Uplink data communication method and apparatus, terminal device, and network device

Abstract

The present application relates to the technical field of communications, and discloses an uplink data communication method and apparatus, a terminal device, and a network device. The method comprises: a terminal device performs uplink data transmission of 2-step random access on the basis of a first valid PO obtained by SBFD configuration; and correspondingly, a network device performs uplink data reception of 2-step random access on the basis of the first valid PO obtained by the SBFD configuration. Thus, uplink data communication of 2-step random access needs to use a PO, and however, traditional POs are generally obtained without SBFD configuration. Therefore, in the present application, SBFD can be configured by means of a network, a PO is obtained by SBFD configuration, and then uplink data communication is performed on the basis of the obtained valid PO, thereby combining the SBFD with the uplink data communication, so as to enhance uplink data communication of 2-step random access.

Description

Uplink data communication method and device, terminal equipment and network equipment

[0001] This invention claims priority of the prior application No. 202311049831.3 filed on August 18, 2023, entitled “Uplink data communication method and apparatus, terminal equipment and network equipment”. The contents of the above-mentioned prior application are incorporated into this text by introduction. Technical Field

[0002] The present application relates to the field of communication technology, and in particular to an uplink data communication method and apparatus, a terminal device, and a network device. Background Art

[0003] The standard protocol specified by the 3rd Generation Partnership Project (3GPP) organization introduces related research on 2-step random access.

[0004] In the related research on 2-step random access, the terminal device can send a random access message (i.e., message A or MsgA) and receive a random access response message (i.e., message B or MsgB); correspondingly, the network can receive the random access message and send a random access response message. Among them, MsgA can include a physical random access channel preamble (PRACH preamble) and uplink data; the PRACH preamble can be called MsgA PRACH, and the uplink data can be called MsgA physical uplink shared channel (MsgA PUSCH) or PUSCH payload in MsgA. The uplink data communication can include uplink data transmission and uplink data reception of 2-step random access.

[0005] Currently, two-step random access uplink data communications are primarily targeted at frequency division duplexing (FDD) and time division duplexing (TDD) systems. Compared to FDD systems, which use a symmetrical spectrum to distinguish uplink and downlink, TDD systems can allocate different time slots to uplink and downlink, and use asymmetric spectrum to achieve flexible time slot configuration. However, TDD systems also have limitations on the uplink and downlink time slot ratio, resulting in longer transmission delays in TDD systems. Therefore, further research is needed to circumvent these limitations in uplink and downlink time slot ratios to enhance two-step random access uplink data communications.

[0006] Summary of the Invention

[0007] The present application provides an uplink data communication method and apparatus, a terminal device, and a network device, in order to combine SBFD with uplink data communication of 2-step random access, so as to realize enhanced uplink data communication of 2-step random access.

[0008] In a first aspect, an uplink data communication method of the present application includes:

[0009] The uplink data transmission of the two-step random access is performed according to the first valid physical uplink shared channel opportunity PO obtained by the sub-band full-duplex SBFD configuration.

[0010] It can be seen that since the uplink data communication of 2-step random access requires the use of PO, and the traditional PO is usually obtained by non-SBFD configuration, the present application can configure SBFD through the network and obtain the PO obtained by the SBFD configuration, and then perform uplink data communication based on the obtained valid PO, thereby combining SBFD with uplink data communication to achieve enhanced 2-step random access uplink data communication.

[0011] A second aspect is an uplink data communication method of the present application, comprising:

[0012] The uplink data reception of the 2-step random access is performed according to the first valid physical uplink shared channel opportunity PO obtained by the sub-band full-duplex SBFD configuration.

[0013] In a third aspect, an uplink data communication device of the present application includes:

[0014] The transmission unit is configured to perform uplink data transmission using two-step random access according to a first valid physical uplink shared channel opportunity PO obtained by configuring the sub-band full-duplex (SBFD).

[0015] A fourth aspect is an uplink data communication device of the present application, comprising:

[0016] The receiving unit is configured to perform uplink data reception of a two-step random access according to a first valid physical uplink shared channel opportunity PO obtained by the sub-band full-duplex SBFD configuration.

[0017] In a fifth aspect, the steps in the method designed in the first aspect are applied to a terminal device or in a terminal device.

[0018] In a sixth aspect, the steps in the method designed in the second aspect are applied to a network device or in a network device.

[0019] The seventh aspect is a terminal device of the present application, comprising a processor, a memory, and a computer program or instructions stored on the memory, wherein the processor executes the computer program or instructions to implement the steps in the method designed in the above-mentioned first aspect.

[0020] The eighth aspect is a network device of the present application, comprising a processor, a memory, and a computer program or instructions stored on the memory, wherein the processor executes the computer program or instructions to implement the steps in the method designed in the second aspect above.

[0021] The ninth aspect is a chip of the present application, comprising a processor and a communication interface, wherein the processor executes the steps in the method designed in the first aspect or the second aspect above.

[0022] The tenth aspect is a chip module of the present application, comprising a transceiver component and a chip, wherein the chip comprises a processor, wherein the processor executes the steps in the method designed in the above-mentioned first aspect or second aspect.

[0023] In an eleventh aspect, a computer-readable storage medium of the present application is provided, wherein the computer program or instructions are stored therein, and when the computer program or instructions are executed, the steps of the method according to the first or second aspect are implemented. For example, the computer program or instructions are executed by a processor.

[0024] A twelfth aspect is a computer program product of the present application, comprising a computer program or instructions, wherein when the computer program or instructions are executed, the steps of the method according to the first or second aspect are implemented. For example, the computer program or instructions are executed by a processor.

[0025] The beneficial effects brought about by the technical solutions of the second to twelfth aspects can be referred to the technical effects brought about by the technical solution of the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art.

[0027] FIG1 is a schematic diagram of the architecture of a communication system according to an embodiment of the present application;

[0028] FIG2 is a schematic diagram of a two-step random access process according to an embodiment of the present application;

[0029] FIG3 is a schematic diagram of a flow chart of another two-step random access process according to an embodiment of the present application;

[0030] FIG4 is a structural diagram of a mapping relationship between SSB and RO according to an embodiment of the present application;

[0031] FIG5 is a structural diagram of another mapping relationship between SSB and RO according to an embodiment of the present application;

[0032] FIG6 is a structural diagram of another mapping relationship between SSB and RO according to an embodiment of the present application;

[0033] FIG7 is a schematic structural diagram of a PUSCH time-frequency resource according to an embodiment of the present application;

[0034] FIG8 is a schematic structural diagram of a flexible duplex system according to an embodiment of the present application;

[0035] FIG9 is a schematic diagram of a full-duplex structure according to an embodiment of the present application;

[0036] FIG10 is a schematic structural diagram of time-frequency resources of an SBFD symbol according to an embodiment of the present application;

[0037] FIG11 is a schematic diagram of a structure of a time-frequency domain position of a PO according to an embodiment of the present application;

[0038] FIG12 is a schematic structural diagram of the time-frequency domain position of another effective PO according to an embodiment of the present application;

[0039] FIG13 is a structural diagram of the time-frequency domain position of another effective PO according to an embodiment of the present application;

[0040] FIG14 is a schematic structural diagram of the time-frequency domain position of another effective PO according to an embodiment of the present application;

[0041] FIG15 is a schematic flow chart of an uplink data communication method according to an embodiment of the present application;

[0042] FIG16 is a block diagram of functional units of an uplink data communication device according to an embodiment of the present application;

[0043] FIG17 is a block diagram of functional units of another uplink data communication device according to an embodiment of the present application;

[0044] FIG18 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

[0045] Figure 19 is a structural diagram of a network device according to an embodiment of the present application. DETAILED DESCRIPTION

[0046] It should be understood that the terms "first," "second," and the like in the embodiments of the present application are used to distinguish between different objects, rather than to describe a specific order. In addition, the terms "including," "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, software, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may also include steps or units that are not listed, or may include other steps or units inherent to these processes, methods, products, or devices.

[0047] The term "embodiment" as used in the embodiments of this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various locations in the specification does not necessarily refer to the same embodiment, nor does it refer to independent or alternative embodiments that are mutually exclusive with other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0048] In the embodiments of this application, "and / or" describes the relationship between associated objects and indicates that three relationships can exist. For example, "A and / or B" can represent the following three situations: A exists alone; A and B exist simultaneously; and B exists alone. A and B can be singular or plural.

[0049] In the embodiments of the present application, the symbol " / " can indicate that the preceding and following objects are in an "or" relationship. In addition, the symbol " / " can also represent a division sign, that is, performing a division operation. For example, A / B can mean A divided by B.

[0050] In the embodiments of the present application, "at least one item" or similar expressions refers to any combination of these items, including any combination of single items or plural items, and refers to one or more, and multiple refers to two or more. For example, at least one item (item) of a, b, or c can represent the following seven situations: a, b, c, a and b, a and c, b and c, a, b, and c. Among them, each of a, b, and c can be an element or a set containing one or more elements.

[0051] In the embodiments of this application, "equal to" can be used in conjunction with "greater than" and is applicable to the technical solution adopted when "greater than" is used, and can also be used in conjunction with "less than" and is applicable to the technical solution adopted when "less than" is used. When "equal to" is used in conjunction with "greater than", it should not be used in conjunction with "less than"; when "equal to" is used in conjunction with "less than", it should not be used in conjunction with "greater than".

[0052] In the embodiments of the present application, the terms “of”, “corresponding / relevant”, “corresponding”, and “indicated” may sometimes be used interchangeably.

[0053] The words “associated with,” “corresponding to,” “corresponding to,” “is,” “of,” “for,” “belong to,” “as,” and “regarded as” in the embodiments of the present application can sometimes be used interchangeably.

[0054] The "connection" in the embodiments of the present application refers to various connection methods such as direct connection or indirect connection to achieve communication between devices, and there is no limitation on this.

[0055] The “network” in the embodiments of the present application can be expressed as the same concept as the “system”, and the communication system is the communication network.

[0056] The following describes the relevant contents, concepts, meanings, technical issues, technical solutions and beneficial effects involved in the embodiments of this application.

[0057] 1. Communication system

[0058] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, NR system evolution system, LTE-based Access to Unlicensed Spectrum (LTE-U) system on unlicensed spectrum, NR-based Access to Unlicensed Spectrum (NR-U) system on unlicensed spectrum, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (Wi-Fi), 6th Generation (6G) communication system or other communication systems.

[0059] It should be noted that the number of connections supported by traditional communication systems is limited and easy to implement. However, with the development of communication technology, communication systems can not only support traditional communication systems, but also support device-to-device (D2D) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), vehicle-to-vehicle (V2V) communication, vehicle-to-everything (V2X) communication, narrowband Internet of Things (NB-IoT) communication, etc. Therefore, the technical solutions of the embodiments of the present application can also be applied to the above-mentioned communication systems.

[0060] Optionally, the technical solutions of the embodiments of the present application can be applied to beamforming (beamforming), carrier aggregation (CA), dual connectivity (DC) or standalone (SA) deployment scenarios, etc.

[0061] Optionally, the spectrum used for communication between the terminal device and the network device can be a licensed frequency band or an unlicensed frequency band, without limitation. In addition, the unlicensed frequency band can be understood as a shared frequency band, and the licensed spectrum can be understood as a non-shared frequency band.

[0062] Since the embodiments of the present application describe various embodiments in conjunction with terminal devices and network devices, the terminal devices and network devices involved will be described in detail below.

[0063] 2. Terminal equipment

[0064] A terminal device can be a device with transceiver functions and can also be called a terminal, user equipment (UE), remote terminal equipment (remote UE), relay UE, access terminal equipment, user unit, user station, mobile station, mobile station, remote station, mobile device, user terminal equipment, intelligent terminal equipment, wireless communication equipment, user agent, or user device. It should be noted that a relay device is a terminal device that can provide relay forwarding services for other terminal devices (including remote terminal devices).

[0065] For example, the terminal device can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in unmanned autonomous driving, a wireless terminal device in remote medical, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, or a wireless terminal device in a smart home, etc.

[0066] For another example, the terminal device may also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a next-generation communication system (such as an NR communication system, a 6G communication system), or a terminal device in a future evolved public land mobile communication network (PLMN), etc., without specific limitation.

[0067] Optionally, the terminal device can be deployed on land, including indoors or outdoors, handheld, wearable or vehicle-mounted; can be deployed on the water surface (such as ships, etc.); can be deployed in the air (such as airplanes, balloons and satellites, etc.).

[0068] Optionally, the terminal device may include a device with wireless communication function, such as a chip system, a chip, or a chip module. For example, the chip system may include a chip and may also include other discrete devices.

[0069] Optionally, the terminal device of the embodiment of the present application can be a chip, a chip module, a device, a unit, etc., and there is no specific limitation on this.

[0070] For example, the second compression processing module may be a software unit and / or a hardware unit that performs the second compression processing using the spatial compression vector. In addition, the second compression processing module may be a chip, a chip module, or the like.

[0071] 3. Network equipment

[0072] A network device may be a device with transceiver functions and may be used to communicate with a terminal device.

[0073] Optionally, the network device may be responsible for radio resource management (RRM), quality of service (QoS) management, data compression and encryption, data transmission and reception, etc. on the air interface side.

[0074] Optionally, the network device may include a base station (BS) in a communication system or a device deployed in a radio access network (RAN) for providing wireless communication functions, that is, the network device may include a device in the RAN.

[0075] For example, the devices in the RAN may include an evolved node B (eNB or eNodeB) in an LTE communication system, a next generation evolved node B (ng-eNB) in an NR communication system, a next generation node B (gNB) in an NR communication system, a master node (MN) in a dual-connection architecture, a second node or secondary node (SN) in a dual-connection architecture, etc., without specific limitation.

[0076] Optionally, the network device may include a device in a core network (CN).

[0077] For example, the equipment in the CN may include an access and mobility management function (AMF), a user plane function (UPF), a session management function (SMF), etc.

[0078] Optionally, the network device may also be an access point (AP) in a WLAN, a relay station, a communication device in a future evolved PLMN network, a communication device in an NTN network, etc.

[0079] Optionally, the network device may include a device that provides wireless communication functionality for the terminal device, such as a chip system, a chip, or a chip module. For example, the chip system may include a chip, or may include other discrete devices.

[0080] Optionally, the network device may be a transmission and reception point (TRP).

[0081] Optionally, the network device can communicate with an Internet Protocol (IP) network, such as the Internet, a private IP network, or other data networks.

[0082] Optionally, the network device may include an independent node to implement the functions of the above-mentioned base station, or may include two or more independent nodes to implement the functions of the above-mentioned base station. For example, the network device includes a centralized unit (CU) and a distributed unit (DU), such as a gNB-CU and a gNB-DU. Furthermore, in other embodiments of the present application, the network device may also include an active antenna unit (AAU). The CU implements part of the functions of the network device, and the DU implements another part of the functions of the network device. For example, the CU is responsible for processing non-real-time protocols and services, and implements the functions of the radio resource control (RRC) layer, the service data adaptation protocol (SDAP) layer, and the packet data convergence protocol (PDCP) layer. The DU is responsible for processing physical layer protocols and real-time services, and implements the functions of the radio link control (RLC) layer, the medium access control (MAC) layer, and the physical (PHY) layer. In addition, the AAU can implement some physical layer processing functions, RF processing, and related functions of the active antenna. Because RRC layer information ultimately becomes PHY layer information, or is converted from PHY layer information, in this network deployment, high-layer signaling (such as RRC signaling) can be considered to be generated by the CU and sent by the DU, or sent jointly by the DU and AAU. It is understood that network devices may include at least one of the CU, DU, and AAU. Furthermore, the CU may be classified as a RAN device, or as a core network device, without specific limitation.

[0083] Optionally, the network device can be any site in the multi-site coherent joint transmission (CJT) with the terminal device, or other sites outside the multi-site, or other network devices that communicate with the terminal device in the network, and there is no specific limitation on this. Among them, multi-site coherent joint transmission can be multiple sites coherent transmission, or different data belonging to the same physical downlink shared channel (PDSCH) are sent from different sites to the terminal device, or multiple sites are virtualized into one site for transmission. Names with the same meaning specified in other standards also apply to this application, that is, this application does not limit the names of these parameters. The sites in the multi-site coherent joint transmission can be remote radio heads (RRHs), TRPs, etc., and there is no specific limitation on this.

[0084] Optionally, the network device may be any site in the multi-site non-coherent joint transmission with the terminal device, or other sites outside the multi-site, or other network devices that perform network communication with the terminal device, and there is no specific limitation on this. Among them, the multi-site non-coherent joint transmission can be the joint non-coherent transmission of multiple sites, or different data belonging to the same PDSCH are sent from different sites to the terminal device. The names with the same meaning specified in other standards are also applicable to this application, that is, this application does not limit the names of these parameters. The sites in the multi-site non-coherent joint transmission can be RRH, TRP, etc., and there is no specific limitation on this. The transmission scheme of multiple TRPs may include an M-TRP (single-downlink control information based M-TRP, S-DCI based M-TRP) transmission scheme based on a single downlink control information, and may also include an M-TRP (multiple-downlink control information based M-TRP, M-DCI based M-TRP) transmission scheme based on multiple DCIs.

[0085] It should be noted that the TRP of the present application is not limited to coherent joint transmission or incoherent joint transmission scenarios, but can also be applied to other scenarios without specific restrictions.

[0086] Optionally, the network device may be mobile, for example, a mobile device. Alternatively, the network device may be a satellite or a balloon station. For example, the satellite may be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, a high elliptical orbit (HEO) satellite, etc. Alternatively, the network device may be a base station located on land or in water.

[0087] Optionally, the network device can provide services for a cell, and the terminal device in the cell can communicate with the network device using transmission resources (such as spectrum resources). The cell can be a macro cell, a small cell, a metro cell, a micro cell, a pico cell, or a femto cell.

[0088] Optionally, the network device of the embodiment of the present application may be a chip, a chip module, a device, a unit, etc., and there is no specific limitation on this.

[0089] 4. Example

[0090] The following is an exemplary description of the communication system in an embodiment of the present application.

[0091] For example, a network architecture of a communication system according to an embodiment of the present application can be seen in Figure 1. As shown in Figure 1, the communication system 10 may include a network device 110 and a terminal device 120. The terminal device 120 may communicate with the network device 110 wirelessly.

