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Industrial wireless WIA-PA is the industrial wireless networking standard which is an emerging and used for process control. Real-time and reliable communication is the most important technical features of industrial wireless network. In this paper, through the analysis of the wireless network for industrial control and network architecture and protocols, combined with industrial wireless networks,...
Energy problem is very important for routing protocol in WIA-PA Networks since these nodes only rely on their limited battery supply in bad environment. It is not possible for people to replace batteries. So how to make well use of the limited power and delay the lifetime of the WIA-PA networks became the focus of the people. This paper introduces the WIA-PA criterion from the Wireless Industrial...
We study the delay and throughput in a wireless multihop network with sources that form a Poisson point process and relays which are placed equidistantly on the source-destination line. A combined TDMA/ALOHA MAC protocol with intra-route TDMA and inter-route ALOHA is employed. We give bounds on the delay-optimal number of hops and derive the asymptotic delay-throughput tradeoff as the source-destination...
Multi-channel wireless networks are increasingly being employed as infrastructure networks, e.g.\ in metro areas. Nodes in these networks frequently employ directional antennas to improve spatial throughput. In such networks, given a source and destination, it is of interest to compute an optimal path and channel assignment on every link in the path such that the path bandwidth is the same as that...
This paper deals with two fundamental joint routing and scheduling problems in multi-hop wireless mesh networks (WMNs) employing time division multiple access (TDMA). The problems pertain to incremental update of schedules as some of the existing flows terminate and new flow demands are received. In the first problem, referred to as single flow scheduling (SFS) problem, we are given a set of ongoing...
In this paper we present a novel technology named dynamic relay handover (DRH) for leveraging DSR and AODV for the benefit of providing a guaranteed network performance. The key points of DRH are the connectivity checking of the existing relay node and the assignment of a new relay node. In simulation of this algorithm based on OPNET Modeler 10.5, the effect of DRH on the network performance and the...
In wireless mesh networks (WMNs), TDMA based link schedulingcan allow multiple concurrent transmissions, resulting in throughput improvements. In this paper, we identify certain link characteristics which reduce achieved spatial reuse and increase schedule length. It is shown that certain links (called loners) based on their length and position, introduce inherent difficulty in scheduling them with...
Wireless interference can make a significant impact on the performance of a wireless network. The paper studies TDMA-based timeslot allocation to schedule links efficiently under RTS/CTS interference model of wireless networks, and presents an efficient centralized timeslot assignment algorithm. In addition, the paper presents an effective heuristic algorithm for calculating end-to-end bandwidth on...
In this paper, we address the routing and call scheduling problem in which one has to find a minimum-length schedule of selected links in a TDMA (time division multiple access) based wireless network. As we deal with multi-hop networks, these selected links represent a routing solution (paths) providing enough capacity to achieve the routers requirements of bandwidth. We present a cross-layer formulation...
Admission control is an essential part of a traffic management system. Overloading the network will only lead to congestion and performance degradations. The paper investigates how to design admission control in wireless TDMA-based multi-hop networks. Key components are the estimation of the available resources and how to coordinate the usage of these resources among the nodes. To increase robustness...
With the wide spread of broadband wireless communication devices such as wireless LAN and UWB, the wireless mesh network becomes common. As the mobile terminalpsilas ability is getting advance in recent time, wireless mesh network is expected to support QoS for the multimedia applicationpsilas traffic. in the QoS Routing technique using TDMA-based bandwidth reservation, each communication flow searches...
In this paper we study the problem of jointly controlling routing and transmission scheduling in spatial TDMA (STDMA)-based multihop wireless networks, with the goal of determining the minimum-length schedule that satisfies a given end-to-end traffic demand. We present a cross-layer formulation of the problem that incorporates multi-path routing at the network layer, while concurrently generating...
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