Information receiving method, information sending method, apparatus, terminal and network side device

Abstract

The application discloses an information receiving method, an information sending method, apparatuses, a terminal and a network side device, and belongs to the technical field of communication. The information receiving method comprises the following steps: a first terminal monitors a paging message on a first carrier, wherein the first carrier is determined based on first system information received by the first terminal on a second carrier; in the case of system information change, the first terminal monitors the paging message and the changed system information on the first carrier; or in the case of system information change, the first terminal monitors the paging message and the changed system information on the second carrier; wherein the first carrier and the second carrier are both downlink carriers of a first cell.

Description

Technical Field

[0001] This application belongs to the field of communication technology, specifically relating to an information receiving method, an information sending method, an apparatus, a terminal, and a network-side device. Background Technology

[0002] Related technologies have introduced multi-downlink carrier cells, which refer to cells with multiple downlink carriers. However, when a cell has multiple downlink carriers, the cell will transmit system information and paging messages to terminals on multiple downlink carriers, resulting in significant radio resource overhead from transmitting system information and paging messages. Summary of the Invention

[0003] This application provides an information receiving method, an information sending method, an apparatus, a terminal, and a network-side device, which can solve the problem of high wireless resource overhead in the transmission of system information and paging messages.

[0004] Firstly, an information receiving method is provided, the method comprising:

[0005] The first terminal listens for paging messages on the first carrier, and the first carrier is determined based on the first system information received by the first terminal on the second carrier.

[0006] In the event of a change in system information, the first terminal listens for the paging message and the changed system information on the first carrier; or, in the event of a change in system information, the first terminal listens for the paging message and the changed system information on the second carrier.

[0007] Wherein, both the first carrier and the second carrier are downlink carriers of the first cell.

[0008] Secondly, a method for sending information is provided, the method comprising:

[0009] The network-side equipment transmits system information on the second carrier and a paging message to the first terminal on the first carrier;

[0010] In the event of a change in system information, the network-side device transmits the changed system information and a paging message to the first terminal on the first carrier; or, in the event of a change in system information, the network-side device transmits the changed system information and a paging message to the first terminal on the second carrier.

[0011] The network-side device is the network-side device corresponding to the first cell, and both the first carrier and the second carrier are downlink carriers of the first cell.

[0012] Thirdly, an information receiving device is provided, comprising:

[0013] The processing module is used to listen for paging messages on the first carrier, which is determined based on the first system information received by the first terminal on the second carrier.

[0014] The processing module is further configured to: listen to the paging message and the changed system information on the first carrier when the system information changes; or, listen to the paging message and the changed system information on the second carrier when the system information changes.

[0015] Wherein, both the first carrier and the second carrier are downlink carriers of the first cell.

[0016] Fourthly, an information transmission device is provided, comprising:

[0017] The transmitting module is used to transmit system information on the second carrier and to transmit paging messages to the first terminal on the first carrier.

[0018] The transmitting module is further configured to: transmit the modified system information and the paging message to the first terminal on the first carrier when the system information changes; or, transmit the modified system information and the paging message to the first terminal on the second carrier when the system information changes.

[0019] The information receiving device is the information receiving device corresponding to the first cell, and the first carrier and the second carrier are both downlink carriers of the first cell.

[0020] Fifthly, an information receiving device and / or an information transmitting device are provided, the information receiving device being configured to perform the steps of the method described in the first aspect, and / or the information transmitting device being configured to perform the steps of the method described in the second aspect.

[0021] In a sixth aspect, a terminal is provided, the terminal being a first terminal, the first terminal including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the first aspect.

[0022] In a seventh aspect, a terminal is provided, said terminal being a first terminal, comprising a processor and a communication interface, wherein,

[0023] A processor is configured to listen for paging messages on a first carrier, the first carrier being determined based on first system information received by the first terminal on a second carrier.

[0024] The processor is further configured to: listen to the paging message and the changed system information on the first carrier when the system information changes; or, listen to the paging message and the changed system information on the second carrier when the system information changes.

[0025] Wherein, both the first carrier and the second carrier are downlink carriers of the first cell.

[0026] Eighthly, a network-side device is provided, the network-side device including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the second aspect.

[0027] Ninthly, a network-side device is provided, including a processor and a communication interface, wherein,

[0028] A communication interface is used to transmit system information on the second carrier and to transmit paging messages to the first terminal on the first carrier.

[0029] The transmitting module is further configured to: transmit the modified system information and the paging message to the first terminal on the first carrier when the system information changes; or, transmit the modified system information and the paging message to the first terminal on the second carrier when the system information changes.

[0030] The network-side device is the network-side device corresponding to the first cell, and both the first carrier and the second carrier are downlink carriers of the first cell.

[0031] In a tenth aspect, a readable storage medium is provided, on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect, or implement the steps of the method described in the second aspect.

[0032] Eleventhly, a wireless communication system is provided, comprising: a first terminal and a network-side device, wherein the first terminal can be used to perform the steps of the method as described in the first aspect, and the network-side device can be used to perform the steps of the method as described in the second aspect.

[0033] In a twelfth aspect, a chip is provided, the chip including a processor and a communication interface coupled to the processor, the processor being configured to run a program or instructions to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0034] In a thirteenth aspect, a computer program / program product is provided, which is stored in a storage medium and is executed by at least one processor to implement the method as described in the first aspect, or to implement the method as described in the second aspect.

[0035] In this embodiment, the first terminal listens for paging messages on the first carrier. When system information changes, the first terminal listens for both the paging message and the changed system information on the first carrier. This allows the network-side device corresponding to the first cell to send paging messages to the first terminal only on the first carrier in both the first and second carriers, reducing the radio resource overhead of paging message transmission. Furthermore, the first terminal can continue listening for paging messages on the first carrier, reducing the probability of the first terminal missing a paging call. Alternatively, the first terminal listens for paging messages on the first carrier. When system information changes, the first terminal listens for both the paging message and the changed system information on the second carrier. This allows the network-side device corresponding to the first cell to send the changed system information and paging messages to the first terminal only on the second carrier in both the first and second carriers, reducing the radio resource overhead of system information and paging message transmission. Moreover, by listening for paging messages on the second carrier, the probability of the first terminal missing a paging call is reduced. Attached Figure Description

[0036] Figure 1 This is a block diagram of a wireless communication system applicable to embodiments of this application;

[0037] Figure 2a This is a flowchart of an updated system information transmission process in related technologies;

[0038] Figure 2b This is a schematic diagram of a multi-downlink carrier heterogeneous cell model in related technologies;

[0039] Figure 2c This is a schematic diagram of a multi-downlink carrier homogeneous cell model in related technologies;

[0040] Figure 3 This is one of the flowcharts of an information receiving method provided in the embodiments of this application;

[0041] Figure 4 This is a second flowchart of an information sending method provided in an embodiment of this application;

[0042] Figure 5 This is one of the structural schematic diagrams of an information receiving device provided in the embodiments of this application;

[0043] Figure 6This is a second schematic diagram of the structure of an information transmission device provided in an embodiment of this application;

[0044] Figure 7 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0045] Figure 8 This is a schematic diagram of the structure of a terminal provided in an embodiment of this application;

[0046] Figure 9 This is one of the structural schematic diagrams of a network-side device provided in the embodiments of this application;

[0047] Figure 10 This is a second schematic diagram of the structure of a network-side device provided in an embodiment of this application. Detailed Implementation

[0048] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0049] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, the first object can be one or more. Furthermore, "or" in this application indicates at least one of the connected objects. For example, the scope of protection for "A or B" covers at least three scenarios: Scenario 1: including A but not B; Scenario 2: including B but not A; Scenario 3: including both A and B. In addition, the terms "A and / or B," "at least one of A and B," and "at least one of A or B" also cover at least the above three scenarios. The character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0050] The term "instruction" in this application can be either a direct instruction (or explicit instruction) or an indirect instruction (or implicit instruction). A direct instruction can be understood as the sender explicitly informing the receiver of specific information, the required operation, or the requested result in the instruction sent. An indirect instruction can be understood as the receiver determining the corresponding information based on the instruction sent by the sender, or making a judgment and determining the required operation or requested result based on the judgment result.

[0051] It is worth noting that the technologies described in this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), or other systems. The terms "system" and "network" in this application are often used interchangeably, and the described technologies can be used in the systems and radio technologies mentioned above, as well as in other systems and radio technologies. The following description describes New Radio (NR) systems for illustrative purposes, and the term NR is used in most of the following description; however, these technologies can also be applied to systems other than NR systems, such as 6th Generation (6G) communication systems.

[0052] Figure 1This diagram illustrates a block diagram of a wireless communication system applicable to embodiments of this application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 can also be referred to as User Equipment (UE), and can be a mobile phone, tablet computer, laptop computer, notebook computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), augmented reality (AR), virtual reality (VR) device, robot, wearable device, flight vehicle, vehicle user equipment (VUE), shipboard equipment, pedestrian user equipment (PUE), smart home devices (home appliances with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), game consoles, personal computers (PCs), ATMs, or self-service machines, etc. Wearable devices include: smartwatches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart chains, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among these, in-vehicle devices can also be referred to as in-vehicle terminals, in-vehicle controllers, in-vehicle modules, in-vehicle components, in-vehicle chips, or in-vehicle units, etc. It should be noted that the specific type of terminal 11 is not limited in this application embodiment. Network-side equipment 12 may include access network equipment or core network equipment, wherein access network equipment may also be referred to as Radio Access Network (RAN) equipment, radio access network function, or radio access network unit. Access network equipment may include base stations, Wireless Local Area Network (WLAN) access points (APs), or Wireless Fidelity (WiFi) nodes, etc.Among them, base stations can be referred to as Node B (NB), Evolved Node B (eNB), Next Generation Node B (gNB), New Radio Node B (NR Node B), Access Point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), Radio Base Station, Radio Transceiver, Basic Service Set (BSS), Extended Service Set (ESS), Home Node B (HNB), Home Evolved Node B, Transmission and Reception Point (TRP), Non-Terrestrial Network (NTN) equipment (such as satellite or high altitude platform stations). The term "base station" can be any suitable term in the field, such as "station" or any other appropriate term in the relevant field, as long as the same technical effect is achieved. The term "base station" is not limited to specific technical terms. It should be noted that the embodiments of this application only use the base station in the NR system as an example for introduction, and do not limit the specific type of base station.

[0053] Core network equipment, also known as core network nodes, core network functions, or core network elements, includes, but is not limited to, at least one of the following: Mobility Management Entity (MME), Access and Mobility Management Function (AMF), Session Management Function (SMF), User Plane Function (UPF), Policy Control Function (PCF), Policy and Charging Rules Function (PCRF), Edge Application Server Discovery Function (EASDF), Unified Data Management (UDM), Unified Data Repository (UDR), Home Subscriber Server (HSS), Centralized network configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (L-NEF), and Binding Support. Functions include BSF, Application Function (AF), Location Management Function (LMF), Gateway Mobile Location Centre (GMLC), Network Data Analytics Function (NWDAF), and Non-Terrestrial Network (NTN) equipment (such as satellite or high altitude platform station).It should be noted that the embodiments of this application only use the core network equipment in the NR system as an example for introduction, and do not limit the specific type of core network equipment. If the name of the core network equipment mentioned in the embodiments of this application changes in subsequent protocol versions (e.g., 6G), it is also within the scope of protection of this application.

[0054] Optionally, the core network equipment can be implemented by one or more functional modules in a single device, or by multiple devices working together; this application does not specifically limit this. It is understood that the aforementioned functional modules can be network elements in hardware devices, software functional modules running on dedicated hardware, or virtualized functional modules instantiated on a platform (e.g., a cloud platform).

[0055] For ease of understanding, the following explains some aspects of the embodiments of this application:

[0056] 1. 5G NR System Information

[0057] The system information of NR includes Minimum System Information (MSI) and Other System Information (OSI). MSI includes Master Information Block (MIB) and Remaining Minimum System Information (RMSI), and RMSI includes System Information Block (SIB)1.

[0058] Other system information includes system information other than MSI.

[0059] A brief introduction to the above system information is as follows:

[0060] MIB: Includes System Frame Number (SFN), SIB1 scheduling configuration, cell permission information (bar), and intra-frequency cell reselection permission indication;

[0061] SIB1 includes cell selection information, Public Land Mobile Network (PLMN) list, cell identifier, tracking area code, RAN area code, cell reservation indication, system information scheduling information, on-demand access related configuration, SSB transmission configuration, TDD uplink and downlink configuration, etc.

[0062] SIB2: Includes cell reselection configuration;

[0063] SIB3: Includes information on neighboring cells on the same frequency, including cell reselection parameters;

[0064] SIB4: Includes neighbor cell information on frequencies other than the serving cell frequency and cell information for other radio access technologies, as well as related cell reselection parameters;

[0065] SIB5: Includes LTE carrier frequency and cell information, as well as related cell reselection parameters;

[0066] SIB6 and SIB7: Earthquake-related notification information;

[0067] SIB8: Business Mobility Warning Message;

[0068] SIB9: Wireless system clock information, based on UTC time indication.

[0069] In addition, there are other system information introduced for different purposes, including SIB10 to SIB25, which will not be described in detail here.

[0070] 2. Sending system information

[0071] System information is sent by the cell via broadcast. Before a UE can access a cell and obtain services, it needs to receive at least some of the system information broadcast by the cell, including MIB, SIB1 and other SIBs.

[0072] In order to receive SIBs (including SIB1 and other SIBs), the UE needs to obtain the required configuration parameters from the network, such as the SIB-related Control Resource Set (CORESET) and search space.

[0073] For SIB reception, the CORESET and Search Space parameters indicate on which time-frequency resources the UE listens for in order to receive downlink scheduling signaling used to schedule SIB transmissions. Specifically:

[0074] CORESET: Used to indicate the frequency range and duration that downlink scheduling signaling sent by the scheduling system may occupy;

[0075] Search Space: Used to indicate the time domain period and offset that downlink scheduling signaling may occupy when the scheduling system sends information.

[0076] 3. System information updates:

[0077] When a cell in an NR system needs to update its system information, this must be done according to the system information update cycle. When a cell needs to update its system information, the base station can send a system information update notification to the UE in the Nth system information update cycle and broadcast the new system information in the (N+1)th system information update cycle. The terminal obtains the system information update notification (SI change notification) by listening to paging. The base station can send the system information update notification multiple times to ensure that as many UEs camped in the cell as possible receive the notification. Figure 2a As shown, when the UE receives a system information update notification in the Nth system information update cycle (in the Nth system information update cycle, the network broadcasts the system information before the update), it will receive the new system information in the next system information update cycle. N is an integer greater than or equal to 0.

[0078] 4. Multi-downlink carrier cell model

[0079] A multi-downlink carrier cell refers to a cell that includes multiple downlink carriers and one or more uplink carriers, with different downlink carriers having different frequency bands (i.e., the frequency range of radio resources they contain). Figure 2b and Figure 2c Two multi-downlink carrier cells are displayed.

[0080] in Figure 2b This paper presents a heterogeneous cell model consisting of a low-frequency downlink carrier and a high-frequency downlink carrier. The low-frequency downlink carrier provides macro coverage, while the high-frequency downlink carrier provides multi-point, small-area coverage.

[0081] Figure 2c This shows a homogeneous cell consisting of multiple downlink carriers, meaning that multiple downlink carriers have approximately the same coverage area.

[0082] The following description, in conjunction with the accompanying drawings, details the information receiving method, information sending method, apparatus, and related equipment provided in this application through some embodiments and application scenarios.

[0083] See Figure 3 , Figure 3 This is a flowchart of an information receiving method provided in an embodiment of this application, such as... Figure 3 As shown, the information receiving method includes the following steps:

[0084] Step 101: The first terminal listens for paging messages on the first carrier, and the first carrier is determined based on the first system information received by the first terminal on the second carrier;

[0085] Step 102: In the event of a change in system information, the first terminal listens for the paging message and the changed system information on the first carrier; or, in the event of a change in system information, the first terminal listens for the paging message and the changed system information on the second carrier.

[0086] Wherein, both the first carrier and the second carrier are downlink carriers of the first cell.

[0087] The system information includes system information such as MIB and SIB. A system information change refers to a change in the content of the system information, such as a change in the content of the MIB or SIB. A change in the content of the SIB refers to a change in the content of one or more SIBs.

[0088] In one implementation, the first terminal listens for paging messages on the first carrier. This can be understood or replaced as the first terminal listening to the first carrier to receive paging messages.

[0089] In one implementation, the first terminal listens to the paging message and the changed system information on the first carrier. This can be understood or replaced as the first terminal listening to the first carrier to receive the paging message and the changed system information.

[0090] For example, the network-side equipment corresponding to the first cell transmits system information on the second carrier and a paging message to the first terminal on the first carrier. If the system information changes, the network-side equipment corresponding to the first cell transmits the changed system information and the paging message to the first terminal on the first carrier. If the system information changes, the first terminal listens for the paging message and the changed system information on the first carrier. This avoids the first terminal needing to listen for system information on the second carrier and thus missing the paging message when the system information changes.

[0091] It should be noted that the network-side equipment corresponding to the first cell can periodically transmit system information on the second carrier. It can send paging messages to the first terminal on the first carrier and paging messages to the second terminal on the second carrier. This enables paging load sharing, preventing all terminals from listening for paging on the second carrier (i.e., the network-side equipment corresponding to the first cell sending paging messages for all terminals on the second carrier), thus avoiding excessive paging load on the second carrier. For example, the network-side equipment corresponding to the first cell sends paging messages to terminals with odd-numbered terminal identifiers on the first carrier and to terminals with even-numbered terminal identifiers on the second carrier, achieving paging load balancing.

[0092] In one implementation, when system information changes, the network-side device corresponding to the first cell can periodically send the changed system information on the second carrier. Sending the changed system information on the first carrier for a short time enables the first terminal to listen to the changed system information while listening to the paging message on the first carrier.

[0093] In addition, in this embodiment of the application, the transmission by the network-side device corresponding to the first cell can also be described as "transmission by the first cell"; it can be understood that "transmission by the first cell" refers to the transmission by the network-side device corresponding to the first cell. The network-side device corresponding to the first cell can refer to the network-side device that transmits wireless signals to generate the first cell.

