CN102340408A - Access node information query method and system thereof - Google Patents
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- CN102340408A CN102340408A CN2010102335374A CN201010233537A CN102340408A CN 102340408 A CN102340408 A CN 102340408A CN 2010102335374 A CN2010102335374 A CN 2010102335374A CN 201010233537 A CN201010233537 A CN 201010233537A CN 102340408 A CN102340408 A CN 102340408A
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Abstract
The invention discloses an access node information query method and a system thereof. The method is characterized in that: a service node (SN) sends a diagnosis query message to an access node (AN); the diagnosis query message comprises a simple network management protocol (SNMP) read request protocol data unit which corresponds with the needed query content; the AN receives the diagnosis query message and returns a query response message to the SN; the query response message comprises a SNMP read response protocol data unit which corresponds with the needed query content. The invention also discloses an access node information query system. An information query unit is used to send the diagnosis query message to the AN and an information response unit is used to return the query response message to the SN. By using the method and the system of the invention, the direct query between the SN and the AN can be realized and information query is easy to be performed so that workload and time costs consumed during modifying a protocol stack in the prior art can be avoided.
Description
Technical field
The present invention relates to network communication field, relate in particular to a kind of access node information query method and system.
Background technology
In recent years; Along with the develop rapidly of telecommunications industry, the popularity rate of the Internet is also in fast lifting, and the performance upgrade speed of the network capacity and the network equipment; Do not catch up with the development speed of Internet user and Internet service far away; Network failure takes place frequently, service quality unstable, and the network operation ability has been brought very large challenge, and the network overall quality of service is difficult to continue to promote.How to promote the maintenance efficiency of existing network and then promote the customer service quality, become more and more important research project.
Business control nodes (SN, Service Node) and business router (SR, Service Router) are the service control network element of broadband network, in network, are playing the part of the key player of user management, customer service control.Access node (AN; Access Node) is the sided access network element of broadband network; In network, playing the part of the role that " last kilometer " user link inserts and manages; Be the important network element between end user and the SN, the configuration error of AN, flow congestion, equipment fault etc. all can exert an influence to user conversation or customer service quality.Wherein, said SN can be far-end BAS Broadband Access Server (BRAS, Broadband Remote Access Server); Said AN can be digital subscriber line access multiplex (DSLAM), optical line terminal (OLT)/optical network unit (ONU) or user side switch.
In present broadband access network; SN and AN are as by the ISSUER; Usually adopt various network management system (NMS separately; Network Management System) is configured and safeguards, and belong to different maintenance teams under many circumstances, SN maintenance team and the AN maintenance team inner like an operator; Perhaps, SN and AN belong to different operator respectively, are responsible for maintenance by separately maintenance team under professional wholesale (Wholesale) scene.Under above-mentioned these situation; Take place under user's session failure or the service quality after the degradation problem, just possibly need the inter-network guard system, stride maintenance team or even cross operator is worked in coordination with diagnosis, the maintenance efficiency of its network is reduction one by one thereupon also; That is to say; At the inter-network guard system, stride maintenance team, cross operator and work in coordination with under these three kinds of situation of diagnosis, comparatively speaking, the maintenance efficiency of inter-network guard system network is the highest; The maintenance efficiency of striding maintenance team's network takes second place, and the maintenance efficiency of cross operator network is minimum.Particularly stride maintenance team or cross operator when cooperation, tending to go wrong and describe unclear, communication problem such as affirmations repeatedly repeatedly, be difficult to reach effect efficient, that locate fast.
Having its source in of the problems referred to above: SN adopts the different management system of two covers to work alone separately respectively with AN, can't realize for quick, the consistent collection of various diagnostic messages, and SN is user conversation and professional control in broadband network; SN and management system thereof and administrative staff need to understand in time, accurately the diagnostic message on the AN; Come to confirm fast the reason of the situation generation that network failure or service quality descend, that is to say, need SN as the inquiry; The AN conduct is by the inquiry; Carry out information interaction between the two, according to the diagnostic message that inquires from AN, confirm the reason of the situation generation that network failure or service quality descend fast by SN.
