Indoor distribution system, assessment method and related devices

Abstract

The application provides an indoor distribution system, an evaluation method and related equipment, wherein the indoor distribution system comprises a signal source, a first feeder, a second feeder, a first branch line, a first power distributor, a first antenna and a second antenna; the signal source is connected with a first end of the first feeder and a first end of the second feeder respectively, a second end of the first feeder is arranged in a first area, and the second end of the first feeder is connected with the first antenna; a first target position of the second feeder is connected with an input end of the first power distributor, an output end of the first power distributor is connected with a first end of the first branch line, a second end of the first branch line is arranged in the first area, and the second end of the first branch line is connected with the second antenna, and the first target position is a position between the first end of the second feeder and a second end of the second feeder. The indoor distribution system provided by the application can reduce the reconstruction cost of a double-path indoor distribution system.

Description

Technical Field

[0001] This application relates to the field of wireless communication technology, and in particular to an indoor distribution system, evaluation method and related equipment. Background Technology

[0002] Indoor environments are a key scenario for the large-scale deployment of 5G technology. With the growth of data services, it is necessary to upgrade traditional single-path indoor distribution systems to dual-path indoor distribution systems.

[0003] Currently, a frequency conversion scheme is typically used to upgrade traditional single-path indoor distribution systems to dual-path systems. This scheme requires adding a near-end unit to perform down-conversion to convert one of the 5G signal sources to a lower frequency and combine it with the other channel to achieve frequency-division transmission of 5G two channels in a single-path indoor distribution system. Then, a remote unit is added to perform up-conversion. This scheme involves adding both near-end and remote units, resulting in a high cost for the dual-path indoor distribution system upgrade method. Summary of the Invention

[0004] This application provides an indoor distribution system, evaluation method, and related equipment, which solves the problem of high cost in the reconstruction method of dual-path indoor distribution systems.

[0005] To achieve the above objectives, in a first aspect, embodiments of this application provide an indoor distribution system, including: a signal source, a first feeder, a second feeder, a first branch line, a first power divider, a first antenna, and a second antenna;

[0006] The signal source is connected to the first end of the first feed line and the first end of the second feed line respectively. The second end of the first feed line is located in the first region and is connected to the first antenna.

[0007] The first target position of the second feed line is connected to the input terminal of the first power divider, the output terminal of the first power divider is connected to the first end of the first branch line, the second end of the first branch line is located in the first region, the second end of the first branch line is connected to the second antenna, and the first target position is the position between the first end of the second feed line and the second end of the second feed line.

[0008] Secondly, embodiments of this application provide an indoor distribution system evaluation method, including:

[0009] Determine N location points within the target area, where N is a positive integer;

[0010] acquire N first reference signal received powers and N second reference signal received powers of the N position points, one of the N first reference signal received powers being a reference signal received power of one of the two-way signals at a target position point, one of the N second reference signal received powers being a reference signal received power of the other of the two-way signals at the target position point, the target position point being any one of the N position points;

[0011] determine an evaluation result according to the N first reference signal received powers and the N second reference signal received powers.

[0012] In a third aspect, an embodiment of the present application provides an indoor distribution system evaluation device, including:

[0013] a first determination module configured to determine N position points in a target area, N being a positive integer;

[0014] an acquisition module configured to acquire N first reference signal received powers and N second reference signal received powers of the N position points, one of the N first reference signal received powers being a reference signal received power of one of the two-way signals at a target position point, one of the N second reference signal received powers being a reference signal received power of the other of the two-way signals at the target position point, the target position point being any one of the N position points;

[0015] a second determination module configured to determine an evaluation result according to the N first reference signal received powers and the N second reference signal received powers.

[0016] In a fourth aspect, an embodiment of the present application provides an electronic device, including a processor, a memory, and a computer program stored in the memory and capable of running on the processor, when the computer program is executed by the processor, the steps in the indoor distribution system evaluation method according to the second aspect are implemented.

[0017] In a fifth aspect, an embodiment of the present application provides a readable storage medium, characterized by storing a program, when the program is executed by a processor, the steps in the indoor distribution system evaluation method according to the second aspect are implemented.

[0018] In the embodiment of the present application, the signal source is connected with the first end of the first feeder and the first end of the second feeder respectively, the second end of the first feeder is arranged in the first area, the second end of the first feeder is connected with the first antenna, and the signal coverage of one branch to the first area is realized through the first antenna. The first target position of the second feeder is connected with the input end of the first power distributor, the output end of the first power distributor is connected with the first end of the first branch line, the second end of the first branch line is arranged in the first area, the second end of the first branch line is connected with the second antenna, and the signal coverage of another branch to the first area is realized through the second antenna, so that the signal coverage of the double-path indoor distribution system is realized. The indoor distribution system provided by the present application does not need to add new near-end machines and far-end machines, the device cost is low, the existing indoor distribution system can be used without modification, and the power distributor and the branch line are only needed to be added, so that the construction is simple, the reconstruction cost is low, and the cost of the double-path indoor distribution system reconstruction is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings in the specification are described as follows, and obviously, the following drawings are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the listed drawings.

