WO2021170110A1 - Procédé et appareil de communication - Google Patents

Procédé et appareil de communication Download PDF

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Publication number
WO2021170110A1
WO2021170110A1 PCT/CN2021/078247 CN2021078247W WO2021170110A1 WO 2021170110 A1 WO2021170110 A1 WO 2021170110A1 CN 2021078247 W CN2021078247 W CN 2021078247W WO 2021170110 A1 WO2021170110 A1 WO 2021170110A1
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WO
WIPO (PCT)
Prior art keywords
terminal device
sul
network device
carrier
message
Prior art date
Application number
PCT/CN2021/078247
Other languages
English (en)
Chinese (zh)
Inventor
酉春华
徐小英
曾清海
Original Assignee
华为技术有限公司
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Filing date
Publication date
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Publication of WO2021170110A1 publication Critical patent/WO2021170110A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
    • 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

Definitions

  • This application relates to the field of wireless communication technology, and in particular to a communication method and device.
  • the network device can establish a corresponding context for the terminal device (context).
  • a terminal device transitions from a radio resource control (radio resource control, RRC) connected state to an RRC idle state, the network device releases the context of the terminal device.
  • RRC radio resource control
  • an inactive state is introduced for the RRC state of the terminal device. The terminal equipment in the inactive state can maintain the connection with the core network, but release the RRC connection with the access network, without performing operations such as cell handover and radio link monitoring.
  • a supplementary uplink (SUL) carrier is introduced . Since the SUL carrier is usually configured with a lower frequency band, the coverage range of the SUL carrier is relatively large.
  • This application provides a communication method and device to implement uplink transmission on SUL carriers for terminal equipment in an inactive state.
  • the embodiments of the present application provide a communication method, which may be applied to a first network device, or may also be applied to a chip inside the first network device.
  • the first network device may send a first message to the second network device, and the first message includes the terminal device
  • the SUL capability information is used to indicate that the terminal device supports the SUL carrier; where the first network device and the second network device are located in the RAN notification area of the terminal device.
  • the second network device can learn the SUL capability of the terminal device; further, the second network device can be based on the SUL capability of the terminal device.
  • the capability information instructs the terminal equipment to perform uplink transmission on the SUL carrier, thereby making it possible for the terminal equipment in the inactive state to perform uplink transmission on the SUL carrier.
  • the SUL capability information includes a list of SUL frequency bands supported by the terminal device, and the SUL frequency band list includes the identification of one or more SUL frequency bands; or, the SUL capability information includes at least one combination of SUL frequency bands supported by the terminal device.
  • a combination of SUL frequency bands includes an identifier of a normal uplink NUL frequency band and an identifier of the SUL frequency band associated with the NUL.
  • the first message further includes: bandwidth information supported by the SUL frequency band; and/or subcarrier spacing supported by the SUL frequency band.
  • the first message is used to notify the second network device to page the terminal device.
  • the embodiments of the present application provide a communication method, which can be applied to a second network device, or can also be applied to a chip inside the second network device. Take this method applied to a second network device as an example.
  • the second network device receives a first message from the first network device.
  • the first message includes the SUL capability information of the terminal device, and the SUL capability information is used to indicate the terminal
  • the device supports SUL carrier; further, the second network device can send a second message according to the SUL capability information of the terminal device, the second message is used to page the terminal device; wherein, the first network device and the second network device are located in the RAN of the terminal device Notification area.
  • the SUL capability information includes a list of SUL frequency bands supported by the terminal device, and the SUL frequency band list includes the identification of one or more SUL frequency bands; or, the SUL capability information includes at least one combination of SUL frequency bands supported by the terminal device.
  • a combination of SUL frequency bands includes an identifier of a normal uplink NUL frequency band and an identifier of the SUL frequency band supported by the NUL.
  • the first message further includes: bandwidth information supported by the SUL frequency band; and/or subcarrier spacing supported by the SUL frequency band.
  • the second message includes first indication information, and the first indication information is used to instruct the terminal equipment to perform uplink transmission on the first carrier; where the first carrier is a SUL carrier or a NUL carrier.
  • the second network device determines whether the terminal device performs uplink transmission on the SUL carrier or performs uplink transmission on the NUL carrier, so that the flexibility of network device regulation is higher.
  • the second message further includes second indication information, and the second indication information is used to indicate resources used for uplink transmission on the first carrier.
  • the second indication information is carried in the second message without the need to additionally send the second indication information, which can effectively save signaling overhead.
  • the method further includes: the second network device sends a third message to the terminal device, the third message includes second indication information, and the second indication information is used to indicate the information used for uplink transmission on the first carrier. resource.
  • the second message further includes third indication information, and the third indication information is used to instruct the terminal device to receive the third message.
  • the second indication information includes an index of a resource used for uplink transmission on the first carrier.
  • the second message includes fourth indication information, and the fourth indication information is used to indicate resources used for uplink transmission on the SUL carrier and resources used for uplink transmission on the NUL carrier.
  • the second network device instructs the terminal device to both the resources used for uplink transmission on the SUL carrier and the resources used for uplink transmission on the NUL carrier, and the terminal device can then determine whether to perform on the SUL carrier or the NUL carrier. Uplink transmission.
  • the resources used for uplink transmission include any of the following: random access resources, where the random access resources include random access preambles, or, the random access resources include random access preambles and PUSCH Resources; configure authorized resources.
  • the embodiments of the present application provide a communication method, which can be applied to a terminal device, or can also be applied to a chip inside the terminal device.
  • the terminal device releases the RRC connection with the first network device and enters the inactive state; and, the terminal device receives the second message from the second network device.
  • the second message is used to page the terminal device;
  • the second message is sent according to the first message from the first network device, the first message includes the SUL capability information of the terminal device, and the SUL capability information is used to indicate that the terminal device supports the SUL carrier ;
  • the first network device and the second network device are located in the RAN notification area of the terminal device.
  • the SUL capability information includes a list of SUL frequency bands supported by the terminal device, and the SUL frequency band list includes the identification of one or more SUL frequency bands; or, the SUL capability information includes at least one combination of SUL frequency bands supported by the terminal device.
  • a combination of SUL frequency bands includes an identifier of a normal uplink NUL frequency band and an identifier of the SUL frequency band supported by the NUL.
  • the first message further includes: bandwidth information supported by the SUL frequency band; and/or subcarrier spacing supported by the SUL frequency band.
  • the second message includes first indication information, and the first indication information is used to instruct the terminal device to perform uplink transmission on the first carrier; the method further includes: the terminal device determines that the first carrier is used for uplink Transmission resources, and use the resources for uplink transmission; wherein, the first carrier is a SUL carrier or a NUL carrier.
  • the terminal device determining the resources used for uplink transmission on the first carrier includes: the second message further includes second indication information, and the second indication information is used to indicate the resources used for uplink transmission on the first carrier. Resource; the terminal device determines the resource for uplink transmission according to the second indication information.
  • the terminal device determining the resources used for uplink transmission on the first carrier includes: the terminal device receives a third message from the second network device, the third message includes the second indication information, and the second indication information It is used to indicate the resources used for uplink transmission on the first carrier; the terminal device determines the resources used for uplink transmission according to the second indication information.
  • the second message further includes third indication information, and the third indication information is used to instruct the terminal device to receive the third message.
  • the second indication information includes an index of a resource used for uplink transmission on the first carrier.
  • the terminal device determines the resource for uplink transmission according to the second indication information, including: the terminal device receives a fourth message from the second network device, and the fourth message includes the uplink transmission on the first carrier.
  • the second message includes fourth indication information, and the fourth indication information is used to indicate resources used for uplink transmission on the SUL carrier and resources used for uplink transmission on the NUL carrier; the method further includes: a terminal The device obtains the downlink measurement value, and the downlink measurement value is the measurement value in the downlink direction between the terminal device and the second network device; if the downlink measurement value is less than the preset threshold, the terminal device uses the resources for uplink transmission on the SUL carrier to perform Uplink transmission.
  • the method further includes: if the downlink measurement value is greater than or equal to the preset threshold, the terminal device uses the resources for uplink transmission on the NUL carrier for uplink transmission.
  • the resources used for uplink transmission include any of the following: random access resources, where the random access resources include random access preambles, or, the random access resources include random access preambles and PUSCH Resources; configure authorized resources.
  • an embodiment of the present application provides a communication method, which may be applied to a first network device, or may also be applied to a chip inside the first network device.
  • the first network device obtains the cell information of the second network device from the second network device, and the information includes the uplink carrier information of the cell;
  • the uplink carrier information and the SUL capability information of the terminal equipment are added to the RNA of the terminal equipment, or indication information is sent to the second network, and the indication information is used to indicate that the terminal equipment supports the SUL carrier of the cell.
  • the first network device fully considers the SUL capability of the terminal device when configuring RNA for the terminal device. For example, if the terminal device supports the SUL carrier, the first network device can add the cell that supports the SUL carrier to the terminal device. Therefore, it is possible for the subsequent terminal equipment to perform uplink transmission on the SUL carrier of the cell.
  • the first network device determines whether to send instruction information to the second network device based on the uplink carrier information of the cell of the second network device and the SUL capability information of the terminal device; for example, if the first network device determines that the terminal device If the SUL carrier of the cell is supported, indication information can be sent to the second network so that the second network device knows that the terminal device supports the SUL carrier of the cell, thereby providing the possibility for the terminal device to perform uplink transmission on the SUL carrier of the cell .
  • the method further includes: the first network device sends a request message to the second network device, and the request message is used to request information about the cell of the second network device.
  • the embodiments of the present application provide a communication method, which can be applied to a second network device, or can also be applied to a chip inside the second network device.
  • the second network device receives a request message from the first network device, and the request message is used to request information about the cell of the second network device; the second network device responds to the request
  • the message is cell information sent to the first network device, and the cell information includes uplink carrier information of the cell.
  • the method further includes: the second network device receives a RAN paging message from the first network device, the RAN paging message is used to notify the second network device to page the terminal device, and the paging message includes indication information , The indication information is used to indicate that the terminal device supports the SUL carrier of the cell; the second network device sends a paging message to the terminal device according to the RAN paging message.
  • the paging message includes first indication information, the first indication information is used to instruct the terminal equipment to perform uplink transmission on the first carrier; where the first carrier is the SUL carrier of the cell or the NUL carrier of the cell .
  • the paging message further includes second indication information, and the second indication information is used to indicate resources used for uplink transmission on the first carrier.
  • the paging message includes third indication information, and the third indication information is used to indicate resources used for uplink transmission on the SUL carrier and resources used for uplink transmission on the NUL carrier.
  • the resources used for uplink transmission include any of the following: random access resources, where the random access resources include random access preambles, or, the random access resources include random access preambles and PUSCH Resources; configure authorized resources.
  • the embodiments of the present application provide a communication method, which may be applied to a network device, or may also be applied to a chip inside the network device.
  • the network device determines the SUL carrier of the cell in which the terminal device supports the network device, and the terminal device is in an inactive state; the network device allocates a first resource to the terminal device, and the first resource includes : Resources used for uplink transmission on the SUL carrier of the cell, and/or resources used for uplink transmission on the NUL carrier of the cell; the network device sends first indication information to the terminal device, and the first indication information is used to indicate the first resource .
  • the network device indicates the first resource to the terminal device in the inactive state, so that the terminal device can realize the uplink transmission in time according to the first resource.
  • the network device sending the first indication information to the terminal device includes: the network device sends a paging message, and the paging message includes the first indication information.
  • the network device sends the first indication information to the terminal device, including:
  • the network device sends a first message to the terminal device, where the first message includes the first indication information.
  • the method further includes: the network device sends a paging message, the paging message includes second indication information, and the second indication information is used to instruct the terminal device to receive the first message.
  • the first indication information includes the index of the first resource.
  • the network device determining the SUL carrier of the cell supported by the terminal device includes: the network device obtains the SUL capability information of the terminal device; the network device determines the SUL carrier of the cell supported by the terminal device according to the SUL capability information.
