Transmission scheduling for time division duplex systems.

Abstract

Methods, apparatus, and systems are disclosed that enable scheduling of data transmissions for both half-duplex and full-duplex transmissions in a time division duplex (TDD) system. In one exemplary aspect, a method for wireless communication includes receiving, by a terminal device, scheduling information from a base station indicating resources for transmission in a first direction, the resources comprising at least one symbol configured for use in a second direction different from the first direction, and performing, by the terminal device, a transmission with the base station in the first direction using the at least one symbol in the resources.

Description

[Technical Field]

[0001] This patent document relates generally to wireless communications. [Background technology]

[0002] Mobile communication technologies are moving the world towards an increasingly connected and networked society. Rapid growth in mobile communications and technological advances are driving the demand for increased capacity and improved connectivity. Other aspects such as energy consumption, device cost, spectral efficiency, and latency are also important to meet the needs of various communication scenarios. Various technologies are being discussed, including new methods to provide higher quality of service, longer battery life, and improved performance. Summary of the Invention [Means for solving the problem]

[0003] This patent document describes, among other things, a technique that enables scheduling of data transmissions for both half-duplex and full-duplex transmissions in a Time Division Duplexing (TDD) system.

[0004] In one exemplary aspect, a method for wireless communication includes receiving, by a terminal device, scheduling information from a base station indicating resources for transmission in a first direction, the resources comprising at least one symbol configured for use in a second direction different from the first direction; and performing, by the terminal device, a transmission with the base station in the first direction using the at least one symbol in the resources.

[0005] In another exemplary aspect, a method for wireless communication includes transmitting, by a base station, scheduling information to a user equipment indicating resources for transmission in a first direction, the resources comprising at least one symbol configured for use in a second direction different from the first direction; and performing, by the base station, a transmission with a terminal device in the first direction using the at least one symbol in the resources.

[0006] In another exemplary aspect, a method for wireless communication includes receiving, by a terminal device, configuration information from a base station configuring one or more subbands in a carrier for performing transmission in a first direction, the one or more subbands including at least one symbol configured for use in a second direction different from the first direction; after receiving the configuration information, receiving, by the terminal device, a signaling message from the base station indicating selection of a subband from the one or more subbands for performing transmission based on the configuration information or adjustment of the one or more subbands; and performing, by the terminal device, transmission with the base station using the subbands.

[0007] In another exemplary aspect, a method for wireless communication includes transmitting, by a base station, configuration information to a terminal device configuring one or more subbands in a carrier for performing transmission in a first direction, the one or more subbands including at least one symbol configured for use in a second direction different from the first direction; after transmitting the configuration information, transmitting, by the base station, to the terminal device a signaling message indicating selection of a subband from the one or more subbands for performing transmission based on the configuration information or adjustment of the one or more subbands; and performing, by the base station, transmission to the terminal device using the subbands.

[0008] In another exemplary aspect, a communications apparatus is disclosed, the apparatus including a processor configured to perform the method described above.

[0009] In yet another exemplary aspect, a computer program storage medium is disclosed that includes stored code that, when executed by a processor, causes the processor to perform the described method.

[0010] These aspects, and others, are outlined in this document. The present invention provides, for example, the following. (Item 1) 1. A method for wireless communication, the method comprising: receiving, by a terminal device, scheduling information from a base station indicating resources for transmission in a first direction, the resources comprising at least one symbol configured for use in a second direction different from the first direction; performing, by the terminal device, the transmission with the base station in the first direction using the at least one symbol in the resource; 12. A method for wireless communication, comprising: (Item 2) Item 10. The method of item 1, further comprising reporting, by the terminal device, capability information indicating support for performing transmission in the first direction using the resource to the base station. (Item 3) 3. The method of claim 1, further comprising receiving, by the terminal device, configuration information for subbands of a carrier from the base station in radio resource control (RRC) signaling, the configuration information specifying that the subbands are configured for transmission in the first direction, the resources being allocated to the subbands, and the subbands containing symbols for use in the second direction. (Item 4) 1. A method for wireless communication, the method comprising: transmitting, by a base station, scheduling information to a terminal device indicating resources for transmission in a first direction, the resources comprising at least one symbol configured for use in a second direction different from the first direction; performing, by the base station, the transmission with the terminal device in the first direction using the at least one symbol in the resource; 12. A method for wireless communication, comprising: (Item 5) 5. The method of claim 4, further comprising receiving, by the base station, capability information from the terminal device indicating support for performing transmission in the first direction using the resource. (Item 6) 6. The method of claim 4 or 5, further comprising transmitting, by the base station in radio resource control (RRC) signaling to the terminal device, configuration information for subbands of a carrier, the configuration information specifying that the subbands are configured for transmission in the first direction, the resources being allocated to the subbands, and the subbands containing symbols for use in the second direction. (Item 7) 7. The method according to any one of items 1 to 6, wherein the scheduling information is carried in downlink control information signaling. (Item 8) 8. The method according to any one of items 1 to 7, wherein the first direction is an uplink direction from the terminal device to the base station or a downlink direction from the base station to the terminal device. (Item 9) 1. A method for wireless communication, the method comprising: receiving, by a terminal device, configuration information from a base station configuring one or more subbands in a carrier for transmission in a first direction, the one or more subbands including at least one symbol configured for use in a second direction different from the first direction; receiving, by the terminal device after receiving the configuration information, from the base station a signaling message indicating selection of a subband from the one or more subbands for performing the transmission or adjustment of the one or more subbands based on the configuration information; performing, by the terminal device, the transmission with the base station using the subband; 12. A method for wireless communication, comprising: (Item 10) 1. A method for wireless communication, the method comprising: transmitting, by a base station to a terminal device, configuration information for configuring one or more subbands in a carrier for performing transmission in a first direction, the one or more subbands including at least one symbol configured for use in a second direction different from the first direction; After transmitting the configuration information, transmitting, by the base station, to the terminal device, a signaling message indicating selection of a subband from the one or more subbands or adjustment of the one or more subbands for performing the transmission based on the configuration information; performing, by the base station, the transmission with the terminal device using the subband; 12. A method for wireless communication, comprising: (Item 11) 11. The method of claim 9, wherein the adjusting of the one or more subbands comprises adjusting a frequency domain size of the subband while maintaining a frequency domain center of the subband. (Item 12) 11. The method of claim 9, wherein the adjusting of the one or more subbands includes adjusting both a frequency domain size and a frequency domain center of a subband. (Item 13) 13. The method of claim 11, wherein predefined or preconfigured frequency domain resources in the one or more subbands are skipped in the adjustment. (Item 14) Item 11. The method of item 9 or 10, wherein the adjusting of the one or more sub-bands includes adjusting a time domain position of the sub-bands. (Item 15) Item 15. The method of item 14, wherein the time domain location of the subband is expressed using a time domain unit, the time domain unit being at least one of a slot or a symbol. (Item 16) 16. The method of claim 14, wherein the adjusted subband comprises a portion of a time domain unit of the constructed subband. (Item 17) 17. The method of any of items 15 to 16, wherein predefined or preconfigured time domain units in the one or more subbands are skipped in the adjustment. (Item 18) 18. A communication device comprising a processor configured to perform the method according to any one or more of items 1 to 17. (Item 19) 18. A stored computer program product having code stored therein, the code, when executed by a processor, causing the processor to perform the method of any one or more of items 1 to 17. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 shows an example of a radio frame structure for time division duplex transmission.

