CN101242215B - Synchronous channel configuration method, cell search and access method in TDD system - Google Patents
Synchronous channel configuration method, cell search and access method in TDD system Download PDFInfo
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Abstract
The invention provides a synchronous channel configuration method in time division duplex system, in the method, basic synchronous channel and radio channel are allocated on the time division duplex system basic spectrum, at the same time, supplementary synchronization channel and radio channel are allocated on supplementary spectrum, wherein the supplementary spectrum is used in downlink transmission spectrum. In addition, the invention also provides a community search method, which can use the method of simultaneous channel configuration. Therefore, the invention sends the SCH signal and / or the BCH signal by a downlink spectrum excepted for the TDD basic spectrum, which breaks restriction which wireless frame structure cycle and frame structure up / down linefeed flexibility is to the number of the TDD system send-down SCH and BCH, thus greatly reducing time cost the TDD system in the community search.
Description
Technical field
The present invention relates to the communications field, and more particularly, relate to synchronous channel configuration method, small region search method and cell accessing method in a kind of tdd systems.
Background technology
Along with in mobile communication system, introduce be specifically designed to broadcasting frequency spectrum (for example, the Media FLO system that Qualcomm releases) and multimode terminal (for example, the GSM/TD-SCDMA terminal) appearance, mobile communications network and portable terminal to the use of frequency spectrum to variation, synthesization future development.Integrated using to paired and non-paired frequency spectrum, not only expanded the professional ability of system, also created condition for the performance of further raising system, for instance, by Integrated using TDD (Time DivisionDuplex, time division duplex) basic frequency spectrum and spread-spectrum can significantly improve the Cell searching performance of TDD system.
Cell initial searching process is also referred to as the cell initial synchronizing process, generally comprise PN (Pseudo-Noise, pseudo noise) code synchronously, sign synchronization and frame synchronization etc.At present, in 3-G (Generation Three mobile communication system), different systems has taked different cell initial simultaneous techniquess based on the unique property of self system.
CDMA2000 (Code Division Multiple Access, the code division multiple access access) system adopts the initial synchronisation technology similar with the IS-95 system, namely, by catching of pilot channel being set up the PN code synchronously and sign synchronization, and by frame synchronization being set up in the reception of synchronizing channel and scrambler is synchronous.
WCDMA (Wideband Code Division Multiple Access, the Wideband Code Division Multiple Access (WCDMA) access) initial synchronisation of system then needs to realize by " three step prize laws ", namely, by catching of basic synchronization channel being set up the PN code synchronously and sign synchronization, by the incoherent reception to the different spreading codes of auxiliary synchronization channel, determine scrambler group number etc., at last by possible scrambler being carried out exhaustive search, it is synchronous to set up scrambler.
TD-SCDMA system cell initial ranging process mainly comprises: the SYNC_DL code that the search current area is used, finish DwPTS synchronously (ICS.1); Confirm basic Midamble code and the scrambler (ICS.2) of current area; Finish control multiframe synchronously (ICS.3) according to the phase-modulation sequence of DwPTS; Read the information of BCH (Broadcasting Channel, broadcast channel).
In the TD-SCDMA system, corresponding 4 the BasicMidamble codes of each SYNC_DL code.After having determined the SYNC_DL code of current area, also in 4 Basic Midamble codes, confirm the Basic Midamble code that current area adopts.UE (User Equipment, subscriber equipment) finish DwPTS synchronously after, just can find the Midamble part of TS0 (time slot 0).4 Basic Midamble codes with SYNC_DL code correspondence carry out relevant with the Midamble data of the TS0 that receives respectively, calculate related power, then find out the maximum of related power, its corresponding BasicMidamble code is the Basic Midamble code that current area is used.
Just in question third generation mobile communication long-term evolution system to being used for SCH (the synchronization Channel of Cell searching, synchronizing channel) and BCH (BroadcastingChannel, broadcast channel) implementation method has been done further research, 3G technology standard machine) the technical report TR25.814 " the general land wireless access physical layer part of evolution (Physical layer aspects for evolved Universal Terrestrial RadioAccess) " that provides to present collection to SCH and implementation method and the realization principle of BCH conclude.
Fig. 1 is the SCH 101a and several possible timing relationship of BCH 102a in a radio frames that are used for E-UTRA (evolved UniversalTerrestrial Radio Access) Cell searching that TR25.814 provides.SCH and BCH can send 1 time (shown in Fig. 1 (a), only having 101a and 102a) in each radio frames of 10 milliseconds, perhaps send repeatedly (shown in Fig. 1 (b), both to have sent 101a and 102a, and also sent 101b and 102b).In addition, the SCH that sends in a radio frames and the number of BCH can be different, shown in Fig. 1 (c), except sending 101a and 102a, also send 101b.At this moment, only has a SCH signal 101a.BCH was placed on the concrete time of clearly defined leading or hysteresis SCH in advance, and relative time is τ.The SCH that sends in each radio frames and the number of BCH directly affect carries out RAT (Radio Access Technology under detection probability, Cell searching time, the various motion state, wireless access technology) complexity of measuring between, further, can have influence on the mode of operation of TDD.
For tdd mode, the TDD wireless frame structure that a plurality of SCH of emission or BCH can cause not expecting in a radio frames limits, and can cause the minimizing of up/down row asymmetric combination kind in the TDD wireless frame structure, this impact is more obvious to the wireless frame structure that only has a small amount of up/down row transfer point.For the frame structure of LCR (Low Chip Rate, low spreading rate) TDD, SCH issues by descending special time slot DwPTS, and BCH issues at time slot TS0, and each 5 milliseconds of subframe issues once.
SCH must fix the launch time in all subframes, and the interval of carrying between the subframe of SCH also needs to get steady state value, is convenient to like this correlation that obtains from a plurality of subframes is averaged processing.Constant launch time in order to be implemented in the SCH in the subframe, exist following three kinds of possible SCH symbol multiplexing method: SCH be multiplexed into a wireless sub-frame on a rear OFDM (Orthogonal Frequency Division Multiplex, the OFDM) symbol; SCH is multiplexed on first OFDM symbol of a wireless sub-frame, and forces to use short prefix when Integrated using long and short two kind Cyclic Prefix; Multiplexing all OFDM symbols in the frame of SCH are forced to use short Cyclic Prefix.
Therefore, can find out by technical scheme described above, the Cell searching technology of being correlated with at present, no matter be the Cell searching of TDD system or the Cell searching of FDD system, all be only in its basic spectral range, to issue basic synchronization information and broadcast message, that is: the TDD system uses the frequency spectrum of its two-way operation with basic synchronizing signal and the cell broadcast information of mode sending system in descending time slot of time-division, and the FDD system uses basic synchronizing signal and the cell broadcast information of the downstream spectrum sending system in its paired frequency spectrum; In addition, the TDD system is subjected to the restriction of the up/down row conversion flexibility of cycle of wireless frame structure and frame structure, the number of the SCH that the TDD system can issue in a radio frames obviously is less than the FDD system, therefore, this method that issues basic synchronizing signal and cell broadcast information cause the TDD system Cell searching on the time Cell searching time than FDD system long, that is to say that the time overhead of TDD system cell search is larger.
Summary of the invention
There is the problem of larger time overhead in the Cell searching of mainly considering above-mentioned TDD system and makes the present invention, and for this reason, main purpose of the present invention is to provide a kind of mechanism that can improve TDD Cell searching speed.
For this reason, according to embodiments of the invention, provide the synchronous channel configuration method in a kind of tdd systems.In the method, in the basic frequency spectrum configuration of tdd systems basic synchronizing channel and broadcast channel, at auxiliary synchronizing channel and the broadcast channel of auxiliary frequency spectrum configuration, wherein, auxiliary frequency spectrum is the frequency spectrum for downlink.
Wherein, the coded system of auxiliary synchronization channel and basic synchronization channel is identical or different; The coded system of sub-broadcast channel and basic broadcast channel is identical or different; The broadcast message that sub-broadcast channel and basic broadcast channel carry can be identical or different.
In addition, in a wireless frame period, number and the transmitting time of auxiliary synchronization channel and sub-broadcast channel are also fixed.
In addition, auxiliary synchronization channel and sub-broadcast channel are carried with identical frequency or a different set of frequency in different residential quarters.
In addition, division duplex system in the method comprises: at least one base station, it is except using according to time division way two-way frequency spectrum receives and dispatches, also set up auxiliary synchronization channel and/or sub-broadcast channel at another unidirectional frequency spectrum, to realize the downlink of auxiliary synchronous signal and/or sub-broadcast signal; And at least one terminal, being connected to described at least one base station, described terminal also receives auxiliary synchronous signal and/or sub-broadcast signal at another unidirectional frequency spectrum except use two-way frequency spectrum to realize the transmitting-receiving according to time division way.
According to another embodiment of the present invention, a kind of small region search method is provided, it can use above-mentioned synchronous channel configuration method.
May further comprise the steps in the method: first step, carry out continuously greater than the Pseudo-Random Noise Code synchronizing signal of a time division duplex wireless frame duration or the search of symbol sync signal on basic frequency spectrum; Second step, obtaining Pseudo-Random Noise Code synchronously or after the sign synchronization, according to Pseudo-Random Noise Code synchronously or time mark and the preset time delay of sign synchronization, carry out signal sampling and finish frame synchronization information and extract at auxiliary frequency spectrum, with the relevant treatment of realization Cell searching; Third step is analyzed the auxiliary frequency spectrum data that collects in second step, obtain cell broadcast information.
Wherein, in above-mentioned second step, preset time delay is the time delay between sub-broadcast channel and the basic broadcast channel, in addition, is carrying out signal sampling on the auxiliary frequency spectrum in the timeslice that auxiliary synchronization channel or sub-broadcast channel may occur.In addition, in second step, after basic frequency spectrum was finished signal sampling to basic synchronization channel and/or basic broadcast channel, assist the signal sampling of frequency spectrum, and relevant treatment comprises: code character was searched for, scrambler is synchronous.
In third step, the data of the basic frequency spectrum that sampling is obtained and the data of auxiliary frequency spectrum are carried out analysis-by-synthesis.
In addition, after above-mentioned second step, further may further comprise the steps: steps A, judge on auxiliary frequency spectrum whether have auxiliary synchronization channel or sub-broadcast channel according to the signal sampling result in the second step; Wherein, exist in judgement in the situation of auxiliary synchronization channel or sub-broadcast channel, proceed to third step, otherwise, then proceed to the 4th following step, the 4th step, terminal is finished Cell searching at basic frequency spectrum.
According to another embodiment of the present invention, provide a kind of cell accessing method, used above-mentioned synchronous channel configuration method.
The method comprises: first step, and terminal is finished the initial synchronisation of residential quarter and the reception of Cell Broadcast CB signal from unidirectional frequency spectrum; Second step, the information of the two-way frequency spectrum that obtains according to the broadcast channel from unidirectional frequency spectrum is finished the access to two-way frequency spectrum.
Therefore, the present invention is by launching SCH signal and/or BCH signal by the downstream spectrum outside the basic frequency spectrum of TDD, break the cycle of wireless frame structure and the up/down conversion row flexibility of frame structure the TDD system has been issued the restriction of SCH and BCH number, thereby significantly reduced the time overhead of TDD system on Cell searching.
Description of drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 (a) is the schematic diagram that illustrates according to the sending method of the synchronizing channel in the TDD system of correlation technique and broadcast channel to Fig. 1 (c);
Fig. 2 (a) is the schematic diagram that the example of being combined with descending unidirectional frequency spectrum according to two-way frequency spectrum in the TDD system of the embodiment of the invention is shown to Fig. 2 (b);
Fig. 3 (a) is the schematic diagram that illustrates according to the configuration of synchronizing channel and broadcast channel in the TDD system of the embodiment of the invention to Fig. 3 (c);
Fig. 4 is the flow chart that illustrates according to the small region search method of the embodiment of the invention; And
Fig. 5 is the detailed process chart that illustrates according to the small region search method of the embodiment of the invention; And
Fig. 6 is the flow chart that illustrates according to the cell accessing method of the embodiment of the invention.
