US 11,606,764 B2Granted

Physical channel and method for transmitting and receiving signals in wireless communication system, and apparatus using the same

AssigneeWilus Institute of Standards and Technology Inc.

InventorsMinseok Noh, Kyungjun Choi, Jinsam Kwak

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Abstract

A base station in a wireless communication system is disclosed. Each base station in the wireless communication comprises: a communication module; and a processor. When the processor attempts to transmit a synchronization signal and PBCH block (SSB) at a SSB transmission candidate position in a discovery reference signal (DRS) transmission window, and fails to transmit an SSB at a first SSB transmission candidate location in a first DRS transmission window, the processor is configured to attempt to transmit the SSB at a second SSB transmission candidate position that is later than the first SSB transmission candidate position in the first DRS transmission window. The DRS transmission window is a time interval in which the base station can transmit the SSB. The SSB transmission candidate position indicates a time point at which the base station can start SSB transmission within the DRS transmission window.

Claims15

Dependent claims

A base station in a wireless communication system, the base station comprising:

a processor configured to:
attempt to transmit a synchronization signal and PBCH block (SSB) in SSB transmission candidate locations in a discovery reference signal (DRS) transmission window in unlicensed band,
when the base station fails to transmit the SSB in a first SSB transmission candidate location in a first DRS transmission window, attempt to transmit the SSB in a second SSB transmission candidate location, which is later than the first SSB transmission candidate location in the first DRS transmission window, and
when the base station succeeds in channel access before the first SSB transmission candidate location and transmits an SSB set comprising a plurality of SSBs within the first DRS transmission window, transmit a SSB mapped to each of at least one SSB transmission candidate location in each of the at least one SSB transmission candidate location in the first DRS transmission window, each of the plurality of SSBs is mapped to a respective one of a plurality of SSB transmission candidate locations included in the DRS transmission window,
wherein at least one orthogonal frequency division multiplexing (OFDM) symbol in which a transmission performed by the base station is restricted is set immediately before a boundary between a slot in which the transmission of SSB is performed and a slot subsequent to the slot in which the transmission of the SSB is performed,
wherein the DRS transmission window is a time interval in which the base station is able to transmit the SSB,
wherein the SSB transmission candidate location indicates a time point at which the base station is able to start transmitting the SSB within the DRS transmission window, and
wherein the maximum number of SSBs capable of being transmitted by the base station in the first DRS transmission window is limited.

5 more elements

A user equipment in a wireless communication system, the user equipment comprising:

a processor configured to:
attempt to receive a synchronization signal and PBCH block (SSB) in SSB transmission candidate locations in a discovery reference signal (DRS) transmission window,
when the user equipment fails to receive the SSB in a first SSB transmission candidate location in a first DRS transmission window, attempt to receive the SSB in a second SSB transmission candidate location, which is later than the first SSB transmission candidate location in the first DRS transmission window, and
when the user equipment receives an SSB set comprising a plurality of SSBs within the first DRS transmission window, receive a SSB mapped to each of the at least one SSB transmission candidate location in each of the at least one SSB transmission candidate location in the first DRS transmission window from the first SSB transmission candidate location, wherein each of the plurality of SSBs is mapped to a respective one of a plurality of SSB transmission candidate locations included in the DRS transmission window,
wherein at least one orthogonal frequency division multiplexing (OFDM) symbol in which a transmission performed by a base station is restricted is set immediately before a boundary between a slot in which the transmission of SSB is performed and a slot subsequent to the slot in which the transmission of the SSB is performed,
wherein the DRS transmission window is a time interval in which the base station is able to transmit the SSB, and
wherein the SSB transmission candidate location indicates a time point at which the user equipment is able to start the reception of the SSB within the DRS transmission window.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/262,160Filed 12 Aug 2019
Priority: KR 10-2018-009388410 Aug 2018
Published: US 2021/0297966 A123 Sep 2021
Granted: 14 Mar 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

H04L 27/2602
Multicarrier modulation systems: signal structure
H04W 56/001
Synchronisation arrangements: synchronization between nodes
H04J 11/0069
Orthogonal multiplex systems, e.g. using WALSH codes: cell search, i.e. determining cell identity [cell-ID]
H04L 5/0048
Arrangements for allocating sub-channels of the transmission path: allocation of pilot signals, i.e. of signals known to the receiver