so that described configuration server is removed processing; The sign that comprises described IP session in the described termination notification message;
Described administration configuration server is removed to process and comprised: described administration configuration server discharges the IP address of described IP session;
The end points of described session connection comprises: wideband network gateway, or Broadband Remote Access Server, or IP edge device;
Described passive termination comprises at least a in the following situations:
The termination that the survival mechanisms of described session connection triggers, the termination that authentication and authorization charging server triggers, the termination that network management system triggers, the link of carrying session connection or the termination of path down trigger.
The embodiment of the invention also provides a kind of management system of session connection, comprising:
The session connection end-point devices is used for managing described IP session, surveys the termination event of described IP session, identifies the passive termination of described IP session, notifies described IP session relevant administration configuration server described passive termination; Also be used for after described session connection end points detects the IP session termination, notification authentication mandate accounting server carries out corresponding charging to be processed;
The administration configuration server is used for managing the configuration of described IP session, receives the passive termination notice that comes from described session connection end points, resolves described passive termination notice, and releasing IP addresses is at interior related resource; Also be used for notifying application server with the passive termination message of described IP session;
Application server is used for according to the request of described administration configuration server, discharging the resource relevant with described IP session after passive termination occurs in described IP session;
Authentication and authorization charging server is used for after described IP session stops, and according to the request of described session connection end points, carries out corresponding charging and processes;
The end points of described session connection comprises: wideband network gateway, or Broadband Remote Access Server, or IP edge device;
Described passive termination refers to not to be that the termination that initiatively triggers by session connection client and administration configuration server, described passive termination comprise at least a in the following situations:
The termination that the survival mechanisms of described session connection triggers, the termination that authentication and authorization charging server triggers, the termination that network management system triggers, the link of carrying session connection or the termination of path down trigger.
Can be found out by the technical scheme that the invention described above embodiment provides, the embodiment of the invention provides a kind of management method of session connection and device, system, solved when the passive termination of session connection, the administration configuration server can't in time be known the problem of this termination event, thereby can in time remove processing, such as resources such as releasing IP addresses, improve the utilization ratio of resource.
Description of drawings
Fig. 1 is for realizing the system architecture diagram of IP session;
Fig. 2 is the process chart of the described passive termination of the embodiment of the invention;
Fig. 3 is the schematic flow sheet of the embodiment of the invention one;
Fig. 4 is the schematic flow sheet of the embodiment of the invention two;
Fig. 5 is the non-passive termination process schematic diagram of system of the present invention;
Fig. 6 is the described device schematic diagram of the embodiment of the invention;
Fig. 7 is the described system schematic of the embodiment of the invention;
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated.
Accompanying drawing 2 is the main flow chart of the described method of the embodiment of the invention, and when passive termination occured in the IP session, IP session connection end points can carry out following steps proactive notification administration configuration server (for example Dynamic Host Configuration Protocol server) and discharge configuration:
Described session connection end points comprises: wideband network gateway (Broadband Network Gateway, BNG), or Broadband Remote Access Server (Broadband Remote Access Server, BRAS), or IP edge device (IP Edge device), and other have the equipment of session connection endpoint functionality; The described method that detects passive termination can be the termination event that described session connection end points detects session connection, then be passive termination and non-passive termination according to Identification of events, passive termination refers to not to be the termination that initiatively triggers by session connection client and administration configuration server, but the termination of non-active triggering, for example: utilize the survival mechanisms (Keep-alive mechanism) of session connection to detect the termination that the triggering session of having no progeny in the session connects; The session connection that authentication and authorization charging server triggers stops, and exhausts the termination that stops to serve and trigger such as the pre-paid subscribers expense; The termination that network management system triggers; Interrupt and the termination of triggering in link or the path of carrying session connection, as detect the termination of link down trigger by OAM mechanism.
After step 203, configuration management server are received described termination notification message, resolve the termination notification message of receiving, remove processing, for example: the configuration of releasing session join dependency or resource, relevant configuration or resource comprise the IP address.
