Routing

• US 6,959,185 B1
• Filed: 02/10/2000
• Issued: 10/25/2005
• Est. Priority Date: 02/12/1999
• Status: Expired due to Fees

• Current Assignee: Nokia Corporation
• Original Assignee: Nokia Corporation
• Inventors: Stage, Erling Bugge
• Primary Examiner(s): Tieu, Benny Q.
• Application Number:
  US09/913,273
• Time in Patent Office: 2,084 Days
• Field of Search: 455/414.1, 455/466, 701/1, 709/246, 719/313
• US Class Current: 455/414.1
• CPC Class Codes: G06F 9/544 Buffers; Shared memory; Pipes
• CPC Class Codes: H04L 67/04 specially adapted for terminals or networks with limited capabilities; specially adapted for terminal portability
• CPC Class Codes: H04L 67/1001 for accessing one among a plurality of replicated servers
• CPC Class Codes: H04L 67/1036 Load balancing of requests to servers for services different from user content provisioning, e.g. load balancing across domain name servers
• CPC Class Codes: H04L 67/56 Provisioning of proxy services store-and-forward switching systems in data switching networks H04L12/54
• CPC Class Codes: H04L 67/564 Enhancement of application control based on intercepted application data
• CPC Class Codes: H04L 67/565 Conversion or adaptation of application format or content adding application control or application functional data H04L67/561
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]
• CPC Class Codes: H04M 1/72412 using two-way short-range wireless interfaces
• CPC Class Codes: H04M 2250/02 including a Bluetooth interface

Abstract

A director for routing a message from a client to a chosen one of a plurality of servers to access a resource and for routing the response of the resource from the chosen server to the client. Each message has an indication of its origin, an indication of its destination and a message body. The message body comprises first input means for receiving a first input message from the client, first output means for providing a first output message to the chosen server, second input means for receiving a second input message from the chosen server in response to the first output message, an indication identifying the client; and second output means for providing a second output message to the one client in response to the second input message, indicating its source as the routing means, and its destination as the one client.

Claims

1. A director for routing a message from a client to a chosen one of a plurality of servers to access a resource and for routing a response of the resource from the chosen server to the client wherein each message has an indication of its origin, an indication of its destination and a message body, comprising:

first input means for receiving a first input message from the client, indicating its source as the client and its destination as the routing means;

first output means for providing a first output message to the chosen server, indicating its source as the client and its destination as the chosen server;

second input means for receiving a second input message from the chosen server in response to the first output message, indicating its source as the chosen server and its destination as the routing means and having an additional indication identifying the client; and

second output means for providing a second output message to the client in response to the second input message, indicating its source as the routing means and its destination as the client; and

wherein

said director is arranged to route input messages as output messages, creating the first output message by adapting the indication of destination of the first input message and, creating the second output message, by adapting the indication of destination and the indication of source of the second input message and by removing the additional indication from the second input message.

2. A director as claimed in claim 1, further comprising arbitration means having a third input means for receiving inputs and being responsive thereto to determine the chosen server from the plurality of servers.

3. A director as claimed in claim 1, arranged to adapt the second input message having a predetermined format, different to that of the first input messages.

4. A director as claimed in claim 1, wherein the format of the second input message differs from that of the first input message in that the second input message has the additional indication at its end.

5. A director as claimed in claim 1, wherein said client, chosen server and director are respectively first, second and third objects, each being a specialization of a same base class.

6. A director as claimed in claim 5 wherein the sending of a message from an originating object to a destination object involves the calling of a function in the destination object.

7. A director as claimed in claim 6 wherein the function has a pointer to or an address of the originating object and a pointer to or an address of the destination object as arguments thereof.

8. A radio handset comprising:

a director as claimed in claim 1;

processor means including memory, for performing the functions of the handset by communicating between clients and servers.

9. A radio handset as claimed in claim 8 wherein each of said plurality of servers accesses means for making and/or receiving a call according to a different radio communications standard.

10. A radio handset as claimed in claim 8 wherein the clients are defined within the processor means.

11. A radio handset as claimed in claim 10 wherein the director is defined in the processor means of the handset.

12. A radio handset as claimed in claim 11 wherein the chosen server is defined in the processor means of the handset.

13. A radio handset as claimed in claim 8 wherein the clients are arranged to request a service using a symbolic address identifying the service and to receive in response thereto identifying the director which controls access to duplicate servers providing the service.