CN112752241B - Method and device for switching overlay mode of eMTC terminal - Google Patents
Method and device for switching overlay mode of eMTC terminal Download PDFInfo
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- CN112752241B CN112752241B CN201911049240.XA CN201911049240A CN112752241B CN 112752241 B CN112752241 B CN 112752241B CN 201911049240 A CN201911049240 A CN 201911049240A CN 112752241 B CN112752241 B CN 112752241B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The application discloses a method and a device for switching a terminal coverage mode, wherein the method comprises the following steps: the terminal carries out real-time monitoring and statistics on preset transmission state parameters, and determines whether the coverage mode needs to be switched currently or not according to the transmission state parameters and a rate estimation condition corresponding to a preset current coverage mode; the transmission state parameters comprise selected MCS orders, repetition times, error rate and Reference Signal Received Power (RSRP); and when the coverage mode needs to be switched, the terminal executes corresponding coverage mode switching operation. By applying the technical scheme disclosed by the application, the problem of speed reduction caused by unreasonable switching time of the coverage mode can be solved.
Description
Technical Field
The present application relates to the field of Communications technologies, and in particular, to a method and an apparatus for switching overlay modes of an Enhanced Machine Type Communications (eMTC) terminal.
Background
The Internet of Things (IoT) is an important component of future information technology development, and is mainly technically characterized in that objects are connected with a network through a communication technology, so that an intelligent network with man-machine interconnection and object interconnection is realized. The protocol 3GPP R13 evolves based on LTE aiming at the characteristics of the Internet of things services, and an eMTC technology specially used for the Internet of things is designed. The eMTC has the characteristics of wide coverage (15 dB coverage enhancement relative to LTE), low cost, low power consumption and support of mass connection, wherein the wide coverage of the eMTC is realized by technologies such as repeated transmission of a plurality of continuous subframes and frequency hopping, and the eMTC is suitable for industrial scenes needing deep coverage, such as basements, well lids, remote areas and the like.
The modeA mode and the modeB mode are two overlay modes of the eMTC terminal. In the modeA mode, the number of repetitions is small and the rate is high, typically for medium-near points, while in the modeB mode the number of repetitions is large and the rate is high, typically for far points or deep coverage far points.
The inventors discovered in the course of implementing the present invention that the existing switching scheme between modeA and modeB has a problem of reducing the transmission rate. The specific reason is analyzed as follows:
currently, switching between the modeA mode and the modeB mode is triggered according to the current Reference Signal Received Power (RSRP) of the terminal, and if the RSRP of the terminal is lower than a certain threshold, switching to the modeB mode is performed, and if the RSRP of the terminal is higher than a certain threshold, switching to the modeA mode is performed.
Since the wireless environment is dynamically changed in practical application, if the RSRP threshold is not set reasonably, it may cause the mode a and mode b to switch unreasonably, for example, if the channel quality is good, switching to mode b may cause the rate to be too low due to too many repetition times, and if the channel quality is poor, switching to mode a may cause the rate to be too low due to too high the current error rate.
Disclosure of Invention
In view of the above, a main object of the present invention is to provide a method and an apparatus for switching overlay modes of an eMTC terminal, which can solve a problem of rate reduction caused by unreasonable overlay mode switching timing.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a switching method of a terminal coverage mode comprises the following steps:
the terminal carries out real-time monitoring and statistics on preset transmission state parameters, and determines whether the coverage mode needs to be switched currently or not according to the transmission state parameters and a rate estimation condition corresponding to a preset current coverage mode; the transmission state parameters comprise selected MCS orders, repetition times, error rate and Reference Signal Received Power (RSRP);
and when the terminal determines that the coverage mode needs to be switched, the terminal executes corresponding coverage mode switching operation.
Preferably, when the terminal adopts the first coverage mode, the determining whether it is currently necessary to switch the coverage mode includes:
when the terminal determines that the rate pre-estimation condition corresponding to the first coverage mode is met currently according to the current transmission state parameters, the pre-estimated rate corresponding to the first coverage mode is calculated according to the current selected MCS order, the repetition number and the bit error rate, and the pre-estimated rate corresponding to the current selected MCS order and the repetition number R is calculated according to the current selected MCS order and the repetition number R i Calculating the estimated rate corresponding to the second coverage mode according to the target bit error rate of the second coverage mode; wherein the maximum number of repeated transmissions M of a single data packet in the first overlay mode is smaller than the maximum number of repeated transmissions N of a single data packet in the second overlay mode; the number of repetitions R i The preset repetition times are larger than the current repetition times and the gear is the minimum repetition times;
if the estimated rate corresponding to the first coverage mode is smaller than the estimated rate corresponding to the second coverage mode, determining that the second coverage mode needs to be switched to currently; otherwise, it is determined that switching of the overlay mode is not currently required.
Preferably, the rate estimation condition corresponding to the first coverage mode includes: the currently selected MCS order is 0 order, the current error rate is greater than a preset error rate threshold value, the current reference signal receiving power is greater than a preset reference signal receiving power threshold value, and the current repetition number is greater than or equal to M.
Preferably, when the terminal adopts the second coverage mode, the determining whether it is currently necessary to switch the coverage mode includes:
if the MCS order selected currently is not 0 order, determining that the switching to the first coverage mode is needed currently; the maximum repeated sending times M of a single data packet in the first coverage mode are smaller than the maximum repeated sending times N of the single data packet in the second coverage mode;
if the current selected MCS order is 0 order, judging whether the rate estimation condition corresponding to the second coverage mode is met according to the current transmission state parameter, if so, calculating the estimated rate corresponding to the second coverage mode according to the current selected MCS order, the repetition times and the error rate, and calculating the estimated rate corresponding to the first coverage mode according to the current selected MCS order, the maximum repeated sending times M and the target error rate of the first coverage mode;
if the estimated rate corresponding to the second coverage mode is smaller than the estimated rate corresponding to the first coverage mode, determining that the current coverage mode needs to be switched to the first coverage mode; otherwise, it is determined that switching of the overlay mode is not currently required.
Preferably, the rate estimation condition corresponding to the second coverage mode includes:
the current number of repetitions is equal to or greater than R j Or less than the difference between the N and a preset first adjustment coefficient offset 1; the number of repetitions R j The offset1 is greater than or equal to 0 for the preset repetition times which are greater than M and the minimum gear;
the current error rate is greater than the difference value between the preset error rate threshold and a preset second adjustment coefficient offset2, and the offset2 is greater than or equal to 0;
and the current reference signal received power is greater than the sum of a preset reference signal received power threshold and a preset third adjustment coefficient offset3, wherein the offset3 is greater than or equal to 0.
Preferably, the terminal performs the real-time monitoring and statistics according to a preset statistics period.
Preferably, the terminal is an enhanced machine type communication (eMTC) terminal; the first overlay mode is a modeA mode; the second overlay mode is a modeB mode.
A switching device of terminal coverage mode, which is arranged in a terminal, comprises: a processor to:
monitoring and counting preset transmission state parameters in real time, and determining whether the coverage mode needs to be switched currently according to the transmission state parameters and a rate estimation condition corresponding to a preset current coverage mode; the transmission state parameters comprise selected MCS orders, repetition times, error rate and Reference Signal Received Power (RSRP);
and when the coverage mode needs to be switched, the terminal executes corresponding coverage mode switching operation.
