JP2008054798A - Biological information monitor system and time shared multiple synchronization method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a biological information monitor system preventing a reception level from lowering due to the noncoincidence of polarization plane between a compact radio terminal and a radio communication apparatus and monitoring the biological information of a subject in a wide range, and to provide the biological information monitor system and a time shared multiple synchronization method performing radio communication using time shared multiple communication without performing transmission/reception switching processing before and after a synchronization slot at high speed. <P>SOLUTION: The biological information monitor system comprises: the compact radio terminal 10 for acquiring and transmitting the biological information of the subject 1; a repeater 30 for amplifying and transmitting received radio signals; and the radio communication apparatus 20 for acquiring the biological information. The radio communication apparatus 20 performs reception by a plurality of circular polarized antennas 21 disposed at a prescribed interval. Also, the radio communication terminal 20 transmits a plurality of frame synchronization patterns, and the small-sized radio terminal 10 transmits data in synchronism with the predetermined frame synchronization pattern. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a biological information monitoring system and a time division multiple synchronization method, and more particularly to a biological information monitoring system and a time division multiple synchronization method using wireless communication.

  The conventional biological information monitoring system includes, for example, “a transmitter having a detection unit that detects a biological signal using a sensor, a modulation circuit that modulates the detected signal to be transmitted wirelessly, and the detection signal” And a receiver 30 having a connector 32 for transmitting the demodulated signal to the biological signal input unit of the biological signal monitoring device 20. The connector 32 in the receiver is connected to various biological signal monitoring devices. It is configured to be connectable to 20 common biological signal input units ”(for example, see Patent Document 1).

  In addition, as a diversity antenna that can transmit and receive in an arbitrary direction and is not easily affected by fading in wireless communication, for example, “a dipole antenna 2 (linearly polarized antenna) is housed in the lower case 1 and a patch antenna 4 (circularly polarized wave) Antenna) is housed in the upper case 3 and the standing posture of the upper case 3 supported on the lower case 1 can be changed, whereby the effect of polarization diversity can be expected in addition to the effect of space diversity, It becomes less susceptible to multipath effects, and by appropriately adjusting the direction of the patch antenna 4, the patch antenna 4 can perform transmission and reception above and below that cannot be performed by the dipole antenna 2. Has been proposed (see, for example, Patent Document 2).

  Further, as a wireless communication apparatus that performs wireless communication with a plurality of transmitters by time division multiplex communication, for example, “a bit string demodulated by the demodulation unit 101 enters the unique word detector 102 and is detected when a unique word is detected. The signal 103 is sent to the counter control unit 104. The counter control unit 104 sends only the unique word signal sent to the counter unit 105 that satisfies a specified condition to the counter unit 105. In the counter unit 105, the counter control unit 104 is sent. When the unique word that has passed the above check is confirmed, the counter value is set to a specified value, and the separation unit 106 sets the data sent from the demodulating unit 101 based on the value of the counter unit 105 to the specified count. “Cut out by value” has been proposed (see, for example, Patent Document 3).

JP 2003-10138 A (summary) JP 2004-56281 A (summary) Japanese Patent Laid-Open No. 6-141209 (summary)

  In general, body movement signals (hereinafter referred to as biological information) such as biological signals for monitoring a subject's electromyogram, electrocardiogram, respiratory waveform, brain wave, and acceleration data for monitoring the body movement state of the subject are monitored. In this case, a biological signal or the like is acquired by a sensor or the like attached to an arbitrary place of a subject (human body) via an electrode or the like, information on the acquired biological signal is collected in an information processing device, and information processing is appropriately performed to perform a biological Monitor information.

  In such a biological information monitor system, in order to acquire biological information without impairing the subject's motor function, it is required to transmit the biological information to the information processing apparatus by wireless communication, and a sensor attached to the subject Wireless terminals are required to be small and lightweight.

