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-
