1. Sreenivasa Reddy Yeduri, T. Uday, Sindhusha Jeeru, Abhinav Kumar, Ankit Dubey, and Linga Reddy Cenkeramaddi, “SIC-RSRA for Massive Machine-to-Machine Communications in 5G Cellular IoT,” IEEE Wireless Communications and Networking Conference (IEEE WCNC) 10–13 April 2022 // Austin, TX, USA.
Keywords:Performance evaluation,Energy consumption,Machine-to-machine communications,Interference cancellation,Costs,Closed-form solutions,5G mobile communication
Abstract:Inclusion of massive machine-type-communication (mMTC) devices in 5G cellular Internet of Things (IoT) has significantly raised the issue of network congestion. To address this challenge, a successive interference cancellation-rate splitting random access (SIC-RSRA) mechanism is proposed in this paper. Unlike traditional mechanisms, all selected mMTC devices are allowed to make a finite number of repeated message requests in randomly selected time slots within a radio frame. The gNodeB, on the other hand, applies both intra-slot SIC (utilizing RSRA) and inter-slot SIC to decode messages from a larger number of devices. For the proposed mechanism, the impact of increasing the number of devices as well as the received power difference is investigated. Through extensive simulations, we show that the proposed mechanism outperforms the other mechanisms in terms of number of RACH successes and number of supported devices.
More details:DOI: 10.1109/WCNC51071.2022.9771752
2. Akhileswar Chowdary, Garima Chopra, Abhinav Kumar, and Linga Reddy Cenkeramaddi, “Impact of NOMA and CoMP Implementation Order on the Performance of Ultra-Dense Networks,” IEEE Wireless Communications and Networking Conference (IEEE WCNC) 10–13 April 2022 // Austin, TX, USA.
Keywords:NOMA,Base stations,Spectral efficiency, System performance, Simulation, Conferences,Benchmark testing
Abstract:Non-orthogonal multiple access (NOMA) is a next-generation multiple access technology to improve users’ throughput and spectral efficiency for 5G and beyond cellular networks. Similarly, coordinated multi-point transmission and reception (CoMP) is an existing technology to improve the coverage of cell-edge users. Hence, NOMA with CoMP can potentially enhance the throughput and coverage of the users. However, the order of implementation of CoMP and NOMA can significantly impact the system performance of Ultra-dense networks (UDNs). Motivated by this, we study the performance of the CoMP and NOMA-based UDN by proposing two kinds of user grouping and pairing schemes that differ in the order in which CoMP and NOMA are performed for a group of users. Detailed simulation results are presented, comparing the proposed schemes with the state-of-the-art systems with varying user and base station densities. Through numerical results, we show that the proposed schemes can be used to achieve a suitable coverage-throughout trade-off in UDNs.
More details:DOI: 10.1109/WCNC51071.2022.9771552