Method and apparatus for relaying information in an AD-HOC...

Details Method and apparatus for relaying information in an AD-HOC... Method and apparatus for relaying information in an AD-HOC...

2002-08-15

2004-05-11

Maung, Nay (Department: 2684)

Telecommunications

Carrier wave repeater or relay system

Portable or mobile repeater

C455S445000, C455S574000, C370S238000

Reexamination Certificate

active

06735417

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates generally to communication systems and in articular, to a method and apparatus for relaying information in ad-hoc networks.
BACKGROUND OF THE INVENTION
A communication system may use ad-hoc networking to improve its performance. As described in the international application published under the Patent Cooperation Treaty, publication number WO 00/54539, ROUTING IN A MULTI-STATION NETWORK, which is incorporated by reference herein, increased coverage reliability and increased throughput are some of the benefits of using ad-hoc networking. In cellular communication systems utilizing ad-hoc networking, cellular handsets are equipped to operate in both the cellular and ad-hoc networks. Users access the cellular infrastructure through the ad-hoc network whenever they cannot access the cellular network directly, or when they find it more advantageous to do so. Using an ad-hoc air interface, such users transmit to another user, which forwards (relays) the transmission to the infrastructure through the cellular air interface. Such a system is shown in FIG.
1
.
As shown, remote (or mobile) unit
102
existing within area
101
is unable to communicate directly with infrastructure equipment
106
. By utilizing ad-hoc networking, remote unit
102
communicates with remote unit
104
(via ad-hoc air interface
103
). Remote unit
104
then relays the communication to infrastructure
106
via air interface
105
.
Because a mobile unit that is acting as a relay to other mobiles is consuming its battery reserve, there is a general concern that users would be unwilling to act as a relay if battery consumption is too great. This would hinder the development of ad-hoc networking in cellular systems. Therefore, a need exists for a method and apparatus for relaying communications within an ad-hoc network that reduces the amount of battery consumption for those remote units relaying communications.


REFERENCES:
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patent: 2002/0049561 (2002-04-01), Garcia-Luna-Aceves et al.
patent: 2003/0045295 (2003-03-01), Stanforth
patent: 2003/0165117 (2003-09-01), Garcia-Luna-Aceves et al.
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patent: 2003/0214921 (2003-11-01), Alapuranen et al.
patent: WO 01/20928 (1999-09-01), None
patent: WO 01/31945 (1999-10-01), None
patent: WO 01/47181 (1999-12-01), None
patent: WO 01/84870 (2000-05-01), None
patent: WO 00/54539 (2000-09-01), None

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