Iot sdk thesis

2 Literature Review ...................................................................................................... 12
 
2.1 Low-power Wide-area Networks ................................................................................... 12
 
2.2 Narrow-Band IoT (NB-IoT) ........................................................................................... 13
 
2.2.1 Overview ................................................................................................................. 13
 
2.2.2 NB-IoT Deployment ................................................................................................ 14
 
2.2.3 NB-IoT Applications ............................................................................................... 15
 
2.2.4 Role of NB-IoT in the Thesis .................................................................................. 16
 
2.3 IPSO Smart Objects ........................................................................................................ 17
 
2.3.1 Representation of the IPSO Object .......................................................................... 17
 
2.3.2 IPSO Object: Example of Temperature Sensor ....................................................... 18
 
2.3.3 Composite Objects ................................................................................................... 18
 
2.3.4 Role of IPSO in the Thesis ...................................................................................... 19
 
2.4 Constrained Application Protocol (CoAP) ..................................................................... 20
 
2.4.1 Messaging Model of CoAP ..................................................................................... 20
 
2.4.2 CoAP Message Format ............................................................................................ 22
 
2.4.3 Security in CoAP ..................................................................................................... 22
 
2.4.4 CoAP v/s HTTP ....................................................................................................... 23
 
2.5 Datagram Transport Layer Security (DTLS) .................................................................. 24
 

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2.5.1 Transport Layer Security (TLS) .............................................................................. 24
 
2.5.2 DTLS Overview ...................................................................................................... 27
 
2.5.3 Epoch ....................................................................................................................... 27
 
2.5.4 Sequence Number .................................................................................................... 27
 
2.5.5 DTLS Handshake [24] ............................................................................................. 28
 
2.5.6 Timeout and Retransmission ................................................................................... 29
 
2.5.7 DTLS: Role in Thesis .............................................................................................. 29
 
2.6 Light-weight Machine-to-Machine Protocol (LWM2M) ............................................... 31
 
2.6.1 Architecture and Protocol Stack .............................................................................. 31
 
2.6.2 Interfaces ................................................................................................................. 32
 
2.6.3 LWM2M: Role in Thesis ......................................................................................... 33