System and method for indicating and determining channel structure information

Abstract

Systems and methods for indicating and determining channel structure information are disclosed herein. In one embodiment, a method performed by a first node is disclosed. The method includes receiving a wireless signal from a second node, obtaining channel structure information indicated by the wireless signal, determining a first set of waveform parameters configured for the wireless signal, and determining, based on the channel structure information, a transmission property of a transmission link between the first node and the second node for a predetermined duration with respect to the first set of waveform parameters.

Description

[0001] This application is a divisional application of Chinese patent application No. 201780093828.8, filed on August 10, 2017, entitled "System and method for indicating and determining channel structure information". Technical Field

[0002] This disclosure generally relates to wireless communications and, more specifically, to systems and methods for indicating and determining channel structure information in a wireless communication network. Background Technology

[0003] Over the past few decades, mobile communications have evolved from voice services to high-speed broadband data services. With the further development of new businesses and applications (such as the mobile internet and the Internet of Things (IoT)), the demand for data on mobile networks will continue to grow exponentially. Based on the diverse business and application needs in future mobile communications, wireless communication systems should meet various requirements, such as throughput, latency, reliability, link density, cost, energy consumption, complexity, and coverage.

[0004] LTE (Long Term Evolution) systems can support FDD (Frequency Division Duplex) operation on a pair of spectrums (e.g., downlink on one carrier and uplink on another). It also supports TDD (Time Division Duplex) operation on unpaired carriers. In conventional TDD operation, only a limited number of uplink and downlink subframe allocation configurations are used (corresponding to configurations 0 to 6). Adjacent areas use the same configuration, i.e., they have the same transmission direction. eIMTA (Enhanced Interference Mitigation and Service Adaptation) technology can semi-statically configure the uplink and downlink of the LTE system (within 10 ms or more) and allow adjacent areas to use different TDD uplink and downlink subframe allocation configurations. However, these configurations are still limited to the aforementioned configurations.

[0005] To meet the rapid adaptation needs of businesses and further improve spectrum utilization, future wireless communication systems (such as 5G / New Radio (NR) systems) will support dynamic TDD operation, flexible duplex (or duplex flexibility) operation, and full-duplex operation. Taking dynamic TDD as an example, dynamic TDD operation refers to dynamically or semi-statically changing the transmission direction to uplink or downlink on unpaired spectrum (or on uplink or downlink carriers in paired spectrum). Compared to eIMTA, dynamic TDD operation can support direction changes at the subframe level, slot level, or even more dynamic levels. While eIMTA systems use the Physical Downlink Control Channel (PDCCH) to indicate TDD subframe configuration, 5G / NR systems will use the Group Common PDCCH to notify terminal groups and / or user groups of control information, such as Slot Format Related Information (SFI). For example, in a 5G / NR system, a base station (BS) can indicate the SFI via the Group Common PDCCH to notify the terminal group of channel structure information regarding the transmission link between the BS and each terminal within one or more slots. Channel structure can include patterns of transmission attributes, such as downlink (DL), uplink (UL), and / or OTHER in the transmission link.

[0006] There is no satisfactory solution in existing literature or prior art for any of the following problems: (a) how the terminal understands the SFI indication under different waveform parameter sets; (b) how the terminal handles the OTHER field in the channel structure, especially when the transmission direction indicated by the SFI conflicts with the transmission direction indicated by the user equipment (UE)-specific downlink control information (DCI), and / or conflicts with the transmission direction under a semi-static configuration. Summary of the Invention

[0007] The exemplary embodiments disclosed herein relate to solving problems associated with one or more problems presented in the prior art, and provide additional features that will become apparent when taken in conjunction with the accompanying drawings and the following detailed description. Exemplary systems, methods, apparatuses, and computer program products are disclosed herein according to various embodiments. However, it should be understood that these embodiments are presented by way of example and not limitation, and that various modifications can be made to the disclosed embodiments without departing from the scope of this disclosure, as will be apparent to those skilled in the art upon reading this disclosure.

[0008] In one embodiment, a method performed by a first node is disclosed. The method includes: receiving a wireless signal from a second node; obtaining channel structure information indicated by the wireless signal; determining a first set of waveform parameters configured for the wireless signal; and, based on the channel structure information, determining transmission properties of a transmission link between the first node and the second node over a predetermined duration with respect to the first set of waveform parameters.

[0009] In another embodiment, a method performed by a first node is disclosed. The method includes: configuring a first waveform parameter set and a predetermined duration for a second node to determine transmission attributes of a transmission link between the first and second nodes; generating a wireless signal indicating channel structure information; and transmitting the wireless signal to the second node, wherein the second node determines the transmission attributes of the transmission link within the predetermined duration based on the channel structure information with respect to the first waveform parameter set.

[0010] In another embodiment, a communication node configured to implement the methods disclosed in some embodiments is disclosed.

[0011] In yet another embodiment, a non-transitory computer-readable medium having stored thereon computer-executable instructions for implementing the methods disclosed in some embodiments is disclosed. Attached Figure Description

[0012] Exemplary embodiments of this disclosure are described in detail below with reference to the figures below. The figures are provided for illustrative purposes only and depict only exemplary embodiments of this disclosure to aid the reader's understanding. Therefore, the figures should not be considered as limiting the breadth, scope, or applicability of this disclosure. It should be noted that these figures are not necessarily drawn to scale for clarity and ease of illustration.

[0013] Figure 1 A block diagram of a base station (BS) is shown according to some embodiments of this disclosure.

[0014] Figure 2 A flowchart of a method performed by a BS to indicate channel structure information is shown according to some embodiments of this disclosure.

[0015] Figure 3 Block diagrams of user equipment (UE) are shown according to some embodiments of this disclosure.

[0016] Figure 4 A flowchart illustrating a method performed by a UE to determine and update channel structure information is shown according to some embodiments of this disclosure.

[0017] Figures 5-7 Examples of channel structure determination under different waveform parameter sets are shown according to some embodiments of this disclosure when a predetermined number of OFDM symbols are covered in SFI mode.

[0018] Figures 8-13 Examples of channel structure determination for transmission attribute alignment under different waveform parameter sets are shown according to some embodiments of this disclosure when the SFI mode covers a predetermined time length.

[0019] Figures 14-16 Examples of channel structures with misaligned transmission properties under different waveform parameter sets are shown according to some embodiments of this disclosure when an SFI mode covers a predetermined number of time slots or OFDM symbols.

[0020] Figure 17 According to some embodiments of this disclosure, a process is illustrated for a UE to update the transmission attributes of the OTHER field to receive and / or send periodic or aperiodic downlink and / or uplink signals that are semi-statically configured in the OTHER field. Detailed Implementation

[0021] The following description of various exemplary embodiments of this disclosure, with reference to the accompanying drawings, is intended to enable those skilled in the art to make and use this disclosure. It will be apparent to those skilled in the art that various changes or modifications to the examples described herein can be made without departing from the scope of this disclosure after reading it. Therefore, this disclosure is not limited to the exemplary embodiments and applications described and illustrated herein. Furthermore, the specific order and hierarchy of steps in the methods disclosed herein are merely exemplary methods. Based on design preferences, the order or hierarchy of steps in the disclosed methods or processes can be rearranged without departing from the scope of this disclosure. Therefore, those skilled in the art will understand that the methods and techniques disclosed herein present various steps or actions in the same order, and unless otherwise stated herein, this disclosure is not limited to the specific order or hierarchy presented.

[0022] In 5G / NR systems, the BS (Base Station) uses a group common PDCCH to notify the User Equipment (UE) terminal group of certain control information (e.g., Slot Format Related Information (SFI)) to indicate the channel structure information of the transmission link between the BS and each UE for a valid duration. The channel structure may include patterns of transmission attributes, such as the DL, UL, and / or OTHER of the transmission link. There are no satisfactory solutions in existing literature or prior art for either of the following problems: first, how the UE interprets the SFI indication under different waveform parameter sets; and second, how the UE handles the OTHER field in the channel structure, especially when the transmission direction indicated by the SFI conflicts with the transmission direction indicated by the UE-specific DCI, and / or when it conflicts with the transmission direction under a semi-static configuration.

[0023] Regarding the first question, since the specific Bandwidth Part (BWP) configuration to be supported in 5G / NR has not yet been finalized, this invention will describe both the case of activating a single BWP and the case of activating multiple BWPs. Waveform parameter sets (e.g., parameter sets) are closely related to the BWP. For example, a parameter set configured by the system for a DL BWP can be applied to the PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), and the corresponding DMRS (Demodulation Reference Signal) within the DL BWP; and a parameter set configured by the system for a UL BWP can be applied to the PUCCH (Physical Uplink Control Channel), PUSCH (Physical Uplink Shared Channel), and the corresponding DMRS within the UL BWP. Depending on the current NR process, the parameter set may correspond to SCS (Subcarrier Spacing), OFDM symbol length, number of OFDM symbols included in a time slot, CP (Cyclic Prefix) length, etc.

[0024] To address the first problem, the present invention provides a method and system for a UE to determine the channel structure (e.g., transmission attributes) of the transmission link between the UE and the BS based on an SFI indication received from the BS under different waveform parameter sets (e.g., different parameter sets corresponding to different BWPs to be activated). According to various embodiments of this disclosure, the SFI mode may cover a predetermined number of time slots or OFDM symbols, or a predetermined time length; and the UE can determine the channel structure under different parameter sets with or without aligned transmission attributes.

[0025] Regarding the second issue, 5G / NR systems currently use the OTHER field to signify "unknown." That is, without making any assumptions and without resolving the OTHER field to "empty," the terminal interprets the OTHER field as "transmission direction undetermined." To address this second issue, according to some embodiments of this disclosure, the present invention provides methods and systems for a UE to update transmission attributes in the OTHER field to receive and / or transmit downlink and / or uplink signals in the OTHER field when the transmission direction indicated by the SFI is updated via the transmission direction indicated by the UE-specific DCI and / or via the transmission direction under a semi-static configuration.

[0026] The methods disclosed in this invention can be implemented in a cellular communication network comprising one or more cells. Each cell may include at least one base station (BS) operating on its allocated bandwidth to provide adequate wireless coverage to its target users (e.g., user equipment). In various embodiments, the BS in this disclosure may include, or be implemented as a next-generation node B (gNB), a transmit / receive point (TRP), an access point (AP), etc. In this invention, the terms "terminal" and "UE" will be used interchangeably.

[0027] The BS and UE devices can communicate with each other via a communication link (e.g., via a downlink radio frame from the BS to the UE or via an uplink radio frame from the UE to the BS). Each radio frame can be further segmented into subframes that may include data symbols. According to various embodiments of this disclosure, the BS and UE can generally be described herein as non-limiting examples of "communication nodes" or "nodes" that can implement the methods disclosed herein and can have wireless and / or wired communication capabilities.

[0028] Figure 1 A block diagram of a base station (BS) 100 is shown according to some embodiments of this disclosure. The BS 100 is an example of a device that can be configured to implement the methods described herein. Figure 1 As shown, BS 100 includes a housing 140, which contains a system clock 102, a processor 104, a memory 106, a transceiver 110 including a transmitter 112 and a receiver 114, a power module 108, a BWP configuration generator 120, a channel structure indication generator 122, a codebook set configuration generator 124, and a parallel transmission attribute indicator 126.

[0029] In this embodiment, system clock 102 provides timing signals to processor 104 for timing all operations of BS 100. Processor 104 controls the general operation of BS 100 and may include one or more processing circuits or modules, such as a central processing unit (CPU) and / or any combination of the following components: general-purpose microprocessor, microcontroller, digital signal processor (DSP), field-programmable gate array (FPGA), programmable logic device (PLD), controller, state machine, closed logic, discrete hardware components, dedicated hardware finite state machine, or any other suitable circuit, device, and / or structure capable of performing computation or other data processing.

[0030] Memory 106 may include read-only memory (ROM) and random access memory (RAM), which can provide instructions and data to processor 104. A portion of memory 106 may also include non-volatile random access memory (NVRAM). Processor 104 typically performs logical and arithmetic operations based on program instructions stored in memory 106. These instructions (also referred to as software) stored in memory 106 can be executed by processor 104 to perform the methods described herein. Processor 104, together with memory 106, forms a processing system that stores and executes software. As used herein, “software” means any type of instructions that can configure a machine or device to perform one or more desired functions or processes, whether or not it is referred to as software, firmware, middleware, microcode, etc. Instructions may include code (e.g., in source code format, binary code format, executable code format, or any other suitable code format). When these instructions are executed by one or more processors, they cause the processing system to perform the various functions described herein.

[0031] Transceiver 110, including transmitter 112 and receiver 114, allows BS 100 to send data to and receive data from remote devices (e.g., UE or another BS). Antenna 150 is typically attached to housing 140 and electrically coupled to transceiver 110. In various embodiments, BS 100 includes (not shown) multiple transmitters, multiple receivers, multiple transceivers, and / or multiple antennas. Transmitter 112 can be configured to wirelessly transmit packets with different packet types or functions, such packets being generated by processor 104. Similarly, receiver 114 is configured to receive packets with different packet types or functions, and processor 104 is configured to process multiple packets of different packet types. For example, processor 104 can be configured to determine packet types and process packets and / or packet fields accordingly.

[0032] The channel structure indication generator 122 can generate a radio signal indicating channel structure information about the transmission link between the BS 100 and the UE. For example, this radio signal could be a group common PDCCH signal carrying an SFI, which would be broadcast to the UE device group. The channel structure indication generator 122 can transmit the radio signal to the UE device group via transmitter 112 so that each UE can determine the channel structure of the transmission link between the BS 100 and the UE on the BPW for a predetermined duration based on a waveform parameter set (e.g., a parameter set) corresponding to the BWP.

