WO2017110029A1 - Wireless communication apparatus, wireless communication system, and wireless communication method - Google Patents

Wireless communication apparatus, wireless communication system, and wireless communication method Download PDF

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Publication number
WO2017110029A1
WO2017110029A1 PCT/JP2016/004799 JP2016004799W WO2017110029A1 WO 2017110029 A1 WO2017110029 A1 WO 2017110029A1 JP 2016004799 W JP2016004799 W JP 2016004799W WO 2017110029 A1 WO2017110029 A1 WO 2017110029A1
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WIPO (PCT)
Prior art keywords
wireless transmission
baseband signal
wireless
signal
baseband
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PCT/JP2016/004799
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French (fr)
Japanese (ja)
Inventor
琢爾 飯塚
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日本電気株式会社
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Publication of WO2017110029A1 publication Critical patent/WO2017110029A1/en

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

Definitions

  • the present invention relates to a wireless communication device, a wireless communication system, and a wireless communication method, for example, a wireless communication device, a wireless communication system, and a wireless communication method suitable for efficient wireless communication.
  • Patent Document 1 discloses a technique related to an interface between a baseband processing device (BBU (Base Band Unit)) and a radio device (RRH (Remote Radio ⁇ Head)) constituting a base station device.
  • BBU Base Band Unit
  • RRH Remote Radio ⁇ Head
  • the configuration disclosed in Patent Document 1 transmits IQ data between a baseband processing device and a wireless device via a CPRI transfer path (wired).
  • the configuration of Patent Document 1 has a problem that the cost for arranging a cable such as an optical cable increases.
  • Patent Document 2 discloses a transmission method of IQ data between a baseband processing device (BBU (Base Band Unit)) and a wireless device (RRH (Remote Radio Head) constituting a base station device. As described above, a wireless transmission method is used.
  • BBU Base Band Unit
  • RRH Remote Radio Head
  • wireless transmission using a high-level modulation method is usually performed on a wireless transmission path between a baseband processing device and a wireless device. This enables wireless transmission at a wireless transmission rate that is equal to or higher than the required IQ data transmission rate.
  • the communication quality of the wireless transmission path is deteriorated due to external factors such as rainy weather, there is a problem that wireless transmission using a high multilevel modulation method becomes difficult.
  • the present invention has been made to solve such problems, and provides a wireless communication apparatus, a wireless communication system, and a wireless communication method capable of efficient wireless communication according to the communication quality of a wireless transmission path.
  • the purpose is to do.
  • a wireless communication device includes: a baseband processing unit that outputs a compressed compressed baseband signal; a first signal wireless transmission unit that transmits the compressed baseband signal as a wireless signal; A second signal wireless transmission unit that receives a compressed baseband signal by wireless transmission; and a wireless unit that transmits a wireless signal based on the compressed baseband signal received by the second signal wireless transmission unit.
  • the wireless communication apparatus includes a wireless unit that compresses a baseband signal corresponding to a wireless signal received wirelessly and outputs a compressed baseband signal, and the compressed baseband signal is a wireless signal.
  • a second signal wireless transmission unit that transmits the compressed baseband signal, a first signal wireless transmission unit that receives the compressed baseband signal by wireless transmission, and the compressed baseband signal received by the first signal wireless transmission unit.
  • a baseband processing unit that performs predetermined processing by decoding.
  • a wireless communication device includes a baseband processing device that generates a first baseband signal, and a first wireless transmission device that modulates the first baseband signal into a first microwave and wirelessly transmits the first baseband signal. And a second wireless transmission device that demodulates the first microwave received wirelessly via a wireless transmission path with the first wireless transmission device into the first baseband signal, and a demodulation by the second wireless transmission device A wireless device that modulates the first baseband signal thus generated into a first high-frequency signal and wirelessly transmits the signal to the outside, wherein the baseband processing device has a compression rate according to communication quality in the wireless transmission path.
  • the first wireless transmission device compresses the first baseband signal, and the first wireless transmission device uses the modulation method according to the communication quality in the wireless transmission path to convert the compressed first baseband signal to the first wireless baseband signal. To modulate the microwave.
  • a wireless communication device includes: a baseband processing device that generates a first baseband signal; and first and second divided baseband signals obtained by dividing the first baseband signal.
  • a first wireless transmission device that modulates the first divided baseband signal into a first microwave and wirelessly transmits the first wireless transmission device, and a second wireless transmission device that modulates the second divided baseband signal into a second microwave and wirelessly transmits the modulated signal
  • a third wireless transmission device that demodulates a first microwave received wirelessly via a first wireless transmission path between the first wireless transmission device and the first divided baseband signal, and the second wireless transmission
  • a fourth wireless transmission device that demodulates the second microwave received wirelessly via the second wireless transmission path to the device into the second divided baseband signal; and demodulated by the third and fourth wireless transmission devices Is A wireless device that modulates the first baseband signal reproduced by combining the first and second divided baseband signals into a first high-frequency signal and wirelessly transmits the first high-frequency signal to the outside; And the first baseband signal or the first and second
  • a wireless communication method includes generating a first baseband signal by a baseband processing device, modulating the first baseband signal to a first microwave, and wirelessly transmitting the first baseband signal, Demodulating the first microwave received wirelessly into the first baseband signal; and modulating the demodulated first baseband signal into a first high frequency signal and wirelessly transmitting to the outside,
  • the first baseband signal is compressed at a compression rate according to the communication quality of the wireless transmission path through which the microwave is transmitted, and a modulation method according to the communication quality in the wireless transmission path is used.
  • the compressed first baseband signal is modulated into the first microwave.
  • a wireless communication method includes: generating a first baseband signal; and first and second divided baseband signals obtained by dividing the first baseband signal. Modulating the divided baseband signal to a first microwave and wirelessly transmitting; modulating the second divided baseband signal to a second microwave and wirelessly transmitting; and receiving the first microwave received wirelessly Demodulating the first divided baseband signal, demodulating the second microwave received wirelessly to the second divided baseband signal, and combining the first and second divided baseband signals to reproduce Modulating the first baseband signal thus obtained into a first high-frequency signal and wirelessly transmitting the signal to the outside, through a wireless transmission path through which microwaves are transmitted.
  • the first baseband signal or the first and second divided baseband signals are compressed at a compression rate according to quality, and using a modulation scheme according to the communication quality of the wireless transmission path,
  • the compressed first and second divided baseband signals are modulated into the first and second microwaves, respectively.
  • the embodiment it is possible to provide a wireless communication device, a wireless communication system, and a wireless communication method capable of efficient wireless communication according to the communication quality of the wireless transmission path.
  • FIG. 1 is a block diagram showing a wireless communication apparatus according to a first exemplary embodiment.
  • FIG. 3 is a block diagram of a base station apparatus according to a second embodiment. It is a figure which shows the relationship between the compression rate and modulation system of IQ data, and a radio transmission rate. It is a table
  • FIG. 3 is a block diagram illustrating a specific configuration example of a baseband processing device provided in the base station device illustrated in FIG. 2 and a wireless transmission device on the baseband processing device side.
  • FIG. 3 is a block diagram illustrating a specific configuration example of a wireless device provided in the base station device illustrated in FIG.
  • FIG. 10 is a block diagram illustrating a specific configuration example of a baseband processing device provided in the base station device illustrated in FIG. 9 and a wireless transmission device on the baseband processing device side.
  • FIG. 10 is a block diagram illustrating a specific configuration example of a wireless device provided in the base station device illustrated in FIG. 9 and a wireless transmission device on the wireless device side.
  • FIG. 6 is a block diagram illustrating a specific configuration example of a wireless device and a wireless transmission device on a wireless device side provided in a second modification of the base station device illustrated in FIG. 2. It is a figure which shows the structural example of the signal of the Ethernet standard applied in the structure shown in FIG.13 and FIG.14.
  • FIG. 7 is a block diagram of a base station apparatus according to a third embodiment.
  • FIG. 17 is a block diagram showing a first specific configuration example of two radio transmission apparatuses provided on the baseband processing apparatus side of the base station apparatus shown in FIG. 16. It is a block diagram which shows the 2nd specific structural example of the radio transmission apparatus provided in the baseband processing apparatus side of the base station apparatus shown in FIG.
  • FIG. 17 is a block diagram illustrating a third specific configuration example of the radio transmission apparatus provided on the baseband processing apparatus side of the base station apparatus illustrated in FIG. 16.
  • FIG. 6 is a block diagram of a base station apparatus according to a fourth embodiment.
  • FIG. 21 is a block diagram illustrating a specific configuration example of a baseband processing device provided in the base station device illustrated in FIG. 20 and a wireless transmission device on the baseband processing device side.
  • FIG. 21 is a block diagram illustrating a specific configuration example of a radio apparatus provided in the base station apparatus illustrated in FIG. 20 and a radio transmission apparatus on the radio apparatus side.
  • FIG. 21 is a block diagram illustrating a specific configuration example of a baseband processing device and a wireless transmission device on the baseband processing device side in a modification of the base station device illustrated in FIG. 20.
  • FIG. 21 is a block diagram illustrating a specific configuration example of a radio apparatus and a radio transmission apparatus on the radio apparatus side in a modification example of the base station apparatus illustrated in FIG. 20. It is a block diagram which shows the structural example of the base station apparatus which concerns on embodiment.
  • the constituent elements are not necessarily essential unless otherwise specified or apparently essential in principle.
  • the shapes when referring to the shapes, positional relationships, etc. of the components, etc., the shapes are substantially the same unless otherwise specified, or otherwise apparent in principle. And the like are included. The same applies to the above numbers and the like (including the number, numerical value, quantity, range, etc.).
  • FIG. 1 is a block diagram of a base station apparatus (wireless communication apparatus) 10 according to the first embodiment.
  • base station apparatus 10 according to the present embodiment, a baseband signal is compressed at a compression rate corresponding to the communication quality of the wireless transmission path between the baseband processing unit and the wireless unit, and wireless transmission is performed.
  • a desired wireless transmission rate can be maintained, so that efficient wireless communication is possible. This will be specifically described below.
  • the base station apparatus 10 performs wireless communication with a user terminal (not shown).
  • a radio communication system such as C-RAN is configured by the base station apparatus 10 and user terminals.
  • the user terminal is, for example, a mobile terminal such as a mobile phone or a notebook PC.
  • the base station device 10 includes a baseband processing unit 20, a radio unit 30, a first signal radio transmission unit 40 and a first radio transmission unit 40 for wirelessly transferring data between the baseband processing unit 20 and the radio unit 30. 2 signal wireless transmission units 50.
  • the baseband processing unit 20 generates a baseband signal based on data received from a host device (not shown), and then compresses the baseband signal to output a compressed baseband signal.
  • the first signal wireless transmission unit 40 modulates the compressed baseband signal output from the baseband processing unit 20 into a microwave and wirelessly transmits it.
  • the second signal wireless transmission unit 50 wirelessly receives the microwave transmitted from the first signal wireless transmission unit 40.
  • the second signal wireless transmission unit 50 demodulates the wirelessly received microwave into a compressed baseband signal. Then, the second signal radio transmission unit 50 outputs this compressed baseband signal to the radio unit 30.
  • the radio unit 30 decodes the compressed baseband signal output from the second signal radio transmission unit 50, modulates the compressed baseband signal into a high frequency signal, and wirelessly transmits the signal to the outside.
  • the wireless transmission path L1 between the first signal wireless transmission units 40 and 50 uses a high-value modulation method. Wireless transmission is performed. This enables wireless transmission at a wireless transmission rate that is equal to or higher than the required transmission rate of the baseband signal.
  • the baseband processing unit 20 compresses the baseband signal at a compression rate corresponding to the communication quality of the wireless transmission path L1, and outputs a compressed baseband signal.
  • the baseband processing unit 20 compresses the baseband signal by switching from the low magnification to the high magnification compression rate. As a result, even when the communication quality of the wireless transmission path L1 is deteriorated, the wireless transmission rate can be maintained at or higher than the required transmission rate of the baseband signal, so that reliable wireless communication is possible.
  • the baseband processing unit 20 compresses the baseband signal by switching from the high magnification to the low magnification.
  • the baseband signal can be modulated into a microwave by switching from the low-multilevel modulation system to the high-multilevel modulation system, high-quality wireless communication is possible.
  • the radio unit 30 demodulates a high-frequency signal received wirelessly from the outside into a baseband signal, and then compresses the baseband signal to output a compressed baseband signal.
  • the second signal wireless transmission unit 50 modulates the compressed baseband signal output from the wireless unit 30 into a microwave and wirelessly transmits it.
  • the first signal radio transmission unit 40 wirelessly receives the microwave transmitted from the second signal radio transmission unit 50.
  • the first signal wireless transmission unit 40 demodulates the wirelessly received microwave into a compressed baseband signal. Then, the first signal radio transmission unit 40 outputs the compressed baseband signal to the baseband processing unit 20.
  • the baseband processing unit 20 decodes the compressed baseband signal output from the first signal radio transmission unit 40 and performs predetermined processing. For example, the baseband processing unit 20 outputs the processing result to a higher-level device (not shown).
  • the radio unit 30 compresses the baseband signal at a compression rate corresponding to the communication quality of the radio transmission path L1 between the first signal radio transmission units 40 and 50, and outputs the compressed baseband signal.
  • the wireless unit 30 compresses the baseband signal by switching from a low magnification to a high magnification compression rate. As a result, even when the communication quality of the wireless transmission path L1 is deteriorated, the wireless transmission rate can be maintained at or higher than the required transmission rate of the baseband signal, so that reliable wireless communication is possible.
  • the wireless unit 30 compresses the baseband signal by switching from the high magnification to the low magnification compression rate.
  • the baseband signal can be modulated into a microwave by switching from the low-multilevel modulation system to the high-multilevel modulation system, high-quality wireless communication is possible.
  • FIG. 2 is a block diagram of the base station device (wireless communication device) 1 according to the second embodiment.
  • the baseband signal is compressed at a compression rate corresponding to the communication quality of the radio transmission path between the baseband processing apparatus and the radio apparatus, and the communication quality of the radio transmission path
  • the baseband signal after compression is modulated into a microwave by using a modulation method according to the above, and then wirelessly transmitted.
  • a desired wireless transmission rate can be maintained, so that efficient wireless communication is possible. This will be specifically described below.
  • the base station apparatus 1 corresponds to the base station apparatus 10 of FIG. 1 and performs wireless communication with a user terminal (not shown).
  • a radio communication system such as C-RAN is configured by the base station apparatus 1 and user terminals.
  • the user terminal is, for example, a mobile terminal such as a mobile phone or a notebook PC.
  • the base station device 1 includes a baseband processing device (BBU) 2 corresponding to the baseband processing unit 20, a radio device (RRH) 3 corresponding to the radio unit 30, and between the baseband processing device 2 and the radio device 3.
  • BBU baseband processing device
  • RRH radio device
  • the wireless transmission device 4 (corresponding to the first signal wireless transmission unit 40) and the wireless transmission device 5 (corresponding to the second signal wireless transmission unit 50) are provided.
  • the wireless transmission device 4 is provided with an antenna A1
  • the wireless transmission device 5 is provided with an antenna A2
  • the wireless device 3 is provided with an antenna A3.
  • the baseband processing device 2 generates IQ data (baseband signal) based on data received from a host device (not shown).
  • the CPRI standard is adopted for the data interface between the baseband processing device 2 and the wireless device 3. Accordingly, the baseband processing device 2 outputs IQ data of the CPRI standard (hereinafter also referred to as “CPRI signal”) to the wireless transmission device 4.
  • the wireless transmission device 4 modulates IQ data of the CPRI standard supplied from the baseband processing device 2 via an optical cable into a microwave and wirelessly transmits the microwave data via the antenna A1.
  • the wireless transmission device 5 wirelessly receives the microwave transmitted from the wireless transmission device 4 via the antenna A1 via the antenna A2.
  • the wireless transmission device 5 demodulates the wirelessly received microwave into IQ data (baseband signal). Then, the wireless transmission device 5 outputs this CPRI standard IQ data to the wireless device 3.
  • the wireless device 3 modulates the CPRI standard IQ data supplied from the wireless transmission device 5 via the optical cable into a high-frequency signal. This high frequency signal is wirelessly transmitted to the outside via the antenna A3 and received by the user terminal.
  • wireless transmission using a high-level modulation method is performed on the wireless transmission path L1 between the wireless transmission devices 4 and 5. .
  • This enables wireless transmission at a wireless transmission rate that is equal to or higher than the required IQ data transmission rate.
  • wireless transmission using a high multilevel modulation method becomes difficult.
  • the baseband processing device 2 compresses IQ data (baseband signal) at a compression rate corresponding to the communication quality of the wireless transmission path L1, and the wireless transmission device 4 responds to the communication quality of the wireless transmission path L1.
  • the IQ data is modulated into a microwave for wireless transmission using a modulation method.
  • the baseband processing device 2 switches the compression rate from the low magnification to the high magnification and compresses the IQ data.
  • the wireless transmission device 4 switches from the high multilevel to the low multilevel modulation method, and modulates the compressed IQ data into microwaves.
  • a modulation method capable of wireless transmission can be selected and the wireless transmission rate can be maintained higher than the required IQ data transmission rate. Wireless communication is possible.
  • the baseband processing device 2 switches the compression rate from high to low and compresses IQ data.
  • the wireless transmission device 4 switches from the low multi-value to the high multi-value modulation method, and modulates the compressed IQ data into microwaves. Thereby, high-quality wireless communication becomes possible.
  • the wireless device 3 demodulates a high frequency signal wirelessly received from the outside via the antenna A3 into IQ data (baseband signal). Then, the wireless device 3 outputs the CPRI standard IQ data to the wireless transmission device 5.
  • the wireless transmission device 5 modulates IQ data of the CPRI standard supplied from the wireless device 3 via the optical cable into a microwave and wirelessly transmits the microwave data via the antenna A2.
  • the wireless transmission device 4 wirelessly receives the microwave transmitted from the wireless transmission device 5 via the antenna A2 via the antenna A1. Then, the wireless transmission device 4 demodulates the wirelessly received microwave into IQ data (baseband signal). The wireless transmission device 4 then outputs this CPRI standard IQ data to the baseband processing device 2.
  • the baseband processing device 2 executes predetermined processing based on IQ data of the CPRI standard supplied from the wireless transmission device 4 via the optical cable. For example, the baseband processing device 2 outputs the processing result to a higher-level device (not shown).
  • the wireless device 3 compresses IQ data (baseband signal) at a compression rate according to the communication quality of the wireless transmission path L1 between the wireless transmission devices 4 and 5, and the wireless transmission device 5
  • the IQ data is modulated into microwaves using a modulation method corresponding to the communication quality of L1.
  • the wireless device 3 switches the compression rate from low to high and compresses IQ data. Further, the wireless transmission device 5 switches the high multi-value to the low multi-value modulation method, and modulates the compressed IQ data into microwaves. As a result, even when the communication quality of the wireless transmission path L1 deteriorates, a modulation scheme capable of wireless transmission can be selected and a wireless transmission rate higher than the required IQ data transmission rate can be maintained. Wireless communication is possible.
  • the wireless device 3 compresses the IQ data by switching from a high magnification to a low magnification.
  • the wireless transmission device 5 switches the low-multilevel to the high-multilevel modulation method, and modulates the compressed IQ data into microwaves. Thereby, high-quality wireless communication becomes possible.
  • a difference may be provided between the communication quality level (threshold) when switching the compression rate and the communication quality level (threshold) when switching the modulation method.
  • the modulation method is switched from the low multivalue to the high multivalue, and then the compression rate is switched from the high magnification to the low magnification.
  • the communication quality of the wireless transmission path L1 deteriorates, first, the compression rate is switched from low to high, and then the modulation method is switched from high to low.
  • FIG. 3 is a diagram showing the relationship between the compression rate and modulation method of IQ data and the wireless transmission rate.
  • FIG. 4 is a table corresponding to the diagram shown in FIG. Referring to FIGS. 3 and 4, the radio transmission rate increases as the modulation scheme becomes higher and lower as the modulation scheme becomes lower. In addition, the wireless transmission rate decreases as the compression rate decreases, and increases as the compression rate increases.
  • the modulation method is preferably as high as possible and the compression rate is preferably as low as possible.
  • the highest multi-level modulation method capable of communicating under the communication quality of the wireless transmission path L1 is adopted, and in this case, the compression ratio of the minimum magnification is set such that the wireless transmission rate is equal to or higher than the IQ data rate. Preferably it is selected.
  • a compression ratio of 1 is selected.
  • a compression ratio of 1.5 is selected.
  • a compression ratio of 2 is selected.
  • the QPSK modulation method is employed, a compression ratio of 3.5 times is selected.
  • the base station apparatus 1 switches the IQ data compression rate and the compressed IQ data modulation scheme according to the communication quality of the wireless transmission path L1, thereby enabling efficient wireless communication. Is possible.
  • the IQ data is compressed not in the wireless transmission apparatuses 4 and 5 but in the baseband processing apparatus 2 and the wireless apparatus 3, respectively. Accordingly, the CPRI signal propagating through the optical cable between the baseband processing device 2 and the radio transmission device 4 is compressed, and the CPRI signal propagating through the optical cable between the radio device 3 and the radio transmission device 5 is compressed.
  • the power consumed in each optical cable can be reduced by lowering the option of the standard.
  • IQ data is compressed in the baseband processing device 2, so that the plurality of wireless transmission devices 4.
  • the IQ data compression can be centrally managed and the number of devices for compressing IQ data can be reduced.
  • each IO data compression unit is configured to perform irreversible compression from the viewpoint of compression efficiency and ease of compression.
  • irreversible compression for example, Fast Fourier Transform (FFT) is adopted.
  • FFT Fast Fourier Transform
  • Lossy compression has an advantage that transmission delay due to compression processing is less than lossless compression.
  • each IO data compression unit may be configured to perform lossless compression as long as a certain compression efficiency is desired.
  • a lossless compression method predictive coding, run length, etc.
  • the structure which performs irreversible compression and the structure which performs lossless compression may be switched according to a modulation system. The same can be said for the third and fourth embodiments described below.
  • FIG. 5 is a block diagram illustrating a specific configuration example of the baseband processing device 2 and the wireless transmission device 4 provided on the baseband processing device 2 side.
  • FIG. 6 is a block diagram illustrating a specific configuration example of the wireless device 3 and the wireless transmission device 5 provided on the wireless device 3 side.
  • the baseband processing device 2 includes a baseband signal generation unit 200, an IQ data compression unit 201, a CPRI signal transmission unit 202, a CPRI signal reception unit 203, and an IQ data decoding unit 204.
  • the wireless transmission device 4 includes a CPRI signal reception unit 401, an OVH multiplexing unit 402, a wireless transmission unit 403, a wireless reception unit 404, a requested compression rate determination unit 405, an OVH extraction unit 406, and a CPRI signal transmission unit 407. And comprising.
  • the wireless transmission device 5 includes a wireless reception unit 501, a required compression rate determination unit 502, an OVH extraction unit 503, a CPRI signal transmission unit 504, a CPRI signal reception unit 505, an OVH multiplexing unit 506, and a wireless transmission unit 507. And comprising.
  • the wireless device 3 includes a CPRI signal reception unit 301, an IQ data decoding unit 302, a wireless transmission unit 303, a wireless reception unit 304, an IQ data compression unit 305, and a CPRI signal transmission unit 306.
  • the baseband signal generation unit 200 generates IQ data (baseband signal) D1 based on data received from a host device (not shown).
  • the IQ data compression unit 201 is a compression rate according to the communication quality of the wireless transmission path L1 (in this example, the compression rate of the compression rate information RQ1 received by the CPRI signal receiving unit 203 and requested from the wireless device 3 side) RQ1.
  • the IQ data D1 is compressed.
  • the IQ data compression unit 201 compresses the IQ data D1 by switching from a low magnification to a high magnification compression rate.
  • the IQ data compression unit 201 compresses the IQ data D1 by switching from a high magnification to a low magnification (details will be described later).
  • the CPRI signal transmission unit 202 transmits the compressed IQ data D1 and the compression rate information RQ1 after converting the data so as to satisfy the CPRI standard.
  • FIG. 7 is a diagram showing a frame format of a CPRI standard signal.
  • a CPRI standard signal is provided with a Vendor specific area where IQ data is not transmitted and received at regular intervals. Using this Vendor custom-specific area, IQ data compression rate information and compression requests are transmitted and received.
  • the CPRI signal receiving unit 401 receives the CPRI standard IQ data D1 (including the compression rate information RQ1) supplied from the CPRI signal transmitting unit 202 of the baseband processing device 2 via the optical cable.
  • the required compression rate determination unit 405 is configured on the wireless device 3 side.
  • the compression rate of the IQ data D2 before being modulated by the microwave MW2 is determined and output as new compression rate information RQ2.
  • the requested compression rate determination unit 405 compresses the IQ data D2 newly transmitted from the wireless device 3 side. Increase On the other hand, when the communication quality of the wireless transmission path L1 is improved and the CN noise ratio of the microwave MW2 is increased, the requested compression rate determination unit 405 compresses the IQ data D2 newly transmitted from the wireless device 3 side. Make it smaller.
  • OVH multiplexing section 402 multiplexes compressed IQ data D1 (including compression ratio information RQ1) and new compression ratio information RQ2 for IQ data D2.
  • the wireless transmission unit 403 modulates the data (baseband signal) multiplexed by the OVH multiplexing unit 402 into the microwave MW1 and wirelessly transmits it via the antenna A1.
  • FIG. 8 is a diagram showing a frame format of a radio signal transmitted and received between the radio transmission apparatuses 4 and 5.
  • the radio signal is provided with an overhead area (OVH area) before an area where IQ data is transmitted and received.
  • OVH area overhead area
  • compression rate information of IQ data and a compression request are transmitted and received.
  • the wireless transmission unit 403 uses the modulation method according to the communication quality of the wireless transmission path L1 (in other words, the compression rate RQ1 of the IQ data D1) to convert the data multiplexed by the OVH multiplexing unit 402 into the microwave. Modulate to MW1.
  • the wireless transmission unit 403 switches from a high multivalue to a low multivalue modulation method.
  • the compressed IQ data D1 is modulated into the microwave MW1.
  • the wireless transmission unit 403 switches from the low multi-value modulation method to the high multi-value modulation method.
  • the compressed IQ data D1 is modulated into the microwave MW1.
  • the wireless reception unit 501 wirelessly receives the microwave MW1 wirelessly transmitted from the wireless transmission device 4 via the antenna A1 via the antenna A2. Then, the wireless reception unit 501 demodulates the wirelessly received microwave MW1 into a baseband signal.
  • the OVH extraction unit 503 extracts the compressed IQ data D1 and its compression rate information RQ1 and the compression rate information RQ2 of the IQ data D2 from the baseband signal demodulated by the radio reception unit 501.
  • the CPRI signal transmission unit 504 converts the compressed IQ data D1 and its compression rate information RQ1 and the compression rate information RQ2 of the IQ data D2 so as to satisfy the CPRI standard and transmits the converted data.
  • the CPRI signal receiving unit 301 receives IQ data D1 (including compression rate information RQ1 and RQ2) of the CPRI standard supplied from the CPRI signal transmitting unit 504 of the wireless transmission device 5 via the optical cable.
  • the IQ data decoding unit 302 decodes the compressed IQ data D1 based on the compression rate information RQ1.
  • the wireless transmission unit 303 modulates the IQ data D1 decoded by the IQ data decoding unit 302 into a high frequency signal RF1.
  • the high-frequency signal RF1 is wirelessly transmitted to the outside via the antenna A3 and received by the user terminal.
  • the wireless reception unit 304 demodulates the high frequency signal RF1 wirelessly received from the outside via the antenna A3 into IQ data (baseband signal) D2.
  • the IQ data compression unit 305 is a compression rate according to the communication quality of the wireless transmission path L1 (in this example, the compression rate of the compression rate information RQ2 received by the CPRI signal reception unit 301 and requested from the baseband processing device 2 side) )
  • the IQ data D2 is compressed with RQ2.
  • the IQ data compression unit 305 switches the compression rate from the low magnification to the high magnification and compresses the IQ data D2.
  • the IQ data compression unit 305 switches the compression rate from high to low and compresses the IQ data D2.
  • the CPRI signal transmission unit 306 converts the compressed IQ data D2 and the compression rate information RQ2 so as to satisfy the CPRI standard and transmits the converted data.
  • the CPRI signal reception unit 505 receives the CPRI standard IQ data D2 (including the compression rate information RQ2) supplied from the CPRI signal transmission unit 306 of the wireless device 3 via the optical cable.
  • the required compression rate determination unit 502 is based on the CN noise ratio of the microwave MW1 wirelessly received by the wireless reception unit 501, which is one of the indexes representing the communication quality of the wireless transmission path L1. On the side, the compression rate of the IQ data D1 before being modulated to the microwave MW1 is determined and output as new compression rate information RQ1.
  • the required compression rate determination unit 502 performs processing for IQ data D1 newly transmitted from the baseband processing device 2 side. Increase the compression ratio.
  • the requested compression rate determination unit 502 performs the processing for the IQ data D1 newly transmitted from the baseband processing device 2 side. Reduce the compression rate.
  • the OVH multiplexing unit 506 multiplexes the compressed IQ data D2 (including the compression rate information RQ2) and the new compression rate information RQ1 for the IQ data D1.
  • the wireless transmission unit 507 modulates the data (baseband signal) multiplexed by the OVH multiplexing unit 506 into the microwave MW2 and wirelessly transmits it via the antenna A2.
  • the wireless transmission unit 507 uses the modulation scheme corresponding to the communication quality of the wireless transmission path L1 (in other words, the compression rate DQ2 of the IQ data D2) to microwave the data multiplexed by the OVH multiplexing unit 506. Modulate to MW2.
  • the wireless transmission unit 507 switches from a high-multilevel modulation scheme to a low-multilevel modulation scheme.
  • the compressed IQ data D2 is modulated into the microwave MW2.
  • the wireless transmission unit 507 switches from a low multi-value modulation method to a high multi-value modulation method.
  • the compressed IQ data D2 is modulated into the microwave MW2.
  • the wireless reception unit 404 wirelessly receives the microwave MW2 wirelessly transmitted from the wireless transmission device 5 via the antenna A2 via the antenna A1.
  • the wireless reception unit 404 demodulates the wirelessly received microwave MW1 into a baseband signal.
  • the OVH extraction unit 406 extracts the compressed IQ data D2 and its compression rate information RQ2 and the compression rate information RQ1 of the IQ data D1 from the baseband signal demodulated by the radio reception unit 404.
  • the CPRI signal transmission unit 407 converts the compressed IQ data D2 and its compression rate information RQ2 and the compression rate information RQ1 of the IQ data D1 after converting them so as to satisfy the CPRI standard.
  • the CPRI signal receiving unit 203 receives the CPRI standard IQ data D2 (including compression rate information RQ1 and RQ2) supplied from the CPRI signal transmitting unit 407 of the wireless transmission device 4 via the optical cable. .
  • the IQ data decoding unit 204 decodes the compressed IQ data D2 based on the compression rate information RQ2.
  • the baseband signal generation unit 200 performs a predetermined process based on the IQ data D2 decoded by the IQ data decoding unit 204. For example, the baseband processing device 2 outputs the processing result to a higher-level device (not shown).
  • the specific configuration of the base station apparatus 1 shown in FIGS. 5 and 6 is merely an example, and can be appropriately changed to another configuration having an equivalent function.
  • the CN noise ratio of the microwaves MW1 and MW2 is used as one of the indexes indicating the communication quality of the wireless transmission path L1 has been described as an example.
  • the present invention is not limited to this, and the microwave MW1 , MW2 field strength may be used. The same can be said for the third and fourth embodiments described below.
  • FIG. 9 is a block diagram illustrating a first modification of the base station device 1 as the base station device 1a.
  • the base station apparatus 1a includes a baseband processing apparatus (BBU) 2a, a radio apparatus (RRH) 3a, and radio transmission apparatuses 4a and 5a.
  • BBU baseband processing apparatus
  • RRH radio apparatus
  • the baseband processing device 2a, the wireless device 3a, and the wireless transmission devices 4a and 5a in the base station device 1a correspond to the baseband processing device 2, the wireless device 3, and the wireless transmission devices 4 and 5 in the base station device 1, respectively. To do.
  • CPRI signal CPRI standard signal
  • ETH signals trademark
  • FIG. 10 is a block diagram illustrating a specific configuration example of the baseband processing device 2a and the wireless transmission device 4a.
  • FIG. 11 is a block diagram illustrating a specific configuration example of the wireless device 3a and the wireless transmission device 5a.
  • the baseband processing device 2a replaces the CPRI signal transmission unit 202 and the CPRI signal reception unit 203 with an ETH signal transmission unit 205, a compression rate information packet generation unit 206, and an ETH signal.
  • a receiving unit 207 is provided.
  • the wireless transmission device 4a replaces the CPRI signal reception unit 401 and the CPRI signal transmission unit 407 with an ETH signal reception unit 408, an ETH signal transmission unit 409, and a compression rate information packet generation unit. 410.
  • the wireless transmission device 5a replaces the CPRI signal transmission unit 504 and the CPRI signal reception unit 505 with an ETH signal transmission unit 508, a compression rate information packet generation unit 509, and an ETH signal reception unit. 510.
  • the wireless device 3a replaces the CPRI signal receiving unit 301 and the CPRI signal transmitting unit 306 with an ETH signal receiving unit 307, a compression rate information packet extracting unit 308, an ETH signal transmitting unit 309, and A compression rate information packet generator 310 is provided.
  • the transmission path of the base station apparatus 1a will be described. Below, a different point from the base station apparatus 1 is mainly demonstrated.
  • the compression rate information packet generation unit 206 converts the compression rate information RQ1 of the IQ data D1 compressed by the IQ data compression unit 201 into an Ethernet standard packet.
