CN102137484A - 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, relate in particular to the method for measurement and the device of adjacent sub-district 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 is higher than current service cell, (is moved such as the user and causes user terminal zone of living in to change, build communication quality such as user terminal (UE) and current service cell base station and become abominable, changing such as the current wireless environment), user terminal (UE) will the triggering cell gravity treatment.Wherein, P-CCPCH (Primary Common Control Physical Channel is carried out in adjacent sub-district, Primary Common Control Physical Channel) measuring is the main standard that the sub-district is selected, 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 of cell selecting.
With the TD-SCDMA system is example, the RSCP method of measurement of the relevant adjacent sub-district P-CCPCH of existing great majority, promptly obtain midamble (middle trained sequence) code data, according to the basic midamble sign indicating number of each adjacent sub-district and the timing information (TS0 time slot) of current service cell, obtain the channel estimation value of adjacent sub-district, thereby try to achieve the RSCP value of the P-CCPCH of Target cell.Key step as shown in Figure 1.
1) after UE and current service cell are carried out synchronously, regularly receives the broadcast that this Serving cell issues, comprise the id information of each adjacent sub-district of this Serving cell in the broadcast, can know the basic Midamble sign indicating number of this neighbour sub-district according to the id information of adjacent sub-district.
2) because of being synchronous between current service cell and its each adjacent sub-district, different with the UE standoff distance again, promptly can there be deviation so each sub-district TS0 time slot arrives the time point of UE, makes UE put at one time and receive the mixed TS0 data that changing that each sub-district sends.UE asks channel impulse response with the basic Midamble sign indicating number of each adjacent sub-district respectively with the TS0Midamble sign indicating number that receives, and promptly channel estimating is carried out in each adjacent sub-district.
3) channel impulse response is asked the P-CCPCH RSCP value of each adjacent sub-district.
In order to improve measurement accuracy, in above-mentioned steps 3) before, generally can adopt Denoising Algorithm that the channel impulse response of each adjacent sub-district is carried out denoising, the accuracy of the channel estimating that obtains like this (being channel impulse response) can increase, and uses channel impulse response after the denoising to ask the P-CCPCH RSCP value of each adjacent sub-district again in step 3).
But, can't eliminate the strong jamming of neighbor cell to the mode that single subdistrict carries out denoising, suppress and equilibrium is the emphasis of channel estimating and disturb.
Summary of the invention
In order to improve the accuracy that RSCP measures, the embodiment of the invention provides the method for measurement of a kind of adjacent sub-district received signal code power (RSCP), is applicable to user equipment (UE), and described method of measurement comprises:
Obtain each adjacent sub-district timing information of current service cell;
According to each adjacent sub-district RSCP value of each adjacent sub-district timing information and acquisition last time, 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 is carried out in a plurality of adjacent sub-districts handle, and obtain the channel estimation value of a plurality of adjacent sub-districts in the described synchronized cells group;
Try to achieve the RSCP value according to described channel estimation value.
Further, in described each adjacent sub-district RSCP value, carry out the division of synchronized cells group, and obtain in the timing information of synchronized cells group according to each adjacent sub-district timing information and acquisition last time:
Each adjacent sub-district only belongs to a synchronized cells group;
The timing information of all the adjacent sub-districts in synchronized cells group, and in the described synchronized cells group as the difference between the timing information of benchmark adjacent cells of cells in preset range;
With the timing information of an adjacent sub-district in the described synchronized cells group, as the timing information of synchronized cells group.
Further, described adjacent sub-district as the timing information benchmark, for unallocated in the adjacent sub-district of synchronized cells group, the adjacent sub-district that RSCP is the strongest;
With the timing information of an adjacent sub-district in the described synchronized cells group, be specially as the timing information of synchronized cells group: with the timing information of the adjacent sub-district that RSCP is the strongest in the described synchronized cells group, as the timing information of synchronized cells group.
More excellent, describedly to try to achieve after the RSCP value according to described channel estimation value, described method of measurement further comprises:
This all obtains the RSCP value to judge whether all interior sub-districts of described synchronized cells group, as still there being this not obtain the adjacent sub-district of RSCP value, return described in a synchronized cells group, Parallel Interference Cancellation is carried out in a plurality of adjacent sub-districts handle, and obtain the step of the channel estimation value of a plurality of adjacent sub-districts in the described synchronized cells group;
If this all obtains the RSCP value all sub-districts in the described synchronized cells group, judge whether this RSCP measurement of all synchronized cells groups, as the cell set that still has this to measure without RSCP, select described cell set, return the described step that obtains corresponding midamble code data according to the timing information of described synchronized cells group without the RSCP measurement.
More excellent on the basis of the above, described returning in a synchronized cells group carried out Parallel Interference Cancellation to a plurality of adjacent sub-districts and handled, and the step that obtains the channel estimation value of a plurality of adjacent sub-districts in the described synchronized cells group is specially:
In described synchronized cells group in this acquired RSCP value, by strong adjacent sub-district to weak selection some, with this does not obtain the adjacent sub-district of RSCP value in the described synchronized cells group, together carry out Parallel Interference Cancellation and handle, and obtain corresponding channel estimation value.
The embodiment of the invention provides the measurement mechanism of a kind of adjacent sub-district received signal code power RSCP simultaneously, comprises:
Main control unit, be used to start the measurement of adjacent sub-district RSCP, produce control signal, comprise enabling signal to the data buffer storage unit transmitting and receiving data, send the enabling signal of cell group to pretreatment unit, and the enabling signal of estimating to the signal that arithmetic element sends;
Described pretreatment unit is used to receive the timing information of adjacent sub-district, according to adjacent sub-district timing information, and the adjacent sub-district RSCP value that obtained last time, carry out the division of synchronized cells group, and obtain the timing information of synchronized cells group;
Described data buffer storage unit is used to receive the midamble data row cache of going forward side by side, and according to synchronized cells group timing information, selects corresponding midamble sign indicating number information output;
Described arithmetic element is used for the midamble sign indicating number information according to described data buffer storage unit output, carries out channel estimating based on many sub-districts Parallel Interference Cancellation, obtains channel estimation value;
Post-processing unit, the channel estimation value that is used for arithmetic element is obtained calculates the RSCP value.
Further, described pretreatment unit carries out being divided into of synchronized cells group: each adjacent sub-district only belongs to a synchronized cells group;
The timing information of all the adjacent sub-districts in synchronized cells group, and in the described synchronized cells group as the difference between the timing information of benchmark adjacent cells of cells in preset range;
The timing information that described pretreatment unit obtains the synchronized cells group is: with the timing information of an adjacent sub-district in the described synchronized cells group, as the timing information of synchronized cells group.
Further, described adjacent sub-district as the timing information benchmark, for unallocated in the adjacent sub-district of synchronized cells group, the adjacent sub-district that RSCP is the strongest;
The timing information that described pretreatment unit obtains the synchronized cells group is specially: with the timing information of the adjacent sub-district that RSCP is the strongest in the described synchronized cells group, as the timing information of synchronized cells group.
Further, described main control unit further comprises: first judge module, and this all obtains the RSCP value to be used to judge whether all interior sub-districts of described synchronized cells group, does not obtain the adjacent sub-district of RSCP value as this is still arranged, and then notifies described arithmetic element; And
Second judge module is used to judge whether this RSCP measurement of all synchronized cells groups, as this still being arranged without the cell set that RSCP measures, selects described cell set without the RSCP measurement, and notifies described data buffer storage unit.
On the basis of the above further, described post-processing unit is further used for, and this acquired adjacent sub-district RSCP in the described synchronized cells group is arranged by strong and weak, and will put in order and notify described main control unit; Described first judge module notifies described arithmetic element to be, by strong adjacent sub-district to weak selection some, in described synchronized cells group this do not obtain the adjacent sub-district of RSCP and notifies described arithmetic element, make described arithmetic element not obtain the adjacent sub-district of RSCP, do many sub-districts Parallel Interference Cancellation and channel estimating the adjacent sub-district and described this of described selection.
The embodiment of the invention is by being divided into the synchronized cells group to adjacent microzonation, use same TS0 in each cell set, in group,, improved accuracy of channel estimation, thereby improved the accuracy of adjacent sub-district PCCPCH RSCP measured value a plurality of sub-districts noise reduction process that walks abreast.
Description of drawings
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 of the present invention's one adjacent sub-district RSCP measurement;
Fig. 3 measures the flow chart of embodiment for the present invention one adjacent sub-district RSCP;
Fig. 4 is the block diagram of the present invention one adjacent sub-district RSCP measurement mechanism embodiment;
Fig. 5 is the schematic diagram of the present invention one adjacent sub-district RSCP measurement mechanism embodiment.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention is clearer,, the embodiment of the invention is done explanation in further detail below in conjunction with embodiment and accompanying drawing.At this, illustrative examples of the present invention and explanation are used to explain the present invention, but not as a limitation of the invention.
