WO2004098207A2 - 無線中継器 - Google Patents
無線中継器 Download PDFInfo
- Publication number
- WO2004098207A2 WO2004098207A2 PCT/JP2004/006150 JP2004006150W WO2004098207A2 WO 2004098207 A2 WO2004098207 A2 WO 2004098207A2 JP 2004006150 W JP2004006150 W JP 2004006150W WO 2004098207 A2 WO2004098207 A2 WO 2004098207A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- antenna
- base station
- terminal
- relay device
- wireless relay
- Prior art date
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
- H04B7/1555—Selecting relay station antenna mode, e.g. selecting omnidirectional -, directional beams, selecting polarizations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/10—Polarisation diversity; Directional diversity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15564—Relay station antennae loop interference reduction
- H04B7/15571—Relay station antennae loop interference reduction by signal isolation, e.g. isolation by frequency or by antenna pattern, or by polarization
Definitions
- the present invention relates to a radio communication system using a ⁇ DMA system in which frequency bands used in a transmission channel and a reception channel are close to each other, and relates to a radio relay device used to supplement a weak electric field area as a communication area. . Background art
- the TDMA wireless relay device 1 When relaying radio waves in a wireless communication system using the TDMA (Time Division Multiple Access) method, the TDMA wireless relay device 1 has two wireless units 2 A and 2 B as shown in Figure 17 It is necessary to carry out communication with the base station 3 on one radio unit 2A and to communicate with the terminal 4 on the other radio unit 2B at the same time.
- the demodulated signal received and demodulated by the receiving unit (not shown) of the radio unit 2A from the base station 3 via the base station antenna 5A is transmitted from the base station 3 to the base station 3B of the radio unit 2B (see FIG. (Not shown), is subjected to radio frequency conversion as an idiom signal in this section, and then transmitted to the terminal 4 via the terminal antenna 5B.
- the demodulated signal received and demodulated by the receiving unit (not shown) of the radio unit 2B from the terminal 4 via the terminal antenna 5B is transmitted to the transmitting unit (not shown) of the radio unit 2A.
- the signal After being converted to a transmission signal by the radio frequency in this section, the signal is transmitted to the base station 3 via the base station antenna 5A.
- Fig. 18 of the PHS Personal Handyphone System
- communication is performed using four time slots (hereinafter, abbreviated as slots) each for uplink and downlink.
- slots time slots
- the reception sensitivity of reception slot Br1 is suppressed by unnecessary radiation from antenna 5A in slot At1. Occurs.
- the wireless relay device 1 in order to prevent the suppression of the reception sensitivity to the other wireless device due to unnecessary radiation emitted by the one wireless device, the other wireless device transmits at the same time as the other wireless device. I tried not to receive it in the machine.
- a part of the transmission output goes from the transmitting antenna to the receiving antenna, causing
- a wireless relay device having a function of suppressing occurrence of a frequency by a frequency offset (for example, Japanese Patent Application Laid-Open No. H11-112402).
- the other radio unit In order to prevent the suppression of reception sensitivity to the other radio unit due to unnecessary radiation emitted from one radio unit, the other radio unit should not receive at the timing of transmission by the other radio unit.
- the conventional wireless relay device at the timing when one of the radios transmits and the other radio transmits, the other radio needs to be in a standby state or a weekly state. Make the standby state and the communication state: ⁇ , The number of lines that can be accommodated or the communication speed per wireless relay device is reduced by half.
- the other when one of the two systems of radio equipment mounted in the radio relay device transmits, the other transmits, and when one receives, the other also receives.
- the transmission / reception timing is reversed, so that transmission / reception is delayed.
- an IF operation system that extracts an IF signal and controls a phase, an amplitude, and a delay time to suppress a wraparound component, and an RF signal that is extracted by a coupler and similarly controlled.
- the configuration was complicated, such as providing an RF operation system that suppressed the pressure at ⁇ . Disclosure of the invention
- the present invention has been made in view of the above points, and an object of the present invention is to reduce the suppression of the receiving sensitivity to the other H-free device due to unnecessary radiation emitted from one radio, and to reduce Another object of the present invention is to provide a radio relay device capable of increasing the number of lines that can be accommodated per relay device or the communication speed.
