CN112352453A - Method and apparatus for transmitting system information - Google Patents

Abstract

The embodiment of the application provides a method and equipment for transmitting system information, which can accelerate the time for acquiring the information by terminal equipment. The method comprises the following steps: the method comprises the steps that network equipment receives a first message sent by terminal equipment, wherein the first message is used for requesting system information; and the network equipment sends the system information in a second window under the condition that a second message is not sent in a first window, wherein the second message is used for indicating whether the network equipment sends the system information, and the second window is positioned behind the first window.

Description

Method and apparatus for transmitting system information Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a method and equipment for transmitting system information.

Background

When the terminal device needs to use System Information (SI), it may request the network device to obtain the SI, and the network device may indicate whether the SI is transmitted through a response message. However, for some reasons, such as the network device does not sense the channel available for replying to the response message, the network device cannot reply to the terminal device with the response message, or the terminal device fails to receive the response message, the terminal device needs to request the network device for obtaining the SI again, which greatly delays the time for the terminal device to obtain the SI.

Disclosure of Invention

The embodiment of the application provides a method and equipment for transmitting system information, which can accelerate the time for acquiring the system information by terminal equipment.

In a first aspect, a method for transmitting system information is provided, including: the method comprises the steps that network equipment receives a first message sent by terminal equipment, wherein the first message is used for requesting system information; and the network equipment sends the system information in a second window under the condition that a second message is not sent in a first window, wherein the second message is used for indicating whether the network equipment sends the system information, and the second window is positioned behind the first window.

In a second aspect, a method for transmitting system information is provided, including: the method comprises the steps that terminal equipment sends a first message to network equipment, wherein the first message is used for requesting system information; the terminal device detects the system information in a second window, wherein the second window is located behind a first window, the first window is used for transmitting a second message, the first window does not transmit the second message, and the second message is used for indicating whether the network device sends the system information.

In a third aspect, a network device is provided, configured to perform the method in the first aspect or each implementation manner thereof.

In particular, the physical device comprises functional modules for performing the method of the first aspect or its implementations.

In a fourth aspect, a terminal device is provided, configured to perform the method in the second aspect or each implementation manner thereof.

In particular, the terminal device comprises functional modules for performing the methods of the second aspect or its implementations.

In a fifth aspect, a communication device is provided for performing the methods of the first to second aspects.

In particular, the communication device comprises functional modules for performing the methods in the first to second aspects described above.

In a sixth aspect, a communication device is provided that includes a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory to execute the method in the first aspect to the second aspect.

In a seventh aspect, a chip is provided for implementing the methods in the first to second aspects.

Specifically, the chip includes: a processor for calling and running the computer program from the memory so that the device on which the chip is installed performs the method as in the first to second aspects.

In an eighth aspect, there is provided a computer-readable storage medium storing a computer program for causing a computer to perform the method of the first to second aspects.

In a ninth aspect, there is provided a computer program product comprising computer program instructions for causing a computer to perform the method of the first to second aspects above.

A tenth aspect provides a computer program which, when run on a computer, causes the computer to perform the method of the first to second aspects described above.

Through the technical scheme, after receiving the message which is sent by the terminal equipment through the first message and requests the system information, the network equipment can send the system information in the second window after the first window is finished even if the second message cannot be replied in the first window to indicate whether the system information is sent. If the terminal device does not detect the second message in the first window, or the terminal device fails to receive the second message in the first window, the system information can be continuously detected in the second window. Therefore, time delay caused by that the terminal equipment requests the network equipment for the system information again because the terminal equipment does not receive the second message in the first window can be avoided, and the time for the terminal equipment to acquire the system information can be shortened by the technical scheme provided by the application.

Drawings

Fig. 1 is a schematic diagram of a communication system architecture provided in an embodiment of the present application.

Fig. 2 is a schematic diagram of a method for transmitting system information according to an embodiment of the present disclosure.

Fig. 3 is a schematic diagram of a random access procedure provided in an embodiment of the present application.

Fig. 4 is a schematic structural diagram of another method for transmitting system information according to an embodiment of the present application.

Fig. 5 is a schematic block diagram of a network device according to an embodiment of the present application.

Fig. 6 is a schematic block diagram of a terminal device according to an embodiment of the present application.

Fig. 7 is a schematic block diagram of a communication device according to an embodiment of the present application.

Fig. 8 is a schematic block diagram of a chip provided in an embodiment of the present application.

Fig. 9 is a schematic block diagram of a communication system according to an embodiment of the present application.

Detailed Description

Technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, an LTE Frequency Division Duplex (FDD) System, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication System, or a 5G System.

Illustratively, a communication system 100 applied in the embodiment of the present application is shown in fig. 1. The communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or referred to as a communication terminal, a terminal). Network device 110 may provide communication coverage for a particular geographic area and may communicate with terminal devices located within that coverage area. Optionally, the Network device 110 may be a Base Transceiver Station (BTS) in a GSM system or a CDMA system, a Base Station (NodeB, NB) in a WCDMA system, an evolved Node B (eNB or eNodeB) in an LTE system, or a wireless controller in a Cloud Radio Access Network (CRAN), or may be a Network device in a Mobile switching center, a relay Station, an Access point, a vehicle-mounted device, a wearable device, a hub, a switch, a bridge, a router, a Network-side device in a 5G Network, or a Network device in a Public Land Mobile Network (PLMN) for future evolution, or the like.

