CN115549883A - Multi-track system fast AMC method - Google Patents
Multi-track system fast AMC method Download PDFInfo
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Abstract
The invention relates to the technical field of wireless communication, in particular to a multi-track system rapid AMC method, which comprises the following contents: s2: when the preset starting condition is met, initializing an inner ring MCS corresponding to each track of the First period according to parameter setting; s3: counting the scheduling result of each track, initializing the outer ring MCS corresponding to each track, and updating the outer ring MCS at any moment according to the scheduling result; calculating a scheduling MCS corresponding to each track according to the inner ring MCS and the outer ring MCS; judging whether a period node is reached, if so, executing S4, and if not, executing S3; s4: and counting Blers corresponding to each track according to the scheduling result, judging whether the Blers meet a preset exit condition, if so, executing a preset single-track AMC, and if not, updating the inner-loop MCS of each track in the next period according to the scheduling MCS, and executing S3. By adopting the scheme, the technical problem of low convergence speed of the MCS scheduling in the prior art can be solved.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a multi-track system rapid AMC method.
Background
AMC, called adaptation modulation and coding, namely: adaptive modulation and coding is a very important technology in wireless systems. If a modulation mode with a lower order number is selected in the system, although the stability of the system can be ensured, the transmission rate is very low; similarly, if a modulation scheme with a higher order number is selected in the system, although the transmission rate is higher, the system stability is poor, and a large number of bit errors occur. Since the real wireless channel is affected by many external factors and is changed rapidly, how to select a scheduling MCS (Modulation and coding Scheme) that can match the current channel state is particularly important in the wireless communication system.
The AMC technology commonly used in the prior art determines a scheduling MCS by using logic of an inner loop and an outer loop, where the inner loop is: determining an inner loop MCS according to a measurement result of the channel state information; the outer loop corrects the inner loop MCS according to the real scheduling result, and the final scheduling MCS is determined by the sum of the inner loop and the outer loop.
However, when there is no measurement information such as a measurement result of CSI (Channel state information) Channel state information, for example, in a process of determining a downlink MCS, when the base station does not acquire CQI (Channel Quality Indicator) information; and when the measurement result for determining the channel state information of the inner loop has an excessive error. At this time, the scheduled MCS can be converged only by the outer ring slowly, so that the scheduled MCS is matched with the current channel state, and therefore, the prior art has the following disadvantages:
1. the convergence process of the dispatching MCS is slow, and the performance of the system is limited;
2. since the channel information state changes rapidly, and the convergence process of the scheduling MCS is slow at this time, the scheduling MCS of the system cannot be converged.
Disclosure of Invention
The invention aims to provide a multi-track system fast AMC method to solve the technical problem of low convergence speed of scheduling MCS in the prior art.
The present invention provides the following basic scheme:
a multi-track system fast AMC method comprises the following contents:
s2: when the preset starting condition is met, initializing an inner ring MCS corresponding to each track of the First period according to parameter setting;
s3: counting the scheduling result of each track, initializing the outer ring MCS corresponding to each track, and updating the outer ring MCS at any moment according to the scheduling result; calculating a scheduling MCS corresponding to each track according to the inner ring MCS and the outer ring MCS; judging whether a period node is reached, if so, executing S4, and if not, executing S3;
s4: and counting Blers corresponding to each track according to the scheduling result, judging whether the Blers meet a preset exit condition, if so, executing a preset single-track AMC, and if not, updating the inner-loop MCS of each track in the next period according to the scheduling MCS, and executing S3.
Description of the nouns: AMC is called adaptive modulation and coding, and refers to adaptive modulation and coding technology; the MCS is called Modulation and coding Scheme, and refers to Modulation and coding Scheme.
The basic scheme has the beneficial effects that:
by adopting the scheme, the multi-track AMC is set, whether the preset starting condition is met or not is judged in the running process of the single-track AMC, and the multi-track AMC is carried out under the condition that the preset starting condition is met. The multi-track AMC initializes the inner ring MCS corresponding to each track of the First period through parameter setting, compared with the prior art, the measurement result of CSI channel state information does not need to be obtained, and the condition that slow convergence needs to be carried out through the outer ring MCS because corresponding information cannot be obtained is avoided.
