|Clause title:||Media-dependent layer specification for IEEE 802.11 links|
Rationale for revision
In the course of developing modifications to the master state machine (Figure 12-3) and slave state machine (Figure 12-4) for the inclusion of the Fine Timing Measurement (FTM) feature in P802.1AS-Rev, several minor errors and typos were discovered. These should be fixed in 802.1AS-Rev.
a) Master state machine (Figure 12-3) In the SAVE_CONFIRM_INFO state: (i) In the comment (Note) that says that upstreamTxTime is in units of 2^(-16) seconds, it should be 2^(-16) ns (ii) In the expression for residenceTime, the factor of 10^9 that multiplies paramsFromConfirm.T1 should actually be 10 (because paramsFromConfirm.T1 is in units of 10 ns, not in units of seconds. b) Slave state machine (Figure 12-4) In the CONSTRUCT_MD_SYNC_RECEIVE_STRUCTURE state: (i) The expression for neighborPropDelay currently reads: neighborPropDelay = (indParams.T4 - indParams.T1) - neighborRateRatio * (indParams.T3 - indParams.T2)) / 2.0; This is missing an open parenthesis and a factor of 10 to convert from units of 10 ns to units of ns. The correct expression is: neighborPropDelay = ( ( (indParams.T4 - indParams.T1) - neighborRateRatio * (indParams.T3 - indParams.T2)) / 2.0) * 10; (ii) The expression for MDSyncReceive.VendorSpecific.upstreamTxTime currently reads: MDSyncReceive.VendorSpecific.upstreamTxTime = indParams.T2 - neighborPropDelay/neighborRateRatio; It is missing factors of 2^16 and 10 (to convert to units of 2^(-16) ns). The correct expression is: MDSyncReceive.VendorSpecific.upstreamTxTime = indParams.T2* (2^16) *(10) - neighborPropDelay*(2^16)/neighborRateRatio; (iii) The statement: previousIndParams = indParams should be moved outside the if block (i.e., to just after the close brace).
Impact on existing networks
There is no impact on existing networks.
|Name:||Geoffrey M. Garner||Email:||firstname.lastname@example.org <mailto:email@example.com>|
|Affiliation:||Broadcom, Hirshman, Marvell, Siemens|