CN101980580B - Base station, remote radio unit and signal sending method thereof - Google Patents
Base station, remote radio unit and signal sending method thereof Download PDFInfo
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Abstract
The invention discloses a base station, a remote radio unit and a signal sending method thereof. The signal sending method comprises the following steps that: after performing transmission and transformation processing on information, a transmission and baseband signal processing module transmits the processed information to a radio transceiver through a baseband signal; the radio transceiver modulates the baseband signal into a first-frequency radio signal and sends the first-frequency radio signal to the remote radio unit; the remote radio unit modulates the received first-frequency radio signal into a third-frequency radio signal and sends the third-frequency radio signal in a time division duplex mode; the remote radio unit modulates the third-frequency radio signal received in the time division duplex mode into a second-frequency radio signal and sends the second-frequency radio signal to the radio transceiver; and the radio transceiver modulates the second-frequency radio signal received from the remote radio unit into the baseband signal and transmits the baseband signal to the transmission and baseband signal processing module. A coverage system adopted in the method has simplified equipment and can greatly improve the coverage distance between a main station and the remote radio unit and reduce the cost of network components.
Description
Technical field
The present invention relates to mobile communication equipment, particularly a kind of base station, remote radio unit (RRU) and signaling method thereof.
Background technology
For the covering in special remote place, the general method that adopts has following several at present:
1, adopts base station+wireless discharging-directly station.
Fig. 1 is that repeater and base station form schematic diagram, and as shown in the figure, under this scheme, base station and repeater near-end machine can adopt Direct cable connection or wireless coupling.Use the relaying frequency to communicate by letter with the repeater remote termination by relay antenna, relaying frequency and system's rf frequency are with frequency or alien frequencies.
This scheme deficiency is: cost is high, and system forms and comprises complete mobile base station, and wireless discharging-directly station comprises near-end machine, remote termination.Because base station and wireless discharging-directly station independent design are so coverage distance is limited.General base station can not compensate the propagation delay time between the wireless discharging-directly station, and therefore, coverage distance is subject to system to the requirement for restriction of the time delay of eating dishes without rice or wine.
2, adopt digital microwave relaying+base station.
Under this scheme, far-end is directly used the base station, and the base station adopts digital microwave to do relay transmission to base station controller.
This scheme deficiency is: cost is higher, and system comprises base station and digital microwave relaying, and digital microwave needs line-of-sight transmission, and project installation is limited easily.
Summary of the invention
Technical problem solved by the invention is to provide a kind of base station, remote radio unit (RRU) and signaling method thereof.
A kind of base station is provided in the embodiment of the invention, has comprised:
Transmission and baseband signal processing module are used for information is transmitted and conversion process, by baseband signal and radio receiving-transmitting unit interaction data;
Radio receiving-transmitting unit, be used for adopting FDD mode and the mutual wireless signal of remote radio unit (RRU), wireless signal by first frequency sends the data that described transmission and baseband signal processing module transfer to remote radio unit (RRU), and the transmission of wireless signals of the second frequency that will receive from remote radio unit (RRU) is to described transmission and baseband signal processing module.
Preferably, radio receiving-transmitting unit is for adopting intermediate frequency to carry out the mutual radio receiving-transmitting unit of wireless signal as first frequency, second frequency.
A kind of signaling method of base station is provided in the embodiment of the invention, has comprised the steps:
The transmission and baseband signal processing module transmits information and conversion process after, by base band signal transmission to radio receiving-transmitting unit;
Radio receiving-transmitting unit is modulated to baseband signal the wireless signal of first frequency;
Radio receiving-transmitting unit sends the wireless signal of first frequency to remote radio unit (RRU).
Preferably, when sending the wireless signal of first frequency to remote radio unit (RRU), relative standard's the signal transmission time of eating dishes without rice or wine shifts to an earlier date t0 and sends, and t0=L/C, L are the distance of base station and remote radio unit (RRU), and C is the light velocity.
Preferably, if there are a plurality of remote radio unit (RRU)s, L is the distance that the remote radio unit (RRU) of distal-most end is arrived in the base station.
A kind of signal acceptance method of base station is provided in the embodiment of the invention, has comprised the steps:
Radio receiving-transmitting unit receives the wireless signal of second frequency from remote radio unit (RRU);
Radio receiving-transmitting unit is modulated to baseband signal with the wireless signal of second frequency;
With the base band signal transmission of modulation to described transmission and baseband signal processing module.
A kind of remote radio unit (RRU) is provided in the embodiment of the invention, has comprised:
Transport module, be used for adopting FDD mode and the mutual wireless signal of radio receiving-transmitting unit, the backward radio receiving-transmitting unit of wireless signal that the wireless signal of the 3rd frequency that radio-frequency module is transferred to is modulated to second frequency sends, and the wireless signal of the first frequency that will receive from radio receiving-transmitting unit transfers to radio-frequency module after being modulated to the wireless signal of the 3rd frequency;
Radio-frequency module be used for to adopt the TDD mode by wireless signal and the terminal interaction wireless signal of the 3rd frequency, sends the wireless signal of the 3rd frequency that transport module transfers to, with the transmission of wireless signals of the 3rd frequency of reception to transport module.
Preferably, further comprise:
Synchronization module is used for utilizing GPS or the Big Dipper to carry out time service.
A kind of signaling method of remote radio unit (RRU) is provided in the embodiment of the invention, has comprised the steps:
Radio-frequency module will adopt the transmission of wireless signals of the 3rd frequency that the TDD mode receives to transport module;
The wireless signal of the 3rd frequency that transport module transfers to radio-frequency module is modulated to the wireless signal of second frequency;
Transport module sends the wireless signal of the second frequency of modulation to radio receiving-transmitting unit.
Preferably, the Transmit enable time point of remote radio unit (RRU) TDD mode of operation disposes by management station.
A kind of signal acceptance method of remote radio unit (RRU) is provided in the embodiment of the invention, has comprised the steps:
Transport module receives the wireless signal of the first frequency of radio receiving-transmitting unit transmission;
Transport module transfers to radio-frequency module after the wireless signal of first frequency being modulated to the wireless signal of the 3rd frequency;
Radio-frequency module adopts the TDD mode to send the wireless signal of the 3rd frequency that transport module transfers to.
Preferably, the Transmit enable time point of remote radio unit (RRU) TDD mode of operation disposes by management station.
Beneficial effect of the present invention is as follows:
Implement by the technical scheme that the embodiment of the invention provides, with respect to the base station of common employing and the special screne covering system of wireless discharging-directly station composition, simplified equipment, simultaneously because main website presets the propagation delay time compensation, the coverage distance of main website and remote radio unit (RRU) can increase substantially, and can reduce network and form cost.
Description of drawings
Fig. 1 is repeater and base station composition schematic diagram in the background technology;
Fig. 2 is architecture of base station schematic diagram in the embodiment of the invention;
Fig. 3 is remote radio unit (RRU) structural representation in the embodiment of the invention;
Fig. 4 is based on shift frequency wireless base system structural representation grand, little base station in the embodiment of the invention;
Fig. 5 is the system schematic of general distributed base station in the embodiment of the invention;
Fig. 6 is based on the shift frequency wireless base system structural representation of distributed base station in the embodiment of the invention;
Fig. 7 is general TDD radio receiving-transmitting unit principle schematic in the embodiment of the invention;
Fig. 8 is FDD radio receiving-transmitting unit principle schematic in the embodiment of the invention;
Fig. 9 is remote radio unit (RRU) functional block schematic diagram in the embodiment of the invention;
Figure 10 is base station signal sending method implementing procedure schematic diagram in the embodiment of the invention;
Figure 11 is the signal acceptance method implementing procedure schematic diagram of remote radio unit (RRU) in the embodiment of the invention;
Figure 12 is shift frequency wireless base system main website and remote radio unit (RRU) emission downstream signal sequential schematic diagram in the embodiment of the invention;
Figure 13 is the signaling method implementing procedure schematic diagram of remote radio unit (RRU) in the embodiment of the invention;
Figure 14 is the signal acceptance method implementing procedure schematic diagram of base station in the embodiment of the invention;
Figure 15 is shift frequency wireless base system main website and remote radio unit (RRU) reception upward signal sequential schematic diagram in the embodiment of the invention;
Figure 16 is shift frequency wireless base system main website and the remote radio unit (RRU) sequential schematic diagram of eating dishes without rice or wine in the embodiment of the invention.
Embodiment
Shift frequency wireless base system corresponding to providing in the embodiment of the invention is comprised of main website and remote radio unit (RRU); Main website is connected wireless FDD relaying frequency signal and connects with remote radio unit (RRU).
The transmission of direct change relay wireless becomes the FDD duplex mode from the TDD duplex mode radio receiving-transmitting unit of repeater near-end machine and former base station can be merged design in implementation after.This moment, the descending output signal of main website radio receiving-transmitting unit was downlink relay frequency Fdt, and the uplink receiving signal of main website radio receiving-transmitting unit is uplink relay frequency Fur.The wireless relay of remote radio unit (RRU) function fundamental sum main website radio communication adopts fdd mode, radio frequency part with terminal communication still is tdd mode, on synchronously, then adopt GPS (Global Positioning System, global positioning system) or Beidou receiver synchronous.
In this programme, FDD relaying frequency can be the intermediate frequency of lower frequency, or other any assigned frequencies.Under the propagation loss, can promote the mounting distance of main website and RF remote unit like this;
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described.
In declarative procedure, the enforcement from base station and remote radio unit (RRU) is respectively described, then the cooperation of the two is implemented to describe, but this does not also mean that the two must cooperate enforcement, in fact, separate when implementing with remote radio unit (RRU) when the base station, it also solves the problem that exists at base station and remote radio unit (RRU) separately, when just the two is combined with, can obtain better technique effect.
Fig. 2 is the architecture of base station schematic diagram, and as shown in the figure, base station (main website) can comprise:
Transmission and baseband signal processing module 201 are used for information is transmitted and conversion process, by baseband signal and radio receiving-transmitting unit interaction data;
Wherein, information refers to voice or the data in the general communication.
Radio receiving-transmitting unit 202, be used for adopting FDD mode and the mutual wireless signal of remote radio unit (RRU), wireless signal by first frequency sends the data that described transmission and baseband signal processing module transfer to remote radio unit (RRU), and the transmission of wireless signals of the second frequency that will receive from remote radio unit (RRU) is to described transmission and baseband signal processing module.
Fig. 3 is the remote radio unit (RRU) structural representation, as shown in the figure, can comprise in the remote radio unit (RRU):
Radio-frequency module 302 be used for to adopt the TDD mode by wireless signal and the terminal interaction wireless signal of the 3rd frequency, sends the wireless signal of the 3rd frequency that transport module transfers to, with the transmission of wireless signals of the 3rd frequency of reception to transport module.
In the enforcement, can further include in the remote radio unit (RRU):
Because generally there are centralized base station (grand little base station) and distributed base station 2 large classes in base station commonly used at present.Corresponding shift frequency wireless base system also has the 2 large series products forms that produce based on centralized base station (grand little base station) and distributed base station.The below describes the system that two series products form.
Fig. 4 is based on shift frequency wireless base system structural representation grand, little base station, as shown in the figure, the main station system of shift frequency wireless base system and former grand little base station composition and function class are that operating frequency becomes appointment FDD relaying frequency by original rf frequency seemingly, and duplex mode becomes FDD by TDD.Increasing has remote radio unit (RRU).
Fig. 5 is the system schematic of general distributed base station, Fig. 6 is the shift frequency wireless base system structural representation based on distributed base station, as shown in the figure, based on distributed base station system, in the shift frequency wireless base system, the operating frequency of intermediate frequency RRU (Radio Remote Unit, Remote Radio Unit) becomes the FDD relaying frequency of appointment.BBU of distributed base station (BaseBand Unit, baseband processing unit) can connect a plurality of RRU; The main station system of shift frequency wireless base system and former distributed base station constitute and function are similar, and just operating frequency becomes appointment FDD relaying frequency by original TDD rf frequency.Increasing has remote radio unit (RRU).
The below describes the implementation of main website.
Fig. 7 is general TDD radio receiving-transmitting unit principle schematic, Fig. 8 is FDD radio receiving-transmitting unit principle schematic, as shown in the figure, for TDD (Time Division Duplex, time division duplex) base station system, it no matter is radio receiving-transmitting unit among the RRU in grand little base station or the distributed base station, general circuit framework as shown in Figure 7, analog transceiver letter machine part comprises power amplifier, LNA, modulator-demodulator, filter, the conventional treatment such as radio-frequency (RF) switch.Whole operation principle is with general FDD radio receiving-transmitting unit, and tranmitting frequency is the Fdt of appointment, and receive frequency is the Fur of appointment.
The radio frequency part of main website adopts relaying FDD dual-mode.The circuit working principle can be with general FDD transceiver.
Processing for downstream signal, downgoing baseband information shifts to an earlier date the t0 emission with respect to the standard base station system, by Digital Up Convert and DAC (Digital Analog Converter, digital to analog converter) be converted to analog signal after, the downlink relay emission is processed and (is processed such as general general emission and comprise: amplify through main website, frequency conversion, filtering, gain control etc.), baseband signal is modulated to the downlink relay frequency Fdt of appointment, amplify through PA (power amplifier, power amplifier) 1, be transmitted into RF far-end module through duplexer 1 relay antenna.
Processing for upward signal, receive the uplink relay signal that remote radio unit (RRU) launches, frequency is Fur, through relaying all over the world, duplexer, LNA (Low Noise Amplifier, low noise amplifier) 1 low noise amplification, (comprise such as general general reception ﹠ disposal: gain control, frequency conversion, filtering by main website uplink relay reception ﹠ disposal, amplify etc.), be sampled as digital signal by ADC (Analog-to-Digital Converter, analog to digital converter), be sent to modulation demodulation through Digital Down Convert converting digital baseband signal and process.
Fig. 9 is remote radio unit (RRU) functional block schematic diagram, and as shown in the figure, the operation principle of remote radio unit (RRU) is that relaying adopts the FDD dual-mode, and radio frequency adopts the TDD dual-mode.
Processing for downstream signal, remote radio unit (RRU) passes through relay antenna, receiving frequency is the downstream signal of the main website emission of Fdt, by duplexer and low noise amplification, by (the gain control of far-end relaying downlink processing, filtering processing etc.), by the same DL (Downlink of frequency converter, down link) descending local oscillator is carried out mixing, the downlink relay signal frequency conversion that with frequency is Fdt is the downlink signal of Fw to frequency, by passing through the radio-frequency receiving-transmitting switch after the power amplification of emission radio frequency processing, be transmitted into terminal from radio-frequency antenna behind the filter.
Processing for upward signal, remote radio unit (RRU) passes through radio-frequency antenna, filter, the radio-frequency receiving-transmitting switch, receive the upward signal of terminal emission, through the LNA low noise amplification, process rear (gain control by received RF, filtering processing etc.), carrying out mixing by the up local oscillator of the same UL of frequency converter (Uplink, up link), is that the up radiofrequency signal of Fw is converted to the uplink relay signal that frequency is Fur with frequency, after the up processing of far-end relaying, by being transmitted into main website by duplexer 2 by relay antenna after the PA2 power amplification.
In the enforcement, the remote radio unit (RRU) Synchronization Control can adopt GPS receiver (also can adopt Beidou receiver).
The below implements to describe to transmission and the reception of signal between main website and the remote radio unit (RRU).
In sending enforcement, according to the networking result, can obtain the distance of main website and remote radio unit (RRU).Calculate the propagation delay t0 between the two, specifically can be stored in main website.This time delay t0=L/C.L is the distance of main website and remote radio unit (RRU), and C is the light velocity.If there are a plurality of remote radio unit (RRU)s, this time delay t0 can be the propagation delay of main website to the remote radio unit (RRU) of distal-most end.
In the enforcement, when main website and remote radio unit (RRU) were in normal operating conditions, GPS is genlocing, operating frequency, and TDD Transmit enable point, configuration is correct, the transmitting-receiving gain, and other parameters are normal.Then the signal of base station and remote radio unit (RRU) sends and is implemented as follows:
Figure 10 is base station signal sending method implementing procedure schematic diagram, as shown in the figure, can comprise the steps:
In the enforcement, when sending the wireless signal of first frequency to remote radio unit (RRU), relative standard's the signal transmission time of eating dishes without rice or wine shifts to an earlier date t0 and sends, and t0=L/C, L are the distance of base station and remote radio unit (RRU), and C is the light velocity.