[0012] [Figure 2A] FIG. 2A is a flowchart representation of a method for wireless communication in accordance with one or more embodiments of the present technology.

[0013] [Figure 2B] FIG. 2B is a flowchart representation of another method for wireless communication in accordance with one or more embodiments of the present technology.

[0014] [Figure 3A]FIG. 3A is a flowchart representation of another method for wireless communication in accordance with one or more embodiments of the present technology.

[0015] [Figure 3B] FIG. 3B is a flowchart representation of yet another method for wireless communication in accordance with one or more embodiments of the present technology.

[0016] [Figure 4] FIG. 4 illustrates an exemplary frequency domain reconstruction in accordance with one or more embodiments of the present technology.

[0017] [Figure 5] FIG. 5 illustrates an exemplary time-domain reconstruction in accordance with one or more embodiments of the present technology.

[0018] [Figure 6] FIG. 6 illustrates another exemplary time-domain reconstruction in accordance with one or more embodiments of the present technology.

[0019] [Figure 7] FIG. 7 illustrates an example wireless communication system in which techniques according to one or more embodiments of the present technology may be applied.

[0020] [Figure 8] FIG. 8 is a block diagram representation of a portion of a wireless station in which techniques according to one or more embodiments of the present technology may be applied. DETAILED DESCRIPTION OF THE INVENTION

[0021] Section headings are used in this document solely to improve readability and are not intended to limit the scope of the disclosed embodiments and technologies in each section to that section alone. Certain features are described using the example of a fifth-generation (5G) wireless protocol. However, the applicability of the disclosed technologies is not limited to only 5G wireless systems.

[0022] For TDD communication, a single frequency band is used for both transmitting and receiving data. Figure 1 shows an example of a radio frame structure 100 for TDD transmission. Spectral resources are divided in the time domain into a downlink (e.g., from a base station to a terminal device) and an uplink (e.g., from a terminal device to a base station). That is, only the uplink or the downlink can be performed at a given time in a TDD system (also known as half-duplex, communication in only one direction at a time).

[0023] Although TDD systems do not support simultaneous communication in both directions (also known as full duplex), they can be configured to emulate a full-duplex experience by having adjacent time domain units in both directions (with guard bands in between) to improve transmission efficiency for TDD systems. Supporting full-duplex transmission can lead to increased cost and complexity for both base stations and terminal devices. While it is often possible to handle such complexity at the base station side, performing full-duplex transmission at the terminal device side can result in increased cost and power consumption, potentially leading to a degraded user experience. Therefore, a split solution that allows base stations to support full-duplex TDD transmission while terminal devices continue to support half-duplex TDD transmission is more desirable for improving transmission efficiency of TDD systems. This patent document discloses techniques that can be implemented in various embodiments to enable scheduling of data transmissions for both half-duplex and full-duplex TDD transmissions. In particular, a base station can configure selected subbands within a carrier to be dedicated to downlink or uplink transmissions. UEs can transmit in the specified direction according to the subband configuration without checking the symbol direction in the subbands. For example, a subband may be configured as a downlink subband, but the subband still includes some uplink / flexible symbols. The UE can perform downlink transmission using the subband without having to check whether transmission needs to be canceled for the uplink / flexible symbols. As another example, a subband may be configured as an uplink subband, but the subband still includes some downlink / flexible symbols. The UE can perform uplink transmission using the subband without having to check whether transmission needs to be canceled for the downlink / flexible symbols.

[0024] (Embodiment 1)

[0025] In some scenarios, a terminal device or user equipment (UE) may support split full-duplex and half-duplex transmission schemes but is unaware of the subbands configured in the carrier. The base station may indicate the transmission scheme in scheduling information to facilitate efficient transmission. FIG. 2A is a flowchart representation of a method 200 for wireless communication in accordance with one or more embodiments of the present technology. The method 200 includes, at operation 210, receiving, by the terminal device, scheduling information from a base station indicating resources for transmission in a first direction. The resources include at least one symbol configured for use in a second direction different from the first direction. The method 200 also includes, at operation 220, performing, by the terminal device, a transmission with the base station in the first direction using the at least one symbol in the resources. In some embodiments, the method also includes, by the terminal device, reporting capability information to the base station indicating support for performing transmission in the first direction using the resources.

[0026] 2B is a flowchart representation of a method 250 for wireless communication in accordance with one or more embodiments of the present technology. Method 250 includes, at operation 260, transmitting, by a base station, scheduling information to a user equipment indicating resources for transmission in a first direction. The resources include at least one symbol configured for use in a second direction, different from the first direction. Method 250 also includes, at operation 270, performing, by the base station, a transmission with a terminal device in the first direction using the at least one symbol in the resources. In some embodiments, the method also includes receiving, by the base station, capability information from the terminal device indicating support for performing transmission in the first direction using the resources.

[0027] In some embodiments, the scheduling information is carried in downlink control information signaling. The first direction can be an uplink direction from the terminal device to the base station or a downlink direction from the base station to the terminal device. The second direction can be a different, opposite transmission, i.e., a downlink direction from the base station to the terminal device and an uplink direction from the terminal device to the base station.

