Hybrid multiple access method and system in wireless networks
AssigneeMitsubishi Electric Research Labs, Inc.
InventorsZafer Sahinoglu, Ghulam M. Bhatti, Jinyun Zhang
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Abstract
A method and system access a channel in a wireless network of nodes. A coordinator transmits periodically a beacon, in which time between two consecutive beacons constitute a beacon interval. The coordinator and other nodes transceive a superframe during the beacon interval, in which the superframe begins with an active interval, which is immediately followed by an inactive interval, and in which the active interval begins with a contention free period, which is immediately followed by a contention access period, which is immediately followed by the inactive interval.
Claims9
A method for accessing a channel in a wireless network of nodes, comprising:
- transmitting periodically a beacon by a coordinator node of a wireless network, in which time between two consecutive beacons constitute a beacon interval;
- and
- transceiving a superframe during the beacon interval, in which the superframe begins with an active interval, which is immediately followed by an inactive interval, and in which the active interval begins with a contention free period, which is immediately followed by a contention access period, which is immediately followed by the inactive interval, in which the contention free period includes a plurality of guaranteed time slots for transmitting message, and further comprising:
- acknowledging all messages in the guaranteed time slots with a single group acknowledgement message at an end of the contention free period, in which the group acknowledgement message includes one bit for each guaranteed time slot for the acknowledging.
A system for accessing a channel in a wireless network of nodes, comprising:
- a coordinator transmitting periodically a beacon by a coordinator node of a wireless network, in which time between two consecutive beacons constitute a beacon interval;
- and
- means for transceiving a superframe during the beacon interval, in which the superframe begins with an active interval, which is immediately followed by an inactive interval, and in which the active interval begins with a contention free period, which is immediately followed by a contention access period, which is immediately followed by the inactive interval, in which the contention free period includes a plurality of guaranteed time slots for transmitting message, and further comprising:
- means for acknowledging all messages in the guaranteed time slots with a single group acknowledgement message at an end of the contention free period, in which the group acknowledgement message includes one bit for each guaranteed time slot for the acknowledging.
Dependencies are inferred from the claim text.