WO2022193972A1 - 前导码发送方法及装置、计算机可读存储介质 - Google Patents

前导码发送方法及装置、计算机可读存储介质 Download PDF

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Publication number
WO2022193972A1
WO2022193972A1 PCT/CN2022/079491 CN2022079491W WO2022193972A1 WO 2022193972 A1 WO2022193972 A1 WO 2022193972A1 CN 2022079491 W CN2022079491 W CN 2022079491W WO 2022193972 A1 WO2022193972 A1 WO 2022193972A1
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Prior art keywords
ssb
candidate
preamble
preferred
prach time
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PCT/CN2022/079491
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English (en)
French (fr)
Inventor
胡炜
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展讯通信（上海）有限公司
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Publication of WO2022193972A1 publication Critical patent/WO2022193972A1/zh

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    • 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
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
    • 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
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • 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
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to the field of communication technologies, and in particular, to a method and device for sending a preamble, and a computer-readable storage medium.
  • a user equipment When a user equipment (User Equipment, UE for short) initiates random access in the fifth-generation mobile communication technology (The Fifth-Generation mobile communications, 5G) mode, it sends a random access preamble (preamble).
  • All random access opportunity (Random Access Occasion, RO for short) positions that can be used are configured by the network through system messages. But in the end which RO positions can be used to send the preamble depends on the current strongest synchronization signal block (Synchronization Signal/Physical Broadcast Channel Block, referred to as SS/PBCH BLOCK, that is, SSB) index (referred to as SSB index)
  • SSB index Synchrononization Signal/Physical Broadcast Channel Block
  • the determination and network configuration The mapping relationship between the SSB and RO locations.
  • the index of the strongest SSB may also change, which affects the final selection of the RO location of the UE.
  • the UE When the time slot (slot) where the finally selected RO is located does not have enough uplink symbols (symbols) for sending the preamble, the UE will always be unable to initiate access because there are no uplink resources, seriously reducing the chance of successful access. .
  • the technical problem solved by the present invention is how to increase the chance of successful access during random access.
  • an embodiment of the present invention provides a method for sending a preamble, including: selecting a preferred SSB according to channel quality, and determining a preferred RO position corresponding to the preferred SSB according to a preset mapping relationship between the SSB and the candidate RO position; Judging whether the PRACH time slot where the preferred RO position is located contains enough uplink symbols; if the judgment result shows that the uplink symbols contained in the PRACH time slot are insufficient, then select an alternative RO position in other PRACH time slots according to the channel quality, wherein the said The other PRACH slots contain the candidate RO position and contain enough uplink symbols; the preamble is sent at the alternate RO position.
  • the judging whether the PRACH time slot where the preferred RO position is located contains enough uplink symbols includes: judging whether the uplink symbols contained in the PRACH time slot where the preferred RO position is located can carry the entire content of the preamble.
  • the selecting an alternative RO position according to the channel quality in other PRACH time slots includes: determining the candidate SSB corresponding to the candidate RO position included in the other PRACH time slot according to the preset mapping relationship between the SSB and the candidate RO position; The candidate SSB whose channel quality is higher than the preset threshold is determined as the substitute SSB; the substitute RO position corresponding to the substitute SSB is determined according to the preset mapping relationship between the SSB and the candidate RO position.
  • the determining the alternative RO position corresponding to the alternative SSB according to the preset mapping relationship between the SSB and the candidate RO position includes: when the preset mapping relationship between the SSB and the candidate RO position indicates that the alternative SSB corresponds to multiple When the candidate RO position is selected, the alternative RO position is randomly selected from the corresponding multiple candidate RO positions.
  • the preset threshold is determined according to the path loss, RSRP and signal-to-noise ratio of the PRACH, wherein different parameters correspond to different weight coefficients.
  • the preset mapping relationship between the SSB and the candidate RO position is determined based on a network configuration.
  • the channel quality is determined according to the measurement result of the SSB bitmap.
  • An embodiment of the present invention further provides a preamble sending apparatus, including: a first selection module, configured to select a preferred SSB according to channel quality, and determine a preferred RO corresponding to the preferred SSB according to a preset mapping relationship between the SSB and candidate RO positions Position; judgment module, for judging whether the PRACH time slot where the preferred RO position is located contains enough uplink symbols; the second selection module, if the judgment result shows that the uplink symbols contained in the PRACH time slot are insufficient, then in other PRACH time slots An alternative RO position is selected according to channel quality, wherein the other PRACH timeslots include the candidate RO position and include enough uplink symbols; a sending module is configured to send the preamble at the alternative RO position.
  • a preamble sending apparatus including: a first selection module, configured to select a preferred SSB according to channel quality, and determine a preferred RO corresponding to the preferred SSB according to a preset mapping relationship between the SSB and candidate RO positions Position; judgment module, for judging whether the PRACH
  • Embodiments of the present invention further provide a computer-readable storage medium, where the computer-readable storage medium is a non-volatile storage medium or a non-transitory storage medium, on which a computer program is stored, and the computer program is executed by a processor perform the steps of the above method.
  • the computer-readable storage medium is a non-volatile storage medium or a non-transitory storage medium, on which a computer program is stored, and the computer program is executed by a processor perform the steps of the above method.
  • An embodiment of the present invention further provides an apparatus for sending a preamble, including a memory and a processor, where the memory stores a computer program that can be run on the processor, and the processor executes the above method when the computer program runs A step of.
  • An embodiment of the present invention provides a method for sending a preamble, including: selecting a preferred SSB according to channel quality, and determining a preferred RO position corresponding to the preferred SSB according to a preset mapping relationship between the SSB and candidate RO positions; judging the preferred RO position Whether the PRACH time slot in which it is located contains enough uplink symbols; if the judgment result indicates that the uplink symbols contained in the PRACH time slot are insufficient, select a substitute RO position in other PRACH time slots according to the channel quality, wherein the other PRACH time slots contain all the the candidate RO position and contains enough uplink symbols; the preamble is sent at the alternative RO position.
  • the RO position for sending the preamble is determined, resulting in the emergence of the preferred RO corresponding to the strongest SSB index (ie the preferred SSB).