The invention provides the execution mode that a kind of adjacent sub-district PCCPCH RSCP (hereinafter to be referred as RSCP) measures, as shown in Figure 2, comprise following step:
At first, obtain each adjacent sub-district timing information of current service cell;
Each adjacent sub-district is divided, obtained the synchronized cells group;
Timing information according to the synchronized cells group obtains corresponding midamble code data;
In a synchronized cells group, Parallel Interference Cancellation is carried out in how adjacent sub-district handle, and obtain the channel estimation value of these adjacent sub-districts;
Channel estimation value according to adjacent sub-district obtains the RSCP value.
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 1, each adjacent sub-district timing information of acquisition current service cell.
UE obtains the positional information of each adjacent cell downlink pilot time slot (DwPTS), thus push away the timing information of each adjacent sub-district.Its concrete steps comprise:
1) receives the broadcast that current service cell issues, obtain the id information of current service cell,, obtain the downlink frequency pilot code (SYNC_DL) of this neighbour sub-district according to sub-district ID number.
2) SYNC_DL with each adjacent sub-district carries out multiple correlation with the DwPTS data that current service cell receives respectively, obtains the peak value of each adjacent sub-district, and the residing location point of this peak value is the position of each adjacent sub-district DwPTS.
3) UE converses the position of the TS0 time slot of each sub-district, i.e. timing information according to the position of each sub-district DwPTS.
Step 2 is divided each adjacent sub-district, obtains the synchronized cells group.
According to certain decision rule each adjacent sub-district is divided, the cell block of division is called the synchronized cells group.Each synchronized cells group adopts same TS0 timing information.
Concrete decision rule can for:
At first in these adjacent sub-districts, select the strongest adjacent sub-district of a received signal code power (RSCP), with the timing information of this sub-district as benchmark, this neighbour sub-district is the adjacent sub-district of benchmark, the timing information of other adjacent sub-district is compared with it, make timing information be in benchmark certain limit on every side, (chip is a time span unit to shift to an earlier date 5chip or hysteresis 11chip such as timing information than benchmark, such as the DwPTS time slot is 96chip) within adjacent sub-district, can regard as the sub-district basic synchronization the strongest, so form a synchronized cells group with power.Above-mentioned in advance and the value of several chip that lag behind be than the figure of merit, specifically can different cell selecting scopes be set at different hardware devices and different expansion window length.
Above-mentioned decision rule is more excellent scheme, also can otherwise TS0 be divided into groups near the adjacent sub-district of (also being basic synchronization), such as selecting the most weak adjacent sub-district of RSCP, its timing information as benchmark, is made benchmark synchronized cells group in the adjacent sub-district of composition of certain limit on every side.
Form after the synchronized cells group, from remaining adjacent sub-district, select the strongest sub-district of received signal code power, set up a new synchronized cells group by top principle, eliminating is outside this cell set, still proceed sub-district screening and divide, all be divided up to all adjacent sub-districts and finish according to top principle.
Identical timing information is adopted in adjacent sub-district in each synchronized cells group, and adopts the pairing TS0 timing information in the strongest sub-district of received signal code power (RSCP) in this synchronized cells group.Selecting the strongest sub-district of RSCP herein is more excellent scheme, such as also selecting the next TS0 timing information as the synchronized cells group in strong sub-district RSCP time.Need to prove, can after the adjacent sub-district of definite benchmark, determine that promptly the timing information of the adjacent sub-district of this benchmark is the timing information of this synchronized cells group, also can after the division of finishing this cell set, determine the timing information of this group again.In a kind of situation in back, the timing information of the adjacent sub-district of benchmark is only done the microzonation timesharing and is used, and must not become the timing information of this cell set.
In this step, if not carrying out cell selecting (issuing cell information for the first time) first such as network side, the RSCP of each sub-district has obtained in last once RSCP measures and has existed with the form of wattmeter, this carries out can forming new wattmeter after adjacent sub-district RSCP measures, and is used by cell selecting next time.If cell selecting first, (each cell number is 0 can to give tacit consent to the 0th when dividing first group, 1,2,3...... can certainly be defaulted as other) timing information of sub-district is benchmark, the most preceding sub-district timing information of last sequence number is a benchmark when dividing second group, carries out the division of synchronized cells group, and the like.
Step 3 according to the TS0 timing information of this synchronized cells group, finds the relevant position of the midamble sign indicating number of this TS0 correspondence, obtains corresponding midamble code data from the buffer area that receives data.Receive the midamble sign indicating number and also put into the step that receives data buffer area, can with above-mentioned steps two parallel processings, do not have an inevitable sequencing in other words, promptly step 3 is as long as make under the two situation about all finishing.
