WO2021103026A1 - Procédé pour réaliser une communication sur une partie de bande passante - Google Patents

Procédé pour réaliser une communication sur une partie de bande passante Download PDF

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Publication number
WO2021103026A1
WO2021103026A1 PCT/CN2019/122271 CN2019122271W WO2021103026A1 WO 2021103026 A1 WO2021103026 A1 WO 2021103026A1 CN 2019122271 W CN2019122271 W CN 2019122271W WO 2021103026 A1 WO2021103026 A1 WO 2021103026A1
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WIPO (PCT)
Prior art keywords
bwp pair
bwp
rrc
terminal device
pair
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PCT/CN2019/122271
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English (en)
Chinese (zh)
Inventor
骆喆
陈雁
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201980102486.0A priority Critical patent/CN114731645A/zh
Priority to PCT/CN2019/122271 priority patent/WO2021103026A1/fr
Publication of WO2021103026A1 publication Critical patent/WO2021103026A1/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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • This application relates to the field of communication technology, and in particular to a method of communicating on a bandwidth part.
  • terminal devices in communication scenarios gradually show characteristics such as large numbers and multiple forms.
  • the industrial automation scenario there are a large number of monitoring equipment, machines, sensors, etc. in the factory; in the home and life scenarios, there are a large number of mobile phones, tablets, wearable devices, smart home appliances, or vehicle-mounted terminal devices, etc.
  • the embodiment of the present application provides a method for communicating on the bandwidth part (pair), which is used to reduce data congestion of terminal equipment, so as to improve the success rate of data transmission.
  • a method for communicating on a BWP pair in a bandwidth portion including: switching from a first BWP pair to a second BWP pair of a terminal device, and the downlink BWP of the first BWP pair is used for the terminal
  • Multiple terminal devices in the cell where the device is located receive paging messages from the network device, where the multiple terminal devices include the terminal device, and the radio resource control RRC of the terminal device is on the first BWP pair.
  • the state is the radio resource control_idle RRC_IDLE state or the radio resource control_inactive state RRC_INACTIVE state; the network device is accessed on the second BWP pair.
  • the first BWP pair is a common BWP pair.
  • a method for communicating on a BWP including: switching from a first BWP to a second BWP of a terminal device, the first BWP Multiple terminal devices in the cell where the terminal device is located receive paging messages from a network device, where the multiple terminal devices include the terminal device, and when the terminal device is on the first BWP, the terminal device’s
  • the radio resource control RRC state is the radio resource control_idle RRC_IDLE state or the radio resource control_inactive state RRC_INACTIVE state; the network device is accessed on the second BWP.
  • the first BWP is a public BWP.
  • the first BWP is used for multiple terminal devices in the cell where the terminal device is located to receive paging messages from the network device, including: downlink resources in the first BWP are used for multiple terminal devices in the cell where the terminal device is located Receive paging messages from network devices.
  • Accessing the network device on the second BWP includes: sending a PRACH or an access preamble to the network device on an uplink resource in the second BWP.
  • the terminal device when the terminal device is in the RRC_IDLE state or the RRC_INACTIVE state, it stays on the public first BWP (pair) and listens to paging messages. When the terminal device needs to access the network device, for example, it receives a paging message from the terminal device. Or, when triggered by a higher layer of the terminal device, switch from the public first BWP (pair) to the second BWP (pair) specific to the terminal device to access the network device on the second BWP (pair).
  • multiple terminal devices can be dispersed on their respective specific second BWPs (pairs) to access network devices, avoid access congestion, and improve the access success rate.
  • the method further includes: performing RRC establishment with the network device on the second BWP pair, and converting the RRC state of the terminal device from the RRC_IDLE state or RRC_INACTIVE state to radio resource control -Connected in RRC-CONNECTED state.
  • the terminal device after accessing the network device on the second BWP pair, the terminal device can establish an RRC connection with the network device, so that data specific to the terminal device can be transmitted.
  • the method further includes: performing RRC recovery with the network device on the second BWP pair, and the RRC state of the terminal device Transition from the RRC_INACTIVE state to the radio resource control-connected RRC-CONNECTED state.
  • the terminal device after accessing the network device on the second BWP pair, the terminal device can perform RRC recovery with the network device and restore the RRC connection with the network device, so that the terminal device specific data can be transmitted.
  • the switching from the first BWP pair to the second BWP pair includes: after receiving the paging message of the terminal device on the downlink BWP of the first BWP pair, or After being triggered by the higher layer of the terminal device, it switches from the first BWP pair to the second BWP pair.
  • the configuration of the second BWP pair is predefined.
  • the signaling overhead for configuring the second BWP pair can be saved.
  • the method further includes: receiving the configuration of the second BWP pair from the network device.
  • the second BWP pair can be configured according to the channel conditions of the terminal device, so that the channel quality of the second BWP pair is better when the data of the terminal device is transmitted, and the data transmission success rate is high.
  • the configuration of the second BWP pair is indicated by a radio resource control-release RRC-release message, a paging message, a broadcast channel, or a system message.
  • the terminal device can learn the configuration information of the second BWP pair in time.
  • the configuration of the second BWP pair can also be updated according to channel conditions or system load, thereby increasing the success rate of data transmission or reducing data transmission delay .
  • the configuration of the second BWP pair is used to indicate that the PDCCH and/or PDSCH transmitted on the downlink BWP of the second BWP pair is a channel of a quasi-co-located QCL.
  • the QCL channels of the PDCCH and the PDSCH may be the same or different, which is not limited in the embodiment of the present application.
  • the configuration of the second BWP pair is used to indicate that the physical downlink control channel PDCCH transmitted on the downlink BWP of the second BWP pair and the synchronization signal block SSB transmitted on the downlink BWP of the first BWP pair are QCL
  • the configuration of the second BWP pair is used to indicate that the physical downlink shared channel PDSCH transmitted on the downlink BWP of the second BWP pair and the SSB transmitted on the downlink BWP of the first BWP pair are QCL .
  • the terminal equipment can use the SSB to obtain the channel estimation, and use the channel estimation result to demodulate the PDCCH and/or PDSCH, so that the terminal equipment does not need to perform additional channel estimation for the PDCCH or PDSCH, reducing the implementation complexity and saving the terminal equipment’s cost. Power consumption.
  • the method further includes: determining the second BWP pair according to the identifier of the terminal device.
  • the second BWP pair is determined from a set of candidate second BWP pairs according to the identifier of the terminal device. Through this method, the signaling overhead for configuring the second BWP pair can be saved.
  • the configuration of the second BWP pair in the candidate second BWP pair set is predefined; or, it is indicated by the radio resource control-release RRC-release message, paging message, broadcast channel or system message.
  • the configuration of the second BWP pair is used to indicate that the PDCCH and/or PDSCH transmitted on the downlink BWP of the second BWP pair is a channel of a quasi-co-location QCL.
  • a method for communicating on a BWP pair in a bandwidth portion including: switching from a first BWP pair to a second BWP pair of a terminal device, and the downlink BWP of the first BWP pair is used for the terminal
  • Multiple terminal devices in the cell where the device is located receive paging messages from the network device, where the multiple terminal devices include the terminal device, and the radio resource control RRC of the terminal device is on the first BWP pair.
  • the state is the radio resource control_inactive state RRC_INACTIVE state; the specific information of the terminal device is transmitted to the network device on the second BWP pair, wherein, when the second BWP pair is on, the The RRC state of the terminal device is the RRC_INACTIVE state.
  • the first BWP pair is a public BWP pair.
  • the method further includes: switching from the second BWP pair to the first BWP pair after the second BWP pair transmits the specific information of the terminal device with the network device. After switching from the second BWP pair to the first BWP pair, stay on the first BWP pair again. You can monitor the paging message from the network device on the downlink BWP of the first BWP pair, and you can also use the Receive synchronization signals, physical broadcast channels and system messages on the downlink BWP.
  • a method for communicating on the bandwidth part of the BWP including: switching from the first BWP to the second BWP of the terminal device, the first BWP A BWP is used for multiple terminal devices in the cell where the terminal device is located to receive paging messages from a network device, where the multiple terminal devices include the terminal device, and the terminal is on the first BWP.
  • the radio resource control RRC state of the device is the radio resource control_inactive state RRC_INACTIVE state; the specific information of the terminal device is transmitted with the network device on the second BWP, wherein, on the second BWP At this time, the RRC state of the terminal device is the RRC_INACTIVE state.
  • the first BWP is the public BWP.
  • the method further includes: switching from the second BWP to the first BWP after transmitting the specific information of the terminal device with the network device on the second BWP.
  • Performing the transmission of specific information of the terminal device with the network device on the second BWP includes: performing the specific uplink information of the terminal device with the network device on the uplink resource of the second BWP And/or, on the downlink resource of the second BWP, and the network device perform transmission of specific downlink information of the terminal device.
  • the terminal device when the terminal device is in the RRC_INACTIVE state, it stays on the public first BWP (pair) to listen for paging messages.
  • the terminal device needs to transmit data with the network device, for example, it receives a paging message from the terminal device or When triggered by the upper layer of the terminal device, it switches from the public first BWP (pair) to the second BWP (pair) specific to the terminal device, and performs data transmission with the network device on the second BWP (pair).
  • the terminal device can switch back to the first BWP (pair) to reside.
  • a method for communicating on a BWP pair with a bandwidth portion including: sending a broadcast message, a paging message, and system information to multiple terminal devices in a cell where the terminal device is located on the first BWP pair One or more of, wherein the multiple terminal devices include the terminal device, and the radio resource control RRC state of the terminal device when the first BWP pair is connected is the radio resource control_idle RRC_IDLE state or Radio resource control_inactive state RRC_INACTIVE state; a random access process is performed with the terminal device on the second BWP pair of the terminal device.
  • the first BWP pair is a common BWP pair.
  • a method for communicating on a BWP pair with a bandwidth portion includes: sending a broadcast message and a paging message to multiple terminal devices in the cell where the terminal device is located on the first BWP pair , And one or more of system information, wherein the multiple terminal devices include the terminal device, and the radio resource control RRC state of the terminal device when the first BWP is paired is radio resource control_ Inactive state RRC_INACTIVE state; the terminal device transmits specific information of the terminal device with the terminal device on the second BWP pair of the terminal device, wherein, when the second BWP pair is on, the terminal device’s The RRC state is the RRC_INACTIVE state.
  • the first BWP pair is a common BWP pair.
  • a device in a fifth aspect, may be a terminal device, or a device in a terminal device, or a device that can be matched and used with the terminal device.
  • the device may include modules that perform one-to-one correspondence of the methods/operations/steps/actions described in the first aspect and/or the second aspect.
  • the modules may be hardware circuits, software, or It is realized by hardware circuit combined with software.
  • the device may include a processing module and a communication module to implement the method described in the first aspect and/or the second aspect.
  • the processing module is used to switch from the first BWP pair to the second BWP pair of the terminal device, and the downlink BWP of the first BWP pair is used for multiple terminal devices in the cell where the terminal device is located.
  • a paging message is received from a network device, where the multiple terminal devices include the terminal device, and the radio resource control RRC state of the terminal device when the first BWP pair is connected is the radio resource control_idle RRC_IDLE state or Radio resource control_inactive state RRC_INACTIVE state; the processing module uses the communication module to access the network device on the second BWP pair.
  • the first BWP pair is a common BWP pair.
  • the processing module is used to switch from the first BWP pair to the second BWP pair of the terminal device, and the downlink BWP of the first BWP pair is used for multiple terminal devices in the cell where the terminal device is located.
  • a paging message is received from a network device, where the multiple terminal devices include the terminal device, and the radio resource control RRC state of the terminal device when the first BWP pair is connected is radio resource control_inactive state RRC_INACTIVE
  • the processing module uses the communication module to transmit the specific information of the terminal device to the network device on the second BWP pair, wherein, when the second BWP pair is on, the RRC of the terminal device The state is RRC_INACTIVE state.
  • the first BWP pair is a common BWP pair.
  • a device in a sixth aspect, may be a network device, a device in a network device, or a device that can be matched and used with the network device.
  • the device may include modules that perform one-to-one correspondence of the methods/operations/steps/actions described in the third aspect and/or the fourth aspect.
  • the modules may be hardware circuits, software, or It is realized by hardware circuit combined with software.
  • the device may include a processing module and a communication module to implement the method described in the third aspect and/or the fourth aspect.
  • the processing module uses a communication module: on the first BWP pair, one or more of a broadcast message, a paging message, and system information is sent to multiple terminal devices in the cell where the terminal device is located, wherein, the multiple terminal devices include the terminal device, and the radio resource control RRC state of the terminal device when the first BWP pair is connected is the radio resource control_idle RRC_IDLE state or the radio resource control_inactive state RRC_INACTIVE State; On the second BWP pair of the terminal device, perform a random access procedure with the terminal device.
  • the first BWP pair is a common BWP pair.
  • the processing module uses a communication module: on the first BWP pair, one or more of a broadcast message, a paging message, and system information is sent to multiple terminal devices in the cell where the terminal device is located,
  • the plurality of terminal devices include the terminal device, and the radio resource control RRC state of the terminal device when the first BWP pair is in the radio resource control_inactive state RRC_INACTIVE state;
  • the second BWP pair performs transmission of specific information of the terminal device with the terminal device, wherein, when the second BWP pair is connected, the RRC state of the terminal device is the RRC_INACTIVE state.
  • the first BWP pair is a common BWP pair.
  • an apparatus configured to implement the methods described in the first aspect and/or the second aspect.
  • the device includes a memory for storing instructions and data.
  • the memory is coupled with the processor, and when the processor executes the instructions stored in the memory, the method described in the first aspect and/or the second aspect can be implemented.
  • the device may also include a communication interface for the device to communicate with other devices.
  • the communication interface may be a transceiver, circuit, bus, module, pin, or other type of communication interface.
  • the device can be a network device.
  • the device includes: a memory for storing instructions; a processor for switching from a first BWP pair to a second BWP pair of the terminal device, and the downlink BWP of the first BWP pair is used for Multiple terminal devices in the cell where the terminal device is located receive paging messages from the network device, where the multiple terminal devices include the terminal device, and when the first BWP is paired, the terminal device’s wireless
  • the resource control RRC state is the radio resource control_idle RRC_IDLE state or the radio resource control_inactive state RRC_INACTIVE state; the processor uses the communication interface to access the network device on the second BWP pair.
  • the first BWP pair is a common BWP pair.
  • the device includes: a memory for storing instructions; a processor for switching from a first BWP pair to a second BWP pair of the terminal device, and the first BWP pair is used for the terminal
  • Multiple terminal devices in the cell where the device is located receive paging messages from the network device, where the multiple terminal devices include the terminal device, and the radio resource control RRC state of the terminal device when on the first BWP It is the radio resource control_inactive state RRC_INACTIVE state; the processor uses the communication interface to transmit the specific information of the terminal device to the network device on the second BWP pair of the terminal device.
  • the RRC state of the terminal device is the RRC_INACTIVE state.
  • the first BWP pair is a common BWP pair.
  • an apparatus in an eighth aspect, includes a processor, and is configured to implement the method described in the third aspect and/or the fourth aspect.
  • the device includes a memory for storing instructions and data.
  • the memory is coupled with the processor, and when the processor executes the instructions stored in the memory, the method described in the third aspect and/or the fourth aspect can be implemented.
  • the device may also include a communication interface, which is used for the device to communicate with other devices.
  • the communication interface may be a transceiver, circuit, bus, module, pin, or other type of communication interface.
  • the device can be a terminal device.
  • the device includes: a memory, used to store instructions; a processor, used to use a communication interface: on the first BWP pair, send broadcast messages and search to multiple terminal devices in the cell where the terminal device is located.
  • a call message and system information wherein the multiple terminal devices include the terminal device, and the radio resource control RRC state of the terminal device when the first BWP is paired is radio resource Control_idle RRC_IDLE state or radio resource control_inactive state RRC_INACTIVE state; perform a random access process with the terminal device on the second BWP pair of the terminal device.
  • the first BWP pair is a common BWP pair.
  • the device includes: a memory, used to store instructions; a processor, used to use a communication interface: on the first BWP pair, send broadcast messages and search to multiple terminal devices in the cell where the terminal device is located.
  • a call message and system information wherein the multiple terminal devices include the terminal device, and the radio resource control RRC state of the terminal device when the first BWP is paired is radio resource Control_inactive state RRC_INACTIVE state; the terminal device transmits the specific information of the terminal device on the second BWP pair of the terminal device, wherein, when the second BWP pair is on, the terminal device
  • the RRC state of the device is the RRC_INACTIVE state.
  • the first BWP pair is a common BWP pair.
  • a computer-readable storage medium including instructions, which when run on a computer, cause the computer to execute at least one of the methods described in the first to fourth aspects.
  • a computer program product including instructions, which when run on a computer, cause the computer to execute at least one method described in the first to fourth aspects.
  • a chip system in an eleventh aspect, includes a processor and may also include a memory for implementing at least one of the methods described in the first to fourth aspects.
  • the chip system can be composed of chips, or it can include chips and other discrete devices.
  • a system in a twelfth aspect, includes the device (such as a terminal device) described in the fifth aspect or the seventh aspect and the device (such as a network device) described in the sixth aspect or the eighth aspect.
  • FIG. 1 shows an example diagram of communication between a base station and a UE on a BWP pair provided by an embodiment of the present application
  • FIG. 2 shows an example flow chart of a technical solution provided by an embodiment of the present application
  • FIG. 3 shows an example diagram of UE RRC state transition provided by an embodiment of the present application
  • 4A and 4B show example diagrams of the flow of UE accessing a base station provided by an embodiment of the present application
  • 5A to 5L are exemplary diagrams of the flow of UE-specific information transmission by a UE in the RRC_INACTIVE state provided by an embodiment of the present application using the second BWP pair;
  • FIGS 6 and 7 show example diagrams of devices provided by embodiments of the present application.
  • LTE long term evolution
  • 5G fifth generation
  • WiFi wireless-fidelity
  • future communication system or a system integrating multiple communication systems, etc.
  • 5G can also be called new radio (NR).
