| 摘要 |
A mobile communications system for transmitting data to and/or receiving data from communications devices includes one or more base stations, each of which includes a transmitter and a receiver. The transmitter and the receiver are configured to provide a wireless access interface for communicating data to and/or from the communications devices. The wireless access interface provides a plurality of communications resource elements across a first frequency range and a plurality of communications resource elements within a second frequency range 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 of the sub-frames including a first wideband control channel in a first part of each sub-frame for communicating first signalling information to one or more of the communications devices, and a second narrow band control channel in a second part of each sub-frame and having a bandwidth which is less than the first wideband control channel and a duration of the second narrow band control channel within the sub-frame is greater than a duration of 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 of the communications devices. The base stations are configured to transmit a sleep indication signal to one or more of the communications devices, the sleep indication signal indicating to the one or more of the communications devices that the communications devices do not need to receive the second signalling information from the second narrow band control channel. Accordingly a power saving to the communications devices which are not to receive the second signalling information for one or more sub-frames is provided. |