[0020] Figure 1 is one of the structural schematic diagrams of the indoor distribution system provided by the embodiments of the present application;

[0021] Figure 2 is the second structural schematic diagram of the indoor distribution system provided by the embodiments of the present application;

[0022] Figure 3 is one of the flow schematic diagrams of the indoor distribution system evaluation method provided by the embodiments of the present application;

[0023] Figure 4 is the second flow schematic diagram of the indoor distribution system evaluation method provided by the embodiments of the present application;

[0024] Figure 5 is the structural schematic diagram of the indoor distribution system evaluation device provided by the embodiments of the present application;

[0025] Figure 6 is the structural schematic diagram of the electronic device provided by the embodiments of the present application. DETAILED DESCRIPTION

[0026] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application. On the basis of the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of the present application.

[0027] With reference to Figure 1 The present application provides an indoor distribution system, comprising: a signal source 1, a first feeder 11, a second feeder 12, a first branch 122, a first power divider 121, a first antenna 111 and a second antenna 123. The signal source 1 provided by the embodiments of the present application includes but is not limited to a 2G signal source, a 3G signal source, a 4G signal source and a 5G signal source. The first feeder 11, the second feeder 12 and the first branch 122 provided by the embodiments of the present application can all be radio frequency cables. The first power divider 121 provided by the embodiments of the present application is used to proportionally divide the output power of the second feeder 12 into at least two paths. The first antenna 111 and the second antenna 123 provided by the present application are components for transmitting or receiving electromagnetic waves, which can send signals to terminal devices in the first area and also can receive signals sent by terminal devices in the first area. Optionally, the first antenna 111 is a room distribution antenna, and the first power divider 121 is a coupler.

[0028] The signal source 1 is connected with the first end of the first feeder 11 and the first end of the second feeder 12 respectively, the second end of the first feeder 11 is arranged in the first area, and the second end of the first feeder 11 is connected with the first antenna 111. In the specific implementation, the number and position of the first antenna 111 can be set according to actual needs, so that the signals of the first antenna 111 can completely cover the first area. If the area of the first area is large, multiple first antennas 111 can be arranged to ensure that the signals of the first antenna 111 cover each position in the first area. If the signal strength required by different positions in the first area is different, two or more first antennas 111 can be arranged at positions in the first area where the required signal strength is large. Optionally, the indoor distribution system comprises at least two first antennas 111, and the at least two first antennas 111 are uniformly spaced and connected with the second end of the first feeder 11. As mentioned above, the first antenna 111 can send signals to terminal devices in the first area and also can receive signals sent by terminal devices in the first area.

[0029] The first target position of the second feeder 12 is connected with the input end of the first power divider 121, the output end of the first power divider 121 is connected with the first end of the first branch line 122, the second end of the first branch line 122 is arranged in the first area, the second end of the first branch line 122 is connected with the second antenna 123, and the first target position is a position between the first end of the second feeder 12 and the second end of the second feeder 12. As described above, the first power divider 121 is used to divide the output power of the signal source 1 into at least two paths in proportion, and one of the paths is fed to the second antenna 123 through the first branch line 122. As described above, the second antenna 123 can send signals to the terminal equipment in the first area and can also receive signals sent by the terminal equipment in the first area. Alternatively, the second antenna 123 is a wall-mounted antenna, so that a second antenna 123 can be arranged at a position of the first branch line 122 just entering the first area, and the wall-mounted antenna radiates signals to other positions of the first area, which can cover the entire first area. Through the above arrangement, the length of the first branch line 122 can be saved, the wiring construction difficulty can be reduced, the number of the second antenna 123 can be saved, that is, only one second antenna 123 is arranged, and thus the cost of the indoor distribution system is reduced.

[0030] In the embodiment of the application, the signal source 1 is connected with the first end of the first feeder 11 and the first end of the second feeder 12 respectively, the second end of the first feeder 11 is arranged in the first area, the second end of the first feeder 11 is connected with the first antenna 111, and the signal coverage of the first area by one branch is realized through the first antenna 111. By connecting the first target position of the second feeder 12 with the input end of the first power divider 121, connecting the output end of the first power divider 121 with the first end of the first branch line 122, arranging the second end of the first branch line 122 in the first area, and connecting the second end of the first branch line 122 with the second antenna 123, the second antenna 123 realizes the signal coverage of the first area by another branch, and thus the double-path signal coverage of the indoor distribution system is realized. The indoor distribution system provided by the application does not need to add new near-end machines and far-end machines, the device cost is low, the existing indoor distribution system can be used without modification, the power divider and the branch line are only added, the construction is simple, the modification cost is low, and thus the cost of realizing the reconstruction of the double-path indoor distribution system is reduced.

