# US 12,764,778 B2 · Coverage enhancement of Msg3 and MsgA transmissions on physical uplink shared channel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,764,778 B2 - Document ID: US12764778B2 - Status: Granted - Kind: B2 - Application number: 18/018,288 - Filed: 2021-08-04 - Published: 2023-08-17 - Granted: 2026-10-13 - Earliest claimed: 2020-08-04 - Assignees: Telefonaktiebolaget LM Ericsson (publ) - Applicants: Telefonaktiebolaget LM Ericsson (publ) - Inventors: Johan Axnäs; Robert Mark Harrison; Ling Su; Zhipeng Lin; David Astely - Web page: https://patentgrep.com/patent/US12764778B2 ## CPC - H04W 74/002: {Transmission of channel access control information} - H04L 1/1822: involving configuration of automatic repeat request [ARQ] with parallel processes - H04W 72/02: Selection of wireless resources by user or terminal - H04W 74/0833: Random access procedures, e.g. with 4-step access - H04L 1/1812: Hybrid protocols; Hybrid automatic repeat request [HARQ] - 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 A communication device operating in a communications network can determine to transmit information using repetition to a network node operating in the communications network during a random access, RA, procedure. The communication device can further determine a subset of preambles based on determining to transmit the information using repetition. Responsive to determining the subset of preambles, the communication device can determine a preamble of the subset of preambles to transmit to the network node to indicate a type of the repetition. The communication device can further transmit the preamble to the network node. The communication device can further transmit the information using the type of repetition to the network node. ## Claims ### Claim 1 A method of operating a communication device in a communications network, the method comprising: determining, by the communication device, to transmit Msg3 information using repetition to a network node operating in the communications network during a random access, RA, procedure; determining to use a subset of preambles that are reserved for Msg3 repetition based on determining to transmit the Msg3 information using repetition; determining a preamble of the subset of preambles that are reserved for Msg3 repetition; transmitting the preamble to the network node; and transmitting the Msg3 information using repetition to the network node. ### Claim 2 (depends on 1) The method of claim 1, wherein determining to transmit the Msg3 information using repetition to the network node comprises: measuring a characteristic of a reference signal received from the network node; and determining to transmit the information to the network node using repetition based on the characteristic. ### Claim 3 (depends on 2) The method of claim 2, wherein the characteristic comprises at least one of a signal to noise ratio or a signal level. ### Claim 4 (depends on 1) The method of claim 1, wherein transmitting the Msg3 information using repetition comprises: receiving a repetition factor in downlink control information, DCI, with cyclic redundancy check, CRC, scrambled by a temporary cell radio network temporary identifier, TC-RNTI; and transmitting the Msg3 information to the network node a number of times based on the repetition factor. ### Claim 5 (depends on 1) The method of claim 1, wherein transmitting the Msg3 information comprises transmitting the Msg3 information via a physical uplink shared channel, PUSCH. ### Claim 6 (depends on 1) The method of claim 1, wherein transmitting the Msg3 information comprises transmitting a plurality of transmissions to the network node, each transmission of the plurality transmissions conveying a same set of information bits. ### Claim 7 (depends on 6) The method of claim 6, wherein determining to transmit the Msg3 information using repetition further comprises determining to transmit the Msg3 information using repetition and frequency hopping, wherein transmitting the Msg3 information using frequency hopping comprises transmitting a first transmission and a second transmission using different frequency resources, wherein the plurality of transmissions includes the first transmission and the second transmission, and wherein transmitting the first transmission and the second transmission using different frequency resources comprises transmitting a first transmission of the plurality of transmissions using first frequency resources and transmitting a second transmission of the plurality of transmissions using second frequency resources that are different than the first frequency resources. ### Claim 8 (depends on 7) The method of claim 7, wherein transmitting the first transmission and the second transmission using different frequency resources further comprises: determining that the first transmission and the second transmission share a hybrid automatic repeat request, HARQ, redundancy version; and determining to transmit the first transmission and the second transmission using different frequency resources based on determining that the first transmission and the second transmission share the HARQ redundancy version. ### Claim 9 (depends on 7) The method of claim 7, wherein the plurality of transmissions is a first plurality of transmissions including the first transmission, wherein the set of information bits is a first set of information bits, and wherein transmitting a first transmission and a second transmission using different frequency resources comprises transmitting each transmission of the first plurality of transmissions using a first frequency and transmitting each transmission of a second plurality of transmissions that includes the second transmission using a second frequency that is different than the first frequency, each transmission of the second plurality of transmissions conveying