Preferably, the processor is specifically configured to: when the first coverage mode is adopted, determining whether the coverage mode needs to be switched currently comprises the following steps:
when determining that the rate pre-estimation condition corresponding to the first coverage mode is met currently according to the current transmission state parameters, calculating the pre-estimation rate corresponding to the first coverage mode according to the current selected MCS order, the repetition number and the bit error rate, and calculating the pre-estimation rate corresponding to the first coverage mode according to the current selected MCS order and the repetition number R i Calculating the estimated rate corresponding to the second coverage mode; wherein the maximum number of repeated transmissions M of a single data packet in the first overlay mode is smaller than the maximum number of repeated transmissions N of a single data packet in the second overlay mode; the number of repetitions R i The preset repetition times are larger than the current repetition times and the gear is the minimum repetition times;
if the estimated rate corresponding to the first coverage mode is smaller than the estimated rate corresponding to the second coverage mode, determining that the current coverage mode needs to be switched to the second coverage mode; otherwise, it is determined that switching of the overlay mode is not currently required.
Preferably, the rate estimation condition corresponding to the first coverage mode includes: the currently selected MCS order is 0 order, the current error rate is greater than a preset error rate threshold value, the current reference signal receiving power is greater than a preset reference signal receiving power threshold value, and the current repetition number is greater than or equal to M.
Preferably, the processor is specifically configured to: when the second coverage mode is adopted, determining whether the coverage mode needs to be switched currently comprises the following steps:
if the MCS order selected currently is not 0 order, determining that the current mode needs to be switched to a first coverage mode; the maximum repeated sending times M of a single data packet in the first coverage mode are smaller than the maximum repeated sending times N of the single data packet in the second coverage mode;
if the current selected MCS order is 0 order, judging whether the rate estimation condition corresponding to the second coverage mode is met according to the current transmission state parameter, if so, calculating the estimated rate corresponding to the second coverage mode according to the current selected MCS order, the repetition times and the error rate, and calculating the estimated rate corresponding to the first coverage mode according to the current selected MCS order, the maximum repeated sending times M and the target error rate of the first coverage mode;
if the estimated rate corresponding to the second coverage mode is smaller than the estimated rate corresponding to the first coverage mode, determining that the current coverage mode needs to be switched to the first coverage mode; otherwise, determining that the coverage mode does not need to be switched currently.
Preferably, the rate estimation condition corresponding to the second coverage mode includes:
the current number of repetitions is equal to or greater than the number of repetitions R j Or less than the difference between the N and a preset first adjustment coefficient offset 1; the number of repetitions R j The offset1 is greater than or equal to 0 for the preset repetition times which are greater than M and the minimum gear;
the current error rate is greater than the difference value between the preset error rate threshold and a preset second adjustment coefficient offset2, and the offset2 is greater than or equal to 0;
and the current reference signal received power is greater than the sum of the preset reference signal received power threshold and a preset third adjustment coefficient offset3, wherein the offset3 is greater than or equal to 0.
Preferably, the terminal performs the real-time monitoring and statistics according to a preset statistics period.
Preferably, the terminal is an enhanced machine type communication (eMTC) terminal; the first overlay mode is a modeA mode; the second overlay mode is a modeB mode.
The present application also discloses a non-transitory computer-readable storage medium storing instructions that, when executed by a processor, cause the processor to perform the steps of the method for switching of a terminal coverage mode as described above.
The application also discloses an electronic device comprising the non-volatile computer-readable storage medium as described above, and the processor having access to the non-volatile computer-readable storage medium.
According to the technical scheme, the coverage mode switching method and the coverage mode switching device for the eMTC terminal, provided by the application, determine the trigger time for switching the coverage mode according to the transmission state parameters which are monitored and counted in real time, including the selected MCS order, the repetition times, the bit error rate, the Reference Signal Received Power (RSRP) and the preset rate estimation condition corresponding to the current coverage mode, so that the accuracy of the coverage mode switching time can be ensured, and the problem of rate reduction caused by simply triggering the coverage mode switching according to the RSRP is effectively solved.
Drawings
FIG. 1 is a schematic flow chart of a method according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below by referring to the accompanying drawings and examples.
