Lean Beam Management for New Radio
(2020) EITM02 20201Department of Electrical and Information Technology
- Abstract
- The use of millimetre-wave frequencies in Fifth generation New Radio has lead to high path loss due to radio propagation environment. Simultaneously, high data rates is a must for current products due to high market demand. This requirement accounts for efficient tracking of the best beam for the user equipment to stay connected to it. Current products at Ericsson use such methods of beam management. These methods call for regular measurements of beams which add up to overhead. Overhead reduction is an area that is being continuously researched. Through this thesis, two algorithms are proposed with the aim to reduce overhead. First, by increasing the periodicity of measurements. Second, by reducing the number of narrow beam measurements.... (More)
- The use of millimetre-wave frequencies in Fifth generation New Radio has lead to high path loss due to radio propagation environment. Simultaneously, high data rates is a must for current products due to high market demand. This requirement accounts for efficient tracking of the best beam for the user equipment to stay connected to it. Current products at Ericsson use such methods of beam management. These methods call for regular measurements of beams which add up to overhead. Overhead reduction is an area that is being continuously researched. Through this thesis, two algorithms are proposed with the aim to reduce overhead. First, by increasing the periodicity of measurements. Second, by reducing the number of narrow beam measurements. These solutions are simulated by comparing overall system throughput values from a selection of beams. Theoretical calculations have also been done. Both these results are compared to see the effectiveness of the proposed solutions. Different use cases are taken into consideration such as
stationary and/or mobile users. In review, it can be clearly seen that increasing periodicity of channel sounding is a good way to decrease measurements and use the resources for data instead. However, reducing narrow beam measurements was not found to be an overall feasible algorithm as the system performance was poor for uplink leading to degradation in downlink. Thus, increasing periodicity for channel estimation in downlink can be applied to New Radio beam management scenarios in millimetre-wave high-band to yield better average cell downlink throughput as compared to current products. (Less) - Popular Abstract
- In this modern epoch, demand and growth of high-speed mobile broadband has been surging at never seen before pace. Hence primarily, it is need for tetherless communication with high data rates which has led to need of migration from Fourth generation to Fifth generation of mobile communication rather than voice calls. This leads to need for large radio bandwidth. Large bandwidth further leads to use of millimeter wave spectrum to achieve better power efficiency. Need for better bandwidth efficiency leads to use of phased array antenna modules or massive multiple input multiple output antenna system. The base station has multiple antennas in Fifth generation New Radio. Despite availability of many antennas, the base station is equipped only... (More)
- In this modern epoch, demand and growth of high-speed mobile broadband has been surging at never seen before pace. Hence primarily, it is need for tetherless communication with high data rates which has led to need of migration from Fourth generation to Fifth generation of mobile communication rather than voice calls. This leads to need for large radio bandwidth. Large bandwidth further leads to use of millimeter wave spectrum to achieve better power efficiency. Need for better bandwidth efficiency leads to use of phased array antenna modules or massive multiple input multiple output antenna system. The base station has multiple antennas in Fifth generation New Radio. Despite availability of many antennas, the base station is equipped only with a fixed set of steering vectors. These are called beams in New Radio. Each beam is pointing in a certain direction in space. To cover multiple user equipment in a single transmission is almost impossible when the radiation is beam shaped unless they are in very close proximity.
Fifth generation New Radio is the new radio access technology developed by the 3rd Generation Partnership Project for mobile communication network. It is the global standard for the air interface of Fifth generation networks. Analog beamforming is a technique used widely in Fifth generation New Radio Access Network to counter propagation effects between transmitter and receiver. In analog beamforming, connected devices are individually tracked so that the communication with each device takes place on the best beam. This is called beam management. Beam management comes with an additional cost. For radio access network to track the device and use the best beam, devices must perform regular measurements called channel sounding and estimation and report them to the base station of the mobile network system. Hence, these measurements consume air interface resources which are costly and scarce given the high traffic volume and could otherwise be used for data. The challenge increases with increase in the number of connected users in a cell.
The thesis aims to investigate current implementation of downlink beam management in New Radio high-band and propose better suggestions to minimise these measurements while still achieving decent throughput and coverage with reduced interference. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/9027204
- author
- Kumar, Nawanit LU
- supervisor
-
- Stefan Höst LU
- organization
- course
- EITM02 20201
- year
- 2020
- type
- H2 - Master's Degree (Two Years)
- subject
- keywords
- 5G, NR, MIMO, Beam management, CSI-RS
- report number
- LU/LTH-EIT 2020-785
- language
- English
- id
- 9027204
- date added to LUP
- 2020-09-01 13:40:37
- date last changed
- 2020-09-01 13:40:37
@misc{9027204,
abstract = {{The use of millimetre-wave frequencies in Fifth generation New Radio has lead to high path loss due to radio propagation environment. Simultaneously, high data rates is a must for current products due to high market demand. This requirement accounts for efficient tracking of the best beam for the user equipment to stay connected to it. Current products at Ericsson use such methods of beam management. These methods call for regular measurements of beams which add up to overhead. Overhead reduction is an area that is being continuously researched. Through this thesis, two algorithms are proposed with the aim to reduce overhead. First, by increasing the periodicity of measurements. Second, by reducing the number of narrow beam measurements. These solutions are simulated by comparing overall system throughput values from a selection of beams. Theoretical calculations have also been done. Both these results are compared to see the effectiveness of the proposed solutions. Different use cases are taken into consideration such as
stationary and/or mobile users. In review, it can be clearly seen that increasing periodicity of channel sounding is a good way to decrease measurements and use the resources for data instead. However, reducing narrow beam measurements was not found to be an overall feasible algorithm as the system performance was poor for uplink leading to degradation in downlink. Thus, increasing periodicity for channel estimation in downlink can be applied to New Radio beam management scenarios in millimetre-wave high-band to yield better average cell downlink throughput as compared to current products.}},
author = {{Kumar, Nawanit}},
language = {{eng}},
note = {{Student Paper}},
title = {{Lean Beam Management for New Radio}},
year = {{2020}},
}