[0031] Alternatively, referring to Figure 2The indoor distribution system also includes a third antenna 124, a fourth antenna 114, a second branch line 113, and a second power divider 112. The second branch line 113 provided in this embodiment can be an RF cable. The second power divider 112 provided in this embodiment is used to proportionally distribute the output power of the first feeder 11 into at least two paths. The third antenna 124 and the fourth antenna 114 provided in this application are components used to transmit or receive electromagnetic waves, capable of sending signals to terminal devices in the second area and receiving signals transmitted by terminal devices in the second area. Optionally, the third antenna 124 is an indoor distribution antenna, and the second power divider 112 is a coupler.

[0032] The second end of the second feeder 12 is located in the second area, and the second end of the second feeder 12 is connected to the third antenna 124. In practice, the number and location of the third antenna 124 can be set according to actual needs to ensure that the signal from the third antenna 124 can completely cover the second area. If the area of ​​the second area is large, multiple third antennas 124 can be set to ensure signal coverage at all locations within the second area. If different locations in the second area require different signal strengths, two or more third antennas 124 can be set at locations requiring higher signal strength. Optionally, the indoor distribution system includes at least two third antennas 124, which are evenly spaced and connected to the second end of the second feeder 12. As mentioned earlier, the third antenna 124 can transmit signals to terminal devices in the second area and can also receive signals transmitted by terminal devices in the second area.

[0033] Zone 1 and Zone 2 are two spatially isolated zones. Spatial isolation includes at least one of floor isolation and spatial distance isolation. Floor isolation means that Zone 1 and Zone 2 are on different floors, and there is signal isolation between Zone 1 and Zone 2 due to the floor. Spatial distance isolation means that Zone 1 and Zone 2 are different zones on the same floor, such as Zone 1 being located in the North Zone and Zone 2 being located in the South Zone.

[0034] The second target position of the first feed line 11 is connected to the input terminal of the second power divider 112, the output terminal of the second power divider 112 is connected to the first end of the second branch line 113, the second end of the second branch line 113 is located in the second region, the second end of the second branch line 113 is connected to the fourth antenna 114, and the second target position is the position between the first end of the first feed line 11 and the second end of the first feed line 11.

[0035] The second power divider 112 is used to proportionally divide the output power of the signal source 1 into at least two paths, and feed one of the paths to the fourth branch line through the second branch line 113. The fourth branch line has been described above, and can send signals to the terminal devices in the second area, or receive signals sent by the terminal devices in the second area. Optionally, the fourth branch line is a wall-mounted antenna, so that one fourth branch line can be arranged at the position where the second branch line 113 enters the second area, and the wall-mounted antenna radiates signals to other positions in the second area, which can cover the entire second area. Through the above arrangement, the length of the second branch line 113 can be saved, and the number of the fourth branch line can be saved, that is, only one fourth branch line is arranged, thereby reducing the cost of the indoor distribution system.

[0036] In the embodiment of the application, the signal source 1 is connected with the first end of the first feeder line 11 and the first end of the second feeder line 12 respectively, the second end of the second feeder line 12 is arranged in the second area, the second end of the second feeder line 12 is connected with the third antenna 124, and the signal coverage of one branch to the second area is realized through the third antenna 124. By connecting the second target position of the first feeder line 11 with the input end of the second power divider 112, connecting the output end of the second power divider 112 with the first end of the second branch line 113, arranging the second end of the second branch line 113 in the second area, and connecting the second end of the second branch line 113 with the fourth antenna 114, the fourth antenna 114 realizes the signal coverage of another branch to the second area, thereby realizing the double-path signal coverage of the indoor distribution system. The indoor distribution system provided by the application does not need to add new near-end machines and far-end machines, has low device cost, and can be realized by adding only the power divider and the branch line without changing the existing indoor distribution system, so that the construction is simple, the reconstruction cost is low, and the cost of realizing the reconstruction of the double-path indoor distribution system is reduced.

[0037] In a specific implementation, the arrangement position and arrangement mode of the second antenna 123 can affect the signal coverage effect of the indoor distribution system. In order to make the indoor distribution system have a better signal coverage effect, optionally, the connection position of the second antenna 123 with the second end of the first branch line 122 is determined according to the output power of the first antenna 111, the output power of the second antenna 123, and the characteristic value of the first power divider 121, and the characteristic value of the first power divider 121 is determined according to the line loss and the target power.

