CN217656751U - 5G radio frequency remote device and indoor distribution system - Google Patents
5G radio frequency remote device and indoor distribution system Download PDFInfo
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- CN217656751U CN217656751U CN202220794888.0U CN202220794888U CN217656751U CN 217656751 U CN217656751 U CN 217656751U CN 202220794888 U CN202220794888 U CN 202220794888U CN 217656751 U CN217656751 U CN 217656751U
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Abstract
The utility model discloses a 5G radio frequency is drawn far device and indoor distribution system relates to mobile communication technical field, can't directly utilize present indoor distribution system's of net problem when aiming at solving and arranging 5G indoor network. The 5G radio remote device comprises a baseband port, an intermediate frequency module, a radio frequency module, a first mixer and a radio frequency port which are electrically connected in sequence. The baseband port is used for connecting the 5G baseband processing unit. The intermediate frequency module is electrically connected with the baseband port and transmits 5G baseband signals. The intermediate frequency module is used for converting the 5G baseband signal and the 5G intermediate frequency signal. The radio frequency module is used for converting the 5G intermediate frequency signal and the 5G radio frequency signal. The first mixer is used for converting the 5G radio frequency signal and the 5G frequency conversion signal. The frequency band of the 5G frequency conversion signal is 500-2700MHz, and the frequency band of the 5G radio frequency signal is larger than that of the 5G frequency conversion signal. The radio frequency port can transmit 5G frequency conversion signals. The radio remote module is used for covering 5G signals.
Description
Technical Field
The utility model relates to a mobile communication technology field especially relates to a 5G radio frequency is drawn far device and indoor distribution system.
Background
Indoor distribution systems are a successful solution for improving the mobile communication environment within a building for indoor user groups. The indoor antenna distribution system is used for uniformly distributing signals of the mobile base station to each corner indoors, so that an indoor area has ideal signal coverage strength.
Currently, most indoor common scenarios have a huge number of indoor distribution systems (DAS) deployed at the time of infrastructure of 2G (2 th Generation Mobile Communication Technology, second Generation Mobile Communication Technology) networks, 3G (3 th Generation Mobile Communication Technology, third Generation Mobile Communication Technology) networks, and 4G (4 th Generation Mobile Communication Technology, fourth Generation Mobile Communication Technology) networks. Generally, a Remote Radio Unit (RRU) such as a 2G, a 3G, or a 4G is used as an information source to perform signal access, and the RRU is connected to each indoor distributed antenna through a Radio feeder to implement indoor coverage.
The frequency band for supporting transmission of the indoor distribution system of the existing network is generally 500-2700 MHz. And the 5G (5 th Generation Mobile Communication Technology, fifth Generation Mobile Communication Technology) signal frequency band is generally higher than 2700MHz. Therefore, when a 5G indoor network is deployed, the indoor distribution system of the existing network cannot be directly utilized.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a 5G radio frequency is drawn far device and indoor distribution system. The method aims to solve the problem that the existing network indoor distribution system cannot be directly utilized when a 5G indoor network is deployed.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
in one aspect, an embodiment of the present invention provides a radio remote module, including baseband port, intermediate frequency module, radio frequency module, first mixer and radio frequency port. The baseband port is used for connecting the 5G baseband processing unit. The intermediate frequency module is electrically connected with the baseband port and is used for transmitting 5G baseband signals, and the intermediate frequency module is used for converting the 5G baseband signals and the 5G intermediate frequency signals. The radio frequency module is electrically connected with the intermediate frequency module and is used for converting 5G intermediate frequency signals and 5G radio frequency signals. The first mixer is used for being electrically connected with the radio frequency module and used for converting the 5G radio frequency signal and the 5G frequency conversion signal. The frequency band of the 5G frequency conversion signal is the same as the frequency band of the signal supported by the indoor distribution system of the existing network for transmission, and the frequency band of the 5G radio frequency signal is greater than the frequency band of the 5G frequency conversion signal. And the radio frequency port is electrically connected with the first mixer and transmits the 5G frequency conversion signal.
Optionally, the 5G signal zooming-out device further includes at least one near-end covering module, and the near-end covering module includes a third power divider and a third rf antenna. The third power divider is installed between the radio frequency module and the first mixer and is electrically connected with the radio frequency module and the first mixer respectively. The third power divider and the radio frequency module perform signal transmission through a 5G radio frequency signal, and the third power divider is used for converting the 5G radio frequency signal between the third power divider and the radio frequency module into a plurality of paths of 5G radio frequency signals. And the third power divider and the first mixer perform signal transmission through one path of 5G radio frequency signals. The third radio frequency antenna is electrically connected with the third power divider, and the third radio frequency antenna and the third power divider perform signal transmission through another path of 5G radio frequency signals and perform 5G signal coverage through the third radio frequency antenna.
Optionally, the third power divider is a passive power divider or a passive coupler.
Optionally, the proximal end covering module includes a plurality of third rf antennas, and each third rf antenna is electrically connected to the rf module through a third power splitter.
Optionally, the first mixer is a multi-channel mixer, and is configured to convert multiple channels of 5G radio frequency signals and multiple channels of 5G frequency conversion signals.
Optionally, the intermediate frequency module includes a digital up-converter and a digital down-converter. The digital up-converter is electrically connected with the baseband port and used for receiving the 5G baseband signal and outputting a 5G intermediate frequency signal. The digital down converter is electrically connected with the baseband port and used for receiving the 5G intermediate frequency signal and outputting a 5G baseband signal.
Optionally, the radio frequency module includes a digital-to-analog converter, an analog-to-digital converter, a second mixer, a third mixer, a power amplifier, a low noise amplifier, and a duplexer. And the digital up-converter and the duplexer are electrically connected with the digital-analog converter, the second mixer and the power amplifier in turn. The analog-digital converter, the third mixer and the low signal noise amplifier are electrically connected between the digital down converter and the duplexer in sequence. The duplexer is also used for being electrically connected with the first mixer and transmitting 5G radio frequency signals.
Optionally, the intermediate frequency module further includes a digital filter and a digital predistorter installed between the digital up-converter and the analog-to-digital converter. The digital filter is respectively and electrically connected with the digital up-converter and the digital predistorter, and the digital predistorter is also electrically connected with the analog-digital converter.
Optionally, the radio frequency module further includes a first band pass filter and a second band pass filter. The first band-pass filter is arranged between the second mixer and the power amplifier and is respectively electrically connected with the second mixer and the power amplifier. The second band-pass filter is arranged between the low-noise amplifier and the duplexer and is respectively and electrically connected with the low-noise amplifier and the duplexer.
On the other hand, the embodiment of the utility model provides an indoor distribution system is still provided, including the 5G radio frequency in the aspect of the jacket device, access end multifrequency combiner, passive room divide network, output multifrequency combiner and distal end cover module. The access end multi-frequency combiner is electrically connected with the radio frequency port and is used for transmitting the 5G variable frequency signals, and the access end multi-frequency combiner is used for converting the 5G variable frequency signals and the combined signals. Output multifrequency combiner passes through passive room subnetwork and is connected with incoming end multifrequency combiner electricity, carries out signal transmission through combining the signal between output multifrequency combiner and the incoming end multifrequency combiner, and output multifrequency combiner is used for combining the conversion of signal and 5G radio frequency signal. The far-end covering module comprises at least one far-end machine and at least one second radio frequency antenna, the far-end machine is used for being electrically connected with the output end multi-frequency combiner and transmitting 5G frequency conversion signals, and the far-end machine is also used for converting the 5G frequency conversion signals and the 5G radio frequency signals. Each second radio frequency antenna is electrically connected with one remote machine and transmits 5G radio frequency signals, and 5G signal coverage is carried out through the second radio frequency antennas.
Optionally, the number of the remote units and the second rf antennas is multiple. The far-end covering module also comprises a second power divider, and each far-end machine is electrically connected with the output end multi-frequency combiner through the second power divider.
Optionally, the indoor distribution system further includes a power supply module for supplying power to each remote terminal.
The embodiment of the utility model provides a 5G radio frequency is drawn far the device when being applied to indoor distribution system, because 5G radio frequency is drawn far the device and can be received 5G baseband processing unit's 5G baseband signal through the baseband port to be 500 ~ 2700 MHz's 5G frequency conversion signal through intermediate frequency module, radio frequency module, first mixer and radio frequency port direct transmission frequency channel in proper order. Therefore, the 5G radio remote unit can transmit the 5G frequency conversion signal by directly utilizing the indoor distribution system, thereby realizing the coverage of the 5G signal. Compared with the prior art, the method has the advantages that near-end equipment which is connected with a power supply is not required to be additionally arranged, the number of equipment used in the indoor distribution system during 5G signal coverage can be reduced, the networking cost is favorably reduced, the running power consumption of the whole system equipment is reduced, and the energy is saved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an indoor distribution system provided in the related art;
fig. 2 is a schematic structural diagram of an indoor distribution system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of the 5G radio remote unit shown in fig. 2;
FIG. 4 is a schematic structural diagram of a near-end covering module installed between the RF module and the first mixer shown in FIG. 3;
FIG. 5 is a schematic structural diagram of the IF module and the RF module shown in FIG. 3;
fig. 6 is a schematic diagram of a downlink structure of the intermediate frequency module and the radio frequency module shown in fig. 5;
fig. 7 is a schematic diagram of an uplink structure of the if module and the rf module shown in fig. 5.
Reference numerals are as follows:
01-a first radio remote device; 02-a second radio remote device; 03-near-end machine; 04-a first combiner; 05-a passive room subsystem; 06-a second combiner; 07-power division coupler; 08-an antenna; 09-a remote machine; 010-a power supply unit;
1-a first radio remote device;
2-5G radio remote devices; 21-baseband port;
22-an intermediate frequency module; 221-digital up-converter; 222-a digital down converter; 223-a digital filter; 224-a digital predistorter;
23-a radio frequency module; 231-digital-to-analog converter; 232-a second mixer; 232-a power amplifier; 234-a duplexer; 235-analog-to-digital converter; 236-a third mixer; 237-low signal noise amplifier; 238-a first band-pass filter; 239-a second band-pass filter;
24-a first mixer; 25-a radio frequency port;
26-a proximal end covering module; 261-a third power splitter; 262-a third radio frequency antenna;
3-an access terminal multi-frequency combiner;
4-passive room network division;
5-output end multi-frequency combiner;
6-a remote coverage module; 61-a first power divider; 62-a second power divider; 63-a first radio frequency antenna; 64-a remote machine; 65-a second radio frequency antenna;
and 7, a power supply module.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
A base station, i.e. a public mobile communication base station, is an interface device for a mobile device to access the internet, and is a form of a radio station, which is a radio transceiver station for information transmission with a mobile phone terminal through a mobile communication switching center in a certain radio coverage area.
With the continuous development of the technology, the integrated base station has the defects of large feeder loss, large power consumption, difficult heat dissipation and the like, and is difficult to meet the increasing channel capacity requirement. Based on this, the base station system is continuously moving towards split type modularization.
The indoor baseband processing Unit (BBU) and the radio remote Unit are distributed Base station architectures largely used by 2G, 3G and 4G networks. The remote radio unit and the indoor baseband processing unit generally need to be connected by optical fiber, and can also be connected by a twisted pair network cable. One indoor baseband processing unit may support the connection of multiple remote radio units. By adopting the technical scheme of multiple channels of BBU and RRU, the indoor coverage problem of a large venue can be well solved.
In an indoor distribution system of an indoor coverage scheme in the prior art, signal access is generally performed by using radio remote units such as 2G, 3G, and 4G as information sources, and the radio remote units are connected to indoor distribution antennas through radio feeder lines to realize coverage of indoor coverage mobile signals. As in 2G, 3G and 4G network infrastructures, a huge number of indoor distribution systems have been deployed. However, the channel of the radio frequency feeder of the existing indoor distribution system is limited, and the frequency band of the frequency conversion signal supported and transmitted by the radio frequency feeder is generally 500-2700 MHz. The 5G radio frequency signals generally include frequency bands of 3400 MHz-3500 MHz, 3500 MHz-3600 MHz, 4800 MHz-4900 MHz and the like, that is, the frequency band of the 5G radio frequency signals is generally larger than that of the frequency conversion signals. Therefore, the 5G signal band output by the remote radio unit cannot be directly transmitted through the radio feeder (i.e. the existing network indoor distribution system).
Based on this, the prior art provides an indoor distribution system, as shown in fig. 1. The remote radio frequency remote controller comprises a first radio frequency remote device 01, a second radio frequency remote device 02, a near-end machine 03, a first combiner 04, a passive room distribution network (radio frequency feeder network) 05, a second combiner 06, a power distribution coupler 07, an antenna 08, a remote machine 09 and a power supply unit 010. The number of the first remote radio frequency devices 01 may be one or multiple, and each first remote radio frequency device 01 is electrically connected to the first combiner 04 and may transmit a 2G radio frequency signal, a 3G radio frequency signal, or a 4G radio frequency signal, which is not limited herein. Similarly, the number of the second remote radio devices 02 may be one or multiple, but the second remote radio device 02 is configured to be electrically connected to a 5G indoor baseband processing unit (i.e., a 5G base station) and may transmit a 5G baseband signal, and the second remote radio device 02 is further configured to convert the 5G baseband signal and the 5G radio signal. The second remote radio device 02 may be electrically connected to the near-end unit 03, and transmit the 5G radio signal, and the near-end unit 03 is configured to convert the 5G radio signal and the 5G frequency conversion signal. The frequency-converted signals may include 2G radio frequency signals, 3G radio frequency signals, 4G radio frequency signals, and 5G frequency-converted signals.
The first radio remote unit 01 and the near-end unit 03 are electrically connected to the first combiner 04, and the first combiner 04 is electrically connected to the passive room distribution network (radio frequency feeder network) 05. In the downlink (TX) direction, the first combiner 04 may combine multiple frequency-converted signals (at least one of a 2G radio frequency signal, a 3G radio frequency signal, and a 4G radio frequency signal, and a 5G frequency-converted signal), and feed the downlink combined signal into the single-channel passive room distribution network (radio frequency feeder network) 05 for transmission. Or, in the uplink (RX) direction, the first combiner 04 may receive the uplink combined signal from the passive room distribution network (radio frequency feeder network) 05, and split the uplink combined signal and correspondingly transmit the split uplink combined signal to the first remote radio device 01 and the near-end unit 03, respectively.
As shown in fig. 1, on the antenna 08 side, the second combiner 06 is electrically connected to the passive room division network 05 and the power division coupler 07, respectively. For example, in the downstream direction, the second combiner 06 may receive a downstream combined signal transmitted by the passive room distribution network 05, split the combined signal, and feed the split variable frequency signals into the corresponding power distribution couplers 07, respectively. Because the frequency band of the 2G radio frequency signal, the 3G radio frequency signal and the 4G radio frequency signal is 500-2700 MHz, the 2G radio frequency signal, the 3G radio frequency signal or the 4G radio frequency signal divided by the second combiner 06 can be directly transmitted by the passive indoor distribution network 05, so that the 2G radio frequency signal, the 3G radio frequency signal or the 4G radio frequency signal divided by the second combiner 06 can be divided into multiple signals by the power distribution coupler 07, and wireless signal coverage is performed through the antenna 08. The 5G frequency-converted signal split by the second combiner 06 may be electrically connected to the multiple remote units 09 through the power splitting coupler 07, and the remote units 09 may restore the 5G frequency-converted signal to a 5G radio frequency signal, and may perform 5G signal coverage through an antenna module (not shown) of the remote unit 09.
Or, in the uplink direction, the antenna module of the remote machine 09 may receive the 5G radio frequency signal, convert the received signal into a 5G frequency conversion signal through the remote machine 09, and transmit the signal to the second combiner 06 through the power splitting coupler 07. The corresponding antenna 08 receives frequency conversion signals such as 2G radio frequency signals, 3G radio frequency signals or 4G radio frequency signals, and then transmits the frequency conversion signals to the second combiner 06 through the power division coupler 07, and the second combiner 06 combines the received multiple frequency conversion signals and feeds the combined signals into the passive room distribution network 05. Among other things, passive indoor networks 05 are typically wired with coaxial cables to transmit high frequency signals.
In the above embodiment, with continued reference to fig. 1, the near-end unit 03 and the far-end unit 09 need to be powered on during the conversion process between the 5G rf signal and the 5G frequency-converted signal. Therefore, the power supply unit 010 can be electrically connected to the near-end unit 03 and the far-end unit 09, respectively, to supply the energy at the time of frequency conversion to the near-end unit 03 and the far-end unit 09, respectively. Meanwhile, the remote machine 09 connected with the power supply can also directly supply power to the antenna module, so that energy loss caused by direct power supply of the second radio remote device 02 or the near-end machine 03 can be avoided.
However, when the 5G mobile network is covered by the above embodiment, the configuration is complicated because the near-end unit 03 needs to be installed between the second radio remote device 02 and the first combiner 04, and power needs to be additionally supplied to the near-end unit 03.
Based on this, as shown in fig. 2, the embodiment of the present invention provides an indoor distribution system. The indoor distribution system comprises first radio frequency remote devices 1 and 5G radio frequency remote devices 2, an access end multi-frequency combiner 3, a passive indoor distribution network 4, an output end multi-frequency combiner 5, a remote end covering module 6 and a power supply module 7.
With continued reference to fig. 2, the first remote radio device 1 corresponds to the first remote radio device 01 in fig. 1. The first remote radio device 1 may be electrically connected to the access-end multi-frequency combiner 3, and may transmit one or more of a 2G radio frequency signal, a 3G radio frequency signal, and a 4G radio frequency signal. And the number of the 5G radio remote devices can be one or a plurality of. The 5G remote radio device 2 is configured to be electrically connected to a 5G indoor baseband processing unit (i.e., a 5G base station, not shown) and transmit a 5G baseband signal, and the 5G remote radio device 2 is configured to convert the 5G baseband signal and the 5G frequency conversion signal. The 5G remote radio unit 2 can also be directly electrically connected to the access-end multi-frequency combiner 3, and can directly transmit 5G frequency-variable signals (i.e. frequency-variable signals with a frequency band of 500MHz to 2700 MHz) therebetween.
The access end multi-frequency combiner 3 is electrically connected with the first remote radio devices 1 and the 5G remote radio devices 2, respectively. Thus, in the downlink direction, the access-end multi-frequency combiner 3 may receive the downlink 5G variable frequency signal sent by the 5G radio remote unit 2, and simultaneously receive at least one of the downlink 2G radio frequency signal, the downlink 3G radio frequency signal, and the downlink 4G radio frequency signal sent by the first radio remote unit 1. Subsequently, access end multifrequency combiner 3 combines the descending frequency conversion signal of above-mentioned multichannel to feed into and transmit in passive room branch network 4 that is connected with access end multifrequency combiner 3 electricity with descending combination signal.
Or, in the uplink direction, the access-end multi-frequency combiner 3 may receive the uplink combined signal transmitted in the passive room sub-network 4, and divide the uplink combined signal through the access-end multi-frequency combiner 3, where the combined signal includes at least one of the uplink 2G radio frequency signal, the uplink 3G radio frequency signal, and the uplink 4G radio frequency signal, and the uplink 5G variable frequency signal. And then, the uplink 5G frequency-converted signal is transmitted to the 5G remote radio unit 2, and other uplink radio signals are transmitted to the corresponding first remote radio unit 1.
As shown in fig. 2, on the far-end covering module 6 side, the far-end covering module 6 may include a first power divider 61, a second power divider 62, a first radio frequency antenna 63, a far-end machine 64, and a second radio frequency antenna 65. One end of the output end multi-frequency combiner 5 may be electrically connected to the passive indoor distribution network 4, and the other end may be electrically connected to the first power divider 61 and the second power divider 62, respectively.
For example, with continued reference to fig. 2, in the downstream direction, the output-side multi-frequency combiner 5 may receive a downstream combined signal transmitted by the passive indoor distribution network 4 and split the combined signal, where the combined signal includes at least one of a downstream 2G radio frequency signal, a downstream 3G radio frequency signal, and a downstream 4G radio frequency signal, and a downstream 5G variable frequency signal. The downlink 5G frequency-converted signals are then transmitted to the second power splitter 62, and the other downlink rf signals are transmitted to the corresponding first power splitter 61. Because the frequency band of 2G radio frequency signal, 3G radio frequency signal and 4G radio frequency signal is 500-2700 MHz, can directly transmit through passive room divides network 05. Thus, the downlink 2G radio frequency signals, the downlink 3G radio frequency signals or the downlink 4G radio frequency signals branched by the output-end multi-frequency combiner 5 can be divided into two downlink radio frequency signals by the first power divider 61, and the two downlink radio frequency signals can be output through the first radio frequency antenna 63 electrically connected with the first power divider 61 respectively, and are covered by the 5G signals, so that the downlink radio frequency signals can be transmitted. For 5G signals, the downlink 5G frequency-converted signals split by the output-end multi-frequency combiner 5 may be connected to a plurality of remote units 64 through the second power splitter 62, and each remote unit 64 is electrically connected to a second rf antenna 65. Thus, after the downlink 5G frequency-converted signal is split by the second power divider 62, the split downlink 5G frequency-converted signal can be restored to the downlink 5G radio frequency signal by each remote terminal 64, and the downlink 5G radio frequency signal can be output through the second radio frequency antenna 65, so as to realize coverage of the 5G signal, that is, to transmit the downlink 5G radio frequency signal.
Alternatively, in the uplink direction, the second rf antenna 65 may receive an uplink 5G rf signal, such as an uplink 5G rf signal sent by a wireless terminal, such as a mobile phone, a locator, and the like. Thus, the remote 64 can receive the uplink 5G rf signal transmitted by the second rf antenna 65, convert the uplink 5G rf signal into an uplink 5G frequency-converted signal, and transmit the uplink 5G frequency-converted signal to the output end multi-frequency combiner 5 through the second power divider 62. Correspondingly, the first rf antenna 63 may also receive an uplink 2G rf signal, an uplink 3G rf signal, or an uplink 4G rf signal sent by the wireless terminal, and then transmit the uplink rf signal to the output end multi-frequency combiner 5 through the first power divider 61. In this way, the output end combines the uplink multiple frequency conversion signals (at least one of the uplink 2G radio frequency signals, the uplink 3G radio frequency signals, and the uplink 4G radio frequency signals, and the uplink 5G frequency conversion signals) from the multi-frequency combiner 5, and then feeds the uplink combined signal into the passive room subnetwork 4.
The embodiment of the utility model provides an indoor distribution system including 5G radio frequency remote device 2 can export the 5G frequency conversion signal that can directly utilize passive room to divide network 4 to carry out the transmission through 5G radio frequency remote device to make the higher 5G mobile network of radio frequency channel can directly utilize the indoor branch system realization 5G signal of present net to cover. Compared with the prior art, the utility model discloses technical scheme need not additionally to set up near-end machine between 5G radio frequency remote device 2 and access end multifrequency combiner 3, has reduced the quantity of use equipment when 5G signal covers among the indoor distribution system, is favorable to reducing the cost of establishing the network. And, because the near-end machine is the active equipment who is used for the radio frequency signal frequency conversion, need consume the operation that the electric energy maintained the equipment promptly, consequently, the embodiment of the utility model provides an indoor distribution system still is favorable to reducing the operation consumption of entire system equipment, and is more energy-conserving.
Therefore, in the embodiment of the present invention, with reference to fig. 2, the power supply module 7 can be electrically connected to a plurality of remote units 64 respectively, so as to provide power for frequency conversion between the 5G radio frequency signal and the 5G frequency conversion signal in the remote units 64, thereby ensuring stable operation of the device. In addition, through the remote terminal 64, the power supply module 7 may also amplify the branched 5G radio frequency signal, so as to improve the coverage strength of the 5G signal of the second radio frequency antenna 65.
In some embodiments, one remote coverage module 6 may be provided in each floor of indoor space or area of a preset range, and the remote coverage module 6 may include three remote machines 64, three second rf antennas 65, and two second power dividers 62. In the downlink direction, each second power divider 62 may divide one downlink 5G frequency conversion signal into two downlink 5G frequency conversion signals, so that two second power dividers 62 connected in series may divide three downlink 5G frequency conversion signals, and perform 5G signal coverage via the second rf antenna 65 after being converted by the three remote terminals 64.
In the above embodiment, the second power divider 62 may also be a three-way power divider. Thus, in the downstream direction, the second power splitter 62 has one input and three outputs. In this case, only one second power divider 62 is required.
Still alternatively, each remote-covering module 6 may include a remote machine 64 and a second radio-frequency antenna 65. Thus, the second rf antenna 65 may be directly connected to the output-side multi-band combiner 5 through the remote terminal 64.
Therefore, in the embodiment of the present invention, the number of remote units 64 and the number of second rf antennas 65 in the remote coverage module 6 may be one, two, three or more. Generally, the number of remote units 64 may be equal to the number of second rf antennas 65, or each remote unit 64 may be electrically connected to two or three second rf antennas 65. When the second power divider 62 has a two-power division structure, the number of the second power dividers 62 is one less than that of the remote terminals 64; when the second power divider 62 is a three-power divider structure, the number of the second power dividers 62 is two less than the number of the remote terminals 64. And is not limited herein.
It should be noted that, in the embodiment of the present invention, the Radio Remote Unit may be an RRU, or may be a pRRU (Pico Remote Radio Unit). The Radio remote unit and the baseband processing unit generally transmit baseband signals through a Common Public Radio Interface (CPRI) protocol or an enhanced Common Radio Interface (eCPRI) protocol. The utility model discloses do not limit to this.
As shown in fig. 3, for example, the 5G remote radio device 2 may include a baseband port 21, an intermediate frequency module 22, a radio frequency module 23, a first mixer 24, and a radio frequency port 25, which are electrically connected in sequence.
In the downlink direction, the baseband port 21 is used for connecting a 5G baseband processing unit (not shown in the figure) and receiving a downlink baseband signal transmitted by the 5G baseband processing unit. Illustratively, the baseband port 21 and the 5G baseband processing unit may carry and transmit a downlink 5G baseband signal through an optical fiber signal, the corresponding baseband port 21 is an optical module, and the baseband port 21 may analyze and output the downlink 5G baseband signal from the optical fiber signal, which is generally a digital signal. Subsequently, the intermediate frequency module 22 receives the downlink 5G baseband signal, and the intermediate frequency module 22 converts the downlink 5G baseband signal into a downlink 5G intermediate frequency signal, which is generally a digital signal, and outputs the downlink 5G intermediate frequency signal. Then, the rf module 23 receives the downlink 5G intermediate frequency signal, and the rf module 23 converts the downlink 5G intermediate frequency signal into a downlink 5G rf signal and outputs the downlink 5G rf signal. The first mixer 24 receives the downstream 5G rf signal, and the first mixer 24 converts the downstream 5G rf signal into a 5G frequency-converted signal and outputs the 5G frequency-converted signal. The rf port 25 may receive and transmit the 5G frequency-converted signal, generally transmit the 5G frequency-converted signal through a coaxial cable, or may be directly electrically connected to the access-end multi-frequency combiner 3.
In addition, in the uplink direction, the rf port 25 may receive the uplink 5G frequency-converted signal output by the access-end multi-frequency combiner 3 and transmit the received signal to the first mixer 24. The first mixer 24 may convert the uplink 5G frequency-converted signal into an uplink 5G rf signal, and transmit the signal to the rf module 23. The rf module 23 may convert the uplink 5G rf signal into an uplink 5G if signal, and transmit the uplink 5G if signal to the if module 22. The intermediate frequency module 22 may convert the uplink 5G intermediate frequency signal into an uplink 5G baseband signal, and finally, the uplink 5G baseband signal is carried by the baseband port 21 through the optical fiber signal and transmitted to a 5G baseband processing unit (i.e., a base station) for connecting to a metropolitan area network.
