CN110266443B - Self-adaptive adjustment method, system and device for trunking communication transmission mode - Google Patents

Self-adaptive adjustment method, system and device for trunking communication transmission mode Download PDF

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CN110266443B
CN110266443B CN201910724862.1A CN201910724862A CN110266443B CN 110266443 B CN110266443 B CN 110266443B CN 201910724862 A CN201910724862 A CN 201910724862A CN 110266443 B CN110266443 B CN 110266443B
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cqi
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CN110266443A (en
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孙鑫
李博
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Beijing Yunan Zhiwei Technology Co ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • 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
    • 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
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0061—Error detection codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports

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Abstract

The invention belongs to the technical field of trunking communication, and particularly relates to a self-adaptive adjustment method, a self-adaptive adjustment system and a self-adaptive adjustment device for a trunking communication transmission mode, aiming at solving the problems of resource waste and low reliability caused by the fact that a downlink modulation coding mode cannot be self-adaptively adjusted according to the distance between UE (user equipment) and eNB (evolved node B). The method comprises the following steps: acquiring parameters of a cluster terminal, and acquiring a CQI (channel quality indicator) measurement value and a CRC (cyclic redundancy check) value based on a downlink reference signal and a service signal; calibrating the CQI measurement value to obtain a calibrated CQI value and an expected adjustment amount of the CQI; and when the absolute value of the CQI expected adjustment quantity is larger than the judgment threshold of reporting the CQI, reporting the information and acquiring the transmission mode of the trunking communication for the next transmission according to the current transmission mode of the trunking communication. The invention can quickly and effectively determine the downlink transmission mode under the condition that the cluster UE does not feed back ACK/NACK, thereby improving the throughput and reliability of the system.

Description

Self-adaptive adjustment method, system and device for trunking communication transmission mode
Technical Field
The invention belongs to the technical field of trunking communication, and particularly relates to a self-adaptive adjustment method, a self-adaptive adjustment system and a self-adaptive adjustment device for a trunking communication transmission mode.
Background
In a Long Term Evolution (LTE) technology system, point-to-multipoint group communication is generally performed in a downlink direction, facing a cell. One of the downlink key technologies of LTE, AMC is an Adaptive Modulation and Coding (AMC) technique used in a radio channel, and ensures the transmission quality of a link by adjusting the Modulation and Coding rate of the radio link transmission.
In LTE, the AMC process is that after receiving a downlink common reference signal, a terminal (UE) performs downlink channel quality measurement according to the reference signal, the terminal feeds back channel quality information to a base station (eNB) through a feedback channel, and the base station dynamically selects an appropriate downlink modulation coding scheme for subsequent downlink service transmission according to the fed-back channel quality information and acknowledgement information ACK/NACK fed back by the terminal, so that the next communication transmission has higher reliability and transmission accuracy. When the channel condition is poor, selecting a smaller modulation mode and a smaller coding rate; when the channel condition is better, a larger modulation mode is selected, so that the transmission rate is maximized while reliable transmission is considered.
However, in the LTE broadband trunking communication system, the AMC scheme is no longer applicable: because the group service is the condition of the point-to-multipoint group downlink service, the terminal does not feed back the CQI and the downlink acknowledgement message ACK/NACK to the base station any more, and the base station side cannot know whether the UE correctly demodulates the transmitted downlink data, so that the base station cannot more accurately determine the downlink modulation coding mode in the next communication.
In summary, according to a preconfigured downlink modulation and coding scheme, when a group UE approaches an eNB, an eNB in an existing LTE trunking system may cause waste of radio spectrum resources due to a preconfigured downlink modulation and coding scheme being too low; when the group UE is far away from the eNB, the preconfigured downlink modulation and coding scheme is too high, which may cause a downlink analysis error, affect the downlink service performance, and degrade the user experience.
