Method and apparatus for acquiring system information

Abstract

A method and apparatus for acquiring system information, which method and apparatus are beneficial to avoiding unnecessary acquisition requests and improving the success rate of requesting second system information, thereby improving the system performance. The method comprises: on the basis of first system information, determining a request mode for acquiring second system information, wherein the first system information includes request configuration information of the second system information, the first system information is system information acquired by a terminal before the second system information is acquired, or the first system information is system information stored in the terminal, the request mode may be a first request mode or a second request mode, the first request mode is a mode for requesting the second system information by means of a resource configured by a network device, and the second request mode is a mode for requesting the second system information by means of radio resource control signaling; and using the request mode to initiate an acquisition request for the second system information.

Description

Method and apparatus for acquiring system information

[0001] The present application claims priority from the Chinese patent application No. 202411041837.0 filed on July 30, 2024, and entitled "Method and apparatus for acquiring system information", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] Embodiments of the present application relate to the field of communication, in particular to a method and apparatus for acquiring system information. BACKGROUND

[0003] Currently, other system information (OSI) refers to other system information except for master information block (MIB) and first system information (for example, system information block 1 (SIB1)), which is referred to as second system information herein. The second system information can also be on demand-other system information (OD-OSI), that is, the terminal requests and acquires the second system information when the terminal needs the second system information.

[0004] The terminal needs to determine the request mode for acquiring the second system information according to the first system information, and the request mode for the terminal to acquire the second system information includes a first request mode and a second request mode. The first request mode is a message one (MSG1-based) request mode, that is, the terminal requests the second system information through the resource configured by the network device. The second request mode is a message three (MSG3-based) request mode, that is, the terminal requests the second system information through radio resource control (RRC) signaling.

[0005] In the network energy saving scenario, the network device does not continuously send the first system information, and the terminal cannot directly obtain the first system information when the terminal needs to acquire the second system information. In the above scenario, which request mode the terminal adopts to acquire the second system information, that is, how the terminal determines the request mode for acquiring the second system information, is a technical problem to be solved at present. SUMMARY

[0006] The application provides a method and device for acquiring system information. In a network energy saving scenario, i.e. a scenario in which a network device does not continuously send first system information, a terminal can determine a request mode for second system information. The scheme can avoid unnecessary acquisition requests, improve the request success rate of the second system information, and thus improve system performance.

[0007] To achieve the above object, embodiments of the application use the following technical solutions:

[0008] In a first aspect, a method for acquiring system information is provided. The method can be executed by a terminal or a chip or circuit in the terminal. The method includes: determining a request mode for acquiring second system information based on first system information, the first system information containing request configuration information of the second system information, the first system information being system information acquired by the terminal before acquiring the second system information or being system information stored by the terminal, the request mode including a first request mode and a second request mode, the first request mode being a mode for requesting the second system information through a resource configured by a network device, and the second request mode being a mode for requesting the second system information through radio resource control signaling; and initiating an acquisition request for the second system information using the request mode.

[0009] Based on the method for acquiring system information provided in the first aspect, the terminal determines the request mode for acquiring the second system information using the first system information. In a network energy saving scenario, although the network device does not continuously send the first system information, the terminal can actively request the first system information or can use system information stored by the terminal to determine the request mode for acquiring the second system information. In the case of meeting the green network energy saving, the terminal can still determine the request mode for requesting the second system information using the first system information. The method avoids unnecessary acquisition requests, improves the request success rate of the second system information, and thus avoids unnecessary energy consumption of the network device.

[0010] In combination with the first aspect, in some implementations of the first aspect, before initiating the acquisition request for the second system information, the method for acquiring system information further includes: initiating an acquisition request for the first system information, and acquiring the first system information.

[0011] Based on the requirement of network green energy saving, the first system information is in a state of non-continuous periodic sending, i.e. the scheme allows the network device to send the first system information after receiving the acquisition request of the terminal. On the one hand, by reducing the number of times of sending the first system information by the network device, the purpose of network energy saving is achieved. On the other hand, by acquiring the first system information in time, the terminal can understand the state of the second system information, which facilitates determining the request mode for acquiring the second system information and avoids unnecessary acquisition requests.

[0012] In some implementations of the first aspect, the method further includes: initiating the request for the first system information based on a preset condition, the preset condition including at least one of the following: the first system information being in a state of not being transmitted by the network device; the first system information being invalid first system information; the first system information being on-demand first system information OD-SIB1; the cell in which the terminal is located being a cell supporting transmission of the first system information on demand; the second system information being invalid second system information; the second system information being in a state of not being transmitted by the network device; the second system information being on-demand second system information OD-SIBx; the terminal failing to request the second system information; or the terminal receiving change indication information, the change indication information being used to indicate that a system information broadcast state and / or a system information request resource has changed.

[0013] To achieve the purpose of network energy saving and to determine the request mode for obtaining the second system information in a timely and accurate manner, the terminal can initiate the request for the first system information only when the preset condition is met. This limitation can avoid resource waste caused by redundant first system information requests.

[0014] In some implementations of the first aspect, the method further includes: storing the first system information as the first system information stored by the terminal based on a preset condition, the preset condition including at least one of the following: the first system information being in a state of not being transmitted by the network device; the first system information being invalid first system information; the first system information being on-demand first system information; the cell in which the terminal is located being a cell supporting transmission of the first system information on demand; the second system information being invalid second system information; the second system information being in a state of not being transmitted by the network device; the second system information being on-demand second system information OD-SIBx; the terminal failing to request the second system information; or the terminal receiving change indication information, the change indication information being used to indicate that a system information broadcast state and / or a system information request resource has changed.

[0015] In addition to determining the request mode for obtaining the second system information based on the reacquired first system information, the terminal can also determine the request mode for obtaining the second system information based on the stored first system information. This scheme has the advantage of making full use of the existing first system information in the terminal memory without reacquiring, thereby further reducing consumption of network device resources.

[0016] In some implementations of the first aspect, the method further includes: initiating the request for the first system information based on a preset condition, the preset condition including at least one of the following: the first system information being in a state of not being transmitted by the network device; the first system information being invalid first system information; the first system information being on-demand first system information OD-SIB1; the cell in which the terminal is located being a cell supporting transmission of the first system information on demand; the second system information being invalid second system information; the second system information being in a state of not being transmitted by the network device; the second system information being on-demand second system information OD-SIBx; the terminal failing to request the second system information; or the terminal receiving change indication information, the change indication information being used to indicate that a system information broadcast state and / or a system information request resource has changed.

[0017] The terminal can also initiate the acquisition request of the first system information at the same time of initiating the acquisition request of the second system information. The advantage of this scheme is that the two kinds of system information can be acquired at the same time. The terminal can not only receive the required second system information, but also acquire and store the updated first system information, and the information is synchronized with the network device, which is convenient for determining the request mode of the second system information next time.

[0018] With reference to the first aspect, in some implementations of the first aspect, if the acquisition request is a radio resource control system information request, the radio resource control system information request includes indication information for acquiring the first system information and the second system information; or the acquisition request is sent through a resource configured by the network device, and the resource is used to indicate that the first system information and the second system information are requested.

[0019] The two kinds of acquisition requests can be carried in the radio resource control system information or sent through the resource configured by the network device when the terminal initiates the first system information request and the second system information request. This scheme provides different choices for the terminal to acquire the first system information and the second system information.

[0020] With reference to the first aspect, in some implementations of the first aspect, the method for acquiring system information further includes initiating the acquisition request of the first system information.

[0021] In this scheme, the terminal determines the request mode of the second system information based on the first system information stored by itself, and sends the acquisition request of the second system information. The terminal can also initiate the acquisition request of another first system information to acquire the other first system information. This scheme provides a new choice for acquiring the second system information and the other first system information.

[0022] With reference to the first aspect, in some implementations of the first aspect, the change indication information can be sent in any of the following ways: a short message, a paging message, or the first system information.

[0023] The change indication information is used to indicate that the system information broadcast state and / or the system information request resource has changed. The message carrying the change indication information can be various, such as a short message, a paging message, or the first system information, or other system information in addition to the second system information. This scheme provides multiple choices for the carrier of the change indication information.

[0024] With reference to the first aspect, in some implementations of the first aspect, the change indication information can further include information for indicating the system information broadcast state and / or information for indicating the system information request resource.

[0025] When the system information broadcast state and / or the system information request resource changes, the change indication information can not only indicate the change, but also indicate the information of the system information broadcast state and / or the information of the system information request resource. The above scheme not only facilitates the terminal to obtain the latest parameters and realize information synchronization with the network device, but also can further reduce signaling overhead and avoid resource waste.

[0026] In combination with the first aspect, in some implementations of the first aspect, the change indication information is sent in a case where at least one of the following conditions is met: the first system information is on-demand first system information OD-SIB1; the cell in which the terminal is located is a cell supporting on-demand transmission of the first system information; or the second system information is on-demand second system information OD-SIBx.

[0027] In this scenario, the change indication information can make the terminal and the network device reach an agreement on the broadcast state of the system information, thereby ensuring information synchronization between the terminal and the network device without consuming network resources, and facilitating the terminal to accurately determine the request mode for obtaining the second system information.

[0028] In the second aspect, a method for obtaining system information is provided, which can be executed by a terminal or a chip or circuit in the terminal. The method comprises: determining a request mode for obtaining second system information, the request mode being a mode of requesting the second system information through radio resource control signaling; and initiating a request for obtaining the second system information by using the request mode.

[0029] Based on the method for obtaining system information provided in the second aspect, the terminal determines the request mode for obtaining the second system information as the mode of requesting the second system information through radio resource control signaling. The terminal can directly determine the request mode for obtaining the second system information without using the first system information. In a network energy saving scenario, the terminal can obtain the second system information through only one request, which can further reduce the number of system information requests and avoid energy consumption of the network device.

[0030] In some implementations of the second aspect, the request for the second system information is initiated in a case that a preset condition is met, and the preset condition includes at least one of the following: the first system information is in a state of not being transmitted by the network device; the first system information is invalid first system information; the first system information is on-demand first system information OD-SIB1; the cell in which the terminal is located is a cell supporting on-demand transmission of the first system information; the second system information is invalid second system information; the second system information is in a state of not being transmitted by the network device; the second system information is on-demand second system information OD-SIBx; the terminal fails to request the second system information; or the terminal receives change indication information, the change indication information being used to indicate that a system information broadcast state and / or a system information request resource has changed.

[0031] In order to achieve the purpose of network energy saving, the terminal can initiate the request for the second system information only in a case that the preset condition is met. The limitation condition can avoid resource waste caused by incorrect or unnecessary second system information acquisition requests.

[0032] In some implementations of the second aspect, the change indication information can be transmitted in any one of the following ways: a short message, a paging message, or the first system information.

[0033] In some implementations of the second aspect, the change indication information can further include information used to indicate a system information broadcast state and / or information used to indicate a system information request resource.

[0034] In some implementations of the second aspect, the change indication information is transmitted in a case that at least one of the following conditions is met: the first system information is on-demand first system information OD-SIB1; the cell in which the terminal is located is a cell supporting on-demand transmission of the first system information; or the second system information is on-demand second system information OD-SIBx.

[0035] In some implementations of the second aspect, the request for the second system information is initiated in a case that a preset condition is met, and the preset condition includes at least one of the following: the first system information is in a state of not being transmitted by the network device; the first system information is invalid first system information; the first system information is on-demand first system information OD-SIB1; the cell in which the terminal is located is a cell supporting on-demand transmission of the first system information; the second system information is invalid second system information; the second system information is in a state of not being transmitted by the network device; the second system information is on-demand second system information OD-SIBx; the terminal fails to request the second system information; or the terminal receives change indication information, the change indication information being used to indicate that a system information broadcast state and / or a system information request resource has changed.

[0036] In some implementations of the second aspect, the request for the second system information is initiated in a case that a preset condition is met, and the preset condition includes at least one of the following: the first system information is in a state of not being transmitted by the network device; the first system information is invalid first system information; the first system information is on-demand first system information OD-SIB1; the cell in which the terminal is located is a cell supporting on-demand transmission of the first system information; the second system information is invalid second system information; the second system information is in a state of not being transmitted by the network device; the second system information is on-demand second system information OD-SIBx; the terminal fails to request the second system information; or the terminal receives change indication information, the change indication information being used to indicate that a system information broadcast state and / or a system information request resource has changed.

[0037] With reference to the second aspect, in some implementations of the second aspect, the method of acquiring system information further includes initiating an acquisition request for acquiring the first system information.

[0038] In addition, some of the technical effects of the method of acquiring system information according to the second aspect can refer to some of the technical effects of the method of acquiring system information according to the first aspect, which will not be repeated here.

[0039] According to a third aspect, there is provided an apparatus for acquiring system information, configured to perform the method in any possible implementation of the first aspect or the second aspect. Specifically, the apparatus includes means / modules for performing the method in any possible implementation of the first aspect or the second aspect.

[0040] According to a fourth aspect, there is provided another apparatus for acquiring system information, including a processor coupled with a memory, and configured to execute instructions in the memory to implement the method in any possible implementation of the first aspect or the second aspect. Optionally, the apparatus for acquiring system information further includes the memory. Optionally, the apparatus for acquiring system information further includes a communication interface, and the processor is coupled with the communication interface.

[0041] In one implementation, the apparatus for acquiring system information is a terminal. When the apparatus for acquiring system information is a terminal, the communication interface can be a transceiver, or an input / output interface.

[0042] In another implementation, the apparatus for acquiring system information is a chip configured in a terminal. When the apparatus for acquiring system information is a chip configured in a terminal, the communication interface can be an input / output interface.

[0043] According to a fifth aspect, there is provided a processor including an input circuit, an output circuit and a processing circuit. The processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor performs the method in any possible implementation of the first aspect or the second aspect.

[0044] In a specific implementation process, the processor can be a chip, the input circuit can be an input pin, the output circuit can be an output pin, and the processing circuit can be a transistor, a gate circuit, a flip-flop, various logic circuits, etc. The input signal received by the input circuit can be received and input by, for example but not limited to, a receiver, the output signal output by the output circuit can be output to and transmitted by, for example but not limited to, a transmitter, and the input circuit and the output circuit can be the same circuit, which is used as the input circuit and the output circuit at different times. The present application does not limit the specific implementation of the processor and various circuits.

[0045] In a sixth aspect, a processing apparatus is provided, including a processor and a memory. The processor is configured to read instructions stored in the memory, and can receive signals through a receiver, and transmit signals through a transmitter, to perform the method in any possible implementation of the first aspect or the second aspect.

[0046] Optionally, the processor is one or more, and the memory is one or more.

[0047] Optionally, the memory can be integrated with the processor, or the memory and the processor are separately arranged.

[0048] In a specific implementation process, the memory can be a non-transitory memory, for example, a read only memory (ROM), which can be integrated on the same chip with the processor, or arranged on different chips respectively, and the embodiments of the present application do not limit the type of the memory and the arrangement mode of the memory and the processor.

[0049] It should be understood that the related data interaction process, for example, the process of transmitting the indication information, can be the process of outputting the indication information from the processor, and the process of receiving the capability information can be the process of receiving the input capability information by the processor. Specifically, the processed output data can be output to the transmitter, and the input data received by the processor can come from the receiver. The transmitter and the receiver can be collectively referred to as a transceiver.

[0050] The processing apparatus in the sixth aspect can be a chip, and the processor can be implemented by hardware or software. When implemented by hardware, the processor can be a logic circuit, an integrated circuit, etc. When implemented by software, the processor can be a general-purpose processor, which is implemented by reading software codes stored in the memory. The memory can be integrated in the processor, or exist independently outside the processor.

[0051] In a seventh aspect, a computer program product is provided, including a computer program (also referred to as code or instructions), which, when executed, causes a computer to perform the method in any possible implementation of the first aspect or the second aspect.

[0052] In an eighth aspect, a computer readable storage medium is provided, which stores a computer program (also referred to as code or instructions), which, when executed on a computer, causes the computer to perform the method in any possible implementation of the first aspect or the second aspect. BRIEF DESCRIPTION OF DRAWINGS

[0053] FIG. 1 is a structural schematic diagram of a communication system provided by an embodiment of the present application;

[0054] FIG. 2 is a flow diagram illustrating a request manner of acquiring system information by a network device configured resource;

[0055] FIG. 3 is a flow diagram illustrating a request manner of acquiring system information by radio resource control signaling;

[0056] FIG. 4 is a flow diagram illustrating a method for acquiring system information according to an embodiment of the present application;

[0057] FIG. 5 is a flow diagram illustrating another method for acquiring system information according to an embodiment of the present application;

[0058] FIG. 6 is a flow diagram illustrating another method for acquiring system information according to an embodiment of the present application;

[0059] FIG. 7 is a flow diagram illustrating another method for acquiring system information according to an embodiment of the present application;

[0060] FIG. 8 is a flow diagram illustrating another method for acquiring system information according to an embodiment of the present application;

[0061] FIG. 9 is a flow diagram illustrating another method for acquiring system information according to an embodiment of the present application;

[0062] FIG. 10 is a schematic block diagram of an apparatus for acquiring system information according to an embodiment of the present application;

[0063] FIG. 11 is a schematic block diagram of another apparatus for acquiring system information according to an embodiment of the present application. DETAILED DESCRIPTION

[0064] The technical solutions of the present application will be described below with reference to the accompanying drawings.

[0065] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as a narrowband Internet of Things (NB-IoT) system, a wireless fidelity (WiFi) system, a vehicle to everything (V2X) communication system, a device-to-device (D2D) communication system, a vehicle networking communication system, a 4th generation (4G) mobile communication system such as a long term evolution (LTE) system, a worldwide interoperability for microwave access (WiMAX) communication system, a 5th generation (5G) mobile communication system such as a new radio (NR) system, and future communication systems, etc.

[0066] The present application will present various aspects, embodiments, or features around systems that can include a plurality of devices, components, modules, etc. It should be understood and appreciated that various systems can include additional devices, components, modules, etc., and / or can not include all of the devices, components, modules, etc., discussed in connection with the figures. Additionally, a combination of these approaches can be used.

[0067] In addition, in the embodiments of the present application, the words "example" and "for example" are used to mean serving as an example, instance, or illustration. Any implementation described herein as "example" is not necessarily to be construed as preferred or advantageous over other implementations. Rather, use of the word example is intended to present concepts in a concrete manner.

[0068] The network architecture and service scenarios described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. It can be known by those skilled in the art that, with the evolution of network architecture and the appearance of new service scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0069] In order to facilitate understanding of the embodiments of the present application, first, the communication system suitable for the embodiments of the present application is described in detail taking the communication system shown in FIG. 1 as an example. Exemplarily, FIG. 1 is a schematic diagram of the architecture of a communication system suitable for the communication method provided by the embodiments of the present application.

[0070] As shown in FIG. 1, the communication system includes terminals and network devices. The terminals and the network devices can communicate through a wireless air interface.

[0071] In the embodiments of the present application, the network device can be any device with wireless transceiving function. The network device includes, but is not limited to, an evolved Node B (eNB), a radio network controller (RNC), a Node B (NB), a base station controller (BSC), a base transceiver station (BTS), a home base station (for example, a home evolved NodeB or a home Node B, HNB), a baseband unit (BBU), an access point (AP) in a wireless fidelity (WiFi) system, a wireless relay node, a wireless backhaul node, a transmission point (TP), or a transmission and reception point (TRP), and the like, and can also be a gNB or a TP in a 5G (for example, a NR) system, one or a group (including multiple antenna panels) of antenna panels of a base station in a 5G system, or a network node constituting a gNB or a transmission point, such as a baseband unit (BBU) or a distributed unit (DU).

[0072] In some deployments, a gNB can include a centralized unit (CU) and a DU. A gNB can also include an active antenna unit (AAU). The CU implements part of the functionality of the gNB and the DU implements part of the functionality of the gNB, for example, the CU can be responsible for processing non-real time protocols and services, e.g., it can implement functions of a radio resource control (RRC) layer, a service data adaptation protocol (SDAP) layer, and / or a packet data convergence protocol (PDCP) layer. The DU can be responsible for processing real time services, e.g., it can implement functions of a radio link control (RLC) layer, a media access control (MAC) layer, and a physical (PHY) layer. One DU can be connected to only one CU or connected to multiple CUs, and one CU can be connected to multiple DUs, the CU and the DU can communicate through an Fl interface. The AAU can implement part of the PHY layer processing functions, radio frequency processing, and related functions of the active antenna. Since the information of the RRC layer is ultimately delivered to the PHY layer and becomes the information of the PHY layer, or is converted from the information of the PHY layer, in this architecture, high layer signaling, such as RRC layer signaling, can also be considered as being transmitted by the DU, or by the DU+AAU.

[0073] It can be understood that the network device can be a device including one or more of the CU node, the DU node, and the AAU node. In addition, the CU can be divided into a network device in a radio access network (RAN) or a network device in a core network (CN), which is not limited in the present application.

[0074] The network device provides services for a cell, and a terminal communicates with the cell through transmission resources (for example, frequency domain resources, or spectrum resources) allocated by the network device. The cell can belong to a macro base station (for example, a macro eNB or a macro gNB, etc.), or a base station corresponding to a small cell. The small cell can include a metro cell, a micro cell, a pico cell, a femto cell, etc. These small cells have characteristics such as small coverage and low transmit power, and are suitable for providing high-speed data transmission services.

[0075] In the embodiments of the present application, the terminal can also be referred to as a user equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user device.

[0076] The terminal can be a device that provides voice / data connectivity to a user, such as a handheld device with wireless connectivity, a vehicle-mounted device, etc. Currently, some examples of terminals can be a mobile phone, a tablet, a computer with wireless transceiver function (such as a notebook, a palm computer, etc.), a mobile internet device (MID), a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical treatment, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal in a 5G network, or a terminal in a future evolved public land mobile network (PLMN), etc.

[0077] The wearable device can also be referred to as a smart wearable device, which is a general term for devices that are developed by applying wearable technology to daily wear and are smartly designed, such as glasses, gloves, watches, clothes, and shoes. The wearable device is a portable device that is directly worn on the body or integrated into clothes or accessories of a user. The wearable device is not only a hardware device, but also a device that achieves powerful functions through software support and data interaction and cloud interaction. The smart wearable device in a broad sense includes devices with full functions and large sizes, which can achieve complete or partial functions without relying on a smart phone, such as smart watches or smart glasses, and devices that focus on a certain application function and need to be used in cooperation with other devices, such as smart bands and smart jewelry for monitoring physical signs.

[0078] In addition, the terminal can also be a terminal in an internet of things (IoT) system. The IoT is an important part of future information technology development, and its main technical feature is to connect objects through communication technology and a network, so as to realize an intelligent network of human-machine interconnection and object-object interconnection. The IoT technology can achieve massive connection, deep coverage, and terminal power saving through, for example, narrow band (NB) technology.

[0079] In addition, the terminal can also include a smart printer, a train detector, a gas station sensor, and the like, and the main functions include collecting data (for some terminals), receiving control information and downlink data of a network device, and transmitting electromagnetic waves to transmit uplink data to the network device.

[0080] It should be noted that the communication method provided in the embodiments of the present application can be applied to communication between the terminal and the network device shown in FIG. 1, and specific implementation can be referred to the method embodiments described below, which will not be described here.

[0081] It should be noted that the scheme in the embodiments of the present application can also be applied to other communication systems, and the corresponding name can also be replaced by the name of the corresponding function in other communication systems.

[0082] It should be understood that FIG. 1 is only a simplified schematic diagram for ease of understanding, and other network devices and / or other terminals can also be included in the communication system, which are not shown in FIG. 1.

[0083] In the following, in order to facilitate understanding, first, the on-demand system information related technology will be introduced in combination with FIG. 2 and FIG. 3.

[0084] Other system information (OSI) refers to other system information in addition to master information block (MIB) and first system information (for example, system information block 1 (SIB1)), for example: SIB2, SIB3, and the like. For ease of description, it is collectively referred to as second system information (which can also be abbreviated as SIBx) herein. The second system information can also be on demand other system information (OD-OSI), that is, the terminal acquires the second system information in the case of needing to acquire any one or more system information blocks in the second system information, and the second system information is on demand second system information (OD-SIBx). Similarly, the first system information can also be on demand system information, that is, the terminal acquires the first system information in the case of needing to acquire the first system information, and the first system information is on demand first system information (OD-SIB1). It should be noted that the acquisition of the second system information in the present application can include acquiring all OSI, or acquiring any one or more system information blocks, which is not limited herein.

[0085] The request mode of the terminal for acquiring the second system information includes a first request mode and a second request mode. The first request mode is a MSG1-based request mode, and the second request mode is a MSG3-based request mode. In the current technology, the first system information is persistently broadcast by the network device, that is, it is sent at a fixed period and in a specified location, and the terminal can acquire SIB1 according to the period and the location. The terminal can determine to select which request mode to acquire the second system information according to the configuration in the first system information.

[0086] Specifically, the first request mode is a mode of acquiring system information through a system information request resource configured by the network device. Specifically, the terminal selects a suitable random access preamble according to the system information request resource configured by the network side, and requests the system information in a non-broadcast state.

[0087] FIG. 2 is a flowchart of a request mode of acquiring system information through a resource configured by a network device. The first request mode is described below in combination with FIG. 2.

[0088] FIG. 2 is a flow diagram of a first request mode, i.e., obtaining system information through network device configured resources. As shown in FIG. 2, the terminal can select corresponding random access resources and corresponding preambles (also referred to as preamble sequences) according to the configuration broadcast by the system, and initiate a random access procedure. The first request mode can specifically include the steps shown in FIG. 2:

[0089] S201, the network device sends a master information block, and the terminal receives the master information block.

[0090] The master information block (MIB) contains the most important basic information, and the terminal can only decode the first system information after receiving the master information block and successfully decoding the master information block.

[0091] S202, the network device sends the first system information, and the terminal receives the first system information.

[0092] The first system information can indicate the state of different system information blocks in the second system information, and can also indicate the request resources of the second system information. In addition, the first system information also contains indication of the second system information request configuration information. It is worth noting that it is because the terminal identifies that the request configuration information in the first system information contains a field indicating the request configuration resources dedicated to the second system information that the terminal selects to obtain the second system information through the network device configured resources.

[0093] S203, the terminal initiates a random access request for requesting the second system information, and the network device receives the random access request.

[0094] Specifically, after receiving the first system information, the terminal determines that the state of the second system information is a non-broadcast state according to the indication information of the first system information, and requests to obtain the second system information.

[0095] S204, the network device sends a random access response, and the terminal receives the random access response.

[0096] S205, the network device sends a system information message containing the second system information, and the terminal receives the system information message.

[0097] The above-mentioned second request mode is to obtain the system information required by the terminal through radio resource control (RRC) signaling. Specifically, the terminal first initiates a random access request, sends RRC signaling after receiving the random access response, and includes the second system information whose transmission state is a non-broadcast state in the message.

[0098] The second request mode is described below in combination with FIG. 3.

[0099] FIG. 3 is a flowchart of a request mode for acquiring system information through radio resource control signaling. The flowchart shown in FIG. 3 can include the following steps.

[0100] S301, the network device sends a master information block, and correspondingly, the terminal receives the master information block.

[0101] The master information block (MIB) contains the most important basic information, and the terminal can acquire first system information only after successfully receiving the master information block.

[0102] S302, the network device sends first system information, and correspondingly, the terminal receives the first system information.

[0103] The first system information can indicate the status of the second system information, and at this time, the first system information does not have a field indicating a request configuration resource dedicated to the second system information. The terminal selects to acquire the second system information through radio resource control signaling.

[0104] S303, the terminal sends a random access request, and correspondingly, the network device receives the random access request.

[0105] S304, the network device sends a random access response, and correspondingly, the terminal receives the random access response.

[0106] S305, the terminal sends message three for requesting the second system information through RRC signaling, and correspondingly, the network device receives the message three.

[0107] It is worth noting that the terminal determines that the status of the second system information is a non-broadcast state according to the content of the first system information, and the terminal can acquire the second system information. The message three contains radio resource control (RRC) signaling, and the RRC signaling contains a field indicating acquisition of the second system information.

[0108] S306, the network device sends message four, and correspondingly, the terminal receives the message four.

[0109] The message four includes a medium access control control element (MAC CE). Specifically, after receiving the message three, if the terminal acquires the second system information, the network device sends the message four.

[0110] S307, the network device sends system information containing the second system information, and correspondingly, the terminal receives the system information.

[0111] Currently, the above two terminal ways of obtaining the required second system information are mainly used to request other system information in addition to the master information block and the first system information. Based on the demand for green energy saving, a scheme of non-persistent transmission of the first system information is being studied in the network energy saving issue. Non-persistent transmission, that is, compared with persistent transmission, the network device does not transmit the first system information at every specified location. The scheme allows the network side to transmit the first system information after receiving the request of the terminal. In the above scheme, the way in which the network device transmits the first system information based on the terminal request can also be called on-demand first system information OD-SIB1. The cell that transmits the first system information based on the terminal request, that is, the cell that supports network energy saving, can be called a network energy saving (NES) cell. The OD-SIB1 scheme can achieve the purpose of network energy saving by reducing the number of transmissions of SIB1 on the network side.

[0112] Since the terminal needs to operate according to the indication of the first system information when requesting the second system information, and the non-persistent transmission of the first system information causes the terminal to be unable to directly obtain the first system information when the terminal needs to request the second system information. Therefore, how the terminal determines the way of obtaining the second system information (that is, whether to select the first request mode or the second request mode) is a technical problem that needs to be solved at present. This problem can cause unnecessary acquisition requests and reduce the success rate of the second system information request.

[0113] Therefore, the embodiments of the present application provide a method and device for obtaining system information, which can determine the request mode of the second system information, avoid unnecessary acquisition requests, improve the success rate of the second system information request, and thus improve the system performance.

[0114] The method for obtaining the second system information provided by the present application will be described in detail below with reference to FIGS. 4 to 9. It should be understood that the technical solutions of the present application can be applied to a wireless communication system, for example, the communication system shown in FIG. 1. The two communication devices in the wireless communication system can have a wireless communication connection relationship, one of the two communication devices can correspond to the terminal shown in FIG. 1, or can be a chip configured in the terminal; the other of the two communication devices can correspond to the network device shown in FIG. 1, or can be a chip configured in the network device.

[0115] In the following, without loss of generality, the interaction process between the terminal and the network device will be described in detail as an example to illustrate the method for obtaining system information provided by the embodiments of the present application.

[0116] FIG. 4 shows a method 400 for acquiring system information according to an embodiment of the present application. The method 400 can be applied to the communication system shown in FIG. 1, or other communication systems, which are not limited herein.

[0117] The method 400 includes the following steps.

[0118] At S401, the terminal determines a request mode for acquiring the second system information based on the first system information. The first system information contains request configuration information of the second system information, and the terminal determines the request mode for acquiring the second system information based on the request configuration information. The request mode includes a first request mode and a second request mode. The first request mode is a mode for requesting the second system information through a request resource configured by a network device or a preset request resource, and the second request mode is a mode for requesting the second system information through radio resource control signaling. Specifically, if the request configuration information in the first system information contains an si-RequestConfig field, the terminal selects the first request mode to acquire the second system information, otherwise the terminal selects the second request mode. In one possible scenario, the request configuration information contains the si-RequestConfig field, and in this scenario the terminal selects the first request mode to acquire the second system information. For example, the request configuration information can also contain an si-SchedulingInfo field, which can indicate the transmission state of the second system information and the resource required for transmitting the request for acquiring the second system information. In another possible scenario, the request configuration information does not contain the si-RequestConfig field, and in this scenario the terminal selects the second request mode to acquire the second system information. For example, the terminal can transmit an RRCSystemInfoRequest carrying the request for acquiring the second system information. It should be noted that in the first request mode, the second system information is requested through a request resource configured by a network device, which can be understood as a second system information request resource. In the second request mode, the second system information is requested through radio resource control signaling, and in this scenario the request for the second system information uses a network device configured resource, which is a common random access resource. In addition, the first system information used to determine the above request mode can be system information acquired by the terminal before acquiring the second system information, or the first system information can be the first system information stored by the terminal.

[0119] At S402, the terminal initiates a request for acquiring the second system information using the above request mode, and accordingly the network device receives the request for acquiring the second system information.

[0120] In the method, the terminal determines the request mode for obtaining the second system information based on the first system information. Although the first system information is in a non-continuous sending state, the terminal can actively request the first system information from the network device or use the first system information stored in the terminal to determine the request mode for obtaining the second system information. In the case of meeting the network green energy saving requirement, the request mode for obtaining the second system information is determined by using the first system information, unnecessary request is avoided, the success rate of the request for the second system information is improved, and the system performance is improved.

[0121] It should be noted that the second system information in the present application refers to system information other than the first system information. The second system information can include all system information other than the first system information, or one or more system information other than the first system information, and the embodiments of the present application do not limit this. In addition, "requesting the second system information" in the present application means requesting at least one system information block in the second system information.

[0122] In a possible implementation manner of the embodiment of the present application, the method for the terminal to obtain system information further includes that the terminal initiates a request for obtaining the first system information and obtains the first system information.

[0123] Based on the requirement of network green energy saving, the first system information is in a non-continuous sending state, that is, the scheme allows the network device to send the first system information after receiving the request for obtaining from the terminal. On the one hand, by reducing the number of times of sending the first system information by the network device, the purpose of network energy saving is achieved. On the other hand, by obtaining the first system information in time, the terminal can understand the state of the second system information, which is convenient for determining the request mode for obtaining the second system information, and unnecessary or incorrect request is avoided.

[0124] It should be noted that the request mode for the terminal to obtain the first system information can be a mode of requesting the first system information through a request resource configured by the network device, or a mode of requesting the first system information through radio resource control signaling, and the embodiments of the present application do not limit this.

