CN101883379A - Method for realizing two-phase measuring optimization of wireless terminal adjacent subdistricts in wireless communication system - Google Patents
Method for realizing two-phase measuring optimization of wireless terminal adjacent subdistricts in wireless communication system Download PDFInfo
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Abstract
The invention relates to a method for realizing two-phase measuring optimization of wireless terminal adjacent subdistricts in a wireless communication system, comprising the following steps: acquiring an adjacent subdistrict list by a wireless terminal, storing based on different frequent points, performing time slot synchronous treatment on pilot frequency adjacent subdistricts in the adjacent subdistrict list, acquiring a time slot synchronous treatment result, storing the time slot position information of which the peak value is larger than a preset threshold value of the system, merging time slots by a preset search window of the system, acquiring a merged and converted time slot amount, acquiring down primary scrambling codes and the amount of the down primary scrambling codes in the pilot frequency adjacent subdistricts in the adjacent subdistrict list, measuring based on the above information and storing the measuring result. By adopting the method for realizing two-phase measuring optimization of wireless terminal adjacent subdistricts in a wireless communication system, the search and measurement times can be greatly reduced, the system running efficiency is high, the work performance is stable and reliable, and the application range is wide, thus laying a solid foundation for further development of adjacent subdistrict search technology of the wireless terminal.
Description
Technical field
The present invention relates to wireless communication field, particularly wireless terminal adjacent cell measurement technical field is meant that specifically a kind of wireless communication system realizes the method for the adjacent sub-district of wireless terminal two-phase measuring optimization.
Background technology
In current wireless communication system, wireless terminal in the access to wireless communication network (UE) is behind normal boot-strap, detect the information of neighbor cell probably as required, for example for the information of safeguarding alien-frequency district, prepare for direct-cut operation etc. the iso-frequency adjacent community in the neighbor cell measured.In this case, the descending main scrambling code that uses of iso-frequency adjacent community often system broadcast information by Serving cell provide.
At this moment, the iso-frequency adjacent community search procedure can be reduced to following two stages:
Phase I---slot synchronization process: for all sub-districts, the first synchronous code (PSC) that first synchronizing channel P-SCH uses all is identical, UE is easy to find the stronger sub-district of certain signal by a matched filter, and can determine the position of its time slot starting point so just to have finished slot synchronization.
Second stage---do not use secondary synchronization code (SSC), and be to use P-CPICH to finish frame synchronizing process.UE uses 38400 chips (known) of P-CPICH to finish the search of frame synchronization.Because the slot synchronization of sub-district is known, so UE is as long as in 15 continuous at most time slots, just can find the original position of descending pilot frequency frame.
In the specific implementation of prior art, because descending main scrambling code is known, generally the time slot position that is obtained in the phase I can be put in 15 time slots and searches for, thereby find the original position of descending pilot frequency frame.But owing to tend to occur several time slot positions in the phase I, make second stage repeatedly to search for, so just increased computing and treating capacity greatly, influenced the operational efficiency of system, cause system resources consumption to increase.
Summary of the invention
The objective of the invention is to have overcome above-mentioned shortcoming of the prior art, provide a kind of and can effectively reduce number of times that search measures, guarantee, stable and reliable working performance higher, the scope of application to search, the running efficiency of system of the original position of descending pilot frequency frame comparatively widely wireless communication system realize the method for the adjacent sub-district of wireless terminal two-phase measuring optimization.
In order to realize above-mentioned purpose, wireless communication system of the present invention realizes that the method for the adjacent sub-district of wireless terminal two-phase measuring optimization is as follows:
Realize the method for the adjacent sub-district of wireless terminal two-phase measuring optimization in this wireless communication system, its main feature is that described method may further comprise the steps:
(1) wireless terminal obtains adjacent cell list, and stores according to different frequent points;
(2) wireless terminal carries out the slot synchronization processing of iso-frequency adjacent community in the adjacent cell list;
(3) wireless terminal obtains the result that slot synchronization is handled, and peak value is stored greater than the time slot position information of the threshold value of systemic presupposition;
(4) wireless terminal carries out the time slot merger to the time slot position information of storage according to the search window of systemic presupposition and handles, and obtains the time slot sum after merger transforms;
(5) wireless terminal carries out the processing of obtaining of the descending main scrambling code of iso-frequency adjacent community in the adjacent cell list and this descending main scrambling code sum;
(6) wireless terminal is measured processing according to descending main scrambling code, time slot position information and the time slot sum of whole iso-frequency adjacent communities in the adjacent cell list, and measurement result is stored.
