CN110012491A - The method and network side equipment of SR false-alarm discovery - Google Patents

Abstract

The present invention provides a kind of SR false-alarm discovery method and network side equipments, belong to wireless technical field.Wherein, SR false-alarm finds method, is applied to network side equipment, comprising: the network side equipment judges whether the number for the BSR for sending BSR UL grant to user terminal and not being properly received user terminal response reaches preset maximum number of times of transmission；If sending BSR UL grant to user terminal and the number for not being properly received the BSR that user terminal responds reaching the maximum number of times of transmission, the network side equipment, which determines, occurs SR false-alarm.Technical solution of the present invention enables to network side equipment to find SR false-alarm problem, and then can be avoided waste of radio resources problem caused by SR false-alarm.

Description

SR false alarm detection method and network side equipment

technical field

The present invention relates to the field of wireless technology, in particular to a method and network side device for SR false alarm discovery.

Background technique

SR (Scheduling Request, uplink scheduling request) false alarm problem, that is, the UE (User Equipment, user terminal) did not send SR but the base station mistakenly thought that the UE sent it, so the base station will send an uplink transmission grant (UL Grant) to the UE to facilitate the UE Send BSR (Buffer Status Report, buffer status report).

When the SR false alarm problem occurs when the UE is configured with discontinuous reception (Discontinuous reception), the base station sends a UL Grant (hereinafter referred to as BSR UL Grant) to the UE for sending BSR through PDCCH (Physical Downlink Control Channel, Physical Downlink Control Channel). ), the UE is likely to be in a dormant state, so the UE will not receive the PDCCH nor send the BSR. The base station will receive the data sent by the UE on the uplink resource indicated by the BSR UL Grant, and when the decoding fails, the base station will send the BSR UL Grant to the UE again to indicate a retransmission operation.

In the existing network, if the base station does not receive the UE's BSR after issuing the BSR UL Grant, the base station will use pre-scheduling or compensation scheduling to continuously schedule the UE. For the SR false alarm problem, this will not only cause waste of wireless resources, but may also lead to inconsistent DRX (Discontinuous Reception, discontinuous reception) states between the base station and the terminal.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide an SR false alarm discovery method and a network side device, which can enable the network side device to discover the SR false alarm problem, thereby avoiding the waste of wireless resources caused by the SR false alarm.

In order to solve the above-mentioned technical problems, the embodiments of the present invention provide the following technical solutions:

On the one hand, a method for discovering SR false alarms is provided, which is applied to network-side devices, including:

The network side device determines whether the number of times that the BSR UL grant is sent to the user terminal and the BSR that the user terminal responds to is not correctly received reaches a preset maximum number of times of sending;

If the number of times of sending the BSR UL grant to the user terminal and not correctly receiving the BSR responded by the user terminal reaches the maximum number of sending times, the network side device determines that an SR false alarm occurs.

Further, after the network side device determines that an SR false alarm occurs, the method further includes:

The network side device no longer sends the BSR UL grant to the user terminal.

Further, before the network-side device judges whether the number of times that the BSR UL grant is sent to the user terminal and the BSR that the user terminal has not been correctly received reaches the preset maximum number of sending times, the method further includes:

The network-side device determines the maximum number of times of sending a BSR that sends a BSR UL grant and does not correctly receive a response from the user terminal.

Further, the maximum number of transmissions is equal to the maximum number of transmissions of the MSG3 message or the maximum number of HARQ transmissions.

Further, the network side device determines whether the number of times of sending the BSR UL grant to the user terminal and not correctly receiving the BSR responded by the user terminal reaches the preset maximum number of sending times, including:

The network side device sets a counter, and the initial value of the counter is 0;

The network side device receives the BSR in the current HARQ process, and if the BSR decoding fails or the BSR detection energy is not higher than the preset energy threshold value, the network side device increases the value of the counter by 1;

The network-side device determines whether the value of the counter reaches the maximum number of transmissions minus 1, and if the value of the counter reaches the maximum number of transmissions minus 1, the network-side device determines to send a BSR to the user terminal UL grant and the number of times of BSRs that are not correctly received by the user terminal response reaches the preset maximum number of sending times.

Further, in the process of receiving the BSR by the network side device in the current HARQ process, if the BSR decoding is successful or the BSR detection energy is higher than the preset energy threshold value, the network side device resets the value of the counter. Set to 0.

The embodiment of the present invention also provides a network side device, including a processor and a transceiver,

The processor is configured to determine whether the number of times of sending the BSR UL grant to the user terminal and not correctly receiving the BSR response from the user terminal reaches the preset maximum number of sending times; if the BSR UL grant is sent to the user terminal and the user terminal response is not correctly received. If the number of BSRs reaches the maximum number of sending times, it is determined that an SR false alarm occurs.

Further, the transceiver is configured to no longer send a BSRUL grant to the user terminal after it is determined that an SR false alarm occurs.

Further, the processor is further configured to determine the maximum number of times of sending the BSR for which the BSR UL grant is sent and the response of the user terminal is not correctly received.

Further, the maximum number of transmissions is equal to the maximum number of transmissions of the MSG3 message or the maximum number of HARQ transmissions.

Further, the processor is specifically configured to set a counter, and the initial value of the counter is 0;

The transceiver is specifically used to receive the BSR in the current HARQ process;

The processor is further configured to increase the value of the counter by 1 if the BSR decoding fails or the BSR detection energy is not higher than the preset energy threshold value; determine whether the value of the counter reaches the maximum number of transmissions minus 1 , if the value of the counter reaches the maximum number of sending times minus 1, it is determined that the number of times that the BSR UL grant is sent to the user terminal and the BSR that the user terminal responds to is not correctly received reaches the preset maximum number of sending times.

Further, the processor is further configured to reset the value of the counter to the value of the counter if the BSR decoding is successful or the BSR detection energy is higher than the preset energy threshold during the process of receiving the BSR by the transceiver. 0.

An embodiment of the present invention further provides a network-side device, including a memory, a processor, and a computer program stored on the memory and running on the processor; the processor implements the above when executing the program The SR false alarm detection method described above.

Embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, implements the steps in the above-mentioned SR false alarm detection method.

Embodiments of the present invention have the following beneficial effects:

In the above solution, in order to avoid the SR false alarm problem in the case of DRX, it can be solved by limiting the number of times the network side device sends the BSR UL Grant. When the network-side device sends the UL Grant for BSR reporting to the UE and the BSR that is not correctly received by the user terminal reaches a preset maximum number of sending times, it is considered that an SR false alarm problem has occurred, and then the network-side device will not Continue to send the UL Grant for BSR reporting for the UE, thereby avoiding the waste of radio resources caused by SR false alarms and the inconsistency of the DRX state between the network side equipment and the UE.

Description of drawings

Fig. 1 is the schematic diagram that the SR false alarm problem occurs in the prior art;

2 is a schematic flowchart of a method for detecting SR false alarms according to an embodiment of the present invention;

3 is a schematic diagram of finding an SR false alarm problem according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a network side device according to an embodiment of the present invention.

Detailed ways

In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention clearer, the following detailed description will be given in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1, in the existing network, if the base station does not receive the UE's BSR after issuing the BSR UL Grant, the base station will use pre-scheduling or compensation scheduling to continuously schedule the UE. For the SR false alarm problem, this will not only cause waste of radio resources, but may also lead to inconsistent DRX states between the base station and the terminal. The drx-InactivityTimer specifies the number of consecutive PDCCH subframes that remain in the active state after the UE successfully decodes a PDCCH indicating initially transmitted UL or DL user data. When the TB decoding of a certain downlink HARQ process fails, the UE can assume that there will be retransmission after at least HARQ RTT timer subframes, so when the HARQ RTT timer is running, the UE does not need to monitor the PDCCH. When the HARQ RTT timer times out and the data received by the corresponding HARQ process is not successfully decoded, the UE will start a drx-RetransmissionTimer for the HARQ process. When the timer is running, the UE will monitor the PDCCH for HARQ retransmission. D is a downlink subframe, S is a special subframe, and U is an uplink subframe.

In order to solve the above problem, the embodiments of the present invention provide an SR false alarm discovery method and a network side device, which can enable the network side device to discover the SR false alarm problem, thereby avoiding the waste of wireless resources caused by the SR false alarm.

An embodiment of the present invention provides an SR false alarm discovery method, which is applied to a network side device, as shown in FIG. 2 , including:

Step 101: the network side device determines whether the number of times that the BSR UL grant is sent to the user terminal and the BSR that the user terminal responds to is not correctly received reaches a preset maximum number of sending times;

Step 102: If the number of times of sending the BSR UL grant to the user terminal and not correctly receiving the BSR responded by the user terminal reaches the maximum number of sending times, the network side device determines that an SR false alarm occurs.

In this embodiment, in order to avoid the SR false alarm problem in the case of DRX, it can be solved by limiting the number of times the network side device sends the BSR UL Grant. When the network-side device sends the UL Grant for BSR reporting to the UE and the BSR that is not correctly received by the user terminal reaches a preset maximum number of sending times, it is considered that an SR false alarm problem has occurred, and then the network-side device will not Continue to send the UL Grant for BSR reporting for the UE, thereby avoiding the waste of radio resources caused by SR false alarms and the inconsistency of the DRX state between the network side equipment and the UE.

Wherein, the BSR that does not receive the response from the user terminal correctly includes the BSR that does not receive the response from the user terminal.

Even if it is not an SR false alarm problem, when the number of BSR UL Grant transmissions reaches the preset maximum number of transmissions, the network side device does not need to let the UE re-send the BSR, because the UE is likely to be in a weak coverage area.

Further, after the network side device determines that an SR false alarm occurs, the method further includes:

The network side device no longer sends the BSR UL grant to the user terminal.

Further, before the network-side device judges whether the number of times that the BSR UL grant is sent to the user terminal and the BSR that the user terminal has not been correctly received reaches the preset maximum number of sending times, the method further includes:

The network-side device determines the maximum number of times of sending a BSR that sends a BSR UL grant and does not correctly receive a response from the user terminal.

Further, the maximum number of transmissions is equal to the maximum number of transmissions of the MSG3 message or the maximum number of HARQ transmissions.

The MSG3 message is the third message exchanged between the user terminal and the network side device in the random access process. The maximum number of HARQ transmissions is applied to the uplink HARQ process of uplink data packets other than the MSG3 message. The uplink HARQ processing for MSG3 transmission is somewhat different from the normal HARQ processing. Therefore, a maximum number of transmissions is respectively designed for MSG3 messages and non-MSG3 uplink data during UL HARQ design.

Further, the network side device determines whether the number of times of sending the BSR UL grant to the user terminal and not correctly receiving the BSR responded by the user terminal reaches the preset maximum number of sending times, including:

The network side device sets a counter, and the initial value of the counter is 0;

The network side device receives the BSR in the current HARQ process, and if the BSR decoding fails or the BSR detection energy is not higher than the preset energy threshold value, the network side device adds 1 to the value of the counter; the HARQ process indicates that HARQ process, the current HARQ process indicates the HARQ process used by the network side device to send the BSR UL grant and the HARQ process used by the BSR;

The network-side device determines whether the value of the counter reaches the maximum number of transmissions minus 1, and if the value of the counter reaches the maximum number of transmissions minus 1, the network-side device determines to send a BSR to the user terminal UL grant and the number of times of BSRs that are not correctly received by the user terminal response reaches the preset maximum number of sending times.

Further, in the process of receiving the BSR by the network side device in the current HARQ process, if the BSR decoding is successful or the BSR detection energy is higher than the preset energy threshold value, the network side device resets the value of the counter. Set to 0.

The SR false alarm detection method of the present invention is described in detail below with reference to the accompanying drawings and specific embodiments. The SR false alarm detection method of the present embodiment specifically includes the following steps:

Step 1: The network-side device determines the maximum number of times maxBSRgrant-Tx for sending BSR UL Grants, and maintains a CURRENT_TX_BSRgrant state variable for each HARQ (Hybrid Automatic Repeat reQuest, hybrid automatic repeat request) process (process) that sends a BSR.

The initial value of the CURRENT_TX_BSRgrant counter is 0.

Step 2: The network side device receives the BSR in the current HARQ process. If the BSR decoding fails or the BSR detection energy is not higher than a preset energy threshold value, the network side device increases the CURRENT_TX_BSRgrant counter by 1, where the preset energy threshold value can be Set according to actual needs;

If CURRENT_TX_BSRgrant=maxBSRgrant-Tx-1, the network side device will no longer send the BSR grant to the UE in the current HARQ process. At this point, the network-side device considers that an SR false alarm problem has occurred.

Among them, the CURRENT_TX_BSRgrant state variable is counted as a continuous value. Once the network side device successfully decodes the BSR during the current HARQ process receiving the BSR or the BSR detection energy is higher than the preset energy threshold, the CURRENT_TX_BSRgrant counter will be reset to 0.

If UL HARQ is synchronous, maxBSRgrant-Tx needs to be consistent with maxHARQ-Msg3Tx (maximum number of MSG3 message transmissions)/maxHARQ-Tx (maximum number of retransmissions). The reason is that when the maximum number of retransmissions is reached, the UE will flush the buffer (refresh the buffer), and will naturally not send the BSR, and the network-side device will not receive the BSR. Before the maximum number of retransmissions is reached, the network side device must issue a UL Grant to avoid affecting UL HARQ retransmissions.

If UL HARQ is asynchronous, maxBSRgrant-Tx may be consistent with maxHARQ-Msg3Tx/maxHARQ-Tx, or may be other values.

In a specific example, the UL HARQ is asynchronous, and maxBSRgrant-Tx can be set to 2. As shown in FIG. 2 , in the same HARQ process, the network side device performs energy detection on the BSR sent by the UE. When the number of consecutive times that the BSR detects that the energy is not higher than the preset energy threshold value reaches 2, it is considered that an SR false alarm has occurred, so the UE is no longer scheduled and the BSR UL Grant is no longer sent to the UE.

In this embodiment, the network side device determines the maximum number of times of sending BSRs that are used for the UL Grant for BSR reporting and has not correctly received the response from the user terminal. When the number of BSR decoding failures or the BSR detection energy is not higher than a preset energy threshold When the number of times of the value reaches the maximum number of sending times, it is considered that an SR false alarm problem occurs. The maximum number of transmissions can be set to be greater than 1, so that the occurrence of SR false alarms can be determined through multiple confirmations, which ensures the reliability of the determination results, and thus ensures the consistency of the behavior of network-side devices and terminals in the case of DRX. The resource waste caused by the unlimited reservation of resources for the UE by the network side equipment in the existing network solution (pre-scheduling) is avoided.

An embodiment of the present invention further provides a network side device, as shown in FIG. 4 , including a processor 21 and a transceiver 22,

The processor 21 is configured to determine whether the number of times the BSR UL grant is sent to the user terminal and the BSR responded by the user terminal is not correctly received reaches the preset maximum number of sending times; if the BSR UL grant is sent to the user terminal and the user terminal is not correctly received. When the number of BSRs responded by the terminal reaches the maximum number of sending times, it is determined that an SR false alarm occurs.

In this embodiment, in order to avoid the SR false alarm problem in the case of DRX, it can be solved by limiting the number of times the network side device sends the BSR UL Grant. When the network-side device sends the UL Grant for BSR reporting to the UE and the BSR that is not correctly received by the user terminal reaches a preset maximum number of sending times, it is considered that an SR false alarm problem has occurred, and then the network-side device will not Continue to send the UL Grant for BSR reporting for the UE, thereby avoiding the waste of radio resources caused by SR false alarms and the inconsistency of the DRX state between the network side equipment and the UE.

Further, the transceiver 22 is configured to not send a BSR UL grant to the user terminal after determining that an SR false alarm occurs.

Further, the processor 21 is further configured to determine the maximum number of times of sending a BSR that sends a BSR UL grant and does not correctly receive a response from the user terminal.

Further, the maximum number of transmissions is equal to the maximum number of transmissions of the MSG3 message or the maximum number of HARQ transmissions.

Further, the processor 21 is specifically configured to set a counter, and the initial value of the counter is 0;

The transceiver 22 is specifically configured to receive the BSR in the current HARQ process;

The processor 21 is further configured to increase the value of the counter by 1 if the BSR decoding fails or the BSR detection energy is not higher than the preset energy threshold value; and determine whether the value of the counter reaches the maximum number of transmissions minus the number of times. 1. If the value of the counter reaches the maximum number of sending times minus 1, it is determined that the number of times that the BSR UL grant is sent to the user terminal and the BSR responded by the user terminal is not correctly received reaches the preset maximum number of sending times.

Further, the processor 21 is further configured to reset the value of the counter if the BSR decoding is successful or the BSR detection energy is higher than the preset energy threshold during the process of receiving the BSR by the transceiver. is 0.

An embodiment of the present invention further provides a network-side device, including a memory, a processor, and a computer program stored on the memory and running on the processor; the processor implements the above when executing the program The SR false alarm detection method described above.

Embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, implements the steps in the above-mentioned SR false alarm detection method.

Computer-readable media includes both persistent and non-permanent, removable and non-removable media, and storage of information may be implemented by any method or technology. Information may be computer readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read only memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), Flash Memory or other memory technology, Compact Disc Read Only Memory (CD-ROM), Digital Versatile Disc (DVD) or other optical storage, Magnetic tape cartridges, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission medium that can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, excludes transitory computer-readable media, such as modulated data signals and carrier waves.

The above are the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. It should be regarded as the protection scope of the present invention.

Claims (14)

1. a SR false alarm discovery method, applied to network side equipment, is characterized in that, comprises: The network side device determines whether the number of times that the BSR UL grant is sent to the user terminal and the BSR that the user terminal responds to is not correctly received reaches a preset maximum number of sending times; If the number of times of sending the BSR UL grant to the user terminal and not correctly receiving the BSR responded by the user terminal reaches the maximum number of sending times, the network side device determines that an SR false alarm occurs. 2. The SR false alarm discovery method according to claim 1, wherein after the network side device determines that an SR false alarm occurs, the method further comprises: The network side device no longer sends the BSR UL grant to the user terminal. 3. The SR false alarm discovery method according to claim 1, wherein the network side device determines whether the number of times the network side device sends a BSR UL grant to the user terminal and does not correctly receive the BSR that the user terminal responds to reaches a preset maximum. The number of times sent also includes: The network-side device determines the maximum number of times of sending a BSR that sends a BSR UL grant and does not correctly receive a response from the user terminal. 4. SR false alarm discovery method according to claim 3, is characterized in that, The maximum number of transmissions is equal to the maximum number of transmissions of the MSG3 message or the maximum number of HARQ transmissions. 5. The SR false alarm discovery method according to claim 3, wherein the network side device determines whether the number of times that the BSR UL grant is sent to the user terminal and the BSR that the user terminal responds to is not correctly received reaches a preset maximum. Send times include: The network side device sets a counter, and the initial value of the counter is 0; The network side device receives the BSR in the current HARQ process, and if the BSR decoding fails or the BSR detection energy is not higher than the preset energy threshold value, the network side device increases the value of the counter by 1; The network-side device determines whether the value of the counter reaches the maximum number of transmissions minus 1, and if the value of the counter reaches the maximum number of transmissions minus 1, the network-side device determines to send a BSR to the user terminal UL grant and the number of times of BSRs that are not correctly received by the user terminal response reaches the preset maximum number of sending times. 6. SR false alarm discovery method according to claim 5, is characterized in that, In the process of receiving the BSR by the network side device in the current HARQ process, if the BSR decoding is successful or the BSR detection energy is higher than the preset energy threshold value, the network side device resets the value of the counter to 0 . 7. A network side device, comprising a processor and a transceiver, The processor is used to determine whether the number of times of sending the BSR UL grant to the user terminal and not correctly receiving the BSR response from the user terminal reaches the preset maximum number of sending times; if the BSR UL grant is sent to the user terminal and the user terminal response is not correctly received. If the number of BSRs reaches the maximum number of sending times, it is determined that an SR false alarm occurs. 8. The network side device according to claim 7, wherein, The transceiver is configured to stop sending the BSR UL grant to the user terminal after it is determined that an SR false alarm occurs. 9. The network side device according to claim 7, wherein, The processor is further configured to determine the maximum number of times of sending a BSR that sends a BSR UL grant and does not correctly receive a response from the user terminal. 10. The network side device according to claim 9, wherein, The maximum number of transmissions is equal to the maximum number of transmissions of the MSG3 message or the maximum number of HARQ transmissions. 11. The network side device according to claim 9, wherein, The processor is specifically configured to set a counter, and the initial value of the counter is 0; The transceiver is specifically used to receive the BSR in the current HARQ process; The processor is further configured to increase the value of the counter by 1 if the BSR decoding fails or the BSR detection energy is not higher than the preset energy threshold value; determine whether the value of the counter reaches the maximum number of transmissions minus 1 , if the value of the counter reaches the maximum number of sending times minus 1, it is determined that the number of times that the BSR UL grant is sent to the user terminal and the BSR that the user terminal responds to is not correctly received reaches the preset maximum number of sending times. 12. The network side device according to claim 11, wherein, The processor is further configured to reset the value of the counter to 0 if the BSR decoding is successful or the BSR detection energy is higher than the preset energy threshold during the process of receiving the BSR by the transceiver. 13. A network side device, comprising a memory, a processor, and a computer program stored on the memory and running on the processor; characterized in that, when the processor executes the program, the program as claimed in the claims is implemented The SR false alarm detection method described in any one of 1-6. 14. A computer-readable storage medium on which a computer program is stored, characterized in that, when the program is executed by a processor, the steps in the SR false alarm detection method according to any one of claims 1-6 are implemented.