Methods, systems, devices, and media for measuring downlink path loss

Abstract

This invention discloses a method, system, device, and medium for measuring downlink path loss, relating to the field of communication technology. It solves the technical problem of inaccurate downlink path loss measurement. The key technical point is that the UE can adaptively select to use the reference signal configured by the RRC module, the serving beam carried by the MIB, or the optimal SSB serving beam to measure downlink path loss. Uplink transmit power is calculated using downlink path loss, thereby improving the accuracy of uplink transmit power calculation. This allows the base station to correctly allocate RBs, increasing RB-level transmit power, improving demodulation accuracy, and increasing UE uplink throughput. Simultaneously, uplink power control optimization ensures that downlink feedback can be correctly demodulated by the base station, reducing downlink packet errors and increasing UE downlink throughput. More accurate uplink transmit power calculation also achieves UE power saving.

Description

Technical Field

[0001] This disclosure relates to the field of communication technology, and in particular to a method, system, device and medium for measuring downlink path loss. Background Technology

[0002] Uplink power control (hereinafter referred to as "uplink power control") refers to the technique of adjusting the transmit power of the UE (user side) uplink channel to transmit with the minimum power while ensuring the base station's receiving performance, thereby minimizing interference to the base station and meeting capacity and coverage requirements. The NR protocol 3GPP TS 38.123: "NR; Physical layer procedures for control" defines the formula for calculating uplink channel transmit power. Downlink path loss is a crucial parameter in calculating uplink transmit power; it refers to the energy loss of the signal transmitted from the base station to the UE during propagation. The 3GPP protocol stipulates that the UE calculates the downlink path loss used for uplink power control by measuring the RSRP (Reference Signal Receiving Power) of the reference signal configured by higher layers. However, existing methods for measuring downlink path loss do not allow the UE to adaptively select a suitable reference signal, leading to inaccurate measurements of specific beams in some scenarios, and the terminal's transmit power not conforming to signal quality requirements. Summary of the Invention

[0003] This disclosure provides a method, system, device, and medium for measuring downlink path loss. The technical objective is that the UE can adaptively select the serving beam to measure downlink path loss, making the measurement of downlink path loss more accurate, thereby making the terminal's transmit power more consistent with channel quality.

[0004] The above-mentioned technical objective of this disclosure is achieved through the following technical solution:

[0005] A method for measuring downlink path loss includes:

[0006] Configure at least one narrow-beam SSB service beam;

[0007] The UE receives an instruction to acquire the first SSB serving beam and uses the first SSB serving beam to calculate the downlink path loss.

[0008] Furthermore, including:

[0009] Configure reference signal;

[0010] The UE reports the reference signal received power based on the SSB serving beam measurement. RSRP ,

[0011] The UE identifies the scenario and selects the appropriate serving beam to calculate downlink path loss.

[0012] Furthermore, when the reference signal is a narrow beam, if the UE receives an indication and obtains the first SSB service beam, the downlink path loss is calculated using the first SSB service beam; if the UE does not receive an indication, the downlink path loss is calculated using the service beam carried by the MIB.

[0013] Furthermore, when the reference signal is a wide beam, if the UE receives an indication and obtains the first SSB service beam, the downlink path loss is calculated using the first SSB service beam; if the UE does not receive an indication, the downlink path loss is calculated using the reference signal.

[0014] A system for measuring downlink path loss, comprising:

[0015] The RRC module includes a first configuration unit, which configures at least one set of narrow beam SSB service beams.

[0016] The UE includes a receiving unit and a computing unit. The receiving unit receives an instruction to acquire a first SSB serving beam, and the computing unit uses the first SSB serving beam to calculate downlink path loss.

[0017] Furthermore, the RRC module also includes a second configuration unit, which configures the reference signal;

[0018] The UE further includes a transmission unit and a selection unit. The transmission unit reports the reference signal received power based on the SSB serving beam measurement, and the selection unit identifies the scenario and selects the corresponding serving beam for calculating downlink path loss.

[0019] Further, the second configuration unit includes:

[0020] Narrow beam configuration unit, for configuring narrow beam reference signals;

[0021] Wide beam configuration unit, configures wide beam reference signal.

[0022] Furthermore, the selection unit includes:

[0023] The first selection unit selects the first SSB service beam when the UE receives an instruction and obtains the first SSB service beam.

[0024] The second selection unit selects the serving beam carried by the MIB when the reference signal is a narrow beam and the UE does not receive an indication.

[0025] The third selection unit selects the reference signal when the reference signal is a wide beam and the UE does not receive an indication.

