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

4-June-07 P1901_PRO_016_r0
7
6
Type
MasterId[3][7:4]
MasterId[3][3:0]
MasterId[4][3:0]
MasterId[5][3:0]
MasterId[6][3:0]
Always MUST be set to 0
4.4.2.8 Access Reply Token
The Access Token has the following fields:
5
4
5F
73
EE
E2
Always MUST be set to 0
Validity [7:0]
Unused Frame Symbols [7:0]
MAC [0]
MAC [1]
MAC [2]
MAC [3]
MAC [4]
MAC [5]
3
Equivalent Speed
Always MUST be set to 0
Direction Type of Node
Submission page 124 UPA-OPERA
2
Validity [11:8]
Number of Hops
Unused Frame Symbols [12:8]
Figure 47 Access Token
- Preamble – 32 bits. The preamble is equal to 0x5F73EEE2.
- Type – 4 bits. Type shall be ACCESS_REPLY (14).
- Direction –1 bit. Shall be set to UPSTREAM (1).
- Type of Node – 2 bits. See above.
1
MasterId[4][7:4]
MasterId[5][7:4]
MasterId[6][7:4]
- MID – 32 bits. Part of the Master ID not included in the Token Announce.
0
Always MUST be
set to 0
preamble
- Disconnect – 1bit. If this field is set to 0, the token is a normal ACCESS REPLY TOKEN, used to achieve
access to the network through a master. If it is set to 1, the token becomes an ACCESS REPLY
DISCONNECTION TOKEN, used to leave a master.
- Destination Port – 7 bits. Local Port assigned to the master.