CN114885389A - Method and system for executing switching strategy based on MDT function and 5G base station - Google Patents
Method and system for executing switching strategy based on MDT function and 5G base station Download PDFInfo
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- CN114885389A CN114885389A CN202210808832.0A CN202210808832A CN114885389A CN 114885389 A CN114885389 A CN 114885389A CN 202210808832 A CN202210808832 A CN 202210808832A CN 114885389 A CN114885389 A CN 114885389A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/0085—Hand-off measurements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0061—Transmission or use of information for re-establishing the radio link of neighbour cell information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
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Abstract
The invention relates to a method, a system and a 5G base station for executing a switching strategy based on an MDT function, wherein the method comprises the following steps: informing the user terminal to start an MDT measurement function; the user terminal starts the MDT measurement function and reports the MDT measurement result to the 5G base station; the 5G base station firstly calculates the time interval rate of the user terminal and then calculates the moving rate; and judging whether the moving rate exceeds a preset threshold value, if so, switching the service cell of the user terminal to the adjacent cell according to a preset priority switching strategy. The 5G base station can execute a priority switching strategy when judging that the user terminal is in a high-speed moving scene based on the MDT measurement result so as to ensure that the user terminal can still be connected with a communication network in time when moving at a high speed and improve the user perception.
Description
Technical Field
The invention relates to the technical field of mobile communication terminal switching service cells, in particular to a method and a system for executing a switching strategy based on an MDT function and a 5G base station.
Background
In daily operation and maintenance work, due to the fact that optimal setting of base station parameters is impossible and the phenomenon of field wireless environment fluctuation exists, when a user is in a high-speed motion scene, the problems of untimely switching, ping-pong switching, unreasonable switching strategy and the like often occur, and therefore user perception is affected.
Therefore, it is desirable to provide a method, a system and a 5G base station that can perform a more flexible handover strategy for handing over a serving cell of a mobile terminal based on MDT measurement functions (Minimization of Driver Tests) in a high-speed scenario, so as to improve user perception.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method, a system and a 5G base station for executing a switching strategy based on an MDT function, which can improve user perception.
In order to solve the above technical problem, the present invention provides a method for executing a handover policy based on an MDT function, comprising the following steps:
S1.5G the base station informs the user terminal to start MDT measurement function;
s2, the user terminal starts an MDT measurement function and reports an MDT measurement result to the 5G base station, wherein the MDT measurement result comprises current service cell RSRP, RSRQ, neighbor cell RSRP, RSRQ, longitude and latitude information and timestamp information of N sampling points;
s3, the 5G base station firstly calculates X time interval rates of the user terminal according to the longitude and latitude information and the timestamp information of the N sampling points, and then takes the weighted average value of the X time interval rates as the moving rate of the user terminal; judging whether the moving speed exceeds a preset threshold value, if so, switching the service cell of the user terminal to an adjacent cell according to a preset priority switching strategy; wherein, N and X are both natural numbers larger than 1.
Further, the preset priority switching strategy includes the following three types:
first event switching policy: if the RSRP level of the adjacent cell is larger than a first preset range within a first preset duration than that of the current service cell, executing switching;
the second event switching strategy is as follows: if the RSRP level of the adjacent cell is larger than a second preset range within a second preset duration, executing switching;
the third event switching strategy: and if the RSRP level of the current serving cell is smaller than a third preset range within a third preset duration and the RSRP level of the neighboring cell is larger than a fourth preset range within the third preset duration, executing switching.
Furthermore, the first preset duration, the second preset duration and the third preset duration are all within 250ms to 260 ms;
the first preset range is 2-5 db; the second predetermined range is from-95 dbm to-105 dbm; the third predetermined range is from-100 dbm to-110 dbm; the fourth predetermined range is from-95 dbm to-105 dbm.
Further, after the step S3, or after the step S2 and before the step S3, the method further includes the steps of:
and S4, the 5G base station records the MDT measuring results and sends the MDT measuring results to a tracking collector after accumulating to a preset number.
Further, the MDT measurement includes an immediate MDT measurement mode and a stored MDT measurement mode;
the immediate MDT measurement mode refers to that the user terminal immediately starts the MDT measurement function after receiving the notice of starting the MDT measurement function and immediately reports the MDT measurement result;
the storing of the MDT measurement mode means that the user terminal performs MDT measurement in an idle state after receiving the notification of starting the MDT measurement function, and reports the MDT measurement result in a connected state.
Furthermore, the preset threshold value is flexibly set according to the current mobile scene of the user terminal.
