Browse Conferences
The coexistence of WCDMA macrocell and microcell radio network layers
The introduction of a WCDMA microcell layer has implications upon inter-operator coexistence. Coexistence has been studied extensively throughout 3GPP standardisation to help ensure the appropriate specification of adjacent channel performa...
Theory and practice in 3G network planning
This paper discusses 3G network planning in a 3G network environment, and compares this to network planning for GSM. An overview of 3G network planning is then given. Network optimisation is discussed with a specific example of some work ca...
An automated UMTS site selection tool
Site selection was historically a manual task. This was possible and also efficient enough for GSM type services, as generally only coverage needed to be considered. In UMTS, many more criteria must be considered simultaneously, making the ...
Radio planning of third generation networks in urban areas
We examine some of the key issues facing radio network design engineers as they set about planning third generation networks in urban areas. 3G networks have one major difference compared with their second generation (2G) predecessors; they...
Roaming between satellite and terrestrial networks
The ETSI proposed S-UMTS system is intended to provide an important overlay to terrestrial 3rd generation networks. S-UMTS is specifically targeted at providing services in remote regions, or potentially just as important, when out of cover...
Comparing different cellular IP with Hawaii handoff schemes
The semi-soft handoff scheme for cellular IP is optimized for networks where the mobile host is able to listen/transmit to two or more base stations simultaneously for a short duration - the time that the mobile host spends in the overlap a...
Downlink soft handover gain in UMTS networks under different power control conditions
The downlink soft handover gain is analysed in UMTS networks under three different power control situations: without power control, with perfect power control and with imperfect power control. The results show that although power control in...
Calculation of soft handoff gain for UMTS
Defining "soft handoff gain" is not as trivial as one might think. One reason is because the soft handoff in the uplink direction is different from that in the downlink direction. Another reason is the vague context of this gain. Is it the ...
UTRA soft handover optimisation
The paper presents a comprehensive analysis of the UTRA (UMTS terrestrial radio access) soft handover performance optimisation based on computer simulations. A system level simulator based on wideband CDMA is applied in a typical UTRA vehic...
IP based services at the UMTS radio interface
The Universal Mobile Telecommunications System (UMTS) as a 3rd generation mobile telecommunications system is designed to provide mobile Internet access to the user. E-mail and World Wide Web (WWW) browsing sessions as mobile data service a...