System and method for providing adaptive control of transmit power and data rate in an ad-hoc communication network
First Claim
1. A method for determining at least one of a power level and rate at which data is transmitted over a link between source and destination nodes in a wireless ad-hoc communication network, comprising:
- predicting path loss in said link as a function of time based on information provided to said source node from said destination node pertaining to characteristics of at least two messages that were transmitted by said source node for receipt by said destination node;
determining a noise factor representative of noise at said destination node; and
calculating at least one of said power level and rate at which said data is transmitted over said link from said source node to said destination node based on said predicted path loss and said noise factor.
8 Assignments
0 Petitions
Accused Products
Abstract
A system and method for selecting an appropriate transmit power and data rate at which a communication signal is transmitted over a link between nodes in a wireless ad-hoc communication network based on factors such as variations in path loss in the link, fading conditions, noise level estimation and overall link quality. The system and method perform the operations of computing path loss in the link based on information provided to the source node from the destination node pertaining to characteristics of a message that was transmitted by the source node and received by the destination node, determining a noise factor at the destination node, and calculating the power level and rate at which the data is transmitted over the link from the source node to the destination node based on the path loss and the noise factor. More specifically, the method calculates the power level based on the path loss, the noise factor and signal fading, and determines the rate based on the calculated power level. Furthermore, the path loss is computed dynamically as conditions of said link change over time. Accordingly, the system and method are capable of determining the proper level of transmit power and data rate for assuring that the destination node will receive the data transmitted by the source node at a reliability of at least 90%.
-
Citations
38 Claims
-
1. A method for determining at least one of a power level and rate at which data is transmitted over a link between source and destination nodes in a wireless ad-hoc communication network, comprising:
-
predicting path loss in said link as a function of time based on information provided to said source node from said destination node pertaining to characteristics of at least two messages that were transmitted by said source node for receipt by said destination node;
determining a noise factor representative of noise at said destination node; and
calculating at least one of said power level and rate at which said data is transmitted over said link from said source node to said destination node based on said predicted path loss and said noise factor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 31, 32, 33, 37)
-
-
12. A computer-readable medium of instructions, adapted to determining at least one of a power level and rate at which data is transmitted over a link between source and destination nodes in a wireless ad-hoc communication network, said instructions comprising:
-
a first set of instructions, adapted to predict path loss in said link as a function of time based on information provided to said source node from said destination node pertaining to characteristics of at least two messages that were transmitted by said source node for receipt by said destination node;
a second set of instructions, adapted to determine a noise factor representative of noise at said destination node; and
a third set of instructions, adapted to calculate at least one of said power level and rate at which said data is transmitted over said link from said source node to said destination node based on said predicted path loss and said noise factor. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 34, 35, 36, 38)
-
-
23. A method for determining at least one of a power level and rate at which data is transmitted over a link between source and destination nodes in a wireless ad-hoc communication network, comprising:
-
computing path loss in said link based on information provided to said source node from said destination node pertaining to characteristics of a message that was transmitted by said source node for receipt by said destination node;
determining a noise factor representative of noise at said destination node; and
calculating at least one of said power level and rate at which said data is transmitted over said link from said source node to said destination node based on said path loss, said noise factor, short term fading experienced by said message and sensitivity of a receiver of said destination node. - View Dependent Claims (24, 25)
-
-
26. A method for determining at least one of a power level and rate at which data is transmitted over a link between source and destination nodes in a wireless ad-hoc communication network, comprising:
-
computing path loss in said link based on information provided to said source node from said destination node pertaining to characteristics of a message that was transmitted by said source node for receipt by said destination node;
determining a noise factor representative of noise at said destination node; and
calculating at least one of said power level and rate at which said data is transmitted over said link from said source node to said destination node based on said path loss and said noise factor, such that said data rate is calculated based on an amount of energy used by a transmitter of said source node to transmit a bit of information of said message.
-
-
27. A computer-readable medium of instructions, adapted to determining at least one of a power level and rate at which data is transmitted over a link between source and destination nodes in a wireless ad-hoc communication network, said instructions comprising:
-
a first set of instructions, adapted to compute path loss in said link based on information provided to said source node from said destination node pertaining to characteristics of a message that was transmitted by said source node for receipt by said destination node;
a second set of instructions, adapted to determine a noise factor representative of noise at said destination node; and
a third set of instructions, adapted to calculate at least one of said power level and rate at which said data is transmitted over said link from said source node to said destination node based on said path loss, said noise factor, short term fading experienced by said message and sensitivity of a receiver of said destination node. - View Dependent Claims (28, 29)
-
-
30. A computer-readable medium of instructions, adapted to determining at least one of a power level and rate at which data is transmitted over a link between source and destination nodes in a wireless ad-hoc communication network, said instructions comprising:
-
a first set of instructions, adapted to compute path loss in said link based on information provided to said source node from said destination node pertaining to characteristics of a message that was transmitted by said source node for receipt by said destination node;
a second set of instructions, adapted to determine a noise factor representative of noise at said destination node; and
a third set of instructions, adapted to calculate at least one of said power level and rate at which said data is transmitted over said link from said source node to said destination node based on said path loss and said noise factor, such that said data rate is calculated based on an amount of energy used by a transmitter of said source node to transmit a bit of information of said message.
-
Specification