TELECOMMUNICATIONS SYSTEM, APPARATUS AND METHOD FOR COMMUNICATING TO A FIRST AND A SECOND CLASS OF TERMINALS USING A FIRST AND/OR A SECOND CARRIER

摘要

A telecommunications system communicating data to/from one or more terminals, including one or more transmitters to transmit first and second carriers over respective first and second frequency bandwidths. During a first time period the transmitters can transmit data receivable by first and second classes of terminal on the first and second carriers. During a second different time period, the transmitters can transmit data to the second class of terminal on the first and second carriers in combination. A data transmission format on the first carrier in the first time period is incompatible with a user data transmission format on the second carrier during the first time period. The transmitters can transmit control data on the first carrier in the first time period which is receivable by the second class of terminal to enable the second class of terminal to maintain synchronisation with the first carrier during the first time period.

主权项

1. A terminal device for use in a telecommunications system in which a first carrier is transmitted over a first frequency bandwidth and a second carrier is transmitted over a second frequency bandwidth, and
during a first time period the terminal device is operable to receive data on the first carrier, and a transmission format for data on the first carrier in the first time period is incompatible with a transmission format for data on the second carrier during the first time period, and wherein the terminal device belongs to a first class of terminal device and control data on the first carrier in the first time period is receivable by a second class of terminal device different to the first class of terminal device to enable the terminals devices of the second class to maintain synchronisation with the first carrier during the first time period.