CN112003641B - Radio frequency amplification device and network side equipment - Google Patents
Radio frequency amplification device and network side equipment Download PDFInfo
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- CN112003641B CN112003641B CN201910445974.3A CN201910445974A CN112003641B CN 112003641 B CN112003641 B CN 112003641B CN 201910445974 A CN201910445974 A CN 201910445974A CN 112003641 B CN112003641 B CN 112003641B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
- H04B7/15542—Selecting at relay station its transmit and receive resources
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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
- H04L5/0078—Timing of allocation
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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
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
- H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention provides a radio frequency amplification device and network side equipment, the device includes: the radio frequency unit is used for outputting a high-frequency signal, and the high-frequency signal carries an uplink and downlink time slot switching reference signal configured at the switching position of an uplink transmission time slot and a downlink transmission time slot; the input end of the power divider is connected with the output end of the radio frequency unit; the output of ware is divided to the merit and the input of amplifying unit is connected to the amplifying unit, and the amplifying unit includes: the directional coupler, the power detector and the uplink and downlink transceiving switches; the high-frequency signal output by the radio frequency unit is transmitted to the directional coupler, and the directional coupler couples the obtained first coupling signal and the second coupling signal; the first coupling signal is transmitted to a first input end of the uplink and downlink transceiving switch; the second coupling signal is transmitted to the power detector, the power detector demodulates the second coupling signal to obtain a control signal of the uplink and downlink transceiving switch, and the control signal is transmitted to a second input end of the uplink and downlink transceiving switch.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a radio frequency amplification apparatus and a network side device.
Background
Radio frequency amplification devices (such as repeaters) supporting a TDD (Time Division duplex) system all need an uplink and downlink synchronization signal to control a transceiver switch, and two schemes are mainly adopted in the prior art. Scheme 1: the uplink and downlink time slots are demodulated by a modem to control the transmit-receive switch. Scheme 2: a radio frequency power detector is adopted to detect the uplink and downlink switching time from the envelope signal of the radio frequency signal so as to control the receiving and transmitting switch. The implementation cost of the scheme 1 is high, and the power consumption is high; the scheme 2 is not suitable for 5G system signals, the 5G system signals have no obvious characteristic signals at the uplink and downlink switching time, and if the scheme 2 is adopted, the detection precision is very low. Therefore, no low-cost uplink and downlink time slot synchronization scheme suitable for 5G standard signals exists in the prior art.
Disclosure of Invention
The invention aims to provide a radio frequency amplification device and network side equipment, and aims to solve the problem that uplink and downlink time slots suitable for 5G standard signals are not synchronous in the prior art.
In order to solve the above problem, an embodiment of the present invention provides a radio frequency amplifying device, including:
a radio frequency unit, configured to output a high frequency signal, where the high frequency signal carries an uplink/downlink timeslot switching reference signal configured at a switching position of an uplink transmission timeslot and a downlink transmission timeslot;
the input end of the power divider is connected with the output end of the radio frequency unit;
the output end of the power divider is connected with the input end of the amplifying unit, and the amplifying unit comprises: the device comprises a directional coupler, a power detector and an uplink and downlink transceiving switch;
the high-frequency signal output by the radio frequency unit is transmitted to the directional coupler, and the directional coupler couples a first coupling signal and a second coupling signal;
the first coupling signal is transmitted to a first input end of the uplink and downlink transceiving switch;
the second coupling signal is transmitted to the power detector, the power detector demodulates the second coupling signal to obtain a control signal of the uplink and downlink transceiving switches, and the control signal is transmitted to a second input end of the uplink and downlink transceiving switches;
the control signal is used for controlling uplink and downlink time slot synchronization of the radio frequency amplification device.
And the power intensity of the uplink and downlink time slot switching reference signal is higher than that of downlink signal transmission.
Wherein the amplifying unit further comprises: a logic circuit;
the control signal is transmitted to the logic circuit, the logic circuit converts the control signal to obtain a digital control signal, and the digital control signal is transmitted to the second input end of the uplink and downlink transceiving switch.
Wherein the amplifying unit further comprises: a delay adjusting circuit;
the digital control signal is transmitted to the second input end of the uplink and downlink transceiving switch after being subjected to time delay adjustment of the time delay adjusting circuit;
and the time delay of the first coupled signal transmitted to the first input end of the uplink and downlink transceiving switch is the same as the time delay of the second coupled signal transmitted to the second input end of the uplink and downlink transceiving switch.