  However, when a small and lightweight wireless terminal equipped with a sensor (hereinafter referred to as a small wireless terminal) is attached to the subject, the polarization plane of the transmission antenna of the small wireless terminal becomes uncertain due to the movement of the subject. There is a problem that the reception level is lowered due to the mismatch of the polarization planes of the antenna and the receiving antenna. In addition, there is a problem in that when the polarization planes of the transmission antenna and the reception antenna are mismatched, the influence of multipath fading cannot be reduced due to diversity.

  In addition, when a plurality of small wireless terminals are attached to a subject and wireless communication is performed using a time division multiple access (hereinafter also referred to as TDMA) with a plurality of small wireless terminals, transmission / reception switching processing before and after the synchronization slot is performed. There is a problem that it is difficult to reduce the size and weight of a small wireless terminal with a simple configuration.

  Further, when the above-described small wireless terminal is used, it is necessary to reduce the size of the transmission antenna, it is difficult to increase the antenna gain, and it is also necessary to reduce the power supply (battery) to be mounted. Since it is difficult to increase the output power source, there is a problem that the communication distance is shortened and the biological information of the subject cannot be monitored over a wide range.

  The present invention has been made to solve the above-described problems. The first object of the present invention is to improve the reception level due to the mismatch of the polarization planes of the transmission antenna and the reception antenna of the small wireless terminal attached to the subject. The present invention provides a biological information monitoring system capable of reducing the decrease and making it less susceptible to multipath fading due to the effect of space diversity.

  The second purpose is to reduce the size and weight of a small wireless terminal attached to the subject with a simple configuration, and even when high-speed processing is not possible, time-division is performed without performing transmission / reception switching processing before and after the synchronization slot at high speed. A biological information monitoring system and a time-division multiplex synchronization method capable of wireless communication using multiplex communication are obtained.

  A third object is to obtain a biological information monitoring system that can reduce the size and weight of a small wireless terminal attached to a subject and monitor the biological information of the subject over a wide range even when the wireless communication distance is short. Is.

  A biological information monitoring system according to the present invention is mounted on a human body, acquires the biological information of the human body, transmits the acquired biological information, and wireless receives the biological information transmitted from the wireless terminal. And a communication device.

  A wireless terminal that is attached to the human body, acquires the biological information of the human body, transmits the acquired biological information, receives a wireless signal transmitted from the wireless terminal, amplifies the received wireless signal, and transmits And a wireless communication device that receives the wireless signal transmitted from the wireless terminal or the relay device and acquires the biological information.

  The relay device is attached to a human body on which the wireless communication terminal is attached.

  The wireless communication device includes a plurality of circularly polarized antennas arranged at predetermined intervals, and a diversity receiving circuit to which a radio signal received by the circularly polarized antenna is input, and the plurality of circles The polarization antenna constitutes space diversity.

  In addition, the relay device includes a plurality of circularly polarized antennas arranged at predetermined intervals, and a diversity receiving circuit to which a radio signal received by the circularly polarized antenna is input, and the plurality of circularly polarized waves are provided. The wave antenna constitutes space diversity.

  The diversity receiving circuit selects and outputs a signal having a high reception strength among radio signals input from the plurality of circularly polarized antennas.

  The diversity receiving circuit synthesizes and outputs radio signals input from the plurality of circularly polarized antennas.

  The wireless communication apparatus assigns a plurality of slots to a frame having a predetermined time length by time division, and performs time division multiplex communication in synchronization with the plurality of wireless terminals to which the slots are assigned.

  Further, the wireless communication device transmits a plurality of frame synchronization patterns inserted between predetermined slots of the frame, receives data transmitted from the wireless terminal in synchronization with the frame synchronization pattern, and The terminal receives a plurality of frame synchronization patterns transmitted from the wireless communication apparatus, and transmits data in synchronization with a predetermined frame synchronization pattern among the plurality of received frame synchronization patterns.

  The wireless terminal is synchronized with a frame synchronization pattern that is not adjacent to the slot to which the wireless terminal is assigned, among the plurality of frame synchronization patterns.

  Further, the wireless communication device inserts different types of frame synchronization patterns at the beginning of the frame and in the middle of the frame.

