POI Device and Wireless Coverage System

Abstract

The present invention relates to a POI device and a wireless coverage system. The POI device includes a carrier interface unit, a first combiner, a second combiner, a first coaxial cable, a second coaxial cable, a phase bridge, and an antenna feeder interface unit. The number of target ports corresponding to the same target signal source in the carrier interface unit is two. The first coaxial cable is the same as the second coaxial cable. The first combiner and the second combiner are combiners with the same target signal path. The input ports corresponding to the target signal paths of the first combiner and the second combiner are respectively connected to the respective target ports of the carrier interface unit. The output port of the first combiner is connected to the first input port of the phase bridge through the first coaxial cable. The output port of the second combiner is connected to the second input port of the phase bridge through the second coaxial cable. The output end of the phase bridge is connected to the antenna feeder interface unit. The realization of capacity expansion and speed increase no longer requires an increase in the number of antenna feeders, saving rooftop resources and greatly reducing the cost of capacity expansion and speed increase.

Description

Technical Field

[0001] The present invention relates to the field of communication technologies, and particularly to a POI device and a wireless coverage system. Background Art

[0002] With the development of mobile communication technologies, mobile communication has entered the 5G era. The number of communication users is increasing year by year, and communication content is diversified, posing higher requirements for communication rate and capacity. To improve the rate and increase the capacity, communication systems (from 2G, 4G to 5G) are iterated year by year, and the application of MIMO (Multiple-Input Multiple-Output) technology is a key means to increase capacity and speed. Similarly, there is also the Massive MIMO large-scale array antenna technology. In practical applications, MIMO technology realizes capacity expansion and speed increase by increasing the number of antennas (that is, increasing the antenna feeder to expand capacity and speed). For example, a BTS (Base Transceiver Station) is used in conjunction with a common POI (Point Of Interface) device. The traditional way to expand capacity and speed is to increase the number of antenna feeders. However, due to the limitations of its own structure, it is difficult for the POI device to achieve capacity expansion and speed increase alone. However, in the implementation process, the inventor found that there is a problem of high cost in the traditional capacity expansion and speed increase method. Summary of the Invention

[0003] Based on this, it is necessary to provide a POI device that can significantly reduce the cost of capacity expansion and speed increase, and a wireless coverage system, aiming at the problems existing in the traditional capacity expansion and speed increase method.

[0004] To achieve the above object, the embodiments of the present invention provide the following technical solutions:

[0005] On the one hand, the embodiments of the present invention provide a POI device, including a carrier interface unit, a first combiner, a second combiner, a first coaxial cable, a second coaxial cable, a phase bridge, and an antenna feeder interface unit; the number of target ports corresponding to the same target signal source in the carrier interface unit is two, the first coaxial cable is the same as the second coaxial cable, and the first combiner and the second combiner are combiners with the same target signal path;

[0006] The input ports corresponding to the target signal paths of the first combiner and the second combiner are respectively connected to the respective target ports of the carrier interface unit. The output port of the first combiner is connected to the first input port of the phase bridge through the first coaxial cable, and the output port of the second combiner is connected to the second input port of the phase bridge through the second coaxial cable;

[0007] The first output end of the phase bridge is connected to the downlink port of the antenna feeder interface unit, and the second output end of the phase bridge is connected to the uplink port of the antenna feeder interface unit.

[0008] In one embodiment, the number of target signal sources accessed by the carrier interface unit is one. The input port corresponding to the target signal path of the first combiner is connected to one target port of the carrier interface unit, and the input port corresponding to the target signal path of the second combiner is connected to another target port of the carrier interface unit.

[0009] In one embodiment, the target signal source is a 4G system or a 5G system.

[0010] On the other hand, a wireless coverage system is further provided, including a BTS signal source, at least one antenna feeder, and at least one of the above-mentioned POI devices;

[0011] Each output port of the BTS signal source is respectively connected to each carrier port of the carrier interface unit in the POI device, and the output port corresponding to the target signal source of the BTS signal source is correspondingly connected to each target port of the carrier interface unit. The antenna feeder interface unit of the POI device is connected to the antenna feeder.

