WO2008151491A1

WO2008151491A1 - A p2p network system and application method thereof

Info

Publication number: WO2008151491A1
Application number: PCT/CN2007/003761
Authority: WO
Inventors: Xin Zhang; Hongliang Tian; Sui Xiao; Jie Hu
Original assignee: Zte Corporation
Priority date: 2007-06-13
Filing date: 2007-12-25
Publication date: 2008-12-18
Also published as: CN101060455A; CN101060455B

Abstract

A P2P network system and application method thereof, which keeps service operation apart from the working of P2P network, manages and controls the access to P2P and the assignment of resources. Therefore P2P service may be performed on the basis of controllable at both the network side and the terminal side, which makes a comprehensive guarantee on minimizing the influence to the P2P network made by business strategy about operation and the loading of services, and supports multiple modes and services/applications. Meanwhile as the service operation seamlessly integrating with the P2P network, superstratum operation management strategy and understratum P2P operation strategy may map mutually. Further, the behavior of P2P nodes may be controlled by regulating or issuing a strategy. As the network topology of the carrying network is perceivable to the P2P network, it may be used better.

Description

P2P network system and application method thereof

Technical field

The invention relates to an operational and manageable P2P network system supporting multiple business models and different applications and an application method thereof. Background technique

The so-called P2P (Peer to Peer) technology is a peer-to-peer network technology. In a P2P network, the status of each node is equal. It is both a server and a client. Each node enjoys other nodes. The services provided are also serving other nodes.

Since P2P technology makes full use of the computing power of each node, it has great advantages in terms of scalability and construction cost. In recent years, various Internet applications based on P2P technology such as file sharing and streaming media have developed rapidly. P2P download traffic has accounted for more than 70% of the total Internet data traffic in the world. P2P technology has become an important media delivery technology for broadband Internet. There have also been many P2P 3⁄4 frequency application websites based on P2P technology.

However, the current business model of P2P applications on the Internet only relies on membership fees, advertising fees or through the accumulation of traffic for risk investment, lacking a mature continuous profit model; lack of effective management tools in user management, content security, etc. P2P applications infinitely encroach on bandwidth, resulting in flooding of inter-network traffic, bandwidth consumption and serious imbalance of revenue, which caused great controversy in the industry and was once blocked by operators.

The existing P2P technology is implemented by the overlay network. The location of the node in the overlay network is not related to the location of the node in the bearer network, so the proximity service cannot be implemented, and a large amount of cross-region traffic is generated; the search of the media source is on the overlay network. Some nodes implement themselves through certain algorithms, and cannot find the media source with the closest actual distance. The existing P2P application system does not have centralized management and control, and cannot accept the control of the service according to the actual situation of the network. Therefore, the network resources are always utilized to the maximum extent. Other services cause traffic encroachment.

In contrast, the traditional telecom service architecture (C/S architecture) has operational and manageable features, but it cannot utilize terminal resources, and it is difficult to provide sudden and large-scale business growth. The service faces the problem of high construction cost and poor expansion. How to introduce P2P technology in the field of telecommunications, while utilizing its characteristics of adaptive growth and low construction cost, it can solve its defects in operation and management, and provide safe, reliable and stable operational and manageable P2P application solutions have become a hot research topic in the industry, so a secure, reliable, and stable operational and manageable P2P application solution is needed.

In summary, although P2P has a good application prospect due to its shared transmission, users and users can directly serve each other and cannot effectively manage control. Although existing telecommunication networks have a good management mechanism, they need to expand their services. the way. If the two are combined, the T2P access and resource allocation are managed and controlled by the telecommunication network, and the P2P service is realized on the basis of controllable, and the terminal resources are fully utilized, that is, the P2P service is managed by the telecommunication network, and P2P media traffic can be groomed so that users can get services nearby.

Summary of the invention

The technical problem to be solved by the present invention is to provide a P2P network system and an application method thereof. The network scale can be adaptively grown, the construction cost is low, and the safe, reliable, and stable service can be provided while being operable and manageable.

In order to solve the above technical problem, the present invention provides a P2P network application method, including the following steps.

a user terminal accessing the network initiates a P2P network access request to the P2P node management device; b. The P2P node management device checks the P2P network access request of the user terminal, and if it passes the verification, performs the next step;

c. The user terminal accesses the P2P network, and the P2P node management device provides location attribute information for the user terminal;

d. The user terminal successfully logging in to the P2P network initiates a resource query request to the resource management scheduling device, and the user terminals exchange resources.

