WO2023273944A1 - Phr retransmission failure handling method, base station, terminal, electronic device, and storage medium - Google Patents

Abstract

Embodiments of the present application relate to the field of wireless network communications. Disclosed are a power headroom report (PHR) retransmission failure handling method, a base station, a terminal, an electronic device, and a storage medium. The PHR retransmission failure handling method comprises: upon detecting that a PHR last retransmitted by the terminal fails to be retransmitted, the base station sends to the terminal downlink control information (DCI) carrying indication information of a PHR reporting failure, so that the terminal determines whether the last retransmitted PHR fails to be reported.

Description

PHR retransmission failure processing method, base station, terminal, electronic equipment, and storage medium

cross reference

This application is based on the Chinese patent application with the application number "202110721948.6" and the filing date is June 28, 2021, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated by reference. Application.

technical field

The present application relates to the field of wireless network communication, in particular to a method for processing PHR retransmission failure.

Background technique

In a wireless network communication system, it is necessary to accurately estimate the quality of the uplink channel for functions such as uplink AMC (Adaptive Modulation and Coding, adaptive modulation and coding) or uplink power control, and a very important parameter for uplink channel quality estimation is The PH (Power Headroom, power headroom) reported by the terminal is the difference between the maximum transmission power allowed by the terminal and the currently evaluated PUSCH (Physical uplink shared channel, physical uplink shared channel) transmission power.

In the current wireless communication system, there are many ways to trigger PHR (Power Headroom Report, power headroom report) reporting, including periodic triggering, path loss change event triggering, reconfiguration PHR function or parameter triggering, etc., and between the terminal and the base station There is a retransmission mechanism for data transmission: HARQ (Hybrid Automatic Repeat reQuest, hybrid automatic repeat request), so that the terminal can retransmit the PHR after failing to report the PHR.

However, the inventors of this application found that due to the influence of the channel quality of the uplink air interface, triggering the PHR report in the above-mentioned various ways does not guarantee that the PHR reported by the terminal can be correctly resolved by the base station. Even if there is a retransmission mechanism, it still cannot guarantee that the base station will The correct PHR can be resolved through the retransmission of the terminal. However, if the base station cannot resolve the correct PHR, it will lead to the inability to estimate the uplink channel quality at the current moment, which will affect the accuracy of the uplink channel for a period of time. We can only expect the terminal to trigger the PHR report next time to correct the uplink channel quality estimation. However, during the period before receiving the next reported PHR, the base station cannot correctly estimate the channel quality, thereby affecting the uplink rate of the terminal, or causing rate jitter.

Contents of the invention

The embodiment of the present application provides a method for processing PHR retransmission failure, which is applied to the base station, including: receiving the power headroom report PHR of the last retransmission of the terminal; if it is detected that the last retransmission of the PHR fails, send The indication information of the PHR reporting failure is carried in the extended field of downlink control information DCI (Downlink Control Information, carried by the downlink physical control channel, and sent to the user, including uplink and downlink resource allocation, power control, etc.); Sending the DCI carrying the indication information of the PHR reporting failure to the terminal.

The embodiment of the present application also provides a method for processing PHR retransmission failure, which is applied to the terminal, including: receiving the downlink control information DCI issued by the base station; The extension field is used to determine whether the last retransmitted power headroom report PHR fails to be reported.

The embodiment of the present application also provides a base station, including: a receiving module, configured to receive the power headroom report PHR of the terminal's last retransmission; an indication module, configured to, after detecting that the PHR fails the last retransmission, Carrying the indication information of the PHR reporting failure in the extension field of the downlink control information DCI; the sending module is configured to send the DCI carrying the indication information of the PHR reporting failure to the terminal.

The embodiment of the present application also provides a terminal, including: a receiving module, configured to receive the downlink control information DCI issued by the base station; an analyzing module, configured to analyze the DCI, according to the The extension field is used to determine whether the last retransmitted power headroom report PHR fails to be reported.

