Centrally enhanced peer-to-peer resource sharing method and apparatus

• US 7,130,921 B2
• Filed: 03/15/2002
• Issued: 10/31/2006
• Est. Priority Date: 03/15/2002
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Goodman, Brian D., Subramanian, Ramesh, Sweeney, William C., Rooney, John W.
• Primary Examiner(s): Vaughn, William
• Assistant Examiner(s): Gerezgiher, Yemane Mesfin
• Application Number:
  US10/099,366
• Publication Number:
  US 20030177246A1
• Time in Patent Office: 1,691 Days
• Field of Search: 709/203, 709/216, 709/219, 709228-232, 709/238, 709/244, 709/245, 707/3, 707/10, 707/104.1
• US Class Current: 709/244
• CPC Class Codes: H04L 67/104 Peer-to-peer [P2P] networks

Abstract

A peer-to-peer network has a server that maintains a list of addresses of clients connected to the peer-to-peer network. The server generates seed lists for each of the clients connected to the network from the server maintained list. The clients conduct peer-to-peer searches using the seed list provided by the server. The seed lists may be either randomly generated or generated to facilitate network objectives. The clients may periodically request seed list refreshing. The peer-to-peer network may further include authentication and authorization search security checks.

Claims

1. A method of operating a peer-to-peer network having a multiplicity of clients, each of the multiplicity of clients having a unique client address and able to connect to or disconnect from the peer-to-peer network at any time, and a server having a list of client addresses, said method comprising the steps of:

determining, at the server, which of the multiplicity of clients is connected to the peer-to-peer network;

generating, at the server, a list of connected client addresses in response to the step of determining;

communicating from the server to a first of the multiplicity of clients a first unique seed list comprising a first portion of the list of connected client addresses;

communicating from the server to a second of the multiplicity of clients a second unique seed list comprising a second portion of the list of connected client addresses, the first unique seed list including a second client address corresponding to the second client and the second unique seed list including a third client address corresponding to a third of the multiplicity of clients;

communicating a search request from the first client to at least the second client by utilizing the first unique seed list;

communicating the search request from the second client to at least the third client by utilizing the second unique seed list;

communicating from the third client to an external authentication process an identification signal;

at the external authentication process authenticating the identification signal by determining if the identification signal was originated by the first client; and

communicating from the external authentication process to the third client an authentication signal in response to an affirmative authentication by said step of authenticating.

2. The method according to claim 1 further comprising the steps of:

communicating a connection signal from one of the multiplicity of clients to the server in response to the one of the multiplicity of clients connecting to the peer-to-peer network; and

at the server, adding a newly connected client address corresponding to the one of the multiplicity of clients to the list of connected client addresses in response thereto.

3. The method according to claim 2 further comprising the steps of

at the server, removing a disconnected client address from the list of connected client addresses in response to an absence of reception of an expected acknowledgement signal from a corresponding disconnected client.

4. The method according to claim 3 further comprising the steps of:

communicating a ping signal from the server to the one of the multiplicity of clients in response to its inclusion in the list of connected client addresses; and

communicating the expected acknowledgement signal from the one of the multiplicity of clients in response to reception the ping signal wherein the ping signal is not received and the expected acknowledgement signal is not sent by the one of the multiplicity of clients if the one of the multiplicity of clients is disconnected from the peer-to-peer network thereby causing the one of the multiplicity of clients to correspond to the disconnected client address.

5. The method according to claim 1 wherein the first seed list includes a disconnected client and the method further comprises the step of:

at the first client, removing the client address corresponding to the disconnected client from the first seed list in response to an absence of reception of an expected acknowledgement signal from the disconnected client.

6. The method according to claim 5 further comprising the step of

communicating from the first client to the server a request for a refreshed seed list in response to said step of removing the client address corresponding to the disconnected client from the first seed list.

7. The method according to claim 1 wherein the first seed list includes a plurality of disconnected clients and the method further comprises the step of

communicating from the first client to the server a request for a refreshed seed list in response to an absence of reception of expected acknowledgement signals from the plurality of disconnected clients.

