Title :
A spectrally efficient narrowband mobile radio system for voice and data communication
Author :
Stern, Harold P.
Author_Institution :
Dept. of Electr. Eng., Alabama Univ., Tuscaloosa, AL, USA
Abstract :
Private land mobile communications has experienced significant demand for increased capacity and for new services, but congestion within the currently allocated 450 and 800 MHz bands has severely limited the capability of present-generation systems to meet this demand. This paper proposes a narrowband integrated voice/data mobile radio system which triples current voice traffic capacity and simultaneously provides capacity for mobile data communications such as mobile data terminals, automatic vehicle location, and mobile facsimile by utilizing the silence gaps inherent in speech. The system is designed to fit within the narrowband 25 kHz channels in the 450 and 800 MHz frequency bands and thus the system can replace existing private land mobile radio systems with minimum impact. The centerpiece of the system design is an evolutionary switching technique known as packetized data, voice dedicated (PDVD) burst switching which allows transmission of data within the silence gaps inherent in speech. Simulation results for various voice and data traffic loads show the flexibility and efficiency of the proposed narrowband integrated voice/data mobile radio system
Keywords :
data communication systems; facsimile; mobile radio systems; packet switching; telecommunication traffic; voice communication; 25 kHz; 450 MHz; 900 MHz; UHF; automatic vehicle location; data traffic; frequency bands; integrated voice/data system; mobile data communications; mobile data terminals; mobile facsimile; narrowband channels; narrowband mobile radio system; packetized data; private land mobile communications; simulation results; voice communication; voice dedicated burst switching; voice traffic capacity; Burst switching; Data communication; Facsimile; Frequency; Land mobile radio; Mobile communication; Narrowband; Packet switching; Speech; Vehicles;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 1992. Proceedings, PIMRC '92., Third IEEE International Symposium on
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-0841-7
DOI :
10.1109/PIMRC.1992.279875
