CN109286963A - A kind of method for searching network, device and terminal - Google Patents
A kind of method for searching network, device and terminal Download PDFInfo
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- CN109286963A CN109286963A CN201811232578.4A CN201811232578A CN109286963A CN 109286963 A CN109286963 A CN 109286963A CN 201811232578 A CN201811232578 A CN 201811232578A CN 109286963 A CN109286963 A CN 109286963A
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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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- 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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- Computer Networks & Wireless Communication (AREA)
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Abstract
The present invention provides a kind of method for searching network, device and terminals, comprising: when net is searched in unlatching, specified band information, preferential frequency point information and target public land mobile network information are notified the access layer of the terminal by the Non-Access Stratum of terminal；The specified band information, the preferential frequency point information are notified the physical layer of the terminal by the access layer；The physical layer carries out cell searching on the specified band information, and access layer described in the information reporting of the cell searched；When described search to cell be Target cell when, Non-Access Stratum described in information reporting of the access layer the Target cell；Wherein, Target cell is the cell for having target public land mobile network information；The Non-Access Stratum selects the Target cell to be resident.The present invention can accelerate to search net spee, reduce power consumption of terminal.
Description
Technical field
The present invention relates to mobile communication technology field, espespecially a kind of method for searching network, device and terminal.
Background technique
For cellular mobile communication networks, including 2G/3G/4G/5G and low-power consumption wide area network (enhanced machine
Type communication eMTC, narrowband Internet of Things NB-IoT), searching net is an important process, and how it solves terminal in numerous interference
In network, one's own most suitable network resident is found.
In mobile communication, there is public land mobile network mark (PLMN ID, a Public Land Mobile
Network ID), for identifying network essential attribute, the mark whole world is unique.
PLMN ID is saved in terminal, for indicating which network is the terminal can access.It is also wrapped in network system message
PLMN ID is contained, for indicating which operator the network belongs to.When searching net, parsed from the message of network cell
To PLMN ID, if the PLMN ID and PLMN ID of terminal local matching, then it represents that terminal can be attempted to access this network.
Numerous PLMN ID is saved in usual terminal, is divided into: Home PLMN (HPLMN, Home PLMN), equivalent ownership
PLMN (OPLMN, the Operator Controlled that PLMN (EHPLMN, Equivalent Home PLMN), operator control
PLMN), the PLMN (UPLMN, User ControlledPLMN) of user's control.
Terminal has priority orders when searching net, to the selection of PLMN, in general, HPLMN=EHPLMN >
UPLMN>OPLMN>otherPLMN；It when searching net, needs preferentially to find the PLMN of highest priority, attempts access.
General terminal is layering, is generally divided into Non-Access Stratum (NAS, Non-Access when realizing communication protocol
Stratum), access layer (AS, Access Stratum), physical layer (PHY, Physical).From the point of view of searching the process of net, each layer
It implements function such as respectively:
Non-Access Stratum: realizing the priority ranking of PLMN, and the frequency range and frequency point information of net are searched in management；
Access layer: cell information management and the parsing of network system message are realized；
Physical layer: in specified frequency range, searching for network timing on frequency point, attempts to receive network system message.
It is common to search net process by taking NB-IoT as an example:
1) net (PLMN search) process is searched in Non-Access Stratum unlatching, and corresponding band information is issued access layer；
2) corresponding band information is issued physical layer by access layer；
3) physical layer searches for subzone network synchronization signal in specified frequency range, and attempts to receive the necessary system of cell
Information (MIB, Master Information Block), system message (SIB, System Information Block) etc.；
4) physical layer frequency point, Physical Cell Identifier, MIB, SIB of cell etc. inform access layer, access layer parse MIB,
SIB obtains PLMN ID from SIB, saves relevant information in local；
5) access layer continues searching next cell, repetition step 3), 4 by physical layer), it is specified until physical layer has been searched for
Frequency range, find not new cell；
6) access layer is by all cell informations searched out: PLMN ID, Tracking Area Code (TAC, Tracking Area
) etc. Code information inform Non-Access Stratum；
7) Non-Access Stratum selects the cell of highest priority PLMN to be resident according to PLMN priority.
The above process has the disadvantage in that
Since access layer does not know the priority orders of each PLMN, it is possible that having searched out highest priority
PLMN, access layer still can allow physical layer to continue searching next cell, finish until searching in specified frequency range.This can lead
Causing terminal to search, the net time is long, and access is slow, more power consumption.
Summary of the invention
The object of the present invention is to provide a kind of method for searching network, device and terminals, net can be searched with increasing terminal, so that terminal
It can quickly access, to reduce power consumption of terminal.
Technical solution provided by the invention is as follows:
A kind of method for searching network, comprising: when net is searched in unlatching, the Non-Access Stratum of terminal is by specified band information, preferential
Frequency point information and target public land mobile network information notify the access layer of the terminal；The access layer will be described specified
Band information, the preferential frequency point information notify the physical layer of the terminal；The physical layer is in the specified frequency range letter
Cell searching is carried out on breath, and access layer described in the information reporting of the cell searched；When described search to cell be mesh
When marking cell, Non-Access Stratum described in information reporting of the access layer the Target cell；Wherein, Target cell is that have target
The cell of public land mobile network information；The Non-Access Stratum selects the Target cell to be resident.
In the above-mentioned technical solutions, by the way that target PLMN information is notified access layer, so that after searching Target cell
It can be resident immediately, without all cells of removal search, this increase the net spees of searching of terminal, while reducing the function of terminal
Consumption.
