WO2020147130A1 - 随机接入方法、装置及存储介质 - Google Patents
随机接入方法、装置及存储介质 Download PDFInfo
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- 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 signaling, i.e. of overhead other than pilot signals
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/14—Spectrum sharing arrangements between different networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/11—Allocation or use of connection identifiers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/26—Network addressing or numbering for mobility support
Definitions
- the present disclosure relates to the field of wireless communication technology, and in particular to a random access method, device, and storage medium.
- the NR-U access technology in the wireless communication system also needs to introduce a listen before talk (LBT) mechanism, so that it can coexist fairly with other different wireless access technologies.
- LBT listen before talk
- the present disclosure provides a random access method, device and storage medium.
- the technical solution is as follows:
- a random access method is provided, the method is executed by a base station, and the method includes:
- the RAR contains resource indication information for indicating at least two time-frequency units, and the at least two time-frequency units are time-frequency units on an unlicensed channel Time-frequency units with different domains;
- the first MSG3 Receiving a first random access message three MSG3 sent by the first terminal on a first time-frequency unit, where the first time-frequency unit is any one of the at least two time-frequency units; the first MSG3 Contains the terminal identifier of the first terminal;
- the first MSG4 carries the terminal identity of the first terminal, and the first cell wireless network temporary identity C allocated to the first terminal -RNTI.
- the method before the sending the first random access message 4 MSG4 to the first terminal, the method further includes:
- the MSG3 that two or more terminals feed back to the RAR is parsed on the first time-frequency unit, it is determined that the first terminal of the two or more terminals is the random The terminal that is connected successfully.
- the receiving the first random access message three MSG3 sent by the first terminal on the first time-frequency unit includes:
- the method further includes:
- the second MSG3 includes the first 2. Terminal identification of the terminal;
- the second MSG4 carries the terminal identity of the second terminal, and the second cell wireless network temporary identity C allocated to the second terminal -RNTI; the first C-RNTI is different from the second C-RNTI.
- the terminal identifier is the international mobile terminal identification code IMSI of the corresponding terminal or a random number.
- the at least two time-frequency units are at least two time-frequency units that are the same in the frequency domain and continuous in the time domain;
- the at least two time-frequency units are at least two time-frequency units that are the same in the frequency domain and are not continuous in the time domain;
- the at least two time-frequency units are at least two time-frequency units that are different in the frequency domain and continuous in the time domain;
- the at least two time-frequency units are at least two time-frequency units that are different in the frequency domain and are not continuous in the time domain.
- the resource indication information is used to indicate the starting time-frequency positions of the at least two time-frequency units.
- a random access method the method is executed by a terminal, and the method includes:
- the sending the first random access message three MSG3 to the base station on the first time-frequency unit includes:
- the first MSG3 is sent on the first time-frequency unit through the LBT manner of listening before speaking.
- the terminal identifier is the international mobile terminal identification code IMSI of the corresponding terminal or a random number.
- the at least two time-frequency units are at least two time-frequency units that are the same in the frequency domain and continuous in the time domain;
- the at least two time-frequency units are at least two time-frequency units that are the same in the frequency domain and are not continuous in the time domain;
- the at least two time-frequency units are at least two time-frequency units that are different in the frequency domain and continuous in the time domain;
- the at least two time-frequency units are at least two time-frequency units that are different in the frequency domain and are not continuous in the time domain.
- the resource indication information is used to indicate the starting time-frequency positions of the at least two time-frequency units.
- a random access device used in a base station, and the device includes:
- the first receiving module is configured to receive a random access preamble
- the first sending module is configured to send a random access response RAR according to the received random access preamble.
- the RAR includes resource indication information for indicating at least two time-frequency units, and the at least two time-frequency units
- the frequency unit is a time-frequency unit with different time domains on the unlicensed channel;
- the second receiving module is configured to receive the first random access message MSG3 sent by the first terminal on the first time-frequency unit, where the first time-frequency unit is any one of the at least two time-frequency units Unit; the first MSG3 contains the terminal identification of the first terminal;
- the second sending module is configured to send a first random access message MSG4 to the first terminal.
- the first MSG4 carries the terminal identifier of the first terminal and the first terminal allocated to the first terminal.
- the device further includes:
- the determining module is configured to, before the second sending module sends the first random access message MSG4 to the first terminal, when the first time-frequency unit analyzes that two or more terminal pairs are paired respectively When the MSG3 fed back by the RAR is used, it is determined that the first terminal of the two or more terminals is the terminal that has succeeded in random access this time.
- the second receiving module is specifically configured to:
- the device further includes:
- the third receiving module is configured to receive the second MSG3 sent by the second terminal on the second time-frequency unit, where the second time-frequency unit is another time-frequency unit of the at least two time-frequency units; 2.
- MSG3 contains the terminal identifier of the second terminal;
- the third sending module is configured to send a second random access message MSG4 to the second terminal, and the second MSG4 carries the terminal identifier of the second terminal and the second terminal allocated to the second terminal.
- the terminal identifier is the international mobile terminal identification code IMSI of the corresponding terminal or a random number.
- the at least two time-frequency units are at least two time-frequency units that are the same in the frequency domain and continuous in the time domain;
- the at least two time-frequency units are at least two time-frequency units that are the same in the frequency domain and are not continuous in the time domain;
- the at least two time-frequency units are at least two time-frequency units that are different in the frequency domain and continuous in the time domain;
- the at least two time-frequency units are at least two time-frequency units that are different in the frequency domain and are not continuous in the time domain.
- the resource indication information is used to indicate the starting time-frequency positions of the at least two time-frequency units.
- a random access device used in a terminal, and the device includes:
- the fourth sending module is used to send a random access preamble to the base station
- the fourth receiving module is configured to receive a random access response RAR sent by the base station.
- the RAR contains resource indication information for indicating at least two time-frequency units, and the at least two time-frequency units are on an unlicensed channel. Different time-frequency units in the time domain;
- the fifth sending module is configured to send a first random access message three MSG3 to the base station on a first time-frequency unit, where the first time-frequency unit is any one of the at least two time-frequency units ;
- the first MSG3 contains the terminal identifier of the terminal;
- the fifth receiving module is configured to receive the first random access message MSG4 sent by the base station, the first MSG4 carries the terminal identifier of the terminal, and the first terminal allocated by the base station to the first terminal A cell radio network temporary identification C-RNTI.
- the fifth sending module is specifically configured to:
- the first MSG3 is sent on the first time-frequency unit through the LBT manner of listening before speaking.
- the terminal identifier is the international mobile terminal identification code IMSI of the corresponding terminal or a random number.
- the at least two time-frequency units are at least two time-frequency units that are the same in the frequency domain and continuous in the time domain;
- the at least two time-frequency units are at least two time-frequency units that are the same in the frequency domain and are not continuous in the time domain;
- the at least two time-frequency units are at least two time-frequency units that are different in the frequency domain and continuous in the time domain;
- the at least two time-frequency units are at least two time-frequency units that are different in the frequency domain and are not continuous in the time domain.
- the resource indication information is used to indicate the starting time-frequency positions of the at least two time-frequency units.
- a random access device characterized in that the device is used in a base station, and the device includes:
- a memory for storing executable instructions of the processor
- the processor is configured to:
- the RAR contains resource indication information for indicating at least two time-frequency units, and the at least two time-frequency units are time-frequency units on an unlicensed channel Time-frequency units with different domains;
- the first MSG3 Receiving a first random access message three MSG3 sent by the first terminal on a first time-frequency unit, where the first time-frequency unit is any one of the at least two time-frequency units; the first MSG3 Contains the terminal identifier of the first terminal;
- the first MSG4 carries the terminal identity of the first terminal, and the first cell wireless network temporary identity C allocated to the first terminal -RNTI.
- a random access device used in a first terminal, and the device includes:
- a memory for storing executable instructions of the processor
- the processor is configured to:
- a computer-readable storage medium containing executable instructions, and a processor in a base station invokes the executable instructions to implement the above-mentioned first aspect Or the random access method described in any optional implementation of the first aspect.
- a computer-readable storage medium contains executable instructions, and a processor in a terminal invokes the executable instructions to implement the above-mentioned second aspect Or the random access method described in any optional implementation of the second aspect.
- the random access preamble is received by the base station; the random access response RAR is sent according to the received random access preamble, the RAR includes resource indication information for indicating at least two time-frequency units, and the at least two The time-frequency unit is a time-frequency unit with different time domains on the unlicensed channel; receives the first random access message three MSG3 sent by the first terminal on the first time-frequency unit, and sends the first random access message four MSG4 to the first terminal , The first MSG4 carries the terminal identifier of the first terminal and the first cell radio network temporary identifier C-RNTI allocated to the first terminal.
- the first terminal can directly acquire the C-RNTI carried in the MSG4 as its own C-RNTI by receiving the MSG4, so that the base station can correctly address the first terminal through the C-RNTI. That is to say, when the base station in the present disclosure receives MSG3 fed back from different terminals to the same RAR at different times, it can allocate different C-RNTIs to different terminals, thereby realizing random access based on unlicensed channels and avoiding the first Under the LBT mechanism, the terminal has the same C-RNTI problem as other terminals in the NR-U-based random access process.
- Fig. 1 is a schematic structural diagram of a wireless communication system according to some exemplary embodiments
- Figure 2 is a schematic diagram of a random access process provided by an embodiment of the present disclosure
- FIG. 3 is a schematic diagram of a random access failure of a terminal due to LBT failure according to an embodiment of the present disclosure
- FIG. 4 is a schematic diagram of a random access process based on multiple TxOPs provided by an embodiment of the present disclosure
- FIG. 5 is a schematic diagram of a random access process provided by an embodiment of the present disclosure.
- FIG. 6 is a method flowchart of a random access method provided by an embodiment of the present disclosure.
- FIG. 7 is a method flowchart of a random access method provided by an embodiment of the present disclosure.
- FIG. 8 is a method flowchart of a random access method provided by an embodiment of the present disclosure.
- FIG. 9 is a schematic diagram of at least two time-frequency units involved in an embodiment of the present disclosure.
- 10 to 13 are schematic diagrams of three time-frequency units included in one time-frequency resource involved in the embodiments of the present disclosure.
- FIG. 14 is a schematic diagram of a terminal sending MSG3 to a base station according to an embodiment of the present disclosure
- FIG. 15 is a schematic diagram of a random access procedure involved in an embodiment of the present disclosure.
- Fig. 16 is a block diagram showing a random access device according to an exemplary embodiment
- Fig. 17 is a block diagram showing a random access device according to an exemplary embodiment
- Fig. 18 is a schematic structural diagram showing a random access device according to an exemplary embodiment.
- the radio frequency spectrum resource is a limited and non-renewable natural resource. Therefore, various countries have special management agencies for the radio frequency spectrum and have issued special policies and regulations to realize the unified planning and management of the radio frequency spectrum.
- the spectrum management in most countries adopts fixed spectrum allocation strategy, that is, spectrum resources are managed by government authorities and allocated to fixed authorized users. This can ensure that users avoid excessive mutual interference and make better use of spectrum resources.
- spectrum resources can be divided into two categories, namely, licensed spectrum (Licensed Spectrum) and unlicensed spectrum (Unlicensed Spectrum).
- the authorized spectrum is strictly restricted and protected, and only authorized users and their compliant devices are allowed to access, and users usually have to pay for this.
- important departments such as public security, railways, civil aviation, radio and television, and telecommunications all have certain authorized spectrum.
- the communication of equipment in these departments is running on their authorized spectrum, especially in the telecommunications industry.
- the mobile phones we use every day are operated All major operators have dedicated frequency bands authorized by radio management units or departments in their respective countries to protect public mobile communications from interference.
- Unlicensed spectrum is a spectrum that can be accessed and used by devices that meet certain specifications and standards, but it must be guaranteed not to cause interference to other users.
- communication technologies such as Wireless Fidelity (Wi-Fi) and Bluetooth (Bluetooth, BT) are transmitted through unlicensed spectrum.
- Wi-Fi Wireless Fidelity
- Bluetooth Bluetooth
- ISM Industrial Scientific Medical
- NR-generation fifth-generation mobile communication technology
- 5G fifth-generation mobile communication technology
- NR new radio
- 3rd Generation Partnership Project 3rd Generation Partnership Project
- the organization passed the 5G research project "Study on NR-based Access to Unlicensed Spectrum” (NR-based unlicensed spectrum access research), referred to as NR-U, which aims to enable NR to meet the requirements of unlicensed frequency bands through the research of this project. It is required by regulations and can guarantee peaceful coexistence with other access technologies working on unlicensed frequency bands.
- the embodiments of the present disclosure provide a random access scheme based on NR-U research, which can be used in a wireless communication system to realize a connection between a terminal and a base station.
- FIG. 1 is a schematic structural diagram of a wireless communication system according to some exemplary embodiments.
- the mobile communication system is a communication system based on cellular mobile communication technology.
- the mobile communication system may include : Several terminals 110 and several base stations 120.
- the terminal 110 may be a device that provides voice and/or data connectivity to the user.
- the terminal 110 can communicate with one or more core networks via a radio access network (RAN).
- RAN radio access network
- the terminal 110 can be an IoT terminal, such as a sensor device, a mobile phone (or “cellular” phone), and
- the computer of the Internet of Things terminal for example, may be a fixed, portable, pocket-sized, handheld, computer-built or vehicle-mounted device.
- station Station, STA
- subscriber unit subscriber unit
- subscriber station subscriber station
- mobile station mobile station
- mobile station mobile
- remote station remote station
- access terminal access terminal
- user device user terminal
- user agent user agent
- user equipment user device
- user terminal user equipment
- UE user terminal
- the terminal 110 may also be a device of an unmanned aerial vehicle.
- the base station 120 may be a network side device in a wireless communication system.
- the wireless communication system may be the 4th generation mobile communication (4G) system, also known as the Long Term Evolution (LTE) system; or, the wireless communication system may also be a 5G system, Also known as the new radio (NR) system. Alternatively, the wireless communication system may also be the next-generation system of the 5G system.
- 4G 4th generation mobile communication
- LTE Long Term Evolution
- NR new radio
- the wireless communication system may also be the next-generation system of the 5G system.
- the base station 120 may be an evolved base station (eNB) used in a 4G system.
- the base station 120 may also be a base station (gNB) adopting a centralized and distributed architecture in the 5G system.
- eNB evolved base station
- gNB base station
- the base station 120 adopts a centralized and distributed architecture it usually includes a centralized unit (CU) and at least two distributed units (DU).
- the centralized unit is provided with a packet data convergence protocol (Packet Data Convergence Protocol, PDCP) layer, a radio link layer control protocol (Radio Link Control, RLC) layer, and a media access control (Media Access Control, MAC) layer protocol stack; distribution
- PDCP Packet Data Convergence Protocol
- RLC Radio Link Control
- MAC media access control
- PHY physical
- a wireless connection can be established between the base station 120 and the terminal 110 through a wireless air interface.
