User equipment, base station, method performed by user equipment, and method performed by a base station.

Abstract

The present invention relates to providing a base station, which includes: a configuration unit, configured to configure any one or more of a carrier center frequency, a carrier frequency position, and a sub-band frequency position; and a transmission unit, configured to transmit a synchronization signal at a candidate frequency position and to transmit information configured by the configuration unit. The configuration unit performs the configuration using any one or more of the following: a master information block (MIB), a system information block (SIB), and dedicated radio resource control (RRC) signaling. The present application further provides user equipment (UE) and a corresponding method.

Description

1 / 56 User equipment, base station, method performed by user equipment, and method performed by a base station. TECHNICAL FIELD

[0001] The present invention relates to the technical field of wireless communications. More specifically, the present application relates to a method, a base station, and user equipment for indicating the frequency position of a synchronization signal, a carrier, and a sub-band. BACKGROUND OF THE INVENTION

[0002] A new research project on 5G technical standards (see non-patent literature: RP 160671: New SID Proposal: Study on New Radio Access Technology) was proposed by NTT DOCOMO at the plenary session of the 3GPP Partnership Project RAN#71 in March 2016, and was approved. The objective of the research project is to develop a New Radio (NR) radio access technology to meet all application scenarios, requirements, and deployment environments of 5G. The NR technology has mainly three application scenarios: Enhanced Mobile Broadband Communication (eMBB), Massive Machine-to-Communication (mMTC), and Ultra Reliable Low Latency Communication (URLLC). According to the research project plan, the standardization of NR is carried out in two stages: the first stage of standardization will be completed by mid-2018; The second stage of standardization will be completed by the end of 2019.The standard specifications for the first stage must be compatible with later versions of the standard specifications for the second stage, while the standard specifications for the second stage must be established based on the standard specifications for the first stage and meet all the requirements of the NR 5G technical standards. Petition 870250009687, dated 06 / 02 / 2025, page 7 / 130 2 / 56

[0003] At the 3GPP RAN1#87 meeting held in Reno, USA in November 2016, the following consensus was reached: the frequency raster of an NR synchronization signal may depend on a carrier frequency band and, at least in the case where the carrier frequency is greater than 6 GHz, the frequency raster of a synchronization signal may be greater than the 100 kHz LTE channel raster. Furthermore, for an NR cell, the center frequency of its synchronization signal may be different from the center frequency of an NR carrier. SUMMARY OF THE INVENTION

[0004] The present application mainly solves the problem of how to determine or indicate a frequency position of an NR synchronization signal, a carrier, and a sub-band.

[0005] According to one aspect of the present application, a base station is provided comprising: a configuration unit configured to configure any one or more of a carrier center frequency, a carrier frequency position, and a sub-band frequency position; and a transmit unit, configured to transmit a synchronization signal at a candidate frequency position and to transmit information configured by the configuration unit. The configuration unit performs the configuration using any one or more of the following: a master information block (MIB), a system information block (SIB), and dedicated radio resource control (RRC) signaling.

[0006] In one embodiment, the configuration unit is configured to determine the candidate frequency position according to a grid of a specific size and a reference spacing between subcarriers, wherein the reference spacing between subcarriers depends on a carrier frequency band.

[0007] In one embodiment, the configuration unit is configured Petition 870250009687, dated 06 / 02 / 2025, page 8 / 130 3 / 56 to indicate the central carrier frequency through a physical resource block shift (PRB).

[0008] In one embodiment, the configuration unit is configured to indicate the carrier frequency position via an indicator, a physical resource block offset (PRB), and a carrier bandwidth.

[0009] In one embodiment, the configuration unit is configured to indicate the carrier frequency position through a physical resource block offset (PRB) and a carrier bandwidth.

[0010] In one embodiment, the configuration unit is configured to indicate a frequency position of a given sub-band on a carrier through an indicator, a physical resource block offset (PRB), and a sub-band length.

[0011] In one embodiment, the configuration unit is set to indicate a frequency position of a given sub-band on a carrier through, a physical resource block (PRB) offset, an initial PRB index, and a sub-band length.

[0012] In one embodiment, the configuration unit is configured to define the PRB based on a standard spacing between subcarriers or a reference spacing between subcarriers.

[0013] In one embodiment, the configuration unit is configured to: configure, using a MIB, a parameter to indicate a central carrier frequency and / or a parameter to indicate a carrier frequency position; configure, using a SIB, a parameter to indicate a frequency position of a sub-band where a common search space is located; and configure, using dedicated RRC signaling, a parameter to indicate a frequency position of a sub-band where a search space Petition 870250009687, dated 06 / 02 / 2025, page 9 / 130 4 / 56 specific to the EU (user equipment) is located.

[0014] According to another aspect of the present application, a method is provided that is performed by a base station, which includes: setting up any one or more of a center carrier frequency, a carrier frequency position and a sub-band frequency position; and transmitting a synchronization signal on a candidate frequency position and transmitting information configured by the configuration unit. The configuration is performed using any one or more of the following: a master information block (MIB), a system information block (SIB), and dedicated radio resource control (RRC) signaling.

[0015] In one embodiment, the candidate frequency position is determined according to a grid of a specific size and a reference spacing between subcarriers, wherein the reference spacing between subcarriers depends on a carrier frequency band.

[0016] In one embodiment, the central carrier frequency is indicated by means of an indicator and a physical resource block offset (PRB).

[0017] In one embodiment, the carrier frequency position is indicated by an indicator, a physical resource block offset (PRB), and a carrier bandwidth.

[0018] In one embodiment, the carrier frequency position is indicated by a physical resource block offset (PRB) and a carrier bandwidth.

[0019] In one embodiment, a frequency position of a given sub-band on a carrier is indicated by an indicator, a physical resource block offset (PRB), and a sub-band length.

[0020] In a modality, a frequency position of a Petition 870250009687, dated 06 / 02 / 2025, page 10 / 130 5 / 56 A given sub-band on a carrier is indicated by a physical feature block offset (PRB), an initial PRB index, and a sub-band length.

[0021] In one embodiment, the PRB is defined based on a standard spacing between subcarriers or a reference spacing between subcarriers.

[0022] In one embodiment, a parameter to indicate a central carrier frequency and / or a parameter to indicate a carrier frequency position is configured using a MIB; a parameter to indicate a frequency position of a sub-band, where a common search space is located, is configured using a SIB; and a parameter to indicate a frequency position of a sub-band, where a user equipment-specific search space - UE is located, is configured using dedicated RRC signaling.

[0023] According to another aspect of the present application, user equipment (UE) is provided comprising: a receiving unit, configured to receive a synchronization signal from a candidate frequency position and to receive configuration information; and an extraction unit, configured to extract any one or more of a carrier center frequency, a carrier frequency position and a sub-band frequency position, according to the configuration information. The configuration information is configured using any one or more of the following: a master information block (MIB), a system information block (SIB), and dedicated radio resource control (RRC) signaling.

[0024] In one embodiment, the extraction unit is configured to determine the candidate frequency position according to a grid of a specific size and a reference spacing between Petition 870250009687, dated 06 / 02 / 2025, page 11 / 130 6 / 56 subcarriers, where the reference spacing between subcarriers depends on a carrier frequency band.

[0025] In one embodiment, the central carrier frequency is indicated by means of an indicator and a physical resource block offset (PRB).

[0026] In one embodiment, the carrier frequency position is indicated by an indicator, a physical resource block offset (PRB), and a carrier bandwidth.

[0027] In one embodiment, the carrier frequency position is indicated by a physical resource block offset (PRB) and a carrier bandwidth.

[0028] In one embodiment, a frequency position of a given sub-band on a carrier is indicated by an indicator, a physical resource block offset (PRB), and a sub-band length.

[0029] In one embodiment, a frequency position of a given sub-band on a carrier is indicated by a physical resource block offset (PRB), an initial PRB index, and a sub-band length.

[0030] In one embodiment, the PRB is defined based on a standard spacing between subcarriers or a reference spacing between subcarriers.

[0031] In one embodiment, a parameter to indicate a central carrier frequency and / or a parameter to indicate a carrier frequency position is configured using a MIB; a parameter to indicate a frequency position of a sub-band, where a common search space is located, is configured using a SIB; and a parameter to indicate a frequency position of a sub-band, where a user equipment-specific search space (UE) is located, is Petition 870250009687, dated 06 / 02 / 2025, page 12 / 130 7 / 56 configured using dedicated RRC signaling.

[0032] According to another aspect of the present application, a method is provided that is implemented by the user equipment (UE) which includes: receiving a synchronization signal from a candidate frequency position and receiving configuration information; and extracting any one or more of a carrier center frequency, a carrier frequency position and a sub-band frequency position, according to the configuration information. The configuration information is configured using any one or more of the following: a master information block (MIB), a system information block (SIB), and dedicated radio resource control (RRC) signaling.

[0033] In one embodiment, the candidate frequency position is determined according to a grid of a specific size and a reference spacing between subcarriers, wherein the reference spacing between subcarriers depends on a carrier frequency band.

[0034] In one embodiment, the central carrier frequency is indicated by means of an indicator and a physical resource block offset (PRB).

[0035] In one embodiment, the carrier frequency position is indicated by an indicator, a physical resource block offset (PRB), and a carrier bandwidth.

[0036] In one embodiment, the carrier frequency position is indicated by a physical resource block offset (PRB) and a carrier bandwidth.

[0037] In one embodiment, a frequency position of a given sub-band on a carrier is indicated by an indicator, a physical resource block offset (PRB), and a sub-band length. Petition 870250009687, dated 06 / 02 / 2025, page 13 / 130 8 / 56

[0038] In one embodiment, a frequency position of a given sub-band on a carrier is indicated by a physical resource block offset (PRB), an initial PRB index, and a sub-band length.

[0039] In one embodiment, the PRB is defined based on a standard spacing between subcarriers or a reference spacing between subcarriers.

[0040] In one embodiment, a parameter to indicate a central carrier frequency and / or a parameter to indicate a carrier frequency position is configured using a MIB; a parameter to indicate a frequency position of a sub-band, where a common search space is located, is configured using a SIB; and a parameter to indicate a frequency position of a sub-band, where a user equipment-specific search space - UE is located, is configured using dedicated RRC signaling. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The above and other features of the present application will become more evident with the detailed description below together with the attached drawings, in which: Figure 1 is a block diagram of a base station, according to an embodiment of the present application. Figure 2 is a block diagram of a user device according to an embodiment of the present application; Figure 3 is a schematic diagram of a center carrier frequency indication, according to an embodiment of the present application; Figure 4 is a schematic diagram of a carrier frequency position, according to an embodiment of the present application; Petition 870250009687, dated 06 / 02 / 2025, page 14 / 130 9 / 56 Figure 5 is a schematic diagram of a sub-band frequency position, according to an embodiment of the present application; Figure 6 is a schematic diagram of a sub-band frequency position indication, according to an embodiment of the present application; Figure 7 is a flowchart of a method executed by a base station, according to an embodiment of the present application; and Figure 8 is a flowchart of a method executed by a user device, according to an embodiment of the present application. DETAILED DESCRIPTION OF THE MODALITIES

[0042] The following text describes the present invention in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the present invention is not limited to the specific embodiments described below. Furthermore, for the sake of simplicity, a detailed description of known art not directly related to the present invention is omitted to avoid confusion in understanding the present description.

[0043] Some terms included in this application are described below. Except where otherwise specified, the terms included in this application are used as defined in the present invention. In addition, this application is illustrated by considering LTE, eLTE, and NR as examples. It should be noted that this application is not limited to LTE, eLTE, and NR. Instead, this application is also applicable to other wireless communication systems, for example, a 6G wireless communication system.

[0044] Figure 1 is a block diagram of a base station. 100, according to an embodiment of the present invention. As per Petition 870250009687, dated 06 / 02 / 2025, page 15 / 130 10 / 56 shown in Figure 1, a base station 100 comprises a configuration unit 110 and a transmission unit 120. Those skilled in the art should understand that the base station 100 may additionally include other functional units necessary to implement its functions, such as various processors, memories, RF signal processing units, baseband signal processing units, and other downlink physical channel transmission processing units. However, for the sake of simplicity, a detailed description of these well-known elements is omitted here.

[0045] The 110 configuration unit is configured to configure any one or more of the following: a center carrier frequency, a carrier frequency position, and a sub-band frequency position. For example, the 110 configuration unit can perform the configuration using any one or more of the following: a master information block (MIB), a system information block (SIB), and dedicated radio resource control (RRC) signaling.