Optional step 204, configuration management server are constructed new notification message according to the termination notification message parameter of receiving, stop notification message such as session connection, send described message to application server, the termination that the notice application server carries out session connection.Described application server comprises on-position associated server, strategic server, resource management server etc.Described notification message can be the Indication message that meets the message format of DIAMTER or snmp protocol, wherein, the sign that should comprise at least session connection, such as the IP address, described application server carries out termination according to discharging Indication message, such as on-position related information or the strategy of strategic server deletion session connection or the resource that the connection of resource management server releasing session takies etc. of on-position associated server deletion session connection.
In sum, configuration management server receives that the notice of session connection termination or the releasing processing of indication comprise that configuration management server discharges self-administered resource or configuration, such as the IP address etc., further can comprise the termination that configuration management server notice application server carries out session connection.
The below is specifying of the embodiment of the invention.
Embodiment one: passive termination notification message adopts DHCP Release message, and session connection is IP session (IP session), and the administration configuration server is Dynamic Host Configuration Protocol server, and as shown in Figure 3, concrete steps are as follows:
Step 301, session connection end-point detection arrive the IP session of appointment by passive termination;
Session connection end points (such as BNG, BRAS or IP Edge) detects the passive termination of IP Session of appointment, for example: the session connection end points detects IP Session by IP Session Keep-alive mechanism and interrupts, perhaps the manager is by the IP Session of management interface in session connection end points termination appointment, and perhaps aaa server stops the IP session of appointment because the pre-paid subscribers expense has used up.
In described step 302, preferred session connection end points has DHCP Relay or DHCP PROXY function, DHCP Relay or DHCP PROXY can preserve the part relevant information of IP Session when IP Session sets up, such as the IP address of IP Session, the address information of address assignment rental period, Dynamic Host Configuration Protocol server address, IPSession client etc.The session connection end points can be according to the part relevant information structure DHCP Release message of the IP Session of described preservation, and concrete message format can be referring to the DHCP consensus standard, such as RFC 2131.
In addition, in the described step 302, because DHCP Release message is not asked response mechanism, therefore can not guarantee whether resource discharges certain successful, if need to confirm to discharge successfully, the session connection end points can inquire about by the rental period (whether (RFC 4388) mechanism inspection address resource discharges successfully.
Step 303, Dynamic Host Configuration Protocol server are received described DHCP Release message, resolve this message after, according to the content of this message, remove processing, for example: releasing IP addresses; If there is application server, Dynamic Host Configuration Protocol server can also notify application server to carry out the termination of session connection, for example send session connection to application server and stop notification message, the notice associated application servers is carried out the session connection termination, connects the resource that takies etc. to the strategy of session connection configuration or releasing session such as the on-position related information of deletion session connection or deletion;
Step 304, session connection end points generate charging and stop message (Accounting Stop), then this message are sent to accounting server (aaa server);
Step 305, after aaa server receives that charging stops message, stop the charging to current IP Session, judge whether last Session of specified subscribers of IP Session that current generation stops, if and have an application server, then send subscriber's indication notification message that rolls off the production line to application server, require application server to stop all session connections of subscriber, the resource that takies such as the collocation strategy of all session connections of the on-position related information of all session connections of on-position associated server deletion subscriber or strategic server deletion subscriber or all session connections that resource management server discharges the subscriber; Here, aaa server need to stop by charging (Accounting Stop) message and finds subscriber's profile, subscriber's profile comprises subscriber's CAMEL-Subscription-Information and subscriber's parameter, such as subscriber's title, password etc., can be according to IP address or MAC Address or LLID searching; After aaa server finds charging to stop subscriber profile corresponding to (Accounting Stop) message, the structure subscriber indication notification message that rolls off the production line, send to application server, subscriber's indication notification message that rolls off the production line comprises and is not limited only to DIAMTER, snmp message, aaa server subscriber profile parameter and charging stop (Accounting Stop) message, with reference to the messaging protocol structure subscriber indication notification message that rolls off the production line, subscriber's indication notification message that rolls off the production line comprises subscriber identification (such as subscriber's title) at least or/and subscriber's IP address.