It is further preferred that the physical layer carries out cell searching on the specified band information, and handle searches
Cell information reporting described in access layer include: the physical layer on the specified band information from the preferential frequency
Point information starts to search for the synchronization signal of cell, and attempts to receive the necessary system information of the cell；After receiving successfully, institute
It states physical layer and the essential information of the cell is reported the access layer；Wherein, the essential information includes the frequency of the cell
Point, Physical Cell Identifier, cell signal quality and necessary system information；According to the essential information, in the access layer judgement
Whether the cell of report is effective, and parses the necessary system information；When the cell reported is effective, the access layer
The physical layer is notified to continue to the system message of the cell；The physical layer receives the system message of the cell, and
The system information is reported the access layer.
In the above-mentioned technical solutions, a kind of concrete mode for carrying out cell searching is given, using searching neat cell in two steps
Message, when the information obtained according to the first step judges that cell is invalid, it is not necessary to carry out the movement of second step, and enter next
The search of cell can be accelerated to search net spee in this way.
It is further preferred that after access layer described in the information reporting of the described cell searched further include: work as search
To all cells be not Target cell when, it is non-access described in information reporting of the access layer all cells searched
Layer；The Non-Access Stratum selects the cell of the public land mobile network with highest priority in all cells searched
It is resident.
In the above-mentioned technical solutions, when searching for fall short cell, the PLMN cell of suboptimum is selected to be resident, it can be with
The access for guaranteeing terminal, keeps user experience more preferable.
It is further preferred that the physical layer carries out cell searching on the specified band information, and handle searches
Cell information reporting described in access layer further include: the physical layer is scanned on the specified band information, is obtained
The frequency point information covered to strong signal；The physical layer carries out cell searching in the frequency point information that the strong signal covers, and
Access layer described in information reporting the cell searched.
In the above-mentioned technical solutions, in the low-power consumption wide area network such as depth covering scene, such as eMTC, NB-IoT, if
The cell for having searched for all covering grades, it is too long to search network process time-consuming, terminal also suitable power consumption, selects strong signal covering, secondary
Excellent PLMN cell is resident, terminal can be made to restore business as early as possible, user experience is more preferable with the access of increasing terminal.
It is further preferred that the physical layer carries out cell searching on the specified band information, and handle searches
Cell information reporting described in access layer further include: the physical layer is scanned on the specified band information, is obtained
The frequency point information covered to strong signal；The physical layer carries out cell searching in the frequency point information that the strong signal covers, and
Access layer described in information reporting the cell searched；The Non-Access Stratum selects to have most in all cells searched
The cell of the public land mobile network of high priority carry out it is resident after include: when the terminal be in Idle state, and currently
When persistent district is not Target cell, the Non-Access Stratum initiates BUCKET-BASED SEARCHING BACKGROUNDSearch, and the physical layer is in the specified frequency range letter
Cell searching is carried out on breath；Wherein, the priority of the BUCKET-BASED SEARCHING BACKGROUNDSearch is lower than the priority of business；When BUCKET-BASED SEARCHING BACKGROUNDSearch is small to target
The information of the Target cell is notified the Non-Access Stratum by Qu Shi, the access layer；The Non-Access Stratum initiates public land
Mobile network's switching, is switched to the Target cell and is resident.
In the above-mentioned technical solutions, in not traffic affecting, the PLMN cell of BUCKET-BASED SEARCHING BACKGROUNDSearch highest priority, if
It can search out, then carry out PLMN switching, this not only meets protocol requirement, but also does not influence user experience.
The present invention also provides one kind to search net device, comprising: Non-Access Stratum processing module, for will refer to when net is searched in unlatching
Fixed band information, preferential frequency point information and target public land mobile network information notifies the access layer of the terminal；It connects
Enter a layer processing module, for the specified band information, the preferential frequency point information to be notified to the physical layer of the terminal；
Physical channel processing module, for carrying out cell searching on the specified band information, and the information of the cell searched
Report the access layer；The access layer processing module, when described search to cell be Target cell when, the target is small
Non-Access Stratum described in the information reporting in area；Wherein, Target cell is the cell for having target public land mobile network information；It is described
Non-Access Stratum processing module selects the Target cell to be resident.
In the above-mentioned technical solutions, by the way that target PLMN information is notified access layer, so that after searching Target cell
It can be resident immediately, without all cells of removal search, this increase the net spees of searching of terminal, while reducing the function of terminal
Consumption.
It is further preferred that the physical channel processing module, from the preferential frequency on the specified band information
Point information starts to search for the synchronization signal of cell, and attempts to receive the necessary system information of the cell；And when receiving successfully
Afterwards, the essential information of the cell is reported the access layer by the physical layer；Wherein, the essential information includes the cell
Frequency point, Physical Cell Identifier, cell signal quality and necessary system information；The access layer processing module, according to the base
This information judges whether the cell reported is effective, and parses the necessary system information；And it is described small when what is reported
When area is effective, the physical layer is notified to continue to the system message of the cell；The physical channel processing module, described in reception
The system message of cell, and the system information is reported the access layer.
In the above-mentioned technical solutions, a kind of concrete mode for carrying out cell searching is given, using searching neat cell in two steps
Message, when the information obtained according to the first step judges that cell is invalid, it is not necessary to carry out the movement of second step, and enter next
The search of cell can be accelerated to search net spee in this way.
It is further preferred that the access layer processing module, when all cells searched are not Target cells,
Non-Access Stratum described in the information reporting of all cells searched；The Non-Access Stratum processing module, it is all search it is small
There is the cell of the public land mobile network of highest priority to be resident for selection in area.
In the above-mentioned technical solutions, when searching for fall short cell, the PLMN cell of suboptimum is selected to be resident, it can be with
The access for guaranteeing terminal, keeps user experience more preferable.
It is further preferred that the physical channel processing module, is scanned on the specified band information, obtain strong
The frequency point information of signal covering；And in the frequency point information of strong signal covering carry out cell searching, and searching
Access layer described in the information reporting of cell.
