5G frequency-selecting unvarnished transmission POI combiner device

Abstract

The utility model relates to the technical field of POI combiners, in particular to a 5G frequency-selecting unvarnished transmission POI combiner device which comprises a POI combiner unit. Each POI combiner unit comprises more than two electric bridges, two multi-frequency combiners and more than two mechanical switches K; the electric bridges and the mechanical switches K are equal in number and are in one-to-one correspondence; the input end of each bridge is connected with signal sources with different frequencies, the two output ends of each bridge are electrically connected with the two input ends of the corresponding mechanical switch K respectively, and the two output ends of each mechanical switch K are electrically connected with the input ends of the two multi-frequency combiners respectively. A two-stage combining mode is adopted, a first-stage combiner is a bridge, balance of an input phase and a level can be conveniently controlled, and the unoccupied input end of the bridge is connected with a load; and the second-stage combiner is a multi-frequency combiner and can support switching of two modes of unvarnished transmission and combined transmission, so that various types of equipment are avoided, and the purchase cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of POI combiner technology, specifically a 5G frequency-selective transparent POI combiner device. Background Technology

[0002] 5G network coverage in subway tunnels typically uses leaky coaxial cable + RRU (Remote Local Unit). The transmission distance of 5G signals over leaky coaxial cable is related to the frequency and power of the signal source. The access frequency range of RRU signal sources is from 700MHz to 3700MHz, and the power range is from 20W to 100W. This results in inconsistent transmission distances for 5G RRU signal sources of different standards. Currently, the design concept for the spacing between tunnel coverage sites is to set the spacing based on the maximum allowable loss of high-frequency 4 / 5G signal sources within the leaky cable transmission range. Other frequency signal sources are also set up with sites according to this spacing, which results in a waste of low-frequency, high-power 4 / 5G signal sources. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a 5G frequency-selective transparent transmission POI combiner device, which can flexibly set the frequency to be transmitted according to actual needs, so as to solve the above problems.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A 5G frequency-selective transparent transmission POI combiner device includes POI combiner units; each POI combiner unit includes two or more bridges, two multi-frequency combiners, and two or more mechanical switches K; the number of bridges is equal to the number of mechanical switches K and corresponds one-to-one; the input terminal of each bridge is connected to a signal source of a different frequency, the two output terminals of each bridge are electrically connected to the two input terminals of the corresponding mechanical switch K, and the two output terminals of each mechanical switch K are electrically connected to the input terminals of the two multi-frequency combiners.

[0006] Preferably, two adjacent POI combiner units are electrically connected via a leaky cable.

[0007] Preferably, the number of the electrical bridge and the number of mechanical switches K are both seven.

[0008] Preferably, the mechanical switch K includes a first terminal, a second terminal, a third terminal, and a fourth terminal. The first and second terminals serve as the two input terminals of the mechanical switch K, and the third and fourth terminals serve as the two output terminals of the mechanical switch K. The terminals of the mechanical switch K are connected by jumpers to realize two switching settings: combined transmission and transparent transmission.

[0009] Preferably, the frequency range of the signal source is between 700MHz and 3700MHz.

[0010] Preferably, the unused input terminal of the bridge is connected to a load.

[0011] The beneficial effects of this utility model are:

[0012] This utility model provides a 5G frequency-selective transparent transmission POI combiner device, including POI combiner units. Each POI combiner unit includes two or more bridges, two multi-frequency combiners, and two or more mechanical switches K. The number of bridges is equal to and corresponds one-to-one with the number of mechanical switches K. The input terminal of each bridge is connected to a signal source of a different frequency. The two output terminals of each bridge are electrically connected to the two input terminals of the corresponding mechanical switch K, and the two output terminals of each mechanical switch K are electrically connected to the input terminals of the two multi-frequency combiners. A two-stage combining method is adopted. The first-stage combiner is a bridge, which facilitates the control of input phase and level balance. The unused input terminals of the bridge are connected to the load. The second-stage combiner is a multi-frequency combiner, which can support switching between transparent transmission and combined transmission modes, avoiding the need for diverse equipment types and reducing procurement costs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a 5G frequency-selective transparent transmission POI combiner device according to this utility model;

