WO2021129662A1 - Système de combinaison das - Google Patents

Système de combinaison das Download PDF

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Publication number
WO2021129662A1
WO2021129662A1 PCT/CN2020/138626 CN2020138626W WO2021129662A1 WO 2021129662 A1 WO2021129662 A1 WO 2021129662A1 CN 2020138626 W CN2020138626 W CN 2020138626W WO 2021129662 A1 WO2021129662 A1 WO 2021129662A1
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WO
WIPO (PCT)
Prior art keywords
frequency band
band signal
port
frequency
amplifying device
Prior art date
Application number
PCT/CN2020/138626
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English (en)
Chinese (zh)
Inventor
徐慧俊
卜斌龙
曾晓松
李学锋
邓海龙
黄小锋
Original Assignee
京信网络系统股份有限公司
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Publication date
Application filed by 京信网络系统股份有限公司 filed Critical 京信网络系统股份有限公司
Publication of WO2021129662A1 publication Critical patent/WO2021129662A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15507—Relay station based processing for cell extension or control of coverage area
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
    • H04B7/15535—Control of relay amplifier gain

Definitions

  • This application relates to the field of communication technology, and in particular to a DAS combination system.
  • the DAS Distributed Antenna System
  • the combiner used with the DAS system is indispensable. Therefore, the design of the combined scheme is particularly important. .
  • the inventor found that there are at least the following problems in the traditional technology: In the mobile communication DAS system, when the link frequency band is connected, it is necessary to design a 3dB bridge in the combiner to achieve the combining function, resulting in insertion loss Large, small isolation between frequency bands.
  • an embodiment of the present application provides a DAS combination system, including:
  • the combiner port is used to connect the antenna.
  • the first radio frequency amplifying device is used to transmit a first frequency band signal through the first port of the combiner; the first frequency band signal includes a B1 frequency band signal and a B2 frequency band signal connected to the frequency bands.
  • the second radio frequency amplifying device is used to transmit the second frequency band signal through the second port of the combiner; there is an interval frequency between the second frequency band signal and the first frequency band signal; the second radio frequency amplifying device is also used to pass the first port or The first radio frequency amplifying device acquires the B2 frequency band signal.
  • the first radio frequency amplifying device when the second radio frequency amplifying device is disconnected from the second port and the first radio frequency amplifying device is connected to the first port, the first radio frequency amplifying device closes the transmission of the B2 frequency band signal.
  • the first radio frequency amplifying device includes a duplex port for connecting to the first port; the second radio frequency amplifying device includes a duplex port for connecting to the second port.
  • the second radio frequency amplifying device includes an uplink filtering port.
  • the upstream filter port is connected to the first port.
  • the upstream filter port is used to connect the load.
  • the first frequency band signal further includes an A frequency band signal; the A frequency band signal is separated from the frequency bands of the B1 frequency band signal and the B2 frequency band signal, respectively.
  • the frequency band of the A-band signal is 617 MHz to 652 MHz.
  • the frequency band of the B1 band signal is 663MHz to 698MHz.
  • the frequency band of the B2 band signal is 698MHz to 716MHz.
  • the frequency band of the second frequency band signal is above 728MHz.
  • the second frequency band signal includes a C-band signal and a D-band signal whose frequency bands are spaced apart; the C-band signal includes a C1 frequency band signal and a C2 frequency band signal that are connected by frequency bands.
  • the frequency band of the C1 frequency band signal is 728 MHz to 746 MHz.
  • the frequency band of the C2 band signal is 746MHz to 768MHz.
  • the frequency band of the D-band signal is 776MHz to 796MHz.
  • the first radio frequency amplifying device is a repeater or RRU.
  • the second radio frequency amplifying device is a repeater or RRU.
  • the first radio frequency amplifying device can cooperate with the first port of the combiner to transmit the first frequency band signal to realize the uplink and downlink transmission of the first radio frequency amplifying device; and the first radio frequency amplifying device can also combine Among the first frequency band signals, the B2 frequency band signal connected to the frequency band of the B1 frequency band signal is sent to the second radio frequency amplifying device.
  • the second radio frequency amplifying device can cooperate with the second port of the combiner to transmit a second frequency band signal with a frequency separated from the first frequency band signal to realize the uplink and downlink transmission of the second radio frequency amplifying device.
  • Figure 1 is a schematic diagram of the frequency bands of Band600, Band700L and Band700U;
  • Figure 2 is a schematic diagram of the traditional technology combination
  • Figure 3 is a first schematic structural diagram of a DAS combination system in an embodiment
  • Figure 4 is a second schematic structural diagram of the DAS combination system in an embodiment
  • Figure 5 is a third schematic structural diagram of the DAS combination system in an embodiment
  • Fig. 6 is a fourth schematic structural diagram of the DAS combination system in an embodiment
  • Fig. 7 is a fifth schematic structural diagram of the DAS combination system in an embodiment.
  • a DAS combining system is provided, as shown in FIG. 3, including:
  • the combiner port is used to connect the antenna
  • the first radio frequency amplifying device is configured to transmit a first frequency band signal through the first port of the combiner;
  • the first frequency band signal includes a B1 frequency band signal and a B2 frequency band signal connected by frequency bands;
  • the second radio frequency amplifying device is used to transmit the second frequency band signal through the second port of the combiner; there is an interval frequency between the second frequency band signal and the first frequency band signal; the second radio frequency amplifying device is also used to pass the first port or The first radio frequency amplifying device acquires the B2 frequency band signal.
  • the DAS combining system includes a combiner, a first radio frequency amplifying device, and a second radio frequency amplifying device.