The communication system 100 further comprises at least one terminal device 120 located within the coverage area of the network device 110. As used herein, "terminal equipment" includes, but is not limited to, connections via wireline, such as Public Switched Telephone Network (PSTN), Digital Subscriber Line (DSL), Digital cable, direct cable connection; and/or another data connection/network; and/or via a Wireless interface, e.g., to a cellular Network, a Wireless Local Area Network (WLAN), a digital television Network such as a DVB-H Network, a satellite Network, an AM-FM broadcast transmitter; and/or means of another terminal device arranged to receive/transmit communication signals; and/or Internet of Things (IoT) devices. A terminal device arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal", or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; personal Communications Systems (PCS) terminals that may combine cellular radiotelephones with data processing, facsimile, and data Communications capabilities; PDAs that may include radiotelephones, pagers, internet/intranet access, Web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. Terminal Equipment may refer to an access terminal, User Equipment (UE), subscriber unit, subscriber station, mobile station, remote terminal, mobile device, User terminal, wireless communication device, User agent, or User Equipment. An access terminal may be a cellular telephone, a cordless telephone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device having Wireless communication capabilities, a computing device or other processing device connected to a Wireless modem, a vehicle mounted device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolved PLMN, etc.

Alternatively, the 5G system or the 5G network may also be referred to as a New Radio (NR) system or an NR network.

Fig. 1 exemplarily shows one network device and two terminal devices, and optionally, the communication system 100 may include a plurality of network devices and may include other numbers of terminal devices within the coverage of each network device, which is not limited in this embodiment of the present application.

Optionally, the communication system 100 may further include other network entities such as a network controller, a mobility management entity, and the like, which is not limited in this embodiment.

It should be understood that a device having a communication function in a network/system in the embodiments of the present application may be referred to as a communication device. Taking the communication system 100 shown in fig. 1 as an example, the communication device may include a network device 110 and a terminal device 120 having a communication function, and the network device 110 and the terminal device 120 may be the specific devices described above and are not described herein again; the communication device may also include other devices in the communication system 100, such as other network entities, for example, a network controller, a mobility management entity, and the like, which is not limited in this embodiment.

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

The system information may be divided into a Master Information Block (MIB) and various System Information Blocks (SIBs). The MIB may be sent on a dedicated channel at a fixed period, and includes necessary information for the terminal device to receive a system information block type 1 (SIB 1). After receiving the MIB, the terminal device may receive SIB1 at the corresponding transmission location according to the configuration information of SIB1 included in the MIB. The SIB1 contains the information necessary for the terminal device to receive other SIBs.

SIBs other than SIB1 may be configured to be transmitted in one or more SI messages (messages), each of which may be transmitted in one SI window, which may also be referred to as a transmission window for system information. The SI window occurs periodically, that is, system information may be transmitted periodically. The mapping relationship of other SIBs with SI message, and configuration information related to SI message transmission may be indicated in the SIB 1. After receiving the SIB1 sent by the network device, the terminal device may obtain information such as an SI message used for transmitting another SIB and a transmission window of the SI message according to the indication information in the SIB.

Currently, there are two transmission modes of other SIBs, one is that a network device may periodically transmit system information. The other is that when the terminal device needs to use a certain part of the SI message, the network device may send a request message of the SI to the network device, and after receiving the request message sent by the terminal device, the network device may broadcast the SI message for a period of time according to the requirement of the terminal device.

The difference between the two transmission schemes is that the SI message is always broadcast or transmitted only after a request from the terminal device, but regardless of the transmission scheme, the transmission position of the SI message is transmitted according to the mapping relationship between the SIBs configured in the SIB1 and the SI message and the transmission configuration information of the SI message.

In the mechanism for sending based on the request of SI by the terminal device, the terminal device may send a first message to the network device, where the first message may be used to request SI, and after receiving the first message, the network device may notify the terminal device whether to send the SI by using a second message. If the network device indicates in the second message that the SI is to be sent, the terminal device may detect the SI within a window of the SI. The terminal device may not detect the SI in the window of the SI if the network device indicates that the SI is not sent in the second message.

The first message may be a message in a random access procedure, and the terminal device may send a request for the SI to the network device through the random access procedure. For example, the terminal device may send a request for SI to the network device via message 1(message1, MSG1) or MSG3, and the network device may reply to the SI request via MSG2 or MSG 4. The network device may transmit within the transmit window of MSG2 or MSG4 when transmitting MSG2 or MSG 4.

However, for some reasons, the network device may not be able to send the second message (e.g., MSG2 or MSG4) to the terminal device within the send window of the second message, and the network device may not be able to send the system information within the send window of the system information because it did not successfully send the second message. The terminal device does not receive the second message, does not know whether the network device sends the SI, and considers that the request fails, so that the terminal device sends the request of the SI to the network device again to acquire the SI. In this case, the whole process of acquiring the system information by the terminal device needs to be restarted from the request for the system information, which greatly delays the time for acquiring the system information by the terminal device.

The network device may not successfully send the second message, which may be that the network device cannot send the second message to the terminal device on the licensed spectrum due to a protocol mechanism, or that the network device cannot successfully send the second message on the unlicensed spectrum due to failing to listen to an available channel.

For example, after the terminal device sends the request of SI to the network device through the first message, but due to the constraint of the protocol mechanism, the network device does not need to reply the second message to the terminal device. The terminal device is therefore unable to receive the second message and will consider the request to have failed. In this case, the terminal device needs to retransmit the request message for the system information to the network device.

For another example, for unlicensed spectrum, the terminal device and the network device need to detect the channel before transmitting the signal. When an available channel is detected, i.e., the channel is in an idle state, it indicates that the channel detection is successful, and the channel can be used for transmitting signals. When no available channel is detected, i.e. when the current channels are occupied, no signal transmission can be performed.

After the terminal device successfully sends the first message, for example, after the terminal device successfully sends the MSG1 to request a certain SI, but the network device cannot obtain an available channel due to continuous Listen Before Talk (LBT) failure, so that the network device cannot send the MSG2 on a Random Access Response (RAR) window. The terminal device considers that the request fails because it does not receive the MSG2 on the RAR window, and then sends the SI request to the network device again. Or, the terminal device has successfully sent the MSG3 message for requesting a certain SI, but because the network device LBT fails to send the MSG4 within the valid time of the contention resolution timer, that is, the network device has not sensed the available channel after the contention resolution timer expires, the terminal device does not receive the MSG4 sent by the network device within the valid time of the contention resolution timer, considers that the request fails, and then sends the request for the SI to the network device again.

The above request process of the terminal device for re-initiating the system information due to the network device being unable to reply the second message will delay the time for the terminal device to obtain the system information.

The embodiment of the application provides a method for transmitting system information, which can accelerate the time for terminal equipment to acquire the system information.

The first message and the second message in the embodiment of the present application may not be messages specifically used for requesting system information, and the first message and the second message may have their own functions, and the first message and the second message have functions not used for requesting system information. For example, in the case that the first message is MSG1, MSG1 may not carry the identifier of the system information, MSG1 may be used to request the system information in the case that MSG1 carries the identifier of the system information, and MSG1 may be used to request the random access in the case that MSG1 does not carry the identifier of the system information. For another example, in the case that the second message is MSG2, MSG2 may not carry indication information on whether system information is transmitted, and in the case that MSG2 does not carry indication information, MSG2 may be configured to respond to the random access request.

Fig. 2 shows a schematic flow chart of a method of transmitting system information according to an embodiment of the present application. The method of fig. 2 comprises steps 210-220.

S210, the terminal device sends a first message to the network device, wherein the first message is used for requesting system information.

Wherein the system information may refer to system information other than SIB 1. The terminal device may send a first message to the network device requesting to obtain one or more system information.

The sending of the first message by the terminal device to the network device may refer to the sending of the first message by the terminal device to the network device on the licensed spectrum, or may refer to the sending of the first message by the terminal device to the network device on the unlicensed spectrum.

The terminal device requests the system information through the first message, which may mean that the terminal device carries an identifier of the system information in the first message to request the system information, or the terminal device requests to obtain the system information in an implicit manner.

The identification of the system information may be a random access resource associated with the system information, including a particular time domain resource and/or frequency domain resource. The random access resource information associated with the system information may be obtained in SIB1 or may be obtained in Radio Resource Control (RRC) proprietary signaling.

The terminal device requests the system information in an implicit manner, which may mean that the terminal device requests the network device for the system information through other information.

The first message may refer to a message in a random access procedure, or may refer to a message in another procedure (e.g., a normal communication procedure after the random access is completed). S220, the network device sends the system information in a second window under the condition that the network device does not send a second message in the first window, where the second message is used to indicate whether the network device sends the system information, and the second window is located behind the first window.

Likewise, the terminal device may detect the system information at a second window, where the second window may be located after the first window, and the first window is used for transmitting a second message, and the second message is used for indicating whether the network device sends the system information.

Optionally, the terminal device may detect the system information in the second window, where the second message is not transmitted in the first window, or where the terminal device does not detect the second message in the first window, the terminal device may directly detect the system information in the second window.

The second message is not transmitted in the first window, which may mean that the network device does not send the second message in the first window, or that the network device sends the second message in the first window, but the terminal device does not successfully receive the second message.

In addition, in the scheme of the embodiment of the application, the terminal device detects the system information at the second window, which may also mean that the terminal device directly detects the system information at the second window after sending the first message, and does not need to detect the second message at the first window. Or, the terminal device may detect the second message in the first window after sending the first message, and then determine whether to detect the system information in the second window according to the content of the second message. The terminal device may detect the system information at the second window if the second message indicates that the network device transmits the system information, and may not detect the system information at the second window if the second message indicates that the network device does not transmit the system information.

The first window may be a window for sending the second message, and the first window may be a preconfigured window. For example, the first window may be a time interval specified in the protocol. For example, the first window may be several subframes after the network device receives the first message.

The second window may be a window preset in a protocol, or the second window is a window after the terminal device negotiates with the network device, so that it can be ensured that the terminal device can receive the system information at a correct position after the network device sends the system information at the second window. For example, the second window may be a window specified in a protocol that is dedicated to transmitting system information, the second window having a fixed transmission position, the position of which may be indicated in the SIB 1.

Alternatively, the first message and the second message may refer to messages in a random access procedure. The terminal device can acquire synchronization with the network device through a random access process. After synchronization with the network device, the terminal device can perform uplink transmission. In this embodiment, the terminal device may request to obtain the system information through a random access procedure, in other words, the first message and the second message may include messages in the random access procedure. The random access procedure is described below in conjunction with fig. 3.

Currently, the random access procedure generally employs a four-step contention-based random access procedure, which is described below with reference to fig. 3.

It should be noted that, in the embodiments of the present application, only contention-based random access is taken as an example for description, but the present application is not limited to this, and the embodiments of the present application may also be applied to non-contention-based random access. The terminal device may also request to obtain the SI based on a non-contention random access procedure.

And S310, the terminal equipment sends the MSG1 to the network equipment. A random access preamble may be included in the MSG 1.

S320, after receiving the MSG1, the network device may send the MSG2 on a downlink shared channel (DL-SCH). Among them, MSG2 is a Random Access Response (RAR).

The network device may inform the terminal device of the information of the uplink resources that can be used through MSG 2.

The network device sending the RAR may send on the RAR window. The RAR window may be within several subframes after the terminal device sends the random access preamble, for example, the RAR window may be within 2 to 10 subframes after the 3 rd subframe after the terminal device sends the random access preamble starts.

The RAR response carries uplink resource information that can be used and Timing Advance (TA) adjustment of uplink transmission and temporary cell radio network temporary identifier (T-CRNTI), that is, a temporary CRNTI.

Alternatively, the RAR response may be generated by a Media Access Control (MAC) layer of the network device. One MSG2 may correspond to multiple terminal device random access request responses simultaneously.

S330, after receiving MSG2, the terminal device determines whether it belongs to its RAR message, and if it is determined that it belongs to its RAR message, it transmits message 3(message3, MSG3) in the uplink resource designated by MSG2, where MSG3 carries the RNTI specific to the terminal device. MSG3 may also be understood to be used for the first upstream transmission.

MSG3 may contain different content for different scenes. If the terminal equipment is in the initial access process, the MSG3 may carry an RRC connection request generated by the RRC layer, and the RRC connection request may include a temporary identity or a random number of the terminal equipment. If in the connection reestablishment process, the MSG3 may carry an RRC connection reestablishment request generated by the RRC layer. If it is during the handover, the MSG3 may transmit the RRC handover complete message generated by the RRC layer and the C-RNTI of the terminal device.

In S340, after receiving the MSG3, the network device may send an MSG4 message to the terminal device. The MSG4 includes contention resolution information and uplink transmission resources allocated by the network device to the terminal device.

The contention resolution message may be sent within an effective time of the contention resolution timer, where the effective time of the contention resolution timer may be started after the terminal device performs the first uplink scheduling transmission, and the time length of the timer may be ended after the expiration of the time length. The duration of the timer may be a duration specified in a protocol, or a duration configured by the network device to the terminal device, or a duration negotiated between the terminal device and the network device.

After receiving the MSG4, the terminal device may detect whether the specific identifier sent in MSG3 is included in the contention resolution message sent by the network device. If yes, the random access process of the terminal equipment is indicated to be successful, otherwise, the random access process is considered to be failed. After the random access procedure fails, the terminal device needs to initiate the random access procedure from the first step again.

The terminal device requests the SI through a random access procedure, which may mean that the terminal device requests the SI through MSG1 or MSG3, or the terminal device may request the SI through other messages in the random access procedure.

In the embodiment of the application, the terminal device may request the SI through the first message. Wherein the first message may include MSG1, or the first message may include a message for transmitting a random access preamble. Optionally, the terminal device sends the first message to the network device, which may refer to the terminal device sending a random access preamble to the network device, where the random access preamble is at least used for requesting the system information.

Optionally, the first message includes MSG1, which may be used for normal random access request in addition to requesting to obtain system information.

The first message may include MSG3 or the first message may include a message for a first uplink scheduled transmission during a random access procedure. Optionally, the sending, by the terminal device, the first message to the network device may refer to sending, by the terminal device, a message used for performing the first uplink scheduling transmission in the random access process to the network device, where the message may include an identifier of the requested system information.

Optionally, the first message includes MSG3, and the first message may be used for normal first uplink scheduling transmission in addition to requesting to obtain system information.

The terminal device requests the SI through the random access procedure, but the embodiment of the present application is not limited to this, and the SI may also be requested through other procedures, for example, after the terminal device successfully accesses the network, the SI is requested through uplink transmission in the process of normal uplink transmission with the network device.

The network device not replying with the second message within the first window may mean that the network device does not listen to an available channel before the end of the first window on the unlicensed spectrum. For the unlicensed spectrum, before responding to the first message for requesting the system information, the network device needs to listen to the channel first, and if the network device cannot listen to the available channel within the first window, the network device does not feed back the second message.

The network device may continue to listen to the available channel after the first window ends, and transmit the system information in the second window after listening to the available channel.

The first window may be a time interval specified in the protocol. For example, it may be the network device within several subframes after receiving the first message. The second window may refer to a transmission window of SI messages, which may occur periodically, and may be indicated in SIB1, and the network device may transmit the system information in each transmission window of SI messages.

The network device listens to the available channel after the first window ends, which may mean that the network device listens to the channel all the time after the first window ends, or may mean that the network device listens to the channel only at the position of the second window.

As an example, the network device may listen to the channel immediately after the end of the first window, send some occupancy signals after listening to the available channel, and send the system information in the second window after waiting for the sending location of the second window.

As another example, the network device may listen to the channel again at the position of the second window after the first window is over, and send the system information at the position of the second window after the available channel is listened to.

Optionally, the first message may include a random access preamble, the second message includes a random access response message, and the first window may include a RAR window. Or, the first message includes a message for performing a first uplink scheduling transmission in a random access procedure, the second message includes a contention resolution message in the random access procedure, and the first window includes an effective time of a contention resolution timer.

When the terminal device sends a system information request to the network device through the random access preamble, the network device needs to reply a random access response message in the RAR window, and the network device can indicate whether to send the system information through the random access response message. The RAR window may be within several subframes after the terminal device sends the random access preamble, for example, the RAR window may be within 2 to 10 subframes after the 3 rd subframe after the terminal device sends the random access preamble starts.

When the terminal device sends a request for system information to the network device in a first uplink scheduling transmission manner, the network device needs to reply a contention resolution message before a contention resolution timer expires, and the network device can indicate whether to send the system information through the contention resolution message. The contention resolution timer may be started after the terminal device performs the first uplink scheduling transmission, and the duration of the timer may be a duration specified in a protocol.

The network device does not reply to the second message in the first window may mean that the network device does not reply to the random access response message in the RAR window, or the network device does not reply to the contention resolution message in the effective time of the contention resolution timer.

The terminal device does not receive the second message in the first window, which may mean that the terminal device does not detect the random access response message in the RAR window, or the terminal device does not detect the contention resolution message in the effective time of the contention resolution timer.

The network device may transmit the system information, where the network device transmits an SI message corresponding to the system information, and a correspondence between the system information and the SI message is indicated by the SIB 1.

In a conventional scheme, a terminal device may send a first message to a network device over an unlicensed spectrum to request certain system information. The network device may send a second message to the terminal device to indicate whether to send system information. And if the second message indicates that the network equipment does not send the system information, the terminal equipment does not detect the system information in the second window.

However, for unlicensed spectrum, if the network device does not detect an available channel before the end of the first window, the network device cannot successfully transmit the second message, and cannot indicate to the terminal device whether to transmit system information. Thus, even though the network device is ready to send the system information in the second window, the system information cannot be sent in the second window due to failure to reply to the second message in the first window. The terminal device considers that the request fails because the second message is not received, and retransmits the request of the system information to the network device. Thus, the process of requesting system information by the terminal device will start to restart, which may greatly delay the time for obtaining system information by the terminal device.

According to the technical scheme provided by the embodiment of the application, even if the network equipment does not detect the available channel before the first window is finished, the second message cannot be successfully sent to indicate whether the system information is sent or not. The network device may also continue to listen to the channel after the first window ends, and send the system information in the second window after listening to the available channel. If the terminal device does not detect the second message in the first window, it may continue to detect the system information in the second window after the first window is ended. If the system information is detected, the system information is received. The terminal device does not need to send the request of the system information to the network device again because the second information is not obtained in the first window, and the scheme of the embodiment of the application can accelerate the time for the terminal device to obtain the system information.

In addition, there is a case where the network device successfully transmits the second message. However, the terminal device does not detect the second message in the first window, or the terminal device fails to receive the second message in the first window, and the terminal device may continue to detect the system information in the second window within the preset time, instead of immediately resending the request for the system information to the network device. In this case, the network device may send the system information on the preconfigured second window, which may speed up the time for the terminal device to acquire the system information.

Alternatively, the second window may be located within a preset time interval after the first window ends. As shown in fig. 4, the window shown by the grid line is the first window, and the window shown by the vertical line is the second window. In the scheme shown in fig. 4, 3 second windows may be included in the preset time interval.

The network device does not listen to the available channel before the end of the first window, which may mean that the network device does not listen to the available channel before the end of the first window shown in fig. 4, and the network device may continue to listen to the channel within a preset time interval after the end of the first window. Therefore, the setting of the preset time interval can avoid resource waste caused by that the network equipment monitors the available channel to send the system information all the time after the first window is finished. If the network device does not listen to the available channel within the preset time interval, the network device can choose not to continue to listen to the available channel to send the system information.

Accordingly, the terminal device does not detect the second message before the end of the first window, which may mean that the terminal device does not detect the second message in the first window shown in fig. 4, and the terminal device may continue to detect the system information in the second window within the preset time interval after the end of the first window. Therefore, the setting of the preset time interval can avoid that the terminal equipment always detects the system information at the position of the second window, thereby causing the waste of resources. The terminal device may select a request to resend the system information to the network device if the system information is not detected within a preset time interval.

The preset time interval may include at least one second window, that is, the preset time interval may be greater than a transmission period of the system information. Therefore, the network equipment can be ensured to have a corresponding second window to send the system information under the condition that the network equipment detects the available channel after the first window is finished.

As shown in fig. 4, the preset time interval includes 3 second windows. If the network device listens to the available channel before the second window a, the system information can be sent at the positions of all the 3 second windows or at the positions of partial windows in the 3 second windows; if the network device detects an available channel between the second window a and the second window b, the network device may transmit system information at both the positions of the second window b and the second window c, or at some of the positions of the 2 second windows; the network device may send the system information at the location of the second window c if the network device detects an available channel at the location between the second window b and the second window c.

The preset time interval may be a time interval specified in a protocol, or may also be a time interval configured to the terminal device by the network device.

For example, the network device may send configuration information to the terminal device, which may be used to indicate a preset time interval. After receiving the configuration information, the terminal device may detect the system information at the position of the second window within the time interval indicated by the configuration information.

The configuration information may be carried through SIB1 or may also be carried through RRC signaling. The network device may indicate the preset time interval by sending SIB1 and/or RRC signaling to the terminal device.

Optionally, the configuration information may be sent to the terminal device by the network device after the terminal device requests the network device, or the configuration information may be sent to the terminal device by the network device periodically.

In addition, the network device may also indicate whether to transmit the system information to the terminal device by transmitting the SIB1 within a preset time interval. The network device may send SIB1 to the terminal device, which SIB1 may be used to indicate whether the network device sends the system information.

The embodiment of the present application does not specifically limit the manner in which the SIB1 indicates whether to send the system information. For example, the network device may carry indication information to indicate in SIB1 in case of transmitting system information, and not carry indication information to indicate in SIB1 in case of not transmitting system information. For another example, the network device may not carry indication information to indicate in SIB1 when system information is transmitted, and may carry indication information to indicate in SIB1 when system information is not transmitted. For another example, whether the network device sends system information or not, the network device carries indication information in the SIB1 for indication.

If the terminal device does not detect the second message in the first window, the SIB1 sent by the network device may be detected in a preset time interval, where transmission configuration information of the SIB1 may be indicated in the MIB. Upon receipt of SIB1, the terminal device may determine whether the network device transmitted the requested system information based on the content in SIB 1. If the network device has sent the system information, the terminal device may detect the system information at the second window; if the network device does not transmit the system information, the terminal device may not detect the system information in the second window. Of course, the terminal device may also detect the system information in the second window regardless of whether the network device successfully transmits the system information.

After the terminal device does not detect the second message in the first window, it may continue to detect whether the network device sends the requested system information in the second window. The terminal device may continue to reapply the request process for the system information during the process of detecting the system information in the second window. During this period, if the terminal device detects the system information sent by the network device, the terminal device may stop the process of requesting the system information again, and directly receive the system information sent by the network device. During this period, if the terminal device does not receive the system information transmitted by the network device, the terminal device may retransmit the request for the system information to the network device. Thus, the time for the terminal device to obtain the system information can be further accelerated.

The request for retransmitting the system information may use the same message as the initial request or may use a different message from the initial request. For example, the terminal device may transmit an initial request for system information to the network device through the MSG1, may transmit the MSG1 to the network device again to request the system information if the system information transmitted by the network device is not received within a preset time interval, or may transmit the MSG3 to request the system information again to the network device.

The method for transmitting system information according to the embodiment of the present application is described in detail above with reference to fig. 1 to 4, and the apparatus according to the embodiment of the present application is described below with reference to fig. 5 to 9, and the technical features described in the method embodiment are applicable to the following apparatus embodiments.

Fig. 5 is a schematic block diagram of a network device according to an embodiment of the present application. As shown in fig. 5, the network device 500 includes a communication unit 510.