Time slot position information in this wireless communication system in the method for the adjacent sub-district of realization wireless terminal two-phase measuring optimization comprises time slot position energy value and time slot position.
The time slot merger of carrying out in this wireless communication system in the method for the adjacent sub-district of realization wireless terminal two-phase measuring optimization is handled, and may further comprise the steps:
(11) in time slot position information, find the maximum pairing time slot position of time slot position energy value, and be the center with this time slot position, search window according to systemic presupposition is of a size of size, and this time slot position is gone in other time slot position merger that falls in this search window;
(12) remaining time slot position information is sorted by time slot position energy value again, repeat above-mentioned steps (11), the interval between all time slot positions is greater than the size of described search window;
(13) the time slot sum after current all time slot position sum is transformed as merger returns.
Realize the processing of obtaining of the descending main scrambling code that carries out iso-frequency adjacent community in the adjacent cell list in the method for the adjacent sub-district of wireless terminal two-phase measuring optimization and this descending main scrambling code sum in this wireless communication system, be specially:
Compare by frequency point information, thereby obtain descending main scrambling code and this descending main scrambling code sum of iso-frequency adjacent community in the adjacent cell list frequency point information in the adjacent cell list and Serving cell.
Descending main scrambling code, time slot position information and time slot sum according to whole iso-frequency adjacent communities in the adjacent cell list in this wireless communication system in the method for the adjacent sub-district of realization wireless terminal two-phase measuring optimization are measured processing, may further comprise the steps:
(21) judge that the iso-frequency adjacent community number searched for is whether identical with iso-frequency adjacent community descending main scrambling code sum in the adjacent cell list;
(22) if identical, then the iso-frequency adjacent community in the adjacent cell list has all been searched for and has been finished, and finishes this processing;
(23) if inequality, judge then whether the number of time slots of having searched for is identical with described time slot sum;
(24) if identical, the iso-frequency adjacent community number that then will search for increases by 1, and returns step (21);
(25) if inequality, judge that then number of time slots in the current frame of having searched for is whether identical with time slot sum in the frame;
(26) if identical, then in 15 continuous time slots, finished search, the number of time slots of having searched for has been increased by 1, and return step (23) with the pairing time slot of the descending main scrambling code of current iso-frequency adjacent community;
(27) if inequality, then, change according to following formula according to time slot corresponding in the descending main scrambling code of the current iso-frequency adjacent community of searching for, the time slot position of searching for and the frame searched for:
Chip number in the original position of downlink pilot frequency channel=(the chip number in time slot position+frame in time slot ordinal number * one time slot) frame of %;
Wherein, % is a modulo operation;
And measure the energy value of the descending main scrambling code of the current iso-frequency adjacent community of searching for;
(28) if the energy value of descending main scrambling code of measuring the current iso-frequency adjacent community of searching for obtained greater than the energy threshold value of systemic presupposition, then this descending main scrambling code, the original position of measuring the downlink pilot frequency channel that is obtained, the energy value and the frequency points corresponding information of this descending main scrambling code are stored, and, return step (25) with number of time slots increase by 1 in the current frame of having searched for.
Chip number in the time slot in this wireless communication system in the method for the adjacent sub-district of realization wireless terminal two-phase measuring optimization is 2560.
Chip number in the frame in this wireless communication system in the method for the adjacent sub-district of realization wireless terminal two-phase measuring optimization is 38400.
Adopted the method for the adjacent sub-district of the wireless communication system realization wireless terminal two-phase measuring optimization of this invention, because wherein the processing mode that transforms by merger has effectively reduced the time slot position that is obtained in the search procedure of phase I, thereby the number of times that second stage is searched for reduces significantly, and can not influence search to the original position of downlink pilot frequency channel, can either effectively reduce the number of times that search is measured, guaranteed search again to the original position of descending pilot frequency frame, running efficiency of system is higher, stable and reliable working performance, the scope of application is comparatively extensive, for the further developing of adjacent Cell searching technology of wireless terminal established solid foundation.
Description of drawings
Fig. 1 is the overall flow schematic diagram that wireless communication system of the present invention is realized the method for the adjacent sub-district of wireless terminal two-phase measuring optimization.
Fig. 2 is that wireless communication system of the present invention is realized time slot merger handling principle schematic diagram in the method for the adjacent sub-district of wireless terminal two-phase measuring optimization.
Embodiment
In order more to be expressly understood technology contents of the present invention, describe in detail especially exemplified by following examples.
See also illustrated in figures 1 and 2ly, realize the method for the adjacent sub-district of wireless terminal two-phase measuring optimization in this wireless communication system, comprising following steps:
(1) wireless terminal obtains adjacent cell list, and stores according to different frequent points;
(2) wireless terminal carries out the slot synchronization processing of iso-frequency adjacent community in the adjacent cell list;
(3) wireless terminal obtains the result that slot synchronization is handled, and peak value is stored greater than the time slot position information of the threshold value of systemic presupposition; This time slot position information comprises time slot position energy value and time slot position;
(4) wireless terminal carries out the time slot merger to the time slot position information of storage according to the search window of systemic presupposition and handles, and obtains the time slot sum after merger transforms; This time slot merger is handled, and may further comprise the steps:
(a) in time slot position information, find the maximum pairing time slot position of time slot position energy value, and be the center with this time slot position, search window according to systemic presupposition is of a size of size, and this time slot position is gone in other time slot position merger that falls in this search window;
(b) remaining time slot position information is sorted by time slot position energy value again, repeat above-mentioned steps (11), the interval between all time slot positions is greater than the size of described search window;
(c) the time slot sum after current all time slot position sum is transformed as merger returns;
(5) wireless terminal carries out the processing of obtaining of the descending main scrambling code of iso-frequency adjacent community in the adjacent cell list and this descending main scrambling code sum, is specially:
Compare by frequency point information, thereby obtain descending main scrambling code and this descending main scrambling code sum of iso-frequency adjacent community in the adjacent cell list frequency point information in the adjacent cell list and Serving cell;
(6) wireless terminal is measured processing according to descending main scrambling code, time slot position information and the time slot sum of whole iso-frequency adjacent communities in the adjacent cell list, and measurement result is stored, and may further comprise the steps:
(a) judge that the iso-frequency adjacent community number searched for is whether identical with iso-frequency adjacent community descending main scrambling code sum in the adjacent cell list;
(b) if identical, then the iso-frequency adjacent community in the adjacent cell list has all been searched for and has been finished, and finishes this processing;
(c) if inequality, judge then whether the number of time slots of having searched for is identical with described time slot sum;
(d) if identical, the iso-frequency adjacent community number that then will search for increases by 1, and returns step (a);
(e) if inequality, judge that then number of time slots in the current frame of having searched for is whether identical with time slot sum in the frame;
(f) if identical, then in 15 continuous time slots, finished search, the number of time slots of having searched for has been increased by 1, and return step (c) with the pairing time slot of the descending main scrambling code of current iso-frequency adjacent community;
(g) if inequality, then, change according to following formula according to time slot corresponding in the descending main scrambling code of the current iso-frequency adjacent community of searching for, the time slot position of searching for and the frame searched for:
Chip number in the original position of downlink pilot frequency channel=(the chip number in time slot position+frame in time slot ordinal number * one time slot) frame of %;
Wherein, % is a modulo operation; Chip number in this time slot is 2560; Chip number in this frame is 38400;
And measure the energy value of the descending main scrambling code of the current iso-frequency adjacent community of searching for;
(h) if the energy value of descending main scrambling code of measuring the current iso-frequency adjacent community of searching for obtained greater than the energy threshold value of systemic presupposition, then this descending main scrambling code, the original position of measuring the downlink pilot frequency channel that is obtained, the energy value and the frequency points corresponding information of this descending main scrambling code are stored, and, return step (e) with number of time slots increase by 1 in the current frame of having searched for.
