# US 12,004,220 B2 · Transmission and access with multiple transmission reception points > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,004,220 B2 - Document ID: US12004220B2 - Status: Granted - Kind: B2 - Application number: 17/318,485 - Filed: 2021-05-12 - Published: 2021-11-18 - Granted: 2024-06-04 - Earliest claimed: 2020-05-13 - Assignees: Ofinno, LLC - Applicants: Ofinno, LLC - Inventors: Kai Xu; Esmael Hejazi Dinan; Hua Zhou; Yunjung Yi; Ali Cagatay Cirik; Jonghyun Park - Web page: https://patentgrep.com/patent/US12004220B2 ## CPC - H04B 17/327: Received signal code power [RSCP] - H04B 7/0426: Power distribution - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04W 52/36: with a discrete range or set of values, e.g. step size, ramping or offsets - H04W 52/50: at the moment of starting communication in a multiple access environment - H04W 56/00: Synchronisation arrangements - H04W 74/006: {in the downlink, i.e. towards the terminal} - H04W 74/0833: Random access procedures, e.g. with 4-step access - H04B 7/024: Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04L 5/001: {the frequencies being arranged in component carriers} - H04L 5/0023: {Time-frequency-space} - H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - H04L 5/0062: {Avoidance of ingress interference, e.g. ham radio channels} - H04W 52/40: during macro-diversity or soft handoff - H04W 74/0836: with 2-step access - H04W 74/0838: using contention-free random access [CFRA] - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract In an embodiment a wireless device receives configuration parameters, of a cell, indicating: a first reference signal (RS) of a first transmission reception point (TRP) of the cell; a second RS of a second TRP of the cell; random access channel (RACH) resources of a RACH of the cell; and a power offset value. The wireless device measures a first received power value of the first RS and measures a second received power value of the second RS. The wireless device selects, based on the measuring and the power offset value, an RS from the first RS and the second RS. Then, the wireless device transmits a preamble, associated with the selected RS, via the RACH resources. ## Claims ### Claim 1 A method comprising: receiving, by a wireless device, configuration parameters, of a cell, indicating: a first reference signal (RS) of a first transmission reception point (TRP) of the cell; a second RS of a second TRP of the cell; random access channel (RACH) resources of a RACH of the cell; and a power offset value for the first TRP; measuring: a first received power value of the first RS; and a second received power value of the second RS; selecting, after adjusting the first received power value by the power offset value, an RS from the first RS and the second RS; and transmitting a preamble, to a TRP that is associated with the RS from the first TRP and the second TRP, via the RACH resources. ### Claim 2 (depends on 1) The method of claim 1, wherein the configuration parameters further indicate: a first RS group associated with the first TRP and comprising the first RS; a second RS group associated with the second TRP and comprising the second RS; and an association between the preamble and the RS. ### Claim 3 (depends on 2) The method of claim 2, further comprising applying the power offset value to RSs in the first RS group, and selecting the RS from the RSs in the first RS group and the second RS group. ### Claim 4 (depends on 1) The method of claim 1, further comprising determining a transmission power for the preamble based on the RS, wherein the preamble is transmitted based on the transmission power. ### Claim 5 (depends on 1) The method of claim 1, wherein the first received power value comprises a first RS received power (RSRP) value and the second received power value comprises a second RSRP value. ### Claim 6 (depends on 1) The method of claim 1, wherein the selecting the RS, after adjusting the first received power value by the power offset value, comprises applying the power offset value to the first received power value of the first RS. ### Claim 7 (depends on 6) The method of claim 6, wherein the applying the power offset value to the first received power value comprises adding or deducting the power offset value from the first received power value of the first RS. ### Claim 8 (depends on 1) The method of claim 1, wherein the selecting the RS from the first RS and the second RS comprises selecting the first RS based on the first received power value being higher than the second received power value of the second RS. ### Claim 9 (depends on 1) The method of claim 1, wherein the RACH resources comprise time domain resources and frequency domain resources of a RACH occasion. ### Claim 10 (depends on 1) The method of claim 1, wherein: the first RS is selected as the RS in response to the first received power value being higher than the second received power value of the second RS after the adjusting; and the second RS is selected as the RS in response to the second received power value being higher than the first received power value of the first RS after the adjusting. ### Claim 11 A wireless device comprising: one or more processors; and memory storing instructions that, when executed by the one or more processors, cause the wireless device: receive configuration parameters, of a cell, indicating: a first reference signal (RS) of a first transmission reception point (TRP) of the cell; a second RS of a second TRP of the cell; random access channel (RACH) resources of a RACH of the cell; and a power offset value for the first TRP; measure: a first received power value of the first RS; and a second received power value of the second RS; select, after adjusting the first received power value by the power offset value, an RS from the first RS and the second RS; and transmit a preamble, to a TRP associated with the RS from among the first TRP and the second TRP, via the RACH resources. ### Claim 12 (depends on 11) The wireless device of claim 11, wherein the configuration parameters further indicate: a first RS group associated with the first TRP and comprising the first RS; a second RS group associated with the second TRP and comprising the second RS; and an association between the preamble and the RS. ### Claim 13 (depends on 12) The wireless device of claim 12, wherein the instructions further cause the wireless device to apply the power offset value to RSs in the first RS group, and select the RS from RSs in the first RS group and the second RS group. ### Claim 14 (depends on 11) The wireless device of claim 11, wherein the instructions further cause the wireless device to determine a transmission power for the preamble based on the RS, wherein the preamble is transmitted based on the transmission power. ### Claim 15 (depends on 11) The wireless device of claim 11, wherein the first received power value comprises a first RS received power (RSRP) value and the second received power value comprises a second RSRP value. ### Claim 16 (depends on 11) The wireless device of claim 11, wherein to select the RS, after adjusting the first received power value by the power offset value, the instructions further cause the wireless device to apply the power offset value to the first received power value of the first RS. ### Claim 17 (depends on 16) The wireless device of claim 16, wherein to apply the power offset value to the first received power value, the instructions further cause the wireless device to add or deduct the power offset value from the first received power value of the first RS. ### Claim 18 (depends on 11) The wireless device of claim 11, wherein to select the RS from the first RS and the second RS, the instructions further cause the wireless device to select the first RS based on the first received power value being higher than the second received power value of the second RS. ### Claim 19 (depends on 11) The wireless device of claim 11, wherein: the first RS is selected as the RS in response to the first received power value being higher than the second received power value of the second RS after the adjusting; and the second RS is selected as the RS in response to the second received power value being higher than the first received power value of the first RS after the adjusting. ### Claim 20 A system comprising: a base station comprising: one or more first processors; and first memory storing first instructions that, when executed by the one or more first processors, cause the base station to: transmit configuration parameters of a cell, the configurations parameters indicating: a first reference signal (RS) of a first transmission reception point (TRP) of the cell; a second RS of a second TRP of the cell; random access channel (RACH) resources of a RACH of the cell; and a power offset value for the first TRP; and a wireless device comprising: one or more second processors; and second memory storing second instructions that, when executed by the one or more second processors, cause the wireless device to: receive, from the base station, the configuration parameters; measure: a first received power value of the first RS; and a second received power value of the second RS; select, after adjusting the first received power value by the power offset value, an RS from the first RS and the second RS; and transmit a preamble, to a TRP of the base station associated with the RS from the first TRP and the second TRP, via the RACH resources.