[0038] In a specific implementation, the average value AVE(ΔRSRP) of the double-path signal imbalance (for a specific formula, refer to the description below) is a function of the coupling degree C0 of the coupler and the antenna installation position (x0, y0, z0). The optimization steps of the double-path signal imbalance are as follows:

[0039] 1) The coupling degree of the coupler is not continuous, and should be reasonably selected according to the actual transformation needs. In principle, on the one hand, it is ensured that the extracted power matches the gain of the wall-mounted antenna to cover the target area, and on the other hand, the power loss of the extracted power feeder cannot be too large. When a coupler with a coupling degree of more than 10 dB is usually selected, the insertion loss is not more than 1 dB.

[0040] 2) Derive the dual-channel signal imbalance with respect to the antenna coordinates, and when AVE(ΔRSRP) takes the minimum value, the optimal placement coordinates of the antenna are obtained, and at this time, the dual-channel coverage effect is the best.

[0041] In practical applications, the indoor distribution system provided by the present application can be used to transform a single-channel indoor distribution system, which is described in detail below. If there are two feeder channels of a signal source in a certain scene: the first feeder and the second feeder are respectively fed into the single-channel indoor distribution system of the south area and the north area of the same floor through a single feeder. The dual-channel upgrade process of this scene is: 1) according to the output power of the signal source, the output power requirement of the single-channel indoor distribution system, the coverage requirement of the target area, and the principle of minimizing the power difference of the dual-channel signal, select a coupler with appropriate size, connect the first feeder and the second feeder to a coupler respectively, and realize the cross-extraction of signals of different feeders through signal power distribution; 2) adopt a radio frequency cable to connect the coupler, and cross-transmit the signals of the first feeder and the second feeder to the north area and the south area respectively, and feed them into the corresponding wall-mounted antenna. 3) according to the shape, area and other characteristics of the target area, select a wall-mounted antenna with beam width, gain and other indicators that meet the requirements, and install it on the wall facing the target area at an appropriate position, and adjust the downtilt angle and azimuth angle of the antenna to ensure that the beam radiated by the antenna can cover the farthest point of the target area, and meet the requirement that the power difference of the dual-channel signal is not too large.

[0042] The embodiment of the present application also provides an indoor distribution system evaluation method, which is applied to the indoor distribution system provided by the embodiment of the present application, as shown in Figure 3 The method comprises the following steps:

[0043] Step 201: determining N position points in a target area, N being a positive integer.

[0044] The target area is an area that needs to be evaluated for the signal coverage intensity of the indoor distribution system, that is, it can be the first area and the second area described above. In order to achieve better evaluation effect, N position points can also be selected uniformly in the target area with a certain step value, and the N position points are uniformly distributed in the target area.

[0045] At step 202, N first reference signal received powers and N second reference signal received powers of the N position points are acquired, one of the N first reference signal received powers is a reference signal received power of one of the two-way signals at a target position point, one of the N second reference signal received powers is a reference signal received power of the other of the two-way signals at the target position point, and the target position point is any one of the N position points.

[0046] In a specific implementation, as an example, for the first area, the first reference signal received power is a radiation signal power received by the target position point from the first antenna, if the indoor distribution system has multiple first antennas, the first reference signal received power is a sum of radiation signal powers received by the target position point from the multiple first antennas. The second reference signal received power is a radiation signal power received by the target position point from the second antenna, if the indoor distribution system has multiple second antennas, the second reference signal received power is a sum of radiation signal powers received by the target position point from the multiple second antennas. For the second area, the first reference signal received power is a radiation signal power received by the target position point from the third antenna, if the indoor distribution system has multiple third antennas, the first reference signal received power is a sum of radiation signal powers received by the target position point from the multiple third antennas. The first reference signal received power is a radiation signal power received by the target position point from the fourth antenna, if the indoor distribution system has multiple fourth antennas, the first reference signal received power is a sum of radiation signal powers received by the target position point from the multiple fourth antennas.

[0047] At step 203, an evaluation result is determined according to the N first reference signal received powers and the N second reference signal received powers.

[0048] In a specific implementation, a difference between the N first reference signal received powers and the N second reference signal received powers can be taken as the evaluation result.

[0049] Optionally, the determining of the evaluation result according to the N first reference signal received powers and the N second reference signal received powers comprises:

[0050] According to the N first reference signal received powers and the N second reference signal received powers, N imbalance degree values of the N position points are determined. In a specific implementation, an imbalance degree value ΔRSRP of a target position point A is A which can be determined according to the following expression:

[0051] ΔRSRP A = the first reference signal received power RSRP DAS-A - the second reference signal received power RSRP ANT-A .

[0052] The above method can be used to determine the N imbalance values ​​at N locations in sequence.

