CN115361691A - Channel parameter adjusting method, electronic equipment and storage medium - Google Patents
Channel parameter adjusting method, electronic equipment and storage medium Download PDFInfo
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Abstract
The application relates to the technical field of communication of the Internet of things, and discloses a channel parameter adjusting method, electronic equipment and a storage medium. The channel parameter adjusting method comprises the following steps: acquiring link quality during data transmission with a terminal, and determining whether to adjust a first coverage enhancement level of the terminal to a second coverage enhancement level according to the link quality; if the first coverage enhancement grade of the terminal is determined to be adjusted to the second coverage enhancement grade, the second coverage enhancement grade is sent to the terminal so that the terminal can adjust the first channel parameter of the terminal to the channel parameter corresponding to the second coverage enhancement grade; the terminal has a plurality of coverage enhancement grades, and the terminal stores channel parameters corresponding to each coverage enhancement grade in advance; synchronously adjusting a second channel parameter of the base station to a channel parameter corresponding to a second coverage enhancement level; the base station also prestores channel parameters corresponding to each coverage enhancement level so as to realize flexible adjustment of the channel configuration parameters.
Description
Technical Field
The present application relates to the field of communications technologies for internet of things, and in particular, to a channel parameter adjusting method, an electronic device, and a storage medium.
Background
The wireless terminal is characterized in that the wireless terminal is mobile in a wireless mode, and the terminal transmits information by means of a communication network established by a communication operator in a wireless state, so that various communication requirements among the terminals are met. The terminal performs data interaction by means of an operator network, and needs to reside in a proper cell and request to access the network when executing a specific service. The bit error rate of the terminal accessing the network for data transmission is strongly correlated with the network signal strength, and the weaker the signal is, the easier the transmission error is, and even the transmission is not successful. For example, the mobile phone is in a place with poor signal coverage, such as a garage, an elevator and the like, and service interruption easily occurs, and compared with the traditional mobile phone, the wireless terminal of the internet of things has a higher probability of being in a severe environment, and for example, equipment such as an intelligent electric meter, a water meter and the like can be installed in a closed basement environment or even buried underground. To address these pain point requirements of Internet of Things terminals, the Narrow Band Internet of Things (NB-IoT) protocol introduces enhanced coverage functionality.
However, in order to cope with different wireless channel conditions, NB-IoT defines a plurality of different Coverage enhancement levels (CE levels), and the channel configuration parameters of NB-IoT are fixed, cannot adapt to the variation of wireless signal strength, and are not favorable for data transmission of the terminal.
Disclosure of Invention
The application aims to provide a channel parameter adjusting method, an electronic device and a storage medium, which can realize flexible adjustment of channel configuration parameters and are beneficial to improving the data transmission quality of a terminal, thereby improving the terminal user experience in a mobile scene.
In order to solve the above technical problem, the present application provides a channel parameter adjusting method, which is applied to a base station, and includes the following steps: acquiring link quality during data transmission with a terminal, and determining whether to adjust a first coverage enhancement level of the terminal to a second coverage enhancement level according to the link quality; if the first coverage enhancement grade of the terminal is determined to be adjusted to a second coverage enhancement grade, the second coverage enhancement grade is sent to the terminal so that the terminal can adjust the first channel parameter of the terminal to a channel parameter corresponding to the second coverage enhancement grade; the terminal should have a plurality of coverage enhancement grades, and a channel parameter corresponding to each coverage enhancement grade is stored in the terminal in advance; synchronously adjusting a second channel parameter of the base station to a channel parameter corresponding to the second coverage enhancement level; wherein the base station also stores in advance the channel parameters corresponding to each of the coverage enhancement levels.
In order to solve the above technical problem, the present application further provides a channel parameter adjusting method, applied to a terminal, including: receiving a second coverage enhancement grade sent by the base station; the current coverage enhancement grade of the terminal is a first coverage enhancement grade; adjusting a first channel parameter of the terminal to a channel parameter corresponding to the second coverage enhancement level; the terminal should have a plurality of coverage enhancement levels, and the terminal stores channel parameters corresponding to each coverage enhancement level in advance.
In order to solve the above technical problem, the present application further provides an electronic device, including: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the above-described channel parameter adjustment method applied to the base station or to perform the above-described channel parameter adjustment method applied to the terminal.
In order to solve the above technical problem, the present application further provides a computer-readable storage medium storing a computer program, which when executed by a processor, implements the above channel parameter adjusting method applied to a base station, or implements the above channel parameter adjusting method applied to a terminal.
