Blocking analysis of persistent resource allocations for M2M applications in wireless systems

Wide area wireless systems conventionally employ dynamic scheduling for stochastic or bursty applications and persistent resource allocations of a given period for deterministic applications such as voice. When considering persistent resource allocations for machine-to-machine (M2M) applications from different markets, a wide range of allocation periods may be required to fully support the diversity of applications. The set of periods supported by the wireless system is a compromise between efficient use of the available resources and supporting as many M2M applications as possible. We consider two schemes: a simply periodic system which offers a limited set of periods with very efficient use of resources, and a complex periodic system which offers a wider range of periods at the cost of lower efficiency. We derive formulae for the blocking probability of these two systems by considering different resource sharing policies of the Erlang Multirate Loss Model (EMLM) and the concepts of packing (when a new persistent allocation is admitted to the system) and repacking (when an existing persistent allocation leaves the system). The theoretical models are verified using a discrete event simulation with variable offered traffic loads. The concepts discussed in this paper are generic, but may find particular application in Long Term Evolution (LTE) and Worldwide Interoperability for Microwave Access (WiMAX) networks for the purposes of system configuration (particularly in terms of the set of periods supported for persistent allocations), resource dimensioning and system performance characterisation

Analysis of Indoor Solutions for Provision of Indoor Coverage at 3.5 GHz and 28 GHz for 5G System

| openaire: EC/H2020/815191/EU//PriMO-5GThe 5th Generation (5G) wireless networks are envisioned to support emerging bandwidth-hungry applications. Millimeter wave (mmWave) communication has been considered as a promising solution for future capacity crunch due to large available bandwidth. However, an outdoor macrocellular layer lacks the capability of providing an adequate coverage to indoor users, especially at higher frequencies i.e. 28 GHz. Therefore, the provision of high data rates and high system capacity in an indoor environment requires a separate indoor solution. The main target of this paper is to analyze the performance of Ultra Dense Network (UDN) and Distributed Antenna System (DAS) deployment in an indoor (university office) environment at 1.8 GHz, 2.6 GHz, 3.5 GHz and 28 GHz frequency. This research work is conducted by performing a ray tracing simulation using a three dimensional floor plan. The obtained results show that the existing indoor solutions which are in operation at 2.6 GHz can be reused at 3.5 GHz frequency with minor power adjustment, or by using antennas with little higher gain. However, the operation at 28 GHz requires a new plan for providing good indoor coverage. Acquired results show that DAS improves the cell capacity by reducing the interference. However, the UDN provides a higher system capacity due to more number of cells. The real gain of operation at 28 GHz can only be achieved by using larger system bandwidth e.g 200 MHz band.Peer reviewe