  • the first radio frequency amplifying device can be connected to the first port of the combiner to transmit the first frequency band signal through the first port to realize uplink and downlink transmission, for example, to realize the uplink and downlink communication of the first standard signal;
  • the second radio frequency amplifying device It can be connected to the second port of the combiner to transmit the second frequency band signal through the second port to realize uplink and downlink transmission, for example, to realize the uplink and downlink communication of the second standard signal;
  • the first frequency band signal and the second frequency band There is an interval frequency between the signals. That is, the frequency bands corresponding to the two ports of the combiner have a certain frequency interval, which can improve the isolation between the ports.
  • the first frequency band signal may include two standard signals connected to the frequency bands, such as a B1 frequency band signal and a B2 frequency band signal connected to the frequency bands; for example, the first radio frequency amplifying device may transmit the B2 frequency band signal to the second frequency band after filtering. 2.
  • the radio frequency amplification device, or the second radio frequency amplification device filters the signal transmitted by the first radio frequency amplification device to obtain a B2 frequency band signal. Based on this, the second radio frequency amplification device can also realize the uplink and downlink communication of the third standard signal based on the B2 frequency band signal and the second frequency band signal.
  • both the first radio frequency amplifying device and the second radio frequency amplifying device can transmit signals of two standards, and can be transmitted to the subsequent device through corresponding filtering operations.
  • the first radio frequency amplifying device transmits the first standard signal to The first baseband processing unit; the first radio frequency amplifying device transmits the second-standard signal to the second radio frequency amplifying device through filtering; the second radio frequency amplifying device transmits the second-standard signal to the second baseband unit through filtering; the second radio frequency amplifying device
  • the third standard signal is transmitted to the third baseband unit etc. through filtering.
  • the second radio frequency amplification device can also obtain the B2 band signal from the first port through filtering; that is, the second radio frequency amplification device can set the corresponding filter
  • the circuit is used to connect different devices to obtain the B2 frequency band signal.
  • the specific filtering design and transmission can be realized by using existing devices or circuits, which are not specifically limited here.
  • the combiner includes at least two branch ports, one of which is used to transmit signals in the first frequency band, and the other is used to transmit signals in the second frequency band; the combiner port of the combiner can be used to transmit signals in the first frequency band and signals in the second frequency band .
  • Both the first radio frequency amplifying device and the second radio frequency amplifying device are used to amplify and transmit radio frequency signals, and can respectively correspond to signals of different frequency bands; for example, the radio frequency amplifying device can be a repeater, RRU (Remote Radio Unit, radio frequency The remote unit), etc., are not specifically limited here. It should be noted that the first radio frequency amplifying device and the second radio frequency amplifying device can be connected to the combiner separately, or can be connected to the combiner at the same time, which facilitates the flexible setting of the DAS system.
  • the filter design inside the combiner can further improve the isolation between the ports.
  • the first radio frequency amplifying device closes the transmission of the B2 frequency band signal .
  • the first radio frequency amplifying device can disconnect the transmission of the B2 frequency band signal, for example, the first radio frequency amplifier
  • the device does not receive the B2 frequency band signal transmitted by the first port, or stops sending the B2 frequency band signal to the second radio frequency amplification device.
  • the embodiment of the present application can stop the transmission of B2 frequency band signals when the first radio frequency amplifying device is connected to the combiner, but the second radio frequency amplifying device is not connected to the combiner, so as to meet the flexible configuration and configuration of the DAS combiner system. Reduce system power consumption.
  • the first radio frequency amplification device includes a duplex port for connecting to the first port.
  • the duplex port of the first radio frequency amplification device can be connected to the first port. Based on this, the first radio frequency amplification device can transmit the downlink signal in the first frequency band signal to the combiner through the duplex port and the first port in sequence; the combiner may sequentially pass through the first port and the duplex port, The uplink signal in the first frequency band signal is transmitted to the first radio frequency amplifying device.
  • both the B1 frequency band signal and the B2 frequency band signal are uplink signals; the B1 frequency band signal belongs to the first standard signal, and the first radio frequency amplification device can further transmit the B1 frequency band signal to the first baseband unit; the B2 frequency band signal belongs to the first baseband unit.
  • the first radio frequency amplifier device can further transmit the B2 frequency band signal to the second radio frequency amplifier device, and the second radio frequency amplifier device transmits it to the second baseband unit.
  • the second radio frequency amplification device includes a duplex port for connecting to the second port.
  • the duplex port of the second radio frequency amplification device can be connected to the second port.
  • the second radio frequency amplifying device can transmit the downlink signal in the second frequency band signal to the combiner through the duplex port and the second port in sequence; the combiner may sequentially pass through the second port and the duplex port,
  • the uplink signal in the second frequency band signal is transmitted to the second radio frequency amplifying device.
  • the first radio frequency amplification device may further transmit the uplink signal in the second frequency band signal to the third baseband unit.