Step 306, session connection end points are removed session connection.
The session connection end points is removed the local configuration data of IP session, such as the address binding table, stops Keep-alive timer etc.
Step 304,305 is optional step, need to be access via telephone line such as the subscriber according to actual deployment needs whether, may not need.
Step 302 and 304 does not have the precedence requirement, and step 304 can be before step 302.
Embodiment two: passive termination notification message adopts the message format that meets DIAMTER or snmp protocol.
See also accompanying drawing 4, step 401 in the present embodiment is substantially similar with the concrete steps of above-described embodiment 1 to step 406, difference is when detecting the situation of passive termination, the abnormal end notification message that the session connection end points generates adopts the message format that meets DIAMTER or snmp protocol, be that the session connection end points is removed processing by snmp protocol or DIAMTER notice of settlement administration configuration server, such as the address that discharges the IP session etc.
Of particular note, in the implementation procedure of the specific embodiment of the invention, the session connection end points also can be removed processing by other agreements or interface notice administration configuration server, and the I P address that connects such as releasing session etc. are to realize that the object of the invention is limited.
For example, if Dynamic Host Configuration Protocol server is the home server that is integrated in session connection end points inside, be that Dynamic Host Configuration Protocol server is to realize in same equipment with the session connection end points, the session connection end points can directly pass through API (Application Programming Interface, API) and directly notifies Dynamic Host Configuration Protocol server to remove processing in the described step 302.
Accompanying drawing 5 is the non-passive termination process schematic diagram of system of the present invention, and session connection is IP session (IP session), and the administration configuration server is Dynamic Host Configuration Protocol server, and as shown in Figure 5, concrete steps are as follows:
Step 501, session connection end-point detection connect by non-passive termination to session;
Session connection end points (BNG/BRAS/IP Edge) detects the non-passive termination of IP Session of appointment, for example: the session connection end points detects DHCP release message by DHCP Relay or PROXY mechanism, and triggering session connects termination.
Step 502, Dynamic Host Configuration Protocol server detect session connection by non-passive termination, as receive DHCP release message or detect the address rental period and expire, and the releasing that the Dynamic Host Configuration Protocol server triggering session connects is processed;
Step 503, Dynamic Host Configuration Protocol server are received described DHCP Release message, resolve this message after, according to the content of this message, discharge the address of appointment, perhaps according to rental period of appointment address that expires; If have application server then Dynamic Host Configuration Protocol server sends session connection to application server stops notification message, the notice application server stops session connection and processes, and deletes the on-position related information of described session connection or collocation strategy or resource management server that strategic server is deleted described session connection discharge the resource that described session connection takies such as the on-position associated server;
Step 504, session connection end points generate charging and stop message (Accounting Stop), then send a message to accounting server (aaa server);
Step 505, after aaa server receives that charging stops message, judge whether last Session of specified subscribers of IP Session that current generation stops, if and have an application server, then send subscriber's indication notification message that rolls off the production line to application server, require application server to stop all session connections of subscriber, the resource that takies such as the collocation strategy of all session connections of the on-position related information of all session connections of on-position associated server deletion subscriber or strategic server deletion subscriber or all session connections that resource management server discharges the subscriber; Here, aaa server need to stop by charging (Accounting Stop) message and finds subscriber's profile, subscriber's profile comprises subscriber's CAMEL-Subscription-Information and subscriber's parameter, such as subscriber's title, password etc., can be according to IP address or MAC Address or LLID searching; After aaa server finds charging to stop subscriber profile corresponding to (Accounting Stop) message, the structure subscriber indication notification message that rolls off the production line, send to application server, subscriber's indication notification message that rolls off the production line comprises and is not limited only to DIAMTER, snmp message, aaa server subscriber profile parameter and charging stop (Accounting Stop) message, with reference to the messaging protocol structure subscriber indication notification message that rolls off the production line, subscriber's indication notification message that rolls off the production line comprises subscriber identification (such as subscriber's title) at least or/and subscriber's IP address.
