WO2018068668A1

WO2018068668A1 - Antenna rollback method, and base station

Info

Publication number: WO2018068668A1
Application number: PCT/CN2017/104392
Authority: WO
Inventors: 杨召青
Original assignee: 华为技术有限公司
Priority date: 2016-10-14
Filing date: 2017-09-29
Publication date: 2018-04-19
Also published as: CN106533515A; CN106533515B

Abstract

The present invention relates to the field of wireless communications, and specifically relates to an antenna rollback method, and a base station. The method comprises: a base station determining a coverage level of a terminal according to uplink information sent by the terminal; the base station determining, according to the coverage level, the number of antennas used for sending data to the terminal, different coverage levels corresponding to different numbers of antennas; and the base station using the antennas of this number to send information to the terminal. In the embodiments of the present invention, since a base station no longer always uses the same number of antennas to perform rollback when sending downlink information to terminals within a coverage range, it can reduce interference in a network, and with regard to a terminal using a small number of antennas for receiving, the consumption of a terminal in a network can be reduced because of the decrease in demodulation times.

Description

Antenna fallback method and base station

This application claims priority to Chinese Patent Application No. 201610899492.1, entitled "An Antenna Fallback Method and Base Station", filed on October 14, 2016, the entire contents of which is incorporated herein by reference. .

Technical field

The present invention relates to the field of wireless communications, and in particular, to an antenna fallback method and a base station.

Background technique

The outstanding feature of wireless communication technology is that the signal propagation environment is complex. There are Co-Channel Interference (CCI), Multiple Access Interference (MAI), Inter-symbol Interference (ISI) and many more in the transmission process. The effect of path fading, so how to transmit large-capacity, high-rate, high-accuracy wireless data services on a limited spectrum of resources under the premise of these interferences is an urgent problem to be solved in wireless communication systems.

One of the current methods is to use multi-antenna technology, which can only process signals in the time domain, frequency domain and code domain with respect to single antenna technology. Multi-antenna technology can also process spatial information of signals, that is, process signals. In addition to the time domain and the frequency domain, the airspace can be combined, for example, by designing multiple antennas into an antenna array to improve spectrum utilization and power gain, thereby effectively increasing system capacity and enhancing system performance. It suppresses co-channel interference and multiple-site interference and resists multipath fading.

However, in the actual signal transmission process, the power gain effect can be achieved by the multi-antenna technology in the low-rate scenario, and the downlink coverage can be enhanced, but the downlink network interference is also deteriorated, so that the terminal receiving the signal needs to repeat the demodulation and repetition. The data increases the power consumption of some terminals in the network.

Summary of the invention

The embodiments of the present invention provide an antenna fallback method and a base station to solve the problem of increased intra-network interference and increased power consumption of terminals in the network due to power gain in the multi-antenna technology in the existing low-speed scenario.

In view of this, the first aspect of the present invention provides an antenna fallback method, in which a base station can set different antenna numbers according to different coverage levels of terminals in different areas of its coverage, and the base station receives uplinks sent by the terminal. After the information, the uplink information is first determined to determine the coverage level of the terminal, and then the number of antennas that send downlink information to the terminal is determined according to the relationship between the preset coverage level and the number of antennas, and finally the downlink information is transmitted through the number of antennas.

It can be seen that since the base station sends downlink information to the terminals in the coverage area, the same number of antennas are used to perform the back-off. For example, the antenna system composed of 4 antennas does not transmit 4 antennas for all coverage levels. Rather, it varies according to the coverage level. For example, it can transmit with 4 antennas for one coverage level and 2 antennas for another coverage level. This method can reduce intra-network interference and receive for a small number of antennas. The terminal can also reduce the consumption of the terminal in the network due to the reduction in the number of demodulation.

In some embodiments, the distances of the different areas in the coverage of the base station are different from the base station, and the base station determines that the coverage level of the terminal not only passes the uplink information but also the distance from the base station through the area, so the coverage level of the area is The height is determined by the distance from the area to the base station and the uplink information, such as the area close to the base station and according to the uplink The area where the sensitivity is high is determined to be the area with a high coverage level, and the area far from the base station and the lower sensitivity according to the uplink information is determined to be the area with a low coverage level. In the above manner, the division of the coverage level can be more precise.

