CN105592495B - Pilot frequency measurement threshold configuration method and device - Google Patents

Pilot frequency measurement threshold configuration method and device Download PDF

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Publication number
CN105592495B
CN105592495B CN201410572974.7A CN201410572974A CN105592495B CN 105592495 B CN105592495 B CN 105592495B CN 201410572974 A CN201410572974 A CN 201410572974A CN 105592495 B CN105592495 B CN 105592495B
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cell
rsrp
pilot frequency
measurement
threshold
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CN105592495A (en
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胡成冈
牟振宁
王坤
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Nanjing ZTE New Software Co Ltd
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Nanjing ZTE New Software Co Ltd
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    • H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract

The invention discloses a pilot frequency measurement threshold configuration method and a pilot frequency measurement threshold configuration device. The method comprises the following steps: receiving measurement information reported by User Equipment (UE); when a pilot frequency adjacent region meeting set conditions exists in the adjacent region, determining a pilot frequency measurement starting threshold according to the measurement information; and sending the determined pilot frequency measurement starting threshold to the UE through a fourth reconfiguration message. When the switching to the pilot frequency adjacent region is judged to be needed, the pilot frequency measurement starting threshold is determined according to the measurement information reported by the user terminal, so that the pilot frequency measurement can be started more accurately, the invalid pilot frequency measurement is reduced as much as possible, and the user perception is improved.

Description

Pilot frequency measurement threshold configuration method and device
Technical Field
The present invention relates to the field of communications, and in particular, to a method and an apparatus for configuring a pilot frequency measurement threshold.
Background
The pilot frequency networking is a main component of the current wireless communication networking, and has the advantages of reducing the interference among cells, and the pilot frequency networking is mainly applied to indoor coverage, hot spot coverage, cross coverage and the like at present, but a key problem exists in the networking modes, namely, if a User Equipment (UE) wants to be switched to a pilot frequency network, pilot frequency measurement needs to be started in advance, a measurement event is reported to a base station according to a measurement result, the base station determines whether to switch, and the pilot frequency measurement needs to be started after the UE is synchronized to the pilot frequency network at regular time, so that the UE cannot perform normal service in an access cell at the moment, according to the existing L TE (L ong terminal, long Term Evolution) related protocol, after the pilot frequency measurement is started, the scheduling time which the UE actually can only be used is 3/4 or 7/8 before the UE is closed, if the timing for starting the pilot frequency measurement is not right, great loss of flow and time delay can be caused, because the pilot frequency coverage of different areas at present is different, one set or a plurality of configuration parameters cannot meet the default requirements, and the problem that if the pilot frequency measurement is started is not required by a pilot frequency measurement parameter configuration is solved.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a pilot frequency measurement threshold configuration method and a pilot frequency measurement threshold configuration device, which are used for solving the problem that the pilot frequency measurement starting threshold in the prior art is difficult to configure accurately.
In order to solve the above technical problem, in one aspect, the present invention provides a method for configuring a pilot frequency measurement threshold, including:
receiving measurement information reported by User Equipment (UE);
when a pilot frequency adjacent region meeting set conditions exists in the adjacent region, determining a pilot frequency measurement starting threshold according to the measurement information;
and sending the determined pilot frequency measurement starting threshold to the UE through a fourth reconfiguration message.
Further, the setting condition is any one of the following conditions:
a. the reference signal received power RSRP value of the pilot frequency adjacent cell is larger than the RSRP values of all the same-frequency adjacent cells;
b. the RSRP value of the pilot frequency adjacent cell is larger than a preset threshold value O; and P is not less than O and not more than Q, P is the minimum value of RSRP in the same-frequency adjacent cells, and Q is the maximum value of RSRP in the same-frequency adjacent cells.
Further, before receiving the measurement information, the method further includes:
issuing a first reconfiguration message to UE, wherein the first reconfiguration message comprises:
1) adding an A3 event, and setting a threshold value of the A3 event reported by the UE; when the difference between the Reference Signal Received Power (RSRP) of the adjacent cell and the RSRP of the cell where the UE is located is higher than the threshold value, reporting an A3 event;
2) adding an A2 event, and setting a threshold value of the A2 event reported by the UE; that is, when the RSRP of the cell in which the UE is located is lower than the threshold, the a2 event is reported.
Further, when receiving an a2 event reported by the UE, issuing a second reconfiguration message to the UE, where the second reconfiguration message includes:
1) deleting the A2 event;
2) and starting the command of pilot frequency measurement.
Further, before receiving the measurement information, the method further includes:
issuing a fifth reconfiguration message to the UE, wherein the fifth reconfiguration message comprises:
1) adding an A3 event, and setting a threshold value of the A3 event reported by the UE; when the difference between the Reference Signal Received Power (RSRP) of the adjacent cell and the RSRP of the cell where the UE is located is higher than the threshold value, reporting an A3 event;
2) and starting the command of pilot frequency measurement.
Further, receiving measurement information reported by the user equipment UE specifically includes:
and when the A3 event reported by the UE is received, recording the measurement information reported by the UE.
Further, when a preset timer is overtime or the stored measurement message exceeds a storage threshold, closing the timer and simultaneously issuing a third reconfiguration message, wherein the third reconfiguration message comprises:
1) deleting the A3 event;
2) and closing the command of pilot frequency measurement.
Further, when the a2 event configured in the UE is not deleted, the third reconfiguration message further includes:
3) and deleting the A2 event.
Further, the measurement information includes:
the method comprises the following steps that location information of UE, a physical cell identity identification number PCI of a cell and reference signal received power RSRP of the cell are obtained;
PCI and RSRP of each same-frequency adjacent cell;
and the PCI and the RSRP of each pilot frequency adjacent cell.
Further, after receiving the measurement information, the method further includes:
rasterizing an area covered by a cell according to the position information of the UE;
and merging the measurement information reported by all the UE belonging to the same grid.
