WO2020087476A1 - Procédé et dispositif de transmission d'informations de système - Google Patents

Procédé et dispositif de transmission d'informations de système Download PDF

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Publication number
WO2020087476A1
WO2020087476A1 PCT/CN2018/113539 CN2018113539W WO2020087476A1 WO 2020087476 A1 WO2020087476 A1 WO 2020087476A1 CN 2018113539 W CN2018113539 W CN 2018113539W WO 2020087476 A1 WO2020087476 A1 WO 2020087476A1
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WIPO (PCT)
Prior art keywords
message
window
system information
terminal device
network device
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PCT/CN2018/113539
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English (en)
Chinese (zh)
Inventor
石聪
杨宁
徐伟杰
贺传峰
史志华
Original Assignee
Oppo广东移动通信有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to PCT/CN2018/113539 priority Critical patent/WO2020087476A1/fr
Priority to CN201880094975.1A priority patent/CN112352453B/zh
Publication of WO2020087476A1 publication Critical patent/WO2020087476A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the embodiments of the present application relate to the field of communication technologies, and in particular, to a method and device for transmitting system information.
  • the terminal device When the terminal device needs to use system information (SI), it can request the SI to obtain the SI, and the network device can indicate whether the SI is transmitted through a response message. However, due to some reasons, such as the network device does not listen to a channel that can be used to reply to the response message, the network device cannot reply to the response message to the terminal device, or the terminal device fails to receive the response message, the terminal device needs to report to the network device again Request to obtain the SI, which will greatly delay the time for the terminal device to acquire the SI.
  • SI system information
  • Embodiments of the present application provide a method and device for transmitting system information, which can speed up the time for the terminal device to acquire system information.
  • a method for transmitting system information including: a network device receives a first message sent by a terminal device, the first message is used to request system information; the network device does not send a second message in a first window In the case of a message, the system information is sent in a second 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.
  • a method for transmitting system information including: a terminal device sends a first message to a network device, the first message is used to request system information; the terminal device detects the system information in a second window, Wherein the second window is located after the first window, the first window is used to transmit a second message and the first window does not transmit the second message, the second message is used to indicate the network device Whether to send the system information.
  • a network device for performing the method in the first aspect or its implementations.
  • the physical device includes a functional module for performing the method in the above-mentioned first aspect or various implementations thereof.
  • a terminal device configured to execute the method in the above-mentioned second aspect or various implementations thereof.
  • the terminal device includes a functional module for performing the method in the above-mentioned second aspect or various implementations thereof.
  • a communication device for performing the methods in the above first to second aspects.
  • the communication device includes a functional module for performing the methods in the above first to second aspects.
  • a communication device including a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory to perform the methods in the first aspect to the second aspect.
  • a chip is provided for implementing the methods in the above first to second aspects.
  • the chip includes a processor for calling and running a computer program from the memory, so that the device installed with the chip executes the method as described in the first aspect to the second aspect above.
  • a computer-readable storage medium for storing a computer program, which causes the computer to execute the methods in the above first to second aspects.
  • a computer program product which includes computer program instructions, and the computer program instructions cause the computer to execute the method in the above first to second aspects.
  • a computer program which, when run on a computer, causes the computer to execute the methods in the above first to second aspects.
  • the network device may end in the first window even if it cannot reply to the second message in the first window to indicate whether to send the system information After that, send the system information in the second window. 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, it may continue to detect system information in the second window. In this way, the delay caused by the terminal device not requesting the second message in the first window and requesting the system information from the network device again can be avoided.
  • the technical solution provided by the present application can speed up the time for the terminal device to obtain system information.
  • FIG. 1 is a schematic diagram of a communication system architecture provided by an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a method for transmitting system information provided by an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a random access process provided by 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 provided by an embodiment of the present application.
  • FIG. 6 is a schematic block diagram of a terminal device provided by 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 by an embodiment of the present application.
  • FIG. 9 is a schematic block diagram of a communication system provided by an embodiment of the present application.
  • GSM Global System of Mobile
  • CDMA Code Division Multiple Access
  • WCDMA Broadband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access, WiMAX
  • the 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, terminal).
  • the network device 110 can provide communication coverage for a specific geographic area, and can communicate with terminal devices located within the coverage area.
  • the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, or an evolved base station in an LTE system (Evolutional Node B, eNB or eNodeB), or a wireless controller in the Cloud Radio Access Network (CRAN), or the network equipment can be a mobile switching center, a relay station, an access point, an in-vehicle device, Wearable devices, hubs, switches, bridges, routers, network-side devices in 5G networks or network devices in future public land mobile networks (Public Land Mobile Network, PLMN), etc.
  • BTS Base Transceiver Station
  • NodeB, NB base station
  • LTE Long Term Evolutional Node B
  • eNodeB evolved base station in an LTE system
  • CRAN Cloud Radio Access Network
  • the network equipment can be a mobile switching center, a relay station, an access point, an in-veh
  • the communication system 100 also includes at least one terminal device 120 within the coverage of the network device 110.
  • terminal equipment includes, but is not limited to, connections via wired lines, such as via Public Switched Telephone Networks (PSTN), Digital Subscriber Lines (DSL), digital cables, and direct cable connections ; And / or another data connection / network; and / or via wireless interfaces, such as for cellular networks, wireless local area networks (Wireless Local Area Network, WLAN), digital TV networks such as DVB-H networks, satellite networks, AM- FM broadcast transmitter; and / or another terminal device configured to receive / transmit communication signals; and / or Internet of Things (IoT) equipment.
  • PSTN Public Switched Telephone Networks
  • DSL Digital Subscriber Lines
  • WLAN wireless local area networks
  • digital TV networks such as DVB-H networks, satellite networks, AM- FM broadcast transmitter
  • IoT Internet of Things
  • a terminal device configured to communicate through a wireless interface may be referred to as a "wireless communication terminal", “wireless terminal”, or “mobile terminal”.
  • mobile terminals include, but are not limited to, satellite or cellular phones; Personal Communication Systems (PCS) terminals that can combine cellular radiotelephones with data processing, fax, and data communication capabilities; can include radiotelephones, pagers, Internet PDA with network access, web browser, notepad, calendar, and / or Global Positioning System (GPS) receiver; and conventional laptop and / or palm-type receivers or others including radiotelephone transceivers Electronic device.
  • PCS Personal Communication Systems
  • GPS Global Positioning System
  • Terminal equipment can refer to access terminal, user equipment (User Equipment, UE), user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or User device.
  • Access terminals can be cellular phones, cordless phones, Session Initiation Protocol (SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital processing (Personal Digital Assistant (PDA), wireless communication Functional handheld devices, computing devices, or other processing devices connected to a wireless modem, in-vehicle devices, wearable devices, terminal devices in a 5G network, or terminal devices in a future-evolving PLMN, etc.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • the 5G system or 5G network may also be referred to as a New Radio (NR) system or NR network.
  • NR New Radio
  • FIG. 1 exemplarily shows one network device and two terminal devices.
  • the communication system 100 may include multiple network devices and each network device may include other numbers of terminal devices within the coverage area. This application The embodiment does not limit this.
  • the communication system 100 may further include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiments of the present application.
  • network entities such as a network controller and a mobility management entity, which is not limited in the embodiments of the present application.
  • the devices with communication functions in the network / system in the embodiments of the present application may be referred to as communication devices.
  • the communication device may include a network device 110 and a terminal device 120 with a communication function, and the network device 110 and the terminal device 120 may be the specific devices described above, which will not be repeated here
  • the communication device may also include other devices in the communication system 100, such as network controllers, mobility management entities, and other network entities, which are not limited in the embodiments of the present application.
  • System information can be divided into a master information block (master information block, MIB) and a variety of system information blocks (system information block, SIB).
  • MIB master information block
  • SIB system information block
  • the MIB can be sent on a dedicated channel in a fixed cycle, and the MIB contains the necessary information for the terminal device to receive the system information block type 1 (SIB1).
  • SIB1 contains the necessary information for the terminal device to receive other SIBs.
  • SIBs other than SIB1 can be configured to be transmitted in one or more SI messages (messages), and each SI message can be sent in a SI window, which can also be called a system information sending window.
  • the SI window appears periodically, that is, system information can be sent periodically.
  • the mapping relationship between other SIB and SI message, and the configuration information related to SI message transmission can be indicated in SIB1.
  • the terminal device After receiving the SIB1 sent by the network device, the terminal device can obtain information such as the SI message used for transmitting other SIBs and the sending window of the SI message according to the instruction information in the SIB.
  • SIB transmission methods there are two other SIB transmission methods.
  • One is that network devices can periodically send system information.
  • the other is that when the terminal device needs to use a certain part of the SI message, it can send a SI request message to the network device. After receiving the request message sent by the terminal device, the network device can broadcast the SI message for a period of time according to the needs of the terminal device .
  • the difference between the above two transmission methods is whether the SI message is always sent by broadcast or only after a request based on the terminal device.
  • the sending position of the SI message is in accordance with the SIB configured in SIB1
  • the mapping relationship with SI messages and the transmission configuration information of SI messages are sent.
  • the terminal device may send a first message to the network device, the first message may be used to request SI, and after receiving the first message, the network device may inform the terminal device of the second message via a second message Send the SI. If the network device indicates to send the SI in the second message, the terminal device may detect the SI in the window of the SI. If the network device indicates that SI is not sent in the second message, the terminal device may not detect SI in the window of SI.
  • the first message may be a message in a random access process, and the terminal device may send an SI request to the network device through the random access process.
  • the terminal device may send an SI request to the network device through message 1 (message1, MSG1) or MSG3, and the network device may reply to the SI request through MSG2 or MSG4.
  • message 1 messages1, MSG1 or MSG3
  • MSG2 MSG4
  • MSG4 MSG4
  • MSG2 or MSG4 it can be sent in the sending window of MSG2 or MSG4.
  • the network device may not be able to send the second message (such as MSG2 or MSG4) to the terminal device within the sending window of the second message.
  • the network device cannot send the system information because it did not successfully send the second message
  • the window sends system information. Since the terminal device does not receive the second message and does not know whether the SI has sent the SI, it will consider that the request has failed, and then re-send the SI request to the network device to obtain the SI. In this case, the entire process for the terminal device to acquire system information needs to be restarted from the request for system information, which will greatly delay the time for the terminal device to acquire system information.
  • the network device cannot successfully send the second message. It can mean that the network device cannot send the second message to the terminal device on the authorized spectrum due to the protocol mechanism, or it can mean that the network device cannot detect Using the channel, the second message cannot be successfully sent.
  • the network device After the terminal device sends the SI request 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 re-send the system information request message to the network device.
  • the terminal device and the network device need to detect the channel before sending the signal.
  • an available channel that is, when the channel is in an idle state, it indicates that the channel detection is successful, and the channel can be used to transmit signals.
  • no available channel that is, when the current channels are all occupied, signal transmission cannot be performed at this time.
  • the network device After the terminal device successfully sends the first message, for example, after the terminal device successfully sends MSG1 to request a certain SI, the network device cannot obtain an available channel due to continuous listen-before-talk (LBT) failure, so the network device MSG2 cannot be sent on a random access response (RAR) window. Since the terminal device does not receive MSG2 on the RAR window, it considers that the request has failed, and then sends the SI request to the network device again.
  • LBT listen-before-talk
  • RAR random access response
  • the terminal device has successfully sent an MSG3 message to request an SI, but due to the failure of the network device LBT, it cannot send MSG4 within the effective time of the contention resolution timer, that is, the network device has not listened after the contention resolution timer expires
  • the terminal device does not receive the MSG4 sent by the network device within the effective time of the contention resolution timer, it considers the request to fail, and then sends the SI request to the network device again.
  • the foregoing process that the terminal device re-initiates the system information request process because the network device cannot reply to the second message will delay the time that the terminal device obtains the system information.
  • Embodiments of the present application provide a method for transmitting system information, which can speed up the time for a terminal device to acquire system information.
  • the first message and the second message in the embodiments of the present application may not be messages specifically used to request system information, the first messages and the second messages may have their own functions, and the first messages and the second messages may not be used to request the system Information function.
  • MSG1 may not carry the system information identifier
  • MSG1 may be used to request system information
  • MSG1 can be used to request random access.
  • MSG2 may not carry the indication information of whether to transmit the system information, and if MSG2 does not carry the indication information, MSG2 may be used to respond to the random access request.
  • FIG. 2 shows a schematic flowchart of a method for transmitting system information according to an embodiment of the present application.
  • the method of FIG. 2 includes steps 210-220.
  • the terminal device sends a first message to the network device, where the first message is used to request system information.
  • the system information may refer to other system information except SIB1.
  • the terminal device may send a first message to the network device to request one system information or multiple system information.
  • the terminal device sending the first message to the network device may refer to the terminal device sending the first message to the network device on the authorized spectrum, or may refer to the terminal device sending the first message to the network device on the unlicensed spectrum.
  • the terminal device requesting the system information through the first message may refer to that the terminal device carries the system information identifier in the first message to request the system information, or the terminal device requests the system information in an implicit manner.
  • the identifier of the system information may be a random access resource associated with the system information, including specific time domain resources and / or frequency domain resources.
  • 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.
  • RRC radio resource control
  • the terminal device requests system information in an implicit manner, which may refer to the terminal device requesting system information from the network device through other information.
  • the first message may refer to a message in a random access process, or may refer to a message in another process (for example, a normal communication process after random access is completed).
  • the network device sends the system information in the second window when 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 in the first window after that.
  • the terminal device may detect the system information in the second window, where the second window may be located after the first window.
  • the first window is used to transmit the second message
  • the second message is used to indicate whether the network device sends the system information.
  • the terminal device detecting the system information in the second window may refer to the case where the second message is not transmitted in the first window, or the terminal device may not detect the second message in the first window, the terminal device may Detect the system information directly in the second window.
  • the second message not transmitted in the first window may mean that the network device has not sent the second message in the first window, or may mean that the network device has sent the second message in the first window, but the terminal device has not successfully received the second message.
  • the terminal device detects the system information in the second window, and may also mean that the terminal device directly detects the system information in the second window after sending the first message, and does not need to detect the second in the first window.
  • the terminal device may first detect the second message in the first window, and then determine whether the system information needs to be detected in the second window according to the content of the second message. If the second message indicates that the network device sends the system information, the terminal device detects the system information in the second window. If the second message indicates that the network device does not send the system information, the terminal device may not detect the system information in the second window.
  • the first window may be a window for sending a second message, and the first window may be a pre-configured window.
  • the first window may be a time interval specified in the agreement.
  • the first window may be within several subframes after the network device receives the first message.
  • the second window may be a window preset in the protocol, or the second window is a window negotiated between the terminal device and the network device, so as to ensure that the network device can be in the correct position after the network device sends system information in the second window Received the system information.
  • the second window may be a window specified in the protocol specifically for sending system information.
  • the second window has a fixed transmission position, and the position of the second window may be indicated in SIB1.
  • the first message and the second message may refer to messages during random access.
  • the terminal device can synchronize with the network device through the random access process. After synchronization with the network device, the terminal device can perform uplink transmission.
  • the terminal device may request to obtain system information through a random access process.
  • the first message and the second message may include messages in the random access process. The random access process will be described below in conjunction with FIG. 3.
  • the random access process usually adopts a contention-based four-step random access process.
  • the following describes the four-step random access process with reference to FIG. 3.
  • the embodiments of the present application only use contention-based random access as an example for description, but the present application is not limited thereto, 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 SI based on a non-contention random access procedure.
  • the terminal device sends MSG1 to the network device.
  • the MSG1 may include a random access preamble.
  • the network device may send the MSG2 on a downlink shared channel (DL-SCH).
  • MSG2 is Random Access Response (Random Access Response, RAR).
  • the network device can use MSG2 to inform the terminal device of available uplink resource information.
  • the RAR sent by the network device can be sent on the RAR window.
  • the RAR window may refer to several subframes after the terminal device sends the random access preamble.
  • the RAR window may be within 2 to 10 subframes after the third subframe after the terminal device sends the random access preamble.
  • the RAR response carries the timing advance (TA) adjustment and uplink resource information that can be used for uplink transmission and the temporary cell radio network temporary identifier (temporary cell radio network temporary identifier, T-CRNTI), that is, temporary CRNTI.
  • TA timing advance
  • T-CRNTI temporary cell radio network temporary identifier
  • the RAR response may be generated by the media access control (MAC) layer of the network device.
  • MAC media access control
  • One MSG2 can simultaneously respond to random access request responses from multiple terminal devices.
  • the terminal device After receiving the MSG2, the terminal device determines whether it belongs to its own RAR message, and when it is determined to belong to itself, it sends a message 3 (message3, MSG3) in the upstream resource designated by the MSG2.
  • the MSG3 carries the terminal device specific RNTI. MSG3 can also be understood as being used for the first uplink transmission.
  • MSG3 can contain different content. If it is in the initial access process, MSG3 may carry the RRC connection request generated by the RRC layer, and the RRC connection request may include the temporary identification code or random number of the terminal device. If it is in the process of connection re-establishment, MSG3 can carry the RRC connection re-establishment request generated by the RRC layer. If it is in the handover process, MSG3 can transmit the RRC handover completion message generated by the RRC layer and the C-RNTI of the terminal device.
  • the network device may send an MSG4 message to the terminal device.
  • the MSG4 includes the contention resolution message and the uplink transmission resources allocated by the network device to the terminal device.
