Network node, method, apparatus, and medium for wireless communication

Abstract

The present disclosure relates to a network node, a method, an apparatus, and a computer readable medium for wireless communication. The network node comprises: one or more memories; and one or more processors coupled to the one or more memories, the one or more processors individually or collectively configured to: transmit a response message associated with a random access message, the response message including an identifier of a user equipment (UE); and receiving hybrid automatic repeat request (HARQ) acknowledgement (ACK) information according to a power control procedure and a transmit power based at least in part on transmitting the response message, where the transmit power is based at least in part on at least one of a message type of the response message, a random access mode associated with the random access message, and a random access mode associated with the random access message. A power control configuration used by a previous transmission of the random access message, or a format of an uplink channel or uplink signal used to confirm successful decoding of the response message.

Description

[0001] This patent application is a divisional application of the following invention patent application:

[0002] Application No.: 201980100883.4

[0003] Filing Date: October 3, 2019

[0004] Title of Invention: Power Control of Hybrid Automatic Repeat Request Feedback Signals in Random Access Technical Field

[0005] Aspects of the present disclosure generally relate to wireless communication and techniques and apparatuses for power control of hybrid automatic repeat request (HARQ) feedback signals in random access. Background Art

[0006] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasting. A typical wireless communication system may employ multiple access techniques that are capable of supporting communication with multiple user equipments (UEs) by sharing available system resources (e.g., bandwidth, transmit power, and / or the like). Examples of such multiple access techniques include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and long term evolution (LTE). LTE / LTE-Advanced is an enhanced set of the universal mobile telecommunications system (UMTS) mobile standard promulgated by the 3rd Generation Partnership Project (3GPP).

[0007] A wireless communication network may include multiple base stations (BSs) capable of supporting communication with multiple user equipments (UEs). A user equipment (UE) may communicate with a base station (BS) via a downlink and an uplink. The downlink (or forward link) refers to the communication link from the BS to the UE, and the uplink (or reverse link) refers to the communication link from the UE to the BS. As will be described in more detail herein, a BS may be referred to as a Node B, gNB, access point (AP), radio head, transmit receive point (TRP), new radio (NR) BS, 5G Node B, and / or the like.

[0008] The above multi-access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different user devices to communicate at the urban, national, regional, or even global levels. New Radio (NR), also known as 5G, is an enhanced set of the LTE mobile standard promulgated by the 3rd Generation Partnership Project (3GPP). NR is designed to better integrate with other open standards by improving spectral efficiency, reducing costs, enhancing services, leveraging new spectrums, and by using Orthogonal Frequency Division Multiplexing with Cyclic Prefix (CP-OFDM) on the Downlink (DL) and CP-OFDM and / or SC-FDM (e.g., also known as Discrete Fourier Transform Spread OFDM (DFT-s-OFDM)) on the Uplink (UL), and to better support mobile broadband Internet access by supporting beamforming, Multiple-Input Multiple-Output (MIMO) antenna technology, and carrier aggregation. However, with the increasing demand for mobile broadband access, LTE and NR technologies need further improvement. Preferably, these improvements should be applicable to other multi-access technologies and the telecommunication standards that adopt these technologies. Summary of the Invention

[0009] In some aspects, a wireless communication method performed by a User Equipment (UE) may include: receiving a response message associated with a random access message, where the response message includes an identifier of the UE; selecting a format of an uplink channel or an uplink signal for confirming successful decoding of the response message; determining a transmission power of Hybrid Automatic Repeat reQuest (HARQ) Acknowledgment (ACK) information based at least in part on at least one of: a message type of the response message, a random access mode associated with the random access message, a power control configuration used by a previous transmission of the random access message, or the format of the uplink channel or the uplink signal; and transmitting the HARQ ACK information using a power control process based at least in part on the transmission power and the identifier.

[0010] In some aspects, a UE for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to: receive a response message associated with a random access message, where the response message includes an identifier of the UE; select a format of an uplink channel or an uplink signal for confirming successful decoding of the response message; determine a transmission power of HARQ ACK information based at least in part on at least one of: a message type of the response message, a random access mode associated with the random access message, a power control configuration used by a previous transmission of the random access message, or the format of the uplink channel or the uplink signal; and transmit the HARQ ACK information using a power control process based at least in part on the transmission power and the identifier.

[0011] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. When executed by one or more processors of a UE, the one or more instructions may cause the one or more processors to: receive a response message associated with a random access message, where the response message includes an identifier of the UE; select a format of an uplink channel or an uplink signal for confirming successful decoding of the response message; determine a transmission power of HARQ ACK information based at least in part on at least one of: a message type of the response message, a random access mode associated with the random access message, a power control configuration used by a previous transmission of the random access message, or the format of the uplink channel or the uplink signal; and transmit the HARQ ACK information using a power control process based at least in part on the transmission power and the identifier.

[0012] In some aspects, an apparatus for wireless communication may include: means for receiving a response message associated with a random access message, where the response message includes an identifier of the apparatus; means for selecting a format of an uplink channel or an uplink signal for confirming successful decoding of the response message; means for determining a transmission power of HARQ ACK information based at least in part on at least one of: a message type of the response message, a random access mode associated with the random access message, a power control configuration used by a previous transmission of the random access message, or the format of the uplink channel or the uplink signal; and means for transmitting the HARQ ACK information using a power control process based at least in part on the transmission power and the identifier.

[0013] In some aspects, a network node for wireless communication includes: one or more memories; and one or more processors coupled to the one or more memories, the one or more processors individually or jointly configured to: transmit a response message associated with a random access message, the response message including an identifier of a user equipment (UE); and receive hybrid automatic repeat request (HARQ) acknowledgement (ACK) information based at least in part on transmitting the response message, according to a power control process and a transmission power, where the transmission power is based at least in part on at least one of: a message type of the response message, a random access mode associated with the random access message, a power control configuration used by a previous transmission of the random access message, or a format of an uplink channel or an uplink signal for confirming successful decoding of the response message.

[0014] In some aspects, a method of wireless communication performed by a network node includes: transmitting a response message associated with a random access message, the response message including an identifier of a user equipment (UE); and receiving hybrid automatic repeat request (HARQ) acknowledgement (ACK) information based at least in part on transmitting the response message, according to a power control procedure and a transmission power, wherein the transmission power is based at least in part on at least one of: a message type of the response message, a random access mode associated with the random access message, a power control configuration used for a previous transmission of the random access message, or a format of an uplink channel or uplink signal for confirming successful decoding of the response message.

[0015] In some aspects, a non-transitory computer-readable medium stores an instruction set for wireless communication, the instruction set including: one or more instructions that, when executed by one or more processors of a network node, cause the network node to: transmit a response message associated with a random access message, the response message including an identifier of a user equipment (UE); and receive hybrid automatic repeat request (HARQ) acknowledgement (ACK) information based at least in part on transmitting the response message, according to a power control procedure and a transmission power, wherein the transmission power is based at least in part on at least one of: a message type of the response message, a random access mode associated with the random access message, a power control configuration used for a previous transmission of the random access message, or a format of an uplink channel or uplink signal for confirming successful decoding of the response message.

[0016] In some aspects, an apparatus for wireless communication includes: means for transmitting a response message associated with a random access message, the response message including an identifier of a user equipment (UE); and means for receiving hybrid automatic repeat request (HARQ) acknowledgement (ACK) information based at least in part on transmitting the response message, according to a power control procedure and a transmission power, wherein the transmission power is based at least in part on at least one of: a message type of the response message, a random access mode associated with the random access message, a power control configuration used for a previous transmission of the random access message, or a format of an uplink channel or uplink signal for confirming successful decoding of the response message.

[0017] Aspects generally include methods, apparatuses, systems, computer program products, non-transitory computer-readable media, user equipments, base stations, wireless communication devices, and / or processing systems substantially as described herein with reference to the figures and the description and shown in the figures.

[0018] The features and technical advantages of examples in accordance with the present disclosure were outlined rather broadly above so that the detailed description below can be better understood. Additional features and advantages will be described below. The disclosed concepts and specific examples can be readily used as a basis for modifying or designing other structures to achieve the same purposes of the present disclosure. Such equivalent configurations do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein, their organization and method of operation, and associated advantages will be better understood from the following description when considered in conjunction with the accompanying drawings. Each drawing is provided for purposes of illustration and description and not as a definition of the limits of the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To enable a more specific description of the above features of the present disclosure that was briefly summarized above, a more detailed description can be made by referring to the various aspects, some of which are illustrated in the accompanying drawings. It should be noted, however, that the appended drawings only illustrate certain typical aspects of the present disclosure and should not be considered as limiting its scope, as the description may allow other equivalent aspects. The same reference numerals in different drawings can identify the same or similar elements.

[0020] Figure 1 is a block diagram conceptually illustrating an example of a wireless communication network in accordance with various aspects of the present disclosure.

[0021] Figure 2 is a block diagram conceptually illustrating an example of a base station communicating with a UE in a wireless communication network in accordance with various aspects of the present disclosure.

[0022] Figure 3 is an illustration showing an example of hybrid automatic repeat request (HARQ) acknowledgement (ACK) transmission power determination for a two-step random access procedure in accordance with various aspects of the present disclosure.

[0023] Figure 4 is an illustration showing an example of HARQ ACK transmission power determination for a four-step random access procedure associated with a fallback from a two-step random access procedure in accordance with various aspects of the present disclosure.

[0024] Figure 5 is an illustration showing an example process, such as performed by a user equipment, in accordance with various aspects of the present disclosure. DETAILED DESCRIPTION

[0025] Aspects of the present disclosure will now be described more fully with reference to the accompanying drawings. However, the present disclosure may be embodied in many different forms and should not be construed as limited to any specific structure or function throughout the present disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art. Based on the teachings herein, those skilled in the art should appreciate that the scope of the present disclosure is intended to cover any aspect of the present disclosure disclosed herein, whether implemented independently of any other aspect of the present disclosure or in combination with any other aspect of the present disclosure. For example, any number of the aspects described herein may be used to implement a device or practice a method. Additionally, the scope of the present disclosure is intended to cover devices and methods practiced using other structures, functions, or combinations of structures and functions in addition to the various aspects of the present disclosure disclosed herein. It should be understood that any aspect of the present disclosure disclosed herein may be embodied by one or more elements of a claim.

[0026] Several aspects of a telecommunications system will now be introduced with reference to various devices and techniques. These devices and techniques will be described in the following detailed description and illustrated in the drawings by various blocks, modules, components, circuits, steps, processes, algorithms, and / or the like (collectively referred to as "elements"). These elements may be implemented using hardware, software, or any combination thereof. Whether these elements are implemented as hardware or software depends on the particular application and the design constraints imposed on the overall system.

[0027] It should be noted that although terms typically associated with 3G and / or 4G wireless technologies may be used herein to describe aspects, aspects of the present disclosure may be applied to other generation-based communication systems, such as 5G and later, including NR technologies.

[0028] Figure 1 is a schematic diagram of a wireless network 100 in which aspects of the present disclosure may be practiced. The wireless network 100 may be an LTE network or some other wireless network (such as a 5G or NR network). The wireless network 100 may include multiple BSs 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A BS is an entity that communicates with a user equipment (UE) and may also be referred to as a base station, NR BS, Node B, gNB, 5G Node B (NB), access point, transmit receive point (TRP), and / or the like. Each BS may provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to the coverage area of a BS and / or the BS subsystem serving that coverage area, depending on the context in which the term is used.

[0029] The BS can provide communication coverage for macro cells, pico cells, femto cells, and / or another type of cell. A macro cell can cover a relatively large geographical area (e.g., with a radius of several kilometers) and can allow unrestricted access by UEs with service subscriptions. A pico cell can cover a relatively small geographical area and can allow unrestricted access by UEs with service subscriptions. A femto cell can cover a relatively small geographical area (e.g., a home) and can allow restricted access by UEs associated with the femto cell (e.g., UEs in a Closed Subscriber Group (CSG)). The BS for a macro cell can be referred to as a macro BS. The BS for a pico cell can be referred to as a pico BS. The BS for a femto cell can be referred to as a femto BS or a home BS. In Figure 1 In the example shown, BS 110a can be the macro BS of macro cell 102a, BS 110b can be the pico BS of pico cell 102b, and BS 110c can be the femto BS of femto cell 102c. The BS can support one or more (e.g., three) cells. In this document, the terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "Node B", "5G NR", and "cell" can be used interchangeably.

[0030] In some aspects, a cell may not necessarily be fixed, and the geographical area of a cell can move according to the location of a mobile BS. In some aspects, the BSs can be interconnected with each other and / or interconnected to one or more other BSs or network nodes (not shown) in the wireless network 100 through various types of backhaul interfaces such as direct physical connections, virtual networks, and / or similar interfaces using any suitable transport network.

[0031] The wireless network 100 can also include relay stations. A relay station is an entity capable of receiving a data transmission from an upstream station (e.g., a BS or a UE) and transmitting that data transmission to a downstream station (e.g., a UE or a BS). A relay station can also be a UE capable of relaying the transmissions of other UEs. In Figure 1 In the example shown, relay station 110d can communicate with macro BS 110a and UE 120d to facilitate communication between BS 110a and UE 120d. A relay station can also be referred to as a relay BS, relay base station, repeater, and / or the like.