The current network equipment; Comprising SN and AN, when carrying out information inquiry, mainly is through Simple Network Management Protocol (SNMP; Simple Network Management Protocol); Between NMS or the Element management system (EMS, Element Management System) and the network equipment, set up the passage of information interaction, NMS or EMS are except passing through the information on the SNMP requester network equipment; Can also send configuration order to the network equipment, and accept alarm that the network equipment uploads or the like.
As stated; Realize the information interaction between SN and the AN; Carry out the diagnostic message inquiry on the AN if between SN and AN, dispose SNMP, then need SN to support a whole set of SNMP, be: except supporting the function of SNMP client (SNMP Client); Also need support the sophisticated functions of SNMP server end (SNMP Server), and current SN only supports the function of SNMP client (SNMP Client) usually.If support information adopts SNMP when mutual, then need revise protocol stack, bigger to the change of SN, and for AN, change relatively less because AN still only needs to support the function of SNMP Client.
In sum, SN and AN be owing to adhere to different management systems configurations separately, and therefore, the two can not directly be inquired about, and to cause inquiring about effect low, has influence on the maintenance efficiency of network.If the two realizes directly inquiry; Adopt prior art need introduce SNMP, carry out information interaction, but need SN to support a whole set of SNMP just can realize through between SN and AN, disposing SNMP; Modification to protocol stack is big, and workload that expends and time cost are high.
Summary of the invention
In view of this; Main purpose of the present invention is to provide a kind of access node information query method and system; Not only between SN and AN, realize directly inquiry, and make information inquiry simple and easy to do, thereby avoid prior art need revise spent workload of protocol stack and time cost.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of access node information query method, this method comprises:
Business control nodes (SN) sends the diagnosis query messages to access node (AN); Wherein, comprise the Simple Network Management Protocol corresponding (SNMP) in the said diagnosis query messages and read the request protocol data cell with required query contents;
AN receives said diagnosis query messages, returns query response message to SN; Wherein, comprise the SNMP corresponding in the said query response message and read the response protocol data cell with required query contents.
Wherein, triggering triggering mode that the transmission of said diagnosis query messages adopts comprises one of following: network management system issues the triggering mode of triggering mode, the SN automatic diagnosis of instruction triggers SN diagnosis, triggers the triggering mode of SN diagnosis through order line to said SN.
Wherein, Adopt network management system when said SN issues the triggering mode of instruction triggers SN diagnosis; This method also comprises: when the network management system of said SN was diagnosed as required, after said SN issued the diagnosis inquiry to said AN, said SN sent said diagnosis query messages and gives said AN.
Wherein, when adopting the triggering mode of SN automatic diagnosis, this method also comprises: during SN self diagnosis, initiatively to after the said AN initiation automatic diagnosis, said SN sends said diagnosis query messages and gives said AN.
Wherein, said SN sends the Query Result that obtains behind the said diagnosis query messages to said AN, is encapsulated in said SNMP and reads in the response protocol data cell;
After said SN obtained said Query Result, this method also comprised: said SN sends to said network management system with said Query Result and preserves, or said Query Result directly is kept at said SN goes up and supply the attendant through inquiry of command line.
A kind of access node information query system, this system comprises: information query unit and information response unit; Wherein,
Said information query unit is used for sending the diagnosis query messages to AN; Wherein, comprise the SNMP corresponding in the said diagnosis query messages and read the request protocol data cell with required query contents;
Said information response unit is used for said AN and receives said diagnosis query messages, returns query response message to said SN; Wherein, comprise the SNMP corresponding in the said query response message and read the response protocol data cell with required query contents.
Wherein, Said information query unit, the triggering mode that is adopted when being further used for triggering the transmission of said diagnosis query messages comprises: network management system to said SN issue triggering mode, the SN automatic diagnosis of instruction triggers SN diagnosis triggering mode, or trigger the triggering mode of SN diagnosis through order line.
Wherein, Said information query unit; To be said network management system issue under the situation of triggering mode of instruction triggers SN diagnosis to said SN the triggering mode that is further used for being adopted; When the network management system of said SN is diagnosed as required, issue the diagnosis inquiry to said AN to said SN, said SN sends said diagnosis query messages and gives said AN.
Wherein, said information query unit, the triggering mode that is further used for being adopted is under the situation of triggering mode of said SN automatic diagnosis, during SN self diagnosis, initiatively said AN is initiated automatic diagnosis after, said SN sends said diagnosis query messages and gives said AN.
