Method for selecting an edge server computer

• US 7,426,546 B2
• Filed: 03/16/2002
• Issued: 09/16/2008
• Est. Priority Date: 04/18/2001
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Breiter, Gerd, Schmid, Bernhard, Wagner, Hendrik, Bruegmann, Wilfried
• Primary Examiner(s): Burgess; Glenton B.
• Assistant Examiner(s): Chea; Philip J
• Application Number:
  US10/474,972
• Publication Number:
  US 20040148393A1
• Time in Patent Office: 2,376 Days
• Field of Search: 709/229, 709/203, 709/206, 709/219, 709232-235
• US Class Current: 709/219
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/612 for unicast
• CPC Class Codes: H04L 65/80 Responding to QoS
• CPC Class Codes: H04L 67/01 Protocols
• CPC Class Codes: H04L 67/02 based on web technology, e.g. hypertext transfer protocol [HTTP]
• CPC Class Codes: H04L 67/1001 for accessing one among a plurality of replicated servers
• CPC Class Codes: H04L 67/10015 Access to distributed or replicated servers, e.g. using brokers
• CPC Class Codes: H04L 67/1008 based on parameters of servers, e.g. available memory or workload monitoring of computer activity G06F11/30
• CPC Class Codes: H04L 67/101 based on network conditions
• CPC Class Codes: H04L 67/1012 based on compliance of requirements or conditions with available server resources
• CPC Class Codes: H04L 67/1014 based on the content of a request
• CPC Class Codes: H04L 67/1021 based on client or server locations
• CPC Class Codes: H04L 67/1095 Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes
• CPC Class Codes: H04L 67/51 Discovery or management thereof, e.g. service location protocol [SLP] or web services
• CPC Class Codes: H04L 9/40 Network security protocols

Abstract

Media Distribution within the Internet is done with the help of Application-Servers, Content-Servers and distributed Edge Servers where the clients are connected to Media Distribution Services. A computer system is provided comprising a client having a Web browser with a media player, a Web Application Server, content Edge Servers ES1 to ES4 and a Media Request Broker. After the client has selected a media for streaming, the Media Request Broker makes a determination concerning an appropriate Edge Server to perform the streaming operation. This determination is made based on an extension of the client'"'"'s http request made by the Edge Server and passed from the Application Server to the Media Request Broker.

Claims

1. A method for selecting a first server computer for sending of data to a client computer, the method comprising the steps of:

accessing a second server computer through a path in a computer network, the path comprising a first set of one or more server computers;

adding information indicative of at least one server computer of the first set of one or more server computers to a locator of a resource on the second server computer, the resource having a unique signature as part of its identifier;

selecting the first server computer based on the information added to the locator;

wherein the second server computer being a Web application server comprising a Web page with a hyperlink referencing the data to be sent to the client computer, the hyperlink including a unique signature, the method further comprising the steps of selecting the hyperlink by the client computer, and subsequently generating an http request out of this hyperlink by a web browser, this http request containing the unique signature identifying a media request;

at least temporarily storing the information added to the locator on the second server computer;

providing of the information to a media request broker in response to a selection of the hyperlink by the client computer;

providing the media request broker with the information, the information being indicative of the server computer of the first set of one or more server computers being a first node in the path;

determining a quality weight based on the information for the first server computer node in the path and for server computers of a second set of server computers belonging to that server computer node;

selecting one of the server computers from a group comprising the first server computer node in the path and the second set of server computers with a quality weight being greater than a predefined threshold value; and

determining a quality weight of a second server computer node in the path in case none of the quality weights of the first group is sufficient.

2. The method of claim 1, the quality weights being determined based on one or more following criteria:

availability of the data on a server computer, number of transactions in process on the server computer, percentage of processing resources in use on the server computer, communication bandwidth available in a communication link with the client.