Remote radio frequency unit and antenna switching methods, devices, media and electronic equipment

Abstract

This disclosure provides a remote radio frequency (RF) unit and an antenna switching method, apparatus, medium, and electronic device, relating to the field of communication technology. The remote RF unit includes a first-level control switch unit, a built-in antenna, an external RF port, and a power divider. The built-in antenna is connected to a first output port of the first-level control switch unit. The input port of the power divider is connected to a second output port of the first-level control switch unit, and multiple output ports of the power divider are respectively connected to the built-in antenna and the external RF port. The first-level control switch unit receives RF signals through its input port and controls the output of the RF signals from either the first or second output port based on the high or low level of a central control signal. The power divider outputs the RF signals received from the input port to the built-in antenna and the external RF port through multiple output ports. This embodiment avoids wasted power from the unloaded external RF port and damage to the circuit board from reflected signals.

Description

Technical Field

[0001] This disclosure relates to the field of communication technology, and in particular to a remote radio frequency unit and an antenna switching method, apparatus, medium and electronic equipment. Background Technology

[0002] In the 5G era, it is estimated that 80% of traffic will occur indoors, placing high demands on indoor coverage. Therefore, 5G indoor coverage is a critical and urgent issue that is of paramount importance. To provide high performance gain and a better mobile bandwidth user experience, current 5G indoor coverage primarily employs a three-tier architecture using active extended small cells, such as... Figure 8 As shown, it includes a baseband unit (BBU), a switch (HUB), and a radio remote unit (RRU).

[0003] Meanwhile, to fully utilize the existing 4G-era indoor passive distributed antenna system (DAS), integrate the advantages of active and passive solutions, ensure coverage effectiveness, and further reduce coverage costs, some RRU models are designed with an external antenna RF port as the signal source input for the DAS system. This type of RRU, which can both radiate wireless signals through its built-in antenna and simultaneously connect an external passive remote antenna, is known in the industry as a three-point RRU, such as... Figure 9 As shown. Generally speaking, a three-point RRU is designed and manufactured by embedding a power divider on the basis of an RRU that only contains an internal antenna. Since its hardware circuit board cannot be changed after the design is completed, RRUs with this design mode are only highly practical and advantageous when they need to be used as indoor signal sources for passive DAS systems and as terminals for active indoor DAS systems. For scenarios that only require coverage with an internal antenna and do not need to be used as signal source inputs for externally extended passive antennas, although a three-point RRU with an embedded power divider can also be adapted, the transmission signal power is proportionally reduced after the internal transmission link of the RRU passes through the power divider, and its coverage range is greatly reduced. The power of the RF port without an externally extended antenna is wasted. In addition, since the RF port is not connected to an external antenna, it is equivalent to an unloaded open circuit for the RRU. RF signals will be reflected back to the RRU circuit board. In severe cases, the voltage observed at the transmitter device may be twice the current voltage, which may cause circuit damage or even burn out the components.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] The present disclosure provides a remote radio unit and antenna switching method, device, medium and electronic equipment, which at least partially overcomes the problem of wasted power of a radio frequency port of a remote antenna without external connection and damage to devices caused by reflection of radio frequency signals in the related art.

[0006] Other characteristics and advantages of the present disclosure will become apparent from the following detailed description, or will be learned by practice of the present disclosure.

[0007] According to one aspect of the present disclosure, a remote radio unit is provided, comprising a first level control switch module, the first level control switch module comprising:

[0008] a first level control switch unit having an input port, a first output port and a second output port;

[0009] a built-in antenna connected to the first output port of the first level control switch unit;

[0010] an external radio frequency port;

[0011] a power divider, an input port of the power divider being connected to the second output port of the first level control switch unit, and a plurality of output ports of the power divider being respectively connected to the built-in antenna and the external radio frequency port;

[0012] wherein the first level control switch unit receives a radio frequency signal (RF) through the input port, and controls the radio frequency signal to be output from the first output port or the second output port based on the high or low level of a control signal;

[0013] the power divider is configured to output the radio frequency signal received from the input port to the built-in antenna and the external radio frequency port through the plurality of output ports.

[0014] In one embodiment of the present disclosure, the power divider is a two-way power divider, comprising two output ports connected to the built-in antenna and the external radio frequency port, respectively;

[0015] or

[0016] the power divider is a three-way power divider, comprising three output ports connected to the built-in antenna and two external radio frequency ports, respectively.

[0017] In one embodiment of the present disclosure, two first level control switch modules are included.

[0018] In one embodiment of the present disclosure, further comprising:

[0019] a second level control switch unit, the second level control switch unit being a multiple-input multiple-output unit, one end of which is connected to a ground wire, and the other end of which is connected to the external radio frequency port;

[0020] The second level control switch unit is configured to connect the external radio frequency port to the ground based on the control signal.

[0021] According to another aspect of the present disclosure, an antenna switching method is also provided, comprising:

[0022] The first level control switch unit receives a radio frequency signal and a control signal sent by the control unit.

[0023] 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 based on the control signal.

[0024] In one embodiment of the present disclosure, further comprising:

[0025] The second level control switch unit receives a feedback signal sent by the external radio frequency port without the external antenna.

[0026] The second level control switch unit shorts the feedback signal to the ground.

[0027] In one embodiment of the present disclosure, 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 based on the control signal, comprising:

[0028] The first level control switch unit controls the radio frequency signal to be output to the power divider based on the control signal.

[0029] The power divider distributes power to the internal antenna or the external radio frequency port.

[0030] The external radio frequency port is connected to the external antenna.

[0031] In one embodiment of the present disclosure, further comprising:

[0032] Establishing a control signal and an index table of the internal antenna, the power divider and the external radio frequency port.

[0033] Obtaining the control signal and controlling the states of the internal antenna, the power divider and the external radio frequency port based on the index table.

[0034] In one embodiment of the present disclosure, further comprising: the second level control switch unit receives a control signal sent by the control unit.

[0035] In one embodiment of the present disclosure, the control signal is a high-low level signal.

[0036] In one embodiment of the present disclosure, the control unit is an ARM or an FPGA.

[0037] According to another aspect of the present disclosure, an antenna switching device is also provided, comprising:

[0038] a signal receiving module, the first level control switch unit receives a radio frequency signal and a control signal, wherein the control signal is a control signal sent by a control unit;

[0039] a signal output module, the first level control switch unit controls the radio frequency signal to be output only to the built-in antenna or to the built-in antenna and the external antenna according to the control signal.

[0040] In an embodiment of the present disclosure, further comprising:

[0041] a signal feedback module, the second level control switch unit receives a feedback signal sent by an external radio frequency port without an external antenna;

[0042] a signal grounding module, the second level control switch unit shorts the feedback signal to a ground terminal.

[0043] According to another aspect of the present disclosure, an electronic device is also provided, comprising: a processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to execute the antenna switching method described above via execution of the executable instructions.

[0044] According to another aspect of the present disclosure, a computer readable storage medium having a computer program stored thereon is also provided, the computer program is executed by a processor to implement the antenna switching method described above.

[0045] The remote radio frequency unit and the antenna switching method, device, medium and electronic device provided by the embodiments of the present disclosure relate to the field of communication technology. The remote radio frequency unit comprises a first level control switch unit, a built-in 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. An input port of the power divider is connected with a 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 built-in antenna and the external radio frequency port. The first level control switch unit receives a radio frequency signal through an input port of the first level control switch unit, and controls the radio frequency signal to be output from the first output port or the second output port based on a high or low level of a control signal. The power divider outputs the radio frequency signal received from the input port to the built-in antenna and the external radio frequency port through the plurality of output ports. The embodiments of the present disclosure can avoid wasting the power of the idle external radio frequency port and the damage of the circuit board by the reflected signal.

[0046] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0047] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments consistent with the present disclosure and, together with the description, further serve to explain the principles of the present disclosure. It is to be understood that the drawings are designed solely for purposes of illustration to be used in conjunction with the description. It is to be understood that the drawings are designed solely for purposes of illustration and are not intended to limit the scope of the disclosure in any way.

[0048] Figure 1 Fig. 1 shows a schematic diagram of a remote radio unit according to an embodiment of the present disclosure;

[0049] Figure 2 Fig. 2 shows a schematic diagram of a signal flow of a built-in remote radio unit according to an embodiment of the present disclosure;

[0050] Figure 3 Fig. 3 shows a schematic diagram of a signal flow of a built-in remote radio unit according to an embodiment of the present disclosure;

[0051] Figure 4 Fig. 4 shows a schematic diagram of a feedback signal grounding according to an embodiment of the present disclosure;

[0052] Figure 5 Fig. 5 shows a schematic diagram of an antenna switching method according to an embodiment of the present disclosure;

[0053] Figure 6 Fig. 6 shows a schematic diagram of controlling outputting of a radio frequency signal according to a control signal according to an embodiment of the present disclosure;

[0054] Figure 7 Fig. 7 shows a schematic diagram of an antenna switching device according to an embodiment of the present disclosure;

[0055] Figure 8 Fig. 8 shows a schematic diagram of a three-level architecture of an active extended small cell according to the related art;

[0056] Figure 9 Fig. 9 shows a schematic diagram of a three-point RRU according to the related art; and

[0057] Figure 10 Fig. 10 shows a structural block diagram of an electronic device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0058] Example implementations will now be described with reference to the drawings; however, these implementations are merely examples and are not intended to limit the scope of the present disclosure. Rather, these implementations are intended to explain the principles of the present disclosure to persons skilled in the art. The features, structures or characteristics described in the description, as well as in the claims, are implemented in combinations suitable to the individual implementations. The same reference numerals are generally used to refer to the same elements throughout.

[0059] In addition, the accompanying drawings are only schematic and are non-limiting, each identical, or similar components that are illustrated in any of the Figures are thus meant to be interpreted as identical or similar components, not necessarily according to their assigned reference numbers. The drawings are intended to aid in understanding the disclosure. The drawings show some schematic block diagrams, which are functional entities not necessarily having to correspond to physically or logically independent entities. These functional entities can be implemented in software, or in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0060] For the convenience of understanding, the following first explains several terms involved in the present disclosure as follows:

[0061] RRU (Radio Remote Unit, Remote Radio Unit) is a transceiver module that converts intermediate frequency signals to radio frequency signals; and then, through a power amplifier and a filter module, the radio frequency signals are transmitted through an antenna port.