  • the ETH signal transmission unit 205 converts the IQ data D1 compressed by the IQ data compression unit 201 into an Ethernet standard packet and transmits the packet at a constant interval, and in a section where the packet of the IQ data D1 is not transmitted, Information RQ1 and a compression request packet are transmitted.
  • FIG. 12 is a diagram illustrating a configuration example of a signal of the Ethernet standard adopted in the base station apparatus 1a.
  • packets of compressed IQ data are transmitted and received with a period T and a packet length L (L ⁇ T). Thereby, it is possible to transmit and receive IQ data which is continuous data.
  • the compression rate information and the compression request packet are transmitted and received in a section where the compressed IQ data packet is not transmitted and received.
  • the ETH signal reception unit 408 receives the packets of the Ethernet standard IQ data D1 and the compression rate information RQ1 transmitted from the ETH signal transmission unit 205 of the baseband processing device 2a.
  • the reception result of the ETH signal receiving unit 408 is supplied to the OVH multiplexing unit 402.
  • the compression rate information packet generation unit 509 converts the compression rate information RQ1 of the compressed IQ data D1 extracted by the OVH extraction unit 503 and the compression rate information RQ2 for the IQ data D2 into the Ethernet standard packet. Convert to The ETH signal transmission unit 508 converts the compressed IQ data D1 extracted by the OVH extraction unit 503 into an Ethernet standard packet and transmits it at a constant interval, and in a section where the IQ data D1 packet is not transmitted, The compression rate information RQ1, RQ2 and a compression request packet are transmitted.
  • the ETH signal receiving unit 307 receives the packet of the Ethernet standard IQ data D1 (including compression rate information RQ1 and RQ2) transmitted from the ETH signal transmitting unit 508 of the wireless transmission device 5a.
  • the IQ data D1 received by the ETH signal receiving unit 307 and the compression rate information RQ1 are supplied to the IQ data decoding unit 302 provided in the subsequent stage.
  • the compression rate information packet extraction unit 308 extracts the packet of the compression rate information RQ2 for the IQ data D2 from the data packets received by the ETH signal reception unit 307.
  • the compression rate information RQ2 extracted by the compression rate information packet extraction unit 308 is supplied to the IQ data compression unit 305 provided on the reception path.
  • the compression rate information packet generation unit 310 converts the compression rate information RQ2 of the IQ data D2 compressed by the IQ data compression unit 305 into an Ethernet standard packet.
  • the ETH signal transmission unit 309 converts the IQ data D2 compressed by the IQ data compression unit 305 into an Ethernet standard packet and transmits the packet at a constant interval, and in a section where the IQ data D2 packet is not transmitted, Information RQ2 and a compression request packet are transmitted.
  • the ETH signal reception unit 510 receives the packets of the Ethernet standard IQ data D2 and the compression rate information RQ2 transmitted from the ETH signal transmission unit 309. The reception result of the ETH signal receiving unit 510 is supplied to the OVH multiplexing unit 506.
  • the compression rate information packet generation unit 410 converts the compression rate information RQ2 of the compressed IQ data D2 extracted by the OVH extraction unit 406 and the compression rate information RQ1 for the IQ data D1 into an Ethernet standard packet. Convert to The ETH signal transmission unit 409 converts the compressed IQ data D2 extracted by the OVH extraction unit 406 into an Ethernet standard packet and transmits it at a constant interval, and in a section in which the IQ data D2 packet is not transmitted, The compression rate information RQ1, RQ2 and a compression request packet are transmitted.
  • the ETH signal receiving unit 207 receives a packet of Ethernet standard IQ data D2 (including compression rate information RQ1, RQ2) transmitted from the ETH signal transmitting unit 409 of the wireless transmission device 4a.
  • the IQ data D2 received by the ETH signal receiving unit 207 and its compression rate information RQ2 are supplied to the IQ data decoding unit 204 provided in the subsequent stage.
  • the compression rate information packet extraction unit 208 extracts the packet of the compression rate information RQ1 for the IQ data D1 from the data packets received by the ETH signal reception unit 207.
  • the compression rate information RQ1 extracted by the compression rate information packet extraction unit 208 is supplied to the IQ data compression unit 201 provided on the transmission path.
  • a base station device 1b as a second modification of the base station device 1 includes a baseband processing device 2b, a wireless device 3b, and wireless transmission devices 4b and 5b. Note that the baseband processing device 2b, the wireless device 3b, and the wireless transmission devices 4b and 5b in the base station device 1b correspond to the baseband processing device 2, the wireless device 3, and the wireless transmission devices 4 and 5 in the base station device 1, respectively. To do.
  • Ethernet is used for data transfer between the baseband processing device 2b and the radio transmission device 4b and data transfer between the radio transmission device 5b and the radio device 3b.
  • Standard signals are used.
  • FIG. 13 is a block diagram illustrating a specific configuration example of the baseband processing device 2b and the wireless transmission device 4b.
  • FIG. 14 is a block diagram illustrating a specific configuration example of the wireless device 3b and the wireless transmission device 5b.
  • the baseband processing device 2b includes a compression rate information extraction unit 209 instead of including the compression rate information packet generation unit 206 and the compression rate information packet extraction unit 208.
  • the wireless transmission device 4b does not include the compression rate information packet generation unit 410 as compared with the wireless transmission device 4a.
  • the wireless transmission device 5b does not include the compression rate information packet generation unit 509 as compared with the wireless transmission device 5b.
  • the wireless device 3b includes a compression rate information extraction unit 311 instead of including the compression rate information packet extraction unit 308 and the compression rate information packet generation unit 310.
  • the ETH signal transmission unit 205 converts the IQ data D1 compressed by the IQ data compression unit 201 and the compression rate information RQ1 into a single packet of the Ethernet standard and transmits it at regular intervals.
  • FIG. 15 is a diagram illustrating a configuration example of a signal of the Ethernet standard adopted in the base station apparatus 1b.
  • the compression rate information and the compression request stored in the OVH area are transmitted and received as a single packet at regular intervals.
  • the ETH signal reception unit 408 receives the packet of the Ethernet standard IQ data D1 and the compression rate information RQ1 transmitted from the ETH signal transmission unit 205 of the wireless transmission device 4b.
  • the reception result of the ETH signal receiving unit 408 is supplied to the OVH multiplexing unit 402.
  • the ETH signal transmission unit 508 converts the compressed IQ data D1 extracted by the OVH extraction unit 503, the compression rate information RQ1, and the compression rate information RQ2 for the IQ data D2 into a single unit of the Ethernet standard. Are converted into packets and sent at regular intervals.
  • the ETH signal receiving unit 307 receives the packet of the Ethernet standard IQ data D1 (including compression rate information RQ1 and RQ2) transmitted from the ETH signal transmitting unit 508 of the wireless transmission device 5b.
  • the IQ data D1 received by the ETH signal receiving unit 307 and the compression rate information RQ1 are supplied to the IQ data decoding unit 302 provided in the subsequent stage.
  • the compression rate information extraction unit 311 extracts the compression rate information RQ2 for the IQ data D2 from the OVH region of the data packet received by the ETH signal reception unit 307.
  • the compression rate information RQ2 extracted by the compression rate information extraction unit 311 is supplied to the IQ data compression unit 305 provided on the reception path.
  • the ETH signal transmission unit 309 converts the IQ data D2 compressed by the IQ data compression unit 305 and its compression rate information RQ2 into a single packet of the Ethernet standard and transmits the packet at regular intervals.
  • the ETH signal reception unit 510 receives the Ethernet standard IQ data D2 and the compression rate information RQ2 packet transmitted from the ETH signal transmission unit 309 of the wireless device 3b.
  • the reception result of the ETH signal receiving unit 510 is supplied to the OVH multiplexing unit 506.
  • the ETH signal transmission unit 409 converts the compressed IQ data D2 extracted by the OVH extraction unit 406, the compression rate information RQ2, and the compression rate information RQ1 for the IQ data D1 into a single unit of the Ethernet standard. Are converted into packets and sent at regular intervals.
  • the ETH signal receiving unit 207 receives a packet of Ethernet standard IQ data D2 (including compression rate information RQ1 and RQ2) transmitted from the ETH signal transmitting unit 409 of the wireless transmission device 4b.
  • the IQ data D2 received by the ETH signal receiving unit 207 and its compression rate information RQ2 are supplied to the IQ data decoding unit 204 provided in the subsequent stage.
  • the compression rate information extraction unit 209 extracts the compression rate information RQ1 for the IQ data D1 from the OVH area of the data packet received by the ETH signal reception unit 207.
  • the compression rate information RQ1 extracted by the compression rate information extraction unit 209 is supplied to the IQ data compression unit 201 provided on the transmission path.
  • FIG. 16 is a block diagram of the base station device 1c according to the third embodiment.
  • the base station device 1 c includes two sets of wireless transmission devices between the baseband processing device 2 and the wireless device 3 as compared with the base station device 1. This will be specifically described below.
  • the base station device 1c wirelessly transfers data between the baseband processing device (BBU) 2, the wireless device (RRH) 3, and the baseband processing device 2 and the wireless device 3.
  • Wireless transmission devices 41c and 42c and wireless transmission devices 51c and 52c for performing are provided.
  • the wireless transmission devices 41c and 42c are provided with antennas A11 and A12
  • the wireless transmission devices 51c and 52c are provided with antennas A21 and A22, respectively
  • the wireless device 3 is provided with an antenna A3. That is, the base station apparatus 1c has a so-called RTA (Radio Traffic Aggregation) configuration.
  • RTA Radio Traffic Aggregation
  • a combination of the wireless transmission devices 41 c and 42 c corresponds to the wireless transmission device 4, and a combination of the wireless transmission devices 51 c and 52 c corresponds to the wireless transmission device 5.
  • the combination of antennas A11 and A12 corresponds to antenna A1
  • the combination of antennas A21 and A22 corresponds to antenna A2.
  • FIG. 17 is a block diagram illustrating a first specific configuration example of the wireless transmission devices 41c and 42c provided on the baseband processing device 2 side.
  • the wireless transmission device 41c includes a CPRI signal reception unit 411, a CPRI signal distribution unit 412, an OVH multiplexing unit 414, a wireless transmission unit 415, a wireless reception unit 416, a requested compression rate determination unit 417, and an OVH extraction unit. 418, a CPRI signal assembly unit 420 and a CPRI signal transmission unit 421 are provided.
  • the wireless transmission device 42 c includes a CPRI signal reception unit 422, an OVH multiplexing unit 424, a wireless transmission unit 425, a wireless reception unit 426, a requested compression rate determination unit 427, an OVH extraction unit 428, and a CPRI signal transmission unit 430.
  • the CPRI signal reception unit 411, the OVH multiplexing unit 414, the wireless transmission unit 415, the wireless reception unit 416, the requested compression rate determination unit 417, the OVH extraction unit 418, and the CPRI signal transmission unit 421 are respectively a CPRI signal reception unit 401, This corresponds to the OVH multiplexing unit 402, the wireless transmission unit 403, the wireless reception unit 404, the requested compression rate determination unit 405, the OVH extraction unit 406, and the CPRI signal transmission unit 407.
  • the CPRI signal receiving unit 422, the OVH multiplexing unit 424, the wireless transmission unit 425, the wireless reception unit 426, the request compression rate determination unit 427, the OVH extraction unit 428, and the CPRI signal transmission unit 430 are respectively connected to the CPRI signal reception unit 401, This corresponds to the OVH multiplexing unit 402, the wireless transmission unit 403, the wireless reception unit 404, the requested compression rate determination unit 405, the OVH extraction unit 406, and the CPRI signal transmission unit 407.
  • the wireless transmission device 41 c further includes a CPRI signal distribution unit 412 and a CPRI signal assembly unit 420 as compared with the wireless transmission device 4.
  • Other configurations of the wireless transmission device 41 c are the same as those of the wireless transmission device 4.
  • the wireless transmission device 42 c has the same configuration as the wireless transmission device 4.
  • the CPRI signal distribution unit 412 is provided on a transmission path between the CPRI signal reception unit 411 and the OVH multiplexing unit 414, and two CPRI signals from the baseband processing device 2 received by the CPRI signal reception unit 411 are provided. Divide (sort). Therefore, one of the signals distributed by the CPRI signal distribution unit 412 is wirelessly transmitted via the wireless transmission path L11 between the wireless transmission devices 41c and 51c, and the other of the signals distributed by the CPRI signal distribution unit 412 is The wireless transmission is performed via the wireless transmission path L12 between the wireless transmission devices 42c and 52c.
  • the CPRI signal assembling unit 420 is provided on the reception path between the OVH extraction unit 418 and the CPRI signal transmission unit 421, and combines the extraction results of the OVH extraction units 418 and 428 and outputs the result to the CPRI signal transmission unit 421. To do.
  • the OVH extraction unit 418 includes the compressed IQ data D21 (data wirelessly received via the wireless transmission path L11) and its compression rate information RQ21, and the IQ data D11 (through the wireless transmission path L11). And compression rate information RQ11 for the data scheduled to be wirelessly transmitted).
  • the OVH extraction unit 428 includes the compressed IQ data D22 (data wirelessly received via the wireless transmission line L12) and its compression rate information RQ22, and the IQ data D12 (wirelessly received via the wireless transmission line L12). Compression rate information RQ12 for (data).
  • the CPRI signal assembling unit 420 combines the extraction results of the OVH extraction units 418 and 428 and outputs the compressed IQ data D2, its compression rate information RQ2, and the compression rate information RQ1 for the IQ data D1.
  • the configurations and operations of the wireless transmission devices 51c and 52c are the same as those of the wireless transmission device 5 except that a CPRI signal distribution unit is provided on the transmission path and a CPRI signal assembly unit is provided on the reception path. Therefore, the description thereof is omitted.
  • the base station device 1c divides IQ data into two signal components and performs wireless transmission via the two wireless transmission paths L11 and L12 formed between the two sets of wireless transmission devices.
  • wireless transmission of IQ data at a more reliable transmission rate can be realized.
  • the case where the CPRI standard is adopted as the data interface between the baseband processing device 2 and the wireless device 3 has been described as an example.
  • the present invention is not limited to this, and the Ethernet standard may be adopted, for example.
  • the configuration when the Ethernet standard is adopted may be referred to the configurations of FIGS. 9 to 12, and the description thereof is omitted.
  • FIG. 18 is a block diagram illustrating a second specific configuration example of the wireless transmission devices 41c and 42c as the wireless transmission devices 41d and 42d.
  • the baseband processing device 2d, the wireless device 3d, and the wireless transmission devices 51d and 52d constitute a base station device 1d corresponding to the base station device 1c.
  • the baseband processing device 2d does not have the IQ data compression unit 201 and the IQ data decoding unit 204 as compared with the baseband processing device 2, but the wireless transmission device 41d compares with the wireless transmission device 41c.
  • the CPRI signal compression unit 413 and the CPRI signal restoration unit 419 are further provided, and the wireless transmission device 42d further includes the CPRI signal compression unit 423 and the CPRI signal restoration unit 429 as compared with the wireless transmission device 42c.
  • the CPRI signal compression unit 413 is provided on the transmission path between the CPRI signal reception unit 411 and the OVH multiplexing unit 414. Then, the CPRI signal compressing unit 413 extracts one of the CPRI signals distributed by the CPRI signal receiving unit 411 by the compression rate according to the communication quality of the wireless transmission path L11 (in this example, the OVH extracting unit 418 extracts the wireless (Compression rate of compression rate information RQ11 requested from the apparatus 3 side) RQ11 is used for compression.
  • the CPRI signal compression unit 423 is provided on the transmission path between the CPRI signal reception unit 422 and the OVH multiplexing unit 424. Then, the CPRI signal compression unit 423 extracts the other of the CPRI signals distributed by the CPRI signal reception unit 411 by the compression rate (in this example, the OVH extraction unit 428) according to the communication quality of the wireless transmission line L12, Compression is performed with the compression ratio RQ12 (compression ratio of the compression ratio information RQ12 requested from the apparatus 3 side).
  • the IQ data modulation method and compression rate can be set independently of each other.
  • the CPRI signal distribution unit 412 distributes the CPRI signal component having a high priority to the radio transmission path side adopting the high-multilevel modulation method, and the CPRI signal component having a low priority is low
  • the value is distributed to the wireless transmission line that uses the value modulation method. This enables high-quality wireless transmission of a CPRI signal component with a high priority, and more reliable wireless transmission with a poor quality of a CPRI signal component with a low priority.
  • the CPRI signal restoration unit 419 is provided on the reception path between the OVH extraction unit 418 and the CPRI signal assembly unit 420, and the compressed IQ data D21 extracted by the OVH extraction unit 418 is used. Similarly, restoration is performed based on the compression rate information RQ21 extracted by the OVH extraction unit 418.
  • the CPRI signal restoration unit 429 is provided on the reception path between the OVH extraction unit 428 and the CPRI signal transmission unit 430, and the compressed IQ data D22 extracted by the OVH extraction unit 428 is Similarly, restoration is performed based on the compression rate information RQ22 extracted by the OVH extraction unit 428.
  • the CPRI signal assembling unit 420 combines the IQ data D21 restored by the CPRI signal restoring unit 419 and the IQ data D22 restored by the CPRI signal restoring unit 429, and outputs the synthesized IQ data D2.
  • the CPRI signal assembling unit 420 also synthesizes the compression rate information RQ11 and RQ12 for the IQ data D11 and D12.
  • the wireless transmission devices 41d and 42d are the same as those of the wireless transmission devices 41c and 42c, description thereof is omitted.
  • the configurations and operations of the wireless transmission devices 51d and 52d are the same as the wireless transmission devices 51c, 51c except that a CPRI signal compression unit is provided on the transmission path and a CPRI signal decoding unit is provided on the reception path. Since it is the same as 52c, its description is omitted. Accordingly, the wireless device 3d does not include the IQ data compression unit 305 and the IQ data decoding unit 302.
  • the base station apparatus 1d can achieve the same effects as the base station apparatus 1c, and can divide IQ data into two signal components and perform wireless transmission with different modulation schemes and compression rates, respectively. Can do. Thereby, for example, high-quality wireless transmission of a high-priority CPRI signal component can be performed, and more reliable wireless transmission can be performed although the quality of a low-priority CPRI signal component is inferior.
  • FIG. 19 is a block diagram illustrating a third specific configuration example of the wireless transmission devices 41c and 42c as the wireless transmission devices 41e and 42e.
  • the baseband processing device 2d, the wireless device 3d, and the wireless transmission devices 51e and 52e constitute a base station device 1e corresponding to the base station device 1c.
  • the baseband processing device 2e does not have the IQ data compression unit 201 and the IQ data decoding unit 204 as compared with the baseband processing device 2, but the wireless transmission device 41e compares with the wireless transmission device 41c.
  • the CPRI signal compression unit 413 and the CPRI signal restoration unit 419 are further provided.
  • the context of the OVH multiplexing unit 414 and the CPRI signal receiving unit 411 is reversed, and the context of the CPRI signal assembling unit 420 and the OVH extraction unit 418 is reversed.
  • the wireless transmission device 42e does not include the OVH multiplexing unit 424 and the OVH extraction unit 428 as compared with the wireless transmission device 42c.
  • the CPRI signal compression unit 413 provided only in the wireless transmission device 41e compresses the CPRI signal before the distribution, and the CPRI signal restoration unit 419 provided only in the wireless transmission device 41e performs synthesis ( The CPRI signal after assembly is restored.
  • the CPRI signal distribution unit is provided on the transmission path of the wireless transmission device 51e
  • the CPRI signal assembly unit is provided on the reception path of the wireless transmission device 51e. Basically, both are the same as those of the wireless transmission device 5, and the description thereof is omitted.
  • the base station device 1e can achieve the same effects as the base station device 1c.
  • FIG. 20 is a block diagram of a base station device (wireless communication device) 1f according to the fourth embodiment.
  • the base station device 1f includes a baseband processing device 2f, a wireless device 3f, wireless transmission devices 41f and 42f, and wireless transmission devices 51f and 52f.
  • the wireless transmission devices 41f and 42f are provided with antennas A11 and A12
  • the wireless transmission devices 51f and 52f are provided with antennas A21 and A22, respectively
  • the wireless device 3f is provided with an antenna A3.
  • the base station device 1f has a so-called LAG (Link Aggregation) configuration.
  • FIG. 21 is a block diagram illustrating a specific configuration example of the baseband processing device 2f and the wireless transmission devices 41f and 42f.
  • FIG. 22 is a block diagram illustrating a specific configuration example of the wireless device 3f and the wireless transmission devices 51f and 52f.
  • the baseband processing device 2f includes a baseband signal generation unit 200f, IQ data compression units 2011 and 2012, CPRI signal transmission units 2021 and 2022, CPRI signal reception units 2031 and 2032, IQ data decoding units 2041 and 2042, and , Compression rate information etc. extraction units 2101 and 2102.
  • the baseband processing device 2 f has a double configuration of the baseband processing device 2 other than the baseband signal generation unit 200.
  • the baseband signal generation unit 200f includes a QoS control unit 211, a distribution OVH multiplexing unit 231, 234, an IQ data generation unit 213, 223, and a network (NW) data generation unit 220, 230.
  • the wireless transmission device 41f includes a CPRI signal reception unit 4011, an OVH multiplexing unit 4021, a wireless transmission unit 4031, a wireless reception unit 4041, a required compression rate determination unit 4051, an OVH extraction unit 4061, and a CPRI signal transmission unit 4071.
  • the wireless transmission device 42f includes a CPRI signal reception unit 4012, an OVH multiplexing unit 4022, a wireless transmission unit 4032, a wireless reception unit 4042, a required compression rate determination unit 4052, an OVH extraction unit 4062, and a CPRI signal transmission unit 4072.
  • the wireless transmission devices 41 f and 42 f both have the same configuration and operation as the wireless transmission device 4.
  • the wireless device 3f includes a CPRI signal reception unit 3011 and 3012, an IQ data decoding unit 3021 and 3022, a wireless transmission unit 303, a wireless reception unit 304, an IQ data compression unit 3051 and 3052, and a CPRI signal transmission unit 3061. 3062, a distribution OVH extraction unit 312, and an IQ data distribution unit 313.
  • the wireless device 3 f has a double configuration of the wireless device 3.
  • the wireless transmission unit 303 and the wireless reception unit 304 are both shared by a double configuration.
  • the wireless transmission device 51f includes a wireless reception unit 5011, a required compression rate determination unit 5021, an OVH extraction unit 5031, a CPRI signal transmission unit 5041, a CPRI signal reception unit 5051, an OVH multiplexing unit 5061, and a wireless transmission unit 5071.
  • the wireless transmission device 52f includes a wireless reception unit 5012, a required compression rate determination unit 5022, an OVH extraction unit 5032, a CPRI signal transmission unit 5042, a CPRI signal reception unit 5052, an OVH multiplexing unit 5062, and a wireless transmission unit 5072.
  • the wireless transmission devices 51 f and 52 f both have the same configuration and operation as the wireless transmission device 5.
  • the operation of the transmission path of the base station device 1f will be described. Since the base station apparatus 1f includes many configurations similar to those already described as described above, the description will be simplified.
  • the QoS control unit 211 is provided to face the compression rate information S11, S12, S21, S22 of the IQ data compression units 2011, 2012, 3051, and 3052 and the base station device 1f. Based on the compression rate information (information included in S21 and S22) acquired from another base station device (hereinafter referred to as an opposite base station device) (not shown), the network data supplied from the host device is distributed.
  • an opposite base station device another base station device
  • the QoS control unit 211 distributes network data having a high priority to transmission / reception paths in which a low compression rate is adopted (in other words, transmission / reception paths in which a high-multilevel modulation method is adopted), and a high compression ratio is obtained.
  • Network data having a low priority is allocated to a transmission / reception path to be employed (in other words, a transmission / reception path to which a low-value modulation scheme is employed).
  • the distribution OVH multiplexing units 231 and 234 multiplex the network data distributed by the QoS control unit 211 and information related to the data, respectively.
  • Information about data is stored in the OVH area of the data frame.
  • the QoS control information required for the opposite base station apparatus is also stored in the OVH area.
  • the IQ data generation unit 213 converts the network data output from the distribution OVH multiplexing unit 231 into IQ data D11 and outputs the IQ data D11.
  • the IQ data D11 is compressed, and then supplied to the wireless transmission device 41f through the same operation as the baseband processing device 2.
  • the wireless transmission device 41f modulates the compressed IQ data D11 into the microwave MW11, and then wirelessly transmits it through the antenna A11.
  • the wireless transmission device 51f demodulates the microwave MW11 wirelessly received via the antenna A12 into compressed IQ data D11 and outputs the compressed IQ data D11 to the wireless device 3f.
  • the IQ data generation unit 223 converts the network data output from the distribution OVH multiplexing unit 234 into IQ data D12 and outputs the IQ data D12.
  • the IQ data D12 is compressed and then supplied to the wireless transmission device 42f through the same operation as that of the baseband processing device 2.
  • the wireless transmission device 42f modulates the compressed IQ data D12 into the microwave MW12, and then wirelessly transmits the modulated data via the antenna A12.
  • the wireless transmission device 52f demodulates the microwave MW12 received wirelessly via the antenna A22 into compressed IQ data D12 and outputs the compressed IQ data D12 to the wireless device 3f.
  • the wireless device 3f decodes the compressed IQ data D11 and D12, combines them, and reproduces the IQ data D1.
  • the reproduced IQ data D1 is wirelessly transmitted via the antenna A3.
  • the OVH area of the radio signal wirelessly transmitted via the antenna A3 includes QoS control information for the opposite base station apparatus by the QoS control unit 211.
  • the received IQ data D1 is distributed based on the QoS control information.
  • the sorting OVH extraction unit 312 extracts, for example, QoS control information for the own station by the QoS control unit 211 from the OVH region of the wireless signal wirelessly received via the antenna A3.
  • the IQ data distribution unit 313 distributes the IQ data D2 wirelessly received via the antenna A3 based on the QoS control information for the own station.
  • the distributed IQ data D21 and D22 are respectively compressed and then supplied to the baseband processing device 2f via the wireless transmission devices 51f and 52f and the wireless transmission devices 41f and 42f.
  • the compressed IQ data D21 and D22 are respectively decoded and converted into network data by the NW data generation units 220 and 230. This network data is output to a host device (not shown).
  • the base station device 1f divides the IQ data into two signal components and performs wireless transmission via the two wireless transmission paths L11 and L12 formed between the two sets of wireless transmission devices.
  • wireless transmission of IQ data at a higher transmission rate can be realized.
  • the base station apparatus 1f performs QoS control in the baseband processing apparatus, thereby performing high-quality wireless transmission of high-priority IQ data, and lower-priority IQ data quality is lower but more reliable. Wireless transmission can be performed.
  • the baseband processing device 2f is provided with two IQ data compression units and the wireless device 3f is provided with two IQ data compression units has been described as an example.
  • the baseband processing device 2f may be provided with a common IQ data compression unit, and the wireless device 3f may be provided with a common IQ data compression unit.
  • FIG. 23 is a block diagram illustrating a specific configuration example of a baseband processing device 2g and wireless transmission devices 41g and 42g provided in a base station device 1g which is a modification of the base station device 1f.
  • FIG. 24 is a block diagram illustrating a specific configuration example of the wireless device 3g and the wireless transmission devices 51g and 52g provided in the base station device 1g which is a modification of the base station device 1f.
  • a CPRI standard signal (CPRI signal) is used to exchange data between the baseband processing device 2g and the wireless transmission devices 41g and 42g and to exchange data between the wireless transmission devices 51g and 52g and the wireless device 3g.
  • Ethernet standard signals (hereinafter also referred to as ETH signals) are used.
  • the baseband processing device 2g includes an ETH signal transmission unit 2051 and a compression rate information packet generation unit 2061 instead of the CPRI signal transmission unit 2021, and includes a CPRI signal reception unit 2031 and Instead of the compression rate information extraction unit 2101, an ETH signal reception unit 2071 and a compression rate information packet extraction unit 2081 are provided. Further, an ETH signal transmission unit 2052 and a compression rate information packet generation unit 2062 are provided instead of the CPRI signal transmission unit 2022, and an ETH signal reception unit 2072 is provided instead of the CPRI signal reception unit 2032 and the compression rate information extraction unit 2102. And a packet extraction unit 2082 such as compression rate information.
  • the wireless transmission device 41g Compared with the wireless transmission device 41f, the wireless transmission device 41g has an ETH signal reception unit 4081 instead of the CPRI signal 4011, and an ETH signal transmission unit 4091 instead of the CPRI signal transmission unit 4071, compression rate information, and the like.
  • a packet generation unit 4101 is included.
  • the wireless transmission device 42g Compared with the wireless transmission device 42f, the wireless transmission device 42g has an ETH signal reception unit 4082 instead of the CPRI signal 4012, and an ETH signal transmission unit 4092 instead of the CPRI signal transmission unit 4072, compression rate information, and the like.
  • a packet generation unit 4102 is included.
  • the wireless transmission device 51g includes an ETH signal reception unit 5101 instead of the CPRI signal reception unit 5051, and replaces the CPRI signal transmission unit 5041 with an ETH signal transmission unit 5081 and a compression rate.
  • An information packet generation unit 5091 is included.
  • the wireless transmission device 52g includes an ETH signal reception unit 5102 instead of the CPRI signal reception unit 5052, and replaces the CPRI signal transmission unit 5042 with an ETH signal transmission unit 5082 and a compression rate.
  • An information packet generation unit 5092 is included.
  • the wireless device 3g includes an ETH signal transmitting unit 3091 and a compression rate information packet generating unit 3101 instead of the CPRI signal transmitting unit 3061, and an ETH signal instead of the CPRI signal receiving unit 3011.
  • a receiving unit 3071 and a compression rate information packet extracting unit 3081 are included.
  • an ETH signal transmission unit 3092 and a compression rate information packet generation unit 3102 are provided instead of the CPRI signal transmission unit 3062, and an ETH signal reception unit 3072 and a compression rate information packet extraction unit 3082 are provided instead of the CPRI signal reception unit 3012.
  • the base station device 1g can achieve the same effects as the base station device 1f.
  • the case where the CPRI standard or the Ethernet standard is adopted as the data interface between the baseband processing device and the wireless device has been described as an example.
  • the present invention is not limited to this, and other high-speed data interface standards or A local interface standard may be employed.
  • FIG. 10 is a block diagram showing a configuration example of the base station apparatus 10 according to the first embodiment.
  • the structural example of the base station apparatus 10 which concerns on Embodiment 1 is demonstrated, the same thing can be said also about the base station apparatus which concerns on other embodiment.
  • the base station device 10 includes an RF transceiver 1001, a network interface 1003, a processor 1004, and a memory 1005.
  • the RF transceiver 1001 performs analog RF signal processing to communicate with user terminals (UEs).
  • the RF transceiver 1001 may include multiple transceivers.
  • RF transceiver 1001 is coupled to antenna 1002 and processor 1004.
  • the RF transceiver 1001 receives modulation symbol data (or OFDM symbol data) from the processor 1004, generates a transmission RF signal, and supplies the transmission RF signal to the antenna 1002. Further, the RF transceiver 1001 generates a baseband received signal based on the received RF signal received by the antenna 1002, and supplies this to the processor 1004.
  • the network interface 1003 is used to communicate with network nodes (e.g., other eNBs, Mobility Management Entity (MME), Serving Gateway (S-GW), and TSS or ITS server).
  • the network interface 1003 may include, for example, a network interface card (NIC) compliant with IEEE 802.3 series.
  • the processor 1004 performs data plane processing including digital baseband signal processing for wireless communication and control plane processing.
  • the digital baseband signal processing by the processor 1004 may include signal processing of a PDCP layer, an RLC layer, a MAC layer, and a PHY layer.
  • the signal processing by the processor 1004 may include signal processing of the GTP-U / UDP / IP layer at the X2-U interface and the S1-U interface.
  • the control plane processing by the processor 1004 may include processing of the X2AP protocol, the S1-MME protocol, and the RRC protocol.
  • the processor 1004 may include a plurality of processors.
  • the processor 1004 includes a modem processor (eg, DSP) that performs digital baseband signal processing, a processor (eg, processor) that performs signal processing of the GTP-U • UDP / IP layer in the X2-U interface and the S1-U interface. DSP) and a protocol stack processor (eg, CPU or MPU) that performs control plane processing may be included.
  • DSP modem processor
  • processor eg, processor
  • a protocol stack processor eg, CPU or MPU
  • the memory 1005 is configured by a combination of a volatile memory and a nonvolatile memory.
  • the memory 1005 may include a plurality of physically independent memory devices.
  • the volatile memory is, for example, Static Random Access Memory (SRAM), Dynamic RAM (DRAM), or a combination thereof.
  • the non-volatile memory is a mask Read Only Memory (MROM), Electrically Erasable Programmable ROM (EEPROM), flash memory, hard disk drive, or any combination thereof.
  • Memory 1005 may include storage located remotely from processor 1004. In this case, the processor 1004 may access the memory 1005 via the network interface 1003 or an I / O interface not shown.
  • the memory 1005 may store a software module (computer program) including an instruction group and data for performing processing by the base station apparatus 10.
  • the processor 1004 may be configured to perform processing of the base station apparatus 10 by reading the software module from the memory 1005 and executing the software module.
  • the processor included in the base station apparatus 10 executes one or a plurality of programs including a group of instructions for causing a computer to execute the algorithm described with reference to the drawings.
  • the program can be stored and supplied to a computer using various types of non-transitory computer readable media.
  • Non-transitory computer readable media include various types of tangible storage media (tangible storage medium).
  • non-transitory computer-readable media are magnetic recording media (eg flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (eg magneto-optical discs), Compact Disc Read Only Memory (CD-ROM), CD-ROM R, CD-R / W, semiconductor memory (for example, mask ROM, Programmable ROM (PROM), Erasable PROM (EPROM), flash ROM, Random Access Memory (RAM)).
