CN103686992A - Method for measuring signal arrival time and UE - Google Patents
Method for measuring signal arrival time and UE Download PDFInfo
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- CN103686992A CN103686992A CN201210330237.7A CN201210330237A CN103686992A CN 103686992 A CN103686992 A CN 103686992A CN 201210330237 A CN201210330237 A CN 201210330237A CN 103686992 A CN103686992 A CN 103686992A
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Abstract
The embodiment of the invention provides a method for measuring signal arrival time and UE (User Equipment) and relates to the field of communication. According to the invention, a proper amount of data can be acquired, and the complexity in data acquisition control is reduced on the basis that OTDOA (Observed Time Difference of Arrival) measuring performance is satisfied. The method comprises the following steps: acquiring data acquisition parameters and time calculation parameters through calculating or table lookup; configuring the data acquisition parameters and the time calculation parameters; acquiring downstream subframes and special subframes according to the data acquisition parameters; calculating the signal arrival time according to information in the acquired downstream subframes and special subframes as well as the time calculation parameters to acquire the signal arrival time, wherein the data acquisition parameters comprise an initial subframe number of the data acquisition and a total subframe number of the data acquisition; the time calculation parameters comprise a CRS (Cell-specific Reference Signal) initial subframe number on the measuring, data acquisition block number, downstream subframe number in each data acquisition block, and an initial subframe number in each data acquisition block; total subframes comprise the downstream subframes and the special subframes.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of time of arrival (toa) method of measurement and UE.
Background technology
In mobile communication technology, OTDOA (Observed Time Difference of Arrival, the detection arrival time difference) location technology is the technology positioning according to the time difference of community and the propagation of UE (User Equipment, subscriber equipment) signal.He Ge neighbor cell, reference cell is by PRS (Position Reference Signal, location reference signals) add in down link signal to be sent, timing cycle ground sends PRS signal to described UE, and (minimum period is 160ms, maximum cycle is 1280ms), each community sends the PRS signal of several continuous descending sub frames in each cycle.UE carries out related calculation to a plurality of descending PRS signal receiving, and calculates the OTDOA of the PRS signal of each neighbor cell and reference cell, and UE is to network-reporting OTDOA measured value.Network based OTDOA measured value can be determined the position of described UE.If community does not issue PRS, according to the CRS of community (Cell-specific Reference Signal, the specific reference signal in community), carry out the measurement of the time of advent.
Method based on OTDOA location requires to measure time poor that signal that a plurality of communities send simultaneously arrives UE.In prior art, have a kind of signal of measuring community transmission to arrive the method for the time of UE, in the method, described UE gathers the reception signal in a period of time, and uses the data that collect to carry out measurements of arrival time.Image data amount is more, measurement performance is better, but in TDD (Time Division Duplexing, time division duplex) pattern, owing to only gathering downlink data, if data volume collection is too much, need to gather a plurality of data blocks, so just increased the complexity of data acquisition control, increase memory space, if image data amount is very few, there is the measurement performance that can not meet OTDOA.
Summary of the invention
Embodiments of the invention provide a kind of time of arrival (toa) method of measurement and UE, can collect appropriate data, can meet on the basis of OTDOA measurement performance, reduce the complexity of data acquisition control.
For achieving the above object, embodiments of the invention adopt following technical scheme:
On the one hand, disclose a kind of time of arrival (toa) method of measurement, having comprised:
Calculate or table look-up and obtain data acquisition parameters and Time Calculation parameter; Described data acquisition parameters comprises: total number of sub frames of the initial subframe number of data acquisition and data acquisition; Described Time Calculation parameter comprises that the CRS of measurement starts descending sub frame number in subframe numbers, data acquisition blocks number, each data acquisition blocks and the initial subframe number in each data acquisition blocks, and described total subframe comprises descending sub frame and special subframe;
Configure described data acquisition parameters and Time Calculation parameter;
According to described data acquisition parameters, gather descending sub frame and special subframe;
According to the information in the described descending sub frame collecting and special subframe and described Time Calculation parameter, carry out time of arrival (toa) calculating, picked up signal time of advent.
In the possible implementation of the first, for common-frequency time division duplex TDD, described calculating obtains data acquisition parameters and Time Calculation parameter, comprising:
According to TDD up-downgoing proportioning, the initial subframe number that specified data gathers, and start from the initial subframe of described data acquisition data acquisition descending sub frame number and the data acquisition lump number of sub frames that cumulative calculation need to gather, until total number of sub frames that described data acquisition descending sub frame number is more than or equal to default minimum descending sub frame number or described data acquisition is while being more than or equal to the default total number of sub frames of maximum, thereby obtain described data acquisition parameters and Time Calculation parameter.
