Packet communications on a mobile radio channel
Document Type
Article
Publication Date
1-1-1986
Abstract
This report has explored the possibility of transmitting packetized data over a Rayleigh fading channel. The random errors due to the FM channel impairments have been ignored, and only burst errors that characterize the fading channel are considered. The protocol simulated is the widely used HDLC protocol which requires a frame to be retransmitted only when the remote end has detected errors in the received frame. Packets are sufficiently short so that most of them fall in the interfade time intervals. This leads to a high transmission efficiency. It is shown that the delay and throughput depend on the fade statistics. Also, for a given vehicle speed, they both improve monotonically as the packet size decreases. However, a smaller packet size increases the overhead fraction of the packet and thus reduces the effective throughput. Furthermore, there is a range of values of the packet size over which the delay is small and the efficiency high.
Keywords
Mathematical techniques - transfer functions, Radio telephone - noise, Radio transmission - fading, Cellular mobile phones, Link level protocol, Mobile radio channel, Packet communications, Signal-to-noise ratio (snr), Radio systems, mobile
Divisions
fac_eng
Publication Title
AT&T Technical Journal
Volume
65
Issue
3
Additional Information
Cited By (since 1996):2 Export Date: 16 December 2013 Source: Scopus CODEN: ATJOE Language of Original Document: English Correspondence Address: Karim, M.R.; AT&T, Holmdel, NJ, USA, AT&T, Holmdel, NJ, USA