  • the program may also be supplied to the computer by various types of temporary computer-readable media. Examples of transitory computer readable media include electrical signals, optical signals, and electromagnetic waves.
  • the temporary computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.
  • Base station device 1, 1a to 1g Base station device 2, 2a to 2g Baseband processing device 3, 3a to 3g Wireless device 4, 4a, 4b Wireless transmission device 5, 5a, 5b Wireless transmission device 10 Base station device 20 Baseband processing unit 30 Radio unit 40 First signal radio transmission unit 50 Second signal radio transmission unit 41c-41g, 42c-42g Radio transmission device 51c-51g, 52c-52g Radio transmission device 200, 200f Baseband signal generation unit 201 IQ data compression Unit 202 CPRI signal transmission unit 203 CPRI signal reception unit 204 IQ data decoding unit 205 ETH signal transmission unit 206 compression rate information packet generation unit 207 ETH signal reception unit 208 compression rate information packet extraction unit 209 compression rate information extraction unit 211 QoS control unit 213, 223 IQ data generator 220, 230 NW data Data generator 231, 234 Sorting OVH multiplexer 301 CPRI signal receiver 302 IQ data decoder 303 Radio transmitter 304 Radio receiver 305 IQ data compressor 306 CPRI signal transmitter 307 ETH signal receiver 308 Com

Abstract

A wireless communication apparatus according to one embodiment of the present invention is provided with: a baseband processing device (2) that generates IQ data; a wireless transmission device (4) that modulates the IQ data into microwaves and wirelessly transmits the microwaves; a wireless transmission device (5) that demodulates, into IO data, the microwaves received wirelessly via a wireless transmission path (L1) to the wireless transmission device (4); and a wireless device (3) that modulates, into a high-frequency signal, the IO data demodulated by the wireless transmission device (5), and transmits said high-frequency signal outwards, wherein the baseband processing device (2) compresses the IQ data by a data compression ratio depending on the communication quality in the wireless transmission path (L1), and the wireless transmission device (4) modulates the IQ data into microwaves by using an appropriate modulation format in accordance with the communication quality in the wireless transmission path (L1).

Description

無線通信装置、無線通信システム及び無線通信方法Wireless communication apparatus, wireless communication system, and wireless communication method
　本発明は、無線通信装置、無線通信システム及び無線通信方法に関し、例えば効率的な無線通信に適した無線通信装置、無線通信システム及び無線通信方法に関する。 The present invention relates to a wireless communication device, a wireless communication system, and a wireless communication method, for example, a wireless communication device, a wireless communication system, and a wireless communication method suitable for efficient wireless communication.
　基地局装置を構成するベースバンド処理装置（ＢＢＵ(Base Band Unit））及び無線装置（ＲＲＨ(Remote Radio Head)）間のインターフェースに関する技術が特許文献１に開示されている。特許文献１に開示された構成は、ベースバンド処理装置及び無線装置間のＩＱデータの伝送をＣＰＲＩ転送路（有線）を介して行っている。しかしながら、特許文献１の構成では、光ケーブル等の有線を配設するためのコストが増大してしまうという問題があった。 Patent Document 1 discloses a technique related to an interface between a baseband processing device (BBU (Base Band Unit)) and a radio device (RRH (Remote Radio を Head)) constituting a base station device. The configuration disclosed in Patent Document 1 transmits IQ data between a baseband processing device and a wireless device via a CPRI transfer path (wired). However, the configuration of Patent Document 1 has a problem that the cost for arranging a cable such as an optical cable increases.
　そこで、近年では、基地局装置を構成するベースバンド処理装置（ＢＢＵ(Base Band Unit））及び無線装置（ＲＲＨ(Remote Radio Head)）間のＩＱデータの伝送方式として、例えば特許文献２に示されるように、無線伝送方式が用いられている。 Therefore, in recent years, for example, Patent Document 2 discloses a transmission method of IQ data between a baseband processing device (BBU (Base Band Unit)) and a wireless device (RRH (Remote Radio Head)) constituting a base station device. As described above, a wireless transmission method is used.
国際公開第２０１４／１３６１９３号International Publication No. 2014/136193 特開２０１４－２３００９８号公報JP 2014-230098 A
　無線通信システムでは、高速なＩＱデータの伝送レートが求められるため、通常、ベースバンド処理装置及び無線装置間の無線伝送路では、高多値の変調方式を用いた無線伝送が行われる。それにより、要求されるＩＱデータの伝送レート以上の無線伝送レートでの無線伝送が可能となる。しかしながら、雨天等の外部要因によって無線伝送路の通信品質が劣化すると、高多値の変調方式を用いた無線伝送が困難になってしまうという問題があった。その他の課題と新規な特徴は、本明細書の記述および添付図面から明らかになるであろう。 Since a high-speed IQ data transmission rate is required in a wireless communication system, wireless transmission using a high-level modulation method is usually performed on a wireless transmission path between a baseband processing device and a wireless device. This enables wireless transmission at a wireless transmission rate that is equal to or higher than the required IQ data transmission rate. However, when the communication quality of the wireless transmission path is deteriorated due to external factors such as rainy weather, there is a problem that wireless transmission using a high multilevel modulation method becomes difficult. Other problems and novel features will become apparent from the description of the specification and the accompanying drawings.
　本発明は、このような問題点を解決するためになされたものであり、無線伝送路の通信品質に応じた効率的な無線通信が可能な無線通信装置、無線通信システム及び無線通信方法を提供することを目的とする。 The present invention has been made to solve such problems, and provides a wireless communication apparatus, a wireless communication system, and a wireless communication method capable of efficient wireless communication according to the communication quality of a wireless transmission path. The purpose is to do.
　一実施の形態によれば、無線通信装置は、圧縮された圧縮ベースバンド信号を出力するベースバンド処理部と、前記圧縮ベースバンド信号を無線信号で伝送する第１の信号無線伝送部と、前記圧縮ベースバンド信号を無線伝送で受信する第２の信号無線伝送部と、前記第２の信号無線伝送部により受信された前記圧縮ベースバンド信号に基づいて無線信号を送信する無線部と、を備える。 According to an embodiment, a wireless communication device includes: a baseband processing unit that outputs a compressed compressed baseband signal; a first signal wireless transmission unit that transmits the compressed baseband signal as a wireless signal; A second signal wireless transmission unit that receives a compressed baseband signal by wireless transmission; and a wireless unit that transmits a wireless signal based on the compressed baseband signal received by the second signal wireless transmission unit. .
　また、他の実施の形態によれば、無線通信装置は、無線受信した無線信号に応じたベースバンド信号を圧縮して圧縮ベースバンド信号を出力する無線部と、前記圧縮ベースバンド信号を無線信号で伝送する第２の信号無線伝送部と、前記圧縮ベースバンド信号を無線伝送で受信する第１の信号無線伝送部と、前記第１の信号無線伝送部により受信された前記圧縮ベースバンド信号を復号して所定の処理を行うベースバンド処理部と、を備える。 According to another embodiment, the wireless communication apparatus includes a wireless unit that compresses a baseband signal corresponding to a wireless signal received wirelessly and outputs a compressed baseband signal, and the compressed baseband signal is a wireless signal. A second signal wireless transmission unit that transmits the compressed baseband signal, a first signal wireless transmission unit that receives the compressed baseband signal by wireless transmission, and the compressed baseband signal received by the first signal wireless transmission unit. And a baseband processing unit that performs predetermined processing by decoding.
　一実施の形態によれば、無線通信装置は、第１ベースバンド信号を生成するベースバンド処理装置と、前記第１ベースバンド信号を第１マイクロ波に変調して無線送信する第１無線伝送装置と、前記第１無線伝送装置との間の無線伝送路を介して無線受信した第１マイクロ波を前記第１ベースバンド信号に復調する第２無線伝送装置と、前記第２無線伝送装置によって復調された前記第１ベースバンド信号を第１高周波信号に変調して外部に無線送信する無線装置と、を備え、前記ベースバンド処理装置は、前記無線伝送路における通信品質に応じた圧縮率で前記第１ベースバンド信号を圧縮し、かつ、前記第１無線伝送装置は、前記無線伝送路における通信品質に応じた変調方式を用いて、圧縮された前記第１ベースバンド信号を前記第１マイクロ波に変調する。 According to one embodiment, a wireless communication device includes a baseband processing device that generates a first baseband signal, and a first wireless transmission device that modulates the first baseband signal into a first microwave and wirelessly transmits the first baseband signal. And a second wireless transmission device that demodulates the first microwave received wirelessly via a wireless transmission path with the first wireless transmission device into the first baseband signal, and a demodulation by the second wireless transmission device A wireless device that modulates the first baseband signal thus generated into a first high-frequency signal and wirelessly transmits the signal to the outside, wherein the baseband processing device has a compression rate according to communication quality in the wireless transmission path. The first wireless transmission device compresses the first baseband signal, and the first wireless transmission device uses the modulation method according to the communication quality in the wireless transmission path to convert the compressed first baseband signal to the first wireless baseband signal. To modulate the microwave.
　また、他の実施の形態によれば、無線通信装置は、第１ベースバンド信号を生成するベースバンド処理装置と、前記第１ベースバンド信号を分割した第１及び第２分割ベースバンド信号のうち前記第１分割ベースバンド信号を第１マイクロ波に変調して無線送信する第１無線伝送装置と、前記第２分割ベースバンド信号を第２マイクロ波に変調して無線送信する第２無線伝送装置と、前記第１無線伝送装置との間の第１無線伝送路を介して無線受信した第１マイクロ波を前記第１分割ベースバンド信号に復調する第３無線伝送装置と、前記第２無線伝送装置との間の第２無線伝送路を介して無線受信した第２マイクロ波を前記第２分割ベースバンド信号に復調する第４無線伝送装置と、前記第３及び前記第４無線伝送装置によって復調された前記第１及び前記第２分割ベースバンド信号を合成することで再生された前記第１ベースバンド信号を、第１高周波信号に変調して外部に無線送信する無線装置と、を備え、前記第１及び前記第２無線伝送路のそれぞれの通信品質に応じた圧縮率で、前記第１ベースバンド信号、又は、前記第１及び前記第２分割ベースバンド信号が圧縮され、かつ、前記第１及び前記第２無線伝送路のそれぞれの通信品質に応じた変調方式を用いて、圧縮された前記第１及び前記第２分割ベースバンド信号がそれぞれ前記第１及び前記第２マイクロ波に変調される。 According to another embodiment, a wireless communication device includes: a baseband processing device that generates a first baseband signal; and first and second divided baseband signals obtained by dividing the first baseband signal. A first wireless transmission device that modulates the first divided baseband signal into a first microwave and wirelessly transmits the first wireless transmission device, and a second wireless transmission device that modulates the second divided baseband signal into a second microwave and wirelessly transmits the modulated signal And a third wireless transmission device that demodulates a first microwave received wirelessly via a first wireless transmission path between the first wireless transmission device and the first divided baseband signal, and the second wireless transmission A fourth wireless transmission device that demodulates the second microwave received wirelessly via the second wireless transmission path to the device into the second divided baseband signal; and demodulated by the third and fourth wireless transmission devices Is A wireless device that modulates the first baseband signal reproduced by combining the first and second divided baseband signals into a first high-frequency signal and wirelessly transmits the first high-frequency signal to the outside; And the first baseband signal or the first and second divided baseband signals are compressed at a compression rate according to the communication quality of each of the second wireless transmission lines, and the first and the second The compressed first and second divided baseband signals are modulated into the first and second microwaves, respectively, using a modulation scheme corresponding to the communication quality of each second wireless transmission path.
　一実施の形態によれば、無線通信方法は、第１ベースバンド信号をベースバンド処理装置により生成するステップと、前記第１ベースバンド信号を第１マイクロ波に変調して無線送信するステップと、無線受信した前記第１マイクロ波を前記第１ベースバンド信号に復調するステップと、復調された前記第１ベースバンド信号を第１高周波信号に変調して外部に無線送信するステップと、を備え、前記ベースバンド処理装置ではマイクロ波が伝送される無線伝送路の通信品質に応じた圧縮率で前記第１ベースバンド信号が圧縮され、かつ、前記無線伝送路における通信品質に応じた変調方式を用いて、圧縮された前記第１ベースバンド信号が前記第１マイクロ波に変調される。 According to an embodiment, a wireless communication method includes generating a first baseband signal by a baseband processing device, modulating the first baseband signal to a first microwave, and wirelessly transmitting the first baseband signal, Demodulating the first microwave received wirelessly into the first baseband signal; and modulating the demodulated first baseband signal into a first high frequency signal and wirelessly transmitting to the outside, In the baseband processing device, the first baseband signal is compressed at a compression rate according to the communication quality of the wireless transmission path through which the microwave is transmitted, and a modulation method according to the communication quality in the wireless transmission path is used. Thus, the compressed first baseband signal is modulated into the first microwave.
　また、他の実施の形態によれば、無線通信方法は、第１ベースバンド信号を生成するステップと、前記第１ベースバンド信号を分割した第１及び第２分割ベースバンド信号のうち前記第１分割ベースバンド信号を第１マイクロ波に変調して無線送信するステップと、前記第２分割ベースバンド信号を第２マイクロ波に変調して無線送信するステップと、無線受信した第１マイクロ波を前記第１分割ベースバンド信号に復調するステップと、無線受信した第２マイクロ波を前記第２分割ベースバンド信号に復調するステップと、前記第１及び前記第２分割ベースバンド信号を合成することで再生された前記第１ベースバンド信号を、第１高周波信号に変調して外部に無線送信するステップと、を備え、マイクロ波が伝送される無線伝送路の通信品質に応じた圧縮率で、前記第１ベースバンド信号、又は、前記第１及び前記第２分割ベースバンド信号が圧縮され、かつ、前記無線伝送路の通信品質に応じた変調方式を用いて、圧縮された前記第１及び前記第２分割ベースバンド信号がそれぞれ前記第１及び前記第２マイクロ波に変調される。 According to another embodiment, a wireless communication method includes: generating a first baseband signal; and first and second divided baseband signals obtained by dividing the first baseband signal. Modulating the divided baseband signal to a first microwave and wirelessly transmitting; modulating the second divided baseband signal to a second microwave and wirelessly transmitting; and receiving the first microwave received wirelessly Demodulating the first divided baseband signal, demodulating the second microwave received wirelessly to the second divided baseband signal, and combining the first and second divided baseband signals to reproduce Modulating the first baseband signal thus obtained into a first high-frequency signal and wirelessly transmitting the signal to the outside, through a wireless transmission path through which microwaves are transmitted. The first baseband signal or the first and second divided baseband signals are compressed at a compression rate according to quality, and using a modulation scheme according to the communication quality of the wireless transmission path, The compressed first and second divided baseband signals are modulated into the first and second microwaves, respectively.
　前記一実施の形態によれば、無線伝送路の通信品質に応じた効率的な無線通信が可能な無線通信装置、無線通信システム及び無線通信方法を提供することができる。 According to the embodiment, it is possible to provide a wireless communication device, a wireless communication system, and a wireless communication method capable of efficient wireless communication according to the communication quality of the wireless transmission path.
実施の形態１にかかる無線通信装置を示すブロック図である。1 is a block diagram showing a wireless communication apparatus according to a first exemplary embodiment. 実施の形態２にかかる基地局装置を示すブロック図である。FIG. 3 is a block diagram of a base station apparatus according to a second embodiment. ＩＱデータの圧縮率及び変調方式と、無線伝送レートと、の関係を示す図である。It is a figure which shows the relationship between the compression rate and modulation system of IQ data, and a radio transmission rate. ＩＱデータの圧縮率及び変調方式と、無線伝送レートと、の関係を表す表であるである。It is a table | surface showing the relationship between the compression rate and modulation system of IQ data, and a radio | wireless transmission rate. 図２に示す基地局装置に設けられたベースバンド処理装置及びベースバンド処理装置側の無線伝送装置の具体的構成例を示すブロック図である。FIG. 3 is a block diagram illustrating a specific configuration example of a baseband processing device provided in the base station device illustrated in FIG. 2 and a wireless transmission device on the baseband processing device side. 図２に示す基地局装置に設けられた無線装置及び無線装置側の無線伝送装置の具体的構成例を示すブロック図である。FIG. 3 is a block diagram illustrating a specific configuration example of a wireless device provided in the base station device illustrated in FIG. 2 and a wireless transmission device on the wireless device side. ＣＰＲＩ規格の信号のフレーム形式を示す図である。It is a figure which shows the frame format of the signal of a CPRI standard. 無線伝送装置間で送受信される無線信号のフレーム形式を示す図である。It is a figure which shows the frame format of the radio signal transmitted / received between radio | wireless transmission apparatuses. 図２に示す基地局装置の第１変形例を示すブロック図である。It is a block diagram which shows the 1st modification of the base station apparatus shown in FIG. 図９に示す基地局装置に設けられたベースバンド処理装置及びベースバンド処理装置側の無線伝送装置の具体的構成例を示すブロック図である。FIG. 10 is a block diagram illustrating a specific configuration example of a baseband processing device provided in the base station device illustrated in FIG. 9 and a wireless transmission device on the baseband processing device side. 図９に示す基地局装置に設けられた無線装置及び無線装置側の無線伝送装置の具体的構成例を示すブロック図である。FIG. 10 is a block diagram illustrating a specific configuration example of a wireless device provided in the base station device illustrated in FIG. 9 and a wireless transmission device on the wireless device side. 図１０及び図１１に示す構成において適用されたイーサネット規格の信号の構成例を示す図である。It is a figure which shows the structural example of the signal of the Ethernet standard applied in the structure shown in FIG.10 and FIG.11. 図２に示す基地局装置の第２変形例に設けられたベースバンド処理装置及びベースバンド処理装置側の無線伝送装置の具体的構成例を示すブロック図である。It is a block diagram which shows the specific structural example of the radio transmission apparatus by the baseband processing apparatus and baseband processing apparatus side provided in the 2nd modification of the base station apparatus shown in FIG. 図２に示す基地局装置の第２変形例に設けられた無線装置及び無線装置側の無線伝送装置の具体的構成例を示すブロック図である。FIG. 6 is a block diagram illustrating a specific configuration example of a wireless device and a wireless transmission device on a wireless device side provided in a second modification of the base station device illustrated in FIG. 2. 図１３及び図１４に示す構成において適用されたイーサネット規格の信号の構成例を示す図である。It is a figure which shows the structural example of the signal of the Ethernet standard applied in the structure shown in FIG.13 and FIG.14. 実施の形態３にかかる基地局装置を示すブロック図である。FIG. 7 is a block diagram of a base station apparatus according to a third embodiment. 図１６に示す基地局装置のベースバンド処理装置側に設けられた２つの無線伝送装置の第１の具体的構成例を示すブロック図である。FIG. 17 is a block diagram showing a first specific configuration example of two radio transmission apparatuses provided on the baseband processing apparatus side of the base station apparatus shown in FIG. 16. 図１６に示す基地局装置のベースバンド処理装置側に設けられた無線伝送装置の第２の具体的構成例を示すブロック図である。It is a block diagram which shows the 2nd specific structural example of the radio transmission apparatus provided in the baseband processing apparatus side of the base station apparatus shown in FIG. 図１６に示す基地局装置のベースバンド処理装置側に設けられた無線伝送装置の第３の具体的構成例を示すブロック図である。FIG. 17 is a block diagram illustrating a third specific configuration example of the radio transmission apparatus provided on the baseband processing apparatus side of the base station apparatus illustrated in FIG. 16. 実施の形態４にかかる基地局装置を示すブロック図である。FIG. 6 is a block diagram of a base station apparatus according to a fourth embodiment. 図２０に示す基地局装置に設けられたベースバンド処理装置及びベースバンド処理装置側の無線伝送装置の具体的構成例を示すブロック図である。FIG. 21 is a block diagram illustrating a specific configuration example of a baseband processing device provided in the base station device illustrated in FIG. 20 and a wireless transmission device on the baseband processing device side. 図２０に示す基地局装置に設けられた無線装置及び無線装置側の無線伝送装置の具体的構成例を示すブロック図である。FIG. 21 is a block diagram illustrating a specific configuration example of a radio apparatus provided in the base station apparatus illustrated in FIG. 20 and a radio transmission apparatus on the radio apparatus side. 図２０に示す基地局装置の変形例におけるベースバンド処理装置及びベースバンド処理装置側の無線伝送装置の具体的構成例を示すブロック図である。FIG. 21 is a block diagram illustrating a specific configuration example of a baseband processing device and a wireless transmission device on the baseband processing device side in a modification of the base station device illustrated in FIG. 20. 図２０に示す基地局装置に変形例における無線装置及び無線装置側の無線伝送装置の具体的構成例を示すブロック図である。FIG. 21 is a block diagram illustrating a specific configuration example of a radio apparatus and a radio transmission apparatus on the radio apparatus side in a modification example of the base station apparatus illustrated in FIG. 20. 実施形態に係る基地局装置の構成例を示すブロック図である。It is a block diagram which shows the structural example of the base station apparatus which concerns on embodiment.
　以下、図面を参照しつつ、実施の形態について説明する。なお、図面は簡略的なものであるから、この図面の記載を根拠として実施の形態の技術的範囲を狭く解釈してはならない。また、同一の要素には、同一の符号を付し、重複する説明は省略する。 Hereinafter, embodiments will be described with reference to the drawings. Since the drawings are simple, the technical scope of the embodiments should not be narrowly interpreted based on the description of the drawings. Moreover, the same code | symbol is attached | subjected to the same element and the overlapping description is abbreviate | omitted.
　以下の実施の形態においては便宜上その必要があるときは、複数のセクションまたは実施の形態に分割して説明するが、特に明示した場合を除き、それらはお互いに無関係なものではなく、一方は他方の一部または全部の変形例、応用例、詳細説明、補足説明等の関係にある。また、以下の実施の形態において、要素の数等（個数、数値、量、範囲等を含む）に言及する場合、特に明示した場合および原理的に明らかに特定の数に限定される場合等を除き、その特定の数に限定されるものではなく、特定の数以上でも以下でもよい。 In the following embodiments, when it is necessary for the sake of convenience, the description will be divided into a plurality of sections or embodiments. However, unless otherwise specified, they are not irrelevant to each other. Are partly or entirely modified, application examples, detailed explanations, supplementary explanations, and the like. Further, in the following embodiments, when referring to the number of elements (including the number, numerical value, quantity, range, etc.), especially when clearly indicated and when clearly limited to a specific number in principle, etc. Except, it is not limited to the specific number, and may be more or less than the specific number.
　さらに、以下の実施の形態において、その構成要素（動作ステップ等も含む）は、特に明示した場合および原理的に明らかに必須であると考えられる場合等を除き、必ずしも必須のものではない。同様に、以下の実施の形態において、構成要素等の形状、位置関係等に言及するときは、特に明示した場合および原理的に明らかにそうでないと考えられる場合等を除き、実質的にその形状等に近似または類似するもの等を含むものとする。このことは、上記数等（個数、数値、量、範囲等を含む）についても同様である。 Furthermore, in the following embodiments, the constituent elements (including operation steps and the like) are not necessarily essential unless otherwise specified or apparently essential in principle. Similarly, in the following embodiments, when referring to the shapes, positional relationships, etc. of the components, etc., the shapes are substantially the same unless otherwise specified, or otherwise apparent in principle. And the like are included. The same applies to the above numbers and the like (including the number, numerical value, quantity, range, etc.).
＜実施の形態１＞
　図１は、実施の形態１にかかる基地局装置（無線通信装置）１０を示すブロック図である。本実施の形態に係る基地局装置１０では、ベースバンド処理部と無線部との間の無線伝送路の通信品質に応じた圧縮率でベースバンド信号を圧縮して無線伝送を行う。それにより、雨天等の外部要因により無線伝送路の通信品質が劣化した場合でも、所望の無線伝送レートを維持することができるため、効率的な無線通信が可能になる。以下、具体的に説明する。 <Embodiment 1>
FIG. 1 is a block diagram of a base station apparatus (wireless communication apparatus) 10 according to the first embodiment. In base station apparatus 10 according to the present embodiment, a baseband signal is compressed at a compression rate corresponding to the communication quality of the wireless transmission path between the baseband processing unit and the wireless unit, and wireless transmission is performed. Thereby, even when the communication quality of the wireless transmission path deteriorates due to external factors such as rainy weather, a desired wireless transmission rate can be maintained, so that efficient wireless communication is possible. This will be specifically described below.
　図１に示すように、基地局装置１０は、ユーザ端末（不図示）と無線通信を行う。なお、基地局装置１０とユーザ端末とによりＣ－ＲＡＮ等の無線通信システムが構成される。ユーザ端末は、例えば、携帯電話やノートＰＣ等の移動端末である。 As shown in FIG. 1, the base station apparatus 10 performs wireless communication with a user terminal (not shown). A radio communication system such as C-RAN is configured by the base station apparatus 10 and user terminals. The user terminal is, for example, a mobile terminal such as a mobile phone or a notebook PC.
　基地局装置１０は、ベースバンド処理部２０と、無線部３０と、ベースバンド処理部２０と無線部３０との間のデータの受け渡しを無線で行うための第１の信号無線伝送部４０及び第２の信号無線伝送部５０と、を備える。 The base station device 10 includes a baseband processing unit 20, a radio unit 30, a first signal radio transmission unit 40 and a first radio transmission unit 40 for wirelessly transferring data between the baseband processing unit 20 and the radio unit 30. 2 signal wireless transmission units 50.
　まず、基地局装置１０の送信経路について説明する。
　ベースバンド処理部２０は、図示しない上位装置から受信したデータに基づいてベースバンド信号を生成した後、当該ベースバンド信号を圧縮して圧縮ベースバンド信号を出力する。 First, the transmission path of the base station apparatus 10 will be described.
The baseband processing unit 20 generates a baseband signal based on data received from a host device (not shown), and then compresses the baseband signal to output a compressed baseband signal.
　第１の信号無線伝送部４０は、ベースバンド処理部２０から出力された圧縮ベースバンド信号をマイクロ波に変調して、無線送信する。 The first signal wireless transmission unit 40 modulates the compressed baseband signal output from the baseband processing unit 20 into a microwave and wirelessly transmits it.
　第２の信号無線伝送部５０は、第１の信号無線伝送部４０から無線送信されたマイクロ波を、無線受信する。第２の信号無線伝送部５０は、無線受信したマイクロ波を圧縮ベースバンド信号に復調する。そして、第２の信号無線伝送部５０は、この圧縮ベースバンド信号を無線部３０に対して出力する。 The second signal wireless transmission unit 50 wirelessly receives the microwave transmitted from the first signal wireless transmission unit 40. The second signal wireless transmission unit 50 demodulates the wirelessly received microwave into a compressed baseband signal. Then, the second signal radio transmission unit 50 outputs this compressed baseband signal to the radio unit 30.
　無線部３０は、第２の信号無線伝送部５０から出力された圧縮ベースバンド信号を復号して高周波信号に変調した後、外部に無線送信する。 The radio unit 30 decodes the compressed baseband signal output from the second signal radio transmission unit 50, modulates the compressed baseband signal into a high frequency signal, and wirelessly transmits the signal to the outside.
　ここで、無線通信システムでは、要求されるベースバンド信号の伝送レートが高速であるため、第１の信号無線伝送部４０，５０間の無線伝送路Ｌ１では、高多値の変調方式を用いた無線伝送が行われる。それにより、要求されるベースバンド信号の伝送レート以上の無線伝送レートでの無線伝送が可能となる。しかしながら、雨天等の外部要因によって第１の信号無線伝送部４０，５０間の無線伝送路Ｌ１の通信品質が劣化すると、高多値の変調方式を用いた無線伝送が困難になってしまう。そこで、ベースバンド処理部２０は、無線伝送路Ｌ１の通信品質に応じた圧縮率でベースバンド信号を圧縮して、圧縮ベースバンド信号を出力する。 Here, in the wireless communication system, since the required transmission rate of the baseband signal is high, the wireless transmission path L1 between the first signal wireless transmission units 40 and 50 uses a high-value modulation method. Wireless transmission is performed. This enables wireless transmission at a wireless transmission rate that is equal to or higher than the required transmission rate of the baseband signal. However, if the communication quality of the wireless transmission path L1 between the first signal wireless transmission units 40 and 50 deteriorates due to external factors such as rainy weather, wireless transmission using a high-level modulation method becomes difficult. Therefore, the baseband processing unit 20 compresses the baseband signal at a compression rate corresponding to the communication quality of the wireless transmission path L1, and outputs a compressed baseband signal.
　具体的には、無線伝送路Ｌ１の通信品質が劣化した場合、ベースバンド処理部２０は、低倍率から高倍率の圧縮率に切り替えてベースバンド信号を圧縮する。それにより、無線伝送路Ｌ１の通信品質が劣化した場合でも、要求されるベースバンド信号の伝送レート以上に無線伝送レートを維持することができるため、確実な無線通信が可能である。 Specifically, when the communication quality of the wireless transmission path L1 deteriorates, the baseband processing unit 20 compresses the baseband signal by switching from the low magnification to the high magnification compression rate. As a result, even when the communication quality of the wireless transmission path L1 is deteriorated, the wireless transmission rate can be maintained at or higher than the required transmission rate of the baseband signal, so that reliable wireless communication is possible.
　それに対し、無線伝送路Ｌ１の通信品質が向上した場合、ベースバンド処理部２０は、高倍率から低倍率の圧縮率に切り替えてベースバンド信号を圧縮する。それにより、低多値から高多値の変調方式に切り替えてベースバンド信号をマイクロ波に変調したうえで無線伝送することができるため、高品質な無線通信が可能になる。 On the other hand, when the communication quality of the wireless transmission path L1 is improved, the baseband processing unit 20 compresses the baseband signal by switching from the high magnification to the low magnification. As a result, since the baseband signal can be modulated into a microwave by switching from the low-multilevel modulation system to the high-multilevel modulation system, high-quality wireless communication is possible.
　続いて、基地局装置１０の受信経路について説明する。
　無線部３０は、外部から無線受信した高周波信号をベースバンド信号に復調した後、当該ベースバンド信号を圧縮して圧縮ベースバンド信号を出力する。 Next, the reception path of the base station device 10 will be described.
The radio unit 30 demodulates a high-frequency signal received wirelessly from the outside into a baseband signal, and then compresses the baseband signal to output a compressed baseband signal.
　第２の信号無線伝送部５０は、無線部３０から出力された圧縮ベースバンド信号をマイクロ波に変調して、無線送信する。 The second signal wireless transmission unit 50 modulates the compressed baseband signal output from the wireless unit 30 into a microwave and wirelessly transmits it.
　第１の信号無線伝送部４０は、第２の信号無線伝送部５０から無線送信されたマイクロ波を、無線受信する。第１の信号無線伝送部４０は、無線受信したマイクロ波を圧縮ベースバンド信号に復調する。そして、第１の信号無線伝送部４０は、この圧縮ベースバンド信号をベースバンド処理部２０に対して出力する。 The first signal radio transmission unit 40 wirelessly receives the microwave transmitted from the second signal radio transmission unit 50. The first signal wireless transmission unit 40 demodulates the wirelessly received microwave into a compressed baseband signal. Then, the first signal radio transmission unit 40 outputs the compressed baseband signal to the baseband processing unit 20.
　ベースバンド処理部２０は、第１の信号無線伝送部４０から出力された圧縮ベースバンド信号を復号して所定の処理を行う。例えば、ベースバンド処理部２０は、その処理結果を上位装置（不図示）に対して出力する。 The baseband processing unit 20 decodes the compressed baseband signal output from the first signal radio transmission unit 40 and performs predetermined processing. For example, the baseband processing unit 20 outputs the processing result to a higher-level device (not shown).
　ここで、無線部３０は、第１の信号無線伝送部４０，５０間の無線伝送路Ｌ１の通信品質に応じた圧縮率でベースバンド信号を圧縮して、圧縮ベースバンド信号を出力する。 Here, the radio unit 30 compresses the baseband signal at a compression rate corresponding to the communication quality of the radio transmission path L1 between the first signal radio transmission units 40 and 50, and outputs the compressed baseband signal.
　具体的には、無線伝送路Ｌ１の通信品質が劣化した場合、無線部３０は、低倍率から高倍率の圧縮率に切り替えてベースバンド信号を圧縮する。それにより、無線伝送路Ｌ１の通信品質が劣化した場合でも、要求されるベースバンド信号の伝送レート以上に無線伝送レートを維持することができるため、確実な無線通信が可能である。 Specifically, when the communication quality of the wireless transmission path L1 deteriorates, the wireless unit 30 compresses the baseband signal by switching from a low magnification to a high magnification compression rate. As a result, even when the communication quality of the wireless transmission path L1 is deteriorated, the wireless transmission rate can be maintained at or higher than the required transmission rate of the baseband signal, so that reliable wireless communication is possible.
　それに対し、無線伝送路Ｌ１の通信品質が向上した場合、無線部３０は、高倍率から低倍率の圧縮率に切り替えてベースバンド信号を圧縮する。それにより、低多値から高多値の変調方式に切り替えてベースバンド信号をマイクロ波に変調したうえで無線伝送することができるため、高品質な無線通信が可能になる。 On the other hand, when the communication quality of the wireless transmission line L1 is improved, the wireless unit 30 compresses the baseband signal by switching from the high magnification to the low magnification compression rate. As a result, since the baseband signal can be modulated into a microwave by switching from the low-multilevel modulation system to the high-multilevel modulation system, high-quality wireless communication is possible.