[0014] Figure 2 This is a schematic diagram of the working principle of the transparent transmission mode of this utility model;

[0015] Figure 3 This is a schematic diagram of the working principle of the combined transmission mode of this utility model;

[0016] Figure 4 This is a schematic diagram of the transparent transmission switch mode of this utility model;

[0017] Figure 5 This is a diagram of the switching mode of the combined transmission mode of this utility model;

[0018] Figure 6 This is a diagram showing the transmission connection of different frequencies of this utility model. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0020] See Figures 1 to 6This utility model provides a 5G frequency-selective transparent transmission POI combiner device, including POI combiner units; each POI combiner unit includes two or more bridges, two multi-frequency combiners and two or more mechanical switches K; the number of bridges is equal to the number of mechanical switches K and corresponds one-to-one; specifically, the number of bridges and the number of mechanical switches K are both seven.

[0021] One input of each bridge is connected to a signal source of a different frequency, with the frequency range between 700MHz and 3700MHz. In this embodiment, these are: an NR 700MHz signal source, an FDD 1.8GHz signal source, a TDD 1.9GHz signal source, an NR 2.1GHz signal source, a TDD 2.3GHz signal source, an NR 2.6GHz signal source, and an NR 3.5GHz signal source. The other input of each bridge is connected to a load.

[0022] The two output terminals of each bridge are electrically connected to the two input terminals of the corresponding mechanical switch K, and the two output terminals of each mechanical switch K are electrically connected to the input terminals of two multi-frequency combiners. Specifically, the mechanical switch K includes a first terminal, a second terminal, a third terminal, and a fourth terminal. The first and second terminals serve as the two input terminals of the mechanical switch K, and the third and fourth terminals serve as the two output terminals of the mechanical switch K. The terminals of the mechanical switch K are connected by jumpers to realize both combined transmission and transparent transmission switching settings.

[0023] Preferably, two adjacent POI combiner units are electrically connected via a leaky cable to enable signal transmission between multiple POI combiner units.

[0024] This utility model provides a 5G frequency-selective transparent transmission POI combiner device, supporting switching between transparent transmission and combined transmission modes, avoiding the need for diverse equipment types and reducing procurement costs. Each input frequency Freg1~7 is configured with switches K1~7, allowing selection of the corresponding frequency as the transparent transmission frequency based on the control switch K. The specific working principle is explained below using Freg: 2.1G frequency as an example:

[0025] (1) Transparent transmission mode

[0026] like Figure 2As shown, when a 2.1G signal needs to be transmitted within a tunnel with a coverage distance of 1000m, one 2.1G RRU is deployed at each of site 1 and site 3, and their corresponding POI1 and POI3 are both set to combined transmission mode. Site 2 does not need to deploy a 2.1G RRU; it only needs to set POI2 to transparent transmission Freg:2.1G mode. The 2.1G Cell1 signal of site 1 is transmitted to POI2 through leaky cable 1, and then transmitted to leaky cable 2 through the transmission channel of POI2, thus achieving a 2.1G Cell1 signal transmission coverage distance of 1000m for site 1. Similarly, the 2.1G Cell3 signal of site 3 is transmitted to the transparent POI2 via the leaky cable 2, and then transmitted to the leaky cable 1 through the transmission channel of POI2. This achieves a transmission coverage distance of 1000m for the 2.1G Cell3 signal of site 3. Other frequencies, such as 1.8G and 2.6G signals, cannot be transmitted transparently through POI2, and their transmission coverage distance via the leaky cable is only 500 meters. This results in an increase in the number of 2.1G signal sites and a reduction in the number of devices.