  In addition, the time division multiplex synchronization method according to the present invention allocates a plurality of slots to a frame having a predetermined time length in a time division manner, and the plurality of radio terminals to which the slots are allocated and a radio communication apparatus are synchronized. A time division multiplex synchronization method for communicating, wherein the wireless terminal receives a plurality of frame synchronization patterns transmitted from the wireless communication device, and a predetermined frame synchronization among the plurality of received frame synchronization patterns Data transmission is performed in synchronization with a pattern, and the wireless communication device transmits a plurality of frame synchronization patterns inserted between predetermined slots of the frame, and the data transmitted from the wireless terminal is converted into the frame synchronization pattern. It is received synchronously.

  The wireless terminal is synchronized with a frame synchronization pattern that is not adjacent to a slot to which the wireless terminal is assigned, among the plurality of frame synchronization patterns.

  The frame synchronization patterns are two types of frame synchronization patterns inserted between the head of the frame and the middle of the frame.

  According to the present invention, biological information transmitted from a wireless terminal is received by a plurality of circularly polarized antennas arranged at a predetermined interval, so that the wireless terminal attached to the human body and the wireless communication device are offset. A reduction in reception level due to wavefront mismatch can be reduced, and the effect of space diversity can be made less susceptible to multipath fading.

  In addition, the wireless communication terminal transmits a plurality of frame synchronization patterns, and the wireless terminal that has received the frame synchronization pattern performs data transmission in synchronization with a predetermined frame synchronization pattern, thereby switching between transmission and reception before and after the synchronization slot. Wireless communication using time division multiplex communication can be performed without performing high-speed processing.

  In addition, by amplifying and transmitting a radio signal transmitted from a wireless terminal by a relay device, it is possible to monitor biological information over a wide range even when the communication distance of the wireless terminal is short.

Embodiment 1 FIG.
FIG. 1 is a configuration diagram of the biological information monitoring system according to the first embodiment. In the figure, the biological information monitoring system according to the first embodiment is a plurality of small terminals that are attached to a human body of a subject 1 who exercises in a sports gym, a rehabilitation facility, and the like and have sensors that acquire biological information. The wireless terminal 10 includes a wireless communication apparatus 20 that performs TDMA communication with the plurality of small wireless terminals 10 and outputs received information to the information processing apparatus 2. Further, the wireless communication device 20 includes a plurality of circularly polarized antennas 21.

  FIG. 2 is a configuration diagram of the small wireless terminal according to the first embodiment. In the figure, a small wireless terminal 10 is a body motion such as a biological signal for monitoring, for example, an electromyogram, an electrocardiogram, a respiratory waveform, an electroencephalogram, and the like of the subject 1 and acceleration data for monitoring the body motion state of the subject 1. A data control unit composed of a sensor 11 that detects a signal, and an electronic circuit (microprocessor) that converts data detected by the sensor 11 into digital information and then transmits data at a predetermined synchronization timing by an operation described later. 12 and the transmission data input from the data control unit 12 are modulated into a radio signal and transmitted through the antenna 14, and a frame synchronization pattern (described later) received from the radio communication device 20 is demodulated to demodulate the data control unit 12. A wireless unit 13 that inputs to the battery, a battery 15 (for example, a button battery) that supplies power to the sensor 11 and the data control unit 12, Of the two types of frame synchronization pattern of predicate, the switch 16 (e.g., dip switch) for selecting a frame synchronization pattern corresponding to the small radio terminal 10 and a. The sensor 11, the data control unit 12, the radio unit 13, the antenna 14, the battery 15 and the switch 16 constituting the small wireless terminal 10 are integrally formed in a small package (for example, a size of 500 yen coin). The test subject 1 is attached to the subject 1 with an adhesive tape or the like that adheres the eleven electrodes or the like to the body surface (skin) of the subject 1. The antenna 14 of the small wireless terminal 10 transmits data at a short distance (for example, about 5 m to 10 m) by a linearly polarized antenna such as a monopole antenna or a dipole antenna. Is low.

