WO2013004134A1 - 一种p2p网络路由方法、节点及系统 - Google Patents

一种p2p网络路由方法、节点及系统 Download PDF

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Publication number
WO2013004134A1
WO2013004134A1 PCT/CN2012/077545 CN2012077545W WO2013004134A1 WO 2013004134 A1 WO2013004134 A1 WO 2013004134A1 CN 2012077545 W CN2012077545 W CN 2012077545W WO 2013004134 A1 WO2013004134 A1 WO 2013004134A1
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Prior art keywords
destination client
node
resource identifier
access node
responsible
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PCT/CN2012/077545
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English (en)
French (fr)
Inventor
李漓春
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中兴通讯股份有限公司
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Publication of WO2013004134A1 publication Critical patent/WO2013004134A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks

Definitions

  • the present invention relates to the field of distributed communication networks, and in particular to a P2P network routing method, node and system. Background technique
  • a peer-to-peer (P2P, Peer to Peer) network is a distributed network that can be used for services such as multimedia sessions and content distribution.
  • the functions and architectures of the P2P networks are different.
  • the P2P network in the background of the embodiments of the present invention has at least resource location and packet routing functions.
  • a widely used Distributed Hash Table (DHT) network, a distributed key/value storage system, and a Resource Locate And Discovery (RELOAD) network belong to this type of P2P network.
  • DHT Distributed Hash Table
  • RELOAD Resource Locate And Discovery
  • RELOAD is a peer-to-peer network resource location and discovery protocol defined by the Internet standards organization IETF.
  • the P2P network architecture is shown in Figure 1.
  • the P2P network consists of peers.
  • the client of the P2P network can use the resource location and packet routing services provided by the P2P network.
  • the P2P network has the message routing function: Each node (the peer node or the client) has a unique identifier (ID); given the destination node identifier, starting from any peer node, the P2P network can report according to its routing algorithm. The text is routed to the destination peer node.
  • ID unique identifier
  • the P2P network has the resource location function: each resource has a unique identifier, and each resource identifier has a responsible peer node; given a specified resource identifier, the P2P network can report according to its routing algorithm from any peer node. The text is routed to the peer node responsible for specifying the resource identifier, thereby requesting operations such as adding, deleting, and modifying the specified resource.
  • the client sends and receives packets through the peer node it serves, and the pair of services for a certain client
  • the node is called the access node (AP, Access Peer) of the client.
  • the client sends a message to the designated node and routes through the access node.
  • the client wants to receive packets from other nodes and route through its access node.
  • a client can have from 1 to multiple access nodes.
  • the method of routing a packet to a client is divided into two processes: routing a packet according to the access node identifier of the client to the access node of the client; the access node of the client, according to the identifier of the destination client, the packet Send to the client. as shown in picture 2:
  • Step 201 The source node (peer node or client) that initiates sending the packet needs to obtain the identifier of the client and its access node identifier. There are many ways to get it. For example, when the P2P network is used for the VoIP application, the client is used by Alice, and the client stores the binding relationship between the user name Alice@example.com and the client routing information (client identifier, client access node identifier). In a P2P network.
  • Steps 202-203 If the source node is a peer node, the source node selects a next hop according to the identifier of the client access node, and sends a packet. If the source node is a client, the source node selects its access node as the next hop. , and send ⁇ .
  • Steps 204-205 the P2P network routes the packet to the access node of the client.
  • Steps 206-207 the client access node routes the packet to the client.
  • the client access node identifier is used when the packet is routed to the client. However, if the client replaces the access node, the client needs to re-advertise the new access node identifier. The routing information, the source node must also regain the client's access node identity. In a dynamic P2P network, access nodes may change frequently, and the acquisition of client routing information consumes a certain amount of time and overhead. In the prior art, the access node identifier update may not be timely, and the packet may not be routed to the client temporarily. Summary of the invention
  • the main purpose of the embodiments of the present invention is to provide a P2P network routing method, a node, and a system, which can solve the problem of large transmission cost of the prior art routing information, and The problem that the update is not timely causes the message to be temporarily unavailable to the client.
  • a peer-to-peer P2P network routing method includes:
  • the source node obtains the resource identifier used to locate the destination client access node, and routes the packet to the destination client based on the resource identifier through the P2P network.
  • the method for routing a packet to a destination client based on the resource identifier is:
  • the source node sends a packet to the P2P network, and the packet is sent to the destination client access node that is responsible for processing the resource identifier by using 0, 1 or more intermediate peer nodes in the P2P network;
  • the destination client access node routes the packet to the destination client according to the destination client identifier.
  • the method for routing a message to a destination client based on the resource identifier is:
  • the source node queries, according to the resource identifier, the P2P network, the destination client access node address that is responsible for processing the resource identifier;
  • the source node After the source node obtains the destination client access node address that is responsible for processing the resource identifier, the source node queries the destination client access node that is responsible for processing the resource identifier according to the destination client identifier to query the destination client address.
  • the source node sends a packet to the destination client according to the destination client address obtained by the query.
  • the method for routing a message to a destination client based on the resource identifier is:
  • the source node queries, according to the resource identifier, the P2P network, the destination client access node address that is responsible for processing the resource identifier;
  • the source node After the source node obtains the address of the destination client access node responsible for processing the resource identifier, the source node sends a message to the destination node.
  • the destination client access node that is responsible for processing the resource identifier routes the packet sent by the source node to the destination client according to the destination client identifier.
  • the source node is a peer node or a client of a P2P network. If the source node is a client, the source node selects its own access node as the next hop; if the source node is a peer node, the source node is based on the source node.
  • the resource identifier selects a next hop peer node according to a P2P algorithm.
  • the destination client is connected to multiple access nodes for which a packet routing service is provided, and each access node is responsible for processing one resource identifier, and load balancing is performed between multiple peer nodes.
  • the source node acquires at least one or more resource identifiers, and different resource identifiers are used to locate different access nodes of the destination client, and only one resource identifier is used in one routing process.
  • the destination client uses the new responsible node of the resource identifier as the new access node.
  • the present invention provides a peer-to-peer P2P network routing system, the system comprising:
  • the source node is configured to obtain the destination client identifier, obtain the resource identifier used to locate the destination client access node, and send the packet to the destination client.