- the wireless air interface is a wireless air interface based on the fourth-generation mobile communication network technology (4G) standard; or, the wireless air interface is a wireless air interface based on the fifth-generation mobile communication network technology (5G) standard, such as The wireless air interface is a new air interface; or, the wireless air interface may also be a wireless air interface based on 5G-based next-generation mobile communication network technology standards.
- the foregoing wireless communication system may further include a network management device 130.
- the network management device 130 may be a core network device in a wireless communication system.
- the network management device 130 may be a mobility management entity (Mobility Management Entity) in an Evolved Packet Core (EPC) network. MME).
- the network management device may also be other core network devices, such as Serving GateWay (SGW), Public Data Network GateWay (PGW), Policy and Charging Rules function unit (Policy and Charging Rules). Function, PCRF) or Home Subscriber Server (HSS), etc.
- SGW Serving GateWay
- PGW Public Data Network GateWay
- Policy and Charging Rules function unit Policy and Charging Rules
- Function PCRF
- HSS Home Subscriber Server
- the terminals and base stations in the above-mentioned wireless communication system may have the ability to use unlicensed frequency bands based on cellular mobile communication technology (such as NR-U capabilities), and correspondingly, have the ability to use non-licensed frequency bands based on cellular mobile communication technology.
- a terminal capable of a licensed frequency band can initiate a random access request to a base station with the same ability on an unlicensed frequency band.
- FIG. 2 shows a schematic diagram of a random access process provided by an embodiment of the present disclosure. as shown in picture 2,
- step 201 the terminal randomly selects a preamble from the preamble resource pool and sends it to the base station, and the message containing the preamble is also called random access message one (MSG1).
- the base station performs correlation detection on the received signal to identify the preamble sent by the user.
- the base station sends a random access response (Random Access Response, RAR) to the terminal.
- RAR is also called a random access message 2 (MSG2).
- the RAR contains a random access preamble identifier and is based on the terminal and the base station.
- Information such as the timing advance instruction determined by the time delay estimation, the Temporary Cell-Radio Network Temporary Identifier (TC-RNTI), and the time-frequency resources allocated for the terminal's next uplink transmission.
- TC-RNTI Temporary Cell-Radio Network Temporary Identifier
- the terminal sends a random access message 3 (MSG3) to the base station according to the information in the RAR.
- the MSG3 contains information such as a terminal identifier and a radio resource control (Radio Resource Control, RRC) link request, where the terminal identifier may be a unique identifier corresponding to the terminal.
- RRC Radio Resource Control
- the terminal identification may be the terminal’s International Mobile Subscriber Identification Number (IMSI); when the terminal is in the connected state (CONNECTED state) ), the terminal identifier may be a Cell-Radio Network Temporary Identifier (C-RNTI) to which the terminal has been allocated.
- IMSI International Mobile Subscriber Identification Number
- C-RNTI Cell-Radio Network Temporary Identifier
- the base station sends a conflict resolution identification (also referred to as MSG4) to the terminal, which contains the identification of the terminal that won the conflict resolution.
- MSG4 a conflict resolution identification
- the terminal After the terminal detects its own identity, if the terminal is in the idle state (Idle state), it will upgrade the TC-RNTI to C-RNTI, and send an Acknowledgement (ACK) signal to the base station to complete the random connection. Enter the process and wait for the scheduling of the base station.
- FIG. 3 shows a schematic diagram of a random access failure of a terminal due to LBT failure according to an embodiment of the present disclosure.
- the terminal sends MSG1 to the base station during initial random access. After receiving the MSG1 sent by the terminal, the base station responds to it and sends MSG2 to allocate uplink resources.
- the terminal can perform LBT before sending MSG3. Detecting that the channel is busy (as shown by the busy channel in Figure 3), the terminal will not be able to send MSG3 on the allocated uplink resources, which will cause the terminal to fail in random access (as shown by the dotted line in Figure 3) .
- FIG. 4 shows a schematic diagram of a random access process based on multiple TxOPs provided by an embodiment of the present disclosure.
- a time window 401 is included.
- the terminal can still send MSG1 to the base station during initial random access. After receiving the MSG1 sent by the terminal, the base station responds to it and sends MSG2 to allocate uplink resources.
- This uplink resource can have multiple TxOPs, that is, in the time window 401 It may contain multiple time-frequency units.
- the terminal can detect the time-frequency unit of the uplink resource in the idle state when performing LBT in the time window 401, and the terminal can send MSG3 to the base station through the time-frequency unit in the idle state. , So that the terminal can still detect other idle time-frequency units after monitoring the state of the time-frequency unit as the "channel busy" state, and continue the subsequent random access steps, avoiding the failure of the terminal due to an LBT. Circumstances that cause the random access of the terminal to fail.
- the introduction of multiple MSG3 TxOPs may cause the multiple terminals to send the same MSG1 on the allocated time-frequency units.
- MSG3 responds to the same MSG2.
- the base station can receive MSG3 from multiple terminals at different times and send MSG4 at different times.
- each terminal detects the MSG3 sent by itself and the received MSG4
- the terminal identifier matches it declares that its random access is successful. If multiple terminals are in the IDLE state at this time, the TC-RNTI indicated in the same MSG2 will be upgraded to their own C-RNTI, resulting in multiple terminals having the same C-RNTI.
- FIG. 5 shows a schematic diagram of a random access process provided by an embodiment of the present disclosure.
- Fig. 5 it contains two terminals UE1 and UE2 in an idle state, and the accessible base station gNB.
- the first time-frequency unit starts at time t1, and the second time-frequency unit t2.
- UE1 and UE2 can send the same MSG1 on the same time-frequency resource during initial access.
- the gNB receives the same MSG1, it can send the same MSG2.
- UE1 and UE2 can also get the same TC- RNTI, and send MSG3 on the corresponding time-frequency resources according to the respective LBT results, that is, as shown in Figure 5, UE1 sends MSG3 at t1, and UE2 sends MSG3 at t2.
- gNB can receive MSG3 sent by UE1 and UE2 at different times, and send the corresponding MSG4 respectively, and UE1 and UE2 respectively will receive the terminal identification carried in the received MSG4 Comparing with the terminal identification carried in the MSG3 sent by itself, when the terminal identification matches, the corresponding terminal announces that the random access is successful, and respectively upgrade the TC-RNTI obtained from MSG2 to its own C-RNTI.
- FIG. 6 shows a method flowchart of a random access method provided by an embodiment of the present disclosure.
- the NR-U random access process between the terminal and the base station can be performed by the base station supporting the NR-U capability in the wireless communication system.
- the method may include The following steps:
- step 601 receive a random access preamble
- a random access response RAR is sent according to the received random access preamble.
- the RAR contains resource indication information for indicating at least two time-frequency units, and the at least two time-frequency units are time domains on the unlicensed channel. Different time-frequency units;
- step 603 the first random access message three MSG3 sent by the first terminal on the first time-frequency unit is received, where the first time-frequency unit is any one of the at least two time-frequency units; in the first MSG3 Contains the terminal identification of the first terminal;
- a first random access message 4 MSG4 is sent to the first terminal.
- the first MSG4 carries the terminal identification of the first terminal and the first cell radio network temporary identification C-RNTI allocated to the first terminal.
- the method before sending the first random access message 4 MSG4 to the first terminal, the method further includes:
- the receiving the first random access message three MSG3 sent by the first terminal on the first time-frequency unit includes:
- the method further includes:
- the first C-RNTI is different from the second C-RNTI.
- the terminal identifier is the international mobile terminal identification code IMSI of the corresponding terminal or a random number.
- the at least two time-frequency units are the same in the frequency domain and at least two consecutive time-frequency units in the time domain;
- the at least two time-frequency units are at least two time-frequency units that are the same in the frequency domain and are not continuous in the time domain;
- the at least two time-frequency units are at least two time-frequency units that are different in the frequency domain and are continuous in the time domain;
- the at least two time-frequency units are at least two time-frequency units that are different in the frequency domain and are not continuous in the time domain.
- the resource indication information is used to indicate the starting time-frequency positions of the at least two time-frequency units.
- the random access preamble is received by the base station; the random access response RAR is sent according to the received random access preamble, and the RAR contains resource indication information for indicating at least two time-frequency units, And the at least two time-frequency units are time-frequency units with different time domains on the unlicensed channel; receive the first random access message three MSG3 sent by the first terminal on the first time-frequency unit, and send the first random access message to the first terminal Access message four MSG4.
- the first MSG4 carries the terminal identifier of the first terminal and the first cell radio network temporary identifier C-RNTI allocated for the first terminal.
- the first terminal can directly acquire the C-RNTI carried in the MSG4 as its own C-RNTI by receiving the MSG4, so that the base station can correctly address the first terminal through the C-RNTI. That is to say, when the base station in the present disclosure receives MSG3 fed back by different terminals to the same RAR at different times, it can allocate different C-RNTIs to different terminals, thereby realizing contention-based random access based on unlicensed channels and avoiding In the LBT mechanism, the first terminal has the same C-RNTI problem with other terminals in the NR-U-based contention-based random access process.
- FIG. 7 shows a method flowchart of a random access method provided by an embodiment of the present disclosure.
- the method can be used in the wireless communication system shown in FIG.
- the random access process can be performed by a terminal supporting NR-U capability in the wireless communication system.
- the method can include the following steps:
- step 701 send a random access preamble to the base station
- step 702 receive a random access response RAR sent by the base station, where the RAR includes resource indication information for indicating at least two time-frequency units, and the at least two time-frequency units are time-frequency units with different time domains on the unlicensed channel;
- step 703 the first random access message three MSG3 is sent to the base station on the first time-frequency unit, the first time-frequency unit is any one of the at least two time-frequency units; the first MSG3 contains the terminal’s information Terminal identification
- a first random access message 4 MSG4 sent by the base station is received.
- the first MSG4 carries the terminal identification of the terminal and the first cell radio network temporary identification C-RNTI allocated by the base station to the first terminal.
- the foregoing sending the first random access message three MSG3 to the base station on the first time-frequency unit includes:
- the first MSG3 is sent on the first time-frequency unit through the LBT mode of listening before speaking.
- the terminal identifier is the international mobile terminal identification code IMSI of the corresponding terminal or a random number.
- the at least two time-frequency units are the same in the frequency domain and at least two consecutive time-frequency units in the time domain;
- the at least two time-frequency units are at least two time-frequency units that are the same in the frequency domain and are not continuous in the time domain;
- the at least two time-frequency units are at least two time-frequency units that are different in the frequency domain and are continuous in the time domain;
- the at least two time-frequency units are at least two time-frequency units that are different in the frequency domain and are not continuous in the time domain.
- the resource indication information is used to indicate the starting time-frequency positions of the at least two time-frequency units.
- the random access preamble is received by the base station; the random access response RAR is sent according to the received random access preamble, and the RAR contains resource indication information for indicating at least two time-frequency units, And the at least two time-frequency units are time-frequency units with different time domains on the unlicensed channel; receive the first random access message three MSG3 sent by the first terminal on the first time-frequency unit, and send the first random access message to the first terminal Access message four MSG4.
- the first MSG4 carries the terminal identifier of the first terminal and the first cell radio network temporary identifier C-RNTI allocated for the first terminal.
- the first terminal can directly acquire the C-RNTI carried in the MSG4 as its own C-RNTI by receiving the MSG4, so that the base station can correctly address the first terminal through the C-RNTI. That is to say, when the base station in the present disclosure receives MSG3 fed back by different terminals to the same RAR at different times, it can allocate different C-RNTIs to different terminals, thereby realizing contention-based random access based on unlicensed channels and avoiding In the LBT mechanism, the first terminal has the same C-RNTI problem with other terminals in the NR-U-based contention-based random access process.
- a base station that supports NR-U capabilities can broadcast system messages through unicast radio resource control RRC signaling, and corresponding terminals that support NR-U capabilities can After receiving the system message broadcast by the base station, the terminal that needs to access the base station can generate MSG1 for contention-based random access according to the information carried in the system message, send the MSG1 to the base station, and start the process of accessing the base station.
- RRC radio resource control
- FIG. 8 shows a method flowchart of a random access method provided by an embodiment of the present disclosure.
- the random access method can be applied to the wireless communication system shown in FIG.
- the method can include the following steps:
- step 801 the terminal sends a random access preamble to the base station.
- the base station receives the random access preamble sent by the terminal.
- the terminal can check the preamble information carried in the master information module MIB or the system information block SIB in the acquired system message and the physical random access channel (Physical Random Access Channel, PRACH) required for random access. ), including the number and time-frequency position of PRACH.
- the terminal can parse out the Preamble information and configure it to the MAC.
- the MAC randomly selects a Preamble index from the Preamble set and configures it to the physical layer.
- the physical layer generates a valid one by looking up the table/formula according to the preamble index of the MAC
- the random access preamble is sent to the base station, and the base station can receive the random access preamble sent by the terminal on the corresponding PRACH channel resource.
- the above-mentioned PRACH channel resources may include channel resources on an unlicensed channel, that is, in the embodiments of the present disclosure, when the terminal has the ability to use an unlicensed frequency band based on cellular mobile communication technology, it may be in an unlicensed frequency band.
- the random access preamble is sent on the corresponding time-frequency resource.
- the base station may correspondingly receive the random access preamble sent by multiple terminals.
- step 802 the base station sends a random access response RAR according to the received random access preamble.
- the terminal receives the random access response RAR sent by the base station.
- the RAR includes resource indication information for indicating at least two time-frequency units, and the at least two time-frequency units are time-frequency units with different time domains on the unlicensed channel.
- the base station when the base station receives the random access preamble on the unlicensed frequency band, the base station may also send the RAR corresponding to the random access preamble on the time-frequency resource corresponding to the unlicensed frequency band.
- the base station can blindly detect the random access preamble sent by the terminal in the PRACH. If the base station detects the random access preamble sent by the terminal, the base station can also report it to the MAC, and the MAC generates the random access preamble received by the base station. After entering the random access response RAR corresponding to the preamble, the base station can subsequently respond to the random access of the terminal in the time-frequency resource, and feed the random access response RAR back to the terminal through the Physical Downlink Shared Channel (PDSCH) .
- PDSCH Physical Downlink Shared Channel
- the base station can use the random access radio network temporary identity (Random Access-Radio Network Temporary Identity, RA-RNTI) to the physical downlink control channel (Physical Downlink Controled Channel, PDCCH) corresponding to the PDSCH in the process of sending the RAR. Perform scrambling.
- the RA-RNTI corresponds to the time-frequency resources occupied by the preamble detected by the base station.
- the terminal can also calculate the corresponding RA-RNTI and use the RA-RNTI to descramble the PDCCH, thereby further decoding the channel content of the PDSCH.
- the TC-RNTI may be carried in the RAR for the terminal to upgrade the TC-RNTI in the subsequent random access process and obtain it as a C-RNTI.
- the RAR of the present disclosure does not necessarily need to use C-RNTI for scrambling. That is, the base station can use TC-RNTI to scramble the RAR, or not use TC-RNTI to scramble the RAR.
- the allocation of RNTI can be completed by subsequent random access steps.
- the RAR that the base station feeds back to the terminal through the PDSCH may contain resource indication information used to indicate at least two time-frequency units on the unlicensed channel, so that the terminal can pass LBT on the unlicensed channel. Select the appropriate time-frequency unit to send the subsequent MSG3 for random access.
- the resource indication information may be used to indicate the starting time-frequency positions of the at least two time-frequency units.
- FIG. 9 shows a schematic diagram of at least two time-frequency units involved in an embodiment of the present disclosure.
- multiple time-frequency units may be included, and the starting time-frequency position of each time-frequency unit may be indicated by resource indication information.
- the terminal can obtain the information contained in the RAR through corresponding analysis, and send the corresponding MSG3 at the corresponding starting time-frequency position.
- the at least two time-frequency units may be the same in the frequency domain and at least two consecutive in the time domain.
- Time-frequency unit; or, the at least two time-frequency units may be at least two time-frequency units that are the same in the frequency domain and discontinuous in the time domain; or, the at least two time-frequency units may be different in the frequency domain, and At least two time-frequency units that are continuous in the domain; or, the at least two time-frequency units may be at least two time-frequency units that are different in the frequency domain and are not continuous in the time domain.
- FIGS. 10 to 13 show schematic diagrams of three time-frequency units included in one time-frequency resource involved in an embodiment of the present disclosure. As shown in FIGS. 10 to 13, it can be seen that the form of the time-frequency unit included in the time-frequency resource instructing the terminal to send MSG3 in the RAR may be at least one of the above.
- the above-mentioned RAR may be sent by the base station blindly detecting random access preambles sent by multiple terminals, that is, the RAR may be in response to the same sent by multiple terminals on the same time-frequency resource. In this case, multiple terminals can receive the same RAR accordingly.
- step 803 the first terminal sends a first random access message three MSG3 to the base station on the first time-frequency unit.
- the base station receives the first random access message MSG3 sent by the first terminal on the corresponding first time-frequency unit.
- the first terminal may be any one of the RAR terminals that have received feedback from the base station.
- the first time-frequency unit may be any one of the above-mentioned at least two time-frequency units.
- the first terminal may parse the received RAR to obtain the time-frequency resource included in the RAR, and the first terminal may send the first MSG3 on the corresponding time-frequency resource.
- the first terminal detects that there is an idle time-frequency unit among the at least two time-frequency units contained in the LBT monitoring mode, it may send the first MSG3 on the corresponding idle time-frequency unit.
- the first terminal when the first terminal sends the first MSG3, the first terminal may be in a connected state or an idle state, and the first MSG3 sent by the first terminal in the connected state may carry its own C-RNTI,
- the base station addresses the first terminal according to the analyzed CRNTI, and sends MSG4 to the first terminal.
- the first MSG3 sent by the first terminal does not include the C-RNTI.
- the base station can allocate a CRNTI to the first terminal that is not used by other terminals, and carry the CRNTI in MSG4. In, delivered to the first terminal.
- the first terminal may obtain resource indication information of at least two time-frequency units contained in the RAR through analysis, and within a preset time before the start time-frequency position indicated by the resource indication information , Through LBT to monitor whether the corresponding time-frequency unit is free, if the first time-frequency unit is detected to be busy, you can continue to monitor the corresponding time-frequency unit within the preset time before the start time-frequency position of the next time-frequency unit Whether the time-frequency unit is idle, when an idle time-frequency unit is monitored, the first terminal can send the first MSG3 on the corresponding idle time-frequency unit.
- the preset time may be set in the terminal in advance by a developer or operation and maintenance personnel.
- the first MSG3 may include the terminal identification of the first terminal.
- the terminal identification of the first terminal is an international mobile terminal identification code IMSI corresponding to the first terminal or a random number.
- the first time-frequency unit monitored by two or more terminals through the LBT mode can be in an idle state. Accordingly, these All terminals can send MSG3 on the first time-frequency unit, so that there are two or more MSG3 terminals sent to the base station on the first time-frequency unit.
- FIG. 14 shows a schematic diagram of a terminal sending MSG3 to a base station according to an embodiment of the present disclosure. As shown in Figure 14, on the first time-frequency unit, two or more terminals respond to the same RAR (ie MSG2 in the figure) fed back by the base station and send MSG3 to the base station.
- the base station can first determine that the first terminal of the two or more terminals is the terminal that has succeeded in random access this time. Finally, only the MSG4 corresponding to the first terminal can be sent.
- the determination of the first terminal may be similar to the contention resolution based on LTE contention random access, which will not be repeated here.
- the base station may receive the second MSG3 sent by the second terminal on the second time-frequency unit.
- the base station may also receive the second MSG3 sent by the second terminal on the corresponding second time-frequency unit.
- the second time-frequency unit is another time-frequency unit that is different from the first time-frequency unit among the at least two time-frequency units.
- the principle of the second terminal sending the second MSG3 on the second time-frequency unit is similar to the principle of the first terminal sending the first MSG3 on the first time-frequency unit, and will not be repeated here.
- the second MSG3 may include the terminal identifier of the second terminal, and the terminal identifier of the second terminal may be the IMSI corresponding to the second terminal or a random number. It should be noted that the first terminal and the second terminal are different terminals that send the same random access preamble to the base station on the same time-frequency resource in step 801.
- step 804 the base station sends a first random access message MSG4 to the first terminal.
- the first terminal receives the first random access message MSG4 sent by the base station.
- the first MSG4 carries the terminal identifier of the first terminal and the first cell radio network temporary identifier C-RNTI allocated by the base station to the terminal.
- the base station may send the first MSG4 at the time-frequency resource location corresponding to the first time-frequency unit, so as to send the corresponding first MSG4 to the first terminal.
- the first terminal carried in the first MSG4 The terminal identifier of can be obtained by analyzing the MSG3 sent by the first terminal by the base station. For the connected terminal, since the MSG3 sent by the terminal carries the existing C-RNTI, the base station can parse and obtain the C-RNTI of the first terminal , Carry the C-RNTI in MSG4, and send it to the first terminal.
- the base station can allocate a C-RNTI to the first terminal that is not used by other terminals, and carry these two pieces of information (the IMSI of the first terminal and the C-RNTI allocated to the first terminal) In MSG4, it is sent to the first terminal.
- the base station when the base station analyzes the first MSG3 sent by the first terminal in the idle state on the first time-frequency unit, it can analyze which RAR the first MSG3 sent by the first terminal is for. Yes, and select a C-RNTI for the first terminal, and send MSG4 to the first terminal in the idle state.
- the first terminal may declare the success of the random access when the terminal identifier carried in the MSG4 is the same as its own midband identifier according to the terminal identifier carried in the received MSG4 and the C-RNTI allocated by the base station, and The C-RNTI allocated by the base station is used as the identity of itself in the base station, so that the base station can address itself through the corresponding C-RNTI.
- the base station may also allocate a C-RNTI to the second terminal in an idle state that is not used by other terminals, and send a second random access message MSG4 to the second terminal, correspondingly
- the second terminal may also receive MSG4 sent by the base station, and obtain the C-RNTI carried in it as its identity in the base station.
- the C-RNTI allocated to the second terminal by the base station is different from the C-RNTI allocated to the first terminal.
- FIG. 15 shows a schematic diagram of a random access process involved in an embodiment of the present disclosure.
- it contains two idle state terminals UE1 and UE2, a base station gNB that can be accessed, UE1 and UE2 send the same random access preamble on the same time-frequency resource, and the base station gNB is in the same Receive two identical random access preambles at any time, and respond to the same RAR (ie MSG2 in the figure), and broadcast the RAR through system messages.
- RAR ie MSG2 in the figure
- both UE1 and UE2 can receive the RAR, and
- the corresponding MSG3 is sent on the time-frequency unit monitored through the LBT method.
- the base station receives two MSG3s that feed back the same RAR at different times.
- the base station can send the corresponding MSG4 to the two MSG3 respectively.
- the MSG4 except for carrying The IMSI of the corresponding terminal also carries the C-RNTI allocated by the base station to the corresponding terminal.
- the random access principle when the terminal identifier carried in the MSG4 is a random number is similar to that when the terminal identifier carried is the IMSI, and will not be repeated here.
- the random access preamble is received by the base station; the random access response RAR is sent according to the received random access preamble, and the RAR contains resource indication information for indicating at least two time-frequency units, And the at least two time-frequency units are time-frequency units with different time domains on the unlicensed channel; receive the first random access message three MSG3 sent by the first terminal on the first time-frequency unit, and send the first random access message to the first terminal Access message four MSG4.
- the first MSG4 carries the terminal identifier of the first terminal and the first cell radio network temporary identifier C-RNTI allocated for the first terminal.
- the first terminal can directly acquire the C-RNTI carried in the MSG4 as its own C-RNTI by receiving the MSG4, so that the base station can correctly address the first terminal through the C-RNTI. That is to say, when the base station in the present disclosure receives MSG3 fed back by different terminals to the same RAR at different times, it can allocate different C-RNTIs to different terminals, thereby realizing contention-based random access based on unlicensed channels and avoiding In the LBT mechanism, the first terminal has the same C-RNTI problem with other terminals in the NR-U-based contention-based random access process.
- Fig. 16 is a block diagram showing a random access device according to an exemplary embodiment. As shown in Fig. 16, the random access device can be implemented in the implementation environment shown in Fig. 1 through hardware or a combination of software and hardware. All or part of the base station to perform the steps performed by the base station in any of the embodiments shown in FIG. 6 or FIG. 8.
- the random access device may include:
- the first receiving module 1601 is configured to receive a random access preamble
- the first sending module 1602 is configured to send a random access response RAR according to the received random access preamble, and the RAR includes resource indication information for indicating at least two time-frequency units, the at least two The time-frequency unit is a time-frequency unit with different time domains on the unlicensed channel;
- the second receiving module 1603 is configured to receive the first random access message three MSG3 sent by the first terminal on the first time-frequency unit, where the first time-frequency unit is any one of the at least two time-frequency units Frequency unit; the first MSG3 contains the terminal identifier of the first terminal;
- the second sending module 1604 is configured to send a first random access message 4 MSG4 to the first terminal, where the first MSG4 carries the terminal identifier of the first terminal and the terminal assigned to the first terminal The first cell radio network temporary identification C-RNTI.
- the device further includes:
- the determining module is configured to, before the second sending module sends the first random access message MSG4 to the first terminal, when the first time-frequency unit analyzes that two or more terminal pairs are paired respectively When the MSG3 fed back by the RAR is used, it is determined that the first terminal of the two or more terminals is the terminal that has succeeded in random access this time.
- the second receiving module 1603 is specifically configured to:
- the device further includes:
- the third receiving module is configured to receive the second MSG3 sent by the second terminal on the second time-frequency unit, where the second time-frequency unit is another time-frequency unit of the at least two time-frequency units; the first 2.
- MSG3 contains the terminal identifier of the second terminal;
- the third sending module is configured to send a second random access message MSG4 to the second terminal, and the second MSG4 carries the terminal identifier of the second terminal and the second terminal allocated to the second terminal.
- the terminal identifier is the international mobile terminal identification code IMSI of the corresponding terminal or a random number.
- the at least two time-frequency units are at least two time-frequency units that are the same in the frequency domain and continuous in the time domain;
- the at least two time-frequency units are at least two time-frequency units that are the same in the frequency domain and are not continuous in the time domain;
- the at least two time-frequency units are at least two time-frequency units that are different in the frequency domain and continuous in the time domain;
- the at least two time-frequency units are at least two time-frequency units that are different in the frequency domain and are not continuous in the time domain.
- the resource indication information is used to indicate the starting time-frequency positions of the at least two time-frequency units.
- Fig. 17 is a block diagram showing a random access device according to an exemplary embodiment. As shown in Fig. 17, the random access device can be implemented in the implementation environment shown in Fig. 1 through hardware or a combination of software and hardware. All or part of the terminal to perform the steps executed by the terminal in any one of the embodiments shown in FIG. 7 or FIG. 8.
- the random access device may include:
- the fourth sending module 1701 is configured to send a random access preamble to the base station
- the fourth receiving module 1702 is configured to receive a random access response RAR sent by the base station, where the RAR includes resource indication information for indicating at least two time-frequency units, and the at least two time-frequency units are unlicensed channels Different time-frequency units in the upper time domain;
- the fifth sending module 1703 is configured to send a first random access message three MSG3 to the base station on a first time-frequency unit, where the first time-frequency unit is any one of the at least two time-frequency units Unit; the first MSG3 includes the terminal identification of the terminal;
- the fifth receiving module 1704 is configured to receive a first random access message 4 MSG4 sent by the base station, where the first MSG4 carries the terminal identifier of the terminal, and the base station allocated for the first terminal The first cell radio network temporary identification C-RNTI.
- the fifth sending module 1703 is specifically configured to:
- the first MSG3 is sent on the first time-frequency unit through the LBT manner of listening before speaking.
- the terminal identifier is the international mobile terminal identification code IMSI of the corresponding terminal or a random number.
- the at least two time-frequency units are at least two time-frequency units that are the same in the frequency domain and continuous in the time domain;
- the at least two time-frequency units are at least two time-frequency units that are the same in the frequency domain and are not continuous in the time domain;
- the at least two time-frequency units are at least two time-frequency units that are different in the frequency domain and continuous in the time domain;
- the at least two time-frequency units are at least two time-frequency units that are different in the frequency domain and are not continuous in the time domain.
- the resource indication information is used to indicate the starting time-frequency positions of the at least two time-frequency units.
- the device provided by the above embodiment realizes its function, it is only exemplified by the division of the above functional modules.
- the above functions can be allocated by different functional modules according to actual needs. That is, the content structure of the device is divided into different functional modules to complete all or part of the functions described above.
- An exemplary embodiment of the present disclosure provides a random access device that can implement all or part of the steps performed by a base station in the embodiment shown in FIG. 6 or FIG. 8 of the present disclosure.
- the random access device includes: a processor, A memory for storing processor executable instructions;
- the processor is configured to:
- the RAR contains resource indication information for indicating at least two time-frequency units, and the at least two time-frequency units are time-frequency units on an unlicensed channel Time-frequency units with different domains;
- the first MSG3 Receiving a first random access message three MSG3 sent by the first terminal on a first time-frequency unit, where the first time-frequency unit is any one of the at least two time-frequency units; the first MSG3 Contains the terminal identifier of the first terminal;
- the first MSG4 carries the terminal identity of the first terminal, and the first cell wireless network temporary identity C allocated to the first terminal -RNTI.
- the processor is further configured to:
- the first terminal of the two or more terminals is the terminal that has succeeded in random access this time.
