Conversion circuit and picocell system

Abstract

This application discloses a conversion circuit and a pico base station system. The conversion circuit includes a first conversion circuit and a second conversion circuit. The first conversion circuit is connected to a hub unit (pHUB) via a first network cable and is used to separate the first baseband data signal and the power supply voltage signal used to power the target pRRU from the first network transmission signal sent by the pHUB to the target pRRU, and convert them into a first optical signal for transmission through an optical fiber. The second conversion circuit is connected to the first conversion circuit via the optical fiber and to the target pRRU via a second network cable. It is used to convert the first optical signal received through the optical fiber into the first baseband data signal and the power supply voltage signal, and transmit them to the target pRRU via the second network cable.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a conversion circuit and a pico base station system. Background Technology

[0002] Currently, in indoor mobile communication coverage scenarios, the hub unit (pHUB) to the remote radio unit (pRRU) of a 4G picocell base station system is connected by a network cable. As the length of the network cable increases, signal transmission becomes unstable, resulting in severe packet loss or failure to transmit data. To ensure data transmission stability, current designs require that the transmission distance of the network cable not exceed 100 meters. This limits the network transmission distance to no more than 100 meters, restricting product application scenarios and preventing expansion into outdoor environments.

[0003] How to improve the transmission distance between the pHUB device and pRRU in a 4G pico base station system while ensuring data transmission stability, and expand the application scenarios of the 4G pico base station system, is a technical problem that needs to be solved. Summary of the Invention

[0004] The purpose of this application is to provide a conversion circuit and a pico base station system to solve the problem of limited transmission distance in current 4G pico base station systems.

[0005] To solve the above-mentioned technical problems, this specification is implemented as follows:

[0006] In a first aspect, a conversion circuit is provided, including a first conversion circuit and a second conversion circuit.

[0007] The first conversion circuit is connected to the hub unit pHUB via a first network cable. It is used to separate the first baseband data signal and the power supply voltage signal used to power the target pRRU from the first network transmission signal sent by the pHUB to the target pRRU, and convert them into a first optical signal for transmission through optical fiber.

[0008] The second conversion circuit is connected to the first conversion circuit via the optical fiber and to the target pRRU via the second network cable. It is used to convert the first optical signal received through the optical fiber into the first baseband data signal and the power supply voltage signal, and transmit them to the target pRRU via the second network cable.

[0009] Optionally, the second conversion circuit is further configured to: separate the second baseband data signal carried in the second network transmission signal sent by the target pRRU to the pHUB and the load voltage signal of the target pRRU, and convert them into a second optical signal for transmission through the optical fiber;

[0010] The first conversion circuit is further configured to: convert the second optical signal received through the optical fiber into the second baseband data signal and the load voltage signal, and transmit them to the pHUB through the first network cable.

[0011] Optionally, the first conversion circuit includes:

[0012] The first packaging module has a first end connected to the pHUB via the first network cable. It is used to separate the power supply voltage signal from the first network transmission signal, convert it into first voltage data, and repackage it with the first baseband data signal to obtain a first electrical signal, which is then output through the second end.

[0013] The first electro-optical conversion module has a first end connected to the second end of the first encapsulation module and a second end connected to the optical fiber. It is used to convert the first electrical signal into the first optical signal and transmit it to the second conversion circuit through the optical fiber.

[0014] Optionally, the second conversion circuit includes:

[0015] The first photoelectric conversion module has a first end connected to the optical fiber, used to convert the first optical signal into a second electrical signal and output it through the second end;

[0016] The second packaging module has a first end connected to the second end of the first photoelectric conversion module, and a second end connected to the target pRRU via the second network cable. It is used to separate the first voltage data from the second electrical signal, repackage the first baseband data signal carried in the second electrical signal and transmit it to the target pRRU through the second end, and output the first voltage data through the third end.

[0017] The second load management module has a first end connected to the third end of the second encapsulation module and a second end connected to the target pRRU via the second network cable. It is used to transmit the first voltage data to the target pRRU after the load simulates the power supply voltage signal.

[0018] Optionally, the second load management module includes:

[0019] The second analysis unit has its first end connected to the third end of the second packaging module, and is used to map the corresponding power supply voltage value according to the first voltage data and output it through the second end;

[0020] The second power load has its first terminal connected to the second terminal of the second analysis unit. It is used to adjust the load according to the power supply voltage value and output the first load through the second terminal.

[0021] The second power supply has a first end connected to the second end of the second power supply load, and the second end connected to the target pRRU via the second network cable, for outputting the power supply voltage signal to the target pRRU according to the first load.