In the above-mentioned technical solutions, in the low-power consumption wide area network such as depth covering scene, such as eMTC, NB-IoT, if
The cell for having searched for all covering grades, it is too long to search network process time-consuming, terminal also suitable power consumption, selects strong signal covering, secondary
Excellent PLMN cell is resident, terminal can be made to restore business as early as possible, user experience is more preferable with the access of increasing terminal.
It is further preferred that the physical channel processing module, is scanned on the specified band information, obtain strong
The frequency point information of signal covering；And in the frequency point information of strong signal covering carry out cell searching, and searching
Access layer described in the information reporting of cell；The Non-Access Stratum processing module, when the terminal is in Idle state, and it is current resident
When cell is not Target cell, BUCKET-BASED SEARCHING BACKGROUNDSearch is initiated；Wherein, the priority of the BUCKET-BASED SEARCHING BACKGROUNDSearch is lower than the priority of business；Institute
Physical channel processing module is stated, carries out cell searching on the specified band information；The access layer processing module, works as background
When searching Target cell, the information of the Target cell is notified the Non-Access Stratum；The Non-Access Stratum processing module, hair
Public land mobile network switching is played, the Target cell is switched to and is resident.
In the above-mentioned technical solutions, in not traffic affecting, the PLMN cell of BUCKET-BASED SEARCHING BACKGROUNDSearch highest priority, if
It can search out, then carry out PLMN switching, this not only meets protocol requirement, but also does not influence user experience.
The present invention also provides a kind of terminals, including one kind above-mentioned to search net device.
In the above-mentioned technical solutions, net device is searched by using above-mentioned, accelerates the net spee of searching of terminal, reduces simultaneously
The power consumption of terminal.
A kind of method for searching network, device and the terminal provided through the invention, can bring it is following at least one the utility model has the advantages that
1, the present invention can search net spee with increasing terminal, enable the terminal to quickly access, to reduce power consumption of terminal.
2, the present invention is directed to depth covering scene, and the preferential cell for selecting strong signal covering is resident, accelerates connecing for terminal
Enter, terminal is made to restore business as early as possible, user experience is more preferable；When resident cell is not Target cell, then in Idle state background
The PLMN cell of search highest priority carries out PLMN switching if can search out, this not only meets protocol requirement, but also does not influence
User experience.
Detailed description of the invention
Below by clearly understandable mode, preferred embodiment is described with reference to the drawings, to a kind of method for searching network, device and
Above-mentioned characteristic, technical characteristic, advantage and its implementation of terminal are further described.
Fig. 1 is a kind of flow chart of one embodiment of method for searching network of the invention；
Fig. 2 is a kind of flow chart of another embodiment of method for searching network of the invention；
Fig. 3 is a kind of flow chart of another embodiment of method for searching network of the invention；
Fig. 4 is a kind of flow chart of another embodiment of method for searching network of the invention；
Fig. 5 is a kind of flow chart of another embodiment of method for searching network of the invention；
Fig. 6 is a kind of structural schematic diagram of one embodiment for searching net device of the invention；
Fig. 7 is a kind of structural schematic diagram of one embodiment of terminal of the invention.
Drawing reference numeral explanation:
100. terminal, 110. search net device, 111. Non-Access Stratum processing modules, 112. access layer processing modules, 113. objects
Manage layer processing module.
Specific embodiment
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, Detailed description of the invention will be compareed below
A specific embodiment of the invention.It should be evident that drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing, and obtain other embodiments.
To make simplified form, part related to the present invention is only schematically shown in each figure, they are not represented
Its practical structures as product.In addition, there is identical structure or function in some figures so that simplified form is easy to understand
Component only symbolically depicts one of those, or has only marked one of those.Herein, "one" is not only indicated
" only this ", can also indicate the situation of " more than one ".
In one embodiment of the invention, as shown in Figure 1, a kind of method for searching network, comprising:
Step S100 when net is searched in unlatching, the Non-Access Stratum of terminal by specified band information, preferential frequency point information and
Target public land mobile network information notifies the access layer of the terminal；
Specifically, Non-Access Stratum, that is, NAS layers, access layer, that is, AS layers, target public land mobile network information, that is, target
PLMN information, for identifying target public land mobile network, specific available targets PLMN ID mark.
Target PLMN information is the PLMN information of highest priority, i.e. NAS layers most it is expected resident network.Specified frequency range
Information defines the working frequency range for the network that terminal can be resident；Preferential frequency point information refers to excellent on specified band information
First consider resident frequency point.
Specified band information, preferential frequency point information are notified the physics of the terminal by access layer described in step S200
Layer；
Physical layer described in step S300 carries out cell searching on the specified band information, and the cell searched
Information reporting described in access layer；
Specifically, physical layer carries out cell searching on specified band information, there are many search orders, can be from low frequency
Point can also can also be searched for since preferential frequency point information in turn to high frequency point search.Cell searching refers to that search is small
The synchronization signal in area, and attempt to receive the system message of cell.The information of cell includes the frequency point of cell, physical-layer cell mark
Knowledge, cell signal quality, system message of cell etc..
Step S400 when described search to cell be Target cell when, information of the access layer the Target cell
Report the Non-Access Stratum；Wherein, Target cell is the cell for having target public land mobile network information；
Specifically, Target cell refers to the cell with target PLMN ID, i.e. the PLMN of the highest priority of terminal is small
Area.AS layers parse the system message for the cell that physical layer reports, and obtain PLMN ID belonging to cell.According to the PLMN
ID, AS layers judge whether the cell that physical layer reports is Target cell.When the cell that physical layer reports is Target cell, AS layers
NAS layers of information reporting of the Target cell.
Non-Access Stratum described in step S500 selects the Target cell to be resident.
Specifically, NAS layers AS layers of notice are attempted resident Target cell, the cell is resident in AS layers of notice physical layer trial.Extremely
This, searching net terminates.
Since Target cell is generally in preferential frequency point information, so NAS layers logical through AS layers preferential frequency point information
Know physical layer, facilitates physical layer cell searching since preferential frequency point information, see from the statistical significance, which increase physical layers
The probability for searching Target cell also saves and searches the net time.
The present embodiment is resident immediately when searching out the PLMN cell of highest priority, it is not necessary that all cells are searched for,
To accelerate the resident speed of cell.
In another embodiment of the present invention, as shown in Fig. 2, a kind of method for searching network, comprising:
Step S100 when net is searched in unlatching, the Non-Access Stratum of terminal by specified band information, preferential frequency point information and
Target public land mobile network information notifies the access layer of the terminal；
Specified band information, preferential frequency point information are notified the physics of the terminal by access layer described in step S200
Layer；
Physical layer described in step S301 is searched for since the preferential frequency point information on the specified band information
The synchronization signal of cell, and attempt to receive the necessary system information of the cell；
For step S302 after receiving successfully, the essential information of the cell is reported the access layer by the physical layer；Its
In, the essential information includes frequency point, Physical Cell Identifier, cell signal quality and the necessary system information of the cell；
For step S303 according to the essential information, whether the cell that the access layer judgement reports is effective, and parses
Necessity system information；
For step S304 when the cell reported is effective, it is described small that the access layer notifies that the physical layer continues to
The system message in area；
Physical layer described in step S305 receives the system message of the cell, and the system information is reported the access
Layer；
Specifically, physical layer searches for cell since preferential frequency point information by taking narrowband Internet of things system NBIoT as an example
Synchronization signal, and attempt to receive the necessary system information MIB of cell.If cell signal quality is low or area interference compares
When big, the possible solution of MIB is not come out.If receiving successfully, physical layer is Physical Cell Identifier, the frequency point of cell, cell signal matter
AS layers of the information reportings such as amount, MIB.AS layers, according to the information reported, judge whether cell is effective, for example, whether cell is prohibited
It accesses, whether the signal quality of cell reaches basic resident requirement；AS layers parse mib information, and reception is contained in MIB
Information necessary to SIB.When judging that the cell is effective, AS layers the system message SIB and reception for continuing to cell
Information necessary to SIB notifies physical layer.Physical layer SI reporting B.AS layers of parsing SIB, obtain the PLMN ID of cell.
Step S410 when all cells searched are not Target cells, the access layer it is all search it is small
Non-Access Stratum described in the information reporting in area；
Specifically, the AS layers of information preservation by the cell received is at this when the cell that judgement reports is not Target cell
Ground, notice physical layer search for next cell；Physical layer reports the information of next cell, and whether AS layers judge the cell reported
It is Target cell；So circulation finishes until searching Target cell or physical layer and searching on specified band information.When
When all cells searched are not Target cells, the AS layers of information reporting all cells searched locally saved
NAS layers.
Non-Access Stratum described in step S510 selects the public land with highest priority in all cells searched
The cell of mobile network is resident.
Specifically, NAS layers select the cell of highest priority PLMN to be resident in all cells searched out.Due to searching
Rope to all cells be not Target cell, so the PLMN cell of suboptimum can only be selected to be resident.
The present embodiment, if the not PLMN cell of highest priority, such as user terminal really in current network environment
When in random zone, it is desired nonetheless to search for all cells, select the PLMN cell of suboptimum resident, to guarantee terminal
Normal access.
In another embodiment of the present invention, as shown in figure 3, a kind of method for searching network, comprising:
Step S100 when net is searched in unlatching, the Non-Access Stratum of terminal by specified band information, preferential frequency point information and
Target public land mobile network information notifies the access layer of the terminal；
Specified band information, preferential frequency point information are notified the physics of the terminal by access layer described in step S200
Layer；
Physical layer described in step S310 is scanned on the specified band information, obtains the frequency point of strong signal covering
Information；
Physical layer described in step S311 carries out cell searching in the frequency point information that the strong signal covers, and handle searches
Cell information reporting described in access layer；
Specifically, physical layer quickly scans specified frequency range, the frequency point information that signal quality is greater than pre-determined threshold is obtained,
As the frequency point information of strong signal covering.The cell searched in the frequency point information of strong signal covering, as strong signal
Coverage cell.Physical layer searches for strong signal overlay network, and by the information reporting access layer of the cell searched.
Step S400 when described search to cell be Target cell when, information of the access layer the Target cell
Report the Non-Access Stratum；
Non-Access Stratum described in step S500 selects the Target cell to be resident.
Specifically, the present embodiment is resident immediately when the strong signal coverage cell searched is again just Target cell,
It is not necessary to the strong signal coverage cell that search is all, to accelerate the resident speed of cell.
In another embodiment of the present invention, as shown in figure 4, a kind of method for searching network, comprising:
Step S100 when net is searched in unlatching, the Non-Access Stratum of terminal by specified band information, preferential frequency point information and
Target public land mobile network information notifies the access layer of the terminal；
Specified band information, preferential frequency point information are notified the physics of the terminal by access layer described in step S200
Layer；
Physical layer described in step S310 is scanned on the specified band information, obtains the frequency point of strong signal covering
Information；
Physical layer described in step S312 is opened in the frequency point information that the strong signal covers from the preferential frequency point information
The synchronization signal for the search cell that begins, and attempt to receive the necessary system information of the cell；
For step S313 after receiving successfully, the essential information of the cell is reported the access layer by the physical layer；Its
In, the essential information includes frequency point, Physical Cell Identifier, cell signal quality and the necessary system information of the cell；
For step S314 according to the essential information, whether the cell that the access layer judgement reports is effective, and parses
Necessity system information；
For step S315 when the cell reported is effective, it is described small that the access layer notifies that the physical layer continues to
The system message in area；
Physical layer described in step S316 receives the system message of the cell, and the system information is reported the access
Layer；
Specifically, frequency point information and preferential frequency of the physical layer when searching for strong signal overlay network, from strong signal covering
The intersection of point information starts to search for, and can accelerate to search net spee from the statistical significance.The process and preceding embodiment of cell searching
Description it is identical, no longer repeat.
