CN104159247A - Network searching method, device, terminal and base station - Google Patents
Network searching method, device, terminal and base station Download PDFInfo
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- CN104159247A CN104159247A CN201310177357.2A CN201310177357A CN104159247A CN 104159247 A CN104159247 A CN 104159247A CN 201310177357 A CN201310177357 A CN 201310177357A CN 104159247 A CN104159247 A CN 104159247A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/18—Selecting a network or a communication service
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Abstract
The invention discloses a network searching method, device, terminal and base station, and is used for quick network searching when a terminal is started. The network searching method includes: scanning usable frequency points; judging whether the currently scanned usable frequency points are recorded in a second list which includes neighboring cell frequency points or different format type neighboring cell frequency points and public land mobile network (PLMN) information corresponding the frequency points; when the usable frequency points are recorded in the second list, updating PLMN information corresponding to the usable frequency points to a first list which is used for storing usable PLMN information; and scanning all usable frequency points, reporting the PLMN information in the first list to a non-access-stratum (NAS) of a terminal, and the PLMN information being used for network searching. By adoption of the technical scheme of the network searching method, time for cell reselection is saved, and time for network searching is greatly optimized.
Description
Technical field
The invention belongs to moving communicating field, concrete, relate to a kind of network searching method, device, terminal and base station.
Background technology
Mobile phone is just started shooting for the first time, if there is no the PLMN(Public Land Mobile Network of registration last time, public land mobile network), mobile phone need to carry out PLMN selection, and the selection of this PLMN can be divided into automatically and manual two kinds of forms.Automatically so-called, refer to UE(User Equipment, subscriber equipment) according to the priority criteria of establishing in advance, independently complete search and the selection of PLMN. manually so-called, refer to that UE presents to user by the PLMN list satisfying condition, and is made one's options by user.
No matter be automatic mode or manual mode, UE AS(Access-stratum, Access Layer) all need existing PLMN list in network to be reported to UE NAS(Non-Access-stratum Non-Access Stratum), for this reason, UE AS, according to the ability of self and setting, carries out the search of full frequency band, search signal Qiang community on each frequency, read its system information, report to UE NAS, by NAS layer, decide PLMN search whether to proceed.
Terminal is the in the situation that of existing information and information, and meeting active searching network condition around, indicates by resolving all PLMN, arranges out available PLMN list 1, and reports user so that the process that manual network is selected.Frequency range of LTE reaches 100MHz(such as 2300MHz～2400Mhz), in the PLMN process of PLMN search, need to scan frequency up to 1000 like this.
And PLMN search target is the current available PLMN identification list of search, and the information of PLMN sign must be passed through the system message SIB1(SystemInformation Block1 of community, system information block 1) in, obtain, want to obtain SIB1 and must first obtain cell synchronous, then by MIB(Main information Block, Master Information Block) obtain frame number information, then just can calculate the position of SIB1, SIB1 could be on precalculated position, received, just the identification information of PLMN can be obtained after then obtaining SIB1.Whole PLMN search procedure often needs the time of several minutes, and user need to wait for that the very so long time just can obtain PLMN list, and this process also can cause the consumption of battery electric quantity fast.
UE, after having selected PLMN, select suitable community to carry out resident by the selection course of community, and community meets S criterion, and is not prohibited, and its PLMN meets the requirements and could allow registration.
Therefore there is long problem consuming time in existing terminal network searching method.
Summary of the invention
The present invention discloses a kind of network searching method, device, terminal and base station, for solving the network searching method that prior art exists, has long problem consuming time.
For achieving the above object, according to a first aspect of the invention, provide a kind of network searching method, and adopt following technical scheme:
Network searching method, is applied to terminal, comprising: scan available frequency; Whether the described available frequency that judges current scanning is recorded in described the second list, and described the second list comprises neighbor cell frequency or different standard adjacent area frequency and the public land mobile network information corresponding with described frequency; When described available frequency is recorded in described the second list, upgrade the corresponding described public land mobile network information of described available frequency in the first list, described the first list is for storing available described public land mobile network information; Scan all available frequencies, and by the described public land mobile network information reporting in described the first list the Non-Access Stratum NAS to terminal, described Public Mobile Network information is used for looking for net.
Further, before the available frequency of described scanning, described network searching method also comprises by physical downlink control channel PDCCH and obtains system information; According to described system information, obtain neighbor cell frequency or different standard adjacent area frequency and the public land mobile network information corresponding with described frequency; Upgrade described public land mobile network information to described the second list.
Further, describedly according to described system information, obtain neighbor cell frequency or different standard frequency and the public land mobile network information corresponding with described frequency and comprise: described system information comprises system information block 1, according to the schedule information in described system information block 1, obtain system information block 5, system information block 6 and system information block 7, described system information block 5, the information content of described system information block 6 and described system information block 7 comprises described neighbor cell frequency or described different standard frequency and the described public land mobile network information corresponding with described frequency.
Further, in the time of in described current scanning frequency is not recorded in described the second list, described network searching method also comprises: by physical downlink control channel PDCCH, obtain system information, described system information comprises system information block 1; Resolve described system information block 1, obtain the described public land mobile network information that described system information block 1 comprises, and described public land mobile network information updating in described the first list.
Further, described and the described public land mobile network information reporting in described the first list is used for to look for net to the Non-Access Stratum NAS of terminal before, described network searching method also comprises: judge whether all described available frequencies of scanning; When described available frequency is not all scanned, select next available frequency and return and carry out the available frequency of described scanning.
According to a second aspect of the invention, provide a kind of net arrangement of looking for, and adopt following technical scheme:
Look for net arrangement, be applied to terminal, comprising: scan module, for scanning available frequency; Judge module, for judging whether the described available frequency of current scanning is recorded in described the second list, described the second list comprises neighbor cell frequency or different standard adjacent area frequency and the public land mobile network information corresponding with described frequency; The first update module, for when described available frequency is recorded in described the second list, upgrade the corresponding described public land mobile network information of described available frequency in the first list, described the first list is for storing available described public land mobile network information; Reporting module, for scanning all available frequencies, and by the described public land mobile network information reporting in described the first list the Non-Access Stratum NAS to terminal, described Public Mobile Network information is used for looking for net.
Further, the described net arrangement of looking for also comprises the first acquisition module, for obtaining system information by physical downlink control channel PDCCH; The second acquisition module, for obtaining neighbor cell frequency or different standard adjacent area frequency and the public land mobile network information corresponding with described frequency according to described system information; The second update module, for upgrading described public land mobile network information to described the second list.
Further, described the second acquisition module comprises: the 3rd acquisition module, for described system information, comprise system information block 1, according to the schedule information in described system information block 1, obtain system information block 5, system information block 6 and system information block 7, the information content of described system information block 5, described system information block 6 and described system information block 7 comprises described neighbor cell frequency or described different standard frequency and the described public land mobile network information corresponding with described frequency.
Further, the described net arrangement of looking for also comprises: the 4th acquisition module, for when described current scanning frequency is not recorded in described the second list, by physical downlink control channel PDCCH, obtain system information, described system information comprises system information block 1; Parsing module, for resolving described system information block 1, obtains the described public land mobile network information that described system information block 1 comprises, and described public land mobile network information updating in described the first list.
A progressive ground, the described net arrangement of looking for also comprises: the second judge module, for judging whether all described available frequencies of scanning; Return to Executive Module, for when described available frequency is not all scanned, select next available frequency and return and carry out the available frequency of described scanning.
According to a third aspect of the present invention, provide a kind of terminal, and adopt following technical scheme:
Terminal comprises the above-mentioned net arrangement of looking for.
Adopt technique scheme of the present invention, can so that UE in advance neighbor cell is judged, avoid occurring finding that the PLMN of this community was FPLMN after gravity treatment is in the past, UE need to look for the situation of other communities again.So also save the time that community reselects, optimized widely the time of looking for net.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 represents the main flow chart of the network searching method described in the embodiment of the present invention;
Fig. 2 represents the network searching method particular flow sheet described in the embodiment of the present invention;
Fig. 3 represents to look for net arrangement structural representation described in the embodiment of the present invention;
Fig. 4 represents that the base station system message described in the embodiment of the present invention sends schematic diagram.
Embodiment
Accompanying drawing is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 represents the main flow chart of the network searching method described in the embodiment of the present invention.
Shown in Figure 1, network searching method comprises:
S101: scan available frequency;
S103: whether the described available frequency that judges current scanning is recorded in described the second list, described the second list comprises neighbor cell frequency or different standard adjacent area frequency and the public land mobile network information corresponding with described frequency;
S105: when described available frequency is recorded in described the second list, upgrade the corresponding described public land mobile network information of described available frequency in the first list, described the first list is for storing available described public land mobile network information;
S107: scan all available frequencies, and by the described public land mobile network information reporting in described the first list the NAS to terminal, described Public Mobile Network information is used for looking for net.
In technique scheme of the present invention, can come from statistics LTE frequency range by frequency in step S101, select an available frequency to scan, in step S103, whether the described available frequency that judges current scanning is recorded in described the second list, neighbor cell frequency or different standard adjacent area frequency and the public land mobile network information corresponding with described frequency in described the second list, have been deposited in advance, above-mentioned neighbor cell frequency or different standard adjacent area frequency and the public land mobile network information corresponding with described frequency can be obtained in system information, in step S105, for the frequency being recorded in the second list, upgrade in public land mobile network information to the first list of this frequency, the first list is for storing available described public land mobile network information, in step S107, after scanning all available frequencies, by UE AS, report described public land mobile network information reporting in described the first list to the NAS of UE, described Public Mobile Network information is used for looking for net.
According to technique scheme of the present invention, UE is under network coverage environment more than, and its frequency is around a lot, and community is a lot, and network is a lot, looks for net spee faster.Take 100MHz frequency range as example, possible center frequency point number is 1000, if adopt existing PLMN searching method, the search of the PLMN of each frequency sign needs minimum time to be configured to: 30ms(synchronously searches for, search for for 3 times unsuccessfully and release)+40ms(MIB reception)+80ms(SIB1 reception), 150ms altogether, 1000 frequencies need 150s, this is for a stand-by period beyond affordability of user Lai Shuoshi, and the method that invention proposes, if the neighbor cell frequency in discovery system message has 3, once reduce the time of 450ms, if can find 3 adjacent area frequencies at every turn, ideally need the time of 37.5s just can scan, than the minimizing user concerning user who originally shortened for 3/4. such PLMN search time, experience lifting very large.
Fig. 2 represents the network searching method particular flow sheet described in the embodiment of the present invention.
Shown in Figure 2, network searching method can comprise the steps:
Step 20: all frequency numbers in statistics LTE frequency range;
Step 21:RSSI measures, and filters out N the available frequency that feature RSSI is greater than r;
Select the available frequency in LTE frequency range, at each, may in center frequency point, calculate its RSCP(received signal strength indicator), detect the frequency of RSCP>r, r=-84dBm narrows down to by optional frequency number the scope that is not more than N like this.
Step 22: select the available frequency in LTE frequency range.
Step 23: judge that frequency whether in the second list, if so, performs step 33, perform step if not 24
Step 24: by PSS(Primary Synchroniza-tion Signal, master sync signal) main synchronous and SSS(Secondary synchroniza-tion Signal, auxiliary synchronous signals) auxiliary synchronous, obtain the synchronizing information of a frequency, after synchronizing information obtains, terminal is at PDCCH(Physical downlink control channel, physical down control information) within the scope of maximum control domain, detect SI-RNTI, and according to the DCI(downlink control information resolving, physical down control information) receive PDSCH(Physical Downlink Shared Channel, Physical Downlink Shared Channel), parse SIB1 message.
