WO2023198022A1 - 随机接入方法及设备 - Google Patents

随机接入方法及设备 Download PDF

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Publication number
WO2023198022A1
WO2023198022A1 PCT/CN2023/087499 CN2023087499W WO2023198022A1 WO 2023198022 A1 WO2023198022 A1 WO 2023198022A1 CN 2023087499 W CN2023087499 W CN 2023087499W WO 2023198022 A1 WO2023198022 A1 WO 2023198022A1
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WO
WIPO (PCT)
Prior art keywords
random access
target
preamble
beams
network device
Prior art date
Application number
PCT/CN2023/087499
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English (en)
French (fr)
Inventor
邓云
Original Assignee
展讯通信（上海）有限公司
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Publication of WO2023198022A1 publication Critical patent/WO2023198022A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • 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

Definitions

  • UE User Equipment
  • Preamble preambles
  • the network device When the network device receives the Preamble sent by the UE using multiple different beams, if it also uses these multiple different beams to send a random access response (Random Access Response, RAR for short) to the UE, the RAR sent may be Domain overlap, the UE receives RAR sent in different beams at the same time, which requires high processing complexity for the UE. At the same time, the network equipment uses multiple beams to send RAR, which will also cause a waste of transmission resources, and when the signal condition is not good, the beam sending RAR, the probability of transmission failure is higher.
  • RAR Random Access Response
  • the embodiments of the present application provide a random access method and device, which enables the network device to select a beam with the strongest signal strength to send RAR to the UE during the multi-beam random access process, thereby reducing the processing time of the UE and the network device. complexity and improves the success rate of random access.
  • embodiments of the present application provide a random access method, which is applied to UE.
  • the method includes:
  • receiving a random access response sent by the network device includes:
  • the random access response is received on the target beam, or the random access response is continuously received on the target beam.
  • the plurality of first beams are the first several beams sorted from strong to weak in signal strength in the serving cell where the UE is currently camped.
  • the method before sending target preambles to the network device respectively for the plurality of first beams, the method further includes:
  • sending target preambles to the network device respectively for multiple first beams includes:
  • the target preamble is sent respectively on the random access opportunity (RACH (Random Access Channel) Occasion, referred to as RO) corresponding to each of the first beams; wherein, the target preamble
  • RACH Random Access Channel
  • RO Random Access Channel
  • DMRS DeModulation Reference Signal
  • receiving a random access response sent by the network device includes:
  • RA-RNTI Random Access-Radio Network Temporary Identifier
  • the random access response sent by the network device using the target beam is received.
  • embodiments of the present application provide a random access method, which is applied to network equipment.
  • the method includes:
  • inventions of the present application provide a random access device, which is applied to a UE.
  • the device includes:
  • a sending module configured to send a target preamble to the network device for each of the plurality of first beams, where the target preamble is a preamble corresponding to the target beam with the strongest signal strength among the plurality of first beams;
  • a receiving module configured to receive a random access response sent by the network device.
  • inventions of the present application provide a random access device, which is used in network equipment.
  • the device includes:
  • a receiving module configured to respectively receive target preambles sent by the user equipment UE for multiple first beams
  • a sending module configured to use the target beam to send a random access response to the UE.
  • embodiments of the present application provide a network device, including: at least one processor and a memory;
  • the memory stores computer execution instructions
  • the at least one processor executes the computer execution instructions stored in the memory, so that the at least one processor executes the random access method provided in the second aspect.
  • the processor executes the computer execution instructions
  • the random access method as provided in the second aspect is implemented.
  • the UE sends target preambles to the network device for multiple first beams respectively.
  • the target preambles correspond to the target beam with the strongest signal strength among the multiple first beams.
  • the network device can determine the target beam corresponding to the target preamble based on the correspondence between the preamble and the beam, and then use the target beam with the strongest signal strength to send to the UE RAR not only reduces the processing complexity of UE and network equipment, but also improves the success rate of random access.
  • FIG. 7 is a schematic diagram of the hardware structure of an electronic device provided in an embodiment of the present application.
  • Embodiments of the present application can be applied to various communication systems, such as: advanced long term evolution (Advanced long term evolution, LTE-A) system, new radio (New Radio, NR) System, evolution system of NR system, LTE-based access to unlicensed spectrum (LTE-U) system on unlicensed spectrum, NR-based access to unlicensed spectrum (NR-U) system on unlicensed spectrum, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), next-generation communication system or other communication systems, etc.
  • Advanced long term evolution Advanced long term evolution
  • NR new radio
  • NR-U NR-based access to unlicensed spectrum
  • UMTS Universal Mobile Telecommunication System
  • WLAN Wireless Local Area Networks
  • WiFi Wireless Fidelity
  • the communication system in the embodiment of the present application can be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, a dual connectivity (Dual Connectivity, DC) scenario, or a standalone (Standalone, SA) deployment scenario.
  • CA Carrier Aggregation
  • DC Dual Connectivity
  • SA standalone deployment scenario.
  • Figure 1 is a schematic architectural diagram of a wireless communication system provided by an embodiment of the present application.
  • the wireless communication system provided by this embodiment includes UE101 and network device 102.
  • the embodiment of the present application is not limited to this, as long as the UE 101 can wirelessly communicate with the network device 102.
  • the network device 102 is a public mobile communication network device. It is an interface device for UE101 to access the Internet. It is also a form of radio station and refers to the information transfer between UE101 and UE101 in a certain radio coverage area.
  • Radio transceiver stations including Base Station (BS), also known as base station equipment, are devices deployed in the Radio Access Network (RAN) to provide wireless communication functions.
  • BS Base Station
  • RAN Radio Access Network
  • the equipment that provides the base station function in the 2G network includes the Base Transceiver Station (BTS)
  • the equipment that provides the base station function in the 3G network includes the NodeB
  • the equipment that provides the base station function in the 4G network includes the Evolution Node B (evolved NodeB, eNB).
  • the device that provides base station functions is the access point (Access Point, AP for short).
  • E-UTRA Evolved Universal Terrestrial Radio Access
  • both gNB and ng-eNB can be connected to the 5G core network.
  • the network device 102 in the embodiment of the present application also includes equipment that provides base station functions in new future communication systems.
  • the embodiment of this application defines the one-way communication link from the access network to the UE as the downlink, the data transmitted on the downlink is downlink data, and the transmission direction of the downlink data is called the downlink direction; and the UE to the access network
  • the one-way communication link is the uplink, the data transmitted on the uplink is uplink data, and the transmission direction of the uplink data is called the uplink direction.
  • the network device can send uplink scheduling information (UL Grant) to the UE through downlink control information (Downlink Control Information, referred to as DCI), indicating uplink physical shared channel (Physical Uplink Shared Channel, referred to as PUSCH) transmission , so that the UE can send data.
  • UL Grant uplink scheduling information
  • DCI Downlink Control Information
  • PUSCH Physical Uplink Shared Channel
  • the UE when the UE accesses the network, it needs to initiate random access to obtain uplink synchronization.
  • a UE in the connected state also needs to initiate random access in some scenarios. For example, when the uplink is out of synchronization, if the UE has uplink data to transmit, the UE needs to initiate a competitive random access (Contention based Random Access Procedure); When the uplink is out of sync, if the base station needs to send data to the UE, the base station can trigger the UE to perform random access (competitive or non-competitive random access) through physical downlink control signaling; when the UE sends a schedule that reaches the preset threshold number of times After the request, if the base station has not sent an UL Grant to the UE, the UE needs to trigger competitive random access.
  • a competitive random access Contention based Random Access Procedure
  • Figure 2 is a signaling diagram of a competitive random access process provided in an embodiment of the present application.
  • the above competitive random access process includes:
  • Step 1 The UE randomly selects a preamble and sends it on the Physical Random Access Channel (PRACH). That is, Msg1 is sent: Random Access Preamble.
  • PRACH Physical Random Access Channel
  • Step 2 The UE receives the Random Access Response (RAR) sent by the network device, namely Msg2.
  • RAR Random Access Response
  • Step 3 The UE sends scheduled transmission information (Scheduled Transmission), namely Msg3, based on the uplink resources contained in the RAR.
  • Scheduled Transmission namely Msg3
  • MSG3 when the UE initially accesses the network, MSG3 contains an RRC connection request; when the UE implements handover, MSG3 contains a handover completion message.
  • Step 4 If the UE receives the conflict resolution information (Contention Resolution), i.e. Msg4, it is considered that the conflict resolution is successful and the random access process is successful. If the UE does not receive the scheduling from the base station within a certain period of time, it is considered that the conflict resolution failed.
  • Contention Resolution i.e. Msg4
  • a large serving cell requires multiple beams to achieve complete coverage. One beam only needs Can cover a limited range.
  • a small serving cell may contain only one beam.
  • beam scanning Beam sweeping
  • the UE When performing random access, the UE needs to first confirm the Beam with the strongest signal strength where it is located, that is, the strongest synchronization signal block of the measured serving cell. According to the random access timing (RACH- Occasion (RO for short) selects the corresponding Preamble and initiates the random access process. The RAR is then received according to the reception characteristics of the synchronization signal block.
  • RACH- Occasion RO for short
  • the Transmission Configuration Indicator is used to characterize the transmission characteristics of the beam, such as Doppler frequency shift, delay, etc.
  • the UE uses the TCI of the Beam with the strongest signal strength to receive the RAR within a time window. That is, when detecting RAR, the UE believes that the demodulation reference signal DMRS and the Beam with the strongest signal (different SSB indexes correspond to different Beams) are Gaussian coexistence (quasi co-location properties).
  • the base station needs to combine and receive the UE's response to multiple Beams.
  • the UE may send the same Preamble or a different Preamble. If the base station does not implement combined reception, the UE sends different Preambles for different Beams; if the base station wants to implement combined reception, the UE sends the same Preamble. However, the UE sends Preamble for different Beams. How the base station chooses the most appropriate Beam, that is, the Beam with the strongest signal strength measured by the UE to send RAR is a technical problem that needs to be solved urgently.
  • the network device receives the Preamble sent by the UE using multiple different beams, if it also uses these multiple different beams to send RAR to the UE, the sent RARs may overlap in the time domain, and the UE simultaneously receives different signals.
  • RAR sent by beams requires high processing complexity for the UE.
  • network equipment using multiple beams to send RAR will also cause a waste of transmission resources, and when RAR is sent in a beam with poor signal conditions, the probability of transmission failure is high.
  • inventions of the present application provide a random access method.
  • the UE sends target preambles to the network device for multiple first beams.
  • the target preamble is the highest signal strength among the multiple first beams.
  • the preamble corresponding to the strong target beam after receiving the target preamble, the network device can determine the target beam corresponding to the target preamble based on the correspondence between the preamble and the beam, and then use the signal with the strongest signal strength.
  • the target beam sends RAR to the UE. Detailed examples are used for detailed description below.
  • Figure 3 is a schematic flow chart of a random access method provided in an embodiment of the present application.
  • the random access method can be applied in UE.
  • the above random access method may be executed by the UE, or may be executed by a chip or a specific module in the UE.
  • S301 Send target preambles to the network device respectively for multiple first beams, where the target preambles are preambles corresponding to the target beam with the strongest signal strength among the multiple first beams.
  • a serving cell usually consists of 4 BWPs, where the initial BWP (Initial BWP) is Bandwidth Part 0.
  • the UE in the idle state/inactive state resides on this BWP, and the base station transmits on this BWP.
  • System information (SI), paging message usually indicates the random access resources applicable to the initial BWP, the preamble available for random access (assuming 64 Preambles here), the time-frequency location of random access, etc.
  • the system message also indicates the initial BWP Bandwidth (such as 20MHz).
  • a serving cell may have 16 beams (Beam), Beam index It is Beam index 0 ⁇ Beam index 15 (that is, synchronization signal block SSB0 ⁇ SSB15).
  • the random access configuration indicates the random access timing RO corresponding to different Beams, and the Preamble corresponding to different Beams.
  • the UE can pre-measure the signal strength of each beam in the serving cell where it currently resides, and when performing the random access procedure, select the first beam with the highest signal strength ranking from multiple beams.
  • the first beam in the top order can be the first several beams sorted strictly according to the signal strength of the beam measured by the UE, such as beam 1 with the strongest signal strength and beam 2 with the second strongest signal strength; it can also include the beams measured by the UE.
  • the strongest beam and other non-sub-strongest beams for example, the beam with the strongest signal measured by the UE is beam 2, the second-strongest beam is beam 4, the third-ranked beam is beam 3, and the fourth-ranked beam 5, the UE follows
  • the first beam selected by the signal strength sorting may include beam 2 and beam 3, or the first beam selected by the ranking may be beam 2, beam 3 and beam 5.
  • the UE needs to know the number of transmissions of the corresponding Preamble, that is, the number of transmissions required for multiple Beams; assuming there are two coverage levels, the SSB received signal strength measured by the UE is between [-104dbm to -108dbm] requires 8 transmissions, which corresponds to coverage level one; when the UE measures that the SSB received signal strength is [-108dbm to -112dbm], it requires 16 transmissions.
  • Several specific coverage levels can be set by the network device.
  • the UE determines its coverage level based on the measured signal strength of the SSB and the RSRP of the top-ranked (highest) SSB, and then performs the random access process according to the corresponding number of Preamble transmissions.
  • the UE determines the first beam from the top-ranked beams (the strongest ones).
  • a target beam with the strongest signal strength is determined from the multiple first beams; and one of the multiple preambles corresponding to the target beam is randomly selected as the target preamble.
  • the UE When performing random access, the UE sends the target Preamble to the network device for each first beam respectively. This means that the UE sends the target Preamble to the network device in the RO corresponding to each first beam.
  • the network device when the network device receives the target Preamble sent by the UE, it can determine the target beam corresponding to the target preamble based on the preset correspondence between the preamble and the beam.
  • MSG3 can be sent multiple times.
  • the UE may send MSG3 to the network device for each first beam respectively, and receive MSG4 sent by the network device using the above target beam.
  • the UE may also send MSG3 to the network device for the above target beam, and receive MSG4 sent by the network device using the above target beam.
  • the UE sends target preambles to the network device for multiple first beams respectively.
  • the target preamble is the preamble corresponding to the target beam with the strongest signal strength among the multiple first beams.
  • code after receiving the target preamble, the network device can determine the target beam corresponding to the target preamble based on the correspondence between the preamble and the beam, and then use the target beam with the strongest signal strength to send RAR to the UE. It not only reduces the processing complexity of UE and network equipment, but also improves the success rate of random access.
  • the plurality of first beams may be the first several beams sorted from strong to weak in signal strength in the serving cell where the UE currently resides.
