CN116419190A

CN116419190A - Remote radio unit, antenna switching method and device, medium and electronic equipment

Info

Publication number: CN116419190A
Application number: CN202111655937.9A
Authority: CN
Inventors: 王果; 刘洋; 刘海涛; 杨涛; 杨峰义
Original assignee: China Telecom Corp Ltd
Current assignee: China Telecom Corp Ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2023-07-11

Abstract

The disclosure provides a remote radio unit, an antenna switching method, a device, a medium and electronic equipment, and relates to the technical field of communication. The remote radio frequency unit comprises a first level control switch unit, an internal antenna, an external radio frequency port and a power divider; the built-in antenna is connected with a first output port of the first level control switch unit; the input port of the power divider is connected with the second output port of the first level control switch unit, and a plurality of output ports of the power divider are respectively connected with the internal antenna and the external radio frequency port; the first level control switch unit receives radio frequency signals through an input port of the first level control switch unit, and controls the radio frequency signals to be output from a first output port or a second output port based on the high level and the low level of the central control signal; the power divider outputs the radio frequency signals received from the input ports to the internal antenna and the external radio frequency port through a plurality of output ports. The embodiment of the disclosure can avoid the waste of the unloaded external radio frequency port power and the damage of the circuit board by the reflected signal.

Description

Remote radio unit, antenna switching method and device, medium and electronic equipment

Technical Field

The disclosure relates to the field of communication technologies, and in particular, to a remote radio unit, an antenna switching method, a device, a medium and an electronic device.

Background

In the 5G era, 80% of flow is expected to occur indoors, and the indoor scene coverage requirement is high, so that the 5G indoor coverage is a key problem which needs to be solved urgently and has great significance. In order to provide high performance gain and better mobile bandwidth user experience, the current 5G indoor coverage mainly adopts a three-level architecture of an active extended small station, as shown in fig. 8, including a Baseband processing Unit (BBU), a switch (HUB), and a remote radio Unit (RRU, radio Remote Unit).

Meanwhile, in order to fully utilize the indoor passive distributed antenna system (DAS, distributed Antenna System) in the old 4G era, the respective advantages of an active scheme and a passive scheme are integrated, the coverage effect is guaranteed, the coverage cost is further reduced, and some RRU models are provided with an external antenna radio frequency port to serve as information source input of the DAS system; such RRU, which can radiate wireless signals through the internal antenna while being externally connected with the passive remote antenna, is referred to in the industry as a three-point RRU, as shown in fig. 9. In general, the three-point RRU is formed by embedding a power divider based on the RRU which only comprises a built-in antenna; after the design is finished, the hardware circuit board cannot be changed, so that the RRU adopting the design mode has high practical value and outstanding advantages only when the RRU is required to be used as a room division source and an active room division tail end of a passive DAS system. For the scene that only the built-in antenna is needed to cover, and the built-in antenna is not needed to be used as an information source to input an external remote passive antenna, the three-point RRU embedded with the power divider can be adapted, but because the power of a transmitting signal in the RRU is reduced in proportion after the internal transmitting link of the RRU passes through the power divider, the coverage area of the RRU is also greatly reduced, and the power of a radio frequency port without the external remote antenna is wasted. In addition, since the radio frequency port is not externally connected with an antenna, the radio frequency port is equivalent to an unattached load, and is in an idle open circuit state, radio frequency signals are reflected back to the RRU circuit board, and the voltage observed from the transmitter device can be 2 times of the current voltage in severe cases, so that circuit damage and even device burning are possibly caused.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

The disclosure provides a remote radio unit, an antenna switching method, a device, a medium and electronic equipment, which at least overcome the problems that radio frequency port power of an external remote antenna is wasted and a device is damaged by radio frequency signal reflection in the related art to a certain extent.

Other features and advantages of the present disclosure will be apparent from the following detailed description, or may be learned in part by the practice of the disclosure.

According to one aspect of the present disclosure, there is provided a remote radio unit comprising a first level control switch module comprising:

a first level control switch unit having an input port, a first output port, and a second output port;

the built-in antenna is connected with a first output port of the first level control switch unit;

an external radio frequency port;

the input port of the power divider is connected with the second output port of the first level control switch unit, and a plurality of output ports of the power divider are respectively connected with the internal antenna and the external radio frequency port;

The first level control switch unit receives a radio frequency signal (RF) through an input port, and controls the radio frequency signal to be output from a first output port or a second output port based on the high level and the low level of the central control signal;

the power divider is used for outputting radio frequency signals received from an input port to the internal antenna and the external radio frequency port through the plurality of output ports.