An embodiment of the present application also provides an electronic device, including: at least one processor; and a memory connected in communication with the at least one processor; wherein, the memory stores information that can be executed by the at least one processor. An instruction, the instruction is executed by the at least one processor, so that the at least one processor can execute the above-mentioned processing method for the PHR retransmission failure applied to the base station, or can execute the PHR retransmission failure applied to the terminal processing method.

Embodiments of the present application also provide a computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, the above-mentioned processing method for PHR retransmission failure applied to a base station or a PHR retransmission method applied to a terminal is implemented. How to handle the failed transmission.

Description of drawings

One or more embodiments are exemplified by pictures in the accompanying drawings, and these exemplifications are not intended to limit the embodiments.

FIG. 1 is a flow chart of a method for processing PHR retransmission failure provided according to an embodiment of the present application;

Fig. 2 is a schematic diagram of reporting PHR in the current wireless communication system according to an embodiment of the present application;

FIG. 3 is a schematic diagram of the reporting principle of the PHR in the embodiment of the present application provided according to an embodiment of the present application;

FIG. 4 is a flow chart of a method for processing PHR retransmission failure according to another embodiment of the present application;

FIG. 5 is a schematic structural diagram of a base station provided according to the present application;

FIG. 6 is a schematic structural diagram of a terminal provided according to the present application;

Fig. 7 is a schematic structural diagram of an electronic device provided according to an embodiment of the present application.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that in each embodiment of the application, many technical details are provided for readers to better understand the application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in this application can also be realized.

An embodiment of the present application relates to a method for processing PHR retransmission failure, which is applied to the base station. In this embodiment, the base station receives the power headroom report PHR of the last retransmission of the terminal. If the last retransmission of the PHR is detected If it fails, the PHR reporting failure indication information is carried in the extension field of the downlink control information DCI, and the DCI carrying the PHR reporting failure indication information is sent to the terminal. By sending the downlink control information DCI carrying the indication information of PHR reporting failure to the terminal, the terminal can be notified of the result of this retransmission in time, so that the terminal can perform corresponding operations.

The implementation details of the processing method for PHR retransmission failure in this embodiment are described in detail below. The following content is only for the convenience of understanding the implementation details of this solution, and is not necessary for implementing this solution. The specific process is shown in Figure 1, and may include the following steps:

Step 101, the base station receives the last retransmitted PHR of the terminal.

Specifically, in a wireless communication system, the terminal always expects to make full use of the wireless channel to maximize its own transmission rate, which requires the base station to estimate the channel quality accurately at all times. Therefore, PHR as a channel The estimated important parameters appear to be particularly important. However, due to the influence of the channel quality of the uplink air interface, it cannot guarantee that the PHR reported by the terminal can be correctly analyzed by the base station, so it is necessary to continuously retransmit the PHR to ensure the correct transmission of data. The data transmission between the terminal and the base station has a retransmission mechanism, but the number of retransmissions is generally only 4 times, and the fourth retransmission of the terminal received by the base station is the last retransmission. The PHR received by the base station is calculated by the terminal according to the difference between the allowed maximum transmission power and the currently estimated PUSCH data, where the PUSCH data is the transmission power of the physical uplink shared channel.

In step 102, the base station checks whether the retransmission of the last retransmitted PHR fails. If the retransmission fails, the procedure ends. If the retransmission fails, the process proceeds to step 103.

In step 103, the base station carries the indication information of PHR reporting failure in the extension field of the downlink control information DCI.

Specifically, before receiving the power headroom report PHR of the last retransmission of the terminal, the base station may add an extension field "HARQ result" in the DCI of the base station in advance to indicate the result of the last retransmission of the PHR, and The extended field of DCI is initialized, for example, the field "HARQ result" is initialized to 0.

In one example, the field "HARQ result" is added to the DCI to indicate the HARQ transmission result, occupying 1 bit, and the value range: 0 to 1. The default value is 0, indicating that the HARQ result is normal. In this step, the value of the extension field is set to a value indicating that the PHR report failed, to indicate that the last PHR retransmission failed.

That is to say, if the base station receives the last retransmission of the HARQ process, it will determine the value of "HARQ result" according to the retransmission result of this time. If the retransmission result is ACK (Acknowledge character, confirmation character), the value of HARQ result is 0, indicating that the HARQ process is successful this time. If the retransmission result is NACK (Negative Acknowledgment, non-confirmation character), the value of HARQ result is 1, indicating that the HARQ process failed this time.

In step 104, the base station sends the DCI carrying the indication information of PHR reporting failure to the terminal.

In an example, the DCI is an uplink DCI carrying uplink authorization information, and the base station carries the indication information of PHR reporting failure in the uplink DCI and sends it to the terminal to instruct the terminal to pass the uplink authorization in the uplink DCI. Information reported to the PHR. Since the uplink DCI carries uplink authorization information at the same time, the terminal can report the PHR directly again without waiting, so that it can re-report the PHR to the base station in time, and can have a faster response to the indication of PHR reporting failure fed back by the base station.

In another example, the DCI is downlink DCI, and the base station sends the downlink DCI carrying the indication information of PHR reporting failure to the terminal, so as to notify the terminal that the last PHR retransmission failed. In the case of the last PHR retransmission failure, it may mean that the channel during this period may still be poor, and the instantaneous interference has not been eliminated, and the probability of re-reported PHR demodulation error is also higher. Therefore, the base station indicates to the terminal that the last retransmission of the PHR fails through the downlink DCI, so that the terminal may stagger the last interference period with a high probability, and improve the probability of successfully reporting the PHR.

In this embodiment, if the base station detects that the last retransmitted PHR is successful in step 102, the process ends. That is to say, after the base station detects that the last retransmitted PHR is successful, the base station can choose not to send DCI, that is, if the terminal does not receive DCI after the last retransmitted PHR, it knows that the PHR has been successfully uploaded to the base station.

However, in another embodiment, after the base station detects that the last retransmitted PHR is successful, it may carry the indication information of the success of the PHR report in the extension field of the DCI, and carry the PHR report success The DCI of the indication information is sent to the terminal. For example, setting the HARQ result to be 0 indicates that the HARQ process is successful this time, and sending the DCI including the HARQ result field with a value of 0 to the terminal. In one example, uplink DCI including a HARQ result field with a value of 0 may be sent to the terminal. In another example, downlink DCI including a HARQ result field with a value of 0 may be sent to the terminal to notify the terminal of the last A retransmitted PHR was successful.

Compared with the current PHR reporting mechanism shown in Figure 2, after each retransmission, if the base station does not receive the PHR, the terminal cannot know, and the base station needs to wait for the terminal to trigger the next PHR report according to the original strategy. This period of time will be relatively long, and the channel quality during this period cannot be accurately estimated. The reporting mechanism of the PHR in this embodiment is shown in Figure 3. After the last retransmission fails, the DCI of HARQ result=1 will indicate that the terminal fails to report the PHR. After obtaining this information, the terminal will choose to report the PHR immediately or Choose the opportunity to report the PHR again.

In some technologies, due to the limitations of the HARQ retransmission mechanism in the wireless communication system, it is impossible to report the failure of the terminal to report the PHR. The terminal can only wait for the next PHR report to be triggered by its original strategy. It will cause channel quality estimation inaccuracy within a period of time, thereby affecting the uplink rate of the terminal, or causing rate jitter. And after 4 retransmissions, according to the HARQ retransmission mechanism, the terminal will report failure information to the PHR because it cannot obtain the power headroom report of the last retransmission, even if the last retransmission fails, it will no longer report to the base station. For retransmission, the base station cannot obtain the PHR in time, resulting in the base station not being able to correctly estimate the channel quality, thereby affecting the uplink rate of the terminal, or causing rate jitter. However, in the method for processing PHR retransmission failure provided by the embodiment of the present application, after the terminal fails the last retransmission, the base station sends downlink control information DCI to the terminal to notify the terminal of the last retransmission result, and the terminal will After uploading the results, choose to retransmit the PHR immediately, or upload the PHR again at an opportunity. By opening the feedback channel, the terminal can understand the situation of the base station, and make up a PHR report in time after the PHR reception fails, so as to achieve the purpose of maintaining the channel quality in real time and ensure the maximum terminal rate and rate stability.

Another embodiment of the present application relates to a method for processing PHR retransmission failure, which is applied to a terminal, and the specific process is shown in FIG. 4 .

Step 401, the terminal receives the downlink control information DCI sent by the base station, and the DCI carries the indication information of PHR reporting failure.

Step 402, the terminal analyzes the DCI carrying the indication information of PHR reporting failure, and obtains the extended field in the DCI, so as to determine whether the last retransmitted power headroom report PHR fails to report.

In step 403, it is judged whether the last retransmission of the PHR fails, specifically, it may be determined by obtaining the value of the extended field HARQ result in the above-mentioned DCI.

In an example, if the value of HARQ result is 0, it means that the power headroom report PHR of the last retransmission is successfully reported, and other data strategies are selected. If the value of HARQ result is 1, it means that the power headroom report PHR of the last retransmission If the power headroom report PHR fails to be reported, go to step 404 .

Step 404: Determine the type of the DCI carrying the indication information of PHR reporting failure, and select a corresponding PHR reporting method according to the DCI type.

In an example, the DCI is an uplink DCI, and the terminal immediately reports the PHR to the base station through the uplink DCI carrying the indication information that the PHR report fails;

In another example, the DCI is a downlink DCI, and the terminal selects an opportunity to report the PHR through the downlink DCI carrying the indication information that the PHR report fails. It can be understood that the downlink DCI cannot authorize uplink scheduling, so when the uplink DCI carries PHR failure information, the UE (that is, the terminal) is authorized for uplink scheduling and can report PHR "immediately"; but when the downlink DCI carries PHR failure information, the UE cannot The uplink scheduling is directly authorized, so it is necessary to "choose an opportunity" to send the PHR after obtaining the authorization of the uplink scheduling (that is, after receiving the uplink DCI).

Compared with the existing PHR reporting mechanism, the PHR reporting failure processing method in this embodiment can analyze the downlink control information DCI issued by the base station, and determine the power margin of the last retransmission according to the value of the extended field of the DCI. Quantity report whether the PHR is successfully reported, and the PHR can be reported in time. In addition, this processing method is more flexible, and different reporting methods can be adopted according to the characteristics of the local channel. If the channel changes quickly and requires higher real-time channel quality estimation, you can choose the first example; if the channel is relatively stable, even if you wait for a period of time, the channel will not change significantly, you can choose the second example example.

The step division of the above various methods is only for the sake of clarity of description. During implementation, it can be combined into one step or some steps can be split and decomposed into multiple steps. As long as they include the same logical relationship, they are all within the scope of protection of this patent. ; Adding insignificant modifications or introducing insignificant designs to the algorithm or process, but not changing the core design of the algorithm and process are all within the scope of protection of this patent.

An embodiment of the present application relates to a base station, as shown in FIG. 5 , including: a receiving module 501 , an indicating module 502 , and a sending module 503 .

Specifically, the receiving module 501 is configured to receive the last retransmitted power headroom report PHR of the terminal. In one example, since the data transmission between the terminal and the base station has a retransmission mechanism, but the number of retransmissions is generally only 4 times, therefore, in this step, if the PHR reported by the terminal received by the base station is the fourth retransmission PHR, it is determined that the last retransmitted PHR of the terminal has been received.

The indication module 502 is configured to, after detecting that the last retransmission of the PHR fails, carry the indication information of the PHR reporting failure in the extension field of the downlink control information DCI. In one example, the field "HARQ result" is added to the downlink control information DCI to indicate the HARQ transmission result, occupying 1 bit, the value range: 0~1, and the default value is 0, indicating that the HARQ result is normal. By setting the value of the extension field to a value representing the failure of PHR reporting, it indicates that the last PHR retransmission failed.

The sending module 503 is configured to send the DCI carrying the indication information of the PHR reporting failure to the terminal. In an example, the DCI is uplink DCI, and the base station sends the uplink DCI carrying the indication information of the PHR report failure to the terminal, instructing the terminal to report the PHR through the uplink authorization information; In another example, the DCI is downlink DCI, and the base station sends the downlink DCI carrying the indication information that the PHR report fails to the terminal.

It is not difficult to find that this embodiment is an apparatus embodiment corresponding to the above-mentioned method embodiment applied to a base station, and this embodiment may be implemented in cooperation with the above-mentioned method embodiment applied to a base station. The relevant technical details mentioned in the above embodiments of the method applied to the base station are still valid in this embodiment, and are not repeated here to reduce repetition. Correspondingly, the relevant technical details mentioned in this implementation manner may also be applied to the above-mentioned embodiment of the method applied to the base station.

An embodiment of the present application relates to a terminal, as shown in FIG. 6 , including: a receiving module 601 and an analyzing module 602 .

Specifically, the receiving module 601 is configured to receive the downlink control information DCI issued by the base station; the parsing module 602 is configured to parse the DCI, and determine the last retransmission according to the extended field in the DCI obtained by parsing Whether the power headroom report PHR fails to report.

In an example, the parsing module 602 is specifically configured to obtain the value of the extended field HARQ result in the downlink control information DCI issued by the base station. If the parsing results in HARQ result=1, it indicates the power headroom report of the last retransmission The PHR report fails; if the analysis results in HARQ result = 0, it means that the last retransmitted power headroom report PHR report is successful.

It is not difficult to find that this embodiment is an apparatus embodiment corresponding to the above-mentioned method embodiment applied to a terminal, and this embodiment may be implemented in cooperation with the above-mentioned method embodiment applied to a terminal. The relevant technical details mentioned in the above embodiments of the method applied to the terminal are still valid in this embodiment, and will not be repeated here to reduce repetition. Correspondingly, the relevant technical details mentioned in this implementation manner can also be applied to the above-mentioned embodiment of the method applied to the terminal.

It is worth mentioning that all the modules involved in the above two implementations of the present application are logical modules. In practical applications, a logical unit may be a physical unit, or a part of a physical unit, or Realized as a combination of multiple physical units. In addition, in order to highlight the innovative part of the present application, units that are not closely related to solving the technical problems proposed in the present application are not introduced in this embodiment, but this does not mean that there are no other units in this embodiment.

An embodiment of the present application relates to an electronic device, as shown in FIG. 7 , including at least one processor 701; and a memory 702 communicatively connected to at least one processor 701; wherein, the memory 702 stores information that can be processed by at least one The instructions executed by the processor 701 are executed by at least one processor 701, so that the at least one processor 701 can execute the above-mentioned PHR report failure identification method.

Wherein, the memory 702 and the processor 701 are connected by a bus, and the bus may include any number of interconnected buses and bridges, and the bus connects one or more processors 701 and various circuits of the memory 702 together. The bus may also connect together various other circuits such as peripherals, voltage regulators, and power management circuits, all of which are well known in the art and therefore will not be further described herein. The bus interface provides an interface between the bus and the transceivers. A transceiver may be a single element or multiple elements, such as multiple receivers and transmitters, providing means for communicating with various other devices over a transmission medium. The data processed by the processor 701 is transmitted on the wireless medium through the antenna, and further, the antenna also receives the data and transmits the data to the processor 701 .

The processor 701 is responsible for managing the bus and general processing, and may also provide various functions including timing, peripheral interface, voltage regulation, power management and other control functions. And the memory 702 may be used to store data used by the processor 701 when performing operations.

The above-mentioned products can execute the method provided in the embodiment of this application, and have corresponding functional modules and beneficial effects for executing the method. For technical details not described in detail in this embodiment, please refer to the method provided in the embodiment of this application.

The fourth embodiment of the present application relates to a computer-readable storage medium storing a computer program. The above method embodiments are implemented when the computer program is executed by the processor.

Those skilled in the art can understand that all or part of the steps in the method of the above-mentioned embodiments can be completed by instructing related hardware through a program, the program is stored in a storage medium, and includes several instructions to make a device (which can be A single chip microcomputer, a chip, etc.) or a processor (processor) executes all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disc, etc., which can store program codes. .

Those of ordinary skill in the art can understand that the above-mentioned implementation modes are specific examples for realizing the present application, and in practical applications, various changes can be made to it in form and details without departing from the spirit and spirit of the present application. scope.

Claims (10)

A method for processing PHR retransmission failure, applied to a base station, comprising: Receiving the power headroom report PHR retransmitted by the terminal for the last time; If it is detected that the last retransmission of the PHR fails, the indication information of the PHR reporting failure is carried in the extension field of the downlink control information DCI; Sending the DCI carrying the indication information of the PHR reporting failure to the terminal. The method for processing PHR retransmission failure according to claim 1, wherein the DCI is uplink DCI carrying uplink authorization information; The sending the DCI carrying the indication information of the PHR reporting failure to the terminal includes: Send the uplink DCI carrying the indication information that the PHR report fails to the terminal, instructing the terminal to report the PHR through the uplink authorization information; Alternatively, the DCI is a downlink DCI; and sending the DCI carrying the indication information of the PHR reporting failure to the terminal includes: Sending the downlink DCI carrying the indication information of the PHR reporting failure to the terminal. The method for processing OHR retransmission failure according to claim 1 or 2, wherein, before the power headroom report PHR retransmitted by the receiving terminal for the last time, further comprising: Initialize the extended field of the DCI; The indication information of failure to report the PHR is carried in the extension field of the downlink control information DCI, including: Set the value of the extension field to a value representing the failure of reporting the PHR. The method for processing PHR retransmission failure according to any one of claims 1 to 3, wherein, after the power headroom report PHR retransmitted by the receiving terminal for the last time, further comprising: If it is detected that the last retransmission of the PHR is successful, the indication information of the successful reporting of the PHR is carried in the extension field of the downlink control information DCI; Sending the DCI carrying the indication information indicating that the PHR is reported successfully to the terminal. A method for processing PHR retransmission failure, applied to a terminal, including: receiving downlink control information DCI issued by the base station; The DCI is analyzed, and according to the extended field in the DCI obtained by the analysis, it is determined whether the power headroom report PHR of the last retransmission fails to report. The method for processing PGHR retransmission failure according to claim 5, wherein the DCI is an uplink DCI carrying uplink authorization information; The processing method for the PHR retransmission failure also includes: If it is determined that the last retransmitted power headroom report PHR fails to be reported according to the extended field in the DCI obtained by parsing, report the PHR through the uplink grant information. A base station, comprising: A receiving module, configured to receive the power headroom report PHR of the last retransmission of the terminal; An indication module, configured to carry the indication information of the PHR reporting failure in the extended field of the downlink control information DCI after detecting that the PHR fails to be retransmitted the last time; A sending module, configured to send the DCI carrying the indication information of the PHR reporting failure to the terminal. A terminal comprising: A receiving module, configured to receive downlink control information DCI issued by the base station; The parsing module is configured to parse the DCI, and determine whether the last retransmitted power headroom report PHR fails to be reported according to the extended field in the DCI obtained through parsing. An electronic device comprising: at least one processor; and, A memory connected in communication with the at least one processor; wherein, the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processing The processor can execute the PHR retransmission failure processing method according to any one of claims 1 to 4, or enable the at least one processor to execute the PHR retransmission failure processing method according to claim 5 or 6 method. A computer-readable storage medium, storing a computer program, when the computer program is executed by a processor, the method for processing PHR retransmission failure according to any one of claims 1 to 4 is implemented; or, the implementation of claim 5 or The method for processing PHR retransmission failure described in 6.

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