1. Project Team : - Marwa Mekki & Seray Bundu
Zigbee Data Packager
Project Team : -
Marwa Mekki & Seray Bundu

2. What is Zigbee?
Wireless Personal Area Network (WPAN) that is a ”superset” of IEEE specification
IEEE specifies the PHYsical and Media Access Control (MAC) layers
Zigbee defines:- network, security and application layers atop the PHY and MAC layers

3. Zigbee application spheres
Technology that ranges from
sensor networks
industrial monitoring and control
home automation
medical and automotive solutions etc.
With low data levels that can be transmitted from ranges 10 – 70m are possible.

4. Zigbee & ieee overview
The standard specifies (for use by the PHY & MAC layers) the freqs:
868, 915 MHz & 2.4 GHz for communication
PHY layer includes
Receiver energy detection (ED)
Link quality indication (LQI) and
Clear channel assessment (CCA)
MAC layer handles
Network association and disassociation
Optional superframe structure with beacons
Gauranteed timeslot mechanism

5. Zigbee & ieee 802.15.4 overview The technology handles
Inter-operability
Conformance testing specifications
Device discovery
Network configuration and
Supports the star, mesh(peer-to-peer) and cluster-tree (hybrid tree/mesh).
The data will be transfered as packets with maximum size of 128 bytes, enabling a maximum payload of 104 bytes.

6. Zigbee & ieee overview
Frame types used in data transmission are: Data frame
MAC
Sublayer
PHY
layer
Frame Control
(2)
Sequence Number (1)
Add fields
(4 to 20)
Data payload
(104)
FCS
MHR
MSDU
MFR
Preamble
Seq.
(4)
Start of frame Delim.
(1)
Frame length
MPDU
SHR
PHR
PSDU
PPDU

7. Zigbee & ieee 802.15.4 overview MAC command frame MAC sublayer PHY
Frame Control (2)
Seq. # (1)
Add fields
(4 to 20)
Comm type (1)
Comm payload (103)
FCS (2)
MHR
MSDU
MFR
Preamble seq. (4)
Start of frame delim (1)
Frame length (1)
MPDU
SHR
PHR
PSDU
PPDU

8. Superframe Specification
Zigbee & ieee overview
Beacon frame
MAC
sublayer
PHY
layer
Frame Control (2)
Seq. # (1)
Add fields
(4 to 10)
Superframe Specification
(2)
GTS fields (23)
Pending Add fields (57)
Beacon payload (32)
FCS (2)
MHR
MSDU
MFR
Preamble seq. (4)
Start of frame delim (1)
Frame length (1)
PSDU
SHR
PHR
MPDU
PPDU

9. Zigbee & ieee 802.15.4 overview Acknowledge frame MAC sublayer PHY
Frame Control (2)
Seq # (1)
FCS (2)
MHR
MFR
Preamble sequence (4)
Start of frame delim (1)
Frame length (1)
MPDU
SHR
PHR
PSDU
PPDU

10. Module Design Interfaces Base – µP Module band module Clk Reset
W_E Request
Addr Ack
Data µP
Module
Base –
band
module

11. Start of frame delimiter
Module Design
For the 4 data types written to the RAM by the µP, Da T a
ype S I ze of
add
Info
Pay
load
Size
GTS
fields
Size of pend add
field
Preamble sequence ”
Start of frame delimiter Fr
ame
Con t r ol
Leng th ta
sequence #
Command
Super
frame
Specs
Pending
Address L
oad
Reg E

12. Module Design Register Clk En_Reg qout Data Reset Register Control
Ram
Reg µP
Add G
Control
CRC 3 2
Register

13. Module Design Address decoder Clk En En_Reg Addr Add Dec Control µP
Ram
Reg µP
Add G
Control
CRC 3 2
Add
Dec

14. Module Design Controller clk en_mux ack en_crc
Request sel, add
reset en_add_gen, init_add_gen
start reset_crc
frame reset reg, add_gen
Ram
Reg µP
Add G
Control
CRC 3 2
Controller

15. Size of Pending Add fields
Module Design
Address generator
clk
reset
add en
init gen_ack
frame_type
gen_out
Ram
Reg µP
Add G
Control
CRC 3 2
Data Type
Size of Address Info
Size of payload
Size of GTS fileds
Size of Pending Add fields

16. Module Design Multiplexer 8-bit addr/data 8-bit o/p Control switch
Ram
Reg µP
Add G
Control
CRC 3 2

17. Module Design CRC G(x) = x16 + x12 + x5 + 1 and parallel LFSR clk
en o/p high
Initialize o/p low
data_in
CRC
computer

18. Module Design Data flow Add Gen MUX 1 μP RAM Controller MUX 2 Reg Add
Dec
CRC
Gen
MUX 3

19. Results From synthesis: - Devices Area Max. Freq (MHz)
# of slices (768)
# of Slice FF
(1536)
# of 4 input LUT (1536)
# of IO blocks (124)
# of block RAMs (4)
RAM - 26 1
Add Decoder 2 3 10
Register 9 16 8 18
657.46
MUX 1 25
Add Generator
225
120
418 22
117.85
MUX 2
CRC Generator 13
397.14
MUX 3
Controller 28 27 50 34
362.97

20. Questions ?
Questions???