CN101222249B - Closed-loop power controller and its control method - Google Patents

Abstract

The invention discloses a closed loop power control device and a method thereof, wherein the device comprises a demodulation decoding module, an object signal to jamming ratio allocation module and a power control module, wherein the demodulation decoding module is used to complete descrambling and despreading of DPCCH, E-DPCCH and E-DPDCH to obtain signal to jamming ratio, and to complete row decoding of E-DPCCH and E-DPDCH to obtain the channel quality information of the E-DPCCH and E-DPDCH; the object signal to jamming ratio allocation module is used to allocate object signal to jamming ratio according to signal to jamming ratio and channel quality; moreover, the power control module is used to control the closed loop power of subscriber equipment according to the allocated object signal to jamming ratio.

Description

Closed-loop power control device and its control method

technical field

The present invention relates to the communication field, in particular to a closed-loop power control device and its control method, and a target signal-to-interference ratio configuration device and method.

Background technique

The third generation (3G) wireless mobile communication is in constant evolution and changes, constantly introducing new requirements to achieve low cost and high performance, in the fifth edition (R5, Release 5) and sixth edition (R6, Release 6) ) respectively introduced High Speed Downlink Access (HSDPA for short) and High Speed Uplink Packet Access (HSUPA for short), the purpose of which is to make full use of limited wireless resources to improve the throughput rate and Single-user equipment (User Equipment, referred to as UE) peak rate, faster response to UE requests, reduced delay, according to the development direction of 3G wireless mobile, uplink Enhanced Dedicated Transport Channel (Enhanced Dedicated Transport Channel, referred to as E-DCH) The possibility of replacing a dedicated transport channel (Dedicated Transport Channel, DCH for short) is increasing.

The signal-to-interference ratio target value (SIR Target) in the current protocol is controlled by the Radio Network Controller (RNC for short), and the RNC adjusts the SIR Target according to the current channel quality, and the base station (Node B) The power control processing part performs closed-loop power control on the transmit power of the UE according to the SIR Target configured by the RNC. The basis for the RNC to control the SIR Target is the bit error rate (Bit Error Rate, BER for short) of the physical channel dedicated transmission channel, the BER of the DCH, the block error rate (Block Error Rate, BLER for short) of the DCH, and the SIR error ( SIR Error), E-DCH hybrid automatic repeat request failure frame protocol (Hybrid Automatic Repeat Request Failure Frame Protocol, referred to as HARQ Failure FP) frame, the number of retransmissions in the E-DCH FP frame and other parameters.

For a UE configured with a dedicated downlink transport channel (Dedicated Physical DataChannel, referred to as DPDCH), since it may be in a soft handover state, the RNC can comprehensively consider all soft handover Node Bs to realize the control of the SIR Target. When no DPDCH is configured, RNC can refer to the number of retransmissions or HARQ Failure in the FP frame of E-DCH for control; since the FP frame of E-DCH is reported separately for each MAC-dFlow, the RNC cannot timely determine the retransmission of MAC-d Flow relationship, and the rate of uplink service data to be performed by the subsequent scheduling authorization of the UE, so the control of the SIR Target is relatively complicated and lacks predictability.

Contents of the invention

The object of the present invention is to provide a power control device and method and a target signal-to-interference ratio configuration device and method, so as to improve the accuracy of target signal-to-interference ratio control and increase the response speed of user equipment.

According to one aspect of the present invention, a closed-loop power control device is provided, including: a demodulation and decoding module for descrambling and despreading DPCCH, E-DPCCH and E-DPDCH to obtain a signal-to-interference ratio, and E- Decoding DPCCH and E-DPDCH to obtain channel quality information of E-DPCCH and E-DPDCH; a target signal-to-interference ratio configuration module, configured to configure a target signal-to-interference ratio according to the signal-to-interference ratio and channel quality information; and a power control module, It is used to control the closed-loop power of the user equipment according to the configured target signal-to-interference ratio.

The closed-loop power control device is located in the base station to which the user equipment belongs.

