Title :
Variable-rate for the basic speech service in UMTS
Author :
Berruto, Ermanno ; Sereno, Daniele
Author_Institution :
CSELT, Torino, Italy
Abstract :
A variable-rate approach for the user channel in a code division multiple access (CDMA)-based mobile system is proposed. The statistics of the different kinds of information to be transmitted, in the case of voice services, are discussed, together with the management of the variable-rate resulting channel. Possible alternatives are indicated, presenting the functions allocated to a variable-rate control unit. Some indications are given about contention problems, caused by simultaneous requests of high bit rates by both speech and signalling processes, thus exceeding the physical channel capacity
Keywords :
channel capacity; code division multiple access; personal communication networks; pseudonoise codes; speech coding; spread spectrum communication; telecommunication signalling; variable rate codes; CDMA; UMTS; code division multiple access; contention; physical channel capacity; signalling; speech; statistics; user channel; variable-rate control unit; voice services; 3G mobile communication; Bit rate; Channel capacity; Communication system control; Multiaccess communication; Signal processing; Speech processing; Statistics; Telecommunication control; Testing;
Conference_Titel :
Vehicular Technology Conference, 1993., 43rd IEEE
Conference_Location :
Secaucus, NJ
Print_ISBN :
0-7803-1267-8
DOI :
10.1109/VETEC.1993.507525
