In this paper, we present the design of a Constrained Application Protocol (CoAP) proxy able to interconnect Web applications based on Hypertext Transfer Protocol (HTTP) and WebSocket with CoAP based Wireless Sensor Networks. Sensor networks are commonly used to monitor and control physical objects or environments. Smart Cities represent applications of such a nature. Wireless Sensor Networks g...

With the current development of mobile devices, short range wireless communications have become more and more popular, and research on short range wireless communications, such as Bluetooth, has gained increasing interest, in industry as well as in academy. This paper analyzes capacity allocation issues in Bluetooth network as convex optimization problem. We formulate the problem of maximizing ...

In this paper, we study short-packet communications in multi-hop networks with wireless energy transfer, where relay nodes harvest from power beacons to transmit short packets multiple destinations. It is proposed a novel cooperative beamforming selection (CRS) scheme which incorporates partial and distributed multiuser achieve high-reliable transmission two consecutive hops. A closed-form expr...

In this article, we consider the massive nonorthogonal multiple access (NOMA) with a hybrid automatic repeat request (HARQ) for short packet communications. To reduce latency, each user can perform one retransmission provided that previous was not decoded successfully. The system performance is evaluated both coordinated and uncoordinated transmissions. We first develop Markov model (MM) to ana...

Rate-Splitting Multiple Access (RSMA) is an emerging flexible and powerful multiple access for downlink multi-antenna networks. In this paper, we introduce the concept of RSMA into short-packet communications. We design optimal linear precoders that maximize sum rate with Finite Blocklength (FBL) constraints. The relations between blocklength are investigated a wide range network loads user dep...

With the current development of mobile devices, short range wireless communications have become more and more popular, and many researches on short range wireless communications, such as Bluetooth, have gained special interests, in industry as well as in academy. This paper analyzes capacity allocation issues in Bluetooth network as convex optimization problem. We formulate the problem of maxim...

introduction: the nursing staff, compared to other professions, have less healthy work environment and always face a lot of job stress. the quality of the relationship between nurses and physicians has a significant impact on nurses. thus, the aim of the present study was to determine the correlation between job stress for nurses with professional communication between nurses and physicians. ma...