[0062] BBU (Baseband Unit, Indoor Baseband Processing Unit) is a distributed base station architecture widely used in 3G networks, and an optical fiber connection is needed between the RRU and the BBU; one BBU can support multiple RRUs; and the BBU+RRU multi-channel solution can well solve the indoor coverage of large venues.

[0063] The present example embodiment will be described in detail below in conjunction with the accompanying drawings and examples.

[0064] Figure 1 A schematic diagram of a remote radio unit in an embodiment of the present disclosure is shown, as shown in the figure, the remote radio unit provided in the embodiment of the present disclosure includes: a first level control switch module, a built-in antenna, an external radio frequency port, and a power divider; Figure 1

[0065] 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;

[0066] The built-in antenna is connected to the first output port of the first level control switch unit 101;

[0067] The power divider has its input port connected to 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 to the built-in antenna and the external radio frequency port;

[0068] The first level control switch unit 101 receives a radio frequency signal (RF) through the input port and controls the radio frequency signal to be output from the first output port or the second output port based on the high or low level of the control signal; and the power divider is used to output the radio frequency signal received from the input port to the built-in antenna and the external radio frequency port through the plurality of output ports.​

[0069] In an embodiment, the power divider can be a two-way power divider or a three-way power divider, without limitation.

[0070] In an embodiment, the power divider is a two-way power divider, including two output ports connected to the built-in antenna and the external radio frequency port, respectively.

[0071] In another embodiment, the power divider is a three-way power divider, including three output ports connected to the built-in antenna and two external radio frequency ports, respectively.

[0072] In an embodiment, a plurality of first level control switch modules can be included, without limitation.

[0073] In the above embodiments, diversified scene requirements can be met; from the cost perspective, a variety of demand coverage scenarios can be adapted, and the reconfigurability reduces the network coverage cost; from the design perspective, only a certain number of level control switch units and feedback leads are added, and the circuit design and plate making are less changed; from the resource perspective, only limited control signals of the central control unit are consumed; from the safety perspective, since the external radio frequency port is connected to the control unit through the feedback line, if the external radio frequency port is not connected to the antenna, the radio frequency reflection signal is directly guided to the ground, and the device will not be damaged.

[0074] In an embodiment, two first level control switch modules and a three-way power divider are taken as an example for introduction. The remote radio unit includes:

[0075] Two first level control switch modules; the two first level control switch modules include: two 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;

[0076] A first built-in antenna 104 and a second built-in antenna 105; the first built-in antenna 104 is connected to the 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;

[0077] A first power divider 102 and a second power divider 103; the input port of the first power divider 102 is connected to the second output port of the first level control switch unit 101, and the three output ports of the first power divider 102 are respectively connected to the first built-in 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 to the second output port of the first level control switch unit 101, and the three output ports of the second power divider 103 are respectively connected to the second built-in antenna 105, the second external radio frequency port 107, and the fourth external radio frequency port 109;

[0078] The first level control switch unit 101 receives the radio frequency signal RF0 received 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 or low level of the control signal 0; the first power divider 102 is used for outputting the radio frequency signal RF0 received from the input port to the first built-in antenna 104 and the first external radio frequency port 106, the third external radio frequency port 108 through three output ports.

[0079] The first level control switch unit 101 receives the radio frequency signal RF1 received 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 or low level of the control signal 1; the second power divider 103 is used for outputting the radio frequency signal RF1 received from the input port to the second built-in antenna 105 and the second external radio frequency port 107, the fourth external radio frequency port 109 through three output ports.

[0080] In one embodiment, through the first level control switch module, the three-point position can be reconfigured into two functional modes. The first is only built-in type, as "active room end", in this mode, the 2-way control signal makes the output power signal of the first level control switch unit 101 directly output 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 the weak loss value of the first level control switch unit 101 is offset.

[0081] The second is that the built-in type and the external type work at the same time, as "active room end" and "passive room signal source", in this mode, the 2-way control signal controls the radio frequency signal RF0 and the radio frequency signal RF1 to be output to the power divider, and the power divider is then distributed to the built-in antenna and the external radio frequency port with equal power.

[0082] In one embodiment, the 2-way control signal simultaneously controls two groups of first level control switch units 101, so that the high and low level signal control can be reasonably designed. Table 1 gives an embodiment. The four RF ports can be divided into two groups of RF groups. The first RF group is the first external RF port 106 and the second external RF port 107, and the second RF group is the third external RF port 108 and the fourth external RF port 109. As shown in Table 1, when the three-point RRU is only used as an "active room branch terminal", index 0 control sequence is used; when the three-point RRU has both "active room branch terminal" and "passive room branch source", and all external RF ports are externally connected to the antenna, index 1 control sequence can be used; when the three-point RRU has both "active room branch terminal" and "passive room branch source", but the first RF group is not externally connected to the antenna, index 2 control sequence can be used; when the three-point RRU has both "active room branch terminal" and "passive room branch source", but the second RF group is not externally connected to the antenna, index 3 control sequence can be used. Table 1 gives a control table of the control signal. Among them, "√" represents the signal input end, and "×" represents the signal blocking.