  • the embodiments of the present application provide a communication method, which may be applied to a terminal device, or may also be applied to a chip inside the terminal device. Take the application of this method to a terminal device as an example.
  • the terminal device receives first indication information from the network device.
  • the first indication information is used to indicate a first resource.
  • the first resource includes: the SUL carrier of the cell of the network device.
  • the transmitted resources are transmitted upstream.
  • the terminal device receiving the first indication information from the network device includes:
  • the terminal device receives a paging message from the network device, and the paging message includes the first indication information.
  • the terminal device receiving the first indication information from the network device includes:
  • the terminal device receives the first message from the network device, where the first message includes the first indication information.
  • the method also includes:
  • the terminal device receives a paging message from the network device, the paging message includes second indication information, and the second indication information is used to instruct the terminal device to receive the first message.
  • the first indication information includes the index of the first resource.
  • the first resource includes: resources used for uplink transmission on the SUL carrier and resources used for uplink transmission on the NUL carrier; the terminal device uses the first resource for uplink transmission, including: the terminal device obtains downlink measurements The downlink measurement value is the measurement value in the downlink direction between the terminal device and the network device; if the downlink measurement value is less than the preset threshold, the terminal device uses the resources for uplink transmission on the SUL carrier for uplink transmission.
  • the method further includes: if the downlink measurement value is greater than or equal to the preset threshold, the terminal device uses the resources for uplink transmission on the NUL carrier for uplink transmission.
  • the present application provides a communication device.
  • the communication device may be a terminal device or a chip set inside the terminal device.
  • the communication device has the function of implementing the third aspect or the seventh aspect.
  • the communication device includes a module or unit or means corresponding to the steps involved in the third aspect or the seventh aspect.
  • the function Or the unit or means can be realized by software, or by hardware, and can also be realized by hardware executing corresponding software.
  • the communication device includes a processing unit and a communication unit.
  • the communication unit can be used to send and receive signals to achieve communication between the communication device and other devices.
  • the communication unit is used to receive Configuration information of the network device; the processing unit can be used to perform some internal operations of the communication device.
  • the functions performed by the processing unit and the communication unit may correspond to the steps involved in the third aspect or the seventh aspect described above.
  • the communication device includes a processor, and may also include a transceiver.
  • the transceiver is used to send and receive signals, and the processor executes program instructions to complete any of the above-mentioned third aspect or seventh aspect.
  • the communication device may further include one or more memories, and the memories are used for coupling with the processor.
  • the one or more memories may be integrated with the processor, or may be provided separately from the processor, which is not limited in this application.
  • the memory may store necessary computer programs or instructions to realize the functions related to the third aspect or the seventh aspect.
  • the processor can execute the computer program or instruction stored in the memory, and when the computer program or instruction is executed, the communication device realizes any of the possible designs or implementations of the third aspect or the seventh aspect. method.
  • the communication device includes a processor and a memory, and the memory can store necessary computer programs or instructions for realizing the functions involved in the third aspect or the seventh aspect.
  • the processor can execute the computer program or instruction stored in the memory, and when the computer program or instruction is executed, the communication device realizes any of the possible designs or implementations of the third aspect or the seventh aspect. method.
  • the communication device includes at least one processor and an interface circuit, where at least one processor is used to communicate with other devices through the interface circuit, and execute any possibility of the third aspect or the seventh aspect.
  • the present application provides a communication device.
  • the communication device may be a network device or a chip set inside the network device.
  • the communication device is capable of implementing the functions related to the first, second, fourth, fifth, and sixth aspects described above.
  • the communication device includes performing the first, second, and fourth aspects described above.
  • the fifth and sixth aspects relate to modules or units or means corresponding to the steps.
  • the functions or units or means can be realized by software, or by hardware, or by hardware executing corresponding software.
  • the communication device includes a processing unit and a communication unit.
  • the communication unit can be used to send and receive signals to achieve communication between the communication device and other devices.
  • the communication unit is used to communicate with the terminal.
  • the device sends system information; the processing unit can be used to perform some internal operations of the communication device.
  • the functions performed by the processing unit and the communication unit may correspond to the steps involved in the first, second, fourth, fifth, and sixth aspects described above.
  • the communication device includes a processor, and may also include a transceiver.
  • the transceiver is used to send and receive signals.
  • the processor executes program instructions to complete the first, second, and first aspects.
  • the method in any possible design or implementation of the fourth aspect, the fifth aspect, and the sixth aspect.
  • the communication device may further include one or more memories, and the memories are used for coupling with the processor.
  • the one or more memories may be integrated with the processor, or may be provided separately from the processor, which is not limited in this application.
  • the memory can store necessary computer programs or instructions to realize the functions involved in the first, second, fourth, fifth, and sixth aspects described above.
  • the processor can execute the computer program or instruction stored in the memory, and when the computer program or instruction is executed, the communication device realizes the above-mentioned first aspect, second aspect, fourth aspect, fifth aspect, The sixth aspect is any possible design or implementation method.
  • the communication device includes a processor and a memory, and the memory can store necessary computer programs or computer programs to realize the functions involved in the first, second, fourth, fifth, and sixth aspects. instruction.
  • the processor can execute the computer program or instruction stored in the memory, and when the computer program or instruction is executed, the communication device realizes the above-mentioned first aspect, second aspect, fourth aspect, fifth aspect,
  • the sixth aspect is any possible design or implementation method.
  • the communication device includes at least one processor and an interface circuit, where at least one processor is used to communicate with other devices through the interface circuit and execute the first, second, and first aspects described above.
  • the method in any possible design or implementation of the fourth aspect, the fifth aspect, and the sixth aspect.
  • the present application provides a communication system.
  • the communication system may include a first network device and a second network device.
  • the first network device may be used to execute any possible design or implementation method of the first aspect.
  • the second network device can be used to execute any possible design or implementation method of the second aspect; optionally, the communication system can also include a terminal device, and the terminal device can be used to execute any possible design or implementation of the third aspect.
  • the communication system may include a first network device and a second network device, where the first network device may be used to execute the method in any possible design or implementation of the fourth aspect, and the second network device may be used to execute the method in the fourth aspect. Any possible design or implementation method in the five aspects.
  • the communication system may include a network device and a terminal device. The network device may be used to implement any possible design or implementation method of the sixth aspect, and the terminal device may be used to implement any possible design or implementation of the seventh aspect. The method in the way.
  • the present application provides a computer-readable storage medium, which stores computer-readable instructions, and when the computer reads and executes the computer-readable instructions, the computer executes the first aspect described above. Any one of the possible design methods of the seventh aspect.
  • this application provides a computer program product, which when a computer reads and executes the computer program product, causes the computer to execute any one of the possible design methods in the first to seventh aspects.
  • the present application provides a chip that includes a processor, and the processor is coupled with a memory, and is configured to read and execute a software program stored in the memory, so as to implement the above-mentioned first aspect to the first aspect. Any of the seven possible design methods.
  • FIG. 1 is a schematic diagram of a possible system architecture to which an embodiment of this application is applicable;
  • FIG. 2 is a schematic diagram of another network architecture to which the embodiments of this application are applicable;
  • FIG. 3 is a schematic diagram of another network architecture to which the embodiments of this application are applicable.
  • Figure 4a is a schematic diagram of a four-step random access process provided by an embodiment of this application.
  • Figure 4b is a schematic diagram of a two-step random access process provided by an embodiment of this application.
  • Fig. 4c is a schematic diagram of a four-step random access process based on non-competition provided by an embodiment of the application;
  • FIG. 5 is a schematic diagram of a flow corresponding to the communication method provided in the first embodiment of the application.
  • FIG. 6 is a schematic diagram of a process corresponding to the communication method provided in the second embodiment of this application.
  • FIG. 7 is a schematic diagram of a process corresponding to the communication method provided in the third embodiment of this application.
  • FIG. 8 is a schematic diagram of a process corresponding to the communication method provided in the fourth embodiment of this application.
  • FIG. 9 is a schematic diagram of determining PRACH time domain resources based on a time offset according to an embodiment of the application.
  • FIG. 10 is a possible exemplary block diagram of a device involved in an embodiment of this application.
  • FIG. 11 is a schematic structural diagram of a terminal device provided by an embodiment of this application.
  • FIG. 12 is a schematic structural diagram of a network device provided by an embodiment of this application.
  • Terminal device It can be a wireless terminal device that can receive network device scheduling and instruction information.
  • a wireless terminal device can be a device that provides voice and/or data connectivity to users, or a handheld device with wireless connection function, or Other processing equipment connected to the wireless modem.
  • a terminal device can communicate with one or more core networks or the Internet via a radio access network (RAN).
  • the terminal device can be a mobile terminal device, such as a mobile phone (or called a "cellular" phone, mobile phone). phone)), computers and data cards, for example, can be portable, pocket-sized, handheld, built-in computer or vehicle-mounted mobile devices, which exchange language and/or data with the wireless access network.
  • Wireless terminal equipment can also be called system, subscriber unit, subscriber station, mobile station, mobile station (MS), remote station (remote station), access point ( access point (AP), remote terminal equipment (remote terminal), access terminal equipment (access terminal), user terminal equipment (user terminal), user agent (user agent), subscriber station (SS), user terminal equipment (customer premises equipment, CPE), terminal (terminal), user equipment (user equipment, UE), mobile terminal (mobile terminal, MT), etc.
  • the terminal device may also be a wearable device and a next-generation communication system, for example, a terminal device in a 5G communication system or a terminal device in a public land mobile network (PLMN) that will evolve in the future.
  • PLMN public land mobile network
  • Network equipment It can be a device in a wireless network.
  • the network device can be a RAN node (or device) that connects a terminal device to the wireless network, and can also be called a base station.
  • RAN equipment are: new generation Node B (gNodeB), transmission reception point (TRP), evolved Node B (evolved Node B, eNB), wireless network in 5G communication system Controller (radio network controller, RNC), node B (Node B, NB), base station controller (BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved Node B) , Or home Node B, HNB, baseband unit (BBU), or wireless fidelity (Wi-Fi) access point (AP), etc.
  • gNodeB new generation Node B
  • TRP transmission reception point
  • eNB evolved Node B
  • eNB evolved Node B
  • wireless network in 5G communication system Controller radio network controller
  • RNC radio network controller
  • the network device may include a centralized unit (CU) node, or a distributed unit (DU) node, or a RAN device including a CU node and a DU node.
  • the network device may be another device that provides wireless communication functions for the terminal device.
  • the embodiments of the present application do not limit the specific technology and specific device form adopted by the network device.
  • a device that provides a wireless communication function for a terminal device is referred to as a network device.
  • At least one of A, B, and C includes A, B, C, AB, AC, BC, or ABC.
  • the ordinal numbers such as “first” and “second” mentioned in the embodiments of this application are used to distinguish multiple objects, and are not used to limit the order, timing, priority, or importance of multiple objects. degree.
  • FIG. 1 is a schematic diagram of a network architecture to which an embodiment of this application is applicable.
  • the terminal device 130 can access a wireless network to obtain services from an external network (such as the Internet) through the wireless network, or communicate with other devices through the wireless network, for example, it can communicate with other terminal devices.
  • the wireless network includes RAN and core network (CN), where RAN is used to connect terminal equipment (such as terminal equipment 1301 or terminal equipment 1302) to the wireless network, and CN is used to manage terminal equipment and provide Gateway for external network communication.
  • the RAN may include one or more RAN devices, such as the RAN device 1101, the RAN device 1102, and the CN may include one or more CN devices, such as the CN device 120.
  • the CN may include multiple CN devices 120.
  • the CN device 120 may be an access and mobility management function (AMF) entity or user plane.
  • AMF access and mobility management function
  • Function user plane function, UPF
  • the number of devices in the communication system shown in FIG. 1 is only for illustration, and the embodiments of the present application are not limited to this. In actual applications, the communication system may also include more terminal devices and more RAN devices. Other devices can also be included.
  • FIG. 2 is a schematic diagram of another network architecture to which the embodiments of this application are applicable.
  • the network architecture includes CN equipment, RAN equipment and terminal equipment.
  • the RAN equipment includes a baseband device and a radio frequency device.
  • the baseband device can be implemented by one node or by multiple nodes.
  • the radio frequency device can be implemented remotely from the baseband device, or integrated in the baseband device, or part of its functions. Independent integration, part of the functions are integrated in the baseband device.
  • the RAN equipment includes a baseband device and a radio frequency device, where the radio frequency device can be arranged remotely relative to the baseband device, for example, a remote radio unit (RRU) is arranged relative to the BBU Remote wireless unit.
  • RRU remote radio unit
  • control plane protocol layer structure can include the RRC layer, the packet data convergence protocol (packet data convergence protocol, PDCP) layer, and radio link control (radio link control).
  • RRC layer packet data convergence protocol
  • PDCP packet data convergence protocol
  • radio link control radio link control
  • RLC layer media access control
  • MAC media access control
  • user plane protocol layer structure can include PDCP layer, RLC layer, MAC layer and physical layer and other protocol layer functions
  • the PDCP layer may also include a service data adaptation protocol (SDAP) layer.
  • SDAP service data adaptation protocol
  • the RAN equipment can be implemented by one node to implement the functions of the RRC, PDCP, RLC, and MAC protocol layers, or multiple nodes can implement the functions of these protocol layers.
  • RAN equipment may include CUs and DUs, and multiple DUs may be centrally controlled by one CU.
  • CU and DU can be divided according to the protocol layer of the wireless network. For example, the functions of the PDCP layer and the above protocol layers are set in the CU, and the protocol layers below the PDCP, such as the RLC layer and MAC layer, are set in the DU.
  • This type of protocol layer division is just an example, it can also be divided in other protocol layers, for example, in the RLC layer, the functions of the RLC layer and above protocol layers are set in the CU, and the functions of the protocol layers below the RLC layer are set in the DU; Or, in a certain protocol layer, for example, part of the functions of the RLC layer and the functions of the protocol layer above the RLC layer are set in the CU, and the remaining functions of the RLC layer and the functions of the protocol layer below the RLC layer are set in the DU. In addition, it can also be divided in other ways, for example, by time delay. The functions that need to meet the time delay requirement for processing time are set in the DU, and the functions that do not need to meet the time delay requirement are set in the CU.
  • the radio frequency device can be integrated independently, not placed in the DU, can also be integrated in the DU, or partly remote and partly integrated in the DU, and there is no restriction here.
  • FIG. 3 is a schematic diagram of another network architecture to which the embodiments of this application are applicable.
  • the control plane (CP) and the user plane (UP) of the CU can also be separated and implemented by dividing them into different entities, namely the control plane (CP) CU entity ( That is, the CU-CP entity) and the user plane (UP) CU entity (ie, the CU-UP entity).
  • CP control plane
  • UP user plane
  • the signaling generated by the CU can be sent to the terminal device through the DU, or the signaling generated by the terminal device can be sent to the CU through the DU.
  • the DU may directly pass the protocol layer encapsulation without analyzing the signaling and transparently transmit it to the terminal device or CU.
  • the sending or receiving of the signaling by the DU includes this scenario.
  • RRC or PDCP layer signaling will eventually be processed as PHY layer signaling and sent to the terminal device, or converted from received PHY layer signaling.
  • the RRC or PDCP layer signaling can also be considered to be sent by the DU, or sent by the DU and radio frequency load.
  • the network architecture shown in Figure 1, Figure 2 or Figure 3 above can be applied to various radio access technology (RAT) communication systems, such as 4G (or LTE) communication systems, or It is a 5G (or new radio (NR)) communication system, or a transitional system between an LTE communication system and a 5G communication system.
  • RAT radio access technology
  • the transitional system can also be called a 4.5G communication system, or of course it can be The communication system of the future.
  • the network architecture and business scenarios described in the embodiments of this application are intended to more clearly illustrate the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided in the embodiments of this application.
  • the devices in the following embodiments of the present application may be located in terminal equipment or network equipment according to their realized functions.
  • the network device may be a CU, or DU, or a RAN device including CU and DU.
  • the RAN device 1101 in FIG. 1 is referred to as a first network device
  • the RAN device 1102 is referred to as a second network device
  • the terminal device 1301 is referred to as a terminal device. It should be noted that these explanations are for making the embodiments of the present application easier to understand, and should not be regarded as limiting the scope of protection required by the present application.
  • the state of the terminal device may include an RRC idle (RRC_IDLE) state, an RRC inactive (Inactive) state, and an RRC connected (RRC_CONNECTED) state.
  • RRC idle state may be referred to as the idle state for short
  • RRC inactive state may be referred to as the inactive state or the third state for short
  • RRC connected state may be referred to as the connected state for short.
  • the coverage area of the network device may include one or more cells.
  • Figure 1 simply shows the cell a1 in the coverage area of the first network device and the coverage area of the second network device.
  • the first network device may instruct the terminal device to enter the inactive state.
  • the first network device may send an RRC release message to the terminal device.
  • the RRC release message is used to instruct the terminal device to enter the inactive state; accordingly, the terminal device may enter the inactive state after receiving the RRC release message.
  • the RRC connection between the inactive terminal device and the first network device is disconnected, but there is still a network connection corresponding to the terminal device between the first network device and the core network.
  • Access network notification area (RAN-based notification area, RNA)
  • the first network device may configure RNA for the terminal device and send RNA configuration information to the terminal device.
  • the RRC release message sent by the first network device to the terminal device may include RNA configuration information.
  • RNA may include one or more cells, and RNA configuration information includes at least one of the following: 1) One or more cell identifications, where multiple cells may belong to one network device or multiple network devices, for example, RNA includes cells a1 and Cell b1, the RNA configuration information can include the identities of cell a1 and cell b1; 2) At least one RAN tracking area code (RAN tracking area code), a RAN tracking area can include one or more cells, when a RAN tracking area is When multiple cells are included, the multiple cells may belong to one network device or multiple network devices.
  • RAN tracking area code RAN tracking area code
  • RAN- based notification area update (RANU) process.
  • the core network device After the terminal device enters the inactive state, since the network connection corresponding to the terminal device still exists between the first network device and the core network, when the core network device receives the downlink information of the terminal device, it will directly send the downlink information to The first network device that the terminal device is connected to last. Since the first network device cannot determine whether the terminal device is within its coverage area, when paging the terminal device, the first network device can use the RNA configured for the terminal device in the RNA (i.e., cell a1 and cell a1 of the first network device). Paging is performed in the cell b1) of the second network device. Specifically, the first network device may send a paging message in the cell a1, and send a RAN paging (XnAP RAN Paging) message to the second network device corresponding to the cell b1 through the Xn interface.
  • XnAP RAN Paging RAN paging
  • the first network device can send a RAN paging message to the second network device; accordingly, after receiving the RAN paging message, the second network device can determine the RAN paging area according to the RAN paging message, and then the RAN Paging the terminal equipment in the paging area.
  • the RAN paging area determined by the second network device may include one or more cells, the one or more cells are cells of the second network device, and the one or more cells belong to the RNA of the terminal device.
  • each of the multiple network devices can page the terminal device in its own RAN paging area.
  • the RAN paging message may be used to notify the network device to page the terminal device, and the RAN paging message may include the identification of the terminal device.
  • the RAN paging message may also include RAN paging area information, and the second network device may determine according to the RAN paging area information RAN paging area.
  • the RAN paging area information may include the identities of one or more cells, the one or more cells are the cells of the second network device, and the one or more cells belong to the RNA of the terminal device.
  • the RAN paging area information may include the identity of cell b1, and the second network device determines that the RAN paging area includes cell b1 according to the RAN paging area information, and may send a paging message in cell b1 to page the terminal device .
  • the RAN paging area information may include at least one RAN tracking area code.
  • the at least one RAN tracking area code may be the RAN tracking area code corresponding to the RNA cell of the second network device; taking cell b1 as an example, cell b1 If it is the cell of the second network device, and the cell b1 belongs to the RNA of the terminal device, the cell b1 is the RNA cell of the second network device.
  • the RAN paging message may include RAN tracking area code 1.
  • the cells corresponding to RAN tracking area code 1 are cell a1 and cell b1.
  • Cell a1 is the cell of the first network device
  • cell b1 is the cell of the second network device.
  • the second network device determines that the RAN paging area includes the cell b1 according to the RAN tracking area code 1, and sends a paging message in the cell b1 to page the terminal device.
  • Paging messages can be used to page terminal devices.
  • the network device may send paging messages on periodic paging resources. In a paging cycle, there may be multiple paging frames, and each paging frame may have multiple paging occasions (PO). Both the network device and the terminal device can determine the paging occasion corresponding to the terminal device according to the identification of the terminal device, and then the network device can send downlink control information (DCI) on the paging occasion corresponding to the terminal device.
  • DCI downlink control information
  • the DCI is used for To schedule paging messages, the DCI uses paging radio network temporary identity (P-RNTI) to scramble, and the network equipment sends the paging message on the time-frequency resource indicated by the DCI; accordingly, the terminal equipment
  • P-RNTI can be used to monitor the DCI on the paging occasion, and the paging message can be received according to the received DCI to obtain the specific content of the paging message.
  • the paging message may include a paging record list (PagingRecordlist), and the paging record list includes identifications of one or more terminal devices that need to be paged.
  • the inactive terminal device After the inactive terminal device receives the paging message, if it is determined that the identification of the terminal device is included in the paging record list, it can initiate a random access process to the network device; if it is determined that the terminal device is not included in the paging record list , You can continue to receive paging messages in the next paging cycle.
  • the first network device After the first network device instructs the terminal device to enter the inactive state, information exchange may be required between the first network device and the terminal device. For example, the first network device needs to send the downlink information after receiving the downlink information of the terminal device from the core network device. To the terminal equipment.
  • the first network device can page the terminal device in the RNA configured for the terminal device . After the terminal device receives the paging message in the cell in the RNA, it can initiate a random access process through the cell, and the first network device can learn which cell the terminal device is in; if the terminal device is in the second network device's coverage area Within the coverage of the cell, the first network device may send downlink information to the second network device, and the second network device sends the downlink information to the terminal device.
  • the terminal device may be within the coverage area of the cell a1 of the first network device, or may be within the coverage area of the cell b1 of the second network device, the terminal device may initiate a random access process to the first network device, or It is possible to initiate a random access procedure to the second network device.
  • the embodiment of the present application provides two random access procedures, which are a four-step random access procedure and a two-step random access procedure, respectively.
  • Figure 4a is a schematic diagram of a four-step random access process provided by an embodiment of this application. As shown in Figure 4a, it includes the following steps:
  • Step a1 The terminal device sends a random access request to the network device (the first network device or the second network device).
  • the random access request may include a random access preamble, and the network device receives random access from the terminal device. Preamble. Among them, the random access request is also called the first message or message 1 (Msg1) in the random access process.
  • Step a2 After detecting the random access preamble sent by the terminal device, the network device sends a random access response (RAR) to the terminal device, and the terminal device receives the random access response from the network device.
  • RAR random access response
  • the access response is also called the second message or message 2 (Msg2) in the random access process.
  • Step a3 The terminal device sends uplink signaling to the network device, and the network device receives the uplink signaling from the terminal device.
  • the uplink signaling is also called the third message or message 3 (Msg3) in the random access process.
  • Msg3 may be an RRC connection recovery request message.
  • Msg3 may also include uplink data.
  • Step a4 The network device receives Msg3 and sends a contention resolution message to the terminal device. Accordingly, the terminal device can receive a contention resolution message from the network device. If it is determined that the random access conflict is won according to the contention resolution message, the random access conflict can be determined to be random The access is successful; otherwise, the terminal device determines that this random access has failed, and can perform the random access process again.
  • the contention resolution message is also called the fourth message or message 4 (Msg4).
  • Msg4 may be a restore RRC connection message or an RRC release message.
