CN103516664A - A P2P business node selection method base on an IMS and an apparatus - Google Patents
A P2P business node selection method base on an IMS and an apparatus Download PDFInfo
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- CN103516664A CN103516664A CN201210201883.3A CN201210201883A CN103516664A CN 103516664 A CN103516664 A CN 103516664A CN 201210201883 A CN201210201883 A CN 201210201883A CN 103516664 A CN103516664 A CN 103516664A
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Abstract
The invention discloses a P2P business node selection method base on an IMS and an apparatus, and is applied to distributed-type P2P content distribution systems based on IMSs. According to the P2P business node selection method base on the IMS and the apparatus, in a process that a Peer node establishes a conversation with a Tracker application server through sending an Invite message, a SBC or/and a P-CSCF which the Invite message passes adds own identifications to the message to show an access position of the node. When the Tracker application server selects a service node for the Peer node, the selection is carried out according to the access position of the Peer node. Through the adoption of the P2P business node selection method base on the IMS and the apparatus of the invention, the selection of the service node can be optimized.
Description
Technical field
The present invention relates to the data service technology of the communications field, relate in particular to a kind of system of selection of P2P service node and device based on IMS.
Background technology
Based on IMS (IP Multimedia Subsystem, IP Multimedia System) the P2P content delivering system of framework, also can be described as the distributed content dissemination system based on IMS framework, the user who can be under IMS framework provides P2P (Peer-to-Peer, point-to-point) Streaming Media or P2P file downloading business.
IMS is IP multimedia system, is considered to the core technology of next generation network, is also to solve mobile and fixed network fusion, introduces the critical network framework of the differentiation such as voice, data, video, multimedia service.(the Proxy Call Session Control Function of P-CSCF in IMS framework, Proxy Call Session Control Function), SBC (Session Border Controller, Session Border Controller) be from the nearest network element of user, in the actual deployment of IMS, have three kinds of major ways: a minute province disposes system, regional center system, national centralized system.Divide to economize and dispose Zhi Zhong each province deployment P-CSCF, at prefectures and cities deployment SBC equipment inside the province, user terminal (Peer node) connects P-CSCF by SBC, thereby accesses IMS core net; Regional center system is for certain several province, only sets up a set of IMS core net, concentrates and disposes P-CSCF, and dispose SBC access device in the districts and cities of each province; For concentrate in the whole nation, only dispose a set of IMS equipment of the core network, in several province's nets exit, dispose P-CSCF and SBC equipment.
For P2P content distribution techniques, it is one of its key technology that node is selected, its objective is request of data node from candidate service node, select from requesting node more close to, transmission speed is very fast and have a plurality of service nodes that it needs data block, on the one hand, make requesting node full out from service node, to obtain the data block that it needs, on the other hand, requesting node obtains data from being positioned at the service node in same province and district city, reduces between province and the flow between districts and cities.And the proximity of decision node judges that whether requesting node and service node are in same province and district city, it is one of key issue in node selecting method.
At present, mostly adopt the similarity of IP address or the proximity that IP address base querying geographical position information is carried out decision node.Wherein, adopt IP address proximity to judge, generally depend on the strategy of operator's distributing IP address, two node physical locations that sometimes IP address is closed on may not be close, be difficult to the proximity of decision node exactly, the P2P flow between districts and cities, between province can be increased, also the speed that requesting node obtains data can be reduced, adopt IP address base querying geographical position information to judge, refer at Tracker server place and safeguard IP address base, in address base, record geographical position (as province and city) information corresponding to GeIP address in operator, although this method can be obtained geographical location information corresponding to IP address exactly, but when new IP address occurs or when geographical location information corresponding to DangIP address changes, operator need to inform that P2P application provider upgrades IP address base, otherwise will cause in address base inquiry less than the situation in geographical position corresponding to IP address and false judgment IP address, this has increased the maintenance costs between operator and P2P application.
Summary of the invention
The embodiment of the present invention provides a kind of system of selection of P2P service node and device based on IMS, in order to realize the judgement of node proximity, the selection of Optimized Service node in P2P business realizing process.
