Distributed base station

Abstract

The utility model provides a distributed base station, which relates to the technical field of communication, and is characterized in that a baseband device is connected with each passive optical splitter through a transmission optical cable, and each passive optical splitter is connected with a plurality of coverage amplification devices through a plurality of single-core rubber-covered wire optical cables; the baseband device is used for carrying out baseband processing on a first signal from the core network device to obtain a first baseband digital signal and respectively transmitting the first baseband digital signal to each coverage amplification device; the coverage amplification equipment is used for radiating out the first baseband digital signal and transmitting an obtained second baseband digital signal back to the baseband equipment; and the baseband equipment is also used for restoring the second baseband digital signal to obtain a second signal and transmitting the second signal to the core network equipment. In the technical scheme provided by the utility model, each piece of coverage amplification equipment is connected to the baseband equipment through the single-core rubber-covered wire optical cable, the passive optical splitter and the transmission optical cable in sequence, so that single-point compensation coverage is realized, the flexibility is high, and the safety is strong.

Description

Technical Field

[0001] This utility model relates to the field of communication technology, and in particular to a distributed base station. Background Technology

[0002] With the increasing scale of 4G (4th generation mobile communication technology) and 5G (5th generation mobile communication technology) applications and the deepening of application scenarios, there is a strong demand for supplementary coverage in some coverage blind spots, merchants, and stores. However, traditional indoor distribution systems and community coverage methods are inadequate in dealing with deep coverage in homes, and indoor signal complaints are difficult to resolve with limited investment.

[0003] Currently, the challenges in providing network coverage for in-home users can be summarized in the following scenarios:

[0004] 1. High-rise residential communities with large apartments: Difficulty in selecting macro base stations; inability of traditional indoor distribution systems to be installed in homes; poor coverage between buildings; clear user needs regarding indoor content and coverage requirements;

[0005] 2. Villa-dense areas: Traditional macro base stations lack sufficient coverage depth; traditional indoor distribution systems cannot be installed in homes; coordination with homeowners regarding community coverage is difficult; customer ARUP (Average Revenue per User) is high.

[0006] 3. Dense office buildings: Macro base station site selection is difficult, and traditional indoor distribution systems cannot be installed inside offices; cross-building coverage cannot meet the required coverage effect.

[0007] Based on this, two solutions have emerged that differ from traditional indoor distribution systems and can achieve in-home network coverage: one is the in-home full-coverage device; the other is a low-cost 4G / 5G integrated small base station. Both solutions have significant limitations:

[0008] (1) The in-home full-grid equipment adopts the repeater principle, which requires an external receiving antenna and a certain degree of isolation. The indoor wiring needs to be exposed, which will cause some interference to the outdoor macro station. It cannot be used in large quantities and has a high failure rate. Its advantage is that the technology is relatively mature.

[0009] (2) Low-cost 4G / 5G integrated small base stations transmit back through broadband networks, which requires the installation of an Internet gateway in the mobile core network, making them vulnerable to external attacks and posing certain security risks. At the same time, each integrated small base station is a combination of a BBU (Building Baseband Unit) and an RRU (Remote Radio Unit), which requires parameter configuration and is relatively wasteful of network resources. In addition, each integrated small base station requires an independent 5G baseband board, which is currently costly. Utility Model Content

[0010] This utility model was developed to at least partially solve the technical problems of high cost, poor security, and low user acceptance in existing home network coverage solutions.

[0011] According to one aspect of this utility model, a distributed base station is provided, comprising: a baseband device, at least one passive optical splitter, and multiple coverage amplification devices; the baseband device is connected to each of the passive optical splitters via transmission optical cables, and each of the passive optical splitters is connected to multiple coverage amplification devices via multiple single-core drop optical cables; the baseband device is used to perform baseband processing on a first signal from a core network device to obtain a first baseband digital signal, and transmit the first baseband digital signal sequentially to each coverage amplification device via the transmission optical cable, the passive optical splitter, and the single-core drop optical cables; the coverage amplification devices are used to radiate the first baseband digital signal transmitted from the baseband device, and to transmit the obtained second baseband digital signal back to the baseband device sequentially via the single-core drop optical cable, the passive optical splitter, and the transmission optical cable; the baseband device is also used to perform restoration processing on the second baseband digital signal transmitted back from each coverage amplification device to obtain a second signal, and transmit the second signal to the core network device.

