Method and protocol for a medium access control layer for local area networks with multiple-priority traffic
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United States of America Patent
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Jan 2, 2001
Grant Date -
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app pub date -
Jan 7, 1998
filing date -
Jan 7, 1998
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Abstract
A Medium Access Control ('MAC') Layer protocol and a method for contention resolution using the protocol is provided for networks with multiple priority traffic. The protocol is used where a physical layer connected to a transmission medium uses a carrier modulation scheme with multiple frequencies. Stations on the network that desire access to the transmission medium use a carrier modulation scheme with multiple frequencies. Stations that desire access simultaneously transmit a single frequency selected at random from a set of physical layer frequencies during an open-contention-interval. At the same time, the stations listen to a combined frequency signal and analyzes it for frequency content. The station whose own frequency matches the highest frequency signal in the combined signal gains access to a transmission medium. In the event of a collision, a restricted-contention-interval is used only for the colliding stations. The probability of successful contention resolution increases very rapidly using the restricted-contention-interval. By partitioning the set of frequencies in contiguous ranges, multiple priority classes can be used with the contention method and the MAC layer protocol.
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- 15 United States
- 10 France
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Patent Owner(s)
- HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP
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Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Grabelsky, David | Skokie, IL | 29 | 2718 |
Sidhu, Ikhlaq | Vernon Hills, IL | 21 | 1838 |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
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