  FIG. 3 is a configuration diagram of the wireless communication apparatus according to the first embodiment. In the figure, a wireless communication device 20 includes a plurality of circularly polarized antennas 21, an antenna duplexer 22 for sharing the circularly polarized antenna 21 for transmission and reception, and a frame synchronization pattern (described later) transmitted to the small wireless terminal 10. A transmission circuit 23 that modulates and transmits via the circularly polarized antenna 21; a diversity reception circuit 24 that receives transmission data received from the small wireless terminal 10 and demodulates and outputs the received data; By operation, two types of frame synchronization patterns are output, and transmission data transmitted at a predetermined timing from the small wireless terminal 10 that has received the frame synchronization pattern is received in synchronization with a plurality of small wireless terminals 10. It comprises a time division multiple access device 25 that performs TDMA communication and inputs received biometric information to the information processing device 2.Note that the information processing apparatus 2 (for example, a personal computer) to which the biological information is input processes the input biological information and displays it on a display or the like as numerical data or graphic data of various biological signals and body motion signals. .

  The circularly polarized antenna 21 uses, for example, a patch antenna to provide a substantially square patch electrode and a feeding microstrip line on one surface of a dielectric substrate, and a ground conductor on almost the entire other surface of the dielectric substrate. A circularly polarized antenna that is provided and feeds a high-frequency signal to the patch electrode via a feed line and a microstrip line. The circularly polarized antenna 21 may use either a right-hand circular polarization or a left-hand circular polarization.

  A plurality of the circularly polarized antennas 21 are provided in the wireless communication device 20 to constitute space diversity. In the case of configuring space diversity reception using reception signals from a plurality of circularly polarized antennas 21, even if the reception level of a certain circularly polarized antenna 21 is low, the reception level of another circularly polarized antenna 21 is high. A greater diversity improvement effect can be obtained. Therefore, the circularly polarized antennas 21 are arranged so that the correlation of the received waves received by the circularly polarized antennas 21-1, 21-2,. The signal waves received by the plurality of circularly polarized antennas 21 are sent to the diversity receiving circuit 24, and a signal wave having a high reception intensity is selected or received after the signal waves are combined.

  Next, the operation of communication between the small wireless terminal 10 and the wireless communication device 20 configured as described above will be described.

First, a conventional time division multiplex synchronization method will be described.
FIG. 4 is a diagram showing a frame configuration according to the conventional time division multiplex synchronization method, and FIG. 5 is a diagram showing transmission timing of each slot according to the conventional time division multiplex synchronization method. As shown in FIG. 4, one frame having a predetermined time length is time-divided to form a plurality of slots (here, 8 slots), and the transmission terminal assigned to each slot is synchronized with the slot. By performing data transmission in this way, it is possible to receive data transmitted from a plurality of transmission terminals. As shown in FIG. 5, the synchronization timing of such a slot is such that a frame synchronization pattern (hereinafter also referred to as a synchronization pattern) is transmitted for each frame from a wireless communication apparatus that receives data, and transmission in which this synchronization pattern is received. The terminals a to h correct the frame synchronization counter and start transmission at the timing of the slot corresponding to the transmission terminal. As described above, after a plurality of transmitting terminals receive the synchronization pattern, transmission is performed at the corresponding slot timing, thereby enabling communication with the number of transmitting terminals corresponding to the number of slots constituting one frame. .

  However, as shown in FIG. 5, the transmitting terminal a corresponding to the slot 1 needs to transmit immediately after receiving the synchronization pattern as described above, and the transmitting terminal h corresponding to the slot 8 The synchronization pattern needs to be received immediately after the transmission is completed, and high speed switching between transmission and reception is required. On the other hand, as a method that does not require high-speed switching of transmission and reception, there is a method of adding guard bits before and after the synchronization pattern. In this case, the data transmission efficiency is greatly reduced. A time division multiplex synchronization method according to the first embodiment, which does not require such high speed switching between transmission and reception, will be described with reference to FIGS.