Further, the method may further include: in the step a, the user terminal accesses a network through a network access device, where the network access device allocates an IP address, and adds information, where the information includes access Device No. Further, the foregoing method may further include: the P2P node management device is configured to provide a function of initializing, registering, and performing subsequent processing, where the user terminal carries the specified IP address and carries the network access device. The additional information initiates a P2P network entry request to the P2P node management device.

Further, the method may further include: in the step b, the user terminal that passes the verification, the P2P node management device, according to the preset policy, and the P2P network access request of the user terminal, The IP address information, or the additional information of the network access device and other information of the user terminal, provide the location information of the user terminal, and the preset policy includes IP address planning.

Further, the method may further include: the resource management scheduling device is configured to centrally manage resource information, status, and capabilities of the node, and accept a resource query request of the node, and allocate a candidate source node thereto.

Further, the method may further include: in the step d, the resource query request carries the location attribute information, and the resource management scheduling device senses the bearer network topology by using the location attribute information.

Further, the method may further include: in the step d, the user terminals further exchange state information, where the location information carries the location attribute information, and the user terminal passes the location attribute information Perceive each other's network location.

Further, the method may further include: the P2P node management device performs a check on the P2P network access request of the user terminal, and if not passed the calibration, rejects the user terminal from accessing the P2P network.

The present invention further provides a network system for implementing a P2P service, including a P2P node management device, a resource management scheduling device, a network access device, and a user terminal;

The network access device is configured to allocate an IP address and additional information to the user terminal according to the access request of the user terminal, where the information includes an access device number;

The P2P node management device is configured to provide a function of initializing, registering, and performing subsequent processing of the node, and verifying the P2P network access request of the user terminal, and if it passes the verification, it is connected. The user terminal entering the P2P network provides location attribute information;

The source management scheduling device is configured to centrally manage the resource information, the state, and the capability of the node, and accept the resource query request of the node that carries the location attribute information, and allocate a candidate source node to the user terminal that successfully logs in to the P2P network. The bearer network topology is sensed through the location attribute information of the terminal.

The P2P node management device is configured according to the preset policy, the IP address information carried in the P2P network access request of the user terminal, or the additional information of the network access device and other information of the user terminal. The user terminal provides the location attribute information, and the preset policy includes an IP address plan.

The user terminals exchange resource and status information, and the location information carries location attribute information, and the user terminals sense each other's network location through the location attribute information.

And the user terminal initiates a P2P network access request to the P2P node management device by using the specified IP address and carrying the additional information of the network access device.

Compared with the prior art, the present invention adopts a P2P network system and an application method thereof. Since the service operation is separated from the operation of the P2P network and simultaneously embodied on the network side and the terminal side, the business strategy and service at the operational level are comprehensively guaranteed. Loading has the least impact on the P2P network and can support multiple business models and services/applications. At the same time, because the business operations are seamlessly integrated with the P2P network, the upper-layer operation management strategy and the underlying P2P operation strategy can be mapped to each other; The adjustment and delivery control of the behavior of the P2P node; the P2P network can sense the topology of the bearer network, and can better utilize the bearer network. BRIEF abstract

1 is a schematic structural diagram of a P2P network application system according to an embodiment of the present invention; FIG. 2 is a schematic diagram of a network side functional entity structure of a P2P network according to an embodiment of the present invention; FIG. 3 is a schematic diagram of an operation management policy mapped to a specific embodiment of the present invention; Schematic diagram of the P2P operational strategy;

4 is a schematic diagram of network topology information of a P2P network-aware bearer network in an embodiment of the present invention; Schematic diagram

FIG. 5 is a flowchart of implementing topology information of a P2P network-aware bearer network according to an embodiment of the present invention. Preferred embodiment of the invention

The invention will be described in detail below with reference to the drawings and specific embodiments.

1 is a schematic structural diagram of a P2P network application system according to an embodiment of the present invention, including a four-layer structure: a service layer system, a P2P management layer system, a media layer system, and a bearer layer system, each layer including multiple devices or systems, Together they perform all the functions required at this level, and the functions between the layers are relatively independent, but interact with each other through specific interfaces, where:

(1) The operation layer system is used to provide all functions at the operational level, including service/application presentation, operation management and support, service/application, media processing, terminal management, P2P policy management, content library, and operator back-end support.

