Phil Holifield
University of Central Lancashire
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Publication
Featured researches published by Phil Holifield.
Broadband Networks: Strategies and Technologies | 1995
Phil Holifield; Trevor J. Terrell; Philip Mars
With the emergence of Broadband ISDN and the adoption of ATM as its transport mechanism there is a growing interest in slotted ring networks both for high speed packet switching and for multimedia LAN applications. This paper describes a slotted ring testbed which uses a modified Orwell protocol for media access, and which has enabled a study of the modified Orwell protocol under symmetrical and asymmetrical traffic flow distributions. The architecture of the slotted ring testbed is outlined, and analytical models for the protocol are presented for different traffic flow distributions. The analytical results are compared to experimental results obtained from the testbed. The suitability of the reset rate as an indicator of available bandwidth in an access control mechanism is considered, and it is shown that for constant traffic flow and traffic statistics the reset rate works well as an indicator of potential network congestion. Under changing traffic distributions and traffic arrival statistics, additional indicators of congestion are required. On-going work into access control for the test-bed in a integrated services environment is outlined.
Research in Learning Technology | 2004
Gavin Sim; Phil Holifield; Martin Brown
Archive | 2004
Gavin Sim; Phil Holifield
EdMedia: World Conference on Educational Media and Technology | 2004
Gavin Sim; Phil Holifield
Archive | 2008
Gavin Sim; Janet C. Read; Phil Holifield
EdMedia: World Conference on Educational Media and Technology | 2006
Gavin Sim; Janet C. Read; Phil Holifield
EdMedia: World Conference on Educational Media and Technology | 2007
Gavin Sim; Janet C. Read; Phil Holifield; Martin Brown
Archive | 2006
Gavin Sim; Janet C. Read; Phil Holifield
Archive | 2005
Gavin Sim; Stephanie Strong; Phil Holifield
EdMedia: World Conference on Educational Media and Technology | 2005
Phil Holifield; Guy Heatley