Random access method and apparatus, and communication system

Abstract

Embodiments of the present application provide a random access method and apparatus, and a communication system. The method comprises: in a cell, sending a random access preamble (PRACH) in a first valid RO and / or a second valid RO, wherein the first valid RO is located within a flexible time domain resource and / or an uplink time domain resource, and the second valid RO is located within a downlink time domain resource overlapping a first time domain resource and / or a flexible time domain resource overlapping the first time domain resource.

Description

Random access method, apparatus and communication system TECHNICAL FIELD

[0001] The present application relates to the field of communication technology. BACKGROUND

[0002] The random access procedure includes a contention based random access procedure and a non-contention based random access procedure. In the contention based random access procedure, a UE selects a preamble and a PRACH resource in the available preamble and PRACH resource configured by the network side (for example, a base station) for random access. In the non-contention based random access procedure, a user equipment (UE) uses a specific random access preamble and a physical random access channel (PRACH) resource configured by the network side (for example, a base station) for random access.

[0003] It should be noted that the above introduction to the technical background is only for the convenience of clearly and completely describing the technical scheme of the present application, and for the convenience of understanding by those skilled in the art. The above technical scheme cannot be considered as known to those skilled in the art only because it is described in the background section of the present application.

[0004] SUMMARY

[0005] At present, with the increasing growth of new services and new device types, the requirements for coverage, capacity, latency, etc. of random access are getting higher and higher, and it is necessary to enhance the random access. For example, for a time division duplex (TDD) frequency band, the uplink transmission in the random access procedure can only occur in the uplink time period, and when a limited or small uplink time period is allocated, there will be problems of small coverage, capacity and large latency of random access. For example, for a frequency division duplex (FDD) frequency band, the uplink transmission in the random access procedure can only occur in the uplink carrier, and when a limited or small uplink carrier is allocated, there may also be problems of small coverage, capacity and large latency of random access.

[0006] To solve at least one of the above problems, the embodiments of the present application provide a random access method, apparatus and communication system.

[0007] According to a further aspect of the embodiments of the present application, a random access apparatus is provided, applied to a terminal device, comprising: a first sending unit configured to send a random access preamble in a first valid RO and / or a second valid RO in a cell; wherein the first valid RO is within flexible time domain resources and / or uplink time domain resources, and the second valid RO is within downlink time domain resources overlapping with the first time domain resources and / or flexible time domain resources overlapping with the first time domain resources.

[0008] According to a further aspect of the embodiments of the present application, a random access apparatus is provided, applied to a network device, comprising: a receiving unit configured to receive a random access preamble in a first valid RO and / or a second valid RO; wherein the first valid RO is within flexible time domain resources and / or uplink time domain resources, and the second valid RO is within downlink time domain resources overlapping with the first time domain resources and / or flexible time domain resources overlapping with the first time domain resources.

[0009] According to a further aspect of the embodiments of the present application, a communication system is provided, comprising: a terminal device and / or a network device, wherein the terminal device comprises the apparatus of the foregoing aspect, and the network device comprises the apparatus of the foregoing further aspect.

[0010] One of the beneficial effects of the embodiments of the present application is that the method for random access of the terminal device is provided, which can support the terminal device to send a random access preamble to a network device in PRACH resources of flexible time domain resources and / or uplink time domain resources and / or downlink time domain resources overlapping with the first time domain resources, that is, to support uplink transmission of random access by using resources in flexible time domain resources and / or uplink time domain resources, downlink time domain resources overlapping with the first time domain resources and / or flexible time domain resources overlapping with the first time domain resources, so as to increase the coverage, capacity and reduce the time delay of random access.

[0011] Specific embodiments of the application are disclosed herein, and represented in the accompanying drawings, indicating the principles of the application can be employed. It will be understood that the scope of the embodiments of the present application is not limited in scope by the specific embodiments described herein. In the scope of the appended claims and their equivalents, the embodiments of the present application include many changes, modifications and equivalents.

[0012] Features described and / or illustrated with respect to one implementation can be used in one or more other implementations in the same or similar manner, in combination with or in place of features in other implementations.

[0013] It should be emphasized that the term "comprises / comprising" when used herein is taken to mean the presence of stated features, integers, steps or components, but not to the exclusion of one or more other features, integers, steps or components, or groups thereof. BRIEF DESCRIPTION OF DRAWINGS

[0014] Elements and features depicted in one drawing or embodiment of the application can be combined with elements and features depicted in one or more other drawings or embodiments, as

[0015] The accompanying drawings are included to provide a further understanding of embodiments of the application, and are incorporated in and constitute a part of this specification, illustrate embodiments of the application, and together with the description serve to explain principles of the application. It is to be understood that other embodiments can be utilized, and structural and functional modifications can be made without departing from the scope of the present application. In the drawings, like reference numerals refer to like elements throughout the several views, of which:

[0016] FIG. 1 is a schematic diagram of a communication system according to an embodiment of the application;

[0017] FIG. 2 is a schematic diagram of a time domain resource type according to an embodiment of the application;

[0018] FIG. 3 is a schematic diagram of a time domain resource according to an embodiment of the application;

[0019] FIG. 4A to FIG. 4D are schematic diagrams of a frequency domain resource according to an embodiment of the application;

[0020] FIG. 5 is a schematic diagram of a random access method according to an embodiment of the application;

[0021] FIG. 6 is a schematic diagram of information configuration according to an embodiment of the application;

[0022] FIG. 7A to FIG. 7G are schematic diagrams of information configuration according to an embodiment of the application;

[0023] FIG. 8A to FIG. 8F are schematic diagrams of determining a valid RO according to an embodiment of the application;

[0024] FIG. 9 is a schematic diagram of information configuration according to an embodiment of the application;

[0025] FIG. 10 is a schematic diagram of SSB-RO mapping according to an embodiment of the application;

[0026] FIG. 11 is a schematic diagram of a random access apparatus according to an embodiment of the application;

[0027] FIG. 12 is a schematic diagram of a random access method according to an embodiment of the application;

[0028] FIG. 13 is a schematic diagram of a random access apparatus according to an embodiment of the application;

[0029] FIG. 14 is a schematic diagram of a terminal device according to an embodiment of the application;

[0030] FIG. 15 is a schematic diagram of a network device according to an embodiment of the present application;

[0031] FIG. 16 is a schematic diagram of a random access procedure according to an embodiment of the present application. DETAILED DESCRIPTION

[0032] The foregoing and other features of the present application will become more apparent from the following description and accompanying drawings. In the description and drawings, particular embodiments of the application have been disclosed in detail as being indicative of the principles of the application, among which those skilled in the art will recognize the principles of the application. It is therefore contemplated that the application can be carried out in other ways, structures, and materials equivalent to those

[0033] In the embodiments of the present application, the terms "first", "second", and the like are used to distinguish different elements from each other, but do not indicate spatial arrangement or time sequence, and the elements should not be limited by these terms. The term "and / or" includes any one and all combinations of the associated listed terms. The terms "comprise", "include", "have", and the like mean the presence of the stated features, elements, components, or assemblies, but do not exclude the presence or addition of one or more other features, elements, components, or assemblies.

[0034] In the embodiments of the present application, the singular forms "a", "an", and "the" include the plural forms, should be broadly understood as "one" or "one kind" rather than the meaning of "one", and in addition, the term "said" should be understood as including both singular and plural forms, unless the context clearly indicates otherwise. In addition, the term "according to" should be understood as "at least partially according to", and the term "based on" should be understood as "at least partially based on", unless the context clearly indicates otherwise.

[0035] In the embodiments of the present application, the term "communication network" or "wireless communication network" can refer to a network that conforms to any communication standard, such as Long Term Evolution (LTE), LTE-Advanced (LTE-A), Wideband Code Division Multiple Access (WCDMA), High-Speed Packet Access (HSPA), and the like.

[0036] Also, communication between devices in a communication system can be in accordance with communication protocols of any stage, for example, can include but is not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G, and future 5G, New Radio (NR), 6G, etc., and / or other currently known or to be developed communication protocols.

[0037] In embodiments of the present application, the term "network device" refers to, for example, a device that accesses a terminal device to a communication network and provides services for the terminal device in a communication system. The network device can 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.

[0038] The base station can include but is not limited to: Node B (NodeB or NB), evolved Node B (eNodeB or eNB), and 5G base station (gNB), IAB donor, etc., and can also include remote radio head (RRH), remote radio unit (RRU), relay, or low-power node (such as femto, pico, etc.). Also, the term "base station" can include some or all functions thereof, and each base station can provide communication coverage for a specific geographic 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.

[0039] In embodiments of the present application, the term "user equipment" (UE) refers to, for example, a device that accesses a communication network through a network device and receives network services, which can also be referred to as "terminal equipment" (TE). The terminal equipment can be fixed or mobile, and can also be referred to as a mobile station (MS), a terminal, a user, a subscriber station (SS), an access terminal (AT), a station, a mobile terminal (MT), etc.

[0040] The terminal device can include, but is not limited to, the following devices: cellular phone, personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, machine type communication device, laptop computer, cordless phone, smartphone, smartwatch, digital camera, and the like.

[0041] For another example, in scenarios such as Internet of Things (IoT), the terminal device can also be a machine or apparatus that performs monitoring or measurement, which can include, but is not limited to, the following: machine type communication (MTC) terminal, vehicle-mounted communication terminal, device to device (D2D) terminal, machine to machine (M2M) terminal, and the like.

[0042] In addition, the term "network side" or "network device side" refers to the side of the network, which can be a certain base station, or can include one or more network devices as described above. The term "user side" or "terminal side" or "terminal device side" refers to the side of the user or terminal, which can be a certain UE, or can include one or more terminal devices as described above. In this article, "device" can refer to a network device or a terminal device without special indication.

[0043] In the following description, the terms "uplink control signal" and "uplink control information (UCI)" or "physical uplink control channel (PUCCH)" can be interchangeable without causing confusion, and the terms "uplink data signal" and "uplink data information" or "physical uplink shared channel (PUSCH)" can be interchangeable;

[0044] The terms "downlink control signal" and "downlink control information (DCI)" or "physical downlink control channel (PDCCH)" can be interchangeable, and the terms "downlink data signal" and "downlink data information" or "physical downlink shared channel (PDSCH)" can be interchangeable.

[0045] In addition, the uplink signal can include an uplink data signal and / or an uplink control signal and / or a PRACH and / or an SRS, etc., and can also be referred to as an uplink transmission (UL transmission) or uplink information or an uplink channel. Transmitting / receiving the uplink transmission on the uplink resource can be understood as transmitting / receiving the uplink transmission using the uplink resource. The downlink signal can include a downlink data signal and / or a downlink control signal and / or a synchronization signal (SS, for example, PSS / SSS) and / or a broadcast channel (PBCH) and / or an SSB (SS / PBCH block, including PSS, SSS and PBCH and its DMRS) and / or a CSI-RS, etc., and can also be referred to as a downlink transmission (DL transmission) or downlink information or a downlink channel. Transmitting / receiving the downlink transmission on the downlink resource can be understood as transmitting / receiving the downlink transmission using the downlink resource.

[0046] In the embodiments of the present application, each indication information or information can be carried by high layer signaling and / or physical layer signaling, and when carried by high layer signaling, the indication information or information can also be referred to as a high layer parameter, and the present application is not limited in this way.

[0047] In the embodiments of the present application, the high layer signaling can be, for example, radio resource control (RRC) signaling; the RRC signaling can include, for example, an RRC message, for example, a broadcast / common RRC message / signaling (for example, a master information block (MIB), system information), a dedicated RRC message / signaling; or an RRC information element (RRC IE); or an information field included in the RRC message or the RRC information element (or an information field included in the information field). The high layer signaling can also be, for example, medium access control (MAC) signaling; or a MAC control element (MAC CE). However, the present application is not limited in this way. The names of the signaling (for example, RRC message, information element IE, information field, high layer parameter, etc.) used in the embodiments of the present application are only examples, and other names can also be used, and the present application is not limited in this way.

[0048] In the embodiments of the present application, multiple means at least two, or two or more.

[0049] In embodiments of the present application, pre-defined means defined by a protocol or determined according to rules defined by a protocol, without additional configuration. Configuration / indication means direct or indirect configuration / indication by a network device through high-layer signaling and / or physical-layer signaling. Configuration / indication can be introduced by introducing a high-layer parameter in high-layer signaling, where the high-layer parameter refers to fields and / or information elements / units / members (IEs) in high-layer signaling. Physical-layer signaling refers to control information (DCI) carried by a physical downlink control channel, but is not limited thereto.

[0050] In embodiments of the present application, “overlapping” includes complete / total overlapping and / or partial overlapping and / or at least partial overlapping. “Located in” includes complete / total located in and / or partial located in and / or at least partial located in, and “located within” includes complete located within.

[0051] For ease of description, a base station is taken as an example of an access network device in the following description. In the following description, “if”, “in the case of” and “when” can be used interchangeably without causing confusion. For resources in the frequency domain, “carrier” and “resource grid” can be used interchangeably, “subcarrier spacing configuration (SCS) μ” and “subcarrier spacing (SCS) Δf” can be used interchangeably. “Subcarrier spacing” and “numerology” can be used interchangeably. “Resource block”, “RB” and “PRB”, “physical resource block”, “common resource block (CRB)” can be used interchangeably. “Configuration / indication / provision / given” can be used interchangeably. “Index” and “ID” can be used interchangeably.

[0052] The scenarios of embodiments of the present application are described below by way of examples, but the present application is not limited thereto.

[0053] FIG. 1 is a schematic diagram of a communication system according to an embodiment of the present application, which schematically illustrates a case taking a terminal device and a network device as examples. As shown in FIG. 1, the communication system 100 can include a network device 101 and terminal devices 102 and 103. For simplicity, FIG. 1 illustrates only two terminal devices and one network device as examples, but embodiments of the present application are not limited thereto.

[0054] In the embodiments of the present application, the network device 101 and the terminal devices 102 and 103 can perform existing services or future implementable service transmission. For example, these services can include, but are not limited to, enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable and low-latency communication (URLLC), etc.

[0055] In the embodiments of the present application, the network device 101 and the terminal devices 102 and 103 can perform existing services or future implementable service transmission. For example, these services can include, but are not limited to, enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable and low-latency communication (URLLC), etc.

[0056] In the embodiments of the present application, the network device 101 and the terminal devices 102 and 103 can perform existing services or future implementable service transmission. For example, these services can include, but are not limited to, enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable and low-latency communication (URLLC), etc.

[0057] It is worth noting that FIG. 1 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 can be outside 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.

[0058] The following describes the terms related to the embodiments of the present application.

[0059] -- Subcarrier spacing

[0060] The subcarrier spacing of one BWP is configurable, and the candidate subcarrier spacing is shown in Table 1 below. The BWP includes an integer number of PRBs using the SCS.

[0061] For uplink and downlink transmission on one BWP, the SCS configured for a downlink BWP is applicable to downlink signals or channels in the DL BWP except SSB, and the SCS configured for an uplink BWP is applicable to uplink signals or channels in the UL BWP except PRACH.

[0062] Table 1

[0063] PRACH preamble format (or PRACH format, or preamble format

[0064] As shown in Table 4, the SCS of PRACH is bound with its format. Therefore, if configured with one of the formats, the SCS of PRACH does not need to be indicated additionally.

[0065] Table 4

[0066] PRACH preamble formats for L RA = 839 and Δf RA ∈{1.25,5}kHz.

[0067] Table 5

[0068] Preamble formats for L RA ∈{139,571,1151}and Δf RA = 15·2 μ kHz where μ∈{0,1,2,3,5,6}.

[0069] As shown in Table 5, one format corresponds to multiple possible sequence lengths and SCSs, therefore, if configured with one of the formats, the corresponding sequence length and SCS need to be indicated.

[0070] In some embodiments, to improve the capacity, coverage, and reduce the latency of uplink transmission, in a downlink frequency band of a TDD frequency band or a FDD frequency band, a network device can work in full duplex mode (e.g., simultaneously receive and transmit in different frequency domain resources therein) at certain time positions. This working mode is referred to as sub-band non-overlapping full duplex (SBFD) for example, but is not limited thereto. For example, a first time domain resource is a time domain resource for (supporting / performing) full duplex (e.g., SBFD) operation. The time positions of the first time domain resource and a second time domain resource are different. In some embodiments, the second time domain resource is a time domain resource that is not used for (supporting / performing) full duplex operation (or, is not for full duplex operation, e.g., non-SBFD). For example, in the first time domain resource, the network device simultaneously receives and transmits in different frequency domain resources in a corresponding carrier (of the downlink frequency band of the TDD frequency band or the FDD frequency band), and in the second time domain resource, the network device only receives or transmits in the carrier.

[0071] In some embodiments, the first time domain resource refers to a time domain resource with / corresponding to SBFD subbands, or a time domain resource where SBFD subbands are located, and the second time domain resource refers to a time domain resource without / corresponding to SBFD subbands. The SBFD subbands include, for example, DL subband(s) and / or uplink subband(s).

[0072] In some embodiments, there is a thirteenth time interval between the first time domain resource and the second time domain resource, or a fourteenth time interval between transmitting an uplink signal at the first time domain resource and transmitting an uplink signal at the second time domain resource, and / or a fifteenth time interval between receiving a downlink signal at the first time domain resource and receiving a downlink signal at the second time domain resource, the thirteenth time interval and / or the fourteenth time interval is not less than a (minimum) time period for the terminal device to switch bandwidth and / or beam and / or transmit power, and the thirteenth time interval and / or the fifteenth time interval is not less than a (minimum) time period for the terminal device to switch bandwidth and / or beam. The (minimum) time period can be predefined or reported, and the embodiments of the present application are not limited in this regard.

[0073] In some embodiments, the thirteenth time interval and / or the fourteenth time interval and / or the fifteenth time interval is predefined and / or reported and / or indicated, for example, the terminal device carries information for indicating the above-mentioned time intervals in the capability information sent to the network device, and the embodiments of the present application are not limited in this regard.

[0074] In some embodiments, each time domain resource and / or time interval includes one or more time domain resource units.

[0075] In some embodiments, a time domain resource unit includes, for example, a symbol, a slot, a sub-slot, a mini-slot, a symbol group, a slot group, a subframe, a frame, a ms, a s, etc., without being limited thereto.

[0076] In some embodiments, a slot can include SBFD symbols and non-SBFD symbols, or only SBFD symbols, or only non-SBFD symbols.

[0077] In some embodiments, each frequency domain resource can respectively include one or more continuous frequency domain resource units or multiple discontinuous frequency domain resource units, or each frequency domain resource is composed of one or more continuous frequency domain resource units or multiple discontinuous frequency domain resource units. Wherein, the frequency domain resource unit includes one or more of subcarriers, subcarrier sets / groups, RBs, RB sets / groups, etc.

[0078] The following describes the time domain resource type and the frequency domain resource type involved in the embodiments of the present application.

[0079] Time domain resource type:

[0080] FIG. 2 is a schematic diagram of the time domain resource type of the embodiments of the present application. As shown in FIG. 2. Wherein, it is assumed in FIG. 2 that one time slot includes 14 symbols, but the embodiments of the present application are not limited thereto.

[0081] Downlink time domain resource: for example, referred to as DL symbols (downlink symbols), including symbols configured as downlink by common uplink-downlink configuration information;

[0082] Uplink time domain resource: for example, referred to as UL symbols (uplink symbols), including symbols configured as uplink by common uplink-downlink configuration information;

[0083] Flexible time domain resource: for example, referred to as Flexible symbols (flexible symbols), including symbols not configured as downlink or uplink by common uplink-downlink configuration information, or configured as flexible symbols, for example, including symbols not configured as downlink or uplink by common uplink-downlink configuration information or configured as flexible symbols by common uplink-downlink configuration information when the UE is provided with common uplink-downlink configuration information, or including all symbols when the UE is not provided with common uplink-downlink configuration information.

[0084] First time domain resource: for example, referred to as SBFD symbols (SBFD symbols),

[0085] For example, configured by second indication information, the second indication information is used to configure (cell-specific) first time domain resource and / or second time domain resource, for example, SBFD symbols (SBFD symbols) include DL SBFD symbols (DL SBFD symbols) and / or Flexible SBFD symbols (Flexible SBFD symbols), but not limited thereto.

[0086] Second time domain resource: for example, referred to as Non-SBFD symbols, for example, configured by the second indication information, the second indication information is used to configure the (cell-specific) first time domain resource and / or the second time domain resource, for example, the Non-SBFD symbols include Full-DL symbols and / or Full-UL symbols and / or Full-Flexible symbols, but not limited to this.

[0087] Downlink time domain resource overlapping with the first time domain resource: or the first time domain resource overlapping with the downlink time domain resource or the downlink time domain resource configured as the first time domain resource or the first time domain resource configured in the downlink time domain resource (inside), for example, referred to as DL SBFD symbols / SBFD DL symbols, for example, including the SBFD symbol configured in the DL symbol by the second indication information or the SBFD symbol configured as downlink by the common uplink and downlink configuration information.

[0088] Flexible time domain resource overlapping with the first time domain resource: or the first time domain resource overlapping with the flexible time domain resource or the flexible time domain resource configured as the first time domain resource or the first time domain resource configured in the flexible time domain resource (inside), for example, referred to as Flexible SBFD symbols / SBFD Flexible symbols, for example, the SBFD symbol configured in the Flexible symbol by the second indication information or the SBFD symbol configured as Flexible by the common uplink and downlink configuration information.

[0089] Downlink time domain resource not overlapping with the first time domain resource: or for example, the downlink time domain resource not configured as the first time domain resource or the second time domain resource overlapping with the downlink time domain resource or the downlink time domain resource overlapping with the second time domain resource or the downlink time domain resource configured as the second time domain resource or the second time domain resource configured in the downlink time domain resource, including for example, referred to as Full-DL symbols / DL-only symbols / DL non-SBFD symbols / non-SBFD DL symbols, the symbol configured as downlink and not configured SBFD subband by the common uplink and downlink configuration information.

[0090] Uplink time domain resource not overlapping with the first time domain resource: for example, uplink time domain resource not configured as the first time domain resource or second time domain resource overlapping with the uplink time domain resource or uplink time domain resource overlapping with the second time domain resource or uplink time domain resource configured as the second time domain resource or uplink time domain resource configured in the second time domain resource of the uplink time domain resource, for example, referred to as Full-UL symbols / UL-only symbols / UL non-SBFD symbols / non-SBFD UL symbols (Full-UL symbols / UL-only symbols / UL non-SBFD symbols / non-SBFD UL symbols), for example, including symbols configured as uplink by common uplink-downlink configuration information and not configured as SBFD subbands. In some embodiments, the terminal device does not expect the uplink time domain resource to overlap with the first time domain resource, that is, uplink time domain resource not overlapping with the first time domain resource = uplink time domain resource, and the two can be replaced with each other.

[0091] Flexible time domain resource not overlapping with the first time domain resource: for example, flexible time domain resource not configured as the first time domain resource or second time domain resource overlapping with the flexible time domain resource or flexible time domain resource overlapping with the second time domain resource or flexible time domain resource configured as the second time domain resource or flexible time domain resource configured in the second time domain resource of the flexible time domain resource, for example, referred to as Full-flexible symbols / Flexible-only symbols / Flexible non-SBFD symbols / non-SBFD Flexible symbols (Full-flexible symbols / Flexible-only symbols / Flexible non-SBFD symbols / non-SBFD Flexible symbols), for example, including symbols configured as flexible and not configured as SBFD subbands.

[0092] Wherein, the common uplink-downlink configuration information is, for example, tdd-UL-DL-ConfigurationCommon or TDD-UL-DL-ConfigCommon, but is not limited thereto.

[0093] Frequency domain resource type:

[0094] 1. First frequency domain resource

[0095] In SBFD symbols, frequency domain resources, e.g., PRBs and / or subcarriers, in a carrier that are only used for uplink transmission, e.g., referred to as UL subband, or uplink SBFD subband, or SBFD uplink subband, or uplink RB set (i.e., RB set used for uplink), or uplink SBFD RB set, or SBFD uplink RB set, are configured by the third indication information, which is used to configure the (cell-specific) first frequency domain resources and / or the third frequency domain resources. For example:

[0096] The uplink subband can be located at one side of the carrier or in the middle of the carrier.

[0097] The maximum value of the UL subbands for SBFD operation in SBFD symbols within one TDD carrier is 1.

[0098] 2. Second frequency domain resources

[0099] In SBFD symbols and / or non-SBFD symbols, frequency domain resources, e.g., PRBs and / or subcarriers, in an uplink BWP that are available for uplink transmission; e.g., referred to as UL usable PRBs / RBs.

[0100] Wherein, the definition of the second frequency domain resources is different for SBFD symbols and non-SBFD symbols. For example, in SBFD symbols, the second frequency domain resources include PRBs and / or subcarriers in the uplink BWP that belong to the (cell-specific) first frequency domain resources, or the intersection (of PRBs and / or subcarriers) of the uplink BWP and the (cell-specific) first frequency domain resources, or PRBs and / or subcarriers in the uplink BWP that overlap with the (cell-specific) first frequency domain resources, and in non-SBFD symbols, the second frequency domain resources include PRBs and / or subcarriers in the uplink BWP. Wherein, the SCS of the uplink BWP (including PRBs and / or subcarriers) and the SCS of the (cell-specific) first frequency domain resources (including PRBs and / or subcarriers) are the same or different.

[0101] For example, the uplink BWP can be an initial uplink BWP or other uplink BWP

[0102] In some embodiments, the uplink BWP refers to an active uplink BWP, e.g., the terminal device transmits uplink signals in the second frequency domain resources of the active uplink BWP, but is not limited thereto.

[0103] FIGS. 3-4D are schematic diagrams of the frequency domain resource types of the embodiments of the present application. The frequency domain resource types of the embodiments are described below in conjunction with the accompanying drawings.

[0104] (1) Alt. 1: Define UL usable PRBs / RBs only for SBFD symbols

[0105] For example, as shown in FIG. 3 and FIG. 4A, FIG. 4B, for SBFD symbols, the UL usable PRBs include the intersection of (cell-specific) UL subband and UL BWP, e.g. the shaded part in the figures for SBFD symbols, no UL usable PRBs are defined for non-SBFD symbols.

[0106] (2) Alt. 2: Define UL usable PRBs / RBs separately for SBFD symbols and non-SBFD symbols (e.g. Full-DL and / or Full-Flexible / UL symbols)

[0107] For example, as shown in FIG. 4C, for SBFD symbols, the UL usable PRBs / RBs of SBFD symbols include the intersection of (cell specific) UL subband and UL BWP; for Full-Flexible / UL symbols, the UL usable PRBs are PRBs within the UL BWP, no UL usable PRBs are defined for full-DL symbols;

[0108] For example, as shown in FIG. 4D, for SBFD symbols, it is the same as FIG. 4C for Full-Flexible / UL symbols, for non-SBFD symbols, the UL usable PRBs are PRBs in the UL BWP.

[0109] 3. Third frequency domain resource

[0110] In SBFD symbols, frequency domain resources, e.g. physical resource blocks (PRBs) and / or subcarriers, in a carrier that are only used for downlink transmission, e.g. referred to as DL subband (downlink subband), or downlink SBFD subband, or SBFD downlink subband, or downlink RB set (i.e. RB set used for uplink), or downlink SBFD RB set, or SBFD downlink RB set, are configured, e.g. by the fourth indication information, e.g.:

[0111] The downlink subband can be located at one side of the carrier or in the middle of the carrier.

[0112] The maximum value of UL subbands used for SBFD operation in SBFD symbols within one TDD carrier is 1.

[0113] The fourth indication information and the third indication information are included in the same or different RRC IE or information field or message.

[0114] 4. Fourth frequency domain resource

[0115] In SBFD symbols and / or non-SBFD symbols, the frequency domain resources, such as PRBs and / or subcarriers, available for downlink transmission in a DL BWP; for example, referred to as DL usable PRBs / RBs of a DL BWP; wherein the definition of the second frequency domain resource is different for SBFD symbols and non-SBFD symbols, as described above.

[0116] (1) Alt.1: Define DL usable PRBs / RBs only for SBFD symbols

[0117] First case (Option 1):

[0118] For example, for SBFD symbols, the DL usable PRBs include the intersection between (cell specific) DL subband(s) and the DL BWP.

[0119] Second case (Option 2):

[0120] For example, for SBFD symbols, the DL usable PRBs are explicitly configured within the DL BWP of the SBFD symbols.

[0121] (2) Alt.2: Define UL usable PRBs / RBs for SBFD symbols and Full-Flexible / UL symbols respectively, or define UL usable PRBs / RBs for SBFD symbols and non-SBFD symbols respectively

[0122] For example, for SBFD symbols, the first case or the second case in (1) Alt.1 is adopted; for Full-Flexible / DL symbols or for non-SBFD symbols:

[0123] The DL usable PRBs are PRBs in the DL BWP.

[0124] The following describes the type of terminal device (UE) of the embodiments of the present application.

[0125] The terminal device of the embodiments of the present application includes a first terminal device (first UE) and a second terminal device (second UE); wherein,

[0126] The first UE: for example, a SBFD-aware UE, a UE with a capability related to SBFD operation, including one or more of the following: (1) capable of learning SBFD configuration, for example, the configuration of SBFD time domain resources (for example, SBFD symbols) and frequency domain resources (for example, UL subbands / UL usable RBs, DL subbands / DL usable RBs); (2) capable of sending uplink signals on SBFD symbols or DL SBFD symbols.

[0127] The second UE: for example, including a legacy UE or a non-SBFD aware UE, a UE without a capability related to SBFD operation.

[0128] The various embodiments of the embodiments of the present application will be described below in conjunction with the accompanying drawings. These embodiments are only exemplary and are not a limitation on the present application.

[0129] It should be noted that in the features of each of the following embodiments, in order to avoid too much length, the features / schemes are placed in brackets, but the features or schemes in the brackets, such as "(for 4-step random access procedure)", "(cell-specific)", and the like, are optional, and can be used as a limitation on the features, or can not be used as a limitation on the features (equivalent to deleting the features), due to the length of the relationship, it is explained here that in each of the following embodiments, no longer tedious.

[0130] Embodiments of the first aspect

[0131] The embodiments of the present application provide a random access method, which is described from the side of the terminal device.

[0132] FIG. 5 is a flowchart of a random access method according to an embodiment of the present application. As shown in FIG. 5, the method includes:

[0133] 501, in a cell, sending a random access preamble in a first valid RO and / or a second valid RO;

[0134] Wherein the first valid RO is located in a flexible time domain resource and / or an uplink time domain resource, and the second valid RO is located in a downlink time domain resource overlapping the first time domain resource and / or a flexible time domain resource overlapping the first time domain resource.

[0135] It is noticeable that the above Figure 5 only schematically illustrates the embodiments of the present application, but the present application is not limited thereto. For example, the execution order between various operations can be properly adjusted, and in addition, some other operations can be added or some operations can be reduced. Those skilled in the art can properly modify them according to the above description, and the present application is not limited to the above Figure 5.

[0136] In some embodiments, the terminal device can be a first terminal device (first UE) or a second terminal device (second UE), which has been described above and will not be repeated here.

[0137] In some embodiments, the sending of the random access preamble can also be referred to as sending PRACH.

[0138] In some embodiments, the terminal device sends the random access preamble in the first valid RO and / or the second valid RO of the activated UL BWP, which is the initial UL BWP or other UL BWP.

[0139] In some embodiments, the first valid RO is located in / within the flexible time domain resource and / or the uplink time domain resource, including or excluding the case of crossing the two types of time domain resources, for example, the first valid RO can be located in / within the flexible time domain resource (Flexible symbols) or the uplink time domain resource (UL symbols), i.e. excluding the case of crossing the two types of time domain resources; or part of the first valid RO is located in / within the flexible time domain resource (Flexible symbols) and the other part is located in / within the uplink time domain resource (UL symbols), i.e. crossing the two types of time domain resources.

[0140] In some embodiments, the second valid RO is completely and / or partially and / or at least partially in / within the downlink time domain resource (or in / within the first time domain resource configured in the downlink time domain resource) overlapping with the first time domain resource, such as DL SBFD symbols, or in other words, the second valid RO completely and / or partially and / or at least partially overlaps with the DL SBFD symbols.

[0141] In some embodiments, the second valid RO does not overlap with the first valid RO.

[0142] In some embodiments, when the terminal device is a first UE, the first UE has the capability of sending an uplink signal in the first time domain resource (such as SBFD symbols) or in the downlink time domain resource (DL SBFD symbols) overlapping with the first time domain resource and / or in the flexible time domain resource overlapping with the first time domain resource.

[0143] In some embodiments, the method can further include (not shown in the figures): receiving first indication information for indicating random access parameters, the first indication information including information for configuring ROs. For example, the first indication information is for the cell, i.e., receiving first indication information for indicating cell-specific random access parameters for the cell, but not limited thereto.

[0144] In some embodiments, the ROs configured by the first indication information include first ROs and / or second ROs, the first ROs being located in / in flexible time domain resources and / or uplink time domain resources, the second ROs being located in downlink time domain resources overlapping with the first time domain resources and / or flexible time domain resources overlapping with the first time domain resources, the second ROs not overlapping with the first ROs.

[0145] In some embodiments, the ROs configured by the first indication information include first valid ROs and / or second valid ROs. For example, only the first valid ROs, or only the second valid ROs, or both the first valid ROs and the second valid ROs.

[0146] In some embodiments, the valid RO in the first ROs is the first valid RO, and the valid RO in the second ROs is the second valid RO.

[0147] In some embodiments, the valid ROs only include the first valid ROs, and the terminal device only sends a random access preamble (PRACH) in the first valid ROs; or, when the terminal device is provided with information for indicating that the valid ROs include the second valid ROs, the valid ROs include both the first valid ROs and the second valid ROs, or the valid ROs only include the second valid ROs.

[0148] In some embodiments, when the ROs configured by the first indication information include the second valid ROs, the terminal device only sends a random access preamble in the second valid ROs (i.e., does not send a random access preamble in the first ROs or the first valid ROs, or only the second valid ROs are used by the terminal device to send a random access preamble, and the first ROs or the first valid ROs are not used by the terminal device to send a random access preamble); or, in the same random access procedure, the terminal device only sends a random access preamble in the first valid ROs or only in the second valid ROs; or, in the same random access procedure, the terminal device sends a random access preamble in the first valid ROs and / or the second valid ROs.

[0149] In some embodiments, the first indication information can be used for configuring random access parameters and / or for providing RACH configuration. For example, the first indication information is used for configuring cell-specific random access parameters (for 4-step random access procedure) and / or for providing cell-specific RACH configuration (for 4-step random access procedure); or, for configuring feature or feature combination-specific random access parameters (for 4-step random access procedure) and / or for providing feature or feature combination-specific RACH configuration (for 4-step random access procedure); or, for configuring cell-specific random access parameters (for 4-step random access procedure) for the first UE and / or for providing (cell-specific) RACH configuration (for 4-step random access procedure) for the first UE.

[0150] It should be noted that the above examples are merely specific examples, but the present application is not limited to the above examples, and the corresponding parameters can be configured and / or the corresponding RACH configuration can be provided according to actual situations.

[0151] In some embodiments, the first indication information is included in BWP configuration information, for example, is included in an IE for configuring common parameters of an uplink BWP (UL BWP), such as BWP-UplinkCommon, which provides random access parameters that can be applied to random access performed on the UL BWP. The UL BWP can be an initial UL BWP or other UL BWP configured. For the initial UL BWP of a cell, the BWP-UplinkCommon is included in a system information block (SIB), such as SIB1 or other SIBs different from SIB1, such as SIB uplink common configuration information (UplinkConfigCommonSIB) in SIB service cell common configuration information included in SIB1 and / or uplink common configuration information (UplinkConfigCommon) in dedicated RRC signaling (such as in the service cell common configuration information (ServingCellConfigCommon) of the cell); for other UL BWP of the cell, the BWP-UplinkCommon is included in dedicated RRC signaling (such as BWP-Uplink in (ServingCellConfig)), but is not limited thereto, which is not listed here.

[0152] In some embodiments, the first indication information can be directly included in the BWP-UplinkCommon or in the additionalRACH-ConfigList-r17 in the BWP-UplinkCommon.

[0153] In some embodiments, the first indication information can be rach-ConfigCommon or rach-ConfigCommon-17 in the additionalRACH-ConfigList-r17, but it is only an example, and the present application is not limited thereto. Among them, rach-ConfigCommon is used to configure cell-specific random access parameters for 4-step random access procedures, and rach-ConfigCommon-17 in the additionalRACH-ConfigList-r17 is used to configure feature or feature combination-specific random access parameters for 4-step random access procedures.

[0154] In some embodiments, for the same uplink BWP (UL BWP), the BWP configuration information thereof can include one or more than one first indication information, for example, only rach-ConfigCommon (used to configure cell-specific random access parameters), or rach-ConfigCommon and rach-ConfigCommon-17, or rach-ConfigCommon and rach-ConfigCommon-19, or other various combinations, which will not be described here.

[0155] In some embodiments, random access parameters are independently configured for different UL BWPs, for example, the first indication information corresponding to different UL BWPs are independent of each other or the first indication information corresponding to different UL BWPs are different.

[0156] In some embodiments, the first indication information can be referred to as RACH configuration, and one first indication information corresponds to one RACH configuration.

[0157] It should be noted that in the above features, the features or schemes in the brackets, such as "(for 4-step random access procedures)", etc., are optional and can be used as a limitation of the features or not (equivalent to deleting the features). Due to the length of the article, it is explained here and will not be described again.

[0158] In some embodiments, the first indication information includes information for configuring ROs (or referred to as PRACH resources, PRACH transmission occasions, RACH occasions, ROs, etc.), for example, the information includes at least one of the following information, but is not limited thereto, the information includes:

[0159] information for indicating a PRACH configuration index;

[0160] information for indicating a number of ROs in a frequency domain or a number of FDM (Frequency Division Multiplexing) ROs in a time instance;

[0161] information for indicating an offset of a lowest RO (start RB) in a frequency domain relative to a corresponding physical resource block (PRB) (reference RB).

[0162] The above information is illustrated by the following examples.

[0163] [According to Rule 26 Correction 20.11.2025] Table 1-1

[0164] As shown in Table 1-1, the information for indicating a PRACH configuration index includes, for example, prach-ConfigurationIndex or prach-ConfigurationIndex-19, which indicates a PRACH configuration index in a first table and a second table, the first table including random access configurations defined for TDD (unpaired spectrum), and the second table including random access configurations defined for FDD (paired spectrum) and / or SUL (supplementary uplink). In the first table and the second table, one PRACH configuration index corresponds to a combination of a random access preamble format, a frame and / or a subframe and / or a slot (such as a PRACH slot) in which an RO is located, a starting symbol of the RO in the PRACH slot, and a number of ROs, and thus the information provides information of the random access preamble format, the frame and / or the subframe and / or the slot (such as the PRACH slot) in which the RO is located, the starting symbol of the RO in the PRACH slot, and the number of ROs by indicating the PRACH configuration index.

[0165] In some embodiments, prach-ConfigurationIndex or prach-ConfigurationIndex-19 indicates whether the PRACH configuration index in the first table or the second table is configured and / or defined and / or indicated, which is exemplified as follows.

[0166] Example 1, configured

[0167] The first UE can be provided with information for indicating whether prach-ConfigurationIndex and / or prach-ConfigurationIndex-19 indicates the PRACH configuration index in the first table or the second table, which is included in the corresponding first indication information, but not limited thereto.

[0168] Example 2, defined

[0169] In rach-ConfigCommon, if the corresponding uplink carrier is in unpaired spectrum, it indicates the PRACH configuration index in the first table; if the corresponding uplink carrier is in paired spectrum or SUL, it indicates the PRACH configuration index in the second table.

[0170] In the first indication information for the first UE, it indicates the PRACH configuration index in the second table, even if the corresponding uplink carrier is in unpaired spectrum.

[0171] prach-ConfigurationIndex-19 indicates the PRACH configuration index in the second table, which is only included even if the corresponding uplink carrier is in unpaired spectrum. For example, it is only included in the first indication information for the first UE.

[0172] Example 3, combined (combination of defined and configured)

[0173] For example, in one first indication information, (if the corresponding uplink carrier is in unpaired spectrum,) when the first UE is provided with information for indicating that its prach-ConfigurationIndex indicates the PRACH configuration index in the second table, the prach-ConfigurationIndex in the first indication information indicates the PRACH configuration index in the second table, otherwise, it indicates the PRACH configuration index in the first table from the first table.

[0174] msg1-FDM indicates / represents the number of ROs in the frequency domain, or the number of FDMed ROs within a time interval. PRACH frequency domain resources n RA ∈{0,1,…,M-1}, where M equals the higher-layer parameter msg1-FDM or msgA-RO-FDM (if configured), in ascending order of the initial uplink bandwidth portion during initial access (PRACH frequency resourcesn). RA ∈{0,1,…,M-1},whereMequals the higher-layer parameter msg1-FDM or msgA-RO-FDM if configured, are numbered in increasing order within the initial uplink bandwidth part during initial access). The FDMed RO is continuous in the frequency domain.

[0175] msg1-FrequencyStart indicates / indicates ① the offset of the lowest RO in the frequency domain relative to the lowest PRB (e.g., PRB 0 in the corresponding UL BWP) (as referred to as the first offset offset1), and / or ② the offset of the lowest RO in the frequency domain relative to the lowest PRB (e.g., PRB 0 in the corresponding UL BWP) in the UL usable PRBs (as referred to as the second offset offset2).

[0176] The resource configuration described above is explained below with reference to the accompanying drawings.

[0177] Case 1: For RO located at any symbol, msg1-FrequencyStart has the same meaning.

[0178] (1)msg1-FrequencyStart indicates / indicates ① the offset (offset1) of the lowest RO in the frequency domain relative to the lowest PRB (such as PRB 0) in the corresponding UL BWP;

[0179] As shown in Figure 7A, for an RO located at any position, such as a symbol located at DL, F (i.e., flexible), UL, a symbol across DL and F, a symbol across F and UL, etc., the offset of the lowest RO in the frequency domain relative to the lowest PRB (in the corresponding UL BWP (i.e., the UL BWP where the RO is located) is offset1, such as Msg1-Frequencystart indicating / indicating offset1.

[0180] (2) msg1-FrequencyStart indicates / represents the offset2 of the lowest PRB (e.g. PRB 0) in the UL usable PRBs relative to the lowest RO in the frequency domain (in the corresponding UL BWP);

[0181] As shown in FIG. 7B, for the RO located in the SBFD symbol, such as the RO located in any position of the symbol of DL, F, UL, the symbol across DL and F, the symbol across F and UL, etc., the offset of the lowest PRB in the UL usable PRBs relative to the lowest RO in the frequency domain (in the corresponding UL BWP (i.e. the UL BWP where the RO is located)) is offset2, which is indicated / represented by msg1-FrequencyStart.

[0182] Case 2, for the RO located in different symbols, the meaning of msg1-FrequencyStart is different.

[0183] (1) For the RO located in the DL SBFD symbol, it represents ②; for other ROs, it represents ①, which is illustrated as follows.

[0184] Example 2-1, as shown in FIG. 7C, for the RO with all resources located in the DL SBFD symbol, msg1-FrequencyStart represents ②; for the RO located in other positions, msg1-FrequencyStart represents ①.

[0185] Example 2-2, as shown in FIG. 7D, for the RO with at least part of the resources located in the DL SBFD symbol, msg1-FrequencyStart represents ②; for other ROs, msg1-FrequencyStart represents ①.

[0186] Example 2-3, as shown in FIG. 7E, for the RO with at least part of the resources located in (or at least part of them located in) the DL SBFD symbol and not located in (or no resources located in or no resources located in) the Full-DL symbol, msg1-FrequencyStart represents ②; for other ROs, msg1-FrequencyStart represents ①.

[0187] (2) For the RO located in the DL symbol, it represents ②; for other ROs, it represents ①, which is illustrated as follows.

[0188] Example 2-4, as shown in FIG. 7F, for the RO with all resources located in the DL symbol, msg1-FrequencyStart represents ②; for other ROs, it represents ①.

[0189] Example 2-5, as shown in FIG. 7G, msg1-FrequencyStart indicates ② for ROs at least partially located within DL symbols; and indicates ① for other ROs.

[0190] In addition, as shown in FIGs. 7A-7G, the number of ROs in frequency domain is 2, i.e., msg1-FDM = 2, but not limited thereto. As shown, offset 2 and offset 1 include the same number of PRBs as offset 1, but not limited thereto. The above is described by taking msg1-FrequencyStart as an example of indication information, but not limited thereto. The above is a specific example of embodiments of the present application, but not limited thereto.

[0191] Case 3, msg1-FrequencyStart does not indicate for ROs located in partial symbols.

[0192] For example, for ROs located in DL symbols and / or DL SBFD symbols, the position of the lowest RO in frequency domain is predefined, e.g., the offset of the lowest PRB of the lowest RO in frequency domain (in the UL usable PRBs in the corresponding UL BWP (i.e., the UL BWP in which the RO is located)) is predefined, e.g., the offset is 0, that is, the lowest RO in frequency domain starts from the lowest PRB of the UL usable PRBs.

[0193] In some embodiments, the examples described above in FIGs. 7A-7G can be applicable to different cases. For example, the above cases 2 or 3 are only applicable when all SBFD symbols are configured within downlink symbols (or all SBFD symbols are configured / instructed by tdd-UL-DL-ConfigurationCommon as downlink) and / or the configured ROs do not include ROs located within SBFD symbols within flexible symbols. For example, when all SBFD symbols are configured within downlink symbols, the method in case 2 or 3 can be used, otherwise the method in case 1 is used, but not limited thereto.

[0194] In some embodiments, the ROs configured by msg1-FrequencyStart and msg1-FDM (located in Flexible SBFD) should be within the corresponding UL usable PRBs (of the corresponding UL BWP), or the UE expects the ROs configured by msg1-FrequencyStart and msg1-FDM (located in Flexible SBFD) to be within the corresponding UL usable PRBs (of the corresponding UL BWP).

[0195] In some embodiments, the first indication information can further comprise information indicating the applicable random access features and / or UE types. For example, the information comprises information indicating / specifying a list of preamble partitions, e.g., featureCombinationPreamblesList-r17, each of which is associated with a feature or feature combination, but not limited thereto. For example, the featureCombinationPreamblesList-r17 comprises one or more FeatureCombinationPreambles-r17.

