System message sending method, device and system

Abstract

The invention discloses a system message sending method, device and system, relates to the technical field of communication, and aims to solve the problems that a terminal has error codes for a long time and the access service rate is suddenly reduced due to the fact that a base station sends an SIB2 with changed information at the front position of a first SI window and the terminal cannot analyze the SIB2 with changed information in the first SI window in time. The method comprises the following steps that: when information in an SIB2 is changed, access network equipment acquires the SIB2, and then sends the SIB2 in a fourth system frame of a first SI window to a terminal. Correspondingly, the terminal receives the SIB2 with changed information in the fourth system frame of the first SI window sent by the access network equipment, and analyzes the SIB2 based on the SIB2 with changed information. The scheme of the invention can be widely applied to the fields of communication technology, artificial intelligence, Internet of Vehicles, smart home networking and the like.

Description

Technical Field

[0001] This application relates to the field of communications, and in particular, to a system message sending method, apparatus, and system. Background Art

[0002] In wireless communications, system messages are messages sent by a base station to a terminal. System messages may include information required for terminal initialization and information related to some other functions / features. Among them, system messages can be divided into a master information block (MIB), a system information block 1 (SIB1), and other system messages. Other system messages include other SIBs except SIB1. Different SIBs provide different information for the terminal. For example, other system messages may include a system information block 2 (SIB2). SIB2 is mainly used to provide the terminal with information related to common radio resource configuration, such as providing uplink frequency point information, multicast broadcast single frequency network (MBSFN) configuration information, etc.

[0003] Among them, the base station may send SIB2 in the first system information (SI) window. Specifically, how to send SIB2 in the first SI window is a problem to be discussed. Summary of the Invention

[0004] Embodiments of this application provide a system message sending method, apparatus, and system, and provide a feasible solution for sending SIB2, so that the terminal can parse SIB2 in the first SI window in time, avoiding the problems of long-term error code of the terminal and sudden drop in access service rate.

[0005] To achieve the above object, this application adopts the following technical solutions:

[0006] In a first aspect, this application provides a system message sending method. This method may be executed by an access network device and a functional module or chip in the access network device. Taking the access network device as an example, this method includes: when the radio resource configuration information in SIB2 changes, the access network device obtains the SIB2 with information change (this SIB2 may be referred to as the changed SIB2). Subsequently, the access network device sends the changed SIB2 in the fourth system frame of the first SI window. In other words, the changed SIB2 is located in the fourth system frame of the first SI window, or SIB2 is carried on the fourth system frame of the first SI window and sent.

[0007] Based on the method described in the first aspect, the access network device sends the SIB2 with changed information in the fourth system frame of the first SI window, that is, sends the SIB2 at a later position in the first SI window, so that the terminal has enough time to receive the SIB2 with changed information. Further, it is ensured that the terminal can parse the SIB2 with changed information in time after parsing the MIB and SIB1, solving the problem that the terminal has long-time error codes and the access service rate drops suddenly due to the inability to parse the SIB2 with changed information in the first SI window in time.

[0008] In this application, the SIB2 includes the information (which can be called radio resource configuration information) specified in the standard for providing common radio resource configuration for the terminal. When the information it includes changes, for example, when the specific value of the radio resource configuration parameter A it includes changes from 1 to 2, the changed radio resource configuration parameter A and its changed specific value are carried in the SIB2 and sent to the terminal. At this time, the SIB2 carrying the changed information can be called the SIB2 with changed information or the changed SIB2, without limitation.

[0009] Optionally, based on the different specific values of the configuration information carried in the SIB2, the SIB2 is sent through different subframes in the fourth system frame of the first SI window. Specifically, the fourth system frame of the first SI window through which the SIB2 is sent includes the following several possible design methods:

[0010] In a possible design, the radio resource configuration information in the SIB2 includes MBSFN configuration information. In this scenario, the SIB2 is located in at least one of the subframes 0, 4, 5, and 9 of the fourth system frame of the first SI window.

[0011] Optionally, in this application, the MBSFN configuration information can be used to indicate that the terminal accesses multimedia broadcast multicast services. At this time, the access network device configures MBSFN subframes. The MBSFN subframe is a special subframe specified by the radio communication protocol and refers to the subframe used to send broadcast messages to multiple terminals. When the base station configures MBSFN subframes, the subframes for the base station to send other SIs should avoid the MBSFN subframes. The MBSFN subframes include at least one of the following: subframe 1, subframe 2, subframe 3, subframe 6, subframe 7, or subframe 8.

[0012] Based on this possible design, when the access network device configures MBSFN subframes and the radio resource configuration information in SIB2 includes MBSFN configuration information, a possible subframe number of the SIB2 with information change located in the fourth system frame of the first SI window is given, so that this solution is applicable to the standard wireless communication protocol. At the same time, the SIB2 with information change is located in at least one subframe of the fourth system frame of the first SI window, which improves the probability that the terminal successfully resolves the SIB2 with information change.

[0013] In a possible design, the radio resource configuration information in SIB2 includes non-MBSFN configuration information, and this SIB2 is located in at least one of subframe 0, subframe 1, subframe 2, and subframe 3 of the fourth system frame of the first SI window.

[0014] Optionally, in this application, the non-MBSFN configuration information can be used to instruct the terminal to access other services except for multimedia broadcast multicast services. At this time, the access network device does not configure MBSFN subframes.

[0015] Based on this possible design, when the access network device does not configure MBSFN subframes and the radio resource configuration information in SIB2 includes non-MBSFN configuration information, a possibility that the SIB2 with information change is located in consecutive subframes of the fourth system frame of the first SI window is given, achieving the purpose that the SIB2 with information change is located in the fourth system frame of the first SI window. At the same time, the SIB2 with information change is located in at least one of the consecutive subframes of the fourth system frame of the first SI window, which improves the probability that the terminal successfully resolves the changed SIB2.

[0016] In a possible design, the radio resource configuration information in SIB2 includes non-MBSFN configuration information, and this SIB2 is located in at least one of subframe 0, subframe 2, subframe 5, and subframe 9 of the fourth system frame of the first SI window.

[0017] Based on this possible design, when the radio resource configuration information in SIB2 includes non-MBSFN configuration information, a possibility that the SIB2 with information change is located in non-consecutive subframes of the fourth system frame of the first SI window is given, achieving the purpose that the SIB2 with information change is located in the fourth system frame of the first SI window. At the same time, the SIB2 with information change is located in at least one of the non-consecutive subframes of the fourth system frame, which improves the probability that the terminal successfully resolves the changed SIB2.

[0018] In a possible design, the SIB2 information includes non-MBSFN configuration information, and the SIB2 is located in any one or more subframes of the fourth system frame in the first SI window.

[0019] Based on this possible design, when the radio resource configuration information in the SIB2 includes non-MBSFN configuration information, the possible subframe positions of the SIB2 with information changes in the fourth system frame of the first SI window are given, which not only achieves the purpose that the SIB2 with information changes is located in the fourth system frame of the first SI window, but also improves the utilization rate of this solution.

[0020] In a second aspect, the present application provides a method for sending system messages. This method can be executed by a terminal and functional modules or chips within the terminal. Taking the terminal as an example, this method includes: the terminal receives the SIB2 with information changes on the fourth system frame of the first SI window and parses the SIB2.

[0021] Optionally, based on the specific values of the configuration information carried in the SIB2, the SIB2 can be located in different subframes of the fourth system frame in the first SI window. Specifically, the design methods of the SIB2 in different subframes of the fourth system frame can be referred to the above first aspect or the possible designs in the first aspect, which will not be elaborated here.

[0022] Based on the method described in the second aspect, the terminal can timely receive the SIB2 with information changes in the fourth system frame of the first SI window, and based on the received SIB2 with information changes, timely parse the SIB2 with changes, solving the problem that the terminal causes long-term error codes and sudden drops in access service rates due to the inability to timely parse the SIB2 with information changes.

[0023] In a third aspect, the present application provides a communication device. This communication device can be an access network device or a chip or system-on-chip in the access network device, and can also be a functional module in the access network device for implementing the method in the first aspect or any possible design in the first aspect. This communication device can implement the functions performed by the access network device in the above first aspect or possible designs in the first aspect, and the functions can be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions. For example: the communication device can include a processing unit and a transceiver unit. Among them,

[0024] The processing unit is used to obtain the SIB2 when the system message block SIB2 has information changes;

[0025] The transceiver unit is used to send the SIB2, and the SIB2 is located in the fourth system frame of the first system message SI window.

[0026] Specifically, the relevant description of SIB2 can be referred to in the first aspect or any possible design of the first aspect. At the same time, the execution actions of each unit of the communication device can be referred to in the first aspect or any possible design of the first aspect, which will not be elaborated here.

[0027] In a fourth aspect, the present application provides a communication device, which can be an access network device or a chip or system-on-chip in the access network device. The communication device can implement the functions performed by the access network device in the above first aspect or any possible design of the first aspect, and the functions can be implemented by hardware. In a possible design, the communication device includes a processor and a communication interface. Among them, the processor and the communication interface are used to support the communication device to execute the system message sending method in the first aspect or any possible design of the first aspect. In another possible design, the communication device may further include a memory, which is used to store necessary computer execution instructions and data of the communication device. When the communication device runs, the processor executes the computer execution instructions stored in the memory, so that the communication device executes the system message sending method as described in the above first aspect or any possible design of the first aspect.

[0028] In a fifth aspect, the present application provides a communication device, which can be a terminal or a chip or system-on-chip in the terminal, or a functional module in the terminal for implementing the method in the second aspect or any possible design of the second aspect. The communication device can implement the functions performed by the terminal in the above aspects or any possible design, and the functions can be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions. For example, the communication device may include a transceiver unit and a processing unit. Among them,

[0029] The transceiver unit is used to receive SIB2 with changed information, and the SIB2 is located in the fourth system frame of the first system information (SI) window;

[0030] The processing unit is used to parse the SIB2.

[0031] Specifically, the relevant description of SIB2 with changed information can be referred to in the second aspect or any possible design of the second aspect. At the same time, the execution actions of each unit of the communication device can be referred to in the second aspect or any possible design of the second aspect, which will not be elaborated here.

[0032] Sixth aspect, the present application provides a communication device, which can be a terminal, a chip in the terminal, or a system-on-chip. The communication device can implement the functions performed by the terminal in the above aspects or any possible designs, and the functions can be implemented by hardware. In a possible design, the communication device includes a processor and a communication interface. Among them, the processor and the communication interface are used to support the communication device to execute the system message sending method in the second aspect or any possible design of the second aspect. In another possible design, the communication device may further include a memory, which is used to store necessary computer-executable instructions and data of the communication device. When the communication device runs, the processor executes the computer-executable instructions stored in the memory, so that the communication device executes the system message sending method in the above second aspect or any possible design of the second aspect.

[0033] Seventh aspect, the present application provides a communication system, which includes the communication device provided in the third aspect or the fourth aspect, or the communication system includes the communication device provided in the fifth aspect or the sixth aspect.

[0034] Eighth aspect, the present application provides a computer-readable storage medium, which stores computer instructions. When the computer instructions run on a computer, the computer is enabled to execute the system message sending method in the first aspect or any possible design of the first aspect; or, the computer is enabled to execute the system message sending method in the second aspect or any possible design of the second aspect.

[0035] Ninth aspect, the present application provides a computer program product, which includes computer instructions. When the computer instructions run on a computer, the computer is enabled to execute the system message sending method in the first aspect or any possible design of the first aspect; or, the computer is enabled to execute the system message sending method in the second aspect or any possible design of the second aspect.

[0036] Among them, for the technical effects brought by any design method in the third aspect and the fourth aspect, reference can be made to the technical effects brought by the first aspect or any possible design of the first aspect, which will not be elaborated here. For the technical effects brought by any design method in the fifth aspect and the sixth aspect, reference can be made to the technical effects brought by the second aspect or any possible design of the second aspect, which will not be elaborated here. For the technical effects brought by any design method in the seventh aspect to the ninth aspect, reference can be made to the technical effects brought by the first aspect or any possible design of the first aspect, or, for the technical effects brought by any design method in the seventh aspect to the ninth aspect, reference can be made to the technical effects brought by the second aspect or any possible design of the second aspect, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the position of a system message;

[0038] Figure 2 It is a schematic diagram of the period of SIB2;

[0039] Figure 3 It is a schematic diagram of a communication system provided by an embodiment of the present application;

[0040] Figure 4 It is a schematic flow diagram of a system message sending method provided by an embodiment of the present application;

[0041] Figure 5 It is a schematic diagram of the position of SIB2 provided by an embodiment of the present application;

[0042] Figure 6 It is a schematic diagram of the position of SIB2 provided by an embodiment of the present application;

[0043] Figure 7 It is a schematic diagram of the position of SIB2 provided by an embodiment of the present application;

[0044] Figure 8 It is a schematic diagram of the position of SIB2 provided by an embodiment of the present application;

[0045] Figure 9 It is a schematic flow diagram of a system message sending method provided by an embodiment of the present application;

[0046] Figure 10 It is a schematic flow diagram of a system message sending method provided by an embodiment of the present application;

[0047] Figure 11 It is a schematic diagram of the structure of a communication device provided by an embodiment of the present application;

[0048] Figure 12 It is a schematic diagram of the structure of a communication device provided by an embodiment of the present application;

[0049] Figure 13 It is a schematic diagram of the structure of a communication device provided by an embodiment of the present application. Detailed implementation manners

[0050] Before introducing the embodiments of the present application, some technical terms related to the embodiments of the present application are explained. It should be noted that the following explanations are for the purpose of making the embodiments of the present application easier to understand, and should not be regarded as a limitation on the protection scope required by the embodiments of the present application.

[0051] System information is the information sent by the base station to the terminal. The system information may include the information required for terminal initialization and the information related to some other functions / features. When the terminal accesses a cell or the broadcast message sent by the base station changes, the base station will send system information to help the terminal update or correct its current state and complete the corresponding communication services and physical processes. The system information can be divided into minimum system information (minimum SI) and other system information (other SI). The minimum system information consists of the master information block (MIB) and the system information block 1 (SIB1), and SIB1 is also called the remaining minimum system information (RMSI). The other system information consists of other system information blocks (SIB), such as SIB2 - SIB13, etc.

[0052] Optionally, the time-domain resources used by the base station to send system information are in units of radio frames. In other words, the system information can be carried on the radio frames and sent, for example, the MIB, SIB1 or other SIBs, such as SIB2, can be carried on the radio frames and sent. Among them, the radio frames carrying the system information can form an SI window, and the positions of different system information on the radio frames can be the same or different, without limitation.

[0053] In this application, the radio frame can also be simply referred to as a frame or a system frame, without limitation. Each radio frame includes 10 subframes, the duration of each subframe is 1 millisecond (ms), and the duration of each radio frame is 10 ms. The radio frame can also be called a system frame. It should be understood that in this application, the radio frames can be numbered to identify the radio frames. For example, the radio frames can be numbered continuously with natural numbers. The first radio frame can be numbered as radio frame 0, the second radio frame can be numbered as radio frame 1,..., and so on. The nth radio frame can be numbered as radio frame n - 1. At this time, the nth radio frame can also be called the (n - 1)th system frame, and the (n - 1)th system frame can be simply referred to as the (n - 1)th frame, without limitation. Similarly, the subframes included in each radio frame can also be numbered continuously with natural numbers. Taking the radio frame including 10 subframes as an example, the first subframe can be numbered as subframe 0 or the 0th subframe, the second subframe can be numbered as subframe 1 or the 1st subframe,..., and so on. The 10th subframe can be numbered as subframe 9 or the 9th subframe.

[0054] In this application, the MIB carries the most basic information, which is related to the decoding of the physical downlink shared channel (PDSCH). Only after the terminal decodes the MIB can it use the parameters in the MIB to continue decoding the data in the PDSCH, including decoding the SIB. Therefore, the base station will first send the MIB and then send a series of SIBs. The MIB is periodically broadcast on the broadcast channel (BCH). The wireless communication protocol stipulates that the period of the MIB is 40 ms, and all MIBs are sent in subframe 0. If the system frame number (SFN) satisfies the condition (SFN mod 4 = 0), then the 0th subframe of this system frame is the first transmission of the MIB, and the MIBs at the other three 0th subframe moments within the same MIB period are repeated transmissions, that is, the physical layer of the base station sends the MIB once every 10 ms. As long as the terminal receives the MIB in any 0th subframe, it can decode independently without waiting to receive all 4 MIB blocks before decoding.

[0055] It should be noted that the information carried in the MIB is only a very limited part of the system information, and most of the system information still needs to be sent through SIB blocks. After sending the MIB, the base station will continue to send several different types of SIBs, which provide the terminal with several parameters required for cell residence, retransmission, link establishment, etc. The most important of all SIBs is SIB1, because in addition to carrying the parameters required for the terminal to access the cell, SIB1 also carries the scheduling information of other SIBs. If the terminal cannot decode SIB1, it cannot decode other SIBs. Based on this, the basic process for the terminal to obtain system information is that the terminal first obtains the MIB, obtains SIB1 according to the scheduling information in the MIB, and then obtains other SIBs according to the scheduling information in SIB1.

[0056] In this application, SIB1 mainly carries information related to cell access and cell selection, as well as time division long term evolution (TDD-LTE) subframe configuration, scheduling information and window information of other SIBs, etc. The base station broadcasts SIB1 periodically through the SystemInformationBlockType1 message. The wireless communication protocol stipulates that the period of SIB1 is 80 ms, and all SIB1s are sent in subframe 5. Similar to the transmission mechanism of MIB, SIB1 is also repeatedly sent 4 times within 80 ms. If the system frame number SFN meets the condition (SFN mod 8 = 0), it is considered that the 5th subframe of this system frame is the first time to send SIB1 of this period, and then SIB1 is repeatedly sent on the 5th subframes of other system frame numbers that meet the condition (SFN mod 2 = 0) within the same SIB1 period.

[0057] In this application, SIB2 mainly carries information related to common radio resource configuration (such as resource allocation and scheduling of physical uplink control channel (PUCCH), physical uplink shared channel (PUSCH), sounding reference signal (SRS), etc.), timers and constants (such as the parameter setting value of the RRC connection establishment timer is 200 ms), frequency information (such as uplink frequency point information), MBSFN configuration and other information. The information carried in SIB2 is important for the terminal to analyze the current system uplink and downlink resource usage and network resource problems. Therefore, the wireless communication protocol stipulates that SIB2 is sent in the first SI window. Optionally, the subframe for sending SIB2 cannot include MBSFN subframes. MBSFN subframes are special subframes stipulated by the wireless communication protocol, which refer to subframes used to send broadcast messages to multiple terminals. When the base station configures MBSFN subframes, the subframes for the base station to send other SIs should avoid MBSFN subframes. MBSFN subframes include at least one of the following: subframe 1, subframe 2, subframe 3, subframe 6, subframe 7, or subframe 8.

[0058] The SI window, the transmission opportunity of each SI is restricted within an independent window, which is also called the SI window. Each SI corresponds to an SI window, and these different SI windows do not overlap. Within an SI window, only the SI corresponding to this SI window will be transmitted, and other SIs will not be sent. The lengths of all SI windows are equal, and the window length value of the SI can be configured in SIB1. For example, configure the length of each SI window to be 40 ms in SIB1, or configure the length of each SI window to be 80 ms in SIB1, or configure the length of the SI window to be 160 ms. Within an SI window, the SIB corresponding to this SI window can be sent multiple times and can be sent in any subframe. For example, within an SI window, the SI can be continuously sent in multiple subframes or skip a certain subframe without sending.

[0059] For example, taking the length of the SI window as 40 ms as an example, Figure 1 shows 4 radio frames, as Figure 1 shown, the 4 radio frames can be sequentially numbered as frame No. 0, frame No. 1, frame No. 2, and frame No. 3. Each subframe in the 4 radio frames includes subframe No. 0 - subframe No. 9, a total of 10 subframes. These 4 radio frames form an SI window with an SI window length of 40 ms. As Figure 1 shown, the MIB is sent in subframe No. 0 of all system frames in the first SI window. The MIB in subframe No. 0 of frame No. 0 is the first transmitted MIB. The MIBs sent in subframe No. 0 of other system frames in the first SI window have the same message as the first transmitted MIB. The SIB1 is sent in subframe No. 5 of frame No. 0 and subframe No. 5 of frame No. 2 in the SI window. The SIB1 in subframe No. 5 of frame No. 0 is the first transmitted SIB1. The SIB1 sent in subframe No. 5 of frame No. 2 has the same message as the first transmitted SIB1. As Figure 1 shown, the SIB2 is sent in subframe No. 0, subframe No. 4, subframe No. 9 of frame No. 0, and subframe No. 0 of frame No. 1 in the first SI window. The subframe numbers for sending SIB2 in the first SI window do not include subframe No. 5 of frame No. 0 and subframe No. 5 of frame No. 2 occupied by SIB1. Figure 1 In, the period of SIB2 is 160 ms. After the terminal successfully parses the MIB and SIB1, it can receive and parse SIB2. When the terminal successfully parses SIB1 only in subframe No. 5 of frame No. 2, but since there is no SIB2 after SIB1, the terminal cannot receive and parse SIB2.

[0060] Again, taking the length of the SI window as 40 ms as an example, Figure 2 shows 17 radio frames, as Figure 2As shown, the period of SIB2 is 160 ms. When the terminal fails to parse SIB2 in subframe 0 of frame 0, it needs to wait for 160 ms before it can parse SIB2 again in subframe 0 of frame 16.

[0061] Therefore, when the base station changes SIB2, the terminal needs to successfully parse the MIB and SIB1 and then parse the changed SIB2 after the channel transformation duration. At this time, if the base station sends the changed SIB2 at the front position of the first SI window (for example, in frame 0 of the first SI window), the terminal may not be able to parse the changed SIB2 in the first SI window because the channel has not been successfully transformed, and it needs to wait for at least one SIB2 period to parse the changed SIB2 in the first SI window, resulting in long-term error codes of the terminal and a sudden drop in the access service rate.

[0062] To solve the above problems, the present application provides a system message sending method, which includes: when the radio resource configuration information in SIB2 changes, the access network device (such as a base station) obtains SIB2, and then sends the SIB2 in the fourth system frame of the first SI window to the terminal. Correspondingly, the terminal receives the SIB2 with changed radio resource configuration information sent by the access network device in the fourth system frame of the first SI window, and parses the SIB2 based on the SIB2 with changed information. In this way, the access network device sends the SIB2 with changed information in the fourth system frame of the first SI window, so that the terminal has enough time to transform the channel. Further, it is ensured that the terminal can timely parse the SIB2 with changed information, solving the problem that the terminal cannot timely parse the SIB2 with changed information in the first SI window, resulting in long-term error codes and a sudden drop in the access service rate.

[0063] The following describes the system message sending method provided by the embodiments of the present application with reference to the accompanying drawings of the specification.

[0064] The technical solution of the embodiment of the present application can be applied to various communication systems. The communication system can be a third generation partnership project (3GPP) communication system, for example, a long term evolution (LTE) system, or a fifth generation (5G) mobile communication system, a new radio (NR) system, a beyond 5G (B5G) mobile communication system, a 6th-generation (6G) mobile communication system, a new radio vehicle to everything (NR V2X) system. It can also be applied to a system with hybrid networking of LTE and 5G, or a device-to-device (D2D) communication system, a machine-to-machine (M2M) communication system, the Internet of Things (IoT), and other next-generation communication systems. It can also be a non-3GPP communication system, without limitation. The following takes Figure 3 the communication system shown as an example to describe the system message sending method provided by the embodiment of the present application.

[0065] The technical solution of the embodiment of the present application can be applied to various communication scenarios, for example, one or more of the following communication scenarios: enhanced mobile broadband (eMBB), ultra reliable low latency communication (URLLC), machine type communication (MTC), massive machine type communications (mMTC), D2D, V2X, and IoT communication scenarios.

[0066] Figure 3 is a schematic diagram of a communication system provided by the embodiment of the present application. As Figure 3 shown, the communication system 30 includes a terminal and an access network device. It can be understood that devices in the communication system 30 can communicate directly or through the forwarding of other devices. The embodiment of the present application does not make specific limitations on this.

[0067] It can be understood that the above Figure 3 is only a schematic diagram and does not constitute a limitation on the applicable scenarios of the technical solution provided by the present application. Those skilled in the art should understand that in the specific implementation process, the communication system 30 may also include more thanFigure 3 fewer devices as shown, or the communication system 30 may further include other devices, and the number of devices in the communication system 30 can also be determined according to specific needs without limitation. The devices in the system shown below will be described. Figure 3 The devices in the system shown will be described.

[0068] The terminal can be a terminal device, a user equipment (UE), a mobile station (MS), a mobile terminal (MT), etc., including handheld devices, vehicle-mounted devices, wearable devices or computing devices with wireless communication functions. Specifically, the terminal can be a mobile phone, a tablet computer or a computer with wireless transceiver functions, and can also be a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in remote medical treatment, a wireless terminal in smart grid, a wireless terminal in smart city, a smart home, a vehicle-mounted terminal, etc. In the embodiments of the present application, the device for implementing the functions of the terminal can be the terminal or a device capable of supporting the terminal to implement the functions, such as a chip system (for example, a chip or a processing system composed of multiple chips) or a modem. Taking the device for implementing the functions of the terminal as the terminal as an example, the system message sending method provided by the embodiments of the present application will be described.

[0069] An access network device is mainly used to implement functions such as resource scheduling, radio resource management, and radio access control of terminals. It is a device in a radio access network (RAN) that connects terminals to a wireless network. The RAN can be connected to a core network (for example, it can be the core network of LTE or the core network of 5G, etc.). The access network device can be an evolved Node B (eNB or eNodeB) in LTE, or a base station in a 5G network or a future evolved public land mobile network (PLMN), a broadband network gateway (BNG), an aggregation switch, or a non-3GPP access device; or the access network device in the embodiments of the present application can also be a radio controller in a cloud radio access network (CRAN); or a transmission and reception point (TRP), or a device including a TRP, etc. The embodiments of the present application do not make specific limitations on this. Optionally, the access network device in the embodiments of the present application can include various forms of base stations, such as: macro base stations, micro base stations (also called small stations), relay stations, access points, etc. The embodiments of the present application do not make specific limitations on this. In the embodiments of the present application, the device for implementing the functions of the access network device can be the access network device, or a device capable of supporting the access network device to implement such functions, such as a chip system (for example, a single chip or a processing system composed of multiple chips) or a modem. The following takes the device for implementing the functions of the access network device being a base station as an example to describe the system message sending method provided by the embodiments of the present application.

[0070] Optionally, Figure 3 Each device (such as a terminal, an access network device) in can also be referred to as a communication device, which can be a general device or a dedicated device. The embodiments of the present application do not make specific limitations on this.

[0071] Optionally, in the present application Figure 3 The relevant functions of each device can be implemented by one device, or jointly implemented by multiple devices, or implemented by one or more functional modules in one device. The embodiments of the present application do not make specific limitations on this. It can be understood that the above functions can be network elements in a hardware device, or software functions running on dedicated hardware, or a combination of hardware and software, or virtualized functions instantiated on a platform (for example, a cloud platform).

[0072] Next, in combination with Figure 3The communication system shown below describes the system message sending method provided in the embodiments of the present application. Actions and terms involved among the following embodiments can be referred to each other. The message names or parameter names in the messages exchanged between devices in each embodiment are only examples, and other names can also be used in specific implementations. For example, "corresponding" in the following embodiments can be replaced with "associated", etc.

[0073] Figure 4 It is a schematic flowchart of a system message sending method provided in the embodiments of the present application. As Figure 4 shown, it may include:

[0074] S401: When the information in SIB2 changes in the access network device, obtain SIB2.

[0075] In the present application, the information in SIB2 can be replaced with wireless resource configuration information, which is used to provide wireless resource configuration for the terminal. The information in SIB2 may include, but is not limited to, parameters such as threshServingLowQ, mac-ContentionResolutionTimer, and ra-ResponseWindowSize value. The specific meanings of the information in SIB2 and the information it includes can be referred to the existing standards and will not be elaborated here. The change of the information in SIB2 can be understood as the change of the wireless resource configuration information in SIB2. The wireless resource configuration information includes wireless resource configuration parameters and the specific values (value) of the wireless resource configuration parameters. The change of the wireless resource configuration information can be understood as the change of the wireless resource configuration parameters and / or the change of the specific values of the wireless resource configuration parameters.

[0076] Optionally, the change of the wireless resource configuration parameters includes, but is not limited to, the deletion or addition of the wireless resource configuration parameters in SIB2 in the current SI period compared with those in the previous SI period. The change of the specific value of the wireless resource configuration parameter can be understood as that the current specific value of the wireless resource configuration parameter is different from the specific value before the current moment. The current period can refer to Figure 4 the SI period for sending SI in the method shown, and the previous SI period can refer to the SI period adjacent to the current SI period and earlier in time. The current specific value of the wireless resource configuration parameter can refer to the specific value of the wireless resource configuration parameter in the current SI period, and the specific value of the wireless resource configuration parameter before the current moment can refer to the specific value of the wireless resource configuration parameter in the previous SI period.

[0077] Optionally, the access network device may adaptively configure the radio resource configuration parameters included in SIB2 and the specific values of the radio resource configuration parameters according to the network communication situation between the access network device and the terminal and / or preset communication requirements. The radio resource configuration parameters included in SIB2 and the specific values of the radio resource configuration parameters in each SI period configured by the access network device may be the same or different. At this time, the access network device may compare the information included in SIB2 in two adjacent SI periods before and after, and determine whether the information in SIB2 has changed according to the comparison result. If it has changed, then S401 is executed.

[0078] For example, assume that in SI period T1, SIB2 includes the threshServingLowQ parameter, and the specific value of the threshServingLowQ parameter is 10 dB. Subsequently, in SI period T2, the radio resource configuration parameters in SIB2 remain unchanged and still include the threshServingLowQ parameter, but the specific value of the threshServingLowQ parameter is not 10 dB. At this time, compared with SIB2 in SI period T1, the specific value of the threshServingLowQ parameter in SIB2 in SI period T2 has changed, and it is the SIB2 with information change.

[0079] In this application, the SIB2 with information change may be alternatively described as the changed SIB2, without limitation.

[0080] Further, the access network device may configure transmission resources for the changed SIB2. For example, the fourth system frame in the first SI window is configured for the changed SIB2, so as to send SIB2 in the fourth system frame in the first SI window.

[0081] S402: The access network device sends SIB2 in the fourth system frame in the first SI window.

[0082] In this application, the first SI window corresponds to the first SI window in each SI period. The SI period may refer to the time interval between two adjacent SI transmissions. The SI period may include one or more SI windows. For example, assume that the SI period is 160 ms and the length of each SI window is 40 ms. Then this SI period may include four SI windows. The first SI window in the first SI period corresponds to 0 - 40 ms; the first SI window in the second SI period corresponds to 160 ms - 200 ms, etc.

[0083] Optionally, the first SI window described in S402 may refer to the first SI window or the first SI window in the current SI period.

[0084] Optionally, the fourth system frame in the first SI window corresponds to the fourth system frame transmitted in sequence in the first SI window. The fourth system frame may include multiple radio frames, such as 10 radio frames, etc. This application does not limit the naming of the system frame and the fourth system frame in the first SI window. For example, the system frame can be alternatively described as a radio frame, or the system frame can be abbreviated as a frame. Or, when naming the system frames in the first SI window starting from the 0th system frame, the fourth system frame in the first SI window can be called the 3rd system frame in the first SI window, or the 3rd radio frame, or can also be abbreviated as the 3rd frame, without limitation.

[0085] Optionally, the access network device may send SIB2 on the subframes included in the fourth system frame in the first SI window according to the information included in SIB2. When the information included in SIB2 is different, the subframes of the fourth system frame in the first SI window corresponding to SIB2 are different. Specifically, on which subframe in the fourth system frame to send the changed SIB2 may be specified by the protocol, or configured and indicated by the base station to the terminal, without limitation.

[0086] In a possible design, when the access network device configures MBSFN subframes and the changed SIB2 includes MBSFN configuration information, at this time, the subframe in the fourth system frame in the first SI window where the changed SIB2 is located meets the following requirements: this subframe does not include MBSFN subframes and the subframes occupied by SIB1, that is, this subframe is other subframes in the fourth system frame except for MBSFN subframes and the subframes occupied by SIB1. The MBSFN subframe is a special subframe specified by the radio communication protocol, which refers to the subframe used to send broadcast messages to multiple terminals and includes at least one of the following: subframe 1, subframe 2, subframe 3, subframe 6, subframe 7, or subframe 8. The radio communication protocol stipulates that when the base station configures MBSFN subframes, the subframes for the base station to send other SIs should avoid MBSFN subframes.

[0087] At the same time, the subframe in the fourth system frame in the first SI window where the changed SIB2 is located may be one subframe or multiple subframes. When the changed SIB2 is located in multiple subframes in the fourth system frame in the first SI window, the multiple subframes may be multiple consecutive subframes, or multiple non - consecutive subframes.

[0088] When the changed SIB2 is located in one subframe of the fourth system frame in the first SI window, this subframe may be any one of subframe 0, subframe 4, subframe 5, and subframe 9 of the fourth system frame in the first SI window.

[0089] Exemplarily, assume that each SI window length is configured as 40 ms in SIB1, and each SI window includes 4 system frames. At this time, the changed SIB2 is located in subframe 0 of the fourth system frame in the first SI window, or the changed SIB2 is located in subframe 4 of the fourth system frame in the first SI window, or the changed SIB2 is located in subframe 5 of the fourth system frame in the first SI window, or the changed SIB2 is located in subframe 9 of the fourth system frame in the first SI window.

[0090] In the case where the changed SIB2 is located in multiple subframes of the fourth system frame in the first SI window, the multiple subframes can be multiple subframes among subframe 0, subframe 4, subframe 5, and subframe 9 of the fourth system frame in the first SI window. For example, the changed SIB2 can be located in subframe 0 and subframe 4 of the fourth system frame in the first SI window; or the changed SIB2 can be located in subframe 4 and subframe 5 of the fourth system frame in the first SI window.

[0091] Exemplarily, as Figure 5 shown, assume that each SI window length is configured as 40 ms in SIB1, and each SI window includes 4 system frames. When naming the system frames in the first SI window starting from frame 0, the changed SIB2 is located in subframe 0, subframe 4, subframe 5, and subframe 9 of the third frame in the first SI window.

[0092] Among them, the MBSFN configuration information can be used to indicate that the terminal accesses multimedia broadcast multicast service. At this time, the access network device configures MBSFN subframes. The MBSFN subframe is a special subframe specified by the wireless communication protocol, which refers to the subframe used to send broadcast messages to multiple terminals. The wireless communication protocol stipulates that when the base station configures MBSFN subframes, the subframes for the base station to send other SIs should avoid MBSFN subframes. The MBSFN subframe includes at least one of the following: subframe 1, subframe 2, subframe 3, subframe 6, subframe 7, or subframe 8. Corresponding to the MBSFN configuration information, there is also non-MBSFN configuration information, which can be used to indicate that the terminal does not access multimedia broadcast multicast service. At this time, the access network device does not configure MBSFN subframes.

[0093] In another possible design, when the access network device does not configure MBSFN subframes and the changed SIB2 includes non-MBSFN configuration information, that is, the changed SIB2 does not include MBSFN configuration information. At this time, the changed SIB2 is located in the subframes of the fourth system frame in the first SI window, and the subframe can be one subframe or multiple subframes. Among them, the multiple subframes can be multiple consecutive subframes, or multiple non-consecutive subframes.

[0094] Specifically, the possible design methods may include the following:

[0095] In the case where the changed SIB2 is located in any subframe of the fourth system frame in the first SI window, the subframe may be any subframe of the fourth system frame in the first SI window.

[0096] Exemplarily, assuming that in SIB1, the length of each SI window is configured to be 40 ms, each SI window includes 4 system frames, and the system frames in the first SI window are named starting from frame No. 0, the changed SIB2 may be located in subframe 0 of frame No. 3 in the first SI window, or the changed SIB2 may be located in subframe 8 of frame No. 3 in the first SI window, or the changed SIB2 may be located in subframe 3 of frame No. 3 in the first SI window.

[0097] In the case where the changed SIB2 is located in any number of subframes of the fourth system frame in the first SI window, the number of subframes may be at least one subframe of the fourth system frame in the first SI window.

[0098] Exemplarily, assuming that in SIB1, the length of each SI window is configured to be 40 ms, each SI window includes 4 system frames, and the system frames in the first SI window are named starting from frame No. 0, as Figure 6 shown, the changed SIB2 may be located in any 4 subframes of frame No. 3 in the first SI window.

[0099] In the case where the changed SIB2 is located in any number of subframes of the fourth system frame in the first SI window, the any number of subframes may be any number of consecutive subframes of the fourth system frame in the first SI window. For example, the changed SIB2 is located in the first three consecutive subframes of the fourth system frame in the first SI window, or the changed SIB2 is located in the last two consecutive subframes of the fourth system frame in the first SI window, or the changed SIB2 is located in the middle four consecutive subframes of the fourth system frame in the first SI window.

[0100] Exemplarily, assuming that in SIB1, the length of each SI window is configured to be 40 ms, each SI window includes 4 system frames, and the system frames in the first SI window are named starting from frame No. 0, as Figure 7 shown, the changed SIB2 may be located in subframe 0, subframe 1, subframe 2, and subframe 3 of frame No. 3 in the first SI window.

[0101] In the case where the changed SIB2 is located in any number of subframes of the fourth system frame in the first SI window, the any number of subframes can be any number of discontinuous subframes of the fourth system frame in the first SI window. For example, the changed SIB2 is located in multiple even subframes of the fourth system frame in the first SI window, or the changed SIB2 is located in multiple odd subframes of the fourth system frame in the first SI window.

[0102] Exemplarily, assuming that each SI window length is configured as 40 ms in SIB1, and each SI window includes 4 system frames. When naming the system frames in the first SI window starting from frame No. 0, as Figure 8 shown, the changed SIB2 can be located in subframe No. 0, subframe No. 2, subframe No. 5, and subframe No. 9 of frame No. 3 in the first SI window.

[0103] S403: The terminal receives SIB2 in the fourth system frame in the first SI window and parses the received SIB2.

[0104] Optionally, in the case where the access network device configures MBSFN subframes and the changed SIB2 includes MBSFN configuration information, the terminal can receive the changed SIB2 in any one or more of subframe No. 0, subframe No. 4, subframe No. 5, and subframe No. 9 in the fourth system frame in the first SI window.

[0105] In the case where the access network device does not configure MBSFN subframes and the changed SIB2 includes non - MBSFN configuration information, the terminal can receive the changed SIB2 in at least one of subframe No. 0, subframe No. 1, subframe No. 2, and subframe No. 3 in the fourth system frame in the first SI window; or, receive the changed SIB2 in at least one of subframe No. 0, subframe No. 2, subframe No. 5, and subframe No. 9 in the fourth system frame; or, receive the changed SIB2 in any one or more subframes of the fourth system frame.

[0106] Furthermore, the terminal can communicate with the access network device according to the specific information included in the parsed SIB2.

[0107] Based on Figure 4 the method shown, when the information in SIB2 changes in the access network device (such as a base station), the access network device obtains the SIB2 with changed information, and then sends the SIB2 in the fourth system frame of the first SI window, so that the terminal can have enough time to establish a channel for receiving the SIB2 with changed information, and can parse the SIB2 with changed information in time, solving the problem that the terminal causes long - term error codes and sudden drops in access service rates due to the inability to parse the SIB2 with changed information in the first SI window in time.

[0108] The following takes an access network device as a base station, where the base station sets MBSFN subframes, and the information in SIB2 is radio resource configuration information, and the radio resource configuration information includes MBSFN configuration information as an example, and is combined with Figure 9 to Figure 4 introduce the system message sending method shown.

[0109] Figure 9 It is a schematic flow chart of a system message sending method provided by an embodiment of the present application. As Figure 9 shown, the method includes:

[0110] S900: The base station sends SIB2 in the first SI window within the first SI period. Correspondingly, the terminal receives SIB2 from the base station in the first SI window within the first SI period.

[0111] Among them, SIB2 includes MBSFN configuration information, and may also include other existing information, which is not limited.

[0112] Optionally, the base station may use Figure 1 or Figure 2 the existing technology shown to send SIB2. In this application, if the information in SIB2 does not change, SIB2 is sent according to the existing technology.

[0113] S901: The base station reconfigures SIB2 for the terminal, where the value of the ra-ResponseWindowSize parameter included in the reconfigured SIB2 changes from sf10 to sf5, that is, when the information included in SIB2 changes, the reconfigured SIB2 is obtained.

[0114] Among them, the parameter value of ra-ResponseWindowSize is used to indicate the length of the random response reception window, and the value range is sf2, sf3, sf4, sf5, sf6, sf7, sf8, sf9, sf10, and the unit is subframes. If the terminal does not receive a random access response within the window length indicated by the parameter value of ra-ResponseWindowSize, the uplink synchronization fails.

[0115] Specifically, the parameter value of ra-ResponseWindowSize changes from sf10 to sf5, indicating that the length of the random response reception window is shortened from 10 subframes to 5 subframes.

[0116] It should be noted that the change of the ra-ResponseWindowSize parameter value in S901 is only for illustrative purposes. Optionally, when other radio resource configuration parameters and / or parameter values change, S901 may also be executed.

[0117] S902: The base station sends a system message change indication to the terminal. Correspondingly, the terminal receives the system message change indication.

[0118] Among them, the system message change indication is used to indicate to the terminal whether the information in the system message sent by the base station has changed when the next SI period arrives. If the system message change indication indicates that the information in the system message sent by the base station has changed, the terminal needs to re-parse the system message with the changed information when the next SI period arrives; if the system message change indication indicates that the information in the system message sent by the base station has not changed, the terminal still parses the system message according to the system message before the change when the next SI period arrives.

[0119] It should be understood that before the next SI period arrives, the terminal parses the system message according to the system message before the change. The next SI period refers to the first SI period that appears after the terminal receives the system message change indication. Figure 9 In the corresponding embodiment, it can be called the second SI period.

[0120] Specifically, the change of information in the system message can only occur in specific system frames, and these specific system frames are called SI periods (modification period, abbreviated as MP). The starting system frame number of the SI period should satisfy SFN mod m = 0, where m represents the SI period, which can be jointly determined by the modificationPeriodCoeff parameter and the defaultPagingCycle parameter in SIB2 in the system message before the change. Exemplarily, assuming that modificationPeriodCoeff = n2 and defaultPagingCycle = rf16 in SIB2 in the system message before the change, then the SI period m = 2 × 16 = 32, and the unit is the number of system frames. Therefore, the starting system frame number of the SI period can be the 0th system frame and the 32nd system frame, and one SI period is 32 system frames.

[0121] Specifically, the system message change indication may correspond to the systemInfoValueTag field in SIB1. When the next SI period arrives, the terminal can determine whether the information in the system messages other than MIB / SIB1 / SIB10 / SIB11 / SIB12 sent by the base station has changed through this field. Each time the information in the system messages (system messages other than MIB / SIB1 / SIB10 / SIB11 / SIB12) sent by the base station changes, the value of this field is incremented by 1. If the terminal determines through this value that when the next SI period arrives, the information in the system messages other than MIB / SIB1 / SIB10 / SIB11 / SIB12 sent by the base station has changed, then when the next SI period arrives, the terminal needs to re-parse the system messages whose information has changed.

[0122] Exemplarily, assume that the terminal determines from SIB2 in the system message before the change that the SI period is 32 system frames, and the starting system frame number of the SI period is the 0th system frame. The terminal parses the systemInfoValueTag field of SIB1 in the 16th system frame and determines that the value of this field has been incremented by 1. At this time, when the 32nd system frame arrives, the terminal will re-parse the system messages whose information has changed.

[0123] S903: When the second SI period arrives, the base station sends SIB2 in the 0th sub-frame, 4th sub-frame, 5th sub-frame, and 9th sub-frame of the 3rd frame in the first SI window of the second SI period.

[0124] At this time, SIB2 is the reconfigured SIB2 in S901, and the sub-frame position of SIB2 in the 3rd frame in the first SI window of the second SI period is as Figure 5 shown.

[0125] S904: When the second SI period arrives, the terminal receives the changed SIB2 in the 0th sub-frame, 4th sub-frame, 5th sub-frame, and 9th sub-frame of the 3rd frame in the first SI window of the second SI period and parses the received changed SIB2.

[0126] Specifically, when the second SI period arrives, after the terminal successfully parses MIB and SIB1 and after the channel transformation duration, it receives the changed SIB2 in the 0th sub-frame, 4th sub-frame, 5th sub-frame, and 9th sub-frame of the 3rd frame in the first SI window and parses the changed SIB2. Among them, the duration of the channel transformation corresponds to the duration required for the terminal to establish a channel for receiving the changed SIB2.

[0127] Furthermore, the terminal can communicate with the access network device according to the specific information included in the parsed SIB2.

[0128] Based on Figure 9 the method shown, when the base station configures MBSFN subframes and the information in SIB2 includes MBSFN configuration information, in accordance with the provisions of the radio communication protocol, the base station sends the changed SIB2 in one or more subframes of the fourth system frame in the first SI window, where one or more subframes of the fourth system frame do not include MBSFN subframes, so that this application is applicable to the standard radio communication protocol. Correspondingly, the terminal receives the changed SIB2 in one or more subframes of the fourth system frame in the first SI window, so that after successfully parsing SIB1, the terminal has enough time to establish a channel for receiving the changed SIB2, further achieving the purpose of timely parsing the changed SIB2.

[0129] The following takes the access network device as the base station, the base station does not set MBSFN subframes, the information in SIB2 is radio resource configuration information, and the radio resource configuration information includes non-MBSFN configuration information as an example, combined with Figure 10 to Figure 4 introduce the system message sending method shown.

[0130] Figure 10 is a schematic flowchart of a system message sending method provided by an embodiment of this application. As Figure 10 shown, the method includes:

[0131] S1000: The base station sends SIB2 in the first SI window within the first SI cycle. Correspondingly, the terminal receives SIB2 from the base station in the first SI window within the first SI cycle.

[0132] Among them, the SIB2 includes non-MBSFN configuration information and may also include other existing information, which is not limited.

[0133] S1001: The base station reconfigures SIB2 for the terminal. The value of the mac-ContentionResolutionTimer parameter included in the reconfigured SIB2 changes from sf32 to sf64, that is, when the information included in SIB2 changes, obtain the reconfigured SIB2.

[0134] Among them, the parameter value of mac-ContentionResolutionTimer is used to indicate the effective duration for the terminal to wait for receiving Msg4 during the random access process. The value range of the mac-ContentionResolutionTimer parameter is sf8, sf16, sf24, sf32, sf40, sf48, sf56, sf64, with the unit of subframe. If the terminal does not receive Msg4 within the duration indicated by the parameter value of mac-ContentionResolutionTimer and the timer expires, the random access fails and the terminal re-performs the random access process. Msg4 refers to the message for contention conflict resolution sent by the base station during the contention-based random access process.

