Communication method and system, terminal and computer readable medium

Abstract

The invention provides a communication method and system, a terminal and a computer readable medium, and belongs to the technical field of communication, and the method comprises the steps: receiving frequency points issued by a network side, and dividing the frequency points into a first type of frequency points and a second type of frequency points; initiating measurement according to the first type of frequency points and the second type of frequency points to obtain measurement results, and reporting the measurement results of the first type of frequency points meeting a preset threshold; when the measurement result of the second type of frequency points meets a preset threshold, pre-reading the first system information block; and when the first system information block indicates that the residence condition of the terminal with reduced capability is satisfied, reporting the measurement result of the second type of frequency points. The method has the beneficial effects that the first system information block is pre-read from the second type of frequency point measurement cells meeting the preset threshold, and the cells meeting the residence condition are measured and reported, so that the cells which are reselected, switched and redirected all meet the residence condition of the terminal with reduced capability, and the reconstruction process caused by the fact that the network is not upgraded is reduced.

Description

Technical Field

[0001] The present invention relates to the field of communication technologies, and in particular to a communication method, system, terminal, and computer-readable medium. Background Art

[0002] In today's mobile communications landscape, 5G terminals based on the 3GPP mobile communications standard are developing rapidly. Among them, 5G NR Redcap (Reduced Capability) terminals, as a type of 5G terminal, cannot access 5G NR non-Redcap cells according to protocol specifications. However, since the coverage of 5G NR Redcap cells is often low, such terminals face the potential risk of not being able to provide normal services due to being out of coverage.

[0003] Currently, 5G NR Redcap terminals directly report measurements based on the measurement results as required by the protocol. However, in practice, due to the presence of unupgraded R17 base stations, particularly in areas with poor Redcap distribution or where the network has not been upgraded, 5G NR Redcap terminals directly report measurements as required by the protocol. This can lead to reselection, switching, or redirection to cells that do not meet the Redcap terminal's residency requirements. This forces the corresponding terminal to maintain connection only through reestablishment, leading to a series of issues such as data interruption, which seriously affects the user experience and network stability. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a communication method; in a second aspect, it also provides a communication system; in a third aspect, it also provides a terminal; in a fourth aspect, it also provides a computer-readable medium.

[0005] The technical problem solved by the present invention can be achieved by adopting the following technical solutions:

[0006] A first aspect of the present invention is to provide a communication method, applied to a target terminal, where the target terminal is a reduced-capability terminal, the method comprising:

[0007] Step S1: receiving frequency points sent by the network side, and classifying the frequency points to divide the frequency points into first-category frequency points and second-category frequency points;

[0008] Step S2: Initiate measurement based on the first-category frequency points and the second-category frequency points, obtain measurement results, and report the measurement results of the first-category frequency points that meet a preset threshold;

[0009] Step S3: When the measurement result of the second-category frequency point meets the preset threshold, pre-reading a first system information block, where the first system information block is used to indicate whether the cell of the second-category frequency point meets the residency condition of the reduced-capability terminal;

[0010] Step S4: When the first system information block indicates that the residency condition of the reduced-capability terminal is met, report the measurement result of the second-category frequency point.

[0011] Preferably, the first type of frequency point is at least one of a frequency division duplex frequency point and a long term evolution frequency point;

[0012] The second type of frequency point is a time division duplex frequency point.

[0013] Preferably, in step S2, when the target terminal is in a connected state, measurement is initiated according to the first type of frequency points and the second type of frequency points to obtain the measurement result.

[0014] Preferably, in step S2, when the target terminal is in an idle state, the first-category frequency points and the second-category frequency points are sorted according to priority and measurement is initiated to obtain the measurement result.

[0015] Preferably, the preset threshold is any one of a reselection threshold, a switching threshold and a redirection threshold.

[0016] Preferably, the step S4 further includes:

[0017] Step S4.1: When the first system information block indicates that the residency condition of the reduced capability terminal is not met, the cell of the second type of frequency point is added to the blacklist, and the measurement result of the second type of frequency point is no longer reported within a preset time period.