Step S410 when all cells searched are not Target cells, the access layer it is all search it is small
Non-Access Stratum described in the information reporting in area；
Non-Access Stratum described in step S510 selects the public land with highest priority in all cells searched
The cell of mobile network is resident.
Specifically, when searching for strong signal overlay network, when all cells searched are not Target cells, selection
The PLMN cell of suboptimum is resident.
The present embodiment, it is contemplated that the low-power consumption wide area network such as network of depth covering scene, such as eMTC, NB-IoT,
To search for the cell of all covering grades, it is too long to search network process time-consuming, terminal also suitable power consumption, select strong signal covering,
The PLMN cell of suboptimum is resident, can be with the recovery of increasing terminal business, and user experience is more preferable.
It replaces step S410, step S500 to replace step S510 with step S400, is a deformation of the present embodiment.
In another embodiment of the present invention, as shown in figure 5, a kind of method for searching network, comprising:
Step S100 when net is searched in unlatching, the Non-Access Stratum of terminal by specified band information, preferential frequency point information and
Target public land mobile network information notifies the access layer of the terminal；
Specified band information, preferential frequency point information are notified the physics of the terminal by access layer described in step S200
Layer；
Physical layer described in step S310 is scanned on the specified band information, obtains the frequency point of strong signal covering
Information；
Physical layer described in step S311 carries out cell searching in the frequency point information that the strong signal covers, and handle searches
Cell information reporting described in access layer；
Step S400 when described search to cell be Target cell when, information of the access layer the Target cell
Report the Non-Access Stratum；
Non-Access Stratum described in step S500 selects the Target cell to be resident；
Jump to step S700；
Step S410 when all cells searched are not Target cells, the access layer it is all search it is small
Non-Access Stratum described in the information reporting in area；
Non-Access Stratum described in step S510 selects the public land with highest priority in all cells searched
The cell of mobile network is resident；
Step S600 be in Idle state when the terminal, and when currently persistent district is not Target cell, described non-access
Layer initiates BUCKET-BASED SEARCHING BACKGROUNDSearch, and the physical layer carries out cell searching on the specified band information；Wherein, the BUCKET-BASED SEARCHING BACKGROUNDSearch
Priority is lower than service priority；
Specifically, when there are Target cell, terminal should reside in Target cell according to protocol requirement.So working as industry
Business finishes, and terminal is in Idle state, and when the cell be currently resident of terminal is not Target cell, NAS layers of initiation BUCKET-BASED SEARCHING BACKGROUNDSearch, after
The PLMN cell of continuous search highest priority, i.e. physical layer are completely searched on specified band information, including various
The subzone network of covering grade.BUCKET-BASED SEARCHING BACKGROUNDSearch is meant that priority is lower than the priority of business, and the execution of BUCKET-BASED SEARCHING BACKGROUNDSearch can
To be interrupted at any time by business.
Step S610 is when BUCKET-BASED SEARCHING BACKGROUNDSearch is to Target cell, described in information notice of the access layer the Target cell
Non-Access Stratum；
Non-Access Stratum described in step S620 initiates public land mobile network switching, is switched to the Target cell and is stayed
It stays；
Step S700, which searches net, to be terminated.
Specifically, when searching Target cell during BUCKET-BASED SEARCHING BACKGROUNDSearch, NAS layers of initiation PLMN switching.If do not searched
Rope then switches without PLMN to Target cell.
The present embodiment preferentially selects strong signal for the network of depth covering scene for the recovery of increasing terminal business
Coverage cell is resident, if resident strong signal coverage cell is again simultaneously Target cell, searching net terminates；If resident is strong
Signal coverage cell is not Target cell, then BUCKET-BASED SEARCHING BACKGROUNDSearch is carried out in terminal idle, searches for the PLMN cell of highest priority,
If searching Target cell, PLMN switching is carried out, Target cell is switched to and is resident, not only meet protocol requirement in this way, but also
Do not influence user experience.
In one embodiment of the invention, as shown in fig. 6, one kind searches net device 110, comprising:
Non-Access Stratum processing module 111, for when net is searched in unlatching, by specified band information, preferential frequency point information
The access layer of the terminal is notified with target public land mobile network information；
Specifically, Non-Access Stratum, that is, NAS layers, access layer, that is, AS layers, target public land mobile network information, that is, target
PLMN information, for identifying target public land mobile network, specific available targets PLMN ID mark.
Target PLMN information is the PLMN information of highest priority, i.e. NAS layers most it is expected resident network.Specified frequency range
Information defines the working frequency range for the network that terminal can be resident；Preferential frequency point information refers to excellent on specified band information
First consider resident frequency point.
Access layer processing module 112, for will the specified band information, described in the preferential frequency point information notice
The physical layer of terminal；
Physical channel processing module 113, for carrying out cell searching on the specified band information, and searching
Access layer described in the information reporting of cell；
Specifically, physical layer carries out cell searching on specified band information, there are many search orders, can be from low frequency
Point can also can also be searched for since preferential frequency point information in turn to high frequency point search.Cell searching refers to that search is small
The synchronization signal in area, and attempt to receive the system message of cell.The information of cell includes the frequency point of cell, physical-layer cell mark
Knowledge, cell signal quality, system message of cell etc..