- the invention according to claim 1 is used in a radio communication system using a TDMA system, in which frequency bands used for channels and reception channels are close to each other, and a base station.
- a base station antenna for transmitting and receiving radio waves to and from a terminal
- a wireless relay device including an antenna device having a terminal antenna
- the antenna device includes a base station antenna.
- the antenna is characterized in that the direction of the plane of polarization is different from the direction of the plane of polarization of the antenna for the terminal.
- the invention according to claim 2 is used in a radio communication system using a TDMA system, in which frequency bands used in a transmission channel and a reception channel are close to each other.
- a base station antenna for transmitting and receiving radio waves to and from a base station, and a wireless relay device including an antenna device having a terminal antenna, wherein the antenna device includes the base station antenna and the terminal.
- the antennas are oriented so that they are oriented in the null direction.
- the invention according to claim 3 is used in a radio communication system using the TDMA scheme, in which frequency bands used in a transmission channel and a reception channel are close to each other, and is a base station for transmitting and receiving radio waves between a base station and a terminal.
- a wireless relay device including an antenna device having a station antenna and a terminal antenna, the antenna device includes a non-directional antenna as the base station antenna and a directional antenna as the terminal antenna. It is characterized in that each is used.
- the invention according to claim 4 is used in a wireless communication system using the TDMA scheme, in which frequency bands used in transmission channels and reception channels are close to each other, and is a base station for transmitting and receiving radio waves between a base station and a terminal.
- a wireless relay device including an antenna device having a station antenna and a terminal antenna, the antenna device uses a directional antenna as the base station antenna and the terminal antenna, respectively. It is characterized in that the directivity directions are different.
- the invention according to claim 5 is used in a wireless communication system using a TDMA system in which frequency bands used in a channel and a reception channel are close to each other, for transmitting and receiving radio waves between a base station and a terminal.
- a wireless relay device provided with an antenna device having an antenna for a base station and an antenna for a terminal, the antenna device is configured to output one or both of the antenna for the base station and the antenna for the terminal from the device main body.
- a special feature is that both antennas are separated from each other by connecting to the derived coaxial cable.
- the invention according to claim 6 is used in a wireless communication system using the TDMA scheme, in which frequency bands used in a transmission channel and a reception channel are close to each other, and is a base station for transmitting and receiving radio waves between a base station and a terminal.
- the wireless relay device includes: a base station antenna; an antenna feed line corresponding to the terminal antenna; Connection means for detachably connecting the A fourth antenna device, that is, a first antenna device installed with the direction of the polarization plane of the base station antenna different from the direction of the polarization plane of the terminal antenna; the base station antenna And a second antenna device in which the terminal antennas are arranged so as to be in null directions with respect to each other; a non-directional antenna is used as the base station antenna, and a directional antenna is used as the terminal antenna.
- a third antenna device a directional antenna is used for each of the base station antenna and the terminal device antenna, and any one of the fourth antenna devices installed in different directional directions is used.
- One or both of the antennas are connected to a coaxial cable derived from the main body of the device, and provided at a position away from the main body of the antenna. It is specially designed to be connected in a special way.
- the invention according to claim 7 is the invention according to claim 6, wherein the antenna selecting means for selecting an optimum antenna apparatus based on a communication error rate and a received electric field strength in an installation environment, and the antenna apparatus selected by the antenna selecting means. And a means for notifying the user.
- the invention according to claim 8 is used in a wireless communication system using the TDMA system, in which frequency bands used in the speech channel and the reception channel are close to each other, and is a base station for transmitting and receiving radio waves between a base station and a terminal.
- a wireless relay device provided with an antenna device having a station antenna and a terminal antenna, the wireless relay device may be configured such that the terminal antenna has an antenna feed line in which an attenuator is inserted. Special.
- the invention according to claim 9 is used in a radio communication system using the TDMA system, in which frequency bands used in a speech channel and a reception channel are close to each other, and is a base station for transmitting and receiving radio waves between a base station and a terminal.
- a wireless relay device provided with an antenna device having an antenna for a station and an antenna for a terminal, the wireless relay device receives a transmission radio wave from a base station via the antenna for a base station.
- Reception error detection means for detecting an error
- Control means for adjusting the transmission power of a transmission unit for transmitting a radio wave via the terminal antenna based on the error situation.
