Transparent and Distributed Localization of Mobile Users in Wireless Mesh Networks (original) (raw)
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Wireless Mesh Networks, 2011
Wireless mesh networks (WMNs) have recently received much attention not only from the research community, but also from municipalities or non-tech-savvy user communities willing to build their own all-wireless network. One of the factors that has helped in making WMNs become popular is the widespread availability of low-cost wireless equipment, and particularly, IEEE 802.11 WLAN equipment. However, making these WMNs operationally efficient is a challenging task. In this direction, there has been a lot of work on the research issues highlighted in (Akyildiz & Wang, 2005). Nevertheless, such research topic as mobility management did not receive as much attention as others (e.g., channel assignment or routing). In general, mobility management is split into two main functions, namely handoff management and location management. The former deals with maintaining the communication of the mobile node (MN) while (re-)attaching to a new attachment point, whilst the latter deals with locating the MN in the network when a new communication needs to be established. Related to mobility, and at an architectural level, a common belief in the research community is that, unlike in an IP context, node identifiers and addresses (i.e., the current location in the network of those nodes) should not be integrated into a single identifier. The main purpose of this is to enable designing efficient mobility management schemes, and as part of them, efficient location management schemes (location services). This is particularly challenging in large-scale WMNs, due to the state information that must be stored in the nodes and the associated control overhead sent through the network. Related to this, position-based (geographic) routing algorithms are expected to improve scalability of large 1 Based on "VIMLOC location management in wireless meshes: Experimental performance evaluation and comparison", by Mangues-Bafalluy et al., which appeared in Proc. ICC
Enhanced mobility management in wireless mesh networks
2008
Despite considerable efforts, mobility management in Wireless Mesh Networks (WMN) remains an open issue. Several high performance solutions can be found in the literature, however, they all have the same requirement that refrains them from being widely adopted: they need either modifications or additional modules into the protocol stack of users' equipment. In this paper, we investigate the mobility problem in WMNs and propose a new efficient solution, which does not rely on any modification or additional software on the client side, thus being totally transparent for end-users. In our analysis, we first show the measurements performed on the existing WMN deployed in LIP6, namely MeshDVNet, and highlight the reasons of its poor performance. Then, we describe the design of Enhanced Mobility Management (EMM), our proposal, which does not need any supplementary installation. EMM takes advantage of the existing Neighbor Discovery Protocol (NDP) cache to keep a track of the last client association and uses this information to trigger an update in order to re-route packets. The measurements we performed show how EMM is able to greatly improve performances.
A strategy for mesh client mobility support in wireless mesh networks
2012 Third International Conference on Networking and Distributed Computing, 2012
Mesh Client (MC) may be frequently move from the current SMAP to another SMAP in the Wireless Mesh Networks (WMN). The most of the present research papers on WMN assume that the MC is static or quasi static. However, MC may constantly move actually, which connection interruption and packet loss may occur. To solve these problems this paper presents a mobility support strategy for WMN, which consists of two parts: address assignment and mobility management.
… , 2009. ICACT 2009. …, 2009
After the great deployment and success of the Wireless Local Area Networks based on access points, which communicate by using wired links, the wireless world saw the birth of new technologies like Ad Hoc networks and Wireless Mesh Networks (WMN), which permit the flexibility, easy deployment and low cost. The first objective of these networks is to offer a seamless connectivity to mobile users. Nevertheless, wired mobility management protocols perform poorly with these new technologies. In fact, traditional protocols do not permit to have a realistic snapshot of the network; moreover, we need to propose new approaches to detect clients' movements. In this paper, we investigate mobility problems in WMN and propose a new efficient solution with high performances. Specifically, we present a new mobility management scheme for WMNs, 3-layer mobility management scheme. It utilizes some WMN's features and uses IP Prefix in mobility management to reduce the signaling cost as well as to shorten the handoff latency. Our analysis shows that significant benefits can be achieved from this scheme. We provide the following contributions. First, we talk about some routing protocols at layer 3. After that we propose a 3layer mobility management scheme in order to reduce the signaling cost and shorten the handoff latency. We focus on our experiment in using IP Prefix in detecting client movement.
