# US 12,225,592 B2 · Mapping one preamble to multiple physical uplink shared channel resource units for two-step random access procedure > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,225,592 B2 - Document ID: US12225592B2 - Status: Granted - Kind: B2 - Application number: 17/594,704 - Filed: 2020-05-07 - Published: 2022-06-30 - Granted: 2025-02-11 - Earliest claimed: 2019-05-30 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Jing Lei; Seyong Park; Yiqing Cao; Peter Gaal; Wanshi Chen - Web page: https://patentgrep.com/patent/US12225592B2 ## CPC - H04W 74/006: {in the downlink, i.e. towards the terminal} - H04W 74/0841: {with collision treatment} - H04L 1/0003: {by switching between different modulation schemes} - H04L 5/0012: {Hopping in multicarrier systems} - H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH} - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 5/0058: {Allocation criteria} - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 74/004: {in the uplink, i.e. towards network} - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04L 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals} - H04W 74/08: Non-scheduled access, e.g. ALOHA (hybrid access H04W74/02) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract Aspects are provided to support payloads for msgA transmission in a two-step random access (RACH) procedure by providing a one-to-many mapping arrangement between preambles and physical uplink shared channel (PUSCH) resource units (PRUs). A preamble is determined by the UE which is mapped to one or more groups of PRUs to support piggybacking of uplink control information (UCI), frequency hopping on PUSCH, and multiple-slot repetition for msgA transmissions. By piggybacking UCI to a payload in msgA, flexibility may be provided in the selection of MCS and waveform as well as resource allocation for demodulation reference signals (DMRS) and PUSCH in PRUs. Moreover, by allowing a payload to hop to different frequencies on PUSCH during the transmission of msgA, a gain in frequency diversity and interference averaging may be provided, and by enabling a payload to repeat across multiple slots in msgA transmission, coverage enhancement and/or reliability may be increased. ## Claims ### Claim 1 A method of wireless communication at a user equipment (UE), comprising: receiving, from a base station, random access configuration information; determining a preamble for a random access message from a preamble group for a random access occasion (RO), wherein the random access message comprises a MsgA of a 2-step random access procedure; determining one or more physical uplink shared channel resource unit (PRU) resource sets for the random access message based on the preamble and a mapping based on the random access configuration information, wherein the random access configuration information maps the preamble in the preamble group to a first PRU at a first frequency and a second PRU at a second frequency based on a frequency hop for the MsgA; and transmitting, to the base station, the random access message including the preamble and a payload, wherein the payload is transmitted using one or more PRU groups of the one or more PRU resource sets based on the mapping. ### Claim 2 (depends on 1) The method of claim 1, wherein the one or more PRU resource sets comprise a first PRU resource set and a second PRU resource set. ### Claim 3 (depends on 2) The method of claim 2, wherein the random access message comprises uplink control information (UCI) transmitted using a first PRU group in the first PRU resource set, and the UCI allocates a second PRU group in the second PRU resource set for the payload of the random access message. ### Claim 4 (depends on 3) The method of claim 3, wherein the UCI includes at least one of a modulation control scheme (MCS), a transport block size (TBS), a waveform, resource allocation information for the payload, a frequency hopping pattern for the payload, or multi-slot repetition information for the payload. ### Claim 5 (depends on 2) The method of claim 2, wherein the random access message is transmitted according to a frequency hopping pattern using the first PRU resource set and the second PRU resource set, wherein the random access message is transmitted using a first PRU group in the first PRU resource set in the first frequency of the frequency hopping pattern and using a second PRU group in the second PRU resource set in the second frequency of the frequency hopping pattern. ### Claim 6 (depends on 1) The method of claim 1, wherein each PRU group of the one or more PRU groups comprises a time-frequency resource associated with a physical uplink shared channel (PUSCH) transmission and an antenna port and sequence scrambling identification associated with a demodulation reference signal (DMRS) transmission. ### Claim 7 (depends on 1) The method of claim 1, wherein the one or more PRU resource sets comprise a plurality of PRU resource sets associated with the preamble group configured for the RO, and wherein the plurality of PRU resource sets are orthogonal in at least one of a time domain, a frequency domain or a code domain. ### Claim 8 (depends on 1) The method of claim 1, wherein the one or more PRU resource sets comprise a plurality of PRUs associated with the preamble group configured for the RO, and wherein the preamble determined by the UE is associated with multiple PRU groups in a single PRU resource set. ### Claim 9 (depends on 1) The method of claim 1, wherein the one or more PRU resource sets comprise a plurality of PRUs associated with the preamble group configured for the RO, and wherein the preamble determined by the UE is associated with at least one PRU group in different PRU resource sets. ### Claim 10 (depends on 9) The method of claim 9, wherein the preamble group comprises a first set of preambles and a second set of preambles, each preamble of the first set of preambles being associated with multiple PRU groups in the one or more PRU resource sets, and at least one preamble of the second set of preambles being associated with a single PRU group in one of the one or more PRU resource sets. ### Claim 11 (depends on 1) The method of claim 1, wherein the one or more PRU resource sets comprise a first PRU resource set and a second PRU resource set, wherein the random access message is transmitted according to a multi-slot repetition pattern across the first PRU resource set and the second PRU resource set, wherein a first transmission of the random access message is using a first PRU group in the first PRU resource set, and a second transmission of the random access message is using a second PRU group in the second PRU resource set. ### Claim 12 (depends on 1) The method of claim 1, wherein the one or more PRU resource sets comprise a first PRU resource set and a second PRU resource set, wherein uplink control information (UCI) is transmitted in a first PRU group of the first PRU resource set, the UCI allocating a second PRU group in the second PRU resource set for the payload, wherein the payload is transmitted in the second PRU group of the second PRU resource set, and wherein the payload is transmitted using frequency hopping or slot repetition across the second PRU group and a third PRU group in the second PRU resource set. ### Claim 13 (depends on 12) The method of claim 12, wherein the payload is transmitted in the second PRU group and the third PRU group based on frequency hopping information in the UCI, wherein the UCI includes one of intra-slot or inter-slot physical resource block (PRB) hopping information. ### Claim 14 (depends on 12) The method of claim 12, wherein the payload is transmitted in the second PRU group and the third PRU group based on multi-slot repetition information in the UCI, wherein the payload spans one of multiple consecutive slots or non-consecutive slots in a time domain. ### Claim 15 An apparatus for wireless communication, comprising: means for receiving, from a base station, random access configuration information; means for determining a preamble for a random access message from a preamble group for a random access occasion (RO), wherein the random access message comprises a MsgA of a 2-step random access procedure; wherein the means for determining is further configured to determine one or more physical uplink shared channel resource unit (PRU) resource sets for the random access message based on the preamble and a mapping based on the random access configuration information, wherein the random access configuration information maps the preamble in the preamble group to a first PRU at a first frequency and a second PRU at a second frequency based on a frequency hop for the MsgA; and means for transmitting, to the base station, the random access message including the preamble and a payload, wherein the means for transmitting is configured to transmit the payload using one or more PRU groups of the one or more PRU resource sets based on the mapping. ### Claim 16 (depends on 15) The apparatus of claim 15, wherein the one or more PRU resource sets comprise a first PRU resource set and a second PRU resource set. ### Claim 17 (depends on 16) The apparatus of claim 16, wherein the random access message comprises uplink control information (UCI) transmitted using a first PRU group in the first PRU resource set, and the UCI allocates a second PRU group in the second PRU resource set for the payload of the random access message. ### Claim 18 (depends on 16) The apparatus of claim 16, wherein the random access message is transmitted according to a frequency hopping pattern using the first PRU resource set and the second PRU resource set, wherein the random access message is transmitted using a first PRU group in the first PRU resource set in the first frequency of the frequency hopping pattern and using a second PRU group in the second PRU resource set in the second frequency of the frequency hopping pattern. ### Claim 19 (depends on 16) The apparatus of claim 16, wherein the random access message is transmitted according to a multi-slot repetition pattern across the first PRU resource set and the second PRU resource set, wherein a first transmission of the random access message is using a first PRU group in the first PRU resource set, and a second transmission of the random access message is using a second PRU group in the second PRU resource set. ### Claim 20 (depends on 16) The apparatus of claim 16, wherein uplink control information (UCI) is transmitted in a first PRU group of the first PRU resource set, the UCI allocating a second PRU group in the second PRU resource set for the payload, wherein the payload is transmitted in the second PRU group of the second PRU resource set, and wherein the payload is transmitted using frequency hopping or slot repetition across the second PRU group and a third PRU group in the second PRU resource set. ### Claim 21 An apparatus for wireless communication, comprising: memory; and at least one processor coupled to the memory and configured to: receive, from a base station, random access configuration information; determine a preamble for a random access message from a preamble group for a random access occasion (RO), wherein the random access message comprises a