Seokjoo Shin Kanghee Kim Sangwook Na Scheduled Uplink Packet Transmission Schemes for Voice Traffic in OFDMA-Based Wireless Communication Systems. 70-79 2007 ICOIN http://dx.doi.org/10.1007/978-3-540-89524-4_8 conf/icoin/2007 db/conf/icoin/icoin2007.html#ShinKN07