＜実施の形態２＞
　図２は、実施の形態２にかかる基地局装置（無線通信装置）１を示すブロック図である。本実施の形態に係る基地局装置１では、ベースバンド処理装置と無線装置との間の無線伝送路の通信品質に応じた圧縮率でベースバンド信号が圧縮され、かつ、無線伝送路の通信品質に応じた変調方式を用いて圧縮後のベースバンド信号がマイクロ波に変調された後、無線伝送される。それにより、雨天等の外部要因により無線伝送路の通信品質が劣化した場合でも、所望の無線伝送レートを維持することができるため、効率的な無線通信が可能になる。以下、具体的に説明する。 <Embodiment 2>
FIG. 2 is a block diagram of the base station device (wireless communication device) 1 according to the second embodiment. In base station apparatus 1 according to the present embodiment, the baseband signal is compressed at a compression rate corresponding to the communication quality of the radio transmission path between the baseband processing apparatus and the radio apparatus, and the communication quality of the radio transmission path The baseband signal after compression is modulated into a microwave by using a modulation method according to the above, and then wirelessly transmitted. Thereby, even when the communication quality of the wireless transmission path deteriorates due to external factors such as rainy weather, a desired wireless transmission rate can be maintained, so that efficient wireless communication is possible. This will be specifically described below.
　図２に示すように、基地局装置１は、図１の基地局装置１０に対応し、ユーザ端末（不図示）と無線通信を行う。なお、基地局装置１とユーザ端末とによりＣ－ＲＡＮ等の無線通信システムが構成される。ユーザ端末は、例えば、携帯電話やノートＰＣ等の移動端末である。 As shown in FIG. 2, the base station apparatus 1 corresponds to the base station apparatus 10 of FIG. 1 and performs wireless communication with a user terminal (not shown). A radio communication system such as C-RAN is configured by the base station apparatus 1 and user terminals. The user terminal is, for example, a mobile terminal such as a mobile phone or a notebook PC.
　基地局装置１は、ベースバンド処理部２０に対応するベースバンド処理装置（ＢＢＵ）２と、無線部３０に対応する無線装置（ＲＲＨ）３と、ベースバンド処理装置２と無線装置３との間のデータの受け渡しを無線で行うための無線伝送装置４（第１の信号無線伝送部４０に対応）及び無線伝送装置５（第２の信号無線伝送部５０に対応）と、を備える。また、無線伝送装置４にはアンテナＡ１が設けられ、無線伝送装置５にはアンテナＡ２が設けられ、無線装置３にはアンテナＡ３が設けられる。 The base station device 1 includes a baseband processing device (BBU) 2 corresponding to the baseband processing unit 20, a radio device (RRH) 3 corresponding to the radio unit 30, and between the baseband processing device 2 and the radio device 3. The wireless transmission device 4 (corresponding to the first signal wireless transmission unit 40) and the wireless transmission device 5 (corresponding to the second signal wireless transmission unit 50) are provided. The wireless transmission device 4 is provided with an antenna A1, the wireless transmission device 5 is provided with an antenna A2, and the wireless device 3 is provided with an antenna A3.
　まず、基地局装置１の送信経路について説明する。
　ベースバンド処理装置２は、図示しない上位装置から受信したデータに基づいてＩＱデータ（ベースバンド信号）を生成する。なお、図２の例では、ベースバンド処理装置２と無線装置３との間のデータインタフェースには、ＣＰＲＩ規格が採用されている。したがって、ベースバンド処理装置２は、ＣＰＲＩ規格のＩＱデータ（以下、ＣＰＲＩ信号とも称す）を無線伝送装置４に対して出力する。 First, the transmission path of the base station apparatus 1 will be described.
The baseband processing device 2 generates IQ data (baseband signal) based on data received from a host device (not shown). In the example of FIG. 2, the CPRI standard is adopted for the data interface between the baseband processing device 2 and the wireless device 3. Accordingly, the baseband processing device 2 outputs IQ data of the CPRI standard (hereinafter also referred to as “CPRI signal”) to the wireless transmission device 4.
　無線伝送装置４は、ベースバンド処理装置２から光ケーブルを介して供給されたＣＰＲＩ規格のＩＱデータをマイクロ波に変調して、アンテナＡ１を介して無線送信する。 The wireless transmission device 4 modulates IQ data of the CPRI standard supplied from the baseband processing device 2 via an optical cable into a microwave and wirelessly transmits the microwave data via the antenna A1.
　無線伝送装置５は、無線伝送装置４からアンテナＡ１を介して無線送信されたマイクロ波を、アンテナＡ２を介して無線受信する。そして、無線伝送装置５は、無線受信したマイクロ波をＩＱデータ（ベースバンド信号）に復調する。そして、無線伝送装置５は、このＣＰＲＩ規格のＩＱデータを無線装置３に対して出力する。 The wireless transmission device 5 wirelessly receives the microwave transmitted from the wireless transmission device 4 via the antenna A1 via the antenna A2. The wireless transmission device 5 demodulates the wirelessly received microwave into IQ data (baseband signal). Then, the wireless transmission device 5 outputs this CPRI standard IQ data to the wireless device 3.
　無線装置３は、無線伝送装置５から光ケーブルを介して供給されたＣＰＲＩ規格のＩＱデータを高周波信号に変調する。この高周波信号は、アンテナＡ３を介して外部に無線送信され、ユーザ端末によって受信される。 The wireless device 3 modulates the CPRI standard IQ data supplied from the wireless transmission device 5 via the optical cable into a high-frequency signal. This high frequency signal is wirelessly transmitted to the outside via the antenna A3 and received by the user terminal.
　ここで、無線通信システムでは、要求されるＩＱデータの伝送レートが高速であるため、無線伝送装置４，５間の無線伝送路Ｌ１では、高多値の変調方式を用いた無線伝送が行われる。それにより、要求されるＩＱデータの伝送レート以上の無線伝送レートでの無線伝送が可能となる。しかしながら、雨天等の外部要因によって無線伝送装置４，５間の無線伝送路Ｌ１の通信品質が劣化すると、高多値の変調方式を用いた無線伝送が困難になってしまう。 Here, since the required IQ data transmission rate is high in the wireless communication system, wireless transmission using a high-level modulation method is performed on the wireless transmission path L1 between the wireless transmission devices 4 and 5. . This enables wireless transmission at a wireless transmission rate that is equal to or higher than the required IQ data transmission rate. However, when the communication quality of the wireless transmission path L1 between the wireless transmission devices 4 and 5 deteriorates due to external factors such as rainy weather, wireless transmission using a high multilevel modulation method becomes difficult.
　そこで、ベースバンド処理装置２は、無線伝送路Ｌ１の通信品質に応じた圧縮率でＩＱデータ（ベースバンド信号）を圧縮するとともに、無線伝送装置４は、無線伝送路Ｌ１の通信品質に応じた変調方式を用いてＩＱデータを無線伝送用のマイクロ波に変調する。 Therefore, the baseband processing device 2 compresses IQ data (baseband signal) at a compression rate corresponding to the communication quality of the wireless transmission path L1, and the wireless transmission device 4 responds to the communication quality of the wireless transmission path L1. The IQ data is modulated into a microwave for wireless transmission using a modulation method.
　具体的には、無線伝送路Ｌ１の通信品質が劣化した場合、ベースバンド処理装置２は、低倍率から高倍率の圧縮率に切り替えてＩＱデータを圧縮する。また、無線伝送装置４は、高多値から低多値の変調方式に切り替えて圧縮後のＩＱデータをマイクロ波に変調する。それにより、無線伝送路Ｌ１の通信品質が劣化した場合でも、無線伝送可能な変調方式を選択し、かつ、要求されるＩＱデータの伝送レート以上に無線伝送レートを維持することができるため、確実な無線通信が可能である。 Specifically, when the communication quality of the wireless transmission path L1 deteriorates, the baseband processing device 2 switches the compression rate from the low magnification to the high magnification and compresses the IQ data. In addition, the wireless transmission device 4 switches from the high multilevel to the low multilevel modulation method, and modulates the compressed IQ data into microwaves. As a result, even when the communication quality of the wireless transmission path L1 is deteriorated, a modulation method capable of wireless transmission can be selected and the wireless transmission rate can be maintained higher than the required IQ data transmission rate. Wireless communication is possible.
　それに対し、無線伝送路Ｌ１の通信品質が向上した場合、ベースバンド処理装置２は、高倍率から低倍率の圧縮率に切り替えてＩＱデータを圧縮する。また、無線伝送装置４は、低多値から高多値の変調方式に切り替えて圧縮後のＩＱデータをマイクロ波に変調する。それにより、高品質な無線通信が可能になる。 On the other hand, when the communication quality of the wireless transmission path L1 is improved, the baseband processing device 2 switches the compression rate from high to low and compresses IQ data. In addition, the wireless transmission device 4 switches from the low multi-value to the high multi-value modulation method, and modulates the compressed IQ data into microwaves. Thereby, high-quality wireless communication becomes possible.
　続いて、基地局装置１の受信経路について説明する。
　無線装置３は、外部からアンテナＡ３を介して無線受信した高周波信号をＩＱデータ（ベースバンド信号）に復調する。そして、無線装置３は、このＣＰＲＩ規格のＩＱデータを無線伝送装置５に対して出力する。 Subsequently, the reception path of the base station apparatus 1 will be described.
The wireless device 3 demodulates a high frequency signal wirelessly received from the outside via the antenna A3 into IQ data (baseband signal). Then, the wireless device 3 outputs the CPRI standard IQ data to the wireless transmission device 5.
　無線伝送装置５は、無線装置３から光ケーブルを介して供給されたＣＰＲＩ規格のＩＱデータをマイクロ波に変調して、アンテナＡ２を介して無線送信する。 The wireless transmission device 5 modulates IQ data of the CPRI standard supplied from the wireless device 3 via the optical cable into a microwave and wirelessly transmits the microwave data via the antenna A2.
　無線伝送装置４は、無線伝送装置５からアンテナＡ２を介して無線送信されたマイクロ波を、アンテナＡ１を介して無線受信する。そして、無線伝送装置４は、無線受信したマイクロ波をＩＱデータ（ベースバンド信号）に復調する。そして、無線伝送装置４は、このＣＰＲＩ規格のＩＱデータをベースバンド処理装置２に対して出力する。 The wireless transmission device 4 wirelessly receives the microwave transmitted from the wireless transmission device 5 via the antenna A2 via the antenna A1. Then, the wireless transmission device 4 demodulates the wirelessly received microwave into IQ data (baseband signal). The wireless transmission device 4 then outputs this CPRI standard IQ data to the baseband processing device 2.
　ベースバンド処理装置２は、無線伝送装置４から光ケーブルを介して供給されたＣＰＲＩ規格のＩＱデータに基づいて所定の処理を実行する。例えば、ベースバンド処理装置２は、その処理結果を上位装置（不図示）に対して出力する。 The baseband processing device 2 executes predetermined processing based on IQ data of the CPRI standard supplied from the wireless transmission device 4 via the optical cable. For example, the baseband processing device 2 outputs the processing result to a higher-level device (not shown).
　ここで、無線装置３は、無線伝送装置４，５間の無線伝送路Ｌ１の通信品質に応じた圧縮率でＩＱデータ（ベースバンド信号）を圧縮するとともに、無線伝送装置５は、無線伝送路Ｌ１の通信品質に応じた変調方式を用いてＩＱデータをマイクロ波に変調する。 Here, the wireless device 3 compresses IQ data (baseband signal) at a compression rate according to the communication quality of the wireless transmission path L1 between the wireless transmission devices 4 and 5, and the wireless transmission device 5 The IQ data is modulated into microwaves using a modulation method corresponding to the communication quality of L1.
　具体的には、無線伝送路Ｌ１の通信品質が劣化した場合、無線装置３は、低倍率から高倍率の圧縮率に切り替えてＩＱデータを圧縮する。また、無線伝送装置５は、高多値から低多値の変調方式に切り替えて圧縮後のＩＱデータをマイクロ波に変調する。それにより、無線伝送路Ｌ１の通信品質が劣化した場合でも、無線伝送可能な変調方式を選択し、かつ、要求されるＩＱデータの伝送レート以上の無線伝送レートを維持することができるため、確実な無線通信が可能である。 Specifically, when the communication quality of the wireless transmission path L1 deteriorates, the wireless device 3 switches the compression rate from low to high and compresses IQ data. Further, the wireless transmission device 5 switches the high multi-value to the low multi-value modulation method, and modulates the compressed IQ data into microwaves. As a result, even when the communication quality of the wireless transmission path L1 deteriorates, a modulation scheme capable of wireless transmission can be selected and a wireless transmission rate higher than the required IQ data transmission rate can be maintained. Wireless communication is possible.
　それに対し、無線伝送路Ｌ１の通信品質が向上した場合、無線装置３は、高倍率から低倍率の圧縮率に切り替えてＩＱデータを圧縮する。また、無線伝送装置５は、低多値から高多値の変調方式に切り替えて圧縮後のＩＱデータをマイクロ波に変調する。それにより、高品質な無線通信が可能になる。 On the other hand, when the communication quality of the wireless transmission line L1 is improved, the wireless device 3 compresses the IQ data by switching from a high magnification to a low magnification. In addition, the wireless transmission device 5 switches the low-multilevel to the high-multilevel modulation method, and modulates the compressed IQ data into microwaves. Thereby, high-quality wireless communication becomes possible.
　なお、ＩＱデータの圧縮に要する時間を考慮して、圧縮率を切り替えるときの通信品質レベル（閾値）と変調方式を切り替えるときの通信品質レベル（閾値）とに差を設けてもよい。それにより、例えば、無線伝送路Ｌ１の通信品質が向上した場合、まず、変調方式が低多値から高多値に切り替わり、その後、圧縮率が高倍率から低倍率に切り替わる。他方、無線伝送路Ｌ１の通信品質が劣化した場合、まず、圧縮率が低倍率から高倍率に切り替わり、その後、変調方式が高多値から低多値に切り替わる。それにより、常に、要求されるＩＱデータの伝送レート以上の無線伝送レートを維持することができるため、確実な無線通信が可能である。 Note that in consideration of the time required for IQ data compression, a difference may be provided between the communication quality level (threshold) when switching the compression rate and the communication quality level (threshold) when switching the modulation method. Thereby, for example, when the communication quality of the wireless transmission line L1 is improved, first, the modulation method is switched from the low multivalue to the high multivalue, and then the compression rate is switched from the high magnification to the low magnification. On the other hand, when the communication quality of the wireless transmission path L1 deteriorates, first, the compression rate is switched from low to high, and then the modulation method is switched from high to low. As a result, a wireless transmission rate equal to or higher than the required IQ data transmission rate can be maintained at all times, so that reliable wireless communication is possible.
　図３は、ＩＱデータの圧縮率及び変調方式と、無線伝送レートと、の関係を示す図である。図４は、図３に示す図に対応する表である。図３及び図４を参照すると、無線伝送レートは、変調方式が高多値になるほど大きくなり、低多値になるほど小さくなっている。また、無線伝送レートは、圧縮率が低倍率になるほど小さくなり、高倍率になるほど大きくなっている。 FIG. 3 is a diagram showing the relationship between the compression rate and modulation method of IQ data and the wireless transmission rate. FIG. 4 is a table corresponding to the diagram shown in FIG. Referring to FIGS. 3 and 4, the radio transmission rate increases as the modulation scheme becomes higher and lower as the modulation scheme becomes lower. In addition, the wireless transmission rate decreases as the compression rate decreases, and increases as the compression rate increases.
　ここで、高品質の無線通信を実現するには、変調方式はできるだけ高多値であることが好ましく、圧縮率はできるだけ低倍率であることが好ましい。そのため、無線伝送路Ｌ１の通信品質のもとで通信可能な最も高多値の変調方式が採用されるとともに、その場合に無線伝送レートがＩＱデータレート以上となるような最小倍率の圧縮率が選択されることが好ましい。 Here, in order to realize high-quality wireless communication, the modulation method is preferably as high as possible and the compression rate is preferably as low as possible. For this reason, the highest multi-level modulation method capable of communicating under the communication quality of the wireless transmission path L1 is adopted, and in this case, the compression ratio of the minimum magnification is set such that the wireless transmission rate is equal to or higher than the IQ data rate. Preferably it is selected.
　例えば、ＩＱデータレートが２５００Ｍｂｐｓである場合において、２５６ＱＡＭや１２８ＱＡＭの変調方式が採用された場合、１倍の圧縮率が選択される。６４ＱＡＭや３２ＱＡＭの変調方式が採用された場合、１．５倍の圧縮率が選択される。１６ＱＡＭの変調方式が採用された場合、２倍の圧縮率が選択される。また、ＱＰＳＫの変調方式が採用された場合、３．５倍の圧縮率が選択される。 For example, when the IQ data rate is 2500 Mbps and the 256QAM or 128QAM modulation scheme is adopted, a compression ratio of 1 is selected. When a 64QAM or 32QAM modulation scheme is employed, a compression ratio of 1.5 is selected. When the 16QAM modulation scheme is adopted, a compression ratio of 2 is selected. When the QPSK modulation method is employed, a compression ratio of 3.5 times is selected.
　このように、本実施の形態にかかる基地局装置１では、無線伝送路Ｌ１の通信品質に応じてＩＱデータの圧縮率及び圧縮後のＩＱデータの変調方式を切り替えることにより、効率的な無線通信が可能である。 As described above, the base station apparatus 1 according to the present embodiment switches the IQ data compression rate and the compressed IQ data modulation scheme according to the communication quality of the wireless transmission path L1, thereby enabling efficient wireless communication. Is possible.
　また、本実施の形態にかかる基地局装置１では、ＩＱデータの圧縮が、無線伝送装置４，５ではなく、ベースバンド処理装置２及び無線装置３内でそれぞれ行われている。それにより、ベースバンド処理装置２及び無線伝送装置４間の光ケーブルを伝搬するＣＰＲＩ信号が圧縮されるとともに、無線装置３及び無線伝送装置５間の光ケーブルを伝搬するＣＰＲＩ信号が圧縮されるため、ＣＰＲＩ規格のＯｐｔｉｏｎを下げることにより各光ケーブルにおいて消費される電力を低減することができる。 Further, in the base station apparatus 1 according to the present embodiment, the IQ data is compressed not in the wireless transmission apparatuses 4 and 5 but in the baseband processing apparatus 2 and the wireless apparatus 3, respectively. Accordingly, the CPRI signal propagating through the optical cable between the baseband processing device 2 and the radio transmission device 4 is compressed, and the CPRI signal propagating through the optical cable between the radio device 3 and the radio transmission device 5 is compressed. The power consumed in each optical cable can be reduced by lowering the option of the standard.
　また、１つのベースバンド処理装置２に対して複数の無線装置３が設けられる構成が採用された場合、ベースバンド処理装置２内でＩＱデータの圧縮が行われることにより、複数の無線伝送装置４内でそれぞれＩＱデータの圧縮が行われる場合と比較して、ＩＱデータの圧縮を一元管理することができるとともに、ＩＱデータを圧縮するための装置を少なくすることができる。 Further, when a configuration in which a plurality of wireless devices 3 are provided for one baseband processing device 2 is adopted, IQ data is compressed in the baseband processing device 2, so that the plurality of wireless transmission devices 4. Compared to the case where IQ data is compressed in each, the IQ data compression can be centrally managed and the number of devices for compressing IQ data can be reduced.
　なお、本実施の形態では、各ＩＯデータ圧縮部が、圧縮効率及び圧縮容易性の観点から、非可逆圧縮を行う構成であることを想定している。非可逆圧縮には、例えば高速フーリエ変換（ＦＦＴ；Fast Fourier Transform）が採用される。非可逆圧縮は、可逆圧縮と比較して、圧縮処理による伝送遅延が少ないというメリットがある。しかしながら、各ＩＯデータ圧縮部は、一定の圧縮効率を望めるのであれば、可逆圧縮を行う構成であってもよい。その場合、例えば、変調方式に応じて可逆圧縮の手法（予測符号化、ランレングス等）が切り替えられてもよい。あるいは、変調方式に応じて非可逆圧縮を行う構成と可逆圧縮を行う構成とが切り替えられてもよい。これは、以下に説明する実施の形態３，４においても同様のことが言える。 In this embodiment, it is assumed that each IO data compression unit is configured to perform irreversible compression from the viewpoint of compression efficiency and ease of compression. For the irreversible compression, for example, Fast Fourier Transform (FFT) is adopted. Lossy compression has an advantage that transmission delay due to compression processing is less than lossless compression. However, each IO data compression unit may be configured to perform lossless compression as long as a certain compression efficiency is desired. In this case, for example, a lossless compression method (predictive coding, run length, etc.) may be switched according to the modulation method. Or the structure which performs irreversible compression and the structure which performs lossless compression may be switched according to a modulation system. The same can be said for the third and fourth embodiments described below.
　また、本実施の形態ではＩＱデータが用いられた場合を例に説明したが、これに限られず、ＩＱデータ以外の任意のＰａｙｌｏａｄデータが用いられてもよい。これは、以下に説明する実施の形態３，４においても同様のことが言える。 In the present embodiment, the case where IQ data is used has been described as an example. However, the present invention is not limited to this, and arbitrary payload data other than IQ data may be used. The same can be said for the third and fourth embodiments described below.
（基地局装置１の具体的構成例）
　続いて、図２に示す基地局装置１の具体的構成例について説明する。
　図５は、ベースバンド処理装置２及び当該ベースバンド処理装置２側に設けられた無線伝送装置４の具体的構成例を示すブロック図である。図６は、無線装置３及び当該無線装置３側に設けられた無線伝送装置５の具体的構成例を示すブロック図である。 (Specific configuration example of base station apparatus 1)
Then, the specific structural example of the base station apparatus 1 shown in FIG. 2 is demonstrated.
FIG. 5 is a block diagram illustrating a specific configuration example of the baseband processing device 2 and the wireless transmission device 4 provided on the baseband processing device 2 side. FIG. 6 is a block diagram illustrating a specific configuration example of the wireless device 3 and the wireless transmission device 5 provided on the wireless device 3 side.
　ベースバンド処理装置２は、ベースバンド信号生成部２００と、ＩＱデータ圧縮部２０１と、ＣＰＲＩ信号送信部２０２と、ＣＰＲＩ信号受信部２０３と、ＩＱデータ復号部２０４と、を備える。 The baseband processing device 2 includes a baseband signal generation unit 200, an IQ data compression unit 201, a CPRI signal transmission unit 202, a CPRI signal reception unit 203, and an IQ data decoding unit 204.
　無線伝送装置４は、ＣＰＲＩ信号受信部４０１と、ＯＶＨ多重部４０２と、無線送信部４０３と、無線受信部４０４と、要求圧縮率決定部４０５と、ＯＶＨ抽出部４０６と、ＣＰＲＩ信号送信部４０７と、を備える。 The wireless transmission device 4 includes a CPRI signal reception unit 401, an OVH multiplexing unit 402, a wireless transmission unit 403, a wireless reception unit 404, a requested compression rate determination unit 405, an OVH extraction unit 406, and a CPRI signal transmission unit 407. And comprising.
　無線伝送装置５は、無線受信部５０１と、要求圧縮率決定部５０２と、ＯＶＨ抽出部５０３と、ＣＰＲＩ信号送信部５０４と、ＣＰＲＩ信号受信部５０５と、ＯＶＨ多重部５０６と、無線送信部５０７と、を備える。 The wireless transmission device 5 includes a wireless reception unit 501, a required compression rate determination unit 502, an OVH extraction unit 503, a CPRI signal transmission unit 504, a CPRI signal reception unit 505, an OVH multiplexing unit 506, and a wireless transmission unit 507. And comprising.
　無線装置３は、ＣＰＲＩ信号受信部３０１と、ＩＱデータ復号部３０２と、無線送信部３０３と、無線受信部３０４と、ＩＱデータ圧縮部３０５と、ＣＰＲＩ信号送信部３０６と、を備える。 The wireless device 3 includes a CPRI signal reception unit 301, an IQ data decoding unit 302, a wireless transmission unit 303, a wireless reception unit 304, an IQ data compression unit 305, and a CPRI signal transmission unit 306.
　まず、基地局装置１の送信経路について説明する。
　ベースバンド処理装置２において、ベースバンド信号生成部２００は、上位装置（不図示）から受信したデータに基づいてＩＱデータ（ベースバンド信号）Ｄ１を生成する。 First, the transmission path of the base station apparatus 1 will be described.
In the baseband processing device 2, the baseband signal generation unit 200 generates IQ data (baseband signal) D1 based on data received from a host device (not shown).
　ＩＱデータ圧縮部２０１は、無線伝送路Ｌ１の通信品質に応じた圧縮率（本例では、ＣＰＲＩ信号受信部２０３によって受信され、無線装置３側から要求された圧縮率情報ＲＱ１の圧縮率）ＲＱ１で、ＩＱデータＤ１を圧縮する。 The IQ data compression unit 201 is a compression rate according to the communication quality of the wireless transmission path L1 (in this example, the compression rate of the compression rate information RQ1 received by the CPRI signal receiving unit 203 and requested from the wireless device 3 side) RQ1. Thus, the IQ data D1 is compressed.
　例えば、無線伝送路Ｌ１の通信品質が劣化した場合、ＩＱデータ圧縮部２０１は、低倍率から高倍率の圧縮率に切り替えてＩＱデータＤ１を圧縮する。他方、無線伝送路Ｌ１の通信品質が向上した場合、ＩＱデータ圧縮部２０１は、高倍率から低倍率の圧縮率に切り替えてＩＱデータＤ１を圧縮する（詳細は後述）。 For example, when the communication quality of the wireless transmission path L1 deteriorates, the IQ data compression unit 201 compresses the IQ data D1 by switching from a low magnification to a high magnification compression rate. On the other hand, when the communication quality of the wireless transmission line L1 is improved, the IQ data compression unit 201 compresses the IQ data D1 by switching from a high magnification to a low magnification (details will be described later).
　ＣＰＲＩ信号送信部２０２は、圧縮されたＩＱデータＤ１及びその圧縮率情報ＲＱ１を、ＣＰＲＩ規格を満たすように変換したうえで送信する。 The CPRI signal transmission unit 202 transmits the compressed IQ data D1 and the compression rate information RQ1 after converting the data so as to satisfy the CPRI standard.
　図７は、ＣＰＲＩ規格の信号のフレーム形式を示す図である。図７を参照すると、ＣＰＲＩ規格の信号には、ＩＱデータの送受信が行われないVendor specific領域が一定間隔で設けられている。このVendor specific領域を用いて、ＩＱデータの圧縮率情報及び圧縮要求が送受信される。 FIG. 7 is a diagram showing a frame format of a CPRI standard signal. Referring to FIG. 7, a CPRI standard signal is provided with a Vendor specific area where IQ data is not transmitted and received at regular intervals. Using this Vendor custom-specific area, IQ data compression rate information and compression requests are transmitted and received.
　無線伝送装置４において、ＣＰＲＩ信号受信部４０１は、ベースバンド処理装置２のＣＰＲＩ信号送信部２０２から光ケーブルを介して供給されたＣＰＲＩ規格のＩＱデータＤ１（圧縮率情報ＲＱ１含む）を受信する。 In the wireless transmission device 4, the CPRI signal receiving unit 401 receives the CPRI standard IQ data D1 (including the compression rate information RQ1) supplied from the CPRI signal transmitting unit 202 of the baseband processing device 2 via the optical cable.
　要求圧縮率決定部４０５は、無線伝送路Ｌ１の通信品質を表す指標の一つである、無線受信部４０４によって無線受信されたマイクロ波ＭＷ２のＣＮ雑音比、に基づいて、無線装置３側においてマイクロ波ＭＷ２に変調される前のＩＱデータＤ２の圧縮率を決定し、新たな圧縮率情報ＲＱ２として出力する。 Based on the CN noise ratio of the microwave MW2 wirelessly received by the wireless reception unit 404, which is one of the indices indicating the communication quality of the wireless transmission path L1, the required compression rate determination unit 405 is configured on the wireless device 3 side. The compression rate of the IQ data D2 before being modulated by the microwave MW2 is determined and output as new compression rate information RQ2.
　例えば、無線伝送路Ｌ１の通信品質が劣化してマイクロ波ＭＷ２のＣＮ雑音比が小さくなった場合、要求圧縮率決定部４０５は、無線装置３側から新たに送信されるＩＱデータＤ２に対する圧縮率を大きくする。他方、無線伝送路Ｌ１の通信品質が向上してマイクロ波ＭＷ２のＣＮ雑音比が大きくなった場合、要求圧縮率決定部４０５は、無線装置３側から新たに送信されるＩＱデータＤ２に対する圧縮率を小さくする。 For example, when the communication quality of the wireless transmission path L1 deteriorates and the CN noise ratio of the microwave MW2 becomes small, the requested compression rate determination unit 405 compresses the IQ data D2 newly transmitted from the wireless device 3 side. Increase On the other hand, when the communication quality of the wireless transmission path L1 is improved and the CN noise ratio of the microwave MW2 is increased, the requested compression rate determination unit 405 compresses the IQ data D2 newly transmitted from the wireless device 3 side. Make it smaller.
　ＯＶＨ多重部４０２は、圧縮されたＩＱデータＤ１（圧縮率情報ＲＱ１含む）と、ＩＱデータＤ２に対する新たな圧縮率情報ＲＱ２と、を多重化する。 OVH multiplexing section 402 multiplexes compressed IQ data D1 (including compression ratio information RQ1) and new compression ratio information RQ2 for IQ data D2.
　無線送信部４０３は、ＯＶＨ多重部４０２によって多重化されたデータ（ベースバンド信号）をマイクロ波ＭＷ１に変調して、アンテナＡ１を介して無線送信する。 The wireless transmission unit 403 modulates the data (baseband signal) multiplexed by the OVH multiplexing unit 402 into the microwave MW1 and wirelessly transmits it via the antenna A1.
　図８は、無線伝送装置４，５間で送受信される無線信号のフレーム形式を示す図である。図８を参照すると、無線信号には、ＩＱデータの送受信が行われる領域の前にオーバーヘッド領域（ＯＶＨ領域）が設けられている。このＯＶＨ領域を用いて、ＩＱデータの圧縮率情報及び圧縮要求が送受信される。 FIG. 8 is a diagram showing a frame format of a radio signal transmitted and received between the radio transmission apparatuses 4 and 5. Referring to FIG. 8, the radio signal is provided with an overhead area (OVH area) before an area where IQ data is transmitted and received. Using this OVH area, compression rate information of IQ data and a compression request are transmitted and received.
　ここで、無線送信部４０３は、無線伝送路Ｌ１の通信品質（換言すると、ＩＱデータＤ１の圧縮率ＲＱ１）に応じた変調方式を用いて、ＯＶＨ多重部４０２によって多重化されたデータをマイクロ波ＭＷ１に変調する。 Here, the wireless transmission unit 403 uses the modulation method according to the communication quality of the wireless transmission path L1 (in other words, the compression rate RQ1 of the IQ data D1) to convert the data multiplexed by the OVH multiplexing unit 402 into the microwave. Modulate to MW1.
　例えば、無線伝送路Ｌ１の通信品質の劣化に伴って、ＩＱデータＤ１が高倍率の圧縮率で圧縮されている場合、無線送信部４０３は、高多値から低多値の変調方式に切り替えて圧縮後のＩＱデータＤ１をマイクロ波ＭＷ１に変調する。他方、無線伝送路Ｌ１の通信品質の向上に伴って、ＩＱデータＤ１が低倍率の圧縮率で圧縮されている場合、無線送信部４０３は、低多値から高多値の変調方式に切り替えて圧縮後のＩＱデータＤ１をマイクロ波ＭＷ１に変調する。 For example, when the IQ data D1 is compressed at a high-magnification compression rate as the communication quality of the wireless transmission line L1 deteriorates, the wireless transmission unit 403 switches from a high multivalue to a low multivalue modulation method. The compressed IQ data D1 is modulated into the microwave MW1. On the other hand, when the IQ data D1 is compressed with a low-magnification compression rate as the communication quality of the wireless transmission path L1 improves, the wireless transmission unit 403 switches from the low multi-value modulation method to the high multi-value modulation method. The compressed IQ data D1 is modulated into the microwave MW1.
　無線伝送装置５において、無線受信部５０１は、無線伝送装置４からアンテナＡ１を介して無線送信されたマイクロ波ＭＷ１を、アンテナＡ２を介して無線受信する。そして、無線受信部５０１は、無線受信したマイクロ波ＭＷ１をベースバンド信号に復調する。 In the wireless transmission device 5, the wireless reception unit 501 wirelessly receives the microwave MW1 wirelessly transmitted from the wireless transmission device 4 via the antenna A1 via the antenna A2. Then, the wireless reception unit 501 demodulates the wirelessly received microwave MW1 into a baseband signal.
　ＯＶＨ抽出部５０３は、無線受信部５０１によって復調されたベースバンド信号から、圧縮されたＩＱデータＤ１及びその圧縮率情報ＲＱ１と、ＩＱデータＤ２の圧縮率情報ＲＱ２と、を抽出する。ＣＰＲＩ信号送信部５０４は、圧縮されたＩＱデータＤ１及びその圧縮率情報ＲＱ１と、ＩＱデータＤ２の圧縮率情報ＲＱ２とを、ＣＰＲＩ規格を満たすように変換したうえで送信する。 The OVH extraction unit 503 extracts the compressed IQ data D1 and its compression rate information RQ1 and the compression rate information RQ2 of the IQ data D2 from the baseband signal demodulated by the radio reception unit 501. The CPRI signal transmission unit 504 converts the compressed IQ data D1 and its compression rate information RQ1 and the compression rate information RQ2 of the IQ data D2 so as to satisfy the CPRI standard and transmits the converted data.