Step 4 is carried out channel estimating simultaneously to a plurality of sub-districts of same cell set, handles by Parallel Interference Cancellation, obtains the channel estimation value of these several sub-districts.The method of Parallel Interference Cancellation is utilized the sub-district of the same TS0 timing information of a plurality of uses, can better eliminate the interference between the sub-district, estimates that with the channel impulse response that this kind mode obtains the accuracy of (being channel estimating) value can improve greatly.More excellent mode is that the Parallel Interference Cancellation of doing iteration is handled.A sub-district may appear only comprising in the cell set in special circumstances, though can't make Parallel Interference Cancellation this moment, disturbs but still can eliminate part by the noise reduction mode.
Step 5 according to the channel estimation value of each sub-district, is tried to achieve the RSCP value of respective cell respectively.
Since P-CCPCH uses be Midamble sign indicating number skew 0 emission (channel estimation results totally 128 footpaths, divide 8 windows, every window 16 footpaths, the first window that P-CCPCH uses i.e. No. 0 skew window), so the RSCP value of P-CCPCH is got the channel estimation value in 16 footpaths in the corresponding channel window of No. 0 skew and is added up, that is:
Wherein, h
iBe channel estimation value, i is the code name in these 16 footpaths (getting 0 to 15).
Need to prove, because the restriction of hardware condition, such as consideration for cost and space, the number of cells of carrying out channel estimating in above-mentioned steps four simultaneously also can be restricted, such as working as the channel estimating that to carry out Parallel Interference Cancellation simultaneously to four sub-districts, and when comprising five or more sub-district in synchronized cells group, then need to carry out at least at twice step 4, can obtain the channel estimation value of interior each sub-district of this group.
So, can be in step 4 the cell channel estimated value of all cell set be all calculated, the RSCP to whole adjacent sub-districts calculates in step 5 again.This obviously needs bigger spatial cache, and in order to save spatial cache, the channel estimation value that need not to keep all sub-districts calculates each more one by one to the RSCP of neighbor cell value, and we provide following solution in another embodiment, as shown in Figure 3.
Step 1 is for obtaining the timing information of adjacent sub-district to be measured;
Step 2 is divided into groups for adjacent sub-district to be measured being carried out synchronized cells, and the TS0 timing information of definite synchronized cells group;
Step 3 is for determining the midamble data of this synchronized cells group correspondence according to the TS0 timing information of step 2;
Step 4 obtains the channel estimation value of several sub-districts of parallel processing for carry out Parallel Interference Cancellation (can carry out many wheel iteration) and channel estimating in the synchronized cells group;
Step 5 calculates corresponding RSCP value for the channel estimation value that step 4 is obtained.
Step 6 is for judging whether the adjacent sub-district in this synchronized cells group all tests finish (promptly whether obtaining all interior adjacent sub-district of group RSCP values).As mentioned above, carry out the number of cells restriction of channel estimating in the step 4 simultaneously, may be less than the sub-district number that comprises in the synchronized cells group, when this situation occurring, turn back to step 4, the counteracting and the channel estimating of parallel interference are carried out in all the other sub-districts, carry out step 5 again, judged result draws for the RSCP value of each sub-district in this group in step 6.
When step 7 had drawn for the RSCP value of each sub-district in the judged result of step 6 is this cell set, the RSCP value that judges whether all synchronized cells groups had been tested and has been finished.If the synchronized cells group of not carrying out the RSCP measuring and calculating is still arranged, then turn back to step 3, TS0 timing information according to other cell set of dividing in the step 2, obtain the midamble data of this cell set, continue step 4 and subsequent step thereof again, tested for the RSCP value of all synchronized cells groups up to the judged result of step 7 and finish.
On the basis of the above embodiments, as will further carrying out interference eliminated, can above-mentioned steps six judged results be in the synchronized cells group adjacent sub-district all the test finish, when returning step 4, from the sub-district that calculates the RSCP value, select the sub-district of some,, together also carry out channel estimating once more through Parallel Interference Cancellation with the sub-district of not carrying out channel estimating as yet.
For an example intuitively, have six sub-districts in certain synchronized cells group, owing to can only do parallel processing to maximum four sub-districts at every turn, first Parallel Interference Cancellation and channel estimating are being done in preceding four sub-districts, and calculate after the RSCP value according to channel estimation value, therefrom select two sub-districts that the RSCP value is bigger,, together do Parallel Interference Cancellation and channel estimating for the second time with two sub-districts of calculating first.Have the parallel processing of four sub-districts the second time one, and than the parallel processing of two sub-districts, can more effective elimination disturb, and why select the bigger sub-district of RSCP value, be in order better to eliminate adjacent by force the interference.In the middle of this example, when the sub-district number of selecting is set to three, then need three processing altogether.Because RSCP measuring and calculating (repeatedly Parallel Interference Cancellation and repeatedly channel estimating) was carried out repeatedly in the some of them sub-district, can therefrom select minimum value as final result at last.
