[go: up one dir, main page]

WO2019095337A1 - 随机接入方法、装置以及通信系统 - Google Patents

随机接入方法、装置以及通信系统 Download PDF

Info

Publication number
WO2019095337A1
WO2019095337A1 PCT/CN2017/111757 CN2017111757W WO2019095337A1 WO 2019095337 A1 WO2019095337 A1 WO 2019095337A1 CN 2017111757 W CN2017111757 W CN 2017111757W WO 2019095337 A1 WO2019095337 A1 WO 2019095337A1
Authority
WO
WIPO (PCT)
Prior art keywords
bwp
msg
preamble
user equipment
frequency resource
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2017/111757
Other languages
English (en)
French (fr)
Inventor
蒋琴艳
张磊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to CN201780095493.3A priority Critical patent/CN111165060B/zh
Priority to JP2020524744A priority patent/JP7024867B2/ja
Priority to PCT/CN2017/111757 priority patent/WO2019095337A1/zh
Priority to US16/365,158 priority patent/US11064527B2/en
Publication of WO2019095337A1 publication Critical patent/WO2019095337A1/zh
Anticipated expiration legal-status Critical
Priority to US17/326,516 priority patent/US12160893B2/en
Priority to JP2022019849A priority patent/JP7310951B2/ja
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0092—Indication of how the channel is divided
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H04W74/0841—Random access procedures, e.g. with 4-step access with collision treatment

