Comparison of TDMA versus CDMA for packet transmission schemes in circuit-mode

Author

Sant, Jeetendra ; Sharma, Vinod

Author_Institution

Dept. of Electr. Eng., Indian Inst. of Sci., Bangalore, India

Volume

6

fYear

1998

fDate

1998

Firstpage

3414

Abstract

We compare the performance of a TDMA multiple access scheme with a CDMA multiple access scheme when both are used for packet transmission in the circuit-mode. First we consider a more general model of slotted Aloha protocol on a channel with capture effect. Both TDMA and CDMA are shown to be special cases of this model. There are M<∞ users each with an infinite buffer. If in a slot, i packets are transmitted, then probability of a successful reception of a packet is qi. We state our results for this model and apply them to the special cases of TDMA and CDMA. We compare their stability regions, the rates of convergence to a stationary distribution and the delay moments. We find the range of the number of users and their arrival rates for which CDMA has higher throughput and lower delay moments as compared to the TDMA system

Keywords

access protocols; buffer storage; cellular radio; code division multiple access; convergence of numerical methods; delays; multiuser channels; packet switching; probability; queueing theory; stability; time division multiple access; CDMA; TDMA; arrival rates; capture effect; cellular radio; circuit-mode; convergence; delay moments; infinite buffer; multiple access schemes; packet transmission; queue length; slotted Aloha protocol; stability regions; stationary distribution; successful packet reception probability; throughput; Access protocols; Analytical models; Buffer storage; Circuits; Convergence; Delay effects; Multiaccess communication; Stability; Throughput; Time division multiple access;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 1998. GLOBECOM 1998. The Bridge to Global Integration. IEEE

Conference_Location

Sydney,NSW

Print_ISBN

0-7803-4984-9

Type

conf

DOI

10.1109/GLOCOM.1998.775836

Filename

775836