[0022] Optionally, the second power supply is further configured to: transmit the load voltage signal carried in the second network transmission signal received through the second network cable to the power supply synchronization load through the first terminal;

[0023] The power synchronization load is also used to: perform load synchronization according to the load voltage signal, and transmit the synchronized second load data to the second analysis unit through the first terminal;

[0024] The second analysis unit is further configured to: map the corresponding second voltage data according to the second load data, and output it through the first terminal;

[0025] The second conversion circuit further includes:

[0026] The third encapsulation module has a first end connected to the target pRRU via the second network cable, and a third end connected to the first end of the second analysis unit. It is used to separate the load voltage signal from the second network transmission signal, and re-encapsulate the second baseband data signal and the second voltage data carried in the second network transmission signal to obtain a third electrical signal, which is then output through the second end.

[0027] The second electro-optical conversion module has a first end connected to the second end of the third encapsulation module and a second end connected to the optical fiber. It is used to convert the third electrical signal into a third optical signal and transmit it to the first conversion unit through the optical fiber.

[0028] Optionally, the first conversion unit further includes:

[0029] The second photoelectric conversion module has its first end connected to the optical fiber and is used to convert the third optical signal into a fourth electrical signal, which is then output through the second end.

[0030] The fourth encapsulation module has a first end connected to the second end of the second photoelectric conversion module, and a second end connected to the pHUB via the first network cable. It is used to separate the second voltage data from the second network transmission signal, re-encapsulate the second baseband data signal and transmit it to the pHUB via the first network cable, and output the second voltage data through the third end.

[0031] The first load management module has a first end connected to the third end of the fourth encapsulation module and a second end connected to the pHUB via the first network cable. It is used to transmit the second voltage data to the target pRRU via the first network cable after the load is simulated as the load voltage signal.

[0032] Optionally, the first load management module includes:

[0033] The first analysis unit, with its first end connected to the third end of the fourth packaging module, is used to map the corresponding load voltage signal according to the second voltage data and output it through the second end;

[0034] The first power load has a first terminal connected to the second terminal of the first analysis unit, and is used to adjust the load according to the load voltage signal, and output the second load through the second terminal.

[0035] A first power supply has a first terminal connected to the second terminal of the first power supply load, and the second terminal connected to the pHUB via the first network cable, for outputting the load voltage signal to the pHUB according to the second load.

[0036] Optionally, the lengths of the first network cable and the second network cable are 10-20 centimeters.

[0037] Optionally, the length of the optical fiber is greater than 2 kilometers.

[0038] In a second aspect, a pico base station system is provided, including a pHUB, a pRRU, and a conversion circuit as described in the first aspect above, the conversion circuit being disposed between the pHUB and the pRRU.

[0039] In this embodiment, by adding a conversion unit and optical fiber between the pHUB and pRRU, the transmission distance between the pHUB and pRRU can be significantly improved without changing the original data transmission mode of the pico base station system. This expands the application scenarios of the pico base station system beyond indoors to include outdoor environments, enhancing its versatility. Thus, the problem of limited network cable transmission distance between the pHUB and pRRU is solved with minimal modification cost. Attached Figure Description

[0040] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0041] Figure 1 This is a block diagram of the conversion circuit according to an embodiment of this application.

[0042] Figure 2This is an application scenario diagram of the conversion circuit in an embodiment of this application.

[0043] Figure 3 This is a structural block diagram of the forward link corresponding module of the conversion circuit in an embodiment of this application.

[0044] Figure 4 This is a structural block diagram of the reverse link module of the conversion circuit in an embodiment of this application.

[0045] Figure 5 This is a schematic diagram of the overall architecture of the conversion circuit in an embodiment of this application.

[0046] Figure 6 This is a hardware schematic diagram of the implementation of each module of the conversion circuit in an embodiment of this application. Detailed Implementation

[0047] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. The drawing numbers in this application are only used to distinguish the various steps in the solution and are not used to limit the execution order of the various steps. The specific execution order is subject to the description in the specification.

[0048] To address the problems existing in the prior art, this application provides a conversion circuit, including a first conversion circuit and a second conversion circuit. The first conversion circuit is connected to a hub unit (pHUB) via a first network cable, and is used to separate the first baseband data signal and the power supply voltage signal used to power the target pRRU from the first network transmission signal sent by the pHUB to the target pRRU, and convert them into a first optical signal for transmission through an optical fiber. The second conversion circuit is connected to the first conversion circuit via the optical fiber and to the target pRRU via a second network cable, and is used to convert the first optical signal received through the optical fiber into the first baseband data signal and the power supply voltage signal, and transmit them to the target pRRU via the second network cable.