The access layer processing module 112, when described search to cell be Target cell when, the Target cell
Non-Access Stratum described in information reporting；Wherein, Target cell is the cell for having target public land mobile network information；
Specifically, Target cell refers to the cell with target PLMN ID, i.e. the PLMN cell of highest priority.AS layers
The system message for the cell that physical layer reports is parsed, PLMN ID belonging to cell is obtained.According to the PLMN ID, AS layer
Judge whether the cell that physical layer reports is Target cell.When the cell that physical layer reports is Target cell, AS layers the mesh
NAS layers of information reporting for marking cell.
The Non-Access Stratum processing module 111, selects the Target cell to be resident.
Specifically, NAS layers AS layers of notice are attempted resident Target cell, the cell is resident in AS layers of notice physical layer trial.Extremely
This, searching net terminates.
Since Target cell is generally in preferential frequency point information, so NAS layers logical through AS layers preferential frequency point information
Know physical layer, facilitates physical layer cell searching since preferential frequency point information, see from the statistical significance, which increase physical layers
The probability for searching Target cell also saves and searches the net time.
The present embodiment is resident immediately when searching out the PLMN cell of highest priority, it is not necessary that all cells are searched for,
To accelerate the resident speed of cell.
In another embodiment of the present invention, as shown in fig. 6, one kind searches net device 110, comprising:
Non-Access Stratum processing module 111, for when net is searched in unlatching, by specified band information, preferential frequency point information
The access layer of the terminal is notified with target public land mobile network information；
Access layer processing module 112, for will the specified band information, described in the preferential frequency point information notice
The physical layer of terminal；
Physical channel processing module 113 is searched for since the preferential frequency point information on the specified band information
The synchronization signal of cell, and attempt to receive the necessary system information of the cell；And after receiving successfully, the cell
Essential information report the access layer；Wherein, the essential information include the frequency point of the cell, it is Physical Cell Identifier, small
Area's signal quality and necessary system information；
The access layer processing module 112 judges whether the cell reported is effective according to the essential information, and
Parse the necessary system information；And when the cell reported is effective, it is described small to notify that the physical layer continues to
The system message in area；
The physical channel processing module 113, receives the system message of the cell, and the system information is reported described
Access layer；
Specifically, physical layer searches for cell since preferential frequency point information by taking narrowband Internet of things system NBIoT as an example
Synchronization signal, and attempt to receive the necessary system information MIB of cell.If cell signal quality is low or area interference compares
When big, the possible solution of MIB is not come out.If receiving successfully, physical layer is Physical Cell Identifier, the frequency point of cell, cell signal matter
AS layers of the information reportings such as amount, MIB.AS layers, according to the information reported, judge whether cell is effective, for example, whether cell is prohibited
It accesses, whether the signal quality of cell reaches basic resident requirement；AS layers parse mib information, and reception is contained in MIB
Information necessary to SIB.When judging that the cell is effective, AS layers the system message SIB and reception for continuing to cell
Information necessary to SIB notifies physical layer.Physical layer SI reporting B.AS layers of parsing SIB, obtain the PLMN ID of cell.
The access layer processing module 112 is searched when all cells searched are not Target cells all
Cell information reporting described in Non-Access Stratum；
Specifically, the AS layers of information preservation by the cell received is at this when the cell that judgement reports is not Target cell
Ground, notice physical layer search for next cell；Physical layer reports the information of next cell, and whether AS layers judge the cell reported
It is Target cell；So circulation finishes until searching Target cell or physical layer and searching on specified band information.When
When all cells searched are not Target cells, the AS layers of information reporting all cells searched locally saved
NAS layers.
The Non-Access Stratum processing module 111, selection has the public of highest priority in all cells searched
The cell of land mobile network is resident.
Specifically, NAS layers select the cell of highest priority PLMN to be resident in all cells searched out.Due to searching
Rope to all cells be not Target cell, so the PLMN cell of suboptimum can only be selected to be resident.
The present embodiment, if the not PLMN cell of highest priority, such as user terminal really in current network environment
When in random zone, it is desired nonetheless to search for all cells, select the PLMN cell of suboptimum resident, to guarantee terminal
Normal access.
In another embodiment of the present invention, as shown in fig. 6, one kind searches net device 110, comprising:
Non-Access Stratum processing module 111, for when net is searched in unlatching, by specified band information, preferential frequency point information
The access layer of the terminal is notified with target public land mobile network information；
Access layer processing module 112, for will the specified band information, described in the preferential frequency point information notice
The physical layer of terminal；
Physical channel processing module 113 is scanned on the specified band information, obtains the frequency point of strong signal covering
Information；And cell searching is carried out in the frequency point information of strong signal covering, and the information reporting of the cell searched
The access layer；
Specifically, physical layer quickly scans specified frequency range, the frequency point information that signal quality is greater than pre-determined threshold is obtained,
As the frequency point information of strong signal covering.The cell searched in the frequency point information of strong signal covering, as strong signal
Coverage cell.Physical layer searches for strong signal overlay network, and by the information reporting access layer of the cell searched.
The access layer processing module 112, when described search to cell be Target cell when, the Target cell
Non-Access Stratum described in information reporting；Wherein, Target cell is the cell for having target public land mobile network information；
The Non-Access Stratum processing module 111, selects the Target cell to be resident.
Specifically, the present embodiment is resident immediately when the strong signal coverage cell searched is again just Target cell,
It is not necessary to the strong signal coverage cell that search is all, to accelerate the resident speed of cell.