[0032] The wireless network 100 can be a heterogeneous network including different types of BSs (e.g., macro BSs, pico BSs, femto BSs, relay BSs, and / or the like). These different types of BSs can have different transmission power levels, different coverage areas, and different impacts on interference in the wireless network 100. For example, a macro BS can have a relatively high transmission power level (e.g., 5 to 40 watts), while pico BSs, femto BSs, and relay BSs can have relatively low transmission power levels (e.g., 0.1 to 2 watts).

[0033] The network controller 130 can be coupled to a set of BSs and can provide coordination and control for these BSs. The network controller 130 can communicate with the BSs via a backhaul. The BSs can also communicate with each other directly or indirectly, e.g., via a wireless or wired backhaul.

[0034] UEs 120 (e.g., 120a, 120b, 120c) can be dispersed throughout the wireless network 100, and each UE can be fixed or mobile. A UE can also be referred to as an access terminal, a terminal, a mobile station, a subscriber unit, a station, and / or the like. A UE can be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet computer, a camera, a gaming device, a netbook, a smartbook, a ultrabook, a medical device or equipment, a biometric sensor / device, a wearable device (smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), an entertainment device (e.g., a music or video device, or a satellite radio), a vehicle-mounted component or sensor, a smart meter / sensor, industrial manufacturing equipment, a global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium.

[0035] Some UEs can be considered machine-type communication (MTC) or evolved or enhanced machine-type communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, and / or the like, which can communicate with a base station, another device (e.g., a remote device), or some other entity. A wireless node can provide connectivity to or from a network (e.g., a wide area network such as the Internet or a cellular network), e.g., via a wired or wireless communication link. Some UEs can be considered Internet of Things (IoT) devices, and / or can be implemented as narrowband IoT (NB-IoT) devices. Some UEs can be considered customer premises equipment (CPE). The UE 120 can be included within an enclosure that houses components of the UE 120 (such as processor components, memory components, and / or the like).

[0036] Generally, any number of wireless networks can be deployed in a given geographical area. Each wireless network can support a specific RAT and can operate on one or more frequencies. The RAT can also be referred to as radio technology, air interface, and / or the like. The frequency can also be referred to as carrier, frequency channel, and / or the like. Each frequency can support a single RAT in a given geographical area to avoid interference between wireless networks of different RATs. In some cases, an NR or 5G RAT network can be deployed.

[0037] In some aspects, two or more UEs 120 (e.g., shown as UEs 120a and 120e) can communicate directly using one or more sidelink channels (e.g., without using the base station 110 as an intermediary for communicating with each other). For example, the UEs 120 can communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which can include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, and / or the like), mesh networks, and / or the like. In such cases, the UEs 120 can perform scheduling operations, resource selection operations, and / or other operations performed by the base station 110 described elsewhere herein.

[0038] As described above, provide Figure 1 as an example. Other examples can be different from those Figure 1 described.

[0039] Figure 2 A block diagram of a design 200 of a base station 110 and a UE 120 is shown. The base station 102 and the UE 104 can be Figure 1 one of the base stations and one of the UEs in. The base station 110 can be equipped with T antennas 234a to 234t, while the UE 120 can be equipped with R antennas 252a to 252r, where generally T≥1 and R≥1.

[0040] At base station 110, transmit processor 220 may receive data for one or more UEs from data source 212, select one or more modulation and coding schemes (MCSs) for each UE at least in part based on channel quality indicators (CQIs) received from the UEs, process (e.g., encode and modulate) the data for each UE at least in part based on the MCSs selected for the UEs, and provide data symbols for all UEs. Transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI) and / or the like) and control information (e.g., CQI requests, grants, upper layer signaling, and / or the like), and provide overhead symbols and control symbols. Transmit processor 220 may also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRSs)) and synchronization signals (e.g., primary synchronization signal (PSS) and secondary synchronization signal (SSS)). If applicable, transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, control symbols, overhead symbols, and / or reference symbols, and may provide T output symbol streams to T modulators (MODs) 232a through 232t. Each modulator 232 may process its respective output symbol stream (e.g., for OFDM and / or the like) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a through 232t may be transmitted via T antennas 234a through 234t, respectively. According to various aspects described in more detail below, position coding may be utilized to generate synchronization signals to convey additional information.

[0041] At the UE 120, antennas 252a through 252r may receive downlink signals from the base station 110 and / or other base stations, and may provide the received signals to demodulators (DEMOD) 254a through 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, down-convert, and digitize) the received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM and / or the like) to obtain received symbols. The MIMO detector 256 may obtain the received symbols from all R demodulators 254a through 254r, perform MIMO detection on the received symbols (if applicable), and provide the detected symbols. The receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide the decoded data of the UE 120 to the data sink 260, and provide the decoded control information and system information to the controller / processor 280. The channel processor may determine a reference signal received power (RSRP), a received signal strength indicator (RSSI), a reference signal received quality (RSRQ), a channel quality indicator (CQI), and / or the like. In some aspects, one or more components of the UE 120 may be included in a housing.

[0042] On the uplink, at the UE 120, the transmit processor 264 may receive and process data from the data source 262 and control information from the controller / processor 280 (e.g., for reporting including RSRP, RSSI, RSRQ, CQI, and / or the like). The transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by the TX MIMO processor 266 (if applicable), further processed by the modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, and / or the like), and transmitted to the base station 110. At the base station 110, the uplink signals from the UE 120 and other UEs may be received by the antennas 234, processed by the demodulator 232, detected by the MIMO detector 236 (if applicable), and further processed by the receive processor 238 to obtain the decoded data and control information sent by the UE 120. The receive processor 238 may provide the decoded data to the data sink 239 and provide the decoded control information to the controller / processor 240. The base station 110 may include a communication unit 244 and communicate with the network controller 130 via the communication unit 244. The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292.

[0043] The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2Any other component(s) may perform one or more techniques associated with controlling the power for HARQ ACK feedback signals in random access, as described in more detail elsewhere herein. For example, the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 any other component(s) may perform or direct, for example Figure 5 the operations of process 500 and / or other processes as described herein. The memories 242 and 282 may store data and program codes for the base station 110 and the UE 120, respectively. In some aspects, the memories 242 and / or the memory 282 may include non-transitory computer-readable media storing one or more instructions for wireless communication. For example, when run by one or more processors of the base station 110 and / or the UE 120, the one or more instructions may perform or direct the operations of, for example Figure 5 process 500 and / or other processes as described herein. The scheduler 246 may schedule the UE for data transmission on the downlink and / or uplink.

[0044] In some aspects, the UE 120 may include: components for receiving a response message associated with a random access message, where the response message includes an identifier of the UE; components for selecting a format of an uplink channel or an uplink signal for confirming successful decoding of the response message; components for determining a transmission power of hybrid automatic repeat request (HARQ) acknowledgement (ACK) information; components for transmitting the HARQ ACK information using a power control process based at least in part on the transmission power and the identifier; components for receiving a transmission power control command in at least one of: downlink control information (DCI) carried by a downlink control channel of the response message, or a successful random access response carried by a downlink shared channel of the response message; components for receiving signaling indicating a configuration of at least one of a power control mode or a power control parameter for determining the transmission power and / or the like. In some aspects, such components may include one or more components of the UE 120 described in conjunction with Figure 2 such as the controller / processor 280, the transmit processor 264, the TX MIMO processor 266, the MOD 254, the antenna 252, the demodulator (DEMOD) 254, the MIMO detector 256, the receive processor 258, etc.

[0045] As described above, provided Figure 2 as an example. Other examples may be different from those described with respect to Figure 2 described.

[0046] A UE can use a random access procedure to access a cell. For example, the random access procedure can include a two-step random access procedure, a four-step random access procedure, etc. In NR, the two-step random access procedure can be used for contention-based random access (CBRA) and contention-free random access (CFRA). For example, CBRA can be used in any RRC state (e.g., idle, inactive, or connected), while CFRA can be used in the RRC connected state.

[0047] In some cases, the UE can initiate a two-step random access procedure by sending a random access message such as a random access channel (RACH) message A. The two-step random access procedure can proceed differently depending on the base station's processing result of the random access message. For example, the base station can send a successful random access response (RAR), a fallback RAR, or a backoff indicator in the response message depending on the processing result of the preamble and / or payload of the random access message. For example, the base station can provide a successful RAR, a fallback RAR, or a backoff indicator in a response message such as RACH message B.

[0048] If the UE does not receive a successful RAR, the UE can retransmit the payload and / or preamble of the random access message (e.g., can retry the two-step random access procedure or revert to the four-step random access procedure). If the base station can decode the retransmitted preamble and / or payload, the base station can respond with a successful RAR or the fourth message of the four-step random access procedure. If the UE successfully decodes the successful RAR or the fourth message, the UE can send HARQ ACK information to complete the random access procedure.

[0049] The HARQ ACK information can be mapped to multiple different uplink physical channels or physical signals, which can be associated with different signaling overheads and reliabilities. In addition, the transmission of the HARQ ACK information may introduce inter-cell or intra-cell interference and may consume the UE battery power. Therefore, a single or inflexible method for determining the transmission power for the HARQ ACK information may increase interference and UE battery power consumption.

[0050] Some of the techniques and apparatuses described herein provide power control for HARQ ACK information associated with a random access procedure. For example, some of the techniques and apparatuses described herein provide a mapping of HARQ ACK information to one or more bits. Some of the techniques and apparatuses described herein provide open-loop power control or closed-loop power control for HARQ ACK information. For example, formulas for power control are provided herein that are at least partially based on the bandwidth, carrier, cell, and transmission occasion of the HARQ ACK information. Power control may also be at least partially based on the format of the uplink channel or uplink signal for the HARQ ACK information, the message type of the response message, the random access mode associated with the response message, the power control configuration for determining the transmission power, etc. In this way, inter-cell and intra-cell interference can be reduced, and UE power utilization can be improved.

[0051] Figure 3 FIG. is an illustration of example 300 for HARQ ACK transmission power determination for a two-step random access procedure in accordance with various aspects of the present disclosure. As shown, example 300 includes UE 120 and BS 110.

[0052] As indicated by reference numeral 310, BS 110 may provide a synchronization signal block and random access channel (RACH) configuration information to UE 120. The RACH configuration information may identify the configuration of the two-step RACH procedure. In some aspects, the RACH configuration information may identify power control parameters. For example, the power control parameters for CBRA may be different from those for CFRA. In some aspects, the RACH configuration information may include an indication of whether the response message is to use the physical uplink control channel (PUCCH), uplink control information (UCI) multiplexed with the physical uplink shared channel (PUSCH), uplink reference signals, etc. In some aspects, the RACH configuration information may indicate the format of the response message (e.g., long PUCCH format, short PUCCH format, and / or the like). In some aspects, the RACH configuration information may indicate the bandwidth part, uplink carrier, numerology, reference index for path loss measurement, and / or the like. In some aspects, the RACH configuration information may indicate the random access preamble index assigned to the UE during the CFRA procedure.

[0053] As shown by reference numeral 320, the UE 120 may send, and the base station 110 may receive, a random access message (e.g., RACH MsgA or Message A) of a two-step random access procedure. For example, the UE 120 may send the random access message according to the RACH configuration information received in connection with reference numeral 310. The random access message may include a preamble and a payload (e.g., PUSCH). The BS 110 may perform different actions based on whether the BS 110 successfully decodes one or more of the preamble and the payload. In some aspects, the UE 120 may use a specific power control configuration to send the preamble and / or the payload, which will be described in more detail elsewhere in this document.

[0054] As shown by reference numeral 330, in Example 300, the BS 110 successfully decodes the payload and the preamble. For an example when the BS 110 only detects the preamble but not the payload, refer to Figure 4 . If the BS 110 fails to decode the preamble, the BS 110 may not perform any action, and the UE 120 may re-send the message shown by reference numeral 320. In Example 300, the BS 110 may detect the preamble, identify the payload at least in part based on the preamble, and decode the payload. As shown by reference numeral 340, the BS 110 sends a response message associated with the random access message shown by reference numeral 320. Here, the response message includes a successful random access response (RAR) of a two-step random access procedure MsgB based at least in part on the BS 110 successfully decoding the preamble and the payload.

[0055] As further shown, the response message includes an identifier of the UE 120. For example, the identifier may be a unique identifier of the UE 120. In some aspects, the identifier may include an inactive state radio network temporary identifier (RNTI), an idle state RNTI, a cell-specific RNTI, a random access preamble index (RAPID) allocated to the UE during the CFRA procedure, and / or the like. The UE 120 may provide HARQ ACK information at least in part based on identifying the identifier in the response message, as described in more detail below.

[0056] As shown by reference numeral 350, the UE 120 may determine the transmission power for the HARQ ACK information. For example, the UE 120 may successfully decode the response message and may accordingly provide HARQ ACK information indicating that the response message has been successfully decoded, thereby completing the random access procedure. The techniques and apparatuses described herein provide for the determination of the transmission power and / or power control procedure for the transmission of HARQ ACK information, thereby improving UE power utilization and reducing inter-cell interference and intra-cell interference.

