| 摘要 |
Schemes for supporting device-to-device, D2D, communications between terminal devices in a wireless telecommunication system are disclosed. A network entity, e.g. a base station, establishes a set (pool) of radio resources to be reserved for use for D2D communications and communicates an indication of these resources to terminal devices. The terminal devices may then proceed to undertake D2D communications using the reserved set of radio resources. On an ongoing basis the network entity monitors the extent to which the set of radio resources reserved for D2D communications is being used, for example based on feedback received from terminal devices or its own measurements. If it is determined the set of radio resources reserved for D2D communications is being under-utilized or over-utilized, the network entity may establish an updated set of radio resources to be used for D2D communications, and communicate this to the terminal devices. For example, if the reserved resources are being under-utilized by at least a predefined amount, the amount of resources set aside for D2D communications may be reduced. Conversely, if the reserved resources are being over-utilized, e.g. more than a predefined fractional utilization, the set of resources may be increased. Thus a mechanism is provided for dynamically adjusting the size of a set of resources available for D2D communications in response to changing resource utilization. This can help with optimizing overall resource usage within the wireless telecommunication system with reduced risk of D2D congestion. |