- the processor is configured to:
- the processor is further configured to:
- the second MSG3 includes the first 2. Terminal identification of the terminal;
- the second MSG4 carries the terminal identity of the second terminal, and the second cell wireless network temporary identity C allocated to the second terminal -RNTI; the first C-RNTI is different from the second C-RNTI.
- the terminal identifier is the international mobile terminal identification code IMSI of the corresponding terminal or a random number.
- the at least two time-frequency units are at least two time-frequency units that are the same in the frequency domain and continuous in the time domain;
- the at least two time-frequency units are at least two time-frequency units that are the same in the frequency domain and are not continuous in the time domain;
- the at least two time-frequency units are at least two time-frequency units that are different in the frequency domain and continuous in the time domain;
- the at least two time-frequency units are at least two time-frequency units that are different in the frequency domain and are not continuous in the time domain.
- the resource indication information is used to indicate the starting time-frequency positions of the at least two time-frequency units.
- An exemplary embodiment of the present disclosure provides a random access device that can implement all or part of the steps performed by a terminal in the embodiment shown in FIG. 7 or FIG. 8 of the present disclosure.
- the random access device includes: a processor, A memory for storing processor executable instructions;
- the processor is configured to:
- the processor is configured to:
- the first MSG3 is sent on the first time-frequency unit through the LBT manner of listening before speaking.
- the terminal identifier is the international mobile terminal identification code IMSI of the corresponding terminal or a random number.
- the at least two time-frequency units are at least two time-frequency units that are the same in the frequency domain and continuous in the time domain;
- the at least two time-frequency units are at least two time-frequency units that are the same in the frequency domain and are not continuous in the time domain;
- the at least two time-frequency units are at least two time-frequency units that are different in the frequency domain and continuous in the time domain;
- the at least two time-frequency units are at least two time-frequency units that are different in the frequency domain and are not continuous in the time domain.
- the resource indication information is used to indicate the starting time-frequency positions of the at least two time-frequency units.
- the terminal and the base station include hardware structures and/or software modules corresponding to each function.
- the embodiments of the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is performed by hardware or computer software driven hardware depends on the specific application of the technical solution and design constraints. A person skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the technical solutions of the embodiments of the present disclosure.
- Fig. 18 is a schematic structural diagram showing a random access device according to an exemplary embodiment.
- the apparatus 1800 may be implemented as a terminal or a base station in each of the foregoing embodiments.
- the device 1800 includes a communication unit 1804 and a processor 1802.
- the processor 1802 may also be a controller, which is represented as "controller/processor 1802" in FIG. 18.
- the communication unit 1804 is used to support the terminal to communicate with other network devices (such as base stations, etc.).
- the device 1800 may further include a memory 1803, and the memory 1803 is configured to store program codes and data of the terminal 1800.
- FIG. 18 only shows a simplified design of the device 1800.
- the device 1800 may include any number of processors, controllers, memories, communication units, etc., and all terminals or base stations that can implement the embodiments of the present disclosure are within the protection scope of the embodiments of the present disclosure.
- Computer-readable media includes computer storage media and communication media, where communication media includes any medium that facilitates transfer of a computer program from one place to another.
- the storage medium may be any available medium that can be accessed by a general-purpose or special-purpose computer.
- the embodiment of the present disclosure also provides a computer storage medium for storing computer software instructions used by the above-mentioned terminal or base station, which includes a program designed for executing the above-mentioned random access method.
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Abstract
本公开揭示了一种随机接入方法,属于无线通信技术领域。所述方法包括:接收随机接入前导码;根据接收到的所述随机接入前导码发送RAR,该RAR指示至少两个时频单元,且该至少两个时频单元是非授权信道上时域不同的时频单元;接收第一终端在第一时频单元上发送的第一MSG3,向第一终端发送第一MSG4,第一MSG4中携带第一终端的终端标识,以及为第一终端分配的第一C-RNTI。本公开中基站在不同时间接收到不同终端对同一RAR反馈的MSG3时,可以为不同的终端分配不同的C-RNTI,从而实现基于非授权信道的基于竞争的随机接入。
Description
本公开涉及无线通信技术领域,特别涉及一种随机接入方法、装置及存储介质。
为了应对移动数据日益增长的通信需求,业内提出将蜂窝移动通信技术扩展应用到非授权频段上,即,提出了基于新空口的非授权接入(New Radio Based Unlicensed Access,NR-U)的研究。
在相关技术中,在无线通信***中的NR-U接入技术也需要通过引入先听后说(Listen Before Talk,LBT)机制,使得其可以与其他不同无线接入技术之间可以公平共存。然而,对于如何在LBT机制下,实现基于NR-U的随机接入,目前还没有完善的解决方案。
发明内容
本公开提供一种随机接入方法、装置及存储介质。所述技术方案如下:
根据本公开实施例的第一方面,提供了一种随机接入方法,所述方法由基站执行,所述方法包括:
接收随机接入前导码;
根据接收到的所述随机接入前导码发送随机接入响应RAR,所述RAR中包含用于指示至少两个时频单元的资源指示信息,所述至少两个时频单元是非授权信道上时域不同的时频单元;
接收第一终端在第一时频单元上发送的第一随机接入消息三MSG3,所述第一时频单元是所述至少两个时频单元中的任一时频单元;所述第一MSG3中包含所述第一终端的终端标识;
向所述第一终端发送第一随机接入消息四MSG4,所述第一MSG4中携带有所述第一终端的终端标识,以及为所述第一终端分配的第一小区无线网络临时标识C-RNTI。
可选的,所述向所述第一终端发送第一随机接入消息四MSG4之前,还包 括:
当在所述第一时频单元上解析出两个或两个以上终端分别对所述RAR反馈的MSG3时,确定所述两个或者两个以上终端中的所述第一终端是本次随机接入成功的终端。
可选的,所述接收第一终端在第一时频单元上发送的第一随机接入消息三MSG3,包括:
接收所述第一终端按照先听后说LBT方式,在所述第一时频单元上发送的所述第一MSG3。
可选的,所述方法还包括:
接收第二终端在第二时频单元上发送的第二MSG3,所述第二时频单元是所述至少两个时频单元中的另一时频单元;所述第二MSG3中包含所述第二终端的终端标识;
向所述第二终端发送第二随机接入消息四MSG4,所述第二MSG4中携带有所述第二终端的终端标识,以及为所述第二终端分配的第二小区无线网络临时标识C-RNTI;所述第一C-RNTI与所述第二C-RNTI不同。
可选的,所述终端标识为对应终端的国际移动终端识别码IMSI或为一个随机数。
可选的,所述至少两个时频单元是频域相同,且时域上连续的至少两个时频单元;
或者,
所述至少两个时频单元是频域相同,且时域上不连续的至少两个时频单元;
或者,
所述至少两个时频单元是频域不同,且时域上连续的至少两个时频单元;
或者,
所述至少两个时频单元是频域不同,且时域上不连续的至少两个时频单元。
可选的,所述资源指示信息用于指示所述至少两个时频单元的起始时频位置。
根据本公开实施例的第二方面,提供了一种随机接入方法,所述方法由终 端执行,所述方法包括:
向基站发送随机接入前导码;
接收所述基站发送的随机接入响应RAR,所述RAR中包含用于指示至少两个时频单元的资源指示信息,所述至少两个时频单元是非授权信道上时域不同的时频单元;
在第一时频单元上向所述基站发送第一随机接入消息三MSG3,所述第一时频单元是所述至少两个时频单元中的任一时频单元;所述第一MSG3中包含所述终端的终端标识;
接收所述基站发送的第一随机接入消息四MSG4,所述第一MSG4中携带有所述终端的终端标识,以及所述基站为所述第一终端分配的第一小区无线网络临时标识C-RNTI。
可选的,所述在第一时频单元上向所述基站发送第一随机接入消息三MSG3,包括:
通过先听后说LBT方式,在所述第一时频单元上发送所述第一MSG3。
可选的,所述终端标识为对应终端的国际移动终端识别码IMSI或为一个随机数。
可选的,所述至少两个时频单元是频域相同,且时域上连续的至少两个时频单元;
或者,
所述至少两个时频单元是频域相同,且时域上不连续的至少两个时频单元;
或者,
所述至少两个时频单元是频域不同,且时域上连续的至少两个时频单元;
或者,
所述至少两个时频单元是频域不同,且时域上不连续的至少两个时频单元。
可选的,所述资源指示信息用于指示所述至少两个时频单元的起始时频位置。
根据本公开实施例的第三方面,提供了一种随机接入装置,所述装置用于基站中,所述装置包括:
第一接收模块,用于接收随机接入前导码;
第一发送模块,用于根据接收到的所述随机接入前导码发送随机接入响应RAR,所述RAR中包含用于指示至少两个时频单元的资源指示信息,所述至少两个时频单元是非授权信道上时域不同的时频单元;
第二接收模块,用于接收第一终端在第一时频单元上发送的第一随机接入消息三MSG3,所述第一时频单元是所述至少两个时频单元中的任一时频单元;所述第一MSG3中包含所述第一终端的终端标识;
第二发送模块,用于向所述第一终端发送第一随机接入消息四MSG4,所述第一MSG4中携带有所述第一终端的终端标识,以及为所述第一终端分配的第一小区无线网络临时标识C-RNTI。
可选的,所述装置还包括:
确定模块,用于在所述第二发送模块向所述第一终端发送第一随机接入消息四MSG4之前,当在所述第一时频单元上解析出两个或两个以上终端分别对所述RAR反馈的MSG3时,确定所述两个或者两个以上终端中的所述第一终端是本次随机接入成功的终端。
可选的,所述第二接收模块,具体用于,
接收所述第一终端按照先听后说LBT方式,在所述第一时频单元上发送的所述第一MSG3。
可选的,所述装置还包括:
第三接收模块,用于接收第二终端在第二时频单元上发送的第二MSG3,所述第二时频单元是所述至少两个时频单元中的另一时频单元;所述第二MSG3中包含所述第二终端的终端标识;
第三发送模块,用于向所述第二终端发送第二随机接入消息四MSG4,所述第二MSG4中携带有所述第二终端的终端标识,以及为所述第二终端分配的第二小区无线网络临时标识C-RNTI;所述第一C-RNTI与所述第二C-RNTI不同。
可选的,所述终端标识为对应终端的国际移动终端识别码IMSI或为一个随机数。
可选的,所述至少两个时频单元是频域相同,且时域上连续的至少两个时频单元;
或者,
所述至少两个时频单元是频域相同,且时域上不连续的至少两个时频单元;
或者,
所述至少两个时频单元是频域不同,且时域上连续的至少两个时频单元;
或者,
所述至少两个时频单元是频域不同,且时域上不连续的至少两个时频单元。
可选的,所述资源指示信息用于指示所述至少两个时频单元的起始时频位置。
根据本公开实施例的第四方面,提供了一种随机接入装置,所述装置用于终端中,所述装置包括:
第四发送模块,用于向基站发送随机接入前导码;
第四接收模块,用于接收所述基站发送的随机接入响应RAR,所述RAR中包含用于指示至少两个时频单元的资源指示信息,所述至少两个时频单元是非授权信道上时域不同的时频单元;
第五发送模块,用于在第一时频单元上向所述基站发送第一随机接入消息三MSG3,所述第一时频单元是所述至少两个时频单元中的任一时频单元;所述第一MSG3中包含所述终端的终端标识;
第五接收模块,用于接收所述基站发送的第一随机接入消息四MSG4,所述第一MSG4中携带有所述终端的终端标识,以及所述基站为所述第一终端分配的第一小区无线网络临时标识C-RNTI。
可选的,所述第五发送模块,具体用于,
通过先听后说LBT方式,在所述第一时频单元上发送所述第一MSG3。
可选的,所述终端标识为对应终端的国际移动终端识别码IMSI或为一个随机数。
可选的,所述至少两个时频单元是频域相同,且时域上连续的至少两个时频单元;
或者,
所述至少两个时频单元是频域相同,且时域上不连续的至少两个时频单元;
或者,
所述至少两个时频单元是频域不同,且时域上连续的至少两个时频单元;
或者,
所述至少两个时频单元是频域不同,且时域上不连续的至少两个时频单元。
可选的,所述资源指示信息用于指示所述至少两个时频单元的起始时频位置。
根据本公开实施例的第五方面,提供了一种随机接入装置,其特征在于,所述装置用于基站中,所述装置包括:
处理器;
用于存储所述处理器的可执行指令的存储器;
其中,所述处理器被配置为:
接收随机接入前导码;
根据接收到的所述随机接入前导码发送随机接入响应RAR,所述RAR中包含用于指示至少两个时频单元的资源指示信息,所述至少两个时频单元是非授权信道上时域不同的时频单元;
接收第一终端在第一时频单元上发送的第一随机接入消息三MSG3,所述第一时频单元是所述至少两个时频单元中的任一时频单元;所述第一MSG3中包含所述第一终端的终端标识;
向所述第一终端发送第一随机接入消息四MSG4,所述第一MSG4中携带有所述第一终端的终端标识,以及为所述第一终端分配的第一小区无线网络临时标识C-RNTI。
根据本公开实施例的第六方面,提供了一种随机接入装置,所述装置用于第一终端中,所述装置包括:
处理器;
用于存储所述处理器的可执行指令的存储器;
其中,所述处理器被配置为:
向基站发送随机接入前导码;
接收所述基站发送的随机接入响应RAR,所述RAR中包含用于指示至少 两个时频单元的资源指示信息,所述至少两个时频单元是非授权信道上时域不同的时频单元;
在第一时频单元上向所述基站发送第一随机接入消息三MSG3,所述第一时频单元是所述至少两个时频单元中的任一时频单元;所述第一MSG3中包含所述终端的终端标识;
接收所述基站发送的第一随机接入消息四MSG4,所述第一MSG4中携带有所述终端的终端标识,以及所述基站为所述第一终端分配的第一小区无线网络临时标识C-RNTI。
根据本公开实施例的第七方面,提供了一种计算机可读存储介质,所述计算机可读存储介质中包含可执行指令,基站中的处理器调用所述可执行指令以实现上述第一方面或者第一方面的任一可选实现方式所述的随机接入方法。
根据本公开实施例的第八方面,提供了一种计算机可读存储介质,所述计算机可读存储介质中包含可执行指令,终端中的处理器调用所述可执行指令以实现上述第二方面或者第二方面的任一可选实现方式所述的随机接入方法。
本公开的实施例提供的技术方案可以至少包括以下有益效果:
通过基站接收随机接入前导码;根据接收到的所述随机接入前导码发送随机接入响应RAR,该RAR中包含用于指示至少两个时频单元的资源指示信息,且该至少两个时频单元是非授权信道上时域不同的时频单元;接收第一终端在第一时频单元上发送的第一随机接入消息三MSG3,向第一终端发送第一随机接入消息四MSG4,第一MSG4中携带有第一终端的终端标识,以及为第一终端分配的第一小区无线网络临时标识C-RNTI。相应的,该第一终端可以通过接收该MSG4,直接将其中携带的C-RNTI获取为自己的C-RNTI,从而使得基站可以通过该C-RNTI对第一终端进行正确寻址。也就是说,本公开中基站在不同时间接收到不同终端对同一RAR反馈的MSG3时,可以为不同的终端分配不同的C-RNTI,从而实现基于非授权信道的随机接入,避免了第一终端在LBT机制下,基于NR-U的随机接入过程中与其他终端出现相同C-RNTI的问题。
应当理解的是,以上的一般描述和后文的细节描述仅是示例性的,并不能限制本公开。
此处的附图被并入说明书中并构成本说明书的一部分,示出了符合本公开的实施例,并于说明书一起用于解释本公开的原理。
图1是根据部分示例性实施例示出的一种无线通信***的结构示意图;
图2是本公开实施例提供的一种随机接入流程的示意图;
图3是本公开实施例提供的一种终端由于LBT的失败而导致随机接入失败的示意图;
图4是本公开实施例提供的一种基于多个TxOP的随机接入过程的示意图;
图5是本公开实施例提供的一种随机接入过程的示意图;
图6是本公开实施例提供的一种随机接入方法的方法流程图;
图7是本公开实施例提供的一种随机接入方法的方法流程图;
图8是本公开实施例提供的一种随机接入方法的方法流程图;
图9是本公开实施例涉及的一种至少两个时频单元的示意图;
图10至图13是本公开实施例涉及的一个时频资源内包含3个时频单元的示意图;
图14是本公开实施例涉及的一种终端向基站发送MSG3的示意图;
图15是本公开实施例涉及的一种随机接入流程的示意图;
图16是根据一示例性实施例示出的一种随机接入装置的框图;
图17是根据一示例性实施例示出的一种随机接入装置的框图;
图18是根据一示例性实施例示出的一种随机接入装置的结构示意图。
这里将详细地对示例性实施例进行说明,其示例表示在附图中。下面的描述涉及附图时,除非另有表示,不同附图中的相同数字表示相同或相似的要素。以下示例性实施例中所描述的实施方式并不代表与本公开相一致的所有实施方式。相反,它们仅是与如所附权利要求书中所详述的、本公开的一些方面相一致的装置和方法的例子。
应当理解的是,在本文中提及的“若干个”是指一个或者多个,“多个”是指两个或两个以上。“和/或”,描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B这三种情况。字符“/”一般表示前后关联对象是一种“或”的关系。
无线电频谱资源是一种有限、不可再生的自然资源,因此各国对于无线电频谱有专门的管理机构,出台专门的政策法规,以实现无线电频谱的统一规划管理。目前各国的频谱管理大多数采用固定频谱分配策略,即频谱资源由政府主管部门管理并分配给固定的授权用户,这样能够确保各用户之间避免过多相互干扰,更好利用频谱资源。目前频谱资源可分为两类,即授权频谱(Licensed Spectrum)和非授权频谱(Unlicensed Spectrum)。
授权频谱受到严格的限制和保护,只允许授权用户及其符合规范的设备接入,并且用户通常要为此进行付费。目前,公安、铁路、民航、广电、电信等重要的部门均拥有一定的授权频谱,这些部门内设备的通信是运行在其授权频谱上的,尤其是电信行业,我们每天使用的手机就是通过运营商拥有的授权频谱来通信的,各大运营商都拥有各自国家的无线电管理单位或部门授权的专用频段,以保障公众移动通信不受干扰。
而非授权频谱是满足一定规范和标准的设备都可以接入和使用的频谱,但必须保证不对其他用户造成干扰。比较典型的,无线保真(Wireless Fidelity,Wi-Fi)、蓝牙(Bluetooth,BT)等通信技术就是通过非授权频谱进行传输的。此外,国际通信联盟无线电通信局曾经定义过工业科学医疗(Industrial Scientific Medical,ISM)频段,主要是开放给工业、科学、医学这三类机构使用,无需授权许可,当然也需要遵守一定的发射功率,并且不能对其它频段造成干扰。
随着移动数据日益增长的通信需求,业内开展了将蜂窝移动通信技术扩展到非授权频段的研究。比如,为了将第五代移动通信技术(Fifth-generation,5G)技术,也称新空口(new radio,NR)技术扩展到非授权频段上,第三代合作伙伴计划(3rd Generation Partnership Project,3GPP)组织通过了5G研究项目“Study on NR-based Access to Unlicensed Spectrum”(基于NR的非授权频谱接入研究),简称NR-U,旨在通过该项目的研究使NR能够满足非授权频段的法规要求,并且能够保证与工作在非授权频段上的其他接入技术和平共处。
本公开实施例提供一种基于NR-U研究的随机接入方案,可以用于无线通信***中,实现终端与基站的连接。
请参考图1,图1是根据部分示例性实施例示出的一种无线通信***的结构示意图,如图1所示,移动通信***是基于蜂窝移动通信技术的通信***,该移动通信***可以包括:若干个终端110以及若干个基站120。
其中,终端110可以是指向用户提供语音和/或数据连通性的设备。终端110可以经无线接入网(Radio Access Network,RAN)与一个或多个核心网进行通信,终端110可以是物联网终端,如传感器设备、移动电话(或称为“蜂窝”电话)和具有物联网终端的计算机,例如,可以是固定式、便携式、袖珍式、手持式、计算机内置的或者车载的装置。例如,站(Station,STA)、订户单元(subscriber unit)、订户站(subscriber station),移动站(mobile station)、移动台(mobile)、远程站(remote station)、接入点、远程终端(remote terminal)、接入终端(access terminal)、用户装置(user terminal)、用户代理(user agent)、用户设备(user device)、或用户终端(user equipment,UE)。或者,终端110也可以是无人飞行器的设备。
基站120可以是无线通信***中的网络侧设备。其中,该无线通信***可以是***移动通信技术(the 4th generation mobile communication,4G)***,又称长期演进(Long Term Evolution,LTE)***;或者,该无线通信***也可以是5G***,又称新空口(new radio,NR)***。或者,该无线通信***也可以是5G***的再下一代***。
其中,基站120可以是4G***中采用的演进型基站(eNB)。或者,基站120也可以是5G***中采用集中分布式架构的基站(gNB)。当基站120采用集中分布式架构时,通常包括集中单元(central unit,CU)和至少两个分布单元(distributed unit,DU)。集中单元中设置有分组数据汇聚协议(Packet Data Convergence Protocol,PDCP)层、无线链路层控制协议(Radio Link Control,RLC)层、媒体访问控制(Media Access Control,MAC)层的协议栈;分布单元中设置有物理(Physical,PHY)层协议栈,本公开实施例对基站120的具体实现方式不加以限定。
基站120和终端110之间可以通过无线空口建立无线连接。在不同的实施方式中,该无线空口是基于***移动通信网络技术(4G)标准的无线空口; 或者,该无线空口是基于第五代移动通信网络技术(5G)标准的无线空口,比如该无线空口是新空口;或者,该无线空口也可以是基于5G的更下一代移动通信网络技术标准的无线空口。
可选的,上述无线通信***还可以包含网络管理设备130。
若干个基站120分别与网络管理设备130相连。其中,网络管理设备130可以是无线通信***中的核心网设备,比如,该网络管理设备130可以是演进的数据分组核心网(Evolved Packet Core,EPC)中的移动性管理实体(Mobility Management Entity,MME)。或者,该网络管理设备也可以是其它的核心网设备,比如服务网关(Serving GateWay,SGW)、公用数据网网关(Public Data Network GateWay,PGW)、策略与计费规则功能单元(Policy and Charging Rules Function,PCRF)或者归属签约用户服务器(Home Subscriber Server,HSS)等。对于网络管理设备130的实现形态,本公开实施例不做限定。
在一种可能实现的方式中,上述无线通信***中的终端和基站可以具有基于蜂窝移动通信技术使用非授权频段的能力(比如NR-U能力),相应的,具有基于蜂窝移动通信技术使用非授权频段的能力的终端可以在非授权频段上对具有同样能力的基站发起随机接入请求,请参考图2,其示出了本公开实施例提供的一种随机接入流程示意图。如图2所示,
在步骤201中,终端从前导码资源池中随机选择一个前导码发送给基站,包含前导码的消息也称为随机接入消息一(MSG1)。基站对接收信号进行相关性检测,从而识别出用户所发送的前导码。
在步骤202中,基站向终端发送随机接入响应(Random Access Response,RAR),该RAR也称为随机接入消息二(MSG2),该RAR包含随机接入前导码标识符、根据终端与基站间时延估计所确定的定时提前指令、临时小区无线网络临时标识(Temporary Cell-Radio Network Temporary Identifier,TC-RNTI),以及为终端下次上行传输所分配的时频资源等信息。
在步骤203中,终端根据RAR中的信息,向基站发送随机接入消息三(Message 3,MSG3)。MSG3中包含终端标识以及无线资源控制(Radio Resource Control,RRC)链接请求等信息,其中,该终端标识可以是终端唯一对应的标识。比如,当该终端是处于空闲态(IDLE状态)的终端时,该终端标识可以是该终端的国际移动终端识别码(International Mobile Subscriber Identification Number,IMSI);当该终端是处于连接态(CONNECTED状态)时,该终端标 识可以是该终端已经被分配的小区无线网络临时标识(Cell-Radio Network Temporary Identifier,C-RNTI)。
在步骤204中,基站向终端发送冲突解决标识(也称为MSG4),包含了冲突解决中胜出的终端标识。终端在检测出自己的标识后,若该终端是处于空闲态(Idle态)的终端,则将TC-RNTI升级为C-RNTI,并向基站发送确认字符(Acknowledgement,ACK)信号,完成随机接入过程,并等待基站的调度。
目前,相关技术中,在上述NR-U的随机接入研究中,由于引入了LBT机制,基于竞争的随机接入过程会由于终端的LBT的失败而导致终端在接收基站的RAR中分配好的用于MSG3的上行资源上无法竞争到上行资源,从而导致该终端在NR-U的随机接入失败的情况。请参考图3,其示出了本公开实施例提供的一种终端由于LBT的失败而导致随机接入失败的示意图。如图3所示,终端在初始随机接入时向基站发送MSG1,基站收到终端发送的MSG1后对其作出响应并发送MSG2以分配上行资源等,终端可以在发送MSG3之前进行LBT时,若检测到信道处于繁忙状态(如图3中信道忙所示),则会使该终端无法在分配好的上行资源上发送MSG3从而导致该终端随机接入的失败(如图3中虚线所示)。
