Methods, devices and systems for signal and data transmission in wireless networks

Abstract

The present disclosure generally relates to a method, device, and system for signal and data transmission in a wireless network. A method performed by a wireless device is disclosed. The method may include: determining an initial format for each time block of a transmission resource pool that includes at least one subpool including a first subpool; and determining that a transmission resource segment in the first subpool is reconfigured from the initial format to an extended flexible format, where the initial format of the transmission resource segment is the same as the initial format of the first subpool, and the initial transmission direction of the transmission resource segment is the same as the initial transmission direction of the first subpool.

Description

[Technical field]

[0001] Technical Field The present disclosure relates generally to wireless communications, and more particularly, to methods, devices, and systems for signal and data transmission in wireless networks. [Background technology]

[0002] background Flexible and efficient wireless transmission resource scheduling is important in wireless communication networks. The ecosystem in wireless communication networks includes more and more applications that require low latency. These applications include vehicle-to-vehicle communication, autonomous driving, mobile gaming, etc. Specifically, when time division duplexing (TDD) is deployed in wireless networks, it is desirable to enable full-duplex data / signal transmission in specific slots and / or symbols to reduce transmission latency. A versatile scheme for efficient and dynamic transmission resource selection, configuration / reconfiguration, and scheduling is critical to accomplish this task. Summary of the Invention [Means for solving the problem]

[0003] overview The present disclosure relates to methods, devices, and systems for signal and data transmission, as well as transmission resource configuration and scheduling in wireless networks.

[0004] In some embodiments, a method performed by a wireless device is disclosed. The method may include: determining an initial format for each time block of a transmission resource pool comprising at least one subpool including a first subpool, the initial format indicating an initial transmission direction configuration for each time block, the initial format of each time block of the transmission resource pool comprising one of a downlink (DL) format, an uplink (UL) format, and a flexible format, the initial format of each time block in each of the at least one subpool is the same, the initial format of the first subpool is a DL format or a UL format, and the initial transmission direction of the first subpool is consistent with the initial format of the first subpool; and determining transmission resource segments in the first subpool to be reconfigured from the initial format to an extended flexible format, the initial format of the transmission resource segments being the same as the initial format of the first subpool, and the initial transmission direction of the transmission resource segments being the same as the initial transmission direction of the first subpool.

[0005] In some embodiments, a method performed by a network element is disclosed. The method may include: determining an initial format for each time block of a transmission resource pool comprising at least one subpool including a first subpool, the initial format indicating an initial transmission direction configuration for each time block, the initial format of each time block of the transmission resource pool comprising one of a downlink (DL) format, an uplink (UL) format, and a flexible format, the initial format of each time block in each of the at least one subpool is the same, the initial format of the first subpool is a DL format or a UL format, and the initial transmission direction of the first subpool is consistent with the initial format of the first subpool; and determining transmission resource segments in the first subpool to be reconfigured from the initial format to an extended flexible format, the initial format of the transmission resource segments being the same as the initial format of the first subpool, and the initial transmission direction of the transmission resource segments being the same as the initial transmission direction of the first subpool.

[0006] In some embodiments there is a network element or UE comprising a processor and a memory, the processor configured to read code from the memory and implement any method described in any of the embodiments.

[0007] In some embodiments, a computer program product comprises computer readable program medium code stored thereon, the code, when executed by a processor, causing the processor to implement any of the methods described in any of the embodiments.

[0008] The above embodiments, as well as other aspects and alternatives of their implementations, are described in more detail in the following drawings, description, and claims. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 illustrates an exemplary wireless communication network.

[0010] [Diagram 2] FIG. 2 illustrates an exemplary radio network node.

[0011] [Diagram 3] FIG. 3 illustrates an exemplary user equipment.

[0012] [Figure 4] FIG. 4 illustrates an example transmission resource pool and its pattern / format.

[0013] [Diagram 5] FIG. 5 shows an exemplary sub-band duplex implementation.

[0014] [Figure 6] 6-15 show example implementations for reconfiguring transmission resource segments. [Figure 7] 6-15 show example implementations for reconfiguring transmission resource segments. [Figure 8] 6-15 show example implementations for reconfiguring transmission resource segments. [Figure 9] 6-15 show example implementations for reconfiguring transmission resource segments. [Figure 10] 6-15 show example implementations for reconfiguring transmission resource segments. [Figure 11] 6-15 show example implementations for reconfiguring transmission resource segments. [Figure 12] 6-15 show example implementations for reconfiguring transmission resource segments. [Figure 13] 6-15 show example implementations for reconfiguring transmission resource segments. [Figure 14] 6-15 show example implementations for reconfiguring transmission resource segments. [Figure 15] 6-15 show example implementations for reconfiguring transmission resource segments. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Detailed Description Wireless communication network FIG. 1 illustrates an exemplary wireless communication network 100 including a core network 110 and a radio access network (RAN) 120. The core network 110 further includes at least one mobility management entity (MME) 112 and / or at least one access and mobility management function (AMF). Other functions that may be included in the core network 110 are not illustrated in FIG. 1. The RAN 120 further includes multiple base stations, e.g., base stations 122 and 124. The base stations may include at least one evolved node B (eNB) for 4G LTE, enhanced LTE eNB (ng-eNB), or next generation node B (gNB) for 5G New Radio (NR), or any other type of signal transmission and reception device, such as a UMTS node B. The eNB 122 communicates with the MME 112 via an S1 interface. Both the eNB 122 and the gNB 124 may connect to the AMF 114 via an Ng interface. Each base station manages and supports at least one cell. For example, base station gNB124 may be configured to manage and support cell 1, cell 2, and cell 3.

[0016] The gNB 124 may include a central unit (CU) and at least one distributed unit (DU). The CU and DU may be co-located or split into different locations. The CU and DU may be connected via an F1 interface. Alternatively, for eNBs that can connect to a 5G network, they may be similarly split into a CU and at least one DU, referred to as ng-eNB-CU and ng-eNB-DU, respectively. The ng-eNB-CU and ng-eNB-DU may be connected via a W1 interface.

[0017] The wireless communication network 100 may include one or more tracking areas. A tracking area may include a set of cells managed by at least one base station. For example, tracking area 1, labeled 140, may include cell 1, cell 2, and cell 3, and may further include more cells that may be managed by other base stations, not shown in FIG. 1. The wireless communication network 100 may also include at least one UE 160. The UE may select a cell from among multiple cells supported by the base station to communicate with the base station via an over-the-air (OTA) wireless communication interface and resources. And, as the UE 160 moves within the wireless communication network 100, it may reselect a cell for communication. For example, the UE 160 may initially select cell 1 to communicate with the base station 124, and then reselect cell 2 at some later point in time. The cell selection or reselection by the UE 160 may be based on wireless signal strength / quality in the various cells and other factors.

