CN108023676B - Modulation mode control method, device and base station - Google Patents
Modulation mode control method, device and base station Download PDFInfo
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- CN108023676B CN108023676B CN201610978948.3A CN201610978948A CN108023676B CN 108023676 B CN108023676 B CN 108023676B CN 201610978948 A CN201610978948 A CN 201610978948A CN 108023676 B CN108023676 B CN 108023676B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
- H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
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Abstract
The invention provides a modulation mode control method, a device and a base station, which are characterized in that a current channel quality parameter of a downlink channel of a terminal is obtained, a modulation mode which is currently adapted to the downlink channel of the terminal is selected from a first modulation mode and a second modulation mode according to the channel quality parameter, and the terminal is controlled to communicate by using the selected modulation mode, so that the terminal can dynamically select a proper modulation mode to carry out data communication according to the quality condition of the downlink channel and can carry out adjustment according to the channel condition of the terminal in real time, the utilization rate of the bandwidth of the downlink channel and the fairness of resource allocation are greatly improved, the smoothness of downlink channel data transmission at a lower modulation order is ensured, and the requirement of the downlink channel data transmission on a higher modulation order is met.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a modulation scheme control method, apparatus, and base station.
Background
Currently, for a physical downlink channel of an LTE (Long Term Evolution) system, a general strategy for selecting a modulation and coding scheme is as follows: the better the channel quality condition of a UE (User Equipment), the higher the Modulation and Coding Scheme allocated to the UE, i.e. the larger the MCS (Modulation and Coding Scheme) index value; on the contrary, the worse the channel quality condition of the UE is, the lower the modulation and coding scheme allocated to the UE is, that is, the smaller the MCS index value is, and by the allocation strategy, the resources of the physical downlink channel of the LTE system can be maximally utilized, taking into account the downlink scheduling requirements of the near point UE and the far point UE. However, in the prior art, for a downlink channel of an LET system, there are usually at least two modulation modes for selection, and in different modulation modes, the maximum modulation order is often different, and the selectable MCSs corresponding to the low modulation order and the high modulation order are also different. For example, the modulation schemes that can be selected by the system include a 16QAM modulation scheme and a 256QAM modulation scheme, if the 256QAM modulation scheme is fixedly selected by the system, the MCS that can be selected is too small when the modulation order is lower, which results in insufficient smoothness of the distant UE, if the 16QAM is fixedly selected by the system, and the throughput of the UE cannot meet the requirement when the modulation order is higher, and the 256QAM also can be assumed, so that the appropriate modulation scheme is dynamically selected to fully and fairly utilize the downlink channel resources, and at the same time, the requirement of the downlink channel for high data transmission is met, and the better smoothness of the transmitted data becomes an important problem to be solved.
Disclosure of Invention
The embodiment of the invention provides a modulation mode control method, a modulation mode control device and a base station, and mainly solves the technical problems that: in the existing communication system, the modulation mode selected by the downlink channel of the terminal is fixed, and a proper modulation mode cannot be dynamically selected, so that the utilization rate of the bandwidth of the downlink channel is low, and the resource allocation is not fair.
To solve the foregoing technical problem, an embodiment of the present invention provides a modulation scheme control method, including:
acquiring a current channel quality parameter of a downlink channel of a terminal;
selecting a modulation mode currently adapted to a downlink channel of the terminal from a first modulation mode and a second modulation mode according to the channel quality parameter, wherein the maximum modulation order of the second modulation mode is larger than that of the first modulation mode;
and the control terminal uses the selected modulation mode to carry out communication.
An embodiment of the present invention further provides a modulation scheme control apparatus, including:
a channel quality parameter obtaining module, configured to obtain a current channel quality parameter of a downlink channel of a terminal;
the modulation mode selection module is used for selecting a modulation mode currently adaptive to a downlink channel of the terminal from a first modulation mode and a second modulation mode according to the channel quality parameter, wherein the maximum modulation order of the second modulation mode is greater than that of the first modulation mode;
and the processing module is used for controlling the terminal to communicate by using the selected modulation mode.
The embodiment of the invention also provides a base station which comprises the modulation mode control device.
The embodiment of the invention also provides a computer storage medium, wherein a computer executable instruction is stored in the computer storage medium, and the computer executable instruction is used for executing the modulation mode control method.
The invention has the beneficial effects that:
according to the modulation mode control method, the modulation mode control device, the base station and the computer storage medium provided by the embodiment of the invention, the current channel quality parameter of the downlink channel of the terminal is obtained, the modulation mode which is currently adaptive to the downlink channel of the terminal is selected from the first modulation mode and the second modulation mode according to the channel quality parameter, and the terminal is controlled to communicate by using the selected modulation mode, so that the terminal can dynamically select the appropriate modulation mode to carry out data communication according to the quality condition of the downlink channel, and can carry out adjustment in real time according to the channel condition of the terminal, the utilization rate of the bandwidth of the downlink channel and the fairness of resource allocation are greatly improved, the smoothness of downlink channel data transmission when the modulation order is lower is ensured, and the requirement of the downlink channel data transmission on the higher modulation order is met.
Drawings
Fig. 1 is a schematic flow chart illustrating a modulation scheme control method according to a first embodiment of the present invention;
fig. 2 is a first flowchart illustrating a modulation scheme control method according to a second embodiment of the present invention;
fig. 3 is a second flowchart illustrating a modulation scheme control method according to a second embodiment of the present invention;
fig. 4 is a schematic flow chart of a modulation scheme control method according to a second embodiment of the present invention;
fig. 5 is a schematic diagram illustrating switching between two modulation modes according to a second embodiment of the present invention;
fig. 6 is a schematic structural diagram of a modulation scheme control apparatus according to a third embodiment of the present invention;
fig. 7 is a schematic structural diagram of a base station in the third embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
The first embodiment is as follows:
in order to ensure smoothness of downlink channel data transmission when the modulation order is lower and meet the requirement of downlink channel data transmission for a higher modulation order, the present embodiment provides a modulation scheme control method, as shown in fig. 1, including:
s101: and acquiring the current channel quality parameter of the downlink channel of the terminal.
S102: selecting a modulation mode currently adapted to a downlink channel of the terminal from a first modulation mode and a second modulation mode according to the channel quality parameter;
the maximum modulation order of the second modulation mode is larger than that of the first modulation mode.
Of course, if the capability level information reported by the terminal includes the content supporting the second modulation scheme, the second modulation scheme may be directly selected as the modulation scheme currently adapted to the downlink channel of the terminal.
It should be understood that, in this embodiment S102, selecting, according to the channel quality parameter, a modulation scheme currently adapted to the downlink channel of the terminal from the first modulation scheme and the second modulation scheme may further include:
when the channel quality parameter is greater than or equal to a preset second modulation mode switching threshold value and the modulation mode currently used by the terminal is the first modulation mode, selecting the second modulation mode as a modulation mode currently adapted to a downlink channel of the terminal;
when the channel quality parameter is less than or equal to a preset first modulation mode switching threshold value and the modulation mode currently used by the terminal is a second modulation mode, selecting the first modulation mode as a modulation mode currently adapted to a downlink channel of the terminal;
the second modulation mode switching threshold is greater than the first modulation mode switching threshold.
Of course, it can be understood that, in this embodiment S101, the obtained channel quality parameter may include at least one of a downlink flow value, a channel quality indication value, a signal-to-noise ratio value, and a traffic channel modulation and coding scheme index value; at this time, correspondingly, the first modulation mode switching threshold value includes at least one of a first preset downlink traffic threshold value, a first preset channel quality indication threshold value, a first preset signal-to-noise ratio threshold value, and a first preset service channel modulation coding scheme limit index value; the second modulation mode switching threshold value includes at least one of a second preset downlink traffic threshold value, a second preset channel quality indication threshold value, a second preset signal-to-noise ratio threshold value, and a second preset service channel modulation coding scheme limit index value.