Therefore, the embodiment of the utility model provides a 5G radio frequency remote device 2 can be used for indoor distribution system's signal to cover, because the function of the remote machine that 5G radio frequency remote device 2 integrated radio frequency remote device and fell frequency simultaneously need not additionally to set up the remote machine, has higher integrated level. In addition, the scheme only needs to add the first frequency mixer 24 for frequency conversion in the radio remote device 2, no additional change is needed, the structure is simple, and the function is practical.
In some embodiments, as shown in fig. 4, the 5G remote radio apparatus 2 may further include a near-end covering module 26, and the near-end covering module 26 may include a third power divider 261 and a third rf antenna 262. Illustratively, the third power divider 261 is installed between the rf module 23 and the first mixer 24, and in the downlink direction, an input end and one output end of the third power divider 261 are electrically connected to the rf module 23 and the first mixer 24, respectively, and the other output end of the third power divider 261 is electrically connected to the third rf antenna 262. In this way, the third power divider 261 and the rf module 23 may transmit a 5G rf signal therebetween, and the third power divider 261 divides the 5G rf signal into multiple paths of 5G rf signals through a power divider or a coupler. One of the 5G rf signals is transmitted between the third power divider 261 and the first mixer 24, and the other 5G rf signals is transmitted between the third power divider 261 and the third rf antenna 262, and the 5G signal coverage is implemented by the third rf antenna 262.
Therefore, the 5G rf remote device can perform 5G signal coverage through the third rf antenna 262 in the near-end coverage module 26. For example, the 5G signal coverage can be directly carried out on the regional space near the 5G radio remote device without utilizing an indoor distribution network. The embodiment of the utility model provides a 5G radio frequency is drawn far device can be used for near regional 5G signal cover of self, also can pass through indoor distribution network output 5G frequency conversion signal simultaneously to satisfy other regional 5G signal covers. Simple structure and wide application.
Illustratively, the proximal cover module 26 may include a third power splitter 261 and a radio frequency antenna 262. At this time, the third power divider 261 may be a passive power divider or a passive coupler, so as to convert one path of 5G radio frequency signal between the first power divider and the radio frequency module 23 into two paths of 5G radio frequency signals, where one path is transmitted with the first mixer 24, and the other path is transmitted with the third radio frequency antenna 262, so as to implement 5G signal coverage near the 5G radio frequency remote unit.
Alternatively, the proximal end covering module 26 may also include a plurality of third power dividers 261 and a plurality of rf antennas 262. At this time, the third power divider 261 may be a power divider or a coupler with two power divisions. Between the rf module 23 and the first mixer 25, a plurality of third power dividers 261 are electrically connected in sequence, and each third power divider 261 is further electrically connected to a third rf antenna 262, so as to implement multi-path 5G signal coverage near the 5G remote rf device.
Alternatively, the proximal cover module 26 may also include a third power splitter 261 and a plurality of rf antennas 262. At this time, the third power divider 261 may be a power divider or a coupler with three power divisions, four power divisions, or five power divisions or even more. In the downlink direction, the input end of the third power divider 261 is electrically connected to the rf module 23, one of the output ends is electrically connected to the first mixer 24, and the other output ends of the third power divider 261 are electrically connected to one rf antenna 262, respectively, so that multi-path 5G signal coverage near the 5G remote radio apparatus can also be achieved.
It should be noted that, in the two embodiments in which the third rf antenna 262 is multiple, the third power divider 261 is generally an active power divider or an active coupler, so that the branched 5G rf signal has sufficient signal strength, so that the third rf antenna 262 has higher 5G signal coverage strength. The power divider generally refers to a power divider capable of equally dividing one path of signal, and the coupler generally refers to a power divider capable of dividing one path of signal according to a preset proportion. In addition, in the remote covering module 6, since the remote machine 64 can be electrically connected to the power supply module 7, the first power splitter 61 may be an active device or a passive device, which is not limited herein.
The 5G remote radio device 2 may be a single-channel remote radio device. For example, a 5G frequency-variable signal of one frequency band is generally transmitted between the 5G radio remote unit 2 and the access-end multi-frequency combiner 3. In addition, in order to increase the channel capacity, the 5G remote radio apparatus 2 may also be a multi-channel remote radio apparatus. For example, two, three or more frequency bands of 5G frequency-converted signals can be transmitted between the 5G remote radio unit 2 and the access-end multi-frequency combiner 3, so that the channel capacity is increased by channels of multiple frequency bands. For example, in the downlink direction, the first mixer 24 electrically connected to the radio frequency module 23 or the third power divider 261 may access a downlink 5G radio frequency signal with a frequency band of 3500MHz to 3600MHz, convert the downlink 5G radio frequency signal into two downlink 5G variable frequency signals with frequency bands of 1100MHz to 1200MHz and 500MHz to 600MHz, and output the two downlink 5G variable frequency signals to the passive indoor distribution network 4 after being combined by the access-end multi-frequency combiner 3.
Correspondingly, in the far-end covering module 6, the far-end machine 64 may receive two downlink 5G frequency conversion signals, that is, two downlink 5G frequency conversion signals with frequency bands of 1100MHz to 1200MHz and 500MHz to 600MHz, through the output-end multi-frequency combiner 5 and the second power divider 62. And the remote machine 64 can convert the two downlink 5G frequency-converted signals into two corresponding 5G radio frequency signals respectively, amplify the signals, and output the signals through the two second radio frequency antennas 65 to perform 5G signal coverage.
In some embodiments, as shown in fig. 5, the intermediate frequency module 22 may include a digital up-converter 221 and a digital down-converter 222. The corresponding rf module may include a digital module converter 231, a second mixer 232, a power amplifier 233, a duplexer 234, an analog-to-digital converter 235, a third mixer 236, and a low noise amplifier 237.
