Uplink transmission techniques in low latency wireless communications

Abstract

Methods, systems, and devices are described that provide the following for wireless communication: indicating transmit power control information to a user equipment (UE) for a semi-persistent scheduling (SPS) transmission in a short transmission time interval (TTI) from the UE; and configuring reference signal transmission in the SPS transmission of the short TTI. A UE can be configured with uplink power control information for SPS transmission using sTTIs that is separate from uplink power control for longer TTIs. The UE can receive the power control information and apply the power control information to the SPS transmission using sTTIs. Uplink transmit power for SPS sTTI transmissions can be independent of power control for regular sTTI transmissions and independent of power control for long TTI transmissions. The UE can apply a cyclic shift to a reference signal transmitted in the SPS transmission according to the SPS configuration, rather than according to a cyclic shift indicated in an SPS activation command.

Description

[0001] Cross-references

[0002] This patent application claims the benefit of U.S. Provisional Patent Application No. 62 / 584,110, filed November 9, 2017, entitled "Uplink Transmission Techniques in Low-Latency Wireless Communication" by Hosseini et al.; U.S. Patent Application No. 16 / 184,803, filed November 8, 2018, entitled "Uplink Transmission Techniques in Low-Latency Wireless Communication" by Hosseini et al.; and U.S. Patent Application No. 16 / 184,818, filed November 8, 2018, entitled "Uplink Transmission Techniques in Low-Latency Wireless Communication" by Hosseini et al., each of which has been assigned to the assignee of this application. Technical Field

[0003] In general, this disclosure relates to wireless communication, and more specifically, to uplink transmission techniques in low-latency wireless communication. Background Technology

[0004] Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcasting, and more. These systems can support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth-generation (4G) systems (e.g., Long Term Evolution (LTE) systems or improved LTE (LTE-A) systems) and fifth-generation (5G) systems (which may be referred to as New Radio (NR) systems). These systems can employ technologies 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 Spectrum OFDM (DFT-S-OFDM). A wireless multiple access communication system may include multiple base stations or access network nodes, each of which simultaneously supports communication with multiple communication devices (which may also be referred to as User Equipment (UE)).

[0005] In multiple access systems such as TDMA and OFDMA, wireless communication resources can be divided into time intervals (e.g., symbol periods, time slots, subframes, etc.) in the time domain and frequency bands (e.g., subbands, frequency bands, etc.) in the frequency domain. The divided communication resources can be referred to as a resource map. In some cases, time intervals (e.g., subframe numbers, system frame numbers, etc.) and frequency bands are associated with numeric identifiers that can be used to identify specific communication resources within the resource map. For example, a base station can use numeric identifiers when scheduling specific communication resources for one or more specific UEs. In some cases, when scheduling communication resources in a wireless communication system, a minimum scheduling interval, which can be referred to as a Time Transmission Interval (TTI), is used. For example, a subframe can be an example of a minimum scheduling interval, and a base station can schedule a UE to receive or transmit information on communication resources spanning one or more subframes.

[0006] In some examples, the first set of UEs may communicate with the base station using a TTI of a certain length, while the second set of UEs may communicate with the base station using TTIs of different lengths. For example, the base station may use a short TTI (sTTI) (e.g., a TTI spanning two or three symbol periods) to transmit low-latency information to the first set of UEs, and may use a long TTI (e.g., a TTI spanning 14 symbol periods) to transmit non-low-latency information to the second set of UEs.

[0007] In some cases, where relatively small packets can be sent at regular periodic intervals, semi-persistent scheduling (SPS) can be used to schedule uplink transmissions from one or more UEs. In some situations, it may be desirable to use SPS in conjunction with sTTI. Summary of the Invention

[0008] The described techniques relate to methods, systems, devices, or apparatuses supporting uplink transmission techniques in low-latency wireless communications. Various described techniques provide: instructing a user equipment (UE) to transmit power control information for semi-persistent scheduled (SPS) transmissions within a short transmission time interval (TTI) from the UE; and configuring reference signal transmissions in short TTI (sTTI) SPS transmissions. In some cases, the UE may be configured with uplink power control information for SPS transmissions using sTTIs, separate from uplink power control for longer TTIs (e.g., 1 ms TTIs). The UE may receive the power control information and apply it to SPS transmissions using sTTIs. In some cases, the uplink transmit power for SPS sTTI transmissions may be independent of power control for regular sTTI transmissions (e.g., sTTI transmissions scheduled via TTI permission provided in downlink control information (DCI), rather than via SPS) and independent of power control for long TTI transmissions.

[0009] In some cases, the base station can configure the UE for SPS transmission using sTTI, and the configuration information may include: an indication of where sTTI SPS power control information can be located, and information regarding reference signal transmissions (e.g., demodulation reference signal (DMRS) transmissions) sent in the SPS sTTI. In some cases, the reference signal information may include a cyclic shift to be applied to the transmitted reference signal, which may allow the base station to allocate overlapping resources to two or more UEs. In some cases, the configuration information may include an index value for the UE that identifies the location of power control information in the DCI that can be sent to multiple different UEs.

[0010] A wireless communication method is described. The method may include: receiving SPS activation for transmitting uplink transmissions in a first plurality of TTIs, wherein the first plurality of TTIs has a first TTI duration that is shorter than the duration of a second TTI in a second plurality of TTIs; receiving, during the first TTI in the second plurality of TTIs: first uplink power control information for setting a first uplink transmission power for at least one TTI in the first plurality of TTIs, and second uplink power control information for setting a second uplink transmission power for at least one TTI in the second plurality of TTIs; setting the first uplink power for at least one TTI in the first plurality of TTIs; and transmitting at least one TTI in the first plurality of TTIs according to SPS permission using the first uplink power.

[0011] An apparatus for wireless communication is described. The apparatus may include: a unit for receiving SPS activation for transmitting uplink transmissions in a first plurality of time periods (TTIs), wherein the first plurality of TTIs has a first TTI duration shorter than the duration of a second TTI in a second plurality of TTIs; a unit for receiving, during the first TTI in the second plurality of TTIs: first uplink power control information for setting a first uplink transmission power for at least one TTI in the first plurality of TTIs, and second uplink power control information for setting a second uplink transmission power for at least one TTI in the second plurality of TTIs; a unit for setting the first uplink power for at least one TTI in the first plurality of TTIs; and a unit for transmitting at least one TTI in the first plurality of TTIs using the first uplink power, according to SPS permission.

[0012] 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 may be operable to cause the processor to: receive SPS activation for transmitting uplink transmissions in a first plurality of TTIs, wherein the first plurality of TTIs has a first TTI duration shorter than the duration of a second TTI in a second plurality of TTIs; during the first TTI in the second plurality of TTIs, receive: first uplink power control information for setting a first uplink transmission power for at least one TTI in the first plurality of TTIs, and second uplink power control information for setting a second uplink transmission power for at least one TTI in the second plurality of TTIs; set the first uplink power for at least one TTI in the first plurality of TTIs; and transmit at least one TTI in the first plurality of TTIs according to SPS permission using the first uplink power.

[0013] 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: receive SPS activation for transmitting uplink transmissions in a first plurality of TTIs, wherein the first plurality of TTIs has a first TTI duration shorter than a second TTI duration in a second plurality of TTIs; during the first TTI in the second plurality of TTIs, receive: first uplink power control information for setting a first uplink transmission power for at least one TTI in the first plurality of TTIs, and second uplink power control information for setting a second uplink transmission power for at least one TTI in the second plurality of TTIs; set the first uplink power for at least one TTI in the first plurality of TTIs; and transmit at least one TTI in the first plurality of TTIs according to SPS permission using the first uplink power.

[0014] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the first uplink power control information and the second uplink power control information are transmitted in the DCI. Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include procedures, features, units, or instructions for receiving an index value used to identify the first uplink power control information from multiple different power control information provided in a first TTI within a second plurality of TTIs. In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the index value may be received in a configuration information element via Radio Resource Control (RRC) signaling.

[0015] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, uplink power control for a first plurality of TTIs may be performed independently of uplink power control for a second plurality of TTIs. In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, uplink power control for the first plurality of TTIs is performed independently of uplink power control for a third plurality of TTIs that may have a first TTI duration. In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, at least one of the first plurality of TTIs may be transmitted using the first uplink power in a subframe, said subframe being the next consecutive subframe after the reception of the first uplink power control information.

[0016] A wireless communication method is described. The method may include: sending an SPS activation to a UE for transmitting uplink transmission in a first plurality of TTIs, wherein the first plurality of TTIs has a first TTI duration that is shorter than the duration of a second TTI in a second plurality of TTIs; determining the following: first uplink power control information for setting a first uplink transmission power at the UE for at least one of the first plurality of TTIs, and second uplink power control information for setting a second uplink transmission power for at least one of the second plurality of TTIs; and sending the first uplink power control information and the second uplink power control information to the UE during the first TTI in the second plurality of TTIs.

[0017] An apparatus for wireless communication is described. The apparatus may include: a unit for transmitting SPS activation for transmitting uplink transmission in a first plurality of time periods (TTIs), wherein the first plurality of TTIs has a first TTI duration shorter than the duration of a second TTI in a second plurality of TTIs; a unit for determining: first uplink power control information for setting a first uplink transmission power at the UE for at least one of the first plurality of TTIs, and second uplink power control information for setting a second uplink transmission power for at least one of the second plurality of TTIs; and a unit for transmitting the first uplink power control information and the second uplink power control information to the UE during the first TTI in the second plurality of TTIs.

[0018] 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 may be operable to cause the processor to: send an SPS activation to a UE for transmitting uplink transmission in a first plurality of TTIs, wherein the first plurality of TTIs has a first TTI duration shorter than the duration of a second TTI in a second plurality of TTIs; determine: first uplink power control information for setting a first uplink transmission power at the UE for at least one of the first plurality of TTIs, and second uplink power control information for setting a second uplink transmission power for at least one of the second plurality of TTIs; and during the first TTI in the second plurality of TTIs, send the first uplink power control information and the second uplink power control information to the UE.

[0019] 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: send an SPS activation to a UE for transmitting uplink transmissions in a first plurality of TTIs, wherein the first plurality of TTIs has a first TTI duration shorter than the duration of a second TTI in a second plurality of TTIs; determine: first uplink power control information for setting a first uplink transmission power at the UE for at least one of the first plurality of TTIs, and second uplink power control information for setting a second uplink transmission power for at least one of the second plurality of TTIs; and during the first TTI in the second plurality of TTIs, send the first uplink power control information and the second uplink power control information to the UE.

[0020] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the first uplink power control information and the second uplink power control information may be transmitted in a DCI.

[0021] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include procedures, features, units, or instructions for configuring a UE with an index value used to identify first uplink power control information from multiple different power control information provided in a first TTI within a second plurality of TTIs. In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the index value may be sent to the UE via RRC signaling in a configuration information element.

[0022] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, uplink power control for a first plurality of TTIs may be performed independently of uplink power control for a second plurality of TTIs.

[0023] A wireless communication method is described. The method may include: receiving at a UE an SPS configuration for transmitting uplink transmissions in a first plurality of TTIs, wherein the first plurality of TTIs has a first TTI duration shorter than a second TTI duration of a second plurality of TTIs, and wherein the SPS configuration indicates configuration information for applying DMRS to be transmitted in one or more of the first plurality of TTIs, and the SPS configuration includes configuration information; receiving an activation command for activating the SPS during the first TTI in the second plurality of TTIs; formatting the DMRS for transmissions in one or more of the first plurality of TTIs in response to the activation command; configuring the DMRS according to the configuration information for transmissions in one or more of the first plurality of TTIs in response to the activation command; and transmitting the configured DMRS in at least one of the first plurality of TTIs.

[0024] An apparatus for wireless communication is described. The apparatus may include: a unit for receiving at a UE an SPS configuration for transmitting uplink transmissions in a first plurality of TTIs, wherein the first plurality of TTIs has a first TTI duration shorter than a second TTI duration of a second plurality of TTIs, and wherein the SPS configuration indicates configuration information for applying DMRS to be transmitted in one or more of the first plurality of TTIs; a unit for receiving an activation command for activating the SPS during the first TTI in the second plurality of TTIs; a unit for formatting the DMRS for transmissions in one or more of the first plurality of TTIs in response to the activation command; a unit for configuring the DMRS according to the configuration information for transmissions in one or more of the first plurality of TTIs in response to the activation command; and a unit for transmitting the configured DMRS in at least one of the first plurality of TTIs.

