WO2021120126A1 - 无线通信方法、终端设备和网络设备 - Google Patents

无线通信方法、终端设备和网络设备 Download PDF

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Publication number
WO2021120126A1
WO2021120126A1 PCT/CN2019/126733 CN2019126733W WO2021120126A1 WO 2021120126 A1 WO2021120126 A1 WO 2021120126A1 CN 2019126733 W CN2019126733 W CN 2019126733W WO 2021120126 A1 WO2021120126 A1 WO 2021120126A1
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WIPO (PCT)
Prior art keywords
random access
step random
terminal device
message
preamble group
Prior art date
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PCT/CN2019/126733
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English (en)
French (fr)
Inventor
林雪
石聪
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 CN201980100537.6A priority Critical patent/CN114503770A/zh
Priority to EP19956701.7A priority patent/EP4025002A4/en
Priority to PCT/CN2019/126733 priority patent/WO2021120126A1/zh
Priority to CN202311467342.XA priority patent/CN117580188A/zh
Publication of WO2021120126A1 publication Critical patent/WO2021120126A1/zh
Priority to US17/707,864 priority patent/US20220225433A1/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
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA
    • H04W74/0833Random access procedures, e.g. with 4-step access
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0006Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
    • H04L1/0007Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format by modifying the frame length
    • 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
    • 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
    • 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
    • H04W74/002Transmission of channel access control information

Definitions

  • the embodiments of the present application relate to the communication field, and more specifically, to a wireless communication method, terminal device, and network device.
  • two-step random access can be supported.
  • the first message (Message 1, Msg 1) and the third A message (Msg 3) is sent as the first message (Message A, Msg A) in the two-step random access
  • the second message (Msg 2) and the fourth message in the four-step random access are sent (Msg 4) is sent as the second message (Message B, Msg B) in two-step random access.
  • two-step random access resources and four-step random access resources can be configured on the uplink bandwidth part (Band Width Part, BWP) at the same time. How to select a random access method for a terminal device is an urgent problem to be solved.
  • the embodiments of this application provide a wireless communication method, terminal equipment, and network equipment.
  • the terminal device preferentially selects the two-step random access resource. Access, and the terminal device can determine whether to allow switching from two-step random access to four-step random access, which realizes the flexibility of random access.
  • a wireless communication method including:
  • the terminal device determines whether to allow switching from the two-step random access to the four-step random access.
  • a wireless communication method in a second aspect, includes:
  • the network device When two-step random access resources and four-step random access resources are configured on the uplink BWP, the network device sends the first configuration information for configuring the two-step random access parameters and the first configuration information for configuring the four-step random access to the terminal device.
  • the second configuration information of the access parameter where the first configuration information and the second configuration information are used by the terminal device to determine whether to allow switching from two-step random access to four-step random access.
  • a terminal device which is used to execute the method in the foregoing first aspect or each of its implementation manners.
  • the terminal device includes a functional module for executing the method in the foregoing first aspect or each of its implementation manners.
  • a network device is provided, which is used to execute the method in the second aspect or its implementation manners.
  • the network device includes a functional module for executing the method in the foregoing second aspect or each of its implementation manners.
  • a terminal device including a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory to execute the method in the above-mentioned first aspect or each of its implementation modes.
  • a network device including a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory to execute the method in the second aspect or its implementation manners.
  • a device for implementing any one of the first aspect to the second aspect or the method in each implementation manner thereof.
  • the device includes: a processor, configured to call and run a computer program from the memory, so that the device installed with the device executes any one of the above-mentioned first aspect to the second aspect or any of the implementations thereof method.
  • a computer-readable storage medium for storing a computer program that enables a computer to execute any one of the first aspect to the second aspect or the method in each implementation manner thereof.
  • a computer program product including computer program instructions that cause a computer to execute any one of the above-mentioned first to second aspects or the method in each implementation manner thereof.
  • a computer program which when running on a computer, causes the computer to execute any one of the above-mentioned first aspect to the second aspect or the method in each implementation manner thereof.
  • the terminal device can determine whether to allow switching from two-step random access to four-step random access. This improves the flexibility of random access.
  • FIG. 1 is a schematic diagram of a communication system architecture provided by an embodiment of the present application.
  • Fig. 2 is a schematic diagram of a four-step random access provided by an embodiment of the present application.
  • Fig. 3 is a schematic diagram of a two-step random access according to an embodiment of the present application.
  • Fig. 4 is a schematic diagram of a two-step random access fallback four-step random access according to an embodiment of the present application.
  • Fig. 5 is a schematic flowchart of a wireless communication method provided according to an embodiment of the present application.
  • Fig. 6 is a flow chart of judging a switch from two-step random access to four-step random access according to an embodiment of the present application.
  • Fig. 7 is a judgment flow chart of another two-step random access handover to four-step random access according to an embodiment of the present application.
  • Fig. 8 is a flow chart of determining another two-step random access handover to four-step random access according to an embodiment of the present application.
  • Fig. 9 is a schematic flowchart of another wireless communication method provided according to an embodiment of the present application.
  • Fig. 10 is a schematic block diagram of a terminal device according to an embodiment of the present application.
  • Fig. 11 is a schematic block diagram of a network device according to an embodiment of the present application.
  • Fig. 12 is a schematic block diagram of a communication device according to an embodiment of the present application.
  • Fig. 13 is a schematic block diagram of an apparatus provided according to an embodiment of the present application.
  • Fig. 14 is a schematic block diagram of a communication system according to an embodiment of the present application.
  • GSM Global System of Mobile Communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Advanced Long Term Evolution
  • New Air Interface New Radio, NR
  • evolution of NR system LTE (LTE-based access to unlicensed spectrum, LTE-U) system on unlicensed spectrum, NR (NR-based access to unlicensed spectrum, on unlicensed spectrum, NR-U) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), next-generation communication systems or other communication systems, etc.
  • D2D Device to Device
  • M2M Machine to Machine
  • MTC machine type communication
  • V2V vehicle to vehicle
  • the communication system in the embodiments of the present application can be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, can also be applied to a dual connectivity (DC) scenario, and can also be applied to a standalone (SA) deployment.
  • CA Carrier Aggregation
  • DC dual connectivity
  • SA standalone
  • the embodiment of the application does not limit the applied frequency spectrum.
  • the embodiments of this application can be applied to licensed spectrum or unlicensed spectrum.
  • the communication system 100 applied in the embodiment of the present application is shown in FIG. 1.
  • the communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or called a communication terminal or terminal).
  • the network device 110 may provide communication coverage for a specific geographic area, and may communicate with terminal devices located in the coverage area.
  • Figure 1 exemplarily shows one network device and two terminal devices.
  • the communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminal devices. The embodiment does not limit this.
  • the communication system 100 may also include other network entities such as a network controller and a mobility management entity, which are not limited in the embodiment of the present application.
  • network entities such as a network controller and a mobility management entity, which are not limited in the embodiment of the present application.
  • the devices with communication functions in the network/system in the embodiments of the present application may be referred to as communication devices.
  • the communication device may include a network device 110 having a communication function and a terminal device 120.
  • the network device 110 and the terminal device 120 may be the specific devices described above, which will not be repeated here.
  • the communication device may also include other devices in the communication system 100, such as network controllers, mobility management entities and other network entities, which are not limited in the embodiment of the present application.
  • terminal equipment may also be referred to as User Equipment (UE), access terminal, subscriber unit, user station, mobile station, mobile station, and remote Station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.
  • UE User Equipment
  • the terminal device can be a station (STAION, ST) in a WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, and personal digital processing (Personal Digital Assistant, PDA) devices, handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, and next-generation communication systems, such as terminal devices in the NR network or Terminal equipment in the public land mobile network (PLMN) network that will evolve in the future.
  • STAION, ST station
  • WLAN Wireless Local Loop
  • PDA Personal Digital Assistant
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices. It is a general term for using wearable technology to intelligently design everyday wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes.
  • a wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. Wearable devices are not only a kind of hardware device, but also realize powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-sized, complete or partial functions that can be achieved without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, and need to cooperate with other devices such as smart phones.
  • a network device can be a device used to communicate with mobile devices.
  • the network device can be an access point (AP) in WLAN, a base station (BTS) in GSM or CDMA, or a device in WCDMA.
  • a base station (NodeB, NB) can also be an Evolutional Node B (eNB or eNodeB) in LTE, or a relay station or access point, or a vehicle-mounted device, a wearable device, and a network device or base station in the NR network (gNB) or network equipment in the future evolved PLMN network.
  • the network equipment provides services for the cell
  • the terminal equipment communicates with the network equipment through the transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell
  • the cell may be a network equipment (for example, The cell corresponding to the base station.
  • the cell can belong to a macro base station or a base station corresponding to a small cell.
  • the small cell here can include: Metro cell, Micro cell, Pico Cells, Femto cells, etc. These small cells have the characteristics of small coverage and low transmit power, and are suitable for providing high-rate data transmission services.
  • the terminal device After the cell search process, the terminal device has achieved downlink synchronization with the cell, so the terminal device can receive downlink data. However, the terminal equipment can only perform uplink transmission if it has achieved uplink synchronization with the cell.
  • the terminal device can establish a connection with the cell and obtain uplink synchronization through a random access procedure (Random Access Procedure).
  • Random Access Procedure Random Access Procedure
  • the random access process can usually be triggered by the following events:
  • the terminal device needs to enter the RRC connected state (RRC_CONNECTED) from the radio resource control (Radio Resource Control, RRC) idle state (RRC_IDLE state). At this time, the terminal device can trigger initial access.
  • RRC connected state RRC_CONNECTED
  • RRC Radio Resource Control
  • RRC_IDLE state Radio Resource Control
  • the terminal device is in the connected state and needs to establish uplink synchronization with the new cell.
  • the uplink is in a "non-synchronised” state (DL or UL data arrival during RRC_CONNECTED when UL synchronisation status is "non-synchronised”).
  • the terminal device transitions from the RRC inactive state (Transition from RRC_INACTIVE).
  • the terminal device requests other system information (Other System Information, OSI).
  • OSI Operating System Information
  • the terminal device needs to perform beam failure recovery.
  • the four-step random access includes:
  • Step 1 The terminal device sends a random access preamble (Preamble, also known as Msg 1) to the network device.
  • Preamble also known as Msg 1
  • the random access preamble may also be referred to as a preamble, a random access preamble sequence, a preamble sequence, and so on.
  • the terminal device may select physical random access channel (Physical Random Access Channel, PRACH) resources, and the PRACH resources may include time domain resources, frequency domain resources, and code domain resources.
  • the network device sends random access related parameters to the terminal device through the broadcast system information block (System Information Block, SIB) 1, where the random access common configuration information element (RACH-ConfigCommon IE) for the synchronization signal block (Synchronization Signal Block, SSB) Reference Signal Receiving Power (RSRP) threshold (rsrp-ThresholdSSB) is used for terminal equipment to select SSB.
  • SIB System Information Block
  • the terminal equipment compares the RSRP measurement results under each SSB with rsrp-ThresholdSSB and selects The SSB whose measurement value is higher than the configured threshold is accessed. If there is no SSB that meets the configured threshold, one of all SSBs is randomly selected for access.
  • Each SSB corresponds to a set of random access preamble (Preamble) resources and random access opportunity (RACH Occasion, RO) resources, and the terminal device randomly selects from the selected SSB for contention-based random access resources, Set the Preamble index (PREAMBLE_INDEX) to the selected random access Preamble.
  • Preamble random access preamble
  • RACH Occasion, RO random access opportunity
  • the network device can estimate the transmission delay between it and the terminal device according to the Preamble and use this to calibrate the uplink timing, and can roughly determine the size of the resource required for the terminal device to transmit Msg3.
  • the preamble is divided into preamble group A and preamble group B. If preamble group B exists in the random access resources, The terminal device can select the preamble group according to the size of the Msg 3 and the path loss (pathloss).
  • Step 2 The network device sends a random access response (Random Access Response, RAR, or Msg 2) to the terminal device
  • the terminal device After the terminal device sends the Preamble to the network device, it can open a random access response window (ra-ResponseWindow), in which ra-ResponseWindow is detected based on the random access radio network temporary identifier (RA-RNTI) Corresponding Physical Downlink Control Channel (PDCCH). If the terminal device detects the PDCCH scrambled by the RA-RNTI, it can obtain the Physical Downlink Shared Channel (PDSCH) scheduled by the PDCCH. Wherein, the PDSCH includes the RAR corresponding to the Preamble.