[0049] refer to Figure 1 , Figure 1 This is a block diagram of the conversion circuit according to an embodiment of this application.

[0050] As shown in the figure, the conversion circuit 10 includes a first conversion circuit 100 and a second conversion circuit 200. The first conversion circuit 100 is connected to the pHUB 20 via a network cable, and the second conversion circuit 200 is connected to the pRRU 30 via a network cable. The first conversion circuit 100 and the second conversion circuit 200 are connected by an optical fiber, thereby connecting the pHUB 20 and the pRRU 30 through the conversion circuit 10 and the optical fiber to establish a network signal transmission link.

[0051] exist Figure 1 In this embodiment, only one pHUB is shown. In practical applications, one pHUB can connect to multiple pRRUs. In this case, a data transmission link is established between the pHUB and each pRRU through a conversion circuit, such as... Figure 2 As shown.

[0052] In a pico base station system 1000 corresponding to a pHUB and multiple pRRUs 1, pRRU 2, ... pRRU n, multiple conversion circuits 1, conversion circuit 2, ... conversion circuit n are arranged one-to-one between the pHUB and the multiple pRRUs.

[0053] The following description will take the conversion circuit set between the pHUB and a pRRU as an example. The structure and working principle of each conversion circuit are the same, so they will not be described in detail.

[0054] Return to reference Figure 1 The first conversion circuit 100 separates the baseband data signal and the power supply voltage signal used to power the pRRU 30 from the network transmission signal sent by the pHUB 20 to the RRU 30 via the network cable, and converts them into a first optical signal, which is then transmitted to the second conversion circuit 200 via optical fiber. Next, the second conversion circuit 200 converts the first optical signal received via optical fiber back into the original baseband data signal and power supply voltage signal, and transmits them to the pRRU 30 via the network cable.

[0055] Optionally, the second conversion circuit is further configured to: separate the second baseband data signal carried in the second network transmission signal sent by the target pRRU to the pHUB and the load voltage signal of the target pRRU, and convert them into a second optical signal for transmission through the optical fiber; the first conversion circuit is further configured to: convert the second optical signal received through the optical fiber into the second baseband data signal and the load voltage signal, and transmit them to the pHUB through the first network cable.

[0056] Thus, when pRRU 30 transmits network transmission signals to pHUB 20, the second conversion circuit 200 can similarly separate the baseband data signal and the current load voltage signal of pRRU 30 carried in the network transmission signal sent by pRRU 30 to pHUB 20 via the network cable, and convert them into a second optical signal for transmission to the first conversion circuit 100 via optical fiber. Then, the first conversion circuit 100 converts the second optical signal received via optical fiber back into the original baseband data signal and load voltage signal, and transmits them to pHUB 20 via the network cable.

[0057] Therefore, for the devices pHUB20 and pRRU 30 at both ends, pHUB20 still transmits electrical signals, including baseband data signals and power supply voltage signals for pRRU 30, via the original network cable transmission mode. Similarly, pRRU 30 receives the electrical signals transmitted by pHUB20 via the original network cable transmission mode. The addition of optical fiber and conversion units maintains the original data transmission mode but significantly increases the transmission distance between pHUB20 and pRRU 30. This expands the application scenarios of the pico base station system beyond indoors to include outdoor environments, enhancing its versatility.

[0058] The following is combined with Figure 3 , Figure 4 and Figure 5 The corresponding modules of the forward and reverse links of the conversion circuit in the embodiments of this application will be described in detail.

[0059] The forward link refers to the link from pHUB20 to pRRU30 that transmits network signals. The signal routing is as follows: Figure 3 As shown; the reverse link refers to the link from pRRU 30 to pHUB20 that transmits signals through the network, and the signal routing is as follows. Figure 4 As shown. The overall signal transmission link can be referenced. Figure 5 The HUB conversion unit - front end represents the first conversion circuit, and the HUB conversion unit - rear end represents the second conversion circuit.

[0060] Optionally, the first conversion circuit includes: a first encapsulation module, with its first end connected to the pHUB via the first network cable, for separating the power supply voltage signal from the first network transmission signal and converting it into first voltage data and the first baseband data signal, which are then re-encapsulated to obtain a first electrical signal, and output through the second end; and a first electro-optical conversion module, with its first end connected to the second end of the first encapsulation module and its second end connected to the optical fiber, for converting the first electrical signal into the first optical signal and transmitting it to the second conversion circuit through the optical fiber.

