WO2008026586A1 - Appareil de relais hertzien - Google Patents

Appareil de relais hertzien Download PDF

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Publication number
WO2008026586A1
WO2008026586A1 PCT/JP2007/066663 JP2007066663W WO2008026586A1 WO 2008026586 A1 WO2008026586 A1 WO 2008026586A1 JP 2007066663 W JP2007066663 W JP 2007066663W WO 2008026586 A1 WO2008026586 A1 WO 2008026586A1
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WO
WIPO (PCT)
Prior art keywords
gain
base station
value
system margin
power value
Prior art date
Application number
PCT/JP2007/066663
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English (en)
Japanese (ja)
Inventor
Toshiaki Oodachi
Masafumi Shiohara
Masahiro Mitsuzuka
Original Assignee
Panasonic Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Panasonic Corporation filed Critical Panasonic Corporation
Priority to JP2008532068A priority Critical patent/JP4971332B2/ja
Publication of WO2008026586A1 publication Critical patent/WO2008026586A1/fr

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Classifications

    • 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
    • H04B7/15535—Control of relay amplifier gain
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to a wireless relay device that enables wireless communication in a poor radio wave environment such as indoors in mobile communication.
  • a wireless relay device is also referred to as a repeater or a booster, and is transmitted from a base station device in order to easily make a radio wave dead zone area a wireless communicable area (hereinafter sometimes referred to as "cover area"). It is a device that receives and amplifies a signal and transmits it in the cover area, and receives and amplifies a signal transmitted from a communication terminal device located in the power bar area and transmits it to the base station device. Then, the radio relay apparatus calculates the propagation loss value for the broadcast information power of the base station apparatus when amplifying, and performs amplification gain control (hereinafter referred to as “automatic gain control”) to compensate for this (non-patent document).
  • automatic gain control amplification gain control
  • the basic equation for automatic gain control of a radio repeater is: G as the gain of the radio repeater, PathL 0SS as the propagation loss value between the base station and the radio repeater, and ⁇ as the system margin. Then, it is shown by the following formula (1).
  • the noise figure of the relay device is the noise figure of the relay device.
  • the system margin ⁇ is a fixed value.
  • the fixed value is set based on the lowest received power value due to fading and other effects in order to enable wireless communication in the setting area even in a poor radio wave environment.
  • Non-Patent Document 1 NTT DoCoMo Technical Journal Vol.13 No3 “Development of Indoor FOM A Booster Device”
  • Patent Document 1 Japanese Patent Laid-Open No. 2001-69091
  • Patent Document 2 JP 2003-78463 A Disclosure of the invention
  • the system margin ⁇ force is a fixed value set based on the case where the received power value is the lowest, so if the received power value does not drop much, There is a problem that the cover area is wasted.
  • the present invention has been made in view of power and a point, and an object of the present invention is to provide a non-wire-to-wire connection device that can increase the cover area compared to the conventional art.
  • the radio relay apparatus of the present invention receives and amplifies the transmission signal from the base station apparatus and transmits it in the power bar area, and receives and transmits the transmission signal from the communication terminal apparatus located in the cover area.
  • a radio relay apparatus that amplifies and transmits to the base station apparatus, and calculates a propagation loss value based on the transmission power value of the common control channel of the base station apparatus and the reception power value of the common control channel from the base station apparatus Propagation loss calculation means, and the ratio of the received power value of the common control channel from the base station apparatus to the total received power value, the received power value of the common control channel from peripheral stations other than the base station apparatus, the magnitude of fading,
  • a system margin calculating means for measuring at least one of the frequencies of the base station apparatus and calculating a system margin based on at least one of the frequencies, and a propagation loss.
  • Value power comprising: a gain calculation means for calculating the gain by subtracting al system margin, and control means for performing automatic gain control with a gain, and,
  • the gain calculation means sets the gain to the median value of the variable gain range when the system margin is equal to or greater than a preset first threshold and equal to or less than a preset second threshold. It may be set.
  • FIG. 1 is a diagram showing an overall configuration of a mobile communication system including a radio relay apparatus according to Embodiment 1 of the present invention.