In the possible implementation of the second, for common-frequency time division duplex TDD, described in table look-up and obtain data acquisition parameters and Time Calculation parameter, comprising:
According to TDD up-downgoing proportioning, search with the frequency proportioning parameter table of comparisons and obtain described data acquisition parameters and Time Calculation parameter; Described is according to default minimum descending sub frame number and the maximum always TDD up-downgoing proportioning that number of sub frames generates and the table of comparisons of described data acquisition parameters and Time Calculation parameter with the frequency proportioning parameter table of comparisons.
In the third possible implementation, for alien frequencies TDD, described calculating obtains data acquisition parameters and Time Calculation parameter, comprising:
Calculating current time starts the start frame of first gap gap and starts subframe numbers;
According to the beginning subframe numbers of TDD up-downgoing proportioning and described gap, obtain described data acquisition parameters and Time Calculation parameter, the initial subframe number of described data acquisition is the subframe numbers of first descending sub frame of continuous descending sub frame in described gap, total number of sub frames of described data acquisition is from described initial subframe, to start up to S subframe or until gap finishes comprised total number of sub frames in described gap, the CRS of described measurement starts the initial subframe number that subframe numbers is described data acquisition, described data acquisition blocks number is 1, descending sub frame number in described data acquisition blocks is from described initial subframe, to start up to S subframe or until gap finishes comprised descending sub frame number in described gap, initial subframe number in described data acquisition blocks is the initial subframe number of described data acquisition,
Described according to described data acquisition parameters collection descending sub frame and special subframe, comprising:
According to the start frame of described gap and beginning subframe numbers, determine that described gap occupies subframe, and occupy in subframe and gather descending sub frame and special subframe according to described data acquisition parameters at described gap.
In the 4th kind of possible implementation, for alien frequencies TDD, for alien frequencies TDD, described in table look-up and obtain data acquisition parameters and Time Calculation parameter, comprising:
According to TDD up-downgoing proportioning, search the alien frequencies proportioning parameter table of comparisons and obtain described data acquisition parameters and Time Calculation parameter; The described alien frequencies proportioning parameter table of comparisons is according to default minimum descending sub frame number and the maximum always TDD up-downgoing proportioning that number of sub frames generates and the table of comparisons of described data acquisition parameters and Time Calculation parameter.
Second aspect, also discloses a kind of UE, comprising:
Obtain unit, for calculating or tabling look-up, obtain data acquisition parameters and Time Calculation parameter; Described data acquisition parameters comprises: total number of sub frames of the initial subframe number of data acquisition and data acquisition; Described Time Calculation parameter comprises that the CRS of measurement starts descending sub frame number in subframe numbers, data acquisition blocks number, each data acquisition blocks and the initial subframe number in each data acquisition blocks, and described total subframe comprises descending sub frame and special subframe;
Dispensing unit, the described data acquisition parameters and the Time Calculation parameter that for configuring described acquisition unit, obtain;
Collecting unit, for gathering descending sub frame and special subframe according to the data acquisition parameters of described dispensing unit configuration;
Computing unit, carries out time of arrival (toa) calculating for the information of the described descending sub frame that collects according to described collecting unit and special subframe and the Time Calculation parameter of described dispensing unit configuration, picked up signal time of advent.
In the possible implementation of the first, for same TDD frequently, described acquisition unit, specifically for according to TDD up-downgoing proportioning, the initial subframe number that specified data gathers, and start from the initial subframe of described data acquisition data acquisition descending sub frame number and the data acquisition lump number of sub frames that cumulative calculation need to gather, until total number of sub frames that described data acquisition descending sub frame number is more than or equal to default minimum descending sub frame number or described data acquisition is while being more than or equal to the default total number of sub frames of maximum, thereby obtain described data acquisition parameters and Time Calculation parameter.
In the possible implementation of the second, for same TDD frequently, described acquisition unit, specifically for according to TDD up-downgoing proportioning, searches with the frequency proportioning parameter table of comparisons and obtains described data acquisition parameters and Time Calculation parameter; Described is according to default minimum descending sub frame number and the maximum always TDD up-downgoing proportioning that number of sub frames generates and the table of comparisons of described data acquisition parameters and Time Calculation parameter with the frequency proportioning parameter table of comparisons.
In the third possible implementation, for alien frequencies TDD, described acquisition unit starts the start frame of first gap and starts subframe numbers for calculating current time, and according to the beginning subframe numbers of TDD up-downgoing proportioning and described gap, obtain described data acquisition parameters and Time Calculation parameter, the initial subframe number of described data acquisition is the subframe numbers of first descending sub frame of continuous descending sub frame in described gap, total number of sub frames of described data acquisition is from described initial subframe, to start up to S subframe or until gap finishes comprised total number of sub frames in described gap, the CRS of described measurement starts the initial subframe number that subframe numbers is described data acquisition, described data acquisition blocks number is 1, descending sub frame number in described data acquisition blocks is from described initial subframe, to start up to S subframe or until gap finishes comprised descending sub frame number in described gap, initial subframe number in described data acquisition blocks is the initial subframe number of described data acquisition,
Described collecting unit, for determining that according to the start frame of described gap and beginning subframe numbers described gap occupies subframe, and occupies in subframe and gathers descending sub frame and special subframe according to described data acquisition parameters at described gap.