  FIG. 6 is a diagram illustrating a frame configuration according to the first embodiment, and FIG. 7 is a diagram illustrating transmission timing of each slot according to the first embodiment. Here, for example, a case where eight small wireless terminals 10-1 to 10-8 and the wireless communication device 20 communicate in the same frequency band will be described. As shown in FIG. 6, one frame is composed of 8 slots, and two types of frame synchronization patterns are arranged in one frame. A first synchronization pattern 100 is arranged at the head of the frame, and a second synchronization pattern 200 is arranged in the middle of the frame (between slot 4 and slot 5). In such a frame configuration, each small wireless terminal 10 is assigned a corresponding slot.

  In such a frame configuration, as shown in FIG. 7, each small wireless terminal 10 synchronizes with a synchronization pattern that is not adjacent to an assigned slot among two types of synchronization patterns. That is, the small wireless terminals 10-1 and 10-8 corresponding to the slots 1 and 8 adjacent to the first synchronization pattern 100 are synchronized with the second synchronization pattern 200 and are adjacent to the second synchronization pattern 200. The small wireless terminals 10-4 and 10-5 corresponding to 4 and 5 are synchronized with the second synchronization pattern 100. Note that the small wireless terminal 10 to which a slot not adjacent to two types of synchronization patterns is assigned synchronizes with an arbitrary synchronization pattern. Here, slots 1, 2, 3 and 8 are synchronized with the second synchronization pattern 200, and slots 4, 5, 6 and 7 are synchronized with the first synchronization pattern 100. Note that the synchronization pattern can be switched between the first and second synchronization patterns by the switch 16, and a slot corresponding to the switched synchronization pattern is associated. Next, the operation of the small wireless terminal 10 having received such a synchronization pattern will be described with reference to FIG.

  FIG. 8 is a flowchart showing a transmission operation of the small wireless terminal according to the first embodiment. Here, the operation of the small wireless terminal 10-1 corresponding to the slot 1 will be described. The other small wireless terminals 10 perform the same operation except that the corresponding slots and synchronization patterns are different.

  First, when the small wireless terminal 10-1 is turned on, biological information detected by the sensor 11 is sequentially input to the data control unit 12. The data control unit 12 switches the wireless unit 13 to the reception mode (S1). The radio unit 13 starts reading the synchronization pattern transmitted from the radio communication device 20, demodulates the received signal received, and inputs the demodulated signal to the data control unit 12 (S2). The data control unit 12 determines whether or not the input reception signal is the second synchronization pattern 200, and repeats the reception operation until the second synchronization pattern 200 is detected (S3). When the second synchronization pattern 200 is detected, the frame synchronization counter is corrected to establish frame synchronization (S4).

  Next, the data control unit 12 sets the time from the reception of the second synchronization pattern 200 to the slot 1 as a timer value based on the slot number (slot 1) corresponding to the small wireless terminal 10 (S5). Until the set timer value elapses, the system switches to the sleep mode and waits (S6, S7). The data control unit 12 determines the transmission timing based on the time-up of the set timer, switches the wireless unit 13 to the transmission mode (S8), and transmits the biological information input from the sensor 11 according to the specified format. At the same time (S9), the transmission time of the slot 1 is set as a timer value, and the completion of transmission is determined when the time is up (S10). The data control unit 12 that has determined the completion of transmission switches to the sleep mode (S11), sets the time from the completion of the slot 1 to the second synchronization pattern 200 as a timer value, and sets the next second synchronization pattern 200. Wait until reception timing (S12). Next, when the data control unit 12 determines the reception start timing due to the time-up of the set timer, the data control unit 12 returns to step S1 and repeats the above-described operation.

  By performing such an operation by the small wireless terminals 10-1 to 10-8, as shown in FIG. 7, it becomes possible to perform TDMA communication by using eight slots per frame, and each small wireless terminal. After receiving the synchronization pattern, the wireless terminal 10 has a time of at least one slot between the time from the start of data transmission and the time from the completion of data transmission to the reception of the synchronization pattern. In addition, such a frame configuration only increases the data amount for one synchronization pattern per frame, and does not significantly reduce the data transmission efficiency.