A communication unit 510, configured to receive a first message sent by a terminal device, where the first message is used to request system information.

A communication unit 510, further configured to send the system information in a second window if the second message is not sent in the first window, where the second message is used to indicate whether the network device sends the system information, and the second window is located after the first window.

Optionally, the first message includes a random access preamble, the second message includes a random access response message, and the second window includes a random access response, RAR, window.

Optionally, the first message includes a message for performing a first uplink scheduling transmission in a random access procedure, the second message includes a contention resolution message in the random access procedure, and the first window includes an effective time of a contention resolution timer.

Optionally, the second window is located within a preset time interval after the first window is ended.

Optionally, the preset time interval includes at least 1 second window.

Optionally, the communication unit 510 is further configured to: and sending configuration information to the terminal equipment, wherein the configuration information is used for indicating the preset time interval.

Optionally, the configuration information is carried by system information block type 1SIB1 and/or radio resource control, RRC, information.

Optionally, the preset time interval is preset based on a protocol.

Optionally, the communication unit 510 is further configured to: sending SIB1 to the terminal device within the preset time interval, wherein the SIB1 is used for indicating whether the network device sends the system information.

Optionally, the network communication unit 510 is specifically configured to: and receiving a first message sent by the terminal equipment on an unlicensed spectrum.

Fig. 6 is a schematic block diagram of a terminal device according to an embodiment of the present application. As shown in fig. 6, the terminal apparatus 600 includes a communication unit 610.

A communication unit 610, configured to send a first message to a network device, where the first message is used to request system information.

The communication unit 610 is further configured to detect the system information in a second window, where the second window is located after a first window, the first window is used to send a second message, and the first window does not transmit the second message, and the second message is used to indicate whether the network device sends the system information.

Optionally, the first message includes a random access preamble, the second message includes a random access response message, and the first window includes a random access response, RAR, window.

Optionally, the first message includes a message for performing a first uplink scheduling transmission in a random access procedure, the second message includes a contention resolution message in the random access procedure, and the first window includes an effective time of a contention resolution timer.

Optionally, the communication unit 610 is specifically configured to: detecting the system information in the second window if the second message is not detected within the first window.

Optionally, the second window is located within a preset time interval after the first window is ended.

Optionally, the communication unit 610 is specifically configured to: and detecting the system information in each second window within a preset time interval after the first end.

Optionally, the communication unit 610 is further configured to: detecting SIB1 for the preset time interval; the terminal device further comprises a processing unit, configured to determine whether the network device sends the system information according to indication information included in the SIB 1; the communication unit 610 is specifically configured to: and under the condition that the network equipment sends the system information, detecting the system information in a receiving window corresponding to the system information.

Optionally, the preset time interval includes at least 1 second window.

Optionally, the communication unit 610 is further configured to: and receiving configuration information sent by the network equipment, wherein the configuration information is used for indicating the preset time interval.

Optionally, the configuration information is carried by system information block type 1SIB1 and/or radio resource control, RRC, information.

Optionally, the preset time interval is preset based on a protocol.

Optionally, the communication unit 610 is further configured to: and under the condition that the system information is detected within the preset time interval, stopping resending the request message of the system information to the network equipment.

Optionally, the communication unit 610 is further configured to: and under the condition that the system information is not detected within the preset time interval, retransmitting the request message of the system information to the network equipment.

Optionally, the communication unit 610 is specifically configured to: transmitting the first message to the network device over an unlicensed spectrum.

Fig. 7 is a schematic structural diagram of a communication device 700 according to an embodiment of the present application. The communication device 700 shown in fig. 7 comprises a processor 710, and the processor 710 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

Optionally, as shown in fig. 7, the communication device 700 may also include a memory 720. From the memory 720, the processor 710 can call and run a computer program to implement the method in the embodiment of the present application.

The memory 720 may be a separate device from the processor 710, or may be integrated into the processor 710.

Optionally, as shown in fig. 7, the communication device 700 may further include a transceiver 730, and the processor 710 may control the transceiver 730 to communicate with other devices, and specifically, may transmit information or data to the other devices or receive information or data transmitted by the other devices.

The transceiver 730 may include a transmitter and a receiver, among others. The transceiver 730 may further include an antenna, and the number of antennas may be one or more.

Optionally, the communication device 700 may specifically be a network device in the embodiment of the present application, and the communication device 700 may implement a corresponding process implemented by the network device in each method in the embodiment of the present application, which is not described herein again for brevity.

Optionally, the communication device 700 may specifically be a terminal device in the embodiment of the present application, and the communication device 700 may implement a corresponding process implemented by the terminal device in each method in the embodiment of the present application, which is not described herein again for brevity.

Fig. 8 is a schematic structural diagram of a chip of an embodiment of the present application. The chip 800 shown in fig. 8 includes a processor 810, and the processor 810 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

Optionally, as shown in fig. 8, chip 800 may further include a memory 820. From the memory 820, the processor 810 can call and run a computer program to implement the method in the embodiment of the present application.

The memory 820 may be a separate device from the processor 810 or may be integrated into the processor 810.

Optionally, the chip 800 may further include an input interface 830. The processor 810 may control the input interface 830 to communicate with other devices or chips, and specifically, may obtain information or data transmitted by other devices or chips.

Optionally, the chip 800 may further include an output interface 840. The processor 810 can control the output interface 840 to communicate with other devices or chips, and in particular, can output information or data to other devices or chips.

Optionally, the chip may be applied to the terminal device in the embodiment of the present application, and the chip may implement the corresponding process implemented by the terminal device in each method in the embodiment of the present application, and for brevity, details are not described here again.

Optionally, the chip may be applied to the network device in the embodiment of the present application, and the chip may implement the corresponding process implemented by the network device in each method in the embodiment of the present application, and for brevity, details are not described here again.

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

It should be understood that the processor of the embodiments of the present application may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The Processor may be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.

