CN103546939A - Multi-channel wireless communication system cell searching method and terminal - Google Patents
Multi-channel wireless communication system cell searching method and terminal Download PDFInfo
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- CN103546939A CN103546939A CN201210243410.XA CN201210243410A CN103546939A CN 103546939 A CN103546939 A CN 103546939A CN 201210243410 A CN201210243410 A CN 201210243410A CN 103546939 A CN103546939 A CN 103546939A
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Abstract
Disclosed is a multi-channel wireless communication system cell searching method. The method includes allowing a terminal to read K priority broadcasts/synchronization sub bands sequentially, and performing cell detection and broadcast reception; when valid cell broadcast exists in the sub bands and RSRP exceeds the threshold, determining the cell search is successful; when the valid cell broadcast exists and no RSRP exceeds the threshold, comparing RSRQ of all valid cell broadcast; when no valid cell broadcast exists in the sub bands of the K priority broadcasts/synchronization sub bands, searching in remaining N-K sub banks in a frequency point memory table, if valid cell broadcast is searched in the remaining sub bands, reporting that cell search is successful; if not, the cell search is failed. The invention further discloses a multi-channel wireless communication system cell searching terminal. By the application of an embodiment of the method, flexibility is high, and cell search delay is short.
Description
Technical field
The application relates to communication technical field, more specifically, relates to method and the terminal of a kind of channel wireless radio multi communication system cell search.
Background technology
Channel wireless radio multi communication system is a kind of communication system based on having used the key technologies such as smart frequency spectrum perception and carrier aggregation under discrete, narrow band spectrum condition.This system configures N working sub-band in special frequency channel, and working sub-band comprises business subband and broadcast/synchronize subband.Working sub-band is distributed in K bunch, and each bunch comprises a broadcast/synchronous subband.For example, system configuration K bunch N working sub-band (N=40, K=3), comprise the subband of N-K business subband and K broadcast/synchronously.Broadcast/synchronous subband has comprised broadcast channel and synchronizing channel, and every frame alternative arrangement.Broadcast channel (PBCH) has carried system broadcast information (MIB), and synchronizing channel has comprised main synchronizing sequence (PSC) and secondary synchronization sequences (SSC).
In channel wireless radio multi communication system, UE terminal will be carried out Cell searching when start or desynchronizing state.First UE, in selected broadcast/synchronous subband frequency reception antenna data, completes community ID according to PSC/SSC sequence and detects, and time and Frequency Synchronization, finally receive PBCH and MIB decoding.
Prior art comprises the mode of following two kinds of Cell searchings.Base station adopts broadcast/synchronous subband fixed configurations, and terminal is according to fixedly subband search; Another kind is that base station adopts broadcast/synchronous subband random arrangement, and terminal is according to the search of traversal subband.
Base station adopts broadcast/synchronous subband fixed configurations and terminal specifically to comprise according to the mode of operation of fixedly subband search: channel wireless radio multi communication system adopts the mode of operation of broadcast/synchronous subband fixed configurations, be base station N-K frequency transmitting business signal in a special frequency channel N frequency, broadcast/synchronous subband arrangement is on the individual fixedly frequency of K of K bunch.During UE terminal Cell searching, in the fixing reception antenna data on frequency of K, complete community ID and detect, time and Frequency Synchronization and PBCH receive.In actual applications, if there is certain broadcast/synchronous subband frequency can there is the situations such as change in disabled or special frequency channel with subband frequency, and base station and UE terminal all cannot adapt to change.
For the shortcoming of broadcast/synchronous subband fixed configurations underaction, channel wireless radio multi communication system can also be selected another kind of mode of operation: random arrangement, system base-station is selected arbitrarily K working sub-band frequency random arrangement broadcast/synchronous subband.The each Cell searching of UE terminal all travels through all possible working sub-band of this frequency range, attempts one by one and access the broadcast/synchronous subband of current actual disposition.Although this mode of operation can improve system group network flexibility, shortcoming is that the time delay of UE Cell searching is oversize, cannot carry out fast transfer of data.
To sum up, there is in the prior art Cell searching time delay length or the poor technical problem of networking flexibility.
Summary of the invention
The embodiment of the present invention proposes the method for a kind of channel wireless radio multi communication system cell search, has that flexibility is high and Cell searching time delay is short.
The embodiment of the present invention also proposes the terminal of a kind of channel wireless radio multi communication system cell search, has that flexibility is high and Cell searching time delay is short.
The technical scheme of the embodiment of the present invention is as follows:
A method for channel wireless radio multi communication system cell search, described method comprises:
Terminal reads K preferential broadcast/synchronous subband from frequency storage list successively;
On K preferential broadcast/synchronous subband, there is effective Cell Broadcast CB, and directly determine Cell searching success, reported result according to the Reference Signal Received Power RSRP of efficient cell;
On K preferential broadcast/synchronous subband, there is effective Cell Broadcast CB, and cannot directly determine Cell searching success according to the RSRP of efficient cell, again search on the subband of being determined by Reference Signal Received Quality RSRQ in efficient cell, again searches the rear reporting subdistrict of efficient cell broadcast and searches for successfully; Otherwise again read frequency storage list from section start;
On K preferential broadcast/synchronous subband, do not have effective Cell Broadcast CB, travel through the remaining N-K of a frequency storage list subband, N is working sub-band number, as long as there is a subband to search efficient cell broadcast on described residue subband, reporting subdistrict is searched for successfully; Otherwise reporting subdistrict is searched for unsuccessfully.
The effective Cell Broadcast CB of described existence comprises: system broadcast information MIB decoding is correct, determines and has effective Cell Broadcast CB.
Describedly according to the RSRP of efficient cell, directly determine that Cell searching successfully comprises: the RSRP of efficient cell is greater than default threshold value, determines Cell searching success.
Described search again comprises: in efficient cell, select search again on preferential broadcast corresponding to RSRQ maximum/synchronous subband.
Describedly again search efficient cell broadcast and comprise: on the subband of search again, search the MIB decoding that Cell Broadcast CB is corresponding correct, determine and again search efficient cell broadcast.
Described method further comprises: the broadcast/synchronous subband that records and store present access subzone.
A terminal for channel wireless radio multi communication system cell search, described terminal comprises search module, control module, judge module and communication module;
Search module, for reading successively K preferential broadcast/synchronous subband, on the definite subband of Reference Signal Received Quality RSRQ, search again, travels through a remaining N-K subband, and N is working sub-band number;
Control module, for determining whether there is effective Cell Broadcast CB on subband;
Judge module, whether successful for determine Cell searching according to the Reference Signal Received Power RSRP of efficient cell, whether judgement again search is successful;
Communication module, searches for successfully failed with Cell searching for reporting subdistrict.
Described control module is further used for, and according to system broadcast information MIB decoding, correctly determines and has effective Cell Broadcast CB.
Described judge module is further used for, and is greater than default threshold value determines Cell searching success according to the RSRP of efficient cell.
Described search module is further used for, search again on preferential broadcast corresponding to RSRQ maximum in efficient cell/synchronous subband.
Described judge module is further used for, and at the subband of search cell again, searches the MIB decoding that Cell Broadcast CB is corresponding correct, determines and again searches efficient cell broadcast.
Described communication module is further used for, and records and store the broadcast/synchronous subband of present access subzone.
From technique scheme, can find out, terminal reads K preferential broadcast/synchronous subband from frequency storage list successively in embodiments of the present invention, first on K preferential broadcast/synchronous subband, judge whether to exist effective Cell Broadcast CB, and then travel through a remaining N-K subband.As long as the Cell Broadcast CB and the RSRP that have a subband to have effect surpass thresholding, directly determine Cell searching success reported result on K preferential broadcast/synchronous subband; If in all effective Cell Broadcast CBs, neither one RSRP surpasses thresholding on K preferential broadcast/synchronous subband, select preferential broadcast corresponding to RSRQ maximum/synchronous subband again to search for, again search the i.e. success of effective Cell Broadcast CB, otherwise again read frequency storage list from section start; There is effective Cell Broadcast CB in neither one subband on K preferential broadcast/synchronous subband, travels through one by one the remaining N-K of a storage list subband, as long as exist a subband to search effective Cell Broadcast CB on described residue subband, reporting subdistrict is searched for successfully; Otherwise reporting subdistrict is searched for unsuccessfully.No matter on K preferential broadcast/synchronous subband, whether there is effective Cell Broadcast CB, can judge further respectively in conjunction with concrete situation, compared with prior art, the flexibility of this technical scheme integral body is stronger, and has effectively shortened the time delay of Cell searching.
Accompanying drawing explanation
Fig. 1 is the method flow schematic diagram of channel wireless radio multi communication system cell search;
Fig. 2 is the terminal structure schematic diagram of channel wireless radio multi communication system cell search.
Embodiment
For making the object, technical solutions and advantages of the present invention express clearlyer, below in conjunction with drawings and the specific embodiments, the present invention is further described in more detail.
In embodiments of the present invention, when terminal is carried out whole subband Cell searching, preferentially select K default preferential broadcast/synchronous subband, most applications can detect efficient cell broadcast quickly; When searching efficient cell and RSRP and surpass thresholding, directly reporting subdistrict search for successfully, without all carrying out the subband search procedures of individual default preferential broadcast of K/synchronously; When neither one subband RSRP surpasses thresholding in all efficient cells on preferential broadcast/synchronous subband, can also in all efficient cells, select search again on subband corresponding to RSRQ maximum.For broadcast/synchronous subband system on K default subband not, UE cannot search efficient cell broadcast on default broadcast/synchronous subband, will travel through successively other residue subbands until search efficient cell broadcast, and reporting subdistrict is searched for successfully.Because technical scheme of the present invention is divided three kinds of situations processing search efficient cell broadcast, therefore whole flexibility is stronger, has effectively shortened the time delay of Cell searching with respect to prior art.
Below in conjunction with accompanying drawing 1, describe technical scheme of the present invention in detail.
Channel wireless radio multi communication system adopts semi-static broadcast/synchronous subband arrangement.The K of base station broadcast/synchronous subband arrangement, at default subband frequency, is called K preferential broadcast/synchronous subband under normal circumstances.Only, under specific industry application or special networking condition, broadcast/synchronous subband is configured in other available subbands according to actual environment.
On step 102, preferentially broadcast at K/synchronous subband, judge whether to exist effective Cell Broadcast CB.
The deterministic process of efficient cell broadcast comprises: community ID detection, time and Frequency Synchronization and MIB decoding, above-mentioned three steps are carried out successively, determine correctly just enforcement after the first two step correctly completes of MIB decoding.Therefore can be whether correct according to MIB decoding, judge whether above-mentioned three processes all correctly complete.If MIB decoding is correct, determines on this subband and have effective Cell Broadcast CB; Otherwise MIB decoding error is determined on this subband does not have efficient cell to broadcast.If there is effective Cell Broadcast CB on K preferential broadcast/synchronous subband, perform step 103; If there is no efficient cell broadcast on K preferential broadcast/synchronous subband, perform step 105.
According to RSRP, determine that whether Cell searching is successful.Terminal is calculated RSRP, if the RSRP calculating is greater than default threshold value, shows that this subband signal is good especially, Cell searching success, and directly reporting subdistrict is searched for successfully; If the RSRP calculating is less than or equal to default threshold value, illustrate at K preferential broadcast/synchronous subband and do not have the particularly preferred subband of signal, must carry out group and search comparison procedure, perform step 104.
Subband corresponding to RSRQ maximum in step 104, selection efficient cell, search again on this subband.
If successfully do not search the particularly preferred subband of signal at K preferential broadcast/synchronous subband, need to carry out group and search comparison, select subband corresponding to RSRQ maximum in efficient cell again to search for.Again after search, if correct in subband MIB decoding corresponding to RSRQ maximum, determine and again search for successfully, and reporting subdistrict searched for successfully; If at subband MIB decoding error corresponding to RSRQ maximum, restart whole Cell searching flow process, all state zero clearings, read frequency storage list again from section start, return to step 101.
If there is not effective Cell Broadcast CB on K preferential broadcast/synchronous subband, travel through a remaining N-K subband, N is working sub-band number.
In step 106, judgement residue subband, on subband, there is effective Cell Broadcast CB.
If the MIB decoding that in residue subband, subband is corresponding is correct, determines in residue subband and have effective Cell Broadcast CB on subband; Otherwise, in residue subband, on subband, there is not effective Cell Broadcast CB, reporting subdistrict is searched for unsuccessfully.
In addition, if Cell searching success, UE will preserve current broadcast/synchronous subband, replaces preferential broadcast original in allocation list/synchronous subband.When UE is next time during starting up's Cell searching, can select rapidly the broadcast/synchronous subband of this community actual disposition.
Referring to accompanying drawing 2, are terminal structure schematic diagrames of channel wireless radio multi communication system cell search, the terminal of channel wireless radio multi communication system cell search comprises: search module 201, control module 202, judge module 203 and communication module 204.
The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (12)
1. a method for channel wireless radio multi communication system cell search, is characterized in that, described method comprises:
Terminal reads K preferential broadcast/synchronous subband from frequency storage list successively;
On K preferential broadcast/synchronous subband, there is effective Cell Broadcast CB, and directly determine Cell searching success, reported result according to the Reference Signal Received Power RSRP of efficient cell;
On K preferential broadcast/synchronous subband, there is effective Cell Broadcast CB, and cannot directly determine Cell searching success according to the RSRP of efficient cell, again search on the subband of being determined by Reference Signal Received Quality RSRQ in efficient cell, again searches the rear reporting subdistrict of efficient cell broadcast and searches for successfully; Otherwise again read frequency storage list from section start;
On K preferential broadcast/synchronous subband, do not have effective Cell Broadcast CB, travel through the remaining N-K of a frequency storage list subband, N is working sub-band number, as long as there is a subband to search efficient cell broadcast on described residue subband, reporting subdistrict is searched for successfully; Otherwise reporting subdistrict is searched for unsuccessfully.
2. the method that channel wireless radio multi communication system cell is searched for according to claim 1, is characterized in that, the effective Cell Broadcast CB of described existence comprises: system broadcast information MIB decoding is correct, determines and has effective Cell Broadcast CB.
3. the method that channel wireless radio multi communication system cell is searched for according to claim 1, it is characterized in that, describedly according to the RSRP of efficient cell, directly determine that Cell searching successfully comprises: the RSRP of efficient cell is greater than default threshold value, determines Cell searching success.
4. the method that channel wireless radio multi communication system cell is searched for according to claim 1, is characterized in that, described search again comprises: in efficient cell, select search again on preferential broadcast corresponding to RSRQ maximum/synchronous subband.
5. the method that channel wireless radio multi communication system cell is searched for according to claim 1, it is characterized in that, describedly again search efficient cell broadcast and comprise: on the subband of search again, search the MIB decoding that Cell Broadcast CB is corresponding correct, determine and again search efficient cell broadcast.
6. the method that channel wireless radio multi communication system cell is searched for according to claim 1, is characterized in that, described method further comprises: the broadcast/synchronous subband that records and store present access subzone.
