Motorola Corporation

Minh T Pham

Vernon Anthony Allen

Oleg Andric

Wayne W Chiou

Ralph L D'Souza

Spyros Kyperountas

Kenneth David Cornett

Robert J O'Shea

Saritha Sivapuram

To reduce interference and increase battery life, a method and apparatus for transmitting location data within an ad-hoc communication system is provided herein. During operation, a portion of a beacon payload is reserved to broadcast location information (coordinates) for a node as well as other parameters that may be needed for location estimation. In addition to a node's location, an accuracy of the nodes location is also included within the beacon field. Because nodes will no longer have to awake outside their beacon transmit times to broadcast location information, battery life is extended. In addition, because nodes will no longer be transmitting location information outside their guaranteed time slot, system interference is also reduced.

Method and apparatus for transmitting location data within an ad-hoc communication system

In order to set up efficient routes between two closely-located nodes an optimized route for two nodes within a hybrid-cellular network (HCN) is achieved by converting an HCN route to an ad-hoc route. Thus, a node within the communication system may originally be communicating with another node via an HCN route and then instructed to switch to a more efficient ad-hoc route for communication with the node.

Routing protocol within hybrid-cellular networks

When a requesting node () has routing capabilities and attempts to join a network and there are no association slots available, the requesting node () will send an association message to a potential root node (). If the root node () has reached the maximum number of links, and has a non-routing capable node () associated with it, the root node () will send a message to the non-routing capable node (), instructing it to disassociate and attempt to re-associate at a later time. A message is then sent to the requesting node () for it to associate with the root node ().

Method and apparatus for network formation

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Boynton Beach, FL, United States of America

Minh T Pham