[0033] According to various embodiments of this teaching, the predetermined duration represents the effective time range of the SFI indication, and it is determined by standardization requirements, semi-static configuration, or dynamic indication generated by the channel structure indication generator 122. According to different embodiments, the effective time range of the SFI indication can be an absolute time period independent of any waveform parameter set or a relative time period related to a predetermined waveform parameter set. In the latter case, the length of the relative time period depends on the values ​​of the waveform parameter set, such as a parameter set that can be equal to at least one of: (a) the source parameter set under which the SFI mode is indicated to the UE; (b) the target parameter set under which the UE will determine the transmission attributes of the transmission link; and (c) the transmission parameter set under which the radio signal is transmitted to the UE's BWP.

[0034] BWP configuration generator 120 can configure or activate one or more BWPs for a UE. For example, to determine the channel structure on N (N is an integer greater than 1) BWPs for a UE, the UE can be configured to detect and receive SFIs on one or more of the N BWPs. The N BWPs can have the same or different parameter sets. BWP configuration generator 120 can configure the parameter set independently for each BWP and notify the BWP configuration to channel structure indication generator 122, which is used to generate SFI indications.

[0035] The codebook configuration generator 124 can generate and configure a structure codebook set. According to different embodiments of the invention, the structure codebook set includes a set of channel structure patterns (e.g., SFI patterns) covering a predetermined number of time slots or OFDM symbols, or a predetermined time length. The codebook configuration generator 124 can notify the UE of the structure codebook set based on a standardized or semi-static configuration. With knowledge of the structure codebook set, the UE can obtain a specific SFI pattern by looking up the structure codebook according to the SFI indication generated and transmitted by the channel structure indication generator 122, and determine the channel structure of the transmission link between the BS 100 and the UE on the BWP based on the specific SFI pattern while considering the parameter set corresponding to the BWP.

[0036] The parallel transmission attribute indicator 126 can generate indications of transmission attributes for a transmission link in a manner parallel to the SFI indication. For example, the parallel transmission attribute indicator 126 can indicate transmission attributes based on UE-specific DCIs and / or semi-static configuration signals. When an SFI is broadcast to a group of UEs in a group common PDCCH, a UE-specific DCI is sent to a specific UE via transmitter 112. When the transmission direction indicated by the SFI conflicts with the parallel indicator generated by the parallel transmission attribute indicator 126, the UE can update the transmission attributes based on the latest transmission attribute indication.

[0037] In one embodiment, processor 104 can determine which scheme to use to determine the channel structure. For example, processor 104 can determine whether the SFI mode covers a predetermined number of time slots or OFDM symbols, or a predetermined time length; and can also determine whether the UE should determine the channel structure under different parameter sets with or without aligned transmission attributes. Processor 104 can determine the scheme based on standardization or dynamic configuration.

[0038] The power module 108 may include a power source such as one or more batteries and a power regulator to provide the regulated power to the battery. Figure 1 Each of the modules described above. In some embodiments, if BS 100 is coupled to a dedicated external power source (e.g., a wall outlet), the power module 108 may include a transformer and a power conditioner.

[0039] The modules described above are coupled together via bus system 130. Bus system 130 may include a data bus (e.g., a power bus, a control signal bus), and / or a status signal bus other than a data bus. It should be understood that the modules of BS 100 can be operatively coupled to each other using any suitable technology and medium.

[0040] Although Figure 1 Multiple discrete modules or components are shown, but those skilled in the art will understand that one or more of the modules can be implemented in combination or in common. For example, processor 104 can implement not only the functions described above with respect to processor 104, but also the functions described above with respect to BWP configuration generator 120. Conversely, multiple discrete components or elements can be used to implement... Figure 1 Each of the modules shown in the diagram.

[0041] Figure 2 According to some embodiments of this disclosure, a method for indicating channel structure information is illustrated by a BS (e.g., Figure 1 The flowchart below shows the method 200 performed by the BS (BS 100). At 202, the BS configures an effective duration for the UE to determine the channel structure of the transmission link between the BS and the UE on the BWP set. At 204, the BS configures a set of waveform parameters for each BWP in the BWP set. At 206, the BS generates a radio signal indicating channel structure information based on a structure codebook set that has been notified to the UE based on a standardized or semi-static configuration. At 208, the BS then transmits the radio signal to the UE.

[0042] Figure 3 Block diagrams of user equipment (UE) 300 are shown according to some embodiments of this disclosure. UE 300 is an example of a device that can be configured to implement the methods described herein. Figure 3As shown, the UE 300 includes a housing 340, which contains a system clock 302, a processor 304, a memory 306, a transceiver 310 including a transmitter 312 and a receiver 314, a power module 308, an SFI mode determiner 320, a parameter set comparison unit 322, a parameter set determiner 324, a transmission attribute determiner 326, and a transmission attribute updater 328.

[0043] In this embodiment, the system clock 302, processor 304, memory 306, transceiver 310, and power module 308 operate similarly to the system clock 102, processor 104, memory 106, transceiver 110, and power module 108 in BS 100. Antenna 350 is typically attached to housing 340 and electrically coupled to transceiver 310.

[0044] SFI mode determiner 320 can receive radio signals from BS (e.g., BS 100) via receiver 314 and obtain channel structure information indicated by the radio signals. As described above, the radio signal can be a group common PDCCH signal carrying SFI broadcast to a group of UE devices associated with the BS. Based on the SFI indication obtained from the radio signals, SFI mode determiner 320 can obtain a specific SFI mode by looking up a structure codebook determined based on a standardized or semi-static configuration. SFI mode determiner 320 can send the indicated SFI mode to parameter set comparison unit 322 for parameter set comparison and transmission attribute determiner 326 for determining transmission attributes.

[0045] When UE 300 receives and detects radio signals on the first BWP set, UE 300 can determine the channel structure on the second BWP set, which includes the first BWP set. The second BWP set can have the same or different parameter sets. Each BWP in the first and second BWP sets can be determined based on at least one of the following: standardization requirements, semi-static configuration, dynamic configuration, and other channel signals. Parameter set determiner 324 can determine a parameter set called a target parameter set for each BWP in the second BWP set, referred to as a target BWP, based on at least one of the following: radio signals, the transmission parameter set of the target BWP, standardization requirements, semi-static configuration, dynamic configuration, and other channel signals. Parameter set determiner 324 can send each target parameter set to parameter set comparison unit 322 for parameter set comparison and transmission attribute determiner 326 for determining transmission attributes.

[0046] The parameter set comparison unit 322 may receive both the indicated SFI mode from the SFI mode determiner 320 and the target parameter set from the parameter set determiner 324. In some embodiments, the indicated SFI mode is independent of any parameter set and is only related to a predetermined number of OFDM symbols (i.e., the slot length in the indicated SFI mode). In such cases, the parameter set comparison unit 322 may compare the slot length in the indicated SFI mode with the slot length under each target parameter set. In other embodiments, the indicated SFI mode is associated with a specific parameter set referred to as the source parameter set. This source parameter set may be determined based on at least one of the following: standardization requirements, semi-static configuration, dynamic configuration, and other channel signals. In such cases, the parameter set comparison unit 322 may compare the source parameter set with each target parameter set. In either case, based on the comparison result, the parameter set comparison unit 322 may determine a channel structure conversion scheme for the transmission attribute determiner 326 to determine the transmission attributes of the transmission link between BS 100 and UE 300 on each target BWP. According to different embodiments, the conversion scheme may include concatenation and / or segmentation operations applied only to OFDM symbols under the target parameter set for a predetermined duration, where the predetermined duration represents the effective time range indicated by SFI.