7. a terminal for channel wireless radio multi communication system cell search, is characterized in that, described terminal comprises search module, control module, judge module and communication module;
Search module, for reading successively K preferential broadcast/synchronous subband, on the definite subband of Reference Signal Received Quality RSRQ, search again, travels through a remaining N-K subband, and N is working sub-band number;
Control module, for determining whether there is effective Cell Broadcast CB on subband;
Judge module, whether successful for determine Cell searching according to the Reference Signal Received Power RSRP of efficient cell, whether judgement again search is successful;
Communication module, searches for successfully failed with Cell searching for reporting subdistrict.
8. the terminal that channel wireless radio multi communication system cell is searched for according to claim 7, is characterized in that, described control module is further used for, and according to system broadcast information MIB decoding, correctly determines and has effective Cell Broadcast CB.
9. the terminal that channel wireless radio multi communication system cell is searched for according to claim 7, is characterized in that, described judge module is further used for, and is greater than default threshold value determines Cell searching success according to the RSRP of efficient cell.
10. the terminal of channel wireless radio multi communication system cell search according to claim 7, is characterized in that, described search module is further used for, search again on preferential broadcast/synchronous subband corresponding to RSRQ maximum in efficient cell.
11. terminals that channel wireless radio multi communication system cell is searched for according to claim 7, it is characterized in that, described judge module is further used for, at the subband of search cell again, search the MIB decoding that Cell Broadcast CB is corresponding correct, determine and again search efficient cell broadcast.
12. terminals that channel wireless radio multi communication system cell is searched for according to claim 7, is characterized in that, described communication module is further used for, and record and store the broadcast/synchronous subband of present access subzone.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106658663A (en) * | 2015-10-28 | 2017-05-10 | 普天信息技术有限公司 | Cell search optimization method of wireless communication system |
| CN110312321A (en) * | 2019-05-10 | 2019-10-08 | 展讯通信（上海）有限公司 | Random access is resident frequency point and determines method, apparatus and terminal |
| CN110764713A (en) * | 2019-10-31 | 2020-02-07 | 上海移远通信技术股份有限公司 | Writing method and system of flash memory, electronic device, medium and communication module |
| CN111464257A (en) * | 2019-01-21 | 2020-07-28 | 普天信息技术有限公司 | Cell search processing method and device |
| WO2022188416A1 (en) * | 2021-03-09 | 2022-09-15 | 深圳市广和通无线股份有限公司 | Network registration method and terminal device |
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| US20050265286A1 (en) * | 2004-05-31 | 2005-12-01 | Canon Kabushiki Kaisha | Communication system for connecting a communication apparatus to a specific connecting apparatus |
| CN1798401A (en) * | 2004-12-27 | 2006-07-05 | 株式会社日立制作所 | Mobile wireless terminal apparatus and wireless communication system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106658663A (en) * | 2015-10-28 | 2017-05-10 | 普天信息技术有限公司 | Cell search optimization method of wireless communication system |
| CN106658663B (en) * | 2015-10-28 | 2019-11-22 | 普天信息技术有限公司 | A kind of the cell searching optimization method and equipment of wireless communication system |
| CN111464257A (en) * | 2019-01-21 | 2020-07-28 | 普天信息技术有限公司 | Cell search processing method and device |
| CN110312321A (en) * | 2019-05-10 | 2019-10-08 | 展讯通信（上海）有限公司 | Random access is resident frequency point and determines method, apparatus and terminal |
| CN110764713A (en) * | 2019-10-31 | 2020-02-07 | 上海移远通信技术股份有限公司 | Writing method and system of flash memory, electronic device, medium and communication module |
| CN110764713B (en) * | 2019-10-31 | 2023-11-07 | 上海移远通信技术股份有限公司 | Writing method and system of flash memory, electronic equipment, medium and communication module |
| WO2022188416A1 (en) * | 2021-03-09 | 2022-09-15 | 深圳市广和通无线股份有限公司 | Network registration method and terminal device |
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