Adaptive power allocation with quality-of-service guarantee in cognitive radio networks
Computer Communications
Analysis of energy efficiency in fading channels under QoS constraints
IEEE Transactions on Wireless Communications
Quality-of-service in cognitive radio networks with collaborative sensing
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Video summary application over cross-layer designed wireless networks using multi-carrier CDMA
WSEAS TRANSACTIONS on COMMUNICATIONS
Power-efficient resource allocation with QoS guarantees for TDMA fading channels
Wireless Communications & Mobile Computing
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We propose a cross-layer approach to investigate the impact of physical-layer infrastructure on data-link-layer quality-of-service (QoS) performance over wireless links in mobile networks. At the physical layer, we take multiple-input-multiple-output (MIMO) diversity schemes as well as adaptive-modulation-and-coding (AMC) techniques into account. At the data-link layer, our focus is on how this physical-layer infrastructure influences the real-time multimedia delay-bound QoS performance. To achieve this goal, we first model the physical-layer service process as a finite-state Markov chain (FSMC). Based on this FSMC model, we then characterize the QoS performance at data-link-layer using the effective capacity approach, which turns out to be critically important for the statistical QoS guarantees over wireless links in mobile networks. We also investigate the impact of physical-layer power control and channel-state information (CSI) feedback delay on the QoS performance. The numerical results obtained demonstrate that our proposed cross-layer model can efficiently characterize the interactions between the physical-layer infrastructure and data-link-layer QoS performance.