WO2017219321A1

WO2017219321A1 - Method and apparatus for self-adaptive retransmission scheduling of wireless system

Info

Publication number: WO2017219321A1
Application number: PCT/CN2016/086937
Authority: WO
Inventors: 文敏; 高慧
Original assignee: 华为技术有限公司
Priority date: 2016-06-23
Filing date: 2016-06-23
Publication date: 2017-12-28

Abstract

Disclosed are a method and apparatus for self-adaptive retransmission scheduling of a wireless system, belonging to the technical field of wireless communications. The method comprises: if an error occurs when a receiving end demodulates a data block, a sending end acquiring a demodulation and decoding loss amount of the receiving end demodulating the data block; the sending end allocating a retransmission resource to the data block according to the demodulation and decoding loss amount and current channel information about the receiving end; and the sending end retransmitting the data block via the retransmission resource. The apparatus comprises: an acquisition module, an allocation module and a transmission module. In the present invention, in conjunction with a demodulation and decoding loss amount of a receiving end demodulating a data block, a retransmission resource is allocated to the data block, so that the allocated retransmission resource is more accurate, and thus the utilization ratio of a transmission resource is improved.

Description

Wireless system adaptive retransmission scheduling method and device

Technical field

The present invention relates to the field of wireless communications, and in particular, to a wireless system adaptive retransmission scheduling method and apparatus.

Background technique

In a wireless system, when a transmitting end sends a data block to a receiving end, due to the time variation of the wireless system and the influence of multipath fading on the transmitted signal, the receiving end sometimes cannot completely decode the received data block, resulting in the received data block. In order to reduce the impact of such data block errors, an adaptive retransmission mechanism is introduced in the wireless system; when the received data block is in error, the transmitting end allocates a retransmission resource for the data block, and retransmits the resource through the retransmission resource. The receiving end transmits the data block.

The retransmission resource may be an RB (Resource Block), and the process of re-allocating the RB for the data block may be: the transmitting end acquires the highest code rate corresponding to the modulation mode according to the modulation mode when the data block is initially transmitted. And determining, according to the highest code rate and the data size of the data block, the number of RBs required to retransmit the data block, and re-assigning the RB according to the RB number.

In the process of implementing the present invention, the inventors have found that the prior art has at least the following problems:

The demodulation state information of the receiving end may change, which results in inaccurate number of RBs allocated in the foregoing method, thereby reducing the utilization of transmission resources.

Summary of the invention

In order to solve the problems of the prior art, the present invention provides a wireless system adaptive retransmission scheduling method and apparatus. The technical solutions are as follows:

In a first aspect, the present invention provides a wireless system adaptive retransmission scheduling method, where the method includes:

If the receiving end demodulates the data block, the transmitting end acquires the demodulation and decoding loss amount of the data block to be demodulated by the receiving end;

The transmitting end is configured according to the demodulation decoding loss amount and the current channel information of the receiving end. Representing a data block allocation retransmission resource;

The transmitting end retransmits the data block by using the retransmission resource.

In the embodiment of the present invention, if the receiving end demodulates the data block error, the transmitting end acquires the demodulation decoding loss amount of the demodulated data block of the receiving end; and the transmitting end according to the demodulation decoding loss amount and the current channel information of the receiving end, The data block is allocated a retransmission resource; the transmitting end retransmits the data block by using the retransmission resource; and the demodulation state information of the receiving end may change, in the embodiment of the invention, the demodulation of the data block is demodulated by the receiving end. The amount of decoding loss is allocated to the data block to retransmit the resource, so that the allocated retransmission resource is more accurate, thereby improving the utilization of the transmission resource.

In a possible design, the transmitting end acquires a demodulation and decoding loss amount of the data block to be demodulated by the receiving end, and includes:

And acquiring, by the sending end, scheduling information when the data block is initially transmitted, and acquiring, according to the scheduling information, a first spectrum efficiency and a number of first resource blocks RB when the data block is initially transmitted;

The transmitting end acquires, according to the demodulation state information of the receiving end, a second spectrum efficiency that the receiving end initially receives the data block;

And the transmitting end calculates, according to the first spectrum efficiency, the first RB number, and the second spectrum efficiency, a demodulation and decoding loss amount of the data block to be demodulated by the receiving end.

In the embodiment of the present invention, the transmitting end acquires the first spectrum efficiency and the first RB data at the initial time of the data block, and the second spectrum efficiency of the receiving end initially receiving the data block, and combines the first spectrum efficiency with the first RB number. And the second spectral efficiency, the demodulation decoding loss amount of the data block is demodulated by the receiving end, so that the calculated demodulation decoding loss amount is more accurate.

