CN103874181B - A kind of is the method and apparatus of terminal distribution down channel - Google Patents

Abstract

The present invention discloses a method and equipment for allocating downlink channels for a terminal, the main content of which includes: when receiving the signal-to-noise ratio (SINR) information reported by the terminal, according to the ratio between the set SINR information and the transmission power of the downlink channel Correspondence, determining the transmit power of the downlink channel corresponding to the received SINR information reported by the terminal, and obtaining the downlink channel corresponding to the determined transmit power according to the set correspondence between the transmit power of the downlink channel and the identification information The identification information of the channel, and assign the downlink channel corresponding to the identification information to the terminal, so that the network side allocates a suitable downlink channel for the terminal according to the needs of the terminal, avoiding the downlink channel allocated for the terminal existing in the prior art The waste caused by the excessively high transmit power, and the targeted allocation of suitable downlink channels for terminals improves the utilization rate of downlink channel transmit power and meets the different requirements of multi-user terminals on the network.

Description

A method and device for allocating downlink channels to terminals

technical field

The present invention relates to the field of wireless communication, in particular to a method and equipment for allocating downlink channels to terminals.

Background technique

With the development of communication technology, the LTE system has become the trend of future network development. In the prior art, an equal power allocation mechanism is adopted for the downlink power allocation mode of the eNodeB base station in the LTE system, that is, the same power value is allocated to each RB resource in the PDSCH (Physical Dowlink Shared Channel, Physical Downlink Shared Channel) . As shown in Figure 1, it is a schematic diagram of the downlink power allocation of the eNodeB base station in the existing LTE system. Assuming that the available power resource for the eNodeB base station is 20W, and there are 100 RB resources in the downlink of the base station, then equal power is used In the allocation mechanism, the power value obtained by each RB resource is 200mW.

Since the LTE system adopts AMC (Adaptive Modulation and Coding, adaptive modulation and coding) technology, it has the ability of fast scheduling. Unlike the fast power control of the transmit power of the downlink channel in the 3G system, the downlink traffic channel Using the method of allocating the same transmit power for each channel resource, channel environment adaptation is mainly performed through AMC technology and scheduling technology, but this method is not suitable for any LTE deployment scenario for the following reasons:

In a typical indoor coverage scenario, based on the analysis of the downlink simulation results and test data of the eNodeB base station, it can be known that when the SINR (Signal to Inferterence plus Noise Ratio, signal-to-noise ratio) of the user terminal reaches 22.2dB, the PDSCH of the LTE system will Using the highest MCS level, when the SINR of the user terminal exceeds 22.2dB by increasing the transmit power, the LTE system still uses the highest MCS level, and the user rate will not increase. In this case, increasing the transmit power is more important for the terminal It will be meaningless to increase the service rate, but will cause a waste of power resources. For users with low SINR, increasing the transmit power can significantly improve the MCS level, thereby bringing about a significant increase in user rate. Therefore, the existing method of allocating the same transmit power for each channel resource is not an optimal power allocation scheme.

As shown in Table 1, it is a distribution table of RSRP (ReferenceSignalReceiving Power, reference signal receiving power) and user terminal SINR under the coverage of LTE indoor coverage system in a certain area:

Table 1

It can be seen from Table 1 that in various scenarios, by measuring the LTE indoor coverage system (RSRP>=-105dBm), it is found that the probability of the SINR distribution of the user terminal between 18.77dB and 29.16dB reaches 50%, that is, in In the LTE indoor coverage scenario, the SINR of the signal obtained by the user terminal in 50% of the area will exceed 18.77dB. The original equal power allocation method of the LTE system will cause a waste of power resources.

Therefore, in the existing LTE system, only a constant power method can be used to allocate transmission power for the downlink, but this method will cause the transmission power allocated to the user terminal with a better channel to exceed the transmission power required by itself, or the user terminal with a weaker channel The transmission power allocated by poor user terminals will not be able to meet their own needs. In this way, after the power allocation is performed in the LTE system in the prior art, the problem of low transmission power resource utilization occurs.

Contents of the invention

Embodiments of the present invention provide a method and device for adjusting transmission power of a downlink channel, which are used to solve the problem of low utilization of transmission power resources in the prior art after equal power allocation is performed in an LTE system.

A method for allocating a downlink channel to a terminal, comprising:

Receive the signal-to-noise ratio (SINR) information reported by the terminal;

According to the corresponding relationship between the set SINR information and the transmit power of the downlink channel, determine the transmit power of the downlink channel corresponding to the received SINR information reported by the terminal, and determine the transmit power of the downlink channel according to the set transmit power and the identification information. The corresponding relationship between, to obtain the identification information of the downlink channel corresponding to the determined transmission power;

Allocating the downlink channel corresponding to the identification information to the terminal.

A device for assigning a downlink channel to a terminal, comprising:

The receiving module is used to receive the signal-to-noise ratio SINR information reported by the terminal;

A determining module, configured to determine the transmit power of the downlink channel corresponding to the received SINR information reported by the terminal according to the corresponding relationship between the set SINR information and the transmit power of the downlink channel, and transmit the power of the downlink channel according to the set A correspondence relationship between power and identification information, obtaining the identification information of the downlink channel corresponding to the determined transmit power;

An allocating module, configured to allocate the downlink channel corresponding to the identification information to the terminal.

The beneficial effects of the present invention are as follows:

In the embodiment of the present invention, when the signal-to-noise ratio SINR information reported by the terminal is received, the downlink channel corresponding to the received SINR information reported by the terminal is determined according to the corresponding relationship between the set SINR information and the transmit power of the downlink channel The transmit power of the downlink channel, and according to the corresponding relationship between the set transmit power of the downlink channel and the identification information, obtain the identification information of the downlink channel corresponding to the determined transmission power, and allocate the downlink channel corresponding to the identification information to the The terminal, so that the network side allocates suitable downlink channels for the terminal according to the needs of the terminal, avoiding the waste caused by the excessive transmission power of the downlink channel allocated for the terminal in the prior art, and assigning the appropriate channel to the terminal in a targeted manner. The downlink channel improves the utilization rate of downlink channel transmission power, and meets the different requirements of multi-user terminals on the network.

Description of drawings

FIG. 1 is a schematic diagram of downlink power allocation of an eNodeB base station in an existing LTE system;

FIG. 2 is a flow chart of a method for allocating downlink channels for a terminal according to the present invention;

FIG. 3 is a flow chart of a method for allocating downlink channels to a terminal according to the present invention;

FIG. 4 is a schematic structural diagram of a device for allocating downlink channels to a terminal according to the present invention.

detailed description

In order to achieve the purpose of the present invention, an embodiment of the present invention provides a method and device for allocating downlink channels to a terminal. When receiving the signal-to-noise ratio (SINR) information reported by the terminal, according to the set SINR information and the transmission of the downlink channel Correspondence between powers, determining the transmit power of the downlink channel corresponding to the received SINR information reported by the terminal, and obtaining the determined transmit power according to the set correspondence between the transmit power of the downlink channel and the identification information The identification information of the downlink channel corresponding to the power, and the downlink channel corresponding to the identification information is allocated to the terminal, so that the network side allocates a suitable downlink channel for the terminal according to the needs of the terminal, avoiding the existing in the prior art. The waste caused by the excessively high transmission power of the allocated downlink channel, and the targeted allocation of suitable downlink channels to the terminal improves the utilization rate of the downlink channel transmission power, and meets the different requirements of multi-user terminals on the network.

Various embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in Figure 2, it is a flowchart of a method for assigning a downlink channel to a terminal according to the present invention, the method comprising:

Step 101: Receive SINR information reported by the terminal.

In step 101, when receiving the signal-to-noise ratio SINR information reported by the terminal, the network side can judge the channel power required by the terminal to perform services, and further determine the downlink transmit power required by the terminal.

Preferably, the network side performs the following operations before receiving the SINR information reported by the terminal:

First, the transmit power of the downlink channel required for each piece of SINR information is calculated.

Specifically, in the LTE system, when the terminal is affected by different noises, the required transmission power of the downlink channel is different, that is, the collected SINR information is different, and the required transmission power of the downlink channel is different, wherein: the higher the value of the SINR information The larger the value, the lower the required transmit power of the downlink channel.

Secondly, the corresponding relationship between the SINR information and the calculated transmit power of the downlink channel is established.

Specifically, the corresponding relationship between the SINR information and the transmit power of the downlink channel is locally stored on the network side, as shown in Table 2:

transmit power SINR information 50mW Not less than 28dB 200mW 18dB~28dB 355mW Not more than 18dB

Table 2

This ensures the real-time performance of frequency domain resource scheduling, breaks the principle of equal power allocation, is more suitable for the development of network systems, and improves the utilization rate of network resources.

Preferably, the network side performs the following operations before receiving the SINR information reported by the terminal:

First, divide the downlink channels into different groups according to the calculated transmit power of the downlink channels, wherein the transmit power of the downlink channels in each group is the same, and each group is assigned an identification information.

Specifically, the number of transmit powers determined according to the SINR information is counted, and the downlink channels of an eNodeB base station are divided according to the counted numbers, wherein the transmit power of the downlink channels in each group is the same, and each group is assigned an identification information , each group contains at least one downlink channel.

It should be noted that, according to the statistical quantity, the downlink channels of the base station may be evenly divided into groups of the quantity.

For example: the determined transmission power is 50mW, 200mW and 355mW, that is, there are 3 different transmission powers, and the number of downlink channels of an eNodeB base station is 99. According to the principle of balance, the downlink channels of an eNodeB base station are divided into 3 groups, and each group The number of downlink channels contained in is 33, then the identification information determined for the first group of downlink channels satisfies 3K; the identification information determined for the second group of downlink channels satisfies 3K+1; the identification information determined for the third group of downlink channels The information satisfies 3K+2, where K is a positive integer ranging from 0 to 32.

Second, determine the transmit power of each group of downlink channels.

For example: assume that the determined transmission power of the first group of downlink channels is 50mW; the determined transmission power of the second group of downlink channels is 200mW; the determined transmission power of the third group of downlink channels is 355mW.

Thirdly, establish a corresponding relationship between the transmission power and the identification information of the downlink channel.

Specifically, the corresponding relationship between the transmit power and the identification information of the downlink channel is stored locally on the network side, as shown in Table 3:

transmit power Identification information of the downlink channel 50mW 3K 200mW 3K+1 355mW 3K+2

table 3

Preferably, in combination with Table 2 and Table 3, the identification information of the downlink channel, the signal-to-noise ratio SINR information and the corresponding relationship between the transmission power can be stored locally on the network side, as shown in Table 4:

transmit power Identification information of the downlink channel Signal-to-noise ratio SINR information 50mW 3K Not less than 28dB 200mW 3K+1 18dB~28dB 355mW 3K+2 Not more than 18dB

Table 4

Step 102: Determine the transmit power of the downlink channel corresponding to the received SINR information reported by the terminal according to the set correspondence between the SINR information and the transmit power of the downlink channel.

Specifically, in step 102, after receiving the signal-to-noise ratio SINR information reported by the terminal, determine the signal-to-noise ratio SINR information reported by the terminal according to the corresponding relationship between the set SINR information and the transmit power of the downlink channel The transmit power of the corresponding downlink channel.

It should be noted that after receiving the signal-to-noise ratio SINR information reported by the terminal, the received SINR information is compared with the locally stored SINR information, and the interval of the locally stored SINR information to which the received SINR information belongs is determined; according to Search the transmit power of the corresponding downlink channel in the determined interval, and use the found transmit power of the downlink channel as the transmit power of the downlink channel required by the terminal.

Step 103: Obtain the identification information of the downlink channel corresponding to the determined transmission power according to the corresponding relationship between the set transmission power of the downlink channel and the identification information.

