Real-time communication in IEEE 802.11 networks: Timing analysis and a ring management scheme for the VTP-CSMA architecture

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2007

Autores

Ricardo Moraes (Autor) Outra; Paulo Portugal (Autor) FEUP; Stefano Vitturi (Autor) Outra; Francisco Vasques (Autor) FEUP; Pedro F. Souto (Autor) FEUP

Ata de Conferência Internacional

Título: Proceedings - Conference on Local Computer Networks, LCN

Páginas: 107-116

32nd IEEE Conference on Local Computer Networks, LCN 2007

Dublin, 15 October 2007 through 18 October 2007

Indexação

ISI Web of Knowledge

Scopus - 6 Citações

INSPEC

Outras Informações

ID Authenticus: P-007-MJV

DOI: 10.1109/LCN.2007.74

Abstract (EN): Keeping up with the timing constraints of real-time traffic in wireless environments is a hard task. One of the reasons is that the real-time stations have to share the same communication medium with stations that are out of the sphere-of-control of the real-time architecture. That is, with stations that generate timing unconstrained traffic. The VTP-CSMA architecture targets this problem in IEEE 802.11 wireless networks. It is based on a Virtual Token Passing procedure (VTP) that circulates a virtual token among real-time stations, enabling the coexistence of real-time and non real-time stations in a shared communication environment. The worst-case timing analysis of the VTP-CSMA mechanism shows that the token rotation time is upper-bounded, even when the communication medium is shared with timing unconstrained stations. Additionally, the simulation analysis shows that the token rotation mechanism behaves adequately, even in the presence of error-prone communication channels. Therefore, the VTP-CSMA architecture enables the support of real-time communication in shared communication environments, without the need to control the timing behavior of every communicating device. A ring management procedure for the VTP-CSMA architecture is also proposed, allowing real-time stations to adequately join/leave the virtual ring. This ring management procedure is mandatory for dynamic operating scenarios, such as those found in VoIP applications. © 2007 IEEE.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Notas: O DOI foi corrigido porque o anterior (10.1109/LCN.2007.136) não correspondia a este documento.

Nº de páginas: 10