Facsimile transmission over digital satellite land-mobile channels

Author

Dimolitsas, Spiros ; Rieser, Jack H. ; Ragland, Roderick J. ; Feldman, Howard ; Davis, Earl

Author_Institution

COMSAT Lab., Clarksburg, MD, USA

Volume

43

Issue

3

fYear

1994

fDate

8/1/1994 12:00:00 AM

Firstpage

617

Lastpage

625

Abstract

The importance of facsimile communication over public telephone networks is evidenced by the rapid growth in the number of Group 3 facsimile terminals. In this paper, the main characteristics of a real-time approach are described whereby facsimile signals are demodulated and their associated protocols are packetized and converted by a Facsimile Interface Unit (FIU) to a format suitable for transmission over digital land-mobile satellite channels. The FIU concept was developed to allow off-the-shelf facsimile terminals to be interconnected via the PSTN through satellite networks and to permit the provision of enhanced user services, such as facsimile broadcasting (point-to-multipoint) to mobile terminals, to be offered. In addition, the FIU concept is designed to mitigate for the longer access and transport link delays encountered in mobile satellite systems

Keywords

digital radio systems; facsimile; mobile radio systems; protocols; radiowave propagation; satellite relay systems; telephone networks; video signals; Group 3 facsimile terminals; PSTN; access delays; demodulation; digital satellite land-mobile channels; facsimile broadcasting; facsimile interface unit; facsimile signals; facsimile transmission; mobile terminals; protocols; public telephone networks; satellite networks; transport link delays; Bandwidth; Delay; Facsimile; GSM; Protocols; Real time systems; Satellite broadcasting; Telecommunication standards; Telecommunication traffic; Telephony;

fLanguage

English

Journal_Title

Vehicular Technology, IEEE Transactions on

Publisher

ieee

ISSN

0018-9545

Type

jour

DOI

10.1109/25.312813

Filename

312813