[0018] The wireless communication network 100 may be implemented as, for example, a 2G, 3G, 4G / LTE, or 5G cellular communication network. Correspondingly, the base stations 122 and 124 may be implemented as 2G base stations, 3G Node Bs, LTE eNBs, or 5G NR gNBs. The UE 160 may be implemented as a mobile or fixed communication device capable of accessing the wireless communication network 100. The UE 160 may include, but is not limited to, a mobile phone, a laptop computer, a tablet, a personal digital assistant, a wearable device, an Internet of Things (IoT) device, an MTC / eMTC device, a distributed remote sensor device, a roadside assistance device, an XR device, and a desktop computer. The UE 160 may also be generally referred to as a wireless communication device, or a wireless terminal. The UE 160 may support sidelink communication with other UEs via a PC5 interface.

[0019] Although the following description focuses on a cellular wireless communication system such as that shown in Figure 1, the underlying principles are applicable to other types of wireless communication systems for paging wireless devices. These other wireless systems may include, but are not limited to, Wi-Fi, Bluetooth, ZigBee, and WiMax networks.

[0020] 2 illustrates an example of an electronic device 200 for implementing a network base station (e.g., a radio access network node), a core network (CN), and / or an operation and maintenance (OAM). Optionally, in one implementation, the exemplary electronic device 200 may include radio transmit / receive (Tx / Rx) circuitry 208 for transmitting / receiving communications with UEs and / or other base stations. Optionally, in one implementation, the electronic device 200 may also include network interface circuitry 209 for allowing the base station to communicate with other base stations and / or a core network, e.g., optical or wired interconnects, Ethernet, and / or other data transmission media / protocols. The electronic device 200 may include an input / output (I / O) interface 206 for communicating with an operator, etc., as needed.

[0021] The electronic device 200 may also include system circuitry 204. The system circuitry 204 may include a processor 221 and / or a memory 222. The memory 222 may include an operating system 224, instructions 226, and parameters 228. The instructions 226 may configure one or more of the processors 221 to perform the functions of a network node. The parameters 228 may include parameters to support execution of the instructions 226. For example, the parameters may include network protocol settings, bandwidth parameters, radio frequency mapping assignments, and / or other parameters.

[0022] FIG. 3 illustrates an example of an electronic device implementing a terminal device 300 (e.g., user equipment (UE)). The UE 300 may be a mobile device, e.g., a smartphone or a mobile communication module located in a vehicle. The UE 300 may include some or all of the following: a communication interface 302, a system circuit 304, an input / output interface (I / O) 306, a display circuit 308, and a storage device 309. The display circuit may include a user interface 310. The system circuit 304 may include any combination of hardware, software, firmware, or other logic / circuitry. The system circuit 304 may be implemented, for example, using one or more system-on-chips (SoCs), application specific integrated circuits (ASICs), discrete analog and digital circuits, and other circuits. The system circuit 304 may be part of an implementation of any desired functionality in the UE 300. In that regard, the system circuitry 304 may include logic to facilitate, by way of example, the decoding and playback of music and video, e.g., MP3, MP4, MPEG, AVI, FLAC, AC3, or WAV, the execution of applications, the acceptance of user input, the storage and retrieval of application data, the establishment, maintenance, and termination of data connections, for example, for a cellular telephone call or an Internet connection, the establishment, maintenance, and termination of a wireless network connection, Bluetooth connection, or other connection, and the display of relevant information on a user interface 310. The user interface 310 and input / output (I / O) interface 306 may include a graphical user interface, a touch-sensitive display, haptic feedback or other tactile output, voice or facial recognition input, buttons, switches, speakers, and other user interface elements. Further examples of I / O interface 306 may include microphones, video and still image cameras, temperature sensors, vibration sensors, rotation and orientation sensors, headset and microphone input / output jacks, universal serial bus (USB) connectors, memory card slots, radiation sensors (e.g., IR sensors), and other types of inputs.

[0023] 3, the communication interface 302 may include radio frequency (RF) transmit (Tx) and receive (Rx) circuitry 316 that handles the transmission and reception of signals via one or more antennas 314. The communication interface 302 may include one or more transceivers. The transceivers may be wireless transceivers that include modulation / demodulation circuits, digital-to-analog converters (DACs), shaping tables, analog-to-digital converters (ADCs), filters, wave shapers, filters, preamplifiers, power amplifiers, and / or other logic for transmitting and receiving via one or more antennas or (for some devices) via a physical (e.g., wired) medium. The transmitted and received signals may conform to any of a diverse array of formats, protocols, modulations (e.g., QPSK, 16-QAM, 64-QAM, or 256-QAM), frequency channels, bit rates, and encodings. As one specific example, the communication interface 302 may include a transceiver supporting transmission and reception under 2G, 3G, BT, WiFi, Universal Mobile Telecommunications System (UMTS), High Speed ​​Packet Access (HSPA)+, 4G / Long Term Evolution (LTE), and 5G standards. However, the techniques described below are applicable to other wireless communication technologies, whether arising from the 3rd Generation Partnership Project (3GPP), GSM Association, 3GPP2, IEEE, or other partnerships or standards bodies.

[0024] 3, the system circuitry 304 may include one or more processors 321 and memory 322. The memory 322 stores, for example, an operating system 324, instructions 326, and parameters 328. The processor 321 is configured to execute the instructions 326 to perform desired functions for the UE 300. The parameters 328 may provide and specify configuration and operation options for the instructions 326. The memory 322 may also store any BT, WiFi, 3G, 4G, 5G, or other data that the UE 300 transmits or receives via the communication interface 302. In various implementations, system power for the UE 300 may be provided by a power storage device, such as a battery or a transformer.

[0025] Transmission resources in a wireless network In a wireless network, data and / or signals are transmitted using wireless transmission resources, which may be represented as a two-dimensional grid with time being one dimension and frequency being the other dimension.

[0026] Referring to FIG. 4 for a typical transmission resource configuration in a wireless network, such a network may be operated in a time division duplex (TDD) mode. In the time domain, the transmission resources may be organized by time blocks such as slots (or time slots), such as slot 0 to slot 4, as shown in FIG. 4. Based on the data / signal transmission direction, a slot may be assigned in the downlink (DL) direction, in which case the slot is dedicated to DL transmission / traffic. A slot may also be assigned in the uplink (UL) direction, in which case the slot is dedicated to UL transmission / traffic. A slot may also be configured as a flexible slot, in the sense that the slot may be flexibly configured to support both DL and UL traffic. Furthermore, a flexible slot may support both DL and UL transmissions simultaneously, or a flexible slot may support DL transmissions in one cycle and UL transmissions in another cycle. The direction assigned to a slot may be associated with the format of the slot. For example, DL format (or D format) slots may be dedicated to DL transmission, UL format (or U format) slots may be dedicated to UL transmission, and flexible format (or F format) slots may support bidirectional transmission.