[0025] 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 may be operable to cause the processor to: receive at the UE an SPS configuration for transmitting uplink transmissions in a first plurality of TTIs, wherein the first plurality of TTIs has a first TTI duration shorter than a second TTI duration of a second plurality of TTIs, and wherein the SPS configuration indicates configuration information for applying DMRS to be transmitted in one or more of the first plurality of TTIs; receive an activation command for activating the SPS during the first TTI in the second plurality of TTIs; format the DMRS for transmissions in one or more of the first plurality of TTIs in response to the activation command; configure the DMRS according to the configuration information for transmissions in one or more of the first plurality of TTIs in response to the activation command; and transmit the configured DMRS in at least one of the first plurality of TTIs.

[0026] 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: receive at a UE an SPS configuration for transmitting uplink transmissions in a first plurality of TTIs, wherein the first plurality of TTIs has a first TTI duration shorter than a second TTI duration of a second plurality of TTIs, and wherein the SPS configuration indicates configuration information for applying DMRS to be transmitted in one or more of the first plurality of TTIs; receive an activation command for activating the SPS during the first TTI in the second plurality of TTIs; format the DMRS for transmissions in one or more of the first plurality of TTIs in response to the activation command; configure the DMRS according to the configuration information for transmissions in one or more of the first plurality of TTIs in response to the activation command; and transmit the configured DMRS in at least one of the first plurality of TTIs.

[0027] In some examples of the methods, apparatuses, or non-transitory computer-readable media described herein, multiple UEs may be configured with non-orthogonal SPS resources. In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the activation command includes a field indicating a DMRS cyclic shift, which may be ignored when the cyclic shift is applied. In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the DMRS cyclic shift indicated in the activation command may be used to enhance the reliability of the activation command and reduce the false alarm rate (FAR) for the activation command. In some examples of the methods, apparatuses, or non-transitory computer-readable media described herein, the activation command may be received from a base station in a DCI. In some examples of the methods, apparatuses, or non-transitory computer-readable media described herein, the DCI may have a predetermined DCI format for activating SPS.

[0028] In some examples of the methods, apparatuses and non-transitory computer-readable media described herein, the activation command may be verified by confirming that the cyclic redundancy check (CRC) of the activation command is scrambled by an SPS identifier that can be configured at the UE, and that one or more fields of the DCI, including the DMRS cyclic shift field, can be set to values ​​of a predetermined mode.

[0029] A wireless communication method is described. The method may include: sending an SPS configuration to a UE for uplink transmissions from the UE in a first plurality of time periods (TTIs), wherein the first plurality of TTIs has a first TTI duration shorter than a second TTI duration of a second plurality of TTIs, and wherein the SPS configuration includes a cyclic shift to apply DMRS transmissions to one or more TTIs in the first plurality of TTIs; sending an activation command to the UE to activate the SPS during the first TTI in the second plurality of TTIs; receiving one or more uplink transmissions in the first plurality of TTIs, the one or more uplink transmissions including DMRS transmissions; processing the DMRS according to configuration information; and decoding the one or more uplink transmissions at least in part based on the processed DMRS.

[0030] An apparatus for wireless communication is described. The apparatus may include: a unit for transmitting to a UE an SPS configuration for uplink transmissions from the UE in a first plurality of TTIs, wherein the first plurality of TTIs has a first TTI duration shorter than a second TTI duration of a second plurality of TTIs, and wherein the SPS configuration includes a cyclic shift for applying DMRS to one or more TTIs in the first plurality of TTIs; a unit for transmitting to the UE an activation command for activating the SPS during the first TTI in the second plurality of TTIs; a unit for receiving one or more uplink transmissions in the first plurality of TTIs, the one or more uplink transmissions including DMRS transmissions; a unit for processing DMRS according to configuration information; and a unit for decoding the one or more uplink transmissions at least in part based on the processed DMRS.

[0031] 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 may be operable to cause the processor to: send to the UE an SPS configuration for uplink transmissions from the UE in a first plurality of TTIs, wherein the first plurality of TTIs has a first TTI duration shorter than the duration of a second TTI in a second plurality of TTIs, and wherein the SPS configuration indicates configuration information for applying DMRS to one or more TTIs in the first plurality of TTIs; during the first TTI in the second plurality of TTIs, send to the UE an activation command for activating the SPS; receive one or more uplink transmissions in the first plurality of TTIs, the one or more uplink transmissions including DMRS transmissions; process the DMRS according to the configuration information; and decode the one or more uplink transmissions at least in part based on the processed DMRS. In some cases, a configuration for using DMRS and / or cyclic shifting for DMRS may be determined. In this case, the UE may ignore bit fields in the DCI and may alternatively utilize the determined configuration.

[0032] 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: send to a UE an SPS configuration for uplink transmissions from the UE in a first plurality of TTIs, wherein the first plurality of TTIs has a first TTI duration shorter than a second TTI duration of a second plurality of TTIs, and wherein the SPS configuration indicates configuration information for DMRS to be applied to transmissions in one or more of the first plurality of TTIs; during the first TTI in the second plurality of TTIs, send to the UE an activation command for activating the SPS; receive one or more uplink transmissions in the first plurality of TTIs, the one or more uplink transmissions including DMRS transmissions; process the DMRS according to the configuration information for transmissions in one or more of the first plurality of TTIs in response to the activation command; and decode the one or more uplink transmissions at least in part based on the processed DMRS.

[0033] In some examples of the methods, apparatuses, or non-transitory computer-readable media described herein, multiple UEs may be configured with non-orthogonal SPS resources. In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the activation command includes a field for indicating a DMRS cyclic shift, which may be ignored by the UE when a cyclic shift is applied to the DMRS. Attached Figure Description

[0034] Figure 1An example of a system for wireless communication supporting uplink transmission technology in low-latency wireless communication is shown according to aspects of this disclosure.

[0035] Figure 2 An example of a wireless communication subsystem supporting uplink transmission technology in low-latency wireless communication is shown according to aspects of this disclosure.

[0036] Figure 3 Examples of wireless resources supporting uplink transmission techniques in low-latency wireless communication are shown according to aspects of this disclosure.

[0037] Figure 4 An example of a process flow supporting uplink transmission techniques in low-latency wireless communication is shown according to aspects of this disclosure.

[0038] Figures 5 to 7 A block diagram of a device supporting uplink transmission technology in low-latency wireless communication is shown according to aspects of this disclosure.

[0039] Figure 8 A block diagram of a system including a UE that supports uplink transmission technology in low-latency wireless communication is shown according to aspects of this disclosure.

[0040] Figures 9 to 11 A block diagram of a device supporting uplink transmission technology in low-latency wireless communication is shown according to aspects of this disclosure.

[0041] Figure 12 A block diagram of a system including a base station supporting uplink transmission technology in low-latency wireless communication is shown according to aspects of this disclosure.

[0042] Figures 13 to 18 Methods for uplink transmission techniques in low-latency wireless communication are illustrated according to aspects of this disclosure. Detailed Implementation

[0043] The base station and user equipment (UE) can communicate with each other using a transmission time interval (TTI) of a first duration (e.g., 1 ms) (or “non-low latency TTI” or “long TTI”) as the minimum scheduling interval. Accordingly, the base station and UE can configure the communication process based on the minimum scheduling interval (e.g., semi-persistent scheduling (SPS)). For example, they can utilize periods that support latency corresponding to the minimum scheduling interval, and use reference resources and power control spanning the minimum scheduling interval. In some cases, the base station and UE can also communicate with each other using a second duration TTI as the minimum scheduling interval, where the second duration may be shorter than the first duration. In some cases, the second duration TTI can be referred to as a "low-latency TTI" or "short TTI" (also known as sTTI), and can be a 1-symbol OFDM TTI (which can be 71.4 μs in length), a 2-symbol OFDM TTI (which can be 142.8 μs in length), a 3-symbol OFDM TTI (which can be 214.3 μs in length), or a 7-symbol OFDM TTI (which can be 0.5 ms in length, and is also known as a slotted TTI). In some cases, communication processes that support communication using a first duration TTI cannot support communication using a low-latency TTI or cause performance degradation for communication using a low-latency TTI.

[0044] Therefore, according to various aspects of this disclosure, enhanced power management and reference signal transmission techniques can be used to provide power control and reference signal transmission when using SPS for sTTI. In some cases, the UE can be configured with uplink power control information for SPS transmissions using sTTI, which is separate from the uplink power control for long TTI. The UE can receive the power control information and apply it to SPS transmissions using sTTI. In some cases, the uplink transmit power for SPS sTTI transmissions can be independent of the power control used for regular sTTI transmissions (e.g., sTTI transmissions scheduled via TTI permission provided in downlink control information, rather than via SPS) and independent of the power control used for long TTI transmissions.

[0045] In some cases, the base station can configure the UE for SPS transmission using sTTI, and the configuration information may include: an indication of where sTTI SPS power control information can be located, and information regarding reference signal transmission (e.g., demodulation reference signal (DMRS) transmission) to be sent in the SPS sTTI. In some cases, the reference signal information may include a cyclic shift to be applied to the transmitted reference signal, which may allow the base station to allocate overlapping resources to two or more UEs. In some cases, the configuration information may include an index value for the UE that identifies the location of power control information in the DCI that can be sent to multiple different UEs.

[0046] The aspects of this disclosure are first described in the context of a wireless communication system. These aspects are further illustrated and described with reference to apparatus diagrams, system diagrams, and flowcharts relating to uplink transmission techniques in low-latency wireless communication.

[0047] Figure 1 Examples of a wireless communication system 100 according to various aspects of this disclosure are shown. The wireless communication system 100 includes a base station 105, a user interface unit (UE) 115, and a core network 130. In some examples, the wireless communication system 100 may be a Long Term Evolution (LTE) network, an improved LTE (LTE-A) network, or a New Radio (NR) network. In some cases, the wireless communication system 100 may support enhanced broadband communication, ultra-reliable (e.g., mission-critical) communication, low-latency communication, or communication with low-cost and low-complexity devices. According to aspects of this disclosure, the wireless communication system 100 may support SPS transmission using sTTI.

[0048] Base station 105 can wirelessly communicate with UE 115 via one or more base station antennas. Base station 105 described herein may include, or may be referred to by those skilled in the art as, a base transceiver, wireless base station, access point, wireless transceiver, Node B, evolved Node B (eNB), next-generation Node B, or gigabit Node B (any of which may be referred to as gNB), home Node B, home evolved Node B, or some other suitable term. Wireless communication system 100 may include different types of base stations 105 (e.g., macro base stations or small cell base stations). UE 115 described herein is capable of communicating with various types of base stations 105 and network devices (including macro eNBs, small cell eNBs, gNBs, relay base stations, etc.).

[0049] Each base station 105 may be associated with a specific geographic coverage area 110 in which communication with each UE 115 is supported. Each base station 105 may provide communication coverage to the corresponding geographic coverage area 110 via a communication link 125, and the communication link 125 between the base station 105 and the UE 115 may utilize one or more carriers. The communication link 125 shown in the wireless communication system 100 may include: an uplink transmission from the UE 115 to the base station 105, or a downlink transmission from the base station 105 to the UE 115. The downlink transmission may also be referred to as a forward link transmission, and the uplink transmission may also be referred to as a reverse link transmission.

[0050] The geographic coverage area 110 for base station 105 can be divided into sectors, each sector constituting only a part of the geographic coverage area 110, and each sector can be associated with a cell. For example, each base station 105 can provide communication coverage for macro cells, small cells, hotspots, or other types of cells, or various combinations thereof. In some examples, base station 105 can be mobile, and therefore, communication coverage is provided for mobile geographic coverage areas 110. In some examples, different geographic coverage areas 110 associated with different technologies can overlap, and overlapping geographic coverage areas 110 associated with different technologies can be supported by the same base station 105 or different base stations 105. The wireless communication system 100 can include, for example, a heterogeneous LTE / LTE-A or NR network, wherein different types of base stations 105 provide coverage for individual geographic coverage areas 110.

[0051] The term "cell" refers to a logical communication entity used for communication with base station 105 (e.g., on a carrier) and may be associated with an identifier (e.g., Physical Cell Identifier (PCID), Virtual Cell Identifier (VCID)) used to distinguish neighboring cells operating via the same or different carriers. In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., Machine-Type Communication (MTC), Narrowband Internet of Things (NB-IoT), Enhanced Mobile Broadband (eMBB), or other protocol types) that can provide access for different types of devices. In some cases, the term "cell" may refer to a portion (e.g., a sector) of the geographical coverage area 110 on which the logical entity operates.