[0092] FIG1 is merely an example of a network architecture of a communication system and does not limit the network architecture of the communication system in the embodiment of the present application.

[0093] For example, the communication system 10 may also include a server or other devices.

[0094] For another example, the communication system 10 may include other network devices in addition to the network device 110 .

[0095] For another example, the communication system 10 may include other terminal devices in addition to the terminal device 120.

[0096] 2. Random Access Process

[0097] 1. 4-step random access process and 2-step random access process

[0098] 【4-step random access process】

[0099] For 4-step random access, the entire process includes 4 steps: transmission of a random access request message, transmission of a random access response (RAR) message (also known as message 2 (Msg2)), transmission of message 3 (Msg3) and transmission of message 4 (Msg4).

[0100] The random access request message may include a physical random access channel preamble (PRACH preamble, RA preamble for short). The RA preamble's primary function is to request access from a network device, enabling the network device to estimate the transmission delay between the network device and the terminal device based on the RA preamble and calibrate the uplink timing, which is then communicated to the terminal device via a RAR message.

[0101] 【2-step random access process】

[0102] Compared with the 4-step random access process, the 2-step random access process helps reduce the access delay of terminal devices. As shown in Figure 2, the 2-step random access process mainly includes the following two steps:

[0103] Step 1: Transmission of MsgA

[0104] Random access request message, namely Message A (MsgA).

[0105] MsgA may include RA preamble (i.e., the aforementioned Msg1) and uplink data (i.e., the aforementioned Msg3). RA preamble may be referred to as MsgA PRACH; uplink data may be referred to as MsgA Physical Uplink Share Channel (PUSCH) or PUSCH payload in MsgA.

[0106] For MsgA PRACH transmission, the protocol standard introduces the physical random access channel occasion (PRACH occasion, RO). For example, the network equipment configures the RO through high-layer signaling (such as system information). The RO is used to transmit (or carry) MsgA PRACH, and the synchronization signal block (Synchronization Signal and PBCH block, SSB) has a mapping (association / correspondence, etc.) relationship with the RO.

[0107] For MsgA PUSCH transmission, the protocol standard introduces the physical uplink shared channel opportunity (PUSCH Occasion, PO). For example, the network equipment configures PO through high-layer signaling (such as system information). PO is used to transmit (or carry) MsgA PUSCH, and PO has a mapping (association / correspondence) relationship with DMRS (De-Modulation Reference Signal) resources. Among them, DMRS resources can be configured through high-layer parameters (such as msgA-DMRS-Configuration).

[0108] Step 2: Transmission of MsgB

[0109] Random access response message, namely message B (MsgB).

[0110] MsgB may include the aforementioned Msg2 and the aforementioned Msg4.

[0111] When the network device successfully detects MsgA sent by the terminal device, it will carry the successful random access response (i.e., successRAR) through MsgB. Among them, successRAR can indicate the physical uplink control channel (PUCCH) resource used by the terminal device to send the HARQ-ACK (Hybrid Automatic Repeat Request-ACK) feedback information corresponding to MsgB. The PUCCH resource includes PUCCH time-frequency domain resources, as shown in Figure 3.

[0112] It should be noted that when the terminal device receives MsgB, whether it decodes it correctly needs to be fed back to the network device. Therefore, the terminal device can provide feedback through the HARQ-ACK feedback information corresponding to MsgB.

[0113] 2. RA preamble

[0114] Composition of RA preamble

[0115] The RA preamble may consist of a cyclic prefix (CP) and a sequence.

[0116] RA preamble can support 4 long sequences with a length of 839 and 9 short sequences with a length of 139. The length of the sequence composed of RA preamble can be indicated by the high-level parameter prach-RootSequenceIndex.

[0117] Each cell has 64 available RA preambles, forming an RA preamble sequence. Each RA preamble has a unique index (RA preamble index) within the RA preamble sequence. A terminal device selects one RA preamble from the RA preamble sequence (or the network device assigns one) to transmit using a physical random access channel (PRACH) opportunity (RO). This means the RA preamble is carried (or transmitted) by the RO.

[0118] [PRACH time-frequency resources]

[0119] During random access, the transmission of a PRACH message requires time-frequency resources. These resources are divided to produce at least one physical random access channel opportunity (PRACH occasion, RO). The RO is used to transmit or carry the random access request message. The RO can include time-domain resources and frequency-domain resources. Specifically, time-domain resources can be indicated by their index, and frequency-domain resources can be indicated by their index.

[0120] The time domain position or time domain resource of the RO, that is, the PRACH time domain resource used to transmit / carry the RA premble / Msg1, can be configured to the terminal device by the network device through the parameter prach-ConfigurationIndex in the high-level parameter RACH-ConfigGeneric. For example, the specific configuration method can be seen in Table 1.

[0121] Table 1 defines the random access configurations for FR1 and paired spectrum / supplemental uplink. f Indicates the system frame number, x indicates the PRACH configuration period, The number of ROs in a PRACH time slot, Indicates the time domain symbol length of an RO.

[0122] Table 1

[0123] For example, when the PRACH Configuration Index is 109, the following conditions exist:

[0124] The random access preamble format uses A1 / B1;

[0125] Every two system frames (i.e., the system frame index is an even number 0, 2, 4...) contain RO (i.e., n f mod 2 = 0);

[0126] The starting position of the RO time domain resource is in the 4th subframe of the system frame, starting from the 0th OFDM symbol;

[0127] There are 2 PRACH slots in the 4th subframe, and each PRACH slot has 7 A time domain RO;

[0128] RO length is 2 That is, it occupies 2 OFDM symbols.

[0129] It should be noted that the time domain resources identified by the indices of two adjacent time domain resources can be continuous or discontinuous. For example, when the time domain resources are indexed as index 0 and index 1, the time domain resources identified by index 0 are the 0th to 1st OFDM symbols in the 4th subframe in the system frame, and the time domain resources identified by index 1 are the 2nd to 3rd OFDM symbols in the 4th subframe in the system frame.

[0130] The parameter msg1-FrequencyStart in the higher-layer parameter RACH-ConfigGeneric may be used to configure the offset from the starting frequency domain position of the RO to the starting frequency domain position of the initial BWP (intial BWP) or the current active BWP (active BWP).

[0131] The parameter msg1-FDM in the higher-layer parameter RACH-ConfigGeneric can be used to configure the number of frequency-domain resource indexes of ROs, or the number of frequency-domain ROs at the same time-domain position.

[0132] For example, the parameter msg1-FDM=4 may indicate that there are four frequency domain ROs at the same time domain position.

[0133] Mapping between Synchronization Signal and PBCH block (SSB) and beams

[0134] In 5G NR communication systems, cell frequencies increase, and correspondingly, coverage decreases. To increase cell coverage, some broadcast information can be sent using beam sweeping, rather than coverage.

[0135] Beam scanning is to concentrate energy in a certain direction at a certain moment, so that the signal can be sent farther in this direction, but the signal cannot be received in other directions; then, at the next moment, it is sent in another direction; finally, by continuously changing the beam direction, the entire cell is covered.

[0136] In the random access process of 5G NR, beams are used, and SSB has multiple transmission opportunities within a time domain period and has a corresponding index, namely the SSB index.

[0137] Each beam may correspond to (map / associated with) at least one SSB index, and the beams corresponding to different SSB indices may be the same (in the same direction) or different (in different directions).

[0138] SSBs are transmitted in 5ms half-frames, or SS burst sets. All SSBs in an SS burst set are transmitted periodically within the same half-frame. SSBs appear several times within a half-frame at regular intervals. Each SSB corresponds to a beam scanning direction, resulting in an SSB for each direction.

[0139] For a terminal device, only when the SSB beam scanning signal reaches the terminal device does it have the opportunity to send an RA preamble. This means that the beam corresponds (associated / mapped) to the RA preamble. At this point, if the network device receives the terminal device's RA preamble, it will know the optimal downlink beam or the optimal downlink beam. In other words, the network device knows which beam is pointing to the terminal device.

[0140] Because beams correspond to RA preambles, which in turn correspond to SSBs, SSBs need to be mapped to RA preambles. Furthermore, because RA preambles must be sent based on ROs (i.e., they must be carried / transmitted by ROs), SSBs need to be mapped to ROs so that network devices know which beam to use to send Msg2 to the terminal device.

[0141]

SSB mapping RO and SSB mapping RA preamble

[0142] The network device can configure N (where N is configured by the L1 parameter SSB-per-rach-occasion) SSBs associated (mapped / corresponded) to one RO (N≥1) for the terminal device through the high-level parameter ssb-perRACH-OccasionAndCB-PreamblesPerSSB, or the network device can configure an SSB associated (mapped / corresponded) 1 / N (where N is configured by the L1 parameter SSB-per-rach-occasion) ROs (N<1) for the terminal device through the high-level parameter ssb-perRACH-OccasionAndCB-PreamblesPerSSB, and each SSB is associated (mapped / corresponded) to R (where R is configured by the L1 parameter CB-preambles-per-SSB) RA preamble index.

[0143] For example, the value of N can be {1 / 8, 1 / 4, 1 / 2, 1, 2, 4, 8, 16}.

[0144] There are two configurations for N:

[0145] One is that N<1. In this case, one SSB can be associated with 1 / N valid ROs. The preamble associated with this SSB starts with RA preamble index 0.

[0146] For example, if N=1 / 8, one SSB is associated with 8 ROs, and the preamble index of the starting point of the 8 ROs is 0.

[0147] The other is that N≥1, in which case N SSBs are associated with one RO. For example, SSB n can select one from R preambles to send Msg1, 0≤n≤N-1, n refers to the SSB index, and the preamble associated with SSB n is from RA preamble index Start. Among them, It is configured by the higher-layer parameter totalNumberOfRA-Preambles and is an integer multiple of N.

[0148] For example, with N=2, For example, in this case, two SSBs are associated with one RO. The RA preamble index associated with SSB0 starts at 0, and the RA preamble index associated with SSB1 starts at 32. In other words, SSB0 is associated with RA preambles with indices from 0 to 31, and SSB1 is associated with RA preambles with indices from 32 to (the total number of corresponding RA preambles - 1).

[0149] It should be noted that for FDD (Frequency Division Duplexing) mode or paired spectrum, all ROs are valid.

[0150] For TDD (Time Division Duplexing) mode or unpaired spectrum, if the network side does not configure high-level parameters (such as tdd-UL-DL-ConfigurationCommon), then for a RO in a PRACH time slot, when the RO is after the SSB in the PRACH time slot and starts no earlier than N symbols after the last SSB symbol gap When N is equal to 1 symbol, the RO is valid, that is, valid RO. gap The relationship between the RA preamble subcarrier spacing and the RA preamble subcarrier spacing is shown in Table 2.

[0151] For TDD mode or unpaired spectrum, if the network side configures high-level parameters (such as tdd-UL-DL-ConfigurationCommon), then for a RO in a PRACH time slot, when the RO is in the uplink symbol, the RO is valid, that is, a valid RO. Or, when the RO is after the SSB in the PRACH time slot and starts no earlier than N after the last downlink symbol gap symbols, and starting no earlier than N after the last SSB symbol gap symbols, the RO is valid, that is, a valid RO.

[0152] Table 2

[0153] In Table 2, for the RA preamble sequence with a subcarrier spacing (SCS) of 1.25kHz / 5kHz, N gap The value of is 0; for RA preamble sequences with subcarrier spacing (SCS) of 15kHz / 30kHz / 60kHz / 120kHz, N gap The value of is 2.

[0154] Starting from frame 0, the association period (SSB-to-RO association period) for mapping SSB indices to ROs is a set of minimum values ​​in the PRACH configuration period determined according to Table 3, so that at least N SSB indices are mapped to ROs at least once within one SSB-to-RO association period.

[0155] One SSB-to-RO association pattern period includes one or more SSB-to-RO association periods and is determined as a pattern between RO and SSB indexes that repeats once every 160 milliseconds at most.

[0156] To sum up, the mapping relationship between SSB and RO can be carried out in the following order:

[0157] First, the order of RA preamble indexes in a RO is increasing;

[0158] Secondly, the frequency resource index of the frequency-division multiplexed (FDM) RO is in increasing order;

[0159] Again, the order of the time resource index (RTRI) of the time-division multiplexed (TDM) ROs within a PRACH time slot is increasing;

[0160] Finally, the order of PRACH slot indices is increasing.

[0161] Table 3 Mapping relationship between PRACH configuration period, SSB and RO association period

[0162] The following is an example to illustrate the above “mapping relationship between SSB and RO”.

[0163] [Example 1]

[0164] For example, a cell is configured with 8 SSBs, with respective indexes of 0 to 7, parameter msg1-FDM = 4, and parameter ssb-perRACH-Occasion = 1 / 4. In this case, the mapping relationship between SSBs and ROs is shown in Figure 2.

[0165] In FIG4 , the parameter msg1-FDM=4 indicates that on one time domain resource of the RO, the frequency domain resource indexes of the RO are index 0, index 1, index 2, and index 3.

[0166] The parameter ssb-perRACH-Occasion=1 / 4 (ie, N=1 / 4) means that 1 SSB maps 4 ROs.

[0167] Therefore, SSB 0 is mapped to four ROs in sequence according to the increasing order of the frequency domain resource index, that is, the RO whose time domain resource index is index 0 and whose frequency domain resource indexes are index 0, index 1, index 2, and index 3.

[0168] Since the number of SSBs is 8, the SSBs have not been mapped yet. Therefore, according to the above-mentioned "mapping principle", SSB 1 is mapped to 4 ROs in sequence in the ascending order of the frequency domain resource index. That is, when the time domain resource index of the RO is index 1, the frequency domain resource index is index 0, index 1, index 2, index 3 in the RO, and so on.

[0169] [Example 2]

[0170] For example, a cell is configured with 8 SSBs, with respective indexes of 0 to 7, parameter msg1-FDM = 4, and parameter ssb-perRACH-Occasion = 1. In this case, the mapping relationship between SSBs and ROs is shown in Figure 3.

[0171] In FIG5 , the parameter msg1-FDM=4 indicates that on one time domain resource of the RO, the frequency domain resource indexes of the RO are index 0, index 1, index 2, and index 3.

[0172] The parameter ssb-perRACH-Occasion = 1 indicates that one SSB is mapped to one RO. Therefore, in ascending order of frequency domain resource index, SSBs 0 to 3 are mapped to ROs with time domain resource index 0 and frequency domain resource indexes 0, 1, 2, and 3. That is, when SSB 0 is mapped to RO with time domain resource index 0, it is mapped to RO with frequency domain resource index 0, and so on.

[0173] Since the number of SSBs is 8, the SSBs have not been mapped yet. Therefore, according to the above-mentioned "mapping principle", SSBs 4 to 7 are mapped in sequence in the ascending order of the frequency domain resource index to the RO with the time domain resource index of index 2 and the frequency domain resource index of index 0, index 1, index 2, index 3, and so on.

[0174] [Example 3]

[0175] For example, a cell is configured with 8 SSBs, with respective indexes of 0 to 7, parameter msg1-FDM = 4, and parameter ssb-perRACH-Occasion = 2. In this case, the mapping relationship between SSBs and ROs is shown in FIG4 .

[0176] In FIG6 , the parameter msg1-FDM=4 indicates that on one time domain resource of the RO, the frequency domain resource indexes of the RO are index 0, index 1, index 2, and index 3.

[0177] The parameter ssb-perRACH-Occasion=2 means that 2 SSBs are mapped to 1 RO.

[0178] The specific mapping is as follows:

[0179] The index of the time domain resource of SSB 0 / 1 mapping RO is index 0, and the index of the frequency domain resource is RO with index 0, the index of the time domain resource of SSB 2 / 3 mapping RO is index 0, and the index of the frequency domain resource is RO with index 1, the index of the time domain resource of SSB 4 / 5 mapping RO is index 0, and the index of the frequency domain resource is RO with index 2, and the index of the time domain resource of SSB 6 / 7 mapping RO is index 0, and the index of the frequency domain resource is RO with index 3.

[0180] The same applies to the rest.

[0181]

CSI-RS mapping RO

[0182] Similar to SSB, CSI-RS has a corresponding relationship with beam. If the random access procedure is triggered by a higher layer request and the CSI-RS index is associated with a RO, then if the parameter ra-PreambleIndex is not 0, the parameter ra-OccasionList indicates the RO set associated with the CSI-RS index.

[0183] [PUSCH time-frequency resources]

[0184] In the 2-step random access process, the transmission of MsgA PUSCH requires the use of PUSCH time-frequency resources. Among them, the PUSCH time-frequency resources may include at least one PO, and the PO can be divided into time domain PO and frequency domain PO.

[0185] A PO for PUSCH transmission may be defined by frequency domain resources and time domain resources, and a PO is associated with a DMRS resource.

[0186] For example, as shown in Figure 7, for the configuration of time domain resources, the network can be configured as follows:

[0187] -Time slot start point: indicates the time domain offset between the PRACH time slot and the first PUSCH time slot; for example, it is configured by the higher-layer parameter msgAPUSCH-timeDomainOffset;

[0188] -The number of PUSCH time slots; for example, configured by the higher-layer parameter nrofSlotsMsgAPUSCH;

[0189] -The number of time division multiplexing (TDM) POs in a PUSCH time slot, such as m; for example, configured by the higher-layer parameter nrofMsgAPOperSlot;

[0190] -PO time size; for example, configured via the high-level parameter startSymbolAndLengthMsgAPO.

[0191] For example, as shown in FIG7 , for the configuration of frequency domain resources, the network can be configured as follows:

[0192] - Frequency start point: indicates the offset between the first RBPRACH slot of the first PO within the activated UL BWP and the reference point; for example, it is configured by the higher-layer parameter frequencyStartMsgAPUSCH;

[0193] -The number of frequency division multiplexing (FDM) POs at the same frequency domain location, such as n; for example, configured by the higher-layer parameter nrMsgAPO-FDM;

[0194] - PO frequency size; for example, configured by the high-level parameter nrofPRBsperMsgAPO.

