Control device, terminal device, and communication system and communication method using the same
A technology for a terminal device and a control device, which is applied in wireless communication, electrical components, network topology, etc., and can solve problems such as increased power consumption
Inactive Publication Date: 2013-10-02
PANASONIC CORP
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Problems solved by technology
To solve this problem, communication delay can be reduced by extending the active period relative to the inactive period, but at this time, wireless terminal devices that transmit and receive a small amount of data also need to operate during the active period, resulting in power consumption Increase
Method used
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Embodiment Construction
[0060] Embodiments of the present invention will be described below with reference to the drawings.
[0061] figure 1 It is a diagram showing an example of a radio communication system in an embodiment of the present invention. A wireless communication system is a network including control devices and terminal devices. exist figure 1 In the shown example, wireless network 100 includes control device 101 that is a base station that controls wireless network 100 , and terminal devices 102 to 104 that are wireless terminals that perform wireless communication with control device 101 according to the control of control device 101 . Although the number of terminal devices is three in this example, it may be a different number.
[0062] figure 2 It is a block diagram showing an example of the device configuration of the control device 101 in Embodiment 1 of the present invention. The control device 101 has: an antenna 201, a wireless receiving unit 202, a received data analy...
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A terminal device (102), used in communication system conducting communication by periodically switching frequency channels in a predefined sequence, communicating with a control device using a predefined channel, including: an antenna; a reception section receiving, from the control device (101), via the antenna, data and a beacon containing control information indicating the sequence and its timing; a transmission section transmitting data to the control device via the antenna; a data volume determining section determining whether a transmission is completable within a predefined period; and a control section controlling, within the period, the reception section to receive the data and the beacon, and the transmission section to transmit the data, and when the data volume determining section determines that the transmission is not completable, further controlling the transmission section to, determine a next-to-be-used channel based on the control information, switch to the channel after the period, and continue the transmission.
Description
technical field [0001] The present invention relates to a control device, a plurality of wireless terminal devices, a communication system composed of these devices, and a communication method used in the communication system, and particularly relates to a sensor network and an active radio frequency (RF: Radio Frequency) tag, etc. Power-saving technology and technology to improve transmission efficiency in the terminal's wireless network. Background technique [0002] In recent years, wireless personal area networks (WPAN: Wireless Personal Area Networks) and sensor networks, which are formed using small wireless terminal devices with low power consumption, have attracted attention. Also, as a system similar thereto, there is a system such as an active RF tag which itself transmits a wireless signal. [0003] Such a wireless network is composed of a control device as a base station and a terminal device as a plurality of wireless terminals. The control device includes the...
Claims
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IPC IPC(8): H04W74/04H04W52/02H04W72/04H04W84/10
CPCH04W72/02H04W72/0453
Inventor 林野裕司太田良隆中江宏典
Owner PANASONIC CORP