CN111065138B - Switching triggering method and user terminal equipment - Google Patents

Switching triggering method and user terminal equipment Download PDF

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Publication number
CN111065138B
CN111065138B CN201911382163.XA CN201911382163A CN111065138B CN 111065138 B CN111065138 B CN 111065138B CN 201911382163 A CN201911382163 A CN 201911382163A CN 111065138 B CN111065138 B CN 111065138B
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cell
signal quality
handover
serving cell
measurement
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CN111065138A (en
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刘洋
张力方
胡泽妍
胡云
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China United Network Communications Group Co Ltd
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China United Network Communications Group Co Ltd
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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
    • 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
    • H04W36/00837—Determination of triggering parameters for hand-off
    • 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

Abstract

The invention discloses a switching triggering method and user terminal equipment, relates to the technical field of communication, and is used for triggering a switching cell. The method comprises the following steps: measuring signal quality of a target neighbor cell and signal quality of a serving cell of the UE; judging whether the signal quality of a target neighbor cell and the signal quality of a serving cell meet a first preset condition or not; wherein, the first preset condition comprises: the difference value between a first measurement value obtained by measuring the signal quality of a target neighbor cell and a second measurement value obtained by measuring the signal quality of a serving cell in a measurement event is larger than a first preset threshold value; the first preset threshold value is reduced along with the increase of the UE moving speed; if the signal quality of the target neighbor cell and the signal quality of the serving cell meet a first preset condition, reporting a handover event measurement report; a handover event measurement report for handover of the UE from the serving cell to the target neighbor cell. The embodiment of the invention is applied to triggering the switching between the service cell and the target adjacent cell in advance.

Description

Switching triggering method and user terminal equipment
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a handover triggering method and a user equipment.
Background
Currently, a User Equipment (UE) triggers handover between two adjacent cells by determining a cell handover event, specifically including a base station issuing measurement control to the UE, and the UE measuring signal quality of a current serving cell and a neighboring cell after receiving the measurement control. And if the measurement result meets the judgment condition of the cell switching event, namely the signal quality of the target adjacent cell is higher than that of the serving cell, sending a switching event measurement report to the base station, and sending a switching instruction to the UE by the base station so as to switch the UE from the serving cell to the adjacent cell.
However, when the UE is in a high-speed moving environment, especially in a specific environment such as a high-speed running car, subway, train, etc., as the moving speed of the UE increases, after the UE reports the handover event measurement report, the wireless network environment rapidly deteriorates, so that the UE cannot normally receive the handover instruction issued by the base station side, and thus handover failure occurs, which eventually causes a call drop or a line drop, which affects user experience.
Disclosure of Invention
The embodiment of the invention provides a switching triggering method and user terminal equipment, which are used for triggering a switching cell.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
in a first aspect, a handover triggering method is provided, including: measuring signal quality of a target neighbor cell and signal quality of a serving cell of the UE; wherein the target neighbor cell comprises one of neighbor cells of the serving cell; judging whether the signal quality of a target neighbor cell and the signal quality of a serving cell meet a first preset condition or not; wherein, the first preset condition comprises: the difference value between a first measurement value obtained by measuring the signal quality of a target neighbor cell and a second measurement value obtained by measuring the signal quality of a serving cell in a measurement event is larger than a first preset threshold value; the first preset threshold value is reduced along with the increase of the UE moving speed; the first measurement value is positively correlated with the signal quality of the target adjacent cell, and the second measurement value is positively correlated with the signal quality of the serving cell; if the signal quality of the target neighbor cell and the signal quality of the serving cell meet a first preset condition, reporting a handover event measurement report; wherein the handover event measurement report is used for handing over the UE from the serving cell to the target neighbor cell.
In a second aspect, a UE is provided, where the UE includes a measurement unit, a determination unit, and a reporting unit; a measurement unit for measuring signal quality of a target neighbor cell and signal quality of a serving cell of the UE; wherein the target neighbor cell comprises one of neighbor cells of the serving cell; the measuring unit is used for judging whether the signal quality of the target neighbor cell and the signal quality of the serving cell which are measured by the measuring unit meet a first preset condition or not; wherein, the first preset condition comprises: the difference value between a first measurement value obtained by measuring the signal quality of a target neighbor cell and a second measurement value obtained by measuring the signal quality of a serving cell in a measurement event is larger than a first preset threshold value; the first preset threshold value is reduced along with the increase of the UE moving speed; the first measurement value is positively correlated with the signal quality of the target adjacent cell, and the second measurement value is positively correlated with the signal quality of the serving cell; a reporting unit, configured to report a handover event measurement report if the determining unit determines that the signal quality of the target neighboring cell and the signal quality of the serving cell meet a first preset condition; wherein the handover event measurement report is used for handing over the UE from the serving cell to the target neighbor cell.
In a third aspect, there is provided a computer readable storage medium storing one or more programs, the one or more programs comprising instructions; the instructions, when executed by a computer, cause the computer to perform a handover triggering method as provided by the first aspect.
In a fourth aspect, a UE is provided, the UE comprising: a processor, a memory, and a communication interface; the communication interface is used for the UE to communicate with other equipment or a network; the memory is used for storing one or more programs, the one or more programs comprising computer executable instructions, which when the UE is running, the processor executes the computer executable instructions stored by the memory to cause the UE to perform the handover triggering method as provided in the first aspect.
