Information transmission method, device and system

Abstract

The application provides an information transmission method, device and system, and relates to the technical field of communication. The method comprises the following steps: a network device sends a first synchronization signal used for determining a master information block; accordingly, a terminal receives the first synchronization signal. The terminal determines the master information block according to the first synchronization signal, the master information block contains cell selection information, and the terminal can determine whether to camp on a first cell according to the cell selection information. The energy consumption of the terminal can be reduced, and unnecessary power consumption can be saved.

Description

[0001] This application claims priority to Chinese Patent Application No. 202510535592.5, filed on April 25, 2025, entitled "Information Transmission Method, Apparatus and System", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of communications, and more particularly to an information transmission method, apparatus, and system. Background Technology

[0003] In mobile communication systems, in addition to considering performance design and development requirements such as transmission latency, reliability, and feasibility, the energy efficiency of the terminal is also one of the core challenges in communication system design.

[0004] Currently, the power consumption of the terminal in the system during radio resource control (RRC) idle / inactive states is approximately tens of milliwatts, while the power consumption during RRC connected states can reach hundreds of milliwatts. This level of power consumption places high demands on the performance of the terminal's battery; otherwise, frequent charging will be required. In some scenarios, the terminal may use small rechargeable or non-rechargeable batteries, such as wearable devices like smartwatches in IoT scenarios and sensors in vertical industries, which have even higher energy efficiency requirements.

[0005] Therefore, those skilled in the art are dedicated to researching solutions to reduce terminal power consumption and improve terminal energy efficiency. Summary of the Invention

[0006] This application provides an information transmission method, apparatus, and system to reduce terminal power consumption and improve terminal energy efficiency.

[0007] In a first aspect, an information transmission method is provided, which can be executed by a first communication device, wherein the first communication device can be a terminal or a unit / module / component (such as a chip, chip system, logic circuit or software) configurable to (or usable in) a terminal.

[0008] The method includes: a terminal receiving a first synchronization signal, the first synchronization signal being used to determine a master information block; and the terminal acquiring cell selection information, the master information block including the cell selection information, the cell selection information being used to determine whether to camp on a first cell.

[0009] According to the above scheme, after receiving the first synchronization signal and determining the main information block, the terminal can obtain cell selection information from the main information block. Based on the cell selection information, the terminal can determine whether it can camp on the first cell. If the terminal determines that it cannot camp on the first cell based on the cell selection information, the terminal can give up accessing the network from the first cell without needing to further obtain the SIB1 of the first cell. Compared with the current method where the terminal needs to decode a large amount of information in SIB1 after obtaining the MIB, this reduces unnecessary power consumption and improves terminal energy efficiency.

[0010] In conjunction with the first aspect, in some implementations of the first aspect, the method further includes: the terminal acquiring inter-frequency cell frequency information, the main information block including the inter-frequency cell frequency information; or, the inter-frequency cell frequency information is carried on a first signal, and the time-frequency resources for transmitting the first signal are determined according to the main information block. Wherein, the inter-frequency cell frequency information is used for monitoring a second synchronization signal, the frequency point of the second synchronization signal being different from the frequency point of the first synchronization signal.

[0011] According to the above scheme, the terminal obtains the inter-frequency cell frequency information in the first cell based on the main information block. This inter-frequency cell frequency information can be contained within the main information block or carried on the first signal, and the time-frequency resources for transmitting the first signal are determined based on the main information block. This allows the terminal to obtain the inter-frequency cell frequency information in a timely manner, enabling it to determine the frequency points where cells are deployed and avoiding blind searches. Compared to the current method where, when the terminal determines it cannot camp on a cell, it searches for cells on the next frequency point (which may not actually be a deployed cell) based on the synchronization grid, the terminal can now identify the frequency points where synchronization signals exist based on the inter-frequency cell frequency information, improving the efficiency of cell search and reducing unnecessary power consumption.

[0012] In conjunction with the first aspect, in certain implementations of the first aspect, the inter-frequency cell frequency information includes at least one of the following: the carrier frequency point, frequency domain bandwidth, synchronization signal block frequency position, subcarrier spacing of the synchronization signal block, measurement time configuration of the synchronization signal block, cell reselection priority, or cell reselection sub-priority of at least one cell. Alternatively, the inter-frequency cell frequency information includes at least one frequency domain offset, which includes at least one of the following: the frequency domain offset between the center frequency point of the first cell and the center frequency point of the second cell, and the frequency domain offset between the center frequency point of the first synchronization signal and the center frequency point of the second synchronization signal.

[0013] According to the above scheme, the inter-frequency cell frequency information is used to indicate at least one frequency point, which is an inter-frequency point that has a synchronization signal (i.e., a cell has been deployed) that is different from the carrier frequency point of the first cell. Alternatively, the at least one frequency point is different from the center frequency point of the first cell, and / or the at least one frequency point is different from the center frequency point of the first synchronization signal.

[0014] In conjunction with the first aspect, in some implementations of the first aspect, the inter-frequency cell frequency information includes at least one frequency domain offset, and the method further includes: acquiring inter-frequency cell time information, wherein the main information block includes the inter-frequency cell time information; or, the inter-frequency cell time information is carried on the first signal. The inter-frequency cell time information is used for monitoring the second synchronization signal.

[0015] According to the above scheme, the terminal can monitor the second synchronization signal at the second frequency point within the corresponding time period based on the frequency and time information of the inter-frequency cell. This can avoid unnecessary power consumption of the terminal and improve its energy efficiency.

[0016] In conjunction with the first aspect, in some implementations of the first aspect, the first signal is downlink control information.

[0017] In conjunction with the first aspect, in some implementations of the first aspect, the downlink control information includes scheduling information of the first system information block.

[0018] According to the above scheme, the first signal can be a DCI (Digital Channel Interchange), which can include inter-frequency cell frequency information and scheduling information of the system, such as SIB1. The terminal can monitor the synchronization signals of other cells based on the inter-frequency cell frequency information to determine the frequency points where synchronization signals exist. This allows the terminal to obtain inter-frequency cell frequency information in a timely manner, saving power consumption.

[0019] In conjunction with the first aspect, in some implementations of the first aspect, the first signal is a first system information block, which includes the inter-frequency cell frequency information. Alternatively, the first system information block includes the inter-frequency cell frequency information and inter-frequency cell time information, the inter-frequency cell time information being used for monitoring the second synchronization signal.

[0020] According to the above scheme, the first system information block can be SIB1. During the process of attempting to access the network, the terminal can obtain SIB1 based on MIB and obtain inter-frequency cell frequency information from SIB1. Compared with the current method of obtaining scheduling information from other SIBs from SIB1 and then receiving inter-frequency cell information from SIB4 based on the scheduling information, the terminal can obtain inter-frequency cell frequency information in a timely manner during the network access process. Based on the inter-frequency cell frequency information, the terminal can monitor the synchronization signal at the frequency point where the synchronization signal exists, avoid the terminal blindly searching, increase the probability of the terminal accessing the network, and reduce the energy consumption of the terminal during the network access process.

[0021] In conjunction with the first aspect, in some implementations of the first aspect, the first system information block includes at least one of the following: terminal access prohibition information, cell access related information, serving cell public configuration information, connection establishment failure control information, or non-critical extended information.

[0022] According to the above scheme, the first part may include at least one of the above information, such as information on whether the terminal is allowed to camp on the cell, and / or information required by the terminal to perform the random access procedure, etc. This allows the terminal to save power consumption and improve energy efficiency by not having to decode a large amount of SIB1 information when it is not necessary.

[0023] Secondly, an information transmission method is provided, which can be executed by a second communication device, wherein the second communication device can be a network device or a unit / module / component (such as a chip, chip system, logic circuit or software) configurable in (or usable in) a network device.

[0024] The method includes: a network device sending a first synchronization signal, the first synchronization signal being used to determine a master information block, wherein the master information block includes cell selection information, the cell selection information being used to determine whether to camp on a first cell.

[0025] According to the above scheme, the MIB of the first cell can include cell selection information, allowing the terminal to obtain the cell selection information from this main information block and determine whether it can camp on the first cell based on the cell selection information. If the terminal determines that it cannot camp on the first cell based on the cell selection information, the terminal can abandon accessing the network from the first cell without needing to further obtain the SIB1 of the first cell. Compared to the current method where the terminal needs to decode a large amount of information in SIB1 after obtaining the MIB, this reduces unnecessary power consumption and improves terminal energy efficiency.

[0026] In conjunction with the second aspect, in some implementations of the second aspect, the method further includes: a network device determining inter-frequency cell frequency information, the main information block including the inter-frequency cell frequency information. Alternatively, the inter-frequency cell frequency information is carried on a first signal, the time-frequency resources for transmitting the first signal are determined according to the main information block, wherein the inter-frequency cell frequency information is used for monitoring a second synchronization signal, the frequency point of the second synchronization signal being different from the frequency point of the first synchronization signal.

[0027] In conjunction with the second aspect, in some implementations of the second aspect, the inter-frequency cell frequency information includes at least one of the following: the carrier frequency point, frequency domain bandwidth, synchronization signal block frequency position, subcarrier spacing of the synchronization signal block, measurement time configuration of the synchronization signal block, cell reselection priority, or cell reselection sub-priority of at least one cell. Alternatively, the inter-frequency cell frequency information includes at least one frequency domain offset, which includes at least one of the following: the frequency domain offset between the center frequency point of the first cell and the center frequency point of the second cell; and the frequency domain offset between the center frequency point of the first synchronization signal and the center frequency point of the second synchronization signal.

[0028] In conjunction with the second aspect, in some implementations of the second aspect, the inter-frequency cell frequency information includes at least one frequency domain offset, and the method further includes: determining inter-frequency cell time information, wherein the main information block includes the inter-frequency cell time information. Alternatively, the inter-frequency cell time information is carried on the first signal, wherein the inter-frequency cell frequency information and the inter-frequency cell time information are used for monitoring the second synchronization signal.

[0029] In conjunction with the second aspect, in some implementations of the second aspect, the inter-frequency cell time information includes at least one time-domain offset, which includes the time-domain offset between the first synchronization signal and the second synchronization signal or the time-domain offset between the first cell and the second cell.

[0030] In conjunction with the second aspect, in some implementations of the second aspect, the first signal is downlink control information.

[0031] In conjunction with the second aspect, in some implementations of the second aspect, the downlink control information includes the scheduling information of the first system information block.

[0032] In conjunction with the second aspect, in some implementations of the second aspect, the first signal is a first system information block, which includes the inter-frequency cell frequency information. Alternatively, the first system information block includes the inter-frequency cell frequency information and inter-frequency cell time information, the inter-frequency cell time information being used for monitoring the second synchronization signal.

[0033] In conjunction with the second aspect, in some implementations of the second aspect, the first system information block includes at least one of the following: terminal access prohibition information, cell access related information, serving cell public configuration information, connection establishment failure control information, or non-critical extended information.

[0034] Thirdly, an information transmission method is provided, which can be executed by a third communication device, wherein the third communication device can be a terminal or a unit / module / component (such as a chip, chip system, logic circuit or software) configurable to (or usable in) a terminal.

[0035] The method includes: a terminal receiving a first synchronization signal, which is used to determine a master information block; the terminal acquiring inter-frequency cell frequency information, the master information block including the inter-frequency cell frequency information; or, the inter-frequency cell frequency information is carried on a first signal, and the time-frequency resources for transmitting the first signal are determined based on the master information block. The inter-frequency cell frequency information is used for monitoring a second synchronization signal, the frequency of which is different from the frequency of the first synchronization signal.

[0036] According to the above scheme, the terminal obtains the inter-frequency cell frequency information in the first cell based on the main information block. This inter-frequency cell frequency information can be contained within the main information block or carried on the first signal, and the time-frequency resources for transmitting the first signal are determined based on the main information block. This allows the terminal to obtain the inter-frequency cell frequency information in a timely manner, enabling it to determine the frequency points where cells are deployed and avoiding blind searches. Compared to the current method where, when the terminal determines it cannot camp on a cell, it searches for cells on the next frequency point (which may not actually be a deployed cell) based on the synchronization grid, the terminal can now identify the frequency points where synchronization signals exist based on the inter-frequency cell frequency information, improving the efficiency of cell search and reducing unnecessary power consumption.

[0037] In conjunction with the third aspect, in some implementations of the third aspect, the main information block also includes cell selection information, which is used to determine whether to camp on the first cell.

[0038] In conjunction with the third aspect, in certain implementations of the third aspect, the inter-frequency cell frequency information includes at least one of the following: the carrier frequency point, frequency domain bandwidth, synchronization signal block frequency position, subcarrier spacing of the synchronization signal block, measurement time configuration of the synchronization signal block, cell reselection priority, or cell reselection sub-priority of at least one cell. Alternatively, the inter-frequency cell frequency information includes at least one frequency domain offset, which includes at least one of the following: the frequency domain offset between the center frequency point of the first cell and the center frequency point of the second cell, and the frequency domain offset between the center frequency point of the first synchronization signal and the center frequency point of the second synchronization signal.

[0039] In conjunction with the third aspect, in some implementations of the third aspect, the inter-frequency cell frequency information includes at least one frequency domain offset, and the method further includes: the terminal acquiring inter-frequency cell time information, the main information block including the inter-frequency cell time information. Alternatively, the inter-frequency cell time information is carried on the first signal. The inter-frequency cell time information is used for monitoring the second synchronization signal.

[0040] In conjunction with the third aspect, in some implementations of the third aspect, the inter-frequency cell time information includes at least one time-domain offset, which includes at least one of the following: the time-domain offset between the first synchronization signal and the second synchronization signal, and the time-domain offset between the first cell and the second cell.

[0041] In conjunction with the third aspect, in some implementations of the third aspect, the first signal is downlink control information.

[0042] In conjunction with the third aspect, in some implementations of the third aspect, the downlink control information includes the scheduling information of the first system information block.

[0043] In conjunction with the third aspect, in some implementations of the third aspect, the first signal is a first system information block, which includes the inter-frequency cell selection frequency information. Alternatively, the first system information block includes the inter-frequency cell frequency information and the inter-frequency cell time information, the inter-frequency cell time information being used for monitoring the second synchronization signal.

[0044] In conjunction with the third aspect, in some implementations of the third aspect, the first system information block includes at least one of the following: terminal access prohibition information, cell access related information, serving cell public configuration information, connection establishment failure control information, or non-critical extended information.

[0045] Fourthly, an information transmission method is provided, which can be executed by a fourth communication device, wherein the fourth communication device can be a network device or a unit / module / component (such as a chip, chip system, logic circuit or software) configurable in (or usable in) a network device.

[0046] The method includes: a network device sending a first synchronization signal, the first synchronization signal being used to determine a master information block, wherein the master information block includes inter-frequency cell frequency information. Alternatively, the inter-frequency cell frequency information is carried on a first signal, and the time-frequency resources for transmitting the first signal are determined based on the master information block. The inter-frequency cell frequency information is used for monitoring a second synchronization signal, the frequency of which is different from the frequency of the first synchronization signal.

[0047] According to the above scheme, the MIB or the first signal obtained based on the MIB may include inter-frequency cell frequency information, which allows the terminal to obtain inter-frequency cell frequency information as early as possible during network access. This enables the terminal to obtain inter-frequency cell frequency information in a timely manner, avoids the terminal blindly searching for cells, and saves terminal power consumption.

[0048] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the main information block also includes cell selection information, which is used to determine whether to camp on the first cell.

[0049] In conjunction with the fourth aspect, in certain implementations of the fourth aspect, the inter-frequency cell frequency information includes at least one of the following: the carrier frequency point, frequency domain bandwidth, synchronization signal block frequency position, subcarrier spacing of the synchronization signal block, measurement time configuration of the synchronization signal block, cell reselection priority, or cell reselection sub-priority of at least one cell. Alternatively, the inter-frequency cell frequency information includes at least one frequency domain offset, which includes at least one of the following: the frequency domain offset between the center frequency point of the first cell and the center frequency point of the second cell, and the frequency domain offset between the center frequency point of the first synchronization signal and the center frequency point of the second synchronization signal.

[0050] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the inter-frequency cell frequency information includes at least one frequency domain offset, and the method further includes: the network device determining the inter-frequency cell time information, the main information block including the inter-frequency cell time information. Alternatively, the inter-frequency cell time information is carried on the first signal. Wherein, the inter-frequency cell time information is used for monitoring the second synchronization signal.

[0051] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the inter-frequency cell time information includes at least one time-domain offset, which includes at least one of the following: the time-domain offset between the first synchronization signal and the second synchronization signal, and the time-domain offset between the first cell and the second cell.

[0052] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the first signal is downlink control information.

[0053] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the downlink control information includes the scheduling information of the first system information block.

[0054] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the first signal is a first system information block, which includes the inter-frequency cell selection frequency information. Alternatively, the first system information block includes the inter-frequency cell frequency information and the inter-frequency cell time information, the inter-frequency cell time information being used for monitoring the second synchronization signal.

[0055] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the first system information block includes at least one of the following: terminal access prohibition information, cell access related information, serving cell public configuration information, connection establishment failure control information, or non-critical extended information.

[0056] Fifthly, an information transmission method is provided, which can be executed by a fifth communication device, wherein the fifth communication device can be a terminal or a module (such as a logic circuit, a chip, or a chip system) that can be configured to (or used in) a terminal.

[0057] The method includes: a terminal receiving a first synchronization signal; the terminal determining a master information block based on the first synchronization signal; wherein the master information block is used to determine the time-frequency resources for transmitting a first portion of a first system information block, the first system information block further including a second portion, the time-frequency resources for transmitting the second portion being determined by at least one of the master information block or the first portion.

[0058] According to the above scheme, the design can divide SIB1 into multiple parts for transmission. The terminal can obtain the part of SIB1 needed by the terminal, thereby reducing unnecessary power consumption of the terminal and improving the terminal's energy efficiency.

[0059] In a sixth aspect, an information transmission method is provided, which can be executed by a sixth communication device, wherein the sixth communication device may be a network device or a module (such as a logic circuit, chip, or chip system) configurable in (or usable in) a network device.

[0060] The method includes: a network device sending a first synchronization signal, the first synchronization signal being used to determine a master information block. The master information block is used to determine time-frequency resources for transmitting a first portion of a first system information block, the first system information block further including a second portion, the time-frequency resources for transmitting the second portion being determined by at least one of the master information block or the first portion.

[0061] In conjunction with the fifth or sixth aspect, in certain implementations of the fifth or sixth aspect, the master information block is used to determine the time-frequency resources for transmitting a first portion of the first system information block, including: the master information block is used to determine the time-frequency resources for transmitting downlink control information, and the downlink control information is used to determine the time-frequency resources for transmitting the first portion. And / or, the time-frequency resources for transmitting the second portion are determined by at least one of the master information block or the first portion, including: the master information block is used to determine the time-frequency resources for transmitting downlink control information, and the time-frequency resources for transmitting the second portion are determined by at least one of the downlink control information or the first portion.

[0062] In conjunction with the fifth or sixth aspect, in some implementations of the fifth or sixth aspect, the time-domain interval between the time-domain resources of the first part and the time-domain resources of the second part is predefined. And / or, the frequency-domain interval between the frequency-domain resources of the first part and the frequency-domain resources of the second part is predefined.

[0063] According to the above scheme, the resource location relationships of different parts of SIB1 can be predefined without signaling indication, which can reduce signaling overhead.

[0064] In conjunction with the fifth or sixth aspect, in some implementations of the fifth or sixth aspect, the transmission periods of the first part and the second part are different. Alternatively, the transmission periods of the scheduling information used to schedule the first part and the scheduling information used to schedule the second part are different.

[0065] According to the above scheme, the transmission cycle of different parts can be set according to the priority and importance of the information contained in each part, and the transmission frequency can be designed as needed, which can improve the utilization rate of air interface resources.

[0066] In conjunction with the fifth or sixth aspect, in some implementations of the fifth or sixth aspect, the transmission period of the first part is shorter than the transmission period of the second part.

[0067] In conjunction with the fifth or sixth aspect, in some implementations of the fifth or sixth aspect, the second part includes at least one of the following: terminal access prohibition information, connection establishment failure control information, or non-critical extended information.

[0068] In conjunction with the fifth or sixth aspect, in some implementations of the fifth or sixth aspect, the second part of the first system information block further includes a third and a fourth part, wherein the third part includes first non-critical extended information and the fourth part includes second non-critical extended information. The information element versions corresponding to the first and second non-critical extended information are different.

[0069] According to the above scheme, the last field of the IE (Interface Name) for non-critical extension information in different versions is the extension field for different versions. Therefore, if there are subsequent versions of non-critical extensions, the content of the extension can be treated as a separate part of SIB1, and the network side can perform high-level packet assembly or encoding separately. In this way, when different versions of terminals need certain non-critical extension information, they can receive only the required part of SIB1 without having to decode all of SIB1.

[0070] In conjunction with the fifth or sixth aspect, in some implementations of the fifth or sixth aspect, the first part further includes at least one of the following: cell selection information, terminal access prohibition information, cell access related information, serving cell public configuration information, or connection establishment failure control information. This first part differs from some or all of the information contained in the second part.

[0071] In conjunction with the fifth or sixth aspect, in some implementations of the fifth or sixth aspect, the first part satisfies at least one of the following:

[0072] The length of the information in this first part is predefined;

[0073] The first part consists of N1 information fields, which are predefined.

[0074] In conjunction with the fifth or sixth aspect, in some implementations of the fifth or sixth aspect, the second part satisfies at least one of the following:

[0075] The length of the information in the second part is determined by the number of information fields contained in the second part;

[0076] The second part includes at least one optional information-carrying field.

[0077] A seventh aspect provides a communication device. In one design, the device may include modules corresponding to the methods / operations / steps / actions described in the first aspect or any embodiment of the first aspect. These modules may be hardware circuits, software, or a combination of hardware circuits and software. In one design, the device includes: a transceiver unit for receiving a first synchronization signal, the first synchronization signal being used to determine a master information block; and a processing unit for acquiring cell selection information, the master information block including the cell selection information, the cell selection information being used to determine whether to camp on a first cell.

[0078] Eighthly, a communication apparatus is provided. In one design, the apparatus may include modules corresponding to the methods / operations / steps / actions described in the second aspect or any embodiment of the second aspect. These modules may be hardware circuits, software, or a combination of hardware circuits and software. In one design, the apparatus includes a transceiver unit for transmitting a first synchronization signal, which is used to determine a master information block. The master information block includes cell selection information used to determine whether to camp on a first cell. Optionally, the apparatus further includes a processing unit for determining the first synchronization signal before transmitting it.

[0079] A ninth aspect provides a communication device. In one design, the device may include modules corresponding to the methods / operations / steps / actions described in the third aspect or any of the embodiments of the third aspect. These modules may be hardware circuits, software, or a combination of hardware circuits and software. In one design, the device includes: a transceiver unit for receiving a first synchronization signal, the first synchronization signal being used to determine a master information block; and a processing unit for acquiring inter-frequency cell frequency information, the master information block including the inter-frequency cell frequency information. Alternatively, the inter-frequency cell frequency information is carried on a first signal, and the time-frequency resources for transmitting the first signal are determined based on the master information block. The inter-frequency cell frequency information is used for monitoring a second synchronization signal, the frequency of which is different from the frequency of the first synchronization signal.

[0080] In a tenth aspect, a communication device is provided. In one design, the device may include modules corresponding to the methods / operations / steps / actions described in the fourth aspect or any embodiment of the fourth aspect. These modules may be hardware circuits, software, or a combination of hardware circuits and software. In one design, the device includes: a transceiver unit configured to transmit a first synchronization signal, the first synchronization signal being used to determine a master information block, wherein the master information block includes inter-frequency cell frequency information; or, the inter-frequency cell frequency information is carried on a first signal, and the time-frequency resources for transmitting the first signal are determined based on the master information block. Optionally, the device further includes a processing unit configured to determine the first synchronization signal before transmitting it.

[0081] Eleventhly, a communication device is provided. In one design, the device may include modules corresponding to the methods / operations / steps / actions described in the fifth aspect or any embodiment of the fifth aspect. These modules may be hardware circuits, software, or a combination of hardware circuits and software. In one design, the device includes: a receiving unit for receiving a first synchronization signal; and a processing unit for determining a master information block based on the first synchronization signal. The master information block is used to determine time-frequency resources for transmitting a first portion of a first system information block. The first system information block further includes a second portion, and the time-frequency resources for transmitting the second portion are determined by at least one of the master information block or the first portion.

[0082] In a twelfth aspect, a communication apparatus is provided. In one design, the apparatus may include modules corresponding to the methods / operations / steps / actions described in the sixth aspect or any embodiment of the sixth aspect. These modules may be hardware circuits, software, or a combination of hardware circuits and software. In one design, the apparatus includes a transceiver unit configured to transmit a first synchronization signal, which is used to determine a master information block. The master information block is used to determine time-frequency resources for transmitting a first portion of a first system information block. The first system information block further includes a second portion, the time-frequency resources for transmitting the second portion being determined by at least one of the master information block or the first portion. Optionally, the apparatus further includes a processing unit configured to determine the first synchronization signal before transmitting it.

[0083] In a thirteenth aspect, a communication device is provided, including a processor. The processor can implement the methods of the first to sixth aspects and any possible implementations thereof. Optionally, the communication device further includes a memory, and the processor is coupled to the memory and can be used to execute instructions in the memory to implement the methods of the first to sixth aspects and any possible implementations thereof. Optionally, the communication device further includes a communication interface, and the processor is coupled to the communication interface. In the embodiments of this application, the communication interface may be a transceiver, a pin, a circuit, a bus, a module, or other types of communication interface, and is not limited thereto.

[0084] In one implementation, the communication device is a communication equipment (such as a terminal device or access network equipment). When the communication device is a communication equipment, the communication interface can be a transceiver, or an input / output interface.

[0085] In another implementation, the communication device is a chip configured within a communication device. When the communication device is a chip configured within a communication device, the communication interface can be an input / output interface.

[0086] Optionally, the transceiver can be a transceiver circuit. Optionally, the input / output interface can be an input / output circuit.

[0087] In a fourteenth aspect, a processor is provided, comprising: an input circuit, an output circuit, and a processing circuit. The processing circuit is configured to receive signals through the input circuit and transmit signals through the output circuit, causing the processor to execute the methods described in the first to sixth aspects and any possible implementation thereof.

[0088] In specific implementation, the processor can be one or more chips, the input circuit can be input pins, the output circuit can be output pins, and the processing circuit can be transistors, gate circuits, flip-flops, and various logic circuits. The input signal received by the input circuit can be received and input by, for example, but not limited to, a receiver, and the signal output by the output circuit can be, for example, but not limited to, output to and transmitted by a transmitter. Furthermore, the input circuit and the output circuit can be the same circuit, which is used as both the input circuit and the output circuit at different times. This application does not limit the specific implementation of the processor and various circuits.

[0089] In a fifteenth aspect, a computer program product is provided, comprising: a computer program (also referred to as code or instructions) that, when run, causes a computer to perform the methods described in the first to sixth aspects and any possible implementation thereof.

[0090] In a sixteenth aspect, a computer-readable storage medium is provided that stores a computer program (also referred to as code or instructions) that, when run on a computer, causes the computer to perform the methods described in the first to sixth aspects and any possible implementation thereof.

[0091] In a seventeenth aspect, a chip system is provided, which is applied to an electronic device. The chip system includes one or more processors for invoking computer instructions to cause the electronic device to perform the methods described in the first to sixth aspects and any possible implementation thereof.

[0092] Eighteenth aspect: A communication system is provided, including at least one network device and at least one terminal as described above.

[0093] It should be understood that the beneficial effects of the features corresponding to the first aspect in the second to eighteenth aspects can be referred to the relevant description of the first aspect above, and will not be repeated here. Attached Figure Description

[0094] Figure 1 This is a schematic diagram of the architecture of the communication system provided in the embodiments of this application;

[0095] Figure 2 This is a schematic diagram of the SSB time-frequency structure provided in the embodiments of this application;

[0096] Figure 3 This is a schematic flowchart of an information transmission method provided in an embodiment of this application;

[0097] Figure 4This is a schematic flowchart of an information transmission method provided in an embodiment of this application;

[0098] Figure 5 This is a schematic diagram illustrating the determination of a second frequency point provided in an embodiment of this application;

[0099] Figure 6 This is a schematic flowchart of an information transmission method provided in an embodiment of this application;

[0100] Figure 7 This is a schematic diagram of the SIB provided in this application embodiment, which is divided into a first part and a second part;

[0101] Figure 8 This is a schematic block diagram of an example of a communication device provided in an embodiment of this application;

[0102] Figure 9 This is a schematic structural diagram of another example of the communication device provided in the embodiments of this application. Detailed Implementation

[0103] To facilitate understanding of the embodiments of this application, the following points will be explained first:

[0104] In this application, "instruction" can include direct instruction, indirect instruction, explicit instruction, and implicit instruction. When describing a certain instruction information for the purpose of instructing A, it can be understood that the instruction information carries A, directly instructs A, or indirectly instructs A.

[0105] In this application, " / " can indicate that the objects before and after are in an "or" relationship. For example, A / B can mean A or B. "And / or" can be used to describe three relationships between the related objects. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. A and B can be singular or plural.

[0106] In this application, "at least one" means one or more, and "more than one" means two or more, such as three, four, or more. Similar expressions (such as at least one, at least one, etc.) are used in the same way. "At least one of the following," "one or more of the following," or similar expressions refer to any combination of these items, which may include only a single item or a combination of multiple items. For example, at least one of a, b, or c can mean: a, or b, or c; a and b; or a and c; or b and c; or a, b, and c. Where a, b, and c can be single or multiple.

[0107] In this application, for the convenience of describing the technical solutions of the embodiments of this application, the terms "first" and "second" may be used to distinguish them. The terms "first" and "second" do not limit the quantity or execution order, and the terms "first" and "second" are not necessarily different.

[0108] In this application, the words "exemplary," "example," or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary," "example," or "for example" should not be construed as being more preferred or advantageous than other embodiments or designs. The use of the words "exemplary," "example," or "for example" is intended to present the relevant concepts in a specific manner to facilitate understanding.

[0109] In this application, "sending information / data" only indicates the direction of information / data transmission, including direct transmission via the device's communication interface (such as an air interface, or simply air interface). "Sending" can also be understood as the "output" of a module interface. "Sending" can include indirect transmission by the processing unit through the communication interface, meaning that after the processing unit outputs information / data through the module interface, it is transmitted to the device's communication interface and then sent out. "Receiving information / data" only indicates the direction of information / data transmission, including direct reception via the communication interface. "Receiving" can also be understood as the "input" of a module interface. "Receiving information / data" can include indirect reception by the processing unit through the communication interface, meaning that after the communication interface receives information / data, it is transmitted to the processing unit's module interface and then input to the processing unit. "Sending information / data to… (such as a terminal)" can be understood as the destination of the information being the terminal. It can include sending information / data directly or indirectly to the terminal. "Receiving information / data from… (such as a terminal)" can be understood as the source of the information being the terminal, and can include receiving information / data directly or indirectly from the terminal. Information / data may undergo necessary processing, such as format changes, between the source and destination, but the destination can understand the valid information / data from the source. Similar statements in this application can be understood in a similar way, and will not be repeated here.

[0110] The technical solutions of this application can be applied to various communication systems, such as Long Term Evolution (LTE) systems, 5th Generation (5G) communication systems, satellite communication systems, Wireless Fidelity (WiFi) systems, and the solutions provided in this application can also be applied to future communication systems or other communication systems. This application does not limit these applications.

[0111] Figure 1This is a schematic diagram of the architecture of a communication system applicable to the communication method provided in this application. Figure 1 A schematic diagram of a possible, non-limiting system architecture is shown. (e.g.) Figure 1 As shown, the communication system 100 includes a radio access network (RAN) 10 and a core network (CN) 20. Optionally, the communication system 100 also includes an Internet 30. RAN 10 includes at least one RAN node (e.g., Figure 1 110a and 110b (collectively referred to as 110) and at least one terminal (such as Figure 1 RAN 10, denoted as RAN 10 (120a-120j), may also include other RAN nodes, such as wireless relay devices and / or wireless backhaul devices. Figure 1 (Not shown in the image). Terminal 120 is connected to RAN node 110 wirelessly. RAN node 110 is connected to core network 20 wirelessly or via wired connection. The core network equipment in core network 20 and RAN node 110 in RAN 10 can be different physical devices, or they can be the same physical device integrating core network logical functions and radio access network logical functions.

[0112] RAN 10 can be a cellular system related to the 3rd Generation Partnership Project (3GPP), such as 4G, 5G mobile communication systems, or future-oriented evolution systems. RAN 10 can also be an open access network (O-RAN or ORAN), a cloud radio access network (CRAN), or a wireless fidelity (Wi-Fi) system. RAN 10 can also be a communication system that integrates two or more of the above systems.