Disclosure of Invention
In order to solve the above problems in the prior art, that is, the problem that the downlink modulation and coding scheme cannot be adaptively adjusted according to the distance between the UE and the eNB, which results in resource waste and low reliability, the present invention provides an adaptive adjustment method for a trunking communication transmission scheme, the adaptive adjustment method comprising:
step S10, acquiring a CQI value adopted by the current trunking communication transmission of the trunking terminal, a judgment threshold of reported CQI, a BLER preset threshold of CQI calibration and a corresponding preset CQI adjustment amount;
step S20, acquiring CQI measured value of channel based on the acquired downlink reference signal; analyzing the acquired downlink service signal to acquire a CRC (cyclic redundancy check) value;
step S30, based on the BLER preset threshold of CQI calibration and the corresponding preset CQI adjustment amount, the CQI value adopted by the current cluster communication transmission, calibrating the CQI measurement value according to the CRC check value, and obtaining the calibrated CQI value and the expected CQI adjustment amount;
step S40, judging whether the absolute value of the CQI expected adjustment quantity is larger than the judgment threshold of the reported CQI, if so, reporting the calibrated CQI value to a base station; otherwise, using the preset initial trunking communication transmission mode as the trunking communication transmission mode in the next transmission;
and step S50, the base station acquires the transmission mode of the cluster communication for the next transmission based on the reported calibrated CQI value and the transmission mode of the current cluster communication.
In some preferred embodiments, the CQI measurement for the channel is a wideband CQI measurement or a sub-band CQI measurement.
In some preferred embodiments, in step S20, "analyze the acquired downlink service signal to obtain a CRC check value", the method includes:
performing physical layer analysis on the acquired downlink service signal, and setting a CRC (cyclic redundancy check) value as a first preset value if an analysis result is correct; and if the analysis result is incorrect, setting the CRC check value as a second preset value.
In some preferred embodiments, the first preset value is 0, and the second preset value is 1.
In some preferred embodiments, in step S30, "calibrating the measured CQI value of the channel according to the CRC check value based on the preset BLER threshold and the corresponding preset CQI adjustment amount for CQI calibration and the CQI value used in current trunking communication transmission, and obtaining a calibrated CQI value and a desired CQI adjustment amount" includes:
step S31, calculating the difference value between the CQI value adopted by the current trunking communication transmission and the CQI measured value, and obtaining the corresponding BLER target value according to the corresponding relation between the preset interval to which the difference value belongs and the BLER value;
step S32, based on the BLER target value, CRC check value, BLER preset threshold of CQI calibration and corresponding preset CQI adjustment quantity, calculating the single adjustment quantity of the current CQI;
step S33, based on the current CQI single adjustment amount and the last CQI adjustment amount, obtaining the accumulative adjustment amount of CQI;
step S34, the sum of the cumulative adjustment amount of CQI and the CQI measurement value is used as a calibrated CQI value, and the difference between the calibrated CQI value and the CQI value used in the current trunking communication transmission is used as an expected adjustment amount of CQI.
In some preferred embodiments, the CQI single adjustment amount is calculated by:
Figure BDA0002158555280000041
wherein, TCQIRepresenting the single adjustment of the CQI, BLER representing the BLER target value, CRC representing the CRC check value, DCQIThe step size is adjusted for a preset CQI a single time.
On the other hand, the invention provides a self-adaptive adjustment system of a cluster communication transmission mode, which comprises a parameter acquisition module, a CQI measurement module, a CRC check module, a CQI calibration module, a reporting judgment module and an adjustment module;
the parameter acquisition module is configured to acquire a CQI value adopted by current trunking communication transmission of the trunking terminal, a judgment threshold of reported CQI, a BLER preset threshold of CQI calibration and a corresponding preset CQI adjustment amount;
the CQI measurement module is configured to acquire a CQI measurement value of a channel based on the acquired downlink reference signal;
the CRC check module is configured to analyze the acquired downlink service signal to acquire a CRC check value;
the CQI calibration module is configured to calibrate the CQI measurement value according to a CRC check value based on a BLER preset threshold calibrated by the CQI, a corresponding preset CQI adjustment amount and a CQI value adopted by current trunking communication transmission, and obtain a calibrated CQI value and a CQI expected adjustment amount;
the reporting judging module is configured to judge whether the absolute value of the CQI expected adjustment quantity is greater than the judgment threshold of reporting the CQI, and if so, the calibrated CQI value is reported to a base station;
the adjusting module is configured to obtain, by the base station, a transmission mode for the trunking communication at the next transmission based on the reported calibrated CQI value and the transmission mode of the current trunking communication.
