US 12,114,365 B2Granted

User apparatus, base station and communication system

AssigneeMitsubishi Electric Corporation

InventorsMitsuru Mochizuki, Tadahiro Shimoda, Noriyuki Fukui, Daichi Uchino

Life of this patent

Estimating the term…

Loading patent…

Abstract

A radio communication technology for enabling high reliability, a high transmission rate, and low power consumption 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 first transmitter-receiver to be newly connected, and establishes downlink synchronization with the at least one first transmitter-receiver by using the downlink synchronization signal. The communication terminal establishes uplink synchronization with the at least one first transmitter-receiver through random access processing.

Claims7

Dependent claims

A user apparatus in a communication system comprising the user apparatus;

and a plurality of base stations configured to wirelessly communicate with the user apparatus, the user apparatus comprising:
a processor communicating with the plurality of base stations,
wherein the plurality of base stations include a master node and a secondary node that support dual connectivity for the user apparatus,
the processor of the user apparatus receives from the master node Radio Resource Control (RRC) signaling including information related to usage of a split Signal Radio Bearer (SRB) or usage of an SRB3 in a procedure for adding or modifying the secondary node,
the processor of the user apparatus determines which of the split SRB and the SRB3 is configured,
in a case in which the split SRB is configured in a state of Master Cell Group (MCG) failure, the processor of the user apparatus transmits information related to the MCG failure to the master node via the secondary node using the split SRB, and receives an RRC Reconfiguration using the split SRB from the master node via the secondary node and
in a case in which the split SRB is not configured and the SRB3 is configured in a state of the MCG failure, the processor of the user apparatus transmits the information related to the MCG failure to the secondary node using the SRB3, and receives an RRC Reconfiguration from the secondary node using the SRB3.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/163,582Filed 2 Feb 2023 · continuation
Priority: JP 2018-1486217 Aug 2018
Published: US 2023/0180304 A18 Jun 2023
Granted: 8 Oct 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

H04W 76/34
Connection release: selective release of ongoing connections
H04W 56/0015
Synchronization between nodes: one node acting as a reference for the others
H04W 56/0045
Compensating for timing error of reception due to propagation delay: compensating for timing error by altering transmission time
H04W 74/006
Transmission of channel access control information: in the downlink, i.e. towards the terminal

Family

PCT/JP2019/030445Parent of this continuation · filed 2 Aug 2019
US 2023/0180304 A1Pre-grant publication · published 8 Jun 2023
Application17/259,782Parent of this continuation
US 2021/0153262 A1Published application
US 12,114,365 B2This patent

From the US filing history. Foreign family members aren’t listed.

Timeline

Citations

Open elsewhere

Building an agent or pulling many patents? Use the API or MCP server instead of scraping pages. Get an API key