TY  - JOUR
TI  - OFDMA-based multicast with multiple base stations
AB  - We consider an orthogonal frequency division multiple access (OFDMA)-based multicast system where multiple base stations transmit a multicast session to a multicast group. The goal is to maximize the multicast rate (i.e. the minimum achievable user rate) subject to a total power constraint. We assume the use of an erasure code (e.g., a Reed Solomon code) or rateless code (e.g., Luby transform code). This facilitates each user to accumulate rates from their best subchannels, so that the achievable multicast rate is not limited to the worst user. The resource allocation problem involves determining the transmitting base station at each OFDMA subchannel, the number of bits to be transmitted at each subchannel, and the set of nodes to decode the bits at each subchannel. We formulate the problem as a mixed binary integer linear programming and find the optimal solution as a benchmark. We also propose a greedy subchannel and bit allocation algorithm that is close to optimal.
AU  - GİRİCİ, Tolga
AU  - KAZEZ, Ahmet Cihat
PY  - 2015
JO  - Turkish Journal of Electrical Engineering and Computer Sciences
VL  - 23
IS  - 5
SN  - 1300-0632
SP  - 1372
EP  - 1383
DB  - TRDizin
UR  - http://search/yayin/detay/180501
ER  -