In the middle of reality is used, at first introduce the concrete implication of each parameter:
● PeakEnergy measures the level value that obtains time slot position the phase I
● PeakLocation measures to obtain time slot position the phase I
● PeakNum measures to obtain number of time slots the phase I
● NumPeak refers to current which time slot, and initial value is 0
● ListNum is the number that requires the alien-frequency district descending main scrambling code measured
● NumList refers to the descending main scrambling code of current which alien-frequency district, and initial value is 0
● NumSlot refers to which time slot in the current search frame, and initial value is 0
● SLOTNUM is the number 15 of time slot in the frame
● SearchLocation is the original position that second stage records downlink pilot frequency channel
● SearchEnergy is alien-frequency district descending main scrambling code (PGC) level value that second stage records
● the descending main scrambling code of PGC for from adjacent cell list, obtaining
● CHIP_PER_SLOT is the chip number 2560 in the time slot
● CHIP_PER_FRAME is the chip number 38400 in the frame
The present invention is implemented as follows:
(1) at first, obtain adjacent cell list, and store according to different frequent points.
(2) to the following processing of carrying out of phase I measurement result:
Step 1---obtain the result of slot synchronization, peak value is stored greater than the content of the time slot position of threshold value, comprise this time slot position energy value (PeakEnergy) and time slot position (PeakLocation).
Step 2---find the time slot of energy maximum,, the time slot position in the front and back WinSize/2 window of this time slot is all thought this time slot position according to the window size (WinSize) of second stage search.
Step 3---will search for all the other time slots that obtain and sort again, and find out the time slot of energy value maximum, repeating step two by energy value.And so forth, up to all time slots are classified as the time slot that belongs to different windows, and obtain through the number of time slots (PeakNum) after the above process.
(3) processing that second stage is measured:
The descending main scrambling code that step 1---neighbor cell uses system broadcast information by Serving cell often provides, so the frequency by frequency point information in the neighbor cell and Serving cell compares PGC and the number (ListNum) thereof that just can obtain alien-frequency district in the adjacent cell list, obtain the result of phase I search, comprise time slot energy (PeakEnergy), time slot position (PeakLocation) and number of time slots (PeakNum).
Step 2---relatively whether alien-frequency district descending main scrambling code number ListNum is identical with the alien-frequency district number (NumList) of having searched in the adjacent cell list, if identical then finish this search, reported result.If it is unequal then carry out step 3.
Step 3---relatively whether the number of time slots (PeakNum) of the measurement result of phase I is identical with current number of time slots of having searched for (NumPeak).If identical, then measure the descending main scrambling code of next alien-frequency district and the number (NumList) of the alien-frequency district that will search for and add 1, and carry out above-mentioned steps two, otherwise execution in step four.
Whether step 4---number of time slots (Numslot) in the more current frame of having searched for equals the number of time slots (SLOTNUM) in the frame, in continuous 15 time slots, finish search if equate then represent with the descending main scrambling code time slot corresponding of current alien-frequency district, the number of time slots (NumPeak) of having finished search adds 1, and carry out above-mentioned steps three, otherwise execution in step five.
Step 5---according to current NumList descending main scrambling code of the alien-frequency district of searching for, Numslot time slot in NumPeak time slot of searching for and the frame of searching for, select corresponding downstream master's scrambler (PGC), time slot position (PeakLocation), carry out following formula one pairing conversion back and measure.
The measurement result of step 6---obtaining step five, if the energy value that obtains is greater than thresholding, then with corresponding descending main scrambling code (PGC), the original position (SearchLocation) of the descending pilot frequency frame that obtains and energy value (SearchEnergy) and the frequency point information of this moment are stored.And so forth, all or part of descending main scrambling code measurement of alien-frequency district is finished in adjacent cell list.
