CN101409902B - Method for measuring TD-SCDMA network by GSM/TD-SCDMA dual-mode terminal working in GSM mode - Google Patents
Method for measuring TD-SCDMA network by GSM/TD-SCDMA dual-mode terminal working in GSM mode Download PDFInfo
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- CN101409902B CN101409902B CN2008102272537A CN200810227253A CN101409902B CN 101409902 B CN101409902 B CN 101409902B CN 2008102272537 A CN2008102272537 A CN 2008102272537A CN 200810227253 A CN200810227253 A CN 200810227253A CN 101409902 B CN101409902 B CN 101409902B
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Abstract
The invention provides a method for a GSM/TD-SCDMA double-mode terminal working under a GSM mode to measure a TD-SCDMA network. The method comprises the steps as follows: A. under the idle state of GSM and under the service state of GSM, an idle frame and a latest time slot of a frame before the idle frame receive and store TD-SCDMA data; and B. the measurement on received signal strength instruction (RSSI) and received signal code power (RSCP) is carried out according to the stored TD-SCDMA data. The invention can measure the TD-SCDMA network, no matter GSM is under the service state or under the idle state, and therefore, when a TD-SCDMA network signal is stronger, the TD-SCDMA network is automatically switched to the TD-SCDMA mode.
Description
Technical field
The invention belongs to the communications field, particularly a kind of GSM/TD-SCDMA dual-mode terminal is operated in the method for under the GSM pattern TD-SCDMA network being measured.
Background technology
Under the multiple mobile communications network and the situation of depositing, concerning terminal, support that automatic bimodulus or multimode are extremely important.
GSM/TD-SCDMA (global system for mobile communications/TDS-CDMA system) is dual-mode terminal automatically, be meant that a terminal supports GSM and two kinds of network schemers of TD-SCDMA simultaneously, it can make a choice automatically according to environment and business demand, which network can provide better service and service quality, and just automatic switchover or gravity treatment are under that network schemer.In order to realize automatic switchover and the sub-district gravity treatment between the bimodulus, terminal is an important assurance to the accurate measurement of another pattern in one mode.
For automatic dual-mode terminal, if terminal is operated under the TD-SCDMA network schemer usually, the RSSI (indication of received signal intensity) that needs monitoring GSM network, if terminal works under the GSM network schemer, need be measured the RSSI and the RSCP (received signal code power) of TD-SCDMA network.
Existing method is under the idle condition of GSM, just the TD-SCDMA network is measured.Because GSM is in idle condition, dual-mode terminal has sufficient time to receive the TD-SCDMA data, and directly carries out various measurements according to the TD-SCDMA data that receive.The shortcoming of prior art is, under the service condition of GSM owing to the TD-SCDMA network is not measured, and if this moment the TD-SCDMA network quality better than GSM network quality, dual-mode terminal can not in time switch to the TD-SCDMA pattern.
Summary of the invention
Technical problem to be solved by this invention provides a kind of GSM/TD-SCDMA dual-mode terminal and is operated in the method for under the GSM pattern TD-SCDMA network being measured, no matter GSM is in service condition or idle condition, can both measure the TD-SCDMA network, thereby when the TD-SCDMA network signal is strong, automatically switch to the TD-SCDMA pattern.
For solving the problems of the technologies described above, it is as follows to the invention provides technical scheme:
A kind of GSM/TD-SCDMA dual-mode terminal is operated in the method for under the GSM pattern TD-SCDMA network being measured, and comprises the steps:
A, in the idle condition of GSM, and last time slot of the idle frame under the gsm service state and the previous frame of this idle frame receives also storage TD-SCDMA data;
B, carry out the measurement of received signal intensity indication (RSSI) and received signal code power (RSCP) according to the TD-SCDMA data of described storage.
Above-mentioned method, wherein, step B specifically comprises:
B1, carry out synchronous detecting, obtain the position and the descending synchronous code (SYNC-DL) of descending pilot frequency time slot (DwPTS) according to the TD-SCDMA data of described storage;
B2, judge whether success of synchronous detecting, if, enter step B3, otherwise, the measurement result of RSSI and RSCP is made as invalid value, and stops this measurement;
B3, calculate the RSSI on the DwPTS, and obtain the training sequence Midamble data on the TSO;
B4, obtain the basic Midamble sequence number on the TSO;
B5, according to described Midamble data and Midamble sequence number, calculate the RSCP on the Primary Common Control Physical Channel (P-CCPCH).
Above-mentioned method wherein, also comprises after the step B3:
According to described Midamble data computation expectation receiving gain, the receiving gain of judging current use and the absolute value of the difference of expectation receiving gain whether in preset range, if, enter step B4, otherwise, the measurement result of RSSI and RSCP is made as invalid value, and stops this measurement.
Above-mentioned method, wherein, expect that according to the power calculation of described Midamble data receiving gain specifically comprises:
Set the Midamble Data Receiving power target value on the TSO;
Calculate the power that the TSO that receives goes up the Midamble data;
Calculate TSO and go up the power of Midamble data and the difference of received power desired value, obtain amount of gain adjustment;
Deduct described amount of gain adjustment with current receiving gain and obtain expecting receiving gain.
Above-mentioned method, wherein, described preset range obtains by test, and specifically comprises:
To connect by cable between signal source and the receiver;
Signal source sends the TD-SCDMA data, and TSO is last only to send data on preceding two code channels;
Receiver receives data, and obtains the actual reception power P of receiver antenna port by tester;
Set different receiving gains one by one, and carry out RSCP and measure;
Find the receiving gain scope [G1, G2] that meets RSCP measure error area requirement;
Look into the receiving gain G0 that the receiving gain calibration chart obtains received power P correspondence, with [T1, T2] as described preset range, T1=G1-G0 wherein, T2=G2-G0.
Above-mentioned method, wherein, described step B carries out on the backstage of described dual-mode terminal.
Compared with prior art, the present invention (comprising: in the idle condition of GSM at the idle period of GSM, and, last time slot of the idle frame under the gsm service state and the previous frame of this idle frame), terminal receives the TD-SCDMA data, and it is stored, then, at the TD-SCDMA data of each subframe of storing, carry out the measurement of received signal intensity indication (RSSI) and received signal code power (RSCP) respectively on the backstage.So, make measurement to the TD-SCDMA network not be subjected to the restriction of time length of the idle period of GSM, can utilize Limited resources to obtain GSM exactly to the needed measured value of TD-SCDMA sub-district gravity treatment/switch.
Description of drawings
Fig. 1 is gsm service channel 26 frame multi-frame structure figure;
Fig. 2 is TD-SCDMA subframe structure figure;
Fig. 3 is the method for measurement flow chart of the embodiment of the invention 1;
Fig. 4 is the method for measurement flow chart of the embodiment of the invention 2.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the accompanying drawings and the specific embodiments.
Fig. 1 has described the multi-frame structure figure of Traffic Channel among the GSM, and Traffic Channel is used the multi-frame structure of 26 subframes, the length overall 120ms of multi-frame among the GSM.An idle frame (seeing the Idle frame among the figure) is all arranged in per 26 subframes.The frame length of GSM is 4.615 milliseconds of ≈ (120/26 millisecond), and the frame of a GSM comprises 8 basic time slots, and a time slot accounts for the 4.615/8=0.577 millisecond altogether.
Fig. 2 has described the subframe structure figure of TD-SCDMA; each subframe length of TD-SCDMA is 5 milliseconds; comprise 7 business time-slots; a descending pilot frequency time slot; a protection time slot; with a uplink pilot time slot, the descending synchronous code that terminal can utilize descending pilot frequency time slot to comprise finds sync bit, and BCH (broadcast channel) is always by preceding two code channels carrying on the TSO.
Portable terminal is under different GSM mode of operation, data rate and configuring conditions, and the GSM mode wireless resource that takies is different.But whatsoever under the situation, at last time slot of the previous frame of GSM idle frame and this idle frame, be the transmitting-receiving that does not need to carry out GSM mode wireless data, length is 9/8*4.615 millisecond=5.19 millisecond.This part can be used for the reception of TD-SCDMA system cell signal, portable terminal can receive the data of a complete TD-SCDMA system subframe (5 milliseconds of length) like this, comprise P-CCPCH (Primary Common Control Physical Channel) data and descending pilot frequency code data on the time slot 0 (TSO) that needs in the measurement, according to the measurement of these data realizations to this TD-SCDMA system cell.
With reference to Fig. 3, the GSM/TD-SCDMA dual-mode terminal of the embodiment of the invention is operated in the method for under the GSM pattern TD-SCDMA network being measured, and comprises the steps:
Step 301: in the idle condition of GSM, and last time slot of the idle frame under the gsm service state and the previous frame of this idle frame receives and storage TD-SCDMA data;
When terminal works under the GSM pattern, when need measuring the TD-SCDMA system cell, terminal can be received measurement message, comprises frequency point information to be measured in this message, frequency perhaps to be measured and cell information.Terminal switches to TD-SCDMA frequency to be measured at the idle period of GSM with reception antenna, receives the data of a TD-SCDMA system subframe lengths, and is stored in the memory cell of terminal.Certainly,, in a measuring period, can dispatch the measurement of a plurality of frequencies and a plurality of sub-districts, promptly can receive the TD-SCDMA sub-frame data of a plurality of frequencies, perhaps, receive a plurality of TD-SCDMA sub-frame datas of same frequency if GSM is in idle condition.
After terminal receives the TD-SCDMA data, earlier it is stored, then,, carry out the measurement of received signal intensity indication (RSSI) and received signal code power (RSCP) respectively on the backstage at the TD-SCDMA data of each subframe of storing.So, make measurement to the TD-SCDMA network not be subjected to the restriction of time length of the idle period of GSM, can guarantee that measurement result is relatively accurate.
That is to say that follow-up step 302～308 are carried out on the backstage by terminal.
Step 302: the TD-SCDMA data according to described storage are carried out synchronous detecting, obtain the position and the descending synchronous code (SYNC-DL) of descending pilot frequency time slot (DwPTS);
Two kinds of situations are arranged:, directly synchronous in this cell detection if contain the descending synchronous code information of sub-district to be measured in the measurement message of receiving; If do not contain the descending synchronous code information of sub-district to be measured in the measurement message of receiving, need in 32 all descending synchronous code sequences of TD-SCDMA system, carry out synchronous detecting, obtain descending synchronous code information.
Step 305: calculate the RSSI on the DwPTS, and obtain training sequence (Midamble) data on the TSO;
After the success,, can extrapolate the Midamble code position of TSO synchronously, and obtain TSO and go up the Midamble data according to the subframe structure of synchronizing information and TD-SCDMA system.
Step 306: obtain the basic Midamble sequence number on the TSO;
Two kinds of situations are arranged:, then do not need to carry out the detection of basic Midamble sequence number again if comprise the basic Midamble information of sub-district to be measured in the measurement message of receiving;
If there is not the basic Midamble information of sub-district to be measured in the measurement message of receiving, call the Midamble testing process, carry out basic Midamble and detect (promptly from pairing four the Middamble sign indicating numbers of descending synchronous code, picking out target Middamble sign indicating number).
Step 307:, calculate the RSCP on the Primary Common Control Physical Channel (P-CCPCH) according to described Midamble data and Midamble sequence number;
This RSCP be TSO go forward two code channels the sign indicating number power.
Step 308: reporting measurement result.
Be with the difference of embodiment 1, after success synchronously, also, determine whether to carry out the measurement of RSCP by judging whether the receiving gain of current use is accurate.Efficiency of measurement and precision so, have further been improved.
With reference to Fig. 4, the GSM/TD-SCDMA dual-mode terminal of the embodiment of the invention is operated in the method for under the GSM pattern TD-SCDMA network being measured, and comprises the steps:
Step 401: in the idle condition of GSM, and last time slot of the idle frame under the gsm service state and the previous frame of this idle frame receives and storage TD-SCDMA data;
Step 402: the TD-SCDMA data according to described storage are carried out synchronous detecting, obtain the position and the descending synchronous code (SYNC-DL) of descending pilot frequency time slot (DwPTS);
Step 403～404: judge whether success of synchronous detecting, if, enter step 405, otherwise, the measurement result of RSSI and RSCP is made as invalid value, and stops this measurement;
Step 405: calculate the RSSI on the DwPTS, and obtain training sequence (Midamble) data on the TSO;
Step 406～408: according to described Midamble data computation expectation receiving gain, whether the absolute value of the receiving gain of judging current use and the difference of expectation receiving gain is in preset range, if, enter step 409, otherwise, the measurement result of RSSI and RSCP is made as invalid value, and stops this measurement;
After the success,, can obtain the Midamble data segment on the TSO (time slot 0) synchronously according to the subframe structure of synchronizing information and TD-SCDMA system.At first set the Midamble Data Receiving power target value on the TSO, calculate the power that the TSO that receives goes up the Midamble data, calculate TSO then and go up the power of Midamble data and the difference of received power desired value, obtain amount of gain adjustment, deduct described amount of gain adjustment with current receiving gain at last and obtain expecting receiving gain.
Utilize Midabmle data on the TSO to calculate RSCP on the P-CCPCH (Primary Common Control Physical Channel), this RSCP is the go forward sign indicating number power of two code channels of TSO.Synchronizing process is carried out on descending pilot frequency time slot (DwPTS), and the measurement of RSCP is to obtain on TSO, have difference power between DwPTS and the TSO, this difference power is relevant for the power configuration of these two time slots with network segment, and is also relevant with total code channel number of the last measurement period of TSO.Under synchronous case of successful, because accurately measuring needed reception data amplitude scope, RSCP is different from the required data amplitude scope of synchronous success, also might can not get RSCP result accurately.
