阅读说明：本技术 使用正常循环前缀时隙格式对经扩展循环前缀传输进行时隙格式确定 (Slot format determination for extended cyclic prefix transmission using normal cyclic prefix slot format ) 是由 J·孙 H·李 徐慧琳 于 2019-02-26 设计创作，主要内容包括：描述了支持使用正常循环前缀(NCP)时隙格式对经扩展循环前缀(ECP)传输进行时隙格式确定的用于无线通信的方法、系统和设备。用于NCP时隙的时隙格式指示符(SFI)可以标识用于时隙内的不同码元的传输方向(例如,上行链路码元、下行链路码元、或灵活码元),并且SFI可以提供对将被使用的特定时隙格式的指示。时隙中的每个NCP码元的起始时间和结束时间可在时域上被映射到该时隙中的每个ECP码元的起始时间和结束时间。每个ECP码元的传输方向可以至少部分地基于至少一个NCP码元的在时域中与对应ECP码元完全或部分交叠的至少一部分的传输方向来确定。(Methods, systems, and devices for wireless communication are described that support slot format determination for Extended Cyclic Prefix (ECP) transmissions using a Normal Cyclic Prefix (NCP) slot format. A Slot Format Indicator (SFI) for an NCP slot may identify a transmission direction (e.g., uplink, downlink, or flexible symbols) for different symbols within the slot, and the SFI may provide an indication of the particular slot format to be used. The start time and end time of each NCP symbol in a slot may be mapped in the time domain to the start time and end time of each ECP symbol in the slot. The transmission direction of each ECP symbol may be determined based at least in part on the transmission direction of at least a portion of at least one NCP symbol that overlaps, completely or partially, the corresponding ECP symbol in the time domain.)

1. A method for wireless communication, comprising:

identifying, at a User Equipment (UE), a slot format for Normal Cyclic Prefix (NCP) transmission between the UE and a base station, the slot format indicating a transmission direction of each NCP symbol in a set of NCP symbols within a slot; and

determining a transmission direction of a corresponding Extended Cyclic Prefix (ECP) symbol based at least in part on a transmission direction of at least a portion of at least one NCP symbol that completely or partially overlaps the corresponding ECP symbol in a time domain, wherein a start time and an end time of each NCP symbol is mapped to each ECP symbol in a set of ECP symbols in the time domain.

2. The method of claim 1, wherein the determining comprises:

identifying a subset of NCP symbols in the time domain that overlap with a first ECP symbol in the set of ECP symbols; and

determining that the first ECP symbol has a flexible transmission direction when at least one NCP symbol in the subset of NCP symbols has a flexible transmission direction.

3. The method of claim 2, wherein the determining further comprises:

determining that the first ECP symbol has an uplink transmission direction when each NCP symbol in the subset of NCP symbols has an uplink transmission direction; and

determining that the first ECP symbol has a downlink transmission direction when each NCP symbol in the subset of NCP symbols has a downlink transmission direction.

4. The method of claim 1, wherein the determining comprises:

identifying a set of ordered transmission directions;

identifying a subset of NCP symbols in the time domain that completely or partially overlap with a first ECP symbol in the set of ECP symbols; and

determining a transmission direction of the first ECP symbol based on a highest ordered transmission direction of the set of ordered transmission directions within the subset of NCP symbols.

5. The method of claim 4, wherein the transmission direction indication ECP symbol has an uplink transmission direction, a downlink transmission direction, or a flexible transmission direction, and wherein the flexible transmission direction has a highest ordered transmission direction of the set of ordered transmission directions, the downlink transmission direction has a middle ordered transmission direction of the set of ordered transmission directions, and the uplink transmission direction has a lowest ordered transmission direction of the set of ordered transmission directions.

6. The method of claim 1, wherein the determining comprises:

identifying a subset of NCP symbols in the time domain that completely or partially overlap with a first ECP symbol in the set of ECP symbols;

determining one or more portions of the first ECP symbol in the time domain corresponding to one or more NCP symbols, or portions thereof, of the subset of NCP symbols; and

determining that a transmission direction of the first ECP symbol corresponds to a transmission direction of the NCP symbol for a longest portion of the one or more portions in the time domain of the first ECP symbol.

7. The method of claim 1, wherein the slot format is based on a reference subcarrier spacing (SCS) used for the NCP transmission, and wherein the ECP symbols have a different SCS from the reference SCS.

8. The method of claim 1, wherein the slot format is identified based at least in part on a group common physical downlink control channel (GC-PDCCH) transmission received from the base station.

9. The method of claim 1, wherein the set of ECP symbols each have a larger cyclic prefix than the NCP symbol.

10. A method for wireless communication, comprising:

identifying, at a base station, a slot format for Normal Cyclic Prefix (NCP) transmission between a User Equipment (UE) and the base station, the slot format indicating a transmission direction of each NCP symbol in a set of NCP symbols within a slot;

transmitting an indication of the slot format to the UE;

configuring the UE to determine a transmission direction of a corresponding Extended Cyclic Prefix (ECP) symbol based at least in part on a transmission direction of at least a portion of at least one NCP symbol that completely or partially overlaps the corresponding ECP symbol in a time domain, wherein a start time and an end time of each NCP symbol is mapped to each ECP symbol in a set of ECP symbols in the time domain; and

communicating with the UE based at least in part on the determination.

11. The method of claim 10, wherein the configuring comprises:

configuring the UE to identify a subset of NCP symbols that overlap in the time domain with a first ECP symbol of the set of ECP symbols; and

configuring the UE to determine that the first ECP symbol has a flexible transmission direction when at least one NCP symbol in the subset of NCP symbols has a flexible transmission direction.

12. The method of claim 11, wherein the configuring comprises:

configuring the UE to determine that the first ECP symbol has an uplink transmission direction when each NCP symbol in a subset of NCP symbols has an uplink transmission direction; and

configuring the UE to determine that the first ECP symbol has a downlink transmission direction when each NCP symbol in the subset of NCP symbols has a downlink transmission direction.

13. The method of claim 10, wherein the configuring comprises:

configuring the UE to identify a set of ordered transmission directions;

configuring the UE to identify a subset of NCP symbols that completely or partially overlap in the time domain with a first ECP symbol of a second set of ECP symbols; and

configuring the UE to determine a transmission direction of the first ECP symbol based on a highest ordered transmission direction of the set of ordered transmission directions within the subset of NCP symbols.

14. The method of claim 13, wherein the transmission direction indication ECP symbol has an uplink transmission direction, a downlink transmission direction, or a flexible transmission direction, and wherein the flexible transmission direction has a highest ordered transmission direction of the set of ordered transmission directions, the downlink transmission direction has a middle ordered transmission direction of the set of ordered transmission directions, and the uplink transmission direction has a lowest ordered transmission direction of the set of ordered transmission directions.

15. The method of claim 10, wherein the configuring comprises:

configuring the UE to identify a subset of NCP symbols that completely or partially overlap in the time domain with a first ECP symbol of a second set of ECP symbols;

configuring the UE to determine one or more portions of the first ECP symbol in the time domain corresponding to one or more NCP symbols, or portions thereof, of the subset of NCP symbols; and

configuring the UE to determine that a transmission direction of the first ECP symbol corresponds to a transmission direction of the NCP symbol for a longest portion of the one or more portions of the time domain of the first ECP symbol.

16. The method of claim 10, wherein the slot format is based on a reference subcarrier spacing (SCS) used for the NCP transmission, and wherein the ECP symbols have a different SCS from the reference SCS.

17. The method of claim 10, wherein the slot format is identified based at least in part on a group common physical downlink control channel (GC-PDCCH) transmission received from the base station.

18. An apparatus for wireless communication, comprising:

means for identifying, at a User Equipment (UE), a slot format for Normal Cyclic Prefix (NCP) transmission between the UE and a base station, the slot format indicating a transmission direction of each NCP symbol in a set of NCP symbols within a slot; and

means for determining a transmission direction of a corresponding Extended Cyclic Prefix (ECP) symbol based at least in part on a transmission direction of at least a portion of at least one NCP symbol that completely or partially overlaps the corresponding ECP symbol in a time domain, wherein a start time and an end time of each NCP symbol is mapped to each ECP symbol in a set of ECP symbols in the time domain.

19. The apparatus of claim 18, further comprising:

means for identifying a subset of NCP symbols that overlap, in the time domain, with a first ECP symbol of the set of ECP symbols; and

means for determining that the first ECP symbol has a flexible transmission direction when at least one NCP symbol in the subset of NCP symbols has a flexible transmission direction.

20. The apparatus of claim 19, further comprising:

means for determining that the first ECP symbol has an uplink transmission direction when each NCP symbol in the subset of NCP symbols has an uplink transmission direction; and

means for determining that the first ECP symbol has a downlink transmission direction when each NCP symbol in the subset of NCP symbols has a downlink transmission direction.

21. The apparatus of claim 18, further comprising:

means for identifying a set of ordered transmission directions;

means for identifying a subset of NCP symbols that completely or partially overlap in the time domain with a first ECP symbol of the set of ECP symbols; and

means for determining a transmission direction of the first ECP symbol based on a highest ordered transmission direction of the set of ordered transmission directions within the subset of NCP symbols.

