Open-loop power control method based on multi-parameter fusion

Abstract

The invention provides an open-loop power control method based on multi-parameter fusion. The method comprises the following steps: judging whether a host of a repeater system comprises a slave; if not, judging that the repeater system can not acquire the RSRP value; if the RSRP value can be obtained, the uplink maximum transmitting power and the uplink gain of the repeater system are adjusted according to the difference value between the RSRP value and the nominal downlink output power; if the RSRP value cannot be obtained, the uplink maximum transmitting power and the uplink gain of the repeater system are adjusted according to the compression amount of the ALC value; and if yes, adjusting the uplink transmitting power of the slave through the calculated uplink expected receiving power of the host. According to the method, the uplink maximum transmitting power is dynamically adjusted by fusing the RSRP, the ALC, the dynamic threshold and the offset, and the problems of system interference and energy consumption caused by too high uplink power are solved.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technologies, and particularly to an open-loop power control method based on multi-parameter fusion. Background Art

[0002] In a wireless communication system, a repeater is a key device for expanding network coverage. The accuracy of its uplink power control directly affects system performance and energy efficiency. The repeater amplifies and forwards the signal received from the donor base station. If the uplink transmission power is set improperly, problems such as increased uplink interference, unbalanced load of the donor base station, or excessive power consumption of the repeater itself may occur. Traditional repeater power control methods mostly rely on static parameters or single indicators (such as a fixed path loss model or downlink signal strength), and it is difficult to adapt to complex and changeable wireless environments, especially with significant defects in dynamic channel conditions and burst interference scenarios. Therefore, it is very necessary to design an open-loop power control method based on multi-parameter fusion. Summary of the Invention

[0003] The purpose of the present invention is to provide an open-loop power control method based on multi-parameter fusion, which dynamically adjusts the maximum uplink transmission power by fusing RSRP, ALC, and dynamic thresholds and offsets to solve the system interference and energy consumption problems caused by excessive uplink power.

[0004] To achieve the above purpose, the present invention provides the following solution:

[0005] An open-loop power control method based on multi-parameter fusion, comprising the following steps:

[0006] Judge whether the host of the repeater system includes a slave;

[0007] If not, judge whether the repeater system can obtain the RSRP value;

[0008] If the RSRP value can be obtained, adjust the maximum uplink transmission power and uplink gain of the repeater system according to the difference between the RSRP value and the nominal downlink output power;

[0009] If the RSRP value cannot be obtained, adjust the maximum uplink transmission power and uplink gain of the repeater system according to the compression amount of the ALC value;

[0010] If so, adjust the uplink transmission power of the slave according to the calculated expected received power of the host uplink.

[0011] Optionally, the specific steps of adjusting the maximum uplink transmission power of the repeater system according to the difference between the RSRP value and the nominal downlink output power include:

[0012] Convert the RSRP value to the antenna port to obtain a converted value;

[0013] Calculate the theoretical downlink output power according to the conversion value;

[0014] Compare the difference between the theoretical downlink output power and the nominal downlink output power with a preset threshold;

[0015] If the difference exceeds the preset threshold, calculate the maximum uplink output power according to the difference;

[0016] Adjust the maximum uplink transmission power of the repeater system to the maximum uplink output power;

[0017] If the difference does not exceed the preset threshold, do not adjust the maximum uplink transmission power.

[0018] Optionally, the calculation formula for the theoretical downlink output power P RSRP is: P RSRP = RSRP + 10log 10 (BW / SCS); where, BSRP is the conversion value, BW is the signal bandwidth, and SCS is the subcarrier spacing.

[0019] Optionally, the calculation formula for the maximum uplink output power P UL-Max is: P UL-Max = max{P UL-Det-Min , min{P UL-Norminal , P UL-Norminal -(Δ - Δ Thr ) + Offset}; where, max{·} is the maximum value operation, min{·} is the minimum value operation, P UL-Det-Min is the minimum uplink detection power, P UL-Norminal is the nominal uplink output power, Offset is the preset offset, Δ is the difference, and Δ Thr is the preset threshold.

[0020] Optionally, the specific steps for adjusting the uplink gain of the repeater system according to the difference between the RSRP value and the nominal downlink output power include:

[0021] Judge whether the difference is greater than 0;

[0022] If so, calculate the uplink gain adjustment value according to the difference;

[0023] If not, do not adjust the uplink gain.