In a fifth aspect, a computer program product is provided, which comprises instructions that, when executed on a computer, cause the computer to perform the handover triggering method provided in the first aspect.
The embodiment of the invention provides a handover triggering method and user terminal equipment, which judge whether the signal quality of a target neighbor cell and the signal quality of a serving cell meet a first preset condition after measuring the signal quality of the target neighbor cell and the signal quality of the serving cell, and if so, report a handover event measurement report. By the technical scheme, when judging whether the difference value between the first measurement value and the second measurement value is larger than the first preset threshold value, the first preset threshold value is reduced along with the increase of the moving speed of the UE, and correspondingly, the first preset condition is relaxed along with the increase of the moving speed of the UE. It can be understood that, by using the above technical solution, compared with the UE with a slow moving speed, the UE with a fast moving speed can meet the first preset condition in advance, so that the UE with a fast moving speed reports the handover event measurement report in advance. Finally, the UE with high moving speed can be switched to the target adjacent cell from the service cell in advance relative to the UE with low moving speed, so that the technical problem of cell switching failure caused by too high vehicle speed is solved.
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Fig. 1 is a first schematic diagram of a cell handover according to an embodiment of the present invention;
fig. 2 is a first flowchart illustrating a handover triggering method according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of a handover triggering method according to an embodiment of the present invention;
fig. 4 is a third schematic flowchart of a handover triggering method according to an embodiment of the present invention;
fig. 5 is a fourth schematic flowchart of a handover triggering method according to an embodiment of the present invention;
fig. 6 is a first schematic structural diagram of a user terminal device according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a user terminal device according to an embodiment of the present invention;
fig. 8 is a third schematic structural diagram of a user terminal device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention.
In the description of the present invention, "/" means "or" unless otherwise specified, for example, a/B may mean a or B. "and/or" herein is merely an association describing an associated object, and means that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. Further, "at least one" means one or more, "a plurality" means two or more. The terms "first", "second", and the like do not necessarily limit the number and execution order, and the terms "first", "second", and the like do not necessarily limit the difference.
The inventive concept of the present invention is described below: currently, as shown in fig. 1, when a UE moves from a serving cell of a serving base station to a target neighboring cell of a target base station in a state of being connected to the serving base station where the UE is located, the UE is triggered to switch between two neighboring cells mainly through the determination of a cell switching event to implement mobility management of the UE. The mobility management of the UE specifically comprises that a service base station issues measurement control to the UE; after receiving the measurement control, the UE periodically measures the signal quality of the serving cell and the target neighbor cell and periodically reports a measurement report according to the measurement result; and if the signal quality of the target neighbor cell is higher than that of the serving cell in any measurement result, the UE judges that the measurement result meets the judgment condition of the cell switching event. Further, the UE converts the periodically reported measurement report into a handover event measurement report, and reports the handover event measurement report to the serving base station. And after receiving the switching event measurement report, the serving base station sends a switching instruction to the UE and the target base station, so that the UE can be switched from the serving cell to the target neighbor cell after receiving the switching instruction.
Based on the technology, the invention discovers that when the UE is in a high-speed moving environment, particularly in a specific environment such as a high-speed running automobile, a subway, a train and the like, along with the improvement of the moving speed of the UE, after the UE reports a measurement report of a handover event to a service base station, the wireless network environment is rapidly deteriorated due to the excessively high moving speed. With the deterioration of the wireless network environment, the UE cannot normally receive the handover command issued by the base station side, so that the UE fails to handover the cell, and finally the UE drops the call or is disconnected, which affects the user experience.
In view of the above technical problems, the present invention considers that when the UE moves too fast, the determination condition of the cell switching event can be modified according to the moving speed of the UE, so that the determination condition is relaxed. Therefore, when the UE judges whether the signal quality of the target adjacent cell and the signal quality of the serving cell meet the cell switching event condition or not, the UE can enable the signal quality of the target adjacent cell and the signal quality of the serving cell to meet the modified cell switching event judgment condition in advance. Furthermore, the UE can report the handover event measurement report in advance, thereby solving the above technical problems.
Based on the above inventive concept, as shown in fig. 2, an embodiment of the present invention provides a handover triggering method, which is applied to a UE100, and the handover triggering method, as shown in fig. 2, specifically includes: S201-S203:
s201, the UE100 measures the signal quality of the target neighbor cell and the signal quality of the serving cell of the UE 100.
Wherein the target neighbor cell comprises one of the neighbor cells of the serving cell.
As a possible implementation manner, the UE100 may periodically measure the signal quality of the target neighboring cell and the signal quality of the serving cell after receiving the measurement control issued by the serving base station where the serving cell is located.
The measurement Control may specifically be configured to send the measurement configuration message to the UE100 through a measconfiguration cell and an s-Measure cell carried by a Radio Resource Control Connection reconfiguration message (RRC Connection reconfiguration ) by the serving base station.
It should be noted that the target neighboring cell and the serving cell in the embodiment of the present invention may be different cells within the coverage of the same base station. Alternatively, the target neighboring cell and the serving cell in the embodiment of the present invention may also be different cells within the coverage area of different base stations.
S202, the UE100 determines whether the signal quality of the target neighboring cell and the signal quality of the serving cell satisfy a first preset condition.
Optionally, the first preset condition includes: the difference value between a first measurement value obtained by measuring the signal quality of the target neighbor cell and a second measurement value obtained by measuring the signal quality of the serving cell in one measurement event is larger than a first preset threshold value.
