Method and apparatus to maintain specification absorption rate at a wireless node
First Claim
1. A method for operation of a wireless node to maintain a specific absorption rate (SAR) level when communicating within a communications network, the method comprising:
- comparing a current specific absorption rate with a maximum specific absorption rate level;
when the current specific absorption rate is greater than the maximum specific absorption rate level, adjusting at least one topology-dependent function to modify the current specific absorption rate to meet the maximum specific absorption rate level; and
wherein the topology-dependent function comprises a power-time product, the method further comprising;
prioritizing data traffic between the node and one or more other nodes of said network based on said power-time product of the node.
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Accused Products
Abstract
A system and method for medium access control (MAC) protocol which controls transmissions in wireless devices to at least substantially comply with specific absorption rate (SAR) limits. The system and method of MAC protocol uses “source-based” time averaging measurements of transmitter “on-times” and an integral of transmission power to direct transmitter duty-cycle such that SAR limits are met. The system and method monitors and controls topology-dependent functions of a node transceiver, including transceiver duty cycle, transceiver transmit power levels and transceiver power-time products, using a automatic transmission control protocol (ATP) to vary functions to maintain specific absorption rate (SAR) limits for handheld and portable devices which are used close to human bodies. In cases in which SAR limits are approached, the ATP can direct the transceiver at the device to adjust each function, or combination of functions, to maintain an acceptable SAR limit.
130 Citations
19 Claims
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1. A method for operation of a wireless node to maintain a specific absorption rate (SAR) level when communicating within a communications network, the method comprising:
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comparing a current specific absorption rate with a maximum specific absorption rate level; when the current specific absorption rate is greater than the maximum specific absorption rate level, adjusting at least one topology-dependent function to modify the current specific absorption rate to meet the maximum specific absorption rate level; and wherein the topology-dependent function comprises a power-time product, the method further comprising; prioritizing data traffic between the node and one or more other nodes of said network based on said power-time product of the node. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A wireless node operating within a communications network, the node comprising:
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a controller for; comparing a current specific absorption rate with a maximum specific absorption rate level, when the current specific absorption rate is greater than the maximum specific absorption rate, adjusting at least one topology-dependent to modify the current specific absorption rate to meet the maximum specific absorption rate level, and wherein the topology-dependent function comprises a power-time product, prioritizing data traffic between the node and one or more other nodes of said network based on said power-time product of the node. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification