WO2015032072A1

WO2015032072A1 - Data sending method, apparatus and device

Info

Publication number: WO2015032072A1
Application number: PCT/CN2013/083063
Authority: WO
Inventors: 丁承; 杨凯; 刘欢
Original assignee: 华为技术有限公司
Priority date: 2013-09-06
Filing date: 2013-09-06
Publication date: 2015-03-12
Also published as: CN103688482A

Abstract

Embodiments of the present invention provide a data sending method, an apparatus and a device. The data sending method in the present invention comprises: obtaining a first downlink receive level of a user equipment (UE) in a down link establishing phase; determining an initial modulation coding scheme according to the first downlink receive level and a mapping relationship between a preset level and a modulation coding scheme; and using the initial modulation coding scheme to send data to the UE. The embodiments of the present invention solve a problem of low transmission efficiency in the down link establishing phase.

Description

Data transmission method, device and device

Technical field

The present invention relates to communication technologies, and in particular, to a data transmission method, apparatus, and device. Background technique

In the field of communication technology, the wireless channel is basically a time-frequency dual fading channel. If it is a fast time-varying channel, the signal-to-noise ratio of two adjacent symbols may be different. In order to maintain a certain bit error rate, it must be based on the current The Modulation and Coding Scheme (MCS) is used to calculate the appropriate MCS according to a certain algorithm. This directly determines the adaptability of the whole system to different channels, directly affecting the throughput and bit error rate. Performance.

In the downlink establishment phase, that is, before the base station receives the first downlink data acknowledgement (ACK) sent by the user equipment (User Equipment, UE for short), the base station sends data by using a specified modulation and coding method. The modulation coding mode selection may be unreasonable. For example, if a high-order modulation coding mode is specified, when the channel condition is good, a high throughput rate can be obtained in the communication process, and in a poor channel condition, the two are Reliable communication cannot be achieved, a large number of retransmissions occur, and transmission efficiency is low. If a low-order modulation and coding scheme is specified, reliable communication between the two can still be achieved in the case of poor channel conditions, but in channel conditions. In a better case, the amount of data carried by each data packet is small, so that the throughput of communication between the two cannot reach a superior level, thereby causing waste of communication resources, and the transmission efficiency is also low. Summary of the invention

The embodiments of the present invention provide a data transmission method, apparatus, and device, which are used to solve the problem of low data transmission efficiency in the downlink establishment phase.

In a first aspect, an embodiment of the present invention provides a data sending method, including:

Obtaining a first downlink receiving level of the user equipment UE in a downlink setup phase; determining an initial modulation and coding mode according to the first downlink receiving level and a corresponding relationship between a preset level and a modulation and coding mode; Transmitting data to the UE by using the initial modulation and coding manner.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the initial modulation coding mode is determined according to the first downlink receiving level and a corresponding relationship between a preset level and a modulation and coding mode. , including:

If the first downlink reception level is less than or equal to a level corresponding to the highest order modulation and coding mode in the modulation and coding mode, determining that the modulation coding mode corresponding to the first downlink reception level is the initial modulation Encoding.

With the first possible implementation of the first aspect, in the second possible implementation manner of the first aspect, the sending, by using the initial modulation and coding manner, the data to the UE, includes:

The data is transmitted to the UE by using the initial modulation and coding mode and using a preset maximum transmit power value.

With reference to the first aspect, in a third possible implementation manner of the first aspect, the determining, by the first downlink receiving level, the corresponding relationship between the preset level and the modulation and coding mode, determining an initial modulation and coding manner , including:

If the first downlink reception level is greater than a level corresponding to the highest order modulation coding mode in the modulation and coding mode, determining that the highest order modulation coding mode is the initial modulation coding mode.

With reference to the third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, before the sending, by using the initial modulation and coding mode, the data is sent to the UE, the method further includes:

Calculating a transmit power value according to a level corresponding to the highest order modulation and coding mode;

Transmitting the data to the UE by using the initial modulation and coding manner includes:

And transmitting the data to the UE by using the highest order modulation coding method and using the calculated transmit power value.

With reference to the first aspect, the first to fourth possible implementation manners of the first aspect, in a fifth possible implementation manner of the first aspect, The first downlink receiving level includes:

If the first downlink of the UE already exists, when the second downlink is established for the UE, the first downlink is obtained according to the stored downlink receiving level in the context of the UE. Line reception level;

or, If the uplink of the UE is already existing, when the downlink corresponding to the uplink is established for the UE, the uplink receiving level in the context of the stored UE is used as the first a downlink receiving level;

Or,

If the uplink of the UE is already existing, when the downlink corresponding to the uplink is established for the UE, the first downlink receiving level is acquired according to the uplink data sent by the UE; or ,

If the uplink and the downlink of the UE are not present, when the downlink is established for the UE, the first downlink receiving level is acquired according to the uplink signaling message sent by the UE.

With reference to the first aspect, the first to the fifth possible implementation manners of the first aspect, in a sixth possible implementation manner of the first aspect, And determining the initial modulation and coding mode by the corresponding relationship between the preset level and the modulation and coding mode, including: filtering the first downlink receiving level to obtain a filtering level;

The initial modulation coding mode is determined according to the filtering level and the correspondence between the preset level and the modulation and coding mode.

In a second aspect, an embodiment of the present invention provides a data sending apparatus, including:

An acquiring module, configured to acquire a first downlink receiving level of the user equipment UE in a downlink establishment phase;

a determining module, configured to determine an initial modulation and coding mode according to the first downlink receiving level acquired by the acquiring module and a corresponding relationship between a preset level and a modulation and coding mode;

And a sending module, configured to send data to the UE by using the initial modulation and coding manner determined by the determining module.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the determining module is specifically configured to:

With reference to the first possible implementation of the second aspect, in a second possible implementation manner of the second aspect, the sending module is specifically configured to:

Transmitting the number by using the initial modulation and coding method and using a preset maximum transmit power value According to the UE.

With reference to the second aspect, in a third possible implementation manner of the second aspect, the determining module is specifically configured to:

In conjunction with the third possible implementation of the second aspect, in a fourth possible implementation of the second aspect, the method further includes:

a calculation module, configured to calculate a transmit power value according to a level corresponding to the highest-order modulation and coding mode;

The sending module is specifically configured to:

With reference to the second aspect, the first to the fourth possible implementation manner of the second aspect, in the fifth possible implementation manner of the second aspect, the acquiring module is specifically configured to:

If the first downlink of the UE already exists, when the second downlink is established for the UE, acquiring the UE according to the downlink receiving level in the stored context of the UE a downlink receiving level;

Or,

If the uplink of the UE is already existing, when the downlink corresponding to the uplink is established for the UE, the uplink receiving level in the context of the stored UE is used as the first a downlink receiving level;

Or,

With reference to the second aspect, the first to the fifth possible implementation manners of the second aspect, in the sixth possible implementation manner of the second aspect, the determining module is further configured to:

Performing filtering processing on the first downlink receiving level to obtain a filtering level; according to the filtering The initial modulation coding mode is determined by the level and the corresponding relationship between the preset level and the modulation and coding mode.

In a third aspect, an embodiment of the present invention provides a data sending device, including:

a processor, configured to acquire a first downlink receiving level of the user equipment UE in a downlink setup phase; and determine, according to the first downlink receiving level and a corresponding relationship between a preset level and a modulation and coding mode, Initial modulation coding method;

And a transmitter, configured to send data to the UE by using the initial modulation and coding manner determined by the processor.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the processor is specifically configured to:

In conjunction with the first possible implementation of the third aspect, in a second possible implementation manner of the third aspect, the transmitter is specifically configured to:

In conjunction with the third aspect, in a third possible implementation manner of the third aspect, the processor is further configured to:

In conjunction with the third possible implementation of the third aspect, in a fourth possible implementation manner of the third aspect, the processor is further configured to:

Then the transmitter is specifically used to:

With reference to the third aspect, the first to the fourth possible implementation manners of the third aspect, in a fifth possible implementation manner of the third aspect, the processor is specifically configured to:

If the first downlink of the UE already exists, when the second downlink is established for the UE, Acquiring the first downlink receiving level according to the stored downlink receiving level in the context of the UE;

Or,

With reference to the third aspect, the first to the fifth possible implementation manner of the third aspect, in a sixth possible implementation manner of the third aspect, the processor is further configured to:

And filtering the first downlink receiving level to obtain a filtering level; determining the initial modulation and encoding mode according to the filtering level and a correspondence between a preset level and a modulation and coding mode.

The data sending method, device and device in the embodiment of the present invention acquire the first downlink receiving level of the UE in the downlink establishment phase, and according to the first downlink receiving level and the preset level and modulation coding Corresponding relationship between the modes, determining an initial modulation and coding mode, and transmitting data to the UE by using the modulation and coding manner, so as to implement data in a reasonable modulation and coding manner in a downlink establishment phase, thereby improving data carried by each data packet. The quantity avoids the massive retransmission of data and solves the problem of low transmission efficiency in the downlink establishment phase. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. The drawings are some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive labor.

1 is a flowchart of Embodiment 1 of a data transmission method according to the present invention; 2 is a flowchart of Embodiment 2 of a data sending method according to the present invention;

_{3 is} a schematic structural diagram of Embodiment 1 of a data transmitting apparatus according to the present invention;

4 is a schematic structural diagram of Embodiment 2 of a data transmitting apparatus according to the present invention;

FIG. 5 is a schematic structural diagram of an embodiment of a data transmitting device according to 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 a partial embodiment of the invention, and 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 are within the scope of the present invention.

FIG. 1 is a flowchart of Embodiment 1 of a data sending method according to the present invention. As shown in FIG. 1, the method in this embodiment may include:

Step 101: Acquire a first downlink receiving level of the UE in a downlink establishment phase.

The execution body of this embodiment may be a base station device. A Temporary Block Flow (TBF) is a physical connection between a UE and a Radio Resource Management Entity of a Base Station Subsystem (BSS) to achieve a Packet Data Channel (Packet Data Channel). PDCH) supports the purpose of one-way transmission of Logical Link Control (LLC) protocol data unit (PDU), which is controlled by some radio links carrying one or more LLC PDUs. Layer (Radio Link Control, RLC for short) / Media Access Control (MAC) block, which exists only during data transmission.

In this embodiment, in the downlink establishment phase, also referred to as the TBF establishment phase, that is, the phase before the base station receives the first downlink ACK feedback sent by the UE, the base station acquires the first downlink receiving level at this stage. The first downlink receiving level may be a receiving level when the base station obtains data that may be received by the UE according to a downlink setup scenario of the current UE.

Step 102: Determine an initial modulation and coding mode according to the first downlink receiving level and a correspondence between a preset level and a modulation and coding mode.

Different modulation coding modes require different levels of correct decoding. The higher the modulation coding mode, the higher the required level. For example, in the protocol, the configuration of the radio frequency rate is indexed by modulation coding. The value is implemented, and the factor affecting the communication rate is used as a column of the table, and the MCS index is used as a row of the table to form an MCS modulation and coding table, where each MCS index corresponds to a physical transmission rate under a set of parameters, and the communication rate is affected. The factors include the modulation and coding mode. The higher the modulation and coding mode, the higher the MCS index value, that is, the larger the amount of information included in the case of the same length of data block.

The level of the corresponding initial modulation coding mode in the corresponding relationship is less than or equal to the first downlink reception level, and the modulation coding mode is higher than the determined initial modulation coding mode in the correspondence. The corresponding electrical average is greater than the first downlink reception level. That is, when the initial modulation coding mode is determined in step 102, the first downlink reception level can be compared with the level corresponding to each modulation coding mode in the correspondence relationship to determine the initial modulation coding mode.

