205 200
206 201
207 202
208 203
209 204
210 205
211 206
212 207
213 208
214 209
215 210
216 211
217 212
218 213
219 214
220 215
221 216
222 217
223 218
224 219
225 220
226 221
227 222
228 223
229 224
230 225
231 226
232 227
233 228
234 229
235 230
236 231
237 232
238 233
239 234
240 235
241 237
242 238
243 239
244 240
245 241
246 242
247 243
248 244
249 245
250 246
251 247
252 248
253 249
254 250
255 251
256 252
257 253
258 254
259 255
260 256
261 257
262 258
263 259
264 260
265 261
266 263
267 264
268 265
269 266
270 267
271 268
272 269
273 270
274 271
275 272
276 273
NG-RAN and 5G-NR
5G Radio Access Network and Radio Interface
Frédéric Launay
First published 2021 in Great Britain and the United States by ISTE Ltd and John Wiley & Sons, Inc.
Apart from any fair dealing for the purposes of research or private study, or criticism or review, as permitted under the Copyright, Designs and Patents Act 1988, this publication may only be reproduced, stored or transmitted, in any form or by any means, with the prior permission in writing of the publishers, or in the case of reprographic reproduction in accordance with the terms and licenses issued by the CLA. Enquiries concerning reproduction outside these terms should be sent to the publishers at the undermentioned address:
ISTE Ltd
27-37 St George’s Road
London SW19 4EU
UK
John Wiley & Sons, Inc.
111 River Street
Hoboken, NJ 07030
USA
© ISTE Ltd 2021
The rights of Frédéric Launay to be identified as the author of this work have been asserted by him in accordance with the Copyright, Designs and Patents Act 1988.
Library of Congress Control Number: 2021935849
British Library Cataloguing-in-Publication Data
A CIP record for this book is available from the British Library
ISBN 978-1-78630-628-9
Preface
This book aims to describe the deployment of 5G-NSA and 5G-SA.
For the 5G-NSA mode, dual MR-DC connectivity is based on radio measurements allowing the master 4G base station MeNB to add or to remove a 5G secondary node SgNB.
For the 5G-SA mode, the mobile is attached to the 5G core network. Even though this book is devoted to the radio access network, the mobile registration, establishment procedures and re-establishment procedures are also explained.
This book describes the architecture of the NG radio access network and the 5G-NR radio interface according to 3GPP (3rd Generation Partnership Project) specifications.
The 5G-NR radio interface was introduced in Release 15 of the 3GPP standards.
The 5G-NR radio interface is the interface between the UE mobile (User Equipment) and the 5GC mobile network (5G Core).
Chapter 1 presents the 5G-NSA and the 5G-SA deployment architecture. It describes the radio access entities and functions of the 5G-SA core network and presents the functions supported by the radio access and the 5GC core network.
In order to prepare RAN virtualization, the radio protocols of the gNB entity are supported by two units: a centralized unit and a distributed unit. This separation creates new interfaces called F1 on the radio access.
Chapter 2 presents the interfaces between the entities of NG-RAN radio