Hierarchical wireless networks: capacity bounds using the constrained multiple-access relay channel model

A wireless ad hoc network is modeled as a three-tier hierarchical network comprised of low-power source nodes that communicate with a wired access-point via an intermediate relay node. Such a model is appropriate for hybrid ad hoc networks where cooperation between the sources may not be possible or...

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Bibliographic Details
Main Authors: Sankaranarayanan, L., Kramer, G., Mandayam, N.B.
Format: Conference Proceeding
Language:English
Subjects:
Ad hoc networks
Applied sciences
Bandwidth
Detection, estimation, filtering, equalization, prediction
Equipments and installations
Exact sciences and technology
Femtocell networks
Information, signal and communications theory
Mobile ad hoc networks
Mobile radiocommunication systems
Paper technology
Power system relaying
Power system reliability
Radiocommunications
Relays
Signal and communications theory
Signal, noise
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Throughput
Transmission and modulation (techniques and equipments)
Wireless networks
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Description
Summary:A wireless ad hoc network is modeled as a three-tier hierarchical network comprised of low-power source nodes that communicate with a wired access-point via an intermediate relay node. Such a model is appropriate for hybrid ad hoc networks where cooperation between the sources may not be possible or desirable. It is shown that constraining the relay to transmit and receive in either different time slots or frequency bands for a fixed total time and bandwidth yields the same capacity bounds. The rates achieved by cooperative strategies are compared with the rates achieved by traditional multi-hopping and are shown to be substantially better than for certain channels and geometries.
DOI:10.1109/ACSSC.2004.1399497