WO2022170545A1 - Procédé et appareil de rétablissement de liaison radio - Google Patents

Procédé et appareil de rétablissement de liaison radio Download PDF

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Publication number
WO2022170545A1
WO2022170545A1 PCT/CN2021/076449 CN2021076449W WO2022170545A1 WO 2022170545 A1 WO2022170545 A1 WO 2022170545A1 CN 2021076449 W CN2021076449 W CN 2021076449W WO 2022170545 A1 WO2022170545 A1 WO 2022170545A1
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Prior art keywords
rrc connection
message
base station
random access
establishment
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PCT/CN2021/076449
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English (en)
Chinese (zh)
Inventor
成后发
李雨龙
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华为技术有限公司
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Priority to PCT/CN2021/076449 priority Critical patent/WO2022170545A1/fr
Priority to CN202180004632.3A priority patent/CN115211220A/zh
Publication of WO2022170545A1 publication Critical patent/WO2022170545A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the embodiments of the present application relate to the field of wireless communication technologies, and in particular, to a method and apparatus for reestablishing a wireless link.
  • the network environment of mobile wireless communication still has unfavorable factors such as complex and changeable, and poor anti-interference.
  • the reconstruction of the wireless link takes a long time, which is not conducive to the quick recovery of the service.
  • the terminal needs to initiate three random access applications to the base station to obtain uplink resources, and then send radio resource control (RRC) to the base station in turn.
  • RRC radio resource control
  • RLC radio link control
  • the terminal receives the RRC connection reconfiguration message sent by the base station, obtains uplink resources through the scheduling request configuration carried in the RRC connection reconfiguration message, and sends an RRC connection reconfiguration complete message to the base station. So far, the reconstruction of the wireless link is completed.
  • Contention-based random access is suitable for low-intensity uplink resource requests.
  • the terminal needs to continuously initiate multiple random access applications in order to rebuild the wireless link, resulting in a long time to rebuild the wireless link, detrimental to the user's communication experience, and at the same time increasing the load on the network side and the power consumption of the terminal.
  • Embodiments of the present application provide a method and apparatus for reestablishing a wireless link, so as to speed up the recovery of the wireless link, thereby ensuring user service quality and communication experience.
  • an embodiment of the present application provides a method for reestablishing a radio link.
  • the method can be performed by a terminal or a chip used for the terminal.
  • the method includes: sending a radio resource control RRC connection reestablishment request message to a base station, where the RRC The connection re-establishment request message is used to request to re-establish the RRC connection; receive the RRC connection re-establishment message from the base station, the RRC connection re-establishment message is used to respond to the RRC connection re-establishment request message; receive the RRC connection re-configuration message from the base station , wherein the RRC connection reconfiguration message carries the resource indication information of the scheduling request; according to the resource indication information, a scheduling request is sent to the base station, and a scheduling indication message from the base station is received, and the scheduling indication message is used for Granting uplink resources; using the granted uplink resources to send a radio link control RLC response message, an RRC connection
  • the terminal efficiently utilizes the resource indication information of the scheduling request carried in the RRC connection reconfiguration message, and obtains the uplink resource grant by sending the scheduling request to the base station. Therefore, the terminal can send the RLC response message, the RRC connection reestablishment complete message and the RRC connection reconfiguration complete message on the uplink resource.
  • adopting the above solution is beneficial to the rapid reconstruction of the wireless link, reduces the load on the network side, and is beneficial to improving the service experience of the user.
  • the uplink transmission of the RLC response message and the RRC connection reestablishment complete message is carried out by means of random access, which is time-consuming and inefficient. Therefore, reducing the number of random accesses is a very effective method.
  • the embodiments of the present application provide the following different methods for reducing the number of random accesses, including but not limited to:
  • configure the duration of suspending sending random access preambles to the base station so that it can be adjusted can include any of the following: one transmission time interval TTI, two TTIs, or three TTIs. a TTI, or another TTI.
  • the duration can be called waiting time T.
  • the resource information indicated by the scheduling request in the RRC connection reconfiguration message can take effect in time by setting the waiting time T reasonably, so as to obtain uplink resources for sending RLC response messages, RRC Connection re-establishment complete message and RRC connection reconfiguration complete message.
  • the subsequent process of the random access preamble is terminated in advance.
  • the resource information indicated by the scheduling request in the RRC connection reconfiguration message can take effect in time, and the RLC response message, the RRC connection reestablishment complete message and the RRC connection reconfiguration complete message can be efficiently sent.
  • an embodiment of the present application provides a wireless communication device, including a processing unit and a transceiving unit, wherein the processing unit is configured to control the transceiving unit, so as to implement the method of the first aspect above or any possible method thereof. Implementation.
  • an embodiment of the present application provides a wireless communication device, and the device may be a terminal or a chip used for the terminal.
  • the apparatus has the function of implementing the method of the first aspect or any possible implementation method thereof. This function can be implemented by hardware or by executing corresponding software by hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • an embodiment of the present application provides a wireless communication device, including a processor and a memory; the memory is used to store computer-executed instructions, and when the communication device is running, the processor executes the computer-executed instructions stored in the memory, to implement the method of the first aspect above or any possible implementation method thereof.
  • an embodiment of the present application provides a wireless communication device, including a processing circuit and an interface circuit, where the interface circuit is configured to be coupled with a memory outside the wireless communication device, and provide the processing circuit with access to the memory.
  • a communication interface; the processing circuit is configured to execute program instructions in the memory to implement the method of the first aspect or any possible implementation method thereof.
  • an embodiment of the present application provides a wireless communication apparatus, which is used to perform a unit or means of each step of the method of the first aspect or any possible implementation method thereof.
  • embodiments of the present application further provide a computer-readable storage medium, where instructions are stored on the computer-readable storage medium, and when the instructions are executed on a computer, the method of the first aspect or the method thereof is implemented. any possible implementation.
  • the embodiments of the present application further provide a computer program product including instructions, which, when running on a computer, implements the method of the first aspect or any possible implementation method thereof.
  • the wireless communication device may be a wireless communication device, or may be a part of a device in the wireless communication device, such as an integrated circuit product such as a system chip or a communication chip.
  • the wireless communication device may be a computer device that supports wireless communication functionality.
  • the wireless communication device may be a terminal such as a smartphone.
  • a system-on-chip may also be referred to as a system on chip (system on chip, SoC), or simply referred to as a SoC chip.
  • the communication chip may include a baseband processing chip and a radio frequency processing chip.
  • Baseband processing chips are also sometimes referred to as modems or baseband chips.
  • RF processing chips are also sometimes referred to as RF transceivers or RF chips.
  • some or all of the communication chips may be integrated inside the SoC chip.
  • the baseband processing chip is integrated in the SoC chip, and the radio frequency processing chip is not integrated with the SoC chip.
  • FIG. 1 is a schematic structural diagram of a wireless communication system according to an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a control plane radio protocol architecture according to an embodiment of the present application
  • 3 is a schematic diagram of the operation of protocol entities of each layer of the data link layer under a control plane protocol provided by an embodiment of the present application;
  • FIG. 4 is a schematic diagram of mapping between different channels of a wireless communication system provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a contention-based random access process according to an embodiment of the present application.
  • FIG. 6 is a schematic flowchart of an RRC state transition provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of a communication flow of a method for re-establishing a wireless link in the prior art
  • FIG. 8 is a schematic diagram of a communication flow of a method for reestablishing a wireless link according to an embodiment of the present application
  • FIG. 9 is a schematic communication flow diagram of another wireless link re-establishment method provided by an embodiment of the present application.
  • FIG. 10 is a schematic diagram of a communication flow of another wireless link re-establishment method provided by an embodiment of the present application.
  • FIG. 11 is a schematic block diagram of a wireless communication apparatus according to an embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of a wireless communication device according to an embodiment of the present application.
  • devices can be divided into devices that provide wireless network services and devices that use wireless network services.
  • the devices that provide wireless network services refer to those devices that make up a wireless communication network, which can be referred to as network equipment or network elements for short.
  • Network equipment is usually owned by operators (such as China Mobile and Vodafone) or infrastructure providers (such as tower companies), and these manufacturers are responsible for operation or maintenance.
  • Network devices can be further classified into radio access network (RAN) devices and core network (core network, CN) devices.
  • RAN radio access network
  • core network core network
  • a typical RAN device includes a base station (BS).
  • the base station may also sometimes be referred to as a wireless access point (access point, AP), or a transmission reception point (transmission reception point, TRP).
  • the base station may be a generic node B (generation Node B, gNB) in a 5G new radio (new radio, NR) system, or an evolutional Node B (evolutional Node B, eNB) in a 4G long term evolution (long term evolution, LTE) system. ).
  • Devices using wireless network services are usually located at the edge of the network and may be referred to as a terminal for short.
  • the terminal can establish a connection with the network device, and provide the user with specific wireless communication services based on the service of the network device.
  • user equipment user equipment
  • subscriber unit subscriber unit
  • SU subscriber unit
  • terminals tend to move with users and are sometimes referred to as mobile stations (mobile stations, MSs).
  • some network devices such as relay nodes (relay nodes, RNs) or wireless routers, can sometimes be regarded as terminals because they have UE identity or belong to users.
  • the terminal may be a mobile phone, a tablet computer, a laptop computer, a wearable device (such as a smart watch, smart bracelet, smart helmet, smart glasses), and other Devices with wireless access capabilities, such as smart cars, various Internet of things (IOT) devices, including various smart home devices (such as smart meters and smart home appliances) and smart city devices (such as security or monitoring equipment, intelligent road transport facilities), etc.
  • IOT Internet of things
  • smart home devices such as smart meters and smart home appliances
  • smart city devices such as security or monitoring equipment, intelligent road transport facilities
  • the present application will take the base station and the terminal as examples to describe the technical solutions of the embodiments of the present application in detail.
  • FIG. 1 is a schematic structural diagram of a wireless communication system according to an embodiment of the present application.
  • a wireless communication system includes a terminal and a base station.
  • the transmission link from the terminal to the base station is denoted as an uplink (uplink, UL)
  • the transmission link from the base station to the terminal is denoted as a downlink (downlink, DL).
  • uplink uplink
  • downlink downlink
  • data transmission in the uplink may be abbreviated as uplink data transmission or uplink transmission
  • data transmission in the downlink may be abbreviated as downlink data transmission or downlink transmission.
  • the base station can provide communication coverage for a specific geographical area through an integrated or external antenna device.
  • One or more terminals located within the communication coverage of the base station can access the base station.
  • a base station can manage one or more cells. Each cell has an identification, which is also called a cell identity (cell ID). From the perspective of radio resources, a cell is a combination of downlink radio resources and paired uplink radio resources (optional).
  • the wireless communication system may comply with the wireless communication standard of 3GPP, and may also comply with other wireless communication standards, such as the 802 series (such as 802.11, 802.15, or 802.20) of the Institute of Electrical and Electronics Engineers (IEEE). wireless communication standard. Although only one base station and one terminal are shown in FIG. 1 , the wireless communication system may also include other numbers of terminals and base stations. In addition, the wireless communication system may further include other network devices, such as core network devices.
  • the terminal and the base station should know the predefined configuration of the wireless communication system, including the radio access technology (RAT) supported by the system, and the radio resources specified by the system, such as radio frequency bands and carriers.
  • RAT radio access technology
  • a carrier is a frequency range that conforms to system regulations. This frequency range can be determined by the center frequency of the carrier (referred to as the carrier frequency) and the bandwidth of the carrier.
  • the pre-defined configurations of these systems can be used as part of the standard protocols of the wireless communication system, or determined by the interaction between the terminal and the base station.
  • the content of the standard protocol of the wireless communication system may be pre-stored in the memory of the terminal and the base station, and/or embodied as hardware circuits or software codes of the terminal and the base station.
  • the terminal and the base station support one or more of the same RATs, such as 5G NR, 4G LTE, or RATs of future evolution systems.
  • the terminal and the base station use the same air interface parameters, coding scheme, modulation scheme, etc., and communicate with each other based on radio resources specified by the system.
  • the air interface parameter is a parameter used to describe air interface characteristics. In English, air interface parameters are sometimes called numerology.
  • the air interface parameters may include subcarrier spacing (SC), and may also include cyclic prefix (cyclic prefix, CP).
  • SC subcarrier spacing
  • CP cyclic prefix
  • the wireless communication system can support a variety of different air interface parameters, which can be used as part of a standard protocol.
  • FIG. 2 is a schematic diagram of a control plane radio protocol architecture according to an embodiment of the present application.
  • the radio protocol architecture may correspond to the radio protocol architecture of 3GPP.
  • the NR radio protocol stack is divided into two planes: the user plane and the control plane.
  • the User Plane (UP) protocol stack is the protocol cluster adopted for user data transmission
  • the Control Plane (CP) protocol stack is the protocol cluster adopted for the system control signaling transmission.
  • the user plane protocol is mainly responsible for functions related to user data transmission
  • the control plane protocol is mainly responsible for functions such as connection establishment, mobility management and security management.
  • the wireless protocol architecture corresponds to the control plane protocol, from the bottom layer protocol to the high layer protocol, forming a protocol stack, which is divided into three layers, namely the first layer (layer 1) and the second layer (layer 2) and the third layer (layer 3).
  • Each layer of protocol entities in the wireless protocol architecture is set up inside the terminal and the base station, and the entities of each layer protocol exchange (including receiving from and sending to it) service data units (SDUs) with the upper layers, and exchange with the lower layers.
