WO2021146871A1 - 通信方法及装置 - Google Patents

通信方法及装置 Download PDF

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Publication number
WO2021146871A1
WO2021146871A1 PCT/CN2020/073335 CN2020073335W WO2021146871A1 WO 2021146871 A1 WO2021146871 A1 WO 2021146871A1 CN 2020073335 W CN2020073335 W CN 2020073335W WO 2021146871 A1 WO2021146871 A1 WO 2021146871A1
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WO
WIPO (PCT)
Prior art keywords
frequency
bandwidth
terminal device
initial uplink
uplink bwp
Prior art date
Application number
PCT/CN2020/073335
Other languages
English (en)
French (fr)
Inventor
徐伟杰
Original Assignee
Oppo广东移动通信有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to EP20915137.2A priority Critical patent/EP4093139A4/en
Priority to CN202080093733.8A priority patent/CN115004843A/zh
Priority to PCT/CN2020/073335 priority patent/WO2021146871A1/zh
Publication of WO2021146871A1 publication Critical patent/WO2021146871A1/zh
Priority to US17/865,596 priority patent/US20220353923A1/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA
    • H04W74/0833Random access procedures, e.g. with 4-step access
    • H04W74/0841Random access procedures, e.g. with 4-step access with collision treatment
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453Resources in frequency domain, e.g. a carrier in FDMA
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA
    • H04W74/0866Non-scheduled access, e.g. ALOHA using a dedicated channel for access
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/002Transmission of channel access control information
    • H04W74/004Transmission of channel access control information in the uplink, i.e. towards network
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA
    • H04W74/0833Random access procedures, e.g. with 4-step access
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • This application relates to communication technology, and in particular to a communication method and device.
  • the network device in order to reduce the power consumption of the terminal, the network device will configure the bandwidth part (BWP) for the terminal device, and the terminal can communicate with the network device through the BWP.
  • BWP bandwidth part
  • the terminal device usually receives the system broadcast message sent by the network device, and determines the initial uplink BWP according to the system broadcast message, so that the uplink transmission of the random access process can be performed in the initial uplink BWP.
  • the resource of the physical random access channel The random access channel opportunity (RACH occasion, RO) is configured in the initial uplink BWP.
  • the bandwidth corresponding to the multiple ROs may be greater than the bandwidth of the terminal, and the bandwidth of the initial uplink BWP will be greater than the bandwidth of the terminal, which will cause the terminal to be unable to work normally in the NR system.
  • Uplink data transmission in the middle may be greater than the bandwidth of the terminal, and the bandwidth of the initial uplink BWP will be greater than the bandwidth of the terminal, which will cause the terminal to be unable to work normally in the NR system.
  • the embodiments of the present application provide a communication method and device to avoid that the bandwidth of the initial uplink BWP is greater than the bandwidth of the terminal, which causes the terminal to be unable to normally transmit uplink data in the NR system.
  • an embodiment of the present application provides a communication method, including:
  • an embodiment of the present application provides a communication method, including:
  • an embodiment of the present application provides a communication device, including:
  • the determining module is configured to determine the initial uplink bandwidth part BWP according to the first bandwidth information corresponding to the first random access channel opportunity RO.
  • an embodiment of the present application provides a communication device, including:
  • the transceiver module is used to receive the physical random access channel PRACH from the terminal equipment;
  • the determining module is configured to determine the initial uplink bandwidth part BWP corresponding to the terminal device according to the first random access channel timing RO corresponding to the PRACH, wherein the initial uplink BWP is based on the first RO corresponding to the first RO The bandwidth information is determined.
  • an embodiment of the present application provides a terminal device, including: a transceiver, a processor, and a memory;
  • the memory stores computer execution instructions
  • the processor executes the computer-executable instructions stored in the memory, so that the processor executes the communication method according to any one of claims 1 to 19.
  • an embodiment of the present application provides a network device, including: a transceiver, a processor, and a memory;
  • the memory stores computer execution instructions
  • the processor executes the computer-executable instructions stored in the memory, so that the processor executes the communication method according to any one of claims 20 to 38.
  • an embodiment of the present application provides a computer-readable storage medium, and the computer-readable storage medium stores computer-executable instructions.
  • the computer-executable instructions are executed by a processor, they are used to implement 19.
  • embodiments of the present application provide a computer-readable storage medium that stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, they are used to implement 38 The communication method described in any one.
  • the embodiments of the present application provide a communication method and device, the method including: determining an initial uplink bandwidth part BWP according to first bandwidth information corresponding to a first random access channel opportunity RO.
  • FIG. 1 is a schematic diagram of a communication scenario provided by an embodiment of the application
  • FIG. 2 is a schematic diagram of BWP provided by an embodiment of the application.
  • FIG. 3 is a schematic diagram of the configuration of an initial uplink BWP in the prior art provided by an embodiment of the application;
  • FIG. 4 is a schematic diagram of an association relationship between RO resources and associated objects in an embodiment of the application.
  • FIG. 5 is a schematic diagram of the 4-step RACH process provided by an embodiment of the application.
  • Fig. 6 is a schematic diagram of a 2-step RACH process provided by an embodiment of the application.
  • FIG. 7 is a first flowchart of a communication method provided by an embodiment of this application.
  • FIG. 8 is a schematic diagram 1 of the initial uplink BWP configuration provided by an embodiment of this application.
  • FIG. 9 is a second schematic diagram of the configuration of the initial uplink BWP provided by an embodiment of the application.
  • FIG. 10 is the third schematic diagram of the configuration of the initial uplink BWP provided by the embodiment of this application.
  • FIG. 11 is a fourth schematic diagram of the configuration of an initial uplink BWP provided by an embodiment of this application.
  • FIG. 12 is a second flowchart of a communication method provided by an embodiment of this application.
  • FIG. 13 is a first structural diagram of a communication device provided by an embodiment of this application.
  • FIG. 14 is a second structural diagram of a communication device provided by an embodiment of this application.
  • FIG. 15 is a schematic structural diagram of a terminal device provided by an embodiment of the application.
  • FIG. 16 is a schematic structural diagram of a network device provided by an embodiment of this application.
  • 3GPP 3rd Generation Partnership, the third generation partnership project.
  • Terminal equipment It can be a device that includes wireless transceiver functions and can cooperate with network equipment to provide users with communication services.
  • terminal equipment may refer to User Equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, terminal, wireless communication equipment, User agent or user device.
  • UE User Equipment
  • the terminal device may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA), and a wireless Communication function handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in future 5G networks or networks after 5G, etc.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • Network equipment can be equipment used to communicate with terminal equipment, for example, it can be in the Global System for Mobile Communication (GSM) or Code Division Multiple Access (CDMA) communication system
  • the base station can also be the base station (NodeB, NB) in the Wideband Code Division Multiple Access (WCDMA) system, or the evolved base station (Evolutional Node) in the LTE system B, eNB or eNodeB), or the network equipment may be a relay station, access point, in-vehicle equipment, wearable equipment, and network side equipment in the future 5G network or networks after 5G, or the future evolution of the public land mobile network (Public Land Mobile Network).
  • Mobile Network, PLMN Mobile Network, etc. in the network.
  • the network equipment involved in the embodiments of the present application may also be referred to as a radio access network (Radio Access Network, RAN) equipment.
  • the RAN equipment is connected to the terminal equipment and is used to receive data from the terminal equipment and send it to the core network equipment.
  • RAN equipment corresponds to different equipment in different communication systems. For example, it corresponds to base station and base station controller in 2G system, corresponds to base station and radio network controller (RNC) in 3G system, and corresponds to evolution in 4G system.
  • Evolutional Node B (eNB) corresponds to the 5G system in the 5G system, such as the access network equipment in the NR (for example, gNB, centralized unit CU, distributed unit DU).
  • Random access process refers to the process before the terminal device transmits the random access preamble to the establishment of a basic signaling connection with the network device. It refers to the terminal device and the network device to establish a wireless link, obtain or restore The process of uplink synchronization. Random access is a key step in a mobile communication system, making it possible for terminal equipment and network equipment to establish a communication connection. Terminal equipment exchanges information with network equipment through random access, and can also achieve uplink synchronization through random access.
  • Beam refers to the shape of the electromagnetic wave emitted by the satellite antenna on the surface of the earth, including global beam, spot beam, shaped beam, etc. The shape of the beam is determined by the satellite antenna.
  • RO Random Access Channel Occasion, random access timing.
  • Preamble is a series of sequences sent by terminal equipment to apply for access to the network, including but not limited to gold sequence, m sequence, ZC sequence, etc.
  • the composition of the preamble may also include a cyclic prefix and guard time.
  • the terminal device can support multiple subcarrier spacing types, such as 15kHz, 30kHz, 60kHz, 120kHz, 240kHz, and/or 480kHz.
  • the subcarrier spacing type is inversely proportional to the OFDM symbol length, that is, the greater the subcarrier spacing, the shorter the OFDM symbol length. For example, in FIG. 2, the time length of an OFDM symbol corresponding to a sub-carrier spacing of 15 kHz is 4 times the time length of an OFDM symbol corresponding to a sub-carrier spacing of 60 kHz.
  • FIG. 1 is a schematic diagram of a communication scenario provided by an embodiment of the application. Please refer to FIG. 1, which includes a network device 101 and a terminal device 102, and wireless communication can be performed between the network device 101 and the terminal device 102.
  • the network including the network device 101 and the terminal device 102 can also be called a non-terrestrial communication network (Non-Terrestrial Network, NTN), where NTN refers to the communication between the terminal device and the satellite (also called the network device) The internet.
  • NTN non-terrestrial Network
  • NR New Radio
  • NR refers to a new generation of wireless access network technology, which can be applied to future evolution networks, such as the fifth generation of the future.
  • 5G the 5th Generation Mobile Communication
  • the solutions in the embodiments of this application can also be applied to other wireless communication networks such as Wireless Fidelity (WIFI) and Long Term Evolution (LTE), and the corresponding names can also be used in other wireless communication networks. The name of the function is substituted.
  • WIFI Wireless Fidelity
  • LTE Long Term Evolution
  • IoT Internet of Things
  • MTC machine type communication
  • MTC enhanced machine type communication
  • NB-IoT narrowband Internet of things
  • the existing MTC/eMTC terminal equipment and NB-IoT terminal equipment have the following technical advantages: low cost, low price, support for ultra-low power consumption, and support for deep and extensive coverage scenarios. These technical advantages are conducive to the development of IoT technology. Rapid popularity in the early stages of development.
  • NR MTC terminal device that supports medium transmission rate and medium delay requirements, and has a lower cost.
  • 3GPP calls this type of NR MTC.
  • the type of terminal equipment is NR-light terminal equipment.
  • NR-light terminal equipment needs to support medium transmission rate, support medium delay requirements, and have a lower cost.
  • the following technologies can currently be used Program:
  • the cost of the terminal device can be reduced by reducing the receiving channel supported by the terminal device.
  • the current NR terminal equipment needs to support at least 2 receiving channels. In some frequency bands, NR terminal equipment needs to support 4 receiving channels.
  • Each receiving channel includes a receiving antenna, a filter, and a power amplifier (power amplifier). Amplifier, PA), analog to digital (AD) sampler and other components.
  • the transmission bandwidth supported by the terminal device can be reduced to reduce the cost of the NR-light terminal device and reduce the power consumption of the NR-light terminal device.
  • normal NR terminal equipment usually supports a wider transmission bandwidth.
  • the current 5G frequency range definition includes: FR1 (450MHz-6000MHz, also known as Sub-6GHz) and FR2 (24250MHz-52600MHz, also known as Above-6GHz) Or millimeter wave), where the terminal equipment corresponding to FR1 needs to support a maximum bandwidth of 100MHz.
  • NR-light terminal equipment can be set to support a smaller terminal bandwidth.
  • NR-light terminal equipment can only support 5 MHz in FR1 ( Mega Hertz, MHz), or 10MHz, or 20MHz terminal bandwidth.
  • the system bandwidth and terminal bandwidth may reach a bandwidth of hundreds of MHz or even several GHz to support high-speed mobile data transmission, but In actual data transmission, such a large bandwidth is not required all the time.
  • the terminal device in working scenarios that only need to support low data rate transmission (such as WeChat chat), the terminal device only needs to use a small working bandwidth, such as 10MHz The bandwidth is sufficient.
  • 5G introduces the concept of bandwidth part (BWP, bandwidth part).
  • BWP bandwidth part
  • the bandwidth part may be a part of the system bandwidth (cell carrier bandwidth).
  • the system bandwidth is 100MHz
  • the terminal device may use a bandwidth less than 100MHz.
  • 20MHz and 50MHz bandwidth parts may be used for data transmission within the system bandwidth.
  • the bandwidth part may also be called “carrier bandwidth part", or may be called “operating bandwidth (operating bandwidth), or transmission bandwidth.
  • the name and abbreviation of the bandwidth part are not particularly limited in the embodiments of the present application.
  • both frequency division duplex (Frequency Division Duplex, FDD) or time division duplex (Time Division Duplex, TDD) systems support BWP.
  • a BWP can include continuous or non-contiguous K>0 subcarriers; or, a BWP can be a frequency domain resource where N>0 non-overlapping continuous or non-contiguous resource blocks (Resource Block) are located; or, one BWP is the frequency domain resource where M>0 non-overlapping contiguous or non-contiguous resource block groups (Resource Block Group, RBG) are located.
  • An RBG includes P>0 contiguous RBs, where K, N, M, and P are all Is an integer.
  • the NR terminal device can be configured with a maximum of 4 BWPs by high-level signaling, where the terminal device only needs to use the center frequency and sampling rate of the corresponding BWP in the corresponding BWP.
  • each BWP is not only different in frequency and bandwidth, each BWP can correspond to different configurations. For example, the sub-carrier spacing, CP type, SSB (PSS/SSS PBCH Block) period, etc. of each BWP can be configured differently to adapt to different services.
  • the network equipment can make the terminal equipment switch between multiple BWPs according to the service requirements of the terminal equipment. For example, the terminal equipment can use a larger bandwidth BWP when transmitting at a higher service rate; the terminal equipment is performing a smaller BWP. When transmitting at a higher service data rate, a smaller bandwidth BWP can be used.
  • FIG. 2 is a schematic diagram of BWP provided in an embodiment of the application.
  • the network device can configure a large bandwidth (BWP1) for the terminal device, and it can be assumed that the frequency range of BWP1 is 15KHz ⁇ 40MKz;
  • BWP2 small bandwidth
  • the network device finds that there is a wide range of frequency selective fading in the bandwidth of BWP1, or the resources in the frequency range of BWP1 are relatively scarce.
  • the network device can configure a new bandwidth (BWP3) for the terminal device. It can be assumed that the frequency range of BWP3 is 60KHz ⁇ 20MKz.
  • BWP can be divided into downlink BWP (Downlink BWP, DL BWP) and uplink BWP (Uplink BWP, UL BWP).
  • the network device can configure multiple DL BWP and multiple UL BWP for the terminal device, and Activate at least one DL BWP and activate at least one UL BWP.
  • the terminal device can receive the downlink signal sent by the network device on the active DL BWP (ie active DL BWP), including but not limited to downlink control signaling, downlink data, channel state information reference Signal (ChannelState Information Reference Signal, CSI-RS);
  • active DL BWP including but not limited to downlink control signaling, downlink data, channel state information reference Signal (ChannelState Information Reference Signal, CSI-RS);
  • CSI-RS Channel State Information Reference Signal
  • the terminal equipment can send uplink signals on the UL BWP in the active state, including but not limited to uplink control signaling, uplink data, scheduling request (SR), sounding reference signal (Sounding Reference Signal, SRS), channel State information (Channel State Information, CSI)/Channel Quality Indicator (Channel Quality Indicator, CQI) feedback, etc.
  • uplink control signaling uplink data
  • scheduling request (SR) sounding reference signal
  • SRS Sounding reference signal
  • SRS Sounding Reference Signal
  • SRS Sounding Reference Signal
  • Channel State Information Channel State Information
  • CSI Channel State Information
  • CQI Channel Quality Indicator
  • the network device and the terminal device communicate on the activated DL BWP and UL BWP, the network device can activate another BWP (DL or UL), so that the terminal can switch to the newly activated BWP to receive or send data.
  • the network device and the terminal device communicate on the activated DL BWP and UL BWP
  • the network device can activate another BWP (DL or UL), so that the terminal can switch to the newly activated BWP to receive or send data.
  • the terminal device can use the uplink BWP configured by RRC for uplink data transmission.
  • RRC Radio Resource Control
  • the terminal device Before the RRC connection of the device is established, the terminal device still needs to perform uplink transmission, such as the uplink transmission of the initial access process.
  • the terminal device can receive the system broadcast message from the network device to follow the system The broadcast message determines the initial UL BWP, and performs uplink data transmission according to the initial uplink BWP.
  • FIG. 3 is a schematic diagram of the configuration of the initial uplink BWP in the prior art provided by an embodiment of the application.
  • a reference point point A is set.
  • point A is actually a frequency location, which can be indicated by a network device, or can be preset, or, It may also be predefined, which is not limited in this embodiment.
  • the carrier position and carrier bandwidth of the system bandwidth can be configured based on the reference point point A, where the carrier starting point of the system bandwidth can be the first offset frequency position relative to the reference point point A, in a possible way
  • the first offset can be offset to Carrier physical resource blocks (PRBs), that is, the carrier starting point of the system bandwidth can be the frequency position corresponding to offset to Carrier PRBs relative to the reference point point A.
  • PRBs Carrier physical resource blocks
  • the frequency band position and bandwidth of the initial uplink BWP can be further configured in the carrier bandwidth.
  • the configuration method can be through the starting length indicator vector (starting length indicator) in the carrier bandwidth.
  • the length indication vector (SLIV) parameter indicates the initial PRB of the initial uplink BWP and the number of PRBs occupied by the initial uplink BWP, so that the position of the initial uplink BWP can be determined.
  • subcarrier spacing of the initial uplink BWP can also be configured.
  • the initial uplink BWP obtained by the configuration may be shown in the shaded part of FIG. 3.
  • the physical random access channel (PRACH) resource RO in the NR is configured in the initial uplink BWP.
  • PRACH physical random access channel
  • the network device can configure multiple frequency division multiplex (Frequency Division Multiplex, FDM) ROs at a time instance.
  • FDM Frequency Division Multiplex
  • time point may be the length of time required to transmit one PRACH resource RO, or it may also be understood as the time domain resource location used to transmit the PRACH resource RO.
  • SSB may also be called synchronization signal/physical broadcast channel resource block (Synchronization signal block). /Physical broadcast channel block, SS/PBCH block).
  • the number of SSBs that can be associated with an RO resource can be any of the following Species: ⁇ 1/8,1/4,1/2,1,2,4,8,16 ⁇ .
  • FIG. 4 is a schematic diagram of an association relationship between the RO resource and the associated object in an embodiment of the application.
  • T represents a PRACH resource configuration period
  • one grid represents one RO resource
  • grids with different filling patterns represent RO resources associated with different SSBs.
  • the number of rows in the grid represents the number of RO resources at a time point
  • the number of columns in the grid represents the number of time points.
  • the number of SSBs actually sent by the network device is less than or equal to the number of SSBs that can be sent by the network device.
  • the RO resource may also have an association relationship with channel state reference signals (Channel State Information-Reference Signals, CSI-RS), and the implementation manner is similar to that described above, and will not be repeated here.
  • CSI-RS Channel State Information-Reference Signals
  • RO is configured in the initial uplink BWP.
  • FIG. 3 is a schematic diagram of the RO configuration provided by an embodiment of the application, as shown in FIG.
  • the system can configure the number of ROs multiplexed by FDM in the frequency domain. Assuming that the number of multiplexed ROs is 4, as shown in Figure 3, there are 4 ROs at a time point.
  • the first The frequency starting point of an RO is configured relative to the first PRB (PRB0) of the initial uplink BWP.
  • the frequency starting point of the first RO can be configured to be the frequency position of the second offset relative to PRB0.
  • the second offset may be msg1-frequencystart PRBs, that is, the frequency start of the first RO is offset by msg1-frequencystart PRBs relative to PRB0.
  • the network device may also notify the terminal device of the time slot occupied by the PRACH by the system broadcast message, the symbol occupied by the PRACH in the time slot, and the PRACH format (format).
  • each RO can be determined by the PRACH format, that is, each PRACH format corresponds to the bandwidth occupied by the respective RO, which is not limited in this embodiment.
  • the bandwidth occupied by an RO is already close to 5MHz.
  • the bandwidth of the NR-light terminal device is relatively narrow, for example, it can be 5MHz or 10MHz.
  • the bandwidth occupied by one RO is already close to 5MHz.
  • FDM frequency division multiplexing
  • the terminal device When the bandwidth of the initial uplink BWP configured by the network device is greater than the bandwidth of the terminal device, the terminal device cannot perform normal uplink data transmission under the terminal bandwidth, which will result in abnormal uplink data transmission.
  • this application proposes the following technical idea: instead of using the configuration of the network device to determine the initial uplink BWP, the initial uplink BWP is determined based on the frequency band occupied by the terminal device to send the PRACH.
  • Random access can include four-step random access (also referred to as four-step random access channel, or simply referred to as 4-step RACH, competitive random access) and two-step random access (also referred to as two-step random access).
  • Step random access channel or can also be referred to as 2-step RACH, non-competitive random access), and the random access involved in the embodiment of this application is mainly two-step random access.
  • 4-step RACH and 2-step RACH processes are described in detail.
  • Fig. 5 is a schematic diagram of a 4-step RACH process provided by an embodiment of the application.
  • the 4-step RACH has been defined in detail in the existing protocol TS38.300, and this application only briefly describes it. Referring to Figure 4, the method may include:
  • S501 The terminal device sends Msg1 to the network device.
  • Msg1 can also be called msg1 or MSG1.
  • Msg1 is used to transmit a random access preamble, and the random access preamble may also be referred to as a random access preamble sequence, or preamble, or preamble sequence.
  • the preamble and the time-frequency resources occupied by the preamble transmission are referred to as physical random access channel (PRACH) resources.
  • PRACH physical random access channel
  • the terminal device can select a PRACH resource, select a preamble, and send the selected preamble on the selected PRACH resource. If the random access method is based on non-contention random access, the base station can specify the PRACH resource and preamble, and the base station can estimate the timing advance (TA) based on the preamble sent by the terminal device, and the terminal device transmits Msg3. The required uplink grant size.
  • TA timing advance
  • a network device can broadcast available PRACH resources through system information.
  • S502 The network device sends Msg2 to the terminal device.
  • Msg2 can also be called msg2 or MSG2.
  • Msg2 contains the time-frequency resource that the network device determines to the terminal device to send the payload (payload).
  • the terminal device After the terminal device sends Msg1, it can open a random access response time window (ra-Response Window), and monitor the random access radio network temporary identifier (RA-RNTI) within the random access response time window. ) Scrambled physical downlink control channel (physical downlink control channel, PDCCH).
  • ra-Response Window a random access response time window
  • RA-RNTI random access radio network temporary identifier
  • PDCCH Physical downlink control channel
  • the RA-RNTI is related to the PRACH time-frequency resources used by the terminal equipment to send Msg1.
  • RAR random access response
  • the subheader of the RAR contains a back-off indicator (BI), which is used to indicate the back-off time for retransmitting Msg1.
  • BI back-off indicator
  • RAPID in RAR the preamble index received by the network in response.
  • the payload of the RAR includes a timing advance group (TAG), which is used to adjust uplink timing.
  • TAG timing advance group
  • Uplink (UL) grant an uplink resource indication for scheduling Msg3.
  • C-RNTI Temporary cell radio network temporary identifier
  • the terminal If the terminal receives the PDCCH scrambled by the RAR-RNTI, and the RAR contains the preamble index sent by itself, the terminal considers that it has successfully received the random access response.
  • S503 The terminal device sends Msg3 to the network device.
  • Msg3 can also be called msg3, or MSG3.
  • Msg3 is the first scheduled transmission in the random access process, and the payload is sent, for example, an RRC connection request message, a tracking area update message, and so on.
  • Msg3 can notify the network device of what event triggered the RACH process. For example, if it is an initial access random process, the UE ID and establishment cause will be carried in Msg3; if it is RRC reestablishment, it will carry the connected UE identifier and establishment cause.
  • S504 The network device sends Msg4 to the terminal device.
  • Msg4 can also be called msg4, or MSG4.
  • Msg4 is used to indicate whether the terminal device successfully accesses the network device.
  • Msg4 can have the following two functions: one is to resolve competition conflicts. The other is that the network device transmits the RRC configuration message to the terminal device. There are two ways to resolve the contention conflict: one is that if the terminal device carries the C-RNTI in the Msg3, the Msg4 uses the PDCCH scrambled by the C-RNTI for scheduling. The other is that if the terminal device does not carry C-RNTI in Msg3, such as initial access, Msg4 uses TC-RNTI scrambled PDCCH scheduling. The conflict resolution is that the terminal device receives the PDSCH of Msg4 and matches the PDSCH in the PDSCH.
  • Common control channel common control channel, CCCH
  • SDU service data unit
  • Fig. 6 is a schematic diagram of a 2-step RACH process provided by an embodiment of the application. Referring to Figure 6, the method may include:
  • the terminal device sends an MsgA to the network device.
  • MsgA can also be called msgA, or MSGA.
  • msgA includes preamble and payload (for example, RRC connection request message, tracking area update message, etc.).
  • the network device sends the msgB to the terminal device.
  • msgB can also be called MsgB, or MSGB, and is used to indicate whether the terminal device has successfully accessed the network device.
  • the main purpose of random access is to obtain uplink synchronization between terminal equipment and network equipment (cell).
  • FIG. 7 is the first flowchart of the communication method provided by the embodiment of the present application.
  • the method includes:
  • S701 Determine an initial uplink bandwidth part BWP according to the first bandwidth information corresponding to the first random access channel opportunity RO.
  • the first RO occupies time domain resources and frequency domain resources during transmission. From the perspective of frequency domain resources, the first RO corresponds to first bandwidth information, where the first bandwidth information Used to indicate the frequency range corresponding to the first RO.
  • the first bandwidth information may include, for example, bandwidth; or, may also include frequency position; or, may also include sub-carrier width, etc.
  • the specific implementation of the first bandwidth information is not described in this embodiment. It is particularly limited, it can be selected according to actual needs, and any information used to indicate the frequency range corresponding to the first RO can be used as the first bandwidth information in this embodiment.
  • the initial uplink bandwidth part BWP is determined according to the first bandwidth information, where the initial uplink BWP is used to send uplink data to the network device before the network device configures the uplink BWP for the terminal device.
  • the initial uplink BWP is determined based on the first bandwidth information of the first RO. It can effectively ensure that the initial uplink BWP will not exceed the terminal bandwidth of the terminal device, thereby ensuring that the terminal device can perform normal uplink data transmission.
  • the terminal device will measure the channel quality based on the downlink reference signal, such as SS/PBCH block or CSI-RS, before sending PRACH, so as to select the reference signal receiving power (RSRP).
  • the downlink reference signal such as SS/PBCH block or CSI-RS
  • the RO corresponding to the SS/PBCH or CSI-RS that is better such as greater than a specific threshold, where the association relationship between the SS/PBCH block and the RO and the association relationship between the CSI-RS and the RO have been performed in the above embodiments Introduction, I won’t repeat it here.
  • one SS/PBCH block can correspond to at least one RO
  • one CSI-RS can also correspond to at least one RO
  • the terminal device is determining which SS/PBCH or CSI-RS corresponds to.
  • the terminal device can randomly select one RO from multiple ROs corresponding to SS/PBCH or CSI-RS.
  • the terminal device can select a preamble index in the RO.
  • the terminal device can randomly select a preamble index from multiple preamble indexes. Index, and then the terminal device sends the preamble to the network device in the selected RO, where different beams correspond to different SS/PBCH blocks or CSI-RS, therefore, the RO used by the terminal device to send PRACH and the beam position of the terminal device Related, this also means that different terminals may send different ROs for sending PRACH.
  • the terminal device may need to retransmit the PRACH.
  • the terminal device may need to send PRACH multiple times to complete the random transmission.
  • the terminal device may change the RO for sending the PRACH.
  • the aforementioned terminal equipment may change the RO sending PRACH, and the following situations may exist:
  • the terminal device can use at least two ROs corresponding to the SS/PBCH block or CSI-RS.
  • An RO is randomly selected in the, at this time, the terminal device may change the RO that sends PRACH;
  • the terminal device can only select the RO corresponding to the SS/PBCH block or CSI-RS, that is In other words, the terminal device does not change the RO for sending PRACH at this time.
  • the selection of the RO is selected according to the actual situation, and the basis of the selection is the content introduced above, which is not limited in this embodiment.
  • the first RO in this embodiment may be the RO corresponding to the PRACH that satisfies the first preset condition among multiple ROs, where the first preset condition may include at least the following: One: After the terminal device sends the PRACH in the first RO, the terminal device receives a random access response (Random Access Response, RAR), after the terminal device sends the PRACH in the first RO, the terminal device receives the message msg4 response, the terminal device After the device sends the PRACH in the first RO, the terminal device completes the random access procedure. .
  • RAR Random Access Response
  • the terminal device can determine the first RO based on the RO occupied by the last successfully transmitted PRACH, where the successfully transmitted PRACH refers to: for this PRACH transmission, the terminal device receives The RAR response from the network device is reached; or the msg4 response is received; or the terminal device has completed the random access process.
  • the accuracy and stability of the initial uplink BWP determined according to the bandwidth information corresponding to the current first RO can be ensured, so as to avoid changes in subsequent ROs, resulting in the initial uplink BWP Changes must follow.
  • the communication method provided in the embodiment of the present application includes: determining the initial uplink bandwidth part BWP according to the first bandwidth information corresponding to the first random access channel opportunity RO.
  • Figure 8 is an embodiment of this application.
  • a schematic diagram of the configuration of the initial uplink BWP provided in the first embodiment Figure 9 is a schematic diagram of the configuration of the initial uplink BWP provided in an embodiment of this application
  • Figure 10 is a schematic diagram of the configuration of the initial uplink BWP provided in an embodiment of the application 3
  • Figure 11 is an implementation of this application
  • the first bandwidth information includes the first bandwidth and/or the first frequency position.
  • the second bandwidth of the initial uplink BWP can be determined according to the first bandwidth
  • the second frequency position of the initial uplink BWP is determined.
  • the second bandwidth is the same as the first bandwidth; the first frequency position is the same as the second frequency position.
  • the bandwidth of the first RO may be determined as the bandwidth of the initial uplink BWP, and/or the frequency position occupied by the first RO may be determined as the frequency position of the initial uplink BWP.
  • the NR light terminal device selects RO2 as the RO for sending PRACH, and RO2 meets the first preset condition, the first bandwidth occupied by RO2 and the first frequency position occupied by RO2 are determined as the first uplink BWP.
  • the first frequency position and the second frequency position may include a frequency start position and/or a frequency end position and/or a frequency center frequency point.
  • the first bandwidth information includes the first frequency start position.
  • the second frequency start position of the initial uplink BWP can be determined according to the first frequency start position.
  • the first frequency start position and the second frequency start position are the same.
  • the starting position of the occupied frequency of the first RO is determined as the starting position of the occupied frequency of the initial uplink BWP.
  • the first frequency start position of the frequency occupied by RO2 is determined as the second frequency start point of the initial uplink BWP Location.
  • the initial uplink BWP bandwidth, subcarrier interval and other parameters used by the NR light terminal device can be indicated by the system broadcast message sent by the network device, and then the system broadcast message from the network device can be received. Determine the second bandwidth of the initial uplink BWP and the subcarrier brief of the initial uplink BWP according to the system broadcast message.
  • the initial uplink BWP can be determined according to the position of the second frequency starting point and the bandwidth.
  • the first bandwidth information includes the end position of the first frequency.
  • the second frequency end position of the initial uplink BWP can be determined according to the first frequency end position.
  • the end position of the second frequency is the same as the end position of the first frequency.
  • the end position of the occupied frequency of the first RO is determined as the end position of the frequency of the initial uplink BWP.
  • the first frequency end position of the frequency occupied by RO2 is determined as the second frequency end position of the initial uplink BWP.
  • the initial uplink BWP bandwidth, subcarrier interval and other parameters used by the NR light terminal device can be indicated by the system broadcast message sent by the network device, and then the system broadcast message from the network device can be received. Determine the second bandwidth of the initial uplink BWP and the subcarrier brief of the initial uplink BWP according to the system broadcast message.
  • the initial uplink BWP can be determined according to the end position of the second frequency and the bandwidth.
  • the first bandwidth information includes the first frequency center frequency point.
  • the second frequency center frequency point of the initial uplink BWP can be determined according to the first frequency center frequency point.
  • the first frequency center frequency point is the same as the second frequency center frequency point.
  • the center frequency point of the occupied frequency of the first RO is determined as the frequency center frequency point of the initial uplink BWP.
  • the NR light terminal device selects RO2 as the RO for sending PRACH, and RO2 satisfies the first preset condition, the first frequency center frequency point of the frequency occupied by RO2 is determined as the frequency position of the initial uplink BWP The second frequency center frequency point.
  • the initial uplink BWP bandwidth, subcarrier interval and other parameters used by the NR light terminal device can be indicated by the system broadcast message sent by the network device, and then the system broadcast message from the network device can be received. Determine the second bandwidth of the initial uplink BWP and the subcarrier brief of the initial uplink BWP according to the system broadcast message.
  • the initial uplink BWP can be determined according to the second frequency center frequency point and bandwidth.
  • the terminal device determines the initial uplink BWP based on the first RO that sends the PRACH
  • the network device will still configure the initial uplink BWP for the terminal device through a system broadcast message.
  • the initial uplink BWP configured by the network device is called the second initial uplink BWP, to distinguish it from the initial uplink BWP introduced in the foregoing embodiment. It is worth noting that although the network device will be configured, the terminal device is not Will be determined based on this configuration.
  • the terminal device will not use the configuration of the network device to determine the initial uplink BWP, the terminal device can still determine the configuration information of the RO according to the second initial uplink BWP configured by the network device.
  • the determination method of refer to the description in the embodiment in FIG. 3, which is not repeated here.
  • the technical solution of the present application is to realize compatibility between terminal devices and to realize RO sharing between different terminal devices.
  • the terminal device determines to send the PRACH through the first RO, and during the initial access process, the subsequent uplink data transmission may also be transmitted on the frequency band corresponding to the first RO, so that the terminal device There is no need to switch the transmission frequency between sending PRACH and subsequent uplink data transmission.
  • the network equipment also needs to determine the initial uplink BWP for the terminal to send uplink data in order to receive data.
  • the communication method on the network device side is introduced with reference to FIG. 12.
  • FIG. 12 is a second flowchart of a communication method provided by an embodiment of this application.
  • the method includes:
  • the terminal device will send a PRACH to the network device, so the network device can receive the PRACH sent by the terminal device.
  • S1202. Determine the initial uplink bandwidth part BWP corresponding to the terminal device according to the first random access channel opportunity RO corresponding to the PRACH, where the initial uplink BWP is determined according to the first bandwidth information corresponding to the first RO.
  • the PRACH corresponds to the first RO.
  • the first RO is the RO that satisfies the second preset condition and sends the PRACH.
  • the specific implementation of the first RO is the same as that described in the above embodiment The content is similar, and the only difference is that the first RO in this embodiment needs to meet the second preset condition, and the second preset condition is somewhat different from the first preset condition.
  • the second preset condition includes at least one of the following: receiving the PRACH from the terminal device in the first RO, and receiving the message msg3 from the terminal device in the first RO Response, where msg3 response is the response message corresponding to PRACH.
  • the terminal device will first send PRACH to the network device. If the network device successfully receives the PRACH from the terminal device, the network device can determine the terminal device at this time. Once the RO corresponding to the uplink data is sent, the first RO can be determined at this time; or the network device can determine the first RO when receiving the msg3 response from the terminal device.
  • the terminal device Taking the network device receiving the PRACH from the terminal device as an example, what I want to emphasize here is that in the first preset condition, the terminal device also needs to receive the RAR sent by the network device before it may be able to determine the first RO. However, the network device can determine the first RO before sending the RAR to the terminal device, that is, the first RO determined by the network device and the terminal device are the same, but the time determined by the two is different.
  • the network device if the network device receives the PRACH from the terminal device and determines the first RO corresponding to the PRACH, then the network device will send the RAR to the terminal device, and the terminal device may not receive the RAR. In this case, if the terminal device does not receive the RAR, it will consider the random access failure and may resend the PRACH. Therefore, the first RO determined by the terminal device and the network device must be the same.
  • the initial uplink BWP corresponding to the terminal device can be determined according to the first RO corresponding to the PRACH, where the initial uplink BWP corresponding to the terminal device is determined according to the first bandwidth information corresponding to the first RO, and the specific implementation is Reference may be made to the introduction in the foregoing embodiment, which will not be repeated here.
  • the communication method provided by the embodiment of the present application includes: receiving a physical random access channel PRACH from a terminal device.
  • the initial uplink bandwidth part BWP corresponding to the terminal device is determined, where the initial uplink BWP is determined according to the first bandwidth information corresponding to the first RO.
  • the initial uplink BWP is determined according to the first bandwidth information of the first RO
  • the frequency bandwidth occupied by some ROs is only six 15KHz PRBs
  • the NRlight terminal The bandwidth of the device may no longer be the bottleneck of uplink data transmission. That is to say, in this case, the terminal device can perform uplink data transmission according to the second initial uplink BWP configured by the network device.
  • the NR-light terminal device can determine the second initial uplink BWP based on the network device configuration system broadcast information.
  • the network device does not configure the initial uplink BWP for the NR-light terminal (for example, the terminal device does not receive the configuration information of the second initial uplink BWP in the system broadcast message)
  • the first RO based on the first RO described above can be used.
  • the bandwidth information determines the initial uplink BWP.
  • the configuration information of the second initial uplink BWP configured by the network device may be used to determine the first 2.
  • the first bandwidth information corresponding to the first RO may be used to determine the initial uplink BWP.
  • FIG. 13 is a first structural diagram of a communication device provided by an embodiment of this application.
  • the communication device 130 may include a determining module 1301 and a receiving module 1302, where:
  • the determining module 1301 is configured to determine the initial uplink bandwidth part BWP according to the first bandwidth information corresponding to the first random access channel opportunity RO.
  • the first bandwidth information is used to indicate the frequency range corresponding to the first RO.
  • the first bandwidth information includes a first bandwidth and/or a first frequency position.
  • the determining module 1301 is specifically configured to:
  • the second frequency position of the initial uplink BWP is determined.
  • the second bandwidth and the first bandwidth are the same; the first frequency position and the second frequency position are the same.
  • the first bandwidth information includes a first frequency starting point position.
  • the determining module 1301 is specifically configured to determine the second frequency start position of the initial uplink BWP according to the first frequency start position.
  • the first frequency start position and the second frequency start position are the same.
  • the first bandwidth information includes a first frequency end position.
  • the determining module 1301 is specifically configured to:
  • the second frequency end position of the initial uplink BWP is determined.
  • the second frequency end position is the same as the first frequency end position.
  • the first bandwidth information includes a first frequency center frequency point.
  • the determining module 1301 is specifically configured to:
  • the second frequency center frequency point of the initial uplink BWP is determined.
  • the first frequency center frequency point and the second frequency center frequency point are the same.
  • it further includes: a receiving module 1302;
  • the receiving module 1302 is specifically configured to receive a system broadcast message from a network device, where the system broadcast message is used to indicate the second bandwidth of the initial uplink BWP and the subcarrier interval of the initial uplink BWP.
  • the first RO is an RO that meets a first preset condition among multiple ROs.
  • the first preset condition includes at least one of the following: after the terminal device sends the physical random access channel PRACH in the first RO, the terminal device receives the random access Incoming response RAR, after the terminal device sends the PRACH in the first RO, the terminal device receives the message msg4 response, and after the terminal device sends the PRACH in the first RO, the terminal device completes the random access process.
  • the receiving module 1302 is further configured to:
  • the initial uplink BWP is used to send uplink data to the network device before the network device configures the uplink BWP for the terminal device.
  • the communication device provided in the embodiments of the present application can execute the technical solutions shown in the foregoing method embodiments, and the implementation principles and beneficial effects are similar, and details are not described herein again.
  • FIG. 14 is a second structural diagram of a communication device provided by an embodiment of this application.
  • the communication device 140 may include a transceiving module 1401 and a determining module 1402, where:
  • the transceiver module 1401 is used to receive the physical random access channel PRACH from the terminal equipment;
  • the determining module 1402 is configured to determine the initial uplink bandwidth part BWP corresponding to the terminal device according to the first random access channel opportunity RO corresponding to the PRACH, wherein the initial uplink BWP is based on the first RO corresponding to the first RO A bandwidth information is determined.
  • the first bandwidth information is used to indicate the frequency range corresponding to the first RO.
  • the first bandwidth information includes a first bandwidth and/or a first frequency position.
  • the second bandwidth of the initial uplink BWP is determined according to the first bandwidth
  • the second frequency position of the initial uplink BWP is determined according to the first frequency position.
  • the second bandwidth and the first bandwidth are the same; the first frequency position and the second frequency position are the same.
  • the first bandwidth information includes a first frequency starting point position.
  • the second frequency start position of the initial uplink BWP is determined according to the first frequency start position.
  • the first frequency start position and the second frequency start position are the same.
  • the first bandwidth information includes a first frequency end position.
  • the second frequency end position of the initial uplink BWP is determined according to the first frequency end position.
  • the second frequency end position is the same as the first frequency end position.
  • the first bandwidth information includes a first frequency center frequency point.
  • the second frequency center frequency point of the initial uplink BWP is determined according to the first frequency center frequency point.
  • the first frequency center frequency point and the second frequency center frequency point are the same.
  • the transceiver module 1401 is further configured to:
  • the first RO is an RO that meets a second preset condition among multiple ROs.
  • the second preset condition includes at least one of the following: receiving the PRACH from the terminal device in the first RO, and receiving in the first RO The message msg3 response from the terminal device, where the msg3 response is a response message corresponding to the PRACH.
  • the transceiver module 1401 is further configured to:
  • the network device sends first configuration information to the terminal device, where the first configuration information is used to indicate bandwidth information corresponding to the multiple ROs.
  • the initial uplink BWP is used to receive uplink data sent by the terminal device before the network device configures the uplink BWP for the terminal device.
  • the communication device provided in the embodiments of the present application can execute the technical solutions shown in the foregoing method embodiments, and the implementation principles and beneficial effects are similar, and details are not described herein again.
  • FIG. 15 is a schematic structural diagram of a terminal device provided by an embodiment of the application.
  • the terminal device 20 may include: a transceiver 21, a memory 22, and a processor 23.
  • the transceiver 21 may include a transmitter and/or a receiver.
  • the transmitter can also be referred to as a transmitter, a transmitter, a transmitting port, or a transmitting interface
  • the receiver can also be referred to as a receiver, a receiver, a receiving port, or a receiving interface, and other similar descriptions.
  • the transceiver 21, the memory 22, and the processor 23 are connected to each other through a bus 24.
  • the memory 22 is used to store program instructions
  • the processor 23 is configured to execute program instructions stored in the memory, so as to enable the terminal device 20 to execute any of the communication methods shown above.
  • the receiver of the transceiver 21 can be used to perform the receiving function of the terminal device in the above-mentioned communication method.
  • FIG. 16 is a schematic structural diagram of a network device provided by an embodiment of this application.
  • the network device 20 may include: a transceiver 31, a memory 32, and a processor 33.
  • the transceiver 31 may include: a transmitter and/or a receiver.
  • the transmitter can also be referred to as a transmitter, a transmitter, a transmitting port, or a transmitting interface
  • the receiver can also be referred to as a receiver, a receiver, a receiving port, or a receiving interface, and other similar descriptions.
  • the transceiver 31, the memory 32, and the processor 33 are connected to each other through a bus 34.
  • the memory 32 is used to store program instructions
  • the processor 33 is configured to execute program instructions stored in the memory, so as to enable the terminal device 20 to execute any of the communication methods shown above.
  • the receiver of the transceiver 31 can be used to perform the receiving function of the terminal device in the above-mentioned communication method.
  • An embodiment of the present application provides a computer-readable storage medium that stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, it is used to implement the above-mentioned communication method.
  • An embodiment of the present application provides a computer-readable storage medium that stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, it is used to implement the above-mentioned communication method.
  • the embodiments of the present application may also provide a computer program product, which can be executed by a processor, and when the computer program product is executed, it can implement the communication method executed by any of the terminal devices shown above.
  • the communication device, computer-readable storage medium, and computer program product of the embodiments of the present application can execute the communication method executed by the above-mentioned terminal device.
  • the specific implementation process and beneficial effects refer to the above, and will not be repeated here.
  • the disclosed system, device, and method can be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.
  • the aforementioned computer program can be stored in a computer readable storage medium.
  • the computer program When the computer program is executed by the processor, it realizes the steps including the foregoing method embodiments; and the foregoing storage medium includes: ROM, RAM, magnetic disk, or optical disk and other media that can store program codes.

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Abstract

本申请实施例提供一种通信方法及装置,该方法包括:根据第一随机接入信道时机RO所对应的第一带宽信息,确定初始上行带宽部分BWP。通过根据第一RO所对应的第一带宽信息确定初始上行BWP,能够有效保证初始上行BWP不会超过终端设备的终端带宽,从而保证了终端设备能够进行正常的上行数据传输。

Description

通信方法及装置 技术领域
本申请涉及通信技术,尤其涉及一种通信方法及装置。
背景技术
在5G的新空口(new radio,NR)中,为了降低终端的功耗,网络设备将给终端设备配置带宽部分(bandwidth part,BWP),终端可以通过BWP与网络设备进行通信。
目前,在进行随机接入过程时,终端设备通常接收网络设备发送的系统广播消息,并根据系统广播消息确定初始上行BWP,从而可以在初始上行BWP中进行随机接入过程的上行传输,其中,物理随机接入信道的资源随机接入信道时机(RACH occasion,RO)是在初始上行BWP中配置的。
然而,当存在多个频分复用的RO时,多个RO所对应的带宽可能大于终端的带宽,则初始上行BWP的带宽就会大于终端的带宽,这样会导致终端无法正常的在NR系统中进行上行数据的传输。
发明内容
本申请实施例提供一种通信方法及装置,以避免初始上行BWP的带宽大于终端的带宽,导致终端无法正常的在NR系统中进行上行数据的传输。
第一方面,本申请实施例提供一种通信方法,包括:
根据第一随机接入信道时机RO所对应的第一带宽信息,确定初始上行带宽部分BWP。
第二方面,本申请实施例提供一种通信方法,包括:
接收来自于终端设备的物理随机接入信道PRACH;
根据所述PRACH对应的第一随机接入信道时机RO,确定所述终端设备对应的初始上行带宽部分BWP,其中,所述初始上行BWP是根据第一RO所对应的第一带宽信息确定的。
第三方面,本申请实施例提供一种通信装置,包括:
确定模块,用于根据第一随机接入信道时机RO所对应的第一带宽信息,确定初始上行带宽部分BWP。
第四方面,本申请实施例提供一种通信装置,包括:
收发模块,用于接收来自于终端设备的物理随机接入信道PRACH;
确定模块,用于根据所述PRACH对应的第一随机接入信道时机RO,确定所述终端设备对应的初始上行带宽部分BWP,其中,所述初始上行BWP是根据第一RO所对应的第一带宽信息确定的。
第五方面,本申请实施例提供一种终端设备,包括:收发器、处理器、存储器;
所述存储器存储计算机执行指令;
所述处理器执行所述存储器存储的计算机执行指令,使得所述处理器执行如权利要求1至19任一项所述的通信方法。
第六方面,本申请实施例提供一种网络设备,包括:收发器、处理器、存储器;
所述存储器存储计算机执行指令;
所述处理器执行所述存储器存储的计算机执行指令,使得所述处理器执行如权利要求20至38任一项所述的通信方法。
第七方面,本申请实施例提供一种计算机可读存储介质,所述计算机可读存储介质中存储有计算机执行指令,当所述计算机执行指令被处理器执行时用于实现如权利要求1至19任一项所述的通信方法。
第八方面,本申请实施例提供一种计算机可读存储介质,所述计算机可读存储介质中存储有计算机执行指令,当所述计算机执行指令被处理器执行时用于实现如权利要求20至38任一项所 述的通信方法。
本申请实施例提供一种通信方法及装置,该方法包括:根据第一随机接入信道时机RO所对应的第一带宽信息,确定初始上行带宽部分BWP。通过根据第一RO所对应的第一带宽信息确定初始上行BWP,能够有效保证初始上行BWP不会超过终端设备的终端带宽,从而保证了终端设备能够进行正常的上行数据传输。
附图说明
图1为本申请实施例提供的通信场景的示意图;
图2为本申请实施例提供的BWP示意图;
图3为本申请实施例提供的现有技术的初始上行BWP的配置示意图;
图4为本申请实施例的RO资源与关联对象的一种关联关系示意图;
图5为本申请实施例提供的4-step RACH的流程示意图;
图6为本申请实施例提供的2-step RACH的流程示意图;
图7为本申请实施例提供的通信方法的流程图一;
图8为本申请实施例提供的初始上行BWP的配置示意图一;
图9为本申请实施例提供的初始上行BWP的配置示意图二;
图10为本申请实施例提供的初始上行BWP的配置示意图三;
图11为本申请实施例提供的初始上行BWP的配置示意图四;
图12为本申请实施例提供的通信方法的流程图二;
图13为本申请实施例提供的通信装置的结构示意图一;
图14为本申请实施例提供的通信装置的结构示意图二;
图15为本申请实施例提供的终端设备的结构示意图;
图16为本申请实施例提供的网络设备的结构示意图。
具体实施方式
为了便于理解,首先对本申请涉及的概念进行解释说明。
3GPP:3rd Generation Partnership,第三代合作伙伴计划。
终端设备:可以为包含无线收发功能、且可以与网络设备配合为用户提供通讯服务的设备。具体地,终端设备可以指用户设备(User Equipment,UE)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。例如,终端设备可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol,SIP)电话、无线本地环路(Wireless Local Loop,WLL)站、个人数字处理(Personal Digital Assistant,PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备,未来5G网络或5G之后的网络中的终端设备等。
网络设备:网络设备可以是用于与终端设备进行通信的设备,例如,可以是全球移动通信系统(Global System for Mobile Communication,GSM)或码分多址(Code Division Multiple Access,CDMA)通信系统中的基站(Base Transceiver Station,BTS),也可以是宽带码分多址(Wideband Code Division Multiple Access,WCDMA)系统中的基站(NodeB,NB),还可以是LTE系统中的演进型基站(Evolutional Node B,eNB或eNodeB),或者该网络设备可以为中继站、接入点、车载设备、可穿戴设备以及未来5G网络或5G之后的网络中的网络侧设备或未来演进的公共陆地移动网络(Public Land Mobile Network,PLMN)网络中的网络设备等。
本申请实施例中涉及的网络设备也可称为无线接入网(Radio Access Network,RAN)设备。RAN设备与终端设备连接,用于接收终端设备的数据并发送给核心网设备。RAN设备在不同通信系统中对应不同的设备,例如,在2G系统中对应基站与基站控制器,在3G系统中对应基站与无线网络控制器(Radio Network Controller,RNC),在4G系统中对应演进型基站(Evolutional Node B,eNB),在5G系统中对应5G系统,如NR中的接入网设备(例如gNB,集中单元CU,分布式单元DU)。
