Title :
Diversity-multiplexing-delay tradeoffs in MIMO multihop networks with ARQ
Author :
Xie, Yao ; Goldsmith, Andrea
Author_Institution :
Dept. of Electr. Eng., Stanford Univ., Stanford, CA, USA
Abstract :
The tradeoff between diversity, multiplexing, and delay in multihop MIMO relay networks with ARQ is studied, where the random delay is caused by queueing and ARQ retransmission. This leads to an optimal ARQ allocation problem with a per-hop delay or end-to-end delay constraint. The optimal ARQ allocation has to trade off between the ARQ error that the receiver fails to decode in the allocated maximum ARQ rounds and the packet loss due to queueing delay. These two probability of errors are characterized using the diversity-multiplexing-delay tradeoff (DMDT) (without queueing) and the tail probability of random delay derived using large deviation techniques, respectively. Then the optimal ARQ allocation problem can be formulated as a convex optimization problem. We show that the optimal ARQ allocation should balance each link performance as well as avoid significant queue delay, which is also demonstrated by numerical examples.
Keywords :
MIMO communication; automatic repeat request; convex programming; delays; diversity reception; error statistics; multiplexing; queueing theory; ARQ error; ARQ retransmission; automatic repeat request; convex optimization; deviation technique; diversity-multiplexing-delay tradeoff; end-to-end delay constraint; error probability; multihop MIMO relay networks; optimal ARQ allocation; packet loss; queueing delay; random delay; receiver; Automatic repeat request; Decoding; Delay; Information analysis; MIMO; Protocols; Relays; Spread spectrum communication; Tail;
Conference_Titel :
Information Theory Proceedings (ISIT), 2010 IEEE International Symposium on
Conference_Location :
Austin, TX
Print_ISBN :
978-1-4244-7890-3
Electronic_ISBN :
978-1-4244-7891-0
DOI :
10.1109/ISIT.2010.5513476