[0018] Preferably, the step S4.1 further includes:

[0019] Extend the measurement period of the second type of frequency points.

[0020] A second aspect of the present invention is to provide a communication system for implementing the above-mentioned communication method, the system being applied to a target terminal, the target terminal being a reduced-capability terminal, the system comprising:

[0021] a frequency classification unit, configured to receive frequencies sent by the network side and classify the frequencies to classify the frequencies into first-category frequencies and second-category frequencies;

[0022] a measurement reporting unit, connected to the frequency classification unit, configured to initiate measurement according to the first category of frequency points and the second category of frequency points, obtain measurement results, and report the measurement results of the first category of frequency points that meet a preset threshold;

[0023] a pre-reading unit, connected to the measurement reporting unit, configured to pre-read a first system information block when the measurement result of the second-category frequency point meets the preset threshold, the first system information block being used to indicate whether the cell of the second-category frequency point meets the residency condition of the reduced-capability terminal;

[0024] The measurement reporting unit is further configured to report the measurement result of the second type of frequency point when the first system information block indicates that the residency condition of the reduced capability terminal is met.

[0025] A third aspect of the present invention is to provide a terminal comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the communication method described above when executing the program.

[0026] A fourth aspect of the present invention is to provide a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, wherein the computer instructions are used to enable a computer to execute the communication method as described above.

[0027] The advantages or beneficial effects of the technical solution of the present invention are:

[0028] The present invention pre-reads the first system information block for the second-category frequency measurement cell that meets the preset threshold, and screens out the cells that meet the residence conditions before performing measurement reporting, thereby ensuring that the cells to which reselection, switching, and redirection are performed all meet the residence conditions of the reduced-capability terminal, thereby improving the stability and reliability of network access; at the same time, by screening and judging the cells in advance to identify the cells that meet the residence conditions of the reduced-capability terminal, the reconstruction process caused by the failure to upgrade the network can be reduced; in addition, the present invention enables the reduced-capability terminal to access the non-reduced-capability cell that meets the bandwidth and antenna requirements, thereby broadening the use scenarios and scope of the reduced-capability terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A flow chart of a communication method in a preferred embodiment of the present invention;

[0030] Figure 2 A flow chart of a communication method in a preferred embodiment of the present invention;

[0031] Figure 3 A structural block diagram of a communication system in a preferred embodiment of the present invention;

[0032] Figure 4 FIG. 1 is a schematic diagram of the overall flow of a communication method in a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0034] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other.

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0036] Hereinafter, some terms used in the embodiments of the present invention are explained to facilitate understanding by those skilled in the art.

[0037] Redcap (Reduced Capability) terminals are 5G terminals with reduced capabilities. They are a new type of terminal introduced by the 3GPP Release 17 standard and cannot access 5G NR non-Redcap cells according to the protocol specifications. Before Release 17, there was no distinction between Redcap terminals and non-Redcap terminals (i.e., traditional ordinary terminals).

[0038] In terms of bandwidth capability, a Redcap terminal refers to a terminal with a bandwidth capability of no more than 20 MHz when residing in an FR1 cell (no more than 100 MHz when residing in an FR2 cell). A non-Redcap terminal refers to a terminal with a bandwidth capability of more than 20 MHz when residing in an FR1 cell (more than 100 MHz when residing in an FR2 cell).

[0039] FR1 cell refers to the network coverage area of frequency range 1 in the 5G NR (New Radio) network. FR2 cell refers to the network coverage area of frequency range 2 in the 5G NR network.

[0040] Frequency: refers to a specific frequency value in the communication frequency band. This frequency value is used to distinguish different communication channels or to specify the transmission and reception frequencies of wireless signals to avoid interference between different communication signals, allowing multiple users to communicate simultaneously in the same frequency band.

[0041] Cell: A cell is a basic service area in a mobile communication network. Each cell is assigned a specific frequency for signal transmission and reception. Different cells can use different frequencies to avoid signal interference. Cells are divided into redcap cells and non-redcap cells.