  • eMBB enhanced mobile broadband
  • URLLC ultra-reliable low-latency communication
  • MTC machine type communication
  • mMTC massive machine type communications
  • D2D device-to-device
  • V2X vehicle to everything
  • V2V vehicle to vehicle
  • IoT internet of things
  • Communication between communication devices may include: communication between a network device and a terminal device, communication between a network device and a network device, and/or communication between a terminal device and a terminal device.
  • the term “communication” can also be described as “transmission”, “information transmission”, or “signal transmission” and so on. Transmission can include sending and/or receiving.
  • the communication between network equipment and terminal equipment is used as an example to describe the technical solution. Those skilled in the art can also use this technical solution for communication between other scheduling entities and subordinate entities, such as macro base stations and micro base stations.
  • Air interface resources include one or more of the following resources: time domain resources, frequency domain resources, code resources, and space resources.
  • the multiple types may be two, three, four, or more types, which are not limited in the embodiments of the present application.
  • the communication between the network device and the terminal device includes: the network device sends a downlink signal/information to the terminal device, and/or the terminal device sends an uplink signal/information to the network device.
  • "/" can indicate that the associated objects are in an "or” relationship.
  • A/B can indicate A or B; and "and/or” can be used to describe that there are three types of associated objects.
  • the relationship, for example, A and/or B can mean that: A alone exists, A and B exist at the same time, and B exists alone. Among them, A and B can be singular or plural.
  • words such as “first” and “second” may be used to distinguish technical features with the same or similar functions. The words “first” and “second” do not limit the quantity and order of execution, and the words “first” and “second” do not limit the difference.
  • words such as “exemplary” or “for example” are used to indicate examples, illustrations, or illustrations, and embodiments or design solutions described as “exemplary” or “for example” should not be interpreted as It is more preferable or advantageous than other embodiments or design solutions.
  • the use of words such as “exemplary” or “for example” is intended to present related concepts in a specific manner to facilitate understanding.
  • the terminal device involved in the embodiments of this application can also be called a terminal, which can be a device with wireless transceiver function, which can be deployed on land, including indoors, outdoors, and/or handheld or vehicle-mounted; it can also be deployed on the water (Such as ships, etc.); it can also be deployed in the air (such as airplanes, balloons, satellites, etc.).
  • the terminal device may be a user equipment (UE), and the UE includes a handheld device with a wireless communication function, a vehicle-mounted device, a wearable device, or a computing device.
  • the UE may be a mobile phone, a tablet computer, or a computer with a wireless transceiver function.
  • Terminal equipment can also be virtual reality (VR) terminal equipment, augmented reality (AR) terminal equipment, wireless terminals in industrial control, wireless terminals in unmanned driving, wireless terminals in telemedicine, and smart Wireless terminals in power grids, wireless terminals in smart cities, and/or wireless terminals in smart homes, etc.
  • VR virtual reality
  • AR augmented reality
  • Wireless terminals in power grids wireless terminals in smart cities, and/or wireless terminals in smart homes, etc.
  • the device used to realize the function of the terminal device may be a terminal device; it may also be a device that can support the terminal device to realize the function, such as a chip system.
  • the device may be installed in the terminal device or connected to the terminal device. Matching use.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the device used to implement the functions of the terminal equipment is the terminal equipment, and the terminal equipment is the UE as an example to describe the technical solutions provided in the embodiments of the present application.
  • the network device involved in the embodiment of the present application includes a base station (BS), which may be a device that is deployed in a wireless access network and can communicate with terminal devices wirelessly.
  • Base stations may come in many forms, such as macro base stations, micro base stations, relay stations, and access points.
  • the base station involved in the embodiment of the present application may be a base station in a 5G system or a base station in an LTE system.
  • the base station in the 5G system may also be called a transmission reception point (TRP) or a next-generation node B (generation Node B, gNB or gNodeB).
  • TRP transmission reception point
  • gNB next-generation node B
  • the device used to implement the function of the network device may be a network device; it may also be a device that can support the network device to implement the function, such as a chip system, and the device may be installed in the network device or combined with the network device. Matching use.
  • the device used to implement the functions of the network equipment is the network equipment, and the network equipment is a base station as an example to describe the technical solutions provided by the embodiments of the present application.
  • the UE can access the base station and communicate with the base station.
  • a base station can manage one or more (for example, 3 or 6, etc.) cells, and the UE can access the base station in at least one of the one or more cells.
  • the cell communicates with the base station.
  • at least one may be one, two, three, or more, which is not limited in the embodiments of the present application.
  • FIG. 1 shows an example diagram of communication between a base station and a UE on a bandwidth part (BWP) pair (BWP).
  • BWP bandwidth part
  • the UE after powering on, when the UE wants to access the base station, it can receive synchronization signals and broadcast channels from the base station, and can receive system information from the base station, such as receiving system information block (SIB)1.
  • the system information may indicate the configuration information of the initial (initial) BWP pair, and the UE may access the base station on the initial BWP pair.
  • the UE After the UE establishes a radio resource control (Radio Resource Control, RRC) connection with the base station during or after accessing the base station, the state of the UE is the RRC connected (RRC_CONNECTED) state.
  • RRC Radio Resource Control
  • the UE and the base station can perform data transmission on the initial BWP pair.
  • the base station may configure at least one BWP pair for the UE through signaling (the configured BWP pair of the UE), and may configure the active BWP pair for the UE from the at least one BWP pair.
  • the UE can send a physical uplink shared channel (PUSCH) to the base station on the activated BWP pair and/or receive a specific physical downlink shared channel of the UE from the base station (physical downlink shared channel, PDSCH).
  • PUSCH physical uplink shared channel
  • PDSCH physical downlink shared channel
  • the activated BWP pair may be the same as or different from the initial BWP pair, which is not limited in the embodiment of the present application.
  • the base station can reconfigure the active BWP pair of the UE, and/or reconfigure the configured BWP pair of the UE.
  • the RRC release process goes through, when the state of the UE changes from the RRC_CONNECTED state to the RRC idle (RRC_IDLE) state or the RRC inactive (RRC_INACTIVE) state, the UE switches from the active BWP pair to the above-mentioned initial BWP pair to transfer from the base station Receiving paging messages, synchronization signals, broadcast channels, and/or system information, etc., that is, the UE camps on the initial BWP pair.
  • the UE accesses the base station on the initial BWP pair, for example, performs a random access process on the initial BWP pair , RRC establishment process, and/or RRC recovery process, etc.
  • NR-lite new radio-lite
  • the characteristics of NR-lite UE include at least one of the following: support for smaller bandwidth, require low power consumption, and/or be used for burst small packet transmission.
  • the UE may also be called a light UE, a simple UE, or other names, which is not limited in the embodiment of the present application.
  • the UE can be set to RRC_IDLE state or RRC_INACTIVE state; when the UE has new packet transmission , The UE accesses the base station from the initial BWP pair, establishes an RRC connection with the base station, and switches to the RRC_CONNECTED state.
  • the initial BWP pair is a public BWP pair in the cell, and its bandwidth is usually narrow, it will exist when there are many NR-lite UEs in a communication scenario and frequent switching between RRC_IDLE state or RRC_INACTIVE state and RRC_CONNECTED state is required.
  • a large number of NR-lite UEs simultaneously access the base station on the same narrowband BWP pair, resulting in congestion and a low access success rate.
  • the narrow bandwidth of the initial BWP pair will cause data congestion and the data transmission delay will be large. .
  • the embodiments of this application take NR-lite UE as an example to illustrate the technical problems, but the embodiments of this application can be applied to various types of UEs, for example, it can also be used for legacy UEs, or ordinary UEs, etc., to improve the access of UEs. Into the success rate or improve the user experience.
  • the embodiments of the present application provide a new method for communicating on BWP (pair), which can be used for both BWP pair-based design and BWP-based design.
  • one BWP in the design based on the BWP pair: one BWP can be used for downlink signal transmission or uplink signal transmission, but it cannot be used for both downlink signal transmission and uplink signal transmission.
  • one or more BWP pairs can be configured for the UE from the carrier's resources for communication between the base station and the UE.
  • a BWP pair may include at least one downlink BWP and at least one uplink BWP.
  • a BWP pair includes a downlink BWP and an uplink BWP, or a BWP pair includes a downlink BWP, an uplink BWP, and a supplementary uplink (SUL) BWP.
  • a BWP for example, a downlink BWP or an uplink BWP, may include a continuous frequency domain resource, for example, including several continuous subcarriers, resource blocks (resource block, RB), or resource block group (resource block group, RBG) and so on.
  • downlink signal transmission is performed on the downlink BWP in the BWP pair, and the downlink signal is sent from the base station to the UE; on the uplink BWP in the BWP pair Perform uplink signal transmission, and the uplink signal is sent from the UE to the base station.
  • the base station sends a paging message, synchronization signal, broadcast channel, physical downlink control channel (PDCCH), physical downlink shared channel (PDSCH), and/ Or a reference signal, etc.; and/or, the UE sends a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), and/or a reference signal to the base station on the uplink BWP.
  • PDCCH physical downlink control channel
  • PDSCH physical downlink shared channel
  • PUSCH physical uplink control channel
  • the base station may configure one or more (for example, 2, 3, 4, or other numbers) candidate BWP pairs for the UE, and the base station may configure at least one candidate BWP pair for the UE from the one or more candidate BWP pairs.