  • ra-ResponseWindow random access radio network temporary identifier
  • PDSCH Physical Downlink Shared Channel
  • the PDSCH includes the RAR corresponding to the Preamble.
  • RA-RNTI is calculated based on the time-frequency position of the PRACH that sends the Preamble. Therefore, if multiple terminal devices send the Preamble on the same RO, the corresponding RAR is multiplexed in the same RAR Media Access Control Protocol Data Unit (Media Access Control). Protocol Data Unit, MAC PDU).
  • Media Access Control Media Access Control Protocol Data Unit
  • the terminal If the terminal successfully receives the RA-RNTI scrambled PDCCH corresponding to the RO resource sending the preamble, and the RAR contains a random access sequence identifier (Random Access Preamble Identifier, RAPID) carried by the MAC subPDU (subPDU) and the above If the PREAMBLE_INDEX selected in Msg 1 corresponds, the RAR is successfully received, and the terminal can decode the timing advance command (Timing Advance Command, TAC), uplink authorization resource (UL Grant), and temporary cell RNTI (Temporary Cell Radio Network Temporary Identity, TC-). RNTI), proceed to Msg 3.
  • TAC Timing Advance Command
  • UL Grant uplink authorization resource
  • TC- Temporary Cell Radio Network Temporary Identity
  • the terminal device needs to retransmit Msg 1, if the number of transmissions of the preamble exceeds the network configuration The maximum number of transmissions (preambleTransMax), the terminal device reports the random access problem to the upper layer.
  • Step 3 The terminal device sends Msg 3.
  • the terminal device After receiving the RAR message, the terminal device determines whether the RAR is its own RAR message. For example, the terminal device can use the preamble index to check, and after determining that it is its own RAR message, it can generate Msg 3 at the RRC layer, and Send Msg 3 to the network device, which needs to carry the identification information of the terminal device, etc.
  • Msg 3 is mainly used to notify the network equipment of the random access trigger event.
  • the Msg 3 sent by the terminal device in step 3 may include different content.
  • Msg 3 may include an RRC connection request message (RRC Setup Request) generated by the RRC layer.
  • RRC Setup Request RRC Setup Request
  • Msg 3 may also carry, for example, the 5G-service temporary mobile subscriber identity (Serving-Temporary Mobile Subscriber Identity, S-TMSI) or random number of the terminal device.
  • S-TMSI Serving-Temporary Mobile Subscriber Identity
  • Msg 3 may include an RRC connection re-establishment request message (RRC Reestabilshment Request) generated by the RRC layer.
  • RRC Reestabilshment Request RRC connection re-establishment request message
  • Msg 3 may also carry, for example, a Cell Radio Network Temporary Identifier (C-RNTI) and so on.
  • C-RNTI Cell Radio Network Temporary Identifier
  • Msg 3 may include an RRC handover confirmation message (RRC Handover Confirm) generated by the RRC layer, which carries the C-RNTI of the terminal device.
  • RRC Handover Confirm RRC handover confirmation message
  • Msg 3 may also carry information such as a Buffer Status Report (BSR).
  • BSR Buffer Status Report
  • Msg 3 may at least include the C-RNTI of the terminal device.
  • Step 4 The network device sends a contention resolution message (Msg4) to the terminal device.
  • Msg4 contention resolution message
  • the network device sends Msg 4 to the terminal device, and the terminal device correctly receives the Msg 4 to complete the contention resolution (Contention Resolution).
  • Msg 4 may carry an RRC connection establishment message.
  • the network device Since the terminal device in step 3 can carry its own unique identifier in Msg 3, the network device will carry the unique identifier of the terminal device in Msg4 in the contention resolution mechanism to specify the terminal device that wins the competition. Other terminal devices that did not win in the contention resolution will re-initiate random access.
  • the Msg 4 can be scheduled with the PDCCH scrambled by the TC-RNTI.
  • the resolution of the contention conflict can be achieved by receiving the PDSCH of Msg 4 by the terminal device and obtaining the conflict resolution ID.
  • the service data unit Service Data Unit
  • SDU Data Unit
  • the delay of four-step random access is relatively large, which is not suitable for the low-latency and high-reliability scenarios in 5G.
  • a two-step random access scheme is proposed.
  • the Msg A in the two-step random access includes the Preamble transmitted on the PRACH and the load information transmitted on the Physical Uplink Shared Channel (PUSCH).
  • PUSCH Physical Uplink Shared Channel
  • the terminal device listens in the configured window In response from the network side, if it receives an indication of successful contention conflict resolution from the network, the terminal ends the random access process, as shown in Figure 3; if it receives a fallback instruction in Msg B, the terminal device executes Msg 3 The transmission and monitoring of the contention conflict resolution result, as shown in Figure 4. If the contention resolution is unsuccessful after the transmission of Msg 3, the terminal continues the transmission of Msg A.
  • the UE When both two-step random access resources and four-step random access resources are configured on the UL BWP, the UE needs to select the random access type. Assuming that the RSRP measured by the UE is higher than the threshold configured by the network, the UE enters the two-step process Random access process. The network can configure the maximum number of transmissions of Msg A for the UE'N'. If the UE fails to access after'N' two-step random access attempts, the UE will fall back or switch to the four-step random access Continue with the access attempt.
  • FIG. 5 is a schematic flowchart of a wireless communication method 200 according to an embodiment of the present application. As shown in FIG. 5, the method 200 may include the following content:
  • the terminal device determines whether to allow switching from the two-step random access to the four-step random access.
  • the terminal device when two-step random access resources and four-step random access resources are configured on the uplink BWP, the terminal device can be allowed to perform two-step random access on the two-step random access resources of the uplink BWP. , And perform four-step random access on the four-step random access resource of the uplink BWP, the terminal device can realize two-step random access and four-step random access.
  • the terminal device preferentially performs two-step random access.
  • step S210 may specifically be:
  • the terminal device determines whether to allow switching from two-step random access to four-step random access according to the first information
  • the first information includes at least one of the following:
  • the first message of the two-step random access may be the aforementioned Msg A
  • the third message of the four-step random access may be the aforementioned Msg 3.
  • the switching instruction information is configured by the network device in the two-step random access parameter configuration.
  • the switching instruction information is the switching permission indication (SwitchingAllowed), SwitchingAllowed configuration is false (false) means that it is not allowed to switch from two-step random access to four-step random access, and SwitchingAllowed is configured as true (true) means that switching from two-step random access is allowed Random access is switched to four-step random access.
  • the maximum number of transmissions of the first message of the two-step random access is configured by the network device in the two-step random access parameter configuration.
  • the at least one random access preamble group is configured by the network device in the four-step random access parameter configuration.
  • the network device also configures the at least one random access preamble group in the two-step random access parameter configuration.
  • the network device configures Preamble group A and Preamble group B in the two-step random access parameter configuration.
  • the network device also configures Preamble group A and Preamble group B in the four-step random access parameter configuration.
  • the terminal device selects Preamble from Preamble group A in the process of two-step random access. After switching from two-step random access to four-step random access, the terminal device also selects Preamble from Preamble group A. Four-step random access.
  • the payload size (Msg A payload size) of the first message of two-step random access and the size of the third message of four-step random access corresponding to at least one random access preamble group ( Whether ra-Msg3Size) matches or not can be further understood through Case 1 and Case 2 below.
  • Case 2 The network device is configured with Group A and Group B and the size threshold ra-Msg3SizeGroupA in the four-step random access resource at the same time;
  • MsgA payload size ⁇ ra-Msg3SizeGroupA, it matches the Msg3size corresponding to Group A;
  • the terminal device may be based on the handover indication information of "whether it is allowed to switch from two-step random access to four-step random access" in the first information, and the first item of two-step random access Whether the load size of the message matches the size of the third message of the four-step random access corresponding to at least one random access preamble group", determine whether to allow switching from two-step random access to four-step random access.
  • the terminal device determines whether to allow switching from two-step random access to four-step random access according to the first information, including one of the following:
  • the terminal device determines that it is not allowed to switch from two-step random access to four-step random access;
  • the handover indication information indicates that it is allowed to switch from two-step random access to four-step random access, and the load size of the first message of two-step random access is equal to part or all of the at least one random access preamble group
  • the size of the third message of the four-step random access corresponding to the random access preamble group matches, and the terminal device determines that it is allowed to switch from the two-step random access to the four-step random access;
  • the handover indication information indicates that it is allowed to switch from two-step random access to four-step random access
  • the load size of the first message of the two-step random access is the same as that of all random accesses in the at least one random access preamble group
  • the size of the third message of the four-step random access corresponding to the incoming preamble group does not match, and the terminal device determines that it is not allowed to switch from the two-step random access to the four-step random access.
  • the terminal device may be based on the "load size of the first message of the two-step random access and the four-step random access corresponding to the at least one random access preamble group in the first information. Whether the size of the third message matches", determine whether to allow switching from two-step random access to four-step random access.
  • the terminal device determines whether to allow switching from two-step random access to four-step random access according to the first information, including one of the following:
  • the terminal device determines that it is allowed to switch from two-step random access to four-step random access;
  • the terminal device determines that it is not allowed to switch from two-step random access to four-step random access.
  • the terminal device may be based on the value of "the maximum number of transmissions of the first message of two-step random access, and the value of the first message of the two-step random access" in the first information. Whether the load size matches the size of the third message of the four-step random access corresponding to at least one random access preamble group", determine whether to allow switching from two-step random access to four-step random access.
  • the terminal device determines whether to allow switching from two-step random access to four-step random access according to the first information, including one of the following:
  • the terminal device determines that it is not allowed to switch from two-step random access to four-step random access;
  • the terminal device determines that it is allowed to switch from the two-step random access to the four-step random access;
  • the terminal device determines that it is not allowed to switch from the two-step random access to the four-step random access.
  • the terminal device determines that it is not allowed to switch from two-step random access to four-step random access, the terminal device performs random access after N times of two-step random access attempts.
  • the access problem is reported, where N is the maximum number of transmissions of the first message in two-step random access.
  • the terminal device determines that it is not allowed to switch from two-step random access to four-step random access, the terminal device performs the random access problem after trying M two-step random access Reporting, where M is the maximum number of attempts to trigger problem reporting in two-step random access.
  • M is configured by the network device in the two-step random access parameter configuration.
  • the terminal device determines that it is allowed to switch from two-step random access to four-step random access, after N times of two-step random access, the terminal device will start from two-step random access. Random access is switched to four-step random access, where N is the maximum number of transmissions of the first message in two-step random access.
  • the terminal device selects a random access preamble for four-step random access from the first random access preamble group , Where the first random access preamble group is the size of the third message of the four-step random access corresponding to the at least one random access preamble group and the load of the first message of the two-step random access A random access preamble group of matching size.
  • the terminal device when two-step random access resources and four-step random access resources are configured on the uplink BWP at the same time, the terminal device can determine whether to allow switching from two-step random access to four-step random access. Access realizes the flexibility of random access.
  • the wireless communication method 200 described above is described in detail below with a specific embodiment.
  • the network device configures SwitchingAllowed and Msg A maximum transmission times N in the two-step random access parameter information element (Information element, IE) for the terminal device.
  • Information element, IE Information element
  • the terminal device indicates Preamble group for four-step random access, suppose there are Preamble group A and Preamble group B.
  • the judging process of switching from two-step random access to four-step random access can be shown in FIG. 6.
  • the terminal equipment switches to the four-step random access after N times of the two-step random access, and selects the preamble for the four-step random access from the Preamble group A.
  • the terminal equipment switches to the four-step random access after N times of the two-step random access, and selects the preamble for the four-step random access from Preamble group B.
  • the terminal equipment cannot switch to the four-step random access after trying N times of the two-step random access, but reports the random access problem.
  • a parameter display is introduced in the two-step random access configuration to indicate whether switching is allowed, for example, it is named SwitchingAllowed. If SwitchingAllowed is set to false, it means switching is not allowed. If SwitchingAllowed is set to true, it means switching is allowed.
  • the terminal device further determines whether handover can occur according to the relationship between the Msg A payload size and the Msg 3 size corresponding to the Preamble group.