[0042] The present invention relates to TDD (Time Division Duplex), FDD (Frequency Division Duplex), and LTE (Long Term Evolution) frequencies. Based on existing network deployments, TDD frequencies in 5GNR non-Redcap cells typically use 100 MHz for TDD, and 20 MHz or less for FDD. LTE frequencies, used by Long Term Evolution technology, typically use 20 MHz or less. These frequencies are used for signal transmission and data carrying in mobile communications.

[0043] For example, a mobile communication network may have multiple TDD frequency cells, multiple FDD frequency cells, and multiple LTE frequency cells. When a terminal needs to access the network, it will select the appropriate frequency to communicate with the corresponding cell based on the network configuration and its own needs.

[0044] SIB1 (System Information Block 1): System Information Block 1 (hereinafter referred to as the first system information block). The SIB1 message carries the basic information required by the terminal (UE) to access the wireless cell, random access parameters, the availability and scheduling period of other SIBs, and also notifies whether one or more SIBs are broadcast as requested, and provides the PRACH configuration required by the terminal (UE) to request other SI.

[0045] In a preferred embodiment of the present invention, based on the above problems existing in the prior art, a communication method is provided, which is applied to a target terminal, wherein the target terminal is a reduced capability (Redcap) terminal, such as Figure 1 As shown, the method includes:

[0046] Step S1: receiving frequencies sent by the network side and classifying the frequencies into first-category frequencies and second-category frequencies;

[0047] Step S2: Initiate measurement based on the first and second frequency points, obtain measurement results, and report the measurement results of the first frequency points that meet a preset threshold;

[0048] Step S3: When the measurement result of the second-category frequency point meets the preset threshold, pre-read the first system information block SIB1, where the first system information block SIB1 is used to indicate whether the cell of the second-category frequency point meets the residency condition of the reduced-capability terminal;

[0049] Step S4: When the first system information block SIB1 indicates that the residency condition of the reduced capability terminal is met, the measurement result of the second type of frequency point is reported.

[0050] Specifically, in the existing technology, if the 5G NR Redcap terminal directly measures and reports according to the protocol requirements, it will reselect, switch or redirect to the NR non-Redcap cell that cannot meet the residency conditions. As a result, the corresponding terminal can only maintain the connection through reconstruction, which in turn causes a series of problems such as data interruption, seriously affecting the user experience and network stability.

[0051] In this embodiment, the first system information block SIB1 is pre-read for the second-category frequency measurement cell that meets the preset threshold, and then the cells that meet the Redcap terminal residence conditions are screened out, thereby ensuring that the cells reached by reselection, switching, redirection and other operations can meet the residence requirements of the reduced-capability terminal, avoiding network instability and unreliability caused by accessing cells that do not meet the conditions, improving the overall stability and reliability of network access, and providing users with a more stable network service experience.

[0052] At the same time, since the cells are screened and judged in advance, the cells that meet the conditions for the residence of reduced-capacity terminals can be accurately identified, thereby reducing the terminal reconstruction process caused by the failure to upgrade the network, avoiding the inconvenience and impact caused to users by the reconstruction process, and improving user satisfaction with the network.

[0053] In addition, when a 5G NR non-redcap cell meets the following conditions: the partial bandwidth (Bandwidth Part, BWP) is less than or equal to 20MHz, DL maxMIMO-Layers is less than or equal to 2, and UL maxRank is 1. At this time, redcap terminals can reside. The present invention enables reduced-capability terminals to break through the original limitations and access non-redcap cells that meet the bandwidth and antenna requirements, broadening their usage scenarios and scope to meet the needs of different users in different scenarios.

[0054] The DLmaxMIMO-Layers feature allows up to two layers of MIMO transmission to be used in the downlink. Simply put, this means that when a base station sends a signal to a terminal, it can use up to two different antennas or signal paths simultaneously.

[0055] A UL maxRank of 1 means that in the uplink direction, the maximum rank of the terminal when sending signals is 1. The rank reflects the number of independent data streams that can be transmitted simultaneously in technologies such as spatial multiplexing. A rank of 1 means that at most one independent data stream can be transmitted simultaneously in the uplink.

