CN113382448B - Adjacent cell selection method under shared network, terminal equipment and communication system - Google Patents

Adjacent cell selection method under shared network, terminal equipment and communication system Download PDF

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CN113382448B
CN113382448B CN202110674535.7A CN202110674535A CN113382448B CN 113382448 B CN113382448 B CN 113382448B CN 202110674535 A CN202110674535 A CN 202110674535A CN 113382448 B CN113382448 B CN 113382448B
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cell
plmn
list
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measurement
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CN113382448A (en
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唐晨
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Spreadtrum Communications Shanghai Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/04—Reselecting a cell layer in multi-layered cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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Abstract

A method, terminal equipment and system for selecting adjacent cells under a shared network are provided, the method comprises: measuring adjacent regions; evaluating whether the adjacent cell meets reselection conditions or measurement event reporting conditions according to the measurement result; if yes, determining whether the adjacent cell has a PLMN matched with the PLMN selected by the current resident cell; if yes, the target cell reselection is initiated or the measurement event of the neighboring cell is reported. By using the invention, the terminal user experience and the flexibility of different operator frequency point configurations under a shared network can be improved.

Description

Adjacent cell selection method under shared network, terminal equipment and communication system
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method for selecting a neighboring cell in a shared network, a terminal device, and a communication system.
Background
The network sharing means that the same base station cell can be shared and used by different operators, the network sharing allows different core networks to be connected to the same access network, and different operators share base stations and spectrum resources, so that the utilization rate of network resources can be improved, and the operators are helped to save network deployment cost. With 5G large-scale networking, more and more operators adopt the technology. By adopting the Network deployment mode, a plurality of PLMNs (Public Land Mobile networks) of different operators are configured in a system message issued by a base station, one or more TAC (Tracking Area codes) are configured to correspond to the PLMNs, and a terminal selects a desired PLMN for access when residing in a Network.
In the prior art, some operators do not configure all frequency points for sharing, but only share cells of a part of frequency bands, for example, a certain cell X is a shared cell of operators a and B (PLMN where a and B are configured in a system message at the same time), and the cell is configured with neighboring cell relationships Y and Z at the same time, but Y and Z are not shared cells (Y and Z may be inter-frequency cells of the same RAT (Radio Access Technology, Radio Access Technology), or cells of other RATs), where Y is a non-shared cell belonging to the operator a, and Z is a non-shared cell belonging to the operator B. When the UE inserted with the card of operator a resides in cell X and performs neighbor cell measurement, cells Y and Z are measured simultaneously. Supposing that a Z cell measured by UE meets a measurement report condition (a connection state) or a reselection condition (an idle state), when the UE reports the connection state to a network side, the network side may issue redirection information of a frequency point where the Z cell is located, and when the UE initiates redirection of the frequency point where the Z cell is located according to a network instruction, the UE finds that the found Z cell cannot reside (a PLMN does not meet the residence condition), so that redirection failure can be caused; or the UE finds that the detected Z cell meets the reselection condition in the idle UE, and when the Z cell reselection is initiated, finds that the Z cell fails to reselect because the PLMN does not meet the camping condition.
For the above problems, in the prior art, a network end is usually required to be a shared cell only for a cell corresponding to a neighboring cell relationship configured on the shared cell, such a requirement may greatly limit network deployment of a shared base station, and sometimes even if the requirement is made, a mismatching situation may exist in an actual scene, thereby causing poor experience for a terminal user.
Disclosure of Invention
The embodiment of the application provides a neighbor cell selection method, terminal equipment and a communication system under a shared network, so as to improve the terminal user experience and the flexibility of frequency point configuration of different operators under the shared network.
Therefore, the embodiment of the invention provides the following technical scheme: carrying out neighbor cell measurement; evaluating whether the adjacent cell meets reselection conditions or measurement event reporting conditions according to the measurement result; if yes, determining whether the adjacent cell has a PLMN matched with the PLMN selected by the current resident cell; and if so, initiating target cell reselection or reporting the measurement event of the neighboring cell.
Optionally, the determining whether the neighboring cell has a PLMN matched with a PLMN selected by the currently camped cell includes: checking whether the recorded neighbor cell exists or not and a PLMN list of the neighbor cell; if yes, determining whether the neighbor cell has a PLMN matched with the PLMN selected by the current resident cell according to the recorded PLMN list of the neighbor cell; and if not, reading the system message of the neighboring cell, and determining whether the neighboring cell has a PLMN (public land Mobile network) matched with the PLMN selected by the current resident cell according to the system message of the neighboring cell.
Optionally, the checking whether there is a recorded PLMN list of the neighboring cell includes: and checking whether the recorded historical cell list has the adjacent cell and a PLMN list of the adjacent cell.
Optionally, the cells recorded in the history cell list include: and reading the system message and acquiring the cell of the PLMN information in the cell which is resided in history, the network searching process or the cell reselection process.
Optionally, the history cell list includes the following information: cell PCI, frequency point, PLMN list, RAT.
Optionally, the method further includes: and maintaining the historical cell list in a first-in first-out mode.
Optionally, the method further includes: receiving a measurement message issued by a network side, wherein the measurement message comprises a measurement list, the measurement list comprises indication information used for indicating each cell list under the current frequency point, and the position of each cell list corresponds to the position of a PLMN list in a system message one by one; receiving a system message issued by a network side, wherein the system message comprises a PLMN list; determining the PLMN of each cell under the frequency point according to the PLMN list in the system message and the indication information in the measurement message, and recording the PLMN of each cell into network configuration information;
the checking whether the recorded neighbor cell exists or not and the PLMN list of the neighbor cell include:
and checking whether the network configuration information contains the neighbor cells and a PLMN list of the neighbor cells.
Optionally, the indication information is:
the number of the cell lists corresponds to the number of the PLMN lists configured in the system message one by one; or
A single cell list and a bitmap field in a cell of the cell list indicating which PLMN in the PLMN list configured in the system message the cell corresponds to.
Optionally, the determining, according to the system message of the neighboring cell, whether the neighboring cell has a PLMN that matches a PLMN selected by a currently camped cell includes:
and judging whether a PLMN (public land Mobile network) matched with the PLMN of the current resident cell exists in the PLMN list of the system message of the adjacent cell.
A terminal device, the terminal device comprising: the device comprises a measuring module, an evaluation module, a neighbor cell checking module, a reselection module or a reporting module;
the measurement module is used for measuring the adjacent regions;
the evaluation module is used for evaluating whether the adjacent cell meets reselection conditions or measurement event reporting conditions according to the measurement result;
the neighbor cell checking module is configured to determine whether the neighbor cell has a PLMN that is matched with a PLMN selected by a currently camped cell when the evaluation module evaluates that the neighbor cell satisfies a reselection condition or a measurement event reporting condition; if yes, triggering the reselection module to initiate target cell reselection, or triggering the reporting module to report the measurement event of the neighboring cell.
Optionally, the neighbor cell checking module includes:
a recording information checking module, configured to check whether there are recorded neighboring cells and a PLMN list of the neighboring cells; if yes, determining whether the neighbor cell has a PLMN which is matched with the PLMN selected by the current resident cell according to the recorded PLMN list of the neighbor cell; if yes, triggering the reselection module to initiate target cell reselection, or triggering the reporting module to report the measurement event of the neighboring cell; a neighbor cell system message checking module, configured to read a system message of a neighbor cell when the recorded information checking module checks that the neighbor cell is not recorded, or the neighbor cell does not have a PLMN list, or the neighbor cell does not have a PLMN matched with a PLMN selected by a currently camped cell, and determine whether the neighbor cell has a PLMN matched with the PLMN selected by the currently camped cell according to the system message of the neighbor cell; if yes, triggering the reselection module to initiate target cell reselection, or triggering the reporting module to report the measurement event of the neighboring cell.
Optionally, the terminal device further includes: the historical information recording module is used for recording a historical cell list; the record information checking module checks whether the neighbor cell exists in a history cell list recorded by the history information recording module and a PLMN list of the neighbor cell.
Optionally, the cells recorded in the history cell list include: and reading the system message and acquiring the cell of the PLMN information in the cell which is resided in history, the network searching process or the cell reselection process.
Optionally, the history cell list includes the following information: cell PCI, frequency point, PLMN list, RAT.
Optionally, the history information recording module is further configured to maintain the history cell list in a first-in first-out manner.
Optionally, the terminal device further includes: a message receiving module, configured to receive a measurement message and a system message sent by a network side, where the measurement message includes a measurement list, the measurement list includes indication information used to indicate each cell list at a current frequency point, and the positions of each cell list correspond to the positions of a PLMN list in the system message one to one; the system message comprises a PLMN list; a configuration information recording module, configured to determine the PLMN of each cell under the frequency point according to the PLMN list in the system message and the indication information in the measurement message, and record the PLMN of each cell in network configuration information; the recorded information checking module is specifically configured to check whether the neighboring cell and the PLMN list of the neighboring cell exist in the network configuration information.
Optionally, the indication information is: the number of the cell lists corresponds to the number of the PLMN lists configured in the system message one by one; or a single cell list and the cells of the cell list have a bitmap field in them to indicate which PLMN in the PLMN list configured in the system message the cell corresponds to.
Optionally, the neighboring cell system message checking module determines whether a PLMN matched with a PLMN of a currently camped cell exists in a PLMN list of the system message of the neighboring cell.
A communication system includes a terminal device and a network device; the terminal device includes: the device comprises a message receiving module, a configuration information recording module, a measuring module, an evaluation module, a neighbor cell checking module, a reselection module or a reporting module;
the network device is used for issuing a measurement message and a system message to the terminal device, wherein the measurement message comprises a measurement list, the measurement list comprises indication information used for indicating each cell list under the current frequency point, and the positions of each cell list correspond to the positions of a PLMN list in the system message one by one; the system message includes a PLMN list
The message receiving module is used for receiving the measurement message and the system message;
the configuration information recording module is used for determining the PLMN of each cell under the frequency point according to the PLMN list in the system message and the indication information in the measurement message, and recording the PLMN of each cell into network configuration information;
the measurement module is used for measuring the adjacent regions;
the evaluation module is used for evaluating whether the adjacent cell meets reselection conditions or measurement event reporting conditions according to the measurement result;
the neighbor cell checking module comprises a recording information checking module and a neighbor cell system message checking module;
the recording information checking module is configured to check whether the neighboring cell is in a neighboring cell list configured by a network when the evaluation module evaluates that the neighboring cell satisfies a reselection condition or a measurement event reporting condition; if yes, checking whether the network configuration information has the PLMN of the neighboring cell; if yes, checking whether the adjacent cell has a PLMN matched with the PLMN selected by the current resident cell; if yes, triggering the reselection module to initiate target cell reselection, or triggering the reporting module to report the measurement event of the neighboring cell;
the neighbor cell system message checking module is configured to, when the recorded information checking module checks that the network configuration information does not include the neighbor cell, or does not include the PLMN of the neighbor cell, or does not include the PLMN matched with the PLMN selected by the currently camped cell, read the system message of the neighbor cell, and determine whether the neighbor cell has the PLMN matched with the PLMN selected by the currently camped cell according to the system message of the neighbor cell; if yes, triggering the reselection module to initiate target cell reselection, or triggering the reporting module to report the measurement event of the neighboring cell.
Optionally, the network device is a base station.
An embodiment of the present invention further provides a computer-readable storage medium, which is a non-volatile storage medium or a non-transitory storage medium, and on which a computer program is stored, where the computer program is executed by a processor to perform the steps of the above method.
In order to solve the above technical problem, an embodiment of the present invention further provides an electronic device, which includes a memory and a processor, where the memory stores a computer program executable on the processor, and the processor executes the steps of the method when executing the computer program.
In the method for selecting a neighboring cell under a shared network, the terminal device, and the communication system provided in the embodiments of the present invention, when a current resident cell of the terminal is a shared cell, the terminal performs neighboring cell measurement, and when a measured neighboring cell satisfies a reselection condition or a measurement event report condition, instead of directly initiating reselection or performing measurement event report, it is determined whether the neighboring cell has a PLMN that matches a PLMN selected by the current resident cell; if yes, re-selecting or reporting a measurement event; otherwise, reselection is not initiated in the idle state, and the measurement event is not reported in the connection state, so that the terminal reselection or redirection failure caused by the fact that the PLMN does not conform to the residence condition is effectively avoided, and the terminal user experience is improved; and the limitation on the network distribution of the shared base station is reduced, and the flexibility of frequency point configuration is improved.
Further, on one hand, the terminal may determine whether there are the neighboring cells and the PLMN list of the neighboring cells according to the recorded information, where the recorded information may be a historical cell list recorded by the terminal according to information such as a cell in which the terminal has resided in history, a cell search process or a cell reselection process, where the terminal has read a system message and obtained PLMN information, or may be network configuration information recorded by the terminal according to a measurement list issued by the network side and the PLMN list in the system message; on the other hand, whether a PLMN matched with the PLMN of the currently camped cell exists can also be determined according to the PLMN list of the neighbor cell system message by reading the system message of the neighbor cell. Various effective solutions are provided for solving the problems in the prior art.
Drawings
Fig. 1 is a flowchart of a method for selecting a neighboring cell in a shared network according to an embodiment of the present invention;
fig. 2 is a flowchart of a specific implementation of a method for selecting a neighboring cell in a shared network according to an embodiment of the present invention;
fig. 3 is a flowchart of another specific implementation of a method for selecting a neighboring cell in a shared network according to an embodiment of the present invention;
fig. 4 is a block diagram of a terminal device according to an embodiment of the present invention;
fig. 5 is another structural block diagram of the terminal device according to the embodiment of the present invention;
fig. 6 is another structural block diagram of the terminal device according to the embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Aiming at the influence of cell reselection or redirection of a terminal under the condition that non-all frequency bands are shared in a shared operator in the prior art, embodiments of the present invention provide a method, a terminal device, and a system for selecting a neighboring cell under a shared network, where when a current resident cell is a shared cell, a measured neighboring cell meets a reselection condition or a measurement event condition, instead of directly initiating reselection or reporting a measurement event of the neighboring cell to a network side, it is determined first whether the neighboring cell has a PLMN that matches the PLMN selected by the current resident cell, if so, reselection is initiated or the measurement event of the neighboring cell is reported to the network side, otherwise, reselection (idle state) is not initiated, and a measurement event report (connection state) is not performed.
It should be noted that, if the cell where the terminal currently resides is the non-shared cell, because the aforementioned problem in the prior art does not exist, in this case, it is not necessary to determine whether the neighboring cell has a PLMN that matches the PLMN selected by the currently residing cell, but directly initiate reselection or perform measurement event reporting.
A system message SIB in a 5G NR (New Radio, New air interface) network is basically the same as an SIB in an LTE (Long Term Evolution) network, except that a transmission period is different; in addition, there are two types of SIB messages in 5G NR, one is periodic broadcast, and the other is transmitted according to a terminal request. In both LTE and 5G NR, if more than one PLMN is configured in the system message of the cell where the terminal currently camps on, the cell may be considered as a shared cell, for example, multiple PLMNs are configured in SIB1, and according to the configuration information, the terminal may determine whether the currently camping cell is a shared cell.
For convenience of description, in the following embodiments, the cell where the terminal currently resides is an application environment of a shared cell, and initiating or not initiating reselection refers to a behavior of the terminal in an idle state, and reporting a measurement event or not reporting a measurement event refers to a behavior of the terminal in a connection state, which will not be described in detail in the following description of the embodiments one by one.
As shown in fig. 1, it is a flowchart of a method for selecting a neighboring cell in a shared network according to an embodiment of the present invention, and the method includes the following steps:
step 101, performing neighbor measurement.
Step 102, evaluating whether the neighboring cell meets reselection conditions or measurement event reporting conditions according to the measurement result; if yes, go to step 103; otherwise, step 105 is performed.
103, determining whether the neighboring cell has a PLMN matched with the PLMN selected by the current camped cell; if yes, go to step 104; otherwise, step 105 is performed.
It should be noted that, in the embodiment of the present invention, the reselection condition and the measurement event reporting event are the same as those in the prior art, which will be briefly described below.
In the prior art, when a terminal is in an idle state, a network side configures corresponding signal thresholds of a serving cell and an adjacent cell for the terminal, and when a value of a corresponding signal of the adjacent cell measured by the terminal meets a corresponding threshold condition, the terminal considers that a reselection condition is met, and at this time, the terminal initiates reselection. When the terminal is in a connection state, the network side configures a measurement event for the terminal, where the event includes a signal threshold of a serving cell and a signal threshold of an adjacent cell, and when the terminal measures that the signal strength of the serving cell and the signal strength of the adjacent cell respectively satisfy the corresponding thresholds, it is considered that a measurement reporting condition (e.g., event A3/a4/a5/B1/B2, etc.) is satisfied, and at this time, the terminal reports a corresponding measurement report to the network side. Correspondingly, after the terminal reports the measurement report, the network side generally selects a cell frequency point with the strongest signal according to the measurement result reported by the terminal to send a redirection message to the terminal or send a handover message to a target cell to the terminal, and instructs the terminal to reselect the cell for residence according to the frequency point indicated in the message.
Different from the prior art, in the scheme of the embodiment of the present invention, when the measured neighboring cell meets the reselection condition or the measurement event reporting condition, the terminal does not directly initiate reselection or report the measurement event, but first determines whether the current resident cell is a shared cell. Specifically, the terminal may determine whether the currently camped cell is the shared cell according to the received System message SIB1(System Information Block Type1, System message Block Type 1).
Determining whether the neighboring cell has a PLMN that matches the PLMN selected by the currently camped cell, where the matched PLMN is the same as the PLMN selected by the currently camped cell or is in an EPLMN (Equivalent PLMN) list issued by the current Network. The EPLMN, namely the peer-to-peer public land mobile network, is a PLMN which is in the same position as the PLMN currently selected by the terminal, and the priority of the PLMN is the same.
Specifically, whether there is a recorded PLMN list of the neighboring cell may be checked first; and if so, determining whether the adjacent cell has a PLMN matched with the PLMN selected by the current resident cell according to the recorded PLMN list of the adjacent cell.
And under the condition that the PLMN list of the adjacent cell is not recorded or the PLMN list of the adjacent cell is recorded, but the PLMN of the adjacent cell which is matched with the PLMN selected by the current resident cell is determined according to the recorded PLMN list of the adjacent cell, the system message of the adjacent cell can be further read, and whether the PLMN which is matched with the PLMN selected by the current resident cell exists in the adjacent cell is determined according to the system message of the adjacent cell.
Step 104, initiating target cell reselection (idle state) or reporting the measurement event (connection state) of the neighboring cell.
And 105, not initiating target cell reselection (idle state) and not reporting the measurement event (connection state) of the neighboring cell.