  • Protocol data unit protocol data unit
  • Layer 1 is also called the physical layer, including the physical (physical, PHY) layer protocol, and the control plane protocol stack uses it as the underlying protocol.
  • the PHY protocol can be used to perform encoding/decoding, modulation/demodulation, multi-antenna mapping, mapping of signals to time-frequency resources, and other typical physical layer functions.
  • the PHY protocol provides transport channel services to the upper layer (ie layer 2) protocol, and is responsible for handling the mapping of transport channels to physical channels.
  • Layer 2 refers to the data link layer, which in turn includes: media access control (MAC) protocol, radio link control (radio link control, RLC) protocol, packet data convergence protocol (packet data convergence protocol, PDCP).
  • MAC media access control
  • RLC radio link control
  • PDCP packet data convergence protocol
  • the MAC protocol can be used to perform logical channel multiplexing, hybrid automatic repeat request (HARQ), scheduling and scheduling related functions.
  • HARQ hybrid automatic repeat request
  • the MAC protocol provides logical channel services to higher-layer protocols (such as the RLC protocol), and is responsible for the mapping of logical channels to transport channels.
  • the RLC protocol may be used to perform segmentation and retransmission processing of RLC data.
  • the RLC protocol can provide the service of the RLC channel to the upper layer protocol (such as the PDCP protocol).
  • each RLC channel (and each radio bearer) may correspond to one RLC entity.
  • An RLC entity can be configured in three modes: transparent mode (TM), unacknowledged mode (UM) and acknowledged mode (AM).
  • TM mode transparent transmission function of data is provided, that is, it is only responsible for sending the transmitted content to the destination address without making any changes to the data content.
  • the protocol provides all RLC functions except retransmission and re-segmentation, which is an unreliable transmission service.
  • AM mode provides all RLC functions, ensuring reliable transmission service through error detection and retransmission.
  • the RLC layer at the receiving end needs to send an acknowledgement message (acknowlegement, ACK) or a negative acknowledgement message (negative acknowlegement, NACK) to confirm the success of information reception.
  • the above message is carried by the status PDU of the RLC layer entity. .
  • the PDCP protocol can be used to perform functions such as Internet Protocol (Internet Protocol, IP) packet header compression, encryption and integrity protection.
  • the PDPC protocol can also be used for functions such as sequence numbering and in-order delivery of PDCP data.
  • the PDCP protocol can provide a radio bearer (RB) service to an upper layer protocol (ie, layer 3).
  • RB radio bearer
  • SRB signaling radio bearer
  • DRB data radio bearer
  • Layer 3 the network layer, includes the radio resource control (RRC) protocol and the non-access stratum (NAS) protocol in the control plane protocols.
  • RRC radio resource control
  • NAS non-access stratum
  • the NAS protocol can be used to perform functions such as authentication, mobility management, and security control.
  • the RRC protocol can be used to perform functions such as system message broadcasting, paging message sending, RRC connection management, cell selection and reselection, measurement configuration and reporting, etc. This function is realized through the transmission of control plane signaling. It is encapsulated at the data link layer as a control plane message containing the corresponding control plane signaling.
  • the control signaling messages of the RRC layer are transmitted using SRBs, and a variety of SRBs are defined in NR, mainly including SRB0, SRB1, SRB2 and SRB3.
  • SRB0 is a radio bearer established by default without integrity protection and encryption processing.
  • the SRB1 is used to send an RRC message to indicate the state and change of the RRC connection, such as air interface node configuration, link switching, etc., and is used to send a NAS message before the SRB2 is established.
  • SRB2 is configured after AS security is activated, and is used to send RRC messages including recorded measurement information and NAS messages, which can offload the signaling load of SRB1.
  • SRB3 is used to carry specific RRC signaling.
  • FIG. 3 is a schematic diagram of operations of protocol entities at each layer of a data link layer under a control plane protocol provided by an embodiment of the present application.
  • the control signaling is a PDCP SDU relative to the PDCP layer.
  • the PDCP SDU is encrypted, etc., and is handed down to the associated RLC entity as a PDCP PDU.
  • This PDCP PDU is an RLC SDU relative to the RLC layer, and the RLC entity performs operations such as segmenting it, and finally outputs one or more RLC PDUs.
  • the above one or more RLC PDUs are one or more MAC SDUs relative to the MAC layer.
  • MAC SDUs are multiplexed into one or more MAC PDUs according to the transmission restrictions indicated by the uplink resources, waiting for a transmission opportunity to the base station.
  • an information header is also added to indicate the relevant parameter information of each layer.
  • FIG. 4 is a schematic diagram of mapping between different channels of a wireless communication system according to an embodiment of the present application.
  • the channels of the wireless communication system may include logical channels, transport channels, and physical channels.
  • the logical channel is the channel between the RLC layer and the MAC layer
  • the transmission channel is the channel between the MAC layer and the PHY layer
  • Wu Lixinda is the channel through which the PHY layer actually transmits information.
  • Logical channels are mapped to corresponding transport channels, which in turn are mapped to corresponding physical channels.
  • Logical channels are defined by the type of information carried by the channel, and are usually divided into control channels and data channels.
  • the control channel carries the control and configuration information required for the operation of the wireless communication system, corresponding to the control plane protocol stack, and the data channel corresponds to the data plane protocol stack and carries user data.
  • the logical channels may include a broadcast control channel (BCCH), a paging control channel (PCCH), a common control channel (CCCH), and a dedicated control channel (DCCH). ), and a dedicated traffic channel (DTCH).
  • BCCH broadcast control channel
  • PCCH paging control channel
  • CCCH common control channel
  • DCCH dedicated control channel
  • DTCH dedicated traffic channel
  • SRB0 uses CCCH for transmission
  • SRB1, SRB2 and SRB3 use DCCH.
  • Transport channels define the manner and characteristics of data transmission over the air interface. Data in a transport channel can be multiplexed into a transport block (TB) and sent within a transmission time interval (TTI).
  • the transport channels may include a broadcast channel (BCH), a paging channel (PCH), a downlink shared channel (DL-SCH), and an uplink shared channel (UL-SCH).
  • BCH broadcast channel
  • PCH paging channel
  • DL-SCH downlink shared channel
  • UL-SCH uplink shared channel
  • RACH random access channel
  • SCH shared channel
  • the physical channel corresponds to a set of time-frequency resources used to carry control channels, and these time-frequency resources may refer to the time-frequency resource grid shown in FIG. 4 .
  • Physical channels may include physical downlink shared channel (PDSCH), physical broadcast channel (PBCH), physical downlink control channel (PDCCH), physical uplink shared channel (physical uplink shared channel) , PUSCH), physical uplink control channel (physical uplink control channel, PUCCH).
