CN102137484B - Method and device for measuring RSCP (received signal code power) of adjacent cells - Google Patents
Method and device for measuring RSCP (received signal code power) of adjacent cells Download PDFInfo
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Abstract
The embodiment of the invention provides a method and device for measuring RSCP (received signal code power) of adjacent cells, and the method and device provided by the invention are applicable to UE (user equipment). The method comprises the following steps: acquiring the timing information of each adjacent cell of the current service cell; partitioning a synchronous cell group based on the timing information of each adjacent cell and the RSCP value of each adjacent cell, and obtaining the timing information of the synchronous cell group; acquiring corresponding midamble code data based on the timing information of the synchronous cell group; performing parallel interference cancellation on multiple adjacent cells in one synchronous cell group, and acquiring the channel estimation values of the multiple adjacent cells in the synchronous cell group; and calculating the RSCP value based on the channel estimation values. By utilizing the method and device provided by the invention, the accuracy of channel estimation is improved so as to enhance the accuracy of the RSCP measurement values of the adjacent cells.
Description
Technical field
The present invention relates to wireless communication field, particularly relate to method of measurement and the device of adjacent cell received signal code power.
Background technology
In mobile communication system, user terminal (UE) can be in certain Serving cell, when certain neighbor cell communication quality, higher than during current service cell, (such as user is moved and causes region residing for user terminal to change, such as user terminal (UE) and current serving cell site are built communication quality and are become severe, change at such as current radio environment), user terminal (UE) will trigger cell reselection.Wherein, P-CCPCH (Primary Common Control Physical Channel is carried out to adjacent cell, Primary Common Control Physical Channel) measure be the main standard that community carries out selecting, one of them important indicator is exactly the RSCP (Received Signal Code Power, received signal code power) of TS0 time slot (descending public time slot).So, how accurately must obtain P-CCPCH RSCP value, make communication quality reach more excellent, become the key that community is selected.
For TD-SCDMA system, existing great majority are about the RSCP method of measurement of adjacent cell P-CCPCH, namely midamble (midamble) code data is obtained, according to the basic midamble code of each adjacent cell and the timing information (TS0 time slot) of current service cell, obtain the channel estimation value of adjacent cell, thus try to achieve the RSCP value of the P-CCPCH of Target cell.Key step as shown in Figure 1.
1) UE and current service cell carry out synchronous after, regularly receive the broadcast that this Serving cell issues, comprise the id information of each adjacent cell of this Serving cell in broadcast, the basic Midamble code of this adjacent cell can be known according to the id information of adjacent cell.
2) because being synchronous between current service cell and its each adjacent cell, different from UE standoff distance again, so each community TS0 time slot arrives the time point of UE namely can there is deviation, the TS0 data that aliasing UE being put at one time receive each community to send.The TS0Midamble code received is asked channel impulse response with the basic Midamble code of each adjacent cell by UE respectively, namely carries out channel estimating to each adjacent cell.
3) channel impulse response is asked to the P-CCPCH RSCP value of each adjacent cell.
In order to improve measurement accuracy, in above-mentioned steps 3) before, Denoising Algorithm generally can be adopted to carry out denoising to the channel impulse response of each adjacent cell, the accuracy of the channel estimating (i.e. channel impulse response) obtained like this can increase, then in step 3) in use denoising after channel impulse response ask the P-CCPCH RSCP value of each adjacent cell.
But the mode of carrying out denoising to single subdistrict cannot eliminate the strong jamming of neighbor cell, and AF panel and equilibrium are the emphasis of channel estimating.
Summary of the invention
In order to improve the accuracy that RSCP measures, the embodiment of the present invention provides a kind of method of measurement of adjacent cell received signal code power (RSCP), and be applicable to user equipment (UE), described method of measurement comprises:
Obtain each adjacent cell timing information of current service cell;
According to each adjacent cell RSCP value that each adjacent cell timing information and last time obtain, carry out the division of synchronized cells group, and obtain the timing information of synchronized cells group;
Timing information according to described synchronized cells group obtains corresponding midamble code data;
In a synchronized cells group, Parallel Interference Cancellation process is carried out to multiple adjacent cell, and obtain the channel estimation value of multiple adjacent cell in the group of described synchronized cells;
RSCP value is tried to achieve according to described channel estimation value.
Further, in the described each adjacent cell RSCP value obtained according to each adjacent cell timing information and last time, carry out the division of synchronized cells group, and obtain in the timing information of synchronized cells group:
Each adjacent cell only belongs to a synchronized cells group;
The timing information of all adjacent cells in a synchronized cells group, and the difference between the timing information of the adjacent cell as benchmark community in the group of described synchronized cells is in preset range;
With the timing information of an adjacent cell in the group of described synchronized cells, as the timing information of synchronized cells group.
Further, the described adjacent cell as timing information benchmark, for unallocated in the adjacent cell of synchronized cells group, the adjacent cell that RSCP is the strongest;
With the timing information of an adjacent cell in the group of described synchronized cells, the timing information as synchronized cells group is specially: with the timing information of the strongest adjacent cell of RSCP in the group of described synchronized cells, as the timing information of synchronized cells group.
More excellent, described try to achieve RSCP value according to described channel estimation value after, described method of measurement comprises further:
This all obtains RSCP value to judge whether all communities in the group of described synchronized cells, as the adjacent cell still having this not obtain RSCP value, return described in a synchronized cells group, Parallel Interference Cancellation process is carried out to multiple adjacent cell, and obtains the step of the channel estimation value of multiple adjacent cell in the group of described synchronized cells;
If all communities in the group of described synchronized cells this all obtain RSCP value, judge whether this RSCP measurement of all synchronized cells group, as the cell set still having this to measure without RSCP, select the described cell set measured without RSCP, return the step that the described timing information according to described synchronized cells group obtains corresponding midamble code data.
More excellent on the basis of the above, described in return in a synchronized cells group, Parallel Interference Cancellation process is carried out to multiple adjacent cell, and the step obtaining the channel estimation value of multiple adjacent cell in the group of described synchronized cells is specially:
In the group of described synchronized cells in this acquired RSCP value, by the strong adjacent cell to weak selection some, this does not obtain the adjacent cell of RSCP value with in the group of described synchronized cells, together carries out Parallel Interference Cancellation process, and obtains corresponding channel estimation value.
The embodiment of the present invention provides the measurement mechanism of a kind of adjacent cell received signal code power RSCP simultaneously, comprises:
Main control unit, for starting the measurement of adjacent cell RSCP, producing control signal, comprising the enabling signal to data buffer storage unit transmitting and receiving data, the enabling signal of cell group is sent to pretreatment unit, and the enabling signal of the Signal estimation sent to arithmetic element;
Described pretreatment unit, for receiving the timing information of adjacent cell, according to adjacent cell timing information, and the adjacent cell RSCP value that last time obtains, carry out the division of synchronized cells group, and obtain the timing information of synchronized cells group;
Described data buffer storage unit, to go forward side by side row cache for receiving midamble data, and according to synchronized cells group timing information, selects corresponding midamble code information to export;
Described arithmetic element, for the midamble code information exported according to described data buffer storage unit, carries out channel estimating based on multiple cell Parallel Interference Cancellation, obtains channel estimation value;
Post-processing unit, calculates RSCP value for the channel estimation value obtained arithmetic element.
Further, described pretreatment unit carries out being divided into of synchronized cells group: each adjacent cell only belongs to a synchronized cells group;
The timing information of all adjacent cells in a synchronized cells group, and the difference between the timing information of the adjacent cell as benchmark community in the group of described synchronized cells is in preset range;
The timing information that described pretreatment unit obtains synchronized cells group is: with the timing information of an adjacent cell in the group of described synchronized cells, as the timing information of synchronized cells group.
Further, the described adjacent cell as timing information benchmark, for unallocated in the adjacent cell of synchronized cells group, the adjacent cell that RSCP is the strongest;
The timing information that described pretreatment unit obtains synchronized cells group is specially: with the timing information of the strongest adjacent cell of RSCP in the group of described synchronized cells, as the timing information of synchronized cells group.
Further, described main control unit comprises further: the first judge module, and for judging whether all communities in the group of described synchronized cells, this all obtains RSCP value, as the adjacent cell still having this not obtain RSCP value, then notifies described arithmetic element; And
Second judge module, for judging whether this RSCP measurement of all synchronized cells group, as the cell set still having this to measure without RSCP, selecting the described cell set measured without RSCP, and notifying described data buffer storage unit.
On the basis of the above further, described post-processing unit, is further used for, and to this acquired adjacent cell RSCP in the group of described synchronized cells by strong and weak arrangement, and will put in order and notifies described main control unit; Described first judge module notifies that described arithmetic element is, by the strong adjacent cell to weak selection some, described arithmetic element is notified together with the adjacent cell that this in the group of described synchronized cells does not obtain RSCP, make described arithmetic element not obtain the adjacent cell of RSCP to the adjacent cell of described selection and described this, do multiple cell Parallel Interference Cancellation and channel estimating.
