CN102340408B - A kind of access node information query method and system - Google Patents
A kind of access node information query method and system Download PDFInfo
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- CN102340408B CN102340408B CN201010233537.4A CN201010233537A CN102340408B CN 102340408 B CN102340408 B CN 102340408B CN 201010233537 A CN201010233537 A CN 201010233537A CN 102340408 B CN102340408 B CN 102340408B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/02—Standardisation; Integration
- H04L41/0213—Standardised network management protocols, e.g. simple network management protocol [SNMP]
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Abstract
The invention discloses a kind of access node information query method, business control nodes (SN) sends diagnosis query messages to access node (AN); Simple Network Management Protocol (SNMP) the read requests protocol Data Unit corresponding with required query contents is comprised in diagnosis query messages; AN receives diagnosis query messages, returns query response message to SN; Comprise the SNMP corresponding with required query contents in query response message and read response protocol data cell.The invention also discloses a kind of access node information query system, information query unit is used for AN and receives diagnosis query messages, returns query response message to SN; Comprise the SNMP corresponding with required query contents in query response message and read response protocol data cell.Adopt method and system of the present invention, not only between SN and AN, realize directly inquiry, and make information inquiry simple and easy to do, thus avoid prior art need revise workload spent by protocol stack and time cost.
Description
Technical field
The present invention relates to network communication field, particularly relate 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 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, brings very large challenge to network operation ability, and overall network service quality is difficult to continue to promote.How to promote the maintenance efficiency of existing network and then promote customer service quality, having become more and more important research topic.
Business control nodes (SN, ServiceNode) and business router (SR, ServiceRouter) are the service control network element of broadband network, play the key player of user management, customer service control in a network.Access node (AN, AccessNode) be the sided access network element of broadband network, play the role of the access of " last one kilometer " user link and management in a network, be the important network element between end user and SN, the configuration error, flow congestion, equipment fault etc. of AN all can have an impact to user conversation or customer service quality.Wherein, described SN can be far-end BAS Broadband Access Server (BRAS, BroadbandRemoteAccessServer); Described AN can change planes for digital subscriber line access multiplex (DSLAM), optical line terminal (OLT)/optical network unit (ONU) or user's top-cross.
In current broadband access network, SN and AN is as the side of being queried, usually different network management system (NMS is adopted separately, NetworkManagementSystem) be configured and safeguard, and belong to different maintenance teams under many circumstances, as SN maintenance team and the AN maintenance team of an operator inside; Or SN and AN belongs to different operator respectively, is responsible for maintenance by respective maintenance team under business wholesale (Wholesale) scene.In these situations above-mentioned, to occur under the session failure of user or service quality after degradation problem, just may need inter-network guard system, carry out collaborative diagnosis across maintenance team or even cross operator, the maintenance efficiency of its network also successively reduces thereupon, that is, inter-network guard system, carry out these three kinds of situations of collaborative diagnosis across maintenance team, cross operator under, comparatively speaking, the maintenance efficiency of inter-network guard system network is the highest, maintenance efficiency across maintenance team's network takes second place, and the maintenance efficiency of cross operator network is minimum.Particularly when across maintenance team or cross operator cooperation, often go wrong and describe unclear, the repeatedly communication problem such as confirmations repeatedly, be difficult to reach efficiently, the effect of quick position.
Having its source in of the problems referred to above: SN with AN adopts the different management system of two covers to work alone separately respectively, cannot realize for various diagnostic message quick, consistent collection, and SN is the control of user conversation and business in the broadband network, SN and management system thereof and administrative staff need in time, understand the diagnostic message on AN accurately, confirm the reason that the situation that network failure or service quality decline occurs fast, that is, need SN as inquiry, AN is as the person of being queried, therebetween information interaction is carried out, by SN according to the diagnostic message inquired from AN, the reason that the situation that quick confirmation network failure or service quality decline occurs.
The current network equipment, comprise SN and AN, when carrying out information inquiry, mainly by Simple Network Management Protocol (SNMP, SimpleNetworkManagementProtocol), at NMS or Element management system (EMS, and between the network equipment, set up the passage of information interaction ElementManagementSystem), NMS or EMS is except can passing through the information on SNMP requester network equipment, configuration order can also be sent to the network equipment, and accept alarm that the network equipment uploads etc.
As mentioned above, realize the information interaction between SN and AN, if dispose SNMP to carry out the diagnostic message inquiry on AN between SN and AN, SN is then needed to support a whole set of SNMP, be: except supporting the function of SNMP client (SNMPClient), also need the sophisticated functions supporting SNMP server end (SNMPServer), and current SN only supports the function of SNMP client (SNMPClient) usually.If adopt SNMP when wanting support information mutual, then need to revise protocol stack, comparatively large to the change of SN, and for AN, change is less relatively, because AN still only needs the function supporting SNMPClient.
