CN111082892A - Method and device for correcting SINR - Google Patents

Method and device for correcting SINR Download PDF

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Publication number
CN111082892A
CN111082892A CN201811220983.4A CN201811220983A CN111082892A CN 111082892 A CN111082892 A CN 111082892A CN 201811220983 A CN201811220983 A CN 201811220983A CN 111082892 A CN111082892 A CN 111082892A
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window
sinr
regulation
length
window length
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刘建颖
周欣
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Potevio Information Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1657—Implicit acknowledgement of correct or incorrect reception, e.g. with a moving window

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Abstract

The application discloses a method and a device for correcting SINR, comprising the following steps: converting the CQI reported by the UE into a corresponding SINR by using the mapping relation between the CQI and the SINR; respectively counting the number of ACK in an up-regulation window and the number of NACK in a down-regulation window according to the length of the up-regulation window and the length of the down-regulation window, obtaining an accumulated SINR regulation value delta-SINR and SINR regulation times according to the counting result and set conditions, and adding the delta-SINR to the SINR to obtain an adjusted SINR; adjusting the length of an up-regulation window and/or the length of a down-regulation window according to the SINR adjustment times, adjusting the length of a down-regulation window according to the adjustment of the length of the up-regulation window, or adjusting the length of an up-regulation window according to the adjustment of the length of the down-regulation window; and obtaining candidate MCS and the repetition times according to the adjusted SINR table look-up. By applying the technical scheme disclosed by the application, the SINR adjustment algorithm can be more flexible, and the change of a channel can be tracked better.

Description

Method and device for correcting SINR
Technical Field
The present application relates to the field of communications technologies, and in particular, to a method and a device for correcting an SINR.
Background
The downlink Adaptive Modulation and Coding (AMC) algorithm includes three modules, which are respectively: a Channel Quality Indication (CQI) adjustment module, a signal to interference and noise ratio (SINR) maintenance module, a Modulation and Coding Scheme (MCS) and repetition number selection module. The downlink AMC algorithm comprises the following steps:
the CQI adjusting module is used for adjusting the value of the CQI index through the set up-regulation and down-regulation conditions according to the received ACK/NACK feedback queue by the UE and adjusting the adjusted CQIIndexadjThe value is output to the SINR maintenance module. The SINR maintenance module carries out CQIidex according to the CQI mapping tableadjConverting into corresponding SINR value, performing reliability correction on the SINR value according to SINRoffset value set by OM, and correcting the corrected SINRadjAnd outputting the data to the MCS and the repetition number selection module. The MCS and repetition number selection module selects the SINR according to the corrected SINRadjAnd a queue for selecting a candidate set of the MCS and the number of Physical Downlink Shared Channel (PDSCH) repetitions that satisfy the condition.
The CQI adjustment module configures window length, CQI down threshold CQI _ down _ th, and CQI up threshold CQI _ up _ th parameters, specifically:
counting the number of ACK/NACK in the window length;
if the number of NACK reaches CQI _ down _ th _ window (the window is not required to be full), down-regulating the CQI index, clearing the number of ACK and NACK in the statistical window, sliding the statistical window backwards and counting again;
and if the number of the ACKs reaches CQI _ up _ th window (the window is not required to be full), the CQI index is adjusted upwards, the number of the ACKs and the number of the NACKs in the statistical window are cleared, the statistical window slides backwards, and the counting is carried out again.
In the prior art, the window length and the CQI up-regulation and down-regulation thresholds in the CQI regulation module are fixed values and are obtained by base station configuration, and cannot be dynamically regulated according to the channel quality. The above-mentioned fixed arrangement has the following disadvantages:
on one hand, when the channel condition is poor or the CQI _ index reported by the UE is larger, more NACKs are fed back, but the window length configured by the network is too long, for example, the window length is configured to 80, and the down-regulation threshold is configured to 0.1, that is, the CQI _ index is down-regulated only when 8 NACKs are detected, and as a result, the down-regulation speed is reduced by the fixed value.
On the other hand, when the channel condition is good or the CQI _ index reported by the UE is slightly small, there are more ACKs fed back, and if the window length configured by the network is too short, for example, the window length is configured to be 20, and the uplink threshold is configured to be 1, the CQI _ index is uplink-adjusted when 20 ACKs are detected, which may cause the uplink to be too fast, resulting in an increase in the block error rate.
Disclosure of Invention
The application provides a method and equipment for correcting SINR, so that an SINR adjusting algorithm is more flexible, and the change of a channel can be tracked more.
The application discloses a method for correcting signal to interference plus noise ratio (SINR), which comprises the following steps:
A. converting the CQI reported by the UE into a corresponding SINR by using the mapping relation between the CQI and the SINR;
B. respectively counting the number of ACK in an up-regulation window and the number of NACK in a down-regulation window according to the length of the up-regulation window and the length of the down-regulation window, obtaining an accumulated SINR regulation value delta-SINR and SINR regulation times according to the counting result and set conditions, and adding the delta-SINR to the SINR to obtain an adjusted SINR;
C. adjusting the length of an up-regulation window and/or the length of a down-regulation window according to the SINR adjustment times, adjusting the length of a down-regulation window according to the adjustment of the length of the up-regulation window, or adjusting the length of an up-regulation window according to the adjustment of the length of the down-regulation window;
D. and obtaining candidate MCS and the repetition times according to the adjusted SINR table look-up.
Preferably, the B includes:
step B2: counting the number of the ACKs in the up-regulation window, if the number of the ACKs reaches (the length of the up-regulation window is equal to the up-regulation threshold), executing the step B3, otherwise executing the step B7; when the first execution is carried out, the window length of the up-regulation window uses an initial value window _ length0_ up, otherwise, the window length window _ length _ up of the up-regulation window output in the step C is used;
step B3: judging whether the accumulated delta-SINR reaches the maximum value, if not, executing the step B4, otherwise, ending;
step B4: adding an up-regulation step length to the accumulated delta-SINR;
step B5: adding 1 to the SINR up-regulation counter, and resetting the SINR down-regulation counter;
step B6: the adjusted SINR is: SINRadj＝SINR+delta-SINR；
Step B7: clearing the counted ACK number in the up-regulation window and the NACK number in the down-regulation window;
step B8: counting the number of NACKs in the down-regulation window, if the number of NACKs reaches (the length of the down-regulation window is equal to the down-regulation threshold), executing the step B9, otherwise, ending; during the first execution, the window length of the down-regulation window uses an initial value window _ length0_ down, otherwise, the window length window _ length _ down output in the step C is used;
step B9: judging whether the accumulated delta-SINR reaches the minimum value, if not, executing the step B10, otherwise, ending;
step B10: adding a down-regulation step length to the accumulated delta-SINR;
step B11: and adding 1 to the SINR down-regulation counter, and clearing the SINR up-regulation counter.
Preferably, when the first execution is performed, step B2 is preceded by an initialization operation, which specifically includes:
setting the window length window _ length _ up of the up-regulation window as an initial value window _ length0_ up, wherein the value range is [20,100], and the recommended value is 50;
setting the window length window _ length _ down of the down-regulation window as an initial value window _ length0_ down, wherein the value range is [20,100], and the recommended value is 50;
the value range of the threshold th _ up is [0,1], and the recommended value is 0.99;
the down-regulation threshold th _ down has a value range of [0,1], and a recommended value of 0.1;
the initial value of delta-SINR is set to be 0, the value range of the delta-SINR is [ -6,6], and the recommended value is 1;
the up-regulation step length SINR _ step _ up of delta-SINR has the value range of [1,3] and the recommended value of 1;
the range of the downward adjustment step length SINR _ step _ down of delta-SINR is [ -3, -1], and the recommended value is-1;
the SINR up counter and SINR down counter are set to initial values of 0.
Preferably, C includes:
when the SINR is continuously adjusted down by K1 times, reducing the window length of the down adjustment window; when the SINR is continuously adjusted up by K2 times, the length of an upper adjustment window is increased, wherein the values of K1 and K2 can be equal;
when the window length of the down regulation window is continuously regulated down for M1 times, regulating the window length of the up regulation window down by one step length; when the window length of the down window is continuously adjusted up M2 times, the window length of the down window is adjusted up by one step, wherein the values of M1 and M2 may be equal.
Preferably, C includes:
step C2: judging whether the SINR down-regulation counter is larger than or equal to K, if so, executing a step C3, otherwise, executing a step C5; wherein K is configured by a network, the value range is [1,5], and the recommended value is 2;
step C3: clearing the SINR down-regulation counter;
step C4: adjusting the length of the up-regulation window;
step C5: judging whether the SINR up-regulation counter is larger than or equal to K, if so, executing the step C6, otherwise, ending;
step C6: clearing the SINR up-regulation counter;
step C7: and adjusting the window length of the lower adjusting window.
Preferably, when the first execution is performed, step C2 is preceded by an initialization operation, which specifically includes:
the up-regulation step length win _ step _ up has the value range of [10,30] and the recommended value of 10;
the down-regulation step length win _ step _ down has the value range of [ -30, -10], and the recommended value is-10;
setting the initial values of an up window length change counter and a down window length change counter to 0;
and setting the initial values of the up window length unadjustable counter and the down window length unadjustable counter to be 0.
Preferably, the C4 includes:
step C41: judging whether the window length of the lower adjusting window reaches the minimum value, if so, executing the step C47, otherwise, executing the step C42;
step C42: the window length of the down-regulation window is adjusted by one step length, the counter for changing the window length of the down-regulation window is increased by 1, and the counter for changing the window length of the down-regulation window is reset;
step C43: judging whether the down window length change counter is larger than M, if so, executing the step C44, otherwise, ending; wherein, M is configured by a network, the value range is [1,5], and the recommended value is 2;
step C44: resetting a down window length change counter;
step C45: judging whether the window length of the up-regulation window reaches the minimum value, if not, executing the step C46, otherwise, ending;
step C46: the window length of the up-regulation window is reduced by one step length;
step C47: adding 1 to the down window length non-adjustable counter, and resetting the down window length change counter;
step C48: when the window length of the down window is the minimum value, judging whether the down window length non-adjustable counter is larger than or equal to N, if so, executing the step C49, otherwise, ending; wherein, N is configured by a network, the value range is [1,5], and the recommended value is 2;
step C49: resetting the down-regulation window length non-adjustable counter;
step C410: and setting the length of the up-regulation window as the length of the down-regulation window plus 2 up-regulation steps.
Preferably, the C7 includes:
step C71: judging whether the window length of the up-regulation window reaches the maximum value, if so, executing the step C77, otherwise, executing the step C72;
step C72: the window length of the up-regulation window is up-regulated by one step length, the counter for changing the up-regulation window length is added with 1, and the counter for changing the up-regulation window length is reset;
step C73: judging whether the up window length change counter is larger than or equal to M, if so, executing the step C74, otherwise, ending; wherein, M is configured by a network, the value range is [1,5], and the recommended value is 2;
step C74: resetting the up-regulation window length change counter;
step C75: judging whether the window length of the down regulation window reaches the maximum value, if not, executing the step C76, otherwise, ending;
step C76: adjusting the window length of the down-regulation window by one step length;
step C77: adding 1 to the up-regulation window length non-adjustable counter, and resetting the up-regulation window length change counter;
step C78: when the window length of the up-regulation window is the maximum value, judging whether the counter of the length of the up-regulation window which cannot be regulated is N, if so, executing the step C79, otherwise, ending; wherein N is configured by a network, the value range of N is [1,5], and the recommended value of N is 2;
step C79: resetting an up-regulation window length non-adjustable counter;
step C710: and setting the window length of the down regulation window as the window length of the up regulation window plus 2 down regulation step lengths.
Preferably, D includes:
and when the SINRs corresponding to different repetition times in one MCS level are checked, finding the repetition times smaller than the adjusted SINR, and if any MCSi and Ni meeting the conditions do not exist, selecting the MCSi and Ni corresponding to the SINR value closest to the adjusted SINR as a candidate set.
The present application also provides a device for correcting SINR, including: a CQI conversion SINR module, an SINR adjustment module, a window length adjustment module, and an MCS and repetition number selection module, wherein:
the CQI converting SINR module converts the CQI reported by the UE into corresponding SINR by using the mapping relation between the CQI and the SINR;
the SINR adjusting module respectively counts the number of ACKs in the up-regulation window and the number of NACKs in the down-regulation window according to the up-regulation window length and the down-regulation window length, obtains an accumulated SINR adjusting value delta-SINR according to the counting result and a set condition, provides the SINR adjusting times for the window length adjusting module, and adds the delta-SINR to the SINR to obtain an adjusted SINR;
the window length adjusting module adjusts the up-regulation window length and/or the down-regulation window length according to the SINR adjusting times provided by the SINR adjusting module, adjusts the down-regulation window length according to the adjustment of the up-regulation window length, or adjusts the up-regulation window length according to the adjustment of the down-regulation window length, and provides the adjusted up-regulation window length and the adjusted down-regulation window length to the SINR adjusting module;
and the MCS and repetition number selection module obtains candidate MCS and repetition number according to the adjusted SINR table look-up.
The present application also discloses a non-transitory computer readable storage medium storing instructions that, when executed by a processor, cause the processor to perform the steps of the method of correcting SINR as described previously.
The application also discloses an electronic device comprising the non-volatile computer-readable storage medium as described above, and the processor having access to the non-volatile computer-readable storage medium.
According to the technical scheme, the window length can be dynamically adjusted according to the channel condition, the ACK/NACK number triggering the SINR adjustment is dynamically adjusted, namely the ACK/NACK number triggering the SINR adjustment is dynamically adjusted according to the channel condition, so that the SINR up-adjustment/down-adjustment condition is dynamically adjusted, the SINR adjustment algorithm is more flexible, and the change of a channel can be tracked more.
The invention can increase the speed of down-regulating the SINR and reduce the speed of up-regulating the SINR by dynamically regulating the window length, thereby reducing the ping-pong effect. For example, when the channel condition is not good or the SINR reported by the UE is large, the number of NACKs fed back is large, the SINR can be adjusted down as soon as possible by decreasing the window length in order to adjust the SINR down as soon as possible, and if the channel condition is good, that is, the number of ACKs is large, the SINR can be adjusted up at a slow point by increasing the window length.
Drawings
FIG. 1 is a schematic diagram of a module design of a downlink AMC algorithm according to the present application;
fig. 2 is a flow chart of an SINR adjustment module of the present application;
FIG. 3 is a general flow chart of the window length adjustment module of the present application;
FIG. 4 is a schematic diagram of a sub-process 1 of the window length adjustment module of the present application;
fig. 5 is a schematic diagram of the window length adjustment module sub-process 2 according to the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below by referring to the accompanying drawings and examples.
The CQI is an important information reported by the terminal to the network side, and is used to indicate the current channel quality of the UE. The network side obtains a corresponding SINR value according to the CQI reported by the UE by using the mapping relation between the CQI and the SINR, corrects the SINR value by combining a feedback statistical result (namely ACK/NACK number) (wherein the ACK/NACK number triggering the SINR adjustment is obtained by multiplying the window length by an up/down regulation threshold), and then selects a proper MCS and Ni grade according to the adjusted SINR value to schedule the user.
The invention provides a method for correcting SINR, which dynamically adjusts the window length according to the change of channel conditions, thereby dynamically adjusting the ACK/NACK number triggering the SINR adjustment, enabling the SINR to be corrected according to the change of the channel conditions, and realizing the rapid and accurate adjustment of MCS and PDSCH repetition times.
One, module design
The invention comprises four modules, which are respectively: a CQI conversion SINR module, an SINR adjustment module, an MCS and repetition number selection module, and a window length adjustment module, as shown in FIG. 1. Acquiring CQI reported by a user, converting the CQI into SINR through a CQI conversion SINR module, outputting the converted SINR to an SINR adjusting module, adjusting the SINR according to ACK/NACK feedback and the window length input by the window length adjusting module by the module, outputting the adjusted SINR to an MCS and repetition number selecting module, selecting the MCS and the PDSCH repetition number by the MCS and repetition number selecting module by using the adjusted SINR, and providing the selected MCS and PDSCH repetition number to a scheduling module; the SINR adjusting module also outputs SINR adjusting times to the window length adjusting module, and the window length adjusting module modifies the window length according to the SINR adjusting times and outputs the modified window length to the SINR adjusting module. Specifically, the method comprises the following steps:
the CQI converting SINR module converts the CQI reported by the UE into corresponding SINR by using the mapping relation between the CQI and the SINR;
the SINR adjusting module respectively counts the number of ACKs in the up-regulation window and the number of NACKs in the down-regulation window according to the up-regulation window length and the down-regulation window length, obtains an accumulated SINR adjusting value delta-SINR according to the counting result and a set condition, provides the SINR adjusting times for the window length adjusting module, and adds the delta-SINR to the SINR to obtain an adjusted SINR;
the window length adjusting module adjusts the up-regulation window length and/or the down-regulation window length according to the SINR adjusting times provided by the SINR adjusting module, adjusts the down-regulation window length according to the adjustment of the up-regulation window length, or adjusts the up-regulation window length according to the adjustment of the down-regulation window length, and provides the adjusted up-regulation window length and the adjusted down-regulation window length to the SINR adjusting module;
and the MCS and repetition number selection module obtains candidate MCS and repetition number according to the adjusted SINR table look-up.
Design of two, sub-module
1. CQI-to-SINR module
The terminal reports the CQI to the network side, and then the network side converts the CQI reported by the UE into a corresponding SINR value by using the mapping relation between the CQI and the SINR.
2. SINR adjusting module
Respectively counting the number of ACKs in an up-regulation window and the number of NACKs in a down-regulation window by using the SINR as a regulation reference value, obtaining an accumulated delta-SINR and the SINR regulation frequency by the set conditions, and adding the accumulated delta-SINR to the regulation reference value to obtain a regulated SINR, namely the regulated SINRadjAdjusting the reference value SINR + accumulated delta-SINR.
This module defines the following parameters:
Figure BDA0001834759220000091
initial window length of two smooth windows: initial window length0_ up of the Up Window, respectively, in the range of [20,100%]Recommended value 50, window length window 0_ down for the initial window length of the Down Window, in the range of [20,100%]A recommended value of 50;
Figure BDA0001834759220000092
two threshold values are defined: respectively, an upper adjustment threshold th _ up in the range of [0, 1%]Recommended value 0.99, down-regulation threshold th _ down, range 0,1]Recommend toA value of 0.1;
Figure BDA0001834759220000093
define delta-SINR to be 0 at initial value and range to [ -6,6]The recommended value is 1;
Figure BDA0001834759220000094
two delta-SINR adjustment step sizes are defined, namely delta-SINR up-adjustment step size SINR _ step _ up, and the range is [1,3]]The recommended value is 1, the down-regulation step SINR _ step _ down of delta-SINR is in the range of [ -3, -1]Recommended value-1;
Figure BDA0001834759220000095
two SINR adjustment counters are defined: and the SINR up counter and the SINR down counter have an initial value of 0.
Fig. 2 shows a flow chart of the SINR adjustment module of the present application, where the flow is described as follows:
step 1: initialization: the first execution of the process requires initialization, which may be done using the initial values defined above, and the second execution does not require initialization of the process.
Step 2: and counting the number of the ACKs in the up-regulation window, if the number of the ACKs reaches (the window length of the up-regulation window is th _ up) (the up-regulation window is not required to be full of the window), executing the step 3, otherwise, executing the step 7. If the module is used for the first time, the window length of the up-regulation window uses the initial value window _ length0_ up, otherwise, the window length window _ length _ up of the up-regulation window output by the window length regulation module is used.
And step 3: and judging whether the accumulated delta-SINR reaches the maximum value, if not, executing the step 4, otherwise, ending.
And 4, step 4: the accumulated delta-SINR is added by an up-scaling step.
And 5: and adding 1 to the SINR up-regulation counter, and clearing the SINR down-regulation counter.
Step 6: adjusted SINRadjSINR + cumulative delta-SINR.
And 7: and clearing the counted ACK number in the up-regulation window and the NACK number in the down-regulation window.
And 8: and (4) counting the NACK number in the down regulation window, if the NACK number reaches (the window length of the down regulation window is th _ down) (the window is not required to be full), executing the step (9), and if not, ending the step. If the module is used for the first time, the window length of the down-regulation window uses the initial value window _ length0_ down, otherwise, the window length window _ length _ down of the down-regulation window output by the window length adjustment module is used.
And step 9: and judging whether the accumulated delta-SINR reaches the minimum value, if not, executing the step 10, otherwise, ending.
Step 10: the accumulated delta-SINR is added by a down step.
Step 11: and adding 1 to the SINR down-regulation counter, and clearing the SINR up-regulation counter.
This is done.
3. Window length adjusting module
The module dynamically adjusts the window length according to the change of the channel condition, and the SINR adjustment times can reflect the change of the channel condition, so the module can dynamically adjust the window length of the up-adjustment window and/or the window length of the down-adjustment window according to the SINR adjustment times. Specifically, the method comprises the following steps:
firstly, dynamically adjusting the window length of an up-regulation window and/or a down-regulation window according to a set condition; namely: when the SINR is continuously adjusted down by K1 times, the window length of a down adjustment window is reduced; when the SINR is continuously adjusted up by K2 times, increasing the window length of the upper adjustment window, where the values of K1 and K2 may be equal, and in the following description, taking the case that the values of K1 and K2 are both equal to K as an example;
then, because the adjustment of the up-regulation window or the down-regulation window may cause the adjustment of the window length of the other window, the window length of the down-regulation window is continuously adjusted according to the adjustment of the window length of the up-regulation window, or the window length of the up-regulation window is adjusted according to the adjustment of the window length of the down-regulation window; namely: when the window length of the down regulation window is continuously regulated down for M1 times, regulating the window length of the up regulation window down by one step length; when the window length of the up-adjustment window is continuously adjusted up M2 times, the window length of the down-adjustment window is adjusted up by one step, where the values of M1 and M2 may be equal, and in the following description, the values of M1 and M2 are both equal to M as an example.
This module defines the following parameters:
Figure BDA0001834759220000111
two window adjustment step sizes are defined: respectively, an up step length win step up in the range of [10, 30%]Recommended value is 10, down-regulation step length win _ step _ down, range is [ -30, -10]The recommended value is-10;
Figure BDA0001834759220000112
two window length change counters are defined: an up window length change counter and a down window length change counter, respectively, with an initial value of 0;
Figure BDA0001834759220000113
two window length non-adjustable counters are defined: the counter is respectively an up window length unadjustable counter and a down window length unadjustable counter, and the initial value is 0.
The flow of the window length adjusting module of the present application is shown in fig. 3, and the flow is described as follows:
step 1: initialization: the first execution of the process requires initialization, which may be done using the initial values defined above, and the second execution does not require initialization of the process.
Step 2: and judging whether the SINR down-regulation counter is greater than or equal to K, if so, executing the step 3, otherwise, executing the step 5. Where K is configured by the network, with a range of [1,5], and a recommended value of 2.
And step 3: and clearing the SINR down-regulation counter.
And 4, step 4: and executing the sub-process 1, and adjusting the window length of the up-regulation window.
And 5: and (4) judging whether the SINR up-regulation counter is more than or equal to K, if so, executing the step (6), and if not, ending. Where K is configured by the network, with a range of [1,5], and a recommended value of 2.
Step 6: and clearing the SINR up-regulation counter.
And 7: and executing the sub-process 2, and adjusting the window length of the lower adjusting window.
Sub-scheme 1 is shown in FIG. 4 and is generally described as:
when the SINR is continuously adjusted downwards for K times, if the window length of the downward adjustment window does not reach the minimum value, the window length of the downward adjustment window is adjusted downwards by one step length, when the window length of the downward adjustment window is continuously adjusted downwards for M times, and when the channel condition is changed to be good from difference, the window length of the upward adjustment window is adjusted downwards by one step length for quick up-adjustment;
when the SINR is continuously down-tuned K times, if the down-tuning window length reaches the minimum value, the down-tuning window length continuously reaches the minimum value N times, and at this time, the up-tuning window length is limited, i.e., the up-tuning window length is equal to the down-tuning window length plus 2 up-tuning steps.
The flow shown in fig. 4 specifically includes the following steps:
step 1: and judging whether the window length of the down regulation window reaches the minimum value, if so, executing the step 7, otherwise, executing the step 2.
Step 2: and (4) reducing the window length of the down-regulation window by one step length, adding 1 to a down-regulation window length change counter, and resetting a down-regulation window length non-adjustable counter.
And step 3: and (4) judging whether the down window length is continuously adjusted down for M times, namely judging whether a down window length change counter is larger than M, if so, executing the step (4), otherwise, ending. Where M is configured by the network, with a range of [1,5], and a recommended value of 2.
And 4, step 4: the down window length change counter is cleared.
And 5: and judging whether the window length of the up-regulation window reaches the minimum value, if not, executing the step 6, otherwise, ending.
Step 6: the window length of the up-regulation window is regulated down by one step.
And 7: and adding 1 to the down window length unadjustable counter, and resetting the down window length change counter.
And 8: and when the down-regulation window length is the minimum value, judging whether the down-regulation window length needs to be continuously regulated down for N times, namely judging whether the down-regulation window non-adjustable counter is greater than or equal to N, if so, executing the step 9, otherwise, ending. Where N is configured by the network, with a range of [1,5], and a recommended value of 2.
And step 9: and resetting the down window length non-adjustable counter.
Step 10: the window length of the up-regulation window is equal to the window length of the down-regulation window plus 2 up-regulation steps.
Sub-scheme 2 is shown in FIG. 5, and is generally described as:
when the SINR is continuously adjusted up for K times, if the window length of the up-adjusting window does not reach the maximum value, the up-adjusting window length is adjusted up by one step length, when the up-adjusting window length is continuously adjusted up for M times, when the channel condition is changed from good to bad, in order to adjust down as soon as possible, the down-adjusting window length is adjusted down by one step length;
when the SINR is continuously adjusted up K times, if the window length of the up-adjustment window reaches the maximum value, and when the window length of the up-adjustment window continuously reaches the maximum value N times, a limit is made on the window length of the down-adjustment window, that is, the window length of the down-adjustment window is equal to the window length of the up-adjustment window plus 2 down-adjustment step lengths.
The flow shown in fig. 5 specifically includes the following steps:
step 1: and judging whether the window length of the up-regulation window reaches the maximum value, if so, executing the step 7, otherwise, executing the step 2.
Step 2: and (4) adjusting the window length of the up-regulation window by one step length, adding 1 to the up-regulation window length change counter, and resetting the up-regulation window length non-adjustable counter.
And step 3: and (4) judging whether the up-regulation window length is continuously up-regulated for M times, namely judging whether the up-regulation window length change counter is larger than or equal to M, if so, executing the step (4), otherwise, ending. Where M is configured by the network, with a range of [1,5], and a recommended value of 2.
And 4, step 4: the up window length change counter is cleared.
And 5: and judging whether the window length of the down regulation window reaches the maximum value, if not, executing the step 6, otherwise, ending.
Step 6: the window length of the down window is adjusted by one step.
And 7: and adding 1 to the up-regulation window length non-adjustable counter, and resetting the up-regulation window length change counter.
And 8: and when the length of the up-regulation window is the maximum value, judging whether the length of the up-regulation window needs to be continuously up-regulated for N times, namely judging whether the length of the up-regulation window is not adjustable, if so, executing the step 9, otherwise, finishing. Where N is configured by the network, with a range of [1,5], and a recommended value of 2.
And step 9: and resetting the up-regulation window length non-adjustable counter.
Step 10: and setting the window length of the down regulation window as the window length of the up regulation window plus 2 down regulation step lengths.
4. MSC and repetition number selection module
According to the adjusted SINRadjAnd (3) obtaining candidate MCS and the repetition times by table look-up: finding out the SINR smaller than the SINR when looking at the SINR corresponding to different repetition times in one MCS leveladjSelecting the SINR according to the repetition times if there is no MCSi and Ni meeting the conditionsadjAnd MCSi and Ni corresponding to the closest SINR value are used as a candidate set.
Furthermore, the present application also provides a non-transitory computer readable storage medium storing instructions that, when executed by a processor, cause the processor to perform the steps of the method of correcting SINR as described above.
Further, the present application provides an electronic device comprising the non-volatile computer-readable storage medium as described above, and the processor having access to the non-volatile computer-readable storage medium.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims (12)

1. A method for modifying a signal to interference and noise ratio, SINR, comprising:
A. converting the CQI reported by the UE into a corresponding SINR by using the mapping relation between the CQI and the SINR;
B. respectively counting the number of ACK in an up-regulation window and the number of NACK in a down-regulation window according to the length of the up-regulation window and the length of the down-regulation window, obtaining an accumulated SINR regulation value delta-SINR and SINR regulation times according to the counting result and set conditions, and adding the delta-SINR to the SINR to obtain an adjusted SINR;
C. adjusting the length of an up-regulation window and/or the length of a down-regulation window according to the SINR adjustment times, adjusting the length of a down-regulation window according to the adjustment of the length of the up-regulation window, or adjusting the length of an up-regulation window according to the adjustment of the length of the down-regulation window;
D. and obtaining candidate MCS and the repetition times according to the adjusted SINR table look-up.
2. The method of claim 1, wherein B comprises:
step B2: counting the number of the ACKs in the up-regulation window, if the number of the ACKs reaches (the length of the up-regulation window is equal to the up-regulation threshold), executing the step B3, otherwise executing the step B7; when the first execution is carried out, the window length of the up-regulation window uses an initial value window _ length0_ up, otherwise, the window length window _ length _ up of the up-regulation window output in the step C is used;
step B3: judging whether the accumulated delta-SINR reaches the maximum value, if not, executing the step B4, otherwise, ending;
step B4: adding an up-regulation step length to the accumulated delta-SINR;
step B5: adding 1 to the SINR up-regulation counter, and resetting the SINR down-regulation counter;
step B6: the adjusted SINR is: SINRadj＝SINR+delta-SINR；
Step B7: clearing the counted ACK number in the up-regulation window and the NACK number in the down-regulation window;
step B8: counting the number of NACKs in the down-regulation window, if the number of NACKs reaches (the length of the down-regulation window is equal to the down-regulation threshold), executing the step B9, otherwise, ending; during the first execution, the window length of the down-regulation window uses an initial value window _ length0_ down, otherwise, the window length window _ length _ down output in the step C is used;
step B9: judging whether the accumulated delta-SINR reaches the minimum value, if not, executing the step B10, otherwise, ending;
step B10: adding a down-regulation step length to the accumulated delta-SINR;
step B11: and adding 1 to the SINR down-regulation counter, and clearing the SINR up-regulation counter.
3. The method according to claim 2, wherein, when executed for the first time, step B2 is preceded by an initialization operation, specifically comprising:
setting the window length window _ length _ up of the up-regulation window as an initial value window _ length0_ up, wherein the value range is [20,100], and the recommended value is 50;
setting the window length window _ length _ down of the down-regulation window as an initial value window _ length0_ down, wherein the value range is [20,100], and the recommended value is 50;
the value range of the threshold th _ up is [0,1], and the recommended value is 0.99;
the down-regulation threshold th _ down has a value range of [0,1], and a recommended value of 0.1;
the initial value of delta-SINR is set to be 0, the value range of the delta-SINR is [ -6,6], and the recommended value is 1;
the up-regulation step length SINR _ step _ up of delta-SINR has the value range of [1,3] and the recommended value of 1;
the range of the downward adjustment step length SINR _ step _ down of delta-SINR is [ -3, -1], and the recommended value is-1;
the SINR up counter and SINR down counter are set to initial values of 0.
4. The method of any one of claims 1 to 3, wherein C comprises:
when the SINR is continuously adjusted down by K1 times, reducing the window length of the down adjustment window; when the SINR is continuously adjusted up by K2 times, the length of an upper adjustment window is increased, wherein the values of K1 and K2 can be equal;
when the window length of the down regulation window is continuously regulated down for M1 times, regulating the window length of the up regulation window down by one step length; when the window length of the down window is continuously adjusted up M2 times, the window length of the down window is adjusted up by one step, wherein the values of M1 and M2 may be equal.
5. The method of claim 2 or 3, wherein C comprises:
step C2: judging whether the SINR down-regulation counter is larger than or equal to K, if so, executing a step C3, otherwise, executing a step C5; wherein K is configured by a network, the value range is [1,5], and the recommended value is 2;
step C3: clearing the SINR down-regulation counter;
step C4: adjusting the length of the up-regulation window;
step C5: judging whether the SINR up-regulation counter is larger than or equal to K, if so, executing the step C6, otherwise, ending;
step C6: clearing the SINR up-regulation counter;
step C7: and adjusting the window length of the lower adjusting window.
6. The method according to claim 5, wherein, when executed for the first time, step C2 is preceded by an initialization operation, specifically including:
the up-regulation step length win _ step _ up has the value range of [10,30] and the recommended value of 10;
the down-regulation step length win _ step _ down has the value range of [ -30, -10], and the recommended value is-10;
setting the initial values of an up window length change counter and a down window length change counter to 0;
and setting the initial values of the up window length unadjustable counter and the down window length unadjustable counter to be 0.
7. The method of claim 6, wherein the C4 comprises:
step C41: judging whether the window length of the lower adjusting window reaches the minimum value, if so, executing the step C47, otherwise, executing the step C42;
step C42: the window length of the down-regulation window is adjusted by one step length, the counter for changing the window length of the down-regulation window is increased by 1, and the counter for changing the window length of the down-regulation window is reset;
step C43: judging whether the down window length change counter is larger than M, if so, executing the step C44, otherwise, ending; wherein, M is configured by a network, the value range is [1,5], and the recommended value is 2;
step C44: resetting a down window length change counter;
step C45: judging whether the window length of the up-regulation window reaches the minimum value, if not, executing the step C46, otherwise, ending;
step C46: the window length of the up-regulation window is reduced by one step length;
step C47: adding 1 to the down window length non-adjustable counter, and resetting the down window length change counter;
step C48: when the window length of the down window is the minimum value, judging whether the down window length non-adjustable counter is larger than or equal to N, if so, executing the step C49, otherwise, ending; wherein, N is configured by a network, the value range is [1,5], and the recommended value is 2;
step C49: resetting the down-regulation window length non-adjustable counter;
step C410: and setting the length of the up-regulation window as the length of the down-regulation window plus 2 up-regulation steps.
8. The method of claim 6, wherein the C7 comprises:
step C71: judging whether the window length of the up-regulation window reaches the maximum value, if so, executing the step C77, otherwise, executing the step C72;
step C72: the window length of the up-regulation window is up-regulated by one step length, the counter for changing the up-regulation window length is added with 1, and the counter for changing the up-regulation window length is reset;
step C73: judging whether the up window length change counter is larger than or equal to M, if so, executing the step C74, otherwise, ending; wherein, M is configured by a network, the value range is [1,5], and the recommended value is 2;
step C74: resetting the up-regulation window length change counter;
step C75: judging whether the window length of the down regulation window reaches the maximum value, if not, executing the step C76, otherwise, ending;
step C76: adjusting the window length of the down-regulation window by one step length;
step C77: adding 1 to the up-regulation window length non-adjustable counter, and resetting the up-regulation window length change counter;
step C78: when the window length of the up-regulation window is the maximum value, judging whether the counter of the length of the up-regulation window which cannot be regulated is N, if so, executing the step C79, otherwise, ending; wherein N is configured by a network, the value range of N is [1,5], and the recommended value of N is 2;
step C79: resetting an up-regulation window length non-adjustable counter;
step C710: and setting the window length of the down regulation window as the window length of the up regulation window plus 2 down regulation step lengths.
9. The method of any one of claims 1 to 3, wherein D comprises:
and when the SINRs corresponding to different repetition times in one MCS level are checked, finding the repetition times smaller than the adjusted SINR, and if any MCSi and Ni meeting the conditions do not exist, selecting the MCSi and Ni corresponding to the SINR value closest to the adjusted SINR as a candidate set.
10. An apparatus for modifying SINR, comprising: a CQI conversion SINR module, an SINR adjustment module, a window length adjustment module, and an MCS and repetition number selection module, wherein:
the CQI converting SINR module converts the CQI reported by the UE into corresponding SINR by using the mapping relation between the CQI and the SINR;
the SINR adjusting module respectively counts the number of ACKs in the up-regulation window and the number of NACKs in the down-regulation window according to the up-regulation window length and the down-regulation window length, obtains an accumulated SINR adjusting value delta-SINR according to the counting result and a set condition, provides the SINR adjusting times for the window length adjusting module, and adds the delta-SINR to the SINR to obtain an adjusted SINR;
the window length adjusting module adjusts the up-regulation window length and/or the down-regulation window length according to the SINR adjusting times provided by the SINR adjusting module, adjusts the down-regulation window length according to the adjustment of the up-regulation window length, or adjusts the up-regulation window length according to the adjustment of the down-regulation window length, and provides the adjusted up-regulation window length and the adjusted down-regulation window length to the SINR adjusting module;
and the MCS and repetition number selection module obtains candidate MCS and repetition number according to the adjusted SINR table look-up.
11. A non-transitory computer readable storage medium storing instructions which, when executed by a processor, cause the processor to perform the steps of the method of correcting SINR according to any one of claims 1 to 9.
12. An electronic device comprising the non-volatile computer-readable storage medium of claim 11, and the processor having access to the non-volatile computer-readable storage medium.
CN201811220983.4A 2018-10-19 2018-10-19 Method and device for correcting SINR Withdrawn CN111082892A (en)

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