Techniques for retransmitting random access messages in wireless communications

Abstract

The variants described herein relate to: determining a failure associated with the initial transmission of a random access message sent by the UE in a two-step random access procedure received by the base station, and configuring retransmission parameters and / or at least a portion of the retransmission of the random access message based on the determination of the failure associated with receiving the random access message.

Description

Techniques for Retransmitting Random Access Messages in Wireless Communications This patent application claims the benefit of priority of Provisional Application No. 62 / 811,352, filed on Feb. 27, 2019, and U.S. Patent Application No. 16 / 783,985, filed on Feb. 6, 2020, both entitled "TECHNIQUES FOR RETRANSMITTING RANDOM ACCESS MESSAGES IN WIRELESS COMMUNICATIONS", the entire contents of which are hereby incorporated by reference in their entirety. Broadly, aspects of the present disclosure relate to wireless communication systems, and more particularly, to random access procedures. Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcasting, and the like. These systems may be multiple access systems capable of supporting communication with multiple users by sharing available system resources such as time, frequency, and power. Examples of such multiple access systems 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, and Single-Carrier Frequency Division Multiple Access (SC-FDMA) systems. These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at the city, national, regional, or even global levels. For example, the fifth generation (5G) wireless communication technology (which may be referred to as 5G New Radio (5G NR)) is expected to expand and support diverse use cases and applications for the current mobile network generation. In one aspect, 5G communication technology may include: enhanced mobile broadband that addresses human-centric use cases for accessing multimedia content, services, and data; ultra-reliable low latency communication (URLLC) with certain specifications for latency and reliability; and massive machine type communication, which may allow a huge number of connected devices and the transmission of relatively small amounts of non-latency-sensitive information. In some wireless communication technologies, a user equipment (UE) can use a random access procedure to establish a connection with a base station. Generally, the random access procedure can include four-step messages transmitted between the UE and the base station to establish the connection. Recent proposals have introduced a two-step random access procedure, in which the UE transmits a first message including a random access preamble signal and a payload in a shared random access opportunity, and the base station receiving the first message can transmit a second message including a random access response (e.g., for the random access preamble signal) and contention resolution information. The first message can include two separate transmissions (e.g., in time) of a preamble signal and a payload portion of the message, and the gap between the preamble signal transmission and the payload transmission is configurable. A brief summary of one or more aspects is provided below to provide a basic understanding of such aspects. This summary is not an exhaustive overview of all contemplated aspects, and is not intended to identify key or critical elements of all aspects, or to describe the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simple form as a prelude to the more detailed embodiments provided later. According to one aspect, a method for wireless communication is provided. The method includes: determining, by a user equipment (UE), a failure associated with an initial transmission of a random access message transmitted by the UE in a two-step random access procedure; and transmitting, by the UE to the base station and based on determining the failure, a retransmission of at least a portion of the random access message. In another aspect, a method for wireless communication is provided. The method includes: receiving, from a UE, a random access message transmitted by the UE in a two-step random access procedure; determining whether the random access message is an initial transmission or a retransmission of the random access message; and decoding the random access message based on determining whether the random access message is the initial transmission or the retransmission. In another aspect, a device for wireless communication is provided. The device includes a transceiver, a memory configured to store instructions, and one or more processors communicatively coupled to the transceiver and the memory. The one or more processors are configured to: determine a failure associated with an initial transmission of a random access message transmitted in a two-step random access procedure by a base station; and transmit, to the base station and based on determining the failure, a retransmission of at least a portion of the random access message. In another aspect, a device for wireless communication is provided. The device includes a transceiver, a memory configured to store instructions, and one or more processors communicatively coupled to the transceiver and the memory. The one or more processors are configured to: receive, from a UE, a random access message sent by the UE in a two-step random access procedure; determine whether the random access message is an initial transmission or a retransmission of the random access message; and decode the random access message based on determining whether the random access message is the initial transmission or the retransmission. In another aspect, a device for wireless communication is provided. The device includes: means for determining a failure associated with an initial transmission of a random access message received by a base station for a random access message sent in a two-step random access procedure; and means for transmitting, to the base station and based on determining the failure, a retransmission of at least a portion of the random access message. In another aspect, a device for wireless communication is provided. The device includes: means for receiving, from a UE, a random access message sent by the UE in a two-step random access procedure; means for determining whether the random access message is an initial transmission or a retransmission of the random access message; and means for decoding the random access message based on determining whether the random access message is the initial transmission or the retransmission. In another aspect, a computer-readable medium is provided that includes code executable by one or more processors for wireless communication. The code includes: code for a UE to determine a failure associated with an initial transmission of a random access message received by a base station for a random access message sent by the UE in a two-step random access procedure; and code for the UE to transmit, to the base station and based on determining the failure, a retransmission of at least a portion of the random access message. In another aspect, a computer-readable medium is provided that includes code executable by one or more processors for wireless communication. The code includes: code for receiving, from a UE, a random access message sent by the UE in a two-step random access procedure; code for determining whether the random access message is an initial transmission or a retransmission of the random access message; and code for decoding the random access message based on determining whether the random access message is the initial transmission or the retransmission. To achieve the foregoing and related purposes, one or more aspects include the features that are fully described below and particularly pointed out in the claims. The following description and the drawings detail certain illustrative features of one or more aspects. However, in some of the various methods in which the principles of the aspects can be employed, these features are merely illustrative, and the description is intended to include all such aspects and their equivalents. Reference is now made to the accompanying drawings to describe various aspects. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more aspects. It will be evident, however, that such aspects may be practiced without these specific details. The features described generally relate to retransmitting messages in a two-step random access procedure, but the concepts can be applied to random access procedures with more or fewer than two steps. In a two-step random access procedure, a base station may broadcast a signal having parameters for establishing a connection with the base station. Such a signal may include a synchronization signal block (SSB), a system information block (SIB), a reference signal (RS), and so on. A user equipment (UE) may receive the broadcast signal, and may synchronize with the downlink from the base station, perform system information decoding and measurements, and so on. Additionally, the UE may determine one or more random access occasions for transmitting a random access message to establish a connection with the base station based on the parameters in the broadcast signal. When the UE desires to establish a connection with the base station, the UE may send a first message of the two-step random access procedure, which may include a preamble signal portion and a payload portion (e.g., where the payload portion may include physical uplink shared channel (PUSCH) data), and these portions may be transmitted separated by a transmission gap in time. The base station may receive the first message (e.g., as the preamble signal and the payload portion), and may send a response message to the UE, where the response message may include a random access response and / or contention resolution information. As described, for example, there may be a transmission gap defined and used by the UE between the preamble signal portion and the payload portion of the first message. For example, the transmission gap may allow for timing adjustment (TA) for the first message transmission, where the TA may be unknown or expired. Additionally, for example, the transmission gap may allow for different parameter sets, bandwidths, beam selection, power control schemes, sampling rates for the preamble signal and the payload, compatibility with a listen-before-talk (LBT) scheme (e.g., on a new radio (NR)-U interface), and so on, between the preamble signal portion and the payload portion. Additionally, for example, the transmission of the preamble signal portion of the first message may include a guard time between transmissions (e.g., as defined for any time division duplex (TDD) transmission of signals in a radio communication technology such as NR). In this example, given the increased guard time (compared to no guard time), the transmission gap may be reduced. In one example, subject to the conversion period between the end of the "ON power of the physical random access channel (PRACH)" and the start of the "ON power of the PUSCH" being not less than the length of the time mask, the transmission gap may also be reduced. Additionally or alternatively, the timing adjustment applied to the payload may shorten the effective transmission gap. Additionally, a transmit power time mask can be defined and used by the UE during transmission, where the mask can define one or more transition time periods allowed between transmit OFF power symbols and transmit ON power symbols (e.g., transmit ON / OFF as defined in 3GPP Technical Specification (TS) 38.101), and / or transition time periods allowed between consecutive ON power transmissions with application of power changes or resource block (RB) hopping, etc. In the case of applying RB hopping, for example, the transition time periods associated with each group of RBs can be symmetrically shared. In any case, the transmission and / or retransmission of random access messages (e.g., and / or the transmission / retransmission of the preamble signal and payload part of the first message) may be subject to transmission gaps and / or the transmit power time mask. Aspects described herein relate to facilitating the retransmission of random access messages in a random access procedure (e.g., a two-step random access procedure). For example, the retransmission of the first message (also referred to as "msgA") can be supported in a two-step random access procedure (e.g., a random access channel (RACH) procedure). For example, the retransmission of the preamble signal and / or payload of the first message can make full use of time / frequency / space diversity to improve performance. In another example, to facilitate coherent / non-coherent combining performed by a base station (e.g., a gNB), the UE can repeat the initial transmission of the first message, and / or can indicate whether the first message is new data or a retransmission by using one or more parameters