[0028] In some embodiments, a base station can notify a terminal device or UE of a subband configuration. The base station can transmit configuration information for subbands of a carrier in radio resource control (RRC) signaling, and the terminal device can receive the information. The configuration information specifies that the subband is configured for transmission in a first direction and that resources for transmission are located in the subband. The subband includes symbols for use in a second direction.

[0029] Some examples of the disclosed techniques are further described below.

[0030] (UE capability report)

[0031] To enable the base station to transmit appropriate scheduling information, the UE can report its capability to support the split transmission scheme. In some embodiments, a UE capability information element or signaling message can be introduced to indicate that the UE supports control signaling or data transmission in scheduled resources located in subbands configured for uplink or downlink transmission, even if the direction of symbols in the resource is opposite to the transmission direction of the control signaling or data. In some embodiments, a UE capability information element or signaling message can be introduced to indicate that the UE supports control signaling or data transmission in subbands configured for uplink or downlink transmission, even if the direction of symbols in the subband is opposite to the transmission direction of the control signaling or data. In some embodiments, a UE capability information element or signaling message can be introduced to indicate that the UE supports control signaling or data transmission in resources scheduled for uplink or downlink transmission, even if the direction of symbols in the resource is opposite to the transmission direction of the control signaling or data.

[0032] Upon receiving the UE capability information, the base station can proceed to configure a subband and / or schedule the UE to transmit or receive data / control information using resources in the subband. For example, the base station can schedule the UE to perform downlink transmission using resource B in the subband (i.e., the UE is scheduled to receive downlink control information or data on scheduled resource B in the subband). However, resource B includes some symbols configured as uplink symbols. Given the UE capability and scheduling information, the UE can perform downlink transmission using the uplink symbols in resource B without needing to perform any check of symbol direction. As another example, the base station can schedule the UE to perform uplink transmission using resource B in the subband (i.e., the UE is scheduled to transmit uplink control information or data on scheduled resource B in the subband). However, resource B includes some symbols configured as downlink symbols. Given the UE capability and scheduling information, the UE can perform uplink transmission using the downlink symbols in resource B without needing to perform any check of symbol direction.

[0033] If the UE does not report its capabilities to the base station or the base station does not receive any UE capability information regarding the split transmission scheme, the base station may refrain from scheduling the UE using such resources.

[0034] (Sub-band configuration)

[0035] In response to the UE capability information, the base station can configure downlink or uplink subbands of a carrier / cell for the UE in the frequency domain, as described above. For example, the size of the subband bandwidth can be configured in the frequency domain, and the symbols the subbands contain can be configured in the time domain. The symbols can be a combination of one or more types of symbols, such as downlink symbols (D), uplink symbols (U), and flexible symbols (F), as shown in FIG. 1. The configuration can be transmitted using radio resource control (RRC) signaling.

[0036] A subband is configured to be used for transmission in a particular direction but still contains symbols in the opposite direction. For example, a configured downlink subband may contain uplink symbols, but a UE supporting a split transmission scheme may perform downlink transmission using the subband regardless of the uplink and / or flexible symbols in the subband. As another example, a configured uplink subband may contain downlink symbols. A UE supporting a split transmission scheme may perform uplink transmission using the subband regardless of the downlink and / or flexible symbols in the subband.

[0037] (Scheduling information instruction)

[0038] In some embodiments, when a base station configures one or more subbands for transmission, the base station uses existing DCI formats, such as DCI 0-0, DCI 0-1, DCI 0-2, DCI 1-0, DCI 1-1, and DCI 1-2, to indicate scheduling information. If a UE does not support the split transmission scheme and receives scheduling information using one of the existing DCI formats, the UE may check the direction of the symbols and cancel transmissions in symbols with the opposite direction.

[0039] However, in some cases, the UE supports the split transmission scheme but is unaware of the subband configuration. Nevertheless, the UE can perform appropriate transmissions using resources according to the scheduling information. The base station can adopt a new DCI format or introduce a new parameter to indicate the scheduling information for the split transmission scheme. If the UE is not configured with subbands for the split transmission scheme, the scheduling information can indicate a resource (e.g., resource E) for the UE to perform transmission (e.g., uplink / downlink transmission) and an action the UE should take based on the new format or the new parameter. For example, based on the value of the parameter (e.g., 0), the UE can perform uplink transmission as scheduled using resource E, even if resource E includes downlink symbols. If the parameter has a different value (e.g., 1), the UE can perform uplink transmissions using the uplink symbols of resource E but can cancel transmissions on the downlink symbols of resource E. In some embodiments, based on the value of the parameter (e.g., 2), the UE can cancel uplink transmissions if the UE detects that resource E includes downlink symbols. As another example, based on the value of the parameter (e.g., 0), the UE can perform downlink transmission as scheduled using resource E, even if resource E includes uplink symbols. If the parameter has a different value (e.g., 1), the UE can perform downlink transmission using the downlink symbols of resource E, but can cancel transmission on the uplink symbols of resource E. In some embodiments, based on the value of the parameter (e.g., 2), the UE can cancel downlink transmission if the UE detects that resource E includes uplink symbols.

[0040] In some embodiments, the UE supports a split transmission scheme, and the UE is configured with subbands for the split transmission scheme (e.g., without being configured with specific resources in the subbands). The UE can perform appropriate transmissions in the subbands according to the scheduling information. The base station can adopt a new DCI format or introduce a new parameter to indicate the scheduling information for the split transmission scheme. If the UE is configured with the aforementioned subbands, the scheduling information can indicate the subbands for the UE to perform transmissions (e.g., uplink / downlink transmissions) and the actions the UE should take based on the new format or the new parameter. For example, based on a value of the parameter (e.g., 0), the UE can perform uplink transmissions as scheduled using subbands configured for uplink transmissions, even if the subbands include downlink symbols. If the parameter has a different value (e.g., 1), the UE can perform uplink transmissions using uplink symbols of the subbands, but can cancel transmissions in downlink symbols of the subbands. In some embodiments, based on a value of the parameter (e.g., 2), the UE can cancel uplink transmissions if the UE detects that the subbands include downlink symbols. In another example, based on the value of the parameter (e.g., 0), the UE can perform downlink transmission as scheduled using a subband configured for downlink transmission, even if the subband includes uplink symbols. If the parameter has a different value (e.g., 1), the UE can perform downlink transmission using the subband's downlink symbols but can cancel transmission in the subband's uplink symbols. In some embodiments, based on the value of the parameter (e.g., 2), the UE can cancel downlink transmission if the UE detects that the subband includes uplink symbols.

[0041] In some embodiments, the UE supports a split transmission scheme and is configured with one or more resources in a subband for the split transmission scheme. The UE can perform appropriate transmissions using the resources in the subband according to the scheduling information. The base station can adopt a new DCI format or introduce a new parameter to indicate the scheduling information for the split transmission scheme. If the UE is configured with the aforementioned subbands, the scheduling information can indicate a resource (e.g., resource B) in the subband for the UE to perform transmission (e.g., uplink / downlink transmission) and an action the UE should take based on the new format or the new parameter. For example, based on a value of the parameter (e.g., 0), the UE can perform uplink transmission as scheduled using resource B, even if resource B includes downlink symbols. If the parameter has a different value (e.g., 1), the UE can perform uplink transmissions using uplink symbols of resource B, but can cancel transmissions on downlink symbols of resource B. In some embodiments, based on a value of the parameter (e.g., 2), the UE can cancel uplink transmissions if the UE detects that resource B includes downlink symbols. As another example, based on the value of the parameter (e.g., 0), the UE may perform downlink transmission as scheduled using resource B, even if resource B includes uplink symbols. If the parameter has a different value (e.g., 1), the UE may perform downlink transmission using the downlink symbols of resource B, but may cancel transmission on the uplink symbols of resource B. In some embodiments, based on the value of the parameter (e.g., 2), the UE may cancel downlink transmission if the UE detects that resource B includes uplink symbols.

[0042] In some embodiments, the base station may use a radio network temporary identifier (RNTI) value scrambling the DCI to implicitly indicate the UE's behavior. For example, the DCI signaling may be scrambled with different predefined RNTI values ​​corresponding to different types of UE behavior. For example, if the DCI signaling is scrambled using a first predefined RNTI value, the UE may perform uplink transmission as scheduled using resource B, even if resource B includes downlink symbols. If the DCI signaling is scrambled using a second predefined RNTI value, the UE may perform uplink transmission using the uplink symbols of resource B, but may cancel transmissions on downlink symbols of resource B. If the DCI signaling is scrambled using a third predefined RNTI value, the UE may cancel uplink transmissions if the UE detects that resource B includes downlink symbols.

[0043] In the above embodiment, the base station can determine the DCI format, parameters, and / or RNTI value based on the capability information reported by the UE. By using the new DCI format / parameter / RNTI value, the base station can schedule transmissions in a split manner without notifying the UE of the subband configuration in advance.

[0044] (Embodiment 2)

[0045] If these sub-bands are configured by the base station (e.g., using RRC signaling), it may be desirable to update the configuration from time to time. This embodiment discloses techniques that may be used to dynamically adjust or (re)configure the sub-bands using lower layer signaling (e.g., using Medium Access Control (MAC) Control Element (CE) or DCI signaling).

[0046] In some embodiments, a base station may configure a set of candidate uplink or downlink subbands via RRC signaling. The base station then transmits MAC-CE or DCI signaling to indicate a subset of the configured subbands to be used for transmission. The MAC-CE or DCI signaling may include a subband index indicating a particular configured subband. In some embodiments, the base station transmits MAC-CE or DCI signaling to indicate updated configuration information for the subbands configured via RRC signaling.

[0047] 3A is a flowchart representation of a method for wireless communication according to one or more embodiments of the present technology. The method 300 includes, at operation 310, receiving, by a terminal device, configuration information from a base station configuring one or more subbands in a carrier for performing transmission in a first direction. The one or more subbands include at least one symbol configured for use in a second direction different from the first direction. After receiving the configuration information, the method 300 includes, at operation 320, receiving, by the terminal device, a signaling message from the base station indicating selection of a subband from the one or more subbands for performing transmission based on the configuration information or adjustment of the one or more subbands. The method 300 also includes, at operation 330, performing transmission with the base station using the subbands.

[0048] 3B is a flowchart representation of a method for wireless communication according to one or more embodiments of the present technology. Method 350 includes, at operation 360, transmitting, by a base station, configuration information to a terminal device that configures one or more subbands in a carrier for transmission in a first direction. The one or more subbands include at least one symbol configured for use in a second direction different from the first direction. Method 350 also includes, at operation 370, after transmitting the configuration information, transmitting, by the base station, to the terminal device, a signaling message indicating selection of a subband from the one or more subbands for transmission based on the configuration information or adjustment of the one or more subbands. Method 350 also includes, at operation 380, performing transmission with the terminal device using the subbands.

[0049] In some embodiments, adjusting one or more subbands includes adjusting the frequency domain size of the subbands while maintaining the frequency domain center of the subbands.

[0050] In some embodiments, adjusting one or more subbands includes adjusting both the frequency domain size and frequency domain center of the subband.

[0051] In some embodiments, predefined or preconfigured frequency domain resources in one or more subbands are skipped in the adjustment.

[0052] In some embodiments, adjusting one or more subbands includes adjusting a time domain position of the subband. In some embodiments, the time domain position of the subband is expressed using a time domain unit, the time domain unit being at least one of a slot or a symbol. In some embodiments, the adjusted subband includes a portion of the time domain units of the configured subband. In some embodiments, predefined or preconfigured time domain units in one or more subbands are skipped in the adjustment.

[0053] Some examples of the disclosed techniques are further described below.

[0054] (Frequency domain adjustment)

[0055] In some embodiments, a base station may employ a new DCI format or new parameters in DCI signaling to indicate (or configure) the frequency domain location and / or frequency domain size of subbands in the frequency domain. For example, a UE is configured with uplink or downlink subbands via RRC signaling. The base station then transmits MAC-CE or DCI signaling to modify the location and / or size of the configured subbands in the frequency domain. In some embodiments, the subbands configured by MAC-CE or DCI signaling may completely or at least partially override the original configured subband configuration. In some embodiments, the MAC-CE or DCI signaling may include information for configuring new subbands.