[0195] [Mapping relationship between PO and DMRS resources]

[0196] The mapping relationship between PO and DMRS resources can be as follows:

[0197] First, the frequency domain resource index order of frequency division multiplexing (FDM) PO is increasing; as shown in Figure 7, the frequency domain resource index is arranged in ascending order from 0 to n-1;

[0198] Secondly, within a PO, the DMRS resource indexes are arranged in ascending order; wherein the DMRS resource indexes are first determined according to the ascending order of the DMRS port indexes, and then determined according to the ascending order of the DMRS sequence indexes; for example, in FIG7 , within a PO, the DMRS resource indexes are arranged in ascending order from 0 to 3, and these DMRS resource indexes are first determined according to the ascending order from 0 to 1 according to the DMRS port indexes, and then determined according to the ascending order from 0 to 1 according to the DMRS sequence indexes;

[0199] Again, the order of the time domain resource indexes of the time division multiplexing (TDM) PO within a PUSCH time slot is increasing; as shown in FIG7 , the time domain resource indexes are arranged in ascending order from 0 to m-1;

[0200] Finally, the order of the PUSCH time slot index is increasing; as shown in FIG7 , the PUSCH time slot index is arranged in ascending order from 0 to k-1.

[0201] In summary, the same PO can be associated with different DMRS resources, and can constitute different physical uplink shared channel resource units (PUSCH Resource Units, PRUs), so that PRACH PUSCH can be transmitted through the PRUs. DMRS resources can correspond to DMRS sequences or DMRS ports.

[0202] In this way, the same PO can be associated with a DMRS sequence or a DMRS port, so that different POs can be distinguished by the DMRS sequence or the DMRS port. In other words, for a PO, the PO can be distinguished by the DMRS sequence or the DMRS port.

[0203] Mapping ratio between PRU and RA preamble

[0204] In one SSB and RO association pattern period, the continuous N associated with the valid RO in the PRACH time slot preamble RA preambles are mapped to one PRU. At this time, the mapping ratio between PRU and RA preamble is M=N preamble .

[0205] Among them, N preamble =ceil(Tpreamble / T PUSCH ), T preamble It represents the total number of valid POs in one SSB and RO association pattern period multiplied by the number of RA preambles associated with each valid PO; T PUSCH Indicates the total number of valid POs configured for each PUSCH in one SB and RO association pattern period multiplied by the number of DMRS resource indexes associated with each valid PO; T preamble / T PUSCH Indicates T preamble Divide by T PUSCH ;ceil(T preamble / T PUSCH ) indicates T preamble / T PUSCH Round up.

[0206] Similarly, within an SSB-to-RO association pattern period, the number of consecutive N associated valid ROs in a PRACH time slot is preamble RA preambles are mapped to N pru PRU. At this time, the mapping rate between PRU and RA preamble is M=ceil(N preamble / N pru ). That is, M RA preambles are mapped to one PRU.

[0207] 3. Transmission Mode

[0208] It should be noted that this application may involve various transmission modes, such as TDD, FDD, flexible duplex, and full duplex. The following describes time domain location, frequency domain location, TDD, FDD, flexible duplex, and full duplex.

[0209]

Time domain position and frequency domain position

[0210] The time domain location can be understood as the location of the resources used for transmission in the time domain. For example, the time domain location can include one of a subframe, a slot, a symbol, a mini slot, etc., without specific limitation.

[0211] The frequency domain location can be understood as the location of the resource used for transmission in the frequency domain. For example, the frequency domain location can include one of a subband, a resource block (RB), a resource element (RE), a subcarrier, etc., without specific limitation.

[0212] It should be noted that the sub-band here can be understood as a sub-band divided from a bandwidth, wherein the bandwidth can be BWP.

[0213] Optionally, the same time domain location or the same frequency domain location may support only uplink transmission or only downlink transmission. In other words, the transmission direction at the same time domain location or the same frequency domain location is the same. The specific direction depends on the transmission mode.

[0214] Optionally, the same time domain location or the same frequency domain location can support both uplink and downlink transmission. In other words, the transmission directions at the same time domain location or the same frequency domain location are different. The specific direction needs to be determined according to the transmission mode.

[0215] TDD and FDD

[0216] For TDD, at the same frequency domain position, uplink transmission and downlink transmission use different time domain positions respectively, and the transmission direction at the same time domain position is the same, that is, either uplink transmission or downlink transmission.

[0217] For example, in the case of time slots, the network configures time slots n and n+1 to support downlink transmission, and time slot n+2 to support uplink transmission. In this case, downlink communication between the network device and the terminal device can only be performed in time slots n and n+1, and uplink communication between the network device and the terminal device can only be performed in time slot n+2.

[0218] For FDD, at the same time domain position, uplink transmission and downlink transmission use different frequency domain positions respectively, and the transmission direction at the same frequency domain position is the same, that is, either uplink transmission or downlink transmission.

[0219] Flexible duplex

[0220] It should be noted that flexible duplexing may include flexible TDD duplexing and / or flexible FDD duplexing. Flexible duplexing can be beneficial in meeting different transmission requirements and improving the flexibility of transmission modes.

[0221] For TDD duplexing, at the same frequency domain position, there are flexible time domain positions and non-flexible time domain positions.

[0222] The non-flexible time domain position can be understood as the supported transmission direction will not change dynamically, which is similar to the description of the above-mentioned “TDD”.

[0223] Flexible time domain locations can be understood as dynamically changing the supported transmission directions. That is, for the same flexible time domain location, the network can schedule / configure a cell or terminal device to support downlink transmission, while scheduling / configuring another cell or terminal device to support uplink transmission.

[0224] For example, taking the time domain position as a time slot, as shown in Figure 8, at one or more frequency domain positions, the network configures time slot n and time slot n+1 to support downlink transmission, configures time slot n+4 to support uplink transmission, and configures time slot n+2 and time slot n+3 as flexible.

[0225] Full-duplex

[0226] It should be noted that for full-duplex, it can be understood that the same time domain position or the same frequency domain position can support uplink transmission and downlink transmission at the same time; or, different frequency domain positions on the same time domain position can respectively support uplink transmission and downlink transmission; or, different time domain positions on the same frequency domain position can respectively support uplink transmission and downlink transmission.

[0227] For example, taking the time domain position as a time slot, as shown in Figure 9, the network configuration is as follows:

[0228] Time slot n supports downlink transmission; time slot n+1, time slot n+2, and time slot n+3 all support uplink and downlink transmission at the same time, that is, for time slot n+1, time slot n+2, and time slot n+3, there are frequency domain positions supporting uplink transmission and frequency domain positions supporting downlink transmission; time slot n supports uplink transmission.

[0229] 4. Uplink Data Communication Enhancement with 2-Step Random Access

[0230] 1. Description

[0231] In a TDD system, all frequency domain resources on a TDD carrier must transmit in the same direction at the same time, either uplink or downlink. This prevents flexible configuration of the uplink and downlink time slot ratios for different frequency domain resources on a TDD carrier. Furthermore, with the diversification of services, especially those in vertical industries, different services have varying requirements for uplink and downlink transmission, making a single uplink and downlink time slot ratio incapable of meeting the needs of diverse services.

[0232] To minimize the limitations on uplink and downlink time slot ratios while also taking into account base station implementation complexity, this application considers subband full duplex (SBFD), which divides the frequency domain of the same TDD carrier into non-overlapping uplink and downlink subbands to support both uplink and downlink transmissions at the same time, improving spectrum utilization and flexibility. Therefore, this application can combine SBFD with uplink data communication using two-step random access to enhance uplink transmission using two-step random access.

[0233] In specific implementation, since the uplink data communication of 2-step random access requires the use of PO, and the traditional PO is usually obtained by non-SBFD configuration, this application can configure SBFD through the network and obtain the PO obtained by the SBFD configuration, and then perform uplink data communication based on the obtained valid PO, thereby combining SBFD with uplink data communication to achieve enhanced 2-step random access uplink data communication.

[0234] It should be noted that the "uplink data communication" mentioned in this application can be understood as, for a terminal device, the terminal device can send or transmit uplink data / MsgA PUSCH / PUSCH payload in MsgA; for a network device, the network device can receive uplink data / MsgA PUSCH / PUSCH payload in MsgA. The following description of this application mainly uses MsgA PUSCH as an example.

[0235] In combination with the above content, the technical solutions, beneficial effects, concepts, etc. involved in the embodiments of the present application are described in detail below.

[0236] 2. Specific instructions

[0237] It should be noted that the contents in the following sections may be combined and related to each other, may be parallel to each other, or may be independent of each other, and there is no specific limitation on this.

[0238] 1)SBFD

[0239]

symbol

[0240] In the time domain, the "symbols" described in this application can be OFDM symbols, which can include downlink symbols, uplink symbols, and flexible symbols. Downlink symbols can only support downlink transmission; uplink symbols can only support uplink transmission; and flexible symbols can be configured by the network to support either uplink or downlink transmission, that is, they can only support one transmission mode.

[0241] Optionally, the symbol can be configured by the network through network signaling (such as MAC signaling, MAC CE, DCI, system information, dedicated information, UE-dedicated signaling, etc.).

[0242]

SBFD

[0243] In a TDD system, all frequency domain resources on a TDD carrier must transmit in the same direction at the same time, either uplink or downlink. This prevents flexible configuration of the uplink and downlink time slot ratios for different frequency domain resources on a TDD carrier. Furthermore, with the diversification of services, especially those in vertical industries, different services have varying requirements for uplink and downlink transmission, making a single uplink and downlink time slot ratio incapable of meeting the needs of diverse services.

[0244] In order to avoid the limitation of uplink and downlink time slot ratio as much as possible, and taking into account the implementation complexity of network equipment, this application considers SBFD, that is, dividing non-overlapping uplink sub-bands and downlink sub-bands in the frequency domain of the same TDD carrier, so as to support uplink and downlink transmission at the same time, thereby improving spectrum utilization and flexibility.

[0245] SBFD Resources

[0246] The network can configure SBFD resources through network signaling (such as DCI, MAC signaling, MAC CE, system information, dedicated information, UE-specific signaling, etc.). SBFD resources may include time-domain SBFD resources and frequency-domain SBFD resources.

[0247] Time-domain SBFD resources can be understood as SBFD resources in the time domain, which may include SBFD symbols, SBFD time slots, SBFD mini-time slots, SBFD subframes, etc.

[0248] Frequency-domain SBFD resources can be understood as SBFD resources in the frequency domain, which can include SBFD uplink subbands and SBFD downlink subbands. Among them, the SBFD uplink subband can be used for uplink transmission or uplink reception, and the SBFD downlink subband can be used for downlink transmission.

[0249] SBFD Symbol

[0250] SBFD symbols are symbols that have been configured to allow SBFD operations. In other words, the original symbol's attribute of supporting uplink or downlink transmission has changed due to the configuration of SBFD operations.

[0251] Of course, the SBFD uplink subband can be referred to as an "uplink subband," and the SBFD downlink subband can be referred to as a "downlink subband." Furthermore, the present application may replace "SBFD symbol" with "SBFD time slot," "SBFD mini-time slot," "SBFD subframe," etc. Their respective meanings are similar to those of "SBFD symbol," and are not specifically limited thereto.

[0252] Optionally, a guard band may be provided between the uplink sub-band and the downlink sub-band, so that interference between the uplink and downlink can be avoided as much as possible through the guard band.

[0253] For example, as shown in FIG10 , time slot n includes multiple downlink symbols, and these downlink symbols only include downlink subbands; time slot n+1 includes multiple SBFD symbols, and the frequency domain resources of these SBFD symbols include uplink subbands, downlink subbands, and guard bands.

[0254] Optionally, the SBFD symbols may include SBFD downlink symbols, SBFD uplink symbols, and SBFD flexible symbols.

[0255] The SBFD downlink symbol can be understood as a downlink symbol configured to allow SBFD operation. Therefore, the SBFD downlink symbol can support downlink transmission and uplink transmission.

[0256] For example, the network may configure a portion of uplink subbands in the frequency domain of downlink symbols in the original time slot through network signaling, so that the downlink symbols can support uplink and downlink transmissions, thereby configuring SBFD operations.

[0257] The SBFD uplink symbol can be understood as an uplink symbol configured to allow SBFD operation. Therefore, the SBFD uplink symbol can support uplink transmission and downlink transmission.

[0258] For example, the network may configure a portion of downlink subbands in the frequency domain of the uplink symbol in the original time slot through network signaling, so that the uplink symbol can support uplink transmission and downlink transmission, thereby configuring the SBFD operation.

[0259] SBFD flexible symbols can be understood as flexible symbols configured to allow SBFD operation. Therefore, SBFD flexible symbols can be configured by the network to support both uplink and downlink transmission, that is, to support both uplink and downlink transmission.

[0260] For example, the network may configure a portion of uplink subbands and a portion of downlink subbands in the frequency domain of the flexible symbol in the original time slot through network signaling, so that the flexible symbol can support uplink transmission and downlink transmission, thereby configuring the SBFD operation.

[0261] Non-SBFD symbols

[0262] In order to distinguish from SBFD symbols, non-SBFD symbols can be understood as symbols that are not configured for SBFD operation, or original symbols in the time slot, or symbols that do not allow SBFD operation.

[0263] In other words, the original symbol's attribute of supporting uplink or downlink transmission remains unchanged because SBFD is not configured. That is, the original downlink symbol can only support downlink transmission; the original uplink symbol can only support downlink transmission; the original flexible symbol can be configured by the network to support uplink or downlink transmission, that is, it can only support one transmission mode.

[0264] It should be noted that, in order to distinguish from the SBFD symbols mentioned above, this application introduces "non-SBFD downlink symbols", "non-SBFD uplink symbols" and "non-SBFD flexible symbols".

[0265] Optionally, non-SBFD symbols may include non-SBFD downlink symbols, non-SBFD uplink symbols, and non-SBFD flexible symbols, and may include original downlink symbols, original uplink symbols, and original flexible symbols.

[0266] Non-SBFD downlink symbols can be understood as downlink symbols that are not configured for SBFD operation, or are original downlink symbols, or downlink symbols that do not allow SBFD operation. Therefore, non-SBFD downlink symbols can only support downlink transmission.

[0267] Non-SBFD uplink symbols can be understood as uplink symbols that are not configured for SBFD operation, or are original uplink symbols, or uplink symbols that do not allow SBFD operation. Therefore, non-SBFD uplink symbols can only support uplink transmission.

[0268] Non-SBFD flexible symbols can be understood as flexible symbols that are not configured for SBFD operation, or are original flexible symbols, or flexible symbols that do not allow SBFD operation. Therefore, non-SBFD flexible symbols can be configured by the network to support uplink or downlink transmission, that is, they can only support one transmission mode.

[0269] 2) Traditional PO

[0270]

describe

[0271] For uplink data communication with two-step random access in a traditional communication system (such as a TDD system or an FDD system), the traditional communication system configures a PO and transmits the MsgA PUSCH via the PO. To distinguish it from uplink data communication with two-step random access in the SBFD communication system described below, the present application may refer to the PO configured in the traditional communication system as a "legacy PO."

[0272] Optionally, the PO obtained by the non-SBFD configuration may include a valid PO and / or an invalid PO, wherein the valid PO may be used to transmit the MsgA PUSCH, while the invalid PO cannot be used to transmit the MsgA PUSCH.

[0273] In addition, in order to distinguish them from the "first valid PO" that appears later, this application may refer to the valid POs in the traditional / original POs as "second valid POs".

[0274]

Second effective PO

[0275] Combined with the above content in "PUSCH time-frequency resources", the second effective PO can be defined as follows:

[0276] The second valid PO may be within the PUSCH time slot and within a non-SBFD uplink symbol (ie, an uplink symbol) or a non-SBFD flexible symbol (ie, a flexible symbol); or,

[0277] The second valid PO may be within the PUSCH time slot and may start no earlier than a preset number of symbols after the last non-SBFD downlink symbol (i.e., the last downlink symbol), and / or may start no earlier than a second preset number of symbols after the SSB symbol; or

[0278] The second valid PO may be within the PUSCH time slot and within an uplink symbol or a flexible symbol; or

[0279] The second valid PO may be within the PUSCH time slot and may start no earlier than a second preset number of symbols after the last downlink symbol and / or may start no earlier than a second preset number of symbols after the SSB symbol.

[0280] The phrase "starting no earlier than the second preset number of symbols after the non-SBFD downlink symbol" can be understood as the second valid PO starting from at least the second preset number of symbols after the last non-SBFD downlink symbol.

[0281] Among them, starting no earlier than the second preset number of symbols after the SSB symbol can be understood as that the second valid PO starts from at least the second preset number of symbols after the SSB symbol.

[0282] Optionally, the second preset number of symbols may include N gap symbols.

[0283] For example, the second preset number of symbols is N gap As an example, as shown in FIG11 , the second valid PO is at least N after the last downlink symbol (ie, non-SBFD downlink symbol). gap (N gap =3) symbols.

[0284] Optionally, the second valid PO may be configured using 2-step random access channel configuration information.

[0285] The 2-step random access channel configuration information may be transmitted by the network through network signaling, thereby enabling the network to configure the second valid PO through the 2-step random access channel configuration information.

[0286] For example, in conjunction with the content in "PUSCH Time-Frequency Resources" in "II. Random Access Procedure" above, the 2-step random access channel configuration information may include a higher-level parameter msgA-PUSCH-Config or a higher-level parameter separateMsgA-PUSCH-Config. The higher-level parameter msgA-PUSCH-Config or the higher-level parameter separateMsgA-PUSCH-Config may include a parameter msgAPUSCH-timeDomainOffset, a parameter nrofMsgAPOperSlot, a parameter startSymbolAndLengthMsgAPO, a parameter frequencyStartMsgAPUSCH, and the like.

[0287] 3) PO obtained by SBFD configuration

[0288]

describe

[0289] For uplink data communications with two-step random access in a communication system configured with SBFD (hereinafter referred to as the SBFD communication system), the SBFD communication system configures a PO and transmits the MsgA PUSCH via the PO. To distinguish it from the conventional communication system described above, the present application may refer to the PO configured by the SBFD communication system as the "PO obtained by the SBFD configuration."

[0290] Optionally, the PO obtained by the SBFD configuration may include a valid PO and / or an invalid PO, wherein the valid PO may be used to transmit the MsgA PUSCH, while the invalid PO cannot be used to transmit the MsgA PUSCH.

[0291] In addition, in order to distinguish it from the "second valid PO" mentioned above, the present application may refer to the valid PO in the RO obtained by SBFD configuration as the "first valid PO".

[0292]

First effective PO

[0293] Different from the above-mentioned "second valid PO", this application also needs to specifically define the "first valid RO". In other words, this application needs to define which POs can be used as valid POs from the POs obtained by SBFD configuration.

[0294] The following provides multiple definition methods, which can be independent of each other, interrelated, or combined to form new methods to adapt to various scenarios and improve the flexibility of uplink data communication.

[0295]

Method 1

[0296] In "Method 1", this application considers the case of switching from non-SBFD downlink symbols to SBFD symbols. The PO obtained by the SBFD configuration is defined from the frequency domain perspective and the time domain perspective respectively.

[0297] ◆Frequency domain perspective

[0298] From the frequency domain perspective, the present application may define the PO in the uplink subband of the SBFD symbol as a valid PO. The SBFD symbol here may include SBFD downlink symbols, SBFD uplink symbols, and SBFD flexible symbols.

[0299] That is, the first valid PO may be in the uplink subband of the SBFD symbol.

[0300] In this way, since the uplink subband can support uplink transmission, the PO in the uplink subband can support MsgA PUSCH transmission, so that the PO can be regarded as valid.

[0301] Optionally, the first valid PO is within the uplink subband of the SBFD symbol, and may include: all frequency domain resource units of the first valid PO are within the uplink subband of the SBFD symbol.

[0302] The frequency domain resource unit may be a subcarrier, RE or RB, etc.

[0303] For example, taking the frequency domain resource unit as RB, all RBs of the first valid PO are in the uplink subband of the SBFD symbol.

[0304] It is understandable that all RBs of the first valid PO need to be within the uplink subband of the SBFD symbol. In this way, all RBs of the first valid PO can support MsgA PUSCH transmission.

[0305] Optionally, the first valid PO is in the uplink subband of the SBFD symbol and may include:

[0306] Some frequency domain resource units of the first valid PO are in the uplink subband of the SBFD flexible symbol, and the remaining frequency domain resource units are in the downlink subband of the SBFD flexible symbol.

[0307] The frequency domain resource unit may be a subcarrier, RE or RB, etc.

[0308] For example, taking the frequency domain resource unit as RB, part of the RBs of the first valid PO is in the uplink subband of the SBFD symbol, and the remaining RBs are in the downlink subband of the SBFD flexible symbol.

[0309] It is understandable that a portion of the RBs in the first valid PO may be in the uplink subband of the SBFD symbol, and this portion of the RBs can support MsgA PUSCH transmission. In this way, the present application can still use this portion of the RBs to transmit MsgA PUSCH, without considering that the entire RB cannot be used for MsgA PUSCH transmission because the remaining RBs are in the downlink subband, thereby improving spectrum utilization.

[0310] ◆Time domain perspective

[0311] From a time domain perspective, the present application may define a PO that starts no earlier than a preset number of symbols after the non-SBFD downlink symbol switches to the SBFD symbol as a valid PO.

[0312] That is, the first valid PO may start no earlier than the first preset number of symbols after the non-SBFD downlink symbol is switched to the SBFD symbol.

[0313] Among them, starting no earlier than the first preset number of symbols after the non-SBFD downlink symbol is switched to the SBFD symbol can be understood as the first valid PO starting at least the first preset number of symbols after the non-SBFD downlink symbol is switched to the SBFD symbol.

[0314] The SBFD symbols here may include SBFD downlink symbols, SBFD uplink symbols, and SBFD flexible symbols.

[0315] The first preset number of symbols may include N gap symbols.

[0316] In this way, since there is at least a first preset number of symbols between the first effective PO and the non-SBFD downlink symbol in the time domain, the symbols in this interval are used to avoid interference between uplink transmission and downlink transmission.

[0317] ◆Example

[0318] Taking SBFD symbols as an example, as shown in Figure 12, time slot n includes multiple non-SBFD downlink symbols, and these non-SBFD downlink symbols only have downlink subbands; time slot n+1 includes multiple SBFD downlink symbols, and these SBFD downlink symbols have uplink subbands and downlink subbands. Figure 12(a) illustrates the case where a valid PO has not yet been defined, while Figure 12(b) illustrates the case where a valid PO has been defined.

[0319] In FIG12(b), for the case of switching from a non-SBFD downlink symbol in time slot n to a SBFD downlink symbol in time slot n+1, the first valid PO is within the uplink subband of the SBFD downlink symbol, and at least N POs are present after switching from the non-SBFD downlink symbol to the SBFD downlink symbol. gap Start with a symbol.

[0320]

Method 2

[0321] In "Method 2", this application considers the case of switching from non-SBFD uplink symbols or non-SBFD flexible symbols to SBFD symbols. The PO obtained by the SBFD configuration is defined from the frequency domain perspective and the time domain perspective respectively.

[0322] ◆Frequency domain perspective

[0323] From the frequency domain perspective, the present application may define the PO in the uplink subband of the SBFD symbol as a valid PO. The SBFD symbol here may include SBFD downlink symbols, SBFD uplink symbols, and SBFD flexible symbols.

[0324] That is, the first valid PO may be in the uplink subband of the SBFD symbol.

[0325] In this way, since the uplink subband can support uplink transmission, the PO in the uplink subband can support MsgA PUSCH transmission, so that the PO can be regarded as valid.

[0326] Optionally, the first valid PO is within the uplink subband of the SBFD symbol, and may include: all frequency domain resource units of the first valid PO are within the uplink subband of the SBFD symbol.

[0327] It is understandable that all frequency domain resource units of the first effective PO need to be within the uplink subband of the SBFD symbol. In this way, all frequency domain resource units of the first effective PO can support MsgA PUSCH transmission.

[0328] Optionally, the first valid PO is in the uplink subband of the SBFD symbol and may include:

[0329] Some frequency domain resource units of the first valid PO are in the uplink subband of the SBFD flexible symbol, and the remaining frequency domain resource units are in the downlink subband of the SBFD flexible symbol.

[0330] It is understandable that a portion of the frequency domain resource units of the first valid PO may be in the uplink subband of the SBFD symbol, and this portion of the frequency domain resource units can support MsgA PUSCH transmission. In this way, the present application can still use this portion of the frequency domain resource units to transmit MsgA PUSCH, without considering that the entire frequency domain resource units cannot be used for MsgA PUSCH transmission because the remaining frequency domain resource units are in the downlink subband, thereby helping to improve spectrum utilization.

[0331] ◆Time domain perspective

[0332] From a time domain perspective, the present application may define the PO after switching from a non-SBFD uplink symbol or a non-SBFD flexible symbol to a SBFD symbol as a valid PO.

[0333] That is, the first valid PO may start from a non-SBFD uplink symbol or a non-SBFD flexible symbol switching to a SBFD symbol.

[0334] It can be understood that the difference between "method 2" and "method 1" is that there is no at least the first preset number of symbols as an interval in the time domain.

[0335] The SBFD symbols here may include SBFD downlink symbols, SBFD uplink symbols, and SBFD flexible symbols.

[0336] In this way, since the non-SBFD uplink symbol or SBFD flexible symbol can originally support uplink transmission, when switching from the non-SBFD uplink symbol or SBFD flexible symbol to the SBFD symbol, there is no need to set an interval between the effective PO and the non-SBFD uplink symbol or non-SBFD flexible symbol in the time domain, which is beneficial to improving resource utilization.

[0337] ◆Example

[0338] Taking non-SBFD uplink symbols as an example, as shown in Figure 13, time slot n includes multiple non-SBFD uplink symbols, and these non-SBFD uplink symbols only have an uplink subband; time slot n+1 includes multiple SBFD downlink symbols, and these SBFD downlink symbols have both an uplink subband and a downlink subband. Figure 13(a) illustrates the case where a valid PO has not yet been defined, while Figure 13(b) illustrates the case where a valid PO has been defined.

[0339] In (b) of Figure 13, for the case of switching from the non-SBFD uplink symbol of time slot n to the SBFD downlink symbol of time slot n+1, the first valid PO is in the uplink subband of the SBFD downlink symbol and starts at the switch from the non-SBFD uplink symbol to the SBFD downlink symbol.

[0340]

Method 3

[0341] In "Method 3", this application considers the case of switching from SBFD symbols to non-SBFD flexible symbols. The PO obtained by SBFD configuration is defined from the perspective of time domain and frequency domain respectively.

[0342] ◆Time domain perspective

[0343] From a time domain perspective, the present application may define the PO within at least a first preset number of symbols after the SBFD symbol is switched to the non-SBFD flexible symbol as a valid PO.

[0344] That is, the valid PO obtained by the SBFD configuration is within at least a first preset number of symbols after the SBFD symbol is switched to the non-SBFD flexible symbol.

[0345] The SBFD symbols here may include SBFD downlink symbols, SBFD uplink symbols, and SBFD flexible symbols.

[0346] The first preset number of symbols may include N gap symbols.

[0347] It should be noted that, in combination with the above definition of "second valid PO", the second valid PO may include non-SBFD flexible symbols. However, under the SBFD configuration, the present application may use the PO within at least the first preset number of symbols after the SBFD symbol is switched to the non-SBFD flexible symbol as a valid PO, and this part of the valid PO can be regarded as a newly added valid PO under the second valid PO, and this part of the newly added valid PO is used to transmit the MsgA PUSCH, which is conducive to improving spectrum utilization efficiency.

[0348] ◆Frequency domain perspective

[0349] From the frequency domain perspective, the present application may define the first effective PO and the uplink subband of the SBFD symbol to have the same frequency domain position.

[0350] The SBFD symbol here can be understood as switching from the SBFD symbol to the SBFD symbol in the non-SBFD flexible symbol.

[0351] The SBFD symbols here may include SBFD downlink symbols, SBFD uplink symbols, and SBFD flexible symbols.

[0352] ◆Example

[0353] Taking SBFD symbols as SBFD downlink symbols as an example, as shown in Figure 14, time slot n includes multiple non-SBFD downlink symbols, and these non-SBFD downlink symbols only have downlink subbands; time slot n+1 includes multiple SBFD downlink symbols, and these SBFD downlink symbols have uplink subbands and downlink subbands; time slot n+2 includes multiple non-SBFD flexible symbols, and these non-SBFD flexible symbols have flexible subbands, which can be configured by the network to support uplink or downlink transmission. Figure 14(a) illustrates the case where a valid PO has not yet been defined, while Figure 14(b) illustrates the case where a valid PO has been defined.

[0354] In FIG14(b), for the case where the SBFD downlink symbol of time slot n+1 is switched to the non-SBFD flexible symbol of time slot n+2, the first valid PO is at least N times after the SBFD downlink symbol is switched to the non-SBFD flexible symbol. gap symbols, and has the same frequency domain position as the uplink subband of the SBFD downlink symbol.

[0355]

Method 4

[0356] In "Method 4", combined with the content in "II. Random Access Process" above, the network can configure the frequency domain position of the PO in the SBFD communication system.

[0357] Because the network may configure multiple frequency-domain POs (i.e., multiple FDM POs) at the same time-domain location, the POs obtained by SBFD configuration may contain multiple frequency-domain POs at the same time-domain location. For example, in Figure 7, there are n FDM POs at the same time-domain location.

[0358] At this time, for all frequency domain POs at the same time domain position, since some of the frequency domain POs may be in the uplink subband of the SBFD symbol and the rest of the frequency domain POs may be in the downlink subband, all frequency domain POs may be in the uplink subband of the SBFD symbol, and all frequency domain POs may be in the downlink subband of the SBFD symbol. Therefore, this application can be defined as follows:

[0359] ◆If all the frequency-domain POs are within the uplink subband of the SBFD symbol, then all the frequency-domain POs are valid POs.

[0360] That is to say, the first valid PO may be all frequency domain POs at the same time domain position, and all frequency domain POs are in the uplink subband of the SBFD downlink symbol.

[0361] In this way, since the uplink subband can support uplink transmission, all frequency-domain POs in the uplink subband can support MsgA PUSCH transmission, so that all frequency-domain POs can be regarded as valid.

[0362] ◆If there is a part of the frequency domain POs among all the frequency domain POs that are within the uplink sub-band of the SBFD symbol, then the part of the frequency domain POs is a valid PO.

[0363] That is to say, the first valid PO may be a portion of the frequency domain POs that are only within the uplink subband of the SBFD symbol among all the frequency domain POs at the same time domain position.

[0364] It can be understood that a part of the frequency domain PO of the effective PO may be in the uplink subband of the SBFD symbol, and this part of the frequency domain PO can support MsgA PUSCH transmission.

[0365] In this way, the present application can still use this part of the frequency domain PO to transmit MsgA PUSCH, instead of assuming that all frequency domain POs at the same time domain position cannot transmit MsgA PUSCH because the remaining frequency domain POs are in the downlink subband, which is beneficial to improving spectrum utilization.

[0366]

Method 5

[0367] In "Method 5", combined with the content in "II. Random Access Process" above, the network can configure the time domain position of the PO in the SBFD communication system.

[0368] Since the PO configured by the network may include multiple symbols, and these symbols may include SBFD symbols and / or non-SBFD symbols, for the PO obtained by the SBFD configuration, some of the symbols in the PO may be SBFD symbols while the rest may be non-SBFD symbols, all symbols may be SBFD symbols, or all symbols may be non-SBFD symbols. In this regard, the present application may define as follows:

[0369] ◆If all symbols of the PO are SBFD symbols and the PO is in the uplink subband of the SBFD symbol, then the PO is a valid PO; that is, all symbols of the first valid PO are SBFD symbols.

[0370] If some symbols of a PO are SBFD symbols, and the PO is in an uplink subband of SBFD symbols, and the remaining symbols are non-SBFD uplink symbols or non-SBFD flexible symbols, then the PO is a valid PO; that is, some symbols of the first valid PO are SBFD symbols, and the remaining symbols are non-SBFD uplink symbols or non-SBFD flexible symbols;

[0371] ◆Otherwise, the PO is invalid.

[0372] In this way, since the uplink subband of the SBFD symbol can support uplink transmission, and the non-SBFD uplink symbol or non-SBFD flexible symbol can also support uplink transmission, although the PO symbols exist across symbols, since they can all support MsgA PUSCH transmission, the PO can be regarded as valid.

[0373] 4) Configuration process of PO obtained by SBFD configuration

[0374] It should be noted that the first valid PO of the present application can be configured using 2-step random access channel configuration information.

[0375] The 2-step random access channel configuration information may be transmitted by the network through network signaling, thereby enabling the network to configure the first valid PO through the 2-step random access channel configuration information.

[0376] For example, in conjunction with the content in "PUSCH Time-Frequency Resources" in "II. Random Access Procedure" above, the 2-step random access channel configuration information may include a higher-level parameter msgA-PUSCH-Config or a higher-level parameter separateMsgA-PUSCH-Config. The higher-level parameter msgA-PUSCH-Config or the higher-level parameter separateMsgA-PUSCH-Config may include a parameter msgAPUSCH-timeDomainOffset, a parameter nrofMsgAPOperSlot, a parameter startSymbolAndLengthMsgAPO, a parameter frequencyStartMsgAPUSCH, and the like.

[0377] Since the second valid PO is also configured using 2-step random access channel configuration information, this application needs to explain the 2-step random access channel configuration information used by the first valid PO and the 2-step random access channel configuration information used by the second valid PO.

[0378] Optionally, the first valid PO and the second valid PO are configured using the same 2-step random access channel configuration information.

[0379] In this way, since the same 2-step random access channel configuration information is used for configuration, the network can use the same set of 2-step random access channel configuration information to uniformly configure PO to the traditional communication system and the SBFD communication system, thereby improving the compatibility of the communication system.

[0380] Optionally, the first valid PO and the second valid PO are each configured using different 2-step random access channel configuration information.

[0381] In this way, since different 2-step random access channel configuration information is used for configuration, the network can use different 2-step random access channel configuration information to independently configure PO to the traditional communication system and the SBFD communication system, thereby improving the stability of the communication system.

[0382] Optionally, if the SBFD flexible symbol where the first valid PO is located comes from a non-SBFD flexible symbol, the PO obtained by the SBFD configuration and the PO obtained by the non-SBFD configuration are configured using the same 2-step random access channel configuration information.

[0383] It is understandable that when the network configures non-SBFD flexible symbols as SBFD flexible symbols and configures valid PO on the SBFD flexible symbols, since the configuration from non-SBFD flexible symbols to SBFD flexible symbols requires switching from the traditional communication system to the SBFD communication system, and since the non-SBFD flexible symbols and the SBFD flexible symbols are configured to support uplink transmission, in order to minimize the time required for switching, or to avoid the inability to continue to support communication due to switching between different communication systems, the network can use the same set of 2-step random access channel configuration information to uniformly configure PO to the traditional communication system and the SBFD communication system, which is beneficial to improving the compatibility of the communication system.

[0384] Optionally, if the SBFD flexible symbol where the first valid PO is located comes from a non-SBFD flexible symbol, the PO obtained by the SBFD configuration and the PO obtained by the non-SBFD configuration are configured using different 2-step random access channel configuration information.

[0385] It is understandable that since the configuration from non-SBFD flexible symbols to SBFD flexible symbols requires switching from the traditional communication system to the SBFD communication system, but because different communication systems may have poor compatibility, the network can use different random access channel configuration information to independently configure PO to the traditional communication system and the SBFD communication system, which is beneficial to improve the stability of the communication system and reduce the complexity of the communication system.

[0386] 5) Mapping relationship between PO and DMRS resources

[0387] Combined with the content of "Mapping Relationship between PO and DMRS Resources" in "II. Random Access Process" above, it can be seen that the network may configure the mapping relationship between PO and DMRS resources to implement MsgA PUSCH transmission. Therefore, the MsgA PUSCH transmission in the SBFD communication system discussed in this application also requires the study of the mapping relationship between PO and DMRS resources.

[0388] Since this application involves "first valid PO" and "second valid PO", this application can flexibly select the following two methods to map PO and DMRS resources according to scenario requirements / network configuration, etc., so as to improve the flexibility of MsgA PUSCH transmission.

[0389] Method A

[0390] In "method A", the first valid PO can be used together with the second valid PO to uniformly perform mapping between PO and DMRS resources.

[0391] That is to say, the first valid PO and the second valid PO are taken as a whole PO to uniformly perform mapping between PO and DMRS resources.

[0392] In this way, since the mapping between PO and DMRS resources is performed in a joint and unified manner, the DMRS resources can support SBFD and non-SBFD, thereby improving the compatibility of the communication system.

[0393] Optionally, the mapping relationship between the overall PO and DMRS resources may be performed in the following order:

[0394] First, the frequency domain resource index order of FDM PO is increasing;

[0395] Secondly, within a PO, the DMRS resource index is arranged in ascending order; wherein the DMRS resource index is first determined according to the ascending order of the DMRS port index, and then determined according to the ascending order of the DMRS sequence index;

[0396] Again, the order of the time domain resource index of the TDM PO within a PUSCH time slot is increasing;

[0397] Finally, the order of PUSCH slot indices is increasing.

[0398]

Method B

[0399] In "method B", the first valid PO and the second valid PO can independently perform mapping between PO and DMRS resources.

[0400] That is, the first valid PO is mapped to the DMRS resource alone, and the second valid PO is mapped to the DMRS resource alone.

[0401] In this way, since the mapping between PO and DMRS resources is performed independently, although the DMRS resources cannot support SBFD and non-SBFD at the same time, the stability of the communication system can be guaranteed and the complexity of the communication system can be reduced.

[0402] Optionally, the first valid PO or the second valid PO may be mapped to the DMRS resource separately in the following order:

[0403] First, the frequency domain resource index order of FDM PO is increasing;

[0404] Secondly, within a PO, the DMRS resource index is arranged in ascending order; wherein the DMRS resource index is first determined according to the ascending order of the DMRS port index, and then determined according to the ascending order of the DMRS sequence index;

[0405] Again, the order of the time domain resource index of the TDM PO within a PUSCH time slot is increasing;

[0406] Finally, the order of PUSCH slot indices is increasing.

[0407] 4) Traditional RO

[0408]

describe

[0409] For PRACH transmission in a traditional communication system (such as a TDD system or an FDD system), the traditional communication system will configure an RO and use the RO to transmit the RA preamble / random access request message. In order to distinguish it from the PRACH transmission in the SBFD communication system below, the present application may refer to the RO configured by the traditional communication system as a "traditional / original (legacy) RO". Optionally, the RO obtained by the non-SBFD configuration may include a valid RO and / or an invalid RO. Among them, a valid RO can be used to transmit the RA preamble / random access request message / MsgA PRACH, while an invalid RO cannot be used to transmit the RA preamble / random access request message / MsgA PRACH.

[0410] In addition, in order to distinguish from the "first valid RO" that appears later, the present application may refer to the valid ROs in the traditional / original ROs as "second valid ROs".

[0411]

Second effective RO

[0412] Combined with the above contents of "SSB-mapped RO and SSB-mapped RA preamble", the second valid RO can be defined as follows:

[0413] The second valid RO may be within the PRACH time slot and within a non-SBFD uplink symbol (ie, an uplink symbol) or a non-SBFD flexible symbol (ie, a flexible symbol); or,

[0414] The second valid RO may be within the PRACH time slot and start no earlier than the fourth preset number of symbols after the last non-SBFD downlink symbol (i.e., the last downlink symbol), and / or start no earlier than the fourth preset number of symbols after the SSB symbol; or

[0415] The second valid RO may be within the PRACH time slot and within the uplink symbol or the flexible symbol, and may start no earlier than the fourth preset number of symbols after the last downlink symbol, and / or may start no earlier than the fourth preset number of symbols after the SSB symbol.

[0416] The phrase "starting no earlier than the fourth preset number of symbols after the non-SBFD downlink symbol" can be understood as the second valid RO starting from at least the fourth preset number of symbols after the last non-SBFD downlink symbol.

[0417] The phrase "starting no earlier than the fourth preset number of symbols after the SSB symbol" can be understood as the second valid RO starting from at least the fourth preset number of symbols after the SSB symbol.

[0418] Optionally, the fourth preset number of symbols may include N gap symbols.

[0419] Optionally, the second valid RO may be configured using random access channel configuration information.

[0420] The random access channel configuration information may be transmitted by the network through network signaling, thereby enabling the network to configure the second valid RO through the random access channel configuration information.

[0421] For example, in conjunction with the content in "PRACH Time-Frequency Resources" in "II. Random Access Procedure" above, the random access channel configuration information may include a higher-layer parameter RACH-ConfigGeneric. The higher-layer parameter RACH-ConfigGeneric may include parameters such as prach-ConfigurationIndex, msg1-FrequencyStart, and msg1-FDM.

[0422] 5) RO obtained by SBFD configuration

[0423]

describe

[0424] For PRACH transmission in an SBFD communication system, the SBFD communication system configures an RO and transmits the RA preamble / random access request message through the RO. To distinguish it from the PRACH transmission in the conventional communication system described above, the present application may refer to the RO configured by the SBFD communication system as the "RO obtained by SBFD configuration."

[0425] Optionally, the RO obtained by SBFD configuration may include a valid RO and / or an invalid RO, wherein a valid RO may be used to transmit RA preamble / random access request message / MsgA PRACH, while an invalid RO cannot be used to transmit RA preamble / random access request message / MsgA PRACH.

[0426] In addition, in order to distinguish from the "second valid RO" mentioned above, the present application may refer to the valid ROs obtained by SBFD configuration as "first valid ROs".

[0427]

First effective RO

[0428] Different from the content about "valid RO" in the above "SSB mapped RO and SSB mapped RA preamble", this application needs to specifically define "first valid RO". That is, this application needs to define which ROs can be used as valid ROs from the ROs obtained by SBFD configuration.

[0429] The following provides multiple definition methods, wherein each method can be independent of each other, can be interrelated, or can be combined to form a new method to adapt to various scenario requirements and improve the flexibility of PRACH transmission.

[0430] Method 1

[0431] In "Scheme 1", this application considers the case of switching from non-SBFD downlink symbols to SBFD symbols. The RO obtained by SBFD configuration is defined from the frequency domain perspective and the time domain perspective respectively.

[0432] ◆Frequency domain perspective

[0433] From the perspective of frequency domain, the present application may define the RO in the uplink subband of the SBFD symbol as a valid RO. The SBFD symbol here may include SBFD downlink symbols, SBFD uplink symbols, and SBFD flexible symbols.

[0434] That is, the first valid RO may be in the uplink subband of the SBFD symbol.

[0435] In this way, since the uplink subband can support uplink transmission, the RO in the uplink subband can support the transmission of the RA preamble / random access request message, so that the RO can be regarded as valid.

[0436] Optionally, the first valid RO is within the uplink subband of the SBFD symbol, which may include: all frequency domain resource units of the first valid RO are within the uplink subband of the SBFD symbol.

[0437] The frequency domain resource unit may be a subcarrier, RE or RB, etc.

[0438] For example, taking the frequency domain resource unit as an RB, all RBs of the first valid RO are in the uplink subband of the SBFD symbol.

[0439] It is understandable that all RBs of the first valid RO need to be within the uplink subband of the SBFD symbol. In this way, all RBs of the first valid RO can support uplink transmission.

[0440] Optionally, the first valid RO is in the uplink subband of the SBFD symbol and may include:

[0441] A portion of the frequency domain resource units of the first valid RO is located in the uplink subband of the SBFD flexible symbol, and the remaining portion of the frequency domain resource units is located in the downlink subband of the SBFD flexible symbol.

[0442] The frequency domain resource unit may be a subcarrier, RE or RB, etc.

[0443] For example, taking the frequency domain resource unit as an RB, part of the RBs of the first valid RO is in the uplink subband of the SBFD symbol, and the remaining RBs are in the downlink subband of the SBFD flexible symbol.

[0444] It is understandable that a portion of the RBs in the first valid RO may be in the uplink subband of the SBFD symbol, and this portion of the RBs can support uplink transmission. In this way, the present application can still use this portion of the RBs to transmit PRACH, without considering that the entire RB cannot be used for uplink transmission because the remaining RBs are in the downlink subband, thereby improving spectrum utilization.

[0445] ◆Time domain perspective

[0446] From the perspective of time domain, the present application may define a RO that starts no earlier than a preset number of symbols after the non-SBFD downlink symbol switches to the SBFD symbol as a valid RO.

[0447] That is, the first valid RO may start no earlier than the third preset number of symbols after the non-SBFD downlink symbol is switched to the SBFD symbol.

[0448] The start time is no earlier than a preset number of symbols after the non-SBFD downlink symbol is switched to the SBFD symbol. This can be understood as the first valid RO starting at least a preset number of symbols after the non-SBFD downlink symbol is switched to the SBFD symbol.

[0449] The SBFD symbols here may include SBFD downlink symbols, SBFD uplink symbols, and SBFD flexible symbols.

[0450] The third preset number of symbols may include N gap symbols.

[0451] In this way, since there is at least a third preset number of symbols between the first valid RO and the non-SBFD downlink symbol in the time domain, the symbols in this interval are used to avoid interference between uplink transmission and downlink transmission.

[0452] Method 2

[0453] In "Scheme 2", this application considers the case of switching from non-SBFD uplink symbols or non-SBFD flexible symbols to SBFD symbols. The RO obtained by SBFD configuration is defined from the frequency domain perspective and the time domain perspective respectively.

[0454] ◆Frequency domain perspective

[0455] From the perspective of frequency domain, the present application may define the RO in the uplink subband of the SBFD symbol as a valid RO. The SBFD symbol here may include SBFD downlink symbols, SBFD uplink symbols, and SBFD flexible symbols.

[0456] That is, the first valid RO may be in the uplink subband of the SBFD symbol.

[0457] In this way, since the uplink subband can support uplink transmission, the RO in the uplink subband can support the transmission of the RA preamble / random access request message, so that the RO can be regarded as valid.

[0458] Optionally, the first valid RO is in the uplink subband of the SBFD symbol, which may include: a frequency domain resource unit of the first valid RO is in the uplink subband of the SBFD symbol.

[0459] It is understandable that all frequency domain resource units of the first effective RO need to be within the uplink subband of the SBFD symbol. In this way, all frequency domain resource units of the first effective RO can support uplink transmission.

[0460] Optionally, the first valid RO is in the uplink subband of the SBFD symbol and may include:

[0461] A portion of the frequency domain resource units of the first valid RO is located in the uplink subband of the SBFD flexible symbol, and the remaining portion of the frequency domain resource units is located in the downlink subband of the SBFD flexible symbol.

[0462] It is understandable that a portion of the frequency domain resource units of the first valid RO may be in the uplink subband of the SBFD symbol, and this portion of the frequency domain resource units can support uplink transmission. In this way, the present application can still use this portion of the frequency domain resource units to transmit PRACH, without considering that the entire frequency domain resource units cannot be used for uplink transmission because the remaining frequency domain resource units are in the downlink subband, thereby helping to improve spectrum utilization.

[0463] ◆Time domain perspective

[0464] From a time domain perspective, the present application may define the RO after switching from a non-SBFD uplink symbol or a non-SBFD flexible symbol to a SBFD symbol as a valid RO.

[0465] That is, the first valid RO may start from a non-SBFD uplink symbol or a non-SBFD flexible symbol switching to a SBFD symbol.

[0466] It can be understood that the difference between “Mode 2” and “Mode 1” is that there is no at least a third preset number of symbols as an interval in the time domain.

[0467] The SBFD symbols here may include SBFD downlink symbols, SBFD uplink symbols, and SBFD flexible symbols.

[0468] In this way, since the non-SBFD uplink symbols or SBFD flexible symbols can originally support uplink transmission, when switching from non-SBFD uplink symbols or SBFD flexible symbols to SBFD symbols, there is no need to set an interval between the effective RO and the non-SBFD uplink symbols or non-SBFD flexible symbols in the time domain, which is conducive to improving resource utilization.

[0469]

Method 3

[0470] In "Scheme 3", this application considers the case of switching from SBFD symbols to non-SBFD flexible symbols. The RO obtained by SBFD configuration is defined from the perspective of time domain and frequency domain respectively.

[0471] ◆Time domain perspective

[0472] From a time domain perspective, the present application may define an RO that is within at least a preset number of symbols after the SBFD symbol is switched to a non-SBFD flexible symbol as a valid RO.

[0473] That is, the valid RO obtained by the SBFD configuration is within at least a third preset number of symbols after the SBFD symbol is switched to the non-SBFD flexible symbol.

[0474] The SBFD symbols here may include SBFD downlink symbols, SBFD uplink symbols, and SBFD flexible symbols.

[0475] The third preset number of symbols may include N gap symbols.

[0476] It should be noted that, in conjunction with the above definition of "second valid RO", the second valid RO may include non-SBFD flexible symbols. However, in an SBFD configuration, the present application may use as valid ROs the ROs within at least a third preset number of symbols after the SBFD symbol is switched to a non-SBFD flexible symbol. These valid ROs can be considered as newly added valid ROs under the second valid RO, and these newly added valid ROs can be used to transmit PRACH, thereby improving spectrum utilization efficiency.

[0477] ◆Frequency domain perspective

[0478] From the perspective of frequency domain, the present application may define that the first effective RO and the uplink subband of the SBFD symbol have the same frequency domain position.

[0479] The SBFD symbol here can be understood as switching from the SBFD symbol to the SBFD symbol in the non-SBFD flexible symbol.

[0480] The SBFD symbols here may include SBFD downlink symbols, SBFD uplink symbols, and SBFD flexible symbols.

[0481]

Method 4

[0482] In "Method 4", combined with the content in "II. Random Access Procedure" above, the network can configure the frequency domain position of the RO in the SBFD communication system through the parameters msg1-FrequencyStart and msg1-FDM in the high-layer parameter RACH-ConfigGeneric.

[0483] Since the parameter msg1-FDM configures multiple frequency domain ROs at the same time domain position, in this case, multiple frequency domain ROs at the same time domain position will exist in the RO obtained by the SBFD configuration.

[0484] At this time, for all frequency domain ROs at the same time domain position, since some of the frequency domain ROs may be in the uplink subband of the SBFD symbol and the rest of the frequency domain ROs are in the downlink subband, all frequency domain ROs may be in the uplink subband of the SBFD symbol, or all frequency domain ROs may be in the downlink subband of the SBFD symbol. Therefore, the present application can be defined as follows:

[0485] If all frequency-domain ROs are within the uplink subband of the SBFD symbol, then all frequency-domain ROs are valid ROs.

[0486] That is, the first valid RO may be all frequency domain ROs at the same time domain position, and all the frequency domain ROs are in the uplink subband of the SBFD downlink symbol.

[0487] In this way, since the uplink subband can support uplink transmission, all frequency-domain ROs in the uplink subband can support the transmission of RA preamble / random access request message, so that all frequency-domain ROs can be regarded as valid.

[0488] ◆If a portion of all frequency-domain ROs is located within the uplink subband of the SBFD symbol, then the portion of frequency-domain ROs is a valid RO.

[0489] That is, the first valid RO may be a portion of the frequency domain ROs located only within the uplink subband of the SBFD symbol among all the frequency domain ROs located at the same time domain position.

[0490] It can be understood that a portion of the effective RO may be in the uplink sub-band of the SBFD symbol in the frequency domain, and this portion of the frequency domain RO may support uplink transmission.

[0491] In this way, the present application can still use this part of the frequency domain RO to transmit PRACH, instead of assuming that all frequency domain ROs at the same time domain position cannot perform uplink transmission because the remaining frequency domain ROs are in the downlink subband, thereby improving spectrum utilization.

[0492] Method 5

[0493] In "Method 5", combined with the content in "II. Random Access Procedure" above, the network can configure the time domain position of the RO in the SBFD communication system through the parameter prach-ConfigurationIndex in the higher-layer parameter RACH-ConfigGeneric.

[0494] Since the RO configured by the parameter prach-ConfigurationIndex may include multiple symbols, and these symbols may include SBFD symbols and / or non-SBFD symbols, for the RO obtained by the SBFD configuration, some symbols in the RO may be SBFD symbols while the rest may be non-SBFD symbols, all symbols may be SBFD symbols, or all symbols may be non-SBFD symbols. In this regard, the present application may define as follows:

[0495] ◆If some symbols of a RO are in the uplink subband of SBFD symbols, and the remaining symbols of the RO are in non-SBFD uplink symbols or non-SBFD flexible symbols, then the RO is a valid RO.

[0496] That is, some symbols of the first valid RO are in uplink subbands of SBFD symbols, and the remaining symbols are in non-SBFD uplink symbols or non-SBFD flexible symbols.

[0497] In this way, since the uplink subband of the SBFD symbol can support uplink transmission, and the non-SBFD uplink symbol or non-SBFD flexible symbol can also support uplink transmission, although the RO symbols exist across symbols, they can support the transmission of the RA preamble / random access request message, so the RO can be regarded as valid.

[0498] 4) Mapping relationship between RO and SSB

[0499] Combined with the content of "II. Random Access Process" above, it can be seen that the network device will configure the mapping relationship between RO and SSB through the high-level parameter ssb-perRACH-OccasionAndCB-PreamblesPerSSB to implement PRACH transmission. Therefore, PRACH transmission in the SBFD communication system discussed in this application also requires studying the mapping relationship between RO and SSB.

[0500] Optionally, the first valid RO may be jointly mapped with the second valid RO to perform unified mapping between the RO and the SSB.

[0501] That is, the first valid RO and the second valid RO are taken as a whole RO to uniformly perform mapping between the RO and the SSB.

[0502] In this way, since the mapping between RO and SSB is performed in a joint and unified manner, SSB can support SBFD and non-SBFD, thereby improving the compatibility of the communication system.

[0503] Optionally, the first valid RO and the second valid RO can independently perform mapping between RO and SSB.

[0504] That is, the first valid RO is mapped solely with the SSB, and the second valid RO is mapped solely with the SSB.

[0505] In this way, since the mapping between RO and SSB is performed independently, although SSB cannot support SBFD and non-SBFD, it can ensure the stability of the communication system and reduce the complexity of the communication system.

[0506] 5) RO configuration process obtained by SBFD configuration

[0507] It should be noted that the first valid RO of the present application can be configured using random access channel configuration information.

[0508] The random access channel configuration information may be transmitted by the network through network signaling, thereby enabling the network to configure the second valid RO through the random access channel configuration information.

[0509] For example, in conjunction with the content in "II. Random Access Procedure" above, the random access channel configuration information may include a higher-layer parameter RACH-ConfigGeneric, which may include parameters such as prach-ConfigurationIndex, msg1-FrequencyStart, and msg1-FDM.

[0510] Since the second valid RO is also configured using the random access channel configuration information, this application needs to explain the random access channel configuration information used by the first valid RO and the random access channel configuration information used by the second valid RO.

[0511] Optionally, the first valid RO and the second valid RO may be configured using the same random access channel configuration information.

[0512] In this way, since the same random access channel configuration information is used for configuration, the network can use the same set of random access channel configuration information to uniformly configure ROs for the traditional communication system and the SBFD communication system, thereby facilitating improved compatibility of the communication systems.

[0513] Optionally, the first valid RO and the second valid RO may be configured using different random access channel configuration information respectively.

[0514] In this way, since different random access channel configuration information is used for configuration, the network can use different random access channel configuration information to independently configure RO to the traditional communication system and the SBFD communication system, thereby improving the stability of the communication system and reducing the complexity of the communication system.

[0515] Optionally, if the SBFD flexible symbol where the first valid RO is located comes from a non-SBFD flexible symbol, the RO obtained by the SBFD configuration and the RO obtained by the non-SBFD configuration are configured using the same random access channel configuration information.

[0516] It should be noted that when the network configures non-SBFD flexible symbols as SBFD flexible symbols and configures valid RO on the SBFD flexible symbols, since the configuration from non-SBFD flexible symbols to SBFD flexible symbols requires switching from the traditional communication system to the SBFD communication system, and since the non-SBFD flexible symbols and the SBFD flexible symbols are configured to support uplink transmission, in order to minimize the time required for switching, or to avoid the inability to continue to support communication due to switching between different communication systems, the network can use the same set of random access channel configuration information to uniformly configure RO to the traditional communication system and the SBFD communication system, which is beneficial to improving the compatibility of the communication system.

[0517] Optionally, if the SBFD flexible symbol where the first valid RO is located comes from a non-SBFD flexible symbol, the RO obtained by SBFD configuration and the RO obtained by non-SBFD configuration are configured using different random access channel configuration information.

[0518] It should be noted that since the configuration from non-SBFD flexible symbols to SBFD flexible symbols requires switching from the traditional communication system to the SBFD communication system, but since different communication systems may have poor compatibility, the network can use different random access channel configuration information to independently configure RO to the traditional communication system and the SBFD communication system, which is beneficial to improving the stability of the communication system and reducing the complexity of the communication system.

[0519] 6) Mapping rate between PRU and RA preamble

[0520] Combined with the content of "Mapping Ratio between PRU and RA Preamble" in "II. Random Access Procedure" above, it can be seen that the network may configure the mapping ratio between PRU and RA preamble to implement MsgA PUSCH transmission. Therefore, MsgA PUSCH transmission in the SBFD communication system discussed in this application also requires the study of the mapping ratio between PRU and RA preamble.

[0521] Since this application involves "first valid PO", "second valid PO", "first valid RO" and "second valid RO", this application can flexibly select the following multiple methods to determine the mapping rate between PRU and RA preamble according to scenario requirements / network configuration, etc., so as to improve the flexibility of MsgA PUSCH transmission.

[0522]

Method a

[0523] In "mode a", the mapping ratio between the PRU corresponding to the first valid PO and the preamble associated with the first valid RO is the same as the mapping ratio between the PRU corresponding to the second valid PO and the preamble associated with the second valid RO.

[0524] In this way, since the mapping rates are the same, the network can use the same set of high-level parameters to uniformly configure the mapping rates for the traditional communication system and the SBFD communication system, thereby improving the compatibility of the communication system and reducing system complexity.

[0525] The first valid PO and the first valid RO are in a first SSB and RO association pattern period, and the second valid PO and the second valid RO are in a second SSB and RO association pattern period.

[0526] Optionally, the first SSB and RO association pattern period and the second SSB and RO association pattern period may be the same SSB and RO association pattern period or different SSB and RO association pattern periods.

[0527] Optionally, if the RA preambles associated with a preset number of second valid ROs are mapped to a PRU corresponding to a second valid PO within the second SSB and RO association pattern period, then the RA preambles associated with the preset number of first valid ROs are mapped to a PRU corresponding to a first valid PO within the first SSB and RO association pattern period.

[0528] For example, the preset number is M=ceil(N preamble / N pru ) as an example, in the same SSB and RO association pattern period, the continuous N associated with the second valid RO in the PRACH time slot preamble RA preambles are mapped to the PRUs corresponding to the Npru second valid POs. At this time, the mapping rate between the PRUs corresponding to the second valid POs and the RA preambles associated with the second valid ROs is M = ceil (N preamble / N pru ).

[0529] In this way, the mapping rate between the PRU corresponding to the first valid PO and the preamble code associated with the first valid RO is M=ceil(N preamble / N pru ). That is, the RA preambles associated with the M first valid ROs are mapped to the PRU corresponding to one first valid PO.

[0530]

Method b

[0531] In "mode b", the mapping ratio between the PRU corresponding to the first valid PO and the preamble associated with the first valid RO is different from the mapping ratio between the PRU corresponding to the second valid PO and the preamble associated with the second valid RO.

[0532] In this way, since the mapping rates are different, the network can use different sets of high-layer parameters to separately configure the mapping rates for the traditional communication system and the SBFD communication system, thereby improving the stability of the communication system.

[0533] The first valid PO and the first valid RO are in a first SSB and RO association pattern period, and the second valid PO and the second valid RO are in a second SSB and RO association pattern period.

[0534] Optionally, the first SSB and RO association pattern period and the second SSB and RO association pattern period may be the same SSB and RO association pattern period or different SSB and RO association pattern periods.

[0535] Optionally, within a first SSB and RO association pattern period, RA preambles associated with a first preset number of first valid ROs are mapped to a PRU corresponding to a first valid PO; within a second SSB and RO association pattern period, RA preambles associated with a second preset number of second valid ROs are mapped to a PRU corresponding to a second valid PO; wherein the first preset number is not equal to the second preset number.

[0536] For example, the first preset number is M1=ceil(N preamble_1 / N pru_1 ) and the second preset number is M2=ceil(N preamble_2 / N pru_2 ), for example, in the first SSB and RO association pattern period, the first valid RO in the PRACH time slot is associated with the continuous N preamble_1 RA preambles are mapped to N pru_1 The mapping ratio between the PRU corresponding to the first valid PO and the RA preamble associated with the first valid RO is M1=ceil(N preamble_1 / N pru_1 ).

[0537] In the second SSB and RO association pattern period, the continuous N associated with the second valid RO in the PRACH time slot preamble_2 RA preambles are mapped to N pru_2 The mapping ratio between the PRU corresponding to the second valid PO and the RA preamble associated with the second valid RO is M2=ceil(N preamble_2 / N pru_2 ), and M1≠M2.

[0538]

Method c

[0539] In "method c", the mapping ratio between the PRU corresponding to the first valid PO and the preamble associated with the first valid RO, and the mapping ratio between the PRU corresponding to the second valid PO and the preamble associated with the second valid RO are calculated independently.

[0540] In this way, the network can use different sets of high-layer parameters to separately configure the mapping rates for the traditional communication system and the SBFD communication system, thereby improving the stability of the communication system.

[0541] The first valid PO and the first valid RO are in the third SSB and RO association pattern period, and the second valid PO and the second valid RO are in the fourth SSB and RO association pattern period.

[0542] Optionally, the third SSB and RO association pattern period and the fourth SSB and RO association pattern period are different SSB and RO association pattern periods.

[0543] Optionally, within a third SSB and RO association pattern period, RA preambles associated with a third preset number of first valid ROs are mapped to a PRU corresponding to a first valid PO; within a second SSB and RO association pattern period, RA preambles associated with a fourth preset number of second valid ROs are mapped to a PRU corresponding to a second valid PO; wherein the third preset number is not equal to or equal to the fourth preset number.

[0544] For example, the third preset number is M3=ceil(N preamble_3 / N pru_3 ) and the fourth preset number is M4=ceil(N preamble_4 / N pru_4 ), for example, in the third SSB and RO association pattern period, the first valid RO in the PRACH time slot is associated with the continuous N preamble_3 RA preambles are mapped to N pru_3 The mapping ratio between the PRU corresponding to the first valid PO and the RA preamble associated with the first valid RO is M3=ceil(N preamble_3 / N pru_3 ).

[0545] In the fourth SSB and RO association pattern period, the continuous N associated with the second valid RO in the PRACH time slot preamble_4 RA preambles are mapped to N pru_4 The mapping ratio between the PRU corresponding to the second valid PO and the RA preamble associated with the second valid RO is M4=ceil(N preamble_4 / N pru_4 ), and M3≠M4 or M3=M4.

[0546]

Method d

[0547] In "method d", the mapping ratio between the PRU corresponding to the first valid PO and the preamble associated with the first valid RO, and the mapping ratio between the PRU corresponding to the second valid PO and the preamble associated with the second valid RO are calculated jointly.

[0548] In this way, the network can use the same set of high-level parameters to uniformly configure mapping rates for traditional communication systems and SBFD communication systems, thereby improving the compatibility of communication systems and reducing system complexity.

[0549] The first valid PO, the second valid PO, the first valid RO and the second valid RO are all in the same SSB and RO association pattern period.

[0550] Optionally, within the same SSB and RO association pattern period, the RA preamble associated with the first valid RO and the RA preamble associated with the second valid RO are jointly mapped to the PRU corresponding to the first valid PO and the PRU corresponding to the second valid PO.

[0551] Furthermore, the sum of the RA preamble associated with the first valid RO and the RA preamble associated with the second valid RO is proportional to the sum of the PRU corresponding to the first valid PO and the PRU corresponding to the second valid PO. The proportional relationship can be a direct proportional relationship or an inverse proportional relationship, and there is no limitation on this.

[0552] 3. Example of an uplink data communication method

[0553]

describe

[0554] In conjunction with the above content, the following describes an uplink data communication method according to an embodiment of the present application, taking the interaction between a terminal device and a network device as an example. The terminal device may be a chip, a chip module, or a communication module, and the network device may be a chip, a chip module, or a communication module.

[0555] FIG15 is a flow chart of an uplink data communication method according to an embodiment of the present application, which specifically includes the following steps:

[0556] S1510 : The terminal device performs uplink data transmission of 2-step random access according to the first valid PO obtained by SBFD configuration.

[0557] Correspondingly, the network device performs 2-step random access uplink data reception according to the first valid PO obtained by the SBFD configuration.

[0558] It should be noted that “SBFD”, “PO”, etc. can be found in the above contents for details and will not be elaborated on here.

[0559] Since the uplink data communication of 2-step random access requires the use of PO, and the traditional PO is usually obtained by non-SBFD configuration, the present application can configure SBFD through the network and obtain the PO obtained by the SBFD configuration, and then perform uplink data communication based on the obtained valid PO, thereby combining SBFD with uplink data communication to achieve enhanced 2-step random access uplink data communication.

[0560] Some possible implementations

[0561] In combination with the above content, some possible implementation methods are described below. For other methods not described in detail, please refer to the above content and will not be elaborated on here.

[0562] Optionally, the first valid PO is in the uplink subband of the SBFD symbol.

[0563] Optionally, the first valid PO is in an uplink subband of the SBFD symbol, including:

[0564] All frequency domain resource units of the first valid PO are within the uplink subband of the SBFD symbol.

[0565] Optionally, the first valid PO is in an uplink subband of the SBFD symbol, including:

[0566] Some frequency domain resource units of the first valid PO are in the uplink subband of the SBFD flexible symbol, and the remaining frequency domain resource units are in the downlink subband of the SBFD flexible symbol.

[0567] Optionally, the first valid PO starts no earlier than the first preset number of symbols after the non-SBFD downlink symbol is switched to the SBFD symbol.

[0568] Optionally, all symbols of the first valid PO are SBFD symbols.

[0569] Optionally, some symbols of the first valid PO are SBFD symbols, and the remaining symbols are non-SBFD uplink symbols or non-SBFD flexible symbols.

[0570] Optionally, the first valid PO and the second valid PO are configured using the same 2-step random access channel configuration information; or,

[0571] The first valid PO and the second valid PO are each configured using different 2-step random access channel configuration information.

[0572] Optionally, the first valid PO and the second valid PO are jointly and uniformly mapped to the demodulation reference signal DMRS resources; or,

[0573] The first valid PO and the second valid PO independently perform mapping between PO and DMRS resources.

[0574] Optionally, a mapping ratio between a physical uplink shared channel resource unit PRU corresponding to the first valid PO and a preamble associated with the first valid RO is the same as a mapping ratio between a PRU corresponding to the second valid PO and a preamble associated with the second valid RO; or

[0575] A mapping ratio between the PRU corresponding to the first valid PO and the preamble associated with the first valid RO is different from a mapping ratio between the PRU corresponding to the second valid PO and the preamble associated with the second valid RO;

[0576] The first valid PO and the first valid RO are in the first synchronization signal block SSB and RO associated pattern period, and the second valid PO and the second valid RO are in the second SSB and RO associated pattern period.

[0577] Optionally, a mapping ratio between a PRU corresponding to a first valid PO and a preamble associated with a first valid RO, and a mapping ratio between a PRU corresponding to a second valid PO and a preamble associated with a second valid RO are calculated independently;

[0578] The first valid PO and the first valid RO are in the third SSB and RO association pattern period, and the second valid PO and the second valid RO are in the fourth SSB and RO association pattern period.

[0579] Optionally, a mapping ratio between a PRU corresponding to a first valid PO and a preamble associated with a first valid RO, and a mapping ratio between a PRU corresponding to a second valid PO and a preamble associated with a second valid RO are calculated jointly;

[0580] The first valid PO, the second valid PO, the first valid RO and the second valid RO are all in the same SSB and RO association pattern period.

[0581] Optionally, the second valid PO is within the PUSCH time slot and is within a non-SBFD uplink symbol or a non-SBFD flexible symbol; or,

[0582] The second valid RO starts no earlier than a second preset number of symbols after the last non-SBFD downlink symbol, and / or starts no earlier than a second preset number of symbols after the SSB symbol; or

[0583] The second valid RO is within the PUSCH time slot and is within the uplink symbol or the flexible symbol, and starts no earlier than the second preset number of symbols after the last downlink symbol, and / or starts no earlier than the second preset number of symbols after the SSB symbol.

[0584] Optionally, the first valid RO is in the uplink subband of the SBFD symbol; and / or,

[0585] The first valid RO starts no earlier than a third preset number of symbols after the non-SBFD downlink symbol is switched to the SBFD symbol.

[0586] Optionally, the second valid RO is within the PRACH time slot and is within a non-SBFD uplink symbol or a non-SBFD flexible symbol; or,

[0587] The second valid RO starts no earlier than the fourth preset number of symbols after the last non-SBFD downlink symbol, and / or starts no earlier than the fourth preset number of symbols after the SSB symbol; or

[0588] The second valid RO is within the PRACH time slot and is within the uplink symbol or the flexible symbol, and starts no earlier than the fourth preset number of symbols after the last downlink symbol and / or starts no earlier than the fourth preset number of symbols after the SSB symbol.

[0589] 5. Example Description of an Uplink Data Communication Device

[0590]

describe

[0591] The above mainly introduces the scheme of the embodiment of the present application from the perspective of the method side. It is understandable that, in order to implement the above functions, the terminal device includes a hardware structure and / or software module corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0592] The embodiments of the present application can divide the terminal device into functional units according to the above method examples. For example, each functional unit can be divided according to each function, or two or more functions can be integrated into one processing unit. The above integrated unit can be implemented in the form of hardware or in the form of a software program module. It should be noted that the division of units in the embodiments of the present application is schematic and is only a logical functional division. In actual implementation, other division methods can be used.

[0593] In the case of using integrated units, FIG16 is a block diagram of the functional units of an uplink data communication device according to an embodiment of the present application, wherein the uplink data communication device 1600 includes a transmission unit 1601 .

[0594] In some possible implementations, the transmission unit 1601 may be a module unit for processing signals, data, information, etc., and there is no specific limitation on this.

[0595] In some possible implementations, the uplink data communication apparatus 1600 may further include a storage unit for storing computer program codes or instructions executed by the uplink data communication apparatus 1600. The storage unit may be a memory.

[0596] In some possible implementations, the uplink data communication device 1600 may be a chip or a chip module.

[0597] In some possible implementations, the transmission unit 1601 may be integrated into other units.

[0598] For example, the transmission unit 1601 may be integrated into the communication unit.

[0599] For another example, the transmission unit 1601 may be integrated into the processing unit.

[0600] It should be noted that the communication unit may be a communication interface, a transceiver, a transceiver circuit, etc.

[0601] The processing unit may be a processor or a controller, for example, a baseband processor, a baseband chip, a central processing unit (CPU), 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 devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. The processing unit may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.

[0602] Optionally, the uplink data communication device 1600 is used to execute any step executed by the terminal device / chip / chip module, etc. in the above method embodiment.

[0603] In specific implementation, the transmission unit 1601 is used to execute any step in the above method embodiment, and when performing an action such as sending, it can selectively call other units to complete the corresponding operation. Detailed description is given below.

[0604] The transmission unit 1601 is configured to perform uplink data transmission of 2-step random access according to the first valid PO obtained by SBFD configuration.

[0605] It can be seen that since the uplink data communication of 2-step random access requires the use of PO, and the traditional PO is usually obtained by non-SBFD configuration, the present application can configure SBFD through the network and obtain the PO obtained by the SBFD configuration, and then perform uplink data communication based on the obtained valid PO, thereby combining SBFD with uplink data communication to achieve enhanced 2-step random access uplink data communication.

[0606] It should be noted that the specific implementation of each operation in the embodiment described in Figure 16 can be found in the description of the method embodiment shown above, and will not be detailed here.

[0607] Some possible implementations

[0608] Some possible implementations are described below, wherein some specific descriptions can be found above and will not be repeated here.

[0609] Optionally, the first valid PO is in the uplink subband of the SBFD symbol.

[0610] Optionally, the first valid PO is in an uplink subband of the SBFD symbol, including:

[0611] All frequency domain resource units of the first valid PO are within the uplink subband of the SBFD symbol.