Compared with the prior art, the method and the device have the advantages that whether the first coverage enhancement grade of the terminal is adjusted to the second coverage enhancement grade or not can be determined according to the link quality when data transmission is carried out with the terminal, if the first coverage enhancement grade of the terminal is determined to be adjusted to the second coverage enhancement grade, the adjusted second coverage enhancement grade is sent to the terminal, the terminal has a plurality of coverage enhancement grades, channel parameters corresponding to each coverage enhancement grade are stored in advance, the current first channel parameters of the terminal are the channel parameters corresponding to the first coverage enhancement grade, and therefore after the terminal receives the second coverage enhancement grade, the first channel parameters can be adjusted to the parameters corresponding to the second coverage enhancement grade, and meanwhile, the channel parameters corresponding to each coverage enhancement grade are also stored in the base station, so that the current second channel parameters of the base station are synchronously adjusted to the channel parameters corresponding to the second coverage enhancement grade. The base station can detect whether the coverage enhancement grade of the terminal needs to be adjusted or not, and under the condition that the coverage enhancement grade needs to be adjusted, the base station and the terminal can synchronously adjust respective channel parameters to the channel parameters corresponding to the adjusted coverage enhancement grade, so that the channel parameters of the terminal and the base station are more matched with the signal intensity of the current wireless network environment, the flexible adjustment of the channel parameters of the terminal and the base station is realized, the condition that the terminal data transmission quality is reduced due to the fact that the channel parameters of the base station and the terminal are fixed and unchanged and the wireless current network environment is not matched is avoided, the data transmission quality of the terminal is favorably improved, and the terminal user experience under a mobile scene is improved.
In addition, the obtaining of the link quality during data transmission with the terminal and determining whether to adjust the first coverage enhancement level of the terminal to the second coverage enhancement level according to the link quality includes: acquiring data retransmission rate and data block error rate when data transmission is carried out with the terminal; detecting whether the data retransmission rate is greater than a first preset threshold and the data block error rate is greater than a second preset threshold; if the data retransmission rate is greater than the first preset threshold and the data block error rate is greater than the second preset threshold, determining to adjust the first coverage enhancement level of the terminal to a second coverage enhancement level; wherein the first coverage enhancement level is less than the second coverage enhancement level. In the application, if the base station detects that the data retransmission rate during data transmission with the terminal is greater than a first preset threshold and the data block error rate is greater than a second preset threshold, it indicates that the current link quality is poor and the coverage enhancement level needs to be adjusted to a second coverage enhancement level greater than the first coverage enhancement level.
In addition, the obtaining of the link quality during data transmission with the terminal and determining whether to adjust the first coverage enhancement level of the terminal to the second coverage enhancement level according to the link quality includes: acquiring data retransmission rate and data block error rate when data transmission is carried out with the terminal; detecting whether the data retransmission rate and the data block error rate are both smaller than a third preset threshold value; if the data retransmission rate and the data block error rate are both smaller than the third preset threshold, determining to adjust the first coverage enhancement level of the terminal to a second coverage enhancement level; wherein the first coverage enhancement level is greater than the second coverage enhancement level. In the application, if the base station detects that the data retransmission rate and the data block error rate during data transmission with the terminal are both smaller than a third preset threshold, it indicates that the current link quality is high, and the coverage enhancement level can be adjusted to a second coverage enhancement level smaller than the first coverage enhancement level.
Additionally, the determining to adjust the first coverage enhancement level of the terminal to a second coverage enhancement level includes: waiting for a first preset time length, and detecting whether the data retransmission rate is greater than the first preset threshold value and whether the data block error rate is greater than the second preset threshold value after the first preset time length; if the data retransmission rate is detected to be greater than the first preset threshold value again and the data block error rate is detected to be greater than the second preset threshold value, the first coverage enhancement level of the terminal is adjusted to be a second coverage enhancement level. In the method and the device, if the data retransmission rate is detected to be greater than the first preset threshold value and the data block error rate is detected to be greater than the second preset threshold value after waiting for the first preset duration, the current link quality can be detected more accurately, and the second coverage enhancement level with the coverage enhancement level adjusted to be greater than the first coverage enhancement level is determined.
Additionally, the determining to adjust the first coverage enhancement level of the terminal to a second coverage enhancement level includes: waiting for a second preset time period, and detecting whether the data retransmission rate and the data block error rate are both smaller than a third preset threshold value again after the second preset time period; and if the data retransmission rate and the data block error rate are detected to be smaller than the third preset threshold value again, adjusting the first coverage enhancement level of the terminal to be a second coverage enhancement level. If the data retransmission rate and the data block error rate are detected to be smaller than the third preset threshold again after waiting for the second preset duration, the method and the device can detect that the quality of the current link is higher more accurately, and determine to adjust the coverage enhancement level to be the second coverage enhancement level smaller than the first coverage enhancement level.
Further, the synchronously adjusting the second channel parameter of the base station to the channel parameter corresponding to the second coverage enhancement level includes: respectively acquiring a detection period of the first coverage enhancement level and a detection period of the second coverage enhancement level; determining a target time for adjusting the second channel parameter according to the detection period of the first coverage enhancement level and the detection period of the second coverage enhancement level; and adjusting the second channel parameter to a channel parameter corresponding to the second coverage enhancement level at the target time. In the method, the base station determines the target time for adjusting the second channel parameter according to the detection period of the first coverage enhancement level and the detection period of the second coverage enhancement level, so that the second channel parameter can be more accurately adjusted to the channel parameter corresponding to the second coverage enhancement level.
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One or more embodiments are illustrated by way of example in the accompanying drawings which correspond to and are not to be construed as limiting the embodiments, in which elements having the same reference numeral designations represent like elements throughout, and in which the drawings are not to be construed as limiting in scale unless otherwise specified.
Fig. 1 is a flowchart of a channel parameter adjusting method according to an embodiment of the present application;
FIG. 2 is a first flowchart providing an implementation of step 101 according to an embodiment of the present application;
FIG. 3 is a flowchart II of an implementation step 101 provided according to an embodiment of the present application;
fig. 4 is a flowchart of a channel parameter adjustment method according to another embodiment of the present application;
fig. 5 is a schematic structural diagram of an electronic device according to another embodiment of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that in the various embodiments of the present application, numerous technical details are set forth in order to provide a better understanding of the present application. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments. The following embodiments are divided for convenience of description, and should not constitute any limitation to the specific implementation manner of the present application, and the embodiments may be mutually incorporated and referred to without contradiction.
In order to cope with different wireless channel conditions, NB-IoT defines a plurality of different Coverage enhancement levels (CE levels), and the channel configuration parameters of NB-IoT are fixed, cannot adapt to the variation of wireless signal strength, and are not favorable for data transmission of the terminal. The embodiment of the application can realize flexible adjustment of the channel configuration parameters, and is beneficial to improving the data transmission quality of the terminal, thereby improving the terminal user experience in a mobile scene.
One embodiment of the present application relates to a channel parameter adjusting method, which is applied to a base station. The specific process of the channel parameter adjusting method of this embodiment may be as shown in fig. 1, and includes:
The following describes the implementation details of the channel parameter adjustment method of the present embodiment in detail, and the following is only provided for the convenience of understanding and is not necessary for implementing the present embodiment.
In step 101, the terminal starts data transmission after establishing connection with the base station, and the base station detects the quality of the data link in real time to obtain the quality of the link when data transmission is performed with the terminal. Because the terminal should have a plurality of coverage enhancement grades, the terminal selects the coverage enhancement grade according to the signal intensity of the terminal, and therefore different coverage enhancement grades correspond to different channel link qualities. The base station acquires link quality when data transmission is carried out with the terminal: if the link quality is detected to be normal, the link is always in a normal state and is matched with the current coverage enhancement grade of the terminal, and the coverage enhancement grade does not need to be adjusted; if the detected link quality is lower or higher, which indicates that the link is degraded or better, the coverage enhancement level of the terminal needs to be increased or decreased, that is, the first coverage enhancement level of the terminal is adjusted to the second coverage enhancement level, so that the current coverage enhancement level of the terminal is matched with the channel link quality.
Wherein, defining how many coverage enhancement levels a terminal should have in an area is determined by the network side, that is, the network side determines the number of the coverage enhancement levels, and the NB-IoT network defines at most 3 coverage enhancement levels, which are: for example, the network side divides the terminal into 3 coverage enhancement levels according to the actual signal strength, and the coverage enhancement levels 0 to 2 respectively correspond to signal fading which can resist MCL of 144dB, 154dB and 164dB, specifically, the coverage enhancement level 0 corresponds to normal coverage, that is, corresponds to the case of the best channel condition, such as in a medium-high field environment; coverage enhancement level 2 corresponds to extreme coverage, i.e., to the worst case channel conditions, such as a very weak field environment or in a scenario approaching loss of synchronization.
It can be understood that the first coverage enhancement level is an initial coverage enhancement level of the terminal, after the terminal resides in the network, the strength of a received network signal is strong or weak, according to the difference of the signal strength, the terminal can select to use different coverage enhancement levels to access the network, so that the base station can know the signal state of the terminal through the coverage enhancement level selected by the terminal, and accordingly, the base station carries a dedicated resource matched with the current coverage level in the random access process for transceiving uplink and downlink data of the terminal, and the terminal always maintains the current dedicated configuration in the connection state. And the coverage enhancement grade selected by the terminal is the first coverage enhancement grade.
In step 102, the first coverage enhancement level and the second coverage enhancement level correspond to different wireless environments, and the configuration parameters of the required channel are different in different wireless environments. Therefore, in order to automatically adjust the channel configuration parameters according to the radio environment, if the base station determines to adjust the first coverage enhancement level of the terminal to the second coverage enhancement level, the base station transmits the adjusted second coverage enhancement level to the terminal. Since the terminal should have multiple coverage enhancement levels and the terminal stores the channel parameters corresponding to each coverage enhancement level in advance, the terminal can adjust the first channel parameter of the terminal to the channel parameter corresponding to the second coverage enhancement level.
The channel parameters corresponding to each coverage enhancement level pre-stored by the terminal are pre-sent to the terminal by the base station, and the specific issuing mode can be as follows: the terminal initiates a random access request to the base station, the random access request carries the current coverage enhancement grade, the base station returns a response message of successful random access to the terminal, and the response message carries channel parameters corresponding to each coverage enhancement grade of the terminal, so that the terminal and the base station adjust the respective channel parameters to the channel parameters corresponding to the current coverage enhancement grade. The base station may then perform a real-time detection of the link quality when performing data transmission with the terminal to determine whether to adjust the current coverage enhancement level of the terminal, i.e., perform step 101.
In a specific implementation, there are various ways for the base station to send the second coverage enhancement level to the terminal, and those skilled in the art can select the second coverage enhancement level according to actual needs. For example, the base station interacts with the terminal through signaling of the RRCL3 layer to send the second coverage enhancement level to the terminal, or a downlink data packet through the L2 layer carries the second coverage enhancement level. If the coverage enhancement level is 3 levels, the downlink data packet only needs to carry information of the increase or decrease of the coverage enhancement level, and the terminal is instructed to adjust the channel parameter, so that the coverage enhancement level information only needs to occupy one byte length, including 1bit of effective information, 1 represents the increase of the coverage enhancement level, and 0 represents the decrease of the coverage enhancement level, thereby avoiding resource waste.
The channel parameter adjusted by the terminal specifically refers to a parameter configured by a Narrowband Physical Downlink Control Channel (NPDCCH), that is, the terminal specifically adjusts the parameter of the NPDCCH channel to a channel parameter corresponding to the second coverage enhancement level. The NPDCCH channel parameters include: the terminal can adjust any one or any combination of the Rmax parameter, the G parameter and the Offset parameter, and a specific adjusting object can be issued by the base station. The base station may simultaneously carry, when sending the downlink data packet carrying the second coverage enhancement level to the terminal, the NPDCCH channel parameter for instructing the terminal to adjust in the data packet, for example, the downlink data packet carries the second coverage enhancement level, the Rmax parameter, and the G parameter, and is used to instruct the terminal to adjust the Rmax parameter and the G parameter to the channel parameter corresponding to the second coverage enhancement level.
In step 103, to ensure correct transmission of data, the base station may adjust the second channel parameter of the base station and the terminal to the channel parameter corresponding to the second coverage enhancement level synchronously, that is, the base station and the terminal may simultaneously adjust the respective initial channel parameters to the channel parameters corresponding to the second coverage enhancement level. It can be understood that the base station stores the channel parameters corresponding to each coverage enhancement level in advance, and the adjusted parameters are consistent with the terminal.
In one example, after sending the coverage enhancement level to the terminal, the base station respectively obtains a detection period of a first coverage enhancement level and a detection period of a second coverage enhancement level, and determines a target time for adjusting a second channel parameter according to the detection period of the first coverage enhancement level and the detection period of the second coverage enhancement level; at the target time, the second channel parameters are adjusted to channel parameters corresponding to the second coverage enhancement level. In order to avoid that channel parameters corresponding to the first coverage enhancement level and the second coverage enhancement level are configured to intersect when the second channel parameter is adjusted to the channel parameter corresponding to the second coverage enhancement level, which results in a failure in adjusting the channel parameter, in this embodiment, a target time for adjusting the second channel parameter is determined according to the detection period of the first coverage enhancement level and the detection period of the second coverage enhancement level, that is, the channel parameter is adjusted at the target time, so that the second channel parameter can be adjusted to the channel parameter corresponding to the second coverage enhancement level more accurately.
In a specific implementation, the method for determining the target time comprises the following steps: calculating a first coverage enhancement level detection period according to the Rmax parameter and the G parameter in the channel parameters corresponding to the first coverage enhancement level to obtain T1, and calculating a second coverage enhancement level detection period according to the Rmax parameter and the G parameter in the channel parameters corresponding to the second coverage enhancement level to obtain T2, wherein the calculation formula of the detection period is as follows: the calculation formula is as follows: t = Rmax G. And the base station compares the sizes of the T1 and the T2, selects a larger detection period as a target detection period, and takes the time after the next target detection period as a target time, wherein the target time is specifically the boundary time of the next target detection period, so that the second channel parameter is adjusted to the channel parameter corresponding to the second coverage enhancement level at the target time. For example, T1=8ms, T2= 1696s, i.e. T2 is greater than T1, the second channel parameter is adjusted immediately after the next T2.
In one example, after the base station adjusts the second channel parameter to the channel parameter corresponding to the second coverage enhancement level in synchronization with the terminal, the terminal may perform decoding search using the adjusted coverage enhancement level, that is, the NPDCCH channel parameter corresponding to the second coverage enhancement level.
In the related art, since the resource configuration of the coverage enhancement level is determined by negotiation between the terminal and the base station in the initial random access process of the terminal, once the resource configuration is determined, the configuration parameters (Rmax, G, offset) of the NPDCCH are always kept unchanged after the terminal enters the connected state. If the time of the terminal in the RRC connection state is short, the signal of the terminal does not fluctuate too much, which is reasonable, but when the duration of the terminal in the RRC connection state is long, the signal of the terminal may fluctuate greatly, and a typical scenario is that when the terminal is in a mobile state, such as a Trace-type terminal scenario, the signal may fluctuate to a large extent, and the change of the signal field strength cannot be adapted by using a set of fixed NPDCCH configuration parameters.
In this embodiment, by obtaining the link quality when performing data transmission with the terminal, it may be determined whether to adjust the first coverage enhancement level of the terminal to the second coverage enhancement level according to the link quality, and if it is determined that the first coverage enhancement level of the terminal is adjusted to the second coverage enhancement level, the adjusted second coverage enhancement level is sent to the terminal. The base station can detect whether the coverage enhancement grade of the terminal needs to be adjusted or not, and under the condition that the coverage enhancement grade needs to be adjusted, the base station and the terminal can synchronously adjust respective channel parameters to the channel parameters corresponding to the adjusted coverage enhancement grade, so that the channel parameters of the terminal and the base station are more matched with the signal intensity of the current wireless network environment, the flexible adjustment of the channel parameters of the terminal and the base station is realized, the condition that the terminal data transmission quality is reduced due to the fact that the channel parameters of the base station and the terminal are fixed and unchanged and the wireless current network environment is not matched is avoided, the data transmission quality of the terminal is favorably improved, and the terminal user experience under a mobile scene is improved.
