Medium access control in industrial and automotive wireless with combined wired and wireless sensor networks
First Claim
1. A local area network, comprising:
- a central transceiver configured toreceive a resource allocation request in a first reserved timeslot in a guaranteed reservation period from a first priority network sensor unit, the first reserved timeslot different from a second reserved timeslot in the guaranteed reservation period assigned to a second priority network sensor unit,transmit a reservation bit map including an allocation of a first shared timeslot in response to the resource allocation request, andreceive data in the allocated first shared timeslot from the first priority network sensor unit.
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Abstract
An embodiment of the invention relates to a local area sensor network including a central unit configured to receive a resource allocation request from a priority network sensor in a reserved timeslot and in response to designate a shared timeslot allocation. The priority network sensor transmits a resource allocation request in a reserved timeslot, and the sensor transmits data in the allocated shared timeslot. A sensor network can be formed with multiple gateways that each communicate over wired and wireless portions of the network. The central unit communicates with the gateways over the wired portion of the network. Wireless nodes communicate wirelessly with the gateways. The central unit receives a plurality of link quality indicators from the gateways for respective wireless paths to the wireless sensors, and selects a gateway for relaying a message from the central unit to a wireless sensor based on the link quality indicators.
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Citations
24 Claims
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1. A local area network, comprising:
a central transceiver configured to receive a resource allocation request in a first reserved timeslot in a guaranteed reservation period from a first priority network sensor unit, the first reserved timeslot different from a second reserved timeslot in the guaranteed reservation period assigned to a second priority network sensor unit, transmit a reservation bit map including an allocation of a first shared timeslot in response to the resource allocation request, and receive data in the allocated first shared timeslot from the first priority network sensor unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of operating a local area network, the method comprising:
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receiving, by a central transceiver, a resource allocation request from a first priority network sensor unit in a first reserved timeslot in a guaranteed reservation period, the first reserved timeslot different from a second reserved timeslot in the guaranteed reservation period assigned to a second priority network sensor unit; transmitting a reservation bit map including an allocation of a first shared timeslot in response to the resource allocation request; and receiving data in the allocated first shared timeslot from the first priority network sensor unit. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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23. A communication unit for a sensor network, the communication unit comprising:
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a processor; and a wireless transceiver coupled to the processor, the communication unit configured to receive a resource allocation request in a first reserved timeslot in a guaranteed reservation period from a first priority network sensor unit, the first reserved timeslot different from a second reserved timeslot in the guaranteed reservation period assigned to a second priority network sensor unit, transmit a reservation bit map including an allocation of a first shared timeslot in response to the resource allocation request, and receive data in the allocated first shared timeslot from the first priority network sensor unit. - View Dependent Claims (24)
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Specification