Scheduling Algorithms for Multiprogramming in a Hard-Real-Time Environment
Journal of the ACM (JACM)
Wcdma for Umts
Channel allocation for GPRS with buffering mechanisms
Wireless Networks
Dynamic bandwidth allocation with fair scheduling for WCDMA systems
IEEE Wireless Communications
Modeling opportunity driven multiple access in UMTS
IEEE Transactions on Wireless Communications
Wireless dynamic channel assignment performance under packet data traffic
IEEE Journal on Selected Areas in Communications
Supporting rate guarantee and fair access for bursty data traffic in W-CDMA
IEEE Journal on Selected Areas in Communications
On Scheduling Policies for Streams of Structured Jobs
FORMATS '08 Proceedings of the 6th international conference on Formal Modeling and Analysis of Timed Systems
A novel prebuffering scheme for IPTV service
Computer Networks: The International Journal of Computer and Telecommunications Networking
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The Universal Mobile Telecommunications System (UMTS) adopts the WCDMA technology as the radio access interface to provide variable transmission rate services. There are four classes of connections identified in UMTS, which are the conversational, streaming, interactive, and background connections. To efficiently utilize radio bandwidth, the shared channel approach is proposed to deliver the packets for the interactive and background connections. This paper proposes a "Shared-Channel Assignment and Scheduling" (SCAS) algorithm to periodically allocate shared channels to serve interactive and background connections. We conduct formal mathematical proofs and simulation experiments to investigate the performance of the SCAS algorithm. We formally prove that with SCAS, a shared channel can be fully utilized (i.e., the utilization of a shared channel can be up to 100%) to serve the interactive connections. Our analysis indicates that compared with the previously proposed shared channel allocation and scheduling algorithms, there are less computation and communication overheads introduced in the SCAS algorithm. The results of the simulation experiments indicate that it is preferred to set up the Transmission Time Interval (TTI; that is, the unit of time interval for shared channel allocation) smaller to optimize the performance of the SCAS algorithm, including the shared channel utilization and the average waiting time of a connection before getting transmission service.