WO2011129102A1 - 通信システム、メインユニット、無線アクセスユニット及び通信方法 - Google Patents
通信システム、メインユニット、無線アクセスユニット及び通信方法 Download PDFInfo
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- WO2011129102A1 WO2011129102A1 PCT/JP2011/002169 JP2011002169W WO2011129102A1 WO 2011129102 A1 WO2011129102 A1 WO 2011129102A1 JP 2011002169 W JP2011002169 W JP 2011002169W WO 2011129102 A1 WO2011129102 A1 WO 2011129102A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
- H04B10/25752—Optical arrangements for wireless networks
- H04B10/25753—Distribution optical network, e.g. between a base station and a plurality of remote units
- H04B10/25754—Star network topology
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
- H04B10/25752—Optical arrangements for wireless networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
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- 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
- H04W88/085—Access point devices with remote components
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- 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
- H04W88/10—Access point devices adapted for operation in multiple networks, e.g. multi-mode access points
Definitions
- the present invention relates to a communication system, a main unit, a radio access unit, and a communication method, and in particular, communication for making a space such as a building or an underground city where a radio signal from a radio base station installed outdoors does not reach a serviceable area.
- the present invention relates to a system, a main unit, a radio access unit, and a communication method.
- FIG. 1 is a diagram showing a conventional communication system 1.
- the communication system 1 in FIG. 1 mainly includes a radio base station apparatus 2, a main unit 3 ⁇ ⁇ ⁇ ⁇ , and a plurality of slave units 4.
- mobile_unit 4 comprises single cell # 10.
- the radio base station apparatus 2 transmits a downlink signal to the main unit 3, and the main unit 3 distributes the downlink signal to a plurality of slave units 4.
- Each slave unit 4 wirelessly transmits the distributed downlink signal to a terminal (not shown) in the single cell # 10.
- the plurality of slave units 4 receive an uplink signal that is a radio signal transmitted from a terminal (not shown) in the single cell # 10 and transmits the received uplink signal to the main unit 3.
- the main unit 3 transmits the received uplink signal to the radio base station apparatus 2.
- the conventional communication system 1 comprises single cell # 10 by the some subunit
- Patent Literature 1 As a communication system that solves the above problems, it is conceivable to adopt the system configuration shown in Patent Document 1 that uses different communication systems together. According to Patent Literature 1, since users can be segregated by a communication system, the above-described problem can be solved.
- Patent Document 1 equipment for performing modulation or demodulation of all the different communication systems is mounted on a base unit that is a base unit. Therefore, in Patent Document 1, there is a problem that it is necessary to significantly change the existing system configuration and it is not possible to flexibly cope with a change in the system such as a change in the number of cells after the start of operation.
- the object of the present invention is that it is not necessary to significantly change the existing system configuration, and it is possible to flexibly respond to the system change, thereby reducing the cost associated with the introduction of the system and ensuring a wide range of coverage. It is possible to provide a communication system, a main unit, a radio access unit, and a communication method that can improve user throughput.
- the communication system of the present invention is a communication system comprising a radio base station device, a main unit connected to the radio base station device and a network, and a plurality of radio access units connected to the main unit,
- the radio base station apparatus outputs a downlink signal of the first communication system to the main unit, and the main unit receives the downlink signal of the first communication system input from the radio base station apparatus and the network.
- the input downlink signal of the second communication system is output to each of the plurality of radio access units, and the plurality of radio access units constitute a single cell of the first communication system, A multi-cell of the second communication system is individually configured in a cell and input from the main unit.
- the downlink signal of the first communication system is transmitted to a terminal using the first communication system of the single cell, and the downlink signal of the second communication system input from the main unit is subjected to wired protocol signal processing. After that, a configuration is adopted in which radio protocol signal processing is performed and transmitted to each terminal using the second communication system of the multi-cell.
- the communication system of the present invention is a communication system including a radio base station apparatus, a main unit connected to the radio base station apparatus and a network, and a plurality of radio access units connected to the main unit.
- the plurality of radio access units constitute a single cell of the first communication system, and each of the plurality of radio access units individually constitutes a multi-cell of the second communication system within the single cell, and the first cell of the single cell
- An uplink signal of a first communication system received from a terminal using the communication system is output to the main unit, and an uplink signal of the second communication system received from a terminal using the second communication system of the multi-cell
- the wired protocol signal processing is performed on the main unit.
- the main unit combines the uplink signals of the first communication system input from the plurality of radio access units and outputs the synthesized signals to the radio base station apparatus, and the input from the plurality of radio access units.
- the uplink signal of the second communication system is output to the network, and the radio base station apparatus adopts a configuration for acquiring the combined uplink signal of the first communication system from the main unit.
- the main unit of the present invention includes a distribution unit that distributes an input downlink signal of the first communication system to a plurality of downlink signals of the first communication system, and each of the first communication systems distributed by the distribution unit. And a multiplexing means for generating and outputting a first multiplexed signal by multiplexing each downlink signal of the received downlink signal of the second communication system.
- the main unit of the present invention acquires a plurality of first multiplexed signals obtained by multiplexing the uplink signal of the first communication system and the uplink signal of the second communication system, and acquires the acquired first multiplexed signal Are separated into the upstream signal of the first communication system and the upstream signal of the second communication system, respectively, and the separated means for outputting the separated upstream signal of the second communication system, and the separation means
- a combining unit that combines and outputs the uplink signals of the first communication systems.
- the radio access unit of the present invention includes an acquisition unit that acquires a downlink signal of the first communication system and a downlink signal of the second communication system, and a downlink signal of the second communication system acquired by the acquisition unit, A single cell of the first communication system configured with a protocol processing means for processing a wireless protocol signal after processing a wired protocol signal, and a downlink signal of the first communication system acquired by the acquisition means together with another wireless access unit
- the second communication in which the downlink signal of the second communication system, which is transmitted to the terminal using the first communication system and processed by the protocol processing means, is configured in the single cell.
- the radio access unit of the present invention receives an uplink signal of the first communication system from a terminal that uses the first communication system of a single cell of the first communication system configured together with another radio access unit.
- receiving means for receiving an uplink signal of the second communication system from a terminal using the second communication system of the multi-cell of the second communication system configured in the single cell, and received by the receiving means
- Protocol processing means for processing a wired protocol signal after processing an upstream signal of the second communication system after wireless protocol signal processing, and the wired signal by the upstream signal of the first communication system received by the receiving means and the protocol processing means.
- An output unit that outputs the upstream signal of the second communication system that has processed the protocol signal It adopts a configuration comprising the, the.
- the communication method of the present invention is a communication method in a communication system comprising a radio base station device, a main unit connected to the radio base station device and a network, and a plurality of radio access units connected to the main unit.
- the radio base station apparatus outputs a downlink signal of the first communication system to the main unit; and the downlink signal of the first communication system input from the radio base station apparatus by the main unit.
- And outputting a downlink signal of the second communication system input from the network to each of the plurality of radio access units, and the plurality of radio access units constitute a single cell of the first communication system And each of the multi-cells of the second communication system individually in the single cell.
- the second communication system configured to transmit a downlink signal of the first communication system input from the main unit to a terminal using the first communication system of the single cell and input from the main unit A downlink protocol signal, a wired protocol signal process, a radio protocol signal process, and a transmission to each of the terminals using the second communication system of the multi-cell.
- the communication method of the present invention is a communication in a communication system comprising a radio base station apparatus, a main unit connected to the radio base station apparatus and a network, and a plurality of radio access units connected to the main unit.
- the plurality of radio access units constitutes a single cell of a first communication system and each individually constitutes a multi-cell of a second communication system within the single cell, A second communication system that outputs an uplink signal of the first communication system received from a terminal that uses the first communication system to the main unit and that is received from a terminal that uses the second communication system of the multi-cell.