  • Figure 4b is a schematic diagram of a two-step random access process provided by an embodiment of the application. As shown in Figure 4b, it includes the following steps:
  • Step b1 The terminal device sends a random access request to the network device.
  • the random access request can also be referred to as message A (MsgA), which includes random access preamble and uplink signaling, which is equivalent to Msg1 and Msg3 in the four-step random access process in Figure 4a, and can also be understood as , Is to put Msg1 and Msg3 "together".
  • MsgA message A
  • uplink signaling which is equivalent to Msg1 and Msg3 in the four-step random access process in Figure 4a
  • Step b2 the network device sends MsgB to the terminal device.
  • MsgB is the response information for the random access request, which may also be referred to as message B, and includes at least one of the response information for the random access preamble and the response information for the uplink signaling.
  • the random access process can be divided into a contention-based random access process and a non-contention-based random access process.
  • the network device can configure multiple random access preambles for the terminal device, and the terminal device can select one of the random access preambles.
  • the steps shown in Figure 4a and Figure 4b are the steps included in the contention-based random access process.
  • Figure 4c is a schematic diagram of the four-step random access process based on non-competition, as shown in Figure 4c, including:
  • Step c1 The network device allocates a random access preamble to the terminal device.
  • Step c2 The terminal device sends a random access request to the network device, where the random access request includes the allocated random access preamble.
  • Step c3 The network device sends a random access response to the terminal device.
  • the terminal device can determine that the random access is successful.
  • the non-competition-based random access process uses a dedicated random access process for terminal equipment to perform random access. Compared with the contention-based random access process , There will be no random access conflict, so that the terminal equipment can access the network equipment in time, effectively shortening the time for resuming service transmission.
  • the 5G communication system includes multiple bands, such as n1, n2, n41, and so on. Furthermore, SUL frequency bands have been introduced into the 5G communication system, such as n80, n81, n82, n83, n84, n85, and n86. Among them, n1, n2, n41, n80, n81, n82, n83, n84, n85, n86, etc. can be understood as frequency band numbers. Each frequency band number is used to identify the preset frequency range. For example, the frequency range identified by n41 is 2496MHz-2690MHz (the frequency range described here refers to the uplink frequency range), and the frequency range identified by n80 is 1710MHz-1785MHz.
  • the network equipment can configure one downlink carrier and two uplink carriers for a cell to improve the uplink coverage capability of the system.
  • the two uplink carriers are: SUL carrier and NUL carrier.
  • the SUL carrier may belong to the SUL frequency band, or in other words, the SUL carrier is located in the SUL frequency band; for example, if the frequency range of SUL carrier 1 is 1710 MHz-1740 MHz, then SUL carrier 1 is located in the SUL frequency band corresponding to n80.
  • the coverage area of the SUL carrier is larger than the coverage area of the NUL carrier.
  • the communication method provided in the embodiment of the present application may include four possible solutions, which are referred to as solution 1, solution 2, solution 3, and solution 4 for ease of description.
  • the embodiments of the present application provide solution one, solution two, and solution three.
  • the first network device may send a first message to the second network device.
  • the first message includes the SUL capability information of the terminal device, and the SUL capability information is used to instruct the terminal
  • the device supports SUL carrier, and the terminal device is in an inactive state.
  • Capability information instructs the terminal equipment to perform uplink transmission on the SUL carrier, thereby making it possible for the inactive terminal equipment to perform uplink transmission on the SUL carrier; in addition, due to the large coverage of the SUL carrier, when the terminal equipment is in the SUL When uplink transmission is performed on the carrier, it can effectively ensure that the uplink transmission reaches the second network device in time.
  • the first network device obtains the cell information of the second network device from the second network device, and the information includes the uplink carrier information of the cell; and the first network device is based on the uplink carrier information and the SUL capability information of the terminal device , Add the cell to the RNA of the terminal device.
  • the first network device fully considers the SUL capability of the terminal device when configuring RNA for the terminal device. For example, if the terminal device supports the SUL carrier, the first network device can add the cell that supports the SUL carrier to the terminal device. Therefore, it is possible for the subsequent terminal equipment to perform uplink transmission on the SUL carrier of the cell.
  • the first network device obtains the cell information of the second network device from the second network device, and the information includes the uplink carrier information of the cell; and the first network device is based on the uplink carrier information and the SUL capability information of the terminal device , Sending instruction information to the second network, where the instruction information is used to instruct the terminal equipment to support the SUL carrier of the cell; wherein, the first network equipment and the second network equipment are both located in the RNA of the terminal equipment.
  • the first network device determines whether to send instruction information to the second network device according to the uplink carrier information of the cell of the second network device and the SUL capability information of the terminal device; for example, if the first network device determines that the terminal device supports the The SUL carrier of the cell can send indication information to the second network, so that the second network device knows that the terminal device supports the SUL carrier of the cell, thereby making it possible for the terminal device to perform uplink transmission on the SUL carrier of the cell; and For example, if the first network device determines that the terminal device supports the SUL carrier, but the cell of the second network device does not support the SUL carrier, it may no longer send indication information to the second network, thereby effectively saving signaling overhead and transmission resources.
  • the second network device can directly learn that the terminal device supports the SUL carrier of the cell based on the indication information, thereby saving the processing burden of the second network device.
  • the embodiment of the present application provides solution four.
  • the network device after determining that the inactive terminal device supports the SUL carrier of the cell of the network device, the network device sends instruction information to the terminal device, and the instruction information is used to indicate that the network device is a terminal device
  • the first resource allocated, the first resource includes resources used for uplink transmission on the SUL carrier of the cell and/or resources used for uplink transmission on the NUL carrier of the cell.
  • the network device indicates the first resource to the terminal device in the inactive state, so that the terminal device can realize the uplink transmission in time according to the first resource.
  • the communication method may involve a first communication device and a second communication device.
  • the first communication device may be the RAN device 1101 in FIG. 1 or a communication device capable of supporting the RAN device 1101 to implement the functions required by the method. It is other communication devices, such as chips or chip systems.
  • the second communication device may be the RAN device 1102 in FIG. 1 or a communication device capable of supporting the functions required by the RAN device 1102 to implement the method, and of course it may also be other communication devices, such as a chip or a chip system.
  • the communication method may also involve a third communication device.
  • the third communication device may be the terminal device 1301 in FIG. Device, such as chip or chip system.
  • the first communication device is the RAN device 1101 (ie, the first network device)
  • the second communication device is the RAN device 1102 (ie, the second network device)
  • the third communication device is the terminal device as an example.
  • FIG. 5 is a schematic diagram of a process corresponding to the communication method provided in Embodiment 1 of the application, as shown in FIG. 5, including:
  • Step 501 The core network device sends the downlink information of the terminal device to the first network device, and the terminal device is in an inactive state.
  • the first network device receives the downlink information of the terminal device.
  • the first network device may be the network device that retains the context information of the terminal device, or the network device that the terminal device is connected to last, or the network device that serves the terminal device last.
  • the context information of the terminal device may include at least one of the following: the cell identity of the source primary cell, the physical cell identity of the source primary cell, and the cell radio network temporary identifier (C-RNTI) of the source primary cell ), robust header compression (ROHC) status.
  • C-RNTI cell radio network temporary identifier
  • ROHC robust header compression
  • the downlink information of the terminal device may include the downlink data (DL data) of the terminal device.
  • the core network device may be a UPF entity.
  • the downlink information of the terminal device may include signaling (DL UE-associated signaling) associated with the terminal device.
  • the core network device may be an AMF entity.
  • the signaling may refer to signaling other than the context release command (UE Context Release Command) of the terminal device.
  • Step 503 In response to receiving the downlink information, the first network device sends a first message to the second network device.
  • the first message includes SUL capability information of the terminal device.
  • the SUL capability information of the SUL capability information may be used to indicate that the terminal device supports SUL carrier.
  • the first network device may page the terminal device in the RNA configured for the terminal device by the first network device. For example, if the RNA configured by the first network device for the terminal device includes the cell a1 of the first network device and the cell b1 of the second network device, the first network device may send the first message to the second network device.
  • one network device may include one or more cells. When the network device includes multiple cells, the multiple cells may belong to the same RNA or may also belong to different RNAs. In the embodiments of the present application, for ease of description, for a network device, if at least one cell in the network device belongs to RNA1, it can be said that the network device is located in RNA1.
  • the RNA configured by the first network device for the terminal device includes the cell a1 of the first network device and the cell b1 of the second network device, it can be described that the first network device and the second network device are located in the same RNA. Among them, if a cell belongs to RNA1, it can also be described as being located in RNA1.
  • the first message may be used to notify the second network device to page the terminal device, that is, the first message may be a RAN paging message.
  • the RAN paging message may include the identification of the terminal device, the SUL capability information of the terminal device, and may also include RAN paging area information.
  • the RAN paging area information includes the identity of cell b1 or the RAN tracking area code;
  • the identification of the terminal device may be an inactive radio network temporary identification (I-RNTI).
  • the first message may also be a message dedicated to carrying SUL capability information of the terminal device.
  • the RAN paging message may include the identification of the terminal device, and may also include RAN paging area information, and the first network device may Send the RAN paging message and the first message to the second network device.
  • Step 504 The second network device receives the first message, and sends the second message according to the SUL capability information of the terminal device.
  • the second message is used to page the terminal device, that is, the second message may be a paging message.
  • the second network device may send a paging message to the terminal device on the cell b1 according to the SUL capability information of the terminal device and the uplink carrier information of the cell b1. For example, if the uplink carrier information of cell b1 matches the SUL capability information of the terminal device (that is, the terminal device supports the SUL carrier of cell b1), the second network device may instruct the terminal device to perform uplink transmission on the SUL carrier of cell b1. If the uplink carrier information of the cell b1 does not match the SUL capability information of the terminal equipment, it can be implemented according to the existing scheme.
  • the second network device's acquisition of the uplink carrier information of the cell b1 belongs to an internal implementation, which can also be understood as the second network device knowing or determining the uplink carrier information of the cell b1.
  • the second network device determines that the uplink carrier information of cell b1 matches the SUL capability information of the terminal device and then instructs the terminal device to perform uplink transmission on the SUL carrier of cell b1.
  • the specific operation to be performed is not limited in the first embodiment.
  • the embodiments of the present application will describe the situation where the terminal device supports the SUL carrier, and the implementation when the terminal device does not support the SUL carrier is not limited; and the situation where the cell b1 supports the SUL carrier will be described.
  • the implementation when the cell b1 does not support the SUL carrier is not limited.
  • the following describes the SUL capability information of the terminal device.
  • the SUL capability information of the terminal device may include indication information 1, which is used to indicate that the terminal device supports the SUL carrier; in this case, if the terminal device does not support the SUL carrier, the first network device may not Then send the SUL capability information of the terminal device to the second network device.
  • the indication information 1 can also be used to indicate whether the terminal equipment supports SUL carriers.
  • the indication information 1 includes 1 bit. If the value of this bit is 1, it means that the terminal equipment supports the SUL carrier; The value of the bit is 0, indicating that the terminal device does not support the SUL carrier; in this case, regardless of whether the terminal device supports the SUL carrier, the first network device can send the SUL capability information of the terminal device to the second network device.
  • the second network device determines that the terminal device supports the SUL carrier according to the indication information 1, and the second network device determines that the cell b1 also supports the SUL carrier according to the uplink carrier information of the cell b1, then the second network device It can be determined that the uplink carrier information of the cell b1 matches the SUL capability information of the terminal equipment. Otherwise, for example, the cell b1 does not support the SUL carrier, the second network device can determine that the uplink carrier information of the cell b1 does not match the SUL capability information of the terminal device.
  • the SUL capability information may include a list of SUL frequency bands supported by the terminal device, and the SUL frequency band list includes identifiers of one or more SUL frequency bands, such as n80 and n81.
  • the SUL capability information may also include subcarrier spacing information and bandwidth information supported by each SUL frequency band in the SUL frequency band list.