[0057] UE 120 may determine the transmission power at least partially based on a power control configuration. In some aspects, power control parameters associated with the power control configuration may be indicated in system information (SI) (e.g., for an inactive or idle UE), radio resource control (RRC) signaling (e.g., for a connected UE), and / or the like using a lookup table associated with two-step RACH. For example, UE 120 may receive signaling indicating at least one of a power control mode (e.g., open-loop power control, closed-loop power control, and / or the like) or a power control parameter (described in more detail below in conjunction with Equation 1). In such a case, an index of the lookup table may be indicated to UE 120 in system information such as a system information block.

[0058] In some aspects, UE 120 may perform a power control process, such as an open-loop power control process, a closed-loop power control process, or a combination of an open-loop power control process and a closed-loop power control process, to determine the transmission power for HARQ ACK information. In some aspects, UE 120 may use Equation 1 below to determine the HARQ ACK information ( :

[0059]

[0060] Equation 1

[0061] In Equation 1, b represents the bandwidth part, f represents the carrier, c represents the cell, and i represents the transmission occasion. The path loss compensation value is represented by α b,f,c The path loss value at the reference signal index q d is represented by The nominal UE transmission power is represented by P 0_HF,b,f,c The offset related to the MCS is represented by The maximum transmission power of UE 120 is represented by The dynamic offset is represented by g b,f,c (i, l). In some aspects, the dynamic offset may be defined by and Each of the above terms of Equation 1 will be described in more detail below.

[0062] The path loss compensation value (α b,f,cIt may include a full path loss compensation value (e.g., the path loss that fully offsets the HARQ ACK information) or a partial path loss value (e.g., the path loss that partially offsets the HARQ ACK information). In some aspects, the path loss compensation value may be at least partially based on the uplink channel or the uplink signal. For example, if the uplink channel is PUCCH, the path loss compensation value may be a full path loss compensation value. If the uplink channel is UCI carried on PUSCH, the path loss compensation value may be a full path loss compensation value or a partial path loss value. In this case, the path loss compensation value may be based on the power control configuration of the PUSCH on which the UCI is carried. If the uplink signal is an uplink reference signal, the path loss compensation value may be a full path loss compensation value or a partial path loss value.

[0063] In some aspects, the nominal UE transmit power may be at least partially based on the previous nominal UE transmit power of the random access message (e.g., the random access message indicated by reference numeral 310 or the transmission of the random access message before the random access message indicated by reference numeral 310). For example, the nominal UE transmit power may be at least partially based on the nominal UE transmit power of the preamble of the random access message or the payload of the random access message. In some aspects, the nominal UE transmit power may be at least partially based on the previous nominal UE transmit power and at least partially based on an offset (such as a UE-specific offset). In some aspects, signaling (such as system information or radio resource control (RRC) signaling) may be used to indicate the nominal UE transmit power. In some aspects, the nominal UE transmit power may be at least partially based on an indication value with an offset such as a UE-specific offset (e.g., using SI or RRC signaling).

[0064] The offset related to MCS ( ) may consider the MCS at least partially based on the transport format (TF) of the HARQ ACK information. In some aspects, the MCS-related offset may be set to a fixed value (such as zero). In some aspects, the MCS-related offset may follow the configuration rules of the physical channel or physical signal used to carry the HARQ ACK. For example, for HARQ ACK information provided using the carried UCI, the offset (e.g., semi-static offset) (e.g., using RRC signaling and / or the like) may be configured.

[0065] The dynamic offset (g b,f,c (i, l)) may be at least partially based on the sum of the power rise of the open-loop power control process and the transmit power control (TPC) accumulation of the closed-loop power control process. This can be expressed as and is represented. In some aspects, the magnitude of the power ramp-up can use the power control configuration of the preamble or payload of the random access message indicated by reference numeral 310. In some aspects, the magnitude of the power ramp-up can be configured using SI, RRC signaling, a look-up table, and / or the like.

[0066] In some aspects, the UE 120 can use a bandwidth-related offset (not shown in the above formula) to determine the transmission power. For example, in some aspects, the bandwidth-related offset can be at least partially based on a set of parameters of the uplink channel or uplink signal, the number of resource blocks (RBs) allocated for the uplink channel of the uplink signal, and / or the like. In some aspects, the bandwidth-related offset can be at least partially based on a scaling factor (e.g., a scaling factor applied to a value determined at least partially based on the set of parameters and the number of allocated RBs), and the scaling factor can be configured using SI, RRC, and / or the like.

[0067] As shown in the above formula, the UE 120 can use a path loss value determined according to a reference signal index and adjusted by a path loss compensation value ( ). In some aspects, the reference signal index can refer to the preamble or payload of the random access message indicated by reference numeral 310, or can be signaled to the UE 120 in a reference signal configuration (e.g., using SI, RRC signaling, and / or the like).

[0068] In some aspects, the UE 120 can pause the power ramp counter. For example, the UE 120 can pause the power ramp counter at least partially based on the power control configuration of the preamble or payload of the random access message indicated by reference numeral 310. As another example, the UE 120 can pause the power ramp counter when the UE 120 changes the transmission spatial counter used for transmitting HARQ ACK information, when the UE 120 changes the bandwidth part, when the UE 120 changes the uplink carrier, or at least partially based on receiving DCI indicating to pause the power ramp counter.

[0069] As shown by reference numeral 360, the UE 120 can use a power control process and transmit HARQ ACK information (indicated by reference numeral 370) at least partially based on the transmission power determined in conjunction with reference numeral 350. In some aspects, the power control process can be used to determine the transmission power. In some aspects, the transmission power can be used as part of the power control process.

[0070] In some aspects, the UE 120 can determine the transmission power and / or perform a power control process at least in part based on a TPC command. The TPC command can indicate that the UE 120 is to increase or decrease the transmission power. For example, the UE 120 can track the TPC commands from the BS 110 to determine the transmission power. In some aspects, for open-loop power control, the TPC command can be disabled. In some aspects, for closed-loop power control, the TPC command can be the carrier in the DCI of the physical downlink control channel (PDCCH) of the MsgB successful RAR indicated by reference numeral 340. In some aspects, the TPC command can be carried in the sub-protocol data unit (sub-PDU) of the physical downlink shared channel (PDSCH) of the MsgB successful RAR indicated by reference numeral 340. In some aspects, the TPC command can be a UE-specific TPC command. In some aspects, the TPC command can be multicast as a group common TPC command to a group of UEs including the UE 120.

[0071] As shown by reference numeral 370, the UE 120 can send HARQ ACK information. In some aspects, the HARQ ACK information can be mapped to a single bit. In some aspects, the HARQ ACK information can be mapped to multiple bits. For example, the multiple bits can include a repetition or coded sequence of the HARQ ACK information, or multiplexing of the HARQ ACK information with another uplink transmission (such as a scheduling request, a beam management report, a channel state report, and / or the like). In some aspects, the HARQ ACK information can be mapped to the PUCCH, such as the PUCCH associated with a short PUCCH format or a long PUCCH format. In some aspects, the UE 120 and / or the BS 110 can determine the format of the uplink channel based at least in part on at least one of the waveform of the random access message (such as CP-OFDM or DFT-s-OFDM), the latency requirement of the random access process associated with the random access message, or the multiplexing capacity requirement of the UE 120.

[0072] In some aspects, the HARQ ACK information is mapped to the UCI multiplexed with the PUSCH (such as by puncturing or rate matching the PUSCH). In some aspects, the HARQ ACK information can be mapped to an uplink reference signal, such as a sounding reference signal, a demodulation reference signal, a preamble, a sequence associated with a threshold peak-to-average power ratio, and / or the like. Using a signal with a threshold peak-to-average power ratio (such as a low peak-to-average power ratio) can improve the performance of the signal by reducing waveform degradation.

[0073] As described above, provide Figure 3 as an example. Other examples can be related to Figure 3Described differently.

[0074] Figure 4 FIG. 400 is an illustration showing an example 400 for determining the transmission power of a HARQ ACK for a four-step random access procedure associated with fallback from a two-step random access procedure. Example 400 includes UE 120 and BS 110. As Figure 4 shown, and by reference numeral 410, example 400 is an example where BS 110 only detects the preamble of RACH message A. In other words, in example 400, BS 110 fails to decode the payload of RACH message A.

[0075] As shown by reference numeral 420, BS 110 may send an indication that BS 110 fails to decode the payload of RACH message A. Here, the indication includes a fallback RAR, such as a sub-PDU indicating that UE 120 will fallback to a four-step random access procedure. Thus, as shown by reference numeral 430, UE 120 retransmits the payload of the random access message (e.g., PUSCH) using a message similar to message 3 of the four-step random access procedure. As shown by reference numeral 440, BS 110 successfully decodes the retransmission (ReTX) of the payload. Thus, as shown by reference numeral 450, BS 110 sends a response message (e.g., RACH message 4 of the four-step RACH procedure). As further shown, the response message includes the identifier of UE 120.

[0076] As shown by reference numerals 460 and 470, UE 120 may determine the transmission power for HARQ ACK information and may send the HARQ ACK information (shown by reference numeral 480). The determination of the transmission power and the power control process are described in more detail in connection with Figure 3 reference numerals 350 and 360. It should be understood that the reference to the determination based at least in part on the transmission power or power control process of the random access message shown by reference numeral 320 may also apply to the determination of the transmission power or power control process for the transmission of HARQ ACK information 480 based at least in part on Figure 4 MsgA in.

[0077] As described above, provide Figure 4 as an example. Other examples may be different from those described with respect to Figure 4 Described differently.

[0078] Figure 5 FIG. 500 is an illustration showing an example process 500 performed by a UE, for example, according to various aspects of the present disclosure. Example process 500 is an example where a UE (e.g., UE 120 and / or the like) performs operations associated with power control of HARQ feedback signals in random access.

[0079] As Figure 5 shown, in some aspects, processing 500 may include receiving a response message associated with a random access message, where the response message includes an identifier of the UE (block 510). For example, as described above, the UE (e.g., using the receiving processor 258, the transmitting processor 264, the controller / processor 280, the memory 282, and / or the like) may receive a response message associated with a random access message. In some aspects, the response message includes an identifier of the UE.

[0080] As Figure 5 further shown, in some aspects, processing 500 may include selecting a format of an uplink channel or an uplink signal to confirm successful decoding of the response message (block 520). For example, as described above, the UE (e.g., using the receiving processor 258, the transmitting processor 264, the controller / processor 280, the memory 282, and / or the like) may select a format of an uplink channel or an uplink signal for confirming successful decoding of the response message. The format may include, for example, a PUCCH format, an uplink reference signal format, UCI carried on a PUSCH format, and / or the like. In some aspects, processing 500 may not include selecting a format of an uplink channel or an uplink signal.

[0081] As Figure 5 further shown, in some aspects, processing 500 may include determining a transmission power for HARQ ACK information based at least in part on at least one of: a message type of the response message, a random access mode associated with the random access message, a power control configuration used by a previous transmission of the random access message, or a format of an uplink channel or an uplink signal (block 530). For example, as described above, a user equipment (UE) (e.g., using the receiving processor 258, the transmitting processor 264, the controller / processor 280, the memory 282, and / or the like) may determine a transmission power for hybrid automatic repeat request (HARQ) acknowledgement (ACK) information based at least in part on at least one of: a message type of the response message, a random access mode associated with the random access message (e.g., a two-step mode, a four-step fallback mode, and / or the like), a power control configuration used by a previous transmission of the random access message (e.g., random access message 320, a previous transmission of a random access message before random access message 320, and / or the like), or a format of an uplink channel or an uplink signal.

[0082] As Figure 5As further shown in [description], in some aspects, processing 500 may include transmitting HARQ ACK information (block 540) using a power control process based at least in part on the transmission power and at least in part on an identifier. For example, as described above, a user equipment (UE) (e.g., using the receive processor 258, transmit processor 264, controller / processor 280, memory 282, and / or the like) may transmit HARQ ACK information using a power control process based at least in part on the transmission power and the identifier.

[0083] Processing 500 may include additional aspects, such as any single aspect described below or any combination and / or combination of aspects and / or one or more other processes described elsewhere herein.

[0084] In a first aspect, the message type of the response message includes at least one of the following: a successful random access response of a two-step random access process, or a RACH message 4 of a four-step random access process.

[0085] In a second aspect, alone or in combination with the first aspect, the HARQ ACK information indicates that the response message has been successfully decoded and the identifier has been detected.

[0086] In a third aspect, alone or in combination with one or more of the first and second aspects, the identifier includes at least one of the following: an inactive or idle state radio network temporary identifier (RNTI), a cell-specific RNTI, or a random access preamble index (RAPID) assigned to the UE in a contention-free random access process.

[0087] In a fourth aspect, alone or in combination with one or more of the first to third aspects, the HARQ ACK information is mapped to a single bit.

[0088] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, the HARQ ACK information is mapped to multiple bits, and the multiple bits are associated with at least one of the following: a repetition or coding sequence of the HARQ ACK information, or multiplexing of the HARQ ACK information with another uplink transmission.

[0089] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the format of the uplink channel is determined based at least in part on at least one of the following: the waveform of the random access message, the waiting time requirement of the random access process associated with the random access message, or the multiplexing capacity requirement of the UE, and the uplink channel includes a physical uplink control channel.

[0090] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, HARQ ACK information is mapped to uplink control information (UCI), which is at least partially based on puncturing or rate matching of a physical uplink shared channel and multiplexed with the physical uplink shared channel.

[0091] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, HARQ ACK information is mapped to an uplink reference signal.

[0092] In a ninth aspect, alone or in combination with one or more of the first to eighth aspects, the power control process is an open-loop power control process, and the configuration associated with the open-loop power control process is at least partially based on a preamble or payload of a previous transmission of a random access message.

[0093] In a tenth aspect, alone or in combination with one or more of the first to ninth aspects, the power control process is a closed-loop power control process, and the configuration associated with the closed-loop power control process is at least partially based on a preamble or payload of a previous transmission of a random access message.

[0094] In an eleventh aspect, alone or in combination with one or more of the first to tenth aspects, processing 500 includes receiving a transmit power control command in at least one of: downlink control information (DCI) carried by a downlink control channel of a response message, or a successful random access response carried by a downlink shared channel of the response message.

[0095] In a twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, processing 500 includes receiving signaling indicating a configuration of at least one of a power control mode or power control parameter for determining transmit power.

[0096] In a thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, the signaling is carried by system information (SI) and radio resource control (RRC) signaling for a UE in a connected state.

[0097] In a fourteenth aspect, alone or in combination with one or more of the first to thirteenth aspects, the signaling is carried by radio resource control (RRC) signaling for a UE in a connected state.

[0098] In a fifteenth aspect, alone or in combination with one or more of the first to fourteenth aspects, determining transmit power is at least partially based on whether HARQ ACK information is mapped to a physical uplink control channel, uplink control information, or an uplink reference signal.

[0099] In a sixteenth aspect, either alone or in combination with one or more of the first to fifteenth aspects, the transmission power is determined at least in part based on at least one of the following: whether the power ramp counter of the UE is suspended, whether a transmit power control (TPC) command is received, or whether the maximum transmit power of the UE is reached.

[0100] In a seventeenth aspect, either alone or in combination with one or more of the first to sixteenth aspects, the power ramp counter of the UE is suspended based on at least one of the following: a change in the transmit spatial filter, a change in the bandwidth part, a change in the uplink carrier, or downlink control information received by the UE.

[0101] In an eighteenth aspect, either alone or in combination with one or more of the first to seventeenth aspects, the determination of the transmission power is at least in part based on the nominal transmit power of the UE, where the nominal transmit power is at least based on at least one of the following: the nominal transmit power of the preamble of a previous transmission of a random access message, the nominal transmit power of the payload of a previous transmission of a random access message, a UE-specific offset, or an offset of a network configuration indicated by system information or radio resource control signaling.

[0102] In a nineteenth aspect, either alone or in combination with one or more of the first to eighteenth aspects, the determination of the transmission power is at least in part based on an offset that is at least in part based on the modulation and coding scheme (MCS) of the UE and that is at least in part based on the format of the uplink channel or uplink signal carrying HARQ ACK information.

[0103] In a twentieth aspect, either alone or in combination with one or more of the first to nineteenth aspects, the determination of the transmission power is at least in part based on at least one of the power ramp-up process of the UE or the cumulative value associated with a transmit power control (TPC) command.

[0104] In a twenty-first aspect, either alone or in combination with one or more of the first to twentieth aspects, the TPC command includes a UE-specific TPC command.

[0105] In a twenty-second aspect, either alone or in combination with one or more of the first to twenty-first aspects, the TPC command is multicast as a group common TPC command to a group of UEs including the UE.

[0106] In a twenty-third aspect, either alone or in combination with one or more of the first to twenty-second aspects, the determination of the transmission power is at least in part based on the bandwidth of the uplink channel or uplink signal.

[0107] In a twenty-fourth aspect, alone or in combination with one or more of the first to twenty-third aspects, determining a transmit power is at least partially based on a reference signal index configured for path loss measurement, where the reference signal index is at least partially based on at least one of the following: a reference signal index of a preamble or payload of a previous transmission of a random access message, or a resource signal configuration of the UE.

[0108] In a twenty-fifth aspect, alone or in combination with one or more of the first to twenty-fourth aspects, the identifier is a unique identifier.

[0109] While Figure 5 example boxes of a process 500 are shown, in some aspects, the process 500 may include additional boxes, fewer boxes, different boxes, or boxes arranged in a different permutation than Figure 5 those shown. Additionally or alternatively, two or more boxes of the process 500 may be executed in parallel.

[0110] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure, or may be acquired from practice of these aspects.

[0111] As used herein, the term "component" is intended to be broadly interpreted as hardware, firmware, and / or a combination of hardware and software. As used herein, a processor is implemented in hardware, firmware, and / or a combination of hardware and software.

[0112] As used herein, depending on the context, meeting a threshold may mean greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, and / or the like.

[0113] It will be apparent that the systems and / or methods described herein may be implemented in different forms of hardware, firmware, and / or combinations of hardware and software. The actual specific control hardware or software code used to implement these systems and / or methods does not limit these aspects. Accordingly, the operations and behavior of the systems and / or methods are described herein without reference to specific software code—it being understood that software and hardware can be designed to implement the systems and / or methods at least in part based on the description herein.

[0114] Although specific combinations of features are recited in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of the various aspects. In fact, many of these features may be combined in ways not specifically recited in the claims and / or not disclosed in the specification. Although each dependent claim listed below may directly depend on only one claim, the disclosure of the various aspects includes each dependent claim in combination with every other claim in the claim set. A phrase referring to "at least one" in a list of items refers to any combination of those items, including a single member. As an example, "at least one of a, b, or c" is intended to cover a, b, c, a - b, a - c, b - c, and a - b - c, as well as any combination with multiples of the same element (e.g., a - a, a - a - a, a - a - b, a - a - c, a - b - b, a - c - c, b - b, b - b - b, b - b - c, c - c - c, or any other order of a, b, and c).

[0115] Unless expressly so described, no element, act, or instruction used herein is to be construed as critical or essential. Also, as used herein, the articles "a" and "an" are intended to include one or more items and may be used interchangeably with "one or more." Additionally, as used herein, the terms "set" and "group" are intended to include one or more items (e.g., related items, unrelated items, combinations of related and unrelated items, and / or the like) and may be used interchangeably with "one or more." If only one item is intended, the phrase "only one" or similar language is used. Also, as used herein, the terms "has," "have," "having," and / or the like are intended to be open - ended terms. Additionally, unless otherwise expressly stated, the phrase "based on" is intended to mean "at least partially based on."

Claims

1. A network node for wireless communication, comprising: one or more memories; and one or more processors, coupled to the one or more memories, the one or more processors being individually or jointly configured to: transmit a response message associated with a random access message, the response message including an identifier of a user equipment (UE); and receive hybrid automatic repeat request (HARQ) acknowledgement (ACK) information, at least in part based on transmitting the response message, according to a power control procedure and a transmission power, wherein the transmission power is at least in part based on at least one of the following: a message type of the response message, a random access mode associated with the random access message, a power control configuration used for a previous transmission of the random access message, or a format of an uplink channel or an uplink signal for confirming successful decoding of the response message.

2. The network node according to claim 1, wherein, the message type of the response message includes at least one of the following: a successful random access response of a two-step random access procedure, or a RACH message 4 of a four-step random access procedure.

3. The network node according to claim 1, wherein, the HARQ ACK information indicates that the response message has been successfully decoded and the identifier has been detected.

4. The network node according to claim 1, wherein, the identifier includes at least one of the following: an inactive or idle state radio network temporary identifier (RNTI), a cell-specific RNTI, or a random access preamble index (RAPID) allocated for the UE in a contention-free random access procedure.

5. The network node according to claim 1, wherein, the HARQ ACK information is mapped to a single bit.

6. The network node according to claim 1, wherein, the HARQ ACK information is mapped to multiple bits, and wherein the multiple bits are associated with at least one of the following: a repetition or coding sequence of the HARQ ACK information, or a multiplexing of the HARQ ACK information with another uplink transmission.

7. The network node according to claim 1, wherein, the format of the uplink channel is at least in part based on at least one of the following: a waveform of the random access message, a latency requirement of a random access procedure associated with the random access message, or a multiplexing capacity requirement of the UE, and wherein the uplink channel includes a physical uplink control channel.

8. The network node according to claim 1, wherein, the HARQ ACK information is mapped to uplink control information (UCI), the UCI being multiplexed with a physical uplink shared channel at least in part based on puncturing or rate matching of the physical uplink shared channel.

9. The network node according to claim 1, wherein, the HARQ ACK information is mapped to an uplink reference signal.

10. The network node according to claim 1, wherein, The power control process is an open-loop power control process, where the configuration associated with the open-loop power control process is at least partially based on the preamble or payload of a previous transmission of the random access message, and where, for the open-loop power control process, the transmission of transmit power control (TPC) commands is prohibited.

11. The network node according to claim 1, wherein, the power control process is a closed-loop power control process, and where the configuration associated with the closed-loop power control process is at least partially based on the preamble or payload of a previous transmission of the random access message.

12. The network node according to claim 11, further comprising: transmitting a transmit power control command in at least one of: downlink control information (DCI) carried by a downlink control channel of the response message, or a successful random access response carried by a downlink shared channel of the response message.

13. The network node according to claim 1, further comprising: transmitting signaling indicating a configuration of at least one of a power control mode or power control parameter for determining the transmit power.

14. The network node according to claim 13, wherein, when the UE is in the connected state, the signaling is sent by system information (SI) and radio resource control (RRC) signaling.

15. The network node according to claim 13, wherein, when the UE is in the connected state, the signaling is carried by radio resource control (RRC) signaling.

16. The network node according to claim 1, wherein, the transmit power is further at least partially based on whether the HARQ ACK information is mapped to a physical uplink control channel, uplink control information, or uplink reference signal.

17. The network node according to claim 1, wherein, the transmit power is further at least partially based on at least one of the following: whether the power ramp counter of the UE is paused, whether a transmit power control (TPC) command is received, or whether the maximum transmit power of the UE is reached.

18. The network node according to claim 17, wherein, the power ramp counter of the UE is paused based on at least one of the following: a change in the transmit spatial filter, a change in the bandwidth part, a change in the uplink carrier, or the downlink control information received by the UE.

19. The network node according to claim 1, wherein, the transmit power is further at least partially based on the nominal transmit power of the UE, where the nominal transmit power is at least based on at least one of the following: the nominal transmit power of the preamble of the previous transmission of the random access message, the nominal transmit power of the payload of the previous transmission of the random access message, a UE-specific offset, or an offset of a network configuration indicated by system information or radio resource control signaling.

20. The network node according to claim 1, wherein, The transmission power is further at least partially based on an offset, which is at least partially based on the modulation and coding scheme (MCS) of the UE, wherein the offset is at least partially based on the format of the uplink channel or the uplink signal carrying the HARQ ACK information.

21. The network node according to claim 1, wherein, the transmission power is further at least partially based on at least one of a power ramp-up process of the UE or an accumulated value associated with a transmit power control (TPC) command.

22. The network node according to claim 21, wherein, the TPC command includes a UE-specific TPC command.

23. The network node according to claim 21, wherein, the TPC command is multicast as a group common TPC command to a group of UEs including the UE.

24. The network node according to claim 1, wherein, the transmission power is further at least partially based on the bandwidth of the uplink channel or the uplink signal.

25. The network node according to claim 1, wherein, the transmission power is further at least partially based on a reference signal index configured for path loss measurement, where the reference signal index is at least partially based on at least one of the following: the reference signal index of the preamble or payload of the previously transmitted random access message, or the reference signal configuration of the UE.

26. The network node according to claim 1, wherein, the identifier is a unique identifier.

27. A method for wireless communication performed by a network node, comprising: sending a response message associated with a random access message, the response message including an identifier of a user equipment (UE); and receiving hybrid automatic repeat request (HARQ) acknowledgement (ACK) information according to a power control process and a transmission power, at least partially based on sending the response message, wherein the transmission power is at least partially based on at least one of the following: the message type of the response message, the random access mode associated with the random access message, the power control configuration used for the previous transmission of the random access message, or the format of the uplink channel or uplink signal for acknowledging successful decoding of the response message.

28. The method according to claim 27, wherein, the message type of the response message includes at least one of the following: a successful random access response in a two-step random access process, or a RACH message 4 in a four-step random access process.

29. A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set comprising: one or more instructions that, when executed by one or more processors of a network node, cause the network node to: send a response message associated with a random access message, the response message including an identifier of a user equipment (UE); and receive hybrid automatic repeat request (HARQ) acknowledgement (ACK) information according to a power control process and a transmission power, at least partially based on sending the response message, wherein the transmission power is at least partially based on at least one of the following: The message type of the response message, The random access mode associated with the random access message, The power control configuration used for the previous transmission of the random access message, or The format of an uplink channel or uplink signal for confirming successful decoding of the response message.

30. An apparatus for wireless communication, comprising: means for sending a response message associated with a random access message, the response message including an identifier of a user equipment (UE); and means for receiving hybrid automatic repeat request (HARQ) acknowledgement (ACK) information based at least in part on sending the response message, according to a power control procedure and a transmission power, wherein the transmission power is at least partially based on at least one of the following: The message type of the response message, The random access mode associated with the random access message, The power control configuration used for the previous transmission of the random access message, or The format of an uplink channel or uplink signal for confirming successful decoding of the response message.

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