[0056] In some embodiments, the method of indicating (or (re)configuring) the frequency domain location and / or frequency domain size of the subband may include one of the following information:

[0057] (1) The center frequency of the subband and the number of RBs on either side of the center frequency.

[0058] (2) A starting resource block (RB) index and / or an ending RB index of a subband. A subband includes configured contiguous RBs.

[0059] (3) The starting RB index and the number of consecutive RBs of a subband. A subband includes consecutive RBs.

[0060] (4) Center frequency of a subband. A subband has a predefined number of RBs.

[0061] (5) Starting RB of a subband. A subband includes a predefined number of RBs.

[0062] (6) The number of RBs in the subband. The subband has a predefined center frequency (for example, the center frequency is at the center of the configured bandwidth portion (BWP)).

[0063] (7) Number of RBs in a subband: A subband has a predefined starting RB (eg, the starting RB is associated with a channel having a known position).

[0064] When the UE receives MAC-CE or DCI signaling, the UE can redetermine the location and / or size of the configured subbands according to the signaling. The subbands can be configured as common subbands or UE-specific subbands. When DCI signaling is used to indicate the subbands or subband configuration, the DCI signaling can be common DCI or UE-specific DCI.

[0065] In some embodiments, to facilitate faster subband switching or adjustment, MAC-CE or DCI signaling includes information for updating subband size without significantly changing the subband's center frequency. For example, FIG. 4 illustrates an exemplary frequency-domain reconfiguration in accordance with one or more embodiments of the present technology. As shown in FIG. 4, MAC-CE or DCI signaling can change the frequency-domain size of configured subband 401 so that newly configured subband 403 or 405 maintains the same center frequency 411. In some embodiments, MAC-CE or DCI signaling indicates a small change in the subband's center frequency so that subband 409's modified center frequency 413 is still within the frequency-domain range of the original configured subband. Here, the adjusted or (re)configured subband 409 is still a subband within the original configured subband. In this case, although the center frequencies of subband 409 and the original configured subband 401 are different, subband 409 is still within the frequency bandwidth of the original subband 401. The base station and the UE can continue to transmit on subband 409 using the bandwidth of the original subband 401, thereby achieving fast switching between subbands.

[0066] In some embodiments, the frequency location and size of the subbands can be adjusted independently, while in some embodiments, the frequency location and size are adjusted jointly.

[0067] In some embodiments, a configured subband may include predefined resource blocks or resource elements (e.g., one subcarrier in the frequency domain) configured to support predetermined operations (e.g., legacy UE operations or other operations predefined by the base station and / or the UE). These predefined resource blocks or resource elements may be skipped or excluded from a subband configured for transmission in a partitioned manner, thereby enabling backward compatibility for legacy UEs or other legacy operations.

[0068] (time domain adjustment)

[0069] In some embodiments, a base station may employ a new DCI format or new parameters in DCI signaling to indicate (or configure) the time domain location of a subband using time units such as symbols, slots, and / or a combination of symbols and slots. For example, the time domain location of a subband may be described using the starting position (e.g., slot or symbol) and size (e.g., how many consecutive time domain units are included in the subband) of the time unit. The starting position may be conveyed in MAC-CE or DCI signaling. The starting position may also be indicated inherently using the time unit (e.g., slot or symbol) in which the MAC-CE or DCI signaling is transmitted / received (e.g., the slot in which the DCI is located and / or the last symbol of the physical downlink channel or CORESET in which the DCI is located). In some embodiments, the time domain location of a subband may be indicated using a periodic time domain unit (e.g., slot or symbol). For example, the signaling may convey information indicating that a period of N time domain units (e.g., symbols), starting from a specific time domain location, is part of the subband.

[0070] The indication of time-domain configuration information can be performed together with or separately from the frequency-domain configuration. For example, a UE is configured with uplink or downlink subbands via RRC signaling. The base station then transmits MAC-CE or DCI signaling to modify the time-domain positions of the subbands. In some embodiments, the subbands configured by MAC-CE or DCI signaling can completely or at least partially override the original configured subband configuration. In some embodiments, the MAC-CE or DCI signaling can include information for configuring new subbands.

[0071] When the UE receives MAC-CE or DCI signaling, the UE can redetermine the time-domain locations of the configured subbands according to the signaling. The subbands can be configured as common subbands or UE-specific subbands. When DCI signaling is used to indicate the subband or subband configuration, the DCI signaling can be common DCI or UE-specific DCI.

[0072] In some embodiments, to facilitate faster subband switching or adjustment, MAC-CE or DCI signaling includes information for reconfiguring subbands based on their original time-domain positions and sizes. In some embodiments, the signaling includes information for reducing the time-domain size of a subband so that the reconfigured subband uses a portion of the time-domain resources of the original configured subband. For example, FIG. 5 illustrates an exemplary time-domain reconfiguration in accordance with one or more embodiments of the present technology. As shown in FIG. 5, subband 501 is configured with a set of time-domain units (e.g., frames, slots, or symbols) called Set A. MAC-CE or DCI signaling includes configuration information for updating subband 503 to have a portion of the time-domain units called Set B (i.e., Set B is part of Set A). In some embodiments, the signaling includes information for increasing the time-domain size of a subband so that the original configured subband uses a portion of the time-domain resources of the reconfigured subband. For example, as shown in Figure 5, MAC-CE or DCI signaling includes configuration information to update subbands 505 to have part of a time domain unit called Set C (i.e., Set A is part of Set C). In some embodiments, the location and size of the time domain can be adjusted independently. In some embodiments, the location and size of the time domain are adjusted together.

[0073] In some embodiments, a subband includes some or all of the symbols in a slot among the configured slots. MAC-CE or DCI signaling further indicates which symbols in a slot are configured for the subband. For example, FIG. 6 illustrates another exemplary time-domain reconstruction in accordance with one or more embodiments of the present technology. As shown in FIG. 6, the signaling conveys or indicates information for determining the starting position of a subband (e.g., a slot). The signaling includes information regarding the duration / number of slots (e.g., P=3) of the slot and information regarding the selected symbols 601a-601f in each slot used for the subband.

[0074] In some embodiments, the time domain location of the subbands is described in the DCI signaling on a slot-by-slot basis. The DCI signaling (function) may include one of the following information:

[0075] (1) The number of consecutive slots to be used as the time domain position of the subband starting from the slot where the DCI is placed.

[0076] (2) The number of consecutive slots to be used as the time-domain position of the subband starting from a specific slot indicated by or indicated by a predefined DCI. The predefined slot can be the first slot that fills the predefined timeline.

[0077] (3) In a period of N (for example, N is the number of slots) starting from the slot in which the DCI is placed, the determined slot is used as the time domain position of the subband.

[0078] (4) In a period of N (e.g., N is the number of slots) starting from a specific slot predefined or indicated by DCI, the determined slot is used as the time-domain position of the subband. The predefined slot may be the first slot that fills the predefined timeline.

[0079] In some embodiments, the time-domain location of the subband is described in the DCI signaling based on the OFDM symbol. The specific DCI signaling function includes one of the following: 1) how many consecutive symbols starting from the last symbol of the PDCCH or CORESET in which the DCI is placed are used as the time-domain location of the subband; 2) how many consecutive OFDM symbols starting from a specific OFDM symbol indicated by the DCI are used as the time-domain location of the subband, where the predefined OFDM symbol is the first OFDM symbol that fills the predefined timeline; 3) a series of OFDM symbols determined as the time-domain location of the subband in a period of M (M is the number of symbols) starting from the last symbol of the PDCCH or CORESET in which the DCI is placed; or 4) a series of OFDM symbols determined as the time-domain location of the subband in a period of M (M is the number of symbols) starting from the specific OFDM symbol indicated by the DCI. Here, the predefined OFDM symbol is the first OFDM symbol that fills the predefined timeline. 5) The OFDM symbols configured as subbands in each slot are described using bitmap signaling.

[0080] In some embodiments, the time-domain location of a subband is described in slot- and OFDM-symbol-based DCI signaling. The specific DCI signaling function includes two aspects: indicating the slot of a subband based on the above-described method for determining the time-domain location of a subband based on a slot, and indicating which OFDM symbols in the determined slot are configured as a subband based on the above-described method for determining the time-domain location of a subband based on an OFDM symbol.

[0081] In some embodiments, the configured subbands may include predefined slots or resource elements (e.g., one symbol in the time domain) configured to support predetermined operations (e.g., legacy UE operations, or other operations predefined by the base station and / or the UE). These predefined slots or resource elements may be skipped or excluded from the subbands configured for transmission in a split manner, thereby enabling backward compatibility for legacy UEs or other legacy operations.

[0082] In some embodiments, the following solutions may be preferably implemented: A set of preferred solutions may include the following (e.g., as described with reference to embodiments 1-2):

[0083] 1. A method for wireless communication, the method including: receiving, by a terminal device, scheduling information from a base station indicating resources for transmission in a first direction, the resources comprising at least one symbol configured for use in a second direction different from the first direction; and performing, by the terminal device, a transmission with the base station in the first direction using the at least one symbol in the resources.

[0084] 2. The method described in Solution 1, further comprising reporting, by the terminal device, capability information to the base station indicating support for performing transmission in the first direction using the resource.

[0085] 3. The method of any one of Solutions 1 and 2, further comprising receiving, by the terminal device, configuration information for subbands of a carrier from a base station in radio resource control (RRC) signaling, the configuration information specifying that the subbands are configured for transmission in the first direction, resources being allocated to the subbands, and the subbands containing symbols for use in the second direction.

[0086] 4. A method for wireless communication, the method including: transmitting, by a base station, scheduling information to a user equipment indicating resources for transmission in a first direction, the resources comprising at least one symbol configured for use in a second direction different from the first direction; and performing, by the base station, a transmission with a terminal device in the first direction using the at least one symbol in the resources.

[0087] 5. The method of solution 4, further comprising receiving, by the base station, capability information from the terminal device indicating support for performing transmission in the first direction using the resource.

[0088] 6. The method of Solution 4 or 5, further comprising transmitting, by the base station, in radio resource control (RRC) signaling to the terminal device, configuration information for subbands of the carrier, the configuration information specifying that the subbands are configured for transmission in a first direction, resources are allocated in the subbands, and the subbands include symbols for use in a second direction.

[0089] 7. The method according to any one of solutions 1 to 6, wherein the scheduling information is carried in downlink control information signaling.

[0090] 8. The method according to any one of solutions 1 to 7, wherein the first direction is an uplink direction from the terminal device to the base station or a downlink direction from the base station to the terminal device.

[0091] 9. A method for wireless communication comprising: receiving, by a terminal device, configuration information from a base station configuring one or more subbands in a carrier for performing transmission in a first direction, the one or more subbands including at least one symbol configured for use in a second direction different from the first direction; after receiving the configuration information, receiving, by the terminal device, a signaling message from the base station indicating selection of a subband from the one or more subbands for performing transmission or adjustment of one or more subbands based on the configuration information; and performing, by the terminal device, transmission with the base station using the subbands.

[0092] 10. A method for wireless communication, the method including: transmitting, by a base station, configuration information to a terminal device configuring one or more subbands in a carrier for performing transmission in a first direction, the one or more subbands including at least one symbol configured for use in a second direction different from the first direction; after transmitting the configuration information, transmitting, by the base station, to the terminal device, a signaling message indicating selection of a subband from the one or more subbands for performing transmission based on the configuration information or adjustment of the one or more subbands; and performing, by the base station, transmission with the terminal device using the subbands.

[0093] 11. The method of solution 9 or 10, wherein adjusting one or more subbands includes adjusting the frequency domain size of the subbands while maintaining the frequency domain center of the subbands.

[0094] 12. The method of solution 9 or 10, wherein adjusting one or more subbands includes adjusting both the frequency domain size and frequency domain center of the subband.

[0095] 13. The method of solution 11 or 12, wherein predefined or preconfigured frequency domain resources in one or more subbands are skipped in the adjustment.

[0096] 14. The method of solution 9 or 10, wherein adjusting one or more subbands includes adjusting the time domain position of the subbands.

[0097] 15. The method of solution 14, wherein the time domain position of the subband is expressed using a time domain unit, the time domain unit being at least one of a slot or a symbol.

