Patent ID: 7929479

Claim:
A method for Multicast Broadcast Service (MBS) over Mobile Multi-hop Relay (MMR) network using dynamic modification of Modulation and Coding Scheme (MCS) level, comprising: deciding MCS level for transmission between base station (BS) and relay station (RS); deciding MCS level for transmission between the RS and mobile station (MS) based on the MCS level for transmission between the BS and the RS; and transmitting an MCS control message to the RS informing of the MCS level for transmission between the RS and the MS; wherein said deciding MCS level for transmission between the RS and mobile station (MS) comprises: calculating spectrum efficiency of the MS (ME) using Equation below based on spectrum efficiency of the RSi (REi) corresponding to the decided MCS level for transmission between the BS and the RS and throughput of the overall MBS system (MBSthr); and selecting MCS level corresponding to the ME as optimum MCS level for the transmission between the RS and the MS; M ⁢ ⁢ B ⁢ ⁢ S thr = ( ∑ i = o n - 1 ⁢ RB i + M ⁢ ⁢ B ) × ( 1 ME + ∑ i = 0 n - 1 ⁢ 1 RE i ) - 1 where RBi denotes bandwidth for RSi and MB denotes bandwidth for MS, n is a natural number, and i is an integer between 0 and n−1.