180 and the UE 104 may each include a plurality of antennas, such as antenna elements, antenna panels, and/or antenna arrays to facilitate the beamforming.

In some cases, base station 180 may transmit a beamformed signal to UE 104 in one or more transmit directions 182′. UE 104 may receive the beamformed signal from the base station 180 in one or more receive directions 182″. UE 104 may also transmit a beamformed signal to the base station 180 in one or more transmit directions 182″. Base station 180 may receive the beamformed signal from UE 104 in one or more receive directions 182′. Base station 180 and UE 104 may then perform beam training to determine the best receive and transmit directions for each of base station 180 and UE 104. Notably, the transmit and receive directions for base station 180 may or may not be the same. Similarly, the transmit and receive directions for UE 104 may or may not be the same.

As described herein, dynamic processing timeline adaptation may be implemented to enable communications using higher-frequency bands, including mmWave bands in FR4.

Aspects Related to Adapting Processing Timelines for High Frequency Wireless Communications

Aspects described herein relate to dynamic processing timeline adaptation in which a user equipment may select (and a base station may configure) different processing timelines depending on conditions and/or signaling between the user equipment and the base station.

Processing timelines, as described herein, may broadly refer to various types of control and data processing. For example, PDSCH processing timelines and PUSCH preparation timelines are generally described in Section 5.3 and 6.4, respectively, of the 3GPP technical specification (TS) 38.214. As an example, an “N1” timeline determines the minimum time interval between a PDSCH and an associated HARQ-ACK feedback.

As an example of a condition (or configuration) that may be used to determine a processing timeline, a user equipment may be configured with per-slot control channel monitoring (e.g., PDCCH monitoring) or multi-slot control channel monitoring. In various aspects, if the user equipment is configured or operating with per-slot control channel monitoring (e.g., a first condition or configuration), then a first processing timeline is applied. In the alternative, if the user equipment is configured or operating with multi-slot control channel monitoring (e.g., a second condition or configuration), then a second processing timeline is applied, where the second processing timeline is different than the first processing timeline (e.g., the second processing timeline may be longer than the first processing timeline).

In the case of multi-slot control channel monitoring, a processing timeline may further be differentiated based on the configured periodicity of control channel monitoring occasions. For example, where the periodicity of multi-slot control channel monitoring is shorter, the processing timeline may be shorter, and vice versa.

As an example of signaling that may be used to determine a processing timeline, when a user equipment is configured with multi-TTI DL/UL scheduling, the user equipment may determine the number of scheduled TTIs (e.g., PDSCHs/PUSCHs) based on scheduling DCI (signaling), such as DCI field value(s), DCI format(s), monitoring occasions, and the like. For example, if the scheduling DCI indicates N TTIs, then the processing timeline may be based on the value of N. For example, if N is less than or equal to a certain threshold (e.g., 1), a first processing timeline is applied, otherwise, a second processing timeline is applied, where the second processing timeline is longer than the first processing timeline.

In order to enable the adaptive processing timelines, a user equipment may report a plurality of configured or possible processing timelines to the network, such as in a user equipment capability report. The processing timelines may generally be defined by one or more processing parameters, which may be reported in one or more tables in some examples. Examples of processing parameters that may be associated with a processing timeline, include: a physical downlink shared channel (PDSCH) processing time; a physical uplink shared channel (PUSCH) preparation time; a physical downlink control channel (PDCCH) processing time; a downlink or uplink scheduling offset; a channel state information (CSI) processing time; a beam switching delay (e.g., for bandwidth part (BWP) switching); and a radio frequency retuning delay, to name a few, but others are possible.

A user equipment may further include conditions (or configurations) that correspond with the configured processing timelines when reporting its processing timelines to the network. In this way, the network and the user equipment have a shared understanding and expectation with regard to the dynamic application of various processing timelines based on conditions and configurations without explicit signaling.

Further, the network (e.g., a base station communicating with a user equipment) may configure different sets of processing timelines parameters through signaling (e.g., radio resource control (RRC) signaling) associated with the processing timeline, and may thereafter apply a corresponding set of parameters to communications depending on a condition or signaling (as with the user equipment).

For example, the network may configure multiple sets of downlink/uplink time domain resource allocation (TDRA) lists corresponding to different conditions or processing timelines. In some examples, the TDRA lists may include parameter values, such as K0, K1, and K2 values. Generally, a K0 value defines an offset between a downlink slot in which a PDCCH downlink control information for downlink scheduling is received and a downlink slot in which PDSCH data is scheduled; a K1 value defines an offset between the downlink slot in which the PDSCH data is scheduled and an uplink slot in which a HARQ-ACK feedback for the PDSCH data needs to be sent; and a K2 value defines an offset between the downlink slot in which the PDCCH downlink control information for downlink scheduling is received and an uplink slot in which uplink data needs to be sent on a PUSCH.

When the network has configured different sets of processing parameters, the first set may generally be configured to comply with a first processing timeline, and the second set may be configured to comply with the second processing timeline.

Alternatively, the network may configure a single set of parameters and apply some restriction on the applicable values/ranges. For example, if a single set of downlink/uplink TDRA lists is configured and the first processing timeline is applied, the network and user equipment do not expect any entries of the TDRA lists that do not comply with the first processing timeline to be indicated by a scheduling DCI.

As another example, if the PDCSH processing time of the first processing timeline is N1, then the user equipment does not expect to be indicated with a K1 value (slots) whose length is smaller than N1 value (symbols). Note that these values may be converted to a common time domain (e.g., slots or symbols) prior to comparison.

FIG. 6 depicts an example flow 600 between a base station 602 and a user equipment 604 for adaptively configuring processing timelines.

As depicted, base station 602 (e.g., a base station such as 102 in FIGS. 1 and 2) is in data communications with user equipment 604 (e.g., a user equipment such as 104 in FIGS. 1 and 2) via a Uu interface. In this example, base station 602 and user equipment 604 may be conducting high-frequency communications, such as communications in frequency range 4 (FR4), as described above.

At 606, user equipment 604 may optionally transmit a capability report to base station 602. In some aspects, the capability report may define a plurality of processing timelines that user equipment 604 is capable of implementing or applying. In some cases, each processing timeline may be defined in terms of one or more processing parameters, including a physical downlink shared channel (PDSCH) processing time; a physical uplink shared channel (PUSCH) preparation time; a physical downlink control channel (PDCCH) processing time; a downlink or uplink scheduling offset; a channel state information (CSI) processing time; a beam switching delay (e.g., for bandwidth part (BWP) switching); and a radio frequency retuning delay, and others.