In another embodiment of the present invention, as shown in fig. 6, one kind searches net device 110, comprising:
Non-Access Stratum processing module 111, for when net is searched in unlatching, by specified band information, preferential frequency point information
The access layer of the terminal is notified with target public land mobile network information；
Access layer processing module 112, for will the specified band information, described in the preferential frequency point information notice
The physical layer of terminal；
Physical channel processing module 113 is scanned on the specified band information, obtains the frequency point of strong signal covering
Information；And the synchronization of cell is searched for since the preferential frequency point information in the frequency point information of strong signal covering
Signal, and attempt to receive the necessary system information of the cell；And after receiving successfully, the essential information of the cell
Report the access layer；Wherein, the essential information includes the frequency point, Physical Cell Identifier, cell signal quality of the cell
With necessary system information；
The access layer processing module 112 judges whether the cell reported is effective according to the essential information, and
Parse the necessary system information；And when the cell reported is effective, it is described small to notify that the physical layer continues to
The system message in area；
The physical channel processing module 113, receives the system message of the cell, and the system information is reported described
Access layer；
Specifically, frequency point information and preferential frequency of the physical layer when searching for strong signal overlay network, from strong signal covering
The intersection of point information starts to search for, and can accelerate to search net spee from the statistical significance.The process and preceding embodiment of cell searching
Description it is identical, no longer repeat.
The access layer processing module 112 is searched when all cells searched are not Target cells all
Cell information reporting described in Non-Access Stratum；
The Non-Access Stratum processing module 111, selection has the public of highest priority in all cells searched
The cell of land mobile network is resident.
Specifically, when searching for strong signal overlay network, when all cells searched are not Target cells, selection
The PLMN cell of suboptimum is resident.
The present embodiment, it is contemplated that the low-power consumption wide area network such as network of depth covering scene, such as eMTC, NB-IoT,
To search for the cell of all covering grades, it is too long to search network process time-consuming, terminal also suitable power consumption, select strong signal covering,
The PLMN cell of suboptimum is resident, can be with the recovery of increasing terminal business, and user experience is more preferable.
In another embodiment of the present invention, as shown in fig. 6, one kind searches net device 110, comprising:
Non-Access Stratum processing module 111, for when net is searched in unlatching, by specified band information, preferential frequency point information
The access layer of the terminal is notified with target public land mobile network information；
Access layer processing module 112, for will the specified band information, described in the preferential frequency point information notice
The physical layer of terminal；
Physical channel processing module 113 is scanned on the specified band information, obtains the frequency point of strong signal covering
Information；And cell searching is carried out in the frequency point information of strong signal covering, and the information reporting of the cell searched
The access layer；
The access layer processing module 112, when described search to cell be Target cell when, the Target cell
Non-Access Stratum described in information reporting；
The Non-Access Stratum processing module 111, selects the Target cell to be resident；Searching net terminates；
The access layer processing module 112 is searched when all cells searched are not Target cells all
Cell information reporting described in Non-Access Stratum；
The Non-Access Stratum processing module 111, selection has the public of highest priority in all cells searched
The cell of land mobile network is resident；
The Non-Access Stratum processing module 111, when the terminal is in Idle state, and current persistent district is not that target is small
Qu Shi initiates BUCKET-BASED SEARCHING BACKGROUNDSearch；Wherein, the priority of the BUCKET-BASED SEARCHING BACKGROUNDSearch is lower than the priority of business；
The physical channel processing module 113 carries out cell searching on the specified band information；
Specifically, when there are Target cell, terminal should reside in Target cell according to protocol requirement.So working as industry
Business finishes, and terminal is in Idle state, and when the cell be currently resident of terminal is not Target cell, NAS layers of initiation BUCKET-BASED SEARCHING BACKGROUNDSearch, after
The PLMN cell of continuous search highest priority, i.e. physical layer are completely searched on specified band information, including various
The subzone network of covering grade.BUCKET-BASED SEARCHING BACKGROUNDSearch is meant that priority is lower than the priority of business, and the execution of BUCKET-BASED SEARCHING BACKGROUNDSearch can
To be interrupted at any time by business.
The access layer processing module 112 notifies the information of the Target cell when BUCKET-BASED SEARCHING BACKGROUNDSearch is to Target cell
The Non-Access Stratum；
The Non-Access Stratum processing module 111, initiate public land mobile network switching, be switched to the Target cell into
Row is resident.
Specifically, when searching Target cell during BUCKET-BASED SEARCHING BACKGROUNDSearch, NAS layers of initiation PLMN switching.If do not searched
Rope then switches without PLMN to Target cell.
The present embodiment preferentially selects strong signal for the network of depth covering scene for the recovery of increasing terminal business
Coverage cell is resident, if resident strong signal coverage cell is again simultaneously Target cell, searching net terminates；If resident is strong
Signal coverage cell is not Target cell, then BUCKET-BASED SEARCHING BACKGROUNDSearch is carried out in terminal idle, searches for the PLMN cell of highest priority,
If searching Target cell, PLMN switching is carried out, Target cell is switched to and is resident, not only meet protocol requirement in this way, but also
Do not influence user experience.
In one embodiment of the invention, it as shown in fig. 7, a kind of terminal 100, including is searched described in previous embodiment
Net device 110.
Specifically, when searching net, can accelerate to search network speed using the terminal for searching net device described in previous embodiment
Degree, to save power consumption.
It should be noted that above-described embodiment can be freely combined as needed.The above is only of the invention preferred
Embodiment, it is noted that for those skilled in the art, in the premise for not departing from the principle of the invention
Under, several improvements and modifications can also be made, these modifications and embellishments should also be considered as the scope of protection of the present invention.
