QoS constrained cellular ad hoc augmented networks
Department of Electrical and Computer Engineering
Doctor of Philosophy
Saraydar, Cem U.
Manikopoulos, Constantine N.
Stefanov, Andrej S.
In this dissertation, based on different design criteria, three novel quality of service (QoS) constrained cellular ad hoc augmented network (CAHAN) architectures are proposed for next generation wireless networks. The CAHAN architectures have a hybrid architecture, in which each MT of CDMA cellular networks has ad hoc communication capability. The CAHAN architectures are an evolutionary approach to conventional cellular networks. The proposed architectures have good system scalability and high system reliability.
The first proposed architecture is the QoS constrained minimum-power
cellular ad hoc augmented network architecture (QCMP CAHAN). The QCMP
CAHAN can find the optimal minimum-power routes under the QoS constraints
(bandwidth, packet-delay, or packet-error-rate constraint). The total
energy consumed by the MTs is lower in the case of QCMP CAHAN than in
the case of pure cellular networks. As the ad hoc communication range
of each MT increases, the total transmitted power in QCMP CAHAN decreases.
However, due to the increased number of hops involved in information
delivery between the source and the destination, the end-to-end delay
increases. The maximum end-to-end delay will be limited to a specified
tolerable value for different services. An MT in QCMP CAHAN will not
relay any messages when its ad hoc communication range is zero, and
if this is the case for all MTs, then QCMP CAHAN reduces to the traditional
Geocasting is the mechanism to multicast messages to the MTs whose locations lie within a given geographic area (target area). Geolocation-aware CAHAN (GA CAHAN) architecture is proposed to improve total transmitted power expended for geocast services in cellular networks. By using GA CAHAN for geocasting, saving in total transmitted energy can be achieved as compared to the case of pure cellular networks. When the size of geocast target area is large, GA CAHAN can save larger transmitted energy.
njit-etd2005-021 (194 pages ~ 9,014 KB pdf)
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Created April 7, 2005