CN104159241B - One kind measurement cell determining method and device - Google Patents

Abstract

The embodiment of the present invention discloses a method and device for determining a cell measurement. The method includes: determining a candidate frequency list to be measured; the candidate frequency list includes at least one candidate frequency; calculating each The time position of the next positioning reference signal time interval PRS occasion of the candidate frequency from the current moment; select the PRS occasion closest to the current moment from the time position of the next PRS occasion of each candidate frequency, and set the distance to the current time The frequency corresponding to the latest PRS occasion is used as the frequency to be measured; and the list of cells to be measured under the frequency to be measured is determined. The embodiment of the present invention solves the technical problem in the prior art that the measurement accuracy decreases due to missing the next PRS occasion.

Description

A method and device for determining a measurement cell

technical field

The invention relates to the field of communication technology, in particular to a method and device for determining a measurement cell.

Background technique

With the development of communication technology, the OTDOA (Observed Time Difference Of Arrival) positioning method is a standardized positioning solution for an enhanced cell ID (E-Cell ID) positioning method stipulated by the 3GPP organization.

Among them, OTDOA is a positioning technology based on the time difference of signal transmission between the evolved base station (eNB, Evolved Node B) and the user equipment (UE, User Equipment). As shown in FIG. 1 , FIG. 1 is a schematic diagram of the OTDOA positioning principle in the prior art. In Figure 1, eNB1 (reference eNB) adds a positioning reference signal (PRS, Positioning ReferenceSignal) to the downlink signal to be sent, and periodically sends the PRS signal (the minimum period is 160ms, the maximum period is 1280ms), eNB1 Sending PRS signals of several consecutive downlink subframes in a period is called a PRSoccasion. The UE performs correlation calculations on multiple received downlink PRS signals, and calculates the difference between the arrival time of each neighboring eNB (such as eNB2 and eNB3) and the PRS signal of eNB1, and the UE reports the measured value of the observed arrival time difference to the network side device . The network side device determines that the UE is on the hyperbola A with eNB1 as the focus according to the measured value of the PRS signal arrival time difference between eNB2 and eNB1, as shown in Figure 1; according to the measurement of the PRS signal arrival time difference between eNB3 and eNB1 The value determines that the UE is on the hyperbola B with eNB1 as the focus, so that the intersection of A and B is the position of the UE.

In the existing technology, the OTDOA positioning method requires measuring the time difference of arrival (RSTD, Reference signal time difference) between multiple cells and the reference cell. 3GPP requires the UE to be within about 16 PRS cycles (the minimum PRS cycle is 160ms, and the maximum is 1280ms). Capable of measuring cells in up to 3 frequency layers, each frequency layer must measure at least 16 cells. Due to the limited measurement capability of the UE, it may take a long time to measure all the cells of a PRS occasion, which may exceed the PRS period, thus missing a PRS occasion. On the other hand, even if the UE measures a PRS occasion for no more than one PRS occasion, when measuring RSTD of multiple frequencies, the UE may not complete the measurement of the PRS occasion of this frequency before the start of the PRSoccasion of the next frequency; and, Since the cell may be silent (muting) within a certain PRS occasion, the measurement result cannot be obtained by scheduling the muting PRS occasion of the cell.

Therefore, how to effectively determine the measurement cell and rationally utilize UE measurement resources and PRS occasion resources to meet the measurement requirements of 3GPP is a problem to be solved for OTDOA measurement.

Contents of the invention

Embodiments of the present invention provide a method and device for determining a measurement cell to solve the technical problem in the prior art that the measurement accuracy is reduced due to missing the next PRS occasion.

In order to solve the above technical problems, the embodiment of the present invention discloses the following technical solutions:

The first aspect provides a method for determining a measurement cell, the method comprising:

determining a candidate frequency list to be measured; the candidate frequency list includes at least one candidate frequency;

Calculate the time position of each candidate frequency in the candidate frequency list in the next positioning reference signal time interval PRS occasion starting from the current moment;

Selecting the PRS occasion closest to the current moment from the time position of the next PRS occasion of each candidate frequency, and using the frequency corresponding to the PRS occasion closest to the current moment as the frequency to be tested;

Determine the cell to be measured under the frequency to be measured.

In a first possible implementation manner of the first aspect, the determining the candidate frequency list to be measured includes:

Receiving the detected time difference of arrival OTDOA measurement message sent by the network side device;

Divide the measurement cells in the OTDOA measurement message into a measurement cell list according to frequency, and record the cell number, measurement times and measurement status of each measurement cell;

When there is a non-empty same-frequency measurement cell list in the measurement cell list, using the same-frequency frequency as a candidate frequency to be measured in the candidate frequency list to be measured;

or,

When there is a non-empty inter-frequency measurement cell list in the measurement cell list, select a non-empty inter-frequency measurement cell list from the measurement cell list;

Calculate the time position of the PRS occasion of the inter-frequency;

Judging whether the time position of the PRS occasion of the inter-frequency frequency matches the measurement gap gap, and if yes, determining the inter-frequency frequency as a candidate frequency to be measured.

With reference to the first aspect or the first possible implementation of the first aspect, in the second possible implementation, after all the inter-frequency frequencies in the measurement cell list are processed, the method further includes:

If it is judged that no gap request is sent to the network side device, and there is an unmeasurable inter-frequency frequency; calculate the measurement prs offset meas prs offset of the positioning reference signal of each inter-frequency frequency; wherein, the gap request includes all inter-frequency frequencies required gap;

Send each inter-frequency and corresponding meas prs offset to the network side device.

With reference to the first aspect or the first or second possible implementation of the first aspect, in a third possible implementation, the determining the cell to be measured under the frequency to be measured includes:

Judging whether the frequency to be tested is a same-frequency frequency, if it is a same-frequency frequency, judging whether the reference cell under the frequency to be tested is in a silent state at the next PRS occasion of the frequency to be tested, and if it is in a non-quiet state, Then use the reference cell under the frequency to be measured as the cell to be measured, and select the Max Measur Cell-1 measurement results in order from the list of cells under the frequency to be measured according to the priority level of the cell as no measurement success, The cell that does not exceed the set maximum number of measurements, and that the PRS occasion is in a non-silent state at the frequency to be measured is used as the cell to be measured;

If it is a different frequency or the reference cell is in a silent state at the next PRS occasion of the frequency to be tested, select Max MeasurCell measurement results from the list of cells under the frequency to be tested in order according to the priority level of the cell. No measurement is successful, the maximum number of measurements has not been exceeded, and the cell whose PRS occasion is in a non-silent state at the frequency to be measured is used as the cell to be measured;

Wherein, Max Measur Cell is the maximum number of measurable cells.

In combination with the first aspect or the first, second, or third possible implementation of the first aspect, in a fourth possible implementation, the method further includes:

Perform measurement on the determined cell to be measured under the frequency to be measured.

