Wireless local area network transmission system
First Claim
1. In a wireless local area network, hereinafter referred to as LAN, including a plurality of stations operating on a single wireless communication channel, hereinafter referred to as WCC, a method of controlling the operation of said wireless LAN comprising the steps of:
- (a) transmitting in a first time interval over said single WCC an initial message portion of a message to be transmitted by a first (transmitting) station of said plurality of stations to a second (destination) station of said plurality of stations, said initial message portion containing a destination address of said second station and a sending address of said first station;
(b) said second station, in response to receiving said initial message portion, transmitting in a second time interval following said first time interval a response message over said single WCC, said response message containing said destination address of said second station and said sending address of said first station;
(c) said first station transmitting over said single WCC a jam pattern in a third time interval following said second time interval if said response message is not received by said first station; and
(d) said first station remaining in a receive mode during said third time interval if said response message is identical to said initial message portion, enabling said first station to detect a jam pattern transmitted by other stations in said plurality of stations during said third time interval.
4 Assignments
0 Petitions
Accused Products
Abstract
In a method of operating a wireless local area network (10), a transmitting station (12) senses that the medium is free and then transmits a first portion (43) of a message (40), including destination and source addresses. Message transmission is then interrupted for a response window period (53) during which a destination station (12) should transmit a response message 42 also containing said source and destination addresses. If the transmitting station (12) does not receive a correct response message (42) then it transmits a JAM signal during a JAM window (65) following the response window (53), thereby indicating to all stations (12) that a collision has occurred. All stations not transmitting a JAM signal monitor the JAM window (65) and are thus informed whether or not a collision has been detected.
57 Citations
8 Claims
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1. In a wireless local area network, hereinafter referred to as LAN, including a plurality of stations operating on a single wireless communication channel, hereinafter referred to as WCC, a method of controlling the operation of said wireless LAN comprising the steps of:
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(a) transmitting in a first time interval over said single WCC an initial message portion of a message to be transmitted by a first (transmitting) station of said plurality of stations to a second (destination) station of said plurality of stations, said initial message portion containing a destination address of said second station and a sending address of said first station; (b) said second station, in response to receiving said initial message portion, transmitting in a second time interval following said first time interval a response message over said single WCC, said response message containing said destination address of said second station and said sending address of said first station; (c) said first station transmitting over said single WCC a jam pattern in a third time interval following said second time interval if said response message is not received by said first station; and (d) said first station remaining in a receive mode during said third time interval if said response message is identical to said initial message portion, enabling said first station to detect a jam pattern transmitted by other stations in said plurality of stations during said third time interval. - View Dependent Claims (2, 3, 4)
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5. In a wireless local area network, hereinafter referred to as LAN, including a plurality of stations operating on a single wireless communication channel, hereinafter referred to as WCC, a method of controlling the operation of said wireless LAN comprising the steps of:
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(a) transmitting in a first time interval over said single WCC an initial message portion of a message to be transmitted by a first (transmitting) station of said plurality of stations to a second (destination) station of said plurality of stations, said initial message portion containing a destination address of said second station and a sending address of said first station; (b) said second station, in response to receiving said initial message portion, transmitting in a second time interval following said first time interval a response message over said single WCC, said response message containing said destination address of said second station and said sending address of said first station; (c) said first station transmitting over said single WCC a jam pattern in a third time interval following said second time interval as a result of comparing the destination address of said second station and the sending address of said first station in said initial message portion and said response message and finding a difference between the destination and sending addresses; and (d) said first station remaining in a receive mode during said third time interval if said response message is identical to said initial message portion, enabling said first station to detect a jam pattern transmitted by other stations in said plurality of stations during said third time interval.
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6. A wireless local area network, hereinafter referred to as LAN, comprising:
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a plurality of wireless LAN stations having operating means for operating over a wireless communication channel, hereinafter referred to as WCC, in said LAN for sending and transmitting a message thereover; said message including an initial message portion and a remaining message portion; said initial message portion including a sending address of a first station and a destination address of a second station in said plurality of wireless LAN stations; said operating means comprising; a modem means for said first station of said plurality of said wireless LAN stations for transmitting said initial message portion over said WCC in a first time interval; and a modem means for said second station of said plurality of said wireless LAN stations for receiving said initial message portion over said WCC and for transmitting a response message over said WCC in a second time interval following said first time interval; said response message including the sending address of said first station and the destination address of said second station; said modem means of said first station transmitting a jam pattern over said WCC in a third time interval following said second time interval if said response message is not received by said first station, and said modem means of said first station remaining in a receive mode during said third time interval if said response message is identical to said initial message portion to enable said first station to detect a jam pattern transmitted by other stations in said plurality of stations during said third time interval.
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7. In a wireless local area network, hereinafter referred to as LAN, including a plurality of stations operating on a wireless communication channel, hereinafter referred to as WCC, a method of controlling the operation of said wireless LAN comprising the steps of:
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(a) transmitting in a first time period by a first station of said plurality of stations over said WCC an initial message portion including a training portion, an address of said first station, and an address of a second station in said plurality of stations designated for receiving said initial message portion; and said first station (b) checking a response message transmitted by said second station and received by said first station in a second time period following the transmission of said initial message portion in said first time period to determine if said response message is identical to said initial message portion; and said first station (c) remaining in a receive mode during a third time period following said second time period if said response message is identical to said initial message portion, permitting said first station to detect a jam pattern transmitted by other stations in said plurality of stations during said third time period. - View Dependent Claims (8)
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Specification