Further, when combining the measurement information reported by all UEs belonging to the same grid, at least one of the following methods is used for combining:
accumulating RSRPs of cells measured by all UEs in the same grid and taking an average value;
accumulating and averaging the RSRPs of the same-frequency neighboring cells with the same PCI measured by all the UEs in the same grid;
and accumulating and averaging the RSRPs of all the pilot frequency adjacent cells with the same PCI measured in the same grid.
Further, when a pilot frequency adjacent region meeting set conditions exists in an adjacent region of a cell boundary, determining a pilot frequency measurement starting threshold according to the measurement information; the boundary is a region in which the difference between the RSRP of the cell and the maximum RSRP of the neighboring cells is within a set range.
Further, when there is only one pilot frequency neighboring cell satisfying the set condition in the neighboring cells of the cell boundary, the pilot frequency measurement starting threshold is R, where R ═ Rc±Rp；RcThe RSRP of the boundary corresponding to the pilot frequency adjacent cell in the cell; rpIs an offset value.
Further, when there is more than one pilot frequency neighboring cell satisfying the set condition among the neighboring cells of the cell boundary, the pilot frequency measurement starting threshold is R, where R ═ Rc±Rp；RcIs a measurement value of a cell; rpAs offset values: determining R by any of the following meansc：
1) Searching the pilot frequency adjacent cell with the most corresponding cell boundary in a plurality of pilot frequency adjacent cells meeting set conditions, and recording R (reference signal received power) value of the boundary corresponding to the pilot frequency adjacent cell in the cellc；
2) Recording R the maximum RSRP value in all boundaries in the cellc；
3) Recording R the minimum RSRP value in all boundaries in the cellc；
4) Recording the average value of RSRP of all boundaries in the cell as Rc。
In another aspect, the present invention further provides a device for configuring a pilot frequency measurement threshold, including:
the measurement information acquisition unit is used for receiving measurement information reported by the user terminal UE;
a pilot frequency measurement starting threshold determining unit, configured to determine a pilot frequency measurement starting threshold according to the measurement information when a pilot frequency neighbor cell satisfying a set condition exists in the neighbor cell;
and the sending unit is used for sending the determined pilot frequency measurement starting threshold to the UE through a fourth reconfiguration message.
Further, the setting condition is any one of the following conditions:
a. the reference signal received power RSRP value of the pilot frequency adjacent cell is larger than the RSRP values of all the same-frequency adjacent cells;
b. the RSRP value of the pilot frequency adjacent cell is larger than a preset threshold value O; and P is not less than O and not more than Q, P is the minimum value of RSRP in the same-frequency adjacent cells, and Q is the maximum value of RSRP in the same-frequency adjacent cells.
Further, the measurement information acquisition unit is further configured to:
before receiving the measurement information, issuing a first reconfiguration message to the UE, wherein the first reconfiguration message comprises:
1) adding an A3 event, and setting a threshold value of the A3 event reported by the UE; when the difference between the Reference Signal Received Power (RSRP) of the adjacent cell and the RSRP of the cell where the UE is located is higher than the threshold value, reporting an A3 event;
2) adding an A2 event, and setting a threshold value of the A2 event reported by the UE; that is, when the RSRP of the cell in which the UE is located is lower than the threshold, the a2 event is reported.
Further, the measurement information acquisition unit is further configured to:
when receiving an A2 event reported by the UE, issuing a second reconfiguration message to the UE, wherein the second reconfiguration message comprises:
1) deleting the A2 event;
2) and starting the command of pilot frequency measurement.
Further, the measurement information acquisition unit is further configured to:
before receiving the measurement information, issuing a fifth reconfiguration message to the UE, where the fifth reconfiguration message includes:
1) adding an A3 event, and setting a threshold value of the A3 event reported by the UE; when the difference between the Reference Signal Received Power (RSRP) of the adjacent cell and the RSRP of the cell where the UE is located is higher than the threshold value, reporting an A3 event;
2) and starting the command of pilot frequency measurement.
Further, the measurement information acquisition unit is further configured to:
and when the A3 event reported by the UE is received, recording the measurement information reported by the UE.
Further, the measurement information acquisition unit is further configured to:
when a preset timer exceeds or a stored measurement message exceeds a storage threshold, closing the timer and simultaneously issuing a third reconfiguration message, wherein the third reconfiguration message comprises:
1) deleting the A3 event;
2) and closing the command of pilot frequency measurement.
Further, the measurement information acquisition unit is further configured to:
when the a2 event configured in the UE is not deleted, the third reconfiguration message further includes:
3) and deleting the A2 event.
Further, the measurement information includes:
the method comprises the following steps that location information of UE, a physical cell identity identification number PCI of a cell and reference signal received power RSRP of the cell are obtained;
PCI and RSRP of each same-frequency adjacent cell;
and the PCI and the RSRP of each pilot frequency adjacent cell.
Further, the pilot frequency measurement starting threshold determining unit is further configured to:
rasterizing an area covered by a cell according to the position information of the UE;
and merging the measurement information reported by all the UE belonging to the same grid.
Further, the pilot frequency measurement starting threshold determining unit is further configured to:
when the measurement information reported by all the UE belonging to the same grid is merged, at least one of the following modes is adopted for merging:
accumulating RSRPs of cells measured by all UEs in the same grid and taking an average value;
accumulating and averaging the RSRPs of the same-frequency neighboring cells with the same PCI measured by all the UEs in the same grid;
and accumulating and averaging the RSRPs of all the pilot frequency adjacent cells with the same PCI measured in the same grid.
Further, the pilot frequency measurement starting threshold determining unit is further configured to:
when a pilot frequency adjacent region meeting set conditions exists in an adjacent region of a cell boundary, determining a pilot frequency measurement starting threshold according to the measurement information; the boundary is a region in which the difference between the RSRP of the cell and the maximum RSRP of the neighboring cells is within a set range.
