CN112804733B - Method and system for improving startup PLMN (public land Mobile network) search efficiency by NBIoT (negative-band interference based on IoT) - Google Patents
Method and system for improving startup PLMN (public land Mobile network) search efficiency by NBIoT (negative-band interference based on IoT) Download PDFInfo
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- CN112804733B CN112804733B CN202110396583.4A CN202110396583A CN112804733B CN 112804733 B CN112804733 B CN 112804733B CN 202110396583 A CN202110396583 A CN 202110396583A CN 112804733 B CN112804733 B CN 112804733B
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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
Abstract
The invention discloses a method and a system for improving startup PLMN (public land Mobile network) search efficiency by NBIoT (negative-base transport network), which are applied to the technical field of communication.A core network device receives a search request sent by user equipment, judges whether the search request is an RPLMN (resilient packet network) search request and simultaneously acquires a PLMN list; reporting the PLMN list to the user equipment; performing PLMN selection according to whether the user equipment stores prior information or not; and finishing cell residence. The invention provides a method and a system for improving the starting PLMN searching efficiency by NBIoT (negative-base transport network interface), which improve the starting network searching speed by reducing unnecessary searching frequency point information, reduce the system information reading of unnecessary cells and accelerate the cell selection speed, thereby improving the starting PLMN searching efficiency.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a method and a system for improving boot PLMN (public land mobile network) search efficiency by NBIoT (negative-band interference based on IoT).
Background
When the Mobile terminal is powered on, it needs to perform Network registration again with PLMN (Public Land Mobile Network), which is a Network established and operated by the government or its approved operator for the purpose of providing Land Mobile communication service to the Public. The Network must be interconnected to the PSTN (Public Switched Telephone Network) to form a regional or national scale communications Network. The PLMN includes MCC (Mobile country Code) and MNC (Mobile Network Code).
In the prior art, when a mobile terminal is initially started up in a roaming place, an RPLMN (Registered PLMN) recorded by the mobile terminal is firstly obtained, the PLMN Registered by the terminal before last shutdown or offline is determined, a network system and a scanning frequency are determined, and then the PLMN of a candidate cell is obtained through network scanning.
In addition, in the process of searching the stored frequency point list, each frequency point is adopted to search one by one, and system information is read, so that the problem of repeated searching occurs because other frequency points are searched and returned to the first frequency point again, and the searching time is wasted.
Therefore, it is an urgent need to solve the problem of the present invention to provide a method and system for improving the search efficiency of the booted PLMN by NBIoT.
Disclosure of Invention
In view of this, the present invention provides a method and a system for improving boot PLMN search efficiency by NBIoT, which improve the boot network search speed by reducing unnecessary frequency point information search, and at the same time reduce system information reading of unnecessary cells, and accelerate the cell selection speed, thereby improving the boot PLMN search efficiency.
In order to achieve the above purpose, the invention provides the following technical scheme:
a method for improving boot PLMN (public land Mobile network) search efficiency by NBIoT (negative-band interference based IoT) specifically comprises the following steps:
the method comprises the steps that core network equipment receives a search request sent by user equipment, judges whether the search request is an RPLMN search request or not, and simultaneously acquires a PLMN list;
reporting the PLMN list to the user equipment;
performing PLMN selection according to whether the user equipment stores prior information or not;
and finishing cell residence.
Preferably, in the method for improving boot PLMN search efficiency by NBIoT, the specific step of determining whether the search request is an RPLMN search request is as follows:
judging whether the search request is an RPLMN search request or not according to the RPLMN indication flag bit carried in the search request; if the RPLMN search is carried out, directly reading the stored frequency point list as a candidate frequency point list; and if the frequency point is not the RPLMN search, starting frequency sweeping to obtain an effective frequency point list.
