Résumé: Quality-of-Service (QoS) performance and connection admission control (CAC) for heterogeneous services in wireless multiple access networks are investigated. The heterogeneous services include constant bit rate (CBR), variable bit rate (VBR) and available bit rate (ABR) services. Multiple access control is handled by a polling-based scheme with non-preemptive priority. Tight delay variation (jitter) bounds for CBR connections and delay bounds for VBR connections are derived. A CAC scheme based on the derived bounds is developed. The CAC makes use of user mobility information to reserve an appropriate amount of system resources for potential handoff connections to achieve low handoff connection dropping rate (HCDR). Simulation results show that the proposed CAC scheme can achieve both low HCDR and high resource utilization.

Langue: Anglais
Index décimal 621.385 .Téléphonie (centraux, réseaux téléphoniques ; systèmes téléphoniques par câbles, fibres optiques, fils, lasers ; téléphonie Internet )
Thème Informatique

Mots clés:
Commande d'admission de raccordement
Réseaux cellulaires