IP Library › Granted Patent US 12,302,265
Granted Patent B2
US 12,302,265 · App. 17/266,875 · Granted May 13, 2025

User apparatus, base station, and communication system

Inventors: Toshiki Tanaka (Tokyo, JP); Tadahiro Shimoda (Tokyo, JP); Mitsuru Mochizuki (Tokyo, JP)
Assignee: Mitsubishi Electric Corporation
H04W56/001H04L1/1812H04W74/0833
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Quick Facts
Patent No.
US 12,302,265
App. No.
17/266,875
Granted
May 13, 2025
Kind
B2
Abstract

A radio communication technology with small delay is provided. A communication system includes a communication terminal and a base station. The base station includes a plurality of transmitter-receivers configured to perform radio communication with the communication terminal. The base station is configured to perform radio communication with the communication terminal by using a part or all of the plurality of transmitter-receivers. The communication terminal receives a downlink synchronization signal from at least one transmitter-receiver to be newly connected, and establishes downlink synchronization with the at least one transmitter-receiver by using the downlink synchronization signal. The communication terminal receives a random access start order from the base station, performs random access processing by using the random access start order, and establishes uplink synchronization with the at least one transmitter-receiver.

Claims (16)

1. A user apparatus in a communication system comprising the user apparatus and a base station including a plurality of transmission reception points (TRPs) configured to wirelessly communicate with the user apparatus, wherein

the user apparatus transmits a physical random access channel (PRACH) after a first time from physical downlink control channel (PDCCH) order reception, and a second time for switching a TRP of the TRPs is included in the first time,

the second time is a time related to detection of a Synchronization Signal Block,

the PDCCH order includes information indicating switching to the TRP being a new destination, and

the user apparatus adds the second time to the first time based on the information.

2. The user apparatus according to claim 1 , wherein the user apparatus transmits capability information including information related to the second time.

3. A base station in a communication system comprising a user apparatus and the base station including a plurality of transmission reception points (TRPs) configured to wirelessly communicate with the user apparatus, wherein

the user apparatus transmits a physical random access channel (PRACH) after a first time from physical downlink control channel (PDCCH) order reception, and a second time for switching a TRP of the TRPs is included in the first time,

the second time is a time related to detection of a Synchronization Signal Block,

the PDCCH order includes information indicating switching to the TRP being a new destination, and

the second time is added to the first time based on the information.

4. A communication system comprising: a user apparatus; and a base station including a plurality of transmission reception points (TRPs) configured to wirelessly communicate with the user apparatus, wherein

the user apparatus transmits a physical random access channel (PRACH) after a first time from physical downlink control channel (PDCCH) order reception, and a second time for switching a TRP of the TRPs is included in the first time,

the second time is a time related to detection of a Synchronization Signal Block,

the PDCCH order includes information indicating switching to the TRP being a new destination, and

