Wireless transmission method, base station, relay station and mobile station using the same

摘要

A wireless transmission method, a base station, a relay station, and a mobile station using the same methods are proposed. The method is adapted for delivering MBS in a relay system, and includes following procedures. MBS data is transmitted by a base station at a first time point to at least a subordinate mobile station. The MBS data is also transmitted at the first time point or at a later time point from the base station to subordinate relay node(s) thereof. The base station and relay node(s) at an upper hop level decide whether to transmit a duplicate of the MBS data simultaneously with the relay node(s) at a lower hop level when the lower hop level relay node(s) is scheduled to transmit the received MBS data at the later time point. An indicator is used to indicate any two transmissions being identical.

主权项

1. A wireless transmission method, adapted for delivering multicast broadcast service (MBS) in a relay system, comprising:
transmitting MBS data, at a base station, to at least a subordinate mobile station of the base station at a first time point; transmitting the MBS data, at the base station, to at least a subordinate relay node of the base station at the first time point or at a second time point, which is later than the first time point; deciding, at the base station and the at least a relay node at an upper hop level, whether to transmit a duplicate of the MBS data simultaneously with at least a relay node at a lower hop level when the at least a relay node at the lower hop level is scheduled to transmit the received MBS data at a time point later than the first time point; and using an indicator to indicate any two transmission being identical; wherein each one of mobile stations in the relay system is allowed to overhear MBS transmission from the base station or the at least a relay node, which do not have direct control over the mobile station or the mobile stations which overhear wherein such overhearing opportunities may be deemed as redundancies.