  • An intermediate routing network configured to route, according to the resource identifier, a packet sent by the source node to a destination client;
  • the destination client is configured to receive the packet sent by the source node by using the intermediate routing network.
  • the intermediate routing network includes: an intermediate peer node and a destination client access node;
  • An intermediate peer node configured to receive a packet sent by the source node, where the packet includes a destination client identifier and the resource identifier; the intermediate peer node selects a next hop peer node according to the resource identifier, after one A hop or multi-hop route, routing the packet to the destination client access node responsible for processing the resource identifier; The destination client access node is configured to route the packet to the destination client according to the destination client identifier.
  • the intermediate routing network includes: an intermediate peer node and a destination client access node;
  • the source node queries the intermediate routing network for the destination client access node address responsible for processing the resource identifier according to the resource identifier;
  • the intermediate peer node and the destination client access node are configured to receive and respond to a request sent by the source node to be responsible for processing the destination client access node of the resource identifier;
  • the source node After the source node obtains the destination client access node address that is responsible for processing the resource identifier, the source node queries the destination client access node that is responsible for processing the resource identifier according to the destination client identifier to query the destination client address.
  • the source node sends a packet to the destination client according to the destination client address obtained by the query.
  • the intermediate routing network includes: an intermediate peer node and a destination client access node;
  • the source node queries the intermediate peer node and the destination client access node in the intermediate routing network according to the resource identifier to the destination client access node address responsible for processing the resource identifier; the source node is responsible for processing the resource in the query. After the identified destination client accesses the node address, the packet is sent to the destination client access node that is responsible for processing the resource identifier.
  • the destination client access node that is responsible for processing the resource identifier routes the packet sent by the source node to the destination client according to the destination client identifier.
  • a peer-to-peer P2P network routing node comprising: an obtaining module, configured to acquire a resource identifier for locating a destination client access node, to route the packet to the responsible for processing the resource identifier based on the resource identifier through the P2P network The destination client access node.
  • a peer-to-peer P2P network routing node comprising: a routing module, configured to select a next hop peer node according to the resource identifier, and route the packet to handle the resource after one or more hop routes The destination client access node identified.
  • the client routing scheme of the P2P network in the embodiment of the present invention uses the resource identifier to identify and locate the access node of the client, and does not need to transmit a new access node identifier to the source node when the access node of the destination client is replaced, thereby avoiding the transmission.
  • the problem of overhead avoids the problem that the delivery cannot be routed to the client in time.
  • Figure 1 is a schematic diagram of a peer-to-peer network and its client
  • FIG. 2 is a schematic flowchart of routing a message to a client in the prior art
  • FIG. 3 is a schematic flowchart of routing packets to a client according to Embodiment 1 of the present invention
  • FIG. 4 is a schematic flowchart of routing packets to a client according to Embodiment 2 of the present invention
  • FIG. FIG. 6 is a schematic flowchart of a new responsible node of a resource identifier when a client access node fails according to an embodiment of the present invention.
  • the resource identifier is used to identify and locate the access node of the client.
  • the access node of the destination client is replaced, although the identity of the access node changes, The resource identifier is unchanged, so there is no need to pass the new access node identifier to the source node to avoid the problem of the transmission overhead, and the problem that the delivery cannot be routed to the client is not avoided.
  • the source node first obtains the identifier of the destination client and the resource identifier of the access node used to locate the destination client, and provides the obtained destination client identifier and resource identifier to the peer P2P.
  • the network the P2P network routes the message according to the resource identifier to the destination client access node that is responsible for processing the resource identifier.
  • the P2P network client can connect one or more to provide packet routing
  • each access node is only responsible for processing one resource identifier, that is, each resource identifier corresponds to only one client access node, and load sharing can be implemented between multiple access nodes.
  • the source node may obtain one or more resource identifiers, but only one resource identifier is used in one routing process.
  • the method for generating the resource identifier may be generated in a random manner, or may be generated according to a certain rule according to the identifier of the client, for example, after selecting an appropriate AP according to conditions such as load or distance, and then identifying the resource identifier from the AP. Select a resource identifier as the resource identifier for locating the AP.
  • the resource identifier may be assigned to the peer node according to the prefix matching manner. For example, if the resource identifier length is greater than the AP node identifier length, the node identifier of the AP is supplemented with 0 as the resource identifier used to locate the AP node.
  • FIG. 3 is a schematic flowchart of a method for routing a packet from a source node to a destination client according to Embodiment 1 of the present invention.
  • the method is configured to forward a packet to a destination client, where the process includes: Step 301: Source node acquisition destination The identity of the client and the resource identifier of the access node used to locate the destination client.
  • the method for the source node to obtain the destination client identifier from the P2P network and the resource identifier of the access node for locating the destination client may be in various manners.
  • the destination client is used by the user U1.
  • the destination client stores the binding relationship between the user name Ul@example.com and the destination client routing information as a resource in the P2P network, where the routing information includes the destination client identifier and the access node of the destination client.
  • the resource identifier, the source node obtains the routing information from the P2P network, and obtains the destination client identifier and the resource identifier of the access node that locates the destination client.
  • Step 302 If the source node is a client, the source node selects the own access node as the next hop; if the source node is the peer node, the source node selects the next hop peer node according to the resource identifier according to the P2P algorithm.
  • the P2P algorithm for selecting the next hop peer node can use Chord, Pastry, and the like.
  • the P2P network routes the message according to the resource identifier to the client access node responsible for processing the resource identifier according to the P2P algorithm. If the source node is a peer node in the P2P network, in the case that it knows the path of the client access node responsible for processing the resource identifier, step 304 to 305 need not be performed, and the source node can directly send the message. A client access node responsible for processing the resource identification.
  • the peer node on the routing path in the P2P network needs to select the next hop according to the resource identifier, and the rule for selecting the next hop can be summarized.
  • the distance There are several ways to calculate the distance. For example, the more the same number of bits as the resource identifier prefix, the closer the node identification distance.
  • Step 303 The source node sends a message to the next hop peer node selected in step 302, where the message includes the destination client identifier and the resource identifier of the access node of the destination client.
  • Steps 304 - 305 The peer node in the P2P network selects the next hop according to the resource identifier, and finally forwards the packet to the access node of the destination client that is responsible for processing the resource identifier, and the forwarding packet includes the destination client identifier. And resource identification.