目前有一种在NR-U中的随机接入时间窗口内为一个或多个消息的传输(例如,MSG1,MSG2,MSG3,MSG4)提供多个传输机会(Transmission Opportunity,TxOP)的方案。请参考图4,其示出了本公开实施例提供的一种基于多个TxOP的随机接入过程的示意图。如图4所示,其中包含了时间窗口401。终端仍然可以在初始随机接入时向基站发送MSG1,基站收到终端发送的MSG1后对其作出响应并发送MSG2以分配上行资源等,该上行资源可以拥有多个TxOP,即该时间窗口401中可以包含多个时频单元,该终端可以在时间窗口401内进行LBT时,检测到上行资源在空闲状态下的时频单元,该终端可以通过该空闲状态下的时频单元上向基站发送MSG3,从而使得该终端在监测到时频单元状态为“信道忙”的状态之后,仍然可以检测到其他空闲的时频单元,延续后续随机接入步骤的进行,避免了终端因一次LBT失败,从而导致该终端的随机接入的失败的情况。
但是,对于上述提出的方案,对于多个终端在同一时频资源上发送相同的MSG1,由于引入了多个MSG3的TxOP,可能会造成上述多个终端在分配好的不同时频单元上发送的MSG3是响应同一MSG2的,在这种情况下,基站 可以在不同的时间上接收到多个终端的MSG3并在不同时间的发送MSG4,当各个终端检测到自身所发送的MSG3与接收到的MSG4的终端标识相匹配时宣布自身随机接入成功。如果此时多个终端均处于IDLE状态,则会将同一MSG2中指示的TC-RNTI升级为各自的C-RNTI,导致多个终端具有相同的C-RNTI。
比如,请参考图5,其示出了本公开实施例提供的一种随机接入过程的示意图。如图5所示,其中包含了两个处于空闲状态终端UE1和终端UE2,以及可以接入的基站gNB。第一时频单元起始时刻t1,第二时频单元t2。其中,UE1和UE2可以在初始接入时在同一时频资源上发送相同的MSG1,当gNB接收到相同的MSG1时,可以下发同一个MSG2,此时UE1和UE2也可以得到相同的TC-RNTI,并根据各自的LBT结果分别对应的时频资源上发送MSG3,即如图5所示的,UE1在t1时刻发送MSG3,UE2在t2时刻发送MSG3。由于UE1和UE2发送MSG3的时间是错开的,gNB可以分别在不同的时刻接收到UE1和UE2发送的MSG3,并分别发送对应的MSG4,UE1和UE2分别将所接收到的MSG4中携带的终端标识与自身所发送的MSG3中携带的终端标识进行比较,当终端标识相匹配时,对应的终端宣布随机接入成功,并分别将从MSG2中获取到的TC-RNTI升级为自身的C-RNTI。对于图5所示的UE1和UE2,由于两者具有相同的TC-RNTI,在将其升级为自身C-RNTI时会出现不同终端具有相同C-RNTI的问题,导致了基站无法利用C-RNTI来进行正确寻址的问题。
为了解决上述方案存在的问题,本公开提供了一种随机接入的方法,请参考图6,其示出了本公开实施例提供的一种随机接入方法的方法流程图,该方法可以用于上述图1所示的无线通信***中,终端与基站的NR-U的随机接入过程,可以由无线通信***中支持NR-U能力的基站执行,如图6所示,该方法可以包括以下步骤:
在步骤601中,接收随机接入前导码;
在步骤602中,根据接收到的随机接入前导码发送随机接入响应RAR,RAR中包含用于指示至少两个时频单元的资源指示信息,至少两个时频单元是非授权信道上时域不同的时频单元;
在步骤603中,接收第一终端在第一时频单元上发送的第一随机接入消息 三MSG3,第一时频单元是至少两个时频单元中的任一时频单元;第一MSG3中包含第一终端的终端标识;
在步骤604中,向第一终端发送第一随机接入消息四MSG4,第一MSG4中携带有第一终端的终端标识,以及为第一终端分配的第一小区无线网络临时标识C-RNTI。
可选的,上述向该第一终端发送第一随机接入消息四MSG4之前,还包括:
当在该第一时频单元上解析出两个或两个以上终端分别对该RAR反馈的MSG3时,确定该两个或者两个以上终端中的该第一终端是本次随机接入成功的终端。
可选的,该接收第一终端在第一时频单元上发送的第一随机接入消息三MSG3,包括:
接收该第一终端按照先听后说LBT方式,在该第一时频单元上发送的该第一MSG3。
可选的,该方法还包括:
接收第二终端在第二时频单元上发送的第二MSG3,该第二时频单元是该至少两个时频单元中的另一时频单元;该第二MSG3中包含该第二终端的终端标识;
向该第二终端发送第二随机接入消息四MSG4,该第二MSG4中携带有该第二终端的终端标识,以及为该第二终端分配的第二小区无线网络临时标识C-RNTI;该第一C-RNTI与该第二C-RNTI不同。
可选的,该终端标识为对应终端的国际移动终端识别码IMSI或为一个随机数。
可选的,该至少两个时频单元是频域相同,且时域上连续的至少两个时频单元;
或者,
该至少两个时频单元是频域相同,且时域上不连续的至少两个时频单元;
或者,
该至少两个时频单元是频域不同,且时域上连续的至少两个时频单元;
或者,
该至少两个时频单元是频域不同,且时域上不连续的至少两个时频单元。
可选的,该资源指示信息用于指示该至少两个时频单元的起始时频位置。
综上所述,通过基站接收随机接入前导码;根据接收到的所述随机接入前导码发送随机接入响应RAR,该RAR中包含用于指示至少两个时频单元的资源指示信息,且该至少两个时频单元是非授权信道上时域不同的时频单元;接收第一终端在第一时频单元上发送的第一随机接入消息三MSG3,向第一终端发送第一随机接入消息四MSG4,第一MSG4中携带有第一终端的终端标识,以及为第一终端分配的第一小区无线网络临时标识C-RNTI。相应的,该第一终端可以通过接收该MSG4,直接将其中携带的C-RNTI获取为自己的C-RNTI,从而使得基站可以通过该C-RNTI对第一终端进行正确寻址。也就是说,本公开中基站在不同时间接收到不同终端对同一RAR反馈的MSG3时,可以为不同的终端分配不同的C-RNTI,从而实现基于非授权信道的基于竞争的随机接入,避免了第一终端在LBT机制下,基于NR-U的基于竞争的随机接入过程中与其他终端出现相同C-RNTI的问题。
请参考图7,其示出了本公开实施例提供的一种随机接入方法的方法流程图,该方法可以用于上述图1所示的无线通信***中,终端与基站的NR-U的随机接入过程,可以由无线通信***中支持NR-U能力的终端执行,如图7所示,该方法可以包括以下步骤:
在步骤701中,向基站发送随机接入前导码;
在步骤702中,接收基站发送的随机接入响应RAR,RAR中包含用于指示至少两个时频单元的资源指示信息,至少两个时频单元是非授权信道上时域不同的时频单元;
在步骤703中,在第一时频单元上向基站发送第一随机接入消息三MSG3,第一时频单元是至少两个时频单元中的任一时频单元;第一MSG3中包含终端的终端标识;
在步骤704中,接收基站发送的第一随机接入消息四MSG4,第一MSG4中携带有终端的终端标识,以及基站为第一终端分配的第一小区无线网络临时标识C-RNTI。
可选的,上述在第一时频单元上向该基站发送第一随机接入消息三MSG3,包括:
通过先听后说LBT方式,在该第一时频单元上发送该第一MSG3。
可选的,该终端标识为对应终端的国际移动终端识别码IMSI或为一个随 机数。
可选的,该至少两个时频单元是频域相同,且时域上连续的至少两个时频单元;
或者,
该至少两个时频单元是频域相同,且时域上不连续的至少两个时频单元;
或者,
该至少两个时频单元是频域不同,且时域上连续的至少两个时频单元;
或者,
该至少两个时频单元是频域不同,且时域上不连续的至少两个时频单元。
可选的,该资源指示信息用于指示该至少两个时频单元的起始时频位置。
综上所述,通过基站接收随机接入前导码;根据接收到的所述随机接入前导码发送随机接入响应RAR,该RAR中包含用于指示至少两个时频单元的资源指示信息,且该至少两个时频单元是非授权信道上时域不同的时频单元;接收第一终端在第一时频单元上发送的第一随机接入消息三MSG3,向第一终端发送第一随机接入消息四MSG4,第一MSG4中携带有第一终端的终端标识,以及为第一终端分配的第一小区无线网络临时标识C-RNTI。相应的,该第一终端可以通过接收该MSG4,直接将其中携带的C-RNTI获取为自己的C-RNTI,从而使得基站可以通过该C-RNTI对第一终端进行正确寻址。也就是说,本公开中基站在不同时间接收到不同终端对同一RAR反馈的MSG3时,可以为不同的终端分配不同的C-RNTI,从而实现基于非授权信道的基于竞争的随机接入,避免了第一终端在LBT机制下,基于NR-U的基于竞争的随机接入过程中与其他终端出现相同C-RNTI的问题。
在一种可能实现的方式中,图1所示的无线通信***中,支持NR-U能力的基站可以通过单播无线资源控制RRC信令广播***消息,相应的支持NR-U能力的终端可以接收到基站广播的***消息,需要接入基站的终端可以根据该***消息中携带的信息,生成进行基于竞争的随机接入的MSG1,将该MSG1发送给基站,开始接入基站的流程。
请参考图8,其示出了本公开实施例提供的一种随机接入方法的方法流程图,如图8所示,该随机接入方法可以应用于图1所示的无线通信***中,该方法可以包括以下步骤:
在步骤801中,终端向基站发送随机接入前导码。
相应的,基站接收该终端发送的随机接入前导码。
在一种可能实现的方式中,终端可以对获取的***消息中的主信息模块MIB或者***信息块SIB中携带的Preamble信息以及随机接入需要的物理随机接入信道(Physical Random Access Channel,PRACH),包括PRACH的个数和时频位置等。终端可以解析出其中的Preamble信息并配置到MAC,由MAC根据路损等信息在Preamble集合中随机选择一个Preamble索引配置给物理层,物理层根据MAC的Preamble索引,通过查表/公式生成有效的随机接入前导码并发送到基站,基站可以在相应的PRACH信道资源上接收该终端发送的随机接入前导码。
可选的,上述PRACH信道资源可以包括非授权信道上的信道资源,也就是说,在本公开实施例中,当终端具有基于蜂窝移动通信技术使用非授权频段的能力时,可以在非授权频段对应的时频资源上发送随机接入前导码。
可选的,在PRACH信道资源上可以有多个终端在同一时频资源上向基站发送相同的随机接入前导码,此时基站相应的也可以接收到多个终端发送的随机接入前导码。
在步骤802中,基站根据接收到的随机接入前导码发送随机接入响应RAR。
相应的,终端接收由基站发送的随机接入响应RAR。其中,该RAR中包含用于指示至少两个时频单元的资源指示信息,该至少两个时频单元是非授权信道上时域不同的时频单元。
可选的,在本公开实施例中,当基站在非授权频段上接收到随机接入前导码时,基站也可以在非授权频段对应的时频资源上发送该随机接入前导码对应的RAR。
可选的,基站可以在PRACH中盲检测终端发送的随机接入前导码,如果基站检测到了终端发送的随机接入前导码,基站也可以上报给MAC,由MAC产生与基站接收到的随机接入前导码相对应的随机接入响应RAR,基站后续可以在响应终端随机接入的时频资源内,将该随机接入响应RAR通过物理下行共享信道(Physical Downlink Shared Channel,PDSCH)反馈给终端。可选的,基站在发送RAR的过程中,可以使用随机接入无线网络临时标识(Random Access-Radio Network Temporary Identity,RA-RNTI)对PDSCH对应的物理下 行控制信道(Physical Downlink Controled Channel,PDCCH)进行加扰。RA-RNTI与基站检测到的前导码所发送占用的时频资源一一对应。在这种情况下,终端也可以计算出相应的RA-RNTI,并使用该RA-RNTI解扰PDCCH,从而进一步解码PDSCH的信道内容。
可选的,该RAR中可以携带TC-RNTI用于后续随机接入过程中终端对TC-RNTI进行升级,获取为C-RNTI。不过,本公开的RAR中并不一定需要使用C-RNTI进行加扰,即,基站可以使用TC-RNTI对RAR进行加扰,也可以不使用TC-RNTI对RAR进行加扰,终端的C-RNTI的分配可以由后续随机接入的步骤完成。
在一种可能实现的方式中,基站通过PDSCH反馈给终端的RAR中可以包含用于指示非授权信道上的至少两个时频单元的资源指示信息,以便于终端在非授权信道上,通过LBT方式选择合适的时频单元发送后续用于随机接入的MSG3。
可选的,该资源指示信息可以用于指示该至少两个时频单元的起始时频位置。
比如,请参考图9,其示出了本公开实施例涉及的一种至少两个时频单元的示意图。如图9所示,在一个时频资源内,可以包含多个时频单元,且各个时频单元的起始时频位置可以由资源指示信息指示。终端可以通过相应的解析,得到RAR中包含的这些信息,并在相应的起始时频位置发送相应的MSG3。可选的,以一个时频资源内包含3个时频单元为例,在一种可能实现的方式中,该至少两个时频单元可以是频域相同,且时域上连续的至少两个时频单元;或者,该至少两个时频单元可以是频域相同,且时域上不连续的至少两个时频单元;或者,该至少两个时频单元可以是频域不同,且时域上连续的至少两个时频单元;或者,该至少两个时频单元可以是频域不同,且时域上不连续的至少两个时频单元。请参考图10至图13,其示出了本公开实施例涉及的一个时频资源内包含3个时频单元的示意图。如图10至图13所示,可以看出RAR中指示终端发送MSG3的时频资源包含的时频单元的形式可以是上述中的至少一种。
在一种可能实现的方式中,上述RAR可以是基站盲检测到多个终端发送的随机接入前导码发送的,即,该RAR可以是响应于在同一时频资源上多个终端发送的相同的随机接入前导码,此时多个终端相应的也可以接收到同一个 RAR。
在步骤803中,第一终端在第一时频单元上向基站发送第一随机接入消息三MSG3。
相应的,基站在对应的第一时频单元上接收第一终端发送的第一随机接入消息MSG3。
可选的,该第一终端可以是接收到基站反馈的RAR终端中的任意一个终端。该第一时频单元可以是上述至少两个时频单元中的任一时频单元。可选的,该第一终端可以对接收到的RAR进行解析,得到该RAR中包含的时频资源,该第一终端便可以在相应的时频资源上发送第一MSG3。可选的,该第一终端可以通过LBT监测方式,监测到其中包含的至少两个时频单元中有空闲的时频单元时,可以在相应的空闲的时频单元上发送第一MSG3。
可选的,第一终端在发送第一MSG3时,该第一终端可以是处于连接状态或者空闲状态,处于连接状态的第一终端发送的第一MSG3中便可以携带有自身的C-RNTI,基站根据解析得到的CRNTI对第一终端进行寻址,为第一终端发送MSG4。对于处于空闲状态的第一终端,该第一终端发送的第一MSG3中不包含C-RNTI,此时基站可以为该第一终端分配一个未被其他终端使用的CRNTI,将该CRNTI携带在MSG4中,下发给第一终端。
在一种可能实现的方式中,第一终端可以通过解析得到上述RAR中包含的至少两个时频单元的资源指示信息,在该资源指示信息指示的起始时频位置之前的预设时间内,通过LBT监测相应的时频单元是否空闲,如果监测到的第一个到来的时频单元是繁忙的,则可以继续在下一个时频单元的起始时频位置之前的预设时间内监听相应的时频单元是否空闲,在监听到空闲的时频单元时,该第一终端可以相应的空闲的时频单元上发送第一MSG3。其中,该预设时间可以是由开发人员或者运维人员预先在终端中设置。
可选的,该第一MSG3中可以包含该第一终端的终端标识,可选的,该第一终端的终端标识为该第一终端对应的国际移动终端识别码IMSI或为一个随机数。
在一种可能实现的方式中,由于各个终端LBT方式以及距离基站的远近问题,可以使两个或者两个以上终端通过LBT方式监听得到的第一时频单元都为空闲状态,相应的,这些终端都可以在第一时频单元上发送MSG3,使得在第一时频单元上向基站发送的MSG3的终端是两个或者两个以上。请参考图 14,其示出了本公开实施例涉及的一种终端向基站发送MSG3的示意图。如图14所示,在第一时频单元上有两个或者两个以上终端响应基站反馈的同一个RAR(即图中的MSG2),并向基站发送MSG3,此时,当基站在第一时频单元上解析出两个或者两个以上终端分别对上述RAR反馈的MSG3时,基站可以先通过确定该两个或者两个以上终端中的第一终端为本次随机接入成功的终端,最终可以只发送第一终端对应的MSG4。可选的,该第一终端的确定可以与基于LTE竞争随机接入的竞争解决类似,此处不再赘述。
在一种可能实现的方式中,基站可以在第二时频单元上接收第二终端发送的第二MSG3,可选的,基站也可以在对应的第二时频单元上接收第二终端发送的第二随机接入消息MSG3。该第二时频单元是上述至少两个时频单元中不同于第一时频单元的另一时频单元。该第二终端在第二时频单元上发送第二MSG3的原理与第一终端在第一时频单元上发送第一MSG3的原理类似,此处不再赘述。可选的,该第二MSG3中可以包含该第二终端的终端标识,且该第二终端的终端标识可以为第二终端对应的IMSI或为一个随机数。需要说明的是,该第一终端和第二终端是步骤801中向基站在同一时频资源上发送相同的随机接入前导码的不同终端。
在步骤804中,基站向第一终端发送第一随机接入消息四MSG4。
相应的,第一终端接收基站发送的第一随机接入消息MSG4。
其中,该第一MSG4中携带第一终端的终端标识,以及基站为终端分配的第一小区无线网络临时标识C-RNTI。
