Active bandwidth indicator for power-saving UEs

摘要

The present invention relates to a terminal and a base station, and to a receiving and transmitting method to be performed at the terminal and the base station, respectively. In particular, the present invention relates to power consumption reduction by providing two operation bandwidths for a terminal, one being a cell-bandwidth, a bandwidth in which the cell may operate and the other one is a bandwidth, lower than the cell-bandwidth and called power-saving bandwidth. The terminal may perform the initial cell search including reception of the system information in the cell bandwidth and perform other reception/transmission/monitoring operation(s) in the power-saving bandwidth. Accordingly, a low-cost terminal implementation is enabled, which is particularly advantageous for the machine communication terminals.

主权项

1. A method for receiving signals in a cellular communication system with multiple subcarriers, the method being performed at a terminal and comprising the steps of:
integrating a low-power consumption machine-type communication terminal in the cellular communication system, said low-power consumption machine-type communication terminal being configured to monitor sensor data in the cellular communication system; monitoring a physical control channel or a physical channel for uplink or downlink resource assignments in a power-saving bandwidth; operating on a cell bandwidth with a first number of subcarriers for initial terminal operations and for receiving system information transmitted by a base station including information about the cell bandwidth; operating on a power-saving bandwidth with a second number of subcarriers smaller than the first number of subcarriers for receiving a physical control channel or a physical channel conveying uplink or downlink resource assignments; receiving an active bandwidth indicator transmitted to the terminal from the base station; after receiving the active bandwidth indicator while operating in the power saving bandwidth, operating in the cell bandwidth or vice-versa.