  • FIG. 2 is a block diagram showing a configuration of a radio relay apparatus according to Embodiment 1 of the present invention.
  • FIG. 3 A diagram for explaining the size of c / No when there is no communication terminal device in communication within the coverage area of the base station device
  • FIG. 4 A diagram for explaining the Ec / No size when there are four communication terminal devices in communication within the coverage area of the base station device
  • FIG. 5 is a diagram for explaining ⁇ 2 when three base station devices are arranged around the wireless relay device.
  • FIG.7 A graph showing the received power value of the wireless intermediate monitoring device at time T
  • FIG. 8 is a flowchart showing the operation of automatic gain control in the radio relay apparatus according to Embodiment 1 of the present invention.
  • FIG. 9 is a diagram for explaining the effect of adjusting the gain of the radio relay apparatus according to Embodiment 2 of the present invention to the median value.
  • FIG. 10 is a diagram showing the relationship between the gain and the received power value of the radio relay apparatus according to Embodiment 2 of the present invention.
  • FIG. 11 is a diagram showing the relationship between the gain and the received power value of the radio relay apparatus according to Embodiment 2 of the present invention.
  • FIG. 12 is a flowchart showing the operation of automatic gain control in the radio relay apparatus according to Embodiment 2 of the present invention.
  • a radio relay apparatus receives and amplifies a transmission signal from a base station apparatus, transmits the signal within a cover area, and transmits from a communication terminal apparatus located within the cover area. The signal is received, amplified, and transmitted to the base station apparatus.
  • the radio relay apparatus calculates a propagation loss value based on the transmission power value of the common control channel of the base station apparatus and the reception power value of the common control channel from the base station apparatus, and a total reception The ratio of the received power value of the common control channel from the base station apparatus to the power value, the received power value of the common control channel from peripheral stations other than the base station apparatus, the magnitude of fading, and the frequency of the base station apparatus
  • a system margin calculating means for measuring at least one and calculating a system margin based on the at least one; a gain calculating means for subtracting the system margin to calculate a gain; and a gain.
  • Control means for performing automatic gain control.
  • the system margin is set to a fixed value based on the case where the reception power value is the lowest, whereas in the wireless relay device of one embodiment of the present invention, The system margin calculation means determines the ratio of the received power value of the common control channel from the base station apparatus to the total received power value, the received power value of the common control channel from peripheral stations other than the base station apparatus, the magnitude of fading, and Then, at least one of the frequencies of the base station apparatus is measured, and a system margin is calculated based on at least one of the frequencies. Accordingly, since an appropriate system margin ⁇ can be calculated according to the environment of the wireless relay device, it is possible to avoid setting the system margin ⁇ to an excessively large value.
  • the gain calculation means calculates gain G by subtracting the system margin ⁇ from the propagation loss value according to the above equation (1), and the control means performs automatic gain control using the gain G. Since a is not set to an excessively large value, the gain G can be increased as compared with the conventional case. If the gain G can be increased, the cover area can be increased. As a result, the radio relay apparatus according to the embodiment of the present invention can have a wider cover area than the conventional radio relay apparatus.
  • FIG. 1 is a diagram showing an overall configuration of a mobile communication system including a radio relay apparatus according to Embodiment 1 of the present invention.
  • the mobile communication system shown in FIG. 1 includes a wireless relay device 100 installed indoors in a small closed space dead zone area such as an underground store or an office, a communication terminal device 200 such as a mobile phone used indoors, Base station device 400 installed outdoors and Have.
  • Radio relay apparatus 100 performs radio communication with a communication terminal apparatus via indoor antenna 310 for communication terminal apparatus, and performs radio communication with base station apparatus 400 via RF coaxial cable 320 and outdoor antenna 330. Do. Specifically, radio relay apparatus 100 amplifies the radio signal transmitted from communication terminal apparatus 200 and received by antenna 310, and re-radiates to base station apparatus 400 via RF coaxial cable 320 and outdoor antenna 330. By doing so, the received power value of base station apparatus 400 is supplemented. Radio relay apparatus 100 amplifies the radio signal transmitted from base station apparatus 400 and received by outdoor antenna 330 and RF coaxial cable 320, and re-radiates it to communication terminal apparatus 200 via indoor antenna 310. Thus, the received power value of communication terminal apparatus 200 is supplemented.
