M. Frullone et al., INTERFERENCE ANALYSIS AND PLANNING REQUIREMENTS FOR DATA OVER VOICE IN CELLULAR-SYSTEMS, IEICE transactions on fundamentals of electronics, communications and computer science, E79A(7), 1996, pp. 968-974
Citations number
14
Categorie Soggetti
Engineering, Eletrical & Electronic","Computer Science Hardware & Architecture","Computer Science Information Systems
The paper deals with the evaluation of performance of current cellular
systems which are required to accommodate in an already operating sys
tem a wide range of new services, with different quality requirements
(on delays, retransmission rates, etc.), and often characterised by a
high burstiness (i.e. with relatively short traffic bursts, interleave
d by comparatively long silence periods). To this end, and extension o
f packet communications is appealing for its inherent flexibility: sta
ndardisation of packet protocols for data transmission over idle GSM c
hannels is in progress, and a similar service exploiting AMPS radio an
d network resources is already specified as Cellular Digital Packet Da
ta. In both cases voice traffic retains a higher priority. The paper f
ocuses on the evaluation of the effect of this additional traffic on e
xisting voice traffic in a GSM Phase 2+ system. Although voice calls e
xperience the same channel availability, their performance are worsene
d by the higher co-channel interference due to the higher average chan
nel occupancy. This impairment cannot be tackled, as a matter of cours
e, by increasing the re-use distance as this would affect the overall
system capacity. The paper suggests the use of smart planning strategi
es capable to ease control of interference levels with a negligible im
pact on system complexity and signalling load.