  • PDSCH physical downlink shared channel
  • PBCH physical broadcast channel
  • PDCCH and PUCCH do not have corresponding control channels, and are respectively used to carry downlink control information (downlink control information, DCI) and uplink control information (uplink control information, UCI).
  • DCI or UCI provides configuration information required for downlink data transmission and uplink data transmission.
  • UCI has a variety of predefined formats, and these predefined formats will contain some given information elements (information elements, IE).
  • the information element can be understood as a given field of UCI, the value range of this field and the meaning of each value can be predefined by the system.
  • one type is recorded as a scheduling request (SR), which is used to request access from the base station and upload data.
  • SR scheduling request
  • the precondition that the UCI can carry the SR is that the base station has configured the SR configuration PUCCH for the terminal side, and the SR configuration is periodic and dedicated to the terminal.
  • the process of scheduling request is as follows: the terminal receives the SR configuration transmitted by the base station; the terminal sends an SR on the PUCCH to inform the base station that there is data to be uploaded; the terminal receives a scheduling instruction message, which is transmitted downlink through the PDCCH, which Contains the specific authorization information of the uplink resource PUSCH of the base station, which is used to indicate the resource location, transmission format, multi-antenna configuration, and power control of uplink data transmission; the terminal performs uplink transmission of the to-be-sent message; the terminal receives hybrid automatic retransmission A HARQ feedback confirmation message is requested, and the HARQ feedback confirmation message is used to confirm the successful transmission of the to-be-sent message. It can be seen from the above process that since the SR is configured exclusively for the terminal, the speed at which the terminal accesses the base station is accelerated, so that the uplink authorized resources can be quickly obtained and the uplink transmission is very efficient.
  • Random access is another process in which a terminal requests access from a base station, receives a response from the base station, and allocates an access channel.
  • the uplink transmission of data is generally performed after random access is successful.
  • Random access is generally divided into a contention-based random access procedure and a non-contention-based random access procedure. The biggest difference is that the allocation of the access preamble in the former is generated by the terminal, so there are more competition and process of conflict resolution.
  • random access is a contention-based random access procedure.
  • FIG. 5 is a schematic diagram of a contention-based random access process according to an embodiment of the present application.
  • the dotted boxes in the figure are different actions that the terminal can take, and the dotted lines represent the steps that may occur but are not necessary for a complete random access process, as follows:
  • Step 501 The terminal sends a random access preamble, where the random access preamble is used to obtain uplink resource grants.
  • the base station may receive random access preambles sent by multiple terminals at the same time, but does not respond to all the received random access preambles. Therefore, the terminal starts a backoff window (backoff), and monitors the feedback of the base station within the backoff window (that is, the random access response, the random access response corresponds to the aforementioned random access preamble), and performs the following operations:
  • Step 502a the base station has no feedback or the random access response sent is incorrect, and the terminal attempts to send a new random access preamble to the base station again until the number of attempts expires or a correct random access response is received.
  • Step 502b the terminal receives a correct random access response from the base station, where the random access response carries the configuration requirement information of the uplink resources and the size information of the uplink TB.
  • Step 503 The terminal transmits one TB upstream, which is denoted as Msg 3; the size of the TB conforms to the size information of the upstream TB in the random access response.
  • Msg 3 Due to network instability, the transmission of Msg 3 may fail, so the terminal takes the following actions according to the feedback from the base station (that is, the contention resolution message, which should correspond to the aforementioned Msg 3):
  • Step 504a the base station has no feedback or the contention resolution message sent is incorrect, and the terminal retransmits Msg 3 based on the configuration, up to the maximum number of retransmissions; if the contention resolution message has not been received, the random access process is re-initiated.
  • Step 504b the terminal receives a correct contention resolution message from the base station, where the contention resolution message is used to indicate that the Msg 3 is successfully sent and the random access procedure ends.
  • the Msg 3 refers to an RRC connection re-establishment request, an RRC connection re-establishment complete message and an RLC response message; since the size of the Msg 3 is specified by the base station, its content is what the terminal needs to upload The complete content or partial content of the information; if the Msg 3 carries partial content, the terminal will initiate a new random access process again after this random access process ends, until the information to be transmitted is sent.
  • the delay of random access is uncertain, and if the size of the information content to be uploaded exceeds the limit in the random access response, the terminal needs to start the second random access process. Therefore, the uplink transmission achieved by random access has the characteristics of time delay, uncertainty and inefficiency.
  • FIG. 6 is a schematic flowchart of an RRC state transition provided by an embodiment of the present application.
  • the terminal and the base station can enter different NR RRC protocol states, the states include: idle state (RRC_IDLE), connected state (RRC_CONNECTED) and inactive state (RRC_INACTIVE), the reasons may include mobility change or service trigger, etc.
  • the terminal when the terminal is in the NR RRC_IDLE state, it monitors the broadcast message of the gNB where it is located.
  • the terminal When the scene changes, such as registration or service triggering, the terminal establishes a link with the base station, and transfers from the NR RRC_IDLE state to the NR RRC_CONNECTED state. After the connection is released, it can be transferred back to the NR RRC_IDLE state.
  • the terminal is in the NR RRC_CONNECTED state, the connection is suspended and enters the NR RRC_INACTIVE state because there is no service temporarily. After the service is triggered, the connection resumes and enters the NR RRC_CONNECTED state.
  • the terminal When the terminal is in the NR RRC_INACTIVE state, the connection is released into the NR RRC_IDLE state.
  • the terminal when the terminal starts service communication, it will enter the RRC_CONNECTED state.
  • This requires establishing an RRC communication connection, and ensuring the integrity and confidentiality of communication by configuring access stratum (AS) security.
  • the AS security includes the integrity protection of the RRC SRB, and the encryption of the SRB and the DRB carrying the data, and its implementation method has a security context (security context).
  • the security context is the temporary state information established by the network for the terminal, including key information and data bearer information. The purpose is to reduce the resource consumption of mutual authentication between the terminal and the network when switching between different states, and to facilitate the terminal to quickly enter the connection state. Secure communication. If AS security is not activated, the original RRC connection and related configurations are deleted, and a new RRC connection is established.
  • establishing an RRC connection includes establishing SRB1, activating AS security, and establishing SRB2 and DRB.
  • the RRC connection between the terminal and the base station is not stable. Due to the instability of the environment, such as: link handover failure, high probability of bit errors in the downlink channel, difficulty in sending the uplink channel, inconsistent parameter configuration and security information understanding between the terminal and the network side, etc., the wireless link will fail.
  • the specific failure reasons are: 1) wireless link reconfiguration failure, including synchronization failure and configuration error; 2) cell handover failure; 3) other reasons.
  • the terminal will search and select a cell with a better signal to initiate connection recovery, and try to restore the wireless link again, so that user data or voice services are not interrupted.
  • the communication process is the re-establishment of the radio link, and the user service is restored by re-establishing the RRC connection.
