Multiuser detection enabled medium access control in mobile ad hoc networks

摘要

A method of providing medium access control for a wireless mobile ad hoc network includes defining a TDMA network timing frame including a data (DATA) zone having one or more time slots structured to support multiuser detection (MUD) of concurrent transmissions during each slot, a negative acknowledgment (NACK) zone during which nodes transmit requests for retransmission of packets destined to but not successfully received by the nodes, a broadcast (BC) zone during which network management messages are broadcast to the nodes, and a control (CTRL) zone. A primary master (PM) node is selected and operates as a source of network time for all the nodes. Each node synchronizes its time to that of the PM node during the CTRL zone in a distributed manner, by exchanging control messages with the PM node or other nodes located one or more hops from the PM node.

主权项

1. A method of providing medium access control (MAC) for a wireless mobile ad hoc network, comprising:
defining a network timing frame having a number of zones; allocating a first or data (DATA) zone in the timing frame during which application data is transmitted and received among the nodes; allocating a second or negative acknowledgment (NACK) zone in the timing frame during which certain nodes of the network transmit requests for retransmission of data packets destined to but not successfully received by the nodes; structuring at least one time slot in the DATA zone to support multiuser detection (MUD) to decode multiple users from concurrent data transmissions received in a same time slot; allocating a third or broadcast (BC) zone in the timing frame during which network management messages concerning node topology, message routing or network maintenance are provided to the nodes; defining a primary master (PM) or root node and operating the PM node as a source of network time for all nodes of the network; and allocating a fourth or control (CTRL) zone in the timing frame during which a given node of the network synchronizes its time in a distributed manner to the time of the PM node by exchanging control messages with the PM node or with other nodes that are one or more hops away from the PM node.