In a third aspect of the present invention, a storage device is proposed, in which a plurality of programs are stored, the programs being adapted to be loaded and executed by a processor to implement the above-mentioned adaptive adjustment method for trunked communication transmission.
In a fourth aspect of the present invention, a processing apparatus is provided, which includes a processor, a storage device; the processor is suitable for executing various programs; the storage device is suitable for storing a plurality of programs; the program is adapted to be loaded and executed by a processor to implement the above-described adaptive adjustment method of a trunked communication transmission.
The invention has the beneficial effects that:
the self-adaptive adjustment method of the trunking communication transmission mode can still quickly and effectively determine the downlink transmission mode by the base station under the condition that the trunking UE does not feed back ACK/NACK, thereby improving the throughput and the reliability of the system.
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Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 is a schematic flow chart of an adaptive adjustment method for a trunking communication transmission mode according to the present invention.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the related invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The invention relates to a self-adaptive adjusting method of a trunking communication transmission mode, which comprises the following steps:
step S10, acquiring a CQI value adopted by the current trunking communication transmission of the trunking terminal, a judgment threshold of reported CQI, a BLER preset threshold of CQI calibration and a corresponding preset CQI adjustment amount;
step S20, acquiring CQI measured value of channel based on the acquired downlink reference signal; analyzing the acquired downlink service signal to acquire a CRC (cyclic redundancy check) value;
step S30, based on the BLER preset threshold of CQI calibration and the corresponding preset CQI adjustment amount, the CQI value adopted by the current cluster communication transmission, calibrating the CQI measurement value according to the CRC check value, and obtaining the calibrated CQI value and the expected CQI adjustment amount;
step S40, judging whether the absolute value of the CQI expected adjustment quantity is larger than the judgment threshold of the reported CQI, if so, reporting the calibrated CQI value to a base station; otherwise, using the preset initial trunking communication transmission mode as the trunking communication transmission mode in the next transmission;
and step S50, the base station acquires the transmission mode of the cluster communication for the next transmission based on the reported calibrated CQI value and the transmission mode of the current cluster communication.
In order to more clearly describe the adaptive adjustment method of the trunking communication transmission scheme of the present invention, each step in the embodiment of the method of the present invention is described in detail below with reference to fig. 1.
The adaptive adjustment method for the trunking communication transmission mode of the embodiment of the invention comprises the steps of S10-S50, and the steps are described in detail as follows:
step S10, obtaining a CQI value used for current trunking communication transmission of the trunking terminal, a judgment threshold of reported CQI, a BLER preset threshold for CQI calibration, and a corresponding preset CQI adjustment amount.
Step S20, acquiring CQI measured value of channel based on the acquired downlink reference signal; and analyzing the acquired downlink service signal to acquire a CRC value.
The CQI measurement for a channel is either a wideband CQI measurement or a sub-band CQI measurement.
"analyze the downlink traffic signal obtained, obtain CRC check value", its method is:
performing physical layer analysis on the acquired downlink service signal, and setting a CRC (cyclic redundancy check) value as a first preset value if an analysis result is correct; and if the analysis result is incorrect, setting the CRC check value as a second preset value.
The first preset value is 0, and the second preset value is 1:
CRC is 0, which represents that the analysis result is correct, and the check is passed; CRC 1 means that the parsing result is incorrect and the check fails.
Step S30, based on the BLER preset threshold for CQI calibration and the corresponding preset CQI adjustment amount, and the CQI value used in the current trunking communication transmission, calibrating the CQI measurement value according to the CRC check value, and obtaining a calibrated CQI value and a CQI expected adjustment amount.