  In the above description, in the synchronization pattern detection determination (procedure S3), when the synchronization pattern is detected even once, the synchronization pattern detection determination is performed, but the rear protection circuit is mounted on the data control unit 12, The detection of the synchronization pattern may be determined when the synchronization pattern is continuously received a predetermined number of times (for example, 8 times). Thereby, malfunction due to noise or the like can be prevented. Further, a forward protection circuit may be mounted on the data control unit 12 and it may be determined that synchronization is lost when a synchronization pattern cannot be received a predetermined number of times (for example, 8 times). Thereby, erroneous determination due to instantaneous reception failure can be prevented.

  In the above description, the case where the eight small wireless terminals 10 and the wireless communication device 20 communicate in the same frequency band has been described. However, TDMA communication may be performed using a plurality of frequency bands. For example, by using two frequency bands, it is possible to perform communication by attaching 16 small wireless terminals 10 to the subject 1. In the above description, the case where one frame is composed of 8 slots has been described. However, the number of slots is not limited to this, and other slots may be used.

  As described above, in the first embodiment, a plurality of circularly polarized antennas 21 are arranged so as to have a small correlation, and space diversity is formed, thereby reducing a reception level due to mismatch of polarization planes. In addition to being able to reduce, the effect of space diversity makes it less susceptible to multipath fading and secures a good reception state.

  Also, the wireless communication device 20 arranges the first synchronization pattern 100 at the head of the frame, arranges the second synchronization pattern 200 in the middle of the frame, and transmits to the small wireless terminal 10, and transmits from the small wireless terminal 10. The small wireless terminal 10 receives the two types of frame synchronization patterns transmitted from the wireless communication device 20, and, among the received frame synchronization patterns, the small wireless terminal 10 receives the received data in synchronization with the frame synchronization pattern. Data transmission is performed in synchronization with a frame synchronization pattern that is not adjacent to the slot to which 10 is assigned, so that the synchronization pattern is received after the synchronization pattern is received and after the data transmission is completed. At least one slot or more will be available before the transmission and reception switching process before and after the synchronization slot. Without the speed, it is a wireless communication using time division multiplex communication. In addition, the transmission / reception switching time can be secured without significantly reducing the data transmission efficiency. Furthermore, since it is not necessary to perform high-speed processing and an inexpensive device can be used, the price of the small wireless terminal 10 can be expected to be reduced.

  In the present embodiment, the case where the antenna duplexer 22 is used to configure reception diversity and transmission diversity has been described. However, the present invention is not limited to this, and either circular polarization of reception or transmission is performed. Diversity may be configured using an antenna.

  Moreover, although the case where the linearly polarized antenna is used as the antenna 14 of the small wireless terminal 10 has been described in the present embodiment, the present invention is not limited to this, and the antenna 14 may be a circularly polarized antenna. As a result, even if the antenna of the radio communication device 20 on the receiving side is a linearly polarized antenna, it is possible to reduce a decrease in reception level due to polarization plane mismatch.

Embodiment 2. FIG.
As described in the first embodiment, the small radio terminal 10 is performed at a short distance (for example, about 5 m to 10 m), and the antenna gain and the output power are low. Therefore, for example, it is impossible to monitor the biological information of the subject 1 who exercises over a wide range in an athletic field. For this reason, in the second embodiment, in addition to the configuration of the first embodiment, a relay device 30 attached to the subject 1 is provided, and radio signals are relayed by the relay device 30 to expand the communication area. Is.

  FIG. 9 is a configuration diagram of the biological information monitoring system according to the second embodiment. In the figure, the biological information monitoring system according to the second embodiment includes, for example, a plurality of small wireless terminals 10 that are mounted on a subject 1 who moves on a track in an athletic stadium and has a sensor 11 that acquires biological information, A relay device 30 that is detachably attached to the subject 1 by the belt 3, amplifies and retransmits radio signals transmitted from a plurality of small radio terminals 10, and receives radio signals transmitted from the relay device 30, The wireless communication device 20 is configured to output the received information to the information processing device 2. The configurations of the small wireless terminal 10, the wireless communication device 20, and the information processing device 2 are the same as those in the first embodiment.