[0027] The transmission resources may be periodic. Illustratively, as shown in FIG. 4, the transmission resources have a "DDDFU" pattern (D: DL slot, F: flexible slot, U: UL slot). The letters "D", "U", and "F" may each represent a format of the slot. In this example, this particular pattern has a periodicity of 2.5 milliseconds (ms). In this disclosure, the transmission resources in each cycle may be referred to as a transmission resource pool. For example, slot 0 to slot 5 form a transmission resource pool 402. In one implementation, consecutive slots assigned to the same format may form a transmission resource subpool (also referred to as a subpool for simplicity). As shown in FIG. 4, slot 0 to slot 2 are all assigned in the DL direction, and these three slots form subpool 1. Similarly, slot 3 itself forms subpool 2, which includes flexible transmission resources, and slot 4 itself forms subpool 3, which includes UL transmission resources. Although not shown in FIG. 4, a subpool may be formed by consecutive OFDM symbols assigned to the same format.

[0028] It should be noted that the aforementioned "DDDFU" pattern and its periodicity are merely exemplary. Other patterns and associated periodicities may be configured based on actual requirements. A pattern may be a combination of various numbers of slots in various formats. For example, a pattern may be "DDDDFUU". In this pattern, four DL slots, a single flexible slot, and two UL slots may each form a subpool for transmission resources.

[0029] In some embodiments, formats such as DL, UL, and flexible formats may also be applied to time blocks such as symbols. Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, or Filter Bank Multiple Access (FBMA) symbols may include at least one of:

[0030] Using OFDM symbols as an example, each slot may include multiple Orthogonal Frequency Division Multiplexing (OFDM) symbols. With reference to FIG. 4, a slot may include 14 OFDM symbols. In the frequency domain, each symbol may include multiple resource blocks (RBs). The number of RBs in each OFDM symbol may depend on, for example, the bandwidth of a cell or carrier.

[0031] In some embodiments, one or more OFDM symbols may form a transmission resource segment (or resource segment). As shown in FIG. 4, a resource segment 404 is formed by OFDM symbols 2-11 in a slot. A resource segment may also be formed by one or more slots or a mix of slots and OFDM symbols. For example, in a transmission resource pool formed by slots 0-4, slots 1 and 2 may form a resource segment. In some embodiments, one or more OFDM symbols or one or more slots forming a transmission resource segment are of the same format.

[0032] In some embodiments, a transmission subpool may be formed by multiple slots or OFDM symbols and have a transmission direction and format that are the same as the transmission direction and format of the member slots or OFDM symbols in the subpool. This also applies to the transmission resource segment. In summary, each time block (e.g., slot / symbol) may have a format (D, U, or F) and a transmission direction (DL, UL, or bidirectional) that may be used to determine the corresponding format or transmission direction of the subpool or transmission resource segment. Furthermore, within each time block, a frequency range (e.g., subband, resource block, etc.) may also be assigned a format. For example, resource blocks 10-20 of slot 1 may be assigned to the D format, and another resource block 70-80 of slot 1 may be assigned to the U format. In the exemplary embodiments of the present disclosure, the description may be given using slots / symbols, and the basic principles apply to time blocks in general.

[0033] Sub-band full duplex (SBFD) As mentioned above, in an exemplary wireless network operating in TDD mode, data / signal transmissions may follow a particular pattern, such as "DDDFU". The following description is based on this pattern, but it will be understood that the transmissions may follow various other patterns. The description uses slots for illustrative purposes, and other time blocks may apply as well. In the "DDDFU" pattern, slots 0-2 are DL slots, slot 3 is a flexible slot, and slot 4 is a UL slot. Thus, the resulting DL and UL traffic is time division duplexed according to the transmission slot pattern. It is an overstatement that UL transmissions have only a single dedicated slot. From a network performance perspective, UL transmissions may suffer from excessive latency since the UE is limited to transmitting in the UL resources assigned to the single dedicated U slot and flexible slot. This may lead to performance issues, especially for latency sensitive applications such as intelligent transportation systems, vehicle-to-vehicle communications, and remote surgery. Another factor to consider is that the transmission energy for UL communication is constrained to the dedicated U slot, which may lead to suboptimal or degraded radio coverage.

[0034] To address the aforementioned issues regarding latency and transmission energy limitations, one solution is to introduce a sub-band full duplex (SBFD) mode into the wireless network. With reference to FIG. 5, slots 1-2, originally dedicated to DL transmission, may be allocated to create a UL sub-band (UL SB502) where a portion of the spectrum resources in slots 1-2 are to support UL transmission, while the remaining spectrum resources may be reconfigured to still support DL transmission. Thus, simultaneous DL and UL transmissions may be achieved in slots 1-2. Similarly, slot 4, originally dedicated to UL transmission, may be reconfigured and a portion of the spectrum resources (DL SB504) may be allocated to support DL transmission. In this example, slot 0 remains in its original format (D) and is still dedicated to DL transmission. In some embodiments, sub-bands such as UL SB502 and DL SB504 may be formed by one or more resource blocks.

[0035] By adding the SBFD mode, the wireless network may obtain a certain level of flexibility to schedule transmissions in one direction using sub-bands in a slot (or slots) originally dedicated to another direction. However, scheduling of reverse traffic (compared to the direction originally assigned to the slot) is restricted to the assigned sub-bands. Thus, scheduling schemes such as dynamic scheduling (e.g., via downlink control information (DCI)), configuration scheduling (CG), and semi-persistent scheduling (SPS) may all need to follow this rule. This restriction may also cause spectrum efficiency issues. For example, for a D slot (originally dedicated to DL transmissions) with a sub-band assigned to UL traffic, if there is no UL traffic that needs to be scheduled in the sub-band but there is a DL transmission task that could benefit from additional bandwidth, the sub-band may nevertheless not be assigned to DL transmission unless the whole or part of the sub-band is claimed back to the associated slot (e.g., via additional configuration signaling). In another example, for a D slot with a sub-band assigned to UL traffic, there is less DL traffic and there are unused DL resources in the slot. If the UL traffic can benefit from the additional bandwidth, the unused DL resources may not be allocated to the UL transmission.

[0036] Another potential issue with SBFD is the overall system complexity. This has to do with the signaling overhead involved to configure subbands, since the base station needs to indicate to the UE about the subband configuration. Furthermore, complex operating rules must be defined to standardize the behavior of the UE and / or base station related to the subbands. For example, existing scheduling schemes such as dynamic scheduling, CG, and SPS need to be modified to accommodate subbands.