- the invention according to claim 10 is used in a radio communication system using a TDMA system in which frequency bands used in a transmission channel and a reception channel are close to each other, for transmitting and receiving radio waves between a base station and a terminal.
- the radio relay apparatus monitors the slot usage rate, and transmits and receives the data to the base station and the terminal.
- the radio relay apparatus includes an antenna for a base station and an antenna apparatus having an antenna for a terminal. It is characterized by having slot control means for selecting slots to be used so that timings do not overlap.
- the invention according to claim 11 is used in a wireless communication system using a TDMA system in which frequency bands used in a channel and a reception channel are close to each other, and transmits and receives radio waves between a base station and a terminal.
- any one of the antenna devices selected from the above a first antenna device installed with the direction of the plane of polarization of the antenna for the base station different from the direction of the plane of polarization of the antenna for the terminal; A second antenna device in which an antenna for a base station and the antenna for a terminal are arranged so as to be in null directions with respect to each other; a non-directional antenna as the antenna for the base station A third antenna device using a directional antenna as the terminal antenna; a directional antenna as the base station antenna and the terminal antenna, and different directional antennas. And a fourth antenna device installed as a second group of antenna devices.
- the antenna device for the base station and the other antenna device for the terminal device are both omnidirectional antennas, and the slot utilization is monitored. When the slot utilization is less than 50%, the antenna device of the second group is selected and switched. On the other hand, when the slot utilization exceeds 50%, the antenna device of the first group is selected. And antenna switching means for switching.
- the invention according to claim 12 is used in a radio communication system using a TDMA scheme, in which frequency bands used in a transmission channel and a reception channel are close to each other, and a base station and a terminal.
- a wireless relay device including an antenna for a base station for transmitting and receiving radio waves to and from an end device, and an antenna device having an antenna for a terminal device, wherein the wireless relay device has two antennas.
- Measurement means for measuring the reception level of radio waves arriving from a plurality of peripheral base stations for each antenna, and an antenna capable of receiving more base stations at a high level from the measurement results of the measurement means.
- the isolation between the antenna for the base station and the antenna for the terminal is increased, the suppression of the reception sensitivity due to the self-interference wave is reduced, and the number of storable lines or communication speed per one wireless relay device is increased.
- the invention of claim 7 has an effect that an optimum antenna device that can obtain the above effects can be known.
- the invention of claim 8 reduces unnecessary radiation to the antenna for the base station, reduces the influence of unnecessary radiation from the antenna for the base station, reduces the suppression of reception sensitivity due to self-interfering waves, and reduces This has the effect of increasing the number of storable lines per relay device or the communication speed.
- the invention of claim 9 has the effect of reducing the suppression of the reception sensitivity due to the self-interference wave to the antenna for the base station, and increasing the number of storable lines or the communication speed per one wireless relay device. .
- the invention of claim 10 has an effect that it is possible to reduce the suppression of the receiving sensitivity due to the self-interfering wave and to increase the number of storable lines or the communication speed per one wireless relay device.
- switching to an antenna device according to the installation environment enhances isolation, reduces reception sensitivity suppression due to self-interference, reduces the number of storable lines per one radio relay device or communication.
- the effect is that the speed can be increased.
- the invention of claim 12 can generally keep the effect of unnecessary radiation at a high reception level at the antenna for the base station, thereby reducing the effect of suppression of reception sensitivity, and reducing the influence of one radio relay device. It is possible to increase the number of lines that can be accommodated or the communication speed It has the effect of becoming.
- FIG. 1 is a perspective view of a wireless relay device according to Embodiment 1 of the present invention.
- FIG. 2 is a # ⁇ view of the wireless relay device according to the second embodiment of the present invention.
- FIG. 3 is a perspective view of a wireless relay device according to Embodiment 3 of the present invention.
- FIG. 4 is a perspective view of a wireless relay device according to Embodiment 4 of the present invention.
- FIG. 5 is a perspective view of a wireless relay device according to Embodiment 5 of the present invention.
- FIG. 6 is a perspective view of the wireless relay device according to the sixth embodiment of the present invention with the antenna device removed.
- FIG. 7 is a circuit configuration diagram of a wireless relay device according to Embodiment 7 of the present invention.