  FIG. 10 is a configuration diagram of a relay apparatus according to the second embodiment. In the figure, a relay device 30 includes a receiving antenna 31 that receives a signal transmitted from the small wireless terminal 10, an amplifier 32 that amplifies and outputs a received signal received via the receiving antenna 31, and an amplifier 32 that amplifies the signal. A transmission antenna 35 that transmits the transmitted signal, a control unit 33 that controls output power and amplification gain of the amplifier 32, and a battery 34 that supplies power to each device of the relay device 30. Each component device of the relay device 30 is housed in one housing and is attached to the subject 1 via the belt 3. Note that the reception antenna 31 and the transmission antenna 35 have as high a gain as possible, and may use either circular polarization or linear polarization.

  With the configuration as described above, in the second embodiment, the wireless signal transmitted from the small wireless terminal 10 is amplified by the relay device 30 and transmitted to the wireless communication device 20, so that it is attached to the subject 1. Even if the antenna 14 of the small wireless terminal 10 is downsized and the antenna gain and output power are low, a sufficient communication area between the small wireless terminal 10 and the wireless communication device 20 can be secured. The acquired biometric information can be monitored remotely. In addition, the small wireless terminal 10 can be expected to reduce power consumption because it is not necessary to increase transmission power.

  Furthermore, by attaching the relay device 30 to the subject 1 via the belt 3, the biological information can be acquired without impairing the motor function of the limb of the subject 1, and the biological information of the subject 1 can be monitored over a wide range. can do.

  In the present embodiment, the case where the radio signal transmitted from the small radio terminal 10 is received by one receiving antenna 31 has been described. However, the present invention is not limited to this, for example, as shown in FIG. A diversity receiving circuit 36 is provided, and space diversity is configured by a plurality of receiving antennas 31, and a signal wave having a high reception intensity is selected by the diversity receiving circuit 36, or each signal wave is combined and input to the amplifier 32. You may do it.

  In the present embodiment, the case where the received signal received via the receiving antenna 31 is amplified and output by the amplifier 32 has been described. However, the present invention is not limited to this. It is good also as a structure which retransmits to the communication apparatus 20. FIG.

  Further, the relay device 30 includes the time division multiple access device 25 described in the first embodiment. Each small wireless terminal 10 and the relay device 30 perform TDMA communication, and the received information is transmitted to the wireless communication device 20. It is good also as a structure which retransmits.

  In the present embodiment, the case where the relay device 30 is attached to the subject 1 using the belt 3 has been described. However, the present invention is not limited to this, and the relay device 30 may be attached to the subject 1. For example, the subject 1 may be worn using a backpack or the like.

  Furthermore, although the case where the relay apparatus 30 is attached to the subject 1 has been described in the present embodiment, the present invention is not limited to this, and the relay apparatus 30 may be within the communication range of the small wireless terminal 10. For example, a relay device 30 is installed in the vicinity of a subject 1 who does not move in a wide range within an athletic stadium and performs throwing competitions such as cannonball throwing, and a wireless communication device 20 is installed in a remote place such as a stand seat to monitor biological information. May be.

1 is a configuration diagram of a biological information monitor system according to Embodiment 1. FIG. 2 is a configuration diagram of a small wireless terminal according to Embodiment 1. FIG. 1 is a configuration diagram of a radio communication apparatus according to Embodiment 1. FIG. It is a figure which shows the frame structure which concerns on the conventional time division multiplex synchronization method. It is a figure which shows the transmission timing of each slot which concerns on the conventional time division multiplex synchronization method. 3 is a diagram showing a frame configuration according to Embodiment 1. FIG. 6 is a diagram showing transmission timing of each slot according to Embodiment 1. FIG. 4 is a flowchart showing a transmission operation of the small wireless terminal according to the first embodiment. 6 is a configuration diagram of a biological information monitoring system according to Embodiment 2. FIG. 6 is a configuration diagram of a relay device according to Embodiment 2. FIG. FIG. 6 is a configuration diagram of a relay device including a plurality of reception antennas according to Embodiment 2.

