WO2025035249A1 - Prach发送和接收方法以及装置 - Google Patents

Prach发送和接收方法以及装置 Download PDF

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Publication number
WO2025035249A1
WO2025035249A1 PCT/CN2023/112498 CN2023112498W WO2025035249A1 WO 2025035249 A1 WO2025035249 A1 WO 2025035249A1 CN 2023112498 W CN2023112498 W CN 2023112498W WO 2025035249 A1 WO2025035249 A1 WO 2025035249A1
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Prior art keywords
prach
ros
time period
period
opportunity
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PCT/CN2023/112498
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English (en)
French (fr)
Inventor
田妍
蒋琴艳
张磊
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Fujitsu Ltd
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Fujitsu Ltd
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Priority to PCT/CN2023/112498 priority Critical patent/WO2025035249A1/zh
Priority to CN202380100992.2A priority patent/CN121694013A/zh
Publication of WO2025035249A1 publication Critical patent/WO2025035249A1/zh
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access

Definitions

  • the embodiments of the present application relate to the field of communication technologies.
  • NR Rel-18 studies the enhancement of the power of physical random access channel (PRACH) transmitted by terminal equipment (UE) through multiple physical random access channel transmission (multiple PRACH transmission), so that network equipment can receive PRACH sent by terminal equipment in the area with weaker coverage, thereby improving the coverage of the initial access channel and ensuring that terminal equipment at the edge of the cell can access the cell, thereby improving the coverage capability of the system.
  • PRACH physical random access channel
  • PRACH resource configuration scheme relevant PRACH resource information will be configured in the system information, including rach-ConfigCommon and additionalRACH-ConfigList-r17.
  • the network equipment configures PRACH frequency domain resources, PRACH configuration index and other PRACH resource information through radio resource control (RRC, Radio Resource Control) signaling.
  • RRC Radio Resource Control
  • the terminal device can obtain PRACH opportunity (RO) and other time-frequency resource related information through the PRACH configuration index and other lookup tables.
  • RO PRACH opportunity
  • the inventors discovered that when a terminal device transmits PRACH, it is necessary to map a synchronization signal block (SSB) to a RO.
  • SSB synchronization signal block
  • the association period also referred to as the association period
  • the SSB-to-RO association pattern period also referred to as the association pattern period
  • the preamble needs to be repeatedly sent on at least multiple ROs in the time domain. Therefore, within the current time period, it cannot be guaranteed that the number of ROs mapping the same SSB index in the time domain is greater than or equal to the repetition number of multiple PRACH transmissions. It is necessary to determine the time period for multiple PRACH transmissions.
  • the present invention provides a PRACH sending and receiving method and device.
  • a PRACH sending method including:
  • the terminal device determines a second number of ROs associated with a time period, wherein the time period is an association pattern period (SSB-to-RO association pattern period) of the first number of synchronization signal blocks (SSBs) and PRACH opportunities (ROs);
  • SSB-to-RO association pattern period association pattern period
  • ROs PRACH opportunities
  • the terminal device repeatedly sends a preamble on the second number of ROs.
  • a PRACH sending device which is configured in a terminal device, and the device includes:
  • a processing unit that determines a second number of ROs associated with a time period, wherein the time period is an association pattern period (SSB-to-RO association pattern period) of the first number of synchronization signal blocks (SSBs) and PRACH opportunities (ROs);
  • SSB-to-RO association pattern period association pattern period
  • ROs PRACH opportunities
  • a sending unit is configured to repeatedly send a preamble on the second number of ROs.
  • a PRACH receiving method including:
  • the network device receives a preamble repeatedly sent by the terminal device on a second number of ROs
  • the terminal device determines the second number of ROs associated with a time period, and the time period is an association pattern period (SSB-to-RO association pattern period) of a first number of synchronization signal blocks (SSBs) and PRACH opportunities (ROs).
  • SSB-to-RO association pattern period association pattern period of a first number of synchronization signal blocks (SSBs) and PRACH opportunities (ROs).
  • a PRACH receiving device which is configured in a network device, and the device includes:
  • a receiving unit configured to receive a preamble repeatedly sent by a terminal device on a second number of ROs
  • the terminal device determines the second number of ROs associated with a time period, and the time period is an association pattern period (SSB-to-RO association pattern period) of a first number of synchronization signal blocks (SSBs) and PRACH opportunities (ROs).
  • SSB-to-RO association pattern period association pattern period of a first number of synchronization signal blocks (SSBs) and PRACH opportunities (ROs).
  • a communication system including:
  • a terminal device which determines a second number of ROs associated with a time period, wherein the time period is an association pattern period (SSB-to-RO association pattern period) of the first number of synchronization signal blocks (SSBs) and PRACH opportunities (ROs);
  • SSB-to-RO association pattern period association pattern period
  • ROs PRACH opportunities
  • a network device receives the preamble repeatedly sent by the terminal device on the second number of ROs.
  • the terminal device determines the second number of time periods related RO, the time period is the association pattern period of the first number of SSBs and RO.
  • the terminal device can quickly obtain the RO resources sent by multiple PRACHs, and ensure that all SSBs in the multiple PRACHs are mapped to RO, thereby improving the coverage capability of the system.
  • FIG1 is a schematic diagram of a communication system according to an embodiment of the present application.
  • FIG2 is a schematic diagram of a PRACH sending method according to an embodiment of the present application.
  • FIG3 is an example diagram of an association pattern period according to an embodiment of the present application.
  • FIG4 is another example diagram of an association pattern period according to an embodiment of the present application.
  • FIG5 is another example diagram of an association pattern period according to an embodiment of the present application.
  • FIG6 is another example diagram of an association pattern period according to an embodiment of the present application.
  • FIG7 is another example diagram of an association pattern period according to an embodiment of the present application.
  • FIG8 is another example diagram of an association pattern period according to an embodiment of the present application.
  • FIG9 is another example diagram of an association pattern period according to an embodiment of the present application.
  • FIG10 is another example diagram of an association pattern period according to an embodiment of the present application.
  • FIG11 is another example diagram of an association pattern period according to an embodiment of the present application.
  • FIG12 is another example diagram of an association pattern period according to an embodiment of the present application.
  • FIG13 is another example diagram of an association pattern period according to an embodiment of the present application.
  • FIG14 is another example diagram of an association pattern period according to an embodiment of the present application.
  • FIG15 is another example diagram of an association pattern period according to an embodiment of the present application.
  • FIG16 is another example diagram of an association pattern period according to an embodiment of the present application.
  • FIG17 is an example diagram of a PRACH configuration according to an embodiment of the present application.
  • FIG18 is a schematic diagram of a PRACH receiving method according to an embodiment of the present application.
  • FIG19 is a schematic diagram of a PRACH transmitting apparatus according to an embodiment of the present application.
  • FIG20 is a schematic diagram of a PRACH receiving device according to an embodiment of the present application.
  • FIG21 is a schematic diagram of a network device according to an embodiment of the present application.
  • Figure 22 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • the terms “first”, “second”, etc. are used to distinguish different elements in terms of title, but do not indicate the spatial arrangement or temporal order of these elements, etc., and these elements should not be limited by these terms.
  • the term “and/or” includes any one and all combinations of one or more of the associated listed terms.
  • the terms “comprising”, “including”, “having”, etc. refer to the presence of the stated features, elements, components or components, but do not exclude the presence or addition of one or more other features, elements, components or components.
  • the term “communication network” or “wireless communication network” may refer to a network that complies with any of the following communication standards, such as Long Term Evolution (LTE), enhanced Long Term Evolution (LTE-A), Wideband Code Division Multiple Access (WCDMA), High-Speed Packet Access (HSPA), and the like.
  • LTE Long Term Evolution
  • LTE-A enhanced Long Term Evolution
  • WCDMA Wideband Code Division Multiple Access
  • HSPA High-Speed Packet Access
  • the communication between devices in the communication system can be carried out according to the communication protocol at any stage, for example Including but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and 5G, New Radio (NR), future 6G, etc., and/or other communication protocols currently known or to be developed in the future.
  • the term "network device” refers to, for example, a device in a communication system that connects a terminal device to a communication network and provides services for the terminal device.
  • the network device may include, but is not limited to, the following devices: base station (BS), access point (AP), transmission reception point (TRP), broadcast transmitter, mobile management entity (MME), gateway, server, radio network controller (RNC), base station controller (BSC), etc.
  • base stations may include but are not limited to: Node B (NodeB or NB), evolved Node B (eNodeB or eNB) and 5G base station (gNB), IAB host, etc., and may also include remote radio heads (RRH, Remote Radio Head), remote radio units (RRU, Remote Radio Unit), relays or low-power nodes (such as femeto, pico, etc.).
  • NodeB Node B
  • eNodeB or eNB evolved Node B
  • gNB 5G base station
  • IAB host etc.
  • RRH Remote Radio Head
  • RRU Remote Radio Unit
  • relays or low-power nodes such as femeto, pico, etc.
  • base station may include some or all of their functions, and each base station can provide communication coverage for a specific geographical area.
  • the term "cell” can refer to a base station and/or its coverage area, depending on the context in which the term is used.
  • the term "user equipment” (UE) or “terminal equipment” (TE) refers to a device that accesses a communication network through a network device and receives network services.
  • the terminal device may be fixed or mobile, and may also be referred to as a mobile station (MS), a terminal, a subscriber station (SS), an access terminal (AT), a station, and the like.
  • terminal devices may include but are not limited to the following devices: cellular phones, personal digital assistants (PDA, Personal Digital Assistant), wireless modems, wireless communication devices, handheld devices, machine-type communication devices, laptop computers, cordless phones, smart phones, smart watches, digital cameras, etc.
  • PDA personal digital assistants
  • wireless modems wireless communication devices
  • handheld devices machine-type communication devices
  • laptop computers cordless phones
  • smart phones smart watches, digital cameras, etc.
  • the terminal device can also be a machine or device for monitoring or measuring, such as but not limited to: machine type communication (MTC) terminal, vehicle-mounted communication terminal, device to device (D2D) terminal, machine to machine (M2M) terminal, and so on.
  • MTC machine type communication
  • D2D device to device
  • M2M machine to machine
  • network side or “network equipment side” refers to one side of the network, which can be a base station or a Including one or more network devices as above.
  • user side or “terminal side” or “terminal device side” refers to the side of the user or terminal, which can be a certain UE, or can also include one or more terminal devices as above.
  • device can refer to network equipment or terminal equipment.
  • FIG1 is a schematic diagram of a communication system according to an embodiment of the present application, schematically illustrating a situation taking a terminal device and a network device as an example.
  • a communication system 100 may include a network device 101 and terminal devices 102 and 103.
  • FIG1 only illustrates two terminal devices and one network device as an example, but the embodiment of the present application is not limited thereto.
  • existing services or future services can be sent between the network device 101 and the terminal devices 102 and 103.
  • these services may include but are not limited to: enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable and low-latency communication (URLLC), etc.
  • eMBB enhanced mobile broadband
  • mMTC massive machine type communication
  • URLLC ultra-reliable and low-latency communication
  • FIG1 shows that both terminal devices 102 and 103 are within the coverage of the network device 101, but the present application is not limited thereto. Both terminal devices 102 and 103 may not be within the coverage of the network device 101, or one terminal device 102 is within the coverage of the network device 101 and the other terminal device 103 is outside the coverage of the network device 101.
  • the high-level signaling may be, for example, a radio resource control (RRC) signaling; for example, an RRC message (RRC message), including, for example, MIB, system information (system information), a dedicated RRC message; or an RRC IE (RRC information element).
  • RRC radio resource control
  • the high-level signaling may also be, for example, a MAC (Medium Access Control) signaling; or a MAC CE (MAC control element).
  • RRC radio resource control
  • the time domain pattern of SSB-RO mapping for sending PRACH can be determined in advance and repeated in the time domain. According to the configuration of RO (PRACH occasion), the PRACH configuration period for PARCH transmission can be obtained.
  • a PRACH configuration period may drop some RO resources due to conflicts with SSB or downlink channels, and may not be able to map all SSBs. Therefore, an SSB-to-RO association period is defined for single PRACH transmission. It is guaranteed that all SSB indexes are mapped at least once. However, the SSB-RO mapping pattern formed by the SSB-to-RO association period is not necessarily guaranteed to be repeated in the time domain, so the SSB-RO association pattern period is defined.
  • the association pattern period defined for single PRACH transmission may not guarantee that the number of ROs mapping the same SSB index in the time domain is greater than or equal to the number of repetitions of multiple PRACH transmissions. Therefore, for multiple PRACH transmission using the legacy SSB-RO mapping method, it is necessary to further determine the period (or time length) of the SSB-RO mapping pattern that can be repeated.
  • PRACH Physical random access channel
  • PDCH physical downlink control channel
  • PDSCH physical downlink data channel
  • sending (transmitting) or receiving (receiving) PRACH can be understood as sending or receiving random access information carried by PRACH
  • sending (transmitting) or receiving (receiving) PDCCH can be understood as sending or receiving downlink control information carried by PDCCH
  • sending or receiving PDSCH can be understood as sending or receiving downlink data carried by PDSCH.
  • the preamble can be called a random access preamble or a PRACH preamble.
  • FIG2 is a schematic diagram of the PRACH transmission method of the embodiment of the present application. As shown in FIG2, the method includes:
  • a terminal device determines a second number of ROs associated with a time period, where the time period is an association pattern period (SSB-to-RO association pattern period) of a first number of synchronization signal blocks (SSBs) and PRACH opportunities (ROs);
  • SSB-to-RO association pattern period association pattern period
  • ROs PRACH opportunities
  • the terminal device repeatedly sends a preamble on the second number of ROs.
  • FIG. 2 above only schematically illustrates the embodiment of the present application, but the present application is not limited thereto.
  • the execution order of each operation can be appropriately adjusted, and other operations can also be added.
  • Those skilled in the art may make appropriate modifications based on the above content, and are not limited to the description of FIG. 2 above.
  • the time period X is, for example, in milliseconds (ms).
  • the second number N is the repetition number of the PRACH transmission, where N is a positive integer greater than 1; the terminal device repeatedly transmits the preamble on N ROs, that is, the N ROs transmit the same preamble.
  • N ROs that transmit the same preamble may be referred to as an RO group, that is, an RO group includes N ROs, where N is the repetition number of the PRACH transmission.
  • the PRACH transmission targeted by the embodiments of the present application may be referred to as multiple PRACH transmissions, but is not limited thereto.
  • other names may also be used, such as MSG 1 repetion, PRACH repetition, multiple MSG1 transmissions, etc.
  • the repetition number may also be referred to as the number of multiple PRACH transmissions.
  • the time period is determined based on a valid PRACH opportunity (valid RO) configured by a separate PRACH opportunity configuration and/or a common PRACH opportunity configuration (configuration of PRACH occasion).
  • valid RO valid PRACH opportunity
  • the PRACH resources configured by rach-ConfigCommon-r17 in AdditionalRACH-Config-r17 are a configuration of PRACH occasions.
  • the PRACH resources configured by rach-ConfigCommon-r17 in AdditionalRACH-Config-r17 i.e., configuration of PRACH occasions
  • the separate configuration of PRACH occasions is separate from the configuration of PRACH occasions of other features or the configuration of PRACH occasions of single PRACH transmission.
  • the PRACH resources configured by rach-ConfigCommon-r17 in AdditionalRACH-Config-r17 are used for the feature of multiple PRACH transmission or msg1-repetition (or for multiple PRACH transmissions), and for other features such as redcap and/or smalldata and/or nsag and/or msg3-Repetition.
  • the configuration of PRACH occasions is the common configuration of PRACH occasions of multiple PRACH transmissions and other feature configuration of PRACH occasions or single PRACH transmission.
  • the configuration of rach-ConfigCommon-r17 in AdditionalRACH-Config-r17 The PRACH resource (ie, configuration of PRACH occasions) is only used for multiple PRACH transmission or has only a feature of one repetition number of msg1-repetition (or for multiple PRACH transmissions), and the separate configuration of PRACH occasions means that the multiple PRACH transmissions of the repetition number are separate from the multiple PRACH transmissions of other repetition numbers.
  • the PRACH resources configured by rach-ConfigCommon-r17 in AdditionalRACH-Config-r17 are used for multiple PRACH transmission or msg1-repetition (or for multiple PRACH transmissions) feature of multiple repetition numbers
  • the configuration of PRACH occasions is the common configuration of PRACH occasions for multiple PRACH transmissions with multiple repetition numbers.
  • the above is an exemplary description of the PRACH configuration related to the present application, but the present application is not limited to this.
  • the specific configuration name may be changed, and configurations or signaling or information with the same or similar functions or effects are all within the scope of the present application.
  • the time period may be determined based on a valid RO determined by a separate PRACH opportunity configuration, or may be determined based on a valid RO determined by a common PRACH opportunity configuration.
  • features or combination of features transmitted by PRACH with different numbers of repetitions correspond to separate PRACH opportunity configurations, or features or combination of features transmitted by PRACH with different numbers of repetitions correspond to common PRACH opportunity configurations.
  • PRACH configuration can be configured by high-level parameters rach-ConfigCommon and msgA-ConfigCommon, and PRACH resources or PRACH occasions resources can be determined according to the configured PRACH configuration.
  • PRACH resources can be associated with a feature or a combination of features; the feature or combination of features is indicated by an RRC parameter, and the PRACH resources or PRACH occasions configured by the PRACH configuration are associated with (or used for) which feature or combination of features.
  • a feature or combination of features may include MSG1 repetition/multiple PRACH transmission, for example, a feature or combination of features may include A feature including multiple PRACH transmissions or a feature including multiple PRACH transmissions with different numbers.
  • the feature indicating the configuration of PRACH occasions is multiple PRACH transmissions with repetition number 2, or the features combination is a combination of repetition number 2 and repetition number 4.
  • separate PRACH opportunity configuration can be understood as follows: the configuration of PRACH occasions, a feature or combination of features for MSG1repetition/multiple PRACH transmission, and the configuration of PRACH occasions for single PRACH transmissions are separate configurations; or, multiple PRACH transmissions and single PRACH transmissions are distinguished on separate ROs.
  • the common PRACH opportunity configuration can be understood as follows: the configuration of PRACH occasions for a feature or combination of features is MSG1repetition/multiple PRACH transmission and the configuration of PRACH occasions for single PRACH transmissions are the same configuration, or a common (shared) configuration. Alternatively, multiple PRACH transmissions are distinguished from single PRACH transmissions on shared ROs.
  • valid ROs may follow the definition of valid RO in the 38.213 protocol, such as ROs that do not conflict with SSB and whose time interval with SSB is not less than a threshold, and ROs that do not conflict/overlap with downlink time domain units in TDD configuration; the present application is not limited to this.
  • the first number K is configured and/or indicated by first information from a network device, the first information includes radio resource control (RRC) signaling and/or MAC CE and/or downlink control information, and K is a positive integer.
  • RRC radio resource control
  • the network device may indicate the K value through information in SIB1.
  • the first number configured and/or indicated by the network device is a value in a set of candidate values.
  • a candidate value set of the K value and the K value are indicated in SIB1.
  • the K value may be configured in BWP-UplinkCommon, or in AdditionalRACH-Config, or in RACH-ConfigCommon or in FeatureCombinationPreambles; the present application is not limited thereto.
  • the candidate values of K are ⁇ K1, K2, K3, ... ⁇ , and the gNB configures a K value from the candidate value set.
  • FIG3 is an example diagram of an association pattern period of an embodiment of the present application, in which only valid ROs are shown for convenience.
  • the number of SSB indexes is 4.
  • the PRACH configuration and the configurations of SSB and preamble it can be known that there are 8 valid ROs associated with the same SSB in the time domain in an association pattern period.
  • the PRACH configuration is used for multiple PRACH transmissions with a repetition number of 4, then two RO groups associated with the same SSB can be determined in an association pattern period, that is, the valid ROs associated with SSB 0 shown in FIG3 can form two RO groups (RO group 1 and RO group 2).
  • one association pattern period can be determined as a repeatable pattern that associates SSBs with ROs.
  • the candidate values of the K value are ⁇ 1,2,3,4 ⁇ , and the gNB will configure the value in the candidate value set, that is, K is 1.
  • FIG4 is another example diagram of the association pattern period of an embodiment of the present application, in which only valid ROs are shown for convenience.
  • the number of SSB indexes is 8.
  • the PRACH configuration and the configurations such as SSB and preamble it can be known that: there are 4 valid ROs associated with the same SSB in the time domain in one association pattern period.
  • the PRACH configuration is used for multiple PRACH transmissions with a repetition number of 8, then 1 RO group associated with the same SSB can be determined within 2 association pattern periods, and as shown in FIG4 , valid ROs associated with SSB 0 can form 1 RO group.
  • 2 association pattern periods can be determined as repeatable patterns that associate SSBs with ROs.
  • the candidate values of the K value are ⁇ 1,2,3,4 ⁇ , and the gNB will configure the value in the candidate value set, that is, K is 2.
  • a first association pattern period corresponds to a first candidate value set
  • a second association pattern period corresponds to a second candidate value set
  • the first association pattern period is different from the second association pattern period
  • the K values corresponding to the association pattern period values are shown in Table 1 below.
  • FIG5 is another example diagram of the association pattern period of an embodiment of the present application.
  • SSB index The number is 8.
  • a PRACH configuration period is 10ms
  • 4 SSBs can be mapped in a PRACH configuration period.
  • An association pattern period consists of 2, 4, and 2 association periods respectively, and an association pattern period is 80ms. From Table 1 above, it can be seen that the configurable K values are ⁇ 1, 2, 4, 8, 16 ⁇ .
  • the ROs marked in gray in Figure 5 are invalid ROs or ROs that cannot map SSBs (also known as unused ROs).
  • the valid ROs associated with SSB 0 form 3 RO groups (RO group 1, RO group 2, and RO group 3).
  • 2 association pattern periods can be determined as repeatable patterns that associate SSBs with ROs.
  • the candidate values of K are ⁇ 1,2,3,4,8,16 ⁇ , and the gNB will configure the value in the candidate value set, that is, K is 2.
  • the above exemplary embodiment describes the case where the network device directly configures the K value.
  • the following describes the case where the K value is obtained through other parameters.
  • the first number is obtained based on at least second information
  • the second information is used to configure and/or indicate the number of repetitions and/or the number of synchronization signal blocks (SSB) indices sent by the PRACH.
  • SSB synchronization signal blocks
  • a repetition number is configured for the PRACH transmission; or, multiple repetition numbers are configured for the PRACH transmission, wherein one of the multiple repetition numbers corresponds to a first number.
  • the first number is equal to the configured repetition number, or, the first number is an integer multiple of the configured repetition number, or, the first number is the least common multiple of the SSB index number and the configured repetition number.
  • only one number of multiple PRACH transmissions may be configured, or multiple numbers of multiple PRACH transmissions may be configured, and different numbers of multiple PRACH transmissions correspond to different values of K.
  • the features of different numbers of multiple PRACH transmissions correspond to common/separate configuration of PRACH occasions, or different numbers of multiple PRACH transmissions are on shared ROs/separate ROs.
  • the K value may be equal to the configured number of multiple PRACH transmissions, or the K value may be an integer multiple of the configured number of multiple PRACH transmissions, or the K value may be the least common multiple of the SSB index number and the repetition number; the present application is not limited thereto.
  • N ROs with similar time domain positions of the same SSB can be associated to form an RO group, where N is the repetition number of multiple PRACH transmissions of the configuration of PRACH occasion.
  • FIG6 is another example diagram of the association pattern period of an embodiment of the present application.
  • the number of SSB indexes is 4.
  • the PRACH configuration and the configurations such as SSB and preamble it can be known that: in an association pattern period, there are 2 valid ROs associated with the same SSB in the time domain, of which the ROs marked in gray are invalid ROs or unused ROs.
  • the ROs constituting RO group 1 are the 4 ROs closest in the time domain associated with SSB 0
  • the ROs constituting RO group 2 are the 4 ROs closest in the time domain associated with SSB 0.
  • N ROs with the same SSB mapped and the same relative position in the time domain form an RO group.
  • the relative position in the time domain is: the relative position of the RO relative to the starting position in the association pattern period in the time domain, where N is the repetition number of multiple PRACH transmissions in the configuration of PRACH occasion.
  • FIG. 7 is another example diagram of the association pattern period of an embodiment of the present application.
  • the number of SSB indexes is 4.
  • the PRACH configuration and the configurations such as SSB and preamble it can be known that: there are 2 valid ROs associated with the same SSB in the time domain in an association pattern period, of which the ROs marked in gray are invalid ROs or unused ROs.
  • the ROs constituting RO group 1 are the 4 ROs with the same relative position in the time domain and associated with SSB 0 in each association pattern period
  • the ROs constituting RO group 2 are the 4 ROs with the same relative position in the time domain and associated with SSB 0 in each association pattern period.
  • multiple repetition numbers are configured for the PRACH transmission, wherein the multiple repetition numbers correspond to a first number.
  • the first number is equal to the maximum value of the multiple repetition numbers configured, or the first number is an integer multiple of the maximum value of the multiple repetition numbers configured, or the first number is the least common multiple of the multiple repetition numbers configured, or the first number is the number of the multiple repetition numbers configured, or the first number is the SSB index number and the multiple repetition numbers configured. The least common multiple of numbers.
  • multiple numbers of multiple PRACH transmissions may be configured, and the K value corresponds to all configured numbers of multiple PRACH transmissions; wherein features of different numbers of multiple PRACH transmissions correspond to common/separate configuration of PRACH occasions, or different numbers of multiple PRACH transmissions are on shared ROs/separate ROs.
  • the configured multiple number of multiple PRACH transmissions are on shared ROs.
  • FIG8 is another example diagram of the association pattern period of the embodiment of the present application.
  • the PRACH configuration according to the PRACH configuration and the configurations such as SSB and preamble, it can be known that: there are 4 valid ROs associated with the same SSB in the time domain in one association pattern period.
  • the 4 association pattern periods can be determined as a repeatable pattern for associating SSBs with RO groups.
  • the number of SSBs is 4.
  • Valid ROs associated with SSB 0 can form RO groups associated with SSB 0.
  • four valid ROs close in time domain position in FIG8 form one RO group, as shown by the four ROs in block 801 in FIG8 .
  • two valid ROs close in time domain position in FIG8 form one RO group, as shown by the two ROs in block 802 in FIG8 .
  • the multiple PRACH transmissions with a repetition number of 2 and the multiple PRACH transmissions with a repetition number of 4 are on shared ROs.
  • FIG9 is another example diagram of the association pattern period of an embodiment of the present application.
  • the number of SSB indexes is 4.
  • the corresponding separate ROs in different frequency domains are obtained.
  • valid ROs associated with SSB 0/1 can form RO groups associated with SSB 0/1.
  • Four valid ROs close in time domain position in FIG9 form an RO group, as shown by the four ROs in block 901 in FIG9 .
  • valid ROs associated with SSB 0/1 can form RO groups associated with SSB 0/1.
  • Two ROs close in time domain position in FIG9 form an RO group, as shown by the two ROs in block 902 in FIG9 .
  • the first number is a default or fixed value.
  • the K value is a value in the candidate set.
  • the K value is one of the candidate values in the set, and the K value is the value of the minimum association pattern periods for each SSB index to be associated with at least one RO group.
  • the candidate value set of K is the first set.
  • the candidate value set of K is the second set.
  • the association pattern period value pair and the corresponding K value are shown in Table 2 below.
  • the K value is the minimum value that can ensure that all SSBs are associated with the RO group.
  • FIG10 is another example diagram of the association pattern period of an embodiment of the present application.
  • the number of SSB indexes is 4.
  • a PRACH configuration period is 10 ms
  • there are 8 PRACH configuration periods in an association pattern period so it is 80 ms
  • This PRACH configuration is used for multiple PRACH transmissions with a repetition number of 4.
  • the candidate value set of K is ⁇ 1,2,4,8 ⁇ .
  • the candidate value set of K is ⁇ 1,2,4,8 ⁇ .
  • four ROs associated with the same SSB in the time domain form an RO group, as shown in Figure 10.
  • At least two association pattern periods can ensure that all SSBs are associated with one RO group, and the K value is 2.
  • K is the minimum value that makes the number of ROs in the time domain in time period X form at least one RO group, or K is the minimum value that makes the number of ROs associated with the same SSB index in the time domain in time period X greater than or equal to the number of multiple PRACH transmissions.
  • FIG11 is another example diagram of the association pattern period of the embodiment of the present application.
  • the number of SSB indexes is 8.
  • a PRACH configuration period is 10ms
  • 4 SSBs can be mapped in a PRACH configuration period.
  • An association pattern period is composed of 2, 4, and 2 association periods respectively, and an association pattern period is 80ms.
  • the repetition number of multiple PRACH transmission is 2, it can be seen from Figure 11 that one The number of ROs associated with the same SSB index in the association pattern period is 3, which is greater than the repetition number 2 of multiple PRACH transmission. Therefore, at least ROs in one association pattern period can form an RO group. Then, the time period X is one association pattern period, that is, K is 1.
  • invalid ROs are ROs that conflict with SSB burst or UL/DL TDD configuration. Invalid ROs are represented by gray blocks in Figure 11. Unused ROs are RO sets that cannot map 8 SSB indexes, that is, cannot form an SSB-to-RO mapping cycle. Unused ROs are represented by grid blocks in Figure 11.
  • the PRACH resource configuration of the embodiment of the present application is further described below.
  • the K value can be obtained from these configurations, and then the time period X can be determined.
  • the time periods of all PRACH configurations correspond to the first number; or,
  • a PRACH configuration having PRACH transmission, and all the feature combinations correspond to multiple PRACH transmissions with different numbers of repetitions, and the time period of the PRACH transmission corresponding to all the feature combinations corresponds to the first number;
  • a PRACH configuration having PRACH transmission, and one of the feature combinations corresponds to multiple PRACH transmissions with different numbers of repetitions, and a time period of the PRACH transmission corresponding to the one feature combination corresponds to the first number;
  • the time period of the PRACH transmission corresponding to the one feature corresponds to the first number.
  • FIG 12 is an example diagram of a PRACH configuration according to an embodiment of the present application.
  • the PRACH configuration may include BWP-UplinkCommon, AdditionalRACH-Config, rach-ConfigCommon, featureCombinationPreambles, etc.
  • BWP-UplinkCommon BWP-UplinkCommon
  • AdditionalRACH-Config a PRACH configuration
  • rach-ConfigCommon a PRACH configuration according to an embodiment of the present application.
  • featureCombinationPreambles etc.
  • one K value or multiple K values may be determined, that is, one time period X or multiple time period X.
  • the multiple PRACH transmissions and repetition numbers applicable to the rach-ConfigCommon of different AdditionalRACH-Configs in BWP-UplinkCommon may be different.
  • All featureCombinationPreambles in rach-ConfigCommon in AdditionalRACH-Config may determine one K value or multiple K values, that is, one time period X or multiple time periods X.
  • the features or feature combinations of different featureCombinationPreambles in rach-ConfigCommon may be applicable to multiple PRACH transmissions and the repetition number may be different.
  • a featureCombinationPreambles in rach-ConfigCommon in the AdditionalRACH-Config can determine one K value or multiple K values, that is, one time period X or multiple time period X.
  • the feature combination of a featureCombinationPreambles is multiple PRACH transmission with different repetition numbers.
  • the first quantity is obtained according to the first information and/or the second information, or the first quantity is obtained according to the first information and a default value or a fixed value, or the first quantity is obtained according to the second information and a default value or a fixed value; the first information is used to configure and/or indicate the first quantity, and the second information is used to configure and/or indicate the number of repetitions and/or the number of synchronization signal blocks (SSB) indexes sent by the PRACH.
  • SSB synchronization signal blocks
  • the K value directly configured by the network device can be combined with the default K value.
  • the K value directly configured by the network device can be combined with the default K value.
  • time period X is determined according to the configured K value, and the association pattern duration between SSB and RO groups is K association pattern periods;
  • time period X is determined according to the default K value, and the association pattern between SSB and RO groups lasts for K association pattern periods, or, K is the minimum value in the set of candidate values that associates at least one RO group to each SSB index.
  • the K value can be directly configured by the network device and combined with other parameters to obtain the K value.
  • the K value can be directly configured by the network device and combined with other parameters to obtain the K value. For example, for multiple PRACH transmission, there are K association pattern periods in time period X;
  • time period X is determined according to the configured K value, and the association pattern duration between SSB and RO groups is K association pattern periods;
  • Multiple PRACH transmissions use separate configuration of PRACH occasions, or, for random access procedures, feature indication is multiple PRACH with repetition number N. transmissions, the K value is the repetition number of the multiple PRACH transmissions, or,
  • Multiple PRACH transmissions use separate configuration of PRACH occasions, or, multiple PRACH transmissions with different repetition numbers use common configuration of PRACH occasions, or, for the feature indication of the random access process as multiple PRACH transmissions, the K value is the maximum value of the repetition number configured for the multiple PRACH transmissions.
  • the signaling can be combined with a parameter indicating the number of multiple PRACH transmissions, and the K value is a multiple of the number of multiple PRACH transmissions.
  • Table 3 shows an example of signaling combined with other parameters.
  • the first number of associated pattern periods is the minimum duration capable of determining a repeated PRACH opportunity group pattern (RO group pattern); for PRACH opportunities (RO) that cannot or do not need to constitute the PRACH opportunity group in the associated pattern period, an SSB index is not mapped on the PRACH opportunity (RO) or PRACH transmission is not performed on the PRACH opportunity (RO).
  • RO group pattern a repeated PRACH opportunity group pattern
  • an SSB index is not mapped on the PRACH opportunity (RO) or PRACH transmission is not performed on the PRACH opportunity (RO).
  • the PRACH transmissions not performed on the PRACH opportunity (RO) include at least multiple PRACH transmissions.
  • the ROs are at least not used for multiple PRACH transmissions and can be used for single PRACH transmissions.
  • FIG. 13 is another example diagram of the association pattern period of an embodiment of the present application, where the network device directly configures the K value
  • the number of SSB indexes is 2.
  • this PRACH configuration is used for multiple PRACH transmissions with a repetition number of 4, then one RO group associated with the same SSB can be determined within one association pattern period.
  • the first 4 valid ROs associated with SSB 0 can form 1 RO group.
  • the two ROs marked in gray and associated with SSB 0 in the association pattern period can no longer form an RO group with multiple PRACH transmissions of 4, so these two ROs are no longer associated with SSB or are no longer used for PRACH transmissions.
  • 1 association pattern period can be determined as a repeatable pattern that associates SSB and RO.
  • the candidate values of K are ⁇ 1,2,3,4 ⁇ , and the gNB will configure the value in the candidate value set, that is, K is 1.
  • FIG14 is another example diagram of the association pattern period of an embodiment of the present application, taking the direct configuration of the K value by the network device as an example.
  • the number of SSB indexes is 2.
  • the PRACH configuration and the configurations of SSB and preamble it can be known that: there are 6 valid ROs associated with the same SSB in the time domain in an association pattern period.
  • the PRACH configuration is used for multiple PRACH transmissions with a repetition number of 8, then one RO group associated with the same SSB can be determined within two association pattern periods.
  • the first 6 valid ROs associated with SSB 0 can form 1 RO group.
  • the 4 ROs marked in gray in the association pattern period and associated with SSB 0 can no longer form an RO group with multiple PRACH transmissions of 8, so these 4 ROs are no longer associated with SSB or are no longer used for PRACH transmissions.
  • 1 association pattern period can be determined as a repeatable pattern that associates SSB and RO.
  • the candidate values of K are ⁇ 1,2,3,4 ⁇ , and the gNB will configure the value in the candidate value set, that is, K is 2.
  • the first number of associated pattern periods is the minimum duration capable of determining a repeated PRACH opportunity group pattern (RO group pattern); all valid PRACH opportunities (RO) in the first number of associated pattern periods are used for the PRACH transmission.
  • the PRACH transmission is multiple PRACH transmission, that is, the same preamble is repeatedly sent in the PRACH transmission, but the present application is not limited to this, and the PRACH transmission can also use other names.
  • FIG15 is another example diagram of the association pattern period of an embodiment of the present application, taking the network device directly configuring the K value as an example.
  • the number of SSB indexes is 2.
  • this PRACH configuration is used for multiple PRACH transmissions with a repetition number of 4, so one RO group associated with the same SSB can be determined in one association pattern period.
  • the first 4 valid ROs associated with SSB 0 can form one RO group (RO group 1).
  • the last 2 ROs associated with SSB 0 in this association pattern period can form an RO group (RO group 2) with the first 2 ROs associated with SSB 0 in the next association pattern period, and the remaining 4 ROs associated with SSB 0 in the second association pattern period can form an RO group (RO group 3).
  • two association pattern periods can be determined as repeatable patterns for associating SSBs with ROs.
