WO2020181943A1 - Procédé et dispositif de demande d'informations de système - Google Patents

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

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Publication number
WO2020181943A1
WO2020181943A1 PCT/CN2020/074749 CN2020074749W WO2020181943A1 WO 2020181943 A1 WO2020181943 A1 WO 2020181943A1 CN 2020074749 W CN2020074749 W CN 2020074749W WO 2020181943 A1 WO2020181943 A1 WO 2020181943A1
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WO
WIPO (PCT)
Prior art keywords
timer
message
terminal device
system information
network device
Prior art date
Application number
PCT/CN2020/074749
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English (en)
Chinese (zh)
Inventor
何青春
常俊仁
谢曦
Original Assignee
华为技术有限公司
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Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2020181943A1 publication Critical patent/WO2020181943A1/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
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0248—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal dependent on the time of the day, e.g. according to expected transmission activity
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]
    • 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

  • This application relates to the field of communication technology, and in particular to a method and device for requesting system information.
  • a new air interface (new radio, NR) system system messages divided into a main system information block (master information block, MIB), the minimum system information remaining (remaining minimum system information, RMSI) and other system information (OSI).
  • RMSI is also system information block 1 (system information block, SIB1).
  • SIB1 system information block 1
  • SIB2 SIB3
  • OSIs OSIs with the same cycle may also be encapsulated into a system information (system information, SI) transmission.
  • SI may be sent through periodic broadcast, or may be sent according to the request of the terminal device. If the SI is sent according to the request of the terminal device, the terminal device can generally send a request to the base station during a random access process, and the base station can send the SI to the terminal device through broadcast or dedicated signaling. For example, the terminal device may request SI from the base station through the first message (Msg1) in the random access process, or may request SI from the base station through the third message (Msg3) in the random access process.
  • Msg1 first message
  • Msg3 third message
  • C-DRX connected-discontinuous reception
  • Msg1 is sent to the base station to request SI from the base station through Msg1.
  • the base station After receiving the Msg1, the base station sends a physical downlink control channel (PDCCH) for scheduling random access response (RAR) to the terminal device. After sending the PDCCH for scheduling the RAR, the base station will send the RAR.
  • PDCCH physical downlink control channel
  • RAR random access response
  • the base station After sending the RAR, the base station will also send the PDCCH for scheduling the SI before sending the SI again, so that the terminal device can obtain the SI.
  • the terminal device if the terminal device receives the PDCCH used to schedule SI, the PDCCH will carry a flipped new data indication (NDI), so the terminal device can start the DRX-inactivity timer (drx-inactivity timer) to Receive SI during the running time of drx-inactivity timer.
  • NDI flipped new data indication
  • the PDCCH used to schedule RAR sent by the base station is used to schedule RAR and is not used to indicate newly transmitted data. Therefore, the PDCCH does not carry NDI, or the carried NDI is not inverted.
  • the terminal device will not start drx-inactivity timer after receiving the PDCCH. Then, since the terminal device has not started the drx-inactivity timer, the current activation period of the C-DRX cycle may end soon, and then the terminal device will enter the dormant state. Then, if the terminal device enters the dormant state before receiving the PDCCH used to schedule the SI, it obviously cannot receive the PDCCH used to schedule the SI, and therefore cannot receive the SI, resulting in the loss of the SI.
  • the embodiments of the present application provide a method and device for requesting system information, which are used to improve the success rate of a terminal device in obtaining SI.
  • a first method for requesting system information includes:
  • Start or restart the first timer to wait for receiving the downlink control channel for scheduling the system information within the running time of the first timer, wherein, during the running time of the first timer, the The terminal device is active.
  • the method may be executed by a first communication device.
  • the first communication device is, for example, a terminal device or a communication device capable of supporting the terminal device to realize the functions required by the method, or for example, a chip that can be set in the terminal device.
  • the second message is RAR
  • the first timer can be started or restarted, so that the terminal device will not sleep during the running time of the first timer .
  • the downlink control channel used for scheduling system information from the network device can be received as much as possible, so as to further receive the system information. In this way, the timing when the terminal device enters the dormant state is controlled, and the success rate of receiving system information is improved.
  • starting or restarting the first timer includes:
  • the first timer can be started or restarted when the second message is received.
  • the first timer can also be started or restarted after the second message is sent, or when the second message is sent. Start or restart the first timer. In this way, the start or restart of the first timer is relatively timely.
  • the first timer can be restarted or restarted at the end of the time window for receiving the second message. It can be understood that no matter where the terminal device receives the second message in the time domain of the receiving time window, the terminal device The first timer can be restarted or restarted at the end of the receiving time window, so that all the timing duration of the first timer can be used to wait for the downlink control channel for scheduling SI, and the utilization of the first timer can be improved , It also improves the reception success rate of the downlink control channel used for scheduling SI.
  • the method further includes:
  • the first timer may not use the existing timers in the prior art, but may be implemented by a new timer. It can be considered that the first timer is a specialized embodiment of the present application.
  • the provided timer is, in other words, a timer dedicated to the technical solution provided in the embodiments of the present application.
  • the timing duration of the first timer may be specified through a protocol, for example; or, the timing duration of the first timer may be pre-configured in the terminal device, for example, may be pre-configured in the terminal device by the network device, or may be pre-configured in the terminal device before leaving the factory. Configured in the terminal device; or, the timing duration of the first timer may also be indicated by the network device.
  • the network device may send a third message to the terminal device, and the third message may indicate the timing duration of the first timer.
  • the timing duration of the first timer can be determined.
  • the function of the first timer is realized by a special timer, which makes the function of the first timer more clear.
  • the first timer is an inactive timer, a downlink retransmission timer, or an uplink retransmission timer in a discontinuous reception mechanism;
  • the inactive timer is used for the terminal device to wait to receive new downlink data from the network device within the running time of the inactive timer
  • the downlink retransmission timer is used for the terminal device to wait for the Waiting to receive downlink retransmission data from the network device within the running time of the downlink retransmission timer
  • the uplink retransmission timer is used by the terminal device to send uplink retransmissions within the running time of the uplink retransmission timer data.
  • the first timer can also be implemented by using an existing timer in the prior art.
  • the first timer may be any one of an inactive timer, a downlink retransmission timer, or an uplink retransmission timer in the C-DRX mechanism.
  • the terminal device is in an active state. Therefore, the embodiment of the present application can use any one of the three timers to make the terminal device be in an active state. Active state, so as to be able to receive the downlink control channel for scheduling SI within the running time of the first timer as much as possible, so as to be able to receive SI.
  • the first timer can directly use an existing timer in the prior art, which is also convenient for making the technical solution of the embodiment of the present application compatible with the existing protocol.
  • the method further includes:
  • the network device During the running time of the inactive timer, receive the system information from the network device according to the scheduling of the downlink control channel.
  • the terminal device Because the terminal device will not sleep during the running time of the first timer, it can receive the downlink control channel used for scheduling system information from the network device, thereby further receiving system information, and improving the success rate of obtaining system information.
  • receiving the system information from the network device includes:
  • the dedicated message carrying the system information.
  • the SI when the network device sends the SI, the SI may be carried in a dedicated message for sending.
  • the dedicated message may be a message dedicated to sending the SI under the protection of the embodiment of the present application.
  • the dedicated message is an RRC message, or may also be another type of message.
  • the system information is sent through a dedicated message, so that the system information does not need to be mixed with other information to be sent, which helps to improve the transmission success rate of the system information, and also helps improve the decoding success rate of the system information by the terminal device.
  • the network device may also send the SI through an existing message.
  • the network device may carry the SI in the RRC connection reconfiguration message and send it, or may also carry the SI in other messages and send it.
  • Existing messages can be reused when sending SI, which not only achieves the purpose of sending SI, but also saves transmission resources, and also makes the solution provided by the embodiments of the present application easier to be compatible with existing protocols.
  • determining that the second message is a response message of the first message includes:
  • the terminal device can determine that the second message is for responding to the first message according to the second message containing only RAPID.
  • the method further includes:
  • the fourth message is used to indicate that the terminal device is allowed to obtain system information during the inactive period of the discontinuous reception mechanism.
  • the permission for the terminal device may be instructed in advance by the network device.
  • the network device may send a fourth message to the terminal device.
  • the fourth message is used to indicate that the terminal device is allowed to be in C-
  • the SI is acquired during the inactive period of the DRX mechanism.