In the method for selecting a neighboring cell in a shared network provided by the embodiment of the present invention, when a current resident cell of a terminal is a shared cell, the terminal performs neighboring cell measurement, and when a measured neighboring cell meets a reselection condition or a measurement event report condition, instead of directly initiating reselection or performing measurement event report, it is determined whether the neighboring cell has a PLMN that matches a PLMN selected by the current resident cell; if yes, re-selecting or reporting a measurement event; otherwise, reselection is not initiated in the idle state, and the measurement event is not reported in the connection state, so that the terminal reselection or redirection failure caused by the fact that the PLMN does not conform to the residence condition is effectively avoided, and the terminal user experience is improved; and the limitation on the network distribution of the shared base station is reduced, and the flexibility of frequency point configuration is improved.
It should be noted that, the PLMN list of the neighboring cell recorded in the step 102 may be a historical cell list recorded by the terminal, or may be a PLMN of each cell configured by the network recorded by the terminal, that is, the PLMN of each cell is issued to the terminal in the configuration message by the network side. These two modes will be described in detail below.
As shown in fig. 2, it is a flowchart of a specific implementation of the method for selecting a neighboring cell in a shared network according to an embodiment of the present invention.
In this embodiment, the terminal maintains a list of historical cells, where the recorded cells may include, but are not limited to: the cell where the PLMN information is acquired by reading a system message (for example, SIB1 under LTE) in the cell where the PLMN information resides in history, the network search process, or the cell reselection process.
Table 1: historical cell list
Figure GDA0003730780780000101
It should be noted that, when the cell list is full, the terminal may maintain the history cell list in a first-in first-out manner. Of course, other maintenance manners may also be adopted, for example, a manner of randomly selecting one piece of cell information for replacement, or replacing the last piece of cell information, and the like, which is not limited in this embodiment of the present invention.
Referring to fig. 2, this embodiment includes the steps of:
step 201, performing neighbor measurement.
Step 202, evaluating whether the neighboring cell meets a reselection condition or a measurement event reporting condition according to the measurement result; if yes, go to step 203; otherwise, step 209 is performed.
Step 203, searching whether the neighboring cell and a PLMN list of the neighboring cell exist in a history cell list; if yes, executing step 204; otherwise, step 206 is performed.
Step 204, judging whether a PLMN which is matched with a PLMN selected by a current resident cell exists in the PLMN list of the neighboring cell; if so, go to step 205; otherwise, step 206 is performed.
Step 205, initiate target cell reselection (idle state) or report measurement event (connection state) of the neighboring cell.
Step 206, reading the system message of the neighboring cell, such as SIB 1.
Generally, a terminal has only one rf module, and only a single rf module can be used to measure, transmit and receive data. Therefore, the terminal can easily measure the adjacent cell signals with the same frequency, and simultaneously receive and send data in the serving cell; while communication (TX/RX) with the serving cell must be suspended for measurements on different frequencies (inter-frequency neighbors) and other systems (other wireless networks), the radio module needs to be adjusted to configure the frequency and resume the connection with the serving cell after a while. The time interval during which the terminal suspends communication with the serving cell to measure the inter-frequency neighbor or other wireless neighbors is called a measurement GAP (measgap).
If the system message of the adjacent cell is read in a connected state, and the network is not configured with a measurement GAP (GAP), the terminal is required to punch and read the system message.
The puncturing reading refers to that the terminal autonomously uses a segment of gap to read the system message of the neighboring cell, and the embodiment of the invention is not limited specifically to how to read the system message.
Step 207, judging whether reading the system message of the neighboring cell is successful; if so, go to step 208; otherwise, step 209 is performed.
Step 208, judging whether a PLMN matched with the PLMN selected by the currently camped cell exists in the PLMN list in the system message of the neighboring cell; if yes, go to step 205; otherwise, step 209 is performed.
Step 209, discard the neighboring cell (without initiating target cell reselection or reporting the measurement event of the neighboring cell).
In the method for selecting a neighboring cell in a shared network provided in this embodiment, before a measured neighboring cell needs to be reported to the network or reselection is initiated, a terminal determines, based on history information or system information of the neighboring cell read in advance, whether a PLMN that matches a PLMN selected when the cell resides currently is present in a PLMN list of the neighboring cell, and if so, initiates target cell reselection (idle state) or reports a measurement event (connection state) of the neighboring cell, otherwise does not initiate target cell reselection or does not report the measurement event of the neighboring cell, that is, only reports the measurement event to the neighboring cell having the matching PLMN or initiates target cell reselection. Further, the terminal may also determine whether the neighboring cell has a PLMN matching the current camped cell by reading a system message of the neighboring cell.
As shown in fig. 3, it is a flowchart of another specific implementation of the method for selecting a neighboring cell in a shared network according to the embodiment of the present invention.
In this embodiment, it is necessary to add cell list information under the frequency point in an existing co-frequency, inter-frequency, or inter-system measurement frequency point structure configured by a network (if a cell list is not defined for the message structure in the original protocol), or to expand the cell list into multiple cell lists (in the case that the original protocol has been defined but only one cell list is provided), for example, the number of the expanded cell lists is consistent with the number of PLMN list elements in the system message SIB1, and the cell lists are in one-to-one correspondence.
Taking the inter-frequency measurement system message (SIB5) under LTE as an example, the current protocol configuration structure of the message is that only one cell list is located under one frequency point, the modified inter-frequency measurement system message is expanded to the maximum number of elements of the PLMN list in the system message SIB1 under one frequency point, and the location of each cell list corresponds to the location of the PLMN list in the system message (SIB1) one to one, for example, the cells in the cell list 1 indicate PLMNs that all belong to the PLMN list 1 (for shared cells, there may be multiple lists).
The current protocol structure is as follows:
Figure GDA0003730780780000121
the modifications are as follows:
Figure GDA0003730780780000122
wherein the bold face part is the content of the modification made to the existing protocol.
This is of course only one of the presentation schemes.
Another representation scheme may, for example, keep the number of cell lists in the current measurement frequency point unchanged (still one), but add a Bitmap field to each cell in the cell list to indicate which PLMN in the PLMN list configured in the system message (SIB1) it belongs to. For example, if the PLMN of a certain neighboring cell belongs to PLMN1 and PLMN3 in the PLMN list in the system message, the Bitmap field of the cell in the cell list configured by the measurement is set to 000101(1 indicates belonging, and 0 indicates not belonging).
Certainly, the two representation manners are only an example, and the practical application includes, but is not limited to, the two indication manners, and the overall idea is to increase the indication through the network terminal so that the terminal can identify which PLMN the currently measured neighboring cell belongs to.