Wherein the first preset threshold value decreases as the moving speed of the UE100 increases. The first measurement value is positively correlated with the signal quality of the target neighbor cell and the second measurement value is positively correlated with the signal quality of the serving cell.
It should be noted that, a measurement event includes measuring the signal quality of the target neighbor cell once, and measuring the signal quality of the serving cell once. The first measurement value may be Reference Signal Receiving Power (RSRP) measured by the UE100, may be Reference Signal Receiving Quality (RSRQ) measured by the UE100, and the second measurement value may be RSRP or RSRQ of the same measurement type as the first measurement value.
Optionally, in the handover triggering method provided in the embodiment of the present invention, the first preset condition may specifically include Mn + Ofn + Ocn + Hoffset-Hys>Ms + Ofs + Ocs + Off. Correspondingly, the first preset threshold may be Ofs + Ocs + Off-Ofn-Ocn-Hoffset+Hys。
Wherein HoffsetFor handover bias, Mn is a first measured value, Ofn is a frequency specific bias of the target neighbor cell, and Ocn is a cell specific bias of the target neighbor cell; hys is a hysteresis parameter of the serving cell; ms is a second measurement; ofs is the frequency specific offset of the serving cell; ocs is the cell specific offset of the serving cell; off is the event bias for cell handover.
In the embodiment of the present invention, the handover offset increases as the moving speed of the UE100 increases.
It should be noted that in the first preset condition provided in the embodiment of the present invention, Ofn may be directly obtained from measurement control issued by the serving base station. The Ocn can be directly obtained from measurement control issued by the serving base station. Hys can be obtained directly from measurement control issued by the serving base station. Ofs can be obtained directly from measurement control issued by the serving base station. The Ocs can be directly obtained from measurement control issued by the serving base station. Off can be obtained directly from the measurement control issued by the serving base station.
Optionally, as shown in fig. 3, in order to calculate a handover bias so as to determine the first preset condition, the handover triggering method provided in the embodiment of the present invention further includes, before S202, S1-S2:
s1, the UE100 obtains the moving speed of the UE100 and the distance between the serving base station of the serving cell and the UE 100.
As a possible implementation manner, the UE100 may acquire the moving speed of itself through a built-in Global Positioning System (GPS).
As a possible implementation manner, the distance between the serving base station where the serving cell is located and the UE100 may be calculated according to the longitude and latitude of the serving base station and the longitude and latitude of the location where the UE100 is located by using the following formula one:
d＝arccos((sinα×sinβ)+cosα×cosβ×cos(γ-θ))×d0formula one
Wherein d is the distance between the UE and the serving base station; alpha is the latitude of the UE; β is the latitude of the serving base station, γ is the longitude of the UE, θ is the longitude of the serving base station, d0Is the earth mean radius.
Exemplary, d0It was 6371.004X 103 m.
S2, the UE100 calculates the handover offset according to the moving speed of the UE100 and the distance between the UE100 and the serving base station where the serving cell is located.
As a possible implementation, the UE100 calculates the handover offset according to the moving speed of the UE100 and the distance between the serving base station and the UE100 by using the following formula two:
Figure BDA0002342545540000061
wherein HoffsetBiasing for switching; h is the height of the serving base station in meters; d is the distance between the serving base station and the UE100 in meters; v is the moving speed of the UE100 in units of kilometers per hour; t ishandoverThe unit is second for switching average time delay; t istimetotriggerThe delay trigger time for a handover event is in seconds.
Note that, ThandoverThe setting can be carried out by the operation and maintenance personnel according to the empirical value. Or, ThandoverOr may be obtained by the UE100 from measurement control issued by the serving base station. T istimetotriggerMay be issued by the UE100 from the serving base stationIs obtained in the measurement control of (1).
Exemplary, ThandoverMay be 0.35 s.
As a possible implementation manner, in S2 provided in the embodiment of the present invention, in order to enable the UE100 to report the handover event measurement report in advance and report the handover event measurement report again after the handover failure, the UE100 may further calculate the handover offset according to the moving speed of the UE100 and the distance between the serving base station and the UE100 by using the following formula three:
Figure BDA0002342545540000062
wherein HoffsetBiasing for switching; h is the height of the serving base station in meters; d is the distance between the serving base station and the UE100 in meters; v is the moving speed of the UE100 in units of kilometers per hour; t ishandoverThe unit is second for switching average time delay; t istimetotriggerDelay trigger time for a switching event, with the unit of second; t isoffsetFor offset time, units are taken in seconds.
Exemplary, ToffsetThe value can be Thandover。
S203, if the signal quality of the target neighboring cell and the signal quality of the serving cell satisfy the first preset condition, the UE100 reports a handover event measurement report.
Wherein the handover event measurement report is used for handover of the UE100 from the serving cell to the target neighbor cell.
As a possible implementation manner, if it is determined that the signal quality of the target neighboring cell and the signal quality of the serving cell satisfy the first preset condition, the UE100 fills the first measurement value and the second measurement value into the handover event measurement report, and sends the handover event measurement report to the serving base station.
In one possible design, as shown in fig. 2, if the UE100 determines that the signal quality of the target neighbor cell and the signal quality of the serving cell do not satisfy the first preset condition, S201 is performed again.