Step 506, session connection end points are removed session connection.
The session connection end points is removed the local configuration data of session connection, such as the address binding table, stops Keep-alive timer etc.
Step 504,505 is optional step, need to be according to actual deployment needs whether, and using such as special line not to need charge information.
See also accompanying drawing 6, the described session connection management devices of the embodiment of the invention comprises:
The session connection state detection module, for the state event of surveying described session connection, the passive termination of identification session connection;
Session connection state notifying module is used for the passive termination event notice of described session connection to the relevant administration configuration server of described session connection.
Of particular note, as described in embodiment in front, Dynamic Host Configuration Protocol server can be the home server that is integrated in session connection end points inside, be that Dynamic Host Configuration Protocol server and session connection end points are realized in same equipment, in this case, described IP Dialog processing device and Dynamic Host Configuration Protocol server can be positioned at same entity, and namely described session connection processing unit can be in the same place with the administration configuration server is integrated.
See also accompanying drawing 7, the described session connection management system of the embodiment of the invention comprises:
The session connection end-point devices is used for managing described session connection, surveys the termination event of described session connection, identifies the passive termination of described session connection, notifies described session connection relevant administration configuration server described passive termination;
The administration configuration server is used for managing the configuration of described session connection, receives the passive termination notice that comes from described session connection end points, resolves described passive termination notice, removes processing, such as releasing IP addresses at interior related resource.
Application server after passive termination occurs in session connection, according to the request of described administration configuration server, discharges the resource relevant with described session connection.
Wherein, described application server can be strategic server, session connection location server or resource management server etc.
Wherein, described administration configuration server can also comprise:
Notification module is used for notifying described application server with the passive termination message of described session connection.
Wherein, described administration configuration server can also comprise:
Initiatively discharge processing module, be used for initiatively discharging the configuration of described session connection, and the termination of described session connection is notified to application server.
Described session connection management system can also comprise:
Authentication and authorization charging server after passive termination occurs in session connection, according to the request of described session connection end points, carries out corresponding charging and processes.
Wherein, described session connection end points can also comprise:
Notification module is processed in charging, is used for after described session connection end points detects the session connection termination, notifies described authentication and authorization charging server to carry out corresponding charging and processes.
Wherein, described authentication and authorization charging server may further include: detect whether last connection of subscriber of described session connection, if then send the subscriber and roll off the production line the indication notice to the relevant application server of described session connection.
Concrete signalling interactive process and the associative operation of said apparatus and system can be with reference to the detailed descriptions of top embodiment.
The above; it only is the better embodiment of the embodiment of the invention; but the protection range of the embodiment of the invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the embodiment of the invention discloses; the variation that can expect easily or replacement all should be encompassed within the protection range of the embodiment of the invention.Therefore, the protection range of the embodiment of the invention should be as the criterion with the protection range of claim.
Claims (9)
1. the management method of a session connection is characterized in that, comprising:
The end-point detection of session connection is to the passive termination of IP session, and described passive termination refers to not to be the termination that initiatively triggers by session connection client and administration configuration server;
The end points of described session connection generates and stops notification message, sends to relevant administration configuration server, so that described configuration server is removed processing; The sign that comprises described IP session in the described termination notification message;
Described administration configuration server is removed to process and comprised: described administration configuration server discharges the IP address of described IP session;
The end points of described session connection comprises: wideband network gateway, or Broadband Remote Access Server, or IP edge device;
Described passive termination comprises at least a in the following situations:
The termination that the survival mechanisms of described session connection triggers, the termination that authentication and authorization charging server triggers, the termination that network management system triggers, the link of carrying session connection or the termination of path down trigger.
