Indoor wireless coverage distribution system

Abstract

The invention discloses an indoor wireless coverage distribution system, relates to the technical field of communication, and solves the problems that the overall indoor communication smoothness cannot be ensured and seamless switching between wireless networks cannot be completed due to the condition that the signal intensity of a part of regions is too high or too low. The wireless coverage distribution system comprises a wireless multi-system access platform, a signal quality evaluation module, a user track prediction module, a channel resource configuration module, an antenna network module and a plurality of indoor communication base stations. And through a channel resource configuration module, calculating comprehensive evaluation values of all base station access points related to the predicted advancing track according to the predicted advancing track, and setting the base station access point with the highest comprehensive evaluation value as an optimal base station access point to which a user prepares to switch. Channel resources are allocated to the corresponding optimal base station access point in advance after the user enters the set range; according to the invention, seamless switching between wireless networks can be completed according to the expected action track of the user, channel resource reservation is carried out in advance, and continuity and stability of network connection are ensured.

Description

Technical Field

[0001] The invention belongs to the field of communication technology, and in particular relates to an indoor wireless coverage distribution system. Background Art

[0002] At present, people have an increasing demand for mobile communication services, especially in indoor environments, where the demand for wireless networks is increasing and more stable and efficient coverage solutions are needed. However, due to the complex structure and materials of buildings, indoor mobile service coverage often has problems, such as weak signals and signal blocking. Therefore, it is crucial to design and study wireless coverage distribution systems for indoor scenarios.

[0003] The invention patent with patent number CN202211356119.3 and patent name "A 5G wireless communication indoor distribution system and method" discloses a 5G wireless communication indoor distribution system and method, including an acquisition module for acquiring the design plan of the building and decomposing the acquired design plan into several floor plans; a marking module for marking the wiring resource areas of the transmission lines and power lines on the floor plan, and generating a marked construction drawing; a survey module for arranging 5G signal sources in the wiring resource areas of the floor plan; a server module for acquiring data information of the marked construction drawing, traversing the wiring resource area, and generating an optimal layout diagram based on the survey parameter results; an interference module for interfering with areas with uneven signal strength distribution in the optimal layout diagram.

[0004] The above-mentioned existing technical solutions optimize indoor 5G to avoid situations where the signal strength in some areas is too high or too low, thereby ensuring smooth overall indoor communication. However, they cannot complete seamless switching between wireless networks. The indoor wireless coverage distribution system proposed in the present invention can quickly and efficiently switch wireless networks. Summary of the invention

[0005] The purpose of the present invention is to provide an indoor wireless coverage distribution system, which can calculate the comprehensive evaluation value of all base station access points involved in the predicted travel trajectory according to the predicted travel trajectory through a channel resource configuration module, and set the base station access point with the highest comprehensive evaluation value as the optimal base station access point that the user is ready to switch to, and allocate channel resources in advance to the corresponding optimal base station access point after the user enters the set range; the present invention can complete seamless switching between wireless networks according to the user's expected action trajectory, reserve channel resources in advance, and ensure the continuity and stability of network connection.

[0006] The present invention adopts the following technical scheme: an indoor wireless coverage distribution system, comprising: a wireless multi-system access platform, a signal quality evaluation module, a user trajectory prediction module, a channel resource configuration module, an antenna network module and a plurality of indoor communication base stations; wherein,

[0007] The wireless multi-system access platform includes a combiner; the combiner is used to combine wireless signals of different frequency bands of various mobile communication operators and send them to the antenna terminal; the combiner is also used to directly forward the wireless signals sent by the communication base station to the signal quality evaluation module;

[0008] The signal quality evaluation module includes a signal quality detection unit and a signal quality evaluation unit; the signal quality detection unit is used to detect the quality of the wireless signal sent by the communication base station and transferred by the wireless multi-system access platform, and obtain the signal strength and signal-to-noise ratio of the wireless signal; the signal quality evaluation unit is used to calculate the signal quality evaluation value according to the signal strength and signal-to-noise ratio of the wireless signal;

