CN1486098A - Dual mode terminal device and community searching method - Google Patents
Dual mode terminal device and community searching method Download PDFInfo
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- CN1486098A CN1486098A CNA021372047A CN02137204A CN1486098A CN 1486098 A CN1486098 A CN 1486098A CN A021372047 A CNA021372047 A CN A021372047A CN 02137204 A CN02137204 A CN 02137204A CN 1486098 A CN1486098 A CN 1486098A
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Abstract
The invention refers to a kind of honeycomb mobile communication system, especially refers to double mode end point device and the plot searching method. It includes the first honeycomb alignment communication system, the second honeycomb wireless communication system. The character lies in: it includes the control part which can control the second wireless communication system, and base station control device BSC1 for the first honeycomb mobile communication system, and the base station control device BSC2 for the second system; the base station configuration recording the first line communication system and the correspondence relation of the second wireless communication system, and the data bank which uses carrier frequency. It applies to PDC/UMTS, PHS/UMTS, WLAN/UMTS, FWA/UMTS communication system, and uses the information data of mobile terminal.
Description
One. technical field
The present invention relates to a kind of cell mobile communication systems, more specifically be meant dual mode terminal device and small region search method, be applicable to PDC/UMTS.PHS/UMTS。WLAN/UMTS。Mobile communication system such as FWA/UMTS, the location information data of use portable terminal can improve carrier frequency search and Cell searching speed, reduces the consumed power of portable terminal.
Two. technical background
The small region search method of present W-CDMA/UMTS cell mobile communication systems is by (1) slot synchronization, (2) frame synchronization and definite scrambler group, and (3) determine that three steps such as scrambler form.
The detailed description of present technology is documented in: the first half of list of references (Vol.18, No.8, pp.1470-1482, August 2000 for Cell Search in W-CDMA, IEEEJournal on Selected Areas in Communications).
In Figure 16, present 3 step small region search methods are processing of following 3 steps.
The 1st step (acceptance of basic synchronization channel)
By matched filter the signal of basic synchronization channel (P-SCH:Primary Synchronization Channel) is carried out counter diffusion, seek the time averaging maximum output peak value of signal correlation values.As shown in figure 17, the signal of P-SCH, the time slot that the base station is sent carries out synchronously (as 1 time slot N=10 symbol), just determines the receiving position of P-SCH.The timing of whole channels of a base station transmission is to carry out synchronous with the timing of P-SCH.The P-SCH receiving position that here obtains is that the slot timing of whole channel of sending with the base station that sends P-SCH is identical.
The 2nd step (S-SCH perhaps receives S-SCH and P-SCH the time)
According to the slot synchronization in the 1st step, detect with the displacement correlator on the transmitting channel of base station frame regularly, and definite in view of the above scrambler group is dwindled the in-scope of scrambler
When reducing the scope, in each slot timing, use the auxiliary synchronous code (auxiliary synchronous code) that comprises in the combination of the auxiliary synchronous code of representing the scrambler group successively, auxiliary synchronization channel (auxiliary synchronization channel) S-SCH (Secondary Synchronization Channel) is carried out coherent detection.At this moment by the correlation performance number be that the scrambler group is determined in maximum auxiliary synchronous code (auxiliary synchronous code) combination, this is relevant regularly be exactly frame synchronization regularly
The 3rd step (reception of common pilot channel CPICH)
According to the scrambler group that in the 2nd step, obtains and frame synchronization regularly, with the displacement correlator, use candidate's scrambler to calculate relevant with common pilot channel CPICH successively, and focus on the scrambler of this related power.Here common pilot channel CPICH is made of scrambler and chnnel coding two repeated codes.But, when doing the counter diffusion processing, it can be omitted because the employed chnnel coding of common pilot channel is all to be " 0 " or all be the channel coding schemes of " 1 ".
During the needed time average of each above step was handled, it is relatively good that the equalization time of accuracy of detection is grown, but used that the processing time is long.According to the trade-off relation between accuracy of detection and the processing speed, it be that high speed handles is again the implementation method of high Precision Detection that hope can have a kind of.
In addition, the searching method of carrier frequency is after powering up, and sets the employed frequency of each operator, and received signal judges whether to be exactly this carrier frequency with the signal of receiving in the past.Therefore, the search of carrier frequency also needs considerable time.
For example, in the GSM/UMTS dual-mode terminal, when gsm system is in holding state, because the caller of UMTS system, called is inchoate after UMTS transmission circuit power-up state, so not only will be on carrier frequency search and Cell searching spended time, compare with the common monotype terminal or the dual-mode terminal of two system's standbies simultaneously, long problem existence of response time is arranged.
The judgement of carrier frequency search in the past is according to the RSSI under the set carrier frequency (Received SignalStrength Indicator), perhaps Cell searching, position login whether success or the like is judged as standard, but, no matter in which kind of determination methods, all must carry out initialization to the frequency of each setting.
Figure 15 is the flow chart of example of the processing of carrier frequency search.
In Figure 15 kind, be to set carrier frequency (the 1501st step) at first, reception is being done initialization process (the 1502nd step) afterwards, judge set frequency and practical carrier frequency whether consistent (the 1503rd goes on foot).If consistent, exactly with the frequency that sets; If inconsistent words are changed the frequency of setting (the 1504th step), got back to for the 1501st step.The whether consistent criterion of the frequency that sets and actual carrier frequency normally, the signal strength signal intensity RSSI that on the frequency that sets, receives, Cell searching, successfully whether position login or the like.Therefore, according to the difference of criterion, the initialization process of doing in order to receive in the 1502nd step will be different.
In addition, amount of calculation and consumed power that the portable terminal that has a position detection means of oneself spends in Cell searching are all very big, and the search of carrier frequency also needs long time.
Three. summary of the invention
The present invention is in order to address the deficiencies of the prior art, and shortens the carrier frequency search and the Cell searching time method is a purpose for dual-mode terminal device and small region search method provide.
For this reason, dual mode terminal device of the present invention comprises first cellular radio communication system, second cellular radio communication system, the control part body that can control two cellular radio communication systems in addition.
In dual mode terminal device of the present invention, the base station data storehouse that has the carrier wave frequency information data of the corresponding relation of base station configuration of the 1st wireless communication system and the 2nd wireless communication system and use, base station IDs according to the 1st wireless communication system, contrast this base station data storehouse, obtain with it the information data of the carrier frequency of corresponding subsidiary communications system geographically, after the wireless portion of the 2nd wireless communication system powers up, based on the carrier frequency in the information data of this carrier frequency, be set in the frequency synthesizer, start the 2nd wireless communication system.Therefore do not need the search of carrier frequency.
Dual-mode terminal device and small region search method among the present invention, the base station configuration that has the base station configuration of the 1st wireless communication system and the 2nd wireless communication system corresponding relation geographically and the base station data storehouse of the information data of the carrier frequency of use, for the 2nd wireless communication system, set the scrambler of public synchronization codes in all base stations (searching code) and certain base station, these scramblers are divided into a plurality of scrambler groups, set the combination of specific scrambler group and auxiliary synchronous code (auxiliary synchronous code) (searching code), from the base station, send signal going up by basic synchronization channel (search channel) that synchronization codes constituted and by the auxiliary synchronization channel (search channel) that auxiliary synchronous code (auxiliary synchronous code) is constituted.Obtain the base-station-related information data with corresponding geographically the 2nd wireless communication system of base station IDs of first wireless communication system, the related operation by received signal and synchronization codes detects slot timing.By common pilot channel with according to determining in the information data of foregoing the 2nd wireless communication system that scrambler carries out related calculation, determine frame in the slot timing of calculating in front regularly.Therefore, when having deleted the related operation with auxiliary synchronization channel, obtain frame easily regularly.
Dual-mode terminal device and small region search method among the present invention, the base station configuration that has the base station configuration of the 1st wireless communication system and the 2nd wireless communication system corresponding relation geographically and the base station data storehouse of the information data of the carrier frequency of use, for the 2nd wireless communication system, set the scrambler of public synchronization codes in all base stations (searching code) and certain base station, these scramblers are divided into a plurality of scrambler groups, set the combination of specific scrambler group and auxiliary synchronous code (auxiliary synchronous code) (searching code), from the base station, send signal going up by basic synchronization channel (search channel) that synchronization codes constituted and by the auxiliary synchronization channel (search channel) that auxiliary synchronous code (auxiliary synchronous code) is constituted.Obtain the base-station-related information data with corresponding geographically the 2nd wireless communication system of base station IDs of first wireless communication system, the related operation by received signal and synchronization codes detects slot timing.Each slot timing of synchronous front, an auxiliary synchronous code (auxiliary synchronous code) that is comprised in auxiliary synchronous code (auxiliary synchronous code) combination to whole auxiliary synchronous code (auxiliary synchronous code) of each time slot or this base station is carried out counter diffusion, its result is put into (yardage of auxiliary synchronous code) * matrix of (timeslot number of 1 frame) or the matrix of (yardage of the auxiliary synchronous code that combination comprised of foregoing auxiliary synchronous code) * (timeslot number of 1 frame).According to the corresponding assist in synchronization code combination of scrambler in the pairing scrambler group in the base station of the 2nd wireless communication system, suppose that each time slot is first time slot, related power separately in the foregoing matrix is added up, first time slot that has the largest cumulative related power as first frame, and is detected frame synchronization.Thus, in the 3rd processing that goes on foot of affirmation processing of having deleted other scrambler groups and Cell searching, obtained frame easily regularly.
In the dual-mode terminal device and small region search method among the present invention, when using candidate's slot timing can not successfully detect the frame timing, use other candidate's slot timing successively, the duplicate detection frame is regularly till frame is regularly successfully detected.Therefore, can detect frame definitely regularly.
In the dual-mode terminal device and small region search method among the present invention, according to the size of the relevant output of matched filter, order from big to small uses candidate's slot timing to detect frame regularly.Therefore, can detect frame efficiently regularly.
In the dual-mode terminal device and small region search method among the present invention,, obtain the up-to-date base station information data that write down in the base station data storehouse, be used to upgrade the base station data storehouse by using possible wireless communication system or wired communication system.Therefore, can remain the last state in base station data storehouse.
In addition, in the dual-mode terminal device among the present invention, the base station data storehouse can be preserved by the base station of the 1st wireless communication system, and by the 1st wireless communication system, informs the base station IDs and the carrier frequency of corresponding with it the 2nd wireless communication system geographically; Perhaps, the base station data storehouse also can be preserved by the network of the 1st wireless communication system, and by the 1st wireless communication system, informs the base station IDs and the carrier frequency of corresponding with it the 2nd wireless communication system geographically.
Four. description of drawings
The skeleton diagram of the dual-mode terminal device of [Fig. 1] the 1st example.
The module map of the dual-mode terminal device shown in [Fig. 2] Fig. 1.
The position relation concept figure of the 1st cellular system that the dual-mode terminal device of [Fig. 3] the 1st example is suitable for and the base station of the 2nd cellular system.
The form of the data structure in the base station data storehouse of [Fig. 4] expression the 1st example.
The carrier frequency of [Fig. 5] expression the 1st example detects, and sets the flow chart of handling.
The flow chart of the cell search process of [Fig. 6] expression the 1st example.
What [Fig. 7] represented is the module map of carrying out the circuit of cell search process among Fig. 6.
The process chart of the Cell searching of [Fig. 8] expression the 2nd example.
What [Fig. 9] represented is the module map of the circuit of the execution cell search process among Fig. 8.
Being to use of [Figure 10] expression in the module map of the matched filter of the 1st, the 2 example.
Being to use of [Figure 11] expression in the displacement correlator member of the 1st, the 2 example.
[Figure 12] expression be a displacement correlator in the displacement correlator member among Figure 11.
What [Figure 13] represented is the concept map of the matrix of (assisting the number of the sign indicating number of the sign indicating number same period) * (timeslot number in 1 frame) in the 1st, the 2 example.
Each scrambler group in [Figure 14] the 1st, the 2 example and each time slot auxiliary same period sign indicating number mapping table.
The flow chart that [Figure 15] carrier frequency search is in the past handled.
The flow chart of [Figure 16] three step small region search methods in the past.
The concept map of the composition of the frame of the transmission signal in [Figure 17] three step small region search methods in the past
Five, embodiment
[the 1st example]
What Fig. 1 represented is the sketch plan of the dual-mode terminal device of the 1st example, Fig. 2 is the module map of the dual-mode terminal device in the presentation graphs 1, Fig. 3 is the position relation concept figure of dual-mode terminal when being applicable to the base station of the 1st cellular system and the 2nd cellular system of the 1st example, Fig. 4 is the form of data structure in the base station data storehouse of expression the 1st example, Fig. 5 is that the carrier frequency of the 1st example detects, sets the flow chart of handling, and Fig. 6 is the flow chart of the small region search method of the 1st example.Fig. 7 is a circuit module figure of carrying out cell search process.
As shown in Figure 1, dual-mode terminal device 1 of the present invention is also controlled with the opening and closing of the power supply of 4 pairs of cellular radio machines 2,3 noted earlier of control assembly when carrying out the control whole to the 1st cellular radio machine the 2, the 2nd cellular radio machine 3 and this dual-mode terminal device 1.Control assembly 4 can power up the 1st, the 2nd cellular radio machine 2,3.
With reference to Fig. 2, describe among the present invention formation in detail corresponding to the dual-mode terminal device of the 1st cellular radio Communication system and the 2nd cellular radio Communication system.
In cellular radio machine 2, receive the signal that cellular basestation sends from antenna 332, import to receiving-member 352 by the public device 342 of antenna.Then, after carrying out high-frequency gain on the high-frequency gain device 362, import to receiving mixer 372.In receiving mixer, the part from frequency synthesizer 402 is sent signal and carry out frequency translation, on demodulator 392, carry out demodulation through intermediate-frequency gain device 382.Received signal after the demodulation of self is carried out signal processing on the received signal circuit 422 of base band signal process parts 412, export to receiver 432 by multiplexer 4021.
On cellular radio machine 3, the signal that the cellular basestation that is received by antenna 333 sends is imported to receiving-member 353 through the public device 343 of antenna.Then after carrying out high-frequency gain on the high-frequency gain device 363, to receiving mixer 373 inputs, 373 kinds the part from frequency synthesizer 403 is sent signal and carry out frequency translation accepting frequency mixer, on demodulator 393, carry out demodulation through intermediate-frequency gain device 383.On the received signal circuit 423 of base band signal process parts 413, carry out signal processing for the received signal after the demodulation of self, export to receiver 432 by multiplexer 4021.
On the other hand, the output of selector 4022 has been connected to transmission signal processing circuit 453, after the processing that sends signal processing circuit, to transmit block 463 outputs.That is: the output signal that sends signal processing circuit 453 has been carried out after the modulation treatment on modulation device 473, add output signal from foregoing frequency synthesizer 403, and by after the frequency translation that sends frequency mixer 483, deliver to and carry out gain process on the transmission power gain device 493, by the public device 343 of foregoing antenna, send signal to this cellular basestation again from antenna 333 noted earlier.
To receiver 432 outputs, 4022 of selectors will be selected one of transmission signal processing circuit 452 or 453 to multiplexer 4021, as the outbound course of microphone 442 with one of output signal of selective reception signal processing circuit 422,423.
In control device 4, the 50th, carry out the main central processing unit (host CPU) of the control of whole this dual-mode terminal device, the 51st, be used for the ROM of storage control program and self-defining constant, the 52nd, be used for the RAM that program is carried out, the 53rd, store the erasable ROM (EEPROM) such as Flash Memory that various parameters and form class data are used, the 54th, carry out to keyboard 55 controls and to the CPU of display unit 56 outputs, the 57th, the cellular receiver device power control component of the mains switch of control the 1st cellular radio machine 2, the 58th, the cellular receiver device power control component of the mains switch of control the 2nd cellular radio machine 3, more than the base band signal process parts 412 of each building block and foregoing cellular receiver, 413, carry out mutual connection by bus 59.
The 60th, the base station data storehouse that the back will be said is kept among Flash Memory or the EEPROM, and the 61st, this dual-mode terminal and outside data interface of carrying out exchanges data.By this data interface 61 new database more.
Control device 4 is carried out the control to following action: the sequential control that cellular radio machine 2 and 3 reception send; Receive the modulation that sends signal, receive the control that sends agreement; Also carry out following processing: the received information of cellular radio machine 2,3 or various information of user etc. are shown to the processing that the said display device 56 in front gets on.Various information data from the keyboard input are shown to the processing that display unit 56 gets on, the processing of exporting to the Base-Band Processing parts 412,413 of cellular radio machine from the data of keyboard 55 inputs, to the processing of the power control component 57,58 of cellular radio machine, and other are to the control action of whole radio communication device.
The dual-mode terminal device that has the cellular radio machine 2,3 of power control component 57,58 like this can power only for the cellular radio machine 2 or 3 of employed cellular radio Communication system separately.Other radio equipment 3 or 2 can place sleep state.Therefore, can reduce consumed power significantly.
In Fig. 3, arranged the base-station control apparatus BSC1 of the 1st cellular radio Communication system and the base-station control apparatus BSC2 of the 2nd cellular radio Communication system, in each wireless communication system, defined sub-district separately respectively.The sub-district of the 1st cellular radio Communication system is A1, and the sub-district of k, the 2nd cellular radio Communication system is A2, k, A2, k+1,, A2, k+2; Corresponding set base station is BS1, k, BS2, k, BS2, k+1, BS2, k+2; Base station BS 1, k is controlled by the 1st cellular radio Communication system base-station control apparatus BSC1; BS2, k, BS2, k+1, BS2, k+2 is controlled by the 2nd cellular radio Communication system base-station control apparatus BSC2.
Fig. 2 60 in stored the base station data storehouse shown in Fig. 4, based on the sub-district ID of the 1st cellular radio Communication system, can determine the 2nd cellular radio Communication system sub-district ID and carrier frequency.
In Fig. 4, each the sub-district ID of the 1st cellular radio Communication system and the corresponding relation of a plurality of sub-districts in corresponding with it geographically the 2nd cellular radio Communication system have been represented.The sub-district ID and the carrier frequency of each sub-district of the 2nd cellular radio Communication system are stored.The sub-district ID of the 1st cellular radio Communication system represents with #1 ~ #N among the figure, the sub-district ID #R1 of the 2nd cellular radio Communication system, and #R2, #R3 represent, carrier frequency f1, f2, f3 represents.Other some information datas also in the base station data storehouse, have been preserved.When the 1st cellular radio machine 2 in the dual-mode terminal device 1 switches to the 2nd cellular radio Communication machine 3,, can determine the sub-district of the 2nd corresponding geographically cellular radio machine 3 rapidly with reference to the base station data storehouse.Thus, former carrier frequency search just can not wanted.
Explain with Fig. 3, the sub-district A1 of the 1st cellular radio Communication system, the sub-district of pairing the 2nd cellular radio Communication system is sub-district A2 on the k geography, k, A2, k+1, A2, k+2.
In Fig. 5, when carrying out carrier frequency search processing, before this sub-district ID of the 1st cellular radio Communication system was searched (StepS501) in the base station data storehouse with the base station data storehouse.The carrier frequency (f1, f2, f3 or the like) that detects the 2nd cellular radio Communication system thus (StepS502).The carrier frequency of here finding is set in the 2nd cellular radio machine 3 and goes.
If found when searching in database in the multiple carrier frequency, setpoint frequency like that repeatedly in the flow process as shown in figure 15 just is till consistent with the carrier frequency of reality.But if the sub-district adjacent with CDMA Cellular System, therefore the same carrier frequency of use handles still will reduce a lot than carrier frequency search in the past.
What Fig. 5 represented is the process chart of the Cell searching of dual-mode terminal device 1.
StepS601: after detecting slot timing, successively a plurality of (jmax) candidate's slot timing is used for the frame timing detection.The ordinal position that is used in frame candidate regularly as j, and is reduced it in turn.The initial value of the ordinal position of the slot timing that uses in StepS601 is 1.
StepS602: the basic synchronization channel P-SCH that in portable terminal, receives, by matched filter it is carried out counter diffusion, detect the candidate of slot timing, preserve (slot synchronization).
StepS603: the candidate of the candidate's of detected time slot set j related power in StepS602 is used in frame goes in regularly.
StepS604: at StepS602, when StepS603 carried out, dual-mode terminal device 1 was with reference to the base station data storehouse.
StepS605: the dual-mode terminal device detects the sub-district with corresponding geographically the 2nd cellular radio Communication system of sub-district ID of the 1st cellular radio Communication system from the base station data storehouse.
StepS606: by StepS604 and StepS605, dual-mode terminal device 1 can be determined the signal of base station (determining scrambler) that accept.Thus, can determine and detect frame regularly by operable scrambler.
StepS607: dual-mode terminal device 1 is to use the scrambler of determining in StepS606, on the slot timing of selecting in StepS603, with the displacement correlator common pilot channel CPICH or other control channels is carried out related operation.Detect frame regularly (frame synchronization) thus.
StepS608: on dual-mode terminal device 1, when slot timing of being selected by StepS607 and scrambler were corresponding, the frame synchronization success did not have corresponding the time then frame synchronization failure.Whether successful judgment frame is synchronously in StepS608, and in the frame synchronization success, this processing just can stop.
StepS609: on dual-mode terminal device 1, in the time of the frame synchronization failure, then continue to judge whether all other candidate's slot timing is suitable for the frame timing detection.
StepS610: in StepS609 among the whole slot timing candidate, found that existing operable slot timing waits, after the execution error information processing, stopped existing processing.
StepS611: when the candidate of whole slot timings all can not be fit in StepS609, dual-mode terminal device 1 added " 1 " with " j " and gets back to S603 and continue.
Such dual-mode terminal device 1 can according to directly definite base station of the data in base station data storehouse and carrier frequency, determine that like this processing of carrier frequency is simpler more and quick than technology when the 2nd cellular radio Communication system moves in the past.And scrambler determine and the parallel processing slot timing has been placed to here, the step of the 2nd in the Cell searching originally just can not wanted, so the processing speed of integral body has improved.
What Fig. 7 represented is the module map of the Cell searching circuit of dual mode device 1.
Have in this circuit: the matched filter 301 of the received signal Sin of W-CDMA base band (the composite phase signal that has comprised same-phase phase place and orthogonal phase place) as input signal, and displacement correlator 302, go back handlebar and determine the scrambling code generator of the scrambler of parts 210 from sub-district (base station) as input.
Matched filter 301 detects slot synchronization from the diffusion symbol of basic synchronization (search) channel P-SCH, the output S01 of matched filter 301 is input to the Power arithmetic circuit, and the signal power of the relevant output of each Chip (Sample) is carried out computing.The output S02 of Power arithmetic circuit 304 is input to add circuit 305 again, the S03 as a result of add circuit 305 is input in the memory 306, the output of memory 306 feeds back to add circuit 305 again, add the output S02 of Power arithmetic iodine rate 304, promptly, with the time slot is the cycle, and the Chip (Sample) of the correspondence of each time slot is carried out integration to the output S02 of Power arithmetic circuit 304 in turn, is kept at memory 304.Memory 306 is calculated coherent signal power integrated value or its mean value within a certain period of time, outputs in the detection part 307 of slot timing.
Slot timing detection part 307 detects the time integral of coherent signal power or the peak-data of its mean value, detects slot synchronization by the timing of this peak value.Selecting a plurality of slot timings as candidate Tj thus, is order on average with signal power from big to small, is input in the displacement correlator 302, detects frame regularly.
May include in each slot timing from different signal of base station, with sub-district (base station) determine parts 210 also corresponding not the base station also might exist.Here will determine slot timing according to the success or not of frame timing detection.
Output Sssc1, the Sssc2 of the corresponding correlator that respectively is shifted of the scrambler of the 1st ~ the n phase place ... Ssscn, be connected respectively to Power arithmetic circuit 3011 ~ 301n, calculate respectively the correlator that respectively is shifted output Sssc1, Sssc2 ... the signal power S081 of Ssscn ~ S08n.These signal powers are input to add circuit 3081,3082 ... 308n, and the output S061 ~ S06 of add circuit is input to memory 3091 ~ 309n again, the output of memory 3091 ~ 309n feeds back to add circuit 3081 ~ 308n, add the output S081 ~ S08n of Power arithmetic circuit, that is: the integrated value calculated successively of signal power S081 ~ S08n is deposited among memory 3091 ~ 309n.
Output Sssc1, the Sssc2 of the correlator that respectively is shifted of the 1st ~ the n phase place ... Ssscn, the composite phase signal of all being made up of same-phase phase place and orthogonal phase place respectively, what Power arithmetic circuit 3101 ~ 310n carried out is corresponding same-phase phase place and orthogonal phase multiplication 2 computing of addition again.
The success or not of frame synchronization all will be feeding back to slot timing detection part 307 from frame timing detection part 311.
Like this, because scrambler determines that by the sub-district (base station) of the 2nd cellular radio Communication system parts 210 directly set, this processing load will lighten, and consumed power is also very little.
In addition, scrambling code setting and slot timing candidate's individual processing adds parallel processing, can improve processing speed like this.Though in this example, n the displacement correlator of way use to(for) the scrambler of n phase place only has been described.It also is possible using the method for 1 above n following displacement correlator serial process.
[the 2nd example]
Shown in Figure 8 is the flow chart of the cell search process of the 2nd example.The module map of the circuit of the cell search process of execution graph 8 that shown in Figure 9 is.
Because the dual-mode terminal device in the 2nd example is identical with the 1st example (Fig. 1,2), the position relation of base station is identical with the 1st example (Fig. 3), and the base station data storehouse is also identical with the 1st example (Fig. 4), so omit these diagrams, explanation.
The cell search process of Fig. 8 is as described below;
StepS801: after detecting slot timing, successively a plurality of (jmax) candidate's slot timing is used for the frame timing detection.The ordinal position that is used in frame candidate regularly as j, and is reduced it in turn.The initial value of the ordinal position of the slot timing that uses in StepS801 is 1.
StepS802: the basic synchronization channel P-SCH that in portable terminal, receives, by matched filter it is carried out counter diffusion, detect the candidate of slot timing, preserve (slot synchronization).
StepS803: the candidate of the candidate's of detected time slot set j related power in StepS802 is used in frame goes in regularly.
StepS804: at StepS802, when StepS803 carried out, dual-mode terminal device 1 was with reference to the base station data storehouse.
StepS805: by StepS804 and StepS805, dual-mode terminal device 1 can be determined the signal of base station (determining scrambler) that accept.Thus, can determine and detect frame regularly by operable scrambler.
StepS806: the dual-mode terminal device is determined the corresponding scrambler of sub-district D with the 2nd cellular radio Communication system from the base station data storehouse.
StepS807: determine the affiliated scrambler group that in StepS806, obtains.
StepS808: the dual-mode terminal device use expression by StepS807 the combination of auxiliary synchronous code of definite scrambler group, on the slot timing of in StepS803, choosing, to each time slot with the displacement correlator to auxiliary synchronous code SSC[1] ~ SSC[q] carry out related operation.Detect frame regularly (frame synchronization) thus.
StepS809: on dual-mode terminal device 1, when slot timing of being selected by StepS603 and scrambler were corresponding, the frame synchronization success did not have corresponding the time then frame synchronization failure.Whether successful judgment frame is synchronously in StepS609, and in the frame synchronization success, this processing just can stop.
StepS810: on dual-mode terminal device 1, in the time of the frame synchronization failure, then continue to judge whether all other candidate's slot timing is suitable for the frame timing detection.
StepS811: in StepS810 among the whole slot timing candidate, found that existing operable slot timing waits, after the execution error information processing, stopped existing processing.
StepS812: when the candidate of whole slot timings all can not be fit in StepS810, dual-mode terminal device 1 added " 1 " with " j " and gets back to S803 and continue.
Such dual-mode terminal device 1, owing to carrying out frame synchronization by definite scrambler group, the processing of Cell searching is simpler more and quick than technology so in the past.And scrambler determine and the parallel processing slot timing has been placed to here, so whole processing speed has improved.
In Fig. 9,, omitted detailed explanation because some part identical or suitable with Fig. 7 has been used identical symbol.
Have matched filter 301 and the displacement correlator 302 of input received signal Sin (the composite phase signal that contains same-phase phase place and orthogonal phase place), that input is shifted correlator is auxiliary synchronous code SSC[1] ~ SSC[q].
Matched filter 301 detects slot synchronization from the diffusion symbol of basic synchronization (search) channel P-SCH, the output S01 of matched filter 301 is input to the Power arithmetic circuit, and the signal power of the relevant output of each Chip (Sample) is carried out computing.The output S02 of Power arithmetic circuit 304 is input to add circuit 305 again, the S03 as a result of add circuit 305 is input in the memory 306, the output of memory 306 feeds back to add circuit 305 again, add the output S02 of Power arithmetic iodine rate 304, promptly, with the time slot is the cycle, and the Chip (Sample) of the correspondence of each time slot is carried out integration to the output S02 of Power arithmetic circuit 304 in turn, is kept at memory 304.Memory 306 is calculated coherent signal power integrated value or its mean value within a certain period of time, outputs in the detection part 307 of slot timing.
Slot timing detection part 307 detects the time integral of coherent signal power or the peak-data of its mean value, detects slot synchronization by the timing of this peak value.Selecting a plurality of slot timings as candidate Tj thus, is order on average with signal power from big to small, is input in the displacement correlator 302, detects frame regularly.
Auxiliary synchronous code SSC[1 with displacement correlator 302] ~ SSC[q] output A[1] ~ A[q], be input to related power accumulation arithmetic unit 901, calculate the related power accumulated value of the combination of the pairing auxiliary synchronous code of scrambler group.For same scrambler group, calculate related power accumulated value with the assist in synchronization code combination of this first time slot of time slot supposition position.
The output of related power accumulation arithmetic unit 901 is used for the regularly input of detection part 311 of frame, and first time slot of related power accumulated value maximum as frame regularly according to the success or not that frame regularly detects, can be determined slot timing.
What Figure 10 was represented is the module map of the 1st, the 2 employed matched filter of example.The module map of the employed displacement correlator of the 1st, the 2 example that Figure 11 is represented.What Figure 12 represented is the module map of a displacement correlator in the displacement correlator.
Among Figure 10, matched filter MF is the relevant device of high speed of carrying out the stagewise correlated sequence.Matched filter MF1, MF2 are connected in series to form.Matched filter MF1 has m mlultiplying circuit M11 ~ M1m, in turn input signal Si n is postponed delay circuit D11 ~ D1 of input mlultiplying circuit M11 ~ M1m, and m-1 carries out the add circuit ADD1 of add operation etc. to the output signal of mlultiplying circuit M11 ~ M1m.
On the other hand, matched filter MF2 has m mlultiplying circuit M21 ~ M2m, in turn input signal Si n is postponed delay circuit D21 ~ D2 of input mlultiplying circuit M21 ~ M2m, m-1 carries out the add circuit ADD1 of add operation etc. to the output signal of mlultiplying circuit M21 ~ M2m.Is input signal Si n Sin (i) as discrete time series signal indication, and the output S01 of matched filter MF is represented by formula (1) SOI (t)=∑ * P (imod) * C (idium).Here, synchronization codes PSC is made up of the sequence P1 ~ Pm and the sequence C 1 ~ Cm of stagewise correlated sequence.Though be that cycle according to sequence P1 ~ Pm and sequence C 1 ~ Cm is identical illustrating, the situation of different cycles also is fine.
Shown in Figure 11 is the module map of displacement correlator 302.For received signal Sin, a plurality of displacement correlator SC1 ~ SCn are formed by connecting side by side.Be respectively each displacement correlator setting diffusion symbol separately.This diffusion symbol is Ssc1 ~ Sscn in the 1st example, then is auxiliary synchronous code SSC[1 in the 2nd example] ~ SSC[q].
Figure 12 represents, and to be a representational displacement correlator SC1. received signal be made up of same-phase phase place (I phase: be expressed as SinI) and orthogonal phase place (Q mutually: be expressed as SinQ), and displacement correlator SC1 carries out related operation to each phase place respectively.
Have mlultiplying circuit MI1 and mlultiplying circuit MI2 among the displacement correlator SC1 about the I phase of input signal, mlultiplying circuit MI1 carries out the I multiplying mutually to received signal SinI with the diffusion symbol of time series successively, and what mlultiplying circuit MI2 carried out for hundred million times is the Q multiplying mutually of received signal SinI with the diffusion symbol of time series.
Displacement correlator SC1 also has mlultiplying circuit MQ1 and the mlultiplying circuit MQ2 about the Q phase (SinQ) of input signal, mlultiplying circuit MQ1 carries out the Q multiplying mutually to received signal SinQ with the diffusion symbol of time series successively, and what mlultiplying circuit MQ2 carried out for hundred million times is the I multiplying mutually of received signal SinQ with the diffusion symbol of time series.The output of the output of mlultiplying circuit MI1 and mlultiplying circuit MQ1 is through the add operation of add circuit ADDI, its addition results outputs to integration-Dump circuit I NDI and calculates the Sssc1I as a result of related operation, the output of the output of mlultiplying circuit MI2 and mlultiplying circuit MQ2 is through the add operation of add circuit ADDQ, and its addition results outputs to integration-Dump circuit I NDQ and calculates the Sssc1Q as a result of related operation.
In first example, after generating, the diffusion symbol is input to mlultiplying circuit MI1 in scrambler generative circuit 303, MI2, MQ1 goes among the MQ2.But said diffusion symbol refers to auxiliary synchronous code in second example.
Figure 13 is represented is to make output result's the matrix that frame synchronization detects the storage displacement correlator of usefulness in second example.Output A[1 as a result] ~ A[q] (complex data) be saved in the memory, for example respectively with time series: for output A[1 as a result], just A[1,1] ~ A[1, M] the complex data of M (timeslot number in the frame) preserve.By the combination of the element in this matrix, on each time slot, do the add operation of related power.Wherein, the line number of the matrix of Figure 13 is identical with the number of auxiliary synchronous code (q), and columns is identical with timeslot number (M) in 1 frame.
Here, the 2nd algorithm that goes on foot to former Cell searching describes.The I of each element (complex data) from the matrix of Figure 13 obtains related power mutually with Q mutually, order according to the scrambler group, according to the combination (getting 1 auxiliary synchronous code by each time slot constitutes) of definite auxiliary synchronous code in advance of this specific scrambler group, the related power of every frame (M time slot) is carried out add operation.Then, for same scrambler group, once be shifted at the composite component of each time slot to auxiliary synchronous code.Carry out same computing for whole time slot phase places.That is to say,, obtain the accumulation related power of M kind for same scrambler group.For all scrambler groups, all carry out above-mentioned processing, obtain maximum accumulation related power, determine the scrambler group.The side-play amount of the combination of the auxiliary synchronous code of accumulation related power that in addition, can be by holding this maximum detects first time slot of frame.Thus, also can detect frame synchronization simultaneously.
Figure 14 represents is combination corresponding to the auxiliary synchronous code of scrambler group 1 ~ P.The line number of the matrix of representing among Figure 14 equates with the scrambler number, and columns equates with timeslot number (M) in 1 frame.
In second example of the present invention,, go on foot Comparatively speaking, have only the amount of calculation of 1/ scrambler group number in the past with the 2nd of Cell searching owing to determined the scrambler group.
This shows that the present invention can improve the processing speed of carrier frequency search and Cell searching by using the location information data of portable terminal, reduces the consumed power of portable terminal.About Cell searching, then can not want the step of the 3rd in the former technology, and can simplify the processing in the 2nd step significantly.
In addition, the present invention does not use special position detecting device just can obtain the information data of position, and according to this location information data setting carrier frequency, makes that frequency setting becomes possibility fast.
In addition, the present invention also is applicable to following purposes.
Solved the problem of user's close quarters of existing cellular system, in the big zone of communication flowss such as big city, introduced FWA systems such as WLAN, in suitable wireless communication system, switched.
During separately with other cellular system constructing systems, new system may be difficult to provide large-scale transition service when beginning at existing cellular system, if when beginning use dual-mode terminal device, just can comprehensively provide on a large scale and serve.
In the area of cellular system coexistences different more than 2, the dual-mode terminal device that can effectively use.Illustrated relevant from the 1st wireless communication system to the 2 wireless communication systems mobile in the above example, the detection of carrier frequency, contents such as Cell searching be need not go into the details, and the present invention is applicable to too from the 2nd wireless communication system moving to the 1st wireless communication system.
Claims (5)
1, a kind of dual mode terminal device and small region search method comprise the first honeycomb fashion alignment communication system, and second cellular radio communication system is characterized in that:
A, the base-station control apparatus BSC1 of the 1st cellular radio Communication system that is provided for the 1st cellular radio Communication system and the base-station control apparatus BSC2 that is used for the 2nd cellular radio Communication system of the 2nd cellular radio Communication system; Writing down the database of information data of the carrier frequency of the geographic corresponding relation of base station configuration of the base station configuration of the 1st wireless communication system and the 2nd wireless communication system and use.
B, cell searching mode 1: dual-mode terminal device and small region search method among the present invention, the base station configuration that has the base station configuration of the 1st wireless communication system and the 2nd wireless communication system corresponding relation geographically and the base station data storehouse of the information data of the carrier frequency of use, for the 2nd wireless communication system, set the scrambler of the public synchronization codes in all base stations (searching code) and definite base station, these scramblers are divided into a plurality of scrambler groups, set the combination of specific scrambler group and auxiliary synchronous code (auxiliary synchronous code) (searching code), from the base station, send signal going up by basic synchronization channel (search channel) that synchronization codes constituted and by the auxiliary synchronization channel (search channel) that auxiliary synchronous code (auxiliary synchronous code) is constituted.Obtain the base-station-related information data with corresponding geographically the 2nd wireless communication system of base station IDs of first wireless communication system, the related operation by received signal and synchronization codes detects slot timing.By common pilot channel with according to determining in the information data of foregoing the 2nd wireless communication system that scrambler carries out related calculation, determine frame in the slot timing of calculating in front regularly.Therefore, when having deleted the related operation with auxiliary synchronization channel, obtain frame easily regularly.
C, cell searching mode 2: dual-mode terminal device and small region search method among the present invention, the base station configuration that has the base station configuration of the 1st wireless communication system and the 2nd wireless communication system corresponding relation geographically and the base station data storehouse of the information data of the carrier frequency of use, for the 2nd wireless communication system, set the scrambler of the public synchronization codes in all base stations (searching code) and definite base station, these scramblers are divided into a plurality of scrambler groups, set the combination of specific scrambler group and auxiliary synchronous code (auxiliary synchronous code) (searching code), from the base station, send signal going up by basic synchronization channel (search channel) that synchronization codes constituted and by the auxiliary synchronization channel (search channel) that auxiliary synchronous code (auxiliary synchronous code) is constituted.Obtain the base-station-related information data with corresponding geographically the 2nd wireless communication system of base station IDs of first wireless communication system, the related operation by received signal and synchronization codes detects slot timing.Each slot timing of synchronous front, the auxiliary synchronous code (auxiliary synchronous code) that is comprised in auxiliary synchronous code (auxiliary synchronous code) combination to whole auxiliary synchronous code (auxiliary synchronous code) of each time slot or this base station carries out counter diffusion, its result is put into the matrix of (yardage of auxiliary synchronous code) x (timeslot number of 1 frame) or the matrix of (yardage of the auxiliary synchronous code that combination comprised of foregoing auxiliary synchronous code) x (timeslot number of 1 frame).According to the corresponding assist in synchronization code combination of scrambler in the pairing scrambler group in the base station of the 2nd wireless communication system, suppose that each time slot is first time slot, related power separately in the foregoing matrix is added up, first time slot that has the largest cumulative related power as first frame, and is detected frame synchronization.Thus, in the 3rd processing that goes on foot of affirmation processing of having deleted other scrambler groups and Cell searching, obtained frame easily regularly.
D, frequency search mode: base station data storehouse with carrier wave frequency information data of the corresponding relation of base station configuration of the 1st wireless communication system and the 2nd wireless communication system and use, base station IDs according to the 1st wireless communication system, contrast this base station data storehouse, obtain with it the information data of the carrier frequency of corresponding subsidiary communications system geographically, after the wireless portion of the 2nd wireless communication system powers up, based on the carrier frequency in the information data of this carrier frequency, be set in the frequency synthesizer, start the 2nd wireless communication system.Quicken the speed of carrier frequency search.
2, dual-mode device according to claim 1 and small region search method is characterized in that receiving the signal that cellular basestation sends from antenna 332 in cellular radio machine 2, import to receiving-member 352 by the public device 342 of antenna.Then, after carrying out high-frequency gain on the high-frequency gain device 362, import to receiving mixer 372.In receiving mixer, the part from frequency synthesizer 402 is sent signal and carry out frequency translation, on demodulator 392, carry out demodulation through intermediate-frequency gain device 382.Received signal after the demodulation of self is carried out signal processing on the received signal circuit 422 of base band signal process parts 412, export to receiver 432 by multiplexer 4021.
On cellular radio machine 3, the signal that the cellular basestation that is received by antenna 333 sends is imported to receiving-member 353 through the public device 343 of antenna.Then after carrying out high-frequency gain on the high-frequency gain device 363, to receiving mixer 373 inputs, 373 kinds the part from frequency synthesizer 403 is sent signal and carry out frequency translation accepting frequency mixer, on demodulator 393, carry out demodulation through intermediate-frequency gain device 383.On the received signal circuit 423 of base band signal process parts 413, carry out signal processing for the received signal after the demodulation of self, export to receiver 432 by multiplexer 4021.
On the other hand, the output of selector 4022 has been connected to transmission signal processing circuit 453, after the processing that sends signal processing circuit, to transmit block 463 outputs.That is: the output signal that sends signal processing circuit 453 has been carried out after the modulation treatment on modulation device 473, add output signal from foregoing frequency synthesizer 403, and by after the frequency translation that sends frequency mixer 483, deliver to and carry out gain process on the transmission power gain device 493, by the public device 343 of foregoing antenna, send signal to this cellular basestation again from antenna 333 noted earlier.
To receiver 432 outputs, 4022 of selectors will be selected one of transmission signal processing circuit 452 or 453 to multiplexer 4021, as the outbound course of microphone 442 with one of output signal of selective reception signal processing circuit 422,423.
In control device 4, the 50th, carry out the main central processing unit (host CPU) of the control of whole this dual-mode terminal device, the 51st, be used for the ROM of storage control program and self-defining constant, the 52nd, be used for the RAM that program is carried out, the 53rd, store the erasable ROM (EEPROM) such as Flash Memory that various parameters and form class data are used, the 54th, carry out to keyboard 55 controls and to the CPU of display unit 56 outputs, the 57th, the cellular receiver device power control component of the mains switch of control the 1st cellular radio machine 2, the 58th, the cellular receiver device power control component of the mains switch of control the 2nd cellular radio machine 3, more than the base band signal process parts 412 of each building block and foregoing cellular receiver, 413, carry out mutual connection by bus 59.The 60th, foregoing base station data storehouse is kept among Flash Memory or the EEPROM, and the 61st, this dual-mode terminal and outside data interface of carrying out exchanges data.By this data interface 61 new database more.
3, dual mode terminal device according to claim 1 and small region search method, its feature in the flow process of one of small region search method is.
StepS601: after detecting slot timing, successively a plurality of (jmax) candidate's slot timing is used for the frame timing detection.The ordinal position that is used in frame candidate regularly as j, and is reduced it in turn.The initial value of the ordinal position of the slot timing that uses in StepS601 is 1.
StepS602: the basic synchronization channel P-SCH that in portable terminal, receives, by matched filter it is carried out counter diffusion, detect the candidate of slot timing, preserve (slot synchronization).
StepS603: the candidate of the candidate's of detected time slot set j related power in StepS602 is used in frame goes in regularly.
StepS604: at StepS602, when StepS603 carried out, dual-mode terminal device 1 was with reference to the base station data storehouse.
StepS605: the dual-mode terminal device detects the sub-district with corresponding geographically the 2nd cellular radio Communication system of sub-district ID of the 1st cellular radio Communication system from the base station data storehouse.
StepS606: by StepS604 and StepS605, dual-mode terminal device 1 can be determined the signal of base station (determining scrambler) that accept.Thus, can determine and detect frame regularly by operable scrambler.
StepS607: dual-mode terminal device 1 is to use the scrambler of determining in StepS606, on the slot timing of selecting in StepS603, with the displacement correlator common pilot channel CPICH or other control channels is carried out related operation.Detect frame regularly (frame synchronization) thus.
StepS608: on dual-mode terminal device 1, when slot timing of being selected by StepS607 and scrambler were corresponding, the frame synchronization success did not have corresponding the time then frame synchronization failure.Whether successful judgment frame is synchronously in StepS608, and in the frame synchronization success, this processing just can stop.
StepS609: on dual-mode terminal device 1, in the time of the frame synchronization failure, then continue to judge whether all other candidate's slot timing is suitable for the frame timing detection.
StepS610: in StepS609 among the whole slot timing candidate, found that existing operable slot timing waits, after the execution error information processing, stopped existing processing.
StepS611: when the candidate of whole slot timings all can not be fit in StepS609, dual-mode terminal device 1 added " 1 " with " j " and gets back to S603 and continue.
4, dual mode terminal device according to claim 1 and small region search method, its feature in two flow process of small region search method is.
StepS801: after detecting slot timing, successively a plurality of (jmax) candidate's slot timing is used for the frame timing detection.The ordinal position that is used in frame candidate regularly as j, and is reduced it in turn.The initial value of the ordinal position of the slot timing that uses in StepS801 is 1.
StepS802: the basic synchronization channel P-SCH that in portable terminal, receives, by matched filter it is carried out counter diffusion, detect the candidate of slot timing, preserve (slot synchronization).
StepS803: the candidate of the candidate's of detected time slot set j related power in StepS802 is used in frame goes in regularly.
StepS804: at StepS802, when StepS803 carried out, dual-mode terminal device 1 was with reference to the base station data storehouse.
StepS805: by StepS804 and StepS805, dual-mode terminal device 1 can be determined the signal of base station (determining scrambler) that accept.Thus, can determine and detect frame regularly by operable scrambler.
StepS806: the dual-mode terminal device is determined the corresponding scrambler of sub-district D with the 2nd cellular radio Communication system from the base station data storehouse.
StepS807: determine the affiliated scrambler group that in StepS806, obtains.
StepS808: the dual-mode terminal device use expression by StepS807 the combination of auxiliary synchronous code of definite scrambler group, on the slot timing of in StepS803, choosing, to each time slot with the displacement correlator to auxiliary synchronous code SSC[1] ~ SSC[q] carry out related operation.Detect frame regularly (frame synchronization) thus.
StepS809: on dual-mode terminal device 1, when slot timing of being selected by StepS603 and scrambler were corresponding, the frame synchronization success did not have corresponding the time then frame synchronization failure.Whether successful judgment frame is synchronously in StepS609, and in the frame synchronization success, this processing just can stop.
StepS810: on dual-mode terminal device 1, in the time of the frame synchronization failure, then continue to judge whether all other candidate's slot timing is suitable for the frame timing detection.
StepS811: in StepS810 among the whole slot timing candidate, found that existing operable slot timing waits, after the execution error information processing, stopped existing processing.
StepS812: when the candidate of whole slot timings all can not be fit in StepS810, dual-mode terminal device 1 added " 1 " with " j " and gets back to S803 and continue.
5, dual mode terminal device according to claim 1 and small region search method is characterized in that using possible wireless communication system or wired communication system, obtain the up-to-date base station information data that write down in the base station data storehouse, are used to upgrade the base station data storehouse.Therefore, can remain the last state in base station data storehouse.
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| CN1303837C (en) * | 2004-09-27 | 2007-03-07 | 杭州斯达康通讯有限公司 | Double mode type mobile phone with PHS and VoWlan function |
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| CN100372437C (en) * | 2004-11-23 | 2008-02-27 | 华为技术有限公司 | High-speed group data network search method |
| CN100382464C (en) * | 2004-06-10 | 2008-04-16 | 大唐移动通信设备有限公司 | TD-SCDMA system cell code word planning method and method for searching composite code word combination thereof |
| CN100388857C (en) * | 2004-08-18 | 2008-05-14 | 华为技术有限公司 | Method for realizing charge share in wireless honeycomb network superposition covering area |
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| US5663957A (en) * | 1995-07-12 | 1997-09-02 | Ericsson Inc. | Dual mode satellite/cellular terminal |
| DE19742405A1 (en) * | 1997-09-25 | 1999-04-08 | Siemens Ag | Dual mode mobile phone |
| US6463054B1 (en) * | 1998-12-31 | 2002-10-08 | Telefonaktiebolaget Lm Ericsson | Retrieving cell information in an overlaid circuit switched and packet switched wireless telecommunication network |
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