For the LTE common-frequency measurement system message (SIB4), the same idea can be adopted, where the current common-frequency cell list is expanded to be consistent with the number of PLMN list elements in the system message SIB1, and the location of each cell list corresponds to the location of the PLMN list in the system message (SIB1) one to one.
Similarly, for a 5G system, NR co-channel measurement system message (SIB3) can be modified, and a current co-channel cell list is expanded into at most maxPLMN (12) cell lists, wherein the position of each cell list corresponds to the position of a PLMN list in the system message (SIB 1); the NR pilot frequency measurement system message (SIB4) may be modified to expand a cell list corresponding to each pilot frequency bin to a cell list corresponding to at most maxPLMN (12), where the location of each cell list corresponds to the location of the PLMN list in the system message (SIB 1).
Referring to fig. 3, this embodiment includes the steps of:
step 301, receiving a measurement message and a system message issued by a network side, wherein the measurement message comprises a measurement list; the system message includes a PLMN list. The measurement list comprises indication information used for indicating each cell list under the current frequency point, and the positions of each cell list correspond to the positions of the PLMN lists in the system message one by one.
It should be noted that, the embodiment of the present invention does not limit the receiving order of the system message and the measurement message, and the issuing timing of each message is determined by the network side.
Step 302, determining the PLMN of each cell under the frequency point according to the PLMN list in the system message and the indication information in the measurement message, and recording the PLMN of each cell into network configuration information.
And step 303, performing neighbor measurement.
Step 304, evaluating whether the neighboring cell meets reselection conditions or measurement event reporting conditions according to the measurement result; if so, go to step 305; otherwise, step 311 is performed.
Step 305, checking whether the network configuration information includes the neighboring cell and a PLMN list of the neighboring cell; if so, go to step 306; otherwise, step 308 is performed.
Step 306, checking whether a PLMN matched with the PLMN selected by the currently camped cell exists in the PLMN list of the neighboring cell; if so, go to step 307; otherwise, step 308 is performed.
Step 307, initiating target cell reselection (idle state) or reporting a measurement event (connection state) of the neighboring cell.
Step 308, reading the system message of the neighboring cell, such as SIB 1.
Step 309, judging whether reading the system message of the neighboring cell is successful; if so, go to step 310; otherwise, step 311 is performed.
Step 310, judging whether a PLMN which is matched with a PLMN selected by a currently camped cell exists in a PLMN list in the system message of the neighboring cell; if yes, go to step 307; otherwise, step 311 is performed.
Step 311, discarding the neighboring cell (not initiating target cell reselection or not reporting the measurement event of the neighboring cell).
In the method for selecting neighboring cells under a shared network provided in this embodiment, the network side adds, to the cell list configured for measurement, indication information used for indicating each cell list at the current frequency point, and accordingly, the terminal determines, according to the measurement list information in the measurement message and the PLMN list in the system message, the PLMN of each cell at each frequency point, and records the PLMN in the network configuration information. And before the measured adjacent cells need to be reported to the network or initiate reselection, the terminal checks whether the network configuration information contains the adjacent cells and a PLMN list of the adjacent cells. If yes, further judging whether a PLMN which is matched with the PLMN selected by the current resident cell exists in the PLMN list of the neighboring cell; if so, initiating target cell reselection (idle state) or reporting the measurement event (connection state) of the neighboring cell, otherwise, not initiating target cell reselection or not reporting the measurement event of the neighboring cell, that is, only reporting the measurement event of the neighboring cell matched with the PLMN selected by the current resident cell or initiating target cell reselection. Further, the terminal may also determine whether the neighboring cell has a PLMN matching the currently camped cell by reading a system message of the neighboring cell.
Correspondingly, an embodiment of the present invention further provides a terminal device, which is a structural block diagram of the terminal device, as shown in fig. 4.
In this embodiment, the terminal device includes: a measurement module 41, an evaluation module 42, a neighbor cell check module 43, a reselection module 44, or a reporting module 45. Wherein:
the measurement module 41 is configured to perform neighbor measurement;
the evaluation module 42 is configured to evaluate whether the neighboring cell meets a reselection condition or a measurement event reporting condition according to the measurement result;
the neighboring cell checking module 43 is configured to determine whether the neighboring cell has a PLMN that is matched with a PLMN selected by a currently camped cell when the evaluation module 42 evaluates that the neighboring cell satisfies a reselection condition or a measurement event reporting condition; if yes, triggering the reselection module 44 to initiate target cell reselection, or triggering the reporting module 45 to report the measurement event of the neighboring cell.
In some specific embodiments, as shown in fig. 5 and fig. 6, the neighbor cell inspection module includes: the logging information checking module 431 may further include a neighbor system message checking module 432. Wherein:
a record information checking module 431, configured to check whether there are the recorded neighboring cells and the PLMN list of the neighboring cells; if yes, determining whether the neighbor cell has a PLMN matched with the PLMN selected by the current resident cell according to the recorded PLMN list of the neighbor cell; if yes, triggering the reselection module 44 to initiate target cell reselection, or triggering the reporting module 45 to report the measurement event of the neighboring cell;
a neighbor cell system message checking module 432, configured to, in a case that the record information checking module 431 checks that the neighbor cell that is not recorded, or the neighbor cell does not have a PLMN list, or the neighbor cell does not have a PLMN that matches a PLMN selected by the current camped cell, read a system message of the neighbor cell, and determine whether the neighbor cell has a PLMN that matches the PLMN selected by the current camped cell according to the system message of the neighbor cell; if yes, triggering the reselection module 44 to initiate target cell reselection, or triggering the reporting module 45 to report the measurement event of the neighboring cell.
The terminal device provided by the embodiment of the present invention performs neighbor cell measurement when the current camped cell is the shared cell, and determines whether the neighbor cell has a PLMN that matches the PLMN selected by the current camped cell, instead of directly initiating reselection or performing measurement event report when the measured neighbor cell satisfies the reselection condition or the measurement event report condition; if yes, re-selecting or reporting a measurement event; otherwise, reselection is not initiated in the idle state, and the measurement event is not reported in the connection state, so that the terminal reselection or redirection failure caused by the fact that the PLMN does not conform to the resident condition is effectively avoided, and the terminal user experience is improved; and the limitation on the network deployment of the shared base station is reduced, and the flexibility of frequency point configuration is improved.
Fig. 5 is a block diagram of another embodiment of the terminal device of the present invention.
In this embodiment, the terminal device further includes: and a history information recording module 51, configured to record a history cell list.