  • the process includes: restoring and updating the RB configuration and re-activating and updating the AS security.
  • FIG. 7 which is a schematic flowchart of a method for reestablishing a wireless link in the prior art
  • the dashed box represents the random access process
  • the message content of Msg 3 is the message on the arrow in the dashed box.
  • the link re-establishment process includes the following steps:
  • Step 701 The terminal initiates a random access procedure for uplink transmission of an RRC connection reestablishment request (Re-establishment Request) message.
  • the terminal restores the original RRC configuration and security context from the stored security context, and restores the SRB1 on the terminal side. Afterwards, an RRC connection reestablishment request message is sent to the base station, which is carried by SRB0.
  • the RRC connection reestablishment request message carries radio link failure reason information and terminal identity information.
  • the radio link failure reason information is used for the base station side to generate a corresponding RRC connection re-establishment message
  • the terminal identity information is used for the base station side to perform security context retrieval.
  • the base station restores the original RRC configuration and AS security, and rebuilds the SRB1 resources on the base station side, thereby providing integrity and encryption protection for subsequent uplink and downlink messages. Subsequently, the base station downlinks transmits the RRC connection reconfiguration message to the terminal, restores the DRB and SRB2 resources on the base station side, and sends the RRC connection reconfiguration message, in the order described above.
  • Step 702 The terminal receives an RRC connection re-establishment (Re-establishment) message, and the information carried in the RRC connection re-establishment message is used to instruct to update the AS security key; wherein, the AS security key includes the encryption and decryption encryption of the PDCP layer. key.
  • the RRC connection reestablishment message is AM data of the RLC layer
  • the data link layer on the terminal side needs to feed back an RLC acknowledgement message (ACK), otherwise the base station will retransmit the RRC connection reestablishment message.
  • ACK RLC acknowledgement message
  • Step 703 The terminal starts a complete random access procedure for sending an RLC response message, where the RLC response message is used to indicate the successful reception of the RRC connection reestablishment message.
  • Step 704 The terminal starts a complete random access process for sending an RRC connection reestablishment complete (Re-establishment Complete) message, where the RRC connection reestablishment complete message is used to confirm the successful completion of the RRC connection reestablishment;
  • the RRC connection re-establishment complete message is transmitted on SRB1, integrity and encryption protection is performed at the PDCP layer, and it is mapped to the AM RLC entity at the RLC layer for segmentation processing, and finally is enclosed in the TB after multiplexing at the MAC layer.
  • Upstream transmission is performed by the physical layer.
  • Step 705 the terminal receives an RRC connection reconfiguration (Reconfiguration) message, where the RRC connection reconfiguration message carries a configuration used to modify the RRC connection, restore the DRB and SRB2 resources on the terminal side, and the SR configuration;
  • RRC connection reconfiguration (Reconfiguration) message
  • the PDCP layer may decrypt the RRC connection reconfiguration message according to the updated decryption key.
  • Step 706 The terminal sends a scheduling request to the base station according to the uplink resource information indicated by the SR configuration.
  • Step 707 The terminal receives a scheduling indication message from the base station, where the scheduling indication message is used to authorize uplink resources.
  • Step 708 The terminal sends an RRC connection reconfiguration complete (Reconfiguration Complete) message on the authorized uplink resource, where the RRC connection reconfiguration complete message is used to confirm the successful completion of the RRC connection reconfiguration.
  • RRC connection reconfiguration complete Reconfiguration Complete
  • the base station transmits the RRC connection re-establishment message (step 702 ) and the RRC connection re-configuration message (step 705 ) successively to the terminal.
  • the RRC connection re-establishment signaling is sent on SRB1, and the RRC connection reconfiguration signaling can be sent on SRB1 or SRB3.
  • the RRC connection re-establishment signaling and the RRC connection re-configuration signaling can be generated in a relatively short period of time, in the order described above, and delivered to the lower layer.
  • the above two signalings need to be protected by integrity and encryption, so they will be encrypted at the PDCP layer and encapsulated as RLC SDUs by the AM RLC entity at the RLC layer, and then used as one or segmented as multiple RLC PDU(s) are mapped to the next layer.
  • the MAC layer After the MAC layer receives the above MAC SDUs, it can be multiplexed into the same MAC PDU, waiting to be transmitted by the PHY layer. Therefore, the RRC connection re-establishment message and the RRC connection reconfiguration message may be sent in one TB, or may be sent in adjacent or non-adjacent TBs, and the specific situation is related to the configuration of the base station. Both cases will be discussed in subsequent examples.
  • the terminal initiates a total of three random access processes, which are respectively used for sending RRC Re-establishment Request, RLC ACK and RRC Re-establishment Complete messages.
  • it belongs to contention access, which increases the delay of the re-establishment of the wireless link of the terminal, which is not conducive to the rapid recovery of data services. At the same time, this will also increase the load on the network side and increase the power consumption of the terminal.
  • the RRC connection reconfiguration message received by the terminal carries the SR configuration.
  • the SR configuration is periodic and dedicated to the terminal. Therefore, acquiring uplink resource authorization through SR does not require contention for access, and is a fast and efficient uplink resource request method. Therefore, unnecessary random access procedures are reduced, and the uplink transmission messages (here refers to the RLC response message, the RRC connection re-establishment complete message and the RRC connection reconfiguration complete message) are combined and sent through the uplink resources obtained by the scheduling instruction message, which can speed up the transmission. Re-establishment of wireless links, restoration of the network.
  • the reducing unnecessary random access procedures includes but is not limited to not initiating random access procedures and interrupting the initiated random access procedures.
  • the base station downlink transmits the RRC connection re-establishment message and the RRC connection re-configuration message, which may be in one TB, or in adjacent or non-adjacent TBs, and the cases are shown in Figure 8 and Figure 9 respectively. discuss.
  • FIG. 8 which is a schematic flowchart of a terminal reestablishing a wireless link according to an embodiment of the present application
  • the base station downlinks an RRC connection reestablishment message and an RRC connection reconfiguration message to the terminal in the same transport block (TB).
  • the dashed box represents the random access procedure, wherein the message content of Msg 3 is the message on the arrow in the dashed box.
  • Step 801 The terminal starts a complete random access procedure for transmitting an RRC connection reestablishment request message to the base station.
  • Step 802 The terminal receives the TB sent by the base station, where the TB includes an RRC connection re-establishment message and an RRC connection reconfiguration message, wherein the RRC connection reconfiguration message carries SR configuration information.
  • Step 803 The terminal sends a scheduling request to the base station according to the uplink resource information indicated by the SR configuration.
  • Step 804 The terminal receives a scheduling indication message from the base station, where the scheduling indication message is used to authorize uplink resources.
  • Step 805 The terminal sends an RLC response message, an RRC connection reestablishment complete message and an RRC connection reconfiguration complete message on the authorized uplink resources; wherein the RLC response message is used to indicate the successful reception of the RRC connection reestablishment message, and the RRC connection The reestablishment complete message is used to confirm the successful completion of the RRC connection reconfiguration, and the RRC connection reconfiguration complete message is used to confirm the successful completion of the RRC connection reconfiguration.
  • the data link layer of the terminal processes the TB, and delivers the two messages upward, in the same sequence as described above. Since the RRC connection re-establishment message is an AM message, the terminal should send an RLC response message to confirm the successful reception of the RRC connection re-establishment message. However, the terminal delays sending the RLC response message.
  • the implementation method includes controlling at the data link layer, and the controlled behavior includes delaying generating or sending the RLC response message.
  • the messages demultiplexed by the terminal should also follow the sequence: the RRC connection re-establishment message comes first, and the RRC connection reconfiguration message comes after. Therefore, the RRC layer will first obtain the RRC connection re-establishment signaling. After processing this signaling, the terminal delays sending the RRC connection reestablishment complete message.
  • the implementation methods include, but are not limited to, the RRC layer delays submitting the RRC connection reestablishment complete control signaling, and the data link layer delays sending the RRC connection reestablishment complete message;
  • the deferred delivery behavior includes deferred generation of the RRC connection re-establishment completion signaling.
  • the subsequent RRC connection reconfiguration message is decrypted by the PDCP layer and then delivered to the RRC layer to update the SR configuration of the terminal, so that the terminal can efficiently apply for uplink resource authorization from the base station.
  • the RRC layer respectively generates and delivers the RRC connection re-establishment completion signaling and the RRC connection reconfiguration completion signaling to the lower layer, and the sequence is as described above.
  • the RLC layer also generates an RLC Reply message, which is waiting for transmission along with the aforementioned two signalings.
  • the MAC layer specifies the total size of the RLC PDU to the RLC layer according to the new authorized uplink resources.
  • the RLC layer performs segmentation processing on the two signalings to be sent according to the total size of the RLC PDU, that is, one signaling can correspond to multiple RLC PDUs.
  • These RLC PDUs are respectively added with information headers, and multiplexed into one or more TBs for uploading to the base station. Wherein, in the case of multi-TB transmission, the terminal does not need to acquire a new uplink resource grant during this period.
  • the terminal controls the generation of the RLC response message and the RRC re-establishment complete message, so that the terminal uses an uplink resource grant together with the sending of the RRC re-configuration complete message, which reduces the total number of uplink grant applications to the base station, especially The number of times that the terminal must obtain authorization through the random access procedure when sending the RLC response message and the RRC reestablishment complete message is subtracted, which reduces time-consuming and efficiently restores the wireless link connection.
  • the embodiment of the present application sends the three messages to be uploaded through the same uplink resource grant, wherein the uplink resource grant is further obtained through the SR configuration carried in the existing RRC reconfiguration message. Therefore, the embodiment of the present application simplifies the wireless link reconstruction process, greatly saves the time-consuming of link reconstruction, and reduces the occupation of uplink resources and the network side of the base station.
  • the embodiment shown in FIG. 9 is a case where the RRC connection reestablishment message and the RRC connection reconfiguration message are sent in different TBs.
  • the base station downlink transmits the RRC connection reestablishment message and the RRC connection reconfiguration message in different TBs.
  • the TB including the RRC connection reconfiguration message is called the first TB
  • the TB including the RRC connection reconfiguration message is called the second TB. Due to the instability of the wireless transmission environment and the situation that the base station initiates retransmission, the sequence of TBs received by the terminal may be wrong, that is, the second TB may arrive at the terminal before the first TB. It should be understood that the steps in the flowchart represent only one instance.
  • the dashed box represents the random access procedure, wherein the message content of Msg 3 is the message on the arrow in the dashed box. Specific steps are as follows:
  • Step 901 The terminal starts a complete random access procedure for sending an RRC connection reestablishment request message.
  • Step 902 the terminal receives the RRC connection re-establishment message.
  • Step 903 The terminal receives an RRC connection reconfiguration message, wherein the RRC connection reconfiguration message carries SR configuration information.
  • Step 904 The terminal sends a scheduling request to the base station according to the uplink resource information indicated by the SR configuration.
  • Step 905 The terminal receives a scheduling indication message from the base station, where the scheduling indication message is used to authorize uplink resources.
  • Step 906 The terminal sends an RLC response message, an RRC connection reestablishment complete message and an RRC connection reconfiguration complete message on the authorized uplink resource.
  • the data link layer demultiplexes the RLC SDU containing the RRC connection reconfiguration signaling.
  • the PDCP layer delivers on demand, it can be distinguished
  • the signaling arrives prior to the RRC connection re-establishment signaling.
  • the PDCP layer buffers the RRC connection reconfiguration signaling and waits for the RRC connection reestablishment signaling.
  • the RRC connection reconfiguration signaling carries the indication information of the AS key update, the decryption key of the PDCP layer is not updated, and the RRC connection reconfiguration signaling cannot be decrypted and handed over. Therefore, on the terminal side, the sequence of control signaling submitted by the data link layer to the network layer must be, first, the RRC connection re-establishment signaling, and then the RRC connection reconfiguration signaling.
  • the terminal delays sending the RLC ACK and the RRC connection reestablishment complete message, and therefore does not initiate the random access procedure to apply for uplink resource authorization.
  • the terminal waits for the uplink resource grant carried in the RRC reconfiguration message for integrated transmission of the following messages: RLC response message, RRC connection reestablishment complete message and RRC connection reconfiguration complete message.
  • the arrival time of the second TB is unknown.
  • the waiting time T can be set to prevent the base station from not receiving The RLC ACK is repeated and the RRC connection re-establishment message is repeatedly downloaded, resulting in a waste of network resources.
  • the waiting time T is used to indicate the time for the terminal to delay initiating the random access procedure, that is, the time for suspending sending the random access preamble to the base station, and T may be a fixed parameter or an adjustable parameter.
  • T is a fixed parameter, it is pre-stored on the terminal side, and the specific value can be set according to factors such as user services.
  • the RRC layer informs the data link layer downward to indicate that the layer is receiving
  • the RLC response message is generated or transmitted with a maximum delay of T time, and the delay data link layer initiates a random access procedure to the base station.
  • the RRC layer also submits the RRC connection re-establishment completion signaling to the data link layer with a maximum delay of T time.
  • T is an adjustable parameter
  • its calculation method is based on various factors, including but not limited to terminal requirements, business requirements, priorities, and the like.
  • the terminal If the terminal does not receive the RRC reconfiguration message within T time, it initiates a random access procedure to the base station to apply for uplink resource authorization, and is used to send an RLC response message and an RRC connection reestablishment complete message.