  • the candidate values of K are ⁇ 1,2,3,4 ⁇ , and the gNB will configure the value in the candidate value set, that is, K is 2.
  • the SSB index is not mapped on the PRACH opportunity (RO) or PRACH transmission is not performed on the PRACH opportunity (RO).
  • N ROs can form a complete RO group. After forming an integer number of RO groups, multiple ROs within the time period may still have one or more ROs remaining. If these ROs cannot form an RO group that maps all SSB indexes, SSB indexes are not mapped on these ROs or PRACH is not sent on these ROs.
  • the PRACH transmission not performed on the PRACH opportunity (RO) is a multiple PRACH transmission.
  • the ROs are at least not used for multiple PRACH transmissions, but can be used for single PRACH transmissions.
  • FIG. 16 is another example diagram of the association pattern period of the embodiment of the present application.
  • the number of SSB indexes (third quantity) is 8.
  • a PRACH configuration period is 10 ms
  • a PRACH configuration period can map 4 SSBs.
  • An association pattern period is composed of 2, 4, and 2 association periods respectively, and an association pattern period is 80 ms.
  • the repetition number of multiple PRACH transmission is 2, as shown in Figure 16, the number of ROs associated with the same SSB index in one association pattern period is 3, which is greater than the repetition number 2 of multiple PRACH transmission. Therefore, at least one association pattern period ROs can form an RO group, then the time period X is 1 association pattern period, that is, K is 1.
  • Figure 16 uses slash blocks to represent ROs that are not used for multiple PRACH transmission.
  • Invalid ROs are ROs that conflict with SSB burst or UL/DL TDD configuration. Invalid ROs are represented by gray blocks in Figure 16.
  • Unused ROs are RO sets that cannot map 8 SSB indexes, that is, they cannot form an SSB-to-RO mapping cycle. Grid blocks are used in Figure 16 to represent unused ROs.
  • Figure 17 is another example diagram of the association pattern period of an embodiment of the present application.
  • the number of SSB indexes is 8. If the repetition number of multiple PRACH transmission is 4, it can be seen from Figure 17 that the number of ROs associated with the same SSB index in one association pattern period is 3. At least ROs in 2 association pattern periods can form an RO group, then time period X is 2 association pattern periods, that is, K is 2.
  • Figure 17 uses slash blocks to represent ROs that are not used for multiple PRACH transmission.
  • Invalid ROs are ROs that conflict with SSB burst or UL/DL TDD configuration. Invalid ROs are represented by gray blocks in Figure 17.
  • Unused ROs are RO sets that cannot map 8 SSB indexes, that is, cannot form an SSB-to-RO mapping cycle. Grid blocks are used in Figure 17 to represent unused ROs.
  • the maximum value of the first number is Kmax; the maximum value of the time period is Tmax, and the unit of the time period is, for example, milliseconds (ms).
  • Kmax is a default fixed value or is indicated by the base station.
  • K is the maximum value of the configured numbers of multiple PRACH transmissions, and the maximum value will not exceed Kmax.
  • the terminal device can quickly obtain RO resources for sending multiple PRACH transmissions and ensure the sending of multiple PRACH transmissions, thereby improving the coverage capability of the system.
  • different SSB and RO group mapping pattern repetition periods can be used for different multiple PRACH transmissions configurations. For scenarios where transmission delay needs to be reduced, all SSBs can be mapped to The repetition period of the RO group is minimal, thereby reducing the transmission interval and/or duration of multiple PRACH transmissions and the time for the base station to detect PRACH, thereby reducing the transmission delay of multiple PRACH transmissions.
  • RO resources for transmitting multiple PRACH transmissions can be utilized as much as possible, thereby improving the resource utilization of PRACH transmission.
  • the terminal device determines a second number of ROs associated with a time period, where the time period is an association pattern period of the first number of SSBs and ROs.
  • the terminal device can quickly obtain RO resources sent by multiple PRACHs, and ensure that all SSBs in multiple PRACH transmissions are mapped to ROs, thereby improving the coverage capability of the system.
  • the embodiment of the present application provides a PRACH receiving method, which is described from the perspective of a network device.
  • the embodiment of the second aspect can be combined with the embodiment of the first aspect, and the same contents as those of the embodiment of the first aspect will not be repeated.
  • FIG. 18 is a schematic diagram of a PRACH receiving method according to an embodiment of the present application. As shown in FIG. 18 , the method includes:
  • the network device receives a preamble repeatedly sent by the terminal device on a second number of ROs;
  • the terminal device determines the second number of ROs associated with the time period, and the time period is an association pattern period (SSB-to-RO association pattern period) of the first number of synchronization signal blocks (SSBs) and PRACH opportunities (ROs).
  • SSB-to-RO association pattern period association pattern period of the first number of synchronization signal blocks (SSBs) and PRACH opportunities (ROs).
  • the method may further include:
  • the network device sends PRACH configuration information and/or indication information to the terminal device.
  • FIG. 18 is only a schematic illustration of the embodiment of the present application, but the present application is not limited thereto.
  • the execution order between the various operations can be appropriately adjusted, and other operations can be added or some operations can be reduced.
  • Those skilled in the art can make appropriate modifications based on the above content, and are not limited to the description of the above FIG. 18.
  • the time period is based on a separate PRACH opportunity configuration and/or Or a valid PRACH opportunity (valid RO) configured by a common PRACH occasion configuration (configuration of PRACH occasion) is determined.
  • the second number N is the repetition number of the PRACH transmission, and N is a positive integer greater than 1.
  • features or combination of features transmitted by PRACH with different numbers of repetitions correspond to separate PRACH opportunity configurations, or features or combination of features transmitted by PRACH with different numbers of repetitions correspond to common PRACH opportunity configurations.
  • the first number K is configured and/or indicated by first information from a network device, the first information includes radio resource control (RRC) signaling and/or MAC CE and/or downlink control information, and K is a positive integer.
  • RRC radio resource control
  • the first number configured and/or indicated by the network device is a value in a set of candidate values.
  • a first association pattern period corresponds to a first candidate value set
  • a second association pattern period corresponds to a second candidate value set
  • the first association pattern period is different from the second association pattern period
  • the first number is obtained based on at least second information
  • the second information is used to configure and/or indicate the number of repetitions and/or the number of synchronization signal blocks (SSB) indices sent by the PRACH.
  • SSB synchronization signal blocks
  • one repetition number is configured for the PRACH transmission; or, multiple repetition numbers are configured for the PRACH transmission, wherein one repetition number among the multiple repetition numbers corresponds to a first quantity.
  • the first number is equal to the configured repetition number, or the first number is an integer multiple of the configured repetition number, or the first number is the least common multiple of the SSB index number and the configured repetition number.
  • multiple repetition numbers are configured for the PRACH transmission, wherein the multiple repetition numbers correspond to a first quantity.
  • the first number is equal to the maximum value of the multiple repetition numbers configured, or the first number is an integer multiple of the maximum value of the multiple repetition numbers configured, or the first number is the least common multiple of the multiple repetition numbers configured, or the first number is the number of the multiple repetition numbers configured, or the first number is the SSB index number and the multiple repetition numbers configured.
  • the first number is a default or fixed value.
  • the first number is the minimum value that enables the number of ROs in the time domain in the time period to form at least one RO group, or the first number is the minimum value that enables the number of ROs associated with the same SSB index in the time domain in the time period to be greater than or equal to the number of repetitions sent by the PRACH.
  • the first quantity is obtained according to the first information and/or the second information, or the first quantity is obtained according to the first information and a default value or a fixed value, or the first quantity is obtained according to the second information and a default value or a fixed value;
  • the first information is used to configure and/or indicate the first quantity
  • the second information is used to configure and/or indicate the number of repetitions and/or the number of synchronization signal blocks (SSB) indexes sent by the PRACH.
  • SSB synchronization signal blocks
  • the first number of associated pattern periods is a minimum duration capable of determining a repeated PRACH opportunity group pattern (RO group pattern);
  • the SSB index is not mapped on the PRACH opportunity (RO) or PRACH is not sent on the PRACH opportunity (RO).
  • the first number of associated pattern periods is a minimum duration capable of determining a repeated PRACH opportunity group pattern (RO group pattern);
  • the SSB index is not mapped on the PRACH opportunity (RO) or PRACH transmission is not performed on the PRACH opportunity (RO).
  • the PRACH transmission not performed on the PRACH opportunity (RO) is a multiple PRACH transmission (multiple PRACH transmission).
  • the time periods of all PRACH configurations correspond to the first number; or,
  • the corresponding features of all the feature combinations are
  • the time period of PRACH transmission corresponds to the first number
  • a PRACH configuration having PRACH transmission, and one of the feature combinations corresponds to a plurality of PRACH transmissions with different numbers of repetitions, and a time period of the PRACH transmission corresponding to the one feature combination corresponds to the first number;
  • the time period of the PRACH transmission corresponding to the one feature corresponds to the first number.
  • the maximum value of the first number is Kmax; the maximum value of the time period is Tmax, and the unit of the time period is, for example, milliseconds (ms).
  • the terminal device determines a second number of ROs associated with a time period, where the time period is an association pattern period of the first number of SSBs and ROs.
  • the terminal device can quickly obtain RO resources sent by multiple PRACHs, and ensure that all SSBs in multiple PRACH transmissions are mapped to ROs, thereby improving the coverage capability of the system.
  • the embodiment of the present application provides a PRACH sending device.
  • the device may be, for example, a terminal device, or may be one or more components or assemblies configured in the terminal device, and the contents that are the same as those in the embodiment of the first aspect are not repeated here.
  • FIG19 is a schematic diagram of a PRACH transmitting apparatus according to an embodiment of the present application.
  • a PRACH transmitting apparatus 1900 includes:
  • a processing unit 1901 is configured to determine a second number of ROs associated with a time period, wherein the time period is an association pattern period (SSB-to-RO association pattern period) of a first number of synchronization signal blocks (SSBs) and PRACH opportunities (ROs);
  • SSB-to-RO association pattern period association pattern period
  • ROs PRACH opportunities
  • the sending unit 1902 is configured to repeatedly send a preamble on the second number of ROs.
  • the time period is based on a configuration of separate PRACH occasions and/or a common PRACH occasion configuration.
  • the valid PRACH opportunity (valid RO) is determined.
  • the second number N is the repetition number of the PRACH transmission, and N is a positive integer greater than 1.
  • features or combination of features transmitted by PRACH with different numbers of repetitions correspond to separate PRACH opportunity configurations, or features or combination of features transmitted by PRACH with different numbers of repetitions correspond to common PRACH opportunity configurations.
  • the first number K is configured and/or indicated by first information from a network device, the first information includes radio resource control (RRC) signaling and/or MAC CE and/or downlink control information, and K is a positive integer.
  • RRC radio resource control
  • the first number configured and/or indicated by the network device is a value in a set of candidate values.
  • a first association pattern period corresponds to a first candidate value set
  • a second association pattern period corresponds to a second candidate value set
  • the first association pattern period is different from the second association pattern period
  • the first number is obtained based on at least second information
  • the second information is used to configure and/or indicate the number of repetitions and/or the number of synchronization signal blocks (SSB) indices sent by the PRACH.
  • SSB synchronization signal blocks
  • one repetition number is configured for the PRACH transmission; or, multiple repetition numbers are configured for the PRACH transmission, wherein one repetition number among the multiple repetition numbers corresponds to a first quantity.
  • the first number is equal to the configured repetition number, or the first number is an integer multiple of the configured repetition number, or the first number is the least common multiple of the SSB index number and the configured repetition number.
  • multiple repetition numbers are configured for the PRACH transmission, wherein the multiple repetition numbers correspond to a first quantity.
  • the first number is equal to the maximum value of the multiple configured repetition numbers, or the first number is an integer multiple of the maximum value of the multiple configured repetition numbers, or the first number is the least common multiple of the multiple configured repetition numbers, or the first number is the number of the multiple configured repetition numbers, or the first number is the least common multiple of the SSB index number and the multiple configured repetition numbers.
  • the first number is a default or fixed value.
  • the first number is the minimum value that enables the number of ROs in the time domain in the time period to form at least one RO group, or the first number is the minimum value that enables the number of ROs associated with the same SSB index in the time domain in the time period to be greater than or equal to the number of repetitions sent by the PRACH.
  • the first quantity is obtained according to the first information and/or the second information, or the first quantity is obtained according to the first information and a default value or a fixed value, or the first quantity is obtained according to the second information and a default value or a fixed value;
  • the first information is used to configure and/or indicate the first quantity
  • the second information is used to configure and/or indicate the number of repetitions and/or the number of synchronization signal blocks (SSB) indexes sent by the PRACH.
  • SSB synchronization signal blocks
  • the first number of associated pattern periods is a minimum duration capable of determining a repeated PRACH opportunity group pattern (RO group pattern);
  • the SSB index is not mapped on the PRACH opportunity (RO) or PRACH is not sent on the PRACH opportunity (RO).
  • the first number of associated pattern periods is a minimum duration capable of determining a repeated PRACH opportunity group pattern (RO group pattern);
  • the SSB index is not mapped on the PRACH opportunity (RO) or PRACH transmission is not performed on the PRACH opportunity (RO).
  • the PRACH transmission not performed on the PRACH opportunity (RO) is a multiple PRACH transmission (multiple PRACH transmission).
  • the time periods of all PRACH configurations correspond to the first number; or,
  • a PRACH configuration having PRACH transmission, and all the feature combinations correspond to multiple PRACH transmissions with different numbers of repetitions, and the time period of the PRACH transmissions corresponding to all the feature combinations corresponds to the first number;
  • a PRACH configuration having PRACH transmission, and one of the feature combinations corresponds to a plurality of PRACH transmissions with different numbers of repetitions, and a time period of the PRACH transmission corresponding to the one feature combination corresponds to the first number;
  • the time period of the PRACH transmission corresponding to the one feature corresponds to the first number.
  • the maximum value of the first number is Kmax; the maximum value of the time period is Tmax.
  • the PRACH transmitting apparatus 1900 may further include:
  • the receiving unit 1903 receives PRACH configuration information and/or indication information sent by the network device.
  • the PRACH transmitting device 1900 may also include other components or modules, and the specific contents of these components or modules may refer to the relevant technology.
  • FIG. 19 only exemplifies the connection relationship or signal direction between various components or modules, but it should be clear to those skilled in the art that various related technologies such as bus connection can be used.
  • the above-mentioned various components or modules can be implemented by hardware facilities such as processors, memories, transmitters, and receivers; the implementation of this application is not limited to this.
  • the terminal device determines a second number of ROs associated with a time period, where the time period is an association pattern period of the first number of SSBs and ROs.
  • the terminal device can quickly obtain RO resources sent by multiple PRACHs, and ensure that all SSBs in multiple PRACH transmissions are mapped to ROs, thereby improving the coverage capability of the system.
  • the embodiment of the present application provides a PRACH receiving device.
  • the device may be, for example, a network device, or may be one or more components or assemblies configured in the network device, and the contents that are the same as those in the first and second aspects of the embodiments are not repeated here.
  • FIG20 is a schematic diagram of a PRACH receiving device according to an embodiment of the present application. As shown in FIG20 , a PRACH receiving device 2000 includes:
  • a receiving unit 2001 which receives a preamble repeatedly sent by a terminal device on a second number of ROs
  • the terminal device determines the second number of ROs associated with a time period, and the time period is an association pattern period (SSB-to-RO association pattern period) of a first number of synchronization signal blocks (SSBs) and PRACH opportunities (ROs).
  • SSB-to-RO association pattern period association pattern period of a first number of synchronization signal blocks (SSBs) and PRACH opportunities (ROs).
  • the PRACH receiving apparatus 2000 may further include:
  • the sending unit 2002 sends PRACH configuration information and/or indication information to the terminal device.
  • the PRACH receiving apparatus 2000 may also include other components or modules, and the specific contents of these components or modules may refer to the relevant technology.
  • FIG. 20 only exemplifies the connection relationship or signal direction between various components or modules, but it should be clear to those skilled in the art that various related technologies such as bus connection can be used.
  • the above-mentioned various components or modules can be implemented by hardware facilities such as processors, memories, transmitters, and receivers; the implementation of this application is not limited to this.
  • the terminal device determines a second number of ROs associated with a time period, where the time period is an association pattern period of the first number of SSBs and ROs.
  • the terminal device can quickly obtain RO resources sent by multiple PRACHs, and ensure that all SSBs in multiple PRACH transmissions are mapped to ROs, thereby improving the coverage capability of the system.
  • An embodiment of the present application also provides a communication system, and reference may be made to FIG1 .
  • the contents that are the same as those in the first to fourth embodiments will not be repeated herein.
  • the communication system 100 may include at least:
  • a terminal device which determines a second number of ROs associated with a time period, wherein the time period is an association pattern period (SSB-to-RO association pattern period) of the first number of synchronization signal blocks (SSBs) and PRACH opportunities (ROs);
  • SSB-to-RO association pattern period association pattern period
  • ROs PRACH opportunities
  • a network device receives the preamble repeatedly sent by the terminal device on the second number of ROs.
  • An embodiment of the present application further provides a network device, which may be, for example, a base station, but the present application is not limited thereto and may also be other network devices.
  • a network device which may be, for example, a base station, but the present application is not limited thereto and may also be other network devices.
  • FIG21 is a schematic diagram of the composition of a network device according to an embodiment of the present application.
  • the network device 2100 may include: a processor 2110 (eg, a central processing unit CPU) and a memory 2120; the memory 2120 is coupled to to the processor 2110.
  • the memory 2120 can store various data; in addition, it can also store a program 2130 for information processing, and execute the program 2130 under the control of the processor 2110.
  • the processor 2110 may be configured to execute a program to implement the PRACH receiving method as described in the embodiment of the second aspect.
  • the processor 2110 may be configured to perform the following control: receiving a preamble repeatedly sent by a terminal device on a second number of ROs;
  • the terminal device determines the second number of ROs associated with a time period, and the time period is an association pattern period (SSB-to-RO association pattern period) of a first number of synchronization signal blocks (SSBs) and PRACH opportunities (ROs).
  • SSB-to-RO association pattern period association pattern period of a first number of synchronization signal blocks (SSBs) and PRACH opportunities (ROs).
  • the network device 2100 may also include: a transceiver 2140 and an antenna 2150, etc.; wherein the functions of the above components are similar to those of the prior art and are not described in detail here. It is worth noting that the network device 2100 does not necessarily include all the components shown in FIG21; in addition, the network device 2100 may also include components not shown in FIG21, which may refer to the prior art.
  • the embodiment of the present application also provides a terminal device, but the present application is not limited thereto and may also be other devices.
  • FIG22 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • the terminal device 2200 may include a processor 2210 and a memory 2220; the memory 2220 stores data and programs and is coupled to the processor 2210. It is worth noting that the figure is exemplary; other types of structures may also be used to supplement or replace the structure to implement telecommunication functions or other functions.
  • the processor 2210 may be configured to execute a program to implement the PRACH transmission method as described in the embodiment of the first aspect.
  • the processor 2210 may be configured to perform the following control: determining a second number of ROs associated with a time period, the time period being an association pattern period (SSB-to-RO association pattern period) of a first number of synchronization signal blocks (SSBs) and PRACH opportunities (ROs); and repeatedly transmitting a preamble on the second number of ROs.
  • SSB-to-RO association pattern period association pattern period
  • ROs PRACH opportunities
  • the terminal device 2200 may further include: a communication module 2230, an input unit 2240, a display 2250, and a power supply 2260.
  • the functions of the above components are similar to those in the prior art and are not described in detail here. It is worth noting that the terminal device 2200 does not necessarily include all the components shown in FIG. 22 , and the above components are not necessary; in addition, the terminal device 2200 may also include components not shown in FIG. 22 , and reference may be made to the prior art.
  • An embodiment of the present application also provides a computer program, wherein when the program is executed in a terminal device, the program enables the terminal device to execute the PRACH sending method described in the embodiment of the first aspect.
  • An embodiment of the present application also provides a storage medium storing a computer program, wherein the computer program enables a terminal device to execute the PRACH sending method described in the embodiment of the first aspect.
  • An embodiment of the present application also provides a computer program, wherein when the program is executed in a network device, the program enables the network device to execute the PRACH reception method described in the embodiment of the second aspect.
  • An embodiment of the present application also provides a storage medium storing a computer program, wherein the computer program enables a network device to execute the PRACH reception method described in the embodiment of the second aspect.
  • the above devices and methods of the present application can be implemented by hardware, or by hardware combined with software.
  • the present application relates to such a computer-readable program, which, when executed by a logic component, enables the logic component to implement the above-mentioned devices or components, or enables the logic component to implement the various methods or steps described above.
  • the present application also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, etc.
  • the method/device described in conjunction with the embodiments of the present application may be directly embodied as hardware, a software module executed by a processor, or a combination of the two.
  • one or more of the functional block diagrams shown in the figure and/or one or more combinations of the functional block diagrams may correspond to various software modules of the computer program flow or to various hardware modules.
  • These software modules may correspond to the various steps shown in the figure, respectively.
  • These hardware modules may be implemented by solidifying these software modules, for example, using a field programmable gate array (FPGA).
  • FPGA field programmable gate array
  • the software module may be located in a RAM memory, a flash memory, a ROM memory, an EPROM memory, an EEPROM memory, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
  • a storage medium may be coupled to a processor so that the processor can read information from the storage medium and write information to the storage medium; or the storage medium may be an integral part of the processor.
  • the processor and the storage medium may be located in an ASIC.
  • the software module may be stored in a memory of a mobile terminal or in a memory card that can be inserted into the mobile terminal.
  • the software module may be stored in the MEGA-SIM card or the large-capacity flash memory device.
  • One or more of the functional blocks described in the drawings and/or one or more combinations of the functional blocks may be implemented as a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or any appropriate combination thereof for performing the functions described in the present application.
  • DSP digital signal processor
  • ASIC application-specific integrated circuit
  • FPGA field programmable gate array
  • One or more of the functional blocks described in the drawings and/or one or more combinations of the functional blocks may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, or one or more microprocessors in communication with a DSP. processor or any other such configuration.
  • a PRACH sending method comprising:
  • the terminal device determines a second number of ROs associated with a time period, wherein the time period is an association pattern period (SSB-to-RO association pattern period) of the first number of synchronization signal blocks (SSBs) and PRACH opportunities (ROs);
  • SSB-to-RO association pattern period association pattern period
  • ROs PRACH opportunities
  • the terminal device repeatedly sends a preamble on the second number of ROs.
  • time period is determined based on a valid PRACH opportunity (valid RO) configured by a separate PRACH opportunity configuration and/or a common PRACH opportunity configuration (configuration of PRACH occasion).
  • valid RO valid PRACH opportunity
  • N is a repetition number of the PRACH transmission, and N is a positive integer greater than 1;
  • features or combinations of features transmitted by PRACH with different numbers of repetitions correspond to separate PRACH opportunity configurations, or features or combinations of features transmitted by PRACH with different numbers of repetitions correspond to common PRACH opportunity configurations.
  • the first number K is configured and/or indicated by first information from a network device, the first information includes radio resource control (RRC) signaling and/or MACCE and/or downlink control information, and K is a positive integer.
  • RRC radio resource control
  • the second information is used to configure and/or indicate the number of repetitions and/or the number of synchronization signal blocks (SSB) indexes sent by the PRACH.
  • SSB synchronization signal blocks
  • a repetition number is configured for the PRACH transmission; or, multiple repetition numbers are configured for the PRACH transmission, wherein one repetition number among the multiple repetition numbers corresponds to a first quantity.
  • the first number is equal to the configured number of repetitions, or the first number is an integer multiple of the configured number of repetitions, or the first number is the least common multiple of the SSB index number and the configured number of repetitions.
  • the first number is equal to the maximum value of the multiple configured repetition numbers, or the first number is an integer multiple of the maximum value of the multiple configured repetition numbers, or the first number is the least common multiple of the multiple configured repetition numbers, or the first number is the number of the multiple configured repetition numbers, or the first number is the least common multiple of the SSB index number and the multiple configured repetition numbers.
  • a method according to any one of Notes 1 to 3, wherein the first number is a minimum value that enables the number of ROs in the time domain in the time period to form at least one RO group, or the first number is a minimum value that enables the number of ROs associated with the same SSB index in the time domain in the time period to be greater than or equal to the number of repetitions sent by the PRACH.
  • the first information is used to configure and/or indicate the first quantity
  • the second information is used to configure and/or indicate the number of repetitions and/or the number of synchronization signal blocks (SSB) indexes sent by the PRACH.
  • SSB synchronization signal blocks
  • the SSB index is not mapped on the PRACH opportunity (RO) or is not mapped on the PRACH opportunity group. (RO) performs PRACH transmission.
  • the time periods of all PRACH configurations correspond to the first number; or,
  • a PRACH configuration having PRACH transmission, and all the feature combinations correspond to multiple PRACH transmissions with different numbers of repetitions, and the time period of the PRACH transmissions corresponding to all the feature combinations corresponds to the first number;
  • a PRACH configuration having PRACH transmission, and one of the feature combinations corresponds to a plurality of PRACH transmissions with different numbers of repetitions, and a time period of the PRACH transmission corresponding to the one feature combination corresponds to the first number;
  • the time period of the PRACH transmission corresponding to the one feature corresponds to the first number.
  • a PRACH receiving method comprising:
  • the network device receives a preamble repeatedly sent by the terminal device on a second number of ROs
  • the terminal device determines the second number of ROs associated with the time period, where the time period is the association pattern period (SSB-to-RO) of the first number of synchronization signal blocks (SSBs) and PRACH opportunities (ROs). association pattern period).
  • SSB-to-RO association pattern period
  • SSBs first number of synchronization signal blocks
  • ROs PRACH opportunities
  • features or combinations of features transmitted by PRACH with different numbers of repetitions correspond to separate PRACH opportunity configurations, or features or combinations of features transmitted by PRACH with different numbers of repetitions correspond to common PRACH opportunity configurations.
  • the first number K is configured and/or indicated by first information from a network device, the first information includes radio resource control (RRC) signaling and/or MAC CE and/or downlink control information, and K is a positive integer.
  • RRC radio resource control
  • the first number is equal to the configured number of repetitions, or the first number is an integer multiple of the configured number of repetitions, or the first number is the least common multiple of the SSB index number and the configured number of repetitions.
  • the first number is equal to the maximum value of the multiple configured repetition numbers, or the first number is an integer multiple of the maximum value of the multiple configured repetition numbers, or the first number is the least common multiple of the multiple configured repetition numbers, or the first number is the number of the multiple configured repetition numbers, or the first number is the least common multiple of the SSB index number and the multiple configured repetition numbers.
  • the first information is used to configure and/or indicate the first quantity
  • the second information is used to configure and/or indicate the number of repetitions and/or the number of synchronization signal blocks (SSB) indexes sent by the PRACH.
  • SSB synchronization signal blocks
  • the SSB index is not mapped on the PRACH opportunity (RO) or PRACH is not sent on the PRACH opportunity (RO).
  • the time periods of all PRACH configurations correspond to the first number; or,
  • a PRACH configuration having PRACH transmission, and all the feature combinations correspond to multiple PRACH transmissions with different numbers of repetitions, and the time period of the PRACH transmissions corresponding to all the feature combinations corresponds to the first number;
  • a PRACH configuration having PRACH transmission, and one of the feature combinations corresponds to a plurality of PRACH transmissions with different numbers of repetitions, and a time period of the PRACH transmission corresponding to the one feature combination corresponds to the first number;
  • the time period of the PRACH transmission corresponding to the one feature corresponds to the first number.
  • a terminal device comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to implement the PRACH sending method as described in any one of Notes 1 to 20.
  • a network device comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to implement the PRACH reception method as described in any one of Notes 21 to 40.

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Abstract

本申请实施例提供一种PRACH发送和接收方法以及装置。所述方法包括：终端设备确定第二数量的与时间周期相关的RO，所述时间周期为第一数量的同步信号块(SSB)与PRACH机会(RO)的关联图样周期(SSB-to-RO association pattern period)；所述终端设备在所述第二数量的RO上重复发送前导(preamble)。

Description

PRACH发送和接收方法以及装置 技术领域
本申请实施例涉及通信技术领域。
背景技术
为了增强网络设备(例如基站)的上行覆盖，NR Rel-18研究通过多物理随机接入信道发送(multiple PRACH transmission)增强终端设备(UE)传输物理随机接入信道(PRACH，Physical Random Access Channel)的功率，从而使网络设备能够接收到处在覆盖能力较弱范围的终端设备所发送的PRACH，进而提高初始接入信道的覆盖，保证小区边缘的终端设备能够接入小区，从而提高系统的覆盖能力。
对于PRACH资源配置方案，在系统信息中会配置相关的PRACH资源信息，包括rach-ConfigCommon和additionalRACH-ConfigList-r17。网络设备通过无线资源控制(RRC，Radio Resource Control)信令配置PRACH的频域资源、PRACH配置索引(configuration Index)等PRACH资源信息。终端设备通过PRACH配置索引等查找表格，可以获得PRACH机会(RO)等时频资源相关信息。
应该注意，上面对技术背景的介绍只是为了方便对本申请的技术方案进行清楚、完整的说明，并方便本领域技术人员的理解而阐述的。不能仅仅因为这些方案在本申请的背景技术部分进行了阐述而认为上述技术方案为本领域技术人员所公知。
发明内容
发明人发现：终端设备在进行PRACH发送时，需要将同步信号块(SSB)映射到RO，对于单PRACH发送(single PRACH transmission)可以使用SSB到RO的关联周期(SSB-to-RO association period，也可简称为关联周期)和SSB到RO的关联图样周期(SSB-to-RO association pattern period，也可简称为关联图样周期)。
但是，对于多PRACH发送(multiple PRACH transmission)，需要在时域上的至少多个RO上重复发送前导(preamble)，因此目前的时间周期内不能够保证时域上映射相同SSB索引(index)的RO数量大于或等于多PRACH发送的重复数目(repetition number)，需要确定针对多PRACH发送的时间周期。
针对上述问题的至少之一，本申请实施例提供一种PRACH发送和接收方法以及 装置。
根据本申请实施例的一个方面，提供一种PRACH发送方法，包括：
终端设备确定第二数量的与时间周期相关的RO，所述时间周期为第一数量的同步信号块(SSB)与PRACH机会(RO)的关联图样周期(SSB-to-RO association pattern period)；
所述终端设备在所述第二数量的RO上重复发送前导(preamble)。
根据本申请实施例的另一个方面，提供一种PRACH发送装置，配置于终端设备，所述装置包括：
处理单元，其确定第二数量的与时间周期相关的RO，所述时间周期为第一数量的同步信号块(SSB)与PRACH机会(RO)的关联图样周期(SSB-to-RO association pattern period)；
发送单元，其在所述第二数量的RO上重复发送前导(preamble)。
根据本申请实施例的另一个方面，提供一种PRACH接收方法，包括：
网络设备接收终端设备在第二数量的RO上重复发送的前导(preamble)；
其中，所述终端设备确定所述第二数量的与时间周期相关的RO，所述时间周期为第一数量的同步信号块(SSB)与PRACH机会(RO)的关联图样周期(SSB-to-RO association pattern period)。
根据本申请实施例的另一个方面，提供一种PRACH接收装置，配置于网络设备，所述装置包括：
接收单元，其接收终端设备在第二数量的RO上重复发送的前导(preamble)；
其中，所述终端设备确定所述第二数量的与时间周期相关的RO，所述时间周期为第一数量的同步信号块(SSB)与PRACH机会(RO)的关联图样周期(SSB-to-RO association pattern period)。
根据本申请实施例的另一个方面，提供一种通信系统，包括：
终端设备，其确定第二数量的与时间周期相关的RO，所述时间周期为第一数量的同步信号块(SSB)与PRACH机会(RO)的关联图样周期(SSB-to-RO association pattern period)；
网络设备，其接收所述终端设备在所述第二数量的RO上重复发送的前导。
本申请实施例的有益效果之一在于：终端设备确定第二数量的与时间周期相关的 RO，所述时间周期为第一数量的SSB与RO的关联图样周期。由此，终端设备能够快速获得多PRACH发送的RO资源，并且保证多PRACH发送中所有SSB均被映射到RO，从而提高了系统的覆盖能力。
参照后文的说明和附图，详细公开了本申请的特定实施方式，指明了本申请的原理可以被采用的方式。应该理解，本申请的实施方式在范围上并不因而受到限制。在所附权利要求的精神和条款的范围内，本申请的实施方式包括许多改变、修改和等同。
针对一种实施方式描述和/或示出的特征可以以相同或类似的方式在一个或更多个其它实施方式中使用，与其它实施方式中的特征相组合，或替代其它实施方式中的特征。
应该强调，术语“包括/包含”在本文使用时指特征、整件、步骤或组件的存在，但并不排除一个或更多个其它特征、整件、步骤或组件的存在或附加。
附图说明
在本申请实施例的一个附图或一种实施方式中描述的元素和特征可以与一个或更多个其它附图或实施方式中示出的元素和特征相结合。此外，在附图中，类似的标号表示几个附图中对应的部件，并可用于指示多于一种实施方式中使用的对应部件。
图1是本申请实施例的通信系统的示意图；
图2是本申请实施例的PRACH发送方法的一示意图；
图3是本申请实施例的关联图样周期的一示例图；
图4是本申请实施例的关联图样周期的另一示例图；
图5是本申请实施例的关联图样周期的另一示例图；
图6是本申请实施例的关联图样周期的另一示例图；
图7是本申请实施例的关联图样周期的另一示例图；
图8是本申请实施例的关联图样周期的另一示例图；
图9是本申请实施例的关联图样周期的另一示例图；
图10是本申请实施例的关联图样周期的另一示例图；
图11是本申请实施例的关联图样周期的另一示例图；
图12是本申请实施例的关联图样周期的另一示例图；
图13是本申请实施例的关联图样周期的另一示例图；
图14是本申请实施例的关联图样周期的另一示例图；
图15是本申请实施例的关联图样周期的另一示例图；
图16是本申请实施例的关联图样周期的另一示例图；
图17是本申请实施例的PRACH配置的一示例图；
图18是本申请实施例的PRACH接收方法的一示意图；
图19是本申请实施例的PRACH发送装置的一示意图；
图20是本申请实施例的PRACH接收装置的一示意图；
图21是本申请实施例的网络设备的一示意图；
图22是本申请实施例的终端设备的一示意图。
具体实施方式
参照附图，通过下面的说明书，本申请的前述以及其它特征将变得明显。在说明书和附图中，具体公开了本申请的特定实施方式，其表明了其中可以采用本申请的原则的部分实施方式，应了解的是，本申请不限于所描述的实施方式，相反，本申请包括落入所附权利要求的范围内的全部修改、变型以及等同物。
在本申请实施例中，术语“第一”、“第二”等用于对不同元素从称谓上进行区分，但并不表示这些元素的空间排列或时间顺序等，这些元素不应被这些术语所限制。术语“和/或”包括相关联列出的术语的一种或多个中的任何一个和所有组合。术语“包含”、“包括”、“具有”等是指所陈述的特征、元素、元件或组件的存在，但并不排除存在或添加一个或多个其他特征、元素、元件或组件。
在本申请实施例中，单数形式“一”、“该”等包括复数形式，应广义地理解为“一种”或“一类”而并不是限定为“一个”的含义；此外术语“所述”应理解为既包括单数形式也包括复数形式，除非上下文另外明确指出。此外术语“根据”应理解为“至少部分根据……”，术语“基于”应理解为“至少部分基于……”，除非上下文另外明确指出。
在本申请实施例中，术语“通信网络”或“无线通信网络”可以指符合如下任意通信标准的网络，例如长期演进(LTE，Long Term Evolution)、增强的长期演进(LTE-A，LTE-Advanced)、宽带码分多址接入(WCDMA，Wideband Code Division Multiple Access)、高速报文接入(HSPA，High-Speed Packet Access)等等。
并且，通信系统中设备之间的通信可以根据任意阶段的通信协议进行，例如可以 包括但不限于如下通信协议：1G(generation)、2G、2.5G、2.75G、3G、4G、4.5G以及5G、新无线(NR，New Radio)、未来的6G等等，和/或其他目前已知或未来将被开发的通信协议。
在本申请实施例中，术语“网络设备”例如是指通信系统中将终端设备接入通信网络并为该终端设备提供服务的设备。网络设备可以包括但不限于如下设备：基站(BS，Base Station)、接入点(AP、Access Point)、发送接收点(TRP，Transmission Reception Point)、广播发射机、移动管理实体(MME、Mobile Management Entity)、网关、服务器、无线网络控制器(RNC，Radio Network Controller)、基站控制器(BSC，Base Station Controller)等等。
其中，基站可以包括但不限于：节点B(NodeB或NB)、演进节点B(eNodeB或eNB)以及5G基站(gNB)，IAB宿主等等，此外还可包括远端无线头(RRH，Remote Radio Head)、远端无线单元(RRU，Remote Radio Unit)、中继(relay)或者低功率节点(例如femeto、pico等等)。并且术语“基站”可以包括它们的一些或所有功能，每个基站可以对特定的地理区域提供通信覆盖。术语“小区”可以指的是基站和/或其覆盖区域，这取决于使用该术语的上下文。
在本申请实施例中，术语“用户设备”(UE，User Equipment)或者“终端设备”(TE，Terminal Equipment或Terminal Device)例如是指通过网络设备接入通信网络并接收网络服务的设备。终端设备可以是固定的或移动的，并且也可以称为移动台(MS，Mobile Station)、终端、用户台(SS，Subscriber Station)、接入终端(AT，Access Terminal)、站，等等。
其中，终端设备可以包括但不限于如下设备：蜂窝电话(Cellular Phone)、个人数字助理(PDA，Personal Digital Assistant)、无线调制解调器、无线通信设备、手持设备、机器型通信设备、膝上型计算机、无绳电话、智能手机、智能手表、数字相机，等等。
再例如，在物联网(IoT，Internet of Things)等场景下，终端设备还可以是进行监控或测量的机器或装置，例如可以包括但不限于：机器类通信(MTC，Machine Type Communication)终端、车载通信终端、设备到设备(D2D，Device to Device)终端、机器到机器(M2M，Machine to Machine)终端，等等。
此外，术语“网络侧”或“网络设备侧”是指网络的一侧，可以是某一基站，也可以 包括如上的一个或多个网络设备。术语“用户侧”或“终端侧”或“终端设备侧”是指用户或终端的一侧，可以是某一UE，也可以包括如上的一个或多个终端设备。本文在没有特别指出的情况下，“设备”可以指网络设备，也可以指终端设备。
以下通过示例对本申请实施例的场景进行说明，但本申请不限于此。
图1是本申请实施例的通信系统的示意图，示意性说明了以终端设备和网络设备为例的情况，如图1所示，通信系统100可以包括网络设备101和终端设备102、103。为简单起见，图1仅以两个终端设备和一个网络设备为例进行说明，但本申请实施例不限于此。
在本申请实施例中，网络设备101和终端设备102、103之间可以进行现有的业务或者未来可实施的业务发送。例如，这些业务可以包括但不限于：增强的移动宽带(eMBB，enhanced Mobile Broadband)、大规模机器类型通信(mMTC，massive Machine Type Communication)和高可靠低时延通信(URLLC，Ultra-Reliable and Low-Latency Communication)，等等。
值得注意的是，图1示出了两个终端设备102、103均处于网络设备101的覆盖范围内，但本申请不限于此。两个终端设备102、103可以均不在网络设备101的覆盖范围内，或者一个终端设备102在网络设备101的覆盖范围之内而另一个终端设备103在网络设备101的覆盖范围之外。
在本申请实施例中，高层信令例如可以是无线资源控制(RRC)信令；例如称为RRC消息(RRC message)，例如包括MIB、系统信息(system information)、专用RRC消息；或者称为RRC IE(RRC information element)。高层信令例如还可以是MAC(Medium Access Control)信令；或者称为MAC CE(MAC control element)。但本申请不限于此。
对于PRACH transmission，为了便于终端设备快速得到可以发送PRACH的时域资源，可以预先确定发送PRACH的SSB-RO映射的时域图样(pattern)，并在时域上重复该pattern。根据RO(PRACH occasion)的配置，可以获得PARCH发送的PRACH配置周期(configuration period)。
但是，一个PRACH configuration period由于与SSB或者下行信道冲突，可能会drop掉一些RO资源，不一定能够映射完所有的SSB，所以对于单PRACH发送(single PRACH transmission)定义了SSB到RO的关联周期(SSB-to-RO association period)， 保证至少映射完一遍所有的SSB索引(SSB index)。但是，SSB-to-RO association period形成的SSB-RO映射图样不一定保证在时域上可以重复，因此定义了SSB到RO关联图样周期(SSB-RO association pattern period)。
对于多PRACH发送(multiple PRACH transmission)，同样需要确定一个可以发送multiple PRACH transmission的SSB-RO映射的时域上重复的图样，便于终端设备能够快速获得multiple PRACH transmission的RO资源。
但是，multiple PRACH transmission需要在时域上的至少多个RO上重复发送前导(preamble)，针对single PRACH transmission定义的association pattern period不一定能够保证时域上映射相同SSB index的RO数量大于或等于多PRACH发送的重复数目，因此对采用legacy SSB-RO映射方式的multiple PRACH transmission，需要进一步确定能够重复的SSB-RO映射pattern的周期(或时间长度)。
在以下的说明中，在不引起混淆的情况下，术语“PRACH”和“物理随机接入信道”或“随机接入信息”可以互换，术语“PDCCH”和“物理下行控制信道”或“下行控制信息”可以互换，术语“PDSCH”和“物理下行数据信道”或“下行数据”也可以互换。
另外，发送(transmitting)或接收(receiving)PRACH可以理解为发送或接收由PRACH承载的随机接入信息；发送(transmitting)或接收(receiving)PDCCH可以理解为发送或接收由PDCCH承载的下行控制信息；发送或接收PDSCH可以理解为发送或接收由PDSCH承载的下行数据。前导(preamble)可以称为随机接入前导，也可称为PRACH前导。
第一方面的实施例
本申请实施例提供一种PRACH发送方法，从终端设备侧进行说明。图2是本申请实施例的PRACH发送方法的一示意图，如图2所示，该方法包括：
201，终端设备确定第二数量的与时间周期相关的RO，所述时间周期为第一数量的同步信号块(SSB)与PRACH机会(RO)的关联图样周期(SSB-to-RO association pattern period)；
202，所述终端设备在所述第二数量的RO上重复发送前导(preamble)。
值得注意的是，以上附图2仅对本申请实施例进行了示意性说明，但本申请不限于此。例如可以适当地调整各个操作之间的执行顺序，此外还可以增加其他的一些操 作或者减少其中的某些操作。本领域的技术人员可以根据上述内容进行适当地变型，而不仅限于上述附图2的记载。
在一些实施例中，时间周期(time period)X例如以毫秒(ms)为单位。所述第二数量N为所述PRACH发送的重复数目(repetition number)，N为大于1的正整数；终端设备在N个RO上重复发送前导，即N个RO上发送的是相同的前导。例如，发送相同前导的N个RO可以称为一个RO组(RO group)，即一个RO group包括N个RO，其中N为所述PRACH发送的重复数目。
本申请实施例针对的PRACH发送可称为多PRACH发送(multiple PRACH transmissions)，但不限于此，例如也可以使用其他称谓，例如MSG 1 repetion，PRACH repetition，multiple MSG1 transmissions等。此外，重复数目(repetition number)也可以称为多PRACH发送的数目(number of multiple PRACH transmissions)。
在一些实施例中，所述时间周期基于由分开(separate)的PRACH机会配置和/或公共(common)的PRACH机会配置(configuration of PRACH occasion)所配置的有效PRACH机会(valid RO)被确定。
例如，AdditionalRACH-Config-r17中的rach-ConfigCommon-r17所配置的PRACH资源为一个configuration of PRACH occasions。AdditionalRACH-Config-r17中的rach-ConfigCommon-r17所配置的PRACH资源(即configuration of PRACH occasions)只用于multiple PRACH transmission或者只有msg1-repetition(或用于multiple PRACH transmissions)一个feature，该separate configuration of PRACH occasions为multiple PRACH transmissions与其他feature的configuration of PRACH occasions或者single PRACH transmission的configuration of PRACH occasions之间是separate。
或者，AdditionalRACH-Config-r17中的rach-ConfigCommon-r17所配置的PRACH资源(即configuration of PRACH occasions)用于multiple PRACH transmission或者msg1-repetition(或用于multiple PRACH transmissions)的feature，以及用于redcap和/或smalldata和/或nsag和/或msg3-Repetition等其他feature，该configuration of PRACH occasions为multiple PRACH transmissions与其他feature的configuration of PRACH occasions或者single PRACH transmission的common configuration of PRACH occasions。
再例如，AdditionalRACH-Config-r17中的rach-ConfigCommon-r17所配置的 PRACH资源(即configuration of PRACH occasions)只用于multiple PRACH transmission或者只有msg1-repetition(或用于multiple PRACH transmissions)一个repetition number的feature，该separate configuration of PRACH occasions为该repetition number的multiple PRACH transmissions与其他repetition number的multiple PRACH transmission之间是separate。
或者，AdditionalRACH-Config-r17中的rach-ConfigCommon-r17所配置的PRACH资源(即configuration of PRACH occasions)用于multiple PRACH transmission或者msg1-repetition(或用于multiple PRACH transmissions)多个repetition number的feature，该configuration of PRACH occasions为多个repetition number的multiple PRACH transmissions的common configuration of PRACH occasions。
以上对本申请相关的PRACH配置进行了示例性说明，本申请不限于此，例如具体配置称谓可以改变，具有相同或相近功能或作用的配置或信令或信息等均在本申请的范围之内。
在一些实施例中，可以基于分开(separate)的PRACH机会配置所确定的有效RO确定时间周期，也可以基于公共(common)的PRACH机会配置所确定的有效RO确定时间周期。
在一些实施例中，具有不同重复数目的PRACH发送的特征(feature)或特征合并(combination of features)对应分开(separate)的PRACH机会配置，或者，具有不同重复数目的PRACH发送的特征(feature)或特征合并(combination of features)对应公共(common)的PRACH机会配置。
例如，可以由高层参数rach-ConfigCommon和msgA-ConfigCommon配置PRACH configuration，根据配置的PRACH configuration可以确定PRACH资源或者PRACH occasions资源。
例如，PRACH资源可以关联特征(feature)或者特征合并(combination of features)；feature或者combination of features由RRC参数指示，由PRACH configuration配置的PRACH资源或者PRACH occasions关联(或者用于)何种feature或者combination of features。
特征(feature)或者特征合并(combination of features)中可以具有MSG1 repetition/multiple PRACH transmission，例如feature或者combination of features是包 含multiple PRACH transmissions的feature，或者是具有不同number的multiple PRACH transmissions的feature。
例如，指示configuration of PRACH occasions的feature为repetition number 2的multiple PRACH transmissions，或者，features combination为repetition number 2和repetition number 4的combination。
再例如，分开(separate)的PRACH机会配置可以如下理解：feature或者combination of features为MSG1repetition/multiple PRACH transmission的configuration of PRACH occasions与single PRACH transmissions的configuration of PRACH occasions是分开的配置；或者，multiple PRACH transmissions与single PRACH transmissions是在separate ROs上区分的。
公共(common)的PRACH机会配置可以如下理解：feature或者combination of features为MSG1repetition/multiple PRACH transmission的configuration of PRACH occasions与single PRACH transmissions的configuration of PRACH occasions是相同的配置，或者是公共的(共享的)配置。或者，multiple PRACH transmissions与single PRACH transmissions是在shared ROs上区分的。
在本申请实施例中，有效RO(valid ROs)可以遵循38.213协议中valid RO的定义，例如与SSB不冲突且与SSB时间间隔不小于阈值的ROs，以及与TDD configuration中的下行时域单元等不冲突/不重叠的ROs；本申请不限于此。
以上示意性说明了PRACH资源，以下再对第一数量K进行说明。
在一些实施例中，所述第一数量K由来自网络设备的第一信息配置和/或指示，所述第一信息包括无线资源控制(RRC)信令和/或MAC CE和/或下行控制信息，K为正整数。
例如，网络设备可以通过SIB1中的信息指示K值。
在一些实施例中，由所述网络设备配置和/或指示的第一数量为候选值集合中的一个值。
例如，在SIB1中指示K值的候选值集合以及K值。K值例如可以配置在BWP-UplinkCommon中，或者，AdditionalRACH-Config中，或者，RACH-ConfigCommon中或者FeatureCombinationPreambles中；本申请不限于此。
例如，K值的候选值有{K1,K2,K3,…}，gNB从候选值集合中配置一个K值。
图3是本申请实施例的关联图样周期的一示例图，其中为了方便起见只示出了有效RO(valid RO)。如图3所示，SSB index个数为4。根据PRACH配置以及SSB和preamble等配置可知：一个association pattern period中时域上关联相同SSB的有8个valid ROs。且该PRACH configuration用于repetition number为4的multiple PRACH transmissions，则一个association pattern period内可以确定关联同一个SSB的2个RO groups，即，图3所示关联SSB 0的valid ROs可以组成2个RO groups(RO组1和RO组2)。如图3所示，1个association pattern period能够确定为关联SSB与RO的可重复的pattern。例如K值的候选值为{1,2,3,4}，gNB会配置候选值集合中的值，即K为1。
图4是本申请实施例的关联图样周期的另一示例图，其中为了方便起见只示出了有效RO(valid RO)。如图4所示，SSB index个数为8。根据PRACH配置以及SSB和preamble等配置可知：一个association pattern period中时域上关联相同SSB的有4个valid ROs。且该PRACH configuration用于repetition number为8的multiple PRACH transmissions，则2个association pattern period内可以确定关联同一个SSB的1个RO group，如图4所示关联SSB 0的valid ROs可以组成1个RO groups(RO组)。如图4所示，2个association pattern period能够确定为关联SSB与RO的可重复的pattern。例如K值的候选值为{1,2,3,4}，gNB会配置候选值集合中的值，即K为2。
在一些实施例中，第一关联图样周期对应第一候选值集合，第二关联图样周期对应第二候选值集合；所述第一关联图样周期不同于所述第二关联图样周期。
例如，association pattern period值对应的K值如下表1所示。
表1.Association pattern period与K值之间的对应关系
图5是本申请实施例的关联图样周期的另一示例图。如图5所示，SSB index个 数为8。根据PRACH配置以及SSB和preamble等配置可知：一个PRACH configuration period为10ms，一个PRACH configuration period中可以映射4个SSB。一个association pattern period分别由2,4,2个association period组成，一个association pattern period为80ms，通过上表1可知：可以配置的K值为{1,2,4,8,16}。图5中标记为灰色的ROs为无效RO(invalid ROs)或者不能映射SSB的ROs(可称为未使用RO)。
如图5所示，一个association pattern period中时域上关联相同SSB的有3个valid ROs。且该PRACH configuration用于repetition number为2的multiple PRACH transmissions，则2个association pattern period内可以确定关联同一个SSB的3个RO groups，如图5所示关联SSB 0的valid ROs组成3个RO groups(RO组1、RO组2和RO组3)。如图5所示，2个association pattern period能够确定为关联SSB与RO的可重复的pattern。例如K值的候选值为{1,2,3,4,8,16}，gNB会配置候选值集合中的值，即K为2。
以上示例性说明了网络设备直接配置K值的情况，以下再说明通过其他参数获得K值的情况。
在一些实施例中，所述第一数量至少根据第二信息而获得，所述第二信息用于配置和/或指示所述PRACH发送的重复数目和/或同步信号块(SSB)索引数目。
在一些实施例中，针对所述PRACH发送配置一个重复数目；或者，针对所述PRACH发送配置多个重复数目，其中所述多个重复数目中的一个重复数目对应一个第一数量。所述第一数量等于配置的重复数目，或者，所述第一数量为配置的重复数目的整数倍，或者，所述第一数量为所述SSB索引数目和配置的重复数目的最小公倍数。
例如，可以只配置一个number of multiple PRACH transmissions，或者，配置多个numbers of multiple PRACH transmissions，不同number of multiple PRACH transmissions分别对应一个K值。其中，不同number of multiple PRACH transmissions的feature对应common/separate configuration of PRACH occasions，或者，不同number of multiple PRACH transmissions是在shared ROs/separate ROs上。
这种情况下，K值可以等于所配置的number of multiple PRACH transmissions，或者，K值可以为所配置的number of multiple PRACH transmissions的整数倍，或者，K值为SSB index数与repetition number的最小公倍数；本申请不限于此。
例如，以K值等于所配置的number of multiple PRACH transmissions为例。可以关联相同SSB的时域位置相近的N个ROs组成一个RO group，其中N为该configuration of PRACH occasion的multiple PRACH transmissions的repetition number。
图6是本申请实施例的关联图样周期的另一示例图。如图6所示，SSB index个数为4。根据PRACH配置以及SSB和preamble等配置可知：一个association pattern period中时域上关联相同SSB的有2个valid ROs，其中标记为灰色的ROs为无效ROs或未使用ROs。且该PRACH configuration用于repetition number为4的multiple PRACH transmissions，则K值等于repetition number，即K＝4，该重复的RO groups pattern为4个association pattern period。其中组成RO group 1的ROs是关联SSB 0的时域上最相近的4个ROs，组成RO group 2的ROs是关联SSB 0的时域上最相近的4个ROs。
再例如，以K值等于所配置的number of multiple PRACH transmissions为例。每个association pattern period中映射相同SSB，时域相对位置相同的N个ROs组成一个RO group。其中时域相对位置为：RO相对于association pattern period时域上的起始位置的相对位置，其中N为该configuration of PRACH occasion的multiple PRACH transmissions的repetition number。
图7是本申请实施例的关联图样周期的另一示例图。如图7所示，SSB index个数为4。根据PRACH配置以及SSB和preamble等配置可知：一个association pattern period中时域上关联相同SSB的有2个valid ROs，其中标记为灰色的ROs为无效ROs或未使用ROs。且该PRACH configuration用于repetition number为4的multiple PRACH transmissions，则K值等于repetition number，即K＝4，该重复的RO groups pattern为4个association pattern period。其中组成RO group 1的ROs是每个association pattern period中时域上相对位置相同且关联SSB 0的4个ROs，组成RO group 2的ROs是每个association pattern period中时域上相对位置相同且关联SSB 0的4个ROs。
在一些实施例中，针对所述PRACH发送配置多个重复数目，其中所述多个重复数目对应一个第一数量。所述第一数量等于配置的所述多个重复数目中的最大值，或者，所述第一数量为配置的所述多个重复数目的最大值的整数倍，或者，所述第一数量为配置的所述多个重复数目的最小公倍数，或者，所述第一数量为配置的所述多个重复数目的数量，或者，所述第一数量为所述SSB索引数目和配置的所述多个重复 数目的最小公倍数。
例如，可以配置多个numbers of multiple PRACH transmissions，K值对应配置的所有numbers of multiple PRACH transmissions；其中，不同number of multiple PRACH transmissions的feature对应common/separate configuration of PRACH occasions，或者，不同number of multiple PRACH transmissions是在shared ROs/separate ROs上。
这种情况下，K值可以等于所配置的多个number of multiple PRACH transmissions中的最大值，或者，K值可以等于所配置的多个number of multiple PRACH transmissions中的最大值的整数倍，或者，K值可以等于所配置的多个number of multiple PRACH transmissions的最小公倍数，或者，K值可以等于所配置的number of multiple PRACH transmissions的数量(例如配置两个repetition number时K＝2)，或者，K值可以为SSB index数与repetition number的最小公倍数；本申请不限于此。
例如，以K值等于所配置的多个number of multiple PRACH transmissions中的最大值为例，对于配置的多个number of multiple PRACH transmissions是在shared ROs上。
图8是本申请实施例的关联图样周期的另一示例图。如图8所示，根据PRACH配置以及SSB和preamble等配置可知：一个association pattern period中时域上关联相同SSB的有4个valid ROs。且该PRACH configuration用于repetition number为2和4的multiple PRACH transmissions，则K值等于该PRACH configuration用于multiple PRACH transmissions的最大repetition number值，即K＝4。则4个association pattern periods能够确定为关联SSB与RO groups的可重复的pattern。
如图8所示，SSB个数为4。关联SSB 0的valid ROs可以组成关联SSB 0的RO groups。对于repetition number为4的multiple PRACH transmissions，图8中时域位置上相近的4个valid ROs组成一个RO group，如图8中方块801中的4个ROs所示。对于repetition number为2的multiple PRACH transmissions，图8中时域位置上相近的2个valid ROs组成一个RO group，如图8中方块802中的2个ROs所示。并且，repetition number为2的multiple PRACH transmissions与repetition number为4的multiple PRACH transmissions是在shared ROs上。
再例如，以K值等于所配置的多个number of multiple PRACH transmissions中的最大值为例，对于配置的多个number of multiple PRACH transmissions是在separate  ROs上。
图9是本申请实施例的关联图样周期的另一示例图。如图9所示，SSB index个数为4。根据repetition number为4和repetition number为2的separate PRACH configuration，得到在不同频域的相应的separate ROs。两个multiple PRACH transmissions的association pattern period中时域上关联相同SSB的有4个valid ROs。两个multiple PRACH transmissions的PRACH configuration分别用于repetition number为2和4的multiple PRACH transmissions，则K值等于其中最大的repetition number值，即K＝4。因此，4个association pattern periods能够确定为关联SSB与RO groups的可重复的pattern。
如图9所示，对于repetition number为4的multiple PRACH transmissions，关联SSB 0/1的valid ROs可以组成关联SSB 0/1的RO groups。图9中时域位置上相近的4个valid ROs组成一个RO group，如图9中方块901中的4个ROs所示。
如图9所示，对于repetition number为2的multiple PRACH transmissions，关联SSB 0/1的valid ROs可以组成关联SSB 0/1的RO groups。图9中时域位置上相近的2个ROs组成一个RO group，如图9中方块902中的2个ROs所示。
以上示例性说明了通过其他参数获得K值的情况，以下再说明默认值或固定值的情况。
在一些实施例中，所述第一数量为默认值或固定值。
例如，K值为固定的一个默认值，例如K＝8，即multiple PRACH transmissions可以取得最大的repetition number值。
再例如，K值为候选集合中的一个值。例如对于不同association pattern period值，K的取值为集合中候选值的一个，且K值为对于每个SSB index至少关联一个RO group的最少的association pattern periods的值。
以候选值集合为例，例如对于第一association pattern period，K的候选值集合为第一集合。对于第二association pattern period，K的候选值集合为第二集合。例如，association pattern period值对与应的K值如下表2所示。
表2.Association pattern period与K值之间的对应关系
以最小的association pattern period值为例，K值为可以保证所有SSB都关联到RO group的最小值。
图10是本申请实施例的关联图样周期的另一示例图。如图10所示，SSB index个数为4。根据PRACH配置以及SSB和preamble等配置可知：一个PRACH configuration period为10ms，一个association pattern period中有8个PRACH configuration period，因此为80ms，且一个association pattern period中时域上关联相同SSB的有2个valid ROs，其中标记为灰色的ROs为无效ROs或未使用ROs。该PRACH configuration用于repetition number为4的multiple PRACH transmissions。
根据上表2可知，对于association pattern period为80ms，K值的候选值集合为{1,2,4,8}。对于repetition number为4的multiple PRACH transmissions，时域上关联相同SSB的4个RO组成一个RO group，如图10所示，至少2个association pattern period能够保证所有SSB关联一个RO group，则K值为2。
又例如，K是使time period X中时域上的ROs数量至少能组成一个RO group的最小值，或者K是使time period X中时域上关联相同SSB index的ROs数量大于或者等于the number of multiple PRACH transmission的最小值。
图11是本申请实施例的关联图样周期的另一示例图。如图11所示，SSB index个数为8，根据PRACH配置以及SSB和preamble等配置可知：一个PRACH configuration period为10ms，一个PRACH configuration period中可以映射4个SSB。一个association pattern period分别由2,4,2个association period组成，一个association pattern period为80ms。
若multiple PRACH transmission的repetition number为2，由图11可知，1个 association pattern period中的关联同一个SSB index的ROs数为3，大于multiple PRACH transmission的repetition number 2，所以最少1个association pattern period中的ROs可以组成RO group，则time period X为1个association pattern period，即K为1。
如图11所示，无效RO(invalid ROs)为与SSB burst或者UL/DL TDD configuration冲突的ROs，图11中使用灰色块表示无效RO。未使用RO(unused ROs)是无法映射8个SSB indexes的RO集合，即无法形成一个SSB-to-RO mapping cycle，图11中使用网格块表示未使用RO。
以下再对本申请实施例PRACH资源配置进行说明，K值可以由这些配置获得，进而可以确定出时间周期X。
在一些实施例中，对于上行公共配置中特征或特征合并具有PRACH发送的所有PRACH配置，所述所有PRACH配置的时间周期对应所述第一数量；或者，
对于上行公共配置中特征或特征合并具有PRACH发送的一个PRACH配置，且所有所述特征合并对应多个不同重复数目的PRACH发送，所述所有特征合并对应的PRACH发送的时间周期对应所述第一数量；或者，
对于上行公共配置中特征或特征合并具有PRACH发送的一个PRACH配置，且一个所述特征合并对应多个不同重复数目的PRACH发送，所述一个特征合并对应的PRACH发送的时间周期对应所述第一数量；或者，
对于上行公共配置中特征或特征合并具有PRACH发送的一个PRACH配置，且一个所述特征对应不同重复数目的PRACH发送，所述一个特征对应的PRACH发送的时间周期对应所述第一数量。
图12是本申请实施例的PRACH配置的一示例图。如图12所示，PRACH配置可以包括BWP-UplinkCommon、AdditionalRACH-Config、rach-ConfigCommon、featureCombinationPreambles等，关于这些配置的具体含义可以参考相关技术。
例如，对于BWP-UplinkCommon中所有的AdditionalRACH-Config，可以确定一个K值或多个K值，即一个time period X或多个time period X。BWP-UplinkCommon中不同的AdditionalRACH-Config的rach-ConfigCommon适用的multiple PRACH transmission，repetition number可能是不同的。
再例如，对于BWP-UplinkCommon中的一个AdditionalRACH-Config，该 AdditionalRACH-Config中rach-ConfigCommon中所有的featureCombinationPreambles可以确定一个K值或多个K值，即一个time period X或多个time period X。其中rach-ConfigCommon中不同的featureCombinationPreambles的feature或feature combinations适用的multiple PRACH transmissions，repetition number可能是不同的。
再例如，对于BWP-UplinkCommon中的一个AdditionalRACH-Config，该AdditionalRACH-Config中rach-ConfigCommon中的一个featureCombinationPreambles可以确定一个K值或多个K值，即一个time period X或多个time period X。一个featureCombinationPreambles的feature combination为具有不同repetition number的multiple PRACH transmission。
以上示例性说明了获得K值的例子，本申请不限于此，例如可以结合各种方式。
在一些实施例中，所述第一数量根据第一信息和/或第二信息而获得，或者，所述第一数量根据第一信息和默认值或固定值而获得，或者，所述第一数量根据第二信息和默认值或固定值而获得；所述第一信息用于配置和/或指示所述第一数量，所述第二信息用于配置和/或指示所述PRACH发送的重复数目和/或同步信号块(SSB)索引数目。
