CN117997476A - Rapid AMC method and device based on large step length and storage medium - Google Patents
Rapid AMC method and device based on large step length and storage medium Download PDFInfo
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Abstract
The embodiment of the application provides a rapid AMC method, a device and a storage medium based on a large step length, belonging to the technical field of digital information transmission, wherein the method comprises the following steps: acquiring an outer loop result and a signal to noise ratio of a current channel, wherein the outer loop result is used for indicating whether a timer of an outer loop of a current modulation coding mode is effective or not; and based on the outer loop result, determining the magnitude relation between the signal-to-noise ratio of the current channel and a first threshold, and adjusting the step length of the confirming character of the outer loop of the modulation coding mode. According to the fast AMC method, device and storage medium based on the large step length, whether the ACK step length of the MCS outer loop needs to be adjusted under different conditions can be determined through the outer loop result and the signal-to-noise ratio of the current channel, and for the conditions of discrete scheduling and the MCS rising state, the performance of matching with the channel quality and the convergence speed are improved, so that the system spectrum efficiency is improved.
Description
Technical Field
The present application relates to the field of digital information transmission technologies, and in particular, to a fast AMC method, apparatus, and storage medium based on a large step size.
Background
Adaptive modulation and coding (Adaptive Modulation and Coding, AMC) is an extremely important technology in fourth-generation mobile communication and fifth-generation mobile communication systems. The mechanism of AMC can be generally summarized as a "slow-rise and fast-fall" mechanism, namely: at a preset target block error rate (Block Error Ratio, BLER), the modulation coding scheme (Modulation And Coding Scheme, MCS) requires more Acknowledgement Characters (ACKs) for the first order and fewer non-acknowledgement characters (NACKs) for the first order.
According to the outer loop mechanism of the conventional AMC, the mechanism is a slow-rise and fast-fall mechanism, and the step sizes of ACK and NACK are fixed values, so that the mechanism has slower rise steps for the rising situation with better channel conditions, and can reach a convergence state only after a longer time; for the discrete scheduling of the terminal (in the actual situation, a large number of discrete scheduling scenes can appear), the feedback number required by the step-up is discontinuous or insufficient, the step-up cannot be timely performed, the current channel cannot be timely changed, the current channel cannot be matched well, the convergence rate of the MCS is slow, and the frequency spectrum efficiency of the system is reduced.
Disclosure of Invention
The embodiment of the application provides a rapid AMC method and device based on a large step length and a storage medium, which are used for solving the technical problem of low system spectrum efficiency in the related art.
In a first aspect, an embodiment of the present application provides a fast adaptive modulation and coding technique AMC method based on a large step size, including:
acquiring an outer loop result and a signal to noise ratio of a current channel, wherein the outer loop result is used for indicating whether a timer of an outer loop of a current modulation coding mode is effective or not;
And based on the outer loop result, determining the magnitude relation between the signal-to-noise ratio of the current channel and a first threshold, and adjusting the step length of the confirming character of the outer loop of the modulation coding mode.
In some embodiments, the determining the magnitude relation between the signal-to-noise ratio of the current channel and the first threshold and adjusting the confirm character step size of the modulation coding scheme outer loop based on the outer loop result includes:
Under the condition that the outer loop result indicates that the timer of the modulation coding mode outer loop is invalid, determining that the signal to noise ratio of the current channel is not greater than a first threshold;
And adjusting the confirm character step length of the modulation coding mode outer ring to be larger than the original step length.
In some embodiments, the determining the magnitude relation between the signal-to-noise ratio of the current channel and the first threshold and adjusting the confirm character step size of the modulation coding scheme outer loop based on the outer loop result includes:
under the condition that the outer loop result indicates that the timer of the modulation coding mode outer loop is invalid, determining that the signal to noise ratio of the current channel is larger than a first threshold;
And determining the step length of the confirmed character of the outer ring of the modulation coding mode as the original step length.
In some embodiments, the determining the magnitude relation between the signal-to-noise ratio of the current channel and the first threshold and adjusting the confirm character step size of the modulation coding scheme outer loop based on the outer loop result includes:
acquiring a feedback result under the condition that the outer ring result indicates that the timer of the modulation coding mode outer ring is effective;
determining that the signal to noise ratio of the current channel is not greater than a first threshold;
And determining the size relation between the value of the unacknowledged character counter and a second threshold, wherein the value of the unacknowledged character counter is determined based on a feedback result, and the second threshold is used for determining whether the outer loop of the current modulation coding mode is in a convergence state or not.
In some embodiments, the method further comprises:
and under the condition that the value of the unacknowledged character counter is larger than a second threshold, determining the step length of the acknowledged character of the outer ring of the modulation coding mode as the original step length.
In some embodiments, the method further comprises:
and under the condition that the value of the non-acknowledgement character counter is not greater than a second threshold, determining the size relation between the value of the non-acknowledgement character counter and a third threshold, wherein the third threshold is used for determining whether the outer loop of the current modulation coding mode is in a rising state or not.
In some embodiments, the method further comprises:
and updating the value of the unacknowledged character counter to be zero in the case that the value of the unacknowledged character counter is larger than a third threshold.
In some embodiments, the method further comprises:
And under the condition that the value of the unacknowledged character counter is not larger than a third threshold, adjusting the step length of the acknowledged character of the outer ring of the modulation coding mode to be larger than the original step length.
In a second aspect, an embodiment of the present application further provides a fast adaptive modulation and coding AMC apparatus based on a large step size, including:
The first acquisition module is used for acquiring an outer loop result and a signal to noise ratio of a current channel, wherein the outer loop result is used for indicating whether a timer of an outer loop of a current modulation coding mode is effective or not;
And the first determining module is used for determining the magnitude relation between the signal-to-noise ratio of the current channel and the first threshold based on the outer loop result and adjusting the step length of the confirmed character of the outer loop of the modulation coding mode.
In some embodiments, the first determining module comprises:
a first determining submodule, configured to determine that a signal-to-noise ratio of the current channel is not greater than a first threshold when the outer loop result indicates that a timer of an outer loop of a modulation coding scheme fails;
And the first adjusting sub-module is used for adjusting the step length of the confirmed character of the outer ring of the modulation coding mode to be longer than the original step length.
