(19)

(11)

EP 4 740 350 A1

(12)

(43) Date of publication: 13.05.2026 Bulletin 2026/20 (21) Application number: 23944079.5 (22) Date of filing: 06.07.2023

(51) International Patent Classification (IPC):  H04L 5/00(2006.01) H04W 24/10(2009.01) (52) Cooperative Patent Classification (CPC): H04L 5/0048; H04L 5/0051; H04B 7/0626 (86) International application number: PCT/CN2023/106172 (87) International publication number: WO 2025/007352 (09.01.2025 Gazette 2025/02)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: KH MA MD TN (71) Applicant: NEC Corporation 108-8001 Tokyo (JP)	(72) Inventors: GUAN, Peng Beijing 100600 (CN) WANG, Gang Beijing 100600 (CN) GAO, Yukai Beijing 100600 (CN) (74) Representative: Mathys & Squire  32 London Bridge Street The Shard London SE1 9SG London SE1 9SG (GB)