WO2025035250A1 - 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
WO2025035250A1
WO2025035250A1 PCT/CN2023/112506 CN2023112506W WO2025035250A1 WO 2025035250 A1 WO2025035250 A1 WO 2025035250A1 CN 2023112506 W CN2023112506 W CN 2023112506W WO 2025035250 A1 WO2025035250 A1 WO 2025035250A1
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WO
WIPO (PCT)
Prior art keywords
prach
group
period
ssb
opportunity
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PCT/CN2023/112506
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English (en)
French (fr)
Inventor
田妍
蒋琴艳
张磊
卢艺文
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Fujitsu Ltd
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Fujitsu Ltd
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Priority to PCT/CN2023/112506 priority Critical patent/WO2025035250A1/zh
Publication of WO2025035250A1 publication Critical patent/WO2025035250A1/zh
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA

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
  • SSB synchronization signal block
  • the association period SSB-to-RO association period
  • SSB-to-RO association pattern period SSB-to-RO association pattern period
  • the RO resources of the PRACH are determined within the SSB-to-RO association pattern period and are repeated at a later time.
  • the SSB-to-RO association pattern period includes one or more SSB-to-RO association periods, wherein the SSB-to-RO association period is determined by mapping between the SSB and the RO, and the RO to which the SSB is not mapped in the SSB-to-RO association period cannot be used for PRACH transmission.
  • the preamble needs to be repeatedly sent on at least multiple ROs in the time domain.
  • the SSB-to-RO group mapping method is introduced. If the SSB-to-RO association pattern period determination method is used, since the SSB-to-RO mapping method is changed to the SSB-to-RO group mapping method, the RO that is not mapped with SSB in the association period cannot be used to determine the RO group, resulting in a waste of RO resources.
  • an embodiment of the present application provides a PRACH sending and receiving method and device.
  • a PRACH sending method including:
  • the terminal device determines a second number of PRACH opportunities (RO) associated with a time period; wherein the time period includes a first number of first periods, a PRACH opportunity group (RO group) in the first period maps at least a third number of synchronization signal block (SSB) indexes, and the PRACH opportunities (RO) or PRACH opportunity groups (RO group) in the first period form a repeated pattern;
  • RO PRACH opportunities
  • SSB synchronization signal block
  • 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 PRACH opportunities (RO) associated with a time period; wherein the time period includes a first number of first periods, a PRACH opportunity group (RO group) in the first period maps at least a third number of synchronization signal block (SSB) indexes, and the PRACH opportunities (RO) or PRACH opportunity groups (RO group) in the first period form a repeated pattern;
  • RO PRACH opportunities
  • SSB synchronization signal block
  • 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 the preamble repeatedly sent by the terminal device on the second number of ROs
  • the terminal device determines the second number of PRACH opportunities (RO) associated with the time period; wherein the time period includes a first number of first periods, a PRACH opportunity group (RO group) in the first period maps at least a third number of synchronization signal block (SSB) indexes, and the PRACH opportunities (RO) or PRACH opportunity groups (RO group) in the first period form a repeated pattern.
  • the time period includes a first number of first periods, a PRACH opportunity group (RO group) in the first period maps at least a third number of synchronization signal block (SSB) indexes, and the PRACH opportunities (RO) or PRACH opportunity groups (RO group) in the first period form a repeated pattern.
  • SSB synchronization signal block
  • a PRACH receiving device which is configured in a network device, and the device includes:
  • a receiving unit wherein a receiving terminal device repeatedly sends a preamble on a second number of ROs
  • the terminal device determines the second number of PRACH opportunities (RO) associated with the time period; wherein the time period includes a first number of first periods, a PRACH opportunity group (RO group) in the first period maps at least a third number of synchronization signal block (SSB) indexes, and the PRACH opportunities (RO) or PRACH opportunity groups (RO group) in the first period form a repeated pattern.
  • the time period includes a first number of first periods, a PRACH opportunity group (RO group) in the first period maps at least a third number of synchronization signal block (SSB) indexes, and the PRACH opportunities (RO) or PRACH opportunity groups (RO group) in the first period form a repeated pattern.
  • SSB synchronization signal block
  • a communication system including:
  • a terminal device which determines the second number of PRACH opportunities (RO) associated with the time period; wherein the time period includes a first number of first periods, a PRACH opportunity group (RO group) in the first period maps at least a third number of synchronization signal block (SSB) indexes, and the PRACH opportunities (RO) or PRACH opportunity groups (RO group) in the first period form a repeated pattern;
  • SSB synchronization signal block
  • a network device receives a preamble that is repeatedly sent by the terminal device on a second number of ROs.
  • the terminal device determines a second number of ROs related to a time period, the time period includes a first number of first periods, the PRACH opportunity group (RO group) in the first period maps at least a third number of synchronization signal block (SSB) indexes, and the PRACH opportunity (RO) or PRACH opportunity group (RO group) in the first period forms a repeated pattern.
  • 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, which not only improves the coverage capability of the system, but also improves the utilization rate of RO resources.
  • 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 a time period according to an embodiment of the present application.
  • FIG4 is another example diagram of a time period according to an embodiment of the present application.
  • FIG5 is another example diagram of a time period according to an embodiment of the present application.
  • FIG6 is another example diagram of a time period according to an embodiment of the present application.
  • FIG7 is another example diagram of a time period according to an embodiment of the present application.
  • FIG8 is another example diagram of a time period according to an embodiment of the present application.
  • FIG9 is another example diagram of a time period according to an embodiment of the present application.
  • FIG10 is another example diagram of a time period according to an embodiment of the present application.
  • FIG11 is another example diagram of a time period according to an embodiment of the present application.
  • FIG12 is another example diagram of a time period according to an embodiment of the present application.
  • FIG13 is another example diagram of a time period according to an embodiment of the present application.
  • FIG14 is another example diagram of a time period according to an embodiment of the present application.
  • FIG15 is another example diagram of a time period according to an embodiment of the present application.
  • FIG16 is another example diagram of a time period according to an embodiment of the present application.
  • FIG17 is another example diagram of a time period according to an embodiment of the present application.
  • FIG18 is another example diagram of a time period according to an embodiment of the present application.
  • FIG19 is another example diagram of a time period according to an embodiment of the present application.
  • FIG20 is another example diagram of a time period according to an embodiment of the present application.
  • FIG21 is another example diagram of a time period according to an embodiment of the present application.
  • FIG22 is another example diagram of a time period according to an embodiment of the present application.
  • FIG23 is another example diagram of a time period according to an embodiment of the present application.
  • FIG24 is another example diagram of a time period according to an embodiment of the present application.
  • FIG25 is another example diagram of a time period according to an embodiment of the present application.
  • FIG26 is another example diagram of a time period according to an embodiment of the present application.
  • FIG27 is another example diagram of a time period according to an embodiment of the present application.
  • FIG28 is another example diagram of a time period according to an embodiment of the present application.
  • FIG29 is another example diagram of a time period according to an embodiment of the present application.
  • FIG30 is another example diagram of a time period according to an embodiment of the present application.
  • FIG31 is another example diagram of a time period according to an embodiment of the present application.
  • FIG32 is an example diagram of SSB-to-RO group mapping according to an embodiment of the present application.
  • FIG33 is another example diagram of SSB-to-RO group mapping according to an embodiment of the present application.
  • FIG34 is another example diagram of a time period according to an embodiment of the present application.
  • FIG35 is another example diagram of a time period according to an embodiment of the present application.
  • FIG36 is another example diagram of a time period according to an embodiment of the present application.
  • FIG37 is another example diagram of a time period according to an embodiment of the present application.
  • FIG38 is another example diagram of a time period according to an embodiment of the present application.
  • FIG39 is an example diagram of a PRACH configuration according to an embodiment of the present application.
  • FIG40 is a schematic diagram of a PRACH receiving method according to an embodiment of the present application.
  • FIG41 is a schematic diagram of a PRACH transmitting apparatus according to an embodiment of the present application.
  • FIG42 is a schematic diagram of a PRACH receiving device according to an embodiment of the present application.
  • FIG43 is a schematic diagram of a network device according to an embodiment of the present application.
  • Figure 44 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
  • communication between devices in the communication system may be carried out according to communication protocols of any stage, such as 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.
  • 1G generation
  • 2G 2.5G
  • 2.75G 3G
  • 4G 4G
  • 4.5G and 5G 3G
  • NR New Radio
  • future 6G etc.
  • 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.
  • the terminal device may include, but is not limited to, the following devices: cellular phones, personal digital assistants (PDAs), wireless modems, wireless communication devices, handheld devices, machine-type communication devices, laptop computers, cordless phones, smart phones, smart watches, digital cameras, etc.
  • PDAs personal digital assistants
  • wireless modems wireless communication devices
  • handheld devices machine-type communication devices
  • machine-type communication devices laptop computers
  • cordless phones smart phones
  • smart watches digital cameras
  • 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 refers to one side of the network, which may be a base station, or may include one or more network devices as above.
  • user side or “terminal side” or “terminal device side” refers to one side of the user or terminal, which may be a UE, or may include one or more terminal devices as above.
  • device may refer to either a network device or a terminal device.
  • 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 resources can predetermine the time domain pattern of SSB-RO mapping for sending PRACH and repeat the pattern 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, for single PRACH transmission, the SSB-to-RO association period is defined to ensure 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 preamble needs to be sent repeatedly on at least multiple ROs in the time domain. If the SSB-to-RO association pattern period determination method is used, since the SSB-to-RO mapping method is changed to the SSB-to-RO group mapping method, the RO that is not mapped with SSB in the association period cannot be used to determine the RO group, resulting in a waste of RO resources.
  • 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:
  • the terminal device determines a second number of PRACH opportunities (RO) associated with the time period; wherein the time period includes a first number of first periods, a PRACH opportunity group (RO group) in the first period maps at least a third number of synchronization signal block (SSB) indexes, and the PRACH opportunities (RO) or PRACH opportunity groups (RO groups) in the first period form a repeated pattern;
  • RO PRACH opportunities
  • SSB synchronization signal block
  • the terminal device repeatedly sends a preamble on the second number of ROs.
  • FIG2 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 FIG2.
  • 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 MSG 1 transmissions, etc.
  • the repetition number may also be referred to as the number of multiple PRACH transmissions.
  • valid ROs may follow the definition of valid RO in the 38.213 protocol, for example, 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, etc.; the present application is not limited to this.
  • the time period X is, for example, in milliseconds (ms).
  • the first period is a PRACH opportunity group (RO group) association pattern period (GRAPP), and the time period includes a first number K of first periods, where the first number K is an integer greater than or equal to 1.
  • the first number may be a value configured and/or indicated by the network device, or the first number may be a default value or a fixed value, or the first number may be a value determined by the terminal device.
  • K can be directly configured and/or indicated by the network device through signaling, or it can be configured by the network device through other parameters, such as the number of SSB indexes in the cell, or it can be a default value or a fixed value, or it can be a value determined by the terminal device according to default rules.
  • the maximum value of the time period is T1, and/or the maximum value of the first period is T2.
  • the unit of the time period is, for example, milliseconds (ms), and the value of the first period is, for example, a multiple of a configuration period.
  • the second number N is the repetition number of PRACH transmission, and 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 can be called an RO group, that is, an RO group includes N ROs, where N is the repetition number of PRACH transmission.
  • a PRACH opportunity group maps at least a third number of synchronization signal block (SSB) indices.
  • the third number is a value configured and/or indicated by a network device, and the third number is greater than Or an integer equal to 1.
  • the third quantity is It can be obtained through ssb-PositionsInBurst in SIB1 or ServingCellConfigCommon. This application is not limited to this. It can also be obtained from other parameters. For specific content, please refer to related technologies.
  • the PRACH opportunity group (RO group) associated pattern period includes a second period of a fourth number L, and the fourth number L is an integer greater than or equal to 1; the fourth number is a value configured and/or indicated by the network device, or the fourth number is a default value or a fixed value, or the fourth number is a value determined by the terminal device.
  • L can be directly configured and/or indicated by the network device through signaling, or it can be configured by the network device through other parameters, such as the number of SSB indexes in the cell, or it can be a default value or a fixed value, or it can be a value determined by the terminal device according to default rules.
  • L is the minimum number of RO group association periods that can map all SSB indexes and form an SSB-to-RO group mapping pattern.
  • L is the minimum number of RO group association periods that can map all SSB indexes.
  • the PRACH opportunities (RO) or PRACH opportunity groups (RO groups) in the first cycle form a repeated pattern.
  • the time-frequency resource positions of the RO groups in any first cycle and another first cycle are the same, and such RO groups form a repeated pattern; the present application is not limited thereto.
  • the following is an example of a first period being a PRACH opportunity group (RO group) association pattern period (RGAPP) and a second period being a PRACH opportunity group (RO group) association period (RGAP), but the present application is not limited thereto.
  • RGAPP PRACH opportunity group association pattern period
  • RO group PRACH opportunity group association period
  • the PRACH opportunity group (RO group) association period is determined at least according to a PRACH configuration period.
  • At least one RO group can also be equivalent to "there are at least a second number of ROs constituting the RO group”.
  • the fourth number is the minimum number of PRACH opportunity group (RO group) association periods that map the third number of synchronization signal block (SSB) indices and form an SSB to PRACH opportunity group (RO group) mapping pattern.
  • RO group PRACH opportunity group
  • the PRACH opportunity There is at least one PRACH opportunity group (RO group) in the group (RO group) association period.
  • the RO group association period starts from system frame 0.
  • the RO group association period is determined according to the configuration period, and at least one RO group can be determined within one association period.
  • the number of PRACH configuration periods (configuration period) included in the PRACH opportunity group (RO group) association period is a value in a candidate value set, and the number is the minimum value in the candidate value set to ensure that at least one PRACH opportunity group (RO group) is determined in the PRACH opportunity group (RO group) association period.
  • the number of PRACH configuration periods (configuration period) included in the PRACH opportunity group (RO group) association period is a predefined value, or a value configured/indicated by a network device.
  • the RO group association period is determined according to the PRACH configuration period, including but not limited to the following methods:
  • the number of configuration periods included in the RO group association period is in the candidate value set, and it is guaranteed that at least one RO group can be determined within the RO group association period;
  • the number of configuration periods included in the RO group association period is a predefined value or is determined by a default rule, for example, the number of configuration periods included in the RO group association period is N (the value of number of multiple PRACH transmissions), or the number of configuration periods included in the RO group association period is the minimum value that allows the RO group association period to contain at least one RO group;
  • the number of configuration periods included in the RO group association period is the value configured by the gNB.
  • the SSB index is not mapped on the PRACH opportunity (RO) or PRACH transmission is not performed on the PRACH opportunity (RO).
  • the RO(s) in the set will not map the SSB index or will not send PRACH transmissions on the RO.
  • other ROs are, for example, ROs that cannot form an RO group with a repetition number of N.
  • N ROs can form an RO group, and multiple ROs within the time period can form an integer number of ROs. After the group, one or more ROs may remain. If these ROs cannot form an RO group, the SSB index is not mapped on these ROs or the PRACH is not sent on these ROs.
  • 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.
  • the following example illustrates how to determine the RO group association period.
  • Fig. 3 is an example diagram of the time period of the embodiment of the present application.
  • the PRACH configuration period is 10ms, there is one PRACH slot in each subframe, and there is one PRACH occasion in each PRACH slot, so there are 10 ROs in each system frame.
  • the ROs in the 160ms radio frames numbered 0 to 15 are shown in Figure 3.
  • the number of ROs in the PRACH configuration period containing SSB is 0. Since the SSB period is 40ms, there are SSB bursts in the radio frames numbered 0, 4, 8, and 12, so there are 0 ROs in these frames.
  • the value of RGAP can be ⁇ 1, 2, 4, 8, 16 ⁇ PRACH configuration periods, and the actual value of RGAP is the minimum value in the candidate value set that the ROs in RGAP can at least guarantee to form an RO group.
  • the RO(s) in the set will not map the SSB index or will not send PRACH transmissions on the RO. Therefore, after forming an RO group in each RGAP in Figure 4, the remaining 2 ROs cannot form an RO group, and will no longer map the SSB index or will not be used for PRACH transmissions. Therefore, the number of ROs that form an RO group in one RGAP is 8.
  • the number of configuration periods included in the RO group association period is a predefined value, such as 8 (the maximum configurable repetition number value).
  • Fig. 5 is another example diagram of the time period of an embodiment of the present application. As shown in Fig. 5, for example, if the PRACH configuration is used for multiple PRACH transmission with a repetition number of 8, the RGAP consists of 8 PRACH configuration periods.
  • the RO(s) in the set will not map the SSB index or will not send PRACH transmissions on the RO. Therefore, after forming an RO group in each RGAP in Figure 5, the remaining 4 ROs cannot form an RO group, and will no longer map the SSB index or will not be used for PRACH transmissions. Therefore, the number of ROs in an RO group in an RGAP is 56 (7*8), forming an integer number (7) of RO groups.
  • the number of configuration periods included in the RO group association period is the number configured by the gNB.
  • the number of configuration periods included in the RO group association period is directly configured by the gNB, or the gNB configures it from a set of candidate values.
  • FIG6 is another example diagram of the time period of an embodiment of the present application.
  • the PRACH configuration is used for multiple PRACH transmission with a repetition number of 4, and the gNB directly configures the number of PRACH configuration periods included in the RGAP to be 2.
