CN103997750A - Indoor multisystem-shared downlink signal processing method and device - Google Patents

Abstract

Embodiments of the present invention provide an indoor downlink signal processing method and equipment shared by multiple systems, which are applied to an indoor distribution system shared by multiple communication networks. Information; determine the indoor antenna whose coverage includes the location information, and select at least one indoor antenna whose transmission quality of the downlink signal satisfies the set condition at the location indicated by the location information from the determined indoor antennas; Send a downlink signal to the terminal by using the selected indoor antenna. In the downlink signal processing solution provided by the embodiment of the present invention, in the indoor distribution system shared by multiple communication networks, for the terminal using each communication network, at least one antenna with the best coverage quality is selected at the location of the terminal Perform downlink coverage, thereby improving the downlink coverage quality of the communication network.

Description

A downlink signal processing method and device shared by multiple indoor systems

The application of the present invention is a divisional application of the invention application with the filing date of January 10, 2011, the application number of 201110003806.2, and the title of the invention "a method and device for processing indoor uplink and downlink signals shared by multiple systems".

technical field

The present invention relates to the communication field, in particular to a downlink signal processing method and equipment shared by multiple indoor systems.

Background technique

With the development of communication networks, the usage of data services is increasing rapidly, and most of the data services occur indoors. Therefore, improving the coverage quality of communication networks indoors has become a top priority.

2G systems (eg, CDMA system and GSM system) use electromagnetic waves with a frequency of 824-960 MHz, which have strong penetrating ability and good indoor signals. 3G systems (such as CDMA2000 system, WCDMA system, and TD-SCDMA system) mostly use electromagnetic waves with a frequency of about 2000 MHz, which have a weak ability to penetrate buildings, and indoor signals are poorer than 2G systems. As the frequency of electromagnetic waves used by communication systems (eg, LTE systems) further increases, the ability of the electromagnetic waves to penetrate buildings is further weakened, and indoor signals will form more blind spots compared to 3G systems. At present, the indoor distribution system mostly adopts the omnidirectional single-polarization antenna method, but with the increase of the frequency of electromagnetic waves used in the communication system, the coverage distance of the omnidirectional single-polarization antenna is relatively short, which cannot meet the coverage quality requirements of indoor signal transmission.

The traditional method of improving the indoor coverage quality of the communication network mainly improves the indoor coverage quality of the communication network by improving the downlink coverage quality of the communication network, such as increasing the number of indoor antenna nodes or increasing the transmission power of the base station antenna.

Improving the uplink communication quality of the communication network is generally achieved by increasing the transmit power of the terminal antenna. However, due to the limited power of the terminal transmit signal, the ability to improve the terminal transmit signal by increasing the terminal transmit power is limited, resulting in the uplink of the communication network. The coverage quality is poor, often the terminal can receive the downlink signal sent by the base station, but the destination network element of the terminal's uplink communication, such as the base station, cannot receive the uplink signal sent by the terminal or the quality of the received uplink signal is poor.

The existing methods for improving the downlink coverage of communication networks have the following problems:

Increasing the transmission power of the base station antenna will also be limited by the power capacity of the base station and the intensity of electromagnetic radiation. The downlink coverage of the communication network is still limited. In some areas, the downlink coverage quality is poor and cannot solve the problem of coverage dead spots;

Increasing the number of indoor antenna nodes will inevitably complicate the wiring and the network structure due to the addition of network nodes, which cannot solve the problem of coverage dead spots and the problem of poor downlink coverage in some areas. Especially in the case of multi-system sharing, due to the different frequencies of each system, the coverage range varies greatly. If the number of antenna nodes is increased, the repeated coverage of multiple nodes in the low-frequency system in some areas will cause adjacent cell interference.

Therefore, there is an urgent need to introduce a signal processing scheme for improving the transmission quality of uplink and downlink signals in the case of multi-system sharing.

Contents of the invention

Embodiments of the present invention provide an indoor uplink signal processing method and equipment shared by multiple systems, which are used to solve the problem of poor quality of uplink signals received by base stations in existing communication networks.

A method for processing an uplink signal, applied to an indoor distribution system shared by multiple communication networks, the method comprising:

For the uplink transmission process of each communication network, M indoor antennas with a common coverage frequency band are selected from the indoor antennas, wherein the polarization mode of any one of the M indoor antennas is the same as that of the M indoor antennas. The polarization modes of at least one other indoor antenna in the antenna are orthogonal, or the polarization modes of the M indoor antennas are the same, and the M is an integer greater than 1;

Using the determined M indoor antennas to receive uplink signals;

Combining the M uplink signals received by M indoor antenna diversity into one uplink signal;

Wherein, the indoor antenna is a single-polarization antenna and/or each single-polarization antenna element in the multi-polarization antenna.

An uplink signal processing device, applied to an indoor distribution system shared by multiple communication networks, the device includes:

The antenna selection unit is used to select M indoor antennas with a common coverage frequency band from the indoor antennas for the uplink transmission process of each communication network, wherein the polarization mode of any one of the M indoor antennas is It is orthogonal to the polarization of at least one other indoor antenna in the M indoor antennas, or the polarization of the M indoor antennas is the same, the M is an integer greater than 1, and the indoor antenna is a single Each single polarized antenna element in the polarized antenna and/or multi-polarized antenna;

a signal receiving unit, configured to use the determined M indoor antennas to receive uplink signals;

A signal combining unit, configured to combine the M channels of the uplink signals received by the diversity of the M indoor antennas into one uplink signal.

In the uplink signal processing solution provided by the embodiment of the present invention, in the indoor distribution system shared by multiple communication networks, for terminals using each communication network, when the terminal needs to send an uplink signal, it can choose to jointly cover the uplink signal. The at least two indoor antennas in the frequency band where the signal is located combine the uplink signals respectively received by the selected at least two indoor antennas into one uplink signal through space diversity or polarization diversity of the selected at least two indoor antennas, thereby Utilize the diversity gain to improve the quality of the uplink signal received by the base station.

Embodiments of the present invention provide an indoor downlink signal processing method and equipment shared by multiple systems, which are used to solve the problem of poor downlink coverage quality of base station signals in existing communication networks.

A downlink signal processing method applied to an indoor distribution system shared by multiple communication networks, the method comprising:

For the downlink transmission process of each communication network, receive the location information fed back by the terminal;

Determine the indoor antenna whose coverage includes the location information, and select at least one indoor antenna whose transmission quality of the downlink signal satisfies the set condition at the location indicated by the location information from the determined indoor antennas;

Send a downlink signal to the terminal by using the selected indoor antenna.

A downlink signal processing device, applied to an indoor distribution system shared by multiple communication networks, the device includes:

The receiving unit is configured to receive the location information fed back by the terminal for each downlink transmission process of the communication network;

An antenna determining unit, configured to determine an indoor antenna whose coverage includes the location information, and select from the determined indoor antennas at the location indicated by the location information, the transmission quality of the downlink signal satisfies at least one of the set conditions root indoor antenna;

a sending unit, configured to send a downlink signal to the terminal by using the selected indoor antenna.

In the downlink signal processing solution provided by the embodiment of the present invention, in the indoor distribution system shared by multiple communication networks, for the terminal using each communication network, at least one antenna with the best coverage quality is selected at the location of the terminal Perform downlink coverage, thereby improving the downlink coverage quality of the communication network.

Embodiments of the present invention provide an indoor downlink signal processing method and equipment shared by multiple systems, which are used to solve the problem of coverage dead spots in the downlink coverage of base station signals in existing communication networks.

A downlink signal processing method applied to an indoor distribution system shared by multiple communication networks, the method comprising:

For the downlink transmission process of each communication network, receive the location information fed back by the terminal;

For each of the multiple indoor antennas, weight the amplitude and phase of the downlink signal to be sent in the antenna port, and send the weighted downlink signal of the indoor antenna at the position indicated by the position information. The transmission quality meets the set conditions;

The multiple indoor antennas are used to transmit amplitude- and phase-weighted downlink signals.

A downlink signal processing device, applied to an indoor distribution system shared by multiple communication networks, the device includes:

The receiving unit is configured to receive the location information fed back by the terminal for each downlink transmission process of the communication network;

The adjustment unit is configured to weight the amplitude and phase of the downlink signal to be sent in the antenna port for each indoor antenna among the multiple indoor antennas, and the indoor antenna that sends the weighted downlink signal is located at the location indicated by the position information The transmission quality of the downlink signal at the location meets the set conditions;

The sending unit is configured to use the plurality of indoor antennas to send amplitude- and phase-weighted downlink signals.

In the downlink signal processing solution provided by the embodiment of the present invention, in the indoor distribution system shared by multiple communication networks, for each communication network, the downlink signals transmitted through the ports of multiple antennas used to transmit downlink signals The amplitude and phase are weighted, and the antenna transmits the weighted downlink signal to achieve downlink coverage. The horizontal beam offset is used to enhance the downlink coverage in the required direction, and solve the problem of dead spots in downlink coverage.

Through the solutions provided by the embodiments of the present invention, the quality of uplink and downlink signal transmission can be improved for any communication network such as GSM, CDMA, WCDMA, TD-SCDMA, LTE and WLAN. However, in LTE and WLAN systems using the 802.11n standard, the multi-antenna and multi-channel technology of the present invention can be directly used to improve the uplink and downlink coverage and transmission rate of the indoor distribution system. Therefore, the present invention can not only be applied in 2G, 3G and WLAN systems simultaneously, but also can be smoothly applied in LTE systems, and has the function of simultaneously covering all current indoor distribution systems.

Description of drawings

FIG. 1 is a flow chart of the steps of an uplink signal processing method provided in Embodiment 1 of the present invention;

FIG. 2 is a schematic structural diagram of an uplink signal processing device provided in Embodiment 2 of the present invention;

FIG. 3 is a schematic diagram of a system architecture provided by Embodiment 3 and Embodiment 8 of the present invention;

FIG. 4 is a flow chart of steps of a downlink signal processing method provided in Embodiment 4 of the present invention;

FIG. 5 is a schematic structural diagram of a downlink signal processing device provided in Embodiment 5 of the present invention;

FIG. 6 is a flowchart of steps of a downlink signal processing method provided in Embodiment 6 of the present invention;

FIG. 7 is a schematic structural diagram of a downlink signal processing device provided by Embodiment 7 of the present invention.

Detailed ways

The technical solutions of the present invention will be described below in conjunction with the accompanying drawings and various embodiments.

Embodiment one,

Embodiment 1 of the present invention provides an uplink signal processing method, which is applied to an indoor distribution system shared by multiple communication networks. The step flow of the method is shown in FIG. 1 , and specifically includes the following steps:

Step 101. Select at least two indoor antennas with common coverage frequency bands.

In various embodiments of the present invention, the indoor antenna may be a single-polarization antenna and/or each single-polarization antenna element in the multi-polarization antenna.

In the indoor distribution system shared by multiple communication networks, the communication network can be any communication network such as GSM, CDMA, WCDMA, TD-SCDMA, LTE and WLAN, and the uplink signal sent by any terminal using a certain communication network , according to the frequency band where the uplink signal is located, it is determined that the covered frequency band includes M (M is an integer greater than 1) indoor antennas in the frequency band where the uplink signal is located, and the pole of any one of the M indoor antennas is The polarization mode is orthogonal to that of at least one other indoor antenna among the M indoor antennas, or the polarization mode of the M indoor antennas is the same.

Among them, the orthogonal polarization methods include but are not limited to include the following two orthogonal methods:

+45 degree polarization mode and -45 degree polarization mode, or horizontal polarization mode and vertical polarization mode.

In particular, when a terminal using the GSM900MHz and CDMA800MHz systems sends an uplink signal, since the frequency band covered by the system is relatively low, generally 820MHz-960MHz, the uplink signal is generally received by a vertically polarized antenna.

There are two cases where the polarization mode of any one of the M indoor antennas is orthogonal to the polarization mode of at least one other indoor antenna among the M indoor antennas:

In the first case, the number of antennas using any polarization mode is one. For example, it is determined that the two antennas have a common coverage frequency band, and there is one horizontally polarized antenna and one antenna with orthogonal polarization modes. In this case, vertically polarized antennas can use the two antennas to receive uplink signals according to the polarization diversity principle and gain of polarization diversity.

In the second case, the number of antennas corresponding to at least one polarization mode is greater than 1. For example, it is determined that 3 antennas have a common coverage frequency band, and there is 1 horizontally polarized antenna and 2 vertically polarized antennas with orthogonal polarization modes. Polarized antennas, in this case, according to the principles of polarization diversity and space diversity, using the polarization diversity gain and space diversity gain, these three antennas can be used to receive uplink signals respectively.

Step 102. Use the determined indoor antenna to receive uplink signals.

After determining M indoor antennas for receiving uplink signals sent by terminals using a certain communication network, each of the determined M indoor antennas is used to receive the uplink signals sent by any terminal. up signal.