In the operational layer system, the business model related to the business model is refined into specific business process execution; only the published content audited by the operational layer system can ultimately provide services in the P2P network, and ensure the integrity and validity of the content. . The operation layer system also defines and stores various business policies required for the operation of the P2P mechanism as a policy manager and a policy library, including a media processing policy, a node management partition allocation policy, a source query policy, a candidate source selection policy, and a P2P transmission. Control strategy, etc. The policies defined by the operations layer system are ultimately distributed to the P2P management system and media layer systems for use in the execution of related business processes.

The business strategy refers to different algorithms selected by the P2P mechanism at runtime in order to adapt to different business characteristics, such as on-demand, live broadcast, download, and the like. Whenever a new service is added to the network, a new business policy is defined and loaded.

The operational layer system includes the following logical functional entities:

a presentation server for providing users with functions of searching, browsing, and ordering services; a business application system for providing business process control, an application server, and an application client; an operation management system for providing user management and product management for users Operation management support functions such as content management, release management, authentication, and billing, and also provide the policies required for P2P mechanism operation. Slightly define and configure functions;

The P2P policy management module is configured to provide a policy definition and a configuration function required for the P2P mechanism to operate; and a media processing system for providing media processing functions such as media format conversion, slicing, DRM (content digital copyright encryption protection technology);

The terminal management server is configured to provide functions such as detection, download, upgrade, repair, and terminal side policy loading of the terminal software version;

a content library, used as a database, to provide a content source for the system to run;

The operator back-end support system is used to provide back-end support functions for operators such as network management and BSS/OSS (business support system/operation support system).

(2) P2P management system, which is used to provide management support functions required for P2P mechanism operation such as node registration, node registration, node resource management, candidate source node query and allocation; P2P management system as a connection between upper layer application and P2P network The control center is also responsible for translating the operational instructions of the operational layer system into specific P2P management operations, and implementing related P2P management scheduling strategies in specific processing flows.

The P2P management scheduling policy can be pre-defined and configured or delivered by the network administrator in the operation layer system. When a specific event occurs, the P2P management system requests the relevant P2P from the P2P management system according to the preset policy request policy. Manage scheduling policies.

The P2P management system includes three main functional entities: the node management module, the resource scheduling module, and the P2P policy execution module.

The node management module is used to provide functions such as node registration and node registration;

The resource scheduling module is used to provide management support functions required for P2P mechanism operation such as node resource management, candidate source node query and allocation;

The P2P policy execution module is responsible for converting the operation instructions of the operation layer system into specific P2P management operations, and implementing related P2P management scheduling policies in specific processing flows.

(3) The media layer system includes a user terminal that provides a media object and a user terminal that uses the media object, and together constitute a P2P peer-to-peer network.

The operation of the media layer system is independent of the business model, and it has different resources than specific businesses/applications. The source scheduling policy is associated, that is, different service/application clients call different resource scheduling policies, but the basic P2P processing flow and operation mechanism remain unchanged. The specific resource scheduling policy is delivered through the operation layer system.

(4) The bearer layer system includes a network access device for accessing a user, a metropolitan area network, and a backbone network for the metropolitan area interconnection, that is, an IP bearer network.

The bearer layer system is the basis for the normal operation of the P2P mechanism. For the upper layer application and the P2P mechanism, the bearer network is transparent, but the P2P management system can perceive the network topology of the IP bearer network through the access device information carried by the user terminal. information.

The four-layer structure of the above (1) to (4) is a logical hierarchical structure, and the operation layer system, the P2P management layer system, and the media layer system are all built on the bearer layer system. The information exchange between the operation layer system and the P2P management system is performed, so that the operation instructions such as the resource deployment indication and the defined P2P policy are as follows: The P2P node representation algorithm is delivered to the P2P management layer system. The information interaction can be based on the upper layer application protocols of the TCP/IP protocol, such as HTTP (Hypertext Transfer Protocol), SOAP (Simple Object Protocol), etc., or can be defined by itself, such as through the protocol (protocol data unit) of the PDU.

