Atmel AVR2070 User Manual
38
AVR2070
8240B-AVR-06/09
Table A-5-1. Beacon request and beacon frames
E1 FCF – beacon req
0x0803
Seq
01
Broadcast PAN ID
0xffff
Broadcast short addr
0xffff
07 (beacon req)
0x07
C
FCF – beacon
0x8000
Seq
01
PID
0x1234
Coord SA
0x0000
Superframe
0x40ff
ID (6=6LoWPAN)
0x06
Hops
0
E1 selects C based on zero hops, and sends association request. The payload
contains E1's MAC address, and the SA of the parent. This is called a “direct
association request” because the source address is a long (MAC) address and the
frame was sent directly from the associating node.
contains E1's MAC address, and the SA of the parent. This is called a “direct
association request” because the source address is a long (MAC) address and the
frame was sent directly from the associating node.
Table A-5-2. Association request frame (direct)
E1 FCF –assoc req
0xC863
Seq
02
PID
0x1234
C SA
0x0000
E1 MAC addr
0x1122334455667788
MAC
01
Parent SA
0x0000
Type
0x03
0x03
C assigns E1 to its table of nodes, and sends an association response. This is a
“direct association response” because the destination address is a long address, so
that the frame is sent directly to the newly-associated node.
Table A-5-3. Association response frame (direct)
C FCF – assoc rsp
0x8C63
Seq
03
PID
0x1234
E1 MAC
0x1122334455667788
Coord SA
0x0000
MAC Cmd
02
E1 SA
0x0002
E1 stores two addresses: its own newly-acquired short address, and the short
address of its parent.. In this case the parent is the coordinator C.
address of its parent.. In this case the parent is the coordinator C.
E1 sends data to coordinator C as needed.
Table A-5-4. Data packet to coordinator
E1
FCF – data
0x8861
Seq
04
PID
0x1234
Coord SA
0x0000
E1 SA
0x0002
Final
Dest SA
0x0000
Origin
SA
0x0002
Frame
Type
0x01
0x01
Payload
per
application
A.5.2 Example 2 – Router R1 connects to Coordinator C
Coordinator C has started and has chosen PANID = 0x1234, and short address =
0x0000
0x0000
Router node R1 starts, does a scan, and finds the coordinator C (and receives no
other beacons).
other beacons).
Table A-5-5. Beacon request and beacon frames
R1 FCF – beacon req
0x0803
Seq
01
Broadcast PAN ID
0xffff
Broadcast short addr
0xffff
07 (beacon req)
0x07
C
FCF – beacon
0x8000
Seq
01
PID
0x1234
Coord SA
0x0000
Superframe
0x40ff
ID (6=6LoWPAN)
0x06
Hops
0
R1 selects C as it is the only available network, and sends an association request.
Table A-5-6. Association request (direct)
R1 FCF –assoc req
0xC863
Seq
02
PID
0x1234
C SA
0x0000
R1 MAC addr
0x3333444455556666
MAC
01
Parent SA
0x0000
Type
0x02