[0135] Specifically, the parameter value of mac-ContentionResolutionTimer changes from sf32 to sf64, indicating that the effective duration for the terminal to wait for receiving Msg4 increases from the length of 32 subframes to the length of 64 subframes.

[0136] It should be noted that the change of the parameter value of mac-ContentionResolutionTimer in S1001 is only for exemplary illustration. Optionally, when other radio resource configuration parameters and / or parameter values change, S901 can also be executed.

[0137] S1002: The base station sends a system message change indication to the terminal. Correspondingly, the terminal receives the system message change indication.

[0138] Specifically, the execution process of step S1002 is the same as that of step S902. For the detailed description, see S902 and will not be elaborated here.

[0139] S1003: When the second SI period arrives, the base station sends SIB2 in subframe 0, subframe 1, subframe 2, and subframe 3 of frame No. 3 in the fourth system frame in the first SI window of the second SI period.

[0140] At this time, SIB2 is the reconfigured SIB2 in S1001. The subframe position of SIB2 in frame No. 3 in the first SI window of the second SI period is as Figure 7 shown.

[0141] S1004: When the second SI period arrives, the terminal receives the changed SIB2 in subframe 0, subframe 1, subframe 2, and subframe 3 of frame No. 3 in the first SI window of the second SI period, and parses the received changed SIB2.

[0142] Specifically, when the second SI period arrives, if the terminal successfully parses the MIB and SIB1, after the channel switching duration, it receives the changed SIB2 in subframe 0, subframe 1, subframe 2, and subframe 3 of the 3rd frame in the first SI window and parses the changed SIB2. Herein, the channel switching duration corresponds to the duration required for the terminal to establish a channel for receiving the changed SIB2.

[0143] Furthermore, the terminal can communicate with the access network device according to the specific information included in the parsed SIB2.

[0144] Based on Figure 10 the method shown above, when the base station does not configure MBSFN subframes and the information in SIB2 includes non-MBSFN configuration information, it sends the changed SIB2 in any one or more subframes of the fourth system frame in the first SI window, making this application applicable to the standard wireless communication protocol. Correspondingly, the terminal receives the changed SIB2 in any one or more subframes of the fourth system frame in the first SI window, so that after the terminal successfully parses SIB1, it has enough time to establish a channel for receiving the changed SIB2, further enabling timely parsing of the changed SIB2, and solving the problem that the terminal causes long-term error codes and sudden drops in access service rates due to the inability to timely parse the changed SIB2 in the first SI window.

[0145] The above mainly introduces the solution provided by the embodiments of this application from the perspective of the interaction between various devices. It can be understood that in order to implement the above functions, each device, such as an access network device (such as a base station), a terminal, etc., includes corresponding hardware structures and / or software modules for executing each function. Those skilled in the art should easily realize that, in combination with the algorithm steps of each example described in the embodiments disclosed herein, this application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the way of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0146] The embodiments of this application can group functional modules for access network devices, terminals, etc. according to the above method examples. For example, each functional module can be grouped corresponding to each function, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the grouping of modules in the embodiments of this application is illustrative, only a logical functional grouping, and there can be other grouping methods in actual implementation.

[0147] Figure 11 The structure diagram of a communication device 110 is shown. The communication device 110 can be used to perform the functions of the receiving end involved in the above embodiments. As an implementable manner, Figure 11 the shown communication device 110 includes: a processing unit 1101, a processing unit 1102;

[0148] The processing unit 1101 is used to obtain SIB2 when information change occurs in the system information block SIB2. For example, the processing unit 1102 can support the communication device 110 to execute S901 or S1001.

[0149] The transceiver unit 1102 is used to send SIB2, and this SIB2 is located in the fourth system frame of the first system information SI window. For example, the transceiver unit 1101 can be used to support the communication device 110 to execute S903 or S1003.

[0150] Among them, the related descriptions of the information change of SIB2, the first system information SI window, and the fourth system frame can be referred to those described in the above method embodiments.

[0151] Specifically, all the relevant contents of each step involved in the above Figure 9 or Figure 10 shown method embodiments can be cited to the function descriptions of the corresponding functional modules, and will not be elaborated here. The communication device 110 is used to execute Figure 9 or Figure 10 the functions of the base station in the shown system message sending method, so the same effect as the above system message sending method can be achieved.

[0152] As another implementable manner, Figure 11 the shown communication device 110 includes: a processing module and a communication module. The processing module is used to control and manage the actions of the communication device 110. For example, the processing module can integrate the functions of the processing unit 1101, can be used to support the communication device 110 to execute S901, or can be used to support the communication device 110 to execute S1001 and other processes of the technologies described herein. The communication module can integrate the functions of the transceiver unit 1102, can be used to support the communication device 110 to execute S903, or can be used to support the communication device 110 to execute S1003 and communicate with other network entities, such as with Figure 9 and Figure 10 the shown functional modules or network entities. The communication device 110 may further include a storage module for storing the program code and data of the communication device 110.

[0153] Figure 12The structural diagram of a communication device 120 is shown. The communication device 120 can be used to perform the functions of the terminal involved in the above embodiments. As an implementable manner, Figure 12 The shown communication device 120 includes: a transceiver unit 1201 and a processing unit 1202;

[0154] The transceiver unit 1201 is used to receive the SIB2 whose information has changed. The SIB2 is located in the fourth system frame of the first system information (SI) window. For example, the transceiver unit 1201 can be used to support the communication device 120 to execute S904 or S1004.

[0155] The processing unit 1202 is used to parse the SIB2 based on the SIB2. For example, the processing unit 1202 can support the communication device 120 to execute S904 or S1004.

[0156] Among them, the relevant descriptions of the SIB2 whose information has changed, the first system information (SI) window, and the fourth system frame can be referred to those described in the above method embodiments.

[0157] Specifically, all the relevant contents of each step involved in the above Figure 9 or Figure 10 shown method embodiments can be cited in the function descriptions of the corresponding functional modules, and will not be elaborated here. The communication device 120 is used to perform Figure 9 or Figure 10 the functions of the terminal in the shown system message sending method, so the same effects as the above system message sending method can be achieved.

[0158] As another implementable manner, Figure 12 The shown communication device 120 includes: a processing module and a communication module. The processing module is used to control and manage the actions of the communication device 120. For example, the processing module can integrate the functions of the processing unit 1202, can be used to support the communication device 120 to execute S904, or can be used to support the communication device 120 to execute S1004 and other processes of the technologies described herein. The communication module can integrate the functions of the transceiver unit 1201, can be used to support the communication device 120 to execute S904, or can be used to support the communication device 120 to execute S1004 and communicate with other network entities, such as with Figure 9 and Figure 10 the shown functional modules or network entities. The communication device 120 may further include a storage module for storing the program code and data of the communication device 120.

[0159] As mentioned above, the processing module may be a processor or a controller. It can implement or execute various exemplary logic blocks, modules, and circuits described in connection with the disclosure of this application. The processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on. The communication module may be a transceiver circuit or a communication interface, etc. The storage module may be a memory. When the processing module is a processor, the communication module is a communication interface, and the storage module is a memory, the communication devices 110 and 120 involved in the embodiments of this application may be Figure 13 the communication device 130 shown. For example, the above-mentioned access network device and terminal may adopt Figure 13 the composition structure shown or include Figure 13 the components shown. Figure 13 FIG. is a schematic diagram of the composition of a communication device 130 provided by an embodiment of this application. As Figure 13 shown, the communication device 130 may include a processor 1301, a communication line 1302, and a communication interface 1303.

[0160] Furthermore, the communication device 130 may further include a memory 1304. Among them, the processor 1301, the memory 1304, and the communication interface 1303 may be connected through the communication line 1302.

[0161] Among them, the processor 1301 may be a central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. The processor 1301 may also be other communication devices with processing functions, such as circuits, devices, or software modules, etc.

[0162] The communication line 1302 is used to transmit information between the various components included in the communication device 130.