Wherein, said SN obtains the Query Result of said information response unit feedback and is encapsulated in said SNMP to read in the response protocol data cell after said AN sends said diagnosis query messages;
Said information query unit; Be further used under the situation that said SN obtains said Query Result, said SN sends to said network management system with said Query Result and preserves, or said Query Result directly is kept at said SN goes up and supply the attendant through inquiry of command line.
SN of the present invention sends the diagnosis query messages to AN; Comprise the SNMP corresponding in the diagnosis query messages and read the request protocol data cell with required query contents; AN receives the diagnosis query messages, returns query response message to SN; Comprise the SNMP corresponding in the query response message and read the response protocol data cell with required query contents.
Adopt the present invention; Utilize between SN and the AN existing communication protocol to carry out information inquiry; And in this communication protocol, expanded SNMP function seldom, that is: introduce SNMP and read the request protocol data cell with SNMP reads the response protocol data cell, not only between SN and AN, realize directly inquiring about; And make information inquiry simple and easy to do, thereby avoid prior art need revise spent workload of protocol stack and time cost.
Description of drawings
Fig. 1 is a sketch map of network topological diagram of the present invention;
Fig. 2 is the realization principle process sketch map of the inventive method;
Fig. 3 is the embodiment of the invention one an applied network topology sketch map;
Fig. 4 is the embodiment of the invention two, embodiment three applied network topology sketch mapes;
Fig. 5 is the composition structural representation of system of the present invention.
Embodiment
Basic thought of the present invention is: SN sends the diagnosis query messages through existing communication protocol between SN and the AN to AN, comprises the SNMP corresponding with required query contents in the diagnosis query messages and reads request protocol data cell (PDU); AN returns query response message to SN after receiving the diagnosis query messages, comprises the SNMP corresponding with required query contents in the query response message that returns and reads response pdus.
Below in conjunction with accompanying drawing the enforcement of technical scheme is done further to describe in detail.
Scheme of the present invention; Its principle mainly is that existing communication protocol between SN and the AN is expanded; This expansion adds existing communication protocol with the part of functions of SNMP exactly; Be: in existing communication protocol, carry the SNMP request of reading (get-request) protocol Data Unit (PDU) and read response (get-response) PDU,, make SN carry out direct diagnostic value AN to realize directly carrying out information interaction between SN and AN.Rather than, realize that this direct information reaches direct diagnostic value alternately as prior art, needing increases a complete set of snmp protocol function, bigger to the modification of protocol stack, makes that revising spent workload and the time cost of protocol stack increases greatly.
A kind of access node information query method, this method mainly comprises following content:
One: SN sends the diagnosis query messages through existing communication protocol between SN and the AN to AN, comprises the SNMP corresponding with required query contents in the diagnosis query messages and reads request PDU.
Here, said existing communication protocol comprises: access control protocol (ANCP agreement, Access Node Control Protocol).
Two: AN returns query response message to SN after receiving the diagnosis query messages, comprises the SNMP corresponding with required query contents in the query response message that returns and reads response pdus.
Further, the triggering mode of this method triggering diagnostic process comprises: network management system issues the triggering mode of instruction triggers SN diagnosis, the triggering mode of SN automatic diagnosis or the triggering mode of diagnosing through order line manual activation SN to SN.
Further, adopt network management system when SN issues the triggering mode of instruction triggers SN diagnosis, this method comprises: when the network management system of SN is diagnosed as required, issue diagnosis inquiry when SN diagnose to AN by the diagnosis demand after, send the diagnosis query messages to AN.
Further, when adopting the triggering mode of SN automatic diagnosis, this method also comprises: self diagnoses problem SN, as detects user's heartbeat message and lose etc., initiatively AN is initiated automatic diagnosis after, send the diagnosis query messages and give AN.
Further, SN sends the Query Result that obtains behind the diagnosis query messages to AN, is encapsulated in SNMP and reads in the response pdus;
After SN obtained said Query Result, this method also comprised: SN sends to network management system with the Query Result that obtains and preserves, or the Query Result that obtains directly is kept at SN goes up and supply the attendant through inquiry of command line.