- the upstream signal is subjected to wireless protocol signal processing and then wired protocol signal processing to A step of outputting to the unit; and the main unit combines the uplink signals of the first communication system input from the plurality of radio access units and outputs to the radio base station apparatus, and the plurality of radio access units Outputting the uplink signal of the second communication system input from the network to the network, and the radio base station apparatus acquiring the synthesized uplink signal of the first communication system from the main unit. It was made to have.
- the present invention it is not necessary to significantly change the existing system configuration, and it is possible to flexibly respond to the system change, thereby reducing the cost associated with the introduction of the system and ensuring a wide range of coverage.
- the user throughput can be improved.
- the figure which shows the structure of the conventional communication system The figure which shows the structure of the communication system which concerns on Embodiment 1 of this invention.
- FIG. 2 is a diagram showing a configuration of the communication system 100 according to Embodiment 1 of the present invention.
- the communication system 100 includes a radio base station device 102, a core network (CN) 103, a termination device (OLT) 104, a termination device (ONU) 105, a router 106, a main unit 107, and a plurality of radio access units. 10-1 to 108-n (n is an arbitrary natural number of 2 or more).
- the radio base station apparatus 102 and the main unit 107 are connected by a single electric signal transmission cable such as a coaxial line.
- the main unit 107 and each of the wireless access units 108-1 to 108-n are connected in a star shape, and are connected by a single optical signal transmission cable such as an optical fiber.
- a single optical signal transmission cable such as an optical fiber.
- the first communication system is WCDMA (Wideband Code Division Multiple Access) and the second communication system is LTE (Long Term Evolution) will be described as an example.
- WCDMA of the first communication system and LTE of the second communication system transmit and receive data having different contents.
- signals transmitted from radio base station apparatus 102 and core network 103 to radio access units 108-1 to 108-n are downlink signals, and radio signals are transmitted from radio access units 108-1 to 108-n.
- a signal transmitted to the base station apparatus 102 and the core network 103 will be described as an uplink signal.
- the radio base station apparatus 102 is a radio base station for WCDMA, and outputs a WCDMA downlink signal that is an RF signal to the main unit 107. Further, the radio base station apparatus 102 receives a WCDMA uplink signal that is an RF signal from the main unit 107.
- the core network 103 outputs user data and control signals for the second LTE communication system to the terminal device 104 as LTE IP signals (hereinafter referred to as “IP signals”) generated according to the IP protocol. Further, the core network 103 receives the IP signal from the termination device 104.
- IP signals LTE IP signals
- the termination device 104 converts the IP signal input from the core network 103 from an electrical signal to an optical signal and outputs the signal to the termination device 105. In addition, the termination device 104 converts the IP signal input from the termination device 105 from an optical signal to an electrical signal and outputs the electrical signal to the core network 103.
- the terminating device 105 converts the IP signal input from the terminating device 104 from an optical signal to an electrical signal and outputs it to the router 106.
- the termination device 105 converts the IP signal input from the router 106 from an electrical signal to an optical signal and outputs the signal to the termination device 104.
- the router 106 relays transmission of an IP signal from the termination device 105 to the main unit 107 or from the main unit 107 to the termination device 105.
- the main unit 107 distributes the WCDMA downlink signal input from the radio base station apparatus 102 to a plurality of WCDMA downlink signals, and converts the distributed WCDMA downlink signal from an electrical signal to an optical signal. Further, the main unit 107 wavelength-division-multiplexes (WDM: Wavelength DivisionplexMultiplexing) the WCDMA downlink signal converted into the optical signal and the IP signal input from the router 106, and outputs them to the radio access units 108-1 to 108-n. To do.
- WDM Wavelength DivisionplexMultiplexing
- the main unit 107 also separates the wavelength division multiplexed multiplexed signal input from each of the radio access units 108-1 to 108-n into a WCDMA upstream signal and an IP signal, and separates the separated WCDMA upstream signal and the IP signal. Converts optical signals to electrical signals. Further, the main unit 107 combines the WCDMA uplink signals converted into electric signals and outputs the combined signals to the radio base station apparatus 102. Further, the main unit 107 outputs an IP signal converted into an electric signal to the router 106. Details of the configuration of the main unit 107 will be described later.
- the plurality of radio access units 108-1 to 108-n constitute a single cell # 120.
- Each of the plurality of radio access units 108-1 to 108-n individually configures multicells # 130-1 to # 130-n in single cell # 120. That is, the plurality of radio access units 108-1 to 108-n constitute the same number of multicells # 130-1 to # 130-n as the radio access units 108-1 to 108-n.
- the plurality of radio access units 108-1 to 108-n separate the multiplexed signal input from the main unit 107 into a WCDMA downlink signal and an IP signal, and the separated WCDMA downlink signal and the IP signal are converted from an optical signal to an electrical signal.
- the plurality of radio access units 108-1 to 108-n transmit the WCDMA downlink signal converted into the electric signal to the terminal using the first communication system of the single cell # 120. Further, the plurality of radio access units 108-1 to 108-n transmit IP signals converted into electric signals to terminals using the second communication system of the corresponding multicells # 130-1 to # 130-n. . In addition, the plurality of radio access units 108-1 to 108-n are the WCDMA uplink signals transmitted from the terminals using the first communication system of the single cell # 120 or the first of the multicells # 130-1 to # 130-n. The IP signal transmitted from the terminal using the communication system 2 is received.
- the plurality of radio access units 108-1 to 108-n convert the received WCDMA uplink signal and IP signal from an electric signal to an optical signal, and wavelength division multiplex the converted WCDMA uplink signal and the IP signal. Thus, a multiplexed signal is generated, and the generated multiplexed signal is output to the main unit 107. Details of the configuration of the radio access units 108-1 to 108-n will be described later.
- FIG. 3 is a block diagram showing the configuration of the main unit 107.
- the main unit 107 includes a distributor 301, E / O converters 302-1 to 302-n, O / E converters 303-1 to 303-n, medium converters 304-1 to 304-n, It is mainly composed of WDM couplers 305-1 to 305-n and a combiner 306.
- the optical interface units 350-1 to 350-n include E / O converters 302-1 to 302-n, O / E converters 303-1 to 303-n, and medium converters 304-1 to 304. -N and WDM couplers 305-1 to 305-n.
- the radio base station apparatus 102 and the distributor 301 are connected by a single electric signal transmission cable such as a coaxial line.
- Radio base station apparatus 102 and combiner 306 are connected by a single electric signal transmission cable such as a coaxial line.
- the WDM couplers 305-1 to 305-n and the respective wireless access units 108-1 to 108-n are connected in a star shape, and are connected by a single optical signal transmission cable such as an optical fiber.
- Distributor 301 distributes the WCDMA downlink signal input from radio base station apparatus 102 to n WCDMA downlink signals, and distributes each of the n distributed WCDMA downlink signals to E / O converters 302-1 to 302-n. To each output.
- the E / O converters 302-1 to 302-n convert the WCDMA downstream signal input from the distributor 301 from an electrical signal to an optical signal having a wavelength ⁇ d_RF , and output the optical signal to the WDM couplers 305-1 to 305-n. .
- the O / E converters 303-1 to 303-n convert the WCDMA upstream signal input from the WDM couplers 305-1 to 305-n from an optical signal having the wavelength d_RF into an electrical signal and output the resultant signal to the combiner 306.
- Media converters 304-1 to 304-n convert the IP signal input from router 106 from an electrical signal to an optical signal of wavelength d_IP , and output the optical signal to WDM couplers 305-1 to 305-n. Further, the medium converters 304-1 to 304-n convert the optical signals having wavelengths different from the wavelengths of the optical signals converted by the E / O converters 302-1 to 302-n.