In another possible design, the sending end acquires, according to the demodulation state information of the receiving end, the second spectrum efficiency that the receiving end initially receives the data block, including:

The transmitting end receives a channel quality indicator CQI that is received by the receiving end when the receiving end initially receives the data block, and acquires a second spectrum efficiency corresponding to the CQI according to the CQI; or

The transmitting end acquires a second spectrum efficiency that the receiving end initially receives the data block according to the modulation and coding mode MCS when the data block is initially transmitted.

In the embodiment of the present invention, the second spectrum efficiency is obtained by the CQI fed back by the receiving end. Since the CQI is the CQI that the receiving end initially receives the data block, the accuracy of the second spectrum efficiency is improved. Further, in the embodiment of the present invention, the second spectrum efficiency may also be estimated by the transmitting end according to the MCS when the data block is initially transmitted, because the feedback of the receiving end is not required, thereby improving the calculation of the second spectral efficiency. s efficiency.

In another possible design, the transmitting end acquires a demodulation and decoding loss amount of the data block to be demodulated by the receiving end, and includes:

Receiving, by the transmitting end, a spectrum loss amount of the data block sent by the receiving end;

The sending end acquires the first RB number when the data block is initially transmitted;

And the transmitting end calculates, according to the amount of spectrum loss and the number of the first RB, a demodulation and decoding loss amount of the data block to be demodulated by the receiving end.

In the embodiment of the present invention, the transmitting end does not need to calculate the amount of spectrum loss, but the receiving end feeds back the spectrum loss amount to the transmitting end, and the transmitting end directly calculates the demodulation decoding of the data block by the receiving end according to the spectrum loss amount. The amount of loss, thereby reducing the burden on the transmitting end, and improving the processing efficiency of the transmitting end.

In another possible design, the retransmission resources include RB and MCS values;

And the transmitting end allocates a retransmission resource to the data block according to the demodulation and decoding loss amount and the current channel information of the receiving end, including:

The transmitting end calculates a current third spectrum efficiency and an MCS value of the receiving end according to the current channel information of the receiving end;

Calculating, according to the demodulation decoding loss amount and the third spectral efficiency, a number of second RBs for retransmitting the data block;

And allocating a retransmission resource to the data block according to the MCS value and the second RB number.

In the embodiment of the present invention, the demodulation decoding loss amount of the data block and the current channel information of the receiving end are demodulated in combination with the receiving end, and the retransmission resource is allocated for the data block, thereby improving the utilization of the transmission resource.

In a second aspect, the present invention provides a wireless system adaptive retransmission scheduling apparatus, the apparatus comprising:

An obtaining module, configured to: if the receiving end demodulates a data block error, obtain a demodulation and decoding loss amount of the data block to be demodulated by the receiving end;

An allocating module, configured to allocate a retransmission resource to the data block according to the demodulation decoding loss amount and current channel information of the receiving end;

And a transmission module, configured to retransmit the data block by using the retransmission resource.

In a possible design, the acquiring module is further configured to acquire scheduling information when the data block is initially transmitted, and obtain, according to the scheduling information, a first spectrum efficiency and a first time when the data block is initially transmitted. a number of resource blocks RB; acquiring, according to the demodulation state information of the receiving end, a second spectrum efficiency that the receiving end initially receives the data block; according to the first spectrum efficiency, the first RB number, and the first The second spectral efficiency is calculated by demodulating the demodulation and decoding loss of the data block by the receiving end.

In another possible design, the acquiring module is further configured to receive, by the receiving end, a channel quality indicator CQI when the receiving end initially receives the data block, and obtain the CQI corresponding according to the CQI. Second spectral efficiency; or,

The acquiring module is further configured to acquire, according to a modulation and coding mode MCS when the data block is initially transmitted, a second spectrum efficiency that the receiving end initially receives the data block.

In another possible design, the acquiring module is further configured to receive a spectrum loss amount of the data block sent by the receiving end, and obtain a first RB number when the data block is initially transmitted; according to the spectrum And calculating, by the receiving end, a demodulation decoding loss amount of the data block by the receiving end.

In a third aspect, the present invention provides a wireless system adaptive retransmission scheduling apparatus, the apparatus comprising:

a processor, configured to: if the receiving end demodulates a data block error, obtain a demodulation and decoding loss amount of the data block to be demodulated by the receiving end;

The processor is further configured to allocate a retransmission resource to the data block according to the demodulation decoding loss amount and current channel information of the receiving end;

a transmitter, configured to retransmit the data block by using the retransmitted resource.

In a possible design, the processor is further configured to acquire scheduling information when the data block is initially transmitted, and obtain, according to the scheduling information, a first spectrum efficiency and a first time when the data block is initially transmitted. a number of resource blocks RB; acquiring, according to the demodulation state information of the receiving end, a second spectrum efficiency that the receiving end initially receives the data block; according to the first spectrum efficiency, the first RB number, and the first The second spectral efficiency is calculated by demodulating the demodulation and decoding loss of the data block by the receiving end.