Specifically, the initial modulation coding mode is determined according to the first downlink reception level and the corresponding relationship between the preset level and the modulation and coding mode, and the first downlink reception level and the corresponding modulation coding mode are corresponding to the corresponding downlink coding level. The levels are compared, and the corresponding modulation and coding scheme is selected as the initial modulation and coding scheme according to the result of the comparison of the first downlink reception level and the level corresponding to the certain modulation and coding scheme. For example, if the first receiving level is XI, the level corresponding to the modulation and coding mode 1 is Y1, and the level corresponding to the modulation and coding mode 2 is Y2, and Y2>Y1, when XI is greater than or equal to Y1 and less than Υ2 Then, the modulation coding mode corresponding to the first reception level XI is modulation coding mode 1.

The corresponding relationship between the preset level and the modulation and coding mode may be a mapping table between the modulation coding mode and the level pre-existing in the base station, or may be a correspondence between the level and the modulation and coding mode according to the user's needs. The relationship is pre-configured to the base station.

Step 103: Send data to the UE by using the initial modulation and coding manner.

In this embodiment, the data is processed according to the initial modulation and coding mode determined in step 102, and the data is transmitted in combination with the corresponding transmit power.

In this embodiment, the first downlink receiving level of the UE is acquired in the downlink establishment phase, and the initial modulation coding is determined according to the first downlink receiving level and the corresponding relationship between the preset level and the modulation and coding mode. And transmitting data to the UE by using the modulation and coding manner, so that data is processed by using a reasonable modulation and coding manner in a downlink establishment phase, which not only increases the amount of data carried by each data packet, but also avoids a large number of data retransmissions. To solve the problem of low transmission efficiency in the downlink establishment phase.

Further, in the step 101 of the embodiment, the first downlink receiving level is obtained in the downlink establishment phase, and the specific implementation method is divided into three cases according to the downlink establishment scenario of the UE, where the first type is The first downlink of the UE already exists, and the second downlink is established for the UE. The eNB obtains the downlink receiving level in the context of the stored UE, that is, the downlink has been established before the base station and the UE, and the downlink of the UE needs to be re-established due to the change of the frequency domain resource. At this time, the relevant information about the channel between the base station and the UE is already stored in the base station, and the base station can acquire the first downlink receiving level saved in the context; the second is that if the uplink of the UE already exists, When the downlink corresponding to the uplink is established for the UE, the base station acquires an uplink receiving level according to the stored uplink receiving level of the UE or an uplink receiving level obtained according to the uplink data of the UE. Obtaining a first downlink receiving level of the UE, that is, an uplink between the base station and the UE is established, and a downlink needs to be established, where only information related to the channel between the base station and the UE is saved by the base station. The uplink receiving level is included, and the base station can estimate the first downlink receiving level by using the uplink receiving. In this scenario, the base station can also receive the uplink data of the UE. Obtaining an uplink receiving level of the UE, and acquiring a first downlink receiving level of the UE according to the uplink receiving level; and third, if the uplink and downlink of the UE are not present, When the UE establishes a downlink, the uplink receiving level is obtained according to the uplink signaling message of the UE, and the downlink receiving level is obtained according to the uplink receiving estimation, that is, the uplink is not established between the base station and the UE, The downlink is not established, and the base station only receives the uplink signaling message sent by the UE, for example, may be the access signaling of the UE, and the base station needs to obtain the first downlink receiving level at this stage according to the The information carried in the uplink signaling message obtains an uplink receiving level, and then acquires a first downlink receiving level of the UE according to an uplink receiving level.

In the above three setup scenarios, the method for obtaining the first downlink reception level according to the uplink reception level may be, for example:

If the broadcast control channel and the traffic channel are in the same frequency band, based on the principle that the uplink airway path loss is equal to the downlink airway path loss, where

Uplink air path loss = UE transmit power - Uplink reception level of the base station when the UE accesses

(2)

Downlink air path loss = base station transmit power - combined path loss - UE's first downlink receive level

(3)

According to the equations (2) and (3), the equation can be obtained:

First downlink reception level of the UE = base station transmission power - UE transmission power + uplink reception level of the base station when the UE is connected - combined path loss (4) In formula (4), the base station transmit power may be the maximum transmit power that the base station can reach according to the system configuration of the base station; the UE transmit power may be the transmit power of the UE according to the uplink power control; and the uplink of the base station when the UE accesses The receiving level may be a receiving level of the base station when receiving the uplink message in the initial access process of the UE; the combined path loss may be a fixed value, and is related to the channel quality of the downlink.

