Cooperative spatial multiplexing for ad hoc networks with hybrid ARQ: system design and performance analysis

For a network where each node has multiple antennas, we propose a transmission mode and a cooperation protocol, with the aim of maximizing the network throughput. The distinctive feature of the work is that the focus in both the design and the evaluation is at the network level, rather than on a sin...

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Bibliographic Details
Published in:IEEE transactions on communications 2008-09, Vol.56 (9), p.1545-1555
Main Authors: Levorato, M., Tomasin, S., Zorzi, M.
Format: Article
Language:English
Subjects:
Access protocols
Ad hoc networks
antenna arrays
Antennas
Applied sciences
array signal processing
Automatic repeat request
Channels
Code Division Multiple Access
Code division multiplexing
Cooperation
Cooperative systems
Exact sciences and technology
Information, signal and communications theory
MIMO communication
Multiaccess communication
Multiplexing
Networks
Performance analysis
Radiocommunications
Signal and communications theory
System analysis and design
Systems design
Systems, networks and services of telecommunications
telecommunication network routing
telecommunication signalling
Telecommunications
Telecommunications and information theory
Teleprocessing networks. Isdn
Throughput
Transmission and modulation (techniques and equipments)
Transmitting antennas
Valuation and optimization of characteristics. Simulation
wireless channels
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Summary:For a network where each node has multiple antennas, we propose a transmission mode and a cooperation protocol, with the aim of maximizing the network throughput. The distinctive feature of the work is that the focus in both the design and the evaluation is at the network level, rather than on a single link. To this end, we propose the use of spatial multiplexing and code division multiple access (CDMA) to increase the parallelism of transmissions in the network, thus improving throughput. Cooperation is also implemented by spatial multiplexing and CDMA, together with an adaptive hybrid automatic repeat request mechanism that adapts the retransmissions to the actual channel conditions. Spatial multiplexing allows frame-asynchronous transmissions and a flexible cooperation protocol that minimizes the signaling overhead. The resulting scheme is named layered coded cooperative system (LCCS). We propose an implementation of LCCS based on linear erasure packet codes, where cooperation is transparent to the receiver, and we assess the performance of LCCS both by analyzing a simple network with three nodes and by simulating a more complex network.
ISSN:0090-6778
1558-0857
DOI:10.1109/TCOMM.2008.060447