8. The method according to claim 1 wherein the second client has a second resource memory having a plurality of resources stored therein, the method further comprising the steps of:

at the second client, searching the resources within the second resource memory in response to the search request; and

communicating from the second client to the first client a second match signal indicative of a matching resource in response thereto.

9. The method according to claim 8 wherein at least one of the plurality of resources within the second resource memory includes metadata indicative thereof and said step of searching resources includes the step of searching the metadata of the resource.

10. The method according to claim 9 wherein the metadata file is manually generated.

11. The method according to claim 8 wherein the third client has a third resource memory having a plurality of resources stored therein, the method further comprising the steps of:

at the third client, searching the resources within the third resource memory in response to the search request; and

communicating from the third client to the first client a third match signal in response thereto.

12. The method according to claim 1 wherein the third client has a third resource memory having a plurality of resources stored therein, the method further comprising the steps of:

at the third client, searching the resources within the third resource memory in response to the search request; and

communicating from the third client to the first client a third match signal indicative of a matching resource in response thereto.

13. The method according to claim 12 wherein the search request is initiated by the first client and includes the identification signal indicative of the first client;

and

said step of searching resources selectively searches the plurality of resources within the third resource memory in response to the identification signal.

14. The method according to claim 13 wherein:

said step of searching resources selectively searches the plurality of resources within the third resource memory in response to the authentication signal.

15. The method according to claim 12 further wherein each of the plurality of resources within the third resource memory has a resource access control signal associated therewith and the search request is initiated by the first client and includes an identification signal indicative the first client and the method comprises the steps of:

communicating from the third client to and an external authorization process the identification signal;

at the external authorization process, determining a first client access control signal in response to the identification signal; and

communicating from the external authentication process to the third client the first client access control signal, and

said step of searching resources selectively searches the plurality of resources within the third resource memory in response to the authentication signal, wherein

said step of searching resources selectively searches the plurality of resources within the third resource memory in response to a match between the first client access control signal and each corresponding resource access control signal.

16. A client in a peer-to-peer network, the network having a server and a multiplicity of clients having searchable resources, each of the multiplicity of clients having a unique client address, the client comprising:

a seed list receiver that receives and stores a seed list of client addresses from the server; and

a peer-to-peer network search dispatcher that forwards a resource search request to client addresses of the seed list,

wherein the resource search request includes a credentials signal indicative of an initiating client initiating the resource search request and said peer-to-peer network search dispatcher further communicates the credential signal to an authorization process external to the client and receives at least one of a plurality of predetermined authorization signals in response thereto, and said client further comprises;

a memory able to store a plurality of resources, each of the plurality of resources having at least one corresponding access attribute; and

a search engine that selectively searches at least one of the plurality of resources in response to a comparison of the credentials signal and the at least one access attribute of each of the plurality of resources.

17. The client according to claim 16 wherein the client further comprises:

a memory that stores a plurality of resources, each of the plurality of resources having at least one corresponding access attribute; and

a search engine that selectively searches the plurality of resources in response to a comparison of the at least one of the plurality of predetermined authorization signals received from the external authorization process and the at least one access attribute of each of the plurality of resources.

18. A method in a client in a peer-to-peer network, the network having a server and a multiplicity of clients having searchable resources, each of the multiplicity of clients having a unique client address, the method comprising the steps of:

receiving a seed list of client addresses from the server; and

forwarding a resource search request to client addresses of the seed list,

wherein the resource search request includes a credentials signal indicative of an initiating client initiating the resource search request, and the method further comprises the step of;

selectively searching at least one of a plurality of resources stored at the client, wherein each of the plurality of resources having at least one corresponding access attribute and said step of selectively searching searches in response to a comparison of the credentials signal and the at least one access attribute of each of the plurality of resources,

wherein the resource search request includes a credentials signal unique to an initiating client initiating the resource search request, the method further comprising the steps of;

communicating the credential signal to an authorization process external to the client; and

receiving at least one of a plurality of predetermined authorization signals in response thereto.

19. The method according to claim 18 further comprising the step of:

selectively searching at least one of a plurality of resource stored at the client, wherein each of the plurality of resources has at least one corresponding access attribute and said step of selectively searching searches in response to a comparison of the received authorization signal and the at least one access attribute of each of the plurality of resources.