CN101415201B - Method for judging signal quality - Google Patents
Method for judging signal quality Download PDFInfo
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- CN101415201B CN101415201B CN2007101628304A CN200710162830A CN101415201B CN 101415201 B CN101415201 B CN 101415201B CN 2007101628304 A CN2007101628304 A CN 2007101628304A CN 200710162830 A CN200710162830 A CN 200710162830A CN 101415201 B CN101415201 B CN 101415201B
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Abstract
The invention discloses a method for judging signal quality in the technical field of mobile communication. The method is used by a network side to judge the quality of signals between the network side and a user. Firstly, the network side sends a measurement control message to a user terminal, and the message carries two measurement variables including a primary common control channel received signal code power and a time slot interference signal code power and reporting instructions corresponding to the two measurement variables; then the user terminal reports a measurement report message to the network side, and the measurement report message carries measured values of the two measurement variables; and the network side obtains a difference value K by subtracting one measured value of the primary common control channel received signal code power from the measured value of the time slot interference signal code power, and judges the signal quality by comparing the difference value K with a scheduled threshold T. By using the two measurement variables to comprehensively judge the signal quality, the method can accurately judge the present signal quality so as to make a correct adjustment decision and ensures the communication quality of the user.
Description
Technical field
The present invention relates to the mobile communication technology field, relate in particular to a kind of method of judging signal quality in the mobile communication system.
Background technology
Because the position of terminal is not fixed in the mobile communication system, in different positions, signal strength signal intensity all may be different with interference, need in time carry out according to signal quality processing such as sub-district switching, channel switching, to guarantee the quality of communication.Because the measuring amount relevant with signal quality mainly is basic Common Control Channel received signal code power PCCPCHRSCP (Primary Common Control Physical Channel Received signal code power) and slot interfering signal of time sign indicating number power Timeslot ISCP (Interference Signal Code Power) in TD-SCDMA (TD SDMA access) system, measurement of correlation incident when carrying out the signal quality measurement of correlation is respectively described below for common frequency measurement and different-frequency measure:
For common frequency measurement, relevant measurement event comprises:
1G: the change of best cell;
1H: time slot ISCP is lower than a certain threshold;
1I: time slot ISCP is higher than a certain threshold;
For different-frequency measure, relevant measurement event comprises:
2a: the renewal of optimum frequency;
2b: the estimated quality of current frequency of utilization be lower than a certain thresholding and one not the estimated quality of frequency of utilization be higher than a certain thresholding;
2c: one not the estimated quality of frequency of utilization greater than a certain thresholding;
2d: the estimated quality of current frequency of utilization is lower than a certain thresholding;
2e: one not the estimated quality of frequency of utilization be lower than a certain thresholding;
2f: the estimated quality of current frequency of utilization is higher than a certain thresholding.
These incidents in above-mentioned common frequency measurement and the different-frequency measure all are to use PCCPCH RSCP or time slot ISCP as decision rule respectively.
If judge the quality of signal quality separately with these incidents, the height of current PCCPCHRSCP or the height of time slot ISCP can only be described.Even current as can be seen RSCP is very high,, can not illustrate that the current demand signal quality is good if disturb ISCP simultaneously also very high; If opposite RSCP is very low, disturb ISCP simultaneously also very low, also poor signal quality not necessarily.If only just make judgement, do the adjustment decision-making that makes mistake probably with one of them measuring amount.
Thereby, in mobile communication system, need a kind of more accurate more comprehensively method of judging signal quality, accurately judge signal quality so that make correct adjustment decision-making according to signal quality, guarantee the user's communications quality.
Summary of the invention
Technical problem to be solved by this invention is, the method for judging signal quality in a kind of TD-SCDMA system is provided, and accurately judges signal quality, and judged result guarantees that as the foundation of adjusting the user user's communications quality reaches better effect.
The invention provides a kind of method of judging signal quality, be used for the signal quality between network side judgement and user, described method comprises the steps:
(1) network side sends to user terminal and measures control messages, carries the indication that reports of basic Common Control Channel received signal code power PCCPCH RSCP and two measuring amount of slot interfering signal of time sign indicating number power Timeslot ISCP and described two measuring amount correspondences in this measurement control messages;
(2) user terminal carries the measured value of basic Common Control Channel received signal code power PCCPCH RSCP and two measuring amount of slot interfering signal of time sign indicating number power Timeslot ISCP to network side reporting measurement reports message in this measurement report message;
(3) network side utilizes the measured value of slot interfering signal of time sign indicating number power Timeslot ISCP to deduct the measured value of basic Common Control Channel received signal code power PCCPCH RSCP, obtain difference K, the size of the thresholding T by more described difference K and setting is judged signal quality.
Further, further comprise in the step (3):
When K＞T, the expression poor signal quality, then network side is adjusted accordingly to the user;
When K＜T, the expression signal quality is good, and then network side is not adjusted the user.
Further, further comprise in the step (3):
When the minimum received signal Q_RxLevMin in K＜T and basic Common Control Channel received signal code power PCCPCH RSCP＞sub-district, the expression signal quality is good, and then network side is not adjusted the user.
Further, in the step (1):
In the common frequency measurement amount Intra-frequency of described measurement control messages measurement quantity, carry basic Common Control Channel received signal code power PCCPCH RSCP and two measuring amount of slot interfering signal of time sign indicating number power Timeslot ISCP, comprise time slot 0 in the time slot tabulation.
Further, in the step (1):
In the cell report amount Cell of described measurement control messages reporting quantities, comprise the indication that reports of two measuring amount: Timeslot ISCP reporting indicator, Primary CCPCH RSCPreporting indicator.
In described cell report amount Cell reporting quantities:
Utilize Timeslot ISCP reporting indicator indication Timeslot ISCP to report;
Utilize Primary CCPCH RSCP reporting indicator indication PCCPCH RSCP to report.
Further, the measurement report criterion of user terminal when network side reporting measurement reports message is periodic report or reporting events in the step (2).
Further, the measured value of the described slot interfering signal of time sign indicating number power Timeslot ISCP that the middle calculated difference K of step (3) is used is the measured value of the slot interfering signal of time sign indicating number power Timeslot ISCP of time slot 0.
Compared with prior art, the method of judgement signal quality of the present invention, basic Common Control Channel received signal code power PCCPCH RSCP and two measuring amount of slot interfering signal of time sign indicating number power Timeslot ISCP have been taken all factors into consideration, utilize two measuring amount comprehensively to judge signal quality, can judge current signal quality accurately, so that make correct adjustment decision-making, guarantee the user's communications quality.Avoid only utilizing in the existing method one of described two measuring amount to carry out signal quality and judged the problems such as poor accuracy that cause more.
Description of drawings
Fig. 1 is that subscriber equipment and network side carry out the Signalling exchange schematic diagram of channel quality when judging;
Fig. 2 is that network side carries out the flow chart that channel quality is judged.
Embodiment
In conjunction with the accompanying drawings technical scheme of the present invention is described in further details below by embodiment.
At the defective that can not accurately judge signal quality in the prior art, the present invention proposes a kind of basic Common Control Channel received signal code power PCCPCH RSCP and two measuring amount of slot interfering signal of time sign indicating number power Timeslot ISCP utilized, comprehensively judge the method for signal quality.So that,, guarantee the user's communications quality so that make correct adjustment decision-making by judging current signal quality accurately.
As shown in Figure 1, shown and carried out the Signalling exchange schematic diagram between network side and user.
During measurement, network side is carrying two measuring amount PCCPCHRSCP and Timeslot ISCP in giving user's measurement control messages, and these two measuring amount correspondences report indication;
The user feeds back to the measured value of network side PCCPCH RSCP and Timeslot ISCP in measurement report message;
The measured value of network side calculating Timeslot ISCP deducts the measured value of PCCPCH RSCP, obtains both difference K, judges signal quality by the thresholding of relatively difference K and setting.
As shown in Figure 2, shown and carried out signal quality measured idiographic flow schematic diagram, comprised following concrete implementation step:
Step 110, at first, the relevant information unit IE in the allocating and measuring control messages following (irrelevant IE does not list with present embodiment):
1) common frequency measurement amount Intra-frequency measurement quantity (in common frequency measurement, different-frequency measure, system's measurements control messages this IE being arranged all) comprises Primary CCPCH RSCP, and TimeslotISCP comprises time slot 0 in the time slot tabulation;
What 2) cell report amount Cell reporting quantities (in common frequency measurement, different-frequency measure control messages this IE being arranged all) comprised corresponding Primary CCPCH RSCP, two measuring amount of Timeslot ISCP reports indication Timeslot ISCP reporting indicator, Primary CCPCH RSCPreporting indicator;
Step 120, setting measurement report criterion can be cycle or incident;
Step 130, according to above-mentioned configuration, UE can carry out periodic report or reporting events, UE will carry PrimaryCCPCH RSCP, the measured value of Timeslot ISCP in cell measurement results Cell measured results when reporting measurement reports;
No matter step 140 is cycle or reporting events, all the Timeslot ISCP to Primary CCPCH RSCP among the Cell measuredresults and time slot 0 calculates difference when receiving measurement report: K=Timeslot ISCP-Primary CCPCH RSCP;
Step 150, thresholding T of setting, can provide suitable value by test and emulation, when K＞T, think that signal quality is bad, can adjust accordingly the user, on the contrary K＜T, and the minimum received signal Q_RxLevMin (can join) in PrimaryCCPCH RSCP＞sub-district, think that signal quality is relatively good, repeating step 140,150.
In the step 150, network side radio network controller RNC is when receiving measurement report, all to the Primary CCPCH RSCP among the cell measurement results Cell measured results, the Timeslot ISCP of time slot 0 calculates difference: K=Timeslot ISCP-Primary CCPCH RSCP, Primary CCPCH RSCP, the span of Timeslot ISCP is (0..91), and it is as follows to be mapped as Dbm:
| Reported value | Measured quantity value | Unit |
| P-CCPCH RSCP_LEV_00 | P-CCPCH RSCP＜-115 | dBm |
| P-CCPCH RSCP_LEV_01 | -115≤P-CCPCH RSCP＜-114 | dBm |
| P-CCPCH RSCP_LEV_02 | -114≤P-CCPCH RSCP＜-113 | dBm |
| ... | ... | ... |
| P-CCPCH RSCP_LEV_89 | -27≤P-CCPCH RSCP＜-26 | dBm |
| P-CCPCH RSCP_LEV_90 | -26≤P-CCPCH RSCP＜-25 | dBm |
| P-CCPCH RSCP_LEV_91 | -25≤P-CCPCH RSCP | dBm |
| Reported value | Measured quantity value | Unit |
| UE_TS_ISCP_LEV_00 | Timeslot_ISCP ＜-115 | dBm |
| UE_TS_ISCP_LEV_01 | -115≤Timeslot_ISCP ＜-114 | dBm |
| UE_TS_ISCP_LEV_02 | -114≤Timeslot_ISCP ＜-113 | dBm |
| ... | ... | ... |
| UE_TS_ISCP_LEV_89 | -27≤Timeslot_ISCP ＜-26 | dBm |
| UE_TS_ISCP_LEV_90 | -26≤Timeslot_ISCP ＜-25 | dBm |
| UE_TS_ISCP_LEV_91 | -25≤Timeslot_ISCP | dBm |
Suppose that thresholding T is 0, Primary CCPCH RSCP is 16 in the measurement report, be equivalent to [100dbm ,-99dbm), the Timeslot ISCP of time slot 0 is 20, be equivalent to [96dbm ,-95dbm), K=4 then, greater than T, think that signal quality is bad, can adjust accordingly the user.
Described herein is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Therefore, all any modifications of being done within the spirit and principles in the present invention, be equal to replacement, improve and upgrade or the like, all should be included within protection scope of the present invention.
Claims (7)
1. a method of judging signal quality is used for the signal quality between network side judgement and user, it is characterized in that, comprises the steps:
(1) network side sends to user terminal and measures control messages, carries the indication that reports of basic Common Control Channel received signal code power PCCPCH RSCP and two measuring amount of slot interfering signal of time sign indicating number power Timeslot ISCP and described two measuring amount correspondences in this measurement control messages;
(2) user terminal carries the measured value of basic Common Control Channel received signal code power PCCPCH RSCP and two measuring amount of slot interfering signal of time sign indicating number power Timeslot ISCP to network side reporting measurement reports message in this measurement report message;
(3) network side utilizes the measured value of the slot interfering signal of time sign indicating number power Timeslot ISCP of time slot 0 to deduct the measured value of basic Common Control Channel received signal code power PCCPCH RSCP, obtain difference K, the size of the thresholding T by more described difference K and setting is judged signal quality.
2. the method for claim 1 is characterized in that, step further comprises in (3):
When K＞T, the expression poor signal quality, then network side is adjusted accordingly to the user;
When K＜T, the expression signal quality is good, and then network side is not adjusted the user.