The M channels of uplink signals received by the M indoor antennas may be transmitted through N channels, where N is an integer not greater than M.

Step 103: Merge the M uplink signals received by the determined M indoor antennas through diversity into one uplink signal.

The specific implementation process of this step is: transmit the M uplink signals received by the determined M indoor antennas in diversity through corresponding channels respectively, and finally combine them into one uplink signal.

When the polarization of any one of the M indoor antennas is orthogonal to the polarization of at least one other of the M indoor antennas, the uplink signals on the M lines respectively received by the M indoor antennas Combined into one uplink signal, specifically including:

In the M indoor antennas, the uplink signals received by the indoor antennas using the same polarization mode are preliminarily combined, and the uplink signals obtained after the preliminary combination are recombined into one uplink signal.

When the polarization modes of the M indoor antennas are the same, the M uplink signals respectively received by the M indoor antennas are combined into one uplink signal, specifically including:

The M uplink signals respectively received by the M indoor antennas are combined into one uplink signal.

Embodiment two,

Embodiment 2 of the present invention provides an uplink signal processing device, which is applied to an indoor distribution system shared by multiple communication networks. The structural diagram of the device is shown in FIG. Merge unit 13, wherein:

The antenna selection unit 11 is used to select M indoor antennas with a common coverage frequency band from the indoor antennas for the uplink transmission process of each communication network, wherein the polarization mode of any one of the M indoor antennas is It is orthogonal to the polarization mode of at least one other indoor antenna among the M indoor antennas, or the polarization mode of the M indoor antennas is the same, and the M is an integer greater than 1;

The signal receiving unit 12 is used to receive uplink signals by using the determined M indoor antennas; the signal combining unit 13 is used to combine the M channels of uplink signals received by the diversity of the M indoor antennas into one uplink signal;

Wherein, the indoor antenna is a single-polarization antenna and/or each single-polarization antenna element in the multi-polarization antenna.

The signal receiving unit 12 is specifically configured to transmit the M channels of uplink signals received by the M indoor antennas through N channels, where N is an integer not greater than M.

The signal combining unit 13 is specifically configured to combine the M indoor antennas when the polarization mode of any one of the M indoor antennas is orthogonal to the polarization mode of at least one other indoor antenna among the M indoor antennas. Uplink signals received by indoor antennas using the same polarization mode in the antenna are initially combined, and the uplink signals obtained after the initial combination are combined again into one uplink signal.

The signal combining unit 13 is specifically configured to combine the M uplink signals respectively received by the M indoor antennas into one uplink signal when the polarization modes of the M indoor antennas are the same.

The technical solutions provided by Embodiment 1 and Embodiment 2 of the present invention will be described in detail below through a specific example.

Embodiment three,

Embodiment 3 of the present invention is a specific example of implementing the uplink signal processing method provided in Embodiment 1 of the present invention by using the uplink signal processing device provided in Embodiment 2 of the present invention. The system architecture provided in Embodiment 3 of the present invention is shown in FIG. 3 . The system architecture is applicable to an indoor distribution system shared by various communication networks, and the communication network may be any communication network such as GSM, CDMA, WCDMA, TD-SCDMA, LTE and WLAN.

The following describes the system architecture in Embodiment 3 by taking the indoor distribution system shared by the LTE system, the GSM system, and the TD-SCDMA system as an example.

As shown in Figure 3, the shared indoor distribution system is distributed in areas A, B, and C, and the distance between A/B/C areas is relatively long. A/B/C areas can be regarded as different floors in the same building In this case, in order to describe the coverage of antennas with different polarizations, antennas with different polarizations are used for coverage in areas A, B, and C. In actual situations, antennas with the same polarization type are generally used in the same building , in all indoor antennas deployed in area A, there are 3 antennas in the radiating nodes of dual-polarized antennas, and each radiating node of dual-polarized antennas includes a vertically polarized antenna element and a horizontally polarized antenna element A dual-polarized antenna, the vertically polarized antenna element can cover the frequency bands of 820MHz～960MHz, 1710MHz～2700MHz, and the horizontally polarized antenna can cover the frequency bands of 1710MHz～2700MHz; there are three vertically polarized antennas in all indoor antennas deployed in area B The antenna in the antenna radiation node can cover the frequency bands of 820MHz～960MHz, 1710MHz～2700MHz, and each vertically polarized antenna radiation node is equipped with two vertical poles with a certain distance (generally 2～10λ, λ is the wavelength). among all the indoor antennas deployed in area C, there are three ±45° polarized antenna antennas in the radiating node that can cover the frequency bands of 820MHz-960MHz and 1710MHz-2700MHz, and each antenna radiating node integrates one A dual-polarized antenna composed of a +45° polarized antenna element and a -45° polarized antenna element.

Taking area A as an example, when multiple systems share the indoor distribution system in area A, the process of using the indoor distribution system for TD-SCDMA terminals and LTE terminals will be described.

When the TD-SCDMA terminal needs to send uplink signals, taking the frequency bands of 1880-1920MHz and 2010-2025MHz as an example, the antenna selection unit needs to select multiple indoor antennas from the indoor antennas that jointly cover the frequency bands of 1880-1920MHz and 2010-2025MHz .

As shown in Figure 3, in area A, in each dual-polarized antenna radiation node (node 1, node 2, and node 3), the vertically polarized antenna element and the horizontally polarized antenna element can both cover 1880-1920MHz and 2010MHz ～2025MHz frequency band, that is, each node in area A has two antennas that can cover the 1880～1920MHz and 2010～2025MHz frequency bands. Therefore, the antenna selection unit can select from the dual-polarized antenna radiation node 1 to jointly cover 1880～1920MHz and 2010MHz 2 antenna elements with different polarizations in the ~2025MHz frequency band.

After the antenna selection unit determines the two indoor antennas (antenna elements) used to receive the uplink signal sent by the TD-SCDMA terminal, the signal receiving unit uses the determined two indoor antennas to respectively receive the uplink signal sent by the TD-SCDMA terminal. Signal.

When the signal combining unit confirms that the signal receiving unit has received the uplink signal, it combines the 2 uplink signals received by the determined 2 indoor antennas in diversity into 1 uplink signal. As shown in Figure 3, the specific operation of signal merging is as follows:

In the dual-polarized antenna radiating node 1, the horizontally polarized antenna element and the vertically polarized antenna element diversity receive the two uplink signals, and transmit them through their respective channels.

Send the uplink signals respectively transmitted in the channel corresponding to the horizontally polarized antenna element and the channel corresponding to the vertically polarized antenna element to the target TD-SCDMA network element of the TD-SCDMA terminal uplink signal transmission, such as a TD-SCDMA base station, and After the dual-channel RRU and BBU transmission, it is finally combined into one uplink signal at the base station. The TD-SCDMA network element for this purpose combines the received uplink signal into one way, realizing the use of one integrated horizontally polarized antenna oscillator The dual-polarized antenna together with one vertically polarized antenna element receives the uplink signal sent by the TD-SCDMA terminal. According to the principle of polarization diversity, the quality of uplink signal transmission is enhanced by using polarization diversity gain.

When an LTE terminal needs to send an uplink signal, taking the frequency band used by the terminal as 2300MHz-2400MHz as an example, the antenna selection unit can select a vertically polarized antenna from the polarized antenna radiation node 1 in area A that jointly covers the 2300MHz-2400MHz frequency band The vibrator and one horizontally polarized antenna vibrator adopt MIMO antenna technology to improve the coverage quality and data transmission rate of the network. The specific application method will not be described in detail in the present invention.

Taking area B as an example below, when multiple systems share the indoor distribution system in area B, the process of using the indoor distribution system by the GSM terminal will be described.

When the GSM terminal needs to send an uplink signal, the frequency range used by the GSM900MHz system is 880MHz-960MHz, so the antenna selection unit needs to select an indoor antenna covering the frequency band of 880MHz-960MHz from the indoor antennas.

As shown in Figure 3, in area B, there is a vertically polarized antenna in the radiating node, and there are two vertically polarized antennas that can cover the 820MHz-960MHz frequency band. Therefore, the antenna selection unit can select from any radiating node in area B. Two vertically polarized antennas covering the 820MHz-960MHz frequency band.

After the antenna selection unit determines the two indoor antennas for receiving the uplink signal sent by the GSM terminal, the signal receiving unit uses the determined two indoor antennas to receive the uplink signal sent by the GSM terminal, and transmits the uplink signal through the channel.

The uplink signal transmitted in the channel is sent to the destination GSM network element of the GSM terminal uplink signal transmission, such as the GSM base station, so as to realize the use of two vertically polarized antennas to receive the uplink signal sent by the GSM terminal.