[0094] In one embodiment, the first terminal listens to the paging message and the changed system information on the second carrier. This can be understood or replaced as the first terminal listening to the second carrier to receive the paging message and the changed system information.

[0095] For example, the network-side equipment corresponding to the first cell transmits system information on the second carrier and a paging message to the first terminal on the first carrier. If the system information changes, the network-side equipment transmits the changed system information and the paging message to the first terminal on the second carrier. If the system information changes, the first terminal listens for the paging message and the changed system information on the second carrier. This avoids the first terminal needing to listen for system information on the second carrier and thus missing the paging message when the system information changes.

[0096] In one implementation, when system information changes, the network-side device corresponding to the first cell can periodically send the changed system information on the second carrier and send a paging message to the first terminal on the second carrier for a short time, so that the first terminal can listen to the paging message while listening to the changed system information on the second carrier.

[0097] In one embodiment, a first terminal listens to a second carrier to receive system information; the first terminal determines a first carrier for listening to paging messages based on the system information received on the second carrier; the first terminal listens to paging messages on the first carrier; if the system information changes, the first terminal listens to the paging messages and the changed system information on the first carrier; or, if the system information changes, the first terminal listens to the paging messages and the changed system information on the second carrier.

[0098] It is understandable that the first cell is a multi-downlink carrier cell, which includes a first carrier and a second carrier, and the first carrier and the second carrier have different frequency bands.

[0099] It is understood that the system information (such as the first system information) received via the first carrier and / or the second carrier is the system information of the first cell.

[0100] In one embodiment, the first terminal may be a terminal that supports listening to information on only one carrier at a time. It is understood that the first terminal is a terminal that does not support listening to information on both the first and second carriers simultaneously.

[0101] In one implementation, when system information changes, it can be understood or replaced as follows: when the first terminal receives a system information change notification, for example, the first terminal receives a first indication message, which is used to indicate a system information change.

[0102] In one implementation, the step of the first terminal listening to the paging message and the changed system information on the first carrier when system information changes includes: the first terminal receiving a system information change notification at a first moment, and the first terminal listening to the paging message and the changed system information on the first carrier starting from a second moment, where the second moment is the start time of the next system information update cycle after the first moment. It can be understood that the second moment is the end time of the system information update cycle in which the first moment occurred or belongs.

[0103] In one embodiment, the first terminal listens to the paging message and the changed system information on the first carrier, including:

[0104] The first terminal receives a system information change notification at a first moment. Starting from a second moment, the first terminal listens to the first carrier to receive the paging message and the changed system information. The second moment is the start time of the next system information update cycle after the first moment. If the first terminal obtains the changed system information on the first carrier within a first listening time starting from the second moment, the first terminal stops listening to the system information on the first carrier. If the first terminal does not obtain the changed system information on the first carrier within the first listening time starting from the second moment, the first terminal switches to listening to the second carrier to receive the system information.

[0105] The first listening duration is indicated by the network-side device, agreed upon by the protocol, or pre-configured.

[0106] Taking a change in an SIB as an example, the first terminal can determine the SIB whose content has been changed based on the indication of SIB1. For example, the first terminal learns that SIB5 has been changed through SIB1; the first terminal then listens to the transmission time and frequency position of SIB5, and after receiving SIB5, the first terminal determines that SIB5 has been successfully received, thus obtaining the changed SIB5.

[0107] In one embodiment, the step of the first terminal listening to the paging message and the changed system information on the second carrier when the system information changes includes: the first terminal receiving a system information change notification at a first moment, and the first terminal listening to the paging message and the changed system information on the second carrier starting from a second moment, wherein the second moment is the start time of the next system information update cycle after the first moment.

[0108] In one embodiment, the first terminal listens to the paging message and the changed system information on the second carrier, including:

[0109] The first terminal receives a system information change notification at a first moment. During a second listening period starting from a second moment, the first terminal listens to the second carrier to receive the paging message and the changed system information. The second moment is the start time of the next system information update cycle after the first moment. After the second listening period, the first terminal switches to listening to the first carrier to receive the paging message.

[0110] The second listening duration is indicated by the network-side device, agreed upon by the protocol, or pre-configured.

[0111] Optionally, the first terminal does not listen to the paging message and the changed system information on the second carrier while listening to the paging message and the changed system information on the first carrier.

[0112] or,

[0113] The first terminal listens to the paging message and the changed system information on the second carrier while not listening to the paging message and the changed system information on the first carrier.

[0114] In one embodiment, the first terminal listens to the paging message and the modified system information on the first carrier but not on the second carrier. This can be understood as the first terminal only listening to the paging message and the modified system information on the first carrier in the first carrier and the second carrier.

[0115] In one embodiment, the first terminal listens to the paging message and the changed system information on the second carrier while not listening to the paging message and the changed system information on the first carrier. This can be understood as the first terminal only listening to the paging message and the changed system information on the second carrier in the first and second carriers.

[0116] In this embodiment, the first terminal listens for paging messages on the first carrier. When system information changes, the first terminal listens for both the paging message and the changed system information on the first carrier. This allows the network-side device corresponding to the first cell to send paging messages to the first terminal only on the first carrier in both the first and second carriers, reducing the radio resource overhead of paging message transmission. Furthermore, the first terminal can continue listening for paging messages on the first carrier, reducing the probability of the first terminal missing a paging call. Alternatively, the first terminal listens for paging messages on the first carrier. When system information changes, the first terminal listens for both the paging message and the changed system information on the second carrier. This allows the network-side device corresponding to the first cell to send the changed system information and paging messages to the first terminal only on the second carrier in both the first and second carriers, reducing the radio resource overhead of system information and paging message transmission. Moreover, by listening for paging messages on the second carrier, the probability of the first terminal missing a paging call is reduced.

[0117] Optionally, in the event of a change in system information, the first terminal listens for the paging message and the changed system information on the first carrier wave, including:

[0118] If the first condition is met, the first terminal listens for the paging message and the changed system information on the first carrier.

[0119] The first condition includes:

[0120] The first terminal receives a first indication message, which is used to indicate a change in system information;

[0121] The first terminal is configured to receive system information on the first carrier.

[0122] The first indication information can be: system information change notification.

[0123] In one embodiment, the step of the first terminal listening to the paging message and the changed system information on the first carrier when the first condition is met includes: the first terminal receiving a system information change notification at a first moment, the first terminal determining that the first condition is met, and starting from a second moment, the first terminal listening to the paging message and the changed system information on the first carrier, where the second moment is the start time of the next system information update cycle after the first moment.

[0124] In this embodiment, when the first condition is met, the first terminal listens to the paging message and the changed system information on the first carrier, thereby enabling the network-side device corresponding to the first cell to send the changed system information on the carrier on which the first terminal listens to the paging when the system information changes, so that the first terminal listening to the paging on the first carrier can simultaneously obtain system information and listen to the paging.

[0125] Optionally, the method further includes:

[0126] If the first condition is not met, the first terminal listens to the first carrier to receive the paging message, and if the first terminal needs to listen to system information, the first terminal changes to listening to the second carrier to receive system information.

[0127] The first condition includes:

[0128] The first terminal receives a first indication message, which is used to indicate a change in system information;

[0129] The first terminal is configured to receive system information on the first carrier.

[0130] It should be noted that the embodiments of this application do not limit the situation in which the first terminal needs to monitor system information. For example, when the first terminal needs to perform a certain service, it needs to obtain system information related to that service.

[0131] In this embodiment, if the first condition is not met, the first terminal listens to the first carrier to receive the paging message. If the first terminal needs to listen to system information, the first terminal changes to listening to the second carrier to receive system information. This enables the network-side device corresponding to the first cell to send system information only on the second carrier and send paging messages to the first terminal only on the first carrier when no system information change occurs. This reduces the wireless resource overhead of sending system information and paging messages.

[0132] Optionally, in the event of a change in system information, the first terminal listens to the paging message and the changed system information on the second carrier, including:

[0133] If the second condition is met, the first terminal listens for the paging message and the changed system information on the second carrier.

[0134] The second condition includes:

[0135] The first terminal receives a first indication message, which is used to indicate a change in system information.

[0136] In one embodiment, the step of the first terminal listening to the paging message and the changed system information on the second carrier when the second condition is met includes: the first terminal receiving a system information change notification at a first moment, the first terminal determining that the second condition is met, and starting from a second moment, the first terminal listening to the paging message and the changed system information on the second carrier, where the second moment is the start time of the next system information update cycle after the first moment.

[0137] In this embodiment, when the second condition is met, the first terminal listens to the paging message and the changed system information on the second carrier, thereby enabling the network-side device corresponding to the first cell to migrate the paging of the first terminal to the carrier that sends the system information when the system information changes, so that the first terminal can simultaneously obtain system information and listen to the paging.

[0138] Optionally, the method further includes:

[0139] If the second condition is not met, the first terminal listens to the first carrier to receive the paging message, and if the first terminal needs to listen to system information, the first terminal changes to listening to the second carrier to receive system information.

[0140] The second condition includes:

[0141] The first terminal receives a first indication message, which is used to indicate a change in system information.

[0142] It should be noted that the embodiments of this application do not limit the situation in which the first terminal needs to monitor system information. For example, when the first terminal needs to perform a certain service, it needs to obtain system information related to that service.

[0143] In this embodiment, if the second condition is not met, the first terminal listens to the first carrier to receive the paging message. If the first terminal needs to listen to system information, the first terminal changes to listening to the second carrier to receive system information. This enables the network-side device corresponding to the first cell to send system information only on the second carrier and send paging messages to the first terminal only on the first carrier when no system information change occurs. This reduces the wireless resource overhead of message transmission.

[0144] Optionally, the first condition further includes: the first terminal receiving second indication information, the second indication information being used to instruct the first terminal to receive carrier information for system information reception;

[0145] And / or,

[0146] The first indication information and / or the second indication information are received by the first terminal on the first carrier.

[0147] It should be noted that the first indication information and the second indication information can be sent through the same signaling or through different signaling.

[0148] In one implementation, the first indication information and the second indication information in the first condition are sent via the same signaling.

[0149] Optionally, the second condition further includes: the first terminal receives second indication information, the second indication information being used to instruct the first terminal to receive carrier information for system information reception;

[0150] And / or,

[0151] The first indication information and / or the second indication information are received by the first terminal on the first carrier.

[0152] It should be noted that the first indication information and the second indication information can be sent through the same signaling or through different signaling.

[0153] In one implementation, the first indication information and the second indication information in the second condition are sent via the same signaling.

[0154] In this embodiment, the first indication information is also used to indicate the downlink carrier information for the first terminal to receive system information, so that while the first terminal learns of the system information change based on the first indication information, it can also learn the downlink carrier for receiving system information indicated by the network side device.

[0155] In this embodiment, the first indication information is received by the first terminal on the first carrier, so that the first terminal can obtain the indication of system information change notification by listening to the paging carrier.

[0156] Optionally, the method includes:

[0157] The first terminal receives the first system information on the second carrier.

[0158] The first system information is used to instruct the first terminal to perform paging listening on the first carrier, and the first system information is also used to instruct the first terminal to perform system information listening configuration information on the first carrier.

[0159] In one implementation, the configuration information indicated by the first system information may include at least one of the following: CORESET, search space.

[0160] In one embodiment, the first terminal receives first system information on the second carrier; wherein the first system information is used to instruct the first terminal to perform paging monitoring on the first carrier, and the first system information is also used to instruct the first terminal to perform system information monitoring on the first carrier; the first terminal monitors paging messages on the first carrier; in the event of a change in system information, the first terminal monitors the paging messages and the changed system information on the first carrier.

[0161] In this embodiment, the first terminal receives the first system information on the second carrier, thereby being able to determine the carrier for paging monitoring through the first system information, and also being able to learn the configuration for system information monitoring on the carrier for paging monitoring by the first terminal through the first system information.

[0162] Optionally, the configuration information indicated by the first system information includes: a first listening duration;

[0163] The first terminal listens to the paging message and the changed system information on the first carrier, including:

[0164] The first terminal listens to the first carrier to receive the paging message and the changed system information;

[0165] If the first terminal acquires the modified system information on the first carrier within the first listening time, then the first terminal stops listening for system information on the first carrier; or,

[0166] If the first terminal fails to acquire the modified system information on the first carrier within the first listening time, the first terminal will switch to listening to the second carrier to receive the system information.

[0167] In one implementation, the configuration information indicated by the first system information may include: CORESET, searchspace, and first listening duration.

[0168] In one implementation, the start time of the first listening duration can be the start time of the next system information change cycle after the first terminal receives the system information change notification.

[0169] In one implementation, the first terminal stops listening to the system information on the first carrier when it receives the changed system information; thus, it does not have to wait until the end of the first listening time to stop listening to the system information on the first carrier.

[0170] In one implementation, when system information changes, the first terminal listens to the paging message and the changed system information on the first carrier. This can include: the first terminal receiving a system information change notification at a first moment, and starting from a second moment, the first terminal listening to the first carrier to receive the paging message and the changed system information, where the second moment is the start time of the next system information update cycle after the first moment; if the first terminal obtains the changed system information on the first carrier within the first listening duration starting from the second moment, then the first terminal stops listening to the system information on the first carrier; if the first terminal does not obtain the changed system information on the first carrier within the first listening duration starting from the second moment, then the first terminal switches to listening to the second carrier to receive the system information.

[0171] In one embodiment, if the first terminal obtains the changed system information on the first carrier within the first listening time, the first terminal stops listening to the system information on the first carrier, and the first terminal continues to listen to paging messages on the first carrier.

[0172] It should be noted that, in the event of a change in system information, the first cell sends a paging message to the first terminal on the first carrier, and the first cell sends the changed system information on the first carrier within the first listening duration.

[0173] In this embodiment, by configuring a first listening duration, the network-side device corresponding to the first cell notifies the first terminal listening to paging on the first carrier of the maximum duration for which it can receive system information on the first carrier. This ensures consistency between the network-side device broadcasting system information on the first carrier and the first terminal listening to system information on the first carrier, thus avoiding the problem that the first terminal is still listening to system information on the first carrier even after the network-side device has stopped broadcasting system information on the first carrier.

[0174] Optionally, the method includes:

[0175] The first terminal receives the first system information on the second carrier.

[0176] The first system information is used to instruct the first terminal to perform paging listening on the first carrier, and the first system information is also used to instruct the first terminal to perform paging message listening on the second carrier.

[0177] In one embodiment, the first terminal receives first system information on the second carrier; wherein the first system information is used to instruct the first terminal to perform paging monitoring on the first carrier, and the first system information is also used to instruct the first terminal to perform paging message monitoring on the second carrier; the first terminal monitors paging messages on the first carrier; if the system information changes, the first terminal monitors the paging messages and the changed system information on the second carrier.

[0178] In this embodiment, the first terminal receives the first system information on the second carrier, thereby being able to determine the carrier for paging monitoring through the first system information, and also being able to learn the configuration for paging monitoring on the carrier for the first terminal to monitor system information through the first system information.

[0179] Optionally, the configuration information indicated by the first system information includes: a second listening duration;

[0180] The first terminal listens to the paging message and the changed system information on the second carrier, including:

[0181] During the second monitoring period, the first terminal monitors the second carrier to receive the paging message and the changed system information; and / or,

[0182] After the second listening duration, the first terminal switches to listening to the first carrier to receive the paging message.

[0183] In one implementation, the start time of the second listening duration can be the start time of the next system information change cycle after the first terminal receives the system information change notification.

[0184] In one implementation, when system information changes, the first terminal listens to the paging message and the changed system information on the second carrier. This can include: the first terminal receiving a system information change notification at a first moment; and during a second listening period starting from a second moment, the first terminal listens to the second carrier to receive the paging message and the changed system information, where the second moment is the start time of the next system information update cycle after the first moment; after the second listening period, the first terminal switches to listening to the first carrier to receive the paging message.

[0185] It should be noted that, in the event of a change in system information, the first cell transmits the changed system information on the second carrier, and the first cell transmits a paging message to the first terminal on the second carrier within the second listening duration.

[0186] In this implementation, by configuring a second listening duration, the network-side device corresponding to the first cell notifies the first terminal listening on the first carrier of the maximum duration for listening to paging on the second carrier. This ensures that the duration for which the network-side device sends paging messages on the second carrier and the duration for which the first terminal listens for paging messages on the second carrier are consistent. This avoids the problem that the first terminal is still listening for paging on the second carrier even though the network-side device has already stopped sending paging messages for the first terminal listening for paging on the second carrier.

[0187] According to NR's cell model, a cell contains only one downlink carrier. The UE receives all system information on this downlink carrier, including system information being broadcast by the base station and cell system information transmitted based on the UE's request. Since there is only one downlink carrier in a cell, the UE receives system information on only one downlink carrier, eliminating the problem of determining which downlink carrier to receive system information on from multiple downlink carriers.

[0188] In subsequent mobile communication systems, multi-downlink carrier cells will be introduced. When a cell has multiple downlink carriers, if the cell's system information is transmitted on multiple downlink carriers, it will result in duplicate transmission of the system information. This will not only increase the radio resource overhead of system information transmission, but also increase the energy consumption of the base station.

[0189] If system information is transmitted on only one downlink carrier (such as carrier A1), terminals that need to obtain system information can only receive it on carrier A1. Thus, during the reception of system information, terminals that need to listen for paging messages on carrier A2 (assuming they are not simultaneously listening for system information on carrier A1 and paging messages on carrier A2) risk missing the paging message reception.

[0190] This application provides a system information transmission / reception method for multi-downlink carrier cells, which reduces the retransmission of system information on different carriers while also reducing the occurrence of missed paging calls at the terminal.

[0191] In this embodiment, multiple disconnected terminals (such as idle terminals) camped in the same cell can receive paging messages by listening to different downlink carriers. For example, UE1 and UE2 are both camped in cell A; cell A has two carriers (such as carrierA1 and carrierA2); UE1 listens to paging messages sent by carrierA1; UE2 listens to paging messages sent by carrierA2. This achieves the effect of paging load sharing, that is, avoiding excessive paging load on carrierA1 caused by all UEs listening for paging on carrierA1.

[0192] In a Single Cell Multiple Carrier (SCMC) model, a cell may have multiple carriers, such as carrier A1 and carrier A2, both sending paging messages to different UEs (i.e., different UEs camped on different downlink (DL) carriers) to share paging overhead. However, it's desirable for only one DL carrier (e.g., carrier A1) to send broadcast messages to reduce broadcast overhead. In this scenario, the following problem exists: if system information changes, all UEs will be listening for broadcast messages on carrier A1, causing UEs that were originally listening for paging messages on carrier A2 to be unable to receive paging messages. In this embodiment, during a period when system information changes, paging messages from carrier A2 are moved to carrier A1; or, broadcast messages are sent on both carrier A1 and carrier A2. This allows UEs to receive both system information and paging messages simultaneously on a single carrier.

[0193] In this embodiment of the application, the first cell (e.g., Cell A) includes multiple downlink carriers, including a second carrier (e.g., carrier A1) and a first carrier (e.g., carrier A2); Cell A periodically broadcasts system information on carrier A1; under certain circumstances, it also broadcasts system information on carrier A2.

[0194] Terminals listening for paging on carrierA2 (such as the first terminal) obtain system information of the serving cell through the following two methods:

[0195] Method 1: If the preset conditions are not met, switch to monitoring carrierA1 for a short period of time and receive cell system information through carrierA1;

[0196] Method 2a: Under the condition that the preset conditions are met, receive cell system information through carrier A2;

[0197] Method 2b: Under the condition that the preset conditions are met, the terminal switches to listening to system information and paging messages on carrierA1 within a preset time period T.

[0198] When Method 1 and Method 2a are used together (in this case, the default condition is the first condition):

[0199] The preset conditions include:

[0200] The terminal receives the first instruction information, which may be a system information change instruction.

[0201] The terminal is configured to receive system information on the current carrier.

[0202] Optionally, the preset conditions also include: the first indication information indicates that the terminal receives system information on the resident carrier.

[0203] If all items / conditions included in the preset conditions are met, the preset conditions are deemed to be met; otherwise, the preset conditions are deemed not met.

[0204] In addition, before the terminal receives cell system information through carrier A2, the terminal receives cell system information through carrier A1. The system information includes reception configuration information associated with carrier A2. The configuration information is used for receiving system information, for example, instructing the terminal to listen to the time-frequency location information of the resources sent by the scheduling SIB on carrier A2.

[0205] When Method 1 and Method 2b are used together (in this case, the default condition is the second condition):

[0206] The preset conditions include:

[0207] The terminal receives the first instruction information, which may be a system information change instruction.

[0208] Optionally, the preset conditions also include: the first indication information indicates that the terminal receives system information on the resident carrier.

[0209] If all items / conditions included in the preset conditions are met, the preset conditions are deemed to be met; otherwise, the preset conditions are deemed not met.

[0210] The following examples will provide further explanation:

[0211] The following examples can be used in the following scenarios: CellA contains multiple downlink carriers, including carrierA1 and carrierA2; CellA periodically broadcasts system information on carrierA1; and under certain circumstances, broadcasts system information on carrierA2.

[0212] Example 1:

[0213] This example describes how to enable a terminal to obtain system information triggered by non-system information change notifications.

[0214] Step (1): The terminal (e.g., UE) obtains some system information (e.g., SIB1) on carrier A1, and performs paging listening on carrier A2 according to the instructions of the partial system information.

[0215] Step (2): When the terminal needs to obtain system information (e.g., when the terminal needs to perform a certain service (assuming it is MBMS), the terminal needs to obtain the system information related to that service (assuming it is SIB30); in step (1), the terminal did not obtain SIB30. Because the preset conditions are not met, the terminal starts listening to carrierA1; optionally, the terminal stops listening to paging on carrierA2; for example, based on whether the terminal is capable of listening to both carrierA1 and carrierA2 at the same time, it is determined whether the terminal stops listening to paging on carrierA2.

[0216] Step (3): After the terminal obtains SIB30 from carrierA1, the terminal starts listening to carrierA2 and stops listening to carrierA1.

[0217] The preset conditions include:

[0218] The terminal receives the first instruction information, which may be a system information change instruction.

[0219] Example 2:

[0220] This example describes how to implement system information retrieval triggered by a terminal system information change notification.

[0221] Step (1): The terminal obtains partial system information (such as SIB1) on carrierA1, and performs paging listening on carrierA2 according to the partial system information indication; the partial system information indication also includes configuration parameters for the terminal to perform system information listening on carrierA2; the configuration parameters include CORESET, search space.

[0222] Step (2): At time T1, the terminal receives a system information change notification. The terminal determines that the preset conditions are met, and starting from time T2, the terminal listens for system information on carrier A2. Time T2 is the start time of the next system information update cycle after time T1.

[0223] Step (3): The terminal obtains the changed system information from carrierA2.

[0224] While the terminal acquires system information, it also listens for paging messages on carrierA2.

[0225] The preset conditions include:

[0226] The terminal receives the first instruction information, which may be a system information change instruction.

[0227] The terminal is configured to receive system information on the current carrier.

[0228] Optionally, the preset conditions also include: the first indication information indicates that the terminal receives system information on the resident carrier.

[0229] In this example, when system information changes, the first cell sends the updated system information on the carrier on which the terminal listens for paging messages. This allows the terminal to simultaneously obtain system information and listen for paging messages. Because system information changes infrequently, this short-term transmission of system information across multiple carriers triggered by system information changes does not result in significant waste of air interface resources.

[0230] Example 3:

[0231] This example describes how to enable a terminal to obtain system information triggered by a system information change notification.

[0232] Step (1): The terminal obtains partial system information (such as SIB1) on carrierA1 and performs paging listening on carrierA2 according to the partial system information indication; the partial system information indication also includes configuration parameters for the terminal to perform system information listening on carrierA2; the configuration parameters include CORESET, search space and listening duration T (such as the first listening duration).

[0233] Step (2): At time T1, the terminal receives a system information change notification. The terminal determines that the preset conditions are met, and starting from time T2, the terminal listens for system information on carrier A2. Time T2 is the start time of the next system information update cycle after time T1.

[0234] Step (3): If the terminal obtains the changed target system information from carrierA2 within the listening time T, the terminal stops listening to the system information.

[0235] While the terminal obtains system information from carrierA2, the terminal also listens for paging messages on carrierA2.

[0236] If the terminal fails to obtain the changed target system information from carrier A2 within the listening duration T, the terminal will switch to obtaining the updated system information from carrier A1.

[0237] While the terminal obtains system information from carrierA1, the terminal stops listening for paging messages on carrierA2.

[0238] The preset conditions include:

[0239] The terminal receives the first instruction information, which may be a system information change instruction.

[0240] The terminal is configured to receive system information on the current carrier.

[0241] Optionally, the preset conditions also include: the first indication information indicates that the terminal receives system information on the resident carrier.

[0242] In this example, the first cell's broadcasting of system information on carrier A2 is a short-term action; otherwise, the broadcast overhead would be significant. If the terminal fails to obtain system information within the broadcast period, it needs to obtain it from carrier A1. By notifying the terminal of the listening time T for receiving system information on carrier A2, the inconsistency of the terminal still listening for broadcasts on carrier A2 even though the first cell has stopped broadcasting on carrier A2 is avoided.

[0243] Example 4:

[0244] This example describes how to enable a terminal to obtain system information triggered by a system information change notification.

[0245] Step (1): The terminal obtains some system information (such as SIB1) on carrierA1, and performs paging listening on carrierA2 according to the instructions of the partial system information;

[0246] The system information indication also includes configuration parameters for the terminal to monitor system information on carrierA1, including the monitoring duration T (such as the second monitoring duration).

[0247] Step (2): At time T1, the terminal receives a system information change notification. The terminal determines that the preset conditions are met, and starting from time T2, the terminal listens for system information on carrier A1. Time T2 is the start time of the next system information update cycle after time T1.

[0248] Step (3): The terminal obtains the changed system information from carrierA1.

[0249] While the terminal acquires system information, it also listens for paging messages on carrierA1.

[0250] Step (4): Starting from T2, after listening for a duration T, the terminal returns to carrierA2 to listen for paging messages.

[0251] The preset conditions include:

[0252] The terminal receives the first instruction information, which may be a system information change instruction.

[0253] Optionally, the preset conditions also include: the first indication information indicates that the terminal receives system information on the resident carrier.

[0254] In this example, during a system information change, the first cell anticipates that all terminals (including those listening for paging on carrier A2) will access system information on carrier A1. Therefore, paging messages sent on carrier A2 are temporarily moved to carrier A1. This allows terminals to simultaneously receive system information and listen for paging on carrier A1. Furthermore, defining a listening duration T allows terminals listening on carrier A2 to know the maximum duration they can listen for paging on carrier A1, preventing situations where the first cell has stopped sending paging messages for terminals listening for paging on carrier A2, but the terminal is still listening for paging on carrier A1.

[0255] Example 5:

[0256] This example describes how to assist a terminal in obtaining system information triggered by a system information change notification through the behavior of network-side devices.