  • the contention resolution message may be sent within the effective time of the contention resolution timer.
  • the effective time of the contention resolution timer may be started after the terminal device performs the first uplink scheduled transmission and ends after the timer duration expires.
  • the duration of the timer may be the duration specified in the protocol, or the duration configured by the network device to the terminal device, or the duration negotiated between the terminal device and the network device.
  • the terminal device After receiving the MSG4, the terminal device can detect whether the specific identifier sent in the MSG3 is included in the contention resolution message sent by the network device. If included, it indicates that the random access process of the terminal device is successful, otherwise it is considered that the random process fails. After the random access process fails, the terminal device needs to initiate the random access process again from the first step.
  • the terminal device requests SI through a random access process, which may refer to the terminal device requesting SI through MSG1 or MSG3, or the terminal device may also request SI through other messages in the random access process.
  • the terminal device may request the SI through the first message.
  • the first message may include MSG1, or the first message may include a message for sending a random access preamble.
  • the terminal device sending the first message to the network device may refer to the terminal device sending a random access preamble to the network device, where the random access preamble is at least used to request the system information.
  • the first message includes MSG1.
  • the first message can also be used to make a normal random access request.
  • the first message may include MSG3, or the first message may include a message used for the first uplink scheduled transmission in the random access process.
  • the terminal device sending the first message to the network device may refer to the terminal device sending a message for the first uplink scheduled transmission in the random access process to the network device, and the message may include the requested system information Logo.
  • the first message includes MSG3.
  • the first message can also be used for normal first uplink scheduled transmission.
  • the terminal device requests SI through a random access process.
  • the embodiments of the present application are not limited to this, and SI may also be requested through other processes, for example, after the terminal device successfully accesses the network, the normal uplink transmission with the network device During the process, SI is requested through uplink transmission.
  • the network device does not reply to the second message in the first window, it may mean that on an unlicensed spectrum, the network device does not listen to the available channel before the end of the first window. For unlicensed spectrum, the network device needs to listen to the channel before responding to the first message used to request system information. If the network device cannot hear the available channel in the first window, the network The device does not feedback the second message.
  • the network device may continue to listen to the available channel after the first window ends, and send the system information in the second window after listening to the available channel.
  • the first window may be a time interval specified in the agreement. For example, it may be within several subframes after the network device receives the first message.
  • the second window may refer to the sending window of SI messages, the sending window of SI messages may appear periodically, the sending window of SI messages may be indicated in SIB1, and the network device may send the system information in every sending window of SI messages .
  • the network device listening to the available channel after the end of the first window may refer to the network device always listening to the channel after the end of the first window, or it may mean that the network device only listens to the channel at the position of the second window.
  • the network device can always listen to the channel after the first window ends, and after listening to the available channel, send some placeholder signals, and after waiting for the sending position of the second window, in the second window Send the system information.
  • the network device may listen to the channel after the end of the first window and the position of the second window, and send the system information at the position of the second window after detecting the available channel.
  • the first message may include a random access preamble
  • the second message includes a random access response message
  • the first window may include a RAR window.
  • the first message includes a message for performing the first uplink scheduled transmission during the random access process
  • the second message includes the contention resolution message during the random access process
  • the first window includes the effective time of the contention resolution timer.
  • the RAR window may refer to several subframes after the terminal device sends the random access preamble.
  • the RAR window may be within 2 to 10 subframes after the third subframe after the terminal device sends the random access preamble.
  • the network device When the terminal device sends a system information request to the network device through the first uplink scheduled transmission, the network device needs to reply to the contention resolution message before the contention resolution timer expires.
  • 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 scheduled transmission, and the duration of the timer may be the duration specified in the protocol.
  • the network device does not reply to the second message in the first window, it 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 within the effective time of the contention resolution timer.
  • the terminal device does not receive the second message in the first window, it 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 within the effective time of the contention resolution timer.
  • the network device sends the system information, which may be the SI message corresponding to the system information sent by the network device, and the correspondence between the system information and the SI message is indicated by SIB1.
  • a terminal device may send a first message to a network device on an unlicensed spectrum to request to obtain certain system information.
  • the network device may send a second message to the terminal device to indicate whether to send system information. If the second message instructs the network device to send system information, the terminal device detects system information in the second window. If the second message indicates that the network device does not send system information, the terminal device does not detect system information in the second window.