Fig. 1 is a schematic method flow diagram of an embodiment of the present invention, and as shown in fig. 1, a method for switching a terminal coverage mode implemented by the embodiment mainly includes:
In this step, different from the existing scheme, real-time monitoring and statistics need to be performed on the selected MCS order, repetition number, error rate, and RSRP, and the timing for switching the coverage mode is determined according to these parameters and the rate estimation condition corresponding to the current coverage mode. Therefore, the accuracy of the coverage mode switching opportunity can be effectively improved, the problem that the switching opportunity is not appropriate when coverage mode switching is triggered only according to RSRP in the traditional method is avoided, and the problem of corresponding rate reduction can be further avoided.
The number of repetitions to be monitored in real time in this step is the number of repetitions of sending a single data packet.
Preferably, the terminal may periodically perform real-time monitoring and statistics on the transmission state parameters according to a preset statistics period, that is, the transmission state parameters are monitored and counted in real time in each statistics period, so as to accurately determine the timing of switching the coverage mode according to the parameters in real time.
In practical applications, the terminal may be an eMTC terminal, but is not limited thereto, and the terminal may be applicable as long as there is a need for switching coverage mode like the above.
In practical applications, the coverage mode adopted by the terminal will include a first coverage mode and a second coverage mode. Wherein the maximum number of repeated transmissions M of a single data packet in the first overlay mode is smaller than the maximum number of repeated transmissions N of a single data packet in the second overlay mode.
When the terminal is an eMTC terminal, the first coverage mode is a modeA mode correspondingly; the second overlay mode is a modeB mode.
Preferably, when the terminal adopts the first coverage mode, the following method may be adopted to determine whether the coverage mode needs to be switched currently:
when the terminal determines that the rate estimation condition corresponding to the first coverage mode is currently met according to the current transmission state parameters, the terminal calculates the first coverage mode according to the current selected MCS order, the repetition times and the error rateThe estimated rate corresponding to the formula is determined according to the current MCS order and the repetition number R i Calculating the estimated rate corresponding to the second coverage mode; wherein the number of repetitions R i The preset repetition times are larger than the current repetition times and the gear is the minimum repetition times;
if the estimated rate corresponding to the first coverage mode is smaller than the estimated rate corresponding to the second coverage mode, determining that the current coverage mode needs to be switched to the second coverage mode; otherwise, it is determined that switching of the overlay mode is not currently required.
In the method, when the terminal determines that the rate estimation condition corresponding to the first coverage mode is currently satisfied according to the current transmission state parameter, it indicates that the current channel quality is poor, and switching to the second coverage mode may be considered, and the transmission quality is guaranteed by increasing the number of repetitions.
Here, when the estimated rate corresponding to the first coverage mode is smaller than the estimated rate corresponding to the second coverage mode, it is described that the transmission rate can be increased by switching to the second coverage mode, and thus, the corresponding switching can be triggered. Therefore, the switching of the coverage mode is triggered only when the transmission rate after switching is judged to be improved, so that the accuracy of the switching time of the coverage mode can be ensured, and the reduction of the transmission rate is avoided.
The specific calculation method of the estimated rate in the above method is known to those skilled in the art, and will not be described herein.
Preferably, in order to improve the accuracy of determining the switching time of the coverage mode, the rate estimation condition corresponding to the first coverage mode may include the following, and the calculation of the estimated rate is triggered only when the following conditions are satisfied:
the currently selected MCS order is 0 order, the current error rate is greater than a preset error rate threshold, the current reference signal receiving power is greater than a preset reference signal receiving power threshold, and the current repetition number is greater than or equal to M.
It should be noted that, when the selected MCS order is 0 order, it is indicated that the transmission quality cannot be improved by decreasing the MCS order at this time, and the transmission quality can only be improved by increasing the number of repetitions, so that it is considered to switch to the coverage mode allowing more repetitions, that is, the second coverage mode at this time.
The bit error rate threshold and the reference signal received power threshold may be configured by those skilled in the art through an operation interface of the terminal or the base station. The range of the bit error rate threshold may be [0,100% ], and preferably may be set to 30%, and the range of the reference signal received power threshold may be [ -90 to-140 ] ]dbm, and preferably may be set to-125 dBm.
Preferably, when the terminal adopts the second coverage mode, the following method can be adopted to determine whether the coverage mode needs to be switched currently:
if the MCS order selected currently is not 0 order, determining that the current mode needs to be switched to a first coverage mode; the maximum repeated sending times M of a single data packet in the first coverage mode are smaller than the maximum repeated sending times N of the single data packet in the second coverage mode;
if the order of the MCS currently selected is 0 order, judging whether a rate pre-estimation condition corresponding to the second coverage mode is met or not according to the current transmission state parameter, if so, calculating a pre-estimation rate corresponding to the second coverage mode according to the current selected MCS order, the repetition times and the bit error rate, and calculating a pre-estimation rate corresponding to the first coverage mode according to the current selected MCS order, the maximum repeated transmission times M and the target bit error rate of the first coverage mode;
if the estimated rate corresponding to the second coverage mode is smaller than the estimated rate corresponding to the first coverage mode, determining that the current coverage mode needs to be switched to the first coverage mode; otherwise, it is determined that switching of the overlay mode is not currently required.
It should be noted that, if the MCS order currently selected is not 0 order, it is indicated that the transmission quality can be improved by decreasing the MCS order at this time, and therefore, the coverage mode allowing a smaller number of repetitions, that is, the first coverage mode, can be directly switched to. When the MCS order is 0 order, it needs to further determine whether to trigger the switching of the coverage mode based on the estimated rates of the two coverage modes, so as to ensure that the switched rate is not reduced.
Preferably, the rate estimation condition corresponding to the second coverage mode includes:
the current number of repetitions is equal to or greater than the number of repetitions R j Or less than the difference between the N and a preset first adjustment coefficient offset 1; the number of repetitions R j The offset1 is greater than or equal to 0 for the preset repetition times which are greater than M and the minimum gear;
the current error rate is greater than the difference value between the preset error rate threshold and a preset second adjustment coefficient offset2, and the offset2 is greater than or equal to 0;
and the current reference signal received power is greater than the sum of a preset reference signal received power threshold and a preset third adjustment coefficient offset3, wherein the offset3 is greater than or equal to 0.
In practical applications, a person skilled in the art may set the first adjustment coefficient, the second adjustment coefficient, and the third adjustment coefficient according to actual needs.
And 102, when the coverage mode needs to be switched, the terminal executes corresponding coverage mode switching operation.
In this step, if the first overlay mode is currently adopted, the operation of switching to the second overlay mode needs to be executed; if the second overlay mode is currently employed, an operation of switching to the first overlay mode needs to be performed.
Corresponding to the above method embodiment, the present application further provides a device for switching a coverage mode of a terminal, where the device is disposed in the terminal and includes: a processor to:
monitoring and counting preset transmission state parameters in real time, and determining whether the coverage mode needs to be switched currently according to the transmission state parameters and a rate estimation condition corresponding to a preset current coverage mode; the transmission state parameters comprise selected MCS orders, repetition times, error rate and Reference Signal Received Power (RSRP);
and when the coverage mode needs to be switched, the terminal executes corresponding coverage mode switching operation.
Preferably, the processor is specifically configured to: when the first coverage mode is adopted, determining whether the coverage mode needs to be switched currently comprises the following steps:
when the rate pre-estimation condition corresponding to the first coverage mode is determined to be met currently according to the current transmission state parameters, calculating the pre-estimated rate corresponding to the first coverage mode according to the current selected MCS order, the repetition number and the error rate, and calculating the pre-estimated rate corresponding to the first coverage mode according to the current selected MCS order and the repetition number R i Calculating the estimated rate corresponding to the second coverage mode; wherein the maximum number of repeated transmissions M of a single data packet in the first overlay mode is smaller than the maximum number of repeated transmissions N of a single data packet in the second overlay mode; the number of repetitions R i The preset repetition times are larger than the current repetition times and the gear is the minimum repetition times;
if the estimated rate corresponding to the first coverage mode is smaller than the estimated rate corresponding to the second coverage mode, determining that the current coverage mode needs to be switched to the second coverage mode; otherwise, it is determined that switching of the overlay mode is not currently required.
Preferably, the rate estimation condition corresponding to the first coverage mode includes: the currently selected MCS order is 0 order, the current error rate is greater than a preset error rate threshold, the current reference signal receiving power is greater than a preset reference signal receiving power threshold, and the current repetition number is greater than or equal to M.
Preferably, the processor is specifically configured to: when the second coverage mode is adopted, determining whether the coverage mode needs to be switched currently comprises the following steps:
if the MCS order selected currently is not 0 order, determining that the current mode needs to be switched to a first coverage mode; the maximum repeated sending times M of a single data packet in the first coverage mode are smaller than the maximum repeated sending times N of the single data packet in the second coverage mode;
if the current selected MCS order is 0 order, judging whether the rate estimation condition corresponding to the second coverage mode is met according to the current transmission state parameter, if so, calculating the estimated rate corresponding to the second coverage mode according to the current selected MCS order, the repetition times and the error rate, and calculating the estimated rate corresponding to the first coverage mode according to the current selected MCS order, the maximum repeated sending times M and the target error rate of the first coverage mode;
if the estimated rate corresponding to the second coverage mode is smaller than the estimated rate corresponding to the first coverage mode, determining that the current coverage mode needs to be switched to the first coverage mode; otherwise, determining that the coverage mode does not need to be switched currently.
Preferably, the rate estimation condition corresponding to the second coverage mode includes:
the current number of repetitions is equal to or greater than R j Or less than the difference between the N and a preset first adjustment coefficient offset 1; the number of repetitions R j The offset1 is greater than or equal to 0 for the preset repetition times which are greater than M and the minimum gear;
the current error rate is greater than the difference value between the preset error rate threshold and a preset second adjustment coefficient offset2, and the offset2 is greater than or equal to 0;
and the current reference signal received power is greater than the sum of a preset reference signal received power threshold and a preset third adjustment coefficient offset3, wherein the offset3 is greater than or equal to 0.
Preferably, the terminal performs the real-time monitoring and statistics according to a preset statistics period.
Preferably, the terminal is an enhanced machine type communication (eMTC) terminal; the first overlay mode is a modeA mode; the second overlay mode is a modeB mode.
It can be seen from the foregoing embodiments that, according to the transmission state parameters monitored and counted in real time, including the selected MCS order, the number of repetitions, the bit error rate, the reference signal received power RSRP, and the preset rate estimation condition corresponding to the current coverage mode, the coverage mode switching method and apparatus provided in the embodiments of the present application determine the trigger time for switching the coverage mode, so that the accuracy of the coverage mode switching time can be ensured, and the problem of rate reduction caused by simply triggering the coverage mode switching according to the RSRP is effectively solved.
Furthermore, the present application also provides a non-transitory computer-readable storage medium storing instructions that, when executed by a processor, cause the processor to perform the steps of the method for switching terminal coverage mode as described above.
Further, the present application provides an electronic device comprising the non-volatile computer-readable storage medium as described above, and the processor having access to the non-volatile computer-readable storage medium.