[0053] After obtaining N imbalance values ​​at N locations, the first average value of the N imbalance values, AVE(ΔRSRP), is determined as ∑ N ΔRSRP / N, the evaluation result includes the first average value.

[0054] The dual-path power imbalance value, also known as the imbalance value mentioned above, is a key factor affecting uplink and downlink throughput. Therefore, the smaller the first average value, the better the dual-path power balance, and the closer the uplink and downlink throughput is to the ideal dual-path effect.

[0055] In this embodiment, N location points are determined within the target area, and the received power of N first reference signals and N second reference signals at these N location points are obtained. The evaluation result is then determined based on these N first reference signal received power and N second reference signal received power. Thus, by determining N location points within the target area, the signal coverage effect of the indoor distribution system can be evaluated using the received power of the reference signals at these N location points, providing theoretical prediction and guidance for the setup of the indoor distribution system.

[0056] In practical applications, different areas within the same region have varying traffic demands. For example, in a supermarket, the traffic demand at the checkout counter is significantly higher than in general merchandise areas. Areas with higher traffic demands require better dual-path coverage to ensure a good user experience. To better evaluate the signal coverage effect of an indoor distribution system by considering the varying traffic demands of different areas within the same region, the method may optionally include the following step before determining the evaluation result based on the received power of the N first reference signals and the received power of the N second reference signals:

[0057] Obtain historical traffic data within the target area;

[0058] Based on the historical traffic data, determine the P traffic percentage values ​​of P sub-regions, where the P sub-regions are sub-regions obtained after dividing the target region, and P is a positive integer greater than 1.

[0059] The step of determining the evaluation result based on the received power of the N first reference signals and the received power of the N second reference signals includes:

[0060] Based on the received power of the N first reference signals and the received power of the N second reference signals, determine the P target average values ​​of the P sub-regions.

[0061] The P target mean values and the P traffic proportion values are multiplied one by one and summed to obtain an intermediate value;

[0062] The intermediate value is divided by a traffic proportion sum value to obtain a second mean value, and the evaluation result comprises the second mean value, and the traffic proportion sum value is a sum of the P traffic proportion values.

[0063] In a specific implementation, P is taken as 2, that is, the target area G is divided into two sub-areas G1 and G2, if the traffic ratio of G1 and G2 is m:n, then the traffic proportion value of the sub-area G1 is m, and the traffic proportion value of the sub-area G2 is n.

[0064] The determination manner of the target mean value can be the same as the determination manner of the first mean value, and optionally, the P target mean values of the P sub-areas are determined according to the N first reference signal received powers and the N second reference signal received powers, comprising:

[0065] M imbalance degree values of M position points in a first sub-area are determined, M is a positive integer, and the P sub-areas comprise the first sub-area;

[0066] An average value of the M imbalance degree values is determined as the target mean value of the first sub-area.

[0067] In the sub-area G1, the target mean value AVE G1 of the sub-area G1 is equal to an average value of imbalance degree values of the optional multiple position points. In the sub-area G2, the target mean value AVE G2 of the sub-area G2 is equal to an average value of imbalance degree values of the optional multiple position points.

[0068] The second mean value AVE G (ΔRSRP) can be determined according to the following expression:

[0069] AVE G (ΔRSRP) = [mAVE G1 (ΔRSRP) + nAVE G2 (ΔRSRP) / (m + n)]

[0070] In the embodiments of the application, by considering the factor that different pieces of areas in the same area have different traffic demands, a weighted average representation method of the double-path signal power difference, that is, the above method, is proposed, and the practicability of the indoor distribution system evaluation method is enhanced.

[0071] The indoor distribution system evaluation method provided by the embodiments of the application is specifically described below with a specific example.

[0072] Solution method for two-way signal power and power difference at any position in space:

[0073] For the target transformation area, set the length, width and height as a x b x c, and establish a rectangular coordinate system.

[0074] 1) RSRP (Reference Signal Receiving Power) solution under single-path DAS coverage

[0075] Suppose there are n single-path room antenna headends in the target area. The output power of each antenna headend is known, which is P1, P2, … Pn respectively. m …,P n . The coordinates of each antenna headend are known, which are (i1, j1, k1), (i2, j2, k1), …, (in, jn, kn) respectively. m ,j m ,k m )…,(i n ,j n ,k n ).

[0076] For any point A in the target area, the coordinates are (x, y, z), and the distance d m from each room antenna headend to point A is:

[0077]

[0078] The signal power radiated from the room antenna headend decays in space transmission, and the decay amount is a function of transmission distance and frequency. One optional way is to use the free space loss formula:

[0079] Loss = Loss(f, d) = 20lg(f) + 20lg(d) + 32.4

[0080] The loss Loss is in dB, where f is the frequency in MHz and d is the propagation distance in km.