[0046] In one example, configuration unit 110 can be configured to determine the candidate frequency position, according to a grid of a specific size and a reference spacing between subcarriers, wherein the reference spacing between subcarriers depends on a carrier frequency range. For example, configuration unit 110 can be configured to indicate a center carrier frequency via an indicator and a physical resource block offset (PRB).

[0047] In one example, configuration unit 110 can be configured to indicate a carrier frequency position via an indicator, a physical resource block offset (PRB), and a carrier bandwidth. Alternatively, the Petition 870250009687, dated 06 / 02 / 2025, page 16 / 130 The 11 / 56 configuration unit 110 can also be configured to indicate a carrier frequency position via a physical resource block offset (PRB) and a carrier bandwidth.

[0048] In one example, configuration unit 110 can be configured to indicate a frequency position of a given sub-band on a carrier via an indicator, a physical resource block offset (PRB), and a sub-band length. Alternatively, configuration unit 110 can also be configured to indicate a frequency position of a given sub-band on a carrier via a physical resource block offset (PRB), an initial PRB index, and a sub-band length.

[0049] In one example, configuration unit 110 can be configured to set the PRB based on a standard spacing between subcarriers or a reference spacing between subcarriers.

[0050] In one example, configuration unit 110 can be configured to: configure, using a MIB, a parameter to indicate a central carrier frequency and / or a parameter to indicate a carrier frequency position; configure, using a SIB, a parameter to indicate a frequency position of a sub-band where a common search space is located; and configure, using dedicated RRC signaling, a parameter to indicate a frequency position of a sub-band where a specific UE search space is located.

[0051] Transmission unit 120 is configured to transmit a synchronization signal at a candidate frequency position and to transmit information configured by the configuration unit.

[0052] Figure 2 is a block diagram of a UE, according to Petition 870250009687, dated 06 / 02 / 2025, page 17 / 130 12 / 56 an embodiment of the present application. As shown in Figure 2, the UE 200 comprises a receiving unit 210 and an extraction unit 220. Those skilled in the art should understand that the UE 200 may also include other functional units necessary to implement its functions, such as various processors, memories, RF signal processing units, baseband signal processing units, and other uplink physical channel transmission processing units. However, for the sake of simplification, a detailed description of these well-known elements is omitted here.

[0053] The receiving unit 210 is configured to receive a synchronization signal from a candidate frequency position and to receive configuration information.

[0054] Extraction unit 220 is configured to extract any one or more of a center carrier frequency, a carrier frequency position, and a sub-band frequency position, according to the configuration information. For example, the configuration information is configured using any one or more of the following: a master information block (MIB), a system information block (SIB), and dedicated radio resource control (RRC) signaling.

[0055] In one example, the 220 extraction unit can be configured to determine the candidate frequency position, according to a grid of a specific size and a reference spacing between subcarriers, where the reference spacing between subcarriers depends on a subcarrier frequency range. For example, a center carrier frequency is indicated by an indicator and a physical feature block offset (PRB).

[0056] In one modality, a frequency position of Petition 870250009687, dated 06 / 02 / 2025, page 18 / 130 13 / 56 carrier frequency is indicated by an indicator, a physical resource block offset (PRB), and a carrier bandwidth. Alternatively, a carrier frequency position can be indicated by a physical resource block offset (PRB) and a carrier bandwidth.

[0057] In one example, a frequency position of a given sub-band on a carrier is indicated by an indicator, a physical feature block offset (PRB), and a sub-band length. Alternatively, a frequency position of a given sub-band on a carrier can be indicated by a physical feature block offset (PRB), an initial PRB index, and a sub-band length.

[0058] In one example, the PRB is defined based on a standard spacing between subcarriers or a reference spacing between subcarriers.

[0059] In one example, a parameter to indicate a central carrier frequency and / or a parameter to indicate a carrier frequency position is configured using a MIB; a parameter to indicate a frequency position of a sub-band, where a common search space is located, is configured using a SIB; and a parameter to indicate a frequency position of a sub-band, where a UE-specific search space is located, is configured using dedicated RRC signaling.

