Adaptive network support for mobile multimedia
MobiCom '95 Proceedings of the 1st annual international conference on Mobile computing and networking
Supporting mobile multimedia in integrated services networks
Wireless Networks - Special issue on wireless multimedia networking
Adaptive resource management algorithms for indoor mobile computing environments
Conference proceedings on Applications, technologies, architectures, and protocols for computer communications
A hybrid handover protocol for local area wireless ATM networks
Mobile Networks and Applications - Special issue on wireless ATM
Predictive and adaptive bandwidth reservation for hand-offs in QoS-sensitive cellular networks
Proceedings of the ACM SIGCOMM '98 conference on Applications, technologies, architectures, and protocols for computer communication
A dynamic bandwidth allocation algorithm for MPEG video sources in wireless networks
DIALM '99 Proceedings of the 3rd international workshop on Discrete algorithms and methods for mobile computing and communications
The Challenges of Mobile Computing
Computer
LCN '00 Proceedings of the 25th Annual IEEE Conference on Local Computer Networks
On Accommodating Mobile Hosts in an Integrated Services Packet Network
INFOCOM '97 Proceedings of the INFOCOM '97. Sixteenth Annual Joint Conference of the IEEE Computer and Communications Societies. Driving the Information Revolution
Quality of service guarantees in mobile computing
Computer Communications
Overview of wireless personal communications
IEEE Communications Magazine
Distributed call admission control in mobile/wireless networks
IEEE Journal on Selected Areas in Communications
An adaptive bandwidth reservation scheme for high-speed multimedia wireless networks
IEEE Journal on Selected Areas in Communications
Dynamic Two-Tier Cell Structure for Bandwidth Reservation of Handoffs in Cellular Networks
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
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One of the important issues in providing efficient multimedia traffic on a mobile computing environment is to guarantee the mobile host (client) with consistent QoS (Quality of Service). However, the QoS negotiated between the client and the network in one cell may not be honored due to client mobility, causing hand-offs between cells. In this paper, a call admission control mechanism is proposed to provide a consistent QoS guarantee for multimedia traffic on a mobile computing environment. Each cell can reserve fractional bandwidth for hand-off calls to its adjacent cells. It is important to determine the right amount of bandwidth reserved for hand-off calls because the blocking probability of new calls may increase if the amount of reserved bandwidth is more than necessary. An adaptive bandwidth reservation based on a mobility graph and a 2-tier cell structure is proposed to determine the amount of bandwidth to be reserved in the cell and to control dynamically its amount according to network conditions. We also propose a call admission control based on this bandwidth reservation and ``next-cell prediction'' scheme using a mobility graph. In order to evaluate the performance of our call admission control mechanism, we measure metrics such as blocking probability of new calls, dropping probability of hand-off calls, and bandwidth utilization. The simulation results show that the performance of our mechanism is superior to that of existing mechanisms such as NR-CAT2, FR-CAT2, and AR-CAT2.