Title :
Performance analysis of voice services in hybrid fiber/coax networks
Author :
Xiao, Xiaojun ; Chew, Yong Huat ; Seah, Winston K G ; Ko, Chi Chung
Author_Institution :
Dept. of Electr. Eng., Nat. Univ. of Singapore, Singapore
Abstract :
This paper investigates quality-of-service (QoS) performance of voice services in hybrid fiber/coax (HFC) networks. We focus on the upstream channel and the performance of the system is evaluated in terms of voice packet loss probability. Two different classes of voice services are considered. For voice without speech activity detector (SAD), there is no packet dropping and hence the analysis is trivial. For voice with SAD, we develop an elaborate discrete-time Markov chain model to obtain the voice packet dropping probability. We also describe the voice traffic models and the performance measures, and include an overview of the media access (MAC) protocol. Numerical examples are presented to demonstrate the performance the system
Keywords :
Markov processes; access protocols; hybrid fibre coax networks; packet switching; probability; quality of service; telecommunication traffic; voice communication; HFC networks; MAC protocol; QoS performance; discrete-time Markov chain model; hybrid fiber/coax networks; media access protocol; performance measures; quality-of-service; speech activity detector; system performance analysis; upstream channel; voice packet dropping probability; voice packet loss probability; voice services; voice traffic models; Coaxial components; Detectors; Hybrid fiber coaxial cables; Intelligent networks; Media Access Protocol; Optical fiber communication; Performance analysis; Quality of service; Scheduling algorithm; Speech analysis;
Conference_Titel :
Communications, 2001. ICC 2001. IEEE International Conference on
Conference_Location :
Helsinki
Print_ISBN :
0-7803-7097-1
DOI :
10.1109/ICC.2001.937330