the user apparatus adds the second time to the first time based on the information.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 8, 2021
From: TANAKA, TOSHIKI; SHIMODA, TADAHIRO; MOCHIZUKI, MITSURU
To: MITSUBISHI ELECTRIC CORPORATION
Reel/Frame 055184/0184 →
Priority Claims (1)
JP 2018-172661 · Sep 14, 2018 · national
Continuity (1)
Related Publication 20210297967A1 · Sep 23, 2021
References Cited (45)
US 20120314569A1 · Liu · 2012 [cited by examiner]
US 20180054832A1 · Luo · 2018 [cited by examiner]
US 20180059712A1 · Kazehaya · 2018 [cited by examiner]
US 20180083688A1 · Agiwal · 2018 [cited by examiner]
US 20180098358A1 · Rico Alvarino · 2018 [cited by examiner]
US 20190052331A1 · Chang · 2019 [cited by examiner]
US 20190313451A1 · Liu · 2019 [cited by examiner]
US 20190363843A1 · Gordaychik · 2019 [cited by examiner]
US 20210083748A1 · Guan · 2021 [cited by examiner]
US 20210153262A1 · Mochizuki et al. · 2021 [cited by applicant]
EP 3648529A1 · 2020 [cited by applicant]
EP 3651526A1 · 2020 [cited by applicant]
EP 3836651A1 · 2021 [cited by applicant]
WO WO2018070087A1 · 2018 [cited by applicant]
WO WO2018158926A1 · 2018 [cited by applicant]
Extended European Search Report issued May 4, 2022 in European Patent Application No. 19859435.0, 11 pages. [cited by applicant]
Indian Office Action issued Nov. 25, 2022, in Indian Patent Application No. 202147007757, 7 pages. [cited by applicant]
“CR to 38.213 capturing the RAN1#94 meeting agreements” 3GPP Draft, TSG RAN WG1 Meeting #94, R1-1810020, Sep. 6, 2018, 96 pages. [cited by applicant]
“LTE; Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (3GPP TS 36.300 version 15.2.0 Release 15),” ETSI TS 136 300 V15.2… [cited by applicant]
“LS on HNB/HeNB Open Access Mode,” 3GPP TSG-SA1 #42, Oct. 13-17, 2008, S1-083461 total pp. 2. [cited by applicant]
“3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); Further advancements for E-UTRA physical layer aspects (Release 9),” 3GPP TR … [cited by applicant]
“LTE; Feasibility study for Further Advancements for E-UTRA (LTE-Advanced) (3GPP TR 36.912 version 15.0.0 Release 15),” ETSI TR 136 912 V15.0.0, Jul. 2018, total pp. 63. [cited by applicant]
“Scenarios, requirements and KPIs for 5G mobile and wireless system,” Mobile and wireless communications Enablers for the Twenty-twenty Information Society (METIS), Apr. 4, 2014, total pp. 84. [cited by applicant]
“3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; Study on Architecture for Next Generation System (Release 14),” 3GPP TR 23.799 V14.0.0, Dec. 2016, total pp. 522. [cited by applicant]
“3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Study on new radio access technology: Radio access architecture and interfaces (Release 14),” 3GPP TR 38.801 V14.0.0, Mar. 2017, t… [cited by applicant]
“3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Study on New Radio Access Technology Physical Layer Aspects (Release 14),” 3GPP Tr 38.802 V14.2.0, Sep. 2017, total pp. 144. [cited by applicant]
“3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Study on New Radio Access Technology; Radio Interface Protocol Aspects (Release 14),” 3GPP TR 38.804 V14.0.0, Mar. 2017, total pp.… [cited by applicant]
“3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Study on New Radio (NR) access technology (Release 14),” 3GPP TR 38.912, Jun. 2017, total pp. 74. [cited by applicant]
“Work Item on New Radio (NR) Access Technology,” 3GPP TSG RAN Meeting #77, Sep. 11-14, 2017, RP-172115, total pp. 47. [cited by applicant]
“3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA) and NR; Multi-connectivity; Stage 2 (Release 15),” 3GPP TS 37.340 V15.2.0, Jun… [cited by applicant]
“3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Physical channels and modulation (Release 15),” 3GPP TS 38.211 V15.2.0, Jun. 2018, total pp. 93. [cited by applicant]
“3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Physical layer procedures for control (Release 15),” 3GPP TS 38.213 V15.2.0, Jun. 2018, total pp. 98. [cited by applicant]
“3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Physical layer procedures for data (Release 15),” 3GPP TS 38.214 V15.2.0, Jun. 2018, total pp. 95. [cited by applicant]
“3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; NR and NG-RAN Overall Description; Stage 2 (Release 15),” 3GPP TS 38.300 V15.2.0, Jun. 2018, total pp. 87. [cited by applicant]
“3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Medium Access Control (MAC) protocol specification (Release 15),” 3GPP TS 38.321 V15.2.0, Jun. 2018, total pp. 73. [cited by applicant]
“3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Multiplexing and channel coding (Release 15),” 3GPP TS 38.212 V15.2.0, Jun. 2018, total pp. 94. [cited by applicant]
“5g Architecture Options—Full Set,” Joint Ran/SA Meeting, Jun. 14, 2016, RP-161266, total pp. 11. [cited by applicant]
“Enhancements on MIMO for NR,” 3GPP TSG RAN Meeting #80, Jun. 11-14, 2018, RP-181453, total pp. 6. [cited by applicant]
“Summary of Remaining Details on RACH Procedure,” 3GPP TSG-RAN WG1 93, May 21-25, 2018, R1-1807633, total pp. 22. [cited by applicant]
“3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification (Release 15),” 3GPP TS 3… [cited by applicant]
“Views on multi-panel/TRP MIMO transmission,” 3GPP TSG RAN WG1 Meeting #94b, Oct. 8-12, 2018, R1-1811483, total pp. 6. [cited by applicant]
International Search Report issued on Oct. 15, 2019 in PCT/JP2019/035302 filed on Sep. 9, 2019, 2 pages. [cited by applicant]
Combined Chinese Office Action and Search Report issued Nov. 8, 2023 in Chinese Application 201980058910.6, (with unedited computer-generated English translation), 19 pages. [cited by applicant]
Extended European Search Report Issued Nov. 20, 2023 in European Application 23195950.3, 12 pages. [cited by applicant]
Japanese Office Action issued on Aug. 22, 2023 in Japanese Patent Application No. 2020-545999 (with English translation), 8 pages. [cited by applicant]