[0081] The general formula for the reference signal receiving power RSRP m received by point A from the mth room antenna headend is:

[0082] RSRP m = P m - 35.2 - Loss m , 1 ≤ m ≤ n

[0083] Here P m - 35.2 refers to the output power of each subcarrier of the signal source for the 5G system, and Loss mis the loss of the signal power radiated by the mth room-division antenna head in the spatial transmission.

[0084] A point received total power of room-division signal RSRP DAS-A is:

[0085] RSRP DAS-A = RSRP1 + RSRP2 + … + RSRP n

[0086] 2) RSRP solution under wall-mounted antenna coverage

[0087] Let the installation position coordinates of the wall-mounted antenna be (x0, y0, z0), and the gain of the antenna in the determined direction be where is the azimuth angle of the antenna, and θ is the elevation angle of the antenna.

[0088] The actual coverage of the signal radiated by the wall-mounted antenna in the area is related to the installation position of the antenna.

[0089] i. When the wall-mounted antenna array is parallel to the x-axis, that is, y0 = 0 or b, 0 < x0 < a, assume that the antenna gain maximum beam is just directed to the opposite point B (x0, |y0-b|, z), where z indicates the height of the user terminal from the ground, z < z0, then the antenna downtilt angle α = arctan[(z0-z) / b]. For any point A (x, y, z), the azimuth angle of the antenna is The elevation angle θ = π / 2-α-arctan[|y-y0| / (z0-z)]. According to the 3D pattern data of the wall-mounted antenna, the antenna gain pointing to point A is obtained by table lookup

[0090] ii. When the wall-mounted antenna array is parallel to the y-axis, that is, x0 = 0 or a, 0 < y0 < b, assume that the antenna gain maximum beam is just directed to the opposite point C(|x0-a|, y0, z), then the antenna downtilt angle α = arctan[(z0-z) / a]

[0091] For any point A (x, y, z), the azimuth angle of the antenna is The elevation angle θ = π / 2-α-arctan[|x-x0| / (z0-z)].

[0092] Above, by obtaining the azimuth angle and the elevation angle of the antenna, according to the known 3D pattern data of the wall-mounted antenna, the antenna gain pointing to any point A is obtained by table lookup

[0093] Let the signal source be a 5G 2TR RRU, and the transmission powers of the two channels be P channel1 and P channel2Channel one feeds a single-path DAS in the target area, channel two feeds a single-path DAS in the non-target area, and a part of power from channel two is fed to the wall-mounted antenna covering the target area through the coupler.

[0094] Let the coupling degree of the coupler be C0.

[0095] Let the length of the radio frequency cable used between the signal source and the wall-mounted antenna be L, which is related to the coordinate of the installation position of the wall-mounted antenna, and the corresponding cable loss be Loss(L).

[0096] The signal power P emitted by the wall-mounted antenna ANT can be expressed as:

[0097] The signal from the wall-mounted antenna to point A has a transmission loss, and the transmission distance is According to the free space loss formula, the attenuation Loss ANT-A = Loss(f, d ANT-A ) = 20lg(f) + 20lg(d ANT-A ) + 32.4.

[0098] Where f is the frequency, in MHz.

[0099] The reference signal received power RSRP received by point A from the wall-mounted antenna is obtained as: ANT-A

[0100] RSRP ANT-A = P ANT - 35.2 - Loss ANT-A

[0101] In summary, point A receives dual-path signals from the room distribution antenna and the wall-mounted antenna at the same time, and the dual-path power imbalance ΔRSRP is obtained as: A = RSRP DAS-A - RSRP ANT-A .

[0102] In actual applications, the indoor distribution system evaluation method provided by the embodiments of the present application can be used to evaluate the improvement of the dual-path indoor distribution system. Referring to Figure 4 , the user inputs the single-path DAS distribution and the output power of each stage, the target area information, the wall-mounted antenna directional diagram data, the preset coupling degree of the coupler, the output power of the signal source single channel, the unit loss of the radio frequency cable, and the signal source position. According to the indoor distribution system evaluation method provided by the embodiments of the present application, the installation position of the wall-mounted antenna, the dual-path power imbalance distribution diagram, and the average value of the dual-path power imbalance can be determined.

[0103] Referring to Figure 5 ​The embodiment of the application provides an indoor distribution system evaluation device 300, which comprises:

[0104] A first determination module 301 is configured to determine N position points in a target area, wherein N is a positive integer;

[0105] An acquisition module 302 is configured to acquire N first reference signal receiving powers and N second reference signal receiving powers of the N position points, wherein one of the N first reference signal receiving powers is a reference signal receiving power of one of two-way signals at a target position point, one of the N second reference signal receiving powers is a reference signal receiving power of the other of the two-way signals at the target position point, and the target position point is any one of the N position points;

[0106] A second determination module 303 is configured to determine an evaluation result according to the N first reference signal receiving powers and the N second reference signal receiving powers.