[0113] RAN node 110, sometimes also referred to as access network equipment, RAN entity, or access node, is part of the communication system and is used to help terminals achieve wireless access. Multiple RAN nodes 110 in communication system 100 can be of the same type or different types. In some scenarios, the roles of RAN node 110 and terminal 120 are relative, for example... Figure 1 Network element 120i can be a helicopter or a drone, and it can be configured as a mobile base station. For terminals 120j that access RAN 10 through network element 120i, network element 120i is a base station; however, for base station 110a, network element 120i is a terminal. RAN node 110 and terminal 120 are sometimes referred to as communication devices, for example... Figure 1 Network elements 110a and 110b can be understood as communication devices with base station functions, while network elements 120a-120j can be understood as communication devices with terminal functions.

[0114] In one possible scenario, a RAN node can be a base station, an evolved NodeB (eNodeB), an access point (AP), a transmission reception point (TRP), a next-generation NodeB (gNB), a next-generation base station in a future mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system, etc. A RAN node can also be a macro base station (such as...) Figure 1 110a), micro base stations or indoor stations (such as Figure 1 In CRAN scenarios, RAN nodes can be 110b), relay nodes or donor nodes, or wireless controllers. Optionally, RAN nodes can also be servers, wearable devices, vehicles, or in-vehicle equipment. For example, in vehicle-to-everything (V2X) technology, the access network equipment can be a roadside unit (RSU).

[0115] In another possible scenario, multiple RAN nodes collaborate to assist the terminal in achieving wireless access, with different RAN nodes each implementing a portion of the base station's functions. For example, RAN nodes can be central units (CUs), distributed units (DUs), CU-control plane (CPs), CU-user plane (UPs), or radio units (RUs), etc. CUs and DUs can be set up separately or included in the same network element, such as a baseband unit (BBU). RUs can be included in radio frequency equipment or radio frequency units, such as remote radio units (RRUs), active antenna units (AAUs), or remote radio heads (RRHs).

[0116] In different systems, CU (or CU-CP and CU-UP), DU, or RU may have different names, but those skilled in the art will understand their meaning. For example, in an ORAN system, CU can also be called O-CU (open CU), DU can also be called O-DU, CU-CP can also be called O-CU-CP, CU-UP can also be called O-CU-UP, and RU can also be called O-RU. For ease of description, this application uses CU, CU-CP, CU-UP, DU, and RU as examples. Any of the units among CU (or CU-CP, CU-UP), DU, and RU in this application can be implemented through software modules, hardware modules, or a combination of software and hardware modules.

[0117] A terminal can also be called a terminal device, user equipment (UE), mobile station, mobile terminal, etc. Terminals can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (IoT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grids, smart furniture, smart offices, smart wearables, smart transportation, smart cities, etc. Terminals can be mobile phones, tablets, computers with wireless transceiver capabilities, wearable devices, vehicles, drones, helicopters, airplanes, ships, robots, robotic arms, smart home devices, etc.

[0118] In this application embodiment, the terminal and network device can be hardware devices, or software functions running on dedicated hardware, or software functions running on general-purpose hardware, such as virtualization functions instantiated on a platform (e.g., cloud platform), or entities that include dedicated or general-purpose hardware devices and software functions. This application does not limit the specific form of the terminal and network device.

[0119] To better understand the methods provided in the embodiments of this application, the terms involved in this application will be briefly explained below.

[0120] 1. Synchronization signal block (SSB)

[0121] The SSB is a core signal block in the initial access process of a terminal in 5G New Radio (NR), carrying very important functions such as carrying cell identifiers, time and frequency synchronization, and cell signal strength measurement. The SSB includes the primary synchronization signals (PSS), secondary synchronization signals (SSS), the physical broadcast channel (PBCH), and the demodulation reference signal (DMRS) of the PBCH. Figure 2 The time-frequency structure of SSB is shown, such as Figure 2 The SSB shown occupies four consecutive orthogonal frequency division multiplexing (OFDM) symbols in the time domain, numbered 0, 1, 2, and 3 respectively. In the frequency domain, the SSB occupies 20 consecutive resource blocks (RBs). Since each resource block contains 12 subcarrier resource elements (REs) in the frequency domain, the SSB occupies 240 subcarriers in the frequency domain, numbered k∈{0,1,2,…,239}.

[0122] like Figure 2 As shown, the PSS is located at positions 56-182 of the intermediate subcarriers on the time domain symbol l=0, meaning the PSS occupies 127 subcarriers in the frequency domain. The PSS is a physical layer-specific signal used for downlink frame synchronization and to provide radio frame boundaries. The PSS is a type of m-sequence, a special type of linear feedback shift register (LFSR) sequence, providing the longest non-repeating sequence. The PSS is an m-sequence of length 127, with a characteristic shift interval of 43, generating three PSS sequences corresponding to the periodic cyclic shift values ​​of the m-sequence: 0, 43, and 86, respectively. The PSS sequence is composed of d... PSS (n) represents the sequence index, where 0 ≤ n < 127. PSS The specific formula for generating (n) is as follows:

[0123] d PSS (n) = 1 - 2x(m)

[0124]

[0125] in, The identifier for PSS, according to The offset m can be calculated to generate three independent PSS sequences; x(m) represents the binary value (0 or 1) of sequence m. Specifically, the generator polynomial of x(m) can be expressed as:

[0126] x(i+7) = (x(i+4) + x(i)) mod 2

[0127] The initial state of the generator polynomial is: [x(6)x(5)x(4)x(3)x(2)x(1)x(0)]=[1 1 1 01 1 0]. Based on the initial state of the generator polynomial, any state value of x(m) can be calculated. For example, if we need to calculate the value of x(7), we can use the generator polynomial of x(m) x(7)=x(0+7)=(x(0+4)+x(0))mod 2, so we can get x(7)=(x(4)+x(0))mod 2=(1+0)mod 2=1, that is, x(7)=1. For example, if we need to calculate the value of x(10), we can use the generator polynomial of x(m) x(10)=x(3+7)=(x(3+4)+x(3))mod 2, so we can get x(10)=(x(7)+x(3))mod 2=(1+0)mod 2=1, that is, x(10)=1.

[0128] like Figure 2 As shown, the SSS is located at positions 56-182 in the middle subcarriers of time-domain symbol l=2, meaning the SSS occupies 127 subcarriers in the frequency domain. The SSS is also a physical layer-specific signal used to assist the terminal in completing radio frame synchronization and determining the time-frequency position of the SSB. Simultaneously, the SSS participates in the measurement of reference signal receiving power (RSRP) and supports coherent demodulation of the PBCH channel. The SSS is generated by XORing two 127-bit m-sequences (Gold sequences). When designing the SSS in 5G NR, the following characteristics need to be guaranteed:

[0129] 1) The correlation value with PSS should be as small as possible;

[0130] 2) Strong resistance to frequency deviation;

[0131] 3) The peak-to-average power ratio (PAPR) should be as low as possible;

[0132] 4) Low time-domain detection complexity.

[0133] Therefore, the specific method for generating SSS is as follows:

[0134] d SSS(n)=[1-2x0((n+m0)mod 127)][1-2x1((n+m1)mod 127)]

[0135]

[0136] Where 0≤n<127 represents the sequence index. This is the SSS identifier, used to distinguish the 336 cell groups. m0 and m1 are key parameters used to control the cyclic shift of the m-sequence. Specifically, m0 is determined by... and By jointly determining these values, the probability of incorrect physical cell identifier (PCID) detection can be reduced. x0 and x1 represent the binary values ​​(0 or 1) of the m-sequence; specifically, the generator polynomials of x0 and x1 can be expressed as:

[0137] x0(i+7)=(x0(i+4)+x0(i))mod 2

[0138] x1(i+7)=(x1(i+1)+x1(i))mod 2

[0139] The initial state of the generator polynomial of x0 is: [x0(6)x0(5)x0(4)x0(3)x0(2)x0(1)x0(0)]=[0 0 0 0 0 0 1]; the initial state of the generator polynomial of x1 is: [x1(6)x1(5)x1(4)x1(3)x1(2)x1(1)x1(0)]=[0 0 0 0 0 0 1]. Based on the initial state of the generator polynomial, any state value of x0 and x1 can be calculated. For example, to calculate the value of x0(7), using the generator polynomial of x0, x0(7)=x0(0+7)=(x0(0+4)+x0(0))mod 2, we can obtain x0(7)=(x0(4)+x0(0))mod 2=(0+1)mod 2=1, that is, x0(7)=1. For example, if we need to calculate the value of x1(7), we can use the generator polynomial of x1, x1(7) = x1(0+7) = (x1(0+1) + x1(0)) mod 2, so we can get x1(7) = (x1(1) + x1(0)) mod 2 = (0+1) mod 2 = 1, that is, x1(7) = 1.

[0140] PCID is an identifier used to uniquely identify a physical cell in a 5G network, identified by PSS. and SSS identifier The PCID value is determined to range from 0 to 1007, resulting in 1008 unique values. Terminals use the PCID to identify different cells and complete synchronization, access, and handover operations. The PCID is calculated as follows:

[0141]

[0142] in, For SSS identifier; This is the PSS identifier. The terminal obtains it by detecting the SSS. Detect PSS acquisition The PCID of the cell can be obtained. For example, when Then, it can be calculated that That is, the PCID of this cell is 910. The terminal obtains the PCID by parsing the PSS and SSS in the SSB, and completes the initial access and neighbor cell measurement. The PCIDs of adjacent cells with the same frequency must be different to avoid terminal access confusion.

[0143] After the terminal successfully detects PSS and SSS, it begins demodulating the PBCH signal. For example... Figure 2 As shown, the PBCH occupies all 240 subcarriers in time-domain symbols 1 and 3, as well as subcarrier numbers 0-47 and 192-239 in symbol 1=2. The PBCH carries system information and beam-related parameters and is the core module for initial access in the 5G NR physical layer.

[0144] Each RB on the PBCH channel contains the DMRS of three subcarriers, meaning the DMRS of the PBCH is located in the same time domain as the PBCH. In the frequency domain, to avoid DMRS interference between cells, 3GPP defines the PBCH DMRS as being determined based on the cell's PCID. Since there is no cell-specific reference signal (CRS) in NR, the DMRS is used for channel estimation so that the terminal can accurately demodulate the master information block (MIB) data carried in the PBCH based on the channel information obtained from the DMRS estimation. Therefore, to demodulate the PBCH signal, the terminal must first obtain the location of the PBCH DMRS.

[0145] Specifically, the resource locations allocated to PSS, SSS, PBCH, and DMRS of PBCH in SSB are shown in Table 1.

[0146] Table 1 shows the resource locations of PSS, SSS, PBCH, and DMRS allocations for PBCH in the SSB.

[0147]

[0148]

[0149] in, That is, v∈{0,1,2,3}, the position of DMRS in the frequency domain is determined by PCID modulo 4. Setting it to 0 emphasizes that the power is 0, that is, no transmission.

[0150] The MIB is transmitted via the PBCH in the SSB, carrying key parameters required for cell access, including the system frame number (SFN), subcarrier spacing (SCS), and cell prohibition information. It serves as the starting point for the terminal to obtain system information and directly affects subsequent channel demodulation and access procedures. The MIB is periodically broadcast via the PBCH and repeatedly transmitted within the period to improve reception reliability. In 5G NR, the total bit length of the MIB is 32 bits, of which higher-layer configuration messages occupy 24 bits after being encoded by the radio resource control (RRC) layer, and physical layer (layer 1, L1) configuration messages occupy 8 bits.

[0151] The 24 bits occupied by the higher-level configuration message of MIB are as follows:

[0152] System Frame Number (systemFrameNumber): Occupies 6 bits and is used to indicate the high 6 bits of the SFN, helping the terminal synchronize network time domain resources;

[0153] Common Subcarrier Spacing (SCS): Occupies 1 bit and is used to define the common subcarrier spacing. Optionally, it can be 15 / 60kHz or 30 / 120kHz, affecting the physical channel resource configuration. SCS determines some characteristics of the system's spectrum resource allocation and signal transmission; different subcarrier spacings are suitable for different scenarios and service requirements.

[0154] SSB Subcarrier Offset: Occupies 4 bits and specifies the offset of the SSB in the frequency domain, with a value ranging from 0 to 15. The SSB is used by the terminal for time and frequency synchronization and cell search operations.

[0155] DMRS Type A Position: Occupies 1 bit and is used to configure the starting symbol position of the DMRS for Physical Downlink Shared Channel (PDSCH) mapping type A. Optionally, this field can take the value pos2 or pos3. For example, when the parameter is set to pos2, the DMRS starts at symbol 2 of the time slot, which is suitable for scenarios that require advance acquisition of channel information. As another example, when the parameter is set to pos3, the DMRS starts at symbol 3 of the time slot, which may be used to reduce interference with other signals.

[0156] The physical downlink control channel configuration parameter (pdcch-ConfigSIB1) of system information block 1 occupies 8 bits and is used to configure the physical downlink control channel (PDCCH) resource information required by the terminal to decode system information block 1 (SIB1). Specifically, based on this parameter pdcch-ConfigSIB1, the terminal can determine the control resource set 0 (CORESET0) and the common search space (CSS) of type 0 PDCCH associated with SIB1, i.e., Type 0-PDCCH CSS. This enables the terminal to monitor the PDCCH, obtain the downlink control information (DCI) used to schedule SIB1, and obtain the scheduling information of SIB1 based on the DCI, such as the time and frequency resources, modulation scheme, and coding scheme of SIB1.

[0157] CellBarred Indicator: Occupies 1 bit and is used to determine whether access to the cell is prohibited. Optionally, this field can be set to either "barred" or "notbarred".

[0158] IntraFreqReselection: This field occupies 1 bit and refers to the process by which a terminal actively selects a better cell within the same frequency band based on changes in network signal quality. Optionally, this field can be set to either allowed or not allowed.

[0159] In addition, the MIB contains one spare bit, or reserved bit, for future expansion.

[0160] The 8 bits occupied by the L1 configuration message are as follows:

[0161] Half radio frame index: occupies 1 bit and indicates the half frame (0 or 1) to which the current SSB belongs;

[0162] The least significant bit (SFN LSB) of the system frame number occupies 4 bits and represents the lower 4 bits of the SFN. It is combined with the higher 6 bits of the system frame number in the higher-level configuration information to generate a complete 10-bit SFN value.

[0163] Frequency range: Occupying 3 bits, used to distinguish the physical characteristics and application scenarios of different frequency bands, it consists of two parts: frequency range 1 (FR1) and frequency range 2 (FR2). FR1 occupies 1 bit, and its frequency range is in the electromagnetic wave band below 6 GHz, with a frequency range of 450MHz to 7125MHz; FR2 occupies 3 bits, in the millimeter wave (mmWave) band defined in the 5G NR protocol, with a frequency range of 24.25GHz to 52.6GHz. For FR1, the SSB uses a 15kHz or 30kHz SCS; for FR2, the SSB uses a 60kHz or 120kHz SCS. FR2 occupies 2 more bits than FR1. The terminal determines whether the search frequency range is FR1 or FR2. When the frequency range is FR1, the useful bit information of L1 is 6 bits, of which 2 bits are redundant; when the frequency range is FR2, the useful bit information of L1 is 8 bits, with no redundant information.

[0164] 2. System Information Block (SIB)

[0165] In 5G NR, the SIB (System Information Block) is a key information unit broadcast by the base station to the terminal in the wireless communication system. It is used to transmit network configuration parameters, access control rules, and mobility management policies, supporting the terminal in completing cell access, reselection, and service connection. The SIB includes SIB1, SIB2, SIB3, ..., SIB25. After successfully decoding the MIB, the terminal can determine the search space and CORESET0 for monitoring the DCI (Distributed Cognitive Interface) based on the parameter pdcch-ConfigSIB1 in the MIB. Upon detecting the DCI, the terminal can obtain SIB1 based on that DCI. The scheduling information of other SIBs besides SIB1 is contained within SIB1 and is scheduled through periodic broadcasts or triggered by requests sent by the terminal. The following are the contents of each SIB:

[0166] SIB1 includes cell selection information, public land mobile network (PLMN), tracking area code (TAC), cell identifier, RAN notification information, system information (SI) other than SIB1, scheduling information, and serving cell information.