　無線装置３において、ＣＰＲＩ信号受信部３０１は、無線伝送装置５のＣＰＲＩ信号送信部５０４から光ケーブルを介して供給されたＣＰＲＩ規格のＩＱデータＤ１（圧縮率情報ＲＱ１、ＲＱ２含む）を受信する。ＩＱデータ復号部３０２は、圧縮されたＩＱデータＤ１を圧縮率情報ＲＱ１に基づき復号する。無線送信部３０３は、ＩＱデータ復号部３０２によって復号されたＩＱデータＤ１を高周波信号ＲＦ１に変調する。この高周波信号ＲＦ１は、アンテナＡ３を介して外部に無線送信され、ユーザ端末によって受信される。 In the wireless device 3, the CPRI signal receiving unit 301 receives IQ data D1 (including compression rate information RQ1 and RQ2) of the CPRI standard supplied from the CPRI signal transmitting unit 504 of the wireless transmission device 5 via the optical cable. The IQ data decoding unit 302 decodes the compressed IQ data D1 based on the compression rate information RQ1. The wireless transmission unit 303 modulates the IQ data D1 decoded by the IQ data decoding unit 302 into a high frequency signal RF1. The high-frequency signal RF1 is wirelessly transmitted to the outside via the antenna A3 and received by the user terminal.
　続いて、基地局装置１の受信経路について説明する。
　無線装置３において、無線受信部３０４は、外部からアンテナＡ３を介して無線受信した高周波信号ＲＦ１をＩＱデータ（ベースバンド信号）Ｄ２に復調する。 Subsequently, the reception path of the base station apparatus 1 will be described.
In the wireless device 3, the wireless reception unit 304 demodulates the high frequency signal RF1 wirelessly received from the outside via the antenna A3 into IQ data (baseband signal) D2.
　ＩＱデータ圧縮部３０５は、無線伝送路Ｌ１の通信品質に応じた圧縮率（本例では、ＣＰＲＩ信号受信部３０１によって受信され、ベースバンド処理装置２側から要求された圧縮率情報ＲＱ２の圧縮率）ＲＱ２で、ＩＱデータＤ２を圧縮する。 The IQ data compression unit 305 is a compression rate according to the communication quality of the wireless transmission path L1 (in this example, the compression rate of the compression rate information RQ2 received by the CPRI signal reception unit 301 and requested from the baseband processing device 2 side) ) The IQ data D2 is compressed with RQ2.
　例えば、無線伝送路Ｌ１の通信品質が劣化した場合、ＩＱデータ圧縮部３０５は、低倍率から高倍率の圧縮率に切り替えてＩＱデータＤ２を圧縮する。他方、無線伝送路Ｌ１の通信品質が向上した場合、ＩＱデータ圧縮部３０５は、高倍率から低倍率の圧縮率に切り替えてＩＱデータＤ２を圧縮する。 For example, when the communication quality of the wireless transmission path L1 deteriorates, the IQ data compression unit 305 switches the compression rate from the low magnification to the high magnification and compresses the IQ data D2. On the other hand, when the communication quality of the wireless transmission path L1 is improved, the IQ data compression unit 305 switches the compression rate from high to low and compresses the IQ data D2.
　ＣＰＲＩ信号送信部３０６は、圧縮されたＩＱデータＤ２及びその圧縮率情報ＲＱ２を、ＣＰＲＩ規格を満たすように変換したうえで送信する。 The CPRI signal transmission unit 306 converts the compressed IQ data D2 and the compression rate information RQ2 so as to satisfy the CPRI standard and transmits the converted data.
　無線伝送装置５において、ＣＰＲＩ信号受信部５０５は、無線装置３のＣＰＲＩ信号送信部３０６から光ケーブルを介して供給されたＣＰＲＩ規格のＩＱデータＤ２（圧縮率情報ＲＱ２含む）を受信する。 In the wireless transmission device 5, the CPRI signal reception unit 505 receives the CPRI standard IQ data D2 (including the compression rate information RQ2) supplied from the CPRI signal transmission unit 306 of the wireless device 3 via the optical cable.
　要求圧縮率決定部５０２は、無線伝送路Ｌ１の通信品質を表す指標の一つである、無線受信部５０１によって無線受信されたマイクロ波ＭＷ１のＣＮ雑音比、に基づいて、ベースバンド処理装置２側においてマイクロ波ＭＷ１に変調される前のＩＱデータＤ１の圧縮率を決定し、新たな圧縮率情報ＲＱ１として出力する。 The required compression rate determination unit 502 is based on the CN noise ratio of the microwave MW1 wirelessly received by the wireless reception unit 501, which is one of the indexes representing the communication quality of the wireless transmission path L1. On the side, the compression rate of the IQ data D1 before being modulated to the microwave MW1 is determined and output as new compression rate information RQ1.
　例えば、無線伝送路Ｌ１の通信品質が劣化してマイクロ波ＭＷ１のＣＮ雑音比が小さくなった場合、要求圧縮率決定部５０２は、ベースバンド処理装置２側から新たに送信されるＩＱデータＤ１に対する圧縮率を大きくする。他方、無線伝送路Ｌ１の通信品質が向上してマイクロ波ＭＷ１のＣＮ雑音比が小さくなった場合、要求圧縮率決定部５０２は、ベースバンド処理装置２側から新たに送信されるＩＱデータＤ１に対する圧縮率を小さくする。 For example, when the communication quality of the wireless transmission path L1 deteriorates and the CN noise ratio of the microwave MW1 becomes small, the required compression rate determination unit 502 performs processing for IQ data D1 newly transmitted from the baseband processing device 2 side. Increase the compression ratio. On the other hand, when the communication quality of the wireless transmission path L1 is improved and the CN noise ratio of the microwave MW1 is reduced, the requested compression rate determination unit 502 performs the processing for the IQ data D1 newly transmitted from the baseband processing device 2 side. Reduce the compression rate.
　ＯＶＨ多重部５０６は、圧縮されたＩＱデータＤ２（圧縮率情報ＲＱ２含む）と、ＩＱデータＤ１に対する新たな圧縮率情報ＲＱ１と、を多重化する。 The OVH multiplexing unit 506 multiplexes the compressed IQ data D2 (including the compression rate information RQ2) and the new compression rate information RQ1 for the IQ data D1.
　無線送信部５０７は、ＯＶＨ多重部５０６によって多重化されたデータ（ベースバンド信号）をマイクロ波ＭＷ２に変調して、アンテナＡ２を介して無線送信する。 The wireless transmission unit 507 modulates the data (baseband signal) multiplexed by the OVH multiplexing unit 506 into the microwave MW2 and wirelessly transmits it via the antenna A2.
　ここで、無線送信部５０７は、無線伝送路Ｌ１の通信品質（換言すると、ＩＱデータＤ２の圧縮率ＤＱ２）に応じた変調方式を用いて、ＯＶＨ多重部５０６によって多重化されたデータをマイクロ波ＭＷ２に変調する。 Here, the wireless transmission unit 507 uses the modulation scheme corresponding to the communication quality of the wireless transmission path L1 (in other words, the compression rate DQ2 of the IQ data D2) to microwave the data multiplexed by the OVH multiplexing unit 506. Modulate to MW2.
　例えば、無線伝送路Ｌ１の通信品質の劣化に伴って、ＩＱデータＤ２が高倍率の圧縮率で圧縮されている場合、無線送信部５０７は、高多値から低多値の変調方式に切り替えて圧縮後のＩＱデータＤ２をマイクロ波ＭＷ２に変調する。他方、無線伝送路Ｌ１の通信品質の向上に伴って、ＩＱデータＤ２が低倍率の圧縮率で圧縮されている場合、無線送信部５０７は、低多値から高多値の変調方式に切り替えて圧縮後のＩＱデータＤ２をマイクロ波ＭＷ２に変調する。 For example, when the IQ data D2 is compressed at a high-magnification compression rate as the communication quality of the wireless transmission line L1 deteriorates, the wireless transmission unit 507 switches from a high-multilevel modulation scheme to a low-multilevel modulation scheme. The compressed IQ data D2 is modulated into the microwave MW2. On the other hand, when the IQ data D2 is compressed with a low-magnification compression rate as the communication quality of the wireless transmission path L1 improves, the wireless transmission unit 507 switches from a low multi-value modulation method to a high multi-value modulation method. The compressed IQ data D2 is modulated into the microwave MW2.
　無線伝送装置４において、無線受信部４０４は、無線伝送装置５からアンテナＡ２を介して無線送信されたマイクロ波ＭＷ２を、アンテナＡ１を介して無線受信する。そして、無線受信部４０４は、無線受信したマイクロ波ＭＷ１をベースバンド信号に復調する。 In the wireless transmission device 4, the wireless reception unit 404 wirelessly receives the microwave MW2 wirelessly transmitted from the wireless transmission device 5 via the antenna A2 via the antenna A1. The wireless reception unit 404 demodulates the wirelessly received microwave MW1 into a baseband signal.
　ＯＶＨ抽出部４０６は、無線受信部４０４によって復調されたベースバンド信号から、圧縮されたＩＱデータＤ２及びその圧縮率情報ＲＱ２と、ＩＱデータＤ１の圧縮率情報ＲＱ１と、を抽出する。ＣＰＲＩ信号送信部４０７は、圧縮されたＩＱデータＤ２及びその圧縮率情報ＲＱ２と、ＩＱデータＤ１の圧縮率情報ＲＱ１とを、ＣＰＲＩ規格を満たすように変換したうえで送信する。 The OVH extraction unit 406 extracts the compressed IQ data D2 and its compression rate information RQ2 and the compression rate information RQ1 of the IQ data D1 from the baseband signal demodulated by the radio reception unit 404. The CPRI signal transmission unit 407 converts the compressed IQ data D2 and its compression rate information RQ2 and the compression rate information RQ1 of the IQ data D1 after converting them so as to satisfy the CPRI standard.
　ベースバンド処理装置２において、ＣＰＲＩ信号受信部２０３は、無線伝送装置４のＣＰＲＩ信号送信部４０７から光ケーブルを介して供給されたＣＰＲＩ規格のＩＱデータＤ２（圧縮率情報ＲＱ１，ＲＱ２含む）を受信する。ＩＱデータ復号部２０４は、圧縮されたＩＱデータＤ２を圧縮率情報ＲＱ２に基づき復号する。ベースバンド信号生成部２００は、ＩＱデータ復号部２０４によって復号されたＩＱデータＤ２に基づいて所定の処理を実行する。例えば、ベースバンド処理装置２は、その処理結果を上位装置（不図示）に対して出力する。 In the baseband processing device 2, the CPRI signal receiving unit 203 receives the CPRI standard IQ data D2 (including compression rate information RQ1 and RQ2) supplied from the CPRI signal transmitting unit 407 of the wireless transmission device 4 via the optical cable. . The IQ data decoding unit 204 decodes the compressed IQ data D2 based on the compression rate information RQ2. The baseband signal generation unit 200 performs a predetermined process based on the IQ data D2 decoded by the IQ data decoding unit 204. For example, the baseband processing device 2 outputs the processing result to a higher-level device (not shown).
　図５及び図６に示される基地局装置１の具体的構成は一例にすぎず、同等の機能を有する他の構成に適宜変更可能である。 The specific configuration of the base station apparatus 1 shown in FIGS. 5 and 6 is merely an example, and can be appropriately changed to another configuration having an equivalent function.
　本実施の形態では、無線伝送路Ｌ１の通信品質を表す指標の一つとして、マイクロ波ＭＷ１，ＭＷ２のＣＮ雑音比が用いられた場合を例に説明したが、これに限られず、マイクロ波ＭＷ１，ＭＷ２の電界強度が用いられてもよい。これは、以下に説明する実施の形態３，４においても同様のことが言える。 In the present embodiment, the case where the CN noise ratio of the microwaves MW1 and MW2 is used as one of the indexes indicating the communication quality of the wireless transmission path L1 has been described as an example. However, the present invention is not limited to this, and the microwave MW1 , MW2 field strength may be used. The same can be said for the third and fourth embodiments described below.
（基地局装置１の第１変形例）
　続いて、基地局装置１の第１変形例について説明する。
　図９は、基地局装置１の第１変形例を基地局装置１ａとして示すブロック図である。 (First modification of base station apparatus 1)
Then, the 1st modification of the base station apparatus 1 is demonstrated.
FIG. 9 is a block diagram illustrating a first modification of the base station device 1 as the base station device 1a.
　図９に示すように、基地局装置１ａは、ベースバンド処理装置（ＢＢＵ）２ａと、無線装置（ＲＲＨ）３ａと、無線伝送装置４ａ，５ａと、を備える。なお、基地局装置１ａにおけるベースバンド処理装置２ａ、無線装置３ａ、無線伝送装置４ａ，５ａは、それぞれ、基地局装置１におけるベースバンド処理装置２、無線装置３、無線伝送装置４，５に対応する。 As shown in FIG. 9, the base station apparatus 1a includes a baseband processing apparatus (BBU) 2a, a radio apparatus (RRH) 3a, and radio transmission apparatuses 4a and 5a. Note that the baseband processing device 2a, the wireless device 3a, and the wireless transmission devices 4a and 5a in the base station device 1a correspond to the baseband processing device 2, the wireless device 3, and the wireless transmission devices 4 and 5 in the base station device 1, respectively. To do.
　ここで、ベースバンド処理装置２ａ及び無線伝送装置４ａ間のデータの受け渡し、及び無線伝送装置５ａ及び無線装置３ａ間のデータの受け渡しに、ＣＰＲＩ規格の信号（ＣＰＲＩ信号）に代えて、イーサネット（登録商標）規格の信号（以下、ＥＴＨ信号とも称す）が用いられる。 Here, instead of the CPRI standard signal (CPRI signal), data is exchanged between the baseband processing device 2a and the wireless transmission device 4a and between the wireless transmission device 5a and the wireless device 3a. Trademark) standard signals (hereinafter also referred to as ETH signals) are used.
（基地局装置１ａの具体的構成例）
　図１０は、ベースバンド処理装置２ａ及び無線伝送装置４ａの具体的構成例を示すブロック図である。図１１は、無線装置３ａ及び無線伝送装置５ａの具体的構成例を示すブロック図である。 (Specific configuration example of base station apparatus 1a)
FIG. 10 is a block diagram illustrating a specific configuration example of the baseband processing device 2a and the wireless transmission device 4a. FIG. 11 is a block diagram illustrating a specific configuration example of the wireless device 3a and the wireless transmission device 5a.
　ベースバンド処理装置２ａは、ベースバンド処理装置２と比較して、ＣＰＲＩ信号送信部２０２及びＣＰＲＩ信号受信部２０３に代えて、ＥＴＨ信号送信部２０５、圧縮率情報パケット生成部２０６、及び、ＥＴＨ信号受信部２０７を備える。 Compared with the baseband processing device 2, the baseband processing device 2a replaces the CPRI signal transmission unit 202 and the CPRI signal reception unit 203 with an ETH signal transmission unit 205, a compression rate information packet generation unit 206, and an ETH signal. A receiving unit 207 is provided.
　無線伝送装置４ａは、無線伝送装置４と比較して、ＣＰＲＩ信号受信部４０１及びＣＰＲＩ信号送信部４０７に代えて、ＥＴＨ信号受信部４０８、ＥＴＨ信号送信部４０９、及び、圧縮率情報パケット生成部４１０を備える。 Compared with the wireless transmission device 4, the wireless transmission device 4a replaces the CPRI signal reception unit 401 and the CPRI signal transmission unit 407 with an ETH signal reception unit 408, an ETH signal transmission unit 409, and a compression rate information packet generation unit. 410.
　無線伝送装置５ａは、無線伝送装置５と比較して、ＣＰＲＩ信号送信部５０４及びＣＰＲＩ信号受信部５０５に代えて、ＥＴＨ信号送信部５０８、圧縮率情報パケット生成部５０９、及び、ＥＴＨ信号受信部５１０を備える。 Compared with the wireless transmission device 5, the wireless transmission device 5a replaces the CPRI signal transmission unit 504 and the CPRI signal reception unit 505 with an ETH signal transmission unit 508, a compression rate information packet generation unit 509, and an ETH signal reception unit. 510.
　無線装置３ａは、無線装置３と比較して、ＣＰＲＩ信号受信部３０１及びＣＰＲＩ信号送信部３０６に代えて、ＥＴＨ信号受信部３０７、圧縮率情報パケット抽出部３０８、ＥＴＨ信号送信部３０９、及び、圧縮率情報パケット生成部３１０を備える。 Compared with the wireless device 3, the wireless device 3a replaces the CPRI signal receiving unit 301 and the CPRI signal transmitting unit 306 with an ETH signal receiving unit 307, a compression rate information packet extracting unit 308, an ETH signal transmitting unit 309, and A compression rate information packet generator 310 is provided.
　まず、基地局装置１ａの送信経路について説明する。
　以下では、主に基地局装置１と異なる点について説明する。 First, the transmission path of the base station apparatus 1a will be described.
Below, a different point from the base station apparatus 1 is mainly demonstrated.
　ベースバンド処理装置２ａにおいて、圧縮率情報パケット生成部２０６は、ＩＱデータ圧縮部２０１によって圧縮されたＩＱデータＤ１の圧縮率情報ＲＱ１をイーサネット規格のパケットに変換する。ＥＴＨ信号送信部２０５は、ＩＱデータ圧縮部２０１によって圧縮されたＩＱデータＤ１をイーサネット規格のパケットに変換して一定間隔で送信するとともに、ＩＱデータＤ１のパケットを送信していない区間において、圧縮率情報ＲＱ１及び圧縮要求のパケットを送信する。 In the baseband processing device 2a, the compression rate information packet generation unit 206 converts the compression rate information RQ1 of the IQ data D1 compressed by the IQ data compression unit 201 into an Ethernet standard packet. The ETH signal transmission unit 205 converts the IQ data D1 compressed by the IQ data compression unit 201 into an Ethernet standard packet and transmits the packet at a constant interval, and in a section where the packet of the IQ data D1 is not transmitted, Information RQ1 and a compression request packet are transmitted.
　図１２は、基地局装置１ａにおいて採用されているイーサネット規格の信号の構成例を示す図である。図１２を参照すると、圧縮されたＩＱデータのパケットが周期Ｔかつパケット長Ｌ（Ｌ＜Ｔ）で送受信されている。それにより、連続データであるＩＱデータの送受信が可能となる。そして、圧縮されたＩＱデータのパケットが送受信されていない区間において、圧縮率情報及び圧縮要求のパケットが送受信されている。 FIG. 12 is a diagram illustrating a configuration example of a signal of the Ethernet standard adopted in the base station apparatus 1a. Referring to FIG. 12, packets of compressed IQ data are transmitted and received with a period T and a packet length L (L <T). Thereby, it is possible to transmit and receive IQ data which is continuous data. The compression rate information and the compression request packet are transmitted and received in a section where the compressed IQ data packet is not transmitted and received.
　無線伝送装置４ａにおいて、ＥＴＨ信号受信部４０８は、ベースバンド処理装置２ａのＥＴＨ信号送信部２０５から送信されたイーサネット規格のＩＱデータＤ１及び圧縮率情報ＲＱ１のそれぞれのパケットを受信する。ＥＴＨ信号受信部４０８の受信結果は、ＯＶＨ多重部４０２に供給される。 In the wireless transmission device 4a, the ETH signal reception unit 408 receives the packets of the Ethernet standard IQ data D1 and the compression rate information RQ1 transmitted from the ETH signal transmission unit 205 of the baseband processing device 2a. The reception result of the ETH signal receiving unit 408 is supplied to the OVH multiplexing unit 402.
　無線伝送装置５ａにおいて、圧縮率情報パケット生成部５０９は、ＯＶＨ抽出部５０３によって抽出された圧縮後のＩＱデータＤ１の圧縮率情報ＲＱ１、及び、ＩＱデータＤ２に対する圧縮率情報ＲＱ２をイーサネット規格のパケットに変換する。ＥＴＨ信号送信部５０８は、ＯＶＨ抽出部５０３によって抽出された圧縮後のＩＱデータＤ１をイーサネット規格のパケットに変換して一定間隔で送信するとともに、ＩＱデータＤ１のパケットを送信していない区間において、圧縮率情報ＲＱ１，ＲＱ２及び圧縮要求のパケットを送信する。 In the wireless transmission device 5a, the compression rate information packet generation unit 509 converts the compression rate information RQ1 of the compressed IQ data D1 extracted by the OVH extraction unit 503 and the compression rate information RQ2 for the IQ data D2 into the Ethernet standard packet. Convert to The ETH signal transmission unit 508 converts the compressed IQ data D1 extracted by the OVH extraction unit 503 into an Ethernet standard packet and transmits it at a constant interval, and in a section where the IQ data D1 packet is not transmitted, The compression rate information RQ1, RQ2 and a compression request packet are transmitted.
　無線装置３ａにおいて、ＥＴＨ信号受信部３０７は、無線伝送装置５ａのＥＴＨ信号送信部５０８から送信されたイーサネット規格のＩＱデータＤ１（圧縮率情報ＲＱ１、ＲＱ２含む）のパケットを受信する。ＥＴＨ信号受信部３０７により受信されたＩＱデータＤ１及びその圧縮率情報ＲＱ１は、後段に設けられたＩＱデータ復号部３０２に供給される。圧縮率情報パケット抽出部３０８は、ＥＴＨ信号受信部３０７により受信されたデータパケットの中から、ＩＱデータＤ２に対する圧縮率情報ＲＱ２のパケットを抽出する。圧縮率情報パケット抽出部３０８により抽出された圧縮率情報ＲＱ２は、受信経路上に設けられたＩＱデータ圧縮部３０５に供給される。 In the wireless device 3a, the ETH signal receiving unit 307 receives the packet of the Ethernet standard IQ data D1 (including compression rate information RQ1 and RQ2) transmitted from the ETH signal transmitting unit 508 of the wireless transmission device 5a. The IQ data D1 received by the ETH signal receiving unit 307 and the compression rate information RQ1 are supplied to the IQ data decoding unit 302 provided in the subsequent stage. The compression rate information packet extraction unit 308 extracts the packet of the compression rate information RQ2 for the IQ data D2 from the data packets received by the ETH signal reception unit 307. The compression rate information RQ2 extracted by the compression rate information packet extraction unit 308 is supplied to the IQ data compression unit 305 provided on the reception path.
　基地局装置１ａの送信経路のその他の構成及び動作については、基地局装置１の場合と同様であるため、その説明を省略する。 Since other configurations and operations of the transmission path of the base station apparatus 1a are the same as those of the base station apparatus 1, description thereof is omitted.
　続いて、基地局装置１ａの受信経路について説明する。
　以下では、主に基地局装置１と異なる点について説明する。 Next, the reception path of the base station device 1a will be described.
Below, a different point from the base station apparatus 1 is mainly demonstrated.
　無線装置３ａにおいて、圧縮率情報パケット生成部３１０は、ＩＱデータ圧縮部３０５によって圧縮されたＩＱデータＤ２の圧縮率情報ＲＱ２をイーサネット規格のパケットに変換する。ＥＴＨ信号送信部３０９は、ＩＱデータ圧縮部３０５によって圧縮されたＩＱデータＤ２をイーサネット規格のパケットに変換して一定間隔で送信するとともに、ＩＱデータＤ２のパケットを送信していない区間において、圧縮率情報ＲＱ２及び圧縮要求のパケットを送信する。 In the wireless device 3a, the compression rate information packet generation unit 310 converts the compression rate information RQ2 of the IQ data D2 compressed by the IQ data compression unit 305 into an Ethernet standard packet. The ETH signal transmission unit 309 converts the IQ data D2 compressed by the IQ data compression unit 305 into an Ethernet standard packet and transmits the packet at a constant interval, and in a section where the IQ data D2 packet is not transmitted, Information RQ2 and a compression request packet are transmitted.
　無線伝送装置５ａにおいて、ＥＴＨ信号受信部５１０は、ＥＴＨ信号送信部３０９から送信されたイーサネット規格のＩＱデータＤ２及び圧縮率情報ＲＱ２のそれぞれのパケットを受信する。ＥＴＨ信号受信部５１０の受信結果は、ＯＶＨ多重部５０６に供給される。 In the wireless transmission device 5a, the ETH signal reception unit 510 receives the packets of the Ethernet standard IQ data D2 and the compression rate information RQ2 transmitted from the ETH signal transmission unit 309. The reception result of the ETH signal receiving unit 510 is supplied to the OVH multiplexing unit 506.
　無線伝送装置４ａにおいて、圧縮率情報パケット生成部４１０は、ＯＶＨ抽出部４０６によって抽出された圧縮後のＩＱデータＤ２の圧縮率情報ＲＱ２、及び、ＩＱデータＤ１に対する圧縮率情報ＲＱ１をイーサネット規格のパケットに変換する。ＥＴＨ信号送信部４０９は、ＯＶＨ抽出部４０６によって抽出された圧縮後のＩＱデータＤ２をイーサネット規格のパケットに変換して一定間隔で送信するとともに、ＩＱデータＤ２のパケットを送信していない区間において、圧縮率情報ＲＱ１，ＲＱ２及び圧縮要求のパケットを送信する。 In the wireless transmission device 4a, the compression rate information packet generation unit 410 converts the compression rate information RQ2 of the compressed IQ data D2 extracted by the OVH extraction unit 406 and the compression rate information RQ1 for the IQ data D1 into an Ethernet standard packet. Convert to The ETH signal transmission unit 409 converts the compressed IQ data D2 extracted by the OVH extraction unit 406 into an Ethernet standard packet and transmits it at a constant interval, and in a section in which the IQ data D2 packet is not transmitted, The compression rate information RQ1, RQ2 and a compression request packet are transmitted.
　ベースバンド処理装置２ａにおいて、ＥＴＨ信号受信部２０７は、無線伝送装置４ａのＥＴＨ信号送信部４０９から送信されたイーサネット規格のＩＱデータＤ２（圧縮率情報ＲＱ１，ＲＱ２含む）のパケットを受信する。ＥＴＨ信号受信部２０７により受信されたＩＱデータＤ２及びその圧縮率情報ＲＱ２は、後段に設けられたＩＱデータ復号部２０４に供給される。圧縮率情報パケット抽出部２０８は、ＥＴＨ信号受信部２０７により受信されたデータパケットの中から、ＩＱデータＤ１に対する圧縮率情報ＲＱ１のパケットを抽出する。圧縮率情報パケット抽出部２０８により抽出された圧縮率情報ＲＱ１は、送信経路上に設けられたＩＱデータ圧縮部２０１に供給される。 In the baseband processing device 2a, the ETH signal receiving unit 207 receives a packet of Ethernet standard IQ data D2 (including compression rate information RQ1, RQ2) transmitted from the ETH signal transmitting unit 409 of the wireless transmission device 4a. The IQ data D2 received by the ETH signal receiving unit 207 and its compression rate information RQ2 are supplied to the IQ data decoding unit 204 provided in the subsequent stage. The compression rate information packet extraction unit 208 extracts the packet of the compression rate information RQ1 for the IQ data D1 from the data packets received by the ETH signal reception unit 207. The compression rate information RQ1 extracted by the compression rate information packet extraction unit 208 is supplied to the IQ data compression unit 201 provided on the transmission path.
　基地局装置１ａの受信経路のその他の構成及び動作については、基地局装置１の場合と同様であるため、その説明を省略する。 Since other configurations and operations of the reception path of the base station apparatus 1a are the same as those of the base station apparatus 1, description thereof is omitted.
（基地局装置１の第２変形例）
　続いて、基地局装置１の第２変形例について説明する。
　基地局装置１の第２変形例としての基地局装置１ｂは、ベースバンド処理装置２ｂと、無線装置３ｂと、無線伝送装置４ｂ，５ｂと、を備える。なお、基地局装置１ｂにおけるベースバンド処理装置２ｂ、無線装置３ｂ、無線伝送装置４ｂ，５ｂは、それぞれ、基地局装置１におけるベースバンド処理装置２、無線装置３、無線伝送装置４，５に対応する。 (Second modification of base station apparatus 1)
Then, the 2nd modification of the base station apparatus 1 is demonstrated.
A base station device 1b as a second modification of the base station device 1 includes a baseband processing device 2b, a wireless device 3b, and wireless transmission devices 4b and 5b. Note that the baseband processing device 2b, the wireless device 3b, and the wireless transmission devices 4b and 5b in the base station device 1b correspond to the baseband processing device 2, the wireless device 3, and the wireless transmission devices 4 and 5 in the base station device 1, respectively. To do.
　基地局装置１ｂでは、基地局装置１ａの場合と同様に、ベースバンド処理装置２ｂ及び無線伝送装置４ｂ間のデータの受け渡し、及び、無線伝送装置５ｂ及び無線装置３ｂ間のデータの受け渡しに、イーサネット規格の信号が用いられる。 In the base station device 1b, as in the case of the base station device 1a, Ethernet is used for data transfer between the baseband processing device 2b and the radio transmission device 4b and data transfer between the radio transmission device 5b and the radio device 3b. Standard signals are used.
（基地局装置１ｂの具体的構成例）
　図１３は、ベースバンド処理装置２ｂ及び無線伝送装置４ｂの具体的構成例を示すブロック図である。図１４は、無線装置３ｂ及び無線伝送装置５ｂの具体的構成例を示すブロック図である。 (Specific configuration example of base station apparatus 1b)
FIG. 13 is a block diagram illustrating a specific configuration example of the baseband processing device 2b and the wireless transmission device 4b. FIG. 14 is a block diagram illustrating a specific configuration example of the wireless device 3b and the wireless transmission device 5b.
　ベースバンド処理装置２ｂは、ベースバンド処理装置２ａと比較して、圧縮率情報パケット生成部２０６及び圧縮率情報パケット抽出部２０８を備えていない代わりに、圧縮率情報抽出部２０９を備える。無線伝送装置４ｂは、無線伝送装置４ａと比較して、圧縮率情報パケット生成部４１０を備えていない。無線伝送装置５ｂは、無線伝送装置５ｂと比較して、圧縮率情報パケット生成部５０９を備えていない。無線装置３ｂは、無線伝送装置４ａと比較して、圧縮率情報パケット抽出部３０８及び圧縮率情報パケット生成部３１０を備えていない代わりに、圧縮率情報抽出部３１１を備える。 Compared with the baseband processing device 2a, the baseband processing device 2b includes a compression rate information extraction unit 209 instead of including the compression rate information packet generation unit 206 and the compression rate information packet extraction unit 208. The wireless transmission device 4b does not include the compression rate information packet generation unit 410 as compared with the wireless transmission device 4a. The wireless transmission device 5b does not include the compression rate information packet generation unit 509 as compared with the wireless transmission device 5b. Compared with the wireless transmission device 4a, the wireless device 3b includes a compression rate information extraction unit 311 instead of including the compression rate information packet extraction unit 308 and the compression rate information packet generation unit 310.
　まず、基地局装置１ｂの送信経路について説明する。
　ベースバンド処理装置２ａにおいて、ＥＴＨ信号送信部２０５は、ＩＱデータ圧縮部２０１によって圧縮されたＩＱデータＤ１及びその圧縮率情報ＲＱ１を、イーサネット規格の単体のパケットに変換して一定間隔で送信する。 First, the transmission path of the base station apparatus 1b will be described.
In the baseband processing device 2a, the ETH signal transmission unit 205 converts the IQ data D1 compressed by the IQ data compression unit 201 and the compression rate information RQ1 into a single packet of the Ethernet standard and transmits it at regular intervals.
　図１５は、基地局装置１ｂにおいて採用されているイーサネット規格の信号の構成例を示す図である。図１５を参照すると、圧縮されたＩＱデータに加えて、ＯＶＨ領域に格納された圧縮率情報及び圧縮要求が、単体のパケットとして一定間隔で送受信されている。 FIG. 15 is a diagram illustrating a configuration example of a signal of the Ethernet standard adopted in the base station apparatus 1b. Referring to FIG. 15, in addition to the compressed IQ data, the compression rate information and the compression request stored in the OVH area are transmitted and received as a single packet at regular intervals.
　無線伝送装置４ｂにおいて、ＥＴＨ信号受信部４０８は、無線伝送装置４ｂのＥＴＨ信号送信部２０５から送信されたイーサネット規格のＩＱデータＤ１及び圧縮率情報ＲＱ１のパケットを受信する。ＥＴＨ信号受信部４０８の受信結果は、ＯＶＨ多重部４０２に供給される。 In the wireless transmission device 4b, the ETH signal reception unit 408 receives the packet of the Ethernet standard IQ data D1 and the compression rate information RQ1 transmitted from the ETH signal transmission unit 205 of the wireless transmission device 4b. The reception result of the ETH signal receiving unit 408 is supplied to the OVH multiplexing unit 402.
　無線伝送装置５ｂにおいて、ＥＴＨ信号送信部５０８は、ＯＶＨ抽出部５０３によって抽出された圧縮後のＩＱデータＤ１、その圧縮率情報ＲＱ１、及び、ＩＱデータＤ２に対する圧縮率情報ＲＱ２を、イーサネット規格の単体のパケットに変換して一定間隔で送信する。 In the wireless transmission device 5b, the ETH signal transmission unit 508 converts the compressed IQ data D1 extracted by the OVH extraction unit 503, the compression rate information RQ1, and the compression rate information RQ2 for the IQ data D2 into a single unit of the Ethernet standard. Are converted into packets and sent at regular intervals.