- WDM couplers 305-1 ⁇ 305-n includes a WCDMA downlink signal wavelength d_RF input from the E / O converter 302-1 ⁇ 302-n, a wavelength d_IP input from media converters 304-1 ⁇ 304-n A multiplexed signal is generated by wavelength division multiplexing the IP signal. Also, the WDM couplers 305-1 to 305-n output the generated multiplexed signal to the radio access units 108-1 to 108-n. Also, WDM couplers 305-1 ⁇ 305-n are multiplexed signal input from radio access units 108-1 ⁇ 108-n, it is separated into the IP signal WCDMA uplink signal wavelength d_RF and wavelength D_IP.
- the WDM couplers 305-1 to 305-n output the separated WCDMA upstream signal of wavelength d_RF to the O / E converters 303-1 to 303-n, and the separated IP signal of wavelength d_IP to the medium converter Output to 304-1 to 304-n.
- the combiner 306 combines the WCDMA uplink signals input from the O / E converters 303-1 to 303-n and outputs the combined signals to the radio base station apparatus 102.
- FIG. 4 is a block diagram showing the configuration of the radio access unit 108-1. Note that the configuration of the radio access units 108-2 to 108-n is the same as that of the radio access unit 108-1 in FIG.
- the radio access unit 108-1 includes a WDM coupler 401, an O / E converter 402, an E / O converter 403, a medium converter 404, a radio base station function unit 405, an AMP unit 406, and an antenna 407. -1, 407-2.
- a WDM coupler 401 for converting signals to DC signals
- O / E converter 402 for converting signals to DC signals
- E / O converter 403 for converting to DC to base station
- a radio base station function unit 405 for controlling the radio base station function of the radio base station function unit 406
- an antenna 407. -1, 407-2 a radio base station function unit
- a multiplex signal input from the main unit 107 is separated into the IP signal WCDMA downstream signal wavelength d_IP wavelength D_RF.
- the WDM coupler 401 outputs the separated WCDMA downstream signal having the wavelength d_RF to the O / E converter 402 and outputs the separated IP signal having the wavelength d_IP to the medium converter 404.
- the WDM coupler 401 wavelength-division-multiplexes the WCDMA upstream signal having the wavelength d_RF input from the E / O converter 403 and the IP signal having the wavelength d_IP input from the medium converter 404 to generate a multiplexed signal. Further, the WDM coupler 401 outputs the generated multiplexed signal to the main unit 107.
- the O / E converter 402 converts the WCDMA downstream signal having the wavelength d_RF input from the WDM coupler 401 from an optical signal to an electrical signal and outputs the electrical signal to the AMP unit 406.
- the E / O converter 403 converts the WCDMA upstream signal input from the AMP unit 406 from an electrical signal to an optical signal having a wavelength d_RF and outputs the optical signal to the WDM coupler 401.
- the medium converter 404 converts the IP signal of the wavelength d_IP input from the WDM coupler 401 from an optical signal to an electric signal and outputs it to the radio base station function unit 405.
- the medium converter 404 converts the IP signal input from the radio base station function unit 405 from an electric signal to an optical signal having a wavelength d_IP and outputs the optical signal to the WDM coupler 401.
- the medium converter 404 converts the optical signal having a wavelength different from the wavelength of the optical signal converted by the E / O converter 403.
- the wireless base station function unit 405 processes the IP signal input from the medium converter 404 after processing the wired protocol signal corresponding to LTE, performs wireless protocol signal processing, and outputs the result to the AMP unit 406 as an LTE RF downlink signal. Also, the radio base station function unit 405 processes the LTE RF uplink signal input from the AMP unit 406, processes the radio protocol signal corresponding to the LTE, performs the wired protocol signal processing, and outputs the LTE protocol IP signal to the medium converter 404. To do. For example, the radio base station function unit 405 outputs an LTE IP signal to the medium converter 404 as an S1 interface signal. Note that the radio base station function unit 405 outputs an Iuh interface signal in the case of a WCDMA uplink signal.
- the radio base station function unit 405 has the same function as, for example, a femtocell base station.
- the femtocell is a small base station, and constitutes a call area of a mobile phone having a very small range with a radius of about several tens of meters.
- the AMP unit 406 amplifies the WCDMA downlink signal input from the O / E converter 402, and wirelessly transmits the signal from the antenna 407-1 to a terminal using the first communication system of the single cell # 120. Also, the AMP unit 406 amplifies the LTE RF downlink signal input from the radio base station function unit 405, and transmits it from the antenna 407-2 to the terminal using the corresponding second communication system of the multicell # 130-1. To do. Also, the AMP unit 406 receives signals from a terminal using the first communication system of the single cell # 120 or a terminal using the second communication system of the multicell # 130-1 via the antennas 407-1 and 407-2. The processed signal is amplified and filtered as necessary.
- the AMP unit 406 extracts a frequency band signal used for the WCDMA uplink signal or a frequency band signal used for the LTE RF uplink signal. Further, the AMP unit 406 outputs the extracted WCDMA uplink signal to the E / O converter 403. Further, the AMP unit 406 outputs the extracted LTE RF uplink signal to the radio base station function unit 405. Note that the antennas 407-1 and 407-2 may be used separately for WCDMA and LTE, or may be shared by WCDMA and LTE.
- the radio base station apparatus 102 outputs the WCDMA downlink signal to the main unit 107 as an RF signal.
- the main unit 107 distributes the WCDMA downlink signal input from the radio base station apparatus 102 to the same number of WCDMA downlink signals as the radio access units 108-1 to 108-n.
- the main unit 107 converts the distributed WCDMA downlink signal and the IP signal input from the core network 103 via the termination device 104, the termination device 105, and the router 106 from an electrical signal to an optical signal.
- the main unit 107 generates a multiplexed signal by wavelength division multiplexing the WCDMA downlink signal converted into the optical signal and the IP signal, and outputs the generated multiplexed signal to the radio access units 108-1 to 108-n. .
- each of the radio access units 108-1 to 108-n separates the multiplexed signal input from the main unit 107 into a WCDMA downlink signal and an IP signal, and the separated WCDMA downlink signal and IP signal are converted from an optical signal to an electrical signal. Convert to
- each of the wireless access units 108-1 to 108-n performs a wired protocol signal processing and a wireless protocol signal processing corresponding to LTE on the IP signal converted into the electrical signal, and multi-cell # 130- Wirelessly transmit to terminals 1 to # 130-n.
- each of the wireless access units 108-1 to 108-n wirelessly transmits a WCDMA downlink signal converted into an electric signal to a terminal that uses the first communication system of the single cell # 120.
- Each of the radio access units 108-1 to 108-n receives a WCDMA uplink signal from a terminal that uses the first communication system of the single cell # 120, and also receives the second signals of the multicells # 130-1 to # 130-n.
- An LTE RF uplink signal is received from a terminal using the communication system.
- each of the wireless access units 108-1 to 108-n performs a wireless protocol signal processing and a wired protocol signal processing corresponding to LTE on the received LTE RF uplink signal to generate an LTE IP signal.
- each of the wireless access units 108-1 to 108-n converts the generated IP signal and the received WCDMA uplink signal from an electric signal to an optical signal.
- each of the radio access units 108-1 to 108-n generates a multiplexed signal by wavelength division multiplexing the WCDMA upstream signal converted into the optical signal and the IP signal, and outputs the generated multiplexed signal to the main unit 107. To do.
- the main unit 107 separates the multiplexed signal input from each of the radio access units 108-1 to 108-n into a WCDMA upstream signal and an IP signal.
- the main unit 107 converts the separated WCDMA upstream signal and IP signal from an optical signal to an electrical signal.