The embodiment of the present invention is by being divided into synchronized cells group to adjacent cell, same TS0 is used in each cell set, in group, parallel noise reduction process is carried out to multiple community, improve the accuracy of channel estimating, thus improve the accuracy of adjacent cell PCCPCH RSCP measured value.
Accompanying drawing explanation
Fig. 1 is the method for measurement block diagram of prior art to PCCPCH RSCP;
Fig. 2 is the schematic diagram of the execution mode that the present invention one adjacent cell RSCP measures;
Fig. 3 is the flow chart that the present invention one adjacent cell RSCP measures embodiment;
Fig. 4 is the block diagram of the present invention one adjacent cell RSCP measurement mechanism embodiment;
Fig. 5 is the schematic diagram of the present invention one adjacent cell RSCP measurement mechanism embodiment.
Embodiment
In order to make the object of the embodiment of the present invention, technical scheme and advantage clearly understand, below in conjunction with embodiment and accompanying drawing, the embodiment of the present invention is described in detail.At this, illustrative examples of the present invention and illustrating for explaining the present invention, but not as a limitation of the invention.
The invention provides the execution mode that a kind of adjacent cell PCCPCH RSCP (hereinafter referred to as RSCP) is measured, as shown in Figure 2, comprise step below:
First, each adjacent cell timing information of current service cell is obtained;
Each adjacent cell is divided, obtains synchronized cells group;
Timing information according to synchronized cells group obtains corresponding midamble code data;
In a synchronized cells group, Parallel Interference Cancellation process is carried out to many adjacent cells, and obtain the channel estimation value of these adjacent cells;
RSCP value is obtained according to the channel estimation value of adjacent cell.
Below in conjunction with specific embodiment, above-mentioned execution mode is described in detail.
The embodiment of a RSCP method of measurement provided by the invention comprises the steps:
Step one, obtains each adjacent cell timing information of current service cell.
UE obtains the positional information of each adjacent cell descending pilot frequency time slot (DwPTS), thus pushes away to obtain the timing information of each adjacent cell.Its concrete steps comprise:
1) receive the broadcast that current service cell issues, obtain the id information of current service cell, according to No. ID, community, obtain the downlink frequency pilot code (SYNC_DL) of this adjacent cell.
2) the DwPTS data that the SYNC_DL of each adjacent cell receives with current service cell are respectively carried out multiple correlation, obtain the peak value of each adjacent cell, the location point residing for this peak value is the position of each adjacent cell DwPTS.
3) UE is according to the position of each community DwPTS, converses the position of the TS0 time slot of each community, i.e. timing information.
Step 2, divides each adjacent cell, obtains synchronized cells group.
Divide each adjacent cell according to certain decision rule, the cell block of division is called synchronized cells group.Each synchronized cells group adopts same TS0 timing information.
Concrete decision rule can be:
First in these adjacent cells, select the adjacent cell that a received signal code power (RSCP) is the strongest, using the timing information of this community as benchmark, this adjacent cell is benchmark adjacent cell, the timing information of other adjacent cell is compared with it, timing information is made to be in certain limit around benchmark, such as timing information shifts to an earlier date 5chip or delayed 11chip than benchmark, and (chip is time span unit, such as DwPTS time slot is 96chip) within adjacent cell, the community basic synchronization the strongest with power can be regarded as, so a composition synchronized cells group.Above-mentioned in advance and the value of delayed several chip be the comparatively figure of merit, specifically for different hardware devices and different expanded window length, different community ranges of choice can be set.
Above-mentioned decision rule is more excellent scheme, also can be otherwise, TS0 is comparatively divided into groups close to the adjacent cell of (being also basic synchronization), such as select the adjacent cell that RSCP is the most weak, using its timing information as benchmark, make composition adjacent cell synchronized cells group of certain limit around benchmark.
After forming a synchronized cells group, a community that received signal code power is the strongest is selected from remaining adjacent cell, a new synchronized cells group is set up by principle above, get rid of outside this cell set, still proceed community screening according to principle above and divide, until all adjacent cells are all divided complete.
Adjacent cell in the group of each synchronized cells adopts identical timing information, and adopts the TS0 timing information in this synchronized cells group corresponding to received signal code power (RSCP) Qiang community.Select RSCP Qiang community to be more excellent scheme herein, RSCP strong community such as also can be selected as the TS0 timing information of synchronized cells group.It should be noted that, after determining benchmark adjacent cell, can namely determine that the timing information of this benchmark adjacent cell is the timing information of this synchronized cells group, also after the division completing this cell set, then the timing information of this group can be determined.Below in a kind of situation, the timing information of benchmark adjacent cell is only done microzonation timesharing and is used, and must not become the timing information of this cell set.