Claims (11)
1. a kind of method for searching network characterized by comprising
When net is searched in unlatching, the Non-Access Stratum of terminal is by specified band information, preferential frequency point information and target public land
Mobile network information notifies the access layer of the terminal；
The specified band information, the preferential frequency point information are notified the physical layer of the terminal by the access layer；
The physical layer carries out cell searching on the specified band information, and the information reporting of the cell searched institute
State access layer；
When described search to cell be Target cell when, it is non-described in information reporting of the access layer the Target cell to connect
Enter layer；Wherein, Target cell is the cell for having target public land mobile network information；
The Non-Access Stratum selects the Target cell to be resident.
2. method for searching network according to claim 1, which is characterized in that the physical layer is on the specified band information
Cell searching is carried out, and includes: access layer described in the information reporting of the cell searched
The physical layer searches for the synchronous letter of cell on the specified band information since the preferential frequency point information
Number, and attempt to receive the necessary system information of the cell；
After receiving successfully, the essential information of the cell is reported the access layer by the physical layer；Wherein, the basic letter
Breath includes frequency point, Physical Cell Identifier, cell signal quality and the necessary system information of the cell；
According to the essential information, whether the cell that the access layer judgement reports is effective, and parses the necessary system
Information；
When the cell reported is effective, the system that the access layer notifies the physical layer to continue to the cell disappears
Breath；
The physical layer receives the system message of the cell, and the system information is reported the access layer.
3. method for searching network according to claim 1, which is characterized in that described in the information reporting of the described cell searched
After access layer further include:
When all cells searched are not Target cells, information reporting of the access layer all cells searched
The Non-Access Stratum；
The Non-Access Stratum selects the small of the public land mobile network with highest priority in all cells searched
It is resident in area.
4. method for searching network according to any one of claims 1 to 3, which is characterized in that the physical layer is in the finger
Cell searching is carried out on fixed band information, and access layer described in the information reporting of the cell searched further include:
The physical layer is scanned on the specified band information, obtains the frequency point information of strong signal covering；
The physical layer carries out cell searching in the frequency point information that the strong signal covers, and the information of the cell searched
Report the access layer.
5. method for searching network according to claim 3, it is characterised in that:
The physical layer carries out cell searching on the specified band information, and the information reporting of the cell searched institute
State access layer further include:
The physical layer is scanned on the specified band information, obtains the frequency point information of strong signal covering；
The physical layer carries out cell searching in the frequency point information that the strong signal covers, and the information of the cell searched
Report the access layer；
The Non-Access Stratum selects the small of the public land mobile network with highest priority in all cells searched
Area carries out
When the terminal is in Idle state, and current persistent district is not Target cell, the Non-Access Stratum is initiated background and is searched
Rope, the physical layer carry out cell searching on the specified band information；Wherein, the priority of the BUCKET-BASED SEARCHING BACKGROUNDSearch is lower than
The priority of business；
When BUCKET-BASED SEARCHING BACKGROUNDSearch is to Target cell, the information of the Target cell is notified the Non-Access Stratum by the access layer；
The Non-Access Stratum initiates public land mobile network switching, is switched to the Target cell and is resident.
6. one kind searches net device characterized by comprising
Non-Access Stratum processing module, it is for when net is searched in unlatching, specified band information, preferential frequency point information and target is public
Land mobile network information notifies the access layer of the terminal altogether；
Access layer processing module, for the specified band information, the preferential frequency point information to be notified the terminal
Physical layer；
Physical channel processing module, for carrying out cell searching on the specified band information, and the cell searched
Access layer described in information reporting；
The access layer processing module, when described search to cell be Target cell when, in the information the Target cell
Report the Non-Access Stratum；Wherein, Target cell is the cell for having target public land mobile network information；
The Non-Access Stratum processing module, selects the Target cell to be resident.
7. according to claim 6 search net device, it is characterised in that:
The physical channel processing module searches for cell on the specified band information since the preferential frequency point information
Synchronization signal, and attempt to receive the necessary system information of the cell；And after receiving successfully, the base of the cell
Access layer described in this information reporting；Wherein, the essential information includes frequency point, Physical Cell Identifier, the cell letter of the cell
Number quality and necessary system information；
The access layer processing module judges whether the cell reported is effective according to the essential information, and described in parsing
Necessary system information；And when the cell reported is effective, the system that notifies the physical layer to continue to the cell
Message；
The physical channel processing module receives the system message of the cell, and the system information is reported the access layer.
8. according to claim 6 search net device, it is characterised in that:
The access layer processing module, when all cells searched are not Target cells, all cells searched
Information reporting described in Non-Access Stratum；
The Non-Access Stratum processing module, selection has the public land of highest priority mobile in all cells searched
The cell of network is resident.
9. searching net device according to any one of claim 6~8, it is characterised in that:
The physical channel processing module is scanned on the specified band information, obtains the frequency point letter of strong signal covering
Breath；And cell searching is carried out in the frequency point information of strong signal covering, and the information reporting of the cell searched institute
State access layer.
10. according to claim 8 search net device, it is characterised in that:
The physical channel processing module is scanned on the specified band information, obtains the frequency point letter of strong signal covering
Breath；And cell searching is carried out in the frequency point information of strong signal covering, and the information reporting of the cell searched institute
State access layer；
The Non-Access Stratum processing module, when the terminal is in Idle state, and current persistent district is not Target cell, hair
Play BUCKET-BASED SEARCHING BACKGROUNDSearch；Wherein, the priority of the BUCKET-BASED SEARCHING BACKGROUNDSearch is lower than the priority of business；
The physical channel processing module carries out cell searching on the specified band information；
The access layer processing module notifies the information of the Target cell described non-when BUCKET-BASED SEARCHING BACKGROUNDSearch is to Target cell
Access layer；
The Non-Access Stratum processing module initiates public land mobile network switching, is switched to the Target cell and is resident.
11. a kind of terminal, which is characterized in that the terminal includes searching net dress as described in any one of claim 6 to 10
It sets.
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