Method and Apparatus for Medium Access Control for a Decentralized Network with Adapted Beamforming and Power Control
First Claim
1. A method for medium access control in a distributed communication network, comprising:
- associating a persistence parameter with a potential link between a transmitting node and a receiving node in the network;
determining as a function of said persistence parameter whether the transmitting node participates in contention for a transmission slot;
if said transmitting node participates in said contention for said transmission slot, computing adaptive transmission parameters for said transmitting node as a function of an invalidity condition and an infeasibility condition; and
transmitting from said transmitting node in the transmission slot using the computed adaptive transmission parameters if said invalidity condition and said infeasibility condition are met.
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Accused Products
Abstract
A method and apparatus for medium access control in a wireless ad hoc network is disclosed that takes advantage of physical layer properties to jointly and collectively optimize in a distributed fashion transmission parameters such as beam-patterns and transmit powers of all active links in the network. To resolve signal transmission contention, each potential link is associated with a persistence parameter and the persistence parameter is adapted locally, with no central control, to provide medium access for transmissions. Where a node contending for a transmission slot is unable to optimize its transmission parameters due to an invalidity condition or infeasibility condition, the persistence parameter is updated, preferably so as to reduce the probability of such conditions.
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Citations
30 Claims
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1. A method for medium access control in a distributed communication network, comprising:
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associating a persistence parameter with a potential link between a transmitting node and a receiving node in the network;
determining as a function of said persistence parameter whether the transmitting node participates in contention for a transmission slot;
if said transmitting node participates in said contention for said transmission slot, computing adaptive transmission parameters for said transmitting node as a function of an invalidity condition and an infeasibility condition; and
transmitting from said transmitting node in the transmission slot using the computed adaptive transmission parameters if said invalidity condition and said infeasibility condition are met. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. Apparatus for medium access control in a distributed communication network, comprising:
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means for associating a persistence parameter with a potential link between a transmitting node and a receiving node in the network;
means for determining as a function of said persistence parameter whether the transmitting node participates in contention for a transmission slot;
means for computing adaptive transmission parameters for said transmitting node if said transmitting node participates in said contention for said transmission slot, said adaptive transmission parameters computed as a function of an invalidity condition and an infeasibility condition; and
means for transmitting from said transmitting node in the transmission slot using the computed adaptive transmission parameters if said invalidity condition and said infeasibility condition are met. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A computer readable medium storing computer program instructions which, when executed on a processor, define the steps of:
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associating a persistence parameter with a potential link between a transmitting node and a receiving node in the network;
determining as a function of said persistence parameter whether the transmitting node participates in contention for a transmission slot;
if said transmitting node participates in said contention for said transmission slot, computing adaptive transmission parameters for said transmitting node as a function of an invalidity condition and an infeasibility condition; and
transmitting from said transmitting node in the transmission slot using the computed adaptive transmission parameters if said invalidity condition and said infeasibility condition are met. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification