PEER-TO-PEER NETWORK SYSTEM, PROXY SERVICE PEER, AND METHOD FOR PEER INTERWORKING BETWEEN OVERLAY NETWORKS

• US 20100064008A1
• Filed: 09/11/2009
• Published: 03/11/2010
• Est. Priority Date: 03/13/2007
• Status: Active Grant

• Current Assignee: Xfusion Digital Technologies Company Limited
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Wei, Jiahao, Yan, Zhefeng
• Granted Patent: US 8,458,254 B2
• Time in Patent Office: Days
• US Class Current: 709/204
• CPC Class Codes: H04L 45/64 using an overlay routing layer
• CPC Class Codes: H04L 47/125 by balancing the load, e.g. traffic engineering
• CPC Class Codes: H04L 67/104 Peer-to-peer [P2P] networks
• CPC Class Codes: H04L 67/1063 Discovery through centralising entities
• CPC Class Codes: H04L 67/1065 Discovery involving distributed pre-established resource-based relationships among peers, e.g. based on distributed hash tables [DHT] pre-configuration of logical or physical connections H04L67/1053
• CPC Class Codes: H04L 67/1072 Discovery involving ranked list compilation of candidate peers
• CPC Class Codes: H04L 67/1089 Hierarchical topologies
• CPC Class Codes: H04L 67/1091 Interfacing with client-server systems or between P2P systems
• CPC Class Codes: H04L 67/1093 Some peer nodes performing special functions

Abstract

The present invention relates to a P2P network system. The P2P network system includes: multiple local overlay networks, each comprising multiple proxy service peers; a global overlay network composed of the proxy service peers of all local overlay networks. The proxy service peer is adapted to respond to the request of the requesting peer, query the local overlay network or global overlay network, and return the address information of the requested peer or the requested proxy service peer to the requesting peer. The present invention also relates to a proxy service peer applicable to the foregoing network system, and a method of peer interworking between P2P overlay networks based on the foregoing system. The present invention relieves the load of the proxy service peer, avoids blindness of the requesting peer in selecting the proxy service peer, and achieves load balance between proxy service peers.

Claims

1. A Peer-to-Peer (P2P) network system, comprising multiple local overlay networks and a global overlay network composed of proxy service peers of all the local overlay networks, wherein:

at least a local overlay network comprises more than one proxy service peer;

the proxy service peer is adapted to receive a query request of a requesting peer, query the global overlay network for a proxy service peer list of the local overlay network where the requested peer resides, and return address information of a selected requested proxy service peer to the requesting peer.

2. The P2P network system of claim 1, wherein the proxy service peer is further adapted to count current transactions, calculate load information, and release the load information to global overlay network or the local overlay network and where the proxy service peer resides.

3. The P2P network system of claim 2, wherein the peer in the local overlay network is adapted to obtain a proxy service peer list in a local overlay network, and select a proxy service peer with a lightest load in the proxy service peer list for providing proxy services according to the load information.

4. A proxy service peer, comprising a request responding module, a proxy selecting module, and an information sending module, wherein:

the request responding module is adapted to receive a query request from a requesting peer, and send the query request to the proxy selecting module;

the proxy selecting module is adapted to determine address information of a requested peer according to the query request, or select a requested proxy service peer; and

the information sending module is adapted to return address information of the requested peer or the selected requested proxy service peer to the requesting peer.

5. The proxy service peer of claim 4, further comprising:

a load information calculating module, adapted to count current transactions and calculate load information; and

a load information releasing module, adapted to release the load information to a local overlay network where the proxy service peer resides and a global overlay network.

6. The proxy service peer of claim 5, further comprising:

a service selecting module, adapted to select a proxy service peer with a lightest load for providing proxy services according to the load information in the P2P network system.

7. A method of peer interworking between Peer-to-Peer (P2P) overlay networks, comprising:

obtaining, by a requesting peer, a proxy service peer list in a local overlay network, and selecting a proxy service peer in the proxy service peer list as the requesting proxy service peer;

sending, by the requesting peer, a query request to the requesting proxy service peer, and receiving a query response containing a requested proxy service peer which is selected by the requesting proxy service peer;

sending, by the requesting peer, a call request message to the requested proxy service peer; and

receiving address information of a requested peer returned by the requested proxy service peer; and

setting up, by the requesting peer, communication with the requested peer according to the address information of the requested peer.

8. The method of claim 7, wherein before the obtaining the proxy service peer list in the local overlay network, the method further comprises:

judging, by the requesting peer, whether the requested peer is in the same local overlay network according to a requested peer identifier;

if the requested peer is in the same local overlay network, sending a session request to the requested peer directly.

9. The method of claim 7, wherein the process of the requesting peer obtaining the proxy service peer list in the local overlay network comprises:

sending, by the requesting peer, a Distributed Hash Table (DHT) query request by using a Hash value of a public identifier name of the proxy service peer in the local overlay network as a query parameter; and

obtaining, by the requesting peer, the proxy service peer list in the local overlay network according to a received response.

10. The method of claim 7, wherein the requesting peer selects the proxy service peer with a lightest load in the proxy service peer list as the requesting proxy service peer.

11. The method of claim 7, wherein after the requesting peer sends the query request to the requesting proxy service peer, the method further comprises:

receiving, by the requesting proxy service peer, the query request from the requesting peer;

searching, by the requesting proxy service peer, for a proxy service peer list in the local overlay network where the requested peer resides according to the query request, and selecting a proxy service peer with a lightest load in the proxy service peer list as the requested proxy service peer; and

returning, by the requesting proxy service peer, address information of the requested proxy service peer to the requesting peer.

12. The method of claim 7, wherein after the requesting peer sends the call request message to the requested proxy service peer, the method further comprises:

receiving, by the requested proxy service peer, the call request message from the requesting peer;

starting, by the requested proxy service peer, Distributed Hash Table (DHT) query in the local overlay network where the requested proxy service peer resides, and returning the found address information of the requested peer to the requesting peer.

13. The method of claim 10, further comprising:

counting, by the proxy service peer, current transactions, and calculating load information; and

releasing, by the proxy service peer, the load information to the overlay network where the proxy service peer resides.

14. The method of claim 13, wherein the proxy service peer releases its load information at the same time of registration and update.

15. The method of claim 14, wherein the process of the proxy service peer releasing its load information at the same time of registration and update comprises:

locating, by the proxy service peer, a peer that stores a proxy registration list through a P2P routing algorithm, and sending a REGISTER request and the load information to the peer that stores the proxy registration list;

judging, by the peer that stores the proxy registration list, whether the peer is responsible for storing information corresponding to a Hash key of the proxy service peer;

if yes, storing the Hash key of the proxy service peer and the load information;

otherwise, searching a routing table for information about the peer responsible for storing, and sending the information to the proxy service peer;

sending, by the proxy service peer, the REGISTER request and the load information to the peer responsible for storing according to the information about the peer responsible for storing; and

accepting, by the peer responsible for storing, the REGISTER request, and storing the Hash key of the proxy service peer and the load information.

16. The method of claim 15, wherein the Hash key of the proxy service peer is calculated in this way:

using a public identifier name of the proxy service peer in the local overlay network where the proxy service peer resides as an identifier name of the proxy service peer; and

performing Hash calculation for the identifier name of the proxy service peer, and using results of the calculation as the Hash key of the proxy service peer.