If the GSM terminal sends an uplink signal in area A, it selects a vertically polarized antenna element that meets the coverage conditions to receive the uplink signal.

The coverage of area C is similar to that of area A, and the dual-polarized antenna integrated with the +45° polarized antenna element and the -45° polarized antenna element at the same node is used instead of the integrated horizontally polarized antenna element and the vertically polarized antenna element A dual polarized antenna.

Embodiment four,

Embodiment 4 of the present invention provides a downlink signal processing method, which is applied to an indoor distribution system shared by multiple communication networks. The step flow of the method is shown in FIG. 4 , and specifically includes the following steps:

Step 201, receiving location information fed back by a terminal.

When a communication network element, such as a base station, needs to send a downlink signal to a terminal, it needs to communicate with the terminal and receive the location information fed back by the terminal, so as to determine the location of the terminal.

There may be one or multiple terminals, and the location may be a location where one terminal is located, or a location area where multiple terminals are located.

Step 202, determine an antenna for transmitting downlink signals.

Determine the indoor antenna whose coverage includes the location information, and select at least one indoor antenna whose downlink signal transmission quality satisfies the set condition at the location indicated by the location information from the determined indoor antennas.

The transmission quality of the downlink signal may be determined by at least one parameter used to indicate the communication quality, and the transmission quality of the downlink signal meeting the set condition means that the at least one parameter used to indicate the communication quality meets the set condition, such as The signal strength is greater than the set threshold.

Step 203, using the selected antenna to send a downlink signal.

Using at least one selected indoor antenna to send a downlink signal to the terminal.

When the number of antennas determined in step 202 is multiple, after step 202 and before step 203, the method further includes step 202':

Step 202', weighting the amplitude and phase of the downlink signal to be transmitted.

This step specifically includes, for each selected indoor antenna, weighting the amplitude and phase of the downlink signal to be sent in the antenna port of the indoor antenna, and forming a beam offset after the weighted downlink signal to be sent so that the indoor The interference value between antennas is less than the threshold.

Through step 202', the interference between antennas can be reduced, and the solution of this step can further enhance the coverage quality of uplink signals in a specific direction.

Embodiment five,

Embodiment 5 of the present invention provides a downlink signal processing device, which is applied to an indoor distribution system shared by multiple communication networks. The structural diagram of the device is shown in FIG. ,in:

The receiving unit 21 is used to receive the location information fed back by the terminal for the downlink transmission process of each communication network; the antenna determining unit 22 is used to determine the indoor antenna whose coverage includes the location information, and select the indoor antenna from the determined indoor antenna. At the location indicated by the location information, there is at least one indoor antenna whose transmission quality of the downlink signal satisfies the set condition; the sending unit 23 is configured to send the downlink signal to the terminal using the selected indoor antenna.

The device also includes an adjustment unit 24:

The adjustment unit 24 is used to weight the amplitude and phase of the downlink signal to be sent in the antenna port of the indoor antenna for each selected indoor antenna when the number of selected indoor antennas is multiple, and the amplitude and phase of the downlink signal to be sent After the downlink signal is weighted and the beam offset is formed, the interference value between the indoor antennas transmitting the downlink signal is less than a threshold.

The sending unit 23 is specifically configured to use the selected indoor antenna to send the amplitude- and phase-weighted downlink signal.

Embodiment six,

Embodiment 6 of the present invention provides a downlink signal processing method, which is applied to an indoor distribution system shared by multiple communication networks. The step flow of the method is shown in Figure 6, and specifically includes the following steps:

Step 301, receiving location information fed back by the terminal.

Similar to Embodiment 4 of the present invention, when a communication network element, such as a base station, needs to send a downlink signal to a terminal, it also needs to communicate with the terminal to receive location information fed back by the terminal, so as to determine the location of the terminal.

Step 302. Weight the amplitude and phase of the downlink signal.

For each of the multiple indoor antennas used to transmit downlink signals to the terminal, weight the amplitude and phase of the downlink signal to be sent in the antenna port, and the indoor antenna that sends the weighted downlink signal is in the The transmission quality of the downlink signal at the location satisfies a set condition.

For example, after weighting the downlink signal to be sent, the interference value of the indoor antenna at the position is smaller than a threshold or the downlink signal strength in a specific direction is larger than a set value.

