Effective Capacity for Multi-Rate Relay Channels with Delay Constraint Exploiting Adaptive Cooperative Diversity

The effective capacity (EC) for a wireless system expresses the maximum arrival source rate that the system can transmit over the wireless channel by fulfilling certain probabilistic delay constraints. This paper presents an EC analysis for a relay-assisted cooperative protocol exploiting adaptive t...

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Vydané v:IEEE transactions on wireless communications Ročník 11; číslo 9; s. 3136 - 3147
Hlavní autori: Harsini, J. S., Zorzi, M.
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: New York, NY IEEE 01.09.2012
Institute of Electrical and Electronics Engineers
Predmet:
adaptive modulation and coding (AMC)
Applied sciences
Coding, codes
Cooperative diversity
cross-layer design
Delay
effective capacity
Exact sciences and technology
Information, signal and communications theory
Modulation, demodulation
Operation, maintenance, reliability
Protocols
quality of service (QoS)
Rayleigh channels
Relays
Signal and communications theory
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Throughput
Transmission and modulation (techniques and equipments)
Wireless communication
effective capacity
Relaying
adaptive modulation and coding (AMC)
Wireless telecommunication
Information rate
Adaptive method
cross-layer design
Cross-layer approach
Traffic control
Delay time
Queue
Adaptive modulation
Modulation coding
Fading
Service process
Probabilistic approach
quality of service (QoS)
Cooperative systems
Teletraffic
Multirate system
Markov model
Information transmission
Adaptive coding
Upper bound
Relay channel
Cooperative diversity
Queueing system
Telecommunication channels
Numerical simulation
Automatic repeat request
ISSN:1536-1276
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Popis
Shrnutí:The effective capacity (EC) for a wireless system expresses the maximum arrival source rate that the system can transmit over the wireless channel by fulfilling certain probabilistic delay constraints. This paper presents an EC analysis for a relay-assisted cooperative protocol exploiting adaptive transmission at physical and data-link layers. In the considered model, a source employs adaptive modulation and coding (AMC) in conjunction with a cooperative ARQ protocol, to transmit delay-constrained traffic to the destination node. To achieve adaptive cooperative diversity, a relay node, also equipped with AMC, performs cooperation when it decodes the source packet correctly and the destination requested a packet retransmission. We derive a tight closed-form upper-bound expression for the EC of the queue service process at the source node when wireless links are subject to time-correlated fading. To this end, a Markov model for the relay channel is used. We also present a cross-layer approach to delay-aware AMC design for the relay channel which provides the maximum system throughput subject to a probabilistic delay constraint. The numerical and simulation results show that the proposed adaptive cooperative protocol can dramatically improve the EC and the system throughput over time-correlated fading channels when compared to a direct transmission system.
ISSN:1536-1276
DOI:10.1109/TWC.2012.071612.111069