# US 2019/0173523 A1 · Operation method of communication node in network supporting low power communication

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- Number: US 2019/0173523 A1
- Document ID: US20190173523A1
- Status: Published application
- Kind: A1
- Application number: 16/208,896
- Filed: 2018-12-04
- Published: 2019-06-06
- Earliest claimed: 2017-12-06
- Assignees: Electronics and Telecommunications Research Institute
- Applicants: Electronics and Telecommunications Research Institute
- Inventors: Geon Min YEO
- Web page: https://patentgrep.com/patent/US20190173523A1

## CPC

- H04B 1/7156: Arrangements for sequence synchronisation
- H04B 1/7143: Arrangements for generation of hop patterns
- H04W 16/14: Spectrum sharing arrangements {between different networks}
- H04W 24/08: Testing, {supervising or monitoring} using real traffic
- H04W 52/0229: {where the received signal is a wanted signal}
- H04W 52/0274: {by switching on or off the equipment or parts thereof}
- 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 48/12: using downlink control channel
- Y02D 30/70: in wireless communication networks
- H04B: TRANSMISSION
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE

## Abstract

An operation method of a device in a communication system includes receiving from a reference node a beacon including configuration information of a downlink/uplink (DL/UL) slot in a super frame #n; confirming a position of the DL/UL slot configured in the super frame #n based on the configuration information; and performing at least one of a DL reception operation and a UL transmission operation in the DL/UL slot. Also, UL communication and DL communication are allowed in the DL/UL slot, and n is an integer equal to or greater than 0.

## Claims

### Claim 1

An operation method of a device in a communication system, the operation method comprising:
receiving from a reference node a beacon including configuration information of a downlink/uplink (DL/UL) slot in a super frame #n;
confirming a position of the DL/UL slot configured in the super frame #n based on the configuration information; and
performing at least one of a DL reception operation and a UL transmission operation in the DL/UL slot,
wherein UL communication and DL communication are allowed in the DL/UL slot, and n is an integer equal to or greater than 0.

### Claim 2 (depends on 1)

The operation method according to claim 1, wherein the configuration information includes information indicating a start time of the DL/UL slot and information indicating a duration of the DL/UL slot.

### Claim 3 (depends on 1)

The operation method according to claim 1, wherein the configuration information includes information indicating a valid period of the DL/UL slot, the DL/UL slot according to the configuration information is configured in each of super frames from the super frame #n to a super frame #j indicated by the valid period, and j is an integer greater than n.

### Claim 4 (depends on 1)

The operation method according to claim 1, wherein, when a DL data unit is not received in a predetermined period from a start time of the DL/UL slot, the UL transmission operation is performed in the DL/UL slot.

### Claim 5 (depends on 1)

The operation method according to claim 1, wherein, when a DL data unit is not received in a predetermined period from a start time of the DL/UL slot and a UL data unit to be transmitted to the reference node is not present, the device operates in a sleep mode until a beacon period in a super frame #(n+1) located after the super frame #n.

### Claim 6 (depends on 1)

The operation method according to claim 1, wherein the DL/UL slot is configured in a contention free period (CFP) of the super frame #n.

### Claim 7 (depends on 1)

The operation method according to claim 1, further comprising receiving from the reference node a DL bitmap indicating whether a DL data unit is to be transmitted in the DL/UL slot, wherein the DL bitmap is received through the beacon or through a separate message after reception of the beacon.

### Claim 8 (depends on 7)

The operation method according to claim 7, wherein, when the DL bitmap indicates that a DL data unit is not to be transmitted in the DL/UL slot, the UL transmission operation is performed in the DL/UL slot.

### Claim 9

An operation method of a reference node in a communication system, the operation method comprising:
generating a beacon including configuration information of a downlink/uplink (DL/UL) slot;
transmitting the beacon in a beacon period in a super frame #n; and
performing at least one of a DL transmission operation and a UL reception operation in the DL/UL slot indicated by the configuration information in the super frame #n,
wherein UL communication and DL communication are allowed in the DL/UL slot, and n is an integer equal to or greater than 0.

### Claim 10 (depends on 9)

The operation method according to claim 9, wherein the configuration information includes information indicating a start time of the DL/UL slot and information indicating a duration of the DL/UL slot.

### Claim 11 (depends on 9)

The operation method according to claim 9, wherein the configuration information includes information indicating a valid period of the DL/UL slot, the DL/UL slot according to the configuration information is configured in each of super frames from the super frame #n to a super frame #j indicated by the valid period, and j is an integer greater than n.

### Claim 12 (depends on 9)

The operation method according to claim 9, wherein the DL/UL slot is configured in a contention free period (CFP) of the super frame #n.

### Claim 13 (depends on 9)

The operation method according to claim 9, further comprising transmitting a DL bitmap indicating whether a DL data unit is to be transmitted in the DL/UL slot, wherein the DL bitmap is transmitted through the beacon or through a separate message after transmission of the beacon.

### Claim 14 (depends on 9)

The operation method according to claim 9, further comprising transmitting a control signal including information indicating a frequency band in which the beacon was transmitted through a predetermined frequency band, wherein the control signal is transmitted after the beacon in the super frame #n, and the predetermined frequency band is different from the frequency band in which the beacon was transmitted.

### Claim 15

A device in a communication system, the device comprising a processor and a memory storing at least one instruction executed by the processor, wherein the at least one instruction is configured to:
receive from a reference node a control signal indicating a frequency band #k in which a beacon #1 is transmitted, in a frequency band #m of a super frame #n;
predict a frequency band #p in which a beacon #2 is to be transmitted in a super frame #(n+1) based on the frequency band #k and a predetermined frequency hopping pattern;
receive from the reference node the beacon #2 including configuration information of a downlink/uplink (DL/UL) slot in the frequency band #p of the super frame #(n+1);
identify a position of the DL/UL slot configured in the super frame #(n+1) based on the configuration information; and
perform at least one of a DL reception operation and a UL transmission operation in the DL/UL slot,
wherein UL communication and DL communication are allowed in the DL/UL slot, n is an integer equal to or greater than 0, and m and p are positive integers different from each other.

### Claim 16 (depends on 15)

The device according to claim 15, wherein the configuration information includes information indicating a start time of the DL/UL slot, information indicating a duration of the DL/UL slot, and information indicating a valid period of the DL/UL slot, the DL/UL slot according to the configuration information is configured in each of super frames from the super frame #(n+1) to a super frame #j indicated by the valid period, and j is an integer greater than (n+1).

### Claim 17 (depends on 15)

The device according to claim 15, wherein, when a DL data unit is not received in a predetermined period from a start time of the DL/UL slot, the UL transmission operation is performed in the DL/UL slot.

### Claim 18 (depends on 15)

The device according to claim 15, wherein, when a DL data unit is not received in a predetermined period from a start time of the DL/UL slot and a UL data unit to be transmitted to the reference node is not present, the device operates in a sleep mode until a beacon period in a super frame #(n+2) located after the super frame #(n+1).

### Claim 19 (depends on 15)

The device according to claim 15, wherein the at least one instruction is further configured to receive from the reference node a DL bitmap indicating whether a DL data unit is to be transmitted in the DL/UL slot, wherein the DL bitmap is received through the beacon #2 or through a separate message after reception of the beacon #2.

### Claim 20 (depends on 19)

The device according to claim 19, wherein, when the DL bitmap indicates that a DL data unit is not to be transmitted in the DL/UL slot, the UL transmission operation is performed in the DL/UL slot.