There is information interaction between the P2P management layer system and the media layer system, so that the P2P management layer system performs node management, resource management, and scheduling for P2P nodes. Information interaction between the two layers can generally be based on a connectionless transport layer protocol, such as the UDP protocol (User Datagram Protocol).

The P2P nodes of the media layer system route, transmit, and exchange information through the IP bearer network. The P2P management system or media layer system can record the running log of the node and provide it to the operating layer system as the basis for media layer charging and user incentives.

FIG. 2 illustrates a network-side functional entity structure according to an embodiment of the present invention. Specifically, the network-side system includes a P2P network operation management device. The user terminal is connected to the network side system, and the network side system and the user terminal are configured on the IP bearer network.

The P2P network operation management device is used to provide all functions at the operational level (including service/application presentation, operation support, service/application, media processing, terminal management, etc.); and for providing node registration, node registration, node resource management, and candidate Required for the P2P mechanism such as source node query and allocation The management support function also implements the relevant P2P management scheduling strategy.

The P2P network operation management device includes a terminal management server 101, a media processing system 102, an operation management system 103, a portal subsystem 104, a log server 105, a node management system 106, and a resource management scheduling system 107.

User terminals form a P2P peer-to-peer network.

The terminal management server 101 is configured to provide detection, download, upgrade, repair, and terminal side policy loading of the terminal software version.

The terminal management server 101 includes a P2P policy library module 201 on the terminal side, which may be built in the complete software version of the terminal or in an upgrade package or patch, and exists in the form of a software package, an upgrade package, or a patch; The virus database exists separately. The terminal software and policy library can be loaded into the terminal management server by the system administrator using file upload or direct copy. After the terminal is started, the terminal management server 101 will be first logged in for version detection, updating software and policies.

The media processing system 102 is configured to provide media processing functions such as media format conversion, slicing, DRM encryption processing, and the like.

The media processing system 102 includes a P2P policy module 202 and a media processing module 203.

The media processing module 203 performs media processing according to a policy predetermined by the P2P policy module 202, such as a media conversion format, a slice size, an encryption algorithm, and a media processing manner such as offline, real-time, and the like. In a specific implementation, the policy may exist in a specific media processing flow in the form of parameters, weights, or algorithms.

The operation management system 103 is configured to provide operation management support functions such as user management, product management, content management, release management, authentication, and accounting; and also provides policy definition and configuration functions required for the P2P mechanism to operate.

The operation management system 103 includes an operation management module 204, a P2P policy management module 205, and a P2P policy library module 206 on the network side.

The operation management module 204 is configured to provide operation management support functions of user management, product management, content management, release management, authentication, and accounting.

The P2P policy management module 205 is configured to provide policy definitions and configuration functions required for the P2P mechanism to operate. The P2P policy library module 206 on the network side is used to provide a P2P policy on the network side. In a specific implementation, the P2P policy management module 205 and the P2P policy library module 206 may not exist separately. The P2P policy management module 205 may appear as a function module in a operation management or a function of a certain function module, and the specific P2P A policy may exist in the form of parameters, weights, or algorithms in an operational process, or it may exist as a configuration file. However, regardless of the manner in which the P2P policy management module 205 and the P2P policy library module 206 on the network side exist, the definition and loading of the P2P policy is logically independent from the operational process. In a specific implementation, in the specific embodiment of the present invention, the operation management system 103 can be upgraded and completed on the basis of the existing system, and the P2P policy management module 205 and the P2P policy library module 206 are added to the main work to be completed in the upgrade and transformation. One.

The portal subsystem 104, as a user access point, is used to provide functions such as retrieval, browsing, and ordering of services.

In a particular embodiment of the invention, the terminal may also trigger the acquisition of specific information required to operate the P2P mechanism in interaction with the portal subsystem 104.

The log server 105 is configured to provide collection and analysis functions of various logs in the application system. In a specific embodiment of the present invention, both the network side device and the terminal can provide logs to the log server 105.

The node management system 106 is configured to provide initialization of node registration, registration, and subsequent processing, such as specifying a resource management scheduling system for the session for the node.

The node management system 106 includes two main functional modules: a node management module 206, and a P2P policy module 207. The node management module 206 processes the policy according to the P2P policy module 207, and the policy is embodied in a specific process flow, such as a node registration process, a registration process, and a P2P initialization process, and an algorithm used in the process, such as a node identifier generation algorithm. The allocation algorithm of the resource management scheduling system, and the like. The P2P initialization process refers to an address of a series of functional entities required to specify a P2P operation for a node, such as a resource management scheduling system 107, a terminal management server 101, and the like.