22. The apparatus of claim 21, wherein the transmission direction indication ECP symbol has an uplink transmission direction, a downlink transmission direction, or a flexible transmission direction, and wherein the flexible transmission direction has a highest ordered transmission direction of the set of ordered transmission directions, the downlink transmission direction has a middle ordered transmission direction of the set of ordered transmission directions, and the uplink transmission direction has a lowest ordered transmission direction of the set of ordered transmission directions.

23. The apparatus of claim 18, further comprising:

means for identifying a subset of NCP symbols that completely or partially overlap in the time domain with a first ECP symbol of the set of ECP symbols;

means for determining one or more portions of the first ECP symbol in the time domain corresponding to one or more NCP symbols, or portions thereof, of the subset of NCP symbols; and

means for determining that a transmission direction of the first ECP symbol corresponds to a transmission direction of the NCP symbol for a longest portion of the one or more portions in the time domain of the first ECP symbol.

24. The apparatus of claim 18, wherein the slot format is based on a reference subcarrier spacing (SCS) used for the NCP transmission, and wherein the ECP symbols have a different SCS from the reference SCS.

25. The apparatus of claim 18, wherein the slot format is identified based at least in part on a group common physical downlink control channel (GC-PDCCH) transmission received from the base station.

26. The apparatus of claim 18, further comprising:

means for receiving configuration information from a base station; and

means for configuring a receiver or transmitter to use a transmission direction of ECP symbols corresponding to one or more partially or fully overlapping NCP symbols determined based on the mapping based at least in part on the configuration information.

27. An apparatus for wireless communication, comprising:

means for identifying, at a base station, a slot format for Normal Cyclic Prefix (NCP) transmission between a User Equipment (UE) and the base station, the slot format indicating a transmission direction of each NCP symbol in a set of NCP symbols within a slot;

means for transmitting an indication of the slot format to the UE;

means for configuring the UE to determine a transmission direction of a corresponding ECP symbol based at least in part on a transmission direction of at least a portion of at least one NCP symbol that completely or partially overlaps the corresponding ECP symbol in a time domain, wherein a start time and an end time of each NCP symbol is mapped to each ECP symbol in a set of ECP symbols in the time domain; and

means for communicating with the UE based at least in part on the determination.

28. The apparatus of claim 27, further comprising:

means for configuring the UE to identify a subset of NCP symbols that overlap in the time domain with a first ECP symbol of the set of ECP symbols; and

means for determining that the first ECP symbol has a flexible transmission direction when at least one NCP symbol in the subset of NCP symbols has a flexible transmission direction.

29. The apparatus of claim 28, further comprising:

means for configuring the UE to determine that the first ECP symbol has an uplink transmission direction when each NCP symbol in a subset of NCP symbols has an uplink transmission direction; and

means for determining that the first ECP symbol has a downlink transmission direction when each NCP symbol in the subset of NCP symbols has a downlink transmission direction.

30. The apparatus of claim 27, wherein the slot format is based on a reference subcarrier spacing (SCS) used for the NCP transmission, and wherein the ECP symbols have a different SCS from the reference SCS.

Background

The following relates generally to wireless communications, and more particularly to slot format determination for extended cyclic prefix transmissions using a normal cyclic prefix slot format.

Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be able to support communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). Examples of such multiple-access systems include fourth generation (4G) systems, such as Long Term Evolution (LTE) systems, LTE-advanced (LTE-a) systems, or LTE-a Pro systems, and fifth generation (5G) systems that may be referred to as New Radio (NR) systems. These systems may employ various techniques, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), or discrete Fourier transform spread OFDM (DFT-S-OFDM). A wireless multiple-access communication system may include several base stations or network access nodes, each supporting communication for multiple communication devices simultaneously, which may otherwise be referred to as User Equipment (UE).

Transmissions in wireless communication systems, such as LTE and NR systems, may use a Cyclic Prefix (CP) to provide a guard period at the beginning of each OFDMA symbol that provides protection against multipath delay spread. The CP may be generated by copying an end of a body of the OFDMA symbol to a beginning of the OFDMA symbol such that a frequency domain representation of each delay spread component within a Fast Fourier Transform (FFT) processing window is the same. Both Normal Cp (NCP) length and Extended Cp (ECP) length may be specified in the system, with NCP intended to be sufficient for most scenarios and ECP intended for scenarios with relatively high delay spread. Some wireless communication systems may provide a slot format for NCP and ECP symbols, where there may be fewer ECP symbols in a slot than NCP symbols. Efficient techniques for identifying ECP and NCP symbols within a slot may be desirable to help enhance system efficiency.

SUMMARY

The described technology relates to improved methods, systems, devices, or apparatuses that support slot format determination for extended cyclic prefix transmissions using a normal cyclic prefix slot format. In general, the described techniques provide for slot format determination of Extended Cyclic Prefix (ECP) slots based on a Slot Format Indicator (SFI) for Normal Cyclic Prefix (NCP) slots. In some cases, the slot format may identify the transmission direction of different symbols within the slot (e.g., uplink symbols, downlink symbols, or flexible symbols), and the SFI may provide an indication of the particular slot format to be used. In some cases, SFI may be provided for a slot using NCP symbols, and the start time and end time of each NCP symbol in the slot may be mapped in the time domain to the start time and end time of each ECP symbol in the slot. The transmission direction of each ECP symbol may be determined based at least in part on the transmission direction of at least a portion of at least one NCP symbol that overlaps, completely or partially, the corresponding ECP symbol in the time domain. In some cases, the slot format may be based on a reference subcarrier spacing (SCS) used for NCP transmission, while the ECP symbols have a different SCS from the reference SCS. A method of wireless communication is described. The method can comprise the following steps: identifying, at a UE, a slot format for NCP transmission between the UE and a base station, the slot format indicating a transmission direction for each NCP symbol in a set of NCP symbols within a slot; mapping each set of NCP symbols to a set of ECP symbols using a time domain comparison of each NCP symbol and a start time and an end time of each ECP symbol in the set of ECP symbols, wherein the set of ECP symbols each have a larger cyclic prefix than the NCP symbol; and determining a transmission direction of the corresponding ECP symbol based at least in part on a transmission direction of at least a portion of the at least one NCP symbol that completely or partially overlaps the corresponding ECP symbol in the time domain.

An apparatus for wireless communication is described. The apparatus may include: means for identifying, at a UE, a slot format for NCP transmission between the UE and a base station, the slot format indicating a transmission direction of each NCP symbol in a set of NCP symbols within a slot; means for mapping each NCP symbol to a set of ECP symbols using a time-domain comparison of a start time and an end time of the NCP symbol and each ECP symbol in the set of ECP symbols, wherein the set of ECP symbols each have a larger cyclic prefix than the NCP symbol; and means for determining a transmission direction of a corresponding ECP symbol based at least in part on a transmission direction of at least a portion of the at least one NCP symbol that completely or partially overlaps the corresponding ECP symbol in the time domain.

Another apparatus for wireless communication is described. The apparatus may include a processor, a memory in electronic communication with the processor, and instructions stored in the memory. The instructions are operable to cause a processor to: identifying, at a UE, a slot format for NCP transmission between the UE and a base station, the slot format indicating a transmission direction for each NCP symbol in a set of NCP symbols within a slot; mapping each set of NCP symbols to a set of ECP symbols using a time domain comparison of each NCP symbol and a start time and an end time of each ECP symbol in the set of ECP symbols, wherein the set of ECP symbols each have a larger cyclic prefix than the NCP symbol; and determining a transmission direction of the corresponding ECP symbol based at least in part on a transmission direction of at least a portion of the at least one NCP symbol that completely or partially overlaps the corresponding ECP symbol in the time domain.

A non-transitory computer-readable medium for wireless communication is described. The non-transitory computer-readable medium may include instructions operable to cause a processor to: identifying, at a UE, a slot format for NCP transmission between the UE and a base station, the slot format indicating a transmission direction for each NCP symbol in a set of NCP symbols within a slot; mapping each set of NCP symbols to a set of ECP symbols using a time domain comparison of each NCP symbol and a start time and an end time of each ECP symbol in the set of ECP symbols, wherein the set of ECP symbols each have a larger cyclic prefix than the NCP symbol; and determining a transmission direction of the corresponding ECP symbol based at least in part on a transmission direction of at least a portion of the at least one NCP symbol that completely or partially overlaps the corresponding ECP symbol in the time domain.

In some examples of the above-described methods, apparatus (devices), and non-transitory computer-readable media, the determining may include: identifying a subset of NCP symbols that overlap, in the time domain, with a first ECP symbol of the set of ECP symbols based at least in part on the mapping; and determining that the first ECP symbol may have a flexible transmission direction when at least one NCP symbol in the subset of NCP symbols may have a flexible transmission direction. In some examples of the above-described methods, apparatus (devices), and non-transitory computer-readable media, the determining may further comprise: determining that the first ECP symbol may have an uplink transmission direction when each NCP symbol in the subset of NCP symbols may have an uplink transmission direction; and determining that the first ECP symbol may have a downlink transmission direction when each NCP symbol in the subset of NCP symbols may have a downlink transmission direction.