  • Step 306 The destination client access node that is responsible for processing the resource identifier queries the next hop address according to the destination client identifier, thereby obtaining the destination client address.
  • Step 307 The access node of the destination client responsible for processing the resource identifier forwards the packet to the destination client according to the obtained destination client address.
  • FIG. 4 is a schematic flowchart of another method for routing a packet from a source node to a destination client according to an embodiment of the present invention.
  • the method first queries an destination client access node address and a destination client. Address, and then send the message to the destination client.
  • the process includes:
  • Step 401 The source node obtains the identifier of the destination client and the resource identifier of the access node used to locate the destination client.
  • Step 402 If the source node is a client, the source node selects its own access node as the next hop; if the source node is a peer node, the source node presses the resource identifier of the access node according to the destination client.
  • the P2P algorithm selects the next hop peer node.
  • Steps 403 - 404 The source node queries the next hop peer node obtained in step 402 to the next hop peer node on the path of the destination client access node responsible for processing the resource identifier, and the source node obtains step 402.
  • the next hop node provides a resource identifier for querying;
  • the source node queries the peer node A for the next hop address of the destination peer B.
  • the peer node B is the resource identifier of the destination client C, if the peer is equal.
  • Steps 405 - 406 repeat the previous step process until the access node of the destination client responsible for processing the resource identifier is found;
  • the source node queries the peer node A to the next hop as the peer node B, and the source node continues to query the peer node B for the next destination client access node that is responsible for processing the resource identifier.
  • the peer node B that receives the query confirms that it is the destination client access node responsible for processing the resource identifier, step 407 is performed.
  • Steps 407 ⁇ 408 The source node queries the destination client access node that is responsible for processing the resource identifier to query the next hop address according to the destination client identifier, thereby obtaining the destination client address.
  • Step 409 The source node sends a message to the destination client according to the obtained destination client address.
  • FIG. 5 is a schematic diagram of another packet according to Embodiment 3 of the present invention, which is routed from a source node to a destination client.
  • the method flow diagram is as follows: The method first queries the destination client access node address, and then forwards the packet to the destination client through the destination client access node, and the process includes:
  • Step 501 The source node obtains the identifier of the destination client and the resource identifier of the access node used to locate the destination client.
  • Step 502 The source node selects its own access node A or the next hop peer node A selected according to the P2P algorithm according to the resource identifier, and sends a query to the peer node A to query the destination client access node that is responsible for processing the resource identifier.
  • Step 503 After receiving the request, the peer node A determines that it is not the destination client access node responsible for processing the resource identifier, and proceeds to the next route on the destination client access node that is responsible for processing the resource identifier. Skip forwarding the query request until the query request arrives at the destination client access node B responsible for processing the resource identifier;
  • Step 504 According to the routing path, the peer node B returns its own address to the source node.
  • Step 507 The peer node B queries the destination client address according to the destination client identifier, and forwards the packet to the destination client.
  • Step 601 The client detects that the access node B that is located by using the resource identifier is invalid.
  • Step 606 The client establishes a connection with the new peer node in the previous step, and uses the peer node as a new access node.
  • the embodiment Based on the Peer-to-Peer P2P network routing method provided by the specific embodiment 1, the embodiment correspondingly provides a P2P network routing system, where the system includes: a source node, an intermediate routing network, and a destination client;
  • the source node is configured to obtain the destination client identifier, obtain the resource identifier used to locate the destination client access node, and send the packet to the destination client.
  • the source node obtains at least one or more resource identifiers, and different resource identifiers are used to locate different access nodes of the destination client. In one routing process, only one resource identifier is used.
  • An intermediate routing network configured to route, according to the resource identifier, a packet sent by the source node to a destination client;
  • the destination client is configured to receive the packet sent by the source node by using the intermediate routing network.
  • the intermediate routing network further includes: an intermediate peer node and a destination client access node; and an intermediate peer node, configured to receive a packet sent by the source node, where the packet includes a destination client identifier and the resource identifier The intermediate peer node selects the next hop peer node according to the resource identifier, and routes the packet to the destination client access node responsible for processing the resource identifier after one or more hop routes;
  • the intermediate route network may not include the intermediate peer node, that is, The source node directly sends a message to the client access node responsible for processing the resource identifier without forwarding the intermediate peer node.
  • the destination client access node is configured to route the packet to the destination client according to the destination client identifier.
  • the source node is configured to obtain the destination client identifier, obtain the resource identifier of the client access node for locating the destination client, and send the packet to the destination client.
  • the source node obtains at least one or more resource identifiers and different resources. Identifies the different access nodes used to locate the destination client. Only one resource identifier is used in one routing.
  • An intermediate routing network configured to route, according to the resource identifier, a packet sent by the source node to a destination client;
  • the destination client is configured to receive the packet sent by the source node by using the intermediate routing network.
  • the intermediate routing network further includes: an intermediate peer node and a destination client access node; the source node queries the intermediate routing network for the destination client access node address responsible for processing the resource identifier according to the resource identifier;
  • the intermediate peer node and the destination client access node are configured to receive and respond to a request sent by the source node to be responsible for processing the destination client access node of the resource identifier;
  • the source node After the source node obtains the destination client access node address that is responsible for processing the resource identifier, the source node queries the destination client access node that is responsible for processing the resource identifier according to the destination client identifier to query the destination client address.
  • the source node sends a packet to the destination client according to the destination client address obtained by the query.
  • the source node in turn sends a query request to the intermediate peer node until a response is received to the destination client access node that is responsible for processing the resource identifier.
  • the intermediate route network may not include the intermediate peer node, that is, The source node directly sends a query request message to the client access node that is responsible for processing the resource identifier. After receiving the acknowledgement response, the source node directly sends the query destination client address to the destination client access node that is responsible for processing the resource identifier. request.
  • a P2P network routing system comprising: a source node, an intermediate routing network, and a destination client;
  • the source node is configured to obtain the destination client identifier, obtain the resource identifier of the client access node for locating the destination client, and send the packet to the destination client.
  • the source node obtains at least one or more resource identifiers and different resources. Identifies the different access nodes used to locate the destination client. Only one resource identifier is used in one routing.