[0612] Optionally, the first valid PO is in an uplink subband of the SBFD symbol, including:

[0613] Some frequency domain resource units of the first valid PO are in the uplink subband of the SBFD flexible symbol, and the remaining frequency domain resource units are in the downlink subband of the SBFD flexible symbol.

[0614] Optionally, the first valid PO starts no earlier than the first preset number of symbols after the non-SBFD downlink symbol is switched to the SBFD symbol.

[0615] Optionally, all symbols of the first valid PO are SBFD symbols.

[0616] Optionally, some symbols of the first valid PO are SBFD symbols, and the remaining symbols are non-SBFD uplink symbols or non-SBFD flexible symbols.

[0617] Optionally, the first valid PO and the second valid PO are configured using the same 2-step random access channel configuration information; or,

[0618] The first valid PO and the second valid PO are each configured using different 2-step random access channel configuration information.

[0619] Optionally, the first valid PO and the second valid PO are jointly and uniformly mapped to the demodulation reference signal DMRS resources; or,

[0620] The first valid PO and the second valid PO independently perform mapping between PO and DMRS resources.

[0621] Optionally, a mapping ratio between a physical uplink shared channel resource unit PRU corresponding to the first valid PO and a preamble associated with the first valid RO is the same as a mapping ratio between a PRU corresponding to the second valid PO and a preamble associated with the second valid RO; or

[0622] A mapping ratio between the PRU corresponding to the first valid PO and the preamble associated with the first valid RO is different from a mapping ratio between the PRU corresponding to the second valid PO and the preamble associated with the second valid RO;

[0623] The first valid PO and the first valid RO are in the first synchronization signal block SSB and RO associated pattern period, and the second valid PO and the second valid RO are in the second SSB and RO associated pattern period.

[0624] Optionally, a mapping ratio between a PRU corresponding to a first valid PO and a preamble associated with a first valid RO, and a mapping ratio between a PRU corresponding to a second valid PO and a preamble associated with a second valid RO are calculated independently;

[0625] The first valid PO and the first valid RO are in the third SSB and RO association pattern period, and the second valid PO and the second valid RO are in the fourth SSB and RO association pattern period.

[0626] Optionally, a mapping ratio between a PRU corresponding to a first valid PO and a preamble associated with a first valid RO, and a mapping ratio between a PRU corresponding to a second valid PO and a preamble associated with a second valid RO are calculated jointly;

[0627] The first valid PO, the second valid PO, the first valid RO and the second valid RO are all in the same SSB and RO association pattern period.

[0628] Optionally, the second valid PO is within the PUSCH time slot and is within a non-SBFD uplink symbol or a non-SBFD flexible symbol; or,

[0629] The second valid RO starts no earlier than a second preset number of symbols after the last non-SBFD downlink symbol, and / or starts no earlier than a second preset number of symbols after the SSB symbol; or

[0630] The second valid RO is within the PUSCH time slot and is within the uplink symbol or the flexible symbol, and starts no earlier than the second preset number of symbols after the last downlink symbol, and / or starts no earlier than the second preset number of symbols after the SSB symbol.

[0631] Optionally, the first valid RO is in the uplink subband of the SBFD symbol; and / or,

[0632] The first valid RO starts no earlier than a third preset number of symbols after the non-SBFD downlink symbol is switched to the SBFD symbol.

[0633] Optionally, the second valid RO is within the PRACH time slot and is within a non-SBFD uplink symbol or a non-SBFD flexible symbol; or,

[0634] The second valid RO starts no earlier than the fourth preset number of symbols after the last non-SBFD downlink symbol, and / or starts no earlier than the fourth preset number of symbols after the SSB symbol; or

[0635] The second valid RO is within the PRACH time slot and is within the uplink symbol or the flexible symbol, and starts no earlier than the fourth preset number of symbols after the last downlink symbol and / or starts no earlier than the fourth preset number of symbols after the SSB symbol.

[0636] VI. Example of Yet Another Uplink Data Communication Device

[0637]

describe

[0638] The above mainly introduces the solution of the embodiment of the present application from the perspective of the method side. It is understandable that, in order to implement the above functions, the network device includes a hardware structure and / or software module corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0639] The embodiments of the present application can divide the network device into functional units according to the above-mentioned method examples. For example, each functional unit can be divided according to each function, or two or more functions can be integrated into a processing unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software program module. It should be noted that the division of units in the embodiments of the present application is schematic and is only a logical functional division. In actual implementation, other division methods can be used.

[0640] In the case of using integrated units, FIG17 is a block diagram of the functional units of an uplink data communication device according to an embodiment of the present application, wherein the uplink data communication device 1700 includes a receiving unit 1701 .

[0641] In some possible implementations, the receiving unit 1701 may be a module unit for processing signals, data, information, etc., and there is no specific limitation on this.

[0642] In some possible implementations, the uplink data communication apparatus 1700 may further include a storage unit for storing computer program codes or instructions executed by the uplink data communication apparatus 1700. The storage unit may be a memory.

[0643] In some possible implementations, the uplink data communication device 1700 may be a chip or a chip module.

[0644] In some possible implementations, the receiving unit 1701 may be integrated into other units.

[0645] For example, the receiving unit 1701 may be integrated into the communication unit.

[0646] For another example, the receiving unit 1701 may be integrated into the processing unit.

[0647] It should be noted that the communication unit may be a communication interface, a transceiver, a transceiver circuit, etc.

[0648] The processing unit may be a processor or a controller, for example, a baseband processor, a baseband chip, a central processing unit (CPU), 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 devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. The processing unit may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.

[0649] Optionally, the uplink data communication device 1700 is configured to execute any step executed by a chip / chip module / network device, etc. in the above method embodiment.

[0650] In specific implementation, the receiving unit 1701 is used to execute any step in the above method embodiment, and when executing an action such as sending, it can selectively call other units to complete the corresponding operation.

[0651] The receiving unit 1701 is configured to receive uplink data of a 2-step random access according to a first valid PO obtained by SBFD configuration.

[0652] It can be seen that since the uplink data communication of 2-step random access requires the use of PO, and the traditional PO is usually obtained by non-SBFD configuration, the present application can configure SBFD through the network and obtain the PO obtained by the SBFD configuration, and then perform uplink data communication based on the obtained valid PO, thereby combining SBFD with uplink data communication to achieve enhanced 2-step random access uplink data communication.

[0653] It should be noted that the specific implementation of each operation in the embodiment described in Figure 17 can be found in the description of the method embodiment shown above, and will not be detailed here.

[0654] Some possible implementations

[0655] Some possible implementations are described below, wherein some specific descriptions can be found above and will not be repeated here.

[0656] Optionally, the first valid PO is in the uplink subband of the SBFD symbol.

[0657] Optionally, the first valid PO is in an uplink subband of the SBFD symbol, including:

[0658] All frequency domain resource units of the first valid PO are within the uplink subband of the SBFD symbol.

[0659] Optionally, the first valid PO is in an uplink subband of the SBFD symbol, including:

[0660] Some frequency domain resource units of the first valid PO are in the uplink subband of the SBFD flexible symbol, and the remaining frequency domain resource units are in the downlink subband of the SBFD flexible symbol.

[0661] Optionally, the first valid PO starts no earlier than the first preset number of symbols after the non-SBFD downlink symbol is switched to the SBFD symbol.

[0662] Optionally, all symbols of the first valid PO are SBFD symbols.

[0663] Optionally, some symbols of the first valid PO are SBFD symbols, and the remaining symbols are non-SBFD uplink symbols or non-SBFD flexible symbols.

[0664] Optionally, the first valid PO and the second valid PO are configured using the same 2-step random access channel configuration information; or,

[0665] The first valid PO and the second valid PO are each configured using different 2-step random access channel configuration information.

[0666] Optionally, the first valid PO and the second valid PO are jointly and uniformly mapped to the demodulation reference signal DMRS resources; or,

[0667] The first valid PO and the second valid PO independently perform mapping between PO and DMRS resources.

[0668] Optionally, a mapping ratio between a physical uplink shared channel resource unit PRU corresponding to the first valid PO and a preamble associated with the first valid RO is the same as a mapping ratio between a PRU corresponding to the second valid PO and a preamble associated with the second valid RO; or

[0669] A mapping ratio between the PRU corresponding to the first valid PO and the preamble associated with the first valid RO is different from a mapping ratio between the PRU corresponding to the second valid PO and the preamble associated with the second valid RO;

[0670] The first valid PO and the first valid RO are in the first synchronization signal block SSB and RO associated pattern period, and the second valid PO and the second valid RO are in the second SSB and RO associated pattern period.

[0671] Optionally, a mapping ratio between a PRU corresponding to a first valid PO and a preamble associated with a first valid RO, and a mapping ratio between a PRU corresponding to a second valid PO and a preamble associated with a second valid RO are calculated independently;

[0672] The first valid PO and the first valid RO are in the third SSB and RO association pattern period, and the second valid PO and the second valid RO are in the fourth SSB and RO association pattern period.

[0673] Optionally, a mapping ratio between a PRU corresponding to a first valid PO and a preamble associated with a first valid RO, and a mapping ratio between a PRU corresponding to a second valid PO and a preamble associated with a second valid RO are calculated jointly;

[0674] The first valid PO, the second valid PO, the first valid RO and the second valid RO are all in the same SSB and RO association pattern period.

[0675] Optionally, the second valid PO is within the PUSCH time slot and is within a non-SBFD uplink symbol or a non-SBFD flexible symbol; or,

[0676] The second valid RO starts no earlier than a second preset number of symbols after the last non-SBFD downlink symbol, and / or starts no earlier than a second preset number of symbols after the SSB symbol; or

[0677] The second valid RO is within the PUSCH time slot and is within the uplink symbol or the flexible symbol, and starts no earlier than the second preset number of symbols after the last downlink symbol, and / or starts no earlier than the second preset number of symbols after the SSB symbol.

[0678] Optionally, the first valid RO is in the uplink subband of the SBFD symbol; and / or,

[0679] The first valid RO starts no earlier than a third preset number of symbols after the non-SBFD downlink symbol is switched to the SBFD symbol.

[0680] Optionally, the second valid RO is within the PRACH time slot and is within a non-SBFD uplink symbol or a non-SBFD flexible symbol; or,

[0681] The second valid RO starts no earlier than the fourth preset number of symbols after the last non-SBFD downlink symbol, and / or starts no earlier than the fourth preset number of symbols after the SSB symbol; or

[0682] The second valid RO is within the PRACH time slot and is within the uplink symbol or the flexible symbol, and starts no earlier than the fourth preset number of symbols after the last downlink symbol and / or starts no earlier than the fourth preset number of symbols after the SSB symbol.

[0683] VII. Example of a terminal device

[0684] Please refer to Figure 18, which is a schematic diagram of the structure of a terminal device according to an embodiment of the present application. The terminal device 1800 may include a processor 1810, a memory 1820, and a communication bus for connecting the processor 1810 and the memory 1820.

[0685] In some possible implementations, the memory 1820 includes but is not limited to random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM) or portable read-only memory (CD-ROM), and the memory 1820 is used to store the program code executed by the terminal device 1800 and the data transmitted.

[0686] In some possible implementations, the terminal device 1800 further includes a communication interface for receiving and sending data.

[0687] In some possible implementations, the terminal device 1800 may be the first terminal device mentioned above.

[0688] In some possible implementations, the processor 1810 may be one or more CPUs. In the case where the processor 1810 is a CPU, the CPU may be a single-core CPU or a multi-core CPU.

[0689] In some possible implementations, the processor 1810 may be a baseband chip, a chip, a CPU, a general-purpose processor, a DSP, an ASIC, an FPGA, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof.

[0690] In a specific implementation, the processor 1810 in the terminal device 1800 is configured to execute the computer program or instruction 1821 stored in the memory 1820 to perform the following operations:

[0691] The first valid PO obtained according to the SBFD configuration is used to perform uplink data transmission using two-step random access.

[0692] It can be seen that since the uplink data communication of 2-step random access requires the use of PO, and the traditional PO is usually obtained by non-SBFD configuration, the present application can configure SBFD through the network and obtain the PO obtained by the SBFD configuration, and then perform uplink data communication based on the obtained valid PO, thereby combining SBFD with uplink data communication to achieve enhanced 2-step random access uplink data communication.

[0693] It should be noted that the specific implementation of each operation can adopt the corresponding description of the method embodiment shown above, and the terminal device 1800 can be used to execute the above method embodiment of this application, which will not be repeated here.

[0694] VII. Example of a Network Device

[0695] Please refer to Figure 19, which is a schematic diagram of the structure of a network device provided in an embodiment of the present application. In particular, the network device 1900 includes a processor 1910, a memory 1920, and a communication bus for connecting the processor 1910 and the memory 1920.

[0696] In some possible implementations, the memory 1920 includes but is not limited to RAM, ROM, EPROM or CD-ROM, and is used to store relevant instructions and data.

[0697] In some possible implementations, the network device 1900 further includes a communication interface for receiving and sending data.

[0698] In some possible implementations, the processor 1910 may be one or more CPUs. In the case where the processor 1910 is a CPU, the CPU may be a single-core CPU or a multi-core CPU.

[0699] In some possible implementations, the processor 1910 may be a baseband chip, a chip, a CPU, a general-purpose processor, a DSP, an ASIC, an FPGA, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof.

[0700] In some possible implementations, the processor 1910 in the network device 1900 is configured to execute a computer program or instruction 1921 stored in the memory 1920 to perform the following operations:

[0701] The uplink data reception of the 2-step random access is performed according to the first valid PO obtained by the SBFD configuration.

[0702] It can be seen that since the uplink data communication of 2-step random access requires the use of PO, and the traditional PO is usually obtained by non-SBFD configuration, the present application can configure SBFD through the network and obtain the PO obtained by the SBFD configuration, and then perform uplink data communication based on the obtained valid PO, thereby combining SBFD with uplink data communication to achieve enhanced 2-step random access uplink data communication.

[0703] It should be noted that the specific implementation of each operation can adopt the corresponding description of the method embodiment shown above, and the network device 1900 can be used to execute the above method embodiment of this application, which will not be repeated here.

[0704] 8. Other related examples

[0705] In some possible implementations, the above method embodiments may be applied to or within a terminal device. That is, the execution subject of the above method embodiments may be a terminal device, a chip, a chip module, or a module, etc., without specific limitation.

[0706] In some possible implementations, the above method embodiments may be applied to or within a network device. That is, the execution subject of the above method embodiments may be a network device, a chip, a chip module, or a module, etc., without specific limitation.

[0707] An embodiment of the present application also provides a chip, including a processor, a memory, and a computer program or instructions stored in the memory, wherein the processor executes the computer program or instructions to implement the steps described in the above method embodiment.

[0708] An embodiment of the present application also provides a chip module, including a transceiver component and a chip, wherein the chip includes a processor, a memory, and a computer program or instructions stored on the memory, wherein the processor executes the computer program or instructions to implement the steps described in the above method embodiment.

[0709] An embodiment of the present application further provides a computer-readable storage medium storing a computer program or instructions, which implements the steps described in the above method embodiment when executed.

[0710] An embodiment of the present application further provides a computer program product, including a computer program or instructions, which implement the steps described in the above method embodiment when executed.

[0711] An embodiment of the present application also provides a communication system, including the above-mentioned terminal device and the above-mentioned network device.

[0712] It should be noted that, for the above-mentioned various embodiments, for the sake of simplicity of description, they are all expressed as a series of action combinations. Those skilled in the art should know that this application is not limited by the order of the actions described, because some steps in the embodiments of the present application can be performed in other orders or simultaneously. In addition, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions, steps, modules or units involved are not necessarily required by the embodiments of the present application.

[0713] In the above embodiments, the embodiments of the present application each focus on the description of each embodiment. For parts not described in detail in a particular embodiment, please refer to the relevant description of other embodiments. The steps of the method or algorithm described in the embodiments of the present application can be implemented in hardware or by a processor executing software instructions. The software instructions can be composed of corresponding software modules, which can be stored in RAM, flash memory, ROM, EPROM, electrically erasable programmable read-only memory (EEPROM), registers, hard disk, removable hard disk, read-only compact disk (CD-ROM) or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and storage medium can be located in an ASIC. In addition, the ASIC can be located in a terminal device or a management device. Of course, the processor and storage medium can also exist as discrete components in the terminal device or the management device.

[0714] Those skilled in the art will appreciate that in one or more of the above examples, the functions described in the embodiments of the present application can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, they can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital video disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0715] The modules / units included in the devices and products described in the above embodiments may be software modules / units, hardware modules / units, or partly software modules / units and partly hardware modules / units. For example, for the devices and products applied to or integrated in the chip, the modules / units included therein may all be implemented in the form of hardware such as circuits, or at least part of the modules / units may be implemented in the form of software programs, which run on the processor integrated inside the chip, and the remaining (if any) modules / units may be implemented in the form of hardware such as circuits; for the devices and products applied to or integrated in the chip module, the modules / units included therein may all be implemented in the form of hardware such as circuits, and different modules / units may be located in the same component (such as chip, circuit module, etc.) or different components of the chip module, or at least part of the modules / units may be It is implemented in the form of a software program, which runs on the processor integrated inside the chip module, and the remaining (if any) modules / units can be implemented in hardware such as circuits; for each device or product applied to or integrated in the terminal device, the modules / units contained therein can all be implemented in hardware such as circuits, and different modules / units can be located in the same component (for example, chip, circuit module, etc.) or different components in the terminal device, or at least some modules / units can be implemented in the form of a software program, which runs on the processor integrated inside the terminal device, and the remaining (if any) modules / units can be implemented in hardware such as circuits. The specific implementation methods described above further explain the purpose, technical solutions and beneficial effects of the embodiments of the present application in detail. It should be understood that the above description is only the specific implementation method of the embodiments of the present application and is not intended to limit the scope of protection of the embodiments of the present application. Any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application should be included in the scope of protection of the embodiments of the present application.

Claims

1. An uplink data communication method, characterized in that: include: The uplink data transmission of 2-step random access is performed according to the first valid physical uplink shared channel opportunity PO obtained by the sub-band full-duplex SBFD configuration.

2. The method according to claim 1, characterized in that The first valid PO is in the uplink subband of the SBFD symbol.

3. The method according to claim 2, characterized in that The first valid PO is in an uplink subband of the SBFD symbol, including: All frequency domain resource units of the first effective PO are within the uplink subband of the SBFD symbol.