Specifically, in step 103, the identification information of the downlink channel corresponding to the transmission power of the downlink signal obtained in step 102 is determined according to the locally pre-stored correspondence between the transmission power of the downlink channel and the identification information.

Although there is only one identification information of the determined downlink channel, there is at least one determined number of downlink channels.

Therefore, for all the downlink channels corresponding to the identification information, it is necessary to select an idle downlink channel to serve the terminal, so that the effectively used network resources also improve the execution efficiency of the terminal service.

Preferably, before selecting the downlink channel, the method further includes:

The first step is to determine the utilization rate of the downlink channel corresponding to the identification information.

Specifically, the running downlink channel is determined according to the running information of the current downlink channel, and the utilization ratio of the downlink channel in the identification information is obtained according to the quantity information of the downlink channel corresponding to the identification information.

The second step is to judge whether the utilization rate of the downlink channel corresponding to the identification information is greater than a set value.

In the third step, when it is judged that the utilization ratio is greater than the set value, other identification information except the determined identification information is selected.

Wherein, the transmission power corresponding to the selected other identification information is greater than the transmission power corresponding to the determined identification information.

The set value may be determined according to empirical values, or may be determined according to actual needs, which is not limited here.

When the utilization rate of the downlink channel corresponding to the identification information is greater than the set value, in order to reduce the pressure on the network and improve the speed of terminal service execution, it is recommended to select other identification information except the identified identification information, but the selected The transmission power of the downlink channel corresponding to other identification information needs to be higher than the transmission power of the downlink channel corresponding to the determined identification information, which can not only reduce the service execution pressure of the downlink channel corresponding to the determined transmission power, but also ensure the demand for terminal service execution .

Step 4: Select an idle downlink channel from all downlink channels corresponding to the selected other identification information.

It should be noted that the number of selected idle channels is not limited to one, and can be selected according to the needs of the terminal.

Step 104: Allocate the downlink channel corresponding to the identification information to the terminal.

In step 104, the downlink channel corresponding to the identification information is allocated to the terminal, so as to perform services for the downlink business of the terminal.

Preferably, the selected downlink channel is allocated to the terminal.

Through the scheme of the embodiment of the present invention, when receiving the signal-to-noise ratio SINR information reported by the terminal, the SINR information reported by the received terminal is determined according to the corresponding relationship between the set SINR information and the transmit power of the downlink channel The transmit power of the corresponding downlink channel, and according to the corresponding relationship between the set transmit power of the downlink channel and the identification information, obtain the identification information of the downlink channel corresponding to the determined transmission power, and transfer the identification information to the corresponding downlink channel The channel is allocated to the terminal, so that the network side allocates a suitable downlink channel for the terminal according to the needs of the terminal, avoiding the waste caused by the excessive transmission power of the downlink channel allocated for the terminal in the prior art, and targeted Allocating a suitable downlink channel to the terminal improves the utilization rate of the transmit power of the downlink channel, and satisfies different requirements of multi-user terminals on the network.

As shown in FIG. 3 , it is a flowchart of a method for allocating a downlink channel to a terminal according to an embodiment of the present invention. The embodiment of the present invention is an invention under the same idea as the above embodiment, and the method includes:

Step: 201: The determined corresponding relationship between the occurrence probability value of each historical SINR information and the SINR information.

In step 201, the correspondence between the determined probability value of each historical signal-to-noise ratio SINR information and the noise ratio SINR information specifically includes:

Firstly, the historical signal-to-noise ratio (SINR) information reported by the terminal within a set period of time is collected.

Specifically, the set duration may be in units of hours; it may also be timing collection, which is not limited here.

The SINR information reported by the terminal within the set time period is found from the network side, and the SINR information reported by the terminal within the set time period is found as the historical SINR information.

Secondly, the statistical principle is used to determine the probability value of occurrence of each collected historical signal-to-noise ratio SINR information.

Wherein, the statistical algorithm may, but is not limited to, use a CDF statistical function, which is not limited here.

Specifically, the number of occurrences of each signal-to-noise ratio SINR information and the total number of signal-to-noise ratio SINR information collected within a set period of time are counted, and the probability value of occurrence of each historical signal-to-noise ratio SINR information is calculated.