  • the network device cannot successfully send the second message and cannot indicate to the terminal device whether to send system information. In this way, even if 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 the failure to reply to the second message in the first window. Since the terminal device does not receive the second message, it considers that the request has failed, and sends the request for the system information to the network device again. In this way, the process of the terminal device requesting to obtain the system information will start to restart, which will greatly delay the time for the terminal device to obtain the system information.
  • the network device may 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 ends. If the system information is detected, the system information is received. The terminal device does not need to re-send the system information request to the network device because the second information is not obtained in the first window.
  • the solution of the embodiment of the present application can speed up the time for the terminal device to obtain system information.
  • the network device successfully sends the second message.
  • 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 terminal device industry can continue to detect the system information in the second window within a preset time instead of immediately Request to resend system information to network equipment.
  • the network device can send the system information on the pre-configured second window, which can speed up the time for the terminal device to obtain the system information.
  • the second window may be located within a preset time interval after the end of the first window.
  • the window indicated by the grid line is the first window
  • the window indicated by the vertical line is the second window.
  • three 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 refer to the network device not listening to the available channel before the end of the first window shown in FIG. 4, then the network device may Continue to listen to the channel within a preset time interval. In this way, the setting of the preset time interval can avoid the waste of resources caused by the network device constantly listening to the available channel to send system information after the first window ends. If the network device has not heard the available channel within the preset time interval, it can choose not to continue listening to the available channel to send system information.
  • the terminal device may refer to that the terminal device does not detect the second message in the first window shown in FIG.
  • the second window within the set time interval continues to detect system information.
  • the setting of the preset time interval can avoid that the terminal device always detects the system information at the position of the second window, thereby causing a waste of resources.
  • the terminal device may choose to resend the system information request to the network device.
  • the preset time interval may include at least one second window, that is, the preset time interval may be greater than the transmission period of system information. This can ensure that the network device can send the system information in a corresponding second window when the available channel is detected after the end of the first window.
  • the preset time interval includes three second windows. If the network device listens to the available channel before the second window a, it can send system information at the positions of the three second windows, or send system information at part of the positions of the three second windows; If the network device detects an available channel between the second window a and the second window b, the network device may send system information at the positions of the second window b and the second window c, or in the two second windows The system information is sent at the position of part of the window in; if the network device detects an available channel between the second window b and the second window c, the network device can send the system information at the position of the second window c.
  • the preset time interval may be a time interval specified in the protocol, or may be a time interval configured by the network device to the terminal device.
  • the network device may send configuration information to the terminal device, and the configuration information may be used to indicate a preset time interval.
  • 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 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.
  • the configuration information may be sent by the network device to the terminal device after the terminal device requests the network device, or the configuration information may also be sent by the network device to the terminal device periodically.
  • the network device may also indicate to the terminal device whether to send the system information by sending SIB1 within a preset time interval.
  • the network device may send SIB1 to the terminal device, and the 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 of instructing whether to send the system information through SIB1.
  • the network device may carry the indication information in SIB1 when sending system information, and may not carry the indication information in SIB1 when sending no system information.
  • the network device may not carry the indication information to indicate in the SIB1 when sending the system information, and may carry the indication information to indicate in the SIB1 when the system information is not sent.
  • SIB1 carries instruction information to indicate.
  • the terminal device may first detect SIB1 sent by the network device within a preset time interval, wherein the transmission configuration information of SIB1 may be indicated in the MIB. After receiving the SIB1, the terminal device may determine whether the network device has sent the requested system information based on the content in the SIB1. If the network device has sent the system information, the terminal device may detect the system information in the second window; if the network device has not sent the system information, the terminal device may not detect the system information in the second window. Of course, the terminal device may detect the system information in the second window regardless of whether the network device successfully sends the system information.
  • the terminal device may continue to detect in the second window whether the network device has sent the requested system information. During the process of detecting the system information in the second window, the terminal device may continue the request process of reapplying for the system information. 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 sent by the network device, the terminal device may resend the system information request to the network device. In this way, the time for the terminal device to obtain system information can be further accelerated.
  • the request to resend the system information may use the same message as the initial request, or may use a different message from the initial request.
  • the terminal device can send the initial request for system information to the network device through MSG1. If the system information sent by the network device is not received within the preset time interval, it can send MSG1 to the network device again to request the system information, or Send MSG3 to the network device to request the system information again.
  • FIG. 5 is a schematic block diagram of a network device provided by an embodiment of the present application. As shown in FIG. 5, the network device 500 includes a communication unit 510.
