New services and applications become part of our daily activities as we evolve into new solutions supported by cutting-edge paradigms, like the Internet of Things and Smart Cities. In order to properly achieve the benefits theoretically provided by these models, new kinds of services must be designed. These new services have special requirements, as well as the users that access to them. One of these requirements is low latency levels, since a delayed reply could render to chaos for applications such as eHealth and public safety. The communication infrastructure must cope with these challenges by offering innovative solutions. One of these solutions is a smart service placement system that facilitates the location of services in the proper position according to specific needs. On this paper, a service placement architecture for the Internet of Things is proposed, with especial emphasis in its main module, the Service Orchestrator, for which implementation details are provided, including a model for the service placement task. Furthermore, technologies to implement the modules from the architecture are suggested. This proposal, as well as its validation, is framed within the scope of the SusCity project.

Nowadays, technology is such an integral part of our lives that the dependency on its benefits is growing faster than ever. With the arrival of the paradigms of smart cities and the Internet of Things, citizens are able to improve their quality of life. Given that sensors and actuators deployed in smart cities usually have limited resources, today, it is a common practice to use cloud computing to extend the scope and benefits of smart cities. Taking into consideration that communication between applications and devices is vital for a good performance of services in a smart city, it is necessary to design new architectures and mechanisms to provide reliability in communications. A key aspect that has to be addressed by the new communications approaches is the possibility to recover the network and its services in case of faults, without human intervention. In this paper, a novel architecture to improve the resilience level of the infrastructure in the Internet of Things is proposed. Moreover, technologies to implement the components from the architecture are suggested. This proposal is discussed within the scope of the SusCity project.

Recent developments in telecommunications have allowed drawing new paradigms, including the Internet of Everything, to provide services by the interconnection of different physical devices enabling the exchange of data to enrich and automate people's daily activities; and Fog computing, which is an extension of the well-known Cloud computing, bringing tasks to the edge of the network exploiting characteristics such as lower latency, mobility support, and location awareness. Combining these paradigms opens a new set of possibilities for innovative services and applications; however, it also brings a new complex scenario that must be efficiently managed to properly fulfill the needs of the users. In this scenario, the Fog Orchestrator component is the key to coordinate the services in the middle of Cloud computing and Internet of Everything. In this paper, key challenges in the development of the Fog Orchestrator to support the Internet of Everything are identified, including how they affect the tasks that a Fog service Orchestrator should perform. Furthermore, different service Orchestrator architectures for the Fog are explored and analyzed in order to identify how the previously listed challenges are being tackled. Finally, a discussion about the open challenges, technological directions, and future of the research on this subject is presented.

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