Method, device, and system for transmitting signals in unlicensed band

Patent metadata

Field	Value
Publication number	US-2018249497-A1
Application number	US-201815968688-A
Country	US
Kind code	A1
Filing date	May 1, 2018
Priority date	Nov 4, 2015
Publication date	Aug 30, 2018
Grant date	—

Abstract

A method, a device, and a system for transmitting a downlink signal is provided. The method includes monitoring a first common control channel indicating a downlink (DL) interval of subframe (SF) #(n−1) and SF #n, monitoring a second common control channel indicating a DL interval of SF #n and SF #(n+1), and performing a DL reception process in the SF #n based on a detection result of the first common control channel and a detection result of second common control channel. The DL interval represents occupied OFDM symbols in a DL subframe.

First claim

1 . A method for a user equipment to receive a downlink signal in a cellular communication system, the method comprising:
monitoring a first common control channel indicating a downlink (DL) interval of subframe (SF) #(n−1) and SF #n; monitoring a second common control channel indicating a DL interval of SF #n and SF #(n+1); and performing a DL reception process in the SF #n based on a detection result of the first common control channel and a detection result of the second common control channel, wherein only a detection process for a first physical channel/signal is allowed in the DL reception process in SF #n when a detection of the first common control channel fails, a detection of the second common control channel is successful, and the DL interval of SF #n indicated by the second common control channel is a part of a total orthogonal frequency division multiplexing (OFDM) symbols of SF #n, wherein the first physical channel/signal comprises a Discovery Reference Signal (DRS), wherein the DL interval represents occupied OFDM symbols in a DL subframe.

2 . The method of claim 1 ,
wherein a reception process for a second physical channel/signal is omitted in the DL reception process in SF #n when the detection of the first common control channel fails, the detection of the second common control channel is successful, and the DL interval of SF #n indicated by the second common control channel is a part of the total OFDM symbols of SF #n, wherein the second physical channel/signal does not comprise the DRS.

3 . The method of claim 2 , wherein the second physical channel/signal comprises a Physical Downlink Control Channel (PDCCH), an Enhanced PDCCH (EPDCCH), and a Physical Downlink Shared Channel (PDSCH) for downlink transmission.

4 . The method of claim 1 , wherein the first physical channel/signal comprises a PDCCH for uplink (UL) transmission.

5 . The method of claim 1 , wherein the first common control channel is monitored in SF #(n−1), and the second common control channel is monitored in SF #n.

6 . The method of claim 5 , wherein SF #n is comprised in a time window expecting DRS reception.

7 . The method of claim 6 , wherein the time window expecting the DRS reception comprises a DRS Measurement Timing configuration (DMTC).

8 . The method of claim 7 , wherein the DMTC is configured in a cell of an unlicensed band.

9 . The method of claim 1 , wherein the first and the second common control channels comprise a Physical Downlink Control Channel (PDCCH) scrambled with a Cyclic Redundancy Check (CRC) by a Common Control Radio Network Temporary Identifier (CC-RNTI).

10 . A user equipment used in a cellular wireless communication system, the user equipment comprising:
a wireless communication module; and a processor, wherein the processor is configured to monitor a first common control channel indicating a downlink (DL) interval of subframe (SF) #(n−1) and SF #n; monitor a second common control channel indicating a DL interval of SF #n and SF #(n+1); and perform a DL reception process in the SF #n based on the detection a result of the first common control channel and a result of the detection of result of second common control channel, wherein only a detection process for a first physical channel/signal is allowed in the DL reception process in SF #n, when the detection of the first common control channel fails, the detection of the second common control channel is successful, and the DL interval of SF #n indicated by the second common control channel is a part of a total orthogonal frequency division multiplexing (OFDM) symbols of SF #n, wherein the first physical channel/signal comprises a Discovery Reference Signal (DRS), wherein the DL interval represents occupied OFDM symbols in a DL subframe.

11 . The user equipment of claim 10 ,
wherein a reception process for a second physical channel/signal is omitted in the DL reception process in SF #n when the detection of the first common control channel fails, the detection of the second common control channel is successful, and the DL interval of SF #n indicated by the second common control channel is a part of the total OFDM symbols of SF #n, wherein the second physical channel/signal does not comprise the DRS.

12 . The user equipment of claim 11 , wherein the second physical channel/signal comprises a Physical Downlink Control Channel (PDCCH), an Enhanced PDCCH (EPDCCH), and a Physical Downlink Shared Channel (PDSCH) for downlink transmission.

13 . The user equipment of claim 10 , wherein the first physical channel/signal comprises a PDCCH for uplink (UL) transmission.

14 . The user equipment of claim 10 , wherein the first common control channel is monitored in SF #(n−1), and the second common control channel is monitored in SF #n.

15 . The user equipment of claim 14 , wherein SF #n is comprised in a time window expecting DRS reception.

16 . The user equipment of claim 15 , wherein the time window expecting the DRS reception comprises a DRS Measurement Timing configuration (DMTC).

17 . The user equipment of claim 16 , wherein the DMTC is configured in a cell of an unlicensed band.

18 . The user equipment of claim 10 , wherein the first common control channel and the second common control channel comprise a Physical Downlink Control Channel (PDCCH) scrambled with a Cyclic Redundancy Check (CRC) by a Common Control Radio Network Temporary Identifier (CC-RNTI).

Assignees

• Wilus Inst Standards & Tech Inc

Inventors

• Noh Minseok
• Kwak Jinsam
• Son Juhyung

Classifications

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04L5/001

  the frequencies being arranged in component carriers · CPC title

• H04W74/0808

  using carrier sensing, e.g. carrier sense multiple access [CSMA] · CPC title

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W16/14

  Spectrum sharing arrangements {between different networks} · CPC title