Dynamic Hotspot Management with RET Antennas for UMTS Core and Extension Bands
Original Publication Date: 2004-Jul-25
Included in the Prior Art Database: 2004-Jul-25
Related PeopleOther Related People:
Third generation mobile communication systems based on UMTS face the problem of an exponential increase in the power supply needed with the linear increase in the number of users in a cell. This results in smaller cell sizes compared to GSM cells, and consequently leads to an increase in the CAPEX (Capital Expenditure) and OPEX (Operative Expenditure). Moreover, with the advent of new wireless technologies, like the 802.1x family, the importance of overlay networks has increased. A third dimension is the scarceness of the frequency spectrum. Solutions for efficient usage of radio resources combined with an optimized dynamic geographical distribution are needed. In the following, a new concept is described that improves the interworking of the tilting process of RET (Remote control of Electrical Tilting) antennas and the connection management. The concept assumes that apart from the 'Core Band' (CB) allocated to UMTS, which extends from 1.92-1.98 GHz for the uplink and 2.11-2.17 GHz for the downlink, also an 'Extension Band' (EB) exists. It has been proposed by ITU-R WP8F (WARC, etc.) that this UMTS Extension Band should be in the 2.5 to 2.69 GHz region. So far, seven scenarios for the usage of the EB have been suggested by the ITU. These are depicted in Figure 1.