  • the PRACH time slot where the location is located does not have enough uplink symbols to send the preamble, the UE will always be unable to initiate the technical solution of random access.
  • the solution of the present application can increase the chance of successful access during the random access process.
  • the solution of the present application increases the successful reception of the UE in the above situation by querying whether there are other PRACH time slots that can meet the preamble transmission requirements, and temporarily ignoring the mapping relationship between SSB and RO positions. entry opportunity.
  • temporarily ignoring the mapping relationship between the SSB and the RO position can be understood as discarding the preferred RO position corresponding to the preferred SSB, and instead looking for an alternative RO position whose PRACH time slot contains enough uplink symbols.
  • the candidate SSB corresponding to the candidate RO position included in the other PRACH time slots determines the candidate SSB whose channel quality is higher than the preset threshold as the replacement SSB; according to the SSB and The preset mapping relationship of the candidate RO locations determines the substitute RO location corresponding to the substitute SSB.
  • the channel quality of the SSB corresponding to the substitute RO position is higher than the preset threshold, so that the preamble sent at the substitute RO position can be successfully transmitted to the base station.
  • FIG. 1 is a flowchart of a method for sending a preamble according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of an apparatus for sending a preamble according to an embodiment of the present invention.
  • the RO position actually used for preamble transmission will change with the change of the finally selected SSB index, and the configuration of the uplink and downlink time slots of NR is very flexible.
  • PRACH Physical Random Access Channel
  • time slot where the RO position corresponding to the changed SSB index is located does not have enough uplink symbols, for example, the selected RO position is just at 2 milliseconds (ms) of data
  • DDS Data Distribution Service
  • a UE in the prior art when a UE in the prior art sends a preamble to initiate random access, it will first determine all RO locations (ie, candidate RO locations) that can be used to send preambles according to network configuration parameters, including time domain locations and frequency domain locations. Domain location. Then the UE will measure according to the SSB bitmap (bitmap) delivered by the network to see which SSB indices can be detected. Then, an SSB index that meets the threshold requirement is found among the detected SSBs as the preferred SSB for sending the preamble. Since the cell has specified the mapping relationship between each SSB and the candidate RO position in the access rule, when the UE selects the preferred SSB, it is equivalent to limiting the RO position that can be used for transmission.
  • bitmap bitmap
  • the UE using the existing technology can only send the preamble at the RO position corresponding to the optimal SSB.
  • the error tolerance rate is low, which seriously reduces the successful access. Chance.
  • an embodiment of the present invention provides a method for sending a preamble, including: selecting a preferred SSB according to channel quality, and determining a preferred RO position corresponding to the preferred SSB according to a preset mapping relationship between the SSB and the candidate RO position; Judging whether the PRACH time slot where the preferred RO position is located contains enough uplink symbols; if the judgment result shows that the uplink symbols contained in the PRACH time slot are insufficient, then select an alternative RO position in other PRACH time slots according to the channel quality, wherein the said The other PRACH slots contain the candidate RO position and contain enough uplink symbols; the preamble is sent at the alternate RO position.
  • the solution of the present application can increase the chance of successful access during the random access process. Specifically, when the above situation occurs, the solution of the present application increases the successful reception of the UE in the above situation by querying whether there are other PRACH time slots that can meet the preamble transmission requirements, and temporarily ignoring the mapping relationship between SSB and RO positions. entry opportunity. Wherein, temporarily ignoring the mapping relationship between the SSB and the RO position can be understood as discarding the preferred RO position corresponding to the preferred SSB, and instead looking for an alternative RO position whose PRACH time slot contains enough uplink symbols.
  • FIG. 1 is a flowchart of a method for sending a preamble according to an embodiment of the present invention.
  • This embodiment may be performed by the user equipment side, for example, by the UE on the user equipment side.
  • This embodiment can be applied to a random access scenario, such as a random access scenario using the NR technology.
  • the preamble method provided in the following steps S101 to S104 may be executed by a chip with a random access function in the user equipment, or may be executed by a baseband chip in the user equipment.
  • the method for sending a preamble may include the following steps:
  • Step S101 select a preferred SSB according to the channel quality, and determine the preferred RO position corresponding to the preferred SSB according to the preset mapping relationship between the SSB and the candidate RO position;
  • Step S102 judge whether the PRACH time slot where the preferred RO position is located contains enough uplink symbols
  • step S103 is executed, that is, a replacement RO position is selected in other PRACH time slots according to the channel quality.
  • the slot contains the candidate RO positions and contains enough upstream symbols.
  • step S104 is also performed, that is, the preamble is sent at the substitute RO position.
  • step S105 is executed, that is, the preamble is sent at the preferred RO position.
  • the preamble sending process described in this embodiment may be triggered and executed after the physical (Physical, PHY) layer of the UE receives the random access request.
  • step S101 it may further include the step of acquiring all available RO positions, that is, candidate RO positions. For example, all candidate RO locations are determined according to network configuration parameters.
  • the channel quality may be determined according to the measurement result of the SSB bitmap.
  • step S101 the SSB with the strongest channel quality among all the measured SSBs may be determined as the preferred SSB.
  • the channel quality of the preferred SSB is higher than a preset threshold.
  • the preset threshold may be determined according to the path loss of the PRACH, the reference signal received power (Reference Signal Received Power, RSRP for short), and the signal-to-noise ratio.
  • the above three parameters may correspond to different weight coefficients respectively, and the preset threshold is obtained by weighting the respective corresponding weight coefficients. The specific value of each weight coefficient can be comprehensively determined according to the ease of decoding.
  • the preset mapping relationship between the SSB and the candidate RO position may be determined based on the network configuration.
  • the preset mapping relationship may be used to indicate the corresponding relationship between the SSB index and the candidate RO positions.
  • the SSB index and the candidate RO position may have a one-to-one correspondence, and may also be a many-to-one or one-to-many mapping relationship.
  • one candidate RO position may be randomly selected as the preferred RO position.
  • the step S102 may include the step of: judging whether the uplink symbol included in the PRACH time slot where the preferred RO position is located can carry the entire content of the preamble.
  • step S103 and step S104 are performed.
  • the preferred RO position selected according to the strongest SSB index does not have enough uplink symbols for sending the preamble, as long as there are other PRACH time slots in the current cell and the time slot has enough uplink symbols for sending the preamble . Then, the preamble is directly sent at the RO position on the other PRACH timeslot, so as to increase the chance of successful access.
  • the other PRACH timeslots may refer to other PRACH timeslots including candidate RO positions except the PRACH timeslot where the preferred RO position is located.
  • the candidate RO positions and the preferred RO positions included in other PRACH time slots may correspond to the same SSB, that is, both correspond to the preferred SSB selected in step S101.
  • step S101 If the judgment result of performing step S102 shows that the uplink symbols in the time slot 18 are not enough to send the preamble, all the candidate RO positions in the time slot 18 are discarded, and the UE uses the candidate RO position in the time slot 19 as the substitute RO position to send the preamble. .
  • the candidate RO positions and the preferred RO positions included in other PRACH time slots may correspond to different SSBs.
  • an appropriate alternative RO position can be selected according to the channel quality of the SSB corresponding to the candidate RO position included in other PRACH time slots, so as to further increase the probability of successful access.
  • step S103 may include the steps of: determining the candidate SSB corresponding to the candidate RO position included in the other PRACH time slots according to the preset mapping relationship between the SSB and the candidate RO position; The candidate SSB is determined as the substitute SSB; the substitute RO position corresponding to the substitute SSB is determined according to the preset mapping relationship between the SSB and the candidate RO location.
  • the channel quality of the SSB corresponding to the substitute RO position is higher than the preset threshold, so that the preamble sent at the substitute RO position can be successfully transmitted to the base station.
  • the candidate SSB with the best channel quality among them may be determined as a substitute SSB.
  • the alternative RO position may be randomly selected from the corresponding multiple candidate RO positions.
  • an alarm message is sent to indicate that the preamble cannot be sent.
  • the action of sending the alarm information can be performed when the access does not time out, so as to improve the response efficiency of the UE.
  • the chance of successful access can be increased when the random access process is performed.
  • the solution of the present application increases the successful reception of the UE in the above situation by querying whether there are other PRACH time slots that can meet the preamble transmission requirements, and temporarily ignoring the mapping relationship between SSB and RO positions. entry opportunity.
  • temporarily ignoring the mapping relationship between the SSB and the RO position can be understood as discarding the preferred RO position corresponding to the preferred SSB, and instead looking for an alternative RO position whose PRACH time slot contains enough uplink symbols.
  • FIG. 2 is a schematic structural diagram of an apparatus for sending a preamble according to an embodiment of the present invention.
  • the apparatus for sending a preamble in this embodiment can be used to implement the method and technical solution described in the embodiment shown in FIG. 1 above.
  • the apparatus 2 for sending a preamble may include: a first selection module 21, configured to select a preferred SSB according to channel quality, and determine the preferred SSB according to the preset mapping relationship between the SSB and the candidate RO position The preferred RO position corresponding to the preferred SSB; the judgment module 22 is used to judge whether the PRACH time slot where the preferred RO position is located contains enough uplink symbols; the second selection module 23, if the judgment result indicates that the uplink symbols contained in the PRACH time slot If it is insufficient, then select an alternative RO position in other PRACH time slots according to the channel quality, wherein the other PRACH time slots include the candidate RO position and include enough uplink symbols; the sending module 24 is configured to send at the alternative RO position the preamble.
  • a first selection module 21 configured to select a preferred SSB according to channel quality, and determine the preferred SSB according to the preset mapping relationship between the SSB and the candidate RO position The preferred RO position corresponding to the preferred SSB
  • the judgment module 22 is used to judge whether the PRACH
  • the above-mentioned preamble sending apparatus may correspond to a chip with a random access function in a user equipment, or a chip with a data processing function, such as a system-on-a-chip (System-On-a-Chip, SOC for short) , baseband chip, etc.; or it corresponds to a chip module including a chip with random access function in the user equipment; or corresponds to a chip module with a data processing function chip, or corresponds to a user equipment.
  • a chip with a random access function in a user equipment or a chip with a data processing function, such as a system-on-a-chip (System-On-a-Chip, SOC for short) , baseband chip, etc.
  • SOC System-On-a-Chip
  • each module/unit included in each device and product described in the above embodiments it may be a software module/unit, a hardware module/unit, or a part of a software module/unit, a part of which is a software module/unit. is a hardware module/unit.
  • each module/unit included therein may be implemented by hardware such as circuits, or at least some of the modules/units may be implemented by a software program.
  • Running on the processor integrated inside the chip the remaining (if any) part of the modules/units can be implemented by hardware such as circuits; for each device and product applied to or integrated in the chip module, the modules/units contained therein can be They are all implemented by hardware such as circuits, and different modules/units can be located in the same component of the chip module (such as chips, circuit modules, etc.) or in different components, or at least some of the modules/units can be implemented by software programs.
  • the software program runs on the processor integrated inside the chip module, and the remaining (if any) part of the modules/units can be implemented by hardware such as circuits; for each device and product applied to or integrated in the terminal, each module contained in it
  • the units/units may all be implemented in hardware such as circuits, and different modules/units may be located in the same component (eg, chip, circuit module, etc.) or in different components in the terminal, or at least some of the modules/units may be implemented by software programs Realization, the software program runs on the processor integrated inside the terminal, and the remaining (if any) part of the modules/units can be implemented in hardware such as circuits.
  • An embodiment of the present invention further provides a computer-readable storage medium, where the computer-readable storage medium is a non-volatile storage medium or a non-transitory storage medium, on which a computer program is stored, and the computer program is executed by a processor
  • the storage medium may include a computer-readable storage medium such as a non-volatile memory or a non-transitory memory.
  • the storage medium may include ROM, RAM, magnetic or optical disks, and the like.
  • An embodiment of the present invention further provides another apparatus for sending a preamble, including a memory and a processor, where the memory stores a computer program that can run on the processor, and the processor executes the computer program when the processor runs the computer program.
  • FIG. 1 corresponds to the steps of the method for sending a preamble provided by the embodiment.
  • the technical solution of the present invention can be applied to 5G (5 generation) communication systems, 4G and 3G communication systems, and various communication systems that will evolve later, such as 6G and 7G.
  • the technical solution of the present invention is also applicable to different network architectures, including but not limited to relay network architectures, dual-link architectures, and Vehicle-to-Everything (vehicle-to-anything communication) architectures.
  • the 5G CN described in the embodiments of this application may also be referred to as a new core network (new core), or 5G NewCore, or a next generation core network (next generation core, NGC), or the like.
  • 5G-CN is set up independently of an existing core network, such as an evolved packet core (EPC).
  • EPC evolved packet core
  • a base station (base station, BS) in the embodiments of the present application which may also be referred to as base station equipment, is a device deployed in a wireless access network to provide a wireless communication function.
  • the devices that provide base station functions in 2G networks include base transceiver stations (BTS) and base station controllers (BSCs).
  • the devices that provide base station functions in 3G networks include Node B (NodeB) and wireless
  • the network controller radio network controller, RNC
  • the equipment that provides the base station function in the 4G network includes the evolved NodeB (evolved NodeB, eNB), in the wireless local area network (wireless local area network, WLAN), the device that provides the base station function
  • the equipment is an access point (AP)
  • the equipment that provides base station functions in 5G New Radio (NR) includes the continuously evolving Node B (gNB), and the equipment that provides base station functions in new communication systems in the future Wait.
  • the terminal in the embodiments of this application may refer to various forms of user equipment (user equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station (mobile station, MS), remote station, remote terminal, Mobile equipment, user terminal, terminal equipment, wireless communication equipment, user agent or user equipment.
  • user equipment user equipment
  • MS mobile station
  • remote station remote terminal
  • Mobile equipment user terminal
  • terminal equipment wireless communication equipment
  • user agent user equipment
  • the terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in future 5G networks or future evolved Public Land Mobile Networks (PLMN)
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • a terminal device, etc. is not limited in this embodiment of the present application.
  • the embodiment of the present application defines the unidirectional communication link from the access network to the terminal as the downlink, the data transmitted on the downlink is the downlink data, and the transmission direction of the downlink data is called the downlink direction;
  • the unidirectional communication link is the uplink, the data transmitted on the uplink is the uplink data, and the transmission direction of the uplink data is called the uplink direction.
  • connection in the embodiments of the present application refers to various connection modes such as direct connection or indirect connection, so as to realize communication between devices, which is not limited in the embodiments of the present application.
  • Network and “system” appearing in the embodiments of this application express the same concept, and a communication system is a communication network.
  • the processor may be a central processing unit (central processing unit, CPU for short), and the processor may also be other general-purpose processors, digital signal processors (digital signal processor, DSP for short) , application specific integrated circuit (ASIC), off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically programmable Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • Volatile memory may be random access memory (RAM), which acts as an external cache.
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • SDRAM synchronous dynamic random access memory
  • DDR SDRAM double data rate synchronous dynamic random access memory
  • enhanced SDRAM enhanced synchronous dynamic random access memory
  • SLDRAM synchronous connection dynamic random access memory Fetch memory
  • direct memory bus random access memory direct rambus RAM, DR RAM
  • the above embodiments may be implemented in whole or in part by software, hardware, firmware or any other combination.
  • the above-described embodiments may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated.
  • the computer may be a general purpose computer, special purpose computer, computer network, or other programmable device.
  • the computer instructions may be stored in or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server or data center Transmission to another website site, computer, server or data center by wire (eg, infrared, wireless, microwave, etc.).
  • the computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, a data center, or the like that contains one or more sets of available media.
  • the usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, DVDs), or semiconductor media.
  • the semiconductor medium may be a solid state drive.
  • the size of the sequence numbers of the above-mentioned processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, and should not be dealt with in the embodiments of the present application. implementation constitutes any limitation.
  • the disclosed method, apparatus and system may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be physically included individually, or two or more units may be integrated into one unit.
  • the above-mentioned integrated unit may be implemented in the form of hardware, or may be implemented in the form of hardware plus software functional units.
  • the above-mentioned integrated units implemented in the form of software functional units can be stored in a computer-readable storage medium.
  • the above-mentioned software functional unit is stored in a storage medium, and includes several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute some steps of the methods described in the various embodiments of the present invention.
  • the aforementioned storage medium includes: U disk, mobile hard disk, Read-Only Memory (ROM for short), Random Access Memory (RAM for short), magnetic disk or CD, etc. that can store program codes medium.