The above description is only a preferred embodiment of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (14)
1. A method for switching a terminal coverage mode is characterized by comprising the following steps:
the terminal carries out real-time monitoring and statistics on preset transmission state parameters, and determines whether the coverage mode needs to be switched currently or not according to the transmission state parameters and a rate estimation condition corresponding to a preset current coverage mode; the transmission state parameters comprise selected MCS orders, repetition times, error rate and Reference Signal Received Power (RSRP);
when the coverage mode needs to be switched, the terminal executes corresponding coverage mode switching operation;
the coverage mode adopted by the terminal comprises a first coverage mode and a second coverage mode;
when the terminal adopts a first coverage mode, the determining whether the coverage mode needs to be switched currently comprises:
when the terminal determines that the rate pre-estimation condition corresponding to the first coverage mode is currently met according to the current transmission state parameters, the pre-estimated rate corresponding to the first coverage mode is calculated according to the current selected MCS order, the repetition number and the error rate, and the pre-estimated rate corresponding to the current selected MCS order and the repetition number R is calculated according to the current selected MCS order and the repetition number R i Calculating the estimated rate corresponding to the second coverage mode according to the target bit error rate of the second coverage mode; wherein the maximum number of repeated transmissions M of a single data packet in the first overlay mode is smaller than the maximum number of repeated transmissions N of a single data packet in the second overlay mode; the number of repetitions R i The preset repetition times are larger than the current repetition times and the gear is the minimum repetition times;
if the estimated rate corresponding to the first coverage mode is smaller than the estimated rate corresponding to the second coverage mode, determining that the current coverage mode needs to be switched to the second coverage mode; otherwise, it is determined that switching of the overlay mode is not currently required.
2. The method of claim 1, wherein: the rate estimation condition corresponding to the first coverage mode comprises: the currently selected MCS order is 0 order, the current error rate is greater than a preset error rate threshold value, the current reference signal receiving power is greater than a preset reference signal receiving power threshold value, and the current repetition number is greater than or equal to M.
3. The method of claim 1, wherein: when the terminal adopts a second coverage mode, the determining whether the coverage mode needs to be switched currently comprises:
if the MCS order selected currently is not 0 order, determining that the switching to the first coverage mode is needed currently; the maximum repeated sending times M of a single data packet in the first coverage mode are smaller than the maximum repeated sending times N of the single data packet in the second coverage mode;
if the order of the MCS currently selected is 0 order, judging whether a rate pre-estimation condition corresponding to the second coverage mode is met or not according to the current transmission state parameter, if so, calculating a pre-estimation rate corresponding to the second coverage mode according to the current selected MCS order, the repetition times and the bit error rate, and calculating a pre-estimation rate corresponding to the first coverage mode according to the current selected MCS order, the maximum repeated transmission times M and the target bit error rate of the first coverage mode;
if the estimated rate corresponding to the second coverage mode is smaller than the estimated rate corresponding to the first coverage mode, determining that the current coverage mode needs to be switched to the first coverage mode; otherwise, it is determined that switching of the overlay mode is not currently required.
4. The method of claim 3, wherein: the rate estimation condition corresponding to the second coverage mode comprises:
the current number of repetitions is equal to or greater than the number of repetitions R j Or less than the difference between the N and a preset first adjustment coefficient offset 1; the number of repetitions R j The offset1 is greater than or equal to 0 for the preset repetition times which are greater than M and the minimum gear;
the current error rate is greater than the difference value between the preset error rate threshold and a preset second adjustment coefficient offset2, and the offset2 is greater than or equal to 0;
and the current reference signal received power is greater than the sum of the preset reference signal received power threshold and a preset third adjustment coefficient offset3, wherein the offset3 is greater than or equal to 0.
5. The method of claim 1, wherein:
and the terminal carries out the real-time monitoring and statistics according to a preset statistics period.
6. The method of any of claims 1 to 4, wherein: the terminal is an enhanced machine type communication (eMTC) terminal; the first overlay mode is a modeA mode; the second overlay mode is a modeB mode.