in one or more signals transmitted by the UE. Additionally, the retransmission of at least a portion of the first message can be triggered by one or more events, beam management can be used to distinguish retransmissions, etc. In this regard, the UE can receive feedback from the base station for the first RACH message, or otherwise detect that the base station has not received at least a portion of the first RACH message (or has not sent feedback for it), and accordingly the UE can retransmit the first RACH message or a portion thereof to the base station to allow the base station to correctly receive and decode the first message. The described features will be provided in more detail below with reference to FIGS. 1-8. As used in this case, the terms "element", "module", "system", etc. are intended to include computer-related entities, such as but not limited to: hardware, firmware, combinations of hardware and software, software, or software in execution. For example, an element can be, but is not limited to, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and / or a computer. By way of example, both an application running on a computing device and the computing device can be elements. One or more elements can exist in a process and / or a thread of execution, and an element can be located in one computer and / or distributed between two or more computers. In addition, such elements can execute according to various computer-readable media storing various data structures. An element can communicate in a local and / or remote process manner via, for example, signals having one or more data packets, such as data from one element that interacts with another element in a local system, a distributed system, and / or crosses a network, such as the Internet, to interact with other systems in a signal manner. The techniques described herein can be used in various wireless communication systems such as CDMA, TDMA, FDMA, OFDMA, SC-FDMA, and other systems. The terms "system" and "network" are often used interchangeably. CDMA systems can implement radio technologies such as CDMA 2000, Universal Terrestrial Radio Access (UTRA), etc. CDMA2000 covers IS-2000, IS-95, and IS-856 standards. Release 0 and Release A of IS-2000 are commonly referred to as CDMA 2000 1X, 1X, etc. IS-856 (TIA-856) is commonly referred to as CDMA2000 1xEV-DO, High Rate Packet Data (HRPD), etc. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. TDMA systems can implement radio technologies such as Global System for Mobile Communications (GSM). OFDMA systems can implement radio technologies such as Ultra Mobile Broadband (UMB), Evolved UTRA (E-UTRA), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM TMWireless technologies such as etc. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). 3GPP Long-Term Evolution (LTE) and enhanced LTE (LTE-A) are new versions of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization named "3rd Generation Partnership Project" (3GPP). CDMA2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). The technologies described herein can be used in the systems and wireless technologies mentioned above, as well as in other systems and wireless technologies (including cellular (e.g., LTE) communication on shared radio spectrum bands). However, the following description describes the LTE / LTE-A system for purposes of example, and uses LTE terminology in most of the following description, but such technologies are applicable beyond LTE / LTE-A applications (e.g., applicable to Fifth Generation (5G) New Radio (NR) networks or other next-generation communication systems). The following description provides some examples and is not a limitation of the scope of protection, applicability, or examples set forth in the claims. The functions and arrangements of the elements discussed can be changed without departing from the scope of protection of the subject matter of this case. Each example can omit, substitute, or add various procedures or elements as needed. For example, the methods described can be performed in a different order than described, and individual steps can be added, omitted, or combined. Additionally, features described with respect to certain examples can be combined into other examples. Various aspects or features will be provided in the context of a system that can include multiple devices, elements, modules, etc. It is to be understood and recognized that various systems can include additional devices, elements, modules, etc., and / or may not include all of the devices, elements, modules, etc. discussed in conjunction with the figures. Combinations of such methods can also be used. FIG. 1 is a schematic diagram illustrating an example of a wireless communication system and an access network 100. The wireless communication system (also referred to as a wireless wide area network (WWAN)) may include a base station 102, a UE 104, an evolved packet core (EPC) 160, and / or a 5G core (5GC) 190. The base station 102 may include macro cells (high-power cellular base stations) and / or small cells (low-power cellular base stations). Macro cells may include base stations. Small cells may include femto cells, pico cells, and micro cells. In one example, the base station 102 may also include a gNB 180, as further described herein. In one example, some nodes of the wireless communication system may have a modem 240 and a communication component 242 for sending and / or retransmitting random access messages in a random access procedure. Additionally, some nodes may have a modem 340 and a scheduling component 342 for scheduling or otherwise enabling the use of resources for sending and / or retransmitting random access messages, as described herein. Although the UE 104 is illustrated as having a modem 240 and a communication component 242, and the base station 102 / gNB 180 is illustrated as having a modem 340 and a scheduling component 342, this is an illustrative example, and generally any node or any type of node may include a modem 240 and a communication component 242 and / or a modem 340 and a scheduling component 342 for providing the corresponding functions described herein. The base station 102 configured for 4G LTE (which may be collectively referred to as an evolved universal mobile telecommunications system (UMTS) terrestrial radio access network (E-UTRAN)) may be connected to the EPC 160 via a backhaul link 132 (e.g., using the S1 interface). The base station 102 configured for 5G NR (which may be collectively referred to as a next-generation RAN (NG-RAN)) may be connected to the 5GC 190 via a backhaul link 184. In addition to other functions, the base station 102 may perform one or more of the following functions: transmission of user data, radio channel encryption and decryption, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection establishment and release, load balancing, distribution of non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), user and device tracking, RAN information management (RIM), paging, positioning, and transmission of warning messages. The base stations 102 may communicate with each other directly or indirectly (e.g., via the EPC 160 or 5GC 190) on a backhaul link 134 (e.g., using the X2 interface). The backhaul link 134 may be wired or wireless. Base station 102 can communicate wirelessly with one or more UEs 104. Each base station of base station 102 can provide communication coverage for the corresponding geographical coverage area 110. There can be overlapping geographical coverage areas 110. For example, small cell 102’ can have a coverage area 110’ that overlaps with the coverage area 110 of one or more macro base stations 102. A network including both small cells and macro cells can be referred to as a heterogeneous network. The heterogeneous network can also include a Home evolved Node B (eNB) (HeNB), which can provide services to a restricted group called a Closed Subscriber Group (CSG). The communication link 120 between base station 102 and UE 104 can include an uplink (UL) (also referred to as a reverse link) transmission from UE 104 to base station 102 and / or a downlink (DL) (also referred to as a forward link) transmission from base station 102 to UE 104. The communication link 120 can use multiple-input multiple-output (MIMO) antenna technologies including spatial multiplexing, beamforming, and / or transmit diversity. The communication link can be via one or more carriers. Base station 102 / UE 104 can use a spectrum with a bandwidth of up to Y MHz per carrier (e.g., 5, 10, 15, 20, 100, 400, etc. MHz) allocated in carrier aggregation of up to Yx MHz (e.g., for x component carriers) for transmission in the DL and / or UL directions. The carriers can be or can not be adjacent to each other. The allocation of carriers can be asymmetric with respect to DL and UL (e.g., more or fewer carriers can be allocated for DL compared to UL). The component carriers can include a primary component carrier and one or more secondary component carriers. The primary component carrier can be referred to as a Primary Cell (PCell), and the secondary component carriers can be referred to as Secondary Cells (SCells). In another example, some UEs 104 can communicate with each other using a device-to-device (D2D) communication link 158. The D2D communication link 158 can use DL / UL WWAN spectrum. The D2D communication link 158 can use one or more sidelink channels, such as a Physical Sidelink Broadcast Channel (PSBCH), a Physical Sidelink Discovery Channel (PSDCH), a Physical Sidelink Shared Channel (PSSCH), and a Physical Sidelink Control Channel (PSCCH). D2D communication can be via various wireless D2D communication systems, such as, for example, FlashLinQ, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the IEEE 802.11 standard, LTE, or NR. The wireless communication system may also include a Wi-Fi access point (AP) 150 that communicates with a Wi-Fi station (STA) 152 via a communication link 154 in the 5 GHz unlicensed spectrum. When communicating in the unlicensed spectrum, the STA 152 / AP 150 may perform a Clear Channel Assessment (CCA) before communicating to determine whether the channel is available. The small cell 102’ can operate in licensed and / or unlicensed spectrum. When operating in the unlicensed spectrum, the small cell 102’ can employ NR and use the same 5 GHz unlicensed spectrum as used by the Wi-Fi AP 150. The small cell 102’ that employs NR in the unlicensed spectrum can enhance the coverage of the access network and / or increase the capacity of the access network. The base station 102 (whether a small cell 102’ or a large cell (e.g., a macro base station)) can include an eNB, a gNodeB (gNB), or other types of base stations. Some base stations, such as the gNB 180, can operate in the traditional sub-6 GHz spectrum that communicates with the UE 104, at millimeter wave (mmW) frequencies, and / or near mmW frequencies. When the gNB 180 operates at mmW or near mmW frequencies, the gNB 180 can be referred to as a mmW base station. Extremely High Frequency (EHF) is a part of the RF in the electromagnetic spectrum. EHF has a frequency range of 30 GHz to 300 GHz and a wavelength range of 1 millimeter to 10 millimeters. The radio waves in this band can be referred to as millimeter waves. Near mmW can extend down to a frequency of 3 GHz with a wavelength of 100 millimeters. The Super High Frequency (SHF) band extends between 3 GHz and 30 GHz, also known as centimeter waves. Communication using mmW / near mmW radio frequencies has extremely high path loss and short distances. The mmW base station 180 can utilize beamforming 182 with the UE 104 to compensate for the extremely high path loss and short distances. The base station 102 represented herein can include the gNB 180. The EPC 160 may include a Mobility Management Entity (MME) 162, other MMEs 164, a Serving Gateway 166, a Multimedia Broadcast Multicast Service (MBMS) Gateway 168, a Broadcast Multicast Service Center (BM-SC) 170, and a Packet Data Network (PDN) Gateway 172. The MME 162 may communicate with a Home Subscriber Server (HSS) 174. The MME 162 is a control node that processes signaling between the UE 104 and the EPC 160. Generally, the MME 162 provides bearer and connection management. All User Internet Protocol (IP) packets are transmitted via the Serving Gateway 166, which itself is connected to the PDN Gateway 172. The PDN Gateway 172 provides UE IP address allocation and other functions. The PDN Gateway 172 and the BM-SC 170 are connected to IP services 176. The IP services 176 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS), a PS streaming service, and / or other IP services. The BM-SC 170 may provide functions for MBMS user service provisioning and delivery. The BM-SC 170 may serve as an entry point for MBMS transmissions for content providers, and may be used to authorize and initiate MBMS bearer services within a Public Land Mobile Network (PLMN), and may be used to schedule MBMS transmissions. The MBMS Gateway 168 may be used to distribute MBMS traffic to base stations 102 