Recent advances in antenna and RF circuit design have greatly reduced the crosstalk between transmitter receiver circuits on a wireless device, which enable radios to transmit receive same frequency at time. Such full duplex radio has potential double spectral efficiency of point-to-point link. However, application such current cellular systems (3GPP LTE) not been comprehensively analyzed. This article addresses fundamental challenges incorporating network unlock communications. We observe...

IAB is being considered as a means to reduce the deployment costs of ultra-dense 5G mmWave networks, using wireless backhaul links relay access traffic. In this work we describe most recent standardization activities on IAB, and compare architectures with without in deployments. While it well understood that networks by obviating need provide wired each cellular base station, still necessary validate performance realistic scenarios. article demonstrate cell edge throughput advantage offered...

This paper elaborates on the design challenges, opportunities, and solutions for New Radio-based access to Unlicensed spectrum (NR-U) by taking into account beam-based transmissions worldwide regulatory requirements. NR-U intends expand applicability of 5th generation Radio technology support operation in unlicensed bands adhering Listen-Before-Talk (LBT) requirements accessing channel. LBT was already adopted different variants 4th Long Term Evolution (LTE) spectrum, i.e., Licensed-Assisted...

Recent progress in single channel full-duplex (SC-FD) radio design [1]-[4] has attracted the attention of many researchers. A SC-FD transceiver is capable transmitting and receiving on same frequency at time, which will have a great impact performance current wireless networks that are based half duplex designs. This paper analyzes effects adopting enabled base stations cellular system with legacy mobile stations. We use multi-cell analytical model stochastic geometry to derive theoretical...

Recent advances in antenna and circuit design enable radios that operate full duplex mode on a single channel with very low residual self-interference. In this paper, the use of such wireless local area network (WLAN) is explored. Different scenarios which transmission can be exploited are studied. A distributed MAC based IEEE 802.11 DCF adopts to traffic conditions proposed. The proposed works for both ad hoc infrastructure modes WLAN takes into consideration new interference contention...

Recent progress in establishing the capability of radios to operate full duplex mode on a single channel has been attracting growing attention from many researchers. We extend this work by considering application small cells, particular resource-managed cellular systems similar TDD variant LTE. derive conditions where operation provides improved throughput compared half for cell scenario. present hybrid scheduler that defaults but can assign timeslots when it is advantageous do so. compare...

A physical layer (PHY) abstraction model estimates the PHY performance in system-level simulators to speed up simulations. This paper presents a for 5G New Radio (NR) and its integration into an open-source ns-3 based NR simulator. The capitalizes on exponential effective signal-to-interference-plus-noise ratio (SINR) mapping (EESM) considers latest specification. To generate it, we used NR-compliant link-level simulator calibrate EESM method as well obtain SINR-block error rate (BLER)...

Full-duplex (FD) communications has the potential to double capacity of a half-duplex (HD) system at link level. However, in cellular network, FD operation is not straightforward extension HD operations. The increased interference due large number simultaneous transmissions and real-time traffic conditions limits for improvement. Realizing requires careful coordination resource allocation among cells, as well within cell. In this paper, we propose distributed allocation, i.e., joint user...

The new frontier in cellular networks is harnessing the enormous spectrum available at millimeter wave (mmWave) frequencies above 28 GHz. challenging radio propagation characteristics these frequencies, and use of highly directional beamforming, lead to intermittent links between base station (BS) user equipment (UE). In this paper, we revisit problem cell selection maintain an acceptable level service, despite underlying link connectivity typical mmWave links. We propose a Markov Decision...

Joint communication and sensing allows the utilization of common spectral resources for localization, reducing cost deployment. By using fifth generation (5G) New Radio (NR) (i.e., 3rd Generation Partnership Project Access Network 5G) reference signals, conventionally used communication, this paper shows sub-meter precision localization is possible at millimeter wave frequencies. We derive geometric dilution a bistatic radar configuration, theoretical metric that characterizes how target...

Recent advances in self-interference cancellation enable radios to transmit and receive on the same frequency at time. Such a full duplex radio is being considered as potential candidate for next generation of wireless networks due its ability increase spectral efficiency systems. In this paper, performance small cellular systems analyzed by assuming capable base stations half user equipment. However, using only increases interference leading outage. We therefore propose mixed multi-cell...

Recently, the millimeter wave (mmWave) bands have been investigated as a means to support foreseen extreme data rate demands of next-generation cellular networks (5G). However, in order overcome severe isotropic path loss and harsh propagation experienced at such high frequencies, dense base station deployment is required, which may be infeasible because unavailability fiber drops provide wired backhauling. To address this challenge, 3GPP investigating concept Integrated Access Backhaul...

The 3GPP has standardized the 5G New Radio (NR) sidelink (SL) technology that enables direct device-to-device communications. SL will be key in realizing several high-speed, low-latency vehicle-to-everything (V2X) applications, such as automated driving. To meet these applications' high data rate requirements, operating at mmWave and sub-THz frequencies essential. However, current design primarily caters to sub-6 GHz does not consider directionality of transmissions frequencies. For Mode 2...

Full duplex (FD) communications has the potential to double capacity of a half (HD) system at link level. However, FD operation increases aggregate interference on each communication link, which limits improvement. In this paper, we investigate how much doubling can be practically achieved in resource-managed, small multi-cellular system, similar TDD variant LTE, both indoor and outdoor environments, assuming base stations (BSs) HD user equipment (UEs). We focus low-powered cellular systems,...

The approaching 5G era of cellular communications is posing stringent performance requirements. New groundbreaking applications can be enabled only by means multi-Gbps data rates and ultra-low latencies. spectrum scarcity at frequencies below 6 GHz stimulated a new wave wireless research that focuses on higher bands, namely mmWave. Directionality high penetration loss represent the key challenges when operating with such carriers. resulting intermittent connectivity makes user association...

The 5G New Radio (NR) access technology defines multiple numerologies to support a wide range of carrier frequencies, deployment scenarios, and variety use cases. In this paper, we consider resource allocation problem efficiently simultaneously. We assume frequency division multiplexing (FDM) in time duplex (TDD) system with self-contained slot format. focus on optimizing the numerology subband (SB) configuration, as well duplexing ratio between downlink (DL) uplink (UL) directions within...

In December 2019, the 3GPP defined road-map for Release-17, which includes new features on operation of New Radio (NR) in millimeter-wave bands with highly directional communications systems, i.e., up to 52.6 GHz. this paper, a system-level simulation based study coexistence NR-based access unlicensed spectrum (NR-U) and an IEEE technology, 802.11ad Wireless Gigabit (WiGig), at 60 GHz is conducted. For NR-U, extension NR Release-15 model used such that regulatory requirements are satisfied....

The high performance application processors found in today's hand held wireless and mobile computing products, such as smart phones tablet computers, require packages that can support demanding device dense form factor requirements. package architecture must enable the required signal routing, integrity, power delivery, physical factor, manufacturability cost. This paper reviews approach taken to design implement a on (PoP) enables integration of 32nm silicon node processor with dual channel...

Integrated Access and Backhaul (IAB) is being investigated as a means to overcome deployment costs of ultra-dense 5G millimeter wave (mmWave) networks by realizing wireless backhaul links relay the access traffic. For development these systems, however, it fundamental validate performance IAB in realistic scenarios through end-to-end system level simulations. In this paper, we shed light on most recent standardization activities IAB, compare architectures with without mmWave deployments....