- FIG. 8 is a flowchart for explaining the above operation.
- FIG. 9 is a circuit configuration diagram of a wireless relay device according to Embodiment 8 of the present invention.
- FIG. 10 is a perspective view of a wireless relay device according to Embodiment 9 of the present invention.
- FIG. 11 is a circuit configuration diagram of the wireless relay device according to Embodiment 10 of the present invention.
- FIG. 12 is a circuit configuration diagram of the wireless relay device according to Embodiment 11 of the present invention.
- FIG. 13 is a flowchart for explaining the above operation.
- FIG. 14 is a circuit configuration diagram of the wireless relay device according to Embodiment 12 of the present invention.
- FIG. 15 is a circuit configuration diagram of the wireless relay apparatus according to Embodiment 13 of the present invention.
- FIG. 16 is a flowchart for explaining the above operation.
- FIG. 17 is a diagram of a communication system using a wireless relay device.
- FIG. 18 is a timing chart of time slots used in the above communication system. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 shows an external view of a wireless relay device 1 of the present embodiment.
- Two wireless units (not shown) are housed in a device main body 10 similarly to the wireless relay device 1 shown in FIG. However, both sides of the main unit 4 are connected to the antenna feed line of the radio unit for the base station.
- the antenna 5A for a monopole base station and the antenna 5B for a monopole terminal connected to the antenna feed line of the radio base for the terminal are attached to the antenna unit of the wireless relay device 1. There is a feature.
- the polarization plane of the antenna 5A for the base station is oriented vertically, and the polarization plane of the antenna 5B for the terminal is oriented horizontally.
- the antenna 5A for the base station is vertically polarized and the antenna 5B for the terminal is horizontally polarized, so that the isolation between the antennas 5A and 5B is enhanced, This reduces reception sensitivity suppression due to interference waves, and increases the number of lines or communication speed that can be accommodated per wireless relay device.
- the reason why the antenna 5A for the base station 5A is vertically polarized is that the base station normally uses a vertically polarized antenna, and the radio wave from the base station becomes the radio wave from the terminal as viewed from the wireless relay device 1. This is to make it easier to receive radio waves from base stations because they are weaker.
- both antennas 5A and 5B are directly used! Although a polarized antenna is used, even if the polarization is changed using a circularly polarized antenna, the isolation can be similarly increased and the suppression of the reception sensitivity due to self-interference can be reduced.
- an antenna device in which the polarization plane of the antenna 5A for the base station and the polarization plane of the antenna 5B for the terminal station are different is used.
- the present embodiment as shown in FIG. It is characterized in that it uses an antenna device in which antennas 5A for base stations and antennas 5B for terminals are arranged horizontally on both sides of the upper surface of each other in the null direction.
- the antenna 5A for the base station and the antenna 5B for the terminal are directed toward each other in the null direction, so that the isolation between the antennas 5A and 5B is increased, and the reception sensitivity due to the self-interference wave is increased. Suppression is reduced, and the number of lines or communication speed that can be accommodated per wireless relay device can be increased.
- a radio unit for the base station and a radio unit for the terminal are housed in the device main body 10, as in the case shown in FIG.
- an omnidirectional dipole-type base station antenna 5A provided vertically on one side surface of the device main body 10 of the wireless relay device 1, and a device main body 10
- an antenna device including an antenna 5B for a terminal having directivity, which is provided by a patch antenna provided on the other side of the antenna is used.
- the antenna 5A for the base station is an omnidirectional antenna
- the antenna 5B for the terminal is a directional antenna, so that the antennas 5A and 5B use the nondirectional antennas.
- the isolation between antennas 5A and 5B is increased, while suppressing the reception sensitivity due to self-interfering waves, while maintaining the same relay capability as that of the existing wireless repeater.
- the number or communication speed can be increased.
- a radio unit for the base station and a radio unit for the terminal are housed in the apparatus main body 10 as shown in FIG.
- a base station antenna 5A and a terminal antenna 5B each of which has a directional patch antenna provided on both sides of the device main body 10 of the wireless relay device 1, are provided.
- the feature is that the configured antenna device is used.
- the antenna 5A for the base station and the antenna 5B for the terminal are both directional antennas, so that the isolation between the antennas 5A and 5B is increased, and the reception sensitivity due to the self-interference wave is increased. Suppression is reduced, and the number of lines that can be accommodated per wireless relay device or the communication speed can be increased.