In combination with the first aspect or the first or second or third or fourth possible implementation of the first aspect, in a fifth possible implementation, if it is determined that there is no waiting Measuring a cell, the method further includes:

The time position of the next PRS occasion of the frequency to be measured is updated to be the time position of the next next PRS occasion of the frequency to be measured.

In combination with the first aspect or the first or second or third or fourth or fifth possible implementation of the first aspect, in a sixth possible implementation, the updating of the The time position of the next PRS occasion of the frequency is the time position of the next PRS occasion of the frequency to be measured in the following way:

The time position of the next PRS occasion of the frequency to be measured is added to the period of the PRS occasion as the time position of the next PRS occasion of the frequency to be measured.

The second aspect provides a device for determining a measurement cell, the device comprising:

A first determining unit, configured to determine a candidate frequency list to be measured; the candidate frequency list includes at least one candidate frequency;

A first calculation unit, configured to calculate the time position of the next positioning reference signal time interval PRS occasion starting from the current moment for each candidate frequency in the candidate frequency list;

A first selection unit, configured to select the PRS occasion closest to the current moment from the time position of the next PRS occasion of each candidate frequency, and use the frequency corresponding to the PRS occasion closest to the current moment as the frequency to be tested ;

The second determining unit is configured to determine the cell to be measured under the frequency to be measured.

In a first possible implementation manner of the second aspect, the first determining unit includes: a receiving unit, a dividing unit, and a first frequency determining unit; and/or a receiving unit, a dividing unit, a second selecting unit, a second A calculation unit, a first judgment unit and a second frequency determination unit; wherein,

The receiving unit is configured to receive the detected time difference of arrival OTDOA measurement message sent by the network side device;

The division unit is used to divide the measurement cells in the OTDOA measurement message into a measurement cell list according to frequency, and record the cell number, measurement times and measurement status of each measurement cell;

The first frequency determining unit is configured to use the same-frequency frequency as one of the candidate frequency lists to be measured when there is a non-empty same-frequency measurement cell list in the measurement cell list divided by the division unit the candidate frequency of

The second selection unit is configured to select a non-empty inter-frequency measurement cell list from the measurement cell list when there is a non-empty inter-frequency measurement cell list in the measurement cell list divided by the division unit;

The second calculation unit is configured to calculate the time position of the PRS occasion of the inter-frequency frequency;

The first judging unit is configured to judge whether the time position of the PRS occasion of the different frequency matches the measurement gap gap; and send the matching judging result to the second frequency determining unit;

The second frequency determining unit is configured to determine the inter-frequency as a candidate frequency to be measured when receiving the matching judgment result sent by the first judging unit.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner, the device further includes:

The second judging unit is used for judging whether a gap request of a different frequency is sent to the network side device after the different frequencies in the list of cells to be measured are all processed, whether there is an unmeasurable different frequency, and will not be sent The gap request, and the judgment result of the unmeasurable inter-frequency frequency is sent to the third calculation unit; wherein, the gap request includes the gap required by all inter-frequency frequencies;

A third calculation unit, configured to calculate the measurement prs offset meas prs offset of each inter-frequency positioning reference signal when the determination result is sent by the second determination unit;

The sending unit is configured to send each inter-frequency and corresponding meas prs offset to the network side device.

With reference to the second aspect or the first or second possible implementation manner of the second aspect, in a third possible implementation manner, the second determination unit includes:

A third judging unit, configured to judge whether the frequency to be tested is a same-frequency frequency;

The fourth judging unit is configured to continue to judge whether the reference cell under the frequency to be tested is in a silent state at the next PRS occasion of the frequency to be tested when the third judging unit judges that it is the same frequency;

The first cell determining unit is configured to use the reference cell under the frequency to be measured as the cell to be measured when the fourth judging unit judges that the reference cell is in a non-silent state, and select the reference cell under the frequency to be measured as the cell to be measured, and obtain the reference cell under the frequency to be measured In the cell list, select the Max Measur Cell-1 measurement results in order according to the priority level of the cell. The measurement results are not successful, the maximum number of measurements has not been exceeded, and the PRS occasion is in a non-quiet state under the frequency to be measured. The cell is used as the cell to be measured;

The second cell determining unit is configured to determine that the third judging unit is a different frequency, or when the fourth judging unit judges that the reference cell is in a silent state at the next PRS occasion of the frequency to be tested, From the list of cells under the frequency to be tested, select the Max Measur Cell measurement results in order according to the priority level of the cell. The measurement results are not successful, the maximum number of measurements has not exceeded, and the next PRSoccasion at the frequency to be tested A cell in a non-quiet state is used as a cell to be measured;

Wherein, Max Measur Cell is the maximum number of measurable cells.

With reference to the second aspect or the first or second or third possible implementation manner of the second aspect, in a fourth possible implementation manner, the device further includes:

A measuring unit, configured to measure the cell to be measured determined by the second determining unit.

In combination with the second aspect or the first or second or third or fourth possible implementation of the second aspect, in a fifth possible implementation, the device further includes:

An updating unit, configured to update the time position of the next PRS occasion of the frequency to be tested to be the next PRSoccasion of the frequency to be tested when the second determination unit determines that there is no cell to be measured under the frequency to be tested time position.

With reference to the second aspect or the first or second or third or fourth or fifth possible implementation of the second aspect, in a sixth possible implementation, the updating unit updates the The time position of the next PR Soccasion of the frequency to be measured is the time position of the next PRS occasion of the frequency to be measured in the following way:

Adding the period of the PRS occasion to the time position of the next PRS occasion of the frequency to be measured is used as the time position of the next PRS occasion of the frequency to be measured.

It can be seen from the above technical solution that in the embodiment of the present invention, first determine the list of candidate frequencies to be measured, and then select the time position of the next PRS occasion of the candidate frequencies in the list of candidate frequencies corresponding to the PRS occasion closest to the current moment. The frequency is used as the frequency to be measured, and the cell to be measured under the frequency to be measured is determined, that is, the frequency and cell for the next measurement are reasonably selected in the embodiment of the present invention, thereby effectively avoiding the measurement caused by missing the next PRSoccasion The technical problem of accuracy decline; it also effectively avoids the waste of measurement resources, time and power caused by multiple invalid repeated measurements of the same cell, thereby improving the efficiency of measurement.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the embodiments. Obviously, the accompanying drawings in the following description are only some of the present invention. Embodiments, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

FIG. 1 is a schematic diagram of the OTDOA positioning principle in the prior art;

FIG. 2 is a flow chart of a method for determining a measurement cell provided by an embodiment of the present invention;

FIG. 3 is a flow chart of another method for determining a measurement cell provided by an embodiment of the present invention;

Fig. 4 is the flowchart of determining the list of candidate frequencies to be measured in Fig. 3;

Fig. 5 is the flowchart of determining the sub-district to be measured under the frequency to be measured in Fig. 3;

6 is a schematic diagram of a user equipment receiving a pattern sent by the network side equipment in Prs occasion in the embodiment of the present invention;

FIG. 7 is a schematic diagram of the user equipment receiving another pattern sent by the network side equipment in Prs occasion in the embodiment of the present invention;

FIG. 8 is a schematic diagram of a UE sending Prs pattern provided in an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of an apparatus for determining a measurement cell provided by an embodiment of the present invention;

FIG. 10 is another structural schematic diagram of an apparatus for determining a measurement cell provided by an embodiment of the present invention;

Fig. 11 is a schematic structural diagram of a user equipment provided by an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

In this application example, before performing each OTDOA measurement, the UE passes through the measurement status of each cell, the number of measurements of the cell, the maximum number of measurements of each cell, the measurement priority of the cell, and the next positioning reference signal time interval of the cell. (PRS occasion) Whether to mute (muting) to determine the frequency and measured cell in the next PRS occasion measurement.