[0083] Table 1 Control table of control signal

[0084]

[0085] In the above embodiment, by introducing the first level control switch module in the circuit design, the switching of the built-in antenna and the externally connected antenna is controlled by the high and low level signals through the control unit, such as ARM or FPGA. When the externally connected passive remote antenna is needed, the three-point RRU function mode is presented; when the externally connected passive remote antenna is not needed, the built-in antenna only working mode is switched, and the RRU transmitter power is radiated through the built-in antenna; the remote radio unit can quickly adjust its configuration to respond to task requirements, so that it can adapt to more indoor wireless coverage scenarios, that is, it can better adapt to the "active room branch terminal" scenario and the "active room branch terminal" and "passive room branch source" scenario.

[0086] In one embodiment, a remote radio unit includes a second level control switch unit 106, which is a multiple-input multiple-output unit, one end of which is connected to the ground wire and the other end of which is connected to the external RF port; the second level control switch unit 106 is used to connect the external RF port to the ground wire based on the control signal.

[0087] In one embodiment, the remote radio unit includes one or more second level control switch units 106. The embodiment of the present disclosure takes one second level control switch unit 106 as an example for introduction.

[0088] In one embodiment, the second level control switch unit 106 is a multiple-input and multiple-output unit, and is controlled by two control signals: center control signal 0 and center control signal 1 to control which input signals are output from the output port.

[0089] In the above embodiment, the second level control switch unit 106 is used to directly short the feedback signal that may exist in the external radio frequency port without an external antenna to the ground, which brings great flexibility to the design of the three-point RRU and enriches the use of the three-point RRU. This avoids damage to the circuit board caused by the reflected standing wave when the external radio frequency port is idle, and also saves the load device that needs to be externally connected to the unused radio frequency port, thereby reducing the cost of indoor network construction.

[0090] Figure 2 A signal flow diagram of a built-in remote radio unit in an embodiment of the present disclosure is shown in FIG. 1. Figure 2 As shown in FIG. 2, for a scenario of only being an "active room end terminal", taking 2x500mW@NR as an example, without considering the interpolation loss of the first level control switch unit 201, the signal flow is shown in FIG. 3. Figure 2 As shown in FIG. 3, the high and low levels of the center control signal 0 are 0, and the high and low levels of the center control signal 1 are 1; the two first level control switch units 201 respectively receive the radio frequency signals RF0 and RF1 through the input ports, and control the output of the radio frequency signals RF0 and RF1 based on the high and low levels of the center control signal 0 and the center control signal 1, respectively. The radio frequency signal RF0 is directly radiated from the first built-in antenna 204, and the radio frequency signal RF1 is radiated from the second built-in antenna 205, both with a power of 500mW; the two first level control switch units 201 are respectively disconnected from the first power divider 202 and the second power divider 203; the three output ports of the first power divider 202 are connected to the first built-in antenna 204, the first external radio frequency port 206, and the third external radio frequency port 208; the three output ports of the second power divider 203 are connected to the second built-in antenna 205, the second external radio frequency port 207, and the fourth external radio frequency port 209; and the second level control switch unit 206 grounds the first external radio frequency port 206, the third external radio frequency port 208, the second external radio frequency port 207, and the fourth external radio frequency port 209.

[0091] Figure 3 A signal flow diagram of a built-in remote radio unit in an embodiment of the present disclosure is shown in FIG. 1. Figure 3As shown, taking 2x500mW@NR as an example, two radio frequency signals RF0 and RF1 of 2x500mW@NR; two first level control switch units 301 respectively receive radio frequency signals RF0 and RF1 received through input ports, and control the output of radio frequency signals RF0 and RF1 based on the high and low levels of control signals 0 and 1, respectively. Two first level control switch units 301 are disconnected from the first built-in antenna 304 and the second built-in antenna 305; two first level control switch units 301 are connected to the first power divider 302 and the second power divider 303; three output ports of the first power divider 302 are connected to the first built-in antenna 304, the first external radio frequency port 306 and the third external radio frequency port 308; three output ports of the second power divider 303 are connected to the second built-in antenna 305, the second external radio frequency port 307 and the fourth external radio frequency port 309; the first external radio frequency port 206 and the second external radio frequency port 207 are connected to the first external antenna 310; the third external radio frequency port 308 and the fourth external radio frequency port 309 are connected to the second external antenna 311; the second level control switch unit 306 receives control signals 0 and 1.

[0092] The radio frequency signal RF0 is output through the first power divider 302, and the radio frequency signal RF1 is output through the second power divider 303, becoming 3x2x125mW@NR signals. If a traditional three-point RRU is used only as an active room end, the first built-in antenna and the second built-in antenna have a radiation power of 125mW.