[0098] 16. The method according to solution 14 or 15, wherein the adjusted subband comprises a portion of the time domain units of the constructed subband.

[0099] 17. The method according to any of solutions 15 to 16, wherein predefined or preconfigured time domain units in one or more subbands are skipped in the adjustment.

[0100] 18. A communications device comprising a processor configured to carry out a method according to any one or more of claims 1 to 17.

[0101] 19. A stored computer program product storing code which, when executed by a processor, causes the processor to perform a method according to any one or more of claims 1 to 17.

[0102] 7 illustrates an example wireless communication system 700 to which one or more embodiments of the present technology can be applied. The wireless communication system 700 may include one or more base stations (BSs) 705a, 705b, one or more wireless devices (UEs) 710a, 710b, 710c, and 710d, and a core network 725. The base stations 705a, 705b can provide wireless service to user devices 710a, 710b, 710c, and 710d in one or more wireless sectors. In some implementations, the base stations 705a, 705b include directional antennas that generate two or more directional beams to achieve wireless coverage in different sectors. The core network 725 can communicate with the one or more base stations 705a, 705b. The core network 725 provides connectivity with other wireless communication systems and wired communication systems. The core network may include one or more service subscription databases for storing information related to subscribed user devices 710a, 710b, 710c, and 710d. A first base station 705a may provide wireless service based on a first radio access technology, and a second base station 705b may provide wireless service based on a second radio access technology. The base stations 705a and 705b may be co-located or may be separately installed in the field depending on the deployment scenario. The user devices 710a, 710b, 710c, and 710d may support multiple different radio access technologies. The techniques and embodiments described herein may be implemented by the base stations of the wireless devices described herein.

[0103] 8 is a block diagram representation of a portion of a radio station to which techniques according to one or more embodiments of the present technology can be applied. A radio station 805, such as a network node, a base station, or a wireless device (or user device UE), can include processor electronics 810, such as a microprocessor, that implements one or more of the wireless techniques presented herein. The radio station 805 can include transceiver electronics 815 that transmit and / or receive wireless signals via one or more communication interfaces, such as an antenna 820. The radio station 805 can include other communication interfaces for transmitting and receiving data. The radio station 805 can include one or more memories (not explicitly shown) configured to store information such as data and / or instructions. In some implementations, the processor electronics 810 can include at least a portion of the transceiver electronics 815. In some embodiments, at least a portion of the disclosed techniques, modules, or functionality is implemented using the radio station 805. In some embodiments, the radio station 805 can be configured to perform the methods described herein.

[0104] It will be appreciated that this specification discloses techniques that may be embodied in various embodiments for facilitating efficient scheduling of split transmission schemes in which a base station performs full-duplex transmissions and half-duplex transmissions for TDD systems. The disclosed embodiments, as well as other embodiments, the modules and functional operations described herein may be implemented in digital electronic circuitry, or in computer software, firmware, or hardware, including the structures disclosed herein and their structural equivalents, or one or more combinations thereof. The disclosed embodiments and other embodiments may be implemented as one or more computer program products, i.e., one or more modules of computer program instructions encoded on a computer-readable medium for execution by or controlling the operation of a data processing apparatus. The computer-readable medium may be a machine-readable storage device, a machine-readable storage substrate, a memory device, a composition resulting in a machine-readable propagated signal, or one or more combinations thereof. The term "data processing apparatus" encompasses all apparatus, devices, and machines for processing data, including, by way of example, a programmable processor, a computer, or multiple processors or computers. In addition to hardware, an apparatus may include code that creates the execution environment for the computer program in question, e.g., code that constitutes processor firmware, a protocol stack, a database management system, an operating system, or one or more combinations thereof. A propagated signal is an artificially generated signal, e.g., a mechanically generated electrical, optical, or electromagnetic signal, that is generated to encode information for transmission to an appropriate receiving device.

[0105] A computer program (also known as a program, software, software application, script, or code) can be written in any form of programming language, including compiled or interpreted languages, and can be implemented as a stand-alone program or in any form including modules, components, subroutines, or other units suitable for use in a computing environment. A computer program does not necessarily correspond to a file in a file system. A program can be stored as part of a file that holds other programs or data (e.g., one or more scripts stored in a markup language document), in a single file dedicated to the program in question, or in multiple cooperating files (e.g., files storing one or more modules, subprograms, or portions of code). A computer program can be implemented to be executed on one computer, on multiple computers located at one site, or on multiple computers distributed across multiple sites and interconnected by a communications network.

[0106] The processes and logic flows described herein can be performed by one or more programmable processors executing one or more computer programs to perform functions by manipulating input data and generating output. The processes and logic flows can also be performed by, and an apparatus can be implemented as, special purpose logic circuitry, such as an FPGA (field programmable gate array) or an ASIC (application-specific integrated circuit). Processors suitable for executing computer programs include, by way of example, both general-purpose and special purpose microprocessors, and any one or more processors of any type of digital computer. Generally, a processor receives instructions and data from a read-only memory or a random-access memory, or both. The essential elements of a computer are a processor for executing instructions and one or more memory devices for storing instructions and data. Generally, a computer includes one or more mass storage devices, such as magnetic, magneto-optical, or optical disks, for storing data, or is operably coupled to receive data from them, transfer data to them, or both. However, a computer need not have such devices. Computer-readable media suitable for storing computer program instructions and data include, by way of example, semiconductor memory devices such as EPROM, EEPROM, and flash memory devices; magnetic disks, e.g., internal hard disks or removable disks; magneto-optical disks; and all forms of non-volatile memory, media, and memory devices, including CD-ROM and DVD-ROM disks. The processor and the memory can be supplemented by, or incorporated in, special purpose logic circuitry.

[0107] While this patent document contains many details, these should not be construed as limiting the scope of any invention or what may be claimed, but rather as descriptions of features that may be specific to particular embodiments of a particular invention. Any features described in this patent document in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented in multiple embodiments separately or in any suitable subcombination. Furthermore, while the features may be described above as functioning in particular combinations and may initially be claimed as such, in some cases, one or more features from a claimed combination may be deleted from the combination, and the claimed combination may be directed to a subcombination or a variation of the subcombination.