4. The method according to claim 2, characterized in that: The first valid PO is in an uplink subband of the SBFD symbol, including: Some frequency domain resource units of the first valid PO are in the uplink subband of the SBFD flexible symbol, and the remaining frequency domain resource units are in the downlink subband of the SBFD flexible symbol.

5. The method according to any one of claims 1 to 4, characterized in that: The first valid PO starts no earlier than a first preset number of symbols after the non-SBFD downlink symbol is switched to the SBFD symbol.

6. The method according to any one of claims 1 to 5, characterized in that: All symbols of the first valid PO are SBFD symbols.

7. The method according to any one of claims 1 to 5, characterized in that: Some symbols of the first valid PO are SBFD symbols, and the remaining symbols are non-SBFD uplink symbols or non-SBFD flexible symbols.

8. The method according to claim 1, characterized in that The first valid PO and the second valid PO are configured using the same 2-step random access channel configuration information; or, The first valid PO and the second valid PO are each configured using different 2-step random access channel configuration information.

9. The method according to claim 1, characterized in that: The first valid PO and the second valid PO are jointly and uniformly mapped between PO and demodulation reference signal DMRS resources; or, The first valid PO and the second valid PO each independently perform mapping between PO and DMRS resources.

10. The method according to claim 1, characterized in that The mapping ratio between the physical uplink shared channel resource unit PRU corresponding to the first valid PO and the preamble associated with the first valid physical random access channel opportunity RO is the same as the mapping ratio between the PRU corresponding to the second valid PO and the preamble associated with the second valid RO; or A mapping ratio between the PRU corresponding to the first valid PO and the preamble associated with the first valid RO is different from a mapping ratio between the PRU corresponding to the second valid PO and the preamble associated with the second valid RO; The first valid PO and the first valid RO are in a first synchronization signal block SSB and RO associated pattern period, and the second valid PO and the second valid RO are in a second SSB and RO associated pattern period.

11. The method according to claim 1, characterized in that: The mapping ratio between the PRU corresponding to the first valid PO and the preamble associated with the first valid RO, and the mapping ratio between the PRU corresponding to the second valid PO and the preamble associated with the second valid RO are calculated independently; The first valid PO and the first valid RO are in a third SSB and RO association pattern period, and the second valid PO and the second valid RO are in a fourth SSB and RO association pattern period.

12. The method according to claim 1, characterized in that A mapping ratio between the PRU corresponding to the first valid PO and the preamble associated with the first valid RO, and a mapping ratio between the PRU corresponding to the second valid PO and the preamble associated with the second valid RO are jointly calculated; The first valid PO, the second valid PO, the first valid RO and the second valid RO are all in the same SSB and RO association pattern period.

13. The method according to any one of claims 10 to 12, characterized in that: The second valid PO is within the PUSCH time slot and is within a non-SBFD uplink symbol or a non-SBFD flexible symbol; or, The second valid RO starts no earlier than a second preset number of symbols after the last non-SBFD downlink symbol, and / or starts no earlier than a second preset number of symbols after the SSB symbol; or, The second valid RO is within the PUSCH time slot and is within the uplink symbol or the flexible symbol, and starts no earlier than the second preset number of symbols after the last downlink symbol, and / or starts no earlier than the second preset number of symbols after the SSB symbol.

14. The method according to any one of claims 10 to 12, characterized in that: The first valid RO is in the uplink subband of the SBFD symbol; and / or, The first valid RO starts no earlier than a third preset number of symbols after the non-SBFD downlink symbol is switched to the SBFD symbol.

15. The method according to any one of claims 10 to 12, characterized in that: The second valid RO is in the PRACH time slot and is in a non-SBFD uplink symbol or a non-SBFD flexible symbol; or, The second valid RO starts no earlier than the fourth preset number of symbols after the last non-SBFD downlink symbol, and / or starts no earlier than the fourth preset number of symbols after the SSB symbol; or, The second valid RO is within the PRACH time slot and is within an uplink symbol or a flexible symbol, and starts no earlier than the fourth preset number of symbols after the last downlink symbol, and / or starts no earlier than the fourth preset number of symbols after the SSB symbol.

16. An uplink data communication method, characterized in that: include: The uplink data reception of 2-step random access is performed according to the first valid physical uplink shared channel opportunity PO obtained by the sub-band full-duplex SBFD configuration.

17. The method according to claim 16, characterized in that The first valid PO is in the uplink subband of the SBFD symbol.

18. The method according to claim 17, characterized in that The first valid PO is in an uplink subband of the SBFD symbol, including: All frequency domain resource units of the first effective PO are within the uplink subband of the SBFD symbol.

19. The method according to claim 17, characterized in that The first valid PO is in an uplink subband of the SBFD symbol, including: Some frequency domain resource units of the first valid PO are in the uplink subband of the SBFD flexible symbol, and the remaining frequency domain resource units are in the downlink subband of the SBFD flexible symbol.

20. The method according to any one of claims 16 to 19, characterized in that: The first valid PO starts no earlier than a first preset number of symbols after the non-SBFD downlink symbol is switched to the SBFD symbol.

21. The method according to any one of claims 16 to 20, characterized in that: All symbols of the first valid PO are SBFD symbols.

22. The method according to any one of claims 16 to 20, characterized in that: Some symbols of the first valid PO are SBFD symbols, and the remaining symbols are non-SBFD uplink symbols or non-SBFD flexible symbols.

23. The method according to claim 16, characterized in that The first valid PO and the second valid PO are configured using the same 2-step random access channel configuration information; or, The first valid PO and the second valid PO are each configured using different 2-step random access channel configuration information.

24. The method according to claim 16, characterized in that The first valid PO and the second valid PO are jointly and uniformly mapped between PO and demodulation reference signal DMRS resources; or, The first valid PO and the second valid PO each independently perform mapping between PO and DMRS resources.

25. The method according to claim 16, characterized in that The mapping ratio between the physical uplink shared channel resource unit PRU corresponding to the first valid PO and the preamble associated with the first valid physical random access channel opportunity RO is the same as the mapping ratio between the PRU corresponding to the second valid PO and the preamble associated with the second valid RO; or A mapping ratio between the PRU corresponding to the first valid PO and the preamble associated with the first valid RO is different from a mapping ratio between the PRU corresponding to the second valid PO and the preamble associated with the second valid RO; The first valid PO and the first valid RO are in a first synchronization signal block SSB and RO associated pattern period, and the second valid PO and the second valid RO are in a second SSB and RO associated pattern period.

26. The method according to claim 16, characterized in that The mapping ratio between the PRU corresponding to the first valid PO and the preamble associated with the first valid RO, and the mapping ratio between the PRU corresponding to the second valid PO and the preamble associated with the second valid RO are calculated independently; The first valid PO and the first valid RO are in a third SSB and RO association pattern period, and the second valid PO and the second valid RO are in a fourth SSB and RO association pattern period.

27. The method according to claim 16, characterized in that A mapping ratio between the PRU corresponding to the first valid PO and the preamble associated with the first valid RO, and a mapping ratio between the PRU corresponding to the second valid PO and the preamble associated with the second valid RO are calculated jointly; The first valid PO, the second valid PO, the first valid RO and the second valid RO are all in the same SSB and RO association pattern period.

28. The method according to any one of claims 25 to 27, characterized in that: The second valid PO is within the PUSCH time slot and is within a non-SBFD uplink symbol or a non-SBFD flexible symbol; or, The second valid RO starts no earlier than a second preset number of symbols after the last non-SBFD downlink symbol, and / or starts no earlier than a second preset number of symbols after the SSB symbol; or, The second valid RO is within the PUSCH time slot and is within the uplink symbol or the flexible symbol, and starts no earlier than the second preset number of symbols after the last downlink symbol, and / or starts no earlier than the second preset number of symbols after the SSB symbol.

29. The method according to any one of claims 25 to 27, characterized in that: The first valid RO is in the uplink subband of the SBFD symbol; and / or, The first valid RO starts no earlier than a third preset number of symbols after the non-SBFD downlink symbol is switched to the SBFD symbol.

30. The method according to any one of claims 25 to 27, characterized in that: The second valid RO is in the PRACH time slot and is in a non-SBFD uplink symbol or a non-SBFD flexible symbol; or, The second valid RO starts no earlier than the fourth preset number of symbols after the last non-SBFD downlink symbol, and / or starts no earlier than the fourth preset number of symbols after the SSB symbol; or, The second valid RO is within the PRACH time slot and is within an uplink symbol or a flexible symbol, and starts no earlier than the fourth preset number of symbols after the last downlink symbol, and / or starts no earlier than the fourth preset number of symbols after the SSB symbol.

31. An uplink data communication device, characterized in that: include: The transmission unit is used to perform uplink data transmission of 2-step random access according to the first effective physical uplink shared channel opportunity PO obtained by the sub-band full-duplex SBFD configuration.

32. The device according to claim 31, characterized in that The first valid PO is in the uplink subband of the SBFD symbol.

33. The device according to claim 32, characterized in that The first valid PO is in an uplink subband of the SBFD symbol, including: All frequency domain resource units of the first effective PO are within the uplink subband of the SBFD symbol.

34. The device according to claim 32, characterized in that The first valid PO is in an uplink subband of the SBFD symbol, including: Some frequency domain resource units of the first valid PO are in the uplink subband of the SBFD flexible symbol, and the remaining frequency domain resource units are in the downlink subband of the SBFD flexible symbol.

35. The device according to any one of claims 31 to 34, characterized in that The first valid PO starts no earlier than a first preset number of symbols after the non-SBFD downlink symbol is switched to the SBFD symbol.

36. The device according to any one of claims 31 to 35, characterized in that All symbols of the first valid PO are SBFD symbols.

37. The device according to any one of claims 31 to 35, characterized in that Some symbols of the first valid PO are SBFD symbols, and the remaining symbols are non-SBFD uplink symbols or non-SBFD flexible symbols.

38. The device according to claim 31, characterized in that The first valid PO and the second valid PO are configured using the same 2-step random access channel configuration information; or, The first valid PO and the second valid PO are each configured using different 2-step random access channel configuration information.

39. The device according to claim 31, characterized in that The first valid PO and the second valid PO are jointly and uniformly mapped between PO and demodulation reference signal DMRS resources; or, The first valid PO and the second valid PO each independently perform mapping between PO and DMRS resources.

40. The device according to claim 31, characterized in that The mapping ratio between the physical uplink shared channel resource unit PRU corresponding to the first valid PO and the preamble associated with the first valid physical random access channel opportunity RO is the same as the mapping ratio between the PRU corresponding to the second valid PO and the preamble associated with the second valid RO; or A mapping ratio between the PRU corresponding to the first valid PO and the preamble associated with the first valid RO is different from a mapping ratio between the PRU corresponding to the second valid PO and the preamble associated with the second valid RO; The first valid PO and the first valid RO are in a first synchronization signal block SSB and RO associated pattern period, and the second valid PO and the second valid RO are in a second SSB and RO associated pattern period.

41. The device according to claim 31, characterized in that The mapping ratio between the PRU corresponding to the first valid PO and the preamble associated with the first valid RO, and the mapping ratio between the PRU corresponding to the second valid PO and the preamble associated with the second valid RO are calculated independently; The first valid PO and the first valid RO are in a third SSB and RO association pattern period, and the second valid PO and the second valid RO are in a fourth SSB and RO association pattern period.

42. The device according to claim 31, characterized in that A mapping ratio between the PRU corresponding to the first valid PO and the preamble associated with the first valid RO, and a mapping ratio between the PRU corresponding to the second valid PO and the preamble associated with the second valid RO are calculated jointly; The first valid PO, the second valid PO, the first valid RO and the second valid RO are all in the same SSB and RO association pattern period.

43. The device according to any one of claims 40 to 42, characterized in that The second valid PO is within the PUSCH time slot and is within a non-SBFD uplink symbol or a non-SBFD flexible symbol; or, The second valid RO starts no earlier than a second preset number of symbols after the last non-SBFD downlink symbol, and / or starts no earlier than a second preset number of symbols after the SSB symbol; or, The second valid RO is within the PUSCH time slot and is within the uplink symbol or the flexible symbol, and starts no earlier than the second preset number of symbols after the last downlink symbol, and / or starts no earlier than the second preset number of symbols after the SSB symbol.

44. The device according to any one of claims 40 to 42, characterized in that The first valid RO is in the uplink subband of the SBFD symbol; and / or, The first valid RO starts no earlier than a third preset number of symbols after the non-SBFD downlink symbol is switched to the SBFD symbol.

45. The device according to any one of claims 40 to 42, characterized in that The second valid RO is in the PRACH time slot and is in a non-SBFD uplink symbol or a non-SBFD flexible symbol; or, The second valid RO starts no earlier than the fourth preset number of symbols after the last non-SBFD downlink symbol, and / or starts no earlier than the fourth preset number of symbols after the SSB symbol; or, The second valid RO is within the PRACH time slot and is within an uplink symbol or a flexible symbol, and starts no earlier than the fourth preset number of symbols after the last downlink symbol, and / or starts no earlier than the fourth preset number of symbols after the SSB symbol.

46. ​​An uplink data communication device, characterized in that: include: The receiving unit is used to perform uplink data reception of 2-step random access according to the first valid physical uplink shared channel opportunity PO obtained by the sub-band full-duplex SBFD configuration.

47. The device according to claim 46, characterized in that The first valid PO is in the uplink subband of the SBFD symbol.

48. The device according to claim 47, characterized in that The first valid PO is in an uplink subband of the SBFD symbol, including: All frequency domain resource units of the first effective PO are within the uplink subband of the SBFD symbol.

49. The device according to claim 47, characterized in that The first valid PO is in an uplink subband of the SBFD symbol, including: Some frequency domain resource units of the first valid PO are in the uplink subband of the SBFD flexible symbol, and the remaining frequency domain resource units are in the downlink subband of the SBFD flexible symbol.

50. The device according to any one of claims 46 to 49, characterized in that The first valid PO starts no earlier than a first preset number of symbols after the non-SBFD downlink symbol is switched to the SBFD symbol.

51. The device according to any one of claims 46 to 50, characterized in that All symbols of the first valid PO are SBFD symbols.

52. The device according to any one of claims 46 to 50, characterized in that Some symbols of the first valid PO are SBFD symbols, and the remaining symbols are non-SBFD uplink symbols or non-SBFD flexible symbols.

53. The device according to claim 46, characterized in that The first valid PO and the second valid PO are configured using the same 2-step random access channel configuration information; or, The first valid PO and the second valid PO are each configured using different 2-step random access channel configuration information.

54. The device according to claim 46, characterized in that The first valid PO and the second valid PO are jointly and uniformly mapped between PO and demodulation reference signal DMRS resources; or, The first valid PO and the second valid PO each independently perform mapping between PO and DMRS resources.

55. The device according to claim 46, characterized in that The mapping ratio between the physical uplink shared channel resource unit PRU corresponding to the first valid PO and the preamble associated with the first valid physical random access channel opportunity RO is the same as the mapping ratio between the PRU corresponding to the second valid PO and the preamble associated with the second valid RO; or A mapping ratio between the PRU corresponding to the first valid PO and the preamble associated with the first valid RO is different from a mapping ratio between the PRU corresponding to the second valid PO and the preamble associated with the second valid RO; The first valid PO and the first valid RO are in a first synchronization signal block SSB and RO associated pattern period, and the second valid PO and the second valid RO are in a second SSB and RO associated pattern period.

56. The device according to claim 46, characterized in that The mapping ratio between the PRU corresponding to the first valid PO and the preamble associated with the first valid RO, and the mapping ratio between the PRU corresponding to the second valid PO and the preamble associated with the second valid RO are calculated independently; The first valid PO and the first valid RO are in a third SSB and RO association pattern period, and the second valid PO and the second valid RO are in a fourth SSB and RO association pattern period.

57. The device according to claim 46, characterized in that A mapping ratio between the PRU corresponding to the first valid PO and the preamble associated with the first valid RO, and a mapping ratio between the PRU corresponding to the second valid PO and the preamble associated with the second valid RO are calculated jointly; The first valid PO, the second valid PO, the first valid RO and the second valid RO are all in the same SSB and RO association pattern period.

58. The device according to any one of claims 55 to 57, characterized in that The second valid PO is within the PUSCH time slot and is within a non-SBFD uplink symbol or a non-SBFD flexible symbol; or, The second valid RO starts no earlier than a second preset number of symbols after the last non-SBFD downlink symbol, and / or starts no earlier than a second preset number of symbols after the SSB symbol; or, The second valid RO is within the PUSCH time slot and is within the uplink symbol or the flexible symbol, and starts no earlier than the second preset number of symbols after the last downlink symbol, and / or starts no earlier than the second preset number of symbols after the SSB symbol.

59. The device according to any one of claims 55 to 57, characterized in that The first valid RO is in the uplink subband of the SBFD symbol; and / or, The first valid RO starts no earlier than a third preset number of symbols after the non-SBFD downlink symbol is switched to the SBFD symbol.

60. The device according to any one of claims 55 to 57, characterized in that The second valid RO is in the PRACH time slot and is in a non-SBFD uplink symbol or a non-SBFD flexible symbol; or, The second valid RO starts no earlier than the fourth preset number of symbols after the last non-SBFD downlink symbol, and / or starts no earlier than the fourth preset number of symbols after the SSB symbol; or, The second valid RO is within the PRACH time slot and is within an uplink symbol or a flexible symbol, and starts no earlier than the fourth preset number of symbols after the last downlink symbol, and / or starts no earlier than the fourth preset number of symbols after the SSB symbol.

61. A terminal device, comprising a processor, a memory and a computer program or instruction stored in the memory, characterized in that: The processor executes the computer program or instructions to implement the steps of the method according to any one of claims 1 to 15.

62. A network device comprising a processor, a memory and a computer program or instruction stored in the memory, characterized in that: The processor executes the computer program or instructions to implement the steps of the method according to any one of claims 16 to 30.

63. A chip, comprising a processor and a communication interface, characterized in that: The processor performs the steps of the method of any one of claims 1-15 or 16-30.

64. A computer-readable storage medium, characterized in that It stores a computer program or instruction, which implements the steps of the method described in any one of claims 1-15 or 16-30 when executed.

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