Concrete, if there are a plurality of remote radio unit (RRU)s, L is the distance that the remote radio unit (RRU) of distal-most end is arrived in the base station.
Figure 11 is the signal acceptance method implementing procedure schematic diagram of remote radio unit (RRU), as shown in the figure, can comprise the steps:
In the enforcement, the Transmit enable time point of remote radio unit (RRU) TDD mode of operation can dispose by management station.
When system works under emission state, the main website relative standard base station that transmits shifts to an earlier date t0 emission, after guaranteeing that this downlink relay signal arrives remote radio unit (RRU) process frequency conversion amplification, the radio frequency transmissions of the radio frequency transmissions when sending by radio-frequency antenna and TDD network other standards base station is synchronous.The link gain of the transmitting power of main website and radio frequency unit unit does corresponding power control according to the project situation of the two and gain adjustment gets final product, and makes the remote radio unit (RRU) radio frequency power output reach the intended power output requirement.Crucial sequential as shown in figure 12.
Figure 12 is shift frequency wireless base system main website and remote radio unit (RRU) emission downstream signal sequential schematic diagram, each duration not drawn on scale among the figure, that utilizes the standard radio base station eats dishes without rice or wine sequential as a reference, and downstream signal refers to the wireless signal of TDD system base-station downlink.Upward signal represents that terminal transmits and arrives the wireless signal of antenna for base station mouth.GP (Guard Period, protection time slot) refers to the up access guard time that system is determined.GP1 refers to the transmitting-receiving translation and protection time that system is determined.
Figure 13 is the signaling method implementing procedure schematic diagram of remote radio unit (RRU), as shown in the figure, can comprise the steps:
Step 1301, radio-frequency module will adopt the transmission of wireless signals of the 3rd frequency that the TDD mode receives to transport module;
The wireless signal of the 3rd frequency that step 1302, transport module transfer to radio-frequency module is modulated to the wireless signal of second frequency;
Step 1303, transport module send the wireless signal of the second frequency of modulation to radio receiving-transmitting unit.
In the enforcement, the Transmit enable time point of remote radio unit (RRU) TDD mode of operation can dispose by management station.
Figure 14 is the signal acceptance method implementing procedure schematic diagram of base station, as shown in the figure, can comprise the steps:
Step 1401, radio receiving-transmitting unit receive the wireless signal of second frequency from remote radio unit (RRU);
Step 1402, radio receiving-transmitting unit are modulated to baseband signal with the wireless signal of second frequency;
Step 1403, with the base band signal transmission of modulation to described transmission and baseband signal processing module.
System works is under accepting state, because what adopt is the FDD relaying, the base station can be identical with the standard radio base station system to the up emission lead of terminal, certainly with respect to the standard base station, the terminal upward signal that the main website side joint is received has postponed t0, the receiving gain of main website and remote radio unit (RRU) link gain are done gain adjustment according to 2 project situation, make upward signal be amplified to suitable level requirement.Crucial sequential as shown in figure 15.
Figure 15 is that shift frequency wireless base system main website and remote radio unit (RRU) receive upward signal sequential schematic diagram, each duration not drawn on scale among the figure, that utilizes the standard radio base station eats dishes without rice or wine sequential as a reference, and downstream signal refers to the wireless signal of TDD system base-station downlink.Upward signal represents that terminal transmits and arrives the wireless signal of antenna for base station mouth.GP refers to the up access guard time that system is determined.GP1 refers to the transmitting-receiving translation and protection time that system is determined.
In the implementation, management station refers generally to the equipment to the relevant operational factor of equipment configuration, such as: LMT (Local Maintenance Terminal, local operation maintenance terminal).Generally speaking, device first is opened and can be utilized LMT to load related data and software.Or Long-distance Control, be configured by OMC-R (Operation and Maintenance Center-Radio, wireless operation maintenance center).
Figure 16 is shift frequency wireless base system main website and the remote radio unit (RRU) sequential schematic diagram of eating dishes without rice or wine, and for making things convenient for the sequential relationship of eating dishes without rice or wine to receive and dispatch of complete understanding main website and remote radio unit (RRU), Figure 16 shows that the sequential relationship of downstream signal emission and upward signal reception.