MsgA of a 2-step random access procedure; determine one or more physical uplink shared channel resource unit (PRU) resource sets for the random access message based on the preamble and a mapping based on the random access configuration information, wherein the random access configuration information maps the preamble in the preamble group to a first PRU at a first frequency and a second PRU at a second frequency based on a frequency hop for the MsgA; and transmit, to the base station, the random access message including the preamble and a payload, wherein the at least one processor is configured to transmit the payload using one or more PRU groups of the one or more PRU resource sets based on the mapping. ### Claim 22 (depends on 21) The apparatus of claim 21, wherein the one or more PRU resource sets comprise a first PRU resource set and a second PRU resource set. ### Claim 23 (depends on 22) The apparatus of claim 22, wherein the random access message comprises uplink control information (UCI) transmitted using a first PRU group in the first PRU resource set, and the UCI allocates a second PRU group in the second PRU resource set for the payload of the random access message. ### Claim 24 (depends on 22) The apparatus of claim 22, wherein the random access message is transmitted according to a frequency hopping pattern using the first PRU resource set and the second PRU resource set, wherein the random access message is transmitted using a first PRU group in the first PRU resource set in the first frequency of the frequency hopping pattern and using a second PRU group in the second PRU resource set in the second frequency of the frequency hopping pattern. ### Claim 25 (depends on 22) The apparatus of claim 22, wherein the random access message is transmitted according to a multi-slot repetition pattern across the first PRU resource set and the second PRU resource set, wherein a first transmission of the random access message is using a first PRU group in the first PRU resource set, and a second transmission of the random access message is using a second PRU group in the second PRU resource set. ### Claim 26 (depends on 22) The apparatus of claim 22, wherein uplink control information (UCI) is transmitted in a first PRU group of the first PRU resource set, the UCI allocating a second PRU group in the second PRU resource set for the payload, wherein the payload is transmitted in the second PRU group of the second PRU resource set, and wherein the payload is transmitted using frequency hopping or slot repetition across the second PRU group and a third PRU group in the second PRU resource set. ### Claim 27 A non-transitory computer-readable medium storing computer executable code, the code when executed by at least one processor cause the at least one processor to: receive, from a base station, random access configuration information; determine a preamble for a random access message from a preamble group for a random access occasion (RO), wherein the random access message comprises a MsgA of a 2-step random access procedure; determine one or more physical uplink shared channel resource unit (PRU) resource sets for the random access message based on the preamble and a mapping based on the random access configuration information, wherein the random access configuration information maps the preamble in the preamble group to a first PRU at a first frequency and a second PRU at a second frequency based on a frequency hop for the MsgA; and transmit, to the base station, the random access message including the preamble and a payload, wherein the processor transmits the payload using one or more PRU groups of the one or more PRU resource sets based on the mapping. ### Claim 28 A method of wireless communication at a base station, comprising: transmitting, to a user equipment (UE), random access configuration information, wherein the random access configuration information is transmitted using at least one of system information or radio resource control (RRC) signaling, and wherein the random access configuration information includes a mapping of a preamble for a MsgA of a 2-step random access procedure to one or more physical uplink shared channel resource unit (PRU) resource sets, wherein the random access configuration information maps the preamble in a preamble group to a first PRU at a first frequency and a second PRU at a second frequency based on a frequency hop for the MsgA; and receiving a random access message from the UE including the preamble on a random access occasion (RO), wherein the preamble is from the preamble group, wherein the random access message includes a payload received in one or more PRU groups of the one or more PRU resource sets based on the mapping. ### Claim 29 (depends on 28) The method of claim 28, wherein the one or more PRU resource sets comprise a first PRU resource set and a second PRU resource set. ### Claim 30 (depends on 29) The method of claim 29, wherein the random access message comprises uplink control information (UCI) received using a first PRU group in the first PRU resource set, and the UCI allocates a second PRU group in the second PRU resource set for the payload of the random access message. ### Claim 31 (depends on 29) The method of claim 29, wherein the random access message is received according to a frequency hopping pattern using the first PRU resource set and the second PRU resource set, wherein the random access message is received using a first PRU group in the first PRU resource set in the first frequency of the frequency hopping pattern and using a second PRU group in the second PRU resource set in the second