CN104159241B

CN104159241B - One kind measurement cell determining method and device

Info

Publication number: CN104159241B
Application number: CN201310174857.0A
Authority: CN
Inventors: 周晗; 冯淑兰; 刘劲楠
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2013-05-13
Filing date: 2013-05-13
Publication date: 2017-12-22
Anticipated expiration: 2033-05-13
Also published as: CN104159241A

Abstract

The embodiment of the invention discloses one kind measurement cell determining method and device, methods described to include：Determine candidate frequency lists to be measured；The candidate frequency lists include at least one Candidate Frequency；Calculate the time location of next time location reference signals time interval PRS occasion of each Candidate Frequency since current time in the candidate frequency lists；The chosen distance current time nearest PRS occasion from the occasion of PRS next time of each Candidate Frequency time location, using the frequency corresponding to the PRS occasion nearest apart from current time as treating measured frequency；It is determined that the cell list to be measured treated under measured frequency.The embodiment of the present invention is solved in the prior art because missing PRS occasion next time, and the technical problem for causing measurement accuracy to decline.

Description

Method and device for determining measurement cell

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for determining a measurement cell.

Background

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

The OTDOA is a technique for performing positioning according to a time difference between signal transmissions of an Evolved Node B (eNB) and a User Equipment (UE). Fig. 1 is a schematic diagram of the OTDOA positioning principle in the prior art, as shown in fig. 1. In fig. 1, an eNB1 (reference eNB) adds a Positioning Reference Signal (PRS) to a downlink signal to be transmitted, periodically transmits a PRS signal (minimum period is 160ms, maximum period is 1280 ms), and an eNB1 transmits PRS signals of consecutive downlink subframes in each period, which is called a prsoccersion. The UE performs correlation operation on the received multiple downlink PRS signals, calculates the difference between the arrival times of the PRS signals of each neighbor eNB (such as eNB2 and eNB 3) and eNB1, and reports the measurement value of the observed arrival time difference to the network side device. The network side equipment determines that the UE is on a hyperbola a with the eNB1 as a focus according to the measured value of the difference value of the time of arrival of the PRS signals of the eNB2 and the eNB1, as shown in fig. 1 in particular; the UE is determined to be on hyperbola B with the focus of eNB1 based on the measured value of the difference in time of arrival of the PRS signals from eNB3 and eNB1, so that the intersection of a and B is the location of the UE.

In the prior art, the OTDOA positioning method requires measuring time difference of arrival (RSTD) of multiple cells and a Reference cell, and 3GPP requires that UE can measure cells of maximum 3 frequency layers each of which at least 16 cells are to be measured in about 16 PRS periods (PRS period is 160ms minimum and 1280ms maximum). Due to the limited measurement capability of the UE, it may take a long time to measure all cells of one PRS occase, and the PRS period may be exceeded, so that one PRS occase is missed. On the other hand, even if the UE does not measure one PRS occase for more than one PRS occase, when measuring RSTD of multiple frequencies, the UE may not finish measuring PRS occase of the next frequency before the prsoccosase of the next frequency starts; moreover, since a cell may be silent (muted) within a certain PRS occasion, the cell is scheduled to have no measurement result in the muted PRS occasion.

Therefore, how to effectively determine the measurement cell and reasonably utilize the UE measurement resource and the PRS occase resource to meet the measurement requirement of 3GPP is a problem to be solved for measuring OTDOA.

Disclosure of Invention

The embodiment of the invention provides a method and a device for determining a measurement cell, which are used for solving the technical problem of low measurement precision caused by missing next PRS (PRS) occasion in the prior art.

In order to solve the technical problem, the embodiment of the invention discloses the following technical scheme:

a 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 comprises at least one candidate frequency;

calculating the time position of the next positioning reference signal time interval PRS occase of each candidate frequency in the candidate frequency list from the current moment;

selecting the PRS occase closest to the current time from the time position of the next PRS occase of each candidate frequency, and taking the frequency corresponding to the PRS occase closest to the current time as the frequency to be measured;

and determining 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 a detection time difference of arrival (OTDOA) measurement message sent by network side equipment;

dividing the measurement cells in the OTDOA measurement message into a measurement cell list according to frequency, and recording the cell number, the measurement times and the measurement state of each measurement cell;

when a non-empty co-frequency measurement cell list exists in the measurement cell list, taking the co-frequency as a candidate frequency to be measured in a candidate frequency list to be measured;

or,

when a non-empty pilot frequency measuring cell list exists in the measuring cell list, selecting a non-empty pilot frequency from the measuring cell list;

calculating the time position of PRS occasting of the pilot frequency;

and judging whether the time position of the PRS occase of the pilot frequency is matched with the measurement gap, and if so, determining that the pilot frequency is the candidate frequency to be measured.

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

if the gap request is not sent to the network side equipment and the measurable pilot frequency exists, judging whether the gap request is sent to the network side equipment or not; calculating a measured prs offset meas offset for the positioning reference signal for each pilot frequency; wherein the gap request comprises the gap required by all pilot frequencies;

and sending each pilot frequency and the corresponding meas prs offset to the network side equipment.

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

judging whether the frequency to be measured is the same frequency, if so, judging whether a PRS occase of the reference Cell under the frequency to be measured is in a silent state at the next time of the frequency to be measured, if not, taking the reference Cell under the frequency to be measured as a Cell to be measured, and sequentially selecting Max Measur cells-1 measurement results from a Cell list under the frequency to be measured according to the priority level of the Cell as the maximum measurement times which are not measured successfully and do not exceed the set value, and taking the Cell which is in the non-silent state at the next time of the PRS occase of the frequency to be measured as the Cell to be measured;

if the frequency is different or the next PRS occase of the reference cell at the frequency to be measured is in a silent state, sequentially selecting Max MeasureCell measurement results which are not successfully measured and do not exceed a set maximum measurement frequency from a cell list at the frequency to be measured according to the priority level of the cell, and taking the cell which is in a non-silent state at the next PRS occase at the frequency to be measured as a cell to be measured;

the Max measure Cell is the maximum number of measurable cells.