随机接入过程:随机接入过程是指终端设备发射随机接入前导码到与网络设备间建立起基本的信令连接之前的过程,是指终端设备与网络设备建立无线链路,获取或恢复上行同步的过程。随机接入是移动通信系统中的关键步骤,使得终端设备和网络设备建立通信连接成为可能。终端设备通过随机接入与 网络设备进行信息交互,也能够通过随机接入实现上行同步。
波束:指的是由卫星天线发射出来的电磁波在地球表面上形成的形状,有全球波束、点形波束、赋形波束等,由卫星天线决定波束的形状。
RO:Random Access Channel Occasion,随机接入时机。
Preamble:前导,前导码,是终端设备为申请接入网络而发送的一串序列,包括但不限于gold序列、m序列、ZC序列等。前导码的组成除了包括主序列以外,还可能包括循环前缀和保护时间。
子载波:终端设备可以支持多种子载波间隔类型,比如15kHz、30kHz、60kHz、120kHz、240kHz和/或480kHz等。在正交频分复用(orthogonalfrequency duplex multiplexing,OFDM)系统中,子载波间隔类型和OFDM的符号长度成反比,即子载波间隔越大,OFDM符号长度越短。例如,图2中,子载波间隔15kHz所对应的一个OFDM符号的时间长度是子载波间隔60kHz时对应的一个OFDM符号的时间长度的4倍。
下面,结合图1,对本申请中的通信方法所适用的场景进行说明。
图1为本申请实施例提供的通信场景的示意图。请参见图1,包括网络设备101和终端设备102,网络设备101和终端设备102之间可以进行无线通信。
其中,包括网络设备101和终端设备102的网络还可以称为非地面通信网络(Non-Terrestrial Network,NTN),其中,NTN是指终端设备和卫星(还可以称为网络设备)之间的通信网络。
可以理解的是,本申请实施例的技术方案可应用于新无线(New Radio,NR)通信技术中,NR是指新一代无线接入网络技术,可以应用在未来演进网络,如未来第五代移动通信(the 5th Generation Mobile Communication,5G)系统中。本申请实施例中的方案还可以应用于无线保真(Wireless Fidelity,WIFI)和长期演进(Long Term Evolution,LTE)等其他无线通信网络中,相应的名称也可以用其他无线通信网络中的对应功能的名称进行替代。
本申请实施例描述的网络架构以及业务场景是为了更加清楚的说明本申请实施例的技术方案,并不构成对于本申请实施例提供的技术方案的限定,本领域普通技术人员可知,随着网络架构的演变和新业务场景的出现,本申请实施例提供的技术方案对于类似的技术问题,同样适用。
下面对本申请的相关技术背景进行说明:
在无线通信技术的不断演进与助力下,物联网(Internet of things,IoT)技术也迎来了飞速发展,例如3GPP组织推动发展的机器类型通信(machine type communication,MTC)/增强机器类通信(enhance machine type communication,eMTC),窄带物联网(narrow band Internet of things,NB-IoT)系列的标准已经成为5G大容量(Massive)MTC技术的候选技术标准。
其中,上述介绍的技术标准有望在智能家居,智慧城市,智慧工厂、远程监测、智慧交通等人们生产与生活的方方面面发挥巨大作用。
目前,现有的MTC/eMTC终端设备、NB-IoT终端设备的具有如下技术优势:成本较低、价格便宜、支持超低功耗、支持深广大覆盖场景,这些技术优势有利于物联网技术的发展初期的快速普及。
然而,这些技术优势也对应的使得MTC/eMTC、NB-IoT具有一些应用场景的限制,可以理解的是,由于MTC/eMTC、NB-IoT的设计目标是支持一些低数据速率、较高传输时延的应用,因此针对一些需要具有相对较高速率的物联网场景,例如智能安防中的视频监控、要求相对较低时延的工业应用等物联网场景,则不能应用上述介绍的MTC/eMTC终端设备、NB-IoT终端设备。
在这种情况下,若是直接采用NR终端设备,因为NR终端设备的设计指标,如传输速率、传输时延等方面远超过上述介绍的需要具有相对较高速率的物联网场景的实际需求,因此直接将NR终端设备应用于上述介绍的物联网场景,会使得成本上相对较高,从而导致不利于市场竞争。
基于上述介绍的问题,为了完善5G massive MTC场景的终端体系,当前需要设计一种支持中等传输速率、中等时延要求,同时具有较低成本的NR MTC终端设备,目前,3GPP称这种NR MTC类型的终端设备为NR-light终端设备。
基于上述介绍的内容可以确定的是,NR-light终端设备需要支持中等传输速率、支持中等时延要求、以及具有较低成本,为了使得NR-light终端设备满足这些需求,目前可以采用如下的技术方案:
在一种可能的实现方式中,可以通过减少终端设备所支持的接收通道,以降低终端设备的成本。
具体的,目前NR的终端设备至少需要支持2个接收通道,在某些频段上,NR终端设备需要支持4个接收通道,其中,每一个接收通道均包含接收天线、滤波器、功率放大器(power amplifier, PA),模拟至数字(analog to digital,AD)采样器等元器件。
因此,减少NR终端设备需要配备的射频通道(接收通道)的数目可以显著的降低终端设备的成本,有研究结果表明,若将具有两个射频通道的终端设备缩减为具有一个射频通道的终端设备,则该终端设备的芯片模组的成本可降低约1/3,因此,在NR-light终端设备中可以减少接收通道的数量、装配较少的天线数目,以实现降低终端设备的成本。
在另一种可能的实现方式中,可以通过降低终端设备所支持的传输带宽,以降低NR-light终端设备的成本,以及减少NR-light终端设备的功耗。
具体的,正常NR终端设备通常支持较宽的传输带宽,例如目前5G频率范围定义包括:FR1(450MHz-6000MHz,又被称为Sub-6GHz)和FR2(24250MHz-52600MHz,又称为Above-6GHz或毫米波),其中,FR1所对应的终端设备需要支持最大100MHz的带宽。
为了降低NR-light终端设备的成本以及降低NR-light终端设备的功耗,可以设置NR-light终端设备支持较小的终端带宽,例如NR-light终端设备可以在FR1中仅支持5兆赫兹(Mega Hertz,MHz)、或者10MHz、或者20MHz的终端带宽。
针对上述介绍的另一种可能的实现方式,本领域技术人员可以理解的是,在5G NR中,系统带宽与终端带宽可能都会达到数百MHz甚至数GHz的带宽以支持高速移动数据传输,但是在实际数据传输时,并非时时刻刻都需要如此大的带宽,例如,在仅需支持低数据速率传输的工作场景时(如微信聊天),终端设备仅需要采用较小的工作带宽,例如10MHz的带宽就已经足够。
为了灵活支持上述不同场景的不同带宽需求,5G引入了带宽部分(BWP,bandwidth part)的概念。
其中,带宽部分可以是系统带宽(小区载波带宽)的一部分,例如系统带宽为100MHz,终端设备可以采用小于100MHz的带宽,例如可以采用20MHz、50MHz的带宽部分在系统带宽内部进行数据传输。该带宽部分也可以叫做“载波带宽部分(carrier bandwidth part)”,也可以叫做“工作带宽(operating bandwidth),或者传输带宽,本申请实施例中对带宽部分的名称以及简称不做特别限制。
针对图1所示的通信系统的架构,在5G NR中,在频分双工(Frequency Division Duplex,FDD)或者时分双工(Time Division Duplex,TDD)的系统中,都支持BWP。
例如,一个BWP可以包括连续或非连续的K>0个子载波;或者,一个BWP可以为N>0个不重叠的连续或非连续的资源块(Resource Block)所在的频域资源;或者,一个BWP为M>0个不重叠的连续或非连续的资源块组(ResourceBlock Group,RBG)所在的频域资源,一个RBG包括P>0个连续的RB,其中,K、N、M、P均为整数。
在一种可能的实现方式中,NR终端设备可以被高层信令配置最多4个BWP,其中,终端设备在对应的BWP内只需要采用对应BWP的中心频点和采样率即可。而且,每个BWP不仅仅是频点和带宽不一样,每个BWP可以对应不同的配置。比如,每个BWP的子载波间隔,CP类型,SSB(PSS/SSS PBCH Block)周期等都可以差异化配置,以适应不同的业务。
其中,网络设备可以根据终端设备的业务需求使得终端设备在多个BWP之间进行切换,例如终端设备在进行较高业务速率的传输时,可以使用较大带宽的BWP;终端设备在进行较小的业务数据速率的传输时,可以使用较小带宽的BWP。
下面结合图2对BWP的一种可能的实现方式介绍,图2为本申请实施例提供的BWP示意图。
如图2所示,当前存在多个时刻:
假设在第一时刻t1,终端设备的的业务量较大,网络设备可以给终端设备配置一个大带宽(BWP1),可以假设BWP1的频率范围是15KHz~40MKz;
假设在第二时刻t2,终端设备的的业务量较小,网络设备可以给终端设备配置一个小带宽(BWP2),可以假设BWP2的频率范围是15KHz~10MKz,只要BWP2可以满足终端设备的基本的通信需求即可;
假设在第三时刻t3,网络设备发现BWP1所在带宽内有大范围频率选择性衰落,或者,BWP1所在频率范围内资源较为紧缺,此时网络设备可以给终端设备配置一个新的带宽(BWP3),可以假设BWP3的频率范围是60KHz~20MKz。
本领域技术人员可以理解的是,上述结合图2对BWP所进行的介绍所展示的是一种示例性的情况,在实际实现过程中,BWP的实现方式可以根据实际需求进行选择,本实施例对此不做特别限制。
在实际实现过程中,BWP可以分为下行BWP(Downlink BWP,DL BWP)和上行BWP(Uplink  BWP,UL BWP),其中,网络设备可以为终端设备配置多个DL BWP以及多个UL BWP,并且激活至少一个DL BWP和激活至少一个UL BWP。
在一种可能的实现方式中,终端设备可以在处于激活状态的DL BWP(即active DL BWP)上接收网络设备发送的下行信号,包括但不限于下行控制信令、下行数据、信道状态信息参考信号(ChannelState Information Reference Signal,CSI-RS);
以及,终端设备可以在处于激活状态的UL BWP上发送上行信号,包括但不限于上行控制信令、上行数据、调度请求(Scheduling Request,SR),探测参考信号(Sounding Reference Signal,SRS),信道状态信息(Channel StateInformation,CSI)/信道质量指示(Channel Quality Indicator,CQI)反馈等等。
当网络设备与终端设备在处于激活状态的DL BWP和UL BWP上通信时,网络设备可以激活另一个BWP(DL或者UL),从而使得终端转换(switch)到新的激活的BWP上接收或者发送数据。
本领域技术人员可以理解的是,在网络设备和终端设备的无线资源控制(Radio Resource Control,RRC)连接建立之后,终端设备可以使用RRC配置的上行BWP进行上行数据传输,而在网络设备和终端设备的RRC连接建立之前,终端设备仍然需要进行上行传输,例如初始接入过程的上行传输,在进行初始接入过程的上行传输时,终端设备可以接收来自网络设备的系统广播消息,以根据系统广播消息确定初始(initial)UL BWP,并根据初始上行BWP进行上行数据传输。
下面结合图3对现有技术中配置初始上行BWP的实现方式进行介绍,图3为本申请实施例提供的现有技术的初始上行BWP的配置示意图。
如图3所示,设置有参考点point A,本领域技术人员可以理解的是,point A实际上就是一个频率位置,其可以为网络设备指示的,或者,还可以为预设的,或者,还可以为预定义的,本实施例对此不做限制。
参见图3,可以基于参考点point A配置系统带宽所在的载波位置以及载波带宽,其中,系统带宽的载波起点可以是相对于参考点point A的第一偏置的频率位置,在一种可能的实现方式中,第一偏置可以为offsettoCarrier个物理资源块(physical resource blocks,PRB),也就是说,系统带宽的载波起点可以是相对于参考点point A偏置offsettoCarrier个PRB所对应的频率位置。
在确定载波带宽的基础上,可以进一步在载波带宽内配置初始上行BWP的频带位置以及带宽,在一种可能的实现方式中,配置的方法可以是在载波带宽内通过起始长度指示向量(starting length indication vector,SLIV)参数指示初始上行BWP的起始PRB以及初始上行BWP所占用的PRB个数,从而可以确定初始上行BWP的位置。
进一步地,还可以配置初始上行BWP的子载波间隔。
示例性的,配置得到的初始上行BWP可以如图3的阴影部分所示。
在上述介绍的初始上行BWP的基础上,在进行随机接入过程时,NR中的物理随机接入信道(Physical random access channel,PRACH)资源RO是在初始上行BWP中配置的。
首先对PRACH资源RO进行说明:
在NR系统中,网络设备可以在一个时间点(time instance)上配置多个频分复用(Frequency Division Multiplex,FDM)的RO。
其中,在一个PRACH资源配置周期内,可以存在多个时间点,时间点可以是传输一个PRACH资源RO所需的时长,或者,也可以理解为用于传输PRACH资源RO的时域资源位置。
在一种可能的实现方式中,在NR中,RO可能与同步信号块(Synchronization signal block,SSB)之间存在关联关系,其中,SSB也可以称为同步信号/物理广播信道资源块(Synchronization signal/Physical broadcast channel block,SS/PBCH block)。
在NR中,RO资源和网络设备实际发送的SSB之间可能存在关联关系,且一个RO资源上可能关联多个SSB,具体来说,一个RO资源可以关联的SSB数目可以是如下中的任一种:{1/8,1/4,1/2,1,2,4,8,16}。
下面结合图4对RO资源和SSB之间的关联关系进行示例性的介绍,图4为本申请实施例的RO资源与关联对象的一种关联关系示意图。
例如,如图4所示,假设图4中共有3个SSB,且这3个SSB编号为1-3,具体表示为:SSB1、SSB2和SSB3(在实际应用中也可以用0-2编号,并具体表示为:SSB0、SSB1和SSB2)。
以及假设一个时间点上有4个RO资源在进行FDM,图4中,T表示一个PRACH资源配置周期,一个格子代表一个RO资源,具有不同填充图案的格子代表与不同的SSB关联的RO资源, 格子的行数代表一个时间点上的RO资源数量,格子的列数代表时间点数。其中,网络设备实际发送的SSB的数量小于或等于网络设备可发送的SSB的数量。
图4中所示意的情况是:一个RO资源关联1/8个SSB,当一个RO资源关联1/4、1/2…各SSB等其余可能的情况是,其实现方式可以进行对应的扩展,此处不再赘述。
在另一种可能的实现方式中,RO资源还可以与信道状态参考信号(Channel StateInformation-Reference Signals,CSI-RS)存在关联关系,其实现方式与上述介绍的类似,此处不再赘述。
在本实施例中,介绍了RO资源与SSB或者与CSI-RS之间的关联关系,除此之外,要利用RO进行随机接入过程,还需要确定RO所对应的频率,其中,随机接入过程时,RO是在初始上行BWP中配置的。
