Motorola Corporation

Ralph L D'Souza

Vernon Anthony Allen

Wayne W Chiou

Minh T Pham

Mark J Johnson

Robert J O'Dea

Oleg Andric

Gregory A Feeney

Stephen Raphael Korfhage

Robert J O'Shea

Saritha Sivapuram

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

A first image () of a transmitted signal is detected within a received signal containing a plurality of images of the transmitted signal. This is accomplished by detecting a second image () of the transmitted signal. A set of characteristics of the second image of the transmitted signal is determined, and subsequently used to detect the first image () of the transmitted signal.

Method for increased location receiver sensitivity

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

A vocoder ( ) is initialized, prior to processing an initial batch of audio data, from parameters extracted from the first frame of audio data ( ). In the instant embodiment, parameters affecting voice encoding, which are based on estimates of direct current bias, are used to program a high pass filter ( ) incorporated in the vocoder ( ).

Method and apparatus employing a vocoder for speech processing

A beacon assisted asynchronous method of wireless communication according to the present invention enables initiating and target devices ( ) to remain in sleep mode most of the time and to periodically wake up to asynchronously, and directly, communicate with one another. Specifically, each of the initiating and target devices ( ) transmits a beacon while operating in a default transmit/receive mode ( ) and subsequently listens for a response. Alternatively, the initiating device ( ) may enter a data packet message mode to receive a beacon from the target device ( ) and to subsequently transmit a data packet message to the target device ( ) after receiving the first beacon. The initiating device ( ) minimizes the length of time in which it must wait to receive the target device beacon by timing a corresponding target beacon receive period based on stored data such as information based on previous communication with the target device ( ).

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Sunrise, FL, United States of America

Ralph L D'Souza