In the 4th kind of possible implementation, for alien frequencies TDD, described acquisition unit, specifically for according to TDD up-downgoing proportioning, searches the alien frequencies proportioning parameter table of comparisons and obtains described data acquisition parameters and Time Calculation parameter; The described alien frequencies proportioning parameter table of comparisons is according to default minimum descending sub frame number and the maximum always TDD up-downgoing proportioning that number of sub frames generates and the table of comparisons of described data acquisition parameters and Time Calculation parameter.
The signal that technique scheme provides reaches Time Calculation method and UE, by calculating or table look-up acquisition data acquisition parameters; Then according to described data acquisition parameters, gather descending sub frame and special subframe; Can collect appropriate data like this, can meet on the basis of OTDOA measurement performance, reduce the complexity of data acquisition control.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
A kind of time of arrival (toa) method flow schematic diagram that Fig. 1 provides for embodiment 1;
A kind of Frame arrangement table number schematic diagram that Fig. 2 provides for embodiment 1;
A kind of time of arrival (toa) method flow schematic diagram that Fig. 3 provides for embodiment 2;
The another kind of time of arrival (toa) method flow schematic diagram that Fig. 4 provides for embodiment 2;
A kind of Frame arrangement table number schematic diagram that Fig. 5 provides for embodiment 2;
The structured flowchart of a kind of UE that Fig. 6 provides for embodiment 2.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention provides a kind of time of arrival (toa) method of measurement, as shown in Figure 1, said method comprising the steps of:
101, calculate or table look-up and obtain data acquisition parameters and Time Calculation parameter.
While carrying out OTDOA location in tdd mode, reference cell and each neighbor cell can send CRS signal to UE simultaneously, in the descending sub frame that these CRS signals all receive at described UE, described UE need to gather these descending sub frames, the descending sub frame gathering is more, and the time of arrival (toa) obtaining is just more accurate.If the descending sub frame gathering is too much, need to gather a plurality of data blocks, so just increased the complexity of data acquisition control, if image data amount is very few, the time of arrival (toa) obtaining is inaccurate, just can not meet the measurement performance of OTDOA.UE can meet OTDOA measurement performance shortly not to be made again on the too high basis of the complexity of data acquisition control, by calculating or tabling look-up, obtains data acquisition parameters and Time Calculation parameter; Described data acquisition parameters comprises: total number of sub frames of the initial subframe number of data acquisition and data acquisition; Described Time Calculation parameter comprises that the CRS of measurement starts descending sub frame number in subframe numbers, data acquisition blocks number, each data acquisition blocks and the initial subframe number in each data acquisition blocks, and described total subframe comprises descending sub frame and S subframe.
102, configure described data acquisition parameters and Time Calculation parameter.
UE just can configure described data acquisition parameters and Time Calculation parameter after obtaining described data acquisition parameters and Time Calculation parameter.
103, according to described data acquisition parameters, gather descending sub frame and special subframe.
Dui Yige community, identical when in this community, each frame data up-downgoing is arranged, every frame all comprises 10 subframes, is numbered 0～9.Suppose sub-frame of uplink, descending sub frame and special subframe represent with U, D and S respectively, and in Ze Gai community, the up-downgoing of every frame data is arranged as: DSUUDDSUUD, as shown in Figure 2, the up-downgoing in each frame data of community is arranged all like this.
UE knows the up-downgoing proportioning of this community in advance, therefore described UE can gather transmission of data according to total number of sub frames of the initial subframe number of the data acquisition in described data acquisition parameters and data acquisition, be that the initial subframe number that described UE can data acquisition from certain frame data starts to gather descending sub frame D and special subframe S, until the total number of sub frames gathering reaches total number of sub frames of described data acquisition.
104, according to the described descending sub frame that collects and the information in special subframe S and described Time Calculation parameter, carry out time of arrival (toa) calculating, picked up signal time of advent.
In the described descending sub frame collecting at UE, carry CRS signal, described UE can carry out time of arrival (toa) calculating according to the described Time Calculation parameter of the information in these CRS signals, special subframe S and acquisition, thereby picked up signal time of advent, its computational process is prior art, is not described in detail in this.
The signal that technique scheme provides reaches Time Calculation method, by calculating or table look-up acquisition data acquisition parameters; Then according to described data acquisition parameters, gather descending sub frame and special subframe; Can collect appropriate data like this, can meet on the basis of OTDOA measurement performance, reduce the complexity of data acquisition control.
The embodiment of the present invention provides a kind of time of arrival (toa) method of measurement, and described method is applied to frequency tdd mode, is that UE obtains data acquisition parameters and Time Calculation parameter by calculating, as shown in Figure 3, said method comprising the steps of:
301, according to TDD up-downgoing proportioning, the initial subframe number that specified data gathers.
Because UE stores the TDD up-downgoing proportioning of each frame of community, according to described TDD up-downgoing proportioning, described UE can know the type (sub-frame of uplink, descending sub frame and special subframe) of each subframe in each frame data.Described UE be take any one frame as example, the start frame by this frame as image data, the initial subframe that first descending sub frame in the continuous descending sub frame sequence of first in this frame is data acquisition, the initial subframe number that its frame number is data acquisition.
Suppose that described TDD up-downgoing proportioning is 1, in each frame data of described community, the arrangement of each subframe type is just as shown in Figure 2.Suppose take the start frame that the first frame shown in Fig. 2 is image data, first descending sub frame 4 work song frames in the continuous descending sub frame sequence of first in this frame are just the initial subframe of data acquisition.
Here it should be noted that, 0 work song frame shown in Fig. 2 is an independent subframe, therefore be not that continuous subframes can not be as the initial subframe of data acquisition, continuously arranged if certain descending sub frame does not have, independent descending sub frame also can be used as the initial subframe of data acquisition.
302, from the initial subframe of described data acquisition, start data acquisition descending sub frame number and the data acquisition lump number of sub frames that cumulative calculation need to gather, until total number of sub frames that described data acquisition descending sub frame number is more than or equal to default minimum descending sub frame number or described data acquisition is while being more than or equal to the default total number of sub frames of maximum, thereby obtain described data acquisition parameters and Time Calculation parameter.
After UE has determined the initial subframe number of data acquisition, can start cumulative calculation data acquisition descending sub frame number and data acquisition lump number of sub frames from the initial subframe of described data acquisition, until described data acquisition descending sub frame number is more than or equal to default minimum descending sub frame number, or total number of sub frames of described data acquisition stops while being more than or equal to the default total number of sub frames of maximum.Now, just can obtain data acquisition descending sub frame number and the data acquisition lump number of sub frames of cumulative calculation; The CRS that simultaneously also can obtain measurement starts descending sub frame number in subframe numbers, data acquisition blocks number, each data acquisition blocks and the initial subframe number in each data acquisition blocks, the CRS of wherein said measurement starts the initial subframe number that subframe numbers is exactly data acquisition, the number that described data acquisition blocks number is continuous descending sub frame, the initial subframe number in each data acquisition blocks is first descending sub frame number in described data acquisition blocks.
Still, Figure 2 shows that example, suppose that default minimum descending sub frame number is 6, maximum total number of sub frames is 10.Described UE is since 4 work song frame cumulative calculation data acquisition descending sub frame number and data acquisition lump number of sub frames, in cumulative calculation 4,5,6 work song frames, descending sub frame number is 2, total number of sub frames is 3, continues cumulative calculation 9,0,1 work song frame, and so far descending sub frame number is 4, total number of sub frames is 6, continue 4,5,6 work song frames in cumulative calculation next frame, so far descending sub frame number is 6, and total number of sub frames is 9, the minimum descending sub frame number 6 that described data acquisition descending sub frame number 6 equals to preset, stops accumulative total.As shown in Figure 2, we can obtain the initial subframe number of data acquisition: 4 and total number of sub frames of data acquisition: 9; And the CRS of the measurement in described Time Calculation parameter starts subframe numbers: 4, and data acquisition blocks number: 3, the descending sub frame number in each data acquisition blocks: the initial subframe number in (2,2,2) and each data acquisition blocks (4,9,4).
Optionally, described UE can also table look-up and obtain described data acquisition parameters and Time Calculation parameter.
Described UE, according to TDD up-downgoing proportioning, searches with the frequency proportioning parameter table of comparisons and obtains described data acquisition parameters and Time Calculation parameter.
Described is according to default minimum descending sub frame number and the maximum always TDD up-downgoing proportioning that number of sub frames generates and the table of comparisons of described data acquisition parameters and Time Calculation parameter with the frequency proportioning parameter table of comparisons.Suppose described default minimum descending sub frame number be 6 and maximum total number of sub frames be 10, as shown in table 1 according to the same frequency proportioning parameter table of comparisons of step 301 and the 302 TDD up-downgoing proportionings that generate according to default minimum descending sub frame number and maximum total number of sub frames and described data acquisition parameters and Time Calculation parameter:
Table 1
When described TDD up-downgoing proportioning is 1, by tabling look-up, 1 also can obtain the initial subframe number of data acquisition: 4 and total number of sub frames of data acquisition: 9; And the CRS of the measurement in described Time Calculation parameter starts subframe numbers: 4, and data acquisition blocks number: 3, the descending sub frame number in each data acquisition blocks: the initial subframe number in (2,2,2) and each data acquisition blocks (4,9,4).
303, configure described data acquisition parameters and Time Calculation parameter.
After UE calculating or the table look-up described data acquisition parameters of acquisition and Time Calculation parameter, just can configure described data acquisition parameters and Time Calculation parameter.Optionally, described UE can be in data acquisition parameters and Time Calculation parameter described in the last sub-frame configuration of the initial subframe of described data acquisition.As shown in Figure 2, described UE can configure described data acquisition parameters and Time Calculation parameter when 3 work song frame of described the first frame data.
304, according to described data acquisition parameters, gather descending sub frame and special subframe.
Described UE can carry out data acquisition according to total number of sub frames of the initial subframe number of data acquisition and data acquisition, still Figure 2 shows that example, described UE can gather descending sub frame and special subframe since No. 4 frames, until the total number of sub frames collecting is 9, described UE just can collect the image data shown in Fig. 2.
Optionally, this next frame constantly that described UE can carry out that step 301 and 302 obtains data acquisition parameters and Time Calculation parameter starts to gather descending sub frame and special subframe according to described data acquisition parameters.
305, according to the described descending sub frame that collects and the information in special subframe and described Time Calculation parameter, carry out time of arrival (toa) calculating, picked up signal time of advent.
In the described descending sub frame collecting at UE, carry CRS signal, described UE can carry out time of arrival (toa) calculating according to the described Time Calculation parameter of the information in these CRS signals and special subframe S and acquisition, thus picked up signal time of advent.
The embodiment of the present invention provides a kind of time of arrival (toa) method of measurement, and described method is applied to alien frequencies tdd mode, as shown in Figure 4, said method comprising the steps of:
401, the start frame of calculated gap gap and beginning subframe numbers.
According to current time and gap configuration, calculate the frame number n of gap start frame
f, start, interTDDwith beginning subframe numbers n
sf, start, interTDD, be the position of next gap.The beginning frame number of gap is:
Wherein, n
f, currentthe frame that represents current time place, n
sf, currentthe subframe that represents current time place, n
sf, syncrepresent lock in time; T
gap, periodin the cycle that represents gap, the gap cycle of LTE agreement regulation is 40ms or 80ms at present; T
gap, offsetrepresent gap skew, when the gap cycle is 40ms, T
gap, offsetit is 0～39 integer; When the gap cycle is 80ms, T
gap, offsetit is 0～79 integer.
402,, according to the beginning subframe numbers of TDD up-downgoing proportioning and described gap, obtain described data acquisition parameters and Time Calculation parameter.
The initial subframe number of described data acquisition is the subframe numbers of first descending sub frame of continuous descending sub frame in described gap, total number of sub frames of described data acquisition is from described initial subframe, to start up to S subframe or until gap finishes comprised total number of sub frames in described gap, the CRS of described measurement starts the initial subframe number that subframe numbers is described data acquisition, described data acquisition blocks number is 1, descending sub frame number in described data acquisition blocks is from described initial subframe, to start up to S subframe or until gap finishes comprised descending sub frame number in described gap, initial subframe number in described data acquisition blocks is the initial subframe number of described data acquisition.
As shown in Figure 5, take up-downgoing proportioning as 1, T
gap, offsetbe 3 for example, by step 401, calculating gap, to start subframe numbers be 3, the length of a gap of agreement regulation is fixed as 6 subframes, therefore described gap is at 3 work song frame to 8 frames of the beginning frame number calculating, therefore according to up-downgoing proportioning, first descending sub frame that the initial subframe of described data acquisition is continuous descending sub frame i.e. 4 work song frames, total number of sub frames of described data acquisition is 3, it is 4 that the CRS of described measurement starts subframe numbers, described data acquisition blocks number is 1, descending sub frame number in described data acquisition blocks is 2, initial subframe number in described data acquisition blocks is 4.
Optionally, described UE also can search the alien frequencies proportioning parameter table of comparisons according to TDD up-downgoing proportioning and gap configuration and obtain described data acquisition parameters and Time Calculation parameter, the initial subframe number of data acquisition when table 2 as follows is different proportionings and gap configuration, the descending sub frame number of data acquisition when table 3 is different proportionings and gap configuration.Therefore table look-up, 2 can to obtain TDD up-downgoing proportioning be 1, the beginning subframe numbers of gap is that the initial subframe of the data acquisition of 3 o'clock is 4 work song frames, tabling look-up 3, can to obtain TDD up-downgoing proportioning be 1, the beginning subframe numbers of gap is that the descending sub frame number in the data acquisition blocks of 3 o'clock is 2, tabling look-up 4, can to obtain beginning subframe numbers that TDD up-downgoing proportioning is 1, gap be that total number of sub frames of the data acquisition blocks of 3 o'clock is 3.
