# US 11,310,834 B2 · Priority handling for a random access message that includes a preamble and a payload > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,310,834 B2 - Document ID: US11310834B2 - Status: Granted - Kind: B2 - Application number: 16/803,583 - Filed: 2020-02-27 - Published: 2020-09-24 - Granted: 2022-04-19 - Earliest claimed: 2019-03-18 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Jing Lei; Wanshi Chen - Web page: https://patentgrep.com/patent/US11310834B2 ## CPC - H04W 74/0833: Random access procedures, e.g. with 4-step access - 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 25/0226: {sounding signals per se} - H04W 52/242: {taking into account path loss} - H04W 52/265: {taking into account the quality of service QoS} - H04W 52/50: at the moment of starting communication in a multiple access environment - H04W 72/0473: {the resource being transmission power} - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - H04W 52/34: TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading - H04W 74/0836: with 2-step access - 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 This disclosure provides systems, methods and apparatus for assisting a user equipment (UE) with balancing quality of service (QoS) requirements (such as access latency or reliability requirements) and consumption of high priority network resources (such as for load balancing) when transmitting a random access message (RAM) in a two-step random access channel (RACH) procedure. As a result, the UE may be capable of satisfying QoS requirements for the RAM while reducing an impact of transmission of the RAM on other uplink transmissions. Furthermore, some techniques and apparatuses described herein assist a UE with prioritizing portions of the RAM in different UE operating modes, such as a dual connectivity mode, a carrier aggregation mode, or a supplemental uplink mode. Some techniques and apparatuses described herein employ cross-carrier scheduling, dynamic power sharing, or dynamic power control to achieve these and other performance improvements. ## Claims ### Claim 1 A method of wireless communication performed by an apparatus of a user equipment (UE), comprising: determining a first transmit power for transmission of a preamble of a random access message based at least in part on one or more carriers, wherein the one or more carriers are to transmit the preamble or a payload of the random access message, and wherein a priority of one or more of the preamble or the payload is associated with the one or more carriers; determining a second transmit power for transmission of the payload associated with the one or more carriers, wherein the payload includes a physical uplink shared channel (PUSCH) communication, and wherein the random access message includes both the preamble and the payload; transmitting the preamble using the first transmit power; and transmitting the payload using the second transmit power, wherein the first transmit power and the second transmit power are associated with a transmission prioritization used to accommodate a power constraint, and wherein transmitting the preamble using the first transmit power is prioritized over other uplink transmissions that overlap with the preamble. ### Claim 2 (depends on 1) The method of claim 1, wherein the first transmit power is determined based at least in part on a first set of parameters, wherein the second transmit power is determined based at least in part on a second set of parameters, and wherein the first set of parameters is different from the second set of parameters. ### Claim 3 (depends on 2) The method of claim 2, wherein the first set of parameters includes at least one of: a transmission occasion in which the preamble is to be transmitted, a pathloss measurement for a carrier to be used to transmit the preamble, a transmission bandwidth assigned for transmission of the preamble, a power spectral density target for transmission of the preamble, or a pathloss compensation factor for transmission of the preamble. ### Claim 4 (depends on 2) The method of claim 2, wherein the second set of parameters includes at least one of: a transmission occasion in which the payload is to be transmitted, a pathloss measurement for a carrier to be used to transmit the payload, a transmission bandwidth assigned for transmission of the payload, a power spectral density target for transmission of the payload, or a pathloss compensation factor for transmission of the payload. ### Claim 5 (depends on 1) The method of claim 1, wherein at least one of the first transmit power or the second transmit power is prioritized over a transmit power used for the other uplink transmissions, wherein the other uplink transmission overlap with the preamble or the payload. ### Claim 6 (depends on 5) The method of claim 5, wherein the other uplink transmissions include a physical uplink control channel (PUCCH) communication. ### Claim 7 (depends on 5) The method of claim 5, wherein the other uplink transmissions include a PUSCH transmission. ### Claim 8 (depends on 1) The method of claim 1, wherein the preamble and the payload are transmitted using a same carrier. ### Claim 9 An apparatus for wireless communication, comprising: a memory; and one or more processors coupled to the memory, the one or more processors configured to: determine a first transmit power for transmission of a preamble of a random access message based at least in part on one or more carriers, wherein the one or more carriers are to transmit the preamble or a payload of the random access message, and wherein a priority of one or more of the preamble or the payload is associated with the one or more carriers; determine a second transmit power for transmission of the payload associated with the one or more carriers, wherein the payload includes a physical uplink shared channel (PUSCH) communication, and wherein the random access message includes both the preamble and the payload; transmit the preamble using the first transmit power; and transmit the payload using the second transmit power, wherein the first transmit power and the second transmit power are associated with a transmission prioritization used to accommodate a power constraint, and wherein transmitting the preamble using the first transmit power is prioritized over other uplink transmission that overlap with the preamble. ### Claim 10 (depends on 9) The apparatus of claim 9, wherein the first transmit power is determined based at least in part on a first set of parameters, wherein the second transmit power is determined based at least in part on a second set of parameters, and wherein the first set of parameters is different from the second set of parameters. ### Claim 11 (depends on 10) The apparatus of claim 10, wherein the first set of parameters includes at least one of: a transmission occasion in which the preamble is to be transmitted, a