Quality of Service Issues in Multi-service Wireless Internet Links

  • Authors:
  • George Xylomenos;George C. Polyzos

  • Affiliations:
  • -;-

  • Venue:
  • QoS-IP '01 Proceedings of the International Workshop on Quality of Service in Multiservice IP Networks
  • Year:
  • 2001

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Abstract

Internet application performance over wireless links is disappointing, due to wireless impairments and their adverse interactions with higher protocol layers. In order to effectively address these problems without the need for global protocol upgrades, we focus on linkl ayer enhancement schemes. Simulations reveal that different schemes work best for different applications. We have thus developed a multi-service linkl ayer architecture that can simultaneously enhance the performance of diverse applications by supporting multiple linkmec hanisms concurrently. Simulations confirm that this architecture provides dramatic performance improvements. The architecture can be embedded in various ways into the Internet. A critical issue for Quality of Service support over wireless links is the unpredictability of available resources. Our approach is based on fair sharing of the linkb efore any measures are taken to improve the performance of individual traffic classes. This approach turns over the error control trade-off to the applications themselves.