- the main unit 107 combines the WCDMA uplink signals converted into electric signals and outputs the combined signals to the radio base station apparatus 102.
- the main unit 107 outputs the IP signal converted into the electric signal to the core network 103 via the router 106, the termination device 105, and the termination device 104.
- each wireless access unit it is not necessary to significantly change the existing system configuration by providing each wireless access unit with a wireless base station function unit that wirelessly transmits and receives LTE IP signals. It is possible to respond flexibly to changes. As a result, the cost associated with the introduction of the system can be reduced. Moreover, according to this Embodiment, since a single cell is comprised by several radio
- FIG. 5 is a diagram showing a configuration of a communication system 500 according to Embodiment 2 of the present invention.
- the communication system 500 shown in FIG. 5 has a radio base station apparatus 501 instead of the radio base station apparatus 102, and a main unit 107 instead of the main unit 107, compared to the communication system 100 according to Embodiment 1 shown in FIG. Unit 502, and wireless access units 503-1 to 503-n instead of the wireless access units 108-1 to 108-n.
- FIG. 5 parts having the same configuration as in FIG.
- the communication system 500 includes a core network (CN) 103, a termination device (OLT) 104, a termination device (ONU) 105, a router 106, a radio base station device 501, a main unit 502, and a plurality of radio access units. 503-1 to 503-n.
- the core network 103 and the radio base station apparatus 501 are connected by a single electric signal transmission cable such as a coaxial line.
- the radio base station apparatus 501 and the main unit 502 are connected by a single optical signal transmission cable such as an optical fiber, and are connected by a CPRI (Common Public Radio Interface) interface.
- CPRI Common Public Radio Interface
- the first communication system and the second communication system are multiplexed using a CPRI format that transmits an IQ signal for two antennas with one carrier frequency.
- the CPRI signal output between the radio base station apparatus 501 and the main unit 502 does not employ the diversity method in the uplink and downlink. That is, an IQ signal for one antenna is output.
- the main unit 502 and each of the wireless access units 503-1 to 503-n are connected in a star shape and are connected by a single optical signal transmission cable such as an optical fiber.
- each configuration will be described in detail.
- a case where the first communication system is LTE and the second communication system is LTE will be described as an example. Also, the LTE of the first communication system and the LTE of the second communication system transmit / receive data having different contents.
- a signal transmitted from core network 103 to radio access units 503-1 to 503-n is a downlink signal, and is transmitted from radio access units 503-1 to 503-n to core network 103. The signal will be described as an upstream signal.
- the core network 103 outputs the LTE IP signal of the first communication system to the radio base station apparatus 501, and outputs the LTE IP signal of the second communication system to the termination apparatus 104. Also, the core network 103 receives the LTE IP signal of the first communication system from the radio base station apparatus 501 and receives the LTE IP signal of the second communication system from the termination apparatus 104.
- the radio base station apparatus 501 is an LTE radio base station that converts an IP signal input from the core network 103 into a CPRI downlink signal, which is an optical signal, and converts the converted CPRI downlink signal into a CPRI uplink signal and a wavelength. Divide and multiplex and output to the main unit 502. Also, the radio base station apparatus 501 converts the CPRI downlink signal and the wavelength division multiplexed CPRI uplink signal, which are optical signals input from the main unit 502, into an IP signal and outputs the IP signal to the core network 103.
- the router 106 relays transmission of an IP signal from the termination device 105 to the main unit 502 or from the main unit 502 to the termination device 105.
- the main unit 502 separates the CPRI downlink signal input from the radio base station apparatus 501 from the CPRI uplink signal. Also, the main unit 502 converts the separated CPRI downlink signal from an optical signal to an electrical signal, and branches the CPRI downlink signal converted into the electrical signal in units of frames. Also, the main unit 502 generates a downlink multiplexed signal by frame multiplexing the branched CPRI downlink signal and the IP signal input from the router 106, and converts the generated downlink multiplexed signal from an electrical signal to an optical signal.
- the main unit 502 wavelength-division-multiplexes the downlink multiplexed signal converted into the optical signal with the uplink multiplexed signal and outputs it to the radio access units 503-1 to 503-n.
- the main unit 502 separates the uplink multiplexed signal input from each of the radio access units 503-1 to 503-n from the downlink multiplexed signal, and separates the separated uplink multiplexed signal in units of frames. Further, the main unit 502 adds the uplink multiplexed signals separated in frame units to generate a CPRI uplink signal, and converts the generated CPRI uplink signal from an electrical signal to an optical signal.
- the main unit 502 wavelength-division-multiplexes the CPRI uplink signal converted into the optical signal with the CPRI downlink signal and outputs the result to the radio base station apparatus 501. Details of the configuration of the main unit 502 will be described later.
- the plurality of radio access units 503-1 to 503-n constitute a single cell # 520.
- Each of the plurality of radio access units 503-1 to 503-n individually configures multicells # 530-1 to # 530-n in the single cell # 520. That is, the plurality of radio access units 503-1 to 503-n constitute the same number of multicells # 530-1 to # 530-n as the radio access units 503-1 to 503-n.
- the plurality of radio access units 503-1 to 503-n separate the downlink multiplexed signal input from the main unit 502 from the uplink multiplexed signal, and convert the separated downlink multiplexed signal from an optical signal to an electrical signal.
- the plurality of radio access units 503-1 to 503-n separate the downlink multiplexed signal converted into the electric signal in units of frames, and use the separated downlink multiplexed signal in the first communication system of the single cell # 520. Up-conversion is performed so as to obtain an RF signal having a radio frequency that can be received by the terminal. Further, the plurality of radio access units 503-1 to 503-n wirelessly transmit an RF signal to a terminal using the first communication system of the single cell # 520. Further, the plurality of radio access units 503-1 to 503-n convert the separated downlink multiplexed signal into an IP signal, and convert the converted IP signal into the second cells of the corresponding multicells # 530-1 to # 530-n.
- the plurality of radio access units 503-1 to 503-n are RF signals transmitted from terminals using the first communication system of the single cell # 520 or the second signals of the multicells # 530-1 to # 530-n. An RF signal transmitted from a terminal using the communication system is received.
- the plurality of radio access units 503-1 to 503-n down-convert RF signals received from terminals using the first communication system of the single cell # 520.
- the plurality of wireless access units 503-1 to 503-n are wired after the RF signals received from the terminals using the second communication system of the multicells # 530-1 to # 530-n are processed by the wireless protocol signal. Protocol signal processing is performed to generate an IP signal.
- the plurality of radio access units 503-1 to 503-n frame-multiplexes the generated IP signal and the signal received from the terminal using the first communication system of the down-converted single cell # 520, and performs uplink multiplexing.
- a signal is generated, and the generated uplink multiplexed signal is converted from an electric signal to an optical signal.
- the plurality of radio access units 503-1 to 503-n convert the uplink multiplexed signal converted into the optical signal from the electric signal into the optical signal, and the uplink multiplexed signal converted into the optical signal is converted into the downlink multiplexed signal and the wavelength division multiplexing.
- To the main unit 502. Details of the configuration of the radio access units 503-1 to 503-n will be described later.
- FIG. 6 is a block diagram showing the configuration of the main unit 502.
- the main unit 502 includes a WDM coupler 601, an O / E converter 602, an E / O converter 603, a signal branching unit 604, signal converting units 605-1 to 605-n, and a frame multiplexing unit 606-1.
- 606-n, frame separation units 607-1 to 607-n, E / O converters 608-1 to 608-n, WDM couplers 609-1 to 609-n, and O / E converter 610- 1 to 610-n and a signal adder 611 are mainly configured.
- the REC interface unit 650 includes a WDM coupler 601, an O / E converter 602, and an E / O converter 603.