Referring to fig. 5, for example, in the downlink direction, the digital up-converter 221 may be electrically connected to the baseband port 21 (shown in fig. 3) to receive the downlink 5G baseband signal, perform up-conversion processing on the downlink 5G baseband signal, and convert the downlink 5G baseband signal into a downlink 5G intermediate frequency signal for output. The digital up converter 221 and the duplexer 234 are electrically connected to each other via a digital-to-analog converter 231, a second mixer 232, and a signal amplifier 231. The digital-to-analog converter 231 may receive the downlink 5G intermediate frequency signal and convert the downlink 5G intermediate frequency signal into a downlink analog signal. The second mixer 232 may receive the downstream analog signal for frequency up-conversion and convert it to a 5G rf signal. And the power amplifier 233 may receive the 5G rf signal and amplify the signal and output the amplified signal to the first mixing port 24 or the third power divider 261 (shown in fig. 4) through the duplexer 234.
With continued reference to fig. 5, in the uplink direction, the duplexer 234 is electrically connected to the lna 237, the third mixer 236, the adc 235, and the digital down-converter 222 in sequence. The duplexer 234 receives the uplink 5G rf signal from the first mixing port 24 or the third power divider 261, and transmits the received signal to the lna 237. The lna 237 amplifies the uplink 5G rf signal and transmits the amplified signal to the third mixer 236. The third mixer 236 may down-convert the amplified uplink 5G radio frequency signal and convert the down-converted signal into an uplink analog signal for output. The analog-to-digital converter 235 may receive the analog signal of the uplink and convert it into an uplink 5G intermediate frequency signal (digital signal) for output. Digital down converter 222 may receive the upstream 5G intermediate frequency signal and convert it to an upstream 5G baseband signal. And a digital down converter 222 is used to transmit the upstream 5G baseband signal to the baseband port 21.
In this way, for the 5G remote radio apparatus 2, in the process of converting the 5G baseband signal into the 5G radio frequency signal, the 5G intermediate frequency signal processed by the digital up-converter 221 and the digital down-converter 222 in the intermediate frequency module 22 is beneficial to make the converted 5G radio frequency signal have a higher frequency. The duplexer 234 is a device that can isolate the uplink signal and the downlink signal from each other, and ensure that both the uplink signal and the downlink signal can be transmitted normally at the same time. The duplexer 234 is typically comprised of two sets of band reject filters of different frequencies. So that the downlink 5G rf signal output by the power amplifier 233 can be transmitted to the first mixing port 24 or the third power divider 261 through the duplexer 234, and the uplink 5G rf signal transmitted by the first mixing port 24 or the third power divider 261 can be received by the lna 237 through the duplexer 234.
In some embodiments, as shown in fig. 6, in the downstream direction, the intermediate frequency module 22 may further include a digital filter 223 and a digital predistorter 224, and the corresponding rf module 23 may further include a first band-pass filter 238. Illustratively, the digital filter 223 and the digital predistorter 224 may be installed between the digital up-converter 221 and the digital-to-analog converter 231, the digital filter 223 is electrically connected to the digital up-converter 221 and the digital predistorter 224, respectively, and the digital predistorter 224 is also electrically connected to the digital-to-analog converter. The first band-pass filter 238 is installed between the second mixer 232 and the power amplifier 233, and the first band-pass filter 238 is electrically connected to the second mixer 232 and the power amplifier 233, respectively.
Since the intermediate frequency signal generally has a large Peak to Average Ratio (PAR) and generally conforms to a gaussian distribution. However, the linear range of the power amplifier 233 is limited, i.e. the intermediate frequency signal with larger peak-to-average ratio will reduce the operating range of the power amplifier 233, thereby reducing the operating efficiency of the power amplifier 233. Therefore, the digital filter 223 may be connected after the digital down converter 221 for peak trimming or peak reduction to reduce the peak ratio, which is beneficial to ensure the linearity of the output of the power amplifier 233, reduce out-of-band radiation, and improve the operating efficiency of the power amplifier 233.
The digital predistorter 224 is configured to perform predistortion processing on the intermediate frequency signal, which is beneficial to correct the nonlinear characteristic of the power amplifier 233, so that the power amplifier 233 can output a 5G radio frequency signal with higher linearity. The first band-pass filter 238 can filter the rf signal before being input to the power amplifier 233, so as to pass the high frequency analog signal in a specific frequency range (frequency band), and filter out the undesired frequency range, so as to obtain the desired 5G rf signal, so that the power amplifier 233 can amplify and output the 5G rf signal.
Correspondingly, as shown in fig. 7, in the uplink direction, the rf module 23 may further include a second band-pass filter 239, a low signal-to-noise amplifier 237, a third mixer 236, and an analog-to-digital converter 235 that are electrically connected in sequence. Referring to fig. 5, the second band pass filter 239 is disposed between the duplexer 234 and the lna 237, and is electrically connected to the duplexer 234 and the lna 237, respectively. In this way, the second band-pass filter 239 can filter the rf signal before the lna 237, so as to pass the high-frequency analog signal in a specific frequency range (frequency band), and filter out the unnecessary frequency range, so as to obtain the required 5G rf signal, so that the lna 237 amplifies the 5G rf signal and outputs the signal to the third mixer 236.