[0056] As a preferred embodiment, the first type of frequency point is at least one of a frequency division duplex (FDD) frequency point and a long term evolution (LTE) frequency point;

[0057] The second type of frequency is time division duplex (TDD) frequency.

[0058] To be more specific, this embodiment classifies the frequencies sent down by the network side and divides them into NR TDD frequencies, NR FDD frequencies and LTE frequencies.

[0059] In the communications field, frequency classification is based on industry standards and the experience accumulated from extensive field testing. Specifically, NR TDD frequencies are typically deployed with a 100MHz bandwidth and equipped with four antennas. This configuration does not meet the access requirements of Redcap terminals. In other words, these NR TDD frequencies are inaccessible to Redcap terminals, preventing them from establishing effective connections and communications.

[0060] The NR FDD frequency band has a network bandwidth of 20 MHz and two antennas are configured. This configuration meets the access requirements of Redcap terminals.

[0061] Among them, NR FDD frequencies and LTE frequencies are classified as first-category frequencies, while NR TDD frequencies are classified as second-category frequencies.

[0062] For the first type of frequencies, namely NR FDD frequencies and LTE frequencies, when measurements are initiated based on these frequencies, if the measurement results of these frequencies meet the threshold conditions set for reselection, handover or redirection, the measurements are reported according to the established process.

[0063] For the second type of frequency, namely NR TDD frequency, when initiating measurement based on the NR TDD frequency, if the measurement result of the NR TDD frequency meets the threshold conditions set for reselection, handover or redirection, the first system information block SIB1 will be pre-read. Only when the NR TDD frequency meets the Redcap terminal residence condition will the measurement result of the NR TDD frequency be measured and reported together with the measurement results of the NR RFDDD frequency and LTE frequency.

[0064] In the communication system, if Redcap terminals directly report measurements according to protocol requirements without the above classification processing, they may reselect, switch, or redirect to a cell that does not meet the Redcap terminal's residency conditions. Once the terminal accesses such a cell, the failure to meet the residency conditions may lead to unstable connection, which in turn may cause data interruption and other problems.

[0065] By classifying the frequencies in this embodiment, pre-reading SIB1 for the NR TDD frequencies, and performing measurement reporting only when the residency conditions are met, this situation can be effectively avoided. Because before the measurement report is performed, whether the cell meets the residency conditions of the Redcap terminal has been screened and judged, only cells that meet the conditions will be included in the measurement reporting range. This ensures that the cells to which the Redcap terminal reselects, switches or redirects are able to meet its residency conditions, thereby avoiding defects such as data interruption caused by accessing cells that do not meet the conditions, improving the stability and reliability of the network, and ensuring the normal communication of the Redcap terminal.

[0066] As a preferred implementation, in step S2, when the target terminal is in a connected state, measurement is initiated based on the first type of frequency points and the second type of frequency points to obtain measurement results.

[0067] Specifically, the connected state refers to the state in which the target terminal has established a connection with the network and is transmitting data or maintaining a communication link. In the connected state, the terminal and the network maintain active interaction and can perform various communication operations, such as sending and receiving data.

[0068] According to the protocol, in the connected state, there is no priority distinction, and the measurement control of different frequencies and systems is determined by the network side.

[0069] Hetero-frequency refers to different frequencies, such as the frequency difference between the NR TDD frequency, NR FDD frequency and LTE frequency sent by the network side. These different frequencies are in an heterodyne relationship with each other.

[0070] Different systems refer to different communication systems. For example, the NR system and the LTE system are different systems. For example, the target terminal performs operations such as measurement, reselection, switching or redirection in different communication systems (such as switching from the NR system to the LTE system) or between different frequency points.

[0071] In this embodiment, when the target terminal is in a connected state, measurements are initiated sequentially according to the NR TDD frequency, NR FDD frequency, and LTE frequency in the order determined by the network side, thereby obtaining corresponding measurement results.

[0072] In the initial state, the NR FDD or LTE measurement period is N-1 times the same-frequency measurement, and the NRTDD measurement period is N times the same-frequency measurement.

