CN101222280B - Single time slot power detecting method and system - Google Patents
Single time slot power detecting method and system Download PDFInfo
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- CN101222280B CN101222280B CN2007100775293A CN200710077529A CN101222280B CN 101222280 B CN101222280 B CN 101222280B CN 2007100775293 A CN2007100775293 A CN 2007100775293A CN 200710077529 A CN200710077529 A CN 200710077529A CN 101222280 B CN101222280 B CN 101222280B
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Abstract
The invention discloses a single time slot power detection method and a device thereof; the method comprises the following steps: time delay is set between a base station and a repeater; a synchronizing control module compensates the time difference between an uplink and a downlink according to the time delay; a TD-SCDMA radio-frequency power signal is acquired, converted to a digital signal and sent to the synchronizing control module; a downlink pilot signal, a first switching point and a second switching point are sought out; a switching point of each time slot of the downlink and the uplink is sought out; a training sequence code position of each time slot is sought out; according to the position, a power value of each time slot is read from the TD-SCDMA radio-frequency power signal. Through the technical proposal, the invention can accurately detect the power value of each time slot of a TD-SCDMA sub-frame and further infers whether a current network state or an equipment state is good or not.
Description
[technical field]
The present invention relates to communication technical field, relate in particular to the method and apparatus that single time slot power detects.
[background technology]
The TD-SCDMA system is different with the maximum different physical-layer techniques that are of other 3G systems.The employed frequency of its up-downgoing channel is identical in the TD system, each is wireless frame length 10ms.TD-SCDMA is divided into 2 5ms subframes with each radio frames, and the frame structure of two sub-frame is identical.
As shown in Figure 1, each subframe is that conventional time slot (TS0-TS6) and 3 special time slots (descending pilot frequency time slot DwPTs, protection be GP and uplink pilot time slot UpPTs at interval) of 675us are formed by 7 length.Conventional time slot is used for transmitting user data or control information, and TS0 always comes the transmitting system broadcast message as descending time slot regularly, and TS1 is always regularly as ascending time slot.Other conventional time slot can be configured to upstream or downstream as required neatly to realize the transmission of asymmetric traffic, as the time slot of up link with as being separated by 1 transfer point between the time slot of down link.In the TD-SCDMA system, be provided with two transfer points in the subframe of each 5ms, the 1st transfer point is fixed on TS0 end, and the 2nd transfer point then depends on the configuration of sub-district uplink and downlink time slot.
In the TD-SCDMA system, have only the power of descending pilot frequency time slot DwPTs and TS0 time slot not change along with the change of number of users, DwPTs and TS0 time slot are normal output and power invariability, to make things convenient for terminal use's access.Other time slot just has burst when service access is arranged, the access customer number amount is different, and its power is also just different, and when not inserting user's time slot, its power is represented the power of low noise.
In traditional repeater, corresponding time slot can not be distinguished, the power of time slot corresponding can not be known, can't the aware networks operating state aspect the network optimization whether good.
[summary of the invention]
Goal of the invention of the present invention provides the method and apparatus that a kind of single time slot power detects, and to reach each time slot is carried out the purpose of power detection accurately.
For reaching the foregoing invention purpose, the present invention proposes following technical scheme:
The method that a kind of single time slot power detects, this method may further comprise the steps:
A, the time delay between base station and the repeater is set, synchronization control module compensates according to the time difference of said time delay to up link, down link;
B, obtain the TD-SCDMA rf power signal and convert digital signal to, give synchronization control module; Search down-bound pilot frequency signal, first switching point, second switching point, search the switching point of down link, each time slot of up link;
The performance number of each time slot is read in C, the position of searching the training sequence code of each time slot from the TD-SCDMA rf power signal according to said position.
Preferably, obtaining signal in the said steps A specifically comprises: obtain said rf power signal through ADC8314.
Preferably, search procedure specifically comprises among the said step B: said synchronization control module is searched down-bound pilot frequency signal, first switching point, second switching point according to the time window principle, searches the switching point of down link, each time slot of up link.
Preferably, also comprise step after the said step C:
D, said synchronization control module send the performance number of each time slot to the MCU circuit, carry out format conversion after, give the tool terminal module by the MCU circuit again.
The device that a kind of single time slot power detects, this device comprises:
The tool terminal module is used to be provided with the delay compensation value between user-defined base station and the repeater and is sent to MCU;
Sampling module is used to obtain the TD-SCDMA rf power signal and converts digital signal to, gives synchronization control module;
MCU is used for transmitting said delay compensation value to synchronization control module, and the data of transmission are carried out analyzing and processing;
Synchronization control module is used for compensating according to the time difference of said time delay to up link, down link; Search down-bound pilot frequency signal, first switching point, second switching point, search the switching point of down link, each time slot of up link; Also be used to search the position of the training sequence code of each time slot, from the TD-SCDMA rf power signal, read the performance number of each time slot according to said position.
Preferably, the TD-SCDMA rf power signal that obtains of said sampling module is provided by chip ADC8314.
Wherein, said MCU also is used for transmitting to the tool terminal module performance number of each time slot that synchronization control module reads, the row format of going forward side by side conversion;
Said tool terminal module also is used for the performance number that receives the MCU transmission and shows, realizes man-machine interaction.
Can find out from above technical scheme; Technical scheme of the present invention is at first carried out the propagation delay time compensation; Then the TD-SCDAM rf power signal is sampled, search switching point, confirm the position of the training sequence code of each time slot at last; Thereby can accurately read the performance number of each time slot, and then can infer whether current network state or equipment state be good.
[description of drawings]
Fig. 1 is the sketch map of TD-SCDAM wireless frame structure among the present invention;
Fig. 2 is the basic flow sheet of the method for the single time slot power detection of the present invention;
Fig. 3 is the structured flowchart of the device of the single time slot power detection of the present invention.
[embodiment]
Below in conjunction with specific embodiment technical method of the present invention is described in detail.
For reaching goal of the invention, the present invention provides a kind of method of single time slot power detection, and as shown in Figure 1, this method comprises:
The performance number of each time slot is read in step 103, the position of searching the training sequence code (midamble) of each time slot from the TD-SCDMA rf power signal according to said position.
The propagation delay time compensation at first is set, obtains the power-frequency signal of whole radio frames then, search switching point, confirm the position of the training sequence code of each time slot at last, collection power information wherein just can read the power level of each time slot.After obtaining power level, just can analyze its corresponding network state in view of the above.Generally speaking, if detected power is undesired, often be exactly that network state or equipment state are not good.For example, if it is low to detect descending power output, it must influence coverage so, can infer analysis reason wherein in view of the above, such as causing reasons such as input power is low to cause owing to aerial angle changes.Whether generally speaking, detect the power of each time slot exactly, it is good to detect network state, and infers the bad reason of network.
Process for compensation of delay in the step 101; Can monitor the descending time slot signal by the tool terminal module; Time delay between base station and the repeater is set down, compensates the time difference of down link, down link again by the FPGA of synchronization control module according to this time slot; The delay compensation of up link can be calculated according to the delay compensation of down link.
The reason of carrying out compensation of delay is: because there is certain distance the base station between the link of repeater, there is certain delay in the ascending time slot signal that mobile phone sends, produces error when causing the ascending time slot power detection.Therefore, need be to lead of ascending time slot signal compensation.This lead can be provided with through monitoring, sends the FPGA of synchronization control module to, compensates up lead TA by FPGA, guarantees the accuracy of up-link power detected value.Down link compensation and up link are in like manner.
For the process of signal sampling, generally can rf power signal be provided through ADC8314, certainly, also can pass through other chips, also can realize such as ADC8313.A/D convertor circuit converts the TD-SCDMA rectified signal to digital signal, gives synchronization control module simultaneously.
For the process of searching switching point, generally can obtain the position of descending pilot frequency time slot, uplink and downlink switching point through software and radio technique.Simultaneously, also to find the switching point of up link, each time slot of down link, exactly each time slot is carried out the collection of power level.
In a preferred embodiment, synchronization control module is sought down-bound pilot frequency signal, first switching point, second switching point according to the time window principle, searches the switching point of down link, each time slot of up link simultaneously.
Seek the position of each switching point according to the time window principle, at first will confirm the particular location of descending pilot frequency time slot on time domain, will find corresponding characteristic window according to the time slot characteristic of TD.The data length that has of at first introducing the characteristic of TD time slot: TS0 is 848 chip lengths (662.5us), and the interval width between TS0 and the DwPTS is 48 chip lengths (37.5us), and the width of DwPTS is 64 chips (50us).According to this characteristic; The position that can on time domain, search this characteristic window through the mode that fast power detects; Thereby confirm the particular location of DwPTS on time domain: if detect the low level of continuous 48 chips; Detect the high level of continuous 64 chips again, then can confirm the position of characteristic window.
The key of searching the characteristic window is how to be provided with the reference value of low level and high level.Because the existence of external disturbance, the low level of time slot and high level all are to change relatively, so also should carrying out corresponding dynamic, the reference value of low level and high level changes, could find the characteristic window exactly.In each subframe of each TD-SCDMA, a protection time slot GP is all arranged, and the power of GP is minimum.According to this characteristic of GP, can the value of last GP be made as the low level reference value of characteristic window, on the basis of this low level reference value, on the low level reference value, add a constant according to device property and obtain the high level reference value.Confirmed after the reference value of low level and high level, just can the level of time slot have been detected, and then found the characteristic window.
It should be noted that the reference value that low level and high level are set not merely is limited to above-mentioned implementation method.For example, the high level reference value is set at first, deducts a constant then and obtain the low level reference value, also should be within protection scope of the present invention.
Confirm after the position of descending pilot frequency time slot,, can find the particular location of other time slots according to the distribution characteristics of TD-SCDMA subframe time slot.FPGA carries out the analysis of characteristic window to sampled power, searches down-bound pilot frequency signal, first switching point, second switching point according to the characteristic window matching way of threshold adaptive adjustment, searches the switching point of down link, each time slot of up link simultaneously.
For step 103, according to said switching point position, the performance number of each time slot is accurately read in the position of searching the training sequence code of each time slot in the TD-SCDMA rf power signal that ADC8314 provides according to said position.In each time slot, have only suitable stable of the performance number of training sequence code output, read the performance number of time slot, can accurately obtain the time slot power value of down link, up link at the training sequence code position.
As further improvement of the present invention, after step 103, can also comprise step 104; Synchronization control module sends the performance number of each time slot to the MCU circuit, carry out formula/algorithm process after, give the tool terminal module by the MCU circuit again.The tool terminal module can be the tool terminal module, is mainly used in to carry out man-machine interaction, can show detected performance number, further, can also utilize said performance number to carry out the subsequent control design.
The device that the present invention also provides a kind of single time slot power to detect, as shown in Figure 3, this device comprises: sampling module, be used to obtain the TD-SCDMA rf power signal and convert digital signal to, give synchronization control module; The tool terminal module is used to be provided with the delay compensation value between user-defined base station and the repeater and is sent to MCU; MCU is used for transmitting said delay compensation value to synchronization control module, and the data of transmission are carried out analyzing and processing; Synchronization control module is used for according to said time delay down link being compensated; Search down-bound pilot frequency signal, first switching point, second switching point, search the switching point of down link, each time slot of up link; Also be used to search the position of the training sequence code of each time slot, from the TD-SCDMA rf power signal, read the performance number of each time slot according to said position.
Wherein, said AD modular converter is realized by chip ADC7278.
When needs carried out man-machine interaction to detected performance number, said MCU also was used for transmitting to the tool terminal module performance number of each time slot that synchronization control module reads, and carries out protocol conversion, data transmission and processing; Said tool terminal module also is used for the performance number that receives the MCU transmission is shown, realizes man-machine interaction.
The above embodiment has only expressed several kinds of execution modes of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with accompanying claims.