Optionally, to ensure that the UE100 has completely the condition for reporting the handover event measurement report, the first preset condition in the handover triggering method provided in the embodiment of the present invention specifically includes: in at least one measurement event after determining that the difference between the first measurement value and the second measurement value is greater than the first preset threshold, the difference between the first measurement value and the second measurement value is greater than the second preset threshold.
Wherein the second preset threshold value decreases as the moving speed of the UE100 increases.
It should be noted that the at least one measurement event may specifically include: and periodically measuring the signal quality of the target neighbor cell and the signal quality of the serving cell within a first preset time.
For example, the first preset time may be the average time delay of the handover. The time interval of each measurement event of the at least one measurement event may be 200 ms.
As a possible implementation manner, the second preset threshold may specifically be Ofs + Ocs + Off-Ofn-Ocn-Hoffset-Hys. Correspondingly, the first preset condition may specifically further include Mn + Ofn + Ocn + Hoffset+Hys>Ms+Ofs+Ocs+Off。
Wherein HoffsetFor handover bias, Mn is a first measured value, Ofn is a frequency specific bias of the target neighbor cell, and Ocn is a cell specific bias of the target neighbor cell; hys is a hysteresis parameter of the serving cell; ms is a second measurement; ofs is the frequency specific offset of the serving cell; ocs is the cell specific offset of the serving cell; off is the event bias for cell handover.
In the embodiment of the present invention, the handover offset increases as the moving speed of the UE100 increases.
As another possible implementation manner, in order to ensure that the UE100 can accurately trigger the handover event in the handover process, the second preset threshold may specifically be the first preset threshold in the embodiment of the present invention.
Optionally, in the handover triggering method provided in the embodiment of the present invention, a leave handover condition is further provided, where the leave handover condition specifically includes Mn + Ofn + Ocn + Hoffset+ Hys < Ms + Ofs + Ocs + Off. The handover triggering method provided by the embodiment of the present invention specifically further includes: in at least one measurement event after determining that the difference between the first measurement value and the second measurement value is greater than the first preset threshold, if the first measurement value and the second measurement value of any one measurement event satisfy the handover departure condition, the UE100 re-executes the steps S201 to S203 according to the above embodiment.
The embodiment of the invention provides a handover triggering method, which comprises the steps of after measuring the signal quality of a target neighbor cell and the signal quality of a serving cell, judging whether the signal quality of the target neighbor cell and the signal quality of the serving cell meet a first preset condition, and if so, reporting a handover event measurement report. By the technical scheme, when judging whether the difference value between the first measurement value and the second measurement value is larger than the first preset threshold value, the first preset threshold value is reduced along with the increase of the moving speed of the UE, and correspondingly, the first preset condition is relaxed along with the increase of the moving speed of the UE. It can be understood that, by using the above technical solution, compared with the UE with a slow moving speed, the UE with a fast moving speed can meet the first preset condition in advance, so that the UE with a fast moving speed reports the handover event measurement report in advance. Finally, the UE with high moving speed can be switched to the target adjacent cell from the service cell in advance relative to the UE with low moving speed, so that the technical problem of cell switching failure caused by too high vehicle speed is solved.
In order to ensure that the handover triggering method provided by the embodiment of the present invention can be executed in advance, as shown in fig. 4, the handover triggering method provided by the embodiment of the present invention specifically includes steps S301 to S303:
s301, the UE100 detects whether the UE100 satisfies a second preset condition.
When the scheme provided by the application is implemented, the content of the second preset condition can be designed according to actual needs.
In one implementation, the second preset condition may include: the UE100 moves from the serving cell to the target neighbor cell at a moving speed equal to or higher than a preset speed.
It should be noted that the preset speed can be set by the operation and maintenance staff.
For example, the preset speed may be 60 km/h.
In another implementation, the second preset condition may include: the moving speed of the UE100 is greater than or equal to the preset speed, and the signal quality identification D of the serving cellSLess than 0, and a signal quality indicator D of the target neighbor cellNGreater than 0.
Wherein D isSFor reflecting the variation of the signal strength of the serving cell reference signal received by the UE100 within the second preset time. Accordingly, DSLess than 0, for reflecting that the UE100 receives the serving cell reference signal with weakened signal strength within the second preset time. DNFor reflecting the variation of the signal strength of the UE100 receiving the target neighbor cell reference signal within the second preset time. Accordingly, DNGreater than 0, for reflecting that the UE100 receives the signal strength enhancement of the target neighbor cell reference signal within the second preset time.
Understandably, DSLess than 0, can reflect that the UE100 is leaving the serving cell. Accordingly, DNGreater than 0, can reflect that the UE100 is moving to the target neighbor cell.
When the second preset condition comprises: the moving speed of the UE100 is greater than or equal to the preset speed, and the signal quality identification D of the serving cellSLess than 0, and a signal quality indicator D of the target neighbor cellNWhen the value is greater than 0, as shown in fig. 5, S301 provided in the embodiment of the present invention may specifically further include S3011-S3017:
s3011, the UE100 acquires the moving speed of the UE 100.
It should be noted that, for a specific implementation manner of this step, reference may be made to the UE100 in the above embodiment S1 to obtain the moving speed of the UE100, which is not described herein again.
S3012, the UE100 determines whether the moving speed of the UE100 is greater than or equal to a preset speed.