It will be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of example, but not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic random access memory (DDR SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchronous SLDRAM (SLDRAM), and Direct Rambus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

It should be understood that the above memories are exemplary but not limiting illustrations, for example, the memories in the embodiments of the present application may also be Static Random Access Memory (SRAM), dynamic random access memory (dynamic RAM, DRAM), Synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (enhanced SDRAM, ESDRAM), Synchronous Link DRAM (SLDRAM), Direct Rambus RAM (DR RAM), and the like. That is, the memory in the embodiments of the present application is intended to comprise, without being limited to, these and any other suitable types of memory.

Fig. 9 is a schematic block diagram of a communication system 900 provided in an embodiment of the present application. As shown in fig. 9, the communication system 900 includes a terminal device 910 and a network device 920.

The terminal device 910 may be configured to implement the corresponding function implemented by the terminal device in the foregoing method, and the network device 920 may be configured to implement the corresponding function implemented by the network device in the foregoing method, for brevity, which is not described herein again.

The embodiment of the application also provides a computer readable storage medium for storing the computer program.

Optionally, the computer-readable storage medium may be applied to the terminal device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the terminal device in each method in the embodiment of the present application, which is not described herein again for brevity.

Optionally, the computer-readable storage medium may be applied to the network device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the network device in each method in the embodiment of the present application, which is not described herein again for brevity.

Embodiments of the present application also provide a computer program product comprising computer program instructions.

Optionally, the computer program product may be applied to the terminal device in the embodiment of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the terminal device in the methods in the embodiment of the present application, which are not described herein again for brevity.

Optionally, the computer program product may be applied to the network device in the embodiment of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the network device in the methods in the embodiment of the present application, which are not described herein again for brevity.

The embodiment of the application also provides a computer program.

Optionally, the computer program may be applied to the terminal device in the embodiment of the present application, and when the computer program runs on a computer, the computer is enabled to execute the corresponding process implemented by the terminal device in each method in the embodiment of the present application, and for brevity, details are not described here again.

Optionally, the computer program may be applied to the network device in the embodiment of the present application, and when the computer program runs on a computer, the computer is enabled to execute the corresponding process implemented by the network device in each method in the embodiment of the present application, and for brevity, details are not described here again.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (58)

1. A method of transmitting system information, comprising:

   the method comprises the steps that network equipment receives a first message sent by terminal equipment, wherein the first message is used for requesting system information;

   and the network equipment sends the system information in a second window under the condition that a second message is not sent in a first window, wherein the second message is used for indicating whether the network equipment sends the system information, and the second window is positioned behind the first window.
2. The method of claim 1, wherein the first message comprises a random access preamble, wherein the second message comprises a random access response message, and wherein the first window comprises a Random Access Response (RAR) window.
3. The method of claim 1, wherein the first message comprises a message for a first uplink scheduled transmission in a random access procedure, wherein the second message comprises a contention resolution message in the random access procedure, and wherein the first window comprises an effective time of a contention resolution timer.
4. A method according to any one of claims 1 to 3, wherein the second window is within a preset time interval after the end of the first window.
5. The method of claim 4, wherein the predetermined time interval comprises at least 1 of the second windows.
6. The method according to claim 4 or 5, characterized in that the method further comprises:

   and the network equipment sends configuration information to the terminal equipment, wherein the configuration information is used for indicating the preset time interval.
7. The method of claim 6, wherein the configuration information is carried by system information block type 1SIB1 and/or Radio Resource Control (RRC) information.
8. The method according to claim 4 or 5, wherein the preset time interval is preset based on a protocol.
9. The method according to any one of claims 4-8, further comprising:

   the network device sends SIB1 to the terminal device within the preset time interval, wherein the SIB1 is used for indicating whether the network device sends the system information.
10. The method according to any of claims 1-9, wherein the network device receives a first message sent by a terminal device, comprising:

    and the network equipment receives a first message sent by the terminal equipment on an unlicensed spectrum.
11. A method of transmitting system information, comprising:

    the method comprises the steps that terminal equipment sends a first message to network equipment, wherein the first message is used for requesting system information;

    the terminal device detects the system information in a second window, wherein the second window is located behind a first window, the first window is used for transmitting a second message, the first window does not transmit the second message, and the second message is used for indicating whether the network device sends the system information.
12. The method of claim 11, wherein the first message comprises a random access preamble, wherein the second message comprises a random access response message, and wherein the first window comprises a Random Access Response (RAR) window.
13. The method of claim 11, wherein the first message comprises a message for a first uplink scheduled transmission in a random access procedure, wherein the second message comprises a contention resolution message in the random access procedure, and wherein the first window comprises an effective time of a contention resolution timer.
14. The method according to any of claims 11-13, wherein the terminal device detects the system information in a second window, comprising:

    and the terminal equipment detects the system information in the second window under the condition that the second message is not detected in the first window.
15. The method according to any of claims 11-14, wherein the second window is within a preset time interval after the end of the first window.
16. The method according to any of claims 11-15, wherein the terminal device detects the system information in a second window, comprising:

    and the terminal equipment detects the system information in each second window within a preset time interval after the first window is finished.
17. The method according to claim 15 or 16, characterized in that the method further comprises:

    the terminal equipment detects a system information block type 1SIB1 in the preset time interval;

    the terminal device detects the system information in a second window, and the method comprises the following steps:

    the terminal equipment determines whether the network equipment sends the system information according to the indication information contained in the SIB 1;

    and under the condition that the network equipment sends the system information, the terminal equipment detects the system information in the second window.
18. The method according to any of claims 15-17, wherein the predetermined time interval comprises at least 1 of the second windows.
19. The method according to any one of claims 15-18, further comprising:

    and the terminal equipment receives configuration information sent by the network equipment, wherein the configuration information is used for indicating the preset time interval.
20. The method of claim 19, wherein the configuration information is carried via SIB1 and/or Radio Resource Control (RRC) information.
21. The method according to any of claims 14-18, wherein the preset time interval is preset based on a protocol.
22. The method according to any one of claims 14-21, further comprising:

    and under the condition that the terminal equipment detects the system information in the preset time interval, stopping resending the request message of the system information to the network equipment.
23. The method according to any one of claims 14-21, further comprising:

    and the terminal equipment resends the request message of the system information to the network equipment under the condition that the system information is not detected in the preset time interval.
24. The method according to any of claims 11-23, wherein the terminal device sends a first message to a network device, comprising:

    the terminal device sends the first message to the network device on an unlicensed spectrum.
25. A network device, comprising:

    the communication unit is used for receiving a first message sent by terminal equipment, wherein the first message is used for requesting system information;

    the communication unit is further configured to send the system information in a second window when a second message is not sent in the first window, where the second message is used to indicate whether the network device sends the system information, and the second window is located after the first window.
26. The network device of claim 25, wherein the first message comprises a random access preamble, wherein the second message comprises a random access response message, and wherein the first window comprises a Random Access Response (RAR) window.
27. The network device of claim 25, wherein the first message comprises a message for a first uplink scheduled transmission in a random access procedure, wherein the second message comprises a contention resolution message in the random access procedure, and wherein the first window comprises an effective time of a contention resolution timer.
28. The network device of any of claims 25-27, wherein the second window is within a preset time interval after the end of the first window.
29. The network device of claim 28, wherein the predetermined time interval comprises at least 1 of the second windows.
30. The network device of claim 28 or 29, wherein the communication unit is further configured to:

    and sending configuration information to the terminal equipment, wherein the configuration information is used for indicating the preset time interval.
31. The network device of claim 30, wherein the configuration information is carried via system information block type 1SIB1 and/or Radio Resource Control (RRC) information.
32. The network device of claim 28 or 29, wherein the preset time interval is preset based on a protocol.
33. The network device of any one of claims 28-32, wherein the communication unit is further configured to:

    sending SIB1 to the terminal device within the preset time interval, wherein the SIB1 is used for indicating whether the network device sends the system information.
34. The network device according to any of claims 25-33, wherein the network communication unit is specifically configured to:

    and receiving a first message sent by the terminal equipment on an unlicensed spectrum.
35. A terminal device, comprising:

    a communication unit, configured to send a first message to a network device, where the first message is used to request system information;

    the communication unit is further configured to detect the system information in a second window, where the second window is located after a first window, the first window is used to transmit a second message, and the first window does not transmit the second message, and the second message is used to indicate whether the network device sends the system information.
36. The terminal device of claim 35, wherein the first message comprises a random access preamble, wherein the second message comprises a random access response message, and wherein the first window comprises a random access response, RAR, window.
37. The terminal device of claim 35, wherein the first message comprises a message for performing a first uplink scheduled transmission in a random access procedure, wherein the second message comprises a contention resolution message in the random access procedure, and wherein the first window comprises an effective time of a contention resolution timer.
38. The terminal device according to any of claims 35-37, wherein the communication unit is specifically configured to:

    detecting the system information in the second window if the second message is not detected within the first window.
39. A terminal device according to any of claims 35-38, wherein the second window is within a preset time interval after the end of the first window.
40. The terminal device according to any of claims 35-39, wherein the communication unit is specifically configured to:

    and detecting the system information in each second window within a preset time interval after the first window is finished.
41. The terminal device according to claim 39 or 40,

    the communication unit is further configured to: detecting a system information block type 1SIB1 within the preset time interval;

    the terminal device further comprises a processing unit, configured to determine whether the network device sends the system information according to indication information included in the SIB 1;

    the communication unit is specifically configured to: and under the condition that the network equipment transmits the system information, detecting the system information in the second window.
42. A terminal device according to any of claims 39-41, wherein the predetermined time interval comprises at least 1 of the second windows.
43. The terminal device of any one of claims 39-42, wherein the communication unit is further configured to:

    and receiving configuration information sent by the network equipment, wherein the configuration information is used for indicating the preset time interval.
44. The terminal device of claim 43, wherein the configuration information is carried via SIB1 and/or Radio Resource Control (RRC) information.
45. A terminal device according to any of claims 39-42, wherein the predetermined time interval is predetermined based on a protocol.
46. The terminal device of any one of claims 39-45, wherein the communication unit is further configured to:

    and under the condition that the system information is detected within the preset time interval, stopping resending the request message of the system information to the network equipment.
47. The terminal device of any one of claims 39-45, wherein the communication unit is further configured to:

    and under the condition that the system information is not detected within the preset time interval, retransmitting the request message of the system information to the network equipment.
48. The terminal device according to any of claims 35-47, wherein the communication unit is specifically configured to:

    transmitting the first message to the network device over an unlicensed spectrum.
49. A network device, comprising: a processor and a memory, the memory for storing a computer program, the processor for invoking and executing the computer program stored in the memory, performing the method of claims 1 to 10.
50. A terminal device, comprising: a processor and a memory, the memory for storing a computer program, the processor for invoking and executing the computer program stored in the memory, performing the method of any one of claims 11 to 24.
51. A chip, comprising: a processor for calling and running a computer program from a memory so that a device on which the chip is installed performs the method of any one of claims 1 to 10.
52. A chip, comprising: a processor for calling and running a computer program from a memory so that a device on which the chip is installed performs the method of any one of claims 11 to 24.
53. A computer-readable storage medium for storing a computer program which causes a computer to perform the method of any one of claims 1 to 10.
54. A computer-readable storage medium for storing a computer program which causes a computer to perform the method of any one of claims 11 to 24.
55. A computer program product comprising computer program instructions for causing a computer to perform the method of any one of claims 1 to 10.
56. A computer program product comprising computer program instructions for causing a computer to perform the method of any one of claims 11 to 24.
57. A computer program, characterized in that the computer program causes a computer to perform the method according to any one of claims 1 to 10.
58. A computer program, characterized in that the computer program causes a computer to perform the method according to any of claims 11-24.

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