例如，可以将网络设备直接配置K值与默认K值的结合起来。例如，对于multiple PRACH transmission，time period X中有K个association pattern period；
当UE被配置K值时：time period X根据配置的K值确定，并且SSB和RO groups之间关联的pattern持续时间为K个association pattern periods；
当UE没有被配置K值时：time period X根据默认的K值确定，并且SSB和RO groups之间关联的pattern持续时间为K个association pattern periods，或者，K值为候选值集合中对于每个SSB index至少关联一个RO group的最小值。
再例如，可以将网络设备直接配置K值与其他参数获得K值的结合起来。例如，对于multiple PRACH transmission，time period X中有K个association pattern period；
当UE被配置K值时：time period X根据配置的K值确定，并且SSB和RO groups之间关联的pattern持续时间为K个association pattern periods；
当UE没有被配置K值时：
Multiple PRACH transmissions采用separate configuration of PRACH occasions，或者，对于随机接入过程的feature指示为repetition number为N的multiple PRACH  transmissions，K值为该multiple PRACH transmissions的repetition number，或者，
Multiple PRACH transmissions采用separate configuration of PRACH occasions，或者，具有不同repetition number的multiple PRACH transmissions采用common configuration of PRACH occasions，或者，对于随机接入过程的feature指示为multiple PRACH transmissions，K值为multiple PRACH transmissions配置的repetition number的最大值。
再例如，可以与指示number of multiple PRACH transmission的参数联合指示，K值为number of multiple PRACH transmissions的倍数。表3示出了与其他参数的信令联合指示的例子。
表3
以下再示意性说明K值相关限制的内容。
在一些实施例中，所述第一数量的关联图样周期为能够确定重复PRACH机会组图样(RO group pattern)的最小持续时间；对于所述关联图样周期中无法或无需组成所述PRACH机会组的PRACH机会(RO)，不在所述PRACH机会(RO)上映射SSB索引或者不在所述PRACH机会(RO)上进行PRACH发送。
在一些实施例中，不在所述PRACH机会(RO)上进行的PRACH发送至少包括多PRACH发送(multiple PRACH transmission)。例如，所述ROs至少不用于multiple PRACH transmissions，可以用于single PRACH transmissions。
图13是本申请实施例的关联图样周期的另一示例图，以网络设备直接配置K值 为例。如图13所示，SSB index个数为2。根据PRACH配置以及SSB和preamble等配置可知：一个association pattern period中时域上关联相同SSB的有6个valid ROs。且该PRACH configuration用于repetition number为4的multiple PRACH transmissions，则1个association pattern period内可以确定关联同一个SSB的1个RO group。
如图13所示，关联SSB 0的前4个valid ROs可以组成1个RO groups。且该association pattern period中标记为灰色且关联SSB 0的2个RO不能再组成一个multiple PRACH transmissions为4的RO group，所以，这2个RO不再关联SSB或者不再用于PRACH transmissions。如图13所示，1个association pattern period能够确定为关联SSB与RO的可重复的pattern。例如K值的候选值为{1,2,3,4}，gNB会配置候选值集合中的值，即K为1。
图14是本申请实施例的关联图样周期的另一示例图，以网络设备直接配置K值为例。如图14所示，SSB index个数为2。根据PRACH配置以及SSB和preamble等配置可知：一个association pattern period中时域上关联相同SSB的有6个valid ROs。且该PRACH configuration用于repetition number为8的multiple PRACH transmissions，则2个association pattern period内可以确定关联同一个SSB的1个RO group。
如图14所示，关联SSB 0的前6个valid ROs可以组成1个RO groups。且该association pattern period中标记为灰色且关联SSB 0的4个RO不能再组成一个multiple PRACH transmissions为8的RO group，所以这4个RO不再关联SSB或者不再用于PRACH transmissions。如图14所示，1个association pattern period能够确定为关联SSB与RO的可重复的pattern。例如K值的候选值为{1,2,3,4}，gNB会配置候选值集合中的值，即K为2。
在一些实施例中，所述第一数量的关联图样周期为能够确定重复PRACH机会组图样(RO group pattern)的最小持续时间；所述第一数量的关联图样周期中所有有效PRACH机会(RO)被用于所述PRACH发送。
例如，所述PRACH发送为多PRACH发送(multiple PRACH transmission)，即该PRACH发送中相同的前导被重复发送，本申请不限于此，该PRACH发送还可以使用其他名称。
图15是本申请实施例的关联图样周期的另一示例图，以网络设备直接配置K值为例。如图15所示，SSB index个数为2。根据PRACH配置以及SSB和preamble 等配置可知：一个association pattern period中时域上关联相同SSB的有6个valid ROs。且该PRACH configuration用于repetition number为4的multiple PRACH transmissions，则1个association pattern period内可以确定关联同一个SSB的1个RO group。
如图15所示，关联SSB 0的前4个valid ROs可以组成1个RO groups(RO组1)。该association pattern period中关联SSB 0的后2个ROs可以与下一个association pattern period中关联SSB 0的前2个ROs组成一个RO group(RO组2)，且第二个association pattern period中关联SSB 0的剩余4个ROs恰好能组成一个RO group(RO组3)。如图15所示，2个association pattern period能够确定为关联SSB与RO的可重复的pattern。例如K值的候选值为{1,2,3,4}，gNB会配置候选值集合中的值，即K为2。
在一些实施例中，在所述时间周期内，对于整数个PRACH机会组(RO group)之后无法组成一个映射第三数量的SSB索引的RO group的PRACH机会(RO)，不在所述PRACH机会(RO)上映射SSB索引或者不在所述PRACH机会(RO)上进行PRACH发送。
例如，N个RO可以形成一个完整的RO group，该时间周期内的多个RO在形成整数个RO group之后，可能还剩余一个或多个RO，如果这些RO无法组成一个映射所有SSB索引的RO group，则不在这些RO上映射SSB索引或者不在这些RO上进行PRACH发送。
在一些实施例中，不在所述PRACH机会(RO)上进行的PRACH发送为多PRACH发送(multiple PRACH transmission)。例如，所述ROs至少不用于multiple PRACH transmissions，可以用于single PRACH transmissions。
图16是本申请实施例的关联图样周期的另一示例图，如图16所示，SSB index个数(第三数量)为8，根据PRACH配置以及SSB和preamble等配置可知：一个PRACH configuration period为10ms，一个PRACH configuration period可以映射4个SSB。一个association pattern period分别由2,4,2个association period组成，一个association pattern period为80ms。
若multiple PRACH transmission的repetition number为2，由图16可知，1个association pattern period中的关联同一个SSB index的ROs数为3，大于multiple PRACH transmission的repetition number 2，所以最少1个association pattern period中 的ROs可以组成RO group，则time period X为1个association pattern period，即K为1。
如图16所示，每个association pattern period中最后一个association period中的ROs无法组成一个RO group，则不再用于multiple PRACH transmission，图16使用斜线块表示不用于multip PRACH transmission的RO。无效RO(invalid ROs)为与SSB burst或者UL/DL TDD configuration冲突的ROs，图16中使用灰色块表示无效RO。未使用RO(unused ROs)是无法映射8个SSB indexes的RO集合，即无法形成一个SSB-to-RO mapping cycle，图16中使用网格块表示未使用RO。
图17是本申请实施例的关联图样周期的另一示例图，如图17所示，SSB index个数为8，若multiple PRACH transmission的repetition number为4，由图17可知，1个association pattern period中的关联同一个SSB index的ROs数为3，最少2个association pattern period中的ROs可以组成RO group，则time period X为2个association pattern period，即K为2。
如图17所示，每个time period X中最后一个association pattern period中的后两个association period中的ROs无法组成一个RO group，则不再用于multiple PRACH transmission，图17使用斜线块表示不用于multip PRACH transmission的RO。无效RO(invalid ROs)为与SSB burst或者UL/DL TDD configuration冲突的ROs，图17中使用灰色块表示无效RO。未使用RO(unused ROs)是无法映射8个SSB indexes的RO集合，即无法形成一个SSB-to-RO mapping cycle，图17中使用网格块表示未使用RO。
在一些实施例中，所述第一数量的最大值为Kmax；所述时间周期的最大值为Tmax，时间周期的单位例如为毫秒(ms)。
例如，Kmax为默认的固定值，或者由基站指示。例如K为所配置的numbers of multiple PRACH transmissions中的最大值，该最大值不会超过Kmax。
在本申请实施例中，终端设备能够快速获得发送multiple PRACH transmissions的RO资源，并且保证multiple PRACH transmissions的发送，从而提高了系统的覆盖能力。
此外，对于不同的multiple PRACH transmissions配置可以采用不同的SSB与RO group映射样式重复周期。对于需要减小传输时延的场景，能够使所有SSB映射到 RO group的重复周期最小，进而减小了multiple PRACH transmissions的发送间隔时间和/或持续时间以及基站检测PRACH的时间，从而降低了multiple PRACH transmissions的传输时延。
此外，对于资源有限的场景，能够尽可能的利用传输multiple PRACH transmissions的RO资源，从而提高了PRACH transmission的资源利用率。
以上各个实施例仅对本申请实施例进行了示例性说明，但本申请不限于此，还可以在以上各个实施例的基础上进行适当的变型。例如，可以单独使用上述各个实施例，也可以将以上各个实施例中的一种或多种结合起来。
由上述实施例可知，终端设备确定第二数量的与时间周期相关的RO，所述时间周期为第一数量的SSB与RO的关联图样周期。由此，终端设备能够快速获得多PRACH发送的RO资源，并且保证多PRACH发送中所有SSB均被映射到RO，从而提高了系统的覆盖能力。
第二方面的实施例
本申请实施例提供一种PRACH接收方法，从网络设备侧进行说明。第二方面的实施例可以与第一方面的实施例结合起来，与第一方面的实施例相同的内容不再赘述。
图18是本申请实施例的PRACH接收方法的一示意图，如图18所示，该方法包括：
1802，网络设备接收终端设备在第二数量的RO上重复发送的前导(preamble)；
其中，终端设备确定所述第二数量的与时间周期相关的RO，所述时间周期为第一数量的同步信号块(SSB)与PRACH机会(RO)的关联图样周期(SSB-to-RO association pattern period)。
在一些实施例中，如图18所示，该方法还可以包括：
1801，网络设备向终端设备发送PRACH配置信息和/或指示信息。
值得注意的是，以上附图18仅对本申请实施例进行了示意性说明，但本申请不限于此。例如可以适当地调整各个操作之间的执行顺序，此外还可以增加其他的一些操作或者减少其中的某些操作。本领域的技术人员可以根据上述内容进行适当地变型，而不仅限于上述附图18的记载。
在一些实施例中，所述时间周期基于由分开(separate)的PRACH机会配置和/ 或公共(common)的PRACH机会配置(configuration of PRACH occasion)所配置的有效PRACH机会(valid RO)被确定。
在一些实施例中，所述第二数量N为所述PRACH发送的重复数目(repetition number)，N为大于1的正整数。
在一些实施例中，具有不同重复数目的PRACH发送的特征(feature)或特征合并(combination of features)对应分开(separate)的PRACH机会配置，或者，具有不同重复数目的PRACH发送的特征(feature)或特征合并(combination of features)对应公共(common)的PRACH机会配置。
在一些实施例中，所述第一数量K由来自网络设备的第一信息配置和/或指示，所述第一信息包括无线资源控制(RRC)信令和/或MAC CE和/或下行控制信息，K为正整数。
在一些实施例中，由所述网络设备配置和/或指示的第一数量为候选值集合中的一个值。
在一些实施例中，第一关联图样周期对应第一候选值集合，第二关联图样周期对应第二候选值集合；所述第一关联图样周期不同于所述第二关联图样周期。
在一些实施例中，所述第一数量至少根据第二信息而获得，所述第二信息用于配置和/或指示所述PRACH发送的重复数目和/或同步信号块(SSB)索引数目。
在一些实施例中，针对所述PRACH发送配置一个重复数目；或者，针对所述PRACH发送配置多个重复数目，其中所述多个重复数目中的一个重复数目对应一个第一数量。
在一些实施例中，所述第一数量等于配置的重复数目，或者，所述第一数量为配置的重复数目的整数倍，或者，所述第一数量为所述SSB索引数目和配置的重复数目的最小公倍数。
在一些实施例中，针对所述PRACH发送配置多个重复数目，其中所述多个重复数目对应一个第一数量。
在一些实施例中，所述第一数量等于配置的所述多个重复数目中的最大值，或者，所述第一数量为配置的所述多个重复数目的最大值的整数倍，或者，所述第一数量为配置的所述多个重复数目的最小公倍数，或者，所述第一数量为配置的所述多个重复数目的数量，或者，所述第一数量为所述SSB索引数目和配置的所述多个重复数目 的最小公倍数。
在一些实施例中，所述第一数量为默认值或固定值。
在一些实施例中，所述第一数量是使所述时间周期中时域上的RO数量至少能组成一个RO组的最小值，或者，所述第一数量是使所述时间周期中时域上关联相同SSB索引的RO数量大于或者等于所述PRACH发送的重复数目的最小值。
在一些实施例中，所述第一数量根据第一信息和/或第二信息而获得，或者，所述第一数量根据第一信息和默认值或固定值而获得，或者，所述第一数量根据第二信息和默认值或固定值而获得；
所述第一信息用于配置和/或指示所述第一数量，所述第二信息用于配置和/或指示所述PRACH发送的重复数目和/或同步信号块(SSB)索引数目。
在一些实施例中，所述第一数量的关联图样周期为能够确定重复PRACH机会组图样(RO group pattern)的最小持续时间；
对于所述关联图样周期中无法或无需组成所述PRACH机会组的PRACH机会(RO)，不在所述PRACH机会(RO)上映射SSB索引或者不在所述PRACH机会(RO)上进行PRACH发送。
在一些实施例中，所述第一数量的关联图样周期为能够确定重复PRACH机会组图样(RO group pattern)的最小持续时间；
所述第一数量的关联图样周期中所有有效PRACH机会(RO)被用于所述PRACH发送。
在一些实施例中，在所述时间周期内，对于整数个PRACH机会组(RO group)之外无法组成一个映射第三数量的SSB索引的RO group的PRACH机会(RO)，不在所述PRACH机会(RO)上映射SSB索引或者不在所述PRACH机会(RO)上进行PRACH发送。
在一些实施例中，不在所述PRACH机会(RO)上进行的PRACH发送为多PRACH发送(multiple PRACH transmission)。
在一些实施例中，对于上行公共配置中特征或特征合并具有PRACH发送的所有PRACH配置，所述所有PRACH配置的时间周期对应于所述第一数量；或者，
对于上行公共配置中特征或特征合并具有PRACH发送的一个PRACH配置，且所有所述特征合并对应多个不同重复数目的PRACH发送，所述所有特征合并对应的 PRACH发送的时间周期对应于所述第一数量；或者，
对于上行公共配置中特征或特征合并具有PRACH发送的一个PRACH配置，且一个所述特征合并对应多个不同重复数目的PRACH发送，所述一个特征合并对应的PRACH发送的时间周期对应于所述第一数量；或者，
对于上行公共配置中特征或特征合并具有PRACH发送的一个PRACH配置，且一个所述特征对应不同重复数目的PRACH发送，所述一个特征对应的PRACH发送的时间周期对应于所述第一数量。
在一些实施例中，所述第一数量的最大值为Kmax；所述时间周期的最大值为Tmax，时间周期的单位例如为毫秒(ms)。
以上各个实施例仅对本申请实施例进行了示例性说明，但本申请不限于此，还可以在以上各个实施例的基础上进行适当的变型。例如，可以单独使用上述各个实施例，也可以将以上各个实施例中的一种或多种结合起来。
由上述实施例可知，终端设备确定第二数量的与时间周期相关的RO，所述时间周期为第一数量的SSB与RO的关联图样周期。由此，终端设备能够快速获得多PRACH发送的RO资源，并且保证多PRACH发送中所有SSB均被映射到RO，从而提高了系统的覆盖能力。
第三方面的实施例
本申请实施例提供一种PRACH发送装置。该装置例如可以是终端设备，也可以是配置于终端设备的某个或某些部件或者组件，与第一方面的实施例相同的内容不再赘述。
图19是本申请实施例的PRACH发送装置的一示意图。如图19所示，PRACH发送装置1900包括：
处理单元1901，其确定第二数量的与时间周期相关的RO，所述时间周期为第一数量的同步信号块(SSB)与PRACH机会(RO)的关联图样周期(SSB-to-RO association pattern period)；
发送单元1902，其在所述第二数量的RO上重复发送前导(preamble)。
在一些实施例中，所述时间周期基于由分开(separate)的PRACH机会配置和/或公共(common)的PRACH机会配置(configuration of PRACH occasion)所配置 的有效PRACH机会(valid RO)被确定。
在一些实施例中，所述第二数量N为所述PRACH发送的重复数目(repetition number)，N为大于1的正整数。
在一些实施例中，具有不同重复数目的PRACH发送的特征(feature)或特征合并(combination of features)对应分开(separate)的PRACH机会配置，或者，具有不同重复数目的PRACH发送的特征(feature)或特征合并(combination of features)对应公共(common)的PRACH机会配置。
在一些实施例中，所述第一数量K由来自网络设备的第一信息配置和/或指示，所述第一信息包括无线资源控制(RRC)信令和/或MAC CE和/或下行控制信息，K为正整数。
在一些实施例中，由所述网络设备配置和/或指示的第一数量为候选值集合中的一个值。
在一些实施例中，第一关联图样周期对应第一候选值集合，第二关联图样周期对应第二候选值集合；所述第一关联图样周期不同于所述第二关联图样周期。
在一些实施例中，所述第一数量至少根据第二信息而获得，所述第二信息用于配置和/或指示所述PRACH发送的重复数目和/或同步信号块(SSB)索引数目。
在一些实施例中，针对所述PRACH发送配置一个重复数目；或者，针对所述PRACH发送配置多个重复数目，其中所述多个重复数目中的一个重复数目对应一个第一数量。
在一些实施例中，所述第一数量等于配置的重复数目，或者，所述第一数量为配置的重复数目的整数倍，或者，所述第一数量为所述SSB索引数目和配置的重复数目的最小公倍数。
在一些实施例中，针对所述PRACH发送配置多个重复数目，其中所述多个重复数目对应一个第一数量。
在一些实施例中，所述第一数量等于配置的所述多个重复数目中的最大值，或者，所述第一数量为配置的所述多个重复数目的最大值的整数倍，或者，所述第一数量为配置的所述多个重复数目的最小公倍数，或者，所述第一数量为配置的所述多个重复数目的数量，或者，所述第一数量为所述SSB索引数目和配置的所述多个重复数目的最小公倍数。
在一些实施例中，所述第一数量为默认值或固定值。
在一些实施例中，所述第一数量是使所述时间周期中时域上的RO数量至少能组成一个RO组的最小值，或者，所述第一数量是使所述时间周期中时域上关联相同SSB索引的RO数量大于或者等于所述PRACH发送的重复数目的最小值。
在一些实施例中，所述第一数量根据第一信息和/或第二信息而获得，或者，所述第一数量根据第一信息和默认值或固定值而获得，或者，所述第一数量根据第二信息和默认值或固定值而获得；
所述第一信息用于配置和/或指示所述第一数量，所述第二信息用于配置和/或指示所述PRACH发送的重复数目和/或同步信号块(SSB)索引数目。
在一些实施例中，所述第一数量的关联图样周期为能够确定重复PRACH机会组图样(RO group pattern)的最小持续时间；
对于所述关联图样周期中无法或无需组成所述PRACH机会组的PRACH机会(RO)，不在所述PRACH机会(RO)上映射SSB索引或者不在所述PRACH机会(RO)上进行PRACH发送。
在一些实施例中，所述第一数量的关联图样周期为能够确定重复PRACH机会组图样(RO group pattern)的最小持续时间；
所述第一数量的关联图样周期中所有有效PRACH机会(RO)被用于所述PRACH发送。
在一些实施例中，在所述时间周期内，对于整数个PRACH机会组(RO group)之外无法组成一个映射第三数量的SSB索引的RO group的PRACH机会(RO)，不在所述PRACH机会(RO)上映射SSB索引或者不在所述PRACH机会(RO)上进行PRACH发送。
在一些实施例中，不在所述PRACH机会(RO)上进行的PRACH发送为多PRACH发送(multiple PRACH transmission)。
在一些实施例中，对于上行公共配置中特征或特征合并具有PRACH发送的所有PRACH配置，所述所有PRACH配置的时间周期对应于所述第一数量；或者，
对于上行公共配置中特征或特征合并具有PRACH发送的一个PRACH配置，且所有所述特征合并对应多个不同重复数目的PRACH发送，所述所有特征合并对应的PRACH发送的时间周期对应于所述第一数量；或者，
对于上行公共配置中特征或特征合并具有PRACH发送的一个PRACH配置，且一个所述特征合并对应多个不同重复数目的PRACH发送，所述一个特征合并对应的PRACH发送的时间周期对应于所述第一数量；或者，
对于上行公共配置中特征或特征合并具有PRACH发送的一个PRACH配置，且一个所述特征对应不同重复数目的PRACH发送，所述一个特征对应的PRACH发送的时间周期对应于所述第一数量。
在一些实施例中，所述第一数量的最大值为Kmax；所述时间周期的最大值为Tmax。
在一些实施例中，如图19所示，PRACH发送装置1900还可以包括：
接收单元1903，其接收网络设备发送的PRACH配置信息和/或指示信息。
值得注意的是，以上仅对与本申请相关的各部件或模块进行了说明，但本申请不限于此。PRACH发送装置1900还可以包括其他部件或者模块，关于这些部件或者模块的具体内容，可以参考相关技术。