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

and measuring the determined cell to be measured under the frequency to be measured.

With reference to the first aspect or the first or second or third or fourth possible implementation manner of the first aspect, in a fifth possible implementation manner, if it is determined that there is no cell to be measured under the frequency to be measured, the method further includes:

and updating the time position of the next PRS occase of the frequency to be detected as the time position of the next PRS occase of the frequency to be detected.

With reference to the first aspect or the first or second or third or fourth or fifth possible implementation manner of the first aspect, in a sixth possible implementation manner, the updating that the time position of the next PRS occase of the frequency to be measured is performed in a manner of:

and adding the time position of the next PRS occase of the frequency to be measured and the period of the PRS occase to be used as the time position of the next PRS occase of the frequency to be measured.

A second aspect provides a determination apparatus of a measurement cell, the apparatus comprising:

a first determination unit configured to determine a candidate frequency list to be measured; the candidate frequency list comprises at least one candidate frequency;

a first calculating unit, configured to calculate a time position of a next positioning reference signal time interval PRS occast of each candidate frequency in the candidate frequency list from a current time;

a first selecting unit, configured to select a PRS occase closest to a current time from a time position of a next PRS occase of each candidate frequency, and use a frequency corresponding to the PRS occase closest to the current time as a frequency to be measured;

and the second determining unit is used for determining 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; the device comprises a receiving unit, a dividing unit, a second selecting unit, a second calculating unit, a first judging unit and a second frequency determining unit; wherein,

the receiving unit is configured to receive an OTDOA measurement message sent by a network side device;

the dividing unit is configured to divide the measurement cells in the OTDOA measurement message into a measurement cell list according to frequency, and record a cell number, measurement times, and a measurement state of each measurement cell;

the first frequency determining unit is configured to, when a non-empty intra-frequency measurement cell list exists in the measurement cell lists divided by the dividing unit, use the intra-frequency as a candidate frequency to be measured in a candidate frequency list to be measured;

the second selecting unit is configured to select a non-null inter-frequency from the measurement cell list when a non-null inter-frequency measurement cell list exists in the measurement cell list divided by the dividing unit;

the second calculating unit is configured to calculate a time position of the PRS occase of the pilot frequency;

the first judging unit is configured to judge whether a time position of the PRS occasting of the pilot frequency is matched with a measurement gap; sending the matching judgment result to a second frequency determination unit;

and the second frequency determining unit is used for determining the different 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 apparatus further includes:

a second judging unit, configured to judge whether a gap request of a pilot frequency is sent to a network side device and whether an undetectable pilot frequency exists after all pilot frequencies in the cell list to be measured are processed, and send a judgment result that the gap request is not sent and the undetectable pilot frequency exists to a third calculating unit; wherein the gap request comprises the gap required by all pilot frequencies;

a third calculating unit configured to calculate a measurement prs offset meas prs offset of the positioning reference signal for each pilot frequency, in the case of the determination result sent by the second determining unit;

and the sending unit is used for sending each pilot frequency and the corresponding meas prs offset to the network side equipment.

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 determining unit includes:

the third judging unit is used for judging whether the frequency to be detected is the same frequency;

a fourth judging unit, configured to, when the third judging unit judges that the frequency is the same frequency, continuously judge whether the PRS occase of the reference cell at the frequency to be detected next time is in a silent state;

a first Cell determining unit, configured to, when the fourth determining unit determines that the reference Cell is in a non-silent state, use the reference Cell under the frequency to be measured as a Cell to be measured, and select, from a Cell list under the frequency to be measured, Max measurement Cell-1 measurement results in sequence according to the priority levels of the cells, as cells to be measured, where the measurement results are unsuccessful and do not exceed a set maximum measurement number, and use a Cell under the frequency to be measured, where PRS occase is in a non-silent state, as a Cell to be measured;

a second Cell determining unit, configured to, when the third determining unit determines that the frequency is the pilot frequency, or when the fourth determining unit determines that the next PRS interference of the reference Cell at the frequency to be measured is in the silence state, sequentially select Max measurement Cell numbers as the cells that have not been measured successfully and do not exceed a set maximum measurement number according to the priority levels of the cells from a Cell list of the frequency to be measured, and select the Cell that has been in the non-silence state at the frequency to be measured as the Cell to be measured;

the Max measure Cell is the maximum number of measurable cells.

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

and the measuring unit is used for measuring the cell to be measured determined by the second determining unit.

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

and the updating unit is used for updating the time position of the next PRS occasion of the frequency to be measured to be the time position of the next PRSoccasion of the frequency to be measured when the second determining unit determines that the cell to be measured does not exist under the frequency to be measured.

With reference to the second aspect or the first or second or third or fourth or fifth possible implementation manner of the second aspect, in a sixth possible implementation manner, a manner that the updating unit updates a time position of a next prsoccategory of the frequency to be measured to a time position of a next prsoccategory of the frequency to be measured is:

According to the technical scheme, in the embodiment of the invention, a candidate frequency list to be measured is determined, then the frequency corresponding to the PRS occase closest to the current moment in the time position of the next PRS occase of the candidate frequency in the candidate frequency list is selected as the frequency to be measured, and the cell to be measured under the frequency to be measured is determined, namely, the frequency and the cell to be measured of the next measurement are reasonably selected in the embodiment of the invention, so that the technical problem of measurement precision reduction caused by missing the next PRSoccase is effectively avoided; the waste of measurement resources, time and power caused by repeated invalid measurements of the same cell is effectively avoided, and the measurement efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

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

fig. 2 is a flowchart of a method for determining a measurement cell according to an embodiment of the present invention;

fig. 3 is a flowchart of another method for determining a measured cell according to an embodiment of the present invention;

FIG. 4 is a flowchart of the determination of the candidate frequency list to be measured in FIG. 3;

fig. 5 is a flowchart of determining a cell to be measured under the frequency to be measured in fig. 3;

fig. 6 is a schematic diagram illustrating a ue receiving a pattern sent by a network side device in Prs occasion according to an embodiment of the present invention;

fig. 7 is a schematic diagram illustrating a ue receiving another pattern sent by a network side device in Prs occasion according to an embodiment of the present invention;

fig. 8 is a schematic diagram of a pattern for transmitting Prs by a UE according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a device for determining a measurement cell according to an embodiment of the present invention;

fig. 10 is another schematic structural diagram of a determining apparatus for measuring a cell according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In this application example, before performing each OTDOA measurement, the UE determines the frequency measured in the next PRS occase and the measured cell 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 whether the cell is muted (muted) in the next positioning reference signal time interval (PRS occase).

Before the embodiment of the present invention is introduced, the following parameter settings are made:

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

failed: indicating that the cell has not been measured or has not been successfully measured;

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

and (4) Success: indicating that the cell has been successfully measured;

typically, the initial measurement state of each cell is Failed.

2. Each cell is allocated with a cell measurement count (Measure Num) for recording the number of times the cell is repeatedly subjected to TOA measurement, and the initial measurement count (Measure Num) is 0, i.e., Measure Num = 0.

3. Setting the maximum measurement times Max Num Repeat Measure for other cells except the RSTD reference cell, wherein the maximum measurement times are set according to the UE RSTD measurement capability, the UE RSTD measurement capability is strong, and the value of Max Num Repeat Measure is large; the UE RSTD measuring capability is strong, and the value of Max Num Repeat measure is small. The maximum number of measurements may be 4 in general, but is not limited thereto, and may be adaptively modified according to practical situations, such as 5, 7, 10, and so on.

4. Classifying cells to be measured according to frequency; and setting the measurement priority of each cell, wherein the setting of the measurement priority is set according to the sequence of issuing measurement cells by a high layer, the priority of the former cell is high, and the priority of the latter cell is low.

Referring to fig. 2, fig. 2 is a flowchart illustrating a method for determining a measurement cell according to an embodiment of the present invention; the method comprises the following steps:

step 201: determining a candidate frequency list to be measured; the candidate frequency list comprises at least one candidate frequency;

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

firstly, user equipment UE receives an OTDOA measurement message sent by network side equipment, where the OTDOA measurement message may include: measurement frequencies to be measured, measurement cell id at each measurement frequency, time information (or time position information) of a positioning reference signal time interval (PRS epoch) of a measurement cell, measurement cell muting information, and the like.

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

then, the UE determines whether a non-empty co-frequency measurement cell list exists 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, the co-frequency is used as a candidate frequency to be measured in the candidate frequency list to be measured; if not, ending the process;

then, UE continues to judge whether there is a non-empty pilot frequency measurement cell list in the measurement cell list, if yes, a non-empty pilot frequency is selected from the measurement cell list; calculating the time position of the PRSoccasion of the pilot frequency; then, judging whether the time position of the PRS occase of the pilot frequency is matched with the measurement gap, if so, determining the pilot frequency as a candidate frequency to be measured; otherwise, determining the pilot frequency as an undetectable pilot frequency;

whether the time position of the PRS occasion is matched with the measurement gap can be determined by the coincidence condition of the time position of the PRS occasion and the gap, in a general case, the PRS occasion and the gap both include six subframes, for example, in the case of a large bandwidth, at least one subframe of the PRS occasion and the gap coincides in time, in the case of a small bandwidth ratio, several subframes may coincide in time, specifically, depending on the situation, 2 subframes coincide in time, or 3 or 4 subframes coincide in time, and the like.

Then, if there are other non-null pilot frequencies in the measurement cell list, re-executing the step of selecting the pilot frequency of one pilot frequency cell to be measured, that is, selecting the pilot frequency of the next pilot frequency cell to be measured from the measurement cell list, calculating the time position of PRS occase of the pilot frequency, judging whether the time position of PRS occase matches with the measurement gap, and if so, determining that the pilot frequency is a candidate frequency to be measured; otherwise, determining the pilot frequency as an undetectable pilot frequency. And calculating the frequency of the non-empty pilot frequency cells to be measured in the cell list to be measured.

Optionally, after the pilot frequencies in the measured cell list are processed, the UE determines whether a gap request of the pilot frequencies is sent to the network side device, and whether there is no unmeasured pilot frequency, where the gap request includes gaps required by all pilot frequencies; if not, calculating the measured prs offset measprs offset of the positioning reference signal of each pilot frequency; and sending each pilot frequency and the corresponding meas prs offset to the network side equipment.

That is, 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 is ended; if the gap request is not sent, judging whether an unmeasured pilot frequency exists; if yes, calculating the measured prs offset meas offset of the positioning reference signal of each pilot frequency; sending each pilot frequency and corresponding meas prs offset to network side equipment; otherwise, the process is ended.

Of course, the UE may also first determine whether there is an unmeasured pilot frequency, and if there is no unmeasured pilot frequency, the process is ended; if measurable pilot frequency exists, judging whether a gap request is sent to network side equipment or not; if not, calculating the measured prs offset meas offset of the positioning reference signal of each pilot frequency; sending each pilot frequency and corresponding meas prs offset to network side equipment; otherwise, the process is ended.

The process of determining the candidate frequency list to be measured is specifically shown in fig. 4, and will not be described in detail here.

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

in this embodiment, the time position of the first common-frequency PRS occase is calculated, and then the time position of the next PRS occase of each candidate frequency from the current time is calculated according to the time position of the first common-frequency prsoccategory.

Step 203: selecting the PRS occase closest to the current time from the time position of the next PRS occase of each candidate frequency, and taking the frequency corresponding to the PRS occase closest to the current time as the frequency to be measured;

that is, the time positions of the next PRS occase of several candidate frequencies are compared, and the frequency corresponding to the PRS occase closest to the current time is selected as the frequency to be measured.

Step 204: and determining the cell to be measured under the frequency to be measured.

Whether a cell to be measured exists under the frequency to be measured is firstly judged, that is, the frequency to be measured can include the cell to be measured which needs to be measured at this time, and also can include zero cells to be measured, that is, no cell to be measured which needs to be measured exists.

If the frequency to be measured includes the cell to be measured which needs to be measured, a process of determining the cell to be measured under the frequency to be measured is as follows:

firstly, judging whether the frequency to be measured is the same frequency, if so, judging whether a reference Cell under the frequency to be measured is in a silent state at next PRS occasion of the frequency to be measured, if so, taking the reference Cell under the frequency to be measured as a Cell to be measured, and sequentially selecting Max Measure Cell-1 measurement results which are not successfully measured and not exceed a set maximum measurement frequency from a Cell list under the frequency to be measured according to the priority level of the Cell, and taking the Cell under the next PRS occasion of the frequency to be measured as the Cell to be measured;

for example, if the UE can measure at most 8 cells at a time according to its own performance, if the reference cell under the same frequency to be measured is taken as the cell to be measured, it is further required to select 7 cells from the cell list under the same frequency to be measured as the cell to be measured, and the selection method may select the cells in order from high to low according to the priority of each cell that the measurement result of the cell is unsuccessful in measurement and does not exceed the set maximum measurement number, and the cell whose next PRS occasion is in a non-silent state is taken as the cell to be measured.

If the frequency to be measured is the pilot frequency or the reference Cell is in the silent state, sequentially selecting Max Measure Cell measurement results which are not successful in measurement and do not exceed the set maximum measurement times from a Cell list under the frequency to be measured according to the priority level of the Cell, and taking the Cell in the non-silent state of next PRS occase at the frequency to be measured as the Cell to be measured;

the Max measure Cell is the maximum number of measurable cells.

The flowchart for determining the list of cells to be measured at the frequency to be measured is shown in fig. 5, and is not described herein again.

In the embodiment of the invention, a candidate frequency list to be measured is determined, then the frequency corresponding to the PRS occase closest to the current moment in the time position of the next PRS occase of the candidate frequency in the candidate frequency list is selected as the frequency to be measured, and the cell to be measured under the frequency to be measured is determined, namely, the frequency and the cell to be measured of the next measurement are reasonably selected in the embodiment of the invention, so that the technical problem of measurement accuracy reduction caused by missing the next PRS occase is effectively avoided; the waste of measurement resources, time and power caused by repeated invalid measurements of the same cell is effectively avoided, and the measurement efficiency is improved.

Referring to fig. 3, fig. 3 is a flowchart of another method for determining a measured cell according to an embodiment of the present invention, where the method includes:

step 300: determining a candidate frequency list to be measured;

in this step, the user equipment determines a candidate frequency list to be measured according to an OTDOA measurement message sent by the network side equipment. The process of determining the candidate frequency list to be measured is shown in fig. 4, and will not be described herein.

Step 301: the UE determines whether the candidate frequency list to be measured is empty (i.e. whether the candidate frequency list to be measured is included), if not, executes step 303; if yes, go to step 302: the flow is ended;

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

the calculation process is described above, and is not described herein again.

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

step 305: the UE determines whether a cell to be measured exists under the frequency to be measured; if so, go to step 306; otherwise, go to step 308;

typically, there are multiple cells at a frequency to be measured. The UE needs to determine which cells in a plurality of cells under the UE are the cells that need to be measured this time, i.e. the cells to be measured. Which cells do not require this measurement. The determination mode can be determined according to the conditions of whether the measurement times of the cell exceed the set maximum measurement times, whether the measurement state is successful or failed, or the measurement result is not good, and the like.

The determined cells to be measured may be one or more cells that need to be measured at the frequency to be measured, and certainly, there may also be no cells that need to be measured at the frequency to be measured, that is, there is no cell to be measured.

A flowchart of determining the cell to be measured under the frequency to be measured by the UE is shown in fig. 5, which is not described herein again.

Step 306: determining a cell to be measured under the frequency to be measured;

the determination process is described in detail above.

Step 307: measuring the determined measurement cell;

after the measurement is finished, the process is finished.

The measurement procedure for the cell is well known in the art and will not be described in detail herein.

Step 308: updating the time position of the next PRS occase of the frequency to be detected as the time position of the next PRS occase of the frequency to be detected; then returning to step 304, and continuing to select the frequency to be measured.

In the embodiment of the invention, whether the cell to be measured exists in the cell list to be measured is further judged, when the cell to be measured exists in the cell list to be measured, the cell to be measured is directly measured, and when the cell to be measured does not exist, the time position of the next PRS occase of the cell to be measured is updated to be the time position of the next PRS occase of the frequency to be measured, so that the cell measuring efficiency is improved.

Referring to fig. 4, fig. 4 is a flowchart of determining a candidate frequency list to be measured in fig. 3, in this embodiment, taking a first measurement as an example, including:

step 401: UE receives an OTDOA measurement message sent by network side equipment;

that is to say, the UE receives a pattern sent by the network side device in Prs occase, where the pattern is shown in fig. 6, and fig. 6 is a schematic diagram of the UE receiving one pattern of Prs occase sent by the network side device in the embodiment of the present invention;

as shown in fig. 6, time 0 is the time at which selection of a candidate frequency is started.

Assuming that f1 is the same frequency, the cells to be measured on frequency f1 are exemplified by cells C01 and C02;

assuming that f2 is a pilot frequency, the cells to be measured on the frequency f2 are exemplified by cells C11 and C12;

step 402: the UE divides the measuring cells in the OTDOA measuring message into a measuring cell list according to the frequency, and records the cell number, the measuring times and the measuring state of each measuring cell;

the list of cells to be measured is shown in table 1, and includes a co-frequency measurement cell list and an inter-frequency measurement cell list, where the co-frequency measurement cell list and the inter-frequency measurement cell list respectively include frequencies, cell numbers, measurement times, and measurement states.

TABLE 1

Step 403: the UE judges whether a same-frequency measurement cell list in the cell list to be measured is empty, if so, the step 404 is executed; ending the process; otherwise, go to step 405;

in this embodiment, the UE finds that there is a measurement cell to be measured in the intra-frequency measurement cell list, i.e. the intra-frequency measurement cell list is non-empty; otherwise, that is, the measurement cell to be measured does not exist in the same-frequency measurement cell list, the same-frequency measurement cell list is empty.

In this embodiment, it is found that there are two cells to measure at the same frequency (f 1). From the number of measurements in table 1, the measurements for both cells are the first measurements.

Step 405: the UE selects the same frequency f1 as a candidate frequency to be measured; i.e. as one of the candidate frequencies to be measured;

step 406: the UE determines whether there is a non-empty inter-frequency measurement cell list in the measurement cell list, and if so, executes step 407; otherwise, go to step 408: ending the process;

in this embodiment, the UE finds that there is a non-null inter-frequency f2 and there are two cells under the inter-frequency f2 to measure.

Step 407: the UE selects a non-empty pilot frequency from the measuring cell list;

i.e. the pilot frequency f2 is selected.

Step 409: the UE calculates the time position of PRS occase of the pilot frequency;

in this embodiment, as shown in fig. 6, the UE calculates the time position of PRS occase 2 of the pilot frequency of f2 to be 15 to 21. In FIG. 6, the solid line box denoted by reference numeral 1 represents Prs occasting 1; the solid line box corresponding to reference numeral 2 represents Prsoccasion 2; the dashed box corresponds to the measurement gap.

Step 410: the UE judges whether the time position of the PRS occase is matched with the measurement gap; if yes, go to step 411; otherwise, go to step 412;

in this step, if the bandwidth is relatively large, if the UE finds that the time from the beginning to the end of the gap is coincident with the time position of the PRS occase, the different frequency may be the candidate frequency to be measured; otherwise, determining the pilot frequency as an undetectable pilot frequency.

Of course, in the case of a relatively small bandwidth, at least several subframes may be overlapped in time to determine the inter-frequency as the candidate frequency to be measured. The specific subframes need to be as appropriate. In this embodiment, the position of the gap is 8 to 14, and since the time position of the PRS occase 2 does not coincide with the gap, the time position of the PRS occase 2 does not match the gap, step 412 is performed.

Step 411: determining the pilot frequency as a candidate frequency to be measured; step 413 is executed;

step 412: determining the pilot frequency as an undetectable pilot frequency; step 413 is executed;

i.e., f2 is determined to be an undetectable pilot frequency. In this embodiment, f2 is determined to be an undetectable pilot frequency.

Step 413: the UE determines whether all the different frequencies in the measured cell list have been processed, and if so, executes step 414; otherwise, return to step 407;

in this embodiment, since there is only one inter-frequency f2 in the cell list to be measured, all the processing is completed, and of course, in other embodiments, if there are multiple inter-frequencies, the steps of the above steps 407 to 414 need to be continued until the inter-frequency is processed.

Step 414: the UE determines whether a gap request is sent to the network side device, determines whether there is no undetectable pilot frequency, and if both, executes step 415: ending the process; if both are false, go to step 416;

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, end the process; if the gap request is not sent, judging whether an unmeasured pilot frequency exists; if so, go to step 416; otherwise, the process is ended.

Of course, the UE may also first determine whether there is an unmeasured pilot frequency, and if there is no unmeasured pilot frequency, the process is ended; if measurable pilot frequency exists, judging whether a gap request is sent to network side equipment or not; if not, go to step 416; otherwise, the process is ended.

In this step, the gap request includes all the gap required by the pilot frequency, i.e., includes the pilot frequency as a candidate frequency, and the pilot frequency that is not measurable. In this embodiment, since f2 is an unmeasured frequency, step 416 is performed.

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

in this embodiment, since there is only one pilot frequency f2, only the meas prs offset of pilot frequency f2 is calculated, and of course, if there are multiple pilot frequencies, it is necessary to calculate all of the meas prs offsets of the respective pilot frequencies.

Step 417: and the UE reports each pilot frequency and the corresponding measured prs offset (meas prsoffset) to the network side equipment.

In this embodiment, meas prs offsets for f2 and f2 are reported.

In the embodiment described in fig. 4, each cell takes the first measurement as an example, and the following illustrates a case where there is a non-first measurement in each cell, assuming that another pattern of receiving, by the UE, the Prs occasion sent by the network side device is as described in fig. 7, where fig. 7 is a schematic diagram of receiving, by the user equipment, another pattern of sending, by the Prs occasion sent by the network side device in the embodiment of the present invention. In FIG. 7, the solid line box denoted by reference numeral 1 represents Prs occasting 1; the solid line box corresponding to reference numeral 2 represents Prsoccasion 2; the dashed box corresponds to the measurement gap.

As can be seen from fig. 7, time 10 is the time at which the selection of the candidate frequency is started.