  • the RO(s) in the set will not be mapped to the SSB index. Or do not send PRACH transmissions on the RO. Therefore, after the 8 ROs in RGAP 0, 2, 4, 6 in Figure 6 form 2 RO groups, the remaining 2 ROs can no longer form an RO group, so these 2 ROs are dropped.
  • the number of valid ROs in RGAP 1, 3, 5, 7 is 20, and these ROs can form RO groups, so no ROs are dropped.
  • the number of configuration periods included in the RO group association period can be obtained through other parameters configured by the gNB, for example, equal to the repetition number configured by the gNB.
  • the configured repetition number may be the repetition number of multiple PRACH transmissions configured in a certain PRACH configuration or feature combination, or it may be the maximum repetition number of multiple PRACH transmissions configured with different repetition numbers. For details, please refer to the following embodiments.
  • Fig. 7 is another example diagram of the time period of an embodiment of the present application. As shown in Fig. 7, for example, if the PRACH configuration is used for multiple PRACH transmission with a repetition number of 4, the RGAP consists of 4 PRACH configuration periods.
  • the RO(s) in the set will not map the SSB index or will not send PRACH transmissions on the RO. Therefore, after forming an RO group in each RGAP in FIG7 , the remaining 2 ROs cannot form an RO group, and will no longer map the SSB index or will not be used for PRACH transmissions. Therefore, the number of ROs in an RO group in an RGAP is 28 (7*4), forming an integer number (7) of RO groups.
  • a RO group association pattern period contains L RO group association periods, where L ⁇ 1 and is an integer.
  • the RO groups in the RO group association pattern period can map all SSB indexes at least once, and the ROs/RO groups in the RO group association pattern period can determine a repeatable SSB-to-RO group pattern.
  • the L value configured for the gNB can ensure that the RGAPP maps all SSB indexes at least once, and the ROs/RO groups within the RO group association pattern period can determine a repeatable SSB-to-RO group pattern.
  • FIG8 is another example diagram of the time period of the embodiment of the present application.
  • an RO group association pattern period requires at least 8 groups.
  • This PRACH configuration is used for multiple PRACH transmission with a repetition number of 8.
  • RGAPs 0 to 7 can map all 8 SSB indices, but cannot form a SSB-to-RO group mapping cycle pattern.
  • RGAPs 0 to 8 can form a repeatable pattern, so RGAPP contains 9 RGAPs.
  • the SSB index is not mapped on the PRACH opportunity (RO) or PRACH transmission is not performed on the PRACH opportunity (RO).
  • a fifth number of SSB indexes are mapped on the PRACH opportunities (RO), the fifth number is less than the third number, and the fifth number is an integer greater than or equal to 1.
  • the fifth number of SSB indexes are the first M SSB indexes among the third number of SSB indexes, or, are the last M SSB indexes among the third number of SSB indexes, or, are random M SSB indexes among the third number of SSB indexes, where M is an integer greater than or equal to 1.
  • Fig. 9 is another example diagram of the time period of the embodiment of the present application. As shown in Fig. 9, the RO group in RGAP 8 is used to map a certain SSB index (represented by SSB#N) in the SSB index.
  • SSB#N SSB index
  • FIG. 10 is another example diagram of the time period of an embodiment of the present application.
  • the PRACH configuration is used for multiple PRACH transmission with a repetition number of 8.
  • RGAP 0 can map all 7 SSB indexes, but does not map all SSBs and cannot form a SSB-to-RO group mapping cycle pattern.
  • RGAP 0 to 1 can form a repeatable pattern. Therefore, RGAPP contains 2 RGAPs.
  • FIG11 is another example diagram of the time period of an embodiment of the present application. As shown in FIG11, the remaining The RO group can be used to map one of the 6 SSB indexes in the SSB index.
  • FIG. 12 is another example diagram of the time cycle of an embodiment of the present application.
  • the PRACH configuration is used for multiple PRACH transmission with a repetition number of 4, RGAP 0 to 2 can map all 8 SSB indexes, and 3 RGAPs cannot form a SSB-to-RO group mapping cycle pattern.
  • RGAP 0 to 3 a total of 4 RGAPs, can form a repeatable pattern. Therefore, RGAPP contains 4 RGAPs.
  • Fig. 13 is another example diagram of the time period of the embodiment of the present application. As shown in Fig. 13, the remaining RO groups in RGAP 2-3 can be used to map 6 SSB indexes in the SSB index.
  • FIG14 is another example diagram of the time cycle of the embodiment of the present application.
  • the PRACH configuration is used for multiple PRACH transmission with a repetition number of 4
  • RGAP 0 can map 7 SSBs 0 to 6
  • the 4 ROs in RGAP 1 that map SSB 7 can completely map the SSB indexes
  • RGAP 0 to 1 can form a SSB-to-RO group mapping cycle pattern. Therefore, RGAPP contains 2 RGAPs.
  • Fig. 15 is another example diagram of the time period of the embodiment of the present application. As shown in Fig. 15, the remaining RO groups in RGAP 1 can be used to map 6 SSB indexes in the SSB index.
  • the first period is determined at least based on a multiple of the least common multiple of a PRACH configuration period and an SSB burst period, and the multiple is an integer greater than or equal to 1.
  • the PRACH configuration period is P1
  • the SSB burst period is P2
  • P is the least common multiple of P1 and P2.
  • RGAPP L*P.
  • L is directly configured by the gNB, or the minimum value in the candidate value set configured by the gNB; for another example, L is the minimum value among the candidate values; for another example, L is the minimum value that can form the SSB-to-RO group mapping pattern.
  • the method of determining the RO group association pattern period is exemplified below. That is, the PRACH configuration is used for multiple PRACH transmission with a repetition number of 8, and the SSB burst period is 40 ms, the PRACH configuration period is 10 ms, and the valid ROs pattern after determining the RO group association period is shown in FIG4 .
  • a "RO group association pattern period” contains L “RO group association period (RGAP)", where L ⁇ 1 and is an integer.
  • RGAPP is a multiple of the least common multiple of all SSB indices mapped at least once and the PRACH configuration period and the SSB burst period.
  • the ROs/RO groups within the RO group association pattern period can determine a repeatable SSB-to-RO group pattern.
  • FIG16 is another example diagram of the time period of an embodiment of the present application.
  • L is a value directly configured by the gNB, or a value in a set of candidate values configured by the gNB. If the number of SSB indexes is 8. For the RGAP example in FIG4 , the SSB burst period is 40ms, the PRACH configuration period is 10ms, and the least common multiple of the two is 40ms, then RGAPP needs to be a multiple of 40ms and can form a SSB-to-RO group mapping cycle pattern. As shown in FIG16 , the gNB directly configures L to 9, which can satisfy that RGAPP is an SSB-to-RO group mapping pattern and is a multiple of 40ms.
  • Fig. 17 is another example diagram of the time period of the embodiment of the present application. As shown in Fig. 17, the RO group in RGAP 8 can also be used to map a certain SSB index in the SSB index.
  • L is the minimum value that can form an SSB-to-RO group mapping pattern. If the number of SSB indexes is 8. For the RGAP example in Figure 4, the SSB burst period is 40ms, the PRACH configuration period is 10ms, and the least common multiple of the two is 40ms, then RGAPP needs to be a multiple of 40ms and can form a SSB-to-RO group mapping cycle pattern. Then L is at least 9, which can satisfy that RGAPP is an SSB-to-RO group mapping pattern and is a multiple of 40ms.
  • the first period is at least based on a PRACH configuration period A multiple of a maximum value in an SSB burst period is determined, the multiple being an integer greater than or equal to 1.
  • the PRACH configuration period is P1
  • RGAPP L*P.
  • L is a value directly configured by the gNB or a value in a candidate value set configured by the gNB; for another example, L is the minimum value among the candidate values; for another example, L is the minimum value that can form an SSB-to-RO group mapping pattern.
  • a "RO group association pattern period” contains L “RO group association period (RGAP)", where L ⁇ 1 and is an integer.
  • RGAPP is a multiple of the maximum value of all SSB indices mapped at least once and in the PRACH configuration period and SSB burst period.
  • the ROs/RO groups within the RO group association pattern period can determine a repeatable SSB-to-RO group pattern.
  • FIG18 is another example diagram of the time period of an embodiment of the present application.
  • L is a value directly configured by the gNB, or a value in a set of candidate values configured by the gNB. If the number of SSB indexes is 4. For the RGAP example in FIG4 , the SSB burst period is 40ms, the PRACH configuration period is 10ms, and the maximum value of the two is 40ms, then the RGAPP needs to be a multiple of 40ms and can form a SSB-to-RO group mapping cycle pattern. As shown in FIG18 , the gNB can directly configure L to 6, which can satisfy that the RGAPP is an SSB-to-RO group mapping pattern and is a multiple of 40ms.
  • FIG19 is another example diagram of the time period of an embodiment of the present application. As shown in FIG19 , 16 ROs in RGAP 4-5 can also be used to map two SSB indexes in the SSB index.
  • L is the minimum value that can form an SSB-to-RO group mapping pattern. If the number of SSB indexes is 4. For the RGAP example in Figure 4, the SSB burst period is 40ms, the PRACH configuration period is 10ms, and the maximum of the two is 40ms, then RGAPP needs to be a multiple of 40ms and can form a SSB-to-RO group mapping cycle pattern. Then L is at least 6, which can satisfy that RGAPP is an SSB-to-RO group mapping pattern and is a multiple of 40ms.
  • the first period is determined at least according to a multiple of a predetermined value (160 ms), where the multiple is an integer greater than or equal to 1.
  • RO group association pattern period is L times of 160 ms.
  • L is a value directly configured by the gNB, or a value in a candidate value set configured by the gNB; for another example, L is a minimum value among the candidate values; for another example, L is a minimum value that can form an SSB-to-RO group mapping pattern.
  • a "RO group association pattern period” contains L “RO group association period (RGAP)", where L ⁇ 1 and is an integer.
  • RGAPP is a multiple of 160ms that maps all SSB indices at least once.
  • the ROs/RO groups within the RO group association pattern period can determine a repeatable SSB-to-RO group pattern.
  • FIG20 is another example diagram of the time period of an embodiment of the present application.
  • L is a value directly configured by the gNB, or a value in a candidate value set configured by the gNB. If the number of SSB indexes is 8.
  • RGAPP needs to be a multiple of 160ms and can form a SSB-to-RO group mapping cycle pattern.
  • the gNB directly configures L to 12, which can satisfy that RGAPP is an SSB-to-RO group mapping pattern and is 160ms.
  • ROs in RGAP 8 to 11 cannot map all SSB indexes once, so ROs in RGAP 8 to 11 are not used to map SSB index or are not used for PRACH transmissions.
  • FIG21 is another example diagram of the time period of an embodiment of the present application. As shown in FIG21, ROs in RGAP 8 to 11 can also be used to map four SSB indices in the SSB index.
  • FIG22 is another example diagram of the time cycle of an embodiment of the present application.
  • L is the minimum value that can form an SSB-to-RO group mapping pattern. If the number of SSB indexes is 4.
  • RGAPP needs to be a multiple of 160ms and can form a pattern of an SSB-to-RO group mapping cycle.
  • L is at least 12, which can satisfy that RGAPP is an SSB-to-RO group mapping pattern and is 160ms.
  • the above description is based on the case where the configuration of PRACH is msg1-FDM is 1, but the present application is not limited thereto.
  • the following description further describes the case where the third number of SSB indexes in the PRACH opportunity group (RO group) association period is mapped to the PRACH opportunity group (RO group) at least once.
  • the fourth number is the minimum number of PRACH opportunity group (RO group) association periods that map the third number of SSB indices.
  • the third number of SSB indexes are mapped to the PRACH opportunity group (RO group) at least once within a period associated with the PRACH opportunity group (RO group).
  • a RO group association period starts from system frame 0 and is determined according to PRACH configuration periods, so that all SSB indices are mapped to RO groups at least once.
  • the number of PRACH configuration periods (configuration period) included in the PRACH opportunity group (RO group) association period is a value in a candidate value set, and the number is the minimum value in the candidate value set that ensures that the third number of SSB indexes are mapped to the PRACH opportunity group (RO group) at least once in the PRACH opportunity group (RO group) association period.
  • the number of PRACH configuration periods (configuration period) included in the PRACH opportunity group (RO group) association period is a predefined value, or a value configured/indicated by a network device.
  • the RO group association period is determined according to the PRACH configuration period, including but not limited to the following methods:
  • the number of PRACH configuration periods included in the RO group association period is the minimum value in the candidate value set, and it can be guaranteed that at least all SSB indexes can be mapped to RO groups within the RO group association period;
  • the number of configuration periods included in the RO group association period is a predefined value or a value determined by the default rule, for example, the number of configuration periods included in the RO group association period is 8 or a default value (a positive integer), or the number of configuration periods included in the RO group association period is the minimum value that can ensure that at least all SSB indexes in the RO group association period can be mapped to RO groups;
  • the number of configuration periods included in the RO group association period is the value configured by the gNB.
  • the SSB index is not mapped on the PRACH opportunity (RO) or PRACH transmission is not performed on the PRACH opportunity (RO).
  • the ROs set no longer maps the SSB index or is not used for PRACH transmissions.
  • 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.
  • the following example illustrates how to determine the RO group association period.
  • FIG. 23 is another example diagram of the time period of an embodiment of the present application.
  • the PRACH configuration period is 10 ms, and the even frame and odd frame contain 8 and 6 valid ROs respectively.
  • the SSB period is 80 ms, and the number of ROs in the PRACH configuration period containing SSB is 0.
  • FIG. 23 shows the ROs in the 160 ms radio frames numbered 0 to 15.
  • the number of PRACH configuration periods included in the RO group association period is the minimum value in the candidate value set, and it can be guaranteed that at least all SSB indexes in the RO group association period can be mapped to the RO groups once.
  • the mapping relationship between the RO group association period and the PRACH configuration period is shown in Table 2 below.
  • the value of RGAP can be ⁇ 1, 2, 4, 8, 16, 32 ⁇ PRACH configuration period, and the actual value of RGAP is the minimum value in the candidate value set of all SSB indexes that can be mapped by the RO groups within the RGAP.
  • FIG. 24 is another example diagram of the time period of an embodiment of the present application.
  • the PRACH Configuration is used for multiple PRACH transmission with repetition number 8 and SSB index number 8, which can determine the valid ROs pattern after RO group association period.
  • 8 RO groups consisting of ROs in system frames 0 to 10 and 2 ROs in system frame 11 can map all 8 SSB indices.
  • RGAP needs to be the minimum value among ⁇ 1,2,4,8,16,32 ⁇ PRACH configuration periods, so RGAP is 16 PRACH configuration periods.
  • the remaining ROs set cannot form a SSB index and RO groups mapping cycle, then the ROs set no longer maps SSB index or is not used for PRACH transmissions. Therefore, after the ROs that map all SSB indexes are determined in the RGAP in Figure 24, the remaining 4 ROs in system frame 11 and the ROs in system frames 12 to 15 cannot form a RO group and SSB index mapping cycle, then these ROs no longer map SSB index or are not used for PRACH transmissions.
  • FIG25 is another example diagram of the time period of an embodiment of the present application.
  • the PRACH configuration is used for multiple PRACH transmissions with a repetition number of 4 and the number of SSB indices is 8, the valid ROs pattern after the RO group association period can be determined.
  • the ROs of system frames 0 to 4 and the 8 RO groups composed of 4 ROs in system frame 5 can map all 8 SSB indices.
  • the RGAP needs to be the minimum value among ⁇ 1, 2, 4, 8, 16, 32 ⁇ PRACH configuration periods, and the RGAP is 8 PRACH configuration periods.
  • the ROs set cannot form a SSB index and RO groups mapping cycle, then the ROs set no longer maps SSB index or is not used for PRACH transmissions. Therefore, after the ROs that map all SSB indexes are determined in RGAP 0 in Figure 25, the remaining 2 ROs in system frame 5 and the ROs in system frames 6 to 7 cannot form a RO group and SSB index mapping cycle, then these ROs no longer map SSB index or are not used for PRACH transmissions.
  • the number of configuration periods included in the RO group association period is a predefined value or a value determined by a default rule.
  • the number of configuration periods included in the RO group association period is a default value of 8 or another value (a positive integer), or the number of configuration periods included in the RO group association period is a minimum value that can ensure that at least all SSB indexes in the RO group association period can be mapped to RO groups.
  • FIG. 26 is another example diagram of the time period of an embodiment of the present application. As shown in FIG. 26, if the PRACH The configuration is used for multiple PRACH transmission with a repetition number of 8 and a number of SSB indices of 8.
  • the RGAP is predefined to consist of 16 PRACH configuration periods.
  • the ROs set cannot form a SSB index and RO groups mapping cycle, then the ROs set no longer maps SSB index or is not used for PRACH transmissions. Therefore, after the RGAP in Figure 26 determines the ROs that have mapped all SSB indexes, the remaining 4 ROs in system frame 11 and the ROs in system frames 12 to 15 cannot form a RO group and SSB index mapping cycle, then these ROs no longer map SSB index or are not used for PRACH transmissions.
  • FIG27 is another example diagram of the time period of an embodiment of the present application.
  • the number of PRACH configuration periods in the RGAP is the minimum value that can ensure that at least all SSB indexes in the RO group association period can be mapped to RO groups.
  • RGAP 0,1 contains at least 6 PRACH configuration periods, which can ensure that all SSB indexes can be mapped to RO groups.