The P2P service implementation method based on IMS that the embodiment of the present invention provides, for the distributed P 2 P content delivering system based on IMS, the method comprises:
Tracker application server, after receiving the service conversation request message of Peer node, obtains the SBC that wherein carries or/and the identification information of P-CSCF node, and described identification information has identified the on-position of described Peer node; Wherein, SBC adds the identification information of self in this service conversation request message when forwarding the service conversation request message of Peer node, or/and P-CSCF node adds the identification information of self in this service conversation request message when forwarding the service conversation request message of Peer node;
When Tracker application server receives after the business request information of Peer node, according to the on-position of its each accessed Peer node, for sending the Peer node of described business request information, select service node, and the service node list of selecting is carried on to the Peer node that response message returns to the described business request information of transmission.
The Tracker application server that the embodiment of the present invention provides, is applied to the distributed P 2 P content delivering system based on IMS, and this Tracker application server comprises:
Node location information collection module, for after receiving the service conversation request message of Peer node, obtains the SBC that wherein carries or/and the identification information of P-CSCF node, and described identification information has identified the on-position of described Peer node; Wherein, SBC adds the identification information of self in this service conversation request message when forwarding the service conversation request message of Peer node, or/and P-CSCF node adds the identification information of self in this service conversation request message when forwarding the service conversation request message of Peer node;
Memory module, for preserve that described Dialog processing module gets for the SBC that identifies Peer node on-position or/and the identification information of P-CSCF node;
Node is selected module, for after receiving the business request information of Peer node, according to described memory module institute canned data, obtain the on-position of each Peer node, according to the on-position of each Peer node, for sending the Peer node of described business request information, select service node, and the service node list of selecting is carried on to the Peer node that response message returns to the described business request information of transmission.
In the above embodiment of the present invention, on the forward-path of the service conversation request message sending at Peer node, SBC is or/and P-CSCF adds the identification information that is used for identifying Peer node on-position in this service conversation request message, like this, on Tracker application server, can obtain the accessing position information of each Peer node.When Tracker application server is Peer node selection service node according to the service request receiving, the Peer node that is initiating business request according to the on-position of its resulting each Peer node is selected service node.By IP address, select service node to compare with prior art, the embodiment of the present invention is selected service node for this node according to the on-position of Peer node reality, can improve the accuracy of node proximity judgement, thereby compared with prior art, reduce trans-regional flow, thereby save network resource overhead.
Accompanying drawing explanation
Fig. 1 is the distributed content dissemination system schematic diagram based on IMS in the embodiment of the present invention;
The video traffic realization flow schematic diagram that Fig. 2 provides for the embodiment of the present invention;
The structural representation of the Tracker application server that Fig. 3 provides for the embodiment of the present invention.
Embodiment
The problems referred to above that exist for prior art, the embodiment of the present invention has proposed a kind of P2P business realizing mechanism based on IMS framework, rely on P-CSCF and the SBC information of node access to carry out the proximity between decision node, thereby Yi compare lowland cost exactly, the proximity of decision node in real time, reduce the internetwork P2P flow of zones of different, improve user's experience.
Below in conjunction with accompanying drawing, the embodiment of the present invention is described in detail.
Paper is the architecture of the P2P content delivering system based on IMS once.As shown in Figure 2, in the distributed content dissemination system based on IMS, comprise following functional entity:
Tracker application server (Tracker-AS): finishing service registration and authentication, be responsible for storage and inquiry channel information, realize PeerList (node listing) inquiry and share etc.;
Channel selection server (Portal): function mainly comprises that channel list presents, channel list renewal, individualized content propelling movement, the customized operation of service package etc.;
Content information distribution platform (CIPP): CIPP is responsible for receiving from outside channel registration request and registering, and the backward Tracker-AS that succeeds in registration notices channel and relevant out of Memory, and CIPP has stored the routing iinformation of all Tracker-AS;
Source server (Source Server, SS): source server provides streaming medium content primary data, is responsible for the functions such as content coding, media format conversion;
Content server (Content Server, CS): function mainly comprises that streaming medium content obtains and processes (section etc.), buffer management, resource bitmap information interaction and management, streaming medium content deletion and reports etc.
The embodiment of the present invention can be by the function of the existing P2P streaming media service platform (Tracker-AS) based on IMS of expansion, increase node location information collecting function and new node proximity arbitration functions more, realize the SBC that accesses based on Peer node (being client node) and the node of P-CSCF information and select optimization method.The collected Peer node location information of Tracker-AS comprises SBC and the P-CSCF information of this Peer node access.
