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Wait4Bus revision 1 – Group A Huanwen Qu, Jeroen Zuijderwijk, Rudy van Wandelen & Roy van den Broek.

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Presentation on theme: "Wait4Bus revision 1 – Group A Huanwen Qu, Jeroen Zuijderwijk, Rudy van Wandelen & Roy van den Broek."— Presentation transcript:

1 Wait4Bus revision 1 – Group A Huanwen Qu, Jeroen Zuijderwijk, Rudy van Wandelen & Roy van den Broek

2 The challenge Provide an initial specification, that: is high-level is maximally flexible is modular Our part focuses on the front-end and back-end parts

3 Three different set-ups Central server Bus contacts server, server contacts bus stands R&S-AS on the bus Bus contacts bus stands R&S-AS on the bus stands (p2p) Bus stand calls next bus stand

4 Central server R&SAS CONNEXXION / RELAY UNIT 2 M4 GPS UNIT LED Display CONNEXXION / RELAY UNIT 3 BUSSERVERBUS STAND M3 M1 CONNEX- XION / RELAY UNIT 2 M2

5 R&S-AS on the Bus R&SAS CONNEXXION / RELAY UNIT 2 M4 GPS UNIT LED Display CONNEXXION / RELAY UNIT 3 BUSBUS STAND M3 M1 CONNEX- XION / RELAY UNIT 2 M2

6 R&S-AS on the bus stands R&SAS CONNEXXION / RELAY UNIT 2 M4 GPS UNIT LED Display CONNEXXION / RELAY UNIT 3 BUSBUS STAND M3 M1 CONNEX- XION / RELAY UNIT 2 M2

7 Communication We defined communication as: messages sent from and to the different modules using the connexxion/relay unit A message consists of: coordinates time bus nr. arrival time send to address

8 GPS unit Input:none Output: Message m1, which contains: coordinates time bus nr. send to address Such that: the send to address is the location of the R&S-AS

9 Connexxion/relay unit 1 Input:A message m1 Output: A message m2 Such that: type m1 = type m2 m2 = m1 \ {Send To Address}

10 Route & Speed aware system Input: A message m2 Output: A message m3 Such that: m3 = m2 U {Arrival Time, Send To Address} Where the Arrival Time, and the Send To Address are determined by the R&S- AS

11 Connexxion/relay unit 2 Input:A message m3 Output: A message m4 Such that: type m4 = type m3 m4 = m3 \ {Send To Address}

12 Connexxion/relay unit 3 Input:A message m4 Output: Display Such that: display = (Arrival Time, Bus nr.)


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