In some embodiments, the first determining module comprises:
a second determining submodule, configured to determine that a signal-to-noise ratio of the current channel is greater than a first threshold when the outer loop result indicates that a timer of the modulation coding scheme outer loop fails;
And the third determination submodule is used for determining the step length of the confirmed character of the outer ring of the modulation coding mode as the original step length.
In some embodiments, the first determining module comprises:
The first acquisition submodule is used for acquiring a feedback result when the outer ring result indicates that the timer of the modulation coding mode outer ring is effective;
A third determining submodule, configured to determine that a signal-to-noise ratio of the current channel is not greater than a first threshold;
And a fourth determining submodule, configured to determine a magnitude relation between a value of a non-acknowledgement character counter and a second threshold, where the value of the non-acknowledgement character counter is determined based on a feedback result, and the second threshold is used to determine whether the outer loop of the current modulation coding mode is in a convergence state.
In some embodiments, the first determining module further comprises:
and a fifth determining submodule, configured to determine that the step length of the confirmed character of the outer ring of the modulation coding mode is an original step length when the value of the unacknowledged character counter is greater than the second threshold.
In some embodiments, the first determining module further comprises:
and the sixth determining submodule is used for determining the size relation between the value of the non-acknowledgement character counter and a third threshold under the condition that the value of the non-acknowledgement character counter is not larger than the second threshold, and the third threshold is used for determining whether the outer loop of the current modulation coding mode is in a rising state or not.
In some embodiments, the first determining module further comprises:
and the first updating sub-module is used for updating the value of the unacknowledged character counter to be zero under the condition that the value of the unacknowledged character counter is larger than a third threshold.
In some embodiments, the first determining module further comprises:
and the second adjusting sub-module is used for adjusting the confirmed character step length of the outer ring of the modulation coding mode to be larger than the original step length under the condition that the value of the non-confirmed character counter is not larger than a third threshold.
In a third aspect, an embodiment of the present application further provides an electronic device, including a memory, a processor, and a computer program stored on the memory and capable of running on the processor, where the processor implements a fast AMC method based on a large step size as described in any one of the above when executing the program.
In a fourth aspect, embodiments of the present application also provide a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a large step size based fast AMC method as described in any of the above.
In a fifth aspect, embodiments of the present application also provide a computer program product comprising a computer program which, when executed by a processor, implements a large step size based fast AMC method as described in any of the above.
According to the fast AMC method, device and storage medium based on the large step length, whether the ACK step length of the MCS outer loop needs to be adjusted under different conditions can be determined through the outer loop result and the signal-to-noise ratio of the current channel, and for the conditions of discrete scheduling and the MCS rising state, the performance of matching with the channel quality and the convergence speed are improved, so that the system spectrum efficiency is improved.
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In order to more clearly illustrate the embodiments of the present application or the technical solutions in the related art, the drawings that are required to be used in the embodiments or the related technical descriptions will be briefly described, and it is apparent that the drawings in the following descriptions are some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.
Fig. 1 is a schematic flow chart of a large-step-size-based fast Adaptive Modulation and Coding (AMC) method according to an embodiment of the present application;
Fig. 2 is a schematic structural diagram of a fast adaptive modulation and coding AMC device based on a large step size according to an embodiment of the present application;
fig. 3 is a schematic diagram of an entity structure of an electronic device according to an embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Fig. 1 is a flow chart of a fast Adaptive Modulation and Coding (AMC) method based on a large step size according to an embodiment of the present application, as shown in fig. 1, where the embodiment of the present application provides a fast AMC method based on a large step size, including:
Step 101, obtaining an outer loop result and a signal to noise ratio of a current channel, wherein the outer loop result is used for indicating whether a timer of an outer loop of a current modulation coding mode is effective.
Specifically, the AMC process is a process of dynamically selecting an appropriate MCS according to a change in channel conditions, including inner-loop (inner-loop) and outer-loop (outer-loop) processing processes. Typically, the initial MCS of a User Equipment (UE) is equal to the inner-loop MCS plus the initial MCS outer-loop. The MCS of the inner loop is determined by the channel quality of the real-time channel where the UE is located, and the initial MCS outer loop is generally given empirically, and is usually a fixed value. In the actual scheduling process, the following behavior examples are: the UE real-time scheduling MCS is equal to the inner loop MCS plus the MCS outer loop. The inner loop MCS is still determined by the real-time channel quality where the UE is located, and the outer loop refers to that the base station determines the ACK number and NACK number required for the ascending and descending according to the decoding feedback result of the UE to the real scheduling and the target block error rate (Block Error Ratio, BLER) value to update the outer loop value, and the inner loop plus the outer loop value finally determines the scheduling MCS value of the UE, where the purpose of the outer loop is to maintain the actual BLER of the signal transmission near the target BLER.
When a certain outer ring fails, the sample points of the outer ring are considered to be insufficient, and the outer ring needs to be quickly tracked in a large step length at the moment, so that the current channel can be better matched when the outer ring is switched.
When a certain outer loop is not failed and the sample size is sufficient, the mechanism of AMC is a slow-rise and fast-fall mechanism, namely: when the MCS increases the rank, the number of the required ACKs is more, and the rank is increased; when the MCS is reduced, less NACK is required to be reduced by one step, so that whether the current channel is in a rising state or not can be identified and judged, and if the current channel is in the rising state, a large step size is required to be started so as to quickly converge.
Therefore, it can be first determined whether the timer of the MCS outer loop is disabled, an outer loop result is obtained, and the current channel signal-to-noise ratio (Signal to Interference plus Noise Ratio, SINR) is obtained. The channel SINR is obtained by converting CQI values reported by CSI or by reporting SRS reference signals after measurement.
Step 102, based on the result of the outer loop, determining the magnitude relation between the signal-to-noise ratio of the current channel and the first threshold, and adjusting the step length of the confirm character of the outer loop of the modulation coding mode.
Specifically, the first threshold is a channel signal-to-noise ratio threshold, and may be represented by a parameter Thr2 CHANNELSINR. The first threshold is used for judging the sensitivity of the current channel and judging whether the signal to noise ratio of the current channel is suitable for opening a large step length or not.
It should be noted that, before the outer loop result is obtained, the steps of judging the enabling condition and initializing the counter may be further performed in the embodiment of the present application.
The judging enabling condition may include a fast AMC switch for confirming whether to turn on the scheme of the present application, which may be represented by a parameter Swtich, fastAmc, where a parameter set 1 may represent turn-on, a parameter set 0 may represent turn-off, or any other switch representation, which is not limited herein. The decision enabling condition may include that the target BLER configured by the UE is greater than the BLER threshold of fast AMC, which may be represented by parameter BlerThr2 FastAmc.
If the enabling condition is satisfied, after the UE accesses, the following counters may be initialized, which are all UE-level: initializing a large step length identifier to 0, and judging whether the current outer loop of the UE uses a large step length or not; an outer ring scheduling Counter2Sch is initialized to 0, and the Counter is equivalent to a sliding window and is used for counting information such as ACK, NACK number or proportion of the UE in the window; a NACK Counter2Nack is initialized to 0 and is used for counting the number of NACK in the scheduling window; the size window flag BigWindowFlag is initialized to 0. Associated with the outer loop schedule counter for changing the window size of the outer loop schedule counter.
It can then be determined how to adjust the ACK step size of the MCS outer loop by comparing the channel SINR to a first threshold based on the outer loop result.
The fast AMC method based on the large step length provided by the embodiment of the application can determine whether the ACK step length of the MCS outer loop needs to be adjusted under different conditions through the outer loop result and the signal-to-noise ratio of the current channel, and increases the performance of matching with the channel quality and the convergence speed for the conditions of discrete scheduling and the MCS ascending state, thereby improving the system spectrum efficiency.
In some embodiments, the determining the magnitude relation between the signal-to-noise ratio of the current channel and the first threshold and adjusting the confirm character step size of the modulation coding scheme outer loop based on the outer loop result includes:
Under the condition that the outer loop result indicates that the timer of the modulation coding mode outer loop is invalid, determining that the signal to noise ratio of the current channel is not greater than a first threshold;
And adjusting the confirm character step length of the modulation coding mode outer ring to be larger than the original step length.
Specifically, if it is determined that a certain outer loop timer fails and the current channel SINR is less than or equal to the threshold Thr2CHANNELSINR, the current outer loop large step size flag is set to 1, the scheduling counter is restarted, the NACK counter is cleared, and BigWindowFlag is 0.
It should be noted that, in the embodiment of the present application, a certain outer ring refers to: in the conventional AMC system, an outer loop is defined for each transmission mode, and only a current transmission mode is scheduled when scheduling, so that only the outer loop at a certain moment is adjusted, if other outer loops are not scheduled for a long time, the outer loop will fail, and when the outer loop is scheduled, the outer loop will be updated continuously.
Further, in the embodiment of the present application, if the large Step size is identified as 1, the ACK Step size is adjusted to be min (Step 2FastAmcStepUp, thr2 UpStep); the NACK step size remains unchanged. Where Step2FastAmc represents the Step size adjustment factor, stepUp represents the original Step size, and Thr2UpStep represents the Step size upper limit. The step size adjustment factor typically ranges from 1 to 10 and is not 1.
For example, step2FastAmc is 2, if a certain outer loop timer expires and the current channel SINR is less than or equal to the threshold Thr2CHANNELSINR, the method is performed according to min (Step 2FastAmcStepUp, thr2 UpStep) to adjust the ACK step size to a2 times the original step size.
For another example, if Step2FastAmc is 4, if a certain outer-loop timer is disabled and the current channel SINR is less than or equal to the threshold Thr2CHANNELSINR, the method is performed according to min (Step 2FastAmcStepUp, thr2 UpStep) to adjust the ACK step size to 4 times the original step size.
After step updating, judging and maintaining the large step mark again for the next step updating.
Further, the failure outer loop only judges the channel SINR, but does not judge other thresholds, and the reason is two, namely that the failure outer loop does not currently schedule and does not have the scheduling information; the second large step is mainly aimed at the step of the ACK, so when the invalid outer ring is rescheduled, if NACK is fed back, the step is not changed, if the ACK is fed back, the step is updated with the large step, and the system is not negatively affected.
The rapid AMC method based on the large step length provided by the embodiment of the application can increase proper expansion processing of the outer ring step length according to the judgment of the current scheduling condition, improve the AMC convergence speed and improve the system spectrum efficiency.
In some embodiments, the determining the magnitude relation between the signal-to-noise ratio of the current channel and the first threshold and adjusting the confirm character step size of the modulation coding scheme outer loop based on the outer loop result includes:
under the condition that the outer loop result indicates that the timer of the modulation coding mode outer loop is invalid, determining that the signal to noise ratio of the current channel is larger than a first threshold;
And determining the step length of the confirmed character of the outer ring of the modulation coding mode as the original step length.
Specifically, if it is determined that a certain outer loop timer fails and the current channel SINR is greater than the threshold Thr2CHANNELSINR, the current outer loop large step size flag is set to 0, the scheduling counter is restarted, the NACK counter is cleared, and BigWindowFlag =0. The ACK step size of the current MCS outer loop uses a default step size, i.e., the original step size, when the large step size flag is 0.
The rapid AMC method based on the large step length increases maintenance of the large step length mark in the processing process of the traditional AMC, and improves performance of matching with channel quality and convergence speed for the conditions of discrete scheduling and MCS rising state.
In some embodiments, the determining the magnitude relation between the signal-to-noise ratio of the current channel and the first threshold and adjusting the confirm character step size of the modulation coding scheme outer loop based on the outer loop result includes:
acquiring a feedback result under the condition that the outer ring result indicates that the timer of the modulation coding mode outer ring is effective;
determining that the signal to noise ratio of the current channel is not greater than a first threshold;
And determining the size relation between the value of the unacknowledged character counter and a second threshold, wherein the value of the unacknowledged character counter is determined based on a feedback result, and the second threshold is used for determining whether the outer loop of the current modulation coding mode is in a convergence state or not.
Specifically, in the case that the timer of the MCS outer loop is valid, the magnitude relation of the channel SINR to the first threshold is also compared every time the feedback result is received. If the channel SINR is greater than the first threshold, the large step size flag is set to 0, the current outer loop scheduling counter is restarted by using the default step size, and the NACK counter is cleared BigWindowFlag to 0. And re-executing the step of comparing the magnitude relation between the channel SINR and the first threshold after the next feedback.
If the channel SINR is not greater than the first threshold, judging whether the current outer loop NACK counter is greater than the second threshold, wherein the second threshold is used for judging whether the current MCS outer loop is in a convergence state, and when the NACK number is more, the target BLER is possibly reached at the moment, namely the convergence state is reached. The second threshold may be represented by a parameter Thr2 NACKHigh.
The rapid AMC method based on the large step length provided by the embodiment of the application ensures that the outer ring value can timely follow the channel change when in discrete scheduling and in an ascending state, and better matches the current channel condition, thereby accelerating the convergence speed of MCS and improving the frequency spectrum efficiency of the system.
In some embodiments, the method further comprises:
and under the condition that the value of the unacknowledged character counter is larger than a second threshold, determining the step length of the acknowledged character of the outer ring of the modulation coding mode as the original step length.
Specifically, when the NACK counter of the current outer ring is greater than the second threshold, the large step size flag is set to 0, and the scheduling counter of the current outer ring is restarted with a default step size, and the NACK counter is cleared BigWindowFlag to 1.
The rapid AMC method based on the large step length provided by the embodiment of the application ensures that the outer ring value can timely follow the channel change when in discrete scheduling and in an ascending state, and better matches the current channel condition, thereby accelerating the convergence speed of MCS and improving the frequency spectrum efficiency of the system.
In some embodiments, the method further comprises:
and under the condition that the value of the non-acknowledgement character counter is not greater than a second threshold, determining the size relation between the value of the non-acknowledgement character counter and a third threshold, wherein the third threshold is used for determining whether the outer loop of the current modulation coding mode is in a rising state or not.
Specifically, if the NACK counter of the current outer loop is not greater than the second threshold, it is determined whether the current outer loop satisfies the following condition: (BigWindowFlag =1 & schedule counter greater than threshold Thr2 SchH)/(BigWindowFlag =0 & schedule counter greater than threshold Thr2 SchL). Wherein Thr2SchH is a first threshold for scheduling count, thr2SchL is a second threshold for scheduling count, and the first threshold for scheduling count is greater than the second threshold for scheduling count.
If the condition is met, the size relation between the current outer ring NACK counter and a third threshold is judged, the third threshold is used for judging whether the current outer ring NACK counter is in an ascending state, and when the NACK number is small, the current outer ring NACK counter is characterized as being in a continuous ACK or when the number of the ACK is large, the current outer ring NACK counter is characterized as being in the ascending state. The third threshold may be represented by a parameter Thr2 NACKLow.
And if the condition is not met, re-executing the step of comparing the magnitude relation between the channel SINR and the first threshold after the next feedback.
The rapid AMC method based on the large step length provided by the embodiment of the application ensures that the outer ring value can timely follow the channel change when in discrete scheduling and in an ascending state, and better matches the current channel condition, thereby accelerating the convergence speed of MCS and improving the frequency spectrum efficiency of the system.
In some embodiments, the method further comprises:
and updating the value of the unacknowledged character counter to be zero in the case that the value of the unacknowledged character counter is larger than a third threshold.
Specifically, when the NACK counter of the current outer ring is greater than the third threshold, the current outer ring is forward supplemented with a signal-to-noise ratio increment, which may be represented by a parameter Boost2Sinr, a large step size flag is set to 1, the current outer ring scheduling counter is restarted, and the NACK counter is cleared BigWindowFlag to 0.
The rapid AMC method based on the large step length provided by the embodiment of the application can increase proper expansion processing of the outer ring step length according to the judgment of the current scheduling condition, improve the AMC convergence speed and improve the system spectrum efficiency.
In some embodiments, the method further comprises:
And under the condition that the value of the unacknowledged character counter is not larger than a third threshold, adjusting the step length of the acknowledged character of the outer ring of the modulation coding mode to be larger than the original step length.
Specifically, under the condition that the current outer loop NACK counter is not greater than a third threshold, restarting the current outer loop scheduling counter, and resetting the NACK counter.
The fast AMC method based on the large step length provided by the embodiment of the application can determine whether the ACK step length of the MCS outer loop needs to be adjusted under different conditions through the outer loop result and the signal-to-noise ratio of the current channel, and increases the performance of matching with the channel quality and the convergence speed for the conditions of discrete scheduling and the MCS ascending state, thereby improving the system spectrum efficiency.
The method in the above embodiment will be further described below with specific examples.
Example one:
In the embodiment of the present application, the second threshold of the corresponding scheduling count is 35 when BigWindowFlag is 0, and the first threshold of the corresponding scheduling count is 60 when bigwindowflag is 1.
Step one: and judging an enabling condition.
1) Judging whether the enabling condition of the method is met or not:
1. fast AMC switch Swtich, fastAmc is 1, switch enabled.
2. The UE configures a target BLER of 10% greater than the fast AMC BLER threshold BlerThr, fastAmc.
Step two: a counter is initialized.
1) If the enabling condition is met, after the UE is accessed, initializing the following parameter counters, which are all at the UE level:
1. the large step size identifier is initialized to 0 and is used for judging whether the current outer loop of the UE uses a large step size.
2. The outer loop scheduling Counter2Sch is initialized to 0, and the Counter is equivalent to a window length and is used for counting the information such as ACK, NACK number or proportion of the UE in the window.
3. A NACK Counter2NACK is initialized to 0 for counting the number of NACKs within the scheduling window.
4. The size window flag BigWindowFlag is initialized to 0.
Step three: and maintaining the AMC large step length mark.