  • the sub-carrier interval supported by n80 includes 15kHz, and the supported bandwidth includes 5MHz, 10MHz, 15MHz, 20MHz, 25MHz, 30MHz; the sub-carrier interval supported by n80 includes 15kHz, and the supported bandwidth includes 5MHz, 10MHz, 15MHz, 20MHz, 25MHz , 30MHz;
  • the sub-carrier spacing supported by n81 includes 15kHz, and the supported bandwidth includes 5MHz, 10MHz, 15MHz, 20MHz, 25MHz, 30MHz.
  • the second network device After the second network device receives the SUL capability information, if it is determined that the SUL capability information includes a list of SUL frequency bands supported by the terminal device, etc., it can learn that the terminal device supports the SUL carrier.
  • the second network device may determine whether the SUL carrier supported by the cell b1 belongs to the frequency band in the SUL frequency band list according to the SUL frequency band list supported by the terminal device and the uplink carrier information of the cell b1.
  • the frequency range of the SUL carrier of cell b1 is 1710MHz to 1740MHz
  • the SUL frequency band list includes n80, n81, and the SUL carrier belongs to n80 (1710MHz-1785MHz)
  • the second network device can determine the uplink carrier information of cell b1 and the SUL of the terminal device Capability information matches. Otherwise, for example, the SUL carrier supported by the cell b1 does not belong to the frequency band in the SUL frequency band list, the second network device may determine that the uplink carrier information of the cell b1 does not match the SUL capability information of the terminal device.
  • the SUL capability information may include at least one SUL frequency band combination supported by the terminal device, and each SUL frequency band combination includes an identifier of a NUL frequency band and an identifier of the SUL frequency band associated with the NUL; for example, The SUL band combination is n41-n80. Further, the SUL capability information may also include subcarrier spacing information and bandwidth information supported by the SUL frequency band in each SUL frequency band combination. Understandably, the SUL frequency band associated with the NUL can also be described as a NUL bound or supported SUL frequency band.
  • the second network device After the second network device receives the SUL capability information, if it is determined that the SUL capability information includes a list of SUL frequency bands supported by the terminal device, etc., it can learn that the terminal device supports the SUL carrier.
  • the second network device may determine whether the SUL carrier supported by the cell of the second network device belongs to the SUL frequency band in the at least one SUL frequency band combination according to the at least one SUL frequency band combination supported by the terminal device.
  • the frequency range of the NUL carrier of cell b1 of the second network device is 2510MHz to 2540MHz
  • the frequency range of the SUL carrier is 1710MHz to 1740MHz
  • a combination of SUL frequency bands supported by the terminal device is n41-n80
  • the NUL carrier of cell b1 belongs to n41( 2496MHz to 2690MHz)
  • the SUL carrier of the cell b1 belongs to n80 (1710MHz-1785MHz)
  • the second network device can determine that the uplink carrier information of the cell b1 matches the SUL capability information of the terminal device.
  • the second network device may determine that the uplink carrier information of the cell b1 does not match the SUL capability information of the terminal device.
  • SUL capability information may include indication information 1 and terminal equipment A list of supported SUL frequency bands, or the SUL capability information may include indication information 1 and at least one combination of SUL frequency bands supported by the terminal device.
  • the SUL capability information may also include the subcarrier spacing information and bandwidth information supported by each SUL frequency band in the SUL frequency band list as an example.
  • the subcarrier spacing information and bandwidth information supported by each SUL frequency band in the SUL frequency band list may also be carried in other information elements of the first message. That is to say, in a possible implementation manner, the first message includes cell 1, which is used to carry SUL capability information (including the list of SUL frequency bands supported by the terminal device, and the list of SUL frequency bands supported by each SUL frequency band in the SUL frequency band list).
  • the first message includes cell 1 and cell 2, and cell 1 is used to carry SUL capability information (including a list of SUL frequency bands supported by the terminal device), Cell 2 is used to carry the subcarrier spacing information and bandwidth information supported by each SUL frequency band in the SUL frequency band list.
  • SUL capability information including a list of SUL frequency bands supported by the terminal device
  • Cell 2 is used to carry the subcarrier spacing information and bandwidth information supported by each SUL frequency band in the SUL frequency band list.
  • the second network device determines whether the uplink carrier information of the cell b1 matches the SUL capability information of the terminal device. According to the difference in the content included in the SUL capability information obtained by the second network device, There may also be other possible situations, which are not listed here.
  • the first network device sends the SUL capability information of the terminal device to the second network device, so that the second network device can learn the SUL capability of the terminal device, and the second network device can, according to the SUL capability information of the terminal device, Determine whether the uplink carrier information of the cell of the second network device matches the SUL capability information of the terminal device. If it matches, the terminal device can be instructed to perform uplink transmission on the SUL carrier, so that the inactive terminal device can perform on the SUL carrier. Uplink transmission.
  • Fig. 6 is a schematic diagram of the process corresponding to the communication method provided in the second embodiment of the application, as shown in Fig. 6, including:
  • Step 601 The first network device sends a request message to the second network device, where the request message is used to request information about the cell of the second network device.
  • step 602 the second network device receives the request message.
  • the first network device may send a request message to one or more network devices, and one or more network devices include the second network device .
  • the request message may include one or more cell identities; for example, the cells of the second network device include cell b1 and cell b2, and the first network device needs to request information about cell b1, then the request message may include cell b1. Of the logo.
  • the embodiment of the present application does not limit the manner in which the first network device determines which cell information needs to be requested.
  • steps 601 and 602 are optional steps and can be selectively executed according to actual needs.
  • Step 603 The second network device sends the information of the cell b1 of the second network device to the first network device.
  • the first network device receives the information of the cell b1 of the second network device.
  • the information of the cell b1 may include the uplink carrier information of the cell b1, and the uplink carrier information of the cell b1 may include the indication information 2, which is used to indicate that the cell b1 supports the SUL carrier.
  • the uplink carrier information of cell b1 may also include at least one of the following: frequency information of the SUL carrier of cell b1, bandwidth information of the SUL carrier of cell b1, subcarrier spacing information of the SUL carrier of cell b1, and cell b1 CG capability information, and the two-step random access capability information of cell b1.
  • the frequency information of the SUL carrier may be the frequency of the center frequency of the SUL carrier or the frequency number of the SUL carrier; the frequency range of the SUL carrier can be determined according to the frequency information of the SUL carrier and the bandwidth information of the SUL carrier.
  • the frequency information of the SUL carrier may be the frequency information of the first uplink bandwidth part (BWP) of the SUL carrier, and the bandwidth or subcarrier interval of the SUL carrier refers to the bandwidth of the first uplink BWP of the SUL carrier Or subcarrier spacing.
  • the first uplink BWP may be used for the terminal device to send data with a small amount of data in the inactive state, and the first uplink BWP may be the initial uplink BWP or other BWPs.
  • Step 605 The first network device adds the cell b1 to the RNA of the terminal device according to the uplink carrier information of the cell b1 and the SUL capability information of the terminal device.
  • the first network device may add cell b1 to the RNA of the terminal device. If it matches, cell b1 can be excluded from the RNA of the terminal device. That is, if the cell b1 includes a SUL carrier, when the cell b1 is added to the RNA of one or more terminal devices, the one or more terminal devices all support the SUL carrier of the cell b1.
  • the first network device adds cell b1 to the RNA of the terminal device, which can also be described as: the first network device determines that the RNA of the terminal device includes cell b1; the first network device excludes cell b1 from the RNA of the terminal device, or It is described as that the first network device determines that the RNA of the terminal device does not include the cell b1.
  • the SUL capability information of the terminal device may include indication information 1, which indicates that the terminal device supports the SUL carrier.
  • the uplink carrier information of the cell b1 includes indication information 2, and the indication information 2 is used to indicate that the cell b1 supports the SUL carrier.
  • the first network device may determine that the uplink carrier information of the cell b1 matches the SUL capability information of the terminal device, and may add the cell b1 to the RNA of the terminal device.
  • the terminal device supports SUL carrier but cell b1 does not support SUL carrier, or the terminal device does not support SUL carrier but cell b1 supports SUL carrier, it can be determined that the uplink carrier information of cell b1 does not match the SUL capability information of the terminal device, and The cell b1 can be excluded from the RNA of the terminal device.
  • the SUL capability information of the terminal device includes a list of SUL frequency bands supported by the terminal device, and subcarrier spacing information and bandwidth information supported by each SUL frequency band in the SUL frequency band list.
  • the uplink carrier information of the cell b1 includes frequency information of the SUL carrier of the cell b1, bandwidth information of the SUL carrier, and subcarrier spacing information of the SUL carrier.
  • the first network device determines that the SUL carrier of cell b1 is located in one of the SUL frequency bands (such as SUL frequency band 1) in the SUL frequency band list, the bandwidth of the SUL carrier is less than or equal to the bandwidth supported by SUL frequency band 1, and the bandwidth of the SUL carrier
  • the subcarrier interval is the subcarrier interval supported by SUL band 1, and cell b1 can be added to the RNA of the terminal device.
  • the SUL carrier of cell b1 is not in any SUL band in the SUL band list; or, the frequency of the SUL carrier is in SUL band 1, but the bandwidth of the SUL carrier is greater than the bandwidth supported by SUL band 1; or, the SUL carrier The frequency of the SUL is located in SUL Band 1.
  • the bandwidth of the SUL carrier is less than or equal to the bandwidth supported by SUL Band 1, but the subcarrier spacing of the SUL carrier is not the subcarrier spacing supported by SUL Band 1.
  • the first network device can determine the cell b1
  • the uplink carrier information does not match the SUL capability information of the terminal device, and the cell b1 can be excluded from the terminal device's RNA.
  • the first network device determines whether the uplink carrier information of the cell b1 and the SUL capability information of the terminal device match, and there may be other possible situations, which are not listed here.
  • the manner in which the first network device determines whether the uplink carrier information of cell b1 matches the SUL capability information of the terminal device in the second embodiment is the same as the manner in which the second network device determines the uplink carrier information of cell b1 and the SUL capability information of the terminal device in the first embodiment The ways in which the capability information matches can be cross-referenced.
  • Step 606 The first network device sends an RRC release message to the terminal device.
  • the RRC release message may include RNA configuration information.
  • the RNA configured by the first network device for the terminal device includes the cell a1 and the cell b1, and the RNA configuration information may include the identity of the cell a1 and the identity of the cell b1.
  • step 607 the terminal device receives the RRC release message and enters the inactive state.
  • Step 608 The core network device sends the downlink information of the terminal device to the first network device.
  • the first network device receives the downlink information of the terminal device.
  • Step 610 The first network device pages the terminal device in the RNA of the terminal device, for example, sends a RAN paging message to the second network device.
  • Step 611 The second network device receives the RAN paging message, and pages the terminal device according to the RAN paging message.
  • the RAN paging message may include the identity of the terminal device and the identity of the cell b1, and the second network device can learn that the uplink carrier information of the cell b1 matches the SUL capability information of the terminal device according to the RAN paging message, thereby instructing the terminal The device performs uplink transmission on the SUL carrier of cell b1.
  • the second network device instructs the terminal device to perform uplink transmission on the SUL carrier of cell b1 after receiving the RAN paging message, and the second network device determines to receive the RAN paging message (That is, after knowing that the uplink carrier information of the cell b1 matches the SUL capability information of the terminal equipment), what kind of operation is specifically performed is not limited in the second embodiment.
  • the first network device determines whether to add the cell to the RNA of the terminal device according to the uplink carrier information of the cell of the second network device, and when the uplink carrier information of the cell matches the SUL capability information of the terminal device, The cell is added to the RNA of the terminal device. Furthermore, if the second network device subsequently receives the RAN paging message sent by the first network device, it can learn that the uplink carrier information of the cell of the second network device matches the SUL capability information of the terminal device, thereby indicating that the terminal device is in the SUL Uplink transmission is performed on the carrier, so that the inactive terminal device can perform uplink transmission on the SUL carrier.