Before introducing this embodiment of the present invention, do the following parameter setting earlier:

1. Assign a measurement state to each cell, and the measurement state may include the following three types but is not limited thereto:

Failed: indicates that the cell has not been measured or has not been successfully measured;

Bad: indicates that the cell has been measured, but the measurement result is not a good cell;

Success: indicates that the cell has been successfully measured;

Usually, the initial measurement status of each cell is Failed.

2. Assign a cell measurement number (Measure Num) to each cell to record the number of times the cell is repeatedly performed TOA measurement. The initial measurement number (Measure Num) is 0, that is, Measure Num=0.

3. Set the maximum number of measurements Max Num Repeat Measur for other cells except the RSTD reference cell. The maximum number of measurements is set according to the UE RSTD measurement capability. The UE RSTD measurement capability is strong, and the value of Max Num Repeat Measur is large; UE RSTD measurement The ability is strong, and the value of Max Num Repeat Measur is small. Usually, the maximum number of measurement times can be 4, of course, it is not limited thereto, and it can also be adaptively modified according to the actual situation, such as being modified to 5 or 7 or 10 and so on.

4. Classify the cells to be measured according to the frequency; set the measurement priority of each cell, the setting of the measurement priority is set according to the order of the measurement cells issued by the high-level, the priority of the former cell is higher, and the priority of the latter cell low level.

Please refer to FIG. 2. FIG. 2 is a flowchart of a method for determining a measurement cell provided by an embodiment of the present invention; the method includes:

Step 201: Determine a candidate frequency list to be measured; the candidate frequency list includes at least one candidate frequency;

In this step, the user equipment determines the candidate frequency list to be measured according to the measurement request sent by the network side equipment. A process for determining a list of candidate frequencies to measure includes:

First, the user equipment UE receives the OTDOA measurement message sent by the network side device, and the OTDOA measurement message may include: the measurement frequency to be measured, the measurement cell id under each measurement frequency, and the positioning reference signal time interval of the measurement cell ( PRS occasion) time information (or time location information), measurement cell muting information, etc.

Then, the UE divides the measurement cells in the OTDOA measurement message into a measurement cell list according to frequency, and records the cell number, measurement times and measurement status of each measurement cell;

Then, the UE judges whether there is a non-empty intra-frequency measurement cell list in the measurement cell list (the measurement cell list may include one or more measurement cells, or may include zero measurement cells), and if so, it will The frequency is used as a candidate frequency to be measured in the list of candidate frequencies to be measured; if it does not exist, end this process;

Then, the UE continues to judge whether there is a non-empty inter-frequency measurement cell list in the measurement cell list, and if so, selects a non-empty inter-frequency frequency from the measurement cell list; calculates the PRSoccasion of the inter-frequency frequency Afterwards, judge whether the time position of the PRS occasion of the different-frequency frequency matches the measurement gap gap, if yes, determine that the different-frequency frequency is a candidate frequency to be measured; otherwise, determine that the different-frequency frequency is Can not measure the different frequency;

Among them, judging whether the time position of the PRS occasion matches the measurement gap gap can be determined by the coincidence of the time position of the PRSoccasion and the gap. Usually, both the PRS occasion and the gap include six subframes. For example, for a larger bandwidth In some cases, at least one subframe of the two can overlap in time. In the case of relatively small bandwidth, it may be necessary for several subframes to overlap in time. Depending on the situation, it can be two subframes in time. It may also be that 3 or 4 subframes overlap in time, etc.

Afterwards, if there are other non-empty inter-frequency in the measurement cell list, re-execute the step of selecting an inter-frequency inter-frequency of an inter-frequency cell to be measured, that is, select the next inter-frequency from the measurement cell list The inter-frequency frequency of the cell to be measured, calculating the time position of the PRS occasion of the inter-frequency frequency, judging whether the time position of the PRS occasion matches the measurement gap gap, and if so, determining that the inter-frequency frequency is a candidate to be measured frequency; otherwise, determine that the different frequency is an unmeasurable different frequency. Until the frequency calculation and processing of the non-empty inter-frequency cells to be measured in the cell to be measured list is completed.

Optionally, after all the inter-frequency frequencies in the measurement cell list are processed, the UE judges whether a gap request for an inter-frequency frequency is sent to the network side device, and whether there is no unmeasurable inter-frequency frequency, wherein the gap request Include the gaps required by all inter-frequency frequencies; if none, calculate the measurement prs offset measprs offset of the positioning reference signal for each inter-frequency frequency; send each inter-frequency frequency and the corresponding meas prs offset to the network side device.

That is to say, the UE can first determine whether a gap request is sent to the network side device, and if the gap request is sent, this process ends; if the gap request is not sent, it determines whether there is an unmeasurable inter-frequency; If yes, calculate the measurement prs offset meas prs offset of the positioning reference signal of each different frequency frequency; send each different frequency frequency and the corresponding meas prs offset to the network side device; otherwise, end this process.

Of course, the UE can also first determine whether there is an unmeasurable frequency difference, and if there is no unmeasurable frequency difference, then end this process; if there is a measurable frequency difference, then determine whether a gap request has been sent to the network side device; if not, then Calculate the measurement prs offset meas prs offset of the positioning reference signal of each different frequency; send each different frequency and the corresponding meas prs offset to the network side device; otherwise, end this process.

Wherein, the process of determining the list of candidate frequencies to be measured is specifically shown in FIG. 4 , and will not be described in detail here.

Step 202: Calculate the time position of each candidate frequency in the candidate frequency list in the next positioning reference signal time interval PRS occasion starting from the current moment;

In this embodiment, the time position of the first same-frequency PRS occasion is calculated, and then the time position of the next PRS occasion of each candidate frequency from the current moment is calculated according to the time position of the first same-frequency PRS occasion.

Step 203: Select the PRS occasion closest to the current moment from the time position of the next PRS occasion of each candidate frequency, and use the frequency corresponding to the PRS occasion closest to the current moment as the frequency to be tested;

That is to say, the time positions of the next PRS occasion of several candidate frequencies are compared, and the frequency corresponding to the PRS occasion closest to the current moment is selected as the frequency to be tested.