- Embodiments 1 to 4 described above have a structure in which the antennas 5A and 5B are attached to the apparatus main body 10; this embodiment is directed to a base station radio provided in the apparatus main body 10 as shown in FIG.
- the coaxial cable 6A is led out from one side of the device body 10 by connecting to the antenna feed line of the main unit (not shown), and the antenna 5A for base station is connected to the end of the coaxial cable 6A.
- a coaxial cable 6B is led out from the other side of the apparatus main body 10 as an antenna feed path of a radio unit for a terminal (not shown) provided in the apparatus main body 10, and the coaxial cable 6 Connect the terminal antenna 5 B to the end of B.
- an antenna device is used in which both antennas 5A and 5B are installed apart from each other.
- patch antennas having directivity are used as the antennas 5A and 5B as in the fourth embodiment.
- the isolation between the antennas 5A and 5B is further improved, and the suppression of the reception sensitivity due to the self-interference wave is reduced. It is possible to increase the number of lines that can be accommodated per one wireless relay device or the communication speed.
- the antenna device to be used may be any of the antenna devices according to the first to third embodiments.
- the form of the antenna device used was determined in advance, but in this embodiment, as shown in FIG. 6, the antenna device is provided on one of both side surfaces of the device main body 10 of the wireless relay device 1.
- a connector 7B for connecting the antenna to the antenna feed line is provided, while connectors 8A and 8B are connected to the antennas 5A and 5B, so that the antennas 5A and 5B can be detached and used.
- the antenna device to be connected can be selected and connected.
- the desired isolation cannot be obtained with the antenna device of the first embodiment depending on the installation environment, and ⁇ is replaced by the antenna device of the fifth embodiment to reduce the self-interference wave. Therefore, it is possible to reduce the suppression of reception sensitivity due to the above, and to increase the number of lines that can be accommodated or the communication speed per wireless relay device.
- the antenna devices of Embodiments 2 to 4 may be used depending on the installation environment.
- the first to fourth antenna devices shown in the embodiments:! To 4 can be connected to the connection connector 7A, and the 5A and 5B shown in the fifth embodiment can be connected to the connection connector 7B. It has a configuration.
- the antenna device to be used can be selected according to the installation environment.
- the most suitable antenna device to be selected and used is automatically determined. It is provided with an antenna selecting means for dynamically notifying.
- a device level 10 for measuring the electric field strength of the radio unit 2 A connected to the base station antenna 5 A is provided in the device main body 10 of the radio relay device 1.
- An antenna selection means comprising a reception error component 12 for counting the number of reception errors per unit time, an optimum antenna determination unit 13 and a buzzer 14 is provided.
- FIG. 8 shows a judgment flow of the optimum antenna judgment unit 13.
- the buzzer 14 sounds the buzzer 14 to notify the request for replacement to the antenna device with the better isolation.
- reception level is 30 dB / V or more: ⁇
- ⁇ it is checked whether the reception level is less than 40 dBV (S5).
- reception level is less than 4 ⁇ dB At V and the error rate is less than 1%
- a check is made to determine whether or not the power is low (S6).
- the buzzer 14 notifies the buzzer 14 that the antenna device has not been changed (S7). If the error rate is 1% or more in the check of S6, it is further checked whether the error rate is less than 10% (S8). If the error rate is less than 10%, the isolation is performed.
- the buzzer 14 informs the buzzer 14 of the call to the antenna device that is one step better (S9).
- the buzzer 14 informs the buzzer 14 of a request to replace the antenna device with two-stage better isolation (S10). If the received level is 40 ⁇ ⁇ ⁇ V or more in the above check of S5, check whether the error rate is less than 1% (S11). If it is less than 1%, two levels of isolation are performed. A notification to the good antenna device is notified by the buzzer 14 notification sound (S12). Then, if the error rate is 1% or more in the check of S11, it is further checked whether the error rate is less than 10%, and (S13), the error rate is less than 10%. If so, the buzzer 14 informs the buzzer 14 of a request for replacement of the antenna device with two-stage better isolation (S 14).