Further, the pilot frequency measurement starting threshold determining unit is further configured to:
when only one pilot frequency adjacent cell meeting the set condition exists in the adjacent cells of the cell boundary, the pilot frequency measurement starting threshold is R, wherein R is Rc±Rp；RcThe RSRP of the boundary corresponding to the pilot frequency adjacent cell in the cell; rpIs an offset value.
Further, the pilot frequency measurement starting threshold determining unit is further configured to:
when there is more than one pilot frequency adjacent cell meeting the set condition in the adjacent cells of the cell boundary, the pilot frequency measurement starting threshold is R, wherein R is Rc±Rp；RcIs a measurement value of a cell; rpAs offset values: determining R by any of the following meansc：
1) Searching the pilot frequency adjacent cell with the most corresponding cell boundary in a plurality of pilot frequency adjacent cells meeting set conditions, and recording R (reference signal received power) value of the boundary corresponding to the pilot frequency adjacent cell in the cellc；
2) Recording R the maximum RSRP value in all boundaries in the cellc；
3) Recording R the minimum RSRP value in all boundaries in the cellc；
4) Recording the average value of RSRP of all boundaries in the cell as Rc。
The invention has the following beneficial effects:
when the switching to the pilot frequency adjacent region is judged to be needed, the pilot frequency measurement starting threshold is determined according to the measurement information reported by the user terminal, so that the pilot frequency measurement can be started more accurately, the invalid pilot frequency measurement is reduced as much as possible, and the user perception is improved.
Drawings
Fig. 1 is a schematic diagram of non-flower arrangement coverage in an existing inter-frequency networking;
fig. 2 is a schematic diagram of a coverage of a plug in an existing inter-frequency networking;
fig. 3 is a flowchart of a pilot frequency measurement threshold configuration method according to an embodiment of the present invention;
FIG. 4 is a detailed flow chart of data collection according to an embodiment of the present invention;
FIG. 5 is a detailed flow chart of another embodiment of data collection;
FIG. 6 is a flow chart illustrating data analysis in accordance with an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an inter-frequency measurement threshold configuration apparatus in an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail below with reference to the drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
The core of the invention is to analyze the collected data (the measurement information reported by the user terminal), finally find out the optimal threshold for starting the pilot frequency measurement, and send the optimal threshold to the UE.
The main purpose of the analysis is to find out the area of the best on-off inter-frequency measurement according to the position reported by the UE and the measurement value, and to calculate the time of the best on-off inter-frequency measurement according to the measurement value of the area.
Currently, the different frequency networking modes are roughly divided into three types: insert pattern, hot spot coverage, indoor and outdoor coverage.
For indoor and outdoor coverage and hot spot coverage, the coverage modes of the two scenarios can be simply considered as the mode based on the coverage of fig. 1, that is, the cell a and the cell B are the inter-frequency neighboring cell relationship, and the area HO1 is a handover area for handover from B to a when the UE moves forward from the cell B to the cell a; while the area HO2 is a handover area for handover from a to B when the UE moves forward from cell a to cell B, and the area CFG3 is an area for enabling inter-frequency measurement from a to B or from B to a, for this type of coverage, since there is only one inter-frequency neighbor, there is only one calculated threshold for enabling inter-frequency measurement.
For the flower arrangement type coverage, the coverage mode is complex and can be considered as the coverage mode of fig. 2 approximately, under the condition of flower arrangement and network distribution, a plurality of cells are covered in a cross mode, a cell a and cells B and C are in different-frequency adjacent cell relation, B and C are in same-frequency relation, other cells are ignored, and the meanings of areas 1-4 marked in fig. 2 are shown in table 1.
TABLE 1
Figure BDA0000592898030000081
For the flower arrangement type coverage, the coverage mode has a plurality of different frequency adjacent regions, so that a plurality of different frequency point thresholds can be calculated, and therefore a different frequency threshold value needs to be extracted from a plurality of threshold values, and the extraction method includes but is not limited to: and taking the maximum value, the minimum value, the average value and the threshold value corresponding to the sampling point at most.
As shown in fig. 3, an embodiment of the present invention relates to a method for configuring a pilot frequency measurement threshold, including:
step S101, receiving measurement information reported by User Equipment (UE);
in this step, data information of all user equipments UEs in the cell is mainly collected, and the mainly collected information includes:
1) location information of the UE, such as longitude and latitude;
2) cell PCI (Physical Cell Identification number) -RSRP (Reference Signal Receiving Power);
3) the same-frequency adjacent cell 1 PCI-RSRP, the same-frequency adjacent cell 2 PCI-RSRP and the same-frequency adjacent cell 3 PCI-RSRP … …;
4) the pilot frequency adjacent cell comprises a pilot frequency adjacent cell 1 PCI-RSRP, a pilot frequency adjacent cell 2 PCI-RSRP and a pilot frequency adjacent cell 3 PCI-RSRP … ….
Step S102, judging whether a pilot frequency adjacent cell meeting set conditions exists in the adjacent cells according to the measurement information, and if so, determining a pilot frequency measurement starting threshold according to the measurement information; if not, setting a pre-configured threshold value as a pilot frequency measurement starting threshold;
in this step, the setting condition is preset, and may be any one of the following conditions:
a. the reference signal received power RSRP value of the pilot frequency adjacent cell is larger than the RSRP values of all the same-frequency adjacent cells;
b. the RSRP value of the pilot frequency adjacent cell is larger than a preset threshold value O; and P is not less than O and not more than Q, P is the minimum value of RSRP in the same-frequency adjacent cells, and Q is the maximum value of RSRP in the same-frequency adjacent cells. For example, O is set as the average value of RSRP in the intra-frequency neighborhood.
