CN110012491B - SR false alarm discovery method and network side equipment - Google Patents
SR false alarm discovery method and network side equipment Download PDFInfo
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- CN110012491B CN110012491B CN201810009330.5A CN201810009330A CN110012491B CN 110012491 B CN110012491 B CN 110012491B CN 201810009330 A CN201810009330 A CN 201810009330A CN 110012491 B CN110012491 B CN 110012491B
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Abstract
The invention provides an SR false alarm discovery method and network side equipment, and belongs to the technical field of wireless. The SR false alarm discovery method is applied to network side equipment and comprises the following steps: the network side equipment judges whether the times of sending the BSR UL grant to the user terminal and incorrectly receiving the BSR response of the user terminal reach the preset maximum sending times or not; and if the number of times of sending the BSR UL grant to the user terminal and incorrectly receiving the BSR response of the user terminal reaches the maximum sending number, the network side equipment determines that SR false alarm occurs. The technical scheme of the invention can enable the network side equipment to find the SR false alarm problem, thereby avoiding the wireless resource waste problem caused by the SR false alarm.
Description
Technical Field
The present invention relates to the field of wireless technologies, and in particular, to a method for SR false alarm discovery and a network side device.
Background
The SR (Scheduling Request) false alarm problem is that a UE (User Equipment) does not send an SR but a base station mistakenly sends the SR, so the base station sends an uplink transmission Grant (UL Grant) to the UE, so that the UE sends a BSR (Buffer Status Report).
When the SR false alarm problem occurs when the UE configures Discontinuous reception (Discontinuous reception), the UE is likely to be in a dormant state when the base station sends a UL Grant (hereinafter referred to as BSR UL Grant) for sending a BSR to the UE through a PDCCH (Physical Downlink Control Channel), so the UE does not receive the PDCCH and does not send the BSR. And the base station receives data sent by the UE on the uplink resource indicated by the BSR UL Grant, and when the decoding fails, the base station sends the BSR UL Grant to the UE again to indicate retransmission operation.
In the existing network, if the base station does not receive the BSR of the UE after issuing the BSR UL Grant, the base station adopts pre-scheduling or compensatory scheduling to continuously schedule the UE. For SR false alarm problem, this not only causes waste of radio resources, but also may cause inconsistency between the base station and terminal DRX (Discontinuous Reception) status.
Disclosure of 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 an SR false alarm problem, thereby avoiding a radio resource waste problem caused by the SR false alarm.
In order to solve the above technical problem, embodiments of the present invention provide the following technical solutions:
On one hand, an SR false alarm discovery method is provided, which is applied to network side equipment and comprises the following steps:
the network side equipment judges whether the times of sending the BSR UL grant to the user terminal and incorrectly receiving the BSR response of the user terminal reach the preset maximum sending times or not;
and if the number of times of sending the BSR UL grant to the user terminal and incorrectly receiving the BSR response of the user terminal reaches the maximum sending number, the network side equipment determines that 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 does not send the BSR UL grant to the ue any more.
Further, before the network side device determining whether the number of times of sending the BSR UL grant to the ue and incorrectly receiving the BSR response from the ue reaches the preset maximum sending number, the method further includes:
and the network side equipment determines the maximum transmission times of the BSR which transmits the BSR UL grant and does not correctly receive the user terminal response.
Further, the maximum number of transmissions is equal to the maximum number of transmissions of the MSG3 message or the HARQ maximum number of transmissions.
Further, the determining, by the network-side device, whether the number of times of sending the BSR UL grant to the ue and incorrectly receiving the BSR response from the ue reaches a preset maximum number of times of sending includes:
The network side equipment sets a counter, and the initial value of the counter is 0;
the network side equipment receives BSR at the current HARQ process, and if BSR decoding fails or BSR detection energy is not higher than a preset energy threshold value, the network side equipment adds 1 to the value of the counter;
and the network side equipment judges whether the value of the counter reaches the maximum sending time minus 1, and if the value of the counter reaches the maximum sending time minus 1, the network side equipment judges that the times of sending the BSR UL grant to the user terminal and not correctly receiving the BSR responded by the user terminal reach the preset maximum sending time.
Further, in the process that the network side device receives the BSR at the current HARQ process, if the BSR decoding is successful or the BSR detection energy is higher than the preset energy threshold, the network side device resets the value of the counter to 0.
The embodiment of the invention also provides a network side device, which comprises a processor and a transceiver,
the processor is used for judging whether the times of sending the BSR UL grant to the user terminal and incorrectly receiving the BSR response of the user terminal reach the preset maximum sending times or not; and if the times of sending the BSR UL grant to the user terminal and not correctly receiving the BSR responded by the user terminal reach the maximum sending times, determining that SR false alarm occurs.
Further, the transceiver is configured to refrain from transmitting a BSR UL grant to the user terminal after determining that an SR false alarm has occurred.
Further, the processor is further configured to determine a maximum number of transmissions of a BSR that transmits a BSR UL grant and does not correctly receive a user terminal response.
Further, the maximum number of transmissions is equal to the maximum number of transmissions of the MSG3 message or the HARQ maximum number of transmissions.
Further, the processor is specifically configured to set a counter, where an initial value of the counter is 0;
the transceiver is specifically configured to receive a BSR at a current HARQ process;
the processor is further configured to add 1 to the counter if BSR decoding fails or BSR detection energy is not higher than a preset energy threshold; and judging whether the value of the counter reaches the maximum sending time minus 1, if the value of the counter reaches the maximum sending time minus 1, judging that the number of times of sending the BSR UL grant to the user terminal and incorrectly receiving the BSR responded by the user terminal reaches the preset maximum sending time.
Further, the processor is further configured to reset the counter to 0 if BSR decoding is successful or BSR detection energy is higher than the preset energy threshold value during the BSR receiving process by the transceiver.
The embodiment of the invention also provides network side equipment, which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor; the processor, when executing the program, implements the SR false alarm discovery method as described above.
Embodiments of the present invention also provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps in the SR false alarm discovery method described above.
The embodiment of the invention has the following beneficial effects:
in the above scheme, to avoid the SR false alarm problem under the DRX condition, the number of times that the network side device transmits the BSR UL Grant may be limited. When the network side equipment sends the UL Grant for BSR reporting to the UE and the BSR which does not correctly receive the user terminal response reaches a preset maximum sending frequency, the network side equipment considers that the SR false alarm problem occurs, and then the network side equipment cannot continuously send the UL Grant for BSR reporting to the UE, so that the problems of radio resource waste caused by the SR false alarm and inconsistent DRX states of the network side equipment and the UE are avoided.
Drawings
FIG. 1 is a diagram illustrating the prior art SR false alarm problem;
FIG. 2 is a flowchart illustrating an SR false alarm discovery method according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating the discovery of SR false alarm problems according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a network device according to an embodiment of the present invention.
Detailed Description
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 is made with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, in the current network, if the base station does not receive the BSR of the UE after issuing the BSR UL Grant, the base station may adopt pre-scheduling or compensatory scheduling to continuously schedule the UE. For SR false alarm problem, this not only causes radio resource waste, but also may cause base station and terminal DRX state inconsistency. Wherein, drx-inactivity timer specifies the number of consecutive PDCCH subframes that are continuously in an active state after the UE successfully decodes a PDCCH indicating the initially transmitted UL or DL user data. When TB decoding fails for a certain downlink HARQ process, the UE may assume retransmission only after HARQ RTT timer is at least a number of subframes, so when the HARQ RTT timer is running, the UE does not need to monitor the PDCCH. When the HARQ RTT timer expires and the data received by the corresponding HARQ process is not successfully decoded, the UE starts a drx-retransmission timer for the HARQ process. When the timer runs, the UE monitors 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, embodiments of the present invention provide an SR false alarm discovery method and a network device, which enable the network device to discover an SR false alarm problem, thereby avoiding a radio resource waste problem 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 device, and as shown in fig. 2, includes:
step 101: the network side equipment judges whether the times of transmitting the BSR UL grant to the user terminal and incorrectly receiving the BSR response of the user terminal reach the preset maximum transmitting times or not;
step 102: and if the times of sending the BSR UL grant to the user terminal and not correctly receiving the BSR response of the user terminal reach the maximum sending times, the network side equipment determines that SR false alarm occurs.
In this embodiment, to avoid the SR false alarm problem under the DRX condition, the number of times that the network side device sends the BSR UL Grant may be limited to solve the problem. When the network side equipment sends the UL Grant for BSR reporting to the UE and the BSR which does not correctly receive the user terminal response reaches a preset maximum sending frequency, the network side equipment considers that the SR false alarm problem occurs, and then the network side equipment cannot continuously send the UL Grant for BSR reporting to the UE, so that the problems of radio resource waste caused by the SR false alarm and inconsistent DRX states of the network side equipment and the UE are avoided.
Wherein, the BSRs which do not receive the ue response correctly include the BSRs which do not receive the ue response.
Even if the SR false alarm problem is not the case, when the number of UL Grant transmissions of the BSR reaches the preset maximum number of transmissions, the network side device does not need to let the UE retransmit 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 does not send the BSR UL grant to the ue any more.
Further, before the network side device determining whether the number of times of sending the BSR UL grant to the ue and incorrectly receiving the BSR response from the ue reaches the preset maximum sending number, the method further includes:
and the network side equipment determines the maximum transmission times of the BSR which transmits the BSR UL grant and does not correctly receive the user terminal response.
Further, the maximum number of transmissions is equal to the maximum number of transmissions of the MSG3 message or the HARQ maximum number of transmissions.
The MSG3 message is the third message of the interaction between the ue and the network side device during the random access process. The HARQ maximum transmission number is applied to an uplink HARQ process for an uplink packet except for the MSG3 message. The uplink HARQ process for MSG3 transmission is somewhat different from the normal HARQ process, so a maximum number of transmissions is designed for MSG3 message and non-MSG 3 uplink data in UL HARQ design.
Further, the determining, by the network-side device, whether the number of times of sending the BSR UL grant to the ue and incorrectly receiving the BSR response from the ue reaches a preset maximum number of times of sending includes:
the network side equipment sets a counter, and the initial value of the counter is 0;
the network side equipment receives BSR at the current HARQ process, and if BSR decoding fails or BSR detection energy is not higher than a preset energy threshold value, the network side equipment adds 1 to the value of the counter; the HARQ process represents an HARQ process, and the current HARQ process indicates the HARQ process used by the network side equipment for sending the BSR UL grant and the HARQ process used by the BSR;
and the network side equipment judges whether the value of the counter reaches the maximum sending time minus 1, and if the value of the counter reaches the maximum sending time minus 1, the network side equipment judges that the times of sending the BSR UL grant to the user terminal and not correctly receiving the BSR responded by the user terminal reach the preset maximum sending time.
Further, in the process that the network side device receives the BSR at the current HARQ process, if the BSR decoding is successful or the BSR detection energy is higher than the preset energy threshold, the network side device resets the value of the counter to 0.
The SR false alarm discovery method of the present invention is described in detail below with reference to the accompanying drawings and specific embodiments, where the SR false alarm discovery method of the present embodiment specifically includes the following steps:
step 1: the network side device determines the maximum transmission times maxBSRgrant-Tx of transmitting BSR UL Grant, and maintains a CURRENT _ TX _ BSRGrant state variable for each HARQ (Hybrid Automatic Repeat reQuest) process (process) transmitting BSR.
The initial value of the CURRENT _ TX _ BSRgrant counter is 0.
Step 2: the network side equipment receives the BSR at the CURRENT HARQ process, and adds 1 to a CURRENT _ TX _ BSRgrant counter if the BSR decoding fails or the BSR detection energy is not higher than a preset energy threshold value, wherein the preset energy threshold value can be set according to actual needs;
if CURRENT _ TX _ bsrggrant ═ maxbsrggrant-TX-1, the network side device will no longer send bsrggrant to the UE in the CURRENT HARQ process. At this time, the network side device considers that the SR false alarm problem occurs.
The CURRENT _ TX _ bsrggrant state variable is a continuous value, and once the network side device successfully decodes the BSR or the BSR detection energy is higher than the preset energy threshold value in the process of receiving the BSR by the CURRENT HARQ process, the CURRENT _ TX _ bsrggrant counter is reset to 0.
If UL HARQ is synchronous, maxBSRgrant-Tx should be consistent with maxHARQ-Msg3Tx (MSG3 message maximum transmission times)/maxHARQ-Tx (maximum retransmission times). The reason is that when the maximum retransmission number is reached, the UE will flush the buffer, and naturally the BSR will not be sent any more, and the network side device will not receive the BSR any more. Before the maximum retransmission times is reached, the network side device must issue the UL Grant to avoid the influence on the UL HARQ retransmission.
If UL HARQ is asynchronous, maxBSRgrant-Tx may be consistent with maxHARQ-Msg3Tx/maxHARQ-Tx, or may be other values.
In a specific example, UL HARQ is asynchronous, and maxbsrggrant-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. And when the continuous times that the BSR detection energy is not higher than the preset energy threshold value reach 2, the SR false alarm is considered to occur, so that the UE is not scheduled any more, and the BSR UL Grant is not sent to the UE any more.
In this embodiment, the network side device determines the maximum transmission frequency of the BSR used for the UL Grant reported by the BSR and not correctly receiving the user terminal response, and determines that an SR false alarm problem occurs when the BSR decoding failure frequency or the BSR detection energy is not higher than a preset energy threshold reaches the maximum transmission frequency. The maximum sending times can be set to be more than 1, so that the SR false alarm problem can be judged through multiple confirmation, the reliability of the judgment result is ensured, the consistency of the network side equipment and the terminal behavior under the DRX condition can be further ensured, and the resource waste caused by the fact that the network side equipment unrestrictedly reserves resources for the UE in the current 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 that a BSR UL grant is transmitted to the ue and a BSR response is not correctly received by the ue reaches a preset maximum transmission number; and if the times of sending the BSR UL grant to the user terminal and not correctly receiving the BSR responded by the user terminal reach the maximum sending times, determining that SR false alarm occurs.
In this embodiment, to avoid the SR false alarm problem under the DRX condition, the number of times that the network side device sends the BSR UL Grant may be limited to solve the problem. When the network side equipment sends the UL Grant for BSR reporting to the UE and the BSR which does not correctly receive the user terminal response reaches a preset maximum sending frequency, the network side equipment considers that the SR false alarm problem occurs, and then the network side equipment cannot continuously send the UL Grant for BSR reporting to the UE, so that the problems of radio resource waste caused by the SR false alarm and inconsistent DRX states of the network side equipment and the UE are avoided.
Further, the transceiver 22 is configured to refrain from transmitting a BSR UL grant to the user terminal after determining that the SR false alarm occurs.
Further, the processor 21 is further configured to determine a maximum transmission number of BSRs that transmit the BSR UL grant and do not correctly receive the user terminal response.
Further, the maximum number of transmissions is equal to a maximum number of transmissions or a HARQ maximum number of transmissions of the MSG3 message.
Further, the processor 21 is specifically configured to set a counter, where an initial value of the counter is 0;
the transceiver 22 is specifically configured to receive a BSR at a current HARQ process;
the processor 21 is further configured to add 1 to the counter value if BSR decoding fails or BSR detection energy is not higher than a preset energy threshold; and judging whether the value of the counter reaches the maximum sending times minus 1, if the value of the counter reaches the maximum sending times minus 1, judging that the times of sending the BSR UL grant to the user terminal and incorrectly receiving the BSR response of the user terminal reach the preset maximum sending times.
Further, the processor 21 is further configured to reset the counter to 0 if BSR decoding is successful or BSR detection energy is higher than the preset energy threshold during the BSR receiving process by the transceiver.
The embodiment of the invention also provides network side equipment, which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor; the processor, when executing the program, implements the SR false alarm discovery method as described above.
Embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps in the SR false alarm discovery method described above.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, 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 Discs (DVD) or other optical storage, magnetic cassettes, 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. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (14)
1. An SR false alarm discovery method is applied to network side equipment and is characterized by comprising the following steps:
the network side equipment judges whether the times of sending the BSR UL grant to the user terminal and incorrectly receiving the BSR response of the user terminal reach the preset maximum sending times or not;
if the number of times of sending the BSR UL grant to the user terminal and incorrectly receiving the BSR responded by the user terminal reaches the maximum sending number, the network side equipment determines that SR false alarm occurs;
the network side equipment determines the maximum transmission times maxBSRgrant-Tx of transmitting BSR UL Grant, and maintains a CURRENT _ TX _ BSRgrant state variable for each hybrid automatic repeat request HARQ process of transmitting BSR UL Grant; wherein, if UL HARQ is synchronous mode, maxBSRgrant-Tx needs to keep consistent with the maximum transmission times maxHARQ-Msg3 Tx/maximum retransmission times maxHARQ-Tx of MSG3 message; if UL HARQ is asynchronous, maxBSRgrant-Tx can be consistent with maxHARQ-Msg3 Tx/maxHARQ-Tx;
The network side equipment receives the BSR in the CURRENT HARQ process, and if the BSR decoding fails or the BSR detection energy is not higher than a preset energy threshold value, the network side equipment adds 1 to the CURRENT _ TX _ BSRgrant counter.
2. The SR false alarm discovery method of claim 1, wherein after the network side device determines that an SR false alarm has occurred, the method further comprises:
the network side device does not send the BSR UL grant to the ue any more.
3. The SR false alarm discovery method of claim 1, wherein before the network side device determining whether the number of times that the BSR UL grant is transmitted to the ue and the BSR response is not correctly received reaches the preset maximum number of transmissions, the method further comprises:
and the network side equipment determines the maximum transmission times of the BSR which transmits the BSR UL grant and does not correctly receive the user terminal response.
4. The SR false alarm discovery method of claim 3,
the maximum number of transmissions is equal to the maximum number of transmissions of the MSG3 message or the HARQ maximum number of transmissions.
5. The SR false alarm discovery method of claim 3, wherein said network side device determining whether the number of times that the BSR UL grant is transmitted to the UE and the BSR response is not correctly received by the UE reaches a preset maximum number of transmissions comprises:
The network side equipment sets a counter, and the initial value of the counter is 0;
the network side equipment receives BSR at the current HARQ process, and if BSR decoding fails or BSR detection energy is not higher than a preset energy threshold value, the network side equipment adds 1 to the value of the counter;
and the network side equipment judges whether the value of the counter reaches the maximum sending time minus 1, and if the value of the counter reaches the maximum sending time minus 1, the network side equipment judges that the times of sending the BSR UL grant to the user terminal and not correctly receiving the BSR response of the user terminal reach the preset maximum sending time.
6. The SR false alarm discovery method of claim 5,
and in the process that the network side equipment receives the BSR by the current HARQ process, if the BSR is decoded successfully or the BSR detection energy is higher than the preset energy threshold value, the network side equipment resets the value of the counter to 0.
7. A network side device, comprising a processor and a transceiver,
the processor is used for judging whether the times of sending the BSR UL grant to the user terminal and incorrectly receiving the BSR response of the user terminal reach the preset maximum sending times or not; if the number of times of sending the BSR UL grant to the user terminal and incorrectly receiving the BSR response of the user terminal reaches the maximum sending number, determining that SR false alarm occurs;
Determining the maximum transmission times maxBSRgrant-Tx of the UL Grant of the BSR, and maintaining a Current _ TX _ BSRgrant state variable for each hybrid automatic repeat request (HARQ) process for transmitting the BSR; wherein, if UL HARQ is a synchronous mode, maxBSRgrant-Tx needs to be consistent with the maximum transmission times maxHARQ-MSG3 Tx/maximum retransmission times maxHARQ-Tx of the MSG3 message; if UL HARQ is asynchronous, maxBSRgrant-Tx can be consistent with maxHARQ-Msg3 Tx/maxHARQ-Tx;
and receiving the BSR in the CURRENT HARQ process, and if the decoding of the BSR fails or the BSR detection energy is not higher than a preset energy threshold value, the network side equipment adds 1 to a Current _ TX _ BSRgrant counter.
8. The network-side device of claim 7,
the transceiver is configured to not send a BSR UL grant to the ue after determining that an SR false alarm occurs.
9. The network-side device of claim 7,
the processor is further configured to determine a maximum number of times of sending the BSR UL grant without correctly receiving a response from the ue.
10. The network-side device of claim 9,
the maximum number of transmissions is equal to the maximum number of transmissions of the MSG3 message or the HARQ maximum number of transmissions.
11. The network-side device of claim 9,
the processor is specifically configured to set a counter, where an initial value of the counter is 0;
the transceiver is specifically configured to receive a BSR at a current HARQ process;
the processor is further configured to add 1 to the counter if BSR decoding fails or BSR detection energy is not higher than a preset energy threshold; and judging whether the value of the counter reaches the maximum sending time minus 1, if the value of the counter reaches the maximum sending time minus 1, judging that the number of times of sending the BSR UL grant to the user terminal and incorrectly receiving the BSR responded by the user terminal reaches the preset maximum sending time.
12. The network-side device of claim 11,
the processor is further configured to reset the counter to 0 if BSR decoding is successful or BSR detection energy is higher than the preset energy threshold value during the BSR receiving process by the transceiver.
13. A network-side device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor; wherein the processor, when executing the program, implements the SR false alarm discovery method as recited in any one of claims 1-6.
14. A computer readable storage medium, having stored thereon a computer program, characterized in that the program, when being executed by a processor, carries out the steps of the SR false alarm discovery method according to any of the claims 1-6.
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| CN112713968A (en) * | 2021-03-29 | 2021-04-27 | 四川创智联恒科技有限公司 | Method for processing rollback in sleep period in DRX (discontinuous reception) |
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| WO2017045420A1 (en) * | 2015-09-15 | 2017-03-23 | 中兴通讯股份有限公司 | Base station and discontinuous reception processing method thereof |
| CN107370575A (en) * | 2016-05-13 | 2017-11-21 | 电信科学技术研究院 | A kind of dispatching method of autonomous retransmission, terminal and network side equipment |
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