[0196] In some embodiments, when the terminal device is not provided with the common uplink-downlink configuration information, the first valid RO starts after at least a first time interval after the last SSB and after the SSBs in the PRACH slot in which it is located; and / or,

[0197] When the terminal device is provided with the common uplink-downlink configuration information, the first valid RO is within the uplink time domain resource; or the first valid RO starts after a first time interval after the last downlink time domain resource and after a second time interval after the last SSB. In some embodiments, the second valid RO:

[0198] entirely within the second frequency domain resource (uplink available resource) or the first frequency domain resource (uplink sub-band) (determined according to the (cell-specific) first frequency domain resource); and / or,

[0199] does not overlap with the SSB; and / or,

[0200] does not precede the SSB in the PRACH slot in which it is located; and / or,

[0201] starts after at least a third time interval (the same as or different from the values of the first and second time intervals described above) after (preceding) the last SSB; and / or,

[0202] ends before at least a fourth time interval (the same as or different from the values of the first and second time intervals described above) after (preceding) the first SSB; and / or,

[0203] entirely within the downlink time domain resource (DL SBFD symbol) overlapping with the first time domain resource; and / or,

[0204] does not overlap with downlink time domain resources (Full-DL symbols) that do not overlap with the first time domain resources; and / or,

[0205] starts after at least a fifth time interval after (before) the last downlink time domain resource (Full-DL symbol) that does not overlap with the first time domain resources (after); and / or,

[0206] ends before at least a sixth time interval before (after) the first downlink time domain resource (Full-DL symbol) that does not overlap with the first time domain resources; and / or,

[0207] does not overlap with flexible time domain resources (flexible SBFD symbols) that overlap with the first time domain resources; and / or,

[0208] ends before at least a seventh time interval before (after) the first flexible time domain resource (Flexible SBFD symbol) that overlaps with the first time domain resources; and / or,

[0209] does not overlap with flexible time domain resources (Flexible symbols); and / or,

[0210] ends before at least an eighth time interval before (after) the first flexible time domain resource (Flexible symbol); and / or,

[0211] does not overlap with uplink time domain resources (UL symbols) or (uplink time domain resources (Full-UL symbols) that do not overlap with the first time domain resources, equivalently); and / or,

[0212] ends before at least a ninth time interval before (after) the first uplink time domain resource (UL symbol); and / or,

[0213] does not overlap with flexible time domain resources (Full-flexible symbols) that do not overlap with the first time domain resources; and / or,

[0214] ends before at least a tenth time interval before (after) the first flexible time domain resource (Full-flexible symbol) that does not overlap with the first time domain resources; and / or,

[0215] does not overlap with second time domain resources (non-SBFD symbols); and / or,

[0216] starts after at least an eleventh time interval after (before) the last second time domain resource (non-SBFD symbol); and / or,

[0217] ends before the at least twelfth time interval before (the first second time domain resource (non-SBFD symbol) after) the first time domain resource; and / or

[0218] overlaps with multiple of flexible time domain resources (Flexible SBFD symbols) that do not overlap with the first time domain resource and flexible time domain resources (Full-Flexible symbols) that do not overlap with the first time domain resource and flexible time domain resources (Flexible symbols) and uplink time domain resources (UL symbols); and / or

[0219] does not overlap with the third RO; and / or

[0220] does not overlap with the thirteenth time interval between the first time domain resource and the second time domain resource.

[0221] It can be known from the above embodiments that the second valid RO is a RO that meets / at least one of the above conditions. The above conditions are only specific examples of the present application, and the embodiments of the present application are not limited to the above conditions. Any other conditions can be included according to actual conditions, and will not be listed one by one here.

[0222] In some embodiments, the third RO corresponds to another first indication information (i.e., is configured by another first indication information) and / or the third RO and the RO configured by the first indication information corresponding to the second valid RO adopt the same or different random access preamble format (preamble format) and random access subcarrier spacing (PRACH SCS), and / or the third RO is a valid RO and / or is associated with an SSB.

[0223] In some embodiments, the values of different time intervals among the first to twelfth time intervals can be the same or different.

[0224] In some embodiments, the terminal device can determine the second valid RO corresponding to the first indication information (or determine the valid RO in the second RO, i.e., the second valid RO) and / or the RO configured by the first indication information includes the second valid RO (for example, (for the first UE) only includes the second valid RO or includes the first valid RO and the second valid RO). Wherein, the terminal device determines the second valid RO under a preset condition and / or the RO configured by the first indication information includes the second valid RO only under a preset condition, for example, in the case of satisfying the preset condition (the first case), the terminal device determines the second valid RO and / or the RO configured by the first indication information includes the second valid RO.

[0225] In some embodiments, the preset condition can include at least one of the following conditions:

[0226] The cell supports SBFD; and / or

[0227] The terminal device is provided with information indicating that the cell supports SBFD; and / or

[0228] The cell only allows first terminal devices to access; and / or

[0229] The terminal device is provided with information indicating that the cell only allows first terminal devices to access; and / or

[0230] The cell is configured with (cell-specific) first time domain resources and / or is configured with (cell-specific) first time domain resources in downlink time domain resources; and / or

[0231] The terminal device is provided with information indicating (cell-specific) first time domain resources of the cell; and / or

[0232] The cell is configured with (cell-specific) second frequency domain resources (uplink available resources) and / or (cell-specific) first frequency domain resources (uplink sub-band); and / or

[0233] The terminal device is provided with information indicating (cell-specific) second frequency domain resources (uplink available resources) and / or (cell-specific) first frequency domain resources (uplink sub-band);

[0234] The second frequency domain resources (uplink available resources) determined according to the (cell-specific) first frequency domain resources (uplink sub-band) are included in the corresponding UL BWP of the first indication information; and / or

[0235] The terminal device is provided with common uplink-downlink configuration information of the cell; and / or

[0236] The cell is configured with downlink time domain resources by the common uplink-downlink configuration information; and / or

[0237] The terminal device is a first terminal device; and / or

[0238] The terminal device supports using ROs located in downlink time domain resources and / or located in downlink time domain resources overlapping with the first time domain resources and / or located in the first time domain resources for random access; and / or

[0239] The cell allows using ROs located in downlink time domain resources and / or located in downlink time domain resources overlapping with the first time domain resources and / or located in the first time domain resources for random access; and / or

[0240] The terminal device is provided with information indicating that the cell allows using ROs located in downlink time domain resources and / or located in downlink time domain resources overlapping with the first time domain resources and / or located in the first time domain resources for random access; and / or

[0241] The terminal device is provided with information indicating that the terminal device is allowed to use the RO located in the downlink time domain resource and / or located in the downlink time domain resource overlapping with the first time domain resource and / or located in the first time domain resource for random access; and / or

[0242] The terminal device is provided with information indicating that the RO configured by the first indication information includes the second valid RO; and / or

[0243] The terminal device is provided with information indicating that the (second valid RO corresponding to the first indication information) is enabled; and / or

[0244] The terminal device is provided with information indicating that the terminal device determines and / or uses the second valid RO (corresponding to the first indication information); and / or

[0245] The terminal device is provided with information indicating that the terminal device determines that the second RO (corresponding to the first indication information) is valid and / or invalid.

[0246] In some embodiments, the above-mentioned preset conditions can be indicated / configured / defined, but are not limited thereto.

[0247] As can be seen from the above embodiments, in the case where the above-mentioned preset conditions are met (such as in the first case), the terminal device determines the second valid RO corresponding to the first indication information, and the above-mentioned preset conditions can be at least one of the above-mentioned listed conditions, i.e., any combination, but are not limited to the above-mentioned conditions, and the above-mentioned are only specific examples of the embodiments of the present application, but the embodiments of the present application are not limited thereto, and any other conditions can also be included according to the actual situation, which will not be listed one by one here.

[0248] In some embodiments, for the second RO located in the downlink time domain resource overlapping with the first time domain resource and / or the flexible time domain resource overlapping with the first time domain resource (in the RO configured by the first indication information), the second RO is valid (the valid second RO is the second valid RO) in the above-mentioned first case and / or the following second case, and the second case includes:

[0249] The second RO is (completely) within the second frequency domain resource (uplink available resource) or the (cell-specific) first frequency domain resource (uplink sub-band) determined according to the (cell-specific) first frequency domain resource; and / or,

[0250] It does not overlap with the SSB; and / or,

[0251] It is not before the SSB in the PRACH slot where it is located; and / or,

[0252] starts after at least a third time interval (same or different from the values of the first and second time intervals above) after (before) the last SSB (after) that precedes (follows); and / or,

[0253] ends before at least a fourth time interval (same or different from the values of the first and second time intervals above) before (after) the first SSB (after) that precedes (follows); and / or,

[0254] is (fully) within the downlink time-domain resources that overlap with the first time-domain resources (DL SBFD symbols); and / or,

[0255] does not overlap with the downlink time-domain resources that do not overlap with the first time-domain resources (Full-DL symbols); and / or,

[0256] starts after at least a fifth time interval (same or different from the values of the first, second, third, and fourth time intervals above) after (before) the last downlink time-domain resource (Full-DL symbol) that does not overlap with the first time-domain resources (before) that precedes (after) that follows; and / or,

[0257] ends before at least a sixth time interval (same or different from the values of the first, second, third, fourth, and fifth time intervals above) before (after) the first downlink time-domain resource (Full-DL symbol) that does not overlap with the first time-domain resources (after) that precedes (before) that follows; and / or,

[0258] does not overlap with the flexible time-domain resources that overlap with the first time-domain resources (Flexible SBFD symbols); and / or,

[0259] ends before at least a seventh time interval (same or different from the values of the first, second, third, fourth, fifth, and sixth time intervals above) before (after) the first flexible time-domain resource (Flexible SBFD symbol) that overlaps with the first time-domain resources (after) that precedes (before) that follows; and / or,

[0260] does not overlap with the flexible time-domain resources (Flexible symbols); and / or,

[0261] ends before at least an eighth time interval (same or different from the values of the first, second, third, fourth, fifth, sixth, and seventh time intervals above) before (after) the first flexible time-domain resource (Flexible symbol) that precedes (follows); and / or,

[0262] does not overlap with the uplink time-domain resources (UL symbols) or (does not overlap with the uplink time-domain resources that do not overlap with the first time-domain resources (Full-UL symbols); and / or,

[0263] ends before at least a ninth time interval (same or different from the values of the first, second, third, fourth, fifth, sixth, seventh, and eighth time intervals above) before (after) the first uplink time-domain resource (UL symbol) that precedes (follows); and / or,

[0264] does not overlap with the flexible time-domain resources that do not overlap with the first time-domain resources (Full-flexible symbols); and / or,

[0265] ends before the at least tenth time interval before (after) the first flexible time domain resource (Full-flexible symbol) that does not overlap with the first time domain resource; and / or,

[0266] does not overlap with the second time domain resource (non-SBFD symbol); and / or,

[0267] starts after the at least eleventh time interval after (before) the last second time domain resource (non-SBFD symbol); and / or,

[0268] ends before the at least twelfth time interval before (after) the first second time domain resource (non-SBFD symbol); and / or,

[0269] does not overlap with multiple of the flexible time domain resource (Flexible SBFD symbol) that overlaps with the first time domain resource and the flexible time domain resource (Full-Flexible symbol) that does not overlap with the first time domain resource and the flexible time domain resource (Flexible symbol) and the uplink time domain resource (UL symbol); and / or,

[0270] does not overlap with the third RO, and / or

[0271] does not overlap with the thirteenth time interval between the first time domain resource and the second time domain resource.

[0272] In some embodiments, the third RO is as described above, which will not be repeated here.

[0273] As can be seen from the above embodiments, in the above first case and / or second case, the terminal device determines that the second RO is valid, and the above second case is as described above, but is not limited to the conditions listed above, and the above is only a specific example of the embodiments of the present application, but the embodiments of the present application are not limited thereto, and can also include any other conditions according to actual conditions, which will not be listed one by one here.

[0274] The following illustrates a method of determining that the second RO is valid. In the following example, the case 1 (refer to FIG. 7) is taken as an example for illustration, but the determination method can also be applied to the case 2 (refer to FIG. 7), which will not be listed one by one here.

[0275] Example 1: When the terminal device is provided with information for indicating the enabling of the second valid RO (corresponding to the first case), an RO located in the DL SBFD symbol is valid under the following conditions (corresponding to the second case) (otherwise invalid):

[0276] (1) (completely) within the DL SBFD symbols;

[0277] (2) (completely) within the UL usable RBs (or UL subband).

[0278] Figure 8A is a schematic diagram of resource configuration of an embodiment of the present application, as shown in Figure 8A, wherein the second valid RO (second valid RO) includes the valid RO in the RO located in the DL SBFD symbols determined according to the method described in Example 1.

[0279] Example 2: When the terminal device is provided with information for indicating enabling the second valid RO (corresponding to the first case) (corresponding to the first case) corresponding to the first indication information), one RO located in the DL SBFD symbols is valid (otherwise invalid) under the following conditions (corresponding to the second case):

[0280] (1) (completely) within the DL SBFD symbols;

[0281] (2) (completely) within the UL usable RBs (or UL subband).

[0282] (3) does not overlap with SSB.

[0283] Figure 8B is a schematic diagram of resource configuration of an embodiment of the present application, as shown in Figure 8B, wherein the second valid RO (second valid RO) includes the valid RO in the RO located in the DL SBFD symbols determined according to the method described in Example 2.

[0284] Example 3: When the terminal device is provided with information for indicating enabling the second valid RO (corresponding to the first case) (corresponding to the first case) corresponding to the first indication information), one RO located in the DL SBFD symbols is valid (otherwise invalid) under the following conditions:

[0285] (1) (completely) within the DL SBFD symbols, or the RO is partially within the DL SBFD symbols and partially within the Flexible SBFD symbols;

[0286] (2) (completely) within the UL usable RBs (or UL subband).

[0287] Figure 8C is a schematic diagram of resource configuration of an embodiment of the present application, as shown in Figure 8C, wherein the second valid RO (second valid RO) includes the valid RO in the RO located in the DL SBFD symbols determined according to the method described in Example 3.

[0288] Example 4: When the terminal device is provided with information indicating enabling the second valid RO (corresponding to the first case), one RO located in DL SBFD symbols is valid (otherwise invalid) under the following conditions (corresponding to the second case):

[0289] (1) (completely) within DL SBFD symbols, or the RO is partially in DL SBFD symbols and partially in Flexible SBFD symbols;

[0290] (2) (completely) within UL usable RBs (or UL subband);

[0291] (3) does not overlap with SSB.

[0292] FIG. 8D is a schematic diagram of resource configuration according to an embodiment of the present application, as shown in FIG. 8D, wherein the second valid RO includes the valid RO in the RO located in DL SBFD symbols determined according to the method described in Example 4.

[0293] Example 5: When the terminal device is provided with information indicating enabling the second valid RO (corresponding to the first case), one RO located in DL SBFD symbols is valid (otherwise invalid) under the following conditions (corresponding to the second case):

[0294] (1) does not overlap with Full-DL symbols;

[0295] (2) (completely) within UL usable RBs (or UL subband).

[0296] FIG. 8E is a schematic diagram of resource configuration according to an embodiment of the present application, as shown in FIG. 8E, wherein the second valid RO includes the valid RO in the RO located in DL SBFD symbols determined according to the method described in Example 5.

[0297] Example 6: When the terminal device is provided with information indicating enabling the second valid RO (corresponding to the first case), one RO located in DL SBFD symbols is valid (otherwise invalid) under the following conditions (corresponding to the second case):

[0298] (1) does not overlap with Full-DL symbols;

[0299] (2) (completely) within UL usable RBs (or UL subband).

[0300] (3) does not overlap with an SSB (e.g., SS / PBCH blocks indicated by ssb-PositionsInBurst in SIB1 or by ssb-PositionsInBurst in ServingCellConfigCommon).

[0301] FIG. 8F is a schematic diagram of resource configuration according to an embodiment of the present application, as shown in FIG. 8F, wherein the second valid RO includes the valid RO in the RO of the DL SBFD symbols determined according to the method described in Example 6.

[0302] It should be noted that the first case described in Examples 1 to 6 can not be included, and the present application is not limited in this regard.

[0303] As can be seen from the above examples, the second RO is valid in the above-mentioned first case and / or second case, and the items included in the above-mentioned first case and second case are not limited thereto, and any other item can be included according to the actual situation, which will not be listed one by one here.

[0304] In some embodiments, in a case opposite to the first case (third case) and / or a case opposite to the second case (fourth case), the second RO located in / downlink time domain resources overlapping with the first time domain resources and / or flexible time domain resources overlapping with the first time domain resources is invalid.

[0305] For example, the third case is as follows:

[0306] The cell does not support SBFD; and / or

[0307] The terminal device is not provided with information indicating that the cell supports SBFD; and / or

[0308] The cell allows access by a second terminal device; and / or

[0309] The terminal device is not provided with information indicating that the cell only allows access by a first terminal device; and / or

[0310] The cell is not configured with (cell-specific) first time domain resources and / or is configured with (cell-specific) first time domain resources in downlink time domain resources; and / or

[0311] The terminal device is not provided with information indicating the (cell-specific) first time domain resources of the cell; and / or

[0312] The cell is not configured with (cell-specific) second frequency domain resources (uplink available resources) and / or (cell-specific) first frequency domain resources (uplink sub-band); and / or

[0313] The terminal device is not provided with information indicating (cell-specific) second frequency domain resources (uplink available resources) and / or (cell-specific) first frequency domain resources (uplink sub-band);

[0314] The second frequency domain resources (uplink available resources) determined according to (cell-specific) first frequency domain resources (uplink sub-band) are not included in the corresponding UL BWP of (the first indication information); and / or

[0315] The terminal device is not provided with common uplink-downlink configuration information of the cell; and / or

[0316] The cell is not configured with downlink time domain resources by common uplink-downlink configuration information; and / or

[0317] The terminal device is not a first terminal device; and / or

[0318] The terminal device does not support using ROs located in downlink time domain resources and / or located in downlink time domain resources overlapping with first time domain resources and / or located in first time domain resources for random access; and / or

[0319] The cell does not allow using ROs located in downlink time domain resources and / or located in downlink time domain resources overlapping with first time domain resources and / or located in first time domain resources for random access; and / or

[0320] The terminal device is not provided with information indicating that the cell allows using ROs located in downlink time domain resources and / or located in downlink time domain resources overlapping with first time domain resources and / or located in first time domain resources for random access; and / or

[0321] The terminal device is not provided with information indicating that the terminal device is allowed to use ROs located in downlink time domain resources and / or located in downlink time domain resources overlapping with first time domain resources and / or located in first time domain resources for random access; and / or

[0322] The terminal device is not provided with information indicating that the RO configured by (the first indication information) includes a second valid RO; and / or

[0323] The terminal device is not provided with information indicating enabling the (second valid RO corresponding to the first indication information); and / or

[0324] The terminal device is not provided with information indicating that the terminal device determines (the second valid RO corresponding to the first indication information) and / or uses the second valid RO; and / or

[0325] The terminal device is not provided with information for indicating that the terminal device determines that a second RO (to which the first indication information corresponds) is valid and / or invalid.

[0326] For example, the fourth case is as follows:

[0327] (Not completely) within the second frequency domain resource (uplink available resource) (determined according to the (cell-specific) first frequency domain resource) or the (cell-specific) first frequency domain resource (uplink sub-band); and / or,

[0328] Overlapping with the SSB; and / or,

[0329] Before the SSB in the PRACH slot in which it is located; and / or,

[0330] Start within a third time interval (the same as or different from the values of the first and second time intervals described above) after (the last SSB before it); and / or,

[0331] End within a fourth time interval (the same as or different from the values of the first and second time intervals described above) before (the first SSB after it); and / or,

[0332] Not (completely) within the downlink time domain resource (DL SBFD symbol) that overlaps with the first time domain resource; and / or,

[0333] Overlapping with the downlink time domain resource (Full-DL symbol) that does not overlap with the first time domain resource; and / or,

[0334] Start within a fifth time interval after (the last downlink time domain resource (Full-DL symbol) before it) that does not overlap with the first time domain resource; and / or,

[0335] End within a sixth time interval before (the first downlink time domain resource (Full-DL symbol) after it) that does not overlap with the first time domain resource; and / or,

[0336] Overlapping with the flexible time domain resource (flexible SBFD symbol) that overlaps with the first time domain resource; and / or,

[0337] End before at least a seventh time interval before (the first flexible time domain resource (Flexible SBFD symbol) after it) that overlaps with the first time domain resource, and / or,

[0338] Overlapping with the flexible time domain resource (Flexible symbol); and / or,

[0339] ends within a ninth time interval before (after) the first flexible time domain resource (Flexible symbol) (after) the first flexible time domain resource (Flexible symbol); and / or,

[0340] overlaps with the uplink time domain resource (UL symbol) or (the uplink time domain resource (Full-UL symbol) that does not overlap with the first time domain resource; and / or,

[0341] ends within an eleventh time interval after (before) the last second time domain resource (non-SBFD symbol) (before) the last second time domain resource (non-SBFD symbol); and / or,

[0342] overlaps with the flexible time domain resource (Full-flexible symbol) that does not overlap with the first time domain resource; and / or,

[0343] ends within a tenth time interval before (after) the first flexible time domain resource (Full-flexible symbol) that does not overlap with the first time domain resource (after) the first flexible time domain resource (Full-flexible symbol) that does not overlap with the first time domain resource; and / or,

[0344] overlaps with the second time domain resource (non-SBFD symbol); and / or,

[0345] starts within an eleventh time interval after (before) the last second time domain resource (non-SBFD symbol) (before) the last second time domain resource (non-SBFD symbol); and / or,

[0346] ends within a twelfth time interval before (after) the first second time domain resource (non-SBFD symbol) (after) the first second time domain resource (non-SBFD symbol); and / or,

[0347] overlaps with multiple ones of the flexible time domain resource (Flexible SBFD symbol) that overlaps with the first time domain resource and the flexible time domain resource (Full-Flexible symbol) that does not overlap with the first time domain resource and the flexible time domain resource (Flexible symbol) and the uplink time domain resource (UL symbol); and / or,

[0348] overlaps with the third RO; and / or

[0349] overlaps with a thirteenth time interval between the first time domain resource and the second time domain resource.

[0350] The third RO is as described above, which will not be repeated here.

[0351] In some embodiments, the SSB comprises: an SS / PBCH block indicated by SSB location information (ssb-PositionsInBurst) in SIB1 or ServingCellConfigCommon; and / or,

[0352] (When the terminal device is not provided with a list of downlink or joint TCI states (dl-OrJointTCI-StateList),) an SS / PBCH block indicated by SSB location information (ssb-PositionsInBurst) in SSB-MTCAdditionalPCI information associated with a physical cell ID (the physical cell ID has an activated TCI state for PDCCH or PDSCH); and / or

[0353] (SS / PBCH blocks) configured for L1 beam measurement and / or reporting; and / or,

[0354] (SS / PBCH blocks) configured for intra-frequency RRM measurement; and / or,

[0355] (SS / PBCH blocks) configured for inter-frequency RRM measurement.

[0356] In some embodiments, the method can further comprise (not shown in the figure): receiving related information, the related information comprising at least one of the following information:

[0357] receiving information indicating that the cell supports SBFD; and / or

[0358] receiving information indicating (cell-specific) first time domain resources of the cell; and / or

[0359] receiving information indicating first frequency domain resources and / or second frequency domain resources; and / or

[0360] receiving common uplink-downlink configuration information (for the cell); and / or

[0361] receiving information indicating that the cell allows random access using ROs located in downlink time domain resources and / or located in downlink time domain resources overlapping with the first time domain resources and / or flexible time domain resources overlapping with the first time domain resources; and / or

[0362] receiving information indicating that the terminal device is allowed to use ROs located in downlink time domain resources and / or in downlink time domain resources overlapping with the first time domain resources and / or flexible time domain resources overlapping with the first time domain resources for random access; and / or

[0363] receiving information indicating that the valid ROs (corresponding to the first indication information) include second valid ROs; and / or

[0364] receiving information indicating that the (corresponding to the first indication information) second valid ROs are enabled; and / or

[0365] receiving information indicating that the terminal device determines the (corresponding to the first indication information) second valid ROs; and / or

[0366] receiving information indicating that the (corresponding to the first indication information) specific ROs are valid and / or invalid; and / or

[0367] receiving information indicating that PRACH is allowed and / or not allowed to be sent in SSB symbols, and / or,

[0368] receiving information indicating that PRACH is allowed and / or not allowed to cross the first time domain resources and the second time domain resources.

[0369] In some embodiments, the information indicating that the (corresponding to the first indication information) specific ROs are valid and / or invalid includes sixth indication information and / or seventh indication information; for example, the sixth indication information (directly and / or indirectly) indicates that the (second) ROs are valid if a specific condition (such as one or more of the conditions listed in the first case and / or the second case) is met. The seventh indication information indicates that the (second) ROs are invalid if a specific condition (such as one or more of the conditions listed in the third case and / or the fourth case) is met.

[0370] In some embodiments, whether the ROs meeting the specific condition corresponding to the sixth indication information are valid or not also depends on other conditions, for example, other conditions listed in the first case and / or the second case or other conditions beyond that, embodiments of the present application are not limited thereto.

[0371] For example, the sixth indication information indicates that the (second) ROs crossing SBFD and non-SBFD symbols are (can be) valid, when the terminal device is provided with the sixth indication information, if a (second) RO crossing SBFD and non-SBFD symbols is (entirely) within the UL usable PRBs and does not overlap with SSB, the RO is valid. When the UE is not provided with the sixth indication information, the (second) ROs crossing SBFD and non-SBFD symbols are invalid.

[0372] For example, the sixth indication information is used to indicate that a (second) RO overlapping with SSB is valid, e.g., when the UE is provided with the sixth indication information, a (second) RO is valid if it is completely within UL usable PRBs. When the UE is not provided with the sixth indication information, a (second) RO is valid if it is completely within UL usable PRBs and does not overlap with SSB.

[0373] For example, the sixth indication information is used to indicate that a (second) RO overlapping with SSB is valid, e.g., when the UE is provided with the sixth indication information, a (second) RO is valid if it is completely within UL usable PRBs. When the UE is not provided with the sixth indication information, a (second) RO is valid if it is completely within UL usable PRBs and does not overlap with SSB.

[0374] For example, the seventh indication information is used to indicate that a (second) RO across (DL) SBFD and non-SBFD symbols is invalid, e.g., when the UE is provided with the seventh indication information, a (second) RO across (DL) SBFD and non-SBFD symbols is invalid. When the UE is not provided with the seventh indication information, a (second) RO across (DL) SBFD and non-SBFD symbols is valid if it is completely within UL usable PRBs and does not overlap with SSB.

[0375] For example, the seventh indication information is used to indicate that a (second) RO overlapping with SSB is invalid, e.g., when the UE is provided with the seventh indication information, a (second) RO overlapping with SSB is invalid. When the UE is not provided with the seventh indication information, a (second) RO overlapping with SSB is valid if it is completely within UL usable PRBs.

[0376] In the embodiment, the method can further include: determining a second valid RO (corresponding to the first indication information) according to the information.

[0377] As known from the above embodiments, the terminal device receives the above information and can determine the validity of RO according to the information, but the received information is not limited thereto and can also include other information according to actual conditions, which will not be listed one by one here.

[0378] In some embodiments, for a first RO (in the RO configured by the first indication information) located in flexible time domain resources and / or uplink time domain resources:

[0379] In the case that the terminal device is not provided with the common uplink-downlink configuration information, the first RO is valid if the first RO is not before the SSB in the PRACH slot where the first RO is located, and the first RO starts after at least a first time interval after the last SSB; and / or,

[0380] In the case that the terminal device is provided with the common uplink-downlink configuration information, the first RO is in the time domain resource of the uplink; or the first RO is not before the SSB in the PRACH slot where the first RO is located, and the first RO starts after a first time interval after the last downlink time domain resource and a second time interval after the last SSB.

[0381] For example, the first valid RO or the valid RO in the first RO is determined by the following method, where the first time interval and the second time interval = N gap symbols:

[0382] As can be seen from the above embodiments, in different cases, i.e., provided with and not provided with the common uplink-downlink configuration information, the first RO is determined to be valid under certain conditions of the first RO, and the judgment condition is not limited to this, but can also include any other conditions according to actual conditions, which will not be listed one by one here.

[0383] In the above embodiments, by using the above method, only the ROs located in the flexible symbols and / or the uplink symbols can be valid ROs, and there is no need to consider the time-frequency domain resource types (such as UL subband, UL usable RBs, SBFD symbols, non-SBFD symbols) related to SBFD when judging whether the RO is valid. For example, for the case that the UE is provided with the common uplink-downlink configuration information, FIG. 9 is a resource configuration diagram of an embodiment of the present application. As shown in FIG. 9, it is assumed that BWP SCS = Preamble SCS = SSB SCS = 15 / 30 kHz. In FIG. 9, among the ROs located in the flexible symbols and / or the uplink symbols, the white ROs are valid ROs (first valid ROs), and the gray ROs do not satisfy the above condition in terms of the position relationship with the SSB / DL symbols, and thus are not valid ROs. In some embodiments, a terminal device only determines the second valid RO (in the RO configured by the first indication information). For example, in the above first case, the first terminal device only determines the second valid RO.

[0384] In some embodiments, a terminal device only determines the first valid RO (in the RO configured by the first indication information). For example, in the above third case, the first terminal device only determines the first valid RO.

[0385] In some embodiments, the method further comprises (not shown in the figures):

[0386] receiving the first information for indicating available random access preambles corresponding to the valid RO (or configured RO) and / or the second information for indicating available random access preambles corresponding to the first valid RO (or first RO) and / or the third information for indicating available random access preambles corresponding to the second valid RO (or second RO).

[0387] In some embodiments, when the terminal device is only provided with the first information, the available random access preambles corresponding to the first valid RO and the second valid RO are the same; and / or, when the terminal device is provided with the second information and / or the third information, the available random access preambles corresponding to the first valid RO and the second valid RO are different.

[0388] In some embodiments, the available random access preambles corresponding to the first valid RO and the second valid RO being the same or different includes the number and / or sequence of the available random access preambles being the same or different.

[0389] In some embodiments, the available random access preambles on one RO include one or more, and different random access preambles are associated with the same or different SSBs.

[0390] In some embodiments, the first information, the second information, and the third information can be included in the first indication information, but are not limited thereto. The specific indication method is as described above, and will not be described here.

[0391] In some embodiments, the first information, the second information, and the third information include information for configuring the number of random access preambles and / or information for configuring the number of random access preambles associated with one SSB (on one RO) and / or information for configuring the starting random access preamble.

[0392] For example, the first information includes: the first information for configuring the number of random access preambles R, such as totalNumberOfRA-Preambles, and / or the first information for configuring the number of ROs N associated with one SSB, such as ssb-perRACH-OccasionAndCB-PreamblesPerSSB, which implicitly indicates the number of random access preambles associated with one SSB on one RO = R / N.

[0393] The second information includes: second information for configuring starting random access preambles, startPreambleForThisPartition and / or second information for configuring a number S of random access preambles associated with one SSB, numberOfPreamblesPerSSB-ForThisPartition; for example, the terminal device maps the SSB to the available random access preambles configured by the second information according to the method of Option 2 described below.

[0394] The third information is different from the first information and the second information. Wherein, the difference includes: the information domain corresponding to the third information is different from the first information and the second information.

[0395] The following describes how the terminal device maps the SSB to the ROs and / or random access preambles.

[0396] In some embodiments, the terminal device obtains the number of SSBs associated with one RO (N) and / or the number of random access preambles associated with one SSB (R / S / T). For example, the terminal device maps the SSB to the ROs according to these parameters. For example, when N < 1, 1 SSB or SSB index is associated with 1 / N ROs, that is, the first 1 / N ROs are associated with the same SSB, and when N > 1 or N = 1, N SSBs or SSB indexes are associated with one RO.

[0397] Option 1:

[0398] (For mapping SSB indexes to first PRACH occasions,)(For Type-1 random access procedure,)a UE is provided a number N of SS / PBCH block indexes associated with one(first)PRACH occasion and a number R of contention based preambles per SS / PBCH block index per(first)valid PRACH occasion by ssb-perRACH-OccasionAndCB-PreamblesPerSSB.

[0399] ((For mapping SSB indexes to first ROs,)(For Type-1 random access procedure,) a UE is provided a number N of associated SSB indexes associated with one (first) valid RO by ssb-perRACH-OccasionAndCB-PreamblesPerSSB and a number R of contention based preambles per SSB index per (first) valid RO by startPreambleForThisPartition and numberOfPreamblesPerSSB-ForThisPartition.

[0400] Option 2:

[0401] (For mapping SSB indexes to first PRACH occasions,)(For a random access procedure associated with a feature combination indicated by FeatureCombinationPreambles,)a UE is provided a number N of SS / PBCH block indexes associated with one(first)PRACH occasion by ssb-perRACH-OccasionAndCB-PreamblesPerSSB and a number S of contention based preambles per SS / PBCH block index per(first)valid PRACH occasion by startPreambleForThisPartition and numberOfPreamblesPerSSB-ForThisPartition.

