| 摘要 |
A mobile communications system includes one or more base stations configured with a wireless access interface providing a plurality of resource elements across a first frequency range and a plurality of resource elements within a second frequency range (virtual carrier region 501) which is within and smaller than the first frequency range. The wireless access interface includes a plurality of time divided sub-frames, at least one including a first wideband control channel 300 in a first part of each sub-frame, and a second narrow band control channel 600 in a second part of each sub-frame, having a bandwidth which is less than the first wideband control channel and a duration greater than the first wideband control channel within the sub-frame. The second narrow band control channel is configured for communicating second signalling information to one or more communications devices. The base stations are configured to transmit a sleep indication signal 700 to one or more of the communications devices, indicating that they do not need to receive the second signaling information from the second narrow band control channel. Accordingly a power saving to the communications devices (Machine Type Communication (MTC) devices) which are not to receive the second signalling information for one or more sub-frames is provided. |