There may be multiple neighbors of the UE, namely: including a plurality of (possibly one) same-frequency adjacent regions and/or a plurality of (possibly one) different-frequency adjacent regions. Taking the condition a as an example, searching the same-frequency adjacent region with the maximum RSRP firstly; then comparing the RSRP with the pilot frequency adjacent cells, and if the RSRP of the pilot frequency adjacent cells is large, judging the adjacent cell with the maximum RSRP in the adjacent cells as the pilot frequency adjacent cell, namely, the pilot frequency adjacent cell meeting set conditions exists in the adjacent cells; otherwise, the adjacent cell with the maximum RSRP in the adjacent cells is judged to be the same-frequency adjacent cell, namely, the different-frequency adjacent cell meeting the set condition does not exist in the adjacent cells.
Step S103, the determined pilot frequency measurement starting threshold is sent to the UE through a fourth reconfiguration message.
In this embodiment, whether the neighboring cell with the largest RSRP in the neighboring cells is the pilot frequency neighboring cell is judged, and if so, it indicates that it is better to switch the UE to the pilot frequency neighboring cell, and at this time, the pilot frequency measurement start threshold is determined by the measurement information reported by the UE, and the pilot frequency measurement threshold of each cell can be configured as accurately as possible, so that the invalid pilot frequency measurement is reduced to the highest degree, and user perception is improved.
The above-described process of the present invention is described below by way of specific examples.
Step 201, data acquisition is carried out:
the data acquisition process is shown in fig. 4, and includes the following steps:
s2011, the base station issues a first reconfiguration message, starts a timer (for example, the duration is set to 120 minutes), and the message carries the following information:
1. adding an A3 event, and setting the threshold value of the A3 event as-3, namely reporting the event when the RSRP of the neighboring cell is higher than the RSRP-3dbm of the cell;
2. and adding an A2 event, and setting the threshold value of the A2 event to be-80, namely reporting the event when the RSRP of the cell is lower than-80 dbm.
S2012, the UE reports the event A3 or A2 when the condition is met according to the configuration of the base station. After receiving the reporting event, the base station determines whether the event reported by the UE is an a2 event, if so, goes to step S2014, and if not, goes to step S2013.
S2013, when the base station receives the A3 event reported by the UE, the reported data information is recorded. At this time, since the inter-frequency measurement has not been started yet, the data information included in the event a3 reported at this time is: and the position information of each UE in the cell and the RSRP of the adjacent cells with the same frequency.
S2014, after receiving the a2 event, the base station issues a second reconfiguration message again, where the second reconfiguration message carries the following information:
1. delete the above-mentioned a2 event;
2. and the command for starting the pilot frequency measurement comprises the time, the period and the like of the pilot frequency measurement.
After the UE starts inter-frequency measurement, the subsequent reported a3 event will report RSRP data of the inter-frequency neighboring cell, that is: and reporting the RSRP data of the different-frequency adjacent cells meeting the conditions and the position information of the UE while reporting the RSRP data of the same-frequency adjacent cells. When reporting the RSRP data of the pilot frequency adjacent cell, reporting the RSRP of the pilot frequency adjacent cell which meets the condition according to a pilot frequency measurement starting threshold which is set by default.
S2015, if the timer is over time or the measurement message stored in the base station exceeds the storage threshold (for example, the storage threshold is 100MB), if not, returning to step S2012; if so, go to step S2016.
S2016, stop the UE reporting, close the timer, issue a third reconfiguration message at the same time, and notify the data analysis system to acquire the stored measurement information, where the third reconfiguration message carries the following information:
1. delete the above-mentioned a3 event;
2. delete the above-mentioned a2 event;
3) and closing the command of pilot frequency measurement.
It should be noted that all relevant parameters related to the present embodiment and giving specific values are configurable, and all measurement information reports need to carry location information.
In addition, during data acquisition, data of an inter-frequency adjacent region and an intra-frequency adjacent region can also be acquired simultaneously, instead of the above embodiment, the command of inter-frequency measurement is started only when the event a2 is met. As shown in fig. 5, a specific flow of the present embodiment is given, which includes:
A. the base station issues a fifth reconfiguration message, a timer (the duration is set to be 120 minutes) is started, and the fifth reconfiguration message carries the following information:
1) adding an A3 event, and setting the threshold value of the A3 event as-3, namely reporting the event when the RSRP of the neighboring cell is higher than the RSRP-3dbm of the cell;
2) and the command for starting the pilot frequency measurement comprises the time, the period and the like of the pilot frequency measurement.
B. When the base station receives the A3 events reported by the UE, the events are recorded.
And after the UE starts the pilot frequency measurement, reporting an A3 event, wherein the reported data comprises RSRP of a same-frequency adjacent cell and RSRP of a pilot frequency adjacent cell. Namely: and reporting the RSRP data of the different-frequency adjacent cells meeting the conditions and the position information of the UE while reporting the RSRP data of the same-frequency adjacent cells. When reporting the RSRP data of the pilot frequency adjacent cell, reporting the RSRP of the pilot frequency adjacent cell which meets the condition according to a pilot frequency measurement starting threshold which is set by default.
C. When the timer is overtime or the measurement message stored by the base station exceeds a storage threshold (100MB), closing the timer and simultaneously issuing a third reconfiguration message, wherein the third reconfiguration message carries the following information:
1) deleting the A3 event;
2) closing the pilot frequency measurement command;
step 202, performing data analysis:
in this step, the unit of data analysis is the cell, i.e. each cell needs to be analyzed once. The data analyzed is the data collected in step 201. The measurement information reported by the UE comprises the following contents:
1. position information: longitude and latitude;
2. cell PCI-RSRP;
3. a same-frequency adjacent region 1 PCI-RSRP, a same-frequency adjacent region 2 PCI-RSRP, a same-frequency adjacent region 3 PCI-RSRP and … …;
4. pilot frequency adjacent cell 1 PCI-RSRP, pilot frequency adjacent cell 2 PCI-RSRP, pilot frequency adjacent cell 3 PCI-RSRP, … ….