  • the communication unit 510 is configured to receive a first message sent by a terminal device, where the first message is used to request system information.
  • the communication unit 510 is further configured to send the system information in the 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 Sending the system information, the second window is located behind the first window.
  • the first message includes a random access preamble
  • the second message includes a random access response message
  • the second window includes a random access response RAR window.
  • the first message includes a message for performing the first uplink scheduled transmission during the random access process
  • the second message includes a contention resolution message during the random access process
  • the first window includes The effective time of the contention resolution timer
  • the second window is located within a preset time interval after the end of the first window.
  • the preset time interval includes at least one second window.
  • the communication unit 510 is further configured to send configuration information to the terminal device, where the configuration information is used to indicate the preset time interval.
  • the configuration information is carried through system information block type 1SIB1 and / or radio resource control RRC information.
  • the preset time interval is preset based on a protocol.
  • the communication unit 510 is further configured to send SIB1 to the terminal device within the preset time interval, where the SIB1 is used to indicate whether the network device sends the system information.
  • the network communication unit 510 is specifically configured to: receive the first message sent by the terminal device on an unlicensed spectrum.
  • the terminal device 600 includes a communication unit 610.
  • the communication unit 610 is configured to send a first message to the 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 the first window, the first window is used to send a second message and the first window is not transmitted.
  • the second message is used to indicate whether the network device sends the system information.
  • the first message includes a random access preamble
  • the second message includes a random access response message
  • the first window includes a random access response RAR window.
  • the first message includes a message for performing the first uplink scheduled transmission during the random access process
  • the second message includes a contention resolution message during the random access process
  • the first window includes the contention Solve the effective time of the timer.
  • the communication unit 610 is specifically configured to: when the second message is not detected in the first window, detect the system information in the second window.
  • the second window is located within a preset time interval after the end of the first window.
  • the communication unit 610 is specifically configured to detect the system information in each of the second windows within a preset time interval after the first end.
  • the communication unit 610 is further configured to: detect SIB1 within the preset time interval; the terminal device further includes a processing unit, configured to determine the network device according to the indication information contained in the SIB1 Whether to send the system information; the communication unit 610 is specifically configured to: when the network device sends the system information, detect the system information in a receiving window corresponding to the system information.
  • the preset time interval includes at least one second window.
  • the communication unit 610 is further configured to: receive configuration information sent by the network device, and the configuration information is used to indicate the preset time interval.
  • the configuration information is carried through system information block type 1SIB1 and / or radio resource control RRC information.
  • the preset time interval is preset based on a protocol.
  • the communication unit 610 is further configured to: when the system information is detected within the preset time interval, stop sending the system information request message to the network device again.
  • the communication unit 610 is further configured to: when the system information is not detected within the preset time interval, resend the system information request message to the network device.
  • the communication unit 610 is specifically configured to send the first message to the network device on an unlicensed spectrum.
  • FIG. 7 is a schematic structural diagram of a communication device 700 provided by an embodiment of the present application.
  • the communication device 700 shown in FIG. 7 includes a processor 710, and the processor 710 can call and run a computer program from the memory to implement the method in the embodiments of the present application.
  • the communication device 700 may further include a memory 720.
  • the processor 710 can call and run a computer program from the memory 720 to implement the method in the embodiments of the present application.
  • the memory 720 may be a separate device independent of the processor 710, or may be integrated in the processor 710.
  • the communication device 700 may further include a transceiver 730, and the processor 710 may control the transceiver 730 to communicate with other devices, specifically, may send information or data to other devices, or receive other Information or data sent by the device.
  • the processor 710 may control the transceiver 730 to communicate with other devices, specifically, may send information or data to other devices, or receive other Information or data sent by the device.
  • the transceiver 730 may include a transmitter and a receiver.
  • the transceiver 730 may further include antennas, and the number of antennas may be one or more.
  • the communication device 700 may specifically be a network device according to an embodiment of the present application, and the communication device 700 may implement the corresponding process implemented by the network device in each method of the embodiment of the present application. .
  • the communication device 700 may specifically be a terminal device according to an embodiment of the present application, and the communication device 700 may implement the corresponding process implemented by the terminal device in each method of the embodiment of the present application. .
  • FIG. 8 is a schematic structural diagram of a chip according to 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 the memory to implement the method in the embodiment of the present application.
  • the chip 800 may further include a memory 820.
  • the processor 810 can call and run a computer program from the memory 820 to implement the method in the embodiments of the present application.