That is to say, the obtained channel quality parameter may be any one of a downlink traffic value, a channel quality indication value, a signal-to-noise ratio value, and a traffic channel modulation coding scheme index value, or may be any two, or any three, or four of the downlink traffic value, the channel quality indication value, the signal-to-noise ratio value, and the traffic channel modulation coding scheme index value.
For example, if the obtained channel quality parameter is a downlink traffic value, the first modulation mode switching threshold corresponds to a first preset downlink traffic threshold, and the second modulation mode switching threshold corresponds to a second preset downlink traffic threshold, where the selection of the modulation mode currently adapted to the terminal downlink channel may specifically be:
when the downlink flow value is greater than or equal to a preset second preset downlink flow threshold value and the modulation mode currently used by the terminal is the first modulation mode, selecting the second modulation mode as a modulation mode currently adapted to the downlink channel of the terminal;
and when the downlink flow value is less than or equal to a preset first preset downlink flow threshold value and the modulation mode currently used by the terminal is a second modulation mode, selecting the first modulation mode as a modulation mode currently adapted to the downlink channel of the terminal.
Here, a specific manner of acquiring the downlink flow rate value in the present embodiment needs to be described. For example, a statistical window may be designed, the window length of the statistical window is N (adjustable, for example, it may be set to 512 or other lengths), and the newly Transmitted TBSize (TTI) (i.e. the sum of the traffic transmitted in the length unit) normally scheduled in this TTI (length unit within the window) is counted in the statistical window, where the following manner may be adopted:
Sum(TBSize)＝Sum(TBSize)+TBSize(TTI)；
CNTn＝CNTn+1；
and when CNTn = N, selecting whether to switch to a first modulation mode or a second modulation mode according to Sum (TBSize), namely a statistical downlink flow value, and clearing the Sum (TBSize) and the CNTn.
Of course, if the obtained channel quality parameter is the signal-to-noise ratio value, the first modulation mode switching threshold value corresponds to a first preset signal-to-noise ratio threshold value, and the second modulation mode switching threshold value corresponds to a second preset signal-to-noise ratio threshold value, at this time, the selection of the modulation mode currently adapted to the downlink channel of the terminal may specifically be:
when the signal-to-noise ratio is greater than or equal to a preset second preset signal-to-noise ratio threshold value and the current modulation mode used by the terminal is the first modulation mode, selecting the second modulation mode as a modulation mode currently adaptive to a downlink channel of the terminal;
and when the signal-to-noise ratio is smaller than or equal to a preset first preset signal-to-noise ratio threshold and the modulation mode currently used by the terminal is a second modulation mode, selecting the first modulation mode as a modulation mode currently adapted to a downlink channel of the terminal.
If the obtained channel quality parameter is a downlink traffic value and a channel quality indication value, the first modulation mode switching threshold value corresponds to a first preset downlink traffic threshold value and a first preset channel quality indication threshold value, and the second modulation mode switching threshold value corresponds to a second preset downlink traffic threshold value and a second preset channel quality indication threshold value, at this time, the selection of the modulation mode currently adapted to the downlink channel of the terminal may specifically be:
when the downlink flow value is greater than or equal to a preset second preset downlink flow threshold value, the channel quality indicated value is greater than or equal to a preset second preset channel quality indicated threshold value, and the modulation mode currently used by the terminal is the first modulation mode, selecting the second modulation mode as a modulation mode currently adapted to the downlink channel of the terminal;
and when the downlink flow value is less than or equal to a preset first preset downlink flow threshold, the channel quality indicated value is less than or equal to a preset first preset channel quality indicated threshold, and the modulation mode currently used by the terminal is a second modulation mode, selecting the first modulation mode as a modulation mode currently adaptive to the downlink channel of the terminal.
S103: and the control terminal uses the selected modulation mode to carry out communication.
It should be understood that, in this embodiment, if the selected modulation scheme is the second modulation scheme and the modulation scheme currently used by the terminal is the first modulation scheme, before controlling the terminal to use the selected second modulation scheme, it may also be determined whether the terminal supports the second modulation scheme. The specific method can be as follows: and if the terminal supports the second modulation mode, controlling the terminal to use the selected second modulation mode for communication, and if the terminal does not support the second modulation mode, controlling the terminal to continue to use the current first modulation mode for communication.
It should be noted that, in this embodiment, the first modulation scheme may be a 16QAM modulation scheme or a 64QAM modulation scheme, and the second modulation scheme may be a 256QAM modulation scheme. It should be understood that, according to an actual application scenario, the first modulation scheme may also be a 32QAM modulation scheme or a 128QAM modulation scheme, and certainly, the second modulation scheme is not limited to the 256QAM modulation scheme, and may be adjusted according to a specific actual application scenario.
According to the modulation mode control method provided by the embodiment, the modulation mode currently adaptive to the downlink channel of the terminal is selected from the first modulation mode and the second modulation mode according to the acquired channel quality parameter, so that the terminal is controlled to communicate by using the selected modulation mode, the terminal can select a proper modulation mode to perform data communication according to the quality condition of the downlink channel, and can adjust in real time according to the channel condition of the terminal, and the utilization rate of the bandwidth of the downlink channel and the fairness of resource allocation are greatly improved.
Example two:
for a better understanding of the present invention, the following description is given with reference to a specific example, which may be specifically referred to as fig. 2, and includes:
s201: and acquiring the index value of the current service channel modulation coding scheme of the downlink channel of the terminal.
S202: and selecting a modulation mode currently adapted to a downlink channel of the terminal from a 64QAM modulation mode and a 256QAM modulation mode according to the acquired index value of the modulation coding scheme of the service channel.
S203: and the control terminal uses the selected modulation mode to carry out communication.
It should be understood that, in this embodiment S202, selecting a modulation scheme currently adapted to the downlink channel of the terminal from the 64QAM modulation scheme and the 256QAM modulation scheme according to the traffic channel modulation coding scheme index value may further include:
when the index value of the modulation and coding scheme of the service channel is greater than or equal to the limit index value of a preset second preset modulation and coding scheme of the service channel and the modulation mode currently used by the terminal is a 64QAM modulation mode, selecting a 256QAM modulation mode as a modulation mode currently adapted to a downlink channel of the terminal;
and when the index value of the modulation and coding scheme of the service channel is less than or equal to the limit index value of a preset first preset modulation and coding scheme of the service channel and the current modulation mode used by the terminal is a 256QAM modulation mode, selecting a 64QAM modulation mode as a modulation mode which is currently adapted to a downlink channel of the terminal.
And the second preset traffic channel modulation coding scheme limit index value is greater than the first preset traffic channel modulation coding scheme limit index value.
In this embodiment, the modulation and transport block index table in the 64QAM modulation scheme protocol may be referred to as table one, and the modulation and transport block index table in the 256QAM modulation scheme protocol may be referred to as table two: watch 1
The MCS Index in the two tables indicates the Index of the modulation coding scheme of the traffic channel, the larger the value of the Index is, the higher the modulation order is, the TBS Index indicates the Index of the transport block, the larger the value is, the larger the corresponding transport block is, that is, the larger the amount of data transmitted in unit time is,
it should be further understood that the values of the first preset traffic channel modulation coding scheme limit index value and the second preset traffic channel modulation coding scheme limit index value may be flexibly selected according to a specific application scenario, and the following description is specifically made with the first preset traffic channel modulation coding scheme limit index value being equal to 5 and the second preset traffic channel modulation coding scheme limit index value being equal to 28.
When the obtained index value of the modulation coding scheme of the service channel is more than or equal to 28 and the modulation mode currently used by the terminal is a 64QAM modulation mode, selecting a 256QAM modulation mode as a modulation mode currently adapted to a downlink channel of the terminal;
and when the obtained index value of the modulation coding scheme of the service channel is less than or equal to 5 and the current modulation mode used by the terminal is a 256QAM modulation mode, selecting a 64QAM modulation mode as a modulation mode currently adaptive to a downlink channel of the terminal.
Here, it should be further noted that, in this embodiment, if the selected modulation scheme is a 256QAM modulation scheme and the modulation scheme currently used by the terminal is a 64QAM modulation scheme, before the control terminal uses the selected 256QAM modulation scheme, it may be further determined whether the terminal supports the 256QAM modulation scheme, if the terminal supports the 256QAM modulation scheme, the control terminal uses the 256QAM modulation scheme for communication, and if the terminal does not support the 256QAM modulation scheme, the control terminal continues to use the current 64QAM modulation scheme. Specifically, whether the terminal supports the 256QAM modulation scheme may be determined according to a high-level parameter altCQI-Table-r12 in the capability level information reported by the terminal, if the high-level parameter altCQI-Table-r12 is 1, it indicates that the terminal supports the 256QAM modulation scheme, and if the high-level parameter altCQI-Table-r12 is 0, it indicates that the terminal does not support the 256QAM modulation scheme. Of course, if the selected modulation scheme is the 64QAM modulation scheme and the modulation scheme currently used by the terminal is the 256QAM modulation scheme, before the control terminal uses the selected 64QAM modulation scheme, it may also be determined whether the terminal supports the 64QAM modulation scheme, if the terminal does not support the 64QAM modulation scheme, the control terminal continues to use the current 256QAM modulation scheme, and if the terminal supports the 64QAM modulation scheme, the control terminal uses the 64QAM modulation scheme.
If the modulation scheme used by the current terminal is a 64QAM modulation scheme, the process of whether to switch to the 256QAM modulation scheme may be as shown in fig. 3:
s301: terminals currently use a 64QAM modulation scheme for communication.
S302: and judging whether the index value of the modulation and coding scheme of the traffic channel is greater than or equal to 28 and whether the terminal supports the 256QAM modulation mode, if so, turning to S303, and if not, turning to S301.
S303: sending a reconfiguration signaling to the terminal.
Wherein, altCQI-Table-r12present in the terminal reconfiguration signaling is set to 1.
S304: the terminal uses 256QAM scheduling mode to communicate.
If the modulation scheme used by the current terminal is a 256QAM modulation scheme, the process of determining whether to switch to a 64QAM modulation scheme may be as shown in fig. 4:
s401: the terminal currently uses a 256QAM modulation scheme for communication.
S402: and judging whether the index value of the modulation and coding scheme of the traffic channel is less than or equal to 5 and whether the terminal supports a 64QAM modulation mode, if so, turning to S403, and if not, turning to S401.
S403: sending a reconfiguration signaling to the terminal.
Wherein, altCQI-Table-r12present in the terminal reconfiguration signaling is set to be 0.
S404: the terminal uses 64QAM scheduling mode to communicate.
For better understanding of the present invention, refer to fig. 5, where fig. 5 shows a schematic diagram of switching between a 64QAM scheduling scheme and a 256QAM scheduling scheme in this embodiment, an Itbs represents a TBS Index, i.e., a transport block Index; MCS stands for MCS Index, i.e. the traffic channel modulation coding scheme Index; CR is an abbreviation of code rate, i.e., code rate; qm represents the modulation order; SE denotes spectral efficiency.
By the modulation mode control method provided by the embodiment, a proper modulation mode can be selected for data communication according to the quality condition of the downlink channel, and the adjustment can be performed in real time according to the channel condition of the terminal, so that the smoothness of the downlink channel data transmission at a lower modulation order is ensured, and the requirement of the downlink channel data transmission on a higher modulation order is met.
Example three:
in order to enable the terminal to select a suitable modulation scheme according to the quality condition of the downlink channel to perform data communication, so as to improve the utilization rate of the bandwidth of the downlink channel, this embodiment provides a modulation scheme control device, which may specifically be seen from fig. 6, and includes: a channel quality parameter obtaining module 61, a modulation mode selecting module 62 and a processing module 63. The channel quality parameter obtaining module 61 is configured to obtain a current channel quality parameter of a downlink channel of the terminal; the modulation mode selection module 62 is configured to select, according to the channel quality parameter, a modulation mode currently adapted to the downlink channel of the terminal from a first modulation mode and a second modulation mode, where a maximum modulation order of the second modulation mode is greater than a maximum modulation order of the first modulation mode; the processing module 63 is configured to control the terminal to perform communication using the selected modulation method.