S3013, if the moving speed of the UE100 is greater than or equal to the preset speed, the UE100 calculates DS。
Optionally, UE100 in S3013 according to the embodiment of the present invention calculates DSSpecifically, the method may include S30131-S30133:
s30131, the UE100 obtains m first measurement sample values within a second preset time.
Each of the m first measurement sample values is used to reflect the signal strength of the UE100 when measuring the signal quality of the serving cell for the nth time.
It should be noted that m first measurement sample values may be specifically represented as DS1，DS2，…，DSn，…，DSm。
Wherein m is a positive integer greater than 1, and n is a positive integer greater than 1 and less than or equal to m.
As a possible implementation manner, the UE100 obtains a plurality of second measurement values of the signal quality of the serving cell periodically measured by the UE100 within a second preset time, and sorts the plurality of second measurement values according to the measurement time, so as to obtain m first measurement sampling values.
The duration of the second preset time can be set by the operation and maintenance personnel.
In one possible design, the second preset time may be set according to the following formula four:
T＝2λTtimetotriggerformula four
Wherein T is a second preset time; λ is a correction coefficient; t istimetotriggerDelay trigger time for a switching event, with the unit of second;
note that lambda is more than or equal to 1; λ may increase with increasing handover zone area between the serving cell and the target neighbor cell; or λ can be set by operation and maintenance personnel in practical application.
Exemplarily, λ ═ 1.
S30132, the UE100 generates m-1 first intermediate sample values.
Wherein, each of the m-1 first intermediate sample values is used to reflect the change of the signal strength of the serving cell reference signal received by the UE100 in the time interval of two consecutive measurements of the serving cell signal quality.
M-1 to the specificationAn intermediate sample value, which may be denoted in particular by DSP1,DSP2,…DSPn-1，…，DSPm-1。
As a possible design, in the embodiment of the present invention, if DSn-DSn-1If > 0, then DSPn-11 is ═ 1; if D isSn-DSn-1If < 0, then DSPn-1＝-1。
S30133, UE100 calculates D according to m-1 first intermediate sample valuesS。
As a possible implementation, the UE100 calculates D according to m-1 first intermediate sample values by using the following formula fiveS：
DS＝DSP1+DSP2+…DSPn-1+…+DSPm-1Formula five
Wherein D isSA signal quality identification for a serving cell; dSPn-1Is the (n-1) th first intermediate sample value.
S3014, UE100 determines DSWhether less than 0.
S3015, if DSLess than 0, the UE100 calculates DN。
Optionally, UE100 in S3015 according to the embodiment of the present invention calculates DNSpecifically, the method may include S30151-S30153:
s30151, the UE100 obtains j second measurement sample values within a second preset time.
Each of the j second measurement sample values is used to reflect the signal strength of the UE100 when measuring the signal quality of the target neighboring cell at the kth time.
It should be noted that j second measurement sample values may be specifically represented as DN1，DN2，…，DNk，…，DNj。
Wherein j is a positive integer greater than 1, and k is a positive integer greater than 1 and less than or equal to j.
As a possible implementation manner, the UE100 obtains a plurality of first measurement values of the signal quality of the target neighboring cell periodically measured by the UE100 within a second preset time, and sorts the plurality of first measurement values in sequence according to the measurement time, so as to obtain j second measurement sampling values.
S30152, the UE100 generates j-1 second intermediate sample values.
Wherein, each of the j-1 second intermediate sample values is used to reflect the change of the signal strength of the reference signal of the target neighboring cell received by the UE100 in the time interval of two consecutive measurements of the signal quality of the target neighboring cell.
It should be noted that j-1 second intermediate sample values can be specifically represented as DNQ1,DNQ2,…DNQk-1，…，DNQj-1。
As a possible design, in the embodiment of the present invention, if DNk-DNk-1If > 0, then DNQk-11 is ═ 1; if D isNk-DNk-1If < 0, then DNQk-1＝-1。
S30153, UE100 calculates D according to j-1 second intermediate sample valuesN。
As a possible implementation manner, the UE100 calculates D according to j-1 second intermediate sampling values by using the following formula sixN：
DN＝DNQ1+DNQ2+…DNQk-1+…+DNQj-1Formula six
Wherein D isNIdentifying signal quality of a target neighbor cell; dNQk-1Is the (k-1) th second intermediate sample value.
S3016, UE100 determines DNWhether greater than 0.
S3017, if DNIf greater than 0, the UE100 determines that the UE100 satisfies the second preset condition.
In one possible design, as shown in fig. 5, if the moving speed of the UE100 is less than the preset speed, S3018: the UE100 determines that the UE100 does not satisfy the second preset condition.
In one possible design, as shown in fig. 5, if UE100 determines DSIf not, S3018: the UE100 determines that the UE100 does not satisfy the second preset condition.
In one possible design, as shown in fig. 5, if UE100 determines DNIs less than or equal to0, then execute S3018: the UE100 determines that the UE100 does not satisfy the second preset condition.
S302, if the UE100 satisfies the second preset condition, the UE100 determines whether the signal quality of the target neighboring cell and the signal quality of the serving cell satisfy the first preset condition.
It should be noted that, in this step, the UE100 may refer to the embodiment S202 for a specific implementation manner of determining whether the signal quality of the target neighboring cell and the signal quality of the serving cell satisfy the first preset condition, and details are not repeated here.
In a possible design, this step may also be implemented as a specific implementation manner of the above embodiment S202.
S303, if the UE100 determines that the signal quality of the target neighboring cell and the signal quality of the serving cell satisfy the first preset condition, the UE100 reports a handover event measurement report.