Some examples of the above-described methods, apparatus (devices), and non-transitory computer-readable media may further include processes, features, devices, or instructions for: an ordered set of transmission directions is identified. Some examples of the above-described methods, apparatus (devices), and non-transitory computer-readable media may further include processes, features, devices, or instructions for: a subset of NCP symbols that completely or partially overlap in the time domain with a first ECP symbol of the set of ECP symbols is identified based at least in part on the mapping. Some examples of the above-described methods, apparatus (devices), and non-transitory computer-readable media may further include processes, features, devices, or instructions for: the transmission direction of the first ECP symbol is determined based on a highest ordered transmission direction of the set of ordered transmission directions within the subset of NCP symbols. In some examples of the above methods, apparatus (devices), and non-transitory computer readable media, the transmission direction indication ECP symbol may have an uplink transmission direction, a downlink transmission direction, or a flexible transmission direction, and wherein the flexible transmission direction may have a highest ordered transmission direction of the set of ordered transmission directions, the downlink transmission direction may have a middle ordered transmission direction of the set of ordered transmission directions, and the uplink transmission direction may have a lowest ordered transmission direction of the set of ordered transmission directions.

In some examples of the above-described methods, apparatus (devices), and non-transitory computer-readable media, the determining may include: identifying a subset of NCP symbols in the time domain that completely or partially overlap with a first ECP symbol in the set of ECP symbols based at least in part on the mapping; determining one or more portions of the first ECP symbol that correspond in the time domain to one or more NCP symbols, or portions thereof, of the subset of NCP symbols; and determining that the transmission direction of the first ECP symbol corresponds to the transmission direction of the NCP symbol for the longest portion of the one or more portions of the first ECP symbol in the time domain.

In some examples of the above methods, apparatus (devices), and non-transitory computer-readable media, the slot format may be based on a reference SCS for NCP transmission, and wherein the ECP symbols may have a different SCS from the reference SCS. In some examples of the above methods, apparatus (devices), and non-transitory computer-readable media, the slot format may be identified based at least in part on a group common physical downlink control channel (GC-PDCCH) transmission received from a base station.

A method of wireless communication is described. The method can comprise the following steps: identifying, at a UE, a slot format for NCP transmission between the UE and a base station, the slot format indicating a transmission direction for each NCP symbol in a set of NCP symbols within a slot; and determining a transmission direction of the corresponding ECP symbol based at least in part on a transmission direction of at least a portion of the at least one NCP symbol that completely or partially overlaps the corresponding ECP symbol in the time domain, wherein a start time and an end time of each NCP symbol is mapped to each ECP symbol in the set of ECP symbols in the time domain.

An apparatus for wireless communication is described. The apparatus may include means for: identifying, at a UE, a slot format for NCP transmission between the UE and a base station, the slot format indicating a transmission direction for each NCP symbol in a set of NCP symbols within a slot; and determining a transmission direction of the corresponding ECP symbol based at least in part on a transmission direction of at least a portion of the at least one NCP symbol that completely or partially overlaps the corresponding ECP symbol in the time domain, wherein a start time and an end time of each NCP symbol is mapped to each ECP symbol in the set of ECP symbols in the time domain.

Another apparatus for wireless communication is described. The apparatus may include a processor, a memory in electronic communication with the processor, and instructions stored in the memory. The instructions are operable to cause a processor to: identifying, at a UE, a slot format for NCP transmission between the UE and a base station, the slot format indicating a transmission direction for each NCP symbol in a set of NCP symbols within a slot; and determining a transmission direction of the corresponding ECP symbol based at least in part on a transmission direction of at least a portion of the at least one NCP symbol that completely or partially overlaps the corresponding ECP symbol in the time domain, wherein a start time and an end time of each NCP symbol is mapped to each ECP symbol in the set of ECP symbols in the time domain.

A non-transitory computer-readable medium for wireless communication is described. The non-transitory computer-readable medium may include instructions operable to cause a processor to: identifying, at a UE, a slot format for NCP transmission between the UE and a base station, the slot format indicating a transmission direction for each NCP symbol in a set of NCP symbols within a slot; and determining a transmission direction of the corresponding ECP symbol based at least in part on a transmission direction of at least a portion of the at least one NCP symbol that completely or partially overlaps the corresponding ECP symbol in the time domain, wherein a start time and an end time of each NCP symbol is mapped to each ECP symbol in the set of ECP symbols in the time domain.

In some examples of the above-described methods, apparatus (devices), and non-transitory computer-readable media, the determining may include: identifying a subset of NCP symbols in the time domain that overlap with a first ECP symbol in the set of ECP symbols; and determining that the first ECP symbol may have a flexible transmission direction when at least one NCP symbol in the subset of NCP symbols may have a flexible transmission direction. In some examples of the above-described methods, apparatus (devices), and non-transitory computer-readable media, the determining may further comprise: determining that the first ECP symbol may have an uplink transmission direction when each NCP symbol in the subset of NCP symbols may have an uplink transmission direction; and determining that the first ECP symbol may have a downlink transmission direction when each NCP symbol in the subset of NCP symbols may have a downlink transmission direction. In some examples of the above-described methods, apparatus (devices), and non-transitory computer-readable media, the determining may further comprise: identifying a set of ordered transmission directions; identifying a subset of NCP symbols in the time domain that completely or partially overlap with a first ECP symbol in the set of ECP symbols; and determining a transmission direction of the first ECP symbol based on a highest ordered transmission direction of the set of ordered transmission directions within the subset of NCP symbols.

In some examples of the above methods, apparatus (devices), and non-transitory computer readable media, the transmission direction may indicate that the ECP symbol has an uplink transmission direction, a downlink transmission direction, or a flexible transmission direction, and wherein the flexible transmission direction has a highest ordered transmission direction in the set of ordered transmission directions, the downlink transmission direction has a middle ordered transmission direction in the set of ordered transmission directions, and the uplink transmission direction has a lowest ordered transmission direction in the set of ordered transmission directions. In some examples of the above-described methods, apparatus (devices), and non-transitory computer-readable media, the determining may further comprise: identifying a subset of NCP symbols in the time domain that completely or partially overlap with a first ECP symbol in the set of ECP symbols; determining one or more portions of the first ECP symbol that correspond in the time domain to one or more NCP symbols, or portions thereof, of the subset of NCP symbols; and determining that the transmission direction of the first ECP symbol corresponds to the transmission direction of the NCP symbol for the longest portion of the one or more portions of the first ECP symbol in the time domain.

In some examples of the above methods, apparatus (devices), and non-transitory computer-readable media, the slot format may be based on a reference subcarrier spacing (SCS) used for NCP transmission, and wherein the ECP symbols have a different SCS from the reference SCS. In some examples of the above methods, apparatus (devices), and non-transitory computer-readable media, the slot format may be identified based at least in part on a group common physical downlink control channel (GC-PDCCH) transmission received from a base station.

A method of wireless communication is described. The method can comprise the following steps: identifying, at a base station, a slot format for NCP transmission between a UE and the base station, the slot format indicating a transmission direction of each NCP symbol in a set of NCP symbols within a slot; transmitting an indication of the slot format to the UE; mapping each set of NCP symbols to a set of ECP symbols using a time domain comparison of each NCP symbol and a start time and an end time of each ECP symbol in the set of ECP symbols, wherein the set of ECP symbols each have a larger cyclic prefix than the NCP symbol; determining a transmission direction of a corresponding ECP symbol based at least in part on a transmission direction of at least a portion of at least one NCP symbol that completely or partially overlaps the corresponding ECP symbol in a time domain; and transmitting one or more ECP symbols to the UE based at least in part on the determination.

An apparatus for wireless communication is described. The apparatus may include: means for identifying, at a base station, a slot format for NCP transmission between a UE and the base station, the slot format indicating a transmission direction of each NCP symbol in a set of NCP symbols within a slot; means for transmitting an indication of the slot format to the UE; means for mapping each NCP symbol to a set of ECP symbols using a time-domain comparison of a start time and an end time of the NCP symbol and each ECP symbol in the set of ECP symbols, wherein the set of ECP symbols each have a larger cyclic prefix than the NCP symbol; means for determining a transmission direction of a corresponding ECP symbol based at least in part on a transmission direction of at least a portion of at least one NCP symbol that completely or partially overlaps the corresponding ECP symbol in the time domain; and means for transmitting one or more ECP symbols to the UE based at least in part on the determination.

Another apparatus for wireless communication is described. The apparatus may include a processor, a memory in electronic communication with the processor, and instructions stored in the memory. The instructions are operable to cause a processor to: identifying, at a base station, a slot format for NCP transmission between a UE and the base station, the slot format indicating a transmission direction of each NCP symbol in a set of NCP symbols within a slot; transmitting an indication of the slot format to the UE; mapping each set of NCP symbols to a set of ECP symbols using a time domain comparison of each NCP symbol and a start time and an end time of each ECP symbol in the set of ECP symbols, wherein the set of ECP symbols each have a larger cyclic prefix than the NCP symbol; determining a transmission direction of a corresponding ECP symbol based at least in part on a transmission direction of at least a portion of at least one NCP symbol that completely or partially overlaps the corresponding ECP symbol in a time domain; and transmitting one or more ECP symbols to the UE based at least in part on the determination.

A non-transitory computer-readable medium for wireless communication is described. The non-transitory computer-readable medium may include instructions operable to cause a processor to: identifying, at a base station, a slot format for NCP transmission between a UE and the base station, the slot format indicating a transmission direction of each NCP symbol in a set of NCP symbols within a slot; transmitting an indication of the slot format to the UE; mapping each set of NCP symbols to a set of ECP symbols using a time domain comparison of each NCP symbol and a start time and an end time of each ECP symbol in the set of ECP symbols, wherein the set of ECP symbols each have a larger cyclic prefix than the NCP symbol; determining a transmission direction of a corresponding ECP symbol based at least in part on a transmission direction of at least a portion of at least one NCP symbol that completely or partially overlaps the corresponding ECP symbol in a time domain; and transmitting one or more ECP symbols to the UE based at least in part on the determination.

In some examples of the above-described methods, apparatus (devices), and non-transitory computer-readable media, the determining may include: identifying a subset of NCP symbols that overlap, in the time domain, with a first ECP symbol of the set of ECP symbols based at least in part on the mapping; and determining that the first ECP symbol may have a flexible transmission direction when at least one NCP symbol in the subset of NCP symbols may have a flexible transmission direction. In some examples of the above-described methods, apparatus (devices), and non-transitory computer-readable media, the determining may further comprise: determining that the first ECP symbol may have an uplink transmission direction when each NCP symbol in the subset of NCP symbols may have an uplink transmission direction; and determining that the first ECP symbol may have a downlink transmission direction when each NCP symbol in the subset of NCP symbols may have a downlink transmission direction.

Some examples of the above-described methods, apparatus (devices), and non-transitory computer-readable media may further include processes, features, devices, or instructions for: an ordered set of transmission directions is identified. Some examples of the above-described methods, apparatus (devices), and non-transitory computer-readable media may further include processes, features, devices, or instructions for: a subset of NCP symbols that completely or partially overlap in the time domain with a first ECP symbol of the set of ECP symbols is identified based at least in part on the mapping. Some examples of the above-described methods, apparatus (devices), and non-transitory computer-readable media may further include processes, features, devices, or instructions for: the transmission direction of the first ECP symbol is determined based on a highest ordered transmission direction of the set of ordered transmission directions within the subset of NCP symbols. In some examples of the above methods, apparatus (devices), and non-transitory computer readable media, the transmission direction indication ECP symbol may have an uplink transmission direction, a downlink transmission direction, or a flexible transmission direction, and wherein the flexible transmission direction may have a highest ordered transmission direction of the set of ordered transmission directions, the downlink transmission direction may have a middle ordered transmission direction of the set of ordered transmission directions, and the uplink transmission direction may have a lowest ordered transmission direction of the set of ordered transmission directions.

In some examples of the above-described methods, apparatus (devices), and non-transitory computer-readable media, the determining may include: identifying a subset of NCP symbols in the time domain that completely or partially overlap with a first ECP symbol in the set of ECP symbols based at least in part on the mapping; determining one or more portions of the first ECP symbol that correspond in the time domain to one or more NCP symbols, or portions thereof, of the subset of NCP symbols; and determining that the transmission direction of the first ECP symbol corresponds to the transmission direction of the NCP symbol for the longest portion of the one or more portions of the time domain of the first ECP symbol.

In some examples of the above methods, apparatus (devices), and non-transitory computer-readable media, the slot format may be based on a reference SCS for NCP transmission, and wherein the ECP symbols may have a different SCS from the reference SCS. In some examples of the above methods, apparatus (devices), and non-transitory computer-readable media, the slot format may be identified based at least in part on a GC-PDCCH transmission received from a base station.

A method of wireless communication is described. The method can comprise the following steps: identifying, at a base station, a slot format for NCP transmission between a UE and the base station, the slot format indicating a transmission direction of each NCP symbol in a set of NCP symbols within a slot; transmitting an indication of the slot format to the UE; determining a transmission direction of a corresponding ECP symbol based at least in part on a transmission direction of at least a portion of at least one NCP symbol that completely or partially overlaps the corresponding ECP symbol in the time domain, wherein a start time and an end time of each NCP symbol are mapped to each ECP symbol in a set of ECP symbols in the time domain; and communicate with the UE based at least in part on the determination.

An apparatus for wireless communication is described. The apparatus may include means for: identifying, at a base station, a slot format for NCP transmission between a UE and the base station, the slot format indicating a transmission direction of each NCP symbol in a set of NCP symbols within a slot; transmitting an indication of the slot format to the UE; determining a transmission direction of a corresponding ECP symbol based at least in part on a transmission direction of at least a portion of at least one NCP symbol that completely or partially overlaps the corresponding ECP symbol in the time domain, wherein a start time and an end time of each NCP symbol are mapped to each ECP symbol in a set of ECP symbols in the time domain; and communicate with the UE based at least in part on the determination.

Another apparatus for wireless communication is described. The apparatus may include a processor, a memory in electronic communication with the processor, and instructions stored in the memory. The instructions are operable to cause a processor to: identifying, at a base station, a slot format for NCP transmission between a UE and the base station, the slot format indicating a transmission direction of each NCP symbol in a set of NCP symbols within a slot; transmitting an indication of the slot format to the UE; determining a transmission direction of a corresponding ECP symbol based at least in part on a transmission direction of at least a portion of at least one NCP symbol that completely or partially overlaps the corresponding ECP symbol in the time domain, wherein a start time and an end time of each NCP symbol are mapped to each ECP symbol in a set of ECP symbols in the time domain; and communicate with the UE based at least in part on the determination.

A non-transitory computer-readable medium for wireless communication is described. The non-transitory computer-readable medium may include instructions operable to cause a processor to: identifying, at a base station, a slot format for NCP transmission between a UE and the base station, the slot format indicating a transmission direction of each NCP symbol in a set of NCP symbols within a slot; transmitting an indication of the slot format to the UE; determining a transmission direction of a corresponding ECP symbol based at least in part on a transmission direction of at least a portion of at least one NCP symbol that completely or partially overlaps the corresponding ECP symbol in a time domain, wherein a start time and an end time of each NCP symbol are mapped to each ECP symbol in a set of ECP symbols in the time domain; and communicate with the UE based at least in part on the determination.

In some examples of the above-described methods, apparatus (devices), and non-transitory computer-readable media, the configuring may include: configuring the UE to identify a subset of NCP symbols that overlap, in the time domain, with a first ECP symbol of the set of ECP symbols; and configuring the UE to determine that the first ECP symbol has a flexible transmission direction when at least one NCP symbol in the subset of NCP symbols has a flexible transmission direction. In some examples of the above-described methods, apparatus (devices), and non-transitory computer-readable media, the configuring may include: configuring the UE to determine that the first ECP symbol has an uplink transmission direction when each NCP symbol in the subset of NCP symbols has an uplink transmission direction; and configuring the UE to determine that the first ECP symbol has a downlink transmission direction when each NCP symbol in the subset of NCP symbols has a downlink transmission direction. In some examples of the above-described methods, apparatus (devices), and non-transitory computer-readable media, the configuring may include: configuring a UE to identify a set of ordered transmission directions; configuring the UE to identify a subset of NCP symbols that overlap in the time domain with a first ECP symbol of a second set of ECP symbols; and configuring the UE to determine a transmission direction of the first ECP symbol based on a highest ordered transmission direction of the set of ordered transmission directions within the subset of NCP symbols.

In some examples of the above methods, apparatus (devices), and non-transitory computer readable media, the transmission direction may indicate that the ECP symbol has an uplink transmission direction, a downlink transmission direction, or a flexible transmission direction, and wherein the flexible transmission direction has a highest ordered transmission direction in the set of ordered transmission directions, the downlink transmission direction has a middle ordered transmission direction in the set of ordered transmission directions, and the uplink transmission direction has a lowest ordered transmission direction in the set of ordered transmission directions. In some examples of the above-described methods, apparatus (devices), and non-transitory computer-readable media, the configuring may include: configuring the UE to identify a subset of NCP symbols that overlap in the time domain with a first ECP symbol of the second set of ECP symbols; configuring the UE to determine one or more portions of the first ECP symbol in the time domain corresponding to one or more NCP symbols, or portions thereof, of the subset of NCP symbols; and configuring the UE to determine that the transmission direction of the first ECP symbol corresponds to the transmission direction of the NCP symbol for the longest portion of the one or more portions of the time domain of the first ECP symbol. In some examples of the above methods, apparatus (devices), and non-transitory computer-readable media, the slot format may be based on a reference subcarrier spacing (SCS) used for NCP transmission, and wherein the ECP symbols have a different SCS from the reference SCS. In some examples of the above methods, apparatus (devices), and non-transitory computer-readable media, the slot format is identified based at least in part on a group common physical downlink control channel (GC-PDCCH) transmission received from the base station.