CN103546939B - The method of a kind of channel wireless radio multi communication system cell search and terminal - Google Patents
The method of a kind of channel wireless radio multi communication system cell search and terminal Download PDFInfo
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- CN103546939B CN103546939B CN201210243410.XA CN201210243410A CN103546939B CN 103546939 B CN103546939 B CN 103546939B CN 201210243410 A CN201210243410 A CN 201210243410A CN 103546939 B CN103546939 B CN 103546939B
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- cell
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The method of a kind of channel wireless radio multi communication system cell search, described method includes: terminal is successively read K preferential broadcast/synchronization subband, carries out cell detection and broadcast reception；When subband there are the Cell Broadcast CB of effect and RSRP exceedes thresholding, it is determined that cell searching success；If wherein effective Cell Broadcast CB not having RSRP to exceed thresholding, the RSRQ of the most all effective Cell Broadcast CBs, select the corresponding preferential broadcast of RSRQ maximum/synchronize subband to re-search for, search effective Cell Broadcast CB i.e. success；When not having the effective Cell Broadcast CB of subband on K preferential broadcast/synchronization subband, then traversal frequency storage table K subband of remaining N, described residue subband has subband to search effective Cell Broadcast CB, then reporting subdistrict is searched for successfully；Otherwise failure.Invention additionally discloses the terminal of a kind of channel wireless radio multi communication system cell search.After the application embodiment of the present invention, there is motility height and cell searching time delay is short.
Description
Technical field
The application relates to communication technical field, more particularly, to the search of a kind of channel wireless radio multi communication system cell
Method and terminal.
Background technology
Channel wireless radio multi communication system is a kind of to have used smart frequency spectrum perception and load based under the conditions of discrete, narrow band spectrum
The communication system of the key technologies such as ripple polymerization.This system configures N number of working sub-band, working sub-band bag in special frequency channel
Containing business subband and broadcast/Tong Bu subband.Working sub-band is distributed in K bunch, and each bunch comprises a broadcast/same to step
Band.Such as, system is configured with K bunch N number of working sub-band (N=40, K=3), including N-K business
Band and K broadcast/synchronization subband.Broadcast/synchronization subband contains broadcast channel and synchronizing channel, and replaces every frame
Arrangement.Broadcast channel (PBCH) carries system broadcast information (MIB), and synchronizing channel contains main synchronizing sequence
And secondary synchronization sequences (SSC) (PSC).
In channel wireless radio multi communication system, UE terminal will perform cell searching when being in start or desynchronizing state.First
UE, in selected broadcast/synchronization subband frequency reception antenna data, completes community ID detection according to PSC/SSC sequence,
Time and Frequency Synchronization, finally receive PBCH and MIB decoding.
Prior art includes the mode of following two cell searching.One is that base station uses broadcast/synchronization subband to fix and join
Putting, terminal is searched for according to fixing subband；Another kind be base station use broadcast/synchronize subband random arrangement, terminal according to time
Go through subband search.
The mode of operation that base station uses broadcast/synchronization subband fixed configurations and terminal to search for according to fixing subband is specifically wrapped
Include: channel wireless radio multi communication system uses the mode of operation of broadcast/synchronization subband fixed configurations, and i.e. base station is in special frequency channel
N-K frequency transmitting business signal in N number of frequency, broadcast/synchronize K the fixing frequency that subband arrangement is at K bunch
On.During UE terminal cell search on K fixing frequency reception antenna data, complete community ID detection, the time and
Frequency Synchronization and PBCH receive.In actual applications, if there is certain broadcast/synchronize subband frequency disabled or
Person's special frequency channel all can cannot adapt to change by situation, base station and UE terminals such as subband frequency generation changes.
For the shortcoming of broadcast/synchronization subband fixed configurations underaction, channel wireless radio multi communication system can also select separately
A kind of mode of operation: random arrangement, i.e. system base-station arbitrarily select K working sub-band frequency random arrangement broadcast/synchronization
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 accesses and works as
The broadcast of front actual disposition/synchronization subband.Although this mode of operation can improve system group network motility, shortcoming is
The time delay of UE cell searching is oversize, it is impossible to quickly carry out data transmission.
To sum up, there is the technical problem that cell searching time delay is longer or networking flexibility is poor in the prior art.
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 motility high and little
Area 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, have motility high and
Cell searching time delay is short.
The technical scheme of the embodiment of the present invention is as follows:
A kind of method of channel wireless radio multi communication system cell search, described method includes:
Terminal reads K from frequency storage table successively and preferentially broadcasts/synchronize subband；
There is effective Cell Broadcast CB in K preferential broadcast/synchronization subband, and connect according to the reference signal of efficient cell
Receive power RSRP and directly determine cell searching success, then reported result；
There is effective Cell Broadcast CB in K preferential broadcast/synchronization subband, and the RSRP according to efficient cell cannot
Directly determine cell searching success, then weight on the subband determined in efficient cell by Reference Signal Received Quality RSRQ
New search, re-searches for reporting subdistrict after efficient cell is broadcasted and searches for successfully；Otherwise re-read frequency from section start
Storage table；
There is not effective Cell Broadcast CB, then the traversal frequency storage remaining N-K of table in K preferential broadcast/synchronization subband
Individual subband, N is working sub-band number, as long as there being a subband to search efficient cell broadcast on described residue subband,
Then reporting subdistrict is searched for successfully；Otherwise, reporting subdistrict is searched for unsuccessfully.
The effective Cell Broadcast CB of described existence includes: system broadcast information MIB decoding is correct, it is determined that there is efficient cell
Broadcast.
The described RSRP according to efficient cell directly determines that cell searching successfully includes: the RSRP of efficient cell is more than
The threshold value preset, it is determined that cell searching success.
Described re-searching for includes: select in efficient cell on preferential broadcast/synchronization subband that RSRQ maximum is corresponding
Re-search for.
The described efficient cell that re-searches for is broadcasted and is included: on the subband re-searched for, and searches Cell Broadcast CB corresponding
MIB decoding correct, it is determined that re-search for efficient cell and broadcast.
Described method farther includes: record and store the broadcast/synchronization subband of present access subzone.
A kind of channel wireless radio multi communication system cell search terminal, described terminal include search module, control module,
Judge module and communication module；
Search module, is used for being successively read K preferential broadcast/synchronization subband, at Reference Signal Received Quality RSRQ
Re-searching on the subband determined, travel through remaining N-K subband, N is working sub-band number；
Control module, is used for determining whether there is effective Cell Broadcast CB on subband；
Judge module, for determining that cell searching is the most successful according to the Reference Signal Received Power RSRP of efficient cell,
Judgement re-searches for the most successful；
Communication module, searches for successfully failed with cell searching for reporting subdistrict.
Described control module is further used for, and correctly determines that to there is efficient cell wide according to system broadcast information MIB decoding
Broadcast.
Described judge module is further used for, and determines that community is searched according to the RSRP of efficient cell more than the threshold value preset
Suo Chenggong.
Described search module is further used for, the preferential broadcast that RSRQ maximum is corresponding in efficient cell/synchronize subband
On re-search for.
Described judge module is further used for, and is re-searching for the subband of community, is searching the MIB that Cell Broadcast CB is corresponding
Decoding is correct, it is determined that re-searches for efficient cell and broadcasts.
Described communication module is further used for, and records and store the broadcast/synchronization subband of present access subzone.
It can be seen that terminal is successively from frequency storage table reading K in embodiments of the present invention from technique scheme
Preferential/synchronization subband of broadcasting, first judges whether that efficient cell is broadcasted on K preferential broadcast/synchronization subband,
Travel through remaining N-K subband the most again.As long as having a subband there are on K preferential broadcast/synchronization subband
Cell Broadcast CB and the RSRP of effect exceed thresholding, the most directly determine cell searching success reported result；If K
On preferential broadcast/synchronization subband, in all effective Cell Broadcast CBs, neither one RSRP exceedes thresholding, then select RSRQ
Preferential broadcast/synchronization subband that maximum is corresponding re-searches for, and re-searches for effective Cell Broadcast CB i.e. success, otherwise
Frequency storage table is re-read from section start；When on K preferential broadcast/synchronization subband, neither one subband exists effective
, as long as there is a subband on described residue subband in Cell Broadcast CB, the most one by one traversal storage remaining N-K the subband of table
Search effective Cell Broadcast CB, then reporting subdistrict is searched for successfully；Otherwise, reporting subdistrict is searched for unsuccessfully.No matter at K
Whether there is effective Cell Broadcast CB on individual preferential broadcast/synchronization subband, can be combined with particular situation and carry out respectively into one
Step ground judges, compared with prior art, the overall motility of this technical scheme is relatively strong, and is effectively shortened community and searches
The time delay of rope.
