Changes between Version 22 and Version 23 of Letibee
- Timestamp:
- Nov 5, 2010, 12:35:34 PM (14 years ago)
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Letibee
v22 v23 45 45 [[Image(rime.png, 70%, center)]] 46 46 47 Figure 2 : RIME network stack47 Figure 2 : RIME network stack 48 48 49 49 Modules, used in the application, are described below: … … 63 63 === Sequences of operations and protocol aspects === 64 64 65 The mesh operation is adequately built with a “route discovery” routine since the goal is to send frame (resquest/response) to node in the network. The “route discovery” routine is used to build a route to forward the frame in the network. Once the route is build, the unicast “routing” from the originator to the addressee can be used. 66 The netflood operation is use to flood all nodes in the network. 65 The mesh operation is built in an ad hoc manner with a “route discovery” routine since the goal is to send frame (resquest/response) to node in the network. 66 The “route discovery” routine is used to build the route used to deliver the frames through the network. 67 Once the route is build, the unicast “routing” from the originator to the addressee can be used. 68 69 The netflood operation can be used to flood all nodes in the network. 67 70 68 71 ==== Network frame format ==== 69 72 70 All packets are transmitted on the radio channel according to the framing of the IEEE802.15.4 standard (Erreur : source de la référence non trouvée) where the useful packet for the MAC, the MPDU(=PSDU), length is limited to 127bytes. 71 The frame formats transmitted over the air are summarised here: 72 73 73 All packets are transmitted on the radio channel according to the framing of the IEEE802.15.4 standard (Figure 3) where the useful packet for the MAC, the MPDU(=PSDU), length is limited to 127bytes. 74 The frame formats transmitted over the air are summarised here after. 74 75 75 76 [[Image(frame_format.png, 60%, center)]] … … 85 86 Figure 4 : Frame format over the USB port. 86 87 87 To sink from gateway, the source address is added at its beginning of the APDU, the rest of the frame being unchanged. To gateway from sink, ‘/0’ ascii characters is added at its ending of the APDU. 88 *To sink from gateway, the source address is added at its beginning of the APDU. 89 The rest of the frame being unchanged. 90 91 *To gateway from sink, ‘/0’ ascii characters is added at its ending of the APDU. 88 92 89 93 ==== LOOKUP operation ====