belonging to a Multicast Broadcast Single Frequency Network (MBSFN) area that broadcasts a particular service, and may be responsible for session management (start / stop) and collecting charging information related to eMBMS. The 5GC 190 may include an Access and Mobility Management Function (AMF) 192, other AMFs 193, a Session Management Function (SMF) 194, and a User Plane Function (UPF) 195. The AMF 192 may communicate with a Unified Data Management (UDM) 196. The AMF 192 may be a control node that processes signaling between the UE 104 and the 5GC 190. Generally, the AMF 192 may provide QoS flow and session management. User Internet Protocol (IP) packets (e.g., packets from one or more UEs 104) may be transmitted via the UPF 195. The UPF 195 may provide UE IP address allocation for one or more UEs, and other functions. The UPF 195 is connected to IP services 197. The IP services 197 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS), a PS streaming service, and / or other IP services. A base station may also be referred to as a gNB, Node B, evolved Node B (eNB), access point, base transceiver station, radio base station, radio transceiver, transceiver function, basic service set (BSS), extended service set (ESS), transmit receive point (TRP), or some other appropriate term. Base station 102 provides an access point for UE 104 to EPC 160 or 5GC 190. Examples of UE 104 include cellular phones, smart phones, Session Initiation Protocol (SIP) phones, laptop computers, personal digital assistants (PDAs), satellite radio units, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, tablet computers, smart devices, wearable devices, vehicles, electric meters, air pumps, large or small kitchen appliances, healthcare devices, implants, sensors / actuators, displays, or any other similar functional device. Some of the UEs in UE 104 may be referred to as IoT devices (e.g., parking meters, air pumps, toasters, vehicles, heart monitors, etc.). IoT UEs may include machine type communication (MTC) / enhanced MTC (eMTC, also referred to as Category (CAT)-M, Cat M1) UEs, NB-IoT (also referred to as CAT NB1) UEs, and other types of UEs. In the context of this case, eMTC and NB-IoT may refer to future technologies that can evolve from or be based on these technologies. For example, eMTC may include FeMTC (further eMTC), eFeMTC (further enhanced eMTC), mMTC (massive MTC), etc., and NB-IoT may include eNB-IoT (enhanced NB-IoT), FeNB-IoT (further enhanced NB-IoT), etc. UE 104 may also be referred to as a station, mobile station, user station, mobile unit, user unit, radio unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile user station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile service client, client, or some other appropriate term. In one example, the scheduling component 342 can broadcast information related to sending random access messages, and the communication component 242 can process the broadcast information and accordingly send random access messages during a random access opportunity. Additionally, the communication component 242 can detect a trigger for retransmitting a random access message or at least a portion thereof. For example, the communication component 242 can receive a response message from the scheduling component 342, the response message including feedback for an initial random access message, parameters for retransmitting the random access message, etc., and / or can detect that no response message has been received from the scheduling component 342 for a period of time. The communication component 242 can accordingly retransmit at least a portion of the random access message, as further described herein. Turning now to FIGS. 2-8, some aspects are described with reference to one or more components and one or more methods that can perform the actions or operations described herein, where aspects in dashed lines can be optional. Although the operations described in FIGS. 4-5 below are provided in a particular order and / or are performed by example components, it should be understood that the ordering of the actions and the components performing the actions can be varied according to embodiments. Additionally, it should be understood that the actions, functions, and / or components described below can be performed by a processor specifically programmed, a processor executing specifically programmed software or computer-readable media, or any other combination of hardware components and / or software components capable of performing the described actions or functions. Referring to FIG. 2, an example implementation of the UE 104 can include a variety of components, some of which have been described above and will be further described herein, including components such as one or more processors 212, a memory 216, and a transceiver 202 that communicate via one or more buses 244, which can operate in conjunction with a modem 240 and / or a communication component 242 for sending and / or retransmitting random access messages. In one aspect, the one or more processors 212 may include a modem 240 that uses one or more data processors, and / or may be part of the modem 240. Accordingly, various functions associated with the communication element 242 may be included in the modem 240 and / or the processor 212, and in one aspect, may be performed by a single processor, while in other aspects, different functions among the functions may be performed by a combination of two or more different processors. For example, in one aspect, the one or more processors 212 may include any one or any combination of the following: a data processor, or a baseband processor, or a digital signal processor, or a transmit processor, or a receive processor, or a transceiver processor associated with the transceiver 202. In other aspects, some of the features associated with the communication element 242 among the features of the one or more processors 212 and / or the modem 240 may be performed by the transceiver 202. Additionally, the memory 216 may be configured to store data used herein and / or a local version of the application 275 or the communication element 242 and / or one or more of its sub-elements executed by at least one processor 212. The memory 216 may include any type of computer-readable medium that can be used by a computer or at least one processor 212, such as random access memory (RAM), read-only memory (ROM), magnetic tape, magnetic disk, optical disk, volatile memory, non-volatile memory, and any combination thereof. For example, in one aspect, when the UE 104 is operating at least one processor 212 to execute one or more of the sub-elements of the communication element 242 and / or its sub-elements, the memory 216 may be a non-transitory computer-readable storage medium that stores one or more computer-executable codes defining one or more of the sub-elements of the communication element 242 and / or its sub-elements and / or data associated therewith. The transceiver 202 may include at least one receiver 206 and at least one transmitter 208. The receiver 206 may include hardware, firmware, and / or software code executable by a processor, the code including instructions and stored in a memory (e.g., a computer-readable medium). For example, the receiver 206 may be a radio frequency (RF) receiver. In one aspect, the receiver 206 may receive signals transmitted by at least one base station 102. Additionally, the receiver 206 may process such received signals and may also obtain measurements of the signals (such as, but not limited to, Ec / Io, signal-to-noise ratio (SNR), reference signal received power (RSRP), received signal strength indicator (RSSI), etc.). The transmitter 208 may include hardware, firmware, and / or software code executable by a processor, the code including instructions and stored in a memory (e.g., a computer-readable medium). Suitable examples of the transmitter 208 may include, but are not limited to, an RF transmitter. In addition, in one aspect, the UE 104 may include an RF front end 288, which may communicate with one or more antennas 265 and a transceiver 202 for receiving and transmitting radio transmissions (e.g., wireless communications sent by at least one base station 102 or wireless transmissions sent by the UE 104). The RF front end 288 may be connected to one or more antennas 265 and may include one or more low-noise amplifiers (LNAs) 290, one or more switches 292, one or more power amplifiers (PAs) 298, and one or more filters 296 for transmitting and receiving RF signals. In one aspect, the LNA 290 may amplify the received signal to a desired output level. In one aspect, each LNA 290 may have specified minimum and maximum gain values. In one aspect, the RF front end 288 may use one or more switches 292 to select a particular LNA 290 and its specified gain value based on the desired gain value for a particular application. In addition, for example, the RF front end 288 may use one or more PAs 298 to amplify the signal for RF output to a desired output power level. In one aspect, each PA 298 may have specified minimum and maximum gain values. In one aspect, the RF front end 288 may use one or more switches 292 to select a particular PA 298 and its specified gain value based on the desired gain value for a particular application. Additionally, for example, the RF front end 288 may use one or more filters 296 to filter the received signal to obtain an input RF signal. Similarly, in one aspect, for example, the corresponding filter 296 may be used to filter the output from the corresponding PA 298 to generate an output signal for transmission. In one aspect, each filter 296 may be connected to a particular LNA 290 and / or PA 298. In one aspect, the RF front end 288 may use one or more switches 292 to select a transmit path or a receive path using the specified filter 296, LNA 290, and / or PA 298 based on a configuration specified by the transceiver 202 and / or the processor 212. Accordingly, the transceiver 202 may be configured to transmit and receive wireless signals via the RF front end 288 and via one or more antennas 265. In one aspect, the transceiver may be tuned to operate at a specified frequency so that the UE 104 may communicate, for example, with one or more base stations 102 or with one or more cells associated with one or more base stations 102. In one aspect, for example, the modem 240 may configure the transceiver 202 to operate at a specified frequency and power level based on the UE configuration of the UE 104 and the communication protocol used by the modem 240. In one aspect, the modem 240 can be a multi-band multi-mode modem that can process digital data and communicate with the transceiver 202 to send and receive digital data using the transceiver 202. In one aspect, the modem 240 can be multi-band and configured to support multiple bands for a particular communication protocol. In one aspect, the modem 240 can be multi-mode and configured to support multiple operating networks and communication protocols. In one aspect, the modem 240 can control one or more components of the UE 104 (e.g., the RF front end 288, the transceiver 202) to enable the transmission and / or reception of signals from the network based on a specified modem configuration. In one aspect, the modem configuration can be based on the mode of the modem and the band in use. In another aspect, the modem configuration can be based on UE configuration information associated with the UE 104 provided by the network during cell selection and / or cell reselection. In one aspect, the communication component 242 can optionally include: a failure detection component 252 for detecting that the base station has not correctly received the random access message; and / or a retransmission component 254 for retransmitting the random access message. In one aspect, the processor 212 can correspond to one or more of the processors described in the UE in connection with FIG. 8. Similarly, the memory 216 can correspond to the memory described in the UE in connection with FIG. 8. Referring to FIG. 3, an example implementation of the base station 102 (e.g., the base station 102 and / or the gNB 180 as described above) can include various components, some of which have been described above, but which include components such as one or more processors 312 and a memory 316 communicating via one or more buses 344 and a transceiver 302, which can operate in conjunction with a modem 340 and a scheduling component 342 for scheduling or otherwise enabling the use of resources for transmitting and / or retransmitting random access messages. The transceiver 302, the receiver 306, the transmitter 308, one or more processors 312, the memory 316, the application 375, the bus 344, the RF front end 388, the LNA 390, the switch 392, the filter 396, the PA 398, and one or more antennas 365 can be the same or similar to the corresponding components of the UE 104 as described above, but are configured or otherwise programmed for base station operation rather than for UE operation. In one aspect, the scheduling