Step 25: receive the main message of MIB;
Step 26: receive SIB1 information by PHICH;
Step 27: obtain SIB1 information according to PDCCH;
Step 28: resolve SIB1 information acquisition PLMN sign, after obtaining the PLMN sign of this community, if this PLMN identifies available and is the content not having in the first list, this PLMN sign can be added to freelist, upgrade the first available list.
Step 29:SIB5 message comprises the relevant information of alien-frequency district gravity treatment, and these information are for cell reselection LTE alien frequencies and adjacent cell alien frequencies information.SIB6 comprises that the frequency point information .SIB7 of the different standard of WCDMA is the frequency point information that comprises the different standard of GSM.These system messages are all interactive maintenance by maintenance console configuration information and other base stations by base station eNB, and the network information that each frequency configures can be known equally in base station, just comprises PLMN information in this network information.Therefore frequency can be handed down to terminal in these system message base stations together with PLMN.
Step 30: terminal is obtained SIB5 according to schedule information in SIB1 message, SIB6, SIB7 message, resolve SIB5 and SIB6, the message of SIB7, can get different frequent points and corresponding PLMN information, and these information are preserved and are maintained in another second list of internal memory.
In scanning, just judge during second effective frequency and select frequency whether in the second list, if just can go out PLMN information by direct index in this table, thereby be updated to simply in the first list.If do not index out selection frequency, by former flow process, continue the information that synchronized cells obtains synchronous the first list and the second list after SIB message.
Step 31: judge whether to travel through all frequencies, if not, continue to carry out former step, repeat this frequency point scanning, until travel through all available frequencies.
Step 32: if scanned all frequencies, the list information of the first list is reported to UE NAS layer or present and be shown to user and manually select.
Step 33: the corresponding informance in the second list is updated in the first list.
Adopt technique scheme of the present invention, can so that UE in advance neighbor cell is judged, avoid occurring finding that the PLMN of this community was FPLMN after gravity treatment is in the past, UE need to look for the situation of other communities again.So also save the time that community reselects, optimized widely the time of looking for net.
Fig. 3 represents to look for net arrangement structural representation described in the embodiment of the present invention.
Below in conjunction with accompanying drawing 3, the present invention will be described.
Technical scheme of the present invention is achieved in that
When acquiring SIB1 message by PDCCH in mobile terminal, also to accept SIB5(SystemInformation Block5, system information block 5), SIB6(SystemInformation Block6, system information block 6) message, SIB7(SystemInformation Block7, system information block 7) message.
SIB5 need to be revised in base station simultaneously, SIB6, the message content of SIB7, by the corresponding PLMN information of frequency that adds below of carrier frequency frequency point information dl-CarrierFreq, this PLMN information base station need to be by X2 interface or S1-MME interface by Access Network and core net obtaining information.
Last terminal adds the pilot frequency point of corresponding neighbor cell or different standard and corresponding PLMN sign in the table 2 of internal memory.Terminal can be by frequency index in the second list of scanning at the next frequency of scanning, if index less than; by original flow process synchronized cells, obtain SIB1 and upgrade the first list, if index the frequency of scanning, need not carry out synchronized cells, directly the information of PLMN be taken out from the second list to the PLMN information of upgrading the first list.
Referring to following base station side step:
Step 1: at the network information module of the integration neighbor cell of base station side, by between base station, the interface between base station and core net, carries out obtaining of the neighbor cell network information.
Step 2: add module in the neighbor cell of base station side system message, add the corresponding PLMN information of corresponding neighbor cell frequency, be encapsulated in SIB message.
Step 3: base station transmission system message is to UE.
Step 4: end side system message parsing module, carries out the parsing of system message.
Step 5: terminal by the corresponding PLMN information updating of the neighbor cell frequency parsing in internal memory.
Fig. 4 represents that the base station system message described in the embodiment of the present invention sends schematic diagram.