[0026] A computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the program, implements the method for measuring downlink path loss as described in any of the preceding claims.

[0027] A computer medium storing a computer program that, when executed by a processor, implements the method for measuring downlink path loss as described in any of the preceding claims.

[0028] The beneficial effects of this disclosure are as follows: The method, system, device, and medium for measuring downlink path loss described herein allow the UE to adaptively select (1) to measure downlink path loss using the reference signal configured by the RRC module; (2) to measure downlink path loss using the serving beam carried by the MIB; and (3) to measure downlink path loss using the optimal SSB serving beam (i.e., the first SSB serving beam). By calculating uplink transmit power through downlink path loss, the accuracy of uplink transmit power calculation is improved, enabling the base station to correctly allocate RBs (Resource Blocks), increasing RB-level transmit power, improving demodulation accuracy, and increasing UE uplink traffic.

[0029] Meanwhile, uplink power control optimization can ensure that downlink feedback can be correctly demodulated by the base station, reduce the number of downlink error packets, and improve UE downlink traffic; more accurate calculation of uplink transmit power can also achieve the purpose of UE power saving; reducing interference to other UEs in the cell can improve the overall traffic of the cell; and reducing interference to neighboring cells can improve the traffic of users at the edge of neighboring cells. Attached Figure Description

[0030] Figure 1 This is a flowchart of the method disclosed herein;

[0031] Figure 2 This is a schematic diagram of the system disclosed herein;

[0032] Figure 3 This is a flowchart of Example 1;

[0033] Figure 4 This is a flowchart of Example 2;

[0034] Figure 5 This is a flowchart of Example 3. Detailed Implementation

[0035] The technical solution of this disclosure will now be described in detail with reference to the accompanying drawings. In the description of this disclosure, it should be understood that the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features; they are only used to distinguish different components. Furthermore, the "first SSB serving beam" is the serving beam with superior performance selected by the UE after receiving instructions from the base station, which is superior to other serving beams. Here, performance mainly refers to the fact that the selected "first SSB serving beam" yields the most accurate result among all results when used to calculate downlink path loss.

[0036] Figure 1 The flowchart of the method disclosed herein is as follows: Figure 1 As shown, at least one narrow beam SSB service beam is first configured, and then the UE receives an instruction to obtain the first SSB service beam and uses the first SSB service beam to calculate the downlink path loss.

[0037] Generally, a narrow beam SSB service beam includes at least one SSB service beam, and the first SSB service beam is the optimal SSB service beam among all SSB service beams.

[0038] Additionally, if the RRC module is not configured with a reference signal for uplink power control to measure downlink path loss, the SSB (Synchronization Signal and PBCH block) serving beam configured in the MIB (Master Information Block) will be used. After configuring multiple narrow-beam SSB (Synchronization Signal Block) serving beams based on the RRC (Radio Resource Control) module, the UE measures the RSRP of all beams and reports it to the base station. The base station then instructs the UE on the optimal SSB serving beam via MACCE (Mac Control Element) data packets.

[0039] Figure 3 The flowchart of an embodiment of this disclosure is as follows: a reference signal and at least one set of narrow beam SSB serving beams are configured. The UE reports the reference signal received power (i.e., RSRP) measured based on the configured SSB serving beams. Then, the UE identifies the scenario and selects the corresponding serving beam to calculate the downlink path loss.

[0040] Generally, the reference signal is the same as the reference signal used for measuring downlink path loss in uplink power control.

[0041] Figure 4The flowchart of Embodiment 2 of this disclosure shows that when the configured reference signal is a narrow beam, it is checked whether the UE has received an instruction. If the UE has received an instruction, the first SSB service beam is obtained and the downlink path loss is calculated using the first SSB service beam. If the UE has not received an instruction, the downlink path loss is calculated using the service beam carried by the MIB.

[0042] Because narrow beams have a small coverage area, if the UE is outside the main lobe of the beam, the calculated uplink power will be too high. Under the influence of power control, the uplink power will continuously increase, thereby raising the noise floor. This is a negative impact on the UE's uplink traffic and increases interference to other UEs, resulting in a decrease in overall cell traffic. After the UE receives an instruction from the base station to switch to the optimal first SSB serving beam, the correct channel quality can be measured. Both UE traffic and cell traffic increase, which can also achieve the goal of saving UE power.

[0043] When the UE does not receive an instruction from the base station, it switches to the serving beam carried by the MIB. Since the serving beam carried by the MIB is a wide beam, it can cover the entire cell. Compared with the fixed narrow beam configured by the RRC module, the serving beam carried by the MIB can measure the correct channel quality, which increases both UE traffic and cell-level traffic, and can also achieve the purpose of saving UE power.

[0044] Figure 5 The flowchart of Embodiment 3 of this disclosure shows that when the configured reference signal is a wide beam, it is checked whether the UE has received an instruction. If the UE has received an instruction, the first SSB service beam is obtained and the downlink path loss is calculated using the first SSB service beam. If the UE has not received an instruction, the downlink path loss is calculated directly using the reference signal.

[0045] Because the wide beam coverage area is small, the signal is weak and the interference is strong for users at the cell edge, and the path loss measurement is inaccurate. After the UE receives the base station's instruction to switch to the optimal first SSB service beam, the downlink signal has a shaping gain, and the UE can measure the downlink path loss accurately. Both UE traffic and cell-level traffic are increased.

[0046] Figure 2 This is a schematic diagram of the system disclosed herein, such as Figure 2As shown, the system for measuring downlink path loss includes an RRC module and a UE. The RRC module includes a first configuration unit and a second configuration unit. The UE includes a receiving unit, a calculation unit, a transmitting unit, and a selection unit, wherein the selection unit further includes a first selection unit, a second selection unit, and a third selection unit. The UE's receiving unit receives instructions from the base station, and the selection unit selects the signal used to calculate the downlink path loss based on the instructions received by the receiving unit. The RRC module is configured with a wide beam or a narrow beam. The base station uses beamforming technology to periodically transmit the downlink reference signal in a narrow beam. The UE detects the downlink reference signal at the corresponding time to obtain the RSRP. The functions of each module in the above system are the same as those in the above method and embodiments, and will not be repeated here.

[0047] The above are exemplary embodiments of this disclosure, and the scope of protection of this disclosure is defined by the claims and their equivalents.

Claims

1. A method of measuring downlink path loss, the method comprising: The system comprises: an RRC module configured with a reference signal and at least one set of narrow-beam SSB serving beams; a base station indicating a first SSB serving beam via a media access control (MAC) control element (CE) data packet, the first SSB serving beam being the best SSB serving beam in the at least one set of SSB serving beams; a UE receiving an instruction from the base station to acquire the first SSB serving beam and calculate downlink loss using the first SSB serving beam; if the UE does not receive the instruction and the reference signal is a narrow beam, calculating downlink loss using a serving beam carried in a master information block (MIB); if the UE does not receive the instruction and the reference signal is a wide beam, calculating downlink loss using the reference signal. 2.The method of measuring downlink path loss according to claim 1, wherein, The system comprises: a UE reporting reference signal received power (RSRP) measured based on the SSB serving beam, the UE identifying a scenario and selecting a corresponding serving beam for calculating downlink loss.

3. A system for measuring downlink path loss, characterized by, The system comprises: an RRC module comprising a first configuration unit configured with at least one set of narrow-beam SSB serving beams; the RRC module further comprising a second configuration unit configured with a reference signal; a base station indicating a first SSB serving beam via a media access control (MAC) control element (CE) data packet, the first SSB serving beam being the best SSB serving beam in the at least one set of SSB serving beams; a UE comprising a receiving unit, a calculating unit, and a selecting unit, the receiving unit receiving an instruction from the base station to acquire the first SSB serving beam, and the calculating unit calculating downlink loss using the first SSB serving beam; the selecting unit comprising: a first selecting unit selecting the first SSB serving beam when the UE receives the instruction from the base station and acquires the first SSB serving beam; a second selecting unit selecting a serving beam carried in a master information block (MIB) when the reference signal is a narrow beam and the UE does not receive the instruction; a third selecting unit selecting the reference signal when the reference signal is a wide beam and the UE does not receive the instruction.

4. The system for measuring downlink loss according to claim 3, wherein the UE further comprises a sending unit reporting reference signal received power (RSRP) measured based on the SSB serving beam, and the selecting unit identifying a scenario and selecting a corresponding serving beam for calculating downlink loss.

5. The system for measuring downlink path loss as claimed in claim 4, wherein, the second configuration unit comprising: a narrow-beam configuration unit configured with a narrow-beam reference signal; a wide-beam configuration unit configured with a wide-beam reference signal.

6. A computer device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, The processor implements the method for measuring downlink loss according to claim 1 or 2 when executing the program.

7. A computer medium, characterized by The computer medium stores the computer program, and the processor implements the method for measuring downlink loss according to claim 1 or 2 when executing the program.

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