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| Process for analyzing traffic localization within a cellular radiocommunication network |
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| Leaving a message on a held connection |
| FIG. 1 is a system diagram illustrating the operation of applicants' invention in a number of its ... |
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| Communication device for placing calls within a plurality of wireless communication networks |
| OF THE PREFERRED EMBODIMENT In one aspect, the present invention relates to a communication device ... |
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| Character string input system |
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Wireless relay with selective message repeat and method of operation thereof
| Details |
Inventors: Brederveld, Loeke; Hoogendoorn, Jan; Moelard, Hendrik; Monteban, Leo; Mud, Rienk;
Assignee: Lucent Technologies Inc. (Murray Hill, NJ)
Primary Examiner: Patel; Ajit
Assistant Examiner:
Attorney, Agent or Firm:
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. |
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DETAILED DESCRIPTION To address the above-discussed deficiencies of the prior art, the present invention provides, 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.
The present invention therefore recognizes that indiscriminate repeating of unicast messages by radio relays, while simple to implement, represents a considerable and completely avoidable waste of wireless computer network resources.
The present invention responds by basing a decision of whether to repeat on whether the destination end-station has received the unicast message.
If so, the radio relay refrains from wirelessly repeating the message, thereby covering situations in which the destination end-station is in direct range of the source end-station.
If not, the radio relay wirelessly repeats the message so the destination end-station can receive it.
In one embodiment of the present invention, the control circuitry determines whether the destination end-station has received the unicast message by monitoring the transceiver for receipt of an acknowledgment from the destination end-station.
In an embodiment to be illustrated and described, the present invention can operate in a wireless LAN environment, wherein Wireless InterFrame Spaces ("WIFS") separate individual messages.
The WIFS provide a time period within which the radio relay and the destination end-station can acknowledge messages with BLEEP signals: R-BLEEPS and S-BLEEPS for radio relays and stations, respectively
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