Terminal device, wireless base station wirelessly communicating with the same, and wireless communication system using terminal device and wireless base station
First Claim
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1. A terminal device comprising:
- an antenna;
a wireless module performing wireless communication via the antenna; and
a wakeup transmitter transmitting, in response to a request for start of wireless communication, to a wireless device via the antenna, a wireless frame having a frame length representing identification information of the wireless device to be transitioned from a sleep mode to an operating mode,wherein the wireless frame is the same wireless frame as that transmitted and received by the wireless module to and from the wireless device,the sleep mode is a mode in which the wireless device is not capable of wirelessly communicating with the terminal device,the operating mode is a mode in which the wireless device wirelessly communicates with the terminal device,a cumulative value representing the frame length of the wireless frame is converted to a bit sequence based on a conversion table in the wireless device, and thereby the frame length of the wireless frame is converted to the bit sequence, andthe converted bit sequence is held on the wireless device and is detected as the identification information of the wireless device.
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Abstract
A terminal device 2 transmits a wireless frame having a frame length or amplitude that represents the ID of a wireless base station 1 to be woken up to the wireless base station 1. The wireless base station 1 detects the wakeup ID from the frame length or amplitude of the wireless frame from the terminal device 2, and, if the detected wakeup ID is identical with its own ID, transitions from a sleep mode to an operating mode. In this case, the wireless frame is the same wireless frame as that transmitted and received by the wireless communication module of the terminal device 2 to and from the wireless base station 1.
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Citations
16 Claims
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1. A terminal device comprising:
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an antenna; a wireless module performing wireless communication via the antenna; and a wakeup transmitter transmitting, in response to a request for start of wireless communication, to a wireless device via the antenna, a wireless frame having a frame length representing identification information of the wireless device to be transitioned from a sleep mode to an operating mode, wherein the wireless frame is the same wireless frame as that transmitted and received by the wireless module to and from the wireless device, the sleep mode is a mode in which the wireless device is not capable of wirelessly communicating with the terminal device, the operating mode is a mode in which the wireless device wirelessly communicates with the terminal device, a cumulative value representing the frame length of the wireless frame is converted to a bit sequence based on a conversion table in the wireless device, and thereby the frame length of the wireless frame is converted to the bit sequence, and the converted bit sequence is held on the wireless device and is detected as the identification information of the wireless device. - View Dependent Claims (2, 3, 4)
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5. A wireless device comprising:
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an antenna; a main device regularly transmitting a management frame for managing a terminal device, having an operating mode in which it wirelessly communicating with the terminal device and a sleep mode in which it is not capable of wirelessly communicating with the terminal device, and transitioning from the operating mode to the sleep mode when it has not communicated wirelessly with the terminal device in a certain period of time or no terminal device is assigned to the wireless device; a receiving means receiving a wireless frame via the antenna when the main device is in the sleep mode; a detecting means detecting a frame length of the wireless frame received by the receiving means; an identifying means identifying identification information based on the frame length detected by the detecting means; and an activating means generating, when the identification information identified by the identifying means is identical with identification information of the wireless device, a driving signal for causing the main device to transition from the sleep mode to the operating mode and outputting it to the main device, wherein, in response to the driving signal, the main device transitions from the sleep mode to the operating mode, the wireless frame is the same wireless frame as that transmitted and received by the main device to and from the terminal device, the identifying means converts, upon receiving a cumulative value representing the frame length from the detecting means, the received cumulative value to a bit sequence referring to a conversion table, holds the converted bit sequence, and detects the held bit sequence as the identification information. - View Dependent Claims (6, 7, 8, 9, 10)
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11. A wireless device comprising:
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an antenna; a main device having an operating mode in which it wirelessly communicating with a terminal device which is present in a communication area of the wireless device and a sleep mode in which it is not capable of wirelessly communicating with the terminal device, and transitioning from the operating mode to the sleep mode when it has not communicated wirelessly with the terminal device in a certain period of time or no terminal device is present in the communication area; a receiving means receiving a wireless frame via the antenna when the main device is in the sleep mode; a detecting means detecting a frame length of the wireless frame received by the receiving means; an identifying means identifying identification information based on the frame length detected by the detecting means; and an activating means generating, when the identification information identified by the identifying means is identical with identification information of the wireless device, a driving signal for causing the main device to transition from the sleep mode to the operating mode and outputting it to the main device, wherein, in response to the driving signal, the main device transitions from the sleep mode to the operating mode, the wireless frame is the same wireless frame as that transmitted and received by the main device to and from the terminal device, the identifying means converts, upon receiving a cumulative value representing the frame length from the detecting means, the received cumulative value to a bit sequence referring to a conversion table, holds the converted bit sequence, and detects the held bit sequence as the identification information. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification