| 摘要 |
The present disclosure provides a method implemented in an MCE for performing downlink power control for a multicast or broadcast service which is collectively provided from a number (N≥2) of radio base stations (BSi, i＝1,..., N) to a number (M≥2) of terminal devices (UEj, j＝1,..., M). The method comprises collecting path-loss attenuations (cji, i＝1,..., N; j＝1,..., m (m≤M) ) between the radio base stations (BSi,i＝1,..., N) and all or a subset of the terminal devices (UEj, j＝1,..., m (m≤M) ). The method further comprises calculating transmission powers (P mbsfn T i,i＝1,..., N) for the radio base stations (BSi, i＝1,..., N) based on the collected path-loss attenuations (cji, i＝1,..., N; j＝1,..., m), such that a sum of the transmission powers (∑) is minimized under a set of constraints on reception powers at said all or said subset of the terminal devices (UEj, j＝1,..., m (m≤M) ). Each of the radio base stations (BSi, i＝1,..., N) is notified of a corresponding one of the calculated transmission powers (P mbsfn T i,i＝1,..., N). The present disclosure also provides an MCE for performing downlink power control for a multicast or broadcast service. |
