Wireless mesh network

About: Wireless mesh network is a research topic. Over the lifetime, 13600 publications have been published within this topic receiving 221035 citations. The topic is also known as: WMN.

Routing protocol enhancement for handling node mobility in wireless sensor networks

Abstract: In wireless sensor networks, the routing algorithms currently available assume that the sensor nodes are stationary Therefore when mobility modulation is applied to the wireless sensor networks, most of the current routing algorithms suffer from performance degradation The path breaks in mobile wireless networks are due to the movement of mobile nodes, node failure, channel fading and shadowing It is desirable to deal with dynamic topology changes with optimal effort in terms of resource and channel utilization As the nodes in wireless sensor medium make use of wireless broadcast to communicate, it is possible to make use of neighboring node information to recover from path failure Cooperation among the neighboring nodes plays an important role in the context of routing among the mobile nodes This paper proposes an enhancement to an existing protocol for accommodating node mobility through neighboring node information while keeping the utilization of resources to a minimum

Distributed medium access protocol for wireless mesh networks

Abstract: This invention defines a medium access protocol for the support of mesh networking in wireless communications It defines a phase for intra-cell and a phase for inter-cell traffic During the inter-cell traffic a beacon phase is used for the reservation of transmissions In this phase also information about the mesh topology is included and parallel transmission are supported Even though this medium access protocol is intended to be proposed in standardization of IEEE 80211 mesh networks (80211) it could be used in any wireless mesh network

MEMO: An Applied Wireless Mesh Network with Client Support and Mobility Management

Abstract: In this paper, we design and implement an applied wireless mesh network named MEMO with transparent client access support and mobile node mobility management. Unlike traditional design, our proposed solution is based on MAC layer triggered mechanism and special routing scheme called AODV_MEMO which combines routing and mobility management into a single solution. The advantages of AODV-MEMO solution include: (1) no modification is required on mobile nodes; (2) mobility management is accomplished in distributed way, no central location server is needed; (3) cross- layer interaction between MAC and Routing Layer effectively reduces the handover time of mobile nodes roaming. In addition, an effective gateway function has been implemented based on the AODV-MEMO routing. Real test-bed experiment proves our design is feasible and efficient.

Minimum Latency Broadcasting in Multiradio, Multichannel, Multirate Wireless Meshes

Abstract: This paper addresses the problem of "efficientrdquo broadcast in a multiradio, multichannel, multirate wireless mesh network (MR2-MC WMN). In such an MR2-MC WMN, nodes are equipped with multiple radio interfaces, tuned to orthogonal channels, that can dynamically adjust their transmission rate by choosing a modulation scheme appropriate for the channel conditions. We choose "broadcast latency,rdquo defined as the maximum delay between a packet's network-wide broadcast at the source and its eventual reception at all network nodes, as the ldquoefficiencyrdquo metric of broadcast performance. We study in this paper how the availability of multirate transmission capability and multiple radio interfaces tuned to orthogonal channels in MR2-MC WMN nodes can be exploited, in addition to the medium's ldquowireless broadcast advantagerdquo (WBA), to improve the ldquobroadcast latencyrdquo performance. In this paper, we present four heuristic solutions to our considered problem. We present detailed simulation results for these algorithms for an idealized scheduler, as well as for a practical 802.11-based scheduler. We also study the effect of channel assignment on broadcast performance and show that channel assignment can affect the broadcast performance substantially. More importantly, we show that a channel assignment that performs well for unicast does not necessarily perform well for broadcast/multicast.

RF based positioning and intrusion detection using a wireless sensor network

Abstract: A wireless sensor system includes an array of wireless nodes, each wireless node including a wireless transceiver transmitting over the radio frequency (RF) and a processor. The array of wireless nodes is distributed over an area. In operation, the array of wireless node determines the presence of an object within the area by measuring the RF power between a neighboring pair of wireless nodes. In one embodiment, an object is present in the area when the RF power between a first wireless node and a second neighboring wireless node is less than a predetermined value.