Title :
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
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;
Conference_Titel :
Global Telecommunications Conference, 1998. GLOBECOM 1998. The Bridge to Global Integration. IEEE
Conference_Location :
Sydney,NSW
Print_ISBN :
0-7803-4984-9
DOI :
10.1109/GLOCOM.1998.775836