In order to solve the above technical problem, the present invention further provides a 5G base station for executing a handover strategy based on an MDT function, including an RRC unit and a handover unit; the RRC unit comprises a module for informing the user terminal to start the MDT measurement function and a module for receiving the MDT measurement result reported by the user terminal; the MDT measuring result comprises a current service cell RSRP, an RSRQ, a neighboring cell RSRP, an RSRQ, longitude and latitude information of N sampling points and timestamp information;
the switching unit is used for firstly calculating X time interval rates of the user terminal according to the longitude and latitude information and the timestamp information of the N sampling points, and then taking a weighted average value of the X time interval rates as the moving rate of the user terminal; judging whether the moving speed exceeds a preset threshold value, if so, switching the service cell of the user terminal to a module of a neighboring cell according to a preset priority switching strategy; wherein, N and X are both natural numbers larger than 1.
Further, the preset priority switching strategy includes the following three types:
first event switching policy: if the RSRP level of the adjacent cell is larger than a first preset range within a first preset duration than that of the current service cell, executing switching;
the second event switching strategy is as follows: if the RSRP level of the adjacent cell is larger than a second preset range within a second preset duration, executing switching;
the third event switching strategy: and if the RSRP level of the current serving cell is smaller than a third preset range within a third preset duration and the RSRP level of the neighboring cell is larger than a fourth preset range within the third preset duration, executing switching.
Furthermore, the first preset duration, the second preset duration and the third preset duration are all within 250ms to 260 ms;
the first preset range is 2-5 db; the second predetermined range is from-95 dbm to-105 dbm; the third predetermined range is from-100 dbm to-110 dbm; the fourth predetermined range is from-95 dbm to-105 dbm.
In order to solve the above technical problem, the present invention further provides a system for executing a handover strategy based on an MDT function, including the above 5G base station, and a user terminal communicatively connected to the above 5G base station.
Compared with the prior art, the invention has the following beneficial effects: the 5G base station can execute a priority switching strategy when judging that the user terminal is in a high-speed moving scene based on the MDT measurement result so as to ensure that the user terminal can still be connected with a communication network in time when moving at a high speed and improve the user perception.
Drawings
Fig. 1 is a flowchart of method steps for executing a handover policy based on an MDT function according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that the operations are performed in other sequences than in the embodiments of the invention.
As shown in fig. 1, the method for executing a handover policy based on an MDT function according to an embodiment of the present invention includes the following steps:
S1.5G the base station informs the user terminal to start MDT measurement function;
s2, the user terminal starts an MDT measurement function and reports an MDT measurement result to the 5G base station; the MDT measurement result comprises Reference Signal Received Power (RSRP) of a current service cell, Reference Signal Receiving Quality (RSRQ), neighbor cell RSRP, RSRQ, longitude and latitude information and time stamp information of N sampling points;
S3.5G the base station calculates X time interval rates of the user terminal according to the longitude and latitude information and the timestamp information of the N sampling points, then uses the weighted average value of the X time interval rates as the moving rate of the user terminal, judges whether the moving rate exceeds the preset threshold value, if yes, switches the service cell of the terminal to the adjacent cell according to the preset priority switching strategy; wherein, N and X are both natural numbers larger than 1.
Specifically, in the present embodiment, the MDT measurement includes an immediate MDT measurement mode and a stored MDT measurement mode.
The immediate MDT measurement mode is that the user terminal immediately starts the MDT measurement function after receiving the notification of starting the MDT measurement function, and immediately reports the MDT measurement result.
The MDT measurement mode is stored in a state that the user terminal performs MDT measurement in an idle state after receiving a notification to start an MDT measurement function, and reports an MDT measurement result in a connected state.
The 5G base station can judge whether to start the immediate MDT measurement mode or the storage MDT measurement mode according to the current scene of the user terminal. Specifically, the current ue handles high speed mobile scenarios (e.g., mobile speed greater than 60 km/h), and may be notified to turn on the immediate MDT measurement mode. If the user terminal is in a low-speed mobile scenario (e.g., mobile speed of 30-60 km/h), the user terminal may be notified to turn on the storage MDT measurement mode.
In addition, the preset threshold value can be flexibly set according to the current moving scene of the user terminal. Specifically, the current ue handles a high-speed moving scenario (e.g. moving speed greater than 60 km/h), or turns on an immediate MDT measurement mode, the preset threshold may be greater than 60km/h or other values, or if the ue is in a low-speed moving scenario (e.g. moving speed of 30-60 km/h), or turns on a stored MDT measurement mode, the preset threshold may be greater than 30km/h or other values.
On the other hand, the N sampling points should be continuous sampling points, so that the calculation result is more accurate. The value ranges of N and X can be flexibly configured according to actual conditions.