Second, establish a corresponding relationship between the determined occurrence probability value of each historical signal-to-noise ratio SINR information and the signal-to-noise ratio SINR information.

Step 202: Receive SINR information reported by the terminal.

Step 203: Determine the transmit power of the downlink channel corresponding to the received SINR information reported by the terminal according to the set correspondence between the SINR information and the transmit power of the downlink channel.

In step 203, the corresponding relationship between the SINR information and the transmission power of the downlink channel specifically includes:

Firstly, according to the determined correspondence between the probability value of occurrence of each historical SINR information and the SINR information, the probability value corresponding to the received SINR information reported by the terminal is determined.

Second, the calculated transmit power is adjusted by using the determined probability value to obtain the adjusted transmit power corresponding to the SINR information.

For example, the adjusted transmit powers are: 69mW, 126mW, 200mW, 282mW and 398mW.

Thirdly, the correspondence between the SINR information and the adjusted transmit power of the downlink channel is established.

On this basis, the transmit power of the downlink channel corresponding to the received SINR information reported by the terminal is determined according to the corresponding relationship between the SINR information and the adjusted transmit power of the downlink channel.

Preferably, the establishment of the corresponding relationship between the SINR information and the transmit power of the downlink channel specifically further includes:

Firstly, using the principle of statistics, the calculated probability value of each historical signal-to-noise ratio SINR information is discretely divided, and the interval information of the probability value corresponding to the signal-to-noise ratio SINR information is obtained.

For example: the probability values are 0%~20%, 21%~40%, 41%~60%, 61%~80% and 81%~100%.

Secondly, according to the total amount of downlink channel resources and the interval information of probability values, the amount of channel resources corresponding to each probability value interval, that is, the transmit power of the downlink channel is determined.

Thirdly, determine the signal-to-noise ratio SINR information included in each probability interval value, and establish a correspondence between the determined signal-to-noise ratio SINR information and the transmit power of the downlink channel corresponding to the probability interval value.

Step 204: Obtain the identification information of the downlink channel corresponding to the determined transmission power according to the corresponding relationship between the set transmission power of the downlink channel and the identification information.

Step 205: Allocate the downlink channel corresponding to the identification information to the terminal.

Through the solutions of the foregoing embodiments, the transmit power is periodically adjusted through statistical analysis, so that the determined transmit power of the downlink channel can better meet the requirements of the terminal and improve the throughput of the network.

As shown in FIG. 4 , it is a schematic structural diagram of a device for allocating downlink channels for a terminal according to an embodiment of the present invention. The device includes: a receiving module 11, a determining module 12, and an allocating module 13, wherein:

The receiving module 11 is configured to receive the signal-to-noise ratio (SINR) information reported by the terminal;

The determination module 12 is configured to determine the transmit power of the downlink channel corresponding to the received SINR information reported by the terminal according to the corresponding relationship between the set SINR information and the transmit power of the downlink channel, and determine the transmit power of the downlink channel according to the set SINR information of the downlink channel. The corresponding relationship between the transmission power and the identification information is to obtain the identification information of the downlink channel corresponding to the determined transmission power;

The allocation module 13 is configured to allocate the downlink channel corresponding to the identification information to the terminal.

Preferably, the device further includes: a calculation module 14 and a first establishment module 15, wherein:

Calculation module 14, is used for calculating the transmission power of the downlink channel that each SINR information needs;

The first establishing module 15 is configured to establish a corresponding relationship between SINR information and the calculated transmit power of the downlink channel.

Preferably, the device further includes: a grouping module 16 and a second establishing module 17, wherein:

The grouping module 16 is used to divide the plurality of downlink channels into different groups according to the number of calculated transmission power values of the downlink channels, wherein the transmission power of the downlink channels in each group is the same, and an identification is assigned to each group information;

The second establishing module 17 is used to determine the transmission power of each group of downlink channels, and establish the corresponding relationship between the transmission power and the identification information of the downlink channels

The device also includes a selection module 18, wherein:

The selection module 18 is configured to, after obtaining the identification information of the downlink channel corresponding to the determined transmission power, before using the downlink channel corresponding to the identification information as the downlink channel allocated for the terminal, from all the downlink channels corresponding to the identification information Select an idle downlink channel.