2. method according to claim 1 is characterized in that, described session connection end-point detection comprises to the passive termination of IP session:
The end points of described session connection detects IP session termination event;
According to described termination event, described session connection end points is identified the described passive termination that terminates as.
3. method according to claim 1 is characterized in that, described termination notification message comprises:
DHCP Release message, or the message of DIAMTER or snmp protocol.
4. method according to claim 1 is characterized in that, described administration configuration server is removed processing, also comprises:
The new notification message of described administration configuration server constructs is sent to application server, the termination that the notice application server carries out session connection.
5. method according to claim 1 is characterized in that, the end-point detection of described session connection also comprises after session connects passive termination:
Described session connection end points notification authentication mandate accounting server and/or application server carry out termination.
6. according to claim 1 to 5 arbitrary described method, it is characterized in that:
Described administration configuration server comprises Dynamic Host Configuration Protocol server.
7. the management system of a session connection is characterized in that, comprising:
The session connection end-point devices is used for managing I P session, surveys the termination event of described IP session, identifies the passive termination of described IP session, notifies described IP session relevant administration configuration server described passive termination; Also be used for after described session connection end points detects the IP session termination, notification authentication mandate accounting server carries out corresponding charging to be processed;
The administration configuration server is used for managing the configuration of described IP session, receives the passive termination notice that comes from described session connection end points, resolves described passive termination notice, and releasing IP addresses is at interior related resource; Also be used for notifying application server with the passive termination message of described IP session;
Application server is used for according to the request of described administration configuration server, discharging the resource relevant with described IP session after passive termination occurs in described IP session;
Authentication and authorization charging server is used for after described IP session stops, and according to the request of described session connection end points, carries out corresponding charging and processes;
The end points of described session connection comprises: wideband network gateway, or Broadband Remote Access Server, or IP edge device;
Described passive termination refers to not to be that the termination that initiatively triggers by session connection client and administration configuration server, described passive termination comprise at least a in the following situations:
The termination that the survival mechanisms of described session connection triggers, the termination that authentication and authorization charging server triggers, the termination that network management system triggers, the link of carrying session connection or the termination of path down trigger.
8. system according to claim 7 is characterized in that,
Described application server comprises strategic server, session connection location server or resource management server
9. according to claim 7 or 8 described systems, it is characterized in that, described authentication and authorization charging server further comprises: detect whether last connection of subscriber of described IP session, if then subscriber's offline information is notified to the relevant application server of described IP session.
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| CN 200710074465 CN101304406B (en) | 2007-05-12 | 2007-05-12 | Method for managing conversation connection as well as apparatus and system |
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| CN101437021B (en) | 2007-11-16 | 2013-08-07 | 华为技术有限公司 | Method, system and apparatus for processing access prompt information |
| CN104009990B (en) * | 2014-05-26 | 2017-06-16 | 桂林力港网络科技有限公司 | The method and system that many people communicate are realized using point-to-point real-time media communications scheme |
| CN105743960B (en) * | 2015-07-20 | 2019-09-06 | 浪潮(北京)电子信息产业有限公司 | The management method and device of session connection |
| CN105282270B (en) * | 2015-11-03 | 2019-09-20 | 北京星网锐捷网络技术有限公司 | A kind of method, apparatus and system for preventing IP address from falsely using |
| CN108923956A (en) * | 2018-06-13 | 2018-11-30 | 广州微林软件有限公司 | A kind of method of network data transmission |
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| CN1735278A (en) * | 2004-06-17 | 2006-02-15 | Lg电子株式会社 | mobile telecommunication system and method for session termination |
| CN1794872A (en) * | 2005-07-12 | 2006-06-28 | 华为技术有限公司 | Method of stopping conversation in radio access network |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1735278A (en) * | 2004-06-17 | 2006-02-15 | Lg电子株式会社 | mobile telecommunication system and method for session termination |
| CN1794872A (en) * | 2005-07-12 | 2006-06-28 | 华为技术有限公司 | Method of stopping conversation in radio access network |
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