The constrained application protocol (co ap) implementation-part5
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The document describes an out testing mechanism for underwater internet of things (UIoT) networks. It specifies the testing procedure and environment for implementing an out testing mechanism using CoAP and Java. The mechanism uses GET requests from a client and reliable message transmission over CON messages to test communication possibilities between nodes in a UIoT network.
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![Message format (2)
7
Data type Data transmission type (server) Receiving data type (client )
CON [MID=****], GET, /status, Token[TID=****]
MID-Message ID – TID - Token ID
Message Request Response
Formal CON [MID=1234], GET, /status,
Token=0x25
ACK [MID=1234], 2.05 Content,
Token=0x25
Source Code (Java) getRequestOptions() client.get().getResponseText();
Table-1. Reliable message transmission](https://image.slidesharecdn.com/theconstrainedapplicationprotocolcoap-implementationpart5-171223062553/85/The-constrained-application-protocol-co-ap-implementation-part5-7-320.jpg)
![A GET composed of CON message
to Request with a Separate Response
9
Data type
Data transmission type (server) Receiving data type (client )
CON [MID=****], GET, /status, Token[TID=****]
MID-Message ID – TID - Token ID – status – temperature
Message Request Response
Formal CON [MID=0x256], GET, /status, Token=0x25 ACK [MID=0x256]
[TIMEOUT]
Retransmit ACK [MID=0x256], Content, 22.9 C, Token=0x29 CON [MID=0x256], GET, /status, Token=0x29
Source Code (Java) getRequestOptions() client.get().getResponseText();
Table-4. CON request message is lost, and resent](https://image.slidesharecdn.com/theconstrainedapplicationprotocolcoap-implementationpart5-171223062553/85/The-constrained-application-protocol-co-ap-implementation-part5-9-320.jpg)
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1. An NMS refers to a collection of applications that enable network components to be monitored and controlled. NMS systems use a common architecture based on the OSI network management model, which defines manager, agent, and managed object components as well as information and communication models.
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- 1. Khamdamboy Urunov, a Ph.D. student. Special Communication Research Center., Graduate School of Financial Information Security., Kookmin University Specification of Out Testing mechanism for Underwater Internet of Things (UIoT) 1
- 2. Contents 1. Specification of Out Testing mechanism for Underwater Internet of Things (Specification document) 2. Implementation Out testing mechanism a. Server –Client (Socket Programming to for Server Socket technology) in Java b. IQ Out Test mechanism possibility 2
- 3. Out Test mechanism 3 Testing procedure: Out test is using checking process of communication possibility. Fig.1. Out Test mechanism
- 4. Out Test mechanism 4 Environment Resource directory Node(s) Development environment Operation System (OS) Windows 7; Windows 8.1; ~ Ubuntu 12.4 (Linux) Run environment Java 7 GCC Tool Eclipse GEdit Language Java C 1 The Implementation environment Out Test mechanism based on CoAP/U_CoAP protocol.
- 5. CoAP protocol 5 It can be fulfilling the requirements of constrained RESTful environments, which goes beyond a mere compression of HTTP. CoAP protocol using method is GET, POST, PUT, and DELETE. Out Test mechanism can implement using GET method based on Java and packet of Californium. Fig.2. CoAP protocol layer
- 6. Message format 6 Fig.3. Server-Client reliable message
- 7. Message format (2) 7 Data type Data transmission type (server) Receiving data type (client ) CON [MID=****], GET, /status, Token[TID=****] MID-Message ID – TID - Token ID Message Request Response Formal CON [MID=1234], GET, /status, Token=0x25 ACK [MID=1234], 2.05 Content, Token=0x25 Source Code (Java) getRequestOptions() client.get().getResponseText(); Table-1. Reliable message transmission
- 8. A GET composed of CON message to Request with a Separate Response 8 Fig.4: A GET composed of CON message to Request with a Separate Response
- 9. A GET composed of CON message to Request with a Separate Response 9 Data type Data transmission type (server) Receiving data type (client ) CON [MID=****], GET, /status, Token[TID=****] MID-Message ID – TID - Token ID – status – temperature Message Request Response Formal CON [MID=0x256], GET, /status, Token=0x25 ACK [MID=0x256] [TIMEOUT] Retransmit ACK [MID=0x256], Content, 22.9 C, Token=0x29 CON [MID=0x256], GET, /status, Token=0x29 Source Code (Java) getRequestOptions() client.get().getResponseText(); Table-4. CON request message is lost, and resent
- 10. Out Test mechanism message flows 10 Fig. 4. Out Test mechanism message primitive simplification
- 11. Implementation Out testing mechanism 11 1. Server part ready to connection client
- 12. Implementation Out testing mechanism (2) 12 2. Client part send to server data
- 13. 13 Implementation Out testing mechanism (3)
- 15. Thank you very much 15