Systems and methods for optimizing communications in an ethernet network

• US 6,747,985 B1
• Filed: 08/03/1998
• Issued: 06/08/2004
• Est. Priority Date: 08/03/1998
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lovette, Steven E.
• Primary Examiner(s): Jung, Min
• Assistant Examiner(s): LEE, CHI HO A
• Application Number:
  US09/128,347
• Time in Patent Office: 2,136 Days
• Field of Search: 370/445, 370/230, 370/235, 370/424, 370/452, 370/458, 370/460, 370/468, 709/203, 709/223, 709/224, 709/225, 709/226, 709/251
• US Class Current: 370/460
• CPC Class Codes: H04L 12/43 with synchronous transmission, e.g. time division multiplex [TDM], slotted rings

Abstract

There is disclosed, for use in communication network, a network communications manager capable of controlling data transfers among a server and a plurality of client nodes coupled by a network ring. The network communications manager comprises a time quanta controller capable of dividing a time frame on the network ring into distinct time quanta and assigning to each of the plurality of client nodes a predetermined time quantum during which the each of the plurality of client nodes may transmit data.

Claims

1. For use in a communication network comprising a server and a plurality of client nodes coupled by a network ring, a network communications manager capable of controlling data transfers among said server and said plurality of client nodes, said network communications manager comprising:

a time quanta controller capable of dividing a time frame on said network ring into distinct time quanta and assigning to each of said plurality of client nodes a predetermined transmit-only time quantum during which only said each of said plurality of client nodes may only transmit data and wherein said predetermined transmit-only time quantum has a minimum duration to thereby ensure that said each of said plurality of client nodes is able to communicate for a minimum-length time quantum during each time frame, wherein each of said client nodes is allocated with the minimum-length time quantum and a maximum-length time quantum.

2. The network communications manager set forth in claim 1 wherein said time quanta controller assigns to said server a predetermined transmit-only time quantum during which said server may transmit data.

3. The network communications manager set forth in claim 1 wherein said time quanta controller is capable of assigning to each of said plurality of client nodes an additional transmit-only time quantum during which said each of said plurality of client nodes may transmit data.

4. The network communications manager set forth in claim 3 wherein said predetermined transmit-only time quantum and said additional transmit-only time quantum occur sequentially.

5. The network communications manager set forth in claim 1 wherein said time quanta controller is capable of assigning to said server an additional transmit-only time quantum during which said server may transmit data.

6. The network communications manager set forth in claim 5 wherein said predetermined transmit-only time quantum and said additional transmit-only time quantum occur sequentially.

7. The network communications manager set forth in claim 1 wherein said network communications manager transmits a synchronization signal on said network ring capable of synchronizing data transmission by said server and said plurality of client nodes.

19. The network communications manager set forth in claim 1, wherein:

the time quanta controller is operable to pre-allocate the minimum-length time quantum and the maximum-length time quantum to each of the client nodes; and

the time quanta controller is further operable to dynamically allocate at least a portion of the assigned quantum from at least one of the client nodes to at least one other of the client nodes.

8. A communication network comprising:

a server;

a plurality of client nodes coupled to said server by a network ring;

a network communications manager capable of controlling data transfers among said server and said plurality of client nodes, said network communications manager comprising;

a time quanta controller capable of dividing a time frame on said network ring into distinct time quanta and assigning to each of said plurality of client nodes a predetermined transmit-only time quantum during which only said each of said plurality of client nodes may only transmit data and wherein said predetermined transmit-only time quantum has a minimum duration to thereby ensure that said each of said plurality of client nodes is able to communicate for a minimum-length time quantum during each time frame, wherein each of said client nodes is allocated with the minimum-length time quantum and a maximum-length time quantum.

9. The communication network set forth in claim 8 wherein said time quanta controller assigns to said server a predetermined transmit-only time quantum during which said server may transmit data.

10. The communication network set forth in claim 8 wherein said time quanta controller is capable of assigning to each of said plurality of client nodes an additional transmit-only time quantum during which said each of said plurality of client nodes may transmit data.

11. The communication network set forth in claim 10 wherein said predetermined transmit-only time quantum and said additional transmit-only time quantum occur sequentially.

12. The communication network set forth in claim 8 wherein said time quanta controller is capable of assigning to said server an additional transmit-only time quantum during which said server may transmit data.

13. The communication network set forth in claim 12 wherein said predetermined transmit-only time quantum and said additional transmit-only time quantum occur sequentially.

14. The communication network set forth in claim 8 wherein said network communications manager transmits a synchronization signal on said network ring capable of synchronizing data transmission by said server and said plurality of client nodes.

20. The communication network set forth in claim 8 wherein:

the time quanta controller is operable to pre-allocate the minimum-length time quantum and the maximum-length time quantum to each of the client nodes; and

the time quanta controller is further operable to dynamically allocate at least a portion of the assigned quantum from at least one of the client nodes to at least one other of the client nodes.

15. For use in a communication network comprising a server and a plurality of client nodes coupled by a network ring, a method of controlling data transfers among the server and the plurality of client nodes, the method comprising the steps of:

dividing a data transmission time frame on the network ring into a plurality of time quanta;

allocating to each of the plurality of client nodes a predetermined transmit-only time quanta during which only said each of the plurality of client nodes may only transmit data and wherein said predetermined transmit-only time quantum has a minimum duration to thereby ensure that said each of said plurality of client nodes is able to communicate for a minimum-length time quantum during each time frame, wherein each of said client nodes is allocated with the minimum-length time quantum and a maximum-length time quantum.

16. The method set forth in claim 15 including the further step of allocating to the server a pre-determined transmit-only time quanta during which the server may transmit data.

17. The method set forth in claim 15 including the further step of monitoring data traffic on the network ring to determine data traffic loads on the plurality of client nodes.

18. The method set forth in claim 15 including the further steps of receiving from at least one client node an allocation request and, in response thereto, allocating to the at least one client node an additional transmit-only time quanta during which the at least one client node may only transmit data.