It should be noted that, for a specific implementation manner of this step, reference may be made to the foregoing embodiment S203, which is not described herein again.
In one possible design, as shown in fig. 4, if the UE100 determines that the signal quality of the target neighboring cell and the signal quality of the serving cell do not satisfy the first preset condition, the UE100 re-executes the step S301.
In the handover triggering method provided in the embodiment of the present invention, in an actual application process, the UE100 moves from the serving cell to the target neighboring cell at a moving speed greater than or equal to a preset speed, as a second preset condition. If the UE100 satisfies the second predetermined condition, it is determined whether the signal quality of the target neighboring cell and the signal quality of the serving cell satisfy the first predetermined condition. Through the technical characteristics, the UE100 can determine in advance whether the signal quality of the target neighbor cell and the signal quality of the serving cell need to be judged to meet the first preset condition, relative to the UE with a slow moving speed. Therefore, the UE100 can report the handover event measurement report in advance on the basis that the UE100 satisfies the second preset condition and the first preset condition, relative to the UE with a slow moving speed. Finally, when the moving speed is too high, the UE100 can be switched from the serving cell to the target neighbor cell in advance.
The embodiment of the present invention may perform division of the functional modules or functional units on the client terminal device according to the above method example, for example, each functional module or functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module may be implemented in a form of hardware, or may be implemented in a form of a software functional module or a functional unit. The division of the modules or units in the embodiments of the present invention is schematic, and is only a logic function division, and there may be another division manner in actual implementation.
In the case of adopting a method of dividing each function module corresponding to each function, an embodiment of the present invention provides a possible structural schematic diagram of the UE100 in the foregoing embodiment, as shown in fig. 6, the UE100 includes a measuring unit 101, a determining unit 102, and a reporting unit 103.
A measurement unit 101 is configured to measure the signal quality of the target neighbor cell and the signal quality of the serving cell of the UE 100. Wherein the target neighbor cell comprises one of the neighbor cells of the serving cell.
A determining unit 102, configured to determine whether the signal quality of the target neighboring cell and the signal quality of the serving cell measured by the measuring unit 101 satisfy a first preset condition. Wherein, the first preset condition comprises: the difference value between a first measurement value obtained by measuring the signal quality of the target neighbor cell and a second measurement value obtained by measuring the signal quality of the serving cell in one measurement event is larger than a first preset threshold value. Wherein the first preset threshold value decreases as the moving speed of the UE100 increases. The first measurement value is positively correlated with the signal quality of the target neighbor cell and the second measurement value is positively correlated with the signal quality of the serving cell.
A reporting unit 103, configured to report a handover event measurement report if the determining unit 102 determines that the signal quality of the target neighboring cell and the signal quality of the serving cell meet a first preset condition. Wherein the handover event measurement report is used for handover of the UE100 from the serving cell to the target neighbor cell.
Optionally, the first pre-stage in the UE100 provided in the embodiment of the present inventionThe specific conditions may include Mn + Ofn + Ocn + Hoffset-Hys>Ms+Ofs+Ocs+Off。
Wherein HoffsetFor handover bias, Mn is a first measured value, Ofn is a frequency specific bias of the target neighbor cell, and Ocn is a cell specific bias of the target neighbor cell; hys is a hysteresis parameter of the serving cell; ms is a second measurement; ofs is the frequency specific offset of the serving cell; ocs is the cell specific offset of the serving cell; off is the event bias for cell handover.
Here, the handover offset increases as the moving speed of the UE100 increases.
Optionally, in the UE100 provided in the embodiment of the present invention, the first preset condition further includes: in at least one measurement event after determining that the difference between the first measurement value and the second measurement value is greater than the first preset threshold, the difference between the first measurement value and the second measurement value is greater than the second preset threshold. Wherein the second preset threshold value decreases as the moving speed of the UE100 increases.
Optionally, as shown in fig. 7, the UE100 provided in the embodiment of the present invention specifically further includes an obtaining unit 104 and a calculating unit 105.
An obtaining unit 104 is configured to obtain a moving speed of the UE100 and a distance between a base station where a serving cell is located and the UE 100.
A calculating unit 105, configured to calculate a handover offset according to the moving speed of the UE100 acquired by the acquiring unit 104 and a distance between a base station where the serving cell is located and the UE 100.
Optionally, as shown in fig. 7, the UE100 provided in the embodiment of the present invention specifically further includes a detection unit 106.
A detecting unit 106, configured to detect whether the UE100 satisfies a second preset condition. Wherein the second preset condition comprises: the UE100 moves from the serving cell to the target neighbor cell at a moving speed equal to or higher than a preset speed.
The determining unit 102 is specifically configured to determine whether the signal quality of the target neighboring cell and the signal quality of the serving cell meet the first preset condition if the detecting unit 106 determines that the UE100 meets the second preset condition.
Optionally, the detection unit 106 provided in the embodiment of the present invention may specifically include an obtaining subunit 1061, a determining subunit 1062, a calculating subunit 1063, and a determining subunit 1064.
The acquiring subunit 1061 is configured to acquire a moving speed of the UE 100.
The determining subunit 1062 is configured to determine whether the moving speed acquired by the acquiring subunit 1061 is greater than or equal to a preset speed.