- the buzzer 14 informs the buzzer 14 of the notification to the antenna device that the isolation is three-step better (S15). Note that instead of step S12, a step of notifying that the antenna change is unnecessary may be performed as in steps S3 and S7. ( ⁇ Please note that the priority does not have to be valid.)
- the notification of the necessity of replacement of the currently connected antenna device and the notification of the exchange ⁇ include the notification of the antenna device with good isolation from the currently connected antenna device.
- an antenna device that is optimal for the installation environment, reduce the suppression of reception sensitivity due to self-interfering waves, and increase the number of lines or communication speed that can be accommodated in one wireless relay device. Becomes possible.
- the optimum antenna device is notified by the notification sound of the buzzer 14 .
- a display device 15 including a liquid crystal display or the like for notification is provided.
- the optimum antenna determination unit 13 controls the display of the display device 15 based on the determination, and notifies the display by displaying a picture or character corresponding to the determination.
- the display device 15 is provided with a circuit for generating pictures, characters, and the like.
- the optimal antenna can be used, and Therefore, it is possible to increase the number of lines that can be accommodated per wireless relay device or the communication speed.
- the antenna device in which the combination of the base station antenna 5A and the terminal antenna 5B can reduce reception sensitivity suppression due to self-interfering waves is used.
- an antenna device using a vertically polarized monopole antenna is used for both the base station antenna 5A and the terminal antenna 5B as in the conventional case.
- an attenuator 16 is inserted in the antenna feed line of the terminal antenna 5B.
- the attenuator 16 by inserting the attenuator 16 into the antenna 5B for the terminal, the effect of the interfering wave from the antenna 5A for the base station is reduced, and the antenna 5 for the mobile terminal 5A is reduced. Interference waves emitted from B can also be reduced.
- a radio unit for the base station and a radio unit for the terminal are housed in the device main body 10, as in the case shown in FIG.
- Embodiments 1 to 8 described above use an antenna device in which the combination of the base station antenna 5A and the terminal antenna 5B is one that can reduce the suppression of reception sensitivity due to self-interfering waves.
- the antenna sensitivity is reduced by the self-interference by inserting Athens 16 into the antenna power supply path of Andena 5B for terminal equipment.
- This embodiment is shown in Fig. 11.
- both antennas 5A for base stations and antennas 5B for terminals use antenna devices using vertically polarized monopole antennas as in the past.
- a variable gain amplifier 17 was used as a transmission amplifier, and the gain of the variable gain amplifier 17 was used as a base.
- Radio unit for station 2 A side If the communication error in the terminal increases, it is reduced and the transmission power is reduced, so that it is emitted from the terminal antenna 5B without lowering the reception sensitivity. The feature is that interference waves are reduced.
- a reception error counting section 12 for counting FER from a demodulated signal received and demodulated;
- the error counted by the level measurement unit 11 and the reception error force unit 12 exceeds a preset threshold, the reception level of the reception wave is sufficiently high V, but the FER is large.
- the transmission section 21 of the wireless section 2B for the terminal is provided with a transmission signal generation section 2 which takes in the demodulated signal received and demodulated by the reception section 20 of the radio section 2A and generates it as a speech signal.
- a transmission signal generator 21 A frequency converter 23 for converting one of the speech signals into a radio frequency, and the variable gain amplifier 17 described above, and the transmission output of the variable gain amplifier 17 is switched between transmission and reception. Power is supplied to the terminal antenna 5B via the switch 24.
- the terminal antenna 5B is connected to the receiving unit 24 by the switching operation of the transmission / reception switching switch 23 at the time of reception, so that the reception unit 25 receives and demodulates the radio signal from the base station.
- the radio unit 2A also includes a reception unit 20, a transmission unit 18, and a transmission / reception switch (not shown), but the gain is fixed at the transmission output amplification amplifier of the transmission unit 18.
- the used pump is used. Therefore, if the number of communication errors in the base station radio unit 2A exceeds the threshold value due to the movement of people around the installation location or the movement of furniture, the measurement level of the reception level measurement unit 11
- the gain controller 19 controls the gain of the variable gain amplifier 17 so as to decrease to a predetermined level, and lowers the transmission power of the radio unit 2B for the terminal. This makes it possible to reduce self-interfering waves emitted from the terminal antenna 5B without lowering the reception sensitivity of the radio unit 2A.