Step 204: Determine the cell to be measured under the frequency to be measured.

Wherein, it is first judged whether there is a cell to be measured under the frequency to be measured, that is to say, the frequency to be tested may include the cell to be measured that needs to be measured this time, or may include zero cells to be measured, that is, there is no cell to be measured. of the area to be measured.

Wherein, if the frequency to be measured includes the cell to be measured that needs to be measured this time, a process of determining the cell to be measured under the frequency to be measured is:

First, judge whether the frequency to be tested is the same frequency, if it is the same frequency, then judge whether the reference cell under the frequency to be tested is in a silent state at the next PRS occasion of the frequency to be tested, if it is not In the silent state, the reference cell under the frequency to be tested is used as the cell to be measured, and the Max Measur Cell-1 measurement results are selected in order from the list of cells under the frequency to be measured according to the priority level of the cell. The cell whose measurement is successful, does not exceed the set maximum number of measurements, and the PRS occasion is in a non-silent state at the frequency to be measured is used as the cell to be measured;

For example, if the UE can measure up to 8 cells each time according to its own performance, if the reference cell under the same frequency to be tested is used as the cell to be measured, it also needs to be measured from the list of cells under the same frequency to be tested. 7 cells are selected as the cells to be measured, and the selection method can be selected according to the priority of each cell from high to low. A cell that is in a non-silent state for a PRS occasion is used as a cell to be measured.

If the frequency to be measured is a different frequency or the reference cell is in a silent state, select the Max Measur Cell measurement results in order from the list of cells under the frequency to be measured according to the priority level of the cell. The set maximum number of measurements, and the cell whose PRS occasion is in a non-silent state at the frequency to be measured is used as the cell to be measured;

Wherein, Max Measur Cell is the maximum number of measurable cells.

Wherein, the flow chart of determining the list of cells to be measured under the frequency to be measured is shown in FIG. 5 , which will not be repeated here.

In the embodiment of the present invention, first determine the candidate frequency list to be measured, and then select the frequency corresponding to the PRS occasion closest to the current moment in the time position of the next PRS occasion of the candidate frequency in the candidate frequency list as the frequency to be measured, and determine The cell to be measured under the frequency to be measured, that is, the frequency and the cell to be measured next time are reasonably selected in the embodiment of the present invention, thereby effectively avoiding the technical problem that the measurement accuracy drops due to missing the next PRS occasion; It effectively avoids the waste of measurement resources, time and power caused by multiple invalid repeated measurements of the same cell, thereby improving the efficiency of measurement.

Please also refer to FIG. 3. FIG. 3 is a flowchart of another method for determining a measurement cell provided by an embodiment of the present invention. The method includes:

Step 300: Determine a list of candidate frequencies to be measured;

In this step, the user equipment determines the candidate frequency list to be measured according to the OTDOA measurement message sent by the network side equipment. The process of determining the list of candidate frequencies to be measured is shown in FIG. 4 in detail, and will not be repeated here.

Step 301: UE judges whether the list of candidate frequencies to be measured is empty (that is, whether it includes candidate frequencies to be measured), if not, execute step 303; if yes, execute step 302: end the process;

Step 303: UE calculates the time position of each candidate frequency in the candidate frequency list to be measured in the next positioning reference signal time interval PRS occasion from the current moment;

The calculation process is detailed above and will not be repeated here.

Step 304: The UE selects the frequency corresponding to the PRS occasion closest to the current moment in the time position of the next PRS occasion of the candidate frequency as the frequency to be tested;

Step 305: UE determines whether there is a cell to be measured under the frequency to be measured; if yes, execute step 306; otherwise, execute step 308;

Usually, there are multiple cells under one frequency to be tested. The UE needs to determine which of the multiple cells under it is the cell to be measured this time, that is, the cell to be measured. Which cells do not need this measurement. The determination method can be determined according to conditions such as whether the number of measurements of the cell exceeds the set maximum number of measurements, whether the measurement status is success or failure, or the measurement result is not good.

Among the determined cells to be measured, there may be one or more cells that need to be measured under the frequency to be measured. Of course, there may be no cells to be measured under the frequency to be measured, that is, there are no cells to be measured.

The flow chart of the UE determining the cell to be measured under the frequency to be measured is shown in FIG. 5 , which will not be repeated here.

Step 306: Determine the cell to be measured under the frequency to be measured;

The determined process is described above in detail.

Step 307: Perform measurement on the determined measurement cell;

After the measurement is completed, this process ends.

The measurement process of the cell is a well-known technology, and will not be repeated here.

Step 308: update the time position of the next PRS occasion of the frequency to be tested to the time position of the next next PRS occasion of the frequency to be tested; then return to step 304 and continue to select the frequency to be tested.

In the embodiment of the present invention, by further judging whether there is a cell to be measured in the list of cells to be measured, when there is a cell to be measured in the list of cells to be measured, the cell to be measured is directly measured, and when there is no cell to be measured, update The time position of the next PRS occasion of the cell to be measured is the time position of the next PRS occasion of the frequency to be measured, thereby improving the efficiency of measuring the cell.

Also refer to Fig. 4, Fig. 4 is the flowchart of determining the list of candidate frequencies to be measured in Fig. 3, in this embodiment, taking the first measurement as an example, including:

Step 401: UE receives the OTDOA measurement message sent by the network side device;

That is to say, the UE receives the pattern sent by the network-side device at Prs occasion, and the pattern is shown in FIG. 6 . FIG. 6 is a schematic diagram of a pattern of Prs occasion sent by the network-side device to the user equipment in an embodiment of the present invention;

As shown in FIG. 6, time 0 is the time when candidate frequencies start to be selected.

Assuming that f1 is the same frequency, the cells to be measured on frequency f1 take cells C01 and C02 as examples;

Assuming that f2 is a different frequency, the cells to be measured on frequency f2 take cells C11 and C12 as examples;

Step 402: The UE divides the measurement cells in the OTDOA measurement message into a measurement cell list according to frequency, and records the cell number, measurement times and measurement status of each measurement cell;

Wherein, the list of cells to be measured is as shown in Table 1, including a list of same-frequency measurement cells and a list of different-frequency measurement cells, wherein the list of same-frequency measurement cells and the list of different-frequency measurement cells include frequency, cell number, number of measurements and measurement status.

Table 1

Step 403: The UE judges whether the same-frequency measurement cell list in the cell-to-be-measured list is empty, and if yes, executes step 404; ends this procedure; otherwise, executes step 405;

In this embodiment, the UE finds that there is a measurement cell that needs to be measured in the same-frequency measurement cell list, that is, the same-frequency measurement cell list is not empty; otherwise, that is, there is no measurement cell that needs to be measured in the same-frequency measurement cell list, then The frequency measurement cell list is empty.

In this embodiment, it is found that there are two cells to be tested on the same frequency (f1). From the measurement times in Table 1, the measurement of the two cells is the first measurement.

Step 405: The UE selects the same frequency f1 as a candidate frequency to be measured; that is, selects it as one of the candidate frequencies to be measured;

Step 406: The UE judges whether there is a non-empty inter-frequency measurement cell list in the measurement cell list, if yes, execute step 407; otherwise, execute step 408: end this process;

In this embodiment, the UE finds that there is a non-empty inter-frequency f2, and there are two cells to be measured under the inter-frequency f2.

Step 407: UE selects a non-empty inter-frequency frequency from the measurement cell list;

That is, select the different frequency f2.

Step 409: The UE calculates the time position of the PRS occasion of different frequencies;

In this embodiment, as shown in FIG. 6 , the UE calculates the time positions of the inter-frequency PRS occasion2 of f2 as 15 to 21. In FIG. 6 , the solid-line box corresponding to label 1 indicates Prs occasion1; the solid-line box corresponding to label 2 indicates Prsoccasion2; the dotted-line box corresponds to the measurement gap gap.

Step 410: The UE judges whether the time position of the PRS occasion matches the measurement gap gap; if yes, execute step 411; otherwise, execute step 412;

In this step, if the bandwidth is relatively large, if the UE finds that the time position from the beginning to the end of the gap coincides with the time position of the PRS occasion, the inter-frequency frequency can be used as the candidate frequency to be measured; Otherwise, it is determined that the inter-frequency is an undetectable inter-frequency.

Of course, in the case of a relatively small bandwidth, it may be necessary for at least several subframes to coincide in time to determine the inter-frequency frequency as the candidate frequency to be measured. The specific subframe needs to be determined according to the situation. In this embodiment, the position of the gap is from 8 to 14. Since the time position of the PRS occasion2 does not coincide with the gap, the time position of the PRS occasion2 does not match the gap, and step 412 is performed.

Step 411: Determine that the different frequency is a candidate frequency to be measured; perform step 413;

Step 412: Determine that the different frequency is an unmeasurable different frequency; perform step 413;

That is, it is determined that f2 is an unmeasurable shift frequency. In this embodiment, f2 is determined as an unmeasurable split frequency.

Step 413: UE judges whether all inter-frequency in the measurement cell list has been processed, if yes, execute step 414; otherwise, return to step 407;

In this embodiment, since there is only one different frequency f2 in the list of cells to be measured, all processing is completed. Of course, in other embodiments, if there are multiple different frequencies, it is necessary to continue to perform the above steps 407 to 414 until The described split is processed.

Step 414: UE judges whether a gap request has been sent to the network side device, and judges whether there is no unmeasurable frequency shift. If yes, execute step 415: end this process; if no, execute step 416;

Wherein, in this embodiment, the UE may first determine whether a gap request is sent to the network side device, and if the gap request is sent, the process ends; if the gap request is not sent, then it is judged whether there is an unmeasurable Different frequency; if yes, execute step 416; otherwise, end this process.

Of course, the UE can also first determine whether there is an unmeasurable frequency difference, and if there is no unmeasurable frequency difference, then end this process; if there is a measurable frequency difference, then determine whether a gap request has been sent to the network side device; if not, then Execute step 416; otherwise, end this process.

In this step, the gap request includes all the gaps required by the different frequencies, that is, the different frequencies that are candidate frequencies and the unmeasurable different frequencies. In this embodiment, since f2 is an unmeasurable frequency, step 416 is executed.

Step 416: UE calculates the measured prs offset (meas prs offset) of each inter-frequency positioning reference signal;

In this embodiment, since there is only one different frequency f2, only the meas prs offset of the different frequency f2 is calculated. Of course, if there are multiple different frequencies, the meas prs offset of each different frequency needs to be calculated.

Step 417: The UE reports each inter-frequency and the corresponding measured prs offset (meas prsoffset) to the network side device.

In this embodiment, f2 and f2's meas prs offset are reported.

In the above-mentioned embodiment described in FIG. 4 , each cell takes the first measurement as an example. The following example illustrates that there is a non-first measurement in each cell. Assume that another pattern of Prs occasion sent by the UE to the network side device is shown in FIG. 7 7 is a schematic diagram of another pattern sent by the user equipment receiving the Prs occasion sent by the network side equipment in the embodiment of the present invention. In FIG. 7 , the solid-line box corresponding to label 1 indicates Prs occasion1; the solid-line box corresponding to label 2 indicates Prsoccasion2; the dotted-line box corresponds to the measurement gap gap.

It can be seen from FIG. 7 that time 10 is the time when candidate frequencies start to be selected.

Assuming that f1 is the same frequency, the cells to be measured on frequency f1 take cells C00 and C01 as examples;

Assuming that f2 is a different frequency, the cells to be measured on frequency f2 take cells C10 and C11 as examples;

Afterwards, divide the measurement cell in the OTDOA measurement message into a measurement cell list according to frequency, and record the cell number, measurement times and measurement status of each measurement cell, wherein the measurement cell list is as shown in Table 2, including Same frequency measurement cell list and different frequency measurement cell list;

Table 2

Then, the UE judges whether there is a non-empty co-frequency measurement cell list in the measurement cell list;

In this embodiment, it is found that the measurement of the intra-frequency cell C00 is successful, and no further measurement is required, and the measurement times of C01 reach the maximum measurement times, and no measurement is required. Therefore, the intra-frequency measurement cell list is empty.

Then, it is judged whether there is a non-empty inter-frequency measurement cell list in the measurement cell list, and it is found that there are two sub-cells to be measured in the inter-frequency f2, that is, it is not empty.

Then, select a non-empty inter-frequency frequency from the list of measurement cells. In this embodiment, an inter-frequency frequency f2 is selected. The process is the same as the process of the above-mentioned Figure 4. See the above for details, and will not repeat them here. .

Afterwards, it is determined that the different frequency f2 is the candidate frequency, and step 413 is executed, that is, it is judged whether all the different frequencies have been processed, and if it is processed, the subsequent steps are the same as the above-mentioned steps, see the above for details, here No longer.

In the embodiment of the present invention, since the maximum number of measurements of each cell is limited, and the measurement is not repeated after successful cell measurement, meaningless repeated measurement of a cell can be effectively avoided, thereby effectively avoiding waste of time and power. Since the number of cells measured each time is limited according to the measurement capability of the UE, it is effective to avoid missing the PRS occasion.

Please also refer to FIG. 5, which is a flow chart of determining the cell under the frequency to be measured as the cell to be measured provided in FIG. 3. In this embodiment, the UE receives a pattern of Prs sent by the network side device such as As shown in FIG. 8 , FIG. 8 is a schematic diagram of a UE receiving a pattern of Prs sent by a network side device provided in an embodiment of the present invention. It can be seen from Figure 8 that: in prsoccasion1, cells C00 and C01 both send prs; in prs occasion2, cells C10 and C11 both send prs; in prsoccasion3, only cell C00 sends prs; in prs occasion4, only cell C10 sends prs ;In prsoccasion5, only cell C01 sends prs;

In this embodiment, the list of candidate frequencies to be measured is shown in Table 3, and the cell C00 is the RSTD reference cell.

table 3

In this embodiment, on the basis of the foregoing embodiments, it is determined that f1 is the same frequency; its implementation process includes:

: Step 501: UE judges whether the frequency to be tested is the same frequency, if yes, execute step 502; otherwise, execute step 505;

In this embodiment, the frequency f1 to be tested is the same frequency. And it is assumed that the cell C00 under the frequency f1 to be tested is the RSTD reference cell.