[0060] The operations of base station 100 and UE 200 are described below using some specific modes. Mode 1

[0061] This modality refers to a candidate frequency position of the center frequency of a synchronization signal, or to a frequency raster of a synchronization signal. Petition 870250009687, dated 06 / 02 / 2025, page 19 / 130 14 / 56 Operation of base station 100

[0062] In LTE, the center frequency of a synchronization signal and the center frequency of a carrier are in the same position, that is, the two center frequencies are identical. Base station (eNB) 100 transmits a synchronization signal at a given candidate frequency position of the synchronization signal and then notifies the size of a downlink bandwidth of the carrier via a MIB.

[0063] In LTE, there are six channel bandwidths for a carrier: 1.4 MHz, 3 MHz, 5 MHz, 10 MHz, 15 MHz, and 20 MHz, which are represented by 3-bit information in a MIB. In NR, the center frequency of a synchronization signal may be inconsistent with the center frequency of a carrier. Furthermore, the channel bandwidth of a carrier may be greater than 1 GHz, and for flexibility in the carrier channel bandwidth value, it is possible for the channel bandwidth to have any value, rather than being quantified in several specific values ​​as in LTE. Additionally, the size of a carrier channel transmission bandwidth can be represented by the number of physical resource blocks (PRBs). In the frequency domain, a PRB includes 12 subcarriers. In NR, a plurality of sub-bands can be supported on the same carrier, and different sub-bands have different subcarrier spacings.Due to the different subcarrier spacings, PRBs that include 12 subcarriers can have different physical bandwidth sizes. For example, for a subband with a subcarrier spacing of 15 kHz, the physical bandwidth of a PRB that includes 12 subcarriers is 180 kHz; and for a subband with a subcarrier spacing of 60 kHz, the physical bandwidth of a PRB that includes 12 subcarriers is 720 kHz. Therefore, for... Petition 870250009687, dated 06 / 02 / 2025, page 20 / 130 15 / 56 carriers or sub-bands with the same channel bandwidth, if the bandwidth of a carrier or sub-band is represented by the number of PRBs, the number of PRBs included in it will be different with respect to different subcarrier spacing sizes. For example, for a carrier with a given bandwidth, when a subcarrier spacing of 15 kHz is used to calculate the number of PRBs included in the carrier bandwidth, and the calculated number of PRBs in the carrier bandwidth is 100, the number of PRBs in that carrier bandwidth will be 25 when a subcarrier spacing of 60 kHz is used.

[0064] In the debate about NR in 3GPP, a consensus was reached on the available subcarrier spacing, which is 15*2nkHz, where n is an integer. Thus, the NR subcarrier spacing can be 3.75 kHz, 7.5 kHz, 15 kHz, 30 kHz, 60 kHz, 120 kHz, and so on. If any of the subcarrier spacing values ​​can be used for a synchronization signal, the eNB can use one of a plurality of subcarrier spacings to transmit the synchronization signal at a candidate frequency position for each synchronization signal. In this way, the UE needs to perform blind detection of synchronization signals from a plurality of subcarrier spacings at a candidate frequency position for each synchronization signal, thus increasing the UE complexity and the time required for the synchronization process.Thus, the subcarrier spacing of one or more synchronization signals can be predefined according to different carrier frequency bands. As shown in Table 1 below, only one subcarrier spacing is defined in a given carrier frequency band. Petition 870250009687, dated 06 / 02 / 2025, page 21 / 130 In this 16 / 56 format, the eNB only needs to transmit the synchronization signals with a subcarrier spacing at the candidate frequency position of a given synchronization signal, thus reducing the UE complexity and the synchronization time required by the UE. Carrier frequency range: 0 to 3 GHz, 3 to 6 GHz, 6 to 30 GHz, 30 to 60 GHz, above 60 GHz. Synchronization signal subcarrier spacing: 15 kHz, 30 kHz, 60 kHz, 120 kHz, 240 kHz. Table 1

[0065] When a plurality of subcarrier spacings is predefined in a given frequency range, the eNB may use only one of the plurality of subcarrier spacings to transmit a synchronization signal when transmitting the synchronization signal. The UE then determines the subcarrier spacing of the received synchronization signal by blind detection.

[0066] Alternatively, the subcarrier spacing of a synchronization signal may be a standard subcarrier spacing.

