# US 11,451,364 B2 · Method and apparatus for applying uplink 7.5 kHz frequency shifting when LTE cell and NR cell coexist in TDD band in next generation mobile communication system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,451,364 B2 - Document ID: US11451364B2 - Status: Granted - Kind: B2 - Application number: 16/832,880 - Filed: 2020-03-27 - Published: 2020-10-01 - Granted: 2022-09-20 - Earliest claimed: 2019-03-28 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Seungri Jin; Soenghun Kim; Suyoung Park - Web page: https://patentgrep.com/patent/US11451364B2 ## CPC - H04L 5/1469: {using time-sharing} - H04W 48/12: using downlink control channel - H04W 8/24: Transfer of terminal data - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04W 76/27: Transitions between radio resource control [RRC] states - H04W 48/02: Access restriction performed under specific conditions - H04W 48/16: Discovering, processing access restriction or access information - 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 A communication scheme and a system therefor, which combines an IoT technology and a 5th generation (5G) communication system for supporting a higher data transmission rate than a 4th generation (4G) system is provided. The disclosure may be applied to a smart service (e.g., a smart home, a smart building, a smart city, a smart car or connected car, healthcare, digital education, retail business, a security and safety related service, or the like) based on the 5G communication technology and the IoT related technology. The disclosure provides a method of supporting an uplink transmission method for a user equipment (UE) when different systems coexist in a next generation mobile communication system. ## Claims ### Claim 1 A method performed by a base station in a wireless communication system, the method comprising: identifying a predetermined band; determining whether the predetermined band is a certain time division duplex (TDD) band among a plurality of new radio (NR) operating band supporting TDD and requires a 7.5 kHz frequency shifting for an uplink transmission; in case that the predetermined band is the certain TDD band and requires the 7.5 kHz frequency shifting, generating an indicator for the 7.5 kHz frequency shifting which indicates that the 7.5 kHz frequency shifting is enabled for the uplink transmission in the certain TDD band; and transmitting, to a user equipment (UE), a first system information message including the indicator. ### Claim 2 (depends on 1) The method of claim 1, further comprising: if the predetermined band does not require the 7.5 kHz frequency shifting, transmitting a second system information message to the UE without an indicator for the 7.5 kHz frequency shifting. ### Claim 3 (depends on 1) The method of claim 1, further comprising: receiving, from the UE, an uplink signal to which the 7.5 kHz frequency shifting is applied. ### Claim 4 (depends on 1) The method of claim 1, further comprising: determining whether the predetermined band corresponds to at least one of a frequency division duplex (FDD) band or a supplementary uplink (SUL) band, and requires the 7.5 kHz frequency shifting for the uplink transmission; in case that the predetermined band corresponds to the at least one of the FDD band or the SUL band, and requires the 7.5 kHz frequency shifting for the uplink transmission, generating the indicator for the 7.5 kHz frequency shifting; and transmitting, to the UE, a third system information message including the indicator. ### Claim 5 A method performed by a user equipment (UE) in a wireless communication system, the method comprising: receiving, from a base station, system information including an indicator indicating whether a 7.5 kHz frequency shifting is enabled for a certain time division duplex (TDD) band among a plurality of new radio (NR) operating bands supporting TDD; identifying whether a frequency band for an uplink transmission is the certain TDD band, based on the system information; and transmitting, to the base station, an uplink signal in the frequency band by applying the 7.5 kHz frequency shifting, in case that the frequency band is the certain TDD band and the 7.5 kHz frequency shifting is enabled for the certain TDD band based on the indicator. ### Claim 6 (depends on 5) The method of claim 5, wherein in case that the indicator is configured as ‘true’, the 7.5 kHz frequency shifting is enabled for the uplink transmission in the certain TDD band. ### Claim 7 (depends on 5) The method of claim 5, wherein the uplink signal, to which the 7.5 kHz frequency shifting is applied, is a random access request signal. ### Claim 8 (depends on 5) The method of claim 5, further comprising: transmitting, to the base station, a UE capability to support the 7.5 kHz frequency shifting for the certain TDD band. ### Claim 9 (depends on 5) The method of claim 5, further comprising: transmitting, to the base station, the uplink signal, to which the 7.5 kHz frequency shifting is applied, in case that the frequency band corresponds to at least one of a frequency division duplex (FDD) band or a supplementary uplink (SUL) band. ### Claim 10 A base station in a wireless communication system, the base station comprising: a transceiver configured to perform signal transmission or reception with a base station or a user equipment (UE); and a processor configured to control: identify a predetermined band, determine whether the predetermined band is a certain time division duplex (TDD) band among a plurality of new radio (NR) operating bands supporting TDD and requires a 7.5 kHz frequency shifting for an uplink transmission, in case that the predetermined band is the certain TDD band and requires the 7.5 kHz frequency shifting for the uplink transmission, generate an indicator for the 7.5 kHz frequency shifting which indicates that the 7.5 kHz frequency shifting is enabled for the uplink transmission in the certain TDD band, and transmit, to the UE, a first system information message including the indicator. ### Claim 11 (depends on 10) The base station of claim 10, wherein the processor is further configured to control to, if the predetermined band does not require the 7.5 kHz frequency shifting, transmit, to the UE, a second system information message without an indicator for the 7.5 kHz frequency shifting. ### Claim 12 (depends on 10) The base station of claim 10, wherein the processor is further configured to control to receive an uplink signal, to which the 7.5 kHz frequency shifting is applied, from the UE. ### Claim 13 (depends on 10) The base station of claim 10, wherein the processor is further configured to control to: determine whether the predetermined band corresponds to at least one of a frequency division duplex (FDD) band or a supplementary uplink (SUL) band, and requires the 7.5 kHz frequency shifting for an uplink transmission, in case that the predetermined band corresponds to the at least one of the FDD band or the SUL band, and requires the 7.5 kHz frequency shifting for the uplink transmission, generate the indicator for the 7.5 kHz frequency shifting, and transmit, to the UE, a third system information message including the indicator. ### Claim 14 A user equipment (UE) in a wireless communication system, the UE comprising: a transceiver configured to perform signal transmission or reception with a base station; and a processor configured to: receive, from the base station, system information including an indicator indicating whether a 7.5 kHz frequency shifting is enabled for a certain time division duplex (TDD) band among a plurality of new radio (NR) operating bands supporting TDD, identify whether a frequency band for an uplink transmission is the certain TDD band, based on the system information, and transmit, to the base station, an uplink signal in the frequency band by applying the 7.5 kHz frequency shifting, in case that the frequency band is the certain TDD band and the 7.5 kHz frequency shifting is enabled for the certain TDD band based on the indicator. ### Claim 15 (depends on 14) The UE of claim 14, wherein in case that the indicator is configured as ‘true’, the 7.5 kHz frequency shifting is enabled for the uplink transmission in the certain TDD band. ### Claim 16 (depends on 14) The UE of claim 14, wherein the uplink signal, to which the 7.5 kHz frequency shifting is applied, is a random access request signal. ### Claim 17 (depends on 14) The UE of claim 14, wherein the processor is further configured to transmit, to the base station, a UE capability to support the 7.5 kHz frequency shifting for the certain TDD band. ### Claim 18 (depends on 14) The UE of claim 14, wherein the processor is further configured to transmit, to the base station, the uplink signal, to which the 7.5 kHz frequency shifting is applied, in case that the frequency band corresponds to at least one of a frequency division duplex (FDD) band or a supplementary uplink (SUL) band.