- the demultiplexing units 660-1 to 660-n include signal conversion units 605-1 to 605-n, frame multiplexing units 606-1 to 606-n, and frame demultiplexing units 607-1 to 607-n.
- the radio access unit interface units 670-1 to 670-n include E / O converters 608-1 to 608-n, WDM couplers 609-1 to 609-n, and O / E converters 610-1 to 610-n.
- REC means a device having a function of performing modulation and demodulation of a radio base station device defined by the CPRI specification.
- each configuration will be described in detail.
- the WDM coupler 601 separates the CPRI downlink signal from the multiplexed signal in which the CPRI downlink signal and the CPRI uplink signal input from the radio base station apparatus 501 are wavelength division multiplexed. Also, the WDM coupler 601 outputs the separated CPRI downlink signal to the O / E converter 602. Also, the WDM coupler 601 wavelength-division-multiplexes the CPRI uplink signal input from the E / O converter 603 with the CPRI downlink signal to generate a multiplexed signal, and outputs the generated multiplexed signal to the radio base station apparatus 501. .
- the O / E converter 602 converts the CPRI downlink signal input from the WDM coupler 601 from an optical signal to an electrical signal and outputs the signal to the signal branching unit 604.
- the E / O converter 603 converts the CPRI uplink signal input from the signal adder 611 from an electrical signal to an optical signal and outputs the converted signal to the WDM coupler 601.
- the signal branching unit 604 branches the CPRI downlink signal input from the O / E converter 602 into n CPRI downlink signals, and the branched CPRI downlink signals are frame multiplexing units 606-1 to 606-n. Output to.
- the signal converters 605-1 to 605-n convert the IP signal input from the router 106 into a pseudo IQ signal and output the pseudo IQ signal to the frame multiplexers 606-1 to 606-n.
- the pseudo IQ signal is continuous by inserting dummy bits so that the signal speed is equivalent to the IQ signal transmitted and received between the CPRI interfaces between the radio base station apparatus 501 and the REC interface unit 650. It is a signal that can be handled as a signal.
- the signal conversion units 605-1 to 605-n remove dummy bits from the pseudo IQ signals input from the frame separation units 607-1 to 607-n, convert them into IP signals, and output the IP signals to the router 106. To do.
- Frame multiplexing units 606-1 to 606-n are CPRI frame downlink signals obtained by frame multiplexing the CPRI downlink signal input from signal branching unit 604 and the pseudo IQ signal input from signal conversion units 605-1 to 605-n. Is generated.
- the CPRI frame downstream signal is a signal multiplexed on the CPRI format.
- the frame multiplexing units 606-1 to 606-n output the generated CPRI frame downlink signals to the E / O converters 608-1 to 608-n.
- the frame multiplexing units 606-1 to 606-n handle the input CPRI downlink signal and pseudo IQ signal as different antenna signals on the CPRI interface. The processing in the signal conversion units 605-1 to 605-n will be described later.
- Frame demultiplexing units 607-1 to 607-n receive IQ signals and pseudo IQ signals that handle CPRI frame uplink signals input from O / E converters 610-1 to 610-n as signals of different antennas on the CPRI interface. To separate. Also, the frame separation units 607-1 to 607-n output the separated IQ signal to the signal addition unit 611, and output the separated pseudo IQ signal to the signal conversion units 605-1 to 605-n.
- the E / O converters 608-1 to 608-n convert the CPRI frame downstream signal input from the frame multiplexing units 606-1 to 606-n from an electric signal to an optical signal and convert them to WDM couplers 609-1 to 609-n. Output to.
- the WDM couplers 609-1 to 609-n wavelength-division-multiplex the CPRI frame downstream signal input from the E / O converters 608-1 to 608-n with the CPRI frame upstream signal, and perform wireless access units 503-1 to Output to 503-n. Also, the WDM couplers 609-1 to 609-n separate the CPRI frame uplink signal from the multiplexed signal obtained by wavelength division multiplexing the CPRI frame downlink signal and the CPRI frame uplink signal, and the separated CPRI frame uplink signal is converted into the O / E. Output to converters 610-1 to 610-n.
- the O / E converters 610-1 to 610-n convert the CPRI frame uplink signal input from the WDM couplers 609-1 to 609-n from an optical signal to an electrical signal and convert the frame separation units 607-1 to 607-n. Output to.
- the signal adder 611 adds the n IQ signals input from the frame separators 607-1 to 607-n to generate a CPRI uplink signal.
- the signal adding unit 611 outputs the generated CPRI uplink signal to the E / O converter 603.
- FIG. 7 is a block diagram showing a configuration of the wireless access unit 503-1. Note that the configuration of the wireless access units 503-2 to 503-n is the same as that of the wireless access unit 503-1 in FIG.
- the radio access unit 503-1 includes a WDM coupler 701, an O / E converter 702, a frame separation unit 703, a TRX unit 704, a signal conversion unit 705, a radio base station function unit 706, and an AMP unit 707.
- the frame multiplex unit 708, the E / O converter 709, and antennas 710-1 and 710-2 are mainly configured. Hereinafter, each configuration will be described in detail.
- the WDM coupler 701 separates the CPRI frame downlink signal from the multiplexed signal in which the CPRI frame downlink signal and the CPRI frame uplink signal input from the main unit 502 are wavelength division multiplexed. Also, the WDM coupler 701 outputs the separated CPRI frame downlink signal to the O / E converter 702. Also, the WDM coupler 701 wavelength-division-multiplexes the CPRI frame uplink signal input from the E / O converter 709 with the CPRI frame downlink signal and outputs the result to the main unit 502.
- the O / E converter 702 converts the CPRI frame downstream signal input from the WDM coupler 701 from an optical signal to an electrical signal and outputs the converted signal to the frame separation unit 703.
- the frame separation unit 703 separates the CPRI frame downlink signal input from the O / E converter 702 into an IQ signal and a pseudo IQ signal that are handled as different antenna signals on the CPRI interface. Also, the frame separation unit 703 outputs the separated IQ signal to the TRX unit 704, and outputs the separated pseudo IQ signal to the signal conversion unit 705.
- the TRX unit 704 up-converts the IQ signal input from the frame separation unit 703 so as to become an RF signal of a predetermined radio frequency, and outputs it to the AMP unit 707.
- TRX section 704 generates an IQ signal by down-converting the RF signal input from AMP section 707, and outputs the generated IQ signal to frame multiplexing section 708.
- the signal conversion unit 705 removes dummy bits from the pseudo IQ signal input from the frame separation unit 703, converts the pseudo bit into an IP signal, and outputs the converted IP signal to the radio base station function unit 706. Further, the signal conversion unit 705 generates a pseudo IQ signal by inserting dummy bits into the IP signal input from the radio base station function unit 706, and outputs the generated pseudo IQ signal to the frame multiplexing unit 708.
- the radio base station function unit 706 performs a radio protocol signal process on the IP signal input from the signal conversion unit 705, and then outputs the signal to the AMP unit 707 as an LTE RF downlink signal. Also, the radio base station function unit 706 performs an LTE RF uplink signal input from the AMP unit 707, processes a radio protocol signal corresponding to LTE, performs a wired protocol signal process, and outputs the signal to the signal conversion unit 705 as an LTE IP signal. To do. For example, the radio base station function unit 706 outputs an LTE IP signal to the signal conversion unit 705 as an S1 interface signal. The radio base station function unit 706 outputs an Iuh interface signal in the case of a WCDMA uplink signal. The radio base station function unit 706 has the same function as a femtocell base station, for example.