component 342 can optionally include: a message receiving component 352 for receiving random access messages; and / or a feedback component 354 for indicating feedback for the random access messages. In one aspect, processor 312 may correspond to one or more of the processors described in connection with the base station in FIG. 8. Similarly, memory 316 may correspond to the memory described in connection with the base station in FIG. 8. FIG. 4 illustrates a flowchart of an example of a method 400 for retransmitting a random access message. In one example, UE 104 may perform the functions described in method 400 using one or more of the components described in FIGS. 1 and 2. In method 400, optionally at block 402, UE 104 may receive a broadcast signal transmission indicating one or more parameters for transmitting and / or retransmitting a first random access message. In one aspect, communication component 242, such as in combination with processor 212, memory 216, transceiver 202, etc., may receive a broadcast signal transmission indicating one or more parameters for transmitting and / or retransmitting a first random access message from a base station (e.g., base station 102). For example, as described, base station 102 may transmit a broadcast signal on a known spectrum for a wireless communication technology (e.g., LTE, NR, etc.), and the broadcast signal may include SSB, SIB, RS, etc. The SIB may indicate various system information parameters, which may include information about the random access occasion for transmitting the random access message. Additionally, in one example, the system information may include one or more parameters related to retransmitting the random access message as further described herein (e.g., different occasions for retransmission when retransmitting the random access message, preamble signal sequences, resources or modulation and coding schemes (MCS) to be used, sequences or cyclic shift combinations for demodulation reference signals (DM-RS), duration of the transmission gap to be used, explicit indicators to be used, etc.). In one example, communication component 242 may determine a random access occasion for transmitting a random access message to the base station. In another example, as further described herein, communication component 242 may additionally or alternatively determine parameters for retransmitting the random access message. In method 400, optionally at block 404, UE 104 may send an initial transmission of a random access message to the base station. In one aspect, communication component 242, for example in combination with processor 212, memory 216, transceiver 202, etc., may send an initial transmission of a random access message to the base station (e.g., base station 102). For example, communication component 242 may send the initial transmission at a random access timing determined based on the received broadcast signal transmission decision. For example, the random access timing may be indicated based on one or more parameters in the system information specifying the time period for sending the random access message (or parameters from which the time period can be determined). In one example, the random access message may be the first message in a two-step random access procedure, and the random access message may include a preamble signal portion and a payload portion, as described. For example, the preamble signal portion may be similar to the RACH preamble signal defined in LTE / NR, and the payload portion may include a PUSCH transmission of the associated PUSCH data. As described, in one example, each portion may be sent separately with a transmission gap and / or guard time between the portions, and the transmission gap and / or guard time may also be configured based on system information from the base station, which is determined according to instructions stored in memory 216 based on compliance with a radio communication technology (e.g., LTE / NR), etc. In method 400, at block 406, UE 104 may determine a failure associated with the base station's reception of the initial transmission of the random access message. In one aspect, failure detection component 252, for example in combination with processor 212, memory 216, transceiver 202, communication component 242, etc., may determine a failure associated with the base station's (e.g., base station 102) reception of the initial transmission of the random access message (e.g., the initial transmission in block 404). For example, failure detection component 252 may determine the failure based on receiving feedback from base station 102, based on detecting feedback, or not receiving a response message within a threshold time period (e.g., after sending the random access message), etc. In one example, failure detection component 252 may determine the failure as a trigger for retransmitting the random access message or at least a portion thereof, as described herein. Additionally, for example, failure detection component 252 may detect the failure as a failure to receive at least a portion of the random access message (e.g., the preamble signal portion or the payload portion), and / or may determine to retransmit that portion based on the detected failure. When a determination fails at block 406, optionally at block 408, the UE may monitor for a response message to the initial transmission for at least a period of time. In one aspect, the failure detection component 252, e.g., in combination with the processor 212, memory 216, transceiver 202, communication component 242, etc., may monitor for a response message (e.g., from the base station 102) for at least that period of time (e.g., the time period measured from the start of sending the initial transmission). In one example, the failure detection component 252 may monitor for the response message on a resource associated with receiving the response message (e.g., monitoring on the RACH or other channels and / or based on a radio network temporary identifier (RNTI) associated with the RACH procedure for the UE 104). For example, the failure detection component 252 may initialize a timer based on sending the initial transmission, and may determine that the initial transmission has not been received in the case where the timer expires before receiving a response to the initial transmission. This may indicate a failure in the base station receiving the random access message and / or may trigger a retransmission of the random access message. Additionally, for example, the failure detection component 252 may receive a response message that may indicate feedback for the random access message, which may also be a trigger for retransmitting the random access message (e.g., where the feedback indicates a negative acknowledgment (NACK) for the random access message). In one example, the response message may also indicate parameters for retransmitting the random access message. When a determination fails at block 406, optionally at block 410, the UE 104 may receive an indication for beam management from the base station and in response to the initial transmission. In one aspect, the failure detection component 252, e.g., in combination with the processor 212, memory 216, transceiver 202, communication component 242, etc., may receive an indication for beam management from the base station (e.g., the base station 102) and in response to the initial transmission. In one example, the receipt of the indication may indicate a failure in the base station receiving the random access message and / or may trigger a retransmission of the random access message, where the retransmission may be based on beam management. For example, the indication may be received as a response message to the initial transmission of the random access message, and may be received in the case where the base station fails to decode at least a portion of the random access message or otherwise does not receive at least a portion of the random access message (e.g., the preamble portion or the payload portion). The indication for beam management may specify beam information for retransmitting the random access message, and the retransmission may use a beam different from the beam utilized for sending the initial transmission (e.g., at block 404). For example, the beam management information may specify one or more parameters for beam switching from the beam used for the initial transmission or for beam refinement for the beam used for the initial transmission. For example, the initial transmission of the msgA preamble signal and payload may consider different RACH beam configurations associated with cell-specific SSB beam settings. The retransmission of the msgA preamble signal and payload may consider RACH beam switching / refinement, which is different from the beam configuration in the first transmission. In one example, the base station may command beam switching in the downlink control information (DCI) of the response message (e.g., the response message is also referred to as "msgB") for the retransmission of both the preamble signal and payload of msgA or only the payload of msgA. The retransmission of the preamble signal may assist the base station in performing receive (RX) beam switching / refinement. An example is illustrated in FIG. 6. FIG. 6 illustrates an example of resources 600 that can be allocated for the initial transmission and retransmission of random access messages. For example, resources 600 include a set of frequency / beam and time resources that can be allocated for wireless communication in the spectrum. Resources 600 include a resource configuration 602 for the initial transmission of the preamble signal portion of the random access message, and a corresponding resource configuration 604 for the transmission of the payload portion of the random access message (e.g., which includes PUSCH and the corresponding DM-RS for demodulating the signal) (e.g., separated from resource configuration 602 via a transmission gap). In one example, communication component 242 may select such resources for transmitting the respective parts of the random access message based on the random access opportunity detected at the time of resource configuration 602 and using the beam determined based on the SSB detected from base station 102. Additionally, in one example, base station 102 may specify parameters (e.g., in the SIB) for determining the transmission gap and / or frequency / beam difference between resource configuration 602 for the preamble signal portion and resource configuration 604 for the payload portion. In this example, the failure detection component 252 can detect that the base station 102 has not received the initial transmission of the preamble signal part or the payload part, or can otherwise receive a response message with feedback from the base station 102, where the feedback indicates that the base station 102 has not received at least a part of the random access message. The response message can specify an indication of beam management for retransmitting the random access message, and the indication can include an indication of the beam to be used when retransmitting the random access message (such as the beam for retransmitting the preamble signal in the resource configuration 606 and / or the beam for retransmitting the payload part in the resource configuration 608 as illustrated). Thus, in one example, the indication of beam management that can be received in the response message can include beam information for the preamble signal part and the payload part, or beam information for only one of the parts, etc. In this example, in FIG. 6, the base station can receive the first preamble signal and can indicate feedback, based on which the UE can retransmit the preamble signal in the second preamble signal part and two corresponding payload parts. For example, the UE 104 can send the first payload part associated with the initial transmission of the preamble signal based on the beam / frequency indicated for the payload part (such as the resource set A as illustrated) (e.g., in the system information), and / or can send the second payload part associated with the retransmission of the preamble signal based on a different beam / frequency indicated for the retransmitted payload part (such as the resource set B as illustrated) (e.g., in the system information, in the response message, the response message can contain a response to the preamble signal or feedback for the preamble signal, etc.). In method 400, at block 412, the UE 104 can send a retransmission of at least a part of the random access message to the base station and based on a determination of failure. In one aspect, the retransmission component 254, for example in combination with the processor 212, the memory 216, the transceiver 202, the communication component 242, etc., can send a retransmission of at least a part of the random access message to the base station (such as the base station 102) and based on a determination of failure. For example, the retransmission component 254 can retransmit at least a part