CN102056127A - Method for selecting same-frequency interference cell list on TDD UE side - Google Patents
Method for selecting same-frequency interference cell list on TDD UE side Download PDFInfo
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Abstract
The invention relates to a method for selecting a same-frequency interference cell list on a time division duplex user equipment (TDD UE) side. The method comprises the following steps of: generating initial same-frequency interference cell lists according to same-frequency measurement, different-frequency measurement and self-measurement results; updating the initial same-frequency interference cell lists according to same-frequency and different-frequency measurement periods; sequencing the initial same-frequency interference cell lists according to received signal code power (RSCP) measurement results, and preferably selecting the maximum same-frequency interference cell, wherein the measurement is easy to confuse with the previous measurement; selecting and configuring detection cell lists from the initial same-frequency interference cell lists in turn by using the UE; calculating an RSCP measurement value according to received service time slot data; and screening an effective interference cell which meets a set threshold.. The method can effectively acquire a practically effective same-frequency interference cell list aiming at different time slots, and can remove the influence of error interference cell configuration on a same-frequency interference elimination algorithm module.
Description
Technical field
The invention belongs to the mobile communication technology field, relate in particular to a kind of 3GPP LCR-TDD/3.84McpsTDD/7.68Mcps TDD UE side co-channel interference and eliminate the processing realization
Background technology
According to the relevant N frequency point co-frequency of 3GPP networking agreement, in the TD-SCDMA system, introduced the characteristic of N frequency with CCSA.Be a plurality of carrier frequency of each cell configuration, wherein, carrying P-CCPCH's is main carrier frequency, and the carrier frequency that does not carry P-CCPCH is an assistant carrier frequency.A N frequency point cell can dispose a main carrier frequency, a N-1 assistant carrier frequency.
With the 3 frequency point co-frequency networkings of 5M bandwidth is example, for maximum possible improves power system capacity, and each a N frequency point cell main carrier frequency of configuration and 2 assistant carrier frequencies.Networking sub-district example is as follows:
Sub-district A: dominant frequency point 10054, auxilliary frequency 10062 and 10078
Sub-district B: dominant frequency point 10062, auxilliary frequency 10054 and 10078
Sub-district C: dominant frequency point 10078, auxilliary frequency 10054 and 10062
User's persistent district and traffic resource assignment example are as follows:
User UA: persistent district A, business frequency are dominant frequency point 10054, and business time-slot is TS2-3
User UB: persistent district B, business frequency are auxilliary frequency 10054, and business time-slot is TS2-4
User UC: persistent district C, business frequency are auxilliary frequency 10054, and business time-slot is TS2-5
According to above-mentioned example, can draw as drawing a conclusion:
● at user UA, on TS2, its inter-frequency interference cell comprises sub-district B and C.This shows that inter-frequency interference cell comes from all sub-districts under all frequencies in the N frequency point co-frequency networking lower area.
● at user UB, on TS4, its inter-frequency interference cell has only sub-district C, because sub-district A does not have traffic assignments on TS4.Therefore be not on detected all sub-districts, all to have co-channel interference really at certain particular time-slot according to measurement result.
In addition, under than complicated N frequency point networking, may have a plurality of sub-districts under each frequency, this moment, the network side configuration existed inaccuracy and non real-time with frequency and different-frequency measure cell list.If only adopt and select the sub-district with frequency and different-frequency measure result, cause the inter-frequency interference cell omission easily, have a strong impact on receptivity.
Summary of the invention
The scheme that the present invention proposes can obtain inter-frequency interference cell tabulation accurately fast, to improve UE side receiver performance under the N frequency point co-frequency networking model.Eliminate to reduce co-channel interference, and then can improve power system capacity.
Technical scheme of the present invention is that a kind of TDD UE side is selected the method for inter-frequency interference cell tabulation, it is characterized in that, may further comprise the steps:
A1 produces initial inter-frequency interference cell tabulation according to common frequency measurement, different-frequency measure and self check measurement result, and according to upgrade this initial inter-frequency interference cell tabulation with frequency and different-frequency measure cycle;
A2 sorts preferred maximum inter-frequency interference cell according to the RSCP measurement result to described initial inter-frequency interference cell tabulation;
A3, described UE selects the configuration detection cell list successively from aforementioned initial inter-frequency interference cell tabulation, satisfy effective interfered cell of setting thresholding according to receiving business time-slot data computation RSCP measured value, filtering out;
A4, described UE is for the testing process of each time slot repeating step A3 of TS2 to TS6 time slot;
A5, described UE sorts according to described RSCP measured value and described setting thresholding for described effective interfered cell, selects maximum N effectively interfered cell, and N is default value here.
In the said method, at the TS0 time slot, described inter-frequency interference cell tabulation can be directly from the dominant frequency measurement result, and its efficient cell tabulation can be selected co-frequency cell measurement result under the dominant frequency from described initial cell tabulation, and ordering obtains preferred inter-frequency interference cell tabulation according to the RSCP measured value.
The inter-frequency interference cell detection method that the present invention proposes can effectively be obtained at actual effectively inter-frequency interference cell tabulation on the different time-gap, can remove the influence of wrong interfered cell configuration to co-channel interference elimination algorithm module.Can select simultaneously the maximum inter-frequency interference cell of power accurately, improve co-channel interference cancellation module performance.
Description of drawings
Fig. 1 is that the inter-frequency interference cell at the TS2-TS6 time slot is selected the processing method schematic diagram in one embodiment of the invention
Embodiment
Below be further specifying for the specific embodiment of the present invention in conjunction with the accompanying drawings.
The present invention is the method that a kind of TDD UE side is selected the inter-frequency interference cell tabulation, may further comprise the steps:
A1 produces initial inter-frequency interference cell tabulation according to common frequency measurement, different-frequency measure and self check measurement result, and according to upgrade this initial inter-frequency interference cell tabulation with frequency and different-frequency measure cycle;
A2 sorts preferred maximum inter-frequency interference cell according to the RSCP measurement result to described initial inter-frequency interference cell tabulation;
A3, described UE selects the configuration detection cell list successively from aforementioned initial inter-frequency interference cell tabulation, satisfy effective interfered cell of setting thresholding according to receiving business time-slot data computation RSCP measured value, filtering out;
A4, described UE is for the testing process of each time slot repeating step A3 of TS2 to TS6 time slot;
A5, described UE sorts according to described RSCP measured value and described setting thresholding for described effective interfered cell, selects maximum N effectively interfered cell, and N is default value here.
At the TS2-6 time slot, its inter-frequency interference cell may come from all sub-districts under all frequencies in the N frequency point co-frequency networking lower area, so selection more complicated of its inter-frequency interference cell, mainly contain following step: the first step is the renewal of initial inter-frequency interference cell tabulation, and this step can at utmost detect the inter-frequency interference cell tabulation that may exist.This step is mainly obtained cell list from the following aspects:
● under N frequency point co-frequency networking model, inter-frequency interference cell may come from all sub-districts under all frequencies in the N frequency point co-frequency networking lower area, therefore must produce initial inter-frequency interference cell tabulation according to common frequency measurement and different-frequency measure result, and according to upgrading with frequency and different-frequency measure cycle.
● because the network side configuration exists uncertain and non real-time with frequency and different-frequency measure cell list, therefore UE need be on the measurement frequency of network side configuration but not the self check of UE side is carried out in other sub-district of measuring in the cell list, detect not other interfered cell that meets certain thresholding in the network side configured list, add initial inter-frequency interference cell tabulation.It is suitable for the overhaul period to set, and upgrades initial inter-frequency interference cell tabulation.
● the initial inter-frequency interference cell tabulation that above two parts produce is sorted according to the RSCP measurement result, can guarantee the maximum inter-frequency interference cell that preferential selection may exist like this.
Second step was to measure feedback according to the co-channel interference cancellation module further to filter.The selection of the inter-frequency interference cell tabulation that previous step produces is based on the measurement result that the TS0 signal carries out, but at each time slot among the TS2-6, some sub-district may exist customer service to distribute, and also may not exist, and therefore must filter selection according to closed loop feedback.This step mainly contains the following aspects:
● select for cooperating this closed loop feedback, co-channel interference is eliminated need comprise a measuring ability module, is used for sub-district calculating RSCP or sir measurement value to the detected cells tabulation of configuration.
● UE at first selects the tabulation of cell configuration detected cells successively from the initial cell tabulation, then according to the feedback of co-channel interference cancellation module RSCP measured value, further filter out the effective interfered cell that satisfies certain thresholding.The co-channel interference cancellation module can obtain accurately at the effective co-frequency cell of this time slot like this.
● UE need carry out above testing process to each time slot in the TS2-6 that distributes.
● UE may select the sub-district too much according to the feedback of co-channel interference cancellation module RSCP measured value according to certain thresholding, and need sort this moment according to the RSCP measured value, to select maximum N effectively interfered cell.
At the TS0 time slot, according to only having the dominant frequency signal at the TS0 time slot under the N frequency point co-frequency networking model, so its inter-frequency interference cell tabulation can be directly from the dominant frequency measurement result.Its efficient cell tabulation can be selected co-frequency cell measurement result under the dominant frequency from the initial cell tabulation, ordering obtains preferred co-frequency cell tabulation according to the RSCP measured value.Above method schematic diagram such as Fig. 1.