In sum, SN and AN, owing to adhering to the configuration of different management system separately, therefore, directly can not inquire about between the two and cause inquiry effect low, have influence on the maintenance efficiency of network.If realize between the two directly inquiring about, adopting prior art to need to introduce SNMP, carrying out information interaction by disposing SNMP between SN and AN, but a whole set of SNMP just can realize to need SN to support, large to the amendment of protocol stack, the workload expended and time cost 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, thus avoid prior art need revise workload spent by 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, the method comprises:
Business control nodes (SN) sends diagnosis query messages to access node (AN); Wherein, Simple Network Management Protocol (SNMP) the read requests protocol Data Unit corresponding with required query contents is comprised in described diagnosis query messages;
AN receives described diagnosis query messages, returns query response message to SN; Wherein, comprise the SNMP corresponding with required query contents in described query response message and read response protocol data cell.
Wherein, the triggering mode that the transmission triggering described diagnosis query messages adopts comprises one of following: network management system to described SN issue the triggering mode of instruction triggers SN diagnosis, SN automatic diagnosis triggering mode, triggered the triggering mode of SN diagnosis by order line.
Wherein, when adopting network management system to issue the triggering mode of instruction triggers SN diagnosis to described SN, the method also comprises: when the network management system of described SN is diagnosed as required, and after issuing the diagnosis inquiry to described AN to described SN, described SN sends described diagnosis query messages to described AN.
Wherein, when adopting the triggering mode of SN automatic diagnosis, the method also comprises: during SN self diagnosis, and after initiatively initiating automatic diagnosis to described AN, described SN sends described diagnosis query messages to described AN.
Wherein, described SN, to the Query Result obtained after described AN sends described diagnosis query messages, is encapsulated in described SNMP and reads in response protocol data cell;
After described SN obtains described Query Result, the method also comprises: described Query Result is sent to described network management system and preserves or be directly kept at by described Query Result on described SN and passes through inquiry of command line for attendant by described SN.
A kind of access node information query system, this system comprises: information query unit and information response's unit; Wherein,
Described information query unit, for sending diagnosis query messages to AN; Wherein, the SNMP read requests protocol Data Unit corresponding with required query contents is comprised in described diagnosis query messages;
Described information response unit, receives described diagnosis query messages for described AN, returns query response message to described SN; Wherein, comprise the SNMP corresponding with required query contents in described query response message and read response protocol data cell.
Wherein, described information query unit, the triggering mode adopted when being further used for the transmission triggering described diagnosis query messages comprises: network management system is issued the triggering mode of instruction triggers SN diagnosis, the triggering mode of SN automatic diagnosis to described SN or triggered the triggering mode of SN diagnosis by order line.
Wherein, described information query unit, to be further used for adopted triggering mode be described network management system when issuing the triggering mode of instruction triggers SN diagnosis to described SN, when the network management system of described SN is diagnosed as required, issue to described SN and inquire about the diagnosis of described AN, described SN sends described diagnosis query messages to described AN.
Wherein, described information query unit, when to be further used for adopted triggering mode be the triggering mode of described SN automatic diagnosis, during SN self diagnosis, after initiatively initiating automatic diagnosis to described AN, described SN sends described diagnosis query messages to described AN.
Wherein, after described SN sends described diagnosis query messages to described AN, obtain the Query Result of described information response unit feedback and be encapsulated in described SNMP reading response protocol data cell;
Described information query unit, be further used for described SN when obtaining described Query Result, described Query Result is sent to described network management system and preserves or be directly kept at by described Query Result on described SN and passes through inquiry of command line for attendant by described SN.
SN of the present invention sends diagnosis query messages to AN; The SNMP read requests protocol Data Unit corresponding with required query contents is comprised in diagnosis query messages; AN receives diagnosis query messages, returns query response message to SN; Comprise the SNMP corresponding with required query contents in query response message and read response protocol data cell.
Adopt the present invention, existing communication protocol between SN and AN is utilized to carry out information inquiry, and in this communication protocol, extend little SNMP function, that is: SNMP read requests protocol Data Unit and SNMP reading response protocol data cell is introduced, not only realize directly inquiring about between SN and AN, and make information inquiry simple and easy to do, thus avoid prior art need revise workload spent by protocol stack and time cost.
