Telecommunications systems and methods for machine type communication

摘要

A method for communicating data between a base station and a terminal device in a wireless telecommunications system, for example an LTE-based system. The wireless communication system uses plural frequency sub-carriers spanning a system frequency band. Physical-layer control information for the terminal device is transmitted from the base station using sub-carriers selected from across the system frequency band, for example to provide frequency diversity. However, higher-layer data for the terminal device is transmitted using only sub-carriers selected from within a restricted frequency band which is smaller than and within the system frequency band. The terminal device is aware of the restricted frequency band, and as such need only buffer and process data within this restricted frequency band during periods where higher-layer data is being transmitted. The terminal device buffers and processes the full system frequency band during periods when physical-layer control information is transmitted.

主权项

1. A method of operating a terminal device for receiving data from a base station in a wireless telecommunications system using a plurality of sub-carriers spanning a system frequency band, the method comprising:
receiving and buffering physical-layer control information transmitted by the base station in a subframe on sub-carriers spanning the system frequency band; receiving and buffering higher-layer data transmitted by the base station in the subframe only on sub-carriers spanning a predetermined restricted frequency band that is smaller than and within the system frequency band; processing the buffered physical-layer control information to determine an allocation of higher-layer data for the terminal device within the restricted frequency band; and processing the buffered higher-layer data to extract the allocated higher-layer data for the terminal device from the restricted frequency band.