of the random access message to the base station by repeating at least a part of the random access message (such as repeating the content of at least a part of the random access message in different signals, such as a redundant version). In this aspect, for example, the repetition of at least a part of the random access message can have the same transmission block size as the initial transmission of at least that part of the random access message. In this aspect, as further described herein, the base station receiving at least that part of the random access message can combine multiple received transmissions / retransmissions to improve the performance of the received signal. In one example, when transmitting a retransmission at block 412, and optionally at block 414, UE 104 may transmit the retransmission using a beam different from the initial transmission. In one aspect, the retransmission element 254, such as in combination with the processor 212, the memory 216, the transceiver 202, the communication element 242, etc., may transmit the retransmission using a beam different from the initial transmission. As described above with reference to FIG. 2, for example, the retransmission element 254 may determine a different beam configuration for retransmitting the random access message, which beam configuration may be indicated in the response message for the initial transmission or otherwise determined based on the feedback for the initial transmission of the random access message. Thus, in one example, the initial transmission and the retransmission may use different beams and / or corresponding frequency resources. In another example, when transmitting a retransmission, the retransmission element 254 may retransmit the random access message based on one or more parameters indicated in the broadcast signal transmission from the base station 102. For example, the broadcast information may include one or more parameters indicating a mechanism for distinguishing the retransmission from the initial transmission so that the base station 102 can determine which one to receive from the UE 104. For example, in this aspect, when transmitting a retransmission at block 412, and optionally at block 416, UE 104 may generate a retransmission including an indication of the retransmission. In one aspect, the retransmission element 254, such as in combination with the processor 212, the memory 216, the transceiver 202, the communication element 242, etc., may generate a retransmission including an indication of the retransmission or the type of retransmission. For example, the retransmission element 254 may generate a retransmission based on one or more parameters capable of indicating the retransmission, such as a preamble signal sequence, a random access occasion, a resource configuration, an MCS, a sequence / cyclic shift combination for DM-RS, the duration of a transmission gap, an explicit indication (e.g., a new data indicator (NDI) bit in the payload portion of the retransmission), etc. Accordingly, in one example, the retransmission component 254 and the communication component 242 may use one or more of the following: different preamble signal sequences for new data (i.e., initial transmission) and retransmission (e.g., when both the current preamble signal and the payload are retransmitted); different timing for new data and retransmission (e.g., preamble signal / PUSCH timing available via puncturing); different resource configurations or MCSs for new data and retransmission (e.g., via assigning different time / frequency offsets); different combinations of DM-RS sequences and cyclic shifts for new data and retransmission; different configurations of transmission gaps between the preamble signal and the payload for new data and retransmission, and so on. In one example, as described, these options may be configured and indicated via system information and / or via dynamic signaling from the base station 102 (e.g., in broadcast signaling or msgB, etc.). When repeating or retransmitting msgA, the base station 102 may collect and combine multiple copies of msgA to improve the performance of the received signal. In one example, it may be beneficial for the UE to explicitly indicate to the base station whether its msgA carries new data or a retransmission. FIG. 5 illustrates a flowchart of an example of a method 500 for receiving transmissions and / or retransmissions of random access messages. In one example, the base station 102 may use one or more of the components described in FIGS. 1 and 3 to perform the functions described in method 500. In method 500, optionally at block 502, the base station 102 may broadcast one or more parameters related to retransmitting random access messages. In one aspect, the scheduling component 342, for example in combination with the processor 312, the memory 316, the transceiver 302, etc., may broadcast one or more parameters related to retransmitting random access messages. For example, the scheduling component 342 may send SSB, SIB, RS, etc., which may include information for determining random access timing, beam information used when sending random access messages, parameters for retransmitting random access messages, etc., as described. In method 500, at block 504, base station 102 may receive a random access message from a UE. In one aspect, a message receiving component 352, such as in combination with a processor 312, a memory 316, a transceiver 302, a scheduling component 342, etc., may receive a random access message from a UE (e.g., UE 104). For example, the message receiving component 352 may receive the random access message in a random access occasion defined in broadcast system information based on one or more beams transmitted in an SSB, etc., as described. In one example, the random access message may include one or more parts (e.g., a preamble signal part and / or a payload part), and in one example, receiving the random access message may include receiving a part of the random access message (e.g., the preamble signal part). In one example, as described, the random access message may be the first random access message (e.g., msgA) in a two-step RACH procedure. In method 500, optionally at block 506, base station 102 may send a response message for the random access message. In one aspect, a feedback component 354, such as in combination with a processor 312, a memory 316, a transceiver 302, a scheduling component 342, etc., may send a response message for the random access message (e.g., in the case where base station 102 receives and / or decodes at least the preamble signal part of the random access message). In one example, the response message may include a random access response and / or contention resolution information (e.g., in the case where the random access message is successfully received), and in one example, the response message may be the second random access message (e.g., msgB) in a two-step RACH. In another example, the response message may include beam management information and / or feedback where the random access message is not successfully received and / or decoded (e.g., both parts). Thus, for example, when sending the response message at block 506, optionally at block 508, base station 102 may indicate beam management information in the response message. In one aspect, a feedback component 354, such as in combination with a processor 312, a memory 316, a transceiver 302, a scheduling component 342, etc., may indicate beam management information in the response message. For example, the feedback component 354 may indicate one or more of the following: the beam to be used when sending a retransmission and / or the information from which the beam may be derived, the time period on which to retransmit the random access message, etc., as described above with reference to FIG. 6. Thus, in one example, the feedback component 354 may indicate different beams for the preamble signal part and the payload part of the random access message. Additionally, for example, when sending a response message at block 506, optionally at block 510, the base station 102 may indicate feedback in the response message. In one aspect, the feedback component 354, for example, in combination with the processor 312, the memory 316, the transceiver 302, the scheduling component 342, etc., may indicate feedback (e.g., ACK / NACK feedback) in the response message. For example, the feedback may indicate whether the initial transmission of the random access message was correctly received and decoded, whether one or more portions of the initial transmission were received and decoded, etc. In method 500, optionally at block 512, the base station 102 may determine the beam and / or associated resources on which to receive the random access message. In one aspect, the message receiving component 352, for example, in combination with the processor 312, the memory 316, the transceiver 302, the scheduling component 342, etc., may determine the beam and / or associated resources on which to receive the random access message. For example, the beam and / or associated resources may indicate whether the random access message is an initial transmission or a retransmission; similarly, the transmission of the response message at 506 may indicate that the random access message is an initial transmission. In any case, at block 514, the base station 102 may determine whether the random access message is an initial message or a retransmission. In one aspect, the message receiving component 352, for example, in combination with the processor 312, the memory 316, the transceiver 302, the scheduling component 342, etc., may determine whether the random access message received from the UE (e.g., at block 504) is an initial message or a retransmission. For example, the message receiving component 352 may determine whether the random access message is an initial message or a retransmission based on one or more attributes of the message. As described, for example, the scheduling component 342 may broadcast parameters for retransmitting the random access message (such as different timing for retransmission, preamble sequences, resources to be used, sequence / cyclic shift combinations to be used for DM-RS, transmission gaps to be used, explicit indicators to be used, etc.), and the message receiving component 352 may determine whether the random access message is an initial message or a retransmission based on one of such attributes of the random access message. In another example, the feedback component 354 may specify beam management information for retransmitting the random access message, and thus the message receiving component 352 may determine whether the random access message is an initial message or a retransmission based on the beam used to send the random access message. In the case where the random access message is determined to be a retransmission at block 514, optionally at block 516, the base station 102 may combine the retransmission with the initial transmission and / or one or more other retransmissions. In one aspect, the message receiving element 352, such as in combination with the processor 312, the memory 316, the transceiver 302, the scheduling element 342, etc., may combine the retransmission with the initial transmission and / or one or more other retransmissions (e.g., to improve the performance of the received signal). As described, for example, the retransmission may be a repetition of the initial transmission of the random access message (e.g., using the same message and / or attributes, such as redundancy version, transmission block size, etc.), which may allow the base station 102 to combine transmissions to receive the message. Additionally, in one example, optionally at block 518, the base station 102 may modify the receive beam at least in part based on the retransmission. In one aspect, the message receiving element 352, such as in combination with the processor 312, the memory 316, the transceiver 302, the scheduling element 342, etc., may modify the receive beam at least in part based on the retransmission. For example, the message receiving element 352 may modify the receive beam based on the beam management information indicated in the response message to receive the retransmission of the random access message. In any case, based on determining whether the random access message is an initial transmission or a retransmission, optionally at block 520, the base station 102 may decode the random access message based on determining whether the random access message is an initial transmission or a retransmission. In one aspect, the message receiving element 352, such as in combination with the processor 312, the memory 316, the transceiver 302, the scheduling element 342, etc., may decode the random access message based on determining whether the random access message is an initial transmission or a retransmission. FIG. 7 illustrates an example of a system 700 for sending and / or providing feedback for random access messages in a two-step random access procedure. Before