In this embodiment, the selecting, by the modulation scheme selecting module 62, a modulation scheme currently adapted to the downlink channel of the terminal from the first modulation scheme and the second modulation scheme according to the channel quality parameter includes:
when the channel quality parameter is greater than or equal to a preset second modulation mode switching threshold value and the modulation mode currently used by the terminal is the first modulation mode, selecting the second modulation mode as a modulation mode currently adapted to a downlink channel of the terminal;
when the channel quality parameter is less than or equal to a preset first modulation mode switching threshold value and the modulation mode currently used by the terminal is a second modulation mode, selecting the first modulation mode as a modulation mode currently adaptive to a downlink channel of the terminal;
the second modulation mode switching threshold is greater than the first modulation mode switching threshold.
It should be understood that the channel quality parameter obtained by the channel quality parameter obtaining module 61 in this embodiment may include at least one of a downlink flow value, a channel quality indication value, a signal-to-noise ratio value and a traffic channel modulation and coding scheme index value; at this time, correspondingly, the first modulation mode switching threshold value includes at least one of a first preset downlink traffic threshold value, a first preset channel quality indication threshold value, a first preset signal-to-noise ratio threshold value, and a first preset service channel modulation coding scheme limit index value; the second modulation mode switching threshold value includes at least one of a second preset downlink traffic threshold value, a second preset channel quality indication threshold value, a second preset signal-to-noise ratio threshold value, and a second preset service channel modulation coding scheme limit index value. That is to say, the obtained channel quality parameter may be any one of a downlink flow value, a channel quality indication value, a signal-to-noise ratio value and a traffic channel modulation and coding scheme index value, or may be any two, any three, or four of a downlink flow value, a channel quality indication value, a signal-to-noise ratio value and a traffic channel modulation and coding scheme index value.
For example, if the channel quality parameter obtained by the channel quality parameter obtaining module 61 is a channel quality indication value, the first modulation mode switching threshold value corresponds to a first preset channel quality indication threshold value, and the second modulation mode switching threshold value corresponds to a second preset channel quality indication threshold value, at this time, the selection of the modulation mode currently adapted to the downlink channel of the terminal may specifically be:
when the channel quality indicated value is greater than or equal to a preset second preset channel quality indicated threshold value and the modulation mode currently used by the terminal is the first modulation mode, selecting the second modulation mode as a modulation mode currently adapted to the downlink channel of the terminal;
and when the channel quality indicated value is less than or equal to a preset first preset channel quality indicated threshold value and the modulation mode currently used by the terminal is a second modulation mode, selecting the first modulation mode as a modulation mode currently adapted to the downlink channel of the terminal.
If the channel quality parameters obtained by the channel quality parameter obtaining module 61 include the channel quality indication value, the signal-to-noise ratio value and the traffic channel modulation coding scheme index value,
if the channel quality parameter acquired by the channel quality parameter acquiring module 61 includes a downlink traffic value, a channel quality indication value, and a traffic channel modulation coding scheme index value, the first modulation mode switching threshold value corresponds to a first preset downlink traffic threshold value, a first preset channel quality indication threshold value, and a first preset traffic channel modulation coding scheme limit index value, and the second modulation mode switching threshold value corresponds to a second preset downlink traffic threshold value, a second preset channel quality indication threshold value, and a second preset traffic channel modulation coding scheme limit index value, at this time, the selection of the modulation mode currently adapted to the terminal downlink channel may specifically be:
when the downlink traffic value is greater than or equal to a preset second preset downlink traffic threshold value, the channel quality indicated value is greater than or equal to a preset second preset channel quality indicated threshold value, and the traffic channel modulation coding scheme index value is greater than or equal to a preset second preset traffic channel modulation coding scheme limit index value, and the modulation mode currently used by the terminal is the first modulation mode, selecting the second modulation mode as the modulation mode currently adapted to the downlink channel of the terminal;
and when the downlink traffic value is less than or equal to a preset first preset downlink traffic threshold, the channel quality indicated value is less than or equal to a preset first preset channel quality indicated threshold, the traffic channel modulation coding scheme index value is less than or equal to a preset second preset traffic channel modulation coding scheme limit index value, and the modulation mode currently used by the terminal is a second modulation mode, selecting the first modulation mode as a modulation mode currently adapted to the downlink channel of the terminal.