[0067] In LTE, the center frequency of a synchronization signal is at the same frequency position as the center frequency of a carrier, and a candidate frequency position or frequency raster of the center frequency of the synchronization signal is 100 kHz. In LTE, a frequency raster is also known as a channel raster. In NR, the candidate frequency position or frequency raster of a synchronization signal center frequency must be an integral multiple of 100 kHz, and must also be an integral multiple of the physical bandwidth of a PRB. With respect to the subcarrier spacing of a given synchronization signal, the candidate frequency position or frequency raster of the synchronization signal center frequency must be the least common multiple of 100 kHz and Petition 870250009687, dated 06 / 02 / 2025, page 22 / 130 17 / 56 the subcarrier spacing of the synchronization signal is 12*, i.e., the center frequency of the synchronization signal is an integral multiple of the least common multiple of 100 kHz and the subcarrier spacing of the synchronization signal is 12*. For example, when the subcarrier spacing of the synchronization signal is 15 kHz, the candidate frequency position or frequency raster of its center frequency will be 900 kHz, i.e., the center frequency of the synchronization signal is an integral multiple of 900 kHz. The candidate frequency position or frequency raster of the center frequency of a synchronization signal, as shown in Table 2 below, can be obtained for different carrier frequency ranges.Alternatively, the candidate frequency position or frequency raster of the synchronization signal's center frequency should be the least common multiple of 100 kHz and the subcarrier spacing of the synchronization signal; that is, the center frequency of the synchronization signal is an integral multiple of the least common multiple of 100 kHz and the subcarrier spacing of the synchronization signal. For example, when the subcarrier spacing of the synchronization signal is 15 kHz, the candidate frequency position or frequency raster of its center frequency will be 300 kHz; that is, the center frequency of the synchronization signal is an integral multiple of 300 kHz. The candidate frequency position or frequency raster of the center frequency of a synchronization signal, as shown in Table 3 below, can be obtained for different carrier frequency ranges.

[0068] The candidate frequency position of the synchronization signal center frequency refers to a frequency or frequency position at which a synchronization signal can be transmitted, i.e., a frequency or frequency position that can be used to transmit a synchronization signal. The candidate frequency position Petition 870250009687, dated 06 / 02 / 2025, page 23 / 130 18 / 56 is a set of frequencies or frequency positions that can be used to transmit a synchronization signal and that satisfies a certain condition, and the candidate frequency position of a synchronization signal center frequency can also be called a frequency raster or a channel raster of a synchronization signal. Carrier frequency range 0 to 3 GHz 3 to 6 GHz 6 to 30 GHz 30 to 60 GHz Above 60 GHz Synchronization signal subcarrier spacing 15 kHz 30 kHz 60 kHz 120 kHz 240 kHz Synchronization signal frequency raster 900 kHz 1800 kHz 3600 kHz 7200 kHz 14400 kHz Table 2 Carrier frequency range 0 to 3 GHz 3 to 6 GHz 6 to 30 GHz 30 to 60 GHz Above 60 GHz Synchronization signal subcarrier spacing 15 kHz 30 kHz 60 kHz 120 kHz 240 kHz Synchronization signal frequency raster 300 kHz 300 kHz 300 kHz 600 kHz 1200 kHz Table 3

[0069] Alternatively, the candidate frequency position or frequency raster of a synchronization signal center frequency is determined by the frequency range of a carrier or the frequency band of a carrier. As shown in Table 4 below, the frequency raster of a synchronization signal or the candidate frequency position of the center frequency of a synchronization signal can be obtained(a) from the frequency range of a carrier or the frequency band in which a carrier is located. For example, when the carrier frequency is from 3 GHz to 6 GHz, the candidate frequency position or frequency raster of the Petition 870250009687, dated 06 / 02 / 2025, p. 24 / 130 19 / 56 center frequency will be 1800 kHz, that is, the center frequency of the synchronization signal is an integral multiple of 1800 kHz. The candidate frequency position of the synchronization signal center frequency refers to a frequency or frequency position at which a synchronization signal can be transmitted, i.e., a frequency or frequency position that can be used to transmit a synchronization signal. The candidate frequency position is a set of frequencies or frequency positions that can be used to transmit a synchronization signal and that satisfies a certain condition, and the candidate frequency position of a synchronization signal center frequency may also be called a frequency raster or a channel raster of a synchronization signal. Carrier frequency range 0 to 3 GHz 3 to 6 GHz 6 to 30 GHz 30 to 60 GHz Above 60 GHz Synchronization signal frequency raster 900 kHz 1800 kHz 3600 kHz 7200 kHz 14400 kHz Table 4