[0009] The user trajectory prediction module includes a position acquisition unit and a trajectory prediction unit; the position acquisition unit is used to calculate the real-time position information of each user terminal; the trajectory prediction unit is used to predict the user's travel trajectory and obtain the predicted travel trajectory through the real-time position information of the user terminal and a preset trajectory prediction model;

[0010] A channel resource configuration module is used to calculate the comprehensive evaluation value of all base station access points involved in the predicted travel trajectory according to the predicted travel trajectory, and set the base station access point with the highest comprehensive evaluation value as the optimal base station access point that the user is ready to switch to, and allocate channel resources in advance to the corresponding optimal base station access point after the user enters the set range;

[0011] The antenna network module includes multiple antenna terminals for receiving wireless signals sent by the user end and sending wireless signals output by the communication base station;

[0012] An indoor communication base station comprises a baseband processing unit and a radio remote unit; the baseband processing unit is connected to a plurality of radio remote units via cables;

[0013] The signal quality evaluation module, the user trajectory prediction module, the channel resource configuration module and the radio frequency remote unit are all communicatively connected with the wireless multi-system access platform.

[0014] Preferably, the signal quality detection unit in the signal quality evaluation module obtains the signal strength and signal-to-noise ratio of the wireless signal sent by the indoor communication base station and transferred by the wireless multi-system access platform;

[0015] Signal strength RSSI: Among them, P rx Represents the received wireless signal power, Pref Indicates the reference power;

[0016] Signal-to-Noise Ratio SINR: Among them, P noise Represents the total noise power, P interference Indicates the total interference power.

[0017] Preferably, the signal quality evaluation module calculates the signal quality evaluation value Q of each base station access point: Q=w1*RSSI+w2*SINR; wherein w1 represents a weight parameter of signal strength, w2 represents a weight parameter of signal-to-noise ratio, RSSI represents the signal strength of the base station access point, and SINR represents the signal-to-noise ratio of the base station access point.

[0018] Preferably, the user trajectory prediction module calculates the user's position coordinates d(x, y) by the following formula: Among them, α i Indicates the exponential weight corresponding to the communication base station, 0<α i <1,i=1,2,...,n,d(x i ,y i ) represents the location coordinates of the i-th communication base station, t ia Indicates the time when the communication base station sends to the user end, t ib It represents the time when the communication base station receives the signal sent by the user end, and c represents the signal propagation speed.

[0019] Preferably, the channel resource configuration module calculates the comprehensive evaluation values ​​of all wireless network access points involved in the current predicted travel trajectory according to the predicted travel trajectory, and sets the wireless network access point with the highest comprehensive evaluation value as the optimal base station access point to be switched by the user; if the predicted travel trajectory output by the user trajectory prediction module enters the signal coverage area of ​​the new communication base station, or the signal quality evaluation value of the base station to which the user is connected is less than a preset switching threshold, the channel resource configuration module determines whether to allocate channel resources in advance according to a preset switching decision value; if the switching decision value is met, the communication base station allocates channel resources in advance.

[0020] Preferably, the comprehensive evaluation value Z is: Z(i)=w3*Q(i)+w4*C(i)+w5*R(i); wherein Q() represents the signal quality evaluation value, i represents the i-th communication base station, C() represents the base station channel capacity evaluation value, R() represents the base station switching risk assessment value, w3 represents the weight coefficient of the signal quality evaluation value Q, w4 represents the weight coefficient of the channel capacity evaluation value C, and w5 represents the weight coefficient of the switching risk assessment value R; the base station channel capacity evaluation value C and the base station switching risk assessment value R are both preset values.

[0021] Preferably, the optimal base station access point Among them, Z represents the comprehensive evaluation value, argmax() represents the function of finding the parameter with the maximum score, and the base station access point S with the highest comprehensive evaluation value is next This is the optimal base station access point to be switched.

[0022] Preferably, the switching decision value H=(Q<(Q set -Q delay ))∩(Q<Q next ), where Q represents the base station access point signal quality assessment value, Q set The switching threshold Q represents the base station access point signal quality evaluation value. delay The switching hysteresis parameter, Q, represents the signal quality evaluation value of the base station access point. next Indicates the signal quality evaluation value of the optimal base station access point to be switched.