The cells recorded in the history cell list include: and reading the system message and acquiring the cell of the PLMN information in the cell which is resided in history, the network searching process or the cell reselection process. The history cell list may specifically include, but is not limited to, the following information: the PCI, frequency point, PLMN list, RAT, for example, may also include information such as cell identifier.
Further, the history information recording module 51 is further configured to maintain the history cell list in a first-in first-out manner. Of course, the history information recording module 51 may also adopt other maintenance manners, for example, randomly selecting one piece of cell information to replace, or replacing the last piece of cell information, and the like, which is not limited in this embodiment of the present invention.
Accordingly, in this embodiment, the recorded information checking module 431 checks whether there is the neighboring cell in the history cell list recorded by the history information recording module 51 and whether there is a PLMN list in the neighboring cell list, and if there is the PLMN list in the neighboring cell list, determines whether there is a PLMN in the neighboring cell that matches the PLMN selected by the currently camped cell according to the recorded PLMN list of the neighboring cell.
Correspondingly, in this embodiment, the neighbor cell system message checking module 432 is configured to, in a case that the record information checking module 431 checks that the neighbor cell that is not recorded, or the neighbor cell does not have a PLMN list, or the neighbor cell does not have a PLMN that matches a PLMN selected by a currently camped cell, read the system message of the neighbor cell, and determine whether the neighbor cell has a PLMN that matches the PLMN selected by the currently camped cell according to the system message of the neighbor cell; if yes, triggering the reselection module 44 to initiate target cell reselection, or triggering the reporting module 45 to report the measurement event of the neighboring cell.
The terminal device provided in this embodiment, before the measured neighboring cell needs to report to the network or initiate reselection, determines whether a PLMN in the PLMN list of the neighboring cell matches the PLMN selected when the cell resides in the current cell based on history information or reading system information of the neighboring cell in advance, and if so, initiates target cell reselection (idle state) or reports a measurement event (connection state) of the neighboring cell, otherwise does not initiate target cell reselection or does not report the measurement event of the neighboring cell, that is, only reports the measurement event to the neighboring cell having the matching PLMN or initiates target cell reselection. Further, the terminal device may also determine whether the neighboring cell has a PLMN matching the currently camped cell by reading a system message of the neighboring cell.
Fig. 6 is a block diagram of another embodiment of the terminal device of the present invention.
In this embodiment, the terminal device further includes: a message receiving module 61 and a configuration information recording module 62. Wherein:
the message receiving module 61 is configured to receive a measurement message and a system message sent by a network side, where the measurement message includes a measurement list, the measurement list includes indication information used for indicating each cell list under a current frequency point, and the positions of each cell list correspond to the positions of a PLMN list in the system message one to one; the system message comprises a PLMN list;
the configuration information recording module 62 is configured to determine the PLMN of each cell under the frequency point according to the PLMN list in the system message and the indication information in the measurement message, and record the PLMN of each cell in the network configuration information.
It should be noted that the measurement list is included in measurement system messages (including common-frequency measurement system messages, pilot-frequency measurement system messages, and inter-system measurement system messages) issued by the network side, and for the LTE system and the NR system, the network side needs to add the measurement list in the corresponding existing measurement system messages, and the form of the measurement list may adopt multiple modes and provide corresponding indication information, for example, the indication information may be: the number of the cell lists corresponds to the number of the PLMN lists configured in the system message one by one; or a single cell list, and a cell of the cell list has a bitmap field for indicating which PLMN in the PLMN list configured in the system message the cell corresponds to, which has been described in detail in the foregoing description of the embodiment of the method of the present invention shown in fig. 3, and is not described again here.
Accordingly, in this embodiment, the record information checking module 431 is specifically configured to check whether the network configuration information includes the neighboring cell and the PLMN list of the neighboring cell. If yes, determining whether the neighbor cell has a PLMN which is matched with the PLMN selected by the current resident cell according to the recorded PLMN list of the neighbor cell; if yes, triggering the reselection module 44 to initiate target cell reselection, or triggering the reporting module 45 to report the measurement event of the neighboring cell.
Correspondingly, in this embodiment, the neighbor cell system message checking module 432 is configured to, in a case that the record information checking module 431 checks that the neighbor cell that is not recorded, or the neighbor cell does not have a PLMN list, or the neighbor cell does not have a PLMN that matches a PLMN selected by a currently camped cell, read the system message of the neighbor cell, and determine whether the neighbor cell has a PLMN that matches the PLMN selected by the currently camped cell according to the system message of the neighbor cell; if yes, triggering the reselection module 44 to initiate target cell reselection, or triggering the reporting module 45 to report the measurement event of the neighboring cell.
The terminal device provided in this embodiment determines the PLMN of each cell at each frequency point according to the measurement list information in the measurement message and the PLMN list in the system message, and records the PLMN in the network configuration information. Before the measured adjacent cells need to be reported to the network or initiate reselection, whether the adjacent cells and a PLMN list of the adjacent cells exist in the network configuration information is checked. If yes, further judging whether a PLMN which is matched with the PLMN selected by the current resident cell exists in the PLMN list of the neighboring cell; if so, initiating target cell reselection (idle state) or reporting the measurement event (connection state) of the neighboring cell, otherwise, not initiating target cell reselection or not reporting the measurement event of the neighboring cell, that is, only reporting the measurement event of the neighboring cell matched with the PLMN selected by the current resident cell or initiating target cell reselection. Further, the terminal device may also determine whether the neighboring cell has a PLMN matching the currently camped cell by reading a system message of the neighboring cell.
Correspondingly, an embodiment of the present invention further provides a communication system, including the terminal device and the network device shown in fig. 6.
The network equipment is used for issuing a system message and a measurement message to the terminal equipment, wherein the measurement message comprises a measurement list, the measurement list comprises indication information used for indicating each cell list under the current frequency point, and the positions of each cell list correspond to the positions of a PLMN list in the system message one by one; the system message includes a PLMN list.