[0061] like Figure 3As shown, the first conversion circuit 100 includes a first packaging module 102 and a first electro-optical conversion module 104.

[0062] The first encapsulation module 102 is connected to the pHUB 20 at one end via a first network cable, and to the first electro-optical conversion module 104 at the other end. The first encapsulation module 102 receives a first network transmission signal from the pHUB 20 via the first network cable. This signal carries a first baseband data signal and a power supply voltage signal for powering the pRRU 30. The first encapsulation module 102 analyzes the baseband data, separating the power supply voltage signal from the first network transmission signal and converting it into first voltage data, that is, converting the electrical signal of the power supply voltage signal into corresponding power supply voltage data. Then, using the Enhanced Common Public Radio Interface (E-CRPRI) protocol, it re-encapsulates the first baseband data signal to obtain a first electrical signal, which is then transmitted to the first electro-optical conversion module 104 via the second end.

[0063] exist Figure 5 In the process, the first encapsulation module 102 performs the steps of baseband data parsing, power supply signaling separation and E-CRPRI protocol encapsulation in the HUB conversion unit-front end. The port indicates that the pHUB is connected to a pRRU. A network cable is connected between the port and the pHUB. The output of the first encapsulation module 102 is connected to the port through the Ethernet port (ETH). The port is then connected to the second network cable to achieve connection with the pRRU 30.

[0064] One end of the first electro-optical conversion module 104 is connected to the first encapsulation module, and the other end is connected to the optical fiber, so that the re-encapsulated first electrical signal is converted into a first optical signal, which can then be transmitted through the optical fiber.

[0065] exist Figure 5 In this process, the first electro-optical conversion module 104 performs the electro-optical signal conversion step and is connected to the optical fiber through the optical port (SFP).

[0066] The other end of the optical fiber is connected to the second conversion circuit 200, i.e., the back end of the HUB conversion unit, through an optical port, so as to transmit the optical signal from the first conversion circuit 100 to the second conversion circuit 200.

[0067] Optionally, the second conversion circuit includes:

[0068] A first photoelectric conversion module, with its first end connected to the optical fiber, converts the first optical signal into a second electrical signal and outputs it through its second end. A second encapsulation module, with its first end connected to the second end of the first photoelectric conversion module and its second end connected to the target pRRU via the second network cable, separates the first voltage data from the second electrical signal, re-encapsulates the first baseband data signal carried in the second electrical signal, transmits it to the target pRRU through its second end, and outputs the first voltage data through its third end. A second load management module, with its first end connected to the third end of the second encapsulation module and its second end connected to the target pRRU via the second network cable, converts the first voltage data into the power supply voltage signal through a load and transmits it to the target pRRU through its second end.

[0069] like Figure 3 As shown, the second conversion circuit 200 includes a first photoelectric conversion module 202, a second packaging module 204, and a second load management module 206.

[0070] The first photoelectric conversion module 202 is connected to an optical fiber at one end and to the second packaging module 204 at the other end. The first photoelectric conversion module 202 receives a first optical signal through the optical fiber and converts the first optical signal into a second electrical signal.

[0071] exist Figure 5 In this process, the first photoelectric conversion module 202 performs the photoelectric signal conversion step and is connected to the optical fiber through the optical port (SFP).

[0072] The second encapsulation module 204 is connected at one end to the first photoelectric conversion module 202, at the other end to the pRRU 30 via a second network cable, and at the third end to the second load management module 206. The second encapsulation module 204 performs E-CRPR protocol parsing on the second electrical signal to obtain the first baseband data signal and the first voltage data, and separates the first voltage data from the second electrical signal, transmitting it to the second load management module 206. Then, it re-encapsulates the first baseband data signal and transmits it to the pRRU 30 via the second network cable.

[0073] exist Figure 5 In the process, the second encapsulation module 204 performs the steps of E-CRPR protocol parsing, power supply signaling separation and baseband data encapsulation in the HUB conversion unit-backend. A second network cable is connected between the port and pRRU 30. The output of the second encapsulation module 204 is connected to the port through the ETH network port, thereby connecting to the second network cable through the port.

[0074] The second load management module 206 is connected at one end to the second encapsulation module 204, and at the other end to the second network cable via a port, thereby connecting to the pRRU 30. The second load management module 206 converts the first voltage data into a power supply voltage signal through the load and transmits it to the pRRU 30 via the second network cable.