The allocation module is specifically configured to allocate the selected downlink channel to the terminal.

The device also includes: a judging module 19, wherein:

A judging module 19, configured to, after obtaining the identification information of the downlink channel corresponding to the determined transmit power, before selecting an idle downlink channel from all the downlink channels corresponding to the identification information, to determine the identity of the downlink channel corresponding to the determined identification information Whether the utilization rate is greater than the set value, when the judgment result is that the utilization rate is greater than the set value, select other identification information except the determined identification information, wherein the transmit power corresponding to the selected other identification information is greater than the determined The transmit power corresponding to the identification information;

The selection module 18 is specifically configured to select an idle downlink channel from all downlink channels corresponding to the selected other identification information.

The device also includes: an acquisition module 20 and a third establishment module 21, wherein:

The acquisition module 20 is used to collect historical signal-to-noise ratio SINR information reported by the terminal within a set period of time before receiving the signal-to-noise ratio SINR information reported by the terminal;

The third building module 21 is used to determine the probability value of each historical signal-to-noise ratio SINR information collected according to statistical principles, and establish the determined probability value and the noise ratio of each historical signal-to-noise ratio SINR information occurrence Correspondence between SINR information.

The device also includes: a transmission power adjustment module 22, wherein:

The transmission power adjustment module 22 is configured to determine the corresponding relationship between the received signal-to-noise ratio SINR information reported by the terminal according to the determined correspondence between the occurrence probability value of each historical signal-to-noise ratio SINR information and the signal-to-noise ratio SINR information. Probability value, and using the determined probability value to adjust the calculated transmit power to obtain the adjusted transmit power corresponding to the SINR information;

The first establishing module 15 is further configured to establish a corresponding relationship between SINR information and the adjusted transmit power of the downlink channel.

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 (12)