  • FIG. 2 is a block diagram showing a configuration of radio relay apparatus 100.
  • the wireless relay device 100 includes an outdoor antenna terminal 101, an indoor antenna terminal 102, a duplexer 103, a duplexer 104, a distributor 105, a downlink signal radio unit 110, and an uplink signal.
  • Radio section 120, propagation loss calculation section 130, system margin calculation section 140, gain calculation section 150, and gain control section 160 are provided.
  • the downlink signal radio unit 110 includes a low noise amplifier 111, a variable attenuator 112, and an amplifier 113
  • the uplink signal radio unit 120 includes a low noise amplifier 121, a variable attenuator 122, and an amplifier 123.
  • Outdoor antenna terminal 101 connects RF coaxial cable 320 of outdoor antenna 330 that transmits and receives signals to and from base station apparatus 400 installed outdoors.
  • the indoor antenna terminal 102 connects an indoor antenna 310 that transmits and receives signals to and from the communication terminal device 200 used indoors.
  • Duplexer 103 outputs a transmission signal from base station apparatus 400 input from outdoor antenna terminal 101 to distributor 105, and from communication terminal apparatus 200 amplified by uplink signal radio section 120. Output signal to the outdoor antenna terminal 101.
  • Duplexer 104 outputs the transmission signal from communication terminal apparatus 200 output from indoor antenna terminal 102 to uplink signal radio section 120 and transmits from the base station apparatus amplified by downlink signal radio section 110. The signal is output to the indoor antenna terminal 102.
  • Distributor 105 inputs a transmission signal from base station apparatus 400 from duplexer 103, and receives a downlink signal. Distribution is performed to No. radio unit 110, propagation loss calculation unit 130, and system margin calculation unit 140.
  • Downlink signal radio section 110 amplifies the transmission signal from base station apparatus 400 output from distributor 105 under the control of gain control section 160 and outputs the amplified signal to duplexer 104.
  • the low noise amplifier 111 amplifies the transmission signal from the base station apparatus 400 output from the duplexer 103 with a specified amplification factor.
  • the variable attenuator 112 attenuates the signal output from the low noise amplifier 111 by varying the attenuation rate according to the control of the gain control unit 160.
  • the amplifier 113 amplifies the signal output from the variable attenuator 112 with a specified amplification factor.
  • Uplink signal radio section 120 amplifies the transmission signal from communication terminal apparatus 200 output from duplexer 104 according to the control of gain control section 160, and outputs the amplified signal to duplexer 103.
  • the low noise amplifier 121 amplifies the transmission signal from the communication terminal apparatus 200 output from the duplexer 104 by a specified amplification factor.
  • the variable attenuator 122 attenuates the signal output from the low noise amplifier 121 by varying the attenuation rate according to the control of the gain control unit 160.
  • the amplifier 123 amplifies the signal output from the variable attenuator 122 with a specified amplification factor.
  • Propagation loss calculation section 130 uses the transmission power value (Tx.Power) of the common control channel from base station apparatus 400 based on broadcast information included in the transmission signal of base station apparatus power output from distributor 105, And the information indicating the received power value (RSCP) of the common control channel of the radio relay apparatus 100, and the propagation loss value (PathLoss) is calculated by the following equation (2) based on Tx_P 0wer and RSCP. Output to gain calculation section 150.
  • Tx_Power and RSCP are defined in “3GPP standard TS 25.215”.
  • system margin calculation section 140 calculates the ratio of energy per desired wave chip to in-band received power density ratio (Ec / N0). ) Is calculated, system margin ⁇ is calculated based on Ec / N0, etc., and output to gain calculation section 150. A specific description of the calculation of the system margin ⁇ will be described later.
  • the gain calculation unit 150 performs wireless relaying according to the above equation (1) based on the propagation loss value output from the propagation loss calculation unit 130 and the system margin ⁇ output from the system margin calculation unit 140.