- the AMP unit 707 amplifies the RF signal input from the TRX unit 704 and wirelessly transmits the signal from the antenna 710-1 to a terminal using the first communication system of the single cell # 520. Also, the AMP unit 707 amplifies the RF signal input from the radio base station function unit 706, and transmits the amplified RF signal from the antenna 710-2 to the terminal using the second communication system of the corresponding multicell # 530-1. Also, the AMP unit 707 receives from the terminal using the first communication system of the single cell # 520 or the terminal using the second communication system of the multicell # 530-1 via the antennas 710-1 and 710-2. The processed signal is amplified and filtered as necessary.
- the AMP unit 707 extracts a signal in a frequency band used in LTE of the single cell # 520 or a signal in a frequency band used in LTE of the multicell # 530-1. Also, the AMP unit 707 outputs the extracted LTE RF signal of the single cell # 520 to the TRX unit 704. Also, the AMP unit 707 outputs the extracted LTE RF signal of the multi-cell # 530-1 to the radio base station function unit 706.
- the antennas 710-1 and 710-2 may be used properly for each LTE, or may be shared by each LTE.
- the frame multiplexing unit 708 generates a CPRI frame uplink signal obtained by frame multiplexing the IQ signal input from the TRX unit 704 and the pseudo IQ signal input from the signal conversion unit 705.
- the CPRI frame uplink signal is a signal multiplexed on the CPRI format.
- the frame multiplexing unit 708 outputs the generated CPRI frame uplink signal to the E / O converter 709.
- the E / O converter 709 converts the CPRI frame uplink signal input from the frame multiplexing unit 708 from an electric signal to an optical signal and outputs the converted signal to the WDM coupler 701.
- the radio base station apparatus 501 converts the CPRI downlink signal acquired from the core network 103 from an electrical signal to an optical signal, and generates a multiplexed signal by wavelength division multiplexing the CPRI downlink signal and the CPRI uplink signal converted into the optical signal. .
- the radio base station apparatus 501 outputs the generated multiplexed signal to the main unit 502.
- the main unit 502 separates the CPRI downlink signal from the multiplexed signal input from the radio base station apparatus 501 and converts the separated CPRI downlink signal from an optical signal to an electrical signal.
- the main unit 502 branches the CPRI downlink signal converted into the electric signal into n CPRI downlink signals.
- the main unit 502 converts the IP signal input from the router 106 into a pseudo IQ signal.
- the main unit 502 frame-multiplexes n CPRI downlink signals and pseudo IQ signals to generate n CPRI frame downlink signals, and converts the generated CPRI frame downlink signals from electrical signals to optical signals. .
- the main unit 502 wavelength-division-multiplexes the CPRI downlink signal and the CPRI uplink signal converted into an optical signal to generate n multiplexed signals, and the generated n multiplexed signals are transmitted to each radio access unit 503- Output to 1 to 503-n.
- the radio access units 503-1 to 503-n separate the CPRI downlink signal from the multiplexed signal input from the main unit 502.
- the radio access units 503-1 to 503-n convert the separated CPRI downlink signal from an optical signal to an electric signal, and separate the converted CPRI downlink signal into an IQ signal and a pseudo IQ signal.
- radio access units 503-1 to 503-n upconvert IQ signals to generate RF signals, and wirelessly transmit the generated RF signals to terminals using the first communication system of single cell # 520. To do.
- the radio access units 503-1 to 503-n convert the pseudo IQ signal into an IP signal, and also convert the IP signal into an RF signal, so that the second multi-cell # 530-1 to # 530-n Wirelessly transmitted to a terminal using the communication system.
- Radio access units 503-1 to 503-n receive RF signals from terminals using the first communication system of single cell # 520, and the second communication system of multicells # 530-1 to # 530-n An RF signal is received from a terminal that uses.
- the radio access units 503-1 to 503-n downconvert the RF signal received from the terminal using the first communication system of the single cell # 520 to generate an IQ signal.
- the radio access units 503-1 to 503-n convert RF signals received from terminals using the second communication system of the multicells # 530-1 to # 530-n into IP signals and convert the IP signals. Convert to pseudo IQ signal.
- the radio access units 503-1 to 503-n generate a CPRI frame uplink signal obtained by frame multiplexing the IQ signal and the pseudo IQ signal, and convert the generated CPRI frame uplink signal from an electric signal to an optical signal.
- the CPRI frame upstream signal and the CPRI frame downstream signal converted into the optical signal are wavelength division multiplexed to generate a multiplexed signal, and the generated multiplexed signal is output to the main unit 502.
- the main unit 502 separates the CPRI frame uplink signal from the multiplexed signal input from each of the radio access units 503-1 to 503-n, and converts the separated CPRI frame uplink signal from an optical signal to an electrical signal.
- the main unit 502 separates the CPRI frame upstream signal converted into the electrical signal into an IQ signal and a pseudo IQ signal.
- the main unit 502 converts the separated pseudo IQ signal into an IP signal and outputs it to the router 106.
- the main unit 502 adds n separated IQ signals to generate an upstream CPRI signal, and converts the generated upstream CPRI signal from an electrical signal to an optical signal.
- the uplink CPRI signal converted into the optical signal and the downlink CPRI signal are wavelength division multiplexed to generate a multiplexed signal, and the generated multiplexed signal is output to the radio base station apparatus 501.
- FIG. 8 is a diagram illustrating a method for multiplexing CPRI frames.
- the frame multiplexing units 606-1 to 606-n and the frame multiplexing unit 708 handle the IQ signal as a signal of antenna # 0 (AC0) and the pseudo IQ signal as a signal of antenna # 1 (AC1). . Also, the frame multiplexing units 606-1 to 606-n and the frame multiplexing unit 708 generate the CPRI frame downlink signal and the CPRI frame uplink signal with AxC Containers # 0 to # 7 as one group.
- a CPRI format that transmits IQ signals for two antennas with one carrier frequency is used.
- a signal assigned to one of the two antennas is used for a radio signal transmitted to a terminal using the single-cell first communication system.
- a signal assigned to one of the two antennas is used for an IP signal transmitted to a terminal using the second multi-cell communication system.
- each wireless access unit it is not necessary to significantly change the existing system configuration by providing each wireless access unit with a wireless base station function unit that wirelessly transmits and receives LTE IP signals. It is possible to respond flexibly to changes. As a result, the cost associated with the introduction of the system can be reduced. Moreover, according to this Embodiment, since a single cell is comprised by several radio
- the communication system, main unit, radio access unit, and communication method according to the present invention are particularly suitable for making a space in a building or an underground shopping mall where a radio signal from a radio base station installed outdoors does not reach a serviceable area. It is.