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  • Mobile Radio Communication Systems (AREA)

Abstract

一种前导码发送方法及装置、计算机可读存储介质，所述方法包括：根据信道质量选择优选SSB，并根据SSB和候选RO位置的预设映射关系确定所述优选SSB对应的优选RO位置；判断所述优选RO位置所在PRACH时隙是否包含足够的上行符号；若判断结果表明所述PRACH时隙包含的上行符号不足，则在其他PRACH时隙根据信道质量选择替代RO位置，其中，所述其他PRACH时隙包含所述候选RO位置且包含足够的上行符号；在所述替代RO位置发送所述前导码。通过本发明方案能够在进行随机接入进程时增加成功接入机会。

Description

前导码发送方法及装置、计算机可读存储介质
本申请要求2021年3月19日提交中国专利局、申请号为202110298340.7、发明名称为“前导码发送方法及装置、计算机可读存储介质”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
本发明涉及通信技术领域，具体地涉及一种前导码发送方法及装置、计算机可读存储介质。
背景技术
根据现有协议相关规定，用户设备(User Equipment，简称UE)在第五代移动通信技术(The Fifth–Generation mobile communications，简称5G)模式下发起随机接入时，发送随机接入前导码(preamble)所能使用的所有随机接入时机(Random Access Occasion，简称RO)位置由网络通过系统消息配置。但最终哪些RO位置可用来发送前导码则取决于当前最强同步信号块(Synchronization Signal/Physical Broadcast Channel Block，简称SS/PBCH BLOCK，也即，SSB)索引(简称SSB index)的判定及网络配置的SSB和RO位置之间的映射关系。
而在5G新空口(New Radio，简称NR，也可称为新无线)环境中，由于网络信号时刻波动，最强SSB索引也可能发生变动进而影响UE最终使用RO位置的选择。
当最终选定的RO位置所处时隙(slot)没有足够的上行符号(symbol)用于发送前导码时，将会导致UE因为无上行资源而始终无法发起接入，严重降低成功接入机会。
发明内容
本发明解决的技术问题是在随机接入时如何增加成功接入机会。
为解决上述技术问题，本发明实施例提供一种前导码发送方法，包括：根据信道质量选择优选SSB，并根据SSB和候选RO位置的预设映射关系确定所述优选SSB对应的优选RO位置；判断所述优选RO位置所在PRACH时隙是否包含足够的上行符号；若判断结果表明所述PRACH时隙包含的上行符号不足，则在其他PRACH时隙根据信道质量选择替代RO位置，其中，所述其他PRACH时隙包含所述候选RO位置且包含足够的上行符号；在所述替代RO位置发送所述前导码。
可选的，所述判断所述优选RO位置所在PRACH时隙是否包含足够的上行符号包括：判断所述优选RO位置所在PRACH时隙包含的上行符号是否能够承载所述前导码的全部内容。
可选的，所述在其他PRACH时隙根据信道质量选择替代RO位置包括：根据SSB和候选RO位置的预设映射关系，确定所述其他PRACH时隙包含的候选RO位置对应的候选SSB；将信道质量高于预设门限的候选SSB确定为替代SSB；根据SSB和候选RO位置的预设映射关系确定所述替代SSB对应的替代RO位置。
可选的，所述根据SSB和候选RO位置的预设映射关系确定所述替代SSB对应的替代RO位置包括：当所述SSB和候选RO位置的预设映射关系表明所述替代SSB对应多个候选RO位置时，从对应的多个候选RO位置中随机选择得到所述替代RO位置。
可选的，所述预设门限根据PRACH的路损、RSRP以及信噪比确定，其中，不同的参数对应不同的权重系数。
可选的，所述SSB和候选RO位置的预设映射关系基于网络配置确定。
可选的，所述信道质量是根据对SSB位图的测量结果确定的。
本发明实施例还提供一种前导码发送装置，包括：第一选择模块， 用于根据信道质量选择优选SSB，并根据SSB和候选RO位置的预设映射关系确定所述优选SSB对应的优选RO位置；判断模块，用于判断所述优选RO位置所在PRACH时隙是否包含足够的上行符号；第二选择模块，若判断结果表明所述PRACH时隙包含的上行符号不足，则在其他PRACH时隙根据信道质量选择替代RO位置，其中，所述其他PRACH时隙包含所述候选RO位置且包含足够的上行符号；发送模块，用于在所述替代RO位置发送所述前导码。
本发明实施例还提供一种计算机可读存储介质，所述计算机可读存储介质为非易失性存储介质或非瞬态存储介质，其上存储有计算机程序，所述计算机程序被处理器运行时执行上述方法的步骤。
本发明实施例还提供一种前导码发送装置，包括存储器和处理器，所述存储器上存储有可在所述处理器上运行的计算机程序，所述处理器运行所述计算机程序时执行上述方法的步骤。
与现有技术相比，本发明实施例的技术方案具有以下有益效果：
本发明实施例提供一种前导码发送方法，包括：根据信道质量选择优选SSB，并根据SSB和候选RO位置的预设映射关系确定所述优选SSB对应的优选RO位置；判断所述优选RO位置所在PRACH时隙是否包含足够的上行符号；若判断结果表明所述PRACH时隙包含的上行符号不足，则在其他PRACH时隙根据信道质量选择替代RO位置，其中，所述其他PRACH时隙包含所述候选RO位置且包含足够的上行符号；在所述替代RO位置发送所述前导码。
较之现有严格按照网络配置的RO位置和SSB之间的映射关系以及当前测量到的最强SSB索引确定发送前导码的RO位置，导致出现最强SSB索引(即优选SSB)对应的优选RO位置所在PRACH时隙没有足够上行符号来发送前导码的情形时，UE将始终无法发起随机接入的技术方案。本申请方案能够在进行随机接入进程时增加成功接入机会。具体而言，在出现上述情形时，本申请方案通过查询是否有其他PRACH时隙能满足前导码发送要求，并暂时忽略SSB和RO位 置的映射关系，以此来增加UE在上述情形的成功接入机会。其中，暂时忽略SSB和RO位置的映射关系可以理解为，舍弃优选SSB对应的优选RO位置，转而寻找所处PRACH时隙包含足够上行符号的替代RO位置。
进一步，根据SSB和候选RO位置的预设映射关系，确定所述其他PRACH时隙包含的候选RO位置对应的候选SSB；将信道质量高于预设门限的候选SSB确定为替代SSB；根据SSB和候选RO位置的预设映射关系确定所述替代SSB对应的替代RO位置。在本发明方案中，替代RO位置对应的SSB的信道质量高于预设门限，以使在该替代RO位置发送的前导码能够成功传输至基站。
附图说明
图1是本发明实施例一种前导码发送方法的流程图；
图2是本发明实施例一种前导码发送装置的结构示意图。
具体实施方式