  • the terminal can delay the sending of the RLC response message and the RRC connection reestablishment complete message, wait for the SR configuration in the RRC connection reconfiguration message, and then apply for uplink scheduling and obtain uplink authorization resources.
  • the purpose of reducing the number of initiations of the random access procedure is achieved.
  • the RLC response message, the RRC reestablishment complete message and the RRC reconfiguration complete message are efficiently combined and sent, thereby reducing the reestablishment delay of the radio link.
  • FIG. 10 is another schematic flowchart of reestablishing a wireless link provided by an embodiment of the present application.
  • the dashed box represents the random access process, and the message content of Msg 3 is the message on the arrow in the dashed box.
  • the process includes the following steps:
  • Step 1001 The terminal starts a complete random access procedure for sending an RRC connection reestablishment request message.
  • Step 1002 the terminal receives the RRC connection reestablishment message.
  • Step 1003 the terminal sends a random access preamble.
  • Step 1004 The terminal receives an RRC connection reconfiguration message, wherein the RRC connection reconfiguration message carries SR configuration information.
  • Step 1005 The terminal sends a scheduling request to the base station according to the uplink resource information indicated by the SR configuration.
  • Step 1006 The terminal receives a scheduling indication message from the base station, where the scheduling indication message is used to authorize uplink resources.
  • Step 1007 the terminal sends an RLC response message, an RRC connection reestablishment complete message and an RRC connection reconfiguration complete message on the authorized uplink resource.
  • step 1003 the terminal intends to apply to the base station for uplink resource authorization through a complete random access process to send an RLC response message.
  • step 1003 the terminal sends the random access preamble, which is the first step to start a complete random access process, and the base station should send a random access response after receiving it, which carries the uplink resource authorization to instruct the terminal to configure the uplink resource. information. Since this response behavior is only a response from the base station side to the received random access preamble, it is not informed of the corresponding upload content. Therefore, the base station may have sent an RRC connection reconfiguration message to the terminal before sending the random access response.
  • the terminal first receives the RRC connection reconfiguration message and then receives the random access response, and the RRC layer updates the SR configuration carried in the RRC connection reconfiguration message to the lower layer. Accordingly, the terminal interrupts the random access procedure and sends a scheduling request to the base station using the SR configuration.
  • the RRC layer first transmits down the RRC connection re-establishment completion signaling, and then transmits the RRC connection reconfiguration completion signaling.
  • the data link layer finally sends the following messages using the uplink resources granted in the scheduling indication message: RLC response message, RRC connection reestablishment complete message and RRC connection reconfiguration complete message.
  • the terminal sends the RLC response message using the uplink resources of the random access application, and starts the random access procedure again, and the authorized uplink resources are used to send the RRC connection re-establishment completed. message, and finally use the uplink grant in the scheduling indication message to send the RRC connection reconfiguration complete message.
  • step 1003 is not a necessary step, but is only one of possible situations.
  • the terminal After receiving the RRC connection reconfiguration message, the terminal immediately interrupts the random access process, including but not limited to suspending the generation of the random access preamble, stopping the sending of the random access preamble, discarding the random access response, etc. The behavior occurs at the data link layer and the physical layer. Subsequently, the terminal validates the uplink resource grant in the scheduling instruction message, and sends an RLC response message, an RRC connection reestablishment complete message, and an RRC connection reconfiguration complete message.
  • the terminal does not guarantee the integrity of the random access process, so that it can be interrupted, thereby efficiently integrating and sending the above three messages. Since the single TB uplink resource authorization obtained through random access is determined by the base station, the content size it can carry is not as good as the uplink resource authorization obtained by the scheduling request, which allows multiple TB uploads and is efficient, so the latter is more suitable for the RRC reconstruction process.
  • the coordinated sending of the above three messages The terminal responds to the RRC connection reconfiguration message in a timely manner, interrupts the ongoing random access process, and takes effect of the SR configuration in the RRC connection reconfiguration message, which makes the transmission of the above three messages more efficient and reduces the delay of wireless link reconstruction.
  • the communication apparatus 1100 includes a processing unit 1110 and a transceiver unit 1120 .
  • the wireless communication device is used to implement each step of the corresponding terminal in the foregoing embodiments:
  • the processing unit 1110 is used to control the transceiver unit 1120 .
  • the transceiver unit 1120 is configured to send an RRC connection re-establishment request message, where the RRC connection re-establishment request message is used to request to re-establish an RRC connection; and receive an RRC connection re-establishment message from the base station, where the RRC connection re-establishment message is used to respond to the RRC connection Reestablishment request message; receive an RRC connection reconfiguration message from the base station, wherein the RRC connection reconfiguration message carries the resource indication information of the scheduling request; receive scheduling indication information from the base station, the scheduling indication information Used to authorize uplink resources; send RLC response message, RRC connection reestablishment complete message and RRC connection reconfiguration complete message.
  • the RLC response message is used to confirm the reception of the RRC connection re-establishment message
  • the RRC connection re-establishment complete message is used to confirm the completion of the RRC connection re-establishment
  • the RRC connection re-configuration complete message is used to confirm the RRC connection re-configuration of completion.
  • the processing unit 1110 is further configured to suspend the sending of the random access preamble by the transceiver unit 1120 after receiving the RRC connection reestablishment message. Wherein, the RRC connection reconfiguration message has been received during the suspension of sending the random access preamble to the base station.
  • the processing unit 1110 is configured to configure the time period for which the transceiver unit 1120 suspends sending the random access preamble.
  • the duration configured by the processing unit 1110 to suspend sending the random access preamble includes any one of the following: one transmission time interval TTI, two TTIs, or three TTIs.
  • the transceiver unit 1120 is further configured to send a random access preamble after receiving the RRC connection reestablishment message. Wherein, before receiving the response message of the random access preamble, the RRC connection reconfiguration message has been received.
  • the processing unit 1110 is further configured to terminate the subsequent process of the random access preamble in advance after the transceiver unit 1120 receives the RRC connection reconfiguration message.
  • the transceiver unit 1120 may also be divided into a receiving unit and a transmitting unit, each of which has the functions of receiving and transmitting, which is not limited here.
  • the above-mentioned communication device may further include a storage unit, which is used to store data or instructions (also referred to as codes or programs), and each of the above-mentioned units may interact or be coupled with the storage unit to implement corresponding methods or functions.
  • the coupling in the embodiments of the present application refers to indirect coupling or communication connection between devices, units or modules, which may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • the division of units in the communication device is only a division of logical functions, and in actual implementation, all or part of them may be integrated into one physical entity, or may be physically separated.
  • the units in the communication device can all be implemented in the form of software calling through the processing element; also all can be implemented in the form of hardware; some units can also be implemented in the form of software calling through the processing element, and some units can be implemented in the form of hardware.