Step S31, calculating a difference between the CQI value used for the current trunking communication transmission and the CQI measurement value, and obtaining a corresponding BLER target value according to a preset interval to which the difference belongs and a BLER value correspondence.
And calculating the difference value between the transmission mode of the current trunking communication and the CQI measured value in the step S20, and obtaining the BLER target value according to the corresponding relation between the preset interval to which the difference value belongs and the target BLER value. In an embodiment of the present invention, a corresponding relationship between a preset interval to which the difference value belongs and the target BLER value is shown in table 1:
TABLE 1
Figure BDA0002158555280000071
In the above table, X is the difference between the CQI measurement value of step S20 and the CQI value used for communication with the current cluster. In practical applications, the specific values are not limited thereto.
Step S32, based on the BLER target value, the CRC check value, the BLER preset threshold for CQI calibration, and the corresponding preset CQI adjustment amount, calculating the present single CQI adjustment amount.
The calculation method of the CQI single adjustment amount is shown as the formula (1):
Figure BDA0002158555280000081
wherein, TCQIRepresenting the single adjustment of the CQI, BLER representing the BLER target value, CRC representing the CRC check value, DCQIThe step size is adjusted for a preset CQI a single time.
For the case where the BLER target value is equal to 1, when the CRC is 1, the single adjustment amount of the CQI is equal to 0; when the CRC is 0, the single adjustment amount of the CQI is equal to the preset adjustment step.
Step S33, based on the current CQI single adjustment amount and the previous CQI adjustment amount, obtains an accumulated adjustment amount of CQI.
The calculation method of the CQI cumulative adjustment amount is shown in formula (2):
L'CQI＝TCQI+LCQIformula (2)
Wherein, L'CQIAccumulating the adjustment amount, T, for CQICQIFor the single adjustment of the CQI calculated this time, LCQIThe adjustment amount is accumulated for the historical CQI.
And when no historical CQI accumulated adjustment amount exists, setting the CQI accumulated adjustment amount to be zero, and taking the current CQI accumulated adjustment amount as the historical CQI accumulated adjustment amount in the next calculation.
Step S34, the sum of the cumulative adjustment amount of CQI and the CQI measurement value is used as a calibrated CQI value, and the difference between the calibrated CQI value and the CQI value used in the current trunking communication transmission is used as an expected adjustment amount of CQI.
Step S40, judging whether the absolute value of the CQI expected adjustment quantity is larger than the judgment threshold of the reported CQI, if so, reporting the calibrated CQI value to a base station; otherwise, the preset initial trunking communication transmission mode is used as the trunking communication transmission mode in the next transmission.
And when the absolute value of the expected CQI adjustment quantity is larger than the preset CQI reporting threshold, reporting the calibrated CQI to the base station through a feedback channel. The selection of the preset CQI reporting threshold affects the feedback overhead of the system and the performance of the system. Therefore, the system can be selected in a trade-off manner according to the requirements of the system on the feedback overhead and the performance.
And step S50, the base station acquires the transmission mode of the cluster communication for the next transmission based on the reported calibrated CQI value and the transmission mode of the current cluster communication.
The base station determines the transmission mode of the trunking communication at the next transmission according to the received calibrated CQI value reported by the terminal in the group and the transmission mode of the current trunking communication, and can compromise and select a proper transmission mode of the trunking communication in the aspects of system throughput and reliability according to the system requirements.
For example, the minimum value of all reported CQIs in the cluster users can be selected to ensure that all the cluster users can correctly receive downlink service data, thereby ensuring the reliability of the system; or selecting the average value of all reported CQI in the cluster users, wherein about half of the users can correctly receive downlink service signals; or selecting a suitable transmission mode of the trunking communication according to the distribution condition of the CQIs reported by the group UEs. In practical applications, the method for selecting the transmission mode of the trunking communication is not limited to the above methods, and is not described herein again.
And when the base station does not acquire the calibrated CQI value reported by the UE in the cluster group, the base station selects a preset initial cluster communication transmission mode to transmit the downlink cluster service.