  • the terminal device receives the fourth message from the network device, it can be determined that the SI can be acquired during the inactive period of the C-DRX mechanism.
  • the network device can instruct the terminal device in need to obtain the SI during the inactive period of the C-DRX mechanism, while for other terminal devices, it is not necessary to obtain the SI during the inactive period of the C-DRX mechanism. In order to save the power consumption of the terminal equipment.
  • the network device can instruct the terminal device to obtain SI during the inactive period of the C-DRX mechanism, it can also indicate that the terminal device cannot obtain the SI during the inactive period of the C-DRX mechanism. -To obtain SI during the inactive period of the DRX mechanism, the network device can again indicate that it cannot obtain SI during the inactive period of the C-DRX mechanism, so that these terminal devices may not be in the non-active period of the C-DRX mechanism after obtaining the SI. Obtain SI during the activation period to save power consumption of the terminal device.
  • a second method for requesting system information includes:
  • the method may be executed by a second communication device.
  • the second communication device is, for example, a network device or a communication device capable of supporting the network device to implement functions required by the method, or for example, a chip that can be set in the network device.
  • the network device is, for example, a base station.
  • starting or restarting the first timer includes:
  • the method further includes:
  • the first timer is an inactive timer, a downlink retransmission timer, or an uplink retransmission timer in a discontinuous reception mechanism;
  • the inactive timer is used for the network device to send new downlink data within the running time of the inactive timer
  • the downlink retransmission timer is used for the network device to run the downlink retransmission timer
  • the downlink retransmission data is sent within the time
  • the uplink retransmission timer is used for the network device to wait to receive the uplink retransmission data from the terminal device within the running time of the uplink retransmission timer.
  • the method further includes:
  • sending the system information to the terminal device includes:
  • the second message is a response message of the first message, and includes:
  • the second message only contains RAPID.
  • the method further includes:
  • a fourth message is sent to the terminal device, where the fourth message is used to indicate that the terminal device is allowed to obtain system information during the inactive period of the discontinuous reception mechanism.
  • a first communication device is provided, for example, the communication device is the first communication device as described above.
  • the communication device is configured to execute the foregoing first aspect or the method in any possible implementation manner of the first aspect.
  • the communication device may include a module for executing the method in the first aspect or any possible implementation of the first aspect, for example, including a processing module and a transceiver module that are coupled to each other.
  • the communication device is a communication device.
  • the communication device is a terminal device. among them,
  • the transceiver module is configured to send a first message for requesting system information to a network device
  • the transceiver module is further configured to receive a second message from the network device, and determine that the second message is a response message of the first message;
  • the processing module is configured to start or restart a first timer, so as to wait to receive the downlink control channel for scheduling the system information within the running time of the first timer, wherein the first timer During the running time, the communication device is in an active state.
  • the processing module is configured to start or restart the first timer in the following manner:
  • the processing module is further configured to obtain the pre-configured timing duration of the first timer; or,
  • the transceiver module is further configured to receive a third message from the network device, where the third message is used to indicate the timing duration of the first timer.
  • the first timer is an inactive timer, a downlink retransmission timer, or an uplink retransmission timer in a discontinuous reception mechanism;
  • the inactive timer is used for the communication device to wait to receive new downlink data from the network device within the running time of the inactive timer
  • the downlink retransmission timer is used for the communication device to wait for the Waiting to receive downlink retransmission data from the network device within the running time of the downlink retransmission timer
  • the uplink retransmission timer is used by the communication device to send uplink retransmissions within the running time of the uplink retransmission timer data.
  • the transceiver module is further configured to receive the downlink control channel used to schedule the system information from the network device;
  • the processing module is further configured to start or restart an inactivation timer, wherein the communication device is in an active state during the running time of the inactivation timer;
  • the transceiver module is further configured to receive the system information from the network device according to the scheduling of the downlink control channel during the running time of the inactive timer.
  • the transceiver module is configured to receive the system information from the network device in the following manner:
  • the dedicated message carrying the system information.
  • the processing module is configured to determine that the second message is a response message of the first message in the following manner:
  • the transceiver module is further configured to receive a fourth message from the network device
  • the processing module is further configured to determine that the fourth message is used to indicate that the communication device is allowed to obtain system information during the inactive period of the discontinuous reception mechanism.
  • a second communication device is provided.
  • the communication device is, for example, the second communication device as described above.
  • the communication device is configured to execute the foregoing second aspect or any possible implementation of the second aspect.
  • the communication device may include a module for executing the second aspect or the method in any possible implementation of the second aspect, for example, includes a processing module and a transceiver module that are coupled with each other.
  • the communication device is a communication device.
  • the communication device is a network device. among them,
  • the transceiver module is configured to receive a first message for requesting system information from a terminal device
  • the transceiver module is configured to send a second message to the terminal device, where the second message is a response message to the first message;
  • the processing module is configured to start or restart a first timer, so as to send a downlink control channel for scheduling the system information within the running time of the first timer.
  • the processing module is configured to start or restart the first timer in the following manner:
  • the transceiver module is further configured to send a third message to the terminal device, and the third message is used to indicate the first timer The timing duration.
  • the first timer is an inactive timer, a downlink retransmission timer, or an uplink retransmission timer in a discontinuous reception mechanism;
  • the inactive timer is used for the communication device to send new downlink data within the running time of the inactive timer
  • the downlink retransmission timer is used for the communication device to run the downlink retransmission timer
  • the downlink retransmission data is sent within the time period
  • the uplink retransmission timer is used for the communication device to wait to receive the uplink retransmission data from the terminal device within the running time of the uplink retransmission timer.
  • the transceiver module is further configured to send the downlink control channel for scheduling the system information to the terminal device;
  • the processing module is also used to start or restart an inactive timer
  • the transceiver module is further configured to send the system information to the terminal device according to the scheduling of the downlink control channel during the running time of the inactive timer.
  • the transceiver module is configured to send the system information to the terminal device in the following manner:
  • the second message is a response message of the first message, and includes:
  • the second message only contains RAPID.
  • the transceiver module is further configured to send a fourth message to the terminal device, where the fourth message is used to indicate that the terminal device is allowed to Obtain system information during the inactive period of the discontinuous reception mechanism.
  • a third communication device is provided.
  • the communication device is, for example, the first communication device as described above.
  • the communication device includes a processor and a transceiver, and is used to implement the foregoing first aspect or the methods described in various possible designs of the first aspect.
  • the communication device is a chip provided in a communication device.
  • the communication device is a terminal device.
  • the transceiver is realized by, for example, an antenna, a feeder, a codec in the communication device, or, if the communication device is a chip set in the communication device, the transceiver is, for example, a communication interface in the chip. It is connected with the radio frequency transceiving component in the communication equipment to realize the transmission and reception of information through the radio frequency transceiving component.
  • a fourth communication device is provided.
  • the communication device is, for example, the second communication device as described above.
  • the communication device includes a processor and a transceiver, and is used to implement the method described in the second aspect or various possible designs of the second aspect.
  • the communication device is a chip provided in a communication device.
  • the communication device is a terminal device.
  • the transceiver is realized by, for example, an antenna and a codec in a communication device, or, if the communication device is a chip set in the communication device, the transceiver is, for example, a communication interface in the chip.
  • the radio frequency transceiving component in the device is connected to realize the information transmission and reception through the radio frequency transceiving component.
  • a fifth communication device is provided.
  • the communication device may be the first communication device in the above method design.
  • the communication device is a chip provided in a terminal device.
  • the communication device includes: a memory for storing computer executable program codes; and a processor, which is coupled with the memory.
  • the program code stored in the memory includes instructions, and when the processor executes the instructions, the fifth communication device is caused to execute the foregoing first aspect or the method in any one of the possible implementation manners of the first aspect.
  • the fifth type of communication device may also include a communication interface, and the communication interface may be a transceiver in a terminal device, for example, implemented by the antenna, feeder, and codec in the communication device, or if the fifth type of communication
  • the device is a chip set in a terminal device, and the communication interface may be an input/output interface of the chip, such as input/output pins.
  • a sixth communication device is provided.
  • the communication device may be the second communication device in the above method design.
  • the communication device is a chip set in a network device.
  • the communication device includes: a memory for storing computer executable program codes; and a processor, which is coupled with the memory.
  • the program code stored in the memory includes instructions, and when the processor executes the instructions, the fifth communication device is caused to execute the foregoing second aspect or the method in any one of the possible implementation manners of the second aspect.
  • the sixth communication device may also include a communication interface, and the communication interface may be a transceiver in a network device, for example, implemented by the antenna, feeder, and codec in the communication device, or if the sixth communication
  • the device is a chip set in a network device, and the communication interface may be an input/output interface of the chip, such as input/output pins.
  • a communication system which may include the first communication device described in the third aspect, the third communication device described in the fifth aspect, or the fifth communication device described in the seventh aspect , And including the second communication device described in the fourth aspect, the fourth communication device described in the sixth aspect, or the sixth communication device described in the eighth aspect.
  • a computer storage medium stores instructions, which when run on a computer, cause the computer to execute the first aspect or any one of the possible designs of the first aspect The method described.
  • a computer storage medium stores instructions that, when run on a computer, cause the computer to execute the second aspect or any one of the possible designs of the second aspect. The method described in.
  • a computer program product containing instructions.
  • the computer program product stores instructions that, when run on a computer, cause the computer to execute the first aspect or any one of the first aspects described above. The method described in the design.
  • a computer program product containing instructions.
  • the computer program product stores instructions that, when run on a computer, cause the computer to execute the second aspect or any one of the possibilities of the second aspect. The method described in the design.
  • the terminal device will not sleep during the running time of the first timer, so as to ensure that it can receive the downlink control channel for scheduling system information from the network device as much as possible, so as to further receive the system information. In this way, the timing when the terminal device enters the dormant state is controlled, and the success rate of receiving system information is improved.
  • FIG. 1 is a schematic diagram of an application scenario of an embodiment of the application
  • FIG. 2 is a schematic diagram of another application scenario of an embodiment of the application.
  • FIG. 3 is a flowchart of a method for requesting system information according to an embodiment of the application
  • FIG. 4 is a schematic diagram of the process of requesting SI in the first implementation manner of the first timer provided by the embodiment of the present application;
  • FIG. 5 is a schematic diagram of the process of requesting SI in the second implementation manner of the first timer provided by the embodiment of the present application;
  • FIG. 6 is a schematic block diagram of a communication device capable of realizing the functions of a terminal device according to an embodiment of the application;
  • FIG. 7 is another schematic block diagram of a communication device capable of realizing the functions of a terminal device according to an embodiment of the application.
  • FIG. 8 is a schematic block diagram of a communication device capable of realizing the functions of a network device according to an embodiment of the application;
  • FIG. 9 is another schematic block diagram of a communication device capable of realizing the function of a network device according to an embodiment of the application.
  • FIG. 10 is a schematic block diagram of a communication device provided by an embodiment of the application.
  • FIG. 11 is another schematic block diagram of a communication device provided by an embodiment of this application.
  • FIG. 12 is still another schematic block diagram of the communication device provided by an embodiment of the application.
  • Terminal devices including devices that provide users with voice and/or data connectivity, such as handheld devices with wireless connection functions, or processing devices connected to wireless modems.
  • the terminal device can communicate with the core network via a radio access network (RAN), and exchange voice and/or data with the RAN.
  • RAN radio access network
  • the terminal equipment may include user equipment (UE), wireless terminal equipment, mobile terminal equipment, device-to-device communication (device-to-device, D2D) terminal equipment, V2X terminal equipment, machine-to-machine/machine-type communication ( machine-to-machine/machine-type communications, M2M/MTC) terminal equipment, Internet of things (IoT) terminal equipment, subscriber unit (subscriber unit), subscriber station (subscriber station), mobile station (mobile station) , Remote station (remote station), access point (access point, AP), remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal), user agent (user agent), or user equipment (user device) etc.
  • IoT Internet of things
  • it may include mobile phones (or “cellular” phones), computers with mobile terminal equipment, portable, pocket-sized, handheld, and computer-built mobile devices.
  • PCS personal communication service
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • restricted devices such as devices with low power consumption, or devices with limited storage capabilities, or devices with limited computing capabilities. Examples include barcodes, radio frequency identification (RFID), sensors, global positioning system (GPS), laser scanners and other information sensing equipment.
  • RFID radio frequency identification
  • GPS global positioning system
  • laser scanners and other information sensing equipment.
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices or smart wearable devices, etc. It is a general term for using wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes Wait.
  • a wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. Wearable devices are not only a hardware device, but also realize powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-sized, complete or partial functions that can be achieved without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, and need to cooperate with other devices such as smart phones.
  • Use such as various smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.
  • vehicle-mounted terminal equipment for example, the vehicle-mounted terminal equipment is also called on-board unit (OBU).
  • OBU on-board unit
  • the terminal device may also include a relay. Or it can be understood that everything that can communicate with the base station can be regarded as terminal equipment.
  • Network equipment such as access network (AN) equipment, such as a base station (e.g., access point), may refer to equipment that communicates with wireless terminal equipment through one or more cells on the air interface in the access network
  • AN access network
  • base station e.g., access point
  • the base station can be used to convert the received air frame and Internet Protocol (IP) packets to each other, as a router between the terminal device and the rest of the access network, where the rest of the access network may include an IP network.
  • IP Internet Protocol
  • the RSU can be a fixed infrastructure entity that supports V2X applications, and can exchange messages with other entities that support V2X applications.
  • the network equipment can also coordinate the attribute management of the air interface.
  • the network equipment may include a long term evolution (LTE) system or an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in a long term evolution (advanced, LTE-A) system, Or it may also include the next generation node B (gNB) in the 5G NR system (also referred to as the NR system), or it may also include the centralized type in the cloud radio access network (Cloud RAN) system.
  • LTE long term evolution
  • NodeB or eNB or e-NodeB, evolutional Node B evolutional Node B
  • LTE-A long term evolution
  • gNB next generation node B
  • 5G NR system also referred to as the NR system
  • Cloud RAN cloud radio access network
  • a unit (centralized unit, CU) and a distributed unit (distributed unit, DU) are not limited in the embodiment of the present application.
  • DRX Under the DRX mechanism, the terminal device will stop monitoring the PDCCH during the sleep time.
  • DRX is divided into two types: idle DRX and C-DRX.
  • Idle DRX that is, the discontinuous reception when the terminal device is in the idle state.
  • RRC radio resource control
  • the terminal equipment mainly monitors paging messages. As long as the period of the paging message is well defined, the purpose of discontinuous reception can be achieved.
  • the terminal device monitors user data, it will leave the idle state, for example, enter the connected state from the idle state first.
  • C-DRX that is, DRX when the terminal device is in the RRC connected state.
  • the terminal device will periodically blindly detect the candidate PDCCH. If the PDCCH is not detected within a period of time, the terminal device will enter the OFF state from the active state, and the terminal device will stop detecting the PDCCH in the OFF state.
  • the OFF state can also be called a sleep state or a dormant state
  • the activated state can also be called an activated state.
  • timers are involved, such as drx-on duration timer, drx-inactivity timer, drx-hybrid automatic repeat request (HARQ) round trip delay (round-trip time, RTT) timer downlink (DL), drx-HARQ RTT timer uplink (UL), drx-retransmission (retransmission) timerDL or drx-retransmission timerUL, etc.
  • drx-on duration timer drx-inactivity timer
  • HARQ drx-hybrid automatic repeat request
  • RTT round trip delay
  • DL downlink
  • UL drx-HARQ RTT timer uplink
  • retransmission retransmission timerDL or drx-retransmission timerUL, etc.
  • 1drx-on duration timer used to indicate the number of consecutive time units after the terminal device enters the DRX cycle.
  • the terminal device monitors the PDCCH during this time.
  • 2 drx-inactivity timer used to indicate the number of consecutive time units after the PDCCH indicates data transmission, or it can be understood as the time for the terminal device to detect the downlink control channel after detecting the downlink control channel indicating data transmission. It can be understood as indicating the number of time units of continuous downlink control channels after the terminal device detects the downlink control channel indicating data transmission, or it can be understood as indicating that the terminal device detects the downlink control information indicating data transmission (downlink control information). information, DCI), the terminal equipment detects the time of the control channel.
  • DCI downlink control information
  • the terminal device detects a PDCCH, and the detected PDCCH is used to indicate new transmission of data (it can be understood that the detected PDCCH carries a flipped NDI), the terminal device The drx-inactivity timer will be started. The terminal device can continue to monitor the PDCCH during the running time of the drx-inactivity timer.