Shown in Figure 4, look for net arrangement, comprising: scan module 401, for scanning available frequency; Judge module 403, for judging whether the described available frequency of current scanning is recorded in described the second list, described the second list comprises neighbor cell frequency or different standard adjacent area frequency and the public land mobile network information corresponding with described frequency; The first update module 405, for when described available frequency is recorded in described the second list, upgrade the corresponding described public land mobile network information of described available frequency in the first list, described the first list is for storing available described public land mobile network information; Reporting module 407, for scanning all available frequencies, and by the described public land mobile network information reporting in described the first list the NAS to terminal, described Public Mobile Network information is used for looking for net.
Alternatively, the described net arrangement of looking for also comprises the first acquisition module (not shown), for obtaining system information by physical downlink control channel PDCCH; The second acquisition module (not shown), for obtaining neighbor cell frequency or different standard adjacent area frequency and the public land mobile network information corresponding with described frequency according to described system information; The second update module (not shown), for upgrading described public land mobile network information to described the second list.
Alternatively, described the second acquisition module (not shown) comprises: the 3rd acquisition module (not shown), for described system information, comprise system information block 1, according to the schedule information in described system information block 1, obtain system information block 5, system information block 6 and system information block 7, the information content of described system information block 5, described system information block 6 and described system information block 7 comprises described neighbor cell frequency or described different standard frequency and the described public land mobile network information corresponding with described frequency.
Alternatively, the described net arrangement of looking for also comprises: the 4th acquisition module (not shown), for when described current scanning frequency is not recorded in described the second list, by physical downlink control channel PDCCH, obtain system information, described system information comprises system information block 1; Parsing module, for resolving described system information block 1, obtains the described public land mobile network information that described system information block 1 comprises, and described public land mobile network information updating in described the first list.
Alternatively, the described net arrangement of looking for also comprises: the second judge module (not shown), for judging whether all described available frequencies of scanning; Return to Executive Module (not shown), for when described available frequency is not all scanned, select next available frequency and return and carry out the available frequency of described scanning.
The invention provides a kind of terminal and comprise the above-mentioned net arrangement of looking for.
Adopt technique scheme of the present invention, can so that UE in advance neighbor cell is judged, avoid occurring finding that the PLMN of this community was FPLMN after gravity treatment is in the past, UE need to look for the situation of other communities again.So also save the time that community reselects, optimized widely the time of looking for net.
Claims (11)
1. a network searching method, is applied to terminal, it is characterized in that, comprising:
Scan available frequency;
Whether the described available frequency that judges current scanning is recorded in described the second list, and described the second list comprises neighbor cell frequency or different standard adjacent area frequency and the public land mobile network information corresponding with described frequency;
When described available frequency is recorded in described the second list, upgrade the corresponding described public land mobile network information of described available frequency in the first list, described the first list is for storing available described public land mobile network information;
Scan all available frequencies, and by the described public land mobile network information reporting in described the first list the Non-Access Stratum NAS to terminal, described Public Mobile Network information is used for looking for net.
2. network searching method as claimed in claim 1, is characterized in that, before the available frequency of described scanning, described network searching method also comprises
By physical downlink control channel PDCCH, obtain system information;
According to described system information, obtain neighbor cell frequency or different standard adjacent area frequency and the public land mobile network information corresponding with described frequency;
Upgrade described public land mobile network information to described the second list.
3. network searching method as claimed in claim 2, is characterized in that, describedly according to described system information, obtains neighbor cell frequency or different standard frequency and the public land mobile network information corresponding with described frequency and comprises:
Described system information comprises system information block 1, according to the schedule information in described system information block 1, obtain system information block 5, system information block 6 and system information block 7, the information content of described system information block 5, described system information block 6 and described system information block 7 comprises described neighbor cell frequency or described different standard frequency and the described public land mobile network information corresponding with described frequency.
4. network searching method as claimed in claim 1, is characterized in that, in the time of in described current scanning frequency is not recorded in described the second list, described network searching method also comprises:
By physical downlink control channel PDCCH, obtain system information, described system information comprises system information block 1;
Resolve described system information block 1, obtain the described public land mobile network information that described system information block 1 comprises, and described public land mobile network information updating in described the first list.