[0167] SIB1 is the core system information block parsed when a terminal accesses the network, containing key parameters such as basic cell configuration, scheduling rules, and access control. SIB4 is mainly used for neighbor cell configuration and parameter management for inter-frequency cell reselection. During the terminal's cell search and reselection process, SIB1 provides the terminal with access foundation and global scheduling rules to ensure that the terminal completes its initial camping and obtains subsequent system information. SIB4, on the other hand, accurately evaluates the cell through inter-frequency cell parameters, ensuring that the terminal can quickly switch to the best frequency cell, improving network access efficiency and mobility management performance.

[0168] The main parameters included in SIB1 are as follows:

[0169] 1) Cell Selection Information (cellSelectionInfo)

[0170] The community selection information includes relevant information used to determine whether one can reside in that community.

[0171] Minimum Received Signal Strength Threshold (q-RxLevMin): This field value indicates the minimum Received Signal Strength Ratio (RSRP) threshold allowed to camp on this cell. Actual value Q rxlevmin = Field value * 2, in dBm.

[0172] Minimum received signal strength threshold offset (q-RxLevMinOffset): is Q rxlevmin An offset, in dB, is used to adjust the minimum received signal strength threshold. This is taken into account in the serving cell received signal strength difference assessment (Srxlev assessment) after periodically searching for higher-priority PLMNs when the terminal is normally camped on a Visited PLMN (VPLMN). If this field is not present in SIB1, or if this parameter is not configured in SIB1, the terminal applies 0 dB as the default value for this offset.

[0173] Supplementary uplink (SUL) minimum received signal strength threshold (q-RxLevMinSUL): If the terminal supports SUL, Q is obtained from this field. rxlevmin Actual value Q rxlevmin= Field value * 2, in dBm.

[0174] Minimum Received Signal Quality Threshold (q-QualMin): This field value indicates the minimum received signal quality threshold Q required to camp on this cell. qualmin This signal quality can be the reference signal receiving quality (RSRQ), expressed in dB. If this field is not present, the terminal applies a negative infinity default value to q-QualMin, meaning that the cell's signal quality assessment will always pass, regardless of the received signal quality actually measured by the terminal.

[0175] Minimum Received Signal Quality Offset (q-QualMinOffset): is Q qualmin An offset, in dB, is used to adjust the minimum received signal quality threshold. This is considered in the cell selection quality assessment (Squal assessment) after periodic searches of higher-priority PLMNs when the terminal is normally camped on a VPLMN. If this field is not present, the terminal applies 0 dB as the default value for this offset.

[0176] Maximum Allowable Transmit Power (P-Max): Measured in dBm, this indicates the maximum radio frequency transmit power that the terminal is allowed to use when making uplink transmissions within the cell.

[0177] 2) Cell Access Related Information (cellAccessRelatedInfo)

[0178] Cell Reserved for Other Uses: Indicates whether the cell is reserved. This field applies to all PLMNs and identifies whether the cell is reserved for operator private networks, test networks, future expansion, or other non-public communication scenarios. If the cell is reserved, it cannot be camped except by specific terminals.

[0179] The Public Land Mobile Network Identifier List (plmn-IdentityList) is used to configure a set of PLMN identification information lists (PLMN-IdentityInfoList) elements. A PLMN is a mobile communication network established by an authorized operator to provide terrestrial mobile communication services to the public and interconnects with the public switched telephone network through infrastructure such as base stations and core networks. Each PLMN is uniquely identified by a combination of its Mobile Country Code (MCC) and Mobile Network Code (MNC). Each element in the PLMN-IdentityInfoList contains a list of one or more PLMN identities and other information related to these PLMNs, such as TAC, Radio Access Network Area Code (RANAC), and cell Identity.

[0180] 3) Connection Establishment Failure Control (connEstFailureControl): This parameter manages the policy for connection establishment failures during random access. When an RRC connection establishment fails due to factors such as deteriorating radio conditions or resource conflicts, this parameter activates the control logic. This parameter is a crucial component of radio resource management (RRM) for ensuring network stability. It mainly includes the following parameters:

[0181] Connection establishment failure count (connEstFailCount): Defines the maximum number of attempts a terminal can make to trigger access restrictions after consecutive RRC connection establishment failures.

[0182] Connection establishment failure denial duration offset (connEstFailOffset): Defines the duration of the access denial state after the terminal triggers access restrictions. This parameter extends the access denial timer (such as the T300 timer) by an offset value, controlling the waiting time after the terminal connection establishment fails.

[0183] RedirectInfo: When a terminal triggers a connection establishment failure restriction, it instructs the terminal to switch to other frequency bands or radio access technology (RAT) to alleviate current network congestion or optimize resource allocation.

[0184] 4) Internet Protocol Multimedia Subsystem (IMS) Emergency Support Instruction: IMS has special routing, priority processing and resource guarantee mechanisms for emergency calls (such as 110, 119, etc.) to ensure that users can still initiate emergency communication in abnormal states such as no SIM card, overdue payment or weak signal.

[0185] 5) IMS-based Emergency Call Support (eCallOverIMS-Support): This indicates whether the cell supports IMS emergency calls (eCall). In 5G networks, this function is configured through the ims-EmergencySupport parameter, indicating whether the cell supports IMS emergency services.

[0186] 6) Terminal Timers and Constants: Represents the timer parameters and fixed value configurations related to wireless connection management, used to control RRC connection, handover, retry and other processes.

[0187] 7) Universal Access Control Barring Info: User account control (UAC) barring information used to restrict random access requests in high-load scenarios.

[0188] 8) Use Full Resume ID: Terminal recovery ID indicator. This parameter is configured via RRC signaling and determines whether the terminal carries the full recovery ID when resuming the connection in order to quickly rebuild the context.

[0189] 9) SI Scheduling Information (si-SchedulingInfo): This parameter contains the information needed to obtain SI messages.

[0190] 10) Serving Cell Common Configuration (servingCellConfigCommon): Used to configure cell-level parameters of the terminal's serving cell, including core parameters obtained by the terminal from the SSB, MIB, or system information blocks (SIBs) when accessing the cell from an idle state. Through the servingCellConfigCommon parameter, the network provides this information in dedicated signaling when configuring a secondary cell (SCell) or secondary cell group (SCG) for the terminal. This parameter also provides this information for special cells (SpCells) during synchronous reconfiguration, such as the master cell group (MCG) and SCG. The following are some of the main configuration parameters included in servingCellConfigCommon:

[0191] Downlink ConfigCommon: This includes downlink frequency configuration, initial downlink bandwidth part (BWP), broadcast control channel (BCCH), and paging control channel (PCCH) configuration.

[0192] Uplink Common Parameter Configuration (uplinkConfigCommon): This includes uplink frequency point configuration, initial uplink BWP, and timing advance (TA).

[0193] SUL cell uplink common parameter configuration (supplementaryUplinkConfig): includes uplink frequency point configuration, initial uplink BWP and TA.

[0194] Serving Cell SSB Period (ssb-periodicityServingCell): A periodic parameter configured for the serving cell's SSB, used to control the SSB retransmission interval.

[0195] 11) Non-CriticalExtension: Used to support backward compatibility during protocol evolution. This field allows the network to provide additional configuration parameters or extended information to terminals supporting new functions without affecting the normal access of older terminals. According to 3GPP, non-CriticalExtensions are usually defined in a nested structure.

[0196] The `nonCriticalExtension` field of SIB1 contains the version 16.1.0 extension information element (SIB1-v1610-IEs), which in turn contains the parameter `nonCriticalExtension`. The `nonCriticalExtension` field of SIB1-v1610-IEs contains the version 16.3.0 extension information element (SIB1-v1630-IEs); the `nonCriticalExtension` field of SIB1-v1630-IEs also contains the parameter `nonCriticalExtension`, and the `nonCriticalExtension` field of SIB1-v1630-IEs contains the version 17.0.0 extension information element (SIB1-v17). The SIB1-v1700-IEs field also contains the parameter nonCriticalExtension, which contains the version 17.4.0 extension information element (SIB1-v1740-IEs); the SIB1-v1740-IEs field also contains the parameter nonCriticalExtension, which contains the version 18.0.0 extension information element (SIB1-v1800-IEs); the SIB1-v1800-IEs field also contains the parameter nonCriticalExtension.

[0197] The core function of `nonCriticalExtension` is to ensure that parameter extensions introduced by new protocol versions do not affect the normal operation of older terminals. When a protocol is upgraded, new parameters are added to the system information block through this field. Older terminals, unable to recognize these extensions, can directly ignore this field and only parse the basic parameters they support, thus ensuring that basic communication functions remain unaffected.

[0198] SIB2: Used for cell reselection information common to intra-frequency, inter-frequency and / or inter-system cells, as well as intra-frequency cell reselection information unrelated to neighboring cells.

[0199] SIB3: Contains neighbor cell information relevant only to intra-frequency cell reselection. This information element (IE) includes cells with specific reselection parameters and cells from the exclusion list.

[0200] SIB4: Contains inter-frequency cell reselection information, including other NR frequencies and inter-frequency neighboring cell information related to cell reselection. It can also be used for NR idle / inactive measurements. This IE includes frequency-common cell reselection parameters as well as cell-specific reselection parameters.

[0201] 1) InterFreqCarrierFreqList: This is a collection used to configure inter-frequency neighboring cell carrier frequencies and related cell reselection parameters. It contains information on multiple inter-frequency carrier frequencies and is a core field of SIB4.

[0202] 2) Inter-frequency carrier frequency information (InterFreqCarrierFreqInfo): This is the core data structure used to configure the carrier frequencies of inter-frequency neighboring cells and related cell reselection parameters. By defining the carrier frequency points and related rules of inter-frequency neighboring cells, it guides the terminal to perform inter-frequency measurements and reselection in idle or inactive states. Its core fields are as follows:

[0203] Downlink carrier frequency (dl-CarrierFreq): The carrier frequency that identifies neighboring cells of different frequencies, used by the terminal to measure and identify target frequencies.

[0204] Frequency Band List: Used to define a set of multiple frequency bands supported by a terminal or cell.

[0205] Supplementing the uplink frequency band list (frequencyBandListSUL): This parameter indicates the SUL frequency bands supported by the terminal. That is, in the Time Division Duplex (TDD) frequency band, the low frequency band is configured as uplink enhancement to solve the problem of insufficient uplink coverage in the high frequency band.

[0206] Number of SSBs to be averaged (nrofss-BlocksToAverage): This indicates the number of SSB measurements that the terminal needs to average when measuring neighboring cell signal quality. Averaging the measurements of multiple SSBs reduces the impact of instantaneous signal fluctuations and improves the accuracy of signal quality assessment.

[0207] SSB Consolidation Absolute Threshold (absThreshSS-BlocksConsolidation): This parameter determines whether the terminal combines the measurement results of multiple SSBs into a single composite value to improve the reliability of neighbor cell signal quality assessment. When the neighbor cell signal quality (RSRP / RSRQ) is higher than this threshold, the terminal will combine the measurement values ​​of multiple SSBs; if it is lower than the threshold, only the measurement result of a single SSB will be used.

[0208] SSB Measurement Timing Configuration (SMTC): Used to define the time window for the terminal to perform SSB measurements, including the measurement period, duration, and offset, in order to reduce terminal power consumption and optimize measurement efficiency.

[0209] SSB Subcarrier Spacing: Used to define the SSB subcarrier spacing, affecting the synchronization signal detection method.

[0210] SSB Measurement Bitmap (ssb-ToMeasure): This parameter defines the range of SSB indices that the terminal needs to measure within the SMTC window.

[0211] Cell-based SSB index derivation (deriveSSB-IndexFromCell): This parameter indicates whether the terminal derives the SSB index through the PCID, rather than directly measuring the SSB signal. In initial access or handover scenarios, if the terminal cannot directly detect the SSB, the location of the target cell's SSB resources can be quickly determined through the mapping relationship between the PCID and the SSB index.

[0212] Synchronization Signal Received Signal Strength Measurement (SSS-RSSI-Measurement): This parameter is used to instruct the terminal to measure the received signal strength indicator (RSSI) of the SSB in order to assess the overall signal quality and interference level of the cell.

[0213] Minimum Received Signal Strength Threshold (q-RxLeyMin): This threshold limits the signal strength required for a terminal to select or reselect neighboring cells. If the signal strength of a neighboring cell is lower than this threshold, the terminal will exclude that neighboring cell from the candidate cell list.

[0214] Minimum Received Signal Level (q-RxLevMin): The minimum RSRP requirement for a terminal to access a neighboring cell.

[0215] Minimum Received Signal Level (q-RxLevMinSUL) in the SUL band: The minimum received signal level required for the control terminal to perform cell selection or reselection in the SUL band.

[0216] Minimum signal quality threshold (q-QualMin): The minimum signal quality threshold for inter-frequency cell reselection, used to limit the minimum signal quality requirements that neighboring cells must meet when a terminal selects or reselects inter-frequency neighboring cells.

[0217] Maximum Allowable Transmit Power (p-Max): The maximum allowable transmit power limit for a terminal when selecting or reselecting inter-frequency neighboring cells. This parameter defines the maximum uplink transmit power value that the terminal is allowed to use in the target inter-frequency neighboring cell, and is used to control the terminal's transmit power to avoid interference with other cells or terminals.

[0218] NR Cell Reselection Time (t-ReselectionNR): This parameter represents the timing parameter for the terminal to perform cell reselection, and is used to control the waiting time before the reselection is triggered.

[0219] The scaling factor of the cell reselection timer (t-ReselectionNR-SF) is used to dynamically adjust the inter-frequency reselection time threshold based on the serving cell signal quality. The reselection waiting time is shortened when the serving cell signal quality is poor, and lengthened when it is good, to balance reselection speed and network stability.

[0220] High-priority threshold X (threshX-HighP): X represents the specific scenario type for which the threshold is applied. When the neighbor cell signal quality (RSRP / RSRQ) is higher than this threshold, the terminal may trigger a reselection or handover to a higher-priority neighbor cell.

[0221] Low priority threshold X (threshX-LowP): When the signal quality of the serving cell is lower than this threshold, the terminal initiates a measurement of low priority neighboring cells and may trigger a cell reselection.

[0222] Minimum signal quality threshold X (threshX-Q): Used to determine whether the terminal needs to initiate a measurement or reselection process for inter-frequency neighboring cells.

[0223] High-priority neighbor cell signal quality threshold X (threshX-HighQ): Used to determine whether the terminal meets the signal quality conditions for reselection to a high-priority inter-frequency neighbor cell.

[0224] Low-priority neighbor cell signal quality threshold X (threshX-LowQ): The signal quality condition used to determine whether a terminal is allowed to reselect to a low-priority inter-frequency neighbor cell.

[0225] Cell Reselection Priority: Defines the priority ranking of different frequency points or network standards when a terminal performs inter-frequency or inter-system cell reselection.

[0226] Cell Reselection SubPriority: Used to further refine the priority ranking among neighboring cells with the same primary priority, enabling more flexible network control.

[0227] Frequency offset (q-OffsetFreg): A correction value used to adjust the quality of measurement signals from neighboring frequency cells. The offset controls the terminal's priority perception of different frequencies.

[0228] InterFreaNeighCellList: A set of parameters used to configure interfrequency neighbor cell information, including parameters related to neighbor cell reselection at different frequencies from the current serving cell.

[0229] InterFregExcludedCellList: This is used to identify the set of target neighboring cells that terminals are prohibited from performing interFreg exclusivity selection. It is actively configured by the network side to prevent terminals from accessing specific cells.

[0230] SIB5: Contains information relevant only to inter-system cell reselection, namely Evolved Universal Terrestrial Radio Access (E-UTRA) frequencies and E-UTRA neighbor cell information related to cell reselection. This IE contains frequency-generalized cell reselection parameters.

[0231] SIB6: Contains key notifications from earthquake and tsunami warning systems.

[0232] SIB7: Includes Level 2 notifications for earthquake and tsunami warning systems.

[0233] SIB8: Includes Commercial Mobile Alert System (CMAS) notifications.

[0234] SIB9: Contains information related to Global Positioning System (GPS) time and Coordinated Universal Time (UTC). The UE can use the parameters provided in this system information block to obtain GPS, UTC, and local time.

[0235] SIB10: Contains the human readable network name (HRNN) of the non-public network (NPN) in SIB1.

[0236] SIB11: Contains information related to idle / inactive measurements.

[0237] SIB12: Includes NR sidelink (SL) communication / discovery configuration.

[0238] SIB13: Contains configuration for V2X SL communication.

[0239] SIB14: Includes configuration for V2X SL communication and can be used in conjunction with SIB13.

[0240] SIB15: Contains information related to disaster roaming.

[0241] SIB16: Contains slice-based cell reselection information.

[0242] SIB17: Includes configuration of tracking reference signal (TRS) resources for the UE in RRC idle / inactive states.