- the number of communication errors in the base station radio unit 2 A has decreased below the threshold: ⁇ , the gain of the variable gain amplifier 17 in the gain control unit 19, and the measurement level of the reception level measurement unit 11 It is possible to broaden the communication area by greatly controlling the level to a predetermined level and increasing the power.
- the suppression of the reception sensitivity due to the self-interfering wave of the base station antenna 5A is reduced, and the number of lines that can be accommodated per one wireless relay device or the communication speed is reduced. It is possible to increase the degree.
- the slot allocated by the base station is detected from the signal received by the receiving unit 20 of the radio unit 2A for the base station, and the used slot is determined by the terminal.
- the use slot notification unit 26 for notifying the radio unit 2B for the terminal and the word unit 2 of the radio unit 2B for the terminal based on the notification from the slot notification unit 26. It is characterized by the provision of a slot control unit 27 that determines the slot to be used in 1.
- the antenna 5A for the base station and the antenna 5B for the terminal are both the same as in the past, as in the past. Uses an antenna device that uses an antenna.
- the slot control unit 27 communicates with the base station. It is checked whether the number of used slots is 3 or more or less than 3 (S 1).
- the number of slots used in the PHS of this embodiment is four, as described with reference to FIG. If the used slot is less than 3, that is, less than 2 slots and the usage rate is 50% or less, the slot control unit 27 notifies the used slot notifying unit 26 of the slot used for the base station. (S 2), and an unused slot for the base station is arbitrarily allocated to the terminal based on the result of the inquiry (S 3).
- the assignment is completed and used: use the above unused slot for the terminal in ⁇ Switch as a slot (S5).
- the number of slots used in communication with the base station is 3 or more, that is, the usage rate exceeds 50%.
- 3 ⁇ 4 ⁇ An empty slot is arbitrarily selected as a slot used for communication with the terminal (S6). Then, the slot assignment to the transmission unit 21 is completed.
- the slot usage rate in communication with the base station is 50% or less, suppression of reception sensitivity due to transmission on the terminal side does not occur, and the communication speed can be increased.
- the slot used by the terminal is allocated and controlled by the slot utilization rate in communication with the base station.
- the slot utilization rate is less than 50%: ⁇ is the omnidirectional antenna 5A1, 5B1 as the second group of antenna devices.
- the slot utilization exceeds 50%.
- the switching switches 28A and 28B are driven so as to use one of the antenna devices or the switch device including the antennas 5A2 and 5B2 with the coaxial cable as described in the fifth embodiment. There is a feature in that a configuration is added.
- directional patch antennas are used as the antennas 5A2 and 5B2 with the coaxial cape holes 6A and 6B, but the antennas for the base station side and the wireless terminal side are used. As long as the wireless interference between them can be suppressed, the antenna device of any one of the first to fourth embodiments may be used.
- any of the antenna devices of Embodiments 1 to 4 is used as the antenna device of the first group, and the conventional omnidirectional antenna is used. It is possible to maintain the same relay-possible error as the wireless relay device using the antennas 5A and 5B. If the slot utilization exceeds 50%, the antenna device of the second drop By using this, it is possible to reduce the suppression of the reception sensitivity of self-interfering waves, and to increase the number of lines that can be accommodated or the communication speed per wireless repeater.
- two radio units 2A and 2B are respectively provided with reception level measurement units 11A and 1IB, and these reception level measurement units 11A and 1B are provided.
- the reception levels of the radio units 2A and 2B at the antennas 5A and 5B are notified to the base station direction determination unit 29 together with the base station ID, and the base station direction determination unit 29 based on the notification result.
- the direction of the base station is determined in advance. That is, one antenna 5 is an antenna 5A for the base station, the other antenna 5 is an antenna 5B for the terminal, and the radio units 2 and 2 are 2A for the base station and 2B for the terminal.
- the radio waves from the peripheral base stations are received by the two radio units 2 and 2 and received.
- a peripheral base station search for notifying the reception level measured by the level measuring sections 11 and 11 and the received base station ID to the base station direction determining section 21 is started (S 1), and the The edge base station search is executed continuously for a fixed time.