Here it is to be noted: the present invention program's application scenarios comprises: be applied to network failure, the scene during such as the user conversation aborted; Perhaps, be applied to the user and appeal service quality and descend, the scene when always not reaching signatory value such as the customer complaint bandwidth.That is to say, when business is thoroughly interrupted or quality of service can adopt scheme of the present invention to diagnose when descending.Scheme of the present invention can also be applied to the scene of routine work inspection except above-mentioned application scenarios.
Fig. 1 comprises home gateway (RG), AN, go-between and SN for a generic structure of network topological diagram of the present invention.
Fig. 2 is the realization principle process sketch map of the inventive method, and the flow process of Fig. 2 may further comprise the steps:
Below to the present invention's elaboration of giving an example.
Embodiment one: the automatic diagnosis under the point-to-point protocol on the Ethernet (PPPoE, point-to-point protocol over ethernet) the user conversation abnormal conditions.Network topology architecture is as shown in Figure 3.
Step 201, BRAS lose for continuous three times through user PPP heartbeat message (PPP keep alive), and the judges session produces unusual.
Step 202, the access diagnosis mechanism that starts; BRAS sends the diagnosis query messages through ANCP to DSLAM; The configuration of inquiry DSLAM user-side port, this user's ascending VLAN configuration, up-downgoing port real-time traffic, system CPU occupancy rate etc., the corresponding respectively different request PDUs that read.
Step 203, DSLAM receive after the diagnosis query messages, visit local management information storehouse (MIB, Management Information Base) according to the different request PDUs that reads, and Query Result are encapsulated in to read in the response pdus send to BRAS through ANCP.
Step 204, BRAS send to NMS or EMS with the Query Result of receiving or are kept at the local attendant of confession through inquiry of command line.
Embodiment two: mode as required, customer complaint service quality is unstable, through SR DSLAM is diagnosed.Network topology architecture is as shown in Figure 4.
Step 301, service centre receive the unstable complaint of QoS of customer, and notice maintenance team carries out failure diagnosis.
Step 302, at first SR is diagnosed through the network management system of SR.
Step 303, confirming that SR does not have under the situation of fault, the network that utilizes Ethernet (Ethernet) operation management maintain (OAM) mechanism between SR and the DSLAM to detect between SR and the DSLAM has fault-free.
Step 304, the network between affirmation SR and DSLAM do not have under the situation of fault, and whether the link that detects between DSLAM and the user RG through ANCP access link OAM mechanism is normal.
Step 305, confirming under the normal situation of user's access link; Start and insert diagnosis mechanism; Require SR to send the diagnosis query messages through webmaster or order line to DSLAM; The configuration of inquiry DSLAM user-side port, this user's ascending VLAN configuration, up-downgoing port real-time traffic, system CPU occupancy rate etc., the corresponding respectively different request PDUs that read.
Step 306, DSLAM receive after the diagnosis query messages, visit local MIB according to the different request PDUs that reads, and Query Result are encapsulated in to read in the response pdus send to SR through ANCP.
Step 307, SR send to the Query Result of receiving NMS or EMS or are shown to the attendant at the order line operation interface.
Step 308, unusual through diagnosis query messages discovery AN as if BRAS then reports unusually to AN maintenance team; If do not note abnormalities, then be judged as this user's internal network and occur unusual.
Embodiment three: mode as required, after receiving DHCP (IPoE, DHCP over Ethernet) customer service on the Ethernet and interrupting complaining, DSLAM is diagnosed through SR.Network topology architecture is as shown in Figure 4.
Step 401, service centre receive customer service and interrupt complaining, and notice maintenance team carries out failure diagnosis.
Step 402, at first SR is diagnosed through the network management system of SR.
Step 403, confirming that SR does not have under the situation of fault, the network that utilizes the Ethernet OAM mechanism between SR and the DSLAM to detect between SR and the DSLAM has fault-free.
Whether step 404, the network between affirmation SR and DSLAM do not have under the situation of fault, normal through the link that detects between DSLAM and the user RG through ANCP access link OAM mechanism.
Step 405, confirming under the normal situation of user's access link; Start and insert diagnosis mechanism; Require SR to send the diagnosis query messages through webmaster or order line to DSLAM; The configuration of inquiry DSLAM user-side port, this user's ascending VLAN configuration, up-downgoing port real-time traffic, system CPU occupancy rate etc., the corresponding respectively different request PDUs that read.