[0023] Preferably, the several communication base stations include a 2G communication base station, a 3G communication base station and a 4G communication base station, and the communication base stations are all connected to a wireless multi-system access platform.

[0024] Preferably, the trajectory prediction unit uses the user's real-time location information and a trajectory prediction model trained with the user's location coordinate data to predict the user's route.

[0025] The present invention calculates the comprehensive evaluation value of all base station access points involved in the predicted moving trajectory according to the predicted moving trajectory through a channel resource configuration module, sets the base station access point with the highest comprehensive evaluation value as the optimal base station access point to be switched by the user, and allocates channel resources in advance to the corresponding optimal base station access point after the user enters the set range; seamless switching between wireless networks can be completed according to the user's expected action trajectory, channel resources are reserved in advance, and the continuity and stability of the network connection are ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0027] Figure 1 The structure diagram of an indoor wireless coverage distribution system of the present invention is shown in FIG. DETAILED DESCRIPTION

[0028] The present invention is described in detail below with reference to the accompanying drawings and embodiments:

[0029] like Figure 1It is a structural block diagram of an indoor wireless coverage distribution system, including: a wireless multi-system access platform, a signal quality evaluation module, a user trajectory prediction module, a channel resource configuration module, an antenna network module and several indoor communication base stations;

[0030] The wireless multi-system access platform includes a combiner; the combiner is used to combine wireless signals of different frequency bands of various mobile communication operators and send them to the antenna terminal; the combiner is also used to directly forward the wireless signals sent by the communication base station to the signal quality evaluation module;

[0031] The signal quality evaluation module includes a signal quality detection unit and a signal quality evaluation unit; the signal quality detection unit is used to detect the quality of the wireless signal sent by the communication base station and transferred by the wireless multi-system access platform, and obtain the signal strength and signal-to-noise ratio of the wireless signal; the signal quality evaluation unit is used to calculate the signal quality evaluation value according to the signal strength and signal-to-noise ratio of the wireless signal;

[0032] The user trajectory prediction module includes a position acquisition unit and a trajectory prediction unit; the position acquisition unit is used to calculate the real-time position information of each user terminal; the trajectory prediction unit is used to predict the user's travel trajectory and obtain the predicted travel trajectory through the real-time position information of the user terminal and a preset trajectory prediction model;

[0033] A channel resource configuration module is used to calculate the comprehensive evaluation value of all base station access points involved in the predicted travel trajectory according to the predicted travel trajectory, and set the base station access point with the highest comprehensive evaluation value as the optimal base station access point that the user is ready to switch to, and allocate channel resources in advance to the corresponding optimal base station access point after the user enters the set range;

[0034] The antenna network module includes multiple antenna terminals for receiving wireless signals sent by the user end and sending wireless signals output by the communication base station;

[0035] The indoor communication base station includes a baseband processing unit and a radio frequency remote unit; the baseband processing unit is connected to a plurality of radio frequency remote units through cables, and the radio frequency remote units are communicatively connected to a wireless multi-system access platform.

[0036] The baseband processing unit of each indoor communication base station is connected to multiple radio remote units through cables. The baseband processing unit transmits the baseband signal to the radio remote unit. The radio remote unit performs radio frequency processing on the baseband signal and transmits the wireless signal obtained after the radio frequency processing to the wireless multi-system access platform. The wireless multi-system access platform processes and integrates the wireless signal through a combiner and distributes it to each antenna terminal. The signal quality evaluation module, the user trajectory prediction module and the channel resource configuration module are all connected to the wireless multi-system access platform.

[0037] In the present invention, the indoor communication base station includes a 2G communication base station, a 3G communication base station and a 4G communication base station, all of which are communicatively connected to a wireless multi-system access platform; in the indoor communication base station, the baseband processing unit is used to process the baseband signal sent by the base station; the radio frequency remote unit is used to modulate and demodulate the baseband signal, and convert the baseband signal into a wireless signal suitable for wireless transmission.

[0038] In this embodiment, the baseband processing unit adopts BBU, the radio remote unit adopts GSM900M for mobile 2G-RRU, SCDMA for mobile 3G-RRU, LTE (E band) for mobile 4G-RRU, CDMA 800MHz for telecom 2G-RRU, LTE FDD2.1GHz for telecom 4G-RRU, and GSM1800 / LTE FDD1.8GHz for Unicom. The access frequency band is 1735-1765MHz for uplink and 1830-1860MHz for downlink.