Whether the outer loop fails or not, the fast AMC enable Flag needs to be maintained according to the current channel condition and other factors so as to judge whether the fast AMC is started or not later.
1) Maintaining the large step length mark of the current failure outer ring:
1. Judging that a certain outer loop timer fails, and the current channel SINR is: 15dB, satisfying the threshold Thr2CHANNELSINR or less, the current outer loop large step size flag is set to 1, the scheduling counter is restarted, the NACK counter is cleared, bigWindowFlag =0.
2) Maintaining the effective large step mark of the outer ring:
1. whenever ACK or NACK feedback is received, the current channel SINR is: 15dB, satisfying the threshold Thr2CHNNELSINR or less, the following steps are executed.
2. The current outer loop NACK counter is: 0, less than threshold Thr2NACKHigh, the following steps are performed.
3. The current outer loop: (BigWindowFlag =1 & schedule counter 36, less than threshold Thr2 SchH)/(BigWindowFlag =0 & schedule counter 36, greater than threshold Thr2 SchL), satisfies the conditions, and performs the following steps.
It should be noted that the step schedule counter is exemplified to 36 in the present example to illustrate the method steps, and the previous 35 counts are not exemplified, and the iterative process is looped from 1 to the present step, as shown in table 1.
Table 1 feedback results of example 1
4. The current outer loop NACK counter is 0, less than or equal to the threshold Thr2NACKLow, and the following steps are performed.
5. The current outer loop is positively supplemented with Boost2Sinr, a large step size flag is set to 1, the current outer loop scheduling counter is restarted, the NACK counter is cleared, bigWindowFlag =0.
Step four: large step flow.
1) When ACK/NACK feedback is received, updating the outer ring step length according to the current large step length identification value, and adjusting the step length specifically as shown in a table 2.
Table 2, step length adjustment results of example one
2) In the embodiment of the application, the previous 35 times of scheduling counters do not reach the threshold, so that the large step length identifiers are all initial values of 0, the 36 th time is reached, after the ACK/NACK feedback is received, the outer ring step length is updated by the current large step length identifier=0, and then the judgment in the step 3 is performed, and the large step length identifier of the 36 th time of scheduling is updated.
3) The 36 th scheduling step is updated with the normal step first, and then the step 3 judges that the update large step is marked as 1.
4) And (3) carrying out scheduling for the 37 th time, when receiving the ACK/NACK feedback, firstly carrying out outer loop Step length update according to the current large Step length identification=1, and adjusting the ACK Step length to Min (Step 2FastAmcStepUp, thr2 UpStep); the NACK step size remains unchanged. And then, judging and updating the large step length identification of the 37 th scheduling.
5) The outer loop adjustment specific method and mechanism is consistent with conventional AMC.
Example two:
In the embodiment of the present application, the second threshold of the corresponding scheduling count is 35 when BigWindowFlag is 0, and the first threshold of the corresponding scheduling count is 60 when bigwindowflag is 1.
Step one: and judging an enabling condition.
1) Judging whether the enabling condition of the method is met or not:
1. fast AMC switch Swtich, fastAmc is 1, switch enabled.
2. The UE configures a target BLER of 10% greater than the fast AMC BLER threshold BlerThr, fastAmc.
Step two: a counter is initialized.
1) If the enabling condition is met, after the UE is accessed, initializing the following parameter counters, which are all at the UE level:
1. the large step size identifier is initialized to 0 and is used for judging whether the current outer loop of the UE uses a large step size.
2. The outer loop scheduling Counter2Sch is initialized to 0, and the Counter is equivalent to a window length and is used for counting the information such as ACK, NACK number or proportion of the UE in the window.
3. A NACK Counter2NACK is initialized to 0 for counting the number of NACKs within the scheduling window.
4. The size window flag BigWindowFlag is initialized to 0.
Step three: and maintaining the AMC large step length mark.
Whether the outer loop fails or not, the fast AMC enable Flag needs to be maintained according to the current channel condition and other factors so as to judge whether the fast AMC is started or not later.
1) Maintaining the large step length mark of the current failure outer ring:
1. Judging that a certain outer loop timer fails, and the current channel SINR is: 16dB, satisfying the threshold Thr2CHANNELSINR or less, the current outer loop large step size flag is set to 1, the scheduling counter is restarted, the NACK counter is cleared, bigWindowFlag =0.
2) Maintaining the effective large step mark of the outer ring:
1. Whenever ACK or NACK feedback is received, the current channel SINR is: 16dB, satisfying the threshold Thr2CHNNELSINR or less, the following steps are executed.
2. The current outer loop NACK counter is: 2, less than the threshold Thr2NACKHigh, the following steps are performed.
3. The current outer loop: (BigWindowFlag =1 & schedule counter 36, less than threshold Thr2 SchH)/(BigWindowFlag =0 & schedule counter 36, greater than threshold Thr2 SchL), satisfies the conditions, and performs the following steps.
It should be noted that the step schedule counter is exemplified to 36 in the present example to illustrate the method steps, and the previous 35 counts are not exemplified, and the iterative process is looped from 1 to the present step, as shown in table 3.
Table 3 feedback results for example two
4. The current outer loop NACK counter is 2, greater than the threshold Thr2NACKLow, the following steps are performed.
5. The large step length mark is set to 0, and the scheduling counter is restarted; the NACK counter is cleared BigWindowFlag =0. And restarting judging from the step 1 of the step three) after the ACK/NACK feedback is received next time.
Step four: large step flow.
1) In the embodiment of the application, the large step mark of the effective outer ring judgment is 0, so that the case of outer ring tracking when the outer ring is invalid is only exemplified in the large step flow.
2) When the outer ring corresponding to the failed transmission mode is rescheduled, after the ACK/NACK feedback is received, the outer ring step length is updated according to the current large step length identification value.
3) In the embodiment of the application, the invalid outer ring is not provided with a threshold of a dispatching counter, the large step length mark is judged for the invalid outer ring, and the large step length mark of the invalid outer ring is 1 when the 35 th dispatching is carried out.
4) Therefore, the 36 th scheduling step is updated with a large step first, and then the third step judges the current scheduling (36 th scheduling) and updates the large step identifier.
