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Conference Paper
Enhanced Upstream Scheduling Algorithm for Variable Bit Rate VoIP Service over Hybrid Fiber Coaxial Network
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- Authors
- Seung-Eun Hong, Woo Yong Lee
- Issue Date
- 2008-04
- Citation
- International Symposium on Consumer Electronics (ISCE) 2008, pp.1-4
- Language
- English
- Type
- Conference Paper
- Project Code
- 08MR2600, Development of Multi-Gigabit Air Interface Technology, Lee Woo Yong
- Abstract
- In this paper, we enhance the existing upstream scheduling algorithm for VoIP service in data-over-cable system interface specification (DOCSIS) MAC protocol which is, called unsolicited grant service with activity detection (UGS-AD), not able to efficiently support various VoIP codecs with variable bit rate (VBR) and silence suppression over the shared medium hybridfiber-coaxial (HFC) network. We modify the UGS-AD to minimize a waste of uplink resources for supporting the VBR VoIP service. This proposed scheme is compared with the existing UGS-AD through the capacity analysis. Results show that our proposed algorithm can support more up to 59% voice users compared with the existing UGS-AD.
- KSP Keywords
- Activity Detection, Capacity analysis, Hybrid fiber, MAC protocol, Scheduling algorithm, System interface, Uplink resources, Variable-bit-rate(VBR), VoIP service, cable system, interface specification