In some embodiments, a smaller number of antennas are used for transmission in areas with higher coverage levels, while a larger number of antennas are used for transmission in areas with low coverage levels. For example, the coverage level includes a first coverage level and a second coverage level lower than the first coverage level, where the number of antennas of the area of the second coverage level is greater than the number of antennas of the area of the first coverage level, thereby different coverage The level uses different numbers of antennas to achieve the purpose of reducing interference, and the terminal in the area with high coverage level can reduce power consumption by reducing the number of demodulation due to the small number of antennas used by the base station.

In some embodiments, the uplink information includes the downlink quality parameter acquired by the terminal or the uplink quality parameter detected by the terminal. The downlink quality parameter or the uplink quality parameter can be used to know the signal reception situation of the current location of the terminal, such as channel quality, etc., and the coverage level can be accurately divided.

In some embodiments, the downlink quality parameter or the downlink quality parameter includes a Signal to Interference plus Noise Ratio (SINR), a Reference Signal Receiving Power (RSRP), and a Channel Quality Indicator (CQI). At least one of Channel Quality Indicators. The current channel quality can be judged by at least one of the three parameters, so that the coverage level of the current terminal can be accurately determined.

In some embodiments, before determining the coverage level of the terminal according to the uplink information sent by the terminal, the base station determines the location of the terminal first, so as to determine the specific area of the terminal within the coverage of the base station.

In some embodiments, the base station first detects the transmission scenario before determining the coverage level of the terminal, and performs subsequent operations only if the non-high rate is detected.

In some embodiments, the determining, by the base station, the number of antennas for transmitting information to the terminal according to the coverage level may be that the base station first determines the user category according to the coverage level, and the relationship may be preset, such as the user category may include the near-point user and Far from the user, and the coverage level may include a first coverage level and a second coverage level higher than the first coverage level, where the first coverage level may correspond to a near-point user, and the second coverage level may correspond to a far-end user, and Near-point users can use a smaller number of antennas, and for remote users, a larger number of antennas can be used.

In some embodiments, the base station also schedules time-division for different user types. Can reduce interference within the network.

In some embodiments, the user type includes a near-point user type and a far-end user type, and the base station may perform scheduling by using a frequency-division or time-division Inter-Cell Interference Coordination (ICIC) algorithm for the far-end user, thereby reducing the far distance. Point the interference between users.

A second aspect of the present invention provides a base station, where the base station includes a processing module and a transceiver module. The processing module is configured to determine a coverage level of the terminal according to uplink information sent by the terminal, that is, the determination of the coverage level is performed by After the uplink information sent by the terminal is determined, the processing module allocates the number of antennas according to the coverage level, and then the transceiver module sends the information to the terminal by using the set number of antennas.

In some embodiments, the distance between the different areas in the coverage of the base station is different from the base station, and the processing module determines that the coverage level of the terminal not only passes the uplink information but also the distance from the base station through the area, so the coverage level of the area is The height of the area is determined by the distance from the area to the base station and the uplink information, such as the area close to the base station and according to the upper The area information is determined to be an area with a high coverage level, and is determined to be an area with a low coverage level when the area is far from the base station and the sensitivity is low according to the uplink information. In the above manner, the division of the coverage level can be more precise.

In some embodiments, the downlink quality parameter or the downlink quality parameter includes at least one of SINR, RSRP, and CQI. The current channel quality can be judged by at least one of the three parameters, so that the coverage level of the current terminal can be accurately determined.

In some embodiments, before the processing module determines the coverage level of the terminal according to the uplink information sent by the terminal, the processing module first determines the location of the terminal, so as to determine a specific area of the terminal within the coverage of the base station.

In some embodiments, before the processing module determines the coverage level of the terminal, the processing module first detects the transmission scenario, and only performs a subsequent operation if it detects a non-high rate.

In some embodiments, the processing module determines, according to the coverage level, the number of antennas used to send information to the terminal, which may be determined by the base station first according to the coverage level, and the relationship may be preset, such as the user category may include a near-point user. And the remote user, and the coverage level may include a first coverage level and a second coverage level higher than the first coverage level, where the first coverage level may correspond to the near-point user, and the second coverage level may correspond to the far-end user, and For near-point users, a smaller number of antennas can be used, and for remote users, a larger number of antennas can be used.

In some embodiments, the processing module also schedules time-division for different user types. Can reduce interference within the network.

In some embodiments, the user type includes a near-point user type and a far-point user type, and the processing module can schedule the far-point user to adopt a frequency division or time division ICIC algorithm, thereby reducing interference between the remote users.

DRAWINGS

1 is a schematic diagram of downlink information transmission in the present multi-antenna system;

2 is a diagram of an embodiment of an antenna fallback method according to an embodiment of the present invention;

3 is a diagram showing another embodiment of an antenna fallback method according to an embodiment of the present invention;

4 is a diagram showing another embodiment of an antenna fallback method according to an embodiment of the present invention;

FIG. 5 is a diagram showing another embodiment of an antenna fallback method according to an embodiment of the present invention; FIG.

6 is a diagram showing an embodiment of a base station according to an embodiment of the present invention;

FIG. 7 is a diagram showing another embodiment of a base station according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is an embodiment of the invention, but not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of the present invention.

The details are described below separately.

The terms "first", "second", "third", "fourth", etc. (if present) in the specification and claims of the present invention and the above figures are used to distinguish similar objects without being used for Describe a specific order or order. It is to be understood that the data so used may be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than what is illustrated or described herein.

The power gain that the multi-antenna system function can bring is the gain obtained by the transmitter by increasing the transmit power. When multi-antenna transmission is employed, for example, since there are n transmission channels, the total transmission power at this time is equivalent to n times that of the single antenna transmission, and a power gain of 10 lg (n) dB can be obtained at this time. It can also increase the transmit power when transmitting a single antenna, but the requirements for the power amplifier will increase. Since the cost and power of the power amplifier are not linearly increased, the effect of using multi-antenna transmission to obtain power gain is higher than that of improving single antenna transmission power. As shown in FIG. 1 , FIG. 1 is a schematic diagram of a downlink of a multi-antenna system. In a scenario where a downlink antenna is configured in a 4-antenna scenario, the base station uses a 4-antenna method to transmit data, and the terminal uses diversity reception to achieve power gain.

Multi-antenna system application in the IoT application scenario mainly targeting low-rate, deep coverage, low-power, and large connections may cause problems due to this power gain. Because the power consumption requirements of the terminal in the IoT scenario are as low as possible, Network interference also has strict requirements, and multiple antennas inevitably require terminals in the network to be demodulated multiple times, thereby increasing power consumption, and the gain between the terminals in the network is increased due to the gain of power.

In order to solve the above problem, the embodiment of the present invention adopts an antenna fallback method. Referring to FIG. 2, FIG. 2 is a schematic diagram of an embodiment of an antenna fallback method according to an embodiment of the present invention. The method may include:

201. The base station determines, according to uplink information sent by the terminal, a coverage level of the terminal.

In a multi-antenna scenario, the coverage of the terminal entering the base station will send uplink information to the base station, or the terminal covered by the base station will periodically send uplink information to the base station, so that the base station can know the situation of the terminal in real time.

The determining the coverage level is based on the uplink information sent by the terminal, and the uplink information sent by the terminal may be the downlink quality parameter acquired by the terminal or the uplink quality parameter detected by the terminal, and the base station may enable the base station according to the uplink quality parameter or the downlink quality parameter. Judging the coverage level of the terminal.

Optionally, the uplink quality parameter or the downlink quality parameter includes at least one of SINR, RSRP, and CQI. It can be seen that the uplink information reported by the terminal may be at least one of SINR, RSRP, and CQI. The SINR is the ratio of the strength of the received useful signal to the strength of the received interference signal (noise and interference), which can reflect the quality of the signal; RSRP is the 4G network that carries the reference signal within a certain symbol. Received on all resource particles The average value of the signal power is an important indicator to measure the wireless network coverage of the system. RSRP is an absolute value indicating the strength of the received signal, which can reflect the distance of the mobile station from the base station to a certain extent. The main factors affecting the CQI value are the signal strength, signal-to-noise ratio and bit error rate, which can reflect the current channel quality. .

202. The base station determines, according to a coverage level, a number of antennas used to send information to the terminal.

The different coverage levels may correspond to different antenna numbers. The correspondence may be stored in the base station in advance. After determining the coverage level of the terminal, the base station may determine the corresponding number of antennas according to the coverage level.

Optionally, the step 202 may further include:

Determining, by the base station, a user category of the terminal according to a coverage level;

The base station determines the number of antennas for transmitting information to the terminal based on the user category.

