Load analysis of the soft handoff scheme in a CDMA cellular system

Author

Tcha, Dong-wan ; Kang, Suk-yon ; Jin, Go-Whan

Author_Institution

Graduate Sch. of Manage., Korea Adv. Inst. of Sci. & Technol., Seoul, South Korea

Volume

19

Issue

6

fYear

2001

fDate

6/1/2001 12:00:00 AM

Firstpage

1147

Lastpage

1152

Abstract

In a code-division multiple-access cellular system, the soft handoff with macrodiversity is known to increase the number of available channels in each cell from the interference-reduced radio environment. This capability, however, also incurs extra load on the system due to the increase in the number of channels occupied and reserved for macrodiversity. The objective is to evaluate the associated loads, thereby enabling effective channel management. We first differentiate two kinds of loads attributable to new and handoff calls, respectively. Further dividing handoff calls into two kinds, we derive a load balance equation from which three different loads at a cell are all exactly obtained in association with the size of the soft handoff region. Comparative analysis with the case of no soft handoff region, i.e., of hard handoff, shows the appropriate proportion of channels reserved for the macrodiversity in a given soft handoff region

Keywords

cellular radio; code division multiple access; diversity reception; multiuser channels; radiofrequency interference; CDMA cellular system; channel management; channel reservation; code division multiple access; handoff calls; hard handoff; interference-reduced radio environment; load analysis; load balance equation; macrodiversity; new calls; soft handoff region size; Availability; Base stations; Differential equations; Electromagnetic interference; Multiaccess communication; Multiple access interference; Technology management; Telecommunications; Traffic control;

fLanguage

English

Journal_Title

Selected Areas in Communications, IEEE Journal on

Publisher

ieee

ISSN

0733-8716

Type

jour

DOI

10.1109/49.926370

Filename

926370