3. method as claimed in claim 2 is characterized in that, step further comprises in (3):
When the minimum received signal Q_RxLevMin in K＜T and basic Common Control Channel received signal code power PCCPCH RSCP＞sub-district, the expression signal quality is good, and then network side is not adjusted the user.
4. the method for claim 1 is characterized in that, in the step (1):
In the common frequency measurement amount Intra-frequency of described measurement control messages measurement quantity, carry basic Common Control Channel received signal code power PCCPCH RSCP and two measuring amount of slot interfering signal of time sign indicating number power Timeslot ISCP, comprise time slot 0 in the time slot tabulation.
5. the method for claim 1 is characterized in that, in the step (1):
In the cell report amount Cell of described measurement control messages reporting quantities, comprise the indication that reports of two measuring amount: Timeslot ISCP reporting indicator, Primary CCPCH RSCPreporting indicator.
6. method as claimed in claim 5 is characterized in that, in described cell report amount Cellreporting quantities:
Utilize Timeslot ISCP reporting indicator indication Timeslot ISCP to report;
Utilize Primary CCPCH RSCP reporting indicator indication PCCPCH RSCP to report.
7. the method for claim 1 is characterized in that, the measurement report criterion of user terminal when network side reporting measurement reports message is periodic report or reporting events in the step (2).
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| CN2007101628304A CN101415201B (en) | 2007-10-15 | 2007-10-15 | Method for judging signal quality |
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| CN2007101628304A CN101415201B (en) | 2007-10-15 | 2007-10-15 | Method for judging signal quality |
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| CN101415201A CN101415201A (en) | 2009-04-22 |
| CN101415201B true CN101415201B (en) | 2010-09-29 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101702821B (en) * | 2009-11-27 | 2012-04-25 | 上海华为技术有限公司 | Admittance method, device and communication system |
| CN102088726A (en) * | 2009-12-02 | 2011-06-08 | 中兴通讯股份有限公司 | Frequency multiplexing method and device |
| CN102612039B (en) * | 2011-01-19 | 2017-06-13 | 中兴通讯股份有限公司 | Mutual interference is reported in a kind of equipment triggering method and system |
| CN103874101B (en) * | 2014-03-14 | 2017-04-19 | 大唐移动通信设备有限公司 | Method for detecting co-frequency interference of TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) network, base station and RNC (Radio Network Controller) |
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| EP1501327A1 (en) * | 2003-07-24 | 2005-01-26 | Siemens Mobile Communications S.p.A. | Method to estimate the interference signal code power (ISCP) in a TD-CDMA system |
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| CN1666433A (en) * | 2002-10-16 | 2005-09-07 | 松下电器产业株式会社 | Radio reception device and sir calculation method |
| CN1756413A (en) * | 2004-09-30 | 2006-04-05 | 中兴通讯股份有限公司 | SIR measuring method for broadband CDMA system uplink |
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Patent Citations (4)
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|---|---|---|---|---|
| CN2696244Y (en) * | 2001-08-16 | 2005-04-27 | 交互数字技术公司 | Radio network controller for determining whether start switching |
| CN1666433A (en) * | 2002-10-16 | 2005-09-07 | 松下电器产业株式会社 | Radio reception device and sir calculation method |
| EP1501327A1 (en) * | 2003-07-24 | 2005-01-26 | Siemens Mobile Communications S.p.A. | Method to estimate the interference signal code power (ISCP) in a TD-CDMA system |
| CN1756413A (en) * | 2004-09-30 | 2006-04-05 | 中兴通讯股份有限公司 | SIR measuring method for broadband CDMA system uplink |
Non-Patent Citations (4)
| Title |
|---|
| 3rd Generation Partnership Project.Technical Specification Group Radio Access Network |
| 3rd Generation Partnership Project.Technical Specification Group Radio Access Network RadioResource Control (RRC);Protocol Specification.3GPP TS 25.331 V8.0.0.2007,3(25331800),第8.2.8.3,8.4.0-8.4.2,8.6.7.7,10.3.7.3,10.3.7.5,10.3.7.44,10.3.7.65节. * |
| Protocol Specification.3GPP TS 25.331 V8.0.0.2007,3(25331800),第8.2.8.3,8.4.0-8.4.2,8.6.7.7,10.3.7.3,10.3.7.5,10.3.7.44,10.3.7.65节. |
| RadioResource Control (RRC) |
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