The terminal equipment receives the system message and the measurement message, determines the PLMN of each cell under the frequency point according to a PLMN list in the system message and the indication information in the measurement message, and records the PLMN of each cell into network configuration information; under the conditions that the neighbor cell measurement is carried out and the neighbor cell meets the reselection condition or the measurement event reporting condition is evaluated according to the measurement result, whether the neighbor cell and the PLMN of the neighbor cell exist in the network configuration information is checked; if yes, checking whether the PLMN of the neighboring cell has a PLMN matched with the PLMN selected by the current resident cell; if yes, triggering the reselection module to initiate target cell reselection, or triggering the reporting module to report the measurement event of the neighboring cell; reading system information of the neighboring cell under the condition that the network configuration information does not have the neighboring cell, or does not have a PLMN list of the neighboring cell, or does not have a PLMN matched with a PLMN selected by a current resident cell in the PLMN list of the neighboring cell, and determining whether the neighboring cell has a PLMN matched with the PLMN selected by the current resident cell according to the system information of the neighboring cell; if yes, triggering the reselection module to initiate target cell reselection, or triggering the reporting module to report the measurement event of the neighboring cell.
The network device is a base station, such as eNB in LTE, and gNB in NR.
In the communication system provided by the embodiment of the present invention, the network device adds the indication information for indicating each cell list under the current frequency point in the cell list configured by measurement, and accordingly, the terminal device determines the PLMN of each cell under each frequency point according to the measurement list information in the measurement message and the PLMN list in the system message, and records the PLMN in the network configuration information. Before the measured adjacent cells need to be reported to the network or initiate reselection, the terminal device checks whether the network configuration information contains the adjacent cells and a PLMN list of the adjacent cells. If yes, further judging whether a PLMN which is matched with the PLMN selected by the current resident cell exists in the PLMN list of the neighboring cell; if so, initiating target cell reselection (idle state) or reporting the measurement event (connection state) of the neighboring cell, otherwise, not initiating target cell reselection or not reporting the measurement event of the neighboring cell, that is, only reporting the measurement event of the neighboring cell matched with the PLMN selected by the current resident cell or initiating target cell reselection. Further, the terminal device may also determine whether the neighboring cell has a PLMN matching the currently camped cell by reading a system message of the neighboring cell.
By using the schemes of the embodiments provided by the invention, the network deployment of the communication network can be more flexible, the network deployment limit of the shared cell is reduced, and the user experience is improved without obviously increasing the terminal burden.
In a specific implementation, each module/unit included in each apparatus and product described in the foregoing embodiments may be a software module/unit, may also be a hardware module/unit, or may also be a part of a software module/unit and a part of a hardware module/unit.
For example, for each device or product applied to or integrated into a chip, each module/unit included in the device or product may be implemented by hardware such as a circuit, or at least a part of the module/unit may be implemented by a software program running on a processor integrated within the chip, and the rest (if any) part of the module/unit may be implemented by hardware such as a circuit; for each device or product applied to or integrated with the chip module, each module/unit included in the device or product may be implemented by using hardware such as a circuit, and different modules/units may be located in the same component (e.g., a chip, a circuit module, etc.) or different components of the chip module, or at least some of the modules/units may be implemented by using a software program running on a processor integrated within the chip module, and the rest (if any) of the modules/units may be implemented by using hardware such as a circuit; for each device and product applied to or integrated in the terminal, each module/unit included in the device and product may be implemented by hardware such as a circuit, different modules/units may be located in the same component (e.g., a chip, a circuit module, etc.) or different components in the terminal, or at least part of the modules/units may be implemented by a software program running on a processor integrated in the terminal, and the rest (if any) part of the modules/units may be implemented by hardware such as a circuit.
Embodiments of the present invention further provide a computer-readable storage medium, which is a non-volatile storage medium or a non-transitory storage medium, and has a computer program stored thereon, where the computer program is executed by a processor to perform the steps of the method provided in the embodiment corresponding to fig. 1, fig. 2, or fig. 3. Alternatively, the computer program is executed by a processor to perform the steps of the method provided by the corresponding embodiment of fig. 1.
The embodiment of the present invention further provides another neighboring cell selection apparatus under a shared network, which includes a memory and a processor, where the memory stores a computer program that can be run on the processor, and the processor executes the steps of the method provided in the embodiment corresponding to fig. 1, fig. 2, or fig. 3 when running the computer program.
The embodiment of the present invention further provides an electronic device, which includes a memory and a processor, where the memory stores a computer program executable on the processor, and the processor executes the steps of the method provided in the embodiment corresponding to fig. 1, fig. 2, or fig. 3 when executing the computer program.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (20)

1. A method for selecting a neighboring cell under a shared network is characterized in that the method comprises the following steps:
carrying out neighbor cell measurement;
evaluating whether the adjacent cell meets reselection conditions or measurement event reporting conditions according to the measurement result;
if yes, determining whether the adjacent cell has a PLMN matched with the PLMN selected by the current resident cell;
if yes, initiating target cell reselection or reporting the measurement event of the neighboring cell;
wherein the determining whether the neighboring cell has a PLMN that matches a PLMN selected by the currently camped cell includes:
checking whether the recorded neighbor cells exist or not and checking a PLMN list of the neighbor cells;
if yes, determining whether the neighbor cell has a PLMN matched with the PLMN selected by the current resident cell according to the recorded PLMN list of the neighbor cell;
and if not, reading the system message of the neighboring cell, and determining whether the neighboring cell has a PLMN (public land Mobile network) matched with the PLMN selected by the current resident cell according to the system message of the neighboring cell.
2. The method of claim 1, wherein the checking whether there is a recorded PLMN list for the neighboring cell comprises:
and checking whether the recorded historical cell list has the adjacent cell and a PLMN list of the adjacent cell.
3. The method of claim 2, wherein the cells recorded in the history cell list comprise: and reading the system message and acquiring the cell of the PLMN information in the cell which is resided in history, the network searching process or the cell reselection process.
4. The method of claim 2, wherein the historical cell list comprises the following information: cell PCI, frequency point, PLMN list, RAT.
5. The method of claim 2, further comprising:
and maintaining the historical cell list in a first-in first-out mode.
6. The method of claim 1, further comprising:
receiving a measurement message issued by a network side, wherein the measurement message comprises a measurement list, the measurement list comprises indication information used for indicating each cell list under a current frequency point, and the position of each cell list corresponds to the position of a PLMN list in a system message one by one;
receiving a system message issued by a network side, wherein the system message comprises a PLMN list;
determining the PLMN of each cell under the frequency point according to the PLMN list in the system message and the indication information in the measurement message, and recording the PLMN of each cell into network configuration information;
the checking whether the recorded neighbor cell exists or not and the PLMN list of the neighbor cell include:
and checking whether the network configuration information contains the adjacent cell and a PLMN list of the adjacent cell.