[0125] Further, the terminal initiates the request for obtaining the first system information, including: in the case of meeting a preset condition, the terminal initiates the request for obtaining the first system information, and the preset condition includes at least one of the following:

[0126] 1. The first system information is in a state of not being sent by the network device. One possible way of judging that the first system information is in a state of not being sent by the network device is that the terminal does not acquire the first system information at a specified time-frequency domain position where the first system information is sent; or the terminal acquires the first system information but does not acquire the acquired first system information; or the terminal does not acquire the acquired first system information within a first preset time. The first preset time can be determined by the terminal, can be a time agreed by the terminal and the network device, or can be a time sent by the network device to the terminal, and the embodiments of the present application do not limit this.

[0127] 2. The first system information is invalid first system information. Specifically, the terminal does not have a valid version of the first system information. For example, the terminal clears the stored first system information or the terminal stores the first system information that has become invalid, and the terminal needs to reacquire the first system information.

[0128] 3. The first system information is on-demand first system information OD-SIB1. Specifically, the terminal acquires the first system information according to needs. That is, in order to meet the needs of network energy saving, the network device does not continuously send the first system information.

[0129] 4. The cell in which the terminal is located is a cell supporting on-demand sending of the first system information. Specifically, the network device sends the first system information only after receiving the acquisition request of the terminal for acquiring the first system information, and this cell is referred to as a cell supporting on-demand sending of the first system information. One possible way of judging that the cell in which the terminal is located is a cell supporting on-demand sending of the first system information is that the cell or a neighboring cell of the cell indicates that the cell is a cell supporting on-demand sending of the first system information. Optionally, the first system information sent by the cell can be the first system information of the cell or the first system information of another cell, for example, the first system information of a neighboring cell of the cell.

[0130] 5. The second system information is invalid second system information. Specifically, the terminal does not have a valid version of the second system information. For example, the terminal clears the stored second system information or the terminal stores the second system information that has become invalid. In order to accurately determine the request mode of acquiring the second system information, the terminal needs to reacquire the first system information.

[0131] 6、the second system information is in a state of not being transmitted by the network device. One possible way of judging that the second system information is in a state of not being transmitted by the network device is that the terminal does not acquire the second system information at a specified time-frequency domain position where the second system information is transmitted; the terminal acquires the second system information but does not acquire the acquired second system information; or the terminal does not acquire the acquired second system information within a second preset time. The second preset time can be determined by the terminal, can be a time agreed by the terminal and the network device, or can be a time transmitted by the network device to the terminal, and the embodiments of the present application do not limit the second preset time.

[0132] 7、the second system information is on-demand second system information OD-SIBx. The on-demand second system information OD-SIBx means that the terminal acquires the second system information according to a need, i.e., in order to meet the demand of network energy saving, the network device does not continuously transmit the second system information. Specifically, the terminal can judge, based on the first system information, that the state of the system information message in which the second system information is located is a non-broadcast state, for example, a field si-BroadcastStatus indicating the state of the system information message in which the second system information is located shows not Broadcating. The system information message can contain one or more OSI system information blocks, and the embodiments of the present application do not limit the system information message.

[0133] 8、the terminal fails to request the second system information. In one possible scenario, the terminal failing to request the second system information means that the random access fails, for example, the terminal transmits a random access request but does not receive a random access response transmitted by the network device. In another possible scenario, the terminal failing to request the second system information means that the random access succeeds and the terminal detects the random access response but does not acquire the requested second system information. Specifically, the way of judging that the requested second system information is not acquired is the same as the way of judging that the second system information is in a state of not being transmitted by the network device.

[0134] 9、the terminal receives change indication information. The change indication information is used to indicate that the system information broadcast state and / or the system information request resource change. If the system information broadcast state and / or the system information request resource change, the terminal receives the change indication information. For example, the state of the second system information changes from the broadcast state to the non-broadcast state, and after the terminal receives the indication, in order to determine the request mode of acquiring the second system information, the terminal initiates a request for acquiring the first system information.

[0135] In order to achieve the purpose of network energy saving and timely and accurately determine the request mode of acquiring the second system information, the terminal can initiate a request for acquiring the first system information only when the above-mentioned preset conditions are met.

[0136] The above restriction condition can avoid resource waste caused by redundant or incorrect first system information acquisition requests.

[0137] For ease of understanding, the embodiments of the present application are described in detail below in combination with FIGS. 5 to 7.

[0138] For example, another possible system information acquisition method provided by the embodiments of the present application is shown as method 500 in FIG. 5. The method 500 includes the following steps.

[0139] S501, the terminal determines that the second system information needs to be acquired.

[0140] In a possible scenario, the terminal does not have a valid version of the second system information, for example, the terminal clears the second system information or the second system information stored by the terminal has become invalid, and the terminal needs to acquire the latest second system information.

[0141] S502, the terminal sends a first system information acquisition request, and correspondingly, the network device receives the first system information acquisition request.

[0142] Since the second system information is in a non-continuous sending state, the terminal needs to first request the first system information from the network device in order to determine the request mode of the second system information, and the terminal determines the request mode of the second system information based on the first system information.

[0143] S503, the network device sends the first system information. Correspondingly, the terminal receives the first system information.

[0144] In a possible scenario, the terminal determines the request mode of the second system information to be a first request mode through the second system information request configuration information in the first system information, that is, a request mode of the second system information through the second system information request resource configured by the network device, in which mode, the resource configured by the network device contains a preamble used for requesting the second system information. In another possible scenario, the terminal determines the request mode of the second system information to be a second request mode through the absence of the second system information request configuration information in the first system information, that is, a request mode of the second system information through radio resource control signaling, in which mode, a second system information request field in the radio resource control signaling indicates that the terminal needs to acquire the second system information.

[0145] S504, the terminal sends a second system information acquisition request, and correspondingly, the network device receives the second system information acquisition request.

[0146] Based on the first system information, the terminal can determine the request mode of the second system information, and then send the second system information acquisition request based on the request mode.

[0147] S505, the terminal sends the second system information, and correspondingly, the network device receives the second system information.

[0148] In the above process, the terminal first requests the first system information, and then determines the manner of acquiring the second system information according to the acquired first system information and acquires the second system information. This method can ensure that the terminal correctly acquires the system information required by the terminal according to the state and resource configuration of the system information, reduces unnecessary system information acquisition requests of the terminal, and meets the energy saving requirement.

[0149] In another possible implementation of the embodiment of the application, the method for the terminal to acquire system information can further include: in the case where a preset condition is met, the terminal uses the stored first system information, and the preset condition includes at least one of the following: the first system information is in a state of not being sent by the network device; the first system information is invalid first system information; the first system information is on-demand first system information OD-SIB1; the cell in which the terminal is located is a cell supporting on-demand sending of the first system information; the second system information is invalid second system information OD-SIBx; the second system information is in a state of not being sent by the network device; the second system information is on-demand second system information OD-SIBx; the terminal fails to request the second system information; or the terminal receives change indication information, the change indication information being used to indicate that the system information broadcast state and / or the system information request resource has changed; or the first system information stored by the terminal is valid first system information.

[0150] In addition to determining the request manner of acquiring the second system information based on the reacquired first system information, the terminal can also determine the request manner of acquiring the second system information based on the first system information stored by the terminal itself, for example, the terminal can acquire the first system information from the memory. The advantage of this scheme is that the existing first system information of the terminal can be fully utilized, the second system information is directly acquired through one request, the consumption of network device resources is further reduced, and another selection for determining the request manner of acquiring the second system information is provided.

[0151] In addition, in some scenarios, after receiving the acquisition request of the second system information, the network device can send the second system information and another first system information, and the another first system information is the changed first system information. The terminal can update the stored first system information by using the acquired another first system information, so as to facilitate the determination of the request manner of acquiring the second system information next time.

[0152] For example, another possible system information acquisition method is shown in method 600 of FIG. 6. The method 600 includes the following steps:

[0153] S601, the terminal determines that the second system information needs to be acquired.

[0154] In a possible scenario, the terminal does not have a valid version of the second system information, for example, the terminal clears the second system information or the second system information stored by the terminal has become invalid, and the terminal needs to acquire the latest second system information.

[0155] S602, the terminal determines a request mode for acquiring the second system information based on the stored first system information.

[0156] Based on the first system information stored by the terminal, the terminal can determine the request mode for acquiring the second system information, and then send a second system information acquisition request based on the request mode.

[0157] S603, the terminal sends a second system information acquisition request, and correspondingly, the network device receives the second system information acquisition request.