Table 2
Table 3
Table 4
403, configure described data acquisition parameters and Time Calculation parameter.
Described UE, after obtaining described data acquisition parameters and Time Calculation parameter, can configure described data acquisition parameters and Time Calculation parameter; Data acquisition parameters and Time Calculation parameter described in the last sub-frame configuration of the initial subframe of the described data acquisition that optionally, described UE can be in the start frame of described gap.
404, according to described data acquisition parameters, gather descending sub frame and special subframe.
Described UE can gather according to described data acquisition parameters descending sub frame and special subframe in described gap.The initial subframe of supposing data acquisition in the data acquisition parameters of described UE configuration is 4 work song frames, and the descending sub frame number in described data acquisition blocks is 2, and total number of sub frames is 3, and described UE will gather No. 4, No. 5 and 6 work song frames in current time next frame.
405, according to the described descending sub frame that collects and the information in special subframe and described Time Calculation parameter, carry out time of arrival (toa) calculating, picked up signal time of advent.
In the described descending sub frame collecting at UE, carry CRS signal, described UE can be according to these CRS signals, and the described Time Calculation parameter of the information in special subframe and acquisition is carried out time of arrival (toa) calculating, thus picked up signal time of advent.
The embodiment of the present invention also provides a kind of UE, and as shown in Figure 6, described device comprises: obtain unit 601, dispensing unit 602, collecting unit 603, computing unit 604.
Obtain unit 601, for calculating or tabling look-up, obtain data acquisition parameters and Time Calculation parameter; Described data acquisition parameters comprises: total number of sub frames of the initial subframe number of data acquisition and data acquisition; Described Time Calculation parameter comprises that the CRS of measurement starts descending sub frame number in subframe numbers, data acquisition blocks number, each data acquisition blocks and the initial subframe number in each data acquisition blocks, and described total subframe comprises descending sub frame and special subframe.
Dispensing unit 602, the described data acquisition parameters and the Time Calculation parameter that for configuring described acquisition unit 601, obtain.
Collecting unit 603, for gathering descending sub frame and special subframe according to the data acquisition parameters of described dispensing unit 602 configurations.
Computing unit 604, carries out time of arrival (toa) calculating for the information of the described descending sub frame that collects according to described collecting unit 603 and special subframe and the Time Calculation parameter of described dispensing unit configuration, picked up signal time of advent.
For same TDD frequently, described acquisition unit 601, specifically for according to TDD up-downgoing proportioning, the initial subframe number that specified data gathers, and start from the initial subframe of described data acquisition data acquisition descending sub frame number and the data acquisition lump number of sub frames that cumulative calculation need to gather, until total number of sub frames that described data acquisition descending sub frame number is more than or equal to default minimum descending sub frame number or described data acquisition is while being more than or equal to the default total number of sub frames of maximum, thereby obtain described data acquisition parameters and Time Calculation parameter.Optionally, described acquisition unit 601 also can, specifically for according to TDD up-downgoing proportioning, be searched with the frequency proportioning parameter table of comparisons and be obtained described data acquisition parameters and Time Calculation parameter; Described is according to default minimum descending sub frame number and the maximum always TDD up-downgoing proportioning that number of sub frames generates and the table of comparisons of described data acquisition parameters and Time Calculation parameter with the frequency proportioning parameter table of comparisons.Optionally, described dispensing unit 602 is for data acquisition parameters and Time Calculation parameter described in the last sub-frame configuration of the initial subframe of the data acquisition at described next frame.Described collecting unit 603 also gathers descending sub frame and special subframe for next subframe in the moment in described acquisition data acquisition parameters according to described data acquisition parameters.
For alien frequencies TDD, described acquisition unit 601 is for calculating the start frame of gap and starting subframe numbers, and according to the beginning subframe numbers of TDD up-downgoing proportioning and described gap, obtain described data acquisition parameters and Time Calculation parameter, the initial subframe number of described data acquisition is the subframe numbers of first descending sub frame of continuous descending sub frame in described gap, total number of sub frames of described data acquisition is from described initial subframe, to start up to S subframe or until gap finishes comprised total number of sub frames in described gap, the CRS of described measurement starts the initial subframe number that subframe numbers is described data acquisition, described data acquisition blocks number is 1, descending sub frame number in described data acquisition blocks is from described initial subframe, to start up to S subframe or until gap finishes comprised descending sub frame number in described gap, initial subframe number in described data acquisition blocks is the initial subframe number of described data acquisition.Optionally, described acquisition unit 601, specifically for according to TDD up-downgoing proportioning, searches the alien frequencies proportioning parameter table of comparisons and obtains described data acquisition parameters and Time Calculation parameter; The described alien frequencies proportioning parameter table of comparisons is according to default minimum descending sub frame number and the maximum always TDD up-downgoing proportioning that number of sub frames generates and the table of comparisons of described data acquisition parameters and Time Calculation parameter.Described dispensing unit 602 is for data acquisition parameters and Time Calculation parameter described in the last sub-frame configuration of the initial subframe of the described data acquisition of the start frame at described gap.Described collecting unit 603, for determining that according to the start frame of described gap and beginning subframe numbers described gap occupies subframe, and occupies in subframe and gathers descending sub frame and special subframe according to described data acquisition parameters at described gap.