As seen from the above-described embodiment, the shift frequency wireless base system is comprised of main website and one or more remote radio unit (RRU).
Concrete, main website is similar with the base station composition of original communication system in the system, and the tdd mode radio receiving-transmitting unit in the former base station system is replaced with the FDD radio receiving-transmitting unit.The wireless relay frequency is the FDD relaying frequency of appointment.
Specifically, remote radio unit (RRU) receives the relaying downstream signal of main website and launches after assigned frequency is amplified through processing to upconvert to.Receive wireless signal and be down-converted to downlink relay reception signal through amplifying to process, be transmitted into main website after the amplification.
In the enforcement, the relaying of remote radio unit (RRU) adopts the FDD working method, and radio frequency adopts the TDD working method.
In the enforcement, the relaying downstream signal of main website is with respect to the in advance fixed response time t0 emission of standard base station system.This time delay t0=L/C.L is the distance of main website and remote radio unit (RRU), and C is the light velocity.
In the enforcement, when having a plurality of remote radio unit (RRU), this time delay t0 is determined by distance main website remote radio unit (RRU) farthest.
In the enforcement, the transmitting-receiving of remote radio unit (RRU) synchronously via satellite synchronously time dissemination system (such as GPS or the Big Dipper) carry out synchronously.
In the enforcement, the Transmit enable time point of remote radio unit (RRU) disposes by management station.
Implement by the technical scheme that the embodiment of the invention provides, with respect to the base station of common employing and the special screne covering system of wireless discharging-directly station composition, simplified equipment, simultaneously because main website presets the propagation delay time compensation, the coverage distance of main website and remote radio unit (RRU) can increase substantially, and can reduce network and form cost.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (12)
1. a base station is characterized in that, comprising:
Transmission and baseband signal processing module are used for information is transmitted and conversion process, by baseband signal and radio receiving-transmitting unit interaction data;
Radio receiving-transmitting unit, be used for adopting FDD mode and the mutual wireless signal of remote radio unit (RRU), wireless signal by first frequency sends the data that described transmission and baseband signal processing module transfer to remote radio unit (RRU), so that the wireless signal of the first frequency that described remote radio unit (RRU) will receive from described radio receiving-transmitting unit is modulated to the wireless signal of the 3rd frequency, and adopt the TDD mode by wireless signal and the terminal interaction wireless signal of the 3rd frequency; The transmission of wireless signals of the second frequency that will receive from remote radio unit (RRU) is to described transmission and baseband signal processing module, wherein, the wireless signal of described second frequency is to be modulated into by the wireless signal of described remote radio unit (RRU) according to the 3rd frequency of coming self terminal that receives.
2. base station as claimed in claim 1 is characterized in that, radio receiving-transmitting unit is for adopting intermediate frequency to carry out the mutual radio receiving-transmitting unit of wireless signal as first frequency, second frequency.
3. the signaling method of base station as claimed in claim 1 or 2 is characterized in that, comprises the steps:
The transmission and baseband signal processing module transmits information and conversion process after, by base band signal transmission to radio receiving-transmitting unit;
Radio receiving-transmitting unit is modulated to baseband signal the wireless signal of first frequency;
Radio receiving-transmitting unit sends the wireless signal of first frequency to remote radio unit (RRU).
4. method as claimed in claim 3 is characterized in that, when sending the wireless signal of first frequency to remote radio unit (RRU), relative standard's the signal transmission time of eating dishes without rice or wine shifts to an earlier date t0 and sends, and t0=L/C, L are the distance of base station and remote radio unit (RRU), and C is the light velocity.
5. method as claimed in claim 4 is characterized in that, if there are a plurality of remote radio unit (RRU)s, L is the distance that the remote radio unit (RRU) of distal-most end is arrived in the base station.
6. the signal acceptance method of base station as claimed in claim 1 or 2 is characterized in that, comprises the steps:
Radio receiving-transmitting unit receives the wireless signal of second frequency from remote radio unit (RRU);
Radio receiving-transmitting unit is modulated to baseband signal with the wireless signal of second frequency;
With the base band signal transmission of modulation to described transmission and baseband signal processing module.
