Patent ID: 7953119
Filing Date: 2011-05-31
Classification: H04J,H04L

Abstract:
1. A method for transmitting a downlink Synchronization CHannel (SCH) in a cellular communication system supporting a scalable system bandwidth and using multiple access technology, the method comprising the steps of: transmitting a first SCH sequence used for acquisition of downlink synchronization after mapping the first SCH sequence to a central band having an SCH transmission bandwidth centering on a central frequency of a system bandwidth in a first sub-frame of a first Transmission Time Interval (TTI) that is selected from among multiple TTIs constituting a frame; and transmitting a second SCH sequence used for acquisition of downlink synchronization after mapping the second SCH sequence to at least one of a first transmission band and a second transmission band, each of which has the SCH transmission bandwidth, in a second sub-frame following the first sub-frame within the first TTI, the first and second transmission bands being located within useful bands of opposite sides adjacent to the central frequency, respectively, each of the useful bands having a minimum reception bandwidth supportable by User Equipments (UEs) within a cell.