Method for switching and reselecting cells in NR environment based on RSRP

Abstract

The invention provides a method for switching and reselecting a cell in an NR environment based on RSRP, and the method comprises the steps: extracting a signal attenuation feature of a current resident NR cell from a signal intensity record of signal attenuation, and determining the switching urgency degree of a signal in the current resident NR cell of user equipment through the signal attenuation feature and a signal intensity threshold value received by the user equipment; the switching periodicity of the RSRP value in each NR cell is extracted, the signal stability feature of each NR cell is determined through all the switching periodicity and the current signal strength of each NR cell, and the switching priority of each NR cell is determined according to each signal stability feature and the stable feature of the received signal strength of the user equipment in the target NR environment; and when the switching urgency degree is lower than a preset switching threshold value, switching the user equipment in the resident cell of the target NR environment based on each switching priority. Based on the scheme, the dynamic priority switching of the NR cells can be realized, so that the accuracy of the cell switching decision in the target NR environment can be improved.

Description

Technical Field

[0001] This application relates to the technical field of wireless communication networks. More specifically, this application relates to a method for cell handover and reselection based on RSRP in an NR environment. Background Art

[0002] With the wide application of the New Radio (NR) access technology, the mobile communication network faces higher data rate, lower latency, and larger-scale connection requirements. In the NR environment, the handover and reselection of user equipment (UE) between different cells are important processes to ensure network stability and communication quality. The Reference Signal Received Power (RSRP), as a key indicator to measure the strength of the wireless signal, directly affects cell selection and handover decisions.

[0003] Traditional handover mechanisms often make judgments only based on a single signal strength, without fully considering the load status, signal stability, and change period of the cell, which easily leads to inaccurate handovers, frequent handovers, or large signal fluctuations, affecting the user experience. Dynamic priority handover can comprehensively consider multiple factors, improve the accuracy of handover decisions, and reduce unnecessary handover times. Therefore, how to implement dynamic priority handover of NR cells to improve the accuracy of cell handover decisions in the target NR environment is a difficult problem faced by the industry. Summary of the Invention

[0004] This application provides a method for cell handover and reselection based on RSRP in an NR environment, which can achieve dynamic priority handover of NR cells, thereby improving the accuracy of cell handover decisions in the target NR environment.

[0005] This application provides a method for cell handover and reselection based on RSRP in an NR environment, and the method includes the following steps:

[0006] When the signal strength of the user equipment decays in the currently resident NR cell in the target NR environment, collect the signal strength record of the user equipment after the signal strength decay;

[0007] Extract the signal attenuation characteristics of the currently resident NR cell from the signal strength record, and determine the handover urgency of the signal of the user equipment in the currently resident NR cell through the signal attenuation characteristics and the signal strength threshold received by the user equipment;

[0008] Extract the handover periodicity of the RSRP value in each NR cell in the target NR environment, and then determine the signal stability characteristics of each NR cell based on all the handover periodicities and the current signal strength of each NR cell. Determine the handover priority of each NR cell in the target NR environment according to each signal stability characteristic and the smooth characteristic of the signal reception strength of the user equipment in the target NR environment;

[0009] When the handover urgency is lower than a preset handover threshold, perform handover on the serving cell of the user equipment in the target NR environment based on each handover priority.

[0010] In this embodiment, the NR environment is a 5G radio access environment.

[0011] In this embodiment, the RSRP is the reference signal received power of the cell.

[0012] In this embodiment, extracting the signal attenuation characteristics of the currently serving NR cell from the signal strength record specifically includes:

[0013] Obtain the attenuation period of the signal in the currently serving NR cell;

[0014] Obtain the signal attenuation amount of each attenuation period from the signal strength record;

[0015] Determine the signal attenuation characteristics of the currently serving NR cell through all the signal attenuation amounts.

[0016] In this embodiment, determining the handover urgency of the signal of the user equipment in the currently serving NR cell through the signal attenuation characteristics and the signal strength threshold received by the user equipment specifically includes:

[0017] Obtain the current signal strength of the user equipment in the currently serving NR cell;

[0018] Determine the handover distance of the signal of the user equipment in the currently serving NR cell through the current signal strength and the signal strength threshold received by the user equipment;

[0019] Determine the handover urgency of the signal of the user equipment in the currently serving NR cell through the handover distance and the signal attenuation characteristics.

[0020] In this embodiment, extracting the handover periodicity of the RSRP value in each NR cell in the target NR environment specifically includes:

[0021] For each NR cell in the target NR environment, obtain the signal handover record of the NR cell;

[0022] Extract all the RSRP values of the NR cell from the signal handover record;

[0023] Determine the handover periodicity of the RSRP value in the NR cell based on all the RSRP values, and then determine the handover periodicity of the RSRP value in each NR cell in the target NR environment.