[0052] UE 115 may be distributed throughout the wireless communication system 100, and each UE 115 may be stationary or mobile. UE 115 may also be referred to as a mobile device, wireless device, remote device, handheld device, or user equipment, or some other suitable term, wherein "device" may also be referred to as a cell, station, wireless communication terminal, terminal, telephone, or client. UE 115 may also be a personal electronic device, such as a cellular phone, personal digital assistant (PDA), tablet computer, laptop computer, or personal computer. In some examples, UE 115 may also refer to a wireless local loop (WLL) station, Internet of Things (IoT) device, Internet of Things (IoE) device, or MTC device, which may be implemented in various items such as appliances, vehicles, instruments, etc.

[0053] Some UE 115s (e.g., MTC or IoT devices) can be low-cost or low-complexity devices and can provide automated communication between machines (e.g., via machine-to-machine (M2M) communication). M2M communication or MTC can refer to data communication technologies that allow devices to communicate with each other or with base station 105 without human intervention. In some examples, M2M communication or MTC can include communication from devices that integrate sensors or meters to measure or capture information and relay that information to a central server or application that can utilize the information or present it to humans interacting with the program or application. Some UE 115s can be designed to collect information or enable automated machine behavior. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, climate and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based billing.

[0054] In some cases, UE 115 can also communicate directly with other UE 115 (e.g., using peer-to-peer (P2P) or device-to-device (D2D) protocols). One or more UE 115s in a group utilizing D2D communication can be within the geographic coverage area 110 of base station 105. Other UE 115s in such a group can be outside the geographic coverage area 110 of base station 105, or otherwise unable to receive transmissions from base station 105. In some cases, the group of UE 115s communicating via D2D communication can utilize a one-to-many (1:M) system, where each UE 115 transmits to every other UE 115 in the group. In some cases, base station 105 facilitates the scheduling of resources for D2D communication. In other cases, D2D communication is performed between UE 115s without involving base station 105.

[0055] Base station 105 can communicate with core network 130 and with each other. For example, base station 105 can interface with core network 130 via backhaul link 132 (e.g., via S1 or other interfaces). Base station 105 can communicate with each other directly (e.g., directly between base stations 105) or indirectly (e.g., via core network 130) on backhaul link 134 (e.g., via X2 or other interfaces).

[0056] Core network 130 can provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. Core network 130 may be an evolved packet core (EPC), which may include at least one Mobility Management Entity (MME), at least one Serving Gateway (S-GW), and at least one Packet Data Network (PDN) Gateway (P-GW). The MME can manage non-access stratum (e.g., control plane) functions, such as mobility, authentication, and bearer management for UE 115 served by base station 105 associated with the EPC. User IP packets can be transmitted via the S-GW, which itself may be connected to the P-GW. The P-GW can provide IP address allocation and other functions. The P-GW may be connected to network operator IP services. Operator IP services may include access to the Internet, intranets, IP Multimedia Subsystem (IMS), or packet-switched (PS) streaming services.

[0057] At least some of the network devices (e.g., base station 105) may include sub-components such as access network entities, which may be examples of access node controllers (ANCs). Each access network entity may communicate with UE 115 through multiple other access network transport entities (which may be referred to as radio headends, smart radio headends, or transmit / receive points (TRPs)). In some configurations, the various functions of each access network entity or base station 105 may be distributed across various network devices (e.g., radio headends and access network controllers) or incorporated into a single network device (e.g., base station 105).

[0058] In some cases, wireless communication system 100 may utilize both licensed and unlicensed radio frequency spectrum bands. Unlicensed spectrum may include frequency bands traditionally used by Wi-Fi technologies, such as the 5 GHz band, 2.4 GHz band, 60 GHz band, 3.6 GHz band, and / or 900 MHz band. Unlicensed spectrum may also include other frequency bands. For example, wireless communication system 100 may employ Licensed Assisted Access (LAA), LTE Unlicensed (LTE-U) radio access technology, or NR technology in unlicensed frequency bands (e.g., the 5 GHz ISM band). When operating in unlicensed radio frequency spectrum bands, wireless devices (e.g., base station 105 and UE 115) may employ a Listen-Before-Speak (LBT) procedure before transmitting data to ensure that the frequency channel is idle. In some cases, operation in unlicensed frequency bands may be based on a CA configuration combined with CC operation in licensed frequency bands (e.g., LAA). Operation in unlicensed spectrum may include downlink transmissions, uplink transmissions, peer-to-peer transmissions, or a combination of these. Duplexing in unlicensed spectrum can be based on frequency division duplex (FDD), time division duplex (TDD), or a combination of both.

[0059] In some examples, base station 105 or UE 115 may be equipped with multiple antennas, which can be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communication, or beamforming. For example, wireless communication system 100 may use a transmission scheme between a transmitting device (e.g., base station 105) and a receiving device (e.g., UE 115), wherein the transmitting device is equipped with multiple antennas, and the receiving device is equipped with one or more antennas. MIMO communication can employ multipath signal propagation to improve spectral efficiency by transmitting or receiving multiple signals via different spatial layers, which can be referred to as spatial multiplexing. For example, the transmitting device may transmit multiple signals via different antennas or different combinations of antennas. Similarly, the receiving device may receive multiple signals via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams. Different spatial layers may be associated with different antenna ports used for channel measurement and reporting. MIMO technology can include single-user MIMO (SU-MIMO) (where multiple spatial layers are sent to the same receiving device) and multi-user MIMO (MU-MIMO) (where multiple spatial layers are sent to multiple devices).

[0060] In some cases, the wireless communication system 100 may be a packet-based network operating according to a layered protocol stack. In the user plane, communication at the bearer or Packet Data Convergence Protocol (PDCP) layer may be IP-based. In some cases, the Radio Link Control (RLC) layer may perform packet fragmentation and reassembly for communication on logical channels. The Media Access Control (MAC) layer may perform priority handling and multiplexing of logical channels to transport channels. The MAC layer may also use Hybrid Automatic Repeat Request (HARQ) to provide retransmissions at the MAC layer to improve link efficiency. In the control plane, the Radio Resource Control (RRC) protocol layer may provide the establishment, configuration, and maintenance of RRC connections (which support radio bearers for user plane data) between the UE 115 and the base station 105 or core network 130. At the physical (PHY) layer, transport channels may be mapped to physical channels.

[0061] In some cases, UE 115 and base station 105 can support data retransmission to increase the likelihood of successful data reception. HARQ feedback is a technique to increase the likelihood of correct data reception on communication link 125. HARQ may include a combination of error detection (e.g., using Cyclic Redundancy Check (CRC)), forward error correction (FEC), and retransmission (e.g., Automatic Repeat Request (ARQ)). HARQ can improve throughput at the MAC layer under poor radio conditions (e.g., signal and noise conditions). In some cases, the radio device can support HARQ feedback within the same time slot, where the device can provide HARQ feedback for data received in a previous symbol within the time slot. In other cases, the device can provide HARQ feedback in subsequent time slots or according to some other time interval.

[0062] It can be in the basic unit of time (which can, for example, refer to T) s The time interval in LTE or NR is represented as a multiple of a sampling period of 1 / 30,720,000 seconds. The time interval of communication resources can be organized based on radio frames, each with a duration of 10 milliseconds (ms), where the frame period can be expressed as T. f =307,200T sRadio frames can be identified by System Frame Numbers (SFNs) ranging from 0 to 1023. Each frame may include ten subframes numbered from 0 to 9, and each subframe may have a duration of 1 ms. Subframes may be further divided into two time slots, each with a duration of 0.5 ms, and each time slot may contain 6 or 7 modulation symbol periods (e.g., depending on the length of the cyclic prefix added before each symbol period). Excluding the cyclic prefix, each symbol period may contain 2048 sampling periods. In some cases, a subframe may be the minimum scheduling unit of the wireless communication system 100 and may be referred to as a TTI. In other cases, the minimum scheduling unit of the wireless communication system 100 may be shorter than a subframe or may be dynamically selected (e.g., in a burst of shortened TTIs (sTTIs) or in selected component carriers using sTTIs).

[0063] In some wireless communication systems, time slots can be further divided into multiple micro-time slots containing one or more symbols. In some instances, the symbol or micro-time slot of a micro-time slot can be the smallest scheduling unit. The duration of each symbol can vary depending on, for example, the operating subcarrier spacing or frequency band. Furthermore, some wireless communication systems can implement time slot aggregation, where multiple time slots or micro-time slots are aggregated together and used for communication between UE 115 and base station 105.

[0064] The term "carrier" refers to a set of radio frequency spectrum resources having a defined physical layer structure for supporting communication on communication link 125. For example, a carrier of communication link 125 may include a portion of a radio frequency spectrum band that operates according to physical layer channels for a given radio access technology. Each physical layer channel may carry user data, control information, or other signaling. Carriers may be associated with predefined frequency channels (e.g., E-UTRA Absolute Radio Channel Number (EARFCN)) and may be positioned according to a channel grid used for discovery by UE 115. A carrier may be downlink or uplink (e.g., in FDD mode), or may be configured to carry both downlink and uplink communication (e.g., in TDD mode). In some examples, the signal waveform transmitted on a carrier may consist of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as OFDM or DFT-S-OFDM).

[0065] The carrier organization structure can vary depending on the radio access technology (e.g., LTE, LTE-A, NR, etc.). For example, communication on a carrier can be organized according to a Time Interchange Time (TTI) or time slot, each of which can include user data and control information or signaling to support the decoding of the user data. A carrier can also include dedicated acquisition signaling (e.g., synchronization signals or system information) and control signaling to coordinate operations on the carrier. In some examples (e.g., in a carrier aggregation configuration), a carrier can also have acquisition signaling or control signaling to coordinate operations on other carriers.

[0066] Physical channels can be multiplexed on a carrier using various techniques. For example, time division multiplexing (TDM), frequency division multiplexing (FDM), or hybrid TDM-FDM techniques can be used to multiplex physical control channels and physical data channels on a downlink carrier. In some examples, control information transmitted in the physical control channel can be distributed in a concatenated manner between different control regions (e.g., between a common control region or common search space and one or more UE-specific control regions or UE-specific search spaces).

[0067] In a system employing MCM technology, a resource element can consist of a symbol period (e.g., the duration of a modulation symbol) and a subcarrier, where the symbol period and subcarrier spacing are inversely related. The number of bits carried by each resource element can depend on the modulation scheme (e.g., the order of the modulation scheme). Therefore, the more resource elements UE 115 receives and the higher the order of the modulation scheme, the higher the data rate can be for UE 115. In a MIMO system, wireless communication resources can refer to a combination of wireless spectrum resources, temporal resources, and spatial resources (e.g., spatial layers), and the use of multiple spatial layers can further increase the data rate used for communication with UE 115.

[0068] The wireless communication system 100 can support communication with the UE 115 on multiple cells or carriers (a feature that may be referred to as carrier aggregation (CA) or multi-carrier operation). Depending on the carrier aggregation configuration, the UE 115 can be configured with multiple downlink CCs and one or more uplink CCs. Carrier aggregation can be used in conjunction with both FDD and TDD component carriers.

[0069] In some cases, the wireless communication system 100 may utilize enhanced component carriers (eCC). eCC can be characterized by one or more features including: a wider carrier or frequency channel bandwidth, a shorter symbol duration, a shorter TTI duration, or a modified control channel configuration. In some cases, eCC may be associated with carrier aggregation or dual connectivity configurations (e.g., when multiple serving cells have suboptimal or non-ideal backhaul links). eCC can also be configured for use in unlicensed or shared spectrum (e.g., where more than one operator is permitted to use the spectrum). eCC characterized by a wider carrier bandwidth may include one or more segments that can be used by a UE 115 that is unable to monitor the entire carrier bandwidth or is otherwise configured to use a limited carrier bandwidth (e.g., to save power).

[0070] In some cases, eCC can utilize a different symbol duration than other CCs, which may include using a reduced symbol duration compared to other CCs. A shorter symbol duration can be associated with increased spacing between adjacent subcarriers. Devices utilizing eCC (e.g., UE 115 or base station 105) can transmit wideband signals (e.g., based on frequency channels or carrier bandwidths of 20, 40, 60, 80 MHz, etc.) with a reduced symbol duration (e.g., 16.67 microseconds). The TTI in eCC can consist of one or more symbol periods. In some cases, the TTI duration (i.e., the number of symbol periods in the TTI) can be variable.