Assuming that f1 is the same frequency, the cells to be measured on frequency f1 are exemplified by cells C00 and C01;

assuming that f2 is a pilot frequency, the cells to be measured on the frequency f2 are exemplified by cells C10 and C11;

then, dividing the measurement cells in the OTDOA measurement message into a measurement cell list according to frequency, and recording the cell number, the measurement times, and the measurement state of each measurement cell, wherein the measurement cell list includes a same-frequency measurement cell list and an inter-frequency measurement cell list as shown in table 2;

TABLE 2

Then, the UE judges whether a non-empty common-frequency measuring cell list exists in the measuring cell list or not;

in this embodiment, it is found that the measurement of the intra-frequency cell C00 is successful without re-measurement, the number of C01 measurements reaches the maximum number of measurements, and no measurement is needed, so the intra-frequency measurement cell list is empty.

Then, whether a non-null pilot frequency measurement cell list exists in the measurement cell list is judged, and the pilot frequency f2 is found to exist, and two cells need to be measured, namely, the two cells are not null.

Then, a non-null pilot frequency is selected from the measurement cell list, and the pilot frequency f2 is selected in this embodiment, which is the same as the process in fig. 4, and is described in detail above, and is not described again here.

Then, if the pilot frequency f2 is determined to be a candidate frequency, step 413 is executed to determine whether all pilot frequencies have been processed, and if so, the subsequent steps are the same as the above steps, which is described in detail above and will not be repeated herein.

In the embodiment of the invention, because the maximum measurement times of each cell are limited and the repeated measurement is not carried out after the cell measurement is successful, the meaningless repeated measurement of one cell can be effectively avoided, thereby effectively avoiding the waste of time and power. Due to the fact that the number of cells measured each time is limited according to the measurement capability of the UE, the PRS occase is effectively prevented from being missed.

Fig. 5 is a flowchart of fig. 3 for determining that the cell under the frequency to be measured is the cell to be measured, in which in this embodiment, the pattern that the UE receives the Prs sent by the network side device is shown in fig. 8, and fig. 8 is a schematic diagram that the UE receives the pattern that the network side device sends the Prs according to the embodiment of the present invention. As can be seen from fig. 8: in prsoccosation 1, cells C00 and C01 both transmit prs; in prs occasting 2, both cells C10 and C11 transmit prs; in prsoccation 3, only cell C00 sends prs; in prs occasting 4, only cell C10 transmits prs; in prsoccation 5, only cell C01 sends prs;

in this embodiment, the candidate frequency list to be measured is shown in table 3, and cell C00 is the RSTD reference cell.

TABLE 3

The embodiment is based on the above embodiment, namely f1 is determined to be the same frequency; the implementation process comprises the following steps:

: step 501: the UE judges whether the frequency to be detected is the same frequency, if so, the step 502 is executed; otherwise, go to step 505;

in this embodiment, the frequencies f1 to be measured are the same frequency. And suppose that the cell C00 under the frequency f1 to be measured is an RSTD reference cell.

Step 502: the UE determines whether the reference cell (i.e. cell C00) under the frequency to be measured is in a silent (muting) state, if not, performs step 503; if yes, go to step 505;

in this embodiment, it is assumed that the cell C00 with the frequency f1 to be measured sends prs in prsocpration 1, so the state of the cell C00 is in an immorting state; of course, if prs is not transmitted at prsoccation 1, the state of cell C00 is a silent state.

Step 503: taking a reference cell (namely a cell C00) at the frequency to be measured as a measurement cell; and

step 504: sequentially selecting Max Measure Cell-1 measurement results which are not successfully measured and do not exceed a set maximum measurement frequency from the Cell list under the frequency to be measured according to the priority level of the Cell, and selecting a Cell in a non-silent state at the next PRS occase under the frequency to be measured as a Cell to be measured; wherein, the MaxMeasure Cell is the maximum number of measurable cells;

step 505: and sequentially selecting Max Measure Cell measurement results which are not successfully measured and do not exceed the set maximum measurement times from the Cell list under the frequency to be measured according to the priority level of the Cell, and selecting the Cell in which the next PRS occase under the frequency to be measured is in a non-silent state as a Cell to be measured.

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

The invention provides a selection method of an OTDOA positioning measurement cell, which comprehensively considers the conditions of OTDOA measurement requirements, the PRS (general purpose processor) configuration for OTDOA measurement, the OTDOA measurement capability of UE (user equipment), the signal quality of a cell, the measurement times of the cell and the like, reasonably selects the frequency and the cell for next measurement, and utilizes the measurement capability of the UE and the PRS occasioin to the maximum extent to meet the OTDOA measurement of each cell of a required frequency layer.

Based on the implementation process of the foregoing method, an embodiment of the present invention further provides a device for determining a measured cell, where a schematic structural diagram of the device is shown in fig. 9, and the device includes: a first determining unit 91, a first calculating unit 92, a first selecting unit 93 and a second determining unit 94, wherein the first determining 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 calculating unit 92 is configured to calculate a time position of a next positioning reference signal time interval PRS occase of each candidate frequency in the candidate frequency list from a current time; the first selecting unit 93 is configured to select a PRS occase closest to a current time from a time position of a next PRS occase of each candidate frequency, and use a frequency corresponding to the PRS occase closest to the current time as a frequency to be measured; the second determining unit 94 is configured to determine a cell to be measured under the frequency to be measured.