Below in conjunction with Fig. 1 and Fig. 2 PGC in 2 adjacent cell lists being carried out 2 phase measurings is that example describes:
(1) at first carrying out the phase I and measure, and obtain the measurement result of phase I, comprise energy (PeakEnergy), time slot position (PeakLocation) and the number of time slots (PeakNum) of time slot, is 8 as the original PeakNum among Fig. 2;
(2) in measurement result, find the maximum time slot of energy (PeakEnergy), and be the center with the position (PeakLocation) of this time slot according to the search window value (WinSize) of second stage design, with the search window size is size, and the time slot that the search in the window is obtained is classified as a time slot.The time slot that remaining search obtains is as above operated.The size of the interval great-than search window between the time slot that draws at last.Seeing also shown in Figure 2ly, is 2 through the number of time slots (PeakNum) after transforming wherein;
(3) obtain the descending main scrambling code (PGC) and the number (ListNum) thereof of alien-frequency district in the adjacent cell list, obtain the result of phase I search, comprise time slot energy (PeakEnergy), time slot position (PeakLocation) and number of time slots (PeakNum);
(4) judge whether alien-frequency district has been searched in the adjacent cell list, i.e. (whether NumList equals ListNum); If do not searched for, then carry out next step, otherwise finish this time to measure and the reporting measurement result;
(5) whether the time slot of determining step one search acquisition has all searched for i.e. (whether NumPeak equals PeakNum); If do not searched for, then carry out step (6).Otherwise measure next alien-frequency district (NumList++);
(6) judge whether to finish in 15 time slots of current time slots in frame and search for i.e. (whether NumSlot equals SLOTNUM).If do not searched for, then according to current NumList, NumPeak and Numslot obtain corresponding PGC, and search for obtaining two-stage searching position SearchBegin after the following formula conversion of PeakLocation process:
SearchBegin＝(PeakLocation+Numslot×CHIP_PER_SLOT)％CHIP_PER_FRAME；
And time slot (Numslot++) in the next frame of preparation search.If search is finished, then prepare a next stage of search search for time slot (NumPeak++).
(7) measurement result of obtaining step (6), if the energy value that search obtains is greater than thresholding, then the original position (SearchLocation) of corresponding main scrambler (PGC), the descending pilot frequency frame that obtains and energy (SearchEnergy) and frequency point information are at this moment stored.So repeatedly, the alien-frequency district measurement in adjacent cell list finishes.
Adopted above-mentioned wireless communication system to realize the method for the adjacent sub-district of wireless terminal two-phase measuring optimization, because wherein the processing mode that transforms by merger has effectively reduced the time slot position that is obtained in the search procedure of phase I, thereby the number of times that second stage is searched for reduces significantly, and can not influence search to the original position of downlink pilot frequency channel, can either effectively reduce the number of times that search is measured, guaranteed search again to the original position of descending pilot frequency frame, running efficiency of system is higher, stable and reliable working performance, the scope of application is comparatively extensive, for the further developing of adjacent Cell searching technology of wireless terminal established solid foundation.
In this specification, the present invention is described with reference to its certain embodiments.But, still can make various modifications and conversion obviously and not deviate from the spirit and scope of the present invention.Therefore, specification and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (7)
1. realize the method for the adjacent sub-district of wireless terminal two-phase measuring optimization in the wireless communication system, it is characterized in that described method may further comprise the steps:
(1) wireless terminal obtains adjacent cell list, and stores according to different frequent points;
(2) wireless terminal carries out the slot synchronization processing of iso-frequency adjacent community in the adjacent cell list;
(3) wireless terminal obtains the result that slot synchronization is handled, and peak value is stored greater than the time slot position information of the threshold value of systemic presupposition;
(4) wireless terminal carries out the time slot merger to the time slot position information of storage according to the search window of systemic presupposition and handles, and obtains the time slot sum after merger transforms;
(5) wireless terminal carries out the processing of obtaining of the descending main scrambling code of iso-frequency adjacent community in the adjacent cell list and this descending main scrambling code sum;
(6) wireless terminal is measured processing according to descending main scrambling code, time slot position information and the time slot sum of whole iso-frequency adjacent communities in the adjacent cell list, and measurement result is stored.
2. realize the method for the adjacent sub-district of wireless terminal two-phase measuring optimization in the wireless communication system according to claim 1, it is characterized in that described time slot position information comprises time slot position energy value and time slot position.
3. realize the method for the adjacent sub-district of wireless terminal two-phase measuring optimization in the wireless communication system according to claim 2, it is characterized in that, describedly carry out the time slot merger and handle, may further comprise the steps:
(11) in time slot position information, find the maximum pairing time slot position of time slot position energy value, and be the center with this time slot position, search window according to systemic presupposition is of a size of size, and this time slot position is gone in other time slot position merger that falls in this search window;
(12) remaining time slot position information is sorted by time slot position energy value again, repeat above-mentioned steps (11), the interval between all time slot positions is greater than the size of described search window;
(13) the time slot sum after current all time slot position sum is transformed as merger returns.