[0039] In this embodiment, the forward end input of the wireless multi-system access platform is wireless signals of different frequency bands from indoor communication base stations. The wireless multi-system access platform combines multiple uplink signals of different frequency bands into one and transmits it to the antenna terminal; the reverse end input is downlink signals of different network standards sent from the user end. The wireless multi-system access platform detects different wireless signals according to the frequency bands of each network standard and transmits them to the corresponding operator base station.

[0040] In this embodiment, the user terminal receives a wireless signal transmitted from an indoor communication base station, and the signal quality detection unit in the signal quality evaluation module obtains the signal strength and signal-to-noise ratio of the wireless signal transmitted by the indoor communication base station and transferred by the wireless multi-system access platform.

[0041] Signal strength RSSI: Among them, P rx Represents the received wireless signal power, P ref Indicates the reference power;

[0042] Signal-to-Noise Ratio SINR: Among them, P noise Represents the total noise power, P interference represents the total interference power;

[0043] The signal quality evaluation unit calculates the signal quality evaluation value Q according to the signal strength and signal-to-noise ratio of the wireless signal:

[0044] Q = w1*RSSI+w2*SINR (1)

[0045] Wherein, w1 represents the weight value of signal strength, and w2 represents the weight value of signal-to-noise ratio.

[0046] In this embodiment, since each user can receive signals transmitted by multiple communication base stations at the same time, the round-trip time of the signal between the user terminal and each communication base station is calculated, that is, the time when the communication base station sends the wireless signal to the user, and the time when the corresponding communication base station receives the returned wireless signal after the user receives the wireless signal and sends the returned wireless signal to the corresponding communication base station; according to the round-trip time of the signal and the signal propagation speed, the distance from each user terminal to each communication base station can be calculated, and finally the position coordinates d(x, y) of the user terminal can be estimated by the algorithm;

[0047]

[0048] Among them, d(x, y) represents the location coordinates of the user terminal, α i Indicates the weight coefficient corresponding to the base station, 0<α i <1, i=1, 2,...,n; d(x i ,y i ) represents the position coordinates of the preset i-th communication base station, t ia Indicates the time when the communication base station sends the wireless signal, t ib represents the reception time of the communication base station receiving the returned wireless signal, and c represents the signal propagation speed;

[0049] In this embodiment, the trajectory prediction unit uses the user's real-time location information and the trajectory prediction model trained with the user's location coordinate data to predict the user's route. The construction and training of the trajectory prediction model are conventional techniques in the art and will not be described in detail here.

[0050] In the present invention, the channel resource configuration module obtains the optimal base station access point through the comprehensive evaluation value of each communication base station; if the predicted travel trajectory output by the user trajectory prediction module enters the signal coverage area of ​​the new communication base station, or the signal quality evaluation value of the base station connected by the user is less than the preset switching threshold, the channel resource configuration module determines whether to allocate channel resources in advance according to the preset switching decision value; if the switching decision value is met, the communication base station allocates channel resources in advance.

[0051] In the invention, the channel resource configuration module calculates the comprehensive evaluation values ​​of all wireless network access points involved in the current predicted travel trajectory according to the predicted travel trajectory, and sets the wireless network access point with the highest comprehensive evaluation value as the optimal base station access point to be switched by the user, and allocates channel resources in advance to the corresponding optimal base station access point after the user meets the switching decision value;

[0052] In this embodiment, the comprehensive evaluation value is:

[0053] Z(i)=w3*Q(i)+w4*C(i)+w5*R(i)(3)

[0054] Wherein, Q() represents the signal quality assessment value, i represents the i-th communication base station, C() represents the base station channel capacity assessment value, R() represents the base station switching risk assessment value, w3 represents the weight coefficient of the signal quality assessment value Q, w4 represents the weight coefficient of the channel capacity assessment value C, and w5 represents the weight coefficient of the switching risk assessment value R; the base station channel capacity assessment value C and the base station switching risk assessment value R are both preset values;