  • the memory 820 may be a separate device independent of the processor 810, or may be integrated in the processor 810.
  • the chip 800 may further include an input interface 830.
  • the processor 810 can control the input interface 830 to communicate with other devices or chips. Specifically, it can obtain information or data sent by other devices or chips.
  • 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. Specifically, it can output information or data to other devices or chips.
  • the chip can be applied to the terminal device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the terminal device in each method of the embodiment of the present application.
  • the chip can implement the corresponding process implemented by the terminal device in each method of the embodiment of the present application.
  • 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 of the embodiment of the present application.
  • 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 of the embodiment of the present application.
  • chips mentioned in the embodiments of the present application may also be referred to as system-on-chips, system chips, chip systems, or system-on-chip chips.
  • the processor in the embodiment of the present application may be an integrated circuit chip, which has signal processing capabilities.
  • each step of the foregoing method embodiment may be completed by an integrated logic circuit of hardware in a processor or instructions in the form of software.
  • the above-mentioned processor may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an existing programmable gate array (Field Programmable Gate Array, FPGA), or other available Programming logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present application may be implemented or executed.
  • the 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 conjunction with the embodiments of the present application may be directly embodied and executed by a hardware decoding processor, or may be executed and completed by a combination of hardware and software modules in the decoding processor.
  • the software module may be located in a mature storage medium in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, and registers.
  • the storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.
  • the memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electronically Erasable programmable read only memory (Electrically, EPROM, EEPROM) or flash memory.
  • the volatile memory may be a random access memory (Random Access Memory, RAM), which is used as an external cache.
  • RAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM DDR SDRAM
  • enhanced SDRAM ESDRAM
  • Synchlink DRAM SLDRAM
  • Direct Rambus RAM Direct Rambus RAM
  • the memory in the embodiments of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous) DRAM (SDRAM), double data rate synchronous dynamic random access memory (double data) SDRAM (DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and so on. That is to say, the memories in the embodiments of the present application are intended to include but are not limited to these and any other suitable types of memories.
  • FIG. 9 is a schematic block diagram of a communication system 900 provided by 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 can be used to implement the corresponding functions implemented by the terminal device in the above method
  • the network device 920 can be used to implement the corresponding functions implemented by the network device in the above method.
  • Embodiments of the present application also provide a computer-readable storage medium for storing computer programs.
  • the computer-readable storage medium may be applied to the terminal device in the embodiments of the present application, and the computer program causes the computer to execute the corresponding process implemented by the terminal device in each method of the embodiments of the present application. No longer.
  • the computer-readable storage medium may be applied to the network device in the embodiments of the present application, and the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiments of the present application. No longer.
  • An embodiment of the present application also provides a computer program product, including computer program instructions.
  • the computer program product can be applied to the terminal device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the terminal device in each method of the embodiment of the present application. Repeat again.
  • the computer program product may be applied to the network device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. Repeat again.
  • An embodiment of the present application also provides a computer program.
  • the computer program can be applied to the terminal device in the embodiments of the present application.
  • the computer program runs on the computer, the computer is allowed to execute the corresponding process implemented by the terminal device in each method of the embodiments of the present application. , Will not repeat them here.
  • the computer program can be applied to the network device in the embodiments of the present application.
  • the computer program runs on the computer, the computer is allowed to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. , Will not repeat them here.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the units is only a division of logical functions.
  • there may be other divisions for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application essentially or part of the contribution to the existing technology or part of the technical solution can be embodied in the form of a software product
  • the computer software product is stored in a storage medium, including Several instructions are used to enable a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

Abstract

La présente invention concerne un procédé et un dispositif de transmission d'informations de système, permettant de réduire le temps nécessaire pour qu'un dispositif terminal reçoive ladite information. Le procédé comprend les étapes suivantes : un dispositif de réseau reçoit un premier message transmis par un dispositif terminal, le premier message étant utilisé pour demander des informations de système; et le dispositif de réseau transmet les informations de système dans une deuxième fenêtre dans la mesure où un deuxième message n'est pas transmis dans une première fenêtre, le deuxième message étant utilisé pour indiquer si le dispositif de réseau a transmis les informations de système, et la deuxième fenêtre survient après la première fenêtre.
PCT/CN2018/113539 2018-11-01 2018-11-01 Procédé et dispositif de transmission d'informations de système WO2020087476A1 (fr)

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CN201880094975.1A CN112352453B (zh) 2018-11-01 2018-11-01 传输系统信息的方法和设备

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