[0024] Optionally, the calculation formula for the uplink gain adjustment value G UL is: G UL = G UL-Norminal - Δ + O Gian ; where, G UL-Norminal is the nominal uplink gain, Δ is the difference, and O Gian is the preset gain adjustment offset.

[0025] Optionally, the specific steps for adjusting the maximum uplink transmission power of the repeater system according to the compression amount of the ALC value include:

[0026] Detect the compression amount of the ALC value of the repeater system;

[0027] Determine whether the compression amount is greater than a preset threshold;

[0028] If so, calculate the maximum uplink output power according to the compression amount;

[0029] Adjust the maximum uplink transmission power of the repeater system to the maximum uplink output power;

[0030] If not, do not adjust the maximum uplink transmission power.

[0031] Optionally, the specific steps for adjusting the uplink gain of the repeater system according to the compression amount of the ALC value include:

[0032] Determine whether the compression amount is greater than 0;

[0033] If so, calculate the uplink gain adjustment value according to the compression amount;

[0034] If not, do not adjust the uplink gain.

[0035] Optionally, the maximum uplink output power P UL-Max The calculation formula of is: P UL-Max = max{P UL-Det-Min , min{P UL-Norminal , P UL-Norminal -(Δ ALC -Δ Thr ) + Offset}; where, max{·} is the maximum value operation, min{·} is the minimum value operation, P UL-Det-Min is the minimum uplink detection power, P UL-Norminal is the nominal uplink output power, Offset is the preset offset, Δ ALC is the compression amount, Δ Thr is the preset threshold.

[0036] Optionally, the specific steps for adjusting the uplink transmission power of the slave according to the expected uplink received power of the master calculated include:

[0037] Take the difference between the real-time uplink transmission power of the master and the maximum value of the uplink gain of the master as the expected uplink received power of the master;

[0038] Broadcast the expected uplink received power of the master to the slave;

[0039] Take the difference between the expected received power of the host on the uplink and the path loss between the host and the slave as the uplink transmission power of the slave.

[0040] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects: The open-loop power control method based on multi-parameter fusion provided by the present invention includes: determining whether the host of the repeater system includes a slave; if not, determining whether the repeater system can obtain the RSRP value; if the RSRP value can be obtained, adjusting the maximum uplink transmission power and uplink gain of the repeater system according to the difference between the RSRP value and the nominal downlink output power; if the RSRP value cannot be obtained, adjusting the maximum uplink transmission power and uplink gain of the repeater system according to the compression amount of the ALC value; if so, adjusting the uplink transmission power of the slave through the calculated expected received power of the host on the uplink. This method dynamically adjusts the maximum uplink transmission power by fusing RSRP, ALC, and dynamic thresholds and offsets, and solves the problems of system interference and energy consumption caused by excessive uplink power. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0042] Figure 1 It is a flowchart of the open-loop power control method based on multi-parameter fusion of the present invention;

[0043] Figure 2 It is a flowchart of adjusting the maximum uplink transmission power according to the RSRP value of the present invention;

[0044] Figure 3 It is a flowchart of adjusting the maximum uplink transmission power according to the ALC compression amount of the present invention;

[0045] Figure 4 It is a flowchart of adjusting the uplink transmission power of the slave of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0047] To make the above objects, features, and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0048] As Figure 1 shown, the present invention provides a multi-parameter fusion-based open-loop power control method, including the following steps:

[0049] First, determine whether the host of the repeater station system includes a slave; if the host of the repeater station system does not include a slave, then determine whether the repeater station system can obtain the RSRP value; if the RSRP value can be obtained, then adjust the uplink maximum transmission power and uplink gain of the repeater station system according to the difference between the RSRP value and the nominal downlink output power;

[0050] Specifically, as Figure 2 shown, the specific steps of adjusting the uplink maximum transmission power of the repeater station system according to the difference between the RSRP value and the nominal downlink output power include:

[0051] Obtain the RSRP value, convert this RSRP value to the antenna port of the device to obtain a converted value;

[0052] Calculate the theoretical downlink output power P RSRP according to the converted value, and the calculation formula is:

[0053] P RSRP = PSRP + 10log 10 (BW / SCS);

[0054] wherein, RSRP is the converted value, BW is the signal bandwidth in kHz, and SCS is the subcarrier spacing in kHz.

[0055] Calculate the difference Δ between P RSRP and the nominal downlink output power of the device, and the calculation formula is:

[0056] Δ = P RSRP - P DL-Norminal ;

[0057] wherein, Δ is the difference, and P DL-Norminal is the nominal downlink output power of the device.

[0058] Judge whether the difference Δ is greater than the preset threshold Δ Thr ; if not, then do not adjust the uplink maximum transmission power; if so, then calculate the uplink maximum output power P UL-Max according to the difference, and the calculation formula is:

[0059] P UL-Max = max{P UL-Det-Min , min{P UL-Norminal , P UL-Norminal - (Δ - ΔThr ) + Offset}};

[0060] Among them, max{·} is the maximum value operation, min{·} is the minimum value operation, P UL-Det-Min is the minimum detected uplink power, P UL-Norminal is the nominal uplink output power, and Offset is a preset offset, which is set according to engineering experience. Then, the maximum uplink transmission power of the repeater system is adjusted to the maximum uplink output power.

[0061] Specifically, the specific steps for adjusting the uplink gain of the repeater system according to the difference between the RSRP value and the nominal downlink output power include:

[0062] Judge whether the difference is greater than 0; if not, do not adjust the uplink gain; if so, calculate the uplink gain adjustment value G UL , and the calculation formula is:

[0063] G UL = G UL-Norminal -Δ + O Gian ;

[0064] Among them, G UL-Norminal is the nominal uplink gain, and O Gian is a preset gain adjustment offset, which is set according to engineering experience.

[0065] If the RSRP value cannot be obtained, then adjust the maximum uplink transmission power and uplink gain of the repeater system according to the compression amount of the ALC value; as Figure 3 shown, the specific steps for adjusting the maximum uplink transmission power of the repeater system according to the compression amount of the ALC value include:

[0066] Detect the compression amount of the ALC value of the repeater system, and judge whether the compression amount is greater than the preset threshold; if not, do not adjust the maximum uplink transmission power; if so, calculate the maximum uplink output power according to the compression amount, and the calculation formula is:

[0067] P UL-Max = max{P UL-Det-Min , min{P UL-Norminal , P UL-Norminal -(Δ ALC -Δ Thr ) + Offset}};

[0068] Among them, max{·} is the maximum value operation, min{·} is the minimum value operation, P UL-Det-Min is the minimum detected uplink power, P UL-Norminal is the nominal uplink output power, Offset is a preset offset, which is set according to engineering experience, and Δ ALC is the compression amount, and ΔThr is a preset threshold. And adjust the maximum uplink transmission power of the repeater system to the maximum uplink output power P UL-Max .

[0069] Specifically, the specific steps of adjusting the uplink gain of the repeater system according to the compression amount of the ALC value include:

[0070] Determine whether the compression amount is greater than 0; if not, do not adjust the uplink gain; if so, calculate the uplink gain adjustment value G according to the compression amount UL , and the calculation formula is:

[0071] G UL =G UL-Norminal -Δ Alc +O Gian ;

[0072] wherein, G UL-Norminal is the nominal uplink gain of the device, Δ Alc is the compression amount, O Gian is the preset gain adjustment offset, which is set according to engineering experience.

[0073] If the host of the repeater system includes a slave, adjust the uplink transmission power of the slave by calculating the expected uplink received power of the host. As Figure 4 shown, calculate the expected uplink received power P Input-Max-Expect of the host, and the calculation formula is:

[0074] P Input-Max-Expect =P UL -G UL-Max ;

[0075] wherein, P UL is the real-time uplink transmission power of the host, and G UL-Max is the maximum value of the uplink gain of the host. Then broadcast the expected uplink received power of the host to the slave. The slave obtains the path loss L path between the host and the slave while receiving the expected uplink received power of the host, and calculate the uplink transmission power P S-UL of the slave according to the path loss. The calculation formula is: P S-UL =P Input-UL-Expect -L path .

[0076] The beneficial effects of the present invention are as follows:

[0077] 1) By dynamically limiting the maximum uplink transmission power, the inter-cell interference is effectively reduced, and the overall system capacity is improved;

[0078] 2) Avoid the energy consumption waste caused by power overflow, significantly reduce the device power consumption, and improve the energy efficiency;

[0079] 3) Adopt a dynamic threshold and multi-parameter fusion mechanism to flexibly adapt to the complex and changeable wireless channel environment, improving the accuracy and stability of power control.

[0080] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other.

[0081] Specific examples are used in the present invention to elaborate on the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation on the present invention.

Claims

1. An open-loop power control method based on multi-parameter fusion, characterized in that, It includes the following steps: Determine whether the host of the repeater system includes a slave; If not, then determine whether the repeater system can obtain the RSRP value; If the RSRP value can be obtained, adjust the maximum uplink transmit power and uplink gain of the repeater system according to the difference between the RSRP value and the nominal downlink output power; If the RSRP value cannot be obtained, adjust the maximum uplink transmit power and the uplink gain of the repeater system according to the compression amount of the ALC value; If so, adjust the uplink transmit power of the slave according to the calculated expected uplink received power of the host; 2. The open-loop power control method based on multi-parameter fusion according to claim 1, wherein The specific steps for adjusting the maximum uplink transmit power of the repeater system according to the difference between the RSRP value and the nominal downlink output power include: Convert the RSRP value to the antenna port to obtain a converted value; Calculate the theoretical downlink output power according to the converted value; Compare the difference between the theoretical downlink output power and the nominal downlink output power with a preset threshold; If the difference exceeds the preset threshold, calculate the maximum uplink output power according to the difference; Adjust the maximum uplink transmit power of the repeater system to the maximum uplink output power; If the difference does not exceed the preset threshold, do not adjust the maximum uplink transmit power.

3. The open-loop power control method based on multi-parameter fusion according to claim 2, characterized in that, The theoretical downlink output power P RSRP is calculated by the formula: P RSRP = RSRP + 10log 10 (BW / SCS); where RSRP is the conversion value, BW is the signal bandwidth, and SCS is the subcarrier spacing.

4. The open-loop power control method based on multi-parameter fusion according to claim 2, wherein The maximum uplink output power P UL-Max has the following calculation formula: P UL-Max = max{P UL-Det-Min , min{P UL-Norminal , P UL-Norminal -(Δ - Δ Thr ) + Offset}}; where max{·} is the maximum value operation, min{·} is the minimum value operation, P UL-Det-Min is the minimum uplink detection power, P UL-Norminal is the nominal uplink output power, Offset is the preset offset, Δ is the difference, and Δ Thr is the preset threshold.

5. The open-loop power control method based on multi-parameter fusion according to claim 2, characterized in that The specific steps for adjusting the uplink gain of the repeater system according to the difference between the RSRP value and the nominal downlink output power include: Determine whether the difference is greater than 0; If so, calculate the uplink gain adjustment value according to the difference; If not, do not adjust the uplink gain.

6. The open-loop power control method based on multi-parameter fusion according to claim 5, characterized in that The uplink gain adjustment value G UL is calculated by the formula: G UL = G UL-Norminal - Δ + O Gian ; where G UL-Norminal is the nominal uplink gain, Δ is the difference, and O Gian is the preset gain adjustment offset.

7. The open-loop power control method based on multi-parameter fusion according to claim 1, characterized in that, The specific steps for adjusting the maximum uplink transmit power of the repeater system according to the compression amount of the ALC value include: Detect the compression amount of the ALC value of the repeater system; Determine whether the compression amount is greater than a preset threshold; If so, calculate the maximum uplink output power according to the compression amount; Adjust the maximum uplink transmit power of the repeater system to the maximum uplink output power; If not, do not adjust the maximum uplink transmit power.

8. The open-loop power control method based on multi-parameter fusion according to claim 7, characterized in that The specific steps for adjusting the uplink gain of the repeater system according to the compression amount of the ALC value include: Determine whether the compression amount is greater than 0; If so, calculate the uplink gain adjustment value according to the compression amount; If not, do not adjust the uplink gain.

9. The open-loop power control method based on multi-parameter fusion according to claim 7, wherein, The maximum uplink output power P UL-Max is calculated by the formula: P UL-Max = max{P UL-Det-Min , min{P UL-Norminal , P UL-Norminal - (Δ ALC - Δ Thr ) + Offset}}; where max{·} is the maximum value operation, min{·} is the minimum value operation, P UL-Det-Min is the minimum uplink detection power, P UL-Norminal is the nominal uplink output power, Offset is the preset offset, Δ ALC is the compression amount, and Δ Thr is the preset threshold.

10. The open-loop power control method based on multi-parameter fusion according to claim 1, characterized in that The specific steps for adjusting the uplink transmit power of the slave according to the calculated expected uplink received power of the host include: Take the difference between the maximum value of the real-time uplink transmit power of the host and the uplink gain of the host as the expected uplink received power of the host; Broadcast the expected uplink received power of the host to the slave; Take the difference between the expected uplink received power of the host and the path loss between the host and the slave as the uplink transmit power of the slave.

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