In an embodiment, a specific implementation procedure of obtaining link quality when performing data transmission with a terminal in step 101 may be as shown in fig. 2, and this embodiment specifically relates to a procedure of data link quality degradation and requiring to improve a coverage enhancement level of the terminal, and includes the following steps:
Specifically, when the terminal is in an RRC connected state, that is, when the terminal is connected to the base station and can perform data transmission, the base station obtains, in real time, a data retransmission rate R _ harqrept and a data block error rate BLER when performing data transmission with the terminal, where the data retransmission rate R _ harqrept and the data block error rate BLER reflect link quality during data transmission, and the obtained data is uplink data and/or downlink data. It can be understood that the data retransmission rate R _ harqrept is the number of times that Hybrid Automatic Repeat reQuest (HARQ) occurs to data divided by the total number of data transmissions, and the data block error rate BLER is the number of blocks in which data transmission fails divided by the total number of blocks in data transmission.
Specifically, the base station detects whether the obtained data retransmission rate R _ harqrept is greater than a first preset threshold, if so, it indicates that the quality of the current data link of the data is deteriorated, and the number of data retransmission times is increased, and simultaneously detects whether the block error rate BLER is greater than a second preset threshold, and if so, it indicates that the quality of the current data link is deteriorated, and the number of data transmission failures is increased. In this embodiment, the quality of the data link is determined by combining the data retransmission rate R _ harqrept and the data block error rate BLER, so that the quality of the current data link can be detected more accurately. If the data retransmission rate R _ harqrept is greater than the first preset threshold and the data block error rate BLER is greater than the second preset threshold, step 203 is performed, and if one of the data retransmission rate R _ harqrept and the data block error rate BLER does not satisfy the condition, the current data link quality is considered to be unchanged, and the coverage enhancement level does not need to be adjusted.
For example, it is detected whether R _ harqrept is greater than R _ threshold and BLER is greater than a%, and the values of R _ threshold and a may be set by those skilled in the art according to actual needs, that is, the tolerable degree of the link, R _ threshold may be 10%, and a may be 5.
Specifically, if the base station detects that the data retransmission rate R _ harqrept is greater than a first preset threshold and the data block error rate BLER is greater than a second preset threshold, for example, R _ harqrept is greater than 10% and the BLER is greater than 5%, it indicates that the quality of the current data link is deteriorated and the coverage enhancement level needs to be improved, that is, the first coverage enhancement level of the terminal is adjusted to the second coverage enhancement level.
In an example, in this embodiment, only the data block error rate when data transmission is performed with the terminal may be obtained, and whether the data block error rate is greater than a second preset threshold is detected, and if the data block error rate is greater than the second preset threshold, it is determined to raise the first coverage enhancement level of the terminal to the second coverage enhancement level.
In this embodiment, the base station obtains the data retransmission rate and the data block error rate when performing data transmission with the terminal, and detects whether the data retransmission rate is greater than a first preset threshold and the data block error rate is greater than a second preset threshold, and if it is detected that the data retransmission rate is greater than the first preset threshold and the data block error rate is greater than the second preset threshold, it indicates that the current link quality is poor, and the coverage enhancement level needs to be adjusted to a second coverage enhancement level that is greater than the first coverage enhancement level, that is, the base station can more accurately determine whether the coverage enhancement level of the terminal needs to be adjusted.
In one embodiment, after detecting that the data retransmission rate is greater than the first preset threshold and the data block error rate is greater than the second preset threshold, the base station does not directly determine to adjust the first coverage enhancement level of the terminal to the second coverage enhancement level, but waits for a first preset duration, and after the first preset duration, detects again whether the data retransmission rate is greater than the first preset threshold and the data block error rate is greater than the second preset threshold, and if detecting again that the data retransmission rate is greater than the first preset threshold and the data block error rate is greater than the second preset threshold, adjusts the first coverage enhancement level of the terminal to the second coverage enhancement level.
Specifically, a timer Tce _ level1 is pre-installed on the base station, a person skilled in the art may set a first preset time length of the timer according to actual needs, start the timer Tce _ level1 when detecting that the data retransmission rate is greater than a first preset threshold and the data block error rate is greater than a second preset threshold, and adjust the first coverage enhancement level of the terminal to the second coverage enhancement level if detecting that the data retransmission rate is greater than the first preset threshold and the data block error rate is greater than the second preset threshold again after the timer Tce _ level1 is stopped for the first preset time length.
In an example, the usage of the timer Tce _ level1 may also be: the method comprises the steps that a base station presets a first preset time length, when it is detected that the data retransmission rate is larger than a first preset threshold value and the data block error rate is larger than a second preset threshold value, the timer Tce _ level1 is started, when one of the data retransmission rate and the data block error rate does not meet preset conditions, namely the data retransmission rate is smaller than or equal to the first preset threshold value, and/or the data block error rate is smaller than or equal to the second preset threshold value, the timer Tce _ level1 is stopped, whether the actual timing time length of the timer Tce _ level1 is larger than the first preset time length or not is detected, if the actual timing time length is larger than the first preset time length, the timer Tce _ level1 is indicated to be overtime, and at the moment, the first coverage enhancement level of the terminal is determined to be adjusted to be a second coverage enhancement level.
