The widespread use of networked environments and the recent availabilityof high network bandwidthshas rekindled interest in the area of automatic data refresh/update mechanisms. In many application areas, the updated information has a limited period of usefulness. Therefore, the development of systems and protocols that can handle such update tasks within predefined deadlines is required. In th...

This paper introduces a new technique for location management in cellular networks. It avoids the recording of moving tracks of mobile subscribers. The described procedures are derived from the well known untraceable MIX network and the distributed storage of location information according to GSM networks. 1 Terminology The served area of a cellular radio network is usually divided into locatio...

1 Authors’ queries p. 129, line 46 Update? p. 130, line 1 Identify Wh p. 130, line 40 Update? p. 133, line 49 Confirm spelling here and in refs. p. 136, line 42 Pls. clarify sentence p. 137, line 48 Update? p. 139, line 18 Update? p. 140, col. 2, line 7 Cite in text or delete here. In preparation? p. 140, col. 2, line 11 Publisher? p. 141, col. 1, line 4 Verify no. p. 142, col. 1, line 1 Confer...

A Mobile Node (MN) has to intimate to the Home Agent (HA) about its location to Correspondent Node (CN), using a Binding Update (BU) between HA and MN. During this exchange; an intruder may enter easily because of security lapses. Hence, a security mechanism is required to protect the BU. A new security system using hybrid cryptosystem is proposed for Binding Update (BU) in MIPv6.

The Group Method as identified in IS-41 standard was modified in this study to be dual group system to identify the optimal group size and to cope with the location tracking problem of the wireless system. The Group Method can effectively reduce the loading of the network caused by tracking mobile users in a mobile cellular system because it joins several cells to form a group. Instead of perfo...

In mobile systems, the influence of mobility on the network performance must be strengthened, mainly due to the huge number of mobile users and the small of cells. This paper presents a profile-based strategy combined with a built-in memory method to reduce the signaling cost during the location update processes by increasing the intelligence of the location procedure. This strategy associates ...

Localization is one of the more important tasks in Wireless Sensor Networks. The accurate location information could greatly improve the performance of tasks such as routing, energy conservation, data aggregation and maintaining network security. Here, we have proposed an Efficient Location Optimized Energy Routing (ELOER) approach which attains to make a balance between network life times, loc...

Location management is one of the fundamental issues in cellular networks. It includes two operations: location update and paging. The goal of location management is to minimize the combined cost of these two operations. Recently a distance-based scheme using a pre-defined look-up table for location updates has been proposed. The table describes the relationship between the distance and the tim...

This paper proposes an efficient multicast search scheme based on bipartite graph matching model, aiming at one of the most important problems in the multicast service, how can the wireless network track and locate the mobile uses in the idle state, under the tight bandwidth and delay constraints,. By quantifying the location uncertainty of mobile users with Shannon's entropy, the scheme adopts...

Cellular telephony systems, where locations of a mobile users may be unknown at some times, are becoming more common. Mobile users are roaming in a zone and reports its location only if it leaves the zone entirely. Due to search bandwidth, delay constraints and very often the potential locations of different users overlap, the problem of a concurrent search for many users is different from the ...