In this step, if not carrying out community selection (such as network side first time issues cell information) first, the RSCP of each community has obtained and has existed with the form of wattmeter in upper once RSCP measures, new wattmeter can be formed after this carries out adjacent cell RSCP measurement, and by community next time select use.If community is selected first, (each cell number is 0 can to give tacit consent to the 0th when dividing first to organize, 1,2,3...... can certainly be defaulted as other) timing information of community is benchmark, the cell timing information that when dividing second to organize, remaining sequence number is the most front is benchmark, carries out the division of synchronized cells group, the like.
Step 3, according to the TS0 timing information of this synchronized cells group, the relevant position of the midamble code finding this TS0 corresponding, obtains corresponding midamble code data from the buffer area receiving data.Receive midamble code and also put into the step receiving data buffer area, can with above-mentioned steps two parallel processing, there is not an inevitable sequencing in other words, as long as namely step 3 is made when both all completes.
Step 4, carries out channel estimating to multiple communities of same cell set simultaneously, by Parallel Interference Cancellation process, obtains the channel estimation value of these communities.The method of Parallel Interference Cancellation utilizes the community of the same TS0 timing information of multiple use, can better eliminate the interference between community, and the channel impulse response obtained by this kind of mode estimates that the accuracy of (i.e. channel estimating) value can improve greatly.More excellent mode does the Parallel Interference Cancellation process of iteration.Special circumstances may occur only comprising a community in a cell set, though now cannot make Parallel Interference Cancellation, but still eliminate part interference by noise reduction mode.
Step 5, according to the channel estimation value of each community, tries to achieve the RSCP value of respective cell respectively.
Due to P-CCPCH use Midamble code offset 0 launch (channel estimation results totally 128 footpaths, divide 8 windows, every window 16 footpath, first window i.e. No. 0 offset window that P-CCPCH uses), so the channel estimation value that the RSCP value of P-CCPCH gets 16 articles of footpaths that No. 0 offsets in corresponding channel window adds up, that is:
Wherein, h
ibe channel estimation value, i is the code name of these 16 footpaths (getting 0 to 15).
It should be noted that, due to the restriction of hardware condition, such as the consideration in cost and space, the number of cells of simultaneously carrying out channel estimating in above-mentioned steps four also can be restricted, such as when the channel estimating can only carrying out Parallel Interference Cancellation to four communities simultaneously, and when comprising the community of five or more in a synchronized cells group, then need to carry out at least at twice step 4, the channel estimation value of each community in this group can be obtained.
So, in step 4, the cell channel estimated value of all cell set all can be calculated, then in step 5, the RSCP of whole adjacent cell be calculated.This obviously needs larger spatial cache, and in order to save spatial cache, the channel estimation value without the need to retaining all communities calculates each RSCP value to neighbor cell more one by one, and we provide following solution in another embodiment, as shown in Figure 3.
Step one is for obtaining the timing information of adjacent cell to be measured;
Step 2 for carry out synchronized cells grouping to adjacent cell to be measured, and determines the TS0 timing information of synchronized cells group;
Step 3 is determine according to the TS0 timing information of step 2 the midamble data that this synchronized cells group is corresponding;
Step 4, for carry out Parallel Interference Cancellation (can carry out taking turns iteration) and channel estimating in the group of synchronized cells, obtains the channel estimation value of several communities of parallel processing more;
Step 5 is that the channel estimation value obtained step 4 calculates corresponding RSCP value.
Step 6 is whether the adjacent cell judged in this synchronized cells group is all completed (namely whether obtaining the interior adjacent cell RSCP value of all groups).As mentioned above, carry out the number of cells restriction of channel estimating in step 4 simultaneously, the community number comprised in a synchronized cells group may be less than, when this happens, turn back to step 4, all the other communities are carried out to counteracting and the channel estimating of parallel interference, then carry out step 5, until judged result is that the RSCP value of each community in this group draws in step 6.
Step 7 is the RSCP value being each community in this cell set when the judged result of step 6 when drawing, judges whether that the RSCP value of all synchronized cells groups is completed.If still there is the synchronized cells group of not carrying out RSCP measuring and calculating, then turn back to step 3, according to the TS0 timing information of other cell set divided in step 2, obtain the midamble data of this cell set, continue step 4 and subsequent step thereof again, until the RSCP value that the judged result of step 7 is all synchronized cells group is completed.
