CN100407607C - Method for deciding starting time of compression mode in different system measurement of CDMA system - Google Patents
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Abstract
The present invention provides a method for controlling a compression mode when a CDMA system carries out allo-system measurement. The present invention aims to cause a mobile station to obtain an allo-system measured value in transmission intervals of the compression mode exactly and rapidly when the CDMA system carries out the allo-system measurement, and thus, the usage time of the compression mod is reduced, and the service efficiency of the compression mode is enhanced so as to reduce the influence of the compression mode on the system. The present invention provides a method for determining the starting time of the compression mode, which causes the mobile station in the transmission intervals of the compression mode to accurately obtain the allo-system measured value, and enhances the success probability of the measurement; simultaneously, the present invention provides an adjusting method on the basis of determining the starting time of the compression mode, which ensures that the mobile station starts the compression mode rapidly to carry out the allo-system measurement after receiving commands of starting the compression mode, and reduces delaying.
Description
Technical field
The present invention relates to the isosystem measurement technology of communication system, the portable terminal that relates in particular in the cdma cellular mobile communication system carries out the method that the compressed mode and the decision compression mode starting moment are neutralized in the isosystem measurement time control.
Background technology
In traditional time division multiple access (TDMA) mobile communication system, time slot of the general every N Time Slot Occupancy of travelling carriage communicates, and be in " free time " state at other time slot, therefore travelling carriage can utilize these idle time slots that target frequency is measured, so that travelling carriage is to the channel conditions of network-reporting target frequency.But, be different from tdma system, code division multiple access (CDMA) cell mobile communication systems adopts code word to distinguish different user, the signal of the reception frequency that the user can be continuous always in time, and " idle time slot " that they do not have resembling among the TDMA measures different frequency.Therefore, for the travelling carriage that has only a receiver, if the base station continuously sends signal on down channel, travelling carriage will continuously receive downstream signal, can't measure the signal of different frequency simultaneously.Realize measurement, just must use downlink compression mode different frequency signals.
As shown in Figure 1, in compact model, in radio frames, form the transmission " space " of a period of time by technology such as sign indicating number punchings, in this section space, any data are not transmitted to travelling carriage in the base station, travelling carriage can be transformed into radio-frequency transmitter the target frequency that needs supervision, and target frequency is measured.Fig. 2 has represented the parameter of compressed mode pattern (Pattern).As can be seen, the size in transmission space (gap) and the length of relative position and pattern have determined a compressed mode pattern.
Compact model must cause bad influence to the performance of system if use frequently:
1) technology such as sign indicating number punching etc. has reduced the redundancy of data, according to information theory principle, in order to remedy this loss, data after the punching must be launched (as shown in Figure 1 with power P/t, wherein P is the transmitting power of condensed frame not, and t is a compression ratio), the increase of this power will influence the performance of system.
2) in compact model, can cause the transmitting power saltus step, the fluctuation that causes can reduce the performance of system.
3) compact model not only is used for the measurement to target frequency, also will be used for travelling carriage and target frequency and set up synchronously.Therefore, " space " time of compact model will be longer.
In view of above some harmful effect, in cdma system, thereby the usage frequency that reduces compact model reduce compact model to the influence of systematic function with most important.
Compact model is mainly used in different-frequency measure and isosystem measurement.When different system is a gsm system, and when travelling carriage has only a receiver, the travelling carriage that is in talking state to be switched to the gsm system from cdma system, at first will measure, obtain necessary information for travelling carriage switches to gsm system from cdma system to contiguous GSM sub-district.Because the frequency of gsm system and the frequency of cdma system are different, therefore must use compact model.In the compressed mode transmission space, travelling carriage is finished measurement to the GSM sub-district with frequency inverted to target GSM cell frequency.
The process that GSM measures is as follows:
(1) RSSI (Received Signal Strength Indicator) measures: at first moving table measuring is close to the value of GSM CBCH RSSI;
(2) initial BSIC (Base Station IdentifyCode) confirms to measure: mobile station in selecting is 8 the strongest base stations of RSSI wherein, catch synchronization burst SB (Synchronization Burst), decode base station identity code BSIC, obtain GSM sub-district observed time difference (Observed time difference to GSM cell).
In GSM, 51 frames are combined and are called one 51 multi-frame.On the GSM broadcast channel, one 51 multi-frame comprises 5 synchronization frames (SCH), apart is 10 frames between two adjacent synchronization frames.One frame is divided into 8 time slots, and SB takies the 1st time slot of synchronization frame, only contains 5 SB in one 51 multi-frame so.
Comprised the information that travelling carriage will obtain among the SB: the tdma frame of BSIC and reduction number.The tdma frame of reduction number has shown that this SB is which SB in 51 multi-frames, therefore can obtain the time started of 51 multi-frames at this SB place, and then obtain GSM sub-district observed time difference (Observed time difference to GSM cell), be defined as follows:
Observed time difference to GSM cell is defined as T
GSM-SFN=T
RxGSMj-T
RxSFNi, T wherein
RxSFNiBe meant the zero-time of the frame of SFN=0 on the P-CCPCH channel of CDMA cell i, SFN (System Frame Number) is P-CCPCH (Prime Common Control Physical Channel, Primary Common Control Physical Channel) frame counter can be used as the timing reference of all physical channels of CDMA; T
RxGSMjBe that carrier frequency is the time started of one 51 multi-frame on the CBCH of j in the gsm system, and be T
RxSFNiAfter time go up one 51 close multi-frame.If T
RxGSMjJust in time equal T
RxSFNi, T so
RxGSMj-T
RxSFNi=0.
(3) BSIC heavily confirms to measure:
After obtaining GSM sub-district observed time difference information,, also to constantly reaffirm the value of BSIC, upgrade GSM sub-district observed time difference information in order to safeguard this information.
Three kinds of different compressed mode pattern are used in the measurement of above three phases respectively.As can be seen, initial BSIC confirms that measurement and BSIC confirm that heavily the key of measuring is that requirement can capture synchronization burst SB, can obtain BSIC and GSM sub-district observed time difference information like this.But in a GSM51 multi-frame, being 235.385 milliseconds 5 SB are only arranged, thus can be very difficult to synchronization burst SB in the short time at transmission space IT, through the repeatedly repetition of compressed mode pattern, just may capture SB possibly.
In the prior art, confirming to measure GSM sub-district, back observed time difference information through initial BSIC obtains, carry out to utilize when BSIC heavily confirms to measure this initial timing information that has obtained to select proper compression pattern pattern so, make SB drop on as early as possible in the transmission space.But do not speak of and capture the method that SB finishes the GSM measurement fast how as early as possible.
In sum, how to make travelling carriage accurately and as quickly as possible capture synchronization burst SB, obtain BSIC and Observedtime difference to GSM cell, finishing BSIC fast heavily confirms to measure, thereby reduce the service time of compact model, improve the service efficiency of compact model, the minimizing compact model seems very important to the influence of systematic function.
Summary of the invention
Purpose of the present invention makes travelling carriage accurately and fast obtain the isosystem measurement value exactly when cdma system carries out isosystem measurement in the compressed mode transmission space, reduce the service time of compact model as far as possible, improve the service efficiency of compact model, thereby reduce the influence that compact model causes system.Proposed a kind of definite compressed mode pattern among the present invention and started method constantly, can make travelling carriage reach the purpose of quick measurement.
The present invention has provided a kind of definite compression mode starting method constantly, makes travelling carriage can obtain the isosystem measurement value accurately in the compressed mode transmission space, has improved the measurement probability of successful.The present invention has guaranteed that in the method for determining to have provided on the compression mode starting basis constantly a kind of adjustment travelling carriage just can start compact model rapidly and carry out isosystem measurement after receiving the order that starts compact model, has reduced delay.
