Method of communication and base station

• US 7,991,354 B2
• Filed: 11/18/2010
• Issued: 08/02/2011
• Est. Priority Date: 07/21/2004
• Status: Expired due to Fees

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Miyazaki, Masayuki, Yano, Kazuo, Oogushi, Minoru
• Primary Examiner(s): West; Lewis G
• Assistant Examiner(s): Safaipour; Bobbak
• Application Number:
  US12/926,449
• Publication Number:
  US 20110070909A1
• Time in Patent Office: 257 Days
• Field of Search: 455/522, 455/69, 455/561, 455/127.5, 455/574, 370/328, 370/382, 370/392
• US Class Current: 455/39
• CPC Class Codes: H04W 52/0235 where the received signal is a power saving command
• CPC Class Codes: H04W 52/287 when the channel is in stand-by
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

There are provided a method of communication which can reliably transmit information from a base station to a wireless terminal in a system which can reduce power consumption by intermittent operation in which the wireless terminal repeats operating state and suspended state by power on and off and the base station used for the method. The method includes the steps of storing base station information such as a command or data supplied to the wireless terminal in the base station, transferring the wireless terminal from the suspended state to the operating state to transmit information from the sensor to the base station, coupling the base station information stored in the base station to a response signal to transmit it to the wireless terminal in the operating state for transmitting the sensor information, and returning the wireless terminal to the suspended state after completing the transmission of the base station information and sensor information.

Claims

1. A method of communication which is performed between a wireless terminal and a base station, the wireless terminal comprising a sensor and a wireless apparatus, comprising the steps of:

transforming the sensor from first suspended state into first operating state;

measuring sensor data with the sensor in the first operating state;

transforming the sensor from the first operating state into the first suspended state after measuring sensor data;

repeating the first operating state and the first suspended state;

transforming the wireless apparatus from second suspended state into second operating state based on a plurality of the first operating state;

transmitting with the wireless apparatus in the second operating state a plurality of sensor data measured by the sensor in the plurality of the first operating state to the base station after measurement with the sensor in the plurality of the first operating state;

receiving the plurality of sensor data with the base station;

transmitting information for the wireless terminal to the wireless terminal with the base station;

transforming the wireless apparatus from the second operating state into the second suspended state after receiving the information for the wireless terminal; and

repeating the second operating state and the second suspended state.

2. The method of communication according to claim 1,

wherein the wireless apparatus transmits the plurality of sensor data to the base station so as not to overlap with measurement of the sensor in the plurality of the first operating state.

3. The method of communication according to claim 1,

wherein the sensor is transformed from the first suspended state into the first operating state based on a value or an amount of change in a physical quantity measured by the wireless terminal.

4. The method of communication according to claim 1, further comprising the step of:

estimating a result of the measurement with the sensor,

wherein the wireless terminal does not transmit the measured data when the result of the measurement with the sensor is matched with the estimated result.

5. A wireless terminal comprising:

a sensor which is transformed from first suspended state into first operating state, measures sensor data in the first operating state, is transformed from the first operating state into the first suspended state after measuring sensor data, and repeats the first operating state and the first suspended state; and

a wireless apparatus which is transformed from second suspended state into second operating state based on a plurality of the first operating state, transmits in the second operating state a plurality of sensor data measured by the sensor in the plurality of the first operating state to a base station after measurement with the sensor in the plurality of the first operating state,

wherein the wireless apparatus is transformed from the second operating state into the second suspended state after receiving the information for the wireless terminal which is transmitted by the base station receiving the plurality of sensor data, and

the wireless apparatus repeats the second operating state and the second suspended state.

6. The wireless terminal according to claim 5,

wherein the wireless apparatus transmits the plurality of sensor data to the base station so as not to overlap with measurement of the sensor in the plurality of the first operating state.

7. The wireless terminal according to claim 6,

wherein the sensor is transformed from the first suspended state into the first operating state based on a value or an amount of change in a physical quantity measured by the wireless terminal.

8. The wireless terminal according to claim 5,

wherein the wireless terminal estimates a result of the measurement with the sensor, and the wireless terminal does not transmit the measured data when the result of the measurement with the sensor is matched with the estimated result.

9. A network system comprising

a wireless terminal which includes

a sensor which is transformed from first suspended state into first operating state, measures sensor data in the first operating state, is transformed from the first operating state into the first suspended state after measuring sensor data, and repeats the first operating state and the first suspended state, and

a first wireless apparatus which is transformed from second suspended state into second operating state based on a plurality of the first operating state, transmits in the second operating state a plurality of sensor data measured by the sensor in the plurality of the first operating state to a base station after measurement with the sensor in the plurality of the first operating state;

and

a base station which includes

a second wireless apparatus which receives the plurality of sensor data, and

a controller which controls the second wireless apparatus to transmit information for the wireless terminal to the wireless terminal,

wherein the first wireless apparatus is transformed from the second operating state into the second suspended state after receiving the information for the wireless terminal, and

the first wireless apparatus repeats the second operating state and the second suspended state.

10. The network system according to claim 9,

wherein the first wireless apparatus transmits the plurality of sensor data to the base station so as not to overlap with measurement of the sensor in the plurality of the first operating state.

11. The network system according to claim 9,

wherein the sensor is transformed from the first suspended state into the first operating state based on a value or an amount of change in a physical quantity measured by the wireless terminal.

12. The network system according to claim 9,

wherein the wireless terminal or the base station estimates a result of the measurement with the sensor, and the wireless terminal does not transmit the measured data when the result of the measurement with the sensor is matched with the estimated result.