frequency of the frequency hopping pattern. ### Claim 32 (depends on 31) The method of claim 31, wherein the payload is received using frequency hopping in the first PRU group and the second PRU group. ### Claim 33 (depends on 28) The method of claim 28, wherein the one or more PRU resource sets comprise a plurality of PRU resource sets associated with the preamble, and wherein the plurality of PRU resource sets are orthogonal in at least one of a time domain, a frequency domain, or a code domain. ### Claim 34 (depends on 28) The method of claim 28, wherein the one or more PRU resource sets comprise a plurality of PRU resource sets associated with the preamble, and wherein the preamble is associated with multiple PRU groups in a single PRU resource set. ### Claim 35 (depends on 28) The method of claim 28, wherein the one or more PRU resource sets comprise a plurality of PRU resource sets associated with the preamble, and wherein the preamble is associated with at least one PRU group in different PRU resource sets. ### Claim 36 (depends on 28) The method of claim 28, wherein the one or more PRU resource sets comprise a first PRU resource set and a second PRU resource set, wherein the random access message is received according to a multi-slot repetition pattern across the first PRU resource set and the second PRU resource set, wherein the random access message is received using a first PRU group in the first PRU resource set in a first slot of the multi-slot repetition pattern and using a second PRU group in the second PRU resource set in a second slot of the multi-slot repetition pattern. ### Claim 37 (depends on 36) The method of claim 36, wherein the payload is received using slot repetition in the first PRU group and the second PRU group. ### Claim 38 (depends on 28) The method of claim 28, wherein the one or more PRU resource sets comprise a first PRU resource set and a second PRU resource set, wherein uplink control information (UCI) is received in a first PRU group of the first PRU resource set, the UCI allocating a second PRU group in the second PRU resource set for the payload, wherein the payload is received in the second PRU group of the second PRU resource set, and wherein the payload is frequency hopped across the second PRU group and a third PRU group in the second PRU resource set. ### Claim 39 (depends on 28) The method of claim 28, wherein the one or more PRU resource sets comprise a first PRU resource set and a second PRU resource set, wherein uplink control information (UCI) is received in a first PRU group of the first PRU resource set, the UCI allocating a second PRU group in the second PRU resource set for the payload, wherein the payload is received in the second PRU group of the second PRU resource set, and wherein the payload is repeated across the second PRU group and a third PRU group in the second PRU resource set. ### Claim 40 An apparatus for wireless communication, comprising: means for transmitting, to a user equipment (UE), random access configuration information, wherein the random access configuration information is transmitted using at least one of system information or radio resource control (RRC) signaling, and wherein the random access configuration information includes a mapping of a preamble for a MsgA of a 2-step random access procedure to one or more physical uplink shared channel resource unit (PRU) resource sets, wherein the random access configuration information maps the preamble in a preamble group to a first PRU at a first frequency and a second PRU at a second frequency based on a frequency hop for the MsgA; and means for receiving a random access message from the UE including the preamble on a random access occasion (RO), wherein the preamble is from the preamble group, wherein the random access message includes a payload received in one or more PRU groups of the one or more PRU resource sets based on the mapping. ### Claim 41 (depends on 40) The apparatus of claim 40, wherein the one or more PRU resource sets comprise a first PRU resource set and a second PRU resource set. ### Claim 42 (depends on 41) The apparatus of claim 41, wherein the random access message comprises uplink control information (UCI) received using a first PRU group in the first PRU resource set, and the UCI allocates a second PRU group in the second PRU resource set for the payload of the random access message. ### Claim 43 (depends on 41) The apparatus of claim 41, wherein the random access message is received according to a frequency hopping pattern using the first PRU resource set and the second PRU resource set, wherein the random access message is received using a first PRU group in the first PRU resource set in the first frequency of the frequency hopping pattern and using a second PRU group in the second PRU resource set in the second frequency of the frequency hopping pattern. ### Claim 44 (depends on 41) The apparatus of claim 41, wherein the random access message is received according to a multi-slot repetition pattern across the first PRU resource set and the second PRU resource set, wherein the random access message is received using a first PRU group in the first PRU resource set in a first slot of the multi-slot repetition pattern and using a second PRU group in the second PRU resource set in a second slot of the multi-slot repetition pattern. ### Claim 45 (depends on 41) The apparatus of claim 41, wherein uplink control information (UCI) is received in a first PRU group of the first PRU resource set, the UCI allocating a second PRU group in the second PRU resource set for the payload, wherein the payload is received in the