Step 303, sending the adjusted downlink signal.

The multiple indoor antennas are used to transmit amplitude- and phase-weighted downlink signals.

Embodiment seven,

Embodiment 7 of the present invention provides a downlink signal processing device, which is applied to an indoor distribution system shared by multiple communication networks. The structural diagram of the device is shown in FIG. 7 , and specifically includes a receiving unit 31, an adjusting unit 32, and a sending unit 33 in:

The receiving unit 31 is used to receive the position information fed back by the terminal for each type of downlink transmission process of the communication network; the adjustment unit 32 is used to adjust the amplitude of the downlink signal to be sent in the antenna port for each indoor antenna among the multiple indoor antennas Weighting with the phase, the transmission quality of the downlink signal at the position indicated by the position information of the indoor antenna that sends the weighted downlink signal meets the set condition; the sending unit 33 is used to use the multiple indoor antennas to send Downlink signal weighted by amplitude and phase.

The technical solutions provided by Embodiment 4 to Embodiment 7 of the present invention will be described in detail below through a specific example.

Embodiment eight,

Embodiment 8 of the present invention is a specific example of using the downlink signal processing equipment provided in Embodiment 5 and Embodiment 7 of the present invention to implement the corresponding downlink signal processing methods provided in Embodiment 4 and Embodiment 6 of the present invention. Embodiment 8 of the present invention provides The system architecture is shown in Figure 3. The system architecture is applicable to a distributed system shared by various communication networks, and the communication network may be any communication network such as GSM, CDMA, WCDMA, TD-SCDMA, LTE and WLAN.

When the network element of the communication system, such as the downlink signal sent by the TD-SCDMA base station needs to be covered indoors, the downlink signal sent by the TD-SCDMA base station can be realized through multiple antennas through the reverse process of the uplink signal transmission of the TD-SCDMA terminal. Indoor coverage.

As shown in Figure 3, the antenna used to transmit the downlink signal sent by the TD-SCDMA base station is the same as the antenna used to transmit the uplink signal sent by the TD-SCDMA terminal, and both are one of the dual-polarized antenna radiating node 1 in area A Vertically polarized antenna element and 1 horizontally polarized antenna element.

The downlink signal sent by the TD-SCDMA base station is divided into two channels, and the downlink coverage is realized through one vertically polarized antenna element and one horizontally polarized antenna element.

Preferably, the coverage quality of the downlink signal can be improved by at least one of the following two methods:

The first method is to select an antenna subset with the best downlink signal transmission quality through the antenna selection method, and transmit the downlink signal to the terminal through the antennas in the selected antenna subset.

Specifically, before the base station sends a downlink signal to the terminal, it can interact with the terminal, and use the feedback information sent by the terminal to determine the location of the terminal, so as to determine which antennas to choose to send the downlink signal will make the downlink signal transmission quality of the terminal the best. excellent. For example, the antennas that can be used to send downlink signals are antenna 1 and antenna 2 respectively. According to the determined terminal location, it is determined that using antenna 1 to send downlink signals will make the downlink coverage quality of the terminal optimal, then antenna 1 can be used to transmit downlink signals. Send a downlink signal to the terminal.

The first method can effectively improve the coverage effect of the downlink signal, expand the coverage of the downlink signal of the communication system, and overcome the problem of weakened high-frequency electromagnetic wave penetration ability during the downlink transmission of the signal.

The second type is to weight the amplitude and phase of the downlink signal transmitted in each antenna port when the downlink signal is transmitted through at least two antennas.

Specifically, when multiple antennas are determined for the base station to perform downlink communication with the terminal, before the base station sends downlink signals to the terminal, the base station can interact with the terminal, and use the feedback information sent by the terminal to determine the location of the terminal, thereby determining Determine the direction of useful signals and interference signals that the terminal can receive, and weight the amplitude and phase of the downlink signal transmitted in each antenna port (one antenna port corresponds to one antenna), and the weighted and superimposed downlink signal that the terminal can receive The signal in the direction of the useful signal is stronger (greater than the set first threshold value), and the signal in the direction of the interference signal is weaker (less than the set second threshold value).

The at least two antennas in the second method may be the antennas in the antenna subset selected by the first method, or may be randomly selected antennas that can be used for communication between the base station and the terminal.

The second method can form antenna beam offsets, enhance the coverage quality of downlink coverage blind spots in the traditional downlink transmission process, reduce coverage in areas that do not need coverage or in interference directions, and effectively improve network coverage.