A calculating subunit 1063, configured to calculate D if the determining subunit 1062 determines that the moving speed of the UE100 is greater than or equal to the preset speedS。
A judgment subunit 1062, further configured to judge the D calculated by the calculation subunit 1063SWhether less than 0.
A calculating subunit 1063, further configured to determine D if the determining subunit 1062 determines DSIf less than 0, D is calculatedN。
A judgment subunit 1062, further configured to judge the D calculated by the calculation subunit 1063NWhether greater than 0.
A determining subunit 1064, further configured to determine D if the determining subunit 1062 determines DNAnd if the second preset condition is greater than 0, determining that the UE100 meets the second preset condition.
Optionally, the detection unit 106 provided in the embodiment of the present invention may further include a generation subunit 1065.
The obtaining subunit 1061 is specifically configured to obtain m first measurement sample values within a second preset time.
The generating subunit 1065 is specifically configured to generate m-1 first intermediate sample values after the acquiring subunit 1061 acquires the m first measurement sample values.
The calculating subunit 1063 is further configured to calculate D according to the m-1 first intermediate sample values generated by the generating subunit 1065S。
Optionally, the obtaining subunit 1061 provided in the embodiment of the present invention is further specifically configured to obtain j second measurement sample values within a second preset time.
The generating subunit 1065 is further configured to generate j-1 second intermediate sample values after the acquiring subunit 1061 acquires j second measurement sample values.
The calculating subunit 1063 is further configured to calculate D according to the j-1 second intermediate sample values generated by the generating subunit 1065N。
Fig. 8 shows a schematic diagram of another possible structure of the UE100 involved in the above embodiments. The UE100 includes: a processor 402 and a communication interface 403. The processor 402 is used to control and manage the actions of the device, for example, to perform the various steps in the method flows shown in the above-described method embodiments, and/or to perform other processes for the techniques described herein. The communication interface 403 is used to support communication of the UE100 with other network entities. The UE100 may also include a memory 401 and a bus 404, the memory 401 being used to store program codes and data for the devices.
The processor 402 may implement or execute various illustrative logical blocks, units, and circuits described in connection with the present disclosure. The processor may be a central processing unit, general purpose processor, digital signal processor, application specific integrated circuit, field programmable gate array or other programmable logic device, transistor logic device, hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, units, and circuits described in connection with the present disclosure. A processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, a DSP and a microprocessor, or the like.
Memory 401 may include volatile memory, such as random access memory; the memory may also include non-volatile memory, such as read-only memory, flash memory, a hard disk, or a solid state disk; the memory may also comprise a combination of memories of the kind described above.
The bus 404 may be an Extended Industry Standard Architecture (EISA) bus or the like. The bus 404 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 8, but this is not intended to represent only one bus or type of bus.
It is clear to those skilled in the art from the foregoing description of the embodiments that, for convenience and simplicity of description, the foregoing division of the functional units is merely used as an example, and in practical applications, the above function distribution may be performed by different functional units according to needs, that is, the internal structure of the device may be divided into different functional units to perform all or part of the above described functions. For the specific working processes of the system, the apparatus and the unit described above, reference may be made to the corresponding processes in the foregoing method embodiments, and details are not described here again.
The embodiment of the present invention further provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the instructions are executed by a computer, the computer executes each step in the method flow shown in the above method embodiment.
Embodiments of the present invention provide a computer program product comprising instructions which, when run on a computer, cause the computer to perform the handover triggering method described in the above method embodiments.
The computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, and a hard disk. Random Access Memory (RAM), Read-Only Memory (ROM), Erasable Programmable Read-Only Memory (EPROM), registers, a hard disk, an optical fiber, a portable Compact disk Read-Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any other form of computer-readable storage medium, in any suitable combination, or as appropriate in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an Application Specific Integrated Circuit (ASIC). In embodiments of the invention, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
Since the user terminal device, the computer-readable storage medium, and the computer program product in the embodiments of the present invention may be applied to the method described above, for technical effects that can be obtained by the method, reference may also be made to the method embodiments described above, and details of the embodiments of the present invention are not repeated herein.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions within the technical scope of the present invention are intended to be covered by the scope of the present invention.

Claims (10)

1. A method for triggering handover, applied to a User Equipment (UE), includes:
measuring a signal quality of a target neighbor cell and a signal quality of a serving cell of the UE; wherein the target neighbor cell comprises one of neighbor cells of the serving cell;
judging whether the signal quality of the target neighbor cell and the signal quality of the serving cell meet a first preset condition or not; wherein the first preset condition comprises: the difference value between a first measurement value obtained by measuring the signal quality of a target neighbor cell and a second measurement value obtained by measuring the signal quality of a serving cell in a measurement event is larger than a first preset threshold value; wherein the first preset threshold value is decreased with the increase of the UE moving speed; the first measurement value positively correlates with a signal quality of a target neighbor cell, and the second measurement value positively correlates with a signal quality of the serving cell; the first preset condition specifically comprises
Mn+Ofn+Ocn+Hoffset-Hys>Ms+Ofs+Ocs+Off；
Wherein HoffsetFor handover biasing, Mn is the first measurement value, Ofn is the frequency specific bias of the target neighbor cell, Ocn is the target neighbor cellA cell-specific offset for a cell; hys is a hysteresis parameter of the serving cell; ms is the second measurement; ofs is a frequency specific offset for the serving cell; the Ocs is a cell-specific offset for the serving cell; off is the event bias for cell handover;
acquiring the moving speed of the UE and the distance between a service base station where the service cell is located and the UE;
calculating a handover offset according to the moving speed of the UE and the distance between the serving base station and the UE; the calculation formula of the switching bias comprises:
Figure FDA0003243125350000011
Figure FDA0003243125350000012
wherein HoffsetBiasing for switching; h is the height of the serving base station; d is the distance between the serving base station and the UE; v is the moving speed of the UE; t ishandoverAverage time delay for handover; t istimetotriggerA delay trigger time for a handover event;
if the signal quality of the target neighbor cell and the signal quality of the serving cell meet the first preset condition, reporting a handover event measurement report; wherein the handover event measurement report is used to handover the UE from the serving cell to the target neighbor cell.