Need to prove that above-mentioned all execution modes and embodiment have also solved the problem of channel estimating tap exit window simultaneously.As a rule, the channel impulse response of current service cell can drop in the scope (such as 16 taps), and this scope is called channel estimation window.When UE and current service cell are synchronous, can guarantee that the channel impulse response of Serving cell drops within this channel estimation window scope.UE usually with the channel estimation window of current service cell calculating channel impulse response, as with the channel estimation window of adjacent sub-district calculating channel impulse response.If but the timing of certain adjacent sub-district and current service cell differs bigger, the channel impulse response of this adjacent sub-district might not can drop in this channel estimation window, be channel estimating tap exit window, make UE can not get the channel impulse response of this adjacent sub-district, make measuring range limited.
Exit window why occurring, is because use the channel estimation window of current service cell calculating channel impulse response, as with the channel estimation window of all adjacent sub-district calculating channel impulse responses, promptly same TS0 is used in all adjacent sub-districts.In the above-described embodiment and examples, adjacent microzonation is divided into a plurality of cell set, in cell set, use same TS0, the different districts group is used different TS0.Choosing of a cell set, be with power the TS0 of strong sub-district regularly be benchmark, before and after this TS0, the chip of some is arranged all and the scope of delimiting, make exit window can not occur in each cell set.
Simultaneously, because adopted the synchronized cells group to divide, make each have a plurality of sub-districts in organizing, can carry out the Parallel Interference Cancellation iterative processing between a plurality of sub-districts in the group, if only solved for fear of exit window, allow each sub-district use different TS0, cause using the problem of parallel noise reduction.
The embodiment of the invention also provides a kind of adjacent sub-district RSCP measurement mechanism, as shown in Figure 4.This device comprises following part:
Main control unit (RSCP_CTRL), be used to produce the control signal of other each processing unit, comprise: to the enabling signal of data buffer storage unit transmitting and receiving data, send the enabling signal of cell group to pretreatment unit, and the enabling signal of estimating to the signal that arithmetic element sends.
Pretreatment unit (RSCP_PRE), after being used to receive the cell group enabling signal of described main control unit,, the division of synchronized cells group is carried out in adjacent sub-district to be measured, obtain the timing information of synchronized cells group.
Data buffer storage unit (MID_BUF) after data enable signal is searched in the combination that is used to receive described main control unit, receives the midamble data row cache of going forward side by side, and according to synchronized cells group timing information, selects corresponding midamble sign indicating number information output.
Arithmetic element (PIC_MCHE) after being used to receive the channel estimating enabling signal of described main control unit, according to the midamble sign indicating number information of described data buffer storage unit output, is carried out the estimation computing of channel impulse response based on many sub-districts Parallel Interference Cancellation.
Post-processing unit (RSCP_POST) is used for the channel estimation value that obtains is calculated the RSCP value.
In order to be described in detail, to specifically describe said apparatus embodiment below with reference to Fig. 5 and how to realize what RSCP measured.
1) RSCP_CTL (main control unit) receives and starts the signal that adjacent sub-district RSCP measures, and RSCP-PRE (pretreatment unit) receives data and each the pairing timing information in adjacent sub-district that comprises sub-district ID information.
Wherein sub-district ID number corresponding one by one with adjacent sub-district.In general, if not selecting the sub-district first, measured through last time, each adjacent sub-district generates with the strong and weak sequence arrangement table of RSCP value, and preserve (if network side is not to issue community configured information first in the UE side, measured last time so after the RSCP value, and generally also can carry out smoothing processing, the wattmeter that obtains upgrading) by the power ordering with the wattmeter that drew after the measurement last time.The pairing timing information in adjacent sub-district is the deviate of adjacent sub-district with respect to current service cell, supports the positive and negative 31chip of maximum deviation.
2) the RSCP_CTL unit is to the enabling signal of MID_BUF (data buffer storage unit) transmitting and receiving data, and sends the cell group enabling signal to the RSCP-PRE unit.
2.1) the MID_BUF unit receives the reception data enable signal of RSCP_CTL unit, receiving the midamble code data comprises: the 16chip data before the midamble code position of TS0 time slot, midamble sign indicating number 144chip data, the data of 32chip behind the midamble code position, 192 (16+144+32) chip data altogether, the row cache of going forward side by side uses the simple dual port RAM of a 192x16 here.After receiving, the MID_BUF unit sends the notification signal that receives to the RSCP_CTL unit.
2.2) after the RSCP-PRE unit receives the cell group enabling signal, the synchronized cells group is carried out according to the decision rule of dividing in adjacent sub-district divide, suppose finally to generate four cell set, be labeled as cell_group0 respectively, cell_group1, cell_group2, cell_group3, and with the pairing timing information in the strongest sub-district of RSCP in each synchronized cells group as the timing information of this cell set, be labeled as cell_groupt0, cell_groupt1, cell_groupt2, cell_groupt3.Synchronously in the group sub-district put in order preferred also according to by by force to weak sequence arrangement.
Suppose 16 adjacent sub-districts altogether, adjacent sub-district is respectively C0, C1, and C2, C3 ... C15, corresponding timing information is t0, t1, t2, t3 ... t15 is stored in timing information and preserves in the module.To being chosen for of cell_group0: first judge module selects the TS0 of the sub-district C0 that RSCP is the strongest in all adjacent sub-districts as benchmark, if the ti of adjacent sub-district satisfies-tmin＜=(ti-t0)＜=tmax, then should the neighbour sub-district be considered to C0 (or this synchronized cells group) basic synchronization and be included among the Cell_group0.Wherein, tmin, tmax can prepare, the maximum 15chip that supports, embodiment is identical with said method, and recommending tmin herein is 5chip, and tmax is 11chip.At last, cell_group0={C0, C1, C6, C8, C11, C15}; Second judge module judges whether also there are other adjacent sub-districts outside the cell_group0, if there are other adjacent sub-districts, then will notify first judge module, continues choosing of cell_group1.
Cell_group1 is chosen for: select the strongest sub-district C2 of RSCP as benchmark the adjacent sub-district of first judge module outside cell_group0, then satisfy-tmin＜=(ti-t2)＜=tmax as the ti of adjacent sub-district, then this sub-district just is included among the cell_group1, second judge module continues to judge whether also there are other adjacent sub-districts outside the cell_group1, if there are other adjacent sub-districts, then to continue choosing of cell_group2, and the like form cell_group2 and cell_group3.
After the RSCP-PRE dividing elements finishes, to the cell id cell_groupi and the timing information cell_groupti of RSCP-CTRL unit output synchronized cells group.Output is in proper order: cell_group0 at first is cell_group1, cell_group2, cell_group3 again.
3) when above-mentioned 2.1) and 2.2) information all received by the RSCP-CTRL unit after, (time of the information that receives later on 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 handles ability of PIC_MCHE (arithmetic element) is for handling the computing of four sub-districts at most simultaneously, the RSCP-CTRL unit then needs to select grouping to the sub-district of cell_group0 so, carries out ID number of four sub-districts of channel estimating to PIC_MCHE unit output epicycle.
The principle of cell selecting grouping is, selects among the cell_group0 preceding four sub-districts (0,1,6,8) to carry out the channel estimating on the Parallel Interference Cancellation basis for the first time, recommends to adopt four-wheel iteration Parallel Interference Cancellation, obtains the channel estimation value of these four sub-districts.This example promptly obtains C0, C1, the corresponding respectively RSCP value of C6 and four sub-districts of C8 by RSCP_POST (post-processing unit) for taking into full account the interference of strong adjacent sub-district at the channel estimation value that obtains these four sub-districts.When the RSCP-CTRL unit is selected to divide into groups for the second time, according to RSCP value result of calculation in C0, C1, C6 and four sub-districts of C8, (this value can be provided with, and keeps the strongest three/two/one to keep two the strongest sub-districts of RSCP, here be example with two), be made as max0, max1, from cell_group0 with other two sub-district C11 and C15, form (max0, max1,11,15) carry out the channel estimating on the Parallel Interference Cancellation basis.If also comprise more adjacent sub-district among the cell_group0, mode continues to select grouping successively, all obtains channel estimation value up to all sub-districts of cell_group0.
Above-mentioned 3) in, after the PIC_MCHE unit starting, the MID_BUF unit selects the data of 128chip in the corresponding midamble sign indicating number to export the PIC_MCHE unit to according to the timing information cell_groupti of synchronized cells group.
The PIC_MCHE unit to basic midamble sign indicating number that should the sub-district, with the MID Buf unit or the midamble agate data of getting, carries out the channel estimating computing of many sub-districts parallel interference elimination with sub-district ID number institute of RSCP-CTRL unit output.During special circumstances, as when having only one road input signal when (only comprising only sub-district of a sub-district or epicycle such as cell set), the PIC_MCHE unit adopts Denoising Algorithm that the channel impulse response of each adjacent sub-district is carried out denoising and obtains channel estimation value.
Reprocessing is done to the channel estimation value that the PIC_MCHE unit obtains in the RSCP-POST unit, comprising:
Calculate the RSCP value according to channel estimation value, and the RSCP value that calculates is sorted, ID number that exports these sub-districts in order to the RSCP_CTRL unit (such as C1, C6, C0, C8).Whether all sub-districts in this cell set of RSCP_CTRL unit judges have all obtained the RSCP value, if still there is sub-district (such as C11 and C15) not obtain the RSCP value, from the sub-district that obtains RSCP, select preceding two (as C1 in this example and C6) to be made as max0 and max1, together offer the PIC_MCHE unit with C11 and C15 again.If all sub-districts in this cell set of RSCP_CTRL unit judges have all obtained the RSCP value, then notify the RSCP-POST unit to export the RSCP value that this organizes whole sub-districts.
The RSCP-POST unit also can only calculate the RSCP value according to channel estimation value, to calculate gained and transfer to the RSCP_CTRL unit, carry out the power ordering of RSCP by the RSCP_CTRL unit, and therefrom select the strong sub-district of RSCP, participate in next round Parallel Interference Cancellation and channel estimating.
Consider that strong adjacent interfered cell in the synchronized cells group is (such as max0, max1), may repeatedly carry out channel estimation process, obtain a plurality of RSCP values, keep the measured value of wherein minimum RSCP value (also can keep calculated value for the first time, perhaps the mean value that repeatedly calculates) in the present embodiment as this sub-district.
After finishing the RSCP measurement of synchronized cells group cell_group0, RSCP_CTRL adopts the information of the synchronized cells group cell_group1 that obtains from the RSCP-PRE unit, continues the measurement of initiation to the RSCP value of sub-district in the cell_group1.
Adjacent sub-district RSCP measurement mechanism in the literary composition generally is arranged in the baseband processing module of UE.UE with this RSCP measurement mechanism can obtain the RSCP measured value more accurately, has optimized the process of sub-district gravity treatment, thereby makes UE have more excellent communication quality.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle 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 (10)
1. the method for measurement of an adjacent sub-district received signal code power RSCP is applicable to user equipment (UE), it is characterized in that, described method of measurement comprises:
Obtain each adjacent sub-district timing information of current service cell;
According to each adjacent sub-district RSCP value of each adjacent sub-district timing information and acquisition last time, 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 is carried out in a plurality of adjacent sub-districts handle, and obtain the channel estimation value of a plurality of adjacent sub-districts in the described synchronized cells group;
Try to achieve the RSCP value according to described channel estimation value.
2. method of measurement as claimed in claim 1 is characterized in that, in described each adjacent sub-district RSCP value according to each adjacent sub-district timing information and acquisition last time, carries out the division of synchronized cells group, and obtains in the timing information of synchronized cells group:
Each adjacent sub-district only belongs to a synchronized cells group;
The timing information of all the adjacent sub-districts in synchronized cells group, and in the described synchronized cells group as the difference between the timing information of benchmark adjacent cells of cells in preset range;
With the timing information of an adjacent sub-district in the described synchronized cells group, as the timing information of synchronized cells group.
3. method of measurement as claimed in claim 2 is characterized in that, described adjacent sub-district as the timing information benchmark, for unallocated in the adjacent sub-district of synchronized cells group, the adjacent sub-district that RSCP is the strongest;
With the timing information of an adjacent sub-district in the described synchronized cells group, be specially as the timing information of synchronized cells group: with the timing information of the adjacent sub-district that RSCP is the strongest in the described synchronized cells group, as the timing information of synchronized cells group.
4. as each described method of measurement of claim 1 to 3, it is characterized in that describedly try to achieve after the RSCP value according to described channel estimation value, described method of measurement further comprises:
This all obtains the RSCP value to judge whether all interior sub-districts of described synchronized cells group, as still there being this not obtain the adjacent sub-district of RSCP value, return described in a synchronized cells group, Parallel Interference Cancellation is carried out in a plurality of adjacent sub-districts handle, and obtain the step of the channel estimation value of a plurality of adjacent sub-districts in the described synchronized cells group;
If this all obtains the RSCP value all sub-districts in the described synchronized cells group, judge whether this RSCP measurement of all synchronized cells groups, as the cell set that still has this to measure without RSCP, select described cell set, return the described step that obtains corresponding midamble code data according to the timing information of described synchronized cells group without the RSCP measurement.
