US 7,613,156 B2Granted

Method for energy efficient prospective peer discovery in an ad hoc network

AssigneeMotorola, Inc.

InventorsLoren J. Rittle, Tzvetan T. Horozov, Nitya Narasimhan, Venugopal Vasudevan

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Abstract

Energy-efficient discovery techniques are provided for a client node to discover at least one peer provider node in an ad hoc network. For example, the client node can be configured to turn on its first ad hoc interface while in a discovery mode to establish a channel for a first time period. The client node can then transmit a first beacon to advertise its presence to other nodes within the transmission range of the client node to acquire service information from at least one of a plurality of prospective peer provider nodes within the transmission range of the client node. At least one of the prospective peer provider nodes is configured to turn on its second ad hoc interface for a second period of time to listen for beacons from other nodes. The second period of time is less than or equal to the first period of time.

Claims32

Dependent claims

A method for a client node to discover a peer provider node in an ad hoc network, comprising:

activating a first ad hoc interface in the client node while in a discovery mode to establish a channel for a first time period;
transmitting a first beacon to advertise presence of the client node including a request to acquire service information from at least one prospective peer provider node within the transmission range of the client node;
receiving, during the first time period at the client node, a second beacon from the at least one prospective peer provider node;
analyzing information in the second beacon to determine if the at least one prospective peer provider node offers the service the client node is requesting;
and
transmitting a response message from the client node to the at least one prospective peer provider node when the at least one prospective peer provider node offers the service requested by the client node,
wherein the response message indicates that the at least one prospective peer provider node is to keep a second ad hoc interface active for a period of time.

4 more elements

An ad hoc network, comprising:

at least one prospective peer provider node;
and
a client node configured to:
turn on a first ad hoc interface in the client node while in a discovery mode to establish a channel for a first time period;
transmit a first beacon to advertise presence of the client node including a request to acquire service information from at least one prospective peer provider node within the transmission range of the client node;
receive, during the first time period at the client node, a second beacon from the at least one prospective peer provider node;
analyze information in the second beacon to determine if the at least one prospective peer provider node offers the service the client node is requesting;
and
transmit a response message from the client node to the at least one prospective peer provider node when the at least one prospective peer provider node offers the service requested by the client node,
wherein the response message indicates that the at least one prospective peer provider node is to keep a second ad hoc interface active for a period of time.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/422,954Filed 8 Jun 2006
Published: US 2007/0286136 A113 Dec 2007
Granted: 3 Nov 2009
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

H04W 8/005
Network data management: discovery of network devices, e.g. terminals
H04W 52/0216
Managed by the network, e.g. network or access point is leader and terminal is follower: using a pre-established activity schedule, e.g. traffic…
H04W 48/08
Access restriction ; Network selection; Access point selection: access restriction or access information delivery, e.g. discovery data delivery
H04W 48/16
Access restriction ; Network selection; Access point selection: discovering, processing access restriction or access information

Family

US 2007/0286136 A1Pre-grant publication · published 13 Dec 2007
US 7,613,156 B2This patent

From the US filing history. Foreign family members aren’t listed.

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