CN1568038A - Method for wireless link deterioration detection and deterioration processing of TD-SCDMA system - Google Patents
Method for wireless link deterioration detection and deterioration processing of TD-SCDMA system Download PDFInfo
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Abstract
The invention relates to a wireless link deterioration checking and deterioration processing method of TD-SCDMA system. It includes: deterioration link processing and deterioration link recover checking and processing. The concrete process includes: checking the parameter that reflects the wireless link transmission quality in the current deterioration checking cycle, compared with the threshold of the setting parameter and judging the link met the link threshold condition to the deterioration link, setting link deterioration mark; processing the deterioration link using the HC module, DCA module, AMRC module and PS module, according to the priority and the invocation flag bit of HC module, DCA module, AMRC module and PS module and reconfiguring the resource of the deterioration link until deleting the deterioration link; taking the link transmission quality checking to the processed deterioration link, compared with the threshold of the setting parameter and recovering the link which meets the condition for resource distribution. The invention is suited to use in the wireless mobile communication system that coexists multilevel traffics and multilevel quality.
Description
Technical field
The present invention relates to mobile radio system, especially, the recovery technology after the present invention relates to Radio Link deterioration detection, the deterioration processing in TD SDMA (TD-SCDMA) mobile radio system and worsening processing.Use method described in the invention, can effectively improve the overall performance of mobile radio system, thereby improve the communication quality that user terminal obtains.
Background technology
Cause the reason that Radio Link worsens to have a lot.Deterioration detection to Radio Link in the mobile communications network then is one of important content of RRM with worsening processing.
When detecting the radio link quality deterioration, the way of taking usually is to reduce code rate etc., until interrupting telex network.
Traditional mobile radio networks only provides single speech business for the user usually, thereby also can only adopt single Radio Link to worsen and detect and the deterioration processing method, as the downlink gross power of only controlling the base station and uplink interference etc., therefore worsen and detect with to worsen the method for handling very simple for Radio Link.And traditional Radio Link worsens the reason that processing method does not judge that Radio Link worsens, and just according to a kind of fixing method, handles such as Poewr control method, can not reach best treatment effect.
In 3-G (Generation Three mobile communication system), network can provide multiple (level) business service for the user, and as voice, video, data etc., different business has different quality (QoS) requirement.Under the situation that this multi-service multimass requires, if still adopt single deterioration processing policy at different business, cordless communication network can't be given full play to its optimized performance so.
Summary of the invention
The Radio Link that the objective of the invention is to design a kind of TD-SCDMA system detects and worsens processing method, can be according to the different quality requirement of the different business that the user applied for, select different link degradation detection method, comparison threshold, take more effective deterioration processing method, worsen treatment effect thereby improve Radio Link.
The technical scheme that realizes the object of the invention is such: the Radio Link of a kind of TD-SCDMA system worsens and detects and worsen processing method, it is characterized in that comprising:
A. in current deterioration sense cycle, detect the parameter of reflection transmission of radio links quality, compare, the link that satisfies the link degradation condition is judged as the deterioration link, the link degradation sign is set with the parameter threshold value of setting;
B. handle worsening link, according to priority with the flag bit information of calling optimized choice HC module, DCA module, AMRC module and the PS resume module of HC module, DCA module, PS module, AMRC module, reconfigure worsening link circuit resource, worsen link until deletion;
C. to carried out deterioration link that step B handles carry out with steps A in the detection of identical parameters, with the parameter threshold value of setting relatively, worsen the link of handling the recovery condition and recover resource distribution again satisfying.
Method of the present invention be a kind of system multi-stage service is arranged and the situation of depositing under, Radio Link worsened detects and worsen the method for handling.Cordless communication network is according to detected Radio Link transmitting terminal power (P), and the receiving terminal error rate (BER) or Block Error Rate measurement parameters (measurement report) such as (BLER) are judged the transmission quality of Radio Link; When the transmission quality of Radio Link satisfies impaired condition, link degradation flag bit information is set, with take corresponding control measures, be that cordless communication network is optimized selection according to corresponding measurement report and deterioration processing flag bit information, select valid wireless link degradation handling process, the Radio Link that worsens is carried out reconfiguring of resource, Radio Link worsens handling process can call corresponding processing modules implement, mainly comprise: Handoff Control module (HC), dynamic channel allocation (DCA) module, packet scheduling (PS) module, adaptive multi-rate control (AMRC) module etc.; When system detects transmission quality through worsening the Radio Link handled and satisfies the recovery condition, this Radio Link that carried out the deterioration processing is returned to original resource configuration state again.Utilize method of the present invention can realize easily in the TD-SCDMA system, at multi-stage service and deposit, under multiple quality requirement and the situation of depositing, the different business that different quality is required carries out Radio Link and worsens and detect, worsen the recovery after handling and handling.
Method of the present invention is the different business requirement according to user applies, adopts different link degradation detection method, comparison threshold and measurement to report mode:
When whether the judgement Radio Link worsens, can detect the transmitting power of Radio Link transmitting terminal.When network measuring continues (perhaps average) when having surpassed given threshold value to a certain Radio Link transmitting power in a period of time, network judges that this link is in an aggravated form; When whether the judgement Radio Link worsens, also can detect the reception error rate (BER) or the Block Error Rate (BLER) of Radio Link receiving terminal, when the Radio Link error rate (BER) that network measuring is arrived or Block Error Rate (BLER) continued (perhaps average) greater than given threshold value in given sense cycle, network judged that this link is in an aggravated form.Above-mentioned testing result report mode, can adopt the cycle report manner also can adopt the report manner of Event triggered.
In continuing the process that detects, if when Radio Link generation Handoff Control (HC) or dynamic channel allocation (DCA) operation, then carry out the state-detection of Radio Link again, and record corresponding Handoff Control (HC) or dynamic channel allocation (DCA) operation in this sense cycle, and when detecting a certain Radio Link and take place to worsen, the link degradation sign is set; When a certain Radio Link takes place to worsen, select to worsen processing method according to corresponding modulated flag bit information and relative pilot frequency intensity criterion with the deterioration processing module; If certain link carried out the operation of Handoff Control (HC) or dynamic channel allocation (DCA) in this sense cycle, then in worsening processing procedure, no longer carry out the processing operation of Handoff Control (HC) or dynamic channel allocation (DCA); If certain link had both carried out Handoff Control (HC) operation and had also carried out dynamic channel allocation (DCA) operation in this sense cycle, then carry out the operation of packet scheduling (PS) or adaptive multi-rate control (AMRC) according to the business of selecting, judge further, if adaptive multi-rate control (AMRC) operation is then carried out in speech business, otherwise, then carry out packet scheduling (PS) operation; If in this sense cycle, do not carry out Handoff Control (HC) operation, and the pilot signal strength of neighbor cell deducts the value of pilot signal strength of this sub-district greater than given thresholding (COMP), the pressure of then carrying out Radio Link is switched, otherwise, do not force to switch; If in this sense cycle, in the time of overstepping the time limit not, carried out packet scheduling (PS) or adaptive multi-rate control (AMRC) operation, judge that then this Radio Link has continued to worsen, with this Radio Link deletion.
Radio Link of the present invention worsens the recovery processing method after handling, be the Radio Link that worsens carried out packet scheduling (PS) or adaptive multi-rate control (AMRC) worsen handle after in a period of time, when the communication quality that detects Radio Link has reached the relevant detection thresholding, then wireless link recovery is handled resource configuration state before to worsening.
Deterioration link detecting of the present invention and processing method can be applicable in the network equipment of wireless communication system and in the subscriber terminal equipment.
Description of drawings
Fig. 1 is the radio link quality testing process block diagram of comprehensive transmitting power P and the error rate/Block Error Rate (BER/BLER);
Fig. 2 is that Radio Link worsens first kind of detection method FB(flow block) judging link degradation in the detection;
Fig. 3 is that Radio Link worsens second kind of detection method FB(flow block) judging link degradation in the detection;
Fig. 4 is that Radio Link worsens the third detection method FB(flow block) of judging link degradation in the detection;
Fig. 5 is that Radio Link worsens the 4th kind of detection method FB(flow block) judging link degradation in the detection;
Fig. 6 is a TD-SCDMA system wireless link degradation process flow block diagram;
Fig. 7 is that TD-SCDMA system wireless link detecting is handled the main-process stream block diagram with deterioration.
Embodiment
The present invention a kind ofly is suitable for using, have in the TD-SCDMA system multi-stage service to exist] under the situation of multiple quality requirement, Radio Link worsens and detects and worsen the method for handling.Be mainly reflected on the three part technology contents: the Radio Link deterioration detects, Radio Link worsens processing and the Radio Link after handling is recovered processing.
In embodiments of the present invention, exemplified three kinds of methods that detect radio link quality altogether, promptly based on the error rate (BER) or Block Error Rate (BLER), based on transmitting power (P) and comprehensive detection method based on the error rate or Block Error Rate, transmitting power.In embodiments of the present invention, exemplified definite method of four kinds of link degradation altogether, promptly the mean value of the error rate that detects in given sense cycle (BER) or Block Error Rate (BLER) or transmitting power surpasses each set corresponding threshold value; In given sense cycle, the sampling point number that the error rate of detection (BER) or Block Error Rate (BLER) or transmitting power surpass each set corresponding threshold value surpasses corresponding number of samples threshold value; The error rate (BER) that detects or transmitting power surpass the duration of set corresponding threshold value, surpass relevant detection duration threshold value; Detect Block Error Rate (BLER), in statistic window was long, mistake piece number surpassed mistake piece number threshold value.The measurement that detects radio link quality reports mode mainly to comprise: periodic measurement reports mode and Event triggered measurement to report mode.
Main process based on the detection method of the error rate or Block Error Rate is: detect the error rate (BER) or Block Error Rate (BLER) that the link receiving terminal can directly characterize the radio link quality performance, when user terminal (or base station) detects the error rate (BER) of received signal or Block Error Rate (BLER) and surpasses corresponding given threshold value (can adopt definite method of any link degradation), this Radio Link is set at the deterioration link, the link degradation sign is set; Otherwise link keeps normal condition to continue to detect.The measurement of this process reports mode, can adopt periodic measurement to report mode, also can adopt the measurement of Event triggered to report mode.
Main process based on the detection method of transmitting power is: the numerical value that detects link transmitting terminal transmitting power, when the detected transmitting power of user terminal (or base station) surpasses corresponding given threshold value (can adopt definite method of any link degradation), this Radio Link is set at the deterioration link, the link degradation sign is set; Otherwise link keeps normal condition to continue to detect.The measurement of this process reports mode can adopt periodic measurement to report mode, also can adopt the measurement of Event triggered to report mode.
The detection method of the comprehensive error rate (BER) Block Error Rate (BLER) and transmitting power, idiographic flow is described below as shown in Figure 1:
Step 101 detects the numerical value that obtains link transmitting terminal (user terminal or base station) transmitting power;
Step 102 is judged the transmitting power of detected link transmitting terminal, whether surpasses given threshold value 1;
Step 103 when the transmitting power of detected link transmitting terminal, when surpassing given threshold value 1, starts a timer t and picks up counting;
Step 104 judges whether the timing time of timer t reaches default time T;
Step 105, if the timing time of timer t has reached default time T, then comprehensive again receiving terminal can directly characterize the error rate (BER) or the Block Error Rate (BLER) of radio link quality performance, and (user terminal or the base station) of promptly detecting link receives the error rate (BER) or Block Error Rate (BLER);
Step 106 judges whether the reception error rate (BER) of (user terminal or base station) link or Block Error Rate (BLER) surpass corresponding given threshold value 2;
Step 107,108, surpass given threshold value 2 if detect the reception error rate (BER) or the Block Error Rate (BLER) of user terminal or base station link, then remove timer t, with corresponding Radio Link is defined as worsening link, link degradation sign (as with " 1 " sign link degradation, normal with " 0 " sign link) is set.Program cycle is still returned step 101 and is carried out simultaneously.
In the above-mentioned steps 102,104,106, do not surpass corresponding given threshold value 1 if judge the transmitting power of detected link (user terminal or base station); Surpass corresponding given threshold value 1 though perhaps detect the transmitting power of link, the timing time of timer t does not also reach default time T; Surpass corresponding given threshold value 1 though perhaps detect the transmitting power of link, and the time that surpasses given threshold value 1 has reached preset time T, but when the reception error rate (BER) of this link or Block Error Rate (BLER) surpass corresponding given threshold value 2, link all keeps normal condition not do to worsen processing, continue trace routine, return step 101 and carry out.In the above-mentioned steps 102,106, when comparing, can adopt definite method of any link degradation to compare judgement with thresholding.
With based on transmitting power and the same based on the detection method of the error rate, Block Error Rate, in this method for comprehensive detection, measure and to report mode can adopt periodic measurement to report mode, also can adopt the measurement of Event triggered to report mode, perhaps both are used in combination.Need to prove, be first measurement, the transmitting power of judging the link transmitting terminal among Fig. 1 embodiment, again according to the detection of transmitting power, detection and the judgement whether the judged result decision receives the error rate or Block Error Rate.During concrete enforcement, also can receive the detection and the judgement of the error rate or Block Error Rate earlier, again according to the measurement, the judgement that detect, whether the judged result decision makes the transmitting terminal transmitting power.But, can obtain better effect by the execution of Fig. 1 order for the TD-SCDMA system.
In the TD-SCDMA system, because system can support multiple business, even therefore adopt with a kind of detection method (different detection methods, the threshold value the 1, the 2nd of selection, different), for the detection threshold value 1,2 of business of the same race may be not different yet.Therefore also need to select detection threshold according to the quality requirement of type of service, different business.
Below in conjunction with accompanying drawing 2,3,4,5 illustrated embodiments four kinds of methods whether definite link worsens of the present invention are described respectively.
Referring to Fig. 2, be that mean value with the error rate (BER) that detects in given sense cycle or Block Error Rate (BLER) or transmitting power surpasses each set corresponding threshold value and judges whether link worsens shown in the figure.
Step 201, the input link measured value, the transmitting power (Pmeasure) that comprises the error rate (BERmeasure), Block Error Rate (BLERmeasure) or the transmitting terminal of receiving terminal, specifically importing the error rate, Block Error Rate still is that input power is by the detection method decision of selecting;
Step 202 is provided with the parameter of adjudicating link degradation, comprises sense cycle T1 and threshold value S1 (the corresponding error rate, Block Error Rate and input power and quality requirement need be selected different S1);
Step 203, the base station controller (RNC) of measured value link error rates (BER), Block Error Rate (BLER) or the transmitting power P that periodically reports to to(for) user terminal or base station is asked average in sense cycle T1;
Step 204 compares mean value and the threshold value S1 that obtains;
Step 205 is if this mean value, represents that Radio Link keeps normal condition, is provided with Radio Link and normally indicates less than default threshold value S1;
Step 206 if this mean value represents then that more than or equal to default threshold value S1 Radio Link enters degradation mode, is provided with the link degradation sign.
Referring to Fig. 3, be shown in the figure in given sense cycle, the sampling point number that surpasses each set corresponding threshold value according to the error rate (BER) that detects or Block Error Rate (BLER) or transmitting power surpasses corresponding number of samples threshold value and judges whether link worsens.
Step 301, the input link measured value comprises the transmitting power (Pmeasure) of the error rate (BERmeasure), Block Error Rate (BLERmeasure) or transmitting terminal, specifically imports the error rate, Block Error Rate still is that input power is by the method for measurement decision of selecting;
Referring to Fig. 4, shown in the figure duration that surpasses set corresponding threshold value with the link error rates (BER) that detects or transmitting power, surpass relevant detection duration threshold value and judge whether link worsens.
Step 401, the input link measured value comprises the transmitting power (Pmeasure) of the error rate (BERmeasure) or transmitting terminal, specifically importing the error rate still is that input power is by the method for measurement decision of selecting;
Step 402 is provided with the parameter that judgement worsens link, comprises detecting duration T 3 and threshold value S3 (the corresponding error rate need be selected different S3 with input power);
Whether step 403 is judged link error rates (BER) that user terminal or base station periodically report to base station controller (RNC) or the measured value of transmitting power P, continue in detecting duration T 3 greater than setting threshold value S3;
Step 404, if the measured value of the error rate (BER) or transmitting power P does not continue in detecting duration T 3 greater than setting threshold value S3, the expression link-quality is normal, link is set normally indicates;
Step 405, if the measured value of the error rate (BER) or transmitting power P continues in detecting duration T 3 greater than setting threshold value S3, the expression link-quality worsens, and is judged as the deterioration link, and the link degradation sign is set.
Referring to Fig. 5, be shown in the figure in statistic window is long, detect Block Error Rate (BLER), surpass mistake piece number threshold value with mistake piece number and judge whether link worsens.Be to measure slower and a kind of detection method comparatively efficiently design at Block Error Rate (BLER).
Step 501, the input link measured value comprises Block Error Rate (BLERmeasure);
Step 502 is provided with the parameter that judgement worsens link, comprises that long W of statistic window and mistake piece count threshold value N2, promptly utilizes the Block Error Rate storage Buffer Pool of a length for W, stores W cyclic redundancy check (CRC) verification of up-to-date generation and indicates (Bad-CRC);
Step 505, if the mistake piece number of statistics during more than or equal to default threshold value N2, the expression link enters into degradation mode, and the link degradation sign is set.
Reporting of link transmission quality can be adopted periodic mode or Event triggered mode, if adopt the measurement of Event triggered to report mode, just reports when imposing a condition satisfied, can reduce unnecessary information interactive process.When adopting the measurement of Event triggered to report mode, at Fig. 2 to step 205 shown in Figure 5,305,404 and 504, not to base station controller (RNC) reporting links quality situation; Shown in the step 206,306,405 and 505, then the link degradation situation is triggered reporting base station controller (RNC) according to preset condition.
When wireless network detects Radio Link generation deterioration according to reporting information, will enter corresponding deterioration processing procedure.Worsening processing procedure can call different processing methods according to different deterioration situations, and these processing methods comprise dynamic channel allocation (DCA:dynamic channel allocation), Handoff Control (HC:handover control), adaptive multi-rate control (AMRC:adaptive multi-ratecontrol), packet scheduling (PS:packet schedule), until removing user link etc.The present invention has carried out the arrangement of priority to these processing methods, is followed successively by from high to low: Handoff Control (HC) or dynamic channel allocation (DCA), adaptive multi-rate control (AMRC) or packet scheduling (PS) are removed user link.Trigger operation DCA module and the certain user of worsening on the link can be adjusted to other links, trigger operation AMRC module and can reduce the voice service message transmission rate, trigger the message transmission rate of the compressible grouping user of operation PS module, trigger operation HC module and the certain user of worsening on the link can be switched to other sub-district (the concrete processing method of above-mentioned each module all is the deterioration chain processing method that tradition is used the present mobile communication system, and the present invention has just proposed to trigger the processing policy of disparate modules) from former sub-district.
Referring to Fig. 6, the corresponding processing procedure that worsens shown in the figure, concrete steps are as follows:
Step 601,612, do you judge PS and AMRC sign (PSAMRCFLAG=1?), promptly judge earlier and worsen the processing of whether having carried out packet scheduling (PS) or adaptive multi-rate control (AMRC) in the detection processing cycle at last one, if carried out this processing, the sign (PSAMRC_FLAG=1) that calls PS and the operation of AMRC module is accordingly promptly arranged, show that Radio Link has continued to have worsened the regular hour, so radio network controller (RNC) is with this link circuit deleting; Do not handle (PSAMRC_FLAG=0) if carry out PS or AMRC, then execution in step 602.
Step 602,603,606, judge HC (HC_FLAG) sign and DCA sign (DCA_FLAG), promptly judge at last one to worsen to detect whether carried out in the processing cycle that Handoff Control (HC) is handled or dynamic channel allocation (DCA) is handled: if carried out the HC processing but do not carry out that DCA handles then execution in step 607; If carried out the HC processing and carried out the DCA processing, then execution in step 609; Do not handle but carried out the DCA processing if carry out HC, then execution in step 605; Do not handle if carry out HC processing also not carrying out DCA, then execution in step 604.
Step 604,605,608 in step 602,603, if the corresponding flag bit that HC and DCA handle is 0, represent that present processing both can adopt DCA also can adopt HC, how to select the operating result of need according to step 604.Judge that according to the pilot signal strength information of user terminal report this user terminal selecting DCA still is that HC handles, whether the pilot signal strength of promptly judging adjacent cell deducts the pilot signal strength of this sub-district greater than (equaling) definite value COMP, if greater than, then force HC to switch (step 608) and the HC processing be set to be masked as 1, otherwise force the DCA operation, the DCA processing is set simultaneously is masked as 1 (step 605).In step 602,603, do not carry out HC in the processing cycle and handle (corresponding flag bit is 0) but carried out DCA processing (corresponding flag bit is 1) if worsen to detect at last one, then directly carry out DCA and handle, it is 1 (step 605) that the DCA flag bit is set simultaneously.
Step 607,608,609,610,611, if in step 602,603, the flag bit that HC switches is 1, and the flag bit of dynamic channel allocation (DCA) is 0, represent that present processing both can adopt HC also can adopt PS or AMRC to handle, need how to select according to step 607,609 operating result.Judge that according to the pilot strength information of user terminal report this user terminal selecting HC handles still PS or AMRC processing earlier, whether the pilot signal strength of promptly judging adjacent cell deducts the pilot signal strength of this sub-district greater than (an equaling) definite value (COMP), if greater than, then satisfy the condition (step 608) of forcing HC to switch, and HC is set is masked as 1, otherwise type of service (step 609) adopt PS to handle still AMRC handles with decision by further judging.If then carrying out adaptive multi-rate control (AMRC), speech business handles, it is 1 (step 611) that the AMRC flag bit is set simultaneously, then carrying out packet scheduling PS if not speech business handles, it is 1 (step 610) that the PS flag bit is set simultaneously, just improves link-quality by the data transmission capabilities that improves physical channel.If in step 602,603, judge at a last switching (HC) and dynamic channel allocation (DCA) flag bit that worsens in the detection processing cycle and be 1, then directly select to do AMRC or PS handles according to type of service (whether being speech business), just the data transmission capabilities by improving physical channel, reduce to disturb and improve link-quality.
Said process shown in Figure 6 has reflected that the present invention worsens a kind of strategy of link processing, carries out in conjunction with testing result, flag bit information, processing priority, can obtain obvious processing result.
If in worsening processing procedure, carry out adaptive multi-rate control (AMRC) or packet scheduling (PS) and handled operation, just the data transmission capabilities by improving physical channel, reduce to disturb improve link-quality and success after, at this moment, network need continue to detect the previous status that whether replying state of Radio Link can be arrived before handling.The method that wireless link recovery detects is identical with the method that radio link quality detects, and is set parameter value difference, also is each threshold value difference, and setting principle is to guarantee that Radio Link still can keep proper communication after over recovery is handled.Because what the recovery processing was primarily aimed at is user and the business that message transmission rate is lowered in worsening processing procedure, therefore it is corresponding that the processing method of calling with the deterioration processing is handled in recovery, recovers (HC and DCA operate and then can not recover again) as adaptive multi-rate control (AMRC) recovery, packet scheduling (PS).