The resource management scheduling system 107 is configured to centrally manage the resource information, status, and capabilities of the node, and accept the resource query request of the node, and allocate a candidate source node for the resource. The resource management scheduling system 107 includes two main functional modules: a resource management scheduling module 208 and a P2P policy module 209. The resource management scheduling module 208 performs related operations according to the policy preset by the P2P policy module 209, and the policy includes a node join/normal exit/abnormal exit processing strategy, a candidate source selection algorithm, an adaptive adjustment policy, and a threshold setting.

The user terminal 108 includes three main functional modules: a service/application client 210, a P2P node module 211, and a P2P policy module 212. The service/application client 210 provides the user with access and use of the service/application; the P2P node module 211 enables the terminal to act as a P2P node, and obtains data from other nodes while also providing data services for other nodes; P2P policy module 212 provides all the policies required by the terminal as a P2P node, including P2P group member management policies, P2P data connections, and transmission policies.

In the specific application network construction and deployment, many strategies are involved. The operation of the system is illustrated by way of example only in the Detailed Description of the Invention.

Figure 3 shows how the operation management policy "guarantee service and local service priority" is mapped to the P2P operation strategy.

The operation management strategy "guarantee service, local service priority" is mapped to the P2P operation strategy, including:

P2P management strategy, including:

Node management policy: "Specify the relevant management device for the node according to the current login area of the node, ensure the localization management of the node, and; P2P resource management scheduling policy: "Resource management for the node under local jurisdiction, and accept the resource query request of the node , providing it with a valid candidate source node for this region.

P2P node policy, including:

P2P data connection and transmission strategy: "In the case of guaranteed service, priority is obtained from local data sources,;

P2P composition management strategy: "In the case of guaranteed services, the replacement of members between local and remote groups is provided in the group member management mechanism."

The strategy illustrated in FIG. 3 is merely an example to explain the mapping relationship between the operation policy and the P2P operation strategy, and illustrates the seamless integration between the upper application system and the P2P network, rather than limitation. Figure 4 illustrates the implementation principle of the topology information of the P2P network-aware bearer network; in the network system that implements the P2P service:

The user terminal sends an access request to the network access device;

The user terminal sends a network access request to the P2P node management device by using the specified IP address and carrying the access device information;

The P2P node management device is configured to provide a function of initializing the registration, registration, and subsequent processing of the node, and verifying the P2P network access request of the user terminal, and if the verification is performed, providing the user terminal accessing the P2P network. Location attribute information;

The user terminal carries the location attribute information, and sends a resource query request to the resource management scheduling device;

The resource management scheduling device is configured to centrally manage the resource information, the state, and the capability of the node, and accept the resource query request of the node that carries the location attribute information, and allocate a candidate source node to the user terminal that successfully logs in to the P2P network, And the network topology is sensed through the location attribute information of the terminal.

The P2P node management device provides the user terminal according to the preset policy, the IP address information carried in the P2P network access request of the user terminal, or the additional information of the network access device and other information of the user terminal. The location attribute information, the preset policy includes an IP address plan.

FIG. 5 illustrates a flow of implementing topology information of a P2P network-aware bearer network according to an embodiment of the present invention, which is specifically as follows.

Step 410: The user terminal accesses the network. The user terminal accesses the network through the network access device, and the network access device allocates an IP address to it, and attaches some information according to the policy, where the information includes the access device number and the like.

Step 420: The user terminal initiates a P2P network access request to the P2P node management device.

The P2P node management device is configured to provide initialization of node registration, registration, and subsequent processing; the user terminal initiates a P2P network access request to the P2P node management device by using the specified IP address and carrying additional information of the network access device.

Step 430: The P2P node management device checks the P2P network intrusion request of the user terminal, and if it passes the verification, performs step 440, otherwise, refuses to access the P2P network;

Step 440: The user terminal accesses the P2P network, and the P2P node management device provides location attribute information for the user terminal.