Step 406, DSLAM receive after the diagnosis query messages, visit local MIB according to the different request PDUs that reads, and Query Result are encapsulated in to read in the response pdus send to SR through ANCP.
Step 407, SR send to the Query Result of receiving NMS or EMS or are shown to the attendant at the order line operation interface.
Step 408, unusual through diagnosis query messages discovery AN as if SR then reports unusually to AN maintenance team; If do not note abnormalities, then be judged as this user's internal network and unusual (like the netting twine disconnection between user PC and the RG etc.) occur.
Embodiment four: the current check of customer service.
Step 501, under the normal situation of customer service, the attendant issues the AN diagnosis query messages relevant with certain customer service through network management system or order line to SN, the corresponding respectively different request PDUs that read of different query contents.
Step 502, DSLAM receive after the diagnosis query messages, visit local MIB according to the different request PDUs that reads, and Query Result are encapsulated in to read in the response pdus send to SN through ANCP.
Step 503, SN send to the Query Result of receiving NMS or EMS or are shown to the attendant at the order line operation interface.
Step 504, attendant are at the order line Debugging message through network management system or SN, and whether configuration and the ruuning situation of analyzing this business is normal.
A kind of access node information query system, as shown in Figure 5, this system comprises information query unit and information response unit; Wherein, information query unit is used for SN when existing communication protocol is carried out information inquiry between SN and the AN, sends the diagnosis query messages to AN; Comprise the SNMP corresponding in the diagnosis query messages and read request PDU with required query contents.The information response unit is used for AN and receives the diagnosis query messages, returns query response message to SN; Comprise the SNMP corresponding in the query response message and read response pdus with required query contents.
The triggering mode that is adopted when here, information query unit is further used for triggering the transmission of diagnosing query messages comprises: network management system issues the triggering mode of instruction triggers SN diagnosis, the triggering mode of SN automatic diagnosis, the triggering mode of perhaps diagnosing through order line triggering SN to SN.
Here; To be network management system issue under the situation of triggering mode of instruction triggers SN diagnosis to SN the triggering mode that information query unit is further used for being adopted; When the network management system of SN is diagnosed as required, issue the diagnosis inquiry to AN to SN, SN sends the diagnosis query messages and gives AN.
Here, the triggering mode that information query unit is further used for being adopted is under the situation of triggering mode of SN automatic diagnosis, during SN self diagnosis, initiatively AN is initiated automatic diagnosis after, SN sends the diagnosis query messages and gives AN.
Here, SN is after AN sends the diagnosis query messages, and the Query Result of acquired information response unit feedback also is encapsulated in SNMP and reads in the response pdus.Information query unit is further used under the situation that SN obtains Query Result, and SN sends to network management system with the Query Result that obtains and preserves, or the Query Result that obtains directly is kept at SN goes up and supply the attendant through inquiry of command line.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.
Claims (10)
1. an access node information query method is characterized in that, this method comprises:
Business control nodes (SN) sends the diagnosis query messages to access node (AN); Wherein, comprise the Simple Network Management Protocol corresponding (SNMP) in the said diagnosis query messages and read the request protocol data cell with required query contents;
AN receives said diagnosis query messages, returns query response message to SN; Wherein, comprise the SNMP corresponding in the said query response message and read the response protocol data cell with required query contents.
2. method according to claim 1; It is characterized in that, trigger triggering mode that the transmission of said diagnosis query messages adopts and comprise one of following: network management system issues the triggering mode of triggering mode, the SN automatic diagnosis of instruction triggers SN diagnosis, triggers the triggering mode of SN diagnosis through order line to said SN.
3. method according to claim 2; It is characterized in that; Adopt network management system when said SN issues the triggering mode of instruction triggers SN diagnosis; This method also comprises: when the network management system of said SN was diagnosed as required, after said SN issued the diagnosis inquiry to said AN, said SN sent said diagnosis query messages and gives said AN.
4. method according to claim 2 is characterized in that, when adopting the triggering mode of SN automatic diagnosis, this method also comprises: during SN self diagnosis, initiatively to after the said AN initiation automatic diagnosis, said SN sends said diagnosis query messages and gives said AN.