  • the above random access methods include:
  • Step 1 Determine the first several (strongest) first beams in the serving cell where the UE currently resides in order from strong to weak signal strength, and the target beam with the strongest signal strength among the plurality of first beams. ;Select one preamble as the target preamble among multiple preambles corresponding to the target beam.
  • the number of first beams may be configured by the network device.
  • Step 2 Send target preambles to the network device respectively for multiple first beams.
  • the measured signal strength is obtained by The first three beams ranked from strong to weak are Beam index3, Beam index4 and Beam index6, among which Beam index4 is the beam with the strongest signal strength among these three beams.
  • the UE When the UE carries out a random access process for multiple Beams, in order for the network device to know the strongest Beam where the UE is located from the Preamble sent by the UE, the UE selects the Preamble corresponding to Beam index 4 where it is located. For example, there are 4 Preambles corresponding to Beam index 4: Preamble17, Preamble18, Preamble19, and Preamble20. The UE can randomly select any one of them. Assuming that the UE selects Preamble18, the UE sends Preamble18 on the RO corresponding to the three measured beams (Beam index3, Beam index4 and Beam index6).
  • the UE can send Preamble18 multiple times (for example, each time it sends it three times on the RO corresponding to Beam index3, Beam index4, and Beam index6).
  • the above number of sending depends on the configuration of the system message.
  • the serving cell can send it according to the configuration of the UE.
  • the measured signal quality of the serving cell RSRP sets the number of times that needs to be sent.
  • the network device combines and receives the Preamble 18 sent by the UE on the RO corresponding to Beam index 3, Beam index 4 and Beam index 6.
  • the network device can infer that Preamble 18 corresponds to Beam index 4 based on the correspondence between Beam index and Preamble. From this, the network device can determine the strongest location of the UE. Beam is Beam index 4. At this time, the network device can send a random access response to the UE on this Beam.
  • the UE can start receiving the random access response in the corresponding time slot, such as time slot n+3, according to the settings in the system message. .
  • the UE receives the random access response according to the TCI of Beam index 4 based on the strongest Beam it is located in.
  • the UE may need to receive multiple random access responses continuously before it can combine and parse to obtain the correct content.
  • the UE needs to receive random access responses in multiple consecutive time slots and then merge them to successfully parse the random access responses.
  • the number of consecutive receptions can be set by system messages. For example, after sending the Preamble in time slot n, receive 8 consecutive RARs after time slot n+3.
  • the UE can calculate the RA-RANTI according to the RO corresponding to Preamble18 (i.e., Beam index 4), and receive the random access response based on the RA-RNTI. This prevents the UE from receiving RAR confusion due to different RA-RNTIs calculated by ROs corresponding to different Beams.
  • the random access method provided by the embodiments of this application can make full use of the existing random access configuration, so that the network device can identify the Beam with the strongest signal strength where the UE is located, and then send RAR on the Beam, thus improving the RAR Transmission success rate.
  • Step 1 Receive target preambles sent by the UE for multiple first beams respectively.
  • Step 3 Use the target beam to send a random access response to the UE.
  • the above random access method includes:
  • the UE determines the first several first beams sorted from strong to weak in signal strength of the currently camping serving cell, and the target beam with the strongest signal strength among the multiple first beams.
  • the UE selects one preamble from multiple preambles corresponding to the target beam as the target preamble.
  • the UE sends target preambles to the network device respectively for multiple first beams.
  • the network device determines the target beam corresponding to the target preamble based on the correspondence between the preamble and the beam.
  • the network device uses the target beam to send a random access response to the UE.
  • the UE sends target preambles to the network device respectively for the first several first beams sorted from strong to weak signal strength.
  • the target preambles are signals in the multiple first beams.
  • a strong target beam sends RAR to the UE, which not only reduces the processing complexity of the UE and network equipment, but also improves the success rate of random access.
  • FIG. 5 is a schematic diagram of a program module of a random access device provided in an embodiment of the present application.
  • the random access device 50 includes:
  • the sending module 501 is configured to send target preambles to the network device respectively for multiple first beams, where the target preambles are preambles corresponding to the target beam with the strongest signal strength among the multiple first beams.
  • the receiving module 502 is used to:
  • the random access response is received on the target beam, or the random access response is continuously received on the target beam.
  • the plurality of first beams are the first several beams sorted from strong to weak in signal strength in the serving cell where the UE is currently camped.
  • determining module for:
  • the sending module 501 is specifically used to:
  • the DMRS and the target beam when receiving the random access response are Gaussian coexistences.
  • the receiving module 502 is specifically used to:
  • FIG. 6 is a diagram provided in the embodiment of the present application.
  • the random access 60 includes:
  • the receiving module 601 is configured to receive target preambles sent by the UE for multiple first beams respectively.
  • the determination module 602 is configured to determine the target beam corresponding to the target preamble according to the corresponding relationship between the preamble and the beam.
  • a sending module 603 is configured to send a random access response to the UE using the target beam.
  • the specific execution content of the receiving module 601, the determining module 602 and the sending module 603 in the embodiment of this application is related to each step performed by the network device in the random access method described in the above embodiment. For details, please refer to the above. The contents described in the embodiments will not be repeated here.
  • embodiments of the present application also provide a user equipment, which includes at least one processor and a memory; wherein the memory stores computer execution instructions; the at least one processor The computer execution instructions stored in the memory are executed to implement the steps performed on the user equipment side in the above embodiment, which will not be described again in this embodiment.
  • the electronic device 70 of this embodiment includes: a processor 701 and a memory 702; wherein:
  • Memory 702 used to store computer execution instructions
  • the processor 701 is configured to execute computer execution instructions stored in the memory to implement various steps performed by the user equipment in the above embodiments. For details, please refer to the relevant descriptions in the foregoing method embodiments.
  • the processor 701 is used to execute computer execution instructions stored in the memory to implement
  • the processor 701 is used to execute computer execution instructions stored in the memory to implement
  • the memory 702 can be independent or integrated with the processor 701 .
  • the device When the memory 702 is provided independently, the device also includes a bus 703 for connecting the memory 702 and the processor 701 .
  • embodiments of the present application also provide a computer-readable storage medium.
  • the computer-readable storage medium stores computer execution instructions.
  • Instructions are issued to implement the steps performed on the user equipment side in the above embodiment.
  • embodiments of the present application also provide a computer-readable storage medium.
  • the computer-readable storage medium stores computer execution instructions.
  • the processor executes the computer execution instructions, instructions, to implement the steps performed by the network device side in the above embodiment.
  • embodiments of the present application also provide a computer program product, including a computer program.
  • the computer program When the computer program is executed by a processor, it implements execution on the user equipment side as in the above embodiments. or implement the steps performed on the network device side in the above embodiment.
  • the disclosed devices and methods can be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of modules is only a logical function division. In actual implementation, there may be other division methods, for example, multiple modules may be combined or integrated. to another system, or some features can be ignored, or not implemented.
  • the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, indirect coupling or communication connection of devices or modules, and may be in electrical, mechanical or other forms.
  • modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional module in each embodiment of the present application can be integrated into a processing unit , each module can exist physically alone, or two or more modules can be integrated into one unit.
  • the units formed by the above modules can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the above integrated modules implemented in the form of software function modules can be stored in a computer-readable storage medium.