Wherein the amplifying unit further comprises:
an uplink signal amplifier and a downlink signal amplifier;
under the condition that the control signal is used for controlling the uplink and downlink transceiving switches to be switched to downlink signal transmission, the first coupling signal is output to the downlink signal amplifier through the output end of the uplink and downlink transceiving switches;
and under the condition that the control signal is used for controlling the uplink and downlink transceiving switches to be switched to uplink signal transmission, the preceding-stage uplink signal is transmitted to the third input end of the uplink and downlink transceiving switches after passing through the uplink signal amplifier.
Wherein the amplifying unit further comprises: a clock holding circuit;
and in the clock holding period of the clock holding circuit, the high-frequency signal output by the radio frequency unit does not carry the uplink and downlink time slot switching reference signal.
Wherein the radio frequency unit includes:
a first communication circuit and an adjustment circuit;
the first communication circuit obtains the clock holding time length of the clock holding circuit, and transmits the clock holding time length to the adjusting circuit, and the adjusting circuit adjusts the time frequency resource occupied by the uplink and downlink time slot switching reference signal according to the clock holding time length.
Wherein the amplifying unit further comprises: a second communication circuit for communicating with the first communication circuit,
the first communication circuit acquires the clock holding time length of the clock holding circuit through the second communication circuit.
The first communication circuit is further configured to transmit a proportional relationship between uplink and downlink timeslots to the amplifying unit through the second communication circuit, and the power detector of the amplifying unit demodulates the second coupling signal according to the proportional relationship between the uplink and downlink timeslots to obtain a control signal of the uplink and downlink transceiving switch.
The embodiment of the invention also provides network side equipment which comprises the radio frequency amplification device.
The technical scheme of the invention at least has the following beneficial effects:
in the radio frequency amplification device and the network side equipment of the embodiment of the invention, the high-frequency signal output by the radio frequency unit carries the uplink and downlink time slot switching reference signal configured at the switching position of the uplink transmission time slot and the downlink transmission time slot, and the uplink and downlink switching time is determined by detecting the uplink and downlink time slot switching reference signal through the power detector, so that the control signal is generated to control the uplink and downlink transceiving switches, and the uplink and downlink time slot synchronization is realized.
Drawings
Fig. 1 is a schematic structural diagram of a radio frequency amplifying device according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a frequency selective characteristic of a power divider of a radio frequency amplifying device according to an embodiment of the present invention;
fig. 3 shows a frame structure of a high-frequency signal output by a radio frequency unit of the radio frequency amplifying device according to the embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a high-frequency signal output by a radio frequency unit of the radio frequency amplifying device according to the embodiment of the present invention;
fig. 5 is a schematic diagram illustrating a digital control signal output by a logic unit of the rf amplifying device according to the embodiment of the present invention;
fig. 6 is a schematic diagram illustrating a cost reduction scheme of a distributed pico-base station according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
In the embodiment of the present invention, a 5G standard signal is taken as an example, but the embodiment is not limited to this signal, and the technical solution provided in the embodiment of the present invention may be applied to other signals having the same problem.
As shown in fig. 1, an embodiment of the present invention provides a radio frequency amplifying device, including:
a radio frequency unit 1, configured to output a high frequency signal, where the high frequency signal carries an uplink/downlink timeslot switching reference signal configured at a switching position of an uplink transmission timeslot and a downlink transmission timeslot;
the input end of the power divider 2 is connected with the output end of the radio frequency unit 1;
an amplifying unit 3, an output end of the power divider 2 is connected to an input end of the amplifying unit 3, and the amplifying unit 3 includes: a directional coupler 31, a power detector 32, and an uplink/downlink transmission/reception switch 33;
wherein, the high frequency signal output by the radio frequency unit 1 is transmitted to the directional coupler 31, and the directional coupler 31 couples the obtained first coupling signal and second coupling signal;
the first coupling signal is transmitted to the first input end B of the uplink and downlink transceiving switch 33;
the second coupling signal is transmitted to the power detector 32, the power detector 32 demodulates the second coupling signal to obtain a control signal of the uplink/downlink transceiving switch, and the control signal is transmitted to a second input terminal C of the uplink/downlink transceiving switch 33;
the control signal is used for controlling uplink and downlink time slot synchronization of the radio frequency amplification device.
In the embodiment of the present invention, the rf unit 1 functions to output a high frequency signal, which is a cellular communication signal, for example, a 5G NR signal. An output signal of the radio frequency unit 1 passes through the power divider 2 with frequency selectivity and then is transmitted to the amplifying unit 3, wherein the frequency selection characteristic of the power divider 2 is shown in fig. 2; the frequency band of 0.7-2.7GHz is used for supporting high-frequency signals output by the radio frequency circuit, and the frequency band below 1MHz is used for transmitting direct current electric energy.
Optionally, the uplink and downlink timeslot switching reference signal is a channel state information reference signal CSI-RS, as shown in fig. 3, the CSI-RS is configured at a Downlink (DL) and Uplink (UL) switching position; wherein the time domain length of the CSI-RS may be 1-14 symbols (symbols), and the frequency domain length of the CSI-RS may be 1-273 PRB resources. The CSI-RS may be a continuous frequency domain resource or a discrete frequency domain resource. The more resources the CSI-RS occupies in the time domain and the frequency domain, the greater the overhead for the system, i.e. the more traffic channel resources are occupied.
Optionally, the power strength of the uplink and downlink timeslot switching reference signal is higher than the power strength of downlink signal transmission.
As shown in fig. 4, the power of the uplink and downlink timeslot switching reference signal is higher than the overall power strength of the downlink signal, so as to ensure that the uplink and downlink switching time can be accurately captured by the power detector.
As an alternative embodiment, the amplifying unit 3 further comprises: a logic circuit 34;
the control signal is transmitted to the logic circuit, the logic circuit 34 converts the control signal into a digital control signal, and the digital control signal is transmitted to the second input end C of the uplink and downlink transceiving switch 33.
In the embodiment of the present invention, a digital control signal of the control signal after being output by the logic circuit is shown in fig. 5.
To solve this problem, as another alternative embodiment, the amplifying unit 3 further includes: a delay adjusting circuit 35;
the digital control signal is adjusted by the time delay adjusting circuit 35, and then transmitted to the second input terminal C of the uplink and downlink transceiving switch 33;
and the time delay of the first coupled signal transmitted to the first input end B of the uplink and downlink transceiving switch is the same as the time delay of the second coupled signal transmitted to the second input end C of the uplink and downlink transceiving switch.
In the embodiment of the present invention, a delay adjusting circuit 35 is added after the logic circuit 34 to implement time synchronization between the uplink and downlink signals and the control signal. The specific structure of the delay adjusting circuit 35 can be implemented by a technical solution that is well known in the art, and is not limited herein. In order to minimize random interference introduced during signal transmission, the delay value inside the delay adjusting circuit may be an average value over a period of time.
As another alternative embodiment, the amplifying unit 3 further includes:
an upstream signal amplifier 36 and a downstream signal amplifier 37;
when the control signal is used to control the uplink/downlink transceiving switch to downlink signal transmission (for example, control signal = 1), the first coupling signal is output to the downlink signal amplifier through an output end of the uplink/downlink transceiving switch;
when the control signal is used to control the uplink/downlink transceiving switch to uplink signal transmission (for example, the control signal = 0), the preceding-stage uplink signal is transmitted to the third input terminal of the uplink/downlink transceiving switch after passing through the uplink signal amplifier.
In short, when the control signal =1, the uplink/downlink transceiver switch switches to a downlink signal, and the high-frequency signal is sent to the subsequent circuit through the downlink signal amplifier 35; when the control signal =0, the uplink/downlink transmit/receive switch is switched to an uplink signal, and the preceding-stage uplink signal is sent to the uplink/downlink transmit/receive switch after passing through the uplink signal amplifier 34.
It should be noted that, when the traffic volume is large, the transmission power is strong (i.e., the power strength of the downlink signal is increased), the power of the required CSI-RS signal is increased, and the occupied time domain and frequency domain resources are increased. When the traffic volume is small, the transmitting power is weak, the power of the required CSI-RS signal is reduced, and the occupied time domain and frequency domain resources are reduced. Therefore, the number of resources of a time domain and a frequency domain occupied by the CSI-RS signal can be adaptively adjusted according to the service volume; therefore, when the traffic volume is large, the system overhead caused by the CSI-RS will be large; to solve this problem, as a further alternative embodiment, the amplifying unit 3 further includes: a clock holding circuit;
and in the clock holding period of the clock holding circuit, the high-frequency signal output by the radio frequency unit does not carry the uplink and downlink time slot switching reference signal.