如背景技术所言，目前前导码发送所实际使用的RO位置会随着最终选定的SSB索引变化而变化，而NR的上下行时隙配置又很灵活。当变化后的SSB索引对应的RO位置所处物理随机接入信道(Physical Random Access Channel，简称PRACH)时隙没有足够的上行符号时，比如选定的RO位置刚好处于2毫秒(ms)的数据分发服务(Data Distribution Service，简称DDS)配置中的特殊时隙，则UE会一直无法发送preamble最终触发接入超时告警。
具体而言，现有技术的UE为发起随机接入而发送前导码时，会先根据网络配置参数来确定所有可用于发送前导码的RO位置(即候选RO位置)，包括时域位置和频域位置。然后UE会根据网络下发的SSB位图(bitmap)进行测量，看能检测到哪些SSB索引。然后在这些检测到的SSB中找到一个符合门限要求的SSB索引作为优选SSB用于发送前导码。由于小区在接入规则中已经指定了每个SSB 和候选RO位置的映射关系，所以当UE选定了优选SSB后，就相当于限定了能够用于发送的RO位置。也即，采用现有技术的UE只会也只能在最优SSB对应的RO位置上发送前导码，在NR这种上下行时隙配置非常灵活的场景中容错率低，严重降低成功接入机会。
为解决上述技术问题，本发明实施例提供一种前导码发送方法，包括：根据信道质量选择优选SSB，并根据SSB和候选RO位置的预设映射关系确定所述优选SSB对应的优选RO位置；判断所述优选RO位置所在PRACH时隙是否包含足够的上行符号；若判断结果表明所述PRACH时隙包含的上行符号不足，则在其他PRACH时隙根据信道质量选择替代RO位置，其中，所述其他PRACH时隙包含所述候选RO位置且包含足够的上行符号；在所述替代RO位置发送所述前导码。
本申请方案能够在进行随机接入进程时增加成功接入机会。具体而言，在出现上述情形时，本申请方案通过查询是否有其他PRACH时隙能满足前导码发送要求，并暂时忽略SSB和RO位置的映射关系，以此来增加UE在上述情形的成功接入机会。其中，暂时忽略SSB和RO位置的映射关系可以理解为，舍弃优选SSB对应的优选RO位置，转而寻找所处PRACH时隙包含足够上行符号的替代RO位置。
为使本发明的上述目的、特征和有益效果能够更为明显易懂，下面结合附图对本发明的具体实施例做详细的说明。
图1是本发明实施例一种前导码发送方法的流程图。
本实施方案可以由用户设备侧执行，如由用户设备侧的UE执行。
本实施方案可以应用于随机接入场景，如采用NR技术的随机接入场景。
在具体实施中，下述步骤S101～步骤S104所提供的前导码方法可以由用户设备中的具有随机接入功能的芯片执行，也可以由用户设备中的基带芯片执行。
具体地，参考图1，本实施例所述前导码发送方法可以包括如下步骤：
步骤S101，根据信道质量选择优选SSB，并根据SSB和候选RO位置的预设映射关系确定所述优选SSB对应的优选RO位置；
步骤S102，判断所述优选RO位置所在PRACH时隙是否包含足够的上行符号；
若所述步骤S102的判断结果为否，也即所述PRACH时隙包含的上行符号不足，则执行步骤S103，即在其他PRACH时隙根据信道质量选择替代RO位置，其中，所述其他PRACH时隙包含所述候选RO位置且包含足够的上行符号。
进一步，在执行步骤S103后，还执行步骤S104，即在所述替代RO位置发送所述前导码。
若所述步骤S102的判断结果为是，也即所述PRACH时隙包含足够的上行符号，则执行步骤S105，即在所述优选RO位置发送所述前导码。
在一个具体实施中，本实施例所述前导码发送进程可以是UE的物理(Physical，简称PHY)层接收到随机接入请求后触发执行的。
进一步，在步骤S101之前，还可以包括步骤：获取所有可用的RO位置，即候选RO位置。如根据网络配置参数确定所有的候选RO位置。
在一个具体实施中，所述信道质量可以是根据对SSB位图(bitmap)的测量结果确定的。
进一步，步骤S101中，可以将测量得到的所有SSB中信道质量最强的SSB确定为所述优选SSB。
进一步，所述优选SSB的信道质量高于预设门限。其中，所述预设门限可以根据PRACH的路损、参考信号接收功率(Reference  Signal Received Power，简称RSRP)以及信噪比确定。在具体实施中，上述三个参数可以分别对应不同的权重系数，按各自对应的权重系数加权求得得到所述预设门限。各权重系数的具体数值可以根据译码容易度综合确定。
在一个具体实施中，所述SSB和候选RO位置的预设映射关系可以基于网络配置确定。例如，所述预设映射关系可以用于指示SSB索引与候选RO位置之间的对应关系。
进一步，SSB索引与候选RO位置可以是一一对应的，也可以是多对一或一对多的映射关系。
当预设映射关系表明优选SSB对应多个候选RO位置时，可以从中随机选择一个候选RO位置作为所述优选RO位置。
在一个具体实施中，所述步骤S102可以包括步骤：判断所述优选RO位置所在PRACH时隙包含的上行符号是否能够承载所述前导码的全部内容。
若优选RO位置所在PRACH时隙包含的上行符号不足以发送前导码，则执行步骤S103和步骤S104。
基于本实施方案，当根据最强SSB索引选定的优选RO位置没有足够上行符号用于发送前导码时，只要当前小区存在其他PRACH时隙且该时隙有足够的上行符号用于发送前导码。则直接以该其他PRACH时隙上的RO位置来发送前导码，以此来增加成功接入机会。
也就是说，在检测到选定的所有RO都无足够符号(symbol)可用于发送后，只要查询到有其他满足发送条件的PRACH时隙，则忽略原有的RO选择机制，在网络允许的其他PRACH时隙上发起接入，以提升接入机会。
在一个具体实施中，其他PRACH时隙可以指，除了优选RO位置所处PRACH时隙外，其他包含候选RO位置的PRACH时隙。
在一个具体实施中，其他PRACH时隙包含的候选RO位置与优选RO位置可以对应于同一SSB，即都对应于步骤S101所选定的优选SSB。
例如，假设协议规定在时隙18和时隙19都能发送前导码，则时隙18和时隙19都有候选RO位置，这两个时隙的所有候选RO位置都对应同一SSB，且UE当前只检测到这一个SSB。假设步骤S101时选定时隙18中的某一候选RO位置为优选RO位置发送前导码。若执行步骤S102的判断结果表明时隙18的上行符号不够发送前导码，则时隙18中所有候选RO位置都舍弃，UE转而使用时隙19中的候选RO位置作为替代RO位置发送前导码。
在一个变化例中，其他PRACH时隙包含的候选RO位置与优选RO位置可以对应于不同的SSB。
在本实施方案中，可以根据其他PRACH时隙所包含候选RO位置对应SSB的信道质量选择合适的替代RO位置，以进一步增加成功接入几乎。
在一个具体实施中，步骤S103可以包括步骤：根据SSB和候选RO位置的预设映射关系，确定所述其他PRACH时隙包含的候选RO位置对应的候选SSB；将信道质量高于预设门限的候选SSB确定为替代SSB；根据SSB和候选RO位置的预设映射关系确定所述替代SSB对应的替代RO位置。
由此，替代RO位置对应的SSB的信道质量高于预设门限，以使在该替代RO位置发送的前导码能够成功传输至基站。
进一步，当存在多个信道质量高于预设门限的候选SSB时，可以将其中信道质量最优的候选SSB确定为替代SSB。