  • the above-mentioned software function modules are stored in a storage medium and include a number of instructions to cause a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor (English: processor) to execute the various embodiments of this application. Some steps of the method.
  • processor may be a central processing unit (English: Central Processing Unit, referred to as: CPU), or other general-purpose processor, digital signal processor (English: Digital Signal Processor, referred to as: DSP), or an application-specific integrated circuit (English: Application Specific Integrated Circuit, abbreviation: ASIC), etc.
  • CPU Central Processing Unit
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • a general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.
  • the steps of the method disclosed in the application can be directly implemented by a hardware processor, or executed by a combination of hardware and software modules in the processor.
  • the bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc.
  • ISA Industry Standard Architecture
  • PCI Peripheral Component Interconnect
  • EISA Extended Industry Standard Architecture
  • the bus can be divided into address bus, data bus, control bus, etc.
  • the bus in the drawings of this application is not limited to only one bus or one type of bus.
  • the above storage medium can be implemented by any type of volatile or non-volatile storage device or their combination, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable Except programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.
  • SRAM static random access memory
  • EEPROM electrically erasable programmable read-only memory
  • EPROM erasable except programmable read-only memory
  • PROM programmable read-only memory
  • ROM read-only memory
  • magnetic memory flash memory
  • flash memory magnetic disk or optical disk.
  • Storage media can be any available media that can be accessed by a general purpose or special purpose computer.
  • An exemplary storage medium is coupled to the processor such that the processor can read information from the storage medium and write information to the storage medium.
  • the storage medium can also be processed components of the device.
  • the processor and storage medium may be located in Application Specific Integrated Circuits (ASIC).
  • ASIC Application Specific Integrated Circuits
  • the processor and the storage medium may also exist as discrete components in an electronic device or a host control device.
  • the aforementioned program can be stored in a computer-readable storage medium.
  • the steps including the above method embodiments are executed; and the aforementioned storage media include: ROM, RAM, magnetic disks, optical disks, and other media that can store program codes.

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Abstract

本申请实施例提供了一种随机接入方法及设备，涉及通信技术领域，包括：UE针对多个第一波束分别向网络设备发送目标前导码，该目标前导码为上述多个第一波束中信号强度最强的目标波束对应的前导码；网络设备在接收到目标前导码后，根据前导码与波束之间的对应关系，即可确定出目标前导码对应的目标波束，进而可以利用信号强度最强的目标波束向UE发送RAR，不仅降低了UE和网络设备的处理复杂度，还提升了随机接入的成功率。

Description

随机接入方法及设备
本申请要求于2022年04月14日提交中国专利局、申请号为202210392022.1、申请名称为“随机接入方法及设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及通信技术领域，尤其涉及一种随机接入方法及设备。
背景技术
在新无线(New Radio，简称NR)系统覆盖增强场景下，用户设备(User Equipment，简称UE)可以利用多个波束开展随机接入，即UE可以采用多个波束分别发送前导码(Preamble)。
当网络设备接收到UE采用多个不同的波束发送的Preamble时，若也采用这多个不同的波束向UE发送随机接入响应(Random Access Response，简称RAR)，则发送的RAR可能会在时域上重叠，UE同时接收以不同波束发送的RAR，对UE的处理复杂度要求很高，同时网络设备采用多个波束发送RAR也会造成传输资源的浪费，且在信号条件不好的波束发送RAR，传输失败的概率较大。
发明内容
本申请实施例提供一种随机接入方法及设备，可以使网络设备能够在多波束随机接入过程中选择一个信号强度最强的波束来向UE发送RAR，从而降低了UE和网络设备的处理复杂度，并提升了随机接入的成功率。
第一方面，本申请实施例提供一种随机接入方法，应用于UE中，所述方法包括：
针对多个第一波束分别向网络设备发送目标前导码，所述目标前导码为所述多个第一波束中信号强度最强的目标波束对应的前导码；
接收所述网络设备发送的随机接入响应。
在一种可行的实施方式中，所述接收所述网络设备发送的随机接入响应，包括：
在所述目标波束上接收所述随机接入响应，或者在所述目标波束上连续接收所述随机接入响应。
在一种可行的实施方式中，所述多个第一波束为所述UE当前驻留的服务小区按信号强度由强到弱排序的前若干个波束。
在一种可行的实施方式中，所述针对多个第一波束分别向网络设备发送目标前导码之前，还包括：
确定所述UE当前驻留的服务小区中按信号强度由强到弱排序的前若干个第一波束，以及所述若干个第一波束中信号强度最强的目标波束；
在所述目标波束对应的多个前导码中选择一个前导码作为所述目标前导码。
在一种可行的实施方式中，所述针对多个第一波束分别向网络设备发送目标前导码，包括：
使用所述目标前导码的发送次数，在各个所述第一波束对应的随机接入时机(RACH(Random Access Channel)Occasion，简称RO)上分别发送所述目标前导码；其中，所述目标前导码的发送次数由所述服务小区的系统消息确定。
在一种可行的实施方式中，接收所述随机接入响应时的解调参考信号(DeModulation Reference Signal，DMRS)与所述目标波束是高斯共存的。
在一种可行的实施方式中，所述接收所述网络设备发送的随机接入响应，包括：
按照所述目标波束对应的RO确定随机接入无线网络临时标识(Random Access-Radio Network Temporary Identifier，RA-RNTI)；
根据所述RA-RNTI，接收所述网络设备利用所述目标波束发送的所述随机接入响应。
第二方面，本申请实施例提供一种随机接入方法，应用于网络设备中，所述方法包括：
分别接收UE针对多个第一波束发送的目标前导码；
根据前导码与波束之间的对应关系，确定所述目标前导码对应的目标波束；
利用所述目标波束向所述UE发送随机接入响应。
第三方面，本申请实施例提供一种随机接入装置，应用于UE中，所述装置包括：
发送模块，用于针对多个第一波束分别向网络设备发送目标前导码，所述目标前导码为所述多个第一波束中信号强度最强的目标波束对应的前导码；
接收模块，用于接收所述网络设备发送的随机接入响应。
第四方面，本申请实施例提供一种随机接入装置，应用于网络设备中，所述装置包括：
接收模块，用于分别接收用户设备UE针对多个第一波束发送的目标前导码；
确定模块，用于根据前导码与波束之间的对应关系，确定所述目标前导码对应的目标波束；
发送模块，用于利用所述目标波束向所述UE发送随机接入响应。
第五方面，本申请实施例提供一种用户设备，包括：至少一个处理器和存储器；
所述存储器存储计算机执行指令；
所述至少一个处理器执行所述存储器存储的计算机执行指令，使得所述至少一个处理器执行如第一方面提供的随机接入方法。
第六方面，本申请实施例提供一种网络设备，包括：至少一个处理器和存储器；
所述存储器存储计算机执行指令；
所述至少一个处理器执行所述存储器存储的计算机执行指令，使得所述至少一个处理器执行如第二方面提供的随机接入方法。
第七方面，本申请实施例提供一种计算机可读存储介质，所述计算机可读存储介质中存储有计算机执行指令，当处理器执行所述计算机执行指令时，实现如第一方面提供的随机接入方法。
或者，当处理器执行所述计算机执行指令时，实现如第二方面提供的随机接入方法。
第八方面，本申请实施例提供一种计算机程序产品，包括计算机程序，该计算机程序被处理器执行时，实现如第一方面提供的随机接入方法，或 者实现如第二方面提供的随机接入方法。
本申请实施例所提供的随机接入方法及设备，UE针对多个第一波束分别向网络设备发送目标前导码，该目标前导码为上述多个第一波束中信号强度最强的目标波束对应的前导码；网络设备在接收到目标前导码后，根据前导码与波束之间的对应关系，即可确定出目标前导码对应的目标波束，进而可以利用信号强度最强的目标波束向UE发送RAR，不仅降低了UE和网络设备的处理复杂度，还提升了随机接入的成功率。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对本申请实施例或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其它的附图。
图1为本申请实施例提供的一种无线通信系统的架构示意图；
图2为本申请实施例中提供的一种竞争性的随机接入过程的信令示意图；
图3为本申请实施例中提供的一种随机接入方法的流程示意图；
图4为本申请实施例中提供的一种随机接入方法的信令示意图；
图5为本申请实施例中提供的一种随机接入装置的程序模块示意图；
图6为本申请实施例中提供的另一种随机接入装置的程序模块示意图；
图7为本申请实施例中提供的一种电子设备的硬件结构示意图。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
本申请实施例可以应用于各种通信系统，例如：先进的长期演进(Advanced long term evolution，LTE-A)系统、新无线(New Radio，NR) 系统、NR系统的演进系统、免授权频谱上的LTE(LTE-based access to unlicensed spectrum，LTE-U)系统、免授权频谱上的NR(NR-based access to unlicensed spectrum，NR-U)系统、通用移动通信系统(Universal Mobile Telecommunication System，UMTS)、无线局域网(Wireless Local Area Networks，WLAN)、无线保真(Wireless Fidelity，WiFi)、下一代通信系统或其他通信系统等。
通常来说，传统的通信系统支持的连接数有限，也易于实现，然而，随着通信技术的发展，移动通信系统将不仅支持传统的通信，还将支持例如，设备到设备(Device to Device，D2D)通信，机器到机器(Machine to Machine，M2M)通信，机器类型通信(Machine Type Communication，MTC)，以及车辆间(Vehicle to Vehicle，V2V)通信等，本申请实施例也可以应用于这些通信系统。
可选地，本申请实施例中的通信系统可以应用于载波聚合(Carrier Aggregation，CA)场景，也可以应用于双连接(Dual Connectivity，DC)场景，还可以应用于独立(Standalone，SA)布网场景。
本申请实施例对应用的频谱并不限定。例如，本申请实施例可以应用于授权频谱，也可以应用于免授权频谱。
参照图1，图1为本申请实施例提供的一种无线通信系统的架构示意图。本实施例提供的无线通信系统包括UE101和网络设备102。
可选的，UE101可以为指各种形式的用户设备、接入终端、用户单元、用户站、移动站、移动台(mobile station，简称MS)、远方站、远程终端、移动设备、终端设备(terminal equipment)、无线通信设备、用户代理或用户装置。还可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol，简称SIP)电话、无线本地环路(Wireless Local Loop，简称WLL)站、掌上电脑(Personal Digital Assistant，简称PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，未来5G网络中的终端设备或者未来演进的公用陆地移动通信网络(Public Land Mobile Network，简称PLMN)中的终端设备等，本申请实施例对此并不限定，只要该UE101能够与网络设备102无线通信即可。
可选的，网络设备102即公用移动通信网络设备，是UE101接入互联网的接口设备，也是无线电台站的一种形式，是指在一定的无线电覆盖区中，与UE101之间进行信息传递的无线电收发信电台，包括基站(Base Station，简称BS)，也可称为基站设备，是一种部署在无线接入网(Radio Access Network，RAN)用以提供无线通信功能的装置。例如在2G网络中提供基站功能的设备包括基地无线收发站(Base Transceiver Station，简称BTS)，3G网络中提供基站功能的设备包括节点B(NodeB)，在4G网络中提供基站功能的设备包括演进的节点B(evolved NodeB，eNB)，在无线局域网络(Wireless Local Area Networks，简称WLAN)中，提供基站功能的设备为接入点(Access Point，简称AP)，5G NR中的提供基站功能的设备gNB,以及继续演进的节点B(ng-eNB)，其中gNB和UE之间采用NR技术进行通信，ng-eNB和UE之间采用演进的通用陆地无线接入网络(Evolved Universal Terrestrial Radio Access,简称E-UTRA)技术进行通信，gNB和ng-eNB均可连接到5G核心网。本申请实施例中的网络设备102还包含在未来新的通信系统中提供基站功能的设备等。
本申请实施例定义接入网到UE的单向通信链路为下行链路，在下行链路上传输的数据为下行数据，下行数据的传输方向称为下行方向；而UE到接入网的单向通信链路为上行链路，在上行链路上传输的数据为上行数据，上行数据的传输方向称为上行方向。
