Medium Access Control (MAC) and Physical Layer (PHY) - CISE

4-June-07 P1901_PRO_016_r0
Figure 99 Info field format
Bits number 1 to 4 are devoted to set the message type of the Capability Exchange Protocol (See section 0)
9.1.4.4 Periodic publication of Port Solver information
Each Announce Time period (30 seconds) each node sends an Announce Message (AnM) publishing Port Solver
information. This message contains a list with pairs of values (entry MAC address and assigned LP).
Upon the reception of an AnM, the PST shall be modified in the following cases:
• The sender MAC address is in a completed entry of the PST and the AnM LP value associated to the node
MAC address is different from the PST RP value associated to the sender MAC address � the RP shall be
updated (see Figure 100)
• The sender MAC address is in the PST but the MAC address of the node is not in the AnM � Set PST RP
value associated to the sender MAC address to 0xFF (see Figure 101)
• The sender MAC address is in a incomplete entry of the PST, and the sender is either slave or master of the
receiving node � the RP shall be updated
AnM from A
MAC D LP 11
MAC C LP 10
MAC B LP 9
PST in C
Rx AnM from A
MAC A LP 11
MAC D LP 10
MAC B LP 9
RP 12 10
Submission page 216 UPA-OPERA
C
RP 255
RP 255
Figure 100 Announce Messages