On the basis of the above embodiments, eliminate as interference will be carried out further, can be that adjacent cell in the group of synchronized cells is not all completed in above-mentioned steps six judged result, when returning step 4, from the community calculating RSCP value, select the community of some, with the community of not yet carrying out channel estimating, together also again carry out channel estimating through Parallel Interference Cancellation.
For an example intuitively, six communities are had in certain synchronized cells group, owing to can only do parallel processing to maximum four communities at every turn, first Parallel Interference Cancellation and channel estimating are being done to Qian Sige community, and after calculating RSCP value according to channel estimation value, therefrom select the community that two RSCP values are larger, with the Liang Ge community of not carrying out first calculating, together do second time Parallel Interference Cancellation and channel estimating.Second time one has the parallel processing of four communities, and than the parallel processing of Liang Ge community, more effective elimination disturbing, and why select the community that RSCP value is larger, is to better eliminate strong adjacent interference.In the middle of this example, when the community number selected is set to three, then needs three process altogether.Because RSCP measuring and calculating (repeatedly Parallel Interference Cancellation and repeatedly channel estimating) was carried out repeatedly in some of them community, finally can therefrom select minimum value as final result.
It should be noted that, above-mentioned all execution modes and embodiment also solve the problem of channel estimating tap exit window simultaneously.As a rule, the channel impulse response of current service cell can drop in a scope (such as 16 taps), and this scope is called channel estimation window.When UE is synchronous with current service cell, the channel impulse response of meeting Deterministic service community drops within this channel estimation window scope.UE, usually to calculate the channel estimation window of channel impulse response with current service cell, calculates the channel estimation window of channel impulse response as with adjacent cell.If but certain adjacent cell differs larger with the timing of current service cell, the channel impulse response of this adjacent cell likely can not drop in this channel estimation window, be channel estimating tap exit window, make UE can not get the channel impulse response of this adjacent cell, make measuring range limited.
Why occurring exit window, is because use current service cell to calculate the channel estimation window of channel impulse response, and calculate the channel estimation window of channel impulse response as with all adjacent cells, namely all adjacent cells use same TS0.In the above-described embodiment and examples, adjacent cell is divided into multiple cell set, uses same TS0 in cell set, different districts group uses different TS0.Choosing of a cell set, be with the TS0 of power Qiang community timing for benchmark, before and after this TS0, have the chip of some and the scope of delimiting, make to there will not be exit window in each cell set.
Meanwhile, divide because have employed synchronized cells group, make in each group, to there is multiple community, Parallel Interference Cancellation iterative processing can be carried out between multiple community in group, if solve only in order to avoid exit window, allow each community use different TS0, cause the problem that cannot use parallel noise reduction.
The embodiment of the present invention additionally provides a kind of adjacent cell RSCP measurement mechanism, as shown in Figure 4.This device comprises following part:
Main control unit (RSCP_CTRL), for generation of the control signal of other each processing unit, comprise: to the enabling signal of data buffer storage unit transmitting and receiving data, the enabling signal of cell group is sent to pretreatment unit, and the enabling signal of the Signal estimation sent to arithmetic element.
Pretreatment unit (RSCP_PRE), for receive described main control unit cell group enabling signal after, adjacent cell to be measured is carried out to the division of synchronized cells group, obtains the timing information of synchronized cells group.
Data buffer storage unit (MID_BUF), after data enable signal is searched in the combination for receiving described main control unit, receiving midamble data and to go forward side by side row cache, and according to synchronized cells group timing information, selecting corresponding midamble code information to export.
Arithmetic element (PIC_MCHE), for receive described main control unit channel estimating enabling signal after, according to the midamble code information that described data buffer storage unit exports, carry out the estimation computing of channel impulse response based on multiple cell Parallel Interference Cancellation.
Post-processing unit (RSCP_POST), for calculating RSCP value to the channel estimation value obtained.
In order to be described in detail, specifically describing said apparatus embodiment referring to Fig. 5 is how to realize RSCP to measure.
1) RSCP_CTL (main control unit) receives the signal starting adjacent cell RSCP and measure, and RSCP-PRE (pretreatment unit) receiving package is containing the data of community ID information and the timing information corresponding to each adjacent cell.
No. ID, its small area and adjacent cell one_to_one corresponding.In general, if not selecting community first, measured through last time, each adjacent cell generates with RSCP value strong and weak order permutation table, and preserve (if network side is not issue community configured information first in UE side, after so measurement last time obtains RSCP value, generally also can with measured last time after the smoothing process of wattmeter that draws, obtain the wattmeter by power sequence upgraded).Timing information corresponding to adjacent cell is the deviate of adjacent cell relative to current service cell, supports the positive and negative 31chip of maximum deviation.
2) RSCP_CTL unit is to the enabling signal of MID_BUF (data buffer storage unit) transmitting and receiving data, and sends cell group enabling signal to RSCP-PRE unit.
2.1) MID_BUF unit receives the reception data enable signal of RSCP_CTL unit, receive midamble code data to comprise: the 16chip data before the midamble code position of TS0 time slot, midamble code 144chip data, the data of the 32chip after midamble code position, 192 (16+144+32) chip data altogether, to go forward side by side row cache, use the simple dual port RAM of a 192x16 here.After receiving, MID_BUF unit sends the notification signal received to RSCP_CTL unit.
2.2) after RSCP-PRE unit receives cell group enabling signal, according to the decision rule divided, synchronized cells group division is carried out to adjacent cell, supposes finally to generate four cell set, be labeled as cell_group0 respectively, cell_group1, cell_group2, cell_group3, and using the timing information of the timing information in the group of each synchronized cells corresponding to RSCP Qiang community as this cell set, be labeled as cell_groupt0, cell_groupt1, cell_groupt2, cell_groupt3.In synchronous group, community puts in order preferably also according to by arranging to weak order by force.
Suppose 16 adjacent cells altogether, adjacent cell is respectively C0, C1, C2, C3 ... C15, corresponding timing information is t0, t1, t2, t3 ... t15 is stored in timing information and preserves in module.Being chosen for cell_group0: the first judge module selects the TS0 of the community C0 that RSCP is the strongest in all adjacent cells as benchmark, if the ti of adjacent cell meets-tmin <=(ti-t0) <=tmax, then this adjacent cell is considered to C0 (or this synchronized cells group) basic synchronization and is included in Cell_group0.Wherein, tmin, tmax can prepare, maximum support 15chip, identical with said method embodiment, and recommending tmin to be 5chip, tmax is herein 11chip.Finally, cell_group0={C0, C1, C6, C8, C11, C15}; Second judge module judges whether also there are other adjacent cells outside cell_group0, if there is other adjacent cells, then will notify the first judge module, continues choosing of cell_group1.
Cell_group1 is chosen for: the first judge module selects RSCP Qiang community C2 as benchmark from the adjacent cell outside cell_group0, then when the ti of adjacent cell meets-tmin <=(ti-t2) <=tmax, Ze Gai community is just included in cell_group1, second judge module continues to judge whether also there are other adjacent cells outside cell_group1, if there is other adjacent cells, then to continue choosing of cell_group2, the like composition cell_group2 and cell_group3.
After RSCP-PRE dividing elements, export cell id cell_groupi and the timing information cell_groupti of synchronized cells group to RSCP-CTRL unit.Output order is: first cell_group0, then is cell_group1, cell_group2, cell_group3.
3) when above-mentioned 2.1) and 2.2) information all received by RSCP-CTRL unit after, (time of the information later received is as the criterion) RSCP-CTRL unit produces PIC_MCHE enabling signal (Signal estimation enabling signal), carries the timing information of synchronized cells group.Suppose in this example, the hardware processing capability of PIC_MCHE (arithmetic element) is the computing simultaneously processing at most four communities, so RSCP-CTRL unit then needs to carry out selection grouping to the community of cell_group0, exports No. ID that epicycle carries out four communities of channel estimating to PIC_MCHE unit.
Community selects the principle of grouping to be that first time selects Qian Sige community (0,1 in cell_group0,6,8) carry out the channel estimating on Parallel Interference Cancellation basis, recommend to adopt four-wheel iterative PIC, obtain the channel estimation value of these four communities.This example, for taking into full account the interference of strong adjacent cell, namely obtains C0, C1, C6 and C8 tetra-communities RSCP value corresponding respectively by RSCP_POST (post-processing unit) at the channel estimation value obtaining these four communities.When RSCP-CTRL unit second time selects grouping, according to RSCP value result of calculation in C0, C1, C6 and C8 tetra-communities, (this value can be arranged, and retains the strongest three/two/mono-to retain the most Qiang Liangge community of RSCP, here for two), be set to max0, max1, by Ling Liangge community C11 and C15 from cell_group0, composition (max0, max1,11,15) channel estimating on Parallel Interference Cancellation basis is carried out.If also comprise more adjacent cell in cell_group0, can mode continue to select grouping, until all communities of cell_group0 all obtain channel estimation value successively.
Above-mentioned 3) in, after PIC_MCHE unit starting, MID_BUF unit, according to the timing information cell_groupti of synchronized cells group, selects the data of 128chip in corresponding midamble code to export PIC_MCHE unit to.
PIC_MCHE unit, the basic midamble code of this community corresponding to No. ID, the community export RSCP-CTRL unit, with MID Buf unit or the midamble agate data of getting, carries out the channel estimating computing of multiple cell parallel interference canceller.During special circumstances, as when only having a road input signal (such as cell set only comprises a community or epicycle Zhi Yige community), PIC_MCHE unit adopts Denoising Algorithm to carry out denoising to the channel impulse response of each adjacent cell and obtains channel estimation value.
RSCP-POST unit, reprocessing is done to the channel estimation value that PIC_MCHE unit obtains, comprising:
Calculate RSCP value according to channel estimation value, and the RSCP value calculated is sorted, export No. ID of these communities in order to RSCP_CTRL unit (such as C1, C6, C0, C8).Whether all communities in this cell set of RSCP_CTRL unit judges have obtained RSCP value all, if (such as C11 and C15) does not obtain RSCP value in Shang You community, from the community obtaining RSCP, select the first two (C1 and C6 as in this example) to be set to max0 and max1, be more together supplied to PIC_MCHE unit with C11 and C15.If all communities in this cell set of RSCP_CTRL unit judges have obtained RSCP value all, then notify that RSCP-POST unit exports the RSCP value of the whole community of this group.
RSCP-POST unit also can only calculate RSCP value according to channel estimation value, calculating gained is transferred to RSCP_CTRL unit, the power of being carried out RSCP by RSCP_CTRL unit sorts, and therefrom selects the community that RSCP is strong, participates in next round Parallel Interference Cancellation and channel estimating.
Consider strong adjacent interfered cell (the such as max0 in the group of synchronized cells, max1), repeatedly may carry out channel estimation process, obtain multiple RSCP value, the measured value of wherein minimum RSCP value (also can retain first time calculated value, or the mean value repeatedly calculated) as this community is retained in the present embodiment.
After completing the RSCP measurement of synchronized cells group cell_group0, RSCP_CTRL adopts the information from the synchronized cells group cell_group1 that RSCP-PRE unit obtains, and continues to initiate the measurement to the RSCP value of community in cell_group1.
Adjacent cell RSCP measurement mechanism in literary composition, is generally arranged in the baseband processing module of UE.There is the UE of this RSCP measurement mechanism, RSCP measured value can be obtained more accurately, optimize the process of cell reselection, thus make UE have more excellent communication quality.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (8)
1. a method of measurement of adjacent cell received signal code power RSCP, is applicable to user equipment (UE), it is characterized in that, described method of measurement comprises:
Obtain each adjacent cell timing information of current service cell;
According to each adjacent cell RSCP value that each adjacent cell timing information and last time obtain, carry out the division of synchronized cells group, obtain synchronized cells group, and obtain the timing information of synchronized cells group;
Timing information according to described synchronized cells group obtains corresponding midamble code data;
In a synchronized cells group, Parallel Interference Cancellation process is carried out to multiple adjacent cell, and obtain the channel estimation value of multiple adjacent cell in the group of described synchronized cells;
RSCP value is tried to achieve according to described channel estimation value;
In the described each adjacent cell RSCP value obtained according to each adjacent cell timing information and last time, carry out the division of synchronized cells group, and obtain in the timing information of synchronized cells group:
Each adjacent cell only belongs to a synchronized cells group;
The timing information of all adjacent cells in a synchronized cells group, and the difference between the timing information of the adjacent cell as benchmark community in the group of described synchronized cells is in preset range;
With the timing information of an adjacent cell in the group of described synchronized cells, as the timing information of synchronized cells group.
2. method of measurement as claimed in claim 1, is characterized in that, the described adjacent cell as timing information benchmark, for unallocated in the adjacent cell of synchronized cells group, and the adjacent cell that RSCP is the strongest;
With the timing information of an adjacent cell in the group of described synchronized cells, the timing information as synchronized cells group is specially: with the timing information of the strongest adjacent cell of RSCP in the group of described synchronized cells, as the timing information of synchronized cells group.