Preferably, in the method for improving boot PLMN search efficiency by NBIoT, frequency point search is started for an obtained effective frequency point list, and when a frequency point is successfully searched, mib information and sib1 information are directly read, and whether the PLMN read from sib1 information is consistent with RPLMN or not is compared, and if so, the search of the remaining frequency point list is immediately terminated; and if the frequency point lists are inconsistent, searching all the frequency point lists, and reporting the read PLMN lists to an NAS layer of the user equipment.
Preferably, in the above method for improving boot PLMN search efficiency by NBIoT, the specific step of PLMN selection includes:
judging whether the user equipment stores prior information or not;
if no prior information exists, the user equipment performs full-band search, searches the strongest cell on each frequency point and reports the strongest cell to the NAS layer of the user equipment, and the NAS layer determines whether PLMN search is continued;
and if the user equipment stores the prior information, the NAS layer indicates the AS layer to search the PLMN according to the parameters of the prior information and reports the result to the NAS layer.
Preferably, in the method for improving boot PLMN search efficiency by NBIoT, when receiving a PLMN selection request sent by the NAS, first performing consistency check on the PLMN carried in the PLMN selection request message and the PLMN in the searched PLMN list, and determining whether the corresponding frequency point is the frequency point searched for the last time in the PLMN search process, if so, directly reading the sibx corresponding to the frequency point cell without searching the cell again and reading the mib and the sib 1; if the frequency point is not the last searching frequency point, searching the frequency point and reading the information of the mib and the sib 1;
and after the obtaining of the sibx of the cell is finished, finishing the cell residence, and ending the PLMN selection process.
A system for NBIoT to improve booted PLMN search efficiency, comprising:
the receiving module is used for receiving a search request sent by user equipment, judging whether the search request is an RPLMN search request or not and acquiring a PLMN list;
the sending module is used for sending the PLMN list to user equipment;
and the selection module is used for performing PLMN selection according to whether the user equipment stores prior information or not and finishing cell residence.
Preferably, in the above system for improving boot PLMN search efficiency by NBIoT, the receiving module includes: the device comprises a zone bit judging unit, a storage frequency point list reading unit and an effective frequency point list obtaining unit;
the flag bit judging unit judges whether the search request is an RPLMN search request according to an RPLMN indicating flag bit carried in the search request;
the storage point list reading unit reads the storage point list as a candidate point list;
and the effective frequency point list acquisition unit starts frequency sweeping to acquire an effective frequency point list.
Preferably, in the system for improving the search efficiency of the booted PLMN by NBIoT, the system further includes a PLMN list obtaining unit and a consistency determining unit; starting frequency point search for the obtained effective frequency point list, when one frequency point is successfully searched, directly reading the mib information and the sib1 information, comparing whether the PLMN read from the sib1 information is consistent with the RPLMN through a consistency judging unit, and if so, immediately terminating the search of the rest frequency point list; and if the frequency point lists are not consistent, searching all the frequency point lists, and reporting the PLMN list read by the PLMN list acquisition unit to an NAS layer of the user equipment.
Preferably, in the above system for improving boot PLMN search efficiency by NBIoT, the selecting module includes: a priori information judgment unit; the prior information judging unit judges whether the user equipment stores prior information or not;
if no prior information exists, the user equipment performs full-band search, searches the strongest cell on each frequency point and reports the strongest cell to the NAS layer of the user equipment, and the NAS layer determines whether PLMN search is continued;
and if the user equipment stores the prior information, the NAS layer indicates the AS layer to search the PLMN according to the parameters of the prior information and reports the result to the NAS layer.
Preferably, in the above system for improving boot PLMN search efficiency by NBIoT, the method further includes: the last frequency point determining unit receives a PLMN selection request sent by the NAS layer, firstly, the PLMN carried in a PLMN selection request message and the PLMN in a searched PLMN list are subjected to consistency check, the last frequency point determining unit judges whether the corresponding frequency point is the frequency point searched for the last time in the PLMN searching process, if so, the sibx corresponding to the frequency point cell is directly read, and the operations of searching the cell again, reading the mib and the sib1 are not needed; if the frequency point is not the last searching frequency point, searching the frequency point and reading the information of the mib and the sib 1; and after the obtaining of the sibx of the cell is finished, finishing the cell residence, and ending the PLMN selection process.