[0047] The transmission attribute determiner 326 can determine the transmission attributes of the transmission link between BS 100 and UE 300 on each target BWP within a predetermined duration based on the target parameter set determined by parameter set determiner 324, the indicated SFI mode determined by SFI mode determiner 320, and the conversion scheme determined by parameter set comparison unit 322.

[0048] The transmission attribute updater 328 may receive updated transmission attribute indications from the BS 100 via the receiver 314, for example, based on UE-specific DCI and / or semi-static configuration signals. When the transmission direction indicated by the SFI conflicts with the parallel indicator received by the transmission attribute updater 328, the transmission attribute updater 328 may update the transmission attributes based on the latest transmission attribute indication.

[0049] Figure 4 According to some embodiments of this disclosure, a UE (e.g.) is shown. Figure 3The flowchart illustrates a method 400 performed by the UE (300) in determining and updating channel structure information. At 402, the UE receives a radio signal from the BS. At 404, the UE obtains channel structure information from the radio signal, indicating the channel structure of the transmission link between the BS and the UE. At 406, the UE determines a set of waveform parameters configured by the BS and the effective duration. At 408, the UE determines the transmission attributes of the transmission link within the effective duration based on the waveform parameter set; optionally, at 410, the UE updates one or more transmission attributes of the transmission link upon receiving a parallel transmission attribute indication from the BS.

[0050] Different embodiments of this disclosure will be described in detail below. It should be noted that the features of these embodiments and examples in this disclosure can be combined with each other in any manner without conflict.

[0051] In Example 1, the indicated SFI mode corresponds to a predetermined number of OFDM symbols for the UE to determine the channel structure under different target parameter sets. Based on the BS's standardized or semi-static configuration, the UE can understand the codebook set of the SFI modes, which include SFI mode 1, SFI mode 2...SFI mode N, where different SFI modes represent different channel structures, such as time slot structures. For example, SFI mode 1 represents {7'D'2'O'5'U'}, SFI mode 2 represents {12'D'1'O'1'U'}, SFI mode 3 represents {2'D'1'O'10'U'1'O'}, SFI mode 4 represents {3'D'2'O'2'U'}, etc., where "D" represents OFDM symbols or symbol groups with "downlink" transmission attributes, "U" represents OFDM symbols or symbol groups with "uplink" transmission attributes, and "O" represents OFDM symbols or symbol groups with "other" transmission attributes. All SFI modes in the codebook can indicate a slot structure with the same number of OFDM symbols, or they can indicate a slot structure with different numbers of OFDM symbols. Regardless of whether the number is the same, for a given SFI mode, it indicates a slot structure with a slot length of N0 OFDM symbols, where N0 is a positive integer, such as N0 = 7 or N0 = 14.

[0052] The UE receives an SFI indication from the BWP's CORESET (Control Resource Set), which indicates a specific SFI mode in the codebook, where the BWP's parameter set is configured as parameter set 1. The time slots under parameter set 1 contain N1 OFDM symbols. It should be understood that the transmission parameter set (the parameter set transmitted by the BWP) may differ from the target parameter set in some other embodiments, even when the transmission parameter set (the parameter set transmitted by the BWP) is equal to the target parameter set in this embodiment.

[0053] By comparing N0 and N1, the UE can determine the different transition schemes used to determine the channel structure.

[0054] If N1 equals N0, the UE can complete a one-to-one mapping for each OFDM symbol according to the indicated SFI mode. For example... Figure 5 As shown, the UE can determine the transmission properties of N1 OFDM symbols in each time slot within the valid time slot indicated by SFI 510 and within the frequency domain of the BWP. Figure 5 Examples 520, 530, and 540 of different OFDM symbol lengths (or subcarrier spacings) under parameter set 1 are shown, where N0 = N1 = 14. Regardless of the size of the OFDM symbol length (or subcarrier spacing) under parameter set 1, the UE can map only the transmission attributes of each OFDM symbol indicated in SFI mode 510 to the corresponding OFDM symbol under parameter set 1.

[0055] If N1 is less than N0, the time slot indicated by the SFI mode can be divided into multiple time slots under parameter set 1. Typically, N0 is an integer multiple of N1, i.e., N0 = N1 * k, where k is a positive integer. Figure 6 As shown, when N0 = 14 and N1 = 7, one N0 is divided into two N1s, and then the time slot structure of the two cascaded time slots under parameter set 1 corresponds to the time slot structure indicated by SFI mode 610. Figure 6 Examples 620, 630, and 640 show different OFDM symbol lengths (or subcarrier spacings) under parameter set 1. Regardless of the size of the OFDM symbol length (or subcarrier spacing) under parameter set 1, the terminal can map the transmission attributes of each of the N0 OFDM symbols in one slot under SFI mode to the corresponding OFDM symbols in each of the k slots under parameter set 1, which includes N1 OFDM symbols, where the OFDM symbols in the k slots under parameter set 1 are assigned transmission attributes one by one according to the indication of SFI mode.

[0056] If N1 is greater than N0, the UE can concatenate the time slot structure indicated by the SFI mode to obtain the time slot structure under parameter set 1. Typically, N1 is an integer multiple of N0, i.e., N1 = N0 * k, where k is a positive integer. For example... Figure 7 As shown, two time slot structures containing N0 OFDM symbols indicated by SFI mode 710 are cascaded, and the OFDM symbol transmission properties of the cascaded time slot structures are mapped to a time slot containing N1 OFDM symbols under parameter set 1. Figure 7 Examples 720, 730, and 740 show different OFDM symbol lengths (or subcarrier spacings) under parameter set 1. The size of the OFDM symbol length (or subcarrier spacing) under parameter set 1 does not affect the operation of assigning transmission attributes character by character after concatenation.

[0057] It should be understood that even when N1 is not an integer multiple of N0 and N0 is not an integer multiple of N1, the split or concatenation operation can still be applied to only N1 symbols for the effective duration.

[0058] It should be understood that, in this embodiment, when the channel structure in the codebook corresponds to a time slot, the channel structure in the codebook can correspond to any of the following in various embodiments of the present invention: one or more radio frames, one or more subframes, one or more time slots, and one or more time slot groups. It should also be understood that, when each channel structure in this embodiment covers one or more OFDM symbols and illustrates a pattern of transmission attributes in a series of OFDM symbols, the channel structure pattern can typically illustrate a pattern of transmission attributes in one or more units, wherein each time unit can include any of the following: one or more OFDM symbols, one or more OFDM symbol groups, one or more micro-time slots, and one or more time slots.

[0059] Example 1 does not emphasize or require the length of a single OFDM symbol in SFI mode. Based on the standardized or semi-static configuration of SFI mode, the length of a single OFDM symbol may or may not be recognized. If the length of a single OFDM symbol is not recognized, only the number of OFDM symbols corresponding to the SFI mode needs to be provided.

[0060] Example 1 can be applied to situations where the BS configures and activates a single BWP or multiple BWPs for the UE, and where the BS sends a single SFI or multiple SFIs to the UE, including the following cases:

[0061] In the first scenario, the BS configures and activates only one BWP for the UE. The UE detects and receives the SFI transmitted on the CORESET of the activated BWP, reads the SFI mode indication from the SFI of the activated BWP, and determines the slot structure on the activated BWP based on the indication using the method described in this embodiment.

[0062] In the second scenario, the BS configures and activates multiple BWPs for the UE. The UE detects and receives the SFI from only one of the multiple BWPs; reads the SFI mode indication from the SFI; and determines the slot structure on each of the multiple active BWPs based on the indication using the method described in this embodiment.

[0063] In the third scenario, the BS configures and activates multiple BWPs for the UE. The UE detects and receives SFIs on at least some (all or some, but more than one) of the multiple BWPs. The UE can receive multiple SFIs. The UE reads the SFI mode indication from BWP x and determines the time slot structure on the activated BWP x based on the indication using the method described in this embodiment. The UE reads the SFI mode indication from BWP y and determines the time slot structure on the activated BWP y based on the indication using the method described in this embodiment. That is, the UE independently determines the time slot structure of each BWP according to the SFI indication of each BWP.

[0064] In Example 2, the indicated SFI mode corresponds to a predetermined time length, and the transmission attributes under different parameter sets are aligned in the time domain. Based on the BS's standardized or semi-static configuration, the UE can understand the codebook set under parameter set 0 (source parameter set), which includes SFI mode 1, SFI mode 2...SFI mode N, where different SFI modes represent different time slot structures under parameter set 0. Parameter set 0 has its own specific SCS, OFDM symbol length, and number of OFDM symbols contained in the time slot, denoted as SCS0, OSL0, and N0, respectively. Based on OSL0 and N0, the time slot length under parameter set 0 can be determined, where T0 = OSL0 * N0, and the source parameter set can be determined based on at least one of the following: standardization requirements, semi-static configuration, dynamic configuration, and other channel signals.

[0065] The UE reads the SFI from the BWP's CORESET to obtain the SFI mode, where the BWP's parameter set is configured as parameter set 1 (target parameter set). Parameter set 1 has its own specific SCS, OFDM symbol length, and number of OFDM symbols included in the time slot, denoted as SCS1, OSL1, and N1, respectively. Based on OSL1 and N1, the time slot length T1 under parameter set 1 can be determined, where T1 = OSL1 * N1. It should be understood that when the transmission parameter set (the parameter set sent by the BWP) is equal to the target parameter set in this embodiment, the transmission parameter set may be different from the target parameter set in some other embodiments.

[0066] By comparing parameter set 0 and parameter set 1, the UE can determine different transition schemes used to determine the channel structure.

[0067] If parameter set 0 is the same as parameter set 1, that is, SCS0 equals SCS1, OSL0 equals OSL1, and N0 equals N1, then after the UE reads the SFI mode in the SFI, the UE can directly map the SFI mode indication of the transmission attributes of each of the N0 symbols 810 under parameter set 0 to the corresponding symbol in the N1 symbol 820 under parameter set 1, such as... Figure 8As shown in the image.

[0068] If parameter set 0 is different from parameter set 1, there are three different cases, as shown below.

[0069] In the first case, SCS0 and SCS1 are equal, OSL0 and OSL1 are equal, but N0 and N1 are not equal. When N0 is greater than N1, such as... Figure 9 As shown, a time slot 910 indicated by SFI mode under parameter set 0 is divided into multiple time slots 920 under parameter set 1. When N0 is less than N1, the multiple time slots 1010 indicated by SFI mode under parameter set 0 are concatenated to a time slot 1020 under parameter set 1, as shown. Figure 10 As shown in the image.

[0070] In the second case, SCS0 and SCS1 are not equal, OSL0 and OSL1 are not equal, and N0 and N1 are equal. For example... Figure 11 As shown, when OSL0 is greater than OSL1 (equivalent to SCS0 being less than SCS1), typically T0 = k * T1, where k is a positive integer. The transmission attributes of each OFDM symbol 1110 under parameter set 0 indicated by the SFI mode are mapped to multiple (k) OFDM symbols 1120 under parameter set 1. When OSL0 is less than OSL1 (equivalent to SCS0 being greater than SCS1), typically T0 = T1 / k, where k is a positive integer. The transmission attributes of multiple OFDM symbols 1110 under parameter set 0 indicated by the SFI mode are mapped to a corresponding OFDM symbol 1130 under parameter set 1. Based on this method, it is ensured that the "D", "O", and "U" fields of the two time slot structures under parameter set 0 and parameter set 1 are aligned with each other in the time domain. That is, the time slot structure within time slot length T0 under parameter set 0 indicated by the SFI mode is consistent with the time slot structure within time slot length T0 (possibly k * T1 or T1 / k) under parameter set 1.

[0071] In the third case, SCS0 and SCS1 are not equal, OSL0 and OSL1 are not equal, and N0 and N1 are not equal. For example... Figure 12 and Figure 13 As shown, this method is similar to the method in the second case, aiming to ensure that the "D", "O", and "U" fields in the two time-slot structures under parameter set 0 and parameter set 1 are aligned with each other in the time domain. Figure 12 As shown, the transmission properties of an OFDM symbol 1210 under parameter set 0 indicated by SFI mode can be mapped to two OFDM symbols 1222 and 1224 in two different time slots under parameter set 1. Figure 13As shown, the transmission properties of two OFDM symbols 1312 and 1314 in two different time slots under parameter set 0 indicated by SFI mode can be mapped to different parts 1322 and 1324 in a corresponding OFDM symbol under parameter set 1.

[0072] For the second and third cases, when the slot length T1 under parameter set 1 is not equal to the slot length T0 under parameter set 0, the range of cascading or splitting can be determined based on either of the following: (a) the effective duration of SFI determined by standardization requirements or semi-static configuration or dynamic indication; or (b) the number of effective SFI slots determined by semi-static configuration or dynamic indication.

[0073] In the first scenario, based on standardization requirements, semi-static configuration, or dynamic indication, the UE can determine the effective time range of the SFI indication to be M0 OFDM symbols. Then, when the UE determines the slot structure under parameter set 1, the UE can only determine the slot structure within the effective time range M0*OSL0. Split or concatenation operations cannot be applied to slots or OFDM symbols outside the effective time range (regardless of whether N0 is equal to N1*k, and regardless of whether N0 is equal to N1 / k).

[0074] Alternatively, in the first case, based on standardization requirements, semi-static configuration, or dynamic indication, the UE can determine the effective time range of the SFI indication to be M0 time slots. Then, when the UE determines the time slot structure under parameter set 1, the UE can determine only the time slot structure within the effective time range M0*T0. Split or cascade operations cannot be applied to time slots or OFDM symbols outside the effective time range.

[0075] In the second scenario, based on standardization requirements, semi-static configuration, or dynamic indication, the UE can determine the effective time range of the SFI indication to be M0 OFDM symbols. Then, when the UE determines the slot structure under parameter set 1, the UE can only determine the slot structure within the effective time range M0*OSL1. Split or concatenation operations cannot be applied to slots or OFDM symbols outside the effective time range.

[0076] Alternatively, in the second case, based on standardization requirements, semi-static configuration, or dynamic indication, the UE can determine the effective time range of the SFI indication to be M0 time slots. Then, when the UE determines the time slot structure under parameter set 1, the UE can determine only the time slot structure within the effective time range M0*T1. Split or cascade operations cannot be applied to time slots or OFDM symbols outside the effective time range.

[0077] It should be understood that although the effective time range indicated by the SFI in this embodiment covers a single SFI mode, in other embodiments the effective time range indicated by the SFI may cover multiple SFI modes. For example, the effective time range may cover five time slots, where the first two time slots follow SFI mode 1 and the remaining three time slots follow SFI mode 2. In another example, the effective time range may cover time slots including the upper half following SFI mode 3 and the lower half following SFI mode 4.

[0078] In Example 3, the method in Example 2 is applied to multiple BWPs.

[0079] When the BS configures and activates N (N is an integer greater than 1) BWPs for the UE, the UE can be configured to detect and receive SFIs on N BWPs or detect or receive SFIs on only one of the BWPs. The parameter set for each BWP can be configured individually. The BS can configure the parameter set of BWP1 as parameter set 1, the parameter set of BWP2 as parameter set 2, and so on, and configure the parameter set of BWP N as parameter set N.

[0080] The BS can configure the UE to detect and receive SFI on only one BWP in the BWPs. Assume the BS configures the UE to detect and receive SFI on BWP x (x is a positive integer within [1, N]), and then the slot pattern indicated by the SFI corresponds to parameter set X. For N-1 BWPs other than BWP x, regardless of whether the configured parameter set is the same as parameter set x, the UE determines the slot structure of all N BWPs based on the SFI under parameter set x. The specific method is the same as in Example 2.

[0081] The BS can also configure the UE to detect and receive SFIs on each BWP. For BWP x, if its parameter set is parameter set x, then the slot pattern read by the BS on the BWP corresponds to parameter set x. For BWP y, if its parameter set is parameter set y, then the slot pattern read by the BS on the BWP corresponds to parameter set y.

[0082] In Example 4, the indicated SFI mode corresponds to a predetermined number of time slots or OFDM symbols, and it is not necessary to ensure that the transmission attributes under different parameter sets are aligned in the time domain. Based on the BS's standardized or semi-static configuration, the UE can understand the codebook set under parameter set 0, which includes SFI mode 1, SFI mode 2...SFI mode N, where different SFI modes represent different time slot structures under parameter set 0. Parameter set 0 has its own specific SCS, OFDM symbol length, and number of OFDM symbols contained in the time slot, which are represented as SCS0, OSL0, and N0, respectively. Based on OSL0 and N0, the time slot length T0 under parameter set 0 can be determined, where T0 = OSL0 * N0.

[0083] The UE reads the SFI from the BWP's CORESET to obtain the SFI mode, where the BWP's parameter set is configured as parameter set 1 (target parameter set). Parameter set 1 has its own specific SCS, OFDM symbol length, and number of OFDM symbols included in the time slot, which are represented as SCS1, OSL1, and N1, respectively. Based on OSL1 and N1, the time slot length T1 under parameter set 1 can be determined, where T1 = OSL1 * N1. It should be understood that when the transmission parameter set (the parameter set sent by the BWP) is equal to the target parameter set in this embodiment, the transmission parameter set may be different from the target parameter set in some other embodiments.

[0084] By comparing parameter set 0 and parameter set 1, the UE can determine the different conversion schemes used to determine the channel structure.

[0085] If N0 under parameter set 0 is equal to N1 under parameter set 1, then the UE can directly map the transmission attributes indicated by the SFI mode of each of the N0 symbols 1410 to the corresponding symbol in the N1 symbols 1420 without considering whether OSL1 (or SCS1) under parameter set 1 is equal to OSL0 (or SCS0) under parameter set 0. Figure 14 As shown in the image.

[0086] If N0 under parameter set 0 is not equal to N1 under parameter set 1, then when N0 = k * N1, where k is a positive integer, the UE can divide time slot 1510 under parameter set 0 into k time slots 1520, 1530, and 1540 under parameter set 1, and then determine the transmission attributes of each OFDM symbol under parameter set 1 according to the SFI mode indication under parameter set 0, such as... Figure 15 As shown in the diagram. When N0 = N1 / k and k is a positive integer, the UE can concatenate k time slots 1610 under parameter set 0 into one time slot 1620, 1630, 1640 under parameter set 1, and then determine the transmission attributes of each OFDM symbol under parameter set 1 according to the SFI mode indication under parameter set 0, such as... Figure 16 As shown in the diagram. Similarly, the system does not consider whether OSL1 (or SCS1) under parameter set 1 is equal to OSL0 (or SCS0) under parameter set 0.

[0087] Based on standardization requirements, semi-static configuration, or dynamic indications, the UE can determine that the effective time range of the SFI indication is M0 OFDM symbols. Then, when the UE determines the slot structure under parameter set 1, the UE can only determine the slot structure within the effective time range M0*OSL1. Split or cascade operations cannot be applied to slots or OFDM symbols outside the effective time range. Alternatively, based on standardization requirements, semi-static configuration, or dynamic indications, the UE can determine that the effective time range of the SFI indication is M0 slots. Then, when the UE determines the slot structure under parameter set 1, the UE can only determine the slot structure within the effective time range M0*T1. Furthermore, split or cascade operations cannot be applied to slots or OFDM symbols outside the effective time range.

[0088] In Example 5, the method in Example 4 is applied to multiple BWPs, wherein Example 5 may follow steps similar to those in Example 3.

[0089] In Embodiment 6, a method is disclosed for resolving a problem when the SFI indication conflicts with UE-specific DCI and / or semi-static configuration signals. When certain conditions are met, the UE is able to receive semi-static configured periodic or aperiodic downlink signals on OFDM symbols with the "O" field indicated by the SFI, or transmit semi-static configured periodic or aperiodic uplink signals, such as... Figure 17 As shown in the image.

[0090] At time t1 1710, the UE can determine the time slot structure on the BWP using one of the methods in Embodiments 1 to 5 based on the received SFI indication. The time slot structure includes an "O" field. For OFDM symbols with a transmission attribute of "O", the UE cannot receive / transmit any downlink / uplink signals or downlink / uplink channels on these OFDM symbols.

[0091] At time t2 1720, the UE receives a UE-specific DCI indicating that an OFDM symbol with transmission attribute "0" is used for DL ​​transmission. Then, starting from t2, in addition to DL or UL transmission on the corresponding symbol indicated by the UE-specific DCI, the UE can also receive semi-statically configured periodic or aperiodic downlink signals, such as CSI-RS (Channel State Information-Reference Signal), DMRS (Demodulation Reference Signal), etc., on OFDM symbol 102 that can be used for DL ​​transmission and has transmission attribute "0".

[0092] At time t3 1730, the UE receives the updated SFI instruction and repeats the previous operation according to the updated SFI instruction.

[0093] At time t4 1740, the UE receives a UE-specific DCI indicating that an OFDM symbol with transmission attribute "0" is used for UL transmission. Then, starting from t4, in addition to DL or UL transmission on the corresponding symbol indicated by the UE-specific DCI, the UE can also transmit semi-statically configured periodic or aperiodic uplink signals, such as SRS (Sound Reference Signal), DMRS, etc., on OFDM symbol 104 with transmission attribute "0" used for UL transmission.

[0094] In Embodiment 7, a method for determining a protection period (GP) between two transmissions in different directions is disclosed. The UE needs a transmission time GP between an uplink transmission and a downlink transmission, or between a downlink transmission and an uplink transmission. In this embodiment, the GP must be within a time range where the transmission attribute indicated by the SFI mode is "0". The GP may occupy the entire "0" field or exactly a portion of the "0" field.

[0095] While various embodiments of the present disclosure have been described above, it should be understood that they are presented by way of example only and not by way of limitation. Similarly, various diagrams may be used to illustrate exemplary architectures or configurations of the invention, provided to assist those skilled in the art in understanding the exemplary features and functions of the present disclosure. However, such persons will understand that the present disclosure is not limited to the described exemplary architectures or configurations, but can be implemented using various alternative architectures and configurations. Furthermore, as will be understood by those skilled in the art, one or more features in one embodiment may be combined with one or more features in another embodiment described herein. Therefore, the exemplary embodiments described above should not limit the breadth and scope of the present disclosure.

[0096] It should also be understood that any reference to elements in this document using names such as "first," "second," etc., generally does not restrict the number or order of those elements. Rather, these names may be used herein as a convenient way to distinguish two or more elements or instances of elements. Therefore, references to first and second elements do not imply that only two elements can be used in some method, or that the first element must precede the second element.

[0097] Furthermore, those skilled in the art will understand that information and signals can be represented using any of a variety of different techniques and methods. For example, data, instructions, commands, information, signals, bits, and symbols that may be referenced in the above description can be represented by voltage, current, electromagnetic waves, magnetic fields or particles, light fields or particles, or any combination thereof.

[0098] Those skilled in the art will further understand that any of the various illustrative logic blocks, modules, processors, devices, circuits, methods, and functions described in conjunction with the aspects disclosed herein can be implemented by electronic hardware (e.g., digital implementation, analog implementation, or a combination of both, which may be designed using source coding or some other technique), various forms of program or design code combined with instructions (which may be referred to herein as "software" or "software module" for convenience), or a combination of both.

[0099] To clearly describe the interchangeability of hardware, firmware and software, various illustrative components, blocks, modules, circuits and steps, they have been generally described above according to their functions. Whether such functions are implemented as hardware, firmware or software, or a combination of these technologies, depends on the specific application and design constraints imposed on the overall system. Those skilled in the art can implement the functions in various ways for each specific application, and such implementation decisions should not be construed as causing a departure from the scope of this disclosure. According to various embodiments, processors, devices, components, circuits, structures, machines, modules, etc., can be configured to perform one or more of the functions described herein. The terms “configured for” or “configured to” as used herein with respect to a particular operation or function refer to processors, devices, components, circuits, structures, machines, modules, etc., which are physically constructed, programmed and / or arranged to perform a particular operation or function.

[0100] Furthermore, those skilled in the art will understand that the various illustrative logic blocks, modules, devices, components, and circuits described herein may be implemented within or executed by an integrated circuit (IC), which may include 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, or any combination thereof. Logic blocks, modules, and circuits may also include antennas and / or transceivers for communication with various components within a network or device. A general-purpose processor may be a microprocessor, but alternatively, it may be any conventional processor, controller, or state machine. The processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors incorporating a DSP core, or any other suitable configuration) to perform the functions described herein.

[0101] If implemented as software, its functionality can be stored as one or more instructions or code on a computer-readable medium. Therefore, the steps of the methods or algorithms disclosed herein can be implemented as software stored on a computer-readable medium. Computer-readable media include computer storage media and communication media, which contain any medium capable of transmitting computer programs or code from one location to another. Storage media can be any available medium accessible to a computer. By way of example, and not limitation, such computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disc storage, disk storage or other magnetic storage devices, or any other medium that can be used to store desired program code (in the form of computer-accessible instructions or data structures).

[0102] In this document, the term "module" as used herein refers to software, firmware, hardware, and any combination of these elements for performing the relevant functions described herein. Furthermore, for the purposes of discussion, each module is described as a discrete module; however, it will be apparent to those skilled in the art that two or more modules can be combined to form a single module that performs the relevant discrete functions according to embodiments of the invention.

[0103] Furthermore, memory or other storage devices, as well as communication components, may be employed in embodiments of the invention. It will be understood that, for clarity, the above description has described embodiments of the invention with respect to different functional units and processors. However, it will be apparent that any suitable distribution of functionality among different functional units, processing logic elements, or domains may be used without prejudice to the invention. For example, functions described as being performed by separate processing logic elements or controllers may be performed by the same processing logic element or controller. Therefore, references to specific functional units are merely references to suitable means for providing said functionality and do not indicate a strict logical or physical structure or mechanism.

[0104] Various modifications to the embodiments described in this disclosure will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments without departing from the scope of this disclosure. Therefore, this disclosure is not intended to be limited to the embodiments shown herein, but is to be endowed with the broadest scope consistent with the novel features and principles disclosed herein, as set forth in the following claims.

Claims

1. A method executed by a first node, the method comprising: Receive wireless signals from the second node; Acquire the transmission direction pattern of multiple OFDM symbols of the transmission link between the first node and the second node, as indicated by the wireless signal; A first set of waveform parameters is determined for the transmission direction mode indicated by the wireless signal, wherein the first set of waveform parameters is associated with a first bandwidth portion (BWP) set; Receive semi-static configuration from the second node; A second waveform parameter set is determined based on the semi-static configuration, wherein the second waveform parameter set is related to a second BWP set, and the second BWP set includes the first BWP set. as well as Based on the transmission direction pattern, the transmission direction of the transmission link on the BWP of the second BWP set between the first node and the second node within a predetermined duration corresponding to the first waveform parameter set is determined, wherein the transmission direction is determined based on a comparison result obtained by comparing the first waveform parameter set and the second waveform parameter set, and wherein the predetermined duration represents the effective time range of the transmission direction and the predetermined duration is determined based on an absolute time period independent of any waveform parameter set.

