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    • 8. 发明公开
    • MULTICAST SCHEDULING AND LINK ADAPTATION
    • 组播规划和链路适配
    • EP2462711A1
    • 2012-06-13
    • EP09782891.7
    • 2009-09-10
    • Telefonaktiebolaget LM Ericsson (publ)
    • HUSCHKE, JörgPHAN, Mai-Anh
    • H04L1/00H04W72/12
    • H04L1/0002H04L1/0026H04L47/806H04W4/06H04W72/1226
    • The invention relates to a method for transmitting multicast information from at least one transmitter (BS, Tx) to a plurality of receivers (UE
      1 , UE
      2 ,... UE
      N ), comprising determining (S
      10 ) a channel quality measure (r
      u,s ) of each receiver (UE
      1 , UE
      2 ,... UE
      N ), adapting (S60) transmission rates (Ra
      s) of the transmitter (BS) to cause the transmitter (BS) to transmit at different rates (Ra
      s ) for different transmission resource units, particularly transmission time intervals (TTI), based on the channel quality measures (r
      u,s ) of the plurality of receivers (UE
      1 , UE
      2 ,... UE
      N ), assigning (S20, S30) a weight value (w
      u,s ) and a cumulative weight value (wc
      u,s ) to each receiver out of the plurality of receivers (UE
      1 , UE
      2 ,... UE
      N ), wherein at least for a subset out of the plurality of receivers (UE
      1 , UE
      2 ,... UE
      N ) said cumulative weight value (WC
      u,s ) is a function calculated by taking into account weight values of other receivers out of the plurality of receivers (UE
      1 , UE
      2 ,... UE
      N ), calculating (S40), for each receiver (UE
      1 , UE
      2 ,... UE
      N ), a weighted channel quality measure (wr
      u,s ) being a function of the respective cumulative weight value (wc
      u,s ) for this receiver (UE
      1 , UE
      2, ... UE
      N ) and its channel quality measure (r
      u,s ), and adapting (S60) the transmission rate (Ra
      s ) such that it meets the channel quality (r
      u,s ) of the receiver having the maximum weighted channel quality measure (wr
      uo,s ). The invention further relates to a network access node (BS, AN), comprising a transmitter (BS, Tx) adapted to transmit multicast information to a plurality of receivers (UE
      1 , UE
      2 ,... UE
      N ), said transmitter (BS, Tx) being able to transmit at different transmission rates (Ra
      s ) for different transmission resource units, particularly transmission time intervals (TTI), means for determining a channel quality measure (r
      u,s ) for each of said plurality of receivers (UE
      1 , UE
      2 ,... UE
      N ) and a processor, said network access node (BS, AN) being adapted to perform the described method.