[0037] In the present disclosure, various embodiments are disclosed that aim to increase the flexibility of transmission resource scheduling while leveraging existing resource scheduling schemes and minimizing signaling overhead.

[0038] Frame structure and slot format configuration In a wireless network, various signaling and / or messages may be provided to configure the time block (e.g., frame, slot, symbol, etc.) format that includes the pattern of the transmission resource pool, as described in the previous section (e.g., the “DDDFU” pattern shown in FIG. 4).

[0039] The signaling may include cell-specific signaling, such as tdd-UL-DL-ConfigurationCommon, which applies to all UEs in one cell. Returning to FIG. 4, this signaling may indicate to the UE the periodicity of the transmission resource pool, the format of each slot in the transmission resource pool (i.e., D, U, or F).

[0040] The indications / configurations mentioned above use slots as units in the time domain. In some embodiments, to obtain finer granularity, the same basic principle may be applied to the OFDM symbol level. For example, the periodicity may be presented as a number of OFDM symbols (or an equivalent period corresponding to a number of OFDM symbols). Similarly, this format may be applied to OFDM symbols as well. That is, the base station may indicate to the UE the format per OFDM symbol, whether the symbol is for DL, UL, or flexible purposes.

[0041] The signaling may also include UE-specific signaling, such as tdd-UL-DL-ConfigurationDedicated. In some embodiments, the UE-specific signaling may override the configuration indicated by the cell-specific signaling.

[0042] In some embodiments, if the UE is not provided with either cell-specific or UE-specific signaling, the UE may assume that all slots and / or OFDM symbols are in the flexible format.

[0043] Once a slot (or multiple slots) or OFDM symbol (or multiple OFDM symbols) is configured as a flexible format, the base station may schedule transmission resources in the slot or OFDM symbol having the desired direction, whether the direction is DL or UL. For example, referring to FIG. 4, slot 3 is configured as an F slot. In the time domain, the base station may allocate the entire slot or at least one OFDM symbol in this slot for UL transmission. In the frequency domain, the resource allocation may occupy all resource blocks in the entire slot (or at least one OFDM symbol), or only a portion of them. For example, assuming there is a single carrier in the frequency domain that contains 100 resource blocks, in one example of allocation, resource blocks 11-20 of these 100 resource blocks in the entire slot 3 may be allocated for UL transmission. In another allocation, resource blocks 50-80 of these 100 resource blocks in OFDM symbols 8-10 of slot 3 may be allocated for UL transmission.

[0044] By using the above-mentioned signaling, the transmission resources can be configured with an initial configuration including an initial pattern. Still referring to FIG. 4, the transmission resource pool 402 can be configured with an initial pattern "DDDFU" using the above-mentioned signaling scheme.

[0045] In some implementations, the transmission resources may be restricted to a single cell or a single carrier.

[0046] Reformatting Sending Resources After the transmission resource pool is configured with an initial pattern, each time block (e.g., slot, symbol, etc.) in the transmission resource pool is assigned to an initial format, such as D (for DL ​​direction), F (flexible for both DL and UL directions), or U (for UL direction). The initial format may be reconfigured to a different format, for example, by the base station. In some embodiments, based on information such as traffic characteristics, quality of service (QoS) requirements, service type, etc., the base station may send a message to the UE to reformat at least one slot or at least one symbol in the transmission resource pool. Returning to FIG. 4, the initial format of slot 1 is DL (D). In the present disclosure, without affecting other slots, the base station may reformat slot 1 to an extended flexible slot format, which may support both DL and UL transmissions to be flexible, and may indicate the updated format of slot 1 to the UE.

[0047] In this disclosure, the extended flexible format may further include various extensions to the flexible format, the extensions including at least: The extended flexible format provides transmission direction collision resolution when both DL and UL transmissions are scheduled in the same time block. Extended flexible formats inherit the default format from the initial format of the associated transmission resource, extended, and Extended Flexible Format provides flexible Bandwidth Part (BWP) configuration, Includes.

[0048] Further discussion of these extensions is provided in later sections.

[0049] In some embodiments, in addition to using signals / messages to explicitly reformat slots and / or OFDM symbols, some predefined rules may be used. For example, if certain preconditions are met, such as UL / DL traffic above a threshold, the format of at least one slot / OFDM symbol may be changed to the extended flexible format. Furthermore, a selection mechanism may be defined under these rules to select the slots and / or symbols that are intended to be reformatted. These predefined rules may be coordinated and agreed upon between the base station and the UE.

[0050] In summary, in this disclosure, a two-step procedure is introduced to first initialize the format of the transmission resource pool, and then specific slots and / or OFDM symbols may be reformatted to the extended flexible format.

[0051] Step 1: The base station may send a first signaling to the UE to initialize a format of the transmission resource pool. The first signaling may include a cell-specific message or a UE-specific message.

[0052] Step 2: The format of specific slots and / or OFDM symbols within the transmission resource pool may be reconfigured via second signaling or by predefined rules.

[0053] In the following embodiments, unless otherwise stated, a transmission resource pool including 5 slots (used as an example time block) and configured by an initial "DDDFU" pattern is used. For example, the base station may configure the pattern via cell-specific and / or UE-specific signaling as described above. Other parameters such as periodicity may also be configured. Note that this particular pattern is for illustrative purposes only. The same basic principles may apply to other patterns. Furthermore, the pattern may be applied to multiple slots and multiple OFDM symbols. That is, if a "DDDFU" pattern applies to a slot, there are 5 slots that follow this pattern. If "DDDFU" applies to an OFDM symbol, there are 5 OFDM symbols that follow this pattern.

[0054] EMBODIMENT 1 6, slots 1-2 forming a transmission resource segment 602 in a subpool 604 are initially configured to be in "D" format. These two slots are then reformatted to the extended flexible format.

[0055] In one implementation, if a transmission resource subpool is formed by resources (e.g., slots, OFDM symbols) in the "D" format, the transmission resource segment (within the subpool) to be reformatted must start from the last OFDM symbol or last slot of the subpool. For example, in FIG. 6, slots 0-2 form a "D" format subpool 604, and reformatting a portion of the subpool may require starting from slot 2, or the last OFDM symbol of slot 2. In another example, if only 8 OFDM symbols need to be reformatted to the flexible format, the last 8 OFDM symbols in the subpool, which are the last 8 symbols of slot 2, are selected for reformatting.

[0056] Illustratively, there is one physical downlink control channel (PDCCH) in slot 0, which schedules a physical downlink shared channel (PDSCH) for the UE in slot 1. The UE receives the PDSCH in slot 1.

[0057] Illustratively, there is another PDCCH in slot 0, which schedules a physical uplink shared channel (PUSCH) for the UE in slot 2. The UE receives the PUSCH in slot 2. In this case, the scheduled PUSCH has a different transmission direction compared to the original transmission direction in slot 2. In one implementation, the remaining resources in slot 2 may still be available for DL ​​transmission.