[0012] In one embodiment, there are two antenna feeders and two POI devices. The antenna feeder interface units of each POI device are respectively connected to each antenna feeder in a one-to-one correspondence, and each carrier port of the carrier interface unit in each POI device is respectively connected to each output port of the BTS signal source.

[0013] In one embodiment, the antenna feeder is a leaky cable.

[0014] In one embodiment, the BTS signal source includes any two or more combinations of a Telecom CDMA800 system, a China Unicom GSM900 system, a Telecom LTE1800 system, a Mobile 5G system, a Telecom 5G system, and a China Unicom 5G system.

[0015] In one embodiment, the BTS signal source includes any two or more combinations of a China Unicom FDD-LTE1.8 system, a Telecom FDD-LTE2.1 system, a China Unicom TD-LTE2.3 system, a Mobile 5G system, a Telecom 5G system, and a China Unicom 5G system.

[0016] In one embodiment, the BTS signal source includes any two or more combinations of a Mobile DCS1800 system, a Mobile TD-LTE (F&A) system, a Telecom TD-LTE2.3 system, a Mobile 5G system, a Telecom 5G system, and a China Unicom 5G system.

[0017] In one embodiment, the BTS signal source includes any two or more combinations of a Mobile GSM900 system, a China Unicom WCDMA system, a Mobile TD-LTE (E) system, a Mobile 5G system, a Telecom 5G system, and a China Unicom 5G system.

[0018] One of the above technical solutions has the following advantages and beneficial effects:

[0019] For the above POI device and wireless coverage system, by using a first combiner, a second combiner, a first coaxial cable, a second coaxial cable, and a phase bridge to provide a signal transmission path inside the device, and jointly forming the main structure of the POI device with the carrier interface unit and the antenna feeder interface unit. The use of the first combiner, the second combiner, the first coaxial cable, the second coaxial cable, and the phase bridge makes the difference between the introduced uncontrollable absolute phases 0 degrees, and the phase difference is controlled by the phase bridge to be a fixed value, so that a single antenna feeder can achieve the MIMO function, achieving the effect of capacity expansion and speed increase. The realization of capacity expansion and speed increase no longer requires increasing the number of antenna feeders, saving roof resources, and achieving the purpose of greatly reducing the cost of capacity expansion and speed increase. Description of the Drawings

[0020] Figure 1 It is a schematic diagram of the application scenario of a traditional POI device;

[0021] Figure 2 It is a schematic diagram of the structure of the POI device of the present application in an embodiment;

[0022] Figure 3 It is a schematic diagram of the structure of a wireless coverage system in an embodiment;

[0023] Figure 4 It is a schematic diagram of the structure of a wireless coverage system in another embodiment. Detailed Embodiments

[0024] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0025] It should be noted that unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0026] Entering the 5G era, the communication bandwidth is larger and the rate is higher, and the requirement for interference avoidance between systems is also higher. At present, the mainstream communication systems in the mobile communication network mainly include China Telecom's CDMA800, LTE1800, FDD-LTE2.1 and TD-LTE2.3, China Unicom's GSM900, FDD-LTE1.8, TD-LTE2.3 and WCDMA, China Mobile's DCS1800, TD-LTE (F&A), GSM900 and TD-LTE (E), as well as the 5G systems of the three major operators, etc. POI devices are applied to the multi-network combination and shared construction of different operators. Traditional POI (i.e., Point Of Interface, multi-system access platform) devices are already difficult to meet the current multi-system access requirements. For example Figure 1 The figure shows a schematic diagram of an application scenario of a traditional POI device, which can be a subway tunnel, a high-speed rail tunnel or other tunnel scenarios, and is covered by leaky cables. In the tunnel scenario, most of the provided space only allows the laying of 2 leaky cables for 2T2R coverage, and the theoretical rate is 2 times that of single leaky cable coverage, which is much less than 1 Gbps; at the same time, after the coverage structure is built, it is basically not possible to carry out construction again, which makes it difficult to increase the rate by relying on adding antennas in the original coverage. For example Figure 1 As shown in the figure, taking the 5G system as an example, the two ports of a 5G BTS (Base Transceiver Station) are respectively connected to 2 traditional POI devices, covering antenna 1 and antenna 2 respectively. One 5G BTS plus one antenna is 1T1R, and two 5G BTSs and two antennas together form 2T2R. Figure 1 The ordinary POI in the figure, that is, the traditional POI device, and the ports shown on the left of its 5G port are respectively used to access other communication systems.

[0027] In the process of implementing the present invention, the inventor found that in the traditional way of increasing antennas to increase the rate and expand the capacity, increasing the number of antennas will cause a substantial increase in cost. For example, if the number of antennas is doubled, the investment will also double. For example, to increase the antennas on a subway line, the cost of communication facilities required reaches the tens of millions level. And the traditional POI device cannot provide support for low-cost capacity expansion and speed increase, making the traditional capacity expansion and speed increase methods difficult to apply in more and more high-rate and large-capacity scenarios. In view of the defect of relatively high cost of capacity expansion and speed increase existing in the actual application of traditional POI devices, the following technical solutions are provided in this application:

[0028] Please refer to Figure 2, in one embodiment, a POI device 100 is provided, including a carrier interface unit 11, a first combiner 12, a second combiner 13, a first coaxial cable 14, a second coaxial cable 15, a phase bridge 16, and an antenna feeder interface unit 17. The number of target ports corresponding to the same target signal source in the carrier interface unit 11 is two. The first coaxial cable 14 is the same as the second coaxial cable 15. The first combiner 12 and the second combiner 13 are combiners with the same target signal path. The input ports corresponding to the target signal paths of the first combiner 12 and the second combiner 13 are respectively connected to the respective target ports of the carrier interface unit 11 (such as the ports indicated by the hollow circles in Figure 2 ). The output port of the first combiner 12 is connected to the first input port of the phase bridge 16 through the first coaxial cable 14. The output port of the second combiner 13 is connected to the second input port of the phase bridge 16 through the second coaxial cable 15. The first output terminal of the phase bridge 16 is connected to the downlink port ANT1 of the antenna feeder interface unit 17, and the second output terminal of the phase bridge 16 is connected to the uplink port ANT2 of the antenna feeder interface unit 17.

[0029] It can be understood that the carrier interface unit 11 is an existing signal port unit in the art, which may include several signal ports. For example, the number of signal ports is equal to the number of systems to be accessed (such as one port for accessing one system), or the number of signal ports is greater than the number of systems to be accessed (such as setting redundant ports for expanding the access of other systems). The specific number of signal ports included in the carrier interface unit 11 can be determined according to the number of systems to be accessed in the actual application scenario, as long as it can meet the access requirements of different systems, and two identical ports (i.e., target ports) are set for the same target signal source. The target signal source can be any one of the mainstream systems in the above-mentioned mobile communication network, or more than two, and the specific number can be selected according to the capacity and rate requirements of each system in the actual application.

[0030] The first combiner 12 and the second combiner 13 are also dedicated or general combiners existing in the art, which are used to provide the function of combining multi-system signals accessed and are connected to the phase bridge 16. The first combiner 12 and the second combiner 13 have the same target signal path, that is, in the first combiner 12 and the second combiner 13, the input ports and their transmission paths for accessing the signals of the same target source that needs to be expanded and speeded up are the same: for the same target source, the two input ports respectively accessing the first combiner 12 and the second combiner 13 have the same access frequency band, path, electrical length and phase jump, forming a symmetric combining unit. It can be understood that there are many nodes, electrical lengths and other positions in the combiner, so the phase is not fixed, showing a sawtooth cycle, and a phase jump will also occur at the node, such as the phase at the short-circuit point will jump by 180 degrees. By keeping the electrical length and the phase jump of the node between the first combiner 12 and the second combiner 13 consistent, the phase difference introduced by the combiner is a fixed value, such as 0 degrees.

[0031] The first in-phase cable 14 and the second in-phase cable 15 are the same, which means that the in-phase cables used have the same electrical length, and the phase jumps at positions such as joints and contact points are also the same, so that the phase difference introduced by the cable is a fixed value, for example, the fixed value of the phase difference is 0 degrees (the specific type selection of the in-phase cable can be determined according to the magnitude of the fixed phase difference formed by the combiner and the phase bridge 16). The phase bridge 16 and the antenna-feeder interface unit 17 are also orthogonal bridges and antenna-feeder interfaces existing in the art respectively. Among them, the phase bridge 16 can form a fixed phase difference, such as 90 degrees, 0 degrees or other fixed values. The phase bridge 16 is matched with the above-mentioned combiner and in-phase cable, so that the difference between the uncontrollable absolute phases introduced by each device is 0 degrees, realizing controllable phase difference of the POI, and thus making the signals in the antenna-feeder controllable.

[0032] In this way, two identical target ports are set on the carrier interface unit 11 for the same target source. Matching the setting method of the symmetric combining unit, the MIMO mode can be realized under a single antenna-feeder (without modifying the already built antenna-feeder). In practical applications, users can set the phase of the BTS source with reference to the pre-determined phase requirements of the source. For example, if the phase adopted by the BTS source at a certain frequency point is 0 degrees, then signals of 0 degrees and 90 degrees will appear in the antenna-feeder, and the amplitude of the signals increases to √2 times that of the above traditional coverage method. Similar polarization characteristics appear at the user end: when one signal is at 0 point, the other signal is received at full amplitude, so there will be no 0 point phenomenon, achieving the effects of signal enhancement, bandwidth increase and rate capacity improvement.

[0033] The above POI device 100 provides a signal transmission path inside the device by using a first combiner 12, a second combiner 13, a first coaxial cable 14, a second coaxial cable 15 and a phase bridge 16, and together with the carrier interface unit 11 and the antenna feeder interface unit 17, forms the main structure of the POI device. By using the first combiner 12, the second combiner 13, the first coaxial cable 14, the second coaxial cable 15 and the phase bridge 16, the difference between the introduced uncontrollable absolute phases is 0 degree, and the phase difference is controlled by the phase bridge 16 to be a fixed value, so that the MIMO function can be realized by a single antenna feeder, achieving the effect of capacity expansion and speed increase. The realization of capacity expansion and speed increase no longer requires increasing the number of antenna feeders. While saving the rooftop resources, the cost can be basically kept unchanged, achieving the purpose of greatly reducing the cost of capacity expansion and speed increase.

[0034] To better understand the performance of the above POI device 100, the following principle description is provided: In actual applied research, the inventor found that traditional POI devices do not have the ability to control phases, their absolute phases are random, and cycle between -180 degrees and +180 degrees, and cannot be utilized. However, through the above POI device 100, the uncontrollable absolute phases can be changed into controllable relative phases, forming a fixed phase difference. In traditional POI devices, for a cable or any device with an arbitrary length, its absolute phase is serrated, and the serration density is greater for a longer length; the phase jumps at mismatched positions, such as a short-circuit phase flipping by 180 degrees; one of the variables of the phase is the frequency, so the common phase shifters have a narrow bandwidth, and the slanted lines of the sawtooth wave are approximated as straight lines within a very narrow range.

[0035] The above POI device 100 belongs to a bridge-phase POI. By means of a symmetric combiner unit, the phase transmission and phase mutation are kept consistent; by means of coaxial cables, the phases introduced at positions such as cables, connectors and contact points are kept the same; by means of the phase bridge 16, using the orthogonal characteristics of the phase bridge 16, the sawtooth waveforms introduced by the electrical lengths are cancelled, forming a fixed phase difference, which can usually take a fixed phase difference of 90 degrees, and can be specifically selected according to the needs of the actual application scenario.

[0036] In one embodiment, the number of target signal sources accessed by the carrier interface unit 11 is one. The input port corresponding to the target signal path of the first combiner 12 is connected to one target port of the carrier interface unit 11. The input port corresponding to the target signal path of the second combiner 13 is connected to another target port of the carrier interface unit 11.

[0037] It can be understood that in some application scenarios, when the number of systems that require high-speed and large-capacity in each of the systems connected to the POI device 100 is one, two target ports are set in each carrier port of the carrier interface unit 11 of the POI device 100 for respectively connecting to the carrier signals of the system that requires high-speed and large-capacity. The system that requires high-speed and large-capacity can be any one of the mainstream systems in the above-mentioned mobile communication network and can be selected according to the actual communication requirements in different scenarios.

[0038] Both the first combiner 12 and the second combiner 13 can be three-port combiners, four-port combiners, or combiners with four or more ports in the art, as long as they can meet the signal combining and transmission requirements of each connected system. The input port corresponding to the target signal path of the first combiner 12, that is, an input port for connecting to the signal of the target signal source, is connected to one of the target ports of the carrier interface unit 11. The input port corresponding to the target signal path of the second combiner 13, that is, an input port for connecting to the signal of the target signal source, is connected to the other target port of the carrier interface unit 11. The remaining input ports of the first combiner 12 and the second combiner 13 are respectively connected to other non-target ports of the carrier interface unit 11 to achieve the connection of other systems.

[0039] Through the above-mentioned carrier interface unit 11, first combiner 12, and second combiner 13, two ports are provided for the system that requires high-speed and large-capacity. Under the path constraints of the first combiner 12, second combiner 13, first coaxial cable 14, second coaxial cable 15, and phase bridge 16, these two ports can form MIMO coverage for the target signal source, achieving the effect of expanding the capacity and increasing the speed of the target signal source, and without increasing the number of the original antennas in the application scenario, greatly reducing the cost required for capacity expansion and speed increase.

[0040] In one embodiment, the target signal source is a 4G system or a 5G system. Optionally, in this embodiment, a system that requires high speed and large capacity can be a 4G system, such as, but not limited to, the 4G systems of China Mobile, the 4G systems of China Telecom, or the 4G systems of China Unicom. A system that requires high speed and large capacity can also be a 5G system, such as, but not limited to, the 5G systems of China Mobile, the 5G systems of China Telecom, or the 5G systems of China Unicom. Taking the system that requires high speed and large capacity being a 5G system as an example, for the POI device 100 of this embodiment, since the POI device 100 provides two ports for the 5G system, the carrier signals of the 5G system can be divided into two paths for access. During actual operation, the working mode of the POI device 100 is similar to the coverage mode of a dual-channel dual-polarized antenna. The symmetry of the first combiner 12 and the second combiner 13, in cooperation with the co-phase cable, makes the difference between the introduced uncontrollable absolute phases be 0 degrees. The phase bridge 16 controls the phase difference to be 90 degrees. Then, the performance of the entire coverage system is as follows: the phase difference is 90 degrees, and the isolation is greater than 30 dB, which can make the signals approximately incoherent.

[0041] Thus, by applying the above-mentioned POI device 100, the effect of capacity expansion and speed increase can be achieved without modifying the antenna feeder system. For example, in a tunnel scenario where the laying of the antenna feeder system is restricted in multiple ways, the main signal penetration point of the train is the window, and the height of the window is also suitable for arranging 2 leaky cables (i.e., antenna feeder systems). By using the above-mentioned POI device 100, only the traditional POI device needs to be replaced with the above-mentioned POI device 100, and by setting the phase difference for the BTS signal source, the effect of capacity expansion and speed increase can be achieved without increasing the number of leaky cables. In addition, in traditional POI applications, in order to resist interference, transmission and reception need to be separated, so 2 leaky cables can only achieve 1T1R coverage. By applying the above-mentioned POI device 100, since the phase difference becomes controllable, after the phase of the BTS signal source is set accordingly, the transmitted signal can be concentrated in a single leaky cable as the main transmission, and the other leaky cable is used for reception, achieving separation of transmission and reception to achieve the purpose of anti-interference. At the same time, the rate and capacity of a single leaky cable are much higher than the original 1T1R coverage.

[0042] In one embodiment, the above-mentioned POI device 100 further includes a housing for encapsulating the above-mentioned carrier interface unit 11, first combiner 12, second combiner 13, first co-phase cable 14, second co-phase cable 15, phase bridge 16, and antenna feeder interface unit 17 and other devices. It can be understood that the shape and material of the housing can be the same as or similar to those of the housing of traditional POI devices in the art, and can be specifically determined according to the requirements of encapsulation and fixation, protection, and signal shielding of each device, as long as reliable encapsulation of each device and installation and fixation of the carrier interface unit 11 and the antenna feeder interface unit 17 can be achieved.

[0043] Please refer to Figure 3, in one embodiment, a wireless coverage system 200 is further provided, which includes a BTS source 202, at least one antenna feeder 204, and at least one of the above-mentioned POI devices 100. Each output port of the BTS source 202 is respectively connected to each carrier port of the carrier interface unit 11 in the POI device 100, and the output port corresponding to the target source of the BTS source 202 is correspondingly connected to each target port of the carrier interface unit 11. The antenna feeder interface unit 17 of the POI device 100 is connected to the antenna feeder 204.

[0044] It can be understood that for the explanation of the POI device 100 in this embodiment, specifically, reference can be made to the specific explanations of the POI device 100 in the above-mentioned embodiments, and no further elaboration will be given here and in subsequent embodiments. The antenna feeder interface unit 17 of the POI device 100 includes a downlink port and an uplink port. The connection method between the downlink port and the uplink port and the antenna feeder 204 can be understood by analogy with the wiring method of the antenna feeder 204 in the traditional wireless coverage system in the art. Figure 3 The 5G port shown as the target port is only illustrative and not the only limitation on the type of the target port of the POI device 100 in actual applications.

[0045] By applying the above-mentioned POI device 100 and the wireless coverage system 200, the single antenna feeder 204 can achieve the MIMO function, achieving the effect of capacity expansion and speed increase. The realization of capacity expansion and speed increase no longer requires increasing the number of antenna feeders 204. While saving the rooftop resources, the cost can be basically kept unchanged, achieving the purpose of greatly reducing the cost of capacity expansion and speed increase.

[0046] Please refer to Figure 4 , in one embodiment, there are two antenna feeders 204. There are two POI devices 100. The antenna feeder interface units 17 of each POI device 100 are respectively connected to each antenna feeder 204 in one-to-one correspondence. Each carrier port of the carrier interface unit 11 in each POI device 100 is respectively connected to each output port of the BTS source 202.

[0047] It can be understood that in the foregoing embodiment, the wireless coverage system 200 can be a system covered by a single antenna feeder 204 or a system covered by multiple antenna feeders 204. Correspondingly, the number of POI devices 100 applied can be one or multiple, which can be specifically determined according to the number of antenna feeders 204 and the number of BTS sources 202 accessed. Figure 4 The 5G port shown as the target port is only illustrative and not the only limitation on the type of the target port of the POI device 100 in actual applications.

[0048] In this embodiment, the wireless coverage system 200 can be a system covered by dual antennas 204, and in practical applications, multiple identical wireless coverage systems 200 can be combined for use to achieve a larger range of wireless coverage. In the wireless coverage system 200, one of the antennas 204 is correspondingly connected to the antenna interface unit 17 of a POI device 100, and the other antenna 204 is correspondingly connected to the antenna interface unit 17 of another POI device 100 to achieve the access of the antenna 204. The respective carrier ports of the carrier interface units 11 of the two POI devices 100 are respectively connected to the corresponding output ports of the BTS source 202 according to the type of the system to be accessed, so as to achieve the access of each system.

[0049] In the wireless coverage system 200 with dual antennas 204 which is widely applied, by applying two of the above-mentioned POI devices 100, the effects of capacity expansion and speed increase under dual antennas 204 can be correspondingly achieved. Thus, MIMO can be realized on a single antenna 204, the antenna surface resources can be saved, the investment cost of upgrading and transformation can be greatly saved, and the purpose of anti-interference in the wireless coverage system 200 can also be effectively achieved.

[0050] In one embodiment, the antenna 204 is a leaky cable. It can be understood that in the above-mentioned embodiments, in different application scenarios, the type of the antenna 204 will be different. And in some application scenarios, such as tunnel scenarios, when using leaky cables for coverage, due to the limitation of space size, usually only 2 leaky cables can be laid to achieve 2T2R coverage. Therefore, in the wireless coverage system 200 where the antenna 204 is a leaky cable, for systems that need to achieve high speed and large capacity at low cost, they can all be realized by applying the above-mentioned POI device 100 to achieve the effect of low-cost capacity expansion and speed increase.

[0051] In one embodiment, the BTS source 202 includes any two or more combinations of a telecom CDMA800 system, a unicom GSM900 system, a telecom LTE1800 system, a mobile 5G system, a telecom 5G system, and a unicom 5G system.

[0052] It can be understood that in the above-mentioned wireless coverage system 200, the multi-systems included in the BTS source 202 can be any one or a combination of two or more of the telecom CDMA800 system, the unicom GSM900 system, and the telecom LTE1800 system in the field, combined with any one or a combination of two or more of the mobile 5G system, the telecom 5G system, and the unicom 5G system to form a multi-system source. Through the above multi-system combined access method, the non-interference falling between systems can be utilized to avoid inter-system interference in the actual application of the wireless coverage system 200.

[0053] In one embodiment, the BTS source 202 includes any two or more combinations of the China Unicom FDD-LTE 1.8 system, the China Telecom FDD-LTE 2.1 system, the China Unicom TD-LTE 2.3 system, the China Mobile 5G system, the China Telecom 5G system, and the China Unicom 5G system.

[0054] It can be understood that the BTS source can be multiple discrete BTS devices corresponding to multiple communication systems respectively, or a combined BTS system corresponding to multiple communication systems respectively. In the above wireless coverage system 200, the multiple systems included in the BTS source 202 can also be any one or a combination of two or more of the China Unicom FDD-LTE 1.8 system, the China Telecom FDD-LTE 2.1 system, and the China Unicom TD-LTE 2.3 system in the art, combined with any one or a combination of two or more of the China Mobile 5G system, the China Telecom 5G system, and the China Unicom 5G system to form a multi-system source. Through the above multi-system combined access method, the interference-free fall between systems can be utilized to avoid inter-system interference in the actual application of the wireless coverage system 200.

[0055] In one embodiment, the BTS source 202 includes any two or more combinations of the China Mobile DCS1800 system, the China Mobile TD-LTE (F&A) system, the China Telecom TD-LTE 2.3 system, the China Mobile 5G system, the China Telecom 5G system, and the China Unicom 5G system.

[0056] It can be understood that in the above wireless coverage system 200, the multiple systems included in the BTS source 202 can also be any one or a combination of two or more of the China Mobile DCS1800 system, the China Mobile TD-LTE (F&A) system, and the China Telecom TD-LTE 2.3 system in the art, combined with any one or a combination of two or more of the China Mobile 5G system, the China Telecom 5G system, and the China Unicom 5G system to form a multi-system source. Through the above multi-system combined access method, the interference-free fall between systems can be utilized to avoid inter-system interference in the actual application of the wireless coverage system 200.

[0057] In one embodiment, the BTS source 202 includes any two or more combinations of the China Mobile GSM900 system, the China Unicom WCDMA system, the China Mobile TD-LTE (E) system, the China Mobile 5G system, the China Telecom 5G system, and the China Unicom 5G system.

