# US 2016/0262115 A1 · System for downlink transmission using heterogeneous power

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- Number: US 2016/0262115 A1
- Document ID: US20160262115A1
- Status: Published application
- Kind: A1
- Application number: 15/059,688
- Filed: 2016-03-03
- Published: 2016-09-08
- Earliest claimed: 2015-03-04
- Assignees: Agency for Defense Development
- Inventors: Hyungsin KIM; Bongsoo ROH; Saewoong BAHK; Young-June CHOI
- Web page: https://patentgrep.com/patent/US20160262115A1

## CPC

- H04W 52/287: {when the channel is in stand-by}
- H04L 1/00: Arrangements for detecting or preventing errors in the information received {(correcting synchronisation H04L7/00)}
- H04L 1/08: by repeating transmission, e.g. Verdan system {(H04L1/1858 and H04L1/189 take precedence)}
- H04L 1/1607: Details of the supervisory signal
- H04W 52/0219: {where the power saving management affects multiple terminals}
- H04W 52/143: {Downlink power control}
- H04W 76/27: Transitions between radio resource control [RRC] states
- H04L 2001/0093: {Point-to-multipoint}
- H04L 2001/0097: {Relays}
- Y02D 30/70: in wireless communication networks
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- 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

A system for downlink transmission using heterogeneous power includes a plurality of sensor nodes, a coordinator connected to a network including the plurality of sensor nodes and configured to transmit data to the plurality of sensor nodes, a power source configured to supply power required for the coordinator to transmit data to each of the plurality of sensor nodes through a single transmission passage at a position away by a specific distance from the network, to the coordinator, and a battery configured to supply power required for the plurality of sensor nodes to perform communication within the network, to the plurality of sensor nodes, wherein when a destination node as a reception target of the data, among the plurality of sensor nodes, receives the data, the destination node transmits a signal indicating the data reception to the other remaining nodes among the plurality of sensor nodes.

## Claims

### Claim 1

A system for downlink transmission using heterogeneous power, the system comprising:
a plurality of sensor nodes;
a coordinator connected to a network including the plurality of sensor nodes and configured to transmit data to the plurality of sensor nodes;
a power source configured to supply power required for the coordinator to transmit data to each of the plurality of sensor nodes through a single transmission passage at a position away by a specific distance from the network, to the coordinator; and
a battery configured to supply power required for the plurality of sensor nodes to perform communication within the network, to the plurality of sensor nodes, wherein when a destination node as a reception target of the data, among the plurality of sensor nodes, receives the data, the destination node transmits a signal indicating the data reception to the other remaining nodes among the plurality of sensor nodes.

### Claim 2 (depends on 1)

The system of claim 1, wherein the plurality of sensor nodes are maintained in a sleep mode in which transmission and reception of the data or a signal is limited in order to use power received from the battery for transmission and reception of the data or a signal.

### Claim 3 (depends on 2)

The system of claim 2, wherein the plurality of sensor nodes are switched from the sleep mode to a reception mode in which at least one of the data and a signal is received, to operate on the basis of a preset period.

### Claim 4 (depends on 1)

The system of claim 1, wherein the coordinator repeatedly transmits the data to each of the plurality of sensor nodes during the preset period and calculates a remaining time excluding a time taken for transmitting the data from the preset period, and the data includes information regarding the remaining time.

### Claim 5 (depends on 4)

The system of claim 4, wherein when data in which the remaining time is zero is transmitted, the plurality of sensor nodes receive the data, and when data in which the remaining time is not zero is transmitted, the plurality of sensor nodes, without receiving the data, enter a sleep mode in which transmission and reception of the data is limited until the data in which the remaining time is zero is transmitted.

### Claim 6 (depends on 4)

The system of claim 4, wherein when the data in which the remaining time is zero is received, the remaining nodes store the data, and when the signal is received from the destination node, the remaining nodes delete the stored data, and when the signal is not received from the destination node, the remaining nodes transmit the stored data to the destination node.