[0058] EMBODIMENT 2 7, the transmission resource segment 702 in subpool 704 (slot 4) is initially configured to be in the "U" format. Slot 4 is then reformatted to the extended flexible format. Note that a transmission resource segment may occupy all or a portion of a subpool (i.e., a transmission resource segment is a subset of a subpool, and a subset may be some or all of its parent set). In this example, the transmission resource segment 702 occupies the entire subpool 704.

[0059] In one implementation, if a transmission resource subpool is formed by resources (e.g., slots, OFDM symbols) in the "U" format, the transmission resource segment (within the subpool) to be reformatted must start from the first OFDM symbol or the first slot in the subpool. For example, in FIG. 7, slot 4 forms a subpool in the "U" format. If only eight OFDM symbols in the subpool need to be reformatted to the flexible format, the first eight OFDM symbols in the subpool, which are the first eight symbols of slot 4, are selected for reformatting. In another example, not shown in FIG. 7, assuming that slots n and (n+1) form a subpool in the "U" format, if one slot in the subpool needs to be reformatted to the extended flexible format, slot n is selected for reformatting.

[0060] Illustratively, there is one PDCCH in slot 2 and a PDSCH is scheduled in slot 4. The UE receives the PDSCH in slot 4.

[0061] EMBODIMENT 3 Referring to FIG. 8, slots 1-2 are initially configured to be in "D" format and then reconfigured to the extended flexible format.

[0062] The UE may receive a scheduled data channel via the SPS. For example, as shown in FIG. 8, there is an SPS-PDSCH opportunity in slot 1. The UE receives the SPS-PDSCH in slot 1.

[0063] Illustratively, there is a PDCCH search space configured in slot 2. The UE may perform blind decoding of the PDCCH in the search space. The UE may detect the PDCCH transmitted in the search space, which schedules the PUSCH in slot 4. The UE may transmit the PUSCH in slot 4.

[0064] EMBODIMENT 4 9, slots 0-2 forming transmission resource subpool 902 are initially configured to be in "D" format. Slot 4 forming transmission resource subpool 904 is initially configured to be in "U" format.

[0065] Similar to embodiment 1, when a transmission resource subpool is formed by resources in the "D" format, the transmission resource segments (in the subpool) to be reformatted should be counted from the last OFDM symbol or the last slot of the subpool. As an example, in FIG. 9, subpool 902, transmission resource segment 906 having 25 OFDM symbols, needs to be reformatted to flexible format. The last 11 symbols in subpool 902, the last 25 symbols in slot 1 and all symbols in slot 2 are selected as the transmission resource segments to be reconfigured.

[0066] If a transmission resource subpool is formed by resources in the "U" format, the transmission resource segment (in the subpool) to be reformatted should be counted from the first OFDM symbol or the first slot in the subpool. As an example, in FIG. 9, in subpool 904, transmission resource segment 908 having 12 OFDM symbols needs to be reformatted to the extended flexible format. The first 12 symbols of slot 4, which are also the first 12 symbols of subpool 904, are selected as the transmission resource segment to be reconfigured.

[0067] After reformatting as described above, there is an SPS-PDSCH opportunity in slot 4 and the UE receives the SPS-PDSCH in slot 4. Note that slot 4 was originally configured as "U" format. After reformatting, slot 4 also supports DL transmission.

[0068] There is a CG-PUSCH opportunity in slot 2, and the UE transmits CG-PUSCH in slot 2. Note that slot 2 was originally configured as "D" format. After reformatting, slot 2 also supports UL transmission.

[0069] EMBODIMENT 5 10, slots 0-2 forming transmission resource subpool 1002 are initially configured to be in "D" format. Slots 1 and 2 forming transmission resource segment 1004 are reconfigured to flexible format, which is the last 28 OFDM symbols of subpool 1002 (i.e., the last two slots).

[0070] In one implementation, when a transmission resource segment is reconfigured to the extended flexible format, the serving direction (DL or UL) of the transmission resource segment (and any subsets therein) may be considered uncertain and further signaling / message from the base station is required to indicate the serving direction. For example, as shown in FIG. 10, two PDCCHs in slot 0 are used to indicate the direction of two resource subsets of the transmission resource segment 1004. The first PDCCH indicates that the five symbols in slot 1 (resource subset 1006) serve the UL, and the second PDCCH indicates that the five symbols in slot 2 (resource subset 1008) serve the DL. In this disclosure, the transmission resource subsets in a transmission resource segment may be less than or equal to the transmission resource segment.

[0071] In one implementation, when a transmission resource segment is reconfigured to the extended flexible format, the serving direction (DL or UL) of the transmission resource segment may inherit the direction defined by the original format of the transmission resource segment. That is, if no further signaling / messaging indicating the serving direction is sent by the base station (to override the original format), the serving direction of the transmission resource segment defaults to the direction defined by the original format of the transmission resource segment. This default serving direction may be overridden by further signaling / messaging from the base station when a transmission in the reverse direction is expected. As an example, referring to FIG. 10, slot 4 is originally configured as a "U" format and is reconfigured to the extended flexible format. Without further signaling / messaging from the base station, the transmission resource segment 1010 (and any transmission resource subsets therein) defaults to the UL direction. Signaling / messaging is only needed to override the default UL direction if the segment 1010 (or a subset thereof) is used for DL ​​transmission or needs to be reformatted to the DL format. In this embodiment, when resources are reformatted to the extended flexible format, a subset therein may be assigned to either DL or UL format. For example, a subset may be periodic and set to DL format, and the UE is expected to periodically turn on its hardware circuitry for DL ​​reception in this subset. For another example, a DL transmission such as PDSCH may be scheduled in the subset for one-shot DL transmission.

[0072] EMBODIMENT 6 11, a transmission resource pool 1102 is formed by slots 0 to 4. Within this transmission resource pool 1102, some resources need to be reconfigured to an extended flexible format, and certain rules need to be followed for the selection of the reconfigured resources.

[0073] As a general rule, if a particular resource Cell-specific configuration, ·Semi-static configuration, Periodic configuration, or - Data or signals with high priority If the resource is scheduled to one of the extended flexible formats, the resource cannot be reformatted to the extended flexible format.

[0074] For example, in FIG. 11, subpool 1104 (slots 0-2) and subpool 1106 (slot 4) are two candidate subpools from which resources to be reconfigured may be selected. In subpool 1104, there are two synchronization signal blocks (SSBs) scheduled in slot 0. According to the selection rule, if an SSB is scheduled in a slot, this slot may not be selected as a resource to be reconfigured. In subpool 1106, there is a physical random access channel (PRACH) scheduled in slot 4. Slot 4 may not be selected as a resource to be reconfigured. Therefore, only slots 1-2 in subpool 1104 may be selected and reconfigured to the extended flexible format.

[0075] EMBODIMENT 7 12, in this embodiment, slots 1-2 are reconfigured to an extended flexible format that includes the last 28 OFDM symbols (i.e., the last two slots) in the transmission resource subpool 1202. Slot 4 is reconfigured to an extended flexible format that includes the first 14 OFDM symbols in the transmission resource subpool 1204.

[0076] In one example, there is a PDSCH (e.g., SPS-PDSCH, or dynamically scheduled PDSCH) and a PUSCH (e.g., CG-PUSCH, or dynamically scheduled PUSCH) in slot 1. That is, there are both DL and UL transmissions scheduled in slot 1. Thus, there is a contention for the transmission direction. Since slot 1 was originally configured as "D" format for the DL direction, the PDSCH is considered to have a higher priority than the PUSCH. In this case, the UE drops the UL transmission and receives the DL transmission. That is, the transmission direction that matches the original format (before reformatting) is preferred.

[0077] In another example, there is a PDSCH (e.g., SPS-PDSCH, or dynamically scheduled PDSCH) and an SRS in slot 4. Since slot 4 was originally configured as "U" format for the UL direction, the SRS is considered to have a higher priority than the PDSCH. In this case, the UE drops the reception of the DL transmission and continues with the UL transmission. That is, the transmission direction that matches the original format of the slot is prioritized.

[0078] EMBODIMENT 8 13, in this embodiment, slots 1-2 are reconfigured to an extended flexible format that includes the last 28 OFDM symbols (i.e., the last two slots) in the transmission resource subpool 1302. Slot 4 is reconfigured to an extended flexible format that includes the first 14 OFDM symbols in the transmission resource subpool 1304.

[0079] In slot 1, there is a PDSCH (e.g., SPS-PDSCH, or dynamically scheduled PDSCH), a PUSCH (e.g., CG-PUSCH, or dynamically scheduled PUSCH), and an SRS. It is observed that there are more UL signals / channels (i.e., PUSCH and SRS) in slot 1 than DL signals / channels (i.e., PDSCH). In this case, UL transmission is considered to have a higher priority than DL reception due to its higher occurrence. In this case, the UE drops the reception of the DL transmission and continues with the UL transmission.

[0080] EMBODIMENT 9 14, in this embodiment, slots 1-2 are reconfigured to an extended flexible format that includes the last 28 OFDM symbols (i.e., the last two slots) in the transmission resource subpool 1402. Slot 4 remains in the original "U" format (for UL).

[0081] There is an uplink bandwidth portion (BWP) 1404 configured in slots 1-2. There is another uplink BWP 1406 configured in slot 4. In this embodiment, an uplink BWP in a reconfigured transmission resource segment shares the same BWP configuration as another uplink BWP in another transmission resource segment, which is in its original format (not reformatted). For example, uplink BWP 1404 may reside in a reconfigured transmission resource segment formed by slots 1-2 and share the same BWP configuration as uplink BWP 1406, which resides in a transmission resource segment formed by slot 4 and is in its original "U" format.

[0082] Similarly, a downlink BWP in a reconfigured transmission resource segment shares the same BWP configuration as another downlink BWP in another transmission resource segment, which is in its original “D” (for DL) format.

[0083] In some implementations, the BWP configuration includes: Bandwidth, ·Center frequency, A control channel configuration, the control channel comprising at least one of a physical uplink control channel (PUCCH) or a physical downlink control channel (PDCCH); A data channel configuration, the data channel comprising at least one of a physical uplink shared channel (PUSCH) or a physical downlink shared channel (PDSCH); or Numerology Includes at least one of the following:

[0084] The configuration of the control channel includes at least one of a search space configuration or a control resource set (CORESET) configuration.

[0085] In some implementations, the BWPs described above are active BWPs.

[0086] In this embodiment, the UE may copy the BWP configuration for the BWP in the reconfigured transmission resource segment directly from the existing BWP without requiring further signaling from the base station.

[0087] EMBODIMENT 10 This is the opposite of embodiment 9. Referring to Fig. 15, in this embodiment, slots 1-2 are reconfigured to the extended flexible format including the last 28 OFDM symbols (i.e., the last two slots) in the transmission resource subpool 1402. Slot 4 remains in the original "U" format (for UL).

[0088] There is an uplink bandwidth portion (BWP) 1504 configured in slots 1-2. There is another uplink BWP 1506 configured in slot 4. In this embodiment, an uplink BWP in a reconfigured transmission resource segment has a different BWP configuration compared to another uplink BWP in another transmission resource segment, the other transmission resource segment being in its original format. For example, uplink BWP 1504 exists in the reconfigured transmission resource segment formed by slots 1-2 and has a different BWP configuration than uplink BWP 1506 exists in the transmission resource segment formed by slot 4 and is in its original "U" format.

[0089] Similarly, a downlink BWP in a reconfigured transmission resource segment has a different BWP configuration compared to another downlink BWP in another transmission resource segment, which is in its original “D” (for DL) format.

[0090] The BWP configuration is described in embodiment 9, and details are omitted here.

[0091] In the above embodiments, the transmission resources may be restricted to a single cell or a single carrier.

[0092] The above description and the accompanying drawings provide specific exemplary embodiments and implementations. However, the described subject matter may be embodied in various different forms, and therefore, it is intended that the subject matter encompassed or claimed be construed as not being limited to any exemplary embodiment described herein. A reasonably broad scope of the subject matter claimed or encompassed is intended. Among other things, for example, the subject matter may be embodied as a method, device, component, system, or non-transitory computer-readable medium for storing computer code. Thus, the embodiments may take the form of, for example, hardware, software, firmware, storage medium, or any combination thereof. For example, the method embodiments described above may be implemented by a component, device, or system including a memory and a processor by executing computer code stored in the memory.

[0093] Throughout this specification and the claims, terms may have subtle meanings that are suggested or implied in the context beyond the meaning explicitly stated. Similarly, the phrase "in one embodiment / implementation" as used herein does not necessarily refer to the same embodiment, and the phrase "in another embodiment / implementation" as used herein does not necessarily refer to a different embodiment. For example, the claimed subject matter is intended to include combinations of the example embodiments in whole or in part.

[0094] Generally, terms may be understood at least in part from their use in context. For example, terms such as "and," "or," or "and / or" as used herein may include various meanings that may depend at least in part on the context in which such terms are used. Typically, "or" when used to relate a list such as A, B, or C is intended to mean A, B, and C, which are used herein in an inclusive sense, as well as A, B, or C, which are used herein in an exclusive sense. Furthermore, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending at least in part on the context. Similarly, terms such as "a," "an," or "the" may be understood to convey a singular usage or to convey a plural usage, depending at least in part on the context. Furthermore, the term "based on" may be understood not to be intended to convey a necessarily exclusive set of factors, but instead may allow for the existence of additional factors not necessarily explicitly described, depending at least in part on the context.