  • the activated BWP pair can be used for data transmission between the base station and the UE.
  • a BWP in a BWP-based design: a BWP can be used for both downlink signal transmission and uplink signal transmission.
  • one or more BWPs can be configured for the UE from the carrier's resources for communication between the base station and the UE.
  • a BWP may include a continuous frequency domain resource, for example, including several continuous subcarriers, or resource blocks (resource block, RB).
  • the BWP may include an uplink part and/or a downlink part.
  • the base station and the UE when the base station and the UE communicate on the BWP, if the BWP includes a downlink resource part, the base station sends a paging message, synchronization signal, broadcast channel, and PDCCH to the UE on the downlink resource part of the BWP , PDSCH, and/or reference signal; and/or, if the BWP includes an uplink resource part, the UE sends the PUSCH, PUCCH, and/or reference signal to the base station on the uplink resource part of the BWP.
  • the base station may configure one or more candidate BWPs for the UE, and the base station may configure at least one activated BWP for the UE from the one or more candidate BWPs, and the activated BWP is used for data transmission between the base station and the UE.
  • the method provided in the embodiments of the present application is applicable to both the above-mentioned BWP pair-based design and the above-mentioned BWP-based design.
  • the technical solution provided by the embodiments of this application is described by taking the design based on the BWP pair as an example.
  • the BWP pair is replaced with BWP (for example, marked as BWP A), then Replace the uplink BWP in the BWP pair with BWP A (for example, the uplink resource part in BWP A), and replace the downlink BWP in the BWP pair with BWP A (for example, the downlink resource part in BWP A), that is, the downlink BWP in the BWP pair and
  • BWP A for example, the downlink resource part in BWP A
  • the BWP (including the uplink BWP, the downlink BWP, or the BWP introduced in the BWP-based design) in the technical solution provided in the embodiments of the application is intended to describe the resources used for communication, and the BWP can also be replaced with a sub Band, a section of transmission bandwidth, and/or component carrier, etc., are not limited in the embodiment of the present application.
  • FIG. 2 shows an example flowchart of a technical solution provided by an embodiment of the application.
  • the RRC state of the UE is the RRC_IDLE state or the RRC_INACTIVE state, and the UE resides in the first BWP pair.
  • the UE can access the base station and communicate with the base station.
  • the UE can perform an RRC establishment process with the base station.
  • the RRC state of the UE is the RRC_CONNECTED state.
  • the RRC state of the UE can be converted in the following states: RRC_IDLE state, RRC_CONNECTED state, and RRC_INACTIVE state.
  • FIG. 3 shows an example diagram of the RRC state transition of the UE provided in an embodiment of the application. As shown in Figure 3:
  • the base station can use the RRC release process, such as sending an RRC release (RRCRelease) message to the UE, so that the state of the UE changes from the RRC_CONNECTED state to the RRC_IDLE state or the RRC_INACTIVE state.
  • RRC release RRCRelease
  • the base station knows that the UE is within the coverage of the base station or is within the management range of the base station. For example, the base station knows that the UE is within the coverage of the cell managed by the base station; the core network knows which base station the UE is in. Within or within the management range, the core network knows through which base station the UE can be located or found.
  • the base station and the UE can transmit the UE-specific data channel and/or control channel, so that the UE-specific information or unicast information can be transmitted.
  • the base station may send UE-specific physical downlink control channel (PDCCH) and/or PDSCH to the UE, and/or the UE may send UE-specific PUSCH and/or physical uplink control channel (physical uplink control channel) to the base station. , PUCCH).
  • PDCH physical downlink control channel
  • PDSCH physical downlink control channel
  • PUCCH physical uplink control channel
  • the UE-specific PDCCH satisfies one or more of the following conditions: the resource location of the PDCCH is specific to the UE, and the cyclic redundancy check (CRC) of the PDCCH is passed the identity of the UE
  • the PDCCH is used to schedule the UE-specific PDSCH or PUSCH.
  • the PDCCH used to schedule PDSCH and/or PUSCH can also be described as: the PDCCH is used to carry transmission parameters of the PDSCH and/or PUSCH.
  • the transmission parameters of PDSCH or PUSCH include one or more of the following parameters: time domain resource location, frequency domain resource location, modulation and coding scheme (MCS), modulation mechanism, coding mechanism, transport block size (transport block size, TBS), redundancy version (redundancy version, RV), frequency hopping indicator, and power control command.
  • MCS modulation and coding scheme
  • the UE’s identity may be the UE’s cell radio network temporary identifier (C-RNTI) or other types of UE’s radio network temporary identifier (RNTI). .
  • the UE-specific PDSCH satisfies one or more of the following conditions: the transmission parameters of the PDSCH are specific to the UE or specific to the UE group in which the UE is located, and the PDSCH is scheduled by the UE-specific PDCCH, The CRC of the PDSCH is scrambled by the identity of the UE, and the information carried on the PDSCH is specific to the UE or specific to the UE group in which the UE is located.
  • the UE-specific PUSCH satisfies one or more of the following conditions: the transmission parameters of the PUSCH are specific to the UE or specific to the UE group where the UE is located, and the PUSCH is scheduled by the UE-specific PDCCH, The CRC of the PUSCH is scrambled by the identity of the UE, and the information carried on the PUSCH is specific to the UE or specific to the UE group in which the UE is located.
  • the UE-specific PUCCH satisfies one or more of the following conditions: the transmission parameters of the PUCCH are specific to the UE or specific to the UE group where the UE is located, and the CRC of the PUCCH is scrambled by the identity of the UE Yes, the information carried on the PUCCH is specific to the UE or specific to the UE group in which the UE is located.
  • the UE can change the state of the UE from the RRC_IDLE state to the RRC_CONNECTED state through the RRC establishment process.
  • the UE can initiate an RRC establishment process and try to establish an RRC connection with the base station to enter the RRC_CONNECTED state.
  • the RRC setup process between the UE and the base station includes: the UE sends an RRC setup request (RRCSetupResuest) message to the base station, and after receiving the request: the base station sends an RRC setup (RRCSetup) message to the UE, so that the state of the UE can be converted to RRC_CONNECTED Or, the base station sends an RRC reject (RRCReject) message to the UE, so that the UE continues to stay in the RRC_IDLE state.
  • RRC setup request RRCSetupResuest
  • RRCSetup RRC setup
  • RRCReject RRC reject
  • the base station When the UE is in the RRC_IDLE state, there is no connection between the UE and the base station. At this time, the base station does not know whether the UE is within the coverage area of the base station or whether it is within the management range of the base station. For example, the base station does not know whether the UE is within the coverage area of the cell managed by the base station; the core network does not know the UE. Within the coverage or management range of which base station, the core network does not know which base station can locate or find the UE.
  • the UE can receive paging messages, synchronization signals, broadcast messages, and/or system information from the base station. At this time, the UE cannot perform unicast data transmission with the base station, for example, cannot receive the UE-specific PDSCH and PDCCH from the base station, or cannot send the UE-specific PUSCH and PUCCH to the base station.
  • scenarios where the higher layers of the UE trigger the UE to initiate the RRC establishment process include but are not limited to: the UE needs to send information to the base station.
  • the service data adaptation protocol (SDAP) layer of the UE the packet data convergence protocol (PDCP) layer, and/or the radio link control (RLC) layer
  • SDAP service data adaptation protocol
  • PDCP packet data convergence protocol
  • RLC radio link control
  • the RRC layer triggers the RRC layer of the UE and the base station to perform the RRC establishment process
  • the RRC layer of the UE triggers the media access control (MAC) layer of the UE and the base station to perform the access process, so as to interact with each other during or after the access.
  • the base station performs the RRC establishment process.
  • the UE can change the state of the UE from the RRC_INACTIVE state to the RRC_CONNECTED state through the RRC establishment or RRC resume process; the base station can make the state of the UE change from the RRC_INACTIVE state to the RRC_IDLE state through the RRC release process.
  • the UE can initiate an RRC recovery process, trying to restore the RRC connection with the base station to enter the RRC_CONNECTED state.
  • the RRC recovery process between the UE and the base station includes: the UE sends an RRC recovery request (RRCResumeResuest) message to the base station, and after receiving the request: the base station sends an RRC setup (RRCSetup) message or an RRC recovery (RRCResume) message to the UE, so that The state of the UE can be converted to the RRC_CONNECTED state; or, the base station sends an RRC release (RRCRelease) message to the UE, so that the state of the UE changes from the RRC_INACTIVE state to the RRC_IDLE state; or, the base station sends an RRC reject (RRCReject) message to the UE to make the UE continue Stay in the RRC_INACTIVE state.
  • the base station When the UE is in the RRC_INACTIVE state, there is no connection between the UE and the base station. At this time, the base station does not know whether the UE is within the coverage of the base station or is within the management range of the base station. For example, the base station does not know whether the UE is within the coverage of the cell managed by the base station; the core network knows that the UE is within the coverage area of the base station. Within the coverage or management range of which base station, the core network knows through which base station the UE can be located or found.
  • the UE When the UE is in the RRC_INACTIVE state, the UE can receive paging messages, synchronization signals, broadcast messages, and/or system information from the base station.
  • the UE camps on the first BWP pair, and the downlink BWP of the first BWP pair is used to receive the paging message from the base station, and the first BWP pair may be the initial BWP pair described above.
  • the downlink BWP of the first BWP pair can also be used to receive one or more of the following information from the base station: synchronization signal (synchronization signal, SS), physical broadcast channel (physical broadcast channel, PBCH), and system information.
  • the synchronization signal may be an independent signal, such as (synchronization signal, SS); it may also include multiple separate signals, such as a primary synchronization signal (PSS) and a secondary synchronization signal (PSS). SSS).
  • the PSS, SSS, and PBCH can be sent in a separate form or can be sent in a combined form, which is not limited in the embodiment of the present application.
  • the combination may be called a synchronization signal block (synchronization signal block, SSB).
  • the information carried on the PBCH may also be referred to as a master information block (master information block, MIB).
  • the system information can be carried on the PDSCH in the form of a system information block (SIB).
  • SIB system information block
  • the PDSCH can be regarded as a common PDSCH and can be received by all UEs in the cell.
  • the UE camping on the first BWP pair can also be described as: the RRC state of the UE is the RRC_INACTIVE state or the RRC_CONNECTED state, and the UE monitors the paging message on the first BWP pair.
  • the UE may also receive SSB and/or system information from the base station on the first BWP pair.
  • the first BWP pair is a common BWP pair, and is used for multiple UEs in the cell where the UE is located to receive the above-mentioned paging message, SSB, and/or system information. For example, it is used for all UEs in the cell where the UE is located, or used for a group of UEs in the cell where the UE is located.
  • the group of UEs are multiple UEs in a cell where the UE is located, and the group of UEs includes the UE.
  • a group of UEs may include 2, 3, 4, 5, or more UEs, which is not limited in the embodiment of the present application.
  • the UE switches from the first BWP pair to the second BWP pair, and transmits UE-specific information between the second BWP and the base station, or accesses the base station.
  • the RRC state of the UE is the RRC_CONNECTED state, and the base station and the UE can perform UE-specific data channel and/or control channel transmission. It is assumed that when the state of the UE is the RRC_CONNECTED state, the UE works on the fourth BWP pair.
  • the fourth BWP pair may be the same as or different from the first BWP pair, the second BWP pair, or the third BWP pair, which is not limited in the embodiment of the present application.
  • the base station can send an RRC release message to the UE, so that the state of the UE transitions to the RRC_IDLE state or the RRC_INACTIVE state, and the UE switches from the fourth BWP pair to the first BWP pair, and camps on the first BWP pair. Listen to the paging message. After being triggered by higher layers of the UE, or after the UE receives a paging message from the base station on the downlink BWP of the first BWP pair, the UE switches from the first BWP pair to the second BWP pair, and the UE accesses the base station on the second BWP pair, Or, perform UE-specific information transmission with the base station on the second BWP pair.
  • the base station may also send one or more of a paging message, a synchronization signal, a PBCH, and a system message for the UE on the second BWP pair.
  • the UE when the UE is in the RRC_IDLE state or RRC_INACTIVE state, it stays on the public first BWP pair and listens for paging messages.
  • the UE switches from the public first BWP pair to the UE To access the base station on the second BWP pair, or perform UE-specific information transmission with the base station on the second BWP pair.
  • multiple UEs can be dispersed on their specific second BWP pair to access the base station or perform information transmission, avoiding congestion.
  • the second BWP pair is specific to the UE or specific to the UE group in which the UE is located.
  • the first BWP pair is used for all UEs in the cell where the UE is located, and the second BWP pair is specific to the UE or specific to the first UE group where the UE is located.
  • the UE is included in the first UE group.
  • the first BWP pair is used for the second UE group in the cell, and the second BWP pair is specific to the UE.
  • the specific second BWP pairs of different UEs may be the same or different, which is not limited in the embodiment of the present application.
  • the UE is included in the second UE group.
  • the foregoing first UE group and the second UE group may be the same or different, which is not limited in the embodiment of the present application.
  • design 1 and design 2 may exist.
  • Design 1 When camping on the first BWP pair, the RRC state of the UE is RRC_IDLE state or In the RRC_INACTIVE state, the UE accesses the base station on the second BWP pair.
  • the method can be described as: the UE switches from the first BWP pair to the second BWP pair of the UE, and the downlink BWP of the first BWP pair is used by multiple UEs in the cell where the UE is located to receive paging messages from the base station.
  • the UE includes the UE, and the RRC state of the UE is the RRC_IDLE state or the RRC_INACTIVE state when it is on the first BWP pair; the UE accesses the base station on the second BWP pair.
  • the UE in the RRC_IDLE state or the RRC_INACTIVE state camps on the first BWP pair, and monitors the paging message on the first BWP pair.
  • the UE switches from the first BWP pair to the second BWP pair. Two BWP pairs are connected to the base station.
  • the UE may perform RRC establishment with the base station on the second BWP pair, so that the state of the UE is changed from the RRC_IDLE state or the RRC_INACTIVE state to the RRC_CONNECTED state. Subsequently, the base station and the UE may perform UE-specific data channel and/or control channel transmission on the second BWP pair.
  • the UE When the UE camps on the first BWP pair and the RRC state of the UE is RRC_IDLE or RRC_INACTIVE state, through the method shown in Design 1, for multiple UEs in the cell, the multiple UEs camp on the same common first BWP Yes, but the base station is connected to the specific second BWP pair of each UE, so that the multiple UEs can be dispersed on multiple second BWP pairs to access the base station, reducing collisions between multiple UEs, reducing congestion, and improving The access success rate of the UE.
  • the four-step access method or the two-step access method may be adopted.
  • FIG. 4A shows an example flow chart of the four-step access method.
  • the UE sends an access preamble (preamble) to the base station through the physical random access channel (PRACH), that is, message 1 to the base station; after receiving the access preamble, the base station sends the UE to the UE Send a random access response (RAR), that is, the base station sends message 2 to the UE.
  • PRACH physical random access channel
  • RAR random access response
  • the RAR can indicate the resource location of the PUSCH; the UE sends message 3 to the base station through the PUSCH according to the resource location of the PUSCH indicated by the message 2; received After message 3, the base station can send message 4 to the UE.
  • the message 3 may include an RRC setup request (RRCSetupResuest) message or an RRC resume request (RRCResumeResuest) message.
  • message 4 may include one or more of the following information: RRC setup (RRCSetup) message, RRC resume (RRCResume) message, PUSCH acknowledgement/negative acknowledgement in message 3. NACK), and power control commands, etc.
  • FIG. 4B shows an example flow chart of the two-step access method.
  • the UE sends an access preamble to the base station through PRACH, and sends uplink data to the base station through PUSCH, that is, the UE sends message A to the base station; after receiving message A, the base station sends message B to the UE .
  • the message A may include an RRC setup request (RRCSetupResuest) message or an RRC resume request (RRCResumeResuest) message.
  • message B may include one or more of the following information: RRC setup (RRCSetup) message, RRC resume (RRCResume) message, PUSCH ACK/NACK in message A, and power control commands.
  • the RRC state of the UE is the RRC_IDLE state or the RRC_INACTIVE state
  • the UE switches from the first BWP pair to the second BWP pair, and accesses the base station in the second BWP pair.
  • the UE and the base station After accessing the base station or during the access process, the UE and the base station perform an RRC establishment process, so that the RRC state of the UE is switched from the RRC_IDLE state or the RRC_INACTIVE state to the RRC_CONNECTED state.
  • the RRC state of the UE is in the RRC_INACTIVE state, and the UE switches from the first BWP pair to the second BWP pair, and accesses the base station in the second BWP pair.
  • the UE and the base station After accessing the base station or during the access process, the UE and the base station perform an RRC recovery process, so that the RRC state of the UE is switched from the RRC_INACTIVE state to the RRC_CONNECTED state.
  • the base station and the UE can perform UE-specific data channel and/or control channel transmission on the second BWP pair .
  • the base station when the base station and the UE perform UE-specific data channel and/or control channel transmission on the second BWP pair, the base station may send the UE-specific physical downlink on the downlink BWP in the second BWP pair to the UE.
  • the control channel physical downlink control channel, PDCCH
  • PDCCH physical downlink control channel
  • PDSCH physical downlink control channel
  • the UE may send the UE-specific PUSCH to the base station on the uplink BWP in the second BWP pair.
  • the base station may further configure a new active BWP pair for the UE, for example, the third BWP pair;
  • the UE switches from the second BWP pair to the third BWP pair, and performs UE-specific data channel and/or control channel transmission with the base station on the third BWP pair.
  • the base station can update the active BWP pair of the UE according to the service type, channel condition, or system load of the UE, so that the signal quality on the active BWP pair used for communication between the base station and the UE is higher or more resources are available. So that the information transmission success rate is higher or the transmission rate is higher.
  • the base station when the base station configures a new active BWP pair for the UE, for example, on the downlink BWP on the second BWP pair, the base station sends the PDCCH for the UE, and the PDCCH indicates that the UE’s new active BWP pair is The third BWP pair in the UE's candidate BWP pair set.