[0073] If there is no Redcap cell on the NR TDD frequency, its measurement period is adjusted to 2N times of the same-frequency measurement to reduce the number of measurement frames at this frequency.

[0074] As a preferred implementation, in step S2, when the target terminal is in an idle state, the first-category frequency points and the second-category frequency points are sorted according to priority and measurement is initiated to obtain measurement results.

[0075] Specifically, the idle state refers to a relatively static state in which a connection is established between the target terminal and the network but there is no data transmission required. In the idle state, the terminal may periodically perform some measurements and other activities to maintain awareness of the network environment, but it does not continuously transmit data as in the connected state. For example, a terminal enters the idle state when it has not sent or received data for a period of time. When new data needs to be transmitted, the terminal switches from the idle state back to the connected state.

[0076] In the idle state, the priority of the corresponding frequency is determined by comparing the cell reselection priority cellReselectionPriority of the serving cell corresponding to the frequency and the cell reselection priority cellReselectionPriority of the different frequency or different system according to the priority specified in the protocol. For details, please refer to the system information block SIB2 / SIB4 / SIB5 in the protocol 38.331.

[0077] If the serving cell is NR TDD and the Reference Signal Received Power (RSRP) signal is within the preset range, for example, RSRP < Threshold 1 and > Threshold 2, then the conditions for initiating equal priority or lower priority measurements are not met. When the high-priority frequency does not include NR FDD or LTE frequency points, the measurement of equal priority and lower priority NR FDD or LTE frequency points can be released in advance, and the measurement period is N times that of the same-frequency measurement.

[0078] If the RSRP signal is less than threshold 2, equal or lower priority measurements are initiated. The measurement period for the NR FDD or LTE frequency is N-1 times that of the same-frequency measurement. Initially, the measurement period for the NR TDD frequency is N times that of the same-frequency measurement. If there is no Redcap cell on the NR TDD frequency, the measurement period is adjusted to 2N times that of the same-frequency measurement.

[0079] As a preferred implementation, the preset threshold is any one of a reselection threshold, a switching threshold, and a redirection threshold.

[0080] Specifically, reselection refers to the process by which a terminal, while in idle state, selects the optimal cell to reside in, based on network-configured parameters (such as the reselection threshold). The terminal continuously measures parameters such as signal quality in surrounding cells and makes decisions and switches based on pre-set rules to achieve optimal communication performance and resource utilization.

[0081] Switching means that in the connected state, when the signal quality and other parameters of the current serving cell where the terminal is located deteriorate to a certain extent, or the terminal enters the coverage range of an adjacent cell with better signal, the network side will trigger a switching operation to switch the terminal from the current serving cell to another cell to maintain communication continuity and stability.

[0082] Redirection refers to the process in which the network guides the terminal to another system (such as switching from 4G to 3G, etc.) or another frequency cell for communication when the current serving cell where the terminal is located cannot meet the communication needs (such as the terminal moves to the edge of the coverage area, etc.), so as to ensure the continuity of communication and avoid service interruption due to the terminal's inability to communicate normally in the current system.

[0083] The preset threshold may be a reselection threshold, a handover threshold, or a redirection threshold, which are determined according to the network side configuration.

[0084] For example, for switching and redirection, when a cell meets specific thresholds configured by the network (such as thresholds corresponding to A3, A4, A5, and B2 measurement events), it is necessary to pre-read the SIB1 message first. Only after the cell meets the Redcap terminal residence conditions can the cell be reported during the measurement process.

[0085] As a preferred embodiment, wherein Figure 2 As shown, step S4 also includes:

[0086] Step S4.1: When the first system information block indicates that the reduced capability terminal resides at a condition that the cell is not satisfied, the second frequency cell is added to a blacklist, and measurement results of the second frequency cell are not reported for a preset period of time.

[0087] In this embodiment, the preset duration is preferably 5 minutes. That is, within 5 minutes, the target terminal will not send measurement results for cells on the NR TDD frequency to the network. This can prevent excessive network load or erroneous decisions caused by frequent measurement reports. Of course, the preset duration is not limited to this. In other embodiments, it can be set based on specific network requirements, terminal type, service characteristics, and other factors.