  • the gain G of device 100 is calculated and output to gain control section 160.
  • Gain control section 160 controls the amplification gains of uplink signal radio section 120 and downlink signal radio section 110 based on the gain value calculated by gain control section 160.
  • the system margin ⁇ is an important factor that determines the operating conditions for automatic gain control in the uplink and downlink circuit designs.
  • the system margin ⁇ is calculated in consideration of the downlink.
  • the system margin ⁇ may be calculated in consideration of the uplink as well as the downlink.
  • the transmission power value of the common control channel of the base station apparatus is L (BS) and the transmission power value of the common control channel of the radio relay apparatus is L (RE)
  • the system margin ⁇ is given by ).
  • Tx_Power is equal to L (BS).
  • the transmission power value L (RE) of the common control channel of the radio relay apparatus is expressed by the following equation (4).
  • the margin D with respect to the maximum transmission power value in the operating state is expressed by the following equation (5), where the maximum transmission power value of the radio relay apparatus is ⁇ .
  • Element 1 Hope wave Energy ratio per chip to received power density in band (Ec / NO): ⁇ 1
  • Element 2 Power of incoming waves from peripheral stations other than base station equipment: ⁇ 2
  • force S illustrating the case of calculating margin D and system margin ⁇ using ⁇ 1, ⁇ 2, ⁇ 3, and ⁇ 4, the present invention is not limited to this. If ⁇ 1 and ⁇ 2, the same effect as the present invention can be obtained.
  • the calculation method of the margin D and the system margin ⁇ is not limited to the following method, and can be calculated as appropriate.
  • the margin D can be expressed by the following equation (7), for example.
  • the margin elements of ⁇ 1, ⁇ 2, ⁇ 3, and ⁇ 4 in Equation (3) are monitored by the wireless relay device 100, and the optimum margin D and system margin ⁇ are calculated based on these. In addition, optimum automatic gain control can be performed.
  • Ec is the reception power value (equal to RSCP) of the common control channel (pilot channel) from base station apparatus 400
  • NO is the total reception power value received by the radio relay apparatus.
  • Ec / NO is described as Ec / Io on page 10 of the 3GPP standard (3GPP TS 25. 133 V3.2.20 (2005-09)), for example.
  • System margin calculating section 140 and propagation loss calculating section 130 of radio relay apparatus 100 measure Ec / NO from a signal transmitted from a predetermined base station apparatus, and calculate ⁇ 1 according to the following equation (8). .
  • FIG. 3 shows the power of a given base station device. It is a figure for demonstrating the magnitude
  • FIG. 4 is a diagram for explaining the magnitude of Ec / No when there are four communicating terminal devices in communication within the coverage area of a predetermined base station device.
  • the magnitude of energy transmitted by the base station apparatus is 400 base station apparatus 400 power, This is the power value of the common control channel.
  • radio relay apparatus 100 since radio relay apparatus 100 receives the common control channel and the noise of radio relay apparatus 100 itself, Ec / No is the power value of the common control channel and the noise of radio relay apparatus 100 itself. It is expressed as the sum of.
  • the magnitude of energy transmitted by the base station apparatus is It is the sum of the power value of the common control channel from the device 400 and the transmission power for communication from the base station device 400 to the four communication terminal devices.
  • the radio relay apparatus 100 since the radio relay apparatus 100 receives the common control channel, a transmission signal for communication with the four communication terminal apparatuses, and the noise of the radio relay apparatus 100 itself, Ec / No is the common It is expressed as the sum of the power value of the control channel, the transmission power for communication with the four communication terminal devices, and the noise of the radio relay device 100 itself.
  • the system margin calculation unit 140 and the propagation loss calculation unit 130 of the wireless relay device 100 are common to signals transmitted from the desired base station device and peripheral stations. Measure the received power value (RSCP) of the control channel and subtract the received power value (RSCP) of the common control channel from the desired base station device to calculate ⁇ 2.
  • RSCP received power value
  • FIG. 5 is a diagram for explaining ⁇ 2 when three base station apparatuses (A station, B station, and C station) are arranged around a specific radio relay apparatus 100.