[0024] In this embodiment, determining the signal stability characteristics of each NR cell based on all the handover periodicities and the current signal strength of each NR cell specifically includes:

[0025] For each NR cell, extract all the neighboring RSRP values of the NR cell from the handover periodicity of the RSRP value in the NR cell based on the current signal strength of the NR cell;

[0026] Determine the signal stability characteristics of the NR cell based on all the neighboring RSRP values, and then obtain the signal stability characteristics of each NR cell.

[0027] In this embodiment, determining the handover priority of each NR cell in the target NR environment based on each signal stability characteristic and the smoothness characteristic of the signal strength received by the user equipment in the target NR environment specifically includes:

[0028] For each NR cell in the target NR environment, obtain the initial priority of the NR cell signal handover;

[0029] Perform a stability comparison between the signal stability characteristic of the NR cell and the smoothness characteristic of the signal strength received by the user equipment in the target NR environment to obtain the characteristic matching degree of the NR cell;

[0030] Determine the handover priority of the NR cell based on the characteristic matching degree and the initial priority.

[0031] In this embodiment, based on each handover priority, perform a handover on the serving cell of the user equipment in the target NR environment, and use the NR cell with the highest handover priority as the handover target of the serving cell of the user equipment in the target NR environment.

[0032] In this embodiment, the user equipment is a terminal device connected to a wireless communication network.

[0033] The technical solutions provided by the disclosed embodiments of the present application have the following beneficial effects:

[0034] When the signal strength of the user equipment attenuates in the currently resident NR cell of the target NR environment, collect the signal strength record of the user equipment after the signal strength attenuation; extract the signal attenuation characteristics of the currently resident NR cell from the signal strength record, and determine the switching urgency of the signal of the user equipment in the currently resident NR cell through the signal attenuation characteristics and the signal strength threshold received by the user equipment; extract the switching periodicity of the RSRP value in each NR cell in the target NR environment, and then determine the signal stability characteristics of each NR cell through all the switching periodicities and the current signal strength of each NR cell, and determine the switching priority of each NR cell in the target NR environment according to each signal stability characteristic and the stable characteristic of the signal received by the user equipment in the target NR environment; when the switching urgency is lower than the preset switching threshold, switch the resident cell of the user equipment in the target NR environment based on each switching priority.

[0035] It can be seen from this application that when the switching urgency is lower than the preset switching threshold, the resident cell of the user equipment in the target NR environment is switched based on each switching priority; first, by monitoring and analyzing the signal attenuation and device status in real time, the switching urgency is dynamically judged, which can avoid triggering the switch too early or too late, thereby improving the accuracy of the switching decision and reducing the ineffective switching and network burden; then, by comprehensively considering the signal stability of the cell and the signal requirements of the device, the switching priority is made more accurate, which can not only improve the utilization efficiency of network resources, but also ensure that the user equipment can stably select the most suitable cell for access when the network environment changes. Dynamically adjusting the switching priority can intelligently respond to the load changes, user location changes and interference conditions in the network, thereby reducing unnecessary switching, improving the success rate of switching and the user experience, so that the accuracy of the cell switching decision can be significantly improved, effectively avoiding the decline of network performance and the impairment of user experience, and further improving the accuracy of the cell switching decision in the target NR environment.

[0036] In summary, the technical solution adopted in this application can realize the dynamic priority switching of NR cells, thereby improving the accuracy of the cell switching decision in the target NR environment. Brief Description of the Drawings

[0037] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, form a part of this application, and do not constitute a limitation on the embodiments of the present invention. In the drawings:

[0038] Figure 1 is a flowchart of a method for switching and reselecting cells based on RSRP in an NR environment provided by this application;

[0039] Figure 2It is an exemplary flowchart for determining signal stability characteristics provided according to the present application. Detailed implementation manners

[0040] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with embodiments and drawings. The illustrative embodiments of the present invention and their descriptions are only used to explain the present invention and do not limit the present invention. It should be noted that the present invention has been in the actual R & D and use stage.

[0041] To better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the accompanying drawings of the specification and specific implementation manners. Refer to Figure 1 As shown, this figure is an exemplary flowchart of a method for cell handover and reselection based on RSRP in an NR environment according to an embodiment of the present application. The method includes the following steps:

[0042] In step S1, when the signal strength of the user equipment decays in the currently resident NR cell in the target NR environment, the signal strength record of the user equipment after the signal strength decay is collected.

