Wireless Networks - Special issue transmitter power control
Multiple working points in multichannel ALOHA with deadlines
Wireless Networks
Multiuser Detection
ALOHA packet system with and without slots and capture
ACM SIGCOMM Computer Communication Review
Wireless Networks - Special issue: Selected papers from ACM MobiCom 2003
Coding schemes for multislot messages in multichannel ALOHA with deadlines
IEEE Transactions on Wireless Communications
Fading channels: information-theoretic and communications aspects
IEEE Transactions on Information Theory
Judicious use of redundant transmissions in multichannel ALOHA networks with deadlines
IEEE Journal on Selected Areas in Communications
A Robust Coded MIMO FH-CDMA Transceiver for Mobile Ad Hoc Networks
IEEE Journal on Selected Areas in Communications
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We study multi-channel ALOHA networks (e.g., satellite-based networks) for online transaction processing, striving to maximize attainable throughput while meeting a deadline with near certainty. This captures the service provider's fixed costs and per-transaction revenue, the user's delay consciousness and ALOHA's probabilistic nature. Specifically, we consider CDMA channels and successive-decoding receivers. Interestingly, judicious use of power diversity is shown to be extremely effective: with a single transmission, capacity is doubled relative to that with power equalization. With the deadline permitting as few as one or two retransmission attempts upon failure, the probability of not meeting it can be virtually diminished (10驴5 and 10驴8, respectively) while approaching the throughput attainable without delay constraints. This also holds for limited mean transmission power. Thus, the effect of power diversity in conjunction with CDMA depends strongly on the type of receiver and on the exact performance measure, and the proposed approach is worth considering for next-generation systems.