[0243] SIB17bis: Contains the configuration of TRS resources for the UE in the RRC idle / inactive state. If SIB17 is not scheduled, SIB17bis can be optionally scheduled.

[0244] SIBpos: Contains location assistance data.

[0245] SIB18: Contains group identifiers for network selection (GINs) to support access using credentials from the credential holder or to support terminal online.

[0246] SIB19: Contains satellite-aided information for access to non-terrestrial networks (NTN).

[0247] SIB20: Contains configuration information for obtaining the main control channel (MCCH) / multicast traffic channel (MTCH) of the multicast broadcast service (MBS).

[0248] SIB21: Contains the mapping between the current and / or adjacent carrier frequencies and the MBS frequency selection area identifier (FSAI).

[0249] SIB22: Contains ATG auxiliary information for air-to-ground (ATG) access.

[0250] SIB23: NR SL positioning configuration that includes a dedicated pool of sidelink positioning reference signals (SL-PRS).

[0251] SIB24: Contains the information required to configure the multicast MCCH / MTCH for obtaining MBS multicast reception in the RRC inactive state.

[0252] SIB25: Contains terrestrial network (TN) coverage information, used to assist in neighbor cell measurements for terminals in non-terrestrial network (NTN) cells.

[0253] 3. Cell search and synchronization

[0254] Cell search and synchronization are the first steps for a terminal to access the network. Upon power-on or handover, the terminal establishes time and frequency synchronization with the cell by detecting the SSB and obtaining the PCID, thus laying the foundation for subsequent network access. The terminal needs to scan potential frequency points using the synchronization raster to locate the SSB, perform sequence correlation calculations on the PSS and SSS within the SSB to obtain the PCID, and then use the PCID to determine the DMRS location.

[0255] The synchronization grid is a core technology in 5G NR used for terminals to quickly search for Service Buses (SSBs). Its design directly affects the efficiency and reliability of initial synchronization between the terminal and the base station. The synchronization grid is a specific frequency spacing rule followed by the terminal when searching for SSBs in the frequency domain. Essentially, it is a predefined set of frequency points representing the possible frequency locations of SSB signals. The synchronization grid uses a certain step size, such as 1.2MHz or 1.44MHz, to reduce the frequency range of blind SSB searches by the terminal, thereby reducing synchronization latency and power consumption. The synchronization grid is numbered using the Global Synchronization Channel Number (GSCN), with each number corresponding to a frequency point of an SSB. The higher the number, the higher the frequency location. The relationship between the synchronization grid and the GSCN is shown in Table 2.

[0256] Table 2. Correspondence between Synchronization Grids and GSCN

[0257]

[0258] The higher the frequency range, the larger the synchronization grid value. For a frequency range of 0–3000MHz, the synchronization grid is 1200kHz; for 3000–24250MHz, it is 1.44MHz; and for 24250–100000MHz, it is 17.28MHz. In the high-frequency range, 5G NR can deploy cells with larger channel bandwidths, thus requiring a larger synchronization grid to ensure that the terminal can quickly search for the SSB.

[0259] 4. Community Selection

[0260] Cell selection is a crucial step for terminals to complete network registration and service access, and it mainly involves the following two methods:

[0261] Method 1: Initial Cell Selection

[0262] This method is suitable for scenarios where the terminal lacks prior knowledge of the radio frequency (RF) channel in the NR band. Without stored information (such as historical frequency points or PLMN lists), the terminal autonomously searches for and selects a suitable cell for access based on a full-band scan of the synchronization grid. The specific process is as follows:

[0263] 1) The terminal scans all RF channels in the NR band to find a suitable cell based on its capabilities;

[0264] 2) At each frequency, the terminal only needs to search for the cell with the strongest signal, but for shared spectrum access scenarios, the terminal can continue to search for the cell with the second strongest signal.

[0265] 3) After finding a suitable cell, the terminal selects that cell.

[0266] Method 2: Cell selection based on stored information

[0267] This method is suitable for scenarios where the terminal has stored historical network information and optimizes access efficiency by reusing prior knowledge. The terminal utilizes historically stored information such as frequency points, PLMN priorities, and cell parameters to prioritize accessing known high-quality cells, reducing scanning time and power consumption. The specific process is as follows:

[0268] 1) This process requires storing frequency information, which comes from previously received measurement and control information or previously detected cell parameter information. The terminal uses the stored information to determine the feasibility of camping in a cell;

[0269] 2) Once the terminal finds a suitable cell, it should select that cell;

[0270] 3) If no suitable cell is found, for example, due to substandard signal quality or PLMN mismatch, the initial cell selection process of mode one should be initiated.

[0271] In the process of cell selection based on the above two methods, the priority between different frequencies or RATs provided to the terminal through system information or dedicated signaling is not used, that is, the terminal does not consider priority in the process of cell selection.

[0272] During the process of cell selection by the terminal, the suitability of a cell for access is determined by parameters such as cell signal strength and quality. It is necessary to determine whether the current cell meets the S criterion, that is, to perform a signal strength assessment Srxlev and a signal quality assessment Squal for the cell.

[0273] Among them, the cell signal strength assessment value Srxlev satisfies:

[0274] Srxlev=Q rxlevmeas –(Q rxlevmin +Q rxlevminoffset )–P compensation -Qoffset temp

[0275] Where Q in the above formula rxlevmeas The SSB is determined by the terminal measurement; other parameters are determined by the terminal based on SIB1. Specifically, Q... rxlevmeas It is the RSRP value of the cell obtained by measuring the synchronization signal at the terminal. Q rxlevmin This represents the minimum received power required for the cell, which is determined by the parameter q-Rxlevmin in SIB1. rxlevminoffset This represents the offset value, which is determined by the parameter q-RxLevMinOffset in SIB1. compensation This represents the power compensation value, which is determined by the parameter P-Max in SIB1. Qoffset temp This represents the offset temporarily applied to the cell, and the value is determined by the parameter connEstFailOffset in SIB1.

[0276] The cell signal quality assessment value Squal satisfies:

[0277] Squal = Q qualmeas -(Q qualmin +Q qualminoffset -Qoffset temp

[0278] Where Q in the above formula qualmeas The SSB is determined by the terminal measurement; other parameters are determined by the terminal based on SIB1. Q qualmeasThis represents the signal quality value of the cell obtained by measuring the synchronization signal at the terminal. Q qualmin This represents the minimum quality value required for the cell, which is determined by the parameter q-QualMin in SIB1. qualminoffset This represents the offset value, which is determined by the parameter q-QualMinOffset in SIB1.

[0279] When both Srxlev>0 and Squal>0 are satisfied, the S criterion is met, and the cell is deemed to meet the minimum communication guarantee requirements, triggering the subsequent access procedure. If either Srxlev>0 or Squal>0 is not satisfied, the S criterion is not met, and the terminal will exclude the cell from the search process.

[0280] The methods provided in the embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0281] As mentioned above, when a terminal performs initial cell selection, it needs to monitor the SSB. Furthermore, in order to access a cell, it will inevitably decode the MIB and SIB1. Based on the cell selection information in SIB1, the terminal determines whether the S criterion is met, thereby deciding whether to allow camping on that cell. As previously mentioned, SIB1 contains a large number of parameters, and decoding it requires significant terminal power consumption. The energy consumption of the terminal during network access can be 5-8 times that of normal standby mode.

[0282] To address the issue of reducing unnecessary power consumption by terminals during network access, this application proposes a solution where the MIB (Mobile Injection Block) can include cell selection information. This allows the terminal to obtain the cell selection information simply by decoding the MIB, and then determine whether camping on that cell is permitted based on the cell selection information. This design eliminates the need for the terminal to further read system information if it determines that camping on a cell is not allowed based on the cell selection information, thus reducing unnecessary power consumption. The following is a detailed explanation... Figure 3 A detailed introduction will be provided. Figure 3 This is a schematic flowchart of an information transmission method 300 provided in an embodiment of this application. The method 300 may include, but is not limited to, steps S310 to S320.

[0283] S310, the network device sends a first synchronization signal. Correspondingly, the terminal receives the first synchronization signal and determines the MIB based on the first synchronization signal.

[0284] The terminal can obtain the first synchronization signal by monitoring the synchronization signal at the frequency point of the first synchronization signal based on the synchronization grid. Alternatively, the terminal can obtain the first synchronization signal by monitoring the synchronization signal at the frequency point of the first synchronization signal based on other prior information (such as information obtained from other cells). This application does not limit the specific method by which the terminal receives the first synchronization signal.

[0285] In one implementation, the terminal can achieve time-frequency synchronization with the first cell based on the first synchronization signal, and the terminal determines the MIB based on the time-frequency synchronization.

[0286] For example, the terminal receiving the first synchronization signal may include: the terminal receiving an SSB, whereby the first synchronization signal includes a PSS, an SSS, and a PBCH. The MIB may be carried on the PBCH resource, and the MIB may include higher-level configuration messages such as the system frame number and L1 configuration messages such as the half-frame index. Specific SSBs can be found in the preceding description and will not be repeated here.

[0287] It should be understood that the synchronization signal and MIB may not be transmitted in the form of SSB. For example, the synchronization signal and MIB may be transmitted separately, or they may be transmitted in other forms. This can be redefined in subsequent versions of the standard protocol. Furthermore, the information contained in the MIB may be some or all of the information described above. This application does not limit this.

[0288] Optionally, the terminal may determine the identifier of the first cell based on the first synchronization signal.

[0289] For example, the first synchronization signal includes PSS and SSS. Based on the previous introduction, the terminal can determine the synchronization signal based on the identifier of PSS. and SSS identifier The identifier of the first cell is jointly determined. The terminal can then determine that the first synchronization signal originates from the first cell.

[0290] S320, the terminal obtains cell selection information. The MIB includes this cell selection information, which is used to determine whether to camp on the first cell.

[0291] After receiving the first synchronization signal and determining the MIB in S310, the terminal can obtain cell selection information from the MIB. Cell selection information can also be understood as information used by the terminal to determine whether to camp on the first cell. The cell selection information may include relevant information used by the terminal to determine whether it is able to camp on the first cell.

[0292] For example, the cell selection information may include signal strength-related parameters that allow the terminal to camp on the first cell, and the terminal may perform a signal quality assessment of the first cell based on these signal strength-related parameters. And / or, the cell selection information may include signal quality-related parameters that allow the terminal to camp on the cell, and the terminal may perform a signal quality assessment of the first cell based on these signal quality-related parameters. In other words, the cell selection information can be used by the terminal for signal strength assessment, or the cell selection information can be used by the terminal for signal quality assessment, or the cell selection information can be used for both signal strength assessment and signal quality assessment.

[0293] The terminal can determine whether the signal strength requirements for camping on the first cell are met by measuring the signal strength of the first synchronization signal and referring to the signal strength-related parameters provided in the cell selection information. If the signal strength requirements for camping on the first cell are not met, the terminal determines not to camp on the first cell. If the signal strength requirements for camping on the first cell are met, the terminal can further determine whether other camping conditions are met (if other camping conditions exist). The terminal can determine whether the signal quality requirements for camping on the first cell are met by measuring the signal quality of the first synchronization signal and comparing it with the signal quality-related parameters provided in the cell selection information. If the signal quality requirements for camping on the first cell are not met, the terminal determines not to camp on the first cell. If the signal quality requirements for camping on the first cell are met, the terminal can further determine whether other camping conditions are met (if other camping conditions exist).

[0294] For example, the cell selection information may specifically include at least one of the following: minimum received signal strength threshold, minimum received signal strength threshold offset, SUL minimum received signal strength threshold, minimum received signal quality threshold, minimum received signal quality threshold offset, or maximum allowed transmit power. The terminal can evaluate the signal strength of the first cell based on the signal strength (e.g., RSRP) obtained by measuring the first synchronization signal and the parameters provided by the cell selection information, obtaining a signal strength evaluation value for the first cell. For example, the signal strength evaluation value may be Srxlev as described above. If the signal strength evaluation value is greater than 0, the terminal determines that the signal strength requirement for camping on the first cell is met. If the signal strength evaluation value is less than or equal to 0, the terminal determines that the signal strength requirement for camping on the first cell is not met, and the terminal determines not to camp on the first cell. The terminal can also evaluate the signal quality of the first cell based on the signal quality (e.g., RSRQ) obtained by measuring the first synchronization signal and the parameters provided by the cell selection information, obtaining a signal quality evaluation value for the first cell. For example, the signal quality evaluation value may be Squal as described above. When the signal quality evaluation value is greater than 0, the terminal determines that the signal quality requirement for camping on the first cell is met. If the signal quality assessment value is less than or equal to 0, the terminal determines that it does not meet the signal quality requirements for camping in the first cell, and the terminal determines not to camp in the first cell.

[0295] Optionally, when the cell selection information includes only some of the parameters mentioned above, the other parameters may be predefined or indicated by other information, and this application embodiment does not limit this.

[0296] It should be understood that the above are merely examples, and the embodiments of this application do not limit how the terminal performs signal strength and signal quality assessments based on the parameters provided by the cell selection information; other assessment methods may also be used. Alternatively, the terminal may use other methods based on the cell selection information to determine whether it can camp on the first cell. The embodiments of this application do not limit this.

[0297] After detecting the synchronization signal (i.e., the first synchronization signal) of the first cell, the terminal obtains the MIB based on the first synchronization signal, from which cell selection information can be obtained. This allows the terminal to determine whether to camp on the first cell based on the cell selection information in the MIB. If the terminal determines that it cannot camp on the first cell based on the cell selection information, the terminal can abandon accessing the network from the first cell without needing to further obtain the SIB1 of the first cell. Compared to the current method where the terminal needs to decode a large amount of information in SIB1 after obtaining the MIB, this reduces unnecessary power consumption and improves terminal energy efficiency.

[0298] The method 300 described in this application embodiment allows the cell selection information, originally located in SIB1, to be moved to the MIB. The terminal can then obtain the cell selection information from the MIB to determine whether to camp on the first cell. In another alternative scheme, the cell selection information can be included in the DCI, and the time-frequency resources for transmitting the DCI are determined based on the MIB. The DCI also includes scheduling information from SIB1. The terminal can determine the MIB based on the first synchronization signal, and then determine the time-frequency resources for transmitting the DCI based on the MIB. The terminal can receive the DCI on these time-frequency resources, obtain the cell selection information based on the DCI, and thus determine whether to camp on the first cell.

[0299] To address the issue of reducing unnecessary power consumption during network access, this application proposes another solution: the terminal can obtain inter-frequency cell information in the first cell, which is used for monitoring synchronization signals in other cells. The inter-frequency cell information can be carried in the MIB or a first signal (the first signal can be SIB1), enabling the terminal to obtain the inter-frequency cell information promptly without further decoding other SIBs of the first cell, thus saving terminal power consumption. Furthermore, compared to the current method where, when a terminal determines it cannot camp on a cell, it searches for a cell at the next frequency point (which may not actually be a deployed cell) based on the synchronization grid, the terminal can now identify frequencies where synchronization signals exist based on the inter-frequency cell information, improving the efficiency of cell search and reducing unnecessary power consumption. The following is a related analysis... Figure 4 A detailed introduction will be provided.

[0300] Figure 4This is a schematic flowchart of an information transmission method 400 provided in an embodiment of this application. The method 400 may include, but is not limited to, steps S410 to S420.

[0301] S410, the network device sends a first synchronization signal. Correspondingly, the terminal receives the first synchronization signal and determines the MIB based on it.

[0302] Specifically, S410 can be implemented with reference to the previous introduction of S310, and will not be repeated here.

[0303] S420, the terminal obtains frequency information of inter-frequency cells.

[0304] The frequency information of the inter-frequency cell is used for monitoring the second synchronization signal, and the frequency of the second synchronization signal is different from that of the first synchronization signal.

[0305] Interfrequency cell information is used to indicate at least one frequency point that is different from the carrier frequency point of the first cell and has a synchronization signal (i.e., a cell is deployed). Alternatively, the at least one frequency point is different from the center frequency point of the first cell and / or different from the center frequency point of the first synchronization signal. Interfrequency cell information can also be called inter-frequency cell information, inter-frequency carrier frequency information, or inter-frequency carrier frequency information; the specific name of the interfrequency cell information is not limited in this application embodiment.

[0306] The frequency information of this inter-frequency cell can be indicated in the following two ways, including but not limited to:

[0307] Method 1: The frequency information of the inter-frequency cell includes at least one globally synchronized channel number (GSCN) or absolute radio frequency channel number (ARFCN) corresponding to a frequency point.

[0308] For example, inter-frequency cell frequency information may include an inter-frequency cell frequency list, which includes the GSCN or ARFCN corresponding to at least one frequency point. The terminal can determine the frequency point where the cell is deployed based on the channel number (such as GSCN or ARFCN) in the inter-frequency cell frequency information, avoiding blind searches and reducing terminal power consumption.

[0309] Optionally, the frequency information of the inter-frequency cell may also include at least one of the following:

[0310] Frequency domain bandwidth, synchronization signal frequency location, synchronization signal subcarrier spacing, synchronization signal measurement time configuration, cell reselection priority, or cell reselection sub-priority.

[0311] For example, in addition to frequency point information, the frequency information of inter-frequency cells can also include other frequency domain information, such as frequency domain bandwidth, synchronization signal frequency location, or synchronization signal subcarrier spacing, etc., at least one of these. This allows the terminal to obtain more frequency domain information about the inter-frequency cell and detect the synchronization signal as quickly as possible. This improves the efficiency of the terminal in monitoring the synchronization signal, and thus improves the efficiency of the terminal in accessing the network.

[0312] For example, the inter-frequency cell frequency information includes not only frequency point information but also the measurement time configuration of the synchronization signal. The inter-frequency cell frequency information may include the frequency point of the second synchronization signal or the frequency point of the second cell, where the second synchronization signal is the synchronization signal of the second cell. This inter-frequency cell frequency information may also include the measurement time configuration of the second synchronization signal. Based on this measurement time configuration, the terminal can determine the time period during which the second synchronization signal occurs. The terminal can monitor the second synchronization signal during this time period, avoiding monitoring during periods when the second synchronization signal will not occur, thereby further reducing terminal power consumption and improving terminal energy efficiency. For example, the measurement time configuration can configure at least one of the start time, duration, or period of the measurement time window for the second synchronization signal.

[0313] For example, the frequency information of the inter-frequency cell may also include at least one of cell reselection priority and sub-priority, so that the terminal can monitor the inter-frequency cell synchronization signal according to the priority.

[0314] It should be understood that the frequency information of inter-frequency cells may include some or all of the above-mentioned information, and the specific content of the inter-frequency cell frequency information can be determined according to specific implementation requirements. This application does not limit this.

[0315] Method 2: The inter-frequency cell frequency information can indicate at least one frequency domain offset, which includes the frequency domain offset between the first cell and the second cell; or, the frequency domain offset between the first synchronization signal and the second synchronization signal.

[0316] In one optional embodiment, the at least one frequency domain offset includes a frequency domain offset between a first frequency point and a second frequency point, wherein the first frequency point may be at least one of the center frequency point, the highest frequency point, or the lowest frequency point of the first cell, or the first frequency point may be at least one of the center frequency point, the highest frequency point, or the lowest frequency point of the first synchronization signal. The second frequency point may be at least one of the center frequency point, the highest frequency point, or the lowest frequency point of the second cell, or the second frequency point may be at least one of the center frequency point, the highest frequency point, or the lowest frequency point of the second synchronization signal.

[0317] For example, the at least one frequency domain offset may include the frequency domain offset between the center frequency of the first cell and the center frequency of the second cell, or the frequency domain offset between the highest frequency of the first cell and the highest frequency of the second cell, or the frequency domain offset between the lowest frequency of the first cell and the lowest frequency of the second cell. However, this application is not limited to these; it may also be the frequency domain offset between the highest frequency of the first cell and the lowest frequency of the second cell, or other offsets. Alternatively, the first cell in the above example may be replaced by a first synchronization signal, and the second cell may be replaced by a second synchronization signal.

[0318] The specific frequency offset can refer to the offset between different types of frequency points, which may be predefined by the protocol or indicated by the network device via signaling. This application does not limit this aspect.

[0319] Optionally, in this embodiment, the unit of the frequency offset indicated by the inter-frequency cell frequency information can be Hertz, subcarrier, subcarrier group, RE, RB, or RB group. For example, if a frequency offset includes N RBs, the inter-frequency cell frequency information can indicate N, and the terminal can determine that the frequency offset includes N RBs based on the unit of the frequency offset being RB.

[0320] The terminal can determine the second frequency point based on the first frequency point and the frequency domain offset, and thus monitor the second synchronization signal at the second frequency point. For example... Figure 5 As shown, the diagonal lines represent frequency points determined based on the synchronization grid. The terminal acquires inter-frequency cell frequency information from the first cell and can obtain the frequency domain offset of the second frequency point based on the first frequency point. This allows the terminal to detect the presence of a synchronization signal at the second frequency point and monitor that second synchronization signal. Furthermore, the terminal does not need to monitor the synchronization signal at the next frequency point after the first frequency point based on the synchronization grid, thus saving terminal power and improving energy efficiency.

[0321] In another alternative implementation, the frequency information of the inter-frequency cell can indirectly indicate the frequency domain offset by indicating the difference between the ARFCNs corresponding to the center frequencies of the two cells; or by indicating the difference between the GSCNs (or ARFCNs) corresponding to the center frequencies of the synchronization signals of the two cells.

[0322] The terminal can determine the corresponding channel number of the second cell based on the difference between the channel number indicated by the frequency information of the inter-frequency cell (such as ARFCN or GSCN) and the corresponding channel number of the first cell, and thus monitor the second synchronization signal based on the frequency point corresponding to the channel number.

[0323] In one optional implementation of Method 2, in addition to obtaining the frequency information of the inter-frequency cell, the terminal may also obtain the time information of the inter-frequency cell. The time information of the inter-frequency cell is used to indicate at least one time-domain offset, which includes the time-domain offset between the first synchronization signal and the second synchronization signal, and / or the time-domain offset between the first cell and the second cell.

[0324] For example, the time-domain offset indicated by the inter-frequency cell time information may include the time-domain offset between the first synchronization signal and the second synchronization signal. This can be understood as the time-domain offset between the start time, end time, or time unit of the first synchronization signal and the start time, end time, or time unit of the second synchronization signal. Based on the time-domain offset indicated by the inter-frequency cell time information, the terminal can determine the time range for monitoring the second synchronization signal, thus avoiding continuous monitoring of the second synchronization signal at the second frequency point and saving terminal power consumption.

[0325] For example, the time-domain offset indicated by the inter-frequency cell time information may include the time-domain offset between the first cell and the second cell. This time-domain offset can be understood as the time-domain offset between the radio frames of the two cells. The terminal can determine the radio frame timing of the second cell based on the radio frame timing of the first cell, thereby improving the efficiency of the terminal in monitoring the second synchronization signal based on the radio frame timing of the second cell.

[0326] Optionally, the unit of the inter-frequency cell time information indicating the time domain offset can be seconds, milliseconds, microseconds, OFDM symbol duration, OFDM symbol group duration, time slot, subframe, or frame. If a time domain offset includes M time slots, the inter-frequency cell time information can indicate M, and the terminal can determine that the time domain offset includes M time slots based on the unit of the time domain offset being time slots.

[0327] The terminal can monitor the second synchronization signal at the second frequency point within a corresponding time period based on the frequency and time information of the inter-frequency cell. This avoids unnecessary power consumption and improves the terminal's energy efficiency.

[0328] The above describes a specific implementation example of indicating at least one frequency point for inter-frequency cell frequency information. It should be noted that the terminal may need to obtain inter-frequency cell frequency information after powering on and performing a cell selection process, and after determining that the first cell cannot be camped, or the terminal may need to obtain inter-frequency cell frequency information when handover or cell reselection is required. This application embodiment does not limit the specific conditions under which the terminal obtains inter-frequency cell frequency information in the first cell. To enable the terminal to obtain inter-frequency cell frequency information as quickly as possible so that it can access the new cell as soon as possible, this application embodiment proposes that the inter-frequency cell frequency information can be carried in the MIB or the first signal, which will be described below.

[0329] In one implementation, the MIB includes inter-frequency cell frequency information.

[0330] When a terminal needs to obtain frequency information of a different frequency cell, it can obtain the frequency information of the different frequency cell from the MIB, which can avoid the terminal blindly searching and reduce the terminal power consumption.

[0331] In another implementation, the first signal includes inter-frequency cell frequency information, and the time-frequency resources for transmitting the first signal are determined according to the MIB.

[0332] Example 1: The MIB can indicate the time and frequency resources for transmitting the first signal. The terminal can directly determine the time and frequency resources of the first signal based on the MIB, thereby receiving the first signal on the time and frequency resources, and then obtaining the frequency information of the inter-frequency cell from the first signal.

[0333] For example, the first signal can be SIB1, or it can be a portion of SIB1. As another example, the first signal can be DCI, which can include inter-frequency cell frequency information and scheduling information related to system information, which can be SIB1.

[0334] Optionally, the terminal can also obtain inter-frequency cell time information from the first signal.

[0335] Example 2: The MIB can indicate the time-frequency resources for transmitting the DCI, which includes scheduling information for the first signal.

[0336] For example, the terminal can determine the control resource set (such as CORESET 0) for monitoring the PDCCH and the search space for monitoring the PDCCH based on the MIB. CORESET 0 defines the resource set for the PDCCH, and the search space defines the specific location and time slot of the PDCCH monitored by the terminal within CORESET 0. This allows the terminal to monitor the PDCCH on the correct time-domain and frequency-domain resources. The PDCCH carries a DCI containing scheduling information of a first signal. This scheduling information indicates the time-frequency resources used to carry the first signal. The terminal then receives the first signal on these time-frequency resources, thereby obtaining inter-frequency cell frequency information from the first signal. Optionally, the terminal can also obtain inter-frequency cell time information from the first signal.

[0337] For example, the first signal may be SIB1, or the first signal may be a portion of SIB1 or a part of SIB1.

[0338] Optionally, after obtaining the frequency information of the inter-frequency cell, the terminal can monitor the second synchronization signal based on the inter-frequency cell frequency information.

[0339] The terminal can determine the frequency point for monitoring the second synchronization signal based on the frequency information of the inter-frequency cell, and thus monitor the second synchronization signal at that frequency point.

[0340] Optionally, the terminal also acquires inter-frequency cell time information, and monitors the second synchronization signal based on the inter-frequency cell frequency information and inter-frequency cell time information. For details, please refer to the preceding description; further elaboration will not be repeated here.

[0341] According to the above scheme, the terminal can obtain inter-frequency cell information in the first cell, which is then used to monitor synchronization signals in other cells. Compared to the current method where, when the terminal determines it cannot camp on a cell, it searches for a cell at the next frequency point (which may not actually be a deployed cell) based on the synchronization grid, the terminal can identify the frequency point where synchronization signals exist based on the inter-frequency cell information. This improves the efficiency of the terminal's cell search and reduces unnecessary power consumption. The inter-frequency cell information can be carried in the MIB or the first signal (the first signal can be SIB1), enabling the terminal to obtain the inter-frequency cell information in a timely manner without further decoding of other SIBs in the first cell, thus saving terminal power consumption.

[0342] It should be noted that methods 300 and 400 described above can be implemented in combination. The terminal can receive a first synchronization signal, determine the MIB based on the first synchronization signal, and obtain cell selection information from the MIB. The terminal can determine whether to camp on the first cell based on the cell selection information. When the terminal needs to attempt to access the network from other cells, the terminal can obtain inter-frequency cell information from the first cell. This inter-frequency cell information is used for monitoring the second synchronization signal. This inter-frequency cell information can be carried in the MIB, or it can be carried in the first signal. The time-frequency resources for transmitting the first signal are determined based on the MIB. Specific implementations can be combined with the preceding descriptions of methods 300 and 400, and will not be elaborated further here.

[0343] The reason why a terminal needs to attempt to access the network from other cells could be that the terminal determines it cannot camp on the first cell based on cell selection information, or that the terminal determines it cannot camp on the first cell for other reasons. Alternatively, after camping on the first cell, the terminal may need to perform cell handover or cell reselection, thus requiring it to attempt to access the network from other cells. This application does not limit this to any particular reason.

[0344] To address the issue of reducing unnecessary power consumption during network access, specifically regarding the large amount of SIB1 information, which currently requires terminals to read during network access, resulting in significant power consumption, this application provides an alternative solution. This involves dividing the SIB1 into multiple parts for separate transmission, allowing the terminal to obtain only the required portion of the SIB1, thereby reducing unnecessary power consumption and improving terminal energy efficiency. The following describes a solution in conjunction with… Figure 6 A detailed introduction will be provided.

[0345] Figure 6 This is a schematic flowchart of an information transmission method 600 provided in an embodiment of this application. The method 600 includes, but is not limited to, steps S610 to S620.

[0346] S610, the network device sends a first synchronization signal. Correspondingly, the terminal receives the first synchronization signal.

[0347] Specifically, S610 can be implemented with reference to the previous introduction of S310, and will not be repeated here.

[0348] S620, the terminal determines the MIB based on the first synchronization signal, wherein the MIB is used to determine the time-frequency resources for transmitting the first part of the first system information block, the first system information block further includes a second part, and the time-frequency resources for transmitting the second part are determined by at least one of the MIB or the first part of the first system information block.

[0349] The first system information block may include multiple parts, such as at least a first part and a second part, where the first part and the second part contain some or all of the information. For example, the first system information block may be SIB1. Figure 7 As shown in the diagram, currently, the method on the left of the arrow is used, where the terminal reads the MIB and then obtains SIB1 based on the MIB. This application proposes using the method on the right of the arrow, dividing SIB1 into multiple parts, including a first part and a second part of SIB1, which the terminal can obtain as needed. By dividing the information-rich SIB1 into multiple parts, this application allows the terminal to first decode the first part and then decode other parts if necessary. This reduces unnecessary power consumption and improves terminal energy efficiency.

[0350] It should be understood that the first system information block can also have other names, and this application does not limit this. The following description takes SIB1 as the first system information block. The first part of SIB1 can be referred to as part1 of SIB1 or SIB1 part1, or the first part of SIB1 can be referred to as the first SIB1 and the second part of SIB1 can be referred to as the second SIB1. The other parts are similar, and the specific naming of each part is not limited in the embodiments of this application.

[0351] In one alternative implementation, the network device sends a first portion of a first system information block, and the network device may indicate whether to send other portions of the first system information block besides the first portion through a first indication message.

[0352] The network device can predefine the first part of the first system information block to be sent, while the other parts of the first system information block can be sent by the network device by notifying the terminal whether to send them through the first indication information.

[0353] Taking SIB1 as an example, SIB1 includes a first part and a second part. Based on protocol predefined definitions, the terminal determines that the network device must send the first part of SIB1. The terminal can receive first indication information sent by the network device. For example, the first indication information can be carried in the MIB. The first indication information can be 1 bit in the MIB, used to indicate whether the second part exists. When the 1 bit indicates 1, it means that the second part of SIB1 exists, i.e., the network device sends the second part. When the 1 bit indicates 0, it means that the second part of SIB1 does not exist, i.e., the network device does not send the second part. After receiving the MIB, the terminal can obtain the 1 bit of the first indication information in the MIB and determine whether the second part of SIB1 exists, i.e., whether the network device has sent the second part of SIB1, based on the first indication information.

[0354] For example, SIB1 includes a first part and multiple parts other than the first part. The first indication information can be multiple bits corresponding one-to-one with these multiple parts, or the first indication information can be a bitmap, such as one carried in a MIB. Multiple bits in this bitmap correspond one-to-one with the multiple parts of SIB1 other than the first part. One bit is used to indicate whether the corresponding part exists or not. The specific indication method can be referred to the indication method described in the previous paragraph, which uses 1 bit to indicate the existence of the second part, and will not be repeated here. If SIB1 includes a second part and a third part in addition to the first part, then the bitmap includes 2 bits, where the first bit can correspond to the second part and the second bit can correspond to the third part. If SIB1 includes 3 parts in addition to the first part, then the bitmap can include 3 bits corresponding one-to-one with each of the 3 parts.

[0355] The first instruction information may be carried in the MIB, or it may be carried in the first part, or it may be carried in other information. This application does not limit this.

[0356] In another alternative implementation, the network device may indicate whether to send each of the multiple parts of the first system information block via the second indication information.

[0357] Compared to the previous implementation, the first part may not necessarily exist; the network device may send or not send it, and notify the terminal through the second instruction information.

[0358] For example, the second indication information can be a bitmap. Referring to the previous description, if SIB1 includes a first part and a second part, the bitmap can include two bits corresponding to the first and second parts. If SIB1 includes a first part, a second part, and a third part, then the bitmap can include three bits corresponding to these three parts in SIB1. One bit is used to indicate whether the corresponding part exists or not.

