Hi, all I encountered a little question about SIFS_Waiting state in802.11 DCF , while attemting to learn and extending the 802.11Ext implementation for NS2.34.
When a node(A) receives a RTS frame, it will responds an CTS_1 after aSIFStime if these no NAV, which means it is going to receive DATA . Is it possible that the node (A) transmit another frame during the SIFS? During SIFS, the Backoff, channel state and NAC may all report OK to transmit. If another frame(F2) is transmit by MAC after its SIFS, the PHY is very likely still in Transmittin state for the first CTS_1, which seems like an error for PHY. The reason I notice this question is, that I am desining an reliable multicast_MAC extention for 802.11, which demands the intended receivers to respends CTS sequentially . So some receivers will wait longger time before transmitting CTS, and during this waiting time, any other transmission is not allowed logically. I use NAV to acheive this purpose, i.e. set NAV = wait_time. Any help will be appriciated. Regards, -Kara-