  • the number of configuration periods included in the RO group association period is a number configured by the gNB.
  • the number of configuration periods included in the RO group association period is directly configured by the gNB, or the gNB configures it from a set of candidate values.
  • FIG28 is another example diagram of the time period of an embodiment of the present application.
  • the PRACH configuration is used for multiple PRACH transmission with a repetition number of 4, and the gNB directly configures the number of PRACH configuration periods included in the RGAP to be 8.
  • the ROs set no longer maps the SSB index or is not used for PRACH transmissions.
  • the remaining two ROs in system frame 5 and the ROs in system frames 6 to 7 cannot form an RO group and SSB index mapping cycle, so these ROs no longer map SSB index or are not used for PRACH transmissions.
  • a RO group association pattern period contains L RO group association periods, where L ⁇ 1 and is an integer.
  • the RO groups in the RO group association pattern period can map all SSB indexes at least once, and the ROs/RO groups in the RO group association pattern period can determine a repeatable SSB-to-RO group pattern.
  • this PRACH configuration is used for multiple PRACH transmission with a repetition number of 4 and an SSB index of 8, and the valid ROs pattern after the RO group association period can be determined.
  • FIG29 is another example diagram of the time period of the embodiment of the present application.
  • an RGAPP contains an RGAP, which can ensure that the ROs/RO groups within the RO group association pattern period determine a repeatable SSB-to-RO group pattern.
  • the "RO group association pattern period" can be determined according to multiples of the least common multiple of the PRACH configuration period and the SSB burst period, or according to multiples of the maximum value of the PRACH configuration period and the SSB burst period, or according to multiples of 160ms.
  • the PRACH configuration period is 10ms
  • the SSB burst period is 80ms
  • the PRACH configuration period is 10ms
  • the numbers of valid ROs in even frames and odd frames are 8 and 6 respectively
  • the valid ROs pattern is shown in Figure 23.
  • a "RO group association pattern period” contains L “RO group association period (RGAP)", where L ⁇ 1 and is an integer.
  • RGAPP is a multiple of the least common multiple of all SSB indices mapped at least once and the PRACH configuration period and the SSB burst period.
  • the ROs/RO groups within the RO group association pattern period can determine a repeatable SSB-to-RO group pattern.
  • This PRACH configuration is used for multiple PRACH transmission with a repetition number of 8 and an SSB index of 8.
  • FIG30 is another example diagram of the time period of an embodiment of the present application.
  • the PRACH configuration period is 10 ms
  • the SSB burst period is 80 ms
  • the least common multiple of the two is 80 ms.
  • RGAPP needs to be a multiple of 80 ms and can form a SSB-to-RO group mapping cycle pattern.
  • the gNB directly configures L to 1, which can satisfy that RGAPP is a SSB-to-RO group mapping pattern and is a multiple of 80 ms.
  • FIG31 is another example diagram of the time period of the embodiment of the present application.
  • the SSB burst period is 80 ms
  • the PRACH configuration period is 10 ms
  • the least common multiple of the two is 80 ms.
  • RGAPP needs to be a multiple of 80 ms and can form a SSB-to-RO group mapping cycle pattern.
  • L is at least 1, which can satisfy that RGAPP is a SSB-to-RO group mapping pattern and is a multiple of 80 ms.
  • a "RO group association pattern period” contains L “RO group association period (RGAP)", where L ⁇ 1 and is an integer.
  • RGAPP is a multiple of the maximum value of all SSB indices mapped at least once and in the PRACH configuration period and SSB burst period.
  • the ROs/RO groups within the RO group association pattern period can determine a repeatable SSB-to-RO group pattern.
  • the gNB directly configures it, or the gNB configures a value in the candidate value set. If the PRACH configuration is used for multiple PRACH transmission with a repetition number of 8 and the SSB index number is 8.
  • the SSB burst period is 80ms
  • the PRACH configuration period is 10ms
  • the maximum of the two is 80ms. Therefore, RGAPP needs to be a multiple of 80ms and can form a SSB-to-RO group mapping cycle pattern.
  • the gNB directly configures L to 1, which can satisfy RGAPP as a SSB-to-RO group mapping pattern and a multiple of 80ms.
  • the SSB burst period is 80ms and the PRACH configuration period is 10ms.
  • the maximum of the two is 80ms. Therefore, RGAPP needs to be a multiple of 80ms and can form an SSB-to-RO group.
  • the minimum value of L is 1, which satisfies that RGAPP is a SSB-to-RO group mapping pattern and is a multiple of 80ms.
  • a "RO group association pattern period” contains L “RO group association period (RGAP)", where L ⁇ 1 and is an integer.
  • RGAPP is a multiple of 160ms that maps all SSB indexes at least once.
  • the ROs/RO groups within the RO group association pattern period can determine a repeatable SSB-to-RO group pattern.
  • L is a value directly configured by the gNB, or a value in a set of candidate values configured by the gNB; for another example, L is the minimum value that can form an SSB-to-RO group mapping pattern.
  • the PRACH opportunity group (RO group) is a second number N PRACH opportunities (RO) having adjacent time domain resources and the same frequency domain resources.
  • an RO group is N ROs that are close in time domain, and N is the repetition number of multiple PRACH transmissions to which the PRACH configuration applies.
  • N ROs that are adjacent in time domain means that the N ROs in the RO group are ROs with the closest time domain resource intervals, or the time domain resource indexes of the ROs are continuous.
  • the same frequency domain resources can also mean the same frequency domain resource index.
  • mapping order of SSB index to PRACH opportunity group includes:
  • RO groups frequency domain multiplexed PRACH opportunity groups
  • ROs PRACH opportunities
  • RO group For a PRACH opportunity group (RO group) or PRACH opportunity (RO) multiplexed in the time domain, they are mapped in the increasing order of the time domain resource index within the PRACH time slot;
  • the PRACH time slots are mapped in increasing order of index.
  • FIG32 is an example diagram of SSB-to-RO group mapping according to an embodiment of the present application. As shown in FIG32 , when the repetition number is 4, SSB0 is mapped to RO group 0, SSB1 is mapped to RO group 1, ..., SSB7 is mapped to RO group 7.
  • FIG. 33 is an example diagram of SSB-to-RO group mapping according to an embodiment of the present application.
  • the repetition number is 2, SSB0 is mapped to RO group 0, SSB1 is mapped to RO group 1, ..., SSB7 is mapped to RO group 7.
  • FIG3 to FIG31 are described by taking the case where msg1-FDM is 1 as an example, and exemplarily showing the case where the number of resources in the frequency domain is 1, but the present application is not limited thereto.
  • PRACH configuration periods are 10ms, and the SSB burst period is 80ms.
  • RGAP can contain ⁇ 1,2,4,8,16 ⁇ PRACH configuration periods.
  • the composed pattern is shown in Figure 34, and 160ms is an association pattern period.
  • PRACH configuration periods is 10ms
  • SSB burst period is 80ms.
  • RGAP can contain ⁇ 1,2,4,8,16 ⁇ PRACH configuration periods.
  • repetition number is 4, the pattern is as shown in Figure 35.
  • 160ms can form an RGAPP, and the ROs of the last two RGAPs can no longer form an SSB-to-RO group mapping cycle and are no longer used for PRACH transmission.
  • FIG36 is another example diagram of the time period of an embodiment of the present application. As shown in FIG36, the ROs of the last two RGAPs can no longer form an SSB-to-RO group mapping cycle, and 4 more SSBs can be mapped for multiple PRACH transmission.
  • the PRACH configuration period is 10ms and the SSB burst period is 80ms.
  • the RGAP may include ⁇ 1, 2, 4, 8, 16 ⁇ PRACH configuration periods.
  • the pattern is as shown in FIG37.
  • PRACH configuration periods is 10ms
  • SSB burst period is 80ms.
  • RGAP can contain ⁇ 1,2,4,8,16 ⁇ PRACH configuration periods.
  • repetition number is 4, the pattern is as shown in Figure 38.
  • the PRACH resource configuration of the embodiment of the present application is further described below, and the time period X can be determined based on these configurations.
  • the time period is determined according to the maximum value of the number of repetitions of PRACH transmission in all PRACH configurations.
  • the time period is determined according to the maximum value of the different numbers of repetitions corresponding to all the feature combinations;
  • the time period is determined according to the maximum value of the different numbers of repetitions corresponding to the one feature.
  • Figure 39 is an example diagram of the PRACH configuration of an embodiment of the present application.
  • the PRACH configuration may include BWP-UplinkCommon, AdditionalRACH-Config, rach-ConfigCommon, featureCombinationPreambles, etc.
  • BWP-UplinkCommon AdditionalRACH-Config
  • rach-ConfigCommon featureCombinationPreambles
  • one K value or multiple K values may be determined, that is, one time period X or multiple time periods X.
  • Multiple PRACH applicable to different AdditionalRACH-Configs in BWP-UplinkCommon transmission, repetition number may be different.
  • all featureCombinationPreambles in rach-ConfigCommon in the 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 different multiple PRACH transmissions and repetition numbers.
  • 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 terminal device can quickly obtain RO resources for sending multiple PRACH transmissions and ensure the sending of multiple PRACH transmissions, thereby not only improving the coverage capability of the system but also improving the utilization rate of RO resources.
  • different methods for determining the repetition period of the SSB and RO group mapping patterns may be used, or the same method for determining the repetition period of the SSB and RO group mapping patterns may be used.
  • determining the RO group association period through the RO group can maximize the use of RO resources for multiple PRACH transmissions, thereby improving the resource utilization of PRACH transmission. Determining the RO group association period through SSB-to-RO group mapping can reduce the workload of standardization.
  • the terminal device determines a second number of ROs associated with a time period, wherein the time period includes a first number of first periods, and the PRACH opportunity group (RO group) in the first period maps at least a third number of synchronization signal block (SSB) indexes, and the PRACH opportunity (RO) or PRACH opportunity group (RO group) in the first period forms a repeated pattern.
  • the terminal device can quickly obtain the RO resources sent by multiple PRACHs, and ensure that all SSBs in the multiple PRACH transmissions are mapped to RO not only improves the coverage capability of the system, but also improves the utilization rate of RO resources.
  • 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. 40 is a schematic diagram of a PRACH receiving method according to an embodiment of the present application. As shown in FIG. 40 , 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 PRACH opportunities (RO) associated with the time period; wherein the time period includes a first number of first periods, a PRACH opportunity group (RO group) in the first period maps at least a third number of synchronization signal block (SSB) indexes, and the PRACH opportunities (RO) or PRACH opportunity groups (RO group) in the first period form a repeated pattern.
  • the time period includes a first number of first periods, a PRACH opportunity group (RO group) in the first period maps at least a third number of synchronization signal block (SSB) indexes, and the PRACH opportunities (RO) or PRACH opportunity groups (RO group) in the first period form a repeated pattern.
  • SSB synchronization signal block
  • the method may further include:
  • the network device sends PRACH configuration information and/or indication information to the terminal device.
  • FIG. 40 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 records of the above FIG. 40.
  • the first period is a PRACH opportunity group (RO group) associated pattern period (GRAPP)
  • the second number is the repetition number of the PRACH transmission, and the second number is an integer greater than 1
  • the third number is a value configured and/or indicated by the network device, and the third number is an integer greater than or equal to 1.
  • the PRACH opportunity group (RO group) association pattern period includes a fourth number of second periods, and the fourth number is an integer greater than or equal to 1;
  • the fourth number is a value configured and/or indicated by the network device, or the fourth number is a default value or a fixed value, or the fourth number is a value determined by the terminal device.
  • the second period is a PRACH opportunity group (RO group) association period (RGAP), and the PRACH opportunity group (RO group) association period is determined at least according to a PRACH configuration period.
  • RO group PRACH opportunity group
  • RGAP PRACH opportunity group association period
  • the fourth number is the minimum number of PRACH opportunity group (RO group) association periods that map the third number of synchronization signal block (SSB) indices and form an SSB to PRACH opportunity group (RO group) mapping pattern.
  • RO group PRACH opportunity group
  • PRACH opportunity group for PRACH transmissions with a second number of repetitions, there is at least one PRACH opportunity group (RO group) in the PRACH opportunity group (RO group) association period.
  • 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) includes at least multiple PRACH transmissions.
  • the number of PRACH configuration periods (configuration period) included in the PRACH opportunity group (RO group) association period is a value in a candidate value set, and the number is the minimum value in the candidate value set to ensure that at least one PRACH opportunity group (RO group) is determined in the PRACH opportunity group (RO group) association period.
  • the number of PRACH configuration periods (configuration period) included in the PRACH opportunity group (RO group) association period is a predefined value, or a value configured/indicated by a network device.
  • the fourth number is the minimum number of PRACH opportunity group (RO group) association periods that map the third number of SSB indices.
  • the third number of SSB indexes are mapped to the PRACH opportunity group (RO group) at least once within a period associated with the PRACH opportunity group (RO group).
  • 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) includes at least multiple PRACH transmissions.
  • the PRACH opportunity group (RO group) associated period includes the PRACH
  • the number of configuration periods is a value in a candidate value set, and the number is a minimum value in the candidate value set that ensures that the third number of SSB indexes are mapped to the PRACH opportunity group (RO group) at least once in the PRACH opportunity group (RO group) association period.
  • the number of PRACH configuration periods (configuration period) included in the PRACH opportunity group (RO group) association period is a predefined value, or a value configured/indicated by a network device.
  • the time period is determined according to the maximum value of the number of repetitions of PRACH transmission in all PRACH configurations.
  • the time period is determined according to the maximum value of the different numbers of repetitions corresponding to all the feature combinations;
  • the time period is determined according to the maximum value of the different numbers of repetitions corresponding to the one feature.
  • the first period is determined at least based on a multiple of the least common multiple of a PRACH configuration period and an SSB burst period, and the multiple is an integer greater than or equal to 1.
  • the first period is determined at least based on a multiple of a maximum value of a PRACH configuration period and an SSB burst period, and the multiple is an integer greater than or equal to 1.
  • the first period is determined at least according to a multiple of a predetermined value (160 ms), where the multiple is an integer greater than or equal to 1.
  • the first number is a value configured and/or indicated by a network device, or the first number is a default value or a fixed value, or the first number is a value determined by the terminal device, and the first number is an integer greater than or equal to 1.
  • the maximum value of the time period is T1, and/or the maximum value of the first period is T2.
  • the SSB index is not mapped on the PRACH opportunity (RO) or PRACH transmission is not performed on the PRACH opportunity (RO).
  • a fifth number of SSB indexes are mapped on the PRACH opportunities (RO), the fifth number is less than the third number, and the fifth number is an integer greater than or equal to 1.
  • the fifth number of SSB indexes are the first M SSB indexes of the third number of SSB indexes, or, are the last M SSB indexes of the third number of SSB indexes, or, are random M SSB indexes of the third number of SSB indexes, where M is an integer greater than or equal to 1.
  • the PRACH opportunity group (RO group) is a second number N PRACH opportunities (RO) having adjacent time domain resources and the same frequency domain resources.
  • mapping order of SSB index to PRACH opportunity group includes:
  • RO groups frequency domain multiplexed PRACH opportunity groups
  • ROs PRACH opportunities
  • RO group For a PRACH opportunity group (RO group) or PRACH opportunity (RO) multiplexed in the time domain, they are mapped in the increasing order of the time domain resource index within the PRACH time slot;
  • the PRACH time slots are mapped in increasing order of index.
  • the terminal device determines a second number of ROs associated with a time period, wherein the time period includes a first number of first periods, and the PRACH opportunity groups (RO groups) in the first period are at least A third number of synchronization signal block (SSB) indexes are mapped, and the PRACH opportunities (RO) or PRACH opportunity groups (RO groups) in the first cycle form a repeated pattern.
  • the terminal device can quickly obtain the RO resources sent by multiple PRACHs, and ensure that all SSBs in the multiple PRACH transmissions are mapped to the ROs, which not only improves the coverage capability of the system, but also improves the utilization rate of the RO resources.
  • 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.
  • FIG41 is a schematic diagram of a PRACH transmitting device according to an embodiment of the present application.
  • a PRACH transmitting device 4100 includes:
  • a processing unit 4101 which determines a second number of PRACH opportunities (RO) associated with a time period; wherein the time period includes a first number of first periods, a PRACH opportunity group (RO group) in the first period maps at least a third number of synchronization signal block (SSB) indexes, and the PRACH opportunities (RO) or PRACH opportunity groups (RO group) in the first period form a repeated pattern;
  • the time period includes a first number of first periods
  • a PRACH opportunity group (RO group) in the first period maps at least a third number of synchronization signal block (SSB) indexes, and the PRACH opportunities (RO) or PRACH opportunity groups (RO group) in the first period form a repeated pattern;
  • SSB synchronization signal block
  • the sending unit 4102 is configured to repeatedly send a preamble on the second number of ROs.
  • the PRACH transmitting apparatus 4100 may further include:
  • the receiving unit 4103 receives PRACH configuration information and/or indication information sent by the network device.
  • the PRACH transmitting device 4100 may also include other components or modules, and the specific contents of these components or modules may refer to the relevant technology.
  • FIG. 41 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, the time period includes a first number of first periods, the PRACH opportunity group (RO group) in the first period maps at least a third number of synchronization signal block (SSB) indexes, and the PRACH opportunity (RO) or PRACH opportunity group (RO group) in the first period forms a repeated pattern.
  • the terminal device can quickly Obtaining RO resources for multi-PRACH transmission and ensuring that all SSBs in multi-PRACH transmission are mapped to RO not only improves the coverage capability of the system, but also improves the utilization rate of RO resources.
  • 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.
  • FIG42 is a schematic diagram of a PRACH receiving device according to an embodiment of the present application.
  • a PRACH receiving device 4200 includes:
  • a receiving unit 4201 which receives a preamble repeatedly sent by a terminal device on a second number of ROs
  • the terminal device determines the second number of PRACH opportunities (RO) associated with the time period; wherein the time period includes a first number of first periods, a PRACH opportunity group (RO group) in the first period maps at least a third number of synchronization signal block (SSB) indexes, and the PRACH opportunities (RO) or PRACH opportunity groups (RO group) in the first period form a repeated pattern.
  • the time period includes a first number of first periods, a PRACH opportunity group (RO group) in the first period maps at least a third number of synchronization signal block (SSB) indexes, and the PRACH opportunities (RO) or PRACH opportunity groups (RO group) in the first period form a repeated pattern.
  • SSB synchronization signal block
  • the PRACH receiving apparatus 4200 may further include:
  • the sending unit 4202 sends PRACH configuration information and/or indication information to the terminal device.
  • the PRACH receiving device 4200 may also include other components or modules, and the specific contents of these components or modules may refer to the relevant technology.
  • FIG. 42 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 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, the time period includes a first number of first periods, the PRACH opportunity group (RO group) in the first period maps at least a third number of synchronization signal block (SSB) indexes, and the PRACH opportunity (RO) or PRACH opportunity group (RO group) in the first period forms a repeated pattern.
  • 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, which not only improves the coverage capability of the system, but also improves the utilization rate of RO resources.
  • 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 the second number of PRACH opportunities (RO) associated with the time period; wherein the time period includes a first number of first periods, a PRACH opportunity group (RO group) in the first period maps at least a third number of synchronization signal block (SSB) indexes, and the PRACH opportunities (RO) or PRACH opportunity groups (RO group) in the first period form a repeated pattern;
  • SSB synchronization signal block
  • a network device receives a preamble that is repeatedly sent by the terminal device on a 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.
  • FIG43 is a schematic diagram of the composition of a network device according to an embodiment of the present application.
  • the network device 4300 may include: a processor 4310 (e.g., a central processing unit CPU) and a memory 4320; the memory 4320 is coupled to the processor 4310.
  • the memory 4320 may store various data; in addition, it may store a program 4330 for information processing, and the program 4330 may be executed under the control of the processor 4310.
  • the processor 4310 may be configured to execute a program to implement the PRACH receiving method as described in the embodiment of the second aspect.
  • the processor 4310 may be configured to perform the following control: the receiving terminal device repeatedly sends a preamble on a second number of ROs;
  • the terminal device determines the second number of PRACH opportunities (RO) associated with the time period; wherein the time period includes a first number of first periods, a PRACH opportunity group (RO group) in the first period maps at least a third number of synchronization signal block (SSB) indexes, and the PRACH opportunities (RO) or PRACH opportunity groups (RO group) in the first period form a repeated pattern.
  • the time period includes a first number of first periods, a PRACH opportunity group (RO group) in the first period maps at least a third number of synchronization signal block (SSB) indexes, and the PRACH opportunities (RO) or PRACH opportunity groups (RO group) in the first period form a repeated pattern.
  • SSB synchronization signal block
  • the network device 4300 may also include: a transceiver 4340 and an antenna 4350, 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 4300 does not necessarily include all the components shown in FIG43; in addition, the network device 4300 may also include components not shown in FIG43, 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.
  • FIG44 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • the terminal device 4400 can The system may include a processor 4410 and a memory 4420; the memory 4420 stores data and programs and is coupled to the processor 4410. It should be noted that this figure is exemplary; other types of structures may also be used to supplement or replace this structure to implement telecommunication functions or other functions.
  • the processor 4410 may be configured to execute a program to implement the PRACH transmission method as described in the embodiment of the first aspect.
  • the processor 4410 may be configured to perform the following control: determining a second number of PRACH opportunities (RO) associated with a time period; wherein the time period includes a first number of first periods, a PRACH opportunity group (RO group) in the first period maps at least a third number of synchronization signal block (SSB) indexes, and the PRACH opportunities (RO) or PRACH opportunity groups (RO group) in the first period form a repeated pattern; and repeatedly transmitting a preamble on the second number of ROs.
  • RO PRACH opportunities
  • the terminal device 4400 may further include: a communication module 4430, an input unit 4440, a display 4450, and a power supply 4460.
  • 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 terminal device 4400 does not necessarily include all the components shown in FIG44 , and the above components are not necessary; in addition, the terminal device 4400 may also include components not shown in FIG44 , 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 may correspond to various hardware modules. Blocks. 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 using, for example, 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.
  • the functional blocks described in the drawings and/or one or more combinations of functional blocks it can be implemented as a general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, 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
  • it can also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in communication with a DSP, or any other such configuration.
  • a PRACH sending method comprising:
  • the terminal device determines a second number of PRACH opportunities (RO) associated with a time period; wherein the time period includes a first number of first periods, a PRACH opportunity group (RO group) in the first period maps at least a third number of synchronization signal block (SSB) indexes, and the PRACH opportunities (RO) or PRACH opportunity groups (RO group) in the first period form a repeated pattern;
  • RO PRACH opportunities
  • SSB synchronization signal block
  • the terminal device repeatedly sends a preamble on the second number of ROs.
  • the first period is a PRACH opportunity group (RO group) Associated pattern period (GRAPP)
  • the second number is the repetition number (repetition number) sent by the PRACH, and the second number is an integer greater than 1
  • the third number is a value configured and/or indicated by the network device, and the third number is an integer greater than or equal to 1.
  • the PRACH opportunity group (RO group) association pattern period includes a fourth number of second periods, and the fourth number is an integer greater than or equal to 1;
  • the fourth number is a value configured and/or indicated by the network device, or the fourth number is a default value or a fixed value, or the fourth number is a value determined by the terminal device.
  • the second period is a PRACH opportunity group (RO group) association period (RGAP), and the PRACH opportunity group (RO group) association period is determined at least according to a PRACH configuration period (configuration period).
  • RO group PRACH opportunity group
  • configuration period PRACH configuration period
  • the fourth number is the minimum number of PRACH opportunity group (RO group) association cycles that map the third number of synchronization signal block (SSB) indices and form an SSB to PRACH opportunity group (RO group) mapping pattern.
  • the PRACH transmission not performed on the PRACH opportunity (RO) includes at least multiple PRACH transmission (multiple PRACH transmission).
  • the number of PRACH configuration periods (configuration period) included in the PRACH opportunity group (RO group) association period is a value in a candidate value set, and the number is the minimum value in the candidate value set that ensures that at least one PRACH opportunity group (RO group) is determined in the PRACH opportunity group (RO group) association period.
  • the PRACH transmission not performed on the PRACH opportunity (RO) includes at least multiple PRACH transmission (multiple PRACH transmission).
  • the number of PRACH configuration periods (configuration period) included in the PRACH opportunity group (RO group) association period is a value in a candidate value set, and the number is the minimum value in the candidate value set that ensures that the third number of SSB indexes are mapped to the PRACH opportunity group (RO group) at least once in the PRACH opportunity group (RO group) association period.
  • a method according to any one of Notes 11 to 14, wherein the number of PRACH configuration periods (configuration period) included in the PRACH opportunity group (RO group) association period is a predefined value, or a value configured/indicated by a network device.
  • the time period is determined according to the maximum value of the number of repetitions of PRACH transmission in all PRACH configurations.
  • the time period is determined according to the maximum value of the different numbers of repetitions corresponding to all the feature combinations;
  • a PRACH configuration with PRACH transmission For a feature or feature combination in the uplink common configuration, a PRACH configuration with PRACH transmission, and One of the characteristics corresponds to a PRACH transmission with different repetition numbers, and the time period is determined according to the maximum value of the different repetition numbers corresponding to the one characteristic.
  • the first period is determined at least based on a multiple of the least common multiple of a PRACH configuration period and an SSB burst period, and the multiple is an integer greater than or equal to 1.
  • the first period is determined at least based on a multiple of a maximum value of a PRACH configuration period and an SSB burst period, and the multiple is an integer greater than or equal to 1.
  • the first number is a value configured and/or indicated by the network device, or the first number is a default value or a fixed value, or the first number is a value determined by the terminal device, and the first number is an integer greater than or equal to 1.
  • the fifth number of SSB indexes are the first M SSB indexes among the third number of SSB indexes, or the last M SSB indexes among the third number of SSB indexes, or random M SSB indexes among the third number of SSB indexes, where M is an integer greater than or equal to 1.
  • the PRACH opportunity group is a second number N of PRACH opportunities (RO) having adjacent time domain resources and the same frequency domain resources.
  • mapping order of SSB index to PRACH opportunity group includes:
  • RO groups frequency domain multiplexed PRACH opportunity groups
  • ROs PRACH opportunities
  • RO group For a PRACH opportunity group (RO group) or PRACH opportunity (RO) multiplexed in the time domain, they are mapped in the increasing order of the time domain resource index within the PRACH time slot;
  • the PRACH time slots are mapped in increasing order of index.
  • a PRACH receiving method comprising:
  • the 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 PRACH opportunities (RO) associated with the time period; wherein the time period includes a first number of first periods, a PRACH opportunity group (RO group) in the first period maps at least a third number of synchronization signal block (SSB) indexes, and the PRACH opportunities (RO) or PRACH opportunity groups (RO group) in the first period form a repeated pattern.
  • the time period includes a first number of first periods, a PRACH opportunity group (RO group) in the first period maps at least a third number of synchronization signal block (SSB) indexes, and the PRACH opportunities (RO) or PRACH opportunity groups (RO group) in the first period form a repeated pattern.
  • SSB synchronization signal block
  • the first period is a PRACH opportunity group (RO group) associated pattern period (GRAPP)
  • the second number is the repetition number of the PRACH transmission, and the second number is an integer greater than 1
  • the third number is a value configured and/or indicated by a network device, and the third number is an integer greater than or equal to 1.
  • the PRACH opportunity group (RO group) association pattern period includes a fourth number of second periods, and the fourth number is an integer greater than or equal to 1;
  • the fourth number is a value configured and/or indicated by the network device, or the fourth number is a default value or a fixed value, or the fourth number is a value determined by the terminal device.
  • the second period is a PRACH opportunity group (RO group) association period (RGAP)
  • the PRACH opportunity group (RO group) association period is determined at least according to a PRACH configuration period (configuration period).
  • the fourth quantity is a synchronization that maps the third quantity
  • SSB signal block
  • the PRACH transmission not performed on the PRACH opportunity (RO) includes at least multiple PRACH transmission (multiple PRACH transmission).
  • a method according to any one of Notes 32 to 35, wherein the number of PRACH configuration periods (configuration period) included in the PRACH opportunity group (RO group) association period is a value in a candidate value set, and the number is the minimum value in the candidate value set that ensures that at least one PRACH opportunity group (RO group) is determined in the PRACH opportunity group (RO group) association period.
  • the fourth number is the minimum number of PRACH opportunity group (RO group) association periods mapping the third number of SSB indices.
  • the number of PRACH configuration periods (configuration period) included in the association period is a value in the candidate value set, and the number is the minimum value in the candidate value set that ensures that the third number of SSB indexes are mapped to the PRACH opportunity group (RO group) at least once in the PRACH opportunity group (RO group) association period.
  • the time period is determined according to the maximum value of the number of repetitions of PRACH transmission in all PRACH configurations.
  • the time period is determined according to the maximum value of the different numbers of repetitions corresponding to all the feature combinations;
  • the time period is determined according to the maximum value of the different numbers of repetitions corresponding to the one feature.
  • a method according to any one of Notes 28 to 44, wherein the first period is determined at least based on a multiple of the least common multiple of a PRACH configuration period and an SSB burst period, and the multiple is an integer greater than or equal to 1.
  • the first number is a value configured and/or indicated by the network device, or the first number is a default value or a fixed value, or the first number is a value determined by the terminal device, and the first number is an integer greater than or equal to 1.
  • the fifth number of SSB indexes are the first M SSB indexes among the third number of SSB indexes, or the last M SSB indexes among the third number of SSB indexes, or random M SSB indexes among the third number of SSB indexes, where M is an integer greater than or equal to 1.
  • the PRACH opportunity group (RO group) is a second number N PRACH opportunities (RO) having adjacent time domain resources and the same frequency domain resources.
  • mapping order of SSB index to PRACH opportunity group includes:
  • RO groups frequency domain multiplexed PRACH opportunity groups
  • ROs PRACH opportunities
  • RO group For a PRACH opportunity group (RO group) or PRACH opportunity (RO) multiplexed in the time domain, they are mapped in the increasing order of the time domain resource index within the PRACH time slot;
  • the PRACH time slots are mapped in increasing order of index.
  • a terminal device comprises 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 27.
  • 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 28 to 54.

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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PRACH机会(RO)；其中所述时间周期包括第一数量的第一周期，所述第一周期中的PRACH机会组(RO group)至少映射第三数量的同步信号块(SSB)索引，并且所述第一周期中的PRACH机会(RO)或PRACH机会组(RO group)形成重复的图样(pattern)；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)。PRACH的RO资源在SSB-to-RO association pattern period内是确定的并且在之后的时间重复。SSB-to-RO association pattern period中包括一个或多个SSB-to-RO association period，其中SSB-to-RO association period是通过SSB与RO之间的映射确定的，SSB-to-RO association period中没有映射SSB的RO不能用于PRACH发送(PRACH transmission)。
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)。对于multiple PRACH transmission引入SSB-to-RO group的映射方式，如果沿用SSB-to-RO association pattern period确定方式，由于SSB-to-RO的映射方式变为了SSB-to-RO group的映射方式，association period中未映射SSB的RO无法用于确定RO group，因此造成了RO资源的浪费。
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PRACH机会(RO)；其中所述时间周期包括第一数量的第一周期，所述第一周期中的PRACH机会组(RO group)至少映射第三数量的同步信号块(SSB)索引，并且所述第一周期中的PRACH机会(RO)或PRACH机会组(RO group)形成重复的图样(pattern)；
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PRACH机会(RO)；其中所述时间周期包括第一数量的第一周期，所述第一周期中的PRACH机会组(RO group)至少映射第三数量的同步信号块(SSB)索引，并且所述第一周期中的PRACH机会(RO)或PRACH机会组(RO group)形成重复的图样(pattern)；
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PRACH机会(RO)；其中所述时间周期包括第一数量的第一周期，所述第一周期中的PRACH机会组(RO group)至少映射第三数量的同步信号块(SSB)索引，并且所述第一周期中的PRACH机会(RO)或PRACH机会组(RO group)形成重复的图样(pattern)。
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PRACH机会(RO)；其中所述时间周期包括第一数量的第一周期，所述第一周期中的PRACH机会组(RO group)至少映射第三数量的同步信号块(SSB)索引，并且所述第一周期中的PRACH机会(RO)或PRACH机会组(RO group)形成重复的图样(pattern)。
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，其确定所述第二数量的与时间周期相关的PRACH机会(RO)；其中所述时间周期包括第一数量的第一周期，所述第一周期中的PRACH机会组(RO group)至少映射第三数量的同步信号块(SSB)索引，并且所述第一周期中的PRACH机会(RO)或PRACH机会组(RO group)形成重复的图样(pattern)；
网络设备，其接收所述终端设备在第二数量的RO上重复发送的前导(preamble)。
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，所述时间周期包括第一数量的第一周期，所述第一周期中的PRACH机会组(RO group)至少映射第三数量的同步信号块(SSB)索引，并且所述第一周期中的PRACH机会(RO)或PRACH机会组(RO group)形成重复的图样(pattern)。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，不仅提高了系统的覆盖能力，而且还能提升RO资源的利用率。
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是本申请实施例的时间周期的一示例图；
图4是本申请实施例的时间周期的另一示例图；
图5是本申请实施例的时间周期的另一示例图；
图6是本申请实施例的时间周期的另一示例图；
图7是本申请实施例的时间周期的另一示例图；
图8是本申请实施例的时间周期的另一示例图；
图9是本申请实施例的时间周期的另一示例图；
图10是本申请实施例的时间周期的另一示例图；
图11是本申请实施例的时间周期的另一示例图；
图12是本申请实施例的时间周期的另一示例图；
图13是本申请实施例的时间周期的另一示例图；
图14是本申请实施例的时间周期的另一示例图；
图15是本申请实施例的时间周期的另一示例图；
图16是本申请实施例的时间周期的另一示例图；
图17是本申请实施例的时间周期的另一示例图；
图18是本申请实施例的时间周期的另一示例图；
图19是本申请实施例的时间周期的另一示例图；
图20是本申请实施例的时间周期的另一示例图；
图21是本申请实施例的时间周期的另一示例图；
图22是本申请实施例的时间周期的另一示例图；
图23是本申请实施例的时间周期的另一示例图；
图24是本申请实施例的时间周期的另一示例图；
图25是本申请实施例的时间周期的另一示例图；
图26是本申请实施例的时间周期的另一示例图；
图27是本申请实施例的时间周期的另一示例图；
图28是本申请实施例的时间周期的另一示例图；
图29是本申请实施例的时间周期的另一示例图；
图30是本申请实施例的时间周期的另一示例图；
图31是本申请实施例的时间周期的另一示例图；
图32是本申请实施例的SSB-to-RO group映射的一示例图；
图33是本申请实施例的SSB-to-RO group映射的另一示例图；
图34是本申请实施例的时间周期的另一示例图；
图35是本申请实施例的时间周期的另一示例图；
图36是本申请实施例的时间周期的另一示例图；
图37是本申请实施例的时间周期的另一示例图；
图38是本申请实施例的时间周期的另一示例图；
图39是本申请实施例的PRACH配置的一示例图；
图40是本申请实施例的PRACH接收方法的一示意图；
图41是本申请实施例的PRACH发送装置的一示意图；
图42是本申请实施例的PRACH接收装置的一示意图；
图43是本申请实施例的网络设备的一示意图；
图44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)，需要在时域上的至少多个RO上重复发送前导(preamble)。如果沿用SSB-to-RO association pattern period确定方式，由于SSB-to-RO的映射方式变为了SSB-to-RO group的映射方式，association period中未映射SSB的RO无法用于确定RO group，因此造成了RO资源的浪费。
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PRACH机会(RO)；其中所述时间周期包括第一数量的第一周期，所述第一周期中的PRACH机会组(RO group)至少映射第三数量的同步信号块(SSB)索引，并且所述第一周期中的PRACH机会(RO)或PRACH机会组(RO group)形成重复的图样(pattern)；
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。
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 1repetion，PRACH repetition，multiple MSG1transmissions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。
在一些实施例中，时间周期(time period)X例如以毫秒(ms)为单位。所述第一周期为PRACH机会组(RO group)关联图样周期(GRAPP)，所述时间周期包括第一数量K的第一周期，所述第一数量K为大于或等于1的整数。
所述第一数量可以为由网络设备配置和/或指示的值，或者，所述第一数量可以为默认值或固定值，或者，所述第一数量可以为由所述终端设备确定的值。
例如，K可以由网络设备通过信令直接配置和/或指示，也可以由网络设备通过其他参数配置，该其他参数例如是小区中的SSB索引数量，也可以是默认值或固定值，还可以是终端设备根据默认规则确定的值。
在一些实施例中，所述时间周期的最大值为T1，和/或，所述第一周期的最大值为T2。时间周期的单位例如为毫秒(ms)，第一周期的值例如为配置周期(configuration period)的倍数。
在一些实施例中，所述第二数量N为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。
在一些实施例中，PRACH机会组(RO group)至少映射第三数量的同步信号块(SSB)索引。所述第三数量为由网络设备配置和/或指示的值，所述第三数量为大于 或等于1的整数。
例如，第三数量为可以通过SIB1或ServingCellConfigCommon中的ssb-PositionsInBurst获得，本申请不限于此，也可以从其他参数获得，具体内容还可以参考相关技术。
在一些实施例中，所述PRACH机会组(RO group)关联图样周期包括第四数量L的第二周期，所述第四数量L为大于或等于1的整数；所述第四数量为由网络设备配置和/或指示的值，或者，所述第四数量为默认值或固定值，或者，所述第四数量为由所述终端设备确定的值。
例如，L可以由网络设备通过信令直接配置和/或指示，也可以由网络设备通过其他参数配置，该其他参数例如是小区中的SSB索引数量，也可以是默认值或固定值，还可以是终端设备根据默认规则确定的值。
例如，L为能够映射所有SSB indexes且能够组成一个SSB-to-RO group mapping pattern最小的RO group association period个数。再例如，L为能够映射所有SSB indexes的最小的RO group association period个数。
在一些实施例中，第一周期中的PRACH机会(RO)或PRACH机会组(RO group)形成重复的图样(pattern)。例如，对于N1个第一周期，在任意一个第一周期和另一个第一周期中的RO groups的时频资源位置相同，这样的RO groups形成重复的图样；本申请不限于此。
以下以第一周期为PRACH机会组(RO group)关联图样周期(RGAPP)，第二周期为PRACH机会组(RO group)关联周期(RGAP)为例进行说明，本申请不限于此，例如第一周期和第二周期还可以使用其他称谓。所述PRACH机会组(RO group)关联周期至少根据PRACH配置周期(configuration period)被确定。
以下先对在PRACH机会组(RO group)关联周期中至少有一个PRACH机会组(RO group)的情况进行说明。“至少有一个RO组”也可以等价于“至少有组成RO group的第二数量的RO”。
在一些实施例中，所述第四数量为映射所述第三数量的同步信号块(SSB)索引且形成SSB到PRACH机会组(RO group)映射图样的PRACH机会组(RO group)关联周期的最小数目。
在一些实施例中，对于重复数目为第二数量的PRACH发送，所述PRACH机会 组(RO group)关联周期内至少有一个PRACH机会组(RO group)。
例如，RO group association period从系统帧0开始，对于number of multiple PRACH transmission为N的PRACH transmission，RO group association period根据configuration period确定，并且在一个association period内能够确定至少一个RO group。
在一些实施例中，所述PRACH机会组(RO group)关联周期中包括所述PRACH配置周期(configuration period)的数目为候选值集合中的值，且所述数目为候选值集合中保证在所述PRACH机会组(RO group)关联周期中至少确定一个PRACH机会组(RO group)的最小值。
在一些实施例中，所述PRACH机会组(RO group)关联周期中包括所述PRACH配置周期(configuration period)的数目为预定义值，或者为由网络设备配置/指示的值。
例如，RO group association period根据PRACH configuration period确定，包括但不限于以下方式：
-RO group association period中包含configuration period个数在候选值集合中，且能保证在RO group association period内至少能确定一个RO group；
-RO group association period中包含configuration period的个数为预定义值或者是由默认规则确定，例如RO group association period中包含configuration period的个数为N(number of multiple PRACH transmissions的值)，或者RO group association period中包含configuration period的个数为使RO group association period内至少包含一个RO group的最小值；
-RO group association period中包含configuration period的个数为gNB配置的值。
在一些实施例中，在所述PRACH机会组(RO group)关联周期内，对于整数个PRACH机会组(RO group)之外的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，在RO group association period内，确定整数个RO groups后余下的RO(s)集合如果没有组成RO groups或者没有在RO group内，则该集合内的RO(s)不映射SSB index或者不在该RO上发送PRACH transmissions。
上述“之外的RO”例如是不能组成一个repetition number为N的RO group的RO。例如，N个RO可以形成一个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。
以下通过示例对如何确定RO group association period进行说明。
图3是本申请实施例的时间周期的一示例图。如图3所示，根据高层配置的PRACH configuration，PRACH configuration period为10ms，每个子帧中都有一个PRACH时隙(slot)，且每个PRACH slot中有一个PRACH occasion，则每个系统帧里有10个RO。
如果SSB周期为40ms，且上下行周期不与RO所在时域位置冲突，则编号为0～15的160ms无线帧内的RO如图3所示。例如，包含SSB的PRACH configuration period内RO数为0，由于SSB的周期为40ms，编号为0,4,8,12的无线帧内有SSB burst，所以这些帧内有0个RO。
根据以上配置，以下举例说明确定RGAP的不同实施方式。
例如，RO group association period中包含configuration period个数为候选值集合中，且能保证在RO group association period内至少能确定一个RO group。例如，RO group association period与PRACH configuration period之间的映射关系如下表1所示，
表1.RGAP与PRACH configuration period之间的映射
通过上表1，PRACH configuration period为10ms时RGAP的取值可以是{1,2,4,8,16}个PRACH configuration period，并且RGAP的实际取值是RGAP中的ROs至少能保证组成一个RO group的候选值集合中的最小值。
图4是本申请实施例的时间周期的另一示例图。如图4所示，若该PRACH configuration用于repetition number为8的multiple PRACH transmission，可以确定RO group association period后的valid ROs pattern。RGAP 0,3,6,9最少包含2个PRACH configuration period才保证组成一个RO group，其余的RGAP最少包含1个PRACH configuration period才能保证组成一个RO group。
在RO group association period内，确定整数个RO groups后余下的RO(s)集合如果没有组成RO groups或者没有在RO group内，则该集合内的RO(s)不映射SSB index或者不在该RO上发送PRACH transmissions。由此，图4中每个RGAP中形成一个RO group之后余下的2个ROs无法组成一个RO group，则不再映射SSB index或者不用于PRACH transmissions，因此一个RGAP中组成RO group的RO数为8。
再例如，RO group association period中包含configuration period的个数为预定义的值，例如为8(能够配置的最大的repetition number的值)。
图5是本申请实施例的时间周期的另一示例图。如图5所示，例如若该PRACH configuration用于repetition number为8的multiple PRACH transmission，则RGAP由8个PRACH configuration period组成。
在RO group association period内，确定整数个RO groups后余下的RO(s)集合如果没有组成RO groups或者没有在RO group内，则该集合内的RO(s)不映射SSB index或者不在该RO上发送PRACH transmissions。由此，图5中每个RGAP中形成一个RO group之后余下的4个ROs无法组成一个RO group，则不再映射SSB index或者不用于PRACH transmissions，因此一个RGAP中在RO group内的RO数为56(7*8)，形成整数个(7个)RO group。
再例如，RO group association period中包含configuration period的个数为gNB配置的数。例如RO group association period中包含configuration period的个数由gNB直接配置，或者gNB从候选值集合中配置。
图6是本申请实施例的时间周期的另一示例图。如图6所示，例如该PRACH configuration用于repetition number为4的multiple PRACH transmission，gNB直接配置RGAP中包含PRACH configuration periods的个数为2。
在RO group association period内，确定整数个RO groups后余下的RO(s)集合如果没有组成RO groups或者没有在RO group内，则该集合内的RO(s)不映射SSB index 或者不在该RO上发送PRACH transmissions。由此，图6中RGAP 0,2,4,6中的8个ROs形成2个RO groups之后，余下的2个ROs无法再组成一个RO group，则drop掉这2个RO。RGAP 1,3,5,7中的valid ROs数为20，这些RO都能组成RO groups，则没有drop掉ROs。
再例如，RO group association period中包含configuration period的个数通过gNB配置的其他参数可以得到，例如等于gNB配置的repetition number。其中，配置的repetition number可能是对于某个PRACH configuration或者feature combination中配置的multiple PRACH transmissions的repetition number，也有可能是配置的不同repetition number的multiple PRACH transmission的最大的repetition number，具体还可以参考后面的实施例。
图7是本申请实施例的时间周期的另一示例图。如图7所示，例如若该PRACH configuration用于repetition number为4的multiple PRACH transmission，则RGAP由4个PRACH configuration period组成。
在RO group association period内，确定整数个RO groups后余下的RO(s)集合如果没有组成RO groups或者没有在RO group内，则该集合内的RO(s)不映射SSB index或者不在该RO上发送PRACH transmissions。由此，图7中每个RGAP中形成一个RO group之后余下的2个ROs无法组成一个RO group，则不再映射SSB index或者不用于PRACH transmissions，因此一个RGAP中在RO group内的RO数为28(7*4)，形成整数个(7个)RO group。
以下再说明确定PRACH机会组(RO group)关联图样周期(GRAPP)的情况。
例如，一个RO group association pattern period包含L个RO group association periods，L≥1且为整数。在RO group association pattern period中的RO groups至少能映射完一遍所有SSB index，并且RO group association pattern period内的ROs/RO groups能够确定一个可重复的SSB-to-RO group的pattern。
以下以前述的RGAP为例示例性进行说明。对于gNB配置的L值能够保证RGAPP为至少映射完一遍所有SSB index，并且RO group association pattern period内的ROs/RO groups能够确定一个可重复的SSB-to-RO group的pattern。
图8是本申请实施例的时间周期的另一示例图。如图8所示，若SSB index数为8，则一个RO group association pattern period至少需要8个group。对于图4中的例子， 该PRACH configuration用于repetition number为8的multiple PRACH transmission，RGAP 0～7可以映射完8个SSB index，但是不能形成一个SSB-to-RO group mapping cycle的pattern。但是，如图8所示，RGAP 0～8可以形成一个可以重复的pattern，所以RGAPP包含9个RGAP。
在一些实施例中，在所述PRACH机会组(RO group)关联图样周期(GRAPP)内，对于SSB索引到PRACH机会组(RO group)的整数个映射循环之外的一个或多个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，如图8所示，RGAP 0～7映射完一遍SSB index之后，只剩下一个RO group在RGAP 8中不能映射完一遍SSB index，则RGAP 8中的RO group不用于映射SSB index或者不用于PRACH transmissions。
在一些实施例中，在所述PRACH机会组(RO group)关联图样周期(GRAPP)内，对于SSB索引到PRACH机会组(RO group)的整数个映射循环之外的PRACH机会(RO)，在所述PRACH机会(RO)上映射第五数量的SSB索引，所述第五数量小于所述第三数量，所述第五数量为大于或等于1的整数。
例如，所述第五数量的SSB索引为所述第三数量的SSB索引中的前M个SSB索引，或者，为所述第三数量的SSB索引中的后M个SSB索引，或者，为所述第三数量的SSB索引中的随机M个SSB索引，M为大于或等于1的整数。
图9是本申请实施例的时间周期的另一示例图。如图9所示，RGAP 8中的RO group用于映射SSB index中的某一个SSB index(用SSB#N表示)。
图10是本申请实施例的时间周期的另一示例图。对于图5中的例子，该PRACH configuration用于repetition number为8的multiple PRACH transmission，RGAP 0可以映射完7个SSB index，没有映射完所有SSB且不能形成一个SSB-to-RO group mapping cycle的pattern。但是，如图10所示，RGAP 0～1可以形成一个可以重复的pattern。所以RGAPP包含2个RGAP。
如图10所示，RGAP 0映射完7个SSB 0～6，RGAP 1映射了SSB 7之后，RGAP1中余下的RO group不能映射完一遍所有的SSB index，则RGAP 1中余下的RO group不用于映射SSB index或者不用于PRACH transmissions。
