ADAPTIVE POWER CONTROL OF LOCALIZED SUBNETS FOR REDUCING SELF-INTERFERENCE IN WIRELESS NETWORKS
First Claim
1. A method for reducing self-interference by a localized subnetwork of a wireless communications network, comprising a plurality of nodes in the localized subnetwork performing the following:
- a) receiving by a first node at least one calibrating message from one or more other nodes in the localized subnetwork;
b) determining by the first node a transmit power and a link margin for the at least one received calibrating message; and
c) adjusting by the first node of its transmit power to a level that will provide link margins for the other nodes in the subnetwork that are above a specified minimum, wherein the specified minimum is relative to the lowest of the link margins.
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Accused Products
Abstract
A method for reducing self-interference in a wireless network, such as a Link 16 network, while maintaining simultaneous multiple access takes advantage of the physical proximity of nodes in a localized subnetwork, such as a fighter-to-fighter subnetwork in a flight wing, by actively reducing the transmit powers used for subnet messages between the nodes. Calibration messages such as Precise Participant Location and Identification (PPLI) messages are exchanged between all of the nodes of the localized subnetwork, from which each node determines the identities, transmit powers, noise levels, and SNRs of all of the other nodes. The node then determines a link margin for other nodes, and sets its transmit power to a “safe” level for the subnetwork according to the lowest link margin.
1 Citation
18 Claims
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1. A method for reducing self-interference by a localized subnetwork of a wireless communications network, comprising a plurality of nodes in the localized subnetwork performing the following:
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a) receiving by a first node at least one calibrating message from one or more other nodes in the localized subnetwork; b) determining by the first node a transmit power and a link margin for the at least one received calibrating message; and c) adjusting by the first node of its transmit power to a level that will provide link margins for the other nodes in the subnetwork that are above a specified minimum, wherein the specified minimum is relative to the lowest of the link margins. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. Non-transitory media containing software operable on a node in a localized subnetwork of a wireless communications network so as to reduce self-interference in the network, the software being configured to cause a first node in the localized subnetwork to:
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receive at least one calibrating message from at least one other node in the localized subnetwork; determine a transmit power and a link margin for the at least one received calibrating message; and according to the lowest of the link margins, adjust its transmit power for the subnetwork to a level that will provide link margins for the other nodes in the subnetwork that are above a specified minimum, wherein the specified minimum is relative to the lowest of the determined link margins.
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Specification