5. according to each described method of claim 2 to 4, it is characterized in that said SN sends the Query Result that obtains behind the said diagnosis query messages to said AN, be encapsulated in said SNMP and read in the response protocol data cell;
After said SN obtained said Query Result, this method also comprised: said SN sends to said network management system with said Query Result and preserves, or said Query Result directly is kept at said SN goes up and supply the attendant through inquiry of command line.
6. an access node information query system is characterized in that, this system comprises: information query unit and information response unit; Wherein,
Said information query unit is used for sending the diagnosis query messages to AN; Wherein, comprise the SNMP corresponding in the said diagnosis query messages and read the request protocol data cell with required query contents;
Said information response unit is used for said AN and receives said diagnosis query messages, returns query response message to said SN; Wherein, comprise the SNMP corresponding in the said query response message and read the response protocol data cell with required query contents.
7. system according to claim 6; It is characterized in that; Said information query unit, the triggering mode that is adopted when being further used for triggering the transmission of said diagnosis query messages comprises: network management system to said SN issue triggering mode, the SN automatic diagnosis of instruction triggers SN diagnosis triggering mode, or trigger the triggering mode of SN diagnosis through order line.
8. system according to claim 7; It is characterized in that; To be said network management system issue under the situation of triggering mode of instruction triggers SN diagnosis, when the network management system of said SN is diagnosed as required to said SN for said information query unit, the triggering mode that is further used for being adopted; Issue the diagnosis inquiry to said AN to said SN, said SN sends said diagnosis query messages and gives said AN.
9. system according to claim 7; It is characterized in that; Said information query unit, the triggering mode that is further used for being adopted are under the situation of triggering mode of said SN automatic diagnosis, during SN self diagnosis; After initiatively said AN being initiated automatic diagnosis, said SN sends said diagnosis query messages and gives said AN.
10. according to each described system of claim 6 to 9, it is characterized in that said SN obtains the Query Result of said information response unit feedback and be encapsulated in said SNMP to read in the response protocol data cell after said AN sends said diagnosis query messages;
Said information query unit; Be further used under the situation that said SN obtains said Query Result, said SN sends to said network management system with said Query Result and preserves, or said Query Result directly is kept at said SN goes up and supply the attendant through inquiry of command line.
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| CN201010233537.4A CN102340408B (en) | 2010-07-20 | 2010-07-20 | A kind of access node information query method and system |
| PCT/CN2011/076015 WO2012010030A1 (en) | 2010-07-20 | 2011-06-21 | Method and a system for inquiring access node information |
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| CN201010233537.4A CN102340408B (en) | 2010-07-20 | 2010-07-20 | A kind of access node information query method and system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050070175A (en) * | 2003-12-29 | 2005-07-07 | 엘지전자 주식회사 | Method for direct exchanging information among voip wireless phone by using wireless lan |
| CN1901686A (en) * | 2005-07-22 | 2007-01-24 | 北京三星通信技术研究有限公司 | Method for checking double mode terminal state in HRPD net by mobile exchange center |
| CN101572650A (en) * | 2008-04-30 | 2009-11-04 | 华为技术有限公司 | Method, device and system of IPTV resource allocation |
| CN101779417A (en) * | 2007-07-04 | 2010-07-14 | Lg电子株式会社 | Interworking procedure with external network in wireless lan and message format for the same |
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2010
- 2010-07-20 CN CN201010233537.4A patent/CN102340408B/en not_active Expired - Fee Related
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050070175A (en) * | 2003-12-29 | 2005-07-07 | 엘지전자 주식회사 | Method for direct exchanging information among voip wireless phone by using wireless lan |
| CN1901686A (en) * | 2005-07-22 | 2007-01-24 | 北京三星通信技术研究有限公司 | Method for checking double mode terminal state in HRPD net by mobile exchange center |
| CN101779417A (en) * | 2007-07-04 | 2010-07-14 | Lg电子株式会社 | Interworking procedure with external network in wireless lan and message format for the same |
| CN101572650A (en) * | 2008-04-30 | 2009-11-04 | 华为技术有限公司 | Method, device and system of IPTV resource allocation |
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| WO2012010030A1 (en) | 2012-01-26 |
| CN102340408B (en) | 2016-03-30 |
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