starting the two-step RACH, the UE receives and processes SSB / SIB / RS from the serving gNB. For example, the system 700 includes a UE 104, which may send a random access message to the gNB 102 to request the establishment of a connection therewith. In this example, the gNB 102 may send SSB, SIB, and RS 702. The UE 104 may, at 704, perform downlink synchronization, system information decoding, and / or measurement. Based on the data in the buffer of the UE 104, the UE identifier, and the system information, the UE 104 may generate a message A (msgA) and send it to the gNB at a RACH opportunity (RO) associated with an appropriate SSB beam. The UE 104 may send msgA as a preamble signal part 706 and a payload part 708. After possibly receiving and processing the msgA preamble signal / payload, the gNB 102 may proceed as follows: If both preamble signal detection and payload decoding at 710 and 712 are successful, the gNB 102 may generate a message B (msgB) at 714 and send it to the two-step RACH UE 104, in which case msgB may include a contention resolution ID or ACK for the msgA payload; If preamble signal detection is successful at 710 but payload decoding fails at 712, the gNB 102 may also generate msgB and send it to the UE 104, in which case msgB may include a random access preamble signal index (RAPID) or ACK for the msgA preamble signal, and DCI for retransmission of msgA, where the DCI may command retransmission of the preamble and payload, or only request retransmission of the payload; or If no preamble signal or payload is detected at 710 and 712, the gNB does not send msgB 714. In this example, UE 104 can monitor msgB 714 after the transmission of msgA is completed within the configured random access response (RAR) window and start a timer. If UE 104 successfully decodes msgB 704 (where msgB 704 includes the remaining information for the two-step random access procedure and / or an acknowledgement of receiving the random access message), UE 104 does not need to retransmit msgA. If UE 104 does not detect any msgB 714 when the timer expires, UE 104 can use the configured beam management option (e.g., based on system information) to perform a retransmission in the configured random access opportunity. If UE 104 detects a msgB with a negative acknowledgement for the payload and / or beam management information for transmitting the payload, UE 104 can stop the timer and retransmit msgA according to the DCI and system information (e.g., via the retransmission preamble signal portion 706 and / or the payload portion 708, which can also be indicated in msgB 714). FIG. 8 is a block diagram of a MIMO communication system 800 including base station 102 and UE 104. MIMO communication system 800 can illustrate aspects of the wireless communication access network 100 described with reference to FIG. 1. Base station 102 can be an example of aspects of base station 102 described with reference to FIG. 1. Base station 102 can be equipped with antennas 834 and 835, and UE 104 can be equipped with antennas 852 and 853. In MIMO communication system 800, base station 102 may be capable of simultaneously transmitting data on multiple communication links. Each communication link can be referred to as a "layer", and the "rank" of the communication link can indicate the number of layers used for communication. For example, in a 2x2 MIMO communication system (where base station 102 transmits two "layers"), the rank of the communication link between base station 102 and UE 104 is two. At base station 102, a transmit (Tx) processor 820 can receive data from a data source. Transmit processor 820 can process the data. Transmit processor 820 can also generate control symbols or reference symbols. A transmit MIMO processor 830 can perform spatial processing (e.g., precoding) on the data symbols, control symbols, or reference symbols (if applicable) and provide an output symbol stream to transmit modulators / demodulators 832 and 833. Each modulator / demodulator 832 to 833 can process the corresponding output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator / demodulator 832 to 833 can further process (e.g., convert to an analog signal, amplify, filter, and up-convert) the output sample stream to obtain a DL signal. In one example, the DL signals from modulators / demodulators 832 and 833 can be transmitted via antennas 834 and 835, respectively. UE 104 may be an example of various aspects of the UE 104 described with reference to FIGS. 1-2. At the UE 104, UE antennas 852 and 853 may receive DL signals from the base station 102, and may provide the received signals to modulators / demodulators 854 and 855, respectively. Each modulator / demodulator 854-855 may condition (e.g., filter, amplify, down-convert, and digitize) the respective received signal to obtain an input sample. Each modulator / demodulator 854-855 may further process the input sample (e.g., for OFDM, etc.) to obtain a received symbol. The MIMO detector 856 may obtain the received symbols from the modulators / demodulators 854 and 855, perform MIMO detection (if applicable) on the received symbols, and provide the detected symbols. The receive (Rx) processor 858 may process (e.g., demodulate, de-interleave, and decode) the detected symbols, provide decoded data for the UE 104 to a data output, and provide decoded control information to the processor 880 or the memory 882. In some cases, the processor 880 may execute stored instructions to generate the physical communication component 242 (e.g., see FIGS. 1 and 2). On the uplink (UL), at the UE 104, the transmit processor 864 may receive and process data from a data source. The transmit processor 864 may also generate reference symbols for reference signals. The symbols from the transmit processor 864 may be precoded (if applicable) by the transmit MIMO processor 866, further processed (e.g., for SC-FDM, etc.) by the modulators / demodulators 854 and 855, and transmitted to the base station 102 according to communication parameters received from the base station 102. At the base station 102, the UL signal from the UE 104 may be received by the antennas 834 and 835, processed by the modulators / demodulators 832 and 833, detected (if applicable) by the MIMO detector 836, and further processed by the receive processor 838. The receive processor 838 may provide decoded data to a data output and to the processor 840 or the memory 842. In some cases, the processor 840 may execute stored instructions to generate the physical scheduling component 342 (e.g., see FIGS. 1 and 3). The components of UE 104 may be implemented singly or in combination using one or more application-specific integrated circuits (ASICs) adapted to perform some or all of the applicable functions in hardware. Each of the described modules may be a component for performing one or more functions related to the operation of MIMO communication system 800. Similarly, the components of base station 102 may be implemented singly or in combination using one or more application-specific integrated circuits (ASICs) adapted to perform some or all of the applicable functions in hardware. Each of the described components may be a component for performing one or more functions related to the operation of MIMO communication system 800. The specific embodiments described above in connection with the accompanying drawings describe examples and do not represent the only examples that can be implemented or the only examples within the scope of the claims. As used in this specification, the word "exemplary" means "serving as an example, instance, or illustration" and does not mean "preferred" or "advantageous over other examples." For the purpose of providing an understanding of the described technology, the specific embodiments include specific details. However, the technology may be practiced without those specific details. In some instances, well-known structures and devices are illustrated in block diagram form to avoid obscuring the concepts of the described examples. Information and signals may be represented using any of a variety of different technologies and methods. For example, the data, instructions, commands, information, signals, bits, symbols, and chipsets mentioned throughout the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or particles, optical fields or particles, computer-executable code or instructions stored on a computer-readable medium, or any combination thereof. The various illustrative blocks and components described in connection with the disclosure herein may be implemented or performed using a device specifically programmed therefor, such as, but not limited to: a digital signal processor (DSP), an ASIC, a field-programmable gate array (FPGA), or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof, designed to perform the functions described herein. The specifically programmed processor may be a microprocessor, but in the alternative, the processor may also be any general processor, controller, microcontroller, or state machine. The specifically programmed 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 in conjunction with a DSP core, or any other such configuration. The functions 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 functions can be stored as one or more instructions or code on a non-transitory computer-readable medium or transmitted on the non-transitory computer-readable medium. Other examples and implementations are within the scope and spirit of the present disclosure and the appended claims. For example, due to the nature of software, the functions described above can be implemented using software executed by a processor specifically programmed therefor, hardware, firmware, hardwiring, or any combination thereof. Features for implementing the functions can physically reside at multiple locations, including being distributed such that portions of the functions are implemented at different physical locations. Additionally, as used herein (including in the claims), the "or" as used in a list of items beginning with "at least one of" indicates a separate list, such that, for example, the list "at least one of A, B, or C" means: A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Computer-readable media includes both computer storage media and communication media, the communication media including any media that facilitates transfer of a computer program from one place to another. The storage media can be any available media that can be accessed by a general purpose or special purpose computer. By way of example, and not limitation, computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk memory, magnetic disk memory or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a general purpose or special purpose computer, or a general purpose or special purpose processor. Additionally, any connection is properly termed a computer-readable media. 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, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of the media. As used herein, disk and disc include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk, and Blu-ray disc, where disks typically reproduce data magnetically, while discs optically reproduce data using lasers. Combinations of the above should also be included within the scope of computer-readable media. The foregoing description is provided to enable a person of ordinary skill in the art to make or use the subject matter herein. Various modifications to the subject matter herein will be apparent to those of ordinary skill in the art, and the generic principles defined herein can be applied to other variations without departing from the spirit or scope of the subject matter herein. In addition, although elements of the described aspects and / or embodiments are described or claimed in the singular, the plural is contemplated unless expressly stated to be limited to the singular. Further, unless otherwise stated, all or part of any aspect and / or embodiment may be used in conjunction with all or part of any other aspect and / or embodiment. Accordingly, the subject matter herein is not limited to the examples and designs described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. In the following, an overview of further examples is provided: 1. A method for wireless communication, comprising: determining, by a user equipment (UE), a failure associated with an initial transmission of a random access message received by a base station from the UE in a two-step random access procedure; and transmitting, by the UE to the base station and based on the determination of the failure, a retransmission of at least a portion of the random access message. 2. The method according to example 1, wherein the retransmission is a repetition of the random access message. 3. The method according to any one of examples 1 or 2, wherein the retransmission is transmitted on a beam different from the initial transmission. 4. The method according to any one of examples 1 to 3, further comprising: receiving, from the base station and in response to the initial transmission, an indication of beam management information, the indication including beam management signaling for beam switching or beam refinement. 