在一种可行的实施方式中，网络设备可以通过下行控制信息(Downlink Control Information，简称DCI)向UE发送上行调度信息(UL Grant)，指示上行物理共享信道(Physical Uplink Shared Channel，简称PUSCH)传输，以便UE发送数据。
其中，UE接入网络时，需要发起随机接入取得上行同步。处于连接态的UE，在某些场景也需要发起随机接入，如当上行失步时，UE如果有上行数据要传输，则UE需要发起竞争性的随机接入(Contention based Random Access Procedure)；当上行失步时，如果基站需要向UE发送数据，基站可以通过物理下行控制信令触发UE执行随机接入(竞争的或非竞争的随机接入)；当UE发送达到预设门限次数的调度请求之后，如果基站还没有向UE发送UL Grant，UE需要触发竞争性的随机接入。
参照图2，图2为本申请实施例中提供的一种竞争性的随机接入过程的信令示意图，在一些实施例中，上述竞争性的随机接入过程包括：
第1步：UE随机选择一个前导码(preamble)，在物理随机接入信道(Physical Random Access Channel，简称PRACH)上发送。即发送Msg1：随机接入前导码(Random Access Preamble)。
第2步：UE接收网络设备发送的随机接入响应(Random Access Response，简称RAR)，即Msg2。
第3步：UE依据RAR中包含的上行资源发送调度传输信息(Scheduled Transmission)，即Msg3。
其中，当UE初始接入网络时，MSG3包含RRC连接请求；当UE实施切换时，MSG3包含切换完成消息。
第4步：UE若接收到冲突解决信息(Contention Resolution)，即Msg4，则认为冲突解决成功，随机接入过程成功，如果在一定时间内没有收到基站的调度，则认为冲突解决失败。
在5G中，因为5G会在高频部署，无线信号在高频呈现出方向性好、路损大的特点，一个大的服务小区需要多个波束(Beam)才能实现完整的覆盖，一个波束只能覆盖有限的范围。小的服务小区可以只包含一个波束。对于由多个波束构成的服务小区，由于硬件的限制，不是所有的波束均可以在同一时间进行传输，需要进行分时传输，即波束扫描(Beam sweeping)。
UE在开展随机接入时，需要首先确认自己所处的信号强度最强的Beam，即所测得服务小区的最强同步信号块，按照该同步信号块所对应的随机接入时机(RACH-Occasion，简称RO)选择相应的Preamble，发起随机接入流程。然后依据该同步信号块的接收特性接收RAR。
在NR中，以传输配置标识(Transmission Configuration Indicator，TCI)表征波束的传输特性，如多普勒频移、时延等，UE以信号强度最强的Beam的TCI在一个时间窗口内接收RAR，即UE在检测RAR时认为解调参考信号DMRS与信号最强的Beam(不同SSB索引对应不同的Beam)是高斯共存的(quasi co-location properties)。
其中，在NR R18版本中，需要考虑覆盖增强场景下的随机接入流程，对于利用多个Beam开展随机接入，基站需要合并接收UE针对多个Beam 发送的Preamble，UE可能发送相同的Preamble，也可能发送不同的Preamble。如果基站不实施合并接收，UE针对不同Beam发送不同的Preamble；如果基站要实施合并接收，UE发送相同的Preamble。然而UE是针对不同的Beam发送Preamble，基站如何选择最合适的Beam，即UE所测的信号强度最强Beam发送RAR是目前亟需解决的技术问题。
另外，当网络设备接收到UE采用多个不同的波束发送的Preamble时，若也采用这多个不同的波束向UE发送RAR，则发送的RAR可能会在时域上重叠，UE同时接收以不同波束发送的RAR，对UE的处理复杂度要求很高，同时网络设备采用多个波束发送RAR也会造成传输资源的浪费，且在信号条件不好的波束发送RAR，传输失败的概率较大。
为了解决上述技术问题，本申请实施例提供了一种随机接入方法，UE针对多个第一波束分别向网络设备发送目标前导码，该目标前导码为上述多个第一波束中信号强度最强的目标波束对应的前导码；网络设备在接收到目标前导码后，根据前导码与波束之间的对应关系，即可确定出目标前导码对应的目标波束，进而可以利用信号强度最强的目标波束向UE发送RAR。下面采用详细的实施例进行详细说明。
参照图3，图3为本申请实施例中提供的一种随机接入方法的流程示意图。在一些实施例中，该随机接入方法可以应用于UE中。
可选的，上述随机接入方法可以由UE执行，也可以由UE中的芯片或者特定模块来执行。
上述随机接入方法包括：
S301、针对多个第一波束分别向网络设备发送目标前导码，所述目标前导码为所述多个第一波束中信号强度最强的目标波束对应的前导码。
在一些实施例中，一个服务小区通常由4个BWP构成，其中初始BWP(Initial BWP)为Bandwidth Part 0，处于空闲态/非激活态的UE驻留在该BWP上，基站在该BWP上发送系统消息(System Information，简称SI)、寻呼消息。其中，SI通常指示适用于初始BWP的随机接入资源，随机接入可用的前导码Preamble(此处假定有64个Preamble)、随机接入的时频位置等，系统消息中还指示初始BWP的带宽(如20MHz)。
在一些实施例中，一个服务小区可以有16个波束(Beam)，Beam index 为Beam index 0～Beam index 15(即同步信号块SSB0～SSB15)。随机接入配置中指示了不同Beam所对应的随机接入时机RO、以及不同Beam所对应的Preamble。
在一些实施例中，UE可以预先测量当前驻留的服务小区中各个波束的信号强度，在开展随机接入流程时，从多个波束中选择出信号强度排序靠前的第一波束。排序靠前的第一波束可以是严格按照UE所测得的波束的信号强度排序的前若干个波束，如信号强度最强的波束1、次强的波束2；也可以是包含UE所测得的最强波束与其他非次强波束，如UE测得信号最强的波束是波束2，次强的波束是波束4，排名第三的波束是波束3，排名第四的波束5，UE按照信号强度排序选择出排序靠前的第一波束可以包括波束2和波束3，或者选择的排序靠前的第一波束可以是波束2、波束3和波束5。需要说明的是，对于一种覆盖等级，UE需要获知相应的Preamble的传输次数即针对多个Beam需要传输的次数；假定有两种覆盖等级，UE测得的SSB接收信号强度处于[-104dbm到-108dbm]时需要传输8次，这对应覆盖等级一；UE测得SSB接收信号强度处于[-108dbm到-112dbm]时需要传输16次。具体设置几种覆盖等级，可以由网络设备设置。UE依据自己所测得SSB的信号强度，按照排序靠前(最高)的SSB的RSRP确定自己所处的覆盖等级，然后按照相应的Preamble的传输次数进行随机接入流程。当UE针对多个波束开展随机接入时，UE从排序靠前(最强的几个)的波束中确定第一波束。
其中，当第一波束的数量为多个时，从多个第一波束中确定出信号强度最强的目标波束；并且在该目标波束对应的多个Preamble中随机选择一个作为目标Preamble。
在执行随机接入时，UE针对各个第一波束分别向网络设备发送目标Preamble是指，UE在各个第一波束对应的RO分别向网络设备发送目标Preamble。
S302、接收网络设备发送的随机接入响应。
在一些实施例中，网络设备在接收到UE发送的目标Preamble时，根据预先设置的前导码与波束之间的对应关系，即可确定出上述目标前导码对应的目标波束。
其中，网络设备在确定出上述目标前导码对应的目标波束后，利用该目标波束向UE发送RAR。
在一些实施例中，UE在准确接收了自己的RAR之后，按照RAR中指示的上行传输资源发送MSG3；之后，UE接收网络设备发送的MSG4，并成功解析MSG4之后，随机接入成功。
可选的，MSG3可以多次发送。
在一些实施例中，在RAR中可以指示MSG3发送的次数。
在一些实施例中，UE可以针对各个第一波束分别向网络设备发送MSG3，并接收网络设备利用上述目标波束发送的MSG4。或者，UE也可以针对上述目标波束向网络设备发送MSG3，并接收网络设备利用上述目标波束发送的MSG4。
本申请实施例所提供的随机接入方法，UE针对多个第一波束分别向网络设备发送目标前导码，该目标前导码为上述多个第一波束中信号强度最强的目标波束对应的前导码；网络设备在接收到目标前导码后，根据前导码与波束之间的对应关系，即可确定出目标前导码对应的目标波束，进而可以利用信号强度最强的目标波束向UE发送RAR，不仅降低了UE和网络设备的处理复杂度，还提升了随机接入的成功率
基于上述实施例中描述的内容，在一些实施例中，上述多个第一波束可以为UE当前驻留的服务小区按信号强度由强到弱排序的前若干个波束。
上述随机接入方法包括：
步骤1、确定UE当前驻留的服务小区按信号强度由强到弱排序的前若干个(最强的几个)第一波束，以及所述多个第一波束中信号强度最强的目标波束；在所述目标波束对应的多个前导码中选择一个前导码作为目标前导码。
在一些实施例中，第一波束的个数可以由网络设备配置。
步骤2、针对多个第一波束分别向网络设备发送目标前导码。
步骤3、接收所述网络设备发送的随机接入响应。
可选的，UE可以在上述目标波束上接收所述随机接入响应，或者在上述目标波束上连续接收所述随机接入响应。
示例性的，假设UE当前驻留的服务小区中，测量得到按信号强度由 强到弱排序的前3个波束为Beam index3、Beam index4及Beam index6，其中，Beam index4为这3个波束中信号强度最强的波束。
UE在开展针对多个Beam的随机接入流程时，为了使网络设备能够从UE发送的Preamble中获知UE所处的最强Beam，UE选择自身所处的Beam index4所对应的Preamble。比如Beam index4对应的Preamble有Preamble17、Preamble18、Preamble19、Preamble20共4个，UE可以随机选择其中的任何一个。假设UE选择Preamble18，则UE在所测得的3个波束(Beam index3、Beam index4及Beam index6)所对应的RO上发送Preamble18。
可选的，UE可以发送多次Preamble18(如每次均在Beam index3、Beam index4及Beam index6对应的RO上发送3次)，上述发送次数取决于系统消息的配置，比如服务小区可以按照UE所测得的服务小区的信号质量RSRP设定需要发送的次数。
在一些实施例中，网络设备合并接收UE在Beam index3、Beam index4及Beam index6对应的RO上发送的Preamble 18。
假设网络设备准确解析了UE发送的Preamble 18，则网络设备依据Beam index与Preamble之间的对应关系，可以推断出Preamble18是Beam index4所对应的，由此网络设备可以确定出UE所处的最强Beam是Beam index4，此时，网络设备即可在该Beam上向UE发送随机接入响应。
在一些实施例中，UE在发送了多次Preamble18之后，如在时隙n发送结束，则UE可以按照系统消息中的设置，在相应的时隙如时隙n+3开始接收随机接入响应。
在一些实施例中，UE依据自己所处的最强Beam，按照Beam index4的TCI接收随机接入响应，UE可能需要连续接收多次随机接入响应，才能合并解析获得正确的内容。如UE需要在连续多个时隙接收随机接入响应，然后进行合并，才能顺利解析出随机接入响应。连续接收的次数可以由系统消息设置，如在时隙n发送Preamble结束之后，在时隙n+3之后连续接收8次RAR。
或者，UE在接收随机接入响应时，接收随机接入响应时的DMRS与上述目标波束是高斯共存的(quasi co-location properties)。
另外，UE可以按照Preamble18(即Beam index 4)对应RO计算获得RA-RANTI，并依据该RA-RNTI接收随机接入响应。避免UE在接收RAR时因为不同Beam对应的RO计算出的RA-RNTI不同导致接收混乱。
本申请实施例所提供的随机接入方法，可以充分利用现有的随机接入配置，使得网络设备能够识别UE所处的信号强度最强的Beam，然后在该Beam发送RAR，从而提升了RAR传输的成功率。
基于上述实施例中描述的内容，在本申请一些实施例中，还提供了一种随机接入方法，应用于网络设备中，该方法包括：
步骤一、分别接收UE针对多个第一波束发送的目标前导码。
步骤二、根据前导码与波束之间的对应关系，确定所述目标前导码对应的目标波束。
步骤三、利用所述目标波束向所述UE发送随机接入响应。
为了更好的理解本申请实施例，参照图4，图4为本申请实施例中提供的一种随机接入方法的信令示意图。
在一种可行的实施方式中，上述随机接入方法包括：
401.UE确定当前驻留的服务小区按信号强度由强到弱排序的前若干个第一波束，以及多个第一波束中信号强度最强的目标波束。
402.UE在目标波束对应的多个前导码中选择一个前导码作为目标前导码。
403.UE针对多个第一波束分别向网络设备发送目标前导码。
404.网络设备根据前导码与波束之间的对应关系，确定目标前导码对应的目标波束。
405.网络设备利用目标波束向UE发送随机接入响应。
本申请实施例所提供的随机接入方法，UE针对信号强度由强到弱排序的前若干个第一波束分别向网络设备发送目标前导码，该目标前导码为上述多个第一波束中信号强度最强的目标波束对应的前导码；网络设备在接收到目标前导码后，根据前导码与波束之间的对应关系，即可确定出目标前导码对应的目标波束，进而可以利用信号强度最强的目标波束向UE发送RAR，不仅降低了UE和网络设备的处理复杂度，还提升了随机接入的成功率。
基于上述实施例中所描述的内容，本申请实施例中还提供一种随机接入装置，应用于用户设备。参照图5，图5为本申请实施例中提供的一种随机接入装置的程序模块示意图，该随机接入装置50包括：
发送模块501，用于针对多个第一波束分别向网络设备发送目标前导码，所述目标前导码为所述多个第一波束中信号强度最强的目标波束对应的前导码。
接收模块502，用于接收所述网络设备发送的随机接入响应。
在一种可行的实施方式中，接收模块502用于：
在所述目标波束上接收所述随机接入响应，或者在所述目标波束上连续接收所述随机接入响应。
在一种可行的实施方式中，所述多个第一波束为所述UE当前驻留的服务小区按信号强度由强到弱排序的前若干个波束。
在一种可行的实施方式中，还包括确定模块，用于：
确定所述UE当前驻留的服务小区按信号强度由强到弱排序的前若干个第一波束，以及所述若干个第一波束中信号强度最强的目标波束；在所述目标波束对应的多个前导码中选择一个前导码作为所述目标前导码。
在一种可行的实施方式中，发送模块501具体用于：
按照所述目标前导码的发送次数，在各个所述第一波束对应的RO上分别发送所述目标前导码；其中，所述目标前导码的发送次数由所述服务小区的系统消息确定。
在一种可行的实施方式中，接收所述随机接入响应时的DMRS与所述目标波束是高斯共存的。
在一种可行的实施方式中，接收模块502具体用于：
按照所述目标波束对应的RO确定RA-RNTI；根据所述RA-RNTI，接收所述网络设备利用所述目标波束发送的所述随机接入响应。
需要说明的是，本申请实施例中的发送模块501、接收模块502具体执行的内容与上述实施例中描述的随机接入方法中UE执行的各个步骤相关，具体可以参阅上述实施例中描述的内容，此处不做赘述。
基于上述实施例中所描述的内容，本申请实施例中还提供了另一种随机接入装置，应用于网络设备。参照图6，图6为本申请实施例中提供的 另一种随机接入装置的程序模块示意图，该随机接入60包括：
接收模块601，用于分别接收UE针对多个第一波束发送的目标前导码。
确定模块602，用于根据前导码与波束之间的对应关系，确定所述目标前导码对应的目标波束。
发送模块603，用于利用所述目标波束向所述UE发送随机接入响应。
需要说明的是，本申请实施例中的接收模块601、确定模块602及发送模块603具体执行的内容与上述实施例中描述的随机接入方法中网络设备执行的各个步骤相关，具体可以参阅上述实施例中描述的内容，此处不做赘述。
进一步的，基于上述实施例中所描述的内容，本申请实施例中还提供了一种用户设备，该用户设备包括至少一个处理器和存储器；其中，存储器存储计算机执行指令；上述至少一个处理器执行存储器存储的计算机执行指令，以实现如上述实施例中用户设备侧执行的步骤，本实施例此处不再赘述。
进一步的，基于上述实施例中所描述的内容，本申请实施例中还提供了一种网络设备，该网络设备包括至少一个处理器和存储器；其中，存储器存储计算机执行指令；上述至少一个处理器执行存储器存储的计算机执行指令，以实现如上述实施例中网络设备侧执行的步骤，本实施例此处不再赘述。
为了更好的理解本申请实施例，参照图7，图7为本申请实施例提供的一种电子设备的硬件结构示意图。该电子设备可以为上述用户设备，也可以为上述网络设备。
如图7所示，本实施例的电子设备70包括：处理器701以及存储器702；其中：
存储器702，用于存储计算机执行指令；
处理器701，用于执行存储器存储的计算机执行指令，以实现上述实施例中用户设备所执行的各个步骤，具体可以参见前述方法实施例中的相关描述。
或者，处理器701，用于执行存储器存储的计算机执行指令，以实现 上述实施例中网络设备所执行的各个步骤，具体可以参见前述方法实施例中的相关描述。
可选地，存储器702既可以是独立的，也可以跟处理器701集成在一起。
当存储器702独立设置时，该设备还包括总线703，用于连接所述存储器702和处理器701。
进一步的，基于上述实施例中所描述的内容，本申请实施例中还提供了一种计算机可读存储介质，该计算机可读存储介质中存储有计算机执行指令，当处理器执行所述计算机执行指令时，以实现如上述实施例中用户设备侧执行的步骤。
进一步的，基于上述实施例中所描述的内容，本申请实施例中还提供了一种计算机可读存储介质，该计算机可读存储介质中存储有计算机执行指令，当处理器执行所述计算机执行指令时，以实现如上述实施例中网络设备侧执行的步骤。
进一步的，基于上述实施例中所描述的内容，本申请实施例中还提供了一种计算机程序产品，包括计算机程序，该计算机程序被处理器执行时，实现如上述实施例中用户设备侧执行的步骤；或者实现如上述实施例中网络设备侧执行的步骤。
应当理解的是，在本申请所提供的几个实施例中，应该理解到，所揭露的设备和方法，可以通过其它的方式实现。例如，以上所描述的设备实施例仅仅是示意性的，例如，所述模块的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个模块可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或模块的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的模块可以是或者也可以不是物理上分开的，作为模块显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部模块来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能模块可以集成在一个处理单元 中，也可以是各个模块单独物理存在，也可以两个或两个以上模块集成在一个单元中。上述模块成的单元既可以采用硬件的形式实现，也可以采用硬件加软件功能单元的形式实现。
上述以软件功能模块的形式实现的集成的模块，可以存储在一个计算机可读取存储介质中。上述软件功能模块存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)或处理器(英文：processor)执行本申请各个实施例所述方法的部分步骤。
应理解，上述处理器可以是中央处理单元(英文：Central Processing Unit，简称：CPU)，还可以是其他通用处理器、数字信号处理器(英文：Digital Signal Processor，简称：DSP)、专用集成电路(英文：Application Specific Integrated Circuit，简称：ASIC)等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合申请所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。
存储器可能包含高速RAM存储器，也可能还包括非易失性存储NVM，例如至少一个磁盘存储器，还可以为U盘、移动硬盘、只读存储器、磁盘或光盘等。
总线可以是工业标准体系结构(Industry Standard Architecture，ISA)总线、外部设备互连(Peripheral Component，PCI)总线或扩展工业标准体系结构(Extended Industry Standard Architecture，EISA)总线等。总线可以分为地址总线、数据总线、控制总线等。为便于表示，本申请附图中的总线并不限定仅有一根总线或一种类型的总线。
上述存储介质可以是由任何类型的易失性或非易失性存储设备或者它们的组合实现，如静态随机存取存储器(SRAM)，电可擦除可编程只读存储器(EEPROM)，可擦除可编程只读存储器(EPROM)，可编程只读存储器(PROM)，只读存储器(ROM)，磁存储器，快闪存储器，磁盘或光盘。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。
一种示例性的存储介质耦合至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息。当然，存储介质也可以是处理 器的组成部分。处理器和存储介质可以位于专用集成电路(Application Specific Integrated Circuits，简称：ASIC)中。当然，处理器和存储介质也可以作为分立组件存在于电子设备或主控设备中。
本领域普通技术人员可以理解：实现上述各方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成。前述的程序可以存储于一计算机可读取存储介质中。该程序在执行时，执行包括上述各方法实施例的步骤；而前述的存储介质包括：ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围。

Claims (14)

  1. 一种随机接入方法，其特征在于，应用于用户设备UE中，所述方法包括：
    针对多个第一波束分别向网络设备发送目标前导码，所述目标前导码为所述多个第一波束中信号强度最强的目标波束对应的前导码；
    接收所述网络设备发送的随机接入响应。
  2. 根据权利要求1所述的方法，其特征在于，所述接收所述网络设备发送的随机接入响应，包括：
    在所述目标波束上接收所述随机接入响应，或者在所述目标波束上连续接收所述随机接入响应。
  3. 根据权利要求1所述的方法，其特征在于，
    所述多个第一波束为所述UE当前驻留的服务小区按信号强度由强到弱排序的前若干个波束。
  4. 根据权利要求3所述的方法，其特征在于，所述针对多个第一波束分别向网络设备发送目标前导码之前，还包括：
    确定所述UE当前驻留的服务小区按信号强度由强到弱排序的前若干个第一波束，以及所述若干个第一波束中信号强度最强的目标波束；
    在所述目标波束对应的多个前导码中选择一个前导码作为所述目标前导码。
  5. 根据权利要求1或3所述的方法，其特征在于，所述针对多个第一波束分别向网络设备发送目标前导码，包括：
    使用所述目标前导码的发送次数，在各个所述第一波束对应的随机接入时机RO上分别发送所述目标前导码；其中，所述目标前导码的发送次数由所述服务小区的系统消息确定。
  6. 根据权利要求1所述的方法，其特征在于，接收所述随机接入响应时的解调参考信号DMRS与所述目标波束是高斯共存的。
  7. 根据权利要求1所述的方法，其特征在于，所述接收所述网络设备发送的随机接入响应，包括：
    按照所述目标波束对应的RO确定随机接入无线网络临时标识RA-RNTI；
    根据所述RA-RNTI，接收所述网络设备发送的所述随机接入响应。
  8. 一种随机接入方法，其特征在于，应用于网络设备中，所述方法包括：
    分别接收用户设备UE针对多个第一波束发送的目标前导码；
    根据前导码与波束之间的对应关系，确定所述目标前导码对应的目标波束；
    利用所述目标波束向所述UE发送随机接入响应。
  9. 一种随机接入装置，其特征在于，应用于用户设备UE中，所述装置包括：
    发送模块，用于针对多个第一波束分别向网络设备发送目标前导码，所述目标前导码为所述多个第一波束中信号强度最强的目标波束对应的前导码；
    接收模块，用于接收所述网络设备发送的随机接入响应。
  10. 一种随机接入装置，其特征在于，应用于网络设备中，所述装置包括：
    接收模块，用于分别接收用户设备UE针对多个第一波束发送的目标前导码；
    确定模块，用于根据前导码与波束之间的对应关系，确定所述目标前导码对应的目标波束；
    发送模块，用于利用所述目标波束向所述UE发送随机接入响应。
  11. 一种用户设备，其特征在于，包括：至少一个处理器和存储器；
    所述存储器存储计算机执行指令；
    所述至少一个处理器执行所述存储器存储的计算机执行指令，使得所述至少一个处理器执行如权利要求1至7任一项所述的随机接入方法。
  12. 一种网络设备，其特征在于，包括：至少一个处理器和存储器；
    所述存储器存储计算机执行指令；
    所述至少一个处理器执行所述存储器存储的计算机执行指令，使得所述至少一个处理器执行如权利要求8所述的随机接入方法。
  13. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有计算机执行指令，当处理器执行所述计算机执行指令时，实现 如权利要求1至7任一项所述的随机接入方法；
    或者，当处理器执行所述计算机执行指令时，实现如权利要求8所述的随机接入方法。
  14. 一种计算机程序产品，包括计算机程序，其特征在于，所述计算机程序被处理器执行时，实现如权利要求1至7任一项所述的随机接入方法，或者实现如权利要求8所述的随机接入方法。
PCT/CN2023/087499 2022-04-14 2023-04-11 随机接入方法及设备 WO2023198022A1 (zh)

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