second PRU group of the second PRU resource set, and wherein the payload is frequency hopped across the second PRU group and a third PRU group in the second PRU resource set. ### Claim 46 (depends on 41) The apparatus of claim 41, wherein uplink control information (UCI) is received in a first PRU group of the first PRU resource set, the UCI allocating a second PRU group in the second PRU resource set for the payload, wherein the payload is received in the second PRU group of the second PRU resource set, and wherein the payload is repeated across the second PRU group and a third PRU group in the second PRU resource set. ### Claim 47 An apparatus for wireless communication, comprising: memory; and at least one processor coupled to the memory and configured to: transmit, to a user equipment (UE), random access configuration information, wherein the random access configuration information is transmitted using at least one of system information or radio resource control (RRC) signaling, and wherein the random access configuration information includes a mapping of a preamble for a MsgA of a 2-step random access procedure to one or more physical uplink shared channel resource unit (PRU) resource sets, wherein the random access configuration information maps the preamble in a preamble group to a first PRU at a first frequency and a second PRU at a second frequency based on a frequency hop for the MsgA; and receive a random access message from the UE including the preamble on a random access occasion (RO), wherein the preamble is from the preamble group, wherein the random access message includes a payload received in one or more PRU groups of the one or more PRU resource sets based on the mapping. ### Claim 48 (depends on 47) The apparatus of claim 47, wherein the one or more PRU resource sets comprise a first PRU resource set and a second PRU resource set. ### Claim 49 (depends on 48) The apparatus of claim 48, wherein the random access message comprises uplink control information (UCI) received using a first PRU group in the first PRU resource set, and the UCI allocates a second PRU group in the second PRU resource set for the payload of the random access message. ### Claim 50 (depends on 48) The apparatus of claim 48, wherein the random access message is received according to a frequency hopping pattern using the first PRU resource set and the second PRU resource set, wherein the random access message is received using a first PRU group in the first PRU resource set in the first frequency of the frequency hopping pattern and using a second PRU group in the second PRU resource set in the second frequency of the frequency hopping pattern. ### Claim 51 (depends on 48) The apparatus of claim 48, wherein the random access message is received according to a multi-slot repetition pattern across the first PRU resource set and the second PRU resource set, wherein the random access message is received using a first PRU group in the first PRU resource set in a first slot of the multi-slot repetition pattern and using a second PRU group in the second PRU resource set in a second slot of the multi-slot repetition pattern. ### Claim 52 (depends on 48) The apparatus of claim 48, wherein uplink control information (UCI) is received in a first PRU group of the first PRU resource set, the UCI allocating a second PRU group in the second PRU resource set for the payload, wherein the payload is received in the second PRU group of the second PRU resource set, and wherein the payload is frequency hopped across the second PRU group and a third PRU group in the second PRU resource set. ### Claim 53 (depends on 48) The apparatus of claim 48, wherein uplink control information (UCI) is received in a first PRU group of the first PRU resource set, the UCI allocating a second PRU group in the second PRU resource set for the payload, wherein the payload is received in the second PRU group of the second PRU resource set, and wherein the payload is repeated across the second PRU group and a third PRU group in the second PRU resource set. ### Claim 54 A non-transitory computer-readable medium storing computer executable code, the code when executed by a processor cause the processor to: transmit, to a user equipment (UE), random access configuration information, wherein the random access configuration information is transmitted using at least one of system information or radio resource control (RRC) signaling, and wherein the random access configuration information includes a mapping of a preamble for a MsgA of a 2-step random access procedure to one or more physical uplink shared channel resource unit (PRU) resource sets, wherein the random access configuration information maps the preamble in a preamble group to a first PRU at a first frequency and a second PRU at a second frequency based on a frequency hop for the MsgA; and receive a random access message from the UE including the preamble on a random access occasion (RO), wherein the preamble is from the preamble group, wherein the random access message includes a payload received in one or more PRU groups of the one or more PRU resource sets based on the mapping. ### Claim 55 (depends on 21) The apparatus of claim 21, wherein a first set of preambles is associated with at least a first PRU group in the one or more PRU resource sets, and a second set of preambles is associated with at least a second PRU group in the one or more PRU resource sets. ### Claim 56 (depends on 21) The apparatus of claim 21, wherein the MsgA has a configured resource size. ### Claim 57 (depends on 21) The apparatus of claim 21, wherein the MsgA has a configured MCS.