According to the technical scheme, compared with the prior art, the method and the system for improving the search efficiency of the power-on PLMN by the NBIoT are disclosed, firstly, in the process of searching the list of the storage frequency points, the scheme that each frequency point searches and reads the system information one by one is adopted, the condition that the frequency point search still needs to be carried out when the first frequency point returns to obtain the system information again after searching other frequency points can be avoided, and thus, the time for repeatedly searching the frequency points can be saved. Secondly, in the process of RPLMN searching, if the PLMN carried in the SIB1 information corresponding to the searched frequency point is the RPLMN, the searching of other frequency points is immediately terminated to save time; and finally, after the frequency point list is searched and the acquired PLMN list is reported to the NAS layer, if the frequency point corresponding to the PLMN selected by the NAS layer is the frequency point searched for the last time in the searching process, the operations of searching the frequency point again, reading the mib and reading the sib1 are not needed, and other system information is directly read, so that the time for searching the frequency point and reading the mib and the sib1 is saved.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a flow chart of the process of the present invention;
FIG. 2 is a diagram illustrating a PLMN search flow according to the present invention;
FIG. 3 is a diagram illustrating a PLMN selection flow according to the present invention;
fig. 4 is a block diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a method for improving the search efficiency of a boot PLMN by NBIoT, which comprises the following specific steps as shown in figure 1:
the core network equipment receives a search request sent by user equipment, judges whether the search request is an RPLMN search request or not, and simultaneously acquires a PLMN list;
reporting the PLMN list to user equipment;
performing PLMN selection according to whether the user equipment stores prior information or not;
and finishing cell residence.
In order to further optimize the above technical solution, as shown in fig. 2, the specific steps of determining whether the search request is an RPLMN search request are as follows:
judging whether the search request is an RPLMN search request or not according to the RPLMN indication flag bit carried in the search request; if the RPLMN search is carried out, directly reading the stored frequency point list as a candidate frequency point list; and if the frequency point is not the RPLMN search, starting frequency sweeping to obtain an effective frequency point list.
Further, frequency point searching is started for the obtained effective frequency point list, when one frequency point is successfully searched, mib information and sib1 information of the effective frequency point list are directly read, whether the PLMN read from the sib1 information is consistent with the RPLMN or not is compared, and if the PLMN is consistent with the RPLMN, the rest frequency point list searching is immediately stopped; and if the frequency point lists are inconsistent, searching all the frequency point lists, and reporting the read PLMN lists to an NAS layer of the user equipment.
In order to further optimize the above technical solution, as shown in fig. 3, the specific steps of PLMN selection include:
judging whether the user equipment stores prior information or not;
if no prior information exists, the user equipment performs full-band search, searches the strongest cell on each frequency point and reports the strongest cell to the NAS layer of the user equipment, and the NAS layer determines whether PLMN search is continued;
if the user equipment stores prior information, the NAS layer indicates the AS layer to search the PLMN according to the parameters of the prior information, and reports the result to the NAS layer.
Further, receiving a PLMN selection request sent by the NAS, firstly, carrying out consistency check on the PLMN carried in the PLMN selection request message and the PLMN in the searched PLMN list, judging whether the corresponding frequency point is the frequency point searched for the last time in the PLMN searching process, if so, directly reading the sibx corresponding to the frequency point cell, and needing not to search the cell again and read the mib and the sib 1; if the frequency point is not the last searching frequency point, searching the frequency point and reading the information of the mib and the sib 1;
and after the obtaining of the sibx of the cell is finished, finishing the cell residence, and ending the PLMN selection process.
The embodiment of the invention discloses a system for improving the search efficiency of a boot PLMN by NBIoT, which is shown in figure 4 and comprises the following components:
the receiving module is used for receiving a search request sent by user equipment, judging whether the search request is an RPLMN search request or not and acquiring a PLMN list;
the sending module sends the PLMN list to the user equipment;
and the selection module is used for performing PLMN selection according to whether the user equipment stores prior information or not and finishing cell residence.
In order to further optimize the above technical solution, the receiving module includes: the device comprises a zone bit judging unit, a storage frequency point list reading unit and an effective frequency point list obtaining unit;
the flag bit judging unit judges whether the search request is an RPLMN search request or not according to the RPLMN indicating flag bit carried in the search request;
the storage point list reading unit reads the storage frequency point list as a candidate frequency point list;
and the effective frequency point list acquisition unit starts frequency sweeping to acquire an effective frequency point list.
In order to further optimize the technical scheme, the system also comprises a PLMN list acquisition unit and a consistency judgment unit;
starting frequency point search for the obtained effective frequency point list, when one frequency point is successfully searched, directly reading the mib information and the sib1 information, comparing whether the PLMN read from the sib1 information is consistent with the RPLMN through a consistency judging unit, and if so, immediately terminating the search of the rest frequency point list; and if the frequency point lists are not consistent, searching all the frequency point lists, and reporting the PLMN lists read by the PLMN list acquisition unit to an NAS layer of the user equipment.
In order to further optimize the above technical solution, the selection module includes: a priori information judgment unit;
the prior information judging unit judges whether the user equipment stores prior information or not;
if no prior information exists, the user equipment performs full-band search, searches the strongest cell on each frequency point and reports the strongest cell to the NAS layer of the user equipment, and the NAS layer determines whether PLMN search is continued;
if the user equipment stores prior information, the NAS layer indicates the AS layer to search the PLMN according to the parameters of the prior information, and reports the result to the NAS layer.
In order to further optimize the above technical solution, the method further comprises: a last frequency point determining unit;
receiving a PLMN selection request sent by an NAS layer, firstly, carrying out consistency check on a PLMN carried in a PLMN selection request message and a PLMN in a searched PLMN list, judging whether a frequency point corresponding to the frequency point is the frequency point searched for the last time in the PLMN searching process by a last frequency point determining unit, if so, directly reading a sibx corresponding to a frequency point cell without searching the cell again and reading a mib and a sib 1; if the frequency point is not the last searching frequency point, searching the frequency point and reading the information of the mib and the sib 1; and after the obtaining of the sibx of the cell is finished, finishing the cell residence, and ending the PLMN selection process.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A method for improving boot PLMN (public land mobile network) search efficiency by NBIoT (negative-band interference based IoT) is characterized by comprising the following specific steps:
the method comprises the steps that core network equipment receives a search request sent by user equipment, judges whether the search request is an RPLMN search request or not, and simultaneously acquires a PLMN list;
the specific steps for judging whether the search request is an RPLMN search request are as follows:
judging whether the search request is an RPLMN search request or not according to the RPLMN indication flag bit carried in the search request; if the RPLMN search is carried out, directly reading the stored frequency point list as a candidate frequency point list; if not, starting frequency sweeping to obtain an effective frequency point list;
reporting the PLMN list to the user equipment;
performing PLMN selection according to whether the user equipment stores prior information or not;
and finishing cell residence.
2. The method for improving the search efficiency of the booted PLMN by NBIoT according to claim 1, wherein for the obtained effective frequency point list, the frequency point search is started, when one frequency point is successfully searched, the mib information and the sib1 information are directly read, and whether the PLMN read from the sib1 information is consistent with the RPLMN or not is compared, if so, the rest frequency point list search is immediately terminated; and if the frequency point lists are inconsistent, searching all the frequency point lists, and reporting the read PLMN lists to an NAS layer of the user equipment.
3. The method of claim 1, wherein the NBIoT method for improving boot PLMN search efficiency comprises the following specific steps:
judging whether the user equipment stores prior information or not;
if no prior information exists, the user equipment performs full-band search, searches the strongest cell on each frequency point and reports the strongest cell to the NAS layer of the user equipment, and the NAS layer determines whether PLMN search is continued;
and if the user equipment stores the prior information, the NAS layer indicates the AS layer to search the PLMN according to the parameters of the prior information and reports the result to the NAS layer.