Accompanying drawing explanation
Fig. 1 is a schematic diagram of network topological diagram of the present invention;
Fig. 2 be the inventive method realize principle process schematic diagram;
The network topology schematic diagram that Fig. 3 applies for the embodiment of the present invention one;
The network topology schematic diagram that Fig. 4 is the embodiment of the present invention two, embodiment three is applied;
Fig. 5 is the composition structural representation of present system.
Embodiment
Basic thought of the present invention is: SN, by communication protocol existing between SN and AN, sends diagnosis query messages to AN, comprises the SNMP read requests protocol Data Unit (PDU) corresponding with required query contents in diagnosis query messages; AN returns query response message to SN, comprises the SNMP corresponding with required query contents and read response pdus in the query response message returned after receiving diagnosis query messages.
Be described in further detail below in conjunction with the enforcement of accompanying drawing to technical scheme.
The solution of the present invention, its principle is mainly expanded communication protocol existing between SN and AN, this expansion is exactly that the part of functions of SNMP is added existing communication protocol, be: in existing communication protocol, carry SNMP read requests (get-request) protocol Data Unit (PDU) and read response (get-response) PDU, to realize directly carrying out information interaction between SN and AN, SN directly can be diagnosed to AN.Instead of as prior art, this direct information be realized and diagnose alternately and directly, need to increase a complete set of snmp protocol function, comparatively large to the amendment of protocol stack, make to revise workload spent by protocol stack and time cost increases greatly.
A kind of access node information query method, the method mainly comprises following content:
One: SN by communication protocol existing between SN and AN, sends diagnosis query messages to AN, comprises the SNMP read requests PDU corresponding with required query contents in diagnosis query messages.
Here, described existing communication protocol comprises: access control protocol (ANCP agreement, AccessNodeControlProtocol).
Two: AN receive diagnosis query messages after, return query response message to SN, comprise the SNMP corresponding with required query contents in the query response message returned and read response pdus.
Further, the triggering mode of the method triggering diagnostic process comprises: the triggering mode that network management system is issued the triggering mode of instruction triggers SN diagnosis, the triggering mode of SN automatic diagnosis to SN or diagnosed by order line manual activation SN.
Further, when adopting network management system to issue the triggering mode of instruction triggers SN diagnosis to SN, the method comprises: when the network management system of SN is diagnosed as required, after issuing the diagnosis inquiry to AN when diagnosing SN by diagnostic requirements, sends diagnosis query messages to AN.
Further, when adopting the triggering mode of SN automatic diagnosis, the method also comprises: SN self diagnosis, to problem, as user's heartbeat message loss etc. detected, after initiatively initiating automatic diagnosis to AN, sends diagnosis query messages to AN.
Further, the Query Result that SN obtains after AN transmission diagnosis query messages, is encapsulated in SNMP and reads in response pdus;
After SN obtains described Query Result, the method also comprises: the Query Result of acquisition is sent to network management system and preserves or be directly kept at by the Query Result of acquisition on SN and passes through inquiry of command line for attendant by SN.
Here it is to be noted: the application scenarios of the present invention program comprises: be applied to network failure, scene when such as user conversation interrupts extremely; Or be applied to user and appeal service quality decline, such as customer complaint bandwidth does not always reach scene during signing value.That is, the solution of the present invention can be adopted to diagnose when business is thoroughly interrupted or when quality of service declines.The solution of the present invention, except above-mentioned application scenarios, can also be applied to the scene that routine work checks.
Fig. 1 is a generic structure of network topological diagram of the present invention, comprises home gateway (RG), AN, go-between and SN.
Fig. 2 be the inventive method realize principle process schematic diagram, the flow process of Fig. 2 comprises the following steps:
Step 101, SN send diagnosis query messages by the communication protocol between SN and AN to AN, comprise the SNMP read requests PDU corresponding with required query contents in diagnosis query messages.
Step 102, AN return query response message to SN, comprise the SNMP corresponding with required query contents and read response pdus in the query response message returned after receiving diagnosis query messages.
Carry out citing to the present invention below to set forth.
Embodiment one: the automatic diagnosis under point-to-point protocol (PPPoE, point-to-pointprotocoloverethernet) the user conversation abnormal conditions on Ethernet.Network topology architecture as shown in Figure 3.
Step 201, BRAS are lost for continuous three times by user PPP heartbeat message (PPPkeepalive), judge that user conversation produces abnormal.
Step 202, startup access diagnosis mechanism, BRAS sends diagnosis query messages by ANCP to DSLAM, the configuration of inquiry DSLAM user-side port, the ascending VLAN configuration of this user, up-downgoing port real-time traffic, system CPU occupancy rate etc., read requests PDU corresponding different respectively.