  • An intermediate routing network configured to route, according to the resource identifier, a packet sent by the source node to a destination client;
  • the destination client is configured to receive the packet sent by the source node by using the intermediate routing network.
  • the intermediate routing network further includes: an intermediate peer node and a destination client access node; the source node queries the intermediate peer node and the destination client access node in the intermediate routing network to process the resource according to the resource identifier The destination client access node address is identified; the source node sends a message to the destination client access node that is responsible for processing the resource identifier after querying the destination client access node address that is responsible for processing the resource identifier;
  • the destination client access node that is responsible for processing the resource identifier routes the packet sent by the source node to the destination client according to the destination client identifier.
  • the intermediate route network may not include the middle.
  • the peer node ie, the source node, sends a message directly to the destination client access node responsible for processing the resource identifier.
  • the functional modules or functional units included in the foregoing system are all configured to implement the steps in the foregoing method embodiments, and the functions thereof can be directly from the step flow of the foregoing method embodiments.
  • the function module or the execution unit that can be extracted or derived from the foregoing method embodiments should be within the protection scope of the system embodiment of the present invention. To save space, no further details are provided herein.
  • the embodiment of the present invention further provides a peer P2P network routing node, which is specifically a source node, and includes: an obtaining module, configured to acquire a resource identifier used for locating a destination client access node, to use the P2P network, based on the resource The identity routes the message to the destination client access node responsible for processing the resource identity.
  • a peer P2P network routing node which is specifically a source node, and includes: an obtaining module, configured to acquire a resource identifier used for locating a destination client access node, to use the P2P network, based on the resource The identity routes the message to the destination client access node responsible for processing the resource identity.
  • the embodiment of the present invention further provides a peer P2P network routing node, which is an intermediate peer node, and includes: a routing module, configured to select a next hop peer node according to the resource identifier, and report the hop by one or more hops. The text is routed to the destination client access node responsible for processing the resource identifier.
  • a routing module configured to select a next hop peer node according to the resource identifier, and report the hop by one or more hops. The text is routed to the destination client access node responsible for processing the resource identifier.

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Abstract

本发明实施例公开了一种P2P网络路由方法、节点及系统,能够解决现有技术路由信息传递开销大,以及由于接入节点标识更新不及时导致暂时无法路由报文至客户端的问题。本发明实施例采用资源标识来标识和定位客户端的接入节点,在目的客户端的接入节点更换时不需要传递新的接入节点标识给源节点,避免了传递开销的问题,避免了传递不及时造成无法路由报文到客户端的问题。

Description

一种 P2P网络路由方法、 节点及系统 技术领域
本发明涉及分布式通信网络领域, 特别是指一种 P2P网络路由方法、 节点及系统。 背景技术
对等(P2P, Peer to Peer )网络是一种分布式网络, 可用于多媒体会话、 内容分发等业务。
各类 P2P网络的功能和架构不一, 本发明实施例背景的 P2P网络至少 具备资源定位和报文路由功能。应用广泛的分布式哈希表( DHT, Distributed Hash Table ) 网络、 分布式键值 ( key/value )存储系统、 资源定位与发现 ( RELOAD, Resource Locate And Discovery ) 网络即属于该类 P2P网络。 RELOAD是互联网标准组织 IETF定义的一种对等网络的资源定位和发现 协议。
P2P网络架构如图 1所示, P2P网络由对等节点 (peer )组成, P2P网 络的客户端 (client )可使用 P2P网络提供的资源定位和报文路由服务。
P2P网络具备报文路由功能: 每个节点(对等节点或客户端)都有唯一 标识(ID ); 给定目的节点标识, 从任何一个对等节点出发, P2P网络能根 据其路由算法将报文路由至目的对等节点。
P2P网络具备资源定位功能:每个资源都有唯一的标识,每个资源标识 有负责的对等节点; 给定指定资源标识, 从任何一个对等节点出发, P2P 网络能根据其路由算法将报文路由到负责指定资源标识的对等节点, 从而 请求对指定资源进行增删查改等操作。
客户端通过为其服务的对等节点收发报文, 为某个客户端的服务的对 等节点被称为该客户端的接入节点(AP, Access Peer )0 客户端要发送报文 给指定节点, 通过其接入节点路由。 客户端要接收来自其他节点的报文, 通过其接入节点路由。 一个客户端可有 1个至多个接入节点。
现有技术中, 向客户端路由报文的方法分为两个过程: 根据客户端的 接入节点标识路由报文到客户端的接入节点; 客户端的接入节点根据目的 客户端的标识, 将报文发送至客户端。 如图 2所示:
步驟 201 , 发起发送报文的源节点(对等节点或客户端)要获得客户端 的标识及其接入节点标识。 获得的方法有多种。 比如, P2P网络用于网络电 话应用时, 客户端由 Alice使用, 客户端将用户名 Alice@example.com与客 户端路由信息(客户端标识、客户端的接入节点标识)的绑定关系存入 P2P 网络中。
步驟 202-203 , 如果源节点是对等节点, 源节点根据客户端接入节点标 识选择下一跳, 并发送报文; 如果源节点是客户端, 源节点选择其接入节 点作为下一跳, 并发送 ·^艮文。
步驟 204-205 , P2P网络将报文路由至客户端的接入节点。
步驟 206-207 , 客户端接入节点将报文路由至客户端。
现有技术在路由报文至客户端时, 依赖客户端接入节点标识, 但由于 接入节点退出等原因, 如果客户端更换接入节点, 则客户端需要重新发布 其包含新接入节点标识的路由信息, 源节点也必须重新获得客户端的接入 节点标识。 在动态的 P2P网络中, 接入节点变化可能较为频繁, 而客户端 路由信息的发布获取需要消耗一定时间和开销。 现有技术还可能会出现接 入节点标识更新不及时情况, 从而暂时造成无法将报文路由到客户端。 发明内容
有鉴于此,本发明实施例的主要目的在于提供一种 P2P网络路由方法、 节点及系统, 能够解决现有技术路由信息传递开销大, 以及由于接入节点 标识更新不及时导致暂时无法路由报文至客户端的问题。
为解决上述技术问题, 本发明实施例的技术方案是这样实现的: 一种对等 P2P网络路由方法, 该方法包括:
源节点获取用于定位目的客户端接入节点的资源标识,通过 P2P网络, 基于所述资源标识将报文路由至目的客户端。
优选地, 基于本发明一实施例, 所述基于所述资源标识将报文路由至 目的客户端的方法为:
源节点发送报文给 P2P网络, 通过 P2P网络中的 0个、 1个或多个中 间对等节点将报文路由至负责处理所述资源标识的目的客户端接入节点; 负责处理该资源标识的目的客户端接入节点依据所述目的客户端标识 将报文路由至目的客户端。
优选地, 基于本发明另一实施例, 所述基于所述资源标识将报文路由 至目的客户端的方法为:
源节点依据所述资源标识向 P2P网络查询负责处理所述资源标识的目 的客户端接入节点地址;
源节点在查询获得负责处理所述资源标识的目的客户端接入节点地址 后, 依据目的客户端标识向负责处理所述资源标识的目的客户端接入节点 查询目的客户端地址;
源节点依据查询获得的目的客户端地址向目的客户端发送报文。
优选地, 基于本发明另一实施例, 所述基于所述资源标识将报文路由 至目的客户端的方法为:
源节点依据所述资源标识向 P2P网络查询负责处理所述资源标识的目 的客户端接入节点地址;
源节点在查询获得负责处理所述资源标识的目的客户端接入节点地址 后, 向其发送艮文; 负责处理所述资源标识的目的客户端接入节点依据目的客户端标识将 源节点发送的报文路由至目的客户端。
优选地, 所述源节点为对等节点或 P2P网络的客户端, 如果源节点是 客户端, 则源节点选择自身接入节点作为下一跳; 如果源节点是对等节点, 则源节点根据所述资源标识按 P2P算法选择下一跳对等节点。
优选地, 所述目的客户端连接多个为其提供报文路由服务的接入节点, 每个接入节点负责处理一个资源标识, 多个对等节点之间执行负荷分担。
优选地, 所述源节点获取至少一个或多个资源标识, 不同的资源标识 用于定位目的客户端的不同接入节点, 一次路由过程中, 只使用一个资源 标识。
优选地, 当负责处理所述资源标识的目的客户端接入节点失效时, 目 的客户端将所述资源标识的新的负责节点作为新的接入节点。
基于本发明实施例, 本发明提出一种对等 P2P网络路由系统, 该系统 包括:
源节点, 用于获取目的客户端标识及获取用于定位目的客户端接入节 点的资源标识, 并向目的客户端发送报文;
中间路由网络, 用于基于所述资源标识将源节点发送的报文路由至目 的客户端;
目的客户端, 用于通过中间路由网络接收源节点发送的报文。
优选地, 基于本发明一实施例, 所述中间路由网络包括: 中间对等节 点和目的客户端接入节点;
中间对等节点, 用于接收源节点发送的报文, 所述报文中包含目的客 户端标识及所述资源标识; 中间对等节点依据所述资源标识选择下一跳对 等节点, 经过一跳或多跳路由, 将报文路由至负责处理该资源标识的目的 客户端接入节点; 目的客户端接入节点, 用于依据目的客户端标识将报文路由至目的客 户端。
优选地, 基于本发明另一实施例, 所述中间路由网络包括: 中间对等 节点和目的客户端接入节点;
源节点依据资源标识向中间路由网络查询负责处理所述资源标识的目 的客户端接入节点地址;
中间对等节点和目的客户端接入节点用于接收和响应源节点发送的查 询负责处理所述资源标识的目的客户端接入节点的请求;
源节点在查询获得负责处理所述资源标识的目的客户端接入节点地址 后, 依据目的客户端标识向负责处理所述资源标识的目的客户端接入节点 查询目的客户端地址;
源节点依据查询获得的目的客户端地址向目的客户端发送报文。
优选地, 基于本发明另一实施例, 所述中间路由网络包括: 中间对等 节点和目的客户端接入节点;
源节点依据所述资源标识向中间路由网络中的中间对等节点和目的客 户端接入节点查询负责处理所述资源标识的目的客户端接入节点地址; 源节点在查询获得负责处理所述资源标识的目的客户端接入节点地址 后, 向负责处理所述资源标识的目的客户端接入节点发送报文;
负责处理所述资源标识的目的客户端接入节点依据目的客户端标识将 源节点发送的报文路由至目的客户端。
一种对等 P2P网络路由节点, 包括: 获取模块, 用于获取用于定位目 的客户端接入节点的资源标识, 以通过 P2P网络, 基于所述资源标识将报 文路由至负责处理该资源标识的目的客户端接入节点。
一种对等 P2P网络路由节点, 包括: 路由模块, 用于依据资源标识选 择下一跳对等节点, 经过一跳或多跳路由, 将报文路由至负责处理该资源 标识的目的客户端接入节点。
本发明实施例 P2P网络的客户端路由方案, 采用资源标识来标识和定 位客户端的接入节点, 在目的客户端的接入节点更换时不需要传递新的接 入节点标识给源节点, 避免了传递开销的问题, 避免了传递不及时造成无 法路由报文到客户端的问题。 附图说明
图 1为对等网络及其客户端的示意图;
图 2为现有技术中路由报文至客户端的流程示意图;
图 3为本发明实施例 1提供的路由报文至客户端的流程示意图; 图 4为本发明实施例 2提供的路由报文至客户端的流程示意图; 图 5为本发明实施例 3提供的路由报文至客户端的流程示意图; 图 6为本发明实施例提供的客户端接入节点失效时, 客户端将资源标 识的新负责节点作为新接入节点流程示意图。 具体实施方式
本发明实施例的基本思想为: 在 P2P网络报文路由过程中, 采用资源 标识来标识和定位客户端的接入节点, 在目的客户端的接入节点更换时, 虽然接入节点标识发生变化, 但资源标识不变, 因此不需要传递新的接入 节点标识给源节点, 以避免传递开销的问题, 并能够避免传递不及时造成 无法路由报文到客户端的问题。
本发明实施例提供的 P2P网络路由方法中, 源节点首先获取目的客户 端的标识和用于定位目的客户端的接入节点的资源标识, 并将获取的目的 客户端标识和资源标识提供给对等 P2P网络, P2P网络依据所述资源标识 路由报文至负责处理该资源标识的目的客户端接入节点。
本发明实施例中, P2P网络客户端可连接一个或多个为其提供报文路由 服务的接入节点, 每个接入节点只负责处理一个资源标识, 即每个资源标 识只对应一个客户端接入节点, 多个接入节点之间可实现负荷分担。 相应 地, 在获取目的客户端的标识和用于定位目的客户端接入节点的资源标识 时, 源节点可获取一个或多个资源标识, 但一次路由过程中, 只使用一个 资源标识。
本发明实施例中, 资源标识的生成方式可以采用随机方式生成, 也可 以根据客户端的标识按一定规则生成, 例如根据负载或距离远近等条件选 择合适的 AP后, 再从该 AP负责的资源标识中选择一个资源标识作为定位 该 AP的资源标识。可按前缀匹配方式为对等节点分配资源标识, 例如在资 源标识长度大于 AP节点标识长度的情况下, 将 AP的节点标识后补 0作为 用于定位该 AP节点的资源标识。
为使本发明的目的、 技术方案和优点更加清楚明白, 以下举具体实施 例并参照附图, 对本发明进一步详细说明。
具体实施例 1
图 3为本发明实施例 1提供的一种报文从源节点路由到目的客户端的 方法流程示意图, 该方法以转发来路由报文到目的客户端, 该流程包括: 步驟 301 :源节点获取目的客户端的标识和用于定位目的客户端的接入 节点的资源标识。
所述源节点从 P2P网络获取目的客户端标识和用于定位目的客户端的 接入节点的资源标识的方法有多种方式, 例如, 当 P2P网络用于网络电话 应用时,目的客户端由用户 U1使用,目的客户端将用户名 Ul @example.com 与目的客户端路由信息的绑定关系作为资源存入 P2P网络中, 所述路由信 息包含有目的客户端标识及定位目的客户端的接入节点的资源标识, 源节 点从 P2P网络中获取到路由信息即可获取到目的客户端标识及定位目的客 户端的接入节点的资源标识。 步驟 302:如果源节点是客户端,源节点选择自身接入节点作为下一跳; 如果源节点是对等节点, 源节点根据所述资源标识按 P2P算法选择下一跳 对等节点。
选择下一跳对等节点的 P2P算法可以采用 Chord、 Pastry等等。 P2P网 络依据所述资源标识, 按 P2P算法路由报文到负责处理所述资源标识的客 户端接入节点。 如果源节点为 P2P网络中的一个对等节点, 在其知道到负 责处理所述资源标识的客户端接入节点的路径的情况下, 不需要执行步驟 304至 305 , 源节点可直接发送报文给负责处理所述资源标识的客户端接入 节点。在源节点为 P2P网络客户端或需要 P2P网络经过多跳路由的情况下, 则 P2P网络中路由路径上的对等节点需要依据所述资源标识选择下一跳, 选择下一跳的规则可归纳为: 选择本地路由表中节点标识 "距离" 所述资 源标识最近的节点。 计算距离的方法可以有多种, 例如, 与资源标识前缀 相同位数越多的节点标识距离越近。
步驟 303: 源节点发送报文至步驟 302选择的下一跳对等节点, 所述报 文中包含目的客户端标识及目的客户端的接入节点的资源标识。
步驟 304 - 305: P2P网络中的对等节点依据所述资源标识选择下一跳, 将报文最终转发到负责处理该资源标识的目的客户端的接入节点, 转发报 文中包含目的客户端标识及资源标识。
步驟 306: 负责处理该资源标识的目的客户端接入节点根据目的客户端 标识查询下一跳地址, 从而获得目的客户端地址。
步驟 307: 负责处理该资源标识的目的客户端的接入节点依据获得的目 的客户端地址转发报文至目的客户端。
具体实施例 2