Step 502: UE judges whether the reference cell (ie, cell C00) under the frequency to be tested is in a muting state, if not, execute step 503; if yes, execute step 505;

In this embodiment, it is assumed that the cell C00 of the frequency f1 to be tested sends prs in prsoccasion1, so the state of the cell C00 is not muting; of course, if no prs is sent in prsoccasion1, the state of the cell C00 is silent .

Step 503: taking the reference cell (that is, cell C00) under the frequency to be measured as the measurement cell; and

Step 504: From the list of cells under the frequency to be tested, select Max Measur Cell-1 measurement results in order according to the priority level of the cells, which are not measured successfully, and do not exceed the set maximum number of measurements, and in the pending frequency The next time the frequency is measured, the cell whose PRS occasion is in a non-quiet state is used as the cell to be measured; where MaxMeasur Cell is the maximum number of measurable cells;

Step 505: From the list of cells under the frequency to be tested, select the Max Measur Cell cells according to the priority level of the cells. The cell whose PRS occasion is in the non-quiet state at the next frequency is used as the cell to be measured.

In this embodiment, cells C00 and C01 are selected as cells to be measured.

The present invention provides a cell selection method for OTDOA positioning measurement, which comprehensively considers OTDOA measurement requirements, OTDOA measurement PRS configuration, UE's OTDOA measurement capability, signal quality of the cell and the number of measurements of the cell, and reasonably selects the frequency and frequency of the next measurement. Cells, to maximize the use of the UE's measurement capabilities and PRS occasioin, to meet the required OTDOA measurement of each cell in the frequency layer.

Based on the implementation process of the above method, the embodiment of the present invention also provides a device for determining a measurement cell, its structural diagram is shown in Figure 9, the device includes: a first determination unit 91, a first calculation unit 92, a first selection unit A unit 93 and a second determination unit 94, wherein the first determination unit 91 is configured to determine a candidate frequency list to be measured, and the candidate frequency list includes at least one candidate frequency; the first calculation unit 92 uses To calculate the time position of the next positioning reference signal time interval PRS occasion of each candidate frequency in the candidate frequency list starting from the current moment; the first selection unit 93 is used to start from the next time position of each candidate frequency Selecting the PRS occasion closest to the current moment in the time position of the PRS occasion, and using the frequency corresponding to the PRS occasion closest to the current moment as the frequency to be measured; the second determining unit 94 is configured to determine the frequency to be measured Under the cell to be measured.

In another embodiment, on the basis of the above-mentioned embodiment in FIG. 9 , the first determining unit 91 includes: a receiving unit 911, a dividing unit 912, and a first frequency determining unit 913; Unit 911, dividing unit 912, second selecting unit 914, second computing unit 915, first judging unit 916 and second frequency determining unit 917; its structural diagram is shown in Figure 10, which is provided by an embodiment of the present invention Another structural schematic diagram of a device for determining a measurement cell; in FIG. 10, two situations are included as an example, wherein,

The receiving unit 911 is configured to receive the OTDOA measurement message sent by the network side equipment; the dividing unit 912 is configured to divide the measurement cells in the OTDOA measurement message into a measurement cell list according to frequency, and record each measurement cell The cell number, the number of times of measurement, and the measurement status; the first frequency determination unit 913 is configured to use the same-frequency frequency as Candidate frequencies to be measured; the second selection unit 914 is configured to select a non-empty inter-frequency measurement cell list from the measurement cell list when there is a non-empty inter-frequency measurement cell list in the measurement cell list divided by the division unit The second calculation unit 915 is used to calculate the time position of the PRS occasion of the different frequency frequency; the first judging unit 916 is used to judge the time position and the measurement gap gap of the PRS occasion of the different frequency frequency Whether it matches; the matching judgment result is sent to the second frequency determination unit 917, and the second frequency determination unit 917 is configured to determine the difference when receiving the matching judgment result sent by the first judgment unit 916. Frequency is the candidate frequency to be measured.

In another embodiment, this embodiment is based on the above embodiment, after all the different frequencies in the cell list to be measured are processed, the device may further include: a second judging unit, a third calculating unit and sending unit,

Wherein, the second judging unit is connected to the second frequency determining unit, and is used for judging whether a gap request of a different frequency is sent to the network side device after all the different frequencies in the cell list to be measured are processed, Whether there is an unmeasurable inter-frequency frequency, and the judgment result that the gap request is not sent and there is an unmeasurable inter-frequency frequency is sent to the third calculation unit; wherein, the gap request includes the gap required by all inter-frequency frequencies; The third calculation unit is used to calculate the measurement prs offset meas prs offset of the positioning reference signal of each different frequency frequency when the gap request sent by the second judgment unit is not sent and there is an unmeasurable different frequency frequency; The sending unit is configured to send each inter-frequency and corresponding meas prs offset to the network side device.

Wherein, wherein, the second judging unit may first judge whether a gap request is sent to the network side device, and if not, then judge whether there is an unmeasurable frequency; it may also first judge whether there is an unmeasurable frequency, and if so, whether to The network-side device sends a gap request.

In another embodiment, based on the above embodiment, the second determining unit includes: a third judging unit, a fourth judging unit, a first cell determining unit, and a second cell determining unit. in,

The third judging unit is used to judge whether the frequency to be tested is the same frequency; the fourth judging unit is used to continue judging the frequency to be tested when the third judging unit judges that the frequency is the same frequency. Whether the reference cell under the frequency is in a silent state at the next PRS occasion of the frequency to be tested; the first cell determination unit is used to determine the reference cell in a non-quiet state when the fourth judging unit The reference cell under the frequency to be measured is used as the cell to be measured, and the MaxMeasur Cell-1 measurement results are selected from the list of cells under the frequency to be measured in order according to the priority level of the cell. The maximum number of measurements, and the cell whose PRS occasion is in a non-quiet state at the frequency to be measured is used as the cell to be measured; the second cell determination unit is used to judge that it is an inter-frequency frequency by the third judging unit , or when the fourth judging unit judges that the reference cell is in a silent state at the next PRS occasion of the frequency to be tested, select Max from the list of cells under the frequency to be tested according to the cell priority The Measur Cell measurement results are no measurement success, the maximum number of measurements that have not been exceeded, and the cell that is in a non-silent state at the next PRS occasion of the frequency to be measured is used as the cell to be measured; where Max Measur Cell is the cell that can be measured the maximum number of .