If the broadcast control channel and the traffic channel are located in different frequency bands, based on the principle that the uplink airway path loss is equal to the downlink airway path loss, where

(2)

+Differential band path loss (5)

According to the equations (2) and (5), the equation can be obtained:

First downlink reception level of the UE = base station transmission power - UE transmission power + uplink reception level of the base station when the UE is connected - combined path loss + different band path loss (6)

Equation (6) and formula (4) are basically similar, wherein the difference in the path loss of the different frequency band can be a fixed value. When the frequency band of the broadcast control channel and the traffic channel is fixed, the difference is also fixed accordingly.

Further, in step 102 of the embodiment, the initial modulation and coding mode is determined according to the first downlink receiving level and the corresponding relationship between the preset level and the modulation and coding mode, and the specific implementation method may be: The first downlink receiving level is less than or equal to the level corresponding to the highest order modulation and coding mode in the modulation and coding mode, and determining that the modulation and coding mode corresponding to the first downlink receiving level is the initial modulation and coding mode, The highest-order modulation and coding mode is the modulation coding mode corresponding to the largest MCS index value in the MCS modulation and coding table on the downlink specified in the protocol. For example, the maximum MCS index value is 15, and the corresponding modulation and coding mode is 64. -QAM, the modulation and coding mode can be found in the modulation coding mode and the reception level mapping table pre-stored by the base station, and may have a corresponding reception level, for example, 20 dB, and the base station will receive the first downlink reception obtained in step 101. Comparing the level with the receiving level, when the first downlink receiving level is less than or equal to the downlink receiving level, for example, the first The downlink receiving level is 18 dB, which indicates that the level predicted by the base station when receiving the data does not reach the level corresponding to the highest order modulation and coding mode, and the higher the modulation and coding mode, the higher the required receiving level. Principle, if the UE is based on the current forecast, the first The line receiving level receives the data processed by the highest order modulation and coding method, and may not be correctly demodulated. Therefore, the base station needs to adjust the modulation and coding mode, and the adjustment manner may be adjusted to correspond to the first downlink receiving level. The modulation and coding method can also be adjusted to a lower modulation and coding scheme. However, if it is adjusted to a lower modulation and coding scheme, although the success rate of demodulation can be improved, the amount of information contained in the data block is also reduced, which cannot be solved. The transmission efficiency is low. Therefore, in this embodiment, the modulation and coding mode is adjusted to the modulation coding mode corresponding to the first downlink reception level, that is, the modulation coding mode corresponding to 18 dB, for example, may be 16-QAM; In this case, the initial modulation and coding mode is used to send data to the UE in step 103. The specific implementation manner may be: using the initial modulation and coding mode and using a preset maximum transmit power value, Describe the data to the UE, because the base station predicts the level of the UE when accepting data, it is assumed that the base station has a preset maximum transmission. Sending power to transmit data, after the loss in the data transmission process, how much power is left when reaching the UE is the first downlink receiving level. Therefore, in the above case, after the modulation and coding mode of the data is adjusted, the base station is still The preset maximum transmit power is sent for data.