In one embodiment of the disclosure, the power divider is a two-part power divider, and includes 2 output ports respectively connected to the internal antenna and the external radio frequency port;

or (b)

The power divider is a three-division power divider and comprises 3 output ports which are respectively connected with the internal antenna and the 2 external radio frequency ports.

In one embodiment of the present disclosure, 2 of the first level control switch modules are included.

In one embodiment of the present disclosure, further comprising:

the second level control switch unit is a multi-input multi-output unit, one end of the second level control switch unit is connected with the ground wire, and the other end of the second level control switch unit is connected with the external radio frequency port;

the second level control switch unit is used for connecting the external radio frequency port with the ground wire based on the central control signal.

According to another aspect of the present disclosure, there is also provided an antenna switching method, including:

the first level control switch unit receives a radio frequency signal and a central control signal, wherein the central control signal is a control signal sent by the central control unit;

the first level control switch unit controls the radio frequency signal to be output to the internal antenna only or to the internal antenna and the external antenna according to the central control signal.

In one embodiment of the present disclosure, further comprising:

the second level control switch unit receives a feedback signal sent by an external radio frequency port which is not externally connected with an antenna;

the second level control switch unit short-circuits the feedback signal to a ground terminal.

In one embodiment of the disclosure, the controlling, by the first level control switch unit, the radio frequency signal to be output to only the internal antenna or to the internal antenna and the external antenna according to the central control signal includes:

the first level control switch unit controls the radio frequency signal to be output to a power divider according to the central control signal;

the power divider distributes power to an internal antenna or an external radio frequency port;

the external radio frequency port is connected with the external antenna.

In one embodiment of the present disclosure, further comprising:

establishing an index table of the central control signal, the internal antenna, the power divider and the external radio frequency port;

and acquiring the central control signal, and controlling the states of the internal antenna, the power divider and the external radio frequency port according to the index table.

In one embodiment of the present disclosure, further comprising: the second level control switch unit receives the control signal sent by the central control unit.

In one embodiment of the present disclosure, the central control signal is a high-low level signal.

In one embodiment of the present disclosure, the central control unit is an ARM or FPGA.

According to another aspect of the present disclosure, there is also provided an antenna switching apparatus including:

the signal receiving module is used for receiving the radio frequency signal and the central control signal by the first level control switch unit, wherein the central control signal is a control signal sent by the central control unit;

and the signal output module is used for controlling the radio frequency signal to be output to the internal antenna only or to the internal antenna and the external antenna according to the central control signal by the first level control switch unit.

In one embodiment of the present disclosure, further comprising:

the signal feedback module is used for receiving a feedback signal sent by an external radio frequency port which is not externally connected with an antenna by the second level control switch unit;

And the second level control switch unit is used for shorting the feedback signal to the grounding end.

According to another aspect of the present disclosure, there is also provided an electronic apparatus including: a processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to perform any of the antenna switching methods described above via execution of the executable instructions.

According to another aspect of the present disclosure, there is also provided a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the antenna switching method of any one of the above.

The embodiment of the disclosure provides a remote radio unit, an antenna switching method, a device, a medium and electronic equipment, and relates to the technical field of communication. The remote radio frequency unit comprises a first level control switch unit, an internal antenna, an external radio frequency port and a power divider; the built-in antenna is connected with a first output port of the first level control switch unit; the input port of the power divider is connected with the second output port of the first level control switch unit, and a plurality of output ports of the power divider are respectively connected with the internal antenna and the external radio frequency port; the first level control switch unit receives radio frequency signals through an input port of the first level control switch unit, and controls the radio frequency signals to be output from a first output port or a second output port based on the high level and the low level of the central control signal; the power divider outputs the radio frequency signals received from the input ports to the internal antenna and the external radio frequency port through a plurality of output ports. The embodiment of the disclosure can avoid the waste of the unloaded external radio frequency port power and the damage of the circuit board by the reflected signal.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.

Fig. 1 is a schematic diagram of a remote radio unit according to an embodiment of the disclosure;

fig. 2 is a signal flow diagram of a built-in remote radio unit according to an embodiment of the disclosure;

FIG. 3 is a schematic diagram of a remote radio unit with both built-in and external connections according to an embodiment of the disclosure;

FIG. 4 illustrates a feedback signal ground schematic in an embodiment of the present disclosure;

fig. 5 is a schematic diagram of an antenna switching method according to an embodiment of the disclosure;

FIG. 6 illustrates a schematic diagram of controlling the output of a radio frequency signal according to a central control signal in an embodiment of the disclosure;

fig. 7 shows a schematic diagram of an antenna switching device in an embodiment of the disclosure;

FIG. 8 shows a schematic diagram of a three-level architecture of an active extended substation in the related art;

fig. 9 shows a schematic diagram of a three-point RRU in the related art; and

fig. 10 shows a block diagram of an electronic device in an embodiment of the disclosure.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus a repetitive description thereof will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in software or in one or more hardware modules or integrated circuits or in different networks and/or processor devices and/or microcontroller devices.