[0027] (2) Combining transmission mode

[0028] like Figure 3 As shown, when the 2.1G signal needs to cover a distance of 500m in the tunnel, one 2.1G RRU is deployed at each of the three sites, and their corresponding POI1, POI2 and POI3 are all set to the combined transmission mode. The 2.1G Cell1 signal of site 1 is transmitted to POI2 through the leaky cable 1, and cannot continue to be transmitted to the leaky cable 2 through POI2. Therefore, the 2.1G Cell1 signal transmission coverage distance is 500m. The transmission process of 2.1G Cell2 and 2.1G Cell3 is the same as that of 2.1G Cell1.

[0029] In this embodiment, the mechanical switch K is a frequency-selective & dual-mode switching physical mechanical switch K, using an NF interface, and the switch is turned on using an NM jumper connection. The specific working principle is explained below using a Freg:2.1G frequency as an example:

[0030] (1) Transparent transmission mode switch setting

[0031] like Figure 4 As shown, when the 2.1G Cell1 signal is transmitted from leaky cable 1 to POI and needs to be directly transmitted to leaky cable 2 via POI, terminals 3 and 4 of the physical mechanical switch K are connected with NM jumpers, and terminals 1 and 2 are unloaded (the POI input is disconnected). This achieves ① frequency selection: selecting the 2.1G frequency as the pass-through frequency, and ② pass-through: direct transmission via POI. Similarly, 2.1G Cell3 can also be transmitted directly from leaky cable 2 to leaky cable 1 via POI.

[0032] (2) Combining transmission mode switch setting

[0033] like Figure 5 As shown, when the 2.1G Cell2 signal is transmitted from POI to leaky cable 1 and leaky cable 2, the terminals 1 and 3 of the physical mechanical switch K are connected with NM jumpers, and the terminals 2 and 4 are connected with NM jumpers, thus realizing the combined transmission mode.

[0034] In this embodiment, transparent transmission at different frequencies can also be supported, as detailed below:

[0035] like Figure 6 As shown, different frequencies can be set as the transparent transmission frequency of POI simply by using a physical mechanical switch at each input port. There is no need to set a signal source at POI. The RRU signal of this frequency at the upper ANT1 can be directly transmitted to the lower ANT2 through POI. Figure 6 In the image, the left side shows NR 2.1G frequency pass-through, and the right side shows FDD 1.8G frequency pass-through.

[0036] This utility model has been described with reference to the above-described embodiments and accompanying drawings. However, the above embodiments are merely examples for implementing this utility model. It must be noted that the disclosed embodiments do not limit the scope of this utility model. On the contrary, modifications and equivalent provisions included in the spirit and scope of the claims are all included within the scope of this utility model.

Claims

1. A 5G frequency-selective transparent transmission POI combiner device, characterized in that: It includes a POI combiner unit; each POI combiner unit includes two or more bridges, two multi-frequency combiners, and two or more mechanical switches K; the number of bridges is equal to the number of mechanical switches K and they correspond one-to-one; the input terminal of each bridge is connected to a signal source of a different frequency, the two output terminals of each bridge are electrically connected to the two input terminals of the corresponding mechanical switch K, and the two output terminals of each mechanical switch K are electrically connected to the input terminals of the two multi-frequency combiners.

2. The 5G frequency-selective transparent transmission POI combiner device according to claim 1, characterized in that: Two adjacent POI combiner units are electrically connected via a leaky cable.

3. The 5G frequency-selective transparent transmission POI combiner device according to claim 1, characterized in that: The number of the electrical bridge and the number of mechanical switches K are both seven.

4. The 5G frequency-selective transparent transmission POI combiner device according to claim 1, characterized in that: The mechanical switch K includes a first terminal, a second terminal, a third terminal, and a fourth terminal. The first and second terminals serve as the two input terminals of the mechanical switch K, and the third and fourth terminals serve as the two output terminals of the mechanical switch K. The terminals of the mechanical switch K are connected by jumpers to realize two switching settings: combined transmission and transparent transmission.

5. A 5G frequency-selective transparent transmission POI combiner device according to claim 1, characterized in that: The frequency range of the signal source is between 700MHz and 3700MHz.

6. A 5G frequency-selective transparent transmission POI combiner device according to claim 1, characterized in that: The unused input terminals of the bridge are connected to a load.

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