图 4为本发明实施例 提供的另一种报文从源节点路由到目的客户端 的方法流程示意图, 该方法先查询目的客户端接入节点地址、 目的客户端 地址, 再发送报文到目的客户端, 该流程包括:
步驟 401:源节点获取目的客户端的标识和用于定位目的客户端的接入 节点的资源标识。
步驟 402:如果源节点是客户端,源节点选择自身接入节点作为下一跳; 如果源节点是对等节点, 源节点根据目的客户端的接入节点的资源标识按
P2P算法选择下一跳对等节点。
步驟 403 - 404: 源节点向步驟 402获得的下一跳对等节点查询到达负 责处理所述资源标识的目的客户端接入节点的路径上的下一跳对等节点, 源节点向步驟 402获得的下一跳节点提供资源标识以进行查询;
如图 4所示, 即源节点向对等节点 A查询到达目的对等节点 B的下一 跳地址, 该实施例中对等节点 B即为目的客户端 C的资源标识负责节点, 若对等节点 A与对等节点 B之间还存在对等节点 D, 则对等节点 A查询到 的下一跳对等节点应为节点 D。
步驟 405 - 406: 重复上一步驟过程, 直到找到负责处理所述资源标识 的目的客户端的接入节点;
如图 4所示, 源节点通过对等节点 A查询到下一跳为对等节点 B, 源 节点继续向对等节点 B查询到达负责处理所述资源标识的目的客户端接入 节点的下一跳, 当接收到查询的对等节点 B确认自身即为负责处理所述资 源标识的目的客户端接入节点时, 则执行步驟 407。
步驟 407 ~ 408: 源节点依据目的客户端标识向负责处理所述资源标识 的目的客户端接入节点查询下一跳地址, 从而获得目的客户端地址。
步驟 409: 根据所获得的目的客户端地址, 源节点发送报文到目的客户 端。
具体实施例 3
图 5为本发明实施例 3提供的另一种报文从源节点路由到目的客户端 的方法流程示意图, 该方法先查询目的客户端接入节点地址, 再通过目的 客户端接入节点转发报文到目的客户端, 该流程包括:
步驟 501 :源节点获取目的客户端的标识和用于定位目的客户端的接入 节点的资源标识。
步驟 502: 源节点选择自身接入节点 A或根据所述资源标识按 P2P算 法选择的下一跳对等节点 A, 向对等节点 A发送查询负责处理所述资源标 识的目的客户端接入节点的请求;
步驟 503: 对等节点 A接收到请求后, 判断自身不是负责处理所述资 源标识的目的客户端接入节点, 向到达负责处理所述资源标识的目的客户 端接入节点路由路径上的下一跳转发查询请求, 直到查询请求到达负责处 理所述资源标识的目的客户端接入节点 B;
步驟 504: 依路由路径, 对等节点 B向源节点返回自身的地址; 步驟 506:源节点依据查询获得的负责处理所述资源标识的目的客户端 接入节点 B的地址, 发送报文到对等节点 B。
步驟 507: 对等节点 B依据目的客户端标识查询目的客户端地址, 并 转发报文至目的客户端。
在本发明提供的上述实施例中, 客户端的接入节点失效时, 客户端将 资源标识的新负责节点作为新接入节点。更换接入节点的一个实施例如图 6 所示, 该流程包括:
步驟 601 : 客户端检测到使用某资源标识定位的接入节点 B失效; 步驟 602-605: 客户端向对等网络查询负责处理所述资源标识的目的客 户端接入节点, 获得负责处理所述资源标识的新的对等节点地址;
步驟 606: 客户端与上步驟所述新对等节点建立连接,将该对等节点作 为新的接入节点。
具体实施例 4 基于具体实施例 1提供的对等 P2P网络路由方法, 该实施例相应地提 供了一种 P2P网络路由系统, 该系统包括: 源节点、 中间路由网络、 目的 客户端; 其中,
源节点, 用于获取目的客户端标识及获取用于定位目的客户端接入节 点的资源标识, 并向目的客户端发送报文;
所述源节点获取至少一个或多个资源标识, 不同的资源标识用于定位 目的客户端的不同接入节点, 一次路由过程中, 只使用一个资源标识。
中间路由网络, 用于基于所述资源标识将源节点发送的报文路由至目 的客户端;
目的客户端, 用于通过中间路由网络接收源节点发送的报文。
所述中间路由网络进一步包括: 中间对等节点和目的客户端接入节点; 中间对等节点, 用于接收源节点发送的报文, 所述报文中包含目的客 户端标识及所述资源标识; 中间对等节点依据所述资源标识选择下一跳对 等节点, 经过一跳或多跳路由, 将报文路由至负责处理该资源标识的目的 客户端接入节点;
当源节点为 P2P网络中的一个对等节点时, 在其知道到负责处理所述 资源标识的客户端接入节点的路径的情况下, 所述中间路由网络也可不包 含中间对等节点, 即不经过中间对等节点的转发, 源节点直接发送报文给 负责处理所述资源标识的客户端接入节点。
目的客户端接入节点, 用于依据目的客户端标识将报文路由至目的客 户端。
具体实施例 5
基于具体实施例 2提供的对等 P2P网络路由方法, 该实施例相应地提 供了一种 P2P网络路由系统, 该系统包括: 源节点、 中间路由网络、 目的 客户端; 源节点, 用于获取目的客户端标识及获取用于定位目的客户端接入节 点的资源标识, 并向目的客户端发送报文; 所述源节点获取至少一个或多 个资源标识, 不同的资源标识用于定位目的客户端的不同接入节点, 一次 路由过程中, 只使用一个资源标识。
中间路由网络, 用于基于所述资源标识将源节点发送的报文路由至目 的客户端;
目的客户端, 用于通过中间路由网络接收源节点发送的报文。
所述中间路由网络进一步包括: 中间对等节点和目的客户端接入节点; 源节点依据资源标识向中间路由网络查询负责处理所述资源标识的目 的客户端接入节点地址;
中间对等节点和目的客户端接入节点用于接收和响应源节点发送的查 询负责处理所述资源标识的目的客户端接入节点的请求;
源节点在查询获得负责处理所述资源标识的目的客户端接入节点地址 后, 依据目的客户端标识向负责处理所述资源标识的目的客户端接入节点 查询目的客户端地址;
源节点依据查询获得的目的客户端地址向目的客户端发送报文。
该实施例中, 源节点依次向中间对等节点发送查询请求, 直到获得负 责处理所述资源标识的目的客户端接入节点的响应为止。 当源节点为 Ρ2Ρ 网络中的一个对等节点时, 在其知道到负责处理所述资源标识的客户端接 入节点的路径的情况下, 所述中间路由网络也可不包含中间对等节点, 即 源节点直接发送查询请求报文给负责处理所述资源标识的客户端接入节 点, 得到确认响应后, 源节点向负责处理所述资源标识的目的客户端接入 节点直接发送查询目的客户端地址请求。
具体实施例 6
基于具体实施例 3提供的对等 Ρ2Ρ网络路由方法, 该实施例相应地提 供了一种 P2P网络路由系统, 该系统包括: 源节点、 中间路由网络、 目的 客户端;
源节点, 用于获取目的客户端标识及获取用于定位目的客户端接入节 点的资源标识, 并向目的客户端发送报文; 所述源节点获取至少一个或多 个资源标识, 不同的资源标识用于定位目的客户端的不同接入节点, 一次 路由过程中, 只使用一个资源标识。
中间路由网络, 用于基于所述资源标识将源节点发送的报文路由至目 的客户端;
目的客户端, 用于通过中间路由网络接收源节点发送的报文。
所述中间路由网络进一步包括: 中间对等节点和目的客户端接入节点; 源节点依据所述资源标识向中间路由网络中的中间对等节点和目的客 户端接入节点查询负责处理所述资源标识的目的客户端接入节点地址; 源节点在查询获得负责处理所述资源标识的目的客户端接入节点地址 后, 向负责处理所述资源标识的目的客户端接入节点发送报文;
负责处理所述资源标识的目的客户端接入节点依据目的客户端标识将 源节点发送的报文路由至目的客户端。
该实施例中, 当源节点为 P2P网络中的一个对等节点时, 在其知道到 负责处理所述资源标识的客户端接入节点的路径的情况下, 所述中间路由 网络也可不包含中间对等节点, 即源节点直接向负责处理所述资源标识的 目的客户端接入节点发送报文。
由于该系统实施例基于前述方法实施例, 因此上述系统所包含的功能 模块或功能单元都是为实现前述方法实施例中的步驟流程而设, 其功能都 可直接从前述方法实施例的步驟流程中导出, 任何能从前述方法实施例中 提取或导出的功能模块或执行单元都应当属于本发明系统实施例的保护范 围之内, 为节省篇幅, 此处不再赘述。 本发明实施例还提供一种对等 P2P网络路由节点, 具体为源节点, 包 括: 获取模块, 用于获取用于定位目的客户端接入节点的资源标识, 以通 过 P2P网络, 基于所述资源标识将报文路由至负责处理该资源标识的目的 客户端接入节点。
本发明实施例还提供一种对等 P2P网络路由节点, 具体为中间对等节 点, 包括: 路由模块, 用于依据资源标识选择下一跳对等节点, 经过一跳 或多跳路由, 将报文路由至负责处理该资源标识的目的客户端接入节点。
以上所述, 仅为本发明的较佳实施例而已, 并非用于限定本发明的保 护范围。

Claims

1、 一种对等 P2P网络路由方法, 其特征在于 , 包括:
源节点获取用于定位目的客户端接入节点的资源标识,通过 P2P网络, 基于所述资源标识将报文路由至目的客户端。
2、 根据权利要求 1所述的方法, 其特征在于, 所述基于所述资源标识 将报文路由至目的客户端的方法为:
源节点发送报文给 P2P网络, 通过 P2P网络中的 0个、 1个或多个中 间对等节点将报文路由至负责处理所述资源标识的目的客户端接入节点; 负责处理该资源标识的目的客户端接入节点依据所述目的客户端标识 将报文路由至目的客户端。
3、 根据权利要求 1所述的方法, 其特征在于, 所述基于所述资源标识 将报文路由至目的客户端的方法为:
源节点依据所述资源标识向 P2P网络查询负责处理所述资源标识的目 的客户端接入节点地址;
源节点在查询获得负责处理所述资源标识的目的客户端接入节点地址 后, 依据目的客户端标识向负责处理所述资源标识的目的客户端接入节点 查询目的客户端地址;
源节点依据查询获得的目的客户端地址向目的客户端发送报文。
4、 根据权利要求 1所述的方法, 其特征在于, 所述基于所述资源标识 将报文路由至目的客户端的方法为:
源节点依据所述资源标识向 P2P网络查询负责处理所述资源标识的目 的客户端接入节点地址;
源节点在查询获得负责处理所述资源标识的目的客户端接入节点地址 后, 向其发送艮文;
负责处理所述资源标识的目的客户端接入节点依据目的客户端标识将 源节点发送的报文路由至目的客户端。
5、 根据权利要求 1所述的方法, 其特征在于, 所述源节点为对等节点 或 P2P网络的客户端, 如果源节点是客户端, 则源节点选择自身接入节点 作为下一跳; 如果源节点是对等节点, 则源节点根据所述资源标识按 P2P 算法选择下一跳对等节点。
6、 根据权利要求 1所述的方法, 其特征在于,
所述目的客户端连接多个为其提供报文路由服务的接入节点, 每个接 入节点负责处理一个资源标识, 多个对等节点之间执行负荷分担。
7、 根据权利要求 1所述的方法, 其特征在于,
所述源节点获取至少一个或多个资源标识, 不同的资源标识用于定位 目的客户端的不同接入节点, 一次路由过程中, 只使用一个资源标识。
8、 根据权利要求 2、 3或 4所述的方法, 其特征在于,
当负责处理所述资源标识的目的客户端接入节点失效时, 目的客户端 将所述资源标识的新的负责节点作为新的接入节点。
9、 一种对等 P2P网络路由系统, 其特征在于, 该系统包括:
源节点, 用于获取目的客户端标识及获取用于定位目的客户端接入节 点的资源标识, 并向目的客户端发送报文;
中间路由网络, 用于基于所述资源标识将源节点发送的报文路由至目 的客户端;
目的客户端, 用于通过中间路由网络接收源节点发送的报文。
10、 根据权利要求 9所述的系统, 其特征在于, 所述中间路由网络包 括: 中间对等节点和目的客户端接入节点;
中间对等节点, 用于接收源节点发送的报文, 所述报文中包含目的客 户端标识及所述资源标识; 中间对等节点依据所述资源标识选择下一跳对 等节点, 经过一跳或多跳路由, 将报文路由至负责处理该资源标识的目的 客户端接入节点;
目的客户端接入节点, 用于依据目的客户端标识将报文路由至目的客 户端。
11、 根据权利要求 9所述的系统, 其特征在于, 所述中间路由网络包 括: 中间对等节点和目的客户端接入节点;
源节点依据资源标识向中间路由网络查询负责处理所述资源标识的目 的客户端接入节点地址;
中间对等节点和目的客户端接入节点用于接收和响应源节点发送的查 询负责处理所述资源标识的目的客户端接入节点的请求;
源节点在查询获得负责处理所述资源标识的目的客户端接入节点地址 后, 依据目的客户端标识向负责处理所述资源标识的目的客户端接入节点 查询目的客户端地址;
源节点依据查询获得的目的客户端地址向目的客户端发送报文。
12、 根据权利要求 9所述的系统, 其特征在于, 所述中间路由网络包 括: 中间对等节点和目的客户端接入节点;
源节点依据所述资源标识向中间路由网络中的中间对等节点和目的客 户端接入节点查询负责处理所述资源标识的目的客户端接入节点地址; 源节点在查询获得负责处理所述资源标识的目的客户端接入节点地址 后, 向负责处理所述资源标识的目的客户端接入节点发送报文;
负责处理所述资源标识的目的客户端接入节点依据目的客户端标识将 源节点发送的报文路由至目的客户端。
13、 根据权利要求 9所述的系统, 其特征在于,
所述源节点获取至少一个或多个资源标识, 不同的资源标识用于定位 目的客户端的不同接入节点, 一次路由过程中, 只使用一个资源标识。
14、 根据权利要求 10、 11或 12所述的系统, 其特征在于, 当负责处理所述资源标识的目的客户端接入节点失效时, 目的客户端 将所述资源标识的新的负责节点作为新的接入节点。
15、 一种对等 P2P网络路由节点, 其特征在于, 包括:
获取模块, 用于获取用于定位目的客户端接入节点的资源标识, 以通 过 P2P网络, 基于所述资源标识将报文路由至负责处理该资源标识的目的 客户端接入节点。
16、 一种对等 P2P网络路由节点, 其特征在于, 包括:
路由模块, 用于依据资源标识选择下一跳对等节点, 经过一跳或多跳 路由, 将报文路由至负责处理该资源标识的目的客户端接入节点。
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