[0107] Optionally, the second determination module 303 comprises:

[0108] determining N imbalance degree values of the N position points according to the N first reference signal receiving powers and the N second reference signal receiving powers;

[0109] determining a first average value of the N imbalance degree values, and the evaluation result comprises the first average value.

[0110] Optionally, before the second determination module 303, the device 300 further comprises:

[0111] acquiring historical traffic data in the target area;

[0112] determining P traffic proportion values of P sub-areas according to the historical traffic data, wherein the P sub-areas are sub-areas obtained by dividing the target area, and P is a positive integer greater than 1;

[0113] The second determination module 303 comprises:

[0114] determining P target average values of the P sub-areas according to the N first reference signal receiving powers and the N second reference signal receiving powers;

[0115] multiplying the P target average values and the P traffic proportion values one by one and then summing up to obtain an intermediate value;

[0116] dividing the intermediate value by a traffic proportion sum value to obtain a second average value, wherein the evaluation result comprises the second average value, and the traffic proportion sum value is a sum of the P traffic proportion values.

[0117] Optionally, the determining the P target mean values of the P sub-regions according to the N first reference signal received powers and the N second reference signal received powers comprises:

[0118] determining M imbalance values of M position points in a first sub-region, M being a positive integer, the P sub-regions comprising the first sub-region;

[0119] determining an average value of the M imbalance values as the target mean value of the first sub-region.

[0120] The indoor distribution system evaluation device 300 provided by the embodiments of the present application can realize the various processes and achieve the same beneficial effects as the indoor distribution system evaluation method embodiments of the present application. To avoid repetition, details are not described herein.

[0121] An electronic device is provided in the embodiments of the present application. As shown in Figure 6 The electronic device 400 comprises a processor 401, a memory 402, and a computer program stored in the memory 402 and executable on the processor. The various components in the electronic device 400 are coupled together through a bus system 403. It can be understood that the bus system 403 is used to realize the connection and communication between the components.

[0122] The processor 401 is configured to determine N position points in a target region, N being a positive integer.

[0123] obtaining N first reference signal received powers and N second reference signal received powers of the N position points, one of the N first reference signal received powers being a reference signal received power of one of two-way signals at a target position point, one of the N second reference signal received powers being a reference signal received power of the other of the two-way signals at the target position point, the target position point being any one of the N position points;

[0124] determining an evaluation result according to the N first reference signal received powers and the N second reference signal received powers.

[0125] Optionally, the processor 401 is further configured to determine N imbalance values of the N position points according to the N first reference signal received powers and the N second reference signal received powers.

[0126] determining a first average value of the N imbalance values, the evaluation result comprising the first average value.

[0127] Optionally, the processor 401 is further configured to acquire historical traffic data in the target area.

[0128] determine P traffic proportion values of P sub-areas according to the historical traffic data, the P sub-areas being sub-areas obtained by dividing the target area, and P being a positive integer greater than 1.

[0129] determine the evaluation result according to the N first reference signal received powers and the N second reference signal received powers, including:

[0130] determine P target mean values of the P sub-areas according to the N first reference signal received powers and the N second reference signal received powers.

[0131] multiply the P target mean values and the P traffic proportion values corresponding to each other and sum up to obtain an intermediate value.

[0132] divide the intermediate value by a traffic proportion sum value to obtain a second average value, the evaluation result including the second average value, and the traffic proportion sum value being a sum of the P traffic proportion values.

[0133] Optionally, the processor 401 is further configured to determine M imbalance degree values of M position points in a first sub-area, M being a positive integer, and the P sub-areas including the first sub-area.

[0134] determine an average value of the M imbalance degree values as the target mean value of the first sub-area.

[0135] The electronic device 400 provided by the embodiments of the present application can realize each process that can be realized by the indoor distribution system evaluation method embodiments of the present application, and achieve the same beneficial effects. To avoid repetition, details are not repeated here.

[0136] The embodiments of the present application further provide a computer readable storage medium, and the computer readable storage medium stores a computer program. The computer program is executed by a processor to realize each process of the above-mentioned indoor distribution system evaluation method embodiments and achieve the same technical effects. To avoid repetition, details are not repeated here. The computer readable storage medium is, for example, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0137] The embodiments of the present application are described above with reference to the accompanying drawings, but the present application is not limited to the specific embodiments described above, and the specific embodiments described above are merely illustrative, but not restrictive, and a person of ordinary skill in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims.