　無線装置３ｂにおいて、ＥＴＨ信号受信部３０７は、無線伝送装置５ｂのＥＴＨ信号送信部５０８から送信されたイーサネット規格のＩＱデータＤ１（圧縮率情報ＲＱ１，ＲＱ２含む）のパケットを受信する。ＥＴＨ信号受信部３０７により受信されたＩＱデータＤ１及びその圧縮率情報ＲＱ１は、後段に設けられたＩＱデータ復号部３０２に供給される。圧縮率情報抽出部３１１は、ＥＴＨ信号受信部３０７により受信されたデータパケットのＯＶＨ領域の中から、ＩＱデータＤ２に対する圧縮率情報ＲＱ２を抽出する。圧縮率情報抽出部３１１により抽出された圧縮率情報ＲＱ２は、受信経路上に設けられたＩＱデータ圧縮部３０５に供給される。 In the wireless device 3b, the ETH signal receiving unit 307 receives the packet of the Ethernet standard IQ data D1 (including compression rate information RQ1 and RQ2) transmitted from the ETH signal transmitting unit 508 of the wireless transmission device 5b. The IQ data D1 received by the ETH signal receiving unit 307 and the compression rate information RQ1 are supplied to the IQ data decoding unit 302 provided in the subsequent stage. The compression rate information extraction unit 311 extracts the compression rate information RQ2 for the IQ data D2 from the OVH region of the data packet received by the ETH signal reception unit 307. The compression rate information RQ2 extracted by the compression rate information extraction unit 311 is supplied to the IQ data compression unit 305 provided on the reception path.
　基地局装置１ｂの送信経路のその他の構成及び動作については、基地局装置１ａの場合と同様であるため、その説明を省略する。 Since other configurations and operations of the transmission path of the base station apparatus 1b are the same as those of the base station apparatus 1a, description thereof is omitted.
　続いて、基地局装置１ｂの受信経路について説明する。
　無線装置３ｂにおいて、ＥＴＨ信号送信部３０９は、ＩＱデータ圧縮部３０５によって圧縮されたＩＱデータＤ２及びその圧縮率情報ＲＱ２を、イーサネット規格の単体のパケットに変換して一定間隔で送信する。 Next, the reception path of the base station device 1b will be described.
In the wireless device 3b, the ETH signal transmission unit 309 converts the IQ data D2 compressed by the IQ data compression unit 305 and its compression rate information RQ2 into a single packet of the Ethernet standard and transmits the packet at regular intervals.
　無線伝送装置５ｂにおいて、ＥＴＨ信号受信部５１０は、無線装置３ｂのＥＴＨ信号送信部３０９から送信されたイーサネット規格のＩＱデータＤ２及び圧縮率情報ＲＱ２のパケットを受信する。ＥＴＨ信号受信部５１０の受信結果は、ＯＶＨ多重部５０６に供給される。 In the wireless transmission device 5b, the ETH signal reception unit 510 receives the Ethernet standard IQ data D2 and the compression rate information RQ2 packet transmitted from the ETH signal transmission unit 309 of the wireless device 3b. The reception result of the ETH signal receiving unit 510 is supplied to the OVH multiplexing unit 506.
　無線伝送装置４ｂにおいて、ＥＴＨ信号送信部４０９は、ＯＶＨ抽出部４０６によって抽出された圧縮後のＩＱデータＤ２、その圧縮率情報ＲＱ２、及び、ＩＱデータＤ１に対する圧縮率情報ＲＱ１を、イーサネット規格の単体のパケットに変換して一定間隔で送信する。 In the wireless transmission device 4b, the ETH signal transmission unit 409 converts the compressed IQ data D2 extracted by the OVH extraction unit 406, the compression rate information RQ2, and the compression rate information RQ1 for the IQ data D1 into a single unit of the Ethernet standard. Are converted into packets and sent at regular intervals.
　ベースバンド処理装置２ｂにおいて、ＥＴＨ信号受信部２０７は、無線伝送装置４ｂのＥＴＨ信号送信部４０９から送信されたイーサネット規格のＩＱデータＤ２（圧縮率情報ＲＱ１，ＲＱ２含む）のパケットを受信する。ＥＴＨ信号受信部２０７により受信されたＩＱデータＤ２及びその圧縮率情報ＲＱ２は、後段に設けられたＩＱデータ復号部２０４に供給される。圧縮率情報抽出部２０９は、ＥＴＨ信号受信部２０７により受信されたデータパケットのＯＶＨ領域の中から、ＩＱデータＤ１に対する圧縮率情報ＲＱ１を抽出する。圧縮率情報抽出部２０９により抽出された圧縮率情報ＲＱ１は、送信経路上に設けられたＩＱデータ圧縮部２０１に供給される。 In the baseband processing device 2b, the ETH signal receiving unit 207 receives a packet of Ethernet standard IQ data D2 (including compression rate information RQ1 and RQ2) transmitted from the ETH signal transmitting unit 409 of the wireless transmission device 4b. The IQ data D2 received by the ETH signal receiving unit 207 and its compression rate information RQ2 are supplied to the IQ data decoding unit 204 provided in the subsequent stage. The compression rate information extraction unit 209 extracts the compression rate information RQ1 for the IQ data D1 from the OVH area of the data packet received by the ETH signal reception unit 207. The compression rate information RQ1 extracted by the compression rate information extraction unit 209 is supplied to the IQ data compression unit 201 provided on the transmission path.
　基地局装置１ｂの受信経路のその他の構成及び動作については、基地局装置１ａの場合と同様であるため、その説明を省略する。 Since other configurations and operations of the reception path of the base station apparatus 1b are the same as those of the base station apparatus 1a, description thereof is omitted.
＜実施の形態３＞
　図１６は、実施の形態３にかかる基地局装置１ｃを示すブロック図である。基地局装置１ｃは、基地局装置１と比較して、ベースバンド処理装置２及び無線装置３間に２組の無線伝送装置を備える。以下、具体的に説明する。 <Embodiment 3>
FIG. 16 is a block diagram of the base station device 1c according to the third embodiment. The base station device 1 c includes two sets of wireless transmission devices between the baseband processing device 2 and the wireless device 3 as compared with the base station device 1. This will be specifically described below.
　図１６に示すように、基地局装置１ｃは、ベースバンド処理装置（ＢＢＵ）２と、無線装置（ＲＲＨ）３と、ベースバンド処理装置２と無線装置３との間のデータの受け渡しを無線で行うための無線伝送装置４１ｃ，４２ｃ及び無線伝送装置５１ｃ，５２ｃを備える。また、無線伝送装置４１ｃ，４２ｃにはアンテナＡ１１，Ａ１２がそれぞれ設けられ、無線伝送装置５１ｃ，５２ｃにはアンテナＡ２１，Ａ２２がそれぞれ設けられ、無線装置３にはアンテナＡ３が設けられている。即ち、基地局装置１ｃは、いわゆるＲＴＡ(Radio Traffic Aggregation)構成を有している。 As shown in FIG. 16, the base station device 1c wirelessly transfers data between the baseband processing device (BBU) 2, the wireless device (RRH) 3, and the baseband processing device 2 and the wireless device 3. Wireless transmission devices 41c and 42c and wireless transmission devices 51c and 52c for performing are provided. The wireless transmission devices 41c and 42c are provided with antennas A11 and A12, the wireless transmission devices 51c and 52c are provided with antennas A21 and A22, respectively, and the wireless device 3 is provided with an antenna A3. That is, the base station apparatus 1c has a so-called RTA (Radio Traffic Aggregation) configuration.
　なお、無線伝送装置４１ｃ，４２ｃの組み合わせが無線伝送装置４に対応し、無線伝送装置５１ｃ，５２ｃの組み合わせが無線伝送装置５に対応する。また、アンテナＡ１１，Ａ１２の組み合わせがアンテナＡ１に対応し、アンテナＡ２１，Ａ２２の組み合わせがアンテナＡ２に対応する。 A combination of the wireless transmission devices 41 c and 42 c corresponds to the wireless transmission device 4, and a combination of the wireless transmission devices 51 c and 52 c corresponds to the wireless transmission device 5. The combination of antennas A11 and A12 corresponds to antenna A1, and the combination of antennas A21 and A22 corresponds to antenna A2.
（無線伝送装置４１ｃ，４２ｃの第１の具体的構成例）
　図１７は、ベースバンド処理装置２側に設けられた無線伝送装置４１ｃ，４２ｃの第１の具体的構成例を示すブロック図である。 (First specific configuration example of the wireless transmission devices 41c and 42c)
FIG. 17 is a block diagram illustrating a first specific configuration example of the wireless transmission devices 41c and 42c provided on the baseband processing device 2 side.
　図１７に示すように、無線伝送装置４１ｃは、ＣＰＲＩ信号受信部４１１、ＣＰＲＩ信号振り分け部４１２、ＯＶＨ多重部４１４、無線送信部４１５、無線受信部４１６、要求圧縮率決定部４１７、ＯＶＨ抽出部４１８、ＣＰＲＩ信号組み立て部４２０及びＣＰＲＩ信号送信部４２１を備える。また、無線伝送装置４２ｃは、ＣＰＲＩ信号受信部４２２、ＯＶＨ多重部４２４、無線送信部４２５、無線受信部４２６、要求圧縮率決定部４２７、ＯＶＨ抽出部４２８及びＣＰＲＩ信号送信部４３０を備える。 As illustrated in FIG. 17, the wireless transmission device 41c includes a CPRI signal reception unit 411, a CPRI signal distribution unit 412, an OVH multiplexing unit 414, a wireless transmission unit 415, a wireless reception unit 416, a requested compression rate determination unit 417, and an OVH extraction unit. 418, a CPRI signal assembly unit 420 and a CPRI signal transmission unit 421 are provided. The wireless transmission device 42 c includes a CPRI signal reception unit 422, an OVH multiplexing unit 424, a wireless transmission unit 425, a wireless reception unit 426, a requested compression rate determination unit 427, an OVH extraction unit 428, and a CPRI signal transmission unit 430.
　なお、ＣＰＲＩ信号受信部４１１、ＯＶＨ多重部４１４、無線送信部４１５、無線受信部４１６、要求圧縮率決定部４１７、ＯＶＨ抽出部４１８及びＣＰＲＩ信号送信部４２１は、それぞれ、ＣＰＲＩ信号受信部４０１、ＯＶＨ多重部４０２、無線送信部４０３、無線受信部４０４、要求圧縮率決定部４０５、ＯＶＨ抽出部４０６及びＣＰＲＩ信号送信部４０７に対応する。また、ＣＰＲＩ信号受信部４２２、ＯＶＨ多重部４２４、無線送信部４２５、無線受信部４２６、要求圧縮率決定部４２７、ＯＶＨ抽出部４２８及びＣＰＲＩ信号送信部４３０は、それぞれ、ＣＰＲＩ信号受信部４０１、ＯＶＨ多重部４０２、無線送信部４０３、無線受信部４０４、要求圧縮率決定部４０５、ＯＶＨ抽出部４０６及びＣＰＲＩ信号送信部４０７に対応する。 Note that the CPRI signal reception unit 411, the OVH multiplexing unit 414, the wireless transmission unit 415, the wireless reception unit 416, the requested compression rate determination unit 417, the OVH extraction unit 418, and the CPRI signal transmission unit 421 are respectively a CPRI signal reception unit 401, This corresponds to the OVH multiplexing unit 402, the wireless transmission unit 403, the wireless reception unit 404, the requested compression rate determination unit 405, the OVH extraction unit 406, and the CPRI signal transmission unit 407. Further, the CPRI signal receiving unit 422, the OVH multiplexing unit 424, the wireless transmission unit 425, the wireless reception unit 426, the request compression rate determination unit 427, the OVH extraction unit 428, and the CPRI signal transmission unit 430 are respectively connected to the CPRI signal reception unit 401, This corresponds to the OVH multiplexing unit 402, the wireless transmission unit 403, the wireless reception unit 404, the requested compression rate determination unit 405, the OVH extraction unit 406, and the CPRI signal transmission unit 407.
　無線伝送装置４１ｃは、無線伝送装置４と比較して、ＣＰＲＩ信号振り分け部４１２及びＣＰＲＩ信号組み立て部４２０をさらに有する。無線伝送装置４１ｃのその他の構成は無線伝送装置４と同様である。無線伝送装置４２ｃは、無線伝送装置４と同様の構成を有する。 The wireless transmission device 41 c further includes a CPRI signal distribution unit 412 and a CPRI signal assembly unit 420 as compared with the wireless transmission device 4. Other configurations of the wireless transmission device 41 c are the same as those of the wireless transmission device 4. The wireless transmission device 42 c has the same configuration as the wireless transmission device 4.
　ＣＰＲＩ信号振り分け部４１２は、ＣＰＲＩ信号受信部４１１とＯＶＨ多重部４１４との間の送信経路上に設けられ、ＣＰＲＩ信号受信部４１１によって受信されたベースバンド処理装置２からのＣＰＲＩ信号を２つに分割する（振り分ける）。したがって、ＣＰＲＩ信号振り分け部４１２によって振り分けられた信号の一方は、無線伝送装置４１ｃ，５１ｃ間の無線伝送路Ｌ１１を介して無線伝送されるとともに、ＣＰＲＩ信号振り分け部４１２によって振り分けられた信号の他方は、無線伝送装置４２ｃ，５２ｃ間の無線伝送路Ｌ１２を介して無線伝送される。 The CPRI signal distribution unit 412 is provided on a transmission path between the CPRI signal reception unit 411 and the OVH multiplexing unit 414, and two CPRI signals from the baseband processing device 2 received by the CPRI signal reception unit 411 are provided. Divide (sort). Therefore, one of the signals distributed by the CPRI signal distribution unit 412 is wirelessly transmitted via the wireless transmission path L11 between the wireless transmission devices 41c and 51c, and the other of the signals distributed by the CPRI signal distribution unit 412 is The wireless transmission is performed via the wireless transmission path L12 between the wireless transmission devices 42c and 52c.
　ＣＰＲＩ信号組み立て部４２０は、ＯＶＨ抽出部４１８とＣＰＲＩ信号送信部４２１との間の受信経路上に設けられ、ＯＶＨ抽出部４１８，４２８のそれぞれの抽出結果を合成してＣＰＲＩ信号送信部４２１に出力する。 The CPRI signal assembling unit 420 is provided on the reception path between the OVH extraction unit 418 and the CPRI signal transmission unit 421, and combines the extraction results of the OVH extraction units 418 and 428 and outputs the result to the CPRI signal transmission unit 421. To do.
　より具体的には、ＯＶＨ抽出部４１８は、圧縮後のＩＱデータＤ２１（無線伝送路Ｌ１１を介して無線受信されたデータ）及びその圧縮率情報ＲＱ２１と、ＩＱデータＤ１１（無線伝送路Ｌ１１を介して無線送信する予定のデータ）に対する圧縮率情報ＲＱ１１と、を抽出する。ＯＶＨ抽出部４２８は、圧縮後のＩＱデータＤ２２（無線伝送路Ｌ１２を介して無線受信されたデータ）及びその圧縮率情報ＲＱ２２と、ＩＱデータＤ１２（無線伝送路Ｌ１２を介して無線受信する予定のデータ）に対する圧縮率情報ＲＱ１２と、を抽出する。そして、ＣＰＲＩ信号組み立て部４２０は、ＯＶＨ抽出部４１８，４２８のそれぞれの抽出結果を合成して、圧縮後のＩＱデータＤ２及びその圧縮率情報ＲＱ２並びにＩＱデータＤ１に対する圧縮率情報ＲＱ１として出力する。 More specifically, the OVH extraction unit 418 includes the compressed IQ data D21 (data wirelessly received via the wireless transmission path L11) and its compression rate information RQ21, and the IQ data D11 (through the wireless transmission path L11). And compression rate information RQ11 for the data scheduled to be wirelessly transmitted). The OVH extraction unit 428 includes the compressed IQ data D22 (data wirelessly received via the wireless transmission line L12) and its compression rate information RQ22, and the IQ data D12 (wirelessly received via the wireless transmission line L12). Compression rate information RQ12 for (data). Then, the CPRI signal assembling unit 420 combines the extraction results of the OVH extraction units 418 and 428 and outputs the compressed IQ data D2, its compression rate information RQ2, and the compression rate information RQ1 for the IQ data D1.
　無線伝送装置４１ｃ，４２ｃのその他の構成及び動作については、何れも無線伝送装置４と同様であるためその説明を省略する。また、無線伝送装置５１ｃ，５２ｃの構成及び動作については、送信経路上にＣＰＲＩ信号振り分け部が設けられ、受信経路上にＣＰＲＩ信号組み立て部が設けられる以外は、何れも無線伝送装置５と同様であるため、その説明を省略する。 Since the other configurations and operations of the wireless transmission devices 41c and 42c are the same as those of the wireless transmission device 4, description thereof will be omitted. The configurations and operations of the wireless transmission devices 51c and 52c are the same as those of the wireless transmission device 5 except that a CPRI signal distribution unit is provided on the transmission path and a CPRI signal assembly unit is provided on the reception path. Therefore, the description thereof is omitted.
　このように、基地局装置１ｃは、ＩＱデータを２つの信号成分に分割して、２組の無線伝送装置間に形成された２つの無線伝送路Ｌ１１，Ｌ１２を介して無線伝送を行うことにより、より確実な伝送レートでのＩＱデータの無線伝送を実現することができる。 As described above, the base station device 1c divides IQ data into two signal components and performs wireless transmission via the two wireless transmission paths L11 and L12 formed between the two sets of wireless transmission devices. Thus, wireless transmission of IQ data at a more reliable transmission rate can be realized.
　本実施の形態では、２組の無線伝送装置４１ｃ，５１ｃ及び無線伝送装置４２ｃ，５２ｃが設けられた場合を例に説明したが、これに限られず、当然ながら３組以上の無線伝送装置が設けられてもよい。 In this embodiment, the case where two sets of wireless transmission devices 41c and 51c and wireless transmission devices 42c and 52c are provided has been described as an example. However, the present invention is not limited to this, and naturally, three or more sets of wireless transmission devices are provided. May be.
　また、本実施の形態では、ベースバンド処理装置２及び無線装置３間のデータインタフェースにＣＰＲＩ規格が採用された場合を例に説明したが、これに限られず、例えばイーサネット規格が採用されてもよい。イーサネット規格が採用された場合の構成については、図９～図１２等の構成を参照すればよいため、その説明を省略する。 In the present embodiment, the case where the CPRI standard is adopted as the data interface between the baseband processing device 2 and the wireless device 3 has been described as an example. However, the present invention is not limited to this, and the Ethernet standard may be adopted, for example. . The configuration when the Ethernet standard is adopted may be referred to the configurations of FIGS. 9 to 12, and the description thereof is omitted.
（無線伝送装置４１ｃ，４２ｃの第２の具体的構成例）
　図１８は、無線伝送装置４１ｃ，４２ｃの第２の具体的構成例を無線伝送装置４１ｄ，４２ｄとして示すブロック図である。なお、無線伝送装置４１ｄ，４２ｄに加えて、ベースバンド処理装置２ｄ、無線装置３ｄ、及び、無線伝送装置５１ｄ，５２ｄにより、基地局装置１ｃに対応する基地局装置１ｄが構成される。 (Second specific configuration example of the wireless transmission devices 41c and 42c)
FIG. 18 is a block diagram illustrating a second specific configuration example of the wireless transmission devices 41c and 42c as the wireless transmission devices 41d and 42d. In addition to the wireless transmission devices 41d and 42d, the baseband processing device 2d, the wireless device 3d, and the wireless transmission devices 51d and 52d constitute a base station device 1d corresponding to the base station device 1c.
　基地局装置１ｄでは、ベースバンド処理装置２ｄがベースバンド処理装置２と比較してＩＱデータ圧縮部２０１及びＩＱデータ復号部２０４を有しない代わりに、無線伝送装置４１ｄが無線伝送装置４１ｃと比較してＣＰＲＩ信号圧縮部４１３及びＣＰＲＩ信号復元部４１９をさらに備え、無線伝送装置４２ｄが無線伝送装置４２ｃと比較してＣＰＲＩ信号圧縮部４２３及びＣＰＲＩ信号復元部４２９をさらに備える。 In the base station device 1d, the baseband processing device 2d does not have the IQ data compression unit 201 and the IQ data decoding unit 204 as compared with the baseband processing device 2, but the wireless transmission device 41d compares with the wireless transmission device 41c. The CPRI signal compression unit 413 and the CPRI signal restoration unit 419 are further provided, and the wireless transmission device 42d further includes the CPRI signal compression unit 423 and the CPRI signal restoration unit 429 as compared with the wireless transmission device 42c.
　具体的には、無線伝送装置４１ｄにおいて、ＣＰＲＩ信号圧縮部４１３は、ＣＰＲＩ信号受信部４１１及びＯＶＨ多重部４１４間の送信経路上に設けられる。そして、ＣＰＲＩ信号圧縮部４１３は、ＣＰＲＩ信号受信部４１１によって振り分けられたＣＰＲＩ信号の一方を、無線伝送路Ｌ１１の通信品質に応じた圧縮率（本例では、ＯＶＨ抽出部４１８によって抽出され、無線装置３側から要求された圧縮率情報ＲＱ１１の圧縮率）ＲＱ１１で圧縮する。 Specifically, in the wireless transmission device 41d, the CPRI signal compression unit 413 is provided on the transmission path between the CPRI signal reception unit 411 and the OVH multiplexing unit 414. Then, the CPRI signal compressing unit 413 extracts one of the CPRI signals distributed by the CPRI signal receiving unit 411 by the compression rate according to the communication quality of the wireless transmission path L11 (in this example, the OVH extracting unit 418 extracts the wireless (Compression rate of compression rate information RQ11 requested from the apparatus 3 side) RQ11 is used for compression.
　また、無線伝送装置４２ｄにおいて、ＣＰＲＩ信号圧縮部４２３は、ＣＰＲＩ信号受信部４２２及びＯＶＨ多重部４２４間の送信経路上に設けられる。そして、ＣＰＲＩ信号圧縮部４２３は、ＣＰＲＩ信号受信部４１１によって振り分けられたＣＰＲＩ信号の他方を、無線伝送路Ｌ１２の通信品質に応じた圧縮率（本例では、ＯＶＨ抽出部４２８によって抽出され、無線装置３側から要求された圧縮率情報ＲＱ１２の圧縮率）ＲＱ１２で圧縮する。 In the wireless transmission device 42d, the CPRI signal compression unit 423 is provided on the transmission path between the CPRI signal reception unit 422 and the OVH multiplexing unit 424. Then, the CPRI signal compression unit 423 extracts the other of the CPRI signals distributed by the CPRI signal reception unit 411 by the compression rate (in this example, the OVH extraction unit 428) according to the communication quality of the wireless transmission line L12, Compression is performed with the compression ratio RQ12 (compression ratio of the compression ratio information RQ12 requested from the apparatus 3 side).
　ここで、無線伝送装置４１ｃ，５１ｃ間の無線伝送路Ｌ１１を介して無線伝送されるＩＱデータの変調方式及び圧縮率と、無線伝送装置４２ｃ，５２ｃ間の無線伝送路Ｌ１２を介して無線伝送されるＩＱデータの変調方式及び圧縮率とは、それぞれ独立して設定可能である。 Here, the modulation method and compression rate of IQ data wirelessly transmitted via the wireless transmission path L11 between the wireless transmission apparatuses 41c and 51c, and the wireless transmission via the wireless transmission path L12 between the wireless transmission apparatuses 42c and 52c. The IQ data modulation method and compression rate can be set independently of each other.
　そこで、ＣＰＲＩ信号振り分け部４１２は、例えば、優先度の高いＣＰＲＩ信号成分を、高多値の変調方式を採用している無線伝送路側に振り分け、かつ、優先度の低いＣＰＲＩ信号成分を、低多値の変調方式を採用している無線伝送路側に振り分ける。それにより、優先度の高いＣＰＲＩ信号成分の高品質な無線伝送が可能になるとともに、優先度の低いＣＰＲＩ信号成分の品質は劣るがより確実な無線伝送が可能になる。 Therefore, for example, the CPRI signal distribution unit 412 distributes the CPRI signal component having a high priority to the radio transmission path side adopting the high-multilevel modulation method, and the CPRI signal component having a low priority is low The value is distributed to the wireless transmission line that uses the value modulation method. This enables high-quality wireless transmission of a CPRI signal component with a high priority, and more reliable wireless transmission with a poor quality of a CPRI signal component with a low priority.
　次に、無線伝送装置４１ｄにおいて、ＣＰＲＩ信号復元部４１９は、ＯＶＨ抽出部４１８及びＣＰＲＩ信号組み立て部４２０間の受信経路上に設けられ、ＯＶＨ抽出部４１８によって抽出された圧縮後のＩＱデータＤ２１を、同じくＯＶＨ抽出部４１８によって抽出された圧縮率情報ＲＱ２１を基に復元する。 Next, in the wireless transmission device 41d, the CPRI signal restoration unit 419 is provided on the reception path between the OVH extraction unit 418 and the CPRI signal assembly unit 420, and the compressed IQ data D21 extracted by the OVH extraction unit 418 is used. Similarly, restoration is performed based on the compression rate information RQ21 extracted by the OVH extraction unit 418.
　また、無線伝送装置４２ｄにおいて、ＣＰＲＩ信号復元部４２９は、ＯＶＨ抽出部４２８及びＣＰＲＩ信号送信部４３０間の受信経路上に設けられ、ＯＶＨ抽出部４２８によって抽出された圧縮後のＩＱデータＤ２２を、同じくＯＶＨ抽出部４２８によって抽出された圧縮率情報ＲＱ２２を基に復元する。 In the wireless transmission device 42d, the CPRI signal restoration unit 429 is provided on the reception path between the OVH extraction unit 428 and the CPRI signal transmission unit 430, and the compressed IQ data D22 extracted by the OVH extraction unit 428 is Similarly, restoration is performed based on the compression rate information RQ22 extracted by the OVH extraction unit 428.
　そして、ＣＰＲＩ信号組み立て部４２０は、ＣＰＲＩ信号復元部４１９により復元されたＩＱデータＤ２１、及び、ＣＰＲＩ信号復元部４２９により復元されたＩＱデータＤ２２を合成してＩＱデータＤ２として出力する。なお、ＣＰＲＩ信号組み立て部４２０は、ＩＱデータＤ１１，Ｄ１２に対する圧縮率情報ＲＱ１１，ＲＱ１２も合成する。 Then, the CPRI signal assembling unit 420 combines the IQ data D21 restored by the CPRI signal restoring unit 419 and the IQ data D22 restored by the CPRI signal restoring unit 429, and outputs the synthesized IQ data D2. The CPRI signal assembling unit 420 also synthesizes the compression rate information RQ11 and RQ12 for the IQ data D11 and D12.
　無線伝送装置４１ｄ，４２ｄのその他の構成及び動作については、無線伝送装置４１ｃ，４２ｃと同様であるためその説明を省略する。また、無線伝送装置５１ｄ，５２ｄの構成及び動作については、送信経路上にＣＰＲＩ信号圧縮部がそれぞれ設けられ、かつ、受信経路上にＣＰＲＩ信号復号部がそれぞれ設けられる以外は、無線伝送装置５１ｃ，５２ｃと同様であるためその説明を省略する。なお、それに伴って、無線装置３ｄは、ＩＱデータ圧縮部３０５及びＩＱデータ復号部３０２を備えていない。 Since the other configurations and operations of the wireless transmission devices 41d and 42d are the same as those of the wireless transmission devices 41c and 42c, description thereof is omitted. The configurations and operations of the wireless transmission devices 51d and 52d are the same as the wireless transmission devices 51c, 51c except that a CPRI signal compression unit is provided on the transmission path and a CPRI signal decoding unit is provided on the reception path. Since it is the same as 52c, its description is omitted. Accordingly, the wireless device 3d does not include the IQ data compression unit 305 and the IQ data decoding unit 302.
　このように、基地局装置１ｄは、基地局装置１ｃと同等の効果を奏することができるとともに、ＩＱデータを２つの信号成分に分割して、それぞれ異なる変調方式及び圧縮率で無線伝送を行うことができる。それにより、例えば、優先度の高いＣＰＲＩ信号成分の高品質な無線伝送を行うとともに、優先度の低いＣＰＲＩ信号成分の品質は劣るがより確実な無線伝送を行うことが可能となる。 As described above, the base station apparatus 1d can achieve the same effects as the base station apparatus 1c, and can divide IQ data into two signal components and perform wireless transmission with different modulation schemes and compression rates, respectively. Can do. Thereby, for example, high-quality wireless transmission of a high-priority CPRI signal component can be performed, and more reliable wireless transmission can be performed although the quality of a low-priority CPRI signal component is inferior.
（無線伝送装置４１ｃ，４２ｃの第３の具体的構成例）
　図１９は、無線伝送装置４１ｃ，４２ｃの第３の具体的構成例を無線伝送装置４１ｅ，４２ｅとして示すブロック図である。なお、無線伝送装置４１ｅ，４２ｅに加えて、ベースバンド処理装置２ｄ、無線装置３ｄ、及び、無線伝送装置５１ｅ，５２ｅにより、基地局装置１ｃに対応する基地局装置１ｅが構成される。 (Third specific configuration example of the wireless transmission devices 41c and 42c)
FIG. 19 is a block diagram illustrating a third specific configuration example of the wireless transmission devices 41c and 42c as the wireless transmission devices 41e and 42e. In addition to the wireless transmission devices 41e and 42e, the baseband processing device 2d, the wireless device 3d, and the wireless transmission devices 51e and 52e constitute a base station device 1e corresponding to the base station device 1c.
　基地局装置１ｅでは、ベースバンド処理装置２ｅがベースバンド処理装置２と比較してＩＱデータ圧縮部２０１及びＩＱデータ復号部２０４を有しない代わりに、無線伝送装置４１ｅが無線伝送装置４１ｃと比較してＣＰＲＩ信号圧縮部４１３及びＣＰＲＩ信号復元部４１９をさらに備える。なお、本例では、ＯＶＨ多重部４１４及びＣＰＲＩ信号受信部４１１の前後関係が逆になっており、ＣＰＲＩ信号組み立て部４２０及びＯＶＨ抽出部４１８の前後関係が逆になっている。また、無線伝送装置４２ｅは、無線伝送装置４２ｃと比較して、ＯＶＨ多重部４２４及びＯＶＨ抽出部４２８を有しない。 In the base station device 1e, the baseband processing device 2e does not have the IQ data compression unit 201 and the IQ data decoding unit 204 as compared with the baseband processing device 2, but the wireless transmission device 41e compares with the wireless transmission device 41c. The CPRI signal compression unit 413 and the CPRI signal restoration unit 419 are further provided. In this example, the context of the OVH multiplexing unit 414 and the CPRI signal receiving unit 411 is reversed, and the context of the CPRI signal assembling unit 420 and the OVH extraction unit 418 is reversed. Further, the wireless transmission device 42e does not include the OVH multiplexing unit 424 and the OVH extraction unit 428 as compared with the wireless transmission device 42c.
　図１９では、無線伝送装置４１ｅにのみ設けられたＣＰＲＩ信号圧縮部４１３によって、振り分け前のＣＰＲＩ信号に対する圧縮が行われ、無線伝送装置４１ｅにのみ設けられたＣＰＲＩ信号復元部４１９によって、合成後（組み立て後）のＣＰＲＩ信号に対する復元が行われる。 In FIG. 19, the CPRI signal compression unit 413 provided only in the wireless transmission device 41e compresses the CPRI signal before the distribution, and the CPRI signal restoration unit 419 provided only in the wireless transmission device 41e performs synthesis ( The CPRI signal after assembly is restored.
　無線伝送装置４１ｅ，４２ｅのその他の構成及び動作については、何れも無線伝送装置４と同様であるためその説明を省略する。また、無線伝送装置５１ｅ，５２ｅの構成及び動作については、無線伝送装置５１ｅの送信経路上にＣＰＲＩ信号振分け部が設けられ、無線伝送装置５１ｅの受信経路上にＣＰＲＩ信号組み立て部が設けられる以外は、基本的には何れも無線伝送装置５と同様であるため、その説明を省略する。 Since the other configurations and operations of the wireless transmission devices 41e and 42e are the same as those of the wireless transmission device 4, description thereof will be omitted. As for the configurations and operations of the wireless transmission devices 51e and 52e, the CPRI signal distribution unit is provided on the transmission path of the wireless transmission device 51e, and the CPRI signal assembly unit is provided on the reception path of the wireless transmission device 51e. Basically, both are the same as those of the wireless transmission device 5, and the description thereof is omitted.
　基地局装置１ｅは、基地局装置１ｃと同等の効果を奏することができる。 The base station device 1e can achieve the same effects as the base station device 1c.
＜実施の形態４＞
　図２０は、実施の形態４にかかる基地局装置（無線通信装置）１ｆを示すブロック図である。 <Embodiment 4>
FIG. 20 is a block diagram of a base station device (wireless communication device) 1f according to the fourth embodiment.
　図２０に示すように、基地局装置１ｆは、ベースバンド処理装置２ｆと、無線装置３ｆと、無線伝送装置４１ｆ，４２ｆと、無線伝送装置５１ｆ，５２ｆと、を備える。無線伝送装置４１ｆ，４２ｆにはアンテナＡ１１，Ａ１２がそれぞれ設けられ、無線伝送装置５１ｆ，５２ｆにはアンテナＡ２１，Ａ２２がそれぞれ設けられ、無線装置３ｆにはアンテナＡ３が設けられている。基地局装置１ｆは、いわゆるＬＡＧ(Link Aggregation)構成を有している。 As shown in FIG. 20, the base station device 1f includes a baseband processing device 2f, a wireless device 3f, wireless transmission devices 41f and 42f, and wireless transmission devices 51f and 52f. The wireless transmission devices 41f and 42f are provided with antennas A11 and A12, the wireless transmission devices 51f and 52f are provided with antennas A21 and A22, respectively, and the wireless device 3f is provided with an antenna A3. The base station device 1f has a so-called LAG (Link Aggregation) configuration.
（基地局装置１ｆの具体的構成例）
　図２１は、ベースバンド処理装置２ｆ及び無線伝送装置４１ｆ，４２ｆの具体的構成例を示すブロック図である。図２２は、無線装置３ｆ及び無線伝送装置５１ｆ，５２ｆの具体的構成例を示すブロック図である。 (Specific configuration example of base station apparatus 1f)
FIG. 21 is a block diagram illustrating a specific configuration example of the baseband processing device 2f and the wireless transmission devices 41f and 42f. FIG. 22 is a block diagram illustrating a specific configuration example of the wireless device 3f and the wireless transmission devices 51f and 52f.
　ベースバンド処理装置２ｆは、ベースバンド信号生成部２００ｆと、ＩＱデータ圧縮部２０１１，２０１２と、ＣＰＲＩ信号送信部２０２１，２０２２と、ＣＰＲＩ信号受信部２０３１，２０３２と、ＩＱデータ復号部２０４１，２０４２と、圧縮率情報等抽出部２１０１，２１０２と、を備える。ここで、ベースバンド処理装置２ｆは、ベースバンド信号生成部２００以外のベースバンド処理装置２の構成を２重に有する。 The baseband processing device 2f includes a baseband signal generation unit 200f, IQ data compression units 2011 and 2012, CPRI signal transmission units 2021 and 2022, CPRI signal reception units 2031 and 2032, IQ data decoding units 2041 and 2042, and , Compression rate information etc. extraction units 2101 and 2102. Here, the baseband processing device 2 f has a double configuration of the baseband processing device 2 other than the baseband signal generation unit 200.
　ベースバンド信号生成部２００ｆは、ＱｏＳ制御部２１１と、振り分けＯＶＨ多重部２３１，２３４と、ＩＱデータ生成部２１３，２２３と、ネットワーク（ＮＷ）データ生成部２２０，２３０と、を有する。 The baseband signal generation unit 200f includes a QoS control unit 211, a distribution OVH multiplexing unit 231, 234, an IQ data generation unit 213, 223, and a network (NW) data generation unit 220, 230.
　無線伝送装置４１ｆは、ＣＰＲＩ信号受信部４０１１、ＯＶＨ多重部４０２１、無線送信部４０３１、無線受信部４０４１、要求圧縮率決定部４０５１、ＯＶＨ抽出部４０６１及びＣＰＲＩ信号送信部４０７１を有する。無線伝送装置４２ｆは、ＣＰＲＩ信号受信部４０１２、ＯＶＨ多重部４０２２、無線送信部４０３２、無線受信部４０４２、要求圧縮率決定部４０５２、ＯＶＨ抽出部４０６２及びＣＰＲＩ信号送信部４０７２を有する。ここで、無線伝送装置４１ｆ，４２ｆは、何れも無線伝送装置４と同様の構成及び動作を示す。 The wireless transmission device 41f includes a CPRI signal reception unit 4011, an OVH multiplexing unit 4021, a wireless transmission unit 4031, a wireless reception unit 4041, a required compression rate determination unit 4051, an OVH extraction unit 4061, and a CPRI signal transmission unit 4071. The wireless transmission device 42f includes a CPRI signal reception unit 4012, an OVH multiplexing unit 4022, a wireless transmission unit 4032, a wireless reception unit 4042, a required compression rate determination unit 4052, an OVH extraction unit 4062, and a CPRI signal transmission unit 4072. Here, the wireless transmission devices 41 f and 42 f both have the same configuration and operation as the wireless transmission device 4.
　無線装置３ｆは、ＣＰＲＩ信号受信部３０１１，３０１２と、ＩＱデータ復号部３０２１，３０２２と、無線送信部３０３と、無線受信部３０４と、ＩＱデータ圧縮部３０５１，３０５２と、ＣＰＲＩ信号送信部３０６１，３０６２と、振り分けＯＶＨ抽出部３１２と、ＩＱデータ振り分け部３１３と、を有する。ここで、無線装置３ｆは、無線装置３の構成を２重に有する。ただし、無線送信部３０３及び無線受信部３０４は、何れも２重の構成によって共用されている。 The wireless device 3f includes a CPRI signal reception unit 3011 and 3012, an IQ data decoding unit 3021 and 3022, a wireless transmission unit 303, a wireless reception unit 304, an IQ data compression unit 3051 and 3052, and a CPRI signal transmission unit 3061. 3062, a distribution OVH extraction unit 312, and an IQ data distribution unit 313. Here, the wireless device 3 f has a double configuration of the wireless device 3. However, the wireless transmission unit 303 and the wireless reception unit 304 are both shared by a double configuration.
　無線伝送装置５１ｆは、無線受信部５０１１、要求圧縮率決定部５０２１、ＯＶＨ抽出部５０３１、ＣＰＲＩ信号送信部５０４１、ＣＰＲＩ信号受信部５０５１、ＯＶＨ多重部５０６１及び無線送信部５０７１を有する。無線伝送装置５２ｆは、無線受信部５０１２、要求圧縮率決定部５０２２、ＯＶＨ抽出部５０３２、ＣＰＲＩ信号送信部５０４２、ＣＰＲＩ信号受信部５０５２、ＯＶＨ多重部５０６２及び無線送信部５０７２を有する。ここで、無線伝送装置５１ｆ，５２ｆは、何れも無線伝送装置５と同様の構成及び動作を示す。 The wireless transmission device 51f includes a wireless reception unit 5011, a required compression rate determination unit 5021, an OVH extraction unit 5031, a CPRI signal transmission unit 5041, a CPRI signal reception unit 5051, an OVH multiplexing unit 5061, and a wireless transmission unit 5071. The wireless transmission device 52f includes a wireless reception unit 5012, a required compression rate determination unit 5022, an OVH extraction unit 5032, a CPRI signal transmission unit 5042, a CPRI signal reception unit 5052, an OVH multiplexing unit 5062, and a wireless transmission unit 5072. Here, the wireless transmission devices 51 f and 52 f both have the same configuration and operation as the wireless transmission device 5.
　まず、基地局装置１ｆの送信経路の動作について説明する。なお、基地局装置１ｆには、上述したように、既に説明した構成と同様の構成が多く含まれているため、簡略化して説明する。 First, the operation of the transmission path of the base station device 1f will be described. Since the base station apparatus 1f includes many configurations similar to those already described as described above, the description will be simplified.
　ベースバンド信号生成部２００ｆにおいて、ＱｏＳ制御部２１１は、ＩＱデータ圧縮部２０１１，２０１２，３０５１，３０５２の圧縮率情報Ｓ１１，Ｓ１２，Ｓ２１，Ｓ２２、及び、基地局装置１ｆに対向して設けられた図示しない別の基地局装置（以下、対向基地局装置と称す）から取得した圧縮率情報（Ｓ２１，Ｓ２２に含まれる情報）に基づいて、上位装置から供給されたネットワークデータを振り分ける。 In the baseband signal generation unit 200f, the QoS control unit 211 is provided to face the compression rate information S11, S12, S21, S22 of the IQ data compression units 2011, 2012, 3051, and 3052 and the base station device 1f. Based on the compression rate information (information included in S21 and S22) acquired from another base station device (hereinafter referred to as an opposite base station device) (not shown), the network data supplied from the host device is distributed.
　例えば、ＱｏＳ制御部２１１は、低い圧縮率が採用される送受信経路（換言すると、高多値の変調方式が採用される送受信経路）に対して優先度の高いネットワークデータを振り分け、高い圧縮率が採用される送受信経路（換言すると、低多値の変調方式が採用される送受信経路）に対して優先度の低いネットワークデータを振り分ける。 For example, the QoS control unit 211 distributes network data having a high priority to transmission / reception paths in which a low compression rate is adopted (in other words, transmission / reception paths in which a high-multilevel modulation method is adopted), and a high compression ratio is obtained. Network data having a low priority is allocated to a transmission / reception path to be employed (in other words, a transmission / reception path to which a low-value modulation scheme is employed).
　振り分けＯＶＨ多重部２３１，２３４は、それぞれＱｏＳ制御部２１１により振り分けられたネットワークデータと、そのデータに関する情報と、を多重化する。なお、データに関する情報は、データフレームのＯＶＨ領域に格納される。ここで、対向基地局装置に要求されているＱｏＳ制御情報もＯＶＨ領域に格納される。 The distribution OVH multiplexing units 231 and 234 multiplex the network data distributed by the QoS control unit 211 and information related to the data, respectively. Information about data is stored in the OVH area of the data frame. Here, the QoS control information required for the opposite base station apparatus is also stored in the OVH area.
　ＩＱデータ生成部２１３は、振り分けＯＶＨ多重部２３１から出力されたネットワークデータをＩＱデータＤ１１に変換して出力する。このＩＱデータＤ１１は、圧縮された後、ベースバンド処理装置２と同様の動作を経て、無線伝送装置４１ｆに供給される。無線伝送装置４１ｆは、圧縮後のＩＱデータＤ１１をマイクロ波ＭＷ１１に変調した後、アンテナＡ１１を介して無線送信する。無線伝送装置５１ｆは、アンテナＡ１２を介して無線受信したマイクロ波ＭＷ１１を圧縮されたＩＱデータＤ１１に復調し、無線装置３ｆに対して出力する。 The IQ data generation unit 213 converts the network data output from the distribution OVH multiplexing unit 231 into IQ data D11 and outputs the IQ data D11. The IQ data D11 is compressed, and then supplied to the wireless transmission device 41f through the same operation as the baseband processing device 2. The wireless transmission device 41f modulates the compressed IQ data D11 into the microwave MW11, and then wirelessly transmits it through the antenna A11. The wireless transmission device 51f demodulates the microwave MW11 wirelessly received via the antenna A12 into compressed IQ data D11 and outputs the compressed IQ data D11 to the wireless device 3f.
　ＩＱデータ生成部２２３は、振り分けＯＶＨ多重部２３４から出力されたネットワークデータをＩＱデータＤ１２に変換して出力する。このＩＱデータＤ１２は、圧縮された後、ベースバンド処理装置２と同様の動作を経て、無線伝送装置４２ｆに供給される。無線伝送装置４２ｆは、圧縮後のＩＱデータＤ１２をマイクロ波ＭＷ１２に変調した後、アンテナＡ１２を介して無線送信する。無線伝送装置５２ｆは、アンテナＡ２２を介して無線受信したマイクロ波ＭＷ１２を圧縮されたＩＱデータＤ１２に復調し、無線装置３ｆに対して出力する。 The IQ data generation unit 223 converts the network data output from the distribution OVH multiplexing unit 234 into IQ data D12 and outputs the IQ data D12. The IQ data D12 is compressed and then supplied to the wireless transmission device 42f through the same operation as that of the baseband processing device 2. The wireless transmission device 42f modulates the compressed IQ data D12 into the microwave MW12, and then wirelessly transmits the modulated data via the antenna A12. The wireless transmission device 52f demodulates the microwave MW12 received wirelessly via the antenna A22 into compressed IQ data D12 and outputs the compressed IQ data D12 to the wireless device 3f.
　無線装置３ｆは、圧縮されたＩＱデータＤ１１，Ｄ１２をそれぞれ復号し、合成してＩＱデータＤ１を再生する。再生されたＩＱデータＤ１は、アンテナＡ３を介して無線送信される。 The wireless device 3f decodes the compressed IQ data D11 and D12, combines them, and reproduces the IQ data D1. The reproduced IQ data D1 is wirelessly transmitted via the antenna A3.
　ここで、アンテナＡ３を介して無線送信される無線信号のＯＶＨ領域には、ＱｏＳ制御部２１１による対向基地局装置に対するＱｏＳ制御情報が含まれる。対向基地局装置では、このＱｏＳ制御情報に基づいて、無線受信したＩＱデータＤ１の振り分けが行われる。 Here, the OVH area of the radio signal wirelessly transmitted via the antenna A3 includes QoS control information for the opposite base station apparatus by the QoS control unit 211. In the opposite base station apparatus, the received IQ data D1 is distributed based on the QoS control information.
　続いて、基地局装置１ｆの受信経路の動作について説明する。
　無線装置３ｆにおいて、振り分けＯＶＨ抽出部３１２は、例えば、アンテナＡ３を介して無線受信した無線信号のＯＶＨ領域から、ＱｏＳ制御部２１１による自局に対するＱｏＳ制御情報を抽出する。ＩＱデータ振り分け部３１３は、自局に対するＱｏＳ制御情報に基づいて、アンテナＡ３を介して無線受信したＩＱデータＤ２の振り分けを行う。振り分けられたＩＱデータＤ２１，Ｄ２２は、それぞれ、圧縮された後、無線伝送装置５１ｆ，５２ｆ及び無線伝送装置４１ｆ，４２ｆを経由して、ベースバンド処理装置２ｆに供給される。ベースバンド処理装置２ｆでは、圧縮されたＩＱデータＤ２１，Ｄ２２がそれぞれ復号され、ＮＷデータ生成部２２０，２３０によってネットワークデータに変換される。このネットワークデータは、図示しない上位装置に向けて出力される。 Next, the operation of the reception path of the base station device 1f will be described.
In the wireless device 3f, the sorting OVH extraction unit 312 extracts, for example, QoS control information for the own station by the QoS control unit 211 from the OVH region of the wireless signal wirelessly received via the antenna A3. The IQ data distribution unit 313 distributes the IQ data D2 wirelessly received via the antenna A3 based on the QoS control information for the own station. The distributed IQ data D21 and D22 are respectively compressed and then supplied to the baseband processing device 2f via the wireless transmission devices 51f and 52f and the wireless transmission devices 41f and 42f. In the baseband processing device 2f, the compressed IQ data D21 and D22 are respectively decoded and converted into network data by the NW data generation units 220 and 230. This network data is output to a host device (not shown).
　このように、基地局装置１ｆは、ＩＱデータを２つの信号成分に分割して、２組の無線伝送装置間に形成された２つの無線伝送路Ｌ１１，Ｌ１２を介して無線伝送を行うことにより、より高速な伝送レートでのＩＱデータの無線伝送を実現することができる。さらに、基地局装置１ｆは、ベースバンド処理装置においてＱｏＳ制御を行うことにより、優先度の高いＩＱデータの高品質な無線伝送を行うとともに、優先度の低いＩＱデータの品質は劣るがより確実な無線伝送を行うことが可能となる。 As described above, the base station device 1f divides the IQ data into two signal components and performs wireless transmission via the two wireless transmission paths L11 and L12 formed between the two sets of wireless transmission devices. Thus, wireless transmission of IQ data at a higher transmission rate can be realized. Furthermore, the base station apparatus 1f performs QoS control in the baseband processing apparatus, thereby performing high-quality wireless transmission of high-priority IQ data, and lower-priority IQ data quality is lower but more reliable. Wireless transmission can be performed.
　本実施の形態では、２組の無線伝送装置が設けられた場合を例に説明したが、これに限られず、当然ながら３組以上の無線伝送装置が設けられてもよい。 In this embodiment, the case where two sets of wireless transmission devices are provided has been described as an example. However, the present invention is not limited to this, and naturally, three or more sets of wireless transmission devices may be provided.
　また、本実施の形態では、ベースバンド処理装置２ｆに２つのＩＱデータ圧縮部が設けられ、無線装置３ｆに２つのＩＱデータ圧縮部が設けられた場合を例に説明したが、これに限られず、ベースバンド処理装置２ｆに共通のＩＱデータ圧縮部が設けられ、無線装置３ｆに共通のＩＱデータ圧縮部が設けられてもよい。 In the present embodiment, the case where the baseband processing device 2f is provided with two IQ data compression units and the wireless device 3f is provided with two IQ data compression units has been described as an example. However, the present invention is not limited to this. The baseband processing device 2f may be provided with a common IQ data compression unit, and the wireless device 3f may be provided with a common IQ data compression unit.
（基地局装置１ｆの変形例）
　図２３は、基地局装置１ｆの変形例である基地局装置１ｇに設けられたベースバンド処理装置２ｇ及び無線伝送装置４１ｇ，４２ｇの具体的構成例を示すブロック図である。図２４は、基地局装置１ｆの変形例である基地局装置１ｇに設けられた無線装置３ｇ及び無線伝送装置５１ｇ，５２ｇの具体的構成例を示すブロック図である。 (Modification of base station apparatus 1f)
FIG. 23 is a block diagram illustrating a specific configuration example of a baseband processing device 2g and wireless transmission devices 41g and 42g provided in a base station device 1g which is a modification of the base station device 1f. FIG. 24 is a block diagram illustrating a specific configuration example of the wireless device 3g and the wireless transmission devices 51g and 52g provided in the base station device 1g which is a modification of the base station device 1f.
　基地局装置１ｇでは、ベースバンド処理装置２ｇ及び無線伝送装置４１ｇ，４２ｇ間のデータの受け渡し、及び、無線伝送装置５１ｇ，５２ｇ及び無線装置３ｇ間のデータの受け渡しに、ＣＰＲＩ規格の信号（ＣＰＲＩ信号）に代えて、イーサネット規格の信号（以下、ＥＴＨ信号とも称す）が用いられる。 In the base station device 1g, a CPRI standard signal (CPRI signal) is used to exchange data between the baseband processing device 2g and the wireless transmission devices 41g and 42g and to exchange data between the wireless transmission devices 51g and 52g and the wireless device 3g. ), Ethernet standard signals (hereinafter also referred to as ETH signals) are used.
　ベースバンド処理装置２ｇは、ベースバンド処理装置２ｆと比較して、ＣＰＲＩ信号送信部２０２１に代えてＥＴＨ信号送信部２０５１及び圧縮率情報パケット生成部２０６１を有し、かつ、ＣＰＲＩ信号受信部２０３１及び圧縮率情報等抽出部２１０１に代えてＥＴＨ信号受信部２０７１及び圧縮率情報等パケット抽出部２０８１を有する。また、ＣＰＲＩ信号送信部２０２２に代えてＥＴＨ信号送信部２０５２及び圧縮率情報パケット生成部２０６２を有し、かつ、ＣＰＲＩ信号受信部２０３２及び圧縮率情報等抽出部２１０２に代えてＥＴＨ信号受信部２０７２及び圧縮率情報等パケット抽出部２０８２を有する。 Compared to the baseband processing device 2f, the baseband processing device 2g includes an ETH signal transmission unit 2051 and a compression rate information packet generation unit 2061 instead of the CPRI signal transmission unit 2021, and includes a CPRI signal reception unit 2031 and Instead of the compression rate information extraction unit 2101, an ETH signal reception unit 2071 and a compression rate information packet extraction unit 2081 are provided. Further, an ETH signal transmission unit 2052 and a compression rate information packet generation unit 2062 are provided instead of the CPRI signal transmission unit 2022, and an ETH signal reception unit 2072 is provided instead of the CPRI signal reception unit 2032 and the compression rate information extraction unit 2102. And a packet extraction unit 2082 such as compression rate information.
　無線伝送装置４１ｇは、無線伝送装置４１ｆと比較して、ＣＰＲＩ信号４０１１に代えてＥＴＨ信号受信部４０８１を有し、かつ、ＣＰＲＩ信号送信部４０７１に代えてＥＴＨ信号送信部４０９１及び圧縮率情報等パケット生成部４１０１を有する。無線伝送装置４２ｇは、無線伝送装置４２ｆと比較して、ＣＰＲＩ信号４０１２に代えてＥＴＨ信号受信部４０８２を有し、かつ、ＣＰＲＩ信号送信部４０７２に代えてＥＴＨ信号送信部４０９２及び圧縮率情報等パケット生成部４１０２を有する。 Compared with the wireless transmission device 41f, the wireless transmission device 41g has an ETH signal reception unit 4081 instead of the CPRI signal 4011, and an ETH signal transmission unit 4091 instead of the CPRI signal transmission unit 4071, compression rate information, and the like. A packet generation unit 4101 is included. Compared with the wireless transmission device 42f, the wireless transmission device 42g has an ETH signal reception unit 4082 instead of the CPRI signal 4012, and an ETH signal transmission unit 4092 instead of the CPRI signal transmission unit 4072, compression rate information, and the like. A packet generation unit 4102 is included.
　無線伝送装置５１ｇは、無線伝送装置５１ｆと比較して、ＣＰＲＩ信号受信部５０５１に代えてＥＴＨ信号受信部５１０１を有し、かつ、ＣＰＲＩ信号送信部５０４１に代えてＥＴＨ信号送信部５０８１及び圧縮率情報パケット生成部５０９１を有する。無線伝送装置５２ｇは、無線伝送装置５２ｆと比較して、ＣＰＲＩ信号受信部５０５２に代えてＥＴＨ信号受信部５１０２を有し、かつ、ＣＰＲＩ信号送信部５０４２に代えてＥＴＨ信号送信部５０８２及び圧縮率情報パケット生成部５０９２を有する。 Compared with the wireless transmission device 51f, the wireless transmission device 51g includes an ETH signal reception unit 5101 instead of the CPRI signal reception unit 5051, and replaces the CPRI signal transmission unit 5041 with an ETH signal transmission unit 5081 and a compression rate. An information packet generation unit 5091 is included. Compared with the wireless transmission device 52f, the wireless transmission device 52g includes an ETH signal reception unit 5102 instead of the CPRI signal reception unit 5052, and replaces the CPRI signal transmission unit 5042 with an ETH signal transmission unit 5082 and a compression rate. An information packet generation unit 5092 is included.
　無線装置３ｇは、無線装置３ｆと比較して、ＣＰＲＩ信号送信部３０６１に代えてＥＴＨ信号送信部３０９１及び圧縮率情報パケット生成部３１０１を有し、かつ、ＣＰＲＩ信号受信部３０１１に代えてＥＴＨ信号受信部３０７１及び圧縮率情報パケット抽出部３０８１を有する。また、ＣＰＲＩ信号送信部３０６２に代えてＥＴＨ信号送信部３０９２及び圧縮率情報パケット生成部３１０２を有し、かつ、ＣＰＲＩ信号受信部３０１２に代えてＥＴＨ信号受信部３０７２及び圧縮率情報パケット抽出部３０８２を有する。 Compared with the wireless device 3f, the wireless device 3g includes an ETH signal transmitting unit 3091 and a compression rate information packet generating unit 3101 instead of the CPRI signal transmitting unit 3061, and an ETH signal instead of the CPRI signal receiving unit 3011. A receiving unit 3071 and a compression rate information packet extracting unit 3081 are included. Further, an ETH signal transmission unit 3092 and a compression rate information packet generation unit 3102 are provided instead of the CPRI signal transmission unit 3062, and an ETH signal reception unit 3072 and a compression rate information packet extraction unit 3082 are provided instead of the CPRI signal reception unit 3012. Have
　基地局装置１ｇの動作については、ＣＰＲＩ規格からイーサネット規格に変更された以外、基地局装置１ｆと同様であるため、その説明を省略する。基地局装置１ｇは、基地局装置１ｆと同等の効果を奏することができる。 Since the operation of the base station apparatus 1g is the same as that of the base station apparatus 1f except that the CPRI standard is changed to the Ethernet standard, the description thereof is omitted. The base station device 1g can achieve the same effects as the base station device 1f.
　上記実施の形態２～４では、ベースバンド処理装置及び無線装置間のデータインタフェースにＣＰＲＩ規格又はイーサネット規格が採用された場合を例に説明したが、これに限られず、他の高速データインタフェース規格やローカルインタフェース規格が採用されてもよい。 In the second to fourth embodiments, the case where the CPRI standard or the Ethernet standard is adopted as the data interface between the baseband processing device and the wireless device has been described as an example. However, the present invention is not limited to this, and other high-speed data interface standards or A local interface standard may be employed.
　続いて以下では、上述の複数の実施形態で説明された基地局装置の構成例について説明する。図１０は、実施の形態１に係る基地局装置１０の構成例を示すブロック図である。ここでは、実施形態１に係る基地局装置１０の構成例について説明するが、他の実施形態に係る基地局装置についても同様のことが言える。 Subsequently, a configuration example of the base station apparatus described in the above-described embodiments will be described below. FIG. 10 is a block diagram showing a configuration example of the base station apparatus 10 according to the first embodiment. Here, although the structural example of the base station apparatus 10 which concerns on Embodiment 1 is demonstrated, the same thing can be said also about the base station apparatus which concerns on other embodiment.
　図１０を参照すると、基地局装置１０は、RFトランシーバ１００１、ネットワークインターフェース１００３、プロセッサ１００４、及びメモリ１００５を含む。RFトランシーバ１００１は、ユーザ端末（UEs）と通信するためにアナログRF信号処理を行う。RFトランシーバ１００１は、複数のトランシーバを含んでもよい。RFトランシーバ１００１は、アンテナ１００２及びプロセッサ１００４と結合される。RFトランシーバ１００１は、変調シンボルデータ（又はOFDMシンボルデータ）をプロセッサ１００４から受信し、送信RF信号を生成し、送信RF信号をアンテナ１００２に供給する。また、RFトランシーバ１００１は、アンテナ１００２によって受信された受信ＲＦ信号に基づいてベースバンド受信信号を生成し、これをプロセッサ１００４に供給する。 Referring to FIG. 10, the base station device 10 includes an RF transceiver 1001, a network interface 1003, a processor 1004, and a memory 1005. The RF transceiver 1001 performs analog RF signal processing to communicate with user terminals (UEs). The RF transceiver 1001 may include multiple transceivers. RF transceiver 1001 is coupled to antenna 1002 and processor 1004. The RF transceiver 1001 receives modulation symbol data (or OFDM symbol data) from the processor 1004, generates a transmission RF signal, and supplies the transmission RF signal to the antenna 1002. Further, the RF transceiver 1001 generates a baseband received signal based on the received RF signal received by the antenna 1002, and supplies this to the processor 1004.
　ネットワークインターフェース１００３は、ネットワークノード（e.g., 他のeNBs、Mobility Management Entity (MME)、Serving Gateway(S-GW)、及びTSS又はITSサーバ）と通信するために使用される。ネットワークインターフェース１００３は、例えば、IEEE 802.3 seriesに準拠したネットワークインターフェースカード（NIC）を含んでもよい。 The network interface 1003 is used to communicate with network nodes (e.g., other eNBs, Mobility Management Entity (MME), Serving Gateway (S-GW), and TSS or ITS server). The network interface 1003 may include, for example, a network interface card (NIC) compliant with IEEE 802.3 series.
　プロセッサ１００４は、無線通信のためのデジタルベースバンド信号処理を含むデータプレーン処理とコントロールプレーン処理を行う。例えば、LTEおよびLTE-Advancedの場合、プロセッサ１００４によるデジタルベースバンド信号処理は、PDCPレイヤ、RLCレイヤ、MACレイヤ、およびPHYレイヤの信号処理を含んでもよい。さらに、プロセッサ１００４による信号処理は、X2-Uインターフェース及びS1-UインターフェースでのGTP-U・UDP/IPレイヤの信号処理を含んでもよい。また、プロセッサ１００４によるコントロールプレーン処理は、X2APプロトコル、S1-MMEプロトコルおよびRRCプロトコルの処理を含んでもよい。 The processor 1004 performs data plane processing including digital baseband signal processing for wireless communication and control plane processing. For example, in the case of LTE and LTE-Advanced, the digital baseband signal processing by the processor 1004 may include signal processing of a PDCP layer, an RLC layer, a MAC layer, and a PHY layer. Further, the signal processing by the processor 1004 may include signal processing of the GTP-U / UDP / IP layer at the X2-U interface and the S1-U interface. Further, the control plane processing by the processor 1004 may include processing of the X2AP protocol, the S1-MME protocol, and the RRC protocol.
　プロセッサ１００４は、複数のプロセッサを含んでもよい。例えば、プロセッサ１００４は、デジタルベースバンド信号処理を行うモデム・プロセッサ（e.g., DSP）、X2-Uインターフェース及びS1-UインターフェースでのGTP-U・UDP/IPレイヤの信号処理を行うプロセッサ（e.g., DSP）、及びコントロールプレーン処理を行うプロトコルスタック・プロセッサ（e.g., CPU又はMPU）を含んでもよい。 The processor 1004 may include a plurality of processors. For example, the processor 1004 includes a modem processor (eg, DSP) that performs digital baseband signal processing, a processor (eg, processor) that performs signal processing of the GTP-U • UDP / IP layer in the X2-U interface and the S1-U interface. DSP) and a protocol stack processor (eg, CPU or MPU) that performs control plane processing may be included.
　メモリ１００５は、揮発性メモリ及び不揮発性メモリの組み合わせによって構成される。メモリ１００５は、物理的に独立した複数のメモリデバイスを含んでもよい。揮発性メモリは、例えば、Static Random Access Memory（SRAM）若しくはDynamic RAM（DRAM）又はこれらの組み合わせである。不揮発性メモリは、マスクRead Only Memory（MROM）、Electrically Erasable Programmable ROM（EEPROM）、フラッシュメモリ、若しくはハードディスクドライブ、又はこれらの任意の組合せである。メモリ１００５は、プロセッサ１００４から離れて配置されたストレージを含んでもよい。この場合、プロセッサ１００４は、ネットワークインターフェース１００３又は図示されていないI/Oインターフェースを介してメモリ１００５にアクセスしてもよい。 The memory 1005 is configured by a combination of a volatile memory and a nonvolatile memory. The memory 1005 may include a plurality of physically independent memory devices. The volatile memory is, for example, Static Random Access Memory (SRAM), Dynamic RAM (DRAM), or a combination thereof. The non-volatile memory is a mask Read Only Memory (MROM), Electrically Erasable Programmable ROM (EEPROM), flash memory, hard disk drive, or any combination thereof. Memory 1005 may include storage located remotely from processor 1004. In this case, the processor 1004 may access the memory 1005 via the network interface 1003 or an I / O interface not shown.
　メモリ１００５は、基地局装置１０による処理を行うための命令群およびデータを含むソフトウェアモジュール（コンピュータプログラム）を格納してもよい。いくつかの実装において、プロセッサ１００４は、当該ソフトウェアモジュールをメモリ１００５から読み出して実行することで、基地局装置１０の処理を行うよう構成されてもよい。 The memory 1005 may store a software module (computer program) including an instruction group and data for performing processing by the base station apparatus 10. In some implementations, the processor 1004 may be configured to perform processing of the base station apparatus 10 by reading the software module from the memory 1005 and executing the software module.
　ここで、基地局装置１０が有するプロセッサは、図面を用いて説明されたアルゴリズムをコンピュータに行わせるための命令群を含む１又は複数のプログラムを実行する。このプログラムは、様々なタイプの非一時的なコンピュータ可読媒体（non-transitory computer readable medium）を用いて格納され、コンピュータに供給することができる。非一時的なコンピュータ可読媒体は、様々なタイプの実体のある記録媒体（tangible storage medium）を含む。非一時的なコンピュータ可読媒体の例は、磁気記録媒体（例えばフレキシブルディスク、磁気テープ、ハードディスクドライブ）、光磁気記録媒体（例えば光磁気ディスク）、Compact Disc Read Only Memory（CD-ROM）、CD-R、CD-R/W、半導体メモリ（例えば、マスクROM、Programmable ROM（PROM）、Erasable PROM（EPROM）、フラッシュROM、Random Access Memory（RAM））を含む。また、プログラムは、様々なタイプの一時的なコンピュータ可読媒体（transitory computer readable medium）によってコンピュータに供給されてもよい。一時的なコンピュータ可読媒体の例は、電気信号、光信号、及び電磁波を含む。一時的なコンピュータ可読媒体は、電線及び光ファイバ等の有線通信路、又は無線通信路を介して、プログラムをコンピュータに供給できる。 Here, the processor included in the base station apparatus 10 executes one or a plurality of programs including a group of instructions for causing a computer to execute the algorithm described with reference to the drawings. The program can be stored and supplied to a computer using various types of non-transitory computer readable media. Non-transitory computer readable media include various types of tangible storage media (tangible storage medium). Examples of non-transitory computer-readable media are magnetic recording media (eg flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (eg magneto-optical discs), Compact Disc Read Only Memory (CD-ROM), CD-ROM R, CD-R / W, semiconductor memory (for example, mask ROM, Programmable ROM (PROM), Erasable PROM (EPROM), flash ROM, Random Access Memory (RAM)). The program may also be supplied to the computer by various types of temporary computer-readable media. Examples of transitory computer readable media include electrical signals, optical signals, and electromagnetic waves. The temporary computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.
　以上、実施の形態を参照して本願発明を説明したが、本願発明は上記によって限定されるものではない。本願発明の構成や詳細には、発明のスコープ内で当業者が理解し得る様々な変更をすることができる。 The present invention has been described above with reference to the embodiment, but the present invention is not limited to the above. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the invention.
　この出願は、２０１５年１２月２１日に出願された日本出願特願２０１５－２４８７２５を基礎とする優先権を主張し、その開示の全てをここに取り込む。 This application claims priority based on Japanese Patent Application No. 2015-248725 filed on Dec. 21, 2015, the entire disclosure of which is incorporated herein.
