US 2021/0345415 A1 · METHOD AND APPARATUS FOR CONTROLLING UPLINK TIME ALIGNMENT IN BROADBAND WIRELESS COMMUNICATION SYSTEM

Abstract

A communication technique for convergence of internet of things (IoT) technology, a fifth-generation (5G) communication system for supporting a higher data transfer rate beyond a fourth-generation (4G) system, and a system therefor are provided. The disclosure can be applied to intelligent services (e.g., smart homes, smart buildings, smart cities, smart or connected cars, health care, digital education, retail business, and services associated with security and safety) based on 5G communication technology and IoT-related technology. An embodiment relates to a method for controlling an uplink time alignment during execution of random access by a base station operating a broadband.

Claims16

Dependent claims

A method performed by a terminal in a communication system, the method comprising:

transmitting a random access preamble of random access procedure for requesting system information;
receiving a random access response message including timing advance (TA) information;
starting a timealignmenttimer timer related to the TA information;
transmitting a request message for requesting the system information based on the TA information;
receiving a response message as a response to the request message;
transmitting a hybrid automatic repeat request (HARQ) acknowledgment (ACK) for the response message;
and
stopping the timealignmenttimer timer after the transmission of the HARQ ACK.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application

17/373,004Filed 12 Jul 2021

Priority

KR 10-2018-005381910 May 2018

Published

4 Nov 2021

Term ends

Not estimatedThe source records don’t support an estimate.

Classification10 codes

H04W 74/0833
Non-scheduled access, e.g. ALOHA: random access procedures, e.g. with 4-step access
H04L 1/0005
By switching between different modulation schemes: applied to payload information
H04L 1/1819
Hybrid protocols; Hybrid automatic repeat request [HARQ]: with retransmission of additional or different redundancy
H04L 5/0055
Allocation of signalling, i.e. of overhead other than pilot signals: physical resource allocation for ACK/NACK

Method and apparatus for controlling uplink time alignment in broadband wireless communication system

Life of this patent

Method and apparatus for controlling uplink time alignment in broadband wireless communication system

Life of this patent

Abstract

Claims16