As shown in fig. 6, the specific flow of data analysis is as follows:
s2021, rasterizing the cell coverage according to the longitude and latitude information reported by the UE, where the size of the grid may be configured to be 20m × 20m or 10m × 10m, for example.
S2022, combining and storing the measurement information reported by all the UE belonging to the same grid according to the rasterized information; the merging mode is as follows:
1. accumulating the RSRPs of all the measured cells in the same grid and taking the average value;
2. accumulating and averaging the measured RSRPs of the same-frequency adjacent cells with the same PCI in the same grid;
3. and accumulating and averaging the RSRPs of all the pilot frequency adjacent cells with the same PCI measured in the same grid.
The storage mode is as follows: the method comprises the steps of rasterizing identification-cell RSRP-same-frequency neighbor cell RSRP-pilot-frequency neighbor cell RSRP.
S2023, judging whether the coverage of the pilot frequency adjacent cell is better than that of the same frequency adjacent cell, judging whether the pilot frequency adjacent cell is necessary to be switched, if so, turning to S2025, and if not, turning to S2024.
In this step, it is determined whether the different-frequency neighboring cell has better coverage than the same-frequency neighboring cell, that is, it is determined that the different-frequency neighboring cell satisfying the set condition exists in the neighboring cells, and if the different-frequency neighboring cell satisfying the set condition exists, it is determined that the different-frequency neighboring cell has better coverage than the same-frequency neighboring cell, otherwise, if the different-frequency neighboring cell satisfying the set condition does not exist, it is determined that the different-frequency neighboring cell has no better coverage than the same-frequency neighboring cell. The setting condition may be any one of the following conditions:
a. the reference signal received power RSRP value of the pilot frequency adjacent cell is larger than the RSRP values of all the same-frequency adjacent cells;
b. the RSRP value of the pilot frequency adjacent cell is larger than a preset threshold value O; and P is not less than O and not more than Q, P is the minimum value of RSRP in the same-frequency adjacent cells, and Q is the maximum value of RSRP in the same-frequency adjacent cells.
Specifically, when judging, taking a set condition a as an example (the condition a is taken as an example hereinafter), in the neighboring cells of the cell boundary, judging whether different-frequency neighboring cells with the RSRP value larger than the maximum value of the RSRP in the same-frequency neighboring cells exist, if so, judging that the coverage of the different-frequency neighboring cells is better than that of the same-frequency neighboring cells, and if not, judging that the coverage of the different-frequency neighboring cells is not better than that of the same-frequency neighboring cells.
The boundary is a region in which the difference between the RSRP of the cell and the RSRP of the strongest neighboring cell (the neighboring cell with the largest RSRP value) is within a set range. For example, the boundary may be located in a region where the cell RPRP and the strongest neighbor RSRP are the same, or may be located in a region where the cell RSRR is larger than the strongest neighbor RSRP by Ndbm (or smaller than Ndbm); and N is an error parameter. While the boundary may be a plurality of grids.
S2024, if there is no pilot frequency neighboring cell satisfying the setting condition, for example, when the setting condition is the above condition a, the neighboring cell with the strongest boundary is the same-frequency neighboring cell, it is considered that the coverage of the pilot frequency neighboring cell is not good as the same-frequency neighboring cell, and therefore it is not necessary to switch to the pilot frequency neighboring cell, thereby recording the pilot frequency measurement start threshold as a smaller value (for example, -105dbm, which is configured in advance, and different values can be configured according to different situations);
s2025, if there is an inter-frequency neighboring cell satisfying the setting condition, for example, when the setting condition is the above condition a, the neighboring cell with the strongest boundary is the inter-frequency neighboring cell, it is considered that the coverage of the inter-frequency neighboring cell is better than the same frequency, and the inter-frequency neighboring cell can be switched to.
S2026, judging whether there is only one pilot frequency adjacent cell with the maximum value of RSRP in the adjacent cells with the same frequency, if yes, turning to S2028, and if not, turning to S2027.
S2027, if there is more than one inter-frequency neighboring cell satisfying the set condition in the neighboring cells of the cell boundary, determining that there are multiple inter-frequency neighboring cells, and when this occurs, the processing method includes, but is not limited to, the following:
the pilot frequency measurement starting threshold is R, wherein R is Rc±Rp；RcIs a measurement value of a cell; rpAs offset values: determining R by any of the following meansc：
1) Searching the pilot frequency adjacent cell with the most corresponding cell boundary in a plurality of pilot frequency adjacent cells meeting set conditions, and recording R (reference signal received power) value of the boundary corresponding to the pilot frequency adjacent cell in the cellc；
2) Recording R the maximum RSRP value in all boundaries in the cellc；
3) Recording R the minimum RSRP value in all boundaries in the cellc；
4) Recording the average value of RSRP of all boundaries in the cell as Rc。
S2028, if there is only one inter-frequency neighboring cell meeting the set condition in the neighboring cells of the cell boundary, the inter-frequency measurement turn-on threshold is R, where R ═ Rc±Rp；RcThe RSRP of the boundary corresponding to the pilot frequency adjacent cell in the cell; rpIs an offset value.
R in steps S2027 and S2028pThe value of the offset can be configured in advance, and belongs to error parameters, as long as the pilot frequency measurement starting threshold is ensured to be R within the error range and RcEqual to each other.
Step 301, data sending is carried out;
in this step, when the UE accesses the cell, the cell analyzes the threshold for starting the inter-frequency measurement in the cell according to the above steps, and sends the threshold to the UE through the fourth reconfiguration message.
The main purpose of data transmission is to carry the pilot frequency measurement starting threshold in the reconfiguration message (fourth reconfiguration message) and send it to the UE when the UE accesses the base station.
It should be noted that: in this embodiment, the first reconfiguration message, the second reconfiguration message, the third reconfiguration message, the fourth reconfiguration message, and the fifth reconfiguration message are all reconfiguration messages, and only contents issued by the reconfiguration messages are different, so that the first, second, third, fourth, and fifth messages are added in the foregoing for distinction.
As shown in fig. 7, an embodiment of the present invention relates to an inter-frequency measurement threshold configuration apparatus for implementing the foregoing method, including:
a measurement information acquisition unit 401, configured to receive measurement information reported by a user equipment UE;
a pilot frequency measurement starting threshold determining unit 402, configured to determine a pilot frequency measurement starting threshold according to measurement information when a pilot frequency neighboring area meeting a set condition exists in the neighboring area;
a sending unit 403, configured to send the determined inter-frequency measurement starting threshold to the UE through a fourth reconfiguration message.
Wherein the setting condition is any one of the following conditions:
a. the reference signal received power RSRP value of the pilot frequency adjacent cell is larger than the RSRP values of all the same-frequency adjacent cells;
b. the RSRP value of the pilot frequency adjacent cell is larger than a preset threshold value O; and P is not less than O and not more than Q, P is the minimum value of RSRP in the same-frequency adjacent cells, and Q is the maximum value of RSRP in the same-frequency adjacent cells.
The measurement information acquisition unit 401 is further configured to: before receiving the measurement information, issuing a first reconfiguration message to the UE, wherein the first reconfiguration message comprises:
1) adding an A3 event, and setting a threshold value of the A3 event reported by the UE; when the difference between the Reference Signal Received Power (RSRP) of the adjacent cell and the RSRP of the cell where the UE is located is higher than the threshold value, reporting an A3 event;
2) adding an A2 event, and setting a threshold value of the A2 event reported by the UE; that is, when the RSRP of the cell in which the UE is located is lower than the threshold, the a2 event is reported.
When receiving an A2 event reported by the UE, issuing a second reconfiguration message to the UE, wherein the second reconfiguration message comprises:
1) deleting the A2 event;
2) and starting the command of pilot frequency measurement.
And when the A3 event reported by the UE is received, recording the measurement information reported by the UE.
When the preset timer exceeds or the stored measurement message exceeds the storage threshold, closing the timer and simultaneously issuing a third reconfiguration message, wherein the third reconfiguration message comprises:
1) deleting the A3 event;
2) delete a2 event;
3) and closing the command of pilot frequency measurement.
In addition, the measurement information acquisition unit 401 may also perform data acquisition on the same-frequency neighboring cell and the different-frequency neighboring cell at the same time, and is specifically configured to:
before receiving the measurement information, issuing a fifth reconfiguration message to the UE, wherein the fifth reconfiguration message comprises:
1) adding an A3 event, and setting a threshold value of the A3 event reported by the UE; when the difference between the Reference Signal Received Power (RSRP) of the adjacent cell and the RSRP of the cell where the UE is located is higher than the threshold value, reporting an A3 event;
2) and starting the command of pilot frequency measurement.
And when the A3 event reported by the UE is received, recording the measurement information reported by the UE.
When the preset timer exceeds or the stored measurement message exceeds the storage threshold, closing the timer and simultaneously issuing a third reconfiguration message, wherein the third reconfiguration message comprises:
1) deleting the A3 event;
2) and closing the command of pilot frequency measurement.
The measurement information includes: the method comprises the following steps that location information of UE, a physical cell identity identification number PCI of a cell and reference signal received power RSRP of the cell are obtained; PCI and RSRP of each same-frequency adjacent cell; and the PCI and the RSRP of each pilot frequency adjacent cell.
The inter-frequency measurement turn-on threshold determination unit 402 is further configured to:
rasterizing an area covered by a cell according to the position information of the UE;
and merging the measurement information reported by all the UE belonging to the same grid.
When the measurement information reported by all the UE belonging to the same grid is merged, at least one of the following modes is adopted for merging:
accumulating RSRPs of cells measured by all UEs in the same grid and taking an average value;
accumulating and averaging the RSRPs of the same-frequency neighboring cells with the same PCI measured by all the UEs in the same grid;
and accumulating and averaging the RSRPs of all the pilot frequency adjacent cells with the same PCI measured in the same grid.
When a pilot frequency adjacent region meeting set conditions exists in an adjacent region of a cell boundary, determining a pilot frequency measurement starting threshold according to measurement information; the boundary is a region in which the difference between the RSRP of the cell and the RSRP of the strongest neighboring cell is within a set range.
When only one pilot frequency adjacent cell meeting the set condition exists in the adjacent cells of the cell boundary, the pilot frequency measurement starting threshold is R, wherein R is Rc±Rp；RcThe RSRP of the boundary corresponding to the pilot frequency adjacent cell in the cell; rpIs an offset value.
When there is more than one pilot frequency adjacent cell meeting the set condition in the adjacent cells of the cell boundary, the pilot frequency measurement starting threshold is R, wherein R is Rc±Rp；RcIs a measurement value of a cell; rpAs offset values: determining R by any of the following meansc：
1) Searching the pilot frequency adjacent cell with the most corresponding cell boundary in a plurality of pilot frequency adjacent cells meeting set conditions, and recording R (reference signal received power) value of the boundary corresponding to the pilot frequency adjacent cell in the cellc；
2) Recording R the maximum RSRP value in all boundaries in the cellc；
3) Recording R the minimum RSRP value in all boundaries in the cellc；
4) Recording the average value of RSRP of all boundaries in the cell as Rc。
When the switching to the pilot frequency adjacent region is judged to be needed, the pilot frequency measurement starting threshold is determined according to the measurement information reported by the user terminal, so that the pilot frequency measurement can be started more accurately, the invalid pilot frequency measurement is reduced as much as possible, and the user perception is improved.
Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, and the scope of the invention should not be limited to the embodiments described above.

Claims (26)

1. A method for configuring a threshold for inter-frequency measurement, comprising:
receiving measurement information reported by User Equipment (UE);
when a pilot frequency adjacent region meeting set conditions exists in the adjacent region, determining a pilot frequency measurement starting threshold according to the measurement information;
sending the determined pilot frequency measurement starting threshold to the UE through a fourth reconfiguration message;
wherein the setting condition is any one of the following conditions: a. the reference signal received power RSRP value of the pilot frequency adjacent cell is larger than the RSRP values of all the same-frequency adjacent cells; b. the RSRP value of the pilot frequency adjacent cell is larger than a preset threshold value O; and P is not less than O and not more than Q, P is the minimum value of RSRP in the same-frequency adjacent cells, and Q is the maximum value of RSRP in the same-frequency adjacent cells.
2. The method for configuring inter-frequency measurement threshold according to claim 1, wherein before receiving the measurement information, the method further comprises:
issuing a first reconfiguration message to UE, wherein the first reconfiguration message comprises:
1) adding an A3 event, and setting a threshold value of the A3 event reported by the UE; when the difference between the Reference Signal Received Power (RSRP) of the adjacent cell and the RSRP of the cell where the UE is located is higher than the threshold value, reporting an A3 event;
2) adding an A2 event, and setting a threshold value of the A2 event reported by the UE; that is, when the RSRP of the cell in which the UE is located is lower than the threshold, the a2 event is reported.
3. The inter-frequency measurement threshold configuration method of claim 2,
when receiving an A2 event reported by the UE, issuing a second reconfiguration message to the UE, wherein the second reconfiguration message comprises:
1) deleting the A2 event;
2) and starting the command of pilot frequency measurement.
4. The method for configuring inter-frequency measurement threshold according to claim 1, wherein before receiving the measurement information, the method further comprises:
issuing a fifth reconfiguration message to the UE, wherein the fifth reconfiguration message comprises:
1) adding an A3 event, and setting a threshold value of the A3 event reported by the UE; when the difference between the Reference Signal Received Power (RSRP) of the adjacent cell and the RSRP of the cell where the UE is located is higher than the threshold value, reporting an A3 event;
2) and starting the command of pilot frequency measurement.
5. The method of claim 3 or 4, wherein receiving the measurement information reported by the UE specifically includes:
and when the A3 event reported by the UE is received, recording the measurement information reported by the UE.
6. The method according to claim 5, wherein when a preset timer expires or a stored measurement message exceeds a storage threshold, the timer is closed, and a third reconfiguration message is issued, where the third reconfiguration message includes:
1) deleting the A3 event;
2) and closing the command of pilot frequency measurement.
7. The inter-frequency measurement threshold configuration method according to claim 6, wherein when the configured a2 event in the UE is not deleted, the third reconfiguration message further comprises:
the a2 event is deleted.
8. The inter-frequency measurement threshold configuration method according to claim 1 or 7, wherein the measurement information comprises:
the method comprises the following steps that location information of UE, a physical cell identity identification number PCI of a cell and reference signal received power RSRP of the cell are obtained;
PCI and RSRP of each same-frequency adjacent cell;
and the PCI and the RSRP of each pilot frequency adjacent cell.
9. The method for configuring inter-frequency measurement threshold according to claim 8, wherein after receiving the measurement information, the method further comprises:
rasterizing an area covered by a cell according to the position information of the UE;
and merging the measurement information reported by all the UE belonging to the same grid.
10. The method of claim 9, wherein when combining the measurement information reported by all UEs belonging to the same grid, at least one of the following methods is used for combining:
accumulating RSRPs of cells measured by all UEs in the same grid and taking an average value;
accumulating and averaging the RSRPs of the same-frequency neighboring cells with the same PCI measured by all the UEs in the same grid;
and accumulating and averaging the RSRPs of all the pilot frequency adjacent cells with the same PCI measured in the same grid.
11. The inter-frequency measurement threshold configuration method according to claim 1 or 10,
when a pilot frequency adjacent region meeting set conditions exists in an adjacent region of a cell boundary, determining a pilot frequency measurement starting threshold according to the measurement information; the boundary is a region in which the difference between the RSRP of the cell and the maximum RSRP of the neighboring cells is within a set range.
12. The inter-frequency measurement threshold configuration method of claim 11,
when only one pilot frequency adjacent cell meeting the set condition exists in the adjacent cells of the cell boundary, the pilot frequency measurement starting threshold is R, wherein R is Rc±Rp；RcThe RSRP of the boundary corresponding to the pilot frequency adjacent cell in the cell; rpIs an offset value.
13. The inter-frequency measurement threshold configuration method of claim 11,
when there is more than one pilot frequency adjacent cell meeting the set condition in the adjacent cells of the cell boundary, the pilot frequency measurement starting threshold is R, wherein R is Rc±Rp；RcIs a measurement value of a cell; rpAs offset values: determining R by any of the following meansc：
1) Searching the pilot frequency adjacent cell with the most corresponding cell boundary in a plurality of pilot frequency adjacent cells meeting set conditions, and recording R (reference signal received power) value of the boundary corresponding to the pilot frequency adjacent cell in the cellc；
2) Recording R the maximum RSRP value in all boundaries in the cellc；
3) Recording R the minimum RSRP value in all boundaries in the cellc；
4) Recording the average value of RSRP of all boundaries in the cell as Rc。
14. An inter-frequency measurement threshold configuration apparatus, comprising:
the measurement information acquisition unit is used for receiving measurement information reported by the user terminal UE;
a pilot frequency measurement starting threshold determining unit, configured to determine a pilot frequency measurement starting threshold according to the measurement information when a pilot frequency neighbor cell satisfying a set condition exists in the neighbor cell;
a sending unit, configured to send the determined pilot frequency measurement starting threshold to the UE through a fourth reconfiguration message;
wherein the setting condition is any one of the following conditions: a. the reference signal received power RSRP value of the pilot frequency adjacent cell is larger than the RSRP values of all the same-frequency adjacent cells; b. the RSRP value of the pilot frequency adjacent cell is larger than a preset threshold value O; and P is not less than O and not more than Q, P is the minimum value of RSRP in the same-frequency adjacent cells, and Q is the maximum value of RSRP in the same-frequency adjacent cells.