Abstract
Description
図2は、本発明の実施の形態1に係る通信システム100の構成を示す図である。
図5は、本発明の実施の形態2に係る通信システム500の構成を示す図である。
102 無線基地局装置
103 コアネットワーク
104、105 終端装置
106 ルータ
107 メインユニット
108-1~108-n 無線アクセスユニット
#120 シングルセル
#130-1~#130-n マルチセル
Claims (20)
- 無線基地局装置と、前記無線基地局装置及びネットワークに接続されるメインユニットと、前記メインユニットに接続される複数の無線アクセスユニットとを具備する通信システムであって、
前記無線基地局装置は、第1の通信システムの下り信号を前記メインユニットに出力し、
前記メインユニットは、前記無線基地局装置から入力した前記第1の通信システムの下り信号と、前記ネットワークから入力した第2の通信システムの下り信号とを前記複数の無線アクセスユニットの各々に出力し、
前記複数の無線アクセスユニットは、前記第1の通信システムのシングルセルを構成するとともに、各々が前記シングルセル内に個別に前記第2の通信システムのマルチセルを構成し、前記メインユニットから入力した前記第1の通信システムの下り信号を前記シングルセルの前記第1の通信システムを利用する端末に送信するとともに、前記メインユニットから入力した前記第2の通信システムの下り信号を、有線プロトコル信号処理した後に無線プロトコル信号処理して前記マルチセルの前記第2の通信システムを利用する端末に各々送信する通信システム。 - 前記メインユニットは、光伝送路を介して前記複数の無線アクセスユニットに接続し、前記第1の通信システムの下り信号と前記第2の通信システムの下り信号とを波長分割多重した多重信号を前記光伝送路により前記複数の無線アクセスユニットの各々に出力し、
前記複数の無線アクセスユニットは、前記メインユニットから前記光伝送路を介して入力した前記多重信号から前記第1の通信システムの下り信号と前記第2の通信システムの下り信号とを分離し、分離した前記第1の通信システムの下り信号を前記シングルセルの前記第1の通信システムを利用する端末に送信するとともに、分離した前記第2の通信システムの下り信号を、前記有線プロトコル信号処理した後に前記無線プロトコル信号処理する請求項1記載の通信システム。 - 前記無線基地局装置は、第1の光伝送路を介して前記メインユニットに接続し、前記第1の通信システムの下り信号を、前記第1の通信システムの上り信号と波長分割多重して、前記第1の光伝送路を介して前記メインユニットに出力し、
前記メインユニットは、第2の光伝送路を介して前記複数の無線アクセスユニットと接続し、前記第1の光伝送路を介して入力した前記第1の通信システムの下り信号と、前記第2の通信システムの下り信号とをフレーム多重した第1の多重信号を、前記第1の通信システムの上り信号と前記第2の通信システムの上り信号とをフレーム多重した第2の多重信号と波長分割多重して、前記第2の光伝送路を介して前記複数の無線アクセスユニットの各々に出力し、
前記複数の無線アクセスユニットは、前記第2の光伝送路を介して入力した前記第1の多重信号から、前記第1の通信システムの下り信号と前記第2の通信システムの下り信号とをフレーム単位で分離するとともに、分離した前記第1の通信システムの下り信号を前記シングルセルの前記第1の通信システムを利用する端末に送信し、分離した前記第2の通信システムの下り信号を、前記有線プロトコル信号処理した後に前記無線プロトコル信号処理する請求項1記載の通信システム。 - 無線基地局装置と、前記無線基地局装置及びネットワークに接続されるメインユニットと、前記メインユニットに接続される複数の無線アクセスユニットとを具備する通信システムであって、
前記複数の無線アクセスユニットは、第1の通信システムのシングルセルを構成するとともに各々が前記シングルセル内に個別に第2の通信システムのマルチセルを構成し、前記シングルセルの前記第1の通信システムを利用する端末から受信した第1の通信システムの上り信号を前記メインユニットに出力するとともに、前記マルチセルの前記第2の通信システムを利用する端末から受信した第2の通信システムの上り信号を、無線プロトコル信号処理した後に有線プロトコル信号処理して前記メインユニットに出力し、
前記メインユニットは、前記複数の無線アクセスユニットから入力した前記第1の通信システムの上り信号を合成して前記無線基地局装置に出力するとともに、前記複数の無線アクセスユニットから入力した前記第2の通信システムの上り信号を前記ネットワークに出力し、
前記無線基地局装置は、合成した前記第1の通信システムの上り信号を前記メインユニットから取得する通信システム。 - 前記複数の無線アクセスユニットは、光伝送路を介して前記メインユニットに接続し、前記第1の通信システムを利用する端末から受信した前記第1の通信システムの上り信号と、前記有線プロトコル信号処理した前記第2の通信システムの上り信号とを波長分割多重した多重信号を、前記光伝送路を介して前記メインユニットに出力し、
前記メインユニットは、前記光伝送路を介して入力した前記多重信号から前記第1の通信システムの上り信号と前記第2の通信システムの上り信号とを分離し、分離した前記第1の通信システムの上り信号を合成して前記無線基地局装置に出力するとともに、分離した前記第2の通信システムの上り信号を前記ネットワークに出力する請求項4記載の通信システム。 - 前記複数の無線アクセスユニットは、第1の光伝送路を介して前記メインユニットと接続し、前記第1の通信システムを利用する端末から受信した前記第1の通信システムの上り信号と、前記有線プロトコル信号処理した前記第2の通信システムの上り信号とをフレーム多重した第1の多重信号を、前記第1の通信システムの下り信号と前記第2の通信システムの下り信号とをフレーム多重した第2の多重信号と波長分割多重して前記メインユニットに出力し、
前記メインユニットは、第2の光伝送路を介して前記無線基地局装置に接続し、前記第1の光伝送路を介して前記複数の無線アクセスユニットから入力した前記第1の多重信号を、前記第1の通信システムの上り信号と前記第2の通信システムの上り信号とにフレーム単位で各々分離し、分離した各々の前記第1の通信システムの上り信号を加算するとともに、加算した前記第1の通信システムの上り信号を、前記第1の通信システムの下り信号と波長分割多重して、前記第2の光伝送路を介して前記無線基地局装置に出力し、
前記無線基地局装置は、前記第2の光伝送路を介して前記第1の通信システムの上り信号を前記メインユニットから取得する請求項4記載の通信システム。 - 入力した第1の通信システムの下り信号を複数の前記第1の通信システムの下り信号に分配する分配手段と、
前記分配手段により分配した各々の前記第1の通信システムの下り信号と、入力した第2の通信システムの下り信号とを各々多重して第1の多重信号を生成して出力する多重手段と、
を具備するメインユニット。 - 前記分配手段により分配した各々の前記第1の通信システムの下り信号と、入力した前記第2の通信システムの下り信号とを電気信号から光信号に変換する変換手段をさらに具備し、
前記多重手段は、前記変換手段により光信号に変換した前記第1の通信システムの下り信号と前記第2の通信システムの下り信号とを各々波長分割多重して前記第1の多重信号を生成する請求項7記載のメインユニット。 - 前記第1の通信システムの下り信号と前記第1の通信システムの上り信号とが波長分割多重された第2の多重信号から、前記第1の通信システムの下り信号を分離する分離手段と、
前記分離手段により分離した前記第1の通信システムの下り信号を光信号から電気信号に変換する変換手段と、
入力した前記第2の通信システムの下り信号にダミービットを挿入する信号変換手段とをさらに具備し、
前記分配手段は、前記変換手段により電気信号に変換した前記第1の通信システムの下り信号を複数の前記第1の通信システムの下り信号に分配し、
前記多重手段は、分配した前記第1の通信システムの下り信号と、前記ダミービットを挿入した前記第2の通信システムの下り信号とを各々フレーム多重した前記第1の多重信号を、前記第1の通信システムの上り信号と前記第2の通信システムの上り信号とを多重した第3の多重信号と波長分割多重して出力する請求項7記載のメインユニット。 - 第1の通信システムの上り信号と第2の通信システムの上り信号とが多重された複数の第1の多重信号を取得し、取得した前記第1の多重信号を前記第1の通信システムの上り信号と前記第2の通信システムの上り信号とに各々分離するとともに、分離した前記第2の通信システムの上り信号を出力する分離手段と、
前記分離手段により分離した各々の前記第1の通信システムの上り信号を合成して出力する合成手段と、
を具備するメインユニット。 - 前記分離手段により分離した前記第1の通信システムの上り信号と前記第2の通信システムの上り信号とを光信号から電気信号に変換する変換手段をさらに具備し、