Meanwhile, the scheme obtains the scheduling MCS based on the inner ring MCS and the outer ring MCS. And counting Bler through a scheduling result to judge whether the multi-track AMC exits, and updating the inner-loop MCS of the next cycle based on the scheduling MCS of the current cycle when the multi-track AMC is continuously executed, so that the rapid convergence of the scheduling MCS is realized, the scheduling MCS is rapidly matched with the current channel state, and the limitation of the system performance caused by the too low convergence speed is avoided.
Further, the following contents are included:
s1: judging whether a preset starting condition is met, and if the preset starting condition is met, executing S2; the preset starting conditions include: the UE state or corresponding CSI information changes.
Has the beneficial effects that: when the UE state or the corresponding CSI information changes, multi-track AMC is triggered to quickly converge, for example, when the number of UE scheduling streams changes; when a change in UE transmission mode (BF/PMI) occurs; when the UE is accessed again or newly; when the CSI corresponding to the UE is changed greatly, the UE can be triggered to enter multi-track AMC.
Further, S2 specifically includes the following:
s201: defining a main track and an auxiliary track, judging whether CSI information related to scheduling can be acquired or not, if the CSI information can not be acquired, executing S2011, and if the CSI information is acquired, executing S2012;
s2011: acquiring MCS4PPathNoCSI with the parameters set, and initializing the inner ring MCS of the main track to be equal to the MCS4PPathNoCSI;
s2012: and obtaining a mapping value according to the obtained CSI information and a preset mapping table, and initializing an inner ring MCS of the main track to be equal to the mapping value.
Description of the nouns: MCS4PPathNoCSI is a parameter set in advance, which means that the initial MCS is for the main track when CSI cannot be acquired.
Has the beneficial effects that: when the CSI information can be obtained, the corresponding inner-ring MCS is mapped out for initialization through the mapping table according to the CSI information, and when the CSI information cannot be obtained, the inner-ring MCS is initialized through the preset parameters, so that the inner-ring MCS is determined to guarantee the convergence speed of the dispatching MCS.
Further, S2 also includes the following:
s202: and calculating the inner ring MCS of each auxiliary track according to the inner ring MCS of the main track, the interval of the main track and the auxiliary track and the preset DeltaMCS4Path.
Description of the nouns: deltaMCS4Path is a parameter set in advance, and means the difference of MCS between tracks.
Has the beneficial effects that: thereby determining the inner loop MCS of each secondary track.
Further, S4 specifically includes the following:
s401: the scheduling result comprises ACK or NACK at each moment, and the Bler corresponding to each track is calculated according to the scheduling result and the following formula:
bler = NACK sum/(NACK sum + ACK sum).
Description of the nouns: the ACK is called Acknowledgement, and means positive Acknowledgement; NACK is collectively called Negative Acknowledgement, which means Negative Acknowledgement.
Has the advantages that: thereby calculating the Bler of each track according to the scheduling result.
Further, S4 also includes the following:
s402: the preset exit condition is that the Blers corresponding to the tracks tend to two sides of the preset targetBell, when the Blers corresponding to the tracks are both larger or both smaller than the targetBell, the exit condition is judged not to be met, otherwise, the exit condition is judged to be met.
Description of the nouns: targetBler is a parameter set in advance, and the meaning of the TargetBler is AMC target Bler.
Has the advantages that: the Bler of each track is used as a judgment condition to determine whether to quit the multi-track AMC.
Further, S4 also includes the following:
s403: when the Bler corresponding to each track is larger than the TargetPuler, comparing the scheduling MCS corresponding to each track at the last moment, and screening the lowest scheduling MCS as the reference MCS0 of the next period;
when the Bler corresponding to each track is smaller than the TargetPuler, comparing the scheduling MCS corresponding to each track at the last moment, and screening the highest scheduling MCS as the reference MCS0 of the next period;
s404: and updating the inner ring MCS of each track in the next period according to the reference MCS 0.
Has the advantages that: there is a multi-track AMC that runs multiple cycles, and the scheduling MCS of the previous cycle is screened as the reference MCS0 of the next cycle, so as to achieve fast convergence of the scheduling MCS.
Further, S404 includes the following:
when Bler corresponding to each track is larger than TargetPuler, the inner ring MCS of each track = reference MCSO-preset track index and preset DeltaMCS4Path;
when Bler corresponding to each track is smaller than TargetBler, the inner loop MCS of each track = reference MCSO + preset track index × preset DeltaMCS4Path.
Has the advantages that: the value of the track index is 1 to the number of tracks, and when the multi-track AMC circulates for a plurality of cycles, the inner loop MCS of each track in the current cycle is calculated according to the reference MCSO in the previous cycle, so that convergence is performed.
Further, executing the preset single-track AMC in S4 is executing S5; the method also comprises the following steps:
s5: obtaining Bler corresponding to each track, screening the track with the smallest difference between the Bler and a preset TargetBler, and obtaining a scheduling MCS of the screened track at the last moment as an initial scheduling MCS of the single-track AMC;
acquiring an inner loop MCS corresponding to the original single-track AMC, and calculating an outer loop MCS of the single track according to the inner loop MCS of the single track and an initial scheduling MCS;
acquiring a single-track scheduling result, updating the outer-loop MCS of the single track according to the single-track scheduling result, and updating the scheduling MCS of the single track according to the updated outer-loop MCS;
after single-track AMC is executed, S1 is executed;
s1 further comprises executing S5 if the starting condition is not met.
Has the advantages that: and after exiting the multi-track AMC, entering the single-track AMC, initializing the single-track scheduling MCS of the single-track AMC by the single-track AMC according to the final scheduling MCS of the multi-track AMC, further calculating the initial outer-loop MCS corresponding to the single track, and updating the scheduling MCS at any time by combining the dynamic outer-loop MCS and the inner-loop MCS in the single-track mode so as to realize the single-track AMC.
Drawings
Fig. 1 is a flowchart of an embodiment of a multi-track fast AMC method according to the present invention.
Detailed Description
The following is further detailed by way of specific embodiments:
examples
In the present embodiment, the abbreviations and parameter settings are described in table one and table two:
table-abbreviation legends
| Abbreviations | English full scale | Chinese full scale |
| AMC | AdaptiveModulation and coding | Adaptive modulation and coding techniques |
| LTE | Long Term Evolution | Long term evolution |
| NR | New Radio | New air interface |
| MCS | Modulation and coding Scheme | Modulation and coding scheme |
| CSI | channel state information | Channel state information |
| CQI | Channel Quality Indicator | Channel state indication |
| ACK | Acknowledgement | Positive acknowledgement |
| NACK | Negative Acknowledgement | Negative acknowledgement |
| UE | User Equipment | User equipment |
Table two parameter set description
A multi-track fast AMC method, as shown in fig. 1, comprising the following steps:
s1: judging whether a preset starting condition is met, and if the preset starting condition is met, executing S2; and if the starting condition is not met, executing S5. The preset starting conditions comprise: the UE state or corresponding CSI information changes.
S2: and when the preset starting condition is met, initializing the inner ring MCS corresponding to each track of the First period according to the parameter setting.
S3: counting the scheduling result of each track, initializing the outer ring MCS corresponding to each track, and updating the outer ring MCS at any moment according to the scheduling result; calculating a scheduling MCS corresponding to each track according to the inner ring MCS and the outer ring MCS; and judging whether the periodic node is reached, if so, executing S4, and if not, executing S3.
S4: and counting Blers corresponding to each track according to the scheduling result, judging whether the Blers meet a preset exit condition, if so, executing a preset single-track AMC, and if not, updating the inner-loop MCS of each track in the next period according to the scheduling MCS, and executing S3. Performing the preset single track AMC in S4 is performing S5.
S5: obtaining Bler corresponding to each track, screening the track with the smallest difference between the Bler and a preset TargetBler, and obtaining a scheduling MCS of the screened track at the last moment as an initial scheduling MCS of the single-track AMC; acquiring an inner loop MCS corresponding to the original single-track AMC, and calculating an outer loop MCS of the single track according to the inner loop MCS of the single track and an initial scheduling MCS; and acquiring a single-track scheduling result, updating the outer-loop MCS of the single track according to the single-track scheduling result, and updating the scheduling MCS of the single track according to the updated outer-loop MCS. After performing single-track AMC, S1 is performed.
The starting conditions in S1 are specifically as follows: when the number of UE scheduling streams changes; when a change in UE transmission mode (BF/PMI) occurs; when the UE is accessed again or newly; when the UE corresponding CSI varies greatly.
S2 specifically comprises the following contents:
s201: defining a main track and an auxiliary track, judging whether CSI information related to scheduling can be acquired or not, if the CSI information can not be acquired, executing S2011, and if the CSI information is acquired, executing S2012;
s2011: acquiring MCS4PPathNoCSI with the parameters set, and initializing the inner ring MCS of the main track to be equal to the MCS4PPathNoCSI;
s2012: and obtaining a mapping value according to the obtained CSI information and a preset mapping table, and initializing an inner ring MCS of the main track to be equal to the mapping value.
S202: and calculating the inner ring MCS of each auxiliary track according to the inner ring MCS of the main track, the interval of the main and auxiliary tracks and the preset DeltaMCS4Path.
Taking the example that the number of tracks N4Path is configured to 3, for First Period, the auxiliary tracks are distributed on two sides of the main track as much as possible, that is: there are upper and lower auxiliary tracks.
The upper auxiliary track inner ring MCS = main track inner ring MCS + DeltaMCS4Path n;
the lower auxiliary track inner ring MCS = main track inner ring MCS-DeltaMCS4Path n;
wherein: and n is the spacing distance of the main track and the auxiliary track.
S3 specifically comprises the following contents:
s301: counting the scheduling results of each track, wherein the scheduling results are shown in the third table;
table three track scheduling results (table N = TTINum4 PathUpdate)
Specifically, the ACK/NACK of each track is maintained according to TTI level, and in order to make each track correspond to as many ACK/NACK sample points as possible, the statistical rule is as follows:
1. if the scheduling result corresponding to the high-order MCS is ACK, the scheduling result corresponding to the low-order MCS is also ACK, as shown in the 2/3/N-2 column in the third table;
2. if the scheduling result corresponding to the low-order MCS is NACK, the scheduling result corresponding to the high-order MCS is also NACK, as shown in column 1 in table three;
3. in the total scheduling times TTINum4SPPathUpdate, each track is scheduled randomly, but the final real scheduling total times corresponding to each track are required to be similar or the same, and the real scheduling times corresponding to each track in table three are marked with bold marks, as shown in column 1, line 3 and column 2, line 1.
S302: entering a new period, and initializing the outer ring MCS corresponding to each track to be 0; updating the outer loop MCS according to the scheduling result moment;
s303: calculating a scheduling MCS corresponding to each track according to the inner ring MCS and the outer ring MCS, specifically calculating the scheduling MCS according to the following formula:
scheduling MCS = inner loop MCS + outer loop MCS.
S304: judging whether the period node is reached, specifically: and judging whether the sum of the total scheduling times of each track in the period reaches a preset TTINum4PathUpdate, if so, executing S4, and otherwise, executing S3.
S4 specifically comprises the following contents:
s401: the scheduling result comprises ACK or NACK at each TTI moment, and the Bler corresponding to each track is calculated according to the scheduling result and the following formula:
bler = NACK sum/(NACK sum + ACK sum).
S402: the preset exit condition is that the Blers corresponding to the tracks tend to two sides of the preset TargetBler, when the Blers corresponding to the tracks are larger than or smaller than the TargetBler, the exit condition is judged not to be met, otherwise, the exit condition is judged to be met.
S403: when the Bler corresponding to each track is larger than the TargetBler, comparing the scheduling MCS corresponding to each track at the last moment, and screening the lowest scheduling MCS as the reference MCS0 of the next period;
when the Bler corresponding to each track is smaller than the TargetPuler, comparing the scheduling MCS corresponding to each track at the last moment, and screening the highest scheduling MCS as the reference MCS0 of the next period;
s404: and updating the inner ring MCS of each track in the next period according to the reference MCS 0. The method comprises the following specific steps: when the Bler corresponding to each track in the previous period is larger than the TargetPuler, the inner ring MCS of each track = reference MCSO-preset track index and preset DeltaMCS4Path; when Bler corresponding to each track in the previous cycle is smaller than TargetBler, the inner loop MCS of each track = reference MCSO + preset track index × preset DeltaMCS4Path. Wherein, the track index =1.. N4Path.
The specific implementation process is as follows:
if the UE is the UE which is just accessed, the CSI information related to scheduling is not acquired when the UE is in service, and the condition of one multi-track quick AMC period is experienced.
1. Firstly, whether the UE meets the trigger scene of multi-track system fast AMC is judged
The UE is newly accessed, so the triggering condition of the multi-track fast AMC is met, and the next step is executed.
2. Maintaining inner ring MCS value corresponding to First Period main and auxiliary tracks
Since the number of tracks N4Path is configured to be 3, for First Period, the auxiliary tracks are distributed on both sides of the main track as much as possible, that is: there are upper and lower auxiliary tracks. The difference between the inter-track MCS DeltaMCS4Path =2, mcs4ppathnocic =4, so:
main track inner loop MCS =4;
upper auxiliary orbit inner ring MCS =4+2=6;
lower secondary track inner loop MCS =4-2=2.
3. Maintaining ACK/NACK correspondence for each track
Assuming that the ACK/NACK statistics for each track in a complete cycle are shown in table four:
table four ACK/NACK statistics for each track
| TTI_index | 1 | 2 | 3 | 58 | 59 | 60 | |
| Upper auxiliary track (MCS = 6) | NACK | ACK | ... | ACK | NACK | ||
| Main track (MCS = 4) | NACK | ACK | ACK | ... | ACK | ||
| Lower auxiliary track (MCS = 2) | NACK | ACK | ACK | ... | ACK | ACK |
4. Maintaining outer loop MCS values corresponding to each track
Initializing the outer ring value corresponding to each track in First period to be 0, updating the outer ring value corresponding to each track at all times in each period scheduling process, and keeping the original outer ring maintenance logic unchanged.
Suppose that in First period, the outer loop MCS corresponding to each track is shown in table five:
outer loop MCS corresponding to five tracks in table
| TTI_index | 1 | 2 | 3 | 58 | 59 | 60 | |
| Upper auxiliary track | 0 | x | x | ... | Z1 | Z1 | Z5 |
| Main track | 0 | x | y | ... | Z2 | Z2 | Z2 |
| Lower auxiliary track | 0 | x | y | ... | Z3 | Z4 | Z6 |
5. Maintaining scheduling MCS values corresponding to each track
Assume that the scheduling MCS for each track is shown in table six during one complete cycle:
scheduling MCS corresponding to six tracks in table
| TTI_index | 1 | 2 | 3 | 58 | 59 | 60 | |
| Upper auxiliary track | 6 | 6+x | 6+x | ... | 6+Z1 | 6+Z1 | 6+Z5 |
| Main track | 4 | 4+x | 4+y | ... | 4+Z2 | 4+Z2 | 4+Z2 |
| Lower auxiliary track | 2 | 2+x | 2+y | ... | 2+Z3 | 2+Z4 | 2+Z6 |
The MCS interval problem is also considered for scheduling MCS, assuming that the MCS is all within the valid range.