In some cases, user equipment 604 may further include conditions (or configurations) that correspond with the processing timelines so that base station 602 has knowledge of when the processing timelines will be applied based on the conditions (or configurations).

At 608, base station 602 may optionally configure user equipment 604 with a plurality of processing timelines, or with parameters related to the processing timelines reported to base station 602, which may include parameters such as those described above (e.g., TDRA lists associated with different processing timelines).

At 610, base station 602 may optionally transmit configuration signaling to user equipment 604. For example, base station 602 may configure multi-slot or per-slot control channel monitoring (e.g., PDCCH), multi-TTI or single-TTI downlink and uplink scheduling, as well as other monitoring and scheduling configurations.

At 612, user equipment 604 determines a condition (or configuration) of its current operation. For example, the condition may relate to monitoring (e.g., per-slot or multi-slot control channel monitoring) or scheduling (e.g., single-TTI or multi-TTI downlink and uplink scheduling). Further, user equipment 604 may determine a received signal at 612, which may include configuration signaling from base station 602, such as an explicit signaling messaging configuring the monitoring or scheduling modes for user equipment 604.

Note that because user equipment 604 may already be operating according to a condition (e.g., monitoring or scheduling), user equipment 604 may therefore determine a condition at 612 without explicit signaling from base station 602.

At 614, user equipment 604 may optionally signal a condition (such as a monitoring or scheduling condition) to base station 602, which base station 602 may use to determine a processing timeline being used by user equipment 604. For example, base station 602 may make this determination based on processing timeline parameters defined in the capability report it receives at 606, or based on its own processing timeline parameters sent at 608.

Based on the user equipment's determination at 612, the user equipment selects a processing timeline at 616. The processing timeline may be selected from a plurality of configured processing timelines, such as those indicated to base station 602 in the capability report at 606, and/or those configured by base station 602 in with processing timeline parameters at 608.

At 618, user equipment 604 receives a data transmission from base station 602. The data transmission at 618 could include control channel data (e.g., PDCCH data), shared channel data (e.g., PDSCH data), or other types of data.

At 620, user equipment 604 processes the received data according to the selected processing timeline (e.g., selected at step 616).

At 622, user equipment 604 transmits an acknowledgement (e.g., a Hybrid Automatic Repeat Request (HARD) acknowledgment) to base station 602. In some cases, the timing of the acknowledgement may be based on the selected processing timeline, and base station 602 may process the acknowledgment based on that timeline.

Example Method for Adapting Processing Timelines by a User Equipment

FIG. 7 depicts an example method 700 for wireless communication by a user equipment. In some cases, method 700 may be performed by a user equipment, such as user equipment 104 in FIGS. 1 and 2. In some cases, the adaptive processing timeline component 198 and 281, of FIGS. 1 and 2, respectively, may be configured to perform various aspects of method 700.

Method 700 begins at step 710 with selecting one of a first processing timeline or a second processing timeline based on one of: a monitoring condition; a scheduling condition; or a signaling received from a base station.

Method 700 then proceeds to step 720 with processing data according to the selected one of the first processing timeline or a second processing timeline. Generally, the first processing timeline and the second processing timeline are different. For example, in some cases, the first processing timeline is shorter than the second processing timeline.

In some aspects, method 700 further includes receiving the data from the base station for processing on a high-frequency band, such as an FR4 frequency band.

In some aspects, the first processing timeline is defined by one or more processing parameters and one or more corresponding first processing timeline parameter values for the one or more processing parameters, the second processing timeline are defined by the one or more processing parameters, and one or more corresponding second processing timeline parameter values for the one or more processing parameters, and at least one of the one or more corresponding first processing timeline parameter values is different than a corresponding one of the one or more corresponding second processing timeline parameter values (e.g., a particular parameter has a different parameter value for the first processing timeline than the second processing timeline, such as a different time value).

In some aspects, the one or more processing parameters comprise one or more of: a physical downlink shared channel (PDSCH) processing time; a physical uplink shared channel (PUSCH) preparation time; a physical downlink control channel (PDCCH) processing time; a downlink or uplink scheduling offset; a channel state information (CSI) processing time; a beam switching delay; or a radio frequency retuning delay.

In some aspects, selecting one of the first processing timeline or the second processing timeline is based on a monitoring condition. In such cases, the monitoring condition may comprise a physical downlink control channel (PDCCH) monitoring condition, and the PDCCH monitoring condition determines whether the user equipment is configured or operating in a per-slot PDCCH monitoring mode or a multi-slot PDCCH monitoring mode. In such cases, the user equipment may be configured to select the first processing timeline in the per-slot PDCCH monitoring mode, and the user equipment may be further configured to select the second processing timeline in the multi-slot PDCCH monitoring mode.

In some aspects, the user equipment is configured or operating in a multi-slot PDCCH monitoring mode, and method 700 further includes selecting one of the first processing timeline or the second processing timeline further based on a periodicity of the multi-slot PDCCH monitoring mode.

In some aspects, selecting one of the first processing timeline or the second processing timeline is based on a signaling received from the base station. In such cases, the scheduling condition may comprise a physical downlink shared channel (PDSCH) or physical uplink shared channel (PUSCH) scheduling condition, and the PDSCH or PUSCH scheduling condition determines whether the user equipment is configured or operating in a single transmit time interval (TTI) PDSCH or PUSCH scheduling mode or a multi-TTI PDSCH or PUSCH scheduling mode. In such cases, the user equipment may be configured to select the first processing timeline in the single-TTI PDSCH or PUSCH scheduling mode, and the user equipment may further be configured to select the second processing timeline in the multi-TTI PDSCH or PUSCH scheduling mode.

In some aspects, the user equipment is configured or operating in a multi-TTI PDSCH or PUSCH scheduling mode, and method 700 further includes selecting one of the first processing timeline or the second processing timeline further based on a number of the TTIs associated with the multi-TTI PDSCH or PUSCH scheduling mode.