5) And 36 th scheduling, when receiving the ACK/NACK feedback, firstly updating the outer ring Step according to the current large Step identification=1, and adjusting the ACK Step to Min (Step 2FastAmcStepUp, thr2 UpStep); the NACK step size remains unchanged. (Step 2FastAmc represents the Step size adjustment factor; stepUp represents the original Step size; thr2UpStep represents the Step size upper limit). And then, judging and updating the large step length identification of 36 th scheduling.
6) The outer loop adjustment specific method and mechanism is consistent with conventional AMC.
Example three:
In the embodiment of the present application, the second threshold of the corresponding scheduling count is 35 when BigWindowFlag is 0, and the first threshold of the corresponding scheduling count is 60 when bigwindowflag is 1.
Step one: and judging an enabling condition.
1) Judging whether the enabling condition of the method is met or not:
1. fast AMC switch Swtich, fastAmc is 1, switch enabled.
2. The UE configures a target BLER of 10% greater than the fast AMC BLER threshold BlerThr, fastAmc.
Step two: a counter is initialized.
1) If the enabling condition is met, after the UE is accessed, initializing the following parameter counters, which are all at the UE level:
1. the large step size identifier is initialized to 0 and is used for judging whether the current outer loop of the UE uses a large step size.
2. The outer loop scheduling Counter2Sch is initialized to 0, and the Counter is equivalent to a window length and is used for counting the information such as ACK, NACK number or proportion of the UE in the window.
3. A NACK Counter2NACK is initialized to 0 for counting the number of NACKs within the scheduling window.
4. The size window flag BigWindowFlag is initialized to 0.
Step three: and maintaining the AMC large step length mark.
Whether the outer loop fails or not, the fast AMC enable Flag needs to be maintained according to the current channel condition and other factors so as to judge whether the fast AMC is started or not later.
1) Maintaining the large step length mark of the current failure outer ring:
1. Judging that a certain outer loop timer fails, and the current channel SINR is: 15dB, satisfying the threshold Thr2CHANNELSINR or less, the current outer loop large step size flag is set to 1, the scheduling counter is restarted, the NACK counter is cleared, bigWindowFlag =0.
2) Maintaining the effective large step mark of the outer ring:
1. Whenever ACK/NACK feedback is received, the current channel SINR is: 15dB, satisfying the threshold Thr2CHNNELSINR or less, the following steps are executed.
2. The current outer loop NACK counter is: 5, greater than a threshold Thr2NACKHigh, the following steps are performed. Assuming that the first 31 times are ACKs and the next 5 times are received NACKs, the present decision is the 36 th scheduling decision, so the outer-loop NACK counter is 5, as shown in table 4.
Table 4 feedback results of example three
3. The large step size flag is set to 0, the scheduling counter of the current outer loop is restarted with the default step size, the NACK counter is cleared, bigWindowFlag =1. The judgment is resumed from 1.
Step four: large step flow.
1) In this example, the large step size of the valid outer loop judgment is marked as 0, so that the case of outer loop tracking when the outer loop fails in scheduling is only exemplified in the large step size flow.
2) When the outer ring corresponding to the failed transmission mode is rescheduled, after the ACK/NACK feedback is received, updating the step length of the outer ring according to the current value of the large step length mark, wherein the step length adjustment is specifically as follows:
3) In this example, the failed outer ring has no threshold setting of the scheduling counter, and the large step identifier is determined for the failed outer ring, and the large step identifier of the failed outer ring is 1 when the 35 th scheduling is performed.
4) Therefore, the 36 th scheduling step is updated with a large step first, and then the step 3 judges the current scheduling (36 th scheduling) and updates the large step identifier.
5) And 36 th scheduling, when receiving the ACK/NACK feedback, firstly updating the outer ring Step according to the current large Step identification=1, and adjusting the ACK Step to Min (Step 2FastAmcStepUp, thr2 UpStep); the NACK step size remains unchanged. (Step 2FastAmc represents the Step size adjustment factor; stepUp represents the original Step size; thr2UpStep represents the Step size upper limit). And then, judging and updating the large step length identification of 36 th scheduling.
6) The outer loop adjustment specific method and mechanism is consistent with conventional AMC.
The fast AMC method based on the large step length provided by the embodiment of the application can determine whether the ACK step length of the MCS outer loop needs to be adjusted under different conditions through the outer loop result and the signal-to-noise ratio of the current channel, and increases the performance of matching with the channel quality and the convergence speed for the conditions of discrete scheduling and the MCS ascending state, thereby improving the system spectrum efficiency.
Fig. 2 is a schematic structural diagram of a fast adaptive modulation and coding device based on a large step size according to an embodiment of the present application, and as shown in fig. 2, the fast AMC device based on a large step size according to an embodiment of the present application includes a first obtaining module 201, a first determining module 202, where:
a first obtaining module 201, configured to obtain an outer loop result and a signal-to-noise ratio of a current channel, where the outer loop result is used to indicate whether a timer of an outer loop of a current modulation coding mode is valid;
A first determining module 202, configured to determine a magnitude relation between a signal-to-noise ratio of the current channel and a first threshold based on the outer loop result, and adjust a confirm character step size of the outer loop of the modulation coding scheme.
In some embodiments, the first determining module comprises:
a first determining submodule, configured to determine that a signal-to-noise ratio of the current channel is not greater than a first threshold when the outer loop result indicates that a timer of an outer loop of a modulation coding scheme fails;
And the first adjusting sub-module is used for adjusting the step length of the confirmed character of the outer ring of the modulation coding mode to be longer than the original step length.
In some embodiments, the first determining module comprises:
a second determining submodule, configured to determine that a signal-to-noise ratio of the current channel is greater than a first threshold when the outer loop result indicates that a timer of the modulation coding scheme outer loop fails;
And the third determination submodule is used for determining the step length of the confirmed character of the outer ring of the modulation coding mode as the original step length.
In some embodiments, the first determining module comprises:
The first acquisition submodule is used for acquiring a feedback result when the outer ring result indicates that the timer of the modulation coding mode outer ring is effective;
A third determining submodule, configured to determine that a signal-to-noise ratio of the current channel is not greater than a first threshold;
And a fourth determining submodule, configured to determine a magnitude relation between a value of a non-acknowledgement character counter and a second threshold, where the value of the non-acknowledgement character counter is determined based on a feedback result, and the second threshold is used to determine whether the outer loop of the current modulation coding mode is in a convergence state.
In some embodiments, the first determining module further comprises:
and a fifth determining submodule, configured to determine that the step length of the confirmed character of the outer ring of the modulation coding mode is an original step length when the value of the unacknowledged character counter is greater than the second threshold.
In some embodiments, the first determining module further comprises:
and the sixth determining submodule is used for determining the size relation between the value of the non-acknowledgement character counter and a third threshold under the condition that the value of the non-acknowledgement character counter is not larger than the second threshold, and the third threshold is used for determining whether the outer loop of the current modulation coding mode is in a rising state or not.
In some embodiments, the first determining module further comprises:
and the first updating sub-module is used for updating the value of the unacknowledged character counter to be zero under the condition that the value of the unacknowledged character counter is larger than a third threshold.
In some embodiments, the first determining module further comprises:
and the second adjusting sub-module is used for adjusting the confirmed character step length of the outer ring of the modulation coding mode to be larger than the original step length under the condition that the value of the non-confirmed character counter is not larger than a third threshold.
Specifically, the large-step-size-based fast AMC device provided by the embodiment of the present application can implement all the method steps implemented by the large-step-size-based fast AMC method embodiment, and can achieve the same technical effects, and the same parts and beneficial effects as those of the method embodiment in the embodiment are not specifically described herein.
Fig. 3 is a schematic physical structure of an electronic device according to an embodiment of the present application, where, as shown in fig. 3, the electronic device may include: processor 310, communication interface (Communications Interface) 320, memory 330 and communication bus 340, wherein processor 310, communication interface 320 and memory 330 communicate with each other via communication bus 340. Processor 310 may invoke logic instructions in memory 330 to perform a large-stride based fast AMC method that includes:
acquiring an outer loop result and a signal to noise ratio of a current channel, wherein the outer loop result is used for indicating whether a timer of an outer loop of a current modulation coding mode is effective or not;
And based on the outer loop result, determining the magnitude relation between the signal-to-noise ratio of the current channel and a first threshold, and adjusting the step length of the confirming character of the outer loop of the modulation coding mode.
Further, the logic instructions in the memory 330 described above may be implemented in the form of software functional units and may be stored in a computer-readable storage medium when sold or used as a stand-alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In some embodiments, the determining the magnitude relation between the signal-to-noise ratio of the current channel and the first threshold and adjusting the confirm character step size of the modulation coding scheme outer loop based on the outer loop result includes:
Under the condition that the outer loop result indicates that the timer of the modulation coding mode outer loop is invalid, determining that the signal to noise ratio of the current channel is not greater than a first threshold;
And adjusting the confirm character step length of the modulation coding mode outer ring to be larger than the original step length.
In some embodiments, the determining the magnitude relation between the signal-to-noise ratio of the current channel and the first threshold and adjusting the confirm character step size of the modulation coding scheme outer loop based on the outer loop result includes:
under the condition that the outer loop result indicates that the timer of the modulation coding mode outer loop is invalid, determining that the signal to noise ratio of the current channel is larger than a first threshold;
And determining the step length of the confirmed character of the outer ring of the modulation coding mode as the original step length.
In some embodiments, the determining the magnitude relation between the signal-to-noise ratio of the current channel and the first threshold and adjusting the confirm character step size of the modulation coding scheme outer loop based on the outer loop result includes:
acquiring a feedback result under the condition that the outer ring result indicates that the timer of the modulation coding mode outer ring is effective;
determining that the signal to noise ratio of the current channel is not greater than a first threshold;
And determining the size relation between the value of the unacknowledged character counter and a second threshold, wherein the value of the unacknowledged character counter is determined based on a feedback result, and the second threshold is used for determining whether the outer loop of the current modulation coding mode is in a convergence state or not.
In some embodiments, the method further comprises:
and under the condition that the value of the unacknowledged character counter is larger than a second threshold, determining the step length of the acknowledged character of the outer ring of the modulation coding mode as the original step length.
In some embodiments, the method further comprises:
and under the condition that the value of the non-acknowledgement character counter is not greater than a second threshold, determining the size relation between the value of the non-acknowledgement character counter and a third threshold, wherein the third threshold is used for determining whether the outer loop of the current modulation coding mode is in a rising state or not.
In some embodiments, the method further comprises:
and updating the value of the unacknowledged character counter to be zero in the case that the value of the unacknowledged character counter is larger than a third threshold.
In some embodiments, the method further comprises:
And under the condition that the value of the unacknowledged character counter is not larger than a third threshold, adjusting the step length of the acknowledged character of the outer ring of the modulation coding mode to be larger than the original step length.
Specifically, the electronic device provided by the embodiment of the present application can implement all the method steps implemented by the method embodiment in which the execution subject is the electronic device, and can achieve the same technical effects, and the same parts and beneficial effects as those of the method embodiment in the embodiment are not described in detail herein.
In another aspect, the present invention also provides a computer program product, the computer program product comprising a computer program, the computer program being storable on a non-transitory computer readable storage medium, the computer program, when executed by a processor, being capable of performing the large-step-based fast AMC method provided by the above methods, the method comprising:
acquiring an outer loop result and a signal to noise ratio of a current channel, wherein the outer loop result is used for indicating whether a timer of an outer loop of a current modulation coding mode is effective or not;
And based on the outer loop result, determining the magnitude relation between the signal-to-noise ratio of the current channel and a first threshold, and adjusting the step length of the confirming character of the outer loop of the modulation coding mode.
In yet another aspect, the present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, is implemented to perform the large-step-size based fast AMC method provided by the above methods, the method comprising:
acquiring an outer loop result and a signal to noise ratio of a current channel, wherein the outer loop result is used for indicating whether a timer of an outer loop of a current modulation coding mode is effective or not;
And based on the outer loop result, determining the magnitude relation between the signal-to-noise ratio of the current channel and a first threshold, and adjusting the step length of the confirming character of the outer loop of the modulation coding mode.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
In addition, it should be noted that: the terms "first," "second," and the like in embodiments of the present application are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or otherwise described herein, and that the "first" and "second" distinguishing between objects generally are not limited in number to the extent that the first object may, for example, be one or more.
In the embodiment of the application, the term "and/or" describes the association relation of the association objects, which means that three relations can exist, for example, a and/or B can be expressed as follows: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.
The term "plurality" in embodiments of the present application means two or more, and other adjectives are similar.
The term "determining B based on a" in the present application means that a is a factor to be considered in determining B. Not limited to "B can be determined based on A alone", it should also include: "B based on A and C", "B based on A, C and E", "C based on A, further B based on C", etc. Additionally, a may be included as a condition for determining B, for example, "when a satisfies a first condition, B is determined using a first method"; for another example, "when a satisfies the second condition, B" is determined, etc.; for another example, "when a satisfies the third condition, B" is determined based on the first parameter, and the like. Of course, a may be a condition in which a is a factor for determining B, for example, "when a satisfies the first condition, C is determined using the first method, and B is further determined based on C", or the like.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The fast adaptive modulation and coding technology AMC method based on the large step length is characterized by comprising the following steps:
acquiring an outer loop result and a signal to noise ratio of a current channel, wherein the outer loop result is used for indicating whether a timer of an outer loop of a current modulation coding mode is effective or not;
And based on the outer loop result, determining the magnitude relation between the signal-to-noise ratio of the current channel and a first threshold, and adjusting the step length of the confirming character of the outer loop of the modulation coding mode.
2. The large-step-size-based fast adaptive modulation and coding technique AMC method of claim 1, wherein determining the magnitude relation between the signal-to-noise ratio of the current channel and the first threshold and adjusting the acknowledgment character step size of the modulation coding scheme outer loop based on the outer loop result comprises:
Under the condition that the outer loop result indicates that the timer of the modulation coding mode outer loop is invalid, determining that the signal to noise ratio of the current channel is not greater than a first threshold;
And adjusting the confirm character step length of the modulation coding mode outer ring to be larger than the original step length.
3. The large-step-size-based fast adaptive modulation and coding technique AMC method of claim 1, wherein determining the magnitude relation between the signal-to-noise ratio of the current channel and the first threshold and adjusting the acknowledgment character step size of the modulation coding scheme outer loop based on the outer loop result comprises:
under the condition that the outer loop result indicates that the timer of the modulation coding mode outer loop is invalid, determining that the signal to noise ratio of the current channel is larger than a first threshold;
And determining the step length of the confirmed character of the outer ring of the modulation coding mode as the original step length.
4. The large-step-size-based fast adaptive modulation and coding technique AMC method of claim 1, wherein determining the magnitude relation between the signal-to-noise ratio of the current channel and the first threshold and adjusting the acknowledgment character step size of the modulation coding scheme outer loop based on the outer loop result comprises:
acquiring a feedback result under the condition that the outer ring result indicates that the timer of the modulation coding mode outer ring is effective;
determining that the signal to noise ratio of the current channel is not greater than a first threshold;
And determining the size relation between the value of the unacknowledged character counter and a second threshold, wherein the value of the unacknowledged character counter is determined based on a feedback result, and the second threshold is used for determining whether the outer loop of the current modulation coding mode is in a convergence state or not.
5. The large-step-based fast adaptive modulation and coding technique AMC method of claim 4, further comprising:
and under the condition that the value of the unacknowledged character counter is larger than a second threshold, determining the step length of the acknowledged character of the outer ring of the modulation coding mode as the original step length.
6. The large-step-based fast adaptive modulation and coding technique AMC method of claim 4, further comprising:
and under the condition that the value of the non-acknowledgement character counter is not greater than a second threshold, determining the size relation between the value of the non-acknowledgement character counter and a third threshold, wherein the third threshold is used for determining whether the outer loop of the current modulation coding mode is in a rising state or not.
7. The large-step-based fast adaptive modulation and coding technique AMC method of claim 6, further comprising:
and updating the value of the unacknowledged character counter to be zero in the case that the value of the unacknowledged character counter is larger than a third threshold.
8. The large-step-based fast adaptive modulation and coding technique AMC method of claim 6, further comprising:
And under the condition that the value of the unacknowledged character counter is not larger than a third threshold, adjusting the step length of the acknowledged character of the outer ring of the modulation coding mode to be larger than the original step length.
9. A fast Adaptive Modulation and Coding (AMC) device based on a large step size, comprising:
The first acquisition module is used for acquiring an outer loop result and a signal to noise ratio of a current channel, wherein the outer loop result is used for indicating whether a timer of an outer loop of a current modulation coding mode is effective or not;
And the first determining module is used for determining the magnitude relation between the signal-to-noise ratio of the current channel and the first threshold based on the outer loop result and adjusting the step length of the confirmed character of the outer loop of the modulation coding mode.
10. A non-transitory computer readable storage medium, on which a computer program is stored, which when executed by a processor implements the fast adaptive modulation and coding technique AMC method based on large step sizes according to any one of claims 1-8.
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| CN112235871A (en) * | 2020-09-24 | 2021-01-15 | 杭州红岭通信息科技有限公司 | Scheduling method of multi-input multi-output system |
| CA3137641A1 (en) * | 2020-11-04 | 2022-05-04 | Meteorcomm, Llc | Adaptive coding, modulation, and power control for positive train control systems |
| WO2023001160A1 (en) * | 2021-07-23 | 2023-01-26 | 中兴通讯股份有限公司 | Adaptive modulation and coding method and apparatus, electronic device, and storage medium |
| CN114222328A (en) * | 2021-12-30 | 2022-03-22 | 赛特斯信息科技股份有限公司 | Wireless link self-adaption method |
| CN117294385A (en) * | 2022-06-16 | 2023-12-26 | 中兴通讯股份有限公司 | Adaptive modulation and coding method, device, base station and storage medium |
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