  • the network device configures the maximum number of Msg A transmissions N for the terminal device in the two-step random access parameter IE, and indicates the preamble group for the four-step random access for the terminal device in the four-step random access parameter IE, Suppose there are Preamble group A and Preamble group B.
  • the judging process of switching from two-step random access to four-step random access can be shown in FIG. 7.
  • the terminal device switches to the four-step random access after N times of the two-step random access, and selects the preamble for the four-step random access from Preamble group A or Preamble group B.
  • Embodiment 2 the terminal device implicitly infers whether the handover is allowed and can occur through whether the Msg A payload size matches the Msg 3 size corresponding to the Preamble group.
  • Embodiment 2 does not require the network device to explicitly indicate whether handover can occur, which saves signaling overhead, but at the same time limits the flexibility of the network device to configure the uplink resources used to transmit the MsgA payload to achieve hidden
  • the formula indicates whether the purpose of RACH type switching can be performed.
  • the network device reports the maximum number of attempts M and Msg A maximum number of transmissions N in the two-step random access parameter IE for the terminal device configuration problem, and the four-step random access parameter IE indicates the terminal device for four steps Preamble group for random access, suppose there are Preamble group A and Preamble group B.
  • the judging process of switching from two-step random access to four-step random access can be shown in FIG. 8.
  • Msg A payload size matches the Msg 3 size corresponding to Preamble group A,
  • the terminal device switches to the four-step random access after N times of the two-step random access, and selects the preamble for the four-step random access from Preamble group A.
  • Msg A payload size matches the Msg 3 size corresponding to Preamble group B,
  • the terminal device switches to the four-step random access after N times of the two-step random access, and selects the preamble for the four-step random access from Preamble group B.
  • Msg A payload size does not match the Msg 3 size corresponding to Preamble group A and Preamble group B,
  • the terminal device cannot switch to the four-step random access after N times of the two-step random access, until the number of transmissions of Msg A reaches M times, the random access problem is reported.
  • the terminal device determines whether to allow handover according to whether the maximum number of transmissions N of Msg A is configured and whether N is a finite value.
  • the parameter M is introduced in the two-step random access configuration to indicate the maximum number of attempts to report the two-step random access problem.
  • the terminal device further judges whether handover can occur through the relationship between the Msg A payload size and the Msg 3 size corresponding to the Preamble group.
  • FIG. 9 is a schematic flowchart of a wireless communication method 300 according to an embodiment of the present application. As shown in FIG. 9, the method 300 may include the following content:
  • the network device sends the first configuration information for configuring the two-step random access parameter and the fourth configuration information to the terminal device.
  • the second configuration information of the step random access parameter where the first configuration information and the second configuration information are used for the terminal device to determine whether to allow switching from the two-step random access to the four-step random access.
  • the first configuration information includes at least one of the following:
  • At least one random access preamble group for two-step random access At least one random access preamble group for two-step random access.
  • the first configuration information includes at least one of the following:
  • At least one random access preamble group for two-step random access At least one random access preamble group for two-step random access.
  • the second configuration information includes at least one random access preamble group used for four-step random access.
  • the terminal device when two-step random access resources and four-step random access resources are configured on the uplink BWP at the same time, the terminal device can configure the two-step random access parameters based on the parameters sent by the network device.
  • the first configuration information for configuring the four-step random access parameters and the second configuration information for configuring the four-step random access parameters determine whether to allow switching from the two-step random access to the four-step random access, which realizes the flexibility of random access.
  • FIG. 10 shows a schematic block diagram of a terminal device 400 according to an embodiment of the present application.
  • the terminal device 400 includes:
  • the processing unit 410 in which,
  • the processing unit 410 is used to determine whether to allow switching from the two-step random access to the four-step random access.
  • processing unit 410 is specifically configured to:
  • the first information includes at least one of the following:
  • the processing unit 410 determines whether to allow switching from two-step random access to four-step random access according to the first information, including one of the following:
  • the processing unit 410 determines that switching from two-step random access to four-step random access is not allowed;
  • the processing unit 410 determines that it is allowed to switch from the two-step random access to the four-step random access;
  • the handover indication information indicates that it is allowed to switch from two-step random access to four-step random access
  • the load size of the first message of the two-step random access is the same as that of all random accesses in the at least one random access preamble group
  • the size of the third message of the four-step random access corresponding to the incoming preamble group does not match, and the processing unit 410 determines that it is not allowed to switch from the two-step random access to the four-step random access.
  • the processing unit 410 determines whether to allow switching from two-step random access to four-step random access according to the first information, including one of the following:
  • the processing unit 410 determines that it is allowed to switch from two-step random access to four-step random access;
  • the processing unit 410 determines that it is not allowed to switch from two-step random access to four-step random access.
  • the processing unit 410 determines whether to allow switching from two-step random access to four-step random access according to the first information, including one of the following:
  • the processing unit 410 determines that it is not allowed to switch from the two-step random access to the four-step random access;
  • the processing unit 410 determines that it is allowed to switch from the two-step random access to the four-step random access;
  • the processing unit 410 determines that it is not allowed to switch from the two-step random access to the four-step random access.
  • the terminal device further includes: a communication unit,
  • the communication unit is used to report random access problems, where: N is the maximum number of transmissions of the first message in two-step random access.
  • the terminal device further includes: a communication unit,
  • the communication unit is used to report random access problems, where: M is the maximum number of attempts to trigger problem reporting in two-step random access.
  • M is configured by the network device in the two-step random access parameter configuration.
  • the processing unit 410 is further configured to switch from two-step random access. Access is switched to four-step random access, where N is the maximum number of transmissions of the first message in two-step random access.
  • the processing unit 410 is further configured to select a random access preamble for four-step random access from the first random access preamble group, where the first random access preamble group is the at least A random access preamble group in which the size of the third message of the corresponding four-step random access in a random access preamble group matches the load size of the first message of the two-step random access.
  • the handover indication information and/or the maximum transmission times of the first message of the two-step random access are configured by the network device in the two-step random access parameter configuration.
  • the at least one random access preamble group is configured by the network device in the four-step random access parameter configuration.
  • the aforementioned communication unit may be a communication interface or a transceiver, or an input/output interface of a communication chip or a system-on-chip.
  • the aforementioned processing unit may be one or more processors.
  • terminal device 400 may correspond to the terminal device in the method embodiment of the present application, and the foregoing and other operations and/or functions of each unit in the terminal device 400 are to implement the method shown in FIG. 5, respectively.
  • the corresponding process of the terminal equipment in 200 will not be repeated here.
  • FIG. 11 shows a schematic block diagram of a network device 500 according to an embodiment of the present application.
  • the network device 500 includes:
  • the communication unit 510 in which,
  • the communication unit 510 is used to send the first configuration information for configuring the two-step random access parameter and the first configuration information to the terminal device.
  • the second configuration information for configuring the four-step random access parameters where the first configuration information and the second configuration information are used for the terminal device to determine whether to allow switching from the two-step random access to the four-step random access.
  • the first configuration information includes at least one of the following:
  • At least one random access preamble group for two-step random access At least one random access preamble group for two-step random access.
  • the first configuration information includes at least one of the following:
  • At least one random access preamble group for two-step random access At least one random access preamble group for two-step random access.
  • the second configuration information includes at least one random access preamble group used for four-step random access.
  • the aforementioned communication unit may be a communication interface or a transceiver, or an input/output interface of a communication chip or a system-on-chip.
  • the network device 500 may correspond to the network device in the method embodiment of the present application, and the foregoing and other operations and/or functions of each unit in the network device 500 are to implement the method shown in FIG. 9 respectively.
  • the corresponding process of the network equipment in 300 will not be repeated here.
  • FIG. 12 is a schematic structural diagram of a communication device 600 provided by an embodiment of the present application.
  • the communication device 600 shown in FIG. 12 includes a processor 610, and the processor 610 can call and run a computer program from a memory to implement the method in the embodiment of the present application.
  • the communication device 600 may further include a memory 620.
  • the processor 610 may call and run a computer program from the memory 620 to implement the method in the embodiment of the present application.
  • the memory 620 may be a separate device independent of the processor 610, or may be integrated in the processor 610.
  • the communication device 600 may further include a transceiver 630, and the processor 610 may control the transceiver 630 to communicate with other devices. Specifically, it may send information or data to other devices, or receive other devices. Information or data sent by the device.
  • the transceiver 630 may include a transmitter and a receiver.
  • the transceiver 630 may further include an antenna, and the number of antennas may be one or more.
  • the communication device 600 may specifically be a network device of an embodiment of the present application, and the communication device 600 may implement the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, it will not be repeated here. .
  • the communication device 600 may specifically be a mobile terminal/terminal device of an embodiment of the present application, and the communication device 600 may implement the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application.
  • I won’t repeat it here.
  • Fig. 13 is a schematic structural diagram of a device according to an embodiment of the present application.
  • the apparatus 700 shown in FIG. 13 includes a processor 710, and the processor 710 can call and run a computer program from a memory to implement the method in the embodiment of the present application.
  • the apparatus 700 may further include a memory 720.
  • the processor 710 may call and run a computer program from the memory 720 to implement the method in the embodiment of the present application.
  • the memory 720 may be a separate device independent of the processor 710, or may be integrated in the processor 710.
  • the device 700 may further include an input interface 730.
  • the processor 710 can control the input interface 730 to communicate with other devices or chips, and specifically, can obtain information or data sent by other devices or chips.
  • the device 700 may further include an output interface 740.
  • the processor 710 can control the output interface 740 to communicate with other devices or chips, and specifically, can output information or data to other devices or chips.
  • the device can be applied to the network equipment in the embodiments of the present application, and the device can implement the corresponding processes implemented by the network equipment in the various methods of the embodiments of the present application.
  • the device can implement the corresponding processes implemented by the network equipment in the various methods of the embodiments of the present application.
  • details are not described herein again.
  • the device can be applied to the mobile terminal/terminal device in the embodiment of the present application, and the device can implement the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application.
  • the device can implement the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application.
  • the device can implement the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application.
  • the device mentioned in the embodiment of the present application may also be a chip.
  • it can be a system-on-chip, a system-on-chip, a system-on-chip, or a system-on-chip.
  • FIG. 14 is a schematic block diagram of a communication system 800 provided by an embodiment of the present application. As shown in FIG. 14, the communication system 800 includes a terminal device 810 and a network device 820.
  • the terminal device 810 can be used to implement the corresponding function implemented by the terminal device in the above method
  • the network device 820 can be used to implement the corresponding function implemented by the network device in the above method. For brevity, it will not be repeated here. .
  • the processor of the embodiment of the present application may be an integrated circuit chip with signal processing capability.
  • the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software.
  • the above-mentioned processor may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (ASIC), a ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other Programming logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • DSP Digital Signal Processor
  • ASIC application specific integrated circuit
  • FPGA Field Programmable Gate Array
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor.
  • the software module may be located in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers.
  • the storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.
  • the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), and electrically available Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be a random access memory (Random Access Memory, RAM), which is used as an external cache.
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • DDR SDRAM Double Data Rate Synchronous Dynamic Random Access Memory
  • Enhanced SDRAM, ESDRAM Enhanced Synchronous Dynamic Random Access Memory
  • Synchronous Link Dynamic Random Access Memory Synchronous Link Dynamic Random Access Memory
  • DR RAM Direct Rambus RAM
  • the memory in the embodiment of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and so on. That is to say, the memory in the embodiments of the present application is intended to include, but is not limited to, these and any other suitable types of memory.
  • the embodiments of the present application also provide a computer-readable storage medium for storing computer programs.
  • the computer-readable storage medium can be applied to the network device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer-readable storage medium can be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application , For the sake of brevity, I won’t repeat it here.
  • the embodiments of the present application also provide a computer program product, including computer program instructions.
  • the computer program product can be applied to the network device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the computer program product can be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application, For the sake of brevity, I will not repeat them here.
  • the embodiment of the present application also provides a computer program.
  • the computer program can be applied to the network device in the embodiment of the present application.
  • the computer program runs on the computer, it causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • I won’t repeat it here.
  • the computer program can be applied to the mobile terminal/terminal device in the embodiment of the present application.