[0163] A communication interface 1303 is used to communicate with other devices or other communication networks. The other communication network can be an Ethernet, a radio access network (RAN), a wireless local area network (WLAN), etc. The communication interface 1303 can be a radio frequency module, a transceiver, or any communication device capable of implementing communication. In the embodiments of the present application, the communication interface 1303 is taken as an example of a radio frequency module for illustration. Among them, the radio frequency module can include an antenna, a radio frequency circuit, etc., and the radio frequency circuit can include a radio frequency integrated chip, a power amplifier, etc.

[0164] A memory 1304 is used to store instructions. Among them, the instructions can be computer programs.

[0165] Among them, the memory 1304 can be a read-only memory (ROM) or other types of static storage devices that can store static information and / or instructions, or a random access memory (RAM) or other types of dynamic storage devices that can store information and / or instructions. It can also be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM), or other optical disc storage, optical disc storage, magnetic disk storage media, or other magnetic storage devices. Optical disc storage includes compressed optical discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.

[0166] It should be noted that the memory 1304 can exist independently of the processor 1301 or be integrated with the processor 1301. The memory 1304 can be used to store instructions, program codes, or some data, etc. The memory 1304 can be located inside the communication device 130 or outside the communication device 130, without limitation. The processor 1301 is used to execute the instructions stored in the memory 1304 to implement the communication method provided in the following embodiments of the present application.

[0167] In one example, the processor 1301 can include one or more CPUs, such as Figure 13 CPU0 and CPU1 in

[0168] As an optional implementation manner, the communication device 130 includes multiple processors. For example, in addition to Figure 13 the processor 1301 in

[0169] As an alternative implementation, the communication device 130 further includes an output device 1305 and an input device 1306. The input device 1306 is a keyboard, a mouse, a microphone, a joystick, etc., and the output device 1305 is a display screen, a speaker, etc.

[0170] It should be noted that the communication device 130 can be a desktop computer, a laptop computer, a network server, a mobile phone, a tablet computer, a wireless terminal, an embedded device, a chip system, or a device with a Figure 13 similar structure. In addition, Figure 13 the component structure shown in Figure 13 does not constitute a limitation on the communication device. Except for

[0171] the components shown, the communication device may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0172] In the embodiments of the present application, the chip system may be composed of chips, or may include chips and other discrete devices.

[0173] It should be understood that in the technical solution of the present application, the collection, storage, use, processing, transmission, provision, and disclosure of user personal information are all in compliance with relevant laws and do not violate public order and good customs. For example, in the technical solution of the present application, the processing of user personal information is carried out under the authorization of the user. This is explained here once, and will not be repeated below.

[0174] It should be noted that in the description, claims and drawings of this application, terms such as "first" and "second" are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices.

[0175] It should be understood that in this application, "at least one (item)" means one or more, "a plurality" means two or more, "at least two (items)" means two or three or more, and "and / or" is used to describe the association relationship of associated objects, indicating that three relationships can exist. For example, "A and / or B" can represent: only A exists, only B exists, and both A and B exist at the same time. Among them, A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects before and after. "At least one (one) of the following" or its similar expression means any combination of these items, including any combination of single item (one) or plural items (ones). For example, at least one (one) of a, b or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0176] It should be understood that in the embodiments of this application, "B corresponding to A" means that B is associated with A. For example, B can be determined according to A. It should also be understood that determining B according to A does not mean determining B only according to A, and B can also be determined according to A and / or other information. In addition, the "connection" that appears in the embodiments of this application refers to various connection methods such as direct connection or indirect connection to achieve communication between devices, and this application does not make any limitation on this.

[0177] Unless otherwise specified, the "transmission" (transmit / transmission) that appears in the embodiments of this application refers to two-way transmission, including the actions of sending and / or receiving. Specifically, the "transmission" in the embodiments of this application includes the sending of data, the receiving of data, or the sending and receiving of data. Or rather, the data transmission here includes uplink and / or downlink data transmission. Data can include channels and / or signals. Uplink data transmission is the transmission of uplink channels and / or uplink signals, and downlink data transmission is the transmission of downlink channels and / or downlink signals. The "network" and "system" that appear in the embodiments of this application express the same concept, and a communication system is a communication network.

[0178] Through the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and conciseness of description, only the grouping of the above functional modules is used as an example. In actual applications, the above functions can be allocated to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0179] In several embodiments provided in the present application, it should be understood that the disclosed communication devices and methods can be implemented in other ways. For example, the communication device embodiments described above are merely illustrative. For example, the grouping of the modules or units is only a logical function grouping. In actual implementation, there can be other grouping methods. For example, multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of the devices or units can be in electrical, mechanical or other forms.

[0180] The units described as separate components may or may not be physically separated. The components displayed as units may be one physical unit or multiple physical units, that is, they can be located in one place, or they can be distributed to multiple different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0181] In addition, in each embodiment of the present application, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above integrated units can be implemented in the form of hardware or in the form of software functional units.

[0182] If the above integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiments of the present application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. The software product is stored in a storage medium and includes several instructions for causing a device, such as a single-chip microcomputer, a chip, etc., or a processor to execute all or part of the steps of the methods described in the embodiments of the present application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, ROM, RAM, magnetic disks or optical discs that store program codes.

[0183] As described above, it is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method for sending system messages, characterized in that, it includes: When the information in the system message block SIB2 changes, obtain the SIB2; Send the SIB2, and the SIB2 is located in the fourth system frame of the first system information SI window.

2. A method for sending system messages, characterized in that, it includes: Receive the SIB2 whose information has changed, and the SIB2 is located in the fourth system frame of the first system information SI window; Based on the SIB2, parse the SIB2.

3. The method according to claim 1 or 2, characterized in that, The information in the SIB2 includes MBSFN configuration information, and the SIB2 is located in at least one of sub-frame No. 0, sub-frame No. 4, sub-frame No. 5, and sub-frame No. 9 in the fourth system frame.

4. The method according to claim 1 or 2, characterized in that, The information in the SIB2 includes non-MBSFN configuration information, and the SIB2 is located in at least one of sub-frame No. 0, sub-frame No. 1, sub-frame No. 2, and sub-frame No. 3 in the fourth system frame.

5. The method according to claim 1 or 2, characterized in that, The information in the SIB2 includes non-MBSFN configuration information, and the SIB2 is located in at least one of sub-frame No. 0, sub-frame No. 2, sub-frame No. 5, and sub-frame No. 9 in the fourth system frame.

6. The method according to claim 1 or 2, characterized in that, The information in the SIB2 includes non-MBSFN configuration information, and the SIB2 is located in any one or more sub-frames of the fourth system frame.

7. A communication device, characterized in that, The communication device is applied to an access network device, and the communication device includes: A processing unit, configured to obtain the SIB2 when the information in the system message block SIB2 changes; A transceiver unit, configured to send the SIB2, and the SIB2 is located in the fourth system frame of the first system information SI window.

8. A communication device, characterized in that, The communication device includes a processor and a communication interface, and the processor and the communication interface are used to support the communication device to execute the system message sending method according to claim 1 or any one of claims 3-6.

9. A communication device, characterized in that, The communication device is applied to a terminal, and the communication device includes: A transceiver unit, configured to receive the SIB2, and the SIB2 is located in the fourth system frame of the first system information SI window; A processing unit, configured to parse the SIB2 based on the SIB2.

10. A communication device, characterized in that, The communication device includes a processor and a communication interface, and the processor and the communication interface are used to support the communication device to execute the system message sending method according to claim 2 or claims 3-6.

11. A communication system, characterized in that, The communication system includes the communication device according to claim 7 or 8, or the communication system includes the communication device according to claim 9 or 10.

12. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed on a computer, cause the computer to perform the method according to claim 1 or any one of claims 3-6, or cause the computer to perform the method according to claim 2 or any one of claims 3-6.

13. A computer program product, wherein, the computer program product includes computer instructions that, when executed on a computer, cause the computer to perform the method according to claim 1 or any one of claims 3-6, or cause the computer to perform the method according to claim 2 or any one of claims 3-6.

Images