15. The inter-frequency measurement threshold configuration device of claim 14, wherein the measurement information collecting unit is further configured to:
before receiving the measurement information, issuing a first reconfiguration message to the UE, wherein the first reconfiguration message comprises:
1) adding an A3 event, and setting a threshold value of the A3 event reported by the UE; when the difference between the Reference Signal Received Power (RSRP) of the adjacent cell and the RSRP of the cell where the UE is located is higher than the threshold value, reporting an A3 event;
2) adding an A2 event, and setting a threshold value of the A2 event reported by the UE; that is, when the RSRP of the cell in which the UE is located is lower than the threshold, the a2 event is reported.
16. The inter-frequency measurement threshold configuration device of claim 15, wherein the measurement information collecting unit is further configured to:
when receiving an A2 event reported by the UE, issuing a second reconfiguration message to the UE, wherein the second reconfiguration message comprises:
1) deleting the A2 event;
2) and starting the command of pilot frequency measurement.
17. The inter-frequency measurement threshold configuration device of claim 14, wherein the measurement information collecting unit is further configured to:
before receiving the measurement information, issuing a fifth reconfiguration message to the UE, where the fifth reconfiguration message includes:
1) adding an A3 event, and setting a threshold value of the A3 event reported by the UE; when the difference between the Reference Signal Received Power (RSRP) of the adjacent cell and the RSRP of the cell where the UE is located is higher than the threshold value, reporting an A3 event;
2) and starting the command of pilot frequency measurement.
18. The inter-frequency measurement threshold configuration apparatus according to claim 16 or 17, wherein the measurement information collecting unit is further configured to:
and when the A3 event reported by the UE is received, recording the measurement information reported by the UE.
19. The inter-frequency measurement threshold configuration device of claim 18, wherein the measurement information collecting unit is further configured to:
when a preset timer exceeds or a stored measurement message exceeds a storage threshold, closing the timer and simultaneously issuing a third reconfiguration message, wherein the third reconfiguration message comprises:
1) deleting the A3 event;
2) and closing the command of pilot frequency measurement.
20. The inter-frequency measurement threshold configuration device of claim 19, wherein the measurement information collecting unit is further configured to:
when the a2 event configured in the UE is not deleted, the third reconfiguration message further includes:
the a2 event is deleted.
21. The inter-frequency measurement threshold configuration apparatus according to claim 15 or 20, wherein the measurement information comprises:
the method comprises the following steps that location information of UE, a physical cell identity identification number PCI of a cell and reference signal received power RSRP of the cell are obtained;
PCI and RSRP of each same-frequency adjacent cell;
and the PCI and the RSRP of each pilot frequency adjacent cell.
22. The inter-frequency measurement threshold configuration apparatus of claim 21, wherein the inter-frequency measurement turn-on threshold determination unit is further configured to:
rasterizing an area covered by a cell according to the position information of the UE;
and merging the measurement information reported by all the UE belonging to the same grid.
23. The inter-frequency measurement threshold configuration apparatus of claim 22, wherein the inter-frequency measurement turn-on threshold determination unit is further configured to:
when the measurement information reported by all the UE belonging to the same grid is merged, at least one of the following modes is adopted for merging:
accumulating RSRPs of cells measured by all UEs in the same grid and taking an average value;
accumulating and averaging the RSRPs of the same-frequency neighboring cells with the same PCI measured by all the UEs in the same grid;
and accumulating and averaging the RSRPs of all the pilot frequency adjacent cells with the same PCI measured in the same grid.
24. The inter-frequency measurement threshold configuration apparatus according to claim 15 or 23, wherein the inter-frequency measurement starting threshold determining unit is further configured to:
when a pilot frequency adjacent region meeting set conditions exists in an adjacent region of a cell boundary, determining a pilot frequency measurement starting threshold according to the measurement information; the boundary is a region in which the difference between the RSRP of the cell and the RSRP of the strongest neighboring cell is within a set range.
25. The inter-frequency measurement threshold configuration apparatus of claim 24, wherein the inter-frequency measurement turn-on threshold determination unit is further configured to:
when only one pilot frequency adjacent cell meeting the set condition exists in the adjacent cells of the cell boundary, the pilot frequency measurement starting threshold is R, wherein R is Rc±Rp；RcThe RSRP of the boundary corresponding to the pilot frequency adjacent cell in the cell; rpIs an offset value.
26. The inter-frequency measurement threshold configuration apparatus of claim 24, wherein the inter-frequency measurement turn-on threshold determination unit is further configured to:
when there is more than one pilot frequency adjacent cell meeting the set condition in the adjacent cells of the cell boundary, the pilot frequency measurement starting threshold is R, wherein R is Rc±Rp；RcIs a measurement value of a cell; rpAs offset values: determining R by any of the following meansc：
1) Searching the pilot frequency adjacent cell with the most corresponding cell boundary in a plurality of pilot frequency adjacent cells meeting set conditions, and recording R (reference signal received power) value of the boundary corresponding to the pilot frequency adjacent cell in the cellc；
2) Recording R the maximum RSRP value in all boundaries in the cellc；
3) Recording R the minimum RSRP value in all boundaries in the cellc；
4) Recording the average value of RSRP of all boundaries in the cell as Rc。
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