Adaptive Soft-Handoff Thresholds for CDMA Systems with Spatial Traffic
نویسندگان
چکیده
In this paper we examine the interactions of the soft-handoff thresholds with the traffic load of a CDMA cell. We assume a user distribution following a spatial homogeneous Poisson process and determine the joint probability distribution for the radii of the two cells and the minimal overlapping area which will be interpreted as the area of soft-handoff. With these values, we can obtain the optimal soft-handoff thresholds obeying the fluctuations in cell radius for an expected target traffic and show the implications on CDMA coverage planning. Since soft-handoff regions are determined by the pilot signal level of the base station, we will only focus in our analysis on the forward link coverage areas.
منابع مشابه
Characterization of Soft Handoff in CDMA Systems
Many analytical approaches have been proposed for handoff analysis based on hard handoff in mobile communication systems. In code-division multiple-access (CDMA) systems with soft handoff, mobile stations (MS’s) within a soft-handoff region (SR) use multiple radio channels and receive their signals from multiple base stations (BS’s) simultaneously. Therefore, SR’s should be considered for hando...
متن کاملThe Evaluation and Performance Analysis for Soft Handoff in DMA Cellular Systems
The paper presents the analysis of integrated voice/data slotted code division multiple access (CDMA) system with soft handoff. Some important characteristics of the cellular configuration in soft handoff systems are used to propose a new design of an efficient call admission control (CAC) in CDMA systems. In particular, voice communications and data transmissions are considered. Voice terminal...
متن کاملThe Impact of Soft-handoff on the Downlink Capacity of Mobile Cdma Systems
The use of soft-handoff may have a substantial impact on the downlink of cellular CDMA systems, by reducing its capacity. This depends heavily on the parameters used in the handoff procedure. In this paper we estimate this impact with several sets of parameter values. We first derive an analytical solution for a general CDMA system. Then the IS-95 handoff procedure is simulated in order to esti...
متن کاملAdaptive channel reservation scheme for soft handoff in DS-CDMA cellular systems
Soft handoff techniques in direct-sequence code-division multiple-access (DS-CDMA) systems provide mobile calls with seamless connections between adjacent cells. Channel reservation schemes are used to give high priority to more important soft handoff attempts over new call attempts. However, since the number of soft handoff attempts varies according to environmental conditions, fixed reservati...
متن کاملSoft Handoff in Cdma Systems
This report analyzes the performance of a soft handoff algorithm of the type that has been proposed in the IS-95 CDMA standard. In the soft handoff scheme, multiple base stations are involved in the communication to and from one mobile station to improve the handoff performance on the boundaries between two base stations by providing channel diversity. On the other hand, there are additional re...
متن کامل