Since the base station may be influenced by the outside when detecting the retransmission rate and/or the block error rate of the data during data transmission with the terminal, and it is detected that the retransmission rate of the data is greater than the first preset threshold and the block error rate of the data is greater than the second preset threshold, but after the influence is eliminated at the next time, it is detected that the retransmission rate and/or the block error rate of the data does not satisfy the preset condition, in order to ensure the accuracy of the detected data link quality, in this embodiment, after waiting for the first preset duration, it is detected again whether the retransmission rate of the data is greater than the first preset threshold and the block error rate of the data is greater than the second preset threshold, and it is possible to detect that the current link quality is poor more accurately, so as to determine to adjust the coverage enhancement level to be greater than the second coverage enhancement level of the first coverage enhancement level.
In an embodiment, a specific implementation procedure of obtaining link quality when performing data transmission with a terminal in step 101 may be as shown in fig. 3, and this embodiment specifically relates to a procedure that the data link quality becomes better and the coverage enhancement level of the terminal needs to be reduced, and includes the following steps:
Step 301 is substantially the same as step 201, and is not described herein again.
Specifically, the base station detects whether the obtained data retransmission rate R _ harqrept is smaller than a third preset threshold, if so, it indicates that the current data link quality of the data is good, and the data retransmission frequency is low, and simultaneously detects whether the data block error rate BLER is smaller than the third preset threshold, and if so, it indicates that the current data link quality is good, and the frequency of data transmission failure is low. In this embodiment, the quality of the data link is determined by combining the retransmission rate R _ harqrept and the block error rate BLER, so that the quality of the current data link can be detected more accurately. If the data retransmission rate R _ harqrept and the data block error rate BLER are both smaller than the third preset threshold, step 303 is performed, and if one of the data retransmission rate R _ harqrept and the data block error rate BLER does not satisfy the condition, it is determined that the current data link quality is unchanged, and the coverage enhancement level does not need to be adjusted.
For example, it is detected whether R _ harqrept and BLER are less than B%, and a value of B may be set by a person skilled in the art according to actual needs, that is, a tolerable degree of a link, and B may be set to 0.1.
Specifically, if the base station detects that both the data retransmission rate R _ harqrept and the data block error rate BLER are smaller than a third preset threshold, for example, both R _ harqrept and BLER are smaller than 0.1%, it indicates that the current data link quality number needs to be reduced in coverage enhancement level, that is, the first coverage enhancement level of the terminal is reduced to the second coverage enhancement level.
In this embodiment, the base station obtains the data retransmission rate and the data block error rate when performing data transmission with the terminal, and detects that both the data retransmission rate and the data block error rate are smaller than a third preset threshold, and if both the data retransmission rate and the data block error rate are smaller than the third preset threshold, it indicates that the current link quality is good, and the coverage enhancement level needs to be adjusted to a second coverage enhancement level smaller than the first coverage enhancement level, that is, the present application can more accurately determine whether the coverage enhancement level of the terminal needs to be adjusted.
In an embodiment, after detecting that both the data retransmission rate and the data block error rate are smaller than the third preset threshold, the base station does not directly determine to adjust the first coverage enhancement level of the terminal to the second coverage enhancement level, but waits for a second preset duration, and after the second preset duration, detects again whether both the data retransmission rate and the data block error rate are smaller than the third preset threshold, and if detecting again that both the data retransmission rate and the data block error rate are smaller than the third preset threshold, adjusts the first coverage enhancement level of the terminal to the second coverage enhancement level.
Specifically, a timer Tce _ level1 is pre-installed on the base station, where the timers in the foregoing may be the same, and a person skilled in the art may set a second preset duration of the timer according to actual needs, start the timer Tce _ level1 when detecting that both the data retransmission rate and the data block error rate are smaller than a third preset threshold, and adjust the first coverage enhancement level of the terminal to the second coverage enhancement level when detecting that both the data retransmission rate and the data block error rate are smaller than the third preset threshold after the timer Tce _ level1 stops.
In an example, the usage of the timer Tce _ level1 may also be: the base station presets a second preset time length when detecting that the data retransmission rate and the data block error rate are both smaller than a third preset threshold value, the timer Tce _ level1 is started, and when one of the data retransmission rate and the data block error rate does not meet a preset condition, the timer Tce _ level1 is stopped, whether the actual timing time length of the timer Tce _ level1 is larger than the second preset time length or not is detected, if the actual timing time length is larger than the second preset time length, the timer Tce _ level1 is represented to be overtime, and at the moment, the first coverage enhancement level of the terminal is determined to be adjusted to be a second coverage enhancement level.