In some aspects, selecting one of the first processing timeline or the second processing timeline is based on a monitoring condition. In such cases, the signaling received from the base station may determine a transmission time interval configuration for the user equipment. For example, the signaling received from the base station may comprise downlink control information (DCI). In such cases, method 700 may further include determining a number of transmission time intervals for the transmission time interval configuration based on the DCI (e.g., the number of total transmission time intervals that are simultaneously scheduled); and selecting one of the first processing timeline or the second processing timeline further based on whether the number of transmission time intervals exceeds a threshold. In some aspects, method 700 may further include selecting the second processing timeline if the number of transmission time intervals exceeds the threshold; and selecting the first processing timeline if the number of transmission time intervals is less than or equal to the threshold. In some aspects, the threshold is 1.

In some aspects, where the signaling received from the base station comprises DCI, the DCI may include at least one of: a DCI field values indicating the number of transmission time intervals; a DCI format indicating the number of transmission time intervals; or a number of monitoring occasions indicating the number of transmission time intervals.

In some aspects, method 700 may further include sending a capability report to the base station, such as described with respect to 606 of FIG. 6. In various aspects, the capability report defines: the one or more first processing timeline parameter values corresponding to the one or more processing parameters defining the first processing timeline; and the one or more second processing timeline parameter values corresponding to the one or more processing parameters defining the second processing timeline.

In some aspects, method 700 may further include transmitting at least one of the monitoring condition or the scheduling condition to a base station, wherein the at least one of the monitoring condition or the scheduling condition indicates which of the first processing timeline or the second processing timeline is in use by the user equipment.

In some aspects, method 700 may further include receiving the one or more first processing timeline parameter values from the base station via radio resource control signaling; and receiving the one or more second processing timeline parameter values from the base station via radio resource control signaling. In some cases, the one or more first processing timeline parameter values and the one or more second processing timeline parameter values are defined in a plurality of sets of time domain resource allocations (TDRA) lists. In various aspects, each set of TDRA lists of the plurality of sets of TDRA lists comprises at least: a K0 value defining an offset between a downlink slot in which a PDCCH downlink control information for downlink scheduling is received and a downlink slot in which PDSCH data is scheduled; a K1 value defining an offset between the downlink slot in which the PDSCH data is scheduled and an uplink slot in which a HARQ-ACK feedback for the PDSCH data needs to be sent; and a K2 value defining an offset between the downlink slot in which the PDCCH downlink control information for downlink scheduling is received and an uplink slot in which uplink data needs to be sent on a PUSCH.

In some aspects, the one or more first processing timeline parameter values and the one or more second processing timeline parameter values are defined in a single set of time domain resource allocations (TDRA) lists, which may include the aforementioned K0, K1, and K2 values.

In some aspects, K1 is larger than or equal to a minimum offset between a PDSCH data transmission on a downlink and a HARQ-ACK feedback on an uplink, wherein the minimum offset is determined by the one or more processing parameters.

In some aspects, K2 is larger than or equal to a minimum offset between a PDCCH transmission on a downlink and a PUSCH transmission on an uplink, wherein the minimum offset is determined by the one or more processing parameters.

Note that FIG. 7 is just one example of a method, and other methods including fewer, additional, or alternative steps are possible consistent with this disclosure.

Example Method for Adapting Processing Timelines by a User Equipment

FIG. 8 depicts an example method 800 for wireless communication by a network. In some cases, method 800 may be performed by a network entity, such as base station 102 in FIGS. 1 and 2. In some cases, the adaptive processing timeline component 199 and 241, of FIGS. 1 and 2, respectively, may be configured to perform various aspects of method 800.

Method 800 begins at step 810 with determining a processing timeline for a user equipment.

Method 800 then proceeds to step 820 with processing data from the user equipment according to the determined timeline.

In some aspects, determining a processing timeline for the user equipment comprises one of: receiving a capability report from a user equipment defining at least a first processing timeline and a second processing timeline for the user equipment; or transmitting a processing timeline configuration to the user equipment defining at least the first processing timeline and the second processing timeline for the user equipment.

In some aspects, the first processing timeline is defined by one or more processing parameters and one or more corresponding first processing timeline parameter values for the one or more processing parameters, the second processing timeline are defined by the one or more processing parameters, and one or more corresponding second processing timeline parameter values for the one or more processing parameters, at least one of the one or more corresponding first processing timeline parameter values is different than a corresponding one of the one or more corresponding second processing timeline parameter values, and the first processing timeline is shorter than the second processing timeline.

In some aspects, method 800 further includes transmitting to the user equipment one or more values corresponding to one or more of the first processing timeline parameter values and the second processing timeline parameter values in the processing timeline configuration.

In some aspects, method 800 further includes transmitting to the user equipment the one or more values in radio resource control (RRC) signaling.

In some aspects, the one or more values are defined in a plurality of sets of time domain resource allocations (TDRA) lists. For example, each set of TDRA lists of the plurality of sets of TDRA lists comprises at least: a K0 value defining an offset between a downlink slot in which a PDCCH downlink control information for downlink scheduling is received and a downlink slot in which PDSCH data is scheduled; a K1 value defining an offset between the downlink slot in which the PDSCH data is scheduled and an uplink slot in which a HARQ-ACK feedback for the PDSCH data needs to be sent; and a K2 value defining an offset between the downlink slot in which the PDCCH downlink control information for downlink scheduling is received and an uplink slot in which uplink data needs to be sent on a PUSCH.

In some aspects, the one or more values are defined in a single set of time domain resource allocations (TDRA) lists, which may include the aforementioned parameters for K0, K1, and K2.

In some aspects, K1 is larger than or equal to a minimum offset between a PDSCH data transmission on a downlink and a HARQ-ACK feedback on an uplink, wherein the minimum offset is determined by the one or more processing parameters.

In some aspects, K2 is larger than or equal to a minimum offset between a PDCCH transmission on a downlink and a PUSCH transmission on an uplink, wherein the minimum offset is determined by the one or more processing parameters.

In some aspects, method 800 further includes transmitting signaling to the user equipment configured to configure a transmission time interval for the user equipment.

In some aspects, the signaling transmitted to the user equipment comprises downlink control information (DCI) configured to be used by the user equipment to: determine a number of transmission time intervals for the transmission time interval configuration based on the DCI; and select one of the first processing timeline or the second processing timeline further based on whether the number of transmission time intervals exceeds a threshold. In some cases, the threshold is 1.