[0071] The base station and the UE can communicate with each other using a first duration (e.g., 1 ms) of TTI (or “non-low latency TTI” or “long TTI”) as the minimum scheduling interval. Accordingly, the base station and the UE can configure the communication process (e.g., SPS) based on the minimum scheduling interval; for example, they can utilize a period that supports latency corresponding to the minimum scheduling interval, and use reference resources and power control spanning the minimum scheduling interval. In some cases, the base station and the UE can also communicate with each other using a second duration of TTI as the minimum scheduling interval, where the second duration may be shorter than the first duration. In some cases, the second duration TTI can be referred to as a “low-delay TTI” or “short TTI” (also known as sTTI), and can be a 1-orthogonal frequency division multiplexing (OFDM) symbol TTI (which can be 71.4 μs in length), a 2-OFDM symbol TTI (which can be 142.8 μs in length), a 3-OFDM symbol TTI (which can be 214.3 μs in length), or a 7-OFDM symbol TTI (which can be 0.5 ms in length and is also known as a slotted TTI).

[0072] Low-latency TTI or sTTI operation may suffer from the problem of lacking a common search space, thus, when SPS is activated, there may be no sTTI-specific power control mechanism in UL. Another issue is that communication procedures supporting TTI using the first duration may not support communication using low-latency TTI. Furthermore, communication procedures supporting TTI using the first duration may lead to performance degradation for communication using low-latency TTI. Therefore, according to various aspects of this disclosure, enhanced power management and reference signal transmission techniques can be used to provide power control and reference signal transmission when using SPS for sTTI. In some cases, format 3 / 3A can be used to send power control commands for both TTI and sTTI under SPS. This can be applied to PUCCH / PUSCH and SPUCCH / sTTIPUSCH respectively. Additionally, the indices can be different for UL control and UL data under SPS.

[0073] To address the lack of a sTTI-specific power control mechanism when SPS is activated, the UE can be configured with uplink power control for SPS transmissions using sTTI, separate from uplink power control for long TTIs. The UE can receive power control information and apply it to SPS transmissions using sTTI. Advantageously, the uplink transmit power for SPS sTTI transmissions can be independent of power control for regular sTTI transmissions (e.g., sTTI transmissions scheduled via TTI-specific permission provided in the DCI, rather than via SPS) and independent of power control for long TTI transmissions. Power control information can be transmitted in the DCI.

[0074] In one example, a solution to the lack of a mechanism specific to sTTI when SPS is activated may include a UE 115 and a base station 105 communicating using a first-size or-duration TTI and a second-size or-duration TTI. In some examples, SPS may be used to schedule sTTI transmissions at UE 115. In some cases, uplink power control information for SPS transmissions using sTTI may be separate from uplink power control for long TTIs and for sTTIs scheduled normally. In some cases, base station 105 may configure UE 115 for SPS transmissions using sTTI, and the configuration information may include: an indication of where the sTTI SPS power control information may be located within a DCI transmission sent using a long TTI, and information regarding reference signal transmissions (e.g., DMRS transmissions) sent in the SPS sTTI. In some cases, the reference signal information may include a cyclic shift to be applied to the transmitted reference signal, which may allow the base station to allocate overlapping resources to two or more UEs 115. In some cases, the configuration information may include an index value for UE115 that identifies the location of power control information in the DCI that can be sent to multiple different UE115s.

[0075] In some cases, the UE can receive an SPS configuration for transmitting UL transmissions during the sTTI, and the SPS configuration can indicate configuration information to be applied to the DMRS to be transmitted during the sTTI. The UE can receive an activation command during the sTTI to activate the SPS configuration, and configure the DMRS according to the configuration information for transmissions during the sTTI in response to the activation command.

[0076] In some examples, the reference signal information may include a cyclic shift to be applied to the transmitted reference signal, which can allow the base station to allocate overlapping resources to two or more UEs 115. This solution can allow contention-based UL transmission while keeping the false alarm rate (FAR) low, where the DMRS cyclic shift field can be set in a fixed manner, but correspondingly, the DMRS for cyclic shifting for each UC can be given as part of its SPS configuration. In some cases, the configuration information may include an index value for UE 115 that identifies the location of power control information in the DCI that can be sent to multiple different UEs 115.

[0077] In some cases, the base station can configure the UE for SPS transmission using sTTI, and the configuration information may include: an indication of where sTTI SPS power control information may be located, and information regarding reference signal transmissions (e.g., DMRS transmissions) sent in the SPS sTTI. In some cases, the reference signal information may include configuration information. In some cases, the configuration information may include an index value for the UE that identifies the location of power control information in a DCI that may be sent to multiple different UEs. In other cases, the reference signal information may include a cyclic shift to be applied to the transmitted reference signal, which may allow the base station to allocate overlapping resources to two or more UEs.

[0078] Figure 2 Examples of a wireless communication subsystem 200 supporting uplink transmission techniques in low-latency wireless communication are shown according to various aspects of this disclosure. In some examples, the wireless communication subsystem 200 may implement aspects of the wireless communication system 100. Figure 2 In the example, the wireless communication subsystem 200 may include a base station 105-a, which may be... Figure 1 An example of base station 105. Wireless communication subsystem 200 may also include UE 115-a, which may be... Figure 1 An example of UE 115, which is located within the coverage area 110-a of base station 105-a.

[0079] exist Figure 2 In the example, base station 105-a and UE 115-a can establish connection 205. In some cases, base station 105-a can configure UE 115-a for SPS transmissions that can utilize periodic SPS resources 210. As indicated herein, SPS can be used to support services (e.g., Voice over Internet Protocol (VoIP) services, services of certain devices that can be sent on a scheduled periodic basis, etc.) where packet sizes are relatively small and the time between arrivals is constant. To support such services, it would be wasteful to use physical downlink control channel (PDCCH) transmissions to send resource allowances for each transmission, and therefore SPS can be configured to avoid sending resource allowances and associated information separately for each transmission. When UE 115-a is configured with SPS, certain parameters (such as the SPS Radio Network Temporary Identifier (RNTI), the number of HARQ procedures, the period, etc.) are indicated via RRC signaling as part of the SPS configuration. Then, UE 115-a can be explicitly activated via PDCCH, the CRC of which is scrambled by UE 115-a SPS-RNTI.

[0080] In some deployments, certain DCI formats can be used to configure and activate SPS (e.g., in LTE, format 0 can be used to activate / deactivate SPS in UL, formats 1 / 1A / 2 / 2A / 2B / 2C / 2D can be used to activate SPS in DL, and format 1A can be used to deactivate SPS in DL). In some cases, for activation / deactivation verification, there are certain parameters in the DCI content that should be set in a specific way, so that certain fields have predefined value patterns, which can reduce the FAR of activation / deactivation. In some cases, SPS can only be activated on Pcell. For SPS transmissions using long TTIs, transmit power control for the Physical Uplink Control Channel (PUCCH) in downlink clearance is used for PUCCH resource allocation, and PUCCH and PUSCH power can be controlled via power commands in certain types of DCIs (which can operate as closed-loop power control). In some LTE deployments, the parameter tpc-Index can be configured as part of the TPC-PDCCH-Config information element (IE) for each UE via RRC, and the parameter tpc-Index is used to find the power control command within the bit string.

[0081] In various aspects of this disclosure, SPS can be provided for sTTI transmissions. However, the DCI associated with a particular sTTI may not have a common search space, and therefore, when SPS is activated, there is no sTTI-specific power control mechanism in the UL as there is for long TTI SPS activation. In some cases, UE 115-a may rely on power control commands sent in the PDCCH common search space via DCI in long TTI PDCCH transmissions. In some cases, power control for SPS transmissions may be performed independently of power control for non-SPS transmissions and long TTI transmissions. To implement such SPS sTTI power control, one or more parameters indicating SPS sTTI power control may be included in the PDCCH DCI transmission. In some examples, one or more parameters may be included in the TPC-PDCCH-Config IE. For example, the parameter tpc-Index-sTTI can be added to the TPC-PDCCH-Config IE. The parameter tpc-Index-sTTI is used to obtain power control commands for a given UE within a command string in the payload of one or more defined DCI formats (e.g., DCI format 3 / 3A).

[0082] When sTTI-based SPS is activated, UE 115-a can monitor the common search space for each subframe and, if detected, modify its SPS sPUCCH / sPUSCH power according to the established power control command (e.g., the power control command in DCI format 3 / 3A). In this way, power control for SPS transmissions using sTTI can be transmitted, and UE 115-a can send uplink transmissions based on appropriate power control for the transmission type (e.g., SPS or non-SPS transmission) and TTI duration. In some cases, UE 115-a can apply power control in the next consecutive subframe after receiving the DCI. This can differ from other processes, such as in other examples, where if a power control command is received in subframe n, the command can be applied to subframe n+4 instead of a later defined number of subframes. In one example, the defined number of subframes could be one subframe after receiving the DCI (e.g., the next subframe after receiving the DCI). In some examples, the command can be applied to any number of subframes after receiving the DCI. In some cases, DCI can be sent within the traditional PDCCH area.

[0083] In some cases, base station 105-a may also provide UE 115-a with information for transmitting reference signals (e.g., DMRS transmissions) in SPS transmissions using sTTI. In some cases, the reference signal information may include cyclic shifts to be applied to the transmitted reference signals, which may allow the base station to allocate overlapping resources to two or more UEs for SPS transmissions.

[0084] Figure 3 Examples of radio resources 300 supporting uplink transmission techniques in low-latency wireless communication are shown according to various aspects of this disclosure. In some examples, radio resources 300 may implement aspects of wireless communication system 100. In this case, radio resources 300 may span two 1ms TTIs, namely TTI-0 305 and TTI-1 310. The base station may send transmit power control (TPC) for sTTI SPS 315. In some cases, the closed-loop power control mechanisms for schedule-based sPUSCH / sPUCCH and SPS-based sPUSCH / sPUCCH may remain separate, and a regular sTTI TPC command 320 may be sent. The UE may send sTTI SPS sPUSCH transmissions 325 based on the TPC command 315.

[0085] As described herein, in some cases, uplink SPS can be activated via DCI format (e.g., DCI format 0). Accordingly, in some cases, power control commands received via DCI format 3 / 3A can be applied to UL SPS. In some cases, DCI activation is effective when: (1) the CRC of the DCI is scrambled by SPS-CRNTI, (2) NDI is set to 0, and (3) special SPS activation PDCCH verification is set according to a predetermined pattern. In some cases, one field in the field is a cyclic shift for DMRS and is set to 000. Therefore, multiple UEs may not be allocated the same frequency resources because the base station cannot distinguish them. Therefore, in some cases, in order to allow contention-based uplink transmission while keeping FAR low, the base station can still set the DMRS CS field in a fixed manner, but can give a cyclic shift for DMRS transmission for each UE as part of the SPS configuration for the associated UE.

[0086] Figure 4 Examples of a process flow 400 supporting uplink transmission techniques in low-latency wireless communication are shown according to various aspects of this disclosure. In some examples, process flow 400 may implement aspects of wireless communication system 100. Process flow 400 may include the configuration and transmission of SPS between UE 115-b and base station 105-a. Base station 105-b may be Figure 1 or Figure 2 Example of base station 105, and UE 115-b can be Figure 1 or Figure 2 Example of UE 115. Initially, base station 105-b and UE 115-b can establish connection 405. This connection establishment can be performed using established connection establishment techniques. In some cases, connection 405 can have broadband connection bandwidth.

[0087] At 410, base station 105-b can allocate SPS resources for UE 115-b. SPS resources can be sTTI resources that can be used for SPS transmission. In some cases, base station 105-b can identify configuration information associated with SPS transmission, such as index values ​​used by UE 115-b to identify power control information in subsequent DCI transmissions, cyclic shift information that can be used to apply cyclic shifts to the reference signal, the number of HARQ procedures, the SPS period, etc. Base station 105-b can send SPS configuration 415 to UE 115-b. At 420, UE 115-b can configure SPS according to the SPS configuration received from base station 105-b.

[0088] At 425, base station 105-b can determine the TPC for SPS sTTI transmission. In some cases, the TPC can be determined based on a closed-loop power control technique (such as the established closed-loop power control technique used in LTE). Base station 105-b can send DCI 430 with the TPC to UE 115-b. At 440, the base station can determine SPS activation and can send DCI 445 with SPS activation to UE 115-b.