Claims (7)
1. method that single time slot power detects is characterized in that this method may further comprise the steps:
A, the time delay between base station and the repeater is set, synchronization control module compensates according to the time difference of said time delay to up link, down link;
B, obtain the TD-SCDMA rf power signal and convert digital signal to, give synchronization control module; Search down-bound pilot frequency signal, first switching point, second switching point, search the switching point of down link, each time slot of up link;
The performance number of each time slot is read in C, the position of searching the training sequence code of each time slot from the TD-SCDMA rf power signal according to said position.
2. the method that single time slot power according to claim 1 detects is characterized in that, obtains signal in the said steps A and specifically comprises:
Obtain said rf power signal through ADC8314.
3. the method that single time slot power according to claim 1 detects is characterized in that search procedure specifically comprises among the said step B:
Said synchronization control module is searched down-bound pilot frequency signal, first switching point, second switching point according to the time window principle, searches the switching point of down link, each time slot of up link.
4. the method that detects according to each described single time slot power in the claim 1～3 is characterized in that, also comprises step after the said step C:
D, said synchronization control module send the performance number of each time slot to the MCU circuit, carry out format conversion after, give the tool terminal module by the MCU circuit again.
5. device that single time slot power detects is characterized in that this device comprises:
The tool terminal module is used to be provided with the delay compensation value between user-defined base station and the repeater and is sent to MCU;
Sampling module is used to obtain the TD-SCDMA rf power signal and converts digital signal to, gives synchronization control module;
MCU is used for transmitting said delay compensation value to synchronization control module, and the data of transmission are carried out analyzing and processing;
Synchronization control module is used for compensating according to the time difference of said time delay to up link, down link; Search down-bound pilot frequency signal, first switching point, second switching point, search the switching point of down link, each time slot of up link; Also be used to search the position of the training sequence code of each time slot, from the TD-SCDMA rf power signal, read the performance number of each time slot according to said position.
6. the device that single time slot power according to claim 5 detects is characterized in that the TD-SCDMA rf power signal that said sampling module obtains is provided by chip ADC8314.
7. according to the device of claim 5 or 6 described single time slot powers detections, it is characterized in that:
Said MCU also is used for transmitting to the tool terminal module performance number of each time slot that synchronization control module reads, the row format of going forward side by side conversion;
Said tool terminal module also is used for the performance number that receives the MCU transmission and shows, realizes man-machine interaction.
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| CN101374021B (en) * | 2008-08-29 | 2012-12-26 | 深圳国人通信有限公司 | Synchronization control method for covering TD-SCDMA repeater station signals |
| CN103297065B (en) * | 2012-02-23 | 2016-06-29 | 中兴通讯股份有限公司 | A kind of method of adjustment of hard emulator and radio-frequency receiving-transmitting sequential thereof |
| CN109802731B (en) * | 2017-11-17 | 2021-06-18 | 维沃移动通信有限公司 | Wireless link monitoring method, mobile communication terminal and network side equipment |
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| CN1315808A (en) * | 2000-03-27 | 2001-10-03 | 信息产业部电信科学技术研究院 | Small-region initial search method for CDMA digital mobile communication system |
| CN1581999A (en) * | 2003-08-06 | 2005-02-16 | 大唐移动通信设备有限公司 | Gain control method for community initial search in TD-SCDMA mobile communication system |
| CN1964209A (en) * | 2006-11-27 | 2007-05-16 | 武汉虹信通信技术有限责任公司 | A method to realize time division synchronous CDMA repeater power saving |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1315808A (en) * | 2000-03-27 | 2001-10-03 | 信息产业部电信科学技术研究院 | Small-region initial search method for CDMA digital mobile communication system |
| CN1581999A (en) * | 2003-08-06 | 2005-02-16 | 大唐移动通信设备有限公司 | Gain control method for community initial search in TD-SCDMA mobile communication system |
| CN1964209A (en) * | 2006-11-27 | 2007-05-16 | 武汉虹信通信技术有限责任公司 | A method to realize time division synchronous CDMA repeater power saving |
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| JP特开2006-135642A 2006.05.25 |
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