[0075] Optionally, the second load management module includes: a second analysis unit, with its first end connected to the third end of the second packaging module, for mapping the corresponding supply voltage value according to the first voltage data and outputting it through the second end; a second power load, with its first end connected to the second end of the second analysis unit, for adjusting the load according to the supply voltage value and outputting the first load through the second end; and a second power supply, with its first end connected to the second end of the second power load and its second end connected to the target pRRU through the second network cable, for outputting the supply voltage signal to the target pRRU according to the first load.

[0076] exist Figure 5 In the process, the second analysis unit corresponds to the step of performing power supply signaling analysis in the HUB conversion unit - back-end, and the second power load corresponds to the step of performing power synchronization load. The second power supply is Power over Ethernet (PoE).

[0077] The second analysis unit analyzes and maps the first voltage data, assigns a corresponding supply voltage value, and outputs it to the second power load, thereby controlling the second power load to adjust the load according to the supply voltage value. The second power supply outputs a corresponding voltage signal to pRRU 30 according to the adjusted first load. This voltage signal is the supply voltage signal simulated by the second load management module based on the first voltage data.

[0078] Therefore, pRRU 30 receives the baseband signal transmitted by the second package circuit 204 and the power supply voltage signal transmitted by the POE power supply through the second network cable, thereby obtaining the first network transmission signal sent by pHUB 20 to pRRU 30.

[0079] The above describes the corresponding functions of each module in the forward link that transmits network transmission signals from pHUB 20 to pRRU 30 through the conversion circuit and optical fiber of the embodiments of this application. The following section, in conjunction with... Figure 4 and Figure 5 The corresponding functions of each module in the reverse link that transmits network transmission signals from pRRU 30 to pHUB 20 through the conversion circuit and optical fiber in the embodiments of this application are described.

[0080] Optionally, the second power supply is further configured to: transmit the load voltage signal carried in the second network transmission signal received through the second network cable to the power supply synchronization load through the first terminal; the power supply synchronization load is further configured to: perform load synchronization according to the load voltage signal, and transmit the synchronized second load data to the second analysis unit through the first terminal; the second analysis unit is further configured to: map the corresponding second voltage data according to the second load data, and output it through the first terminal.

[0081] The second conversion circuit further includes: a third encapsulation module, with its first end connected to the target pRRU via the second network cable and its third end connected to the first end of the second analysis unit, for separating the load voltage signal from the second network transmission signal, and re-encapsulating the second baseband data signal carried in the second network transmission signal with the second voltage data to obtain a third electrical signal, and outputting it through the second end; and a second electro-optical conversion module, with its first end connected to the second end of the third encapsulation module and its second end connected to the optical fiber, for converting the third electrical signal into a third optical signal and transmitting it to the first conversion unit through the optical fiber.

[0082] pRRU 30 implements corresponding control and load adjustment based on the network transmission signals sent by pHUB 20, and needs to feed back the current working status from pHUB 20.

[0083] In this scenario, the second conversion circuit needs to convert the second network transmission signal sent from pRRU 30 to pHUB 20 via the second network cable and transmit it to the first conversion circuit via optical fiber. Upon receiving the optical signal transmitted via optical fiber, the first conversion circuit processes and restores it to the second network transmission signal, which is then transmitted to pHUB 20 via the first network cable.

[0084] Specifically, the second power supply of the second load management circuit 206 outputs the load voltage signal carried in the second network transmission signal sent by pRRU 30 through the second network cable to the power synchronization load. The power synchronization load performs load synchronization according to the load voltage signal output by the second power supply and transmits the synchronized second load data to the second analysis unit. The second analysis unit then analyzes and maps the second load data, assigns the corresponding voltage value, obtains the second voltage data, and outputs it.

[0085] like Figure 4 As shown, the second conversion circuit also includes a third packaging module 208 and a second electro-optical conversion module 230.

[0086] One end of the third encapsulation module 208 is connected to the pRRU 30 via the second network cable, thereby separating the load voltage signal from the second network transmission signal. Another end of the third encapsulation module 208 is connected to the output of the second analysis unit, re-encapsulating the second voltage data output by the second analysis unit with the separated load voltage signal from the second baseband data signal to obtain a third electrical signal. The third end of the third encapsulation module 208 is connected to the second electro-optical conversion module 230, thereby transmitting the third electrical signal to the second electro-optical conversion module 230. The other end of the second electro-optical conversion module 230 is connected to an optical fiber, and after converting the third electrical signal into a third optical signal, it is transmitted to the first conversion unit 100 via the optical fiber.