Further specify the recovery process that link degradation of the present invention detects, worsens link processing and handle link below in conjunction with accompanying drawing 7.Be the TD-SCDMA system shown in the figure, Radio Link worsens the general flow chart that detects with the deterioration processing.Among the figure, step 701 is that to 714 Radio Link worsens testing process, and step 721 is to 722 for worsening the link processing process, and step 731 is handled recovery process to 733 for worsening.
Radio Link worsens the concrete implementation that detects and is described as follows:
Step 701,702 selects the detection method of Radio Link, the decision method and the detection of deterioration link to report mode according to type of service, quality requirement, determines each corresponding threshold parameter and time parameter according to method selected then.
Step 703,704,705,706,707,708, step 703 obtains link measurements (error rate, Block Error Rate, transmitting power); In the Radio Link testing process, if carried out switching the operation (step 704,707) of (HC) and dynamic channel allocation (DCA), the corresponding flag bit that meeting HC handles or DCA handles is set to 1, HC_FLAG=1 (step 705), DCA_FLAG=1 (step 708), and timer W1 and W2 be set respectively, the meaning that W1 wherein is set is at W1 in the time, the Radio Link that worsens is also no longer switched (HC) operation, the meaning that W2 is set is in the time, the Radio Link that worsens also no longer to be carried out dynamic channel allocation (DCA) operation at W2; Simultaneously since user terminal conversion communication link, so will be changed to 0, just carry out detection statistics again about the detection timer of Radio Link, the measurement result of reappraising (step 706), program is returned step 703; If in the Radio Link testing process, also do not carry out HC and DCA operation, then execution in step 709.
Step 709,710,711,712,713,714, if testing result surpasses the threshold value (step 709) that sets, judge that further it surpasses the duration that sets threshold value, this judgement is by starting a timer t (step 710) and judging whether its timing time surpasses the duration T of setting (step 711) and realize, when testing result surpasses the threshold value that sets and reaches the duration that sets, judge that Radio Link worsens, Radio Link is provided with link degradation sign (step 712) for this reason; Need simultaneously to judge current mark bit HC-FLAG=1 (step 705) is being set, whether set timer W1, W2 has surpassed the time limit of setting (step 713) respectively during DCA-FLAG=1 (step 708), if overstepping the time limit, then remove corresponding marker bit HC_FLAG=0, DCA_FLAG=0 (step 714), program execution in step 721 and execution in step 706; If there is not overstepping the time limit, then direct execution in step 721.
Radio Link worsens the concrete implementation of handling and is described as follows:
Step 721, carrying out link degradation handles, comprise and carry out HC or DCA, AMRC or processing such as PS, dismounting link, concrete implementation can be in conjunction with referring to Fig. 6, if executed is crossed HC, DCA operation then do not remake HC, DCA operation (not necessarily link processing does because of worsening in HC, DCA operation) in the near future;
Step 722, whether judgement symbol position PSAMRC_FLAG is 1, if be not 1, then execution in step 741, deletion link degradation sign if be 1, then worsen to handle and recovers.
Radio Link worsens the concrete implementation of handling recovery and is described as follows:
Step 731, worsened the recovery detection to carrying out worsening the link of handling, detection method can adopt selected detection method in the step 701, and the threshold parameter that the recovery condition is handled in the satisfied deterioration of just selecting is different from the threshold parameter that satisfies the link degradation condition;
Step 732 judges whether to satisfy the link-recovery condition according to testing result, does not satisfy then to proceed link degradation and recover to detect execution in step 733 then when satisfying.
Step 733 to recovering through worsening the link of handling, is promptly recovered the original configuration of link.
By technical scheme design Radio Link detection of the present invention and deterioration processing module, can realize by the functional module of three parts: link detecting, worsen processing and Radio Link deterioration recovery and detect and handle.Be specially adapted in the TD-SCDMA system, multi-stage service is also deposited, under the situation of multiple quality requirement, is carried out Radio Link and detect with worsening and handle.Can be used on the network equipment of mobile radio system and on the subscriber terminal equipment.
Claims (16)
1. the Radio Link of a TD-SCDMA system worsens detection and worsens processing method, it is characterized in that comprising:
A. in current deterioration sense cycle, detect the parameter of reflection transmission of radio links quality, compare, the link that satisfies the link degradation condition is judged as the deterioration link, the link degradation sign is set with the parameter threshold value of setting;
B. handle worsening link, according to priority with the flag bit information of calling optimized choice HC module, DCA module, AMRC module and the PS resume module of HC module, DCA module, PS module, AMRC module, reconfigure worsening link circuit resource, worsen link until deletion;
C. to carried out deterioration link that step B handles carry out with steps A in the detection of identical parameters, with the parameter threshold value of setting relatively, worsen the link of handling the recovery condition and recover resource distribution again satisfying.