After step 203, DSLAM receive diagnosis query messages, local management information storehouse (MIB is accessed according to different read requests PDU, ManagementInformationBase), Query Result is encapsulated in reading response pdus and sends to BRAS by ANCP.
The Query Result received is sent to NMS or EMS or is kept at this locality and passes through inquiry of command line for attendant by step 204, BRAS.
Embodiment two: on-demand, customer complaint service quality is unstable, is diagnosed DSLAM by SR.Network topology architecture as shown in Figure 4.
Step 301, service centre receive QoS of customer instability and complain, and notice maintenance team carries out failure diagnosis.
Step 302, first SR to be diagnosed by the network management system of SR.
Step 303, under in confirmation, SR do not have out of order situation, the network utilizing the Ethernet between SR and DSLAM (Ethernet) operation management maintain (OAM) mechanism to detect between SR and DSLAM has fault-free.
Step 304, under confirming that the network between SR and DSLAM does not have out of order situation, whether the link detected between DSLAM and user RG by ANCP access link OAM mechanism is normal.
Step 305, in confirmation user's access link normal situation, start access diagnosis mechanism, require that SR sends diagnosis query messages to DSLAM by webmaster or order line, the configuration of inquiry DSLAM user-side port, the ascending VLAN configuration of this user, up-downgoing port real-time traffic, system CPU occupancy rate etc., read requests PDU corresponding different respectively.
Step 306, DSLAM access local MIB according to different read requests PDU after receiving diagnosis query messages, are encapsulated in by Query Result to read in response pdus to send to SR by ANCP.
The Query Result received is sent to NMS or EMS or is shown to attendant at order line operation interface by step 307, SR.
If by diagnosis query messages, step 308 BRAS finds that AN is abnormal, then report exception to AN maintenance team; If do not note abnormalities, be then judged as that this user's internal network occurs abnormal.
Embodiment three: on-demand, after DHCP (IPoE, the DHCPoverEthernet) customer service received on Ethernet interrupts complaint, is diagnosed DSLAM by SR.Network topology architecture 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, first SR to be diagnosed by the network management system of SR.
Step 403, under in confirmation, SR do not have out of order situation, the network utilizing the mechanism of the EthernetOAM between SR and DSLAM to detect between SR and DSLAM has fault-free.
Step 404, under confirming that the network between SR and DSLAM does not have out of order situation, whether normal by the link detected between DSLAM and user RG by ANCP access link OAM mechanism.
Step 405, in confirmation user's access link normal situation, start access diagnosis mechanism, require that SR sends diagnosis query messages to DSLAM by webmaster or order line, the configuration of inquiry DSLAM user-side port, the ascending VLAN configuration of this user, up-downgoing port real-time traffic, system CPU occupancy rate etc., read requests PDU corresponding different respectively.
Step 406, DSLAM access local MIB according to different read requests PDU after receiving diagnosis query messages, are encapsulated in by Query Result to read in response pdus to send to SR by ANCP.
The Query Result received is sent to NMS or EMS or is shown to attendant at order line operation interface by step 407, SR.
If by diagnosis query messages, step 408 SR finds that AN is abnormal, then report exception to AN maintenance team; If do not note abnormalities, be then judged as that this user's internal network occurs abnormal (the netting twine disconnection etc. as between user PC and RG).
Embodiment four: the current check of customer service.
Step 501, in the normal situation of customer service, attendant issues the AN relevant to certain customer service by network management system or order line to SN and diagnoses query messages, the read requests PDU that different query contents is corresponding different respectively.
Step 502, DSLAM access local MIB according to different read requests PDU after receiving diagnosis query messages, are encapsulated in by Query Result to read in response pdus to send to SN by ANCP.
The Query Result received is sent to NMS or EMS or is shown to attendant at order line operation interface by step 503, SN.
Step 504, attendant are at the order line Debugging message by 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's unit; Wherein, when information query unit carries out information inquiry for SN by communication protocol existing between SN and AN, send diagnosis query messages to AN; The SNMP read requests PDU corresponding with required query contents is comprised in diagnosis query messages.Information response's unit is used for AN and receives diagnosis query messages, returns query response message to SN; Comprise the SNMP corresponding with required query contents in query response message and read response pdus.
Here, the triggering mode adopted when information query unit is further used for the transmission triggering diagnosis query messages comprises: network management system is issued the triggering mode of instruction triggers SN diagnosis, the triggering mode of SN automatic diagnosis to SN or triggered the triggering mode of SN diagnosis by order line.
