Abstract
Unlike the IP-address-centric network, heterogeneous devices in the information-centric Internet of Things (IC-IoT) have heterogeneous quality of service (QoS) requirements. Employing sleeping technology in IC-IoT while satisfying the heterogeneous QoS requirements for IoT devices is challenging. In this paper, considering the IoT devices’ heterogeneous QoS requirements, we investigate a sleeping capacity maximizing problem in IC-IoT. First, a content-based heterogeneous network architecture is proposed to empower IC-IoT and decouple the heterogeneous content transmission functions. Specifically, macro base stations (MBSs) are used to guarantee the control coverage and transmit the low QoS requirement services, whereas small base stations (SBSs) are utilized to transmit the high QoS requirement services. The QoS requirement levels are differentiated by the outage constraints which are related to the achievable data rate. Then, an optimization problem is formulated to maximize the sleeping probability and available bandwidth while the outage probability and achievable data rate constraints are guaranteed. In the formulated optimization problem, sleeping probability plays the roles of both an optimization variable and an optimization objective, which makes the optimization problem challenging to be solved. In order to decouple sleeping probability from the optimization values, we first analyze the parameters related to the sleeping probability and the available bandwidth and then propose a bisection-based nonlinear programming algorithm. This algorithm divides the original problem into two subproblems. One is related to the bandwidth reallocation. The other one involves obtaining the optimal sleeping probability. Last but not least, analytical results are concluded due to the simulation results, which indicate the following facts: 1) optimal sleeping probability is linear to the available bandwidth, and inversely proportional to the devices’ density, and; 2) sleeping probability is more sensitive to the changes of channel quality than those of QoS provision.
Highlights
INTRODUCTIONThere are billions of heterogeneous devices (or things) providing global accesses to services and information [1]
There are billions of heterogeneous devices providing global accesses to services and information [1]
In order to get the maximum sleeping capacity of this network, an optimization problem is formulated which aims to maximize the sleeping probability and the available bandwidth, where the heterogeneous quality of service (QoS) requirements of Internet of things (IoT) user equipments (UEs) are taken into account
Summary
There are billions of heterogeneous devices (or things) providing global accesses to services and information [1]. Few researches put attentions on sleeping technology in IC-IoT Motivated by this gap, in this paper, we propose a content-based heterogeneous network architecture. To provided deterministic and heterogeneous services for various devices in IC-IoT, a content-based heterogeneous network architecture is proposed Under such an architecture, the macro base station layer (MBSlayer) is responsible for the low QoS requirement services transmission and receiving offloaded traffic from small base station (SBSs) which are covered by the SBS-layer. The controller integrates and reallocates the available bandwidth resources in the network, considering the heterogeneous devices’ QoS requirements. The controller integrates the available bandwidth in the network and reallocates it to MBS-layer and SBS-layer as the following steps, which is shown as Fig. 3. The operation of sleeping and offloading must ensure that the QoS requirements of MUEs, SUEs and offloaded IoT UEs are coincident before and after offloading and sleeping
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