And when the base station does not receive the updated CQI value reported by the UE in the cluster group for a long time, the base station selects a preset initial cluster communication transmission mode to transmit the downlink cluster service. The timeout threshold of the counter is a preset value and can be set according to the system requirements.
The adaptive adjustment system of the cluster communication transmission mode of the second embodiment of the invention comprises a parameter acquisition module, a CQI measurement module, a CRC check module, a CQI calibration module, a reporting judgment module and an adjustment module;
the parameter acquisition module is configured to acquire a CQI value adopted by current trunking communication transmission of the trunking terminal, a judgment threshold of reported CQI, a BLER preset threshold of CQI calibration and a corresponding preset CQI adjustment amount;
the CQI measurement module is configured to acquire a CQI measurement value of a channel based on the acquired downlink reference signal;
the CRC check module is configured to analyze the acquired downlink service signal to acquire a CRC check value;
the CQI calibration module is configured to calibrate the CQI measurement value according to a CRC check value based on a BLER preset threshold calibrated by the CQI, a corresponding preset CQI adjustment amount and a CQI value adopted by current trunking communication transmission, and obtain a calibrated CQI value and a CQI expected adjustment amount;
the reporting judging module is configured to judge whether the absolute value of the CQI expected adjustment quantity is greater than the judgment threshold of reporting the CQI, and if so, the calibrated CQI value is reported to a base station;
the adjusting module is configured to obtain, by the base station, a transmission mode for the trunking communication at the next transmission based on the reported calibrated CQI value and the transmission mode of the current trunking communication.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process and related description of the system described above may refer to the corresponding process in the foregoing method embodiments, and will not be described herein again.
It should be noted that, the adaptive adjustment system for a trunking communication transmission method provided in the foregoing embodiment is only illustrated by the division of the foregoing functional modules, and in practical applications, the above functions may be allocated to different functional modules according to needs, that is, the modules or steps in the embodiment of the present invention are further decomposed or combined, for example, the modules in the foregoing embodiment may be combined into one module, or may be further split into multiple sub-modules, so as to complete all or part of the functions described above. The names of the modules and steps involved in the embodiments of the present invention are only for distinguishing the modules or steps, and are not to be construed as unduly limiting the present invention.
A storage device according to a third embodiment of the present invention stores therein a plurality of programs adapted to be loaded and executed by a processor to implement the above-described adaptive adjustment method for a trunked communication transmission scheme.
A processing apparatus according to a fourth embodiment of the present invention includes a processor, a storage device; a processor adapted to execute various programs; a storage device adapted to store a plurality of programs; the program is adapted to be loaded and executed by a processor to implement the above-described adaptive adjustment method of a trunked communication transmission.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes and related descriptions of the storage device and the processing device described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
Those of skill in the art would appreciate that the various illustrative modules, method steps, and modules described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that programs corresponding to the software modules, method steps may be located in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. To clearly illustrate this interchangeability of electronic hardware and software, various illustrative components and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as electronic hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing or implying a particular order or sequence.
The terms "comprises," "comprising," or any other similar term are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.

Claims (7)

1. An adaptive adjustment method for a trunking communication transmission mode is characterized by comprising the following steps:
step S10, acquiring a CQI value adopted by the current trunking communication transmission of the trunking terminal, a judgment threshold of reported CQI, a BLER preset threshold of CQI calibration and a corresponding preset CQI adjustment amount;
step S20, acquiring CQI measured value of channel based on the acquired downlink reference signal; analyzing the acquired downlink service signal to acquire a CRC (cyclic redundancy check) value;
step S30, calculating the difference value between the CQI value adopted by the current trunking communication transmission and the CQI measured value, and obtaining the corresponding BLER target value according to the corresponding relation between the preset interval to which the difference value belongs and the BLER value;
based on the BLER target value, the CRC check value, a BLER preset threshold of CQI calibration and a corresponding preset CQI adjustment amount, calculating the single adjustment amount of the CQI at this time:
Figure FDA0003294571760000011
wherein, TCQIRepresenting the single adjustment of the CQI, BLER representing the BLER target value, CRC representing the CRC check value, DCQIAdjusting the step length for the preset CQI once;
obtaining the accumulated adjustment quantity of the CQI based on the single adjustment quantity of the CQI at this time and the previous adjustment quantity of the CQI;
taking the sum of the accumulated adjustment quantity of the CQI and the CQI measurement value as a calibrated CQI value, and taking the difference of the calibrated CQI value minus the CQI value adopted by the current trunking communication transmission as an expected adjustment quantity of the CQI;
step S40, judging whether the absolute value of the CQI expected adjustment quantity is larger than the judgment threshold of the reported CQI, if so, reporting the calibrated CQI value to a base station; otherwise, using the preset initial trunking communication transmission mode as the trunking communication transmission mode in the next transmission;
and step S50, the base station acquires the transmission mode of the cluster communication for the next transmission based on the reported calibrated CQI value and the transmission mode of the current cluster communication.
2. The method of claim 1, wherein the channel CQI measurement is a wideband CQI measurement or a sub-band CQI measurement.
3. The adaptive adjustment method for trunking communication transmission scheme of claim 1, wherein in step S20, "analyze the acquired downlink traffic signal to obtain CRC check value" comprises:
performing physical layer analysis on the acquired downlink service signal, and setting a CRC (cyclic redundancy check) value as a first preset value if an analysis result is correct; and if the analysis result is incorrect, setting the CRC check value as a second preset value.
4. The adaptive adjustment method for trunking communication transmission schemes of claim 3, wherein the first preset value is 0, and the second preset value is 1.
5. A self-adaptive adjustment system of a cluster communication transmission mode is characterized by comprising a parameter acquisition module, a CQI measurement module, a CRC check module, a CQI calibration module, a reporting judgment module and an adjustment module;
the parameter acquisition module is configured to acquire a CQI value adopted by current trunking communication transmission of the trunking terminal, a judgment threshold of reported CQI, a BLER preset threshold of CQI calibration and a corresponding preset CQI adjustment amount;
the CQI measurement module is configured to acquire a CQI measurement value of a channel based on the acquired downlink reference signal;
the CRC check module is configured to analyze the acquired downlink service signal to acquire a CRC check value;
the CQI calibration module is configured to calculate a difference value between a CQI value adopted by current trunking communication transmission and the CQI measurement value, obtain a corresponding BLER target value according to a corresponding relation between a preset interval to which the difference value belongs and a BLER value, and calculate a current single adjustment quantity of the CQI based on the BLER target value, a CRC check value, a BLER preset threshold for CQI calibration and a corresponding preset CQI adjustment quantity:
Figure FDA0003294571760000031
wherein, TCQIRepresenting the single adjustment of the CQI, BLER representing the BLER target value, CRC representing the CRC check value, DCQIAdjusting the step length for the preset CQI once;
obtaining the cumulative adjustment quantity of CQI based on the current CQI single adjustment quantity and the last CQI adjustment quantity, taking the sum of the cumulative adjustment quantity of CQI and the CQI measurement value as a calibrated CQI value, and taking the difference of the calibrated CQI value minus the CQI value adopted by the current trunking communication transmission as the expected adjustment quantity of CQI;
the reporting judging module is configured to judge whether the absolute value of the CQI expected adjustment quantity is greater than the judgment threshold of reporting the CQI, and if so, the calibrated CQI value is reported to a base station;
the adjusting module is configured to obtain, by the base station, a transmission mode for the trunking communication at the next transmission based on the reported calibrated CQI value and the transmission mode of the current trunking communication.
6. A storage medium having stored thereon a plurality of programs, characterized in that the programs are adapted to be loaded and executed by a processor to implement the adaptive adjustment method of trunked communication transmission of any of claims 1-4.
7. A treatment apparatus comprises
A processor adapted to execute various programs; and
a storage device adapted to store a plurality of programs;
wherein the program is adapted to be loaded and executed by a processor to perform:
the method for adaptive adjustment of trunked communication transmission according to any of claims 1 to 4.
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