6. Judging whether the current scheduling reaches the period node
If the sum of the total scheduling times of the tracks in the current period does not reach the condition TTINum4PathUpdate =60 times, the loop is executed 3 to 5 times.
Assuming that the sum of the total scheduled times of the tracks in the current period reaches the condition TTINum4PathUpdate =60 times, the next step is performed.
7. Counting Bler corresponding to each track
And (3) counting the number of ACK/NACK corresponding to each track in the period, and assuming that:
the ACK dispatching times corresponding to the upper auxiliary track are 40, and the NACK dispatching times are 10;
the ACK dispatching times corresponding to the main track are 55, and the NACK dispatching times are 5;
the ACK dispatching times corresponding to the lower auxiliary track are 58, and the NACK dispatching times are 2;
then in this period: go up and assist the track, main track, the lower Bler that assists the track and correspond respectively is: 20 percent; 8.3 percent; 3.3 percent.
8. Judging whether to quit multi-track system fast AMC mechanism
Since 20% > TargetBler >8.3%, the multi-track fast AMC mechanism is exited for the moment, and the closest to the target Bler is the primary track, and the final MCS corresponding to the primary track in the period is 4+ Z2, so:
TargetInitialMCS4SinPath＝4+Z2。
9. updating the initial value of the outer loop corresponding to the original single-track AMC
Assuming that the inner loop MCS corresponding to the current single-track MCS, inloomcs 4SinPat =4, the initial value of the outer loop corresponding to the original single-track AMC is:
OutLoopInitialMCS4SinPath＝TargetInitialMCS4SinPath-InLoopMCS4SinPath
＝4+Z2-4＝Z2。
and updating the single-track outer loop MCS according to the single-track AMC scheduling result (ACK/NACK), and further dynamically updating the scheduling MCS value corresponding to the single track.
And then 1 to 9 are executed in a loop.
If the UE is the UE which is just accessed, the relevant CSI information is not obtained when the UE is in service, and the condition of two multi-track quick AMC periods is experienced.
Wherein 1_1-1 _6is the same as 1-6 above and will not be described here.
1_7, counting Blers corresponding to each track
Counting the number of ACK/NACK corresponding to each track in Step1_3, and assuming that in the period:
the ACK scheduling times corresponding to the upper auxiliary track are 46, and the NACK scheduling times are 4;
the ACK dispatching times corresponding to the main track are 56, and the NACK dispatching times are 4;
the ACK dispatching times corresponding to the lower auxiliary track are 58, and the NACK dispatching times are 2;
then in this cycle: go up and assist the track, main track, the lower Bler that assists the track and correspond respectively is: 8 percent; 6.7 percent; 3.3 percent.
1_8, judging whether to release multi-track fast AMC mechanism
Since TargetBler >8% >6.7% >3.3%, the UE enters the second cycle (2 nd period) of the multi-track fast AMC, performing the 2_2-2 _9step.
The corresponding scheduling MCSs of the upper auxiliary track, the main track and the lower auxiliary track in the last moment (namely, the periodic node) in the period (First period) are respectively as follows: 6+ Z5,4+ Z2,2+ Z6, wherein 6+ Z5 >.
2_2, and maintaining inner ring MCS value corresponding to each track of 2nd Period
Because the Bler (step 1_ 7) value corresponding to each track of First period is below TargetBler, the inner ring MCS corresponding to each track in the 2nd period is:
track 1: MCS0+ DeltaMCS4Path = (6 + Z5) + 2+Z5;
the track 2: MCS0+2 DeltaMCS4Path = (6 + Z5) +2= 10+ Z5;
track 3: MCS0+ N4Path DeltaMCS4Path = (6 + Z5) +3 +2= 12+ Z5;
2 \ u 3, maintaining ACK/NACK for each track
Assuming that within 2nd period, the ACK/NACK statistics for each track are shown in table seven:
ACK/NACK corresponding to seven tracks of the table
| TTI_index | 1 | 2 | 3 | 58 | 59 | 60 | |
| Track 3 | NACK | ACK | ... | ACK | NACK | ||
| Track 2 | NACK | ACK | ACK | ... | ACK | ||
| Track 1 | NACK | ACK | ACK | ... | ACK | ACK |
2 u 4, maintaining outer ring MCS value corresponding to each track
Initializing the outer ring value corresponding to each track in 2nd period to be 0, updating the outer ring value corresponding to each track constantly in each period scheduling process, and keeping the original outer ring maintenance logic unchanged.