[0043] It should be noted that in the present application, the NR environment is a 5G radio access environment; the RSRP is the reference signal received power of the cell; and the user equipment is a terminal device connected to the wireless communication network.

[0044] In specific implementation, when the signal strength of the user equipment decays in the currently resident NR cell in the target NR environment, the radio measurement interface in the physical layer of the user equipment can be used to collect the signal strength values within a specified time period (default is the most recent 2 hours) after the signal strength decay at each fixed interval (default is 1 s). The set of all signal strength values can be used as the signal strength record of the user equipment after the signal strength decay.

[0045] In step S2, the signal attenuation characteristics of the currently resident NR cell are extracted from the signal strength record, and the handover urgency of the signal of the user equipment in the currently resident NR cell is determined based on the signal attenuation characteristics and the signal strength threshold received by the user equipment.

[0046] In this embodiment, the signal attenuation characteristics of the currently resident NR cell can be extracted from the signal strength record in the following specific manner, that is:

[0047] Obtain the attenuation period of the signal in the currently resident NR cell;

[0048] Obtain the signal attenuation amount of each attenuation period from the signal strength record;

[0049] Determine the signal attenuation characteristics of the currently resident NR cell based on all signal attenuation amounts.

[0050] It should be noted that in this application, the signal attenuation characteristics refer to the characteristics of the signal attenuation law; in specific implementation, first, the attenuation period is defaulted to 10s, and can also be preset in combination with historical experience. The attenuation period refers to the time period during which the signal strength of the currently resident NR cell drops from the maximum value to the minimum value and then rises back to a predetermined value; then, calculate the difference in signal strength before and after the attenuation period every other attenuation period from the signal strength record as the signal attenuation amount for the corresponding attenuation period, and thus the signal attenuation amount for each attenuation period can be obtained. The signal attenuation amount refers to the difference in signal strength before and after an attenuation period; finally, the average value of all signal attenuation amounts can be used as the signal attenuation characteristics of the currently resident NR cell.

[0051] In this embodiment, to determine the switching urgency of the signal of the user equipment in the currently resident NR cell based on the signal attenuation characteristics and the signal strength threshold received by the user equipment, the following method can be specifically adopted, that is:

[0052] Obtain the current signal strength of the user equipment in the currently resident NR cell;

[0053] Determine the switching distance of the signal of the user equipment in the currently resident NR cell based on the current signal strength and the signal strength threshold received by the user equipment;

[0054] Determine the switching urgency of the signal of the user equipment in the currently resident NR cell based on the switching distance and the signal attenuation characteristics.

[0055] It should be noted that in this application, the switching urgency refers to the urgency degree of signal switching of the user equipment in the currently resident NR cell; in specific implementation, first, the current signal strength of the user equipment in the currently resident NR cell can be obtained from the console of the user equipment; then, the difference between the current signal strength and the signal strength threshold received by the user equipment can be used as the switching distance of the signal of the user equipment in the currently resident NR cell. The switching distance refers to the intensity distance from the current signal strength in the currently resident NR cell to the strength at which switching is required; finally, if the switching distance is less than or equal to 0, the switching urgency of the signal of the user equipment in the currently resident NR cell is 1 (the maximum value at this time), and if the switching distance is greater than 0, the ratio of the signal attenuation characteristics to the switching distance can be used as the switching urgency of the signal of the user equipment in the currently resident NR cell.

[0056] In step S3, the handover periodicity of the RSRP values in each NR cell in the target NR environment is extracted. Then, based on all the handover periodicities and the current signal strengths of each NR cell, the signal stability characteristics of each NR cell are determined. According to each signal stability characteristic and the smoothness characteristic of the signal strength received by the user equipment in the target NR environment, the handover priorities of each NR cell in the target NR environment are determined.

[0057] In this embodiment, the following method can be specifically adopted to extract the handover periodicity of the RSRP values in each NR cell in the target NR environment, that is:

[0058] For each NR cell in the target NR environment, obtain the signal handover record of the NR cell;

[0059] Extract all the RSRP values of the NR cell from the signal handover record;

[0060] Determine the handover periodicity of the RSRP values in the NR cell through all the RSRP values, and then determine the handover periodicity of the RSRP values in each NR cell in the target NR environment.

[0061] It should be noted that in this application, the handover periodicity refers to the regularity of the signal strength change when the user equipment switches to the NR cell each time. Specifically, when implemented, first, for each NR cell in the target NR environment, the signal handover record of the NR cell within a specified handover time period (by default, the most recent month) can be collected; then, the RSRP value at each time of switching to the NR cell is extracted from the signal handover record as all the RSRP values of the NR cell; finally, the periodicity analysis algorithm (for example: frequency domain analysis algorithm) can be used to extract the periodic characteristics of all the RSRP values as the handover periodicity of the RSRP values in the NR cell. Through the above method, the handover periodicity of the RSRP values in each NR cell in the target NR environment can be obtained.