  • the network device can send new downlink data to the terminal device during the running time of the drx-inactivity timer, and the terminal device can also receive new downlink data from the network device during the running time of the drx-inactivity timer.
  • 3drx-HARQ RTT timerDL used to indicate the minimum time that the terminal device hopes to receive the downlink assignment retransmission, or in other words, to indicate the minimum number of consecutive time units before the downlink retransmission reception, which can also be understood as the minimum
  • the retransmission scheduling interval is used to indicate the earliest time unit after which the next downlink data transmission occurs.
  • the terminal device is in a sleep state. It can be understood that the terminal device does not monitor the PDCCH during the running of the timer. Among them, the terminal device starts the timer after receiving the downlink assignment retransmission.
  • the downlink assignment retransmission may refer to the PDCCH used to schedule downlink retransmission data.
  • 4drx-HARQ RTT timerUL used to indicate the minimum number of consecutive time units before uplink retransmission, which can also be understood as the minimum retransmission scheduling interval, that is, used to indicate the earliest time unit after which the next uplink data is sent appear.
  • the terminal device is in a sleep state. It can be understood that during the running of the timer, the terminal device will not send uplink data, and the network device will not receive uplink data. Among them, the terminal device starts the timer after receiving the uplink scheduling.
  • Uplink scheduling may refer to the PDCCH used to schedule uplink retransmission data.
  • 5 drx-retransmission timerDL is used to indicate the time for the terminal device to detect the control channel before receiving the downlink retransmission data, or in other words, to indicate the number of time units of the continuous control channel before receiving the downlink retransmission data.
  • the drx-retransmission timerDL can be activated.
  • the terminal device is in the active state. It can be understood that during the running time of the timer, the terminal device needs to monitor the PDCCH.
  • the network device can send downlink retransmission data to the terminal device, and the terminal device can also receive the downlink retransmission data from the network device.
  • 6drx-retransmission timerUL used to indicate the time for the network device to receive data before receiving the uplink retransmission data, or in other words, to indicate the number of continuous control channel time units before receiving the uplink retransmission data.
  • drx-HARQ RTT timerUL expires, drx-retransmission timerUL can be started.
  • the terminal device is in the active state. It can be understood that the terminal device needs to monitor the PDCCH during the running time of drx-retransmission timerUL.
  • the terminal device can send uplink retransmission data, and the network device can also receive the uplink retransmission data from the terminal device during the running time of drx-retransmission timerUL.
  • timers for example, drx-on duration timer, drx-inactivity timer, drx-retransmission timerDL, or drx-retransmission timerUL, are names used in the LTE system.
  • drx-on duration timer for example, drx-inactivity timer, drx-retransmission timerDL, or drx-retransmission timerUL
  • other names may also be used, and there may be corresponding changes in function.
  • the embodiments of the present application do not limit this.
  • the inactivity timer described herein is, for example, drx-inactivity timer; the downlink retransmission timer is, for example, drx-retransmission timerDL; and the uplink retransmission timer is, for example, drx-retransmission timerUL.
  • Downlink control channel such as PDCCH, or enhanced physical downlink control channel (EPDCCH), narrowband physical downlink control channel (NPDCCH), or other downlink control channels channel.
  • PDCCH physical downlink control channel
  • EPDCCH enhanced physical downlink control channel
  • NPDCCH narrowband physical downlink control channel
  • first and second are used to distinguish multiple objects, and are not used to limit the order, timing, priority, or order of multiple objects. Importance.
  • the first synchronization signal and the second synchronization signal are only for distinguishing different synchronization signals, but do not indicate the difference in content, priority, transmission order, or importance of the two synchronization signals.
  • On-demand SI refers to sending on-demand. For example, in the case where the terminal device needs to obtain SI and the system information broadcast state configured by the base station for the terminal device is "not broadcast", the terminal device can initiate an SI acquisition request to the base station, and the base station can obtain SI according to the SI acquisition request initiated by the terminal device, and then The SI is sent to the terminal equipment through broadcast or dedicated signaling.
  • BWP bandwidth part
  • the base station is on each carrier or serving cell. Up to 4 activated BWPs can be configured for the terminal device. According to the conclusion of the current agreement, it is not necessary to configure the SI public search space for each activated BWP, and only when the SI public search space is configured, the base station will periodically broadcast the SI in the SI public search space. Then for a terminal device, if the active BWP where the terminal device is located is not configured with the SI common search space, the terminal device cannot obtain the SI periodically sent by the base station, but can only obtain the SI in an on-demand manner.
  • the system information broadcast state is pre-configured by the base station for the terminal device. If the system information broadcast state is "not broadcast”, it means that the base station will not broadcast SI periodically, so the terminal device needs to actively obtain it.
  • the terminal device can generally send a request to the base station during the random access process.
  • the terminal device may request SI from the base station through Msg1 in the random access process, or may request SI from the base station through Msg3 in the random access process, and the base station may send SI to the terminal device through broadcast or dedicated signaling.
  • Msg1 Msg1 based
  • Msg3 Msg3 based
  • the terminal device can request SI from the base station through the PRACH resource configured by the base station, that is, the terminal device
  • the Msg1 based method can be used to obtain SI.
  • the PRACH resource includes, for example, a random access preamble (preamble), and may also include other resources.
  • the base station is configured with PRACH resources dedicated to requesting SI, which can be understood as configuring the mapping relationship between PRACH resources and SI.
  • the terminal device sends Msg1 once, and can request only one SI or multiple SIs.
  • PRACH resource 1 corresponds to SI#1
  • PRACH resource 2 corresponds to SI#2 and SI#3. Then, if the terminal device uses PRACH resource 1 when sending Msg1, it indicates that the terminal device requests SI#1, and if the terminal device uses PRACH resource 2 when sending Msg1, it indicates that the terminal device requests SI #2 and SI#3.
  • the terminal device sends the SI acquisition request to the base station through Msg1 (it can be understood as sending Msg1 to the base station through the PRACH resource dedicated to requesting SI), and the base station sends the request to the terminal device through the second message (Msg2) in the random access process. Response message.
  • Msg2 used to respond to the request for the SI generally only contains a random access preamble identifier (RAPID).
  • RAPID random access preamble identifier
  • Msg1 can be preamble
  • Msg2 can be RAR.
  • the terminal device can request SI through Msg3. For example, if the base station configures a PRACH resource dedicated to requesting SI for the terminal device, it can notify the terminal device through SIB1. Then, if the terminal device does not obtain the information of the PRACH resource dedicated to requesting SI configured by the base station in the received SIB1, it can be determined to request SI through Msg3.
  • Msg4 may be a contention resolution message.
  • the base station After sending the RAR, the base station will also send the PDCCH for scheduling the SI before sending the SI again, so that the terminal device can obtain the SI.
  • the terminal device receives the PDCCH for scheduling the SI
  • the terminal receives the SI sent by dedicated signaling at the corresponding time-frequency resource location according to the PDCCH.
  • the PDCCH used to schedule RAR sent by the base station is used to schedule RAR and is not used to indicate newly transmitted data, so the PDCCH does not carry NDI. Then, the terminal device will not start drx-inactivity timer after receiving the PDCCH.
  • the terminal device since the terminal device has not started the drx-inactivity timer, the current activation period of the C-DRX cycle may end soon, and then the terminal device will enter the dormant state. Then, if the terminal device enters the dormant state before receiving the PDCCH used to schedule the SI, it obviously cannot receive the PDCCH used to schedule the SI, and therefore cannot receive the SI, resulting in the loss of the SI.
  • the second message is RAR
  • the terminal device after receiving the second message from the network device, the terminal device can start or restart the first timer, so that the terminal device does not stop during the running time of the first timer. It will sleep to ensure that it can receive the downlink control channel for scheduling system information from the network device as much as possible, so as to further receive the system information. In this way, the timing when the terminal device enters the dormant state is controlled, and the success rate of receiving system information is improved.
  • E-UTRAN evolved universal mobile telecommunications system terrestrial radio access network
  • NG next generation
  • the embodiments of this application can be applied to next-generation communication systems or similar communication systems.
  • FIG. 1 is an application scenario of an embodiment of the present application, or a network architecture applied by the embodiment of the present application, and the network architecture is, for example, a network architecture of the E-UTRAN system.
  • E-UTRAN is composed of eNBs and provides E-UTRA user plane and control plane protocols for terminal equipment.
  • the eNBs are interconnected through the X2 interface.