The objective of the invention is to realize by following technological means, in the process of measure GSM sub-district, because in the process of measure GSM sub-district, initial base station identification code BSIC confirms to have obtained GSM sub-district observed time difference information after measurement is finished, at first utilize this time difference information to calculate the startup moment (TGCFN) that base station identity code BSIC heavily confirms to measure compact model, if the TGCFN that calculates is not equal to 255 less than the frame counter CFN (Connection FrameNumber) of current DPCH DPCH channel and the frame counter CFN of current DPCH DPCH, adjust TGCFN so up to frame counter CFN greater than current DPCH DPCH, thereby make travelling carriage start base station identity code BSIC fast and heavily confirm to measure compact model, and in the gap scope of compressed mode transmission space, accurately capture the synchronization burst SB of GSM sub-district, and then draw base station identity code BSIC by synchronization burst SB decoding, reach and finish the purpose that GSM measures fast.
TGCFN is drawn by following relational expression 1 and relational expression 2:
Relational expression 1:
TGSFN＝(TD
GSM+T
GSM_FRAME+N*10*T
GSM_FRAME+T
SB/2+R-TGL*T
CDMA_SLOT/2)/T
CDMA_FRAME
Relational expression 2:
TGCFN＝(TGSFN-TD
SFN-CFN)mod?256
In the relational expression 1, TD
GSMThe initial value of the GSM sub-district observed time difference (Observed time difference to GSM cell) that obtains after initial base station identification code BSIC confirms to measure is finished in expression;
T
GSM_FRAMERepresent the time that the GSM frame takies; N represents that the synchronization burst SB that captures is N synchronization burst SB in these GSM 51 multi-frames; The N value is 0 ~ 4;
(T
GSM_FRAME+ N*10*T
GSM_FRAME) represent that this synchronization burst SB is with respect to the GSM distance in the initial moment of 51 multi-frames; T
SBRepresent the time that synchronization burst SB takies;
The length of TGL (Transmission Gap Length) expression compressed mode transmission space gap; R represents the middle moment of synchronization burst SB and the middle effective range constantly of compressed mode transmission space gap, and R can just can bear;
T
CDMA_FRAMERepresent the time that the CDMA frame takies; A CDMA frame is formed T by 15 time slots
CDMASLOTThe time of a Time Slot Occupancy in the expression CDMA frame.
(TD
GSM+ T
GSM_FRAME+ N*10*T
GSM_FRAME+ T
SB/ 2+R-TGL*T
CDMA_SLOT/ 2) expression transmission space gap is with respect to the duration of SFN=0, divided by T
CDMA_FRAME, draw the frame number SFN of the Common Control Physical Channel P-CCPCH in the CDMA frame of gap place, compressed mode transmission space, i.e. TGSFN (Transmission Gap System Frame Number);
TD in the relational expression 2
SFN-CFNExpression SFN=0 constantly and the difference that exists constantly of CFN=0, this value with regard to definite, draws TGCFN according to relational expression 2 when Radio Link is set up in portable terminal and base station.
The concrete grammar of adjusting the value of TGCFN is:
In relational expression 1, N represents that the synchronization burst that captures is a N synchronization burst in these GSM 51 multi-frames, as N is 0 o'clock, the frame counter CFN of current DPCH DPCH is greater than TGCFN, then consider to catch the synchronization burst SB in next 256 frames, be about to N and add 1, calculate TGCFN according to described relational expression 1 and 2 again, if N adds the frame counter CFN of the current DPCH DPCH in 1 back still greater than TGCFN, consider to catch again next synchronization burst SB so; If can not catch 5 synchronization burst SB in nearest GSM 51 multi-frames of SFN=0, consider to catch the synchronization burst SB in next GSM 51 multi-frames so, the value of TGSFN is provided by following relational expression 3:
Relational expression 3:
TGSFN＝(TD
GSM+(M-1)*51*T
GSM_FRAME+T
GSM_FRAME+N*10*T
GSM_FRAME+T
SB/2+R-TGL*T
CDMA_SLOT/2)/T
CDMA_FRAME
Wherein M represents M GSM 51 multi-frames constantly with respect to SFN=0.
Can draw adjusted TGCFN by described relational expression 2 then:
TGCFN＝(TGSFN-TD
SFN-CFN)mod256
The result who carries out this adjustment is: the value by the TGCFN that obtains after adjusting is measured thereby travelling carriage can start compact model fast just greater than the value of the frame counter CFN of current DPCH DPCH.
When current C FN equaled 255, the value of the N that gets made the TGSFN that calculates just greater than TD in described relational expression 1
SFN- CFN, promptly TGCFN is not then adjusted in TGCFN＞=0.
When the frame counter CFN of current DPCH DPCH is not equal to 255, if the value of the N that gets makes the TGCFN value that the calculates value greater than the frame counter CFN of current DPCH DPCH in the described relational expression 1, then do not adjust TGCFN, otherwise if the TGCFN that calculates then needs to adjust TGCFN less than the value of the frame counter CFN of current DPCH DPCH.
Adopt CDMA mobile communication system of the present invention when carrying out isosystem measurement, can improve the service efficiency of compact model, significantly reduce the service time of compact model, reduce the influence of the use of compact model systematic function.And because travelling carriage generally is the border that is in cdma system and gsm system when carrying out isosystem measurement, quality of signals is poor, if pass through the delay of long period again, causes call drop probably.Therefore adopt the method that provides among the present invention, can reduce time of delay greatly, guarantee that starting compact model as soon as possible measures, and can obtain measured value again as soon as possible after starting compact model.Save valuable time for the travelling carriage that is in talking state switches to gsm system from cdma system, and then improved the probability of success of switching.
Description of drawings
Fig. 1: compact model frame structure and transmitting power schematic diagram;
Fig. 2: compressed mode pattern argument structure schematic diagram;
Fig. 3: the portable terminal of the embodiment of the invention and base station location distribution schematic diagram;
Fig. 4: among cdma system P-CCPCH channel and the GSM broadcast channel in time concern schematic diagram;
The sequential relationship schematic diagram of Fig. 5: CFN and TGCFN.
Embodiment
Further specify the present invention below in conjunction with drawings and Examples.
As shown in Figure 3, suppose that sub-district 1 is the CDMA sub-district, frequency is f1, and sub-district 2 is the GSM sub-district, and frequency is f2.Travelling carriage is arranged in sub-district 1.When travelling carriage when move sub-district 2 because sub-district 2 is different system GSM sub-districts, carries out GSM by travelling carriage and measure so the network decision starts compact model.When carrying out GSM sub-district BSIC when heavily confirming to measure, compression mode starting computational methods and method of adjustment constantly in according to the present invention, determine the startup moment of compact model, thereby start compact model fast, and capture synchronization burst SB as early as possible, and decode the value of BSIC, upgrade GSM sub-district observed time difference information, finish GSM and measure, obtain necessary information for travelling carriage switches to gsm system from cdma system.
If do not adopt the method among the present invention, and be to use compact model at random catch SB, so just can not guarantee the SB that captures that travelling carriage can success, and it is just littler to capture the probability of SB fast.Because this moment, travelling carriage was in the border of cdma system and gsm system, signal quality is generally poor, for being in the travelling carriage of talking state, if the time that GSM measures is long, travelling carriage just might have little time to switch in the gsm system call drop so.
Adopt the method among the present invention, can save Measuring Time greatly, and can success capture SB, obtain value and the GSM sub-district observed time difference information of BSIC.Adopt the method among the present invention, reduced the influence of compact model on the one hand to systematic function, reduced delay on the other hand greatly, saved valuable time in the gsm system for the poor travelling carriage of signal quality switches to, thereby reduced probability of call.
When adopting cdma system of the present invention to vicinity GSM cell measurement, among the CDMA among P-CCPCH channel and the GSM broadcast channel relation such as Fig. 4 in time represent that travelling carriage is finished the initial value that initial BSIC confirms to measure the GSM sub-district observed time difference (Observed time difference to GSM cell) that the back obtains and is made as TDGSM.Compressed mode transmission space IT to initial moment of SB be TRXSB.And to establish the moment that compression mode starting corresponds on the P-CCPCH constantly be TGSFN.The length in transmission space is TGL (transmission gap length).According to the 3GPP protocol requirement, constantly constantly must be just effective within a scope in the middle of the SB with the middle of transmission space gap, establishing this scope is R.
The 1st frame of GSM51 multi-frame is the FCCH frame, and the 2nd, 12,22,32,42 frames are synchronization frame.If the time of a GSM frame is TGSM_FRAME, because a frame comprises 8 time slots, synchronization burst SB is positioned at the 1st time slot of synchronization frame, the time T SB=TGSM_FRAME/8 that SB takies so.For cdma system, the time of establishing a CDMA frame is TCDMA_FRAME.A CDMA frame is made up of 15 time slots, and TCDMA_SLOT represents the time of a Time Slot Occupancy in the CDMA frame.The variation of TDGSM is very little in addition, can regard a known parameters as.
Therefore we can obtain following relational expression l:
TGSFN＝(TD
GSM+TGSM_FRAME+N*10*T
GSM_FRAME+T
SB/2+R-TGL*T
CDMA_SLOT/2)/T
CDMA_FRAME
Wherein the N value 0～4,5 SB in expression and nearest 51 multi-frames of SFN=0.R can just can bear.
Compact model is applied in descending DPCH (Dedicated Physical Channel, DPCH) on, CFN (Connection Frame Number) is the frame counter of DPCH channel, value is 0～255, and the frame number of Primary Common Control Physical Channel P-CCPCH is represented with SFN (System Frame Number), the SFN value is 0～4095, and all physical channels all with the P-CCPCH channel as timing reference.Therefore constantly have a time difference constantly with SFN=0 at CFN=0, this time difference is referred to as the SFN-CFN observed time difference, just obtains this time difference information when unlimited link is set up in travelling carriage and base station, is made as TDSFN-CFN.Therefore the relation between the initial moment TGCFN of compressed mode frame and the moment TGSFN that corresponds on the P-CCPCH has 2 establishments of following relational expression:
TGCFN＝(TGSFN-TD
SFN-CFN)mod?256
We have just calculated the startup moment of compact model like this.
After the moving moment of the startup that calculates compact model, also to enter and adjust compression mode starting algorithm flow constantly, specific as follows.
After travelling carriage is received the order of the startup compact model that network sends over, at first to compare the value of current C FN and TGCFN:
If current C FN is less than TGCFN, travelling carriage will start compact model constantly at TGCFN subsequently so;
If current C FN is greater than TGCFN, travelling carriage can only wait for that the TGCFN of next 256 frames starts compact model constantly so.For example current C FN is 8, and TGCFN equals 5, because that CFN equals moment of 5 is over and done with, can only equals moment of 5 at next CFN so and start compact model, because CFN from 0 to 255 cycle count.
Introduce the method for adjustment of TGCFN below, purpose is that travelling carriage just receives after the compact model order can very fast startup compact model, needn't wait for.
(1) consider the situation that current C FN equals 255:
In relational expression 1, the value of choosing N makes TGSFN get final product just greater than TDSFN-CFN.
(2) consider that current C FN is not equal to 255 situation:
In described relational expression 1, N 0 indicates to catch first SB in the GSM51 multi-frame, and N gets 0 earlier, greater than TGCFN, then considers to catch next SB as current C FN, is about to N and adds 1, calculates TGCFN according to described relational expression 1 and 2 again; If N is added to 5 SB that still can not catch in 51 nearest multi-frames of SFN=0 at 4 o'clock always, continuation considers to catch the SB in next 51 multi-frames so, and this moment, the value of TGSFN was provided by following relational expression 3:
TGSFN＝(TD
GSM+(M-1)*51*T
GSM_FRAME+T
GSM_FRAME+N*10*T
GSM_FRAME+T
SB/2+R-TGL*T
CDMA_SLOT/2)/T
CDMA_FRAME
Wherein M represents which 51 multi-frames of beginning to count from SFN=0.
Can draw TGCFN by relational expression 2 then.
Fig. 5 has represented the relation of current C FN and TGCFN, shows at transmission space gap IT to arrive the constantly nearest GSM synchronization burst SB from TGCFN.
By above method of adjustment, travelling carriage is received the wait that need not after the order that starts compact model through the long period, just can start compact model constantly at TGCFN following closely, capture the value that the tripping compressed mode starts constantly nearest SB and decodes BSIC, renewal Observed time difference to GSM cell, finishing BSIC rapidly heavily confirms to measure, reduce the service time of compact model, improve the service efficiency of compact model.
Claims (5)
1. determine compression mode starting method constantly when carrying out isosystem measurement in the cdma system, it is characterized in that, in the process of measure GSM sub-district, initial base station identification code BSIC confirms to have obtained GSM sub-district observed time difference information after measurement is finished, utilize this time difference information to calculate the startup moment TGCFN that base station identity code BSIC heavily confirms to measure compact model, if the TGCFN that calculates is not equal to 255 less than the frame counter CFN of current DPCH DPCH and the frame counter CFN of current DPCH DPCH, adjust TGCFN so up to frame counter CFN greater than current DPCH DPCH, thereby make travelling carriage start base station identity code BSIC fast and heavily confirm to measure compact model, and in the gap scope of compressed mode transmission space, accurately capture the synchronization burst SB of GSM sub-district, and then draw base station identity code BSIC by synchronization burst SB decoding.
2. determine compression mode starting method constantly when carrying out isosystem measurement in a kind of cdma system as claimed in claim 1, it is characterized in that described TGCFN is drawn by following relational expression 1 and relational expression 2:
Relational expression 1:
TGSFN＝(TD
GSM+T
GSM_FRAME+N*10*T
GSM_FRAME+T
SB/2+R-TGL*T
CDMA_SLOT/2)/T
CDMA_FRAME
Relational expression 2:
TGCFN＝(TGSFN-TD
SFN-CFN)mod?256
In the described relational expression 1, TD
GSMThe initial value of the GSM sub-district observed time difference that obtains after initial base station identification code BSIC confirms to measure is finished in expression;
T
GSM_FRAMERepresent the time that the GSM frame takies; N represents that the synchronization burst SB that captures is N synchronization burst SB in GSM 51 multi-frames;
(T
GSM_FRAME+ N*10*T
GSM_FRAME) represent that this synchronization burst SB is with respect to the GSM distance in the initial moment of 51 multi-frames; T
SBRepresent the time that synchronization burst SB takies;
TGL represents the length of compressed mode transmission space gap; R represents the middle moment of synchronization burst SB and the middle effective range constantly of compressed mode transmission space gap, and R can just can bear;
T
CDMA_FRAMERepresent the time that the CDMA frame takies; A CDMA frame is formed T by 15 time slots
CDMA_SLOTThe time of a Time Slot Occupancy in the expression CDMA frame;
(TD
GSM+ T
GSM_FRAME+ N*10*T
GSM_FRAME+ T
SB/ 2+R-TGL*T
CDMA_SLOT/ 2) expression transmission space gap is with respect to the duration of SFN=0, divided by T
CDMA_FRAME, draw the frame number SFN of the Common Control Physical Channel P-CCPCH in the CDMA frame of gap place, compressed mode transmission space, i.e. TGSFN;
TD in the described relational expression 2
SFN-CFNThe expression SFN=0 moment and the difference that CFN=0 exists constantly, draw TGCFN according to relational expression 2;
CFN represents the frame counter of DPCH DPCH;
SFN represents the frame number of Common Control Physical Channel P-CCPCH.
3. determine compression mode starting method constantly when carrying out isosystem measurement in a kind of cdma system as claimed in claim 2, it is characterized in that the concrete grammar of the value of described adjustment TGCFN is:
In described relational expression 1, N 0 indicates to catch first synchronization burst SB in GSM 51 multi-frames, N gets 0 earlier, as the frame counter CFN of current DPCH DPCH greater than TGCFN, then consider to catch next synchronization burst SB, be about to N and add 1, calculate TGCFN according to described relational expression 1 and 2 again; If N is added to 5 synchronization burst SB that still can not catch in nearest GSM 51 multi-frames of SFN=0 at 4 o'clock always, continuation considers to catch the synchronization burst SB in next GSM 51 multi-frames so, and this moment, the value of TGSFN was provided by following relational expression 3:
Relational expression 3:
TGSFN＝(TD
GSM+(M-1)*51*T
GSM_FRAME+T
GSM_FRAME+N*10*T
GSM_FRAME+T
SB/2+R-TGL*T
CDMA_SLOT/2)/T
CDMA_FRAME
Wherein M represents M GSM 51 multi-frames constantly with respect to SFN=0;
Can draw adjusted TGCFN by described relational expression 2 then;
TGCFN＝(TGSFN-TD
SFN-CFN)mod256。
4. determine compression mode starting method constantly when carrying out isosystem measurement in a kind of cdma system as claimed in claim 3, it is characterized in that, when the frame counter CFN of current DPCH DPCH equaled 255, the value of the N that gets made the TGSFN that calculates just greater than TD in described relational expression 1
SFN-CFN, promptly TGCFN is not then adjusted in TGCFN＞=0.
5. determine compression mode starting method constantly when carrying out isosystem measurement in a kind of cdma system as claimed in claim 3, it is characterized in that, the frame counter CFN of current DPCH DPCH is not equal at 255 o'clock, if the value of the N that gets makes the TGCFN value that the calculates value greater than the frame counter CFN of current DPCH DPCH in the described relational expression 1, then do not adjust TGCFN, if the TGCFN that calculates then needs to adjust TGCFN less than the value of the frame counter CFN of current DPCH DPCH.
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| CN100417283C (en) * | 2005-05-15 | 2008-09-03 | 华为技术有限公司 | Method and apparatus of switching between different systems |
| CN1988414B (en) * | 2005-12-22 | 2010-05-05 | 联芯科技有限公司 | Method for catching GSM adjacent small area synchronous channel and base station identification code reaffirming method |
| CN101087440B (en) * | 2006-06-06 | 2010-05-12 | 大唐移动通信设备有限公司 | A method for data adjustment in mobile communication system |
| CN101437242B (en) * | 2007-11-13 | 2010-12-15 | 联芯科技有限公司 | Method and apparatus for confirming base station district identification code of communications terminal |
| WO2012009850A1 (en) * | 2010-07-20 | 2012-01-26 | 中兴通讯股份有限公司 | Method and system for processing transmission gap pattern sequence |
| CN104581840B (en) * | 2013-10-12 | 2018-04-27 | 展讯通信（上海）有限公司 | Mobile terminal and its residence reselecting and device |
| CN104581841B (en) * | 2013-10-12 | 2018-07-27 | 展讯通信（上海）有限公司 | Mobile terminal and its residence reselecting and device |
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| WO1994029981A1 (en) * | 1993-06-14 | 1994-12-22 | Telefonaktiebolaget Lm Ericsson | Non-continuous transmission for seamless handover in ds-cdma systems |
| CN1112384A (en) * | 1993-06-14 | 1995-11-22 | 艾利森电话股份有限公司 | Non-continuous transmission for seamless handover in DS-CDMA systems |
| WO1997040593A1 (en) * | 1996-04-23 | 1997-10-30 | Telefonaktiebolaget Lm Ericsson (Publ) | Code-rate increased compressed mode ds-cdma systems and methods |
| CN1303550A (en) * | 1998-03-26 | 2001-07-11 | 三菱电机株式会社 | Spread spectrum communication device and spectrum communication method |
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| CN1464664A (en) | 2003-12-31 |
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