In another possible design, the processor is further configured to receive the Obtaining, by the receiving end, the channel quality indicator CQI when the data block is initially received, and acquiring, according to the CQI, a second spectrum efficiency corresponding to the CQI; or

The processor is further configured to acquire, according to a modulation and coding mode MCS when the data block is initially transmitted, a second spectrum efficiency that the receiving end initially receives the data block.

In another possible design, the processor is further configured to receive a spectrum loss amount of the data block sent by the receiving end, acquire a first RB number when the data block is initially transmitted, and according to the spectrum And calculating, by the receiving end, a demodulation decoding loss amount of the data block by the receiving end.

The processor is further configured to calculate, according to current channel information of the receiving end, a current third spectrum efficiency and an MCS value of the receiving end; and calculate, according to the demodulated decoding loss amount and the third spectral efficiency, Retransmitting the second RB number of the data block; allocating retransmission resources to the data block according to the MCS value and the second RB number.

DRAWINGS

1 is a block diagram of a wireless system adaptive retransmission scheduling apparatus according to an embodiment of the present invention;

2-1 is a flowchart of a method for adaptive retransmission scheduling of a wireless system according to an embodiment of the present invention;

2-2 is a schematic diagram of an adaptive retransmission scheduling of a wireless system according to an embodiment of the present invention;

3 is a flowchart of a method for adaptive retransmission scheduling of a wireless system according to an embodiment of the present invention;

FIG. 4 is a block diagram of a wireless system adaptive retransmission scheduling apparatus according to an embodiment of the present invention.

detailed description

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

In the embodiment of the present invention, if the demodulation data block of the receiving end is in error, the transmitting end acquires the demodulation and decoding loss of the data block by the receiving end, and combines the solution. The amount of decoding loss is allocated to the data block to retransmit the resource, so that the allocated retransmission resource is more accurate, thereby improving the utilization of the transmission resource.

Referring to FIG. 1, FIG. 1 is a structural block diagram of a transmitting end according to an embodiment of the present invention. The transmitting end may generate a large difference due to different configurations or performances, and may include one or more processors 101 and transmitters 102.

The processor 101 is configured to: if the receiving end demodulates the data block, obtain the demodulation and decoding loss of the data block by the receiving end;

The processor 101 is further configured to allocate a retransmission resource to the data block according to the demodulation decoding loss amount and the current channel information of the receiving end;

The transmitter 102 is configured to retransmit the data block by using the retransmission resource.

Optionally, the transmitting end may include other components in addition to the processor 101 and the transmitter 102 described above. For example, memory 103, one or more storage media 106 storing application 104 or data 105 (eg, one or one storage device in Shanghai) may also be included. Among them, the memory 103 and the storage medium 106 may be short-term storage or persistent storage. The program stored on storage medium 106 may include one or more modules (not shown), each of which may include a series of instruction operations in a device for power distribution. Still further, the processor 101 can be arranged to communicate with the storage medium 106 to perform a series of instruction operations in the storage medium 106 on the transmitting end.

The transmitting end may also include one or more power sources 107, one or more wired or wireless network interfaces 108, one or more input and output interfaces 109, one or more keyboards 110, and/or one or more operating systems 111. For example, Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM, etc.

In the present invention, the transmitting end including the processor 101 and the transmitter 102 may also have the following functions:

The processor 101 is further configured to acquire scheduling information when the data block is initially transmitted, and obtain, according to the scheduling information, a first spectrum efficiency and a first resource block RB number when the data block is initially transmitted; and according to the demodulation state information of the receiving end. And obtaining a second spectral efficiency that the receiving end initially receives the data block; and calculating, according to the first spectral efficiency, the first RB number, and the second spectral efficiency, a demodulation decoding loss amount that the receiving end demodulates the data block.

Optionally, the processor 101 is further configured to receive, when the receiving end sent by the receiving end initially receives the data block, a CQI (Channel Quality Indicator), according to the CQI, acquiring a second spectrum efficiency corresponding to the CQI; or

The processor 101 is further configured to acquire, according to a modulation and coding scheme (MCS) of the data block when the data block is initially transmitted, a second spectrum efficiency that the receiving end initially receives the data block.

Optionally, the processor 101 is further configured to receive a spectrum loss amount of the data block sent by the receiving end, obtain a first RB quantity when the data block is initially transmitted, and calculate and receive according to the spectrum loss amount and the first RB number. The terminal demodulates the amount of demodulation and decoding loss of the data block.

Optionally, the retransmission resource includes an RB and an MCS value;

The processor 101 is further configured to calculate a current third spectrum efficiency and an MCS value of the receiving end according to the current channel information of the receiving end, and calculate a second retransmission of the data block according to the demodulated decoding loss amount and the third spectral efficiency. The number of RBs; according to the MCS value and the second number of RBs, the data block is allocated a retransmission resource.

An embodiment of the present invention provides a wireless system adaptive retransmission scheduling method, where the execution body of the method is a transmitting end; see 2-1, the method includes:

Step 201: If the receiving end demodulates the data block, the transmitting end acquires the scheduling information when the data block is initially transmitted, and obtains the first spectral efficiency and the first RB number when the data block is initially transmitted according to the scheduling information.

This step can be implemented by the following steps (1) to (3), including:

(1): The transmitting end receives the NACK feedback information corresponding to the data block sent by the receiving end, and determines, according to the NACK feedback information, that the receiving end demodulates the data block.

When the transmitting end sends data to the receiving end, the data is divided into a plurality of data blocks, and each of the plurality of data blocks is sequentially sent to the receiving end; the receiving end sequentially receives each data block sent by the transmitting end.

For each data block, if the receiving end demodulates the data block error, the NACK (negative response) feedback information corresponding to the data block is sent to the transmitting end; the transmitting end receives the data block pair sent by the receiving end. The NACK feedback information is determined, and according to the NACK feedback information, it is determined that the receiving end demodulates the data block error.

Further, if the receiving end successfully demodulates the data block, the receiving end sends the ACK (acknowledgement) feedback information corresponding to the data block to the transmitting end, and the sending end receives the ACK feedback information corresponding to the data block sent by the receiving end. And determining, according to the ACK feedback information, that the receiving end successfully demodulates the data block.

The transmitting end may be a terminal or a base station; the receiving end may also be a terminal or a base station; and when the transmitting end is a terminal, the receiving end is a base station; when the transmitting end is a base station, the receiving end is a terminal.

(2): The transmitting end acquires scheduling information when the data block is initially transmitted according to the data block identifier of the data block.

When the sending end initially sends a data block to the receiving end, the scheduling information is allocated to the data block, and the scheduling information includes the MCS value and the number of RBs; and the corresponding relationship between the data block identifier and the scheduling information of the data block is stored.

Correspondingly, this step can be:

The NACK feedback message includes a data block identifier of the data block, and the sending end acquires a data block identifier of the data block from the NACK feedback message, and according to the data block identifier of the data block, a correspondence between the data block identifier and the scheduling information Obtain the scheduling information when the data block is first transmitted.

The data block identifier may be a data block number, a process number, or a TB (Transport Block).

It should be noted that, in this step, the scheduler in the wireless system may obtain the scheduling information of the data block according to the data block identifier of the data block according to the above steps, and send the scheduling information to the sending end; The terminal receives the scheduling information of the initial transmission of the data block sent by the scheduler.

(3): The transmitting end acquires the first spectrum efficiency and the first RB number when the data block is initially transmitted according to the scheduling information.

The transmitting end acquires, according to the MCS value included in the scheduling information, the spectrum efficiency corresponding to the MCS value from the correspondence between the MCS value and the spectrum efficiency as the first spectrum efficiency when the data block is initially transmitted; the number of RBs included in the scheduling information It is called the first RB number.

For example, the MCS value included in the scheduling information is converted into a first spectral efficiency Se _initTx . The number of PRBs included in the scheduling information is referred to as Prb0.

It should be noted that, in this step, the first spectrum efficiency and the first RB number of the initial transmission of the data block may be obtained by the scheduler in the wireless system according to the scheduling information according to the foregoing steps; Sending the first spectrum efficiency and the first RB number, the transmitting end receives the first spectrum efficiency and the first RB number sent by the scheduler.

Step 202: The transmitting end acquires a second spectrum efficiency that the receiving end initially receives the data block according to the demodulation state information of the receiving end.

The demodulation state information includes the CQI and/or the MSC. This step may be implemented by the following first mode or the second mode. For the first implementation manner, the receiving end feeds back the CQI of the initial transmission of the data block. for:

The transmitting end receives the CQI when the receiving end sent by the receiving end initially receives the data block, and acquires the second spectrum efficiency corresponding to the CQI according to the CQI.

When the transmitting end initially transmits the data block, the receiving end receives the data block initially transmitted by the transmitting end, and acquires the current CQI, where the CQI is the CQI when the receiving end initially receives the data block; if the receiving end demodulates the data block If the error occurs, the CQI is sent to the sender; the sender receives the CQI sent by the receiver.

The corresponding relationship between the CQI and the frequency efficiency is stored in the sending end. Correspondingly, the step of obtaining the second spectral efficiency corresponding to the CQI by the sending end according to the CQI may be:

The transmitting end acquires, according to the CQI, the spectral efficiency corresponding to the CQI from the correspondence between the CQI and the spectral efficiency as the second spectral efficiency at which the receiving end initially receives the data block.

For the second implementation manner, the second spectrum efficiency is directly estimated by the transmitting end according to the scheduling information, and does not depend on the feedback of the receiving end. This step may be:

The transmitting end acquires the second spectrum efficiency that the receiving end initially receives the data block according to the MCS value at the time of initial transmission of the data block.

For each data block, when the transmitting end sends the data block to the receiving end, the current MCS value is obtained, that is, the MCS value at the time of the initial transmission of the data block, and the corresponding relationship between the identifier of the data block and the MCS value is stored; This step can be:

The transmitting end acquires the MCS value of the initial transmission of the data block from the correspondence between the data block identifier and the MCS value according to the identifier of the data block. According to the MCS value, the second spectrum efficiency of the receiving end initially receiving the data block is obtained.

The step of obtaining, by the sending end, the second spectrum efficiency of the receiving end initially receiving the data block according to the MCS value may be:

The transmitting end determines, according to the MCS value, the MCS value when the receiving end initially receives the data block, and obtains the MCS value when the receiving end initially receives the data block, and obtains the correspondence between the MCS value and the spectrum efficiency. Taking the second spectral efficiency of the data block initially received by the receiving end.

The sending end stores a function between the MCS value of the transmitting end and the MCS value of the receiving end. Correspondingly, the sending end determines, according to the MCS value, the MCS value when the receiving end initially receives the data block:

The transmitting end calculates the MCS value when the receiving end initially receives the data block according to the MCS value and the function.

It should be noted that, in this step, the scheduler may obtain the second spectrum efficiency of the initial reception of the data block by the receiving end according to the demodulation state information of the receiving end, and send the second spectrum efficiency to the transmitting end; The terminal receives the second spectral efficiency sent by the scheduler.

Step 203: The transmitting end calculates, according to the first spectrum efficiency, the first RB number, and the second spectrum efficiency, a demodulation decoding loss amount that the receiving end demodulates the data block.

The transmitting end calculates a spectral difference between the first spectral efficiency and the second spectral efficiency, calculates a product of the spectral difference and the number of the first RB, and uses the product as a receiving end to demodulate the demodulated decoding loss of the data block, specifically See the following formula (1)

SS=(Se _initTx -Se _initRx )×Prb0 formula (1)

SS is the demodulation decoding loss, Se _initTx is the first spectral efficiency, Se _initRx is the second spectral efficiency, and Prb0 is the first RB number.

It should be noted that, in this step, the scheduler may calculate the demodulation and decoding loss amount of the data block by the receiving end according to the first spectrum efficiency, the first RB number, and the second spectrum efficiency according to the above steps. The demodulation decoding loss amount is transmitted to the transmitting end, and the transmitting end receives the demodulation decoding loss amount transmitted by the demodulator.

Step 204: The transmitting end retransmits the resource for the data block according to the demodulation decoding loss amount and the current channel information of the receiving end.

Retransmitted resources include RB and MCS values. Correspondingly, this step can be implemented by the following steps (1) to (3), including:

(1): The transmitting end calculates the current third spectrum efficiency and MCS value of the receiving end according to the current channel information of the receiving end.

The channel information includes a CQI; the receiving end acquires the current CQI, and sends the CQI to the transmitting end; the transmitting end receives the CQI sent by the receiving end, and according to the CQI, obtains the spectrum efficiency corresponding to the CQI from the correspondence between the CQI and the spectrum efficiency. The current third spectrum efficiency of the receiving end is obtained by the transmitting end according to the CQI, and the current MCS value of the receiving end is obtained from the correspondence between the MCS value and the CQI.

(2): The transmitting end calculates the number of second RBs when the data block is retransmitted according to the demodulation decoding loss amount and the third spectrum efficiency.

The transmitting end calculates a ratio of the demodulated decoding loss amount to the third spectral efficiency, and uses the ratio as the number of second RBs when the data block is retransmitted. For details, refer to the following formula (2):

Wherein, PRb1 is the second RB number, and SS is the demodulation decoding loss amount. Se _reRx is the third spectral efficiency.

(3): The transmitting end allocates a retransmission resource for the data block according to the MCS value and the second RB number.

The transmitting end allocates the MCS corresponding to the MCS value for the data block, and allocates a second RB number of RB blocks for the data block.

Step 205: The transmitting end retransmits the data block by using the retransmission resource.

The transmitting end retransmits the data block to the receiving end by using the retransmission resource; the receiving end receives the data block sent by the transmitting end, and re-demodulates the data block.

Further, in order to improve transmission efficiency, in this step, the transmitting end may not transmit the data block to the receiving end, but transmit the demodulation and decoding loss amount to the receiving end through the retransmission resource; the receiving end receives the transmitting end. The demodulated decoding loss amount is transmitted, and the data block is demodulated according to the initially received data block and the demodulation decoding loss amount.

For example, referring to Figure 2-2, the transmitting end initially sends a data block to the receiving end, and the receiving end demodulates the data block. The transmitting end calculates the demodulation and decoding loss of the data block by the receiving end, and combines the demodulation and translation. The code loss amount allocates a retransmission resource to the data block, and the transmitting end only transmits the demodulation and decoding loss amount to the receiving end through the retransmission resource. The receiving end successfully demodulates the data block according to the stored initial received data block and the demodulated decoding loss. Since the demodulation decoding loss amount is transmitted only to the receiving end, transmission redundancy is reduced, and transmission efficiency is improved.

An embodiment of the present invention provides a wireless system adaptive retransmission scheduling method, where the execution body of the method is a transmitting end; see 3, the method includes:

Step 301: If the receiving end demodulates the data block, the transmitting end receives the spectrum loss amount of the data block sent by the receiving end.

For each data block, if the receiving end demodulates the data block, the NACK feedback information corresponding to the data block is sent to the transmitting end; the receiving end receives the NACK feedback information corresponding to the data block sent by the transmitting end, and according to the NACK The feedback information determines that the receiving end demodulates the data block.

If the receiving end demodulates the data block error, the receiving end calculates the spectrum loss amount of the data block, and sends the spectrum loss amount to the transmitting end, and the transmitting end receives the spectrum loss amount sent by the receiving end.

The receiving end may send the spectrum loss amount to the transmitting end by multiplexing the associated channel control signaling, which may be:

The receiving end sends the associated channel control signaling to the transmitting end, where the associated channel control signaling includes the spectrum loss amount.

The receiving end may calculate the spectrum loss amount of the data block by using the following steps (1) to (4), including:

(1): The receiving end receives the MCS value sent by the transmitting end.

When the transmitting end determines that the receiving end demodulates the data block, the transmitting end acquires the data block identifier of the data block from the NACK feedback information, and obtains the corresponding relationship between the data block identifier and the scheduling information according to the data block identifier. Scheduling information when the data block is first transmitted. The scheduling information includes the MCS value and the number of RBs. The sending end sends the MCS value to the receiving end; the receiving end receives the MCS value sent by the sending end.

The data block identifier can be a data block number, a process number, or a TB.

(2): The receiving end acquires the first spectrum efficiency corresponding to the MCS value according to the MCS value.

The receiving end stores the correspondence between the MCS value and the spectrum efficiency. Correspondingly, this step can be:

The receiving end acquires the first spectrum efficiency corresponding to the MCS value from the correspondence between the MCS value and the spectrum efficiency according to the MCS value.

(3): The receiving end acquires the second spectrum efficiency of initially receiving the data block according to the demodulation state information.

The demodulation state information includes a CQI; when receiving the data block, the receiving end acquires a CQI when the data block is received, and according to the CQI, obtains a second spectrum efficiency of initially receiving the data block from a correspondence between the CQI and the spectral efficiency.

(4): The receiving end calculates a spectrum loss amount of demodulating the data block according to the first spectral efficiency and the second spectral efficiency.

The receiving end calculates a spectral difference between the first spectral efficiency and the second spectral efficiency, and uses the spectral difference as a spectrum loss amount for demodulating the data block.

Step 302: The sender acquires the first number of RBs when the data block is initially transmitted.

For the step of obtaining the first RB number when the data block is sent by the sending end, refer to step 201, and details are not described herein again.

Step 303: The transmitting end calculates, according to the spectrum loss amount and the first RB number, a demodulation and decoding loss amount that the receiving end demodulates the data block.

The transmitting end calculates a product of the amount of spectrum loss and the number of first RBs, and uses the product as a demodulation and decoding loss amount of the data block by the receiving end.

Step 304: The transmitting end retransmits the resource for the data block according to the demodulation decoding loss amount and the current channel information of the receiving end.

The channel information includes a CQI; the receiving end acquires the current CQI, and sends the CQI to the transmitting end; the transmitting end receives the CQI sent by the receiving end, and according to the CQI, obtains the spectrum efficiency corresponding to the CQI from the correspondence between the CQI and the spectrum efficiency. The current third spectrum efficiency of the receiving end is obtained by the transmitting end according to the CQI, and the current MCS value of the receiving end is obtained from the correspondence between the MCS and the CQI.

The transmitting end calculates a ratio of the demodulated decoding loss amount to the third spectral efficiency, and uses the ratio as the number of second RBs when the data block is retransmitted.

Step 305: The transmitting end retransmits the data block by using the retransmission resource.

An embodiment of the present invention provides a wireless system adaptive retransmission scheduling apparatus. Referring to FIG. 4, the apparatus includes:

The obtaining module 401 is configured to: if the receiving end demodulates the data block, obtain the demodulation and decoding loss of the data block by the receiving end;

The allocating module 402 is configured to allocate a retransmission resource to the data block according to the demodulation decoding loss amount and the current channel information of the receiving end;

The transmitting module 403 is configured to retransmit the data block by using the retransmission resource.

Optionally, the obtaining module 401 is further configured to obtain scheduling information when the data block is initially transmitted, and obtain, according to the scheduling information, a first spectrum efficiency and a number of first resource blocks RB when the data block is initially transmitted; Demodulating the state information, obtaining a second spectral efficiency at which the receiving end initially receives the data block; and calculating a demodulation and decoding loss amount of the demodulated data block at the receiving end according to the first spectral efficiency, the first RB number, and the second spectral efficiency.

Optionally, the obtaining module 401 is further configured to: receive, by the receiving end, the channel quality indicator CQI when the receiving end initially receives the data block, and obtain the second spectrum efficiency corresponding to the CQI according to the CQI; or

The obtaining module 401 is further configured to obtain, according to the modulation and coding mode MCS when the data block is initially transmitted, the second spectral efficiency that the receiving end initially receives the data block.

Optionally, the obtaining module 401 is further configured to receive a spectrum loss amount of the data block sent by the receiving end, obtain a first RB number when the data block is initially transmitted, and calculate and receive according to the spectrum loss amount and the first RB number. The terminal demodulates the amount of demodulation and decoding loss of the data block.

Optionally, the retransmission resource includes an RB and an MCS value;

The allocating module 402 is further configured to calculate a current third spectrum efficiency and an MCS value of the receiving end according to the current channel information of the receiving end, and calculate a second retransmission of the data block according to the demodulated decoding loss amount and the third spectral efficiency. The number of RBs; according to the MCS value and the second number of RBs, the data block is allocated a retransmission resource.

It should be noted that, in the wireless system adaptive retransmission scheduling, the wireless system adaptive retransmission scheduling apparatus in the foregoing embodiment is only illustrated by the division of the foregoing functional modules. In actual applications, the foregoing may be performed according to requirements. The function assignment is done by different functional modules, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. In addition, the wireless system adaptive retransmission scheduling apparatus and the wireless system adaptive retransmission scheduling method are provided in the same embodiment, and the specific implementation process is described in detail in the method embodiment, and details are not described herein again.

A person skilled in the art may understand that all or part of the steps of implementing the above embodiments may be completed by hardware, or may be instructed by a program to execute related hardware, and the program may be stored in a computer readable storage medium. The storage medium mentioned may be a read only memory, a magnetic disk or an optical disk or the like.

The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalents, improvements, etc., which are within the spirit and scope of the present invention, should be included in the protection of the present invention. Within the scope.

Claims

A wireless system adaptive retransmission scheduling method, the method comprising:

If the receiving end demodulates the data block, the transmitting end acquires the demodulation and decoding loss amount of the data block to be demodulated by the receiving end;

The transmitting end allocates a retransmission resource to the data block according to the demodulation decoding loss amount and the current channel information of the receiving end;

The transmitting end retransmits the data block by using the retransmission resource.
The method according to claim 1, wherein the transmitting end acquires a demodulation and decoding loss amount of the data block to be demodulated by the receiving end, and includes:

And acquiring, by the sending end, scheduling information when the data block is initially transmitted, and acquiring, according to the scheduling information, a first spectrum efficiency and a number of first resource blocks RB when the data block is initially transmitted;

The transmitting end acquires, according to the demodulation state information of the receiving end, a second spectrum efficiency that the receiving end initially receives the data block;

And the transmitting end calculates, according to the first spectrum efficiency, the first RB number, and the second spectrum efficiency, a demodulation and decoding loss amount of the data block to be demodulated by the receiving end.
The method according to claim 2, wherein the transmitting end acquires, according to the demodulation state information of the receiving end, the second spectrum efficiency of the receiving end initially receiving the data block, including:

The transmitting end receives a channel quality indicator CQI that is received by the receiving end when the receiving end initially receives the data block, and acquires a second spectrum efficiency corresponding to the CQI according to the CQI; or

The transmitting end acquires a second spectrum efficiency that the receiving end initially receives the data block according to the modulation and coding mode MCS when the data block is initially transmitted.
The method according to claim 1, wherein the transmitting end acquires a demodulation and decoding loss amount of the data block to be demodulated by the receiving end, and includes:

Receiving, by the transmitting end, a spectrum loss amount of the data block sent by the receiving end;

The sending end acquires the first RB number when the data block is initially transmitted;

The transmitting end calculates the demodulation of the receiving end according to the amount of spectrum loss and the number of the first RB The amount of demodulation decoding loss of the data block.
The method according to claim 1, wherein the retransmission resource comprises an RB and an MCS value;

And the transmitting end allocates a retransmission resource to the data block according to the demodulation and decoding loss amount and the current channel information of the receiving end, including:

The transmitting end calculates a current third spectrum efficiency and an MCS value of the receiving end according to the current channel information of the receiving end;

Calculating, according to the demodulation decoding loss amount and the third spectral efficiency, a number of second RBs for retransmitting the data block;

And allocating a retransmission resource to the data block according to the MCS value and the second RB number.
A wireless system adaptive retransmission scheduling apparatus, characterized in that the apparatus comprises:

An obtaining module, configured to: if the receiving end demodulates a data block error, obtain a demodulation and decoding loss amount of the data block to be demodulated by the receiving end;

An allocating module, configured to allocate a retransmission resource to the data block according to the demodulation decoding loss amount and current channel information of the receiving end;

And a transmission module, configured to retransmit the data block by using the retransmission resource.
The device of claim 6 wherein:

The acquiring module is further configured to acquire scheduling information when the data block is initially transmitted, and obtain, according to the scheduling information, a first spectrum efficiency and a number of first resource blocks RB when the data block is initially transmitted; Decoding state information of the receiving end, acquiring a second spectral efficiency that the receiving end initially receives the data block; and calculating, according to the first spectral efficiency, the first RB number, and the second spectral efficiency The receiving end demodulates the demodulation decoding loss amount of the data block.
The device of claim 7 wherein:

The acquiring module is further configured to receive a channel quality indicator CQI that is sent by the receiving end when the receiving end initially receives the data block, and acquire a second spectrum efficiency corresponding to the CQI according to the CQI; or

The acquiring module is further configured to acquire, according to a modulation and coding mode MCS when the data block is initially transmitted, a second spectrum efficiency that the receiving end initially receives the data block.
The device of claim 6 wherein:

The acquiring module is further configured to receive a spectrum loss amount of the data block sent by the receiving end, acquire a first RB number when the data block is initially transmitted, and obtain the first RB according to the spectrum loss amount and the first RB. And calculating a demodulation decoding loss amount of the data block to be demodulated by the receiving end.
The apparatus according to claim 6, wherein the retransmission resource comprises an RB and an MCS value;

The allocating module is further configured to calculate a current third spectrum efficiency and an MCS value of the receiving end according to the current channel information of the receiving end, and calculate according to the demodulated decoding loss amount and the third spectral efficiency. Retransmitting the second RB number of the data block; allocating retransmission resources to the data block according to the MCS value and the second RB number.
A wireless system adaptive retransmission scheduling apparatus, characterized in that the apparatus comprises:

a processor, configured to: if the receiving end demodulates a data block error, obtain a demodulation and decoding loss amount of the data block to be demodulated by the receiving end;

The processor is further configured to allocate a retransmission resource to the data block according to the demodulation decoding loss amount and current channel information of the receiving end;

a transmitter, configured to retransmit the data block by using the retransmitted resource.
The device of claim 11 wherein:

The processor is further configured to acquire scheduling information when the data block is initially transmitted, and obtain, according to the scheduling information, a first spectrum efficiency and a number of first resource blocks RB when the data block is initially transmitted; Decoding state information of the receiving end, acquiring a second spectral efficiency that the receiving end initially receives the data block; and calculating, according to the first spectral efficiency, the first RB number, and the second spectral efficiency The receiving end demodulates the demodulation decoding loss amount of the data block.
The device according to claim 12, characterized in that

The processor is further configured to receive, by the receiving end, a channel quality indicator (CQI) when the receiving end initially receives the data block, and acquire, according to the CQI, a second spectrum efficiency corresponding to the CQI; or

The processor is further configured to acquire, according to a modulation and coding mode MCS when the data block is initially transmitted, a second spectrum efficiency that the receiving end initially receives the data block.
The device of claim 11 wherein:

The processor is further configured to receive a spectrum loss amount of the data block sent by the receiving end, acquire a first RB number when the data block is initially transmitted, and obtain the first RB according to the spectrum loss amount and the first RB And calculating a demodulation decoding loss amount of the data block to be demodulated by the receiving end.
The apparatus according to claim 11, wherein the retransmission resource comprises an RB and an MCS value;

The processor is further configured to calculate, according to current channel information of the receiving end, a current third spectrum efficiency and an MCS value of the receiving end; and calculate, according to the demodulated decoding loss amount and the third spectral efficiency, Retransmitting the second RB number of the data block; allocating retransmission resources to the data block according to the MCS value and the second RB number.