  • the eNB is also connected to a mobility management entity (MME) through an S1-MME interface, and connected to a service gateway (S-GW) through an S1-U interface.
  • MME mobility management entity
  • S-GW service gateway
  • FIG. 1 three eNBs are taken as an example, and the eNBs are represented as network devices in FIG.
  • each eNB in Figure 1 may serve one or more terminal equipment.
  • the technical solutions provided in the embodiments of this application can be used to serve terminal equipment through terminal equipment and eNB executes.
  • FIG. 2 is another application scenario of this embodiment of the present application, or another network architecture applied by the embodiment of this application.
  • the network architecture is, for example, a network architecture of an NG-RAN system.
  • gNB provides NR user plane and control plane protocols for terminal equipment, and gNB is connected to the core network of the 5G system
  • ng-eNB provides E-UTRA user plane and control plane protocols for terminal equipment
  • ng-eNB It is also connected to the core network of the 5G system.
  • the gNB and ng-eNB are interconnected through the Xn interface, and both gNB and ng-eNB are connected to the access and mobility management function (AMF) in the 5G core network (5GC) through the NG interface.
  • AMF access and mobility management function
  • UPF User plane function
  • the fourth network device and the fifth network device are both gNB, and the sixth network device and the seventh network device are both ng-eNB.
  • the terminal device is also not shown in Figure 2.
  • each gNB or ng-gNB in Figure 2 may serve one or more terminal devices.
  • the technical solutions provided in the embodiments of this application can be used through terminal devices and The gNB serving the terminal device is executed, or it can also be executed by the terminal device and the ng-eNB serving the terminal device.
  • the fourth network device, the sixth network device, and the seventh network device may all be gNBs.
  • gNB provides NR user plane and control plane protocols for terminal equipment, and gNB is connected to the core network of the 5G system.
  • the gNB and gNB are interconnected through the Xn interface, and the gNB is connected to the AMF/UPF in the 5G core network through the NG interface.
  • the terminal device is also not shown in Figure 2.
  • each gNB in Figure 2 may serve one or more terminal devices.
  • the technical solution provided by the embodiment of this application can serve the terminal device through the terminal device and GNB implementation.
  • the embodiment of the present application provides a method for requesting system information. Please refer to FIG. 3, which is a flowchart of the method. This method can be applied to the scenario shown in FIG. 1 or FIG. 2.
  • the method provided in the embodiment of the present application is applied to the application scenario shown in FIG. 1 or FIG. 2 as an example.
  • the method can be executed by two communication devices, such as a first communication device and a second communication device, where the first communication device can be a network device or can support the network device to implement the functions required by the method.
  • the communication device or the first communication device may be a terminal device or a communication device capable of supporting the terminal device to implement the functions required by the method, and of course it may also be other communication devices, such as a chip system.
  • the second communication device may be a network device or a communication device capable of supporting the functions required by the network device to implement the method, or the second communication device may be a terminal device or capable of supporting the terminal device to implement the method.
  • the communication device with the required functions can of course also be other communication devices, such as a chip system.
  • the first communication device may be a network device
  • the second communication device is a terminal device
  • both the first communication device and the second communication device are network devices.
  • the device, or the first communication device and the second communication device are both terminal devices, or the first communication device is a network device, and the second communication device is a communication device capable of supporting the terminal device to implement the functions required by the method, and so on.
  • the network equipment is, for example, a base station.
  • the method is executed by the network device and the terminal device as an example, that is, the first communication device is the network device and the second communication device is the terminal device as an example.
  • the network device described below may be any one of the first network device, the second network device, or the third network device in FIG. 1.
  • Network equipment if the method provided in the embodiments of this application is applied to the application scenario shown in Figure 2, the network equipment described below may be the fourth network equipment, the fifth network equipment, or the sixth network equipment in Figure 2 Any one of the seventh network devices.
  • the terminal device sends a first message for requesting system information to the network device, and the network device receives the first message for requesting system information from the terminal device.
  • system information is also referred to as SI.
  • the terminal device may send a first message to the network device to obtain the SI.
  • the network equipment can configure at most 4 activated BWPs for the terminal equipment on each carrier or serving cell.
  • the activated BWP where the terminal device is located is not configured with the SI public search space, the terminal device cannot obtain the SI periodically sent by the network device, but can only obtain the SI in an on-demand manner, so the terminal device can send the first A message.
  • the first message is, for example, Msg1 in the random access process, that is, the terminal device can obtain the SI in an Msg1 based manner.
  • the mechanism adopted in the embodiment of the present application is that the terminal device requests SI from the base station through Msg1 in the random access process, and the base station sends the SI to the terminal device through dedicated signaling.
  • the network device is configured with PRACH resources dedicated to requesting SI, which can be understood as configuring the mapping relationship between PRACH resources and SI.
  • the PRACH resource includes, for example, a preamble, and may also include other resources.
  • the terminal device sends Msg1 once, and can request only one SI or multiple SIs.
  • PRACH resource 1 corresponds to SI#1
  • PRACH resource 2 corresponds to SI#2 and SI#3. Then, if the terminal device uses PRACH resource 1 when sending Msg1, it indicates that the terminal device requests SI#1, and if the terminal device uses PRACH resource 2 when sending Msg1, it indicates that the terminal device requests SI #2 and SI#3.
  • the terminal device only needs to select the corresponding PRACH resource according to the SI to be requested.
  • the network device sends a second message to the terminal device, and the terminal device receives the second message from the network device, where the second message is a response message to the first message.
  • the first message is, for example, Msg1 in a random access process
  • the second message is a response message of the first message, for example, Msg2 in a random access process.
  • the terminal device sends the first message to the network device through Msg1 (for example, the terminal device sends Msg1 to the network device through a PRACH resource dedicated to request SI), and the network device sends a response to Msg1 to the terminal device through Msg2.
  • Msg2 in response to Msg1 for requesting SI generally only contains RAPID, and if Msg2 contains other information besides RAPID, it indicates that Msg2 is not Msg2 in response to Msg1 for requesting SI. Therefore, after the terminal device receives Msg2, if it determines that Msg2 only contains RAPID, it can determine that Msg2 is Msg2 that responds to Msg1 used to request SI.
  • the terminal device starts or restarts the first timer to wait for receiving the downlink control channel for scheduling the system information within the running time of the first timer, wherein, during the running time of the first timer Inside, the terminal device is active.
  • the network device also starts or restarts the first timer to send the downlink control channel used for scheduling the system information within the running time of the first timer.
  • the terminal device may start the first timer, and if the first timer has been started and has not timed out, the terminal device may restart the first timer. The same is true for network equipment.
  • the occurrence time of the two may be the same or different, and there is no specific limitation.
  • the terminal device after receiving the Msg2 from the network device, the terminal device can start or restart the first timer, so that the terminal device will not sleep during the running time of the first timer, so as to ensure that it can receive the Msg2 from the network as much as possible.
  • the device's downlink control channel used to schedule SI to further receive SI. In this way, the timing when the terminal device enters the dormant state is controlled, and the success rate of SI reception is improved.
  • the first timer can be started or restarted when the second message is received.
  • the first timer can also be started or restarted after the second message is sent, or the first timer can be started or restarted when the second message is sent. Start or restart the first timer when the second message occurs. In this way, the start or restart of the first timer is relatively timely.
  • the time window may also be referred to as a receiving time window, for example.
  • the time when the terminal device receives the second message may be the start time of the reception time window, or the end time of the reception time window, or other time between the start time and the end time of the reception time window.
  • the time when the terminal device receives the second message is not the end time of the receiving time window. If the terminal device starts or restarts the first timer when receiving the second message, then the partial running time of the first timer is the same as the receiving time. The remaining time of the window coincides, and the receiving time window is used to receive the second message.
  • the network device will not send the downlink control channel for scheduling SI, and the terminal device will naturally not be in the receiving time window. Receive the downlink control channel used for scheduling SI. Therefore, if part of the running time of the first timer coincides with the remaining time of the receiving time window, it is a waste of the timing of the first timer. It is also possible that this part of the time is wasted, resulting in the remaining time of the first timer. The timing duration of is not long enough to wait until the downlink control channel for scheduling SI is received.
  • the terminal device can restart or restart the first timer at the end of the time window for receiving the second message (that is, the receiving time window), which can be understood as whether the terminal device is at the receiving time In which time domain position of the window to receive the second message, the terminal device can restart or restart the first timer at the end of the receiving time window, so that all the timing duration of the first timer can be used to wait for the scheduling of SI
  • the downlink control channel improves the utilization of the first timer and also improves the reception success rate of the downlink control channel used for scheduling SI.