[0257] Step (1): The first cell sends system information on carrier A1, and the system information indicates the configuration parameters for the terminal to listen to system information on carrier A2;

[0258] This configuration parameter includes one or more of the following: CORESET, search space, and listening duration T (e.g., first listening duration).

[0259] Step (2): In the first system information change cycle, the first cell sends a system information change notification; at the beginning of the next system information change cycle of the first system information change cycle, the first cell sends the changed system information on carrier A2.

[0260] During the first system information change cycle, the first cell only sends system information to carrier A1 and not to carrier A2.

[0261] The first cell can send the changed system information on carrier A2 using the configuration parameters broadcast in step (1), for example:

[0262] System information scheduling is based on CORESET and search space;

[0263] The next system information change cycle begins after the first system information change cycle. The duration for the first cell to send the changed system information on carrier A2 is related to the listening duration T, such as: not less than T.

[0264] Example 6:

[0265] This example describes how to assist a terminal in obtaining system information triggered by a system information change notification through the behavior of network-side devices.

[0266] Step (1): The first cell sends system information on carrierA1. The system information indicates the configuration parameters for a terminal listening to paging on a non-carrierA1 to listen to system information on carrierA1, including: listening duration T (such as the second listening duration).

[0267] Step (2): In the first system information change cycle, the first cell sends a system information change notification; at the beginning of the next system information change cycle of the first system information change cycle, the first cell sends the changed system information and paging messages to terminals listening for paging on non-carrierA1 on carrierA1.

[0268] The first cell can send paging messages on carrier A1 to terminals listening for paging on non-carrier A1 using the configuration parameters broadcast in step (1), for example:

[0269] At the start of the next system information change cycle of the first system information change cycle, the duration for which the first cell sends paging messages on carrier A1 to terminals listening for paging on non-carrier A1 is related to the listening duration T, such as: not shorter than T.

[0270] It should be noted that the above example only applies to terminals listening for paging on carrier A2, i.e., terminals whose paging carrier is different from the carrier periodically broadcast by the system information. For terminals listening for paging on carrier A1, since the carrier periodically broadcast by the system information is the same as the paging carrier, the behavior of existing terminals can be reused.

[0271] Through the embodiments of this application, the occurrence of missed paging calls at the terminal can be reduced while appropriately reducing the repeated transmission of system information on different carriers.

[0272] See Figure 4 , Figure 4 This is a flowchart of an information sending method provided in an embodiment of this application, such as... Figure 4 As shown, the information sending method includes the following steps:

[0273] Step 201: The network-side device transmits system information on the second carrier and sends a paging message to the first terminal on the first carrier;

[0274] Step 202: In the event of a change in system information, the network-side device transmits the changed system information and a paging message to the first terminal on the first carrier; or, in the event of a change in system information, the network-side device transmits the changed system information and a paging message to the first terminal on the second carrier.

[0275] The network-side device is the network-side device corresponding to the first cell, and both the first carrier and the second carrier are downlink carriers of the first cell.

[0276] In one embodiment, sending a paging message to the first terminal on the first carrier can mean that the network-side device sends a paging message to the first terminal on the first carrier when it receives the paging message to the first terminal.

[0277] In one embodiment, transmitting a paging message to the first terminal on the second carrier can mean that the network-side device, upon receiving a paging message to the first terminal, transmits the paging message to the first terminal on the second carrier.

[0278] Optionally, the method further includes:

[0279] The network-side device transmits first system information on the second carrier.

[0280] The first system information is used to instruct the first terminal to perform paging listening on the first carrier, and the first system information is also used to instruct the first terminal to perform system information listening configuration information on the first carrier.

[0281] Optionally, the configuration information indicated by the first system information includes: a first listening duration;

[0282] The system information transmitted on the first carrier after the change and the paging message to the first terminal include:

[0283] A paging message to the first terminal is transmitted on the first carrier.

[0284] During the first listening duration, the system information after the change is transmitted on the first carrier.

[0285] Optionally, the method includes:

[0286] The network-side device transmits first system information on the second carrier.

[0287] The first system information is used to instruct the first terminal to perform paging listening on the first carrier, and the first system information is also used to instruct the first terminal to perform paging message listening on the second carrier.

[0288] Optionally, the configuration information indicated by the first system information includes: a second listening duration;

[0289] The system information transmitted on the second carrier after the change and the paging message to the first terminal include:

[0290] The modified system information is transmitted on the second carrier.

[0291] During the second listening duration, a paging message to the first terminal is sent on the second carrier.

[0292] It should be noted that this embodiment is as a comparison with... Figure 3 The implementation methods of the network-side devices shown in the embodiments can be found in the following examples. Figure 3 The related descriptions of the embodiments shown are not repeated here to avoid repetition.

[0293] The information receiving method provided in this application can be executed by an information receiving device. This application uses an information receiving device executing the information receiving method as an example to illustrate the information receiving device provided in this application.

[0294] The information sending method provided in this application can be executed by an information sending device. This application uses an information sending device executing the information sending method as an example to illustrate the information sending device provided in this application.

[0295] This application provides an information receiving device and / or an information sending device. As an example, the information receiving device or information sending device may be a communication device or a component in a communication device, such as a chip. The communication device may be a terminal, a network-side device, or a server, etc. Exemplarily, the terminal may include, but is not limited to, the type of terminal 11 listed above, and the network-side device may include, but is not limited to, the type of network-side device 12 listed above. This application does not impose specific limitations.

[0296] An information receiving or transmitting device includes a receiving module, a transmitting module, and a processing module. These modules can be implemented in software or hardware. When implemented in hardware, the processing module can be implemented by a processor. For example, the processor can include general-purpose processors, special-purpose processors, etc., such as a Central Processing Unit (CPU), microprocessor, Digital Signal Processor (DSP), Artificial Intelligence (AI) processor, Graphics Processing Unit (GPU), Application Specific Integrated Circuit (ASIC), Network Processor (NP), Field Programmable Gate Array (FPGA), or other programmable logic devices, gate circuits, transistors, discrete hardware components, etc. The receiving and transmitting modules can be implemented by a communication interface, which can include one or more of the following: transceiver, pins, circuits, bus, radio frequency unit, etc.

[0297] For details, see Figure 5 When the information receiving device is a first terminal or a component of the first terminal, the information receiving device 300 includes:

[0298] Processing module 301 is used to listen for paging messages on a first carrier, wherein the first carrier is determined based on first system information received by the first terminal on a second carrier;

[0299] The processing module 301 is further configured to: listen to the paging message and the changed system information on the first carrier when the system information changes; or, listen to the paging message and the changed system information on the second carrier when the system information changes.

[0300] Wherein, both the first carrier and the second carrier are downlink carriers of the first cell.

[0301] Optionally, the processing module is specifically used for:

[0302] If the first condition is met, the paging message and the changed system information are monitored on the first carrier.

[0303] The first condition includes:

[0304] The first terminal receives a first indication message, which is used to indicate a change in system information;

[0305] The first terminal is configured to receive system information on the first carrier.

[0306] Optionally, the processing module is specifically used for:

[0307] If the first condition is not met, the first carrier is monitored to receive the paging message, and if the first terminal needs to monitor system information, the first terminal changes to monitoring the second carrier to receive system information.

[0308] The first condition includes:

[0309] The first terminal receives a first indication message, which is used to indicate a change in system information;

[0310] The first terminal is configured to receive system information on the first carrier.

[0311] Optionally, the processing module is specifically used for:

[0312] If the second condition is met, the paging message and the modified system information are monitored on the second carrier.

[0313] The second condition includes:

[0314] The first terminal receives a first indication message, which is used to indicate a change in system information.

[0315] Optionally, the processing module is specifically used for:

[0316] If the second condition is not met, the first carrier is monitored to receive the paging message, and if the first terminal needs to monitor system information, the first terminal changes to monitoring the second carrier to receive system information.

[0317] The second condition includes:

[0318] The first terminal receives a first indication message, which is used to indicate a change in system information.

[0319] Optionally, the first condition further includes: the first terminal receiving second indication information, the second indication information being used to instruct the first terminal to receive carrier information for system information reception;

[0320] And / or,

[0321] The first indication information and / or the second indication information are received by the first terminal on the first carrier.

[0322] Optionally, the second condition further includes: the first terminal receives second indication information, the second indication information being used to instruct the first terminal to receive carrier information for system information reception;

[0323] And / or,

[0324] The first indication information and / or the second indication information are received by the first terminal on the first carrier.

[0325] Optionally, the device further includes:

[0326] The receiving module is used to receive first system information on the second carrier.

[0327] The first system information is used to instruct the first terminal to perform paging listening on the first carrier, and the first system information is also used to instruct the first terminal to perform system information listening configuration information on the first carrier.

[0328] Optionally, the configuration information indicated by the first system information includes: a first listening duration;

[0329] The processing module is specifically used for:

[0330] The first carrier wave is monitored to receive the paging message and the changed system information;

[0331] If the first terminal acquires the modified system information on the first carrier within the first listening time, then it stops listening for system information on the first carrier; or,

[0332] If the first terminal fails to acquire the modified system information on the first carrier within the first listening time, it will switch to listening to the second carrier to receive the system information.