图11是本申请实施例的时间周期的另一示例图。如图11所示，RGAP 1中余下 的RO group可以用于映射SSB index中的某6个SSB index。
图12是本申请实施例的时间周期的另一示例图。对于图6中的例子，该PRACH configuration用于repetition number为4的multiple PRACH transmission，RGAP 0～2可以映射完8个SSB index，3个RGAP不能形成一个SSB-to-RO group mapping cycle的pattern。但是，如图12所示，RGAP 0～3共4个RGAP可以形成一个可以重复的pattern。所以RGAPP包含4个RGAP。
如图12所示，RGAP 0～1映射完7个SSB 0～6，RGAP 2映射了SSB 7之后，RGAP 2中余下的4个RO以及RGAP 3中的ROs不能映射完一遍所有的SSB index，则RGAP 2～3中余下的ROs不用于映射SSB index或者不用于PRACH transmissions。
图13是本申请实施例的时间周期的另一示例图。如图13所示，RGAP 2～3中余下的RO groups可以用于映射SSB index中的某6个SSB index。
图14是本申请实施例的时间周期的另一示例图。对于图7中的例子，该PRACH configuration用于repetition number为4的multiple PRACH transmission，RGAP 0可以映射7个SSB 0～6，RGAP 1中的4个RO映射SSB 7则能够完全映射一遍SSB indexes，且RGAP 0～1能形成一个SSB-to-RO group mapping cycle的pattern。所以RGAPP包含2个RGAP。
如图14所示，RGAP 0映射完7个SSB 0～6，RGAP 1映射了SSB 7之后，RGAP 1中余下的24个ROs不能映射完一遍所有的SSB index，则RGAP 1中余下的ROs不用于映射SSB index或者不用于PRACH transmissions。
图15是本申请实施例的时间周期的另一示例图。如图15所示，RGAP 1中余下的RO groups可以用于映射SSB index中的某6个SSB index。
在一些实施例中，所述第一周期至少根据PRACH配置周期(configuration period)和SSB突发(SSB burst)周期的最小公倍数的倍数被确定，所述倍数为大于或等于1的整数。
例如，PRACH configuration period为P1，SSB burst周期为P2，P为P1与P2的最小公倍数。RGAPP＝L*P。例如，L为gNB直接配置，或者gNB配置候选值集合中的最小值；再例如，L为候选值中的最小值；又例如，L为能形成SSB-to-RO group mapping pattern的最小值。
以下仍以图4为例，对确定RO group association pattern period的方式进行举例。 即PRACH configuration用于repetition number为8的multiple PRACH transmission，且SSB burst周期为40ms，PRACH configuration period为10ms，确定RO group association period后的valid ROs pattern如图4所示。
例如，一个“RO group association pattern period”包含L个“RO group association period(RGAP)”，L≥1且为整数。RGAPP为至少映射完一遍所有SSB index且为PRACH configuration period和SSB burst周期的最小公倍数的倍数。并且RO group association pattern period内的ROs/RO groups能够确定一个可重复的SSB-to-RO group的pattern。
图16是本申请实施例的时间周期的另一示例图。L为gNB直接配置的值，或者gNB配置候选值集合中的值。若SSB index个数为8。对于图4中的RGAP示例，SSB burst周期为40ms，PRACH configuration period为10ms，二者最小公倍数为40ms，则RGAPP需要是40ms的倍数，且能形成一个SSB-to-RO group mapping cycle的pattern。如图16所示，gNB直接配置L为9，能满足RGAPP为一个SSB-to-RO group mapping pattern且是40ms的倍数。
如图16所示，RGAP 0～7映射完一遍SSB index之后，只剩下一个RO group在RGAP 8中不能映射完一遍SSB index，则RGAP 8中的RO group不用于映射SSB index或者不用于PRACH transmissions。
图17是本申请实施例的时间周期的另一示例图。如图17所示，RGAP 8中的RO group也可以用于映射SSB index中的某一个SSB index。
再例如，L为能形成SSB-to-RO group mapping pattern的最小值。若SSB index个数为8。对于图4中的RGAP示例，SSB burst周期为40ms，PRACH configuration period为10ms，二者最小公倍数为40ms，则RGAPP需要是40ms的倍数，且能形成一个SSB-to-RO group mapping cycle的pattern。则L最小为9，能满足RGAPP为一个SSB-to-RO group mapping pattern且是40ms的倍数。
仍以图16和17为例，如图16所示，RGAP 0～7映射完一遍SSB index之后，只剩下一个RO group在RGAP 8中不能映射完一遍SSB index，则RGAP 8中的RO group不用于映射SSB index或者不用于PRACH transmissions。如图17所示，RGAP 8中的RO group也可以用于映射SSB index中的某一个SSB index。
在一些实施例中，所述第一周期至少根据PRACH配置周期(configuration period) 和SSB突发(SSB burst)周期中的最大值的倍数被确定，所述倍数为大于或等于1的整数。
例如，PRACH configuration period为P1，SSB burst周期为P2，P＝max{P1,P2}。RGAPP＝L*P。例如，L为gNB直接配置，或者gNB配置候选值集合中的值；再例如，L为候选值中的最小值；又例如，L为能形成SSB-to-RO group mapping pattern的最小值。
例如，一个“RO group association pattern period”包含L个“RO group association period(RGAP)”，L≥1且为整数。RGAPP为至少映射完一遍所有SSB index且为PRACH configuration period和SSB burst周期中的最大值的倍数。并且RO group association pattern period内的ROs/RO groups能够确定一个可重复的SSB-to-RO group的pattern。
图18是本申请实施例的时间周期的另一示例图。L为gNB直接配置的值，或者gNB配置候选值集合中的值。若SSB index个数为4。对于图4中的RGAP示例，SSB burst周期为40ms，PRACH configuration period为10ms，二者中最大值为40ms，则RGAPP需要是40ms的倍数，且能形成一个SSB-to-RO group mapping cycle的pattern。如图18所示，gNB可以直接配置L为6，能满足RGAPP为一个SSB-to-RO group mapping pattern且是40ms的倍数。
如图18所示，RGAP 0～3映射完一遍SSB index之后，RGAP 4～5中16个的ROs不能映射完一遍所有SSB index，则RGAP 4～5中16个的ROs不用于映射SSB index或者不用于PRACH transmissions。
图19是本申请实施例的时间周期的另一示例图。如图19所示，RGAP 4～5中的16个ROs也可以用于映射SSB index中的某2个SSB index。
再例如，L为能形成SSB-to-RO group mapping pattern的最小值。若SSB index个数为4。对于图4中的RGAP示例，SSB burst周期为40ms，PRACH configuration period为10ms，二者中最大的为40ms，则RGAPP需要是40ms的倍数，且能形成一个SSB-to-RO group mapping cycle的pattern。则L最小为6，能满足RGAPP为一个SSB-to-RO group mapping pattern且是40ms的倍数。
仍以如18和图19为例，如图18所示，RGAP 0～3映射完一遍SSB index之后，RGAP 4～5中16个的ROs不能映射完一遍所有SSB index，则RGAP 4～5中16个的 ROs不用于映射SSB index或者不用于PRACH transmissions。如图19所示，RGAP 4～5中的16个ROs也可以用于映射SSB index中的某2个SSB index。
在一些实施例中，所述第一周期至少根据预定值(160ms)的倍数被确定，所述倍数为大于或等于1的整数。
例如，RO group association pattern period”是160ms的L倍。例如，L为gNB直接配置，或者gNB配置候选值集合中的值；再例如，L为候选值中的最小值；又例如，L为能形成SSB-to-RO group mapping pattern的最小值。
例如，一个“RO group association pattern period”包含L个“RO group association period(RGAP)”，L≥1且为整数。RGAPP为至少映射完一遍所有SSB index且为160ms的倍数。并且RO group association pattern period内的ROs/RO groups能够确定一个可重复的SSB-to-RO group的pattern。
图20是本申请实施例的时间周期的另一示例图。例如，L为gNB直接配置的值，或者gNB配置候选值集合中的值。若SSB index个数为8。对于图4中的RGAP示例，RGAPP需要是160ms的倍数，且能形成一个SSB-to-RO group mapping cycle的pattern。gNB直接配置L为12，能满足RGAPP为一个SSB-to-RO group mapping pattern且是160ms。
如图20所示，RGAP 0～7映射完一遍SSB index之后，RGAP 8～11中ROs不能映射完一遍所有SSB index，则RGAP 8～11中的ROs不用于映射SSB index或者不用于PRACH transmissions。
图21是本申请实施例的时间周期的另一示例图。如图21所示，RGAP 8～11中的ROs也可以用于映射SSB index中的某4个SSB index。
图22是本申请实施例的时间周期的另一示例图。例如，L为能形成SSB-to-RO group mapping pattern的最小值。若SSB index个数为4。对于图4中的RGAP示例，RGAPP需要是160ms的倍数，且能形成一个SSB-to-RO group mapping cycle的pattern。如图22所示，L最小为12，能满足RGAPP为一个SSB-to-RO group mapping pattern且是160ms的。如图22所示，RGAP 0～11映射完3遍SSB index之后没有余下的RO。
以上以PRACH的配置为msg1-FDM为1的情况为例进行了说明，本申请不限于此。以下再对PRACH机会组(RO group)关联周期内第三数量的SSB索引被映射到PRACH机会组(RO group)上至少一次的情况进行说明。
在一些实施例中，所述第四数量为映射所述第三数量的SSB索引的PRACH机会组(RO group)关联周期的最小数目。
在一些实施例中，对于重复数目为第二数量的PRACH发送，所述PRACH机会组(RO group)关联周期内所述第三数量的SSB索引被映射到PRACH机会组(RO group)上至少一次。
例如，一个RO group association period从系统帧0开始，且根据PRACH configuration periods确定，从而所有SSB index至少映射到RO groups上一遍。
在一些实施例中，所述PRACH机会组(RO group)关联周期中包括所述PRACH配置周期(configuration period)的数目为候选值集合中的值，且所述数目为候选值集合中保证在所述PRACH机会组(RO group)关联周期中所述第三数量的SSB索引被映射到PRACH机会组(RO group)上至少一次的最小值。
在一些实施例中，所述PRACH机会组(RO group)关联周期中包括所述PRACH配置周期(configuration period)的数目为预定义值，或者为由网络设备配置/指示的值。
例如，RO group association period根据PRACH configuration period确定，包括但不限于以下方式：
-RO group association period中包含PRACH configuration period个数为候选值集合中的最小值，且能保证在RO group association period内至少所有SSB indexes能映射到RO groups上一遍；
-RO group association period中包含configuration period的个数为预定义的值，或者默认规则确定的值，例如RO group association period中包含configuration period的个数为8或其他数值(一个正整数)的默认值，或者RO group association period中包含configuration period的个数为能保证RO group association period内至少所有SSB indexes能映射到RO groups的最小值；
-RO group association period中包含configuration period的个数为gNB配置的值。
在一些实施例中，在所述PRACH机会组(RO group)关联周期内，对于SSB索引到PRACH机会组(RO group)的整数个映射循环之外的一个或多个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，如果在RO group association period中整数个SSB index与RO groups映射循环之后，余下的ROs集合不能组成一个SSB index与RO groups映射循环，则该ROs集合不再映射SSB index，或者不用于PRACH transmissions。
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。
以下通过示例对如何确定RO group association period进行说明。
图23是本申请实施例的时间周期的另一示例图。如图23所示，根据高层配置的PRACH configuration，PRACH configuration period为10ms，偶数帧和奇数帧内分别包含8个和6个valid ROs。SSB周期为80ms，包含SSB的PRACH configuration period内RO数为0。如图23所示，编号为0,8的无线帧内有0个RO。图23示出了编号为0～15的160ms无线帧内的RO。
根据以上配置，以下举例说明确定RGAP的不同实施方式。
例如，RO group association period中包含PRACH configuration periods的个数为候选值集合中的最小值，且能保证在RO group association period内至少所有SSB indexes能映射到RO groups上一遍。例如，RO group association period与PRACH configuration period之间的映射关系如下表2所示，
表2.RGAP与PRACH configuration period之间的映射
通过上表2，PRACH configuration period为10ms时RGAP的取值可以是{1,2,4,8,16,32}个PRACH configuration period，并且RGAP的实际取值是RGAP内的RO groups能够映射一遍所有SSB index的候选值集合中的最小值。
图24是本申请实施例的时间周期的另一示例图。如图24所示，若该PRACH  configuration用于repetition number为8的multiple PRACH transmission，且SSB index数为8，可以确定RO group association period后的valid ROs pattern。系统帧0～10的ROs以及系统帧11中的2个ROs组成的8个RO groups可以映射完8个SSB index，RGAP需要是{1,2,4,8,16,32}个PRACH configuration period中的最小值，则RGAP为16个PRACH configuration periods。
在RO group association period中整数个SSB index与RO groups映射循环之后，余下的ROs集合不能组成一个SSB index与RO groups映射循环，则该ROs集合不再映射SSB index，或者不用于PRACH transmissions。由此，图24中的RGAP中确定了映射完所有SSB index的RO之后，系统帧11中余下的4个ROs以及系统帧12～15中的ROs无法组成一个RO group与SSB index映射循环，则这些ROs不再映射SSB index或者不用于PRACH transmissions。
图25是本申请实施例的时间周期的另一示例图。如图25所示，若该PRACH configuration用于repetition number为4的multiple PRACH transmission，且SSB index数为8，可以确定RO group association period后的valid ROs pattern。系统帧0～4的ROs以及系统帧5中的4个ROs组成的8个RO groups可以映射完8个SSB index，RGAP需要是{1,2,4,8,16,32}个PRACH configuration period中的最小值，则RGAP为8个PRACH configuration periods。
如果在RO group association period中整数个SSB index与RO groups映射循环之后，余下的ROs集合不能组成一个SSB index与RO groups映射循环，则该ROs集合不再映射SSB index，或者不用于PRACH transmissions。由此，图25中的RGAP 0中确定了映射完所有SSB index的RO之后，系统帧5中余下的2个ROs以及系统帧6～7中的ROs无法组成一个RO group与SSB index映射循环，则这些ROs不再映射SSB index或者不用于PRACH transmissions。
再例如，RO group association period中包含configuration period的个数为预定义的值，或者默认规则确定的值。例如，RO group association period中包含configuration period的个数为8或其他数值(一个正整数)的默认值，或者RO group association period中包含configuration period的个数为能保证RO group association period内至少所有SSB indexes能映射到RO groups的最小值。
图26是本申请实施例的时间周期的另一示例图。如图26所示，若该PRACH  configuration用于repetition number为8的multiple PRACH transmission，且SSB index个数为8，RGAP预定义为由16个PRACH configuration period组成。
如果在RO group association period中整数个SSB index与RO groups映射循环之后，余下的ROs集合不能组成一个SSB index与RO groups映射循环，则该ROs集合不再映射SSB index，或者不用于PRACH transmissions。由此，图26中的RGAP在确定了映射完所有SSB index的RO之后，系统帧11中余下的4个ROs以及系统帧12～15中的ROs无法组成一个RO group与SSB index映射循环，则这些ROs不再映射SSB index或者不用于PRACH transmissions。
图27是本申请实施例的时间周期的另一示例图。如图27所示，若该PRACH configuration用于repetition number为4的multiple PRACH transmission，且SSB index个数为8，RGAP中的PRACH configuration period的个数为能保证RO group association period内至少所有SSB indexes能映射到RO groups的最小值。如图27所示，RGAP 0,1内最少包含6个PRACH configuration period，可以保证所有SSB indexes能映射到RO groups上一遍。
如果在RO group association period中整数个SSB index与RO groups映射循环之后，余下的ROs集合不能组成一个SSB index与RO groups映射循环，则该ROs集合不再映射SSB index，或者不用于PRACH transmissions。由此，图27中的RGAP 0,1在确定了映射完所有SSB index的RO之后，系统帧5和11中余下的2个ROs无法组成一个RO group与SSB index映射循环，则这些ROs不再映射SSB index或者不用于PRACH transmissions。
又例如，RO group association period中包含configuration period的个数为gNB配置的数。例如，RO group association period中包含configuration period的个数由gNB直接配置，或者gNB从候选值集合中配置。
图28是本申请实施例的时间周期的另一示例图。如图28所示，例如该PRACH configuration用于repetition number为4的multiple PRACH transmission，gNB直接配置RGAP中包含PRACH configuration periods的个数为8。
如果在RO group association period中整数个SSB index与RO groups映射循环之后，余下的ROs集合不能组成一个SSB index与RO groups映射循环，则该ROs集合不再映射SSB index，或者不用于PRACH transmissions。由此，图28中的RGAP 0 中确定了映射完所有SSB index的RO之后，系统帧5中余下的2个ROs以及系统帧6～7中的ROs无法组成一个RO group与SSB index映射循环，则这些ROs不再映射SSB index或者不用于PRACH transmissions。
以下再说明确定PRACH机会组(RO group)关联图样周期(GRAPP)的情况。
例如，一个RO group association pattern period包含L个RO group association periods，L≥1且为整数。在RO group association pattern period中的RO groups至少能映射完一遍所有SSB index，并且RO group association pattern period内的ROs/RO groups能够确定一个可重复的SSB-to-RO group的pattern。
以下以图25中的RGAP为例。即该PRACH configuration用于repetition number为4的multiple PRACH transmission，且SSB index数为8，可以确定RO group association period后的valid ROs pattern。
图29是本申请实施例的时间周期的另一示例图。如图29所示，一个RGAPP中包含一个RGAP，则能够保证RO group association pattern period内的ROs/RO groups确定一个可重复的SSB-to-RO group的pattern。
在一些实施例中，“RO group association pattern period”可以根据PRACH configuration period和SSB burst周期的最小公倍数的倍数确定，或者，根据PRACH configuration period和SSB burst周期中的最大值的倍数确定，或者，根据160ms的倍数确定。
以图23的配置为例，PRACH configuration period为10ms，SSB burst周期为80ms，PRACH configuration period为10ms，偶数帧和奇数帧中的valid RO数分别为8和6，valid ROs pattern如图23所示。