[0058] It can be understood that in the above wireless coverage system 200, the multi-system included in the BTS source 202 can also be any one or a combination of two or more of the mobile GSM900 system, Unicom WCDMA system, and mobile TD-LTE (E) system in the art, combined with any one or a combination of two or more of the mobile 5G system, Telecom 5G system, and Unicom 5G system to form a multi-system source. Through the above multi-system combined access method, the interference between systems in the actual application of the wireless coverage system 200 can be avoided by taking advantage of the non-interference fall between systems.

[0059] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0060] The above embodiments only represent several implementation manners of the present invention, and the description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A POI device, characterized in that, it includes a carrier interface unit, a first combiner, a second combiner, a first in-phase cable, a second in-phase cable, a phase bridge, and an antenna feeder interface unit; the number of target ports corresponding to the same target signal source in the carrier interface unit is two, the first in-phase cable is the same as the second in-phase cable, and the first combiner and the second combiner are combiners with the same target signal path; the input ports corresponding to the target signal paths of the first combiner and the second combiner are respectively connected to the respective target ports of the carrier interface unit, the output port of the first combiner is connected to the first input port of the phase bridge through the first in-phase cable, and the output port of the second combiner is connected to the second input port of the phase bridge through the second in-phase cable; the first output end of the phase bridge is connected to the downlink port of the antenna feeder interface unit, the second output end of the phase bridge is connected to the uplink port of the antenna feeder interface unit, and the antenna feeder interface unit is used to connect to an antenna feeder.

2. The POI device according to claim 1, characterized in that, the number of the target signal sources that the carrier interface unit is used to access is one, the input port corresponding to the target signal path of the first combiner is connected to one of the target ports of the carrier interface unit, and the input port corresponding to the target signal path of the second combiner is connected to the other target port of the carrier interface unit.

3. The POI device according to claim 2, characterized in that, the target signal source is a 4G system or a 5G system.

4. A wireless coverage system, characterized in that, it includes a BTS signal source, at least one antenna feeder, and at least one POI device according to any one of claims 1 to 3; each output port of the BTS signal source is respectively connected to each carrier port of the carrier interface unit in the POI device, and the output port corresponding to the target signal source of the BTS signal source is correspondingly connected to each target port of the carrier interface unit, and the antenna feeder interface unit of the POI device is connected to the antenna feeder.

5. The wireless coverage system according to claim 4, characterized in that, there are two antenna feeders, there are two POI devices, the antenna feeder interface units of each POI device are respectively and correspondingly connected to each antenna feeder, and each carrier port of the carrier interface unit in each POI device is respectively connected to each output port of the BTS signal source.

6. The wireless coverage system according to claim 4 or 5, characterized in that, the antenna feeder is a leaky cable.

7. The wireless coverage system according to claim 6, characterized in that, the BTS signal source includes any two or more combinations of a telecom CDMA800 system, a unicom GSM900 system, a telecom LTE1800 system, a mobile 5G system, a telecom 5G system, and a unicom 5G system.

8. The wireless coverage system according to claim 6, characterized in that, The BTS signal source includes any two or more combinations of China Unicom's FDD-LTE 1.8 GHz system, China Telecom's FDD-LTE 2.1 GHz system, China Unicom's TD-LTE 2.3 GHz system, China Mobile's 5G system, China Telecom's 5G system, and China Unicom's 5G system.

9. The wireless coverage system according to claim 6, wherein, the BTS signal source includes any two or more combinations of China Mobile's DCS 1800 system, China Mobile's TD-LTE F&A band system, China Telecom's TD-LTE 2.3 GHz system, China Mobile's 5G system, China Telecom's 5G system, and China Unicom's 5G system.

10. The wireless coverage system according to claim 6, wherein, the BTS signal source includes any two or more combinations of China Mobile's GSM 900 system, China Unicom's WCDMA system, China Mobile's TD-LTE E band system, China Mobile's 5G system, China Telecom's 5G system, and China Unicom's 5G system.

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