Definitions

  • the present invention relates to the field of communications, and in particular, to a random access method, apparatus, and communication system.
  • the random access procedure includes non-contention random access and contention based random access.
  • a user equipment User Equipment, UE
  • PRACH physical random access channel
  • the UE may select preamble and PRACH for random access.
  • 5G wireless communication systems In order to support the rapid growth of business volume and the increasing number of new businesses, research institutes and standardization organizations around the world have launched research on fifth-generation (5G) wireless communication systems.
  • 5G fifth-generation
  • 3GPP 3rd Generation Partnership Project
  • mMTC large-scale machine type communication
  • eMBB enhanced mobile broadband
  • ultra-reliable in the research process.
  • Low-latency communication uRLLC, ultra-Reliable Low Latency Communication
  • the inventors have found that in the New Radio (NR) system, the concept of a bandwidth part (BWP) is introduced, and one DL (downlink)/UL (uplink) bandwidth contains multiple BWPs.
  • BWP bandwidth part
  • Each UE may be configured with one or more DL/UL BWPs, and receive/send uplink and downlink data using one of the configured DL/UL BWPs at the same time.
  • the base station informs the UE of the starting PRB index of each DL/UL BWP (or the offset value of the first PRB from the initial PRB to the downlink bandwidth) by using Radio Resource Control (RRC) signaling, and the subcarrier spacing , physical resource block (Physical Resource Block, PRB) number (or bandwidth), Cyclic Prefix (CP) length and other information.
  • RRC Radio Resource Control
  • DL/UL BWP configurations for different UEs may different.
  • the base station cannot uniquely determine a UE according to the received message 1 (msg.1), and thus cannot determine the random access response (RAR).
  • the DL BWP should be used, which causes random access to not work properly.
  • an embodiment of the present invention provides a random access method, apparatus, and communication system.
  • a random access method includes:
  • DL BWP first carrier bandwidth
  • the network device transmits the msg.2A on the first DL BWP.
  • a random access method is provided, where the method includes:
  • the user equipment sends the first preamble on the first time-frequency resource
  • the user equipment listens on the DL BWP and receives the msg.2.
  • a random access device configured in a network device, where the device includes:
  • a receiving unit configured to receive, by the first time-frequency resource, a first preamble sent by the first user equipment
  • a determining unit configured to determine, according to the preamble, a first carrier bandwidth (DL BWP) for transmitting a second message (msg. 2A);
  • a sending unit that transmits the msg.2A on the first DL BWP.
  • a random access device configured in a user equipment, where the device includes:
  • a sending unit where the first preamble is sent on the first time-frequency resource
  • a determining unit that determines, according to the first preamble, a DL BWP that receives msg.2;
  • a receiving unit that listens on the DL BWP and receives the msg.2.
  • a network device wherein the network device comprises the apparatus of the foregoing third aspect.
  • a user equipment wherein the user equipment comprises the apparatus of the aforementioned fourth aspect.
  • a communication system comprising the user equipment of the foregoing sixth aspect and the network device of the foregoing fifth aspect.
  • a computer readable program is provided, wherein when the program is executed in a network device, the program causes a computer to perform the method of the first aspect described above in the network device .
  • a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform the method of the first aspect described above in a network device.
  • a computer readable program is provided, wherein when the program is executed in a user device, the program causes a computer to perform the method of the second aspect described above in the user device .
  • a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform the method of the aforementioned second aspect in a user equipment.
  • the base station can determine the feedback random access response (msg. 2) according to the received indication information carried by the preamble and/or the random access request (msg.1) sent by the user equipment.
  • DL BWP ensures normal access of user equipment.
  • FIG. 1 is a schematic diagram of a communication system according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of interaction of a random access method according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a random access method of Embodiment 1;
  • FIG. 4 is a schematic diagram of one embodiment of a PRACH resource partitioning set
  • FIG. 5 is a schematic diagram of another embodiment of a PRACH resource partitioning set
  • FIG. 6 is a schematic diagram of still another embodiment of a PRACH resource partitioning set
  • FIG. 7 is a schematic diagram of still another embodiment of a PRACH resource partitioning set
  • FIG. 8 is a schematic diagram of one embodiment of a preamble partitioning set
  • FIG. 9 is a schematic diagram of one embodiment of a PRACH resource and preamble partitioning set
  • FIG. 10 is a schematic diagram of a random access method of Embodiment 2;
  • FIG. 11 is a schematic diagram of a random access device of Embodiment 3.
  • Figure 12 is a schematic diagram of a random access device of Embodiment 4.
  • FIG. 13 is a schematic diagram of a network device of Embodiment 5.
  • Figure 14 is a schematic diagram of a user equipment of Embodiment 6.
  • the terms “first”, “second”, etc. are used to distinguish different elements from the title, but do not indicate the spatial arrangement or chronological order of the elements, and these elements should not be used by these terms. Limited.
  • the term “and/or” includes any and all combinations of one or more of the associated listed terms.
  • the terms “comprising,” “comprising,” “having,” or “an” are used to distinguish different elements from the title, but do not indicate the spatial arrangement or chronological order of the elements, and these elements should not be used by these terms. Limited.
  • the term “and/or” includes any and all combinations of one or more of the associated listed terms.
  • the term “communication network” or “wireless communication network” may refer to a network that conforms to any communication standard such as Long Term Evolution (LTE), Enhanced Long Term Evolution (LTE-A, LTE- Advanced), Wideband Code Division Multiple Access (WCDMA), High-Speed Packet Access (HSPA), and the like.
  • LTE Long Term Evolution
  • LTE-A Enhanced Long Term Evolution
  • WCDMA Wideband Code Division Multiple Access
  • HSPA High-Speed Packet Access
  • the communication between devices in the communication system may be performed according to any phase of the communication protocol, and may include, for example but not limited to, the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G, and future. 5G, New Radio (NR), etc., and/or other communication protocols currently known or to be developed in the future.
  • the term "network device” refers to, for example, a device in a communication system that accesses a user device to a communication network and provides a service for the user device.
  • the network device may include, but is not limited to, a device: a base station (BS, a base station), an access point (AP, an Access Point), a transmission and reception point (TRP), a broadcast transmitter, and a mobility management entity (MME, Mobile). Management Entity), gateway, server, Radio Network Controller (RNC), Base Station Controller (BSC), and so on.
  • BS base station
  • AP access point
  • TRP transmission and reception point
  • MME mobility management entity
  • Management Entity gateway
  • server Radio Network Controller
  • BSC Base Station Controller
  • the base station may include, but is not limited to, a Node B (NodeB or NB), an evolved Node B (eNodeB or eNB), and a 5G base station (gNB), and the like, and may further include a Remote Radio Head (RRH). , Remote Radio Unit (RRU), relay or low power node (eg femto, pico, etc.).
  • RRH Remote Radio Head
  • RRU Remote Radio Unit
  • base station may include some or all of their functions, and each base station may provide communication coverage for a particular geographic area.
  • the term "cell” can refer to a base station and/or its coverage area, depending on the context in which the term is used.
  • the term "user equipment” (UE) or “Terminal Equipment” (TE) refers to, for example, a device that accesses a communication network through a network device and receives a network service.
  • the user equipment may be fixed or mobile, and may also be referred to as a mobile station (MS, Mobile Station), a terminal, a subscriber station (SS, Subscriber Station), an access terminal (AT, Access Terminal), a station, and the like.
  • the user equipment may include, but is not limited to, a cellular phone (Cellular Phone), a personal digital assistant (PDA, Personal Digital Assistant), a wireless modem, a wireless communication device, a handheld device, a machine type communication device, a laptop computer, Cordless phones, smart phones, smart watches, digital cameras, and more.
  • a cellular phone Cellular Phone
  • PDA Personal Digital Assistant
  • wireless modem Wireless Fidelity
  • a wireless communication device a handheld device
  • a machine type communication device a laptop computer
  • Cordless phones smart phones, smart watches, digital cameras, and more.
  • the user equipment may also be a machine or device that performs monitoring or measurement, and may include, but is not limited to, a Machine Type Communication (MTC) terminal, In-vehicle communication terminal, device to device (D2D, Device to Device) terminal, machine to machine (M2M, Machine to Machine) terminal, and the like.
  • MTC Machine Type Communication
  • D2D Device to Device
  • M2M Machine to Machine
  • FIG. 1 is a schematic diagram of a communication system according to an embodiment of the present invention.
  • the user equipment and the network device are taken as an example.
  • the communication system 100 may include: a network device 101 and a user equipment 102.
  • FIG. 1 is described by taking only one user equipment as an example.
  • the network device 101 is, for example, a network device gNB of the NR.
  • an existing service or a service that can be implemented in the future can be performed between the network device 101 and the user equipment 102.
  • these services include, but are not limited to, enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and high reliability low latency communication (URLLC, Ultra-Reliable and Low- Latency Communication), and more.
  • eMBB enhanced mobile broadband
  • mMTC massive machine type communication
  • URLLC Ultra-Reliable and Low- Latency Communication
  • the user equipment 102 can transmit data to the network device 101, for example, using an unlicensed transmission method.
  • the network device 101 can receive data sent by one or more user devices 102 and feed back information (eg, acknowledge ACK/non-acknowledgement NACK) information to the user device 102.
  • the user device 102 can confirm the end of the transmission process according to the feedback information, or can further Perform new data transfer or data retransmission.
  • step 201 the gNB may trigger the UE to initiate a contention-based random connection.
  • step 201 is optional, and the UE may also initiate a contention-based random access procedure autonomously;
  • step 202 the gNB may perform various configurations for the UE or may also be referred to as performing various indications. This embodiment does not limit the order of execution of step 201 and step 202.
  • step 203 the UE sends msg.1 to the gNB, that is, a random access request, and the msg.1 may also carry data information.
  • the gNB receives the msg.1 on the configured time-frequency resource of the transmitted msg.1, determines the DL BWP of the feedback RAR according to the msg.1, and sends the msg.2 to the UE. That is, a random access response (RAR), which includes scheduling information for scheduling the UE to send msg.3.
  • RAR random access response
  • the UE monitors and receives the RAR, and sends msg.3 to the gNB according to the scheduling information included in the received RAR, where the identifier of the UE is included in the msg.3.
  • the gNB receives msg.3 at the scheduling position of the scheduling msg.3, uniquely determines the UE according to the identity of the UE included in the msg.3, and sends msg.4 to the determined UE.
  • FIG. 3 is a schematic diagram of the method. Referring to FIG. 3, the method includes:
  • Step 301 The network device receives, in the first time-frequency resource, a first preamble sent by the first user equipment.
  • Step 302 The network device determines, according to the first preamble, a first carrier bandwidth (DL BWP) for transmitting a second message (msg. 2A);
  • DL BWP first carrier bandwidth
  • Step 303 The network device sends the msg.2A on the first DL BWP.
  • the UE sends a preamble as a random access request on a time-frequency resource, also referred to as msg.1.
  • a time-frequency resource also referred to as msg.1.
  • RAR random access response
  • the time-frequency resource used by the preamble may be a PRACH resource.
  • the present embodiment is not limited thereto.
  • the time-frequency resource used by the preamble may be otherwise called, or may be For other resources, etc.
  • the network device may determine, according to the received time-frequency resource used by the first preamble and/or the first preamble, a DL BWP (referred to as the first) that sends msg.2 (referred to as msg.2A). DL BWP) to send the msg.2. Thereby, normal access of the UE is guaranteed.
  • a DL BWP referred to as the first
  • msg.2A referred to as msg.2A
  • the network device can indicate the first DL BWP and at least one preamble corresponding to the first DL BWP.
  • the network device may configure a correspondence between the first DL BWP and the at least one preamble, thereby indicating at least one preamble corresponding to the first DL BWP, and the network device may according to the indication and the received preamble (the first preamble) ) Determine the DL BWP that sends msg.2.
  • the received first preamble belongs to at least one of the indicated corresponding DL BWPs
  • it can be determined that the DL BWP that sends msg.2 is the first DL BWP.
  • the network device may further indicate the second DL BWP and the at least one preamble corresponding to the second DL BWP, after the network device receives the second preamble sent by the second user equipment, if the second preamble belongs to The at least one preamble corresponding to the second DL BWP, the network device determines that the DL BWP that sends the msg.2 is the second DL BWP, and further sends the msg.2 on the second DL BPW.
  • the network device can determine to transmit the DL BWP of msg.2 according to the received preamble and the above indication. For example, if the received preamble (eg, the first preamble) belongs to at least one preamble corresponding to the first DL BWP, the network device determines that the DL BWP that sends msg.2 is the first DL BWP, if the received preamble (eg, The second preamble belongs to at least one preamble corresponding to the second DL BWP, and the network device determines that the DL BWP that transmits msg.2 is the second DL BWP. Thus, the network device can determine to transmit the DL BWP of msg.2 according to the received preamble.
  • the received preamble eg, the first preamble
  • the second preamble belongs to at least one preamble corresponding to the second DL BWP
  • the network device determines that the DL BWP that transmit
  • the network device may indicate the first DL BWP and the at least one time-frequency resource corresponding to the first DL BWP for transmitting the preamble. For example, the network device may configure a correspondence between the first DL BWP and the at least one time-frequency resource for transmitting the preamble, thereby indicating at least one time-frequency resource for transmitting the preamble corresponding to the first DL BWP, where the network device may The DL BWP for transmitting msg.2 is determined according to the instruction and the time-frequency resource (the first time-frequency resource) for transmitting the preamble (the first preamble).
  • the first time-frequency resource belongs to the indicated at least one time-frequency resource for transmitting the preamble corresponding to the first DL BWP, it may be determined that the DL BWP that sends the msg.2 is the first DL BWP.
  • the network device may further indicate the second DL BWP and the at least one time-frequency resource for transmitting the preamble corresponding to the second DL BWP, after the network device receives the second preamble sent by the second user equipment, If the time-frequency resource (for example, the second time-frequency resource) of the second preamble is sent to belong to the at least one time-frequency resource for transmitting the preamble corresponding to the second DL BWP, the network device determines that the DL BWP that sends the msg.2 is the The second DL BWP, and further transmitting the above msg.2 on the second DL BPW.
  • the time-frequency resource for example, the second time-frequency resource
  • the network device may determine to send the DL BWP of msg.2 according to the time-frequency resource of the receiving preamble and the foregoing indication. For example, if the time-frequency resource (for example, the first time-frequency resource) of the receiving preamble belongs to at least one time-frequency resource corresponding to the first DL BWP for transmitting the preamble, the network device determines that the DL BWP that sends the msg.2 is the first. a DL BWP, if the time-frequency resource (for example, the second time-frequency resource) that receives the preamble belongs to at least one of the pre-preamble corresponding to the second DL BWP.
  • the time-frequency resource for example, the second time-frequency resource
  • the network device determines that the DL BWP that sends msg.2 is the second DL BWP. Therefore, the network device can determine the DL BWP for transmitting msg.2 according to the time-frequency resource of the receiving preamble.
  • the first user equipment and the second user equipment may be the same or different, that is, the same user equipment may also use the same or different time-frequency resources to send different preambles.
  • the network device indicates “at least one preamble corresponding to different DL BWPs” and “at least one time-frequency resource corresponding to different DL BWPs for transmitting preambles”, and the network device is receiving.
  • the DL BWP for sending msg.2 can be determined according to the preamble and the time-frequency resource of the preamble and combined with the above indication.
  • the network device may configure multiple DL BWPs for transmitting msg.2, and each DL BWP for transmitting msg.2 may correspond to one preamble set and/or one time-frequency resource set.
  • the foregoing time-frequency resource that can be used to send the preamble is a PRACH resource, and all PRACH resources that can be used to send the preamble can be divided into one or more sets, one set.
  • the PRACH resource corresponds to a DL BWP that can be used to send msg.2. Therefore, after receiving the preamble, the network device may determine to send the DL BWP of msg.2 according to the foregoing indication and the PRACH resource used by the preamble.
  • all the PRACH resources may be divided according to the time domain location and/or the frequency domain location of the PRACH resource, for example, the PRACH resources with the same time domain location are divided into one set; or the PRACH resources with the same frequency domain location are divided into one set. Or dividing the PRACH resources with the same time domain location into multiple sets, or dividing the PRACH resources with the same frequency domain location into multiple sets. This embodiment does not limit the manner in which the PRACH resource set is divided.
  • FIG. 4 and FIG. 5 respectively show the division of PRACH resources and the correspondence between different PRACH resource sets and DL BWPs for transmitting RARs in the case where all PRACH resources are configured in one UL BWP, and in FIGS. 4 and 5
  • an initial uplink BWP initial active UL BWP
  • the eight PRACH resources are divided into four sets, corresponding to DL BWP 0 to DL BWP 3.
  • the eight PRACH resources are divided into four sets, corresponding to DL BWP0 ⁇ DL BWP 3.
  • FIG. 6 and FIG. 7 respectively show a partitioning situation of PARCH resources and a correspondence relationship between different PRACH resource sets and DL BWPs for transmitting RARs in a case where all PRACH resources are configured in a plurality of UL BWPs
  • FIG. 6 and FIG. 7 all ULACH resources are configured in UL BWP 0 and UL BWP 1 as an example.
  • the eight PRACH resources are divided into two sets, one for each DL BWP, and one set of PRACH resources is configured for one UL BWP.
  • FIG. 6 according to the frequency domain location of the PRACH resource, the eight PRACH resources are divided into two sets, one for each DL BWP, and one set of PRACH resources is configured for one UL BWP.
  • the eight PRACH resources are divided into four sets, respectively corresponding to one DL BWP, and the PRACH resources of the two sets are configured in one UL BWP.
  • the other two sets of PRACH resources are configured in another UL BWP.
  • the at least one time-frequency resource corresponding to the different DL BWPs that is used by the network device to transmit the preamble refers to the UL BWP that includes the PRACH resources. That is, the network device may indicate different UL BWPs including PRACH resources corresponding to different DL BWPs.
  • the base station may indicate that UL BWP0 corresponds to DL BWP0 and UL BWP 1 corresponds to DL BWP 1. Taking FIG.
  • the base station may indicate that UL BWP0 corresponds to DL BWP 0 and DL BWP 1 and UL BWP 1 corresponds to DL BWP 2 and DL BWP 3. Therefore, the network device can determine to send the DL BWP of msg.2 according to the indication and the UL BWP where the received PRACH resource used by the preamble is located.
  • the network device may determine that the DL BWP that sends the msg.2 is the DL BWP2, then the network The device can send msg.2 on DL BWP 2.
  • all preambles may be divided into multiple sets to respectively correspond to different DLs. BWP. Therefore, after receiving the preamble, the network device may further determine to send the DL BWP of msg.2 by referring to the preamble that sends the msg.1.
  • FIG. 8 shows the division of the preamble and the correspondence between the different preamble sets and the DL BWP.
  • preamble set #0 corresponds to DL BWP
  • preamble set #1 corresponds to DL BWP 1
  • preamble set #2 corresponds to DL BWP 2
  • preamble set #3 corresponds to DL BWP 3.
  • the manner of dividing the preamble set is not limited.
  • the root index may be divided according to the root index.