[0359] In both of the above embodiments, if SIB1 contains only one part, then the scheduling information only needs to contain the time-frequency resources of that one part. When SIB1 is determined to contain both a first part and a second part, the scheduling information may contain only the time-frequency resources of the first part, or it may contain the time-frequency resources of both the first and second parts.

[0360] The following describes how the terminal determines the time-frequency resources for transmitting the first part of SIB1, and how it determines the time-frequency resources for transmitting the second part if the second part exists.

[0361] In one implementation, the time-frequency resources for transmitting the first and second parts of SIB1 are both determined based on MIB.

[0362] In other words, in this implementation, the MIB can indicate both the time-frequency resources of the first part of SIB1 and the time-frequency resources of the second part of SIB1. Correspondingly, the terminal can determine the time-frequency resources of both the first and second parts of SIB1 based on the MIB. The terminal can first receive the first part on the time-frequency resources of the first part, and then determine whether to receive the second part as needed. If the second part needs to be received, the terminal receives the second part on the time-frequency resources of the second part.

[0363] For example, the MIB uses different bits to indicate different portions of the time-frequency resources contained in SIB1. For instance, the MIB may use M bits (from the Nth bit to the (N+M-1)th bit) to indicate the first portion of the time-frequency resources, allowing the terminal to determine the time-frequency resources of the first portion using these M bits. Similarly, the MIB may include X bits (e.g., from the Kth bit to the (K+X-1)th bit) to indicate the second portion of the time-frequency resources, allowing the terminal to determine the time-frequency resources of the second portion using these X bits. Since the MIB uses different bits to indicate different portions of the time-frequency resources in SIB1, the terminal determines the time-frequency resources of different portions based on these different bits in the MIB. Optionally, in the MIB, the M bits used to determine the first portion of the time-frequency resources may precede the X bits used to determine the second portion of the time-frequency resources.

[0364] In another implementation, the MIB is used to determine the time-frequency resources for transmitting the DCI, and the DCI is used to determine the time-frequency resources for transmitting the first part. The time-frequency resources for the second part are determined by the first part.

[0365] Optionally, the MIB is used to determine the time-frequency resources for transmitting the first part of SIB1, including: the MIB is used to determine the time-frequency resources for transmitting DCI, and the DCI is used to determine the time-frequency resources for transmitting the first part. And / or, the time-frequency resources for transmitting the second part are determined by at least one of the MIB or the first part, including: the MIB is used to determine the time-frequency resources for transmitting DCI, and the time-frequency resources for transmitting the second part are determined by at least one of the DCI or the first part.

[0366] For example, a terminal can determine the time-frequency resources for transmitting a DCI based on a MIB. This DCI includes scheduling information in the first part. Based on this scheduling information, the terminal can determine the time-frequency resources for the first part and receive the first part of SIB1 on those time-frequency resources. This first part may include scheduling information in the second part. If it is necessary to receive the second part, the terminal can determine the time-frequency resources for the second part based on the scheduling information in the second part and receive the second part on those time-frequency resources.

[0367] In another implementation, the MIB is used to determine the time-frequency resources of the first part. The positional relationship between the time-domain resources of the first part and the time-domain resources of the second part can be predefined or indicated by the network device.

[0368] The time-domain interval between the first part of the time-domain resources and the second part of the time-domain resources is predefined. And / or, the frequency-domain interval between the first part of the frequency-domain resources and the second part of the frequency-domain resources is predefined.

[0369] In one example, the time-frequency resources of the first part and the time-frequency resources of the second part are continuous. For example, the time-domain interval is 0 or the frequency-domain interval is 0.

[0370] For example, the time-frequency resources of the first part can be predefined by the protocol, or the network device can indicate through signaling (such as the first part of the MIB or SIB) that the time-frequency resources of the second part are continuous in the time domain. When the terminal determines that the second part exists, it can determine that the time-frequency resources of the second part are continuous in the time domain with the time-frequency resources of the first part, and are located after the time-frequency resources of the first part.

[0371] For example, the time-frequency resources of the first part and the time-frequency resources of the second part may be frequency-domain contiguous, as predefined by the protocol or indicated by the network device (e.g., via MIB or SIB). If the time-frequency resources of the second part are frequency-domain higher or lower than the time-frequency resources of the first part, the terminal can determine the location of the time-frequency resources of the second part based on the time-frequency resources of the first part. In another example, the interval between the time-domain resources of the first part and the time-domain resources of the second part is a first time interval. And / or, the frequency-domain interval between the frequency-domain resources of the first part and the frequency-domain resources of the second part is a first frequency-domain interval.

[0372] Optionally, the first time interval and / or the first frequency domain interval may be predefined by the protocol, or indicated by the network device through signaling (such as the first part of the MIB or SIB). After obtaining the time-frequency resources of the first part, the terminal can determine the location of the time-frequency resources of the second part based on the time-frequency resources of the first part, the first time interval, and / or the first frequency domain interval.

[0373] Optionally, in the two examples above, the size of the time-frequency resources in the second part can be predefined by the protocol or determined based on predefined rules. For example, the predefined rules could be that the size of the time-frequency resources in the second part is the same as the size of the time-frequency resources in the first part, or that they satisfy a certain proportional relationship, etc., which are not limited in this embodiment of the application.

[0374] In another example, the terminal can receive the DCI based on the MIB and determine the time-frequency resources of the first part based on the DCI. If the terminal needs to receive the second part, it can determine that the frequency domain resources of the second part are the same as those of the first part, and determine the starting position of the time domain resources of the second part based on the time domain resources of the first part and a predefined first time interval. The time domain duration of the time domain resources of the second part can be predefined or indicated by the first part. Thus, the terminal can determine the time-frequency resources of the second part and receive the second part on those time-frequency resources. Alternatively, the time interval between the time domain resources of the first part and the time domain resources of the second part can be predefined by the protocol as the first time interval, and other information for determining the time-frequency resources of the second part is provided by the MIB or the first part.

[0375] For example, the time-frequency positional relationship between the second part of the time-domain resources and the first part of the time-frequency resources, as well as the size of the second part of the time-frequency resources, are predefined by the protocol. For instance, the time-domain interval and frequency-domain interval between the second and first parts, as well as the number of time-domain units and frequency-domain units contained in the time-frequency resources, can be predefined by the protocol. After the terminal determines the first part of the time-frequency resources based on DCI, it can determine the second part of the time-frequency resources based on the first part of the time-frequency resources and the predefined information.

[0376] It should be understood that the embodiments of this application are not limited to the above-described implementation methods. For example, the time-frequency positional relationship between the time-frequency resources of the second part and the time-frequency resources of the PBCH (or SSB) can also be predefined through the protocol, so that the terminal can determine the time-frequency resources of the second part based on the time-frequency resources of the PBCH (or SSB). Alternatively, other methods can be used to determine the time-frequency resources of the second part.

[0377] The above exemplifies how a terminal determines the time-frequency resources of multiple parts of SIB1. The following exemplifies the possible contents of each of the multiple parts of SIB1.

[0378] Optionally, the first part may include at least one of the following:

[0379] Terminal access prohibition information, cell access related information, service cell public configuration information, or connection establishment failure control information.

[0380] Optionally, the second part may include at least one of the following:

[0381] Terminal access prohibition information, cell access related information, serving cell public configuration information, connection establishment failure control information, or non-critical extended information.

[0382] In one optional implementation, the first part includes cell selection information and cell access prohibition information, and the second part includes cell access related information and serving cell public configuration information.

[0383] In this implementation, the information used by the terminal to determine whether it is allowed to camp on the cell is extracted from SIB1 as the first part. The terminal can first read the first part. If the cell access prohibition information in the first part indicates that the terminal access is prohibited, the terminal can determine that it cannot camp on the cell, and the terminal can stop receiving other parts of SIB1. Alternatively, after reading the first part, the terminal can determine that it cannot camp on the cell based on the cell selection information, and then the terminal can stop receiving other parts of SIB1. How the terminal determines that it cannot camp on the cell based on the cell selection information can be referred to the previous description, which will not be repeated here. If the terminal determines that it can be camped on the cell based on the first part, the terminal can further receive the second part of SIB1 to obtain the cell access-related information and serving cell common configuration information, so that the terminal can perform a random access procedure on the cell based on this information. This allows the terminal to avoid decoding a large amount of information in SIB1 when not necessary, saving terminal power consumption and improving terminal energy efficiency.

[0384] In this embodiment, the first and second parts may also include other information, which is not limited in this application embodiment.

[0385] In another optional implementation, the first part includes cell selection information, cell access prohibition information, cell access related information, serving cell public configuration information, and connection establishment failure control information. The second part includes non-critical extended information.

[0386] In this implementation, the terminal can first read the first part. Based on the cell selection information and cell access prohibition information in the first part, the terminal can determine whether it is allowed to camp on the cell. If it is allowed to camp on the cell, the terminal can further perform a random access procedure in the cell based on the cell access related information, serving cell common configuration information, and connection establishment failure control information in the first part, so as to access the network. The terminal can receive the second part to obtain non-critical extended information if needed.

[0387] Optionally, the first part satisfies at least one of the following:

[0388] The length of the first part is predefined, or the first part consists of N1 information fields, which are predefined.

[0389] In this optional approach, the information length of the first part of SIB1 can be fixed. For example, it can be predefined that the first part of SIB1 includes N2 bits. And / or, the number N1 information fields contained in the first part of SIB1 is fixed, and the specific N1 information fields are also predefined by the protocol. The terminal and network device reach a consensus on which information fields are specifically included in the first part of SIB1. For example, the N1 information fields may include information fields corresponding to cell selection information and information fields corresponding to cell access prohibition information. Optionally, the N1 information fields may also include information fields corresponding to other information.

[0390] Optionally, the second part satisfies at least one of the following:

[0391] The length of the information in the second part is determined by the number of information fields contained in the second part, or the second part includes at least one optional information field.

[0392] In this optional approach, the length of the second part is not fixed but determined by the information fields it actually contains. For example, the information fields that can be included in the second part can be defined through the protocol, and these fields can include mandatory and optional information fields. The second part of the SIB1 sent by the network device must include mandatory information fields. The network device can decide whether to include optional information fields in the second part. Therefore, the minimum length of the second part can be determined by the mandatory information fields. The minimum length of the second part is when it does not contain optional information fields, i.e., when it only contains mandatory information fields. The maximum length of the second part is the length when it includes all optional information fields except for the mandatory ones.

[0393] Optionally, the second part of SIB1 may specifically include a third part and a fourth part, the third part including a first non-critical extended information, and the fourth part including a second non-critical extended information, wherein the information element (IE) versions of the first non-critical extended information and the second non-critical extended information are different.

[0394] For example, the second part of SIB1 may include non-critical extension information (denoted as nonCriticalExtension), which can be further divided into a third part and a fourth part of SIB1. The third part may include first non-critical extension information, which may be the content of SIB1 IEs of version 16.1.0 (SIB1-v1610-IEs) excluding nonCriticalExtension (SIB1-v1630-IEs). The fourth part may include second non-critical extension information, which may be the content of SIB1 IEs of version 16.3.0 (SIB1-v1630-IEs) excluding nonCriticalExtension (SIB1-v1700-IEs).

[0395] Optionally, the multiple parts of SIB1 may also include a fifth and a sixth part, wherein the fifth part includes the contents of SIB1 IEs (SIB1-v1700-IEs) of version 17.0.0, excluding the nonCriticalExtension (SIB1-v1740-IEs). The sixth part includes the contents of SIB1 IEs (SIB1-v1740-IEs) of version 17.4.0, excluding the nonCriticalExtension (SIB1-v1800-IEs).

[0396] The last field, `nonCriticalExtension`, of the IE (Interface Name) for non-critical extension information varies between versions. Therefore, if subsequent versions of non-critical extensions exist, their content can be treated as a separate part of SIB1, allowing the network side to perform separate high-level packet assembly or encoding. This way, when different versions of terminals require certain non-critical extension information, they can receive only the necessary portion of the SIB1 without needing to decode the entire SIB1.

[0397] Optionally, at least two of the multiple parts of SIB1 have different transmission periods. Alternatively, at least two of the multiple parts of SIB1 have different transmission periods for their scheduling information.

[0398] For example, low-priority parameters (such as NTN configuration parameters) can be transmitted using discontinuous broadcasting, meaning network devices can send these parameters every N cycles. NTN configuration parameters are scenario-specific, requiring broadcasting only in specific areas or service scenarios (such as satellite coverage enhancement areas), and have a low update frequency. Using discontinuous broadcasting on demand to achieve discontinuous transmission can reduce air interface resource consumption.

[0399] For example, there is geographical differentiation: indoor cells do not broadcast NTN configuration parameters, and rural cells do not broadcast ultra-dense network parameters. NTN configuration parameters are suitable for satellite coverage areas, remote areas, or emergency communication scenarios. Satellite signals have poor penetration and coverage redundancy, therefore indoor cells do not broadcast NTN parameter configurations. Ultra-dense network parameters are suitable for urban hotspots and high-density user areas. Rural cells have low user density and sparse deployment, therefore rural cells do not broadcast ultra-dense network parameters.

[0400] For example, high-frequency cells do not broadcast low-frequency reselection parameters to reduce the risk of terminal misjudgment.

[0401] Based on the above description, the design divides SIB1 into multiple parts, each independently encoded, decoded, and transmitted. This allows the terminal to acquire and interpret one or more parts of SIB1 as needed, reducing power consumption during network access and improving terminal energy efficiency. It should be understood that the embodiments of this application are not limited to this. Similarly, to save terminal power consumption and enable the terminal to acquire required information on demand, other signaling can also be divided into multiple parts, each independently encoded, decoded, and transmitted.

[0402] In one example, a DCI can be divided into multiple parts, which can be independently encoded, decoded, and transmitted. Optionally, the multiple DCI parts may include a first DCI part and a second DCI part, wherein the information length of the first DCI part can be predefined (or fixed) and / or the number of information fields contained in the first DCI part is predefined. The information length of the second DCI part can vary depending on the number of information fields contained in the second DCI part.

[0403] In another example, an uplink control information (UCI) can be divided into multiple parts, which can be independently encoded, decoded, and transmitted. Optionally, these multiple UCI parts may include a first UCI part and a second UCI part, wherein the information length of the first UCI part can be predefined (or fixed) and / or the number of information fields contained in the first UCI part is predefined. The information length of the second UCI part can vary depending on the number of information fields contained in the second UCI part.

[0404] The above are merely examples, and the embodiments of this application are not limited to these. Other signaling such as MIB can also be divided into multiple parts. Optionally, the multiple parts may include parts with fixed information length and / or parts with variable information length.

[0405] This application also proposes another solution, which classifies the different SIBs (such as SIB1 to SIB25) introduced above to reduce the scheduling information of different SIBs, so that the terminal can receive SIBs in a targeted manner according to their categories, thereby reducing the power consumption of the terminal when receiving SIBs.

[0406] For example, different SIBs can be unified into one SIB according to their functions. SIB1 can be divided into multiple parts, referring to the design in Method 600 above.

[0407] Based on the preceding introduction to each SIB, SIB2, SIB3, SIB4, SIB5, and SIB16 all contain information related to cell reselection and can be unified into a single SIB module. This allows SIB1 (or a portion of SIB1) to include only one SIB for scheduling cell reselection-related information.

[0408] Alternatively, SIBs can be classified using at least one of the following classification methods.

[0409] SIB6, SIB7, SIB8, and SIB15 are all warning-related information and can be unified into one SIB.

[0410] SIB6, SIB7, and SIB8 are all warning-related information and can be unified into one SIB.

[0411] SIB9, SIB10, SIB18, SIB20, and SIB21 are less frequently used system information and can be unified into one SIB.

[0412] SIB11, SIB17, SIB17bis, and SIB24 are idle / inactive related information and can be unified into one SIB.

[0413] SIB12, SIB13, SIB14, and SIB23 are information related to the side walkway and can be unified into one SIB.

[0414] SIBpos, SIB19, SIB22, and SIB25 are auxiliary related information and can be unified into one SIB;

[0415] SIB19 contains NTN-related information and can be unified into one SIB.

[0416] Based on the above functional classification, at least 7 SIBs are required. Any newly added feature modules can be categorized in the same way. Each SIB module can uniformly handle packet assembly, modulation, and coding from the higher layers, reducing header overhead during packet assembly and improving transmission efficiency. This reduces the amount of scheduling information in SIB1, thus decreasing its information overhead. When a terminal needs specific information, it only needs to parse the corresponding SIB, reducing the terminal's power consumption when receiving SIBs. For example, when the signal quality of the cell the terminal is connected to is consistently below the minimum threshold, the terminal performs cell reselection. In this case, the terminal only needs to schedule and parse the SIBs related to cell reselection, without needing to schedule information from SIB2, SIB3, SIB4, SIB5, and SIB16 separately, reducing the terminal's receiving power consumption.

