| WIRELESS
FLEXIBLE PERSONALIZED COMMUNICATIONS |
COST
259 |
| Working Groups |
|
WG 3 - NETWORK ASPECTS
(Chairman: Dr. Th. Kuerner, E-Plus Mobilfunk, D)
This Group concentrates on the following topics:
Both in the evolving second generation (2G) systems and the new third generation (3G) systems radio network aspects are becoming more important in the planning process. Apart from the tasks coming from the introduction of new radio interfaces in 3G systems, additional challenges are introduced by capacity enhancement techniques like frequency hopping (FH) or adaptive antennas. More sophisticated hierarchical cellular architectures like intelligent-underlay-overlay techniques (IUO) are introduced even to the existing 2G systems. Today's mobile networks carry predominantly voice traffic. Future mobile networks will be operated in a multi-service environment carrying circuit-switched and packet-switched data with different transmission rates. The traffic characteristics of these services will be both inhomogeneous and asymmetric. The operators will only successfully exploit the full potential inherent to the new network features and fulfill the new service demands if a clear understanding of their implications in the planning process is reached and adequate planning and optimisation strategies are designed. Working Group 3 "Network Aspects" of COST 259 is focussing on the research and development of the corresponding algorithms, methods and strategies as indicated in task four and partly in task six of the MoU :
- spectrum efficiency
- compatibility (including frequency sharing with fixed services)
- channel allocation strategies (fixed and/or dynamic), best suited to
the network and the operating environment
- studies on efficient protocols for high data rates and for voice and
video integration (multimedia) with specific reference to the opportunities
offered by ATM access and IBC
- studies on the interconnecting potential and mutual relations between
radio and glass fibre networks
- distributed networks
- assessment of tools for cellular, micro- and pico-cellular coverage
taking into account that for future systems non-uniformity of traffic
distributions and traffic capacity considerations in most cases will impose
restrictions to cell planning more than propagation constraints themselves
- Network optimisation algorithms by minimisation of mutual interference
- Development of an advanced systematic planning method, capable of
coping with the various different network and environmental situations