可选的,基站可以在与上述第一时频单元相对应的时频资源位置上发送该第一MSG4,从而向第一终端发送相应的第一MSG4,该第一MSG4中携带的第一终端的终端标识可以是基站对第一终端发送的MSG3解析得到的,对于连接状态的终端,由于其发送的MSG3中携带有已有的C-RNTI,基站可以解析得到该第一终端的C-RNTI,将该C-RNTI携带在MSG4中,发送给第一终端。对于空闲状态的终端,该基站可以对该第一终端分配一个未被其他终端使用的C-RNTI,将这两个信息(第一终端的IMSI,以及为第一终端分配的C-RNTI)携带在MSG4中,发送给第一终端。
在一种可能实现的方式中,基站在解析处于空闲状态的第一终端在第一时频单元上发送的第一MSG3时,可以解析出第一终端发送的第一MSG3是针对哪一个RAR发送的,并且对第一终端选择一个C-RNTI,将MSG4发送给该 空闲状态的第一终端。可选的,第一终端根据接收到的MSG4中携带的终端标识以及基站分配的C-RNTI,当MSG4中携带的终端标识与自己的中带标识相同时,便可以宣布随机接入成功,并将该基站分配的C-RNTI作为与自己在基站中的身份标识,使得基站可以通过相应的C-RNTI寻址到自己。
对应上述一种可能实现的方式中,基站也可以对处于空闲状态的第二终端进行分配一个未被其他终端使用的C-RNTI,并对第二终端发送第二随机接入消息MSG4,相应的,第二终端也可以接收基站发送的MSG4,将其中携带的C-RNTI获取为自己在基站中的身份标识。其中,基站为第二终端分配的C-RNTI是与为第一终端分配的C-RNTI是不同的。
在一种可能实现的方式中,以MSG4中携带的终端标识为IMSI为例,请参考图15,其示出了本公开实施例涉及的一种随机接入流程的示意图。如图15所示,其中包含了两个空闲状态的终端UE1和终端UE2,一个可以接入的基站gNB,UE1和UE2在同一时频资源上发送相同的随机接入前导码,基站gNB在同一时刻接收到两个相同的随机接入前导码,并响应同一个RAR(即图中的MSG2),将该RAR通过***消息广播出去,相应的,UE1和UE2均可以接收到该RAR,并在各自通过LBT方式监听得到的时频单元上发送相应的MSG3,基站在不同时刻接收到反馈同一个RAR的两个MSG3,该基站可以对这两个MSG3分别发送对应的MSG4,该MSG4中除了携带对应终端(UE1和UE2)的IMSI,还携带了基站为对应终端分配的C-RNTI,UE1和UE2接收到相应的MSG4之后,可以将对应的MSG4中携带的C-RNTI作为自己在gNB的身份识别信息,进一步宣布自己随机接入成功。可选的,MSG4中携带的终端标识为一个随机数时的随机接入原理与携带的终端标识为IMSI时的类似,此处不再赘述。
综上所述,通过基站接收随机接入前导码;根据接收到的所述随机接入前导码发送随机接入响应RAR,该RAR中包含用于指示至少两个时频单元的资源指示信息,且该至少两个时频单元是非授权信道上时域不同的时频单元;接收第一终端在第一时频单元上发送的第一随机接入消息三MSG3,向第一终端发送第一随机接入消息四MSG4,第一MSG4中携带有第一终端的终端标识,以及为第一终端分配的第一小区无线网络临时标识C-RNTI。相应的,该第一终端可以通过接收该MSG4,直接将其中携带的C-RNTI获取为自己的C-RNTI,从而使得基站可以通过该C-RNTI对第一终端进行正确寻址。也就是 说,本公开中基站在不同时间接收到不同终端对同一RAR反馈的MSG3时,可以为不同的终端分配不同的C-RNTI,从而实现基于非授权信道的基于竞争的随机接入,避免了第一终端在LBT机制下,基于NR-U的基于竞争的随机接入过程中与其他终端出现相同C-RNTI的问题。
下述为本公开装置实施例,可以用于执行本公开方法实施例。对于本公开装置实施例中未披露的细节,请参照本公开方法实施例。
图16是根据一示例性实施例示出的一种随机接入装置的框图,如图16所示,该随机接入装置可以通过硬件或者软硬结合的方式实现为图1所示实施环境中的基站的全部或者部分,以执行图6或者图8任一所示实施例中由基站执行的步骤。该随机接入装置可以包括:
第一接收模块1601,用于接收随机接入前导码;
第一发送模块1602,用于根据接收到的所述随机接入前导码发送随机接入响应RAR,所述RAR中包含用于指示至少两个时频单元的资源指示信息,所述至少两个时频单元是非授权信道上时域不同的时频单元;
第二接收模块1603,用于接收第一终端在第一时频单元上发送的第一随机接入消息三MSG3,所述第一时频单元是所述至少两个时频单元中的任一时频单元;所述第一MSG3中包含所述第一终端的终端标识;
第二发送模块1604,用于向所述第一终端发送第一随机接入消息四MSG4,所述第一MSG4中携带有所述第一终端的终端标识,以及为所述第一终端分配的第一小区无线网络临时标识C-RNTI。
可选的,所述装置还包括:
确定模块,用于在所述第二发送模块向所述第一终端发送第一随机接入消息四MSG4之前,当在所述第一时频单元上解析出两个或两个以上终端分别对所述RAR反馈的MSG3时,确定所述两个或者两个以上终端中的所述第一终端是本次随机接入成功的终端。
可选的,所述第二接收模块1603,具体用于,
接收所述第一终端按照先听后说LBT方式,在所述第一时频单元上发送的所述第一MSG3。
可选的,所述装置还包括:
第三接收模块,用于接收第二终端在第二时频单元上发送的第二MSG3, 所述第二时频单元是所述至少两个时频单元中的另一时频单元;所述第二MSG3中包含所述第二终端的终端标识;
第三发送模块,用于向所述第二终端发送第二随机接入消息四MSG4,所述第二MSG4中携带有所述第二终端的终端标识,以及为所述第二终端分配的第二小区无线网络临时标识C-RNTI;所述第一C-RNTI与所述第二C-RNTI不同。
可选的,所述终端标识为对应终端的国际移动终端识别码IMSI或为一个随机数。
可选的,所述至少两个时频单元是频域相同,且时域上连续的至少两个时频单元;
或者,
所述至少两个时频单元是频域相同,且时域上不连续的至少两个时频单元;
或者,
所述至少两个时频单元是频域不同,且时域上连续的至少两个时频单元;
或者,
所述至少两个时频单元是频域不同,且时域上不连续的至少两个时频单元。
可选的,所述资源指示信息用于指示所述至少两个时频单元的起始时频位置。
图17是根据一示例性实施例示出的一种随机接入装置的框图,如图17所示,该随机接入装置可以通过硬件或者软硬结合的方式实现为图1所示实施环境中的终端的全部或者部分,以执行图7或者图8任一所示实施例中由终端执行的步骤。该随机接入装置可以包括:
第四发送模块1701,用于向基站发送随机接入前导码;
第四接收模块1702,用于接收所述基站发送的随机接入响应RAR,所述RAR中包含用于指示至少两个时频单元的资源指示信息,所述至少两个时频单元是非授权信道上时域不同的时频单元;
第五发送模块1703,用于在第一时频单元上向所述基站发送第一随机接入消息三MSG3,所述第一时频单元是所述至少两个时频单元中的任一时频单元; 所述第一MSG3中包含所述终端的终端标识;
第五接收模块1704,用于接收所述基站发送的第一随机接入消息四MSG4,所述第一MSG4中携带有所述终端的终端标识,以及所述基站为所述第一终端分配的第一小区无线网络临时标识C-RNTI。
可选的,所述第五发送模块1703,具体用于,
通过先听后说LBT方式,在所述第一时频单元上发送所述第一MSG3。
可选的,所述终端标识为对应终端的国际移动终端识别码IMSI或为一个随机数。
可选的,所述至少两个时频单元是频域相同,且时域上连续的至少两个时频单元;
或者,
所述至少两个时频单元是频域相同,且时域上不连续的至少两个时频单元;
或者,
所述至少两个时频单元是频域不同,且时域上连续的至少两个时频单元;
或者,
所述至少两个时频单元是频域不同,且时域上不连续的至少两个时频单元。
可选的,所述资源指示信息用于指示所述至少两个时频单元的起始时频位置。
需要说明的一点是,上述实施例提供的装置在实现其功能时,仅以上述各个功能模块的划分进行举例说明,实际应用中,可以根据实际需要而将上述功能分配由不同的功能模块完成,即将设备的内容结构划分成不同的功能模块,以完成以上描述的全部或者部分功能。
关于上述实施例中的装置,其中各个模块执行操作的具体方式已经在有关该方法的实施例中进行了详细描述,此处将不做详细阐述说明。
本公开一示例性实施例提供了一种随机接入装置,能够实现本公开上述图6或者图8所示实施例中由基站执行的全部或者部分步骤,该随机接入装置包括:处理器、用于存储处理器可执行指令的存储器;
其中,所述处理器被配置为:
接收随机接入前导码;
根据接收到的所述随机接入前导码发送随机接入响应RAR,所述RAR中包含用于指示至少两个时频单元的资源指示信息,所述至少两个时频单元是非授权信道上时域不同的时频单元;
接收第一终端在第一时频单元上发送的第一随机接入消息三MSG3,所述第一时频单元是所述至少两个时频单元中的任一时频单元;所述第一MSG3中包含所述第一终端的终端标识;
向所述第一终端发送第一随机接入消息四MSG4,所述第一MSG4中携带有所述第一终端的终端标识,以及为所述第一终端分配的第一小区无线网络临时标识C-RNTI。
可选的,所述处理器还被配置为:
在上述向所述第一终端发送第一随机接入消息四MSG4之前,当在所述第一时频单元上解析出两个或两个以上终端分别对所述RAR反馈的MSG3时,确定所述两个或者两个以上终端中的所述第一终端是本次随机接入成功的终端。
可选的,所述处理器被配置为:
接收所述第一终端按照先听后说LBT方式,在所述第一时频单元上发送的所述第一MSG3。
可选的,所述处理器还被配置为:
接收第二终端在第二时频单元上发送的第二MSG3,所述第二时频单元是所述至少两个时频单元中的另一时频单元;所述第二MSG3中包含所述第二终端的终端标识;
向所述第二终端发送第二随机接入消息四MSG4,所述第二MSG4中携带有所述第二终端的终端标识,以及为所述第二终端分配的第二小区无线网络临时标识C-RNTI;所述第一C-RNTI与所述第二C-RNTI不同。
可选的,所述终端标识为对应终端的国际移动终端识别码IMSI或为一个随机数。
可选的,所述至少两个时频单元是频域相同,且时域上连续的至少两个时频单元;
或者,
所述至少两个时频单元是频域相同,且时域上不连续的至少两个时频单元;
或者,
所述至少两个时频单元是频域不同,且时域上连续的至少两个时频单元;
或者,
所述至少两个时频单元是频域不同,且时域上不连续的至少两个时频单元。
可选的,所述资源指示信息用于指示所述至少两个时频单元的起始时频位置。
本公开一示例性实施例提供了一种随机接入装置,能够实现本公开上述图7或者图8所示实施例中由终端执行的全部或者部分步骤,该随机接入装置包括:处理器、用于存储处理器可执行指令的存储器;
其中,所述处理器被配置为:
向基站发送随机接入前导码;
接收所述基站发送的随机接入响应RAR,所述RAR中包含用于指示至少两个时频单元的资源指示信息,所述至少两个时频单元是非授权信道上时域不同的时频单元;
在第一时频单元上向所述基站发送第一随机接入消息三MSG3,所述第一时频单元是所述至少两个时频单元中的任一时频单元;所述第一MSG3中包含所述终端的终端标识;
接收所述基站发送的第一随机接入消息四MSG4,所述第一MSG4中携带有所述终端的终端标识,以及所述基站为所述第一终端分配的第一小区无线网络临时标识C-RNTI。
可选的,所述处理器被配置为:
通过先听后说LBT方式,在所述第一时频单元上发送所述第一MSG3。
可选的,所述终端标识为对应终端的国际移动终端识别码IMSI或为一个随机数。
可选的,所述至少两个时频单元是频域相同,且时域上连续的至少两个时频单元;
或者,
所述至少两个时频单元是频域相同,且时域上不连续的至少两个时频单元;
或者,
所述至少两个时频单元是频域不同,且时域上连续的至少两个时频单元;
或者,
所述至少两个时频单元是频域不同,且时域上不连续的至少两个时频单元。
可选的,所述资源指示信息用于指示所述至少两个时频单元的起始时频位置。
上述主要以终端和基站为例,对本公开实施例提供的方案进行了介绍。可以理解的是,终端和基站为了实现上述功能,其包含了执行各个功能相应的硬件结构和/或软件模块。结合本公开中所公开的实施例描述的各示例的模块及算法步骤,本公开实施例能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行,取决于技术方案的特定应用和设计约束条件。本领域技术人员可以对每个特定的应用来使用不同的方法来实现所描述的功能,但是这种实现不应认为超出本公开实施例的技术方案的范围。
图18是根据一示例性实施例示出的一种随机接入装置的结构示意图。该装置1800可以实现为上述各个实施例中的终端或者基站。
装置1800包括通信单元1804和处理器1802。其中,处理器1802也可以为控制器,图18中表示为“控制器/处理器1802”。通信单元1804用于支持终端与其它网络设备(例如基站等)进行通信。
进一步的,装置1800还可以包括存储器1803,存储器1803用于存储终端1800的程序代码和数据。
可以理解的是,图18仅仅示出了装置1800的简化设计。在实际应用中,装置1800可以包含任意数量的处理器,控制器,存储器,通信单元等,而所有可以实现本公开实施例的终端或者基站都在本公开实施例的保护范围之内。
本领域技术人员应该可以意识到,在上述一个或多个示例中,本公开实施例所描述的功能可以用硬件、软件、固件或它们的任意组合来实现。当使用软 件实现时,可以将这些功能存储在计算机可读介质中或者作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机存储介质和通信介质,其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是通用或专用计算机能够存取的任何可用介质。
本公开实施例还提供了一种计算机存储介质,用于储存为上述终端或基站所用的计算机软件指令,其包含用于执行上述随机接入方法所设计的程序。
本领域技术人员在考虑说明书及实践这里公开的发明后,将容易想到本公开的其它实施方案。本公开旨在涵盖本公开的任何变型、用途或者适应性变化,这些变型、用途或者适应性变化遵循本公开的一般性原理并包括本公开未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的,本公开的真正范围和精神由下面的权利要求指出。
应当理解的是,本公开并不局限于上面已经描述并在附图中示出的精确结构,并且可以在不脱离其范围进行各种修改和改变。本公开的范围仅由所附的权利要求来限制。
Claims (28)
- 一种随机接入方法,其特征在于,所述方法由基站执行,所述方法包括:接收随机接入前导码;根据接收到的所述随机接入前导码发送随机接入响应RAR,所述RAR中包含用于指示至少两个时频单元的资源指示信息,所述至少两个时频单元是非授权信道上时域不同的时频单元;接收第一终端在第一时频单元上发送的第一随机接入消息三MSG3,所述第一时频单元是所述至少两个时频单元中的任一时频单元;所述第一MSG3中包含所述第一终端的终端标识;向所述第一终端发送第一随机接入消息四MSG4,所述第一MSG4中携带有所述第一终端的终端标识,以及为所述第一终端分配的第一小区无线网络临时标识C-RNTI。
- 根据权利要求1所述的方法,其特征在于,所述向所述第一终端发送第一随机接入消息四MSG4之前,还包括:当在所述第一时频单元上解析出两个或两个以上终端分别对所述RAR反馈的MSG3时,确定所述两个或者两个以上终端中的所述第一终端是本次随机接入成功的终端。
- 根据权利要求1所述的方法,其特征在于,所述接收第一终端在第一时频单元上发送的第一随机接入消息三MSG3,包括:接收所述第一终端按照先听后说LBT方式,在所述第一时频单元上发送的所述第一MSG3。
- 根据权利要求1所述的方法,其特征在于,所述方法还包括:接收第二终端在第二时频单元上发送的第二MSG3,所述第二时频单元是所述至少两个时频单元中的另一时频单元;所述第二MSG3中包含所述第二终端的终端标识;向所述第二终端发送第二随机接入消息四MSG4,所述第二MSG4中携带有所述第二终端的终端标识,以及为所述第二终端分配的第二小区无线网络临时标识C-RNTI;所述第一C-RNTI与所述第二C-RNTI不同。
- 根据权利要求1至4任一所述的方法,其特征在于,所述终端标识为对应终端的国际移动终端识别码IMSI或为一个随机数。
- 根据权利要求1至4任一所述的方法,其特征在于;所述至少两个时频单元是频域相同,且时域上连续的至少两个时频单元;或者,所述至少两个时频单元是频域相同,且时域上不连续的至少两个时频单元;或者,所述至少两个时频单元是频域不同,且时域上连续的至少两个时频单元;或者,所述至少两个时频单元是频域不同,且时域上不连续的至少两个时频单元。
- 根据权利要求6所述的方法,其特征在于,所述资源指示信息用于指示所述至少两个时频单元的起始时频位置。
- 一种随机接入方法,其特征在于,所述方法由终端执行,所述方法包括:向基站发送随机接入前导码;接收所述基站发送的随机接入响应RAR,所述RAR中包含用于指示至少两个时频单元的资源指示信息,所述至少两个时频单元是非授权信道上时域不同的时频单元;在第一时频单元上向所述基站发送第一随机接入消息三MSG3,所述第一时频单元是所述至少两个时频单元中的任一时频单元;所述第一MSG3中包含所述终端的终端标识;接收所述基站发送的第一随机接入消息四MSG4,所述第一MSG4中携带有所述终端的终端标识,以及所述基站为所述第一终端分配的第一小区无线网络临时标识C-RNTI。
