US 11,109,330 B2Granted

Method for determining correction time in wireless communication system and apparatus therefor

AssigneeSamsung Electronics Co., Ltd.

InventorsHayoung Yang, Soongyoon Choi, Chongdon Kim

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Abstract

A method and apparatus is provided for determining, by a receiving end, a correction time value according to ranging access in a wireless communication system. A reception apparatus in a wireless communication system comprises a signal period selector for selecting a first detection time interval and a second detection time interval from a RACH signal for ranging access, the RACH signal including a RACH preamble sequence, a time offset detector for detecting a first time offset and a second time offset, each corresponding to a point of time when the preamble sequence is received, from the selected first detection time interval and the second detection time interval, respectively, and a time offset determiner for determining a correction time value for correcting a point of time when data is transmitted by a transmitting end in the wireless communication system, on the basis of the detected first time offset and the second time offset. This research was carried out with the support of “Pan-government Giga Korea Project” led by the Ministry of Science, ICT and Future Planning.

Claims11

Dependent claims

A reception apparatus in a wireless communication system, the reception apparatus comprising:

a transceiver;
and
at least one processor configured to:
select a first detection time interval and a second detection time interval for receiving a random access channel (RACH) signal including a RACH preamble sequence,
determine whether the RACH preamble sequence is detected in the first detection time interval or the RACH preamble sequence is detected in the second detection time interval,
when the RACH preamble sequence is detected in the second detection time interval, identify a second time offset based on a time point at which the RACH preamble sequence is received in the second detection time interval,
determine a correction time value for correcting a time point at which a transmission apparatus of the wireless communication system transmits data, based on the second time offset,
identify that the correction time value is greater than a predetermined value, and
determine a time advance (TA) value as the correction time value minus the predetermined value,
when the RACH preamble sequence is detected in the first detection time interval, identify a first time offset based on a time point at which the RACH preamble sequence is received in the first detection time interval, determine the correction time value for correcting the time point at which the transmission apparatus transmits data based on the first time offset, and determine the TA value as the correction time value, and
transmit, to the transmission apparatus via the transceiver, a single random access response (RAR) message including the determined TA value as a response to the RACH signal.

8 more elements

A method performed by a reception apparatus of a wireless communication system, the method comprising:

selecting a first detection time interval and a second detection time interval for receiving a random access channel (RACH) signal including a RACH preamble sequence;
determining whether the RACH preamble sequence is detected in the first detection time interval or the RACH preamble sequence is detected in the second detection time interval;
when the RACH preamble sequence is detected in the second detection time interval, identifying a second time offset based on a time point at which the RACH preamble sequence is received in the second detection time interval,
determining a correction time value for correcting a time point at which a transmission apparatus of the wireless communication system transmits data, based on the second time offset,
identifying that the correction time value is greater than a predetermined value, and
determining a time advance (TA) value as the correction time value minus a predetermined value;
when the RACH preamble sequence is detected in the first detection time interval, identifying a first time offset based on a time point at which the RACH preamble sequence is received in the first detection time interval, determining the correction time value for correcting the time point at which the transmission apparatus transmits data, based on the first time offset, and determining the TA value as the correction time value;
and
transmitting, to the transmission apparatus, a single random access response (RAR) message including the determined TA value as a response to the RACH signal.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/343,651Filed 14 Mar 2017
Priority: KR 10-2016-015021811 Nov 2016
Published: US 2019/0281564 A112 Sep 2019
Granted: 31 Aug 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

H04W 56/001
Synchronisation arrangements: synchronization between nodes
H04L 27/2605
Signal structure: symbol extensions, e.g. Zero Tail, Unique Word [UW]
H04W 56/00
Synchronisation arrangements
H04W 56/0045
Compensating for timing error of reception due to propagation delay: compensating for timing error by altering transmission time