The signal that technique scheme provides reaches Time Calculation method and UE, by calculating or table look-up acquisition data acquisition parameters; Then according to described data acquisition parameters, gather descending sub frame and special subframe; Can collect appropriate data like this, can meet on the basis of OTDOA measurement performance, reduce the complexity of data acquisition control.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can complete by the relevant hardware of program command, aforesaid program can be stored in a computer read/write memory medium, this program, when carrying out, is carried out the step that comprises said method embodiment; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CDs.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of described claim.
Claims (16)
1. a time of arrival (toa) method of measurement, is characterized in that, comprising:
Calculate or table look-up and obtain data acquisition parameters and Time Calculation parameter; Described data acquisition parameters comprises: total number of sub frames of the initial subframe number of data acquisition and data acquisition; Described Time Calculation parameter comprises that the CRS of measurement starts descending sub frame number in subframe numbers, data acquisition blocks number, each data acquisition blocks and the initial subframe number in each data acquisition blocks, and described total subframe comprises descending sub frame and special subframe;
Configure described data acquisition parameters and Time Calculation parameter;
According to described data acquisition parameters, gather descending sub frame and special subframe;
According to the information in the described descending sub frame collecting and special subframe and described Time Calculation parameter, carry out time of arrival (toa) calculating, picked up signal time of advent.
2. method according to claim 1, is characterized in that, for common-frequency time division duplex TDD, described calculating obtains data acquisition parameters and Time Calculation parameter, comprising:
According to TDD up-downgoing proportioning, the initial subframe number that specified data gathers, and start from the initial subframe of described data acquisition data acquisition descending sub frame number and the data acquisition lump number of sub frames that cumulative calculation need to gather, until total number of sub frames that described data acquisition descending sub frame number is more than or equal to default minimum descending sub frame number or described data acquisition is while being more than or equal to the default total number of sub frames of maximum, thereby obtain described data acquisition parameters and Time Calculation parameter.
3. method according to claim 1, is characterized in that, for common-frequency time division duplex TDD, described in table look-up and obtain data acquisition parameters and Time Calculation parameter, comprising:
According to TDD up-downgoing proportioning, search with the frequency proportioning parameter table of comparisons and obtain described data acquisition parameters and Time Calculation parameter; Described is according to default minimum descending sub frame number and the maximum always TDD up-downgoing proportioning that number of sub frames generates and the table of comparisons of described data acquisition parameters and Time Calculation parameter with the frequency proportioning parameter table of comparisons.
4. according to the method in claim 2 or 3, it is characterized in that, in data acquisition parameters and Time Calculation parameter described in the last sub-frame configuration of the initial subframe of described data acquisition.
5. according to the method described in claim 2～4 any one, it is characterized in that, the next frame in moment of described acquisition data acquisition parameters and Time Calculation parameter gathers descending sub frame and special subframe according to described data acquisition parameters.
6. method according to claim 1, is characterized in that, for alien frequencies TDD, described calculating obtains data acquisition parameters and Time Calculation parameter, comprising:
Calculating current time starts the start frame of first gap gap and starts subframe numbers;
According to the beginning subframe numbers of TDD up-downgoing proportioning and described gap, obtain described data acquisition parameters and Time Calculation parameter, the initial subframe number of described data acquisition is the subframe numbers of first descending sub frame of continuous descending sub frame in described gap, total number of sub frames of described data acquisition is from described initial subframe, to start up to S subframe or until gap finishes comprised total number of sub frames in described gap, the CRS of described measurement starts the initial subframe number that subframe numbers is described data acquisition, described data acquisition blocks number is 1, descending sub frame number in described data acquisition blocks is from described initial subframe, to start up to S subframe or until gap finishes comprised descending sub frame number in described gap, initial subframe number in described data acquisition blocks is the initial subframe number of described data acquisition,
Described according to described data acquisition parameters collection descending sub frame and special subframe, comprising:
According to the start frame of described gap and beginning subframe numbers, determine that described gap occupies subframe, and occupy in subframe and gather descending sub frame and special subframe according to described data acquisition parameters at described gap.