  • the UE switches from the second BWP pair to the third BWP pair, and performs UE-specific data channel and/or control channel transmission with the base station on the third BWP pair.
  • the method for the UE to transmit UE-specific data channels and/or control channels with the base station on the third BWP pair is similar to the above-mentioned method for the UE to transmit UE-specific data channels and/or control channels with the base station on the second BWP pair.
  • the above-mentioned second BWP pair is replaced with the third BWP pair, which will not be repeated here.
  • the candidate BWP pair set of the UE includes one or more BWP pairs, and the candidate BWP pair set may be configured for the UE through a broadcast channel, a system message, an RRC message, or a MAC control element (CE).
  • Design 2 When camping on the first BWP pair, the RRC state of the UE is RRC_INACTIVE state, and the UE is in the RRC_INACTIVE state.
  • the second BWP transmits UE-specific information to the upper and the base station.
  • the method can be described as: a UE switches from a first BWP pair to a second BWP pair, and the downlink BWP of the first BWP pair is used for multiple UEs in the cell where the UE is located to receive paging messages from the base station, where the multiple The UE includes the UE.
  • the RRC state of the UE is the RRC_INACTIVE state
  • the UE transmits the UE-specific information with the base station on the second BWP pair.
  • the RRC state of the UE is the RRC_INACTIVE state.
  • the RRC_INACTIVE state For example, when the second BWP pair transmits the specific information of the UE to the base station, the RRC state of the UE is the RRC_INACTIVE state.
  • the UE in the RRC_INACTIVE state can use the second BWP pair to perform unicast data transmission or to transmit UE-specific information.
  • the RRC state of the UE is the RRC_INACTIVE state, and the UE switches from the first BWP pair to the second BWP pair, and transmits the UE-specific data channel and/or control channel with the base station on the second BWP pair.
  • the UE switches from the second BWP pair to the first BWP pair, and continues to camp on the first BWP pair.
  • the RRC state of the UE is the RRC_INACTIVE state.
  • the UE in the RRC_INACTIVE state camps on the first BWP pair and monitors the paging message on the first BWP pair.
  • the UE switches from the first BWP pair to the second BWP pair, and the UE The state of is still maintained as the RRC_INACTIVE state, and the UE specific information is transmitted to the base station on the second BWP pair.
  • the UE can switch from the second BWP pair back to the first BWP pair, and reside on the first BWP pair in the RRC_INACTIVE state again to monitor paging messages, synchronization signals, broadcast messages, and/or system messages.
  • the UE When the UE camps on the first BWP pair and the RRC state of the UE is the RRC_INACTIVE state, through the method shown in Design 2, for multiple UEs in a cell, the multiple UEs camp on the same common first BWP pair, However, the UE-specific information is transmitted to the base station on each UE-specific second BWP pair, so that the information of the multiple UEs can be scattered on multiple second BWP pairs, reducing data congestion and avoiding the transmission delay of UE information If it is too long, the interference between the multiple UEs can be avoided at the same time, and the demodulation success rate of the UE information can be improved.
  • 5A to 5E are diagrams showing examples of the flow of UE-specific information transmission by the UE in the RRC_INACTIVE state using the second BWP pair.
  • Figure 5A shows the uplink data transmission.
  • the state of the UE is in the RRC_CONNECTED state, and the base station sends an RRC release message to the UE, so that the state of the UE is changed to the RRC_INACTIVE state.
  • the fourth BWP pair can be the same as the first BWP pair, the second BWP pair, or the third BWP pair, or it can be different. This is not done in the embodiment of this application. limit.
  • the RRC release message may also be used to indicate the configuration of the second BWP pair.
  • Operation A502 the UE camps on the first BWP pair.
  • the UE After the state of the UE transitions from the RRC_CONNECTED state to the RRC_INACTIVE state, the UE camps on the first BWP pair.
  • the UE sends UE-specific data to the base station on the uplink BWP of the second BWP pair.
  • the UE When triggered by the higher layers of the UE, the UE switches from the first BWP pair to the second BWP pair.
  • the UE when the UE sends UE-specific data to the base station, it can be sent through the uplink physical layer data channel, for example, through the PUSCH.
  • the transmission parameters of the PUSCH may be predefined, or configured by the base station for the UE, or some types of transmission parameters may be predefined, and some types of transmission parameters may be configured by the base station for the UE.
  • the PUSCH satisfies one or more of the following conditions: the transmission parameters of the PUSCH are specific to the UE or the UE group where the UE is located, the CRC of the PUSCH is scrambled by the identifier of the UE, and the PUSCH carries The information is specific to the UE or specific to the UE group in which the UE is located.
  • the base station when the base station configures PUSCH transmission parameters for the UE, it can be configured for the UE through one of the following information: Operation A501 RRC release message, the first BWP pair or the second BWP pair sent to the UE PBCH, system message, or PDCCH/PDSCH previously received from the base station (for example, the PDCCH/PDSCH received the previous time, the PDCCH/PDSCH received during the previous data transmission or the last service transmission).
  • the UE-specific data/information sent by the UE to the base station or received from the base station may include one or more of the following service data/information: voice, video, and electronic mail (email). ), chat messages, electronic payments, and/or browsed web pages, etc.
  • the UE receives the PUSCH acknowledgement (acknowledgement, ACK)/negative acknowledgement (NACK) feedback sent in operation A503.
  • acknowledgement acknowledgement
  • NACK negative acknowledgement
  • the UE may perform operation A503 and operation A504 at least once (for example, once, twice or more, etc.). For example, in one service transmission, if the UE needs to send a lot of uplink data and cannot be completed by one PUSCH transmission, the UE may perform operations A503 and A504 multiple times. For another example, the UE may perform multiple service transmissions through multiple PUSCH transmissions on the second BWP pair.
  • the UE In operation A505, the UE camps on the first BWP pair again.
  • the UE after the UE transmits one or more services to the base station, it cuts from the second BWP to the first BWP pair, and then camps on the first BWP pair again.
  • the first timer is started, and the first timer is restarted when the UE has a new service to be sent to the base station or when it sends a PUSCH to the base station.
  • the UE switches from the second BWP to the first BWP pair, and camps on the first BWP pair again.
  • Figure 5B shows the uplink data transmission.
  • Operation B501-B502 is the same as operation A501-A502.
  • the UE sends the preamble and UE-specific data to the base station on the uplink BWP of the second BWP pair.
  • the UE will also send an access preamble to the base station, and the access preamble may also be referred to as a preamble.
  • the UE sends a preamble to the base station through a physical random access channel (PRACH) channel, and the base station can use the preamble to estimate the timing advance (TA) and/or channel of the UE for demodulation PUSCH sent by the UE.
  • PRACH physical random access channel
  • Operation B504-B505 is the same as operation A504-A505. Similar to FIG. 5A, operation B504 is optional.
  • Figure 5C shows the uplink data transmission.
  • Operation C501-C502 is the same as operation A501-A502.
  • the UE sends a preamble to the base station on the uplink BWP of the second BWP pair.
  • the UE When triggered by the higher layers of the UE, the UE switches from the first BWP pair to the second BWP pair.
  • the UE sends a preamble to the base station through the PRACH channel, and the base station can use the preamble to estimate the timing advance (TA) of the UE.
  • TA timing advance
  • the UE receives a random access response (RAR) from the base station on the downlink BWP of the second BWP pair.
  • RAR can be used to indicate the UE's TA and/or the transmission parameters of the UE's PUSCH.
  • Operation C505 includes operation A503.
  • the transmission parameters of the PUSCH may be indicated by the base station for the UE through RAR in operation C504.
  • Operation C506-C507 is the same as operation A504-A505. Similar to Figure 5A, operation C506 is optional.
  • Figure 5D shows the downlink data transmission.
  • Operation D501-D502 is the same as operation A501-A502.
  • the UE receives specific data of the UE from the base station on the downlink BWP of the second BWP pair.
  • the UE After receiving the paging message sent by the base station on the first BWP pair, the UE switches from the first BWP pair to the second BWP pair, and receives downlink data sent by the base station on the second BWP pair.
  • the base station When the base station sends UE-specific data to the UE, it can be sent through the downlink physical layer data channel, for example, through the PDSCH.
  • the transmission parameters of the PDSCH may be predefined, or configured by the base station for the UE, or some types of transmission parameters may be predefined, and some types of transmission parameters may be configured by the base station for the UE.
  • the PDSCH satisfies one or more of the following conditions: the transmission parameters of the PDSCH are specific to the UE or specific to the UE group where the UE is located, the CRC of the PDSCH is scrambled by the identifier of the UE, and the PDSCH carries The information is specific to the UE or specific to the UE group in which the UE is located.
  • the base station configures the PDSCH transmission parameters for the UE, it can be configured for the UE through one of the following information: the RRC release message in the operation D501, the PBCH sent to the UE on the first BWP pair or the second BWP pair, or the system Message, or a paging message sent by the base station is received on the first BWP pair.
  • the UE sends the ACK/NACK of the PDSCH to the base station on the uplink BWP of the second BWP pair.
  • the UE may perform operation D503 and operation D504 at least once (for example, once, twice or more times, etc.) on the second BWP pair.
  • the UE In operation D505, the UE camps on the first BWP pair again.
  • the UE after the UE receives the first PDSCH from the base station or sends the first ACK/NACK to the base station, it starts the second timer.
  • the UE receives the second PDSCH from the base station or sends the second ACK/NACK to the base station, it restarts Timer. After the timer expires, the UE switches from the second BWP to the first BWP pair, and camps on the first BWP pair again.
  • Figure 5E shows the downlink data transmission.
  • Operation E501-E502 is the same as operation A501-A502.
  • the UE sends a preamble to the base station on the uplink BWP of the second BWP pair.
  • the UE After receiving the paging message sent by the base station on the first BWP pair, the UE switches from the first BWP pair to the second BWP pair.
  • the UE sends a preamble to the base station through the PRACH channel, and the base station can use the preamble to know that the UE is still located in the coverage area of the base station, and therefore can send downlink data to the UE to avoid the waste of downlink resources.
  • the identity of the UE can be identified by one or more of the sequence value of the preamble, time domain resources, frequency domain resources, and code resources, so that the base station knows which UE sent the preamble.
  • Operation E504-E506 is the same as operation D503-D505.
  • Figs. 5A to 5E can be combined.
  • Figure 5F- Figure 5L are obtained.
  • the UE can obtain the information of the second BWP pair by configuring the second BWP pair method 1, the second BWP pair method 2, or the second BWP pair method 3 as follows:
  • the second BWP pair is predefined.
  • the resource location of the second BWP pair is fixed or predefined, for example, the relative resource location of the second BWP pair and the first BWP pair is fixed or predefined.
  • the second BWP pair is configured by the base station for the UE through signaling.
  • the UE receives the configuration of the second BWP pair from the network device.
  • the base station When the base station configures the second BWP pair for the UE, it may configure the second BWP pair information for the UE; or it may configure the candidate second BWP pair set information for the UE, and indicate the UE’s second BWP pair set from the candidate second BWP pair set.
  • the index of the second BWP pair; or the information of the candidate second BWP pair set may be configured for the UE.
  • the UE may select the UE’s second BWP pair from the candidate second BWP pair set.
  • the UE may send a signal to The base station indicates the selected second BWP pair.
  • the candidate second BWP pair set includes one or more candidate second BWP pairs, and each candidate second BWP pair corresponds to an index;
  • the information for configuring the candidate second BWP pair set for the UE can also be described as: configuring for the UE Information about each candidate second BWP pair in the candidate second BWP pair set; the second BWP pair indicated from the candidate second BWP pair set or the selected second BWP pair can also be referred to as: the second activation of the UE BWP pair, or the UE’s working second BWP pair; the second BWP pair indicated from the candidate second BWP pair set or the selected second BWP pair can be a second BWP pair or multiple second BWP pairs.
  • Two BWP pairs, the embodiment of this application does not impose restrictions.
  • the base station can configure the second BWP pair according to the channel condition or service type of the UE, so that the channel quality of the second BWP pair is better when the UE information is transmitted, and the transmission success rate is high.
  • the base station when the base station configures the second BWP pair for the UE, it sends an RRC release message, PBCH, system message, or paging message to the UE.
  • the RRC release message, PBCH, system message, or paging message includes the first configured for the UE.
  • the base station can update the configuration of the second BWP pair according to the change of the channel condition of the UE, the change of the service type or the change of the system load, thereby increasing the success rate of UE information transmission or reducing the transmission delay of UE information.
  • the base station can release the RRC connection with the UE through the RRC release message, and cause the UE to switch to the RRC_IDLE state or the RRC_INACTIVE state.
  • the base station may configure the second BWP pair for the UE.
  • the PBCH, system message, or paging message can be received by the UE on the first BWP pair, or it can be received by the UE before camping on the first BWP pair.
  • the UE in the above figure The fourth BWP pair introduced in 5A-5E is received on the upper side, and the embodiment of the present application does not limit it.
  • the base station indicates the index of the second BWP pair of the UE from the set of candidate second BWP pairs through the RRC release message.
  • the information of the candidate second BWP pair set is configured by the base station for the UE through PBCH, system message, or paging message, or is predefined.
  • the base station indicates the index of the second BWP pair of the UE from the set of candidate second BWP pairs through a paging message.
  • the information of the candidate second BWP pair set is configured by the base station for the UE through an RRC release message, a PBCH or a system message, or is predefined.
  • the base station indicates the index of the second BWP pair of the UE from the set of candidate second BWP pairs through the PBCH.
  • the information of the candidate second BWP pair set is configured by the base station for the UE through an RRC release message, a paging message, or a system message, or is predefined.
  • the base station indicates the index of the second BWP pair of the UE from the set of candidate second BWP pairs through a system message.
  • the information of the candidate second BWP pair set is configured by the base station for the UE through an RRC release message, a paging message, or a PBCH, or is predefined.
  • the base station configures the information of the candidate second BWP pair set for the UE through the RRC release message, PBCH, system message, or paging message, or predefines the information of the candidate second BWP pair set, and the UE sets the candidate second BWP pair set Select the second BWP pair of the UE in.
  • one or more of the following parameters of the uplink BWP of the (candidate) second BWP pair may be configured: BWP identifier (ID), time domain resource location, frequency domain resource location, subcarrier spacing, cyclic prefix (CP) type, physical uplink control channel (PUCCH) transmitted on the BWP Configuration information, PUSCH configuration information transmitted on the BWP, and physical random access channel (PRACH) configuration information transmitted on the BWP.
  • ID BWP identifier
  • time domain resource location time domain resource location
  • frequency domain resource location frequency domain resource location
  • subcarrier spacing cyclic prefix (CP) type
  • CP cyclic prefix
  • PUCCH physical uplink control channel
  • PUSCH configuration information transmitted on the BWP PUSCH configuration information transmitted on the BWP
  • PRACH physical random access channel
  • one or more of the following parameters of the downlink BWP of the (candidate) second BWP pair may be configured: BWP ID, time domain resource location, frequency domain resource location, subcarrier spacing, CP type, configuration information of the PDCCH transmitted on the BWP, and configuration information of the PDSCH transmitted on the BWP.
  • the signaling format of the configuration of the second BWP pair carried in the RRC release message is as follows.
  • the information elements of the RRC release message are RRCRelease-IEs.
  • the signaling format of the index of the second BWP pair carried in the RRC release message is as follows.
  • the information element of the RRC release message is RRCRelease-IEs
  • the information field of the index of the second BWP pair is
  • resumeBWPpairIndex the information of the candidate second BWP pair is configured in the system message SIB1-NB-IEs.
  • BWPpairConfig is as follows.
  • the PDCCH configuration it may be indicated in the configuration that the SSB, synchronization signal, or PBCH transmitted on the PDCCH and the first BWP pair are quasi-co-location (QCL), that is, the PDCCH and the first BWP pair are quasi-co-location (QCL).
  • the SSB, synchronization signal, or PBCH transmitted on the BWP pair share the same channel conditions.
  • the UE can obtain the channel estimation of the SSB, and the channel estimation can be used to demodulate the PDCCH.
  • the SSB, synchronization signal, or PBCH transmitted on the PDSCH and the first BWP pair can be indicated in the configuration to be QCL, that is, the SSB, synchronization signal, and synchronization signal transmitted on the PDSCH and the first BWP pair are QCL.
  • PBCH shares the same channel conditions.
  • the UE can obtain the channel estimation of the SSB, and the channel estimation can be used to demodulate the PDSCH.
  • the UE uses the SSB etc. to obtain the channel estimation, and uses the channel estimation result to demodulate the PDCCH and/or PDSCH, so that the UE does not need to perform additional channel estimation for the PDCCH or the PDSCH, which reduces the complexity of the UE’s implementation and saves the UE’s power. Consumption.
  • the second BWP pair is determined according to the identifier (ID) of the UE.
  • the ID of the UE may be a radio network temporary identifier (RNTI) of the UE or an international mobile equipment identity (IMEI) of the UE.
  • RNTI radio network temporary identifier
  • IMEI international mobile equipment identity
  • the UE’s RNTI can be the UE’s cell radio network temporary identifier (C-RNTI), or semi-persistent scheduling-radio network temporary identifier (semi-persistent scheduling RNTI, SPS-RNTI, etc.).
  • C-RNTI cell radio network temporary identifier
  • SPS-RNTI semi-persistent scheduling RNTI
  • This application is implemented The example is not limited. With this method, there is no need to configure the second BWP pair through additional signaling, which can save signaling overhead between the base station and the UE.
  • the index of the second BWP pair of the UE in the candidate second BWP pair set of the UE is: (x*K) mod N.
  • x represents the UE ID
  • K is an integer
  • K is predefined or configured by the base station through signaling
  • N represents the number of candidate second BWP pairs in the set of candidate second BWP pairs for the UE
  • mod represents the number of candidate second BWP pairs in the set of candidate second BWP pairs for the UE.
  • Modular operation For the introduction of the candidate second BWP pair set of the UE, please refer to the above method 2 of configuring the second BWP pair, which will not be repeated here.
  • the index of the second BWP pair of the UE in the candidate second BWP pair set of the UE is: x0+(xmod M)*N.
  • x represents the UE ID
  • x0, N, and M are integers
  • x0, N, and/or M are predefined or configured by the base station for the UE through signaling.
  • x0, N, and M are all predefined; or x0, N, and M are all configured by the base station for the UE through signaling; or x0 and N are predefined, and M is configured by the base station for the UE through signaling.
  • the embodiments of this application do not make limitations.
  • N represents the number of candidate second BWP pairs in the UE's candidate second BWP pair set.
  • the candidate second BWP pair set of the UE please refer to the above method 2 of configuring the second BWP pair, which will not be repeated here.
  • the index of a specific RB (for example, the start RB, the middle RB, or the last RB, etc.) in the second BWP pair of the UE is: x0+(xmod U)*P.
  • x represents the UE ID; x0, P, and U are integers, and x0, P, and/or U are predefined or configured by the base station for the UE through signaling.
  • x0, P, and U are all predefined; or x0, P, and U are all configured by the base station for the UE through signaling; or x0 and P are predefined, and U is configured by the base station for the UE through signaling.
  • the embodiments of this application do not make limitations.
  • P represents the number of RBs included in the maximum bandwidth supported by the UE, where the maximum bandwidth supported by the UE can also be described as the bandwidth capability of the UE.
  • the above formula can obtain the index of the specific RB in the downlink BWP, and P represents the number of RBs included in the maximum downlink bandwidth supported by the UE;
  • the uplink BWP in the second BWP pair the above formula
  • the index of a specific RB in the uplink BWP can be obtained, and P represents the number of RBs included in the maximum uplink bandwidth supported by the UE.
  • the maximum uplink bandwidth supported by the UE and the maximum downlink bandwidth supported by the UE may be the same or different, which is not limited in the embodiment of the present application.
  • the base station and/or terminal device may include a hardware structure and/or software module, and the above functions are implemented in the form of a hardware structure, a software module, or a hardware structure plus a software module. Whether a certain function among the above-mentioned functions is executed by a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraint conditions of the technical solution.
  • FIG. 6 is a schematic structural diagram of an apparatus 600 provided by an embodiment of the present application.
  • the device 600 can be a terminal device, which can implement the terminal device-side method provided in the embodiments of this application; the device 600 can also be a device that can support the terminal device to implement the method, and the device 600 can be installed in the terminal device. In or matched with terminal equipment.
  • the device 600 may be a base station, which can implement the base station-side method provided in the embodiments of the present application; the device 600 may also be a device capable of supporting the base station to implement the method, and the device 600 may be installed in the base station or in combination with Base station matching use.
  • the apparatus 600 may be a hardware structure, a software module, or a hardware structure plus a software module.
  • the device 600 may be implemented by a chip system.
  • the device 600 includes a processing module 602 and a communication module 604.
  • the processing module 602 can generate a signal to be transmitted, and can use the communication module 604 to transmit the signal.
  • the processing module 602 may use the communication module 604 to receive signals and process the received signals.
  • the processing module 602 and the communication module 604 are coupled.
  • the coupling in the embodiments of the present application is an indirect coupling or connection between devices, units or modules, which can be electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • the coupling can be a wired connection or a wireless connection.
  • the communication module may be a circuit, a module, a bus, an interface, a transceiver, a pin, or other device that can implement a transceiver function, and the embodiment of the present application does not limit it.
  • FIG. 7 is a schematic structural diagram of an apparatus 700 provided by an embodiment of the present application.
  • the device 700 may be a terminal device, which can implement the terminal device-side method provided in the embodiments of the present application; the device 700 may also be a device that can support the terminal device to implement the method, such as a chip system.
  • the device 700 can Installed in terminal equipment or matched with terminal equipment.
  • the device 700 may be a base station, which can implement the base station-side method provided in the embodiments of this application; the device 700 may also be a device that can support the base station to implement the method, such as a chip system.
  • the device 700 can be installed in In the base station or matched with the base station.
  • the device 700 includes a processing system 702 for implementing the method provided in the embodiment of the present application.
  • the processing system 702 may be a circuit, and the circuit may be implemented by a chip system.
  • the processing system 702 includes one or more processors 722, which may be used to implement the methods provided in the embodiments of the present application.
  • the processor 722 may also be used to manage other devices included in the processing system 702.
  • the other devices may be the following memory 724, bus 726, and One or more of the bus interfaces 728.
  • the processor 722 may be used to manage the memory 724, or the processor 722 may be used to manage the memory 724, the bus 726, and the bus interface 728.
  • the processing system 702 may also include one or more memories 724 for storing instructions and/or data.
  • the memory 724 may be included in the processor 722. If the processing system 702 includes the memory 724, the processor 722 may be coupled with the memory 724. The processor 722 may cooperate with the memory 724 to operate. The processor 722 can execute instructions stored in the memory 724. When the processor 722 executes the instructions stored in the memory 724, the method provided in the embodiment of the present application can be implemented. The processor 722 may also read data stored in the memory 724. The memory 724 may also store data obtained when the processor 722 executes instructions.
  • the processor may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic devices, discrete gates or transistor logic devices, or discrete hardware components.
  • the general-purpose processor may be a microprocessor or other conventional processors. The steps of the method disclosed in the embodiments of the present application may be executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.
  • the memory includes a volatile memory (volatile memory), such as random-access memory (RAM); the memory may also include a non-volatile memory (non-volatile memory), such as fast Flash memory (flash memory), hard disk drive (HDD) or solid-state drive (SSD); memory may also include a combination of the above types of memory; memory may also include any other device with storage function, For example, circuits, devices, or software modules.
  • volatile memory such as random-access memory (RAM)
  • non-volatile memory such as fast Flash memory (flash memory), hard disk drive (HDD) or solid-state drive (SSD); memory may also include a combination of the above types of memory; memory may also include any other device with storage function, For example, circuits, devices, or software modules.
  • the processing system 702 may also include a bus interface 728 for providing an interface between the bus 726 and other devices.
  • the bus interface can also be referred to as a communication interface.
  • the communication interface may be a circuit, a module, a bus, an interface, a transceiver, a pin, or other device that can implement a transceiver function, and the embodiment of the present application does not limit it.
  • the device 700 includes a transceiver 706 for communicating with other communication devices through a transmission medium, so that other devices used in the device 700 can communicate with other communication devices.
  • the other device may be the processing system 702.
  • other devices in the device 700 may use the transceiver 706 to communicate with other communication devices, and receive and/or send corresponding information. It can also be described as that other devices in the device 700 can receive the first information, where the first information is received by the transceiver 706 through a transmission medium, and the first information can be transmitted through the bus interface 728 or through the bus interface 728 and the bus 726.
  • the transceiver 706 interacts with other devices in the device 700; and/or, other devices in the device 700 may send second information, where the second information is sent by the transceiver 706 through a transmission medium, and the second information
  • the interaction between the transceiver 706 and other devices in the device 700 may be through the bus interface 728 or through the bus interface 728 and the bus 726.
  • the device 700 may also include a user interface 704.
  • the user interface 704 is an interface between the user and the device 700, and may be used for information interaction between the user and the device 700.
  • the user interface 704 may be at least one of a keyboard, a mouse, a display, a speaker, a microphone, and a joystick.
  • the processing system 702 includes a processor 722, and may also include one or more of a memory 724, a bus 726, and a bus interface 728, which are used to implement the methods provided in the embodiments of the present application.
  • the processing system 702 is also in the protection scope of this application.
  • the module division of the device is a logical function division, and there may be other division methods in actual implementation.
  • each functional module of the device may be integrated into one module, or each functional module may exist alone, or two or more functional modules may be integrated into one module.
  • the technical solutions provided in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software When implemented by software, it can be implemented in the form of a computer program product in whole or in part.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, network equipment, terminal equipment, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, or a tape), an optical medium (for example, a digital video disc (DVD)), or a semiconductor medium.
  • the embodiments can be mutually cited.
  • methods and/or terms between method embodiments can be mutually cited, such as functions and/or functions between device embodiments.
  • Or terms may refer to each other, for example, functions and/or terms between the device embodiment and the method embodiment may refer to each other.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

Des modes de réalisation de la présente invention concernent un procédé pour réaliser une communication sur une partie de bande passante (paire), et permettant de réduire une congestion de données pour améliorer le taux de réussite de transmission de données. Le procédé comprend les étapes suivantes : un dispositif terminal commute d'une première partie de bande passante (paire) à une seconde partie de bande passante (paire) du dispositif terminal, de multiples dispositifs terminaux dans une cellule dans laquelle le dispositif terminal est situé utilisant la première partie de bande passante (paire) pour recevoir un message de radiomessagerie en provenance d'un dispositif de réseau, et le dispositif terminal, lorsqu'il est sur la première partie de bande passante (paire), étant dans un état de veille de commande de ressource radio ou un état inactif de commande de ressource radio ; et le dispositif terminal, lorsqu'il est sur la seconde partie de bande passante (paire), accède au dispositif de réseau, ou transmet au dispositif de réseau des données spécifiques au dispositif terminal.
PCT/CN2019/122271 2019-11-30 2019-11-30 Procédé pour réaliser une communication sur une partie de bande passante WO2021103026A1 (fr)

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