5. network searching method as claimed in claim 1, is characterized in that, described and the described public land mobile network information reporting in described the first list is used for to look for net to the Non-Access Stratum NAS of terminal before, described network searching method also comprises:
Judge whether all described available frequencies of scanning;
When described available frequency is not all scanned, select next available frequency and return and carry out the available frequency of described scanning.
6. look for a net arrangement, be applied to terminal, it is characterized in that, comprising:
Scan module, for scanning available frequency;
Judge module, for judging whether the described available frequency of current scanning is recorded in described the second list, described the second list comprises neighbor cell frequency or different standard adjacent area frequency and the public land mobile network information corresponding with described frequency;
The first update module, for when described available frequency is recorded in described the second list, upgrade the corresponding described public land mobile network information of described available frequency in the first list, described the first list is for storing available described public land mobile network information;
Reporting module, for scanning all available frequencies, and by the described public land mobile network information reporting in described the first list the Non-Access Stratum NAS to terminal, described Public Mobile Network information is used for looking for net.
7. the net arrangement of looking for as claimed in claim 6, is characterized in that, also comprises
The first acquisition module, for obtaining system information by physical downlink control channel PDCCH;
The second acquisition module, for obtaining neighbor cell frequency or different standard adjacent area frequency and the public land mobile network information corresponding with described frequency according to described system information;
The second update module, for upgrading described public land mobile network information to described the second list.
8. the net arrangement of looking for as claimed in claim 6, is characterized in that, described the second acquisition module comprises:
The 3rd acquisition module, for described system information, comprise system information block 1, according to the schedule information in described system information block 1, obtain system information block 5, system information block 6 and system information block 7, the information content of described system information block 5, described system information block 6 and described system information block 7 comprises described neighbor cell frequency or described different standard frequency and the described public land mobile network information corresponding with described frequency.
9. the net arrangement of looking for as claimed in claim 6, is characterized in that, also comprises:
The 4th acquisition module, for when described current scanning frequency is not recorded in described the second list, obtains system information by physical downlink control channel PDCCH, and described system information comprises system information block 1;
Parsing module, for resolving described system information block 1, obtains the described public land mobile network information that described system information block 1 comprises, and described public land mobile network information updating in described the first list.
10. the net arrangement of looking for as claimed in claim 1, is characterized in that, also comprises:
The second judge module, for judging whether all described available frequencies of scanning;
Return to Executive Module, for when described available frequency is not all scanned, select next available frequency and return and carry out the available frequency of described scanning.
11. 1 kinds of terminals, is characterized in that, comprise the net arrangement of looking for described in claim 6 to 10 any one.
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| CN201310177357.2A CN104159247A (en) | 2013-05-14 | 2013-05-14 | Network searching method, device, terminal and base station |
| PCT/CN2013/080573 WO2013174355A2 (en) | 2013-05-14 | 2013-07-31 | Network searching method, device, terminal and base station |
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| CN201310177357.2A CN104159247A (en) | 2013-05-14 | 2013-05-14 | Network searching method, device, terminal and base station |
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| CN106550429A (en) * | 2015-09-16 | 2017-03-29 | 青岛海信移动通信技术股份有限公司 | A kind of method for searching network and terminal |
| CN107094311A (en) * | 2017-06-26 | 2017-08-25 | 奇酷互联网络科技（深圳）有限公司 | The method, device and mobile terminal of high standard network reselection |
| CN113068230A (en) * | 2019-12-16 | 2021-07-02 | 成都鼎桥通信技术有限公司 | Network state switching method and equipment for terminal |
| CN113068230B (en) * | 2019-12-16 | 2022-11-01 | 成都鼎桥通信技术有限公司 | Network state switching method and equipment for terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013174355A3 (en) | 2014-04-24 |
| WO2013174355A2 (en) | 2013-11-28 |
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Application publication date: 20141119 |