2. The handover trigger method of claim 1,
the handover offset increases as the UE movement speed increases.
3. The handover trigger method according to claim 1, wherein the first preset condition further comprises: in at least one measurement event after determining that the difference between the first measurement value and the second measurement value is greater than the first preset threshold, the difference between the first measurement value and the second measurement value is greater than a second preset threshold; wherein the second preset threshold is decreased as the UE moving speed is increased.
4. The handover triggering method according to any one of claims 1 to 3, wherein before the determining whether the signal quality of the target neighbor cell and the signal quality of the serving cell satisfy a first preset condition, the method further comprises:
detecting whether the UE meets a second preset condition; wherein the second preset condition comprises: the UE moves from the serving cell to the target neighbor cell at a moving speed greater than or equal to a preset speed;
the determining whether the signal quality of the target neighboring cell and the signal quality of the serving cell satisfy a first preset condition specifically includes:
and if the UE meets the second preset condition, judging whether the signal quality of the target neighbor cell and the signal quality of the serving cell meet the first preset condition.
5. A user terminal equipment UE is characterized in that the UE comprises a measuring unit, a judging unit, a reporting unit, an acquiring unit and a calculating unit;
the measurement unit is used for measuring the signal quality of a target neighbor cell and the signal quality of a serving cell of the UE; wherein the target neighbor cell comprises one of neighbor cells of the serving cell;
the judging unit is configured to judge whether the signal quality of the target neighboring cell and the signal quality of the serving cell measured by the measuring unit satisfy a first preset condition; wherein the first preset condition comprises: the difference value between a first measurement value obtained by measuring the signal quality of a target neighbor cell and a second measurement value obtained by measuring the signal quality of a serving cell in a measurement event is larger than a first preset threshold value; wherein the first preset threshold isDecreasing with an increase in the UE movement speed; the first measurement value positively correlates with a signal quality of a target neighbor cell, and the second measurement value positively correlates with a signal quality of the serving cell; the first preset condition specifically comprises Mn + Ofn + Ocn + Hoffset-Hys>Ms+Ofs+Ocs+Off；
Wherein HoffsetFor handover biasing, Mn is the first measurement value, Ofn is a frequency specific bias of the target neighbor cell, and Ocn is a cell specific bias of the target neighbor cell; hys is a hysteresis parameter of the serving cell; ms is the second measurement; ofs is a frequency specific offset for the serving cell; the Ocs is a cell-specific offset for the serving cell; off is the event bias for cell handover;
the acquiring unit is configured to acquire a moving speed of the UE and a distance between a serving base station where the serving cell is located and the UE;
the calculating unit is configured to calculate the handover offset according to the moving speed of the UE acquired by the acquiring unit and the distance between the serving base station and the UE; the calculation formula of the switching bias comprises:
Figure FDA0003243125350000031
Figure FDA0003243125350000032
wherein HoffsetBiasing for switching; h is the height of the serving base station; d is the distance between the serving base station and the UE; v is the moving speed of the UE; t ishandoverAverage time delay for handover; t istimetotriggerA delay trigger time for a handover event;
the reporting unit is configured to report a handover event measurement report if the determining unit determines that the signal quality of the target neighboring cell and the signal quality of the serving cell meet the first preset condition; wherein the handover event measurement report is used to handover the UE from the serving cell to the target neighbor cell.
6. The UE of claim 5,
the handover offset increases as the UE movement speed increases.
7. The UE of claim 5, wherein the first preset condition further comprises: in at least one measurement event after determining that the difference between the first measurement value and the second measurement value is greater than the first preset threshold, the difference between the first measurement value and the second measurement value is greater than a second preset threshold; wherein the second preset threshold is decreased as the UE moving speed is increased.
8. The UE of any one of claims 5-7, wherein the UE further comprises a detection unit;
the detection unit is used for detecting whether the UE meets a second preset condition; wherein the second preset condition comprises: the UE moves from the serving cell to the target neighbor cell at a moving speed greater than or equal to a preset speed;
the determining unit is specifically configured to determine whether the signal quality of the target neighboring cell and the signal quality of the serving cell meet a first preset condition if the detecting unit determines that the UE meets the second preset condition.
9. A computer readable storage medium storing one or more programs, the one or more programs comprising instructions; the instructions, when executed by a computer, cause the computer to perform the handover triggering method of any one of claims 1-4.
10. A user equipment, UE, comprising: a processor, a memory, and a communication interface; wherein, the communication interface is used for the UE to communicate with other equipment or a network; the memory is used for storing one or more programs, the one or more programs including computer executable instructions, which when executed by the processor, cause the UE to perform the handover triggering method of any one of claims 1 to 4.
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