Wireless relay with selective message repeat and method of operation thereof

• US 5,898,679 A
• Filed: 12/30/1996
• Issued: 04/27/1999
• Est. Priority Date: 12/30/1996
• Status: Expired due to Term

• Current Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Hoogendoorn, Jan, Moelard, Hendrik, Monteban, Leo, Mud, Rienk, Brederveld, Loeke
• Primary Examiner(s): Patel, Ajit
• Application Number:
  US08/775,238
• Time in Patent Office: 848 Days
• Field of Search: 370/315, 370/316, 370/328, 370/338, 370/401, 370/400, 455/11.1, 455/524, 371/32, 371/33
• US Class Current: 370/315
• CPC Class Codes: H04L 1/1809 Selective-repeat protocols
• CPC Class Codes: H04L 2001/0092 Error control systems characterised by the topology of the transmission link
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 88/04 adapted for relaying to or from another terminal or user

Abstract

For use in a wireless computer network having a radio relay capable of transmitting messages, a system and method, operable with the radio relay, for selectively repeating a unicast message received from a source end-station only upon some indication that a destination end-station has not received the message. The system includes: (1) a transceiver that receives the unicast message from the source end-station and (2) control circuitry, coupled to the transceiver, that determines whether the destination end-station has received the unicast message and causes the transceiver to refrain from repeating the unicast message if the destination end-station has received the unicast message, the radio relay thereby freed from repeating already-received unicast messages.

Claims

1. For use in a wireless computer network having a radio relay capable of transmitting messages, a system, operable with said radio relay, for selectively repeating a unicast message received from a source end-station only upon some indication that a destination end-station has not received said message, said system comprising:

a transceiver that receives said unicast message from said source end-station; and

control circuitry, coupled to said transceiver, that determines whether said destination end-station has received said unicast message by monitoring said transceiver for receipt of an acknowledgment from said destination end-station, said destination end-station refraining from acknowledging said unicast message based on errors contained therein, and causes said transceiver to refrain from repeating said unicast message if said destination end-station has received said unicast message, said radio relay thereby freed from repeating already-received unicast messages.

2. The system as recited in claim 1 wherein said destination end-station refrains from acknowledging said unicast message if said destination end-station fails to confirm that said unicast message is error-free.

3. The system as recited in claim 1 wherein said control circuitry is capable of causing said transceiver to acknowledge said unicast message, said control circuitry causing said transceiver to refrain from acknowledging said unicast message if said control circuitry fails to confirm that said unicast message is error-free.

4. The system as recited in claim 1 wherein said control circuitry causes said transceiver to repeat a multicast message received from said source end-station without regard as to whether said destination end-station has received said multicast message.

5. The system as recited in claim 1 wherein said control circuitry is coupled to a wire-based local area network (LAN) via a bridge, said control circuitry transmitting said unicast message to said LAN via said bridge without regard as to whether said destination end-station has received said unicast message.

6. The system as recited in claim 1 wherein said control circuitry is coupled to a wire-based local area network (LAN) via a bridge, said LAN receiving said unicast message from said control circuitry via said bridge without regard as to whether said destination end-station has received said unicast message, said LAN further searching a bridge filter table associated therewith for a destination address corresponding to said destination end-station.

7. For use in a wireless computer network having a radio relay capable of transmitting messages, a method, operable with said radio relay, of selectively repeating a unicast message received from a source end-station only upon some indication that a destination end-station has not received said message, said method comprising the steps of:

receiving said unicast message from said source end-station;

determining whether said destination end-station has received said unicast message by monitoring for receipt of an acknowledgment from said destination end-station, said destination end-station refraining from acknowledging said unicast message based on errors contained therein; and

refraining from repeating said unicast message if said destination end-station has received said unicast message, said radio relay thereby freed from repeating already-received unicast messages.

8. The method as recited in claim 7 further comprising the step of refraining from acknowledging said unicast message if said destination end-station fails to confirm that said unicast message is error-free.

9. The method as recited in claim 7 further comprising the step of refraining from acknowledging said unicast message if said radio relay fails to confirm that said unicast message is error-free.

10. The method as recited in claim 7 further comprising the step of repeating a multicast message received from said source end-station without regard as to whether said destination end-station has received said multicast message.

11. The method as recited in claim 7 wherein said radio relay is coupled to a wire-based local area network (LAN) via a bridge, said method further comprising the step of transmitting said unicast message to said LAN via said bridge without regard as to whether said destination end-station has received said unicast message.

12. The method as recited in claim 7 wherein said radio relay is coupled to a wire-based local area network (LAN) via a bridge, said method comprising the steps of:

receiving said unicast message from said radio relay into said LAN via said bridge without regard as to whether said destination end-station has received said unicast message; and

searching a bridge filter table associated therewith for a destination address corresponding to said destination end-station.

13. A wireless computer network, comprising:

a wire-based local area network (LAN) having a server and a backbone;

a plurality of bridges coupled to said backbone; and

a corresponding plurality of radio relays coupled to said plurality of bridges and capable of transmitting unicast and multicast messages among a plurality of source and destination end-stations, each of said corresponding plurality of radio relays including a system for selectively repeating a unicast message received from a source end-station only upon some indication that a destination end-station has not received said unicast message, said system including;

a transceiver that receives said unicast message from said source end-station; and

control circuitry, coupled to said transceiver, that determines whether said destination end-station has received said unicast message by monitoring said transceiver for receipt of an acknowledgment from said destination end-station, said destination end-station refraining from acknowledging said unicast message based on errors contained therein, and causes said transceiver to refrain from repeating said unicast message if said destination end-station has received said unicast message, said radio relay thereby freed from repeating already-received unicast messages.

14. The network as recited in claim 13 wherein said destination end-station refrains from acknowledging said unicast message if said destination end-station fails to confirm that said unicast message is error-free.

15. The network as recited in claim 13 wherein said control circuitry is capable of causing said transceiver to acknowledge said unicast message, said control circuitry causing said transceiver to refrain from acknowledging said unicast message if said control circuitry fails to confirm that said unicast message is error-free.

16. The network as recited in claim 13 wherein said control circuitry causes said transceiver to repeat a multicast message received from said source end-station without regard as to whether said destination end-station has received said multicast message.

17. The network as recited in claim 13 wherein said control circuitry transmits said unicast message to said LAN via a corresponding one of said plurality of bridges without regard as to whether said destination end-station has received said unicast message.

18. The network as recited in claim 13 wherein said LAN receives said unicast message from said control circuitry via a corresponding one of said plurality of bridges without regard as to whether said destination end-station has received said unicast message, said LAN searching a bridge filter table associated therewith for a destination address corresponding to said destination end-station.