In this embodiment, the preset priority switching policy includes the following three types:
first event switching policy: if the RSRP level of the adjacent cell is larger than the first preset range within the first preset duration than the RSRP level of the current service cell, executing switching;
the second event switching strategy is as follows: if the RSRP level of the adjacent cell is larger than a second preset range within a second preset duration, executing switching;
the third event switching strategy: and if the RSRP level of the current service cell is less than a third preset range within a third preset duration and the RSRP level of the neighboring cell is greater than a fourth preset range within the third preset duration, executing the switching.
Specifically, the three switching policies may be determined one by one, and switching may be performed when any one of the policies is satisfied. In addition, if the switching fails when the adjacent area is switched, the other adjacent area meeting the conditions is switched again to execute the switching until the switching is successful.
In this embodiment, the first predetermined duration, the second predetermined duration, and the third predetermined duration may be within 250ms to 260 ms. The first predetermined range is 2-5db, the second predetermined range is-95 dbm to-105 dbm, the third predetermined range is-100 dbm to-110 dbm, and the fourth predetermined range is-95 dbm to-105 dbm. The scope of the invention can be adjusted by those skilled in the art according to the actual situation without affecting the implementation of the invention.
On the other hand, in order to facilitate the network operator to grasp the network situation and reduce the network operation cost, in the present embodiment, after step S3, or after step S2 and before step S3, the method further includes the steps of:
S4.5G the base station records the MDT measurement results and sends the MDT measurement results to a Tracking Collection Entity (TCE) after accumulating to a preset number.
The embodiment of the invention also discloses a 5G base station executing the switching strategy based on the MDT function, which comprises an RRC unit and a switching unit. The RRC unit comprises a module for informing the user terminal to start an MDT measurement function and a module for receiving an MDT measurement result reported by the user terminal; and the MDT measurement result comprises a current service cell RSRP, an RSRQ, a neighboring cell RSRP, an RSRQ, longitude and latitude information of N sampling points and timestamp information.
The switching unit is used for calculating X time interval rates of the user terminal according to the longitude and latitude information and the timestamp information of the N sampling points, and then taking a weighted average value of the X time interval rates as the moving rate of the user terminal; judging whether the moving speed exceeds a preset threshold value, if so, switching the service cell of the user terminal to a module of a neighboring cell according to a preset priority switching strategy; wherein, N and X are both natural numbers larger than 1.
When the immediate MDT Measurement mode needs to be started, the RRC unit informs the user terminal to start the immediate MDT Measurement mode by sending an RRC Connection reconfiguration message (RRC Connection reconfiguration message), and the terminal reports an MDT Measurement result by returning an RRC Measurement Report message (RRC Measurement Report).
When the storage MDT measurement mode needs to be started, the RRC unit informs the user terminal to start the storage MDT measurement mode by sending a loggetMeasurementConnectification message (storage measurement configuration message). The user terminal reports the MDT measurement result to the 5G base station by returning UE information response after the idle state measurement information enters the connection state.
When the current user terminal handles a high-speed moving scenario (e.g., a moving speed greater than 60 km/h), or turns on the immediate MDT measurement mode, the switching unit may set the preset threshold to be greater than 60km/h or other values. If the ue is in a low-speed mobile scenario (e.g. mobile speed is 30-60 km/h), or the MDT measurement mode is turned on, the predetermined threshold may be greater than 30km/h or other values.
In this embodiment, the preset priority switching policy includes the following three types:
first event switching policy: if the RSRP level of the adjacent cell is larger than the first preset range within the first preset duration than the RSRP level of the current service cell, executing switching;
the second event switching strategy is as follows: if the RSRP level of the adjacent cell is larger than a second preset range within a second preset duration, executing switching;
the third event switching strategy: and if the RSRP level of the current service cell is smaller than a third preset range within a third preset duration and the RSRP level of the adjacent cell is larger than a fourth preset range within the third preset duration, executing the switching.
Specifically, the three switching policies may be determined one by one, and switching may be performed when any one of the policies is satisfied. In addition, if the switching fails when the adjacent area is switched, the other adjacent area meeting the conditions is switched again to execute the switching until the switching is successful.
In this embodiment, the first predetermined duration, the second predetermined duration, and the third predetermined duration may be within 250ms to 260 ms. The first predetermined range is 2-5db, the second predetermined range is-95 dbm to-105 dbm, the third predetermined range is-100 dbm to-110 dbm, and the fourth predetermined range is-95 dbm to-105 dbm. The scope of the invention can be adjusted by those skilled in the art according to the actual situation without affecting the implementation of the invention.
In summary, the 5G base station of the present invention can execute the priority handover policy when determining that the user terminal is in a high-speed moving scene based on the MDT measurement result, so as to ensure that the user terminal can still connect to the communication network in time when moving at a high speed, thereby improving the user perception.