2. The method according to claim 1, wherein, The transmission direction includes at least one field, the at least one field including: Downlink DL field, in which the first node is able to receive downlink signals; Uplink UL field, in which the first node is capable of sending uplink signals; or The OTHER field, in which the first node is able to receive a downlink signal or send an uplink signal accordingly after receiving a dynamic indication from the second node indicating that the OTHER field is updated to a DL field or a UL field, wherein each of the uplink signal and the downlink signal is a semi-statically configured signal.

3. The method according to claim 1, wherein: The transmission direction mode indicates one or more channel structures in the structure codebook set corresponding to the first time unit; and Each of the one or more channel structures covers one or more second time units within the predetermined duration and the transmission direction of the one or more second time units.

4. The method according to claim 3, wherein: The structure code set indicates the channel structure covering multiple second time units under a third waveform parameter set determined based on semi-static configuration, and The transmission direction within the predetermined duration is determined based on the alignment of the transmission direction under different waveform parameter sets within the predetermined duration.

5. A method executed by a first node, the method comprising: A first waveform parameter set and a predetermined duration are configured for use by a second node to determine the transmission direction of the transmission link on the BWP of a second bandwidth portion BWP set between the first and second nodes, wherein the transmission direction is determined based on a comparison result obtained by comparing the first waveform parameter set and the second waveform parameter set. Wherein, the predetermined duration represents the effective time range of the transmission direction, and the predetermined duration is determined based on an absolute time period independent of any set of waveform parameters. Wherein, the first waveform parameter set is related to the first BWP set, the second waveform parameter set is related to the second BWP set, and the second BWP set includes the first BWP set, and The second waveform parameter set is based on a semi-static configuration; Generate a wireless signal indicating the transmission direction pattern of multiple OFDM symbols of the transmission link between the first node and the second node, associated with the first waveform parameter set; and The wireless signal is sent to the second node.

6. The method according to claim 5, wherein, The transmission direction includes at least one field, the at least one field including: Downlink DL field, in which the second node is able to receive downlink signals; Uplink UL field, in which the second node is capable of sending uplink signals; or The OTHER field, in which the second node is able to receive a downlink signal or send an uplink signal accordingly after receiving a dynamic indication from the first node indicating that the OTHER field is updated to a DL field or a UL field, wherein each of the uplink signal and the downlink signal is a semi-statically configured signal.

7. The method according to claim 5, wherein: The transmission direction mode indicates one or more channel structures in the structure codebook set corresponding to the first time unit; and Each of the one or more channel structures covers one or more second time units within the predetermined duration and the transmission direction of the one or more second time units.

8. The method according to claim 7, wherein: The structure code set indicates the channel structure covering multiple second time units under a third waveform parameter set determined based on semi-static configuration, and The transmission direction within the predetermined duration is determined based on the alignment of the transmission direction under different waveform parameter sets within the predetermined duration.

9. A first communication device applied to a first node, comprising a processor, a memory, and a wireless interface, wherein the memory stores instructions that, when executed by the processor, cause the processor to perform the following operations: Receive wireless signals from the second node; Acquire the transmission direction pattern of multiple OFDM symbols of the transmission link between the first node and the second node, as indicated by the wireless signal; A first set of waveform parameters is determined for the transmission direction mode indicated by the wireless signal, wherein the first set of waveform parameters is associated with a first bandwidth portion (BWP) set; Receive semi-static configuration from the second node; A second waveform parameter set is determined based on the semi-static configuration, wherein the second waveform parameter set is related to a second BWP set, and the second BWP set includes the first BWP set. as well as Based on the transmission direction pattern, the transmission direction of the transmission link on the BWP of the second BWP set between the first node and the second node within a predetermined duration corresponding to the first waveform parameter set is determined, wherein the transmission direction is determined based on a comparison result obtained by comparing the first waveform parameter set and the second waveform parameter set, and wherein the predetermined duration represents the effective time range of the transmission direction and the predetermined duration is determined based on an absolute time period independent of any waveform parameter set.

10. The first communication device according to claim 9, wherein: The transmission direction mode indicates one or more channel structures in the structure codebook set corresponding to the first time unit; and Each of the one or more channel structures covers one or more second time units within the predetermined duration and the transmission direction of the one or more second time units.

11. The first communication device according to claim 10, wherein: The structure code set indicates the channel structure covering multiple second time units under a third waveform parameter set determined based on semi-static configuration, and The transmission direction within the predetermined duration is determined based on the alignment of the transmission direction under different waveform parameter sets within the predetermined duration.

12. The first communication device according to claim 9, wherein, The transmission direction includes at least one of the following: Downlink DL field, in which the first node is able to receive downlink signals; Uplink UL field, in which the first node is capable of sending uplink signals; or The OTHER field, in which the first node is able to receive a downlink signal or send an uplink signal accordingly after receiving a dynamic indication from the second node indicating that the OTHER field is updated to a DL field or a UL field, wherein each of the uplink signal and the downlink signal is a semi-statically configured signal.

13. A first communication device applied to a first node, comprising a processor, a memory, and a wireless interface, wherein the memory stores instructions that, when executed by the processor, cause the processor to perform the following operations: A first waveform parameter set and a predetermined duration are configured for use by a second node to determine the transmission direction of the transmission link on the BWP of a second bandwidth portion BWP set between the first and second nodes, wherein the transmission direction is determined based on a comparison result obtained by comparing the first waveform parameter set and the second waveform parameter set. in, The predetermined duration represents the effective time range of the transmission direction, and the predetermined duration is determined based on an absolute time period independent of any set of waveform parameters. Wherein, the first waveform parameter set is related to the first BWP set, the second waveform parameter set is related to the second BWP set, and the second BWP set includes the first BWP set, and The second waveform parameter set is based on a semi-static configuration; Generate a wireless signal indicating the transmission direction pattern of multiple OFDM symbols of the transmission link between the first node and the second node, associated with the first waveform parameter set; and The wireless signal is sent to the second node.

14. The first communication device according to claim 13, wherein: The transmission direction mode indicates one or more channel structures in the structure codebook set corresponding to the first time unit; and Each of the one or more channel structures covers one or more second time units within the predetermined duration and the transmission direction of the one or more second time units.

15. The first communication device according to claim 14, wherein: The structure code set indicates the channel structure covering multiple second time units under a third waveform parameter set determined based on semi-static configuration, and The transmission direction within the predetermined duration is determined based on the alignment of the transmission direction under different waveform parameter sets within the predetermined duration.

16. The first communication device according to claim 13, wherein, The transmission direction includes at least one field, the at least one field including: Downlink DL field, in which the second node is able to receive downlink signals; Uplink UL field, in which the second node is capable of sending uplink signals; or The OTHER field, in which the second node is able to receive a downlink signal or send an uplink signal accordingly after receiving a dynamic indication from the first node indicating that the OTHER field is updated to a DL field or a UL field, wherein each of the uplink signal and the downlink signal is a semi-statically configured signal.

17. A non-transitory computer-readable medium having stored thereon computer-executable instructions, which, when executed by a processor, cause the processor to perform the method of any one of claims 1-8.

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