[0055] Then we get the base station access point S with the highest comprehensive evaluation value. next :

[0056]

[0057] Among them, Z() represents the comprehensive evaluation value, argmax() represents the function of finding the parameter with the maximum score, and the base station access point S with the highest comprehensive evaluation value next That is, the optimal base station access point to be switched;

[0058] In this embodiment, the switching decision value is:

[0059] H=(Q<(Q set -Q delay ))∩(Q<Q next ) (5)

[0060] Among them, Q represents the signal quality evaluation value of the current base station access point, Q set represents the switching threshold of the preset base station access point signal quality evaluation value, Q delay represents the switching hysteresis parameter of the preset base station access point signal quality evaluation value, Q next Indicates the signal quality evaluation value of the optimal base station access point to be switched;

[0061] The channel resource configuration module determines whether the switching decision value is met. When the switching decision value is met, the communication base station will allocate channel resources in advance to establish a connection with the user end to ensure that the signal is stable before switching.

[0062] The present invention can solve the problem of unstable signal switching when multiple network systems coexist, complete seamless switching between wireless networks according to the user's expected movement trajectory, reserve channel resources in advance, and ensure the continuity and stability of network connection.

[0063] Example:

[0064] When the user is within the coverage of the communication base station, the location acquisition unit of the user trajectory prediction module calculates the real-time location information of the user terminal, and the trajectory prediction unit uses the real-time location information of the user terminal and a preset trajectory prediction model to predict the user's travel trajectory and obtain a predicted travel trajectory;

[0065] The channel resource configuration module calculates the comprehensive evaluation value of all base station access points involved in the predicted travel trajectory according to the signal quality evaluation value calculated by the signal quality evaluation module, the preset base station channel capacity evaluation value C and the base station switching risk evaluation value R, and sets the base station access point with the highest comprehensive evaluation value as the optimal base station access point to which the user is ready to switch;

[0066] When the user's predicted travel trajectory enters the signal coverage area of ​​a new communication base station, or the signal quality evaluation value of the indoor communication base station to which the user is connected is less than the preset switching threshold, the channel resource configuration module determines whether to allocate channel resources in advance based on the preset switching decision value. When the signal quality evaluation value of the indoor communication base station to which the user is connected is less than the switching threshold minus the preset switching hysteresis parameter, and is less than the signal quality evaluation value of the optimal base station access point to be switched, the indoor communication base station to be switched will allocate channel resources in advance to establish a connection with the user terminal to ensure that the signal is switched after it is stable.

Claims

1. An indoor wireless coverage distribution system, characterized in that: include: Wireless multi-system access platform, signal quality evaluation module, user trajectory prediction module, channel resource configuration module, antenna network module and several indoor communication base stations; among them, The wireless multi-system access platform includes a combiner; the combiner is used to combine wireless signals of different frequency bands of various mobile communication operators and send them to the antenna terminal; the combiner is also used to directly forward the wireless signals sent by the communication base station to the signal quality evaluation module; The signal quality evaluation module includes a signal quality detection unit and a signal quality evaluation unit; the signal quality detection unit is used to detect the quality of the wireless signal sent by the communication base station and transferred by the wireless multi-system access platform, and obtain the signal strength and signal-to-noise ratio of the wireless signal; the signal quality evaluation unit is used to calculate the signal quality evaluation value according to the signal strength and signal-to-noise ratio of the wireless signal; The user trajectory prediction module includes a position acquisition unit and a trajectory prediction unit; the position acquisition unit is used to calculate the real-time position information of each user terminal; the trajectory prediction unit is used to predict the user's travel trajectory and obtain the predicted travel trajectory through the real-time position information of the user terminal and a preset trajectory prediction model; A channel resource configuration module is used to calculate the comprehensive evaluation value of all base station access points involved in the predicted travel trajectory according to the predicted travel trajectory, and set the base station access point with the highest comprehensive evaluation value as the optimal base station access point that the user is ready to switch to, and allocate channel resources in advance to the corresponding optimal base station access point after the user enters the set range; The antenna network module includes multiple antenna terminals for receiving wireless signals sent by the user end and sending wireless signals output by the communication base station; An indoor communication base station comprises a baseband processing unit and a radio remote unit; the baseband processing unit is connected to a plurality of radio remote units via cables; The signal quality evaluation module, the user trajectory prediction module, the channel resource configuration module and the radio frequency remote unit are all communicatively connected with the wireless multi-system access platform.