  • the power values (RSCP) of the common control channel received by radio relay apparatus 100 from station A, station B, and station C are AdBm, BdBm, and CdBm (A> B> C), respectively.
  • the desired base station is the station with the highest received power value of the common control channel, so the desired base station is station A, and stations B and C are peripheral stations.
  • the peripheral station is a base station apparatus that is equal to or greater than the reception power limit value of radio relay apparatus 100 and less than the reception power value from desired base station A station.
  • ⁇ 2 is the sum of received power values (RSCP) of the common control channel from the desired base station A station and the peripheral stations B and C. Since it is a value obtained by subtracting the power value, it is expressed by the following equation (9). The total is calculated by changing dBm to the true value and performing the addition.
  • RSCP received power values
  • This element reflects the effects of fading (including multipath effects). There are both fast fading (short interval fluctuation) and slow fading (long interval fluctuation), and ⁇ 3 may be determined by the force that focuses on slow fading and the force that focuses on fast fading.
  • FIG. 6 is a diagram for explaining fast fading and slow fading.
  • the horizontal axis is time, and the vertical axis is gain.
  • the outdoor antenna when the reception power value of the common control channel is high, it can be considered that the outdoor antenna can be installed in a place where the base station apparatus can see. In this case, the fading is considered to be small and the slow fading is considered to be ⁇ 3. In this case, ⁇ 3 is several dB.
  • the received power value of the common control channel when the received power value of the common control channel is low, it can be considered that an outdoor antenna is installed at a location away from the base station apparatus. In this case, the value of ⁇ 3 is increased because of fading. However, if ⁇ 3 is too large due to the effects of fast fading, the profit will be reduced, so care must be taken.
  • FIG. 7 shows the received power value (RSCP) of the common control channel of the radio intermediate measuring device 100 at time T.
  • the vertical axis represents the received power value (RSCP) of the common control channel, and the horizontal axis represents time.
  • System margin calculation section 140 and propagation loss calculation section 130 of radio relay apparatus 100 detect the received power value (RSCP) of the common control channel as shown in FIG. Next, the median value or average value (R (T)) of the received power value of the common control channel is calculated from the detection result of the received power value of the common control channel, and the maximum received power value of the common control channel is calculated. Detects the maximum value (MaxR). Next, ⁇ 3 is calculated according to the following equation (10).
  • base station equipment Depends on how many different frequencies the station 400 transmits.
  • System margin calculating section 140 and propagation loss calculating section 130 of radio relay apparatus 100 measure the received power value (RSCP) of the common control channel and detect how many frequencies are included. Assuming that the number of detected frequencies is N, the true number is converted to dB from the following equation (11), and ⁇ 4 is calculated.
  • RSCP received power value
  • the reception power of the common control channel of the wireless intermediate monitor device increases by 3 dB.
  • the system margin ⁇ can be obtained with high accuracy, and appropriate automatic gain control becomes possible.
  • S indicates each step of the flow.
  • the timing for performing the automatic gain control includes, for example, when the radio relay apparatus is activated or when the fluctuation range of RSCP or Ec / N 0 within a predetermined time is larger than a predetermined reference value.
  • step S1 broadcast information is received from the base station apparatus.
  • Tx_P 0wer , RSCP, and Ec / NO are extracted from the broadcast information received in step S2. In addition, it can detect even if it is operated by a base station device.
  • step S3 PathLoss is calculated based on Tx_Power and RSCP.
  • step S4 the extent of fading is predicted by RSCP, and the value of each element is determined.
  • step S5 the system margin ⁇ is calculated by the method described above from the values of the above elements.
  • Step S6 the signal is amplified according to the gain based on step S6.
  • radio relay apparatus 100 includes system margin calculation unit 140 that calculates system margin ⁇ , so that system margin ⁇ is sequentially set to an optimal value.
  • the system margin is a fixed value set based on the case where the received power value is the lowest, whereas in the radio relay apparatus 100, the system margin ⁇ is increased. It can be set to an optimal value. Therefore, for example, when the electric field strength in the area where the wireless relay device 100 is installed fluctuates, the system margin can be set to an optimum value according to the electric field strength without setting it to an excessively large value.