  • Fig. 7 is a schematic diagram of a process corresponding to the communication method provided in the third embodiment of the application, as shown in Fig. 7, including:
  • Step 701 The first network device sends a request message to the second network device, where the request message is used to request information about the cell (for example, cell b1) of the second network device.
  • the first network device may obtain the SUL capability information of the terminal device. For example, before the first network device instructs the terminal device to enter the inactive state, the terminal device may report the SUL capability information of the terminal device to the first network device.
  • RNA After the first network device configures RNA for the terminal device, if it is determined that the terminal device supports the SUL carrier, when the RNA includes the cell a1 of the first network device and the cell b1 of the second network device, a request message can be sent to the second network device.
  • the request message may include the identity of the cell; for example, the cell of the second network device includes cell b1 and cell b2, and the first network device needs to request information about cell b1, then the request message may include the identity of cell b1.
  • the cell required by the request message sent by the first network device to the second network device refers to a cell included in the second network device and belonging to RNA.
  • step 702 the second network device receives the request message.
  • steps 701 and 702 are optional steps and can be selectively executed according to actual needs.
  • Step 703 The second network device sends the information of the cell b1 to the first network device, and the information of the cell b1 includes the uplink carrier information of the cell b1.
  • the first network device receives the information of the cell b1.
  • Step 705 The core network device sends the downlink information of the terminal device to the first network device, and the terminal device is in an inactive state.
  • the first network device receives the downlink information of the terminal device.
  • step 705 may be executed after step 701, or may also be executed before step 701, and the embodiment of the present application does not limit the execution order of each step.
  • Step 707 The first network device determines whether the uplink carrier information of the cell b1 matches the SUL capability information of the terminal device, if they match, perform step 708; if they do not match, perform step 710.
  • Step 708 The first network device sends the RAN paging message 1 to the second network device.
  • the RAN paging message 1 includes indication information 3.
  • the indication information 3 is used to indicate that the terminal device supports the SUL carrier of cell b1, or the indication information 3 is used. To indicate that the terminal equipment supports the SUL carrier in the cell b1, or in other words, the indication information 3 is used to indicate that the uplink carrier information of the cell b1 matches the SUL capability information of the terminal equipment.
  • the RAN paging message 1 may also include the identification of the terminal device and the RAN paging area information.
  • Step 709 The second network device receives the RAN paging message 1, and pages the terminal device according to the RAN paging message 1.
  • the second network device may instruct the terminal device to perform uplink transmission on the SUL carrier of cell b1.
  • the second network device instructs the terminal device to perform uplink transmission on the SUL carrier of cell b1 after receiving the RAN paging message 1, and the second network device determines to receive the RAN paging After message 1 (that is, it is known that the uplink carrier information of the cell b1 matches the SUL capability information of the terminal device), which operation is performed specifically, this is not limited in the third embodiment.
  • Step 710 The first network device sends a RAN paging message 2 to the second network device.
  • the RAN paging message 2 includes the identification of the terminal device and the RAN paging area information.
  • Step 711 The second network device receives the RAN paging message 2, and pages the terminal device according to the RAN paging message 2.
  • the second network device receives the RAN paging message 2, and can page the terminal device according to the existing scheme.
  • the first network device determines that the RNA configured for the terminal device includes the cell of the second network device, it can obtain the uplink carrier information of the cell of the second network device. If the uplink carrier information of the cell is determined and the SUL capability of the terminal device When the information matches, the RAN paging message 1 can be sent to the second network device; furthermore, when the second network device receives the RAN paging message 1 sent by the first network device, it can learn that the terminal device supports the cell of the second network device. The SUL carrier can thereby instruct the terminal device to perform uplink transmission on the SUL carrier, so that the inactive terminal device can perform uplink transmission on the SUL carrier.
  • FIG. 8 is a schematic diagram of a process corresponding to the communication method provided in Embodiment 1 of the application, as shown in FIG. 8, including:
  • Step 801 The network device determines that the terminal device supports the SUL carrier of the first cell, the terminal device is in an inactive state, and the first cell is a cell included in the network device.
  • the terminal equipment supports the SUL carrier of the first cell, which can also be described as the terminal equipment supporting the SUL carrier in the first cell.
  • the RNA of the terminal device includes the first cell.
  • the network device determines that it needs to page the terminal device in the first cell, it can determine that the terminal device is in the first cell according to the SUL capability information of the terminal device and the uplink carrier information of the first cell. Whether to support SUL carrier. If the SUL capability information of the terminal device matches the uplink carrier information of the first cell, the network device can determine that the terminal device supports the SUL carrier in the first cell; if the SUL capability information of the terminal device does not match the uplink carrier information of the first cell, Then the network device can determine that the terminal device does not support the SUL carrier in the first cell. There may be multiple ways for the network device to determine whether the SUL capability information of the terminal device matches the uplink carrier information of the first cell, and reference may be made to the related descriptions in the first and second embodiments above.
  • the network device may be the first network device or the second network device.
  • the first network device is the network device that retains the context of the terminal device, or the network device that the terminal device is connected to last, or the network device that serves the terminal device last.
  • the second network device is different from the first network device, and the second network device is located in the RNA configured for the terminal device by the first network device.
  • the network device may determine that it needs to page the terminal device in the first cell. For example, when the network device is the first network device, if the first network device receives the downlink information of the terminal device from the core network device, it can determine that the terminal device needs to be paged in the first cell. When the network device is the second network device, if the second network device receives the RAN paging message from the first network device, the RAN paging message includes the identification of the terminal device and the RAN paging area information, and the RAN paging area information includes the first network device. The identity of a cell or the RAN tracking area code corresponding to the first cell can determine that the terminal device needs to be paged in the first cell.
  • a network device can obtain SUL capability information of a terminal device.
  • the terminal device can report the terminal device to the first network device through the RRC connection with the first network device.
  • the second network device may obtain the SUL capability information of the terminal device from the first network device.
  • Step 802 The network device sends instruction information 4 to the terminal device, where the instruction information 4 may be carried in a paging message or other possible messages.
  • Step 803 The terminal device receives the indication information 4, and uses the resources used for uplink transmission on the SUL carrier of the first cell or the resources used for uplink transmission on the NUL carrier of the first cell to perform uplink transmission according to the indication information 4.
  • the indication information 4 may be used to instruct the terminal equipment to perform uplink transmission on the SUL carrier or perform uplink transmission on the NUL.
  • the network device may use the resource usage of the SUL carrier in the first cell to instruct the terminal device to perform uplink transmission on the SUL carrier or perform uplink transmission on the NUL. For example, if the network equipment determines that there are enough resources on the SUL carrier of the first cell for the terminal equipment to use, it can instruct the terminal equipment to perform uplink transmission on the SUL carrier, and if it is determined that there are not enough resources on the SUL carrier of the first cell for the terminal equipment When the device is used, it can instruct the terminal device to perform uplink transmission on the NUL carrier.
  • the network device determines whether the terminal device performs uplink transmission on the SUL carrier or performs uplink transmission on the NUL carrier, so that the flexibility of network device regulation is higher.
  • the indication information may be used to indicate the first resource allocated by the network device to the terminal, and the first resource includes a resource used for uplink transmission on the SUL carrier and a resource used for uplink transmission on the NUL carrier.
  • the indication information 4 is used to instruct the terminal equipment to perform uplink transmission on the SUL carrier of the first cell.
  • the network device may also send instruction information 5 to the terminal device, where the instruction information 5 is used to indicate resources used for uplink transmission on the SUL carrier of the first cell.
  • the terminal device after receiving the indication information 4 and the indication information 5, the terminal device can use the resources used for uplink transmission on the SUL carrier of the first cell for uplink transmission.
  • the network device may send the instruction information 4 and the instruction information 5 to the terminal device.
  • the network device sends a paging message to the terminal device, and the paging message includes indication information 4 and indication information 5.
  • the network device sends a paging message to the terminal device, and the paging message includes the indication information 4; and the network device sends a third message to the terminal device, and the third message includes the indication information 5.
  • the paging message may further include indication information 6, which is used to instruct the terminal device to receive the third message.
  • the network device sends a third message to the terminal device, the third message includes indication information 4 and indication information 5; and the network device sends a paging message to the terminal device, optionally, the paging message may include indication information 6, indicating Information 6 is used to instruct the terminal device to receive the third message.
  • the network device sending the third message to the terminal device may mean: the network device sends the DCI for scheduling the third message to the terminal device (the DCI may also be scrambled by P-RNTI), and the DCI The third message is sent on the indicated time-frequency resource.
  • the resources used for uplink transmission may include random access resources, or may also include configured authorized resources, which will be introduced separately below.
  • the resources used for uplink transmission may include random access resources.
  • the indication information 5 can be used to indicate random access resources.
  • the random access resource may be a random access resource in a four-step or two-step random access process based on contention, or may also be a random access resource in a four-step or two-step random access process based on non-competition.
  • the resources used for uplink transmission are mainly random access resources in a four-step or two-step random access process based on non-competition as an example for description.
  • random access resources can include random access preamble and physical random access channel (PRACH) resources, and the indication information 5 can be used to indicate random access.
  • PRACH physical random access channel
  • the terminal device uses random access resources for uplink transmission, which may mean that the terminal device sends a random access preamble on the PRACH resource.
  • the indication information 5 may indicate the random access preamble and PRACH resources in multiple ways.
  • the indication information 5 may indicate the random access preamble and PRACH resources respectively.
  • the indication information 5 may include the index of the random access preamble, thereby indicating the random access preamble.
  • PRACH resources include PRACH time domain resources and PRACH frequency domain resources.
  • the indication information 5 may include a time offset (offset).
  • the time offset can be understood as a length of time.
  • the unit of the shift amount can be a time slot, a symbol, or a subframe, etc.; or, it can also be other possible time units, which are not specifically limited.
  • the reference position corresponding to the time offset may be the end position of the time domain resource carrying the message 1, or may also be the end position of the time domain resource carrying the DCI used for scheduling the message 1.
  • the message 1 may refer to a paging message; when the indication information 5 is carried in a third message, the message 1 may refer to the third message.
  • the time offset is 1 time slot
  • the reference position is the end position of the time domain resource carrying the paging message, that is, the reference position is the end position of time slot 0, according to the reference position and the time offset
  • the PRACH time domain resource can be obtained in time slot 2.
  • the time offset may also be predefined by the protocol. In this case, the indication information 5 may no longer include the time offset. Time offset.
  • the indication information 5 may include the index of the random access resource.
  • the network device may broadcast multiple sets of candidate random access resources and the index of each set of candidate random access resources through a system message, and then after receiving the indication information 5, the terminal device may, according to the index included in the indication information 5, read from The random access resource is determined from the multiple sets of candidate random access resources.
  • the index of the random access resource may be the index of the random access preamble.
  • random access resources may include random access preambles, PRACH resources, and physical uplink shared channel (PUSCH) resources.
  • the terminal device uses random access resources for uplink transmission, which may mean that the terminal device sends a random access preamble on the PRACH resource and sends uplink signaling (such as an RRC recovery request message) on the PUSCH resource.
  • the manner in which the indication information 5 indicates the random access resource can refer to the above description.
  • the indication information 5 may also indicate the PUSCH time domain resource by indicating the time offset. For details, refer to the description of the indication information 5 indicating the PRACH time domain resource above.
  • the resources used for uplink transmission include configuration authorized resources.
  • the indication information 5 may respectively indicate the configuration of authorized time domain resources and the configuration of authorized frequency domain resources.
  • the indication information 5 may also indicate the configuration of authorized time domain resources by indicating the time offset. For details, refer to the description of the indication information 5 indicating the PRACH time domain resources above.
  • the indication information 5 may include the index of the configured authorized resource.
  • the network device may broadcast multiple sets of candidate configuration authorization resources and the index of each set of configuration authorization resources through a system message, and then, after receiving the indication information 5, the terminal device may use the indexes included in the indication information 5 to obtain information from multiple sets of candidate configuration authorization resources.
  • the configuration authorization resource is determined in the configuration authorization resource.
  • the subcarrier interval for configuring authorized resources on the SUL carrier (or NUL carrier) allocated by the network device to the terminal device is the subcarrier interval supported by the terminal device on the SUL carrier (or NUL carrier).
  • the configuration authorized resource may be a resource dedicated to the terminal device.
  • the indication information 4 is used to instruct the terminal equipment to perform uplink transmission on the NUL carrier of the first cell.
  • the network device may also send indication information 5 to the terminal device, where the indication information 5 is used to indicate resources used for uplink transmission on the NUL carrier of the first cell.
  • the terminal device after receiving the indication information 4 and the indication information 5, the terminal device can use the resources used for uplink transmission on the NUL carrier of the first cell for uplink transmission.
  • the indication information 4 is used to indicate the first resource allocated by the network device to the terminal.
  • the first resource may include the resource used for uplink transmission on the SUL carrier of the first cell and the resource used for uplink transmission on the NUL carrier of the first cell.
  • the terminal device can determine to perform uplink transmission on the SUL carrier of the first cell or perform uplink transmission on the NUL carrier of the first cell according to the downlink measurement value. For example, if the downlink measurement value is less than or equal to the preset threshold, the terminal device can perform uplink transmission on the SUL carrier of the first cell; otherwise, the terminal device can perform uplink transmission on the NUL carrier of the first cell.
  • the downlink measurement value may be a measurement value in the downlink direction between the terminal device and the network device; the terminal device may obtain the downlink measurement value through downlink measurement.
  • the downlink measurement value may include one of reference signal receiving power (RSRP), reference signal receiving quality (RSRQ), or reference signal signal to interference plus noise ratio (SINR). Multiple.
  • the preset threshold may include thresholds corresponding to one or more of RSRP, RSRQ, or SINR, respectively.
  • the terminal device can compare RSRP with the threshold corresponding to RSRP; when the downlink measurement value includes RSRQ, the terminal device can compare RSRQ with the threshold corresponding to RSRQ; when the downlink measurement value includes SINR, The terminal device can compare the SINR with the threshold corresponding to the SINR.
  • the downlink measurement value includes RSRP and RSRQ. When RSRP is less than or equal to the threshold corresponding to RSRP, and RSRQ is less than or equal to the threshold corresponding to RSRQ, the terminal device can determine that the downlink measurement value is less than or equal to the preset threshold.
  • the terminal equipment can determine the uplink transmission on the SUL carrier or NUL carrier based on the downlink measurement value. Because the size of the downlink measurement value can reflect the distance between the terminal equipment and the network device, for example, the downlink measurement value is relatively low. If it is small, it means that the distance between the terminal equipment and the network equipment is relatively long, and the terminal equipment may not be in the coverage of the NUL carrier. Therefore, the terminal equipment can perform uplink transmission on the SUL carrier to ensure that the uplink transmission can reach the network equipment in time; and For example, a large downlink measurement value indicates that the distance between the terminal equipment and the network equipment is relatively short, and the terminal equipment is within the coverage of the NUL carrier, so the terminal equipment can perform uplink transmission on the NUL carrier.
  • the network device can allocate resources for uplink transmission on the SUL carrier to the terminal device, thereby facilitating the realization of the terminal device for uplink transmission on the SUL carrier.
  • the resource used for uplink transmission as a random access resource as an example, in the current scheme, there may be multiple events that trigger the random access process, such as the arrival of downlink data in an inactive state.
  • the terminal device uses the contention-based random access process to initiate random access.
  • the network device indicates random access for the terminal device.
  • the terminal device can initiate random access using the non-competition-based random access process, which can shorten the time for the terminal device to access the network device. This enables the network equipment to send the downlink information to the terminal equipment in time.
  • Embodiment 1 to Embodiment 4 can be implemented separately or in combination.
  • the first embodiment, the second embodiment and the third embodiment can all be implemented in combination with the fourth embodiment.
  • the second network device determines that the uplink carrier information of cell b1 matches the SUL capability information of the terminal device according to the first message.
  • the solution in the fourth embodiment can be adopted, that is, step 802 is performed, and the instruction information 4 is sent to the terminal device. Accordingly, the terminal device can perform step 803.
  • step 611 of the second embodiment after the second network device receives the RAN paging message, the solution in the fourth embodiment can be adopted, that is, step 802 is executed. , Send instruction information 4 to the terminal device, and accordingly, the terminal device can perform step 803.
  • step 709 of the third embodiment after the second network device receives the RAN paging message 1, the solution in the fourth embodiment can be adopted, that is, step 802: Send instruction information 4 to the terminal device, and accordingly, the terminal device can perform step 803.
  • the first to the fourth embodiments can refer to each other.
  • the realization of the matching between the uplink carrier information of the relevant cell and the SUL capability information of the terminal equipment can be referred to the first embodiment and the second embodiment.
  • the content between different implementation manners or different situations in the various embodiments may also be cross-referenced.
  • the manner in which the network device terminal device sends the indication information 4 and the indication information 5 can refer to the description of the case 1.
  • step numbers of the flowcharts described in the first to fourth embodiments are only an example of the execution process, and do not constitute a restriction on the order of execution of the steps.
  • This application implements In the example, there is no strict execution order between steps that have no timing dependence between each other.
  • not all the steps shown in each flowchart are necessary steps, and some steps can be added or deleted on the basis of each flowchart according to actual needs.
  • the network device or the terminal device may include a hardware structure and/or software module corresponding to each function.
  • the embodiments of the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.
  • the embodiment of the present application may divide the terminal device and the network device into functional units according to the foregoing method examples.
  • each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one unit.
  • the above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.
  • FIG. 10 shows a possible exemplary block diagram of a device involved in an embodiment of the present application.
  • the apparatus 1000 may include: a processing unit 1002 and a communication unit 1003.
  • the processing unit 1002 is used to control and manage the actions of the device 1000.
  • the communication unit 1003 is used to support communication between the apparatus 1000 and other devices.
  • the communication unit 1003 is also called a transceiving unit, and may include a receiving unit and/or a sending unit, which are used to perform receiving and sending operations, respectively.
  • the device 1000 may further include a storage unit 1001 for storing program codes and/or data of the device 1000.
  • the apparatus 1000 may be the terminal device in any of the foregoing embodiments, or may also be a chip provided in the terminal device.
  • the processing unit 1002 may support the apparatus 1000 to perform the actions of the terminal device in the above method examples.
  • the processing unit 1002 mainly executes the internal actions of the terminal device in the method example, and the communication unit 1003 can support communication between the apparatus 1000 and the network device.
  • the communication unit 1003 may be used to perform step 607 in FIG. 6 and step 803 in FIG. 8.
  • the processing unit 1002 is configured to release the RRC connection with the first network device and enter the inactive state;
  • the communication unit 1003 is configured to receive the second message from the second network device, The second message is used to page the terminal device; the second message is sent according to the first message from the first network device, the first message includes the SUL capability information of the terminal device, and the SUL capability information is used to indicate that the terminal device supports the SUL carrier ;
  • the first network device and the second network device are located in the RAN notification area of the terminal device.
  • the second message includes first indication information, and the first indication information is used to instruct the terminal equipment to perform uplink transmission on the first carrier; the processing unit 1002 is further configured to determine that the first carrier is used for uplink transmission. Transmission resources; the communication unit 1003 is also configured to use resources for uplink transmission; wherein, the first carrier is a SUL carrier or a NUL carrier.
  • the communication unit 1003 is further configured to receive second indication information from the second network device, where the second indication information is used to indicate resources used for uplink transmission on the first carrier; the processing unit 1002 specifically uses Therefore, the resource is determined according to the second indication information.
  • the second message includes second indication information, and the second indication information is used to indicate resources used for uplink transmission on the SUL carrier and resources used for uplink transmission on the NUL carrier;
  • the processing unit 1002 is further configured to , Obtain the downlink measurement value, the downlink measurement value is the measurement value in the downlink direction between the terminal device and the second network device;
  • the communication unit 1003 is also configured to, if the downlink measurement value is less than the preset threshold, use the SUL carrier for Uplink transmission resources are used for uplink transmission.
  • the apparatus 1000 may be the first network device in any of the foregoing embodiments, or may also be a chip provided in the first network device.
  • the processing unit 1002 may support the apparatus 1000 to perform the actions of the first network device in the foregoing method examples.
  • the processing unit 1002 mainly executes the internal actions of the first network device in the method example, and the communication unit 1003 can support communication between the apparatus 1000 and other devices.
  • the communication unit 1003 can be used to perform step 502, step 503 in FIG. 5, step 601, step 604, step 606, step 609, and step 610 in FIG. 6, step 701, step 706, and step 708 in FIG. Step 710, and step 802 in FIG. 8;
  • the processing unit 1002 is configured to execute step 605 in FIG. 6, step 707 in FIG. 7, and step 801 in FIG. 8.
  • the communication unit 1003 is configured to receive downlink data of the terminal device from the core network device; and send a first message to the second network device, the first message including supplementary uplink SUL capability information of the terminal device , SUL capability information is used to indicate that the terminal device supports the SUL carrier; wherein, the first network device and the second network device are located in the radio access network RAN notification area of the terminal device.
  • the SUL capability information includes a list of SUL frequency bands supported by the terminal device, and the SUL frequency band list includes the identification of one or more SUL frequency bands; or, the SUL capability information includes at least one combination of SUL frequency bands supported by the terminal device.
  • a combination of SUL frequency bands includes an identifier of a normal uplink NUL frequency band and an identifier of the SUL frequency band associated with the NUL.
  • the first message further includes: bandwidth information supported by the SUL frequency band; and/or subcarrier spacing supported by the SUL frequency band.
  • the apparatus 1000 may be the second network device in any of the foregoing embodiments, or may also be a chip provided in the second network device.
  • the processing unit 1002 may support the apparatus 1000 to perform the actions of the second network device in the foregoing method examples.
  • the processing unit 1002 mainly executes the internal actions of the second network device in the method example, and the communication unit 1003 can support communication between the apparatus 1000 and other devices.
  • the communication unit 1003 can be used to perform step 504 in FIG. 5, step 603 and step 611 in FIG. 6, step 702, step 703, step 709, step 711 in FIG. 7, and step 802 in FIG. 8; processing The unit 1002 is used to perform step 801 in FIG. 8.
  • the communication unit 1003 is configured to receive a first message from a first network device, the first message includes SUL capability information of the terminal device, and the SUL capability information is used to indicate that the terminal device supports the SUL carrier; and Send a second message according to the SUL capability information of the terminal device, the second message is used to page the terminal device; wherein the first network device and the second network device are located in the radio access network RAN notification area of the terminal device.
  • the SUL capability information includes a list of SUL frequency bands supported by the terminal device, and the SUL frequency band list includes the identification of one or more SUL frequency bands; or, the SUL capability information includes at least one combination of SUL frequency bands supported by the terminal device.
  • a combination of SUL frequency bands includes an identifier of a normal uplink NUL frequency band and an identifier of the SUL frequency band supported by the NUL.
  • the first message further includes: bandwidth information supported by the SUL frequency band; and/or subcarrier spacing supported by the SUL frequency band.
  • the second message includes first indication information, and the first indication information is used to instruct the terminal equipment to perform uplink transmission on the first carrier; where the first carrier is a SUL carrier or a NUL carrier.
  • the second message further includes second indication information, and the second indication information is used to indicate resources used for uplink transmission on the first carrier.
  • the communication unit 1003 is further configured to send a third message to the terminal device, the third message includes second indication information, and the second indication information is used to indicate resources used for uplink transmission on the first carrier.
  • the second message further includes third indication information, and the third indication information is used to instruct the terminal device to receive the third message.
  • the second message includes fourth indication information, and the fourth indication information is used to indicate resources used for uplink transmission on the SUL carrier and resources used for uplink transmission on the NUL carrier.
  • the resources used for uplink transmission include any of the following: random access resources, where the random access resources include random access preambles, or, the random access resources include random access preambles and PUSCH Resources; configure authorized resources.