1. A method for distributing a downlink channel for a terminal, comprising: Receive the signal-to-noise ratio (SINR) information reported by the terminal; According to the corresponding relationship between the set SINR information and the transmit power of the downlink channel, determine the transmit power of the downlink channel corresponding to the received SINR information reported by the terminal, and determine the transmit power of the downlink channel according to the set transmit power and the identification information. The corresponding relationship between, to obtain the identification information of the downlink channel corresponding to the determined transmit power; Judging whether the utilization rate of the downlink channel corresponding to the determined identification information is greater than a set value; If so, select other identification information except for the determined identification information, and allocate to the terminal an idle downlink channel selected from all downlink channels corresponding to the selected other identification information, wherein the selected other identification information The transmission power corresponding to the identification information is greater than the transmission power corresponding to the determined identification information; Otherwise, allocate the downlink channel corresponding to the identification information to the terminal. 2. The method according to claim 1, wherein before receiving the signal-to-noise ratio (SINR) information reported by the terminal, the method further comprises: Calculate the transmit power of the downlink channel required for each SINR information; A correspondence relationship between the SINR information and the calculated transmit power of the downlink channel is established. 3. The method according to claim 2, wherein before receiving the signal-to-noise ratio (SINR) information reported by the terminal, the method further comprises: Dividing the multiple downlink channels into different groups according to the calculated transmit power of the downlink channels, wherein the transmit power of the downlink channels in each group is the same, and assigning an identification information to each group; determining the transmission power of each group of downlink channels; A corresponding relationship between the transmission power and the identification information of the downlink channel is established. 4. The method according to claim 3, wherein after obtaining the identification information of the downlink channel corresponding to the determined transmission power, before using the downlink channel corresponding to the identification information as the downlink channel allocated for the terminal, The method also includes: Select an idle downlink channel from all downlink channels corresponding to the identification information; Allocating the downlink channel corresponding to the identification information to the terminal, specifically including: Allocate the selected downlink channel to the terminal. 5. The method according to claim 2, wherein before receiving the signal-to-noise ratio (SINR) information reported by the terminal, the method further comprises: Collect the historical signal-to-noise ratio SINR information reported by the terminal within the set period of time; According to statistical principles, determine the probability value of each historical SINR information collected; A corresponding relationship between the determined occurrence probability value of each historical signal-to-noise ratio SINR information and the signal-to-noise ratio SINR information is established. 6. The method according to claim 5, characterized in that, after calculating the transmit power of the downlink channel required by each SINR information, before setting up the corresponding relationship between the SINR information and the calculated downlink channel transmit power, the The method also includes: According to the determined correspondence between the occurrence probability value of each historical signal-to-noise ratio SINR information and the signal-to-noise ratio SINR information, determine the probability value corresponding to the received signal-to-noise ratio SINR information reported by the terminal; adjusting the calculated transmit power by using the determined probability value to obtain the adjusted transmit power corresponding to the SINR information; The corresponding relationship between the SINR information and the calculated transmission power of the downlink channel is established, specifically including: A correspondence relationship between the SINR information and the adjusted transmit power of the downlink channel is established. 7. A device for assigning a downlink channel to a terminal, characterized in that it comprises: The receiving module is used to receive the signal-to-noise ratio SINR information reported by the terminal; A determining module, configured to determine the transmit power of the downlink channel corresponding to the received SINR information reported by the terminal according to the corresponding relationship between the set SINR information and the transmit power of the downlink channel, and transmit the power of the downlink channel according to the set A correspondence relationship between power and identification information, obtaining the identification information of the downlink channel corresponding to the determined transmission power; The judging module is used to judge whether the utilization rate of the downlink channel corresponding to the determined identification information is greater than the set value; An idle downlink channel selected from all corresponding downlink channels is allocated to the terminal, wherein the transmission power corresponding to the selected other identification information is greater than the transmission power corresponding to the determined identification information; otherwise, the transmission power corresponding to the identification information is used to The downlink channel is assigned to the terminal. 8. The device of claim 7, further comprising: A calculation module, configured to calculate the transmit power of the downlink channel required for each SINR information; The first establishment module is used to establish the corresponding relationship between the SINR information and the calculated transmission power of the downlink channel. 9. The device of claim 8, further comprising: A grouping module, configured to divide a plurality of downlink channels into different groups according to the calculated number of transmission power values of the downlink channels, wherein the transmission power of the downlink channels in each group is the same, and an identification information is assigned to each group ; The second establishing module is used to determine the transmission power of each group of downlink channels, and establish the corresponding relationship between the transmission power and the identification information of the downlink channels. 10. The device of claim 9, further comprising: A selection module, configured to, after obtaining the identification information of the downlink channel corresponding to the determined transmit power, select from all the downlink channels corresponding to the identification information before using the downlink channel corresponding to the identification information as the downlink channel allocated for the terminal Select an idle downlink channel; The allocation module is specifically configured to allocate the selected downlink channel to the terminal. 11. The device of claim 7, further comprising: The collection module is used to collect the historical signal-to-noise ratio SINR information reported by the terminal within a set period of time before receiving the signal-to-noise ratio SINR information reported by the terminal; The third building module is used to determine the probability value of the occurrence of each historical signal-to-noise ratio SINR information collected according to statistical principles, and establish the probability value and the occurrence probability value of each historical signal-to-noise ratio SINR information determined and the noise ratio SINR Correspondence between information. 12. The device of claim 11, further comprising: The transmit power adjustment module is configured to determine the corresponding relationship between the received signal-to-noise ratio SINR information reported by the terminal according to the determined correspondence between the occurrence probability value of each historical signal-to-noise ratio SINR information and the signal-to-noise ratio SINR information. Probability value, and using the determined probability value to adjust the calculated transmit power to obtain the adjusted transmit power corresponding to the SINR information; The first establishment module is also used to establish the corresponding relationship between the SINR information and the adjusted transmission power of the downlink channel.