Changes between Version 7 and Version 8 of 802.11/MAC/Lower/DCF

Timestamp:

Aug 7, 2015, 1:52:58 PM (9 years ago)

Author:

chunter

Comment:

--

802.11/MAC/Lower/DCF

@@ -124 +124 @@
                 case ACK:
                         wait for FCS
-                        if (FCS good )
+                        if( FCS good )
                                 raise corresponding return flag
                 case CTS:
@@ -172 +172 @@
 ----
 
-In the DCF, the {{{frame_rx_callback()}}} is attached to the {{{frame_receive()}}} function. In the above MPDU transmission state, we have already seen some executions of this function to deal with the receptions of ACK and CTS frames. Independently of these actions, the {{{frame_receive()}}} function needs to pass receptions up to CPU_HIGH
+In the DCF, the {{{frame_rx_callback()}}} is attached to the {{{frame_receive()}}} function. In the above MPDU transmission state, we have already seen some executions of this function to deal with the receptions of ACK and CTS frames. Independently of these actions, the {{{frame_receive()}}} function needs to pass receptions up to CPU_HIGH and, if needed, generated acknowledgment responses.
+
+Pseudocode:
+{{{
+if( RA address is to me )
+        switch( packet type )
+                case DATA:
+                        wait for FCS
+                        if( FCS good )
+                                configure MAC support core to send ACK after SIFS interval
+
+if( frame passes CPU_LOW filter )
+        call MAC Low Framework function to send IPC message to CPU_HIGH
+                stating that the Rx MPDU is ready to be processed
+}}}