Explanation of symbols

1 subject, 2 information processing device, 3 belt, 10 small wireless terminal, 11 sensor, 12 data control unit, 13 wireless unit, 14 antenna, 15 battery, 16 switch, 20 wireless communication device, 21 circularly polarized antenna, 22 antenna Duplexer, 23 Transmitter circuit, 24 Diversity receiver circuit, 25 Time division multiple access device, 30 Relay device, 31 Receive antenna, 32 Amplifier, 33 Control unit, 34 Battery, 35 Transmit antenna, 36 Diversity receiver circuit, 100 1st Synchronization pattern, 200 Second synchronization pattern.

Claims (14)

A wireless terminal that is attached to a human body, acquires the biological information of the human body, and transmits the acquired biological information;
A biological information monitoring system comprising: a wireless communication device that receives the biological information transmitted from the wireless terminal. A wireless terminal that is attached to a human body, acquires the biological information of the human body, and transmits the acquired biological information;
A relay device that receives a radio signal transmitted from the radio terminal, amplifies the received radio signal, and transmits the radio signal;
A biological information monitoring system comprising: a wireless communication device that receives a wireless signal transmitted from the wireless terminal or the relay device and acquires the biological information.   The biological information monitoring system according to claim 2, wherein the relay device is attached to a human body on which the wireless communication terminal is attached. The wireless communication device
A plurality of circularly polarized antennas arranged at predetermined intervals;
A diversity receiving circuit to which a radio signal received by the circularly polarized antenna is input;
The biological information monitoring system according to claim 1, wherein the plurality of circularly polarized antennas constitute space diversity. The relay device is
A plurality of circularly polarized antennas arranged at predetermined intervals;
A diversity receiving circuit to which a radio signal received by the circularly polarized antenna is input;
The biological information monitoring system according to claim 2, wherein the plurality of circularly polarized antennas constitute space diversity.   6. The biological information monitoring system according to claim 4, wherein the diversity receiving circuit selects and outputs a signal having a high reception intensity among radio signals input from the plurality of circularly polarized antennas.   6. The biological information monitoring system according to claim 4, wherein the diversity receiving circuit synthesizes and outputs radio signals input from the plurality of circularly polarized antennas. The wireless communication device
The time slot multiplex communication is performed in synchronization with a plurality of the radio terminals to which the slots are assigned by assigning a plurality of slots to a frame having a predetermined time length in a time division manner. Biological information monitoring system according to the above. The wireless communication device transmits a plurality of frame synchronization patterns inserted between predetermined slots of the frame, receives data transmitted from the wireless terminal in synchronization with the frame synchronization pattern,
The wireless terminal receives a plurality of frame synchronization patterns transmitted from the wireless communication device, and performs data transmission in synchronization with a predetermined frame synchronization pattern among the received plurality of frame synchronization patterns. The biological information monitoring system according to claim 8, wherein:   The biological information monitoring system according to claim 8 or 9, wherein the wireless terminal is synchronized with a frame synchronization pattern that is not adjacent to the slot to which the wireless terminal is assigned, among the plurality of frame synchronization patterns. .   The biological information monitoring system according to any one of claims 8 to 10, wherein the wireless communication device inserts different types of frame synchronization patterns between the head of the frame and the middle of the frame. A time division multiplex synchronization method in which a plurality of slots are allocated in a time division manner to a frame having a predetermined time length, and a plurality of radio terminals to which the slots are allocated and a radio communication device communicate synchronously,
The wireless terminal receives a plurality of frame synchronization patterns transmitted from the wireless communication device, performs data transmission in synchronization with a predetermined frame synchronization pattern among the plurality of received frame synchronization patterns,
The wireless communication apparatus transmits a plurality of frame synchronization patterns inserted between predetermined slots of the frame, and receives data transmitted from the wireless terminal in synchronization with the frame synchronization pattern. Time division multiple synchronization method.   13. The time division multiplex synchronization method according to claim 12, wherein the wireless terminal is synchronized with a frame synchronization pattern that is not adjacent to a slot to which the wireless terminal is assigned, among the plurality of frame synchronization patterns. 14. The time division multiplex synchronization method according to claim 12, wherein the frame synchronization patterns are two types of frame synchronization patterns inserted between the head of the frame and the middle of the frame.

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