此外，为了简单起见，图19中仅示例性示出了各个部件或模块之间的连接关系或信号走向，但是本领域技术人员应该清楚的是，可以采用总线连接等各种相关技术。上述各个部件或模块可以通过例如处理器、存储器、发射机、接收机等硬件设施来实现；本申请实施并不对此进行限制。
通过本申请实施例，终端设备确定第二数量的与时间周期相关的RO，所述时间周期为第一数量的SSB与RO的关联图样周期。由此，终端设备能够快速获得多PRACH发送的RO资源，并且保证多PRACH发送中所有SSB均被映射到RO，从而提高了系统的覆盖能力。
第四方面的实施例
本申请实施例提供一种PRACH接收装置。该装置例如可以是网络设备，也可以是配置于网络设备的某个或某些部件或者组件，与第一、二方面的实施例相同的内容不再赘述。
图20是本申请实施例的PRACH接收装置的一示意图。如图20所示，PRACH接收装置2000包括：
接收单元2001，其接收终端设备在第二数量的RO上重复发送的前导(preamble)；
其中，所述终端设备确定所述第二数量的与时间周期相关的RO，所述时间周期为第一数量的同步信号块(SSB)与PRACH机会(RO)的关联图样周期(SSB-to-RO association pattern period)。
在一些实施例中，如图20所示，PRACH接收装置2000还可以包括：
发送单元2002，其向终端设备发送PRACH配置信息和/或指示信息。
值得注意的是，以上仅对与本申请相关的各部件或模块进行了说明，但本申请不限于此。PRACH接收装置2000还可以包括其他部件或者模块，关于这些部件或者模块的具体内容，可以参考相关技术。
此外，为了简单起见，图20中仅示例性示出了各个部件或模块之间的连接关系或信号走向，但是本领域技术人员应该清楚的是，可以采用总线连接等各种相关技术。上述各个部件或模块可以通过例如处理器、存储器、发射机、接收机等硬件设施来实现；本申请实施并不对此进行限制。
通过本申请实施例，终端设备确定第二数量的与时间周期相关的RO，所述时间周期为第一数量的SSB与RO的关联图样周期。由此，终端设备能够快速获得多PRACH发送的RO资源，并且保证多PRACH发送中所有SSB均被映射到RO，从而提高了系统的覆盖能力。
第五方面的实施例
本申请实施例还提供一种通信系统，可以参考图1，与第一至四方面的实施例相同的内容不再赘述。
在一些实施例中，通信系统100至少可以包括：
终端设备，其确定第二数量的与时间周期相关的RO，所述时间周期为第一数量的同步信号块(SSB)与PRACH机会(RO)的关联图样周期(SSB-to-RO association pattern period)；
网络设备，其接收所述终端设备在所述第二数量的RO上重复发送的前导。
本申请实施例还提供一种网络设备，例如可以是基站，但本申请不限于此，还可以是其他的网络设备。
图21是本申请实施例的网络设备的构成示意图。如图21所示，网络设备2100可以包括：处理器2110(例如中央处理器CPU)和存储器2120；存储器2120耦合 到处理器2110。其中该存储器2120可存储各种数据；此外还存储信息处理的程序2130，并且在处理器2110的控制下执行该程序2130。
例如，处理器2110可以被配置为执行程序而实现如第二方面的实施例所述的PRACH接收方法。例如处理器2110可以被配置为进行如下的控制：接收终端设备在第二数量的RO上重复发送的前导(preamble)；
其中，所述终端设备确定所述第二数量的与时间周期相关的RO，所述时间周期为第一数量的同步信号块(SSB)与PRACH机会(RO)的关联图样周期(SSB-to-RO association pattern period)。
此外，如图21所示，网络设备2100还可以包括：收发机2140和天线2150等；其中，上述部件的功能与现有技术类似，此处不再赘述。值得注意的是，网络设备2100也并不是必须要包括图21中所示的所有部件；此外，网络设备2100还可以包括图21中没有示出的部件，可以参考现有技术。
本申请实施例还提供一种终端设备，但本申请不限于此，还可以是其他的设备。
图22是本申请实施例的终端设备的示意图。如图22所示，该终端设备2200可以包括处理器2210和存储器2220；存储器2220存储有数据和程序，并耦合到处理器2210。值得注意的是，该图是示例性的；还可以使用其他类型的结构，来补充或代替该结构，以实现电信功能或其他功能。
例如，处理器2210可以被配置为执行程序而实现如第一方面的实施例所述的PRACH发送方法。例如处理器2210可以被配置为进行如下的控制：确定第二数量的与时间周期相关的RO，所述时间周期为第一数量的同步信号块(SSB)与PRACH机会(RO)的关联图样周期(SSB-to-RO association pattern period)；在所述第二数量的RO上重复发送前导(preamble)。
如图22所示，该终端设备2200还可以包括：通信模块2230、输入单元2240、显示器2250、电源2260。其中，上述部件的功能与现有技术类似，此处不再赘述。值得注意的是，终端设备2200也并不是必须要包括图22中所示的所有部件，上述部件并不是必需的；此外，终端设备2200还可以包括图22中没有示出的部件，可以参考现有技术。
本申请实施例还提供一种计算机程序，其中当在终端设备中执行所述程序时，所述程序使得所述终端设备执行第一方面的实施例所述的PRACH发送方法。
本申请实施例还提供一种存储有计算机程序的存储介质，其中所述计算机程序使得终端设备执行第一方面的实施例所述的PRACH发送方法。
本申请实施例还提供一种计算机程序，其中当在网络设备中执行所述程序时，所述程序使得所述网络设备执行第二方面的实施例所述的PRACH接收方法。
本申请实施例还提供一种存储有计算机程序的存储介质，其中所述计算机程序使得网络设备执行第二方面的实施例所述的PRACH接收方法。
本申请以上的装置和方法可以由硬件实现，也可以由硬件结合软件实现。本申请涉及这样的计算机可读程序，当该程序被逻辑部件所执行时，能够使该逻辑部件实现上文所述的装置或构成部件，或使该逻辑部件实现上文所述的各种方法或步骤。本申请还涉及用于存储以上程序的存储介质，如硬盘、磁盘、光盘、DVD、flash存储器等。
结合本申请实施例描述的方法/装置可直接体现为硬件、由处理器执行的软件模块或二者组合。例如，图中所示的功能框图中的一个或多个和/或功能框图的一个或多个组合，既可以对应于计算机程序流程的各个软件模块，亦可以对应于各个硬件模块。这些软件模块，可以分别对应于图中所示的各个步骤。这些硬件模块例如可利用现场可编程门阵列(FPGA)将这些软件模块固化而实现。
软件模块可以位于RAM存储器、闪存、ROM存储器、EPROM存储器、EEPROM存储器、寄存器、硬盘、移动磁盘、CD-ROM或者本领域已知的任何其它形式的存储介质。可以将一种存储介质耦接至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息；或者该存储介质可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。该软件模块可以存储在移动终端的存储器中，也可以存储在可插入移动终端的存储卡中。例如，若设备(如移动终端)采用的是较大容量的MEGA-SIM卡或者大容量的闪存装置，则该软件模块可存储在该MEGA-SIM卡或者大容量的闪存装置中。
针对附图中描述的功能方框中的一个或多个和/或功能方框的一个或多个组合，可以实现为用于执行本申请所描述功能的通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)或者其它可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件或者其任意适当组合。针对附图描述的功能方框中的一个或多个和/或功能方框的一个或多个组合，还可以实现为计算设备的组合，例如，DSP和微处理器的组合、多个微处理器、与DSP通信结合的一个或多个微处 理器或者任何其它这种配置。
以上结合具体的实施方式对本申请进行了描述，但本领域技术人员应该清楚，这些描述都是示例性的，并不是对本申请保护范围的限制。本领域技术人员可以根据本申请的精神和原理对本申请做出各种变型和修改，这些变型和修改也在本申请的范围内。
关于包括以上实施例的实施方式，还公开下述的附记：
1.一种PRACH发送方法，包括：
终端设备确定第二数量的与时间周期相关的RO，所述时间周期为第一数量的同步信号块(SSB)与PRACH机会(RO)的关联图样周期(SSB-to-RO association pattern period)；
所述终端设备在所述第二数量的RO上重复发送前导(preamble)。
2.根据附记1所述的方法，其中，所述时间周期基于由分开(separate)的PRACH机会配置和/或公共(common)的PRACH机会配置(configuration of PRACH occasion)所配置的有效PRACH机会(valid RO)被确定。
3.根据附记2所述的方法，其中，所述第二数量N为所述PRACH发送的重复数目(repetition number)，N为大于1的正整数；
具有不同重复数目的PRACH发送的特征(feature)或特征合并(combination of features)对应分开(separate)的PRACH机会配置，或者，具有不同重复数目的PRACH发送的特征(feature)或特征合并(combination of features)对应公共(common)的PRACH机会配置。
4.根据附记1至3任一项所述的方法，其中，所述第一数量K由来自网络设备的第一信息配置和/或指示，所述第一信息包括无线资源控制(RRC)信令和/或MACCE和/或下行控制信息，K为正整数。
5.根据附记4所述的方法，其中，由所述网络设备配置和/或指示的第一数量为候选值集合中的一个值。
6.根据附记5所述的方法，其中，第一关联图样周期对应第一候选值集合，第二关联图样周期对应第二候选值集合；所述第一关联图样周期不同于所述第二关联图样周期。
7.根据附记1至3任一项所述的方法，其中，所述第一数量至少根据第二信息 而获得，所述第二信息用于配置和/或指示所述PRACH发送的重复数目和/或同步信号块(SSB)索引数目。
8.根据附记7所述的方法，其中，针对所述PRACH发送配置一个重复数目；或者，针对所述PRACH发送配置多个重复数目，其中所述多个重复数目中的一个重复数目对应一个第一数量。
9.根据附记8所述的方法，其中，所述第一数量等于配置的重复数目，或者，所述第一数量为配置的重复数目的整数倍，或者，所述第一数量为所述SSB索引数目和配置的重复数目的最小公倍数。
10.根据附记7所述的方法，其中，针对所述PRACH发送配置多个重复数目，其中所述多个重复数目对应一个第一数量。
11.根据附记10所述的方法，其中，所述第一数量等于配置的所述多个重复数目中的最大值，或者，所述第一数量为配置的所述多个重复数目的最大值的整数倍，或者，所述第一数量为配置的所述多个重复数目的最小公倍数，或者，所述第一数量为配置的所述多个重复数目的数量，或者，所述第一数量为所述SSB索引数目和配置的所述多个重复数目的最小公倍数。
12.根据附记1至3任一项所述的方法，其中，所述第一数量为默认值或固定值。
13.根据附记1至3任一项所述的方法，其中，所述第一数量是使所述时间周期中时域上的RO数量至少能组成一个RO组的最小值，或者，所述第一数量是使所述时间周期中时域上关联相同SSB索引的RO数量大于或者等于所述PRACH发送的重复数目的最小值。
14.根据附记1至3任一项所述的方法，其中，所述第一数量根据第一信息和/或第二信息而获得，或者，所述第一数量根据第一信息和默认值或固定值而获得，或者，所述第一数量根据第二信息和默认值或固定值而获得；
所述第一信息用于配置和/或指示所述第一数量，所述第二信息用于配置和/或指示所述PRACH发送的重复数目和/或同步信号块(SSB)索引数目。
15.根据附记1至14任一项所述的方法，其中，所述第一数量的关联图样周期为能够确定重复PRACH机会组图样(RO group pattern)的最小持续时间；
对于所述关联图样周期中无法或无需组成所述PRACH机会组的PRACH机会(RO)，不在所述PRACH机会(RO)上映射SSB索引或者不在所述PRACH机会 (RO)上进行PRACH发送。
16.根据附记1至14任一项所述的方法，其中，所述第一数量的关联图样周期为能够确定重复PRACH机会组图样(RO group pattern)的最小持续时间；
所述第一数量的关联图样周期中所有有效PRACH机会(RO)被用于所述PRACH发送。
17.根据附记1至16任一项所述的方法，其中，在所述时间周期内，对于整数个PRACH机会组(RO group)之外无法组成一个映射第三数量的SSB索引的RO group的PRACH机会(RO)，不在所述PRACH机会(RO)上映射SSB索引或者不在所述PRACH机会(RO)上进行PRACH发送。
18.根据附记17所述的方法，其中，不在所述PRACH机会(RO)上进行的PRACH发送为多PRACH发送(multiple PRACH transmission)。
19.根据附记1至18任一项所述的方法，其中，
对于上行公共配置中特征或特征合并具有PRACH发送的所有PRACH配置，所述所有PRACH配置的时间周期对应于所述第一数量；或者，
对于上行公共配置中特征或特征合并具有PRACH发送的一个PRACH配置，且所有所述特征合并对应多个不同重复数目的PRACH发送，所述所有特征合并对应的PRACH发送的时间周期对应于所述第一数量；或者，
对于上行公共配置中特征或特征合并具有PRACH发送的一个PRACH配置，且一个所述特征合并对应多个不同重复数目的PRACH发送，所述一个特征合并对应的PRACH发送的时间周期对应于所述第一数量；或者，
对于上行公共配置中特征或特征合并具有PRACH发送的一个PRACH配置，且一个所述特征对应不同重复数目的PRACH发送，所述一个特征对应的PRACH发送的时间周期对应于所述第一数量。
20.根据附记1至19任一项所述的方法，其中，所述第一数量的最大值为Kmax；所述时间周期的最大值为Tmax。
21.一种PRACH接收方法，包括：
网络设备接收终端设备在第二数量的RO上重复发送的前导(preamble)；
其中，终端设备确定所述第二数量的与时间周期相关的RO，所述时间周期为第一数量的同步信号块(SSB)与PRACH机会(RO)的关联图样周期(SSB-to-RO  association pattern period)。
22.根据附记21所述的方法，其中，所述时间周期基于由分开(separate)的PRACH机会配置和/或公共(common)的PRACH机会配置(configuration of PRACH occasion)所配置的有效PRACH机会(valid RO)被确定。
23.根据附记22所述的方法，其中，所述第二数量N为所述PRACH发送的重复数目(repetition number)，N为大于1的正整数；
具有不同重复数目的PRACH发送的特征(feature)或特征合并(combination of features)对应分开(separate)的PRACH机会配置，或者，具有不同重复数目的PRACH发送的特征(feature)或特征合并(combination of features)对应公共(common)的PRACH机会配置。
24.根据附记21至23任一项所述的方法，其中，所述第一数量K由来自网络设备的第一信息配置和/或指示，所述第一信息包括无线资源控制(RRC)信令和/或MAC CE和/或下行控制信息，K为正整数。
25.根据附记24所述的方法，其中，由所述网络设备配置和/或指示的第一数量为候选值集合中的一个值。
26.根据附记25所述的方法，其中，第一关联图样周期对应第一候选值集合，第二关联图样周期对应第二候选值集合；所述第一关联图样周期不同于所述第二关联图样周期。
27.根据附记21至23任一项所述的方法，其中，所述第一数量至少根据第二信息而获得，所述第二信息用于配置和/或指示所述PRACH发送的重复数目和/或同步信号块(SSB)索引数目。
28.根据附记27所述的方法，其中，针对所述PRACH发送配置一个重复数目；或者，针对所述PRACH发送配置多个重复数目，其中所述多个重复数目中的一个重复数目对应一个第一数量。
29.根据附记28所述的方法，其中，所述第一数量等于配置的重复数目，或者，所述第一数量为配置的重复数目的整数倍，或者，所述第一数量为所述SSB索引数目和配置的重复数目的最小公倍数。
30.根据附记27所述的方法，其中，针对所述PRACH发送配置多个重复数目，其中所述多个重复数目对应一个第一数量。
31.根据附记30所述的方法，其中，所述第一数量等于配置的所述多个重复数目中的最大值，或者，所述第一数量为配置的所述多个重复数目的最大值的整数倍，或者，所述第一数量为配置的所述多个重复数目的最小公倍数，或者，所述第一数量为配置的所述多个重复数目的数量，或者，所述第一数量为所述SSB索引数目和配置的所述多个重复数目的最小公倍数。
32.根据附记21至23任一项所述的方法，其中，所述第一数量为默认值或固定值。
33.根据附记21至23任一项所述的方法，其中，所述第一数量是使所述时间周期中时域上的RO数量至少能组成一个RO组的最小值，或者，所述第一数量是使所述时间周期中时域上关联相同SSB索引的RO数量大于或者等于所述PRACH发送的重复数目的最小值。
34.根据附记21至23任一项所述的方法，其中，所述第一数量根据第一信息和/或第二信息而获得，或者，所述第一数量根据第一信息和默认值或固定值而获得，或者，所述第一数量根据第二信息和默认值或固定值而获得；
所述第一信息用于配置和/或指示所述第一数量，所述第二信息用于配置和/或指示所述PRACH发送的重复数目和/或同步信号块(SSB)索引数目。
35.根据附记21至34任一项所述的方法，其中，所述第一数量的关联图样周期为能够确定重复PRACH机会组图样(RO group pattern)的最小持续时间；
对于所述关联图样周期中无法或无需组成所述PRACH机会组的PRACH机会(RO)，不在所述PRACH机会(RO)上映射SSB索引或者不在所述PRACH机会(RO)上进行PRACH发送。
36.根据附记21至34任一项所述的方法，其中，所述第一数量的关联图样周期为能够确定重复PRACH机会组图样(RO group pattern)的最小持续时间；
所述第一数量的关联图样周期中所有有效PRACH机会(RO)被用于所述PRACH发送。
37.根据附记21至36任一项所述的方法，其中，在所述时间周期内，对于整数个PRACH机会组(RO group)之外无法组成一个映射第三数量的SSB索引的RO group的PRACH机会(RO)，不在所述PRACH机会(RO)上映射SSB索引或者不在所述PRACH机会(RO)上进行PRACH发送。
38.根据附记37所述的方法，其中，不在所述PRACH机会(RO)上进行的PRACH发送为多PRACH发送(multiple PRACH transmission)。
39.根据附记21至38任一项所述的方法，其中，
对于上行公共配置中特征或特征合并具有PRACH发送的所有PRACH配置，所述所有PRACH配置的时间周期对应于所述第一数量；或者，
对于上行公共配置中特征或特征合并具有PRACH发送的一个PRACH配置，且所有所述特征合并对应多个不同重复数目的PRACH发送，所述所有特征合并对应的PRACH发送的时间周期对应于所述第一数量；或者，
对于上行公共配置中特征或特征合并具有PRACH发送的一个PRACH配置，且一个所述特征合并对应多个不同重复数目的PRACH发送，所述一个特征合并对应的PRACH发送的时间周期对应于所述第一数量；或者，
对于上行公共配置中特征或特征合并具有PRACH发送的一个PRACH配置，且一个所述特征对应不同重复数目的PRACH发送，所述一个特征对应的PRACH发送的时间周期对应于所述第一数量。
40.根据附记21至39任一项所述的方法，其中，所述第一数量的最大值为Kmax；所述时间周期的最大值为Tmax。
41.一种终端设备，包括存储器和处理器，所述存储器存储有计算机程序，所述处理器被配置为执行所述计算机程序而实现如附记1至20任一项所述的PRACH发送方法。
42.一种网络设备，包括存储器和处理器，所述存储器存储有计算机程序，所述处理器被配置为执行所述计算机程序而实现如附记21至40任一项所述的PRACH接收方法。

Claims (20)

  1. 一种PRACH发送装置，配置于终端设备，所述装置包括：
    处理单元，其确定第二数量的与时间周期相关的PRACH机会，所述时间周期为第一数量的同步信号块与PRACH机会的关联图样周期；
    发送单元，其在所述第二数量的PRACH机会上重复发送前导。
  2. 根据权利要求1所述的装置，其中，所述时间周期基于由分开的PRACH机会配置和/或公共的PRACH机会配置所配置的有效PRACH机会被确定。
  3. 根据权利要求2所述的装置，其中，所述第二数量N为所述PRACH发送的重复数目，N为大于1的整数；
    具有不同重复数目的PRACH发送的特征或特征合并对应分开的PRACH机会配置，或者，具有不同重复数目的PRACH发送的特征或特征合并对应公共的PRACH机会配置。
  4. 根据权利要求1所述的装置，其中，所述第一数量K由来自网络设备的第一信息配置和/或指示，所述第一信息包括无线资源控制信令和/或MAC CE和/或下行控制信息，K为正整数。
  5. 根据权利要求4所述的装置，其中，由所述网络设备配置和/或指示的第一数量为候选值集合中的一个值。
  6. 根据权利要求5所述的装置，其中，第一关联图样周期对应第一候选值集合，第二关联图样周期对应第二候选值集合；所述第一关联图样周期不同于所述第二关联图样周期。
  7. 根据权利要求1所述的装置，其中，所述第一数量至少根据第二信息而获得，所述第二信息用于配置和/或指示所述PRACH发送的重复数目和/或同步信号块索引数目。
  8. 根据权利要求7所述的装置，其中，针对所述PRACH发送配置一个重复数目；或者，针对所述PRACH发送配置多个重复数目，其中所述多个重复数目中的一个重复数目对应一个第一数量。
  9. 根据权利要求8所述的装置，其中，所述第一数量等于配置的重复数目，或者，所述第一数量为配置的重复数目的整数倍，或者，所述第一数量为所述同步信号块索引数目和配置的重复数目的最小公倍数。
  10. 根据权利要求7所述的装置，其中，针对所述PRACH发送配置多个重复数目，其中所述多个重复数目对应一个第一数量。
  11. 根据权利要求10所述的装置，其中，所述第一数量等于配置的所述多个重复数目中的最大值，或者，所述第一数量为配置的所述多个重复数目的最大值的整数倍，或者，所述第一数量为配置的所述多个重复数目的最小公倍数，或者，所述第一数量为配置的所述多个重复数目的数量，或者，所述第一数量为所述同步信号块索引数目和配置的所述多个重复数目的最小公倍数。
  12. 根据权利要求1所述的装置，其中，所述第一数量为默认值或固定值；
    或者，所述第一数量是使所述时间周期中时域上的PRACH机会数量至少能组成一个PRACH机会组的最小值，或者，所述第一数量是使所述时间周期中时域上关联相同同步信号块索引的PRACH机会数量大于或者等于所述PRACH发送的重复数目的最小值。
  13. 根据权利要求1所述的装置，其中，所述第一数量根据第一信息和/或第二信息而获得，或者，所述第一数量根据第一信息和默认值或固定值而获得，或者，所述第一数量根据第二信息和默认值或固定值而获得；
    所述第一信息用于配置和/或指示所述第一数量，所述第二信息用于配置和/或指示所述PRACH发送的重复数目和/或同步信号块索引数目。
  14. 根据权利要求1所述的装置，其中，所述第一数量的关联图样周期为能够确定重复PRACH机会组图样的最小持续时间；
    对于所述关联图样周期中无法或无需组成所述PRACH机会组的PRACH机会，不在所述PRACH机会上映射同步信号块索引或者不在所述PRACH机会上进行PRACH发送；
    其中，不在所述PRACH机会上进行的PRACH发送为多PRACH发送。
  15. 根据权利要求1所述的装置，其中，所述第一数量的关联图样周期为能够确定重复PRACH机会组图样的最小持续时间；
    所述第一数量的关联图样周期中所有有效PRACH机会被用于所述PRACH发送。
  16. 根据权利要求1所述的装置，其中，在所述时间周期内，对于整数个PRACH机会组之外无法组成一个映射第三数量的同步信号块索引的PRACH机会组的PRACH机会，不在所述PRACH机会上映射同步信号块索引或者不在所述PRACH 机会上进行PRACH发送。
  17. 根据权利要求1所述的装置，其中，
    对于上行公共配置中特征或特征合并具有PRACH发送的所有PRACH配置，所述所有PRACH配置的时间周期对应于所述第一数量；或者，
    对于上行公共配置中特征或特征合并具有PRACH发送的一个PRACH配置，且所有所述特征合并对应多个不同重复数目的PRACH发送，所述所有特征合并对应的PRACH发送的时间周期对应于所述第一数量；或者，
    对于上行公共配置中特征或特征合并具有PRACH发送的一个PRACH配置，且一个所述特征合并对应多个不同重复数目的PRACH发送，所述一个特征合并对应的PRACH发送的时间周期对应于所述第一数量；或者，
    对于上行公共配置中特征或特征合并具有PRACH发送的一个PRACH配置，且一个所述特征对应不同重复数目的PRACH发送，所述一个特征对应的PRACH发送的时间周期对应于所述第一数量。
  18. 根据权利要求1所述的装置，其中，所述第一数量的最大值为Kmax；所述时间周期的最大值为Tmax。
  19. 一种PRACH接收装置，配置于网络设备，所述装置包括：
    接收单元，其接收终端设备在第二数量的PRACH机会上重复发送的前导；
    其中，所述终端设备确定所述第二数量的与时间周期相关的PRACH机会，所述时间周期为第一数量的同步信号块与PRACH机会的关联图样周期。
  20. 一种通信系统，包括：
    终端设备，其确定第二数量的与时间周期相关的PRACH机会，所述时间周期为第一数量的同步信号块与PRACH机会的关联图样周期；
    网络设备，其接收所述终端设备在所述第二数量的PRACH机会上重复发送的前导。
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