3. the method for measurement as described in any one of claim 1 to 2, is characterized in that, described try to achieve RSCP value according to described channel estimation value after, described method of measurement comprises further:
This all obtains RSCP value to judge whether all communities in the group of described synchronized cells, as the adjacent cell still having this not obtain RSCP value, return described in a synchronized cells group, Parallel Interference Cancellation process is carried out to multiple adjacent cell, and obtains the step of the channel estimation value of multiple adjacent cell in the group of described synchronized cells;
If all communities in the group of described synchronized cells this all obtain RSCP value, judge whether this RSCP measurement of all synchronized cells group, as the cell set still having this to measure without RSCP, select the described cell set measured without RSCP, return the step that the described timing information according to described synchronized cells group obtains corresponding midamble code data.
4. method of measurement as claimed in claim 3, is characterized in that, described in return in a synchronized cells group, Parallel Interference Cancellation process is carried out to multiple adjacent cell, and the step obtaining the channel estimation value of multiple adjacent cell in the group of described synchronized cells is specially:
In the group of described synchronized cells in this acquired RSCP value, by the strong adjacent cell to weak selection some, this does not obtain the adjacent cell of RSCP value with in the group of described synchronized cells, together carries out Parallel Interference Cancellation process, and obtains corresponding channel estimation value.
5. a measurement mechanism of adjacent cell received signal code power RSCP, is characterized in that, described measurement mechanism comprises:
Main control unit, for starting the measurement of adjacent cell RSCP, producing control signal, comprising the enabling signal to data buffer storage unit transmitting and receiving data, the enabling signal of cell group is sent to pretreatment unit, and the enabling signal of the Signal estimation sent to arithmetic element;
Described pretreatment unit, for receiving the timing information of adjacent cell, according to adjacent cell timing information, and the adjacent cell RSCP value that last time obtains, carry out the division of synchronized cells group, and obtain the timing information of synchronized cells group;
Described data buffer storage unit, to go forward side by side row cache for receiving midamble data, and according to synchronized cells group timing information, selects corresponding midamble code information to export;
Described arithmetic element, for the midamble code information exported according to described data buffer storage unit, carries out channel estimating based on multiple cell Parallel Interference Cancellation, obtains channel estimation value;
Post-processing unit, calculates RSCP value for the channel estimation value obtained arithmetic element;
Described pretreatment unit carries out being divided into of synchronized cells group: each adjacent cell only belongs to a synchronized cells group;
The timing information of all adjacent cells in a synchronized cells group, and the difference between the timing information of the adjacent cell as benchmark community in the group of described synchronized cells is in preset range;
The timing information that described pretreatment unit obtains synchronized cells group is: with the timing information of an adjacent cell in the group of described synchronized cells, as the timing information of synchronized cells group.
6. measurement mechanism as claimed in claim 5, is characterized in that, the described adjacent cell as timing information benchmark, for unallocated in the adjacent cell of synchronized cells group, and the adjacent cell that RSCP is the strongest;
The timing information that described pretreatment unit obtains synchronized cells group is specially: with the timing information of the strongest adjacent cell of RSCP in the group of described synchronized cells, as the timing information of synchronized cells group.
7. the measurement mechanism as described in any one of claim 5 ~ 6, it is characterized in that, described main control unit comprises further: the first judge module, for judging whether all communities in the group of described synchronized cells, this all obtains RSCP value, as the adjacent cell still having this not obtain RSCP value, then notify described arithmetic element; And
Second judge module, for judging whether this RSCP measurement of all synchronized cells group, as the cell set still having this to measure without RSCP, selecting the described cell set measured without RSCP, and notifying described data buffer storage unit.
8. measurement mechanism as claimed in claim 7, it is characterized in that, described post-processing unit, is further used for, and to this acquired adjacent cell RSCP in the group of described synchronized cells by strong and weak arrangement, and will put in order and notifies described main control unit; Described first judge module notifies that described arithmetic element is, by the strong adjacent cell to weak selection some, described arithmetic element is notified together with the adjacent cell that this in the group of described synchronized cells does not obtain RSCP, make described arithmetic element not obtain the adjacent cell of RSCP to the adjacent cell of described selection and described this, do multiple cell Parallel Interference Cancellation and channel estimating.
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| US8774066B2 (en) * | 2012-05-31 | 2014-07-08 | Intel Mobile Communications GmbH | Macro-femto inter-cell interference mitigation |
| CN103686771B (en) * | 2012-09-20 | 2018-02-02 | 深圳市中兴微电子技术有限公司 | A kind of device, method and terminal for configuring inter-frequency interference cell |
| CN104735002B (en) * | 2013-12-23 | 2018-08-03 | 联芯科技有限公司 | A kind of removing method and terminal of interference signal |
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