[0089] At 435, UE 115-b can receive DCI 430 and identify the TPC based on the UE SPS configuration. In some cases, the SPS configuration may include an index for UE 115-b, which can be used as a pointer to the set of TPC information transmitted in DCI 430. UE 115-b can then receive DCI 445 with SPS activation, and at 450, the SPS uplink transmission can be formatted. In some cases, UE 115-b can transmit DMRS in the SPS transmission, and at 455, the DMRS can be formatted by applying a cyclic shift as part of the UE 115-b SPS configuration. In some examples, UE 115-b can configure the DMRS according to configuration information for transmission in one or more TTIs in response to an activation command. Additionally, UE 115-b can apply a cyclic shift to the DMRS, where the configuration information indicates the cyclic shift. Then, UE 115-b can use sTTI to send one or more SPS uplink transmissions based on the configured SPS resources. At 465, base station 105-b can decode the SPS based on DMRS, using DMRS for channel estimation, UE differentiation, and identification of the UE sending the SPS transmission. In some cases, in addition to SPS, base station 105-b can also provide UE 115-b with a schedule-based sTTI UL resource allocation, which can be provided in the DCI associated with the sTTI, and UE 115-b can receive the schedule-based sTTI UL resource allocation and use it for sTTI transmission. In some cases, TPC commands provided by base station 105-b can be applied to both sPUCCH and sPUSCH transmissions.

[0090] Figure 5A block diagram 500 of a wireless device 505 supporting uplink transmission technology in low-latency wireless communication is shown according to an aspect of this disclosure. The wireless device 505 may be an example of an aspect of a UE 115 as described herein. The wireless device 505 may include a receiver 510, a UE communication manager 515, and a transmitter 520. The wireless device 505 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0091] Receiver 510 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to uplink transmission techniques in low-latency wireless communication). The information can be transmitted to other components of the device. Receiver 510 can serve as a reference. Figure 8 Examples of aspects of the transceiver 835 are described. The receiver 510 can use a single antenna or an array of antennas.

[0092] UE Communication Manager 515 can be used as a reference. Figure 8 An example of an aspect of the UE communication manager 815 described.

[0093] At least some of the UE communication manager 515 and / or its various sub-components can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functionality of at least some of the UE communication manager 515 and / or its various sub-components can be performed by a general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic unit, discrete hardware component, or any combination thereof, designed to perform the functions described in this disclosure. At least some of the UE communication manager 515 and / or its various sub-components can be physically located in various locations, including distributed such that some functions are implemented by one or more physical devices at different physical locations. In some examples, according to various aspects of this disclosure, at least some of the UE communication manager 515 and / or its various sub-components can be separate and distinct components. In other examples, at least some of the UE communication manager 515 and / or its various sub-components may be combined with one or more other hardware components, including but not limited to I / O components, transceivers, network servers, another computing device, one or more other components described in this disclosure, or combinations thereof, in accordance with various aspects of this disclosure.

[0094] The UE communication manager 515 may: receive SPS activation for transmitting uplink transmission in a first TTI set, wherein the first TTI set has a first TTI duration shorter than the second TTI duration of a second TTI set; during the first TTI in the second TTI set, receive first uplink power control information for setting a first uplink transmission power for at least one TTI in the first TTI set, and second uplink power control information for setting a second uplink transmission power for at least one TTI in the second TTI set; and set the first uplink power for at least one TTI in the first TTI set.

[0095] In one example, the UE communication manager 515 may further: receive at the UE an SPS configuration for transmitting uplink transmissions in a first TTI set, wherein the first TTI set has a first TTI duration shorter than the second TTI duration of a second TTI set, and wherein the SPS configuration includes configuration information for applying DMRS to be transmitted in one or more TTIs in the first TTI set; receive an activation command for activating the SPS configuration during the first TTI in the second TTI set; format the DMRS for transmissions in one or more TTIs in the first TTI set in response to the activation command; and apply a cyclic shift to the DMRS. In other cases, the UE may: configure the DMRS according to the configuration information for transmissions in one or more TTIs in response to the activation command; and may transmit the configured DMRS in at least one TTI in the first TTI set. Additionally, the UE may apply a cyclic shift to the DMRS, wherein the configuration information at least indicates a cyclic shift. In another example, the UE communication manager 515 may also: receive at the UE an SPS configuration for transmitting uplink transmissions in a first TTI set, wherein the first TTI set has a first TTI duration shorter than the second TTI duration of a second TTI set, and wherein the SPS configuration includes configuration information to be configured for DMRS transmitted in one or more TTIs in the first TTI set; receive an activation command for activating the SPS during the first TTI in the second TTI set; format the DMRS for transmissions in one or more TTIs in the first TTI set in response to the activation command; and configure information for the DMRS.

[0096] Transmitter 520 can transmit signals generated by other components of the device. In some examples, transmitter 520 can be co-located with receiver 510 in a transceiver module. For example, transmitter 520 can be a reference... Figure 8 Examples of aspects of the transceiver 835 described. The transmitter 520 can use a single antenna or an array of antennas.

[0097] Transmitter 520 may use the first uplink power to transmit at least one TTI in the first TTI set according to SPS permission, and transmit cyclically shifted DMRS in at least one TTI in the first TTI set.

[0098] Figure 6 A block diagram 600 of a wireless device 605 supporting uplink transmission technology in low-latency wireless communication is shown according to aspects of this disclosure. The wireless device 605 may be a reference... Figure 5 Examples of aspects of the described wireless device 505 or UE 115. Wireless device 605 may include a receiver 610, a UE communication manager 615, and a transmitter 620. Wireless device 605 may also include one or more processors, memory coupled to the one or more processors, and instructions stored in the memory that can be executed by the one or more processors to enable the one or more processors to perform the features discussed herein. Each of these components may communicate with each other (e.g., via one or more buses).

[0099] Receiver 610 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to uplink transmission techniques in low-latency wireless communication). The information can be transmitted to other components of the device. Receiver 610 can serve as a reference. Figure 8 Examples of aspects of the transceiver 835 described. The receiver 610 can use a single antenna or an array of antennas.

[0100] UE Communication Manager 615 can be used as a reference Figure 8 Examples of aspects of the described UE communication manager 615 are provided. In some cases, the UE communication manager 615 may be a processor (e.g., a transceiver processor, a wireless processor, or a receiver processor). The processor may be coupled to memory and execute instructions stored in the memory that enable the processor to perform or facilitate the features discussed herein. The UE communication manager 615 may also include an SPS manager 625, a DCI manager 630, a power control component 635, and a reference signal manager 640.

[0101] SPS Manager 625 may: receive SPS activation for transmitting uplink transmissions in a first TTI set, wherein the first TTI set has a first TTI duration shorter than the second TTI duration of a second TTI set. In some cases, SPS Manager 625 may be a processor. The processor may be coupled to memory and execute instructions stored in memory that enable the processor to perform or facilitate the features discussed herein. In some cases, SPS Manager 625 may receive an index value for identifying first uplink power control information from a set of different power control information provided in the first TTI in the second TTI set. In some cases, SPS Manager 625 may receive a cyclic shift in an SPS configuration for application of DMRS to be transmitted in one or more TTIs in the first TTI set. In some cases, multiple UEs are configured with non-orthogonal SPS resources. In some cases, the activation command includes a field for indicating a DMRS cyclic shift, which is ignored when the UE applies the cyclic shift according to the SPS configuration.

[0102] The DCI manager 630 may: during a first TTI in a second TTI set, receive first uplink power control information for setting a first uplink transmission power for at least one TTI in the first TTI set, and second uplink power control information for setting a second uplink transmission power for at least one TTI in the second TTI set. In some cases, the DCI manager 630 may be a processor. The processor may be coupled to memory and execute instructions stored in the memory that enable the processor to perform or facilitate the features discussed herein. In some cases, the first and second uplink power control information are transmitted in the DCI. In some cases, the DCI uses DCI format 3 / 3A. In some cases, a DMRS cyclic shift indicated in the activation command is used to enhance the reliability of the activation command and reduce the FAR for the activation command. In some cases, the activation command is received from the base station in the DCI. In some cases, the DCI has a predetermined DCI format (i.e., DCI format 0) for activating SPS. In some cases, the activation command is verified by confirming that the CRC of the activation command is scrambled using the SPS identifier configured at the UE, and that one or more fields of the DCI (including the DMRS cyclic shift field) are set to values ​​of a predetermined mode. In some cases, the DCI can be any of format 3 or format 3a, and the DCI can be transmitted in the traditional LTE PDCCH area.

[0103] Power control component 635 can set a first uplink power for at least one TTI in the first TTI set. In some cases, power control component 635 may be a processor. The processor may be coupled to memory and execute instructions stored in the memory that enable the processor to perform or facilitate the features discussed herein. In some cases, uplink power control for the first TTI set is performed independently of uplink power control for the second TTI set. In some cases, uplink power control for the first TTI set is performed independently of uplink power control for the third TTI set having the duration of the first TTI. In some cases, at least one TTI in the first TTI set is transmitted using the first uplink power in a subframe, the subframe being the next consecutive subframe after the reception of the first uplink power control information.

[0104] Reference signal manager 640 may: format the DMRS for transmissions in one or more TTIs within a first TTI set in response to an activation command; and apply a cyclic shift to the DMRS. In some cases, reference signal manager 640 may be a processor. The processor may be coupled to memory and execute instructions stored in memory that enable the processor to perform or facilitate the features discussed herein. In an example, reference signal manager 640 may: format the DMRS for transmissions in one or more TTIs within a first TTI set in response to an activation command; and configure information for the DMRS. In some cases, reference signal manager 640 may: configure the DMRS according to configuration information for transmissions in one or more TTIs within a first plurality of TTIs in response to an activation command; and may transmit the configured DMRS in at least one TTI within the first TTI set.

[0105] Transmitter 620 can transmit signals generated by other components of the device. In some examples, transmitter 620 can be co-located with receiver 610 in a transceiver module. For example, transmitter 620 can be a reference... Figure 8 Examples of aspects of the transceiver 835 described. The transmitter 620 can use a single antenna or an array of antennas.

[0106] Figure 7 According to aspects of this disclosure, a block diagram 700 of a UE communication manager 715 supporting uplink transmission technology in low-latency wireless communication is shown. The UE communication manager 715 may be a reference... Figure 5 , Figure 6 and Figure 8Examples of aspects of the described UE communication manager 515, UE communication manager 615, or UE communication manager 815. UE communication manager 715 may include SPS manager 720, DCI manager 725, power control component 730, reference signal manager 735, and RRC manager 740. Each of these modules may communicate with each other directly or indirectly (e.g., via one or more buses).

[0107] SPS Manager 720 may: receive SPS activation for transmitting uplink transmissions in a first TTI set, wherein the first TTI set has a first TTI duration shorter than the second TTI duration of a second TTI set. In some cases, SPS Manager 720 may be a processor. The processor may be coupled to memory and execute instructions stored in memory that enable the processor to perform or facilitate the features discussed herein. In some cases, SPS Manager 720 may receive an index value for identifying first uplink power control information from a set of different power control information provided in the first TTI in the second TTI set. In some cases, SPS Manager 720 may receive a cyclic shift in an SPS configuration for application of DMRS to be transmitted in one or more TTIs in the first TTI set. In some cases, multiple UEs are configured with non-orthogonal SPS resources. In some cases, the activation command includes a field for indicating a DMRS cyclic shift, which is ignored when the UE applies the cyclic shift according to the SPS configuration.

[0108] The DCI manager 725 may: during a first TTI in a second TTI set, receive first uplink power control information for setting a first uplink transmission power for at least one TTI in the first TTI set, and second uplink power control information for setting a second uplink transmission power for at least one TTI in the second TTI set. In some cases, the DCI manager 725 may be a processor. The processor may be coupled to memory and execute instructions stored in the memory that enable the processor to perform or facilitate the features discussed herein. In some cases, the first and second uplink power control information are transmitted in the DCI. In some cases, the DCI uses DCI format 3 / 3A. In some cases, a DMRS cyclic shift indicated in the activation command is used to enhance the reliability of the activation command and reduce the FAR for the activation command. In some cases, the activation command is received from the base station in the DCI. In some cases, the DCI has a predetermined DCI format (i.e., DCI format 0) for activating SPS. In some cases, the activation command is confirmed by verifying that the CRC of the activation command is scrambled by the SPS identifier configured at the UE, and that one or more fields of the DCI (including the DMRS cyclic shift field) are set to values ​​of a predetermined mode.