It should be noted that, when the current channel parameter of the downlink channel of the terminal, which is acquired by the channel quality parameter acquiring module 61, includes a service channel modulation and coding scheme index value, the first preset service channel modulation and coding scheme limit index value and the second preset service channel modulation and coding scheme limit index value may be specifically and flexibly set by a developer according to a specific application scenario, for example, the first preset service channel modulation and coding scheme limit index value may be 5, and the second preset service channel modulation and coding scheme limit index value may be 28.
It should be understood that the modulation scheme control module provided in this embodiment may further include a determining module, configured to determine whether the terminal supports the second modulation scheme after the modulation scheme selecting module 62 selects the second modulation scheme and before the modulation scheme currently used by the terminal is the first modulation scheme and the processing module 63 controls the terminal to use the selected second modulation scheme. Specifically, the method can be as follows: if the judging module judges that the terminal supports the second modulation mode, the processing module 63 controls the terminal to use the selected second modulation mode for communication, and if the judging module judges that the terminal does not support the second modulation mode, the processing module 63 controls the terminal to continue to use the current first modulation mode for communication.
Of course, the first modulation scheme in this embodiment may be a 16QAM modulation scheme or a 64QAM modulation scheme, and the second modulation scheme may be a 256QAM modulation scheme. It should be understood that, according to an actual application scenario, the first modulation scheme may also be a 32QAM modulation scheme or a 128QAM modulation scheme, and certainly, the second modulation scheme is not limited to the 256QAM modulation scheme, and may be adjusted according to a specific actual application scenario.
In addition, it should be noted that the functions of the channel quality parameter obtaining module 61, the modulation scheme selecting module 62, the processing module 63 and the determining module in this embodiment may be implemented by a processor or a controller in the base station.
Based on the modulation scheme control apparatus, the present embodiment further provides a base station, which may specifically be as shown in fig. 7, and includes the modulation scheme control apparatus 71.
According to the modulation mode control device and the base station provided by the embodiment of the invention, the current channel quality parameter of the downlink channel of the terminal is obtained through the channel quality parameter obtaining module, the modulation mode selecting module selects the modulation mode which is currently adaptive to the downlink channel of the terminal from the first modulation mode and the second modulation mode according to the channel quality parameter, so that the terminal is controlled to communicate by using the selected modulation mode, the terminal can select the proper modulation mode to communicate data according to the quality condition of the downlink channel, and can be adjusted in real time according to the channel condition of the terminal, and the utilization rate of the bandwidth of the downlink channel and the fairness of resource allocation are greatly improved.
It will be apparent to those skilled in the art that the modules or steps of the embodiments of the invention described above may be implemented in a general purpose computing device, they may be centralized in a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented in program code executable by a computing device, such that they may be stored on a computer storage medium (ROM/RAM, magnetic disk, optical disk) for execution by a computing device, and in some cases, the steps shown or described may be performed in an order different from that described herein, or they may be separately fabricated as individual integrated circuit modules, or multiple modules or steps therein may be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The foregoing is a more detailed description of embodiments of the present invention, and the present invention is not to be considered limited to such descriptions. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (8)
1. A modulation mode control method comprises the following steps:
acquiring a current channel quality parameter of a downlink channel of a terminal;
selecting a modulation mode currently adaptive to the downlink channel of the terminal from a first modulation mode and a second modulation mode according to the channel quality parameter, wherein the method comprises the following steps: when the channel quality parameter is greater than or equal to a preset second modulation mode switching threshold value and the modulation mode currently used by the terminal is the first modulation mode, selecting the second modulation mode as a modulation mode currently adapted to the downlink channel of the terminal; when the channel quality parameter is less than or equal to a preset first modulation mode switching threshold value and the modulation mode currently used by the terminal is the second modulation mode, selecting the first modulation mode as a modulation mode currently adapted to the downlink channel of the terminal; the second modulation mode switching threshold value is greater than the first modulation mode switching threshold value; the maximum modulation order of the second modulation mode is greater than that of the first modulation mode;
and controlling the terminal to communicate by using the selected modulation mode.