The demodulation and decoding module includes: a demodulation module for descrambling and despreading DPCCH, E-DPCCH, and E-DPDCH to obtain a signal-to-interference ratio; and a decoding module for E-DPCCH and E-DPDCH Decoding is performed to obtain channel quality information of E-DPCCH and E-DPDCH. Wherein, the decoding module includes: an E-DPCCH decoding module, which is used to decode the E-DPCCH to obtain the channel quality information E-TFCI of the E-DPCCH; and an E-DPDCH decoding module, which is used to decode the E-DPCCH The DPDCH is decoded, and ACK or NACK is output according to whether the decoding is correct, as the channel quality information of the E-DPDCH.

The target signal-to-interference ratio configuration module includes: a high-speed uplink packet access service scheduling module for scheduling high-speed uplink packet access services to obtain the SG of the user equipment; a target signal-to-interference ratio comparison module for comparing the target signal-to-interference ratio with the signal comparing the result of the comparison of the interference ratio with a first threshold, comparing the number of NACKs with a second threshold, comparing the number of ACKs with a third threshold, and/or comparing SG with LUPR; and the target signal The interference ratio control module is used to increase or decrease the target signal-to-interference ratio according to the comparison results of multiple comparisons performed in the target signal-to-interference ratio comparison module.

According to one aspect of the present invention, a closed-loop power control method is provided, including the following steps: S502, performing descrambling and despreading on DPCCH, E-DPCCH and E-DPDCH to obtain a signal-to-interference ratio, and performing E-DPCCH and E-DPDCH DPDCH is decoded to obtain channel quality information of E-DPCCH and E-DPDCH; S504, configure the target signal-to-interference ratio according to the signal-to-interference ratio and channel quality information; and S506, control the closed-loop of the user equipment according to the configured target signal-to-interference ratio power.

The closed-loop power control method is used in the base station to which the user equipment belongs.

Step S502 includes: S5022, descrambling and despreading DPCCH, E-DPCCH, and E-DPDCH to obtain a signal-to-interference ratio; and S5024, decoding E-DPCCH and E-DPDCH, to obtain E-DPCCH, And the channel quality information of E-DPDCH. Wherein, step S5024 includes: S5024-2, decoding the E-DPCCH to obtain the channel quality information E-TFCI of the E-DPCCH; and S5024-4, decoding the E-DPDCH, and according to whether the decoding is correct And output ACK or NACK as channel quality information of E-DPDCH.

Step S504 includes: S5042, scheduling the high-speed uplink packet access service to obtain the SG of the user equipment; S5044, judging whether the E-TFCI is successfully obtained in step S5024-2, or judging the comparison between the target signal-to-interference ratio and the signal-to-interference ratio Whether the result is greater than the first threshold; S5046, if the E-TFCI is successfully obtained, or the comparison result of the target signal-to-interference ratio and the signal-to-interference ratio is greater than the first threshold, then compare the number of NACKs with the second threshold, otherwise The target signal-to-interference ratio is increased by the first decibel value; S5048, if the number of NACKs is not greater than the second threshold value, then the number of ACKs is compared with the third threshold value, otherwise the target signal-to-interference ratio is increased by the second decibel value; S5050, if The number of ACKs is less than the third threshold, then compare the comparison result of SG and LUPR with the fourth threshold, otherwise the target signal-to-interference ratio is reduced by the third decibel value; and S5052, if the comparison result of SG and LUPR is greater than the fourth threshold value, increase the target signal-to-interference ratio by a fourth decibel value, otherwise go to step S506.

The present invention can control the target signal-to-interference ratio through the base station, thereby increasing the control speed of the channel quality of the UE, controlling the target signal-to-interference ratio more accurately, reducing unnecessary uplink interference, and making full use of uplink wireless resource.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

1A to 1C are block diagrams illustrating a closed-loop power control device and its components according to the present invention;

Fig. 2 is a block diagram showing the relationship between modules of the closed-loop power control device when the closed-loop power control device according to the present invention is used in a base station;

Fig. 3 is a flowchart showing the process of the demodulation/decoding module obtaining some and/or all parameters included in the channel quality information;

Fig. 4 is the flow chart showing the process of HSUPA scheduling module adjusting SIR Target; And

5A to 5C are flow charts showing the flow of the power control method and the specific flow of steps thereof according to the present invention.

Detailed ways

Embodiments of the present invention will be described in detail below with reference to the drawings.

Referring to FIGS. 1A to 1C , a closed-loop power control device according to the present invention is illustrated. As shown in the figure, the power control device according to the present invention includes: a demodulation and decoding module 102, which is used to perform descrambling and despreading on DPCCH, E-DPCCH and E-DPDCH to obtain the signal-to-interference ratio, and E-DPDCH is decoded to obtain the channel quality information of E-DPCCH and E-DPDCH; The target signal to interference ratio configuration module 104 is used to configure the target signal to interference ratio according to the signal to interference ratio and the channel quality information; and the power control module 106, It is used to control the closed-loop power of the user equipment according to the configured target signal-to-interference ratio.

Wherein, the demodulation and decoding module 102 includes: a demodulation module 1022, which is used to descramble and despread DPCCH, E-DPCCH, and E-DPDCH to obtain a signal-to-interference ratio; and a decoding module 1024, which is used to perform E-DPDCH DPCCH and E-DPDCH are decoded to obtain channel quality information of E-DPCCH and E-DPDCH.

Wherein, the decoding module 1024 includes: an E-DPCCH decoding module 1024-2, which is used to decode the E-DPCCH to obtain the channel quality information E-TFCI of the E-DPCCH; and an E-DPDCH decoding module 1024- 4. It is used to decode the E-DPDCH, and output ACK or NACK according to whether the decoding is correct, as the channel quality information of the E-DPDCH.

Among them, the target signal-to-interference ratio configuration module 104 includes: a high-speed uplink packet access service scheduling module 1042, which is used to schedule a high-speed uplink packet access service to obtain the SG of the user equipment; a target signal-to-interference ratio comparison module 1044, which is used to set the target SIR and SIR comparison results are compared with a first threshold, the number of NACKs is compared with a second threshold, the number of ACKs is compared with a third threshold, and/or SG is compared with LUPR comparison; and a target signal-to-interference ratio control module 1046, configured to increase or decrease the target signal-to-interference ratio according to the comparison results of multiple comparisons performed in the target signal-to-interference ratio comparison module.

The above-mentioned closed-loop power control device according to the present invention can be applied to the case where the user equipment is not configured with DPDCH, and can be implemented in the base station serving the user equipment.

In the case where DPDCH is not configured, the base station controls the target signal-to-interference ratio according to the current channel quality, GBR of the user equipment, non-scheduled data rate requirements, and the rate of scheduled data, wherein the base station is used to realize the above functions The relationship between each module is shown in Figure 2.

It can be seen from Figure 2 that the demodulation/decoding module sends the demodulated data information and channel quality information to the HSUPA scheduling module; the HSUPA scheduling module receives the channel quality, decoding results, etc., and sends the target information to the power control module Signal-to-interference ratio; the power control module performs closed-loop power control on the corresponding UE according to the SIR Taget configured by the HSUPA scheduling module.

Among them, the operation of the demodulation/decoding module is shown in Figure 3:

S302, Dedicated Physical Control Channel (Dedicated Physical Control Channel, DPCCH for short), Enhanced Dedicated Physical Control Channel (Enhanced Dedicated Physical Control Channel, E-DPCCH for short), Enhanced Dedicated Physical Data Channel (Enhanced Dedicated Physical Data Channel, E-DPDCH for short) Perform descrambling and despreading, and calculate the SIR.

S304, perform channel decoding on the DPCCH, calculate the Pilot BitError Rate (Pilot BER for short); decode the E-DPCCH channel, and perform E-DCH Transport Format Combination Indicator (E-DCH Transport Format CombinationIndicator, E-TFCI for short) is decoded to obtain E-TFCI.

S306, judging whether the E-TFCI is valid, if valid, go to S308; if not, go to S314.

S308, perform channel decoding on the E-DPDCH, and determine the number of HARQ retransmissions (Number of HARQRetransmissions, NHR for short) according to the current frame number and time slot number and the retransmission sequence number (Retransmission Sequence Number, RSN) of the E-DPCCH channel decoding , according to whether the decoding is correct to determine the acknowledgment/negative acknowledgment (Acknowledgment/Negative Acknowledgment, ACK/NACK for short).

S310, judging whether the decoding is successful, if the decoding is successful, proceed to S312, and if the decoding fails, proceed to S314.

S312. Determine a hybrid automatic repeat request power offset (Hybrid Automatic Repeat Request Power Offset, HARQ PO for short) according to the data content.

S314. Send some or all information of SIR, Pilot BER, E-TFCI, ACK/NACK, retransmission number (Retransmission Number, RN for short), and HARQ PO to the HSUPA scheduling module.

Among them, the HSUPA scheduling module determines the SIR Target according to the current channel quality, rate requirements, and expected scheduled data rate of the user equipment, and then sends the SIR Target to the power control module of Node B. The specific process is shown in Figure 4:

S402, saving some or all information of SIR, Pilot BER, E-TFCI, ACK/NACK, NHR, and HARQ PO.

S404, start HSUPA scheduling, and calculate the SG of the UE.

S406, judging whether the E-TFCI decoding is successful or whether SIR Target-SIR<SIRT, if the decoding is successful or SIR Target-SIR>=SIRT (SIR threshold, SIR Threshold), then proceed to S410, otherwise proceed to S408.

S408, increase the SIR Target M1dB, and end the process.

S410, judging whether the number of consecutive NACKs is greater than L, if the number of consecutive NACKs<=L, go to S414, otherwise go to S412.

S412, increase the SIR Target M2dB, and end the process.

S414, judging whether the continuous ACK is greater than or equal to X, if the continuous ACK<X, go to S418, otherwise go to S416.

S416, reduce SIR Target M3dB.

S418, judging whether SG-LUPR is greater than Q, if SG-LUPR<=Q, then end the process, otherwise go to S420.

S420, increase SIR Target M4dB, end the process.

It should be noted here that L, X, M1, M2, M3, and M4 can be set according to specific algorithms.

Wherein, the above-mentioned judging process shown in Figure 4 can be completed by the following methods:

In summary, as shown in FIG. 5A to FIG. 5C , the closed-loop power control method of the closed-loop power control device according to the present invention includes the following steps: S502, descrambling and despreading the DPCCH, E-DPCCH and E-DPDCH to Obtain the signal-to-interference ratio, and decode the E-DPCCH and E-DPDCH to obtain the channel quality information of the E-DPCCH and E-DPDCH; S504, configure the target signal-to-interference ratio according to the signal-to-interference ratio and channel quality information; and S506, The closed-loop power of the user equipment is controlled according to the configured target signal-to-interference ratio.

Wherein, S502 includes: S5022, perform descrambling and despreading on DPCCH, E-DPCCH, and E-DPDCH to obtain the signal-to-interference ratio; and S5024, decode E-DPCCH, and E-DPDCH, to obtain E-DPCCH , and channel quality information of the E-DPDCH.

Wherein, step S5024 includes: S5024-2, decoding the E-DPCCH to obtain the channel quality information E-TFCI of the E-DPCCH; and S5024-4, decoding the E-DPDCH, and according to whether the decoding is correct And output ACK or NACK as channel quality information of E-DPDCH.

Wherein, step S504 includes: S5042, scheduling the high-speed uplink packet access service to obtain the SG of the user equipment; S5044, judging whether the E-TFCI is successfully obtained in step S5024-2, or judging the target signal-to-interference ratio and signal-to-interference ratio Whether the comparison result is greater than the first threshold; S5046, if the E-TFCI is successfully obtained, or the comparison result of the target signal-to-interference ratio and the signal-to-interference ratio is greater than the first threshold, then compare the number of NACKs with the second threshold, Otherwise, increase the target signal-to-interference ratio by the first decibel value; S5048, if the number of NACKs is not greater than the second threshold value, compare the number of ACKs with the third threshold value, otherwise increase the target signal-to-interference ratio by the second decibel value; S5050 , if the number of ACKs is less than the third threshold, compare the comparison result of SG and LUPR with the fourth threshold, otherwise reduce the target signal-to-interference ratio by the third decibel value; and S5052, if the comparison result of SG and LUPR is greater than the first If there are four thresholds, increase the target signal-to-interference ratio by the fourth decibel value, otherwise go to step S506.

The present invention can control the target signal-to-interference ratio through the base station, thereby increasing the control speed of the channel quality of the UE, controlling the target signal-to-interference ratio more accurately, reducing unnecessary uplink interference, and making full use of uplink wireless resource.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (16)

1. a closed-loop power control device is characterized in that, said closed-loop power control device is arranged in the base station under the subscriber equipment, and said closed-loop power control device comprises:

The demodulation coding module; Be used for Dedicated Physical Control Channel (DPCCH), strengthen Dedicated Physical Control Channel (E-DPCCH) and strengthen Dedicated Physical Data Channel (E-DPDCH) and carry out descrambling and de-spreading, and said E-DPCCH and said E-DPDCH are deciphered to obtain the channel quality information of said E-DPCCH and said E-DPDCH with the picked up signal interference ratio;

The target sir configuration module is used for according to said signal-to-jamming ratio and said channel quality information configuration target sir; And

Power control module is used for according to the said closed power of controlling subscriber equipment through the target sir of configuration.

2. closed-loop power control device according to claim 1 is characterized in that, said demodulation coding module comprises:

Demodulation module is used for said DPCCH, said E-DPCCH and said E-DPDCH are carried out descrambling and de-spreading with the picked up signal interference ratio; And

Decoding module is used for said E-DPCCH and said E-DPDCH are deciphered, to obtain the said channel quality information of said E-DPCCH and said E-DPDCH.

3. closed-loop power control device according to claim 2 is characterized in that, said decoding module comprises:

The E-DPCCH decoding module is used for said E-DPCCH is deciphered,

To obtain the channel quality information of said E-DPCCH; And

The E-DPDCH decoding module is used for said E-DPDCH is deciphered, and whether correctly exports ACK or NACK according to decoding, as the channel quality information of said E-DPDCH.

4. closed-loop power control device according to claim 3 is characterized in that, said target sir configuration module comprises:

The high speed uplink packet access (HSUPA) business scheduler module is used for the scheduling high-speed uplink grouping access service, with the authorization of service (SG) that obtains said subscriber equipment;

The target sir comparison module; Be used for the comparative result and first threshold values of said target sir and said signal-to-jamming ratio are compared; The number and second threshold values of said NACK are compared; Number and the 3rd threshold values of said ACK are compared, and/or said SG is compared with using power ratio (LUPR) recently; And

The target sir control module, the comparative result of a plurality of comparisons that are used for carrying out according to said target sir comparison module improves or reduces said target sir.

5. a target sir inking device is characterized in that, said target sir inking device is arranged in the base station under the subscriber equipment, and said target sir inking device comprises:

The demodulation coding module is used for DPCCH, E-DPCCH and E-DPDCH are carried out descrambling and de-spreading with the picked up signal interference ratio, and said E-DPCCH and said E-DPDCH are deciphered to obtain the channel quality information of said E-DPCCH and said E-DPDCH;

The target sir configuration module is used for according to said signal-to-jamming ratio and said channel quality information configuration target sir.

6. target sir inking device according to claim 5 is characterized in that, said demodulation coding module comprises:

Demodulation module is used for said DPCCH, said E-DPCCH and said E-DPDCH are carried out descrambling and de-spreading with the picked up signal interference ratio; And decoding module, be used for said E-DPCCH and said E-DPDCH are deciphered, to obtain the said channel quality information of said E-DPCCH and said E-DPDCH.

7. target sir inking device according to claim 6 is characterized in that, said decoding module comprises:

The E-DPCCH decoding module is used for said E-DPCCH is deciphered, to obtain the channel quality information of said E-DPCCH; And

The E-DPDCH decoding module is used for said E-DPDCH is deciphered, and whether correctly exports ACK or NACK according to decoding, as the channel quality information of said E-DPDCH.

8. target sir inking device according to claim 7 is characterized in that, said target sir configuration module comprises:

The high speed uplink packet access (HSUPA) business scheduler module is used for the scheduling high-speed uplink grouping access service, to obtain the SG of said subscriber equipment;

The target sir comparison module; Be used for the comparative result and first threshold values of said target sir and said signal-to-jamming ratio are compared; The number and second threshold values of said NACK are compared; Number and the 3rd threshold values of said ACK are compared, and/or said SG and LUPR are compared; And

The target sir control module, the comparative result of a plurality of comparisons that are used for carrying out according to said target sir comparison module improves or reduces said target sir.

9. a close-loop power controlling method is characterized in that, said close-loop power controlling method is used for the base station under the subscriber equipment, said method comprising the steps of:

S502 carries out descrambling and de-spreading with the picked up signal interference ratio to DPCCH, E-DPCCH and E-DPDCH, and said E-DPCCH and said E-DPDCH are deciphered to obtain the channel quality information of said E-DPCCH and said E-DPDCH;

S504 is according to said signal-to-jamming ratio, said channel quality information configuration target sir; And

S506 is according to the said closed power of controlling subscriber equipment through the target sir of configuration.

10. close-loop power controlling method according to claim 9 is characterized in that, said step S502 comprises:

S5022 is to said DPCCH, said E-DPCCH, and said E-DPDCH

Carry out descrambling and de-spreading to obtain said signal-to-jamming ratio; And

S5024, to said E-DPCCH, and said E-DPDCH decipher, to obtain said E-DPCCH, and the said channel quality information of said E-DPDCH.

11. close-loop power controlling method according to claim 10 is characterized in that, said step S5024 comprises:

S5024-2 deciphers said E-DPCCH, to obtain the channel quality information of said E-DPCCH; And

S5024-4 deciphers said E-DPDCH, and whether correctly exports ACK or NACK according to decoding, as the channel quality information of said E-DPDCH.

12. close-loop power controlling method according to claim 11 is characterized in that, said step S504 comprises:

S5042, the scheduling high-speed uplink grouping access service is to obtain the SG of said subscriber equipment;

S5044 judges in said step S5024-2, whether successfully to have obtained said channel quality information, or whether the comparative result of judging said target sir and said signal-to-jamming ratio is greater than first threshold values;

S5046; If successfully obtained said channel quality information; Or the comparative result of said target sir and said signal-to-jamming ratio is greater than said first threshold values, then with the number of said NACK and second threshold values relatively, otherwise said target sir improved first decibel value;

S5048 if the number of said NACK is not more than said second threshold values, then compares said ACK number and the 3rd threshold values, otherwise said target sir is improved second decibel value;

S5050 is if said ACK less than said the 3rd threshold values, then with the comparative result of said SG and LUPR and the 4th threshold values relatively, otherwise reduces the three decibels value with said target sir; And

S5052 if the comparative result of said SG and said LUPR then improves the 4th decibel value with said target sir greater than said the 4th threshold values, otherwise carries out said step S506.

13. a target sir collocation method is characterized in that, said target sir collocation method is used for the base station under the subscriber equipment, said method comprising the steps of:

S502 carries out descrambling and de-spreading with the picked up signal interference ratio to DPCCH, E-DPCCH and E-DPDCH, and said E-DPCCH and said E-DPDCH are deciphered to obtain the channel quality information of said E-DPCCH and said E-DPDCH; And

S504 is according to said signal-to-jamming ratio, said channel quality information configuration target sir.

14. target sir collocation method according to claim 13 is characterized in that, said step S502 comprises:

S5022, to said DPCCH, said E-DPCCH, and said E-DPDCH carry out descrambling and de-spreading to obtain said signal-to-jamming ratio; And

S5024, to said E-DPCCH, and said E-DPDCH decipher, to obtain said E-DPCCH, and the said channel quality information of said E-DPDCH.

15. target sir collocation method according to claim 14 is characterized in that, said step S5024 comprises:

S5024-2 deciphers said E-DPCCH, to obtain the channel quality information of said E-DPCCH; And

S5024-4 deciphers said E-DPDCH, and whether correctly exports ACK or NACK according to decoding, as the channel quality information of said E-DPDCH.

16. target sir collocation method according to claim 15 is characterized in that, said step S504 comprises:

S5042, the scheduling high-speed uplink grouping access service is to obtain the SG of said subscriber equipment;

S5044 judges in said step S5024-2, whether successfully to have obtained said channel quality information, or whether the comparative result of judging said target sir and said signal-to-jamming ratio is greater than first threshold values;

S5046; If successfully obtained said channel quality information; Or the comparative result of said target sir and said signal-to-jamming ratio is greater than said first threshold values, then with the number of said NACK and second threshold values relatively, otherwise said target sir improved first decibel value;

S5048, if the number of said NACK is not more than said second threshold values, then number and the 3rd threshold values with said ACK compares, otherwise said target sir is improved second decibel value;

S5050 is if the number of said ACK less than said the 3rd threshold values, then with the comparative result of said SG and LUPR and the 4th threshold values relatively, otherwise reduces the three decibels value with said target sir; And

S5052 is if the comparative result of said SG and said LUPR then improves the 4th decibel value with said target sir greater than said the 4th threshold values.

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