Pre-emptive channel borrowing and traffic overflowing channel allocation scheme for multimedia overlay networks |
| |
Authors: | Fang-ming Zhao Juan Hang Di He |
| |
Institution: | [1]School of Electronic and Electronical Engineering, Shanghai Second Ploytechinc University, Shanghai 201209 [2]Practice Center, Shanghai Second Polytechnic University, Shanghai 201209, China [3]Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai 200240, China |
| |
Abstract: | This paper proposes a channel allocation scheme for multimedia wireless networks, in which a twolayer macro-cell or micro-cell
architecture is considered. Macro-cells are used to access high-mobility services; while micro-cells, which are overlaid by
the macro-cells, are used to cater low-mobility services. To analyze the scheme, a multidimensional Markov traffic model is
firstly developed, in which traffic characteristic of two special periods of time is considered. And then, a pre-emptive channel-borrowing
scheme combined with trafficoverflowing strategy for multimedia (voice, video or data) networks is proposed, in which handoff
requests can not only borrow channels from adjacent homogenous cells, but also be overflowed to heterogeneous cells. Priority
strategies are also dedicated to high-mobility services for they can pre-empt channels being used by low-mobility services
in macro-cells. To meet the high quality of service (QoS) requirements of video services and increase the channel utilization
ratio, video services can be transformed between real-time services and non-real-time services as necessary. Simulation results
show that our schemes can decrease the blocking probabilities and improve the channel utilization. |
| |
Keywords: | |
本文献已被 维普 SpringerLink 等数据库收录! |
|