- 根据权利要求8所述的方法,其特征在于,所述在第一时频单元上向所述基站发送第一随机接入消息三MSG3,包括:通过先听后说LBT方式,在所述第一时频单元上发送所述第一MSG3。
- 根据权利要求8或9所述的方法,其特征在于,所述终端标识为对应终端的国际移动终端识别码IMSI或为一个随机数。
- 根据权利要求8或9所述的方法,其特征在于;所述至少两个时频单元是频域相同,且时域上连续的至少两个时频单元;或者,所述至少两个时频单元是频域相同,且时域上不连续的至少两个时频单元;或者,所述至少两个时频单元是频域不同,且时域上连续的至少两个时频单元;或者,所述至少两个时频单元是频域不同,且时域上不连续的至少两个时频单元。
- 根据权利要求11所述的方法,其特征在于,所述资源指示信息用于指示所述至少两个时频单元的起始时频位置。
- 一种随机接入装置,其特征在于,所述装置用于基站中,所述装置包括:第一接收模块,用于接收随机接入前导码;第一发送模块,用于根据接收到的所述随机接入前导码发送随机接入响应RAR,所述RAR中包含用于指示至少两个时频单元的资源指示信息,所述至少两个时频单元是非授权信道上时域不同的时频单元;第二接收模块,用于接收第一终端在第一时频单元上发送的第一随机接入消息三MSG3,所述第一时频单元是所述至少两个时频单元中的任一时频单元;所述第一MSG3中包含所述第一终端的终端标识;第二发送模块,用于向所述第一终端发送第一随机接入消息四MSG4,所述第一MSG4中携带有所述第一终端的终端标识,以及为所述第一终端分配的第一小区无线网络临时标识C-RNTI。
- 根据权利要求13所述的装置,其特征在于,所述装置还包括:确定模块,用于在所述第二发送模块向所述第一终端发送第一随机接入消 息四MSG4之前,当在所述第一时频单元上解析出两个或两个以上终端分别对所述RAR反馈的MSG3时,确定所述两个或者两个以上终端中的所述第一终端是本次随机接入成功的终端。
- 根据权利要求13所述的装置,其特征在于,所述第二接收模块,具体用于,接收所述第一终端按照先听后说LBT方式,在所述第一时频单元上发送的所述第一MSG3。
- 根据权利要求13所述的装置,其特征在于,所述装置还包括:第三接收模块,用于接收第二终端在第二时频单元上发送的第二MSG3,所述第二时频单元是所述至少两个时频单元中的另一时频单元;所述第二MSG3中包含所述第二终端的终端标识;第三发送模块,用于向所述第二终端发送第二随机接入消息四MSG4,所述第二MSG4中携带有所述第二终端的终端标识,以及为所述第二终端分配的第二小区无线网络临时标识C-RNTI;所述第一C-RNTI与所述第二C-RNTI不同。
- 根据权利要求13至16任一所述的装置,其特征在于,所述终端标识为对应终端的国际移动终端识别码IMSI或为一个随机数。
- 根据权利要求13至16任一所述的装置,其特征在于;所述至少两个时频单元是频域相同,且时域上连续的至少两个时频单元;或者,所述至少两个时频单元是频域相同,且时域上不连续的至少两个时频单元;或者,所述至少两个时频单元是频域不同,且时域上连续的至少两个时频单元;或者,所述至少两个时频单元是频域不同,且时域上不连续的至少两个时频单元。
- 根据权利要求18所述的装置,其特征在于,所述资源指示信息用于指示所述至少两个时频单元的起始时频位置。
- 一种随机接入装置,其特征在于,所述装置用于终端中,所述装置包括:第四发送模块,用于向基站发送随机接入前导码;第四接收模块,用于接收所述基站发送的随机接入响应RAR,所述RAR中包含用于指示至少两个时频单元的资源指示信息,所述至少两个时频单元是非授权信道上时域不同的时频单元;第五发送模块,用于在第一时频单元上向所述基站发送第一随机接入消息三MSG3,所述第一时频单元是所述至少两个时频单元中的任一时频单元;所述第一MSG3中包含所述终端的终端标识;第五接收模块,用于接收所述基站发送的第一随机接入消息四MSG4,所述第一MSG4中携带有所述终端的终端标识,以及所述基站为所述第一终端分配的第一小区无线网络临时标识C-RNTI。
- 根据权利要求20所述的装置,其特征在于,所述第五发送模块,具体用于,通过先听后说LBT方式,在所述第一时频单元上发送所述第一MSG3。
- 根据权利要求20或21所述的装置,其特征在于,所述终端标识为对应终端的国际移动终端识别码IMSI或为一个随机数。
- 根据权利要求20或21所述的装置,其特征在于;所述至少两个时频单元是频域相同,且时域上连续的至少两个时频单元;或者,所述至少两个时频单元是频域相同,且时域上不连续的至少两个时频单元;或者,所述至少两个时频单元是频域不同,且时域上连续的至少两个时频单元;或者,所述至少两个时频单元是频域不同,且时域上不连续的至少两个时频单元。
- 根据权利要求23所述的装置,其特征在于,所述资源指示信息用于指 示所述至少两个时频单元的起始时频位置。
- 一种随机接入装置,其特征在于,所述装置用于基站中,所述装置包括:处理器;用于存储所述处理器的可执行指令的存储器;其中,所述处理器被配置为:接收随机接入前导码;根据接收到的所述随机接入前导码发送随机接入响应RAR,所述RAR中包含用于指示至少两个时频单元的资源指示信息,所述至少两个时频单元是非授权信道上时域不同的时频单元;接收第一终端在第一时频单元上发送的第一随机接入消息三MSG3,所述第一时频单元是所述至少两个时频单元中的任一时频单元;所述第一MSG3中包含所述第一终端的终端标识;向所述第一终端发送第一随机接入消息四MSG4,所述第一MSG4中携带有所述第一终端的终端标识,以及为所述第一终端分配的第一小区无线网络临时标识C-RNTI。
- 一种随机接入装置,其特征在于,所述装置用于终端中,所述装置包括:处理器;用于存储所述处理器的可执行指令的存储器;其中,所述处理器被配置为:向基站发送随机接入前导码;接收所述基站发送的随机接入响应RAR,所述RAR中包含用于指示至少两个时频单元的资源指示信息,所述至少两个时频单元是非授权信道上时域不同的时频单元;在第一时频单元上向所述基站发送第一随机接入消息三MSG3,所述第一时频单元是所述至少两个时频单元中的任一时频单元;所述第一MSG3中包含所述终端的终端标识;接收所述基站发送的第一随机接入消息四MSG4,所述第一MSG4中携带 有所述终端的终端标识,以及所述基站为所述第一终端分配的第一小区无线网络临时标识C-RNTI。
- 一种计算机可读存储介质,其特征在于,所述计算机可读存储介质中包含可执行指令,基站中的处理器调用所述可执行指令以实现上述权利要求1至7任一所述的随机接入方法。
- 一种计算机可读存储介质,其特征在于,所述计算机可读存储介质中包含可执行指令,终端中的处理器调用所述可执行指令以实现上述权利要求8至12任一所述的随机接入方法。
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Publication number | Priority date | Publication date | Assignee | Title |
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WO2020204681A1 (ko) * | 2019-03-29 | 2020-10-08 | 엘지전자 주식회사 | 무선 통신 시스템에서 신호를 송수신하는 방법 및 이를 지원하는 장치 |
JP7218434B2 (ja) * | 2019-05-16 | 2023-02-06 | 京セラ株式会社 | 通信制御方法及びユーザ装置 |
US20220353917A1 (en) * | 2019-07-03 | 2022-11-03 | Beijing Xiaomi Mobile Software Co., Ltd. | Random access method, apparatus and system, and storage medium |
KR20220046611A (ko) * | 2019-08-14 | 2022-04-14 | 베이징 시아오미 모바일 소프트웨어 컴퍼니 리미티드 | 랜덤 액세스 메시지 전송 방법, 장치 및 판독 가능 저장 매체 |
CN112673702B (zh) * | 2019-08-16 | 2023-07-25 | 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 |
CN113692773A (zh) * | 2019-08-16 | 2021-11-23 | Oppo广东移动通信有限公司 | 信息指示方法、装置、设备及存储介质 |
CN112075118B (zh) * | 2020-08-05 | 2024-06-21 | 北京小米移动软件有限公司 | 随机接入的方法、装置、设备及存储介质 |
CN113163507A (zh) * | 2021-03-15 | 2021-07-23 | 新华三技术有限公司 | 一种处理随机接入的方法、***和基站 |
CN117528526A (zh) * | 2022-07-29 | 2024-02-06 | 华为技术有限公司 | 一种通信方法及装置 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106576302A (zh) * | 2014-08-18 | 2017-04-19 | 三星电子株式会社 | 许可和未许可频段上的通信 |
WO2017135803A1 (en) * | 2016-02-04 | 2017-08-10 | Samsung Electronics Co., Ltd. | Method and apparatus for ue signal transmission in 5g cellular communications |
CN107371273A (zh) * | 2016-05-13 | 2017-11-21 | 中兴通讯股份有限公司 | 随机接入方法、装置及用户设备 |
CN107466113A (zh) * | 2016-06-03 | 2017-12-12 | 北京佰才邦技术有限公司 | 一种Msg3传输方法、装置和相关设备 |
CN107926048A (zh) * | 2015-08-12 | 2018-04-17 | 高通股份有限公司 | 共享通信介质上的基于争用的共存 |
CN108024310A (zh) * | 2016-11-04 | 2018-05-11 | 华为技术有限公司 | 用于传输数据的方法、终端设备和网络设备 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9661654B2 (en) * | 2010-01-12 | 2017-05-23 | Samsung Electronics Co., Ltd. | Apparatus and method for accessing random access channel in a wireless communication system |
CN101980576B (zh) * | 2010-10-19 | 2013-08-28 | 华为技术有限公司 | 随机接入处理方法和用户设备 |
WO2014175788A1 (en) * | 2013-04-22 | 2014-10-30 | Telefonaktiebolaget L M Ericsson (Publ) | Transmission of a random access response message |
US9603165B2 (en) * | 2015-01-30 | 2017-03-21 | Telefonaktiebolaget L M Ericsson (Publ) | Random-access response with analog beamforming |
CN106993335B (zh) * | 2016-01-21 | 2022-03-01 | 中兴通讯股份有限公司 | 前导码发送、接收方法、装置、用户设备及基站 |
WO2017131430A1 (en) * | 2016-01-26 | 2017-08-03 | Lg Electronics Inc. | Method for performing a random access procedure in wireless communication system and a device therefor |
CN105828450B (zh) * | 2016-03-11 | 2019-09-17 | 京信通信***(中国)有限公司 | 一种竞争接入的方法及装置 |
US10368353B2 (en) * | 2017-01-27 | 2019-07-30 | Qualcomm Incorporated | Adaptive subcarrier spacing configuration |
US11533758B2 (en) * | 2017-09-27 | 2022-12-20 | Lg Electronics Inc. | Method for transmitting and receiving uplink data between terminal and base station in wireless communication system and device supporting same |
AU2018364988B2 (en) * | 2017-11-09 | 2021-04-29 | Beijing Xiaomi Mobile Software Co., Ltd. | Methods and apparatuses for communications based on wireless device capabilities |
JP7348183B2 (ja) * | 2017-12-20 | 2023-09-20 | オッポ広東移動通信有限公司 | ランダムアクセスプリアンブルの伝送方法及び端末装置 |
CN118139200A (zh) * | 2018-06-19 | 2024-06-04 | 交互数字专利控股公司 | 用于在非授权频谱中进行***接入的方法、装置和*** |
US20200146071A1 (en) * | 2018-11-07 | 2020-05-07 | QUALCOMM lncorporated | Robust random access response |
-
2019
- 2019-01-18 EP EP19910027.2A patent/EP3908071A4/en active Pending
- 2019-01-18 CN CN201980000076.5A patent/CN109863816B/zh active Active
- 2019-01-18 US US17/423,474 patent/US20220078851A1/en active Pending
- 2019-01-18 WO PCT/CN2019/072430 patent/WO2020147130A1/zh unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106576302A (zh) * | 2014-08-18 | 2017-04-19 | 三星电子株式会社 | 许可和未许可频段上的通信 |
CN107926048A (zh) * | 2015-08-12 | 2018-04-17 | 高通股份有限公司 | 共享通信介质上的基于争用的共存 |
WO2017135803A1 (en) * | 2016-02-04 | 2017-08-10 | Samsung Electronics Co., Ltd. | Method and apparatus for ue signal transmission in 5g cellular communications |
CN107371273A (zh) * | 2016-05-13 | 2017-11-21 | 中兴通讯股份有限公司 | 随机接入方法、装置及用户设备 |
CN107466113A (zh) * | 2016-06-03 | 2017-12-12 | 北京佰才邦技术有限公司 | 一种Msg3传输方法、装置和相关设备 |
CN108024310A (zh) * | 2016-11-04 | 2018-05-11 | 华为技术有限公司 | 用于传输数据的方法、终端设备和网络设备 |
Non-Patent Citations (1)
Title |
---|
See also references of EP3908071A4 * |
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