[0095] References to features, advantages, or similar language throughout this specification do not imply that all of the features and advantages that may be realized by the solution should or are included in any single implementation thereof. Rather, language referring to features and advantages is understood to mean that the particular feature, advantage, or characteristic described in connection with an embodiment is included in at least one embodiment of the solution. Thus, descriptions of features and advantages throughout this specification, and similar language, may, but do not necessarily, refer to the same embodiment.

[0096] Furthermore, the described features, advantages, and characteristics of the solution may be combined in any suitable manner in one or more embodiments. Those skilled in the art will recognize in light of the description herein that the solution may be practiced without one or more of the specific features or advantages of a particular embodiment. In other instances, additional features and advantages may be recognized in certain embodiments that may not be present in all embodiments of the solution.

Claims

1. 1. A method for wireless communication performed by a wireless device, the method comprising: determining an initial format for each time block of a transmission resource pool comprising at least one subpool including a first subpool, the initial format indicating an initial transmission direction configuration for each time block; the initial format of each time block of the transmission resource pool comprises one of a downlink (DL) format, an uplink (UL) format, and a flexible format; an initial format of each time block in each of the at least one subpool is the same; The initial format of the first subpool is the DL format or the UL format; an initial transmission direction of the first subpool matches the initial format of the first subpool; and determining that transmission resource segments in the first subpool are to be reconfigured from an initial format to an extended flexible format, wherein the initial format of the transmission resource segments is the same as the initial format of the first subpool and an initial transmission direction of the transmission resource segments is the same as an initial transmission direction of the first subpool; A method comprising:

2. the DL format indicates that an associated transmission resource is dedicated for DL ​​transmissions; the UL format indicates that the associated transmission resource is dedicated for UL transmissions; the flexible format indicates that the associated transmission resource is capable of both DL and UL transmissions; The extended flexible format is a an extension, wherein the extended flexible format provides transmission direction collision resolution when both DL and UL transmissions are scheduled in the same time block; an extension, where the extended flexible format inherits a default format from an initial format of the associated transmission resource; The extended flexible format provides flexible bandwidth portion (BWP) configuration. The method of claim 1 , comprising at least one of:

3. The unit for each time block of the transmission resource pool is time slot, or symbol The method of claim 1 , comprising at least one of:

4. The method of claim 1 , wherein the transmission resource pool is configured to repeat periodically in the time domain.

5. The method of claim 1 , wherein any two adjacent subpools in the at least one subpool have different initial formats.

6. The method of claim 1 , wherein the transmission resource segment comprises n symbols, the n symbols being contiguous in the time domain.

7. The types of the n symbols are: Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, or Filter Bank Multiple Access (FBMA) Symbols The method of claim 6 , comprising at least one of:

8. in response to the initial format of the first subpool being the DL format, the n symbols are the last n symbols in the first subpool; 7. The method of claim 6, wherein in response to the initial format of the first subpool being the UL format, the n symbols are the first n symbols in the first subpool.

9. determining the initial format for each time block of the transmission resource pool; Receiving a first message from a network element; determining the initial format for each time block of the transmission resource pool based on the first message; The method of claim 1 , comprising:

10. The network element, Next Generation Node B (gNB), Enhanced LTE eNB (ng-eNB), or Evolved Node B (eNB) The method of claim 9 , comprising at least one of:

11. The first message comprises: tdd-UL-DL-ConfigurationCommon message, or tdd-UL-DL-ConfigurationDedicated Message The method of claim 9 , comprising at least one of:

12. determining that the transmission resource segments are to be reconfigured from the initial format to the extended flexible format; receiving a second message from the network element; determining, based on the second message, that the transmission resource segment is to be reconfigured from the initial format to the extended flexible format; The method of claim 1 , comprising:

13. determining that the transmission resource segments are to be reconfigured from the initial format to the extended flexible format; The method of claim 1 , comprising determining that the transmission resource segments are to be reconfigured from the initial format to the extended flexible format based on a predefined rule.

14. receiving an indication from the network element; The instructions are: a subset of the transmission resource segments; and a format of the subset of the transmission resource segments comprising one of a DL format, or a UL format; or a transmission scheduled for the subset of the transmission resource segments comprising one of a DL transmission or an UL transmission; and at least one of:

15. The instructions are: time domain information of the subset of the transmission resource segments; or Frequency domain information for the subset of the transmission resource segments. The method of claim 14 , further comprising at least one of:

16. The instructions are: A dynamic scheduling message comprising a downlink control information (DCI) message; Semi-static configuration messages, DL Semi-Persistent Scheduling (SPS) scheduling message, or UL Configuration Grant (CG) Scheduling Message The method of claim 14 comprising at least one of:

17. 2. The method of claim 1, further comprising: in response to receiving an indication from a network element indicating that a subset of the transmission resource segments in the time and frequency domains are to be scheduled for a transmission, the scheduled transmission comprising a DL transmission or an UL transmission, and a direction of the scheduled transmission being different from the initial transmission direction of the first subpool, performing a transmission task or a reception task using the subset of the transmission resource segments in a direction consistent with the direction of the scheduled transmission.

18. 2. The method of claim 1, further comprising: in response to not receiving an indication that the subset of transmission resource segments is scheduled with UL or DL ​​transmission or configured in DL or UL format, determining that a transmission direction associated with the subset is in accordance with the initial transmission direction of the first subpool.

19. determining that the transmission resource segments in the first subpool are to be reconfigured from the initial format to the extended flexible format; The transmission resource segment comprises: Cell-specific configuration, quasi-static configuration, Periodic configuration, or High priority data or signals determining that one of the resources does not overlap with the allocated resources; determining that the transmission resource segments in the first subpool are to be reconfigured from the initial format to the extended flexible format; The method of claim 1 , comprising:

20. determining that there is at least one DL transmission and at least one UL transmission scheduled in a same time block located within the transmission resource segment; in response to the initial transmission direction of the transmission resource segment being DL, dropping the at least one scheduled UL transmission and receiving the at least one DL transmission; in response to the initial transmission direction of the transmission resource segment being UL, dropping the at least one scheduled DL transmission and transmitting the at least one UL transmission; The method of claim 1 further comprising:

21. determining that there are j DL transmissions and k UL transmissions scheduled in a same OFDM symbol located within the transmission resource segment, where j and k are positive integers; in response to j being greater than k, dropping the k UL transmissions and receiving the j DL transmissions; in response to j being less than k, dropping the j DL transmissions and transmitting the k UL transmissions. The method of claim 1 further comprising:

22. the transmission resource segment comprises a first BWP of a DL or an UL; The method further includes determining that a BWP configuration of the first BWP is the same as a second BWP in a second subpool of the at least one subpool, the second subpool having an initial direction that is the same as a direction associated with the first BWP, and the BWP configuration is: Bandwidth, center frequency, a control channel configuration, the control channel comprising at least one of a physical uplink control channel (PUCCH) or a physical downlink control channel (PDCCH); A data channel configuration, the data channel comprising at least one of a Physical Uplink Shared Channel (PUSCH) or a Physical Downlink Shared Channel (PDSCH); or Numerology The method of claim 1 , comprising at least one of:

23. The configuration of the control channel: Search space configuration, or Control Resource Set (CORESET) Configuration 23. The method of claim 22, comprising at least one of:

24. the transmission resource segment comprises a first BWP for DL ​​or UL; 2. The method of claim 1, further comprising determining that a BWP configuration of the first BWP is different from a second BWP in a second subpool of the at least one subpool, the second subpool having an initial direction that is the same as a direction associated with the first BWP.

25. 1. A method for wireless communication conducted by a network element, comprising: determining an initial format for each time block of a transmission resource pool comprising at least one subpool including a first subpool, the initial format indicating an initial transmission direction configuration for each time block; the initial format of each time block of the transmission resource pool comprises one of a downlink (DL) format, an uplink (UL) format, and a flexible format; an initial format of each time block in each of the at least one subpool is the same; The initial format of the first subpool is the DL format or the UL format; an initial transmission direction of the first subpool matches the initial format of the first subpool; and determining that transmission resource segments in the first subpool are to be reconfigured from an initial format to an extended flexible format, wherein the initial format of the transmission resource segments is the same as the initial format of the first subpool and an initial transmission direction of the transmission resource segments is the same as an initial transmission direction of the first subpool; A method comprising:

26. the DL format indicates that an associated transmission resource is dedicated for DL ​​transmissions; the UL format indicates that the associated transmission resource is dedicated for UL transmissions; the flexible format indicates that the associated transmission resource is capable of both DL and UL transmissions; The extended flexible format is a an extension, wherein the extended flexible format provides transmission direction collision resolution when both DL and UL transmissions are scheduled in the same time block; an extension, where the extended flexible format inherits a default format from an initial format of the associated transmission resource; The extended flexible format provides flexible bandwidth portion (BWP) configuration.

26. The method of claim 25, comprising at least one of:

27. The unit for each time block of the transmission resource pool is time slot, or symbol 26. The method of claim 25, comprising at least one of:

28. 26. The method of claim 25, wherein the transmission resource pool is configured to repeat periodically in the time domain.

29. 26. The method of claim 25, wherein any two adjacent subpools in the at least one subpool have different initial formats.

30. 26. The method of claim 25, wherein the transmission resource segment comprises n symbols, the n symbols being contiguous in the time domain.

31. The types of the n symbols are: Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, or Filter Bank Multiple Access (FBMA) Symbols 31. The method of claim 30, comprising at least one of:

32. in response to the initial format of the first subpool being the DL format, the n symbols are the last n symbols in the first subpool; 31. The method of claim 30, wherein in response to the initial format of the first subpool being the UL format, the n symbols are the first n symbols in the first subpool.

33. 26. The method of claim 25, further comprising: transmitting, to a user equipment (UE), a first message indicating the initial format for each time block of the transmission resource pool.

34. The network element, Next Generation Node B (gNB), Enhanced LTE eNB (ng-eNB), or Evolved Node B (eNB) 34. The method of claim 33, comprising at least one of:

35. The first message comprises: tdd-UL-DL-ConfigurationCommon message, or tdd-UL-DL-ConfigurationDedicated Message 34. The method of claim 33, comprising at least one of:

36. 26. The method of claim 25, further comprising: transmitting a second message to a UE, the second message indicating that the transmission resource segments are to be reconfigured from the initial format to the extended flexible format.

37. determining that the transmission resource segments are to be reconfigured from the initial format to the extended flexible format; 26. The method of claim 25, comprising determining that the transmission resource segments are to be reconfigured from the initial format to the extended flexible format based on a predefined rule.

38. and transmitting an indication to the UE. The instructions are: a subset of the transmission resource segments; and a format of the subset of the transmission resource segments comprising one of a DL format, or a UL format; or a transmission scheduled for the subset of the transmission resource segments comprising one of a DL transmission or an UL transmission; and at least one of:

39. The instructions are: time domain information of the subset of the transmission resource segments; or Frequency domain information for the subset of the transmission resource segments.

40. The method of claim 38, comprising at least one of:

40. The instructions are: A dynamic scheduling message comprising a downlink control information (DCI) message; Semi-static configuration messages, DL Semi-Persistent Scheduling (SPS) scheduling message, or UL Configuration Grant (CG) Scheduling Message 40. The method of claim 38, comprising at least one of:

41. 26. The method of claim 25, further comprising: transmitting an indication to a UE indicating that a subset of the transmission resource segments in the time and frequency domain is scheduled for transmission, the scheduled transmission comprising a DL transmission or an UL transmission, and a direction of the scheduled transmission different from the initial transmission direction of the first subpool.

42. the transmission resource segment includes a first BWP of a DL or an UL; The method further includes determining that a BWP configuration of the first BWP is the same as a second BWP in a second subpool of the at least one subpool, the second subpool having an initial direction that is the same as a direction associated with the first BWP, and the BWP configuration is: Bandwidth, center frequency, a control channel configuration, the control channel comprising at least one of a physical uplink control channel (PUCCH) or a physical downlink control channel (PDCCH); A data channel configuration, the data channel comprising at least one of a Physical Uplink Shared Channel (PUSCH) or a Physical Downlink Shared Channel (PDSCH); or Numerology 26. The method of claim 25, comprising at least one of:

43. The configuration of the control channel: Search space configuration, or Control Resource Set (CORESET) Configuration 43. The method of claim 42, comprising at least one of:

44. the transmission resource segment comprises a first BWP for DL ​​or UL; 26. The method of claim 25, wherein the method further comprises determining that a BWP configuration of the first BWP is different from a second BWP in a second subpool of the at least one subpool, the second subpool having an initial direction that is the same as a direction associated with the first BWP.

45. A device for wireless communication comprising a memory for storing computer instructions and a processor in communication with said memory, said processor being configured, when executing said computer instructions, to implement a method according to any one of claims 1 to 44.

46. 45. A computer program product comprising a non-transitory computer readable program medium having computer code stored thereon, the computer code, when executed by one or more processors, causing the one or more processors to implement a method according to any one of claims 1 to 44.

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