前記分離手段は、波長分割多重された複数の前記第1の多重信号を取得し、
前記合成手段は、前記変換手段により電気信号に変換した各々の前記第1の通信システムの上り信号を合成する請求項10記載のメインユニット。 - 前記分離手段により分離した前記第2の通信システムの上り信号からダミービットを除去して前記第2の通信システムの上り信号を出力する信号変換手段と、
前記合成手段により合成した前記第1の通信システムの上り信号を電気信号から光信号に変換する変換手段と、
前記変換手段により光信号に変換した前記第1の通信システムの上り信号を、前記第1の通信システムの下り信号と波長分割多重して出力する多重手段とをさらに具備し、
前記分離手段は、前記第1の通信システムの下り信号と前記第2の通信システムの下り信号とをフレーム多重した第2の多重信号と波長分割多重した前記第1の多重信号を取得し、取得した前記第1の多重信号を前記第1の通信システムの上り信号と前記第2の通信システムの上り信号とにフレーム単位で分離する請求項10記載のメインユニット。 - 第1の通信システムの下り信号と第2の通信システムの下り信号とを取得する取得手段と、
前記取得手段により取得した前記第2の通信システムの下り信号を、有線プロトコル信号処理した後に無線プロトコル信号処理するプロトコル処理手段と、
前記取得手段により取得した前記第1の通信システムの下り信号を、他の無線アクセスユニットと共に構成した前記第1の通信システムのシングルセルの前記第1の通信システムを利用する端末に送信するとともに、前記プロトコル処理手段により前記無線プロトコル信号処理した前記第2の通信システムの下り信号を、前記シングルセル内に構成した前記第2の通信システムのマルチセルの前記第2の通信システムを利用する端末に送信する送信手段と、
を具備する無線アクセスユニット。 - 前記取得手段により取得した前記第1の通信システムの下り信号と前記第2の通信システムの下り信号とを光信号から電気信号に変換する変換手段をさらに具備し、
前記取得手段は、前記第1の通信システムの下り信号と前記第2の通信システムの下り信号とが波長分割多重された多重信号から、前記第1の通信システムの下り信号と前記第2の通信システムの下り信号とを分離し、
前記プロトコル処理手段は、前記変換手段により電気信号に変換した前記第2の通信システムの下り信号を、前記有線プロトコル信号処理した後に前記無線プロトコル信号処理し、
前記送信手段は、前記変換手段により電気信号に変換した前記第1の通信システムの下り信号を前記シングルセルの前記第1の通信システムを利用する端末に送信するとともに、前記プロトコル処理手段により前記無線プロトコル信号処理した前記第2の通信システムの下り信号を前記マルチセルの前記第2の通信システムを利用する端末に送信する請求項13記載の無線アクセスユニット。 - 前記取得手段により取得した、前記第1の通信システムの下り信号と前記第2の通信システムの下り信号とをフレーム多重した第1の多重信号を光信号から電気信号に変換する変換手段と、
前記変換手段により電気信号に変換した前記第1の多重信号を前記第1の通信システムの下り信号と前記第2の通信システムの下り信号とにフレーム単位で分離する分離手段と、
前記分離手段により分離した前記第2の通信システムの下り信号からダミービットを除去する信号変換手段とをさらに具備し、
前記取得手段は、前記第1の通信システムの上り信号と前記第2の通信システムの上り信号とをフレーム多重した第2の多重信号と波長分割多重された前記第1の多重信号を取得し、
前記プロトコル処理手段は、前記信号変換手段により前記ダミービットを除去した前記第2の通信システムの下り信号を、前記有線プロトコル信号処理した後に前記無線プロトコル信号処理する請求項13記載の無線アクセスユニット。 - 他の無線アクセスユニットと共に構成した第1の通信システムのシングルセルの前記第1の通信システムを利用する端末から前記第1の通信システムの上り信号を受信するとともに、前記シングルセル内に構成した第2の通信システムのマルチセルの前記第2の通信システムを利用する端末から前記第2の通信システムの上り信号を受信する受信手段と、
前記受信手段により受信した前記第2の通信システムの上り信号を、無線プロトコル信号処理した後に有線プロトコル信号処理するプロトコル処理手段と、
前記受信手段により受信した前記第1の通信システムの上り信号と前記プロトコル処理手段により前記有線プロトコル信号処理した前記第2の通信システムの上り信号とを出力する出力手段と、
を具備する無線アクセスユニット。 - 前記受信手段により受信した前記第1の通信システムの上り信号と、前記プロトコル処理手段により前記有線プロトコル信号処理した前記第2の通信システムの上り信号とを電気信号から光信号に変換する変換手段をさらに具備し、
前記出力手段は、前記変換手段により光信号に変換した前記第1の通信システムの上り信号と前記第2の通信システムの上り信号とを波長分割多重して出力する請求項16記載の無線アクセスユニット。 - 前記プロトコル処理手段により前記有線プロトコル信号処理した前記第2の通信システムの上り信号にダミービットを挿入する信号変換手段と、
前記受信手段により受信した前記第1の通信システムの上り信号と、前記ダミービットを挿入した前記第2の通信システムの上り信号とをフレーム多重した第1の多重信号を生成する多重手段と、
前記第1の多重信号を電気信号から光信号に変換する変換手段とをさらに具備し、
前記出力手段は、前記変換手段により光信号に変換した前記第1の多重信号を、前記第1の通信システムの下り信号と前記第2の通信システムの下り信号とをフレーム多重した第2の多重信号と波長分割多重して出力する請求項16記載の無線アクセスユニット。 - 無線基地局装置と、前記無線基地局装置及びネットワークに接続されるメインユニットと、前記メインユニットに接続される複数の無線アクセスユニットとを具備する通信システムにおける通信方法であって、
前記無線基地局装置が、第1の通信システムの下り信号を前記メインユニットに出力するステップと、
前記メインユニットが、前記無線基地局装置から入力した前記第1の通信システムの下り信号と、前記ネットワークから入力した第2の通信システムの下り信号とを前記複数の無線アクセスユニットの各々に出力するステップと、
前記複数の無線アクセスユニットが、前記第1の通信システムのシングルセルを構成するとともに、各々が前記シングルセル内に個別に前記第2の通信システムのマルチセルを構成し、前記メインユニットから入力した前記第1の通信システムの下り信号を前記シングルセルの前記第1の通信システムを利用する端末に送信するとともに、前記メインユニットから入力した前記第2の通信システムの下り信号を、有線プロトコル信号処理した後に無線プロトコル信号処理して前記マルチセルの前記第2の通信システムを利用する端末に各々送信するステップと、
を具備する通信方法。 - 無線基地局装置と、前記無線基地局装置及びネットワークに接続されるメインユニットと、前記メインユニットに接続される複数の無線アクセスユニットとを具備する通信システムにおける通信方法であって、
前記複数の無線アクセスユニットが、第1の通信システムのシングルセルを構成するとともに各々が前記シングルセル内に個別に第2の通信システムのマルチセルを構成し、前記シングルセルの前記第1の通信システムを利用する端末から受信した第1の通信システムの上り信号を前記メインユニットに出力するとともに、前記マルチセルの前記第2の通信システムを利用する端末から受信した第2の通信システムの上り信号を、無線プロトコル信号処理した後に有線プロトコル信号処理して前記メインユニットに出力するステップと、
前記メインユニットが、前記複数の無線アクセスユニットから入力した前記第1の通信システムの上り信号を合成して前記無線基地局装置に出力するとともに、前記複数の無線アクセスユニットから入力した前記第2の通信システムの上り信号を前記ネットワークに出力するステップと、
前記無線基地局装置が、合成した前記第1の通信システムの上り信号を前記メインユニットから取得するステップと、
を具備する通信方法。
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Also Published As
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US9485023B2 (en) | 2016-11-01 |
JP2011228853A (ja) | 2011-11-10 |
US20150236786A1 (en) | 2015-08-20 |
BR112012022510A2 (pt) | 2019-09-24 |
US20130004176A1 (en) | 2013-01-03 |
JP5373690B2 (ja) | 2013-12-18 |
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