Method and apparatus for avoiding self-interference in a mobile network
First Claim
1. A method for reducing interference in a mobile network in which a node A is to establish a proposed wireless link with node B, said method comprising:
- (a) determining a node E that transmits on a frequency equal to a frequency of the proposed link between node A and node B and which can transmit to a node D;
(b) determining an effective gain of an antenna on node D with respect to interference from the proposed link between node A and node B, assuming an X-percentile beam criterion selected in accordance with a desired self-interference limit;
(c) estimating a carrier intensity arriving at node D from node E;
(d) determining a ratio of node E to node D carrier-to-potential-interference from the proposed link between node A and node B; and
(e) conditioning establishment of the proposed link between node A and node B upon said determined ratio.
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Accused Products
Abstract
A method for reducing interference in a mobile network in which a node A is to establish a proposed wireless link with node B. The method includes: (a) determining a node E that transmits on a frequency equal to a frequency of the proposed link between node A and node B and which can transmit to a node D; (b) determining an effective gain of an antenna on node D with respect to interference from the proposed link between node A and node B, assuming an X-percentile beam criterion selected in accordance with a desired self-interference limit; (c) estimating a carrier intensity arriving at node D from node E; (d) determining a ratio of node E to node D carrier to potential interference from node A; and (e) conditioning establishment of the proposed link between node A and node B upon the determined ratio.
43 Citations
38 Claims
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1. A method for reducing interference in a mobile network in which a node A is to establish a proposed wireless link with node B, said method comprising:
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(a) determining a node E that transmits on a frequency equal to a frequency of the proposed link between node A and node B and which can transmit to a node D; (b) determining an effective gain of an antenna on node D with respect to interference from the proposed link between node A and node B, assuming an X-percentile beam criterion selected in accordance with a desired self-interference limit; (c) estimating a carrier intensity arriving at node D from node E; (d) determining a ratio of node E to node D carrier-to-potential-interference from the proposed link between node A and node B; and (e) conditioning establishment of the proposed link between node A and node B upon said determined ratio. - View Dependent Claims (2, 3, 4)
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5. A method for reducing interference in a mobile network in which a node A is to establish a proposed wireless link with node B, said method comprising, operating node A to:
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(a) identify a possible node E to node D link on a frequency of the proposed link; (b) identify other possible links that might impinge on node D; (c) using a computer to determine a sum of interference from all identified possibly impinging links weaker that the proposed link at node D, plus the proposed link interference; and (d) prohibit the proposed link depending upon a determined carrier-to-interference ratio for the node E to node D link; (e) operating node A to identify other possible node E to node D links on a frequency of the proposed link and to iterate operations (a), (b), (c) and (d) for each node E to node D link until either all node E to node D links are considered or the proposed link is prohibited; and if the proposed link is not prohibited, further comprising operating node A to send a request to node B to establish the proposed link, and operating node B to; receive the request from node A; determine interference to a node C to node B link from other possible interfering links; rank determined interfering links of the other possible interfering links in order of potential interference; sum interference to the node C to node B link from the node A to node B link and all determined interfering links providing less interference than the node A to node B link; and reject the node A to node B link depending upon whether or not the summed interference is greater than a node C to node B interference limit. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13)
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14. A wireless mobile network having mobile nodes, said network including a node A, a node B, at least one node E and at least one node D, and wherein node A is configured to:
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(a) determine a node E that transmits on a frequency equal to a frequency of a proposed link between node A and node B and which can transmit to a node D; (b) determine an effective gain of an antenna on node D with respect to interference from the proposed link between node A and node B, assuming an X-percentile beam criterion selected in accordance with a desired self-interference limit; (c) estimate a carrier intensity arriving at node D from node E; (d) determine a ratio of node E to node D carrier-to-potential-interference from the proposed link between node A and node B; and (e) condition establishment of the proposed link between node A and node B upon said determined ratio. - View Dependent Claims (15, 16, 17)
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18. A wireless mobile network having mobile nodes, said network including a node A, a node B, at least one node D and at least one node E, and wherein node A is configured to:
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(a) identify a possible node E to node D link on a frequency of the proposed link; (b) identify other possible links that might impinge on node D; (c) use a computer to determine a sum of interference from all identified, possibly impinging links weaker that the proposed link at node D, plus the proposed link interference; and (d) prohibit the proposed link depending upon a determined carrier-to-interference ratio for the node E to node D link. node A is being configured to identify other possible node E to node D links on a frequency of the proposed link and to iterate (a), (b), (c) and (d) for each node E to node D link until either all node E to node D links are considered or the proposed link is prohibited; and at least one node C and wherein node A is configured to send a request to node B to establish the proposed link when the proposed link is not prohibited; and
node B is configured to;receive the request from node A; determine interference to a node C to node B link from every other possibly interfering link; rank determined interfering links of the other possibly interfering links in order of potential interference; sum interference to the node C to node B link from the node A to node B link and all determined interfering links providing less interference than the node A to node B link; and reject the node A to node B link depending upon whether or not the summed interference is greater than a node C to node B interference limit. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
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27. A method for forming a “
- node A”
for use in a wireless mobile network, said node A operating to;(a) determine a node E that transmits on a frequency equal to a frequency of a proposed link between node A and a node B and which can transmit to a node D; (b) determine an effective gain of an antenna on node D with respect to interference from the proposed link between node A and node B, assuming an X-percentile beam criterion selected in accordance with a desired self-interference limit; (c) estimate a carrier intensity arriving at node D from node E; (d) determine a ratio of node E to node D carrier-to-potential-interference from node A; and (e) condition establishment of the proposed link between node A and node B upon said determined ratio. - View Dependent Claims (28, 29, 30)
- node A”
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31. A method for operating a “
- node A”
for use in a wireless mobile network, comprising;using said node A to; (a) identify a node E to a node D link on a frequency of a proposed link; (b) identify other possible links that might impinge on node D; (c) use a computer to determine a sum of interference from all identified, possibly impinging links weaker than the proposed link at node D, plus the proposed link interference; and (d) prohibit the proposed link depending upon a determined carrier-to-interference ratio for the node E to node D link; and (e) to prohibit the proposed link depending upon a determined carrier-to-interference ratio for the node E to node D link, node A is configured to determine whether the proposed node A to node B link by itself would not exceed an interference limit for the node E to node D link, and, if so, node A is configured to send a message to at least one of node D or node E to determine whether a node E to node D link exists, and node A is further configured to additionally condition prohibiting the proposed link upon whether the node E to node D link exists. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38)
- node A”
Specification