[0062] Preferably, in this embodiment, refer to Figure 2 As shown, this figure is an exemplary flowchart for determining the signal stability characteristics in the embodiment of this application. In this embodiment, the following steps can be specifically adopted to determine the signal stability characteristics of each NR cell through all the handover periodicities and the current signal strengths of each NR cell:

[0063] First, in step S31, for each NR cell, all the adjacent RSRP values of the NR cell are extracted from the handover periodicity of the RSRP values in the NR cell through the current signal strength of the NR cell;

[0064] Then, in step S32, the signal stability characteristics of the NR cell are determined through all the adjacent RSRP values, and then the signal stability characteristics of each NR cell are obtained.

[0065] It should be noted that in this application, the signal stability feature is a feature that describes the degree of signal stability. Specifically, in implementation, first, for each NR cell, the RSRP values adjacent to the current signal strength can be extracted from the handover period based on the current signal strength of the NR cell (for example, the RSRP of the UE at a certain moment). The adjacent RSRP values refer to other signal strength values near the current signal strength in the handover period, and the adjacent RSRP values include the peak value, valley value, and values with little difference from the current signal strength in the handover period. Then, the standard deviation of all adjacent RSRP values can be used as the signal stability feature of the NR cell, and the signal stability features of each NR cell can be obtained through the above method.

[0066] In this embodiment, to determine the handover priority of each NR cell in the target NR environment according to each signal stability feature and the smooth feature of the signal strength received by the user equipment in the target NR environment, the following method can be specifically adopted, that is:

[0067] For each NR cell in the target NR environment, obtain the initial priority of the NR cell signal handover;

[0068] Compare the signal stability feature of the NR cell with the smooth feature of the signal strength received by the user equipment in the target NR environment to obtain the feature matching degree of the NR cell;

[0069] Determine the handover priority of the NR cell through the feature matching degree and the initial priority.

[0070] It should be noted that in this application, the handover priority indicates the priority degree of the user equipment for performing the handover of the resident cell. Specifically, in implementation, first, for each NR cell in the target NR environment, the order of the most recent signal handover of the NR cell can be obtained from the console of the user equipment as the initial priority. Then, the cosine similarity between the signal stability feature of the NR cell and the smooth feature of the signal strength received by the user equipment in the target NR environment can be used as the result of the stability comparison, and further, the result of the stability comparison can be used as the feature matching degree of the NR cell. Among them, the standard deviation of the current signal strength of each NR cell in the target NR environment can be used as the smooth feature of the signal strength received by the user equipment in the target NR environment. The feature matching degree refers to the similarity between the signal stability feature of the NR cell and the signal smooth feature received by the user equipment. Finally, the feature matching degree and the initial priority can be combined by a weighted method to obtain the final handover priority. Among them, the weight can be preset and adjusted according to network requirements and historical experience. For example, a cell with a high signal stability matching degree may have a higher weight, and a cell with a higher initial priority may also have a higher weight.

[0071] In step S4, when the handover urgency is lower than a preset handover threshold, the serving cell of the user equipment in the target NR environment is handed over based on each handover priority.

[0072] It should be noted that the handover threshold represents

[0073] In this embodiment, handing over the serving cell of the user equipment in the target NR environment based on each handover priority means taking the NR cell with the highest handover priority as the handover target of the serving cell of the user equipment in the target NR environment.

[0074] It can be seen that in this application, when the handover urgency is lower than a preset handover threshold, the serving cell of the user equipment in the target NR environment is handed over based on each handover priority. First, by monitoring and analyzing the signal attenuation and device status in real time, the handover urgency is dynamically judged, which can avoid triggering handovers too early or too late, thereby improving the accuracy of handover decisions and reducing ineffective handovers and network burdens. Then, by comprehensively considering the signal stability of the cell and the signal requirements of the device, the handover priority is made more accurate, which can not only improve the utilization efficiency of network resources, but also ensure that the user equipment can stably select the most suitable cell for access when the network environment changes. Dynamically adjusting the handover priority can intelligently respond to load changes, user location changes, and interference situations in the network, thereby reducing unnecessary handovers, improving the success rate of handovers and the user experience, and thus significantly improving the accuracy of cell handover decisions, effectively avoiding network performance degradation and user experience impairment, and further improving the accuracy of cell handover decisions in the target NR environment.

[0075] In summary, the technical solution adopted in this application can achieve dynamic priority handover of NR cells, thereby improving the accuracy of cell handover decisions in the target NR environment.

[0076] The specific embodiments described above further elaborate on the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only for the specific embodiments of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for switching and reselecting a cell based on RSRP in an NR environment, characterized in that: The method comprises the following steps: When the signal strength of the user equipment attenuates in the current NR cell of the target NR environment, a signal strength record of the user equipment after the signal strength attenuates is collected; Extracting a signal attenuation feature of the current NR cell from the signal strength record, and determining the urgency of switching the signal of the user equipment in the current NR cell according to the signal attenuation feature and a signal strength threshold received by the user equipment; Extract the switching periodicity of the RSRP value in each NR cell in the target NR environment, and then determine the signal stability characteristics of each NR cell through all the switching periodicities and the current signal strength of each NR cell, and determine the switching priority of each NR cell in the target NR environment according to each signal stability characteristic and the stable characteristics of the signal strength received by the user equipment in the target NR environment; When the switching urgency is lower than a preset switching threshold, the resident cell of the user equipment in the target NR environment is switched based on each switching priority.

2. A method for switching and reselecting a cell based on RSRP in an NR environment as claimed in claim 1, characterized in that: The NR environment is a 5G wireless access environment.

3. A method for switching and reselecting a cell based on RSRP in an NR environment as claimed in claim 1, characterized in that: The RSRP is the reference signal received power of the cell.

4. A method for switching and reselecting a cell based on RSRP in an NR environment as claimed in claim 1, characterized in that: Extracting the signal attenuation characteristics of the current resident NR cell from the signal strength record specifically includes: Obtain the attenuation period of the signal in the current NR cell; Obtaining the signal attenuation amount of each attenuation cycle from the signal strength record; The signal attenuation characteristics of the current NR cell are determined by all signal attenuation amounts.

5. A method for switching and reselecting a cell based on RSRP in an NR environment as claimed in claim 1, characterized in that: Determining the urgency of switching the signal of the user equipment in the current NR cell by using the signal attenuation characteristic and the signal strength threshold received by the user equipment specifically includes: Obtain the current signal strength of the user equipment in the current NR cell; Determine the switching distance of the signal of the user equipment in the current NR cell according to the current signal strength and the signal strength threshold received by the user equipment; The switching urgency of the signal of the user equipment in the currently residing NR cell is determined by the switching distance and the signal attenuation characteristics.

6. A method for switching and reselecting a cell based on RSRP in an NR environment as claimed in claim 1, characterized in that: The switching periodicity of extracting the RSRP value of each NR cell in the target NR environment specifically includes: For each NR cell in the target NR environment, obtain the signal switching record of the NR cell; Extract all RSRP values ​​of the NR cell from the signal switching record; The switching periodicity of the RSRP value in the NR cell is determined by all RSRP values, and then the switching periodicity of the RSRP value in each NR cell in the target NR environment is determined.

7. A method for switching and reselecting a cell based on RSRP in an NR environment as claimed in claim 1, characterized in that: The signal stability characteristics of each NR cell are determined by all switching periodicities and the current signal strength of each NR cell, specifically including: For each NR cell, all adjacent RSRP values ​​of the NR cell are extracted from the switching periodicity of the RSRP value in the NR cell by the current signal strength of the NR cell; The signal stability characteristics of the NR cell are determined by all adjacent RSRP values, and then the signal stability characteristics of each NR cell are obtained.

8. A method for switching and reselecting a cell based on RSRP in an NR environment as claimed in claim 1, characterized in that: Determining the handover priority of each NR cell in the target NR environment according to the stability characteristics of each signal and the stable characteristics of the signal strength received by the user equipment in the target NR environment specifically includes: For each NR cell in the target NR environment, obtain the initial priority of NR cell signal switching; Compare the stability of the signal stability characteristics of the NR cell and the stable characteristics of the signal strength received by the user equipment in the target NR environment to obtain the characteristic matching degree of the NR cell; The switching priority of the NR cell is determined by the feature matching degree and the initial priority.

9. A method for switching and reselecting a cell based on RSRP in an NR environment as claimed in claim 1, characterized in that: Based on each switching priority, the resident cell of the user equipment in the target NR environment is switched to use the NR cell with the highest switching priority as the switching target of the resident cell of the user equipment in the target NR environment.

10. A method for switching and reselecting a cell based on RSRP in an NR environment as claimed in claim 1, characterized in that: The user equipment is a terminal device connected to a wireless communication network.

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