下面结合图3对配置RO的实现方式进行介绍,图3为本申请实施例提供的RO的配置示意图,如图3所示:
在实现过程中,系统可以配置在频率域上FDM复用的RO个数,假设复用的RO个数为4,则如图3所示,一个时间点上对应有4个RO,其中,第一个RO的频率起点是相对初始上行BWP的第一个PRB(PRB0)配置的,例如可以配置第一个RO的频率起点是相对于PRB0的第二偏置的频率位置,在一种可能的实现方式中,第二偏置可以为msg1-frequencystart个PRB,也就是说,第一个RO的频率起点相对PRB0偏置msg1-frequencystart个PRB。
在可能的实现方式中,网络设备还可以系统广播消息通知终端设备PRACH所占用的时隙,PRACH在时隙内的占用符号,以及PRACH格式(format)等。
其中,每一个RO所占用的带宽具体为多少,可以由PRACH的format所确定,也就是说,每一个PRACH format对应各自的RO所占用的带宽,本实施例对此不做限制。
下面结合表1对部分preamble格式所对应的RO所占用的带宽进行介绍:
表1:
Figure PCTCN2020073335-appb-000001
以表1中的第一行为例首先对表格的含义进行说明:
在一种可能的实现方式下,某一preamble格式的序列长度可以为839,其对应的PRACH的子载波间隔为1.25KHz,因为1.25KHz的表达方式不常用,可以采用常用的PUSCH的子载波间隔表示当前preamble格式所占用的带宽,例如以15KHz的PUSCH子载波间隔表示带宽,对应的当前RO所对应的PUSCH的PRB为6个,其中,一个PRB包括12个子载波,也就是说,在这种格式下,RO所对应的带宽就是15KHz×12×6=1080KHz。
基于上述介绍的表1的含义,参见表1中某几行,可以看出,第四行和第十行的preamble格式所对应的RO需要占用24个15KHz子载波间隔的PRB,则当前格式的RO所占用的带宽就是:15KHz×12×24=4329KHz=4.329MHz;
以及,第五行和第十一行的preamble格式所对应的RO需要占用12个30KHz子载波间隔的PRB,则当前格式的RO所占用的带宽就是:30KHz×12×12=4320KHz=4.32MHz。
因此,一个RO所占用的带宽就已经接近5MHz,基于上述对NR-light终端设备的介绍,可以确定的是,NR-light终端设备的带宽相对较窄,例如可以为5MHz或10MHz。
其中,一个RO所占用的带宽就已经接近5MHz,当系统在频域上配置1个以上FDM的这样的RO时,显然会超过5MHz的终端设备的带宽;当系统在频域上配置2个以上FDM的这样的RO时,显然会超过10MHz的终端设备的带宽。
但另一方面,基于上述的介绍可以确定的是,所有的RO都需要在初始上行BWP内配置,因此,在这种情况下,可能出现网络设备配置的初始上行BWP的带宽大于终端设备的终端带宽的情况。
当网络设备配置的初始上行BWP的带宽大于终端设备的带宽时,终端设备无法在终端带宽下进行正常的上行数据传输,则会导致上行数据传输异常。
针对现有技术中的问题,本申请提出了如下技术构思:不采用网络设备的配置确定初始上行BWP,而是基于终端设备发送PRACH所占用的频带确定初始上行BWP。
在介绍本申请所提供的通信方法之前,因为本申请所涉及的通信场景可以是终端设备进行随机接入过程,从而发送PRACH,基于此,首先对随机接入过程进行简单的说明,以便于对本申请所提供的的方案进行更加详细的介绍:
随机接入可以包括四步随机接入(还可以称为四步随机接入信道,或者,还可以简称为4-step RACH、竞争随机接入)和两步随机接入(还可以称为两步随机接入信道,或者还可以简称为2-step RACH、非竞争随机接入),而本申请实施例所涉及的随机接入主要是两步随机接入,为了便于理解,下面,分别对4-step RACH和2-step RACH的过程进行详细说明。
图5为本申请实施例提供的4-step RACH的流程示意图。4-step RACH在现有的协议TS38.300中已经详细定义,本申请只是简单进行了描述。请参见图4,该方法可以包括:
S501、终端设备向网络设备发送Msg1。
Msg1还可以称为msg1、或MSG1。
Msg1用于传输随机接入前导,随机接入前导还可以称为随机接入前导序列、或preamble、或preamble序列。
在本申请实施例中,preamble以及发送preamble所占用的时频资源称作为物理随机接入信道(physical random access channel,PRACH)资源。
可选的,终端设备可以选择PRACH资源、以及选取一个preamble,并在选择的PRACH资源上发送选取的preamble。若随机接入的方式为基于非竞争的随机接入,则可以由基站指定PRACH资源和preamble,基站可以基于终端设备发送的preamble估计定时提前量(timing advance,TA)、以及终端设备传输Msg3所需的上行授权大小。
例如,网络设备可以通过系统信息广播可用的PRACH资源。
S502、网络设备向终端设备发送Msg2。
Msg2还可以称为msg2、或MSG2。
其中,Msg2包含了网络设备确定给终端设备用于发送净荷(payload)所使用的时频资源。
终端设备发送Msg1之后,可以开启一个随机接入响应时间窗(ra-Response Window),在该随机接入响应时间窗内监测随机接入无线网络临时标识(random access radio network temporary identifier,RA-RNTI)加扰的物理下行控制信道(physical downlink control channel,PDCCH)。
其中,RA-RNTI与终端设备发送Msg1所使用的PRACH时频资源有关。
在终端设备成功接收到RA-RNTI加扰的PDCCH之后,终端设备能够获得该PDCCH调度的物理下行共享信道(physical downlink shared channel,PDSCH),其中包含了随机接入响应(random access response,RAR)。其中,RAR中可以包括如下信息:
RAR的子头中包含回退指示(back-off indicator,BI),用于指示重传Msg1的回退时间。
RAR中的RAPID:网络响应收到的preamble index。
RAR的净荷(payload)中包含定时提前组(timing advance group,TAG),用于调整上行定时。
上行(up link,UL)grant:用于调度Msg3的上行资源指示。
临时(temporary)小区无线网络临时标识(cell radio network temporary identifier,C-RNTI):用于加扰Msg4的PDCCH。
如果终端接收到RAR-RNTI加扰的PDCCH,并且RAR中包含了自己发送的preamble index,则终端认为成功接收了随机接入响应。
对于基于非竞争的随机接入,终端成功接收Msg2后,随机接入过程结束。对于基于竞争的随机接入,终端设备成功接收Msg2后,还需要继续传输Msg3和接收Msg4。
S503、终端设备向网络设备发送Msg3。
Msg3还可以称为msg3、或MSG3。
其中,Msg3是随机接入过程中的第一个调度传输,发送净荷(payload),例如,RRC连接请求消息、跟踪区域更新消息等。
Msg3可以通知网络设备该RACH过程是由什么事件触发。例如,如果是初始接入随机过程,则在Msg3中会携带UE ID和成立原因(establishment cause);如果是RRC重建,则会携带连接态UE标示和成立原因(establishment cause)。
需要说明的是,若不同的终端设备在S301中选择了相同的preamble并且在相同的时频资源上发送该preamble,则该不同的终端设备在相同的时频资源上发送净荷,进而导致资源使用冲突。
S504、网络设备向终端设备发送Msg4。
Msg4还可以称为msg4、或MSG4。
其中,Msg4用于指示该终端设备是否成功的接入到该网络设备。
Msg4可以具有如下两个作用:一个是解决竞争冲突。另一个是网络设备向终端设备传输RRC配置消息。竞争冲突解决有以下两种方式:一种是如果终端设备在Msg3中携带了C-RNTI,则Msg4用C-RNTI加扰的PDCCH调度。另一种是如果终端设备在Msg3中未携带C-RNTI,比如是初始接入,则Msg4用TC-RNTI加扰的PDCCH调度,冲突的解决是终端设备接收Msg4的PDSCH,通过匹配PDSCH中的公共控制信道(common control channel,CCCH)服务数据单元(service data unit,SDU)。
图6为本申请实施例提供的2-step RACH的流程示意图。请参见图6,该方法可以包括:
S601、终端设备向网络设备发送MsgA。
MsgA还可以称为msgA、或MSGA。
其中,msgA包含有preamble以及净荷(例如,RRC连接请求消息、跟踪区域更新消息等)。
S602、网络设备向终端设备发送msgB。
msgB还可以称为MsgB、或MSGB,用于指示该终端设备是否成功的接入到该网络设备。
从以上随机接入的过程可以看出,随机接入的主要目的就是终端设备与网络设备(小区)取得上行同步。
在上述介绍的内容的基础上,下面通过具体实施例,对本申请所示的技术方案进行详细说明。需要说明的是,下面几个实施例可以独立存在,也可以相互结合,对于相同或相似的内容,在不同的实施例中不再重复说明。
下面结合图7对本申请实施例提供的终端设备侧的通信方法进行详细介绍,图7为本申请实施例提供的通信方法的流程图一。
如图7所示,该方法包括:
S701、根据第一随机接入信道时机RO所对应的第一带宽信息,确定初始上行带宽部分BWP。
在本实施例中,第一RO在传输的过程中,占用了时域资源和频域资源,从频域资源的层面来说,第一RO对应有第一带宽信息,其中,第一带宽信息用于指示第一RO所对应的频率范围。
在一种可能的实现方式中,第一带宽信息例如可以包括带宽;或者,还可以包括频率位置;或者,还可以包括子载波宽度等,本实施例对第一带宽信息的具体实现方式不做特别限制,其可以根据实际需求进行选择,凡是用于指示第一RO所对应的频率范围的信息均可以作为本实施例中的第一带宽信息。
在本实施例中,根据第一带宽信息确定初始上行带宽部分BWP,其中,初始上行BWP用于在网络设备为终端设备配置上行BWP之前,向网络设备发送上行数据。
基于上述介绍可以确定的是,单独的一个RO所占用的带宽可能比较接近终端设备的终端带宽,但是并未超过终端设备的终端带宽,因此基于第一RO的第一带宽信息确定初始上行BWP,可以有效保证初始上行BWP不会超过终端设备的终端带宽,从而保证了终端设备能够进行正常的上行数据传输。
此处对确定第一RO的可能的实现方式进行说明:
在一种可能的实现方式中,终端设备在发送PRACH之前,会基于下行参考信号,如SS/PBCH block或CSI-RS进行信道质量的测量,从而选择参考信号接收功率(reference signal receiving power,RSRP)较好(如大于特定的门限)的SS/PBCH或CSI-RS对应的RO,其中,SS/PBCH block 与RO的关联关系以及CSI-RS与RO的关联关系在上述实施例中已经进行了介绍,此处不再赘述。
基于上述介绍,本领域技术人员可以确定的是,一个SS/PBCH block可以对应至少一个RO,以及一个CSI-RS也可以对应至少一个RO,则终端设备在确定SS/PBCH或CSI-RS对应的RO时,在一种可能的实现方式中,终端设备可以在SS/PBCH或CSI-RS对应的多个RO中随机选择一个RO。
在确定RO之后,一个RO中可以对应有多个preamble索引,终端设备可以在RO中选择某一preamble索引,在一种可能的实现方式中,终端设备可以在多个preamble索引中随机选择一个preamble索引,接着终端设备在选择的RO中向网络设备发送preamble,其中,不同的波束对应不同的SS/PBCH block或CSI-RS,因此,终端设备发送PRACH所使用的RO与终端设备所在的波束位置相关,这也意味着不同的终端发送PRACH的RO可能不同。
以及本领域技术人员可以理解的是,PRACH的传输可能会不出现不成功的情况,因此终端设备可能需要进行PRACH的重传,则对应的,终端设备可能需要多次发送PRACH,才可以完成随机接入过程,而每一次发送PRACH,终端设备都可能改变发送PRACH的RO。
上述的终端设备可能改变发送PRACH的RO可能存在如下情况:
在一种可能的情况下,若一个SS/PBCH block对应至少两个RO,或者一个CSI-RS对应至少两个RO,则终端设备可以在SS/PBCH block或者CSI-RS对应的至少两个RO中随机选择一个RO,此时终端设备可能改变发送PRACH的RO;
在另一种可能的情况下,若一个SS/PBCH block对应一个RO,或者一个CSI-RS对应一个RO,则终端设备仅可以选择SS/PBCH block或者CSI-RS对应的这一个RO,也就是说,此时终端设备不改变发送PRACH的RO。
在实际实现过程中,RO的选择是根据实际情况进行选择的,选择的依据也就是上述介绍的内容,本实施例对此不做限制。
因此在一种可能的实现方式中,本实施例中的第一RO可以为多个RO中满足第一预设条件的PRACH所对应的RO,其中,第一预设条件可以包括如下中的至少一种:终端设备在第一RO中发送PRACH之后,终端设备接收到随机接入响应(Random Access Response,RAR)、终端设备在第一RO中发送PRACH之后,终端设备接收到消息msg4响应、终端设备在第一RO中发送PRACH之后,终端设备完成随机接入过程。。
也就是说,在一种可能的实现方式中,终端设备可以基于最后一次成功发送的PRACH所占的RO确定第一RO,其中成功发送的PRACH指的:针对该次PRACH的发送,终端设备收到了来自网络设备的RAR响应;或者,收到了msg4响应;或者,终端设备完成了随机接入过程。
通过将满足第一预设条件的RO确定为第一RO,可以保证按照当前的第一RO对应的带宽信息确定初始上行BWP的准确性和稳定性,以避免后续RO发生变化,导致初始上行BWP也要随之发生变化。
本申请实施例提供的通信方法,包括:根据第一随机接入信道时机RO所对应的第一带宽信息,确定初始上行带宽部分BWP。通过根据第一RO所对应的第一带宽信息确定初始上行BWP,能够有效保证初始上行BWP不会超过终端设备的终端带宽,从而保证了终端设备能够进行正常的上行数据传输。
在上述实施例的基础上,下面结合具体的实施例对根据第一带宽信息确定初始上行BWP的几种可能的实现方式进行说明,结合图8-图11进行介绍,图8为本申请实施例提供的初始上行BWP的配置示意图一,图9为本申请实施例提供的初始上行BWP的配置示意图二,图10为本申请实施例提供的初始上行BWP的配置示意图三,图11为本申请实施例提供的初始上行BWP的配置示意图四:
参见图8,在一种可能的实现方式中:
第一带宽信息包括第一带宽和/或第一频率位置。
则可以根据第一带宽,确定初始上行BWP的第二带宽;和/或
根据第一频率位置,确定初始上行BWP的第二频率位置。
其中,第二带宽和第一带宽相同;第一频率位置和第二频率位置相同。
也就是说,可以将第一RO的带宽确定为初始上行BWP的带宽,和/或,将第一RO所占用频率位置确定为初始上行BWP的频率位置。
下面结合图8对将第一RO的带宽以及第一RO所占用频率位置确定为初始上行BWP的带宽以及频率位置的实现方式进行说明,其余的实现方式类似,此处不再赘述:
参见图8,假设NR light终端设备选择了RO2作为发送PRACH的RO,并且RO2满足第一预设条件,则将RO2所占用的第一带宽以及占用的第一频率位置确定为初始上行BWP的第二带宽以及第二频率位置。
在本实施例中,第一频率位置和第二频率位置可以包括频率起始位置和/或频率结束位置和/或频率中心频点。
参见图9,在另一种可能的实现方式中:
第一带宽信息包括第一频率起点位置。
则可以根据第一频率起点位置,确定初始上行BWP的第二频率起点位置。
其中,第一频率起点位置和第二频率起点位置相同。
也就是说,将第一RO的占用频率的起点位置确定为初始上行BWP的占用频率的起点位置。
参见图9,假设NR light终端设备选择了RO2作为发送PRACH的RO,并且RO2满足第一预设条件,则将RO2所占用频率的第一频率起点位置为确定为初始上行BWP的第二频率起点位置。
在可能的实现方式中,NR light终端设备的使用的初始上行BWP的带宽、子载波间隔等其他参数可以由网络设备发送的系统广播消息进行指示,则可以接收来自网络设备的系统广播消息,以根据系统广播消息确定初始上行BWP的第二带宽以及初始上行BWP的子载波简则。
其中,根据第二频率起点位置、带宽就可以确定初始上行BWP。
参见图10,在再一种可能的实现方式中:
第一带宽信息包括第一频率终点位置。
则可以根据第一频率终点位置,确定初始上行BWP的第二频率终点位置。
其中,第二频率终点位置和第一频率终点位置相同。
也就是说,将第一RO的占用频率的终点位置确定为初始上行BWP的频率的终点位置。
参见图10,假设NR light终端选择了RO2作为发送PRACH的RO,并且RO2满足第一预设条件,则将RO2所占用频率的第一频率终点位置确定为初始上行BWP的第二频率终点位置。
在可能的实现方式中,NR light终端设备的使用的初始上行BWP的带宽、子载波间隔等其他参数可以由网络设备发送的系统广播消息进行指示,则可以接收来自网络设备的系统广播消息,以根据系统广播消息确定初始上行BWP的第二带宽以及初始上行BWP的子载波简则。
其中,根据第二频率终点位置、带宽就可以确定初始上行BWP。
参加图11,在又一种可能的实现方式中:
第一带宽信息包括第一频率中心频点。
则可以根据第一频率中心频点,确定初始上行BWP的第二频率中心频点。
其中,第一频率中心频点和第二频率中心频点相同。
也就是说,第一RO的占用频率的中心频点确定为初始上行BWP的频率中心频点。
参加图11,假设NR light终端设备选择了RO2作为发送PRACH的RO,并且RO2满足第一预设条件,则将RO2所占用频率的第一频率中心频点为确定为初始上行BWP的频率位置的第二频率中心频点。
在可能的实现方式中,NR light终端设备的使用的初始上行BWP的带宽、子载波间隔等其他参数可以由网络设备发送的系统广播消息进行指示,则可以接收来自网络设备的系统广播消息,以根据系统广播消息确定初始上行BWP的第二带宽以及初始上行BWP的子载波简则。
其中,根据第二频率中心频点、带宽就可以确定初始上行BWP。
在上述实施例的基础上,在一种可能的实现方式中,尽管终端设备是基于发送PRACH的第一RO确定初始上行BWP,但是网络设备依然会通过系统广播消息为终端设备配置初始上行BWP,本实施例中将网络设备配置的初始上行BWP称作第二初始上行BWP,以和上述实施例介绍的初始上行BWP进行区分,值得说明的是,网络设备虽然会进行配置,但是终端设备并不会基于此配置确定。
但是此处需要说明的是,尽管终端设备不会采用网络设备的配置确定初始上行BWP,但是终端设备在确定RO的配置信息时,依然可以根据网络设备配置的第二初始上行BWP进行确定,具体的确定方式可以参照上述图3实施例中的说明,此处不再赘述。
通过根据网络设备配置的第二初始上行BWP,确定RO的配置信息,可以在现有的RO的配置机制下,实现根据第一RO确定初始上行BWP,从而在无需改变信令的基础上,实现本申请的技术方案,以实现终端设备之间的兼容,以及实现不同的终端设备之间进行RO的共享。
在上述实施例的基础上,终端设备确定通过第一RO发送PRACH,以及,在初始接入过程中,后续的上行数据传输也可以在第一RO所对应的频带上进行传输,以使得终端设备在发送PRACH与后续的上行数据传输之间不用切换传输频率,基于此,本领域技术人员可以确定的是,网络设备同样需要确定终端设发送上行数据的初始上行BWP,以便进行数据的接收,下面结合图12对网络设备侧的通信方法进行介绍。
图12为本申请实施例提供的通信方法的流程图二。
如图12所示,该方法包括:
S1201、接收来自于终端设备的物理随机接入信道PRACH。
在随机接入过程中,终端设备会向网络设备发送PRACH,因此网络设备可以接收终端设备发送的PRACH。
S1202、根据PRACH对应的第一随机接入信道时机RO,确定终端设备对应的初始上行带宽部分BWP,其中,初始上行BWP是根据第一RO所对应的第一带宽信息确定的。
在本实施例中,PRACH对应有第一RO,可以理解的是,第一RO为满足第二预设条件的、发送上述PRACH的RO,第一RO的具体实现方式与上述实施例中介绍的内容相似,唯一的不同之处在于,本实施例中的第一RO需要满足的是第二预设条件,其中,第二预设条件和第一预设条件存在一些不同。
下面对第二预设条件进行说明,其中,第二预设条件包括如下中的至少一种:在第一RO中接收来自终端设备的PRACH、在第一RO中接收来自终端设备的消息msg3响应,其中,msg3响应是PRACH对应的响应消息。
基于上述介绍的随机接入过程,本领域技术人员可以确定的是,终端设备首先会向网络设备发送PRACH,若网络设备成功接收到来自终端设备的PRACH,则此时网络设备就可以确定终端设备发送上行数据所对应的RO了,此时也就可以确定第一RO了;或者,网络设备在接收到来自终端设备的msg3响应时,可以确定第一RO。
以网络设备接收到来自终端设备的PRACH为例,此处想要强调的是,在第一预设条件中,终端设备还需要接收到网络设备所发送的RAR,才可能能够确定第一RO,然而,网络设备在向终端设备发送RAR之前,就可以确定第一RO了,也就是说,网络设备和终端设备所确定的第一RO是相同的,只是两者确定的时间存在一些不同。
在一种可能的实现方式中,若网络设备接收到来自终端设备的PRACH,并确定了PRACH对应的第一RO,然后网络设备会向终端设备发送RAR,可能出现终端设备没有接收到RAR的情况,在这种情况下,终端设备没有接收到RAR,会认为随机接入失败,可能会重新发送PRACH,因此,终端设备和网络设备所确定的第一RO肯定是相同的。
在本实施例中,可以根据PRACH对应的第一RO确定终端设备对应的初始上行BWP,其中,终端设备对应的初始上行BWP是根据第一RO所对应的第一带宽信息确定的,具体的实现可以参照上述实施例中的介绍,此处不再赘述。
本申请实施例提供的通信方法,包括:接收来自于终端设备的物理随机接入信道PRACH。根据PRACH对应的第一随机接入信道时机RO,确定终端设备对应的初始上行带宽部分BWP,其中,初始上行BWP是根据第一RO所对应的第一带宽信息确定的。通过根据第一RO所对应的第一带宽信息确定初始上行BWP,能够有效保证初始上行BWP不会超过终端设备的终端带宽,从而保证了终端设备能够进行正常的上行数据传输。
在上述根据第一RO的第一带宽信息确定初始上行BWP的同时,在另一种可能的实现方式下,某些RO所占用的频率带宽仅有6个15KHz的PRB,则此时NR light终端设备的带宽可能不再是上行数据传输的瓶颈,也就是说,在这种情况下,终端设备根据网络设备配置的第二初始上行BWP进行上行数据传输,是可以正常进行的。
在这种情况下,NR-light终端设备可以基于网络设备配置系统广播信息确定第二初始上行BWP。
然而,若是网络设备未向NR-light终端配置初始上行BWP(例如终端设备未在系统广播消息中收到第二初始上行BWP的配置信息),则可以采用上述介绍的根据第一RO的第一带宽信息确定初始上行BWP。
综上所述,当终端设备接收到第二初始上行BWP的配置信息,并且第二初始上行BWP不大于终端设备的终端带宽时,可以采用网络设备配置的第二初始上行BWP的配置信息确定第二初始上行BWP;
当终端设备未接收到第二初始上行BWP的配置信息,或者第二初始上行BWP大于终端设备的终端带宽时,可以采用第一RO对应的第一带宽信息确定初始上行BWP。
在实际实现过程中,可以根据实际情况在上述两种方式中进行选择,本实施例对此不做特别限制。
图13为本申请实施例提供的通信装置的结构示意图一。请参见图13,该通信装置130可以包括确定模块1301以及接收模块1302,其中,
确定模块1301,用于根据第一随机接入信道时机RO所对应的第一带宽信息,确定初始上行带宽部分BWP。
在一种可能的实施方式中,所述第一带宽信息用于指示所述第一RO所对应的频率范围。
在一种可能的实施方式中,所述第一带宽信息包括第一带宽和/或第一频率位置。
在一种可能的实施方式中,所述确定模块1301具体用于:
根据所述第一带宽,确定所述初始上行BWP的第二带宽;和/或
根据所述第一频率位置,确定所述初始上行BWP的第二频率位置。
在一种可能的实施方式中,所述第二带宽和所述第一带宽相同;所述第一频率位置和所述第二频率位置相同。
在一种可能的实施方式中,所述第一带宽信息包括第一频率起点位置。
在一种可能的实施方式中,所述确定模块1301具体用于:根据所述第一频率起点位置,确定所述初始上行BWP的第二频率起点位置。
在一种可能的实施方式中,所述第一频率起点位置和所述第二频率起点位置相同。
在一种可能的实施方式中,所述第一带宽信息包括第一频率终点位置。
在一种可能的实施方式中,所述确定模块1301具体用于:
根据所述第一频率终点位置,确定所述初始上行BWP的第二频率终点位置。
在一种可能的实施方式中,所述第二频率终点位置和所述第一频率终点位置相同。
在一种可能的实施方式中,所述第一带宽信息包括第一频率中心频点。
在一种可能的实施方式中,所述确定模块1301具体用于:
根据所述第一频率中心频点,确定所述初始上行BWP的第二频率中心频点。
在一种可能的实施方式中,所述第一频率中心频点和所述第二频率中心频点相同。
在一种可能的实施方式中,还包括:接收模块1302;
所述接收模块1302具体用于,接收来自网络设备的系统广播消息,其中,所述系统广播消息用于指示所述初始上行BWP的第二带宽以及所述初始上行BWP的子载波间隔。
在一种可能的实施方式中,所述第一RO为多个RO中满足第一预设条件的RO。
在一种可能的实施方式中,所述第一预设条件包括如下中的至少一种:终端设备在所述第一RO中发送所述物理随机接入信道PRACH之后,终端设备接收到随机接入响应RAR、终端设备在所述第一RO中发送所述PRACH之后,终端设备接收到消息msg4响应、终端设备在所述第一RO中发送所述PRACH之后,终端设备完成随机接入过程。
在一种可能的实施方式中,所述接收模块1302还用于:
接收来自网络设备的第一配置信息,其中,所述第一配置信息用于指示所述多个RO所对应的带宽信息。
在一种可能的实施方式中,所述初始上行BWP用于在所述网络设备为所述终端设备配置上行BWP之前,向所述网络设备发送上行数据。
本申请实施例提供的通信装置可以执行上述方法实施例所示的技术方案,其实现原理以及有益效果类似,此处不再进行赘述。
图14为本申请实施例提供的通信装置的结构示意图二。请参见图14,该通信装置140可以包括收发模块1401以及确定模块1402,其中,
收发模块1401,用于接收来自于终端设备的物理随机接入信道PRACH;
确定模块1402,用于根据所述PRACH对应的第一随机接入信道时机RO,确定所述终端设备对应的初始上行带宽部分BWP,其中,所述初始上行BWP是根据第一RO所对应的第一带宽信息确定的。
在一种可能的实施方式中,所述第一带宽信息用于指示所述第一RO所对应的频率范围。
在一种可能的实施方式中,所述第一带宽信息包括第一带宽和/或第一频率位置。
在一种可能的实施方式中,所述初始上行BWP的第二带宽是根据所述第一带宽确定的;和/或
所述初始上行BWP的第二频率位置是根据所述第一频率位置确定的。
在一种可能的实施方式中,所述第二带宽和所述第一带宽相同;所述第一频率位置和所述第二频率位置相同。
在一种可能的实施方式中,所述第一带宽信息包括第一频率起点位置。
在一种可能的实施方式中,所述初始上行BWP的第二频率起点位置是根据所述第一频率起点位置确定的。
在一种可能的实施方式中,所述第一频率起点位置和所述第二频率起点位置相同。
在一种可能的实施方式中,所述第一带宽信息包括第一频率终点位置。
在一种可能的实施方式中,所述初始上行BWP的第二频率终点位置是根据所述所述第一频率终点位置确定的。
在一种可能的实施方式中,所述第二频率终点位置和所述第一频率终点位置相同。
在一种可能的实施方式中,所述第一带宽信息包括第一频率中心频点。
在一种可能的实施方式中,所述初始上行BWP的第二频率中心频点是根据所述第一频率中心频点确定的。
在一种可能的实施方式中,所述第一频率中心频点和所述第二频率中心频点相同。
在一种可能的实施方式中,所述收发模块1401还用于:
所述网络设备向所述终端设备发送的系统广播消息,其中,所述系统广播消息用于指示所述初始上行BWP的第二带宽以及所述初始上行BWP的子载波间隔。
在一种可能的实施方式中,所述第一RO为多个RO中满足第二预设条件的RO。
在一种可能的实施方式中,所述第二预设条件包括如下中的至少一种:在所述第一RO中接收来自所述终端设备的所述PRACH、在所述第一RO中接收来自所述终端设备的消息msg3响应,其中,所述msg3响应是所述PRACH对应的响应消息。
在一种可能的实施方式中,所述收发模块1401还用于:
所述网络设备向所述终端设备发送第一配置信息,其中,所述第一配置信息用于指示所述多个RO所对应的带宽信息。
在一种可能的实施方式中,所述初始上行BWP用于在所述网络设备为所述终端设备配置上行BWP之前,接收所述终端设备发送的上行数据。
本申请实施例提供的通信装置可以执行上述方法实施例所示的技术方案,其实现原理以及有益效果类似,此处不再进行赘述。
图15为本申请实施例提供的终端设备的结构示意图。请参见图15,终端设备20可以包括:收发器21、存储器22、处理器23。收发器21可包括:发射器和/或接收器。该发射器还可称为发送器、发射机、发送端口或发送接口等类似描述,接收器还可称为接收器、接收机、接收端口或接收接口等类似描述。示例性地,收发器21、存储器22、处理器23,各部分之间通过总线24相互连接。
存储器22用于存储程序指令;
处理器23用于执行该存储器所存储的程序指令,用以使得终端设备20执行上述任一所示的通信方法。
其中,收发器21的接收器,可用于执行上述通信方法中终端设备的接收功能。
图16为本申请实施例提供的网络设备的结构示意图。请参见图16,网络设备20可以包括:收发器31、存储器32、处理器33。收发器31可包括:发射器和/或接收器。该发射器还可称为发送器、发射机、发送端口或发送接口等类似描述,接收器还可称为接收器、接收机、接收端口或接收接口等类似描述。示例性地,收发器31、存储器32、处理器33,各部分之间通过总线34相互连接。
存储器32用于存储程序指令;
处理器33用于执行该存储器所存储的程序指令,用以使得终端设备20执行上述任一所示的通信方法。
其中,收发器31的接收器,可用于执行上述通信方法中终端设备的接收功能。
本申请实施例提供一种计算机可读存储介质,所述计算机可读存储介质中存储有计算机执行指令,当所述计算机执行指令被处理器执行时用于实现上述通信方法。
本申请实施例提供一种计算机可读存储介质,所述计算机可读存储介质中存储有计算机执行指令,当所述计算机执行指令被处理器执行时用于实现上述通信方法。
本申请实施例还可提供一种计算机程序产品,该计算机程序产品可以由处理器执行,在计算机程序产品被执行时,可实现上述任一所示的终端设备执行的通信方法。
本申请实施例的通信设备、计算机可读存储介质及计算机程序产品,可执行上述终端设备执行的通信方法,其具体的实现过程及有益效果参见上述,在此不再赘述。
在本申请所提供的几个实施例中,应该理解到,所揭露的系统,装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如,所述单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另一点,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口,装置或单元的间接耦合或通信连接,可以是电性,机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外,在本申请各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现,也可以采用软件功能单元的形式实现。
本领域普通技术人员可以理解:实现上述各方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成。前述的计算机程序可以存储于一计算机可读取存储介质中。该计算机程序在被处理器执行时,实现包括上述各方法实施例的步骤;而前述的存储介质包括:ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
最后应说明的是:以上各实施例仅用以说明本申请的技术方案,而非对其限制;尽管参照前述各实施例对本申请进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分或者全部技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本申请各实施例技术方案的范围。

Claims (80)

  1. 一种通信方法,其特征在于,应用于终端设备,包括:
    根据第一随机接入信道时机RO所对应的第一带宽信息,确定初始上行带宽部分BWP。
  2. 根据权利要求1所述的方法,其特征在于,所述第一带宽信息用于指示所述第一RO所对应的频率范围。
  3. 根据权利要求1-2任一项所述的方法,其特征在于,所述第一带宽信息包括第一带宽和/或第一频率位置。
  4. 根据权利要求1-3任一项所述的方法,其特征在于,所述根据第一随机接入信道时机RO所对应的第一带宽信息,确定初始上行带宽部分BWP,包括:
    根据所述第一带宽,确定所述初始上行BWP的第二带宽;和/或
    根据所述第一频率位置,确定所述初始上行BWP的第二频率位置。
  5. 根据权利要求4所述的方法,其特征在于,所述第二带宽和所述第一带宽相同;所述第一频率位置和所述第二频率位置相同。
  6. 根据权利要求1-2任一项所述的方法,其特征在于,所述第一带宽信息包括第一频率起点位置。
  7. 根据权利要求1-2、6任一项所述的方法,其特征在于,所述根据第一随机接入信道时机RO所对应的第一带宽信息,确定初始上行带宽部分BWP,包括:
    根据所述第一频率起点位置,确定所述初始上行BWP的第二频率起点位置。
  8. 根据权利要求7所述的方法,其特征在于,所述第一频率起点位置和所述第二频率起点位置相同。
  9. 根据权利要求1-2任一项所述的方法,其特征在于,所述第一带宽信息包括第一频率终点位置。
  10. 根据权利要求1-2、9任一项所述的方法,其特征在于,所述根据第一随机接入信道时机RO所对应的第一带宽信息,确定初始上行带宽部分BWP,包括:
    根据所述第一频率终点位置,确定所述初始上行BWP的第二频率终点位置。
  11. 根据权利要求10所述的方法,其特征在于,所述第二频率终点位置和所述第一频率终点位置相同。
  12. 根据权利要求1-2任一项所述的方法,其特征在于,所述第一带宽信息包括第一频率中心频点。
  13. 根据权利要求1-2、12任一项所述的方法,其特征在于,所述根据第一随机接入信道时机RO所对应的第一带宽信息,确定初始上行带宽部分BWP,包括:
    根据所述第一频率中心频点,确定所述初始上行BWP的第二频率中心频点。
  14. 根据权利要求13所述的方法,其特征在于,所述第一频率中心频点和所述第二频率中心频点相同。
  15. 根据权利要求6-14任一项所述的方法,其特征在于,所述方法还包括:
    接收来自网络设备的系统广播消息,其中,所述系统广播消息用于指示所述初始上行BWP的第二带宽以及所述初始上行BWP的子载波间隔。
  16. 根据权利要求1-15任一项所述的方法,其特征在于,所述第一RO为多个RO中满足第一预设条件的RO。
  17. 根据权利要求16所述的方法,其特征在于,所述第一预设条件包括如下中的至少一种:终端设备在所述第一RO中发送所述物理随机接入信道PRACH之后,终端设备接收到随机接入响应RAR、终端设备在所述第一RO中发送所述PRACH之后,终端设备接收到消息msg4响应、终端设备在所述第一RO中发送所述PRACH之后,终端设备完成随机接入过程。
  18. 根据权利要求1-17任一项所述的方法,其特征在于,所述方法还包括:
    接收来自网络设备的第一配置信息,其中,所述第一配置信息用于指示所述多个RO所对应的带宽信息。
  19. 根据权利要求1-18任一项所述的方法,其特征在于,所述初始上行BWP用于在所述网络设备为所述终端设备配置上行BWP之前,向所述网络设备发送上行数据。
  20. 一种通信方法,其特征在于,应用于网络设备,包括:
    接收来自于终端设备的物理随机接入信道PRACH;
    根据所述PRACH对应的第一随机接入信道时机RO,确定所述终端设备对应的初始上行带宽 部分BWP,其中,所述初始上行BWP是根据第一RO所对应的第一带宽信息确定的。
  21. 根据权利要求20所述的方法,其特征在于,所述第一带宽信息用于指示所述第一RO所对应的频率范围。
  22. 根据权利要求20-21任一项所述的方法,其特征在于,所述第一带宽信息包括第一带宽和/或第一频率位置。
  23. 根据权利要求20-22任一项所述的方法,其特征在于,所述初始上行BWP的第二带宽是根据所述第一带宽确定的;和/或
    所述初始上行BWP的第二频率位置是根据所述第一频率位置确定的。
  24. 根据权利要求23所述的方法,其特征在于,所述第二带宽和所述第一带宽相同;所述第一频率位置和所述第二频率位置相同。
  25. 根据权利要求20-21任一项所述的方法,其特征在于,所述第一带宽信息包括第一频率起点位置。
  26. 根据权利要求20-21、25任一项所述的方法,其特征在于,所述初始上行BWP的第二频率起点位置是根据所述第一频率起点位置确定的。
  27. 根据权利要求26所述的方法,其特征在于,所述第一频率起点位置和所述第二频率起点位置相同。
  28. 根据权利要求20-21任一项所述的方法,其特征在于,所述第一带宽信息包括第一频率终点位置。
  29. 根据权利要求20-21、28任一项所述的方法,其特征在于,所述初始上行BWP的第二频率终点位置是根据所述所述第一频率终点位置确定的。
  30. 根据权利要求29所述的方法,其特征在于,所述第二频率终点位置和所述第一频率终点位置相同。
  31. 根据权利要求20-21任一项所述的方法,其特征在于,所述第一带宽信息包括第一频率中心频点。
  32. 根据权利要求20-21、31任一项所述的方法,其特征在于,所述初始上行BWP的第二频率中心频点是根据所述第一频率中心频点确定的。
  33. 根据权利要求32所述的方法,其特征在于,所述第一频率中心频点和所述第二频率中心频点相同。
  34. 根据权利要求25-33任一项所述的方法,其特征在于,所述方法还包括:
    所述网络设备向所述终端设备发送的系统广播消息,其中,所述系统广播消息用于指示所述初始上行BWP的第二带宽以及所述初始上行BWP的子载波间隔。
  35. 根据权利要求20-34任一项所述的方法,其特征在于,所述第一RO为多个RO中满足第二预设条件的RO。
  36. 根据权利要求35所述的方法,其特征在于,所述第二预设条件包括如下中的至少一种:在所述第一RO中接收来自所述终端设备的所述PRACH、在所述第一RO中接收来自所述终端设备的消息msg3响应,其中,所述msg3响应是所述PRACH对应的响应消息。
  37. 根据权利要求20-36任一项所述的方法,其特征在于,所述方法还包括:
    所述网络设备向所述终端设备发送第一配置信息,其中,所述第一配置信息用于指示所述多个RO所对应的带宽信息。
  38. 根据权利要求20-37任一项所述的方法,其特征在于,所述初始上行BWP用于在所述网络设备为所述终端设备配置上行BWP之前,接收所述终端设备发送的上行数据。
  39. 一种通信装置,其特征在于,应用于终端设备,包括:
    确定模块,用于根据第一随机接入信道时机RO所对应的第一带宽信息,确定初始上行带宽部分BWP。
  40. 根据权利要求39所述的装置,其特征在于,所述第一带宽信息用于指示所述第一RO所对应的频率范围。
  41. 根据权利要求39-40任一项所述的装置,其特征在于,所述第一带宽信息包括第一带宽和/或第一频率位置。
  42. 根据权利要求39-41任一项所述的装置,其特征在于,所述确定模块具体用于:
    根据所述第一带宽,确定所述初始上行BWP的第二带宽;和/或
    根据所述第一频率位置,确定所述初始上行BWP的第二频率位置。
  43. 根据权利要求42所述的装置,其特征在于,所述第二带宽和所述第一带宽相同;所述第一频率位置和所述第二频率位置相同。
  44. 根据权利要求39-40任一项所述的装置,其特征在于,所述第一带宽信息包括第一频率起点位置。
  45. 根据权利要求39-40、44任一项所述的装置,其特征在于,所述确定模块具体用于:根据所述第一频率起点位置,确定所述初始上行BWP的第二频率起点位置。
  46. 根据权利要求45所述的装置,其特征在于,所述第一频率起点位置和所述第二频率起点位置相同。
  47. 根据权利要求39-40任一项所述的装置,其特征在于,所述第一带宽信息包括第一频率终点位置。
  48. 根据权利要求39-40、47任一项所述的装置,其特征在于,所述确定模块具体用于:
    根据所述第一频率终点位置,确定所述初始上行BWP的第二频率终点位置。
  49. 根据权利要求48所述的装置,其特征在于,所述第二频率终点位置和所述第一频率终点位置相同。
  50. 根据权利要求39-40任一项所述的装置,其特征在于,所述第一带宽信息包括第一频率中心频点。
  51. 根据权利要求39-40、50任一项所述的装置,其特征在于,所述确定模块具体用于:
    根据所述第一频率中心频点,确定所述初始上行BWP的第二频率中心频点。
  52. 根据权利要求51所述的装置,其特征在于,所述第一频率中心频点和所述第二频率中心频点相同。
  53. 根据权利要求44-52任一项所述的装置,其特征在于,还包括:接收模块;
    所述接收模块具体用于,接收来自网络设备的系统广播消息,其中,所述系统广播消息用于指示所述初始上行BWP的第二带宽以及所述初始上行BWP的子载波间隔。
  54. 根据权利要求39-53任一项所述的装置,其特征在于,所述第一RO为多个RO中满足第一预设条件的RO。
  55. 根据权利要求54所述的装置,其特征在于,所述第一预设条件包括如下中的至少一种:终端设备在所述第一RO中发送所述物理随机接入信道PRACH之后,终端设备接收到随机接入响应RAR、终端设备在所述第一RO中发送所述PRACH之后,终端设备接收到消息msg4响应、终端设备在所述第一RO中发送所述PRACH之后,终端设备完成随机接入过程。
  56. 根据权利要求39-55任一项所述的装置,其特征在于,所述接收模块还用于:
    接收来自网络设备的第一配置信息,其中,所述第一配置信息用于指示所述多个RO所对应的带宽信息。
  57. 根据权利要求39-56任一项所述的装置,其特征在于,所述初始上行BWP用于在所述网络设备为所述终端设备配置上行BWP之前,向所述网络设备发送上行数据。
  58. 一种通信装置,其特征在于,应用于网络设备,包括:
    收发模块,用于接收来自于终端设备的物理随机接入信道PRACH;
    确定模块,用于根据所述PRACH对应的第一随机接入信道时机RO,确定所述终端设备对应的初始上行带宽部分BWP,其中,所述初始上行BWP是根据第一RO所对应的第一带宽信息确定的。
  59. 根据权利要求58所述的装置,其特征在于,所述第一带宽信息用于指示所述第一RO所对应的频率范围。
  60. 根据权利要求58-59任一项所述的装置,其特征在于,所述第一带宽信息包括第一带宽和/或第一频率位置。
  61. 根据权利要求58-60任一项所述的装置,其特征在于,所述初始上行BWP的第二带宽是根据所述第一带宽确定的;和/或
    所述初始上行BWP的第二频率位置是根据所述第一频率位置确定的。
  62. 根据权利要求61所述的装置,其特征在于,所述第二带宽和所述第一带宽相同;所述第一频率位置和所述第二频率位置相同。
  63. 根据权利要求58-59任一项所述的装置,其特征在于,所述第一带宽信息包括第一频率起点位置。
  64. 根据权利要求58-59、63任一项所述的装置,其特征在于,所述初始上行BWP的第二频 率起点位置是根据所述第一频率起点位置确定的。
  65. 根据权利要求64所述的装置,其特征在于,所述第一频率起点位置和所述第二频率起点位置相同。
  66. 根据权利要求58-59任一项所述的装置,其特征在于,所述第一带宽信息包括第一频率终点位置。
  67. 根据权利要求58-59、66任一项所述的装置,其特征在于,所述初始上行BWP的第二频率终点位置是根据所述所述第一频率终点位置确定的。
  68. 根据权利要求67所述的装置,其特征在于,所述第二频率终点位置和所述第一频率终点位置相同。
  69. 根据权利要求58-59任一项所述的装置,其特征在于,所述第一带宽信息包括第一频率中心频点。
  70. 根据权利要求58-59、69任一项所述的装置,其特征在于,所述初始上行BWP的第二频率中心频点是根据所述第一频率中心频点确定的。
  71. 根据权利要求70所述的装置,其特征在于,所述第一频率中心频点和所述第二频率中心频点相同。
  72. 根据权利要求63-71任一项所述的装置,其特征在于,所述收发模块还用于:
    所述网络设备向所述终端设备发送的系统广播消息,其中,所述系统广播消息用于指示所述初始上行BWP的第二带宽以及所述初始上行BWP的子载波间隔。
  73. 根据权利要求58-72任一项所述的装置,其特征在于,所述第一RO为多个RO中满足第二预设条件的RO。
  74. 根据权利要求73所述的装置,其特征在于,所述第二预设条件包括如下中的至少一种:在所述第一RO中接收来自所述终端设备的所述PRACH、在所述第一RO中接收来自所述终端设备的消息msg3响应,其中,所述msg3响应是所述PRACH对应的响应消息。
  75. 根据权利要求58-74任一项所述的装置,其特征在于,所述收发模块还用于:
    所述网络设备向所述终端设备发送第一配置信息,其中,所述第一配置信息用于指示所述多个RO所对应的带宽信息。
  76. 根据权利要求58-75任一项所述的装置,其特征在于,所述初始上行BWP用于在所述网络设备为所述终端设备配置上行BWP之前,接收所述终端设备发送的上行数据。
  77. 一种终端设备,其特征在于,包括:收发器、处理器、存储器;
    所述存储器存储计算机执行指令;
    所述处理器执行所述存储器存储的计算机执行指令,使得所述处理器执行如权利要求1至19任一项所述的通信方法。
  78. 一种网络设备,其特征在于,包括:收发器、处理器、存储器;
    所述存储器存储计算机执行指令;
    所述处理器执行所述存储器存储的计算机执行指令,使得所述处理器执行如权利要求20至38任一项所述的通信方法。
  79. 一种计算机可读存储介质,其特征在于,所述计算机可读存储介质中存储有计算机执行指令,当所述计算机执行指令被处理器执行时用于实现如权利要求1至19任一项所述的通信方法。
  80. 一种计算机可读存储介质,其特征在于,所述计算机可读存储介质中存储有计算机执行指令,当所述计算机执行指令被处理器执行时用于实现如权利要求20至38任一项所述的通信方法。
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