Optionally, in another embodiment, the apparatus may further include: a measuring unit; the measuring unit is configured to measure the cell to be measured determined by the second determining unit.

Optionally, in another embodiment, the device may further include: an updating unit, configured to update the The time position of the next PRS occasion of the frequency to be measured is the next next PRS occasion of the frequency to be measured; the first selection unit is used to: select the time position of the next PRS occasion of the frequency to be measured The frequency corresponding to the PR Soccasion closest to the current moment is used as the frequency to be tested.

Wherein, the updating unit updates the time position of the next PRS occasion of the frequency to be measured as the time position of the next PRS occasion of the frequency to be measured in the following manner: the time position of the next PRS occasion of the frequency to be measured is The position plus the period of the PRS occasion is used as the time position of the next PRSoccasion of the frequency to be measured.

In this embodiment, the device for determining the measuring cell may be integrated in the user equipment, or deployed independently, which is not limited in this embodiment.

An embodiment of the present invention also provides a user equipment, which includes: a schematic structural diagram thereof is shown in FIG. 11 , and the user equipment 1 includes: a transceiver 10 and a processor 11 .

Wherein, the transceiver 10 is configured to receive a detected time difference of arrival OTDOA measurement message sent by the network side device; the processor 11 is configured to determine a list of candidate frequencies to be measured according to the OTDOA measurement message received by the transceiver; The candidate frequency list includes at least one candidate frequency; calculate the time position of the next positioning reference signal time interval PRS occasion starting from the current moment for each candidate frequency in the candidate frequency list; Select the PRS occasion closest to the current moment from the time position of a PRS occasion, and use the frequency corresponding to the PRS occasion closest to the current moment as the frequency to be measured; determine the cell to be measured under the frequency to be measured.

Optionally, the process for the processor to determine the list of candidate frequencies to be measured includes: the processor divides the measurement cells in the OTDOA measurement message into measurement cell lists according to frequency, and records the cell number, measurement Number of times and measurement status; if there is a non-empty same-frequency measurement cell list in the measurement cell list, the same-frequency frequency is used as a candidate frequency to be measured in the candidate frequency list to be measured; if the measurement cell list is There is a non-empty inter-frequency measurement cell list, then select a non-empty inter-frequency frequency from the measurement cell list; calculate the time position of the PRS occasion of the inter-frequency frequency; determine the PRS occasion of the inter-frequency frequency Whether the time position matches the measurement gap gap, if so, determine that the different frequency is a candidate frequency to be measured; otherwise, determine that the different frequency is an unmeasurable different frequency; continue to select the next measurement cell list non- Empty inter-frequency frequencies until all non-empty inter-frequency frequencies in the list of cells to be measured are all processed.

Optionally, after all the different frequencies in the list of cells to be measured are processed, the processor is further configured to determine whether a gap request for a different frequency is sent to the network side device, or whether there is no unmeasurable different frequency The request of the gap request includes the gap required by all different frequency frequencies; if not, then calculate the measurement prs offset meas prs offset of the positioning reference signal of each different frequency frequency;

The transceiver is further configured to send each inter-frequency and corresponding meas prs offset to the network side device.

Optionally, the processor determining the cell to be measured under the frequency to be tested includes: judging whether the frequency to be tested is a frequency of the same frequency, and if it is a frequency of the same frequency, judging the reference cell under the frequency to be tested Whether the PRS occasion under the frequency to be tested is in a silent state, if it is in a non-quiet state, use the reference cell under the frequency to be measured as the cell to be measured, and select from the list of cells under the frequency to be measured according to The priority level of the cell is selected in order of Max Measur Cell-1 measurement results, the measurement results are not successful, the maximum number of measurements has not been exceeded, and the cell whose PRS occasion is in a non-quiet state at the frequency to be measured is used as the cell to be measured District;

If it is a different frequency or the reference cell is in a silent state at the next PRS occasion of the frequency to be tested, select Max MeasurCell measurement results from the list of cells under the frequency to be tested in order according to the priority level of the cell. The cell that has no successful measurement, does not exceed the set maximum number of measurements, and is in a non-quiet state in the next PRSoccasion is used as the cell to be measured; where Max Measur Cell is the maximum number of measurable cells.

Optionally, the processor is further configured to determine whether there is a cell to be measured under the frequency to be measured; if it exists, determine the cell to be measured under the frequency to be measured, and perform the determined cell to be measured Measure; otherwise, update the time position of the next PRS occasion of the frequency to be measured to be the time position of the next PRS occasion of the frequency to be measured;

Wherein, the method for the processor to update the time position of the next PRS occasion of the frequency to be tested to be the time position of the next PRS occasion of the frequency to be tested is: set the time position of the next PRS occasion of the frequency to be tested to The position plus the period of the PRS occasion is used as the time position of the next PRSoccasion of the frequency to be measured.

In the embodiment of the present invention, the UE can be any of the following, it can be static or mobile, and the static UE can specifically include a terminal (terminal), a mobile station (mobile station), and a subscriber unit (subscriber unit) or a station (station), etc., the mobile UE can specifically include a cellular phone (cellular phone), a personal digital assistant (PDA, personal digital assistant), a wireless modem (modem), a wireless communication device, a handheld device (handheld), a laptop A computer (laptop computer), a cordless phone (cordless phone) or a wireless local loop (WLL, wireless local loop) station, etc., and the aforementioned UEs may be distributed throughout the wireless network.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or order between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is a better implementation Way. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art can be embodied in the form of software products, and the computer software products can be stored in storage media, such as ROM/RAM, disk , CD, etc., including several instructions to make a computer device (which may be a personal computer, server, or network device, etc.) execute the methods described in various embodiments or some parts of the embodiments of the present invention.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be It is regarded as the protection scope of the present invention.

Claims (14)