[0333] Optionally, the device further includes:

[0334] The receiving module is used to receive first system information on the second carrier.

[0335] The first system information is used to instruct the first terminal to perform paging listening on the first carrier, and the first system information is also used to instruct the first terminal to perform paging message listening on the second carrier.

[0336] Optionally, the configuration information indicated by the first system information includes: a second listening duration;

[0337] The processing module is specifically used for:

[0338] During the second listening duration, the second carrier is monitored to receive the paging message and the changed system information; and / or,

[0339] After the second listening duration, the process is changed to listening to the first carrier to receive the paging message.

[0340] Optionally, the device or the first terminal may listen to the paging message and the changed system information on the second carrier while listening to the paging message and the changed system information on the first carrier.

[0341] or,

[0342] The device or the first terminal listens to the paging message and the changed system information on the second carrier while not listening to the paging message and the changed system information on the first carrier.

[0343] See Figure 6 When the information transmitting device is a network-side device or a component of a network-side device, the information transmitting device 400 includes:

[0344] The transmitting module 401 is used to transmit system information on the second carrier and to transmit a paging message to the first terminal on the first carrier.

[0345] The sending module 401 is further configured to: in the event of a change in system information, send the changed system information and a paging message to the first terminal on the first carrier; or, in the event of a change in system information, send the changed system information and a paging message to the first terminal on the second carrier.

[0346] The network-side device is the network-side device corresponding to the first cell, and both the first carrier and the second carrier are downlink carriers of the first cell.

[0347] Optionally, the sending module is further configured to:

[0348] The first system information is transmitted on the second carrier.

[0349] The first system information is used to instruct the first terminal to perform paging listening on the first carrier, and the first system information is also used to instruct the first terminal to perform system information listening configuration information on the first carrier.

[0350] Optionally, the configuration information indicated by the first system information includes: a first listening duration;

[0351] The sending module is specifically used for:

[0352] A paging message to the first terminal is transmitted on the first carrier.

[0353] During the first listening duration, the system information after the change is transmitted on the first carrier.

[0354] Optionally, the sending module is further configured to:

[0355] The first system information is transmitted on the second carrier.

[0356] The first system information is used to instruct the first terminal to perform paging listening on the first carrier, and the first system information is also used to instruct the first terminal to perform paging message listening on the second carrier.

[0357] Optionally, the configuration information indicated by the first system information includes: a second listening duration;

[0358] The sending module is specifically used for:

[0359] The modified system information is transmitted on the second carrier.

[0360] During the second listening duration, a paging message to the first terminal is sent on the second carrier.

[0361] The information receiving device or information sending device provided in the embodiments of this application can achieve... Figure 3 or Figure 4 The various processes implemented in the method embodiments achieve the same technical effect, and will not be described again here to avoid repetition.

[0362] like Figure 7 As shown in the illustration, this application also provides a communication device 500, including a processor 501 and a memory 502. The memory 502 stores programs or instructions that can run on the processor 501. For example, when the communication device 500 is a terminal, the program or instructions executed by the processor 501 implement the various steps of the above-described information receiving method embodiment and achieve the same technical effect. When the communication device 500 is a network-side device, the program or instructions executed by the processor 501 implement the various steps of the above-described information sending method embodiment and achieve the same technical effect. To avoid repetition, further details are omitted here.

[0363] This application embodiment also provides a terminal, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement, for example... Figure 3The steps in the method embodiment shown are illustrated. This terminal embodiment corresponds to the above-described terminal-side method embodiment. All implementation processes and methods of the above-described method embodiments can be applied to this terminal embodiment and achieve the same technical effect. The terminal can be... Figure 5 The information receiving device shown. Specifically, Figure 8 A schematic diagram of the hardware structure of a terminal to implement an embodiment of this application.

[0364] The terminal 600 includes, but is not limited to, at least some of the following components: radio frequency unit 601, network module 602, audio output unit 603, input unit 604, sensor 605, display unit 606, user input unit 607, interface unit 608, memory 609, and processor 610.

[0365] Those skilled in the art will understand that the terminal 600 may also include a power supply (such as a battery) for supplying power to various components. The power supply may be logically connected to the processor 610 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 8 The terminal structure shown does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0366] It should be understood that, in this embodiment, the input unit 604 may include a graphics processor 6041 and a microphone 6042. The graphics processor 6041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 606 may include a display panel 6061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 607 includes at least one of a touch panel 6071 and other input devices 6072. The touch panel 6071 is also called a touch screen. The touch panel 6071 may include two parts: a touch detection device and a touch controller. Other input devices 6072 may include, but are not limited to, a physical keyboard, function keys (such as volume control buttons, power buttons, etc.), a trackball, a mouse, and a joystick, which will not be described in detail here.

[0367] In this embodiment, after receiving downlink data from the network-side device, the radio frequency unit 601 can transmit it to the processor 610 for processing; in addition, the radio frequency unit 601 can send uplink data to the network-side device. Typically, the radio frequency unit 601 includes, but is not limited to, antennas, amplifiers, transceivers, couplers, low-noise amplifiers, duplexers, etc.

[0368] The memory 609 can be used to store software programs or instructions, as well as various data. The memory 609 may primarily include a first storage area for storing programs or instructions and a second storage area for storing data. The first storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 609 may include volatile memory or non-volatile memory. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (Synchlink DRAM, SLDRAM), and direct memory bus RAM (DRRAM). The memory 609 in this embodiment includes, but is not limited to, these and any other suitable types of memory.

[0369] Processor 610 may include one or more processing units; optionally, processor 610 integrates an application processor and a modem processor, wherein the application processor mainly handles operations involving the operating system, user interface, and applications, and the modem processor mainly handles wireless communication signals, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into processor 610.

[0370] Wherein, the terminal is the first terminal, and the processor 610 is used for:

[0371] Listening for paging messages on the first carrier, the first carrier is determined based on the first system information received by the first terminal on the second carrier;

[0372] In the event of a change in system information, the paging message and the changed system information are monitored on the first carrier; or, in the event of a change in system information, the paging message and the changed system information are monitored on the second carrier.

[0373] Wherein, both the first carrier and the second carrier are downlink carriers of the first cell.

[0374] It is understood that the implementation process of each implementation method mentioned in this embodiment can be referred to the method embodiment. Figure 3 The relevant descriptions and the achievement of the same or corresponding technical effects will not be repeated here to avoid duplication.

[0375] This application embodiment also provides a network-side device, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement, for example... Figure 4 The steps of the method embodiment shown are illustrated. This network-side device embodiment corresponds to the above-described network-side device method embodiment. All implementation processes and methods of the above-described method embodiments can be applied to this network-side device embodiment and can achieve the same technical effect.

[0376] Specifically, embodiments of this application also provide a network-side device, which can be... Figure 6 The information transmission device shown. (For example...) Figure 9 As shown, the network-side device 700 includes: an antenna 701, a radio frequency (RF) device 702, a baseband device 703, a processor 704, and a memory 705. The antenna 701 is connected to the RF device 702. In the uplink direction, the RF device 702 receives information through the antenna 701 and transmits the received information to the baseband device 703 for processing. In the downlink direction, the baseband device 703 processes the information to be transmitted and sends it to the RF device 702. The RF device 702 processes the received information and transmits it through the antenna 701.

[0377] The method executed by the network-side device in the above embodiments can be implemented in the baseband device 703, which includes a baseband processor.

[0378] The baseband device 703 may, for example, include at least one baseband board on which multiple chips are disposed, such as... Figure 9 As shown, one of the chips is, for example, a baseband processor, which is connected to the memory 705 via a bus interface to call the program or instructions in the memory 705 to execute the network-side device operations shown in the above method embodiments.

[0379] The network-side device may also include a network interface 706, such as a Common Public Radio Interface (CPRI).

[0380] The radio frequency device 702 is used for:

[0381] System information is transmitted on the second carrier, and a paging message to the first terminal is transmitted on the first carrier.

[0382] The transmitting module is further configured to: transmit the modified system information and the paging message to the first terminal on the first carrier when the system information changes; or, transmit the modified system information and the paging message to the first terminal on the second carrier when the system information changes.

[0383] The network-side device is the network-side device corresponding to the first cell, and both the first carrier and the second carrier are downlink carriers of the first cell.

[0384] Furthermore, the network-side device 700 in this application embodiment also includes: a program or instructions stored in a memory 705 and executable on a processor 704, wherein the processor 704 calls the program or instructions in the memory 705 to execute. Figure 6 The methods executed by each module shown achieve the same technical effect, and to avoid repetition, they will not be described in detail here.

[0385] Specifically, embodiments of this application also provide a network-side device. For example... Figure 10 As shown, the network-side device 800 includes: a processor 801, a network interface 802, and a memory 803. This network-side device can be... Figure 6 The information transmission device shown. The network interface 802 is, for example, a common public radio interface (CPRI).

[0386] Network interface 802 is used for:

[0387] System information is transmitted on the second carrier, and a paging message to the first terminal is transmitted on the first carrier.

[0388] In the event of a change in system information, the changed system information and a paging message to the first terminal are transmitted on the first carrier; or, in the event of a change in system information, the changed system information and a paging message to the first terminal are transmitted on the second carrier.

