Handover arrangement for a PCS network

Abstract

A handover is required in wireless personal communications systems when a portable moves from one base station coverage area to another during the course of a conversation. In general, the handover should be completed while the portable is in the overlap reglon to be successful This article considers several issues for handover management, handover detection, channel assignment, and radio link transfer. OERPEL, HUGHES NETWORK SYSTEMS ATIONAL CHIAO TUNG UNIVERSITY n a personal communications services (PCS) system, it is important to support services when a subscriber moves from the coverage area of one base station to that of another. This process is referred to as small-scale mobility management or handover management. To illustrate the handover behavior, let us consider an example in Fig. 1. This figure shows three radio base stations and their coverage areas (or cells). Even though cellular base station towers are shown, this discussion is general and applies to both high-tier cellular systems and low-tier pedestrian systems, and to both indoor and outdoor environments. A mobile phone or portable (represented by a vehicle in the figure) is shown traversing these areas. Coverage areas are irregular because of buildings, trees, mountains, and other terrain features, and sometimes they may considerably overlap. A handover is required in mobile or portable communications systems when a portable moves from one base station coverage area to another during the course of a conversation. In general, the handover should be completed while the portable is in the overlap region to be successful. As a portable Biographies ANTHONY NOERPEL'S

Systematic Tracking of the Random Movement of a Mobile in Cellular Mobile Network

“…The position obtained for any mobile host at any point of time is with respect to the origin of the cell it belongs. But, to find the interference it is necessary to find the distance of the interfering channels (i.e., the distance of the mobile stations using the same channel) in the first tire in case of FCA or in the reuse distance in case of DCA or HCA schemes [2,20,21]. So, we have to find the followings.…”

A multicriteria handoff decision scheme for the next generation tactical communications systems

“…Many handoff algorithms proposed in the literature are classified according to the metrics used to decide whether a handoff is necessary or not, where these metrics are monitored, and how these metrics are processed. Some of the metrics proposed are; signal strength [1], distance [2], signal to noise ratio [3], bit error rate [4], traffic load [5], word error indicator [6], quality indicator [6], and some combination of these [6,7]. Metrics can be measured and processed on the network entity or on the mobile.…”

An Analytical Approach for Performance Analysis of Handoffs in the Next Generation Integrated Cellular Networks and WLANs

“…Various channel assignment strategies such as fixed channel assignment (FCA), dynamic channel assignment (DCA) are available [3], [13], and FCA is assumed in this paper where the set of channels are permanently assigned to both base station and access point for cellular network and WLAN respectively [5], [6].…”