[0012] Optionally, the baseband device includes a baseband unit and a first radio frequency link signal processing unit;

[0013] The baseband unit is used to perform first digital signal processing on the first signal from the core network equipment to obtain a first intermediate frequency signal, and output the first intermediate frequency signal to the first radio frequency link signal processing unit; the first radio frequency link signal processing unit is used to convert the first intermediate frequency signal into a first optical signal, and transmit the first optical signal to each coverage amplification device respectively, wherein the first optical signal is the first baseband digital signal;

[0014] The first radio frequency link signal processing unit is further configured to convert the second optical signal returned by each coverage amplification device into a second intermediate frequency signal, and output the second intermediate frequency signal to the baseband unit; the baseband unit is further configured to perform second digital signal processing on the second intermediate frequency signal to obtain a second signal, and transmit the second signal to the core network equipment, wherein the second optical signal is the second baseband digital signal.

[0015] Optionally, the first radio frequency link signal processing unit includes a first processing intermediate module and a first radio frequency digital electro-optic conversion and distribution module;

[0016] The first processing intermediate module is used to perform duplex selection, convert the first intermediate frequency signal from the baseband unit into a first radio frequency signal, amplify the first radio frequency signal, and output the amplified first radio frequency signal to the first radio frequency digital electro-optic conversion and distribution module; the first radio frequency digital electro-optic conversion and distribution module is used to convert the amplified first radio frequency signal into a first optical signal, and transmit the first optical signal to each coverage amplification device respectively.

[0017] The first radio frequency digital electro-optic conversion and distribution module is further configured to convert the second optical signal from each coverage amplification device into a second radio frequency signal, and output the second radio frequency signal to the first processing intermediate module; the first processing intermediate module is further configured to amplify the second radio frequency signal, and convert the amplified second radio frequency signal into a second intermediate frequency signal, and output the second intermediate frequency signal to the baseband unit.

[0018] Optionally, the baseband device is provided with at least one first optical port, and each passive optical splitter corresponds to one first optical port; the first optical port is used to send a first optical signal to the corresponding passive optical splitter and to receive a second optical signal from the corresponding passive optical splitter.

[0019] Optionally, the coverage amplification device includes a second radio frequency link signal processing unit and an antenna;

[0020] The second radio frequency link signal processing unit is used to convert the first optical signal from the baseband device into a first radio frequency signal and output the first radio frequency signal to the antenna; the antenna is used to radiate the first radio frequency signal, wherein the first optical signal is the first baseband digital signal;

[0021] The antenna is also used to receive a second radio frequency signal and output the second radio frequency signal to the second radio frequency link signal processing unit; the second radio frequency link signal processing unit is also used to convert the second radio frequency signal into a second optical signal and send the second optical signal back to the baseband device, wherein the second optical signal is the second baseband digital signal.

[0022] Optionally, the second radio frequency link signal processing unit includes a second radio frequency digital electro-optic conversion and distribution module and a second processing intermediate module;

[0023] The second radio frequency digital electro-optic conversion and distribution module is used to convert the first optical signal from the baseband device into a first radio frequency signal, and output the first radio frequency signal to the second processing intermediate module; the second processing intermediate module is used to perform duplex selection, and amplify the first radio frequency signal, and output the amplified first radio frequency signal to the antenna; the antenna radiates the amplified first radio frequency signal.

[0024] The second processing intermediate module is further configured to filter the received second radio frequency signal and output the filtered second radio frequency signal to the second radio frequency digital electro-optical conversion and distribution module; the second radio frequency digital electro-optical conversion and distribution module is further configured to convert the filtered second radio frequency signal into a second optical signal and send the second optical signal back to the baseband device.

[0025] Optionally, the coverage amplification device is provided with a second optical port, and multiple coverage amplification devices correspond to one passive optical splitter; the second optical port is used to receive a first optical signal from the corresponding passive optical splitter, and to send a second optical signal to the corresponding passive optical splitter.

[0026] Optionally, the baseband equipment is placed in the local office or a nearby community office; the coverage amplification equipment is placed in the indoor area to be covered by the network and has no testing ports, making it plug-and-play.

[0027] Optionally, the transmission optical cable is a two-core optical cable or a four-core optical cable.

[0028] Optionally, the ratio of the number of baseband devices to the number of coverage amplification devices is greater than or equal to 1 / 16 and less than or equal to 1 / 2.

[0029] The technical solution provided by this utility model can include the following beneficial effects:

[0030] In the distributed base station described in this invention, each coverage amplification device is sequentially connected to the baseband device via a single-core drop optical cable, a passive optical splitter, and a transmission optical cable, achieving single-point supplementary coverage with high flexibility and effectively solving the problem of network coverage for in-home applications. Furthermore, the passive optical splitter is connected to the coverage amplification device via a single-core drop optical cable, resulting in low deployment costs and high user acceptance; there are no other active devices between the baseband device and the coverage amplification device, ensuring strong security.

[0031] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0032] The accompanying drawings are provided to further understand the technical solution of this utility model and constitute a part of the specification. They are used together with the embodiments of this utility model to explain the technical solution of this utility model, and do not constitute a limitation on the technical solution of this utility model.

[0033] Figure 1 A schematic diagram of the structure of a distributed base station provided in an embodiment of this utility model;

[0034] Figure 2 This is a schematic diagram of another distributed base station provided in an embodiment of the present invention.

[0035] In the diagram: 1 - Baseband equipment; 2 - Baseband unit; 3 - First RF link signal processing unit; 4 - First processing intermediate module; 5 - First RF digital electro-optic conversion and distribution module; 6 - First optical port; 7 - Passive optical splitter; 71 - 1:8 passive optical splitter; 8 - Coverage amplification equipment; 9 - Second optical port; 10 - Second RF link signal processing unit; 11 - Second RF digital electro-optic conversion and distribution module; 12 - Second processing intermediate module; 13 - Antenna; 14 - Transmission optical cable; 15 - Single-core drop optical cable. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the specific implementation methods of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific implementation methods described herein are for illustration and explanation only and are not intended to limit the utility model.

[0037] It should be noted that the orientation or positional relationship indicated by various directional terms is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., in the specification and claims of this utility model are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence; and, where there is no conflict, the embodiments and features in the embodiments of this utility model can be arbitrarily combined with each other. It should be understood that when an element is referred to as "connected" or "coupled" to another element, it can be a direct connection or coupling to the other element, or there may be an intermediate element.

[0038] In practical applications, user complaints are often received when coverage blind spots exist. Currently, the following are the common solutions to user complaints about blind spots:

[0039] 1) Upgrade the existing network coverage system by adding points and feeder connections to achieve home network coverage. The disadvantages of this solution are high cost and difficulty in home installation.

[0040] 2) Using integrated small base stations to backhaul coverage via broadband PON (Passive Optical Network) in users' homes. The disadvantage of this solution is that backhauling via PON is insecure and easily cracked and attacked.

[0041] 3) Adding a full-cell macro station to the home uses the repeater principle, which requires an external receiving antenna and a certain degree of isolation. The indoor wiring needs to be run through the surface, which will cause some interference to the outdoor macro station. It cannot be used in large quantities and has a high failure rate. Its advantage is that the technology is relatively mature.

[0042] 4) Coverage using BBU+RHUB (Remote Radio Unit Hub)+PRRU (picoRRU) requires composite optical cables for home access. This solution has high equipment costs and is difficult to install in homes. It is suitable for medium and large coverage scenarios, but not for blind spot coverage.

[0043] Based on the shortcomings of the above-mentioned home network coverage methods, this utility model innovatively modifies the current integrated small base station and, on this basis, implements distributed networking, providing a distributed networking scheme. This scheme uses single-core drop fiber optic cables for home network coverage to solve current home network coverage problems, reduce the cost of home network coverage, improve security, and increase user acceptance. Specific embodiments are described in detail below.

[0044] Figure 1 This is a schematic diagram of the structure of a distributed base station provided in an embodiment of the present utility model. Figure 1 As shown, the distributed base station includes: a baseband device 1, at least one passive optical splitter 7, and multiple coverage amplification devices 8. Preferably, the ratio of the number of baseband devices 1 to the number of coverage amplification devices 8 is greater than or equal to 1 / 16 and less than or equal to 1 / 2, that is, the maximum number of coverage amplification devices 8 is 16 and the minimum is 2.

[0045] The baseband device 1 is connected to each passive optical splitter 7 via a transmission optical cable 14; each passive optical splitter 7 is connected to multiple coverage amplification devices 8 via multiple single-core drop optical cables 15.

[0046] The transmission optical cable is the operator's transmission network optical cable. Specifically, the transmission optical cable can be a two-core or four-core optical cable, meaning that the transmission between baseband equipment 1 and passive optical splitter 7 requires two-core or four-core optical cable resources. Passive optical splitter 7 is also called a passive fiber distribution box or passive optical splitter. To save costs, a single-core drop cable is used to connect passive optical splitter 7 and coverage amplification equipment 8.

[0047] Assuming the passive optical splitter 7 is a 1:N passive optical splitter, the distributed base station includes: one baseband device, n 1:N passive optical splitters, and M coverage amplification devices, where n, N, and M are all integers, n ≤ 4, and M = n * N. Each 1:N passive optical splitter is connected to N coverage amplification devices via N single-core drop cables. In practical applications, generally, N = 4, n = 4, M = 16; or, N = 8, n = 2, M = 16. Of course, this invention is not limited to these values; N can take other values ​​besides 4 and 8, and M can take other values ​​less than 16, for example, n = 2, N = 4, M = 8; or, n = 4, N = 2, M = 8; or, n = 3, N = 4, M = 12; or, n = 4, N = 3, M = 12; or, n = 1, N = 16, M = 16.

[0048] Furthermore, the optical energy distribution ratio of each passive optical splitter in at least one passive optical splitter can also be different. For example, at least one passive optical splitter may simultaneously include at least two of the following: 1:8 passive optical splitter, 1:6 passive optical splitter, 1:4 passive optical splitter, and 1:2 passive optical splitter.

[0049] Baseband device 1 performs baseband processing on a first signal from the core network equipment to obtain a first baseband digital signal, and transmits the first baseband digital signal sequentially through transmission optical cable 14, passive optical splitter 7, and single-core drop optical cable 15 to each coverage amplification device 8. Coverage amplification device 8 radiates the first baseband digital signal from baseband device 1 and transmits the obtained second baseband digital signal back to baseband device 1 sequentially through single-core drop optical cable 15, passive optical splitter 7, and transmission optical cable 14. Baseband device 1 also performs restoration processing on the second baseband digital signals transmitted back from each coverage amplification device 8 to obtain a second signal, and transmits the second signal to the core network equipment.

[0050] Specifically, the first signal is the forwarded signal from the core network equipment. This forwarded signal is a raw electrical signal. Baseband processing refers to the process of processing the raw electrical signal. The main purpose of baseband processing is to improve the quality and reliability of signal transmission. Conversely, restoration processing refers to the process of restoring the digital signal to the original electrical signal. Baseband equipment (e.g., Building Baseband Unit) and coverage amplification equipment (e.g., Remote Radio Unit) form a complete wireless communication system. The baseband equipment is mainly responsible for the processing and scheduling of digital signals, while the coverage amplification equipment is mainly responsible for the amplification and transmission of radio frequency signals. The two work together to ensure the normal operation of the wireless communication system.

[0051] The coverage amplification device 8 is connected to the baseband device 1 via a single-core drop optical cable 15, a passive optical splitter 7, and a transmission optical cable 14, thus achieving the purpose of single-point supplementary coverage.

[0052] In this embodiment, each coverage amplification device is connected to the baseband device sequentially via a single-core drop optical cable, a passive optical splitter, and a transmission optical cable, achieving single-point supplementary coverage with high flexibility and effectively solving the problem of in-home network coverage. Moreover, the passive optical splitter is connected to the coverage amplification device via a single-core drop optical cable, resulting in low deployment costs and high user acceptance; there are no other active devices between the baseband device and the coverage amplification device, ensuring strong security.

[0053] Figure 2 This is a schematic diagram of another distributed base station structure provided in an embodiment of the present utility model. Figure 2 As shown, the baseband device 1 includes a baseband unit 2 and a first radio frequency link signal processing unit 3.

[0054] The baseband unit 2 performs first digital signal processing on the first signal from the core network equipment to obtain a first intermediate frequency (IF) signal, and outputs the first IF signal to the first radio frequency (RF) link signal processing unit 3. The first RF link signal processing unit 3 converts the first IF signal into a first optical signal and transmits the first optical signal to each coverage amplification device 8, wherein the first optical signal is a first baseband digital signal.

[0055] The first radio frequency link signal processing unit 3 is further configured to convert the second optical signal returned by each coverage amplification device 8 into a second intermediate frequency signal, and output the second intermediate frequency signal to the baseband unit 2. The baseband unit 2 is further configured to perform second digital signal processing on the second intermediate frequency signal to obtain a second signal, and transmit the second signal to the core network equipment, wherein the second optical signal is a second baseband digital signal.

[0056] In this embodiment, a first radio frequency link signal processing unit 3 is added to the baseband device 1.

[0057] The baseband unit 2 performs digital signal processing in the downlink, including encoding and modulation, and outputs the corresponding first intermediate frequency (IF) signal to the first radio frequency (RF) link signal processing unit 3. The IF signal output by the baseband unit 2 is converted into the corresponding first optical signal by the first RF link signal processing unit 3 and then sent to each coverage amplification device 8.

[0058] The first radio frequency link signal processing unit 3 in the uplink converts the second optical signal from the coverage amplification device 8 into a corresponding second intermediate frequency signal. The baseband unit 2 in the uplink performs digital signal processing, including decoding and demodulation, to restore the second intermediate frequency signal to the corresponding second signal, and then interfaces with the core network to transmit the second signal to the core network equipment.

[0059] In one specific implementation, such as Figure 2 As shown, the first radio frequency link signal processing unit 3 includes a first processing intermediate module 4 and a first radio frequency digital electro-optic conversion and distribution module 5.

[0060] The first processing intermediate module 4 is used for duplex selection, converting the first intermediate frequency signal from the baseband unit 2 into a first radio frequency signal, amplifying the first radio frequency signal, and outputting the amplified first radio frequency signal to the first radio frequency digital electro-optical conversion and distribution module 5. The first radio frequency digital electro-optical conversion and distribution module 5 is used to convert the amplified first radio frequency signal into a first optical signal and transmit the first optical signal to each coverage amplification device 8.

[0061] The first radio frequency digital electro-optic conversion and distribution module 5 is also used to convert the second optical signal from each coverage amplification device 8 into a second radio frequency signal, and output the second radio frequency signal to the first processing intermediate module 4. The first processing intermediate module is also used to amplify the second radio frequency signal, convert the amplified second radio frequency signal into a second intermediate frequency signal, and output the second intermediate frequency signal to the baseband unit 2.

[0062] Duplex selection refers to the selection and control of signal transmission duplex mode in a communication system to meet different communication needs and technical standards. Duplex modes are mainly divided into three types: full-duplex, half-duplex, and simplex.

[0063] Full-duplex definition: Allows simultaneous bidirectional communication, where data can be transmitted in both directions at the same time. Applications: Telephone communication, real-time video conferencing, etc. Advantages: Improves communication efficiency because both parties can send and receive information simultaneously.

[0064] Half-duplex definition: Allows bidirectional communication, but not simultaneous communication. The communicating parties alternately send and receive data. Applications: Walkie-talkies, radio communications, etc.

[0065] Advantages: Lower hardware cost and less bandwidth required compared to full-duplex.

[0066] Simplex definition: Allows only one-way communication; information can only be transmitted in one direction, and the other party can only receive, not send. Applications: Television broadcasting, public address systems. Advantages: Simple and easy to use, but lacks interactivity.

[0067] In this embodiment, the first intermediate processing module 4 mainly performs duplex selection in the downlink, converts the first intermediate frequency signal into a first radio frequency signal, and performs signal amplification processing. The first radio frequency digital electro-optic conversion and distribution module 5 mainly converts the first radio frequency signal into the corresponding first optical signal in the downlink.

[0068] The first radio frequency digital electro-optical conversion and distribution module 5 in the uplink converts the second optical signal from the coverage amplification device 8 into a corresponding second radio frequency signal. The first processing intermediate module 4 in the uplink amplifies the second radio frequency signal, converts it into a corresponding second intermediate frequency signal, and outputs it to the baseband unit 2.

[0069] In one specific implementation, such as Figure 1 and Figure 2As shown, the baseband device 1 is provided with at least one first optical port 6, and each passive optical splitter 7 corresponds to one first optical port 6. Figure 2 In this configuration, two 1:8 passive optical splitters 71 are used. The baseband device 1 has four first optical ports 6, two of which are in use and the other two are in standby mode. One of the first optical ports 6 in use corresponds to one 1:8 passive optical splitter 71, and the other first optical port 6 in use corresponds to the other 1:8 passive optical splitter 71. The first optical ports 6 are used to send first optical signals to the corresponding passive optical splitter 7 and to receive second optical signals from the corresponding passive optical splitter 7.

[0070] In this embodiment, the first intermediate frequency signal output by the baseband unit 1 is converted into a corresponding first optical signal by the first radio frequency link signal processing unit 3, and then the first optical signal is output to the first optical port 6. It is sent to the corresponding passive optical splitter 7 through the first optical port 6, and the second optical signal from the corresponding passive optical splitter 7 is received through the first optical port 6.

[0071] In one specific implementation, such as Figure 2 As shown, the coverage amplification device 8 includes a second radio frequency link signal processing unit 10 and an antenna 13.

[0072] The second radio frequency link signal processing unit 10 is used to convert the first optical signal from the baseband device 1 into a first radio frequency signal, and output the first radio frequency signal to the antenna 13. The antenna 13 is used to radiate the first radio frequency signal, wherein the first optical signal is a first baseband digital signal.

[0073] Antenna 13 is also used to receive a second radio frequency signal and output the second radio frequency signal to the second radio frequency link signal processing unit 10. The second radio frequency link signal processing unit 10 is also used to convert the second radio frequency signal into a second optical signal and send the second optical signal back to the baseband device 1, wherein the second optical signal is a second baseband digital signal.

[0074] In this embodiment, a second radio frequency link signal processing unit 10 is added to the coverage amplification device 8.

[0075] The function of the second radio frequency link signal processing unit 10 in the downlink is to convert the first optical signal into the corresponding first radio frequency signal and output it to the antenna 13 for coverage.

[0076] In the uplink, each second radio frequency signal spatially coupled from the antenna 13 is converted into a corresponding second optical signal by the second radio frequency link signal processing unit 10 and then transmitted back to the baseband device 1.

[0077] In one specific implementation, such as Figure 2As shown, the second radio frequency link signal processing unit 10 includes a second radio frequency digital electro-optic conversion and distribution module 11 and a second processing intermediate module 12.

[0078] The second radio frequency digital electro-optical conversion and distribution module 11 is used to convert the first optical signal from the baseband device 1 into a first radio frequency signal, and output the first radio frequency signal to the second processing intermediate module 12. The second processing intermediate module 12 is used to perform duplex selection, amplify the first radio frequency signal, and output the amplified first radio frequency signal to the antenna 13. The antenna 13 radiates the amplified first radio frequency signal.

[0079] The second processing intermediate module 12 is further configured to filter the received second radio frequency signal and output the filtered second radio frequency signal to the second radio frequency digital electro-optical conversion and distribution module 11. The second radio frequency digital electro-optical conversion and distribution module 11 is further configured to convert the filtered second radio frequency signal into a second optical signal and transmit the second optical signal back to the baseband device 1.

[0080] In this embodiment, the second radio frequency digital electro-optic conversion and distribution module 11 in the downlink converts the received first optical signal into a corresponding first radio frequency signal. The second processing intermediate module 12 in the downlink amplifies the first radio frequency signal and performs downlink signal duplex selection, and then the antenna 13 radiates the amplified first radio frequency signal.

[0081] The second processing intermediate module 12 in the uplink performs filtering and duplex selection on the second radio frequency signal received by the antenna 13. The second radio frequency digital electro-optic conversion and distribution module 11 in the uplink converts the filtered second radio frequency signal into the corresponding second optical signal and then sends it back to the baseband device 1.

[0082] In one specific implementation, such as Figure 1 and Figure 2 As shown, the coverage amplification device 8 is equipped with a second optical port 9, and multiple coverage amplification devices 8 correspond to one passive optical splitter 7. Figure 2 In this configuration, eight coverage amplification devices 8 correspond to one 1:8 passive optical splitter 71. The second optical port 9 is used to receive the first optical signal from the corresponding passive optical splitter 7 and to send the second optical signal to the corresponding passive optical splitter 7.

[0083] In this embodiment, the first optical signal is input to the second optical port 9 of the coverage amplification device 8 through the passive optical splitter 7, and the first optical signal from the passive optical splitter 7 is received through the second optical port 9; the second radio frequency signal received by the antenna 13 is converted into the corresponding second optical signal by the second radio frequency link signal processing unit 10, and the second optical signal is output to the second optical port 9 and sent to the corresponding passive optical splitter 7 through the second optical port 9.

[0084] In one specific implementation, the baseband device 1 is placed in the central office room or a nearby community office. The coverage amplifier 8 is placed in the indoor area to be covered by the network, and has no testing ports; it is plug-and-play.

[0085] A central office (also known as a local exchange or exchange room) is a dedicated equipment room in a telecommunications network set up to enable telephone or data communication. Its main function is to centrally house telephone switching equipment, data switching equipment, and other communication equipment. A community equipment room is a room specifically used to house information technology equipment such as servers and network devices. It provides independent power supply, ventilation, temperature control, and security facilities to ensure the normal operation of information communication facilities in the residential community.

[0086] Baseband device 1 is powered by the central equipment room. To ensure the safety and stability of the equipment, baseband device 1 needs to be placed in the nearest operator's equipment room.

[0087] To ensure safety, the coverage amplifier 8 uses a localized power source instead of a centralized power supply. The coverage amplifier 8 primarily uses radio frequency amplification and can be designed as a compact module suitable for indoor placement. It also lacks any adjustment ports, allowing for plug-and-play operation and further enhancing the device's safety.

[0088] In this embodiment, the existing integrated small base station is split into a baseband device and a coverage amplification device. The baseband device and the coverage amplification device are connected through transmission optical cables, passive optical splitters and single-core drop optical cables to achieve distributed networking. Applying this new networking method to the front-end market can maximize user acceptance, provide the best network service at the lowest possible cost, and improve users' network experience.

[0089] The use of the distributed base station described in this utility model to achieve home network coverage has the following effects:

[0090] High user acceptance: Single-core drop fiber optic cable installation can significantly reduce the difficulty of home installation. It can be routed through pre-installed conduits, minimizing or eliminating impact on interior design, making it ideal for coverage in ordinary residential areas, luxurious villas, and ground-floor commercial spaces. Furthermore, single-core drop fiber optic cable offers shape advantages compared to network cables, feeder cables, and optical cables; specifically, it is approximately 1mm thick and 2mm wide.

[0091] Low deployment cost: Compared to traditional feeder coverage at 5.9 yuan / meter, composite optical cable at 2 yuan / meter, ordinary optical cable at 0.8 yuan / meter (12 cores), and network cable at 1.25 yuan / meter, single-core drop optical cable has a huge price advantage, saving a lot of costs; transmission between baseband equipment and passive optical splitter can be completed with a single two-core or four-core optical cable, and transmission between passive optical splitter and coverage amplification equipment is carried out with single-core drop optical cable, maximizing the savings in the cost of laying cables at the end.

[0092] High flexibility: Single-core drop fiber optic cable has an access distance of up to 5km, which is more flexible than network cable, feeder cable or composite fiber optic cable with an access distance of up to 100-200 meters, making it more suitable for network coverage in multiple small scenarios.

[0093] Strong Security: Compared to in-home full-cell base stations, baseband equipment can be centrally located in a data center, making it easier to manage and reducing the risk of equipment damage or loss due to environmental factors or customer issues. Furthermore, data transmission between the baseband equipment and the coverage amplification equipment does not use TCP / IP; instead, it uses a self-developed protocol, effectively preventing malicious attacks on the baseband equipment and operator systems via the coverage amplification equipment. The connection between the baseband equipment and the coverage amplification equipment uses a combination of transmission fiber optic cable, passive optical splitter, and single-core drop cable, eliminating the need for an external power supply and further enhancing security. This is a feature not found in typical extended small base stations, integrated base stations, or enterprise-grade picocells.

[0094] The distributed base station provided in this embodiment of the utility model is based on low-cost, home-access socialized small base station technology. It adopts a distributed supplementary point scheme, utilizes existing broadband network access routes, and achieves home network coverage through drop fiber optic cable transmission channels. It accurately delivers the high-speed, high-capacity capabilities of 4G / 5G to the areas to be covered by the home network (i.e., the areas where blind spots or complaining users are located). It can effectively solve the indoor network coverage problem in application scenarios such as small and medium-sized shopping malls, office buildings, villas, and ground-floor shops. It is convenient to use, effective, and low-cost, and can achieve good indoor coverage. It has unique advantages in terms of comprehensive balance in terms of design architecture, data security, cost control, deployment difficulty, product effect, and user acceptance.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A distributed base station, characterized by, The application relates to a baseband device, at least one passive optical splitter and a plurality of coverage amplification devices; the baseband device is connected with each passive optical splitter through a transmission optical cable; each passive optical splitter is connected with a plurality of coverage amplification devices through a plurality of single-core wire optical cables; the baseband device is used for carrying out baseband processing on a first signal from a core network device to obtain a first baseband digital signal, and transmitting the first baseband digital signal to each coverage amplification device through the transmission optical cable, the passive optical splitter and the single-core wire optical cable in sequence; the coverage amplification device is used for radiating the first baseband digital signal from the baseband device, and transmitting a second baseband digital signal obtained by radiating to the baseband device through the single-core wire optical cable, the passive optical splitter and the transmission optical cable in sequence. The baseband device is further used for carrying out restoration processing on the second baseband digital signal transmitted by each coverage amplification device to obtain a second signal, and transmitting the second signal to the core network device. The baseband device comprises a baseband unit and a first radio frequency link signal processing unit.

2. The distributed base station of claim 1, wherein, The baseband unit is used for carrying out first digital signal processing on the first signal from the core network device to obtain a first intermediate frequency signal, and outputting the first intermediate frequency signal to the first radio frequency link signal processing unit; the first radio frequency link signal processing unit is used for converting the first intermediate frequency signal into a first optical signal, and transmitting the first optical signal to each coverage amplification device, wherein the first optical signal is the first baseband digital signal. The first radio frequency link signal processing unit is further used for converting a second optical signal transmitted by each coverage amplification device into a second intermediate frequency signal, and outputting the second intermediate frequency signal to the baseband unit; the baseband unit is further used for carrying out second digital signal processing on the second intermediate frequency signal to obtain a second signal, and transmitting the second signal to the core network device, wherein the second optical signal is the second baseband digital signal. The first radio frequency link signal processing unit comprises a first processing intermediate module and a first radio frequency digital electric-optical conversion distribution module.

3. The distributed base station of claim 2, wherein, The first processing intermediate module is used for carrying out duplex selection, converting the first intermediate frequency signal from the baseband unit into a first radio frequency signal, amplifying the first radio frequency signal, and outputting the amplified first radio frequency signal to the first radio frequency digital electric-optical conversion distribution module; the first radio frequency digital electric-optical conversion distribution module is used for converting the amplified first radio frequency signal into a first optical signal, and transmitting the first optical signal to each coverage amplification device. The first radio frequency digital electric-optical conversion distribution module is further used for converting a second optical signal from each coverage amplification device into a second radio frequency signal, and outputting the second radio frequency signal to the first processing intermediate module; the first processing intermediate module is further used for amplifying the second radio frequency signal, converting the amplified second radio frequency signal into a second intermediate frequency signal, and outputting the second intermediate frequency signal to the baseband unit. ​ 4. The distributed base station of claim 2, wherein, The baseband device is provided with at least one first optical port, and each passive optical splitter corresponds to one first optical port; the first optical port is used for transmitting a first optical signal to the corresponding passive optical splitter and receiving a second optical signal from the corresponding passive optical splitter.

5. The distributed base station of claim 1, wherein, The coverage amplification device comprises a second radio frequency link signal processing unit and an antenna. The second radio frequency link signal processing unit is used for converting the first optical signal from the baseband device into a first radio frequency signal and outputting the first radio frequency signal to the antenna. The antenna is used for radiating the first radio frequency signal, wherein the first optical signal is the first baseband digital signal. The antenna is also used for receiving a second radio frequency signal and outputting the second radio frequency signal to the second radio frequency link signal processing unit; the second radio frequency link signal processing unit is also used for converting the second radio frequency signal into a second optical signal and feeding back the second optical signal to the baseband device, wherein the second optical signal is the second baseband digital signal.

6. The distributed base station of claim 5, wherein, The second radio frequency link signal processing unit comprises a second radio frequency digital electro-optical conversion distribution module and a second processing intermediate module. The second radio frequency digital electro-optical conversion distribution module is used for converting the first optical signal from the baseband device into a first radio frequency signal and outputting the first radio frequency signal to the second processing intermediate module; the second processing intermediate module is used for selecting duplex and amplifying the first radio frequency signal and outputting the amplified first radio frequency signal to the antenna; and the antenna radiates the amplified first radio frequency signal. The second processing intermediate module is also used for filtering the received second radio frequency signal and outputting the filtered second radio frequency signal to the second radio frequency digital electro-optical conversion distribution module; and the second radio frequency digital electro-optical conversion distribution module is also used for converting the filtered second radio frequency signal into a second optical signal and feeding back the second optical signal to the baseband device.

7. The distributed base station of claim 5, wherein, The coverage amplification device is provided with a second optical port, and a plurality of coverage amplification devices correspond to one passive optical splitter; the second optical port is used for receiving a first optical signal from the corresponding passive optical splitter and transmitting a second optical signal to the corresponding passive optical splitter.

8. The distributed base station of any of claims 1-7, wherein, The baseband device is placed in a local room or a nearby cell room; the coverage amplification device is placed in an indoor area to be covered by the network, and has no any test port and is plug-and-play.

9. The distributed base station of any of claims 1-7, wherein, The transmission optical cable adopts a two-core optical cable or a four-core optical cable.

10. The distributed base station of any of claims 1-7, wherein, The number ratio of the baseband device to the coverage amplification device is greater than or equal to 1 / 16 and less than or equal to 1 / 2.

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