7. A switching device of terminal coverage mode, which is arranged in a terminal, comprises: a processor to:
monitoring and counting preset transmission state parameters in real time, and determining whether the coverage mode needs to be switched currently according to the transmission state parameters and a rate estimation condition corresponding to a preset current coverage mode; the transmission state parameters comprise selected MCS orders, repetition times, error rate and Reference Signal Received Power (RSRP);
when the coverage mode needs to be switched, the terminal executes corresponding coverage mode switching operation;
the coverage mode adopted by the terminal comprises a first coverage mode and a second coverage mode;
when the first coverage mode is adopted, determining whether the coverage mode needs to be switched currently comprises the following steps:
when the rate pre-estimation condition corresponding to the first coverage mode is determined to be met currently according to the current transmission state parameters, calculating the pre-estimated rate corresponding to the first coverage mode according to the current selected MCS order, the repetition number and the error rate, and calculating the pre-estimated rate corresponding to the first coverage mode according to the current selected MCS order and the repetition number R i Calculating the estimated rate corresponding to the second coverage mode according to the target bit error rate of the second coverage mode; wherein the maximum number of repeated transmissions M of a single data packet in the first overlay mode is smaller than the maximum number of repeated transmissions N of a single data packet in the second overlay mode; the number of repetitions R i The preset repetition times are larger than the current repetition times and the gear is the minimum repetition times;
if the estimated rate corresponding to the first coverage mode is smaller than the estimated rate corresponding to the second coverage mode, determining that the second coverage mode needs to be switched to currently; otherwise, it is determined that switching of the overlay mode is not currently required.
8. The apparatus of claim 7, wherein: the rate estimation condition corresponding to the first coverage mode comprises: the currently selected MCS order is 0 order, the current error rate is greater than a preset error rate threshold value, the current reference signal receiving power is greater than a preset reference signal receiving power threshold value, and the current repetition number is greater than or equal to M.
9. The apparatus of claim 7, wherein the processor is specifically configured to: when the second coverage mode is adopted, determining whether the coverage mode needs to be switched currently comprises the following steps:
if the MCS order selected currently is not 0 order, determining that the switching to the first coverage mode is needed currently; the maximum repeated sending times M of a single data packet in the first coverage mode are smaller than the maximum repeated sending times N of the single data packet in the second coverage mode;
if the current selected MCS order is 0 order, judging whether the rate estimation condition corresponding to the second coverage mode is met according to the current transmission state parameter, if so, calculating the estimated rate corresponding to the second coverage mode according to the current selected MCS order, the repetition times and the error rate, and calculating the estimated rate corresponding to the first coverage mode according to the current selected MCS order, the maximum repeated sending times M and the target error rate of the first coverage mode;
if the estimated rate corresponding to the second coverage mode is smaller than the estimated rate corresponding to the first coverage mode, determining that the current coverage mode needs to be switched to the first coverage mode; otherwise, determining that the coverage mode does not need to be switched currently.
10. The apparatus as claimed in claim 9, wherein the rate estimation condition for the second coverage mode comprises:
the current number of repetitions is equal to or greater than the number of repetitions R j Or less than the difference between the N and a preset first adjustment coefficient offset 1; the number of repetitions R j The offset1 is greater than or equal to 0 for the preset repetition times which are greater than M and the minimum gear;
the current error rate is greater than the difference value between the preset error rate threshold and a preset second adjustment coefficient offset2, and the offset2 is greater than or equal to 0;
and the current reference signal received power is greater than the sum of the preset reference signal received power threshold and a preset third adjustment coefficient offset3, wherein the offset3 is greater than or equal to 0.
11. The apparatus of claim 7, wherein:
and the terminal carries out the real-time monitoring and statistics according to a preset statistics period.
12. The apparatus of any of claims 7 to 10, wherein: the terminal is an enhanced machine type communication (eMTC) terminal; the first overlay mode is a modeA mode; the second overlay mode is a modeB mode.
13. A non-transitory computer readable storage medium storing instructions which, when executed by a processor, cause the processor to perform the steps of the method of switching of terminal coverage mode as claimed in any one of claims 1 to 6.
14. An electronic device comprising the non-volatile computer-readable storage medium of claim 13, and the processor having access to the non-volatile computer-readable storage medium.
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