For the user terminal that passes the verification, the P2P node management device also performs the IP address information carried in the P2P network access request of the user terminal, the information attached to the access device, and the user terminal according to the preset policy, such as IP address planning. Other information, etc. (access device additional information and other information of the user terminal are optional) provide a location attribute information for the user terminal.

Step 450: The user terminal successfully logging in to the P2P network initiates a resource query request to the resource management scheduling device.

The resource management scheduling device is configured to centrally manage the resource information, status, and capabilities of the node, and accept the resource query request of the node, and allocate a candidate source node for the resource.

The user terminal that successfully logs in to the P2P network initiates a resource query request to the resource management scheduling device, and the request carries the location attribute information, and the resource management scheduling device senses the bearer network topology through the location attribute information.

Step 460: Exchange resource and status information between user terminals.

The user terminals exchange resource and status information, and carry the location attribute information in the status information, and the user terminals sense each other's network location through the location attribute information.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope of the present invention. All should be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims. Industrial applicability

The present invention relates to the field of communication network technologies, and is particularly applicable to an operational, manageable P2P network system and applications thereof that support multiple business models and different applications. The invention overcomes the shortcomings that the P2P application cannot effectively manage the control, utilizes the good management mechanism of the existing telecommunication network, expands the implementation manner of the telecommunication service, realizes the P2P service on the basis of realizing the controllable, and fully utilizes the terminal resource, that is, the telecommunication The network manages the P2P service, and can also channel the traffic of the P2P 4 so that the user can get the service nearby.

Claims

Claim

1. A P2P network application method, comprising the following steps,

a user terminal accessing the network initiates a P2P network entry request to the P2P node management device; b. The P2P node management device checks the P2P network entry request of the user terminal, and if it passes the verification, performs the next step;

2. The method according to claim 1, wherein in the step a, the user terminal accesses a network through a network access device, and the network access device allocates an IP address thereto, and attaches information. The information includes an access device number.

The method according to claim 2, wherein the P2P node management device is configured to provide initialization of a node registration, registration, and subsequent processing, and the user terminal carries the specified IP address and carries the The additional information of the network access device initiates a P2P network intrusion request to the P2P node management device.

The method according to claim 1, wherein in the step b, the user terminal that passes the verification, the P2P node management device is based on a preset policy, a user terminal

The IP address information carried in the P2P network access request, or the additional information of the network access device and other information of the user terminal, provide the location attribute information for the user terminal, where the preset policy includes IP address planning .

The method according to claim 1, wherein the resource management scheduling device is configured to centrally manage resource information, status, and capabilities of the node, and accept a resource query request of the node, and allocate a candidate source node for the same. .

The method according to claim 1, wherein in the step d, the resource query request carries the location attribute information, and the resource management scheduling device passes the location attribute Information-aware bearer network topology.

The method according to claim 1, wherein in the step d, the user terminals further exchange state information, and the location information carries the location attribute information, where the user terminal Through this location attribute information, each other's network location is perceived.

The method of claim 1, wherein the step b further comprises: the P2P node management device performing a check on the P2P network access request of the user terminal, and if not passed the calibration, rejecting The user terminal accesses a P2P network.

A network system for implementing a P2P service, which is characterized in that it comprises a P2P node management device, a resource management scheduling device, a network access device, and a user terminal;

The P2P node management device is configured to provide a function of initializing the registration, registration, and subsequent processing of the node, and verifying the P2P network access request of the user terminal, and if it passes the calibration, providing the user terminal accessing the P2P network. Location attribute information;

The resource management scheduling device is configured to centrally manage the resource information, the state, and the capability of the node, and accept the resource query request of the node that carries the location attribute information, and allocate the candidate source node to the user terminal that successfully logs in to the P2P network. The bearer network topology is sensed through the location attribute information of the terminal.

The network system for implementing the P2P service according to claim 9, wherein the P2P node management device, according to the preset policy, the IP address information carried in the P2P network access request of the user terminal, Or the additional information of the network access device and other information of the user terminal provide the location attribute information for the user terminal, where the preset policy includes IP address planning.

The network system for implementing P2P services according to claim 9, wherein the user terminals exchange resource and state information, and the location information carries location attribute information, and the location information is passed between the user terminals. Perceive each other's network location.

12. The network system for implementing P2P services according to claim 10, wherein: The user terminal initiates a P2P network access request to the P2P node management device by using the specified IP address and carrying the additional information of the network access device.