  • the division may be performed according to a cyclic shift, or may be performed according to an orthogonal code (OCC).
  • OCC orthogonal code
  • the corresponding relationship between the PRACH resource for transmitting the preamble and the UL BWP and the DL BWP including the PRACH resource, and the corresponding relationship between the preamble and the DL BWP are respectively described.
  • the foregoing two correspondences may be combined. For example, all PRACH resources that can be used to send the preamble are divided into multiple sets, and different sets of PRACH resources correspond to different DL BWPs, and all preambles are also divided into multiple sets, and different sets of preambles are different. DL BWP.
  • the UL BWP including the PRACH resource that can be used to send the preamble corresponds to different DL BWPs, and at the same time, all preambles are divided into multiple sets, and different sets of preambles correspond to different DL BWPs.
  • FIG. 9 shows a partitioning situation of a PARCH resource, a partitioning situation of a preamble, and a correspondence between different preamble sets and PRACH resource sets and a DL BWP in a case where all PRACH resources are configured in a plurality of UL BWPs, and FIG. 9 is in FIG.
  • all PRACH resources are configured in UL BWP 0 and UL BWP 1 as an example.
  • the preamble is divided into two sets, preamble set #0 and preamble set #1, corresponding to DL BWP 0 and DL BWP 1, respectively, and in UL BWP 1, preamble is also divided.
  • the network device may determine two DL BWPs according to the PRACH resource that sends the preamble, that is, DL BWP 0 and DL BWP 1, or DL BWP 2 and DL BWP 3, and further according to the received
  • the preamble belongs to the preamble set #0 or belongs to the preamble set #1 to finally determine the DL BWP that sends msg.2.
  • the network device may perform the foregoing indication by using broadcast information (PBCH), or may perform the foregoing indication by using system information and/or RRC signaling (for example, group-specific RRC and/or UE-specific RRC), but The invention is not limited to this.
  • PBCH broadcast information
  • RRC signaling for example, group-specific RRC and/or UE-specific RRC
  • the network device may transmit one or more SSBs (SS/PBCH block) in different frequency domain locations, PBCH in each SSB.
  • the DL BWP for transmitting msg.2 is respectively indicated in the system, and the time-frequency resource and/or preamble of the transmission msg.1 corresponding to the DL BWP is indicated in the system message.
  • the system information and/or RRC signaling indicates that the DL BWP can be used to send msg.2, it can be used for sending
  • the time-frequency resource and/or preamble to which msg.1 is sent, and the DL BWP that can be used to transmit msg.2 may be indicated in an RRC IE of the same message (eg, system-specific RRC/UE-specific RRC), for example :
  • One message contains one or more RRC IEs (common or dedicated, such as BandwidthPart) indicating the DL BWP for transmitting msg.2, and each IE indicating the DL BWP for transmitting msg.2 contains the corresponding time.
  • Frequency resources and/or preamble eg, RACH-ConfigCommon, RACH-ConfigDedicated.
  • a message includes one or more RRC IEs indicating that time-frequency resources and/or preambles of msg.1 can be sent (eg, RACH- ConfigCommon, RACH-ConfigDedicated), each indication may be used to send a msg.1 time-frequency resource and/or a DL BWP (eg, BandwidthPart) of the msg.2 corresponding to the IE of the preamble.
  • RRC IEs indicating that time-frequency resources and/or preambles of msg.1 can be sent
  • each indication may be used to send a msg.1 time-frequency resource and/or a DL BWP (eg, BandwidthPart) of the msg.2 corresponding to the IE of the preamble.
  • time-frequency resources and/or preambles that can be used to transmit msg.1, and DL BWPs that can be used to send msg.2 can also be indicated in different IEs of the same message, for example, one message containing one or more indication SSBs Or an RRC IE configured by the CSI-RS (for example, CSI-MeasConfig), where each IE indicating the CSI-RS configuration includes a corresponding time-frequency resource and/or preamble (for example, RACH-ConfigCommon, RACH-ConfigDedicated) and corresponding indications.
  • the network device may indicate, in the system message, a plurality of DL BWPs that can be used to send msg.2, and time-frequency resources and/or preambles for transmitting msg.1 corresponding to each DL BWP, and then indicate the UE by using RRC signaling. Use one or more of them to send a DL BWP for msg.2.
  • the network device may further indicate a DL BWP index, for example, including index information in an RRC IE indicating a DL BWP for transmitting msg.2.
  • the random access method is applicable to contention-based random access, and the random access may be initiated by the UE, or may be triggered by the network device to initiate the random access.
  • the network device may trigger the UE to initiate the contention-based random access through DCI or RRC signaling.
  • the network device may further instruct the UE to send a DL BWP (eg, DL BWP index) of msg.2.
  • a DL BWP eg, DL BWP index
  • the user equipment can determine to receive the DL BWP of msg.2, and then listen to and receive msg.2 on the DL BWP.
  • the network device may further indicate the first DL BWP and the at least one preamble corresponding to the first DL BWP, and the first preamble that belongs to the indication corresponds to the first DL BPW In the case of at least one preamble, it is determined that the first DL BWP is used to send msg.2.
  • the network device may further indicate the first DL BWP and the at least one time-frequency resource for transmitting the preamble corresponding to the first DL BWP, and the first time-frequency of receiving the first preamble In the case where the resource belongs to the indicated at least one time-frequency resource for transmitting the preamble corresponding to the first DL BWP, it is determined that the first DL BWP is used for transmitting msg.2.
  • the network device may not specify that the UE sends the preamble set and/or the time-frequency resource set that can be used by the msg.1, and may also specify that the UE sends the msg. .1 a preamble set and/or a time-frequency resource set that can be used, where the time-frequency resource refers to a PRACH resource or a UL BWP including a PRACH resource, but is not limited thereto.
  • the UE may select to send the preamble and the resource of the msg.1 according to its own policy. In the specified case, the UE may select the preamble and the resource from the specified preamble set and/or the resource set, specifically Description will be made in Example 2.
  • the network device can use the foregoing indication and the time for transmitting msg.1 corresponding to the DL BWP for transmitting msg.2.
  • a frequency resource (a PRACH resource or a UL BWP containing a PRACH resource) and/or a preamble, which specifies a preamble set and/or a set of resources that the UE can use.
  • the network device can specify that the UE uses one or more preambles and/or resources corresponding to the DL BWPs that can be used to send msg.2.
  • the network device can inform the UE that one or more DL BWPs are available for transmitting msg.2, and the UE then selects preambles and/or resources based on the information.
  • the network device may receive the preamble on the configured time-frequency resource, and send msg.2 on the determined DL BWP, where the msg.2 may include scheduling the user equipment to send the third message (msg.3) Scheduling information. Therefore, after receiving the msg.2, the user equipment may send the msg.3 to the network device according to the scheduling information included in the msg.2 (step 205), as shown in FIG. 2, in the msg.3. Contains the identifier (UE ID) of the user equipment, such as C-RNTI.
  • UE ID the identifier of the user equipment
  • the network device may receive the msg.3 at the scheduled location and determine the user equipment that initiated the random access according to the UE identifier included in the msg.3, and send the msg.4 to the user equipment (step 206). To ensure normal access of the user equipment.
  • the network device may send the msg.4 by sending the DL BWP of the above msg.2; or send the msg by the DL BWP (active DL BWP) initiated by the user equipment to activate the pre-contention based on the contention.
  • the msg.4 is sent by the default DL BWP (default DL BWP) configured for the user equipment; or The msg.4 is sent by the activated DL BWP when the user equipment initiates the DL BWP before the contention-based random access activation does not time out; or the activated DL BWP before the user equipment initiates the contention-based random access In the case of a timeout, the msg.4 is sent by the default DL BWP configured for the user device.
  • the UE When one or more of the configured DL BWPs of the user equipment are activated, if the user equipment is configured with a default DL BWP, the UE initiates a timer for each activated BWP. When the UE receives the control information, the UE resets the timer value corresponding to the DL BWP that sent the control information. When the timer value is 0, that is, timeout, the user equipment switches to the default DL BWP.
  • the DL BWP for transmitting msg.2 is determined based on receiving the preamble and/or transmitting the time-frequency resource of the preamble. In the foregoing embodiment, when determining the DL BWP for transmitting msg.2, the above-described correspondence relationship indicated by the network device is utilized.
  • the DL BWP of msg.2 may be determined according to msg.1 sent by the user equipment without using the correspondence.
  • the network device receives the msg.1 sent by the user equipment, where the msg.1 includes indication information indicating that the DL BWP of the msg.2 is sent, and the indication information is, for example, a DL BWP index or a user identifier (C). - RNTI), the network device determines to transmit a DL BWP of msg.2 according to the indication information, and transmits msg.2 on the determined DL BWP.
  • the indication information is, for example, a DL BWP index or a user identifier (C).
  • C user identifier
  • msg.1 is not limited to being used for random access, for example, msg.1 may include indication information and signals.
  • the signal can be located in one or more symbols for uplink timing/channel estimation/channel quality measurements and the like. It can be a predefined signal, such as a sequence signal, and can also be called a Preamble, a pilot, a reference signal, and the like.
  • the indication information indicating the DL BWP for transmitting msg.2 may be carried in the msg.1, and the indication information may be bit information, and the DL that can be used to send the msg.2 is configured or indicated in the network device.
  • the user equipment can inform the network device to send the DL BWP of msg.2 through the above indication information (such as DL BWP index, the identifier of the user equipment (UE ID), such as C-RNTI) carried by msg.1.
  • the network device does not need to consider the time-frequency resource or preamble of the preamble after receiving the msg.1, and does not need to consider the above correspondence, and can directly determine the DL that sends the msg.2 according to the indication information carried in the msg.1. BWP.
  • the network device may also consider the time-frequency resource or the preamble for transmitting the preamble, and the corresponding relationship, and decide to send the DL BWP of msg.2 after comprehensive consideration.
  • the network device may indicate each preamble corresponding to each DL BWP, and according to the foregoing indication information, the received preamble used by the msg.1, and the indicated respective preamble corresponding to each DL BWP determine to send the msg.2. DL BWP.
  • the network device may indicate each time-frequency resource for transmitting msg.1 corresponding to each DL BWP, and receive the time-frequency resource of the msg.1 according to the foregoing indication information, and the indicated corresponding to each DL BWP.
  • the respective time-frequency resources for transmitting msg.1 determine the DL BWP for transmitting msg.2.
  • the network device may indicate each preamble corresponding to each DL BWP and each time-frequency resource corresponding to each DL BWP for transmitting msg.1, and use the received msg.1 according to the foregoing indication information.
  • the preamble receives the time-frequency resource of the msg.1, and the indicated respective preambles corresponding to the respective DL BWPs determine the DL BWPs for transmitting the msg.2, and the indicated times for transmitting the msg.1 corresponding to the respective DL BWPs.
  • the frequency resource determines the DL BWP that sends msg.2.
  • the network device may determine, according to the received time-frequency resource used by msg.1 and/or the preamble and/or the indication information carried by the msg.1, to send the DL BWP of msg.2 to send the Msg.2. Thereby, normal access of the UE is guaranteed.
  • FIG. 10 is a schematic diagram of the method. Referring to Figure 10, the method includes:
  • Step 1001 The user equipment determines to receive the DL BWP of msg.2;
  • Step 1002 The user equipment selects a first time-frequency resource from at least one time-frequency resource for transmitting a preamble corresponding to the DL BWP, and selects a first preamble from at least one preamble corresponding to the DL BWP. Sending a first preamble on the selected first time-frequency resource;
  • Step 1003 The user equipment monitors and receives the msg.2 on the DL BWP.
  • the time-frequency resource may be a PRACH resource
  • the first preamble is a preamble used by msg.1 (random access request)
  • the msg.2 is a random access response.
  • the UE may initiate the random access by itself, or may initiate the random access according to the trigger of the network device.
  • the network device may indicate the first DL BWP and the at least one time-frequency resource corresponding to the first DL BWP for transmitting the preamble, and/or, And a second DL BWP and at least one time-frequency resource corresponding to the second DL BWP for transmitting the preamble.
  • the user equipment can receive the indication and determine to receive the DL BWP of msg.2 according to the indication.
  • the network device may indicate the first DL BWP and at least one preamble corresponding to the first DL BWP, and/or the second DL BWP and the second DL At least one preamble corresponding to the BWP.
  • the user equipment can receive the indication and determine to receive the DL BWP of msg.2 according to the indication.
  • the network device may instruct the UE to send a DL BWP of msg.2 when the UE is triggered to perform contention-based random access, whereby the UE may according to the indication. Determine the DL BWP that receives msg.2.
  • step 1002 in the case that the network device does not specify to send the preamble set and/or the time-frequency resource set corresponding to one DL BWP used by the preamble, that is, the UE initiates the random access or the network device triggers the UE to initiate. If the random access is not specified, the UE may send the first preamble in the following manner when the UE can only activate one UL BWP at the same time.
  • the UE selects a time-frequency resource for transmitting the first preamble from the currently activated UL BWP to send the first preamble.
  • the UE may switch to another UL BWP including a PRACH resource and use the PRACH resource therein to send the first preamble.
  • the UE may switch to the allocated other unactivated UL BWP including the PRACH resource for transmitting the preamble, and select the PRACH resource for sending the first preamble to send the first preamble.
  • the UE may switch to a UL BWP including a PRACH resource for transmitting a preamble, except for all allocated UL BWPs, and select a PRACH resource for transmitting the first preamble to send the first preamble.
  • the UE may send the first preamble in the following manner.
  • the UE may activate the allocated other unactivated UL BWP including the PRACH resource for transmitting the preamble, and select the PRACH resource for sending the first preamble to send the first A preamble.
  • the UE may activate or switch to another UL BWP including a PRACH resource and transmit the first preamble using the PRACH resource therein.
  • the UE may activate the UL BWP including the PRACH resource for transmitting the preamble except for all the allocated UL BWPs, and select the PRACH resource for sending the first preamble to send the First preamble.
  • the UE may switch the at least one activated UL BWP to the allocated other unactivated UL BWPs that include the PRACH resources used to send the preamble, and select the PRACH resources used to send the first preamble to send the first preamble.
  • the UE may switch the at least one activated UL BWP to the UL BWP that includes the PRACH resource for transmitting the preamble, and select the PRACH resource for sending the first preamble to send the first preamble.
  • step 1002 in the case that the gNB specifies the preamble set and/or the time-frequency resource set corresponding to one DL BWP used by the preamble, that is, the network device triggers the UE to initiate the random access and performs the above designation.
  • the UE may send the first preamble by selecting a time-frequency resource for transmitting the first preamble from a time-frequency resource set and/or a preamble set used by the sending preamble specified by the network device.
  • the DL BWP of the msg.2 may be implicitly indicated to the UE by the network device by the designation, whereby the UE may determine to receive the DL BWP of msg.2 according to the indication.
  • the network device may further indicate at least one preamble corresponding to the first DL BWP and/or at least one preamble corresponding to the second DL BWP, and the UE may receive The indication, and according to the indication and the sending of the first preamble, the network device sends a DL BWP of msg.2.
  • the user equipment determines that the network device sends the msg.2.
  • the DL BWP is the first DL BWP.
  • the user equipment determines that the network device sends the msg.2 DL BWP is Second DL BWP.
  • step 1003 in a case where the UE can only receive one DL BWP at the same time, the UE can listen and receive msg.2 in the following manner.
  • the UE may listen and receive msg on the currently activated DL BWP. .2.
  • the UE may also switch to the determined DL BWP, and listen to and receive msg.2 in the determined DL BWP.
  • step 1003 in a case where the UE can receive two or more DL BWPs at the same time, the UE can listen and receive msg.2 in the following manner.
  • the UE may listen and receive msg on the currently activated DL BWP. .2.
  • the UE can activate or switch to another DL BWP to listen and receive msg.2.
  • the UE may activate the determined DL BWP described above, and listen to and receive the msg. 2 in the determined DL BWP.
  • the UE may switch one of the activated DL BWPs to the determined DL BWP, and listen to and receive the msg.2 in the determined DL BWP.
  • the determined DL BWP is the DL BWP corresponding to the msg.1 sent by the UE, that is, the time-frequency resource of the first preamble and/or the transmission msg.2 corresponding to the first preamble.
  • DL BWP the DL BWP corresponding to the msg.1 sent by the UE, that is, the time-frequency resource of the first preamble and/or the transmission msg.2 corresponding to the first preamble.
  • the msg.3 may be sent according to the scheduling information of the sending msg.3 included in the msg.2, where the identifier of the UE may be included in the msg.3, that is, UE ID.
  • the network device can receive the msg.3 at the scheduled location, and then uniquely determine the UE according to the UE ID included in the msg.3, and send msg.4 to the UE.
  • the specific transmission method is as described in Embodiment 1, and the description thereof is omitted here.
  • the UE can receive the msg.4, thereby completing the entire process of random access.
  • the msg.1 can also carry the indication information by using other embodiments on the network device side.
  • the UE may determine, according to the indication information carried by the msg.1 that it sends, the network device sends the DL BWP of the msg.2 to determine the DL BWP. Listen and receive msg.2.
  • the user equipment may send msg.1 to the network device, where the msg.1 includes indication information indicating that the network device sends a DL BWP of msg.2, where the indication information is bit information, and Determining, according to the indication information, a DL BWP that receives msg.2, and receiving msg.2 sent by the network device on the determined DL BWP.
  • the user equipment may further determine to receive the DL BWP of msg.2 according to the time-frequency resource that sends the msg.1 and/or the preamble used by the msg.1.
  • the user equipment may determine to receive the DL BWP of msg.2 according to the indication information, each preamble corresponding to each DL BWP indicated by the network device, and the preamble used by the msg.1.
  • the user equipment sends the time-frequency resource of the msg.1 according to the indication information, and each time-frequency resource for transmitting the msg.1 corresponding to each DL BWP indicated by the network device determines to receive the msg. 2 DL BWP.
  • the user equipment may send msg.1 to the network device, and according to the transmitted msg.1 (for example, the time-frequency resource of msg.1 and/or the indication carried by preamble and/or msg.1) Information) It is determined that the network device sends the DL BWP of msg.2, and the DL BWP listens and receives msg.2, thereby completing random access. Thereby, normal access of the UE is guaranteed.
  • the transmitted msg.1 for example, the time-frequency resource of msg.1 and/or the indication carried by preamble and/or msg.1
  • the network device sends the DL BWP of msg.2, and the DL BWP listens and receives msg.2, thereby completing random access. Thereby, normal access of the UE is guaranteed.
  • This embodiment provides a random access device, which may be configured in a network device, such as a gNB (base station in NR) or the like. Since the principle of solving the problem is similar to the method of the first embodiment, the specific implementation can refer to the implementation of the method of the first embodiment, and the details are not repeated.
  • a network device such as a gNB (base station in NR) or the like. Since the principle of solving the problem is similar to the method of the first embodiment, the specific implementation can refer to the implementation of the method of the first embodiment, and the details are not repeated.
  • the random access device 1100 includes a receiving unit 1101, a determining unit 1102, and a transmitting unit 1103.
  • the receiving unit 1101 receives a first preamble sent by the first user equipment at the first time-frequency resource, and the determining unit 1102 determines, according to the first preamble, a carrier bandwidth (DL BWP) for transmitting the second message (msg. 2A).
  • the transmitting unit 1103 transmits the msg.2A on the DL BWP.
  • the determining unit 1102 may determine, according to the received first preamble, for sending DL BWP for msg.2. This ensures normal access of the UE.
  • the random access device 1100 further includes a first indication unit 1104 indicating a first DL BWP and at least one preamble corresponding to the first DL BWP,
  • the first preamble belongs to the at least one preamble corresponding to the first DL BWP indicated by the first indication unit 1104.
  • the determining unit 1102 can determine the first DL BWP according to the indication of the first indicating unit 1104 and the first preamble.
  • the first indicator unit 1104 may further indicate the second DL BWP and the at least one preamble corresponding to the second DL BWP.
  • the receiving unit 1101 may further receive the second preamble sent by the second user equipment, where the second preamble belongs to At least one preamble corresponding to the second DL BWP indicated by the first indication unit 1104; the determining unit 1102 may further determine, according to the indication of the first indication unit 1104 and the second preamble, for sending the second message (msg. 2B) The second DL BWP; the transmitting unit 1103 may also send the msg.2B on the second DL BWP.
  • the first indication unit 1104 may perform the foregoing indication by using broadcast information, or system information and/or RRC signaling.
  • the random access device 1100 further includes a second indication unit 1105 indicating a first DL BWP and a first DL BWP corresponding to the first DL BWP for transmitting the preamble.
  • the first time-frequency resource belongs to the at least one time-frequency resource corresponding to the first DL BWP indicated by the second indication unit 1105.
  • the determining unit 1102 can determine the first DL BWP according to the indication of the second indication unit 1105 and the first time-frequency resource.
  • the second indication unit 1105 may further indicate the second DL BWP and the at least one time-frequency resource corresponding to the second DL BWP for transmitting the preamble; the receiving unit 1101 may also receive the second time-frequency resource.
  • a second preamble sent by the user equipment, where the second time-frequency resource belongs to the at least one time-frequency resource corresponding to the second DL BWP for transmitting the preamble indicated by the second indication unit 1105; the determining unit 1102 is further The indication of the second indication unit 1105 and the second time-frequency resource determination for transmitting the second message (msg. 2B) is a second DL BWP; the sending unit 1103 may also send on the second DL BPW The msg. 2B.
  • the second indication unit 1105 may perform the foregoing indication by using broadcast information, or system information and/or RRC signaling.
  • the random access device 1100 may further include: a trigger unit 1106, It may trigger the user equipment in its coverage to initiate contention-based random access.
  • a trigger unit 1106 It may trigger the user equipment in its coverage to initiate contention-based random access.
  • each user equipment is instructed to send a DL BWP of msg.2.
  • the user equipment is specified or not specified to send the msg.1.
  • the preamble set and/or resource set corresponding to one DL BWP is used.
  • the random access device 1100 may further include: a third indication unit 1107 indicating a first DL BWP and at least one preamble corresponding to the first DL BWP, the first Preamble belongs to at least one preamble corresponding to the first DL BPW indicated by the third unit; the determining unit 1102 is determined to send msg.2A according to the indication of the third indication unit 1107 and the first preamble The first DL BWP.
  • the random access device 1100 may further include: a fourth indication unit 1108 indicating the first DL BWP and the at least one corresponding to the first DL BWP for transmitting the preamble a frequency resource, the first time-frequency resource belongs to at least one time-frequency resource for transmitting a preamble corresponding to the first DL BWP indicated by the fourth indication unit 1108; the determining unit 1102 is configured according to the fourth indication unit
  • the indication of 1108 and the first time-frequency resource determination for transmitting msg.2A is the first DL BWP.
  • the receiving unit 1101 may further receive a third message (msg.3A) sent by the first user equipment, where the identifier of the first user equipment may be included in the msg.3A, and thus, the sending unit 1103 may Sending a fourth message (msg. 4A) to the first user equipment according to the identifier of the first user equipment.
  • a third message (msg.3A) sent by the first user equipment, where the identifier of the first user equipment may be included in the msg.3A
  • the sending unit 1103 may Sending a fourth message (msg. 4A) to the first user equipment according to the identifier of the first user equipment.
  • the sending unit 1103 may send the msg.4A by sending a DL BWP of msg.2A; or send the msg.4A by using a DL BWP initiated by the first user equipment to activate the pre-contention based random access; or Transmitting the msg.4A by a default DL BWP configured for the first user equipment; or transmitting the activated DL BWP by the activated DL BWP if the activated DL BWP before the first user equipment initiates the contention based random access does not time out msg.4A; or sending the msg.4A by default DL BWP configured for the first user equipment if the first user equipment initiates an active DL BWP timeout prior to contention based random access.
  • the msg.1 received by the receiving unit 1101 includes indication information indicating a DL BWP for transmitting msg.2, and the determining unit 1102 may determine, according to the indication information, a DL BWP for transmitting msg.2.
  • This embodiment can be used in combination with the previous embodiments.
  • the network device may determine, according to the received time-frequency resource used by msg.1 and/or the preamble and/or the indication information carried by the msg.1, to send the DL BWP of msg.2 to send the DL BWP. Msg.2. Thereby, normal access of the UE is guaranteed.
  • This embodiment provides a random access device, and the device may be configured on a user equipment. Since the principle of solving the problem is similar to the method of the second embodiment, the specific implementation can refer to the implementation of the method of the second embodiment, and the description of the same portions will not be repeated.
  • the random access device 1200 includes a determining unit 1201, a transmitting unit 1202, and a receiving unit 1203.
  • the determining unit 1201 determines to receive the DL BWP of the msg.2; the sending unit 1202 selects the first time-frequency resource from the at least one time-frequency resource for transmitting the preamble corresponding to the DL BWP, and corresponds to the DL BWP. Selecting the first preamble from the at least one preamble, transmitting the first preamble on the selected first time-frequency resource; the receiving unit 1203 listening and receiving the msg.2 on the DL BWP.
  • the receiving unit 1203 may further receive a first DL BWP indicated by the network device, and at least one time-frequency resource corresponding to the first DL BWP for transmitting the preamble, and/or the second DL.
  • the BWP and the at least one time-frequency resource for transmitting the preamble corresponding to the second DL BWP may be configured according to the first time-frequency resource that sends the first preamble, and the first DL indicated by the network device And the BWP and the at least one time-frequency resource for transmitting the preamble corresponding to the first DL BWP, and/or the second DL BWP and the at least one time-frequency resource for transmitting the preamble corresponding to the second DL BWP, determining to receive the msg .2 DL BWP.
  • the receiving unit 1203 may further receive the first DL BWP indicated by the network device and the at least one preamble corresponding to the first DL BWP, and/or the second DL BWP and the second DL
  • the at least one preamble corresponding to the BWP, the determining unit 1201 may be configured according to the first preamble, and the first DL BWP indicated by the network device, and at least one preamble corresponding to the first DL BWP, and/or the second DL BWP and At least one preamble corresponding to the second DL BWP determines to receive the DL BWP of msg.2.
  • the determining unit 1201 may determine, according to the DL BWP for transmitting the msg.2 that is triggered by the network device when the user equipment performs the contention-based random access, to determine the DL that receives the msg.2. BWP.
  • the sending unit 1202 may pass the following The way to send msg.1.
  • the currently activated UL BWP includes a PRACH resource for transmitting msg.1, selecting a PRACH resource for transmitting msg.1 from the current activated UL BWP and preamble transmitting the msg.1, or
  • activated UL BWP does not reach the maximum number, activate the allocated other unactivated UL BWP including the PRACH resource for transmitting msg.1, select the PRACH resource for transmitting msg.1 and the preamble to send the Msg.1; or,
  • Switching at least one activated UL BWP to the allocated other unactivated UL BWPs including PRACH resources for transmitting msg.1, selecting PRACH resources for transmitting msg.1 and preamble to send the msg.1; or
  • the sending unit 1202 may transmit from the network device designation.
  • the time-frequency resource for transmitting msg.1 and the preamble selected in the preamble set and/or resource set used by msg.1 are sent to the msg.1.
  • the msg.1 sent by the sending unit 1202 carries the indication information indicating the DL BWP for transmitting the msg.2.
  • This embodiment can be used in combination with the previous embodiments.
  • the receiving unit 1203 may be in the currently activated DL.
  • the BWP listens and receives the msg.2.
  • the receiving unit 1203 may also switch to the determined DL BWP, and listen to and receive the msg.2 in the determined DL BWP;
  • the receiving unit 1203 may also activate the determined DL BWP and listen to and receive the msg. 2 in the determined DL BWP.
  • the receiving unit 1203 may also switch one of the activated DL BWPs to the determined DL BWP, and listen to and receive the msg.2 in the determined DL BWP.
  • the user equipment may send msg.1 to the network device, and according to the transmitted msg.1 (for example, transmitting the time-frequency resource of msg.1 and/or the indication carried by the preamble and/or msg.1) Information) It is determined that the network device sends the DL BWP of msg.2, and the DL BWP listens and receives msg.2, thereby completing random access. Thereby, normal access of the UE is guaranteed.
  • the transmitted msg.1 for example, transmitting the time-frequency resource of msg.1 and/or the indication carried by the preamble and/or msg.1 Information
  • the embodiment of the present invention further provides a network device, such as a gNB (base station in the NR), and the like, where the network device includes the random access device described in Embodiment 3.
  • a network device such as a gNB (base station in the NR), and the like, where the network device includes the random access device described in Embodiment 3.
  • FIG. 13 is a schematic structural diagram of an embodiment of a network device according to an embodiment of the present invention.
  • network device 1300 can include a central processing unit (CPU) 1301 and memory 1302; and memory 1302 is coupled to central processing unit 1301.
  • the memory 1302 can store various data; in addition, a program for information processing is stored, and the program is executed under the control of the central processing unit 1301 to receive various information transmitted by the user equipment and to transmit various information to the user equipment.
  • the function of the random access device described in Embodiment 3 may be integrated into the central processing unit 1301, and the central processing unit 1301 implements the function of the random access device described in Embodiment 3, wherein The functions of the access device are incorporated herein and will not be described again.
  • the random access device of Embodiment 3 may be configured separately from the central processing unit 1301.
  • the random access device may be configured as a chip connected to the central processing unit 1301, and controlled by the central processing unit 1301. To realize the function of the random access device.
  • the network device 1300 may further include: a transceiver 1303, an antenna 1304, and the like; wherein the functions of the foregoing components are similar to the prior art, and details are not described herein again. It should be noted that the network device 1300 does not have to include all the components shown in FIG. 13; in addition, the network device 1300 may further include components not shown in FIG. 8, and reference may be made to the prior art.
  • the network device of this embodiment may determine, according to the received time-frequency resource used by msg.1 and/or the preamble and/or the indication information carried by the msg.1, to send the DL BWP of msg.2 to send the msg. .2. Thereby, normal access of the UE is guaranteed.
  • the embodiment of the present invention further provides a user equipment, where the user equipment includes the random access device described in Embodiment 4.
  • FIG. 14 is a schematic diagram of the composition of a user equipment according to an embodiment of the present invention.
  • the user equipment 1400 can include a central processor 1401 and a memory 1402; the memory 1402 is coupled to the central processor 1401.
  • the figure is exemplary; other types of structures may be used in addition to or in place of the structure to implement telecommunications functions or other functions.
  • the function of the random access device of Embodiment 4 may be integrated into the central processing unit 1401, and the function of the random access device described in Embodiment 4 is implemented by the central processing unit 1401, wherein the random access device is implemented.
  • the functions of the device are incorporated herein and will not be described again.
  • the random access device of Embodiment 4 may be configured separately from the central processing unit 1401.
  • the random access device may be configured as a chip connected to the central processing unit 1401, and controlled by the central processing unit 1401. To realize the function of the random access device.
  • the user equipment 1400 may further include: a communication module 1403, an input unit 1404, an audio processing unit 1405, a display 1406, and a power supply 1407. It should be noted that the user equipment 1400 does not have to include all the components shown in FIG. 14; in addition, the user equipment 1400 may also include components not shown in FIG. 14, and reference may be made to the prior art.
  • central processor 140 also sometimes referred to as a controller or operational control, can include a microprocessor or other processor device and/or logic device that receives input and controls each of user devices 1400. The operation of the part.
  • the memory 1402 may be, for example, one or more of a buffer, a flash memory, a hard drive, a removable medium, a volatile memory, a non-volatile memory, or other suitable device.
  • the above configuration-related information can be stored, and a program for executing the related information can be stored.
  • the central processing unit 1401 can execute the program stored by the memory 1402 to implement information storage or processing and the like.
  • the functions of other components are similar to those of the existing ones and will not be described here.
  • the various components of user device 1400 can be implemented by dedicated hardware, firmware, software, or a combination thereof, without It is within the scope of the invention.
  • the msg.1 may be sent to the network device, and according to the transmitted msg.1 (for example, the time-frequency resource of the msg.1 and/or the indication information carried by the preamble and/or the msg.1 are transmitted. Determining that the network device sends the DL BWP of msg.2, and listens to and receives msg.2 in the DL BWP, thereby completing random access. Thereby, normal access of the UE is guaranteed.
  • the transmitted msg.1 for example, the time-frequency resource of the msg.1 and/or the indication information carried by the preamble and/or the msg.1 are transmitted. Determining that the network device sends the DL BWP of msg.2, and listens to and receives msg.2 in the DL BWP, thereby completing random access. Thereby, normal access of the UE is guaranteed.
  • the embodiment of the present invention further provides a communication system, which includes a network device and a user equipment.
  • the network device is, for example, the network device 1300 described in Embodiment 5.
  • the user equipment is, for example, the user equipment 1400 described in Embodiment 6.
  • the network device may be, for example, a gNB in the NR, which includes the conventional components and functions of the network device in addition to the functions of the random access device described in Embodiment 3, as described in Embodiment 5. , will not repeat them here.
  • the user equipment is, for example, a UE of the gNB service, which includes the conventional components and functions of the user equipment, as described in Embodiment 6, in addition to the functions of the random access device described in Embodiment 4. I will not repeat them here.
  • Embodiments of the present invention also provide a computer readable program, wherein when the program is executed in a network device, the program causes a computer to execute the method described in Embodiment 1 in the network device.
  • An embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes a computer to execute the method described in Embodiment 1 in a network device.
  • the embodiment of the present invention further provides a computer readable program, wherein when the program is executed in a user equipment, the program causes a computer to execute the method described in Embodiment 2 in the user equipment.
  • An embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes a computer to execute the method described in Embodiment 2 in a user equipment.
  • the above apparatus and method of the present invention may be implemented by hardware or by hardware in combination with software.
  • the present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps.
  • Logic components such as field programmable logic components, microprocessors, processors used in computers, and the like.
  • the invention also relates to A storage medium for storing the above programs, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.
  • the method/apparatus described in connection with the embodiments of the invention may be embodied directly in hardware, a software module executed by a processor, or a combination of both.
  • one or more of the functional block diagrams shown in FIG. 11 and/or one or more combinations of functional block diagrams may correspond to each of the computer program flows.
  • Software modules can also correspond to individual hardware modules. These software modules may correspond to the respective steps shown in FIG. 3, respectively.
  • These hardware modules can be implemented, for example, by curing these software modules using a Field Programmable Gate Array (FPGA).
  • FPGA Field Programmable Gate Array
  • the software module can reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.
  • a storage medium can be coupled to the processor to enable the processor to read information from, and write information to, the storage medium; or the storage medium can be an integral part of the processor.
  • the processor and the storage medium can be located in an ASIC.
  • the software module can be stored in the memory of the mobile terminal or in a memory card that can be inserted into the mobile terminal.
  • the software module can be stored in the MEGA-SIM card or a large-capacity flash memory device.
  • One or more of the functional blocks described in the figures and/or one or more combinations of functional blocks may be implemented as a general purpose processor, digital signal processor (DSP) for performing the functions described herein.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • One or more of the functional blocks described with respect to the figures and/or one or more combinations of functional blocks may also be implemented as a combination of computing devices, eg, a combination of a DSP and a microprocessor, multiple microprocessors One or more microprocessors in conjunction with DSP communication or any other such configuration.
  • Supplementary note 1 a random access method, the method is applied to a network device, wherein the method includes:
  • the network device receives a first message (msg.1) sent by the user equipment, where the msg.1 includes an indication to send Indication information of a carrier bandwidth (DL BWP) of the second message (msg. 2), the indication information being bit information;
  • DL BWP carrier bandwidth
  • the network device transmits msg.2 on the determined DL BWP.
  • the network device indicates each preamble corresponding to each DL BWP
  • the network device determines, according to the indication information, the preamble used by the msg.1 and the indicated preamble corresponding to each DL BWP to determine a DL BWP for transmitting msg.2.
  • the network device indicates each time-frequency resource corresponding to each DL BWP for transmitting msg.1;
  • the network device receives the time-frequency resource of the msg.1 according to the indication information, and the indicated time-frequency resources for transmitting the msg.1 corresponding to the respective DL BWPs to determine the DL BWP for transmitting the msg.2.
  • Supplementary note 5 is a random access method, the method being applied to a user equipment, wherein the method includes:
  • the user equipment sends msg.1 to the network device, where the msg.1 includes indication information indicating that the network device sends a carrier bandwidth (DL BWP) of the second message (msg. 2), where the indication information is bit information. ;
  • DL BWP carrier bandwidth
  • the user equipment receives msg.2 sent by the network device on the determined DL BWP.
  • the user equipment further determines to receive according to the indication information, and the time-frequency resource of the msg.1 and/or the preamble used by the msg.1. DL BWP for msg.2.
  • the user equipment determines to receive the DL BWP of msg.2 according to the indication information, each preamble corresponding to each DL BWP indicated by the network device, and a preamble used by the msg.1.
  • Supplementary note 8 the method according to the supplementary note 6 or 7, wherein
  • the user equipment sends the time-frequency resource of the msg.1 according to the indication information, and each time-frequency resource for transmitting the msg.1 corresponding to each DL BWP indicated by the network device determines to receive the msg.2 DL BWP.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