  • the network device there may be a prescribed time window for sending the second message, and the network device may send the second message within the time window, and the time window may also be called a sending time window, for example.
  • the time when the network device sends the second message may be the start time of the sending time window, or the end time of the sending time window, or other time between the sending time window from the start time to the end time.
  • the network device can restart or restart the first timer at the end of the time window for sending the second message (that is, the sending time window).
  • the network device also starts or restarts the first timer after sending the second message; or, if the terminal device is used to receive the first timer If the first timer is restarted or restarted at the end of the time window of the second message (that is, the receiving time window), the network device is also restarted at the end of the time window for sending the second message (that is, the sending time window) Or restart the first timer. In this way, the maintenance of the first timer by the terminal device and the network device can be kept as consistent as possible.
  • the embodiments of the present application support different implementation manners, which are introduced as follows.
  • the first timer may not use the existing timers in the prior art, but may be implemented by a new timer. It can be considered that the first timer is a specialized embodiment of the present application.
  • the provided timer is, in other words, a timer dedicated to the technical solution provided in the embodiments of the present application.
  • the timing duration of the first timer may be specified through a protocol, for example; or, the timing duration of the first timer may be pre-configured in the terminal device, for example, may be pre-configured in the terminal device by the network device, or may be pre-configured in the terminal device before leaving the factory. Configured in the terminal device; or, the timing duration of the first timer may also be indicated by the network device.
  • the network device may send a third message to the terminal device, and the third message may indicate the timing duration of the first timer. After receiving the third message, the timing duration of the first timer can be determined.
  • FIG. 4 is a schematic diagram of requesting SI in the first implementation of the first timer.
  • the terminal device is in the onduration period of the C-DRX cycle.
  • the terminal device can send Msg1 for requesting SI.
  • the network device receives Msg1 for requesting SI , Send the PDCCH for scheduling the RAR to the terminal device, and then the network device sends the RAR to the terminal device, and the terminal device obtains the RAR according to the scheduling of the PDCCH for scheduling the RAR.
  • Msg1 for requesting SI
  • the terminal device does not start the first timer before receiving the RAR, the terminal device can start the first timer after receiving the RAR, and the terminal device is in the operating time of the first timer.
  • the timing duration of the first timer is, for example, pre-indicated by the network device through the third message.
  • the network device also maintains the first timer.
  • the network device can send the PDCCH for scheduling SI within the running time of the first timer, and the terminal device can receive the SI for scheduling within the running time of the first timer.
  • PDCCH may be scrambled by, for example, a cell radio network temporary identifier (C-RNTI).
  • C-RNTI cell radio network temporary identifier
  • the terminal device may start the inactive timer to receive the SI within the running time of the inactive timer. Therefore, the terminal device can be considered to be in an active state from receiving RAR until receiving SI, as shown in Figure 4.
  • the terminal device may stop the first timer, or may not stop the first timer, but let the first timer continue to run Until the first timer expires.
  • the terminal device is in the active state after starting or restarting the first timer.
  • the power consumption can be less than the power consumption of the terminal device during the on-duration period to minimize the terminal device’s power consumption.
  • the power consumption may also be equal to the power consumption of the terminal device in the onduration time period, which is not specifically limited.
  • the first timer can also be implemented by using an existing timer in the prior art.
  • the first timer may be any one of an inactive timer, a downlink retransmission timer, or an uplink retransmission timer in the C-DRX mechanism.
  • the inactivity timer is, for example, drx-inactivity timer
  • the downlink retransmission timer is, for example, drx-retransmission timerDL
  • the uplink retransmission timer is, for example, drx-retransmission timerUL.
  • the embodiment of the present application can use any one of the three timers to make the terminal device in an active state, so as to be able to receive the downlink control channel for scheduling SI within the running time of the first timer. , So as to be able to receive SI.
  • the first timer can directly use an existing timer in the prior art, which is also convenient for making the technical solution of the embodiment of the present application compatible with the existing protocol.
  • the inactive timer can be used for the terminal device to wait to receive new downlink data from the network device within the running time of the inactive timer, and the downlink retransmission timer can be used for the downlink retransmission timing of the terminal device.
  • the device is waiting to receive downlink retransmission data from the network device within the operating time of the device, and the uplink retransmission timer can be used for the terminal device to send uplink retransmission data within the operating time of the uplink retransmission timer.
  • FIG. 5 is a schematic diagram of requesting SI in the second implementation of the first timer.
  • the terminal device is in the onduration period of the C-DRX cycle.
  • the terminal device can send Msg1 for requesting SI.
  • the network device receives Msg1 for requesting SI, , Send the PDCCH for scheduling the RAR to the terminal device, and then the network device sends the RAR to the terminal device, and the terminal device obtains the RAR according to the scheduling of the PDCCH for scheduling the RAR.
  • the terminal device has started the first timer in the on duration time period, and the terminal device can restart the first timer after receiving the RAR, and the terminal device is in the running time of the first timer ⁇ is active.
  • the network device also maintains the first timer.
  • the network device can send the PDCCH for scheduling SI within the running time of the first timer, and the terminal device can receive the SI for scheduling within the running time of the first timer.
  • PDCCH PDCCH.
  • the PDCCH used for scheduling SI may be scrambled by C-RNTI, for example.
  • the terminal device can restart the inactive timer to receive SI within the running time of the inactive timer; or, if the first A timer is not implemented by an inactive timer.
  • the first timer is an uplink retransmission timer or a downlink retransmission timer.
  • the terminal device can restart the inactive timer, To receive SI within the running time of the inactive timer. Therefore, the terminal device can be considered to be in an active state from receiving RAR to receiving SI, as shown in Figure 5.
  • the terminal device is in the active state after starting or restarting the first timer.
  • the power consumption can be less than the power consumption of the terminal device during the on-duration period to minimize the terminal device’s power consumption.
  • the power consumption may also be equal to the power consumption of the terminal device during the on duration time period, which is not specifically limited.
  • the network device may try to send the downlink control channel for scheduling the SI to the terminal device within the running time of the first timer. Then, after the terminal device starts or restarts the first timer, it can receive the downlink control channel used to schedule the SI from the network device within the running time of the first timer.
  • the downlink control channel used to schedule SI generally carries the flipped NDI, so after receiving the downlink control channel used to schedule SI (or when receiving the downlink control channel used to schedule SI), the terminal device can start or restart Inactive timer.
  • the network device can also start or restart the first timer.
  • the terminal device is in the active state during the running time of the inactive timer. Therefore, the network device can send SI to the terminal device through dedicated signaling as much as possible during the running time of the inactive timer, and the terminal device can also The SI from the network device is received through dedicated signaling during the running time of the inactive timer.
  • Dedicated signaling is, for example, radio resource control (RRC) signaling, or it may also be downlink control information (DCI) or media access control control element (MAC CE), etc. .
  • the terminal device if the terminal device (or network device) has started the inactive timer before receiving the downlink control channel for scheduling SI, and the inactive timer has not expired (for example, a possible situation, the first timer is (Implemented by the inactive timer), the terminal device (or network device) restarts the inactive timer after receiving the downlink control channel for scheduling SI (or when receiving the downlink control channel for scheduling SI); Or, if the terminal device (or network device) does not start the inactive timer before receiving the downlink control channel for scheduling SI, or although the inactive timer has been started, the inactive timer has timed out, then the terminal device (Or network equipment) after receiving the downlink control channel for scheduling SI (or when receiving the downlink control channel for scheduling SI), it starts the inactive timer.
  • the terminal device or network device
  • the SI when the network device sends the SI, the SI may be carried in a dedicated message for sending.
  • the dedicated message may be a message dedicated to sending the SI under the protection of the embodiment of the present application.
  • the dedicated message is the dedicated signaling as described above.
  • the dedicated message is an RRC message, or may also be another type of message.
  • the network device may also send SI through an existing message.
  • the network device may carry the SI in an RRC connection reconfiguration message (RRC connection reconfiguration) and send it, or may also carry the SI in other messages and send it.
  • RRC connection reconfiguration RRC connection reconfiguration
  • the existing message is the dedicated signaling as described above. It can be seen that the "dedicated signaling" described in the embodiments of this application is only used to distinguish it from “broadcast signaling". Existing messages can be reused when sending SI, which not only achieves the purpose of sending SI, but also saves transmission resources, and also makes the solution provided by the embodiments of the present application easier to be compatible with existing protocols.
  • the technical solutions provided by the embodiments of this application can allow the terminal device to obtain SI when it should be in the C-DRX dormant state, that is, allow the terminal device to be in the non-C-DRX state.
  • Obtaining SI during the activation period or in other words, allows the terminal device to delay entering the dormant state of C-DRX.
  • the permission for the terminal device may be instructed in advance by the network device.
  • the network device may send a fourth message to the terminal device, and the fourth message is used to indicate that the terminal device is allowed to be in C -Obtain SI during the inactive period of the DRX mechanism.
  • the terminal device After receiving the fourth message from the network device, the terminal device can determine that it can obtain the SI during the inactive period of the C-DRX mechanism.
  • the network device sends the fourth message to the terminal device, it is used to indicate that the terminal device is allowed to obtain the SI during the inactive period of the C-DRX mechanism. As long as the terminal device receives the fourth message, it can clearly obtain the SI during the inactive period of the C-DRX mechanism.
  • the value of the fourth message can be arbitrary.
  • the fourth message may carry 1 bit, if the value of this bit is "1", it means that the fourth message indicates that the terminal device is allowed to obtain SI during the inactive period of the C-DRX mechanism, and if The value of this 1 bit is "0", which indicates that the fourth message indicates that the terminal device is not allowed to obtain SI during the inactive period of the C-DRX mechanism. Then, whether the network device allows or does not allow the terminal device to obtain SI during the inactive period of the C-DRX mechanism, it can send the fourth message to the terminal device, but the value of 1 bit carried in the fourth message may be different of. After receiving the fourth message, the terminal device can determine whether the SI can be obtained during the inactive period of the C-DRX mechanism according to the value of 1 bit carried in the fourth message.
  • whether the terminal device is allowed to obtain the SI during the inactive period of the C-DRX mechanism may not be instructed by the network device, for example, it may also be stipulated by the protocol, and there is no specific restriction.
  • the terminal device can use the method provided in the embodiment shown in FIG. 3 to acquire the SI. Or, even if the terminal device determines that it can acquire SI during the inactive period of the C-DRX mechanism, the terminal device can also determine whether the SI that needs to be acquired is emergency SI when it needs to acquire SI.
  • the so-called emergency SI refers to The SI must be obtained in a short period of time, otherwise some work of the terminal device may not be possible. If the terminal device determines that the SI that needs to be acquired is urgent SI, the terminal device can use the method provided in the embodiment shown in FIG. 3 to acquire the SI.
  • the terminal device may not use the method provided in the embodiment shown in FIG. 3 to acquire the SI, that is, not acquire the SI during the inactive period, but may delay Obtaining the SI, for example, can be delayed until the C-DRX is activated before requesting the SI from the network device.
  • the terminal device can obtain the SI in an Msg3 based manner.
  • the terminal device can delay obtaining the SI, for example, it can delay the C-DRX activation state before requesting the SI from the network device, for example, the terminal device
  • the SI can be obtained through Msg3 based.
  • the terminal device after receiving the RAR from the network device, the terminal device can start or restart the first timer, so that the terminal device will not sleep during the running time of the first timer, so as to ensure that it can receive the RAR from the network as much as possible.
  • the device's downlink control channel used to schedule SI so that it can further receive SI. In this way, the success rate of receiving SI by the terminal device is improved.
  • whether the terminal device can obtain the SI using the method provided in the embodiment of the present application can also be instructed by the network device, which is more flexible in implementation.
  • FIG. 6 is a schematic block diagram of a communication device 600 according to an embodiment of the application.
  • the communication device 600 is, for example, a terminal device 600, and the terminal device 600 includes:
  • the transceiver module 620 is configured to send a first message for requesting system information to a network device
  • the transceiver module 620 is further configured to receive a second message from the network device, and determine that the second message is a response message of the first message;
  • the processing module 610 is configured to start or restart a first timer, so as to wait to receive the downlink control channel for scheduling the system information within the running time of the first timer, wherein During the running time, the communication device 600 is in an active state.
  • processing module 610 is configured to start or restart the first timer in the following manner:
  • the transceiver module 620 When the transceiver module 620 receives the second message, start or restart the first timer; or,
  • the processing module 610 is further configured to obtain the pre-configured timing duration of the first timer; or,
  • the transceiver module 620 is further configured to receive a third message from the network device, where the third message is used to indicate the timing duration of the first timer.
  • the first timer is an inactive timer, a downlink retransmission timer, or an uplink retransmission timer in a discontinuous reception mechanism;
  • the inactive timer is used for the communication device 600 to wait to receive new downlink data from the network device within the running time of the inactive timer, and the downlink retransmission timer is used for the communication device 600 to retransmit in the downlink.
  • the transmission timer waits to receive the downlink retransmission data from the network device within the running time of the transmission timer, and the uplink retransmission timer is used for the communication device 600 to send the uplink retransmission data within the running time of the uplink retransmission timer.
  • the transceiver module 620 is further configured to receive the downlink control channel used to schedule the system information from the network device;
  • the processing module 610 is also used to start or restart an inactive timer, where the communication device 600 is in an active state during the running time of the inactive timer;
  • the transceiver module 620 is further configured to receive the system information from the network device according to the scheduling of the downlink control channel during the running time of the inactive timer.
  • the transceiver module 620 is configured to receive the system information from the network device in the following manner:
  • the dedicated message carrying the system information.
  • the processing module 610 is configured to determine that the second message is a response message of the first message in the following manner:
  • the transceiver module 620 is further configured to receive a fourth message from the network device;
  • the processing module 610 is further configured to determine that the fourth message is used to indicate that the communication device 600 is allowed to obtain system information during the inactive period of the discontinuous reception mechanism.
  • processing module 610 in the embodiment of the present application may be implemented by a processor or a processor-related circuit component
  • transceiver module 620 may be implemented by a transceiver or a transceiver-related circuit component.
  • an embodiment of the present application also provides a communication device 700.
  • the communication device 700 is, for example, a terminal device 700.
  • the terminal device 700 includes a processor 710, a memory 720, and a transceiver 730.
  • the memory 720 stores instructions. Or a program.
  • the processor 710 is configured to execute instructions or programs stored in the memory 720. When the instructions or programs stored in the memory 720 are executed, the processor 710 is configured to execute the operations performed by the processing module 610 in the foregoing embodiment, and the transceiver 730 is configured to execute the operations performed by the transceiver module 620 in the foregoing embodiment.
  • the communication device 600 or the communication device 700 may correspond to the terminal device in the embodiment shown in FIG. 3, and the operation and/or function of each module in the terminal device 600 or the terminal device 700 are respectively In order to implement the corresponding process in the embodiment shown in FIG. 3, for the sake of brevity, details are not described herein again.
  • FIG. 8 is a schematic block diagram of a communication device 800 provided by an embodiment of the application.
  • the communication device 800 is, for example, a terminal device 800, and the network device 800 includes:
  • the transceiver module 820 is configured to receive a first message for requesting system information from a terminal device
  • the transceiver module 820 is further configured to send a second message to the terminal device, where the second message is a response message to the first message;
  • the processing module 810 is configured to start or restart a first timer, so as to send a downlink control channel for scheduling the system information within the running time of the first timer.
  • processing module 810 is configured to start or restart the first timer in the following manner:
  • transceiver module 820 When the transceiver module 820 sends the second message, start or restart the first timer; or,
  • the transceiver module 820 is further configured to send a third message to the terminal device, where the third message is used to indicate the timing duration of the first timer.
  • the first timer is an inactive timer, a downlink retransmission timer, or an uplink retransmission timer in a discontinuous reception mechanism;
  • the inactive timer is used for the communication device 800 to send new downlink data within the operating time of the inactive timer
  • the downlink retransmission timer is used for the communication device 800 during the operating time of the downlink retransmission timer Sending the downlink retransmission data
  • the uplink retransmission timer is used for the communication device 800 to wait to receive the uplink retransmission data from the terminal device within the running time of the uplink retransmission timer.
  • the transceiver module 820 is further configured to send the downlink control channel used for scheduling the system information to the terminal device;
  • the processing module 810 is also used to start or restart the inactive timer
  • the transceiver module 820 is further configured to send the system information to the terminal device according to the scheduling of the downlink control channel during the running time of the inactive timer.