[0087] exist Figure 5 In the process, the third encapsulation module 208 performs the steps of baseband data parsing, power supply signaling separation, and E-CRPRI protocol encapsulation in the HUB conversion unit backend. The second electro-optical conversion module 230 performs the step of electro-optical signal conversion and connects to the optical fiber through the optical port (SFP).

[0088] After receiving the optical signal transmitted through the optical fiber, the first conversion circuit converts and restores it into a second network transmission signal, which is then transmitted to the pHUB 20 via the first network cable.

[0089] Optionally, the first conversion unit further includes: a second photoelectric conversion module, with its first end connected to the optical fiber, for converting the third optical signal into a fourth electrical signal and outputting it through its second end; a fourth encapsulation module, with its first end connected to the second end of the second photoelectric conversion module and its second end connected to the pHUB through the first network cable, for separating the second voltage data from the second network transmission signal, re-encapsulating the second baseband data signal and transmitting it to the pHUB through the first network cable, and outputting the second voltage data through its third end; and a first load management module, with its first end connected to the third end of the fourth encapsulation module and its second end connected to the pHUB through the first network cable, for converting the second voltage data into a load voltage signal through a load and transmitting it to the target pRRU through the first network cable.

[0090] like Figure 4 As shown, the first conversion unit 100 also includes a second photoelectric conversion module 106, a fourth packaging module 108, and a first load management module 110.

[0091] The second photoelectric conversion module 106 is connected to an optical fiber via an optical port (SFP) at one end and to the fourth packaging module 108 at the other end. The second photoelectric conversion module 106 converts the third optical signal received through the optical fiber into a fourth electrical signal and transmits it to the fourth packaging module 108.

[0092] exist Figure 5 In this process, the second photoelectric conversion module 106 performs the photoelectric signal conversion step.

[0093] The fourth encapsulation module 108 is connected at one end to the second photoelectric conversion module 106, at the other end to the pHUB 20 via a first network cable, and at the third end to the first load management module 110. The fourth encapsulation module 108 performs E-CRPR protocol parsing on the fourth electrical signal to obtain the second baseband data signal and the second voltage data, then separates the second voltage data from the fourth electrical signal and transmits it to the first load management module 110. Then, it re-encapsulates the second baseband data signal and transmits it to the pHUB 20 via the first network cable.

[0094] exist Figure 5 In the process, the fourth encapsulation module 108 performs the steps of E-CRPR protocol parsing, power supply signaling separation and baseband data encapsulation in the HUB conversion unit-front end. A first network cable is connected between the port and the pHUB 20. The output of the fourth encapsulation module 108 is connected to the port through the ETH network port, thereby connecting to the first network cable through the port.

[0095] The first load management module 110 is connected at one end to the fourth packaging module 108, and at the other end to the first network cable via a port, thereby achieving connection with the pHUB 20. The first load management module 110 converts the second voltage data into a load voltage signal through the load simulation, and transmits it to the pHUB 20 via the first network cable.

[0096] Optionally, the first load management module includes: a first analysis unit, with its first end connected to the third end of the fourth packaging module, for mapping a corresponding load voltage signal according to the second voltage data and outputting it through a second end; a first power load, with its first end connected to the second end of the first analysis unit, for adjusting the load according to the load voltage signal and outputting a second load through the second end; and a first power supply, with its first end connected to the second end of the first power load and its second end connected to the pHUB through the first network cable, for outputting the load voltage signal to the pHUB according to the second load.

[0097] exist Figure 5 In the process, the first analysis unit corresponds to the step of performing power supply signaling analysis in the HUB conversion unit - front end, the first power load corresponds to the step of performing power load, and the first power supply is Power over Ethernet (POE).

[0098] The first analysis unit analyzes and maps the second voltage data, assigns a corresponding load voltage value, and outputs it to the first power supply load, thereby controlling the first power supply load to adjust the load according to the load voltage value. The first power supply outputs a corresponding voltage signal to pHUB 20 according to the adjusted second load. This voltage signal is the load voltage signal simulated by the first load management module based on the second voltage data.

[0099] Therefore, pHUB 20 receives the baseband signal transmitted by the fourth package circuit 108 and the load voltage signal transmitted by the POE power supply through the first network cable, thereby obtaining the second network transmission signal sent by pRRU 30 to pHUB 20.

[0100] In the embodiments of this application, the hardware implementation of the corresponding module of the conversion circuit can be referred to Figure 5 and Figure 6 , Figure 6 This is a hardware schematic diagram of the implementation of the conversion circuit module in an embodiment of this application.