For ease of understanding, the following first explains the several terms involved in this disclosure as follows:

the RRU (Radio Remote Unit, remote radio unit) is that the transceiver module finishes the conversion from the intermediate frequency signal to the radio frequency signal; and then the radio frequency signals are transmitted out through the antenna port by the power amplification and filtering module.

The BBU (Baseband Unit, indoor Baseband processing Unit) is a distributed base station architecture used by 3G network in large quantity, and the RRU and the BBU need to be connected by optical fibers; one BBU may support multiple RRUs; the indoor coverage of a large venue can be well solved by adopting a BBU+RRU multichannel scheme.

The present exemplary embodiment will be described in detail below with reference to the accompanying drawings and examples.

Fig. 1 shows a schematic diagram of a remote radio unit in an embodiment of the present disclosure, as shown in fig. 1, where the remote radio unit provided in the embodiment of the present disclosure includes: the first level control switch module, the internal antenna, the external radio frequency port and the power divider;

the first level control switch module includes: a first level control switch unit 101 having an input port, a first output port, and a second output port;

a built-in antenna connected to a first output port of the first level control switch unit 101;

The input port of the power divider is connected with the second output port of the first level control switch unit 101, and a plurality of output ports of the power divider are respectively connected with the internal antenna and the external radio frequency port;

the first level control switch unit 101 receives a radio frequency signal (RF) through an input port, and controls the output of the radio frequency signal from the first output port or the second output port based on the high and low levels of the central control signal; the power divider is used for outputting the radio frequency signals received from the input ports to the internal antenna and the external radio frequency port through the plurality of output ports.

In one embodiment, the power divider may be a two-way power divider, a three-way power divider, or the like, without limitation.

In one embodiment, the power divider is a two-part power divider and comprises 2 output ports which are respectively connected with an internal antenna and an external radio frequency port;

in another embodiment, the power divider is a three-way power divider, and includes 3 output ports respectively connected to the internal antenna and 2 external radio frequency ports.

In one embodiment, a plurality of first level control switch modules may be included, without limitation.

In the above embodiment, the requirements of various scenes can be satisfied; from the cost perspective, the coverage scene with various requirements can be adapted, and the reconfigurability of the coverage scene reduces the network construction coverage cost; from the design point of view, only a certain number of level control switch units and feedback leads are added, so that the circuit design and platemaking are changed little; from the resource perspective, only the limited control signals of the central control unit are consumed; from the safety aspect, since the external radio frequency port is connected with the control unit through the feedback line, if the external radio frequency port is not connected with the antenna, the radio frequency reflection signal is directly led to be grounded, and the device is not damaged.

In one embodiment, the description is given taking 2 first level control switch modules and the power divider as three power dividers as an example. The remote radio unit comprises:

2 first level control switch modules; the 2 first level control switch modules include: 2 first level control switch units 101; the first level control switch unit 101 has an input port, a first output port, and a second output port;

a first internal antenna 104 and a second internal antenna 105; the first built-in antenna 104 is connected with a first output port of the first level control switch unit 101; the second built-in antenna 105 is connected to the first output port of the first level control switch unit 101;

the input port of the first power divider 102 is connected with the second output port of the first level control switch unit 101, and the 3 output ports of the first power divider 102 are respectively connected with the first internal antenna 104, the first external radio frequency port 106 and the third external radio frequency port 108; the input port of the second power divider 103 is connected with the second output port of the first level control switch unit 101, and the 3 output ports of the second power divider 103 are respectively connected with the second built-in antenna 105, the second external radio frequency port 107 and the fourth external radio frequency port 109;

The first level control switch unit 101 receives the radio frequency signal RF0 through the input port, and controls the radio frequency signal RF0 to be output from the first output port or the second output port based on the high and low levels of the central control signal 0; the first power divider 102 is configured to output the radio frequency signal RF0 received from the input port to the first internal antenna 104, the first external radio frequency port 106, and the third external radio frequency port 108 through 3 output ports.

The first level control switch unit 101 receives the radio frequency signal RF1 through the input port, and controls the radio frequency signal RF1 to be output from the first output port or the second output port based on the high and low levels of the central control signal 1; the second power divider 103 is configured to output the radio frequency signal RF1 received from the input port to the second internal antenna 105 and the second external radio frequency port 107, and the fourth external radio frequency port 109 through 3 output ports.

