# US 12,184,460 B2 · Numerology-dependent downlink control channel mapping > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,184,460 B2 - Document ID: US12184460B2 - Status: Granted - Kind: B2 - Application number: 17/948,515 - Filed: 2022-09-20 - Published: 2023-02-23 - Granted: 2024-12-31 - Earliest claimed: 2016-11-17 - Assignees: Telefonaktiebolaget LM Ericsson (publ) - Applicants: Telefonaktiebolaget LM Ericsson (publ) - Inventors: Stefan Parkvall; Robert Baldemair - Web page: https://patentgrep.com/patent/US12184460B2 ## CPC - H04L 27/2602: {Signal structure} - H04L 5/0023: {Time-frequency-space} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 5/0064: {Rate requirement of the data, e.g. scalable bandwidth, data priority} - H04L 5/0092: {Indication of how the channel is divided} - H04L 27/26025: {Numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking (allocating sub-channels of the transmission path H04L5/003)} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A user equipment performs a method comprising: receiving (S110) system information indicating a current numerology of a control region with configurable numerology; and decoding (S120) the control region in accordance with an assumption of a channel mapping which is selected from at least two predefined channel mappings on the basis of the current numerology. A base station performs a method comprising: transmitting (S210) system information indicating a current numerology of a control region with configurable numerology; generating (S220) a signal using a channel mapping selected from at least two predefined channel mappings; and transmitting (S230) the generated signal in the control region, wherein the channel mapping is selected on the basis of the current numerology of the control region or vice versa. ## Claims ### Claim 1 A method implemented in a user equipment, UE, comprising: receiving system information indicating a current numerology of a control region with configurable numerology; and decoding the control region in accordance with a channel mapping which is selected from channel mappings on the basis of the current numerology. ### Claim 2 (depends on 1) The method of claim 1, further comprising comparing a numerology of a data region and said current numerology of the control region, wherein the channel mapping is selected on the basis of an outcome of the comparison. ### Claim 3 (depends on 2) The method of claim 2, further comprising receiving an indication of the numerology of the data region. ### Claim 4 (depends on 3) The method of claim 3, wherein the comparison pertains to numerologies of a data region and a control region of a same slot. ### Claim 5 (depends on 4) The method of claim 4, wherein the system information is received on a broadcast channel. ### Claim 6 (depends on 5) The method of claim 5, wherein: the control region comprises a common portion and a UE-specific portion, wherein a numerology of one of the portions is configurable independently of a numerology of the other one of the portions; and said comparison pertains to numerologies of the data region and a common portion of the control region. ### Claim 7 (depends on 6) The method of claim 6, wherein the channel mappings include multi-symbol mapping and per-symbol mapping. ### Claim 8 (depends on 7) The method of claim 7, wherein multi-symbol mapping is selected in the absence of a comparison of a numerology of a data region and the current numerology of the control region. ### Claim 9 (depends on 7) The method of claim 7, wherein per-symbol mapping is selected if the numerology of the data region and the current numerology of the control region are different. ### Claim 10 (depends on 9) The method of claim 9, wherein per-symbol mapping is selected if the current numerology of the control region prescribes a greater subcarrier spacing than the numerology of the data region. ### Claim 11 (depends on 10) The method of claim 10, wherein multi-symbol mapping is selected if the numerology of the data region and the current numerology of the control region are equal or equivalent. ### Claim 12 (depends on 11) The method of claim 11, wherein per-symbol mapping entails that each physical downlink control channel, PDCCH, is contained in one OFDM symbol. ### Claim 13 (depends on 12) The method of claim 12, wherein multi-symbol mapping entails that a physical downlink control channel, PDCCH, may exceed one OFDM symbol. ### Claim 14 A method implemented in a base station, BS, comprising: transmitting system information indicating a current numerology of a control region with configurable numerology; generating a signal using a channel mapping selected from channel mappings; and transmitting the generated signal in the control region, wherein the channel mapping is selected on the basis of the current numerology of the control region or vice versa. ### Claim 15 (depends on 14) The method of claim 14, further comprising transmitting an indication of a numerology of a data region. ### Claim 16 (depends on 15) The method of claim 15, wherein the system information is transmitted on a broadcast channel. ### Claim 17 (depends on 16) The method of claim 16, wherein the channel mappings include multi-symbol mapping and per-symbol mapping. ### Claim 18 (depends on 17) The method of claim 17, wherein multi-symbol mapping is selected in instances for which the BS does not transmit an indication of a numerology of a data region. ### Claim 19 (depends on 17) The method of claim 17, wherein per-symbol mapping is selected if a numerology of a data region and the current numerology of the control region are different. ### Claim 20 (depends on 19) The method of claim 19, wherein per-symbol mapping is selected if the current numerology of the control region prescribes a greater subcarrier spacing than the numerology of the data region. ### Claim 21 (depends on 20) The method of claim 20, wherein multi-symbol mapping is selected if a numerology of a data region and the current numerology of the control region are equal or equivalent. ### Claim 22 (depends on 21) The method of claim 21, wherein per-symbol mapping entails that each physical downlink control channel, PDCCH, is contained in one OFDM symbol. ### Claim 23 (depends on 22) The method of claim 22, wherein multi-symbol mapping entails that a physical downlink control channel, PDCCH, may exceed one OFDM symbol. ### Claim 24 A user equipment comprising: a processor; a communication interface; and a computer program product storing instructions that, when executed by the processor, cause the UE to: receive system information indicating a current numerology of a control region with configurable numerology; and decode the control region in accordance with a channel mapping which is selected channel mappings on the basis of the current numerology. ### Claim 25 A base station comprising: a processor; a communication interface; and a computer program product storing instructions that, when executed by the processor, cause the BS to: transmit system information indicating a current numerology of a control region with configurable numerology; generate a signal using a channel mapping selected from channel mappings; and transmit the generated signal in the control region, wherein the channel mapping is selected on the basis of the current numerology of the control region or vice versa.