Incorporating retransmission diversity in quality-of-service guaranteed multi-user scheduling
- Resource Type
- Authors
- Xin Wang; I. Li; Di Wang; Salvatore D. Morgera; Hanqi Zhuang
- Source
- CISS
- Subject
- business.industry
Computer science
Automatic repeat request
Retransmission
ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS
Cross-layer optimization
Nakagami distribution
Link adaptation
Data_CODINGANDINFORMATIONTHEORY
Scheduling (computing)
Computer Science::Performance
Adaptive coding
Computer Science::Networking and Internet Architecture
Fading
business
Computer Science::Information Theory
Computer network
- Language
A cross-layer optimization combining retransmission diversity with multi-user diversity is investigated for wireless communications. To this end, a joint design of adaptive modulation and coding with retransmission-based automatic repeat request protocol is first outlined. This design is then employed to devise multi-user scheduling schemes which can optimally capture the available multiuser and retransmission diversities. In addition, the proposed on-line scheduling algorithms can operate even when the underlying fading channel distribution is unknown a priori, while asymptotically converging to the offline benchmark with guarantees on prescribed fairness and rate requirements. Numerical results are provided to verify the merits of our novel schemes for multi-user transmissions over Nakagami block fading channels.