In one embodiment, the three-point position is reconfigurable into two functional modes by a first level control switch module. The first is the built-in only type, and as the "active chamber end", the 2-way central control signal in this mode directly outputs the output power signal of the first level control switch unit 101 to the first built-in antenna 104 and the second built-in antenna 105, and the output signal is the signal power of the radio frequency signal RF0 and the radio frequency signal RF1 after canceling the weak loss value of the first level control switch unit 101.

The second mode is that the built-in type and the external type work simultaneously and are used as an 'active chamber division end' and a 'passive chamber division information source', in the mode, 2 paths of central control signals control a radio frequency signal RF0 and a radio frequency signal RF1 to be output to a power divider, and the power divider is distributed to an internal antenna and an external radio frequency port through equal power.

In one embodiment, the 2-way central control signal simultaneously controls the two groups of first level control switch units 101, so that the control of high-low level signals can be reasonably and skillfully designed, and one embodiment is given in table 1. The four radio frequency ports can be divided into two groups, wherein the first radio frequency group is a first external radio frequency port 106 and a second external radio frequency port 107, and the second radio frequency group is a third external radio frequency port 108 and a fourth external radio frequency port 109; as shown in table 1, when the three-point RRU is only the "active chamber end", an index 0 control sequence is employed; when the three-point RRU has an active indoor branch end and a passive indoor branch information source, and all external radio frequency ports are externally connected with antennas, an index 1 control sequence can be adopted; when the three-point RRU has both an active indoor branch end and a passive indoor branch information source, but the first radio frequency group is not externally connected with an antenna, an index 2 control sequence can be adopted; when the three-point RRU has both an "active indoor end" and a "passive indoor source", but the second radio frequency group is not externally connected to the antenna, an index 3 control sequence may be used. Table 1 shows a central control signal control table. Where "Γ" indicates a signal input terminal and "×" indicates signal blocking.

Table 1 central control signal control table

In the above embodiment, the first level control switch module is introduced during circuit design, and the switching of the internal antenna and the external antenna is controlled by using high-low level signals through the central control unit, such as an ARM or an FPGA; when the external passive remote antenna is required, the functional mode of the three-point RRU is presented; when an external passive remote antenna is not needed, switching to a working mode of only the built-in antenna, and radiating all RRU transmitter power through the built-in antenna; the remote radio frequency unit can quickly adjust the configuration of the remote radio frequency unit in response to task demands, so that the remote radio frequency unit can adapt to more indoor wireless coverage scenes, namely, can better adapt to scenes only serving as 'active indoor terminal ends', and has both 'active indoor terminal ends' and 'passive indoor terminal information sources'.

In one embodiment, a remote radio unit includes a second level control switch unit 106, where the second level control switch unit 106 is a multiple-input multiple-output unit, and one end of the second level control switch unit is connected to a ground line, and the other end of the second level control switch unit is connected to an external radio port; the second level control switch unit 106 is configured to connect the external rf port to a ground line based on the central control signal.

In one embodiment, the remote radio unit includes one or more second level control switch units 106, and the disclosed embodiment is described with reference to one second level control switch unit 106.

In one embodiment, the second level control switch unit 106 is a multiple-input multiple-output unit, and is controlled by 2-way control signals: the central control signal 0 and the central control signal 1 simultaneously control which paths of input signals are output from the output ports.

In the above embodiment, the second level control switch unit 106 is configured to directly short-circuit the feedback signal that may exist in the external radio frequency port that is not externally connected with the antenna to the ground, so that great flexibility is brought to the design of the three-point RRU, and the application of the three-point RRU is enriched, so that the damage to the circuit board caused by the reflected standing wave when the external radio frequency port is empty is avoided, the load device that is originally required to be externally connected to the unused radio frequency port is also saved, and the indoor networking cost is reduced.

Fig. 2 shows a signal flow diagram of a built-in remote radio unit in the embodiment of the disclosure, as shown in fig. 2, for a scenario of only being an "active chamber end", taking 2×500mw@nr as an example, without considering interpolation loss of the first level control switch unit 201, where the signal flow is shown in fig. 2, the high-low level of the central control signal 0 is 0, and the high-low level of the central control signal 1 is 1; the two first level control switch units 201 respectively receive the radio frequency signal RF0 and the radio frequency signal RF1 through the input ports, and respectively control the output of the radio frequency signal RF0 and the output of the radio frequency signal RF1 based on the high level and the low level of the central control signal 0 and the central control signal 1, wherein the radio frequency signal RF0 is directly radiated from the first internal antenna 204, the radio frequency signal RF1 is radiated from the second internal antenna 205, and the power is 500mW; the 2 first level control switch units 201 are disconnected from the first power divider 202 and the second power divider 203 respectively; the 3 output ports of the first power divider 202 are connected to a first internal antenna 204, a first external rf port 206, and a third external rf port 208; the 3 output ports of the second power divider 203 are connected to a second internal antenna 205, a second external radio frequency port 207, and a fourth external radio frequency port 209; the second level control switch unit 206 connects the first external rf port 206, the third external rf port 208, the second external rf port 207, and the fourth external rf port 209 to ground.