Here, information query unit is further used for adopted triggering mode when to be network management system issue the triggering mode of instruction triggers SN diagnosis to SN, when the network management system of SN is diagnosed as required, issue inquire about the diagnosis of AN to SN, SN sends diagnosis query messages to AN.
Here, information query unit is further used for adopted triggering mode when being the triggering mode of SN automatic diagnosis, and during SN self diagnosis, after initiatively initiating automatic diagnosis to AN, SN sends diagnosis query messages to AN.
Here, after SN sends diagnosis query messages to AN, obtain the Query Result of information response's unit feedback and be encapsulated in SNMP reading response pdus.When information query unit is further used for SN acquisition Query Result, the Query Result of acquisition is sent to network management system and preserves or be directly kept at by the Query Result of acquisition on SN and passes through inquiry of command line for attendant by SN.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.
Claims (10)
1. an access node information query method, is characterized in that, the method comprises:
Business control nodes SN sends diagnosis query messages by existing communication agreement to access node AN, wherein, comprises the Simple Network Management Protocol SNMP read requests protocol Data Unit corresponding with required query contents in described diagnosis query messages;
AN receives described diagnosis query messages, returns query response message by described existing communication agreement to SN; Wherein, comprise the SNMP corresponding with required query contents in described query response message and read response protocol data cell,
Wherein, described existing communication agreement comprises access control protocol ANCP.
2. method according to claim 1, it is characterized in that, the triggering mode that the transmission triggering described diagnosis query messages adopts comprises one of following: network management system to described SN issue the triggering mode of instruction triggers SN diagnosis, SN automatic diagnosis triggering mode, triggered the triggering mode of SN diagnosis by order line.
3. method according to claim 2, it is characterized in that, when adopting network management system to issue the triggering mode of instruction triggers SN diagnosis to described SN, the method also comprises: when the network management system of described SN is diagnosed as required, after issuing the diagnosis inquiry to described AN to described SN, described SN sends described diagnosis query messages to described AN.
4. method according to claim 2, is characterized in that, when adopting the triggering mode of SN automatic diagnosis, the method also comprises: during SN self diagnosis, and after initiatively initiating automatic diagnosis to described AN, described SN sends described diagnosis query messages to described AN.
5. the method according to any one of claim 2 to 4, is characterized in that, described SN, to the Query Result obtained after described AN sends described diagnosis query messages, is encapsulated in described SNMP and reads in response protocol data cell;
After described SN obtains described Query Result, the method also comprises: described Query Result is sent to described network management system and preserves or be directly kept at by described Query Result on described SN and passes through inquiry of command line for attendant by described SN.
6. an access node information query system, is characterized in that, this system comprises: information query unit and information response's unit; Wherein,
Described information query unit, for sending diagnosis query messages by existing communication agreement to access node AN, wherein, comprises the SNMP read requests protocol Data Unit corresponding with required query contents in described diagnosis query messages;
Described information response unit, receives described diagnosis query messages for described AN, returns query response message by described existing communication agreement to business control nodes SN; Wherein, comprise the SNMP corresponding with required query contents in described query response message and read response protocol data cell,
Wherein, described existing communication agreement comprises access control protocol ANCP.
7. system according to claim 6, it is characterized in that, described information query unit, the triggering mode adopted when being further used for the transmission triggering described diagnosis query messages comprises: network management system is issued the triggering mode of instruction triggers SN diagnosis, the triggering mode of SN automatic diagnosis to described SN or triggered the triggering mode of SN diagnosis by order line.
8. system according to claim 7, it is characterized in that, described information query unit, to be further used for adopted triggering mode be described network management system when issuing the triggering mode of instruction triggers SN diagnosis to described SN, when the network management system of described SN is diagnosed as required, issue to described SN and inquire about the diagnosis of described AN, described SN sends described diagnosis query messages to described AN.
9. system according to claim 7, it is characterized in that, described information query unit, when to be further used for adopted triggering mode be the triggering mode of described SN automatic diagnosis, during SN self diagnosis, after initiatively initiating automatic diagnosis to described AN, described SN sends described diagnosis query messages to described AN.
10. the system according to any one of claim 7 to 9, is characterized in that, after described SN sends described diagnosis query messages to described AN, obtains the Query Result of described information response unit feedback and is encapsulated in described SNMP reading response protocol data cell;
Described information query unit, be further used for described SN when obtaining described Query Result, described Query Result is sent to described network management system and preserves or be directly kept at by described Query Result on described SN and passes through inquiry of command line for attendant by described SN.
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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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| 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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| KR100941551B1 (en) * | 2003-12-29 | 2010-02-10 | 엘지노텔 주식회사 | Method for direct exchanging information among voip wireless phone by using wireless lan |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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