  • the transceiver module 820 is configured to send the system information to the terminal device in the following manner:
  • the second message is a response message of the first message, and includes:
  • the second message only contains RAPID.
  • the transceiver module 820 is further configured to send a fourth message to the terminal device, where the fourth message is used to indicate that the terminal device is allowed to obtain data during the inactive period of the discontinuous reception mechanism. system message.
  • processing module 810 in the embodiment of the present application may be implemented by a processor or processor-related circuit components
  • transceiver module 820 may be implemented by a transceiver or transceiver-related circuit components.
  • an embodiment of the present application also provides a communication device 900.
  • the communication device 900 is, for example, a network device 900.
  • the network device 900 includes a processor 910, a memory 920, and a transceiver 930.
  • the memory 920 stores instructions. Or a program, and the processor 910 is configured to execute instructions or programs stored in the memory 920.
  • the processor 910 is configured to perform the operations performed by the processing module 810 in the foregoing embodiment
  • the transceiver 930 is configured to perform the operations performed by the transceiver module 820 in the foregoing embodiment.
  • the network device 800 or the network device 900 may correspond to the network device in the embodiment shown in FIG. 3, and the operations and/or functions of each module in the network device 800 or the network device 900 are respectively In order to implement the corresponding process in the embodiment shown in FIG. 3, for the sake of brevity, details are not described herein again.
  • the embodiment of the present application also provides a communication device, which may be a terminal device or a circuit.
  • the communication device may be used to perform actions performed by the terminal device in the method embodiment shown in FIG. 3 above.
  • FIG. 10 shows a simplified structural diagram of the terminal device. It is easy to understand and easy to illustrate.
  • the terminal device uses a mobile phone as an example.
  • the terminal equipment includes a processor, a memory, a radio frequency circuit, an antenna, and an input and output device.
  • the processor is mainly used to process the communication protocol and communication data, and to control the terminal device, execute the software program, and process the data of the software program.
  • the memory is mainly used to store software programs and data.
  • the radio frequency circuit is mainly used for the conversion of baseband signal and radio frequency signal and the processing of radio frequency signal.
  • the antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal devices may not have input and output devices.
  • the processor When data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data.
  • only one memory and processor are shown in FIG. 10. In actual terminal equipment products, there may be one or more processors and one or more memories.
  • the memory may also be referred to as a storage medium or storage device.
  • the memory may be set independently of the processor, or may be integrated with the processor, which is not limited in the embodiment of the present application.
  • the antenna and radio frequency circuit with the transceiving function can be regarded as the transceiving unit of the terminal device
  • the processor with the processing function can be regarded as the processing unit of the terminal device.
  • the terminal device includes a transceiver unit 1010 and a processing unit 1020.
  • the transceiver unit may also be referred to as a transceiver, a transceiver, a transceiver, and so on.
  • the processing unit may also be called a processor, a processing board, a processing module, a processing device, and so on.
  • the device for implementing the receiving function in the transceiver unit 1010 can be regarded as the receiving unit, and the device for implementing the sending function in the transceiver unit 1010 as the sending unit, that is, the transceiver unit 1010 includes a receiving unit and a sending unit.
  • the transceiver unit may sometimes be called a transceiver, a transceiver, or a transceiver circuit.
  • the receiving unit may sometimes be called a receiver, receiver, or receiving circuit.
  • the transmitting unit may sometimes be called a transmitter, a transmitter, or a transmitting circuit.
  • transceiving unit 1010 is used to perform the sending operation and receiving operation on the terminal device side in the method embodiment shown in FIG. 3, and the processing unit 1020 is used to perform the method embodiment shown in FIG. Operations other than operations.
  • the transceiver unit 1010 is configured to perform S31 and S32 in the embodiment shown in FIG. 3.
  • the processing unit 1020 is configured to perform the operation performed by the terminal device in S33 in the embodiment shown in FIG. 3, and/or the processing unit 1020 is also configured to perform other processing steps on the terminal device side in the embodiment of the present application.
  • the chip When the communication device is a chip, the chip includes a transceiver unit and a processing unit.
  • the transceiver unit may be an input/output circuit or a communication interface;
  • the processing unit is a processor or microprocessor or integrated circuit integrated on the chip.
  • the device shown in FIG. 11 can be referred to.
  • the device can perform functions similar to the processor 710 in FIG. 7.
  • the device includes a processor 1110, a data sending processor 1120, and a data receiving processor 1130.
  • the processing module 610 in the foregoing embodiment may be the processor 1110 in FIG. 11, and completes corresponding functions.
  • the transceiver module 620 in the foregoing embodiment may be the data sending processor 1120 and/or the data receiving processor 1130 in FIG. 11.
  • channel encoder and the channel decoder are shown in FIG. 11, it can be understood that these modules do not constitute a restrictive description of this embodiment, and are only illustrative.
  • the processing device 1200 includes modules such as a modulation subsystem, a central processing subsystem, and a peripheral subsystem.
  • the communication device in this embodiment can be used as a modulation subsystem therein.
  • the modulation subsystem may include a processor 1203 and an interface 1204.
  • the processor 1203 performs the function of the aforementioned processing module 610, and the interface 1204 performs the function of the aforementioned transceiver module 620.
  • the modulation subsystem includes a memory 1206, a processor 1203, and a program stored in the memory 1206 and running on the processor.
  • the processor 1203 implements the method shown in FIG. 3 when the program is executed. The method on the terminal device side in the example.
  • the memory 1206 can be non-volatile or volatile, and its location can be located inside the modulation subsystem or in the processing device 1200, as long as the memory 1206 can be connected to the The processor 1203 is sufficient.
  • the embodiment of the present application also provides a computer-readable storage medium on which a computer program is stored.
  • the program When the program is executed by a processor, it can implement the process related to the network device in the embodiment shown in FIG. 3 provided by the foregoing method embodiment.
  • the embodiment of the present application also provides a computer-readable storage medium on which a computer program is stored.
  • the program When the program is executed by a processor, it can implement the process related to the terminal device in the embodiment shown in FIG. 3 provided by the above method embodiment. .
  • the embodiment of the present application also provides a computer program product containing instructions, which when executed, execute the method on the terminal device side in the method embodiment shown in FIG. 3.
  • the embodiment of the present application also provides a computer program product containing instructions that, when executed, execute the method on the network device side in the method embodiment shown in FIG. 3.
  • processors mentioned in the embodiments of the present application may be a central processing unit (central processing unit, CPU), or may also be other general-purpose processors, digital signal processors (digital signal processors, DSP), or application specific integrated circuits ( application specific integrated circuit (ASIC), ready-made programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.
  • CPU central processing unit
  • DSP digital signal processors
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the memory mentioned in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electrically available Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be random access memory (RAM), which is used as an external cache.
  • RAM random access memory
  • static random access memory static random access memory
  • dynamic RAM dynamic random access memory
  • synchronous dynamic random access memory synchronous DRAM, SDRAM
  • double data rate synchronous dynamic random access memory double data rate SDRAM, DDR SDRAM
  • enhanced synchronous dynamic random access memory enhanced SDRAM, ESDRAM
  • synchronous connection dynamic random access memory serial DRAM, SLDRAM
  • direct rambus RAM direct rambus RAM, DR RAM
  • the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component
  • the memory storage module
  • the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, rather than corresponding to the embodiments of the present application.
  • the implementation process constitutes any limitation.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It 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 they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • each 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 function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment 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 .

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Abstract

La présente invention concerne un procédé et un dispositif de demande d'informations de système, le procédé de demande d'informations de système comprenant les étapes consistant à : envoyer à un dispositif de réseau un premier message pour demander des informations de système ; recevoir un deuxième message en provenance du dispositif de réseau, et déterminer que le deuxième message est un message de réponse du premier message ; et démarrer ou redémarrer un premier temporisateur de façon à attendre la réception, pendant le temps de fonctionnement du premier temporisateur, d'un canal de commande de liaison descendante pour planifier les informations de système. Un dispositif terminal reste dans un état actif pendant le temps de fonctionnement du premier temporisateur. Des modes de réalisation de l'invention sont utilisés pour commander le moment auquel des dispositifs terminaux entrent dans un état de veille, de façon à améliorer les taux de réussite de réception d'informations de système.
PCT/CN2020/074749 2019-03-13 2020-02-11 Procédé et dispositif de demande d'informations de système WO2020181943A1 (fr)

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