IJERT-A Survey On Recent Research Based On Location Management In Cellular Networks
International Journal of Engineering Research and Technology (IJERT), 2013
https://www.ijert.org/a-survey-on-recent-research-based-on-location-management-in-cellular-networks https://www.ijert.org/research/a-survey-on-recent-research-based-on-location-management-in-cellular-networks-IJERTV2IS70160.pdf It has been known for over one hundred years that radio can be used to keep in touch with people on the move. However, wireless communications using radio were not popular until Bell Laboratories developed the cellular concept to reuse the radio frequency in the 1960s and 1970s. Over the past few years, wireless mesh networks (WMN) are gaining growing interest. This trend follows the popular needs for the inexpensive, continuous wireless wide-area coverage. A seamless wireless access is a common goal of the future communication. Current deployment of the wireless mesh networks (WMN) necessitates mobility management to support mobile clients roaming around the network without service interruption. The purpose of this paper is to survey recent research on location management in cellular networks and study major challenges to maintain service continuity based on the system model and also identify location management schemes used to access data in Wireless Mesh Networks.
Mobile Networks and Applications, 2018
A Wireless Mesh Network (WMN) can provide Internet connectivity to end users through heterogenous access network technologies. However, the mobility of mobile nodes across these access networks in WMNs results in service disruption. Existing mobility management protocols are designed for single hop networks and are centralized in nature. A Distributed IP-based Mobility Management Protocol (DIMMP) is proposed in this paper that provides seamless mobility with service continuation for mobile nodes when they roam across WMNs. Instead of relying on a centralized mobility anchor, the mobility functionality is distributed at multiple nodes in the WMN, in order to reduce the chances of potential single point of failure. The proposed protocol manages both types of mobilities i.e. intra-WMN and inter-WMN and uses a new enhanced route optimization procedure. Simulation results show that this work has contributed by improving the performance of handoff procedure with respect to handoff latency, packet loss and signalling overhead, as compared to the existing protocols.
Performance of a distributed location management scheme for wireless networks
GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489), 2003
Location management schemes continue to be a topic of major research. Especially with the upcoming 3G, 4G and wireless LAN technologies, which will bring better services to the mobile users, it is anticipated that the mobile user population would continue to increase. Location management schemes comprise of location update and paging procedures. Efforts to introduce an efficient location update scheme results in increased costs in paging and vice-versa. In this work we propose a simple Base Station controller based Location Area and paging control, which optimizes the total location management costs and is very simple to implement. This scheme has been evaluated using a mobility model, which has features to study location update rates. These results are compared with some of the more popular dynamic Location Area schemes. Preliminary comparison results show that the proposed scheme is optimal, when considering network architecture and total costs.
An architecture for seamless mobility in spontaneous wireless mesh networks
Proceedings of the 2nd ACM/IEEE international workshop on mobility in the evolving internet architecture, MobiArch’07, 2007
In this paper, we consider spontaneous wireless mesh networks that can provide wide coverage connectivity to mobile nodes. Our mobility scheme builds upon separation between a persistent node identifier and its current address. When joining the mesh, a mobile node associates with a mesh router that updates a location service managed in the mesh as a distributed hash table. Mobility implies changing addresses while a node moves in the mesh. To keep the rate of location updates and correspondent node notifications low, the address of the new mesh router with which the mobile node is associated needs to be topologically close to the previous one. Thus, such a mobility scheme requires an addressing space with specific properties. We achieve this by defining an algorithm for constructing a pseudo-geographical addressing space: a few nodes know their exact locations and others estimate their relative positions to form a topologically consistent addressing space. Such an addressing space also enables scalable and low overhead routing in the wireless mesh---we propose a trajectory based long distance ballistic geographical routing.
LORD: Tracking mobile clients in a real mesh
Ad Hoc Networks, 2011
Localizing a mobile client in a Wireless mesh network (WMN) consists in finding the router this client is attached to. Intuitively, the simplest manner to perform this task is to flood the whole network asking for the location of this client. Flooding the network is good for reliability but leads to increased latency and broadcast storm problems, affecting the efficiency