pathloss measurement for a carrier to be used to transmit the preamble, a transmission bandwidth assigned for transmission of the preamble, a power spectral density target for transmission of the preamble, or a pathloss compensation factor for transmission of the preamble. ### Claim 12 (depends on 10) The apparatus of claim 10, wherein the second set of parameters includes at least one of: a transmission occasion in which the payload is to be transmitted, a pathloss measurement for a carrier to be used to transmit the payload, a transmission bandwidth assigned for transmission of the payload, a power spectral density target for transmission of the payload, or a pathloss compensation factor for transmission of the payload. ### Claim 13 (depends on 9) The apparatus of claim 9, wherein at least one of the first transmit power or the second transmit power is prioritized over a transmit power used for the other uplink transmissions, wherein the other uplink transmissions overlap with the preamble or the payload. ### Claim 14 (depends on 13) The apparatus of claim 13, wherein the other uplink transmissions include a physical uplink control channel (PUCCH) communication. ### Claim 15 (depends on 13) The apparatus of claim 13, wherein the other uplink transmissions include a PUSCH transmission. ### Claim 16 (depends on 9) The apparatus of claim 9, wherein the random access message is a first message of a two-step random access procedure that includes both the preamble and the payload. ### Claim 17 (depends on 9) The apparatus of claim 9, wherein the preamble and the payload are transmitted using a same carrier. ### Claim 18 A method of wireless communication performed by an apparatus of a user equipment (UE), comprising: determining a first transmit power for transmission of a preamble of a random access message based at least in part on a first set of parameters, wherein the first set of parameters, associated with the determining the first transmit power for transmission of the preamble, includes a carrier to transmit the preamble and a payload of the random access message; determining a second transmit power for transmission of the payload associated with a second set of parameters, wherein the random access message includes both the preamble and the payload, and wherein the second set of parameters, associated with the determining the second transmit power for transmission of the payload, includes the carrier; transmitting the preamble using the first transmit power; and transmitting the payload using the second transmit power. ### Claim 19 (depends on 18) The method of claim 18, wherein the first set of parameters is different from the second set of parameters. ### Claim 20 (depends on 18) The method of claim 18, wherein the first set of parameters further includes at least one of: a transmission occasion in which the preamble is to be transmitted, a pathloss measurement for the carrier, a transmission bandwidth assigned for transmission of the preamble, a power spectral density target for transmission of the preamble, or a pathloss compensation factor for transmission of the preamble. ### Claim 21 (depends on 18) The method of claim 18, wherein the second set of parameters further includes at least one of: a transmission occasion in which the payload is to be transmitted, a pathloss measurement for the carrier, a transmission bandwidth assigned for transmission of the payload, a power spectral density target for transmission of the payload, or a pathloss compensation factor for transmission of the payload. ### Claim 22 (depends on 18) The method of claim 18, wherein at least one of the first transmit power or the second transmit power is prioritized over a transmit power used for other uplink transmissions that overlap with the preamble or the payload. ### Claim 23 An apparatus for wireless communication, comprising: a memory; and one or more processors coupled to the memory, the one or more processors configured to: determine a first transmit power for transmission of a preamble of a random access message based at least in part on a first set of parameters, wherein the first set of parameters, associated with the determining the first transmit power for transmission of the preamble, includes a carrier to transmit the preamble and a payload of the random access message; determine a second transmit power for transmission of the payload associated with a second set of parameters, wherein the random access message includes both the preamble and the payload, and wherein the second set of parameters, associated with the determining the second transmit power for transmission of the payload, includes the carrier; transmit the preamble using the first transmit power; and transmit the payload using the second transmit power. ### Claim 24 (depends on 23) The apparatus of claim 23, wherein the first set of parameters is different from the second set of parameters. ### Claim 25 (depends on 23) The apparatus of claim 23, wherein the first set of parameters further includes at least one of: a transmission occasion in which the preamble is to be transmitted, a pathloss measurement for the carrier, a transmission bandwidth assigned for transmission of the preamble, a power spectral density target for transmission of the preamble, or a pathloss compensation factor for transmission of the preamble. ### Claim 26 (depends on 23) The apparatus of claim 23, wherein the second set of parameters further includes at least one of: a transmission occasion in which the payload is to be transmitted, a pathloss measurement for the carrier, a transmission bandwidth assigned for transmission of the payload, a power spectral density target for transmission of the payload, or a pathloss compensation factor for transmission of the payload. ### Claim 27 (depends on 23) The apparatus of claim 23, wherein at least one of the first transmit power or the second transmit power is prioritized over a transmit power used for other uplink transmissions that overlap with the preamble or the payload. ### Claim 28 (depends on 27) The apparatus of claim 27, wherein the other uplink transmissions include a sounding reference signal (SRS). ### Claim 29 (depends on 23) The apparatus of claim 23, wherein the random access message is a first message of a two-step random access procedure, wherein the first set of parameters further includes an index of transmission occasion for the first message of the two-step random access procedure, and wherein the second set of parameters further includes the index of transmission occasion for the first message of the two-step random access procedure. ### Claim 30 (depends on 23) The apparatus of claim 23, wherein the first transmit power and the second transmit power are associated with a transmission prioritization used to accommodate a power constraint when the apparatus is operating in a supplemental uplink mode.