7. a remote radio unit (RRU) is characterized in that, comprising:
Transport module, be used for adopting FDD mode and the mutual wireless signal of radio receiving-transmitting unit, the backward radio receiving-transmitting unit of wireless signal that the wireless signal of the 3rd frequency that radio-frequency module is transferred to is modulated to second frequency sends, and the wireless signal of the first frequency that will receive from radio receiving-transmitting unit transfers to radio-frequency module after being modulated to the wireless signal of the 3rd frequency;
Radio-frequency module be used for to adopt the TDD mode by wireless signal and the terminal interaction wireless signal of the 3rd frequency, sends the wireless signal of the 3rd frequency that transport module transfers to, with the transmission of wireless signals of the 3rd frequency of reception to transport module.
8. remote radio unit (RRU) as claimed in claim 7 is characterized in that, further comprises:
Synchronization module is used for utilizing global position system GPS or the Big Dipper to carry out time service.
One kind arbitrary such as claim 7 to 8 as described in the signaling method of remote radio unit (RRU), it is characterized in that, comprise the steps:
Radio-frequency module will adopt the transmission of wireless signals of the 3rd frequency that the TDD mode receives to transport module;
The wireless signal of the 3rd frequency that transport module transfers to radio-frequency module is modulated to the wireless signal of second frequency;
Transport module sends the wireless signal of the second frequency of modulation to radio receiving-transmitting unit.
10. method as claimed in claim 9 is characterized in that, the Transmit enable time point of remote radio unit (RRU) TDD mode of operation disposes by management station.
11. one kind arbitrary such as claim 7 to 8 as described in the signal acceptance method of remote radio unit (RRU), it is characterized in that, comprise the steps:
Transport module receives the wireless signal of the first frequency of radio receiving-transmitting unit transmission;
Transport module transfers to radio-frequency module after the wireless signal of first frequency being modulated to the wireless signal of the 3rd frequency;
Radio-frequency module adopts the TDD mode to send the wireless signal of the 3rd frequency that transport module transfers to.
12. method as claimed in claim 11 is characterized in that, the Transmit enable time point of remote radio unit (RRU) TDD mode of operation disposes by management station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010563704 CN101980580B (en) | 2010-11-29 | 2010-11-29 | Base station, remote radio unit and signal sending method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010563704 CN101980580B (en) | 2010-11-29 | 2010-11-29 | Base station, remote radio unit and signal sending method thereof |
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| Publication Number | Publication Date |
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| CN101980580A CN101980580A (en) | 2011-02-23 |
| CN101980580B true CN101980580B (en) | 2013-04-10 |
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| CN103533677B (en) * | 2013-10-08 | 2017-10-31 | 京信通信系统（中国）有限公司 | The method and apparatus of uplink signal of base station processing |
| MX377771B (en) * | 2015-08-20 | 2025-03-11 | Huawei Tech Co Ltd | RADIO REMOTE UNIT, RECEIVER AND BASE STATION. |
| CN105259558B (en) * | 2015-10-29 | 2017-12-12 | 交通信息通信技术研究发展中心 | A kind of half-duplex pseudo satellite, pseudolite device and its method of work based on Big Dipper RD functions |
| CN111866898A (en) * | 2020-05-29 | 2020-10-30 | 郑思杰 | Wireless communication signal distribution system and method, frequency shifter, access and radio frequency unit |
| CN111901803B (en) * | 2020-07-10 | 2021-09-14 | 展讯通信（上海）有限公司 | Communication interaction method, master node, slave node, indoor distribution system and medium |
| CN112511286A (en) * | 2020-10-19 | 2021-03-16 | 福州速职时代网络科技有限公司 | Frequency shift duplex conversion method and device |
| CN112770333B (en) * | 2020-12-11 | 2023-04-14 | 武汉虹信科技发展有限责任公司 | 5G NR wireless distributed frequency shift system and frequency shift method |
| CN113437992A (en) * | 2021-06-30 | 2021-09-24 | 展讯通信（上海）有限公司 | Radio frequency transceiver circuit |
| CN115499049A (en) * | 2022-11-10 | 2022-12-20 | 南京燧锐科技有限公司 | Wireless data transmission system across rotating joints |
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