[0088] Specifically, in this embodiment, when a cell of the NR TDD frequency point cannot meet the Redcap terminal residence conditions, the cell is added to the blacklist, and no measurement reporting, reselection, or residence processing will be performed on the cell within 5 minutes.

[0089] As a preferred embodiment, step S4.1 further includes:

[0090] Extend the measurement period of the second type of frequency points.

[0091] Specifically, in the initial state, the measurement period of the NR TDD frequency point is N times that of the same-frequency measurement.

[0092] In this embodiment, when all cells on the NR TDD frequency are non-Redcap cells, in other words, when there are no Redcap cells on the NR TDD frequency, it is necessary to extend the measurement period of the NR TDD frequency. For example, the measurement period of the NR TDD frequency is adjusted to 2N times the same-frequency measurement to reduce the number of measurement frames for the frequency.

[0093] The present invention also provides a communication system for implementing the above communication method, the system is applied to a target terminal, the target terminal is a reduced capability terminal, such as Figure 3 As shown, the system includes:

[0094] The frequency classification unit 1 is configured to receive frequencies sent from the network side and classify the frequencies into first-category frequencies and second-category frequencies;

[0095] The measurement reporting unit 2 is connected to the frequency classification unit 1, and is used to initiate measurement based on the first and second frequency categories, obtain measurement results, and report the measurement results of the first frequency category that meet the preset threshold;

[0096] a pre-reading unit 3, connected to the measurement reporting unit 2, configured to pre-read a first system information block when the measurement result of the second type of frequency point meets a preset threshold, the first system information block being used to indicate whether the cell of the second type of frequency point meets the residency condition of the reduced capability terminal;

[0097] The measurement reporting unit 2 is further configured to report the measurement result of the second type of frequency point when the first system information block indicates that the residency condition of the reduced capability terminal is met.

[0098] Specifically, in the existing technology, if the 5G NR Redcap terminal directly measures and reports according to the protocol requirements, it will reselect, switch or redirect to the NR non-Redcap cell that cannot meet the residency conditions, resulting in the corresponding terminal having to maintain the connection through reconstruction, which in turn causes a series of problems such as data interruption.

[0099] To solve this problem, this embodiment proposes a method for mobile terminals to flexibly access the 5G network, that is, allowing 5G NR Redcap terminals to access 5G NR non-Redcap cells that meet the bandwidth and antenna requirements. In order to ensure access to 5GNR Redcap and non-Redcap cells, the measurement and reporting scheme for 5G NR Redcap and non-Redcap coexisting terminals is optimized. Since it is known that the TDD frequency of the existing 5G NR non-Redcap cells basically adopts 100M network, and the FDD frequency basically adopts 20M and below network, for example, in the connected state, the corresponding TDD frequency needs to be pre-read in advance SIB1. If the cell supports Redcap, the measurement report of the TDD frequency is completed. Otherwise, the cell is added to the blacklist, and no measurement reporting, reselection, residence, etc. are performed within 5 minutes.

[0100] For FDD and LTE frequencies, there is no need to pre-read SIB1 and they can be measured and reported directly.

[0101] For the convenience of description, the above system is described as being divided into various modules according to their functions. Of course, when implementing the present invention, the functions of each unit or module can be implemented in the same or multiple software and / or hardware.

[0102] The embodiment of the present invention takes the 5G NR Redcap and non-Redcap coexisting terminal measurement optimization solution in the connected state as an example. The measurement reporting strategy in the idle state is similar to that in the connected state.

[0103] like Figure 4 As shown, the solution includes the following processes:

[0104] Step 1: Measure and arrange all frequency points sent by the network side;

[0105] Among them, the frequencies sent down by the network side can be divided into NR TDD frequencies, NR FDD frequencies and LTE frequencies. NR FDD frequencies and LTE frequencies are classified as first-category frequencies, and NR TDD frequencies are classified as second-category frequencies.

