TRANSMISSION OF CONTROL INFORMATION TO REDUCED BANDWIDTH TERMINALS

摘要

A method receiving data at a communications terminal from an OFDM wireless communications network including a wireless access interface communicating the data using plural OFDM sub-carriers includes: receiving from a first control channel having a bandwidth corresponding to a first frequency band providing first plural OFDM sub-carriers a resource allocation message allocating communications resources of a second group of OFDM sub-carriers; and receiving from a second control channel within the second frequency band within the second group of OFDM sub-carriers control information specific to the communications terminal operating to receive the data via the second group of OFDM sub-carriers. The communications terminal receives resource allocation messages from the first control channel to allocate resources within the second frequency band forming a virtual carrier and to receive control information specific to the communications terminal, which receives data from the second frequency band of the virtual carrier via a second control channel.

主权项

1. A communications terminal comprising
a transceiver unit configured to receive data from a wireless communications network transmitted via a wireless access interface provided by the wireless communications network using a plurality of OFDM sub-carriers, and a controller configured to receive a resource allocation message, which allocates resources to the communications terminal for receiving the data from the wireless communications network, wherein the controller is configured to control the transceiver unit to receive from a first control channel the resource allocation message, the first control channel having a bandwidth corresponding to a first frequency band, the resource allocation message allocating the communications resources within a second frequency band, the first frequency band providing a first group of the plurality of OFDM sub-carriers within the first frequency band, and the second frequency band being formed from a second group of the plurality of OFDM sub-carriers within a second frequency band, the second group of the plurality of OFDM sub-carriers being smaller than the first group of the plurality of OFDM sub-carriers and the second frequency band being selected from within the first frequency band to form a virtual carrier, to receive control information from a second control channel within the second frequency band from the second group of OFDM sub-carriers, wherein the control information is specific to receiving the data by the communications terminal from the second group of OFDM sub-carriers.