  • the computer program runs on the computer, the computer executes each method in the embodiment of the present application. For the sake of brevity, the corresponding process 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, for example, 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 function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of the present application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

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Abstract

本申请实施例提供了一种无线通信方法、终端设备和网络设备,在上行BWP上同时配置了两步随机接入资源和四步随机接入资源的情况下,终端设备优先选择进行两步随机接入,且终端设备可以确定是否允许从两步随机接入切换至四步随机接入,实现了随机接入的灵活性。该无线通信方法包括:在上行BWP上配置了两步随机接入资源和四步随机接入资源的情况下,终端设备确定是否允许从两步随机接入切换至四步随机接入。

Description

无线通信方法、终端设备和网络设备 技术领域
本申请实施例涉及通信领域,并且更具体地,涉及一种无线通信方法、终端设备和网络设备。
背景技术
在新无线(New Radio,NR)系统中可以支持两步随机接入,在两步随机接入中,可以将四步随机接入中的第一条消息(Message 1,Msg 1)和第三条消息(Msg 3)作为两步随机接入中的第一条消息(Message A,Msg A)来发送,并将四步随机接入中的第二条消息(Msg 2)和第四条消息(Msg 4)作为两步随机接入中的第二条消息(Message B,Msg B)来发送。在某些场景下,上行带宽部分(Band Width Part,BWP)上可以同时配置两步随机接入资源和四步随机接入资源,终端设备如何选择随机接入方式,是一个亟待解决的问题。
发明内容
本申请实施例提供了一种无线通信方法、终端设备和网络设备,在上行BWP上同时配置了两步随机接入资源和四步随机接入资源的情况下,终端设备优先选择进行两步随机接入,且终端设备可以确定是否允许从两步随机接入切换至四步随机接入,实现了随机接入的灵活性。
第一方面,提供了一种无线通信方法,该方法包括:
在上行BWP上配置了两步随机接入资源和四步随机接入资源的情况下,终端设备确定是否允许从两步随机接入切换至四步随机接入。
第二方面,提供了一种无线通信方法,该方法包括:
在上行BWP上配置了两步随机接入资源和四步随机接入资源的情况下,网络设备向终端设备发送用于配置两步随机接入参数的第一配置信息和用于配置四步随机接入参数的第二配置信息,其中,所述第一配置信息和所述第二配置信息用于所述终端设备确定是否允许从两步随机接入切换至四步随机接入。
第三方面,提供了一种终端设备,用于执行上述第一方面或其各实现方式中的方法。
具体地,该终端设备包括用于执行上述第一方面或其各实现方式中的方法的功能模块。
第四方面,提供了一种网络设备,用于执行上述第二方面或其各实现方式中的方法。
具体地,该网络设备包括用于执行上述第二方面或其各实现方式中的方法的功能模块。
第五方面,提供了一种终端设备,包括处理器和存储器。该存储器用于存储计算机程序,该处理器用于调用并运行该存储器中存储的计算机程序,执行上述第一方面或其各实现方式中的方法。
第六方面,提供了一种网络设备,包括处理器和存储器。该存储器用于存储计算机程序,该处理器用于调用并运行该存储器中存储的计算机程序,执行上述第二方面或其各实现方式中的方法。
第七方面,提供了一种装置,用于实现上述第一方面至第二方面中的任一方面或其各实现方式中的方法。
具体地,该装置包括:处理器,用于从存储器中调用并运行计算机程序,使得安装有该装置的设备执行如上述第一方面至第二方面中的任一方面或其各实现方式中的方法。
第八方面,提供了一种计算机可读存储介质,用于存储计算机程序,该计算机程序使得计算机执行上述第一方面至第二方面中的任一方面或其各实现方式中的方法。
第九方面,提供了一种计算机程序产品,包括计算机程序指令,所述计算机程序指令使得计算机执行上述第一方面至第二方面中的任一方面或其各实现方式中的方法。
第十方面,提供了一种计算机程序,当其在计算机上运行时,使得计算机执行上述第一方面至第二方面中的任一方面或其各实现方式中的方法。
通过上述技术方案,在上行BWP上同时配置了两步随机接入资源和四步随机接入资源的情况下,终端设备可以确定是否允许从两步随机接入切换至四步随机接入,实现了随机接入的灵活性。
附图说明
图1是本申请实施例提供的一种通信系统架构的示意性图。
图2是本申请实施例提供的一种四步随机接入的示意图。
图3是根据本申请实施例的一种两步随机接入的示意图。
图4是根据本申请实施例的一种两步随机接入回退四步随机接入的示意图。
图5是根据本申请实施例提供的一种无线通信方法的示意性流程图。
图6是根据本申请实施例提供的一种两步随机接入切换至四步随机接入的判断流程图。
图7是根据本申请实施例提供的另一种两步随机接入切换至四步随机接入的判断流程图。
图8是根据本申请实施例提供的再一种两步随机接入切换至四步随机接入的判断流程图。
图9是根据本申请实施例提供的另一种无线通信方法的示意性流程图。
图10是根据本申请实施例提供的一种终端设备的示意性框图。
图11是根据本申请实施例提供的一种网络设备的示意性框图。
图12是根据本申请实施例提供的一种通信设备的示意性框图。
图13是根据本申请实施例提供的一种装置的示意性框图。
图14是根据本申请实施例提供的一种通信系统的示意性框图。
具体实施方式
下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行描述,显然,所描述的实施例是本申请一部分实施例,而不是全部的实施例。针对本申请中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本申请保护的范围。
本申请实施例可以应用于各种通信系统,例如:全球移动通讯(Global System of Mobile communication,GSM)系统、码分多址(Code Division Multiple Access,CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access,WCDMA)系统、通用分组无线业务(General Packet Radio Service,GPRS)、长期演进(Long Term Evolution,LTE)系统、先进的长期演进(Advanced long term evolution,LTE-A)系统、新空口(New Radio,NR)系统、NR系统的演进系统、免授权频谱上的LTE(LTE-based access to unlicensed spectrum,LTE-U)系统、免授权频谱上的NR(NR-based access to unlicensed spectrum,NR-U)系统、通用移动通信系统(Universal Mobile Telecommunication System,UMTS)、无线局域网(Wireless Local Area Networks,WLAN)、无线保真(Wireless Fidelity,WiFi)、下一代通信系统或其他通信系统等。
通常来说,传统的通信系统支持的连接数有限,也易于实现,然而,随着通信技术的发展,移动通信系统将不仅支持传统的通信,还将支持例如,设备到设备(Device to Device,D2D)通信,机器到机器(Machine to Machine,M2M)通信,机器类型通信(Machine Type Communication,MTC),以及车辆间(Vehicle to Vehicle,V2V)通信等,本申请实施例也可以应用于这些通信系统。
可选地,本申请实施例中的通信系统可以应用于载波聚合(Carrier Aggregation,CA)场景,也可以应用于双连接(Dual Connectivity,DC)场景,还可以应用于独立(Standalone,SA)布网场景。
本申请实施例对应用的频谱并不限定。例如,本申请实施例可以应用于授权频谱,也可以应用于免授权频谱。
示例性的,本申请实施例应用的通信系统100如图1所示。该通信系统100可以包括网络设备110,网络设备110可以是与终端设备120(或称为通信终端、终端)通信的设备。网络设备110可以为特定的地理区域提供通信覆盖,并且可以与位于该覆盖区域内的终端设备进行通信。
图1示例性地示出了一个网络设备和两个终端设备,可选地,该通信系统100可以包括多个网络设备并且每个网络设备的覆盖范围内可以包括其它数量的终端设备,本申请实施例对此不做限定。
可选地,该通信系统100还可以包括网络控制器、移动管理实体等其他网络实体,本申请实施例对此不作限定。
应理解,本申请实施例中网络/系统中具有通信功能的设备可称为通信设备。以图1示出的通信系统100为例,通信设备可包括具有通信功能的网络设备110和终端设备120,网络设备110和终端设备120可以为上文所述的具体设备,此处不再赘述;通信设备还可包括通信系统100中的其他设备,例如网络控制器、移动管理实体等其他网络实体,本申请实施例中对此不做限定。
应理解,本文中术语“系统”和“网络”在本文中常被可互换使用。本文中术语“和/或”,仅仅是一种描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B这三种情况。另外,本文中字符“/”,一般表示前后关联对象是一种“或”的关系。
本申请实施例结合终端设备和网络设备描述了各个实施例,其中:终端设备也可以称为用户设备(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等。终端设备可以是WLAN中的站点(STAION,ST),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)设备、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、可穿戴设备以及下一代通信系统,例如,NR网络中的终端设备或者未来演进的公共陆地移动网络 (Public Land Mobile Network,PLMN)网络中的终端设备等。
作为示例而非限定,在本申请实施例中,该终端设备还可以是可穿戴设备。可穿戴设备也可以称为穿戴式智能设备,是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称,如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上,或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备,更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能,例如:智能手表或智能眼镜等,以及只专注于某一类应用功能,需要和其它设备如智能手机配合使用,如各类进行体征监测的智能手环、智能首饰等。
网络设备可以是用于与移动设备通信的设备,网络设备可以是WLAN中的接入点(Access Point,AP),GSM或CDMA中的基站(Base Transceiver Station,BTS),也可以是WCDMA中的基站(NodeB,NB),还可以是LTE中的演进型基站(Evolutional Node B,eNB或eNodeB),或者中继站或接入点,或者车载设备、可穿戴设备以及NR网络中的网络设备或者基站(gNB)或者未来演进的PLMN网络中的网络设备等。
在本申请实施例中,网络设备为小区提供服务,终端设备通过该小区使用的传输资源(例如,频域资源,或者说,频谱资源)与网络设备进行通信,该小区可以是网络设备(例如基站)对应的小区,小区可以属于宏基站,也可以属于小小区(Small cell)对应的基站,这里的小小区可以包括:城市小区(Metro cell)、微小区(Micro cell)、微微小区(Pico cell)、毫微微小区(Femto cell)等,这些小小区具有覆盖范围小、发射功率低的特点,适用于提供高速率的数据传输服务。
在小区搜索过程之后,终端设备已经与小区取得了下行同步,因此终端设备可以接收下行数据。但终端设备只有与小区取得上行同步,才能进行上行传输。终端设备可以通过随机接入过程(Random Access Procedure)与小区建立连接并取得上行同步。为了便于理解本申请实施例的方案,下面将结合图2简单介绍随机接入过程。
随机接入过程通常可以由以下事件触发:
(1)初始接入(Initial Access)。
例如,终端设备需要从无线资源控制(Radio Resource Control,RRC)空闲态(RRC_IDLE态)进入RRC连接态(RRC_CONNECTED),此时,该终端设备可以触发初始接入。
(2)RRC连接重建过程(RRC Connection Re-establishment procedure)。
(3)切换(Handover)。
此时,终端设备处于连接态,需要与新的小区建立上行同步。
(4)RRC连接态下,下行数据或上行数据到达时,上行处于“不同步”状态(DL or UL data arrival during RRC_CONNECTED when UL synchronisation status is"non-synchronised")。
(5)RRC连接态下,上行数据到达时,没有可用的物理上行控制信道(Physical Uplink Control Channel,PUCCH)资源用于调度请求(Scheduling Request,SR)传输(UL data arrival during RRC_CONNECTED when there are no PUCCH resources for SR available)。
(6)SR失败(SR failure)。
(7)RRC在同步配置时的请求(Request by RRC upon synchronous reconfiguration)。
(8)终端设备从RRC非激活态过渡(Transition from RRC_INACTIVE)。
(9)在SCell添加时建立时间对齐(To establish time alignment at SCell addition)。
(10)终端设备请求其他系统信息(Other System Information,OSI)。
(11)终端设备需要进行波束(Beam)失败的恢复(Beam failure recovery)。
在NR系统中,可以支持两种随机接入方式:基于竞争的随机接入方式和基于非竞争的随机接入方式。下面简单描述基于竞争的四步随机接入,如图2所示,四步随机接入包括:
步骤1,终端设备向网络设备发送随机接入前导码(Preamble,也即Msg 1)。
其中,随机接入前导码也可以称为前导码、随机接入前导码序列、前导码序列等。
具体而言,终端设备可以选择物理随机接入信道(Physical Random Access Channel,PRACH)资源,PRACH资源可以包括时域资源、频域资源和码域资源。网络设备通过广播系统信息块(System Information Block,SIB)1向终端设备发送随机接入相关参数,其中随机接入公共配置信息元素(RACH-ConfigCommon IE)中的针对同步信号块(Synchronization Signal Block,SSB)的参考信号接收功率(Reference Signal Receiving Power,RSRP)门限值(rsrp-ThresholdSSB)用于终端设备进行SSB选择,终端设备将每个SSB下的RSRP测量结果与rsrp-ThresholdSSB进行对比,选择测量值高于所配置门限值的SSB进行接入,若没有满足配置门限值的SSB,则从全部SSB中随机选择一个进行接入。每个SSB对应一组随机接入前导码(Preamble)资源和随机接入时机(RACH Occasion,RO) 资源,终端设备从选定的SSB中用于基于竞争的随机接入资源中进行随机选择,将Preamble索引(PREAMBLE_INDEX)设置为选定的随机接入Preamble。网络设备可以根据Preamble估计其与终端设备之间的传输时延并以此校准上行定时(timing),以及可以大体确定终端设备传输Msg 3所需要的资源大小。为了让网络设备可以更准确的了解到待传输的Msg 3的大小以分配合适的上行资源,将Preamble分为Preamble组(group)A和Preamble group B,若随机接入资源中存在Preamble group B,终端设备可以根据Msg 3的大小以及路损(pathloss)对Preamble group进行选择。
步骤2,网络设备向终端设备发送随机接入响应(Random Access Response,RAR,也即Msg 2)
终端设备向网络设备发送Preamble后,可以开启一个随机接入响应窗口(ra-ResponseWindow),在该ra-ResponseWindow内根据随机访问无线网络临时标识符(Random Access Radio Network Temporary Identifier,RA-RNTI)检测对应的物理下行控制信道(Physical Downlink Control Channel,PDCCH)。若终端设备检测到RA-RNTI加扰的PDCCH后,可以获得该PDCCH调度的物理下行共享信道(Physical Downlink Shared Channel,PDSCH)。其中,该PDSCH中包括Preamble对应的RAR。
RA-RNTI根据发送Preamble的PRACH的时频位置计算得到,因此如果多个终端设备在同一个RO上发送Preamble,则对应的RAR复用在同一个RAR媒体接入控制协议数据单元(Media Access Control Protocol Data Unit,MAC PDU)中。若终端成功接收到与发送Preamble的RO资源对应的RA-RNTI加扰的PDCCH,并且RAR中包含一个MAC子PDU(subPDU)所携带的随机访问序列标识符(Random Access Preamble Identifier,RAPID)与上述Msg 1中选择的PREAMBLE_INDEX相对应,则RAR接收成功,终端可解码得到定时提前命令(Timing Advance Command,TAC),上行授权资源(UL Grant)和临时小区RNTI(Temporary Cell Radio Network Temporary Identity,TC-RNTI),进行Msg 3。
若在ra-ResponseWindow运行期间没有接收到与发送Preamble的RO资源对应的RA-RNTI加扰的PDCCH,或接收到了RA-RNTI加扰的PDCCH,但RAR中不包含与PREAMBLE_INDEX对应的MAC subPDU,上述两种情况出现时则认为RAR接收失败,此时,若Preamble的传输次数没有超过网络配置的最大传输次数(preambleTransMax),终端设备需要对Msg 1进行重传,若Preamble的传输次数超过了网络配置的最大传输次数(preambleTransMax),终端设备向上层上报随机接入问题。
步骤3,终端设备发送Msg 3。
终端设备在收到RAR消息后,判断该RAR是否为属于自己的RAR消息,例如终端设备可以利用前导码索引进行核对,在确定是属于自己的RAR消息后,可以在RRC层产生Msg 3,并向网络设备发送Msg 3,其中需要携带终端设备的标识信息等。
其中,Msg 3主要用于通知网络设备该随机接入的触发事件。针对不同的随机接入触发事件,终端设备在步骤3中发送的Msg 3可以包括不同的内容。
例如,对于初始接入的场景,Msg 3可以包括RRC层生成的RRC连接请求消息(RRC Setup Request)。此外,Msg 3还可以携带例如终端设备的5G-服务临时移动用户标识(Serving-Temporary Mobile Subscriber Identity,S-TMSI)或随机数等。
又例如,对于RRC连接重建场景,Msg 3可以包括RRC层生成的RRC连接重建请求消息(RRC Reestabilshment Request)。此外,Msg 3还可以携带例如小区无线网络临时标识(Cell Radio Network Temporary Identifier,C-RNTI)等。
又例如,对于切换场景,Msg 3可以包括RRC层生成的RRC切换确认消息(RRC Handover Confirm),其携带终端设备的C-RNTI。此外,Msg 3还可携带例如缓冲状态报告(Buffer Status Report,BSR)等信息。对于其它触发事件例如上/下行数据到达的场景,Msg 3至少可以包括终端设备的C-RNTI。
步骤4,网络设备向终端设备发送冲突解决消息(contention resolution),即Msg 4。
网络设备向终端设备发送Msg 4,终端设备正确接收Msg 4完成竞争解决(Contention Resolution)。例如在RRC连接建立过程中,Msg 4中可以携带RRC连接建立消息。
由于步骤3中的终端设备可以在Msg 3中携带自己唯一的标识,从而网络设备在竞争解决机制中,会在Msg4中携带终端设备的唯一标识以指定竞争中胜出的终端设备。而其它没有在竞争解决中胜出的终端设备将重新发起随机接入。
应理解,在本申请实施例中,竞争冲突解决可以有两种方式:
方式一、如果终端设备在Msg 3携带了C-RNTI,则Msg 4可以用C-RNTI加扰的PDCCH调度。
方式二、如果终端设备没有在Msg 3中携带C-RNTI,比如是初始接入,则Msg 4可以用TC-RNTI加扰的PDCCH调度。此时,竞争冲突的解决可以是通过终端设备接收Msg 4的PDSCH,获得冲突解决ID,通过匹配该冲突解决ID与Msg 3中中的公共控制信道(Common control channel,CCCH) 服务数据单元(Service Data Unit,SDU)来判断是否解决冲突。
四步随机接入的时延比较大,对于5G中的低时延高可靠场景是不合适的。考虑到低时延高可靠相关业务的特点,提出了两步随机接入的方案。两步随机接入中的Msg A包含在PRACH上传输的Preamble和在物理上行共享信道(Physical Uplink Shared Channel,PUSCH)上传输的负载信息,在Msg A传输后,终端设备在配置的窗口内监听网络侧的响应,如果收到网络下发的竞争冲突解决成功的指示,则终端结束随机接入过程,如图3所示;如果在Msg B中收到回退指示,则终端设备执行Msg 3的传输并监听竞争冲突解决结果,如图4所示。如果在Msg 3传输之后竞争解决不成功,终端继续Msg A的传输。
当UL BWP上同时配置了两步随机接入资源和四步随机接入资源时,UE需要进行随机接入类型选择,假设UE测量得到的RSRP高于网络所配置的阈值,那么UE进入两步随机接入流程。网络可以给UE配置Msg A的最大传输次数‘N’,若UE在尝试了‘N’次两步随机接入后仍未接入成功,那么UE将回退至或者切换至四步随机接入继续进行接入尝试。
然而,在上行BWP上配置了两步随机接入资源和四步随机接入资源的情况下,终端设备如何选择随机接入方式,是否一定需要从两步随机接入回退至或者切换至四步随机接入并未明确。
以下详细阐述本申请针对上述技术问题而设计的随机接入方案。
图5是根据本申请实施例的无线通信方法200的示意性流程图,如图5所示,该方法200可以包括如下内容:
S210,在上行BWP上配置了两步随机接入资源和四步随机接入资源的情况下,终端设备确定是否允许从两步随机接入切换至四步随机接入。
在本申请实施例中,在上行BWP上配置了两步随机接入资源和四步随机接入资源的情况下,一些情况下,允许从两步随机接入切换至四步随机接入;在另一些情况下,不允许从两步随机接入切换至四步随机接入。
需要说明的是,在上行BWP上配置了两步随机接入资源和四步随机接入资源的情况下,可以允许终端设备在该上行BWP的两步随机接入资源上进行两步随机接入,以及在该上行BWP的四步随机接入资源上进行四步随机接入,终端设备可以现实两步随机接入和四步随机接入。
在本申请实施例中,终端设备优先进行两步随机接入。
可选地,在本申请实施例中,上述步骤S210具体可以是:
该终端设备根据第一信息确定是否允许从两步随机接入切换至四步随机接入;
其中,该第一信息包括以下中的至少一种:
是否允许从两步随机接入切换至四步随机接入的切换指示信息,
两步随机接入的第一条消息的负载大小(payload size)与至少一个随机接入前导码组对应的四步随机接入的第三条消息的大小(size)是否匹配,
两步随机接入的第一条消息的最大传输次数的取值。
需要说明的是,两步随机接入的第一条消息可以是上述的Msg A,四步随机接入的第三条消息可以是上述的Msg 3。
可选地,该切换指示信息为网络设备在两步随机接入参数配置中配置的。
例如,该切换指示信息为切换允许指示(SwitchingAllowed),SwitchingAllowed配置为假(false)表示不允许从两步随机接入切换至四步随机接入,SwitchingAllowed配置为真(ture)表示允许从两步随机接入切换至四步随机接入。
可选地,两步随机接入的第一条消息的最大传输次数为网络设备在两步随机接入参数配置中配置的。
可选地,该至少一个随机接入前导码组为网络设备在四步随机接入参数配置中配置的。可选地,网络设备也会在两步随机接入参数配置中配置该至少一个随机接入前导码组。
例如,网络设备在两步随机接入参数配置中配置Preamble group A和Preamble group B,同样,网络设备也会在四步随机接入参数配置中配置Preamble group A和Preamble group B。具体地,终端设备在两步随机接入的过程中从Preamble group A中选择Preamble,在从两步随机接入切换至四步随机接入之后,终端设备也会从Preamble group A中选择Preamble进行四步随机接入。
在本申请实施例中,两步随机接入的第一条消息的负载大小(Msg A payload size)与至少一个随机接入前导码组对应的四步随机接入的第三条消息的大小(ra-Msg3Size)是否匹配,可以通过如下情况1和情况2作进一步地理解。
情况1:网络设备没有在四步随机接入资源中配置Group B,即仅在四步随机接入资源中配置Group A,若Msg A payload size<=所支持的最小Msg 3 size(56比特),则size匹配。
情况2:网络设备在四步随机接入资源中同时配置了Group A和Group B以及size阈值ra-Msg3SizeGroupA;
若MsgA payload size<=ra-Msg3SizeGroupA,则与Group A对应的Msg3size匹配;
若MsgA payload size<=ra-Msg3SizeGroupB,则与Group B对应的Msg3size匹配;