[0108] Similarly, although operations are shown in the figures in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown, or sequential order, or that all of the operations shown be performed, to achieve desirable results. Furthermore, the selection of various system components in the embodiments described in this patent document should not be understood as requiring such selection in all embodiments.

[0109] Only some implementations and examples have been described; other implementations, extensions and variations can be made based on what is described and illustrated in this patent document.

Claims

1. 1. A method for wireless communication, the method comprising: a terminal device receiving from a base station scheduling information indicating resources for transmission in a first direction, the resources comprising at least one symbol configured for use in a second direction different from the first direction, and the terminal device performing the transmission with the base station in the first direction using the at least one symbol in the resources; and the terminal device receiving from the base station in Radio Resource Control (RRC) signaling configuration information for subbands of a carrier, the configuration information specifying that the subbands are configured for transmission in the first direction, the resources being arranged in the subbands, the subbands including symbols for use in the second direction, the subbands being configured by first indicating a slot for the subband at a time domain location and then indicating a symbol for the subband in the indicated slot at the time domain location; or the terminal device receiving from the base station configuration information configuring one or more subbands in a carrier for performing transmission in a first direction, the one or more subbands including at least one symbol configured for use in a second direction different from the first direction; after receiving the configuration information, the terminal device receiving from the base station a signaling message indicating selection of a subband from the one or more subbands for performing the transmission or adjustment of the one or more subbands based on the configuration information; and the terminal device performing the transmission with the base station using the subbands, the subbands being configured by first indicating a slot for the subband at a time domain location and then indicating a symbol for the subband in the indicated slot at the time domain location. A method comprising:

2. The method of claim 1, further comprising the terminal device reporting capability information to the base station indicating support for performing transmission in the first direction using the resource.

3. 1. A method for wireless communication, the method comprising: a base station transmitting to a terminal device scheduling information indicating resources for transmission in a first direction, the resources comprising at least one symbol configured for use in a second direction different from the first direction; and the base station performing the transmission with the terminal device in the first direction using the at least one symbol in the resources; and the base station transmitting to the terminal device in radio resource control (RRC) signaling configuration information for subbands of a carrier, the configuration information specifying that the subbands are configured for transmission in the first direction, the resources being arranged in the subbands, the subbands including symbols for use in the second direction, the subbands being configured by first indicating a slot for the subband at a time domain location and then indicating a symbol for the subband in the indicated slot at the time domain location; or the base station transmitting to the terminal device configuration information configuring one or more subbands in a carrier for performing transmission in a first direction, the one or more subbands including at least one symbol configured for use in a second direction different from the first direction; and after transmitting the configuration information, the base station transmitting to the terminal device a signaling message indicating selection of a subband from the one or more subbands for performing the transmission or adjustment of the one or more subbands based on the configuration information; and the base station performing the transmission with the terminal device using the subbands, the subbands being configured by first indicating a slot for the subband at a time domain location and then indicating a symbol for the subband in the indicated slot at the time domain location. A method comprising:

4. The method of claim 3, further comprising the base station receiving capability information from the terminal device indicating support for performing transmission in the first direction using the resources.

5. The method of claim 1 , wherein the scheduling information is carried in downlink control information signaling.

6. The method of claim 1 , wherein the first direction is an uplink direction from the terminal device to the base station or a downlink direction from the base station to the terminal device.

7. The method of claim 1 , wherein the adjusting of the one or more sub-bands comprises adjusting a frequency-domain size of the sub-band while maintaining a frequency-domain center of the sub-band.

8. The method of claim 1 , wherein predefined or preconfigured frequency domain resources in the one or more subbands are skipped in the adjustment.

9. The method of claim 1 , wherein the adjusting of the one or more sub-bands comprises adjusting a time-domain position of the sub-bands.

10. 10. The method of claim 9, wherein the time-domain locations of the subbands are expressed using a time-domain unit, the time-domain unit being at least one of a slot or a symbol.

11. The method of claim 1 , wherein the adjusted subband comprises a portion of a time-domain unit of the constructed subband.

12. The method of claim 3 , wherein the adjusting of the one or more sub-bands comprises adjusting a frequency-domain size of the sub-band while maintaining a frequency-domain center of the sub-band.

13. The method of claim 3 , wherein predefined or preconfigured frequency domain resources in the one or more subbands are skipped in the adjustment.

14. The method of claim 3 , wherein the adjusting of the one or more sub-bands comprises adjusting a time-domain position of the sub-bands.

15. 15. The method of claim 14, wherein the time domain locations of the subbands are expressed using a time domain unit, the time domain unit being at least one of a slot or a symbol.

16. The method of claim 3 , wherein the adjusted subband comprises a portion of a time-domain unit of the constructed subband.

17. A wireless terminal device, the wireless terminal device comprising: a memory storing instructions; a processor in communication with the memory; Equipped with When the processor executes the instructions, the processor: receiving scheduling information from a base station indicating resources for transmission in a first direction, the resources comprising at least one symbol configured for use in a second direction different from the first direction, and performing the transmission with the base station in the first direction using the at least one symbol in the resources; and the terminal device receiving configuration information for subbands of a carrier from the base station in Radio Resource Control (RRC) signaling, the configuration information specifying that the subbands are configured for transmission in the first direction, the resources being arranged in the subbands, the subbands including symbols for use in the second direction, the subbands being configured by first indicating a slot for the subband at a time domain location and then indicating a symbol for the subband in the indicated slot at the time domain location; or receiving, from the base station, configuration information configuring one or more subbands in a carrier for performing transmission in a first direction, the one or more subbands including at least one symbol configured for use in a second direction different from the first direction; and, after receiving the configuration information, receiving from the base station a signaling message indicating selection of a subband from the one or more subbands for performing the transmission or adjustment of the one or more subbands based on the configuration information; and performing the transmission with the base station using the subbands, the subbands being configured by first indicating a slot for the subband at a time domain location and then indicating a symbol for the subband in the indicated slot at the time domain location. a wireless terminal device configured to cause the wireless terminal device to perform the steps of:

18. When the processor executes the instructions, the processor: reporting capability information to the base station indicating support for performing transmission in the first direction using the resources; 20. The wireless terminal device of claim 17, further configured to cause the wireless terminal device to perform:

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