Admission control and adaptive CDMA for integrated voice and data systems

Author

Tang, Xiaoyi ; Goldsmith, Andrea

Author_Institution

California Univ., Berkeley, CA, USA

Volume

1

fYear

2001

fDate

2001

Firstpage

506

Abstract

We propose a new direct-sequence code division multiple access (DS-CDMA) strategy for combining voice and variable-rate data. Our admission control policy uses a reservation policy for voice calls and different variable-rate schemes for data to maximize throughput on the residual bandwidth unused by voice. The data schemes we consider include variable bit rate (VBR), multicode (MC), and variable constellation size (VCS). We determine the voice call blocking probability and the data throughput for each of the variable-rate schemes. We find that VBR outperforms MC and VCS in terms of data throughput. We also calculate the improvement to system performance obtained by exploiting voice activity detection

Keywords

adaptive signal detection; code division multiple access; integrated voice/data communication; optimisation; probability; spread spectrum communication; telecommunication congestion control; telecommunication traffic; variable rate codes; DS-CDMA; MC communication; VBR; VCS communication; adaptive CDMA; admission control; data communication; direct-sequence code division multiple access; multicode communication; reservation policy; system performance; throughput maximization; variable bit rate; variable constellation size communication; voice activity detection; voice call blocking probability; voice data integration; wireless networks; Adaptive control; Admission control; Bandwidth; Bit error rate; Data systems; Delay effects; Interference; Multiaccess communication; Programmable control; Throughput;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd

Conference_Location

Rhodes

ISSN

1090-3038

Print_ISBN

0-7803-6728-6

Type

conf

DOI

10.1109/VETECS.2001.944894

Filename

944894