一种随机接入方法、装置和通信系统，其中，所述方法包括：网络设备在第一时频资源接收第一用户设备发送的第一前导码(preamble)；所述网络设备根据所述第一preamble确定发送第二消息(msg.2)的第一载波带宽(DL BWP)；所述网络设备在所述第一DL BWP上发送所述msg.2A。通过该方法，基站根据接收到的用户设备发送的随机接入请求所使用的时频资源和/或preamble和/或随机接入请求所携带的指示信息就能确定反馈RAR的DL BWP，保证了用户设备的正常接入。

Description

随机接入方法、装置以及通信系统 技术领域
本发明涉及通信领域，特别涉及一种随机接入方法、装置以及通信系统。
背景技术
随机接入过程包括非竞争的随机接入和基于竞争的随机接入。在非竞争的随机接入过程中，用户设备(User Equipment，UE)使用由网络侧(例如基站)指定的随机接入前导(preamble)和物理随机接入信道(Physical Random Access Channel，PRACH)进行随机接入。在基于竞争的随机接入过程中，UE可以选择preamble和PRACH进行随机接入。
为了支持快速增长的业务量和日益繁多的新业务，全球各研究机构及标准化组织先后启动了第五代(5G)无线通信系统的研究。其中，第三代合作伙伴计划(3rd Generation Partnership Project，3GPP)在研究过程中定义了大规模机器类通信(mMTC，massive Machine Type Communications)、增强的移动宽带(eMBB，enhanced Mobile Broadband)和超可靠低时延通信(uRLLC，ultra-Reliable Low Latency Communication)等多种应用场景。
应该注意，上面对技术背景的介绍只是为了方便对本发明的技术方案进行清楚、完整的说明，并方便本领域技术人员的理解而阐述的。不能仅仅因为这些方案在本发明的背景技术部分进行了阐述而认为上述技术方案为本领域技术人员所公知。
发明内容
发明人发现，在新无线(New Radio，NR)系统中，引入了载波带宽(bandwidth part，BWP)的概念，一个DL(下行)/UL(上行)带宽内包含多个BWP。每个UE可以被配置一个或多个DL/UL BWP，同一时刻使用配置的其中一个DL/UL BWP接收/发送上下行数据。基站通过无线资源控制(Radio Resource Control，RRC)信令告知UE每个DL/UL BWP的起始PRB index(或称起始PRB到下行带宽中第一个PRB的偏移值)，子载波间隔，物理资源块(Physical Resource Block，PRB)数(或者带宽)，循环前缀(Cyclic Prefix，CP)长度等信息。不同UE的DL/UL BWP配置可能 不同。在此场景下，若UE进行基于竞争的随机接入，则由于基站不能根据接收到的消息1(msg.1)唯一确定一个UE，进而不能确定发送随机接入响应(Random Access Response，RAR)应使用的DL BWP，这就造成随机接入无法正常进行。
为了解决上述问题的至少一个，本发明实施例提供了一种随机接入方法、装置以及通信系统。
根据本发明实施例的第一方面，提供了一种随机接入方法，其中，所述方法包括：
网络设备在第一时频资源接收第一用户设备发送的第一前导码(preamble)；
所述网络设备根据所述preamble确定发送第二消息(msg.2A)的第一载波带宽(DL BWP)；
所述网络设备在所述第一DL BWP上发送所述msg.2A。
根据本发明实施例的第二方面，提供了一种随机接入方法，其中，所述方法包括：
用户设备在第一时频资源上发送第一preamble；
所述用户设备根据所述第一preamble确定接收msg.2的DL BWP；
所述用户设备在所述DL BWP上监听并接收所述msg.2。
根据本发明实施例的第三方面，提供了一种随机接入装置，配置于网络设备，其中，所述装置包括：
接收单元，其在第一时频资源接收第一用户设备发送的第一前导码(preamble)；
确定单元，其根据所述preamble确定发送第二消息(msg.2A)的第一载波带宽(DL BWP)；
发送单元，其在所述第一DL BWP上发送所述msg.2A。
根据本发明实施例的第四方面，提供了一种随机接入装置，配置于用户设备，其中，所述装置包括：
发送单元，其在第一时频资源上发送第一preamble；
确定单元，其根据所述第一preamble确定接收msg.2的DL BWP；
接收单元，其在所述DL BWP上监听并接收所述msg.2。
根据本发明实施例的第五方面，提供了一种网络设备，其中，所述网络设备包括前述第三方面所述的装置。
根据本发明实施例的第六方面，提供了一种用户设备，其中，所述用户设备包括前述第四方面所述的装置。
根据本发明实施例的第七方面，提供了一种通信系统，所述通信系统包括前述第六方面所述的用户设备和前述第五方面所述的网络设备。
根据本发明实施例的其它方面，提供了一种计算机可读程序，其中当在网络设备中执行所述程序时，所述程序使得计算机在所述网络设备中执行前述第一方面所述的方法。
根据本发明实施例的其它方面，提供了一种存储有计算机可读程序的存储介质，其中所述计算机可读程序使得计算机在网络设备中执行前述第一方面所述的方法。
根据本发明实施例的其它方面，提供了一种计算机可读程序，其中当在用户设备中执行所述程序时，所述程序使得计算机在所述用户设备中执行前述第二方面所述的方法。
根据本发明实施例的其它方面，提供了一种存储有计算机可读程序的存储介质，其中所述计算机可读程序使得计算机在用户设备中执行前述第二方面所述的方法。
本发明实施例的有益效果在于：基站根据接收到的用户设备发送的preamble和/或随机接入请求(msg.1)所携带的指示信息就能确定反馈随机接入响应(msg.2)的DL BWP，保证了用户设备的正常接入。
参照后文的说明和附图，详细公开了本发明的特定实施方式，指明了本发明的原理可以被采用的方式。应该理解，本发明的实施方式在范围上并不因而受到限制。在所附权利要求的精神和条款的范围内，本发明的实施方式包括许多改变、修改和等同。
针对一种实施方式描述和/或示出的特征可以以相同或类似的方式在一个或更多个其它实施方式中使用，与其它实施方式中的特征相组合，或替代其它实施方式中的特征。
应该强调，术语“包括/包含”在本文使用时指特征、整件、步骤或组件的存在，但并不排除一个或更多个其它特征、整件、步骤或组件的存在或附加。
附图说明
在本发明实施例的一个附图或一种实施方式中描述的元素和特征可以与一个或更多个其它附图或实施方式中示出的元素和特征相结合。此外，在附图中，类似的标号表示几个附图中对应的部件，并可用于指示多于一种实施方式中使用的对应部件。
所包括的附图用来提供对本发明实施例的进一步的理解，其构成了说明书的一部 分，用于例示本发明的实施方式，并与文字描述一起来阐释本发明的原理。显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其它的附图。在附图中：
图1是本发明实施例的通信系统的示意图；
图2是本发明实施例的随机接入方法的交互示意图；
图3是实施例1的随机接入方法示意图；
图4是对PRACH资源划分集合的一个实施方式的示意图；
图5是对PRACH资源划分集合的另一个实施方式的示意图；
图6是对PRACH资源划分集合的再一个实施方式的示意图；
图7是对PRACH资源划分集合的又一个实施方式的示意图；
图8是对preamble划分集合的一个实施方式的示意图；
图9是对PRACH资源和preamble划分集合的一个实施方式的示意图；
图10是实施例2的随机接入方法的示意图；
图11是实施例3的随机接入装置的示意图；
图12是实施例4的随机接入装置的示意图；
图13是实施例5的网络设备的示意图；
图14是实施例6的用户设备的示意图。
具体实施方式
参照附图，通过下面的说明书，本发明的前述以及其它特征将变得明显。在说明书和附图中，具体公开了本发明的特定实施方式，其表明了其中可以采用本发明的原则的部分实施方式，应了解的是，本发明不限于所描述的实施方式，相反，本发明包括落入所附权利要求的范围内的全部修改、变型以及等同物。
在本发明实施例中，术语“第一”、“第二”等用于对不同元素从称谓上进行区分，但并不表示这些元素的空间排列或时间顺序等，这些元素不应被这些术语所限制。术语“和/或”包括相关联列出的术语的一种或多个中的任何一个和所有组合。术语“包含”、“包括”、“具有”等是指所陈述的特征、元素、元件或组件的存在，但并不排除存在或添加一个或多个其他特征、元素、元件或组件。
在本发明实施例中，单数形式“一”、“该”等包括复数形式，应广义地理解为 “一种”或“一类”而并不是限定为“一个”的含义；此外术语“所述”应理解为既包括单数形式也包括复数形式，除非上下文另外明确指出。此外术语“根据”应理解为“至少部分根据……”，术语“基于”应理解为“至少部分基于……”，除非上下文另外明确指出。
在本发明实施例中，术语“通信网络”或“无线通信网络”可以指符合如下任意通信标准的网络，例如长期演进(LTE，Long Term Evolution)、增强的长期演进(LTE-A，LTE-Advanced)、宽带码分多址接入(WCDMA，Wideband Code Division Multiple Access)、高速报文接入(HSPA，High-Speed Packet Access)等等。
并且，通信系统中设备之间的通信可以根据任意阶段的通信协议进行，例如可以包括但不限于如下通信协议：1G(generation)、2G、2.5G、2.75G、3G、4G、4.5G以及未来的5G、新无线(NR，New Radio)等等，和/或其他目前已知或未来将被开发的通信协议。
在本发明实施例中，术语“网络设备”例如是指通信系统中将用户设备接入通信网络并为该用户设备提供服务的设备。网络设备可以包括但不限于如下设备：基站(BS，Base Station)、接入点(AP、Access Point)、发送接收点(TRP，Transmission Reception Point)、广播发射机、移动管理实体(MME、Mobile Management Entity)、网关、服务器、无线网络控制器(RNC，Radio Network Controller)、基站控制器(BSC，Base Station Controller)等等。
其中，基站可以包括但不限于：节点B(NodeB或NB)、演进节点B(eNodeB或eNB)以及5G基站(gNB)，等等，此外还可包括远端无线头(RRH，Remote Radio Head)、远端无线单元(RRU，Remote Radio Unit)、中继(relay)或者低功率节点(例如femto、pico等等)。并且术语“基站”可以包括它们的一些或所有功能，每个基站可以对特定的地理区域提供通信覆盖。术语“小区”可以指的是基站和/或其覆盖区域，这取决于使用该术语的上下文。
在本发明实施例中，术语“用户设备”(UE，User Equipment)或者“终端设备”(TE，Terminal Equipment)例如是指通过网络设备接入通信网络并接收网络服务的设备。用户设备可以是固定的或移动的，并且也可以称为移动台(MS，Mobile Station)、终端、用户台(SS，Subscriber Station)、接入终端(AT，Access Terminal)、站，等等。
其中，用户设备可以包括但不限于如下设备：蜂窝电话(Cellular Phone)、个人数字助理(PDA，Personal Digital Assistant)、无线调制解调器、无线通信设备、手持设备、机器型通信设备、膝上型计算机、无绳电话、智能手机、智能手表、数字相机，等等。
再例如，在物联网(IoT，Internet of Things)等场景下，用户设备还可以是进行监控或测量的机器或装置，例如可以包括但不限于：机器类通信(MTC，Machine Type Communication)终端、车载通信终端、设备到设备(D2D，Device to Device)终端、机器到机器(M2M，Machine to Machine)终端，等等。
以下通过示例对本发明实施例的场景进行说明，但本发明不限于此。
图1是本发明实施例的通信系统的示意图，示意性说明了以用户设备和网络设备为例的情况，如图1所示，通信系统100可以包括：网络设备101和用户设备102。为简单起见，图1仅以一个用户设备为例进行说明。网络设备101例如为NR的网络设备gNB。
在本发明实施例中，网络设备101和用户设备102之间可以进行现有的业务或者未来可实施的业务。例如，这些业务包括但不限于：增强的移动宽带(eMBB，enhanced Mobile Broadband)、大规模机器类型通信(mMTC，massive Machine Type Communication)和高可靠低时延通信(URLLC，Ultra-Reliable and Low-Latency Communication)，等等。
其中，用户设备102可以向网络设备101发送数据，例如使用免授权传输方式。网络设备101可以接收一个或多个用户设备102发送的数据，并向用户设备102反馈信息(例如确认ACK/非确认NACK)信息，用户设备102根据反馈信息可以确认结束传输过程、或者还可以再进行新的数据传输，或者可以进行数据重传。
图2是本发明实施例的随机接入过程的示意图，示意性地说明了以UE和gNB为例的情况，如图2所示，在步骤201中，gNB可以触发UE发起基于竞争的随机接入，但步骤201是可选的，UE也可以自主发起基于竞争的随机接入过程；在步骤202中，gNB可以为UE进行各种配置或者也可以称为进行各种指示。本实施例对步骤201和步骤202的执行顺序不作限制。在步骤203中，UE向gNB发送msg.1，也即随机接入请求，msg.1也可以携带数据信息。在步骤204中，gNB在配置的发送msg.1的时频资源上接收msg.1，根据该msg.1确定反馈RAR的DL BWP，向UE发送msg.2， 也即随机接入响应(RAR)，该RAR中包含了调度UE发送msg.3的调度信息。在步骤205中，UE监听并接收RAR，根据接收到的RAR中包含的调度信息向gNB发送msg.3，在该msg.3中包含有该UE的标识。在步骤206中，gNB在调度msg.3的调度位置接收msg.3，根据该msg.3所包含的UE的标识唯一确定UE，向确定的UE发送msg.4。
下面结合附图对本发明实施例的各种实施方式进行说明。这些实施方式只是示例性的，不是对本发明的限制。
实施例1
本实施例提供了一种随机接入方法，该方法应用于网络设备，例如gNB(NR中的基站)等，图3是该方法的示意图，请参照图3，该方法包括：
步骤301：网络设备在第一时频资源接收第一用户设备发送的第一前导码(preamble)；
步骤302：所述网络设备根据所述第一preamble确定发送第二消息(msg.2A)的第一载波带宽(DL BWP)；
步骤303：所述网络设备在所述第一DL BWP上发送所述msg.2A。
在本实施例中，UE在一个时频资源上发送一个preamble作为随机接入请求，也称为msg.1。网络设备在相应的时频资源上检测到preamble，即可知道有UE发起了随机接入，进而向UE反馈随机接入响应(RAR)，也称为msg.2。
在本实施例中，发送该preamble所使用的时频资源可以是PRACH资源，但本实施例并不以此作为限制，发送该preamble所使用的时频资源也可以有其他叫法，或者也可以为其他资源等。
在本实施例中，网络设备可以根据接收到的该第一preamble所使用的时频资源和/或该第一preamble确定发送msg.2(称为msg.2A)的DL BWP(称为第一DL BWP)以发送该msg.2。由此，保证了UE的正常接入。
在一个实施方式中，网络设备可以指示第一DL BWP以及与第一DL BWP对应的至少一个preamble。例如，网络设备可以配置第一DL BWP与至少一个preamble的对应关系，以此来指示与第一DL BWP对应的至少一个preamble，网络设备可以根据该指示以及接收到的preamble(所述第一preamble)确定发送msg.2的DL BWP。例如，当接收到的上述第一preamble属于指示的与第一DL BWP对应的至少一个 preamble时，即可确定发送msg.2的DL BWP为该第一DL BWP。
在本实施方式中，网络设备还可以指示第二DL BWP以及与第二DL BWP对应的至少一个preamble，网络设备在接收到第二用户设备发送的第二preamble后，如果该第二preamble属于与第二DL BWP对应的至少一个preamble，则网络设备确定发送msg.2的DL BWP为该第二DL BWP，进而在该第二DL BPW上发送上述msg.2。
总之，在本实施方式中，网络设备可以根据接收到的preamble以及上述指示确定发送msg.2的DL BWP。例如，如果接收到的preamble(例如第一preamble)属于与第一DL BWP对应的至少一个preamble，则网络设备确定发送msg.2的DL BWP为第一DL BWP，如果接收到的preamble(例如第二preamble)属于与第二DL BWP对应的至少一个preamble，则网络设备确定发送msg.2的DL BWP为第二DL BWP。由此，网络设备根据接收到的preamble即可确定发送msg.2的DL BWP。
在另一个实施方式中，网络设备可以指示第一DL BWP以及与第一DL BWP对应的用于发送preamble的至少一个时频资源。例如，网络设备可以配置第一DL BWP与用于发送preamble的至少一个时频资源的对应关系，以此来指示与第一DL BWP对应的用于发送preamble的至少一个时频资源，网络设备可以根据该指示以及发送上述preamble(所述第一preamble)的时频资源(上述第一时频资源)确定发送msg.2的DL BWP。例如，当所述第一时频资源属于指示的与第一DL BWP对应的用于发送preamble的至少一个时频资源时，即可确定发送msg.2的DL BWP为该第一DL BWP。
在本实施方式中，网络设备还可以指示第二DL BWP以及与第二DL BWP对应的用于发送preamble的至少一个时频资源，网络设备在接收到第二用户设备发送的第二preamble后，如果发送该第二preamble的时频资源(例如第二时频资源)属于与第二DL BWP对应的用于发送preamble的至少一个时频资源，则网络设备确定发送msg.2的DL BWP为该第二DL BWP，进而在该第二DL BPW上发送上述msg.2。
总之，在本实施方式中，网络设备可以根据接收preamble的时频资源以及上述指示确定发送msg.2的DL BWP。例如，如果接收preamble的时频资源(例如第一时频资源)属于与第一DL BWP对应的用于发送preamble的至少一个时频资源，则网络设备确定发送msg.2的DL BWP为第一DL BWP，如果接收preamble的时频资源(例如第二时频资源)属于与第二DL BWP对应的用于发送preamble的至少一个 时频资源，则网络设备确定发送msg.2的DL BWP为第二DL BWP。由此，网络设备根据接收preamble的时频资源即可确定发送msg.2的DL BWP。
在前述两个实施方式中，上述第一用户设备和上述第二用户设备可以相同也可以不同，也就是说，同一个用户设备也有可能使用相同或不同的时频资源发送不同的preamble。
在前述两个实施方式中，对“与不同DL BWP对应的至少一个preamble”和“与不同DL BWP对应的用于发送preamble的至少一个时频资源”分别进行了说明，在具体实施过程中，上述两种实施方式也可以结合，例如网络设备同时指示了“与不同DL BWP对应的至少一个preamble”和“与不同DL BWP对应的用于发送preamble的至少一个时频资源”，网络设备在接收到preamble之后，即可根据该preamble和发送该preamble的时频资源并结合上述指示确定发送msg.2的DL BWP。
在本实施例中，网络设备可以配置多个用于发送msg.2的DL BWP，每个用于发送msg.2的DL BWP可以对应一个preamble集合和/或一个时频资源集合。
下面对DL BWP与时频资源集合的对应关系进行说明。
在本实施例的一个实施方式中，以上述可用于发送所述preamble的时频资源为PRACH资源为例，可用于发送所述preamble的所有PRACH资源可以被划分为一个以上的集合，一个集合的PRACH资源对应一个可用于发送msg.2的DL BWP。由此，网络设备在接收到preamble后，可以根据前述指示以及该preamble所使用的PRACH资源确定发送msg.2的DL BWP。
例如，可以根据PRACH资源的时域位置和/或频域位置对所有PRACH资源进行划分，例如将时域位置相同的PRACH资源划分为一个集合；或者将频域位置相同的PRACH资源划分为一个集合；或者将时域位置相同的PRACH资源划分为多个集合，或者，将频域位置相同的PRACH资源划分为多个集合。本实施例对PRACH资源集合的划分方式不作限制。
图4和图5分别示出了在所有PRACH资源配置于一个UL BWP的情况下PRACH资源的划分情况和不同的PRACH资源集合与发送RAR的DL BWP的对应关系，并且在图4和图5的示例中，以所有PRACH资源配置于用于初始接入的初始上行BWP(initial active UL BWP)为例。如图4所示，根据PRACH资源的时域位置，8个PRACH资源被分为4个集合，分别对应DL BWP 0～DL BWP 3。如图5所示，根据PRACH 资源的时域位置和频域位置，8个PRACH资源被分为4个集合，分别对应DL BWP0～DL BWP 3。
图6和图7分别示出了在所有PRACH资源配置于多个UL BWP的情况下PARCH资源的划分情况和不同的PRACH资源集合与发送RAR的DL BWP的对应关系，并且，在图6和图7的示例中，以所有PRACH资源配置于UL BWP 0和UL BWP 1为例。如图6所示，根据PRACH资源的频域位置，8个PRACH资源被分为2个集合，分别对应一个DL BWP，并且，一个集合的PRACH资源配置于一个UL BWP。如图7所示，根据PRACH资源的时域位置和频域位置，8个PRACH资源被分为4个集合，分别对应一个DL BWP，并且，其中2个集合的PRACH资源配置于一个UL BWP，另外2个集合的PRACH资源配置于另外一个UL BWP。
在本实施例中，在所有PRACH资源配置于多个UL BWP的情况下，网络设备所指示的与不同的DL BWP对应的可用于发送preamble的至少一个时频资源是指包含PRACH资源的UL BWP，也即，网络设备可以指示与不同的DL BWP对应的包含PRACH资源的不同的UL BWP。以图6为例，基站可以指示UL BWP0对应DL BWP0并且UL BWP 1对应DL BWP 1。再以图7为例，基站可以指示UL BWP0对应DL BWP 0和DL BWP 1并且UL BWP 1对应DL BWP 2和DL BWP 3。由此，网络设备可以根据该指示以及接收到的preamble所使用的PRACH资源所在的UL BWP，确定发送msg.2的DL BWP。例如，如果网络设备接收到的preamble所使用的PRACH资源属于UL BWP 1，而根据该指示，UL BWP 1对应DL BWP 2，则网络设备可以确定发送msg.2的DL BWP为DL BWP2，则网络设备可以在DL BWP 2上发送msg.2。
下面对DL BWP与preamble集合的对应关系进行说明。
在本实施例的一个实施方式中，除了将可用于发送preamble的所有PRACH资源划分为多个集合以分别对应不同的DL BWP以外，也可以将所有preamble划分为多个集合以分别对应不同的DL BWP。由此，网络设备在接收到preamble后，还可以参考发送该msg.1的preamble确定发送msg.2的DL BWP。
图8示出了preamble的划分情况和不同的preamble集合与DL BWP的对应关系。如图8所示，preamble集合#0对应DL BWP 0，preamble集合#1对应DL BWP 1，preamble集合#2对应DL BWP 2，preamble集合#3对应DL BWP 3。本实施例对preamble集合的划分方式不作限制，例如可以根据根索引(root index)进行划分，也 可以根据循环移位(cyclic shift)进行划分，还可以根据正交码(OCC)进行划分等。
前面对用于发送preamble的PRACH资源以及包含PRACH资源的UL BWP与DL BWP的对应关系，以及preamble与DL BWP的对应关系分别做了说明，在具体实施过程中，上述两种对应关系可以结合使用，例如，可用于发送所述preamble的所有PRACH资源被划分为多个集合，不同集合的PRACH资源对应不同的DL BWP，同时，所有preamble也被划分为多个集合，不同集合的preamble对应不同的DL BWP。再例如，包含可用于发送preamble的PRACH资源的UL BWP对应不同的DL BWP，同时，所有preamble被划分为多个集合，不同集合的preamble对应不同的DL BWP。
下面对DL BWP与preamble集合以及PRACH资源集合的对应关系进行说明。
图9示出了在所有PRACH资源配置于多个UL BWP的情况下PARCH资源的划分情况、preamble的划分情况、以及不同的preamble集合和PRACH资源集合与DL BWP的对应情况，并且，在图9的示例中，以所有PRACH资源配置于UL BWP 0和UL BWP 1为例。如图9所示，在UL BWP 0中，preamble被划分为2个集合，preamble集合#0和preamble集合#1，分别对应DL BWP 0和DL BWP 1，在UL BWP 1中，preamble也被划分为2个集合，preamble集合#0和preamble集合#1，分别对应DL BWP 2和DL BWP 3；并且，所有的PRACH资源被划分为两个集合，配置于UL BWP 0中的PRACH资源集合对应DL BWP 0和DL BWP 1，配置于UL BWP 1中的PRACH资源结合对应DL BWP 2和DL BWP 3。由此，网络设备在接收到preamble后，可以根据发送该preamble的PRACH资源确定两个DL BWP，即DL BWP 0和DL BWP 1，或者，DL BWP 2和DL BWP 3，再进一步根据接收到的preamble属于preamble集合#0还是属于preamble集合#1来最终确定发送msg.2的DL BWP。
在本实施例中，网络设备可以通过广播信息(PBCH)进行上述指示，也可以通过系统信息和/或RRC信令(例如group-specific RRC和/或UE-specific RRC)进行上述指示，但本发明不限于此。
如果在PBCH中指示可用于发送msg.2的DL BWP，则网络设备可以发送一个或多个位于不同频域位置的SSB(SS/PBCH block，同步信号广播信道块)，在每个SSB的PBCH中分别指示用于发送msg.2的DL BWP，在系统消息中指示与该DL BWP对应的发送msg.1的时频资源和/或preamble。
如果在系统信息和/或RRC信令指示可用于发送msg.2的DL BWP，则可用于发 送msg.1的时频资源和/或preamble，以及可用于发送msg.2的DL BWP可以在同一消息(例如系统信息/group-specific RRC/UE-specific RRC)的一个RRC IE中指示，例如：一个消息中包含一个或多个指示用于发送msg.2的DL BWP的RRC IE(common或者dedicated，例如BandwidthPart)，每个指示用于发送msg.2的DL BWP的IE中包含对应的时频资源和/或preamble(例如RACH-ConfigCommon，RACH-ConfigDedicated)，再例如，一个消息中包含一个或多个指示可用于发送msg.1的时频资源和/或preamble的RRC IE(例如RACH-ConfigCommon，RACH-ConfigDedicated)，每个指示可用于发送msg.1时频资源和/或preamble的IE对应的发送msg.2的DL BWP(例如BandwidthPart)。此外，可用于发送msg.1的时频资源和/或preamble，以及可用于发送msg.2的DL BWP也可以在同一消息的不同IE中指示，例如，一个消息中包含一个或多个指示SSB或CSI-RS配置的RRC IE(例如CSI-MeasConfig)，每个指示CSI-RS配置的IE中包含对应的时频资源和/或preamble(例如RACH-ConfigCommon，RACH-ConfigDedicated)及相应的指示用于发送msg.2的DL BWP。
并且，网络设备可以在系统消息中指示多个可用于发送msg.2的DL BWP以及每个DL BWP对应的用于发送msg.1的时频资源和/或preamble，再通过RRC信令指示UE使用其中的一个或多个可用于发送msg.2的DL BWP。
在本实施例中，网络设备还可以指示DL BWP index，例如，在指示用于发送msg.2的DL BWP的RRC IE中包含index信息。
在本实施例中，该随机接入方法适用于基于竞争的随机接入，可以由UE自主发起该随机接入，也可以由网络设备触发UE发起该随机接入。
在由网络设备触发的情况下，网络设备可以通过DCI或者RRC信令触发UE发起该基于竞争的随机接入。
在一个实施方式中，在网络设备触发UE发起该随机接入的情况下，网络设备还可以指示UE用于发送msg.2的DL BWP(例如DL BWP index)。由此，用户设备可以确定接收msg.2的DL BWP，进而在DL BWP上监听并接收msg.2。
在本实施方式中，如前所述，网络设备还可以指示第一DL BWP以及与第一DL BWP对应的至少一个preamble，在接收到的第一preamble属于指示的与所述第一DL BPW对应的至少一个preamble的情况下，确定用于发送msg.2的是第一DL BWP。
在本实施方式中，如前所述，网络设备还可以指示第一DL BWP以及与第一DL BWP对应的用于发送preamble的至少一个时频资源，在接收到第一preamble的第一时频资源属于指示的与第一DL BWP对应的用于发送preamble的至少一个时频资源的情况下，确定用于发送msg.2的是第一DL BWP。
在另一个实施方式中，在网络设备触发UE发起该随机接入的情况下，网络设备可以不指定UE发送msg.1可使用的preamble集合和/或时频资源集合，也可以指定UE发送msg.1可使用的preamble集合和/或时频资源集合，这里的时频资源是指PRACH资源或包含PRACH资源的UL BWP，但不限于此。在不指定的情况下，UE可以根据自己的策略选择发送msg.1的preamble和资源，在指定的情况下，UE可以从指定的preamble集合和/或资源集合中选择preamble和资源，具体将在实施例2中进行说明。
在网络设备指定UE发送msg.1可使用的preamble集合和/或资源集合的情况下，网络设备可以根据前述指示和与用于发送msg.2的DL BWP对应的用于发送msg.1的时频资源(PRACH资源或包含PRACH资源的UL BWP)和/或preamble，指定UE可使用的preamble集合和/或资源集合。
例如，网络设备可以指定UE使用一个或多个可用于发送msg.2的DL BWP对应的preamble和/或资源。再例如，网络设备可以告知UE可用于发送msg.2的一个或多个DL BWP，UE再根据该信息选择preamble和/或资源。
在本实施例中，网络设备可以在配置的时频资源上接收上述preamble，并在确定的DL BWP上发送msg.2，该msg.2可以包含调度该用户设备发送第三消息(msg.3)的调度信息。由此，用户设备可以在接收到该msg.2后根据该msg.2所包含的该调度信息向网络设备发送msg.3(步骤205)，如图2所示，在该msg.3中可以包含有该用户设备的标识(UE ID)，如C-RNTI等。网络设备可以在上述调度的位置接收该msg.3并根据该msg.3所包含的UE标识唯一确定发起该随机接入的该用户设备，并向该用户设备发送上述msg.4(步骤206)，保证该用户设备的正常接入。
在本实施例中，网络设备可以通过发送上述msg.2的DL BWP发送该msg.4；或者通过用户设备发起基于竞争的随机接入前的激活的DL BWP(active DL BWP)发送该msg.4；或者在用户设备被配置了默认的DL BWP(default DL BWP)的情况下，通过为用户设备配置的该默认的DL BWP(default DL BWP)发送该msg.4；或者在 用户设备发起基于竞争的随机接入前的激活的DL BWP没有超时的情况下，通过该激活的DL BWP发送该msg.4；或者在用户设备发起基于竞争的随机接入前的激活的DL BWP超时的情况下，通过为用户设备配置的默认的DL BWP发送该msg.4。
当用户设备被配置的DL BWP中的一个或多个被激活时，若用户设备被配置了默认的DL BWP，UE针对各激活的BWP启动一个计时器。当UE接收到控制信息时，UE重置发送该控制信息的DL BWP对应的计时器数值。计时器数值为0时，即超时，用户设备切换到所述默认的DL BWP。
在前面的实施例中，对根据接收到preamble和/或发送该preamble的时频资源确定发送msg.2的DL BWP做了说明。在前面的实施例中，在确定发送msg.2的DL BWP时，利用了网络设备指示的上述对应关系。
在其他实施例中，也可以不利用该对应关系，而根据用户设备发送的msg.1确定发送msg.2的DL BWP。
在该实施例中，网络设备接收用户设备发送的msg.1，所述msg.1中包含有指示发送msg.2的DL BWP的指示信息，该指示信息例如为DL BWP index或用户标识(C-RNTI)，所述网络设备根据所述指示信息确定发送msg.2的DL BWP，并在确定的DL BWP上发送msg.2。
在本实施例中，msg.1不限定于是用于随机接入，例如：msg.1可以包括指示信息及信号。该信号可以位于一个或多个符号，用于上行定时/信道估计/信道质量测量等。其可以是预定义的信号，例如序列信号，也可以称为Preamble，导频，参考信号等。
在该实施例中，msg.1中可以携带用于指示发送msg.2的DL BWP的指示信息，该指示信息可以为比特信息，则在网络设备配置或指示了可用于发送msg.2的DL BWP的情况下，用户设备可以通过msg.1携带的上述指示信息(例如DL BWP index，该用户设备的标识(UE ID)，如C-RNTI)告知网络设备发送msg.2的DL BWP。由此，网络设备在接收到msg.1后无需考虑发送preamble的时频资源或者preamble，也无需考虑上述对应关系，可以直接根据msg.1中携带的该指示信息来确定发送msg.2的DL BWP。当然，本实施例并不以此作为限制，作为一种选择，网络设备也可以同时考虑发送preamble的时频资源或者preamble，以及上述对应关系，综合考虑之后决定发送msg.2的DL BWP。
例如，网络设备可以指示与各个DL BWP对应的各个preamble，根据前述指示信息，接收到的所述msg.1所使用的preamble，以及指示的与各个DL BWP对应的各个preamble确定发送msg.2的DL BWP。
再例如，网络设备可以指示与各个DL BWP对应的用于发送msg.1的各个时频资源，根据前述指示信息，接收所述msg.1的时频资源，以及指示的与各个DL BWP对应的用于发送msg.1的各个时频资源确定发送msg.2的DL BWP。
再例如，网络设备可以指示与各个DL BWP对应的各个preamble以及与各个DL BWP对应的用于发送msg.1的各个时频资源，根据前述指示信息，接收到的所述msg.1所使用的preamble，接收所述msg.1的时频资源，指示的与各个DL BWP对应的各个preamble确定发送msg.2的DL BWP，以及指示的与各个DL BWP对应的用于发送msg.1的各个时频资源确定发送msg.2的DL BWP。
通过本实施例的方法，网络设备可以根据接收到的msg.1所使用的时频资源和/或preamble和/或该msg.1所携带的指示信息确定发送msg.2的DL BWP以发送该msg.2。由此，保证了UE的正常接入。
实施例2
本实施例提供了一种随机接入方法，该方法应用于用户设备，其是对应实施例1的方法的终端侧的处理，其中与实施例1相同的内容不再重复说明。图10是该方法的示意图，请参照图10，该方法包括：
步骤1001：用户设备确定接收msg.2的DL BWP；
步骤1002：所述用户设备从与所述DL BWP对应的用于发送preamble的至少一个时频资源中选择第一时频资源，并从与所述DL BWP对应的至少一个preamble中选择第一preamble，在选择的第一时频资源上发送第一preamble；
步骤1003：所述用户设备在所述DL BWP上监听并接收所述msg.2。
在本实施例中，如实施例1所述，上述时频资源可以是PRACH资源，上述第一preamble为msg.1(随机接入请求)所使用的preamble，上述msg.2为随机接入响应，UE可以自主发起该随机接入，也可以根据网络设备的触发来发起该随机接入。
在步骤1001的一个实施方式中，如实施例1所述，网络设备可以指示第一DL BWP以及与第一DL BWP对应的用于发送preamble的至少一个时频资源，和/或， 第二DL BWP以及与第二DL BWP对应的用于发送preamble的至少一个时频资源。用户设备可以接收该指示，并根据该指示确定接收msg.2的DL BWP。
在步骤1001的另一个实施方式中，如实施例1所述，网络设备可以指示第一DL BWP以及与第一DL BWP对应的至少一个preamble，和/或，第二DL BWP以及与第二DL BWP对应的至少一个preamble。用户设备可以接收该指示，并根据该指示确定接收msg.2的DL BWP。
在本实施例中，上述两个实施方式可以结合。
在步骤1001的另一个实施方式中，如实施例1所述，网络设备在触发UE进行基于竞争的随机接入时，可以指示UE发送msg.2的DL BWP，由此，UE可以根据该指示确定接收msg.2的DL BWP。
关于具体的指示方式，以及可用于发送msg.2的DL BWP与preamble和/或与可用于发送preamble的时频资源之间的对应关系，已经在实施例1中做了详细说明，其内容被合并于此，此处不再赘述。
在步骤1002中，在网络设备没有指定发送preamble所使用的对应于一个DL BWP的preamble集合和/或时频资源集合的情况下，也即，UE自主发起该随机接入或者网络设备触发UE发起该随机接入但没有进行上述指定，则在UE在同一时刻只能激活使用一个UL BWP的情况下，UE可以采用如下方式发送该第一preamble。
例如，UE在当前激活的UL BWP包含用于发送preamble的时频资源的情况下，从当前的激活的UL BWP中选择用于发送第一preamble的时频资源发送该第一preamble。
再例如，UE可以切换到另一个包含PRACH资源的UL BWP并采用其中的PRACH资源发送该第一preamble。
例如，UE可以切换到分配的其他未激活的包含用于发送preamble的PRACH资源的UL BWP，从中选择用于发送第一preamble的PRACH资源发送该第一preamble。
再例如，UE可以切换到分配的所有UL BWP以外的包含用于发送preamble的PRACH资源的UL BWP，从中选择用于发送第一preamble的PRACH资源发送该第一preamble。
此外，在UE在同一时刻能激活使用两个或两个以上的UL BWP的情况下，UE可以采用如下方式发送该第一preamble。
例如，UE可以在激活的UL BWP未达到最大数的情况下，激活分配的其他未激活的包含用于发送preamble的PRACH资源的UL BWP，从中选择用于发送第一preamble的PRACH资源发送该第一preamble。
再例如，UE可以激活或切换到另一个包含PRACH资源的UL BWP并采用其中的PRACH资源发送该第一preamble。
例如，UE可以在激活的UL BWP未达到最大数的情况下，激活分配的所有UL BWP以外的包含用于发送preamble的PRACH资源的UL BWP，从中选择用于发送第一preamble的PRACH资源发送该第一preamble。
再例如，UE可以切换至少一个激活的UL BWP到分配的其他未激活的包含用于发送preamble的PRACH资源的UL BWP，从中选择用于发送第一preamble的PRACH资源发送该第一preamble。
再例如，UE可以切换至少一个激活的UL BWP到分配的所有UL BWP以外的包含用于发送preamble的PRACH资源的UL BWP，从中选择用于发送第一preamble的PRACH资源发送该第一preamble。
在步骤1002中，在gNB指定了发送preamble所使用的对应于一个DL BWP的preamble集合和/或时频资源集合的情况下，也即，网络设备触发UE发起该随机接入并且进行了上述指定，则UE可以从网络设备指定的发送preamble所使用的时频资源集合和/或preamble集合中选择用于发送第一preamble的时频资源发送所述第一preamble。此外，通过该指定还可以隐式地向UE指示网络设备发送msg.2的DL BWP，由此，UE可以根据该指示确定接收msg.2的DL BWP。
在步骤1003的另一个实施方式中，如实施例1所述，网络设备还可以指示与第一DL BWP对应的至少一个preamble和/或与第二DL BWP对应的至少一个preamble，则UE可以接收该指示，并根据该指示以及其发送该第一preamble确定网络设备发送msg.2的DL BWP。
例如，在用户设备发送的第一preamble对应于第一DL BWP的情况下，也即，上述第一preamble属于与第一DL BWP对应的至少一个preamble，则用户设备确定网络设备发送msg.2的DL BWP为第一DL BWP。再例如，在用户设备发送的第一preamble对应于第二DL BWP的情况下，也即，上述第一preamble属于与第二DL BWP对应的至少一个preamble，则用户设备确定网络设备发送msg.2的DL BWP为 第二DL BWP。
关于具体的指示方式，以及可用于发送msg.2的DL BWP与preamble之间的对应关系，已经在实施例1中做了详细说明，其内容被合并于此，此处不再赘述。
在步骤1003中，在UE在同一时刻只能接收使用一个DL BWP的情况下，该UE可以采用以下方式监听并接收msg.2。
例如，如果确定的上述DL BWP中用于发送msg.2的CORESET配置与当前激活的DL BWP中用于发送msg.2的CORESET配置相同，则UE可以在当前激活的DL BWP上监听并接收msg.2。
再例如，UE也可以切换到确定的上述DL BWP，在确定的上述DL BWP监听并接收msg.2。
在步骤1003中，在UE在同一时刻能接收使用两个或两个以上的DL BWP的情况下，该UE可以采用以下方式监听并接收msg.2。
例如，如果确定的上述DL BWP中用于发送msg.2的CORESET配置与当前激活的DL BWP中用于发送msg.2的CORESET配置相同，则UE可以在当前激活的DL BWP上监听并接收msg.2。
再例如，UE可以激活或切换到另一个DL BWP监听并接收msg.2。
例如，如果激活的DL BWP未达到最大数，则UE可以激活确定的上述DL BWP，在确定的上述DL BWP监听并接收所述msg.2。
再例如，UE可以切换其中一个激活的DL BWP到确定的上述DL BWP，在确定的上述DL BWP监听并接收所述msg.2。
在以上的说明中，确定的上述DL BWP即为UE发送的msg.1所对应的DL BWP，也即，发送该第一preamble的时频资源和/或第一preamble所对应的发送msg.2的DL BWP。
在本实施例中，当UE接收了msg.2之后，即可根据msg.2中包含的发送msg.3的调度信息发送msg.3，在该msg.3中可以包含UE的标识，也即UE ID。如前所述，网络设备可以在调度的位置接收该msg.3，而后根据该msg.3中所包含的UE ID唯一确定UE，并向UE发送msg.4。具体的发送方式如实施例1所述，此处省略说明。
在本实施例中，UE可以接收到该msg.4，进而完成了随机接入的整个过程。
在本实施例中，对应网络设备侧的其他实施例，msg.1还可以通过携带指示信息 来指示发送msg.2的DL BWP，则在本实施例中，UE可以根据其发送的msg.1所携带的该指示信息确定网络设备发送msg.2的DL BWP，以在确定的该DL BWP监听并接收msg.2。
在该实施例中，用户设备可以向网络设备发送msg.1，所述msg.1中包含有指示所述网络设备发送msg.2的DL BWP的指示信息，所述指示信息为比特信息，并根据所述指示信息确定接收msg.2的DL BWP，在确定的DL BWP上接收网络设备发送的msg.2。
在该实施例中，除了该指示信息，用户设备还可以进一步根据发送所述msg.1的时频资源和/或所述msg.1使用的preamble确定接收msg.2的DL BWP。
例如，用户设备可以根据所述指示信息、所述网络设备指示的与各个DL BWP对应的各个preamble、所述msg.1所使用的preamble，确定接收msg.2的DL BWP。
再例如，用户设备根据所述指示信息，发送所述msg.1的时频资源，以及所述网络设备指示的与各个DL BWP对应的用于发送msg.1的各个时频资源确定接收msg.2的DL BWP。
通过本实施例的方法，用户设备可以向网络设备发送msg.1，并根据发送的该msg.1(例如发送msg.1的时频资源和/或preamble和/或msg.1所携带的指示信息)确定网络设备发送msg.2的DL BWP，在该DL BWP监听并接收msg.2，进而完成随机接入。由此，保证了UE的正常接入。
实施例3
本实施例提供了一种随机接入装置，该装置可以配置于网络设备，例如gNB(NR中的基站)等。由于该装置解决问题的原理与实施例1的方法类似，因此其具体的实施可以参照实施例1的方法的实施，内容相同之处不再重复说明。
图11是该装置的组成示意图，请参照图11，该随机接入装置1100包括：接收单元1101、确定单元1102、以及发送单元1103。接收单元1101在第一时频资源接收第一用户设备发送的第一前导码(preamble)；确定单元1102根据所述第一preamble确定发送第二消息(msg.2A)的载波带宽(DL BWP)；发送单元1103在所述DL BWP上发送所述msg.2A。
在本实施例中，确定单元1102可以根据接收的该第一preamble确定用于发送 msg.2的DL BWP。由此保证了UE的正常接入。
在本实施例的一个实施方式中，如图11所示，该随机接入装置1100还包括第一指示单元1104，其指示第一DL BWP以及与第一DL BWP对应的至少一个preamble，所述第一preamble属于所述第一指示单元1104指示的与第一DL BWP对应的所述至少一个preamble。由此，确定单元1102可以根据所述第一指示单元1104的指示以及所述第一preamble确定所述第一DL BWP。
在本实施方式中，第一指示单元1104还可以指示第二DL BWP以及与第二DL BWP对应的至少一个preamble；接收单元1101还可以接收第二用户设备发送的第二preamble，第二preamble属于第一指示单元1104指示的与第二DL BWP对应的至少一个preamble；确定单元1102还可以根据该第一指示单元1104的指示以及该第二preamble确定用于发送第二消息(msg.2B)的第二DL BWP；发送单元1103还可以在该第二DL BWP上发送所述msg.2B。
在本实施例中，第一指示单元1104可以通过广播信息，或者，系统信息和/或RRC信令进行上述指示。
在本实施例的另一个实施方式中，如图11所示，该随机接入装置1100还包括第二指示单元1105，其指示第一DL BWP以及与第一DL BWP对应的用于发送preamble的至少一个时频资源，所述第一时频资源属于所述第二指示单元1105指示的与第一DL BWP对应的所述至少一个时频资源。由此，确定单元1102可以根据第二指示单元1105的指示以及所述第一时频资源确定所述第一DL BWP。
在本实施方式中，第二指示单元1105还可以指示第二DL BWP以及与第二DL BWP对应的用于发送preamble的至少一个时频资源；接收单元1101还可以在第二时频资源接收第二用户设备发送的第二preamble，所述第二时频资源属于所述第二指示单元1105指示的与第二DL BWP对应的用于发送preamble的至少一个时频资源；确定单元1102还可以根据所述第二指示单元1105的指示以及所述第二时频资源确定用于发送第二消息(msg.2B)的是第二DL BWP；发送单元1103还可以在所述第二DL BPW上发送所述msg.2B。
在本实施方式中，第二指示单元1105可以通过广播信息，或者，系统信息和/或RRC信令进行上述指示。
在本实施例中，如图11所示，该随机接入装置1100还可以包括：触发单元1106， 其可以触发其覆盖范围内的用户设备发起基于竞争的随机接入，可选的，指示各用户设备发送msg.2的DL BWP，可选的，指定或不指定该用户设备发送msg.1所使用的对应于一个DL BWP的preamble集合和/或资源集合。
在本实施例中，如图11所示，该随机接入装置1100还可以包括：第三指示单元1107，其指示第一DL BWP以及与第一DL BWP对应的至少一个preamble，所述第一preamble属于所述第三单元指示的与所述第一DL BPW对应的至少一个preamble；所述确定单元1102根据所述第三指示单元1107的指示以及所述第一preamble确定用于发送msg.2A的是第一DL BWP。
在本实施例中，如图11所示，该随机接入装置1100还可以包括：第四指示单元1108，其指示第一DL BWP以及与第一DL BWP对应的用于发送preamble的至少一个时频资源，所述第一时频资源属于所述第四指示单元1108指示的与第一DL BWP对应的用于发送preamble的至少一个时频资源；所述确定单元1102根据所述第四指示单元1108的指示以及所述第一时频资源确定用于发送msg.2A的是第一DL BWP。
在本实施例中，接收单元1101还可以接收第一用户设备发送的第三消息(msg.3A)，该msg.3A中可以包含有该第一用户设备的标识，由此，发送单元1103可以根据该第一用户设备的标识向该第一用户设备发送第四消息(msg.4A)。
在本实施例中，发送单元1103可以通过发送msg.2A的DL BWP发送该msg.4A；或者通过第一用户设备发起基于竞争的随机接入前的激活的DL BWP发送该msg.4A；或者通过为第一用户设备配置的默认的DL BWP发送该msg.4A；或者在第一用户设备发起基于竞争的随机接入前的激活的DL BWP没有超时的情况下通过该激活的DL BWP发送该msg.4A；或者在第一用户设备发起基于竞争的随机接入前的激活的DL BWP超时的情况下通过为第一用户设备配置的默认的DL BWP发送该msg.4A。
在本实施例的其他实施方式中，接收单元1101接收的msg.1中包含有指示发送msg.2的DL BWP的指示信息，确定单元1102可以根据该指示信息确定发送msg.2的DL BWP。该实施方式可以和前述实施方式结合使用。
通过本实施例的装置，网络设备可以根据接收到的msg.1所使用的时频资源和/或preamble和/或该msg.1所携带的指示信息确定发送msg.2的DL BWP以发送该msg.2。由此，保证了UE的正常接入。
实施例4
本实施例提供了一种随机接入装置，所述装置可以配置于用户设备。由于该装置解决问题的原理与实施例2的方法类似，因此其具体的实施可以参照实施例2的方法的实施，内容相同之处不再重复说明。
图12是该装置的组成示意图，请参照图2，该随机接入装置1200包括：确定单元1201、发送单元1202和接收单元1203。确定单元1201确定接收msg.2的DL BWP；发送单元1202从与所述DL BWP对应的用于发送preamble的至少一个时频资源中选择第一时频资源，并从与所述DL BWP对应的至少一个preamble中选择第一preamble，在选择的第一时频资源上发送第一preamble；接收单元1203在该DL BWP上监听并接收上述msg.2。
在本实施例的一个实施方式中，接收单元1203还可以接收网络设备指示的第一DL BWP以及与第一DL BWP对应的用于发送preamble的至少一个时频资源，和/或，第二DL BWP以及与第二DL BWP对应的用于发送preamble的至少一个时频资源，确定单元1201可以根据发送所述第一preamble的所述第一时频资源，以及所述网络设备指示的第一DL BWP以及与第一DL BWP对应的用于发送preamble的至少一个时频资源，和/或，第二DL BWP以及与第二DL BWP对应的用于发送preamble的至少一个时频资源，确定接收msg.2的DL BWP。
在本实施例的另一个实施方式中，接收单元1203还可以接收网络设备指示的第一DL BWP以及与第一DL BWP对应的至少一个preamble，和/或，第二DL BWP以及与第二DL BWP对应的至少一个preamble，确定单元1201可以根据所述第一preamble，以及所述网络设备指示的第一DL BWP以及与第一DL BWP对应的至少一个preamble，和/或，第二DL BWP以及与第二DL BWP对应的至少一个preamble，确定接收msg.2的DL BWP。
在本实施例的再一个实施方式中，确定单元1201可以根据网络设备在触发所述用户设备进行基于竞争的随机接入时指示的用于发送msg.2的DL BWP确定接收msg.2的DL BWP。
在本实施例的一个实施方式中，在网络设备未指定发送msg.1所使用的对应于一个DL BWP的preamble集合和/或资源集合的情况下，发送单元1202可以通过以下 方式发送msg.1。
在当前激活的UL BWP包含用于发送msg.1的PRACH资源的情况下，从当前的激活的UL BWP中选择用于发送msg.1的PRACH资源和preamble发送所述msg.1，或者，
切换到分配的其他未激活的包含用于发送msg.1的PRACH资源的UL BWP，从中选择用于发送msg.1的PRACH资源和preamble发送所述msg.1；或者，
切换到分配的所有UL BWP以外的包含用于发送msg.1的PRACH资源的UL BWP，从中选择用于发送msg.1的PRACH资源和preamble发送所述msg.1；或者，
在激活的UL BWP未达到最大数的情况下，激活分配的其他未激活的包含用于发送msg.1的PRACH资源的UL BWP，从中选择用于发送msg.1的PRACH资源和preamble发送所述msg.1；或者，
在激活的UL BWP未达到最大数的情况下，激活分配的所有UL BWP以外的包含用于发送msg.1的PRACH资源的UL BWP，从中选择用于发送msg.1的PRACH资源和preamble发送所述msg.1；或者，
切换至少一个激活的UL BWP到分配的其他未激活的包含用于发送msg.1的PRACH资源的UL BWP，从中选择用于发送msg.1的PRACH资源和preamble发送所述msg.1；或者，
切换至少一个激活的UL BWP到分配的所有UL BWP以外的包含用于发送msg.1的PRACH资源的UL BWP，从中选择用于发送msg.1的PRACH资源和preamble发送所述msg.1。
在本实施例的另一个实施方式中，在网络设备指定了发送msg.1所使用的对应于一个DL BWP的preamble集合和/或资源集合的情况下，发送单元1202可以从网络设备指定的发送msg.1所使用的preamble集合和/或资源集合中选择用于发送msg.1的时频资源和preamble发送所述msg.1。
在本实施例的其他实施方式中，发送单元1202发送的msg.1中携带有指示发送msg.2的DL BWP的指示信息。该实施方式可以和前述实施方式结合使用。
在本实施例中，如果确定的上述DL BWP中用于发送msg.2的CORESET配置与当前激活的DL BWP中用于发送msg.2的CORESET配置相同，则接收单元1203可以在当前激活的DL BWP监听并接收所述msg.2。
在本实施例中，接收单元1203也可以切换到确定的上述DL BWP，在确定的上述DL BWP监听并接收所述msg.2；
在本实施例中，如果激活的DL BWP未达到最大数，则接收单元1203也可以激活确定的上述DL BWP，并在确定的上述DL BWP监听并接收所述msg.2。
在本实施例中，接收单元1203还可以切换其中一个激活的DL BWP到确定的上述DL BWP，在确定的上述DL BWP监听并接收所述msg.2。
通过本实施例的装置，用户设备可以向网络设备发送msg.1，并根据发送的该msg.1(例如发送msg.1的时频资源和/或preamble和/或msg.1所携带的指示信息)确定网络设备发送msg.2的DL BWP，在该DL BWP监听并接收msg.2，进而完成随机接入。由此，保证了UE的正常接入。
实施例5
本发明实施例还提供了一种网络设备，例如gNB(NR中的基站)等，其中，该网络设备包括实施例3所述的随机接入装置。
图13是本发明实施例的网络设备的一个实施方式的构成示意图。如图13所示，网络设备1300可以包括：中央处理器(CPU)1301和存储器1302；存储器1302耦合到中央处理器1301。其中该存储器1302可存储各种数据；此外还存储信息处理的程序，并且在中央处理器1301的控制下执行该程序，以接收用户设备发送的各种信息、并且向用户设备发送各种信息。
在一个实施方式中，实施例3所述的随机接入装置的功能可以被集成到中央处理器1301中，由中央处理器1301实现实施例3所述的随机接入装置的功能，其中关于随机接入装置的功能被合并于此，在此不再赘述。
在另一个实施方式中，实施例3的随机接入装置可以与中央处理器1301分开配置，例如可以将该随机接入装置配置为与中央处理器1301连接的芯片，通过中央处理器1301的控制来实现该随机接入装置的功能。
此外，如图13所示，网络设备1300还可以包括：收发机1303和天线1304等；其中，上述部件的功能与现有技术类似，此处不再赘述。值得注意的是，网络设备1300也并不是必须要包括图13中所示的所有部件；此外，网络设备1300还可以包括图8中没有示出的部件，可以参考现有技术。
通过本实施例的网络设备，可以根据接收到的msg.1所使用的时频资源和/或preamble和/或该msg.1所携带的指示信息确定发送msg.2的DL BWP以发送该msg.2。由此，保证了UE的正常接入。
实施例6
本发明实施例还提供了一种用户设备，其中，该用户设备包括实施例4所述的随机接入装置。
图14是本发明实施例的用户设备的组成示意图。如图14所示，该用户设备1400可以包括中央处理器1401和存储器1402；存储器1402耦合到中央处理器1401。值得注意的是，该图是示例性的；还可以使用其它类型的结构，来补充或代替该结构，以实现电信功能或其它功能。
在一个实施方式中，实施例4的随机接入装置的功能可以被集成到中央处理器1401中，由中央处理器1401实现实施例4所述的随机接入装置的功能，其中关于随机接入装置的功能被合并于此，在此不再赘述。
在另一个实施方式中，实施例4的随机接入装置可以与中央处理器1401分开配置，例如可以将该随机接入装置配置为与中央处理器1401连接的芯片，通过中央处理器1401的控制来实现该随机接入装置的功能。
如图14所示，该用户设备1400还可以包括：通信模块1403、输入单元1404、音频处理单元1405、显示器1406、电源1407。值得注意的是，用户设备1400也并不是必须要包括图14中所示的所有部件；此外，用户设备1400还可以包括图14中没有示出的部件，可以参考现有技术。
如图14所示，中央处理器1401有时也称为控制器或操作控件，可以包括微处理器或其它处理器装置和/或逻辑装置，该中央处理器1401接收输入并控制用户设备1400的各个部件的操作。
其中，存储器1402，例如可以是缓存器、闪存、硬驱、可移动介质、易失性存储器、非易失性存储器或其它合适装置中的一种或更多种。可储存上述与配置有关的信息，此外还可存储执行有关信息的程序。并且中央处理器1401可执行该存储器1402存储的该程序，以实现信息存储或处理等。其它部件的功能与现有类似，此处不再赘述。用户设备1400的各部件可以通过专用硬件、固件、软件或其结合来实现，而不 偏离本发明的范围。
通过本实施例的用户设备，可以向网络设备发送msg.1，并根据发送的该msg.1(例如发送msg.1的时频资源和/或preamble和/或msg.1所携带的指示信息)确定网络设备发送msg.2的DL BWP，在该DL BWP监听并接收msg.2，进而完成随机接入。由此，保证了UE的正常接入。
实施例7
本发明实施例还提供一种通信系统，该通信系统包括网络设备和用户设备，网络设备例如为实施例5所述的网络设备1300，用户设备例如为实施例6所述的用户设备1400。
在本实施例中，该网络设备例如可以是NR中的gNB，其除了包含实施例3所述的随机接入装置的功能以外，还包括网络设备的常规组成和功能，如实施例5所述，在此不再赘述。
在本实施例中，该用户设备例如是gNB服务的UE，其除了包含实施例4所述的随机接入装置的功能以外，还包括用户设备的常规组成和功能，如实施例6所述，在此不再赘述。
通过本实施例的通信系统，保证了UE的正常接入。
本发明实施例还提供一种计算机可读程序，其中当在网络设备中执行所述程序时，所述程序使得计算机在所述网络设备中执行实施例1所述的方法。
本发明实施例还提供一种存储有计算机可读程序的存储介质，其中所述计算机可读程序使得计算机在网络设备中执行实施例1所述的方法。
本发明实施例还提供一种计算机可读程序，其中当在用户设备中执行所述程序时，所述程序使得计算机在所述用户设备中执行实施例2所述的方法。
本发明实施例还提供一种存储有计算机可读程序的存储介质，其中所述计算机可读程序使得计算机在用户设备中执行实施例2所述的方法。
本发明以上的装置和方法可以由硬件实现，也可以由硬件结合软件实现。本发明涉及这样的计算机可读程序，当该程序被逻辑部件所执行时，能够使该逻辑部件实现上文所述的装置或构成部件，或使该逻辑部件实现上文所述的各种方法或步骤。逻辑部件例如现场可编程逻辑部件、微处理器、计算机中使用的处理器等。本发明还涉及 用于存储以上程序的存储介质，如硬盘、磁盘、光盘、DVD、flash存储器等。
结合本发明实施例描述的方法/装置可直接体现为硬件、由处理器执行的软件模块或二者组合。例如，图11中所示的功能框图中的一个或多个和/或功能框图的一个或多个组合(例如，接收单元、确定单元、发送单元等)，既可以对应于计算机程序流程的各个软件模块，亦可以对应于各个硬件模块。这些软件模块，可以分别对应于图3所示的各个步骤。这些硬件模块例如可利用现场可编程门阵列(FPGA)将这些软件模块固化而实现。
软件模块可以位于RAM存储器、闪存、ROM存储器、EPROM存储器、EEPROM存储器、寄存器、硬盘、移动磁盘、CD-ROM或者本领域已知的任何其它形式的存储介质。可以将一种存储介质耦接至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息；或者该存储介质可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。该软件模块可以存储在移动终端的存储器中，也可以存储在可插入移动终端的存储卡中。例如，若设备(如移动终端)采用的是较大容量的MEGA-SIM卡或者大容量的闪存装置，则该软件模块可存储在该MEGA-SIM卡或者大容量的闪存装置中。
针对附图中描述的功能方框中的一个或多个和/或功能方框的一个或多个组合，可以实现为用于执行本发明所描述功能的通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)或者其它可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件或者其任意适当组合。针对附图描述的功能方框中的一个或多个和/或功能方框的一个或多个组合，还可以实现为计算设备的组合，例如，DSP和微处理器的组合、多个微处理器、与DSP通信结合的一个或多个微处理器或者任何其它这种配置。
以上结合具体的实施方式对本发明进行了描述，但本领域技术人员应该清楚，这些描述都是示例性的，并不是对本发明保护范围的限制。本领域技术人员可以根据本发明的精神和原理对本发明做出各种变型和修改，这些变型和修改也在本发明的范围内。
根据本发明实施例公开的各种实施方式，还公开了如下附记：
附记1，一种随机接入方法，所述方法应用于网络设备，其中，所述方法包括：
网络设备接收用户设备发送的第一消息(msg.1)，所述msg.1中包含有指示发送 第二消息(msg.2)的载波带宽(DL BWP)的指示信息，所述指示信息为比特信息；
所述网络设备根据所述指示信息确定发送msg.2的DL BWP；
所述网络设备在确定的DL BWP上发送msg.2。
附记2，根据附记1所述的方法，其中，所述网络设备进一步根据所述指示信息，以及发送所述msg.1的时频资源和/或所述msg.1使用的preamble确定发送msg.2的DL BWP。
附记3，根据附记2所述的方法，其中，所述方法还包括：
所述网络设备指示与各个DL BWP对应的各个preamble；
所述网络设备根据所述指示信息，接收到的所述msg.1所使用的preamble，以及指示的与各个DL BWP对应的各个preamble确定发送msg.2的DL BWP。
附记4，根据附记2或3所述的方法，其中，所述方法还包括：
所述网络设备指示与各个DL BWP对应的用于发送msg.1的各个时频资源；
所述网络设备根据所述指示信息，接收所述msg.1的时频资源，以及指示的与各个DL BWP对应的用于发送msg.1的各个时频资源确定发送msg.2的DL BWP。
附记5，一种随机接入方法，所述方法应用于用户设备，其中，所述方法包括：
用户设备向网络设备发送msg.1，所述msg.1中包含有指示所述网络设备发送第二消息(msg.2)的载波带宽(DL BWP)的指示信息，所述指示信息为比特信息；
所述用户设备根据所述指示信息确定接收msg.2的DL BWP；
所述用户设备在确定的DL BWP上接收网络设备发送的msg.2。
附记6，根据附记5所述的方法，其中，所述用户设备进一步根据所述指示信息，以及发送所述msg.1的时频资源和/或所述msg.1使用的preamble确定接收msg.2的DL BWP。
附记7，根据附记6所述的方法，其中，
所述用户设备根据所述指示信息、所述网络设备指示的与各个DL BWP对应的各个preamble、所述msg.1所使用的preamble，确定接收msg.2的DL BWP。
附记8，根据附记6或7所述的方法，其中，
所述用户设备根据所述指示信息，发送所述msg.1的时频资源，以及所述网络设备指示的与各个DL BWP对应的用于发送msg.1的各个时频资源确定接收msg.2的DL BWP。

Claims (20)

  1. 一种随机接入装置，配置于网络设备，其中，所述装置包括：
    接收单元，其在第一时频资源接收第一用户设备发送的第一前导码(preamble)；
    确定单元，其根据所述第一preamble确定发送第二消息(msg.2A)的第一载波带宽(DL BWP)；
    发送单元，其在所述第一DL BWP上发送所述msg.2A。
  2. 根据权利要求1所述的装置，其中，所述装置还包括：
    第一指示单元，其指示第一DL BWP以及与第一DL BWP对应的至少一个preamble，所述第一preamble属于所述第一指示单元指示的与第一DL BWP对应的所述至少一个preamble；
    所述确定单元根据所述第一指示单元的指示以及所述第一preamble确定所述第一DL BWP。
  3. 根据权利要求2所述的装置，其中，
    所述第一指示单元还用于指示第二DL BWP以及与第二DL BWP对应的至少一个preamble；
    所述接收单元还用于接收第二用户设备发送的第二preamble，所述第二preamble属于所述第一指示单元指示的与第二DL BWP对应的至少一个preamble；
    所述确定单元还用于根据所述第一指示单元的指示以及所述第二preamble确定用于发送第二消息(msg.2B)的第二DL BWP；
    所述发送单元还用于在所述第二DL BPW上发送所述msg.2B。
  4. 根据权利要求2或3所述的装置，其中，所述第一指示单元通过广播信息，或者，系统信息和/或RRC信令进行上述指示。
  5. 根据权利要求1或2所述的装置，其中，所述装置还包括：
    第二指示单元，其指示第一DL BWP以及与第一DL BWP对应的用于发送preamble的至少一个时频资源，所述第一时频资源属于所述第二指示单元指示的与第一DL BWP对应的所述至少一个时频资源；
    所述确定单元根据所述第二指示单元的指示以及所述第一时频资源确定所述第一DL BWP。
  6. 根据权利要求5所述的装置，其中，
    所述第二指示单元还用于指示第二DL BWP以及与第二DL BWP对应的用于发送preamble的至少一个时频资源；
    所述接收单元还用于在第二时频资源接收第二用户设备发送的第二preamble，所述第二时频资源属于所述第二指示单元指示的与第二DL BWP对应的用于发送preamble的至少一个时频资源；
    所述确定单元还用于根据所述第二指示单元的指示以及所述第二时频资源确定用于发送第二消息(msg.2B)的是第二DL BWP；
    所述发送单元还用于在所述第二DL BPW上发送所述msg.2B。
  7. 根据权利要求5或6所述的装置，其中，所述第二指示单元通过广播信息，或者，系统信息和/或RRC信令进行上述指示。
  8. 根据权利要求3或6所述的装置，其中，所述第一用户设备和所述第二用户设备不同或相同。
  9. 根据权利要求1所述的装置，其中，所述装置还包括：
    触发单元，其触发覆盖范围内的用户设备发起基于竞争的随机接入，指示所述用户设备用于发送msg.2的DL BWP。
  10. 根据权利要求1所述的装置，其中，
    所述接收单元还接收所述第一用户设备发送的第三消息(msg.3 A)，所述msg.3 A中包含有所述第一用户设备的标识；
    所述发送单元还根据所述第一用户设备的标识向所述第一用户设备发送第四消息(msg.4 A)。
  11. 根据权利要求10所述的装置，其中，
    所述发送单元通过发送所述msg.2A的DL BWP发送所述msg.4A；或者
    所述发送单元通过所述第一用户设备发起基于竞争的随机接入前的激活的DL BWP发送所述msg.4A；或者
    所述发送单元通过为所述第一用户设备配置的默认的DL BWP发送所述msg.4A；或者
    所述发送单元在所述第一用户设备发起基于竞争的随机接入前的激活的DL BWP没有超时的情况下通过所述激活的DL BWP发送所述msg.4A；或者
    所述发送单元在所述第一用户设备发起基于竞争的随机接入前的激活的DL BWP超时的情况下通过为所述第一用户设备配置的默认的DL BWP发送所述msg.4A。
  12. 一种随机接入装置，配置于用户设备，其中，所述装置包括：
    确定单元，其确定接收msg.2的DL BWP；
    发送单元，其从与所述DL BWP对应的用于发送preamble的至少一个时频资源中选择第一时频资源，并从与所述DL BWP对应的至少一个preamble中选择第一preamble，在选择的第一时频资源上发送第一preamble；
    接收单元，其在所述DL BWP上监听并接收所述msg.2。
  13. 根据权利要求12所述的装置，其中，所述接收单元还接收网络设备指示的第一DL BWP以及与第一DL BWP对应的用于发送preamble的至少一个时频资源，和/或，第二DL BWP以及与第二DL BWP对应的用于发送preamble的至少一个时频资源。
  14. 根据权利要求13所述的装置，其中，所述确定单元根据所述网络设备指示的第一DL BWP以及与第一DL BWP对应的用于发送preamble的至少一个时频资源，和/或，第二DL BWP以及与第二DL BWP对应的用于发送preamble的至少一个时频资源，确定接收msg.2的DL BWP。
  15. 根据权利要求12-14任一项所述的装置，其中，所述接收单元还接收网络设备指示的第一DL BWP以及与第一DL BWP对应的至少一个preamble，和/或，第二DL BWP以及与第二DL BWP对应的至少一个preamble。
  16. 根据权利要求15所述的装置，其中，所述确定单元根据所述网络设备指示的第一DL BWP以及与第一DL BWP对应的至少一个preamble，和/或，第二DL BWP以及与第二DL BWP对应的至少一个preamble，确定接收msg.2的DL BWP。
  17. 根据权利要求12所述的装置，其中，所述接收单元还接收网络设备指示的用于发送msg.2的DL BWP。
  18. 根据权利要求17所述的装置，其中，所述确定单元根据所述网络设备在触发所述用户设备进行基于竞争的随机接入时指示的用于发送msg.2的DL BWP确定接收msg.2的DL BWP。
  19. 根据权利要求12所述的装置，其中，
    如果确定的所述DL BWP中用于发送msg.2的CORESET配置与当前激活的DL BWP中用于发送msg.2的CORESET配置相同，则所述接收单元在当前激活的DL BWP监听并接收所述msg.2；或者
    所述接收单元切换到确定的所述DL BWP，在确定的所述DL BWP监听并接收所述msg.2；
    如果激活的DL BWP未达到最大数，则所述接收单元激活确定的所述DL BWP，在确定的所述DL BWP监听并接收所述msg.2；或者
    所述接收单元切换其中一个激活的DL BWP到确定的所述DL BWP，在确定的所述DL BWP监听并接收所述msg.2。
  20. 一种通信系统，其中，所述通信系统包括网络设备和用户设备，所述网络设备包括权利要求1-11任一项所述的装置，所述用户设备包括权利要求12-19任一项所述的装置。
PCT/CN2017/111757 2017-11-17 2017-11-17 随机接入方法、装置以及通信系统 Ceased WO2019095337A1 (zh)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CN201780095493.3A CN111165060B (zh) 2017-11-17 2017-11-17 随机接入方法、装置以及通信系统
JP2020524744A JP7024867B2 (ja) 2017-11-17 2017-11-17 ランダムアクセス方法、装置及び通信システム
PCT/CN2017/111757 WO2019095337A1 (zh) 2017-11-17 2017-11-17 随机接入方法、装置以及通信系统
US16/365,158 US11064527B2 (en) 2017-11-17 2019-03-26 Random access method and apparatus and communication system
US17/326,516 US12160893B2 (en) 2017-11-17 2021-05-21 Random access method and apparatus and communication system
JP2022019849A JP7310951B2 (ja) 2017-11-17 2022-02-10 ランダムアクセス方法、装置及び通信システム

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2017/111757 WO2019095337A1 (zh) 2017-11-17 2017-11-17 随机接入方法、装置以及通信系统

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US16/365,158 Continuation US11064527B2 (en) 2017-11-17 2019-03-26 Random access method and apparatus and communication system

Publications (1)

Publication Number Publication Date
WO2019095337A1 true WO2019095337A1 (zh) 2019-05-23

Family

ID=66539333

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/111757 Ceased WO2019095337A1 (zh) 2017-11-17 2017-11-17 随机接入方法、装置以及通信系统

Country Status (4)

Country Link
US (2) US11064527B2 (zh)
JP (1) JP7024867B2 (zh)
CN (1) CN111165060B (zh)
WO (1) WO2019095337A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021159626A1 (zh) * 2020-02-14 2021-08-19 富士通株式会社 上行传输方法以及装置

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI735823B (zh) * 2017-11-24 2021-08-11 香港商鴻穎創新有限公司 在部分頻寬切換操作中處理隨機存取程序的方法和相關裝置
CN110022607B (zh) * 2018-01-08 2021-02-05 电信科学技术研究院 一种波束失败恢复方法、装置及设备
AU2018407192A1 (en) * 2018-02-08 2020-10-01 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Resource configuration method and device, and computer storage medium
WO2019158998A2 (en) 2018-02-14 2019-08-22 Lenovo (Singapore) Ltd. Determining linked bandwidth parts
BR112020016542A2 (pt) 2018-02-15 2021-03-02 Telefonaktiebolaget Lm Ericsson (Publ) métodos realizados por um dispositivo sem fio e por uma estação base para realizar um procedimento de acesso aleatório, método do dispositivo sem fio, dispositivo sem fio, e, estação base.
KR102456934B1 (ko) * 2018-02-28 2022-10-21 삼성전자주식회사 무선 통신 시스템에서의 데이터 송수신 방법 및 장치
MX2020010296A (es) * 2018-03-30 2020-10-28 Guangdong Oppo Mobile Telecommunications Corp Ltd Metodo y dispositivo de acceso aleatorio.
CN110474735B (zh) * 2018-05-11 2021-03-23 华为技术有限公司 通信方法和通信装置
US11690066B2 (en) * 2018-07-30 2023-06-27 Qualcomm Incorporated Retransmission and fallback for autonomous uplink transmission
CN110856267B (zh) * 2018-08-20 2021-10-01 华为技术有限公司 一种通信方法及设备
US11070328B2 (en) * 2018-09-27 2021-07-20 Ofinno, Llc Bandwidth parts operation in multiple active bandwidth parts
CN113475113B (zh) 2018-12-21 2024-06-25 三星电子株式会社 处理多个活动bwp的方法和装置
CN113395734A (zh) * 2020-03-13 2021-09-14 华为技术有限公司 一种通信方法及装置
WO2022061774A1 (zh) * 2020-09-25 2022-03-31 Oppo广东移动通信有限公司 无线通信方法和终端
WO2023279297A1 (zh) * 2021-07-07 2023-01-12 北京小米移动软件有限公司 随机接入方法、装置及存储介质

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101640922A (zh) * 2009-01-24 2010-02-03 中兴通讯股份有限公司 一种随机接入过程中下行分量载波的标识方法及一种基站
CN101772182A (zh) * 2009-01-05 2010-07-07 大唐移动通信设备有限公司 随机接入的方法及设备
CN101778482A (zh) * 2009-01-09 2010-07-14 华为技术有限公司 初始网络接入的方法及装置
US20150085689A1 (en) * 2013-09-26 2015-03-26 Sierra Wireless, Inc. Method and apparatus for communicating with lte terminals having restricted capabilities
WO2017031676A1 (en) * 2015-08-25 2017-03-02 Lenovo Innovations Limited (Hong Kong) Random access procedure for machine type communication

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9673945B2 (en) * 2011-02-18 2017-06-06 Qualcomm Incorporated Implicitly linking aperiodic channel state information (A-CSI) reports to CSI-reference signal (CSI-RS) resources
JP7187452B2 (ja) * 2016-10-19 2022-12-12 アイピーエルエー ホールディングス インコーポレイテッド 装置
WO2019021443A1 (ja) * 2017-07-27 2019-01-31 株式会社Ｎｔｔドコモ ユーザ端末及び無線通信方法
US10687365B2 (en) * 2017-08-01 2020-06-16 Htc Corporation Device and method of handling bandwidth parts
EP3668213A4 (en) * 2017-08-10 2021-01-20 Ntt Docomo, Inc. USER TERMINAL DEVICE AND WIRELESS COMMUNICATION PROCEDURE
WO2019066533A1 (en) * 2017-09-29 2019-04-04 Samsung Electronics Co., Ltd. APPARATUS AND METHOD FOR MANAGING CONFIGURATION OF BANDWIDTH PARTIES FOR RANDOM ACCESS CHANNEL PROCEDURE IN WIRELESS COMMUNICATION SYSTEM
CN111279783B (zh) * 2017-10-24 2023-09-26 Lg电子株式会社 在无线通信系统中执行随机接入过程的方法和设备
WO2019094781A2 (en) * 2017-11-09 2019-05-16 Ofinno Technologies, Llc Communications based on wireless device capabilities
CN111345091B (zh) * 2017-11-13 2023-05-02 日本电气株式会社 无线电接入网节点及其方法
TWI674811B (zh) * 2017-11-16 2019-10-11 財團法人資訊工業策進會 用於行動通訊系統之使用者裝置及基地台
CA3024549A1 (en) * 2017-11-16 2019-05-16 Comcast Cable Communications, Llc Power control for bandwidth part switching
US10638507B2 (en) * 2017-11-16 2020-04-28 Sharp Kabushiki Kaisha User equipments, base stations and methods
US11399393B2 (en) * 2019-01-09 2022-07-26 Ofinno, Llc Random access backoff indicator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101772182A (zh) * 2009-01-05 2010-07-07 大唐移动通信设备有限公司 随机接入的方法及设备
CN101778482A (zh) * 2009-01-09 2010-07-14 华为技术有限公司 初始网络接入的方法及装置
CN101640922A (zh) * 2009-01-24 2010-02-03 中兴通讯股份有限公司 一种随机接入过程中下行分量载波的标识方法及一种基站
US20150085689A1 (en) * 2013-09-26 2015-03-26 Sierra Wireless, Inc. Method and apparatus for communicating with lte terminals having restricted capabilities
WO2017031676A1 (en) * 2015-08-25 2017-03-02 Lenovo Innovations Limited (Hong Kong) Random access procedure for machine type communication

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021159626A1 (zh) * 2020-02-14 2021-08-19 富士通株式会社 上行传输方法以及装置
US12323973B2 (en) 2020-02-14 2025-06-03 Fujitsu Limited Uplink transmission method and apparatus

Also Published As

Publication number Publication date
CN111165060A (zh) 2020-05-15
US20190223227A1 (en) 2019-07-18
JP7024867B2 (ja) 2022-02-24
CN111165060B (zh) 2024-02-13
US12160893B2 (en) 2024-12-03
JP2021503744A (ja) 2021-02-12
US11064527B2 (en) 2021-07-13
US20210282192A1 (en) 2021-09-09

Similar Documents

Publication Publication Date Title
US12160893B2 (en) Random access method and apparatus and communication system
US11140676B2 (en) Data transmission method, terminal device, and access network device
US11109247B2 (en) Beam failure recovery method, device, and apparatus
CN111869152B (zh) 波束指示方法、装置和系统
US12010697B2 (en) Method and apparatus for supporting multiple configuration grants for sidelink data transmission
BR112020022591A2 (pt) Método de comunicação sem fio para um espectro não licenciado, dispositivo terminal for um espectro não licenciado e dispositivo terminal para um espectro não licenciado
EP4193767A1 (en) Method and apparatus for pusch repetition in a random access procedure
US10623981B2 (en) Information transmission method, apparatus, and system
WO2020220290A1 (zh) 边链路数据的发送和接收方法以及装置
CN109891965B (zh) 上行传输控制方法及其装置、通信系统
CN113228580B (zh) 配置和确定寻呼机会的方法、装置和系统
JP7338725B2 (ja) システム情報の指示方法、装置及び通信システム
JP7386856B2 (ja) ランダムアクセス構成方法、信号送信方法、装置及び通信システム
JP2023500077A (ja) ランダムアクセス方法、装置及び通信システム
CN110784895A (zh) 由用户设备执行的方法以及用户设备
CN107710822A (zh) 载波跳转的方法、终端和基站
JP2024069386A (ja) アップリンク伝送方法及び装置
JP2022549691A (ja) ランダムアクセス方法、装置及び通信システム
WO2023010368A1 (zh) 收发信号的方法、装置和通信系统
CN113645679B (zh) 数据传输时的波束确定方法及装置、存储介质、ue、基站
WO2023010351A1 (zh) 无线通信方法、装置、设备及存储介质
WO2019136676A1 (zh) 在部分带宽上进行半静态调度的装置及方法
WO2021159401A1 (zh) 随机接入方法、装置和通信系统
JP7310951B2 (ja) ランダムアクセス方法、装置及び通信システム
WO2020252633A1 (zh) 随机接入前导码退避的方法、装置和系统

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17932095

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2020524744

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17932095

Country of ref document: EP

Kind code of ref document: A1