In P2P operation flow, need between Peer node and business platform (Tracker-AS), set up a session (Invite session), Peer node is communicated by letter by between the message such as Info and business platform based on this session, obtains Peer List (node listing).The embodiment of the present invention is in above-mentioned flow process, in session establishment process, Tracker-AS obtains SBC and the PCSCF information of Peer node access, when the request of obtaining Peer List according to Peer node as Tracker-AS is selected service node for this Peer node, the SBC accessing according to this Peer node and PCSCF select service node for this Peer node.
Concrete, the Peer node of request P2P business (as request displaying video) is initiated Invite message to Tracker-AS, this Invite message can be through the SBC access P-CSCF of this Peer node region, P-CSCF sends to I/S-CSCF (inquiry/serving CSCF) by Invite message, and send to Tracker-AS by I/S-CSCF, wherein, when Invite message process SBC and P-CSCF, SBC and P-CSCF can add the identification information of oneself (this identification information can show present position) in Invite message to respectively, thereby make Tracker-AS by Invite message, know the on-position of Peer node, take and select the foundation of service node as Tracker-AS as this Peer node.
The system architecture shown in Fig. 1 take below as example, in conjunction with Fig. 2, being described in Peer node initiates in displaying video request flow process, Tracker-AS collects the positional information of this Peer node and is the flow process that this Peer node is selected service node, wherein, step 201～212nd, Peer node and business platform are set up the flow process of session, step 213～220th, Peer obtains the flow process of Peer List by the session of setting up from business platform.As shown in Figure 2, this flow process can comprise:
Step 201, user sends Invite message by place Peer node to Tracker-AS, to ask displaying video.This Invite message is SIP (Session Initiation Protocol, session initiation protocol) message.
During concrete enforcement, first user can obtain channel list by place Peer node from Portal server, selects to need the video resource of broadcasting according to this channel list.
Step 202, during this Invite message process SBC, SBC adds its identification information in this Invite message to, and the Invite message of adding SBC identification information is sent to Tracker-AS.
During concrete enforcement, SBC is with B2BUA (Back-to-Back User Agent, when back-to-back user agent) mode proxy user sends Invite, can add message header P-Access-Network, and can in this message header, add the sign of SBC, this sign can identify user on-position.Such as, the sign of SBC can be expressed as: sbcx. districts and cities area code is economized abbreviation .networkoperator.com, from the sign of SBC, can find out districts and cities and the province that user accesses.
Step 203, during this Invite message process P-CSCF, P-CSCF adds its identification information in this Invite message to, and the Invite message of adding P-CSCF identification information is sent to Tracker-AS.
During concrete enforcement, P-CSCF, after receiving Invite message, can add the sign of P-CSCF in via head, and this sign can identify user on-position.Such as, this sign can be expressed as: pcscfx. economizes abbreviation .networkoperator.com, can find out the province at user place from this sign.
Step 204, this Invite message sends to Tracker-AS after I/S-CSCF.Tracker-AS receives after Invite message, extracts the sign of SBC and P-CSCF from this message, and sets up the corresponding relation of user and SBC and P-CSCF.
Step 205～208, Tracker-AS returns to the 200OK message of Session Initiation Protocol to this Peer node.
Step 209～212, this Peer node sends confirmation (ACK) message of Session Initiation Protocol to Tracker-AS.
For each, initiate the Peer node of service conversation request (Invite message), by above flow process, Tracker-AS all can obtain the accessing position information of this Peer node, thereby safeguards for recording the database of Peer node identification and this Peer node accessing position information.When the Tracker-AS node that is initiating business request is selected service node, can select node (comprising Peer node or/and Resource Server node) that the Peer node location with initiating business request close on as service node according to this database.
Concrete, when the session of Peer node based on setting up is during to Tracker-AS acquisition request Peer List, further comprising the steps of:
Step 213, Peer node sends Info message to Tracker-AS, with acquisition request Peer List.This Info message is Session Initiation Protocol message.
Step 214～220, this Info message arrives after Tracker-AS, and Tracker-AS selects service node according to the on-position of this Peer node for it, generation Peer List, and be carried on 200OK message and return to this Peer node.
During concrete enforcement, the Peer node that Tracker-AS is initiating business request according to above-mentioned database is selected service node, and notify the Peer node to initiating business request by the information of the service node of selecting, so that the Peer node of initiating business request and these service nodes connect, and obtain requested resource data from these service nodes.