a same second set of information bits that are different than the first set of information bits. ### Claim 10 (depends on 7) The method of claim 7, further comprising: receiving system information indicating a number of transmissions in the plurality of transmissions and instructions on when to change a frequency used to transmit the plurality of transmissions. ### Claim 11 (depends on 7) The method of claim 7, wherein determining to transmit the Msg3 information comprises determining to transmit the Msg3 information based on a single indicator received in a random access response, RAR, wherein the single indicator comprises an indication of a number of transmissions in the plurality of transmissions, wherein determining to transmit the Msg3 information using repetition and frequency hopping comprises: determining that the number of transmissions is greater than one based on the bit; and determining to transmit the Msg3 information using repetition and frequency hopping based on the number being greater than one. ### Claim 12 (depends on 1) The method of claim 1, further comprising: responsive to transmitting a portion of the Msg3 information using repetition, receiving an indication from the network node indicating to terminate repetition. ### Claim 13 A method of operating a network node in a communications network, the method comprising: receiving a preamble from a communication device during a random access, RA, procedure; determining whether the communication device will transmit Msg3 information using repetition based on a subset of preambles associated with the preamble received from the communication device during the RA procedure, wherein the determining determines whether the preamble received from the communication device is one of the preambles in the subset of preambles that are reserved for Msg3 repetition; and receiving the Msg3 information from the communication device. ### Claim 14 (depends on 13) The method of claim 13, further comprising: transmitting a repetition factor in downlink control information, DCI, with cyclic redundancy check, CRC, scrambled by a temporary cell radio network temporary identifier, TC-RNTI, wherein a number of times the msg3 information is received from the communication device is based on the repetition factor. ### Claim 15 (depends on 13) The method of claim 13, further comprising: transmitting a reference signal for the communication device to use as a basis for determining whether to transmit the Msg3 information to the network node using repetition. ### Claim 16 A communication device for operating in a communications network, the communication device comprising: processing circuitry; and memory containing instructions that, when executed by the processing circuitry, cause the apparatus to: determine to transmit Msg3 information using repetition to a network node operating in the communications network during a random access, RA, procedure; determine to use a subset of preambles that are reserved for Msg3 repetition based on determining to transmit the Msg3 information using repetition; determine a preamble of the subset of preambles that are reserved for Msg3 repetition; transmit the preamble to the network node; and transmit the Msg3 information using repetition to the network node. ### Claim 17 (depends on 16) The communication device of claim 16, wherein when the instructions cause the apparatus to determine to transmit the Msg3 information using repetition to the network node, the instructions further cause the apparatus to: measure a characteristic of a reference signal received from the network node; and determine to transmit the Msg3 information to the network node using repetition based on the characteristic. ### Claim 18 (depends on 17) The communication device of claim 17, wherein the characteristic comprises at least one of a signal to noise ratio or a signal level. ### Claim 19 (depends on 16) The communication device of claim 16, wherein when the instructions cause the apparatus to transmit the Msg3 information using repetition, the instructions further cause the apparatus to: receive a repetition factor in downlink control information, DCI, with cyclic redundancy check, CRC, scrambled by a temporary cell radio network temporary identifier, TC-RNTI; and transmit the Msg3 information to the network node a number of times based on the repetition factor. ### Claim 20 A network node for operating in a communications network, the communication device comprising: processing circuitry; and memory containing instructions that, when executed by the processing circuitry, cause the apparatus to: receive a preamble from a communication device during a random access, RA, procedure; determine whether the communication device will transmit Msg3 information using repetition based on a subset of preambles associated with the preamble received from the communication device during the RA procedure, wherein the determining determines whether the preamble received from the communication device is one of the preambles in the subset of preambles that are reserved for Msg3 repetition; and receive the Msg3 information from the communication device. ### Claim 21 (depends on 20) The network node of claim 20, wherein the instructions further cause the apparatus to: transmit a repetition factor in downlink control information, DCI, with cyclic redundancy check, CRC, scrambled by a temporary cell radio network temporary identifier, TC-RNTI, wherein a number of times the msg3 information is received from the communication device is based on the repetition factor. ### Claim 22 (depends on 20) The network node of claim 20, wherein the instructions further cause the apparatus to: transmit a reference signal for the communication device to use as a basis for determining whether to transmit the Msg3 information to the network node using repetition.