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.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention express clearer, below in conjunction with the accompanying drawings and
The present invention is further described in more detail for specific embodiment.
In embodiments of the present invention, when terminal carries out whole subband cell searching, default preferential wide of prioritizing selection K
Broadcasting/synchronize subband, majority of case can detect that efficient cell is broadcasted quickly；When search efficient cell and
When RSRP exceedes thresholding, direct reporting subdistrict is searched for successfully, it is not necessary to all perform K default preferentially broadcasting/synchronize
Subband search procedure；When in all efficient cells on preferential broadcast/synchronization subband, neither one subband RSRP exceedes thresholding
Time, it is also possible to select to re-search on the subband that RSRQ maximum is corresponding in all efficient cells.For broadcast/
Synchronizing subband system not on K default subband, UE cannot search effectively on default broadcast/synchronization subband
Cell Broadcast CB, will travel through other residue subbands successively until searching efficient cell broadcast, and reporting subdistrict is searched for successfully.
Owing to technical scheme divides three kinds of situations to process the broadcast of search efficient cell, therefore overall motility is relatively strong,
The time delay of cell searching it is effectively shortened relative to prior art.
1 describe technical scheme in detail below in conjunction with the accompanying drawings.
Channel wireless radio multi communication system uses semi-static broadcast/synchronization subband arrangement.K of base station is extensively under normal circumstances
Broadcast/synchronize subband arrangement at default subband frequency, referred to as K preferential broadcast/synchronize subband.Only at specific industry
Under the conditions of application or special networking, broadcast/synchronization subband is arranged in other available subbands according to actual environment.
Step 101, terminal are successively read K preferential broadcast/synchronization subband from frequency allocation list, perform efficient cell
Broadcast search processing procedure.
Step 102, in the preferential broadcast of K/synchronize to judge whether that efficient cell is broadcasted on subband.
The determination process of efficient cell broadcast includes: community ID detection, time and Frequency Synchronization and MIB decoding, on
State three steps to carry out successively, determine that MIB decoding is correctly just implemented after the first two steps is correctly completed.
Therefore can be the most correct according to MIB decoding, judge that above three process is the most all correctly completed.If MIB translates
Code is correct, it is determined that there is effective Cell Broadcast CB on this subband；Otherwise, i.e. MIB decoding error then determines on this subband
Efficient cell is not had to broadcast.If there is effective Cell Broadcast CB on K preferential broadcast/synchronization subband, then perform step 103；
If not having efficient cell to broadcast on K preferential broadcast/synchronization subband, then perform step 105.
Step 103, judge that certain efficient cell RSRP exceedes thresholding.
Determine that cell searching is the most successful according to RSRP.Terminal calculates RSRP, if calculated RSRP is more than
The threshold value preset, shows that this subband signal is especially good, and cell searching success, direct reporting subdistrict is searched for successfully；If
Calculated RSRP less than or equal to the threshold value preset, then illustrates preferentially to broadcast/synchronize subband not letter at K
Number particularly preferred subband, it is necessary to carry out group and search comparison procedure, perform step 104.
The subband that in step 104, selection efficient cell, RSRQ maximum is corresponding, re-searches on this subband.
If not being successfully searched the particularly preferred subband of signal at K preferential broadcast/synchronization subband, then need to carry out group and search
Relatively, the subband that in efficient cell, RSRQ maximum is corresponding is i.e. selected to re-search for.After re-searching for, if
The subband MIB decoding corresponding at RSRQ maximum is correct, it is determined that re-search for successfully, and reporting subdistrict is searched for into
Merit；If at the subband MIB decoding error that RSRQ maximum is corresponding, then restarting whole cell searching flow process, then own
State resets, and re-reads frequency storage table from section start, i.e. returns step 101.
Step 105, terminal travel through remaining N-K subband.
If there is not effective Cell Broadcast CB on K preferential broadcast/synchronization subband, then travel through remaining N-K subband,
N is working sub-band number.
Effective Cell Broadcast CB is there is in step 106, judgement residue subband on subband.
If the MIB decoding that in residue subband, subband is corresponding is correct, i.e. determines in residue subband and there is efficient cell on subband
Broadcast；Otherwise, there is not effective Cell Broadcast CB in residue subband on subband, reporting subdistrict is searched for unsuccessfully.
If additionally, cell searching success, UE will preserve current broadcast/synchronization subband, replaces allocation list Central Plains
The preferential broadcast come/synchronize subband.When UE starting up's cell searching next time, this community can be rapidly selected
The broadcast of actual disposition/synchronization subband.
See the terminal structure schematic diagram that accompanying drawing 2 is the search of channel wireless radio multi communication system cell, channel wireless radio multi communication
The terminal of system cell search includes: search module 201, control module 202, judge module 203 and communication module
204。
Search module 201, is used for being successively read K preferential broadcast/synchronization subband, weight on the subband that RSRQ determines
New search, travels through remaining N-K subband, and N is working sub-band number；It is further used at RSRQ maximum pair
The preferential broadcast answered/synchronize to re-search on subband.
Control module 202, is used for determining whether there is effective Cell Broadcast CB on subband；It is further used for according to MIB
Decoding correctly determines and there is effective Cell Broadcast CB.
According to the RSRP of efficient cell, judge module 203, for determining that cell searching is the most successful, it is judged that again search
Rope is the most successful；Cell searching success is determined more than the threshold value preset further according to the RSRP of efficient cell；Enter
One step is for correctly determining and re-search for successfully according to re-searching for MIB decoding corresponding to the subband of community.
Communication module 204, searches for successfully failed with cell searching for reporting subdistrict；It is further used for record and stores
The broadcast of present access subzone/synchronization subband.
The above, only presently preferred embodiments of the present invention, it is not intended to limit protection scope of the present invention.
All within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, all should comprise
Within protection scope of the present invention.
Claims (12)
1. the method for a channel wireless radio multi communication system cell search, it is characterised in that described method includes:
Terminal reads K from frequency storage table successively and preferentially broadcasts/synchronize subband；
There is effective Cell Broadcast CB in K preferential broadcast/synchronization subband, and connect according to the reference signal of efficient cell
Receive power RSRP and directly determine cell searching success, then reported result；
There is effective Cell Broadcast CB in K preferential broadcast/synchronization subband, and the RSRP according to efficient cell cannot
Directly determine cell searching success, then weight on the subband determined in efficient cell by Reference Signal Received Quality RSRQ
New search, re-searches for reporting subdistrict after efficient cell is broadcasted and searches for successfully；Otherwise re-read frequency from section start
Storage table；
There is not effective Cell Broadcast CB, then the traversal frequency storage remaining N-K of table in K preferential broadcast/synchronization subband
Individual subband, N is working sub-band number, as long as there being a subband to search efficient cell broadcast on described residue subband,
Then reporting subdistrict is searched for successfully；Otherwise, reporting subdistrict is searched for unsuccessfully.
The method of channel wireless radio multi communication system cell search the most according to claim 1, it is characterised in that described
There is effective Cell Broadcast CB to include: system broadcast information MIB decoding is correct, it is determined that there is effective Cell Broadcast CB.
The method of channel wireless radio multi communication system cell search the most according to claim 1, it is characterised in that described
RSRP according to efficient cell directly determines that cell searching successfully includes: the RSRP of efficient cell is more than the door preset
Limit value, it is determined that cell searching success.
The method of channel wireless radio multi communication system cell search the most according to claim 1, it is characterised in that described
Re-search for including: select again to search on preferential broadcast/synchronization subband that RSRQ maximum is corresponding in efficient cell
Rope.
The method of channel wireless radio multi communication system cell search the most according to claim 1, it is characterised in that described
Re-search for efficient cell to broadcast and include: on the subband re-searched for, the MIB searching Cell Broadcast CB corresponding translates
Code is correct, it is determined that re-searches for efficient cell and broadcasts.
The method of channel wireless radio multi communication system cell search the most according to claim 1, it is characterised in that described
Method farther includes: record and store the broadcast/synchronization subband of present access subzone.
7. the terminal of a channel wireless radio multi communication system cell search, it is characterised in that described terminal includes searching for mould
Block, control module, judge module and communication module；
, for there is effective Cell Broadcast CB on K preferential broadcast/synchronization subband, and according to the least in search module
In the case of the RSRP in district cannot directly determine that cell searching is successfully, by Reference Signal Received Quality in efficient cell
Re-search on the subband that RSRQ determines；K preferential broadcast/synchronization subband does not exist the feelings of effective Cell Broadcast CB
Under condition, traversal frequency storage remaining N-K the subband of table；N is working sub-band number；
Control module, is used for determining whether there is effective Cell Broadcast CB on subband；
Judge module, for determining that cell searching is the most successful according to the Reference Signal Received Power RSRP of efficient cell,
Judge to re-search on the subband determined by Reference Signal Received Quality RSRQ in efficient cell the most successfully；
, for there is effective Cell Broadcast CB on K preferential broadcast/synchronization subband, and according to the least in communication module
The Reference Signal Received Power RSRP in district directly determines cell searching success, then reported result；At described search module
Re-search for reporting subdistrict after efficient cell is broadcasted to search for successfully；At described search module K preferential broadcast/synchronization
In the case of there is not effective Cell Broadcast CB on subband, traversal frequency storage remaining N-K the subband of table, described residue
As long as there being a subband to search efficient cell broadcast on subband, then reporting subdistrict is searched for successfully；Otherwise, reporting subdistrict
Search for unsuccessfully.
The terminal of channel wireless radio multi communication system cell search the most according to claim 7, it is characterised in that described
Control module is further used for, and correctly determines according to system broadcast information MIB decoding and there is effective Cell Broadcast CB.
The terminal of channel wireless radio multi communication system cell search the most according to claim 7, it is characterised in that described
Judge module is further used for, and determines cell searching success according to the RSRP of efficient cell more than the threshold value preset.
The terminal of channel wireless radio multi communication system cell search the most according to claim 7, it is characterised in that institute
State search module to be further used for, on preferential broadcast/synchronization subband that RSRQ maximum is corresponding in efficient cell again
Search.
11. terminals that channel wireless radio multi communication system cell is searched for according to claim 7, it is characterised in that institute
State judge module to be further used for, re-searching for the subband of community, search MIB corresponding to Cell Broadcast CB and just decoding
Really, it is determined that re-search for efficient cell and broadcast.
12. terminals that channel wireless radio multi communication system cell is searched for according to claim 7, it is characterised in that institute
State communication module to be further used for, record and store the broadcast/synchronization subband of present access subzone.
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| CN201210243410.XA CN103546939B (en) | 2012-07-13 | 2012-07-13 | The method of a kind of channel wireless radio multi communication system cell search and terminal |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN110312321B (en) * | 2019-05-10 | 2020-12-11 | 展讯通信（上海）有限公司 | Method, device and terminal for determining random access resident frequency point |
| 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 |
| CN112770374B (en) * | 2021-03-09 | 2023-01-17 | 深圳市广和通无线股份有限公司 | Network registration method and terminal equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| WO2012035764A1 (en) * | 2010-09-15 | 2012-03-22 | 株式会社ソニー・コンピュータエンタテインメント | Wireless communication device, wireless communication system and channel switching method |
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| JP4438054B2 (en) * | 2004-05-31 | 2010-03-24 | キヤノン株式会社 | COMMUNICATION SYSTEM, COMMUNICATION DEVICE, ACCESS POINT, COMMUNICATION METHOD, AND PROGRAM |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| WO2012035764A1 (en) * | 2010-09-15 | 2012-03-22 | 株式会社ソニー・コンピュータエンタテインメント | Wireless communication device, wireless communication system and channel switching method |
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