5. The method according to example 4, wherein the indication of the beam management information is part of downlink control information received from the base station. 6. The method according to any one of examples 4 or 5, wherein the indication also specifies the portion of the random access message to be retransmitted as including at least one of a preamble signal portion of the random access message and / or a payload portion of the random access message. 7. The method according to any one of examples 4 to 6, wherein the indication also specifies a first beam for retransmission of the preamble signal portion of the random access message and a second beam for retransmission of the payload portion of the random access message. 8. The method according to any one of examples 1 to 7, wherein the retransmission of the portion of the random access message includes an indication of the retransmission type by the UE. 9. The method according to Example 8, wherein the indication of the retransmission type includes configuring at least one of the following: a preamble signal sequence different from the preamble signal sequence used for the initial transmission, a timing different from the timing used for the initial transmission, a resource configuration or modulation and coding scheme (MCS) different from the resource configuration or MCS used for the initial transmission, a combination of sequences and / or cyclic shifts different from the combination of sequences and / or cyclic shifts used for the initial transmission via the demodulation reference signal, a transmission gap different from the transmission gap between the preamble signal part and the payload part used for the initial transmission, or bits indicating retransmission rather than new data transmission included in the payload part of the retransmission. 10. The method according to any one of Example 8 or Example 9, further comprising: determining a mechanism for including the indication and the configuration of the retransmission based on at least one of broadcast signal transmission or dynamic signal transmission from the base station. 11. The method according to any one of Examples 1 to 10, further comprising: monitoring a response message to the initial transmission of the random access message from the base station as defined in the two-step random access procedure, wherein determining the failure includes: determining that the response message is not received within a period of time after the initial transmission. 12. The method according to any one of Examples 1 to 11, wherein the random access message includes a preamble signal, a payload including a demodulation reference signal and a physical uplink shared channel, and a configurable transmission gap. 13. A method for wireless communication, comprising: receiving, from a user equipment (UE), a random access message sent by the UE in a two-step random access procedure; determining whether the random access message is an initial transmission or a retransmission of the random access message; and decoding the random access message based on determining whether the random access message is the initial transmission or the retransmission. 14. The method according to Example 13, wherein the determining includes: determining that the random access message is the retransmission based on one or more parameters associated with the retransmission. 15. The method according to Example 14, wherein decoding the random access message is at least partially based on combining the retransmission with the initial transmission of the random access message and / or one or more other retransmissions. 16. The method according to any one of Example 14 or Example 15, wherein the one or more parameters associated with the retransmission include at least one of the following: a preamble signal sequence, a random access timing, a resource configuration or modulation and coding scheme (MCS), a combination of sequences and / or cyclic shifts for the demodulation reference signal, the duration of a transmission gap between the preamble signal part and the payload part, or bits indicating retransmission rather than new data transmission. 17. The method according to any one of Examples 14 to 16 also includes: transmitting a configuration of the one or more parameters to be used when retransmitting the random access message. 18. The method according to Example 17, wherein transmitting the configuration includes: transmitting a broadcast signal indicating the one or more parameters. 19. The method according to any one of Examples 13 to 18, wherein the determining includes: determining that the random access message is the retransmission based at least in part on receiving the initial transmission and transmitting a response message to the initial transmission, wherein the response message indicates a beam to be used when transmitting the retransmission. 20. The method according to Example 19, wherein determining that the random access message is the retransmission is based at least in part on determining the beam and / or associated resources based on which the random access message is received. 21. The method according to any one of Examples 19 or 20, wherein the response message indicates a first beam to be used when retransmitting a preamble signal portion of the random access message and a second beam to be used when retransmitting a payload portion of the random access message. 22. The method according to any one of Examples 19 to 21 also includes: modifying a receive beam of the base station for receiving the random access message based at least in part on the retransmission. 23. The method according to any one of Examples 13 to 22 also includes: transmitting a response message to the initial transmission in the two-step random access procedure. 24. The method according to Example 23, wherein the response message indicates feedback for receiving at least a portion of the initial transmission. 25. The method according to Example 24 also includes: receiving the retransmission of the random access message based at least in part on the feedback. 26. A device for wireless communication includes: a transceiver; a memory configured to store instructions; and one or more processors communicatively coupled to the transceiver and the memory, wherein the one or more processors are configured to: determine a failure associated with an initial transmission of a random access message transmitted in a two-step random access procedure by a base station; and transmit a retransmission of at least a portion of the random access message to the base station and based on determining the failure. 27. The device according to Example 26, wherein the retransmission is a repetition of the random access message. 28. The device according to any one of Examples 26 or 27, wherein the one or more processors are configured to transmit the retransmission on a beam different from the initial transmission. 29. The apparatus according to any one of Examples 26 to 28, wherein the one or more processors are further configured to: receive an indication of beam management information from the base station and in response to the initial transmission, the indication including beam management signaling for beam switching or beam refinement. 30. The apparatus according to Example 29, wherein the indication of beam management information is part of downlink control information received from the base station. 31. The apparatus according to any one of Example 29 or Example 30, wherein the indication also specifies the portion of the random access message to be retransmitted as including at least one of a preamble signal portion of the random access message and / or a payload portion of the random access message. 32. The apparatus according to any one of Examples 29 to 31, wherein the indication also specifies a first beam for retransmission of the preamble signal portion of the random access message and a second beam for retransmission of the payload portion of the random access message. 33. The apparatus according to any one of Examples 26 to 32, wherein the retransmission of the portion of the random access message includes an indication of the retransmission type. 34. The apparatus according to Example 33, wherein the indication of the retransmission type includes configuring at least one of the following: a preamble signal sequence different from the preamble signal sequence used for the initial transmission, a timing different from the timing used for the initial transmission, a resource configuration or modulation and coding scheme (MCS) different from the resource configuration or MCS used for the initial transmission, a combination of sequences and / or cyclic shifts different from the combination of sequences and / or cyclic shifts used for the initial transmission via demodulation reference signals, a transmission gap different from the transmission gap between the preamble signal portion and the payload portion used for the initial transmission, or bits indicating retransmission rather than new data transmission in the payload portion of the retransmission. 35. The apparatus according to any one of Example 33 or Example 34, wherein the one or more processors are further configured to: determine a mechanism for including the indication and the configuration of the retransmission based on at least one of broadcast signaling or dynamic signaling from the base station. 36. The apparatus according to any one of Examples 26 to 35, wherein the one or more processors are further configured to: monitor a response message to the initial transmission of the random access message from the base station as defined in the two-step random access procedure, wherein the one or more processors are configured to: determine the failure at least in part by determining that the response message has not been received within a period of time after the initial transmission. 37. The apparatus according to any one of Examples 26 to 36, wherein the random access message includes a preamble signal, a payload including a demodulation reference signal and a physical uplink shared channel, and a configurable transmission gap. 38. A device for wireless communication, comprising: a transceiver; a memory configured to store instructions; and one or more processors communicatively coupled to the transceiver and the memory, wherein the one or more processors are configured to: receive, from a user equipment (UE), a random access message sent by the UE in a two-step random access procedure; determine whether the random access message is an initial transmission or a retransmission of the random access message; and decode the random access message based on determining whether the random access message is the initial transmission or the retransmission. 39. The apparatus according to Example 38, wherein the one or more processors are configured to: determine that the random access message is the retransmission based on one or more parameters associated with the retransmission. 40. The apparatus according to Example 39, wherein the one or more processors are further configured to: decode the random access message at least in part by combining the retransmission with the initial transmission of the random access message and / or one or more other retransmissions. 41. The apparatus according to any one of Example 39 or Example 40, wherein the one or more parameters associated with the retransmission include at least one of the following: a preamble signal sequence, a random access occasion, a resource configuration or a modulation and coding scheme (MCS), a combination of a sequence and / or a cyclic shift for a demodulation reference signal, a duration of a transmission gap between a preamble signal portion and a payload portion, or a bit indicating a retransmission rather than a new data transmission. 42. The apparatus according to any one of Examples 39 to 41, wherein the one or more processors are further configured to: send a configuration of the one or more parameters to be used when retransmitting the random access message. 43. The apparatus according to Example 42, wherein the one or more processors are configured to: send the configuration in a broadcast signal indicating the one or more parameters. 44. The apparatus according to any one of Examples 38 to 43, wherein the one or more processors are configured to: determine that the random access message is the retransmission at least in part based on receiving the initial transmission and sending a response message to the initial transmission, wherein the response message indicates a beam to be used when sending the retransmission. 45. The apparatus according to Example 44, wherein the one or more processors are configured to: determine that the random access message is the retransmission at least in part based on determining the beam and / or associated resources based on which the random access message is received. 46. The apparatus according to any one of Examples 44 or 45, wherein the response message indicates a first beam to be used when retransmitting a preamble signal portion of the random access message and a second beam to be used when retransmitting a payload portion of the random access message. 47. The apparatus according to any one of Examples 44 to 46, wherein the one or more processors are further configured to: modify a reception beam at which the base station receives the random access message, at least in part based on the retransmission. 48. The apparatus according to any one of Examples 38 to 47, wherein the one or more processors are further configured to: send a response message to the initial transmission in the two-step random access procedure. 49. The apparatus according to Example 48, wherein the response message indicates feedback for receiving at least a portion of the initial transmission. 50. The apparatus according to Example 49, wherein the one or more processors are further configured to: receive the retransmission of the random access message, at least in part based on the feedback. 51. An apparatus for wireless communication, comprising: means for determining a failure associated with an initial transmission of a random access message sent in a two-step random access procedure by a base station; and means for transmitting a retransmission of at least a portion of the random access message to the base station and based on determining the failure. 52. The apparatus according to Example 51, wherein the retransmission is a repetition of the random access message. 53. The apparatus according to any one of Examples 51 or 52, wherein the means for transmitting transmits the retransmission on a beam different from the initial transmission. 54. An apparatus for wireless communication, comprising: means for receiving, from a user equipment (UE), a random access message sent by the UE in a two-step random access procedure; means for determining whether the random access message is an initial transmission or a retransmission of the random access message; and means for decoding the random access message based on determining whether the random access message is the initial transmission or the retransmission. 55. The apparatus according to Example 54, wherein the means for determining determines that the random access message is the retransmission based on one or more parameters associated with the retransmission. 56. The apparatus according to Example 55, wherein the means for decoding decodes the random access message at least in part based on combining the retransmission with the initial transmission of the random access message and / or one or more other retransmissions. 57. A computer-readable medium includes code executable by one or more processors for wireless communication, the code including code for: determining, by a user equipment (UE), a failure associated with an initial transmission of a random access message received by a base station from the UE in a two-step random access procedure; and transmitting, by the UE to the base station and based on determining the failure, a retransmission of at least a portion of the random access message. 58. The computer-readable medium according to example 57, wherein the retransmission is a repetition of the random access message. 59. The computer-readable medium according to any one of examples 57 or 58, wherein the code for transmitting transmits the retransmission on a beam different from the initial transmission. 60. A computer-readable medium includes code executable by one or more processors for wireless communication, the code including code for: receiving, from a user equipment (UE), a random access message transmitted by the UE in a two-step random access procedure; determining whether the random access message is an initial transmission or a retransmission of the random access message; and decoding the random access message based on determining whether the random access message is the initial transmission or the retransmission. 61. The computer-readable medium according to example 60, wherein the code for determining determines that the random access message is the retransmission based on one or more parameters associated with the retransmission. 62. The computer-readable medium according to example 61, wherein the code for decoding decodes the random access message based at least in part on combining the retransmission with the initial transmission of the random access message and / or one or more other retransmissions. 100: Wireless communication system and access network 102: Base station 102': Small cell 104: UE 110: Geographic coverage area 110': Coverage area 120: Communication link 132: Downlink 150: Wi-Fi access point (AP) 152: Wi-Fi station (STA) 154: Communication link 158: Device-to-device (D2D) communication link 160: Evolved Packet Core (EPC) 162: Mobility Management Entity (MME) 164: Other MME 166: Serving Gateway 168: Multimedia Broadcast Multicast Service (MBMS) Gateway 170: Broadcast Multicast Service Center (BM-SC) 172: Packet Data Network (PDN) Gateway 174: Home Subscriber Server (HSS) 176: IP service 180: gNB 182: Beamforming 184: Downlink 190: 5G Core (5GC) 192: Access and Mobility Management Function (AMF) 193: Other AMF 194: Session Management Function (SMF) 195: User Plane Function (UPF) 196: Unified Data Management (UDM) 197: IP service 202: Transceiver 206: Receiver 208: Transmitter 212: Processor 216: Memory 240: Modem 242: Communication component 244: Bus 252: Failure detection component 254: Retransmission component 265: Antenna 275: Application 290: Low Noise Amplifier (LNA) 292: Switch 296: Filter 298: Power Amplifier (PA) 302: Transceiver 306: Receiver 308: Transmitter 312: Processor 316: Memory 340: Modem 342: Scheduling component 344: Bus 352: Message receiving component 354: Feedback component 365: Antenna 375: Application 388: RF front end 390: LNA 392: Switch 396: Filter 398: PA 400: Method 402: Block 404: Block 406: Block 408: Block 410: Block 412: Block 414: Block 416: Block 500: Method 502: Block 504: Block 506: Block 508: Block 510: Block 512: Block 514: Block 516: Block 518: Block 520: Block 600: Resource 602: Resource configuration 604: Resource configuration 606: Resource configuration 608: Resource configuration 700: System 702: RS 704: msgB 706: Retransmission preamble signal part 708: Payload part 714: msgB 800: MIMO communication system 820: Transmit (Tx) processor 830: Transmit MIMO processor 832: Modulator / Demodulator 833: Modulator / Demodulator 834: Antenna835: Antenna 836: MIMO Detector 838: Receiver Processor 840: Processor 842: Memory 852: Antenna 853: Antenna 854: Modulator / Demodulator 855: Modulator / Demodulator 856: MIMO Detector 858: Receive (Rx) Processor 864: Transmit Processor 866: Transmit MIMO Processor 880: Processor 882: Memory The various aspects disclosed will be described below in conjunction with the accompanying drawings, which are provided to illustrate and not limit the various aspects disclosed, where like reference numerals represent like elements, and wherein: FIG. 1 illustrates an example of a wireless communication system in accordance with various aspects of the present case; FIG. 2 is a block diagram illustrating an example of a UE in accordance with various aspects of the present case; FIG. 3 is a block diagram illustrating an example of a base station in accordance with various aspects of the present case; FIG. 4 is a flowchart illustrating an example of a method for retransmitting random access messages in accordance with various aspects of the present case; FIG. 5 is a flowchart illustrating an example of a method for receiving retransmissions of random access messages in accordance with various aspects of the present case; FIG. 6 illustrates an example of allocating resources for transmission and / or retransmission of random access messages in accordance with various aspects of the present case; FIG. 7 illustrates an example of a system for transmitting and / or retransmitting random access messages in accordance with various aspects of the present case; and FIG. 8 is a block diagram illustrating an example of a MIMO communication system including a base station and a UE in accordance with various aspects of the present case. Domestic deposit information (please note in the order of deposit institution, date, number) None Foreign deposit information (please note in the order of deposit country, institution, date, number) None 104: UE 202: Transceiver 206: Receiver 208: Transmitter 212: Processor 216: Memory 240: Modem 242: Communication Component 244: Bus 252: Failure Detection Component 254: Retransmission Component 265: Antenna 275: Application 290: Low Noise Amplifier (LNA) 292: Switch 296: Filter 298: Power Amplifier (PA)

Claims

1. A method of wireless communication performed by a user equipment (UE), comprising the steps of: receiving a response message from a base station in response to an initial transmission of a random access message sent by the UE in a two-step random access procedure, the initial transmission being based on a beam configuration associated with a synchronization signal block (SSB); and transmitting a retransmission by the UE to the base station, based on the response message, of at least a portion of the random access message, the portion of the random access message including a payload of the random access message, wherein the retransmission is transmitted on a different beam than the initial transmission, the different beam being based on a different beam configuration than the beam configuration associated with the SSB.

2. The method as described in claim 1, wherein the retransmission of at least a portion of the random access message is sent via a different random access timing than the initial transmission.

3. A device for wireless communication, comprising: One transceiver; A memory configured to store instructions; and one or more processors communicatively coupled to the transceiver and the memory, wherein the one or more processors are configured to: receive a response message from a base station and in response to an initial transmission of a random access message sent by the device in a two-step random access procedure, the initial transmission being based on a beam configuration associated with a synchronization signal block (SSB); and send a retransmission to the base station and based on the response message of at least a portion of the random access message, the portion of the random access message including a payload of the random access message, wherein the retransmission is transmitted on a different beam than the initial transmission, the different beam being based on a different beam configuration than the beam configuration associated with the SSB.

4. The apparatus as claimed in claim 3, wherein the retransmission of at least a portion of the random access message is transmitted via a different random access timing than the initial transmission.

5. An apparatus for wireless communication, comprising: One transceiver; A memory configured to store instructions; one or more processors communicatively coupled to the transceiver and the memory, wherein the one or more processors are configured to: receive from a user equipment (UE) an initial transmission of a random access message in a two-step random access procedure, the initial transmission being based on a beam configuration associated with a synchronization signal block (SSB); send a response message in response to the initial transmission of the random access message; and receive from the UE a retransmission of at least a portion of the random access message, the portion of the random access message including a payload of the random access message, wherein the retransmission is received on a different beam than the initial transmission, the different beam being based on a different beam configuration than the beam configuration associated with the SSB.

6. The apparatus as claimed in claim 5, wherein the retransmission of at least a portion of the random access message is received via a different random access timing than the initial transmission.

7. An apparatus for wireless communication, comprising: One transceiver; A memory configured to store instructions; one or more processors communicatively coupled to the transceiver and the memory, wherein the one or more processors are configured to: receive an initial transmission of a random access message in a two-step random access procedure from a user equipment (UE); send a response message to the UE in response to the initial transmission of the random access message; receive from the UE a retransmission of at least a portion of the random access message, the portion of the random access message including a payload of the random access message, wherein the one or more processors are configured to receive the retransmission on a different beam than the initial transmission, and all retransmissions on the different beam are based on the response message.

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