  • each unit may be a separately established processing element, or may be integrated in a certain chip of the communication device to realize, in addition, it may also be stored in the memory in the form of a program, which can be called and executed by a certain processing element of the communication device. function of the unit.
  • each step of the above method or each of the above units may be implemented by an integrated logic circuit of hardware in the processor element or implemented in the form of software being invoked by the processing element.
  • a unit in any of the above communication devices may be one or more integrated circuits configured to implement the above method, such as: one or more application specific integrated circuits (ASICs), or, an or multiple microprocessors (digital singnal processors, DSP), or, one or more field programmable gate arrays (FPGA), or a combination of at least two of these integrated circuit forms.
  • ASICs application specific integrated circuits
  • DSP digital singnal processors
  • FPGA field programmable gate arrays
  • a unit in the communication device can be implemented in the form of a processing element scheduler
  • the processing element can be a general-purpose processor, such as a central processing unit (CPU) or other processors that can invoke programs.
  • CPU central processing unit
  • these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).
  • the wireless communication device may be a wireless communication device or a network device, or a chip or a circuit, such as a chip or a circuit that may be provided in the wireless communication device.
  • a circuit for example, a chip or a circuit that can be set in a network device, is used to implement the methods in the above method embodiments.
  • the communication apparatus 1200 includes: a processor 1210 and a transceiver 1230 , and optionally, the communication apparatus 1200 further includes a memory 1220 , which is indicated by a dotted box in the figure as optional.
  • the transceiver 1230 is used to enable communication with other devices.
  • the communication apparatus 1200 may further include a bus system, wherein the processor 1210, the memory 1220, and the transceiver 1230 may be connected through the bus system.
  • the above-mentioned processor 1210 may be a chip.
  • the processor 1302 may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), or a system on chip (SoC). It can be a central processing unit (CPU), a network processor (NP), a digital signal processing circuit (DSP), or a microcontroller (microcontroller). unit, MCU), it can also be a programmable logic device (PLD) or other integrated chips.
  • FPGA field programmable gate array
  • ASIC application specific integrated circuit
  • SoC system on chip
  • SoC system on chip
  • SoC system on chip
  • MCU microcontroller
  • MCU programmable logic device
  • PLD programmable logic device
  • each step of the above-mentioned method may be completed by an integrated logic circuit of hardware in the processor 1210 or an instruction in the form of software.
  • the steps of the methods disclosed in combination with the embodiments of the present application may be directly embodied as being executed by a hardware processor, or executed by a combination of hardware and software modules in the processor 1210 .
  • the software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art.
  • the storage medium is located in the memory 1220, and the processor 1210 reads the information in the memory 1220, and completes the steps of the above method in combination with its hardware.
  • the function/implementation process of the transceiver unit 1120 in FIG. 11 can be implemented by the processor 1210 in the communication apparatus 1200 shown in FIG. 12 calling the computer-executable instructions stored in the memory 1220 .
  • the function/implementation process of the transceiving unit 1120 in FIG. 11 may be implemented by the transceiver 1230 in the communication apparatus 1200 shown in FIG. 12 .
  • processor 1210 in this embodiment of the present application may be an integrated circuit chip, which has a signal processing capability.
  • each step of the above method embodiments may be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software.
  • the aforementioned processors may be general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components .
  • DSPs digital signal processors
  • ASICs application specific integrated circuits
  • FPGAs field programmable gate arrays
  • the methods, steps, and logic block diagrams disclosed in the embodiments of this application can be implemented or executed.
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
  • the software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art.
  • the storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.
  • the memory 1220 may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memory.
  • the non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically programmable Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • Volatile memory may be random access memory (RAM), which acts as an external cache.
  • RAM random access memory
  • DRAM dynamic random access memory
  • SDRAM synchronous DRAM
  • SDRAM double data rate synchronous dynamic random access memory
  • ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM synchronous link dynamic random access memory
  • direct rambus RAM direct rambus RAM
  • the communication apparatus may include a processor 1210 , a transceiver 1230 and a memory 1220 .
  • the memory 1220 is used for storing instructions
  • the processor 1210 is used for executing the instructions stored in the memory 1220, which can implement the execution by the wireless communication device in any one or any of the corresponding methods shown in FIG. 8 to FIG. 9 above. A step of. .
  • At least one item (single, species) of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or multiple.
  • “Plurality" means two or more, and other quantifiers are similar.
  • the size of the sequence numbers of the above-mentioned processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, and should not be dealt with in the embodiments of the present application. implementation constitutes any limitation.
  • the technical solutions provided in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software When implemented in software, it can be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, a terminal device, a network device, an artificial intelligence device, or other programmable devices.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server, or data center is by wire (eg, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that a computer can access, or a data storage device such as a server, a data center, or the like that includes an integration of one or more available media.
  • the usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, DVDs), or semiconductor media (eg, solid state disks (SSDs)), and the like.
  • various embodiments may refer to each other.
  • methods and/or terms between method embodiments may refer to each other.
  • functions and/or terms between device embodiments may refer to each other.
  • device embodiments may refer to each other.
  • Functional and/or terminology between embodiments and method embodiments may refer to each other.

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  • Mobile Radio Communication Systems (AREA)

Abstract

La présente demande concerne un procédé et un appareil de rétablissement de liaison radio. Le procédé comprend les étapes suivantes : un dispositif terminal envoie un message de demande de rétablissement de connexion de commande de ressource radio (RRC) à une station de base ; reçoit un message de rétablissement de connexion RRC en provenance de la station de base, le message de rétablissement de connexion RRC étant utilisé pour répondre au message de demande de rétablissement de connexion RRC ; reçoit un message de reconfiguration de connexion RRC en provenance de la station de base, le message de reconfiguration de connexion RRC contenant des informations d'indication de ressource d'une demande de planification ; envoie la demande de planification à la station de base selon les informations d'indication de ressource, et reçoit un message d'indication de planification, le message d'indication de planification étant utilisé pour attribuer une ressource de liaison montante ; et envoie, à la station de base, un message de réponse de commande de liaison radio (RLC), un message d'achèvement de rétablissement de connexion RRC et un message d'achèvement de reconfiguration de connexion RRC en utilisant la ressource de liaison montante attribuée, le message de réponse RLC étant utilisé pour confirmer la réception du message de rétablissement de connexion RRC, le message d'achèvement de rétablissement de connexion RRC étant utilisé pour confirmer l'achèvement d'un rétablissement de connexion RRC, et le message d'achèvement de reconfiguration de connexion RRC étant utilisé pour confirmer l'achèvement d'une reconfiguration de connexion RRC.
PCT/CN2021/076449 2021-02-10 2021-02-10 Procédé et appareil de rétablissement de liaison radio WO2022170545A1 (fr)

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CN202180004632.3A CN115211220A (zh) 2021-02-10 2021-02-10 一种无线链路的重建方法和装置

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