2. An indoor wireless coverage distribution system according to claim 1, characterized in that: The signal quality detection unit in the signal quality evaluation module obtains the signal strength and signal-to-noise ratio of the wireless signal sent by the indoor communication base station and transferred by the wireless multi-system access platform; Signal strength RSSI: Among them, P rx Represents the received wireless signal power, P ref Indicates the reference power; Signal-to-Noise Ratio SINR: Among them, P noise Represents the total noise power, P interference Indicates the total interference power.

3. An indoor wireless coverage distribution system according to claim 2, characterized in that: The signal quality evaluation module calculates the signal quality evaluation value Q of each base station access point: Q=w1*RSSI+w2*SINR; wherein w1 represents the weight parameter of signal strength, w2 represents the weight parameter of signal-to-noise ratio, RSSI represents the signal strength of the base station access point, and SINR represents the signal-to-noise ratio of the base station access point.

4. The indoor wireless coverage distribution system according to claim 1, characterized in that: The user trajectory prediction module calculates the user's location coordinates d(x, y) by the following formula: Among them, α i Indicates the exponential weight corresponding to the communication base station, 0<α i <1, i=1,2,…,n,d(x i ,y i ) represents the location coordinates of the i-th communication base station, t ia Indicates the time when the communication base station sends to the user end, t ib It represents the time when the communication base station receives the signal sent by the user end, and c represents the signal propagation speed.

5. The indoor wireless coverage distribution system according to claim 1, characterized in that: The channel resource configuration module calculates the comprehensive evaluation values ​​of all wireless network access points involved in the current predicted travel trajectory according to the predicted travel trajectory, and sets the wireless network access point with the highest comprehensive evaluation value as the optimal base station access point to be switched by the user; If the predicted moving trajectory output by the user trajectory prediction module enters the signal coverage area of ​​the new communication base station, or the signal quality evaluation value of the base station to which the user is connected is less than the preset switching threshold, the channel resource configuration module determines whether to allocate channel resources in advance according to the preset switching decision value; if the switching decision value is met, the communication base station allocates channel resources in advance.

6. An indoor wireless coverage distribution system according to claim 5, characterized in that: The comprehensive evaluation value Z is: Z(i)=w3*Q(i)+w4*C(i)+w5*R(i); wherein Q() represents the signal quality evaluation value, i represents the i-th communication base station, C() represents the base station channel capacity evaluation value, R() represents the base station switching risk assessment value, w3 represents the weight coefficient of the signal quality evaluation value Q, w4 represents the weight coefficient of the channel capacity evaluation value C, and w5 represents the weight coefficient of the switching risk assessment value R; the base station channel capacity evaluation value C and the base station switching risk assessment value R are both preset values.

7. An indoor wireless coverage distribution system according to claim 5, characterized in that: The optimal base station access point Among them, Z represents the comprehensive evaluation value, argmax() represents the function of finding the parameter with the maximum score, and the base station access point S with the highest comprehensive evaluation value is next This is the optimal base station access point to be switched.

8. An indoor wireless coverage distribution system according to claim 5, characterized in that: The switching decision value H=(Q<(Q set -Q delay ))∩(Q next ), where Q represents the base station access point signal quality assessment value, Q set The switching threshold Q represents the base station access point signal quality evaluation value. delay The switching hysteresis parameter, Q, represents the signal quality evaluation value of the base station access point. next Indicates the signal quality evaluation value of the optimal base station access point to be switched.​ 9. An indoor wireless coverage distribution system according to claim 1, characterized in that: The several communication base stations include 2G communication base stations, 3G communication base stations and 4G communication base stations, and the communication base stations are all connected to the wireless multi-system access platform.

10. An indoor wireless coverage distribution system according to claim 1, characterized in that: The trajectory prediction unit uses the user's real-time location information and a trajectory prediction model trained with the user's location coordinate data to predict the user's route.

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