A cross-layer scheduling scheme for wireless multimedia transmissions with adaptive modulation and coding

Hui Chen, Chun Bun Henry Chan, Victor C M Leung

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

It is a big challenge to design an effective scheduling algorithm for multimedia transmissions over a wireless channel that employs adaptive modulation and coding (AMC). On one hand, the scheduling algorithm needs to schedule user transmissions by taking advantages of the channel diversity so that the overall system performance can be improved. On the other hand, the algorithm also needs to maintain fairness among users and to provide QoS guarantee based on user requirements. In this paper, we propose a novel scheduling algorithm called QoS-based cross-layer scheduling algorithm (QoS-CLS) to address the aforementioned issues. To maximize the system throughput, the algorithm takes into consideration both the physical layer and data link layer information to schedule user transmissions. Using the cross-layer information, the scheduling problem is formulated into a Markov Decision Process (MDP) and the optimum decision policy (based on the channel status, traffic state and buffer status of each traffic flow) is pre-calculated by linear programming and stored in the system for scheduling in real-time. Results show that QoS-CLS can greatly enhance the channel throughput compared to the opportunistic scheduling algorithm because of its cross-layer QoS consideration and the optimization method. Moreover, it can provide QoS guarantee and facilitate resource sharing among different traffic flows.
Original languageEnglish
Title of host publication5th International Conference on Broadband Communications, Networks, and Systems, BROADNETS 2008
Pages249-256
Number of pages8
DOIs
Publication statusPublished - 1 Dec 2008
Event5th International Conference on Broadband Communications, Networks, and Systems, BROADNETS 2008 - London, United Kingdom
Duration: 8 Sep 200811 Sep 2008

Conference

Conference5th International Conference on Broadband Communications, Networks, and Systems, BROADNETS 2008
CountryUnited Kingdom
CityLondon
Period8/09/0811/09/08

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Communication

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