  • the gain G of the equation can be made sufficiently large. As a result, the coverage area of the wireless relay device can be made wider than before.
  • the radio relay device 100 is in operation, for example, at a system margin every predetermined time.
  • Radio relay apparatus 100 may have a minimum limit value and a maximum limit value of system margin ⁇ in system design. When the system margin ⁇ exceeds the minimum limit value or the maximum limit value, the radio relay apparatus 100 is forcibly stopped. Whether or not to forcibly stop may be determined in consideration of whether the system margin ⁇ exceeds the minimum limit value or the maximum limit value for a predetermined time or exceeds a predetermined number of times.
  • an optimum cover area can be provided.
  • a function for automatically adjusting the gain control parameter so as to maximize the cell breathing function will be described.
  • the transmission power value of radio relay apparatus 100 can be set in advance.
  • the wireless relay device 100 Performs control to bring the gain closer to the median of the variable gain range of 55 dB.
  • FIG. 9 is a diagram for explaining the effect of matching the gain of radio relay apparatus 100 according to the present embodiment to the median value of the variable gain range, with time on the horizontal axis and gain on the vertical axis.
  • the system margin ⁇ needs to be decreased in order to suppress interference of the base station apparatus 400 when the radio relay apparatus 100 is in an over-input state. Further, in a weak electric field state, it is necessary to increase the gain in order to maintain the area range covered by the wireless relay device 100. As described above, the radio relay apparatus 100 cannot always execute the anti-seizing control for making the gain approach the median value of the variable gain range. Therefore, as shown in the following formula (12), the system margin ⁇ force is over the threshold specified from the excess input.
  • the wireless relay device 100 When the threshold value TH is less than the threshold TH defined by the weak electric field, the wireless relay device 100 is variable.
  • Control is performed to bring the gain closer to the median value of the gain range.
  • 10 and 11 are diagrams illustrating the relationship between the gain of the radio relay apparatus 100 and the received power value.
  • the transmission power value of the radio relay apparatus 100 is lOdBm according to the above formula (5).
  • system margin ⁇ is 20 dB from the above equation (6).
  • the graph 601 showing the gain and the received power value shown in FIG. 10 shifts to the right (thick solid line graph 701 in FIG. 11).
  • the gain of the wireless relay device 100 may be between the graph 601 and the graph 701.
  • the wireless relay device 100 is 55 dB, which is the median value of the variable gain range. Control the gain so that
  • S indicates each step of the flow.
  • the radio relay apparatus 100 determines the cover area and the common control channel transmission power value of the radio relay apparatus 100.
  • the timing for performing automatic gain control includes when the radio relay device is started or when the fluctuation range of RSCP and Ec / NO within a predetermined time is larger than a predetermined reference value.
  • step S 11 broadcast information is received from the base station apparatus.
  • Tx_P 0 was extracted from the broadcast information received in step S 12.
  • Ec / NO is extracted from the broadcast information received in step S 12.
  • it can detect even if the number is f / w when operating on the base station equipment.
  • step S13 PathLoss is calculated based on Tx_Power and RSCP.
  • step S14 the extent of fading is predicted by RSCP, and the value of each element is determined.
  • step S15 the system margin ⁇ is calculated by the method described above based on the value of each element.
  • step S16 the system margin ⁇ force is greater than or equal to the threshold value, or less than or equal to the threshold value.
  • step S16 If it is mm max (step S16; YES), the gain is controlled so as to approach the median value of the variable gain range in step S17.
  • the system margin ⁇ force is smaller than the threshold TH or
  • step S18 when larger than the threshold TH (step S16; NO), in step S18, PathLos max
  • step S 19 signal amplification is performed according to the gain based on step S 17 or step S 18.
  • the self-breathing prevention control for setting the gain to the median value of the variable gain range is executed, the cell breathing function can be maximized.
  • the gain control parameters can be adjusted automatically.
  • the force using the name of the radio relay device is for convenience of explanation, and may be a repeater, a booster, or the like.