[0158] The terminal determines the request mode for acquiring the second system information based on the stored first system information. In a possible scenario, the first system information stored by the terminal includes system information request configuration information, and the terminal determines that the mode for acquiring the second system information is a first request mode, that is, a mode for requesting the second system information through a resource configured by the network device, in which the resource configured by the network device can include a preamble used for requesting the second system information. In another possible scenario, the first system information stored by the terminal does not include system information request configuration information, and the terminal determines that the mode for acquiring the second system information is a second request mode, that is, a mode for requesting the second system information through radio resource control signaling, in which a system information request field in the radio resource control signaling indicates that the terminal needs to acquire the second system information.

[0159] S604, the network device sends the first system information, and correspondingly, the terminal receives the first system information.

[0160] S605, the terminal sends a second system information acquisition request, and correspondingly, the network device receives the second system information acquisition request.

[0161] S606, the network device sends the second system information, and correspondingly, the terminal receives the second system information.

[0162] In a possible implementation, the terminal does not need to perform S604 and S605, that is, the network device sends the second system information after receiving the second system information acquisition request of S603, so that the terminal can acquire the second system information.

[0163] In another possible implementation, the terminal performs S604 and does not perform S605. In this implementation, the terminal can perform S604 and S606 simultaneously, i.e., the network device simultaneously sends the second system information and the first system information after receiving the second system information acquisition request of S603, so that the terminal can simultaneously acquire the second system information and the first system information (for ease of distinction, referred to herein as another first system information). After the terminal receives the another first system information, the stored first system information can be updated, so as to facilitate the terminal to determine the request mode for acquiring the second system information next time.

[0164] In another possible implementation, the terminal performs S604 and S605, and the network device sends the first system information after receiving the second system information acquisition request of S603, so that the terminal can acquire the first system information. Based on the first system information, the terminal can determine the request mode for acquiring the second system information again. The terminal performs S605 and initiates the second system information acquisition request again. The network device sends the second system information after receiving the second system information acquisition request of S605, so that the terminal can acquire the second system information.

[0165] Further, if the acquisition request is a radio resource control system information request, for example, RRCSystemInfoRequest, the radio resource control system information request includes indication information for acquiring the second system information and the another first system information; or if the acquisition request is sent through a request resource configured by the network device, the request resource is used to indicate the acquisition of the second system information and the another first system information.

[0166] When the terminal initiates the first system information and the second system information acquisition request, the acquisition request can be included in the radio resource control system information request or sent through the request resource configured by the network device. This scheme provides different choices for the terminal to acquire the first system information and the second system information at one time.

[0167] For example, another possible system information acquisition method is shown in method 700 of FIG. 7. The method 700 includes the following steps:

[0168] S701, the terminal determines that the second system information needs to be acquired.

[0169] In a possible scenario, the terminal does not have a valid version of the second system information, for example, the terminal enters a cell without the second system information or the terminal clears the stored second system information or the stored second system information of the terminal is invalid, and the terminal needs to acquire the latest second system information.

[0170] S702, the terminal determines a request mode for acquiring the second system information based on the stored first system information.

[0171] Based on the first system information stored by the terminal, the terminal can determine the request mode for acquiring the second system information, and then send a second system information acquisition request based on the request mode.

[0172] S703, the terminal sends the first system information and the second system information acquisition request, and correspondingly, the network device receives the first system information and the second system information acquisition request.

[0173] The terminal determines the request mode for acquiring the second system information based on the stored first system information. In one possible scenario, the first system information stored by the terminal contains system information request configuration information, and the terminal determines that the request mode for acquiring the second system information is a mode of requesting the second system information through the resource configured by the network device, in which the resource configured by the network device contains a preamble for requesting the second system information. In another possible scenario, the first system information stored by the terminal does not contain system information request configuration information, and the terminal determines that the request mode for acquiring the second system information is a mode of requesting the second system information through radio resource control signaling, in which a system information request field in the radio resource control signaling indicates that the terminal needs to acquire the second system information. In addition to requesting the second system information, the terminal can also send a request for acquiring the first system information, for updating the first system information stored by the terminal. For example, the terminal requests the first system information through radio resource control signaling, and the SIB1-request in the RRCSystemInfoRequest corresponding to the request for the first system information is true.

[0174] S704, the network device sends the first system information and the second system information, and correspondingly, the terminal receives the first system information and the second system information.

[0175] In addition, the terminal can also initiate a request for acquiring the first system information and the second system information. In one possible implementation, the terminal includes a request for acquiring the first system information in the request information for initiating the request for acquiring the second system information. The advantage of this scheme is that the above two system information can be acquired at one time. The terminal can not only receive the required second system information, but also acquire and store another first system information, and synchronize the information with the network device, facilitating the determination of the request mode for acquiring the second system information next time.

[0176] In addition, the method for acquiring system information can also include initiating a request for acquiring another first system information.

[0177] The terminal determines a request mode for acquiring the second system information based on the first system information stored by the terminal, and sends a request for acquiring the second system information. The terminal can also initiate a request for acquiring another first system information. The scheme provides a new selection for acquiring the second system information and the other first system information.

[0178] It is worth noting that the change indication information can be sent in any of the following ways: a short message, a paging message, or first system information.

[0179] The change indication information is used to indicate that the system information broadcast state and / or the system information request resource has changed. The message carrying the change indication information can be various, such as a short message, a paging message, or first system information, or other system information in addition to the second system information. The scheme provides multiple choices for the carrier of the change indication information.

[0180] Optionally, the change indication information can also include information indicating the system information broadcast state and / or information indicating the system information request resource.

[0181] When the system information broadcast state and / or the system information request resource changes, the change indication information can not only indicate the change, but also indicate the system information broadcast state and / or the system information request resource. The above scheme not only facilitates the terminal to acquire the latest parameters and achieve information synchronization with the network device, but also further reduces signaling overhead and avoids resource waste.

[0182] For example, the network device sends the changed system information broadcast state and / or system information request resource in real time, and the terminal can determine the request mode for requesting the second system information according to the latest system information broadcast state and / or system information request resource, thereby reducing the energy consumption of the network.

[0183] In addition, the change indication information is sent when at least one of the following conditions is met: the first system information is on-demand first system information OD-SIB1; the cell where the terminal is located is a cell supporting on-demand sending of the first system information; or the second system information is on-demand second system information OD-SIBx.

[0184] In this scenario, the change indication information can make the terminal and the network device reach an agreement on the broadcast state of the system information, avoid consuming network resources, ensure information synchronization between the terminal and the network device, and facilitate the terminal to accurately determine the request mode for acquiring the second system information.

[0185] The embodiment of the present application further provides a method for acquiring system information, as shown in 800 of FIG. 8. The method can be applied to the communication system shown in FIG. 1, or other communication systems, and the embodiment of the present application does not limit this.

[0186] The method 800 includes the following steps:

[0187] S801, the terminal determines a request mode for acquiring the second system information.

[0188] In the method, the request mode is a mode for requesting the second system information through radio resource control signaling. It is worth noting that even if the first system information indicates a mode for requesting the second system information through resources configured by the network device, i.e., the first system information contains second system information request configuration information, the terminal still adopts the above mode.

[0189] S802, the terminal initiates a request for acquiring the second system information by using the above request mode.

[0190] In the scheme, the terminal can directly determine the request mode for acquiring the second system information without using the first system information. In the network energy saving scenario, the terminal can acquire the second system information through only one request, which can further reduce the number of system information requests, and thus avoid the energy consumption of the network device.

[0191] Correspondingly, the terminal initiates a request for acquiring the second system information by using the above request mode, including: the terminal initiates a request for acquiring the second system information when a preset condition is met, and the preset condition includes at least one of the following: the first system information is in a state of not being sent by the network device; the first system information is invalid first system information; the first system information is on-demand first system information OD-SIB1; the cell where the terminal is located is a cell supporting on-demand sending of the first system information; the second system information is invalid second system information; the second system information is in a state of not being sent by the network device; the second system information is on-demand second system information OD-SIBx; the terminal fails to request the second system information; and the terminal receives change indication information, the change indication information being used to indicate that the system information broadcast state and / or the system information request resource has changed.

[0192] In order to achieve the purpose of network energy saving, the terminal can initiate a request for acquiring the second system information only when the above preset condition is met. This limitation condition can avoid resource waste caused by incorrect or unnecessary second system acquisition requests.

[0193] For example, another possible system information acquisition method is shown in method 900 of FIG. 9. The method 900 includes the following steps:

[0194] S901, the terminal needs to acquire the second system information.

[0195] In a possible scenario, the terminal does not have a valid version of the second system information, for example, the terminal clears the second system information or the second system information stored by the terminal has become invalid, and the terminal needs to acquire the latest second system information. In another possible scenario, the second system information is in a non-broadcast state or the second system information is in a state of not being sent by the network device, and the terminal also needs to acquire the latest second system information.

[0196] S902, the terminal sends a second system information acquisition request through radio resource control (RRC) signaling, or the terminal sends a first system information acquisition request and a second system information acquisition request, and correspondingly, the network device receives the second system information acquisition request, or the network device receives the first system information acquisition request and the second system information acquisition request.

[0197] In the system information acquisition scenario, the terminal adopts the manner of requesting the second system information through the radio resource control signaling. When the terminal acquires the second system information through the radio resource control signaling, a system information request field in the radio resource control signaling indicates that the terminal needs to request the second system information or part of the system information blocks in the second system information; or the system information request field in the radio resource control signaling indicates that the terminal needs to request the first system information and the second system information. Exemplarily, when a first system information request field in the system information request field is true, the terminal acquires the first system information and the second system information, otherwise the terminal only acquires the first system information.

[0198] S903, the network device sends the second system information, or the network device sends the first system information and the second system information, and correspondingly, the terminal receives the second system information, or the terminal receives the first system information and the second system information.

[0199] The above scheme can reduce the number of system information requests by acquiring the second system information once, and can avoid energy consumption of the network. In addition, in some network energy saving scenarios, compared with the manner of requesting the second system information through the resource configured by the network device, the manner of requesting the second system information through the radio resource control signaling can avoid acquiring incorrect second system information.

[0200] The change indication information can be sent in any of the following manners: a short message, a paging message, or the first system information.

[0201] Further, the change indication information can further include information indicating a system information broadcast state and / or information indicating a system information request resource.

[0202] In addition, the change indication information is sent in a case where at least one of the following conditions is met: the first system information is on-demand first system information OD-SIB1; the cell in which the terminal is located is a cell supporting on-demand transmission of the first system information; or the second system information is on-demand second system information OD-SIBx.

[0203] Correspondingly, initiating the acquisition request of the second system information can further include: initiating an acquisition request for acquiring the first system information and the second system information.

[0204] Further, the acquisition request is a radio resource control system information request, and the radio resource control system information request includes indication information for acquiring the first system information and the second system information; or the acquisition request is sent through a resource configured by the network device, and the resource is used to indicate acquisition of the first system information and the second system information.

[0205] In addition, the method of acquiring system information further includes: initiating an acquisition request for acquiring the first system information.

[0206] In addition, the part of the technical effects of the second method of acquiring system information can refer to the part of the technical effects of the first method of acquiring system information, which will not be described here.

[0207] The above describes in detail the method of acquiring system information according to the embodiments of the present application in combination with FIGS. 1 to 9. The apparatus for acquiring system information according to the embodiments of the present application will be described in detail in combination with FIGS. 10 and 11.

[0208] FIG. 10 shows an apparatus 1000 for acquiring system information according to an embodiment of the present application. The apparatus 1000 includes a processing unit 1010 and a transceiver unit 1020.

[0209] In a possible implementation, the apparatus 1000 is configured to perform the steps / processs corresponding to the terminal in the above method 400.

[0210] The processing unit 1010 is configured to determine a request mode of the second system information based on first system information, the first system information containing request configuration information of the second system information, the first system information being first system information acquired by the terminal before the terminal acquires the second system information, or the first system information being first system information stored by the terminal, the request mode including a first request mode and a second request mode, the first request mode being a mode of requesting the second system information through system information request resources, and the second request mode being a mode of requesting the second system information through radio resource control signaling; and the transceiver 1020 is configured to initiate an acquisition request of the second system information in the request mode.

[0211] Optionally, the transceiver 1020 is further configured to initiate an acquisition request of the first system information and acquire the first system information.

[0212] Optionally, the transceiver 1020 is further configured to initiate an acquisition request of the first system information when a preset condition is met, the preset condition including at least one of the following: the first system information is in a state of not being transmitted by a network device; the first system information is invalid first system information; the first system information is on-demand first system information OD-SIB1; a cell in which the terminal is located is a cell supporting on-demand transmission of the first system information; the second system information is invalid second system information; the second system information is in a state of not being transmitted by a network device; the second system information is on-demand second system information OD-SIBx; the terminal fails to request the second system information; or the terminal receives change indication information, the change indication information being used to indicate that a system information broadcast state and / or system information request resources change.

[0213] Optionally, the first system information is first system information stored by the terminal when a preset condition is met, the preset condition including at least one of the following: the first system information is in a state of not being transmitted by a network device; the first system information is invalid first system information; the first system information is on-demand first system information OD-SIB1; a cell in which the terminal is located is a cell supporting on-demand transmission of the first system information; the second system information is invalid second system information; the second system information is in a state of not being transmitted by a network device; the second system information is on-demand second system information OD-SIBx; the terminal fails to request the second system information; or the terminal receives change indication information, the change indication information being used to indicate that a system information broadcast state and / or system information request resources change.

[0214] Optionally, the transceiver 1020 is configured to initiate the acquisition request of the first system information and the second system information.

[0215] Optionally, the acquisition request is a radio resource control system information request, and the radio resource control system information request comprises indication information for acquiring the first system information and the second system information; or the acquisition request is sent through a resource configured by the network device, and the resource is used for indicating acquisition of the first system information and the second system information.

[0216] Optionally, the transceiver 1020 is configured to initiate the acquisition request of the first system information.

[0217] Optionally, the change indication information is sent in any one of the following ways: a short message, a paging message, or the first system information.

[0218] Optionally, the change indication information comprises information for indicating the system information broadcast state and / or information for indicating the system information request resource.

[0219] Optionally, the change indication information is sent in at least one of the following conditions: the first system information is on-demand first system information OD-SIB1; the cell where the terminal is located is a cell supporting on-demand transmission of the first system information; or the second system information is on-demand second system information OD-SIBx.

[0220] In another possible implementation, the apparatus 1000 is configured to perform steps / processs corresponding to the terminal in the above method 800.

[0221] Optionally, the processing unit 1010 is configured to determine a request mode of the second system information, the request mode being a mode of requesting the second system information through radio resource control signaling; and the transceiver 1020 is configured to initiate the acquisition request of the second system information in the request mode.

[0222] Optionally, the transceiver 1020 is further configured to initiate the acquisition request of the second system information when a preset condition is met, the preset condition including at least one of the following: the first system information is in a state of not being transmitted by the network device; the first system information is invalid first system information; the first system information is on-demand first system information OD-SIB1; the cell where the terminal is located is a cell supporting on-demand transmission of the first system information; the second system information is invalid second system information; the second system information is in a state of not being transmitted by the network device; the second system information is on-demand second system information OD-SIBx; the terminal fails to request the second system information; and the terminal receives change indication information, the change indication information being used to indicate a change in system information broadcast state and / or system information request resource.

[0223] Optionally, the change indication information is transmitted in any one of the following ways: a short message, a paging message, or the first system information.

[0224] Optionally, the change indication information includes information used to indicate the system information broadcast state and / or information used to indicate the system information request resource.

[0225] Optionally, the change indication information is transmitted when at least one of the following conditions is met: the first system information is on-demand first system information OD-SIB1; the cell where the terminal is located is a cell supporting on-demand transmission of the first system information; or the second system information is on-demand second system information OD-SIBx.

[0226] Optionally, the transceiver 1020 is further configured to initiate the acquisition request of the first system information and the second system information.

[0227] Optionally, the acquisition request is a radio resource control system information request, the radio resource control system information request including indication information used to acquire the first system information and the second system information; or the acquisition request is transmitted through a resource configured by the network device, the resource being used to indicate acquisition of the first system information and the second system information.

[0228] Optionally, the transceiver 1020 is further configured to initiate the acquisition request of the first system information.

[0229] It should be appreciated that the apparatus 1000 herein is embodied in the form of functional units. The term "unit" herein can refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (for example, a shared processor, a dedicated processor, or a group processor, etc.) and a memory for executing one or more software or firmware programs, a combination of logic circuitry and / or other suitable components that support the described functions. In an optional example, those skilled in the art can understand that the apparatus 1000 can be embodied in the terminal in the above-mentioned embodiments, and the apparatus 1000 can be used to execute the respective processes and / or steps corresponding to the terminal in the above-mentioned method embodiments. To avoid repetition, details are not described here.

[0230] The apparatus 1000 of each of the above-mentioned schemes has a function of implementing the corresponding steps executed by the terminal in the above-mentioned methods. The function can be implemented by hardware or by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-mentioned functions. For example, the transceiver unit can be replaced by a receiver and a transmitter, and other units such as the processing unit can be replaced by a processor, which respectively execute the transceiving operations and related processing operations in each of the method embodiments.

[0231] In the embodiments of the present application, the apparatus 1000 in FIG. 10 can also be a chip or a chip system, for example, a system on chip (SoC). Correspondingly, the transceiver unit 1010 can be a transceiver circuit of the chip, which is not limited here.

[0232] FIG. 11 shows another apparatus 1100 for acquiring system information according to an embodiment of the present application. The apparatus 1100 includes a processor 1110, a transceiver 1120, and a memory 1130. The processor 1110, the transceiver 1120, and the memory 1130 communicate with each other through an internal connection path. The memory 1130 is used to store instructions, and the processor 1110 is used to execute the instructions stored in the memory 1130 to control the transceiver 1120 to transmit and / or receive signals.

[0233] It should be understood that the apparatus 1100 can be embodied as a terminal in the above-described embodiments, and can be used to perform the steps and / or procedures corresponding to the terminal in the above-described method embodiments. Optionally, the memory 1130 can include a read-only memory and a random access memory, and provide instructions and data for the processor. A part of the memory can also include a non-volatile random access memory. For example, the memory can also store device type information. The processor 1110 can be used to execute the instructions stored in the memory, and when the processor 1110 executes the instructions stored in the memory, the processor 1110 is used to perform the steps and / or procedures of the above-described method embodiments corresponding to the terminal. The transceiver 1120 can include a transmitter and a receiver, the transmitter can be used to implement the steps and / or procedures corresponding to the transmitter for performing the sending actions described above, and the receiver can be used to implement the steps and / or procedures corresponding to the receiver for performing the receiving actions described above.

[0234] It should be understood that in the embodiments of the present application, the processor of the apparatus described above can be a central processing unit (CPU), and the processor can also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0235] In the implementation process, the steps of the above-described method can be completed by the integrated logic circuit of hardware in the processor or the instructions in the form of software. The steps of the method disclosed in combination with the embodiments of the present application can be directly embodied as hardware processor execution completion, or executed by the combination of hardware and software units in the processor. The software unit can be located in a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an electrically erasable programmable memory, a register, and other mature storage media in the art. The storage medium is located in the memory, and the processor executes the instructions in the memory to complete the steps of the above-described method in combination with the hardware thereof. To avoid repetition, it will not be described in detail here.

[0236] The present application also provides a computer readable storage medium for storing a computer program for implementing the method corresponding to the terminal in the above-described embodiments.

[0237] The present application also provides a computer program product including a computer program (also referred to as code or instructions), which can execute the method corresponding to the terminal shown in the above-described embodiments when the computer program runs on a computer.

[0238] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0239] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0240] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are merely schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, and can also be electrical, mechanical or other form of connection.

[0241] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, can be located in one place, or can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiments of the present application.

[0242] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0243] The integrated unit, if implemented in the form of a software function unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or say the part of the prior art that contributes to the present application, or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0244] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method of acquiring system information, characterized by, The method comprises: determining a request mode for acquiring second system information based on first system information, the first system information containing request configuration information of the second system information, the first system information being first system information acquired by a terminal before acquiring the second system information, or the first system information being first system information stored by the terminal, the request mode comprising a first request mode and a second request mode, the first request mode being a mode of requesting the second system information through system information request resources, and the second request mode being a mode of requesting the second system information through radio resource control signaling; initiating an acquisition request for the second system information by using the request mode.

2. The method of claim 1, wherein, Before initiating the acquisition request for the second system information, the method further comprises: initiating an acquisition request for the first system information to acquire the first system information.

3. The method of claim 2, wherein, The initiating of the acquisition request for the first system information comprises: initiating the acquisition request for the first system information when a preset condition is met, the preset condition comprising at least one of the following: the first system information is in a state of not being sent by a network device; the first system information is invalid first system information; the first system information is on-demand first system information OD-SIB1; a cell in which the terminal is located is a cell supporting on-demand sending of the first system information; the second system information is invalid second system information; the second system information is in a state of not being sent by the network device; the second system information is on-demand second system information OD-SIBx; the terminal fails to request the second system information; or the terminal receives change indication information, the change indication information being used to indicate that a system information broadcast state and / or system information request resources have changed.

4. The method of claim 1, wherein, When a preset condition is met, the first system information stored by the terminal is the first system information, and the preset condition comprises at least one of the following: the first system information is in a state of not being sent by a network device; the first system information is invalid first system information; the first system information is on-demand first system information OD-SIB1; a cell in which the terminal is located is a cell supporting on-demand sending of the first system information; the second system information is invalid second system information; the second system information is in a state of not being sent by the network device; the second system information is on-demand second system information OD-SIBx; the terminal fails to request the second system information; or the terminal receives change indication information, the change indication information being used to indicate that a system information broadcast state and / or system information request resources have changed.

5. The method of claim 4, wherein, The initiating of the acquisition request for the second system information comprises: initiating an acquisition request for the first system information and the second system information, the acquisition request being used to acquire the second system information and reacquire first system information.

6. The method of claim 5, wherein, The acquisition request is a radio resource control system information request, and the radio resource control system information request comprises indication information used to acquire the first system information and the second system information; or The acquisition request is sent through a resource configured by the network device, and the resource is used to indicate acquisition of the first system information and the second system information.

7. The method of claim 4, wherein, The method further includes: initiating an acquisition request for the first system information.

8. The method according to any one of claims 3-7, characterized in that, The change indication information is sent in any of the following ways: a short message, a paging message, or the first system information.

9. The method according to any one of claims 3-8, characterized in that, The change indication information includes information indicating the system information broadcast state and / or information indicating the system information request resource.

10. The method according to any one of claims 3-9, characterized in that, The change indication information is sent in at least one of the following conditions: The first system information is on-demand first system information OD-SIB1. The cell in which the terminal is located supports on-demand transmission of the first system information; or The second system information is on-demand second system information OD-SIBx.

11. A method of acquiring system information, characterized by, includes: determining a request mode for the second system information, the request mode being a mode of requesting the second system information through radio resource control signaling; initiating an acquisition request for the second system information using the request mode.

12. The method of claim 11, wherein, The initiation of the acquisition request for the second system information using the request mode includes: initiating an acquisition request for the second system information in a case where a preset condition is met, the preset condition including at least one of the following: The first system information is in a state of not being transmitted by the network device. The first system information is invalid first system information. The first system information is on-demand first system information OD-SIB1. The cell in which the terminal is located supports on-demand transmission of the first system information. The second system information is invalid second system information. The second system information is in a state of not being transmitted by the network device. The second system information is on-demand second system information OD-SIBx. The terminal fails to request the second system information. The terminal receives change indication information indicating a change in the system information broadcast state and / or the system information request resource.

13. The method of claim 12, wherein, The change indication information is sent in any of the following ways: a short message, a paging message, or the first system information.

14. The method according to claim 12 or 13, characterized in that, The change indication information includes information indicating the system information broadcast state and / or information indicating the system information request resource.

15. The method according to any one of claims 12-14, characterized in that, The change indication information is sent in at least one of the following conditions: The first system information is on-demand first system information OD-SIB1. The cell in which the terminal is located supports on-demand transmission of the first system information; or The second system information is on-demand second system information OD-SIBx.

16. The method according to any one of claims 11-15, characterized in that, The initiation of the acquisition request for the second system information includes: initiating an acquisition request for the first system information and the second system information.

17. The method of claim 16, wherein, The acquisition request is a radio resource control system information request including indication information for acquiring the first system information and the second system information; or The acquisition request is sent through a resource configured by the network device, and the resource is used to indicate acquisition of the first system information and the second system information.

18. The method of any one of claims 11-15, wherein, The method further comprises: initiating an acquisition request for the first system information.

19. An apparatus for acquiring system information, the apparatus comprising: comprising: means for implementing the method of any of claims 1-18.

20. An apparatus for acquiring system information, the apparatus comprising: comprising: a processor coupled with a memory for storing a program or instructions that, when executed by the processor, cause the apparatus to perform the method of acquiring system information as claimed in any of claims 1-18.

21. A computer-readable storage medium, characterized in that, a computer program or instructions stored thereon that, when executed by a computer, cause the computer to perform the method of acquiring system information as claimed in any of claims 1-18.

22. A computer program product, characterised in that, a computer program product comprising computer program code that, when run on a computer, causes the computer to implement the method of acquiring system information as claimed in any of claims 1-18.

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