[0093] In the above two embodiments, based on the three-point RRU commonly used in the active expansion type small station scheme, it can be fully applied to various scenes, including the need for the three-point RRU as a signal source of a traditional DAS antenna system to fully utilize the old, and also including the scene of only needing the three-point RRU as an internal RRU coverage; it can improve the utilization rate of network equipment, maximize the use of equipment functions, adapt to diversified scenes, and reduce network coverage costs.

[0094] Figure 4 A feedback signal grounding schematic diagram in the embodiment of the present disclosure is shown as Figure 4As shown, for the remote radio unit simultaneously as "active room sub-terminal" and "passive room sub-source", taking 2x500mW@NR as an example, two-way radio frequency signals RF0 and RF1 of 2x500mW@NR; two first level control switch units 401 respectively receive radio frequency signals RF0 and RF1 received through the input port, and control the output of radio frequency signals RF0 and RF1 based on the high and low levels of control signals 0 and 1, respectively. Two first level control switch units 401 are disconnected from the first built-in antenna 404 and the second built-in antenna 405; two first level control switch units 401 are connected with the first power divider 402 and the second power divider 403; the three output ports of the first power divider 402 are connected to the first built-in antenna 404, the first external radio frequency port 406 and the third external radio frequency port 408; the three output ports of the second power divider 403 are connected to the second built-in 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 the first external antenna 310; the third external radio frequency port 408 and the fourth external radio frequency port 409 are not connected with the antenna, at this time, the feedback signals of the third external radio frequency port 408 and the fourth external radio frequency port 409 need to be connected to the ground through the second level control switch unit 406; radio frequency signals RF0 are three-way output through the first power divider 402, and radio frequency signals RF1 are three-way output through the second power divider 403, becoming 3x2x125mW@NR signals.

[0095] In the above embodiment, when it is necessary to be connected as a signal source external antenna, in order to prevent the unused external radio frequency port of the three-point RRU from causing damage to the RRU, a load is generally connected to the unused external radio frequency port to consume radio frequency signal energy, which in turn increases the hardware cost; the second level control switch unit 406 is introduced in the above embodiment to avoid using the above-mentioned additional load, while the influence of the reflected signal can be weakened.

[0096] Based on the same inventive concept, the disclosure embodiment also provides an antenna switching method, as follows. Since the principle of the method embodiment solves the problem similar to the above-mentioned remote radio unit embodiment, the implementation of the method embodiment can be referred to the implementation of the above-mentioned remote radio unit embodiment, and the repeated parts will not be described here.

[0097] Figure 5 An antenna switching method in the embodiment of the disclosure is shown in the schematic diagram, as shown in the figure, Figure 5 The antenna switching method comprises:

[0098] S502, the first level control switch unit receives the radio frequency signal and the control signal, wherein the control signal is the control signal sent by the control unit;

[0099] S504, the first level control switch unit controls the radio frequency signal to be output only to the built-in antenna or to the built-in antenna and the external antenna according to the control signal.

[0100] It should be noted that the method can be executed by any electronic device with computing processing capability.

[0101] In one embodiment, the control signal is a high-low level signal.

[0102] In one embodiment, the control unit is ARM or FPGA.

[0103] In one embodiment, the method further comprises:

[0104] The second level control switch unit receives the feedback signal sent by the external radio frequency port without external antenna;

[0105] The second level control switch unit short-circuits the feedback signal to the ground terminal.

[0106] In one embodiment, the second level control switch unit receives the control signal sent by the control unit; the second level control switch unit is a multiple-input multiple-output unit, one end of which is connected with the ground wire and the other end of which is connected with the external radio frequency port; the second level control switch unit receives the feedback signal sent by the external radio frequency port without external antenna and short-circuits the feedback signal to the ground terminal.

[0107] In the above embodiment, by adding the first level control switch unit to the traditional three-point RRU, the switching between the built-in antenna and the external radio frequency port is controlled using the control signal, so as to meet the demand of covering multiple scenarios with the same type of device and reduce the network coverage cost; through the second level control switch unit, the reflection signal of the external radio frequency port without antenna is guided to prevent the reflection signal from damaging the device.

[0108] Figure 6 A schematic diagram of controlling the output of the radio frequency signal according to the control signal in the embodiment of the present disclosure is shown as follows. Figure 6 As shown in S504, the first level control switch unit controls the radio frequency signal to be output only to the built-in antenna or to the built-in antenna and the external antenna according to the control signal, which comprises the following steps:

[0109] S602, the first level control switch unit controls the radio frequency signal to be output to the power divider according to the control signal.

[0110] In one embodiment of the present disclosure, the method further comprises:

[0111] Establishing an index table of the control signal, the built-in antenna, the power divider and the external radio frequency port;

[0112] The control signal is acquired, and the states of the built-in antenna, the power divider and the external radio frequency port are controlled according to the index table.

[0113] In S604, the power divider allocates power to the built-in antenna or the external radio frequency port.

[0114] In S606, the external radio frequency port is connected to the external antenna.

[0115] In the above embodiment, the current three-point RRU can adapt to more 5G indoor coverage scenarios, and meet the diversified scene requirements. From the cost point of view, one model of RRU can adapt to various demand coverage scenarios, and the reconfigurability reduces the network coverage cost.