Concrete, Tracker-AS can be the node of initiating business request and selects the CS that has requested resource as service node, can also select to have the Peer node (other Peer node) of requested resource as service node.When selecting service node from Peer node, each node requested resource that can record according to it on the one hand, judges which Peer node has requested resource; On the other hand, can further from these, have the Peer node of institute's request resource according to above-mentioned database, adopt the Peer node that principle is from the near to the remote initiating business request to select service node.Framework based on shown in Fig. 1, its selection principle can be:
When Tracker-AS is the node selection service node of initiating business request, preferentially from the service node of same districts and cities, select service node.During concrete enforcement, Tracker-AS can be according to above-mentioned database, inquire about the accessing position information that these have the Peer node institute corresponding record of institute's request resource, if wherein have the access districts and cities of Peer node identical with the node of this initiating business request access city, the service node of the node using this node as this initiating business request.
If the quantity of the service node in same city is inadequate, will preferentially from the service node in same access province, select service node.During concrete enforcement, Tracker-AS can be according to above-mentioned database, inquire about the accessing position information that these have the Peer node institute corresponding record of institute's request resource, if wherein have the access province of Peer node identical with the access province of the node of this initiating business request, the service node of the node using this node as this initiating business request.
If the service node quantity in same access province is still inadequate, then select service node from the service node in different provinces; If service node quantity or inadequate, then select service node in the service node the system beyond this distributed content dissemination system operator.
In above-mentioned flow process, SBC and P-CSCF, after receiving Invite message, all need to add therein the identification information of oneself.When specific implementation, only SBC or only P-CSCF in Invite message, add identification information, the position that also can make Tracker-AS can learn node access, therefore can also reach object of the present invention to a certain extent.
By above description, can find out, the embodiment of the present invention relies on the SBC of node access or/and P-CSCF is known the position that node accesses, thereby the position of accessing according to user selects the node closing on mutually as service node for this user, improved the accuracy of node proximity judgement, optimized node selecting method, P2P flow between having reduced between districts and cities, having economized, has improved user's experience.
Technical conceive based on identical, the embodiment of the present invention also provides a kind of Tracker-AS that is applied to said system and flow process.
Referring to Fig. 3, the structural representation of the Tracker-AS providing for the embodiment of the present invention.As shown in the figure, this Tracker-AS can comprise:
Node location information collection module 301, for after receiving the service conversation request message of Peer node (as Invite message), obtain the Session Border Controller SBC that wherein carries or/and the identification information of Proxy Call Session Control Function P-CSCF node, described identification information has identified the on-position of described Peer node; Wherein, SBC adds the identification information of self in this service conversation request message when forwarding the service conversation request message of Peer node, or/and P-CSCF node adds the identification information of self in this service conversation request message when forwarding the service conversation request message of Peer node;
Node is selected module 303, for after receiving the business request information of Peer node (as Info message), according to 302 canned datas of memory module, obtain the on-position of each Peer node, according to the on-position of each Peer node, for sending the Peer node of described business request information, select service node, and by the service node list of selecting be carried on response message (as 200OK message) return to send as described in the Peer node of business request information.
Concrete, node selects module 303 when selecting service node, first determine the node that has asked service resources, then within having the range of nodes of asked service resources, according to the on-position of each Peer node, according near to principle far away, for sending the Peer node of described business request information, select service node; Wherein, the node that has asked service resources described in comprises Peer node or/and Resource Server.
Concrete, node selects module 303 to select the principle of service nodes to comprise: in same city, have in the node of asked service resources and select service node; If the quantity of selected service node is inadequate, in same province, has in the node of asked service resources and select service node; If selected service node quantity is still inadequate, in having the node of asked service resources, other province selects service node; If selected service node quantity or not, has the system outside described content delivering system operator network in the node of asked service resources and selects service node.
Concrete, node location information collection module 301 can obtain the identification information of SBC from the message header of the service conversation request message that receives.
Concrete, node location information collection module 301 can obtain the identification information of P-CSCF from the via head of the service conversation request message that receives.
It will be appreciated by those skilled in the art that the module in the device in embodiment can be distributed in the device of embodiment according to embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from the present embodiment.The module of above-described embodiment can be merged into a module, also can further split into a plurality of submodules.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add essential general hardware platform by software and realize, and can certainly pass through hardware, but in a lot of situation, the former is better execution mode.Understanding based on such, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in a storage medium, comprise that some instructions are with so that a station terminal equipment (can be mobile phone, personal computer, server, or the network equipment etc.) carry out the method described in each embodiment of the present invention.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be looked protection scope of the present invention.