Claims

1. An indoor distribution system, characterized by The indoor distribution system comprises: a signal source, a first feeder, a second feeder, a first branch line, a first power divider, a first antenna and a second antenna; the signal source is connected with a first end of the first feeder and a first end of the second feeder respectively, a second end of the first feeder is arranged in a first area, the second end of the first feeder is connected with the first antenna, the first antenna is a room antenna, and the second antenna is a wall-mounted antenna; a first target position of the second feeder is connected with an input end of the first power divider, an output end of the first power divider is connected with a first end of the first branch line, a second end of the first branch line is arranged in the first area, the second end of the first branch line is connected with the second antenna, and the first target position is a position between the first end of the second feeder and a second end of the second feeder; a connection position of the second antenna with the second end of the first branch line is determined according to an output power of the first antenna, an output power of the second antenna and a characteristic value of the first power divider, and the characteristic value of the first power divider is determined according to line loss and target power.

2. The indoor distribution system of claim 1, wherein, The indoor distribution system further comprises a third antenna, a fourth antenna, a second branch line and a second power divider; a second end of the second feeder is arranged in a second area, the second end of the second feeder is connected with the third antenna, the first area and the second area are two areas that are spatially isolated, and the spatial isolation comprises at least one of floor isolation and spatial distance isolation; a second target position of the first feeder is connected with an input end of the second power divider, an output end of the second power divider is connected with a first end of the second branch line, a second end of the second branch line is arranged in the second area, the second end of the second branch line is connected with the fourth antenna, and the second target position is a position between the first end of the first feeder and a second end of the first feeder.

3. The indoor distribution system of claim 1, wherein, The indoor distribution system comprises at least two first antennas, and the at least two first antennas are uniformly spaced and connected with the second end of the first feeder.

4. The indoor distribution system of claim 1, wherein, The first power divider is a coupler.

5. A method for evaluating an indoor distribution system, applied to the indoor distribution system according to any one of claims 1 to 4, characterized in that, The method comprises: determining N position points in a target area, N being a positive integer; obtaining N first reference signal received powers and N second reference signal received powers of the N position points, one of the N first reference signal received powers being a reference signal received power of one of two-way signals at a target position point, one of the N second reference signal received powers being a reference signal received power of the other of the two-way signals at the target position point, and the target position point being any one of the N position points; determining an evaluation result according to the N first reference signal received powers and the N second reference signal received powers.

6. The method of claim 5, wherein, The determining of the evaluation result according to the N first reference signal received powers and the N second reference signal received powers comprises: determining N imbalance degree values of the N position points according to the N first reference signal received powers and the N second reference signal received powers. determining a first average value of the N imbalance values, the evaluation result comprising the first average value.

7. The method of claim 6, wherein, Before the determining the evaluation result according to the N first reference signal received powers and the N second reference signal received powers, the method further comprises: obtaining historical traffic data in the target area; determining P traffic proportion values of P sub-areas according to the historical traffic data, the P sub-areas being sub-areas obtained by dividing the target area, and P being a positive integer greater than 1; the determining the evaluation result according to the N first reference signal received powers and the N second reference signal received powers comprises: determining P target average values of the P sub-areas according to the N first reference signal received powers and the N second reference signal received powers; multiplying the P target average values and the P traffic proportion values corresponding to each other and then summing up to obtain an intermediate value; dividing the intermediate value by a traffic proportion sum value to obtain a second average value, the evaluation result comprising the second average value, and the traffic proportion sum value being a sum of the P traffic proportion values.

8. The method of claim 7, wherein, the determining the P target average values of the P sub-areas according to the N first reference signal received powers and the N second reference signal received powers comprises: determining M imbalance values of M position points in a first sub-area, M being a positive integer, and the P sub-areas comprising the first sub-area; determining an average value of the M imbalance values as the target average value of the first sub-area.

9. An indoor distribution system evaluation device for evaluating an indoor distribution system according to any one of claims 1 to 4, characterized by The apparatus comprises: a first determining module configured to determine N position points in a target area, N being a positive integer; an obtaining module configured to obtain N first reference signal received powers and N second reference signal received powers of the N position points, one of the N first reference signal received powers being a reference signal received power of one of two-way signals at a target position point, one of the N second reference signal received powers being a reference signal received power of the other of the two-way signals at the target position point, and the target position point being any one of the N position points; a second determining module configured to determine an evaluation result according to the N first reference signal received powers and the N second reference signal received powers.

10. An electronic device, comprising: The computer program is stored in the readable storage medium and is run on the processor to implement the steps in the indoor distribution system evaluation method according to any one of claims 5 to 8.

11. A readable storage medium, characterized by, The program is stored in the readable storage medium and is run on the processor to implement the steps in the indoor distribution system evaluation method according to any one of claims 5 to 8.

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