[0116] Based on the same inventive concept, the present embodiment also provides an antenna switching device, as follows. Since the principle of solving the problem of the device embodiment is similar to that of the above-mentioned method embodiment, the implementation of the device embodiment can be referred to the implementation of the above-mentioned method embodiment, and the repeated parts will not be described here.

[0117] Figure 7 A schematic diagram of an antenna switching device in the embodiment of the present disclosure is shown, as shown in the figure, 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. Figure 7

[0118] The signal receiving module 701 receives the radio frequency signal and the control signal of the first level control switch unit, wherein the control signal is the control signal sent by the control unit.

[0119] The signal output module 702 controls the radio frequency signal to be output only to the built-in antenna or to the built-in antenna and the external antenna according to the control signal.

[0120] The signal feedback module 703 receives the feedback signal sent by the external radio frequency port without external antenna by the second level control switch unit.

[0121] The signal grounding module 704 shorts the feedback signal to the ground end by the second level control switch unit.

[0122] ​The above embodiments enable the current three-point RRU to adapt to more indoor coverage scenarios, meeting diverse scenario requirements. From a cost perspective, it can adapt to coverage scenarios with various needs, and its reconfigurability reduces network construction costs. From a design perspective, it only requires adding a certain number of level control switch units and feedback leads, with minimal changes to circuit design and board fabrication. From a resource perspective, it only consumes the limited control signals of the central control unit. From a safety perspective, since the external RF port is connected to the control unit through the feedback line, if the external RF port is not connected to an external antenna, its RF reflection signal is directly guided to ground, without damaging the device.

[0123] Figure 8 This diagram illustrates a three-tier architecture for an active, scalable small station in related technologies, such as... Figure 8 As shown, the three-level architecture of the active extended small cell includes: a baseband processing unit 801, multiple switches 802, and multiple remote radio units 803; the baseband processing unit 801 and the switches 802 are connected by optical fiber; the switches 802 and the remote radio units 803 are connected by optical fiber or optical cable.

[0124] Figure 9 This diagram illustrates a three-point RRU in the related art; such as Figure 9 As shown, the three-point RRU includes: a power divider, an internal antenna, and an external antenna. This embodiment does not limit the power divider, internal antenna, or external RF port; it is described using two three-way power dividers and two internal antennas as an example. The three-point RRU includes: a first power divider 901, a second power divider 902, a first internal antenna 903, a second internal antenna 904, a first external RF port 905, a second external RF port 906, a third external RF port 907, a fourth external RF 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 RF signals through their input ports. The first power divider 901 is used to output the received RF signals through the three output ports. The first external RF port 905 and the third external RF port 907 are output to the first built-in antenna 903; the second power divider 902 is used to output the received RF signal through the three output ports to the second built-in antenna 904, the second external RF port 906 and the fourth external RF port 908; the first external RF port 905 and the third external RF port 907 are connected to the first external antenna 909; the second external RF port 906 and the fourth external RF port 908 are connected to the second external antenna 910.

[0125] Those skilled in the art can understand that the various aspects of the present disclosure can be implemented as a system, a method or a program product. Therefore, the various aspects of the present disclosure can be embodied as a whole hardware implementation, a whole software implementation (including firmware, microcode, etc.), or an implementation combined with hardware and software aspects, which can be collectively referred to as "circuitry", "module" or "system" here.

[0126] The electronic device 1000 according to this embodiment of the present disclosure will be described below with reference to Figure 10 Figure 10 The electronic device 1000 shown is merely an example and should not limit the functions and usage range of the embodiments of the present disclosure.

[0127] As Figure 10 shown, the electronic device 1000 is in the form of a general computing device. The components of the electronic device 1000 can include, but are not limited to, the at least one processing unit 1010 described above, the at least one storage unit 1020 described above, and a bus 1030 connecting different system components, including the storage unit 1020 and the processing unit 1010.

[0128] The storage unit stores program code that can be executed by the processing unit 1010, so that the processing unit 1010 performs the steps according to various exemplary embodiments of the present disclosure described in the "Exemplary Method" section of the present specification. For example, the processing unit 1010 can perform the following steps of the above method embodiments: the first level control switch unit receives a radio frequency signal 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 or low level of a control signal; and the power divider is used to output the radio frequency signal received from the input port to the built-in antenna and the external radio frequency port through the multiple output ports.

[0129] The processing unit 1010 can perform the following steps of the above method embodiments: the first level control switch unit receives a radio frequency signal and a control signal, wherein the control signal is a control signal sent by the control unit; and the first level control switch unit controls the radio frequency signal to be output only to the built-in antenna, or to be output to the built-in antenna and the external antenna according to the control signal.

[0130] The processing unit 1010 can perform the following steps of the above method embodiments: the second level control switch unit receives a feedback signal sent by the external radio frequency port without an external antenna; and the second level control switch unit shorts the feedback signal to a ground terminal.

[0131] ​The processing unit 1010 can perform the following steps of the above method embodiments: the first level control switch unit controls the output of the radio frequency signal to the power divider according to the central control signal; the power divider allocates power to the built-in antenna or the external radio frequency port; and the external radio frequency port is connected to the external antenna.

[0132] The processing unit 1010 can perform the following steps of the above method embodiments: establishing a central control signal and an index table of the built-in antenna, the power divider and the external radio frequency port; obtaining the central control signal and controlling the state of the built-in antenna, the power divider and the external radio frequency port according to the index table.

[0133] The storage unit 1020 can include a readable medium in the form of a volatile storage unit, such as a random access memory (RAM) 10201 and / or a cache memory unit 10202, and can further include a read-only memory (ROM) 10203.

[0134] The storage unit 1020 can also include a program / utility 10204 having a set (at least one) of program modules 10205, such as an operating system, one or more application programs, other program modules, and program data, which can include the implementation of a network environment, each or a combination of these examples.

[0135] The bus 1030 can represent one or more of several types of bus structures, including a storage unit bus or bus controller, a peripheral bus, a graphics acceleration port, a processing unit, or a local bus using any of a variety of bus architectures.

[0136] The electronic device 1000 can also communicate with one or more external devices 1040, such as a keyboard or pointing device, a Bluetooth device, etc.; and can also communicate with one or more devices that enable a user to interact with the electronic device 1000, and / or any devices (e.g., a router, a modem, etc.) that enable the electronic device 1000 to communicate with one or more other computing devices. Such communication can occur via an input / output (I / O) interface 1050. Still yet, the electronic device 1000 can communicate with one or more networks, such as a local area network (LAN), a wide area network (WAN), and / or the public network, such as the Internet, via a network adapter 1060. As depicted, the network adapter 1060 communicates with the other components of the electronic device 1000 via the bus 1030. It should be appreciated that although the network adapter 1060 is depicted as a single component, the network adapter 1060 can comprise two or more components that work together to facilitate communications with one or more other computing devices.

[0137] Through the description of the above embodiments, those skilled in the art can easily understand that the example embodiments described herein can be implemented by software, or by software in combination with necessary hardware. Therefore, the technical solutions according to the embodiments of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash disk, a mobile hard disk, etc.) or a network, and includes a number of instructions to make a computing device (which can be a personal computer, a server, a terminal device, or a network device, etc.) execute the methods according to the embodiments of the present disclosure.

[0138] In the example embodiments of the present disclosure, a computer readable storage medium is also provided, which can be a readable signal medium or a readable storage medium. A program product capable of implementing the above method of the present disclosure is stored on the computer readable storage medium. In some possible embodiments, various aspects of the present disclosure can also be implemented in the form of a program product, which includes program codes for causing the terminal device to execute the steps according to various example embodiments of the present disclosure described in the above "example method" section of the specification when the program product runs on the terminal device.

[0139] More specific examples of the computer readable storage medium in the present disclosure can 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 above.

[0140] In the present disclosure, the computer readable storage medium can include a data signal propagating in a baseband or as a carrier wave in a propagated data signal, in which a readable program code is borne. Such a propagated data signal can take various forms, including but not limited to an electromagnetic signal, an optical signal, or any suitable combination of the above. The readable signal medium can also be any readable medium other than the readable storage medium, which can send, propagate or transmit programs for use by or in connection with an instruction execution system, apparatus or device.

[0141] Optionally, the program code contained on the computer readable storage medium can be transmitted by any suitable medium, including but not limited to wireless, wired, optical cable, RF, etc., or any suitable combination of the above.

[0142] In particular embodiments, the program code utilized by the program code instructions can 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 can execute entirely on the user's computing device, partly on the user's computing device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device or entirely on the remote computing device or server. In the latter scenario, the remote computing device can be connected to the user's computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection can be made to an external computing device, such as through the Internet using an Internet Service Provider. The application programming interface (API) server can be used to facilitate the communication between the client and the server.

[0143] It should be noted that, although several modules or units of the devices for action execution are mentioned in the foregoing detailed description, such division is not mandatory. Indeed, features and functionalities of two or more modules or units described above can be embodied in one module or unit according to embodiments of the present disclosure. Conversely, features and functionalities of one module or unit described above can be further divided into multiple modules or units.

[0144] Furthermore, although the various steps of the methods in the present disclosure are described 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 of the steps must be performed to achieve the desired result. Additionally or alternatively, certain steps can be omitted, multiple steps can be combined into one step, one step can be split into multiple steps, etc.

[0145] From the above description of the embodiments, it is easy for those skilled in the art to understand that the example embodiments described herein can be implemented by software, or by a combination of software and necessary hardware. Therefore, the technical solutions according to the embodiments of the present disclosure can be embodied in the form of a software product. The software product can be stored in a non-volatile storage medium, such as a CD-ROM, a USB flash disk, a mobile hard disk, or the like, or on a network, and includes a plurality of instructions to make a computing device (which can be a personal computer, a server, a mobile terminal, or a network device, etc.) execute the methods according to the embodiments of the present disclosure.

[0146] Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the features disclosed herein. It is intended that the disclosure be construed as including any patents, patent applications, publications, publications, or other disclosure of complementary subject matter that is within the scope of the disclosure. It is intended that the specification and examples be considered exemplary only, with the true scope and spirit of the disclosure being indicated by the following claims.