2. the Radio Link of a kind of TD-SCDMA according to claim 1 system worsens and detects and worsen processing method, it is characterized in that: described steps A comprises that also the link condition to detecting in the deterioration sense cycle reports, and adopts the periodic measurement to report the measurement of mode or employing Event triggered to report mode.
3. the Radio Link of a kind of TD-SCDMA according to claim 1 system worsens and detects and worsen processing method, it is characterized in that: in the described steps A, before carrying out described comparison, also judge the sign that calls of HC module and DCA module, when being masked as when carrying out calling the processing of HC module and DCA module, start two timers and end step A respectively, detect the parameter of reflection radio link quality again; When being masked as when not carrying out calling the processing of HC module and DCA module, continuing execution in step A, and after the link degradation sign is set, when two timers reach,, remove the sign that calls that called HC module and DCA module in limited time.
4. the Radio Link of a kind of TD-SCDMA according to claim 1 system worsens and detects and worsen processing method, it is characterized in that: in the described steps A, the parameter threshold value of the parameter of described reflection radio link quality and setting is to determine according to the type of service and the quality requirement thereof of user applies.
5. the Radio Link of a kind of TD-SCDMA according to claim 1 system worsens and detects and worsen processing method, it is characterized in that: the parameter threshold value of the judgement link degradation of setting in the described steps A is different from the parameter threshold value that the judgement of setting among the step C worsens link-recovery, can keep proper communication to select by the Radio Link after the former resource distribution of recovery.
6. the Radio Link of a kind of TD-SCDMA according to claim 1 system worsens and detects and worsen processing method, and it is characterized in that: described steps A further comprises:
A11. detect the transmitting power of Radio Link transmitting terminal or the error rate or the Block Error Rate of Radio Link receiving terminal;
A12., the threshold value of sense cycle and transmitting power, the error rate, Block Error Rate is set;
A13. calculate the interior transmitting power of sense cycle or the mean value of the error rate or Block Error Rate, and the threshold value of the transmitting power that is provided with steps A 12 or the error rate or Block Error Rate relatively, to be judged as the deterioration link more than or equal to the Radio Link of threshold value, otherwise be judged as normal link.
7. the Radio Link of a kind of TD-SCDMA according to claim 1 system worsens and detects and worsen processing method, and it is characterized in that: described steps A further comprises:
A21. detect the transmitting power of Radio Link transmitting terminal or the error rate or the Block Error Rate of Radio Link receiving terminal;
A22., sense cycle is set, the number of samples threshold value of the threshold value of the transmitting power or the error rate or Block Error Rate and transmitting power or the error rate or Block Error Rate;
A23. with the transmitting power in the sense cycle or the error rate or Block Error Rate, compare with the transmitting power of steps A 22 settings or the threshold value of the error rate or Block Error Rate, statistics surpasses the transmitting power of threshold value or the number of samples of the error rate or Block Error Rate, the transmitting power that surpasses threshold value of statistics or the number of samples of the error rate or Block Error Rate are compared with the transmitting power of steps A 22 settings or the number of samples threshold value of the error rate or Block Error Rate, to be judged as the deterioration link more than or equal to the Radio Link of number of samples threshold value, otherwise be judged as normal link.
8. the Radio Link of a kind of TD-SCDMA according to claim 1 system worsens and detects and worsen processing method, and it is characterized in that: described steps A further comprises:
A31. detect the transmitting power of Radio Link transmitting terminal or the error rate of Radio Link receiving terminal;
A32., the threshold value of the transmitting power or the error rate is set and is provided with and detect the duration threshold value;
A33. with the transmitting power or the error rate that detect, compare with the transmitting power of steps A 32 settings or the threshold value of the error rate, statistics surpasses the transmitting power of threshold value or the duration of the error rate, the transmitting power that surpasses threshold value of statistics or the duration of the error rate are compared with the transmitting power of steps A 32 settings or the duration threshold value of the error rate, to be judged as the deterioration link more than or equal to the Radio Link of duration threshold value, otherwise be judged as normal link.
9. the Radio Link of a kind of TD-SCDMA according to claim 1 system worsens and detects and worsen processing method, and it is characterized in that: described steps A further comprises:
A41. detect the Block Error Rate of Radio Link receiving terminal;
A42., the threshold value of statistic window length and mistake piece number is set;
A43. statistics mistake piece number in statistic window is long, the threshold value of the mistake piece number that is provided with steps A 42 relatively will be judged as the deterioration link more than or equal to the Radio Link that piece is by mistake counted threshold value, otherwise be judged as normal link.