　１，１ａ～１ｇ　基地局装置
　２，２ａ～２ｇ　ベースバンド処理装置
　３，３ａ～３ｇ　無線装置
　４，４ａ，４ｂ　無線伝送装置
　５，５ａ，５ｂ　無線伝送装置
　１０　基地局装置
　２０　ベースバンド処理部
　３０　無線部
　４０　第１の信号無線伝送部
　５０　第２の信号無線伝送部
　４１ｃ～４１ｇ，４２ｃ～４２ｇ　無線伝送装置
　５１ｃ～５１ｇ，５２ｃ～５２ｇ　無線伝送装置
　２００，２００ｆ　ベースバンド信号生成部
　２０１　ＩＱデータ圧縮部
　２０２　ＣＰＲＩ信号送信部
　２０３　ＣＰＲＩ信号受信部
　２０４　ＩＱデータ復号部
　２０５　ＥＴＨ信号送信部
　２０６　圧縮率情報パケット生成部
　２０７　ＥＴＨ信号受信部
　２０８　圧縮率情報パケット抽出部
　２０９　圧縮率情報抽出部
　２１１　ＱｏＳ制御部
　２１３，２２３　ＩＱデータ生成部
　２２０，２３０　ＮＷデータ生成部
　２３１，２３４　振り分けＯＶＨ多重部
　３０１　ＣＰＲＩ信号受信部
　３０２　ＩＱデータ復号部
　３０３　無線送信部
　３０４　無線受信部
　３０５　ＩＱデータ圧縮部
　３０６　ＣＰＲＩ信号送信部
　３０７　ＥＴＨ信号受信部
　３０８　圧縮率情報パケット抽出部
　３０９　ＥＴＨ信号送信部
　３１０　圧縮率情報パケット生成部
　３１１　圧縮率情報抽出部
　３１２　振り分けＯＶＨ抽出部
　３１３　ＩＱデータ振り分け部
　４０１　ＣＰＲＩ信号受信部
　４０２　ＯＶＨ多重部
　４０３　無線送信部
　４０４　無線受信部
　４０５　要求圧縮率決定部
　４０６　ＯＶＨ抽出部
　４０７　ＣＰＲＩ信号送信部
　４０８　ＥＴＨ信号受信部
　４０９　ＥＴＨ信号送信部
　４１０　圧縮率情報パケット生成部
　４１１　ＣＰＲＩ信号受信部
　４１２　ＣＰＲＩ信号振り分け部
　４１３　ＣＰＲＩ信号圧縮部
　４１４　ＯＶＨ多重部
　４１５　無線送信部
　４１６　無線受信部
　４１７　要求圧率決定部
　４１８　ＯＶＨ抽出部
　４１９　ＣＰＲＩ信号復元部
　４２０　ＣＰＲＩ信号組み立て部
　４２１　ＣＰＲＩ信号送信部
　４２２　ＣＰＲＩ信号受信部
　４２３　ＣＰＲＩ信号圧縮部
　４２４　ＯＶＨ多重部
　４２５　無線送信部
　４２６　無線受信部
　４２７　要求圧縮率決定部
　４２８　ＯＶＨ抽出部
　４２９　ＣＰＲＩ信号復元部
　４３０　ＣＰＲＩ信号送信部
　５０１　無線受信部
　５０２　要求圧縮率決定部
　５０３　ＯＶＨ抽出部
　５０４　ＣＰＲＩ信号送信部
　５０５　ＣＰＲＩ信号受信部
　５０６　ＯＶＨ多重部
　５０７　無線送信部
　５０８　ＥＴＨ信号送信部
　５０９　圧縮率情報パケット生成部
　５１０　ＥＴＨ信号受信部
　Ａ１～Ａ３　アンテナ
　Ａ１１，Ａ１２　アンテナ
　Ａ２１，Ａ２２　アンテナ
　Ｌ１，Ｌ１１，Ｌ１２　無線伝送路 1, 1a to 1g Base station device 2, 2a to 2g Baseband processing device 3, 3a to 3g Wireless device 4, 4a, 4b Wireless transmission device 5, 5a, 5b Wireless transmission device 10 Base station device 20 Baseband processing unit 30 Radio unit 40 First signal radio transmission unit 50 Second signal radio transmission unit 41c-41g, 42c-42g Radio transmission device 51c-51g, 52c-52g Radio transmission device 200, 200f Baseband signal generation unit 201 IQ data compression Unit 202 CPRI signal transmission unit 203 CPRI signal reception unit 204 IQ data decoding unit 205 ETH signal transmission unit 206 compression rate information packet generation unit 207 ETH signal reception unit 208 compression rate information packet extraction unit 209 compression rate information extraction unit 211 QoS control unit 213, 223 IQ data generator 220, 230 NW data Data generator 231, 234 Sorting OVH multiplexer 301 CPRI signal receiver 302 IQ data decoder 303 Radio transmitter 304 Radio receiver 305 IQ data compressor 306 CPRI signal transmitter 307 ETH signal receiver 308 Compression rate information packet extraction Unit 309 ETH signal transmission unit 310 compression rate information packet generation unit 311 compression rate information extraction unit 312 distribution OVH extraction unit 313 IQ data distribution unit 401 CPRI signal reception unit 402 OVH multiplexing unit 403 wireless transmission unit 404 wireless reception unit 405 required compression rate Determination unit 406 OVH extraction unit 407 CPRI signal transmission unit 408 ETH signal reception unit 409 ETH signal transmission unit 410 Compression rate information packet generation unit 411 CPRI signal reception unit 412 CPRI signal distribution unit 413 CPRI signal pressure Unit 414 OVH multiplexing unit 415 wireless transmission unit 416 wireless reception unit 417 required pressure ratio determination unit 418 OVH extraction unit 419 CPRI signal restoration unit 420 CPRI signal assembly unit 421 CPRI signal transmission unit 422 CPRI signal reception unit 423 CPRI signal compression unit 424 OVH Multiplexer 425 Radio transmitter 426 Radio receiver 427 Request compression rate determination unit 428 OVH extraction unit 429 CPRI signal restoration unit 430 CPRI signal transmission unit 501 Radio reception unit 502 Request compression rate determination unit 503 OVH extraction unit 504 CPRI signal transmission unit 505 CPRI signal reception unit 506 OVH multiplexing unit 507 Wireless transmission unit 508 ETH signal transmission unit 509 Compression rate information packet generation unit 510 ETH signal reception unit A1 to A3 Antenna A11, A12 Antenna A21, A22 Antenna L1, L11, L12 wireless transmission path

Claims (24)

  1. 　圧縮された圧縮ベースバンド信号を出力するベースバンド処理手段と、
    　前記圧縮ベースバンド信号を無線信号で伝送する第１の信号無線伝送手段と、
    　前記圧縮ベースバンド信号を無線伝送で受信する第２の信号無線伝送手段と、
    　前記第２の信号無線伝送手段により受信された前記圧縮ベースバンド信号に基づいて無線信号を送信する無線手段と、
    　を備えた無線通信装置。     Baseband processing means for outputting a compressed compressed baseband signal;
    First signal wireless transmission means for transmitting the compressed baseband signal as a wireless signal;
    Second signal wireless transmission means for receiving the compressed baseband signal by wireless transmission;
    Wireless means for transmitting a wireless signal based on the compressed baseband signal received by the second signal wireless transmission means;
    A wireless communication device comprising:
  2. 　無線受信した無線信号に応じたベースバンド信号を圧縮して圧縮ベースバンド信号を出力する無線手段と、
    　前記圧縮ベースバンド信号を無線信号で伝送する第２の信号無線伝送手段と、
    　前記圧縮ベースバンド信号を無線伝送で受信する第１の信号無線伝送手段と、
    　前記第１の信号無線伝送手段により受信された前記圧縮ベースバンド信号を復号して所定の処理を行うベースバンド処理手段と、
    　を備えた無線通信装置。     A wireless means for compressing a baseband signal corresponding to a wireless signal received wirelessly and outputting a compressed baseband signal;
    Second signal wireless transmission means for transmitting the compressed baseband signal as a wireless signal;
    First signal wireless transmission means for receiving the compressed baseband signal by wireless transmission;
    Baseband processing means for decoding the compressed baseband signal received by the first signal wireless transmission means and performing predetermined processing;
    A wireless communication device comprising:
  3. 　第１ベースバンド信号を生成するベースバンド処理装置と、
    　前記第１ベースバンド信号を第１マイクロ波に変調して無線送信する第１無線伝送装置と、
    　前記第１無線伝送装置との間の無線伝送路を介して無線受信した第１マイクロ波を前記第１ベースバンド信号に復調する第２無線伝送装置と、
    　前記第２無線伝送装置によって復調された前記第１ベースバンド信号を第１高周波信号に変調して外部に無線送信する無線装置と、を備え、
    　前記ベースバンド処理装置は、前記無線伝送路における通信品質に応じた圧縮率で前記第１ベースバンド信号を圧縮し、かつ、前記第１無線伝送装置は、前記無線伝送路における通信品質に応じた変調方式を用いて、圧縮された前記第１ベースバンド信号を前記第１マイクロ波に変調する、無線通信装置。     A baseband processing device for generating a first baseband signal;
    A first wireless transmission device configured to wirelessly transmit the first baseband signal by modulating the first baseband signal;
    A second wireless transmission device that demodulates a first microwave received wirelessly via a wireless transmission path with the first wireless transmission device into the first baseband signal;
    A wireless device that modulates the first baseband signal demodulated by the second wireless transmission device into a first high-frequency signal and wirelessly transmits the modulated signal to the outside,
    The baseband processing device compresses the first baseband signal at a compression rate according to communication quality in the wireless transmission path, and the first wireless transmission device responds to communication quality in the wireless transmission path. A wireless communication apparatus that modulates the compressed first baseband signal into the first microwave using a modulation method.
  4. 　前記ベースバンド処理装置は、前記第１マイクロ波のＣＮ雑音比又は電界強度に応じた圧縮率で前記第１ベースバンド信号を圧縮し、かつ、前記第１無線伝送装置は、前記第１マイクロ波のＣＮ雑音比又は電界強度に応じた変調方式を用いて、圧縮された前記第１ベースバンド信号を前記第１マイクロ波に変調する、
    　請求項３に記載の無線通信装置。     The baseband processing device compresses the first baseband signal at a compression rate according to a CN noise ratio or electric field strength of the first microwave, and the first wireless transmission device transmits the first microwave Modulating the compressed first baseband signal to the first microwave using a modulation scheme according to the CN noise ratio or electric field strength of
    The wireless communication apparatus according to claim 3.
  5. 　前記無線装置は、さらに、外部から無線受信した第２高周波信号を第２ベースバンド信号に復調し、
    　前記第２無線伝送装置は、さらに、前記第２ベースバンド信号を第２マイクロ波に変調して無線送信し、
    　前記第１無線伝送装置は、さらに、前記無線伝送路を介して無線受信した前記第２マイクロ波を前記第２ベースバンド信号に復調し、
    　前記ベースバンド処理装置は、さらに、前記第１無線伝送装置によって復調された前記第２ベースバンド信号に基づいて所定の処理を行い、
    　前記第２無線伝送装置は、
    　前記第１マイクロ波のＣＮ雑音比又は電界強度を検出する第１検出手段を有し、
    　前記第１検出手段の検出結果を、前記第２ベースバンド信号とともに、前記第２マイクロ波として、前記第１無線伝送装置に向けて無線送信する、
    　請求項４に記載の無線通信装置。     The wireless device further demodulates a second high-frequency signal wirelessly received from outside into a second baseband signal,
    The second wireless transmission device further modulates the second baseband signal to a second microwave and wirelessly transmits the second baseband signal,
    The first wireless transmission device further demodulates the second microwave received wirelessly via the wireless transmission path into the second baseband signal,
    The baseband processing device further performs predetermined processing based on the second baseband signal demodulated by the first wireless transmission device,
    The second wireless transmission device is:
    First detection means for detecting a CN noise ratio or electric field strength of the first microwave;
    The detection result of the first detection means is wirelessly transmitted to the first wireless transmission device as the second microwave together with the second baseband signal.
    The wireless communication apparatus according to claim 4.
  6. 　前記無線伝送路における通信品質が第１所定レベルまで向上したことに応じて、前記第１無線伝送装置が、前記第１ベースバンド信号の変調方式を低多値から高多値の変調方式に切り替え、
    　前記無線伝送路における通信品質が前記第１所定レベルよりも高い第２所定レベルまでさらに向上したことに応じて、前記ベースバンド処理装置が、前記第１ベースバンド信号の圧縮率を高倍率から低倍率の圧縮率に切り替える、
    　請求項３～５の何れか一項に記載の無線通信装置。     The first radio transmission apparatus switches the modulation scheme of the first baseband signal from a low multi-level modulation scheme to a high multi-level modulation scheme in response to the communication quality in the radio transmission path being improved to a first predetermined level. ,
    In response to the communication quality in the wireless transmission path being further improved to a second predetermined level higher than the first predetermined level, the baseband processing device reduces the compression rate of the first baseband signal from a high magnification to a low level. Switch to the compression ratio of magnification,
    The wireless communication device according to any one of claims 3 to 5.
  7. 　前記無線伝送路における通信品質が第３所定レベルまで劣化したことに応じて、前記ベースバンド処理装置が、前記第１ベースバンド信号の圧縮率を低倍率から高倍率の圧縮率に切り替え、
    　前記無線伝送路における通信品質が前記第３所定レベルよりも低い第４所定レベルまでさらに劣化したことに応じて、前記第１無線伝送装置が、前記第１ベースバンド信号の変調方式を高多値から低多値の変調方式に切り替える、
    　請求項３～６の何れか一項に記載の無線通信装置。     The baseband processing device switches the compression rate of the first baseband signal from a low magnification to a high magnification compression rate in response to the communication quality in the wireless transmission path being deteriorated to a third predetermined level.
    When the communication quality in the wireless transmission path is further deteriorated to a fourth predetermined level that is lower than the third predetermined level, the first wireless transmission device sets the modulation method of the first baseband signal to a multi-valued value. Switch from low to multi-level modulation,
    The wireless communication device according to any one of claims 3 to 6.
  8. 　前記無線装置は、さらに、外部から無線受信した第２高周波信号を第２ベースバンド信号に復調し、
    　前記第２無線伝送装置は、さらに、前記第２ベースバンド信号を第２マイクロ波に変調して無線送信し、
    　前記第１無線伝送装置は、さらに、前記無線伝送路を介して無線受信した前記第２マイクロ波を前記第２ベースバンド信号に復調し、
    　前記ベースバンド処理装置は、さらに、前記第１無線伝送装置によって復調された前記第２ベースバンド信号に基づいて所定の処理を行い、
    　前記無線装置は、前記無線伝送路における通信品質に応じた圧縮率で前記第２ベースバンド信号を圧縮し、かつ、前記第２無線伝送装置は、前記無線伝送路における通信品質に応じた変調方式を用いて、圧縮された前記第２ベースバンド信号を前記第２マイクロ波に変調する、
    　請求項３に記載の無線通信装置。     The wireless device further demodulates a second high-frequency signal wirelessly received from outside into a second baseband signal,
    The second wireless transmission device further modulates the second baseband signal to a second microwave and wirelessly transmits the second baseband signal,
    The first wireless transmission device further demodulates the second microwave received wirelessly via the wireless transmission path into the second baseband signal,
    The baseband processing device further performs predetermined processing based on the second baseband signal demodulated by the first wireless transmission device,
    The radio apparatus compresses the second baseband signal at a compression rate according to communication quality in the radio transmission path, and the second radio transmission apparatus modulates a modulation scheme according to communication quality in the radio transmission path. To modulate the compressed second baseband signal into the second microwave,
    The wireless communication apparatus according to claim 3.
  9. 　前記ベースバンド処理装置は、前記第１マイクロ波のＣＮ雑音比又は電界強度に応じた圧縮率で前記第１ベースバンド信号を圧縮し、かつ、前記第１無線伝送装置は、前記第１マイクロ波のＣＮ雑音比又は電界強度に応じた変調方式を用いて、圧縮された前記第１ベースバンド信号を前記第１マイクロ波に変調し、
    　前記無線装置は、前記第２マイクロ波のＣＮ雑音比又は電界強度に応じた圧縮率で前記第２ベースバンド信号を圧縮し、かつ、前記第２無線伝送装置は、前記第２マイクロ波のＣＮ雑音比又は電界強度に応じた変調方式を用いて、圧縮された前記第２ベースバンド信号を前記第２マイクロ波に変調する、
    　請求項８に記載の無線通信装置。     The baseband processing device compresses the first baseband signal at a compression rate according to a CN noise ratio or electric field strength of the first microwave, and the first wireless transmission device transmits the first microwave Modulating the compressed first baseband signal into the first microwave using a modulation scheme according to the CN noise ratio or electric field strength of
    The wireless device compresses the second baseband signal at a compression rate according to the CN noise ratio or electric field strength of the second microwave, and the second wireless transmission device transmits the CN of the second microwave. Modulating the compressed second baseband signal into the second microwave using a modulation scheme according to a noise ratio or electric field strength;
    The wireless communication apparatus according to claim 8.
  10. 　前記無線伝送路における通信品質が第１所定レベルまで向上したことに応じて、前記第１及び前記第２無線伝送装置が、それぞれ、前記第１及び前記第２ベースバンド信号の変調方式を低多値から高多値の変調方式に切り替え、
    　前記無線伝送路における通信品質が前記第１所定レベルよりも高い第２所定レベルまでさらに向上したことに応じて、前記ベースバンド処理装置及び前記無線装置が、それぞれ、前記第１及び前記第２ベースバンド信号の圧縮率を高倍率から低倍率の圧縮率に切り替える、
    　請求項８又は９に記載の無線通信装置。     In response to the communication quality in the wireless transmission path being improved to a first predetermined level, the first and second wireless transmission devices respectively reduce the modulation schemes of the first and second baseband signals. Switch from high-value to high-value modulation method,
    In response to the communication quality in the wireless transmission path being further improved to a second predetermined level that is higher than the first predetermined level, the baseband processing device and the wireless device are connected to the first and second bases, respectively. Switch the compression rate of the band signal from high to low.
    The wireless communication apparatus according to claim 8 or 9.
  11. 　前記無線伝送路における通信品質が第３所定レベルまで劣化したことに応じて、前記ベースバンド処理装置及び前記無線装置が、それぞれ、前記第１及び前記第２ベースバンド信号の圧縮率を低倍率から高倍率の圧縮率に切り替え、
    　前記無線伝送路における通信品質が前記第３所定レベルよりも低い第４所定レベルまでさらに劣化したことに応じて、前記第１及び前記第２無線伝送装置が、それぞれ、前記第１及び前記第２ベースバンド信号の変調方式を高多値から低多値の変調方式に切り替える、
    　請求項８～１０の何れか一項に記載の無線通信装置。     In response to the deterioration of the communication quality in the wireless transmission path to the third predetermined level, the baseband processing device and the wireless device respectively reduce the compression rate of the first and second baseband signals from a low magnification. Switch to high compression ratio,
    In response to the fact that the communication quality in the wireless transmission path has further deteriorated to a fourth predetermined level that is lower than the third predetermined level, the first and second wireless transmission devices are connected to the first and second, respectively. Switch the baseband signal modulation method from high multi-level to low multi-level modulation.
    The wireless communication device according to any one of claims 8 to 10.
  12. 　前記ベースバンド処理装置と前記第１無線伝送装置との間のインターフェース、及び、前記第２無線伝送装置と前記無線装置との間のインターフェースには、ＣＰＲＩ規格又はイーサネット規格が採用されている、請求項３～１１の何れか一項に記載の無線通信装置。 A CPRI standard or an Ethernet standard is adopted for an interface between the baseband processing device and the first wireless transmission device and an interface between the second wireless transmission device and the wireless device. Item 12. The wireless communication device according to any one of Items 3 to 11.
  13. 　請求項３～１２の何れか一項に記載の無線通信装置と、
    　前記無線通信装置と無線で通信を行う移動端末と、を備えた無線通信システム。     A wireless communication device according to any one of claims 3 to 12,
    A wireless communication system comprising: a mobile terminal that communicates wirelessly with the wireless communication device.
  14. 　第１ベースバンド信号を生成するベースバンド処理装置と、
    　前記第１ベースバンド信号を分割した第１及び第２分割ベースバンド信号のうち前記第１分割ベースバンド信号を第１マイクロ波に変調して無線送信する第１無線伝送装置と、
    　前記第２分割ベースバンド信号を第２マイクロ波に変調して無線送信する第２無線伝送装置と、
    　前記第１無線伝送装置との間の第１無線伝送路を介して無線受信した第１マイクロ波を前記第１分割ベースバンド信号に復調する第３無線伝送装置と、
    　前記第２無線伝送装置との間の第２無線伝送路を介して無線受信した第２マイクロ波を前記第２分割ベースバンド信号に復調する第４無線伝送装置と、
    　前記第３及び前記第４無線伝送装置によって復調された前記第１及び前記第２分割ベースバンド信号を合成することで再生された前記第１ベースバンド信号を、第１高周波信号に変調して外部に無線送信する無線装置と、を備え、
    　前記第１及び前記第２無線伝送路のそれぞれの通信品質に応じた圧縮率で、前記第１ベースバンド信号、又は、前記第１及び前記第２分割ベースバンド信号が圧縮され、かつ、前記第１及び前記第２無線伝送路のそれぞれの通信品質に応じた変調方式を用いて、圧縮された前記第１及び前記第２分割ベースバンド信号がそれぞれ前記第１及び前記第２マイクロ波に変調される、無線通信装置。     A baseband processing device for generating a first baseband signal;
    A first wireless transmission device configured to wirelessly transmit the first divided baseband signal by modulating the first divided baseband signal among the first and second divided baseband signals obtained by dividing the first baseband signal;
    A second wireless transmission device configured to wirelessly transmit the second divided baseband signal after being modulated into a second microwave;
    A third wireless transmission device that demodulates a first microwave received wirelessly via a first wireless transmission path with the first wireless transmission device into the first divided baseband signal;
    A fourth wireless transmission device that demodulates a second microwave received wirelessly via a second wireless transmission path with the second wireless transmission device into the second divided baseband signal;
    The first baseband signal reproduced by combining the first and second divided baseband signals demodulated by the third and fourth wireless transmission devices is modulated into a first high-frequency signal to be externally A wireless device for wirelessly transmitting to
    The first baseband signal or the first and second divided baseband signals are compressed at a compression rate according to the communication quality of each of the first and second wireless transmission paths, and the first The compressed first and second divided baseband signals are modulated into the first and second microwaves, respectively, using modulation schemes according to the communication qualities of the first and second radio transmission paths. Wireless communication device.
  15. 　前記第１及び前記第２マイクロ波のそれぞれのＣＮ雑音比又は電界強度に応じた圧縮率で、前記第１ベースバンド信号、又は、前記第１及び前記第２分割ベースバンド信号が圧縮され、かつ、前記第１及び前記第２マイクロ波のそれぞれのＣＮ雑音比又は電界強度に応じた変調方式を用いて、圧縮された前記第１及び前記第２分割ベースバンド信号がそれぞれ前記第１及び前記第２マイクロ波に変調される、
    　請求項１４に記載の無線通信装置。     The first baseband signal or the first and second divided baseband signals are compressed at a compression ratio corresponding to the respective CN noise ratio or electric field strength of the first and second microwaves; and The compressed first and second divided baseband signals are converted into the first and second divided baseband signals using a modulation scheme corresponding to the respective CN noise ratios or electric field strengths of the first and second microwaves, respectively. Modulated to 2 microwaves,
    The wireless communication apparatus according to claim 14.
  16. 　前記無線装置は、さらに、外部から無線受信した第２高周波信号を第２ベースバンド信号に復調し、
    　前記第３無線伝送装置は、さらに、前記第２ベースバンド信号を分割した第３及び第４分割ベースバンド信号のうち前記第３分割ベースバンド信号を第３マイクロ波に変調して無線送信し、
    　前記第４無線伝送装置は、さらに、前記第４分割ベースバンド信号を第４マイクロ波に変調して無線送信し、
    　前記第１無線伝送装置は、さらに、前記第１無線伝送路を介して無線受信した前記第３マイクロ波を前記第３分割ベースバンド信号に復調し、
    　前記第２無線伝送装置は、さらに、前記第２無線伝送路を介して無線受信した前記第４マイクロ波を前記第４分割ベースバンド信号に復調し、
    　前記ベースバンド処理装置は、さらに、前記第１及び前記第２無線伝送装置によって復調された前記第３及び前記第４分割ベースバンド信号を合成することで再生された前記第２ベースバンド信号に基づいて所定の処理を行い、
    　前記第３無線伝送装置は、
    　前記第１マイクロ波のＣＮ雑音比又は電界強度を検出する第１検出手段を有し、
    　前記第１検出手段の検出結果を、前記第３分割ベースバンド信号とともに、前記第３マイクロ波として、前記第１無線伝送装置に向けて無線送信し、
    　前記第４無線伝送装置は、
    　前記第２マイクロ波のＣＮ雑音比又は電界強度を検出する第２検出手段を有し、
    　前記第２検出手段の検出結果を、前記第４分割ベースバンド信号とともに、前記第４マイクロ波として、前記第２無線伝送装置に向けて無線送信する、
    請求項１５に記載の無線通信装置。     The wireless device further demodulates a second high-frequency signal wirelessly received from outside into a second baseband signal,
    The third wireless transmission device further modulates the third divided baseband signal out of the third and fourth divided baseband signals obtained by dividing the second baseband signal into a third microwave and wirelessly transmits the modulated signal.
    The fourth wireless transmission device further modulates the fourth divided baseband signal into a fourth microwave and wirelessly transmits the modulated signal.
    The first wireless transmission device further demodulates the third microwave received wirelessly via the first wireless transmission path into the third divided baseband signal,
    The second wireless transmission device further demodulates the fourth microwave received wirelessly via the second wireless transmission path into the fourth divided baseband signal,
    The baseband processing device is further based on the second baseband signal reproduced by combining the third and fourth divided baseband signals demodulated by the first and second wireless transmission devices. To perform the prescribed process
    The third wireless transmission device is:
    First detection means for detecting a CN noise ratio or electric field strength of the first microwave;
    The detection result of the first detection means is wirelessly transmitted to the first wireless transmission device as the third microwave together with the third divided baseband signal,
    The fourth wireless transmission device is
    Second detection means for detecting a CN noise ratio or electric field strength of the second microwave;
    The detection result of the second detection means is wirelessly transmitted to the second wireless transmission device as the fourth microwave together with the fourth divided baseband signal.
    The wireless communication apparatus according to claim 15.
  17. 　前記第１及び前記第２無線伝送路のそれぞれの通信品質に応じた圧縮率で、前記第２ベースバンド信号、又は、前記第３及び前記第４分割ベースバンド信号が圧縮され、かつ、前記第１及び前記第２無線伝送路のそれぞれの通信品質に応じた変調方式を用いて、圧縮された前記第３及び前記第４分割ベースバンド信号がそれぞれ前記第３及び前記第４マイクロ波に変調される、
    　請求項１６に記載の無線通信装置。     The second baseband signal or the third and fourth divided baseband signals are compressed at a compression rate according to the communication quality of each of the first and second wireless transmission paths, and the first The compressed third and fourth divided baseband signals are modulated into the third and fourth microwaves, respectively, using a modulation scheme according to the communication quality of each of the first and second wireless transmission paths. The
    The wireless communication apparatus according to claim 16.
  18. 　前記第１無線伝送装置は、
    　前記第１ベースバンド信号を前記第１及び前記第２分割ベースバンド信号に振り分ける第１データ振分け手段と、
    　前記第１無線伝送路の通信品質に応じた圧縮率で前記第１分割ベースバンド信号を圧縮する第１データ圧縮手段と、
    　前記第１データ圧縮手段によって圧縮された前記第１分割ベースバンド信号を前記第１マイクロ波に変調して無線送信する第１無線送信手段と、を備え、
    　前記第２無線伝送装置は、
    　前記第２無線伝送路の通信品質に応じた圧縮率で前記第２分割ベースバンド信号を圧縮する第２データ圧縮手段と、
    　前記第２データ圧縮手段によって圧縮された前記第２分割ベースバンド信号を前記第２マイクロ波に変調して無線送信する第２無線送信手段と、を備える、
    　請求項１４～１７の何れか一項に記載の無線通信装置。     The first wireless transmission device is
    First data distribution means for distributing the first baseband signal to the first and second divided baseband signals;
    First data compression means for compressing the first divided baseband signal at a compression rate according to the communication quality of the first wireless transmission path;
    First wireless transmission means for modulating and transmitting the first divided baseband signal compressed by the first data compression means to the first microwave;
    The second wireless transmission device is:
    Second data compression means for compressing the second divided baseband signal at a compression rate according to the communication quality of the second wireless transmission path;
    Second wireless transmission means for modulating and transmitting the second divided baseband signal compressed by the second data compression means to the second microwave,
    The wireless communication device according to any one of claims 14 to 17.
  19. 　前記第１無線伝送装置は、
    　前記第１及び前記第２無線伝送路のそれぞれの通信品質に応じた圧縮率で前記第１ベースバンド信号を圧縮するデータ圧縮手段と、
    　前記データ圧縮手段によって圧縮された前記第１ベースバンド信号を、圧縮された前記第１及び前記第２分割ベースバンド信号に振り分ける第１データ振分け手段と、
    　圧縮された前記第１分割ベースバンド信号を前記第１マイクロ波に変調して無線送信する第１無線送信手段と、を備え、
    　前記第２無線伝送装置は、
    　圧縮された前記第２分割ベースバンド信号を前記第２マイクロ波に変調して無線送信する第２無線送信手段を備える、
    　請求項１４～１７の何れか一項に記載の無線通信装置。     The first wireless transmission device is
    Data compression means for compressing the first baseband signal at a compression rate according to the communication quality of each of the first and second wireless transmission paths;
    First data distribution means for distributing the first baseband signal compressed by the data compression means to the compressed first and second divided baseband signals;
    First wireless transmission means for modulating and transmitting the compressed first divided baseband signal to the first microwave;
    The second wireless transmission device is:
    A second wireless transmission unit configured to modulate and compress the compressed second divided baseband signal into the second microwave;
    The wireless communication device according to any one of claims 14 to 17.
  20. 　前記ベースバンド処理装置は、
    　前記第１ベースバンド信号を前記第１及び前記第２分割ベースバンド信号に振り分けるデータ振分け手段と、
    　前記第１無線伝送路の通信品質に応じた圧縮率で前記第１分割ベースバンド信号を圧縮する第１データ圧縮手段と、
    　前記第２無線伝送路の通信品質に応じた圧縮率で前記第２分割ベースバンド信号を圧縮する第２データ圧縮手段と、を備える、
    　請求項１４～１７の何れか一項に記載の無線通信装置。     The baseband processing device includes:
    Data distribution means for distributing the first baseband signal to the first and second divided baseband signals;
    First data compression means for compressing the first divided baseband signal at a compression rate according to the communication quality of the first wireless transmission path;
    Second data compression means for compressing the second divided baseband signal at a compression rate according to the communication quality of the second wireless transmission path,
    The wireless communication device according to any one of claims 14 to 17.
  21. 　前記ベースバンド処理装置と前記第１無線伝送装置との間のインターフェース、及び、前記第２無線伝送装置と前記無線装置との間のインターフェースには、ＣＰＲＩ規格又はイーサネット規格が採用されている、請求項１４～２０の何れか一項に記載の無線通信装置。 A CPRI standard or an Ethernet standard is adopted for an interface between the baseband processing device and the first wireless transmission device and an interface between the second wireless transmission device and the wireless device. Item 21. The wireless communication device according to any one of Items 14 to 20.
  22. 　請求項１４～２１の何れか一項に記載の無線通信装置と、
    　前記無線通信装置と無線で通信を行う移動端末と、を備えた無線通信システム。     A wireless communication device according to any one of claims 14 to 21,
    A wireless communication system comprising: a mobile terminal that communicates wirelessly with the wireless communication device.
  23. 　第１ベースバンド信号をベースバンド処理装置により生成するステップと、
    　前記第１ベースバンド信号を第１マイクロ波に変調して無線送信するステップと、
    　無線受信した前記第１マイクロ波を前記第１ベースバンド信号に復調するステップと、
    　復調された前記第１ベースバンド信号を第１高周波信号に変調して外部に無線送信するステップと、を備え、
    　前記ベースバンド処理装置ではマイクロ波が伝送される無線伝送路の通信品質に応じた圧縮率で前記第１ベースバンド信号が圧縮され、かつ、前記無線伝送路における通信品質に応じた変調方式を用いて、圧縮された前記第１ベースバンド信号が前記第１マイクロ波に変調される、無線通信方法。     Generating a first baseband signal by a baseband processor;
    Modulating the first baseband signal to a first microwave and wirelessly transmitting;
    Demodulating the first microwave received wirelessly into the first baseband signal;
    Modulating the demodulated first baseband signal into a first high-frequency signal and wirelessly transmitting to the outside,
    In the baseband processing device, the first baseband signal is compressed at a compression rate according to the communication quality of the wireless transmission path through which the microwave is transmitted, and a modulation method according to the communication quality in the wireless transmission path is used. And the compressed first baseband signal is modulated into the first microwave.
  24. 　第１ベースバンド信号を生成するステップと、
    　前記第１ベースバンド信号を分割した第１及び第２分割ベースバンド信号のうち前記第１分割ベースバンド信号を第１マイクロ波に変調して無線送信するステップと、
    　前記第２分割ベースバンド信号を第２マイクロ波に変調して無線送信するステップと、
    　無線受信した第１マイクロ波を前記第１分割ベースバンド信号に復調するステップと、
    　無線受信した第２マイクロ波を前記第２分割ベースバンド信号に復調するステップと、
    　前記第１及び前記第２分割ベースバンド信号を合成することで再生された前記第１ベースバンド信号を、第１高周波信号に変調して外部に無線送信するステップと、を備え、
    　マイクロ波が伝送される無線伝送路の通信品質に応じた圧縮率で、前記第１ベースバンド信号、又は、前記第１及び前記第２分割ベースバンド信号が圧縮され、かつ、前記無線伝送路の通信品質に応じた変調方式を用いて、圧縮された前記第１及び前記第２分割ベースバンド信号がそれぞれ前記第１及び前記第２マイクロ波に変調される、無線通信方法。     Generating a first baseband signal;
    Modulating the first divided baseband signal out of the first and second divided baseband signals obtained by dividing the first baseband signal into a first microwave and wirelessly transmitting;
    Modulating the second divided baseband signal to a second microwave and wirelessly transmitting;
    Demodulating the first microwave received wirelessly into the first divided baseband signal;
    Demodulating the second microwave received wirelessly into the second divided baseband signal;
    Modulating the first baseband signal reproduced by synthesizing the first and second divided baseband signals into a first high frequency signal and wirelessly transmitting to the outside,
    The first baseband signal or the first and second divided baseband signals are compressed at a compression rate according to the communication quality of the wireless transmission path through which the microwave is transmitted, and the wireless transmission path A wireless communication method, wherein the compressed first and second divided baseband signals are modulated into the first and second microwaves, respectively, using a modulation scheme according to communication quality.
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