[0417] Optionally, each categorized SIB can be combined with the design of dividing SIB1 into multiple parts in method 600.

[0418] For example, for an SIB (denoted as SIBx) containing cell reselection information, the inter-frequency cell frequency information can be used as the first part of SIBx, and the remaining reselection information as the second part. Optionally, the scheduling information of the first part of this module can be included in SIB1, and the scheduling information of the second part of SIBx can be included in the first part of SIBx, or the time-frequency resources can be determined in a predefined manner, and other scheduling information is the same as the first part. Optionally, in this example, when the terminal detects that the cell cannot be camped, the terminal can read the scheduling information of SIBx in SIB1, obtain the first part of SIBx, and perform inter-frequency cell reselection based on the inter-frequency cell frequency information in the first part. This method, combined with dividing the SIB into different parts, can reduce the scheduling information of the SIB, further reduce the power consumption of terminal detection, and extend the terminal's usage time.

[0419] It is understood that, in order to achieve the functions in the above embodiments, the network devices and terminals include hardware structures and / or software modules corresponding to perform each function. Those skilled in the art should readily recognize that, based on the units and method steps described in conjunction with the embodiments disclosed in this application, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed by hardware or by computer software driving hardware depends on the specific application scenario and design constraints of the technical solution.

[0420] Figure 8 and Figure 9The diagram illustrates the possible structures of communication devices provided in embodiments of this application. These communication devices can be used to implement the functions of terminals or network devices in the above method embodiments, and thus also achieve the beneficial effects of the above method embodiments. In the embodiments of this application, the communication device may be as follows: Figure 1 One of the terminals 120a-120j shown can also be as follows: Figure 1 The network devices 110a or 110b shown can also be modules (such as chips or chip systems) applied to terminals or network devices.

[0421] The communication device 800 includes a transceiver unit 810, which can be used to receive or send information. The communication device 800 may also include a processing unit 820, which can be used to process instructions or data to achieve corresponding operations.

[0422] It should be understood that when the communication device 800 is a chip configured in (or used in) a communication device, the transceiver unit 810 in the communication device 800 can be the input / output interface or circuit of the chip, and the processing unit 820 in the communication device 800 can be the processor in the chip.

[0423] Optionally, the communication device 800 may further include a storage unit 830, which can be used to store instructions or data, and the processing unit 820 can execute the instructions or data stored in the storage unit to enable the communication device to perform corresponding operations.

[0424] The communication device 800 can be used to achieve the above. Figure 3 The method embodiments shown illustrate the functions of the terminal or network device.

[0425] When the communication device 800 is used to implement Figure 8 In the method embodiment shown, the terminal functions as follows: Transceiver unit 810 receives a first synchronization signal, which is used to determine a master information block. Processing unit 820 acquires cell selection information, which is included in the master information block and is used to determine whether to camp on a first cell.

[0426] When the communication device 800 is used to implement Figure 8 In the illustrated method embodiment, the network device functions as follows: a transceiver unit 810 is configured to transmit a first synchronization signal, which is used to determine a master information block. The master information block includes cell selection information used to determine whether to camp on a first cell. A processing unit 820 is configured to determine the first synchronization signal before transmitting it.

[0427] The communication device 800 can be used to achieve the above. Figure 4The method embodiments shown illustrate the functions of the terminal or network device.

[0428] When the communication device 800 is used to implement Figure 4 In the illustrated method embodiment, the terminal functions as follows: Transceiver unit 810 receives a first synchronization signal, which is used to determine a master information block. Processing unit 820 acquires inter-frequency cell frequency information, and the master information block includes this inter-frequency cell frequency information. Alternatively, the inter-frequency cell frequency information is carried on a first signal, and the time-frequency resources for transmitting the first signal are determined based on the master information block. The inter-frequency cell frequency information is used for monitoring a second synchronization signal, and the frequency of the second synchronization signal is different from the frequency of the first synchronization signal.

[0429] When the communication device 800 is used to implement Figure 4 In the illustrated method embodiment, the network device functions as follows: the transceiver unit 810 is used to send a first synchronization signal, which is used to determine a master information block, wherein the master information block includes inter-frequency cell frequency information; or, the inter-frequency cell frequency information is carried on a first signal, and the time-frequency resources for transmitting the first signal are determined based on the master information block. The processing unit 820 is used to determine the first synchronization signal before sending it.

[0430] The communication device 800 can be used to achieve the above. Figure 6 The method embodiments shown illustrate the functions of the terminal or network device.

[0431] When the communication device 800 is used to implement Figure 6 In the illustrated method embodiment, the terminal functions as follows: Transceiver unit 810 receives a first synchronization signal. Processing unit 820 determines a master information block based on the first synchronization signal. The master information block determines the time-frequency resources for transmitting a first portion of a first system information block. The first system information block also includes a second portion, and the time-frequency resources for transmitting the second portion are determined by at least one of the master information block or the first portion.

[0432] When the communication device 800 is used to implement Figure 6 In the illustrated method embodiment, the network device functions as follows: Transceiver unit 810 is used to send a first synchronization signal, which is used to determine a master information block. The master information block is used to determine the time-frequency resources for transmitting a first portion of a first system information block. The first system information block also includes a second portion, and the time-frequency resources for transmitting the second portion are determined by at least one of the master information block or the first portion. Processing unit 820 is used to determine the first synchronization signal before sending it.

[0433] For a more detailed description of the transceiver unit 810 and the processing unit 820 mentioned above, please refer to [link / reference]. Figure 3 , Figure 4 , Figure 6 The relevant descriptions in the method embodiments shown.

[0434] It should be understood that the transceiver unit 810 in the communication device 800 can be implemented through a communication interface (such as a transceiver, transceiver circuit, input / output interface, or pins, etc.). When the communication interface is a transceiver, the transceiver can consist of a receiver and / or a transmitter. The processing unit 820 in the communication device 800 can be implemented through at least one processor, or it can be implemented through at least one logic circuit. Optionally, the communication device 800 also includes a storage unit, which can be implemented using a memory.

[0435] like Figure 9 As shown, the communication device 900 includes a processor 910 and a communication interface 930. The processor 910 and the communication interface 930 are coupled to each other. It is understood that the communication interface 930 can be a transceiver or an input / output interface. Optionally, the communication device 900 may also include a memory 920 for storing instructions executed by the processor 910, or storing input data required by the processor 910 to execute instructions, or storing data generated after the processor 910 executes instructions.

[0436] In one implementation, the memory 920 may be integrated into the processor 910 or independent of the processor 910.

[0437] When the communication device 900 is used to achieve Figure 8 In the method shown, the processor 910 is used to implement the functions of the processing unit 820, and the communication interface 930 is used to implement the functions of the transceiver unit 810.

[0438] When the aforementioned communication device is a chip applied to a terminal device, the terminal device chip can implement the functions of the terminal in the above method embodiments. The terminal device chip receives information from other modules (such as an RF module or antenna) in the terminal device, the information being sent to the terminal device by the network device; or, the terminal device chip sends information to other modules (such as an RF module or antenna) in the terminal device, the information being sent to the network device by the terminal device.

[0439] When the aforementioned communication device is a module applied to a network device, the network device module can implement the functions of the network device in the above method embodiments. The network device module receives information from other modules (such as radio frequency modules or antennas) in the network device, which is information sent from the terminal device to the network device; or, the network device module sends information to other modules (such as radio frequency modules or antennas) in the network device, which is information sent from the network device to the terminal device. Here, the network device module can be the baseband chip of the network device, or it can be a DU or other modules. The DU here can be a DU under an open radio access network (O-RAN) architecture.

[0440] It is understood that the processor in the embodiments of this application can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), microprocessors (MPUs), microcontroller units (MCUs), graphics processing units (GPUs), artificial intelligence processors (AI processors), neural network processing units (NPUs), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. A general-purpose processor can be a microprocessor or any conventional processor.

[0441] The method steps in the embodiments of this application can be implemented in hardware or in software instructions executable by a processor. The software instructions can consist of corresponding software modules, which can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, registers, hard disks, portable hard disks, CD-ROMs, or any other form of storage medium known in the art. An exemplary storage medium is coupled to a processor, enabling the processor to read information from and write information to the storage medium. The storage medium can also be a component of the processor. The processor and storage medium can reside in an ASIC. Alternatively, the ASIC can reside in an access network device or a terminal device. The processor and storage medium can also exist as discrete components in the access network device or terminal device.

[0442] According to the method provided in the application embodiments, this application embodiment also provides a computer program product, the computer program product comprising: computer program code, which, when executed by one or more processors, causes a device including the processor to perform as described above. Figure 3 , Figure 4 , Figure 6 The method in the middle.

[0443] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. This computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of this application are performed, in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, network equipment, user equipment, or other programmable device.

[0444] According to the method provided in the embodiments of this application, the embodiments of this application also provide a computer-readable storage medium that stores the aforementioned computer program or instructions. When the computer program or instructions are executed by one or more processors, they cause a device including the processor to perform actions such as... Figure 3 , Figure 4 , Figure 6 The method in the middle.

[0445] As described above, computer programs or instructions can be stored in or transferred from one computer-readable storage medium to another. For example, the computer programs or instructions can be transferred from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium, such as a floppy disk, hard disk, or magnetic tape; it can also be an optical medium, such as a digital video optical disc; or it can be a semiconductor medium, such as a solid-state drive. The computer-readable storage medium can be a volatile or non-volatile storage medium, or it can include both volatile and non-volatile types of storage media.

[0446] According to the method provided in the embodiments of this application, this application also provides a communication system, including one or more of the aforementioned terminals. The system may further include one or more of the aforementioned network devices.

[0447] In the various embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus described above is merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0448] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this solution according to actual needs.

[0449] In the various embodiments of this application, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions of different embodiments are consistent and can be referenced by each other. The technical features of different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0450] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An information transmission method, characterized in that, include: Receive a first synchronization signal, which is used to determine the main information block; Obtain cell selection information. The main information block includes the cell selection information, which is used to determine whether to camp on the first cell.

2. The method according to claim 1, characterized in that, The method further includes: The method involves acquiring inter-frequency cell frequency information, wherein the main information block includes the inter-frequency cell frequency information; or, the inter-frequency cell frequency information is carried on a first signal, and the time-frequency resources for transmitting the first signal are determined based on the main information block. The frequency information of the inter-frequency cell is used for monitoring the second synchronization signal, and the frequency point of the second synchronization signal is different from that of the first synchronization signal.

3. An information transmission method, characterized in that, include: Receive a first synchronization signal, which is used to determine the main information block; Obtain inter-frequency cell frequency information, wherein the main information block includes the inter-frequency cell frequency information; Alternatively, the frequency information of the inter-frequency cell is carried on the first signal, and the time-frequency resources for transmitting the first signal are determined based on the main information block. The frequency information of the inter-frequency cell is used for monitoring the second synchronization signal, and the frequency point of the second synchronization signal is different from that of the first synchronization signal.

4. The method according to claim 3, characterized in that, The main information block also includes cell selection information, which is used to determine whether to camp on the first cell.

5. The method according to any one of claims 2 to 4, characterized in that, The frequency information of the inter-frequency cell includes at least one of the following: At least one cell's carrier frequency, frequency domain bandwidth, synchronization block frequency location, synchronization block subcarrier spacing, synchronization block measurement time configuration, cell reselection priority, or cell reselection sub-priority; or, The inter-frequency cell frequency information includes at least one frequency domain offset, and the at least one frequency domain offset includes at least one of the following: The frequency domain offset between the center frequency of the first cell and the center frequency of the second cell; or The frequency domain offset between the center frequency of the first synchronization signal and the center frequency of the second synchronization signal.

6. The method according to claim 5, characterized in that, The inter-frequency cell frequency information includes at least one frequency domain offset, and the method further includes: Obtain inter-frequency cell time information, wherein the main information block includes the inter-frequency cell time information; or, the inter-frequency cell time information is carried on the first signal; The inter-frequency cell time information is used for monitoring the second synchronization signal.

7. The method according to claim 6, characterized in that, The inter-frequency cell time information includes at least one time-domain offset, and the at least one time-domain offset includes at least one of the following: The time-domain offset between the first synchronization signal and the second synchronization signal; or The time-domain offset between the first cell and the second cell.

8. The method according to any one of claims 2 to 7, characterized in that, The first signal is downlink control information.

9. The method according to claim 8, characterized in that, The downlink control information includes the scheduling information of the first system information block.

10. The method according to any one of claims 2 to 7, characterized in that, The first signal is a first system information block, which includes the frequency information of the inter-frequency cell; or, the first system information block includes the inter-frequency cell frequency information and the inter-frequency cell time information, wherein the inter-frequency cell time information is used for monitoring the second synchronization signal.

11. The method according to claim 9 or 10, characterized in that, The first system information block includes at least one of the following: Terminal access prohibition information, cell access related information, serving cell public configuration information, connection establishment failure control information, or non-critical extended information.

12. An information transmission method, characterized in that, include: Receive the first synchronization signal; Based on the first synchronization signal, determine the main information block. The main information block is used to determine the time-frequency resources for transmitting a first part of the first system information block. The first system information block also includes a second part, and the time-frequency resources for transmitting the second part are determined by at least one of the main information block or the first part.

13. An information transmission method, characterized in that, include: Send a first synchronization signal, which is used to determine the master information block. The main information block is used to determine the time-frequency resources for transmitting a first part of the first system information block. The first system information block also includes a second part, and the time-frequency resources for transmitting the second part are determined by at least one of the main information block or the first part.

14. The method according to claim 12 or 13, characterized in that, The master information block is used to determine the time-frequency resources for transmitting the first part of the first system information block, including: the master information block is used to determine the time-frequency resources for transmitting downlink control information, and the downlink control information is used to determine the time-frequency resources for transmitting the first part; and / or, The time-frequency resources for transmitting the second part are determined by at least one of the main information block or the first part, including: the main information block is used to determine the time-frequency resources for transmitting downlink control information, and the time-frequency resources for transmitting the second part are determined by at least one of the downlink control information or the first part.

15. The method according to any one of claims 12 to 14, characterized in that, The time-domain interval between the first part of the time-domain resources and the second part of the time-domain resources is predefined; and / or, The frequency domain spacing between the first part of the frequency domain resources and the second part of the frequency domain resources is predefined.

16. The method according to any one of claims 12 to 15, characterized in that, The transmission periods of the first part and the second part are different; or, The transmission period for the scheduling information used to schedule the first part is different from that used to schedule the second part.

17. The method according to any one of claims 12 to 16, characterized in that, The transmission period of the first part is shorter than the transmission period of the second part.

18. The method according to any one of claims 12 to 17, characterized in that, The second part includes at least one of the following: Terminal access prohibition information, connection establishment failure control information, or non-critical extended information.

19. The method according to any one of claims 12 to 18, characterized in that, The second part of the first system information block further includes a third part and a fourth part, wherein the third part includes first non-critical extended information, and the fourth part includes second non-critical extended information. The information element versions corresponding to the first non-critical extended information and the second non-critical extended information are different.

20. The method according to any one of claims 12 to 19, characterized in that, The first part also includes at least one of the following: Cell selection information, terminal access prohibition information, cell access related information, public configuration information of serving cell, or connection establishment failure control information. The first part contains some or all of the information that differs from the second part.

21. The method according to any one of claims 12 to 20, characterized in that, The first part satisfies at least one of the following: The length of the information in the first part is predefined; The first part consists of N1 information fields, which are predefined.

22. The method according to any one of claims 12 to 21, characterized in that, The second part satisfies at least one of the following: The information length of the second part is determined by the number of information fields contained in the second part; The second part includes at least one optional information-carrying field.

23. A communication device, characterized in that, The device includes a processor coupled to a memory for storing a computer program, the processor for executing the computer program stored in the memory to cause the communication device to perform the method as described in any one of claims 1 to 22.

24. A communication device, characterized in that, It includes a processor and a communication interface, the processor being used to control the communication interface to implement the method as described in any one of claims 1 to 22.

25. A computer-readable storage medium, characterized in that, The computer stores instructions that, when executed on the computer, cause the computer to perform the method as described in any one of claims 1 to 22.

26. A computer program product, characterized in that, The computer program product includes: a computer program that, when run, causes a computer to perform the method of any one of claims 1 to 22.

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