LINK ADAPTATION FOR POINT-TO-MULTIPOINT CHANNEL

摘要

A network node ( 28 ) of a wireless telecommunication network ( 20 ) uses a first coding scheme (selected from plural possible coding schemes) for encoding of a point-to-multipoint (PTM) transmission carried to plural mobile stations ( 30 ) on a common downlink channel ( 32 ). The mobile stations ( 30 ) receiving the point-to-multipoint transmission on the common downlink channel ( 32 ) evaluate the link quality of the point-to-multipoint transmission. Feedback from the plural mobile stations ( 30 ) regarding the link quality of the point-to-multipoint transmission is provided to the network node ( 28 ) on a common uplink channel ( 36 ). A controller ( 48 ) at the network node ( 28 ) monitors information received on the common uplink channel for feedback regarding the link quality of the point-to-multipoint transmission. The controller ( 48 ) at the network node ( 28 ) uses the feedback to determine whether to change from the first coding scheme to a second coding scheme for the encoding of the point-to-multipoint transmission to the plural mobile stations ( 30 ).