10. the Radio Link of a kind of TD-SCDMA according to claim 9 system worsens and detects and worsen processing method, it is characterized in that: described statistic window length is that a length is the long Block Error Rate storage Buffer Pool of window, the indication of storage cyclic redundancy check, statistics mistake piece number wherein.
11. the Radio Link of a kind of TD-SCDMA according to claim 1 system worsens and detects and worsen processing method, it is characterized in that: described steps A further comprises:
A51. detect the transmitting power of Radio Link transmitting terminal and the error rate and the Block Error Rate of Radio Link receiving terminal;
A52., the threshold value and the duration threshold value of transmitting power, the error rate, Block Error Rate are set;
A53. the transmitting power of detection and the transmitting power threshold value of steps A 52 settings are compared, when the transmitting power that detects during less than the transmitting power threshold value that is provided with, interrupt this step, when the transmitting power that detects during more than or equal to the transmitting power threshold value that is provided with, further judge the duration of the transmitting power of detection more than or equal to the transmitting power threshold value that is provided with, when the duration less than set duration during threshold value, interrupt this step, when the duration more than or equal to set duration during threshold value, further the error rate or the Block Error Rate that detects compared with the error rate of steps A 52 settings or the threshold value of Block Error Rate, to be judged as the deterioration link more than or equal to the Radio Link of threshold value, otherwise be judged as normal link.
12. the Radio Link of a kind of TD-SCDMA according to claim 1 system worsens and detects and worsen processing method, it is characterized in that described step B, further comprises:
B1. judge PS module and AMRC module invokes sign, PS and AMRC resume module had been carried out calling in the sense cycle for worsening at last one, then deletion worsens link, does not carry out the continuation execution in step B2 that PS and AMRC handle in the sense cycle for worsening at last one;
B2. judge HC module and DCA module invokes sign, carried out calling HC and DCA resume module in the sense cycle, select to call AMRC module or PS resume module for worsening at last one; Carried out calling the HC resume module in the sense cycle but never call DCA resume module for worsening, selected to call HC module or PS module or AMRC resume module at last one; Do not carry out calling the HC resume module in the sense cycle but carried out calling the DCA resume module for worsening, then forced to call the DCA resume module at last one; Do not carry out calling the HC resume module in the sense cycle and do not carry out calling the DCA resume module yet for worsening, selected to call DCA module or HC resume module at last one.
13. the Radio Link of a kind of TD-SCDMA according to claim 12 system worsens and detects and worsen processing method, it is characterized in that among the described step B2, HC module or PS module or AMRC resume module are called in selection, be further to judge the difference of pilot signal strength of the pilot signal strength of adjacent cell and this sub-district and the relation between set point, when the difference of the pilot signal strength of the pilot signal strength of adjacent cell and this sub-district during more than or equal to set point, then force to call the HC resume module, when the difference of the pilot signal strength of the pilot signal strength of adjacent cell and this sub-district during, then select to call PS module or AMRC resume module less than set point.
14. worsen according to the Radio Link of claim 12 or 13 described a kind of TD-SCDMA systems and to detect and worsen processing method, it is characterized in that: among the described step B2, the PS module is called in selection or the AMRC resume module is further to judge to worsen the business of transmitting on the link, then force to call the AMRC resume module for speech business, then force to call the PS resume module for non-voice service.
15. the Radio Link of a kind of TD-SCDMA according to claim 12 system worsens and detects and worsen processing method, it is characterized in that: among the described step B2, DCA module or HC resume module are called in selection, be further to judge the difference of pilot signal strength of the pilot signal strength of adjacent cell and this sub-district and the relation between set point, when the difference of the pilot signal strength of the pilot signal strength of adjacent cell and this sub-district during more than or equal to set point, then force to call the HC resume module, when the difference of the pilot signal strength of the pilot signal strength of adjacent cell and this sub-district during, then force to call the DCA resume module less than set point.
16. the Radio Link of a kind of TD-SCDMA according to claim 1 system worsens and detects and worsen processing method, it is characterized in that: described step C is the recovery configuring of carrying out former resource at the link that carried out calling the PS resume module or call the AMRC resume module among the step B.
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| CN 03141259 CN1266955C (en) | 2003-06-10 | 2003-06-10 | Method for wireless link deterioration detection and deterioration processing of TD-SCDMA system |
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| CN 03141259 CN1266955C (en) | 2003-06-10 | 2003-06-10 | Method for wireless link deterioration detection and deterioration processing of TD-SCDMA system |
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| CN1266955C CN1266955C (en) | 2006-07-26 |
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