Further, the radio frequency unit includes:
a first communication circuit and an adjustment circuit;
the first communication circuit obtains the clock holding time length of the clock holding circuit, and transmits the clock holding time length to the adjusting circuit, and the adjusting circuit adjusts the time frequency resource occupied by the uplink and downlink time slot switching reference signal according to the clock holding time length.
Optionally, the amplifying unit further includes: a second communication circuit for communicating with the first communication circuit,
the first communication circuit acquires the clock holding time length of the clock holding circuit through the second communication circuit.
Specifically, the adjusting circuit adjusts the time domain and frequency domain resources occupied by the uplink and downlink timeslot switching reference signal (CSI-RS) according to the clock holding capability of the amplifying unit (if the clock holding time length is long, the clock holding capability is high, otherwise the clock holding capability is low). When the clock retention capacity is high, reducing time domain and frequency domain resources occupied by a reference signal (CSI-RS); when the clock holding capability is low, time domain and frequency domain resources occupied by a reference signal (CSI-RS) are increased.
Optionally, in the foregoing embodiment of the present invention, the first communication circuit is further configured to transmit a proportional relationship between uplink and downlink timeslots to the amplifying unit through the second communication circuit, and the power detector of the amplifying unit demodulates the second coupling signal according to the proportional relationship between the uplink and downlink timeslots to obtain the control signal of the uplink and downlink transceiving switch.
Optionally, the radio frequency amplification apparatus provided in the embodiment of the present invention is suitable for, but not limited to, a distributed pico-base station, as shown in fig. 6, where the distributed pico-base station includes: baseband unit, exchange unit and radio frequency unit. In order to reduce the total cost of the distributed pico-base station network, the radio frequency unit is externally connected with a plurality of amplifying units through the power divider to enlarge the coverage area of the radio frequency unit.
To sum up, in the embodiments of the present invention, the high frequency signal output by the radio frequency unit carries the uplink and downlink timeslot switching reference signal configured at the switching position of the uplink transmission timeslot and the downlink transmission timeslot, and the power detector detects the uplink and downlink timeslot switching reference signal to determine the uplink and downlink switching time, and further generates the control signal to control the uplink and downlink transceiving switches, thereby implementing uplink and downlink timeslot synchronization.
In order to better achieve the above object, an embodiment of the present invention further provides a network side device, which includes the radio frequency amplification apparatus as described above.
To sum up, in the embodiments of the present invention, the high frequency signal output by the radio frequency unit carries the uplink and downlink timeslot switching reference signal configured at the switching position of the uplink transmission timeslot and the downlink transmission timeslot, and the power detector detects the uplink and downlink timeslot switching reference signal to determine the uplink and downlink switching time, and further generates the control signal to control the uplink and downlink transceiving switches, thereby implementing uplink and downlink timeslot synchronization.
It should be noted that, the network side device provided in the embodiments of the present invention is a network side device including the radio frequency amplification apparatus, and all embodiments of the radio frequency amplification apparatus are applicable to the network side device and can achieve the same or similar beneficial effects.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. A radio frequency amplification device, comprising:
a radio frequency unit, configured to output a high frequency signal, where the high frequency signal carries an uplink/downlink timeslot switching reference signal configured at a switching position of an uplink transmission timeslot and a downlink transmission timeslot;
the input end of the power divider is connected with the output end of the radio frequency unit;
the output end of the power divider is connected with the input end of the amplifying unit, and the amplifying unit comprises: the directional coupler, the power detector and the uplink and downlink transceiving switches;
the high-frequency signal output by the radio frequency unit is transmitted to the directional coupler, and the directional coupler couples a first coupling signal and a second coupling signal;
the first coupling signal is transmitted to a first input end of the uplink and downlink transceiving switch;
the second coupling signal is transmitted to the power detector, the power detector demodulates the second coupling signal to obtain a control signal of the uplink and downlink transceiving switches, and the control signal is transmitted to a second input end of the uplink and downlink transceiving switches;
the control signal is used for controlling uplink and downlink time slot synchronization of the radio frequency amplification device; the power intensity of the uplink and downlink time slot switching reference signal is higher than that of downlink signal transmission.
