Abstract
IEEE 802.16 Wireless Network technology is a hot research issue in recent years. It provides wider coverage of radio and higher speed wireless access, and Quality-of-Service plays an important part in the standard. For mobile multi-hop wireless network, IEEE 802.16j/MR network not only can supply large area wireless deployment, but also can provide high quality network service to mobile users. Although Mobile QoS supporting has been extensively investigated, Mobile QoS supporting in the IEEE 802.16-MR network is relatively unexplored. In this article, the probability of a mobile user who visits a Relay Station (RS) is known beforehand. With the visiting probability at each RS and the system specified size of the range for bandwidth allocation, Base Station (BS) can calculate the required bandwidth to meet the mobile user's demand and allocate appropriate bandwidth for a mobile user roaming in the range of the bandwidth allocation. The range of bandwidth allocation for mobile users is called the Zone in this article, which includes the user's current RS and the nearby RSs. The proposed scheme is therefore called Zone-based bandwidth management scheme. The simulation results demonstrate that Zone-based bandwidth management scheme can reduce QoS degradation and bandwidth re-allocation overhead.
Highlights
With the popularity of wireless environments in recent years, multimedia applications such as the IPTV and MOD are more and more attractive to the mobile host (MH) in the wireless networks like the IEEE 802.11 [1,2] wireless LAN (WLAN) and the third generation (3G) [3,4] HSDPA (3.5 G) [5] cellular phone system
There has been an increasing interest in QoS supporting for mobile users, which has been addressed in the literature for many years
As far as IEEE 802.16-MR network is concerned, we usually focus on the part of Micro-Mobility inside the IEEE 802.16-MR network domain
Summary
With the popularity of wireless environments in recent years, multimedia applications such as the IPTV and MOD are more and more attractive to the mobile host (MH) in the wireless networks like the IEEE 802.11 [1,2] wireless LAN (WLAN) and the third generation (3G) [3,4] HSDPA (3.5 G) [5] cellular phone system. For large area and high bandwidth wireless transmission service, Broadband Wireless Access (BWA) technology is aiming to provide an easy, timesaving, and low cost method for deployment of generation (beyond 4G) network infrastructure. In either case of WiMAX or Wi-Fi users, an appropriate bandwidth allocation scheme in the IEEE 802.16-MR network is expected in order to guarantee QoS transmission for mobile users. The bandwidth requirement of a mobile user at current RS is correlated with the bandwidth requirement at neighboring or nearby RSs. Secondly, the medium in the IEEE 802.16-MR is managed by the BS in a centralized control manner, which provides the feasibility of more sophisticated bandwidth management in the network. The proposed Zone-based bandwidth management scheme in the 802.16-MR network is presented in ‘Zone-based bandwidth management scheme’ section.
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