It can be seen that the process of determining the number of antennas used by the base station to send information to the terminal can be generally divided into two steps. First, the user category of the terminal is determined according to the coverage level, and the user category can be based on the distance of the terminal from the base station. Dividing, for example, covering a high-level corresponding to a near-point user with a low coverage level; after determining whether the user category of the terminal is a near-point user or a far-end user, the number of antennas can be determined according to a preset correspondence relationship. For example, for a far-end user, a larger number of antennas can be used to transmit information, and for a near-point user, a smaller number of antennas can be used to transmit information, so that the power consumption of the near-point user can be reduced.

It should be noted that the classification of the user type may be divided into two types according to the coverage level. For example, the user type may be divided into three types: a near-point user, a mid-point user, and a far-end user. Point users, closer users, midpoint users, farther users, and far-end users have five levels. In actual cases, they can be different depending on the coverage of the base station and the actual communication capacity that can be received. Not limited.

In addition, in the case where the total number of antennas is fixed, the ratio of the number of antennas set for the near-point user, the mid-point user, and the far-end user is not necessarily the same. For example, the antenna system is a 4-antenna system, and a single antenna can be set for the near-point user. The midpoint user sets 2 antennas and the far point user sets 4 antennas. Of course, it is also possible to set 2 antennas for the near-point user, 3 antennas for the midpoint user, and 4 antennas for the far-end user. The specific setting ratio varies according to the actual situation. This is not a limitation.

203. The base station sends information to the terminal by using the number of antennas.

It can be seen that after the number of antennas is determined, information is transmitted according to the corresponding number of antennas.

In addition, time-division scheduling is performed for terminals of different user types in the network to reduce interference between terminals in the network. In addition, for terminals whose user types are far-end users, frequency division or time-division ICIC is also used for scheduling. Among them, ICIC controls inter-cell interference by managing radio resources, and is a multi-cell radio resource management function that considers resource usage and load in a plurality of cells. Specifically, the ICIC limits the use of radio resources in each cell in an inter-cell coordinated manner, including limiting which time-frequency resources are available, or limiting the transmit power on certain time-frequency resources. This can reduce the interference between the remote users.

It should be noted that, if the terminal is in a motion state, the terminal needs to periodically report the downlink quality parameter or periodically detect the uplink quality parameter, and the base station dynamically adjusts the coverage level according to the uplink quality parameter or the downlink quality parameter, that is, is different. The coverage level of the same terminal at the location may change.

It can be seen that, in the above manner, since the base station sends downlink information to the terminals in the coverage area, the same number of antennas are used to perform the backoff. For example, the antenna system composed of 4 antennas does not adopt 4 for all coverage levels. The antenna is transmitted, but it varies according to the coverage level. For example, it can be transmitted with 4 antennas for one coverage level, but Two antennas are used for transmission at another coverage level, which can reduce intra-network interference, and can reduce the consumption of terminals in the network due to the reduction in the number of demodulation for terminals that receive with a small number of antennas.

The antenna fallback method of the embodiment of the present invention is described above. The following describes the method in a practical example. Referring to FIG. 3, FIG. 3 is another embodiment of an antenna fallback method according to an embodiment of the present invention, where A base station and three UEs are included. The number of antennas of the base station in the multi-antenna system is four, and the user type is divided into a near-point user, a mid-point user, and a far-end user according to the distance from the base station. :

301. The base station determines whether the current cell is a high-speed scenario. If yes, the antenna backoff method of the embodiment shown in FIG. 2 is not performed. If not, step 302 is performed.

302. The terminal reports, to the base station, an uplink quality parameter or a downlink quality parameter that is obtained.

303. The base station receives and determines, according to the uplink quality parameter or the obtained downlink quality parameter, the user type of the terminal. If the user type is determined to be a near-point user, step 304 is performed. If the user type is determined to be a mid-point user, step 305 is performed. If it is determined that the user type is a remote user, step 306 is performed.

The user type is divided according to the coverage level.

304. The base station sends information to the near-user type terminal in a single antenna manner.

305. The base station sends information to the midpoint user type terminal in a dual antenna manner.

306. The base station sends information to the terminal of the remote user type in a four-antenna manner.

307. The base station schedules different user types according to different times.

The scheduling in step 307 is directed to the scheduling of the near-point user, the mid-point user, and the far-end user, and the frequency-division or time-division ICIC may also be performed for the far-end user to reduce interference between the remote users.

4 and FIG. 5 are transmission diagrams of downlink information before and after the embodiment shown in FIG. 3, wherein 1T represents a single antenna mode, 2T represents a dual antenna mode, and 4T represents a 4-antenna mode. It can be seen that compared with the near-point user, Figure 5 adopts the single-antenna method, while Figure 4 uses the four-antenna method. Compared with the mid-point user, Figure 5 uses the dual-antenna method, and Figure 4 uses the four-antenna method. And Figure 4 uses a four-antenna approach.