4. The method for improving the search efficiency of the booted PLMN by NBIoT of claim 3, wherein the method comprises the steps of receiving a PLMN selection request sent by the NAS, firstly, performing consistency check on the PLMN carried in the PLMN selection request message and the PLMN in the searched PLMN list, and determining whether the corresponding frequency point is the frequency point searched for the last time in the PLMN search process, if so, directly reading the sibx corresponding to the frequency point cell without searching the cell again, and reading the mib and the sib 1; if the frequency point is not the last searching frequency point, searching the frequency point and reading the information of the mib and the sib 1;
and after the obtaining of the sibx of the cell is finished, finishing the cell residence, and ending the PLMN selection process.
5. A system for improving boot PLMN search efficiency by NBIoT, comprising:
the receiving module is used for receiving a search request sent by user equipment, judging whether the search request is an RPLMN search request or not and acquiring a PLMN list;
the receiving module includes: the device comprises a zone bit judging unit, a storage frequency point list reading unit and an effective frequency point list obtaining unit;
the flag bit judging unit judges whether the search request is an RPLMN search request according to an RPLMN indicating flag bit carried in the search request;
the storage frequency point list reading unit reads the storage frequency point list as a candidate frequency point list;
the effective frequency point list acquisition unit starts frequency sweeping to acquire an effective frequency point list;
the sending module is used for sending the PLMN list to user equipment;
and the selection module is used for performing PLMN selection according to whether the user equipment stores prior information or not and finishing cell residence.
6. The system of claim 5, further comprising a PLMN list acquisition unit and a consistency determination unit; starting frequency point search for the obtained effective frequency point list, when one frequency point is successfully searched, directly reading the mib information and the sib1 information, comparing whether the PLMN read from the sib1 information is consistent with the RPLMN through a consistency judging unit, and if so, immediately terminating the search of the rest frequency point list; and if the frequency point lists are not consistent, searching all the frequency point lists, and reporting the PLMN list read by the PLMN list acquisition unit to an NAS layer of the user equipment.
7. The system of claim 5, wherein the NBIoT module comprises: a priori information judgment unit; the prior information judging unit judges whether the user equipment stores prior information or not;
if no prior information exists, the user equipment performs full-band search, searches the strongest cell on each frequency point and reports the strongest cell to the NAS layer of the user equipment, and the NAS layer determines whether PLMN search is continued;
and if the user equipment stores the prior information, the NAS layer indicates the AS layer to search the PLMN according to the parameters of the prior information and reports the result to the NAS layer.
8. The system of claim 7, wherein the NBIoT system for improving boot PLMN search efficiency further comprises: the last frequency point determining unit receives a PLMN selection request sent by the NAS layer, firstly, the PLMN carried in a PLMN selection request message and the PLMN in a searched PLMN list are subjected to consistency check, the last frequency point determining unit judges whether the corresponding frequency point is the frequency point searched for the last time in the PLMN searching process, if so, the sibx corresponding to the frequency point cell is directly read, and the operations of searching the cell again, reading the mib and the sib1 are not needed; if the frequency point is not the last searching frequency point, searching the frequency point and reading the information of the mib and the sib 1; and after the obtaining of the sibx of the cell is finished, finishing the cell residence, and ending the PLMN selection process.
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| CN107911812B (en) * | 2017-11-14 | 2021-11-16 | 维沃移动通信有限公司 | Method for adjusting preferred public land mobile network PPLMN list and mobile terminal |
| CN108966260B (en) * | 2018-07-31 | 2022-03-25 | Oppo广东移动通信有限公司 | Data updating method and device and terminal equipment |
| EP3755061A1 (en) * | 2019-06-18 | 2020-12-23 | Gemalto Sa | Method for updating a terminal comprising a secure element |
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