The above examples merely represent preferred embodiments of the present invention, which are described in more detail and detail, but are not to be construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, and combinations of different features in the various embodiments are within the scope of the invention.
Claims (10)
1. A method for executing a handover strategy based on an MDT function is characterized by comprising the following steps:
S1.5G the base station informs the user terminal to start MDT measurement function;
s2, the user terminal starts an MDT measurement function and reports an MDT measurement result to the 5G base station, wherein the MDT measurement result comprises current service cell RSRP, RSRQ, neighbor cell RSRP, RSRQ, longitude and latitude information and timestamp information of N sampling points;
s3, the 5G base station firstly calculates X time interval rates of the user terminal according to the longitude and latitude information and the timestamp information of the N sampling points, and then takes the weighted average value of the X time interval rates as the moving rate of the user terminal; judging whether the moving speed exceeds a preset threshold value, if so, switching the service cell of the user terminal to an adjacent cell according to a preset priority switching strategy; wherein, N and X are both natural numbers larger than 1.
2. The method of claim 1, wherein the preset priority handover policy comprises three of:
first event switching policy: if the RSRP level of the adjacent cell is larger than a first preset range within a first preset duration than that of the current service cell, executing switching;
the second event switching strategy is as follows: if the RSRP level of the adjacent cell is larger than a second preset range within a second preset duration, executing switching;
the third event switching strategy: and if the RSRP level of the current serving cell is smaller than a third preset range within a third preset duration and the RSRP level of the neighboring cell is larger than a fourth preset range within the third preset duration, executing switching.
3. The method of claim 2, wherein the first predetermined duration, the second predetermined duration, and the third predetermined duration are within 250ms to 260 ms;
the first preset range is 2-5 db; the second predetermined range is from-95 dbm to-105 dbm; the third predetermined range is from-100 dbm to-110 dbm; the fourth predetermined range is from-95 dbm to-105 dbm.
4. The method of performing handover policy based on MDT function of claim 1, further comprising, after the step S3 or after the step S2 and before S3, the steps of:
and S4, the 5G base station records the MDT measuring results and sends the MDT measuring results to a tracking collector after accumulating to a preset number.
5. The method of performing a handover policy based on an MDT function of claim 1, wherein the MDT measurement comprises an immediate MDT measurement mode and a stored MDT measurement mode;
the immediate MDT measurement mode refers to that the user terminal immediately starts the MDT measurement function after receiving the notice of starting the MDT measurement function and immediately reports the MDT measurement result;
the storing of the MDT measurement mode means that the user terminal performs MDT measurement in an idle state after receiving the notification of starting the MDT measurement function, and reports the MDT measurement result in a connected state.
6. The method of claim 1, wherein the preset threshold is flexibly set according to a moving scene in which the user terminal is currently located.
7. A5G base station executing a switching strategy based on an MDT function is characterized by comprising an RRC unit and a switching unit; the RRC unit comprises a module for informing the user terminal to start the MDT measurement function and a module for receiving the MDT measurement result reported by the user terminal; the MDT measuring result comprises a current service cell RSRP, an RSRQ, a neighboring cell RSRP, an RSRQ, longitude and latitude information of N sampling points and timestamp information;
the switching unit is used for firstly calculating X time interval rates of the user terminal according to the longitude and latitude information and the timestamp information of the N sampling points, and then taking a weighted average value of the X time interval rates as the moving rate of the user terminal; judging whether the moving speed exceeds a preset threshold value, if so, switching the service cell of the user terminal to a module of a neighboring cell according to a preset priority switching strategy; wherein, N and X are both natural numbers larger than 1.
8. The MDT function-based 5G base station performing a handover strategy according to claim 7, wherein the preset priority handover strategy includes three kinds:
first event switching policy: if the RSRP level of the adjacent cell is larger than a first preset range within a first preset duration than that of the current service cell, executing switching;
the second event switching strategy is as follows: if the RSRP level of the adjacent cell is larger than a second preset range within a second preset duration, executing switching;
the third event switching strategy: and if the RSRP level of the current serving cell is smaller than a third preset range within a third preset duration and the RSRP level of the neighboring cell is larger than a fourth preset range within the third preset duration, executing switching.
9. The MDT function-based 5G base station of claim 8, wherein the first predetermined duration, the second predetermined duration, and the third predetermined duration are within 250ms to 260 ms;
the first preset range is 2-5 db; the second predetermined range is from-95 dbm to-105 dbm; the third predetermined range is from-100 dbm to-110 dbm; the fourth predetermined range is from-95 dbm to-105 dbm.
10. A system for performing a handover strategy based on an MDT function, comprising the 5G base station for performing a handover strategy based on an MDT function according to any one of claims 1 to 6, and a user terminal communicatively connected to the 5G base station for performing a handover strategy based on an MDT function.
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