# US 2020/0288505 A1 · Random access in a telecommunication system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0288505 A1 - Document ID: US20200288505A1 - Status: Published application - Kind: A1 - Application number: 16/790,468 - Filed: 2020-02-13 - Published: 2020-09-10 - Earliest claimed: 2019-02-13 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Galini TSOUKANERI; Yue WANG; Shangbin WU - Web page: https://patentgrep.com/patent/US20200288505A1 ## CPC - H04W 76/10: Connection setup - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04W 74/0833: Random access procedures, e.g. with 4-step access - H04W 74/0841: {with collision treatment} - H04L 5/003: {Arrangements for allocating sub-channels of the transmission path} - H04L 5/04: the signals being represented by different amplitudes or polarities, e.g. quadriplex - 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 Random Access method in a telecommunication system, includes the steps of: receiving two or more identical preambles transmitted from two or more User Equipments (UEs), respectively; determining a minimum difference between the two or more identical preambles in a given domain; transmitting a response message to each of the two or more UEs; and receiving a connection setup message using information included in the respective response messages transmitted to each of the two or more UEs. ## Claims ### Claim 1 A method for random access in a telecommunication system by a base station, the method comprising: receiving two or more identical preambles transmitted from two or more User Equipments (UEs), respectively; determining a minimum difference between the two or more identical preambles in a given domain; transmitting a response message to each of the two or more UEs; and receiving a connection setup message using information included in the respective response messages transmitted to each of the two or more UEs. ### Claim 2 (depends on 1) The method of claim 1, further comprising: continuously updating the minimum difference based on the determined minimum difference by the base station. ### Claim 3 (depends on 1) The method of claim 1, wherein the given domain is at least one of time, power, frequency, or code. ### Claim 4 (depends on 1) The method of claim 1, wherein the determined minimum difference is used to define a plurality of logical zones within a coverage area of a cell of the telecommunication system. ### Claim 5 (depends on 4) The method of claim 4, wherein the plurality of logical zones are defined such that preambles from one of the plurality of logical zones in the cell coverage area are reused in another of the plurality of logical zones in the cell coverage area. ### Claim 6 (depends on 4) The method of claim 4, wherein the plurality of logical zones are defined based on a Non Orthogonal Multiple Access (NOMA) or scheme utilizing Successive Interference Cancellation (SIC). ### Claim 7 (depends on 1) The method of claim 1, further comprising transmitting a preamble usage report periodically, wherein a preamble to transmit is selected by each of the two or more UEs based on the preamble usage report. ### Claim 8 (depends on 7) The method of claim 7, wherein the preamble usage report is transmitted in a System Information Block (SIB). ### Claim 9 (depends on 7) The method of claim 7, wherein the preamble usage report is determined based on a number of times that a given preamble has been used in an observing time window. ### Claim 10 (depends on 9) The method of claim 9, wherein a duration of the observing time window is adjusted dynamically based on a reinforcement learning algorithm. ### Claim 11 A method of preamble selection in a random access process in a telecommunication system by a base station, comprising: defining an observing window including a duration of a number of frames; recording preamble usage within the observing window; preparing a preamble usage report comprising information regarding a number of times each possible preamble is used within the observing window; and transmitting the preamble usage report, wherein a preamble is selected by a user equipment (UE) based on a selected random number and the preamble usage report. ### Claim 12 (depends on 11) The method of claim 11, wherein the duration of the observing window is dynamically updated by means of a reinforcement learning algorithm. ### Claim 13 A base station for random access in a telecommunication system, the base station comprising: a transceiver; a processor; and a memory configured to store instructions that, when executed by the processor, cause the processor to: control the transceiver to receive two or more identical preambles transmitted from two or more User Equipments (UEs), respectively; determine a minimum difference between the two or more identical preambles in a given domain; control the transceiver to transmit a response message to each of the two or more UEs; and control the transceiver to receive a connection setup message using information included in the respective response messages transmitted to each of the two or more UEs. ### Claim 14 (depends on 13) The base station of claim 13, wherein the memory further stores instructions that, when executed by the processor, further cause the processor to continuously update the minimum difference based on the determined minimum difference. ### Claim 15 (depends on 13) The base station of claim 13, wherein the given domain is at least one of time, power, frequency, or code. ### Claim 16 (depends on 13) The base station of claim 13, wherein the determined minimum difference is used to define a plurality of logical zones within a coverage area of a cell of the telecommunication system. ### Claim 17 (depends on 16) The base station of claim 16, wherein the plurality of logical zones are defined such that preambles from one of the plurality of logical zones in the cell coverage area are reused in another of the plurality of logical zones in the cell coverage area. ### Claim 18 (depends on 16) The base station of claim 16, wherein the plurality of logical zones are defined based on a Non Orthogonal Multiple Access (NOMA) or scheme utilizing Successive Interference Cancellation (SIC). ### Claim 19 (depends on 13) The base station of claim 13, wherein the memory further stores instructions that, when executed by the processor, further cause the processor to control the transceiver to transmit a preamble usage report periodically, wherein a preamble to transmit is selected by each of the two or more UEs based on the preamble usage report. ### Claim 20 (depends on 19) The base station of claim 19, wherein the preamble usage report is transmitted in a System Information Block (SIB).