Network protocols for distributing functions within a network

• US 7,421,489 B2
• Filed: 12/29/2000
• Issued: 09/02/2008
• Est. Priority Date: 12/29/2000
• Status: Expired due to Fees

• Current Assignee: Avaya Incorporated
• Original Assignee: Nortel Networks Limited (Nortel Networks Corporation)
• Inventors: Botte, James M., Stewart, Daniel B.
• Primary Examiner(s): Jacobs, LaShonda T
• Application Number:
  US09/751,189
• Publication Number:
  US 20020087707A1
• Time in Patent Office: 2,804 Days
• Field of Search: 709/203, 709/217, 709/219, 709/223, 709/224, 709/245, 718/105
• US Class Current: 709/224
• CPC Class Codes: H04L 61/35 involving non-standard use of addresses for implementing network functionalities, e.g. coding subscription information within the address or functional addressing, i.e. assigning an address to a function
• CPC Class Codes: H04L 61/4511 using domain name system [DNS]
• 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 67/1014 based on the content of a request
• CPC Class Codes: H04L 67/1021 based on client or server locations
• CPC Class Codes: H04L 67/1034 Reaction to server failures by a load balancer
• CPC Class Codes: H04L 67/1038 Load balancing arrangements to avoid a single path through a load balancer
• CPC Class Codes: H04L 9/40 Network security protocols

Abstract

A network protocol distributes control and lookup functions among various network elements. Plural servers are permitted to service the same domain name without requiring re-mapping. Each client or server is permitted to have a different network quality of service level that is provided by one or more network elements of a network or server quality of service level that is provided by a server.

Claims

1. A method, associated with a domain name system server, of controlling the transfer of information via a network, said method comprising:

receiving, by the domain name system server from the client device, a request for a network address that is associated with a service, the request including a client identifier and a service authorization handle comprising authorization information for indicating the client is authorized for a level of service for the handling of the request;

selecting, by the domain name system server in response to service type and the service authorization handle, respective network address of one server selected from a plurality of servers that are available to provide the service; and

transmitting, from the domain name system server to said client device, said respective network address so that said client device may transmit at least one service request associated with said server to the selected server associated with the respective network address without the service request being re-mapped by an intermediate device.

2. The method of claim 1 further comprising:

receiving, from at least one further server, an indication that said further server is available to receive requests associated with said service at the authorized level of service; and

incorporating said network address of said further server into said plurality of network addresses.

3. The method of claim 2 wherein said indication includes at least one of:

a network address of said further server, said service and authentication and non-repudiation information.

4. The method of claim 1 further comprising:

transmitting, to a database, a request to determine whether said client device is associated with at least one quality of service level indicated in the service authorization handle;

receiving, from said database, a response to said request; and

selecting said respective one of said plurality of network addresses based on said response.

5. An apparatus, associated with a domain name system server, of controlling the transfer of information via a network, said method comprising:

receive, from the client device, a request for a network address that is associated with a service, the request including service authorization handle for indicating the client is authorized for a level of service for the handling of the request;

select, in response to service type and the service authorization handle, respective network address of one server selected from a plurality of servers that are available to provide the service; and

transmit, to said client device, said respective network address so that said client device may transmit at least one service request associated with said server the selected server associated with the respective network address without the service request being re-mapped by an intermediate device.

6. The apparatus of claim 5 further configured to:

receive, from at least one further server, an indication that said further server is available to receive requests associated with said service at the authorized level of service; and

incorporate said network address of said further server into said plurality of network addresses.

7. The apparatus of claim 6 wherein said indication includes at least one of:

a network address of said further server, said service, and authentication and non-repudiation information.

8. The apparatus of claim 7 further configured to:

transmit, to a database, a request to determine whether said client device is associated with at least one quality of service level indicated in the service authorization handle;

receive, from said database, a response to said request; and

select said respective one of said plurality of network addresses based on said response.

9. An apparatus, associated with a domain name service server, for controlling the transfer of information via a network, said apparatus comprising:

means for receiving, from a client device, a request for a network address that is associated with a service, the request including a service authorization handle for indicating that the client is authorized for a level of service for the handling of the request;

means, responsive to service type and the service authorization level, for selecting a respective network address of one server selected from a plurality of servers that are available to provide said service; and

means for transmitting, to said client device, said respective network address so that said client device may transmit at least one service request to the server associated with the respective network address without the service request being re-mapped by an intermediate device.

10. A computer readable medium, associated with a domain name system server, for storing program code comprised of instructions operable, when executed, to transfer of information via a network, said instructions comprising:

instructions for receiving, from a client device, a request for a network address that is associated with a service, the request including a service authorization handle for indicating that the client is authorized for a level of service for the handling of the request;

instructions for selecting, responsive to service type and the service authorization handle, a respective network address of one server selected from a plurality of servers that are available to provide said service; and

instructions for transmitting, to said client device, said respective network address so that said client device may transmit at least one service request to the selected server without the service request being re-mapped by an intermediate device.