7. method according to claim 1, is characterized in that, for alien frequencies TDD, described in table look-up and obtain data acquisition parameters and Time Calculation parameter, comprising:
According to TDD up-downgoing proportioning, search the alien frequencies proportioning parameter table of comparisons and obtain described data acquisition parameters and Time Calculation parameter; The described alien frequencies proportioning parameter table of comparisons is according to default minimum descending sub frame number and the maximum always TDD up-downgoing proportioning that number of sub frames generates and the table of comparisons of described data acquisition parameters and Time Calculation parameter.
8. according to the method described in claim 6 or 7, it is characterized in that, in data acquisition parameters and Time Calculation parameter described in the last sub-frame configuration of the beginning subframe of the start frame of described gap.
9. a UE, is characterized in that, comprising:
Obtain unit, for calculating or tabling look-up, obtain data acquisition parameters and Time Calculation parameter; Described data acquisition parameters comprises: total number of sub frames of the initial subframe number of data acquisition and data acquisition; Described Time Calculation parameter comprises that the CRS of measurement starts descending sub frame number in subframe numbers, data acquisition blocks number, each data acquisition blocks and the initial subframe number in each data acquisition blocks, and described total subframe comprises descending sub frame and special subframe;
Dispensing unit, the described data acquisition parameters and the Time Calculation parameter that for configuring described acquisition unit, obtain;
Collecting unit, for gathering descending sub frame and special subframe according to the data acquisition parameters of described dispensing unit configuration;
Computing unit, carries out time of arrival (toa) calculating for the information of the described descending sub frame that collects according to described collecting unit and special subframe and the Time Calculation parameter of described dispensing unit configuration, picked up signal time of advent.
10. UE according to claim 9, it is characterized in that, for same TDD frequently, described acquisition unit, specifically for according to TDD up-downgoing proportioning, the initial subframe number that specified data gathers, and start from the initial subframe of described data acquisition data acquisition descending sub frame number and the data acquisition lump number of sub frames that cumulative calculation need to gather, until total number of sub frames that described data acquisition descending sub frame number is more than or equal to default minimum descending sub frame number or described data acquisition is while being more than or equal to the default total number of sub frames of maximum, thereby obtain described data acquisition parameters and Time Calculation parameter.
11. UE according to claim 9, is characterized in that, for TDD frequently, described acquisition unit, specifically for according to TDD up-downgoing proportioning, searches with the proportioning parameter table of comparisons frequently and obtain described data acquisition parameters and Time Calculation parameter; Described is according to default minimum descending sub frame number and the maximum always TDD up-downgoing proportioning that number of sub frames generates and the table of comparisons of described data acquisition parameters and Time Calculation parameter with the frequency proportioning parameter table of comparisons.
12. according to the UE described in claim 10 or 11, it is characterized in that, described dispensing unit is for data acquisition parameters and Time Calculation parameter described in the last sub-frame configuration of the initial subframe in described data acquisition.
13. according to the UE described in claim 10～12 any one, and described collecting unit gathers descending sub frame and special subframe for the next frame in the moment in described acquisition data acquisition parameters and Time Calculation parameter according to described data acquisition parameters.
14. UE according to claim 9, is characterized in that, for alien frequencies TDD, described acquisition unit starts the start frame of first gap and starts subframe numbers for calculating current time, and according to the beginning subframe numbers of TDD up-downgoing proportioning and described gap, obtain described data acquisition parameters and Time Calculation parameter, the initial subframe number of described data acquisition is the subframe numbers of first descending sub frame of continuous descending sub frame in described gap, total number of sub frames of described data acquisition is from described initial subframe, to start up to S subframe or until gap finishes comprised total number of sub frames in described gap, the CRS of described measurement starts the initial subframe number that subframe numbers is described data acquisition, described data acquisition blocks number is 1, descending sub frame number in described data acquisition blocks is from described initial subframe, to start up to S subframe or until gap finishes comprised descending sub frame number in described gap, initial subframe number in described data acquisition blocks is the initial subframe number of described data acquisition,
Described collecting unit, for determining that according to the start frame of described gap and beginning subframe numbers described gap occupies subframe, and occupies in subframe and gathers descending sub frame and special subframe according to described data acquisition parameters at described gap.
15. UE according to claim 9, is characterized in that, for alien frequencies TDD, described acquisition unit, specifically for according to TDD up-downgoing proportioning, searches the alien frequencies proportioning parameter table of comparisons and obtain described data acquisition parameters and Time Calculation parameter; The described alien frequencies proportioning parameter table of comparisons is according to default minimum descending sub frame number and the maximum always TDD up-downgoing proportioning that number of sub frames generates and the table of comparisons of described data acquisition parameters and Time Calculation parameter.
16. according to the UE described in claims 14 or 15, it is characterized in that, described dispensing unit is for data acquisition parameters and Time Calculation parameter described in the last sub-frame configuration of the beginning subframe of the start frame at described gap.
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