[0101] As shown in the figure, in the conversion circuit, the baseband data parsing and encapsulation, power supply signaling separation, and E-CRPR protocol parsing and encapsulation of each packaged module can be realized through a Field Programmable Gate Array (FPGA). The power supply signaling analysis function of each analysis module can be realized through the central processing unit ARM.

[0102] Figure 6 The diagram illustrates the FPGA, ARM, power supply, and load involved in the first conversion circuit located on the pHUB side. The power supply is, for example, a DC 48V input, supplying power to the corresponding power module. The load corresponds to a DC 48V load. The photoelectric or electro-optical conversion module is a digital optical module. The FPGA is connected between the digital optical module on the pHUB side and the digital optical module on the pRRU side. It processes the electrical signals converted by the digital optical module, separates the voltage data, transmits it to the ARM for corresponding voltage assignment, and provides it to the DC 48V load to adjust the power load output, thereby simulating the actual working load of the pRRU. The pHUB can monitor the actual working load of the corresponding pRRU in real time by detecting the DC 48V input voltage signal transmitted via the network cable.

[0103] Similarly, the hardware implementation of the FPGA, ARM, power supply and load involved in the second conversion circuit on the pRRU side can be similar to the first conversion circuit mentioned above, and will not be described again here.

[0104] In addition, an external power supply was added to power the pRRU backend for normal operation, such as Figure 5As shown, the power supply on the pRRU side can be provided by a power supply module. In one embodiment, the power supply module can be powered by, for example, a local AC220V input.

[0105] Optionally, the lengths of the first network cable and the second network cable are 10-20 centimeters. The length of the optical fiber is greater than 2 kilometers.

[0106] In this embodiment, through the conversion circuit and optical fiber, the pRRU can still obtain power, baseband data signals, and supply voltage signals from the pHUB via a PoE network cable. For the pRRU, connecting to the second conversion circuit via a network cable is equivalent to directly connecting to the pHUB, and the interface and network transmission protocol are completely consistent with the original pico base station system. On the pHUB side, the pHUB can still obtain baseband data signals and load voltage signals from the pRRU via a PoE network cable. For the pHUB, connecting to the first conversion circuit via a network cable is equivalent to directly connecting to the pRRU, and the interface and network transmission protocol are completely consistent with the original pico base station system. Therefore, there is no impact on the original pico base station system.

[0107] The addition of fiber optic cables and conversion units does not change the data transmission mode of the original picocell base station system, but it significantly improves the transmission distance between the pHUB and pRRU. The application scenarios of the picocell base station system are not only suitable for indoor use, but can also be extended to outdoor scenarios, improving its versatility. Thus, the problem of limited network cable transmission distance between the pHUB and pRRU can be solved with minimal modification cost without affecting the original picocell base station system.

[0108] In addition, to achieve power supply, a load management module was added to realize load synchronization of pRRU. The synchronous load voltage is adjusted in real time according to the actual power supply of pRRU to reflect the actual power supply status of pRRU, so that pHUB can detect the power supply status of pRRU and meet the power supply detection requirements.

[0109] According to one embodiment of this application, a pico base station system is also provided, including: a pHUB, a pRRU, and as described above. Figures 1 to 6 The conversion circuit described in any embodiment is disposed between the pHUB and the pRRU.

[0110] The conversion circuit in this embodiment can achieve... Figures 1 to 6 To avoid repetition, the various processes implemented in the embodiments will not be described again here.

[0111] The architecture of the pico base station system can be referenced. Figure 2 A pico base station system includes a pHUB and multiple pRRUs connected to it. Each pRRU is connected to the pHUB by a conversion circuit, thereby enabling long-distance network signal transmission of the pico base station system.

[0112] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0113] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0114] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A conversion circuit, characterized in that, Includes a first conversion circuit and a second conversion circuit. The first conversion circuit is connected to the hub unit pHUB via a first network cable. It is used to separate the first baseband data signal and the power supply voltage signal used to power the target pRRU from the first network transmission signal sent by the pHUB to the target pRRU, and convert them into a first optical signal for transmission through optical fiber. The second conversion circuit is connected to the first conversion circuit via the optical fiber and to the target pRRU via the second network cable. It is used to convert the first optical signal received through the optical fiber into the first baseband data signal and the power supply voltage signal, and transmit them to the target pRRU via the second network cable. The first conversion circuit includes: a first encapsulation module, the first end of which is connected to the pHUB via the first network cable, for separating the power supply voltage signal from the first network transmission signal and converting it into first voltage data and the first baseband data signal, which are then re-encapsulated to obtain a first electrical signal, and output through the second end; and a first electro-optical conversion module, the first end of which is connected to the second end of the first encapsulation module and the second end of which is connected to the optical fiber, for converting the first electrical signal into the first optical signal and transmitting it to the second conversion circuit through the optical fiber.

