Radio transmitting apparatus and radio receiving apparatus

Patent metadata

Field	Value
Publication number	US-2016262105-A1
Application number	US-201514980352-A
Country	US
Kind code	A1
Filing date	Dec 28, 2015
Priority date	Mar 4, 2015
Publication date	Sep 8, 2016
Grant date	—

Abstract

A radio apparatus that allows a user to check a state of a power supply is provided. A radio transmitting apparatus 10 includes a power supply voltage measurement unit 11 that measures a power supply voltage, a transmission power determination unit 12 that determines a transmission power based on the power supply voltage that has been measured, and a radio transmitting unit 13 that transmits by radio an advertisement packet including transmission power information indicating the transmission power that has been determined at the transmission power that has been determined. A radio receiving apparatus 20 includes a radio receiving unit 23 that receives the advertisement packet and a power supply state detection unit 21 that detects the state of the power supply of the radio transmitting apparatus 10 based on the transmission power information included in the advertisement packet.

First claim

What is claimed is:

1 . A radio transmitting apparatus comprising:
a power supply voltage measurement unit that measures a power supply voltage; a transmission power determination unit that determines a transmission power based on the power supply voltage that has been measured; and a radio transmitting unit that transmits by radio an advertisement packet including transmission power information indicating the transmission power that has been determined based on the transmission power that has been determined.

2 . The radio transmitting apparatus according to claim 1 , wherein:
the advertisement packet is an iBeacon (registered trademark) packet in compliance with Bluetooth (registered trademark), and the transmission power information is Measured Power of the iBeacon packet.

3 . The radio transmitting apparatus according to claim 1 , wherein the transmission power determination unit changes the transmission power according to a decrease in the power supply voltage that has been measured.

4 . The radio transmitting apparatus according to claim 3 , wherein the transmission power determination unit changes the transmission power every time the advertisement packet is transmitted.

5 . The radio transmitting apparatus according to claim 3 , wherein the transmission power determination unit changes the transmission power when the power supply voltage that has been measured is lower than a threshold of the power supply voltage corresponding to a timing when a battery, which is a power supply, should be changed.

6 . The radio transmitting apparatus according to claim 1 , comprising:
a storage unit that stores a transmission power pattern table, the transmission power pattern table associating the power supply voltage with a transmission power pattern indicating the transmission power for every transmission of the advertisement packet, and the transmission power determination unit determines the transmission power according to the power supply voltage that has been measured based on the transmission power pattern table.

7 . The radio transmitting apparatus according to claim 1 , comprising:
a storage unit that stores a transmission power pattern table, the transmission power pattern table associating a transmission power pattern indicating the transmission power for every transmission of the advertisement packet with a residual capacity of a battery which is a power supply, wherein the transmission power determination unit determines the transmission power according to the residual capacity of the battery corresponding to the power supply voltage that has been measured based on the transmission power pattern table.

8 . The radio transmitting apparatus according to claim 1 , wherein the radio transmitting unit comprises an attenuator that switches the transmission power of the advertisement packet according to a control signal corresponding to the transmission power that has been determined.

9 . A radio transmitting apparatus comprising:
a power supply voltage measurement unit that measures a power supply voltage; a transmission power determination unit that determines a transmission power based on a result of comparing a predetermined value with a value based on the power supply voltage; and a radio transmitting unit that reduces the power to be transmitted based on the transmission power that has been determined.

10 . The radio transmitting apparatus according to claim 9 , wherein the radio transmitting unit changes transmission power information to be transmitted based on the transmission power that has been determined.

11 . A radio receiving apparatus comprising:
a radio receiving unit that receives an advertisement packet; and a power supply state detection unit that detects a state of a power supply of a transmission apparatus that transmits the advertisement packet based on transmission power information included in the advertisement packet.

12 . The radio receiving apparatus according to claim 11 , comprising:
a received signal strength measurement unit that measures a received signal strength of a radio signal including the advertisement packet received by the radio receiving unit, wherein the power supply state detection unit detects the state of the power supply of the transmission apparatus based on the transmission power information included in the advertisement packet and the received signal strength that has been measured.

13 . The radio receiving apparatus according to claim 11 , wherein:
the advertisement packet is an iBeacon (registered trademark) packet in compliance with Bluetooth (registered trademark), and the transmission power information is Measured Power of the iBeacon packet.

14 . The radio receiving apparatus according to claim 11 , wherein the power supply state detection unit detects the state of the power supply based on changes of the transmission power information for each of the advertisement packets that have been received.

15 . The radio receiving apparatus according to claim 14 , wherein the power supply state detection unit detects a decrease in a power supply voltage of the transmission apparatus based on the changes of the transmission power information.

16 . The radio receiving apparatus according to claim 14 , wherein the power supply state detection unit detects a timing when a battery, which is a power supply, of the transmission apparatus should be changed based on the changes of the transmission power information.

17 . The radio receiving apparatus according to claim 11 , comprising:
a storage unit that stores a received signal strength pattern table, the received signal strength pattern table associating a received signal strength pattern indicating a received signal strength for each of the advertisement packets to be received with a power supply voltage of the radio transmitting apparatus, wherein the power supply state detection unit detects the power supply voltage according to the transmission power information based on the received signal strength pattern table.

18 . The radio receiving apparatus according to claim 11 , comprising:
a storage unit that stores a received signal strength pattern table, the received signal strength pattern table associating a received signal strength pattern indicating a received signal strength for each of the advertisement packets to be received with a residual capacity of a battery which is a power supply of the radio transmitting apparatus, wherein the power supply state detection unit detects the residual capacity of the battery according to the transmission power information based on the received signal strength pattern table.

Assignees

• Renesas Electronics Corp

Inventors

• Tomisawa Satoru

Classifications

• H04W4/008

  Electricity · mapped topic

• H04W52/247

  where the output power of a terminal is based on a path parameter sent by another terminal · CPC title

• H04W4/206

  Electricity · mapped topic

• H04W52/245

  taking into account received signal strength · CPC title

• H04W52/0251 Primary

  using monitoring of local events, e.g. events related to user activity · CPC title