The antenna back-off method of the embodiment of the present invention is described above. The base station of the embodiment of the present invention is described below. Referring to FIG. 6, FIG. 6 is a block diagram of an embodiment of the present invention. The base station 6 may include:

The processing module 601 is configured to determine, according to uplink information sent by the terminal, a coverage level of the terminal.

Optionally, the distance between the different areas in the coverage of the base station is different from the distance from the base station, and the processing module 601 is specifically configured to use the distance from the base station according to the coverage area and the uplink information sent by the terminal. The coverage level of the area is determined.

Optionally, the coverage level includes a first coverage level and a second coverage level lower than the first coverage level, where the number of antennas of the area of the second coverage level is greater than the number of antennas of the area of the first coverage level. For a detailed description of the coverage, refer to the description of the step 201 and the step 202 in the embodiment shown in FIG. 2, and details are not described herein again.

Optionally, the uplink information sent by the terminal includes a downlink quality parameter that is acquired by the terminal or an uplink quality parameter that is detected by the terminal. In this case, the processing module 601 is specifically configured to:

Determining the coverage level of the terminal according to the downlink quality parameter acquired by the terminal or the uplink quality parameter detected by the terminal.

Optionally, the uplink quality parameter or the downlink quality parameter includes at least one of SINR, RSRP, and CQI. Kind. For the description of the SINR, the RSRP, and the CQI, refer to the description of the step 201 and the step 202 in the embodiment shown in FIG. 2, and details are not described herein again.

The processing module 601 is further configured to determine, according to the coverage level, the number of antennas used to send data to the terminal.

Where different coverage levels correspond to different antenna numbers;

The transceiver module 602 is configured to send information to the terminal by using the number of antennas.

Optionally, before the processing module 601 determines the coverage level, the processing module 601 is further configured to determine an area where the terminal is located within its own coverage. Before the processing module 601 determines the coverage level of the terminal according to the uplink information sent by the terminal, the processing module 601 determines the location of the terminal first, so as to determine the specific area of the terminal within the coverage of the base station.

Optionally, the processing module 601 is further configured to determine that the transmission rate in the coverage of the base station is a non-high rate. Before the processing module 601 determines the coverage level of the terminal, the processing module 601 first detects the transmission scenario, and only performs a subsequent operation if the non-high rate is detected.

Optionally, the processing module 601 is configured to determine a user category of the terminal according to a coverage level, and determine, according to the user category, a number of antennas used to send information to the terminal.

Optionally, the processing module 601 is further configured to:

Schedule different user types according to different times.

Optionally, the user type includes a near-point user and a far-end user, and the processing module 601 is further configured to perform scheduling by using a frequency division or time division interference coordination algorithm ICIC for the far-end user in the far-point region. For the user category and the number of antennas corresponding to different categories, refer to the description of step 201 and step 202 in the embodiment shown in FIG. 2, and details are not described herein again.

The following is a description of the structure of a base station in the embodiment of the present invention. Referring to FIG. 7, FIG. 7 is a diagram of an embodiment of a base station according to an embodiment of the present invention, where the base station 7 can include at least one processor 701 each connected to a bus. At least one transceiver 702 and memory 703, the base station according to an embodiment of the present invention may have more or less components than those shown in FIG. 7, may combine two or more components, or may have different components Configuration or arrangement, various components may be implemented in hardware, software, or a combination of hardware and software, including one or more signal processing and/or application specific integrated circuits.

Specifically, for the embodiment shown in FIG. 6, the processor 701 can implement the function of the processing module 601 in the embodiment shown in FIG. 6, and the transceiver 702 can implement the transceiver module in the embodiment shown in FIG. The function of 602 is used to store instructions and data to be executed by the processor 701, and the processor 701 is configured to execute the instructions in the memory to determine the number of antennas according to the coverage level, and the number of antennas is adopted by the transceiver 702. The antenna transmits information.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separate, displayed as a unit The components may or may not be physical units, ie may be located in one place or may be distributed over multiple network elements. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the embodiments are modified, or some of the technical features are replaced by equivalents; and the modifications or substitutions do not deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

An antenna fallback method is characterized by:

The base station determines the coverage level of the terminal according to the uplink information sent by the terminal;