4. realize the method for the adjacent sub-district of wireless terminal two-phase measuring optimization in the wireless communication system according to claim 1, it is characterized in that, the described descending main scrambling code that carries out iso-frequency adjacent community in the adjacent cell list and this descending main scrambling code sum obtain processing, be specially:
Compare by frequency point information, thereby obtain descending main scrambling code and this descending main scrambling code sum of iso-frequency adjacent community in the adjacent cell list frequency point information in the adjacent cell list and Serving cell.
5. realize the method for the adjacent sub-district of wireless terminal two-phase measuring optimization in the wireless communication system according to claim 1, it is characterized in that, described descending main scrambling code, time slot position information and time slot sum according to whole iso-frequency adjacent communities in the adjacent cell list measured processing, may further comprise the steps:
(21) judge that the iso-frequency adjacent community number searched for is whether identical with iso-frequency adjacent community descending main scrambling code sum in the adjacent cell list;
(22) if identical, then the iso-frequency adjacent community in the adjacent cell list has all been searched for and has been finished, and finishes this processing;
(23) if inequality, judge then whether the number of time slots of having searched for is identical with described time slot sum;
(24) if identical, the iso-frequency adjacent community number that then will search for increases by 1, and returns step (21);
(25) if inequality, judge that then number of time slots in the current frame of having searched for is whether identical with time slot sum in the frame;
(26) if identical, then in 15 continuous time slots, finished search, the number of time slots of having searched for has been increased by 1, and return step (23) with the pairing time slot of the descending main scrambling code of current iso-frequency adjacent community;
(27) if inequality, then, change according to following formula according to time slot corresponding in the descending main scrambling code of the current iso-frequency adjacent community of searching for, the time slot position of searching for and the frame searched for:
Chip number in the original position of downlink pilot frequency channel=(the chip number in time slot position+frame in time slot ordinal number * one time slot) frame of %;
Wherein, % is a modulo operation;
And measure the energy value of the descending main scrambling code of the current iso-frequency adjacent community of searching for;
(28) if the energy value of descending main scrambling code of measuring the current iso-frequency adjacent community of searching for obtained greater than the energy threshold value of systemic presupposition, then this descending main scrambling code, the original position of measuring the downlink pilot frequency channel that is obtained, the energy value and the frequency points corresponding information of this descending main scrambling code are stored, and, return step (25) with number of time slots increase by 1 in the current frame of having searched for.
6. realize the method for the adjacent sub-district of wireless terminal two-phase measuring optimization in the wireless communication system according to claim 5, it is characterized in that the chip number in the described time slot is 2560.
7. realize the method for the adjacent sub-district of wireless terminal two-phase measuring optimization in the wireless communication system according to claim 6, it is characterized in that the chip number in the described frame is 38400.
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| DE602006021407D1 (en) * | 2005-08-24 | 2011-06-01 | Huawei Tech Co Ltd | MEASURING METHOD, METHOD FOR DETERMINING MEASUREMENT CAPACITY REQUIREMENTS AND SELECTION OF SERVICE CELLS AND DEVICE THEREFOR |
| CN1988414B (en) * | 2005-12-22 | 2010-05-05 | 联芯科技有限公司 | Method for catching GSM adjacent small area synchronous channel and base station identification code reaffirming method |
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| BRPI0807058A2 (en) * | 2007-02-05 | 2020-08-11 | Telefonaktiebolaget Lm Ericsson [Publ] | methods for configuring user equipment on a radio base station of a telecommunication network and for performing downlink measurements on one or more cells on a user equipment, radio base station of a mobile telecommunication network, and, equipment over a mobile telecommunication network |
| CN101072438B (en) * | 2007-06-15 | 2010-09-29 | 中兴通讯股份有限公司 | Initial cell searching method for TD-SCDMA system mobile terminal |
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| CN110312288B (en) * | 2018-03-27 | 2021-11-19 | 展讯通信（上海）有限公司 | Method and device for processing continuous search of same-frequency cells and user equipment |
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