例如，一个“RO group association pattern period”包含L个“RO group association period(RGAP)”，L≥1且为整数。RGAPP为至少映射完一遍所有SSB index且为PRACH configuration period和SSB burst周期的最小公倍数的倍数。并且RO group association pattern period内的ROs/RO groups能够确定一个可重复的SSB-to-RO group的pattern。
以L为gNB直接配置的值，或者gNB配置候选值集合中的值为例。该PRACH configuration用于repetition number为8的multiple PRACH transmission，且SSB index数为8。
图30是本申请实施例的时间周期的另一示例图。如图30所示，PRACH configuration period为10ms，SSB burst周期为80ms，二者最小公倍数为80ms，则RGAPP需要是80ms的倍数，且能形成一个SSB-to-RO group mapping cycle的pattern。gNB直接配置L为1，能满足RGAPP为一个SSB-to-RO group mapping pattern且是80ms的倍数。
以L为能形成SSB-to-RO group mapping pattern的最小值为例。若该PRACH configuration用于repetition number为4的multiple PRACH transmission，且SSB index数为8。
图31是本申请实施例的时间周期的另一示例图。如图31所示，SSB burst周期为80ms，PRACH configuration period为10ms，二者最小公倍数为80ms，则RGAPP需要是80ms的倍数，且能形成一个SSB-to-RO group mapping cycle的pattern。则L最小为1，能满足RGAPP为一个SSB-to-RO group mapping pattern且是80ms的倍数。
再例如，一个“RO group association pattern period”包含L个“RO group association period(RGAP)”，L≥1且为整数。RGAPP为至少映射完一遍所有SSB index且为PRACH configuration period和SSB burst周期中的最大值的倍数。并且RO group association pattern period内的ROs/RO groups能够确定一个可重复的SSB-to-RO group的pattern。
以L为gNB直接配置，或者gNB配置候选值集合中的值为例。若该PRACH configuration用于repetition number为8的multiple PRACH transmission，且SSB index数为8。
如图30所示，SSB burst周期为80ms，PRACH configuration period为10ms，二者中最大的为80ms，则RGAPP需要是80ms的倍数，且能形成一个SSB-to-RO group mapping cycle的pattern。gNB直接配置L为1，能满足RGAPP为一个SSB-to-RO group mapping pattern且是80ms的倍数。
以L为能形成SSB-to-RO group mapping pattern的最小值为例。若该PRACH configuration用于repetition number为8的multiple PRACH transmission，且SSB index数为8。
如图30所示，SSB burst周期为80ms，PRACH configuration period为10ms，二者中最大的为80ms，则RGAPP需要是80ms的倍数，且能形成一个SSB-to-RO group  mapping cycle的pattern。则L最小为1，能满足RGAPP为一个SSB-to-RO group mapping pattern且是80ms的倍数。
又例如，一个“RO group association pattern period”包含L个“RO group association period(RGAP)”，L≥1且为整数。RGAPP为至少映射完一遍所有SSB index且为160ms的倍数。并且RO group association pattern period内的ROs/RO groups能够确定一个可重复的SSB-to-RO group的pattern。
例如，L为gNB直接配置的值，或者gNB配置候选值集合中的值；再例如，L为能形成SSB-to-RO group mapping pattern的最小值。
以上以PRACH的配置为msg1-FDM为1的情况为例进行了说明，本申请不限于此。以下再对SSB-to-RO group映射进行说明。
在一些实施例中，SSB索引到PRACH机会组(RO group)的映射中，PRACH机会组(RO group)为时域资源相邻且频域资源相同的第二数量N个PRACH机会(RO)。
例如，RO group为时域上相近的N个RO，N为该PRACH configuration适用的multiple PRACH transmissions的repetition number。时域上相邻的N个RO例如是指：RO组中的N个RO是时域资源间隔最近的RO，或者，RO的时域资源索引是连续的。频域资源相同也可以是频域资源index相同。
在一些实施例中，SSB索引到PRACH机会组(RO group)的映射顺序包括：
在PRACH机会组(RO group)或PRACH机会(RO)内按照前导索引的递增顺序映射；
对于频域复用的PRACH机会组(RO group)或PRACH机会(RO)，按照频域资源索引的递增顺序映射；
对于时域复用的PRACH机会组(RO group)或PRACH机会(RO)，在PRACH时隙内按照时域资源索引的递增顺序映射；
对于PRACH时隙按照索引的递增顺序映射。
图32是本申请实施例的SSB-to-RO group映射的一示例图。如图32所示，对于repetition number为4的情况，SSB0映射到RO group 0，SSB1映射到RO group 1，……，SSB7映射到RO group 7。
图33是本申请实施例的SSB-to-RO group映射的一示例图。如图33所示，对于 repetition number为2的情况，SSB0映射到RO group 0，SSB1映射到RO group 1，……，SSB7映射到RO group 7。
以上图3至图31以msg1-FDM为1的情况为例进行了说明，示例性示出了频域上资源数量为1的情况，本申请不限于此。以下再示意性说明频域复用RO的情况。
图34是本申请实施例的时间周期的另一示例图。如图34所示，对于频域FDM的RO资源数量为4，即msg1-FDM＝4的情况。Repetition number为4的multiple PRACH transmissions，SSB index数量为8。
以RGAP为候选值集合中的最少的PRACH configuration periods为例。PRACH configuration periods为10ms，SSB burst周期为80ms。对于PRACH configuration period为10ms时RGAP可以包含{1,2,4,8,16}个PRACH configuration period。则对于repetition number为4的情况，组成的pattern如图34所示，160ms为一个association pattern period。
图35是本申请实施例的时间周期的另一示例图。如图35所示，对于频域FDM的RO资源数量为2，即msg1-FDM＝2的情况。Repetition number为4的multiple PRACH transmissions，SSB index数量为8。
以RGAP为候选值集合中的最少的PRACH configuration periods为例。PRACH configuration periods为10ms，SSB burst周期为80ms。对于PRACH configuration period为10ms，RGAP可以包含{1,2,4,8,16}个PRACH configuration period。则对于repetition number为4的情况，组成的pattern如图35所示。
如图35所示，160ms可以组成一个RGAPP，其中后两个RGAP的ROs无法再组成一个SSB-to-RO group mapping cycle，则不再用于PRACH transmission。
图36是本申请实施例的时间周期的另一示例图。如图36所示，后两个RGAP的ROs无法再组成一个SSB-to-RO group mapping cycle，可以再映射4个SSB用于multiple PRACH transmission。
图37是本申请实施例的时间周期的另一示例图。如图37所示，对于频域FDM的RO资源数量为4，即msg1-FDM＝4的情况。Repetition number为2的multiple PRACH transmissions，SSB index数量为8。
以RGAP为候选值集合中的最少的PRACH configuration periods为例。PRACH configuration periods为10ms，SSB burst周期为80ms。对于PRACH configuration period 为10ms，RGAP可以包含{1,2,4,8,16}个PRACH configuration period。则对于repetition number为2的情况，组成的pattern如图37所示。
图38是本申请实施例的时间周期的另一示例图。如图38所示，对于频域FDM的RO资源数量为4，即msg1-FDM＝4的情况。Repetition number为4的multiple PRACH transmissions，SSB index数量为8。
以RGAP为候选值集合中的最少的PRACH configuration periods为例。PRACH configuration periods为10ms，SSB burst周期为80ms。对于PRACH configuration period为10ms，RGAP可以包含{1,2,4,8,16}个PRACH configuration period。则对于repetition number为4的情况，组成的pattern如图38所示。
以下再对本申请实施例的PRACH资源配置进行说明，可以根据这些配置确定出时间周期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，根据所述所有PRACH配置中PRACH发送的重复数目的最大值确定所述时间周期；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不同重复数目的多个PRACH发送，根据所述所有特征合并对应的不同重复数目的最大值确定所述时间周期；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不同重复数目的多个PRACH发送，根据所述一个特征合并对应的不同重复数目的最大值确定所述时间周期；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一个PRACH发送，根据所述一个特征对应的不同重复数目的最大值确定所述时间周期。
图39是本申请实施例的PRACH配置的一示例图。如图39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。
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，从而不仅提高了系统的覆盖能力，而且还能提升RO资源的利用率。
此外，对于不同的multiple PRACH transmissions配置，可以采用不同的SSB与RO group映射样式重复周期的确定方式，也可以采用相同的SSB与RO group映射样式重复周期的确定方式。
对于资源有限的场景，通过RO group确定RO group association period，能够尽可能的利用multiple PRACH transmissions的RO资源，从而提高了PRACH transmission的资源利用率。通过SSB-to-RO group mapping确定RO group association period，能够减少标准化工作量。
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，所述时间周期包括第一数量的第一周期，所述第一周期中的PRACH机会组(RO group)至少映射第三数量的同步信号块(SSB)索引，并且所述第一周期中的PRACH机会(RO)或PRACH机会组(RO group)形成重复的图样(pattern)。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，不仅提高了系统的覆盖能力，而且还能提升RO资源的利用率。
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40是本申请实施例的PRACH接收方法的一示意图，如图40所示，该方法包括：
4002，网络设备接收终端设备在第二数量的RO上重复发送前导(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PRACH机会(RO)；其中所述时间周期包括第一数量的第一周期，所述第一周期中的PRACH机会组(RO group)至少映射第三数量的同步信号块(SSB)索引，并且所述第一周期中的PRACH机会(RO)或PRACH机会组(RO group)形成重复的图样(pattern)。
在一些实施例中，如图40所示，该方法还可以包括：
4001，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40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40的记载。
在一些实施例中，所述第一周期为PRACH机会组(RO group)关联图样周期(GRAPP)，所述第二数量为所述PRACH发送的重复数目(repetition number)，所述第二数量为大于1的整数；所述第三数量为由网络设备配置和/或指示的值，所述第三数量为大于或等于1的整数。
在一些实施例中，所述PRACH机会组(RO group)关联图样周期包括第四数量的第二周期，所述第四数量为大于或等于1的整数；
所述第四数量为由网络设备配置和/或指示的值，或者，所述第四数量为默认值或固定值，或者，所述第四数量为由所述终端设备确定的值。
在一些实施例中，所述第二周期为PRACH机会组(RO group)关联周期(RGAP)，所述PRACH机会组(RO group)关联周期至少根据PRACH配置周期(configuration period)被确定。
在一些实施例中，所述第四数量为映射所述第三数量的同步信号块(SSB)索引且形成SSB到PRACH机会组(RO group)映射图样的PRACH机会组(RO group)关联周期的最小数目。
在一些实施例中，对于重复数目为第二数量的PRACH发送，所述PRACH机会组(RO group)关联周期内至少有一个PRACH机会组(RO group)。
在一些实施例中，在所述PRACH机会组(RO group)关联周期内，对于整数个PRACH机会组(RO group)之外的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)。
在一些实施例中，所述PRACH机会组(RO group)关联周期中包括所述PRACH配置周期(configuration period)的数目为候选值集合中的值，且所述数目为候选值集合中保证在所述PRACH机会组(RO group)关联周期中至少确定一个PRACH机会组(RO group)的最小值。
在一些实施例中，所述PRACH机会组(RO group)关联周期中包括所述PRACH配置周期(configuration period)的数目为预定义值，或者为由网络设备配置/指示的值。
在一些实施例中，所述第四数量为映射所述第三数量的SSB索引的PRACH机会组(RO group)关联周期的最小数目。
在一些实施例中，对于重复数目为第二数量的PRACH发送，所述PRACH机会组(RO group)关联周期内所述第三数量的SSB索引被映射到PRACH机会组(RO group)上至少一次。
在一些实施例中，在所述PRACH机会组(RO group)关联周期内，对于SSB索引到PRACH机会组(RO group)的整数个映射循环之外的一个或多个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)。
在一些实施例中，所述PRACH机会组(RO group)关联周期中包括所述PRACH 配置周期(configuration period)的数目为候选值集合中的值，且所述数目为候选值集合中保证在所述PRACH机会组(RO group)关联周期中所述第三数量的SSB索引被映射到PRACH机会组(RO group)上至少一次的最小值。
在一些实施例中，所述PRACH机会组(RO group)关联周期中包括所述PRACH配置周期(configuration period)的数目为预定义值，或者为由网络设备配置/指示的值。
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，根据所述所有PRACH配置中PRACH发送的重复数目的最大值确定所述时间周期；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不同重复数目的多个PRACH发送，根据所述所有特征合并对应的不同重复数目的最大值确定所述时间周期；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不同重复数目的多个PRACH发送，根据所述一个特征合并对应的不同重复数目的最大值确定所述时间周期；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一个PRACH发送，根据所述一个特征对应的不同重复数目的最大值确定所述时间周期。
在一些实施例中，所述第一周期至少根据PRACH配置周期(configuration period)和SSB突发(SSB burst)周期的最小公倍数的倍数被确定，所述倍数为大于或等于1的整数。
在一些实施例中，所述第一周期至少根据PRACH配置周期(configuration period)和SSB突发(SSB burst)周期中的最大值的倍数被确定，所述倍数为大于或等于1的整数。
在一些实施例中，所述第一周期至少根据预定值(160ms)的倍数被确定，所述倍数为大于或等于1的整数。
在一些实施例中，所述第一数量为由网络设备配置和/或指示的值，或者，所述第一数量为默认值或固定值，或者，所述第一数量为由所述终端设备确定的值，所述第一数量为大于或等于1的整数。
在一些实施例中，所述时间周期的最大值为T1，和/或，所述第一周期的最大值为T2。
在一些实施例中，在所述PRACH机会组(RO group)关联图样周期(GRAPP)内，对于SSB索引到PRACH机会组(RO group)的整数个映射循环之外的一个或多个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，在所述PRACH机会组(RO group)关联图样周期(GRAPP)内，对于SSB索引到PRACH机会组(RO group)的整数个映射循环之外的PRACH机会(RO)，在所述PRACH机会(RO)上映射第五数量的SSB索引，所述第五数量小于所述第三数量，所述第五数量为大于或等于1的整数。
在一些实施例中，所述第五数量的SSB索引为所述第三数量的SSB索引中的前M个SSB索引，或者，为所述第三数量的SSB索引中的后M个SSB索引，或者，为所述第三数量的SSB索引中的随机M个SSB索引，M为大于或等于1的整数。
在一些实施例中，SSB索引到PRACH机会组(RO group)的映射中，PRACH机会组(RO group)为时域资源相邻且频域资源相同的第二数量N个PRACH机会(RO)。
在一些实施例中，SSB索引到PRACH机会组(RO group)的映射顺序包括：
在PRACH机会组(RO group)或PRACH机会(RO)内按照前导索引的递增顺序映射；
对于频域复用的PRACH机会组(RO group)或PRACH机会(RO)，按照频域资源索引的递增顺序映射；
对于时域复用的PRACH机会组(RO group)或PRACH机会(RO)，在PRACH时隙内按照时域资源索引的递增顺序映射；
对于PRACH时隙按照索引的递增顺序映射。
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，所述时间周期包括第一数量的第一周期，所述第一周期中的PRACH机会组(RO group)至少 映射第三数量的同步信号块(SSB)索引，并且所述第一周期中的PRACH机会(RO)或PRACH机会组(RO group)形成重复的图样(pattern)。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，不仅提高了系统的覆盖能力，而且还能提升RO资源的利用率。
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41是本申请实施例的PRACH发送装置的一示意图。如图41所示，PRACH发送装置4100包括：
处理单元4101，其确定第二数量的与时间周期相关的PRACH机会(RO)；其中所述时间周期包括第一数量的第一周期，所述第一周期中的PRACH机会组(RO group)至少映射第三数量的同步信号块(SSB)索引，并且所述第一周期中的PRACH机会(RO)或PRACH机会组(RO group)形成重复的图样(pattern)；
发送单元4102，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，如图41所示，PRACH发送装置4100还可以包括：
接收单元4103，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4100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41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，所述时间周期包括第一数量的第一周期，所述第一周期中的PRACH机会组(RO group)至少映射第三数量的同步信号块(SSB)索引，并且所述第一周期中的PRACH机会(RO)或PRACH机会组(RO group)形成重复的图样(pattern)。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，不仅提高了系统的覆盖能力，而且还能提升RO资源的利用率。
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42是本申请实施例的PRACH接收装置的一示意图。如图42所示，PRACH接收装置4200包括：
接收单元4201，其接收终端设备在第二数量的RO上重复发送前导(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PRACH机会(RO)；其中所述时间周期包括第一数量的第一周期，所述第一周期中的PRACH机会组(RO group)至少映射第三数量的同步信号块(SSB)索引，并且所述第一周期中的PRACH机会(RO)或PRACH机会组(RO group)形成重复的图样(pattern)。
在一些实施例中，如图42所示，PRACH接收装置4200还可以包括：
发送单元4202，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4200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42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，所述时间周期包括第一数量的第一周期，所述第一周期中的PRACH机会组(RO group)至少映射第三数量的同步信号块(SSB)索引，并且所述第一周期中的PRACH机会(RO)或PRACH机会组(RO group)形成重复的图样(pattern)。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，不仅提高了系统的覆盖能力，而且还能提升RO资源的利用率。
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，其确定所述第二数量的与时间周期相关的PRACH机会(RO)；其中所述时间周期包括第一数量的第一周期，所述第一周期中的PRACH机会组(RO group)至少映射第三数量的同步信号块(SSB)索引，并且所述第一周期中的PRACH机会(RO)或PRACH机会组(RO group)形成重复的图样(pattern)；
网络设备，其接收所述终端设备在第二数量的RO上重复发送的前导(preamble)。
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43是本申请实施例的网络设备的构成示意图。如图43所示，网络设备4300可以包括：处理器4310(例如中央处理器CPU)和存储器4320；存储器4320耦合到处理器4310。其中该存储器4320可存储各种数据；此外还存储信息处理的程序4330，并且在处理器4310的控制下执行该程序4330。