2. The modulation scheme control method according to claim 1, wherein the channel quality parameter comprises at least one of a downlink traffic value, a channel quality indicator value, a signal-to-noise ratio value, and a traffic channel modulation coding scheme index value;
the first modulation mode switching threshold value corresponds to at least one of a first preset downlink flow threshold value, a first preset channel quality indication threshold value, a first preset signal-to-noise ratio threshold value and a first preset service channel modulation coding scheme limit index value;
the second modulation mode switching threshold value correspondingly includes at least one of a second preset downlink traffic threshold value, a second preset channel quality indication threshold value, a second preset signal-to-noise ratio threshold value and a second preset service channel modulation coding scheme limit index value.
3. The modulation scheme control method of claim 2 wherein when the channel quality parameter comprises a traffic channel modulation coding scheme index value, the first preset traffic channel modulation coding scheme limit index value is equal to 5, and the second preset traffic channel modulation coding scheme limit index value is equal to 28.
4. The modulation scheme control method according to any one of claims 1 to 3, wherein when the selected modulation scheme is a second modulation scheme and the modulation scheme currently used by the terminal is the first modulation scheme, it is determined whether the terminal supports the second modulation scheme before controlling the terminal to use the selected second modulation scheme.
5. The modulation scheme control method according to any one of claims 1 to 3, wherein the modulation scheme corresponding to the maximum modulation order of the first modulation scheme is a 16QAM modulation scheme or a 64QAM modulation scheme, and the modulation scheme corresponding to the maximum modulation order of the second modulation scheme is a 256QAM modulation scheme.
6. A modulation scheme control apparatus comprising:
a channel quality parameter obtaining module, configured to obtain a current channel quality parameter of a downlink channel of a terminal;
a modulation mode selection module, configured to select, according to the channel quality parameter, a modulation mode currently adapted to the downlink channel of the terminal from a first modulation mode and a second modulation mode, where the modulation mode selection module includes: when the channel quality parameter is greater than or equal to a preset second modulation mode switching threshold value and the modulation mode currently used by the terminal is the first modulation mode, selecting the second modulation mode as a modulation mode currently adapted to the downlink channel of the terminal; when the channel quality parameter is less than or equal to a preset first modulation mode switching threshold value and the modulation mode currently used by the terminal is the second modulation mode, selecting the first modulation mode as a modulation mode currently adapted to the downlink channel of the terminal; the second modulation mode switching threshold value is greater than the first modulation mode switching threshold value; the maximum modulation order of the second modulation mode is greater than that of the first modulation mode;
and the processing module is used for controlling the terminal to communicate by using the selected modulation mode.
7. The modulation scheme control device of claim 6 wherein the channel quality parameter comprises at least one of a downlink traffic value, a channel quality indicator value, a signal-to-noise value, and a traffic channel modulation coding scheme index value;
the first modulation mode switching threshold value corresponds to at least one of a first preset downlink flow threshold value, a first preset channel quality indication threshold value, a first preset signal-to-noise ratio threshold value and a first preset service channel modulation coding scheme limit index value;
the second modulation mode switching threshold value correspondingly includes at least one of a second preset downlink traffic threshold value, a second preset channel quality indication threshold value, a second preset signal-to-noise ratio threshold value and a second preset service channel modulation coding scheme limit index value.
8. A base station comprising the modulation scheme control apparatus according to any one of claims 6-7.
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| CN111865847B (en) * | 2019-04-30 | 2021-11-30 | 华为技术有限公司 | Data transmission method and device |
| CN110336642A (en) * | 2019-07-05 | 2019-10-15 | 北京神经元网络技术有限公司 | It is a kind of for the code-change modulator approach of the high-speed industrial communication system based on OFDM system, terminal, electronic equipment and the system |
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