  • the embodiment of the present application can realize the uplink and downlink transmission of the first radio frequency amplifying device, the second radio frequency amplifying device, and the combiner through a simple structure, and there is an interval frequency between the two branch ports of the combiner. There is no need to add a 3dB bridge for isolation design, and the insertion loss is very small.
  • the second radio frequency amplifying device includes an uplink filtering port.
  • the upstream filter port is connected to the first port.
  • the upstream filter port is used to connect the load.
  • the second radio frequency amplification device may obtain the B2 frequency band signal from the first port through the upstream filter port.
  • the second radio frequency amplifying device when the first radio frequency amplifying device is not connected to the first port, the second radio frequency amplifying device is connected to the first port through the uplink filtering port, and filtering is used to obtain the B2 frequency band signal from the first frequency band signal transmitted by the first port; when When the first radio frequency amplifying device is connected to the first port, the second radio frequency amplifying device can obtain the B2 frequency band signal through the first radio frequency amplifying device, and the upstream filter port can be connected to the load.
  • the embodiment of the present application facilitates the independent use of the second radio frequency amplifying device. In the case that the first radio frequency amplifying device is disconnected from the combiner, it can still complete the signal transmission of at least two standards, which improves the DAS combination. The flexibility of the road system.
  • the first frequency band signal further includes an A frequency band signal; the A frequency band signal is separated from the frequency bands of the B1 frequency band signal and the B2 frequency band signal.
  • the first frequency band signal also includes an A frequency band signal that is evenly spaced from the frequency bands of the B1 frequency band signal and the B2 frequency band signal.
  • the A band signal can be used as a downlink signal
  • the B1 band signal can be used as an uplink signal.
  • the two constitute the first standard signal; at the same time, the B2 band signal can be used as the second standard signal and can be used together with the B1 band signal , All are transmitted by the first port, and the second port transmits signals in the second frequency band. That is, for the connected frequency band, the combiner avoids the 3dB bridge design and reduces the insertion loss.
  • the port frequency band has a certain frequency interval, which can realize the design of high port isolation.
  • the frequency band of the A-band signal is 617 MHz to 652 MHz.
  • the frequency band of the B1 frequency band signal is 663 MHz to 698 MHz.
  • the A frequency band signal and the B1 frequency band signal can constitute a Band600 standard signal.
  • the frequency band of the B2 frequency band signal is 698 MHz to 716 MHz.
  • the frequency band of the second frequency band signal is above 728 MHz.
  • the B2 frequency band signal and the second frequency band signal can constitute a Band700L standard signal.
  • the second frequency band signal includes a C-band signal and a D-band signal whose frequency bands are spaced apart; the C-band signal includes a C1 frequency band signal and a C2 frequency band signal that are connected by frequency bands.
  • the C1 frequency band signal can be used as the downlink signal
  • the B2 frequency band signal can be used as the uplink signal
  • the C2 frequency band signal can be used as the downlink signal
  • the frequency band signal can be used as an uplink signal, and the two constitute the signal of the third standard; that is, the partial signal of the second standard and the signal of the third standard can share the second port of the combiner.
  • the frequency band of the C1 frequency band signal is 728 MHz to 746 MHz.
  • the B2 frequency band signal and the C1 frequency band signal can form Band700L standard signals.
  • the frequency band of the C2 band signal is 746 MHz to 768 MHz.
  • the frequency band of the D-band signal is 776 MHz to 796 MHz.
  • C2 band signals and D band signals can form Band700U standard signals.
  • the first radio frequency amplifying device is a repeater or RRU.
  • the second radio frequency amplifying device is a repeater or RRU.
  • a DAS combining system including a combiner, a Band600 device, and a Band700L+Band700U device.
  • the uplink of the Band600 device is designed as the B frequency band, including the Band600+Band700L uplink; the downlink is designed as the A frequency band, including only the Band600 downlink. Furthermore, the Band600 device has only one duplex port.
  • Band700L+Band700U equipment is designed as C-band, including Band700L+Band700U downlink; the uplink is designed as B2 and D-band, respectively, including Band700L uplink and Band700U uplink. Further, Band700L+Band700U equipment includes a duplex port and a Band700L upstream filter port.
  • the combiner contains 3 ports, among which port 1 contains A band and B band; port 2 contains C band and D band; port 3 is a combiner port, including A band, B band, C band and D band. Among them, there is a certain frequency interval between the frequency bands of port 1 and port 2, which can realize the design of high port isolation.
  • Band600, Band700L+Band700U equipment is connected to the combiner, because there is a certain frequency interval between the frequency bands, there is no need to increase the 3dB bridge for isolation design, and the insertion loss is very small; secondly, the filter design inside the combiner improves Isolation between ports.
  • Port 1 contains the A and B frequency bands, which correspond to the downlink and uplink of Band600 devices, respectively.
  • the Band600 device can turn off the B2 frequency band corresponding to the Band700L uplink.
  • the duplex port is connected to port 2 of the combiner.
  • Port 2 contains the C and D frequency bands, corresponding to the downlink of Band700L+Band700U equipment and the uplink of Band700U, respectively.
  • the uplink filter port is connected to the combiner port 1, corresponding to the B2 frequency band of the Band700L uplink.
  • the duplex port of the Band600 device is connected to the combiner port 1.
  • Port 1 contains the A and B frequency bands, which correspond to the downlink and uplink of the Band600 device respectively; +Band700U equipment duplex port connects to combiner port 2, and upstream filter port connects to load.
  • Port 2 contains the C and D frequency bands, corresponding to the downlink of Band700L+Band700U equipment and the uplink of Band700U, respectively.
  • the Band600 device opens the B2 frequency band corresponding to the Band700L uplink, and the Band700L uplink can be implemented through port 1 where the Band600 device is connected.