Claims

1. A remote radio unit, characterized by, The first level control switch module comprises: The first level control switch unit has an input port, a first output port and a second output port; The built-in antenna is connected with the first output port of the first level control switch unit; The 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 the multiple output ports of the power divider are respectively connected with the built-in antenna and the external radio frequency port; The first level control switch unit receives the radio frequency signal (RF) through the input port, and controls the radio frequency signal to be output from the first output port or the second output port based on the high or low level of the control signal; The power divider is used for outputting the radio frequency signal received from the input port to the built-in antenna and the external radio frequency port through the multiple output ports.

2. The remote radio unit of claim 1, wherein, The power divider is a two-way power divider, comprising two output ports connected with the built-in antenna and the external radio frequency port respectively; Or The power divider is a three-way power divider, comprising three output ports connected with the built-in antenna and two external radio frequency ports respectively.

3. The remote radio unit of claim 1, wherein, Two first level control switch modules are included.

4. The remote radio unit of any one of claims 1 to 3, wherein, Further comprising: The second level control switch unit is a multiple-input and multiple-output unit, one end of which is connected with the ground wire, and the other end 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 control signal.

5. An antenna switching method, characterized by, Comprise: The first level control switch unit receives the radio frequency signal and the control signal, wherein the control signal is a control signal sent by a control unit; The first level control switch unit controls the radio frequency signal to be output only to the built-in antenna or to the built-in antenna and the external antenna according to the control signal; The first level control switch unit controls the radio frequency signal to be output only to the built-in antenna or to the built-in antenna and the external antenna according to the control signal, comprising: The first level control switch unit controls the radio frequency signal to be output to the power divider according to the control signal; The power divider divides the power to the built-in antenna or the external radio frequency port; The external radio frequency port is connected with the external antenna.

6. The antenna switching method of claim 5, wherein, Further comprising: The second level control switch unit receives the feedback signal sent by the external radio frequency port without external antenna; The second level control switch unit shorts the feedback signal to the ground end.

7. The antenna switching method of claim 5, wherein, Further comprising: Establishing a control signal and an index table of the built-in antenna, the power divider and the external radio frequency port; Obtaining the 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.

8. The antenna switching method of claim 6, wherein, Further comprising: The second level control switch unit receives the control signal sent by the control unit.

9. The antenna switching method according to any one of claims 5 to 8, characterized by, The control signal is a high or low level signal.

10. The antenna switching method of any one of claims 5 to 8, wherein, The control unit is an ARM or an FPGA.

11. An antenna switching device, characterized by Comprise: The signal receiving module, the first level control switch unit receives the radio frequency signal and the control signal, wherein the control signal is a control signal sent by a control unit; The signal output module is configured to control the first level control switch unit to output the radio frequency signal to the power divider according to the central control signal. The signal output module is configured to control the first level control switch unit to output the radio frequency signal to the power divider according to the central control signal. The power divider is configured to distribute power to the built-in antenna or the external radio frequency port. The external radio frequency port is connected to the external antenna.

12. The antenna switching apparatus of claim 11, wherein, Further comprising: The signal feedback module is configured to receive a feedback signal sent by the external radio frequency port without the external antenna. The signal grounding module is configured to short the feedback signal to a grounding end by the second level control switch unit.

13. An electronic device, comprising: The signal feedback module is configured to receive a feedback signal sent by the external radio frequency port without the external antenna. The signal grounding module is configured to short the feedback signal to a grounding end by the second level control switch unit. The signal feedback module is configured to receive a feedback signal sent by the external radio frequency port without the external antenna. The signal grounding module is configured to short the feedback signal to a grounding end by the second level control switch unit. The signal feedback module is configured to receive a feedback signal sent by the external radio frequency port without the external antenna.

14. A computer readable storage medium having stored thereon a computer program, characterized in that, The signal grounding module is configured to short the feedback signal to a grounding end by the second level control switch unit. The signal feedback module is configured to receive a feedback signal sent by the external radio frequency port without the external antenna. The signal grounding module is configured to short the feedback signal to a grounding end by the second level control switch unit. The signal feedback module is configured to receive a feedback signal sent by the external radio frequency port without the external antenna. The signal grounding module is configured to short the feedback signal to a grounding end by the second level control switch unit. The signal feedback module is configured to receive a feedback signal sent by the external radio frequency port without the external antenna. The signal grounding module is configured to short the feedback signal to a grounding end by the second level control switch unit. The signal feedback module is configured to receive a feedback signal sent by the external radio frequency port without the external antenna. The signal grounding module is configured to short the feedback signal to a grounding end by the second level control switch unit. The signal feedback module is configured to receive a feedback signal sent by the external radio frequency port without the external antenna. The signal grounding module is configured to short the feedback signal to a grounding end by the second level control switch unit. The signal feedback module is configured to receive a feedback signal sent by the external radio frequency port without the external antenna. The signal grounding module is configured to short the feedback signal to a grounding end by the second level control switch unit. The signal feedback module is configured to receive a feedback signal sent by the external radio frequency port without the external antenna. The signal grounding module is configured to short the feedback signal to

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