Changes between Version 115 and Version 116 of 802.11/Changelog

Timestamp:

Dec 17, 2015, 11:55:27 AM (8 years ago)

Author:

chunter

Comment:

--

802.11/Changelog

@@ -17 +17 @@
 '''MAC Software Changes:'''
  * Used new wlan_mac_time_hw core to simplify handling of timestamps throughput design
+ * Moved beacon transmissions in the AP over the [wiki:802.11/MAC/Upper/MACHighFramework/Scheduler fine scheduler]. This provides greater flexibility for modifying the beacon interval since the minimum resolution is no longer bound to the coarse scheduler resolution.
+ * Reduced coarse scheduler resolution from 102.4ms to 200.0ms.
   * '''MAC Time''' used for MAC TSF (timestamps in Tx beacons, timestamp updated from Rx beacons) and for all log entry timestamps. Code can change MAC Time with {{{set_mac_time_usec(u64 new_time)}}} or apply a time delta with {{{apply_mac_time_delta_usec(s64 time_delta)}}}. These functions are supported in both CPUs.
   * '''System Time''' is a new 64-bit microsecond counter that cannot be changed from code. The counter starts after the FPGA is configured and runs continuously, even across CPU resets. The System Time is useful where a timer with guaranteed monotonicity is required. The MAC High Framework scheduler and the AP's node activity timeouts now use the System Time. The System Time can be recorded in the node's event log via {{{TIME_INFO}}} entries.