[0389] The network-side device is the network-side device corresponding to the first cell, and both the first carrier and the second carrier are downlink carriers of the first cell.

[0390] Furthermore, the network-side device 800 in this embodiment of the application also includes: a program or instructions stored in a memory 803 and executable on a processor 801, wherein the processor 801 calls the program or instructions in the memory 803 to execute. Figure 6 The methods executed by each module shown achieve the same technical effect, and to avoid repetition, they will not be described in detail here.

[0391] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described information receiving method or information sending method embodiments and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0392] The processor mentioned above is either the processor in the terminal described in the above embodiments or the processor in the network-side device. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk. In some examples, the readable storage medium may be a non-transient readable storage medium.

[0393] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface and the processor are coupled. The processor is used to run programs or instructions to implement the various processes of the above-described information receiving method or information sending method embodiments, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0394] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0395] This application also provides a computer program / program product, which is stored in a storage medium and executed by at least one processor to implement the various processes of the above-described information receiving method or information sending method embodiments, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0396] This application also provides a wireless communication system, including: a first terminal and a network-side device. The first terminal can be used to execute the steps of the information receiving method applied to the first terminal as described above, and the network-side device can be used to execute the steps of the information sending method applied to the network-side device as described above.

[0397] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0398] From the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of computer software products plus necessary general-purpose hardware platforms, and of course, they can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.), and the computer software product includes several instructions to cause the terminal or network-side device to execute the methods described in the various embodiments of this application.

[0399] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other implementations under the guidance of this application without departing from the spirit and scope of the claims. All of these implementations are within the protection scope of this application.

Claims

1. An information receiving method, characterized in that, include: The first terminal listens for paging messages on the first carrier, and the first carrier is determined based on the first system information received by the first terminal on the second carrier. In the event of a change in system information, the first terminal listens for the paging message and the changed system information on the first carrier; or, in the event of a change in system information, the first terminal listens for the paging message and the changed system information on the second carrier. Wherein, both the first carrier and the second carrier are downlink carriers of the first cell.

2. The method according to claim 1, characterized in that, In the event of a change in system information, the first terminal listens for the paging message and the changed system information on the first carrier wave, including: If the first condition is met, the first terminal listens for the paging message and the changed system information on the first carrier. The first condition includes: The first terminal receives a first indication message, which is used to indicate a change in system information; The first terminal is configured to receive system information on the first carrier.

3. The method according to claim 1 or 2, characterized in that, The method further includes: If the first condition is not met, the first terminal listens to the first carrier to receive the paging message, and if the first terminal needs to listen to system information, the first terminal changes to listening to the second carrier to receive system information. The first condition includes: The first terminal receives a first indication message, which is used to indicate a change in system information; The first terminal is configured to receive system information on the first carrier.

4. The method according to claim 1, characterized in that, In the event of a change in system information, the first terminal listens for the paging message and the changed system information on the second carrier wave, including: If the second condition is met, the first terminal listens for the paging message and the changed system information on the second carrier. The second condition includes: The first terminal receives a first indication message, which is used to indicate a change in system information.

5. The method according to claim 1 or 4, characterized in that, The method further includes: If the second condition is not met, the first terminal listens to the first carrier to receive the paging message, and if the first terminal needs to listen to system information, the first terminal changes to listening to the second carrier to receive system information. The second condition includes: The first terminal receives a first indication message, which is used to indicate a change in system information.

6. The method according to claim 2 or 3, characterized in that, The first condition further includes: the first terminal receiving second indication information, the second indication information being used to instruct the first terminal to receive carrier information for system information reception; And / or, The first indication information and / or the second indication information are received by the first terminal on the first carrier.

7. The method according to claim 4 or 5, characterized in that, The second condition further includes: the first terminal receives second indication information, the second indication information being used to instruct the first terminal to receive carrier information for system information reception; And / or, The first indication information and / or the second indication information are received by the first terminal on the first carrier.

8. The method according to claim 1, 2, 3 or 6, characterized in that, The method includes: The first terminal receives the first system information on the second carrier. The first system information is used to instruct the first terminal to perform paging listening on the first carrier, and the first system information is also used to instruct the first terminal to perform system information listening configuration information on the first carrier.

9. The method according to claim 8, characterized in that, The configuration information indicated by the first system information includes: the first listening duration; The first terminal listens to the paging message and the changed system information on the first carrier, including: The first terminal listens to the first carrier to receive the paging message and the changed system information; If the first terminal acquires the modified system information on the first carrier within the first listening time, then the first terminal stops listening for system information on the first carrier; or, If the first terminal fails to acquire the modified system information on the first carrier within the first listening time, the first terminal will switch to listening to the second carrier to receive the system information.

10. The method according to claim 1, 4, 5 or 7, characterized in that, The method includes: The first terminal receives the first system information on the second carrier. The first system information is used to instruct the first terminal to perform paging listening on the first carrier, and the first system information is also used to instruct the first terminal to perform paging message listening on the second carrier.

11. The method according to claim 10, characterized in that, The configuration information indicated by the first system information includes: the second listening duration; The first terminal listens to the paging message and the changed system information on the second carrier, including: During the second monitoring period, the first terminal monitors the second carrier to receive the paging message and the changed system information; and / or, After the second listening duration, the first terminal switches to listening to the first carrier to receive the paging message.

12. The method according to any one of claims 1-11, characterized in that, The first terminal listens to the paging message and the changed system information on the first carrier while simultaneously listening to the paging message and the changed system information on the second carrier; or, The first terminal listens to the paging message and the changed system information on the second carrier while not listening to the paging message and the changed system information on the first carrier.

13. A method for sending information, characterized in that, include: The network-side equipment transmits system information on the second carrier and a paging message to the first terminal on the first carrier; In the event of a change in system information, the network-side device transmits the changed system information and a paging message to the first terminal on the first carrier; or, in the event of a change in system information, the network-side device transmits the changed system information and a paging message to the first terminal on the second carrier. The network-side device is the network-side device corresponding to the first cell, and both the first carrier and the second carrier are downlink carriers of the first cell.

14. The method according to claim 13, characterized in that, The method further includes: The network-side device transmits first system information on the second carrier. The first system information is used to instruct the first terminal to perform paging listening on the first carrier, and the first system information is also used to instruct the first terminal to perform system information listening configuration information on the first carrier.

15. The method according to claim 14, characterized in that, The configuration information indicated by the first system information includes: the first listening duration; The system information transmitted on the first carrier after the change and the paging message to the first terminal include: A paging message to the first terminal is transmitted on the first carrier. During the first listening duration, the system information after the change is transmitted on the first carrier.

16. The method according to claim 13, characterized in that, The method includes: The network-side device transmits first system information on the second carrier. The first system information is used to instruct the first terminal to perform paging listening on the first carrier, and the first system information is also used to instruct the first terminal to perform paging message listening on the second carrier.

17. The method according to claim 16, characterized in that, The configuration information indicated by the first system information includes: the second listening duration; The system information transmitted on the second carrier after the change and the paging message to the first terminal include: The modified system information is transmitted on the second carrier. During the second listening duration, a paging message to the first terminal is sent on the second carrier.

18. An information receiving device, characterized in that, include: The processing module is used to listen for paging messages on the first carrier, which is determined based on the first system information received by the first terminal on the second carrier. The processing module is further configured to: listen to the paging message and the changed system information on the first carrier when the system information changes; or, listen to the paging message and the changed system information on the second carrier when the system information changes. Wherein, both the first carrier and the second carrier are downlink carriers of the first cell.

19. The apparatus according to claim 18, characterized in that, The processing module is specifically used for: If the first condition is met, the paging message and the changed system information are monitored on the first carrier. The first condition includes: The first terminal receives a first indication message, which is used to indicate a change in system information; The first terminal is configured to receive system information on the first carrier.

20. The apparatus according to claim 18, characterized in that, The processing module is specifically used for: If the second condition is met, the paging message and the modified system information are monitored on the second carrier. The second condition includes: The first terminal receives a first indication message, which is used to indicate a change in system information.

21. An information receiving device, characterized in that, include: The transmitting module is used to transmit system information on the second carrier and to transmit paging messages to the first terminal on the first carrier. The transmitting module is further configured to: transmit the modified system information and the paging message to the first terminal on the first carrier when the system information changes; or, transmit the modified system information and the paging message to the first terminal on the second carrier when the system information changes. The information receiving device is the information receiving device corresponding to the first cell, and the first carrier and the second carrier are both downlink carriers of the first cell.

22. A terminal, characterized in that, It includes a processor and a memory, the memory storing a program or instructions that can run on the processor, the program or instructions being executed by the processor to implement the steps of the information receiving method as described in any one of claims 1 to 12.

23. A network-side device, characterized in that, It includes a processor and a memory, the memory storing a program or instructions that can run on the processor, the program or instructions being executed by the processor to implement the steps of the information transmission method as described in any one of claims 13 to 17.

24. A readable storage medium, characterized in that, The readable storage medium stores a program or instructions that, when executed by a processor, implement the information receiving method as described in any one of claims 1 to 12, or the information sending method as described in any one of claims 13 to 17.

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