Abstract
Wireless mesh-networks that are based on Time Division Multiple Access (TDMA) are preferable from viewpoint of quality of service especially for delay sensitive-traffic such as voice and video. Since the mechanisms for the guaranteed quality service provision are not defined by standards, the mathematical dynamic model of the mesh-networks is offered in this paper. The model provides an optimal solution for joint routing and link resource allocation problem within the selected class of service. The model takes into account the user’s quality requirements, limited amount of link and buffer resources, the interference phenomenon and allows reusing slots on the link layer in order to improve effectiveness of network in general. Because time slot is unit of link layer resource the article introduces effect that order of allocated slots within the route has on end-to-end delay. It was shown that each slot reusing along a route causes endto- end delay growing in it. In this regard, the objective function of formulated optimization problem has been modified by the insertion of an additional component that is related to sequence order of slots along the path.
Highlights
IntroductionWireless networks are mobile (with mobile subscriber stations) or fixed networks (with fixed or low-mobile stations) which can work under two regimes, multipoint (Point-toMultipoint, PMP) mode and mesh-mode
Wireless networks are mobile or fixed networks which can work under two regimes, multipoint (Point-toMultipoint, PMP) mode and mesh-mode
As the analysis has shown, the insufficiently complete elucidation of the quality of service (QoS) problems in the standard has given rise to a great number of publications on the given theme
Summary
Wireless networks are mobile (with mobile subscriber stations) or fixed networks (with fixed or low-mobile stations) which can work under two regimes, multipoint (Point-toMultipoint, PMP) mode and mesh-mode. In the mesh-mode the stations of one network can interact with each other directly without involvement of the base station and perform the functions of routers. It has essential advantages, first of all, in efficiency of the channel resources use and area of coverage (service). On specifications of technological bases for wireless mesh networks (WMNs) within next-generation communications systems different standardization organizations are working including IEEE 802.11, IEEE 802.15, IEEE 802.16 groups [1]. Practical realization of TDMA-based wireless mesh-network is technology of wireless access WiMax (Worldwide Interoperability for Microwave Access), regulated by the IEEE standards of the 802.16 set [4]
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