In contrast to the above, in the step 102 of the embodiment, the initial modulation coding mode is determined according to the first downlink reception level and the corresponding relationship between the preset level and the modulation and coding mode, and the specific implementation method may also be: If the first downlink receiving level is greater than a level corresponding to the highest order modulation and coding mode in the modulation and coding mode, determining that the highest order modulation and coding mode is the initial modulation and coding mode, for example, may be the largest The MCS index value is 15, the corresponding modulation and coding mode is 64-QAM, and the corresponding reception level is 20 dB, and the first downlink reception level is 22 dB, which indicates that the base station predicts the UE's power when receiving data. The level is greater than the level corresponding to the highest order modulation and coding mode, and the data processed by the highest order modulation and coding method at a level of 22 dB has a power surplus, so the highest order modulation and coding method is used as the initial modulation and coding mode to make the same length The amount of information contained in the data block is maximized; correspondingly, in this case, the initial modulation and coding method is used in step 103. The data may be sent to the UE. The specific implementation manner may be: calculating a transmit power value by using a level corresponding to the highest-order modulation and coding mode, and then transmitting the data by using the highest-order modulation and coding mode and the calculated transmit power value. Because in this case, after the base station transmits data with the preset maximum transmit power, the UE's first downlink receive level 22dB can correctly demodulate the data, and there is a power surplus, then to reduce the interference, recalculate The transmission power of the base station, that is, the level corresponding to the known highest-order modulation and coding mode is 20 dB, and the first downlink reception level of the UE predicted by the base station is 22 dB, then the power surplus is 2 dB, so the base station transmits the full power. 2dB lower, the new transmit power is calculated, and then the data is processed in the highest order modulation coding mode and the data is transmitted at the recalculated transmit power.

2 is a flowchart of Embodiment 2 of a data sending method according to the present invention. As shown in FIG. 2, the method in this embodiment may include:

Step 201: Acquire a first downlink receiving level of the UE in a downlink establishment phase.

In this embodiment, the process of obtaining the first downlink receiving level of the UE is similar to the step 101 of the first embodiment in the downlink setup phase, and details are not described herein again.

Step 202: Perform filtering processing on the first downlink receiving level to obtain a filtering level, and determine an initial modulation and coding mode according to the filtering level and a correspondence between a preset level and a modulation and coding mode.

In this embodiment, the first downlink receiving level is filtered, and the formula is: filtered first downlink receiving level=history level X filtering factor + (1-filtering factor) X a downlink receiving level (1), wherein if the number of filtered data blocks ≤ the preset initial number of filtering blocks, the filtering factor = 1 / the number of filtered data blocks, if the number of filtered data blocks > preset The initial filter block number, then the filter factor = a preset filter factor; or, the filter factor is a preset fixed filter factor.

The number of the filtered data blocks may be the number of the TBFs that the base station has sent out, and the preset initial number of the filtered blocks may be a value preset by the base station, where the historical level may be when the base station filters the previous time. The first downlink reception level.

In this embodiment, the implementation process of determining the initial modulation and coding mode is similar to the step 102 of the first embodiment according to the filtering level and the corresponding relationship between the preset level and the modulation and coding mode, and is not described herein.

For a description of the correspondence between the preset level and the modulation and coding mode, refer to step 102. Step 203: Send data to the UE by using the initial modulation and coding manner.

In this embodiment, the process of transmitting data to the UE by using the initial modulation and coding mode is similar to the step 103 of the first embodiment, and details are not described herein again.

In this embodiment, the first downlink receiving level of the acquired UE is filtered in the downlink establishment phase to obtain a filtering level, and according to the filtering level and the corresponding relationship between the preset level and the modulation and coding mode. Determine the initial modulation and coding mode, realize the rational selection of the modulation coding mode in the initial stage, and solve the problem of low transmission efficiency in the downlink establishment phase. FIG. 3 is a schematic structural diagram of Embodiment 1 of a data transmitting apparatus according to the present invention. As shown in FIG. 3, the apparatus in this embodiment may include: an obtaining module 31, a determining module 32, and a sending module 33.

The obtaining module 31 is configured to acquire the first downlink receiving level of the UE in the downlink setup phase, and the determining module 32 is configured to use the first downlink receiving level and the preset level acquired by the acquiring module 31. Modulating the correspondence relationship of the coding modes, and determining an initial modulation and coding mode;

The sending module 33 is configured to send data to the UE by using the initial modulation and coding manner determined by the determining module 32.

For a description of the correspondence between the preset level and the modulation and coding mode, refer to step 102. The device in this embodiment can be used to implement the technical solution of the method embodiment shown in FIG. 1. The principle and the technical effect are similar, and details are not described herein again.

4 is a schematic structural diagram of a second embodiment of a data transmitting apparatus according to the present invention. As shown in FIG. 4, the apparatus of the present embodiment further includes: a computing module 41, based on the apparatus structure shown in FIG.

The calculating module 41 is configured to calculate a transmit power value according to the level corresponding to the highest-order modulation and coding mode; and the sending module 33 is specifically configured to use the highest-order modulation and coding mode and use the calculated transmit power value. Sending the data to the UE.

The device in this embodiment can be used to implement the technical solution of the method embodiment shown in FIG. 1. The principle and the technical effect are similar, and details are not described herein again.

Further, the determining module 32 is further configured to: perform filtering processing on the first downlink receiving level to obtain a filtering level; and according to the filtering level and the preset level and modulation and coding mode Corresponding relationship, determining the initial modulation and coding mode.

FIG. 5 is a schematic structural diagram of an embodiment of a data transmitting device according to the present invention. As shown in FIG. 5, the device in this embodiment may include: a processor 51 and a transmitter 52.

The processor 51 is configured to acquire a first downlink receiving level of the UE in a downlink setup phase, and determine an initial modulation according to the first downlink receiving level and a corresponding relationship between a preset level and a modulation and coding mode. Encoding;

The transmitter 52 is configured to send data to the UE by using an initial modulation and coding manner determined by the processor 51.

For a description of the correspondence between the preset level and the modulation and coding mode, refer to step 102. The device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. For details, refer to the above method embodiments, and details are not described herein again.

Further, the processor 51 is further configured to perform filtering processing on the first downlink receiving level, acquire a filtering level, and according to a filtering level and a correspondence between a preset level and a modulation and coding mode, Determine the initial modulation coding method.

In the several embodiments provided by the present invention, it should be understood that the disclosed 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 electrical, mechanical or otherwise.

The units described as separate components may or may not be physically separated, and the components displayed as the unit may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. . Some or all of the units may be selected according to actual needs to achieve the objectives 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 hardware plus software functional units.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

Finally, it should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting thereof; 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 foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

claims

1. A data sending method, characterized by including:

In the downlink establishment phase, obtain the first downlink reception level of the user equipment UE; determine the initial modulation and coding method according to the first downlink reception level and the correspondence between the preset level and the modulation and coding method;

Send data to the UE using the initial modulation and coding method.

2. The method according to claim 1, characterized in that, determining the initial modulation and coding method according to the first downlink reception level and the corresponding relationship between the preset level and the modulation and coding method includes:

If the first downlink reception level is less than or equal to the level corresponding to the highest-order modulation and coding method among the modulation and coding methods, then it is determined that the modulation and coding method corresponding to the first downlink reception level is the initial modulation. Encoding.

3. The method according to claim 2, wherein using the initial modulation and coding method to send data to the UE includes:

Using the initial modulation and coding method and using a preset maximum transmission power value, the data is sent to the UE.

4. The method according to claim 1, wherein determining the initial modulation and coding method according to the first downlink reception level and the corresponding relationship between the preset level and the modulation and coding method includes:

If the first downlink reception level is greater than the level corresponding to the highest-order modulation and coding mode among the modulation and coding modes, then the highest-order modulation and coding mode is determined to be the initial modulation and coding mode.

5. The method according to claim 4, characterized in that, before sending data to the UE using the initial modulation and coding method, it further includes:

Calculate the transmit power value according to the level corresponding to the highest-order modulation and coding method;

The method of sending data to the UE using the initial modulation and coding method includes:

Using the highest-order modulation and coding method and using the calculated transmission power value, the data is sent to the UE.

6. The method according to any one of claims 1 to 5, characterized in that, in the downlink establishment phase, obtaining the first downlink reception level of the UE includes:

If the first downlink of the UE already exists, when establishing the second downlink for the UE, Obtain the first downlink reception level according to the stored downlink reception level in the context of the UE; or,

If the uplink of the UE already exists, when establishing the downlink corresponding to the uplink for the UE, the stored uplink reception level in the context of the UE is used as the third downlink receive level; or,

If the uplink of the UE already exists, when establishing the downlink corresponding to the uplink for the UE, obtain the first downlink reception level according to the uplink data sent by the UE; or ,

If neither the uplink nor the downlink of the UE exists, when establishing a downlink for the UE, the first downlink reception level is obtained according to the uplink signaling message sent by the UE.