进一步，当所述SSB和候选RO位置的预设映射关系表明所述替代SSB对应多个候选RO位置时，可以从对应的多个候选RO位置中随机选择得到所述替代RO位置。
在一个具体实施中，若没有合适的其他PRACH时隙，或者其他PRACH时隙包含的候选RO位置对应SSB的信道质量均低于预设门限，则发送告警信息以提示前导码无法发送。
进一步，发送告警信息的动作可以在接入未超时的时候就执行，以提高UE响应效率。
由上，采用本实施方案，能够在进行随机接入进程时增加成功接入机会。具体而言，在出现上述情形时，本申请方案通过查询是否有其他PRACH时隙能满足前导码发送要求，并暂时忽略SSB和RO位置的映射关系，以此来增加UE在上述情形的成功接入机会。其中，暂时忽略SSB和RO位置的映射关系可以理解为，舍弃优选SSB对应的优选RO位置，转而寻找所处PRACH时隙包含足够上行符号的替代RO位置。
图2是本发明实施例一种前导码发送装置的结构示意图。本领域技术人员理解，本实施例所述前导码发送装置可以用于实施上述图1所述实施例中所述的方法技术方案。
具体地，参考图2，本实施例所述前导码发送装置2可以包括：第一选择模块21，用于根据信道质量选择优选SSB，并根据SSB和候选RO位置的预设映射关系确定所述优选SSB对应的优选RO位置；判断模块22，用于判断所述优选RO位置所在PRACH时隙是否包含足够的上行符号；第二选择模块23，若判断结果表明所述PRACH时隙包含的上行符号不足，则在其他PRACH时隙根据信道质量选择替代RO位置，其中，所述其他PRACH时隙包含所述候选RO位置且包含足够的上行符号；发送模块24，用于在所述替代RO位置发送所述前导码。
关于所述前导码发送装置2的工作原理、工作方式的更多内容，可以参照上述图1中的相关描述，这里不再赘述。
在具体实施中，上述的前导码发送装置可以对应于用户设备中具 有随机接入功能的芯片，或者对应于具有数据处理功能的芯片，例如片上系统(System-On-a-Chip，简称SOC)、基带芯片等；或者对应于用户设备中包括具有随机接入功能芯片的芯片模组；或者对应于具有数据处理功能芯片的芯片模组，或者对应于用户设备。
在具体实施中，关于上述实施例中描述的各个装置、产品包含的各个模块/单元，其可以是软件模块/单元，也可以是硬件模块/单元，或者也可以部分是软件模块/单元，部分是硬件模块/单元。
例如，对于应用于或集成于芯片的各个装置、产品，其包含的各个模块/单元可以都采用电路等硬件的方式实现，或者，至少部分模块/单元可以采用软件程序的方式实现，该软件程序运行于芯片内部集成的处理器，剩余的(如果有)部分模块/单元可以采用电路等硬件方式实现；对于应用于或集成于芯片模组的各个装置、产品，其包含的各个模块/单元可以都采用电路等硬件的方式实现，不同的模块/单元可以位于芯片模组的同一组件(例如芯片、电路模块等)或者不同组件中，或者，至少部分模块/单元可以采用软件程序的方式实现，该软件程序运行于芯片模组内部集成的处理器，剩余的(如果有)部分模块/单元可以采用电路等硬件方式实现；对于应用于或集成于终端的各个装置、产品，其包含的各个模块/单元可以都采用电路等硬件的方式实现，不同的模块/单元可以位于终端内同一组件(例如，芯片、电路模块等)或者不同组件中，或者，至少部分模块/单元可以采用软件程序的方式实现，该软件程序运行于终端内部集成的处理器，剩余的(如果有)部分模块/单元可以采用电路等硬件方式实现。
本发明实施例还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为非易失性存储介质或非瞬态存储介质，其上存储有计算机程序，所述计算机程序被处理器运行时执行上述任一实施例提供的前导码发送方法的步骤。优选地，所述存储介质可以包括诸如非挥发性(non-volatile)存储器或者非瞬态(non-transitory)存储器等计算机可读存储介质。所述存储介质可以包括ROM、RAM、磁盘或光盘 等。
本发明实施例还提供了另一种前导码发送装置，包括存储器和处理器，所述存储器上存储有可在所述处理器上运行的计算机程序，所述处理器运行所述计算机程序时执行上述图1对应实施例所提供的前导码发送方法的步骤。
虽然本发明披露如上，但本发明并非限定于此。任何本领域技术人员，在不脱离本发明的精神和范围内，均可作各种更动与修改，因此本发明的保护范围应当以权利要求所限定的范围为准。
本领域普通技术人员可以理解上述实施例的各种方法中的全部或部分步骤是可以通过程序来指示相关的硬件来完成，该程序可以存储于一计算机可读存储介质中，存储介质可以包括：ROM、RAM、磁盘或光盘等。
本方明技术方案可适用于5G(5generation)通信系统，还可适用于4G、3G通信系统，还可适用于后续演进的各种通信系统，例如6G、7G等。
本方明技术方案也适用于不同的网络架构，包括但不限于中继网络架构、双链接架构，Vehicle-to-Everything(车辆到任何物体的通信)架构。
本申请实施例中所述的5G CN也可以称为新型核心网(new core)、或者5G NewCore、或者下一代核心网(next generation core，NGC)等。5G-CN独立于现有的核心网，例如演进型分组核心网(evolved packet core，EPC)而设置。
本申请实施例中的基站(base station，BS)，也可称为基站设备，是一种部署在无线接入网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,BTS)和基站控制器(base station controller，BSC)，3G网络中提供基站功能的设备包括节点B(NodeB)和无线网络控制器(radio  network controller，RNC)，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，WLAN)中，提供基站功能的设备为接入点(access point，AP)，5G新无线(New Radio，NR)中的提供基站功能的设备包括继续演进的节点B(gNB),以及未来新的通信系统中提供基站功能的设备等。
本申请实施例中的终端可以指各种形式的用户设备(user equipment，UE)、接入终端、用户单元、用户站、移动站、移动台(mobile station，MS)、远方站、远程终端、移动设备、用户终端、终端设备(terminal equipment)、无线通信设备、用户代理或用户装置。终端设备还可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol，SIP)电话、无线本地环路(Wireless Local Loop，WLL)站、个人数字处理(Personal Digital Assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，未来5G网络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，PLMN)中的终端设备等，本申请实施例对此并不限定。