In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A5G radio remote device, comprising:
the baseband port is used for connecting the 5G baseband processing unit;
the intermediate frequency module is electrically connected with the baseband port and is used for transmitting a 5G baseband signal, and the intermediate frequency module is used for converting the 5G baseband signal and the 5G intermediate frequency signal;
the radio frequency module is electrically connected with the intermediate frequency module and is used for converting the 5G intermediate frequency signal and the 5G radio frequency signal;
the first mixer is electrically connected with the radio frequency module and used for converting the 5G radio frequency signal and the 5G variable frequency signal; the frequency band of the 5G frequency conversion signal is the same as the frequency band of the signal supported by the indoor distribution system of the existing network for transmission, and the frequency band of the 5G radio frequency signal is greater than the frequency band of the 5G frequency conversion signal; and the number of the first and second groups,
and the radio frequency port is electrically connected with the first mixer and transmits the 5G frequency conversion signal.
2. The remote radio-frequency-pulling 5G device according to claim 1, wherein the remote radio-frequency-pulling 5G device further comprises at least one proximal end covering module, and the proximal end covering module comprises:
the third power divider is arranged between the radio frequency module and the first frequency mixer and is respectively and electrically connected with the radio frequency module and the first frequency mixer; the third power divider and the radio frequency module perform signal transmission through the 5G radio frequency signal, and the third power divider is configured to convert the 5G radio frequency signal between the third power divider and the radio frequency module into multiple paths of the 5G radio frequency signal; the third power divider and the first mixer perform signal transmission through one path of the 5G radio frequency signals; and the number of the first and second groups,
a third radio frequency antenna electrically connected to the third power divider; and the third radio frequency antenna and the third power divider perform signal transmission through the other path of the 5G radio frequency signal, and perform 5G signal coverage through the third radio frequency antenna.
3. The 5G radio remote unit according to claim 2, wherein the third power divider is a passive power divider or a passive coupler.
4. The 5G remote radio-frequency device according to claim 2, wherein the near-end covering module comprises a plurality of third radio-frequency antennas;
each of the third rf antennas is electrically connected to the rf module through one of the third power dividers.
5. The 5G remote radio unit according to claim 1, wherein the first mixer is a multi-channel mixer for converting the 5G radio frequency signal and the 5G frequency-converted signal.
6. The 5G radio remote unit according to any one of claims 1-5, wherein the intermediate frequency module comprises a digital up-converter and a digital down-converter; the digital up-converter is electrically connected with the baseband port and is used for receiving the 5G baseband signal and outputting the 5G intermediate frequency signal; the digital down converter is electrically connected with the baseband port and is used for receiving the 5G intermediate frequency signal and outputting the 5G baseband signal;
the radio frequency module comprises a digital-to-analog converter, an analog-to-digital converter, a second mixer, a third mixer, a power amplifier, a low-noise amplifier and a duplexer; the digital-analog converter, the second mixer and the power amplifier are electrically connected between the digital up-converter and the duplexer in sequence; the analog-digital converter, the third mixer and the low signal noise amplifier are electrically connected between the digital down converter and the duplexer in sequence; the duplexer is also used for being electrically connected with the first mixer and transmitting the 5G radio frequency signal.
7. The 5G radio remote unit according to claim 6, wherein the intermediate frequency module further comprises a digital filter and a digital predistorter installed between the digital up-converter and the analog-to-digital converter; the digital filter is electrically connected with the digital up-converter and the digital predistorter respectively, and the digital predistorter is also electrically connected with the analog-digital converter;
the radio frequency module further comprises a first band-pass filter and a second band-pass filter; the first band-pass filter is arranged between the second mixer and the power amplifier and is respectively and electrically connected with the second mixer and the power amplifier; the second band-pass filter is installed between the low-noise amplifier and the duplexer and is respectively electrically connected with the low-noise amplifier and the duplexer.
8. An indoor distribution system, comprising:
the 5G radio remote device of any one of claims 1-7;
the access end multi-frequency combiner is electrically connected with the radio frequency port and transmits the 5G variable frequency signal; the access end multi-frequency combiner is used for converting the 5G variable frequency signal and a combined signal;
a passive room distribution network;
the output end multi-frequency combiner is electrically connected with the access end multi-frequency combiner through the passive chamber sub-network, and the output end multi-frequency combiner and the access end multi-frequency combiner perform signal transmission through the combined signal; the output end multi-frequency combiner is used for converting the combined signal and the 5G radio frequency signal; and (c) a second step of,
the remote covering module comprises at least one remote machine and at least one second radio frequency antenna; the far-end machine is used for being electrically connected with the output end multi-frequency combiner and transmitting the 5G frequency conversion signal, and is also used for converting the 5G frequency conversion signal and the 5G radio frequency signal; each second radio frequency antenna is electrically connected with one remote machine and transmits the 5G radio frequency signals, and 5G signal coverage is carried out through the second radio frequency antenna.
9. The indoor distribution system of claim 8, wherein the number of remote units and the second RF antennas is plural;
the far-end covering module further comprises a second power divider, and each far-end machine is electrically connected with the output end multi-frequency combiner through the second power divider.
10. The indoor distribution system of claim 8, further comprising a power module for separately powering each of the remote units.
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| CN202220794888.0U CN217656751U (en) | 2022-04-06 | 2022-04-06 | 5G radio frequency remote device and indoor distribution system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116032341A (en) * | 2023-03-09 | 2023-04-28 | 深圳国人无线通信有限公司 | Configuration method of base station parameters and base station |
| CN117156448A (en) * | 2023-11-01 | 2023-12-01 | 中国铁塔股份有限公司 | Signal transmission method, device and medium |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116032341A (en) * | 2023-03-09 | 2023-04-28 | 深圳国人无线通信有限公司 | Configuration method of base station parameters and base station |
| CN117156448A (en) * | 2023-11-01 | 2023-12-01 | 中国铁塔股份有限公司 | Signal transmission method, device and medium |
| CN117156448B (en) * | 2023-11-01 | 2024-01-30 | 中国铁塔股份有限公司 | Signal transmission method, device and medium |
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