否则,则认为没有匹配。
可选地,作为示例1,该终端设备可以基于该第一信息中的“是否允许从两步随机接入切换至四步随机接入的切换指示信息,以及两步随机接入的第一条消息的负载大小与至少一个随机接入前导码组对应的四步随机接入的第三条消息的大小是否匹配”,确定是否允许从两步随机接入切换至四步随机接入。
具体地,在示例1中,该终端设备根据第一信息确定是否允许从两步随机接入切换至四步随机接入,包括以下中的一种:
若该切换指示信息指示不允许从两步随机接入切换至四步随机接入,该终端设备确定不允许从两步随机接入切换至四步随机接入;
若该切换指示信息指示允许从两步随机接入切换至四步随机接入,且两步随机接入的第一条消息的负载大小与该至少一个随机接入前导码组中的部分或者全部随机接入前导码组对应的四步随机接入的第三条消息的大小匹配,该终端设备确定允许从两步随机接入切换至四步随机接入;
若该切换指示信息指示允许从两步随机接入切换至四步随机接入,且两步随机接入的第一条消息的负载大小与该至少一个随机接入前导码组中的全部随机接入前导码组对应的四步随机接入的第三条消息的大小均不匹配,该终端设备确定不允许从两步随机接入切换至四步随机接入。
可选地,作为示例2,该终端设备可以基于该第一信息中的“两步随机接入的第一条消息的负载大小与至少一个随机接入前导码组对应的四步随机接入的第三条消息的大小是否匹配”,确定是否允许从两步随机接入切换至四步随机接入。
具体地,在示例2中,该终端设备根据第一信息确定是否允许从两步随机接入切换至四步随机接入,包括以下中的一种:
若两步随机接入的第一条消息的负载大小与该至少一个随机接入前导码组中的部分或者全部随机接入前导码组对应的四步随机接入的第三条消息的大小匹配,该终端设备确定允许从两步随机接入切换至四步随机接入;
若两步随机接入的第一条消息的负载大小与该至少一个随机接入前导码组中的全部随机接入前导码组对应的四步随机接入的第三条消息的大小均不匹配,该终端设备确定不允许从两步随机接入切换至四步随机接入。
可选地,作为示例3,该终端设备可以基于该第一信息中的“两步随机接入的第一条消息的最大传输次数的取值,以及两步随机接入的第一条消息的负载大小与至少一个随机接入前导码组对应的四步随机接入的第三条消息的大小是否匹配”,确定是否允许从两步随机接入切换至四步随机接入。
具体地,在示例3中,该终端设备根据第一信息确定是否允许从两步随机接入切换至四步随机接入,包括以下中的一种:
若两步随机接入的第一条消息的最大传输次数的取值为无限值,该终端设备确定不允许从两步随机接入切换至四步随机接入;
若两步随机接入的第一条消息的最大传输次数的取值为有限值,且两步随机接入的第一条消息的负载大小与该至少一个随机接入前导码组中的部分或者全部随机接入前导码组对应的四步随机接入的第三条消息的大小匹配,该终端设备确定允许从两步随机接入切换至四步随机接入;
若两步随机接入的第一条消息的最大传输次数的取值为有限值,且两步随机接入的第一条消息的负载大小与该至少一个随机接入前导码组中的全部随机接入前导码组对应的四步随机接入的第三条消息的大小均不匹配,该终端设备确定不允许从两步随机接入切换至四步随机接入。
可选地,对于上述示例1和示例2,若该终端设备确定不允许从两步随机接入切换至四步随机接入,该终端设备在尝试了N次两步随机接入之后,进行随机接入问题上报,其中,N为两步随机接入的第一条消息的最大传输次数。
可选地,对于上述示例3,若该终端设备确定不允许从两步随机接入切换至四步随机接入,该终端设备在尝试了M次两步随机接入之后,进行随机接入问题上报,其中,M为两步随机接入中触发问题上报的最大尝试次数。
可选地,M为网络设备在两步随机接入参数配置中配置的。
可选地,对于上述示例1至示例3,若该终端设备确定允许从两步随机接入切换至四步随机接入,该终端设备在尝试了N次两步随机接入之后,从两步随机接入切换至四步随机接入,其中,N为两步 随机接入的第一条消息的最大传输次数。
可选地,在该终端设备从两步随机接入切换至四步随机接入之后,该终端设备从第一随机接入前导码组中选择用于四步随机接入的随机接入前导码,其中,该第一随机接入前导码组为该至少一个随机接入前导码组中对应的四步随机接入的第三条消息的大小与两步随机接入的第一条消息的负载大小匹配的一个随机接入前导码组。
因此,在本申请实施例中,在上行BWP上同时配置了两步随机接入资源和四步随机接入资源的情况下,终端设备可以确定是否允许从两步随机接入切换至四步随机接入,实现了随机接入的灵活性。
以下以具体实施例详述上述无线通信方法200。
实施例1,网络设备在两步随机接入参数信息元素(Information element,IE)中为终端设备配置SwitchingAllowed和Msg A最大传输次数N,在四步随机接入参数IE中为终端设备指示用于四步随机接入的Preamble group,假设存在Preamble group A和Preamble group B。由两步随机接入切换至四步随机接入的判断流程可以如图6所示。
1.若切换允许指示为假(SwitchingAllowed=false),
终端设备(UE)在尝试了N次两步随机接入之后,进行随机接入问题上报。
2.若切换允许指示为真(SwitchingAllowed=true),
A.若Msg A负载大小与Preamble group A对应的Msg 3大小匹配,
终端设备(UE)在尝试了N次两步随机接入后切换至四步随机接入,并从Preamble group A中选择用于四步随机接入的Preamble。
B.若Msg A负载大小与Preamble group B对应的Msg3大小匹配,
终端设备(UE)在尝试了N次两步随机接入后切换至四步随机接入,并从Preamble group B中选择用于四步随机接入的Preamble。
C.若Msg A负载大小与Preamble group A和Preamble group B对应的Msg 3size均不匹配,
终端设备(UE)在尝试了N次两步随机接入后不可切换到四步随机接入,而是进行随机接入问题上报。
在实施例1中,在两步随机接入配置中引入参数显示指示切换是否被允许,如命名为SwitchingAllowed。SwitchingAllowed配置为false表示不允许切换,SwitchingAllowed配置为ture表示允许切换。在允许切换的情况下,终端设备根据Msg A payload size与Preamble group所对应的Msg 3size之间的关系进一步判断切换是否可以发生。
实施例2,网络设备在两步随机接入参数IE中为终端设备配置Msg A最大传输次数N,在四步随机接入参数IE中为终端设备指示用于四步随机接入的Preamble group,假设存在Preamble group A和Preamble group B。由两步随机接入切换至四步随机接入的判断流程可以如图7所示。
1.若Msg A负载大小与Preamble group A和Preamble group B对应的Msg 3size均不匹配,
终端设备在尝试了N次两步随机接入后,进行随机接入问题上报。
2.若Msg A负载大小与Preamble group A或Preamble group B对应的Msg 3size匹配,
终端设备在尝试了N次两步随机接入后切换至四步随机接入,并从Preamble group A或Preamble group B中选择用于四步随机接入的Preamble。
在实施例2中,终端设备通过Msg A payload size与Preamble group对应的Msg 3size是否与匹配隐式推断切换是否允许且可以发生。与实施例1相比,实施例2不需要网络设备明确指示切换是否可以发生,节省信令开销,但同时限制了网络设备在配置传输MsgA payload的所使用的上行资源的灵活性,以实现隐式指示是否可以进行RACH类型切换的目的。
实施例3,网络设备在两步随机接入参数IE中为终端设备配置问题上报最大尝试次数M和Msg A最大传输次数N,在四步随机接入参数IE中为终端设备指示用于四步随机接入的Preamble group,假设存在Preamble group A和Preamble group B。由两步随机接入切换至四步随机接入的判断流程可以如图8所示。
1.若未配置Msg A最大传输次数N,或Msg A最大传输次数N配置为无限值或者无穷大值,
终端设备在尝试了M次两步随机接入后,进行随机接入问题上报。
2.若配置Msg A最大传输次数N且N为有限值,
A.若Msg A payload size与Preamble group A对应的Msg 3size匹配,
终端设备在尝试了N次两步随机接入后切换至四步随机接入,从Preamble group A中选择用于四步随机接入的Preamble。
B.若Msg A payload size与Preamble group B对应的Msg 3size匹配,
终端设备在尝试了N次两步随机接入后切换到四步随机接入,从Preamble group B中选择用于四 步随机接入的Preamble。
C.若Msg A payload size与Preamble group A和Preamble group B对应的Msg 3size均不匹配,
终端设备在尝试了N次两步随机接入后不可切换到四步随机接入,直至Msg A传输次数达到M次后进行随机接入问题上报。
在实施例3中,终端设备根据是否配置了Msg A最大传输次数N及N是否为有限值判断是否允许切换。同时在两步随机接入配置中引入参数M指示两步随机接入问题上报的最大尝试次数。在允许切换的情况下,终端设备通过Msg A payload size与Preamble group所对应的Msg 3 size之间的关系进一步判断切换是否可以发生。
上文结合图5至图8,从终端设备的角度详细描述了根据本申请实施例的无线通信方法,下文结合图9,从网络设备的角度详细描述根据本申请另一实施例的无线通信方法。应理解,终端设备侧的描述与网络设备侧的描述相互对应,相似的描述可以参见上文,为避免重复,此处不再赘述。
图9是根据本申请实施例的无线通信方法300的示意性流程图,如图9所示,该方法300可以包括如下内容:
S310,在上行BWP上配置了两步随机接入资源和四步随机接入资源的情况下,网络设备向终端设备发送用于配置两步随机接入参数的第一配置信息和用于配置四步随机接入参数的第二配置信息,其中,该第一配置信息和该第二配置信息用于该终端设备确定是否允许从两步随机接入切换至四步随机接入。
可选地,该第一配置信息包括以下中的至少一种:
是否允许从两步随机接入切换至四步随机接入的切换指示信息,
两步随机接入的第一条消息的最大传输次数,
用于两步随机接入的至少一个随机接入前导码组。
可选地,该第一配置信息包括以下中的至少一种:
两步随机接入中触发问题上报的最大尝试次数,
两步随机接入的第一条消息的最大传输次数,
用于两步随机接入的至少一个随机接入前导码组。
可选地,该第二配置信息至少包括用于四步随机接入的至少一个随机接入前导码组。
因此,在本申请实施例中,在上行BWP上同时配置了两步随机接入资源和四步随机接入资源的情况下,终端设备可以基于网络设备发送的用于配置两步随机接入参数的第一配置信息和用于配置四步随机接入参数的第二配置信息,确定是否允许从两步随机接入切换至四步随机接入,实现了随机接入的灵活性。
上文结合图5至图9,详细描述了本申请的方法实施例,下文结合图10至图14,详细描述本申请的装置实施例,应理解,装置实施例与方法实施例相互对应,类似的描述可以参照方法实施例。
图10示出了根据本申请实施例的终端设备400的示意性框图。如图10所示,该终端设备400包括:
处理单元410,其中,
在上行BWP上配置了两步随机接入资源和四步随机接入资源的情况下,该处理单元410用于确定是否允许从两步随机接入切换至四步随机接入。
可选地,该处理单元410具体用于:
根据第一信息确定是否允许从两步随机接入切换至四步随机接入;
其中,该第一信息包括以下中的至少一种:
是否允许从两步随机接入切换至四步随机接入的切换指示信息,
两步随机接入的第一条消息的负载大小与至少一个随机接入前导码组对应的四步随机接入的第三条消息的大小是否匹配,
两步随机接入的第一条消息的最大传输次数的取值。
可选地,该处理单元410根据第一信息确定是否允许从两步随机接入切换至四步随机接入,包括以下中的一种:
若该切换指示信息指示不允许从两步随机接入切换至四步随机接入,该处理单元410确定不允许从两步随机接入切换至四步随机接入;
若该切换指示信息指示允许从两步随机接入切换至四步随机接入,且两步随机接入的第一条消息的负载大小与该至少一个随机接入前导码组中的部分或者全部随机接入前导码组对应的四步随机接入的第三条消息的大小匹配,该处理单元410确定允许从两步随机接入切换至四步随机接入;
若该切换指示信息指示允许从两步随机接入切换至四步随机接入,且两步随机接入的第一条消息 的负载大小与该至少一个随机接入前导码组中的全部随机接入前导码组对应的四步随机接入的第三条消息的大小均不匹配,该处理单元410确定不允许从两步随机接入切换至四步随机接入。
可选地,该处理单元410根据第一信息确定是否允许从两步随机接入切换至四步随机接入,包括以下中的一种:
若两步随机接入的第一条消息的负载大小与该至少一个随机接入前导码组中的部分或者全部随机接入前导码组对应的四步随机接入的第三条消息的大小匹配,该处理单元410确定允许从两步随机接入切换至四步随机接入;
若两步随机接入的第一条消息的负载大小与该至少一个随机接入前导码组中的全部随机接入前导码组对应的四步随机接入的第三条消息的大小均不匹配,该处理单元410确定不允许从两步随机接入切换至四步随机接入。
可选地,该处理单元410根据第一信息确定是否允许从两步随机接入切换至四步随机接入,包括以下中的一种:
若两步随机接入的第一条消息的最大传输次数的取值为无限值,该处理单元410确定不允许从两步随机接入切换至四步随机接入;
若两步随机接入的第一条消息的最大传输次数的取值为有限值,且两步随机接入的第一条消息的负载大小与该至少一个随机接入前导码组中的部分或者全部随机接入前导码组对应的四步随机接入的第三条消息的大小匹配,该处理单元410确定允许从两步随机接入切换至四步随机接入;
若两步随机接入的第一条消息的最大传输次数的取值为有限值,且两步随机接入的第一条消息的负载大小与该至少一个随机接入前导码组中的全部随机接入前导码组对应的四步随机接入的第三条消息的大小均不匹配,该处理单元410确定不允许从两步随机接入切换至四步随机接入。
可选地,该终端设备还包括:通信单元,
若该终端设备确定不允许从两步随机接入切换至四步随机接入,该终端设备在尝试了N次两步随机接入之后,该通信单元用于进行随机接入问题上报,其中,N为两步随机接入的第一条消息的最大传输次数。
可选地,该终端设备还包括:通信单元,
若该终端设备确定不允许从两步随机接入切换至四步随机接入,该终端设备在尝试了M次两步随机接入之后,该通信单元用于进行随机接入问题上报,其中,M为两步随机接入中触发问题上报的最大尝试次数。
可选地,M为网络设备在两步随机接入参数配置中配置的。
可选地,若该终端设备确定允许从两步随机接入切换至四步随机接入,该终端设备在尝试了N次两步随机接入之后,该处理单元410还用于从两步随机接入切换至四步随机接入,其中,N为两步随机接入的第一条消息的最大传输次数。
可选地,该处理单元410还用于从第一随机接入前导码组中选择用于四步随机接入的随机接入前导码,其中,该第一随机接入前导码组为该至少一个随机接入前导码组中对应的四步随机接入的第三条消息的大小与两步随机接入的第一条消息的负载大小匹配的一个随机接入前导码组。
可选地,该切换指示信息和/或两步随机接入的第一条消息的最大传输次数为网络设备在两步随机接入参数配置中配置的。
可选地,该至少一个随机接入前导码组为网络设备在四步随机接入参数配置中配置的。
可选地,在一些实施例中,上述通信单元可以是通信接口或收发器,或者是通信芯片或者片上系统的输入输出接口。上述处理单元可以是一个或多个处理器。
应理解,根据本申请实施例的终端设备400可对应于本申请方法实施例中的终端设备,并且终端设备400中的各个单元的上述和其它操作和/或功能分别为了实现图5所示方法200中终端设备的相应流程,为了简洁,在此不再赘述。
图11示出了根据本申请实施例的网络设备500的示意性框图。如图11所示,该网络设备500包括:
通信单元510,其中,
在上行BWP上配置了两步随机接入资源和四步随机接入资源的情况下,该通信单元510用于向终端设备发送用于配置两步随机接入参数的第一配置信息和用于配置四步随机接入参数的第二配置信息,其中,该第一配置信息和该第二配置信息用于该终端设备确定是否允许从两步随机接入切换至四步随机接入。
可选地,该第一配置信息包括以下中的至少一种:
是否允许从两步随机接入切换至四步随机接入的切换指示信息,
两步随机接入的第一条消息的最大传输次数,
用于两步随机接入的至少一个随机接入前导码组。
可选地,该第一配置信息包括以下中的至少一种:
两步随机接入中触发问题上报的最大尝试次数,
两步随机接入的第一条消息的最大传输次数,
用于两步随机接入的至少一个随机接入前导码组。
可选地,该第二配置信息至少包括用于四步随机接入的至少一个随机接入前导码组。
可选地,在一些实施例中,上述通信单元可以是通信接口或收发器,或者是通信芯片或者片上系统的输入输出接口。
应理解,根据本申请实施例的网络设备500可对应于本申请方法实施例中的网络设备,并且网络设备500中的各个单元的上述和其它操作和/或功能分别为了实现图9所示方法300中网络设备的相应流程,为了简洁,在此不再赘述。
图12是本申请实施例提供的一种通信设备600示意性结构图。图12所示的通信设备600包括处理器610,处理器610可以从存储器中调用并运行计算机程序,以实现本申请实施例中的方法。
可选地,如图12所示,通信设备600还可以包括存储器620。其中,处理器610可以从存储器620中调用并运行计算机程序,以实现本申请实施例中的方法。
其中,存储器620可以是独立于处理器610的一个单独的器件,也可以集成在处理器610中。
可选地,如图12所示,通信设备600还可以包括收发器630,处理器610可以控制该收发器630与其他设备进行通信,具体地,可以向其他设备发送信息或数据,或接收其他设备发送的信息或数据。
其中,收发器630可以包括发射机和接收机。收发器630还可以进一步包括天线,天线的数量可以为一个或多个。
可选地,该通信设备600具体可为本申请实施例的网络设备,并且该通信设备600可以实现本申请实施例的各个方法中由网络设备实现的相应流程,为了简洁,在此不再赘述。
可选地,该通信设备600具体可为本申请实施例的移动终端/终端设备,并且该通信设备600可以实现本申请实施例的各个方法中由移动终端/终端设备实现的相应流程,为了简洁,在此不再赘述。
图13是本申请实施例的装置的示意性结构图。图13所示的装置700包括处理器710,处理器710可以从存储器中调用并运行计算机程序,以实现本申请实施例中的方法。
可选地,如图13所示,装置700还可以包括存储器720。其中,处理器710可以从存储器720中调用并运行计算机程序,以实现本申请实施例中的方法。
其中,存储器720可以是独立于处理器710的一个单独的器件,也可以集成在处理器710中。
可选地,该装置700还可以包括输入接口730。其中,处理器710可以控制该输入接口730与其他设备或芯片进行通信,具体地,可以获取其他设备或芯片发送的信息或数据。
可选地,该装置700还可以包括输出接口740。其中,处理器710可以控制该输出接口740与其他设备或芯片进行通信,具体地,可以向其他设备或芯片输出信息或数据。
可选地,该装置可应用于本申请实施例中的网络设备,并且该装置可以实现本申请实施例的各个方法中由网络设备实现的相应流程,为了简洁,在此不再赘述。
可选地,该装置可应用于本申请实施例中的移动终端/终端设备,并且该装置可以实现本申请实施例的各个方法中由移动终端/终端设备实现的相应流程,为了简洁,在此不再赘述。
可选地,本申请实施例提到的装置也可以是芯片。例如可以是系统级芯片,系统芯片,芯片系统或片上系统芯片等。
图14是本申请实施例提供的一种通信系统800的示意性框图。如图14所示,该通信系统800包括终端设备810和网络设备820。
其中,该终端设备810可以用于实现上述方法中由终端设备实现的相应的功能,以及该网络设备820可以用于实现上述方法中由网络设备实现的相应的功能为了简洁,在此不再赘述。
应理解,本申请实施例的处理器可能是一种集成电路芯片,具有信号的处理能力。在实现过程中,上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(Digital Signal Processor,DSP)、专用集成电路(Application Specific Integrated Circuit,ASIC)、现成可编程门阵列(Field Programmable Gate Array,FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成,或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器,闪存、只读存储器, 可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器,处理器读取存储器中的信息,结合其硬件完成上述方法的步骤。
可以理解,本申请实施例中的存储器可以是易失性存储器或非易失性存储器,或可包括易失性和非易失性存储器两者。其中,非易失性存储器可以是只读存储器(Read-Only Memory,ROM)、可编程只读存储器(Programmable ROM,PROM)、可擦除可编程只读存储器(Erasable PROM,EPROM)、电可擦除可编程只读存储器(Electrically EPROM,EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory,RAM),其用作外部高速缓存。通过示例性但不是限制性说明,许多形式的RAM可用,例如静态随机存取存储器(Static RAM,SRAM)、动态随机存取存储器(Dynamic RAM,DRAM)、同步动态随机存取存储器(Synchronous DRAM,SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM,DDR SDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM,ESDRAM)、同步连接动态随机存取存储器(Synchlink DRAM,SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM,DR RAM)。应注意,本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
应理解,上述存储器为示例性但不是限制性说明,例如,本申请实施例中的存储器还可以是静态随机存取存储器(static RAM,SRAM)、动态随机存取存储器(dynamic RAM,DRAM)、同步动态随机存取存储器(synchronous DRAM,SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM,DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM,ESDRAM)、同步连接动态随机存取存储器(synch link DRAM,SLDRAM)以及直接内存总线随机存取存储器(Direct Rambus RAM,DR RAM)等等。也就是说,本申请实施例中的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
本申请实施例还提供了一种计算机可读存储介质,用于存储计算机程序。
可选的,该计算机可读存储介质可应用于本申请实施例中的网络设备,并且该计算机程序使得计算机执行本申请实施例的各个方法中由网络设备实现的相应流程,为了简洁,在此不再赘述。
可选地,该计算机可读存储介质可应用于本申请实施例中的移动终端/终端设备,并且该计算机程序使得计算机执行本申请实施例的各个方法中由移动终端/终端设备实现的相应流程,为了简洁,在此不再赘述。
本申请实施例还提供了一种计算机程序产品,包括计算机程序指令。
可选的,该计算机程序产品可应用于本申请实施例中的网络设备,并且该计算机程序指令使得计算机执行本申请实施例的各个方法中由网络设备实现的相应流程,为了简洁,在此不再赘述。
可选地,该计算机程序产品可应用于本申请实施例中的移动终端/终端设备,并且该计算机程序指令使得计算机执行本申请实施例的各个方法中由移动终端/终端设备实现的相应流程,为了简洁,在此不再赘述。
本申请实施例还提供了一种计算机程序。
可选的,该计算机程序可应用于本申请实施例中的网络设备,当该计算机程序在计算机上运行时,使得计算机执行本申请实施例的各个方法中由网络设备实现的相应流程,为了简洁,在此不再赘述。
可选地,该计算机程序可应用于本申请实施例中的移动终端/终端设备,当该计算机程序在计算机上运行时,使得计算机执行本申请实施例的各个方法中由移动终端/终端设备实现的相应流程,为了简洁,在此不再赘述。
本领域普通技术人员可以意识到,结合本文中所公开的实施例描述的各示例的单元及算法步骤,能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到,为描述的方便和简洁,上述描述的系统、装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,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。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个计算机可读取存储介质中。针对这样的理解,本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器(Read-Only Memory,ROM)、随机存取存储器(Random Access Memory,RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述,仅为本申请的具体实施方式,但本申请的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本申请揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本申请的保护范围之内。因此,本申请的保护范围应所述以权利要求的保护范围为准。

Claims (42)

  1. 一种无线通信方法,其特征在于,包括:
    在上行带宽部分BWP上配置了两步随机接入资源和四步随机接入资源的情况下,终端设备确定是否允许从两步随机接入切换至四步随机接入。
  2. 根据权利要求1所述的方法,其特征在于,所述终端设备确定是否允许从两步随机接入切换至四步随机接入,包括:
    所述终端设备根据第一信息确定是否允许从两步随机接入切换至四步随机接入;
    其中,所述第一信息包括以下中的至少一种:
    是否允许从两步随机接入切换至四步随机接入的切换指示信息,
    两步随机接入的第一条消息的负载大小与至少一个随机接入前导码组对应的四步随机接入的第三条消息的大小是否匹配,
    两步随机接入的第一条消息的最大传输次数的取值。
  3. 根据权利要求2所述的方法,其特征在于,所述终端设备根据第一信息确定是否允许从两步随机接入切换至四步随机接入,包括以下中的一种:
    若所述切换指示信息指示不允许从两步随机接入切换至四步随机接入,所述终端设备确定不允许从两步随机接入切换至四步随机接入;
    若所述切换指示信息指示允许从两步随机接入切换至四步随机接入,且两步随机接入的第一条消息的负载大小与所述至少一个随机接入前导码组中的部分或者全部随机接入前导码组对应的四步随机接入的第三条消息的大小匹配,所述终端设备确定允许从两步随机接入切换至四步随机接入;
    若所述切换指示信息指示允许从两步随机接入切换至四步随机接入,且两步随机接入的第一条消息的负载大小与所述至少一个随机接入前导码组中的全部随机接入前导码组对应的四步随机接入的第三条消息的大小均不匹配,所述终端设备确定不允许从两步随机接入切换至四步随机接入。
  4. 根据权利要求2所述的方法,其特征在于,所述终端设备根据第一信息确定是否允许从两步随机接入切换至四步随机接入,包括以下中的一种:
    若两步随机接入的第一条消息的负载大小与所述至少一个随机接入前导码组中的部分或者全部随机接入前导码组对应的四步随机接入的第三条消息的大小匹配,所述终端设备确定允许从两步随机接入切换至四步随机接入;
    若两步随机接入的第一条消息的负载大小与所述至少一个随机接入前导码组中的全部随机接入前导码组对应的四步随机接入的第三条消息的大小均不匹配,所述终端设备确定不允许从两步随机接入切换至四步随机接入。
  5. 根据权利要求2所述的方法,其特征在于,所述终端设备根据第一信息确定是否允许从两步随机接入切换至四步随机接入,包括以下中的一种:
    若两步随机接入的第一条消息的最大传输次数的取值为无限值,所述终端设备确定不允许从两步随机接入切换至四步随机接入;
    若两步随机接入的第一条消息的最大传输次数的取值为有限值,且两步随机接入的第一条消息的负载大小与所述至少一个随机接入前导码组中的部分或者全部随机接入前导码组对应的四步随机接入的第三条消息的大小匹配,所述终端设备确定允许从两步随机接入切换至四步随机接入;
    若两步随机接入的第一条消息的最大传输次数的取值为有限值,且两步随机接入的第一条消息的负载大小与所述至少一个随机接入前导码组中的全部随机接入前导码组对应的四步随机接入的第三条消息的大小均不匹配,所述终端设备确定不允许从两步随机接入切换至四步随机接入。
  6. 根据权利要求3或4所述的方法,其特征在于,所述方法还包括:
    若所述终端设备确定不允许从两步随机接入切换至四步随机接入,所述终端设备在尝试了N次两步随机接入之后,进行随机接入问题上报,其中,N为两步随机接入的第一条消息的最大传输次数。
  7. 根据权利要求5所述的方法,其特征在于,所述方法还包括:
    若所述终端设备确定不允许从两步随机接入切换至四步随机接入,所述终端设备在尝试了M次两步随机接入之后,进行随机接入问题上报,其中,M为两步随机接入中触发问题上报的最大尝试次数。
  8. 根据权利要求7所述的方法,其特征在于,M为网络设备在两步随机接入参数配置中配置的。
  9. 根据权利要求3至5中任一项所述的方法,其特征在于,所述方法还包括:
    若所述终端设备确定允许从两步随机接入切换至四步随机接入,所述终端设备在尝试了N次两步随机接入之后,从两步随机接入切换至四步随机接入,其中,N为两步随机接入的第一条消息的最大传输次数。
  10. 根据权利要求9所述的方法,其特征在于,所述方法还包括:
    所述终端设备从第一随机接入前导码组中选择用于四步随机接入的随机接入前导码,其中,所述第一随机接入前导码组为所述至少一个随机接入前导码组中对应的四步随机接入的第三条消息的大小与两步随机接入的第一条消息的负载大小匹配的一个随机接入前导码组。
  11. 根据权利要求2至10中任一项所述的方法,其特征在于,所述切换指示信息和/或两步随机接入的第一条消息的最大传输次数为网络设备在两步随机接入参数配置中配置的。
  12. 根据权利要求2至11中任一项所述的方法,其特征在于,所述至少一个随机接入前导码组为网络设备在四步随机接入参数配置中配置的。
  13. 一种无线通信方法,其特征在于,包括:
    在上行带宽部分BWP上配置了两步随机接入资源和四步随机接入资源的情况下,网络设备向终端设备发送用于配置两步随机接入参数的第一配置信息和用于配置四步随机接入参数的第二配置信息,其中,所述第一配置信息和所述第二配置信息用于所述终端设备确定是否允许从两步随机接入切换至四步随机接入。
  14. 根据权利要求13所述的方法,其特征在于,所述第一配置信息包括以下中的至少一种:
    是否允许从两步随机接入切换至四步随机接入的切换指示信息,
    两步随机接入的第一条消息的最大传输次数,
    用于两步随机接入的至少一个随机接入前导码组。
  15. 根据权利要求13所述的方法,其特征在于,所述第一配置信息包括以下中的至少一种:
    两步随机接入中触发问题上报的最大尝试次数,
    两步随机接入的第一条消息的最大传输次数,
    用于两步随机接入的至少一个随机接入前导码组。
  16. 根据权利要求13至15中任一项所述的方法,其特征在于,所述第二配置信息至少包括用于四步随机接入的至少一个随机接入前导码组。
  17. 一种终端设备,其特征在于,包括:处理单元,
    在上行带宽部分BWP上配置了两步随机接入资源和四步随机接入资源的情况下,所述处理单元用于确定是否允许从两步随机接入切换至四步随机接入。
  18. 根据权利要求17所述的终端设备,其特征在于,所述处理单元具体用于:
    根据第一信息确定是否允许从两步随机接入切换至四步随机接入;
    其中,所述第一信息包括以下中的至少一种:
    是否允许从两步随机接入切换至四步随机接入的切换指示信息,
    两步随机接入的第一条消息的负载大小与至少一个随机接入前导码组对应的四步随机接入的第三条消息的大小是否匹配,
    两步随机接入的第一条消息的最大传输次数的取值。
  19. 根据权利要求18所述的终端设备,其特征在于,所述处理单元根据第一信息确定是否允许从两步随机接入切换至四步随机接入,包括以下中的一种:
    若所述切换指示信息指示不允许从两步随机接入切换至四步随机接入,所述处理单元确定不允许从两步随机接入切换至四步随机接入;
    若所述切换指示信息指示允许从两步随机接入切换至四步随机接入,且两步随机接入的第一条消息的负载大小与所述至少一个随机接入前导码组中的部分或者全部随机接入前导码组对应的四步随机接入的第三条消息的大小匹配,所述处理单元确定允许从两步随机接入切换至四步随机接入;
    若所述切换指示信息指示允许从两步随机接入切换至四步随机接入,且两步随机接入的第一条消息的负载大小与所述至少一个随机接入前导码组中的全部随机接入前导码组对应的四步随机接入的第三条消息的大小均不匹配,所述处理单元确定不允许从两步随机接入切换至四步随机接入。
  20. 根据权利要求18所述的终端设备,其特征在于,所述处理单元根据第一信息确定是否允许从两步随机接入切换至四步随机接入,包括以下中的一种:
    若两步随机接入的第一条消息的负载大小与所述至少一个随机接入前导码组中的部分或者全部随机接入前导码组对应的四步随机接入的第三条消息的大小匹配,所述处理单元确定允许从两步随机接入切换至四步随机接入;
    若两步随机接入的第一条消息的负载大小与所述至少一个随机接入前导码组中的全部随机接入前导码组对应的四步随机接入的第三条消息的大小均不匹配,所述处理单元确定不允许从两步随机接入切换至四步随机接入。
  21. 根据权利要求18所述的终端设备,其特征在于,所述处理单元根据第一信息确定是否允许 从两步随机接入切换至四步随机接入,包括以下中的一种:
    若两步随机接入的第一条消息的最大传输次数的取值为无限值,所述处理单元确定不允许从两步随机接入切换至四步随机接入;
    若两步随机接入的第一条消息的最大传输次数的取值为有限值,且两步随机接入的第一条消息的负载大小与所述至少一个随机接入前导码组中的部分或者全部随机接入前导码组对应的四步随机接入的第三条消息的大小匹配,所述处理单元确定允许从两步随机接入切换至四步随机接入;
    若两步随机接入的第一条消息的最大传输次数的取值为有限值,且两步随机接入的第一条消息的负载大小与所述至少一个随机接入前导码组中的全部随机接入前导码组对应的四步随机接入的第三条消息的大小均不匹配,所述处理单元确定不允许从两步随机接入切换至四步随机接入。
  22. 根据权利要求19或20所述的终端设备,其特征在于,所述终端设备还包括:通信单元,
    若所述终端设备确定不允许从两步随机接入切换至四步随机接入,所述终端设备在尝试了N次两步随机接入之后,所述通信单元用于进行随机接入问题上报,其中,N为两步随机接入的第一条消息的最大传输次数。
  23. 根据权利要求21所述的终端设备,其特征在于,所述终端设备还包括:通信单元,
    若所述终端设备确定不允许从两步随机接入切换至四步随机接入,所述终端设备在尝试了M次两步随机接入之后,所述通信单元用于进行随机接入问题上报,其中,M为两步随机接入中触发问题上报的最大尝试次数。
  24. 根据权利要求23所述的终端设备,其特征在于,M为网络设备在两步随机接入参数配置中配置的。
  25. 根据权利要求19至21中任一项所述的终端设备,其特征在于,
    若所述终端设备确定允许从两步随机接入切换至四步随机接入,所述终端设备在尝试了N次两步随机接入之后,所述处理单元还用于从两步随机接入切换至四步随机接入,其中,N为两步随机接入的第一条消息的最大传输次数。
  26. 根据权利要求25所述的终端设备,其特征在于,所述处理单元还用于从第一随机接入前导码组中选择用于四步随机接入的随机接入前导码,其中,所述第一随机接入前导码组为所述至少一个随机接入前导码组中对应的四步随机接入的第三条消息的大小与两步随机接入的第一条消息的负载大小匹配的一个随机接入前导码组。
  27. 根据权利要求18至26中任一项所述的终端设备,其特征在于,所述切换指示信息和/或两步随机接入的第一条消息的最大传输次数为网络设备在两步随机接入参数配置中配置的。
  28. 根据权利要求18至27中任一项所述的终端设备,其特征在于,所述至少一个随机接入前导码组为网络设备在四步随机接入参数配置中配置的。
  29. 一种网络设备,其特征在于,包括:通信单元,
    在上行带宽部分BWP上配置了两步随机接入资源和四步随机接入资源的情况下,所述通信单元用于向终端设备发送用于配置两步随机接入参数的第一配置信息和用于配置四步随机接入参数的第二配置信息,其中,所述第一配置信息和所述第二配置信息用于所述终端设备确定是否允许从两步随机接入切换至四步随机接入。
  30. 根据权利要求29所述的网络设备,其特征在于,所述第一配置信息包括以下中的至少一种:
    是否允许从两步随机接入切换至四步随机接入的切换指示信息,
    两步随机接入的第一条消息的最大传输次数,
    用于两步随机接入的至少一个随机接入前导码组。
  31. 根据权利要求29所述的网络设备,其特征在于,所述第一配置信息包括以下中的至少一种:
    两步随机接入中触发问题上报的最大尝试次数,
    两步随机接入的第一条消息的最大传输次数,
    用于两步随机接入的至少一个随机接入前导码组。
  32. 根据权利要求29至31中任一项所述的网络设备,其特征在于,所述第二配置信息至少包括用于四步随机接入的至少一个随机接入前导码组。
  33. 一种终端设备,其特征在于,包括:处理器和存储器,所述存储器用于存储计算机程序,所述处理器用于调用并运行所述存储器中存储的计算机程序,执行如权利要求1至12中任一项所述的方法。
  34. 一种网络设备,其特征在于,包括:处理器和存储器,所述存储器用于存储计算机程序,所述处理器用于调用并运行所述存储器中存储的计算机程序,执行如权利要求13至16中任一项所述的方法。
  35. 一种装置,其特征在于,包括:处理器,用于从存储器中调用并运行计算机程序,使得安装有所述装置的设备执行如权利要求1至12中任一项所述的方法。
  36. 一种装置,其特征在于,包括:处理器,用于从存储器中调用并运行计算机程序,使得安装有所述装置的设备执行如权利要求13至16中任一项所述的方法。
  37. 一种计算机可读存储介质,其特征在于,用于存储计算机程序,所述计算机程序使得计算机执行如权利要求1至12中任一项所述的方法。
  38. 一种计算机可读存储介质,其特征在于,用于存储计算机程序,所述计算机程序使得计算机执行如权利要求13至16中任一项所述的方法。
  39. 一种计算机程序产品,其特征在于,包括计算机程序指令,该计算机程序指令使得计算机执行如权利要求1至12中任一项所述的方法。
  40. 一种计算机程序产品,其特征在于,包括计算机程序指令,该计算机程序指令使得计算机执行如权利要求13至16中任一项所述的方法。
  41. 一种计算机程序,其特征在于,所述计算机程序使得计算机执行如权利要求1至12中任一项所述的方法。
  42. 一种计算机程序,其特征在于,所述计算机程序使得计算机执行如权利要求13至16中任一项所述的方法。
PCT/CN2019/126733 2019-12-19 2019-12-19 无线通信方法、终端设备和网络设备 WO2021120126A1 (zh)

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CN202311467342.XA CN117580188A (zh) 2019-12-19 2019-12-19 无线通信方法、终端设备和网络设备
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