  • each unit in the device can be all implemented in the form of software called by processing elements; they can also be all implemented in the form of hardware; part of the units can also be implemented in the form of software called by the processing elements, and some of the units can be implemented in the form of hardware.
  • each unit can be a separate processing element, or it can be integrated in a certain chip of the device for implementation.
  • it can also be stored in the memory in the form of a program, which is called and executed by a certain processing element of the device. Function.
  • each step of the above method or each of the above units may be implemented by an integrated logic circuit of hardware in a processor element or implemented in a form of being called by software through a processing element.
  • the unit in any of the above devices may be one or more integrated circuits configured to implement the above methods, for example: one or more application specific integrated circuits (ASICs), or, one or Multiple microprocessors (digital singnal processors, DSPs), or, one or more field programmable gate arrays (Field Programmable Gate Arrays, FPGAs), or a combination of at least two of these integrated circuits.
  • ASICs application specific integrated circuits
  • DSPs digital singnal processors
  • FPGAs Field Programmable Gate Arrays
  • the unit in the device can be implemented in the form of a processing element scheduler
  • the processing element can be a processor, such as a general-purpose central processing unit (central processing unit, CPU), or other processors that can call programs.
  • CPU central processing unit
  • these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).
  • the above receiving unit is an interface circuit of the device for receiving signals from other devices.
  • the receiving unit is an interface circuit used by the chip to receive signals from other chips or devices.
  • the above unit for sending is an interface circuit of the device for sending signals to other devices.
  • the sending unit is an interface circuit used by the chip to send signals to other chips or devices.
  • FIG. 11 is a schematic structural diagram of a terminal device according to an embodiment of the application. It may be the terminal device in the above embodiment, and is used to implement the operation of the terminal device in the above embodiment.
  • the terminal device includes: an antenna 1110, a radio frequency part 1120, and a signal processing part 1130.
  • the antenna 1110 is connected to the radio frequency part 1120.
  • the radio frequency part 1120 receives the information sent by the network device through the antenna 1110, and sends the information sent by the network device to the signal processing part 1130 for processing.
  • the signal processing part 1130 processes the information of the terminal equipment and sends it to the radio frequency part 1120
  • the radio frequency part 1120 processes the information of the terminal equipment and sends it to the network equipment via the antenna 1110.
  • the signal processing part 1130 may include a modem subsystem, which is used to process the various communication protocol layers of the data; it may also include a central processing subsystem, which is used to process the terminal device operating system and application layer; in addition, it may also Including other subsystems, such as multimedia subsystems, peripheral subsystems, etc., where the multimedia subsystem is used to control the terminal device camera, screen display, etc., and the peripheral subsystem is used to realize the connection with other devices.
  • the modem subsystem can be a separate chip.
  • the modem subsystem may include one or more processing elements 1131, for example, including a main control CPU and other integrated circuits.
  • the modem subsystem may also include a storage element 1132 and an interface circuit 1133.
  • the storage element 1132 is used to store data and programs, but the program used to execute the method executed by the terminal device in the above method may not be stored in the storage element 1132, but is stored in a memory outside the modem subsystem, When in use, the modem subsystem is loaded and used.
  • the interface circuit 1133 is used to communicate with other subsystems.
  • the modem subsystem can be implemented by a chip, the chip includes at least one processing element and an interface circuit, wherein the processing element is used to execute each step of any method executed by the above terminal device, and the interface circuit is used to communicate with other devices.
  • the unit for the terminal device to implement each step in the above method can be implemented in the form of a processing element scheduler.
  • the device for the terminal device includes a processing element and a storage element, and the processing element calls the program stored by the storage element to Perform the method performed by the terminal device in the above method embodiment.
  • the storage element may be a storage element whose processing element is on the same chip, that is, an on-chip storage element.
  • the program used to execute the method executed by the terminal device in the above method may be a storage element on a different chip from the processing element, that is, an off-chip storage element.
  • the processing element calls or loads a program from the off-chip storage element on the on-chip storage element to call and execute the method executed by the terminal device in the above method embodiment.
  • the unit of the terminal device that implements each step in the above method may be configured as one or more processing elements, and these processing elements are arranged on the modem subsystem, where the processing elements may be integrated circuits, For example: one or more ASICs, or, one or more DSPs, or, one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits can be integrated together to form a chip.
  • the units of the terminal device that implement each step in the above method can be integrated together and implemented in the form of an SOC, and the SOC chip is used to implement the above method.
  • the chip can integrate at least one processing element and a storage element, and the processing element can call the stored program of the storage element to implement the method executed by the above terminal device; or, the chip can integrate at least one integrated circuit to implement the above terminal The method executed by the device; or, it can be combined with the above implementations.
  • the functions of some units are implemented in the form of calling programs by processing elements, and the functions of some units are implemented in the form of integrated circuits.
  • the above apparatus for terminal equipment may include at least one processing element and an interface circuit, wherein at least one processing element is used to execute any of the methods performed by the terminal equipment provided in the above method embodiments.
  • the processing element can execute part or all of the steps executed by the terminal device in the first way: calling the program stored in the storage element; or in the second way: combining instructions through the integrated logic circuit of the hardware in the processor element Part or all of the steps performed by the terminal device are executed in a manner; of course, part or all of the steps executed by the terminal device can also be executed in combination with the first manner and the second manner.
  • the processing element here is the same as that described above, and can be implemented by a processor, and the function of the processing element can be the same as the function of the processing unit described in FIG. 10.
  • the processing element may be a general-purpose processor, such as a CPU, or one or more integrated circuits configured to implement the above method, such as: one or more ASICs, or, one or more microprocessors DSP , Or, one or more FPGAs, etc., or a combination of at least two of these integrated circuit forms.
  • the storage element may be realized by a memory, and the function of the storage element may be the same as the function of the storage unit described in FIG. 10.
  • the storage element may be realized by a memory, and the function of the storage element may be the same as the function of the storage unit described in FIG. 10.
  • the storage element can be a single memory or a collective term for multiple memories.
  • the terminal device shown in FIG. 11 can implement various processes involving the terminal device in the method embodiments illustrated in FIG. 5, FIG. 6, FIG. 7, and FIG. 8.
  • the operations and/or functions of the various modules in the terminal device shown in FIG. 11 are used to implement the corresponding processes in the foregoing method embodiments.
  • FIG. 12 is a schematic structural diagram of a network device provided by an embodiment of this application. It is used to implement the operation of the network device in the above embodiments (for example, the first network device or the second network device in Embodiment 1 to Embodiment 4).
  • the network equipment includes: an antenna 1201, a radio frequency device 1202, and a baseband device 1203.
  • the antenna 1201 is connected to the radio frequency device 1202.
  • the radio frequency device 1202 receives the information sent by the terminal device through the antenna 1201, and sends the information sent by the terminal device to the baseband device 1203 for processing.
  • the baseband device 1203 processes the information of the terminal device and sends it to the radio frequency device 1202, and the radio frequency device 1202 processes the information of the terminal device and sends it to the terminal device via the antenna 1201.
  • the baseband device 1203 may include one or more processing elements 12031, for example, a main control CPU and other integrated circuits.
  • the baseband device 1203 may also include a storage element 12032 and an interface 12033.
  • the storage element 12032 is used to store programs and data; the interface 12033 is used to exchange information with the radio frequency device 1202.
  • the interface is, for example, a common public radio interface. , CPRI).
  • the above apparatus for network equipment may be located in the baseband apparatus 1203.
  • the above apparatus for network equipment may be a chip on the baseband apparatus 1203.
  • the chip includes at least one processing element and an interface circuit, wherein the processing element is used to execute the above network. For each step of any method executed by the device, the interface circuit is used to communicate with other devices.
  • the unit for the network device to implement each step in the above method can be implemented in the form of a processing element scheduler.
  • the device for the network device includes a processing element and a storage element, and the processing element calls the program stored by the storage element to Perform the method performed by the network device in the above method embodiment.
  • the storage element may be a storage element with the processing element on the same chip, that is, an on-chip storage element, or a storage element on a different chip from the processing element, that is, an off-chip storage element.
  • the unit of the network device that implements each step in the above method may be configured as one or more processing elements, and these processing elements are arranged on the baseband device.
  • the processing elements here may be integrated circuits, such as one Or multiple ASICs, or, one or more DSPs, or, one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits can be integrated together to form a chip.
  • the units for the network equipment to implement each step in the above method can be integrated together and implemented in the form of a system-on-a-chip (SOC).
  • the baseband device includes the SOC chip for implementing the above method.
  • At least one processing element and storage element can be integrated in the chip, and the processing element can call the stored program of the storage element to implement the method executed by the above network device; or, at least one integrated circuit can be integrated in the chip to implement the above network The method executed by the device; or, it can be combined with the above implementations.
  • the functions of some units are implemented in the form of calling programs by processing elements, and the functions of some units are implemented in the form of integrated circuits.
  • the above apparatus for a network device may include at least one processing element and an interface circuit, wherein at least one processing element is used to execute any method performed by the network device provided in the above method embodiments.
  • the processing element can execute part or all of the steps executed by the network device in the first way: calling the program stored in the storage element; or in the second way: combining instructions through the integrated logic circuit of the hardware in the processor element Part or all of the steps performed by the network device are executed in the method; of course, part or all of the steps executed by the network device above can also be executed in combination with the first method and the second method.
  • the processing element here is the same as that described above, and can be implemented by a processor, and the function of the processing element can be the same as the function of the processing unit described in FIG. 10.
  • the processing element may be a general-purpose processor, such as a CPU, or one or more integrated circuits configured to implement the above method, such as: one or more ASICs, or, one or more microprocessors DSP , Or, one or more FPGAs, etc., or a combination of at least two of these integrated circuit forms.
  • the storage element may be realized by a memory, and the function of the storage element may be the same as the function of the storage unit described in FIG. 10.
  • the storage element may be realized by a memory, and the function of the storage element may be the same as the function of the storage unit described in FIG. 10.
  • the storage element can be a single memory or a collective term for multiple memories.
  • the network device shown in FIG. 12 can implement various processes involving the network device in the method embodiments illustrated in FIG. 5, FIG. 6, FIG. 7, and FIG. 8.
  • the operations and/or functions of the various modules in the network device shown in FIG. 12 are used to implement the corresponding processes in the foregoing method embodiments.
  • this application can be provided as methods, systems, or computer program products. Therefore, this application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device.
  • the device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
  • These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment.
  • the instructions provide steps for implementing the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

Abstract

La présente invention se rapporte au domaine technique des communications et concerne un procédé et un appareil de communication. Selon le procédé : après qu'un premier dispositif de réseau reçoit des informations en liaison descendante d'un dispositif terminal à partir d'un dispositif de réseau central, le premier dispositif de réseau peut envoyer un premier message à un second dispositif de réseau, le premier message comprenant des informations de capacité SUL du dispositif terminal, les informations de capacité SUL étant utilisées pour indiquer que le dispositif terminal supporte un support SUL, et le dispositif terminal étant dans un état inactif. Grâce au procédé, le premier dispositif de réseau envoie les informations de capacité SUL du dispositif terminal au second dispositif de réseau, de sorte que le second dispositif de réseau peut obtenir la capacité SUL du dispositif terminal ; en outre, le second dispositif de réseau peut ordonner, sur la base des informations de capacité SUL du dispositif terminal, au dispositif terminal d'effectuer une transmission en liaison montante sur le support SUL, ce qui permet de mettre en œuvre une transmission en liaison montante du dispositif terminal à l'état inactif sur le support SUL.
PCT/CN2021/078247 2020-02-28 2021-02-26 Procédé et appareil de communication WO2021170110A1 (fr)

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CN114026893A (zh) * 2021-09-30 2022-02-08 北京小米移动软件有限公司 一种sdt传输方法、装置及存储介质
CN117643154A (zh) * 2021-11-03 2024-03-01 Oppo广东移动通信有限公司 基于增强上行覆盖的传输方法、门限的配置方法以及装置

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