7. The method according to any one of claims 1 to 6, wherein the initial modulation is determined based on the first downlink reception level and the corresponding relationship between the preset level and the modulation and coding method. Coding method, including:

Perform filtering processing on the first downlink reception level to obtain a filtering level;

The initial modulation and coding method is determined according to the corresponding relationship between the filtering level and the preset level and the modulation and coding method.

8. A data sending device, characterized in that it includes:

The acquisition module is used to acquire the first downlink reception level of the user equipment UE during the downlink establishment phase;

Determining module, configured to determine the initial modulation and coding method according to the first downlink reception level obtained by the acquisition module and the corresponding relationship between the preset level and the modulation and coding method;

A sending module, configured to send data to the UE using the initial modulation and coding method determined by the determining module.

9. The device according to claim 8, characterized in that the determination module is specifically configured to: if the first downlink reception level is less than or equal to the highest order modulation and coding method in the modulation and coding method. level, it is determined that the modulation and coding mode corresponding to the first downlink reception level is the initial modulation and coding mode.

10. The device according to claim 9, characterized in that the sending module is specifically used for:

Using the initial modulation and coding method and using the preset maximum transmission power value, transmit the data to the UE.

11. The device according to claim 8, characterized in that the determining module is specifically used for:

12. The device according to claim 11, further comprising:

A calculation module configured to calculate the transmit power value based on the level corresponding to the highest-order modulation and coding method;

The sending module is specifically used for:

13. The device according to any one of claims 8 to 12, characterized in that the acquisition module is specifically used for:

If the first downlink of the UE already exists, when establishing the second downlink for the UE, the first downlink is obtained according to the stored downlink reception level in the context of the UE. Line receive level;

or,

If the uplink of the UE already exists, when establishing the downlink corresponding to the uplink for the UE, the stored uplink reception level in the context of the UE is used as the third —Downlink reception level;

or,

14. The device according to any one of claims 8 to 13, characterized in that the determination module is also used for:

Perform filtering processing on the first downlink reception level to obtain a filtering level; Determine the initial modulation and coding method according to the filtering level and the corresponding relationship between the preset level and the modulation and coding method. code mode.

15. A data sending device, characterized in that it includes:

The processor is configured to obtain the first downlink reception level of the user equipment UE during the downlink establishment phase; and determine the first downlink reception level according to the corresponding relationship between the first downlink reception level and the preset level and the modulation and coding method. Initial modulation and coding method;

A transmitter, configured to send data to the UE using the initial modulation and coding method determined by the processor.

16. The device according to claim 15, characterized in that the processor is specifically configured to: if the first downlink reception level is less than or equal to the highest order modulation and coding method in the modulation and coding method. level, it is determined that the modulation and coding mode corresponding to the first downlink reception level is the initial modulation and coding mode.

17. The device according to claim 16, wherein the transmitter is specifically configured to: use the initial modulation and coding method and use a preset maximum transmission power value to send the data to the UE.

18. The device according to claim 15, wherein the processor is further configured to: if the first downlink reception level is greater than the level corresponding to the highest-order modulation and coding method among the modulation and coding methods. If equal, the highest-order modulation and coding method is determined to be the initial modulation and coding method.

19. The device according to claim 18, wherein the processor is further configured to: calculate the transmit power value according to the level corresponding to the highest-order modulation and coding method;

Then the transmitter is specifically used for:

20. The device according to any one of claims 15 to 19, characterized in that the processor is specifically used for:

or,

If the uplink of the UE already exists, when establishing the downlink corresponding to the uplink for the UE, the stored uplink reception level in the context of the UE is used as the third Downlink reception level;

or,

21. The device according to any one of claims 15 to 20, characterized in that the processor is also used for:

Perform filtering processing on the first downlink reception level to obtain the filtering level;