In some aspects, method 800 further includes receiving at least one of a monitoring condition or a scheduling condition from the user equipment, wherein the at least one of the monitoring condition or the scheduling condition indicates which of the first processing timeline or the second processing timeline is in use by the user equipment.

In some aspects, method 800 further includes transmitting configuration signaling to the user equipment, wherein the configuration signaling is configured to cause the user equipment to enter one or more of a monitoring mode or a scheduling mode.

In some aspects, method 800 further includes determining that the user equipment is operating in one of the first processing timeline or second processing timeline based on the configuration signaling.

In some aspects, method 800 further includes transmitting data to the user equipment for processing by the user equipment, wherein processing data from the user equipment according to the determined timeline comprises processing an acknowledgement from the user equipment in accordance with one of the first processing timeline or second processing timeline for the user equipment defined in the capability report.

Note that FIG. 8 is just one example of a method, and other methods including fewer, additional, or alternative steps are possible consistent with this disclosure.

Example Wireless Communication Devices

FIG. 9 depicts an example communications device 900 that includes various components operable, configured, or adapted to perform operations for the techniques disclosed herein, such as the operations depicted and described with respect to FIGS. 6-7. In some examples, communication device 900 may be a user equipment 104 as described, for example with respect to FIGS. 1 and 2.

Communications device 900 includes a processing system 902 coupled to a transceiver 908 (e.g., a transmitter and/or a receiver). Transceiver 908 is configured to transmit (or send) and receive signals for the communications device 900 via an antenna 910, such as the various signals as described herein. Processing system 902 may be configured to perform processing functions for communications device 900, including processing signals received and/or to be transmitted by communications device 900.

Processing system 902 includes one or more processors 920 coupled to a computer-readable medium/memory 920 via a bus 906. In certain aspects, computer-readable medium/memory 920 is configured to store instructions (e.g., computer-executable code) that when executed by the one or more processors 920, cause the one or more processors 920 to perform the operations illustrated in FIGS. 6-7, or other operations for performing the various techniques discussed herein for dynamically adapting processing timelines.

In the depicted example, computer-readable medium/memory 930 stores: code 931 for selecting a processing timeline; code 932 for processing data according to a processing timeline; code 933 for enabling a monitoring mode; code 934 for enabling a scheduling mode; code 935 for receiving; and code 936 for transmitting.

In the depicted example, the one or more processors 920 include: circuitry 921 for selecting a processing timeline; circuitry 922 for processing data according to a processing timeline; circuitry 923 for enabling a monitoring mode; circuitry 924 for enabling a scheduling mode; circuitry 925 for receiving; and circuitry 926 for transmitting.

Various components of communications device 900 may provide means for performing the methods described herein, including with respect to FIGS. 6-7.

In some examples, means for transmitting or sending (or means for outputting for transmission) may include the transceivers 254 and/or antenna(s) 252 of the user equipment 104 illustrated in FIG. 2 and/or transceiver 908 and antenna 910 of the communication device 900 in FIG. 9.

In some examples, means for receiving (or means for obtaining) may include the transceivers 254 and/or antenna(s) 252 of the user equipment 104 illustrated in FIG. 2 and/or transceiver 908 and antenna 910 of the communication device 900 in FIG. 9.

In some examples, means for performing method 700 may include various processing system components, such as: the one or more processors 920 in FIG. 9, or aspects of the user equipment 104 depicted in FIG. 2, including receive processor 258, transmit processor 264, TX MIMO processor 266, and/or controller/processor 280 (including adaptive processing timeline component 281).

Notably, FIG. 9 is just one example, and many other examples and configurations of communication device 900 are possible.

FIG. 10 depicts an example communications device 1000 that includes various components operable, configured, or adapted to perform operations for the techniques disclosed herein, such as the operations depicted and described with respect to FIGS. 6 and 8. In some examples, communication device 1000 may be a base station 102 as described, for example with respect to FIGS. 1 and 2.

Communications device 1000 includes a processing system 1002 coupled to a transceiver 1008 (e.g., a transmitter and/or a receiver). Transceiver 1008 is configured to transmit (or send) and receive signals for the communications device 1000 via an antenna 1010, such as the various signals as described herein. Processing system 1002 may be configured to perform processing functions for communications device 1000, including processing signals received and/or to be transmitted by communications device 1000.

Processing system 1002 includes one or more processors 1020 coupled to a computer-readable medium/memory 1020 via a bus 1006. In certain aspects, computer-readable medium/memory 1020 is configured to store instructions (e.g., computer-executable code) that when executed by the one or more processors 1020, cause the one or more processors 1020 to perform the operations illustrated in FIGS. 6 and 8, or other operations for performing the various techniques discussed herein for dynamically adapting processing timelines.

In the depicted example, computer-readable medium/memory 1030 stores: code 1031 for determining a processing timeline; code 1032 for processing data according to a processing timeline; code 1033 for transmitting; and code 1034 for receiving.

In the depicted example, the one or more processors 1020 include: circuitry 1021 for determining a processing timeline; circuitry 1022 for processing data according to a processing timeline; circuitry 1023 for transmitting; and circuitry 1024 for receiving.

Various components of communications device 1000 may provide means for performing the methods described herein, including with respect to FIGS. 6 and 8.

In some examples, means for transmitting or sending (or means for outputting for transmission) may include the transceivers 232 and/or antenna(s) 234 of the base station 102 illustrated in FIG. 2 and/or transceiver 1008 and antenna 1010 of the communication device 1000 in FIG. 10.

In some examples, means for receiving (or means for obtaining) may include the transceivers 232 and/or antenna(s) 234 of the base station illustrated in FIG. 2 and/or transceiver 1008 and antenna 1010 of the communication device 1000 in FIG. 10.

In some examples, means for performing method 800 may include various processing system components, such as: the one or more processors 1020 in FIG. 10, or aspects of the base station 102 depicted in FIG. 2, including receive processor 238, transmit processor 220, TX MIMO processor 230, and/or controller/processor 240 (including adaptive processing timeline component 241).

Notably, FIG. 10 is just one example, and many other examples and configurations of communication device 1000 are possible.