Abstract

La présente demande concerne un système de combinaison DAS. Un premier dispositif d'amplification radiofréquence peut être couplé à un premier port d'un multiplexeur, et est utilisé pour émettre un premier signal de bande de fréquences afin de réaliser une transmission de liaison montante et de liaison descendante du premier dispositif d'amplification radiofréquence ; et le premier dispositif d'amplification radiofréquence peut également envoyer un signal de bande de fréquences B2, qui est connecté à un signal de bande de fréquences B1, dans le premier signal de bande de fréquences à un second dispositif d'amplification radiofréquence. Le second dispositif d'amplification radiofréquence peut être mis en correspondance avec un second port du multiplexeur, et est utilisé pour émettre un second signal de bande de fréquences, une fréquence d'intervalle se trouvant entre le second signal de bande de fréquences et le premier signal de bande de fréquences, afin de réaliser une transmission de liaison montante et de liaison descendante du second dispositif d'amplification radiofréquence. Sur cette base, des ports du multiplexeur sont conçus en prenant des bandes de fréquences connectées toutes ensemble, au lieu de concevoir des ports de multiplexeur pour des bandes de fréquences correspondantes selon chaque bande de fréquences, ce qui permet d'éviter l'utilisation d'un pont 3 dB pour réaliser la combinaison des bandes de fréquences connectées, de telle sorte que la perte d'insertion peut être réduite et l'isolation entre les bandes de fréquences peut être améliorée.
PCT/CN2020/138626 2019-12-23 2020-12-23 Système de combinaison das WO2021129662A1 (fr)

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CN201911336499.2 2019-12-23
CN201911336499.2A CN111147119B (zh) 2019-12-23 2019-12-23 Das合路系统

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