Since the base station may be influenced by the outside when detecting the retransmission rate and/or the block error rate of the data during data transmission with the terminal, and both the retransmission rate and the block error rate of the data are detected to be smaller than the third preset threshold, but after the influence is eliminated at the next moment, it is detected that the retransmission rate and/or the block error rate of the data do not meet the preset condition, in order to ensure the accuracy of the detected data link quality, in this embodiment, after waiting for the second preset duration, it is detected again whether both the retransmission rate and the block error rate of the data are smaller than the third preset threshold, and it may be detected that the current link quality becomes better more accurately, so as to determine to adjust the coverage enhancement level to the second coverage enhancement level smaller than the first coverage enhancement level.
Another embodiment of the present application relates to a channel parameter adjusting method, which is applied to a terminal, where the terminal may be any terminal connected to a base station. The specific flow of the channel parameter adjusting method of this embodiment may be as shown in fig. 4, and includes:
Specifically, the current coverage enhancement level of the terminal is the first coverage enhancement level, but the current coverage enhancement level needs to be adjusted because the quality of the incoming link during data transmission with the base station changes, and the terminal receives the second coverage enhancement level transmitted by the base station to adjust the current coverage enhancement level.
In one example, the second coverage enhancement level is carried in a data packet sent by the terminal, and the terminal obtains the second coverage enhancement level by parsing the data packet.
Specifically, since the terminal should have a plurality of coverage enhancement levels, different coverage enhancement levels correspond to different channel parameters, and the terminal stores the channel parameters corresponding to each of the coverage enhancement levels in advance, after the terminal receives the second coverage enhancement level transmitted by the base station, the first channel parameter of the terminal may be adjusted to the channel parameter corresponding to the second coverage enhancement level.
In this embodiment, the terminal adjusts the current channel parameter corresponding to the first coverage enhancement level of the terminal to the channel parameter corresponding to the second coverage enhancement level by receiving the second coverage enhancement level sent by the base station, so that the channel parameters of the terminal and the base station are more matched with the signal strength of the current wireless network environment, which is beneficial to improving the data transmission quality of the terminal, and thus improving the user experience of the terminal in a mobile scene.
In one embodiment, after receiving a second coverage enhancement level sent by a base station, a terminal respectively acquires a detection period of the first coverage enhancement level and a detection period of the second coverage enhancement level; determining a target time for adjusting the first channel parameter according to the detection period of the first coverage enhancement level and the detection period of the second coverage enhancement level; at the target time, the first channel parameters of the terminal are adjusted to channel parameters corresponding to the second coverage enhancement level. In order to avoid that channel parameters corresponding to the first coverage enhancement level and the second coverage enhancement level respectively are configured and crossed when the first channel parameter is adjusted to the channel parameter corresponding to the second coverage enhancement level, which results in a failure in channel parameter adjustment, in the embodiment, a target time for adjusting the first channel parameter is determined according to the detection period of the first coverage enhancement level and the detection period of the second coverage enhancement level, and the channel parameter is adjusted at the target time, so that the first channel parameter can be adjusted to the channel parameter corresponding to the second coverage enhancement level more accurately. The method for determining the target time is substantially the same as that of the first embodiment, and is not described herein again.
It can be seen that, after receiving the second coverage enhancement level sent by the base station, the terminal determines the target time simultaneously with the base station, so that at the target time, the base station and the terminal simultaneously adjust the respective channel parameters to the channel parameters corresponding to the second coverage enhancement level.
In an embodiment, the channel parameter adjusting method of the present application may be implemented by an interactive process shown as follows, specifically including the following steps:
s501: a base station acquires link quality when data transmission is carried out with a terminal;
s502: the base station determines to adjust the first coverage enhancement level to a second coverage enhancement level;
s503: the base station sends the second coverage enhancement level to the terminal;
s504: the terminal receives a second coverage enhancement level;
s505: the terminal adjusts the first channel parameter to a channel parameter corresponding to the second coverage enhancement level, and the base station simultaneously adjusts the second channel parameter to a channel parameter corresponding to the second coverage enhancement level.
It should be noted that the channel parameter adjusting method in each of the above embodiments is not only applicable to NB-IoT communication technologies, but also can be extended to various wireless mobile communication technologies supporting enhanced coverage, such as eMTC technologies, which is not limited in the embodiments of the present application.
The steps of the above methods are divided for clarity, and the implementation may be combined into one step or split some steps, and the steps are divided into multiple steps, so long as the same logical relationship is included, which are within the scope of the present patent; it is within the scope of the patent to add insignificant modifications to the algorithms or processes or to introduce insignificant design changes to the core design without changing the algorithms or processes.
Another embodiment of the present application relates to an electronic device, as shown in fig. 5, including: at least one processor 501; and a memory 502 communicatively coupled to the at least one processor 501; wherein the memory 502 stores instructions executable by the at least one processor 501, the instructions being executed by the at least one processor 501 to enable the at least one processor 501 to perform the channel parameter adjusting method in the above embodiments.
Where the memory and processor are connected by a bus, the bus may comprise any number of interconnected buses and bridges, the bus connecting together various circuits of the memory and the processor or processors. The bus may also connect various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface provides an interface between the bus and the transceiver. The transceiver may be one element or a plurality of elements, such as a plurality of receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. The data processed by the processor is transmitted over a wireless medium via an antenna, which further receives the data and transmits the data to the processor.
The processor is responsible for managing the bus and general processing and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And the memory may be used to store data used by the processor in performing operations.
Another embodiment of the present application relates to a computer-readable storage medium storing a computer program. The computer program realizes the above-described method embodiments when executed by a processor.
That is, as can be understood by those skilled in the art, all or part of the steps in the method for implementing the embodiments described above may be implemented by a program instructing related hardware, where the program is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the method described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples of implementations of the present application and that various changes in form and details may be made therein without departing from the spirit and scope of the present application.
Claims (10)
1. A channel parameter adjusting method is applied to a base station, and comprises the following steps:
acquiring link quality during data transmission with a terminal, and determining whether to adjust a first coverage enhancement level of the terminal to a second coverage enhancement level according to the link quality;
if the first coverage enhancement grade of the terminal is determined to be adjusted to a second coverage enhancement grade, the second coverage enhancement grade is sent to the terminal so that the terminal can adjust the first channel parameter of the terminal to a channel parameter corresponding to the second coverage enhancement grade; the terminal should have a plurality of coverage enhancement grades, and the terminal stores channel parameters corresponding to each coverage enhancement grade in advance;
synchronously adjusting a second channel parameter of the base station to a channel parameter corresponding to the second coverage enhancement level; wherein the base station also stores in advance the channel parameters corresponding to each of the coverage enhancement levels.
2. The method according to claim 1, wherein the obtaining a link quality during data transmission with a terminal and determining whether to adjust a first coverage enhancement level of the terminal to a second coverage enhancement level according to the link quality comprises:
acquiring data retransmission rate and data block error rate when data transmission is carried out with the terminal;
detecting whether the data retransmission rate is greater than a first preset threshold and the data block error rate is greater than a second preset threshold;
if the data retransmission rate is greater than the first preset threshold and the data block error rate is greater than the second preset threshold, determining to adjust the first coverage enhancement level of the terminal to a second coverage enhancement level; wherein the first coverage enhancement level is less than the second coverage enhancement level.
3. The method of claim 1, wherein the obtaining the link quality during data transmission with a terminal and determining whether to adjust a first coverage enhancement level of the terminal to a second coverage enhancement level according to the link quality comprises:
acquiring data retransmission rate and data block error rate when data transmission is carried out with the terminal;
detecting whether the data retransmission rate and the data block error rate are both smaller than a third preset threshold value;
if the data retransmission rate and the data block error rate are both smaller than the third preset threshold, determining to adjust the first coverage enhancement level of the terminal to a second coverage enhancement level; wherein the first coverage enhancement level is greater than the second coverage enhancement level.
4. The method of claim 2, wherein the determining to adjust the first coverage enhancement level of the terminal to the second coverage enhancement level comprises:
waiting for a first preset time length, and detecting whether the data retransmission rate is greater than the first preset threshold value and whether the data block error rate is greater than the second preset threshold value after the first preset time length;
and if the data retransmission rate is detected to be greater than the first preset threshold value and the data block error rate is detected to be greater than the second preset threshold value again, adjusting the first coverage enhancement grade of the terminal to be a second coverage enhancement grade.
5. The method of claim 3, wherein the determining to adjust the first coverage enhancement level of the terminal to the second coverage enhancement level comprises:
waiting for a second preset time period, and detecting whether the data retransmission rate and the data block error rate are both smaller than a third preset threshold value again after the second preset time period;
and if the data retransmission rate and the data block error rate are detected to be smaller than the third preset threshold value again, adjusting the first coverage enhancement level of the terminal to be a second coverage enhancement level.
6. The method according to claim 1, wherein the synchronously adjusting the second channel parameter of the base station to the channel parameter corresponding to the second coverage enhancement level comprises:
respectively acquiring a detection period of the first coverage enhancement level and a detection period of the second coverage enhancement level;
determining a target time for adjusting the second channel parameter according to the detection period of the first coverage enhancement level and the detection period of the second coverage enhancement level;
and adjusting the second channel parameter to a channel parameter corresponding to the second coverage enhancement level at the target time.
7. A channel parameter adjusting method is applied to a terminal and comprises the following steps:
receiving a second coverage enhancement grade sent by the base station; the current coverage enhancement grade of the terminal is a first coverage enhancement grade;
adjusting a first channel parameter of the terminal to a channel parameter corresponding to the second coverage enhancement level; the terminal should have a plurality of coverage enhancement grades, and the terminal stores channel parameters corresponding to each coverage enhancement grade in advance.
8. The method according to claim 7, wherein the adjusting the first channel parameter of the terminal to the channel parameter corresponding to the second coverage enhancement level comprises:
respectively acquiring a detection period of the first coverage enhancement level and a detection period of the second coverage enhancement level;
determining a target time for adjusting the first channel parameter according to the detection period of the first coverage enhancement level and the detection period of the second coverage enhancement level;
and adjusting the first channel parameter of the terminal to the channel parameter corresponding to the second coverage enhancement level at the target moment.
9. An electronic device, comprising:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the channel parameter adjustment method of any one of claims 1 to 6, or to perform the channel parameter adjustment method of claim 7 or 8.
10. A computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the channel parameter adjustment method of any one of claims 1 to 6, or implements the channel parameter adjustment method of claim 7 or 8.
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