[0402] ((For mapping SSB indexes to first PRACH occasions,)(For a random access procedure associated with a feature combination indicated by FeatureCombinationPreambles,)ssb-perRACH-OccasionAndCB-PreamblesPerSSB provides a UE a number N of associated SSB indexes associated with one (first) valid RO and startPreambleForThisPartition and numberOfPreamblesPerSSB-ForThisPartition provides a UE a number S of contention based preambles per SSB index per (first) valid RO.)

[0403] For example, for the second valid RO, in addition to the above Option 1 or 2, Option 3 can also be used:

[0404] Option 3:

[0405] (For mapping SSB indexes to second PRACH occasions,)(For a random access procedure associated with a feature combination indicated by FeatureCombinationPreambles,)a UE is provided a number N of SS / PBCH block indexes associated with one(second)PRACH occasion by information different from ssb-perRACH-OccasionAndCB-PreamblesPerSSB and a number S of contention based preambles per SS / PBCH block index per(second)valid PRACH occasion by information different from ssb-perRACH-OccasionAndCB-PreamblesPerSSB,startPreambleForThisPartition and numberOfPreamblesPerSSB-ForThisPartition.

[0406] ((For mapping SSB indexes to the second PRACH occasions,)(For random access procedure associated with feature combination indicated by FeatureCombinationPreambles) different from ssb-perRACH-OccasionAndCB-PreamblesPerSSB, the information provides the UE with the number N of SSB indexes associated with multiple one (second) valid ROs, and different from ssb-perRACH-OccasionAndCB-PreamblesPerSSB, startPreambleForThisPartition and numberOfPreamblesPerSSB-ForThisPartition, the information provides the UE with the number T of contention-based random access preambles associated with one SSB index per (first) valid RO.

[0407] In some embodiments, the method further comprises:

[0408] mapping (respectively) SSBs (or SSB indexes) to the first valid ROs (in the first period) and / or mapping SSBs to the second valid ROs (in the second period).

[0409] In some embodiments, the first period comprises a first mapping cycle and / or a first association period and / or a first association pattern period, and the second period comprises a second mapping cycle and / or a second association period and / or a second association pattern period.

[0410] In some embodiments, the first mapping cycle and / or the first association period and / or the first association pattern period is determined based on the first valid ROs included in the PRACH configuration period, or in other words, the first association period and / or the first association pattern period corresponds to the first valid ROs.

[0411] For example, the first mapping cycle comprises the first (valid) ROs mapped from the first to the last SSB (indexes) in the SS / PBCH block (indexes). For example, the first mapping cycle comprises the first (valid) ROs mapped from the first to the last SSB (indexes) in the SS / PBCH block (indexes).

[0412] For example, the first association period and / or the first association pattern period is defined as follows:

[0413] (To map SSB indexes to first(valid)PRACH occasions,)An(first)association period,starting from frame 0,for mapping SS / PBCH block indexes to(first)PRACH occasions is the smallest value in the set determined by the PRACH configuration period(according Table 8.1-1)such that SS / PBCH block indexes are mapped at least once to the(first(valid))PRACH occasions within the(first)association period,where a UE obtains from the value of ssb-PositionsInBurst in SIB1 or in ServingCellConfigCommon.If after an integer number of SS / PBCH block indexes to(first(valid))PRACH occasions mapping cycles within the(first)association period there is a set of(first(valid))PRACH occasions or PRACH preambles that are not mapped to SS / PBCH block indexes, no SS / PBCH block indexes are mapped to the set of (first (valid)) PRACH occasions or PRACH preambles. An (first) association pattern period includes one or more (first) association periods and is determined so that a pattern between (first (valid)) PRACH occasions and SS / PBCH block indexes repeats at most every 160 msec. (First (valid)) PRACH occasions not associated with SS / PBCH block indexes after an integer number of (first) association periods, if any, are not used for PRACH transmissions.

[0414] ((To map SSB indexes to first (valid) RRACH occasions,) starting from frame 0, a (first) association period for mapping SS / PBCH block indexes to (first) PRACH occasions is the smallest value in the set of PRACH configuration periods (e.g., if PRACH configuration period = 10, the set includes {1, 2, 4, 8, 16} PRACH configuration periods) such that SS / PBCH block indexes are mapped to (first (valid)) PRACH occasions within the (first) association period at least once, where the UE obtains from ssb-PositionsInBurst values in SIB1 or ServingCellConfigCommon (e.g., the number of SSB indexes for which the corresponding bit of ssb-PositionsInBurst is 1). In this (first) association period, if there are integer number of SS / PBCH block indexes to (first (valid)) PRACH occasions mapping period after which there are no SS / PBCH block indexes mapped to If the number of SS / PBCH block indexes is larger than the number of (first (valid)) PRACH occasions or PRACH preamble sets per SS / PBCH block index, then no SS / PBCH block index is mapped to the (first) PRACH occasion or PRACH preamble set. The (first) association pattern period comprises one or more (first) association periods and is such that the pattern between (first (valid)) PRACH occasions and SS / PBCH block indexes repeats at most every 160 ms (that is, the (first) association pattern period is at most 160 ms). (Within the (first) association pattern period), the (first (valid)) PRACH occasions not associated with an SS / PBCH block index (if any) after an integer number of (first) association periods are not used for PRACH transmission.

[0415] Table 8.1-1: Mapping between PRACH configuration period and SS / PBCH block to PRACH occasion association period

[0416] In some embodiments, SSB indexes are mapped to first valid ROs, for example in the following order:

[0417] (To map SSB indexes to first(valid)PRACH occasions,)SS / PBCH block indexes provided by ssb-PositionsInBurst in SIB1 or in ServingCellConfigCommon are mapped to(first)valid PRACH occasions in the following order.

[0418] - First, in increasing order of preamble indexes within a single(first(valid))PRACH occasion

[0419] - Second, in increasing order of frequency resource indexes for frequency multiplexed(first(valid))PRACH occasions

[0420] - Third, in increasing order of time resource indexes for time multiplexed (first (valid)) PRACH occasions within a PRACH slot

[0421] - Fourth, in increasing order of indexes for PRACH slots (containing first (valid) PRACH occasions)

[0422] ((To map SSB indexes to first valid RO indexes,)(SSB indexes provided by ssb-PositionsInBurst in SIB1 or SSB indexes in ServingCellConfigCommon) are mapped to the first valid RO:

[0423] ascending order of random access preambles within one (first (valid)) RO;

[0424] ascending order of frequency resource indexes of frequency multiplexed (first (valid)) ROs;

[0425] ascending order of time resource indexes of time multiplexed (first (valid)) ROs within one PRACH slot;

[0426] ascending order of PRACH timing (containing first (valid) RO) indexes.

[0427] wherein the first valid RO and preamble mapped to one SSB index are determined, for example, in the following way:

[0428] To map SSB indexes to(first(valid))PRACH occasions,)(For Type-1 random access procedure,)if N<1,one SS / PBCH block index is mapped to 1 / N consecutive(first)valid PRACH occasions and R contention based preambles with consecutive indexes associated with the SS / PBCH block index per(first)valid PRACH occasion start from preamble index 0.If N≥1,R contention based preambles with consecutive indexes associated with SS / PBCH block index n,0≤n≤N-1,per(first)valid PRACH occasion start from preamble index where The total number of RA-Preambles (for Type-1 random access procedure) is provided by the total number of RA-Preambles, and is an integer multiple of N. (For Type-1 (i.e., 4-step RA type) random access procedures,) if N < 1, then an SSB index is mapped to 1 / N consecutive (first) valid ROs, and for each (first) valid RO, the R contention-based random access preambles with consecutive indices associated with that SSB start from random access preamble index 0. If N ≥ 1, then for each (first) valid RO, the R contention-based random access preambles with consecutive indices associated with SSB index n (i.e., the nth index, 0 ≤ n ≤ N-1) start from random access preamble index 0. At the beginning, among them, Provided by totalNumberOfRA-Preambles (for Type-1 random access procedure), and is an integer multiple of N.

[0429] In some embodiments, the second association period and / or the second association pattern period is determined based on a second valid RO included in the PRACH configuration period, or in other words, the second association period and / or the second association pattern period corresponds to the second valid RO.

[0430] For example, the second association period and / or the second association pattern period is defined as follows:

[0431] (To map SSB indexes to second(valid)PRACH occasions,)An(second)association period,starting from frame 0,for mapping SS / PBCH block indexes to(second)PRACH occasions is the smallest value in the set determined by the PRACH configuration period(according Table 8.1-1)such that SS / PBCH block indexes are mapped at least once to the(second(valid))PRACH occasions within the(second)association period,where a UE obtains from the value of ssb-PositionsInBurst in SIB1 or in ServingCellConfigCommon.If after an integer number of SS / PBCH block indexes to(second(valid))PRACH occasions mapping cycles within the(second)association period there is a set of(second(valid))PRACH occasions or PRACH preambles that are not mapped to SS / PBCH block indexes, no SS / PBCH block indexes are mapped to the set of (second (valid)) PRACH occasions or PRACH preambles. A (second) association pattern period includes one or more (second) association periods and is determined so that a pattern between (second (valid)) PRACH occasions and SS / PBCH block indexes repeats at most every 160 msec. (Second (valid)) PRACH occasions not associated with SS / PBCH block indexes after an integer number of (second) association periods, if any, are not used for PRACH transmissions.

[0432] ((For mapping SSB indexes to second (valid) RRACH occasions, ) from frame 0, a (second) association period for mapping SS / PBCH block indexes to (second) PRACH occasions is a set of PRACH configuration periods (according to Table 8.1-1) determined by the minimum value of (e.g., = the number of SSB indexes for which the corresponding bit of the ssb-PositionsInBurst indication is 1). Within this (second) association period, if there are If the number of SS / PBCH block indexes is larger than the number of (second (valid)) PRACH occasions or PRACH preamble sets, then no SS / PBCH block index is mapped to the (second) PRACH occasion or PRACH preamble set. The (second) association pattern period comprises one or more (second) association periods and is such that the pattern between (first (valid)) PRACH occasions and SS / PBCH block indexes repeats at most every 160 ms (that is, the (second) association pattern period is at most 160 ms). (Within the (second) association pattern period), the (second (valid)) PRACH occasions not associated with an SS / PBCH block index (if any) after an integer number of (second) association periods are not used for PRACH transmission.

[0433] Table 8.1-1: Mapping between PRACH configuration period and SS / PBCH block to PRACH occasion association period

[0434] In some embodiments, the SSB indexes are mapped to second valid ROs, for example in the following order:

[0435] (To map SSB indexes to second(valid)PRACH occasions,)SS / PBCH block indexes provided by ssb-PositionsInBurst in SIB1 or in ServingCellConfigCommon are mapped to(second)valid PRACH occasions in the following order.

[0436] - First, in increasing order of preamble indexes within a single(second(valid)) PRACH occasion

[0437] - Second, in increasing order of frequency resource indexes for frequency multiplexed(second(valid)) PRACH occasions

[0438] - Third, in increasing order of time resource indexes for time multiplexed (second (valid)) PRACH occasions within a PRACH slot

[0439] - Fourth, in increasing order of indexes for PRACH slots (containing second (valid) PRACH occasions)

[0440] ((To map SSB indexes to first valid RO indexes,)(SSB indexes provided by ssb-PositionsInBurst in SIB1 or SSB indexes in ServingCellConfigCommon) are mapped to the second valid RO:

[0441] - Ascending order of random access preambles within one (second (valid)) RO;

[0442] - Ascending order of frequency resource indexes of frequency multiplexed (second (valid)) ROs;

[0443] - Ascending order of time resource indexes of time multiplexed (second (valid)) ROs within one PRACH slot;

[0444] - Ascending order of PRACH timing (containing second (valid) RO) indexes.

[0445] Wherein the first valid RO and preamble mapped by one SSB index are determined, for example, in the following way:

[0446] (To map SSB indexes to second PRACH occasions,)(For Type-1 random access procedure,) if N<1, one SS / PBCH block index is mapped to 1 / N consecutive (second)valid PRACH occasions and R contention based preambles with consecutive indexes associated with the SS / PBCH block index per(second)valid PRACH occasion start from preamble index 0.If N≥1,R contention based preambles with consecutive indexes associated with SS / PBCH block index n,0≤n≤N-1,per(second)valid PRACH occasion start from preamble index where The total number of RA-Preambles (for Type-1 random access procedure) is provided by the total number of RA-Preambles, and is an integer multiple of N. (For Type-1 (i.e., 4-step RA type) random access procedures,) if N < 1, then an SSB index is mapped to 1 / N consecutive (second) valid ROs, and for each (second) valid RO, the R contention-based random access preambles with consecutive indices associated with that SSB start from random access preamble index 0. If N ≥ 1, then for each (second) valid RO, the R contention-based random access preambles with consecutive indices associated with SSB index n (i.e., the nth index, 0 ≤ n ≤ N-1) start from random access preamble index 0. At the beginning, among them, Provided by totalNumberOfRA-Preambles (for Type-1 random access procedure), and is an integer multiple of N.

[0447] FIG. 10 is a schematic diagram of mapping SSB (index) to RO, where N = 1 is assumed. If white ROs are assumed to be the first valid ROs in the PRACH period (where the second valid ROs are not shown), the periods shown are the first mapping cycle, the first association period, and the first association pattern period, respectively. If white ROs are assumed to be the second valid ROs in the PRACH period (where the first valid ROs are not shown), the periods shown are the second mapping cycle, the second association period, and the second association pattern period, respectively.

[0448] In some embodiments, the random access preamble can be referred to as a random access preamble code, a random access preamble sequence, a preamble, a PRACH preamble.

[0449] By the embodiments of the present application, the method for the terminal device to perform random access is provided, which can support the terminal device to send a random access preamble to a network device in a PRACH resource in flexible time domain resources and / or uplink time domain resources and / or downlink time domain resources overlapping with the first time domain resources and / or flexible time domain resources overlapping with the first time domain resources, that is, support the uplink transmission of random access in the resources in the flexible time domain resources and / or uplink time domain resources, the downlink time domain resources overlapping with the first time domain resources, and / or the flexible time domain resources overlapping with the first time domain resources, so as to increase the coverage, capacity, and reduce the latency of random access.

[0450] The embodiments of the present application provide a random access device. The device can be a terminal device, or can be one or more components or assemblies configured in the terminal device. The same content as the embodiments of the first aspect will not be repeated.

[0451] FIG. 11 is a schematic diagram of the random access device according to the embodiments of the present application. Since the principle of solving the problem of the random access device is the same as that of the method of the embodiments of the first aspect, the specific implementation can refer to the embodiments of the first aspect, and the same content will not be repeatedly described.

[0452] As shown in FIG. 11, the random access device 1100 according to the embodiments of the present application includes:

[0453] A first sending unit 1101, configured to send a random access preamble (PRACH) to a network device in a first valid RO or a second valid RO;

[0454] The first valid RO is located in flexible time domain resources and / or uplink time domain resources, and the second valid RO is located in downlink time domain resources overlapping with the first time domain resources and / or flexible time domain resources overlapping with the first time domain resources.

[0455] It is noticeable that the above Fig. 11 only schematically illustrates the embodiments of the present application, and the present application is not limited thereto. For example, the execution sequence between various operations can be properly adjusted, and in addition, some operations can be added or some operations can be reduced. Those skilled in the art can properly modify based on the above description, and the present application is not limited to the above Fig. 11.

[0456] The implementation of the first sending unit 1101 can refer to 501 of the first aspect, and the repeated parts will not be described herein.

[0457] In addition, the first sending unit 1101 can also be configured to send other messages to the network device. For example, sending a message related to the random access procedure to the network side.

[0458] In some embodiments, the second valid RO does not overlap with the first valid RO.

[0459] In some embodiments, the terminal device is a first terminal device, and the first terminal device has a capability of sending an uplink signal on the first time domain resource and / or a downlink time domain resource overlapping with the first time domain resource and / or a flexible time domain resource overlapping with the first time domain resource.

[0460] In some embodiments, the apparatus 1100 further includes a first receiving unit 1102, configured to receive first indication information (for the cell) used for indicating (cell-specific) random access parameters, the first indication information including information used for configuring a RO.

[0461] In some embodiments, the first indication information is as described in the embodiments of the first aspect, and the content thereof is incorporated herein, and will not be described herein.

[0462] In some embodiments, the RO configured by the first indication information includes the first valid RO and / or the second valid RO.

[0463] In some embodiments, the location (conditions to be met) of the first valid RO and the second valid RO is as described in the embodiments of the first aspect, and will not be described herein.

[0464] In some embodiments, the RO configured by the first indication information includes a first RO and / or a second RO, the first RO is located in a flexible time domain resource and / or an uplink time domain resource, the second RO is located in a downlink time domain resource overlapping with the first time domain resource and / or a flexible time domain resource overlapping with the first time domain resource, and the second RO does not overlap with the first RO.

[0465] In some embodiments, the apparatus 1100 further includes a first processing unit (not shown in the figure) configured to determine a second valid RO (or a valid RO in the second RO, i.e., the second valid RO) corresponding to the first indication information and / or the RO configured by the first indication information includes the second valid RO (e.g., includes only the second valid RO or includes the first valid RO and the second valid RO for the first UE). Wherein the second valid RO is determined under a preset condition and / or the RO configured by the first indication information includes the second valid RO under a preset condition, for example, the second valid RO is determined and / or the RO configured by the first indication information includes the second valid RO under the first condition. The specific determination method and the preset condition are as described in the embodiments of the first aspect, which are incorporated herein and will not be repeated here.

[0466] In some embodiments, the apparatus 1100 further includes a second processing unit (not shown in the figure) configured to determine, for the second RO (in the RO configured by the first indication information) located in the downlink time domain resource overlapping with the first time domain resource and / or the flexible time domain resource overlapping with the first time domain resource, the second RO is valid under the first condition and / or the second condition. Wherein the first condition and the second condition are as described in the embodiments of the first aspect, which are incorporated herein and will not be repeated here.

[0467] In some embodiments, the apparatus 1100 further includes a second receiving unit (not shown in the figure) configured to receive the related information, which is as described in the embodiments of the first aspect and will not be repeated here.

[0468] In some embodiments, the apparatus 1100 further includes a third processing unit (not shown in the figure) configured to determine the second valid RO (corresponding to the first indication information) according to the related information. The determination method is as described in the embodiments of the first aspect, which are incorporated herein and will not be repeated here.

[0469] In some embodiments, the apparatus 1100 further includes a fourth processing unit (not shown in the figure) configured to determine, for the first RO (in the RO configured by the first indication information) located in the flexible time domain resource and / or the uplink time domain resource, the first RO is valid. The specific determination method is as described in the embodiments of the first aspect and will not be repeated here.

[0470] In some embodiments, the apparatus 1100 further includes a second sending unit configured to send, to the terminal device, information indicating that the first indication information configures the ROs, wherein the terminal device is configured to: when the first indication information configures the ROs including the second valid RO, send the random access preamble only in the second valid RO; or, in the same random access procedure, send the random access preamble only in the first valid RO or only in the second valid RO; or, in the same random access procedure, send the random access preamble in the first valid RO and / or the second valid RO.

[0471] In some embodiments, the apparatus 1100 further includes a third receiving unit (not shown in the figure) configured to receive information indicating that a specific RO (corresponding to the first indication information) is valid or invalid. For example, the information includes the sixth indication information and / or the seventh indication information, which are described in the embodiments of the first aspect, and the contents thereof are incorporated herein, and will not be described herein again.

[0472] In some embodiments, the apparatus 1100 further includes a fourth receiving unit (not shown in the figure) configured to receive first information indicating available random access preambles corresponding to the valid ROs (or the configured ROs), and / or second information indicating available random access preambles corresponding to the first valid RO (or the first RO), and / or third information indicating available random access preambles corresponding to the second valid RO (or the second RO).

[0473] In some embodiments, the first information, the second information, and the third information are described in the embodiments of the first aspect, and the contents thereof are incorporated herein, and will not be described herein again.

[0474] In some embodiments, when the terminal device is provided with only the second information, the available random access preambles corresponding to the first valid RO and the second valid RO are the same; and / or,

[0475] When the terminal device is provided with the third information and / or the fourth information, the available random access preambles corresponding to the first valid RO and the second valid RO are different.

[0476] In some embodiments, the apparatus 1100 further includes a fifth processing unit (not shown in the figure) configured to (respectively) map the SSB (or SSB index) to the first valid RO (in the first period) and / or map the SSB to the second valid RO (in the second period).

[0477] In some embodiments, the contents of the SSB and the process of mapping the SSB are described in the embodiments of the first aspect, and will not be described herein again.

[0478] In addition, the above receiving unit can also be configured to receive a message sent by the network device. For example, receiving a message related to the random access procedure sent by the network side.

[0479] In addition, for simplicity, only the connection relationship or signal direction between each component or module is exemplarily shown in FIG. 11, but it should be clear for those skilled in the art that various related technologies such as bus connection can be adopted according to the above description. Each component or module in the above embodiment can be realized by hardware facilities such as processor, memory, transmitter, receiver, etc.; the implementation of the present application is not limited thereto.

[0480] The above embodiments are only exemplarily described for the embodiments of the present application, but the present application is not limited thereto, and appropriate modifications can be made on the basis of the above embodiments. For example, each of the above embodiments can be used alone, or one or more of the above embodiments can be combined.

[0481] Embodiments of the third aspect

[0482] The embodiments of the present application provide a random access method, which is described from the network device side. The same content as the embodiments of the first aspect will not be described herein again.

[0483] FIG. 12 is a schematic diagram of a random access method according to an embodiment of the present application. As shown in FIG. 12, the method comprises the following steps.

[0484] 1201, receiving a random access preamble in the first valid RO or the second valid RO;

[0485] The first valid RO is located in flexible time domain resources and / or uplink time domain resources, and the second valid RO is located in downlink time domain resources overlapping with the first time domain resources.

[0486] It should be noted that the above FIG. 12 only exemplarily describes the embodiments of the present application, but the present application is not limited thereto. For example, the execution order between each operation can be appropriately adjusted, and in addition, some operations can be added or some operations can be reduced. Those skilled in the art can make appropriate modifications according to the above description, and the present application is not limited to the description of the above FIG. 12.

[0487] The implementation of 1201 can refer to 501 of the first aspect, and the repeated parts will not be described herein again.

[0488] In some embodiments, the method can further comprise: receiving a random access preamble sent by the first terminal device in the first valid RO and / or the second valid RO; and / or receiving a random access preamble sent by the second terminal device in the first valid RO.

[0489] In some embodiments, the first terminal device and the second terminal device are as described in the embodiments of the first aspect, and will not be described herein again.

[0490] In some embodiments, the locations of the first valid RO and the second valid RO are as described in the embodiments of the first aspect, which will not be repeated here. The method of determining the first RO and the second RO to be valid is as described in the embodiments of the first aspect, which will not be repeated here.

[0491] In some embodiments, the method can further include: (to the terminal device) sending first indication information for configuring random access parameters, the RO configured by the first indication information including the first valid RO and / or the second valid RO, the second valid RO not being used for the second terminal device to send a random access preamble.

[0492] In some embodiments, the first indication information is as described in the embodiments of the first aspect, the content of which is incorporated herein, which will not be repeated here.

[0493] In some embodiments, the method can further include: (to the terminal device) sending relevant information for determining the first valid RO and / or the second valid RO, so that the terminal device determines the first valid RO and / or the second valid RO (corresponding to the first indication information) according to the relevant information, and / or, the valid RO determined (corresponding to the first indication information) includes the first valid RO and / or the second valid RO.

[0494] In some embodiments, the relevant information is as described in the embodiments of the first aspect, the content of which is incorporated herein, which will not be repeated here.

[0495] In some embodiments, the method can further include: (to the terminal device) sending first information for indicating available random access preambles corresponding to the valid RO and / or second information for indicating available random access preambles corresponding to the first valid RO and / or third information for indicating available random access preambles corresponding to the second valid RO.

[0496] The above only describes the steps or processes related to the present application, but the present application is not limited thereto. The method of the embodiments of the present application can also include other steps or processes, and the specific content of these steps or processes can be referred to the related art.

[0497] The above embodiments only exemplarily describe the embodiments of the present application, but the present application is not limited thereto, and can be appropriately modified on the basis of the above embodiments. For example, the above embodiments can be used alone, or one or more of the above embodiments can be combined.

[0498] Embodiments of the fourth aspect

[0499] The embodiment of the present application provides a random access device. The device can be a network device, or can be one or more components or assemblies configured in the network device. The same content as the embodiment of the third aspect will not be described herein.

[0500] FIG. 13 is a schematic diagram of the random access device according to the embodiment of the present application. Since the principle of solving the problem of the random access device is the same as that of the method of the embodiment of the third aspect, the specific implementation can refer to the embodiment of the third aspect, and the same content will not be described herein.

[0501] As shown in FIG. 13, the device 1300 includes a first receiving unit 1301 configured to receive a random access preamble in a first valid RO and / or a second valid RO. The first valid RO is located in a flexible time domain resource and / or an uplink time domain resource, and the second valid RO is located in a downlink time domain resource overlapping with the first time domain resource and / or a flexible time domain resource overlapping with the first time domain resource.

[0502] In some embodiments, the device 1300 further includes a first sending unit 1302 configured to send (to a terminal device) first indication information for configuring random access parameters. The RO configured by the first indication information includes the first valid RO and / or the second valid RO. The second valid RO is not used for the second terminal device to send a random access preamble.

[0503] In some embodiments, the device 1300 further includes a second receiving unit (not shown in the figure) configured to receive a random access preamble sent by the first terminal device in the first valid RO and / or the second valid RO; and / or, receive a random access preamble sent by the second terminal device in the first valid RO.

[0504] In some embodiments, the device 1300 can further include a second sending unit (not shown in the figure) configured to send (to a terminal device) related information for determining the first valid RO and / or the second valid RO, so that the terminal device determines the first valid RO and / or the second valid RO (corresponding to the first indication information) according to the related information, and / or, determines that the valid RO (corresponding to the first indication information) includes the first valid RO and / or the second valid RO. The related information is as described in the embodiment of the first aspect, which will not be described herein.

[0505] In some embodiments, the device 1300 further includes a third sending unit (not shown in the figure) configured to send (to a terminal device) first information for indicating available random access preambles corresponding to the valid RO, and / or second information for indicating available random access preambles corresponding to the first valid RO, and / or third information for indicating available random access preambles corresponding to the second valid RO. In some embodiments, the device 1300 further includes a third sending unit (not shown in the figure) configured to send (to a terminal device) first information for indicating available random access preambles corresponding to the valid RO, and / or second information for indicating available random access preambles corresponding to the first valid RO, and / or third information for indicating available random access preambles corresponding to the second valid RO.

[0506] In some embodiments, the location of the first valid RO and / or the second valid RO, and the first RO and / or the second RO validity determination are as described in Embodiment 1, the content of which is incorporated herein, and will not be repeated here.

[0507] It is worth noting that the above only describes the components or modules related to the present application, but the present application is not limited thereto. The random access apparatus 1300 of the embodiments of the present application can also include other components or modules, and the specific content of these components or modules can be referred to the related art.

[0508] In addition, for the sake of simplicity, only the connection relationship or signal path between the components or modules is exemplarily shown in FIG. 13, but it should be clear to those skilled in the art that various related technologies such as bus connection can be used. The above components or modules can be realized by hardware facilities such as processors, memories, transmitters, receivers, etc.; the present application is not limited thereto.

[0509] The above embodiments of the present application are only exemplarily described, but the present application is not limited thereto, and appropriate modifications can be made on the basis of the above embodiments. For example, the above embodiments can be used alone, or one or more of the above embodiments can be combined.

[0510] Embodiments of the fifth aspect

[0511] The embodiments of the present application also provide a communication system, which can be referred to FIG. 1, and the same content as the embodiments of the first to fourth aspects will not be repeated.

[0512] In some embodiments, the communication system 100 can at least include: a network device 101 including the random access apparatus 1300 in the embodiments of the fourth aspect, and / or a terminal device 102 including the random access apparatus 1100 in the embodiments of the second aspect, which will not be repeated here.

[0513] The embodiments of the present application also provide a terminal device, but the present application is not limited thereto, and can also be other devices.

[0514] FIG. 14 is a schematic diagram of a terminal device according to an embodiment of the present application. As shown in FIG. 14, the terminal device 1400 can include a processor 1410 and a memory 1420; the memory 1420 stores data and programs and is coupled to the processor 1410. It is worth noting that this figure is exemplary; other types of structures can also be used to supplement or replace this structure to realize telecommunication functions or other functions.

[0515] For example, the processor 1410 can be configured to execute programs to implement the method according to the embodiments of the first aspect.

[0516] As shown in FIG. 14, the terminal device 1400 can further include a communication module 1430, an input device 1440, a display 1450, and a power supply 1460. The functions of the above components are similar to those in the prior art, which will not be repeated here. It should be noted that the terminal device 1400 does not necessarily include all the components shown in FIG. 14, and the above components are not essential; in addition, the terminal device 1400 can also include components not shown in FIG. 14, which can refer to the prior art.

[0517] The embodiments of the present application also provide a network device, which can be a base station, but the present application is not limited to this, and can also be other network devices.

[0518] FIG. 15 is a structural schematic diagram of a network device according to an embodiment of the present application. As shown in FIG. 15, the network device 1500 can include a processor 1510 (such as a central processing unit CPU) and a memory 1520; the memory 1520 is coupled to the processor 1510. The memory 1520 can store various data; in addition, it also stores programs 1530 for information processing, and executes the programs 1530 under the control of the processor 1510.

[0519] For example, the processor 1510 can be configured to execute programs to implement the method according to the embodiments of the third aspect.

[0520] In addition, as shown in FIG. 15, the network device 1500 can further include a transceiver 1540, an antenna 1550, etc.; the functions of the above components are similar to those in the prior art, which will not be repeated here. It should be noted that the network device 1500 does not necessarily include all the components shown in FIG. 15; in addition, the network device 1500 can also include components not shown in FIG. 15, which can refer to the prior art.

[0521] FIG. 16 is a schematic diagram of a random access process according to an embodiment of the present application, which is illustrated by taking a 4-step CBRA as an example. As shown in FIG. 16, the method includes:

[0522] 1601, the UE sends a Random Access Preamble (Msg1) to the gNB in the first valid RO or the second valid RO;

[0523] The first valid RO is (completely) located in flexible time domain resources and / or uplink time domain resources, and the second valid RO is located in downlink time domain resources overlapping with the first time domain resources and / or flexible time domain resources overlapping with the first time domain resources.

[0524] 1602, the network device sends a random access response message (Random Access Response, RAR) (Msg2) to the terminal device;

[0525] 1603, the UE sends a connection request message (Schedule Transmission) (Msg3) on the obtained uplink resource;

[0526] 1604, the network device sends a contention resolution message (Msg4) to the UE that successfully accesses.

[0527] In some embodiments, before 1601, there can also be included: determining the first valid RO or the second valid RO. The determination and selection of the first valid RO or the second valid RO, and other operations, etc. can refer to the embodiments of the first aspect, and the same content is not repeated.

[0528] In some embodiments, there can also be included other operations, the specific implementation of which can refer to the embodiments of the first aspect, and the same content is not repeated.

[0529] In some embodiments, 1602-1604 are similar to the prior art, and will not be repeated here.

[0530] Embodiments of the present application also provide a computer readable program, wherein when the program is executed in the random access device or the network device, the program causes the computer to execute the method in the embodiments of the third aspect in the random access device or the network device.

[0531] Embodiments of the present application also provide a storage medium storing a computer readable program, wherein the computer readable program causes the computer to execute the method in the embodiments of the third aspect in the random access device or the network device.

[0532] Embodiments of the present application also provide a computer readable program, wherein when the program is executed in the signal random access device or the terminal device, the program causes the computer to execute the method in the embodiments of the first aspect in the random access device or the terminal device.