[0106] According to the protocol, in connected mode, there is no priority between NR TDD, NRFDD, and LTE frequencies. Inter-frequency and inter-system measurement control is determined by the network. In idle mode, measurements are initiated according to the protocol's priority order, and measurement results are obtained for each frequency.

[0107] Step 2: Determine whether the measurement result meets a preset threshold, which may be a reselection threshold, a handover threshold, or a redirection threshold;

[0108] Step 2.1: For the LTE frequency, if the cell on the LTE frequency meets the reselection threshold, handover threshold, or redirection threshold, proceed to step 3; if not, terminate the process.

[0109] Step 2.2: For the FDD frequency, if the cell on the FDD frequency meets the reselection threshold, handover threshold, or redirection threshold, proceed to step 3; if not, terminate the process.

[0110] Step 2.3: For TDD frequency, if the cell on the TDD frequency meets the reselection threshold, handover threshold, or redirection threshold, proceed to step 4; if not, terminate the process;

[0111] Step 3: Measure and report the cells that meet the preset threshold on the frequency point, and then end the process;

[0112] Step 4: Pre-read SIB1 for cells that meet the preset threshold on the NR TDD frequency point, and then execute step 5;

[0113] Step 5: Based on the pre-read SIB1, determine whether the cell that meets the preset threshold on the NR TDD frequency point is a Redcap cell. If it is a Redcap cell, execute step 3; otherwise, execute step 6.

[0114] Step 6: Bar the cell; that is, add the cell to the blacklist and no longer perform any measurement reporting, reselection, or residency processing within 5 minutes;

[0115] Step 7: Determine whether all cells meeting the preset threshold on the NR TDD frequency point have no Redcap cells:

[0116] If the cell that meets the preset threshold on the NR TDD frequency point is a Redcap cell, the process ends;

[0117] If there is no Redcap cell, go to step 8;

[0118] Step 8: Adjust the measurement period of the NR TDD frequency to 2N and return to step 1.

[0119] The measurement optimization solution for 5G NR Redcap and non-Redcap coexisting terminals in an embodiment of the present invention pre-reads SIB1 for the measurement cells on the NR TDD frequency points that meet the reselection, switching or redirection thresholds. Only the cells that meet the residency conditions are measured and reported. Otherwise, the NR TDD cell is Barred, and other NR TDD or LTE cells are not affected. This solution can better ensure that the cells to which reselection, switching, and redirection are performed meet the residency conditions, reducing the reconstruction process caused by the failure of the network to be upgraded.

[0120] The present invention also provides a terminal, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above-mentioned communication method when executing the program.

[0121] Specifically, the memory is used to store various data and information. The memory can be various types of storage media, such as flash memory, hard disk drive or other semiconductor storage devices.

[0122] The processor is the core processing unit of the terminal and is responsible for performing various calculations and control tasks. In the present invention, when the processor executes a specific computer program, it can implement the communication method described above. The processor has high-speed computing power and processing speed, can quickly process instructions and data from various components of the terminal, and output the processing results to other parts of the terminal or external devices. It should be understood that the processor can be understood as one or more central processing units (CPUs), graphics processing units (GPUs) or other dedicated processors, etc., and is selected according to the application scenario and performance requirements of the terminal.

[0123] A computer program is software code stored in a memory that contains the specific logic and algorithms for implementing the communication methods described above. This computer program can be written in various programming languages, such as C, C++, and Java. When a processor reads and executes this program, it follows the steps and processes defined in the program, thereby enabling communication with other devices or systems.

[0124] The present invention also provides a computer-readable storage medium, which stores computer instructions, wherein the computer instructions are used to enable a computer to execute the communication method as described above.

[0125] Specifically, a computer-readable storage medium is a physical medium that can store computer instructions, providing computer systems with the ability to store data and programs long-term. This storage medium can take various forms, such as hard drives, optical disks, flash drives, and memory cards. It is non-volatile, meaning that data stored on it remains intact even when the power is turned off.