本申请实施例定义接入网到终端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；而终端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。
应理解，本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，表示前后关联对象是一种“或”的关系。
本申请实施例中出现的“多个”是指两个或两个以上。
本申请实施例中出现的第一、第二等描述，仅作示意与区分描述对象之用，没有次序之分，也不表示本申请实施例中对设备个数的特 别限定，不能构成对本申请实施例的任何限制。
本申请实施例中出现的“连接”是指直接连接或者间接连接等各种连接方式，以实现设备间的通信，本申请实施例对此不做任何限定。本申请实施例中出现的“网络”与“系统”表达的是同一概念，通信系统即为通信网络。
应理解，本申请实施例中，所述处理器可以为中央处理单元(central processing unit，简称CPU)，该处理器还可以是其他通用处理器、数字信号处理器(digital signal processor，简称DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。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。
还应理解，本申请实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的随机存取存储器(random access memory，RAM)可用，例如静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。
上述实施例，可以全部或部分地通过软件、硬件、固件或其他任 意组合来实现。当使用软件实现时，上述实施例可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令或计算机程序。在计算机上加载或执行所述计算机指令或计算机程序时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以为通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集合的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质。半导体介质可以是固态硬盘。
应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
在本申请所提供的几个实施例中，应该理解到，所揭露的方法、装置和系统，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的 需要选择其中的部分或者全部单元来实现本实施例方案的目的。另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理包括，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用硬件加软件功能单元的形式实现。
上述以软件功能单元的形式实现的集成的单元，可以存储在一个计算机可读取存储介质中。上述软件功能单元存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本发明各个实施例所述方法的部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，简称ROM)、随机存取存储器(Random Access Memory，简称RAM)、磁碟或者光盘等各种可以存储程序代码的介质。

Claims (10)

  1. 一种前导码发送方法，其特征在于，包括：
    根据信道质量选择优选SSB，并根据SSB和候选RO位置的预设映射关系确定所述优选SSB对应的优选RO位置；
    判断所述优选RO位置所在PRACH时隙是否包含足够的上行符号；
    若判断结果表明所述PRACH时隙包含的上行符号不足，则在其他PRACH时隙根据信道质量选择替代RO位置，其中，所述其他PRACH时隙包含所述候选RO位置且包含足够的上行符号；
    在所述替代RO位置发送所述前导码。
  2. 根据权利要求1所述的前导码发送方法，其特征在于，所述判断所述优选RO位置所在PRACH时隙是否包含足够的上行符号包括：
    判断所述优选RO位置所在PRACH时隙包含的上行符号是否能够承载所述前导码的全部内容。
  3. 根据权利要求1所述的前导码发送方法，其特征在于，所述在其他PRACH时隙根据信道质量选择替代RO位置包括：
    根据SSB和候选RO位置的预设映射关系，确定所述其他PRACH时隙包含的候选RO位置对应的候选SSB；
    将信道质量高于预设门限的候选SSB确定为替代SSB；
    根据SSB和候选RO位置的预设映射关系确定所述替代SSB对应的替代RO位置。
  4. 根据权利要求3所述的前导码发送方法，其特征在于，所述根据SSB和候选RO位置的预设映射关系确定所述替代SSB对应的替代RO位置包括：
    当所述SSB和候选RO位置的预设映射关系表明所述替代SSB对应多个候选RO位置时，从对应的多个候选RO位置中随机选择得到所述替代RO位置。
  5. 根据权利要求3所述的前导码发送方法，其特征在于，所述预设门限根据PRACH的路损、RSRP以及信噪比确定，其中，不同的参数对应不同的权重系数。
  6. 根据权利要求1所述的前导码发送方法，其特征在于，所述SSB和候选RO位置的预设映射关系基于网络配置确定。
  7. 根据权利要求1所述的前导码发送方法，其特征在于，所述信道质量是根据对SSB位图的测量结果确定的。
  8. 一种前导码发送装置，其特征在于，包括：
    第一选择模块，用于根据信道质量选择优选SSB，并根据SSB和候选RO位置的预设映射关系确定所述优选SSB对应的优选RO位置；
    判断模块，用于判断所述优选RO位置所在PRACH时隙是否包含足够的上行符号；
    第二选择模块，若判断结果表明所述PRACH时隙包含的上行符号不足，则在其他PRACH时隙根据信道质量选择替代RO位置，其中，所述其他PRACH时隙包含所述候选RO位置且包含足够的上行符号；
    发送模块，用于在所述替代RO位置发送所述前导码。
  9. 一种计算机可读存储介质，所述计算机可读存储介质为非易失性存储介质或非瞬态存储介质，其上存储有计算机程序，其特征在于，所述计算机程序被处理器运行时执行权利要求1至7中任一项所述方法的步骤。
  10. 一种前导码发送装置，包括存储器和处理器，所述存储器上存储 有可在所述处理器上运行的计算机程序，其特征在于，所述处理器运行所述计算机程序时执行权利要求1至7中任一项所述方法的步骤。
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