# US 11,451,968 B2 · Method for transmitting and receiving discovery burst in shared band

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- Number: US 11,451,968 B2
- Document ID: US11451968B2
- Status: Granted
- Kind: B2
- Application number: 16/879,747
- Filed: 2020-05-20
- Published: 2020-11-26
- Granted: 2022-09-20
- Earliest claimed: 2019-05-21
- Assignees: Electronics and Telecommunications Research Institute
- Applicants: Electronics and Telecommunications Research Institute
- Inventors: Gyung Hyun Jo
- Web page: https://patentgrep.com/patent/US11451968B2

## CPC

- H04L 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals}
- H04W 16/14: Spectrum sharing arrangements {between different networks}
- H04W 48/12: using downlink control channel
- H04W 72/0446: Resources in time domain, e.g. slots or frames
- H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA
- H04W 74/0808: using carrier sensing, e.g. carrier sense multiple access [CSMA]
- H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT}
- H04L 5/0062: {Avoidance of ingress interference, e.g. ham radio channels}
- H04L 5/0085: {when channel conditions change}
- H04W 48/16: Discovering, processing access restriction or access information
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

A method for transmitting a discovery burst according to an exemplary embodiment of the present disclosure may comprise performing first channel-sensing with respect to a shared band to transmit the discovery burst through first window of discovery pattern first duration including the first window to N-th window; in case that the shared band is determined to be not-occupied based on the first channel-sensing, transmitting the discovery burst through the first window of the discovery pattern first duration; performing second channel-sensing with respect to the shared band to transmit the discovery burst through second window of discovery pattern second duration including first window to N-th window; and in case that the shared band is determined to be not-occupied based on the second channel-sensing, transmitting the discovery burst through the second window of the discovery pattern second duration.

## Claims

### Claim 1

A method for a transmission node to transmit a discovery burst in a shared band, the method comprising:
performing first channel-sensing with respect to the shared band to transmit the discovery burst through a first window of a discovery pattern first duration including the first window to an N-th window, N being a natural number equal to or greater than 2;
in case that the shared band is determined to be not-occupied based on the first channel-sensing, transmitting the discovery burst through the first window of the discovery pattern first duration;
performing second channel-sensing with respect to the shared band to transmit the discovery burst through a second window of a discovery pattern second duration including the first window to N-th window; and
in case that the shared band is determined to be not-occupied based on the second channel-sensing, transmitting the discovery burst through the second window of the discovery pattern second duration,
wherein the discovery burst is not transmitted through the first window of the discovery pattern second duration although the shared band is not-occupied during the first window of the discovery pattern second duration.

### Claim 2 (depends on 1)

The method of claim 1, further comprising:
selecting a variable discovery pattern between a fixed discovery pattern and the variable discovery pattern.

### Claim 3 (depends on 2)

The method of claim 2, further comprising:
transmitting configuration information on the variable discovery pattern to a reception node.

### Claim 4 (depends on 3)

The method of claim 3, wherein the configuration information on the variable discovery pattern indicates which window is a discovery transmission window among the first window to the N-th window.

### Claim 5 (depends on 1)

The method of claim 1, wherein the discovery burst includes at least one discovery signal unit, and the discovery signal unit includes at least one SSB (synchronization signal block).

### Claim 6 (depends on 5)

The method of claim 5, wherein the SSB includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), a physical broadcast channel (PBCH), and a PBCH-demodulation reference signal (PBCH-DMRS).

### Claim 7

A method for a transmission node to transmit a discovery burst in a shared band, the method comprising:
performing first channel-sensing with respect to the shared band to transmit the discovery burst through a first window of a discovery pattern first duration including the first window to an N-th window, N being a natural number equal to or greater than 2;
in case that the shared band is determined to be not-occupied based on the first channel-sensing, transmitting the discovery burst through the first window of the discovery pattern first duration;
performing second channel-sensing with respect to the shared band to transmit the discovery burst through a second window of a discovery pattern second duration including the first window to N-th window;
in case that the shared band is determined to be not-occupied based on the second channel-sensing, transmitting the discovery burst through the second window of the discovery pattern second duration;
performing third channel-sensing with respect to the shared band to transmit the discovery burst through a first window of a discovery pattern third duration including the first window to N-th window; and
in case that the shared band is determined to be not-occupied based on the third channel-sensing, transmitting the discovery burst through the first window of the discovery pattern third duration.

### Claim 8 (depends on 7)

The method of claim 7, further comprising:
performing fourth channel-sensing with respect to the shared band to transmit the discovery burst through a second window of a discovery pattern fourth duration including first window to N-th window; and
in case that the shared band is determined to be not-occupied based on the fourth channel-sensing, transmitting the discovery burst through the second window of the discovery pattern fourth duration.

### Claim 9

A method for a reception node to receive a discovery burst in a shared band, the method comprising:
receiving configuration information on a variable discovery pattern from a transmission node;
monitoring a first window of a discovery pattern first duration including the first window to an N-th window to receive the discovery burst during the discovery pattern first duration, N being a natural number equal to or greater than 2;
monitoring a second window of a discovery pattern second duration including the first window to N-th window to receive the discovery burst during the discovery pattern second duration; and
monitoring a first window of a discovery pattern third duration including the first window to N-th window to receive the discovery burst during the discovery pattern third duration.

### Claim 10 (depends on 9)

The method of claim 9, wherein the configuration information on the variable discovery pattern indicates which window is a discovery transmission window among the first window to the N-th window.

### Claim 11

A method for a reception node to receive a discovery burst in a shared band, the method comprising:
receiving configuration information on a variable discovery pattern from a transmission node;
monitoring a first window of a discovery pattern first duration including the first window to an N-th window to receive the discovery burst during the discovery pattern first duration, N being a natural number equal to or greater than 2; and
monitoring a second window of a discovery pattern second duration including the first window to N-th window to receive the discovery burst during the discovery pattern second duration,
wherein a half frame indication value obtained from the discovery burst received during the first window of the discovery pattern first duration is different from a half frame indication value obtained from the discovery burst received during the second window of the discovery pattern second duration.

### Claim 12

A transmission node transmitting a discovery burst in a shared band, the transmission node comprising:
a processor; and
a memory storing a program command, the processor executing the program command to cause the transmission node to:
perform first channel-sensing with respect to the shared band;
in case that the shared band is determined to be not-occupied based on the first channel-sensing, transmit the discovery burst through a first window of a discovery pattern first duration including the first window to an N-th window, N being a natural number equal to or greater than 2;
perform second channel-sensing with respect to the shared band; and
in case that the shared band is determined to be not-occupied based on the second channel-sensing, transmit the discovery burst through a second window of a discovery pattern second duration including first window to N-th window,
wherein the discovery burst is transmitted through different windows in each of the discovery pattern first duration and the discovery pattern second duration.

### Claim 13 (depends on 12)

The transmission node of claim 12,
wherein the processor executes the program command to further cause the transmission node to select a discovery pattern between a fixed discovery pattern and a variable discovery pattern,
wherein when the variable discovery pattern is used, the discovery burst is transmitted through different windows in each of the discovery pattern first duration and the discovery pattern second duration, and
wherein when the fixed discovery pattern is used, the discovery burst is transmitted through a same window in each of the discovery pattern first duration and the discovery pattern second duration.