2. The radio frequency amplification device of claim 1, wherein the amplification unit further comprises: a logic circuit;
the control signal is transmitted to the logic circuit, the logic circuit converts the control signal to obtain a digital control signal, and the digital control signal is transmitted to the second input end of the uplink and downlink transceiving switch.
3. The radio frequency amplification device of claim 2, wherein the amplification unit further comprises: a delay adjusting circuit;
the digital control signal is transmitted to the second input end of the uplink and downlink transceiving switch after being subjected to time delay adjustment of the time delay adjusting circuit;
and the time delay of the first coupled signal transmitted to the first input end of the uplink and downlink transceiving switch is the same as the time delay of the second coupled signal transmitted to the second input end of the uplink and downlink transceiving switch.
4. The radio frequency amplification device of claim 1, wherein the amplification unit further comprises:
an uplink signal amplifier and a downlink signal amplifier;
under the condition that the control signal is used for controlling the uplink and downlink transceiving switches to be switched to downlink signal transmission, the first coupling signal is output to the downlink signal amplifier through the output end of the uplink and downlink transceiving switches;
and under the condition that the control signal is used for controlling the uplink and downlink transceiving switches to be switched to uplink signal transmission, the preceding-stage uplink signal is transmitted to the third input end of the uplink and downlink transceiving switches after passing through the uplink signal amplifier.
5. The radio frequency amplification device of claim 1, wherein the amplification unit further comprises: a clock holding circuit;
and in the clock holding period of the clock holding circuit, the high-frequency signal output by the radio frequency unit does not carry the uplink and downlink time slot switching reference signal.
6. The radio frequency amplification device according to claim 5, wherein the radio frequency unit includes:
a first communication circuit and an adjustment circuit;
the first communication circuit obtains the clock holding time length of the clock holding circuit, and transmits the clock holding time length to the adjusting circuit, and the adjusting circuit adjusts the time frequency resource occupied by the uplink and downlink time slot switching reference signal according to the clock holding time length.
7. The radio frequency amplification device of claim 6, wherein the amplification unit further comprises: a second communication circuit for communicating with the first communication circuit,
the first communication circuit acquires the clock holding time length of the clock holding circuit through the second communication circuit.
8. The radio frequency amplification device according to claim 7, wherein the first communication circuit is further configured to transmit a proportional relationship between uplink and downlink timeslots to the amplification unit through the second communication circuit, and the power detector of the amplification unit demodulates the second coupling signal according to the proportional relationship between the uplink and downlink timeslots to obtain the control signal of the uplink and downlink transceiving switches.
9. A network side device comprising the radio frequency amplification apparatus according to any one of claims 1 to 8.
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| CN201910445974.3A CN112003641B (en) | 2019-05-27 | 2019-05-27 | Radio frequency amplification device and network side equipment |
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| CN112003641B true CN112003641B (en) | 2022-11-29 |
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| KR100556843B1 (en) * | 2003-04-18 | 2006-03-10 | 엘지전자 주식회사 | Up/down link synchronize apparatus and method for mobile communication device |
| KR20060005925A (en) * | 2004-07-14 | 2006-01-18 | 에스케이 텔레콤주식회사 | Method and system for generating switching timing signal for separating transmitting and receiving signal in rf repeater of mobile telecommunication network using tdd and odfm modulation |
| CN1913392B (en) * | 2005-08-11 | 2011-07-20 | 大唐移动通信设备有限公司 | Relay amplification device with transmit-receive function and transmit-receive control method |
| CN100562171C (en) * | 2006-06-15 | 2009-11-18 | 大唐移动通信设备有限公司 | Detect method, device and the trunking of synchronous points and switching point position |
| CN101051851B (en) * | 2007-05-16 | 2012-10-03 | 贵州大学 | Programmable/automatic delay compensation method and device of radio frequency module in TDD system |
| CN101232320A (en) * | 2007-12-29 | 2008-07-30 | 深圳国人通信有限公司 | Realizing method of TD-SCDMA straight amplification station and straight amplification station |
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| Title |
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| R4-167553 "Discussion on 5G NR TDD ON-OFF switching";CATT;《3GPP tsg_ran\WG4_Radio》;20160930;全文 * |
| R4-1709683 "Considerations on switched single UL/dual UL transmission in LTE-NR";Dish Network;《3GPP tsg_ran\WG4_Radio》;20170911;全文 * |
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