| 摘要 |
<p>Methods and apparatus for transmitting data to terminal devices in a wireless telecommunications system are described. The data may be user-plane data associated with a repeating Multimedia Broadcast / Multicast Services (MBMS) session which is to be transmitted using MBMS over a Single Frequency Network (MBSFN) techniques in a network comprising at least one relay node supported by a donor base station. The scheme involves delivering the data from the base station to the relay node in advance of a scheduled transmission to terminal devices at a first time, and transmitting the data from the relay node to a terminal device at the first time. The relay node is further arranged to store the data in a cache. The relay node may then retrieve the data from the cache in advance of a scheduled transmission to terminal devices at a second time, and transmit the retrieved data to a terminal device at the second time. Thus the relay node is able to play a role in supporting a repeated MBSFN transmission at both a first time and a second time, while only receiving data from the base station once. This saves on the resources that would otherwise be used in delivering data for subsequent transmission from the base station to the relay node.</p> |