The inter-frequency interference cell detection method that the present invention proposes can effectively overcome the above problems, and selects inter-frequency interference cell tabulation accurately fast, eliminates effect thereby can improve descending co-channel interference greatly, improves UE side receiver performance.
Claims (2)
1. the method that TDD UE side selects inter-frequency interference cell to tabulate is characterized in that, may further comprise the steps:
A1 produces initial inter-frequency interference cell tabulation according to common frequency measurement, different-frequency measure and self check measurement result, and according to upgrade this initial inter-frequency interference cell tabulation with frequency and different-frequency measure cycle;
A2 sorts preferred maximum inter-frequency interference cell according to the RSCP measurement result to described initial inter-frequency interference cell tabulation;
A3, described UE selects the configuration detection cell list successively from aforementioned initial inter-frequency interference cell tabulation, satisfy effective interfered cell of setting thresholding according to receiving business time-slot data computation RSCP measured value, filtering out;
A4, described UE is for the testing process of each time slot repeating step A3 of TS2 to TS6 time slot;
A5, described UE sorts according to described RSCP measured value and described setting thresholding for described effective interfered cell, selects maximum N effectively interfered cell, and N is default value here.
2. TDD UE side is selected the method for inter-frequency interference cell tabulation according to claim 1, it is characterized in that, at the TS0 time slot, described inter-frequency interference cell tabulation can be directly from the dominant frequency measurement result, its efficient cell tabulation can be selected co-frequency cell measurement result under the dominant frequency from described initial cell tabulation, ordering obtains preferred inter-frequency interference cell tabulation according to the RSCP measured value.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103428872A (en) * | 2012-05-15 | 2013-12-04 | 马维尔国际有限公司 | Method and apparatus for eliminating co-channel interference |
| CN103686771A (en) * | 2012-09-20 | 2014-03-26 | 中兴通讯股份有限公司 | Same frequency interference cell configuration device, method and terminal |
| CN104348565A (en) * | 2013-07-29 | 2015-02-11 | 意法-爱立信有限公司 | Interference community detection method and user equipment |
| CN104469815A (en) * | 2013-09-13 | 2015-03-25 | 上海贝尔股份有限公司 | Method for triggering network assisted interference cancellation and suppression and user equipment |
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| CN101217801A (en) * | 2008-01-08 | 2008-07-09 | 北京天碁科技有限公司 | A same frequency interference selection method applied in N frequency point networking system |
| CN101237707A (en) * | 2008-03-06 | 2008-08-06 | 北京天碁科技有限公司 | A method for detection inter-frequency interference cell in reselection or switching |
| CN101237708A (en) * | 2008-03-06 | 2008-08-06 | 北京天碁科技有限公司 | Method for initializing and updating inter-frequency interference cell of TD-SCDMA terminal |
| CN101500215A (en) * | 2008-01-28 | 2009-08-05 | 大唐移动通信设备有限公司 | Adjacent cell list configuring method and apparatus in multi-frequency system |
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Patent Citations (4)
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| CN101217801A (en) * | 2008-01-08 | 2008-07-09 | 北京天碁科技有限公司 | A same frequency interference selection method applied in N frequency point networking system |
| CN101500215A (en) * | 2008-01-28 | 2009-08-05 | 大唐移动通信设备有限公司 | Adjacent cell list configuring method and apparatus in multi-frequency system |
| CN101237707A (en) * | 2008-03-06 | 2008-08-06 | 北京天碁科技有限公司 | A method for detection inter-frequency interference cell in reselection or switching |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103428872A (en) * | 2012-05-15 | 2013-12-04 | 马维尔国际有限公司 | Method and apparatus for eliminating co-channel interference |
| CN103686771A (en) * | 2012-09-20 | 2014-03-26 | 中兴通讯股份有限公司 | Same frequency interference cell configuration device, method and terminal |
| 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 |
| CN104348565A (en) * | 2013-07-29 | 2015-02-11 | 意法-爱立信有限公司 | Interference community detection method and user equipment |
| CN104348565B (en) * | 2013-07-29 | 2016-09-28 | 意法-爱立信有限公司 | Interfered cell detection method and subscriber equipment |
| CN104469815A (en) * | 2013-09-13 | 2015-03-25 | 上海贝尔股份有限公司 | Method for triggering network assisted interference cancellation and suppression and user equipment |
| CN104469815B (en) * | 2013-09-13 | 2019-04-05 | 上海诺基亚贝尔股份有限公司 | A kind of method and user equipment eliminated and inhibited for triggering network assistance interference |
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