[0126] Computer instructions are written in a specific programming language and are used to instruct a computer to perform specific operations or tasks. In the present invention, computer instructions are used to cause a computer to execute the communication methods mentioned above. These instructions contain a series of opcodes and operands. Through the interpretation and execution of the processor, communication-related functions such as establishing a connection, sending data, receiving data, and processing data can be implemented to complete the communication task.

[0127] The advantages or beneficial effects of adopting the above technical solution are: the present invention pre-reads the first system information block for the second-category frequency measurement cell that meets the preset threshold, and screens out the cells that meet the residence conditions before measuring and reporting, thereby ensuring that the cells to which reselection, switching, and redirection are made meet the residence conditions of the reduced-capability terminal, thereby improving the stability and reliability of network access; at the same time, by screening and judging the cells in advance to identify the cells that meet the residence conditions of the reduced-capability terminal, the reconstruction process caused by the failure to upgrade the network can be reduced; in addition, the present invention enables the reduced-capability terminal to access the non-reduced-capability cell that meets the bandwidth and antenna requirements, thereby broadening the use scenarios and scope of the reduced-capability terminal.

[0128] The above are only preferred embodiments of the present invention and do not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the contents of this specification and illustrations should be included in the protection scope of the present invention.

Claims

1. A communication method, characterized in that: Applied to a target terminal, where the target terminal is a reduced-capability terminal, the method includes: Step S1: receiving frequency points sent by the network side, and classifying the frequency points to divide the frequency points into first-category frequency points and second-category frequency points; Step S2: Initiate measurement based on the first-category frequency points and the second-category frequency points, obtain measurement results, and report the measurement results of the first-category frequency points that meet a preset threshold; Step S3: When the measurement result of the second-category frequency point meets the preset threshold, pre-reading a first system information block, where the first system information block is used to indicate whether the cell of the second-category frequency point meets the residency condition of the reduced-capability terminal; Step S4: When the first system information block indicates that the residency condition of the reduced-capability terminal is met, report the measurement result of the second-category frequency point.

2. The communication method according to claim 1, wherein: The first type of frequency point is at least one of a frequency division duplex frequency point and a long term evolution frequency point; The second type of frequency point is a time division duplex frequency point.

3. The communication method according to claim 1, wherein: In the step S2, when the target terminal is in a connected state, measurement is initiated according to the first type of frequency points and the second type of frequency points to obtain the measurement result.

4. The communication method according to claim 1, wherein: In the step S2, when the target terminal is in an idle state, the first-category frequency points and the second-category frequency points are sorted according to priority and measurement is initiated to obtain the measurement result.

5. The communication method according to claim 1, wherein: The preset threshold is any one of a reselection threshold, a switching threshold and a redirection threshold. The communication method according to claim 1 , wherein: The step S4 further includes: Step S4.1: When the first system information block indicates that the residency condition of the reduced capability terminal is not met, the cell of the second type of frequency point is added to the blacklist, and the measurement result of the second type of frequency point is no longer reported within a preset time period.

7. The communication method according to claim 6, wherein: The step S4.1 further includes: Extend the measurement period of the second type of frequency points.

8. A communication system, characterized in that: For implementing the communication method according to any one of claims 1 to 7, the system is applied to a target terminal, the target terminal being a reduced-capability terminal, the system comprising: a frequency classification unit, configured to receive frequencies sent by the network side and classify the frequencies to classify the frequencies into first-category frequencies and second-category frequencies; a measurement reporting unit, connected to the frequency classification unit, configured to initiate measurement according to the first category of frequency points and the second category of frequency points, obtain measurement results, and report the measurement results of the first category of frequency points that meet a preset threshold; a pre-reading unit, connected to the measurement reporting unit, configured to pre-read a first system information block when the measurement result of the second-category frequency point meets the preset threshold, the first system information block being used to indicate whether the cell of the second-category frequency point meets the residency condition of the reduced-capability terminal; The measurement reporting unit is further configured to report the measurement result of the second type of frequency point when the first system information block indicates that the residency condition of the reduced capability terminal is met.

9. A terminal, characterized in that: The method comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the communication method according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer instructions, wherein the computer instructions are used to enable a computer to execute the communication method according to any one of claims 1 to 7.

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