Network controlled adaptive antenna tilting in multi-band UMTS FDD

• Published in: 2004 IEEE 15th International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE Cat. No.04TH8754) Vol. 4; pp. 2762 - 2766 Vol.4
• Main Authors: Abou-Jaoude, R., Jijun Luo, Dillinger, M., Mohyeldin, E., Schulz, E.
• Format: Conference Proceeding
• Language: English
• Published: Piscataway NJ IEEE 2004
• Subjects: 3G mobile communication; Access methods and protocols, osi model; Adaptive arrays; Adaptive control; Adaptive systems; Antennas; Applied sciences; Communication system traffic control; Computer networks; Equipments and installations; Exact sciences and technology; Mobile radiocommunication systems; Programmable control; Radio control; Radio network; Radiocommunications; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Teleprocessing networks. Isdn; Teletraffic; Traffic control; Access control; Performance evaluation; Mobile radiocommunication; Target tracking; Wireless telecommunication; Teletraffic; Network management; System reliability; Adaptive method; Look up table; Tilt angle; Overlay network; Adaptive antenna; Simulation; Multifrequency antenna; Subsystem; UMTS system; Handover; Antenna array; Virtual network
• ISBN: 9780780385238; 0780385233
• DOI: 10.1109/PIMRC.2004.1368822

This work proposes an adaptive antenna tilting approach in an overlay UMTS FDD network. The purpose is to introduce and investigate an antenna element, which can be remotely controlled by the radio network, in order to adequately cater for the spatial and temporal dynamic traffic distributions. The tilting angle is computed by a two level control mechanism: the higher level is controlled by the network manager and consists of a look-up table with the possible ranges (intervals or discrete steps for angles) of the antenna angle adjustments. The element manager, e.g. RNC controlling and recording the track of the dynamic antenna changes, controls the lower level. To enhance the system reliability, we associate the less dynamic traffic with the primary fixed tilt antenna, whereas the more varying traffic is controlled by a second more dynamically tilted antenna element. Through system level simulations, we show that significant gains in term of system capacity can be obtained. In addition, solutions involving the network management subsystem in UMTS FDD are also given, where the element management platform interacts with the performance measurement units. Intelligent inter-frequency handovers are deliberately discussed.