Assuming that within 2nd period, the outer loop MCS for each track is shown in Table eight:
outer ring MCS corresponding to eight tracks in table
| TTI_index | 1 | 2 | 3 | 58 | M9 | M0 | |
| Track 3 | 0 | X2 | X2 | ... | M1 | M1 | M5 |
| Track 2 | 0 | X2 | Y2 | ... | M2 | M2 | M2 |
| Track 1 | 0 | X2 | Y2 | ... | M3 | M4 | M6 |
2_5, maintaining scheduling MCS value corresponding to each track
Assuming that within 2nd period, the scheduling MCS corresponding to each track is shown in Table nine:
scheduling MCS corresponding to nine tracks in table
The MCS interval problem is also considered for scheduling MCS, assuming that the MCS is all within the valid range.
2, judging whether the current scheduling reaches the period node
If the condition TTINum4PathUpdate =60 times is not reached for the total scheduling times of each track in the current period, then loop execution is performed for 2_3 to 2_5.
Assuming that the sum of the total scheduling times of the tracks in the current period reaches the condition TTINum4PathUpdate =60 times, the next step is executed
2 \ u 7, counting Bler corresponding to each track
Counting the number of ACK/NACK corresponding to each track in 2_3, and assuming that in the period:
the ACK dispatching times corresponding to the track 3 are 42, and the NACK dispatching times are 11;
the ACK dispatching times corresponding to the track 2 are 55, and the NACK dispatching times are 6;
the ACK dispatching times corresponding to the track 1 are 50, and the NACK dispatching times are 4;
then in this period: the blers corresponding to the track 3, the track 2 and the track 1 are respectively: 20.8 percent; 9.8 percent; 7.4 percent.
2_8, determining whether to release the multi-track fast AMC mechanism
Since 20.8% > TargetBelr >9.8%, the multi-track fast AMC mechanism is exited for the moment, and the closest to target Bler is track 2, and the final MCS corresponding to track 2 in this period (2 nd period) is 10+ Z5+ M2, so:
TargetInitialMCS4SinPath＝10+Z5+M2。
enter 2 u 9
2_9: updating the initial value of the outer loop corresponding to the original single-track AMC
Assuming that the inner loop MCS corresponding to the current single-track MCS, inloomcs 4SinPat =6, the initial value of the outer loop corresponding to the original single-track AMC at this time is:
OutLoopInitialMCS4SinPath＝TargetInitialMCS4SinPath-InLoopMCS4SinPath
＝10+Z5+M2-6＝4+Z5+M2。
and then updating the single-track outer-loop MCS according to a single-track AMC scheduling result (ACK/NACK), and further dynamically updating the scheduling MCS value corresponding to the single track.
Then, 2\ u 1 to 2_9 are executed in a loop.
The foregoing are embodiments of the present invention and are not intended to limit the scope of the invention to the particular forms set forth in the specification, which are set forth in the claims below, but rather are to be construed as the full breadth and scope of the claims, as defined by the appended claims, as defined in the appended claims, in order to provide a thorough understanding of the present invention. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several variations and modifications can be made, which should also be considered as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the utility of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (9)
1. A multi-track system fast AMC method is characterized by comprising the following contents:
s2: when the preset starting condition is met, initializing an inner ring MCS corresponding to each track of the First period according to parameter setting;
s3: counting the scheduling result of each track, initializing the outer ring MCS corresponding to each track, and updating the outer ring MCS at any moment according to the scheduling result; calculating a scheduling MCS corresponding to each track according to the inner ring MCS and the outer ring MCS; judging whether a period node is reached, if so, executing S4, and if not, executing S3;
s4: and counting Blers corresponding to each track according to the scheduling result, judging whether the Blers meet a preset exit condition, if so, executing a preset single-track AMC, and if not, updating an inner-loop MCS of each track in the next period according to the scheduling MCS, and executing S3.
2. The multi-track fast AMC method according to claim 1, further comprising:
s1: judging whether a preset starting condition is met, and if the preset starting condition is met, executing S2; the preset starting conditions comprise: the UE state or corresponding CSI information changes.
3. The multi-track fast AMC method according to claim 1, wherein S2 specifically comprises the following:
s201: defining a main track and an auxiliary track, judging whether CSI (channel state information) related to scheduling can be acquired or not, if the CSI cannot be acquired, executing S2011, and if the CSI is acquired, executing S2012;
s2011: acquiring MCS4PPathNoCSI with the parameters set, and initializing the inner ring MCS of the main track to be equal to the MCS4PPathNoCSI;
s2012: and obtaining a mapping value according to the obtained CSI information and a preset mapping table, and initializing an inner ring MCS of the main track to be equal to the mapping value.
4. A multi-track fast AMC method according to claim 3, characterized in that S2 further comprises the following:
s202: and calculating the inner ring MCS of each auxiliary track according to the inner ring MCS of the main track, the interval of the main track and the auxiliary track and the preset DeltaMCS4Path.
5. The multi-track fast AMC method according to claim 1, wherein S4 specifically comprises the following contents:
s401: the scheduling result comprises ACK or NACK at each moment, and the Bler corresponding to each track is calculated according to the scheduling result and the following formula:
bler = NACK sum/(NACK sum + ACK sum).
6. The method of claim 1, wherein S4 further comprises the following:
s402: the preset exit condition is that the Blers corresponding to the tracks tend to two sides of the preset TargetBler, when the Blers corresponding to the tracks are larger than or smaller than the TargetBler, the exit condition is judged not to be met, otherwise, the exit condition is judged to be met.
7. The method of claim 6, wherein S4 further comprises the following:
s403: when the Bler corresponding to each track is larger than the TargetPuler, comparing the scheduling MCS corresponding to each track at the last moment, and screening the lowest scheduling MCS as the reference MCS0 of the next period;
when the Bler corresponding to each track is smaller than the TargetPuler, comparing the scheduling MCS corresponding to each track at the last moment, and screening the highest scheduling MCS as the reference MCS0 of the next period;
s404: and updating the inner ring MCS of each track in the next period according to the reference MCS 0.
8. The multi-track fast AMC method according to claim 7, wherein S404 comprises the following contents:
when the Bler corresponding to each track is larger than the TargetBler, the inner ring MCS of each track = reference MCSO-preset track index and preset Delta MCS4Path;
when the Bler corresponding to each track is smaller than TargetBler, the inner ring MCS of each track = reference MCSO + preset track index × preset DeltaMCS4Path.
9. The multi-track fast AMC method according to claim 2, characterized in that: executing the preset single-track AMC in the S4 as executing S5; the method also comprises the following contents:
s5: acquiring Blers corresponding to all the tracks, screening the track with the smallest difference value between the Blers and a preset TargetBler, and acquiring a scheduling MCS of the screened track at the last moment as an initial scheduling MCS of the single-track AMC;
acquiring an inner loop MCS corresponding to the original single-track AMC, and calculating an outer loop MCS of the single track according to the inner loop MCS of the single track and an initial scheduling MCS;
acquiring a single-track scheduling result, updating the outer-loop MCS of the single track according to the single-track scheduling result, and updating the scheduling MCS of the single track according to the updated outer-loop MCS;
after single-track AMC is executed, S1 is executed;
s1 further comprises executing S5 if the starting condition is not met.
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