5. method of measurement as claimed in claim 4 is characterized in that, described returning in a synchronized cells group carried out Parallel Interference Cancellation to a plurality of adjacent sub-districts and handled, and the step that obtains the channel estimation value of a plurality of adjacent sub-districts in the described synchronized cells group is specially:
In described synchronized cells group in this acquired RSCP value, by strong adjacent sub-district to weak selection some, with this does not obtain the adjacent sub-district of RSCP value in the described synchronized cells group, together carry out Parallel Interference Cancellation and handle, and obtain corresponding channel estimation value.
6. the measurement mechanism of an adjacent sub-district received signal code power RSCP is characterized in that, described measurement mechanism comprises:
Main control unit, be used to start the measurement of adjacent sub-district RSCP, produce control signal, comprise enabling signal to the data buffer storage unit transmitting and receiving data, send the enabling signal of cell group to pretreatment unit, and the enabling signal of estimating to the signal that arithmetic element sends;
Described pretreatment unit is used to receive the timing information of adjacent sub-district, according to adjacent sub-district timing information, and the adjacent sub-district RSCP value that obtained last time, carry out the division of synchronized cells group, and obtain the timing information of synchronized cells group;
Described data buffer storage unit is used to receive the midamble data row cache of going forward side by side, and according to synchronized cells group timing information, selects corresponding midamble sign indicating number information output;
Described arithmetic element is used for the midamble sign indicating number information according to described data buffer storage unit output, carries out channel estimating based on many sub-districts Parallel Interference Cancellation, obtains channel estimation value;
Post-processing unit, the channel estimation value that is used for arithmetic element is obtained calculates the RSCP value.
7. measurement mechanism as claimed in claim 6 is characterized in that, described pretreatment unit carries out being divided into of synchronized cells group: each adjacent sub-district only belongs to a synchronized cells group;
The timing information of all the adjacent sub-districts in synchronized cells group, and in the described synchronized cells group as the difference between the timing information of benchmark adjacent cells of cells in preset range;
The timing information that described pretreatment unit obtains the synchronized cells group is: with the timing information of an adjacent sub-district in the described synchronized cells group, as the timing information of synchronized cells group.
8. measurement mechanism as claimed in claim 7 is characterized in that, described adjacent sub-district as the timing information benchmark, for unallocated in the adjacent sub-district of synchronized cells group, the adjacent sub-district that RSCP is the strongest;
The timing information that described pretreatment unit obtains the synchronized cells group is specially: with the timing information of the adjacent sub-district that RSCP is the strongest in the described synchronized cells group, as the timing information of synchronized cells group.
9. as each described measurement mechanism of claim 6～8, it is characterized in that, described main control unit further comprises: first judge module, this all obtains the RSCP value to be used to judge whether all interior sub-districts of described synchronized cells group, as still there being this not obtain the adjacent sub-district of RSCP value, then notify described arithmetic element; And
Second judge module is used to judge whether this RSCP measurement of all synchronized cells groups, as this still being arranged without the cell set that RSCP measures, selects described cell set without the RSCP measurement, and notifies described data buffer storage unit.
10. measurement mechanism as claimed in claim 9 is characterized in that described post-processing unit is further used for, and this acquired adjacent sub-district RSCP in the described synchronized cells group is arranged by strong and weak, and will put in order and notify described main control unit; Described first judge module notifies described arithmetic element to be, by strong adjacent sub-district to weak selection some, in described synchronized cells group this do not obtain the adjacent sub-district of RSCP and notifies described arithmetic element, make described arithmetic element not obtain the adjacent sub-district of RSCP, do many sub-districts Parallel Interference Cancellation and channel estimating the adjacent sub-district and described this of described selection.
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Effective date of registration: 20151112 Address after: Dameisha Yantian District of Shenzhen City, Guangdong province 518085 Building No. 1 Patentee after: SHENZHEN ZTE MICROELECTRONICS TECHNOLOGY CO., LTD. Address before: 518057 Nanshan District Guangdong high tech Industrial Park, South Road, science and technology, ZTE building, Ministry of Justice Patentee before: ZTE Corporation |
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Application publication date: 20110727 Assignee: Xi'an Chris Semiconductor Technology Co. Ltd. Assignor: SHENZHEN ZTE MICROELECTRONICS TECHNOLOGY CO., LTD. Contract record no.: 2019440020036 Denomination of invention: Method and device for measuring RSCP (received signal code power) of adjacent cells Granted publication date: 20141231 License type: Common License Record date: 20190619 |