[0533] Embodiments of the present application also provide a storage medium storing a computer readable program, wherein the computer readable program causes the computer to execute the method in the embodiments of the first aspect in the random access device or the terminal device.

[0534] The apparatuses and methods described above can be implemented by hardware, or by software and hardware in combination. The present application relates to a computer-readable program that, when executed by a logic component, causes the logic component to implement the above-described apparatuses or constituent components, or causes the logic component to implement the above-described various methods or steps. The logic component is, for example, a field-programmable logic component, a microprocessor, a processor used in a computer, or the like. 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, or the like.

[0535] The methods / apparatuses described in connection with the embodiments of the present application can be directly embodied in hardware, software modules executed by a processor, or a combination thereof. For example, one or more of the functional blocks shown in the figures and / or a combination of one or more of the functional blocks can correspond to each software module of a computer program flow, or to each hardware module. The software modules can correspond to each step shown in the figures, respectively. The hardware modules can be implemented by, for example, fixing the software modules using a field-programmable gate array (FPGA).

[0536] The software modules can be located in a RAM memory, a flash memory, a ROM memory, an EPROM memory, an EEPROM memory, a register, a hard disk, a mobile disk, a CD-ROM, or any other form of storage medium known in the art. A storage medium can be coupled to a processor, so that the processor can read information from, and write information to, the storage medium; or the storage medium can be integral to the processor. The processor and the storage medium can be located in an ASIC. The software modules can be stored in the memory of the mobile terminal, or in a memory card that can be inserted into the mobile terminal. For example, if the device (e.g., the mobile terminal) uses a MEGA-SIM card or a large-capacity flash memory device, the software modules can be stored in the MEGA-SIM card or the large-capacity flash memory device.

[0537] One or more of the functional blocks shown in the figures and / or a combination of one or more of the functional blocks can be implemented as a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any appropriate combination thereof, for performing the functions described in the present application. One or more of the functional blocks shown in the figures and / or a combination of one or more of the functional blocks 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.

[0538] The present application is described above in connection with specific embodiments, but those skilled in the art will understand that the description is merely exemplary and is not intended to limit the scope of the application. Those skilled in the art can make various modifications and variations to the present application based on the spirit and principles of the present application, and these modifications and variations are also within the scope of the present application.

[0539] Addendum:

[0540] Addendum 1. A random access method for a terminal device, comprising:

[0541] In a cell, sending a random access preamble (PRACH) in a first valid RO and / or a second valid RO;

[0542] Wherein the first valid RO is (completely) located in / within flexible time domain resources and / or uplink time domain resources (including or excluding the case of crossing 2-type time domain resources), and the second valid RO is (completely and / or partially and / or at least partially) located in / downlink time domain resources overlapping with the first time domain resources (or said second valid RO completely and / or partially and / or at least partially overlaps with DL SBFD symbols) and / or flexible time domain resources overlapping with the first time domain resources.

[0543] Addendum 2. The method according to Addendum 1, wherein the second valid RO does not overlap with the first valid RO.

[0544] Addendum 3. The method according to Addendum 1, wherein the method further comprises:

[0545] Receiving first indication information (for the cell) indicating (cell-specific) random access parameters, the first indication information including information for configuring ROs.

[0546] Addendum 4. The method according to Addendum 3, wherein the ROs configured by the first indication information include a first RO and / or a second RO, the first RO being located in / within flexible time domain resources and / or uplink time domain resources, and the second RO being (completely and / or partially and / or at least partially) located in / downlink time domain resources overlapping with the first time domain resources and / or flexible time domain resources overlapping with the first time domain resources, and the second RO not overlapping with the first RO.

[0547] Addendum 5. A random access method applied to a network device, comprising:

[0548] Receiving a random access preamble in a first valid RO and / or a second valid RO;

[0549] The first valid RO is located in flexible time domain resources and / or uplink time domain resources (including or excluding the case of crossing 2-type time domain resources), and the second valid RO is located in downlink time domain resources overlapping with the first time domain resources (in other words, the second valid RO overlaps with DL SBFD symbols (completely and / or partially and / or at least partially)) and / or flexible time domain resources overlapping with the first time domain resources.

[0550] Clause 6. The method of clause 5, wherein the method further comprises:

[0551] sending first information indicating available random access preambles corresponding to the valid ROs and / or second information indicating available preambles corresponding to the first valid RO and / or third information indicating available preambles corresponding to the second valid RO.

[0552] Clause 7. The method of clause 5, wherein the method further comprises:

[0553] sending information determining whether the configured ROs are valid or invalid.

[0554] Clause 8. The method of clause 1, wherein the method further comprises:

[0555] sending information indicating whether the configured ROs are valid or invalid.

Claims

A random access device for a terminal device, comprising: The first transmitting unit is configured to transmit a random access preamble in a cell at a first valid RO and / or a second valid RO. Wherein, the first effective RO is located within the flexible time domain resources and / or the uplink time domain resources, and the second effective RO is located in the downlink time domain resources that overlap with the first time domain resources and / or the flexible time domain resources that overlap with the first time domain resources. The apparatus according to claim 1, wherein, The terminal device is a first terminal device, which has the ability to transmit uplink signals using first time domain resources and / or downlink time domain resources overlapping with the first time domain resources and / or flexible time domain resources overlapping with the first time domain resources. The apparatus according to claim 1, wherein, The device further includes: The first receiving unit receives first indication information for indicating random access parameters, the first indication information including information for configuring RO. The apparatus according to claim 3, wherein, The RO configured by the first indication information includes the first valid RO and / or the second valid RO. The apparatus according to claim 1, wherein, When the terminal device is not provided with public uplink / downlink configuration information, the first valid RO does not precede the SSB in its PRACH time slot, and begins at least a first time interval after the last SSB; and / or, When the terminal device is provided with public uplink / downlink configuration information, the first valid RO is within the uplink time domain resources; or, the first valid RO is not before the SSB in its PRACH time slot, and begins after the first time interval after the last downlink time domain resources and after the second time interval after the last SSB. The apparatus according to claim 1, wherein, The second valid RO is within the first frequency domain resource or the second frequency domain resource; and / or, Not overlapping with SSB; and / or, Not before the SSB in its PRACH time slot; and / or, It begins at least three time intervals after the last SSB; and / or, End before at least the fourth time interval of the first SSB; and / or, Within the downlink time domain resources that overlap with the first time domain resources; and / or, Not overlapping with downlink time domain resources that do not overlap with first time domain resources; and / or, It begins at least five time intervals after the last downlink time domain resource that does not overlap with the first time domain resource; and / or, It ends at least before the sixth time interval of the first downlink time domain resource that does not overlap with the first time domain resource; and / or, It does not overlap with flexible time-domain resources that overlap with first-time-domain resources; and / or, It ends at least before the seventh time interval of the first flexible time-domain resource that overlaps with the first time-domain resource, and / or, It does not overlap with flexible temporal domain resources; and / or, Ends at least before the eighth time interval of the first flexible time-domain resource, and / or, It does not overlap with uplink time domain resources; and / or, Ends at least before the ninth time interval of the first uplink time domain resource, and / or, It does not overlap with flexible time-domain resources that do not overlap with first-time-domain resources; and / or, It ends at least before the tenth time interval of the first flexible time-domain resource that does not overlap with the first time-domain resource, and / or, It does not overlap with second time-domain resources; and / or, Begins at least after the eleventh time interval of the last second time domain resource; and / or, End before at least the twelfth time interval of the first second time domain resource; and / or, Flexible time-domain resources that do not overlap with the first time-domain resources and flexible time-domain resources that do not overlap with the first time-domain resources, and multiple overlaps between flexible time-domain resources and uplink time-domain resources; and / or, It does not overlap with the third RO; and / or, It does not overlap with the thirteenth time interval between the first and second time domain resources. The apparatus according to claim 3, wherein, The cell supports SBFD; and / or The terminal device is provided with information indicating that the cell supports SBFD; and / or The cell only allows access to the first terminal device; and / or The terminal device is provided with information to indicate that the cell only allows the first terminal device to access; and / or The cell is configured with first time domain resources and / or is configured with first time domain resources in downlink time domain resources; and / or The terminal device is provided with information for indicating the first time-domain resources of the cell; and / or The cell is configured with first frequency domain resources and / or second frequency domain resources; and / or The terminal device is provided with information for indicating a first frequency domain resource and / or a second frequency domain resource; The corresponding UL BWP includes second frequency domain resources determined based on the first frequency domain resources; and / or The terminal device is provided with the common uplink and downlink configuration information of the cell; and / or The cell is configured with downlink time domain resources by public uplink / downlink configuration information; and / or The terminal device is the first terminal device; and / or The terminal device supports random access using downlink time domain resources and / or downlink time domain resources overlapping with the first time domain resources and / or ROs located in the first time domain resources; and / or The cell allows random access using ROs located in downlink time domain resources and / or downlink time domain resources overlapping with the first time domain resources and / or ROs located in the first time domain resources; and / or The terminal device is provided with information to indicate that the cell allows random access using downlink time domain resources and / or downlink time domain resources that overlap with the first time domain resources and / or ROs located in the first time domain resources; and / or The terminal device is provided with information indicating that the terminal device is permitted to use ROs located in downlink time domain resources and / or in downlink time domain resources overlapping with the first time domain resources and / or in the first time domain resources for random access; and / or The terminal device is provided with information indicating that the RO configured by the first indication information includes a second valid RO; and / or The terminal device is provided with information indicating that the second valid RO is enabled; and / or The terminal device is provided with information to instruct the terminal device to determine and / or use a second valid RO; and / or The terminal device is provided with information to indicate whether a specific RO is valid and / or invalid. The apparatus according to claim 7, wherein, The device further includes: A first processing unit is configured to determine a second valid RO corresponding to the first indication information, and / or, the first indication information is configured to include a second valid RO. The apparatus according to claim 1, wherein, The device further includes: The second processing unit is configured to, for a second RO located in a downlink time-domain resource overlapping with the first time-domain resource and / or a flexible time-domain resource overlapping with the first time-domain resource, if the second RO Within the first frequency domain resource or the second frequency domain resource; and / or, Not overlapping with SSB; and / or, Not before the SSB in its PRACH time slot; and / or, It begins at least three time intervals after the last SSB; and / or, It ends at least before the fourth time interval of the first SSB; and / or, Within the downlink time domain resources that overlap with the first time domain resources; and / or, Not overlapping with downlink time domain resources that do not overlap with first time domain resources; and / or, It begins at least five time intervals after the last downlink time domain resource that does not overlap with the first time domain resource; and / or, It ends at least before the sixth time interval of the first downlink time domain resource that does not overlap with the first time domain resource; and / or, It does not overlap with flexible time-domain resources that overlap with first-time-domain resources; and / or, It ends at least before the seventh time interval of the first flexible time-domain resource that overlaps with the first time-domain resource, and / or, It does not overlap with flexible temporal domain resources; and / or, Ends at least before the eighth time interval of the first flexible time-domain resource, and / or, Uplink time domain resources that do not overlap with uplink time domain resources or first time domain resources; and / or, Ends at least before the ninth time interval of the first uplink time domain resource, and / or, It does not overlap with flexible time-domain resources that do not overlap with first-time-domain resources; and / or, It ends at least before the tenth time interval of the first flexible time-domain resource that does not overlap with the first time-domain resource, and / or, It does not overlap with second time-domain resources; and / or, Begins at least after the eleventh time interval of the last second time domain resource; and / or, End before at least the twelfth time interval of the first second time domain resource; and / or, Flexible time-domain resources that do not overlap with the first time-domain resources and flexible time-domain resources that do not overlap with the first time-domain resources, and multiple overlaps between flexible time-domain resources and uplink time-domain resources; and / or, It does not overlap with the third RO; and / or, It does not overlap with the thirteenth time interval between the first and second time domain resources. Then the second RO is valid. The apparatus according to claim 9, wherein, The SSB includes: The SS / PBCH block indicated by the SSB location information in SIB1 or the serving cell common configuration information; and / or, The SS / PBCH block indicated by the SSB location information in the SMTC supplemental PCI information associated with the physical cell ID; and / or SS / PBCH blocks used for L1 beam measurement and / or reporting; and / or, SS / PBCH block for intra-frequency RRM measurements; and / or, SS / PBCH block for inter-frequency RRM measurements. The apparatus according to claim 3, wherein, The device further includes a second receiving unit, the second receiving unit being used for: Receive information indicating that the cell supports SBFD; and / or Receive information for indicating the first time-domain resources of the cell; and / or Receive information indicating a first frequency domain resource and / or a second frequency domain resource; and / or Receive public uplink and downlink configuration information; and / or Receive information indicating that the cell allows random access using ROs located in downlink time domain resources and / or in downlink time domain resources overlapping with the first time domain resources and / or in flexible time domain resources overlapping with the first time domain resources; and / or Receive information indicating that the terminal device is permitted to use ROs located in downlink time domain resources and / or in downlink time domain resources overlapping with the first time domain resources and / or in flexible time domain resources overlapping with the first time domain resources for random access; and / or Receive information indicating the configuration of the first indication information, including the second valid RO; and / or Receive information indicating that the second valid RO is enabled; and / or Receive information for instructing the terminal device to determine (corresponding to the first indication information) a second valid RO and / or use the second valid RO; and / or Receive information indicating whether a specific RO is valid and / or invalid; and / or Receive information indicating whether PRACH transmission is permitted and / or not permitted on the SSB symbol, and / or, Receive information indicating whether PRACH is allowed and / or not allowed across the first and second time domain resources. The apparatus according to claim 11, wherein, The device further includes: A third processing unit is configured to determine a second valid RO based on the information. The apparatus according to claim 1, wherein, The device further includes: The fourth processing unit is configured to, for the first RO located within the flexible time domain resources and / or uplink time domain resources: When the terminal device is not provided with public uplink / downlink configuration information, if the first RO is not before the SSB in the PRACH time slot where the first RO is located, and the first RO starts at least after a first time interval after the last SSB, then the first RO is valid; and / or, When the terminal device is provided with public uplink and downlink configuration information, the first RO is in the uplink time domain resources; or, the first RO is not before the SSB in the PRACH time slot where the first RO is located, and the first RO starts after the first time interval after the last downlink time domain resource and after the second time interval after the last SSB, then the first RO is valid. The apparatus according to claim 3, wherein, When the RO configured in the first indication information includes a second valid RO, the first transmitting unit transmits the random access preamble only on the second valid RO; or... In the same random access process, the first sending unit sends the random access preamble only in the first valid RO or only in the second valid RO; or, During the same random access process, the first transmitting unit transmits a random access preamble at the first valid RO and / or the second valid RO. The apparatus according to claim 1, wherein, The device further includes: The fourth receiving unit receives first information for indicating the available random access preamble corresponding to a valid RO and / or second information for indicating the available random access preamble corresponding to a first valid RO and / or third information for indicating the available random access preamble corresponding to a second valid RO. The apparatus according to claim 15, wherein, When the terminal device is only provided with the second information, the available random access preambles corresponding to the first valid RO and the second valid RO are the same; And / or, When the terminal device is provided with the third and / or fourth information, the available random access preambles corresponding to the first valid RO and the second valid RO are different. The apparatus according to claim 1, wherein, The device further includes: The fifth processing unit is used to map SSB to the first valid RO and / or map SSB to the second valid RO. A random access device, applied to a network device, comprising: The receiving unit is configured to receive a random access preamble in the first valid RO and / or the second valid RO; Wherein, the first effective RO is located within flexible time domain resources and / or uplink time domain resources, and the second effective RO is located within downlink time domain resources overlapping with the first time domain resources and / or flexible time domain resources overlapping with the first time domain resources. The apparatus according to claim 18, wherein, The device further includes: The receiving unit is used to receive a random access preamble sent by the first terminal device at the first valid RO and / or the second valid RO; and / or, The first valid RO receives the random access preamble sent by the second terminal device. The apparatus according to claim 18, wherein, The device further includes: The sending unit is configured to send first indication information for configuring random access parameters. The RO configured by the first indication information includes the first valid RO and / or the second valid RO. The second valid RO is not used by the second terminal device to send a random access preamble.

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