7. The method of claim 6, wherein the indication information is:
the number of the cell lists corresponds to the number of the PLMN lists configured in the system message one by one; or
A single cell list and a bitmap field in a cell of the cell list indicating which PLMN in the PLMN list configured in the system message the cell corresponds to.
8. The method according to any of claims 1 to 7, wherein the determining whether the neighboring cell has a PLMN matching a PLMN selected by a currently camped cell according to the system message of the neighboring cell comprises:
and judging whether a PLMN (public land Mobile network) matched with the PLMN of the current resident cell exists in the PLMN list of the system message of the neighboring cell.
9. A terminal device, the terminal device comprising: the device comprises a measuring module, an evaluation module, a neighbor cell checking module, a reselection module or a reporting module;
the measuring module is used for measuring adjacent cells;
the evaluation module is used for evaluating whether the adjacent cell meets reselection conditions or measurement event reporting conditions according to the measurement result;
the neighbor cell checking module is configured to determine whether the neighbor cell has a PLMN that is matched with a PLMN selected by a currently camped cell when the evaluation module evaluates that the neighbor cell satisfies a reselection condition or a measurement event reporting condition; if yes, triggering the reselection module to initiate target cell reselection, or triggering the reporting module to report the measurement event of the neighboring cell;
wherein, the neighborhood checking module comprises:
a recording information checking module, configured to check whether there are recorded neighboring cells and a PLMN list of the neighboring cells; if yes, determining whether the neighbor cell has a PLMN matched with the PLMN selected by the current resident cell according to the recorded PLMN list of the neighbor cell; if yes, triggering the reselection module to initiate target cell reselection, or triggering the reporting module to report the measurement event of the neighboring cell;
a neighbor cell system message checking module, configured to read a system message of a neighbor cell when the recorded information checking module checks that the neighbor cell is not recorded, or the neighbor cell does not have a PLMN list, or the neighbor cell does not have a PLMN matched with a PLMN selected by a currently camped cell, and determine whether the neighbor cell has a PLMN matched with the PLMN selected by the currently camped cell according to the system message of the neighbor cell; if yes, triggering the reselection module to initiate target cell reselection, or triggering the reporting module to report the measurement event of the neighboring cell.
10. The terminal device according to claim 9, wherein the terminal device further comprises:
the historical information recording module is used for recording a historical cell list;
the record information checking module checks whether the neighbor cell exists in a history cell list recorded by the history information recording module and a PLMN list of the neighbor cell.
11. The terminal device according to claim 10, wherein the cells recorded in the history cell list comprise: and reading the system message and acquiring the cell of the PLMN information in the cell which is resided in history, the network searching process or the cell reselection process.
12. The terminal device of claim 10, wherein the historical cell list comprises the following information: cell PCI, frequency point, PLMN list, RAT.
13. The terminal device of claim 10,
the history information recording module is further configured to maintain the history cell list in a first-in first-out manner.
14. The terminal device according to claim 9, wherein the terminal device further comprises:
a message receiving module, configured to receive a measurement message and a system message sent by a network side, where the measurement message includes a measurement list, the measurement list includes indication information used for indicating each cell list at a current frequency point, and the positions of each cell list correspond to the positions of a PLMN list in the system message one to one; the system message comprises a PLMN list;
a configuration information recording module, configured to determine the PLMN of each cell under the frequency point according to the PLMN list in the system message and the indication information in the measurement message, and record the PLMN of each cell in network configuration information;
the recorded information checking module is specifically configured to check whether the neighboring cell and the PLMN list of the neighboring cell exist in the network configuration information.
15. The terminal device of claim 14, wherein the indication information is:
the number of the cell lists corresponds to the number of the PLMN lists configured in the system message one by one; or alternatively
A single cell list and a bitmap field in a cell of the cell list indicating which PLMN in the PLMN list configured in the system message the cell corresponds to.
16. The terminal device according to any of claims 9 to 15,
and the neighbor cell system message checking module judges whether a PLMN (public land mobile network) matched with the PLMN of the current resident cell exists in a PLMN list of the system message of the neighbor cell.
17. A communication system comprising a terminal device and a network device; the terminal device includes: the device comprises a message receiving module, a configuration information recording module, a measuring module, an evaluation module, a neighbor cell checking module, a reselection module or a reporting module;
the network device is used for issuing a measurement message and a system message to the terminal device, wherein the measurement message comprises a measurement list, the measurement list comprises indication information used for indicating each cell list under the current frequency point, and the positions of each cell list correspond to the positions of a PLMN list in the system message one by one; the system message comprises a PLMN list;
the message receiving module is used for receiving the measurement message and the system message;
the configuration information recording module is used for determining the PLMN of each cell under the frequency point according to the PLMN list in the system message and the indication information in the measurement message, and recording the PLMN of each cell into network configuration information;
the measurement module is used for measuring the adjacent regions;
the evaluation module is used for evaluating whether the adjacent cell meets reselection conditions or measurement event reporting conditions according to the measurement result;
the neighbor cell checking module comprises a recording information checking module and a neighbor cell system message checking module;
the recording information checking module is configured to check whether the neighboring cell is in a neighboring cell list configured by a network when the evaluation module evaluates that the neighboring cell satisfies a reselection condition or a measurement event reporting condition; if yes, checking whether the network configuration information has the PLMN of the neighboring cell; if yes, checking whether the adjacent cell has a PLMN matched with the PLMN selected by the current resident cell; if yes, triggering the reselection module to initiate target cell reselection, or triggering the reporting module to report the measurement event of the neighboring cell;
the neighbor cell system message checking module is configured to, when the recorded information checking module checks that the network configuration information does not include the neighbor cell, or does not include the PLMN of the neighbor cell, or does not include the PLMN matched with the PLMN selected by the currently camped cell, read the system message of the neighbor cell, and determine whether the neighbor cell has the PLMN matched with the PLMN selected by the currently camped cell according to the system message of the neighbor cell; if yes, triggering the reselection module to initiate target cell reselection, or triggering the reporting module to report the measurement event of the neighboring cell.
18. The communication system of claim 17, wherein the network device is a base station.
19. A computer-readable storage medium, being a non-volatile storage medium or a non-transitory storage medium, having a computer program stored thereon, the computer program, when being executed by a processor, performing the steps of the method according to any of the claims 1 to 8.
20. An electronic device comprising a memory and a processor, the memory having stored thereon a computer program being executable on the processor, wherein the processor, when executing the computer program, performs the steps of the method of any of claims 1 to 8.
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