1. A method for determining a measurement cell, comprising: determining a candidate frequency list to be measured; the candidate frequency list includes at least one candidate frequency; Calculate the time position of each candidate frequency in the candidate frequency list in the next positioning reference signal time interval PRS occasion starting from the current moment; Selecting the PRS occasion closest to the current moment from the time position of the next PRS occasion of each candidate frequency, and using the frequency corresponding to the PRS occasion closest to the current moment as the frequency to be tested; Determine the cell to be measured under the frequency to be measured. 2. The method according to claim 1, wherein the determining the list of candidate frequencies to be measured comprises: Receiving the detected time difference of arrival OTDOA measurement message sent by the network side device; Divide the measurement cells in the OTDOA measurement message into a measurement cell list according to frequency, and record the cell number, measurement times and measurement status of each measurement cell; When there is a non-empty same-frequency measurement cell list in the measurement cell list, using the same-frequency frequency as a candidate frequency to be measured in the candidate frequency list to be measured; or, When there is a non-empty inter-frequency measurement cell list in the measurement cell list, select a non-empty inter-frequency measurement cell list from the measurement cell list; Calculate the time position of the PRS occasion of the inter-frequency; Judging whether the time position of the PRS occasion of the inter-frequency frequency matches the measurement gap gap, and if yes, determining the inter-frequency frequency as a candidate frequency to be measured. 3. The method according to claim 2, characterized in that, after the inter-frequency frequencies in the measurement cell list are all processed, the method further comprises: If it is judged that no gap request is sent to the network side device, and there is an unmeasurable inter-frequency frequency; calculate the measurement prs offset meas prs offset of the positioning reference signal of each inter-frequency frequency; wherein, the gap request includes all inter-frequency frequencies required gap; Send each inter-frequency and corresponding meas prs offset to the network side device. 4. The method according to claim 1, wherein the determining the cell to be measured under the frequency to be measured comprises: Judging whether the frequency to be tested is a same-frequency frequency, if it is a same-frequency frequency, judging whether the reference cell under the frequency to be tested is in a silent state at the next PRS occasion of the frequency to be tested, and if it is in a non-quiet state, Then use the reference cell under the frequency to be measured as the cell to be measured, and select the Max Measur Cell-1 measurement results in order from the list of cells under the frequency to be measured according to the priority level of the cell as no measurement success, The cell that does not exceed the set maximum number of measurements, and that the PRS occasion is in a non-silent state at the frequency to be measured is used as the cell to be measured; If it is a different frequency or the reference cell is in a silent state at the next PRS occasion of the frequency to be tested, select Max Measur Cell measurement results from the list of cells under the frequency to be tested in order according to the priority level of the cell A cell that has no successful measurement, does not exceed the set maximum number of measurements, and is in a non-silent state for the PR Soccasion under the frequency to be measured is used as the cell to be measured; Wherein, Max Measur Cell is the maximum number of measurable cells. 5. The method according to any one of claims 1 to 4, further comprising: Perform measurement on the determined cell to be measured under the frequency to be measured. 6. The method according to any one of claims 1 to 4, wherein if it is determined that there is no cell to be measured under the frequency to be measured, the method further comprises: The time position of the next PRS occasion of the frequency to be measured is updated to be the time position of the next next PRSoccasion of the frequency to be measured. 7. The method according to claim 6, characterized in that, the method of updating the time position of the next PRS occasion of the frequency to be measured is the time position of the next next PRS occasion of the frequency to be measured is: The time position of the next PRS occasion of the frequency to be measured is added to the period of the PRS occasion as the time position of the next PRS occasion of the frequency to be measured. 8. A device for determining a measurement cell, comprising: A first determining unit, configured to determine a candidate frequency list to be measured; the candidate frequency list includes at least one candidate frequency; A first calculation unit, configured to calculate the time position of the next positioning reference signal time interval PRS occasion starting from the current moment for each candidate frequency in the candidate frequency list; A first selection unit, configured to select the PRS occasion closest to the current moment from the time position of the next PRS occasion of each candidate frequency, and use the frequency corresponding to the PRS occasion closest to the current moment as the frequency to be tested ; The second determining unit is configured to determine the cell to be measured under the frequency to be measured. 9. The device according to claim 8, wherein the first determining unit comprises: a receiving unit, a division unit and a first frequency determination unit; or a receiving unit, a division unit, a second selection unit, a second calculation unit unit, a first judgment unit and a second frequency determination unit; wherein, The receiving unit is configured to receive the detected time difference of arrival OTDOA measurement message sent by the network side device; The division unit is used to divide the measurement cells in the OTDOA measurement message into a measurement cell list according to frequency, and record the cell number, measurement times and measurement status of each measurement cell; The first frequency determining unit is configured to use the same-frequency frequency as a candidate to be measured in the candidate frequency list to be measured when there is a non-empty same-frequency measurement cell list in the measurement cell list divided by the dividing unit frequency; The second selection unit is configured to select a non-empty inter-frequency measurement cell list from the measurement cell list when there is a non-empty inter-frequency measurement cell list in the measurement cell list divided by the division unit; The second calculation unit is configured to calculate the time position of the PRS occasion of the inter-frequency frequency; The first judging unit is configured to judge whether the time position of the PRS occasion of the different frequency matches the measurement gap gap; and send the matching judging result to the second frequency determining unit; The second frequency determining unit is configured to determine the inter-frequency as a candidate frequency to be measured when receiving the matching judgment result sent by the first judging unit. 10. The device according to claim 9, further comprising: The second judging unit is used for judging whether a gap request of a different frequency is sent to the network side device after the different frequencies in the list of cells to be measured are all processed, whether there is an unmeasurable different frequency, and will not be sent The gap request, and the judgment result of the unmeasurable inter-frequency frequency is sent to the third calculation unit; wherein, the gap request includes the gap required by all inter-frequency frequencies; A third calculation unit, configured to calculate the measurement prs offset meas prs offset of each inter-frequency positioning reference signal when the determination result is sent by the second determination unit; The sending unit is configured to send each inter-frequency and corresponding meas prs offset to the network side device. 11. The device according to claim 8, wherein the second determination unit comprises: A third judging unit, configured to judge whether the frequency to be tested is a same-frequency frequency; The fourth judging unit is configured to continue to judge whether the reference cell under the frequency to be tested is in a silent state at the next PRS occasion of the frequency to be tested when the third judging unit judges that it is the same frequency; The first cell determining unit is configured to use the reference cell under the frequency to be measured as the cell to be measured when the fourth judging unit judges that the reference cell is in a non-silent state, and select the reference cell under the frequency to be measured as the cell to be measured, and obtain the reference cell under the frequency to be measured In the cell list, select the Max Measur Cell-1 measurement results in order according to the priority level of the cell. The measurement results are not successful, the maximum number of measurements has not been exceeded, and the PRS occasion is in a non-quiet state under the frequency to be measured. The cell is used as the cell to be measured; The second cell determining unit is configured to determine that the third judging unit is a different frequency, or when the fourth judging unit judges that the reference cell is in a silent state at the next PRS occasion of the frequency to be tested, From the list of cells under the frequency to be tested, select the Max Measur Cell measurement results in order according to the priority level of the cell. The measurement results are not successful, the maximum number of measurements has not exceeded, and the next PRSoccasion at the frequency to be tested A cell in a non-quiet state is used as a cell to be measured; Wherein, Max Measur Cell is the maximum number of measurable cells. 12. The device according to any one of claims 8 to 11, further comprising: a measuring unit, configured to measure the cell to be measured determined by the second determining unit. 13. The device according to any one of claims 8 to 11, further comprising: An updating unit, configured to update the time position of the next PRS occasion of the frequency to be tested to be the next PRS of the frequency to be tested when the second determination unit determines that there is no cell to be measured under the frequency to be measured The occasional time position. 14. The device according to claim 13, wherein the update unit updates the time position of the next PRS occasion of the frequency to be measured to be the time position of the next PRS occasion of the frequency to be measured in the following manner: : Adding the period of the PRS occasion to the time position of the next PRS occasion of the frequency to be measured is used as the time position of the next PRS occasion of the frequency to be measured.