Claims (10)
1. the P2P service node system of selection based on IMS, the distributed point-to-point P2P content delivering system for based on IP Multimedia System IMS, is characterized in that, the method comprises:
Tracker application server is after receiving the service conversation request message of Peer node, obtain the Session Border Controller SBC that wherein carries or/and the identification information of Proxy Call Session Control Function P-CSCF node, described identification information has identified the on-position of described Peer node; Wherein, SBC adds the identification information of self in this service conversation request message when forwarding the service conversation request message of Peer node, or/and P-CSCF node adds the identification information of self in this service conversation request message when forwarding the service conversation request message of Peer node;
When Tracker application server receives after the business request information of Peer node, according to the on-position of its each accessed Peer node, for sending the Peer node of described business request information, select service node, and the service node list of selecting is carried on to the Peer node that response message returns to the described business request information of transmission.
2. the method for claim 1, is characterized in that, described according to the on-position of its each accessed Peer node, for sending the Peer node of described business request information, selects service node, comprising:
Tracker application server is determined the node that has asked service resources, and within having the range of nodes of asked service resources, according to the on-position of its each accessed Peer node, according near to principle far away, for sending the Peer node of described business request information, select service node; Wherein, the node that has asked service resources described in comprises Peer node or/and Resource Server.
3. method as claimed in claim 2, is characterized in that, describedly according near to principle far away, for sending the Peer node of described business request information, selects service node, comprising:
In same city, have in the node of asked service resources and select service node;
If the quantity of selected service node is inadequate, in same province, has in the node of asked service resources and select service node;
If selected service node quantity is still inadequate, in having the node of asked service resources, other province selects service node;
If selected service node quantity or not, has the system outside described content delivering system operator network in the node of asked service resources and selects service node.
4. the method for claim 1, is characterized in that, SBC, when forwarding the service conversation request message of Peer node, adds message header, and in this message header, adds the identification information of this SBC oneself in described business request information.
5. the method for claim 1, is characterized in that, P-CSCF, when forwarding the service conversation request message of Peer node, adds the identification information of this P-CSCF oneself in the via of described business request information head.
6. a Tracker application server, is applied to the distributed P 2 P content delivering system based on IMS, it is characterized in that, comprising:
Node location information collection module, for after receiving the service conversation request message of Peer node, obtain the Session Border Controller SBC that wherein carries or/and the identification information of Proxy Call Session Control Function P-CSCF node, described identification information has identified the on-position of described Peer node; Wherein, SBC adds the identification information of self in this service conversation request message when forwarding the service conversation request message of Peer node, or/and P-CSCF node adds the identification information of self in this service conversation request message when forwarding the service conversation request message of Peer node;
Memory module, for preserve that described Dialog processing module gets for the SBC that identifies Peer node on-position or/and the identification information of P-CSCF node;
Node is selected module, for after receiving the business request information of Peer node, according to described memory module institute canned data, obtain the on-position of each Peer node, according to the on-position of each Peer node, for sending the Peer node of described business request information, select service node, and the service node list of selecting is carried on to the Peer node that response message returns to the described business request information of transmission.
7. Tracker application server as claimed in claim 6, it is characterized in that, described node select module specifically for, determine the node that has asked service resources, and within having the range of nodes of asked service resources, according to the on-position of each Peer node, according near to principle far away, for sending the Peer node of described business request information, select service node; Wherein, the node that has asked service resources described in comprises Peer node or/and Resource Server.
8. Tracker application server as claimed in claim 7, is characterized in that, described node select module specifically for, in same city, have in the node of asked service resources and select service node; If the quantity of selected service node is inadequate, in same province, has in the node of asked service resources and select service node; If selected service node quantity is still inadequate, in having the node of asked service resources, other province selects service node; If selected service node quantity or not, has the system outside described content delivering system operator network in the node of asked service resources and selects service node.
9. Tracker application server as claimed in claim 6, is characterized in that, described node location information collection module specifically for, from the message header of the service conversation request message that receives, obtain the identification information of SBC.
10. Tracker application server as claimed in claim 6, is characterized in that, described node location information collection module specifically for, from the via head of the service conversation request message that receives, obtain the identification information of P-CSCF.
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| CN110611919A (en) * | 2018-06-14 | 2019-12-24 | 中兴通讯股份有限公司 | Automatic management method and device for service node, server and storage medium |
| WO2024032213A1 (en) * | 2022-08-11 | 2024-02-15 | 华为技术有限公司 | Communication method, apparatus, and system |
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Application publication date: 20140115 |