| 摘要 |
Wimax (IEEE 802.16e) networks are capable of handling full frequency division duplexing, however for economic and other reasons it may be desirable to operate half frequency division duplex (HFDD) terminals on the network. The invention proposes a frame structure with an initial downlink broadcast period 1005, followed by a half duplex downlink period1007 followed by a half duplex uplink period 1013. At the very end of the frame special transmission can be sent 1015/1017, with full duplex units going last 1017 so that half duplex units can use the time to switch back to downlink/receive mode. Uplinks from full duplex units, and possibly half duplex units not scheduled to receive downloads, are scheduled into the half duplex download period 1011. Similarly full duplex downloads are preferably scheduled during the half duplex download period 1009. All of the periods have variable durations which are advised along with terminal allocations in a map broadcast by the base station. |