In particular, for the LTE system and the WLAN system, when a terminal using the LTE system or WLAN system transmits uplink signals or receives downlink signals, and uses dual-polarized antennas to receive and transmit LTE signals or WLAN signals, one vertical polarization When the antenna element and a horizontally polarized antenna element are integrated together to receive and transmit LTE signals or WLAN signals, since the dual-polarized antenna meets the characteristics of low correlation, the dual-polarized antenna can be directly used as a MIMO antenna. While improving the uplink and downlink coverage quality of the antenna, the uplink and downlink data transmission rate of the antenna is further improved.

Through the technical solutions provided by Embodiment 1 to Embodiment 8 of the present invention, in the indoor distribution system shared by multiple communication networks, the communication network can be any communication network such as GSM, CDMA, WCDMA, TD-SCDMA, LTE, and WLAN. For each communication network, not only the uplink coverage quality of its signal can be enhanced, but also the downlink coverage quality of its signal can be enhanced to a certain extent, and when the uplink signal or downlink signal to be transmitted belongs to the LTE or WLAN system, The transmission rate of uplink or downlink data can also be improved by using MIMO antenna technology by using dual-polarized antennas.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (6)

1. A downlink signal processing method, which is applied in the shared indoor distribution system of multiple communication networks, is characterized in that the method comprises: For the downlink transmission process of each communication network, receive the location information fed back by the terminal; Determine the indoor antenna whose coverage includes the location information, and select at least one indoor antenna whose transmission quality of the downlink signal satisfies the set condition at the location indicated by the location information from the determined indoor antennas; Send a downlink signal to the terminal by using the selected indoor antenna. 2. The method according to claim 1, wherein when the number of selected indoor antennas is multiple, and before sending downlink signals to the terminal, the method further comprises: For each selected indoor antenna, weight the amplitude and phase of the downlink signal to be sent in the antenna port of the indoor antenna, and form a beam offset when the downlink signal to be sent is weighted, and transmit the downlink signal indoor The interference value between the antennas is less than the threshold; Using the selected indoor antenna to send a downlink signal to the terminal, specifically including: The selected indoor antenna is used to transmit the amplitude- and phase-weighted downlink signal. 3. A downlink signal processing device, which is applied to an indoor distribution system shared by multiple communication networks, is characterized in that the device includes: The receiving unit is configured to receive the location information fed back by the terminal for each downlink transmission process of the communication network; An antenna determining unit, configured to determine an indoor antenna whose coverage includes the location information, and select from the determined indoor antennas at the location indicated by the location information, the transmission quality of the downlink signal satisfies at least one of the set conditions root indoor antenna; a sending unit, configured to send a downlink signal to the terminal by using the selected indoor antenna. 4. The device of claim 3, further comprising: The adjustment unit is configured to weight the amplitude and phase of the downlink signal to be sent in the antenna port of the indoor antenna for each selected indoor antenna when the number of selected indoor antennas is multiple, and the to-be-sent After the downlink signal is weighted and the beam offset is formed, the interference value between the indoor antennas transmitting the downlink signal is less than a threshold; The sending unit is specifically configured to use the selected indoor antenna to send the amplitude- and phase-weighted downlink signal. 5. A downlink signal processing method, which is applied in an indoor distribution system shared by multiple communication networks, is characterized in that the method comprises: For the downlink transmission process of each communication network, receive the location information fed back by the terminal; For each of the multiple indoor antennas, weight the amplitude and phase of the downlink signal to be sent in the antenna port, and send the weighted downlink signal The indoor antenna at the position indicated by the position information The transmission quality of the downlink signal meets the set conditions; The multiple indoor antennas are used to transmit amplitude- and phase-weighted downlink signals. 6. A downlink signal processing device, which is applied to an indoor distribution system shared by multiple communication networks, is characterized in that the device includes: The receiving unit is configured to receive the location information fed back by the terminal for each downlink transmission process of the communication network; The adjustment unit is configured to weight the amplitude and phase of the downlink signal to be sent in the antenna port for each indoor antenna among the multiple indoor antennas, and the indoor antenna that sends the weighted downlink signal is located in the location information. The transmission quality of the downlink signal at the indicated position satisfies the set condition; The sending unit is configured to use the plurality of indoor antennas to send amplitude- and phase-weighted downlink signals.