Embodiment
(3rd Generation Partnership Project: the 8.2nd joint of the technical report 25.913 that third generation partner program) provides " demand of the wireless universal access (UTRA-Universal Telecommunication Radio Access) of evolution and the wireless universal Access Network of evolution: Requirements for Evolved UTRA (E-UTRA) andEvolved UTRAN (E-UTRAN) (Release 7) " has been determined following principle to the flexibility that frequency spectrum uses: system should be supported in the content that provides identical or different on one group of resource collection and send the 3G technology standard 3GPP of mechanism, this group resource collection comprises: be in RBR (the Radio Band Resources on identical and the different frequency range, wireless bandwidth resource), power, adaptive schedulings etc. also comprise up, the arrangement of the adjacent and non-adjacent channel of down link.System depends on terminal and network complexity and cost to the degree of support of one group of resource collection of Integrated using, and RBR refers to obtainable all frequency spectrums of operator.
Below, will and embodiments of the invention be described by reference to the accompanying drawings based on mentioned above principle.
The method described in the embodiment of the invention that it is pointed out that all is applicable to comprise the TDD system of at least one base station and at least one terminal.In this TDD system, the base station is except using one section two-way frequency spectrum to realize the transmitting-receiving according to time division way, can also set up auxiliary synchronization channel and/or sub-broadcast channel at other one section unidirectional frequency spectrum, to realize sending auxiliary synchronous signal and/or sub-broadcast signal; And terminal is except using one section two-way frequency spectrum to realize the transmitting-receiving according to time division way, can also receive auxiliary synchronous signal and/or sub-broadcast signal at other one section unidirectional frequency spectrum, wherein, terminal is to carry out in the mode of time-division in the transmitting-receiving on one section two-way frequency spectrum and the reception on another unidirectional frequency spectrum.In addition, the reception of terminal on unidirectional frequency spectrum comprises to the reception of synchronous channel signal or to the reception of broadcast channel signal.
The first embodiment
In this embodiment, provide synchronous channel configuration method in a kind of tdd systems.In the method, in the basic frequency spectrum configuration of tdd systems basic synchronizing channel and broadcast channel, at auxiliary synchronizing channel (SCH) and the broadcast channel (BCH) of auxiliary frequency spectrum configuration, wherein, auxiliary frequency spectrum is the frequency spectrum for downlink.
It should be noted that different residential quarters carries auxiliary synchronization channel and sub-broadcast channel with identical frequency or a different set of frequency.
In addition, the coded system of auxiliary synchronization channel and basic synchronization channel is identical or different; The coded system of sub-broadcast channel and basic broadcast channel is identical or different; The broadcast message that sub-broadcast channel and basic broadcast channel carry can be identical or different.In addition, in a wireless frame period, number and the transmitting time of auxiliary synchronization channel and sub-broadcast channel are also fixed.
At first, the spectrum structure that a kind of TDD strengthens system has been shown among Fig. 2 (a), wherein, using outside the non-paired two-way frequency spectrum 202, has increased the frequency spectrum 201 that is specifically designed to downlink newly, the frequency spectrum 201 of downlink is that license is to the frequency spectrum of TDD system.Fig. 2 (b) has provided the 3G frequency range of Chinese division, wherein TDD frequency spectrum 203,204,206,207 parts as two-way frequency spectrum 202.A kind of method of choosing downlink frequency spectrum 201 is: the frequency spectrum 201 of part or all frequency spectrum 201a in the TDD frequency spectrum 206 of the downstream spectrum (FDD-DL) 205 of next-door neighbour's Frequency Division Duplexing (FDD) frequency spectrum as downlink, frequency spectrum 201a both had been used for the emission of broadcasting service, also was used to TDD frequency spectrum 203,204,207 up emission that feedback path is provided.The method that another kind is chosen downlink frequency spectrum 201 is: close on a part of frequency spectrum 201b of satellite band as the frequency spectrum 201 of downlink in 207.
Based on foregoing and describe each details of the method in the present embodiment in conjunction with example.Wherein, Fig. 3 (a) illustrates the schematic diagram that comes configuration synchronization channel and broadcast channel according to the embodiment of the invention to Fig. 3 (c).
Example 1
Network side disposes SCH and BCH according to Fig. 2 (b) at the basic frequency spectrum 202 of TDD and auxiliary frequency spectrum (also can be called spread-spectrum) 201.That is, on auxiliary frequency spectrum 201, the frequency spectrum f2 that represents among the use figure sends some auxiliary SCH_A 301a/b and BCH_A302a a/b.
Auxiliary SCH_A 301a/b can have identical coded system with basic SCH 101a, also can adopt and the basic different coded system of SCH 201a; Auxiliary BCH_A302a a/b can have identical coded system with basic BCH 102a, also can adopt and the basic different coded system of BCH 102a.Auxiliary BCH_A 302a/b can carry identical broadcast message with basic BCH 102a, also can carry and the basic different broadcast message of BCH 102a.
In addition, in a wireless frame period, with respect to the radio frames of TDD system, number and the transmitting time of auxiliary BCH_A 302a and auxiliary SCH_A 301a are fixed, and the μ in relative time delay between auxiliary BCH_A 302a and the auxiliary SCH_A 301a also fixes.
In a mobile communication system, auxiliary BCH_A 302a and auxiliary SCH_A 301a can be carried with identical frequency in different residential quarters, also can be that auxiliary BCH_A 302a and auxiliary SCH_A 301a are carried with a different set of frequency in different residential quarters.
Example 2
Network side on auxiliary frequency spectrum (also can be called spread-spectrum) 201, namely uses the frequency spectrum f2 that represents among the figure according to Fig. 2 (c), only sends some auxiliary SCH_A 301a/b.
In a wireless frame period, with respect to the radio frames of TDD system, number and the transmitting time of auxiliary BCH_A302a are fixed.In addition, in mobile communication system, auxiliary SCH_A 301a can be carried with identical frequency in different residential quarters, also can carry auxiliary SCH_A 301a with a different set of frequency.
The second embodiment
In this embodiment, provide a kind of small region search method, it can use above-mentioned synchronous channel configuration method.
As shown in Figure 4, the method may further comprise the steps: step S402, carry out continuously greater than the Pseudo-Random Noise Code synchronizing signal of a time division duplex wireless frame duration or the search of symbol sync signal on basic frequency spectrum; Step S404, obtaining Pseudo-Random Noise Code (PN code) synchronously or after the sign synchronization, according to Pseudo-Random Noise Code synchronously or time mark and the preset time delay of sign synchronization, carry out signal sampling and finish the frame synchronization information extraction at auxiliary frequency spectrum, with the relevant treatment that realizes Cell searching (for example, code character search, scrambler synchronous etc.); Step S406 analyzes the auxiliary frequency spectrum data that collects in step S404, obtain cell broadcast information.
In order to reach better effect, can carry out integrated treatment to the signal of the auxiliary SCH_A 301a that in step S402, collects and basic SCH 101a, for example, the signal of auxiliary SCH_A 301a and basic SCH 101a is carried out grand diversity merging.
Wherein, in above-mentioned step S404, preset time delay is the time delay between sub-broadcast channel and the basic broadcast channel, for example, can be that SCH_A 301a is with respect to the time delay δ between the basic BCH 102a, in addition, in the timeslice that auxiliary synchronization channel or sub-broadcast channel may occur, carrying out signal sampling on the auxiliary frequency spectrum.In addition, in step S404, after basic frequency spectrum is finished signal sampling to basic synchronization channel (for example, SCH 101a) and/or basic broadcast channel (for example, BCH 102a), the signal sampling of assisting frequency spectrum (201).
In step S406, can further obtain cell broadcast information by the data of demodulation broadcast channel.In order to reach better effect, can carry out analysis-by-synthesis to sampled data and auxiliary BCH_A 302a (and 302b) sampled data from basic BCH 102a that sampling obtains.If the auxiliary SCH_A 301a that step S404 collects and/or auxiliary BCH_A 302a data are abundant not, then proceed sampling and make further frame synchronization information and extract to the signal of basic SCH 101a, auxiliary SCH_A 301a and/or to auxiliary BCH_A 302a in next radio frames the inside, to finish the processing such as code character search, scrambler that Cell searching needs be synchronous.
Preferably, said method further comprises following processing details, as shown in Figure 5.
At step S504 (identical with the processing of above-mentioned steps S404) afterwards, judge on auxiliary frequency spectrum 201, whether have auxiliary synchronization channel SCH_A 301a or sub-broadcast channel BCH_A 302a according to the signal sampling result among the step S504; Wherein, exist in judgement in the situation of auxiliary synchronization channel or sub-broadcast channel, proceed to step S506 (identical with the processing of above-mentioned steps S406), otherwise then proceed to following step S508: terminal is finished Cell searching (comprising the processing such as the PN code is synchronous, code character is searched for, scrambler is synchronous) at basic frequency spectrum.
Wherein, above-mentioned determination methods is specifically: judge whether to exist auxiliary synchronization channel SCH_A 301a or sub-broadcast channel BCH_A 302a by using predetermined one or one group of Pseudo-Random Noise Code (PN) that the sampled data on the auxiliary frequency spectrum 201 is carried out related operation, wherein, if the correlation peak output greater than predetermined threshold is arranged, then judge to have auxiliary synchronization channel or sub-broadcast channel.
In addition, when the terminal of the basic frequency spectrum of Integrated using TDD and unidirectional downstream spectrum accesses the network of a basic frequency spectrum of Integrated using TDD and unidirectional downstream spectrum, if the unidirectional downstream spectrum of carrying synchronizing channel (SCH) and broadcast channel (BCH) is certain frequency in known or a group, then can be as the FDD system, directly allow this terminal finish access to two-way frequency spectrum from unidirectional frequency spectrum, can make like this this terminal reach the access speed identical with the FDD system.In this case, in above-mentioned steps S402, can be on auxiliary frequency spectrum 201 certain frequency in known or a group be carried out the search of initial synchronisation signal.
As shown in Figure 6, this cut-in method may further comprise the steps: step S602, and terminal is finished the initial synchronisation of residential quarter and the reception of Cell Broadcast CB signal from unidirectional frequency spectrum; And step S604, the information of the two-way frequency spectrum that obtains according to the broadcast channel from unidirectional frequency spectrum is finished the access to two-way frequency spectrum.
The method that provides by means of each embodiment described above and the example, the present invention launches SCH signal and/or BCH signal by the downstream spectrum outside the basic frequency spectrum of TDD, break the up/down conversion row flexibility of cycle of wireless frame structure of TDD system and frame structure to issuing the restriction of SCH and BCH number, significantly reduced the time overhead of TDD system on Cell searching.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1. the synchronous channel configuration method in the tdd systems, it is characterized in that, in the basic frequency spectrum configuration of described tdd systems basic synchronizing channel and/or broadcast channel, at auxiliary synchronizing channel and/or the broadcast channel of auxiliary frequency spectrum configuration, wherein, the basic frequency spectrum of described tdd systems is two-way frequency spectrum, and described auxiliary frequency spectrum is the unidirectional frequency spectrum for downlink.
2. method according to claim 1 is characterized in that, when having described basic synchronizing channel and described auxiliary synchronizing channel, the coded system of described auxiliary synchronizing channel and described basic synchronizing channel is identical or different; When having described basic broadcast channel and described auxiliary broadcast channel, the coded system of described auxiliary broadcast channel and described basic broadcast channel is identical or different; When having described basic broadcast channel and described auxiliary broadcast channel, the broadcast message that described auxiliary broadcast channel and described basic broadcast channel carry can be identical or different.
3. method according to claim 1, it is characterized in that, when having described auxiliary synchronizing channel and described auxiliary broadcast channel, in a wireless frame period, number and the transmitting time of described auxiliary synchronizing channel and described auxiliary broadcast channel are fixed.
4. method according to claim 1, it is characterized in that, when having described auxiliary synchronizing channel and described auxiliary broadcast channel, described auxiliary synchronizing channel and described auxiliary broadcast channel are carried with identical frequency or a different set of frequency in different residential quarters.
5. method according to claim 1 is characterized in that, described tdd systems comprises:
At least one base station, it also sets up auxiliary synchronization channel and/or sub-broadcast channel at another unidirectional frequency spectrum, to realize the downlink of auxiliary synchronous signal and/or sub-broadcast signal except using according to time division way two-way frequency spectrum receives and dispatches; And
At least one terminal is connected to described at least one base station, and described terminal also receives auxiliary synchronous signal and/or sub-broadcast signal at another unidirectional frequency spectrum except use two-way frequency spectrum to realize the transmitting-receiving according to time division way.
6. a small region search method is characterized in that, uses according to claim 1 each described synchronous channel configuration method in 5, it is characterized in that, may further comprise the steps:
First step carries out continuously greater than the Pseudo-Random Noise Code synchronizing signal of a time division duplex wireless frame duration or the search of symbol sync signal on basic frequency spectrum;
Second step, obtaining Pseudo-Random Noise Code synchronously or after the sign synchronization, according to described Pseudo-Random Noise Code synchronously or time mark and the preset time delay of sign synchronization, carry out signal sampling and finish the frame synchronization information extraction at auxiliary frequency spectrum, to realize the relevant treatment of Cell searching, wherein, the relevant treatment of Cell searching comprises that at least code character is searched for and scrambler is synchronous;
Third step, the data that the auxiliary frequency spectrum that analysis collects in described second step carries obtain cell broadcast information.
7. method according to claim 6 is characterized in that, in described second step, described preset time delay is the time delay between the broadcast channel of assisting and the basic broadcast channel.
8. method according to claim 6 is characterized in that, in described second step, is carrying out signal sampling on the auxiliary frequency spectrum in the timeslice that auxiliary synchronizing channel or auxiliary broadcast channel may occur.
9. method according to claim 6 is characterized in that, in described second step, after described basic frequency spectrum is finished signal sampling to basic synchronizing channel and/or basic broadcast channel, carries out the signal sampling of described auxiliary frequency spectrum.
10. method according to claim 9 is characterized in that, in described third step, the data of the described basic frequency spectrum that sampling is obtained and the data of described auxiliary frequency spectrum are carried out analysis-by-synthesis.
11. each described method in 10 is characterized in that according to claim 6, after described second step, further may further comprise the steps:
Steps A judges whether there is auxiliary synchronizing channel on described auxiliary frequency spectrum according to the signal sampling result in the described second step, wherein, exist in judgement in the situation of described auxiliary synchronizing channel, proceed to described third step, otherwise, then proceed to the 4th following step; Or, judge on described auxiliary frequency spectrum, whether have auxiliary broadcast channel according to the signal sampling result in the described second step; Wherein, exist in judgement in the situation of described auxiliary broadcast channel, proceed to described third step, otherwise, then proceed to the 4th following step;
The 4th step, terminal is finished Cell searching at described basic frequency spectrum.
12. method according to claim 11, it is characterized in that, in described steps A, judge whether to exist described auxiliary synchronizing channel by with predetermined one or one group of Pseudo-Random Noise Code the sampled data on the described auxiliary frequency spectrum being carried out related operation, wherein, if the correlation peak output greater than predetermined threshold is arranged, then judge to have described auxiliary synchronizing channel; Or, judge whether to exist described auxiliary broadcast channel by with predetermined one or one group of Pseudo-Random Noise Code the sampled data on the described auxiliary frequency spectrum being carried out related operation, wherein, export if having greater than the correlation peak of predetermined threshold, then judge to have described auxiliary broadcast channel.
13. a cell accessing method is characterized in that, uses according to claim 1 each described synchronous channel configuration method in 7, it is characterized in that, may further comprise the steps:
First step, terminal is finished the initial synchronisation of residential quarter and the reception of Cell Broadcast CB signal from unidirectional frequency spectrum;
Second step according to the two-way spectrum information that the broadcast channel from described unidirectional frequency spectrum obtains, is finished the access to two-way frequency spectrum.
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| CN1780174B (en) * | 2004-11-19 | 2011-05-25 | 上海宣普实业有限公司 | The first and second steps series iterative method for area searching in time divided duplexing system |
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| EP1443794A2 (en) * | 2003-01-29 | 2004-08-04 | Samsung Electronics Co., Ltd. | Wireless communication system and method for offering hybrid duplexing technology |
| CN1748377A (en) * | 2003-02-11 | 2006-03-15 | Ip无线有限公司 | Method, base station and mobile station for tdd operation in a communication system |
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