Example Clauses

Implementation examples are described in the following numbered clauses:

- Clause 1: A method of wireless communication by a user equipment, comprising: selecting one of a first processing timeline or a second processing timeline based on one of: a monitoring condition; a scheduling condition; or a signaling received from a base station; and processing data according to the selected one of the first processing timeline or the second processing timeline.
- Clause 2: The method of Clause 1, wherein: the first processing timeline is defined by one or more processing parameters and one or more corresponding first processing timeline parameter values for the one or more processing parameters, the second processing timeline are defined by the one or more processing parameters, and one or more corresponding second processing timeline parameter values for the one or more processing parameters, at least one of the one or more corresponding first processing timeline parameter values is different than a corresponding one of the one or more corresponding second processing timeline parameter values, and the first processing timeline is shorter than the second processing timeline.
- Clause 3: The method of Clause 2, wherein the one or more processing parameters comprise one or more of: a physical downlink shared channel (PDSCH) processing time; a physical uplink shared channel (PUSCH) preparation time; a physical downlink control channel (PDCCH) processing time; a downlink or uplink scheduling offset; a channel state information (CSI) processing time; a beam switching delay; or a radio frequency retuning delay.
- Clause 4: The method of Clause 2, wherein selecting one of the first processing timeline or the second processing timeline is based on a monitoring condition, and the monitoring condition comprises a physical downlink control channel (PDCCH) monitoring condition.
- Clause 5: The method of Clause 4, wherein: the PDCCH monitoring condition determines whether the user equipment is configured or operating in a per-slot PDCCH monitoring mode or a multi-slot PDCCH monitoring mode, the user equipment is configured to select the first processing timeline in the per-slot PDCCH monitoring mode, and the user equipment is configured to select the second processing timeline in the multi-slot PDCCH monitoring mode.
- Clause 6: The method of Clause 5, wherein: the user equipment is configured or operating in a multi-slot PDCCH monitoring mode, and the method further comprises selecting one of the first processing timeline or the second processing timeline further based on a periodicity of the multi-slot PDCCH monitoring mode.
- Clause 7: The method of Clause 2, wherein selecting one of the first processing timeline or the second processing timeline is based on a signaling received from the base station, and the scheduling condition comprises a physical downlink shared channel (PDSCH) or physical uplink shared channel (PUSCH) scheduling condition.
- Clause 8: The method of Clause 7, wherein: the PDSCH or PUSCH scheduling condition determines whether the user equipment is configured or operating in a single transmit time interval (TTI) PDSCH or PUSCH scheduling mode or a multi-TTI PDSCH or PUSCH scheduling mode, the user equipment is configured to select the first processing timeline in the single-TTI PDSCH or PUSCH scheduling mode, and the user equipment is configured to select the second processing timeline in the multi-TTI PDSCH or PUSCH scheduling mode.
- Clause 9: The method of claim 8, wherein: the user equipment is configured or operating in a multi-TTI PDSCH or PUSCH scheduling mode, and the method further comprises selecting one of the first processing timeline or the second processing timeline further based on a number of the TTIs associated with the multi-TTI PDSCH or PUSCH scheduling mode.
- Clause 10: The method of Clause 2, wherein selecting one of the first processing timeline or the second processing timeline is based on a monitoring condition, and the signaling received from the base station determines a transmission time interval configuration for the user equipment.
- Clause 11: The method of Clause 10, wherein: the signaling received from the base station comprises downlink control information (DCI), and the method further comprises: determining a number of transmission time intervals for the transmission time interval configuration based on the DCI; and selecting one of the first processing timeline or the second processing timeline further based on whether the number of transmission time intervals exceeds a threshold.
- Clause 12: The method of Clause 11, further comprising: selecting the second processing timeline if the number of transmission time intervals exceeds the threshold; and selecting the first processing timeline if the number of transmission time intervals is less than or equal to the threshold.
- Clause 13: The method of Clause 12, wherein the threshold is 1.
- Clause 14: The method of Clause 10, wherein the DCI comprises at least one of: a DCI field values indicating the number of transmission time intervals; a DCI format indicating the number of transmission time intervals; or a number of monitoring occasions indicating the number of transmission time intervals.
- Clause 15: The method of any one of Clauses 2-14, further comprising: sending a capability report to the base station, wherein the capability report defines: the one or more first processing timeline parameter values corresponding to the one or more processing parameters defining the first processing timeline; and the one or more second processing timeline parameter values corresponding to the one or more processing parameters defining the second processing timeline.
- Clause 16: The method of any one of Clauses 2-15, wherein: selecting one of the first processing timeline or the second processing timeline is based on one of the monitoring condition or the scheduling condition, and the method further comprises transmitting at least one of the monitoring condition or the scheduling condition to a base station, wherein the at least one of the monitoring condition or the scheduling condition indicates which of the first processing timeline or the second processing timeline is in use by the user equipment.
- Clause 17: The method of any one of Clauses 2-16, further comprising: receiving the one or more first processing timeline parameter values from the base station via radio resource control signaling; and receiving the one or more second processing timeline parameter values from the base station via radio resource control signaling.
- Clause 18: The method of Clause 17, wherein the one or more first processing timeline parameter values and the one or more second processing timeline parameter values are defined in a plurality of sets of time domain resource allocations (TDRA) lists.
- Clause 19: The method of Clause 18, wherein each set of TDRA lists of the plurality of sets of TDRA lists comprises at least: a K0 value defining an offset between a downlink slot in which a PDCCH downlink control information for downlink scheduling is received and a downlink slot in which PDSCH data is scheduled; a K1 value defining an offset between the downlink slot in which the PDSCH data is scheduled and an uplink slot in which a HARQ-ACK feedback for the PDSCH data needs to be sent; and a K2 value defining an offset between the downlink slot in which the PDCCH downlink control information for downlink scheduling is received and an uplink slot in which uplink data needs to be sent on a PUSCH.
- Clause 20: The method of Clause 17, wherein the one or more first processing timeline parameter values and the one or more second processing timeline parameter values are defined in a single set of time domain resource allocations (TDRA) lists.
- Clause 21: The method of Clause 20, wherein the set of TDRA lists comprises at least: a K0 value defining an offset between a downlink slot in which a PDCCH downlink control information for downlink scheduling is received and a downlink slot in which PDSCH data is scheduled; a K1 value defining an offset between the downlink slot in which the PDSCH data is scheduled and an uplink slot in which a HARQ-ACK feedback for the PDSCH data needs to be sent; and a K2 value defining an offset between the downlink slot in which the PDCCH downlink control information for downlink scheduling is received and an uplink slot in which uplink data needs to be sent on a PUSCH.
- Clause 22: The method of Clause 21, wherein K1 is larger than or equal to a minimum offset between a PDSCH data transmission on a downlink and a HARQ-ACK feedback on an uplink, wherein the minimum offset is determined by the one or more processing parameters.
- Clause 23: The method of Clause 21, wherein K2 is larger than or equal to a minimum offset between a PDCCH transmission on a downlink and a PUSCH transmission on an uplink, wherein the minimum offset is determined by the one or more processing parameters.
- Clause 24: The method of any one of Clauses 2-23, further comprising receiving the data from the base station for processing on an FR4 frequency band.
- Clause 25: A method for wireless communication by a base station, comprising: determining a processing timeline for a user equipment; and processing data from the user equipment according to the determined processing timeline.
- Clause 26: The method of Clause 25, wherein: determining a processing timeline for the user equipment comprises one of: receiving a capability report from a user equipment defining at least a first processing timeline and a second processing timeline for the user equipment; or transmitting a processing timeline configuration to the user equipment defining at least the first processing timeline and the second processing timeline for the user equipment, the first processing timeline is defined by one or more processing parameters and one or more corresponding first processing timeline parameter values for the one or more processing parameters, the second processing timeline are defined by the one or more processing parameters, and one or more corresponding second processing timeline parameter values for the one or more processing parameters, at least one of the one or more corresponding first processing timeline parameter values is different than a corresponding one of the one or more corresponding second processing timeline parameter values, and the first processing timeline is shorter than the second processing timeline.
- Clause 27: The method of Clause 26, further comprising transmitting to the user equipment one or more values corresponding to one or more of the first processing timeline parameter values and the second processing timeline parameter values in the processing timeline configuration.
- Clause 28: The method of Clause 27, further comprising transmitting to the user equipment the one or more values in radio resource control (RRC) signaling.
- Clause 29: The method of Clause 27, wherein the one or more values are defined in a plurality of sets of time domain resource allocations (TDRA) lists.
- Clause 30: The method of Clause 29, wherein each set of TDRA lists of the plurality of sets of TDRA lists comprises at least: a K0 value defining an offset between a downlink slot in which a PDCCH downlink control information for downlink scheduling is received and a downlink slot in which PDSCH data is scheduled; a K1 value defining an offset between the downlink slot in which the PDSCH data is scheduled and an uplink slot in which a HARQ-ACK feedback for the PDSCH data needs to be sent; and a K2 value defining an offset between the downlink slot in which the PDCCH downlink control information for downlink scheduling is received and an uplink slot in which uplink data needs to be sent on a PUSCH.
- Clause 31: The method of Clause 27, wherein the one or more values are defined in a single set of time domain resource allocations (TDRA) lists.
- Clause 32: The method of Clause 31, wherein the set of TDRA lists comprises at least: a K0 value defining an offset between a downlink slot in which a PDCCH downlink control information for downlink scheduling is received and a downlink slot in which PDSCH data is scheduled; a K1 value defining an offset between the downlink slot in which the PDSCH data is scheduled and an uplink slot in which a HARQ-ACK feedback for the PDSCH data needs to be sent; and a K2 value defining an offset between the downlink slot in which the PDCCH downlink control information for downlink scheduling is received and an uplink slot in which uplink data needs to be sent on a PUSCH.
- Clause 33: The method of Clause 32, wherein K1 is larger than or equal to a minimum offset between a PDSCH data transmission on a downlink and a HARQ-ACK feedback on an uplink, wherein the minimum offset is determined by the one or more processing parameters.
- Clause 34: The method of Clause 32, wherein K2 is larger than or equal to a minimum offset between a PDCCH transmission on a downlink and a PUSCH transmission on an uplink, wherein the minimum offset is determined by the one or more processing parameters.
- Clause 35: The method of any one of Clauses 26-34, further comprising transmitting signaling to the user equipment configured to configure a transmission time interval for the user equipment.
- Clause 36: The method of Clause 35, wherein: the signaling transmitted to the user equipment comprises downlink control information (DCI) configured to be used by the user equipment to: determine a number of transmission time intervals for the transmission time interval configuration based on the DCI; and select one of the first processing timeline or the second processing timeline further based on whether the number of transmission time intervals exceeds a threshold.
- Clause 37: The method of Clause 36, wherein the threshold is 1.
- Clause 38: The method of any one of Clauses 25-37, further comprising: receiving at least one of a monitoring condition or a scheduling condition from the user equipment, wherein the at least one of the monitoring condition or the scheduling condition indicates which of the first processing timeline or the second processing timeline is in use by the user equipment.
- Clause 39: The method of any one of Clauses 25-38, further comprising: transmitting configuration signaling to the user equipment, wherein the configuration signaling is configured to cause the user equipment to enter one or more of a monitoring mode or a scheduling mode.
- Clause 40: The method of Clause 39, further comprising determining that the user equipment is operating in one of the first processing timeline or second processing timeline based on the configuration signaling.
- Clause 41: The method of any one of Clauses 25-40, further comprising: transmitting data to the user equipment for processing by the user equipment, wherein processing data from the user equipment according to the determined timeline comprises processing an acknowledgement from the user equipment in accordance with one of the first processing timeline or second processing timeline for the user equipment defined in the capability report.
- Clause 42: An apparatus, comprising: a memory comprising executable instructions; one or more processors configured to execute the executable instructions and cause the apparatus to perform a method in accordance with any one of Clauses 1-41.
- Clause 43: An apparatus, comprising means for performing a method in accordance with any one of Clauses 1-41.
- Clause 44: A non-transitory computer-readable medium comprising executable instructions that, when executed by one or more processors of an apparatus, cause the apparatus to perform a method in accordance with any one of Clauses 1-41.
- Clause 45: A computer program product embodied on a computer-readable storage medium comprising code for performing a method in accordance with any one of Clauses 1-41.

Additional Wireless Communication Network Considerations

The techniques and methods described herein may be used for various wireless communications networks (or wireless wide area network (WWAN)) and radio access technologies (RATs). While aspects may be described herein using terminology commonly associated with 3G, 4G, and/or 5G (e.g., 5G new radio (NR)) wireless technologies, aspects of the present disclosure may likewise be applicable to other communication systems and standards not explicitly mentioned herein.

5G wireless communication networks may support various advanced wireless communication services, such as enhanced mobile broadband (eMBB), millimeter wave (mmWave), machine type communications (MTC), and/or mission critical targeting ultra-reliable, low-latency communications (URLLC). These services, and others, may include latency and reliability requirements.

Returning to FIG. 1, various aspects of the present disclosure may be performed within the example wireless communication network 100.

In 3GPP, the term “cell” can refer to a coverage area of a NodeB and/or a narrowband subsystem serving this coverage area, depending on the context in which the term is used. In NR systems, the term “cell” and BS, next generation NodeB (gNB or gNodeB), access point (AP), distributed unit (DU), carrier, or transmission reception point may be used interchangeably. A BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and/or other types of cells.

A macro cell may generally cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscription. A pico cell may cover a relatively small geographic area (e.g., a sports stadium) and may allow unrestricted access by UEs with service subscription. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs having an association with the femto cell (e.g., UEs in a Closed Subscriber Group (CSG) and UEs for users in the home). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS, home BS, or a home NodeB.

Base stations 102 configured for 4G LTE (collectively referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) may interface with the EPC 160 through first backhaul links 132 (e.g., an S1 interface). Base stations 102 configured for 5G (e.g., 5G NR or Next Generation RAN (NG-RAN)) may interface with 5GC 190 through second backhaul links 184. Base stations 102 may communicate directly or indirectly (e.g., through the EPC 160 or 5GC 190) with each other over third backhaul links 134 (e.g., X2 interface). Third backhaul links 134 may generally be wired or wireless.

Small cell 102′ may operate in a licensed and/or an unlicensed frequency spectrum. When operating in an unlicensed frequency spectrum, the small cell 102′ may employ NR and use the same 5 GHz unlicensed frequency spectrum as used by the Wi-Fi AP 150. Small cell 102′, employing NR in an unlicensed frequency spectrum, may boost coverage to and/or increase capacity of the access network.

Some base stations, such as gNB 180 may operate in a traditional sub-6 GHz spectrum, in millimeter wave (mmWave) frequencies, and/or near mmWave frequencies in communication with the UE 104. When the gNB 180 operates in mmWave or near mmWave frequencies, the gNB 180 may be referred to as an mmWave base station.

The communication links 120 between base stations 102 and, for example, UEs 104, may be through one or more carriers. For example, base stations 102 and UEs 104 may use spectrum up to Y MHz (e.g., 5, 10, 15, 20, 100, 400, and other MHz) bandwidth per carrier allocated in a carrier aggregation of up to a total of Yx MHz (x component carriers) used for transmission in each direction. The carriers may or may not be adjacent to each other. Allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated for DL than for UL). The component carriers may include a primary component carrier and one or more secondary component carriers. A primary component carrier may be referred to as a primary cell (PCell) and a secondary component carrier may be referred to as a secondary cell (SCell).

Wireless communications system 100 further includes a Wi-Fi access point (AP) 150 in communication with Wi-Fi stations (STAs) 152 via communication links 154 in, for example, a 2.4 GHz and/or 5 GHz unlicensed frequency spectrum. When communicating in an unlicensed frequency spectrum, the STAs 152/AP 150 may perform a clear channel assessment (CCA) prior to communicating in order to determine whether the channel is available.

Certain UEs 104 may communicate with each other using device-to-device (D2D) communication link 158. The D2D communication link 158 may use the DL/UL WWAN spectrum. The D2D communication link 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH). D2D communication may be through a variety of wireless D2D communications systems, such as for example, FlashLinQ, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the IEEE 802.11 standard, 4G (e.g., LTE), or 5G (e.g., NR), to name a few options.

EPC 160 may include a Mobility Management Entity (MME) 162, other MMES 164, a Serving Gateway 166, a Multimedia Broadcast Multicast Service (MBMS) Gateway 168, a Broadcast Multicast Service Center (BM-SC) 170, and a Packet Data Network (PDN) Gateway 172. MME 162 may be in communication with a Home Subscriber Server (HSS) 174. MME 162 is the control node that processes the signaling between the UEs 104 and the EPC 160. Generally, MME 162 provides bearer and connection management.

Generally, user Internet protocol (IP) packets are transferred through Serving Gateway 166, which itself is connected to PDN Gateway 172. PDN Gateway 172 provides UE IP address allocation as well as other functions. PDN Gateway 172 and the BM-SC 170 are connected to the IP Services 176, which may include, for example, the Internet, an intranet, an IP Multimedia Subsystem (IMS), a PS Streaming Service, and/or other IP services.

BM-SC 170 may provide functions for MBMS user service provisioning and delivery. BM-SC 170 may serve as an entry point for content provider MBMS transmission, may be used to authorize and initiate MBMS Bearer Services within a public land mobile network (PLMN), and may be used to schedule MBMS transmissions. MBMS Gateway 168 may be used to distribute MBMS traffic to the base stations 102 belonging to a Multicast Broadcast Single Frequency Network (MBSFN) area broadcasting a particular service, and may be responsible for session management (start/stop) and for collecting eMBMS related charging information.

5GC 190 may include an Access and Mobility Management Function (AMF) 192, other AMFs 193, a Session Management Function (SMF) 194, and a User Plane Function (UPF) 195. AMF 192 may be in communication with a Unified Data Management (UDM) 196.

AMF 192 is generally the control node that processes the signaling between UEs 104 and 5GC 190. Generally, AMF 192 provides QoS flow and session management.

All user Internet protocol (IP) packets are transferred through UPF 195, which is connected to the IP Services 197, and which provides UE IP address allocation as well as other functions for 5GC 190. IP Services 197 may include, for example, the Internet, an intranet, an IP Multimedia Subsystem (IMS), a PS Streaming Service, and/or other IP services.

Returning to FIG. 2, various example components of BS 102 and UE 104 (e.g., the wireless communication network 100 of FIG. 1) are depicted, which may be used to implement aspects of the present disclosure.

At BS 102, a transmit processor 220 may receive data from a data source 212 and control information from a controller/processor 240. The control information may be for the physical broadcast channel (PBCH), physical control format indicator channel (PCFICH), physical hybrid ARQ indicator channel (PHICH), physical downlink control channel (PDCCH), group common PDCCH (GC PDCCH), and others. The data may be for the physical downlink shared channel (PDSCH), in some examples.

A medium access control (MAC)-control element (MAC-CE) is a MAC layer communication structure that may be used for control command exchange between wireless nodes. The MAC-CE may be carried in a shared channel such as a physical downlink shared channel (PDSCH), a physical uplink shared channel (PUSCH), or a physical sidelink shared channel (PSSCH).

Processor 220 may process (e.g., encode and symbol map) the data and control information to obtain data symbols and control symbols, respectively. Transmit processor 220 may also generate reference symbols, such as for the primary synchronization signal (PSS), secondary synchronization signal (SSS), PBCH demodulation reference signal (DMRS), and channel state information reference signal (CSI-RS).

Transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, and/or the reference symbols, if applicable, and may provide output symbol streams to the modulators (MODs) in transceivers 232a-232t. Each modulator in transceivers 232a-232t may process a respective output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modulator may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. Downlink signals from the modulators in transceivers 232a-232t may be transmitted via the antennas 234a-234t, respectively.

At UE 104, antennas 252a-252r may receive the downlink signals from the BS 102 and may provide received signals to the demodulators (DEMODs) in transceivers 254a-254r, respectively. Each demodulator in transceivers 254a-254r may condition (e.g., filter, amplify, downconvert, and digitize) a respective received signal to obtain input samples. Each demodulator may further process the input samples (e.g., for OFDM) to obtain received symbols.

MIMO detector 256 may obtain received symbols from all the demodulators in transceivers 254a-254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols. Receive processor 258 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for the UE 104 to a data sink 260, and provide decoded control information to a controller/processor 280.

On the uplink, at UE 104, transmit processor 264 may receive and process data (e.g., for the physical uplink shared channel (PUSCH)) from a data source 262 and control information (e.g., for the physical uplink control channel (PUCCH) from the controller/processor 280. Transmit processor 264 may also generate reference symbols for a reference signal (e.g., for the sounding reference signal (SRS)). The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by the modulators in transceivers 254a-254r (e.g., for SC-FDM), and transmitted to BS 102.

At BS 102, the uplink signals from UE 104 may be received by antennas 234a-t, processed by the demodulators in transceivers 232a-232t, detected by a MIMO detector 236 if applicable, and further processed by a receive processor 238 to obtain decoded data and control information sent by UE 104. Receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to the controller/processor 240.

Memories 242 and 282 may store data and program codes for BS 102 and UE 104, respectively.

Scheduler 244 may schedule UEs for data transmission on the downlink and/or uplink.

5G may utilize orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) on the uplink and downlink. 5G may also support half-duplex operation using time division duplexing (TDD). OFDM and single-carrier frequency division multiplexing (SC-FDM) partition the system bandwidth into multiple orthogonal subcarriers, which are also commonly referred to as tones and bins. Each subcarrier may be modulated with data. Modulation symbols may be sent in the frequency domain with OFDM and in the time domain with SC-FDM. The spacing between adjacent subcarriers may be fixed, and the total number of subcarriers may be dependent on the system bandwidth. The minimum resource allocation, called a resource block (RB), may be 12 consecutive subcarriers in some examples. The system bandwidth may also be partitioned into subbands. For example, a subband may cover multiple RBs. NR may support a base subcarrier spacing (SCS) of 15 KHz and other SCS may be defined with respect to the base SCS (e.g., 30 kHz, 60 kHz, 120 kHz, 240 kHz, and others).

As above, FIGS. 3A-3D depict various example aspects of data structures for a wireless communication network, such as wireless communication network 100 of FIG. 1.

In various aspects, the 5G frame structure may be frequency division duplex (FDD), in which for a particular set of subcarriers (carrier system bandwidth), subframes within the set of subcarriers are dedicated for either DL or UL. 5G frame structures may also be time division duplex (TDD), in which for a particular set of subcarriers (carrier system bandwidth), subframes within the set of subcarriers are dedicated for both DL and UL. In the examples provided by FIGS. 3A and 3C, the 5G frame structure is assumed to be TDD, with subframe 4 being configured with slot format 28 (with mostly DL), where D is DL, U is UL, and X is flexible for use between DL/UL, and subframe 3 being configured with slot format 34 (with mostly UL). While subframes 3, 4 are shown with slot formats 34, 28, respectively, any particular subframe may be configured with any of the various available slot formats 0-61. Slot formats 0, 1 are all DL, UL, respectively. Other slot formats 2-61 include a mix of DL, UL, and flexible symbols. UEs are configured with the slot format (dynamically through DL control information (DCI), or semi-statically/statically through radio resource control (RRC) signaling) through a received slot format indicator (SFI). Note that the description below applies also to a 5G frame structure that is TDD.

Other wireless communication technologies may have a different frame structure and/or different channels. A frame (10 ms) may be divided into 10 equally sized subframes (1 ms). Each subframe may include one or more time slots. Subframes may also include mini-slots, which may include 7, 4, or 2 symbols. In some examples, each slot may include 7 or 14 symbols, depending on the slot configuration.

For example, for slot configuration 0, each slot may include 14 symbols, and for slot configuration 1, each slot may include 7 symbols. The symbols on DL may be cyclic prefix (CP) OFDM (CP-OFDM) symbols. The symbols on UL may be CP-OFDM symbols (for high throughput scenarios) or discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbols (also referred to as single carrier frequency-division multiple access (SC-FDMA) symbols) (for power limited scenarios; limited to a single stream transmission).

The number of slots within a subframe is based on the slot configuration and the numerology. For slot configuration 0, different numerologies (μ) 0 to 5 allow for 1, 2, 4, 8, 16, and 32 slots, respectively, per subframe. For slot configuration 1, different numerologies 0 to 2 allow for 2, 4, and 8 slots, respectively, per subframe. Accordingly, for slot configuration 0 and numerology μ, there are 14 symbols/slot and 2μ slots/subframe. The subcarrier spacing and symbol length/duration are a function of the numerology. The subcarrier spacing may be equal to 2^μ×15 kHz, where μ is the numerology 0 to 5. As such, the numerology μ=0 has a subcarrier spacing of 15 kHz and the numerology μ=5 has a subcarrier spacing of 480 kHz. The symbol length/duration is inversely related to the subcarrier spacing. FIGS. 3A-3D provide an example of slot configuration 0 with 14 symbols per slot and numerology μ=2 with 4 slots per subframe. The slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is approximately 16.67 μs.