The base station determines, according to the coverage level, the number of antennas used to send data to the terminal, and different coverage levels correspond to different antenna numbers;

The base station transmits information to the terminal by using the number of antennas.
The antenna fallback method according to claim 1, wherein the distance between the different areas in the coverage of the base station is different from the distance of the base station, and the base station determines, according to the uplink information sent by the terminal, the terminal Coverage levels include:

The base station determines a coverage level of the area according to a distance of the coverage area from the base station and uplink information sent by the terminal.
The antenna fallback method according to claim 2, wherein the coverage level comprises a first coverage level and a second coverage level lower than the first coverage level, and an antenna of the second coverage level region The number of antennas in the area greater than the first coverage level.
The antenna fallback method according to claim 1, wherein the uplink information sent by the terminal includes a downlink quality parameter acquired by the terminal or an uplink quality parameter detected by the terminal, and the base station sends the uplink quality parameter according to the terminal. The uplink information determines that the coverage level corresponding to the terminal includes:

The base station determines the coverage level of the terminal according to the downlink quality parameter acquired by the terminal or the uplink quality parameter detected by the terminal.
The antenna fallback method according to claim 4, wherein the uplink quality parameter or the downlink quality parameter comprises at least one of a signal to interference plus noise ratio SINR, a reference signal received power RSRP, and a channel quality indicator CQI. Kind.
The antenna fallback method according to claim 1, wherein the method further includes: before the determining, by the base station, the coverage level corresponding to the terminal according to the uplink information sent by the terminal, the method further includes:

The base station determines an area in which the terminal is located within its own coverage.
The antenna fallback method according to claim 1, wherein the method further includes: before the determining, by the base station, the coverage level corresponding to the terminal according to the uplink information sent by the terminal, the method further includes:

The base station determines that the transmission rate in the coverage of the base station is a non-high rate.
The antenna fallback method according to claim 1, wherein the determining, by the base station, the number of antennas for transmitting information to the terminal according to the coverage level comprises:

Determining, by the base station, a user category of the terminal according to a coverage level;

The base station determines an antenna number for transmitting information to the terminal according to the user category.
The antenna fallback method according to claim 8, wherein the method further comprises:

The base station schedules different user types according to different times.
The antenna fallback method according to claim 9, wherein the user type comprises a near-point user and a far-end user, and the base station uses a frequency division or time division interference coordination algorithm for a far-end user in a far-point region. ICIC performs scheduling.
A base station, comprising:

a processing module, configured to determine, according to uplink information sent by the terminal, a coverage level of the terminal;

The processing module is further configured to determine, according to the coverage level, the number of antennas used to send data to the terminal, where different coverage levels correspond to different antenna numbers;

And a transceiver module, configured to send information to the terminal by using the number of antennas.
The base station according to claim 11, wherein the different areas in the coverage of the base station are different from the base station, and the processing module is specifically configured to:

And determining, according to the distance between the coverage area and the uplink information sent by the terminal, the coverage level of the area.
The base station according to claim 12, wherein the coverage level comprises a first coverage level and a second coverage level lower than the first coverage level, wherein the number of antennas of the second coverage level is greater than The number of antennas in a coverage area.
The base station according to claim 11, wherein the uplink information sent by the terminal includes a downlink quality parameter acquired by the terminal or an uplink quality parameter detected by the terminal, and the processing module is specifically configured to:

Determining the coverage level of the terminal according to the downlink quality parameter acquired by the terminal or the uplink quality parameter detected by the terminal.
The base station according to claim 14, wherein the uplink quality parameter or the downlink quality parameter comprises at least one of a signal to interference plus noise ratio SINR, a reference signal received power RSRP, and a channel quality indicator CQI.
The base station according to claim 11, wherein the processing module is further configured to:

Determine the area where the terminal is located within its own coverage.
The base station according to claim 11, wherein the processing module is further configured to:

Determining that the transmission rate in the coverage of the base station is a non-high rate.
The base station according to claim 11, wherein the processing module is configured to:

Determining a user category of the terminal according to a coverage level;

A number of antennas for transmitting information to the terminal is determined according to the user category.
The base station according to claim 18, wherein the processing module is further configured to:

Schedule different user types according to different times.
The base station according to claim 19, wherein the user type comprises a near-point user and a far-end user, and the processing module is further configured to use frequency division or time-division interference coordination for a far-end user in the far-point area. The algorithm ICIC performs scheduling.