2. The conversion circuit as described in claim 1, characterized in that, The second conversion circuit is further configured to: separate the second baseband data signal carried in the second network transmission signal sent by the target pRRU to the pHUB and the load voltage signal of the target pRRU, and convert them into a second optical signal for transmission through the optical fiber; The first conversion circuit is further configured to: convert the second optical signal received through the optical fiber into the second baseband data signal and the load voltage signal, and transmit them to the pHUB through the first network cable.

3. The conversion circuit as described in claim 2, characterized in that, The second conversion circuit includes: The first photoelectric conversion module has a first end connected to the optical fiber, used to convert the first optical signal into a second electrical signal and output it through the second end; The second packaging module has a first end connected to the second end of the first photoelectric conversion module, and a second end connected to the target pRRU via the second network cable. It is used to separate the first voltage data from the second electrical signal, repackage the first baseband data signal carried in the second electrical signal and transmit it to the target pRRU through the second end, and output the first voltage data through the third end. The second load management module has a first end connected to the third end of the second encapsulation module and a second end connected to the target pRRU via the second network cable. It is used to transmit the first voltage data to the target pRRU after the load simulates the power supply voltage signal.

4. The conversion circuit as described in claim 3, characterized in that, The second load management module includes: The second analysis unit has its first end connected to the third end of the second packaging module, and is used to map the corresponding power supply voltage value according to the first voltage data and output it through the second end; The second power load has its first terminal connected to the second terminal of the second analysis unit. It is used to adjust the load according to the power supply voltage value and output the first load through the second terminal. The second power supply has a first end connected to the second end of the second power supply load, and the second end connected to the target pRRU via the second network cable, for outputting the power supply voltage signal to the target pRRU according to the first load.

5. The conversion circuit as described in claim 4, characterized in that, The second power supply is also used to: transmit the load voltage signal carried in the second network transmission signal received through the second network cable to the second power supply load through the first terminal; The second power load is also used for: performing load synchronization based on the load voltage signal, and transmitting the synchronized second load data to the second analysis unit through the first terminal; The second analysis unit is further configured to: map the corresponding second voltage data according to the second load data, and output it through the first terminal; The second conversion circuit further includes: The third encapsulation module has a first end connected to the target pRRU via the second network cable, and a third end connected to the first end of the second analysis unit. It is used to separate the load voltage signal from the second network transmission signal, and re-encapsulate the second baseband data signal and the second voltage data carried in the second network transmission signal to obtain a third electrical signal, which is then output through the second end. The second electro-optical conversion module has a first end connected to the second end of the third encapsulation module and a second end connected to the optical fiber. It is used to convert the third electrical signal into a third optical signal and transmit it to the first conversion circuit through the optical fiber.

6. The conversion circuit as described in claim 5, characterized in that, The first conversion circuit further includes: The second photoelectric conversion module has its first end connected to the optical fiber and is used to convert the third optical signal into a fourth electrical signal, which is then output through the second end. The fourth encapsulation module has a first end connected to the second end of the second photoelectric conversion module, and a second end connected to the pHUB via the first network cable. It is used to separate the second voltage data from the second network transmission signal, re-encapsulate the second baseband data signal and transmit it to the pHUB via the first network cable, and output the second voltage data through the third end. The first load management module has a first end connected to the third end of the fourth encapsulation module and a second end connected to the pHUB via the first network cable. It is used to transmit the second voltage data to the target pRRU via the first network cable after the load is simulated as the load voltage signal.

7. The conversion circuit as described in claim 6, characterized in that, The first load management module includes: The first analysis unit, with its first end connected to the third end of the fourth packaging module, is used to map the corresponding load voltage signal according to the second voltage data and output it through the second end; The first power load has a first terminal connected to the second terminal of the first analysis unit, and is used to adjust the load according to the load voltage signal, and output the second load through the second terminal. A first power supply has a first terminal connected to the second terminal of the first power supply load, and the second terminal connected to the pHUB via the first network cable, for outputting the load voltage signal to the pHUB according to the second load.

8. The conversion circuit as described in any one of claims 1 to 7, characterized in that, The length of the optical fiber is greater than 2 kilometers.

9. A picocell base station system, characterized in that, include: pHUB, pRRU, and the conversion circuit as described in any one of claims 1-8, wherein the conversion circuit is disposed between the pHUB and the pRRU.

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