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

What is Zigbee? Wireless Personal Area Network (WPAN) that is a ”superset” of IEEE 802.15.4 specification IEEE specifies the PHYsical and Media Access Control (MAC) layers Zigbee defines:- network, security and application layers atop the PHY and MAC layers

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.

Zigbee & ieee 802.15.4 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

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.

Zigbee & ieee 802.15.4 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

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

Superframe Specification Zigbee & ieee 802.15.4 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

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

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

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

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

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

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

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

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

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

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

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

Questions ? Questions???