例如，处理器4310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4310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PRACH机会(RO)；其中所述时间周期包括第一数量的第一周期，所述第一周期中的PRACH机会组(RO group)至少映射第三数量的同步信号块(SSB)索引，并且所述第一周期中的PRACH机会(RO)或PRACH机会组(RO group)形成重复的图样(pattern)。
此外，如图43所示，网络设备4300还可以包括：收发机4340和天线4350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4300也并不是必须要包括图43中所示的所有部件；此外，网络设备4300还可以包括图43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44是本申请实施例的终端设备的示意图。如图44所示，该终端设备4400可 以包括处理器4410和存储器4420；存储器4420存储有数据和程序，并耦合到处理器4410。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4410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4410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PRACH机会(RO)；其中所述时间周期包括第一数量的第一周期，所述第一周期中的PRACH机会组(RO group)至少映射第三数量的同步信号块(SSB)索引，并且所述第一周期中的PRACH机会(RO)或PRACH机会组(RO group)形成重复的图样(pattern)；在所述第二数量的RO上重复发送前导(preamble)。
如图44所示，该终端设备4400还可以包括：通信模块4430、输入单元4440、显示器4450、电源4460。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4400也并不是必须要包括图44中所示的所有部件，上述部件并不是必需的；此外，终端设备4400还可以包括图44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PRACH机会(RO)；其中所述时间周期包括第一数量的第一周期，所述第一周期中的PRACH机会组(RO group)至少映射第三数量的同步信号块(SSB)索引，并且所述第一周期中的PRACH机会(RO)或PRACH机会组(RO group)形成重复的图样(pattern)；
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，所述第一周期为PRACH机会组(RO group) 关联图样周期(GRAPP)，所述第二数量为所述PRACH发送的重复数目(repetition number)，所述第二数量为大于1的整数；所述第三数量为由网络设备配置和/或指示的值，所述第三数量为大于或等于1的整数。
3.根据附记2所述的方法，其中，所述PRACH机会组(RO group)关联图样周期包括第四数量的第二周期，所述第四数量为大于或等于1的整数；
所述第四数量为由网络设备配置和/或指示的值，或者，所述第四数量为默认值或固定值，或者，所述第四数量为由所述终端设备确定的值。
4.根据附记3所述的方法，其中，所述第二周期为PRACH机会组(RO group)关联周期(RGAP)，所述PRACH机会组(RO group)关联周期至少根据PRACH配置周期(configuration period)被确定。
5.根据附记4所述的方法，其中，所述第四数量为映射所述第三数量的同步信号块(SSB)索引且形成SSB到PRACH机会组(RO group)映射图样的PRACH机会组(RO group)关联周期的最小数目。
6.根据附记4所述的方法，其中，对于重复数目为第二数量的PRACH发送，所述PRACH机会组(RO group)关联周期内至少有一个PRACH机会组(RO group)。
7.根据附记6所述的方法，其中，在所述PRACH机会组(RO group)关联周期内，对于整数个PRACH机会组(RO group)之外的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。
8.根据附记7所述的方法，其中，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)。
9.根据附记5至8任一项所述的方法，其中，所述PRACH机会组(RO group)关联周期中包括所述PRACH配置周期(configuration period)的数目为候选值集合中的值，且所述数目为候选值集合中保证在所述PRACH机会组(RO group)关联周期中至少确定一个PRACH机会组(RO group)的最小值。
10.根据附记5至8任一项所述的方法，其中，所述PRACH机会组(RO group)关联周期中包括所述PRACH配置周期(configuration period)的数目为预定义值，或者为由网络设备配置/指示的值。
11.根据附记4所述的方法，其中，所述第四数量为映射所述第三数量的SSB索 引的PRACH机会组(RO group)关联周期的最小数目。
12.根据附记4所述的方法，其中，对于重复数目为第二数量的PRACH发送，所述PRACH机会组(RO group)关联周期内所述第三数量的SSB索引被映射到PRACH机会组(RO group)上至少一次。
13.根据附记12所述的方法，其中，在所述PRACH机会组(RO group)关联周期内，对于SSB索引到PRACH机会组(RO group)的整数个映射循环之外的一个或多个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。
14.根据附记13所述的方法，其中，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)。
15.根据附记11至14任一项所述的方法，其中，所述PRACH机会组(RO group)关联周期中包括所述PRACH配置周期(configuration period)的数目为候选值集合中的值，且所述数目为候选值集合中保证在所述PRACH机会组(RO group)关联周期中所述第三数量的SSB索引被映射到PRACH机会组(RO group)上至少一次的最小值。
16.根据附记11至14任一项所述的方法，其中，所述PRACH机会组(RO group)关联周期中包括所述PRACH配置周期(configuration period)的数目为预定义值，或者为由网络设备配置/指示的值。
17.根据附记1至16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，根据所述所有PRACH配置中PRACH发送的重复数目的最大值确定所述时间周期；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不同重复数目的多个PRACH发送，根据所述所有特征合并对应的不同重复数目的最大值确定所述时间周期；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不同重复数目的多个PRACH发送，根据所述一个特征合并对应的不同重复数目的最大值确定所述时间周期；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一个PRACH发送，根据所述一个特征对应的不同重复数目的最大值确定所述时间周期。
18.根据附记1至17任一项所述的方法，其中，所述第一周期至少根据PRACH配置周期(configuration period)和SSB突发(SSB burst)周期的最小公倍数的倍数被确定，所述倍数为大于或等于1的整数。
19.根据附记1至17任一项所述的方法，其中，所述第一周期至少根据PRACH配置周期(configuration period)和SSB突发(SSB burst)周期中的最大值的倍数被确定，所述倍数为大于或等于1的整数。
20.根据附记1至17任一项所述的方法，其中，所述第一周期至少根据预定值(160ms)的倍数被确定，所述倍数为大于或等于1的整数。
21.根据附记1至20任一项所述的方法，其中，
所述第一数量为由网络设备配置和/或指示的值，或者，所述第一数量为默认值或固定值，或者，所述第一数量为由所述终端设备确定的值，所述第一数量为大于或等于1的整数。
22.根据附记1至21任一项所述的方法，其中，所述时间周期的最大值为T1，和/或，所述第一周期的最大值为T2。
23.根据附记3所述的方法，其中，在所述PRACH机会组(RO group)关联图样周期(GRAPP)内，对于SSB索引到PRACH机会组(RO group)的整数个映射循环之外的一个或多个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。
24.根据附记3所述的方法，其中，在所述PRACH机会组(RO group)关联图样周期(GRAPP)内，对于SSB索引到PRACH机会组(RO group)的整数个映射循环之外的PRACH机会(RO)，在所述PRACH机会(RO)上映射第五数量的SSB索引，所述第五数量小于所述第三数量，所述第五数量为大于或等于1的整数。
25.根据附记24所述的方法，其中，所述第五数量的SSB索引为所述第三数量的SSB索引中的前M个SSB索引，或者，为所述第三数量的SSB索引中的后M个SSB索引，或者，为所述第三数量的SSB索引中的随机M个SSB索引，M为大于或等于1的整数。
26.根据附记1至25任一项所述的方法，其中，SSB索引到PRACH机会组(RO  group)的映射中，PRACH机会组(RO group)为时域资源相邻且频域资源相同的第二数量N个PRACH机会(RO)。
27.根据附记26所述的方法，其中，SSB索引到PRACH机会组(RO group)的映射顺序包括：
在PRACH机会组(RO group)或PRACH机会(RO)内按照前导索引的递增顺序映射；
对于频域复用的PRACH机会组(RO group)或PRACH机会(RO)，按照频域资源索引的递增顺序映射；
对于时域复用的PRACH机会组(RO group)或PRACH机会(RO)，在PRACH时隙内按照时域资源索引的递增顺序映射；
对于PRACH时隙按照索引的递增顺序映射。
28.一种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PRACH机会(RO)；其中所述时间周期包括第一数量的第一周期，所述第一周期中的PRACH机会组(RO group)至少映射第三数量的同步信号块(SSB)索引，并且所述第一周期中的PRACH机会(RO)或PRACH机会组(RO group)形成重复的图样(pattern)。
29.根据附记28所述的方法，其中，所述第一周期为PRACH机会组(RO group)关联图样周期(GRAPP)，所述第二数量为所述PRACH发送的重复数目(repetition number)，所述第二数量为大于1的整数；所述第三数量为由网络设备配置和/或指示的值，所述第三数量为大于或等于1的整数。
30.根据附记29所述的方法，其中，所述PRACH机会组(RO group)关联图样周期包括第四数量的第二周期，所述第四数量为大于或等于1的整数；
所述第四数量为由网络设备配置和/或指示的值，或者，所述第四数量为默认值或固定值，或者，所述第四数量为由所述终端设备确定的值。
31.根据附记30所述的方法，其中，所述第二周期为PRACH机会组(RO group)关联周期(RGAP)，所述PRACH机会组(RO group)关联周期至少根据PRACH配置周期(configuration period)被确定。
32.根据附记31所述的方法，其中，所述第四数量为映射所述第三数量的同步 信号块(SSB)索引且形成SSB到PRACH机会组(RO group)映射图样的PRACH机会组(RO group)关联周期的最小数目。
33.根据附记31所述的方法，其中，对于重复数目为第二数量的PRACH发送，所述PRACH机会组(RO group)关联周期内至少有一个PRACH机会组(RO group)。
34.根据附记33所述的方法，其中，在所述PRACH机会组(RO group)关联周期内，对于整数个PRACH机会组(RO group)之外的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。
35.根据附记34所述的方法，其中，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)。
36.根据附记32至35任一项所述的方法，其中，所述PRACH机会组(RO group)关联周期中包括所述PRACH配置周期(configuration period)的数目为候选值集合中的值，且所述数目为候选值集合中保证在所述PRACH机会组(RO group)关联周期中至少确定一个PRACH机会组(RO group)的最小值。
37.根据附记32至35任一项所述的方法，其中，所述PRACH机会组(RO group)关联周期中包括所述PRACH配置周期(configuration period)的数目为预定义值，或者为由网络设备配置/指示的值。
38.根据附记31所述的方法，其中，所述第四数量为映射所述第三数量的SSB索引的PRACH机会组(RO group)关联周期的最小数目。
39.根据附记31所述的方法，其中，对于重复数目为第二数量的PRACH发送，所述PRACH机会组(RO group)关联周期内所述第三数量的SSB索引被映射到PRACH机会组(RO group)上至少一次。
40.根据附记39所述的方法，其中，在所述PRACH机会组(RO group)关联周期内，对于SSB索引到PRACH机会组(RO group)的整数个映射循环之外的一个或多个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。
41.根据附记40所述的方法，其中，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)。
42.根据附记38至41任一项所述的方法，其中，所述PRACH机会组(RO group) 关联周期中包括所述PRACH配置周期(configuration period)的数目为候选值集合中的值，且所述数目为候选值集合中保证在所述PRACH机会组(RO group)关联周期中所述第三数量的SSB索引被映射到PRACH机会组(RO group)上至少一次的最小值。
43.根据附记38至41任一项所述的方法，其中，所述PRACH机会组(RO group)关联周期中包括所述PRACH配置周期(configuration period)的数目为预定义值，或者为由网络设备配置/指示的值。
44.根据附记28至43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，根据所述所有PRACH配置中PRACH发送的重复数目的最大值确定所述时间周期；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不同重复数目的多个PRACH发送，根据所述所有特征合并对应的不同重复数目的最大值确定所述时间周期；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不同重复数目的多个PRACH发送，根据所述一个特征合并对应的不同重复数目的最大值确定所述时间周期；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一个PRACH发送，根据所述一个特征对应的不同重复数目的最大值确定所述时间周期。
45.根据附记28至44任一项所述的方法，其中，所述第一周期至少根据PRACH配置周期(configuration period)和SSB突发(SSB burst)周期的最小公倍数的倍数被确定，所述倍数为大于或等于1的整数。
46.根据附记28至44任一项所述的方法，其中，所述第一周期至少根据PRACH配置周期(configuration period)和SSB突发(SSB burst)周期中的最大值的倍数被确定，所述倍数为大于或等于1的整数。
47.根据附记28至44任一项所述的方法，其中，所述第一周期至少根据预定值(160ms)的倍数被确定，所述倍数为大于或等于1的整数。
48.根据附记28至47任一项所述的方法，其中，
所述第一数量为由网络设备配置和/或指示的值，或者，所述第一数量为默认值或固定值，或者，所述第一数量为由所述终端设备确定的值，所述第一数量为大于或等于1的整数。
49.根据附记28至49任一项所述的方法，其中，所述时间周期的最大值为T1，和/或，所述第一周期的最大值为T2。
50.根据附记30所述的方法，其中，在所述PRACH机会组(RO group)关联图样周期(GRAPP)内，对于SSB索引到PRACH机会组(RO group)的整数个映射循环之外的一个或多个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。
51.根据附记30所述的方法，其中，在所述PRACH机会组(RO group)关联图样周期(GRAPP)内，对于SSB索引到PRACH机会组(RO group)的整数个映射循环之外的PRACH机会(RO)，在所述PRACH机会(RO)上映射第五数量的SSB索引，所述第五数量小于所述第三数量，所述第五数量为大于或等于1的整数。
52.根据附记51所述的方法，其中，所述第五数量的SSB索引为所述第三数量的SSB索引中的前M个SSB索引，或者，为所述第三数量的SSB索引中的后M个SSB索引，或者，为所述第三数量的SSB索引中的随机M个SSB索引，M为大于或等于1的整数。
53.根据附记28至52任一项所述的方法，其中，SSB索引到PRACH机会组(RO group)的映射中，PRACH机会组(RO group)为时域资源相邻且频域资源相同的第二数量N个PRACH机会(RO)。
54.根据附记53所述的方法，其中，SSB索引到PRACH机会组(RO group)的映射顺序包括：
在PRACH机会组(RO group)或PRACH机会(RO)内按照前导索引的递增顺序映射；
对于频域复用的PRACH机会组(RO group)或PRACH机会(RO)，按照频域资源索引的递增顺序映射；
对于时域复用的PRACH机会组(RO group)或PRACH机会(RO)，在PRACH时隙内按照时域资源索引的递增顺序映射；
对于PRACH时隙按照索引的递增顺序映射。
55.一种终端设备，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27任一项所述的PRACH发送方法。
56.一种网络设备，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28至54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；其中所述时间周期包括第一数量的第一周期，所述第一周期中的PRACH机会组至少映射第三数量的同步信号块索引，并且所述第一周期中的PRACH机会或PRACH机会组形成重复的图样；
    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，所述第一周期为PRACH机会组关联图样周期，所述第二数量为所述PRACH发送的重复数目，所述第二数量为大于1的整数；所述第三数量为由网络设备配置和/或指示的值，所述第三数量为大于或等于1的整数。
  3. 根据权利要求2所述的装置，其中，所述PRACH机会组关联图样周期包括第四数量的第二周期，所述第四数量为大于或等于1的整数；
    所述第四数量为由网络设备配置和/或指示的值，或者，所述第四数量为默认值或固定值，或者，所述第四数量为由所述终端设备确定的值。
  4. 根据权利要求3所述的装置，其中，所述第二周期为PRACH机会组关联周期，所述PRACH机会组关联周期至少根据PRACH配置周期被确定。
  5. 根据权利要求4所述的装置，其中，对于重复数目为第二数量的PRACH发送，所述PRACH机会组关联周期内至少有一个PRACH机会组。
  6. 根据权利要求5所述的装置，其中，在所述PRACH机会组关联周期内，对于整数个PRACH机会组之外的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发送至少包括多PRACH发送。
  7. 根据权利要求5所述的装置，其中，所述PRACH机会组关联周期中包括所述PRACH配置周期的数目为候选值集合中的值，且所述数目为候选值集合中保证在所述PRACH机会组关联周期中至少确定一个PRACH机会组的最小值；
    或者，所述PRACH机会组关联周期中包括所述PRACH配置周期的数目为预定义值，或者为由网络设备配置/指示的值。
  8. 根据权利要求4所述的装置，其中，对于重复数目为第二数量的PRACH发送，所述PRACH机会组关联周期内所述第三数量的同步信号块索引被映射到PRACH机会组上至少一次。
  9. 根据权利要求8所述的装置，其中，在所述PRACH机会组关联周期内，对于同步信号块索引到PRACH机会组的整数个映射循环之外的一个或多个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发送至少包括多PRACH发送。
  10. 根据权利要求8所述的装置，其中，所述PRACH机会组关联周期中包括所述PRACH配置周期的数目为候选值集合中的值，且所述数目为候选值集合中保证在所述PRACH机会组关联周期中所述第三数量的同步信号块索引被映射到PRACH机会组上至少一次的最小值；
    或者，所述PRACH机会组关联周期中包括所述PRACH配置周期的数目为预定义值，或者为由网络设备配置/指示的值。
  11. 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，根据所述所有PRACH配置中PRACH发送的重复数目的最大值确定所述时间周期；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不同重复数目的多个PRACH发送，根据所述所有特征合并对应的不同重复数目的最大值确定所述时间周期；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不同重复数目的多个PRACH发送，根据所述一个特征合并对应的不同重复数目的最大值确定所述时间周期；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一个PRACH发送，根据所述一个特征对应的不同重复数目的最大值确定所述时间周期。
  12. 根据权利要求1所述的装置，其中，所述第一周期至少根据PRACH配置周期和同步信号块突发周期的最小公倍数的倍数被确定，所述倍数为大于或等于1的整 数；
    或者，所述第一周期至少根据PRACH配置周期和同步信号块突发周期中的最大值的倍数被确定，所述倍数为大于或等于1的整数；
    或者，所述第一周期至少根据预定值的倍数被确定，所述倍数为大于或等于1的整数。
  13. 根据权利要求1所述的装置，其中，
    所述第一数量为由网络设备配置和/或指示的值，或者，所述第一数量为默认值或固定值，或者，所述第一数量为由所述终端设备确定的值，所述第一数量为大于或等于1的整数。
  14. 根据权利要求1所述的装置，其中，所述时间周期的最大值为T1，和/或，所述第一周期的最大值为T2。
  15. 根据权利要求3所述的装置，其中，在所述PRACH机会组关联图样周期内，对于同步信号块索引到PRACH机会组的整数个映射循环之外的一个或多个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。
  16. 根据权利要求3所述的装置，其中，在所述PRACH机会组关联图样周期内，对于同步信号块索引到PRACH机会组的整数个映射循环之外的PRACH机会，在所述PRACH机会上映射第五数量的同步信号块索引，所述第五数量小于所述第三数量，所述第五数量为大于或等于1的整数；
    其中，所述第五数量的同步信号块索引为所述第三数量的同步信号块索引中的前M个同步信号块索引，或者，为所述第三数量的同步信号块索引中的后M个同步信号块索引，或者，为所述第三数量的同步信号块索引中的随机M个同步信号块索引，M为大于或等于1的整数。
  17. 根据权利要求1所述的装置，其中，同步信号块索引到PRACH机会组的映射中，PRACH机会组为时域资源相邻且频域资源相同的第二数量的PRACH机会。
  18. 根据权利要求17所述的装置，其中，同步信号块索引到PRACH机会组的映射顺序包括：
    在PRACH机会组或PRACH机会内按照前导索引的递增顺序映射；
    对于频域复用的PRACH机会组或PRACH机会，按照频域资源索引的递增顺序 映射；
    对于时域复用的PRACH机会组或PRACH机会，在PRACH时隙内按照时域资源索引的递增顺序映射；
    对于PRACH时隙按照索引的递增顺序映射。
  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；其中所述时间周期包括第一数量的第一周期，所述第一周期中的PRACH机会组至少映射第三数量的同步信号块索引，并且所述第一周期中的PRACH机会或PRACH机会组形成重复的图样。
  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；其中所述时间周期包括第一数量的第一周期，所述第一周期中的PRACH机会组至少映射第三数量的同步信号块索引，并且所述第一周期中的PRACH机会或PRACH机会组形成重复的图样；
    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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