In another embodiment, on the basis of the embodiment of fig. 9, the first determining unit 91 includes: a receiving unit 911, a dividing unit 912, a first frequency determining unit 913; and/or comprises: a receiving unit 911, a dividing unit 912, a second selecting unit 914, a second calculating unit 915, a first judging unit 916, and a second frequency determining unit 917; fig. 10 is a schematic structural diagram of a determination apparatus for measuring a cell according to an embodiment of the present invention, where fig. 10 is another schematic structural diagram of the determination apparatus for measuring a cell according to the present invention; in fig. 10, two cases are included at the same time, wherein,

the receiving unit 911 is configured to receive an OTDOA measurement message sent by a network side device; the dividing unit 912 is configured to divide the measurement cells in the OTDOA measurement message into a measurement cell list according to frequencies, and record a cell number, a measurement number, and a measurement state of each measurement cell; the first frequency determining unit 913 is configured to, when a non-empty intra-frequency measurement cell list exists in the measurement cell lists partitioned by the partitioning unit, take the intra-frequency as a candidate frequency to be measured; the second selecting unit 914, configured to select a non-null inter-frequency from the measurement cell list when there is a non-null inter-frequency measurement cell list in the measurement cell list partitioned by the partitioning unit; the second calculating unit 915, configured to calculate a time position of a PRS occase of the pilot frequency; the first judging unit 916 is configured to judge whether a time position of the PRS occase of the pilot frequency is matched with a measurement gap; the matching determination result is sent to the second frequency determination unit 917, and the second frequency determination unit 917 is configured to determine the different frequency as a candidate frequency to be measured when receiving the matching determination result sent by the first determination unit 916.

In another embodiment, based on the above embodiment, after the pilot frequencies in the cell list to be measured are all processed, the apparatus may further include: a second judging unit, a third calculating unit and a transmitting unit,

the second judging unit is connected to the second frequency determining unit, and configured to judge whether a gap request of the inter-frequency is sent to a network side device or not and whether an undetectable inter-frequency exists or not after all the inter-frequencies in the cell list to be measured are processed, and send a judgment result that the gap request is not sent and the undetectable inter-frequency exists to the third calculating unit; wherein the gap request comprises the gap required by all pilot frequencies; the third calculating unit is configured to calculate a measurement prs offset meas offset of the positioning reference signal for each pilot frequency when the second determining unit sends no gap request and an unmeasured pilot frequency; the sending unit is configured to send each inter-frequency and the corresponding meas prs offset to the network side device.

The second determining unit may determine whether a gap request is sent to the network side device, and if not, determine whether an unmeasurable frequency exists; or judging whether the frequency is not measurable or not, if so, judging whether a gap request is sent to the network side equipment or not.

In another embodiment, on the basis of the above embodiment, the second determining unit includes: the system comprises a third judging unit, a fourth judging unit, a first cell determining unit and a second cell determining unit. Wherein,

the third judging unit is used for judging whether the frequency to be detected is the same frequency; the fourth judging unit is configured to, when the third judging unit judges that the frequency is the same frequency, continuously judge whether the PRS occase of the reference cell at the frequency to be detected is in a silent state at the next time of the frequency to be detected; the first Cell determining unit is configured to, when the fourth determining unit determines that the reference Cell is in a non-silent state, use the reference Cell under the frequency to be measured as a Cell to be measured, sequentially select MaxMeasur Cell-1 measurement results from a Cell list under the frequency to be measured according to the priority levels of the cells, where the MaxMeasur Cell-1 measurement results are that no measurement is successful and do not exceed a set maximum measurement time, and use a Cell under the frequency to be measured, where PRS occase is in a non-silent state, as a Cell to be measured; the second Cell determining unit is configured to, when the third determining unit determines that the frequency is the pilot frequency, or when the fourth determining unit determines that the next PRS occase of the reference Cell at the frequency to be measured is in the silent state, sequentially select Max measurement cells from a Cell list of the frequency to be measured according to the priority levels of the cells, where the Max measurement cells have measurement results that are not successfully measured and do not exceed a set maximum measurement time, and use a Cell at the next PRS occase of the frequency to be measured in a non-silent state as a Cell to be measured; the Max measure Cell is the maximum number of measurable cells.

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

Optionally, in another embodiment, the apparatus may further include: an updating unit, configured to update a time position of a next PRS occase of the frequency to be measured to be a next PRS occase of the frequency to be measured when the second determining unit determines that the cell to be measured does not exist under the frequency to be measured; the first selection unit is used for: and selecting the frequency corresponding to the PRSoccasion closest to the current moment in the time position of the next PRS occase of the frequency to be detected as the frequency to be detected.

Wherein, the mode that the updating unit updates the time position of the next PRS occase of the frequency to be measured as the time position of the next PRS occase of the frequency to be measured is as follows: and adding the time position of the next PRSoccasion of the frequency to be measured and the period of the PRS occase as the time position of the next PRSoccasion of the frequency to be measured.

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

An embodiment of the present invention further provides a user equipment, where the user equipment includes: the schematic structural diagram is shown in fig. 11, and the user equipment 1 includes: a transceiver 10 and a processor 11.

The transceiver 10 is configured to receive a detection time difference of arrival OTDOA measurement message sent by a network side device; the processor 11 is configured to determine a candidate frequency list to be measured according to the OTDOA measurement message received by the transceiver; the candidate frequency list comprises at least one candidate frequency; calculating the time position of the next positioning reference signal time interval PRS occase of each candidate frequency in the candidate frequency list from the current moment; selecting the PRS occase closest to the current time from the time position of the next PRS occase of each candidate frequency, and taking the frequency corresponding to the PRS occase closest to the current time as the frequency to be measured; and determining the cell to be measured under the frequency to be measured.

Optionally, the process of determining the candidate frequency list to be measured by the processor includes: the processor divides the measured cells in the OTDOA measurement message into a measured cell list according to the frequency, and records the cell number, the measurement times and the measurement state of each measured cell; if a non-empty co-frequency measurement cell list exists in the measurement cell list, taking the co-frequency as a candidate frequency to be measured in the candidate frequency list to be measured; if a non-empty pilot frequency measuring cell list exists in the measuring cell list, selecting a non-empty pilot frequency from the measuring cell list; calculating the time position of PRS occasting of the pilot frequency; judging whether the time position of the PRS occase of the pilot frequency is matched with a measurement gap, if so, determining the pilot frequency as a candidate frequency to be measured; otherwise, determining the pilot frequency as an undetectable pilot frequency; and continuing to select the non-empty pilot frequency of the next measuring cell list until all the non-empty pilot frequencies in all the cell lists to be measured are completely processed.