Fig. 3 shows a signal schematic diagram of a remote radio unit with built-in and external connection in the embodiment of the disclosure, as shown in fig. 3, taking 2×500mw@nr as an example, two paths of radio signals RF0 and RF1 of 2×500mw@nr; the two first level control switch units 301 respectively receive the radio frequency signal RF0 and the radio frequency signal RF1 through the input ports, and control the output of the radio frequency signal RF0 and the output of the radio frequency signal RF1 based on the high level and the low level of the central control signal 0 and the central control signal 1 respectively, and the 2 first level control switch units 301 are disconnected from the first built-in antenna 304 and the second built-in antenna 305 respectively and are not communicated; the 2 first level control switch units 301 are respectively connected with the first power divider 302 and the second power divider 303; the 3 output ports of the first power divider 302 are connected to a first internal antenna 304, a first external radio frequency port 306, and a third external radio frequency port 308; the 3 output ports of the second power divider 303 are connected to a second internal antenna 305, a second external radio frequency port 307, and a fourth external radio frequency port 309; the first external radio frequency port 206 and the second external radio frequency port 207 are connected with a first external antenna 310; the third external radio frequency port 308 and the fourth external radio frequency port 309 are connected with the second external antenna 311; the second level control switch unit 306 receives the central control signal 0 and the central control signal 1.

The radio frequency signal RF0 is output through the first power divider 302 three ways, and the radio frequency signal RF1 is output through the second power divider 303 three ways, so as to become a 3×2×125mw@nr signal. If the conventional three-point RRU is used as the active chamber end, the radiation power of the first internal antenna and the second internal antenna is 125mW.

In the two embodiments, the improvement is based on the three-point RRU adopted in the active expansion type substation scheme, so that the method can be fully suitable for various scenes, wherein the three-point RRU is required to be used as a source of a traditional DAS antenna feed system to be fully utilized, and the method also comprises the scene that only the three-point RRU is required to be used as a built-in RRU to cover; the method can improve the utilization rate of network equipment, maximally utilize the functions of the equipment, adapt to diversified scenes and reduce the network coverage cost.

Fig. 4 shows a schematic diagram of grounding a feedback signal in an embodiment of the disclosure, as shown in fig. 4, for a remote radio unit serving as an "active chamber-division end" and a "passive chamber-division source" at the same time, taking 2×500mw@nr as an example, two paths of radio signals RF0 and RF1 of 2×500mw@nr; the two first level control switch units 401 respectively receive the radio frequency signal RF0 and the radio frequency signal RF1 through the input ports, and respectively control the output of the radio frequency signal RF0 and the output of the radio frequency signal RF1 based on the high level and the low level of the central control signal 0 and the central control signal 1, and the 2 first level control switch units 401 are respectively disconnected from the first built-in antenna 404 and the second built-in antenna 405 and are not communicated; the 2 first level control switch units 401 are respectively connected with the first power divider 402 and the second power divider 403; the 3 output ports of the first power divider 402 are connected to a first internal antenna 404, a first external rf port 406, and a third external rf port 408; the 3 output ports of the second power divider 403 are connected to the second internal antenna 405, the second external radio frequency port 407, and the fourth external radio frequency port 409; the first external radio frequency port 206 and the second external radio frequency port 207 are connected with a first external antenna 310; the third external rf port 408 and the fourth external rf port 409 are not externally connected with an antenna, and at this time, feedback signals of the third external rf port 408 and the fourth external rf port 409 need to be connected to a ground terminal through the second level control switch unit 406; the radio frequency signal RF0 is output through the first power divider 402, and the radio frequency signal RF1 is output through the second power divider 403, so as to become a 3×2×125mW@NR signal.

In the above embodiment, when the external antenna feeder is needed as the source, in order to prevent the external radio frequency port reflection signal which is not utilized in the three-point RRU from damaging the RRU, a load is typically additionally connected to the external radio frequency port which is not externally connected to consume the radio frequency signal energy, so that the hardware cost is additionally increased; the above embodiment introduces the second level control switching unit 406 avoiding the use of the above additional load while the influence of the reflected signal can be attenuated.

Based on the same inventive concept, an antenna switching method is also provided in the embodiments of the present disclosure, as follows. Because the principle of solving the problem in this embodiment of the method is similar to that of the embodiment of the remote radio unit, the implementation of this embodiment of the method can be referred to the implementation of the embodiment of the remote radio unit, and the repetition is not repeated.

Fig. 5 is a schematic diagram of an antenna switching method according to an embodiment of the disclosure, as shown in fig. 5, where the antenna switching method includes:

s502, a first level control switch unit receives a radio frequency signal and a central control signal, wherein the central control signal is a control signal sent by the central control unit;

s504, the first level control switch unit controls the radio frequency signal to be output to the internal antenna only or to the internal antenna and the external antenna according to the central control signal.

It should be noted that the method may be performed by any electronic device having computing processing capabilities.

In one embodiment, the center control signal is a high-low level signal.

In one embodiment, the central control unit is an ARM or an FPGA.

In one embodiment, the method further comprises:

the second level control switch unit short-circuits the feedback signal to the ground terminal.

In one embodiment, the second level control switch unit receives the control signal sent by the central control unit; the second level control switch unit is a multipath input multipath output unit, one end of the second level control switch unit is connected with the ground wire, and the other end of the second level control switch unit is connected with an external radio frequency port; the second level control switch unit receives a feedback signal sent by an external radio frequency port which is not externally connected with the antenna, and short-circuits the feedback signal to the grounding end.

In the embodiment, the first level control switch unit is added on the traditional three-point RRU, and the switching between the internal antenna and the external radio frequency port is controlled by using the central control signal, so that the equipment with the same model can be met, various requirement scenes can be covered, and the networking coverage cost is reduced; and the second level control switch unit is used for guiding the reflected signals of the external radio frequency port which is not connected with the antenna, so that the reflected signals are prevented from damaging devices.

Fig. 6 shows a schematic diagram of controlling to output a radio frequency signal according to a central control signal in an embodiment of the present disclosure, as shown in fig. 6, S504, the first level control switch unit controls to output the radio frequency signal to only the internal antenna or to the internal antenna and the external antenna according to the central control signal, including the following steps:

s602, the first level control switch unit controls the output of the radio frequency signal to the power divider according to the central control signal;

in one embodiment of the present disclosure, further comprising:

and acquiring a central control signal, and controlling the states of the built-in antenna, the power divider and the external radio frequency port according to the index table.

S604, the power divider distributes power to an internal antenna or an external radio frequency port;

s606, the external radio frequency port is connected with an external antenna.

In the embodiment, the three-point RRU can be adapted to more 5G indoor coverage scenes at present, so that the requirements of diversified scenes are met. From the cost perspective, one type of RRU can adapt to coverage scenes with various requirements, and the reconfigurability of the RRU reduces the network construction coverage cost.

Based on the same inventive concept, an antenna switching device is also provided in the embodiments of the present disclosure, as follows. Since the principle of solving the problem of the embodiment of the device is similar to that of the embodiment of the method, the implementation of the embodiment of the device can be referred to the implementation of the embodiment of the method, and the repetition is omitted.

Fig. 7 shows a schematic diagram of an antenna switching device according to an embodiment of the disclosure, and as shown in fig. 7, the antenna switching device 7 includes: a signal receiving module 701, a signal output module 702, a signal feedback module 703 and a signal grounding module 704;

the signal receiving module 701, the first level control switch unit receives a radio frequency signal and a central control signal, wherein the central control signal is a control signal sent by the central control unit;

the signal output module 702, the first level control switch unit controls to output the radio frequency signal to the internal antenna only or to the internal antenna and the external antenna according to the central control signal.

The signal feedback module 703, the second level control switch unit receives the feedback signal sent by the external radio frequency port not externally connected with the antenna;

the signal grounding module 704, the second level control switch unit shorts the feedback signal to the ground.

In the embodiment, the three-point RRU can be adapted to more indoor coverage scenes at present, so that the requirement of diversified scenes is met. From a cost perspective, multiple demand coverage scenarios can be accommodated, with reconfigurability reducing networking coverage costs. From the design point of view, only a certain number of level control switch units and feedback leads are added, and the circuit design and platemaking are little changed. From a resource point of view only a limited control signal of the central control unit is consumed. From the safety aspect, since the external radio frequency port is connected with the control unit through the feedback line, if the external radio frequency port is not connected with the external antenna, the radio frequency reflection signal is directly led to be grounded, and the device is not damaged.

Fig. 8 shows a schematic diagram of an active extended type small station three-stage architecture in the related art, and as shown in fig. 8, the active extended type small station three-stage architecture includes: a baseband processing unit 801, a plurality of switches 802, and a plurality of remote radio units 803; the baseband processing unit 801 is connected with the switch 802 through optical fibers; switch 802 is connected to remote radio units 803 by fiber or fiber optic cables.

Fig. 9 shows a schematic diagram of a three-point RRU in the related art; as shown in fig. 9, the three-point RRU includes: a power divider, an internal antenna and an external antenna; the embodiment of the disclosure does not limit the power divider, the internal antenna and the external radio frequency port, and takes two three-division power dividers and two internal antennas as examples for introduction. The three-point RRU comprises: a first power divider 901, a second power divider 902, a first internal antenna 903, a second internal antenna 904, a first external radio frequency port 905, a second external radio frequency port 906, a third external radio frequency port 907, a fourth external radio frequency port 908, a first external antenna 909, and a second external antenna 910; the first power divider 901 and the second power divider 902 receive radio frequency signals through input ports, and the first power divider 901 is configured to output the received radio frequency signals to the first internal antenna 903, the first external radio frequency port 905 and the third external radio frequency port 907 through the 3 output ports; the second power divider 902 is configured to output the received rf signal to the second internal antenna 904, the second external rf port 906, and the fourth external rf port 908 through the 3 output ports; the first external radio frequency port 905 and the third external radio frequency port 907 are connected with a first external antenna 909; the second external rf port 906 and the fourth external rf port 908 are connected to a second external antenna 910.

Those skilled in the art will appreciate that the various aspects of the present disclosure may be implemented as a system, method, or program product. Accordingly, various aspects of the disclosure may be embodied in the following forms, namely: an entirely hardware embodiment, an entirely software embodiment (including firmware, micro-code, etc.) or an embodiment combining hardware and software aspects may be referred to herein as a "circuit," module "or" system.

An electronic device 1000 according to such an embodiment of the present disclosure is described below with reference to fig. 10. The electronic device 1000 shown in fig. 10 is merely an example and should not be construed as limiting the functionality and scope of use of the disclosed embodiments.

As shown in fig. 10, the electronic device 1000 is embodied in the form of a general purpose computing device. Components of electronic device 1000 may include, but are not limited to: the at least one processing unit 1010, the at least one memory unit 1020, and a bus 1030 that connects the various system components, including the memory unit 1020 and the processing unit 1010.

Wherein the storage unit stores program code that is executable by the processing unit 1010 such that the processing unit 1010 performs steps according to various exemplary embodiments of the present disclosure described in the above section of the present specification. For example, the processing unit 1010 may perform the following steps of the method embodiment described above: the first level control switch unit receives radio frequency signals through an input port and controls the radio frequency signals to be output from a first output port or a second output port based on the high level and the low level of the central control signal; the power divider is used for outputting radio frequency signals received from an input port to the internal antenna and the external radio frequency port through the plurality of output ports.

The processing unit 1010 may perform the following steps of the method embodiment described above: the first level control switch unit receives a radio frequency signal and a central control signal, wherein the central control signal is a control signal sent by the central control unit; the first level control switch unit controls the radio frequency signal to be output to the internal antenna only or to the internal antenna and the external antenna according to the central control signal.

The processing unit 1010 may perform the following steps of the method embodiment described above: the second level control switch unit receives a feedback signal sent by an external radio frequency port which is not externally connected with an antenna; the second level control switch unit short-circuits the feedback signal to a ground terminal.

The processing unit 1010 may perform the following steps of the method embodiment described above: the first level control switch unit controls the radio frequency signal to be output to a power divider according to the central control signal; the power divider distributes power to an internal antenna or an external radio frequency port; the external radio frequency port is connected with the external antenna.

The processing unit 1010 may perform the following steps of the method embodiment described above: establishing an index table of the central control signal, the internal antenna, the power divider and the external radio frequency port; and acquiring the central control signal, and controlling the states of the internal antenna, the power divider and the external radio frequency port according to the index table.

The memory unit 1020 may include readable media in the form of volatile memory units such as Random Access Memory (RAM) 10201 and/or cache memory unit 10202, and may further include Read Only Memory (ROM) 10203.

The storage unit 1020 may also include a program/utility 10204 having a set (at least one) of program modules 10205, such program modules 10205 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of which may include an implementation of a network environment.

Bus 1030 may be representing one or more of several types of bus structures including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

The electronic device 1000 can also communicate with one or more external devices 1040 (e.g., keyboard, pointing device, bluetooth device, etc.), with one or more devices that enable a user to interact with the electronic device 1000, and/or with any device (e.g., router, modem, etc.) that enables the electronic device 1000 to communicate with one or more other computing devices. Such communication may occur through an input/output (I/O) interface 1050. Also, electronic device 1000 can communicate with one or more networks such as a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the Internet, through network adapter 1060. As shown, the network adapter 1060 communicates with other modules of the electronic device 1000 over the bus 1030. It should be appreciated that although not shown, other hardware and/or software modules may be used in connection with the electronic device 1000, including, but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, data backup storage systems, and the like.

From the above description of embodiments, those skilled in the art will readily appreciate that the example embodiments described herein may be implemented in software, or may be implemented in software in combination with the necessary hardware. Thus, the technical solution according to the embodiments of the present disclosure may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (may be a CD-ROM, a U-disk, a mobile hard disk, etc.) or on a network, including several instructions to cause a computing device (may be a personal computer, a server, a terminal device, or a network device, etc.) to perform the method according to the embodiments of the present disclosure.

In an exemplary embodiment of the present disclosure, a computer-readable storage medium, which may be a readable signal medium or a readable storage medium, is also provided. On which a program product is stored which enables the implementation of the method described above of the present disclosure. In some possible implementations, various aspects of the disclosure may also be implemented in the form of a program product comprising program code for causing a terminal device to carry out the steps according to the various exemplary embodiments of the disclosure as described in the "exemplary methods" section of this specification, when the program product is run on the terminal device.

More specific examples of the computer readable storage medium in the present disclosure may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

In this disclosure, a computer readable storage medium may include a data signal propagated in baseband or as part of a carrier wave, with readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A readable signal medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.

Alternatively, the program code embodied on a computer readable storage medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

In particular implementations, the program code for carrying out operations of the present disclosure may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device, partly on a remote computing device, or entirely on the remote computing device or server. In the case of remote computing devices, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., connected via the Internet using an Internet service provider).

It should be noted that although in the above detailed description several modules or units of a device for action execution are mentioned, such a division is not mandatory. Indeed, the features and functionality of two or more modules or units described above may be embodied in one module or unit in accordance with embodiments of the present disclosure. Conversely, the features and functions of one module or unit described above may be further divided into a plurality of modules or units to be embodied.

Furthermore, although the steps of the methods in the present disclosure are depicted in a particular order in the drawings, this does not require or imply that the steps must be performed in that particular order or that all illustrated steps be performed in order to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step to perform, and/or one step decomposed into multiple steps to perform, etc.

From the description of the above embodiments, those skilled in the art will readily appreciate that the example embodiments described herein may be implemented in software, or may be implemented in software in combination with the necessary hardware. Thus, the technical solution according to the embodiments of the present disclosure may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (may be a CD-ROM, a U-disk, a mobile hard disk, etc.) or on a network, including several instructions to cause a computing device (may be a personal computer, a server, a mobile terminal, or a network device, etc.) to perform the method according to the embodiments of the present disclosure.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any adaptations, uses, or adaptations of the disclosure following the general principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims

1. A remote radio unit comprising a first level control switch module, the first level control switch module comprising:

an external radio frequency port;

2. The remote radio unit of claim 1, wherein the power divider is a two-part power divider comprising 2 output ports respectively connected to the internal antenna and the external radio port;

Or (b)

3. The remote radio unit of claim 1, comprising 2 of said first level control switch modules.

4. A remote radio unit according to any one of claims 1 to 3, further comprising:

5. An antenna switching method, comprising:

6. The antenna switching method of claim 5, further comprising:

7. The antenna switching method according to claim 5, wherein the first level control switch unit controls the rf signal to be output to only the internal antenna or to the internal antenna and the external antenna according to the central control signal, including:

the external radio frequency port is connected with the external antenna.

8. The antenna switching method of claim 5, further comprising:

9. The antenna switching method of claim 6, further comprising: the second level control switch unit receives the control signal sent by the central control unit.

10. The antenna switching method according to any one of claims 5 to 9, wherein the pilot signal is a high-low level signal.

11. The antenna switching method according to any one of claims 5 to 9, wherein the central control unit is an ARM or FPGA.

12. An antenna switching apparatus, comprising:

13. The antenna switching apparatus of claim 12 further comprising:

14. An electronic device, comprising:

a processor; and

a memory for storing executable instructions of the processor;

Wherein the processor is configured to perform the antenna switching method of any of claims 5-11 via execution of the executable instructions.

15. A computer readable storage medium having stored thereon a computer program, which when executed by a processor implements the antenna switching method of any of claims 5 to 11.