Therefore, whether the absolute value of the present invention by the receiving gain of judging current use and the difference of expecting receiving gain be in preset range, whether the receiving gain of determining current use meets the demands, and then determines whether that need carry out RSCP at this measures and report.
Described preset range can obtain by test or method of emulation, is that example describes to obtain preset range by method of testing below: signal source is connected by cable with terminal receiver; Signal source sends the TD-SCDMA data, and TSO is last only to send data on preceding two code channels, and at this moment the time slot power on the TSO equates with RSCP; Receiver receives data, obtains the actual reception power P of receiver antenna port by tester; Set different receiver gain values then one by one, and carry out RSCP and measure; Find the receiving gain scope [G1, G2] that meets RSCP measure error area requirement; Look into the receiving gain G0 that the receiving gain calibration chart can obtain received power P correspondence, just can obtain described preset range: [T1, T2], T1=G1-G0 wherein, T2=G2-G0.
In the actual measurement process, after correctly obtaining synchronizing information, frame structure according to TD-SCDMA obtains upward Midamble partial data of TSO, at first can calculate the power that TSO goes up the Midamble part, calculates receiving gain (promptly the expecting receiving gain) G on the TSO then
NewWith receiving the used gain G of these frame data
CurrentDeduct G
NewObtain difference DELTA G=G
Current-G
NewJudge Δ G then whether in preset range [T1, T2], if, then carry out the measuring process of step subsequent, otherwise, think that calculating RSCP result under this gain can not satisfy the certainty of measurement requirement, this does not carry out RSCP measures, measurement result newspaper invalid value.
Step 409: obtain the basic Midamble sequence number on the TSO;
Step 410:, calculate the RSCP on the Primary Common Control Physical Channel (P-CCPCH) according to described Midamble data and Midamble sequence number;
Step 411: reporting measurement result.
Should be noted that at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spiritual scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (4)
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| CN2008102272537A CN101409902B (en) | 2008-11-25 | 2008-11-25 | Method for measuring TD-SCDMA network by GSM/TD-SCDMA dual-mode terminal working in GSM mode |
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| CN2008102272537A CN101409902B (en) | 2008-11-25 | 2008-11-25 | Method for measuring TD-SCDMA network by GSM/TD-SCDMA dual-mode terminal working in GSM mode |
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| CN101808345B (en) * | 2010-03-18 | 2012-10-03 | 展讯通信（上海）有限公司 | Method for measuring TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) cell in GSM (Global System for Mobile Communication) mode and dual-mode terminal |
| US20110280140A1 (en) * | 2010-05-17 | 2011-11-17 | Tom Chin | Alternate Transmission Scheme for High Speed Packet Access (HSPA) |
| CN101951635B (en) * | 2010-09-16 | 2013-10-02 | 展讯通信（上海）有限公司 | Multi-card multi-standby communication device and gain tracking method of non-business card |
| CN101977411A (en) * | 2010-10-20 | 2011-02-16 | 中兴通讯股份有限公司 | Communication method and communication device of double-network double-standby terminal |
| CN101977409A (en) * | 2010-10-20 | 2011-02-16 | 中兴通讯股份有限公司 | Communication method and device for double-network double-standby terminal |
| CN101977410A (en) * | 2010-10-20 | 2011-02-16 | 中兴通讯股份有限公司 | Method and device for dual-network and dual-standby terminal to perform communication |
| CN102098250A (en) * | 2011-01-26 | 2011-06-15 | 意法·爱立信半导体（北京）有限公司 | Frequency offset processing method and device for multi-mode terminal |
| CN103024770A (en) * | 2011-09-21 | 2013-04-03 | 意法-爱立信有限公司 | Dual-mode terminal and measuring method thereof |
| CN103200589B (en) * | 2012-01-05 | 2018-03-13 | 中兴通讯股份有限公司 | Up channel interference monitoring method and device |
| CN103582180B (en) * | 2012-07-23 | 2018-05-01 | 联发科技股份有限公司 | Communication device and scheduling method of radio activities |
| CN102932737B (en) * | 2012-10-24 | 2017-07-25 | 广州中道电子科技有限公司 | A kind of methods, devices and systems for obtaining positional information |
| CN103228006B (en) * | 2013-05-20 | 2016-05-11 | 李文龙 | A kind of multi-module radio terminal |
| CN105846921A (en) * | 2016-03-18 | 2016-08-10 | 深圳市金立通信设备有限公司 | Sub-frame processing method, related devices and system |
| US10972199B2 (en) | 2017-09-08 | 2021-04-06 | Huawei Technologies Co., Ltd. | RSSI measurement method, network device, and terminal device |
| CN109039493B (en) * | 2017-09-08 | 2020-06-16 | 华为技术有限公司 | RSSI measurement method, network equipment and terminal equipment |
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