Optionally, after the pilot frequencies in the cell list to be measured are processed, the processor is further configured to determine whether a gap request of the pilot frequencies is sent to a network side device, or whether there is no request of the undetectable pilot frequencies, where the gap request includes gaps required by all the pilot frequencies; if not, calculating the measured prs offset meas prs offset of the positioning reference signal of each pilot frequency;

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

Optionally, the determining, by the processor, the cell to be measured under the frequency to be measured includes: judging whether the frequency to be measured is the same frequency, if so, judging whether a PRS occase of the reference Cell under the frequency to be measured is in a silent state at the next time of the frequency to be measured, if not, taking the reference Cell under the frequency to be measured as a Cell to be measured, and sequentially selecting Max Measur cells-1 measurement results from a Cell list under the frequency to be measured according to the priority level of the Cell as the maximum measurement times which are not measured successfully and do not exceed the set value, and taking the Cell which is in the non-silent state at the next time of the PRS occase of the frequency to be measured as the Cell to be measured;

if the frequency is different frequency or the next PRS occase of the reference cell at the frequency to be measured is in a silent state, sequentially selecting Max MeasureCell measurement results which are not successfully measured and do not exceed a set maximum measurement frequency from a cell list under the frequency to be measured according to the priority level of the cell, and taking the cell with the next PRSoccase in a non-silent state as a cell to be measured; the Max measure Cell is the maximum number of measurable cells.

Optionally, the processor is further configured to determine whether a cell to be measured exists under the frequency to be measured; if the frequency exists, determining a cell to be measured under the frequency to be measured, and measuring the determined cell to be measured; otherwise, updating the time position of the next PRS occase of the frequency to be detected as the time position of the next PRS occase of the frequency to be detected;

wherein, the mode that the processor updates the time position of the next PRS occase of the frequency to be measured to be the time position of the next PRS occase of the frequency to be measured is as follows: and adding the time position of the next PRSoccasion of the frequency to be measured and the period of the PRS occase as the time position of the next PRSoccasion of the frequency to be measured.

In the embodiment of the present invention, the UE may be any one of the following, and may be static or mobile, where the static UE may specifically include a terminal (terminal), a mobile station (mobile station), a subscriber unit (subscriber unit), or a station (station), and the mobile UE may specifically include a cellular phone (cellular phone), a Personal Digital Assistant (PDA), a wireless modem (modem), a wireless communication device, a handheld device (handset), a laptop computer (laptop computer), a cordless phone (cordless phone), or a Wireless Local Loop (WLL) station, and the UEs may be distributed in the entire wireless network.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Through the above description of the embodiments, those skilled in the art will clearly understand that the present invention may be implemented by software plus a necessary general hardware platform, and certainly may also be implemented by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which may be stored in a storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments or some parts of the embodiments.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.

Claims

1. A method for determining a measurement cell, comprising:

and determining the cell to be measured under the frequency to be measured.

2. The method of claim 1, wherein determining the list of candidate frequencies to be measured comprises:

or,

calculating the time position of PRS occasting of the pilot frequency;

3. The method of claim 2, wherein after all the inter-frequency frequencies in the measured cell list are processed, the method further comprises:

4. The method of claim 1, wherein the determining the cell to be measured at the frequency to be measured comprises:

if the frequency is different frequency or the next PRS occase of the reference Cell at the frequency to be measured is in a silent state, sequentially selecting Max Measure Cell measurement results which are not successfully measured and do not exceed a set maximum measurement frequency from a Cell list at the frequency to be measured according to the priority level of the Cell, and taking the Cell in the non-silent state at the next PRSoccase at the frequency to be measured as a Cell to be measured;

the Max measure Cell is the maximum number of measurable cells.

5. The method of any of claims 1 to 4, further comprising:

6. The method according to any of claims 1 to 4, wherein if it is determined that there is no cell to be measured at the frequency to be measured, the method further comprises:

and updating the time position of the next PRS occase of the frequency to be measured as the time position of the next PRSoccasion of the frequency to be measured.

7. The method according to claim 6, wherein the updating the time position of the next PRSoccasion of the frequency to be measured to the time position of the next PRS occase of the frequency to be measured is performed by:

8. An apparatus for determining a measurement cell, comprising:

9. The apparatus according to claim 8, wherein the first determining unit comprises: a receiving unit, a dividing unit and a first frequency determining unit; or the receiving unit, the dividing unit, the second selecting unit, the second calculating unit, the first judging unit and the second frequency determining unit; wherein,

the first frequency determining unit is configured to, when a non-empty co-frequency measurement cell list exists in the measurement cell lists divided by the dividing unit, use a co-frequency as a candidate frequency to be measured in a candidate frequency list to be measured;

10. The apparatus of claim 9, further comprising:

11. The apparatus according to claim 8, wherein the second determining unit comprises:

the Max measure Cell is the maximum number of measurable cells.

12. The apparatus of any one of claims 8 to 11, further comprising:

13. The apparatus of any one of claims 8 to 11, further comprising:

and the updating unit is used for updating the time position of the next PRS occase of the frequency to be measured into the time position of the next PRS occase of the frequency to be measured when the second determining unit determines that the cell to be measured does not exist under the frequency to be measured.

14. The apparatus of claim 13, wherein the updating unit updates the time position of the next PRS occase of the frequency to be measured to be the time position of the next PRS occase of the frequency to be measured by: