## 5 IETF ROLL Working Group
### Leveraging Upon CoAP to Realize the IoT
#### 6.3.8 Real Life Use Cases of CoAP in the IoT  
Some recent publications show that CoAP is being considered as a good candidate to solve current issues in real life application of the IoT. For example, [110] presents an IP based solution to integrate sensor networks used in a cargo container with existing logistic processes, highlighting the use of CoAP for the retrieval of sensor data during land or sea transportation.  
[PERSON] _et al_. [134] propose an IoT architecture where the infrastructure is agnostic of applications and application development is fully decoupled from the embedded domain. This is achieved by creating a common application layer that fosters the development of novel applications. The application logic of devices is running on application servers, while thin servers embedded into devices export only their elementary functionality using CoAP resources.  
GlobalPlatform is a cross industry not-for-profit association which publishes specifications facilitating the secure and interoperable deployment and management of multiple embedded applications on secure chip technology. According to a recent presentation [135], GlobalPlatform is considering the use of CoAP for the management of secure environments and other aspects covered by GlobalPlatform standards.  
[PERSON] _et al_. [136] present how the IoT is integrated for improving terrestrial logistics offering a comprehensive and flexible architecture, with high scalability, according to the specific needs for reaching an item-level continuous monitoring solution. CoAP is used here to provide tracking and monitoring services at any time during the transportation of goods. The solution makes use of observe and blockwise transfer options to optimize data transfers.  
Optimizing energy policies requires monitoring, analyzing, and controlling of power consumption. Smart metering is an emerging topic for realizing such modern energy policies. In this field a large number of proprietary and open standards for communication (with low or no interoperability to each other) exist today. Therefore, it is very difficult to integrate multi-vendor solutions using one sustainable holistic approach. To this end the authors of [35] propose to use Web Service technology as an open widespread Internet standard for the creation of a heterogeneous network for smart metering devices. This work uses CoAP over TCP transport instead of using it over UDP, which is still not specified in the current CoAP drafts. Nevertheless, traffic overhead was reduced by over 90% by using CoAP instead of HTTP and EXI for XML binary encoding.  
Using CoAP and _REsource LOcation And Discovery_ (RELOAD), [137] proposes a new architecture for wide area sensor and actuator networking. RELOAD is a P2P signaling protocol for use on the Internet that is currently being standardized by the IETF. The architecture provides a decentralized peer-to-peer rendezvous service for CoAP nodes in WSNs and enables a P2P federation of geographically distributed WSNs. This is achieved by the use of proxy nodes that are part of the WSN but also connect to a RELOAD overlay network via cellular Internet access. The authors conclude that such architecture is most beneficial for large-scale networks having from moderate to high levels of interdevice communication.  
[PERSON] _et al_. [138] present a smart object gateway architecture that allows for efficient service delivery between the Smart Object and an endpoint on the Internet such as an application server. A survey of some other examples of how CoAP is been used to realize the IoT can be found in [139].