Estimating the Position of Mobiles by Multi-Criteria Decision Making

Abstract

In this study, we propose a novel mobile tracking method based on Multi‐Criteria Decision Making (MCDM), in which uncertain parameters—the received signal strength, the distance between the mobile and the base station, the moving direction, and the previous location—are used in the decision process using the aggregation function in the fuzzy set theory. Through numerical results, we show that our proposed mobile tracking method provides a better performance than the conventional method using the received signal strength.

Location and Direction Estimation-Based Resource Reservation Scheme for the Handoff in Micro Cellular Multimedia Networks

“…The membership function of the distance l R ðD i Þ is given by Eq. (2), where D i is the distance between the BS i and the MT [13]. Also, d 1 is the upper limit, and d 2 is the lower limit.…”

“…The estimator estimates a sector in the sector estimation step, a zone in the zone estimation step and a block in the block estimation respectively and then finally computes MT's direction using the vector information between the estimated location and the previous one. In order to indicate the location of each block within a cell, we use the vector data which is obtained by converting the rectangular coordinate of the block to the polar coordinate with the origin of the BS [13] as shown in Fig. 2.…”

“…To enhance estimation accuracy, our proposed scheme is based on fuzzy multi-criteria decision making (FMCDM) which considers multiple parameters: the signal strength, the distance between the BS and MTs, the moving direction, and the previous location. This process is based on three step location estimations which can determine MT's position by gradually reducing the area of the MT's location [13,14].…”

A Noble Fuzzy-based Mobile Tracking Scheme

“…The membership function of the moving direction ) ( i R C μ is given by (5). i C is a scalar value defined by the moving direction of the MT, 4 1 H , , H L means the previous directions and used for determining the membership degree of estimated moving direction.…”

“…There will be a strong need for the mobile terminal tracking in the next generation mobile communication systems [1][2][3][4][5]. The location of a Mobile Terminal must be found out, e.g., in wireless emergency calls already in the near future.…”