  • each circuit unit constituting the wireless relay device is not limited to the above-described embodiments.
  • the present invention is suitable for use in a radio relay apparatus that receives, amplifies, and transmits a signal to be transmitted and received between a base station apparatus and a communication terminal apparatus.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Relay Systems (AREA)

Abstract

L'invention concerne un appareil de relais hertzien pouvant établir une valeur optimum de la marge du système en considération de l'atteinte d'un évanouissement, réduisant ainsi la consommation de puissance redondante. Dans cet appareil de relais hertzien, une partie de calcul d'une perte de propagation (130) calcule, sur la base des valeurs de puissance de transmission et de réception au niveau d'un appareil de station de base, une valeur de perte de propagation. Une partie de calcul de marge du système (140) calcule, sur la base d'un rapport entre l'énergie par circuit intégré d'onde souhaité et une densité de puissance de réception intra-bande (Ec/N0) et autres, une marge du système (α). Une partie de calcul de gain (150) calcule, sur la base de la valeur de perte de propagation provenant de la partie de calcul de perte de propagation (130) et de la marge du système (α) provenant de la partie de calcul de marge du système (140), un gain de l'appareil de relais hertzien (100). Une partie de contrôle de gain (160) contrôle, sur la base de la valeur du gain calculée par la partie de calcul de gain (150), le gain d'amplification d'une partie de signal radio descendant (110) et celui d'une partie de signal radio montant (120).
PCT/JP2007/066663 2006-08-29 2007-08-28 Appareil de relais hertzien WO2008026586A1 (fr)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014003680A (ja) * 2008-05-13 2014-01-09 Qualcomm Incorporated ダウンリンク送信電力の自己較正
JP7470176B1 (ja) 2022-12-26 2024-04-17 Kddi株式会社 不要波の増幅を抑制する無線レピータ、制御方法、及びプログラム
JP7543166B2 (ja) 2021-02-24 2024-09-02 株式会社日立国際電気 無線伝送システム

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0615353A1 (fr) * 1993-03-09 1994-09-14 Alcatel Mobile Communication France Procédé de contrôle de puissance du paquet d'accès émis par un mobile dans un système de radiocommunication, et système mettant en oeuvre ce procédé
US20020168995A1 (en) * 2001-05-14 2002-11-14 Interdigital Technology Corporation Common control channel uplink power control for adaptive modulation and coding techniques
EP1530304A1 (fr) * 2003-11-07 2005-05-11 NTT DoCoMo, Inc. Station de base et procédé de commande de la puissance de transmission dans un système de télécommunication mobile

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0615353A1 (fr) * 1993-03-09 1994-09-14 Alcatel Mobile Communication France Procédé de contrôle de puissance du paquet d'accès émis par un mobile dans un système de radiocommunication, et système mettant en oeuvre ce procédé
US20020168995A1 (en) * 2001-05-14 2002-11-14 Interdigital Technology Corporation Common control channel uplink power control for adaptive modulation and coding techniques
EP1530304A1 (fr) * 2003-11-07 2005-05-11 NTT DoCoMo, Inc. Station de base et procédé de commande de la puissance de transmission dans un système de télécommunication mobile

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
FUJIMOTO S. ET AL.: "Okunaiyo FOMA Booster Sochi no Kaihatsu", NTT DOCOMO TECHNICAL JOURNAL, vol. 13, no. 3, 1 October 2005 (2005-10-01), pages 25 - 30, XP003021285 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014003680A (ja) * 2008-05-13 2014-01-09 Qualcomm Incorporated ダウンリンク送信電力の自己較正
CN104540206A (zh) * 2008-05-13 2015-04-22 高通股份有限公司 下行链路发射功率的自校准
US9386541B2 (en) 2008-05-13 2016-07-05 Qualcomm Incorporated Self calibration of downlink transmit power
JP7543166B2 (ja) 2021-02-24 2024-09-02 株式会社日立国際電気 無線伝送システム
JP7470176B1 (ja) 2022-12-26 2024-04-17 Kddi株式会社 不要波の増幅を抑制する無線レピータ、制御方法、及びプログラム

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