System and method for using per-packet receive signal strength indication and transmit power levels to compute path loss for a link for use in layer II routing in a wireless communication network
First Claim
1. A system, adapted for use in a communications network, for evaluating at least one communication link between a transmitting node and a receiving node in the communications network, the system comprising:
- a processor for assigning a link quality value to said communication link based on a transmit power level (TPL) value at which said data packet was transmitted by said transmitting node, a received sensitivity (RS) value of said receiving node receiving said data packet, and a receive signal strength indication (RSSI) value provided by said network; and
wherein said processor calculates said link quality value as a link quality ratio (LQR) represented by the equation
LQR=1−
(TPL−
RSSI)/(TPL−
RS).
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Accused Products
Abstract
A system and method for evaluating at least one communication link between a transmitting node and a receiving node in a communications network, such as a wireless ad-hoc communications network in accordance with the 802.11 standard. The system and method perform the operation of assigning respective link quality values to the respective communication links based on a transmit power level (TPL) value at which the respective data packets were transmitted by the transmitting node over the respective links, a received sensitivity (RS) value of the receiving node receiving the data packets, and a receive signal strength indication (RSSI) value provided by the network for each respective link. The system and method can examine a content of a data packet being sent between the two nodes to determine the TPL, and can receive the RSSI value from a physical layer of the communications network. Accordingly, the system and method can determine which link that additional data packets are to be sent by the transmitting node to the receiving node via the communication link based on the link quality values. Specifically, the link having the highest link quality value is selected.
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Citations
48 Claims
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1. A system, adapted for use in a communications network, for evaluating at least one communication link between a transmitting node and a receiving node in the communications network, the system comprising:
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a processor for assigning a link quality value to said communication link based on a transmit power level (TPL) value at which said data packet was transmitted by said transmitting node, a received sensitivity (RS) value of said receiving node receiving said data packet, and a receive signal strength indication (RSSI) value provided by said network; and wherein said processor calculates said link quality value as a link quality ratio (LQR) represented by the equation
LQR=1−
(TPL−
RSSI)/(TPL−
RS). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 31, 32, 33, 34, 35, 36)
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11. A method for evaluating at least one communication link between a transmitting node and a receiving node in a communications network, the method comprising:
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assigning a link quality value to said communication link based on a transit power level (TPL) value at which said data packet was transmitted by said transmitting node, a received sensitivity (RS) value of said receiving node receiving said data packet, and a receive signal strength indication (RSSI) value provided by said network; and wherein said assigning calculates said link quality value as a link quality ratio (LQR) represented by the equation
LQR=1−
(TPL−
RSSI)/(TPL−
RS). - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 37, 38, 39, 40, 41, 42)
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21. A computer-readable medium of instructions, adapted for use with a communications network for evaluating at least one communication link between a transmitting node and a receiving node in the communications network, the instructions comprising:
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a first set of instructions for assigning a link quality value to said communication link based on a transmit power level (TPL) value at which said data packet was transmitted by said transmitting node, a received sensitivity (RS) value of said receiving node receiving said data packet, and a receive signal strength indication (RSSI) value provided by said network; and wherein said first set of instructions calculates said link quality value as a link quality ratio (LQR) represented by the equation
LQR=1−
(TPL−
RSSI)/(TPL−
RS). - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 43, 44, 45, 46, 47, 48)
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Specification