Method and device for performing channel access process for transmitting different types of signals in wireless access system supporting unlicensed band

• US 10,219,287 B2
• Filed: 05/12/2016
• Issued: 02/26/2019
• Est. Priority Date: 05/12/2015
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Seonwook, Ahn, Joonkui, Yang, Suckchel, Kim, Kijun, Kim, Byounghoon, Seo, Hanbyul, Park, Hanjun, Hwang, Daesung
• Primary Examiner(s): Mew, Kevin D
• Application Number:
  US15/573,456
• Publication Number:
  US 20180115981A1
• Time in Patent Office: 1,020 Days
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/18 Automatic repetition systems, e.g. Van Duuren systems
• CPC Class Codes: H04L 1/187 Details of sliding window management
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0087 when data requirements change
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 72/1215 for collaboration of different radio technologies
• CPC Class Codes: H04W 74/002 Transmission of channel access control information
• CPC Class Codes: H04W 74/0808 using carrier sensing, e.g. carrier sense multiple access [CSMA]
• CPC Class Codes: H04W 76/28 Discontinuous transmission [DTX]; Discontinuous reception [DRX]
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

The present invention relates to a wireless access system supporting an unlicensed band and provides methods for performing a channel access process for transmitting different types of signals, and devices supporting the same. According to one embodiment of the present invention, a method for transmitting different types of signals in a wireless access system supporting an unlicensed band can comprise the steps of: performing a first channel process (CAP) for transmitting a first type of signal; and transmitting a transmission burst including the first type of signal through the unlicensed band if it is determined that a serving cell (SCell) of the unlicensed band is in an idle state after performing the first CAP. At this time, at least one of first parameters for performing the first CAP can be set to be value less than that of second parameters for performing a second CAP for transmitting a second type of signal.

Claims

1. A method for transmitting different types of signals in a wireless access system supporting an unlicensed band, the method comprising:

performing a first channel access procedure (CAP) for transmitting a first type of signal; and

transmitting a transmission burst including the first type of signal when a serving cell (SCell) of the unlicensed band is determined as an idle mode after performing the first CAP,

wherein at least one of first parameters for performing the first CAP is set to a smaller value than second parameters for performing a second CAP.

2. The method according to claim 1, wherein the first type of signal is an uplink grant signal, and the transmission burst does not include any other type of signal.

3. The method according to claim 2, wherein the first type of signal is used for self-carrier scheduling.

4. The method according to claim 2, wherein the second type of signal includes a data signal.

5. The method according to claim 2, wherein the first parameters are determined to be parameters for a specific channel access priority class.

6. The method according to claim 1, wherein the first parameters or the second parameters include at least two of a slot length parameter indicating a slot length during which an initial CAP is performed, a defer period parameter indicating a length of a defer period, a slot length parameter indicating a slot length during which an extended CAP is performed, a parameter indicating a minimum contention window size, and a parameter indicating a maximum contention window size.

7. A transmission node for transmitting different types of signals in a wireless access system supporting an unlicensed band, the transmission node comprising:

a transmitter;

a receiver; and

a processor configured to transmit the different types of signals,

wherein the processor is configured to perform a first channel access procedure (CAP) for transmitting a first type of signal by controlling the transmitter and the receiver, and to transmit a transmission burst including the first type of signal, when a serving cell (SCell) of the unlicensed band is determined as an idle mode after performing the first CAP by controlling the transmitter, and

wherein at least one of first parameters for performing the first CAP is set to a smaller value than second parameters for performing a second CAP.

8. The transmission node according to claim 7, wherein the first type of signal is an uplink grant signal, and the transmission burst does not include any other type of signal.

9. The transmission node according to claim 8, wherein the first type of signal is used for self-carrier scheduling.

10. The transmission node according to claim 8, wherein the second type of signal includes a data signal.

11. The transmission node according to claim 8, wherein the first parameters are determined to be parameters for a specific channel access priority class.

12. The transmission node according to claim 7, wherein the first parameters or the second parameters include at least two of a slot length parameter indicating a slot length during which an initial CAP is performed, a defer period parameter indicating a length of a defer period, a slot length parameter indicating a slot length during which an extended CAP is performed, a parameter indicating a minimum contention window size, and a parameter indicating a maximum contention window size.