[0109] Power control component 730 can set a first uplink power for at least one TTI in a first TTI set. In some cases, power control component 730 may be a processor. The processor may be coupled to memory and execute instructions stored in the memory that enable the processor to perform or facilitate the features discussed herein. In some cases, uplink power control for the first TTI set is performed independently of uplink power control for a second TTI set. In some cases, uplink power control for the first TTI set is performed independently of uplink power control for a third TTI set having the duration of the first TTI. In some cases, at least one TTI in the first TTI set is transmitted using the first uplink power in a subframe, the subframe being the next consecutive subframe after the reception of the first uplink power control information.

[0110] Reference signal manager 735 may: format the DMRS for transmissions in one or more TTIs within a first TTI set in response to an activation command; and apply a cyclic shift to the DMRS. In some cases, reference signal manager 735 may be a processor. The processor may be coupled to memory and execute instructions stored in memory that enable the processor to perform or facilitate the features discussed herein. In an example, reference signal manager 735 may: format the DMRS for transmissions in one or more TTIs within a first TTI set in response to an activation command; and configure information for the DMRS. In some cases, reference signal manager 735 may: configure the DMRS according to configuration information for transmissions in one or more TTIs within a first plurality of TTIs in response to an activation command; and may transmit the configured DMRS in at least one TTI within the first TTI set.

[0111] The RRC manager 740 can receive and process RRC signaling. In some cases, the index value is received in a configuration information element via RRC signaling. In some cases, the RRC manager 740 can be a processor. The processor can be coupled to memory and execute instructions stored in memory that enable the processor to perform or facilitate the features discussed herein. In some cases, the index value is received in the tcp-Index-sTTI field of the TPC-PDCCH-Config information element. In some cases, the index values ​​can be set separately for PUSCH and PUCCH.

[0112] Figure 8 Figures of a system 800 including a device 805 supporting uplink transmission techniques in low-latency wireless communication are shown according to various aspects of this disclosure. Device 805 may be as described herein (e.g., referenced to...). Figure 5 and Figure 6 Examples of components of the described wireless device 505, wireless device 605, or UE 115, or including such components, are described. Device 805 may include components for bidirectional voice and data communication, including components for transmitting and receiving communications, including a UE communication manager 815, a processor 820, a memory 825, software 830, a transceiver 835, an antenna 840, and an I / O controller 845. These components may communicate electronically via one or more buses (e.g., bus 810). Device 805 may communicate wirelessly with one or more base stations 105.

[0113] Processor 820 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, central processing units (CPUs), microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or any combination thereof). In some cases, processor 820 may be configured to use a memory controller to operate a memory array. In other cases, the memory controller may be integrated into processor 820. Processor 820 may be configured to execute computer-readable instructions stored in memory to perform various functions (e.g., functions or tasks supporting uplink transmission technologies in low-latency wireless communications).

[0114] Memory 825 may include random access memory (RAM) and read-only memory (ROM). Memory 825 may store computer-readable, computer-executable software 830, including instructions that, when executed, cause a processor to perform the various functions described herein. In some cases, among other things, memory 825 may include a basic input / output system (BIOS) that controls basic hardware or software operations, such as interaction with peripheral components or devices.

[0115] Software 830 may include code for implementing aspects of this disclosure, including code for supporting uplink transmission techniques in low-latency wireless communications. Software 830 may be stored in a non-transitory computer-readable medium such as system memory or other memory. In some cases, software 830 may not be directly executable by a processor, but may enable a computer (e.g., when compiled and executed) to perform the functions described herein.

[0116] As described herein, transceiver 835 can communicate bidirectionally via one or more antennas, wired or wireless links. For example, transceiver 835 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. Transceiver 835 may also include a modem for modulating packets and providing modulated packets to the antenna for transmission, and for demodulating packets received from the antenna.

[0117] In some cases, a wireless device may include a single antenna 840. However, in other cases, the device may have more than one antenna 840, which is capable of transmitting or receiving multiple wireless transmissions simultaneously.

[0118] The I / O controller 845 can manage input and output signals for device 805. The I / O controller 845 can also manage peripheral devices not integrated into device 805. In some cases, the I / O controller 845 can represent a physical connection or port to an external peripheral device. In some cases, the I / O controller 845 can use, for example... The operating system or other known operating systems. In other cases, the I / O controller 845 may represent or interact with a modem, keyboard, mouse, touchscreen, or similar device. In some cases, the I / O controller 845 may be implemented as part of a processor. In some cases, a user may interact with the device 805 via the I / O controller 845 or via hardware components controlled by the I / O controller 845.

[0119] Figure 9 A block diagram 900 of a wireless device 905 supporting uplink transmission technology in low-latency wireless communication is shown according to an aspect of this disclosure. The wireless device 905 may be an example of an aspect of a base station 105 as described herein. The wireless device 905 may include a receiver 910, a base station communication manager 915, and a transmitter 920. The wireless device 905 may also include one or more processors, memory coupled to the one or more processors, and instructions stored in the memory that can be executed by the one or more processors to enable the one or more processors to perform the features discussed herein. Each of these components may communicate with each other (e.g., via one or more buses).

[0120] Receiver 910 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to uplink transmission techniques in low-latency wireless communication). This information can be transmitted to other components of the device. Receiver 910 can serve as a reference. Figure 12 Examples of aspects of the transceiver 1235 are described. The receiver 910 can use a single antenna or an array of antennas.

[0121] Receiver 910 can receive one or more uplink transmissions in the first TTI set, including DMRS transmissions.

[0122] Base Station Communication Manager 915 can be used as a reference Figure 12 Examples of aspects of the described base station communication manager 1215.

[0123] At least some of the sub-components of the base station communication manager 915 and / or its various sub-components may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functionality of at least some of the sub-components of the base station communication manager 915 and / or its various sub-components may be performed by a general-purpose processor, DSP, ASIC, FPGA, or other programmable logic device, discrete gate or transistor logic unit, discrete hardware component, or any combination thereof designed to perform the functions described in this disclosure. At least some of the sub-components of the base station communication manager 915 and / or its various sub-components may be physically located in various locations, including distributed such that some functions are implemented by one or more physical devices at different physical locations. In some examples, according to various aspects of this disclosure, at least some of the sub-components of the base station communication manager 915 and / or its various sub-components may be separate and distinct components. In other examples, at least some of the base station communication manager 915 and / or its various sub-components may be combined with one or more other hardware components, including but not limited to I / O components, transceivers, network servers, another computing device, one or more other components described in this disclosure, or combinations thereof, in accordance with various aspects of this disclosure.

[0124] The base station communication manager 915 can: send an SPS activation to the UE for transmitting uplink transmission in a first TTI set, wherein the first TTI set has a first TTI duration that is shorter than the second TTI duration of the second TTI set; and determine first uplink power control information for setting a first uplink transmission power at the UE for at least one TTI in the first TTI set, and second uplink power control information for setting a second uplink transmission power for at least one TTI in the second TTI set.

[0125] In one example, the base station communication manager 915 may further: send an SPS configuration to the UE for uplink transmissions from the UE in a first TTI set, wherein the first TTI set has a first TTI duration shorter than the second TTI duration of a second TTI set, and wherein the SPS configuration includes a cyclic shift to be applied to DMRS transmitted in one or more TTIs in the first TTI set (and, in some examples, configuration information); send an activation command to the UE to activate the SPS during the first TTI in the second TTI set; apply a cyclic shift to DMRS; and decode one or more uplink transmissions based on the cyclically shifted DMRS. In another example, the base station communication manager 915 may also: send an SPS configuration to the UE for uplink transmissions from the UE in a first TTI set, wherein the first TTI set has a first TTI duration shorter than the second TTI duration of a second TTI set, and wherein the SPS configuration includes configuration information for DMRS application to be sent in one or more TTIs in the first TTI set; send an activation command to the UE to activate the SPS during the first TTI in the second TTI set; process the DMRS according to the configuration information; and decode one or more uplink transmissions based on the processed DMRS.

[0126] Transmitter 920 can transmit signals generated by other components of the device. In some examples, transmitter 920 can be co-located with receiver 910 in a transceiver module. For example, transmitter 920 can be a reference... Figure 12 Examples of aspects of the transceiver 1235 are described. The transmitter 920 can use a single antenna or an array of antennas.

[0127] Base station 920 can send first uplink power control information and second uplink power control information to UE during the first TTI in the second TTI set.

[0128] Figure 10 A block diagram 1000 of a wireless device 1005 supporting uplink transmission technology in low-latency wireless communication is shown according to aspects of this disclosure. The wireless device 1005 may be a reference... Figure 9 Examples of aspects of the described wireless device 905 or base station 105. Wireless device 1005 may include a receiver 1010, a base station communication manager 1015, and a transmitter 1020. Wireless device 1005 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0129] Receiver 1010 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to uplink transmission techniques in low-latency wireless communication). The information can be transmitted to other components of the device. Receiver 1010 can serve as a reference. Figure 12 Examples of aspects of the transceiver 1235 are described. The receiver 1010 can use a single antenna or an array of antennas.

[0130] Base Station Communication Manager 1015 can be used as a reference. Figure 12 Examples of aspects of the described base station communication manager 1215.

[0131] The base station communication manager 1015 may also include an SPS manager 1025, a power control component 1030, and a reference signal manager 1035.

[0132] SPS Manager 1025 may send an SPS activation to the UE for transmitting uplink transmissions in a first TTI set. In some cases, SPS Manager 1025 may be a processor. The processor may be coupled to memory and execute instructions stored in memory that enable the processor to perform or facilitate the features discussed herein. In some cases, SPS Manager 1025 may configure the UE with an index value for identifying first uplink power control information from a set of different power control information provided in the first TTI within a second TTI set, wherein the first TTI set has a first TTI duration shorter than the second TTI duration of the second TTI set. In some cases, SPS Manager 1025 may send an SPS configuration to the UE for uplink transmissions from the UE in the first TTI set, wherein the SPS configuration includes a cyclic shift of DMRS applications to be transmitted in one or more TTIs in the first TTI set. SPS Manager 1025 may also send an activation command to the UE for activating SPS during the first TTI in the second TTI set. In some cases, multiple UEs are configured with non-orthogonal SPS resources.

[0133] The power control component 1030 may determine the following: first uplink power control information for setting a first uplink transmission power at the UE for at least one TTI in a first TTI set, and second uplink power control information for setting a second uplink transmission power for at least one TTI in a second TTI set. In some cases, the power control component 1030 may be a processor. The processor may be coupled to memory and execute instructions stored in the memory that enable the processor to perform or facilitate the features discussed herein. In some cases, uplink power control for the first TTI set is performed independently of uplink power control for the second TTI set. In some cases, uplink power control for the first TTI set is performed independently of uplink power control for a third TTI set having a first TTI duration.

[0134] The reference signal manager 1035 processes the DMRS according to configuration information and decodes one or more uplink transmissions based on the processed DMRS. In some cases, the reference signal manager 1035 may be a processor. The processor may be coupled to memory and execute instructions stored in memory that enable the processor to perform or facilitate the features discussed herein.

[0135] Transmitter 1020 can transmit signals generated by other components of the device. In some examples, transmitter 1020 can be co-located with receiver 1010 in a transceiver module. For example, transmitter 1020 can be a reference... Figure 12 Examples of aspects of the transceiver 1235 are described. The transmitter 1020 can use a single antenna or an array of antennas.

[0136] Figure 11 A block diagram 1100 of a base station communication manager 1115 supporting uplink transmission technology in low-latency wireless communication is shown according to aspects of this disclosure. The base station communication manager 1115 may be a reference... Figure 9 , Figure 10 and Figure 12 Examples of aspects of the described base station communication manager 1215. The base station communication manager 1115 may include an SPS manager 1120, a power control component 1125, a reference signal manager 1130, a DCI manager 1135, and an RRC manager 1140. Each of these modules may communicate with each other directly or indirectly (e.g., via one or more buses).

[0137] SPS manager 1120 may send SPS activation to the UE for transmitting uplink transmissions in a first TTI set. In some cases, SPS manager 1120 may be a processor. The processor may be coupled to memory and execute instructions stored in memory that enable the processor to perform or facilitate the features discussed herein. In some cases, SPS manager 1120 may configure the UE with an index value for identifying first uplink power control information from a set of different power control information provided in the first TTI in a second TTI set, wherein the first TTI set has a first TTI duration shorter than the second TTI duration of the second TTI set. In some cases, SPS manager 1120 may send SPS configuration to the UE for uplink transmissions from the UE in the first TTI set, wherein the SPS configuration includes a cyclic shift of DMRS applications to be transmitted in one or more TTIs in the first TTI set. SPS manager 1120 may also send an activation command to the UE for activating SPS during the first TTI in the second TTI set. In some cases, multiple UEs are configured with non-orthogonal SPS resources.

[0138] The power control component 1125 may determine the following: first uplink power control information for setting a first uplink transmission power at the UE for at least one TTI in a first TTI set, and second uplink power control information for setting a second uplink transmission power for at least one TTI in a second TTI set. In some cases, the power control component 1125 may be a processor. The processor may be coupled to memory and execute instructions stored in the memory that enable the processor to perform or facilitate the features discussed herein. In some cases, uplink power control for the first TTI set is performed independently of uplink power control for the second TTI set. In some cases, uplink power control for the first TTI set is performed independently of uplink power control for a third TTI set having a first TTI duration.

[0139] The reference signal manager 1130 can process DMRS according to configuration information, and in some examples, can apply cyclic shifts to the DMRS indicated in the configuration information, and decode one or more uplink transmissions based on the processed DMRS. In some cases, the reference signal manager 1130 can be a processor. The processor can be coupled to memory and execute instructions stored in memory that enable the processor to perform or facilitate the features discussed herein.

[0140] DCI manager 1135 can identify DCIs and transmit DCIs to one or more UEs. In some cases, DCI manager 1135 can be a processor. The processor can be coupled to memory and execute instructions stored in memory that enable the processor to perform or facilitate the features discussed herein. In some cases, first uplink power control information and second uplink power control information are transmitted in the DCI. In some cases, the activation command includes a field for indicating a DMRS cyclic shift, which the UE ignores when a cyclic shift is applied to the DMRS. RRC manager 1140 can manage RRC signaling. In some cases, the index value is transmitted to the UE via RRC signaling in a configuration information element.

[0141] Figure 12 A system 1200 including a device 1205 supporting uplink transmission technology in low-latency wireless communication is illustrated according to aspects of this disclosure. Device 1205 may be, for example, as described herein (see reference ). Figure 1 The example of base station 105 described herein or components including base station 105 may be described. Device 1205 may include components for bidirectional voice and data communication, including components for transmitting and receiving communications, including base station communication manager 1215, processor 1220, memory 1225, software 1230, transceiver 1235, antenna 1240, network communication manager 1245, and inter-station communication manager 1250. These components may communicate electronically via one or more buses (e.g., bus 1210). Device 1205 may communicate wirelessly with one or more UEs 115.

[0142] Processor 1220 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, CPUs, microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or any combination thereof). In some cases, processor 1220 may be configured to use a memory controller to operate a memory array. In other cases, the memory controller may be integrated into processor 1220. Processor 1220 may be configured to execute computer-readable instructions stored in memory to perform various functions (e.g., functions or tasks supporting uplink transmission technologies in low-latency wireless communications).

[0143] Memory 1225 may include RAM and ROM. Memory 1225 may store computer-readable, computer-executable software 1230, including instructions that, when executed, cause a processor to perform the various functions described herein. In some cases, among other things, memory 1225 may include a BIOS that controls basic hardware or software operations, such as interaction with peripheral components or devices.

[0144] Software 1230 may include code for implementing aspects of this disclosure, including code for supporting uplink transmission techniques in low-latency wireless communications. Software 1230 may be stored in a non-transitory computer-readable medium such as system memory or other memory. In some cases, software 1230 may not be directly executable by a processor, but may enable a computer (e.g., when compiled and executed) to perform the functions described herein.

[0145] As described herein, transceiver 1235 can communicate bidirectionally via one or more antennas, wired or wireless links. For example, transceiver 1235 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. Transceiver 1235 may also include a modem for modulating packets and providing modulated packets to the antenna for transmission, and demodulating packets received from the antenna.

[0146] In some cases, a wireless device may include a single antenna 1240. However, in other cases, the device may have more than one antenna 1240, which is capable of transmitting or receiving multiple wireless transmissions simultaneously.

[0147] The network communication manager 1245 can manage communication with the core network (e.g., via one or more wired backhaul links). For example, the network communication manager 1245 can manage the transmission of data communication by client devices (such as one or more UEs 115).

[0148] Inter-site communication manager 1250 can manage communication with other base stations 105, and may include a controller or scheduler for cooperating with other base stations 105 to control communication with UE 115. For example, inter-site communication manager 1250 can coordinate the scheduling of transmissions to UE 115 for various interference mitigation techniques such as beamforming and / or joint transmission. In some examples, inter-site communication manager 1250 can provide an X2 interface within Long Term Evolution (LTE) / LTE-A wireless communication network technology to facilitate communication between base stations 105.

[0149] Figure 13 A flowchart illustrating a method 1300 for uplink transmission techniques in low-latency wireless communication is shown according to aspects of this disclosure. As described herein, the operation of method 1300 can be implemented by UE 115 or its components. For example, the operation of method 1300 can be performed by, as referenced... Figures 5 to 8The UE communication manager described herein is used for execution. In some examples, the UE 115 may execute a set of code to control the functional units of the device to perform the functions described below. Alternatively, the UE 115 may use dedicated hardware to perform aspects of the functions described below.

[0150] At 1305, UE 115 can receive SPS activation for transmitting uplink transmissions in a first plurality of TTIs, wherein the first plurality of TTIs has a shorter duration than the duration of the second TTI in a second plurality of TTIs. Operation 1305 can be performed according to the methods described herein. In some examples, aspects of operation 1305 can be derived from references... Figures 5 to 8 The SPS manager described is used to execute this.

[0151] At 1310, UE 115 may receive, during the first TTI of the second plurality of TTIs: first uplink power control information for setting a first uplink transmission power for at least one TTI of the first plurality of TTIs, and second uplink power control information for setting a second uplink transmission power for at least one TTI of the second plurality of TTIs. Operation 1310 can be performed according to the method described herein. In some examples, aspects of the operation of 1310 may be derived from, as referenced... Figures 5 to 8 The described DCI manager is used to execute this. In some cases, the power control commands for PUCCH and PUSCH can be different, and different TPC indexes can be configured accordingly.

[0152] At 1315, UE 115 can set a first uplink power for at least one of a plurality of TTIs. The operation of 1315 can be performed according to the methods described herein. In some examples, aspects of the operation of 1315 can be derived from, as referenced... Figures 5 to 8 The power control component described is used to perform this.

[0153] At 1320, UE 115 may use the first uplink power to transmit at least one of a first plurality of TTIs, subject to SPS permission. The operation at 1320 can be performed according to the methods described herein. In some examples, aspects of the operation at 1320 may be derived from, as referenced... Figures 5 to 8 The transmitter described is used to execute this.

[0154] Figure 14 A flowchart illustrating a method 1400 for uplink transmission techniques in low-latency wireless communication is shown according to aspects of this disclosure. As described herein, the operation of method 1400 can be implemented by UE 115 or its components. For example, the operation of method 1400 can be performed by, as referenced... Figures 5 to 8The UE communication manager described herein is used for execution. In some examples, the UE 115 may execute a set of code to control the functional units of the device to perform the functions described below. Alternatively, the UE 115 may use dedicated hardware to perform aspects of the functions described below.

[0155] At 1405, UE 115 may receive an index value used to identify a first uplink power control information from multiple different power control information provided in a first TTI within a second plurality of TTIs. Operation at 1405 can be performed according to the methods described herein. In some examples, aspects of operation at 1405 may be derived from, as referenced... Figures 5 to 8 The SPS manager described is used to execute this.

[0156] At 1410, UE 115 may receive SPS activation for transmitting uplink transmissions in a first plurality of TTIs, wherein the first plurality of TTIs has a shorter first TTI duration than the second TTI duration of a second plurality of TTIs. Operation 1410 can be performed according to the methods described herein. In some examples, aspects of the operation of 1410 may be derived from references... Figures 5 to 8 The SPS manager described is used to execute this.

[0157] At 1415, UE 115 may receive, during the first TTI of the second plurality of TTIs: first uplink power control information for setting a first uplink transmission power for at least one TTI of the first plurality of TTIs, and second uplink power control information for setting a second uplink transmission power for at least one TTI of the second plurality of TTIs. Operation 1415 can be performed according to the methods described herein. In some examples, aspects of operation 1415 may be derived from, as referenced... Figures 5 to 8 The described DCI manager is used to execute this.

[0158] At 1420, UE 115 can set the first uplink power for at least one of the first plurality of TTIs. The operation at 1420 can be performed according to the methods described herein. In some examples, aspects of the operation at 1420 can be derived from, as referenced... Figures 5 to 8 The power control component described is used to perform this.

[0159] At 1425, UE 115 may use the first uplink power to transmit at least one of a first plurality of TTIs, subject to SPS permission. The operation at 1425 can be performed according to the methods described herein. In some examples, aspects of the operation at 1425 may be derived from, as referenced... Figures 5 to 8 The transmitter described is used to execute this.

[0160] Figure 15 A flowchart illustrating a method 1500 for uplink transmission techniques in low-latency wireless communication is shown according to aspects of this disclosure. As described herein, the operation of method 1500 can be implemented by base station 105 or components thereof. For example, the operation of method 1500 can be implemented by, as referenced... Figures 9 to 12 The base station communication manager described herein performs this function. In some examples, base station 105 may execute a set of code to control the functional units of the device to perform the functions described below. Alternatively, base station 105 may use dedicated hardware to perform aspects of the functions described below.

[0161] At point 1505, base station 105 may send an SPS activation to the UE for transmitting uplink transmission in a first plurality of TTIs, wherein the first plurality of TTIs has a shorter duration than the duration of the second TTI in a second plurality of TTIs. The operation at point 1505 can be performed according to the method described herein. In some examples, aspects of the operation at point 1505 may be derived from, as referenced... Figures 9 to 12 The SPS manager described is used to execute this.

[0162] At 1510, base station 105 can determine the following: first uplink power control information for setting a first uplink transmission power at the UE for at least one of a first plurality of TTIs, and second uplink power control information for setting a second uplink transmission power for at least one of a second plurality of TTIs. Operation 1510 can be performed according to the methods described herein. In some examples, aspects of the operation of 1510 can be derived from, as referenced... Figures 9 to 12 The power control component described is used to perform this.

[0163] At point 1515, base station 105 may send first uplink power control information and second uplink power control information to the UE during the first TTI in a second plurality of TTIs. The operation at point 1515 can be performed according to the method described herein. In some examples, aspects of the operation at point 1515 may be derived from, as referenced... Figures 9 to 12 The transmitter described is used to execute this.

[0164] Figure 16 A flowchart illustrating a method 1600 for uplink transmission techniques in low-latency wireless communication is shown according to aspects of this disclosure. As described herein, the operation of method 1600 can be implemented by base station 105 or its components. For example, the operation of method 1600 can be implemented by reference to... Figures 9 to 12The base station communication manager described herein performs this function. In some examples, base station 105 may execute a set of code to control the functional units of the device to perform the functions described below. Alternatively, base station 105 may use dedicated hardware to perform aspects of the functions described below.

[0165] At 1605, base station 105 can configure the UE with an index value, the index value being used to identify first uplink power control information from multiple different power control information provided in the first TTI within a second plurality of TTIs. Operation 1605 can be performed according to the method described herein. In some examples, aspects of the operation of 1605 can be derived from, as referenced... Figures 9 to 12 The SPS manager described is used to execute this.

[0166] At 1610, base station 105 may send an SPS activation to the UE for transmitting uplink transmission in a first plurality of TTIs, wherein the first plurality of TTIs has a shorter duration than the duration of the second TTI in a second plurality of TTIs. Operation 1610 can be performed according to the methods described herein. In some examples, aspects of the operation of 1610 may be derived from references... Figures 9 to 12 The SPS manager described is used to execute this.

[0167] At 1615, base station 105 can determine the following: first uplink power control information for setting a first uplink transmission power at the UE for at least one of a first plurality of TTIs, and second uplink power control information for setting a second uplink transmission power for at least one of a second plurality of TTIs. The operation at 1615 can be performed according to the method described herein. In some examples, aspects of the operation at 1615 can be derived from, as referenced... Figures 9 to 12 The power control component described is used to perform this.

[0168] At 1620, base station 105 may send first uplink power control information and second uplink power control information to UE during the first TTI in a second plurality of TTIs. The operation at 1620 can be performed according to the method described herein. In some examples, aspects of the operation at 1620 may be derived from, as referenced... Figures 9 to 12 The transmitter described is used to execute this.

[0169] Figure 17 A flowchart illustrating a method 1700 for uplink transmission techniques in low-latency wireless communication is shown according to aspects of this disclosure. As described herein, the operation of method 1700 can be implemented by UE 115 or its components. For example, the operation of method 1700 can be implemented by, as referenced... Figures 5 to 8The UE communication manager described herein is used for execution. In some examples, the UE 115 may execute a set of code to control the functional units of the device to perform the functions described below. Alternatively, the UE 115 may use dedicated hardware to perform aspects of the functions described below.

[0170] At 1705, UE 115 may receive an SPS configuration for transmitting uplink transmissions in a first plurality of TTIs, wherein the first plurality of TTIs has a shorter duration than the duration of a second TTI in a second plurality of TTIs, and wherein the SPS configuration includes a cyclic shift for DMRS applications to be transmitted in one or more of the first plurality of TTIs. Operation 1705 can be performed according to the methods described herein. In some examples, aspects of operation 1705 may be derived from references... Figures 5 to 8 The SPS manager described is used to execute this.

[0171] At 1710, UE 115 may receive an activation command for activating the SPS during the first TTI in a second plurality of TTIs. The operation at 1710 can be performed according to the method described herein. In some examples, aspects of the operation at 1710 may be derived from, as referenced... Figures 5 to 8 The SPS manager described is used to execute this.

[0172] At 1715, UE 115 can configure DMRS according to configuration information for transmission in one or more TTIs in response to an activation command. In some examples, UE 115 can apply a cyclic shift to the DMRS indicated in the configuration information. The operation of 1715 can be performed according to the methods described herein. In some examples, aspects of the operation of 1715 can be determined by reference to [reference]. Figures 5 to 8 The reference signal manager described is used for execution.

[0173] At 1720, UE 115 may transmit configured DMRS in at least one TTI in the first TTI set. In some examples, UE 115 may transmit cyclically shifted DMRS in at least one TTI in the first plurality of TTIs. The operation at 1720 can be performed according to the methods described herein. In some examples, aspects of the operation at 1720 may be determined by reference to [reference]. Figures 5 to 8 The transmitter described is used to execute this.

[0174] Figure 18 A flowchart illustrating a method 1800 for uplink transmission techniques in low-latency wireless communication is shown according to aspects of this disclosure. As described herein, the operation of method 1800 can be implemented by base station 105 or its components. For example, the operation of method 1800 can be implemented by, as referenced... Figures 9 to 12 The base station communication manager described herein performs this function. In some examples, base station 105 may execute a set of code to control the functional units of the device to perform the functions described below. Alternatively, base station 105 may use dedicated hardware to perform aspects of the functions described below.

[0175] At 1805, base station 105 may send an SPS configuration to the UE for uplink transmissions from the UE in a first plurality of TTIs, wherein the first plurality of TTIs has a first TTI duration shorter than the second TTI duration of a second plurality of TTIs, and wherein the SPS configuration includes a cyclic shift of DMRS applications to be transmitted in one or more of the first plurality of TTIs. The operation at 1805 can be performed according to the method described herein. In some examples, aspects of the operation at 1805 may be derived from, as referenced... Figures 9 to 12 The SPS manager described is used to execute this.

[0176] At point 1810, base station 105 may send an activation command to the UE for activating SPS during the first TTI of a second plurality of TTIs. The operation at point 1810 can be performed according to the method described herein. In some examples, aspects of the operation at point 1810 may be derived from, as referenced... Figures 9 to 12 The SPS manager described is used to execute this.

[0177] At 1815, base station 105 may receive one or more uplink transmissions in the first plurality of TTIs, the one or more uplink transmissions including DMRS transmissions. Operation at 1815 can be performed according to the methods described herein. In some examples, aspects of operation at 1815 may be derived from, as referenced... Figures 9 to 12 The receiver described is used to perform this action.

[0178] At 1820, base station 105 can process DMRS according to configuration information. In some examples, base station 105 can apply a cyclic shift of the DMRS indicated in the configuration information to perform channel estimation and user differentiation. The operation of 1820 can be performed according to the methods described herein. In some examples, aspects of the operation of 1820 can be derived from, as referenced... Figures 9 to 12 The reference signal manager described is used for execution.

[0179] At 1825, base station 105 can decode one or more uplink transmissions, at least in part, based on the processed DMRS. The operation of 1825 can be performed according to the methods described herein. In some examples, aspects of the operation of 1825 can be derived from, as referenced... Figures 9 to 12 The reference signal manager described is used for execution.

[0180] It should be noted that the methods described in this paper describe possible implementations, and the operations and steps can be rearranged or otherwise modified, and other implementations are possible. Furthermore, aspects from two or more methods can be combined.

[0181] The techniques described in this article can be used in various wireless communication systems, such as Code Division Multiple Access (CMDA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), and other systems. CDMA systems can implement wireless technologies such as CDMA 2000 and Universal Terrestrial Radio Access (UTRA). CDMA 2000 covers the IS-2000, IS-95, and IS-856 standards. Versions of IS-2000 are commonly referred to as CDMA 2000 1X, 1X, etc. IS-856 (TIA-856) is commonly referred to as CDMA 2000 1xEV-DO, High-Speed ​​Packet Data (HRPD), etc. UTRA includes Wideband CDMA (W-CDMA) and other variations of CDMA. TDMA systems can implement wireless technologies such as Global System for Mobile Communications (GSM).

[0182] OFDMA systems can implement wireless technologies such as Ultra Mobile Broadband (UMB), Evolved UTRA (E-UTRA), IEEE 802.11 (Wi-Fi), and versions including but not limited to 802.11b, 802.11g, 802.11a, 802.11n, 802.11ac, 802.11ad, 802.11ah, 802.11ax, 802.11ay, 802.11ba, IEEE 802.16 (WiMAX), IEEE 802.20, and Flash-OFDM. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). LTE and LTE-A are versions of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, NR, and GSM are described in documents from an organization called the 3rd Generation Partnership Project (3GPP). CDMA2000 and UMB are described in documents from an organization called the 3rd Generation Partnership Project 2 (3GPP2). The technologies described herein can be used in the systems and wireless technologies mentioned herein, as well as other systems and wireless technologies. While aspects of LTE or NR systems may be described for illustrative purposes, and the terms LTE or NR may be used in much of the description, the technologies described herein can be applied beyond LTE or NR applications.

[0183] Macro cells typically cover a relatively large geographic area (e.g., a radius of several kilometers) and allow unrestricted access by UE 115 with a service subscription to a network provider. Small cells, compared to macro cells, can be associated with a lower-power base station 105, and can operate in the same or different (e.g., licensed, unlicensed, etc.) frequency bands as macro cells. Small cells can include picocells, femtocells, and microcells, depending on the example. For example, a picocell can cover a smaller geographic area and allow unrestricted access by UE 115 with a service subscription to a network provider. A femtocell can also cover a smaller geographic area (e.g., a home) and provide restricted access by UE 115 associated with a femtocell (e.g., UE 115 in a Closed Subscriber Group (CSG), UE 115 for a user in a home, etc.). An eNB for a macro cell can be referred to as a macro eNB. An eNB for a small cell can be referred to as a small cell eNB, pico eNB, femtocell eNB, or home eNB. eNB can support one or more (e.g., two, three, four, etc.) cells, and can also use one or more component carriers to support communication.

[0184] One or more wireless communication systems 100 described herein can support synchronous or asynchronous operation. For synchronous operation, base stations 105 can have similar frame timing, and transmissions from different base stations 105 can be approximately time-aligned. For asynchronous operation, base stations 105 can have different frame timing, and transmissions from different base stations 105 may not be time-aligned. The techniques described herein can be used for both synchronous and asynchronous operation.

[0185] The information and signals described herein can be represented using any of a variety of different processes and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips mentioned throughout the above description can be represented by voltage, current, electromagnetic waves, magnetic fields or particles, light fields or particles, or any combination thereof.

[0186] The various illustrative blocks and modules described herein can be implemented or executed using a general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA), or other programmable logic device (PLD), discrete gate or transistor logic device, discrete hardware component, or any combination thereof designed to perform the functions described herein. The general-purpose processor may be a microprocessor, but alternatively, the processor may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors combined with a DSP core, or any other such configuration).

[0187] The functionality described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functionality can be stored on or transmitted thereon as one or more instructions or code. Other examples and implementations are within the scope of this disclosure and the appended claims. For example, due to the characteristics of software, the functionality described herein can be implemented using software executed by a processor, hardware, firmware, hardwiring, or any combination thereof. The features implementing the functionality can also be physically located in various locations, including distributed implementations such that portions of the functionality are implemented in different physical locations.

[0188] Computer-readable media include non-transitory computer storage media and communication media, wherein the communication media includes any medium that facilitates the transfer of a computer program from one location to another. Non-transitory storage media can be any available medium accessible to a general-purpose computer or a special-purpose computer. By way of example, but not limitation, non-transitory computer-readable media can include random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory, compressed optical disc (CD) ROM or other optical disc storage, disk storage or other magnetic storage devices, or any other non-transitory medium that can be used to carry or store desired program code units in the form of instructions or data structures, and any other non-transitory medium accessible to a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Furthermore, any connection is appropriately referred to as computer-readable medium. For example, if software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, these are included within the definition of medium. The terms "disk" and "optical disc" as used in this article include CDs, laser discs, optical discs, digital versatile optical discs (DVDs), floppy disks, and Blu-ray discs. Disks typically copy data magnetically, while optical discs use lasers to copy data optically. The combinations described above also fall within the scope of computer-readable media.

[0189] As used herein (including in the claims), the word "or" in a list of items (e.g., a list of items ending with a phrase such as "at least one of" or "one or more of") indicates an inclusive list, such that, for example, a list of at least one of A, B, or C means A, or B, or C, or AB, or AC, or BC, or ABC (e.g., A and B and C). Furthermore, as used herein, the phrase "based on" should not be construed as a reference to a closed set of conditions. For example, an exemplary step described as "based on condition A" may be based on both condition A and condition B without departing from the scope of this disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "at least partially based on".

[0190] In the accompanying drawings, similar components or features may have the same reference numerals. Furthermore, various components of the same type can be distinguished by a dash followed by a second reference numeral, used to differentiate between similar components. If only the first reference numeral is used in the specification, the description applies to any one of the similar components having the same first reference numeral, regardless of the second or other subsequent reference numerals.

[0191] This document describes exemplary configurations with reference to the accompanying drawings and does not represent all examples that can be implemented or that are within the scope of the claims. The term "exemplary" as used herein means "serving as an example, instance, or illustration" and is not necessarily "preferred" or "advantageous over other examples." The detailed description includes specific details for the purpose of providing an understanding of the described techniques. However, these techniques may be implemented without these specific details. In some instances, well-known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0192] The description herein is provided to enable those skilled in the art to implement or use the present disclosure. Various modifications to the present disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the scope of the disclosure. Therefore, the present disclosure is not limited to the examples and designs described herein, but is consistent with the broadest scope of the principles and novel features disclosed herein.

Claims

1. A method for wireless communication by a user equipment, comprising: receiving a semi-persistent scheduling (SPS) activation for SPS short transmission time interval (sTTI) uplink transmissions; receiving, in a common search space, downlink control information (DCI) including a transmit power control (TPC) for the SPS sTTI uplink transmissions; receiving a non-SPS TPC for non-SPS sTTI uplink transmissions, the non-SPS TPC being received between receiving the TPC for the SPS sTTI and transmitting the SPS sTTI uplink transmissions, the SPS sTTI uplink transmissions and the non-SPS TPC being included in a same transmission interval; and transmitting the SPS sTTI uplink transmissions based on the TPC for the SPS sTTI separately from the non-SPS TPC.

2. An apparatus for wireless communication, comprising: a processor including a combination of computing devices; memory in electronic communication with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: receive a semi-persistent scheduling (SPS) activation for SPS short transmission time interval (sTTI) uplink transmissions; receive, in a common search space, downlink control information (DCI) including a transmit power control (TPC) for the SPS sTTI uplink transmissions; receive a non-SPS TPC for non-SPS sTTI uplink transmissions, the non-SPS TPC being received between receiving the TPC for the SPS sTTI and transmitting the SPS sTTI uplink transmissions, the SPS sTTI uplink transmissions and the non-SPS TPC being included in a same transmission interval; and transmit the SPS sTTI uplink transmissions based on the TPC for the SPS sTTI separately from the non-SPS TPC. ​ ​

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