P-CAS: A Priority-Based Channel Assignment Scheme over Multi-Channel Cable Network for UGS Service Provisioning

Kuo-Chih Chu; Wei-Tsong Lee; Chin-Ping Tan

doi:10.6180/jase.2007.10.4.06

P-CAS: A Priority-Based Channel Assignment Scheme over Multi-Channel Cable Network for UGS Service Provisioning

Kuo-Chih Chu This email address is being protected from spambots. You need JavaScript enabled to view it.¹, Wei-Tsong Lee² and Chin-Ping Tan³

¹Department of Electronic Engineering, Lunghwa University of Science and Technology, Taoyuan, Taiwan 333, R.O.C.
²Department of Electrical Engineering, Tamkang University, Tamsui, Taiwan 251, R.O.C.
³Askey Computer Corporation, Taipei, Taiwan, R.O.C.

Received: June 28, 2006
Accepted: October 3, 2006
Publication Date: December 1, 2007

Download Citation: ||https://doi.org/10.6180/jase.2007.10.4.06

ABSTRACT

Currently, the most popular standard adopted in cable network is the Data-Over-Cable Service Interface Specifications (DOCSIS) protocol. For supporting emerging multimedia applications, several QoS mechanisms and service types were defined in DOCSIS. DOCSIS, however, did not specify how to schedule these QoS-enabled traffics and thus this paper tries to offer a priority-based scheduling scheme with dynamic channel assignment to support the Unsolicited Grant Service (UGS). By considering the tolerated jitter and throughput of each request, we defined certain priority equations and channel assignment rules for the service scheduling. According to simulation results, our solution, named Priority-based Channel Assignment Scheme (P-CAS), provides decent service delivery rate, channel utilization ratio, channel load balance, and fair bandwidth utilization.

Keywords: Data-Over-Cable Service Interface Specifications (DOCSIS), Hybrid Fiber Coaxial (HFC), Cable Network, Quality of Service (QoS)

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