- the base station direction determination unit 21 counts the number of base stations at or above the standby level (for example, 35 dB / V or more) for each radio unit based on the notification results corresponding to both antennas 5 and 5. (S2, S3), and then compare the number A, B of base stations that can be awaited by both radio units (S4), and use the antenna 5 with the larger number of base stations as an antenna for base stations, The smaller antenna is set as the antenna for the terminal, and the search for nearby base stations is completed (S5, S6).
- the standby level for example, 35 dB / V or more
- the present invention is used in a wireless relay device used to supplement a weak electric field area as a communication area in a wireless communication system using a TDMA system in which frequency bands used in a channel and a reception channel are close to each other.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Radio Relay Systems (AREA)
- Mobile Radio Communication Systems (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Support Of Aerials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2003124240A JP4529375B2 (ja) | 2003-04-28 | 2003-04-28 | 無線中継装置 |
JP2003-124240 | 2003-04-28 |
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WO2004098207A2 true WO2004098207A2 (ja) | 2004-11-11 |
WO2004098207A3 WO2004098207A3 (ja) | 2005-02-24 |
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PCT/JP2004/006150 WO2004098207A2 (ja) | 2003-04-28 | 2004-04-28 | 無線中継器 |
Country Status (3)
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JP (1) | JP4529375B2 (ja) |
CN (1) | CN1792045A (ja) |
WO (1) | WO2004098207A2 (ja) |
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WO2011047616A1 (zh) * | 2009-10-19 | 2011-04-28 | 华为技术有限公司 | 一种中继方法、设备和*** |
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US8078100B2 (en) | 2002-10-15 | 2011-12-13 | Qualcomm Incorporated | Physical layer repeater with discrete time filter for all-digital detection and delay generation |
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CN1720755B (zh) | 2002-12-16 | 2010-05-05 | 高通股份有限公司 | 改进的无线网络中继器及其操作方法 |
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JP2007201855A (ja) * | 2006-01-27 | 2007-08-09 | Maspro Denkoh Corp | デジタル放送再送信装置 |
EP1895681A1 (fr) * | 2006-09-04 | 2008-03-05 | E-Blink | Système de transmission de données sans fil entre une station de base et une station de relais dans un réseau de téléphonie mobile |
WO2008036401A2 (en) | 2006-09-21 | 2008-03-27 | Qualcomm Incorporated | Method and apparatus for mitigating oscillation between repeaters |
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EP2119042A2 (en) * | 2007-03-02 | 2009-11-18 | QUALCOMM Incorporated | Use of a filterbank in an adaptive on-channel repeater utilizing adaptive antenna arrays |
WO2009026741A1 (fr) * | 2007-08-29 | 2009-03-05 | Alcatel Shanghai Bell Company, Ltd. | Procédé et dispositif pour un précodage distribué |
JP5073517B2 (ja) * | 2008-01-29 | 2012-11-14 | パナソニック株式会社 | Mimoアンテナ装置及びそれを備えた無線通信装置 |
JP4611401B2 (ja) * | 2008-05-30 | 2011-01-12 | 日本電業工作株式会社 | アンテナ装置 |
US8711047B2 (en) | 2009-03-13 | 2014-04-29 | Qualcomm Incorporated | Orthogonal tunable antenna array for wireless communication devices |
FR2956934B1 (fr) | 2010-02-26 | 2012-09-28 | Blink E | Procede et dispositif d'emission/reception de signaux electromagnetiques recus/emis sur une ou plusieurs premieres bandes de frequences. |
JP5538022B2 (ja) * | 2010-03-29 | 2014-07-02 | 京セラ株式会社 | 中継装置およびその製造方法 |
CN102118206A (zh) * | 2011-02-23 | 2011-07-06 | 尚雪峰 | 一种基于广播原理的照明设备无线组网方法和*** |
FR2990315B1 (fr) | 2012-05-04 | 2014-06-13 | Blink E | Procede de transmission d'informations entre une unite emettrice et une unite receptrice |
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- 2004-04-28 CN CN 200480011562 patent/CN1792045A/zh active Pending
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Also Published As
Publication number | Publication date |
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WO2004098207A3 (ja) | 2005-02-24 |
JP4529375B2 (ja) | 2010-08-25 |
JP2004328666A (ja) | 2004-11-18 |
CN1792045A (zh) | 2006-06-21 |
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