[0070] Alternatively, the candidate frequency position or frequency raster of a synchronization signal center frequency is determined by the subcarrier spacing of a synchronization signal. As shown in Table 5 below, the frequency raster of a synchronization signal or the candidate frequency position of the center frequency of a synchronization signal can be obtained from the subcarrier spacing of the synchronization signal. For example, when the subcarrier spacing of a synchronization signal is 30 kHz, the candidate frequency position or frequency raster of the center frequency of the synchronization signal is 1800 kHz, that is, the center frequency of the synchronization signal is an integral multiple of 1800 kHz. The candidate frequency position of the center frequency of the synchronization signal Petition 870250009687, dated 06 / 02 / 2025, page 25 / 130 20 / 56 refers to a frequency or frequency position at which a synchronization signal can be transmitted; that is, a frequency or frequency position that can be used to transmit a synchronization signal. A candidate frequency position is a set of frequencies or frequency positions that can be used to transmit a synchronization signal and that satisfies a certain condition, and the candidate frequency position of a central frequency of a synchronization signal may also be called a frequency raster or a channel raster of a synchronization signal. Subcarrier spacing of the synchronization signal: 15 kHz, 30 kHz, 60 kHz, 120 kHz, 240 kHz. Frequency raster of the synchronization signal: 900 kHz, 1800 kHz, 3600 kHz, 7200 kHz, 14400 kHz. Table 5

[0071] Alternatively, the candidate frequency position or frequency raster of a synchronization signal center frequency may be determined by the subcarrier spacing of a synchronization signal or carrier frequency band. The candidate frequency position of the synchronization signal center frequency refers to a frequency or frequency position at which a synchronization signal can be transmitted, i.e., a frequency or frequency position that can be used to transmit a synchronization signal. The candidate frequency position is a set of frequencies or frequency positions that can be used to transmit a synchronization signal and that satisfies a given condition, and the candidate frequency position of a synchronization signal center frequency may also be called a frequency raster or a channel raster of a synchronization signal.

[0072] Alternatively, the candidate frequency position or the Petition 870250009687, dated 06 / 02 / 2025, p. 26 / 130 21 / 56 The frequency raster of a synchronization signal center frequency can be determined by the 100 kHz channel raster of a synchronization signal, by the subcarrier spacing of a synchronization signal, or by the carrier frequency band. The candidate frequency position of the synchronization signal center frequency refers to a frequency or frequency position at which a synchronization signal can be transmitted, i.e., a frequency or frequency position that can be used to transmit a synchronization signal. The candidate frequency position is a set of frequencies or frequency positions that can be used to transmit a synchronization signal and that satisfies a given condition, and the candidate frequency position of a synchronization signal center frequency may also be called a frequency raster or a channel raster of a synchronization signal.

[0073] Alternatively, the candidate frequency position or frequency raster of a synchronization signal center frequency may be determined by the 100 kHz channel raster of a synchronization signal and the subcarrier spacing of the synchronization signal. The candidate frequency position of the synchronization signal center frequency refers to a frequency or frequency position at which a synchronization signal can be transmitted, i.e., a frequency or frequency position that can be used to transmit a synchronization signal. The candidate frequency position is a set of frequencies or frequency positions that can be used to transmit a synchronization signal and that satisfies a given condition, and the candidate frequency position of a synchronization signal center frequency may also be called a frequency raster or a channel raster of a synchronization signal. Petition 870250009687, dated 06 / 02 / 2025, p. 27 / 130 22 / 56

[0074] Alternatively, the candidate frequency position or frequency raster of a synchronization signal center frequency can be determined by the 100 kHz channel raster of a synchronization signal and the carrier frequency band. The candidate frequency position of the synchronization signal center frequency refers to a frequency or frequency position at which a synchronization signal can be transmitted, i.e., a frequency or frequency position that can be used to transmit a synchronization signal. The candidate frequency position is a set of frequencies or frequency positions that can be used to transmit a synchronization signal and that satisfies a given condition, and the candidate frequency position of a synchronization signal center frequency may also be called a frequency raster or a channel raster of a synchronization signal. EU Operation 200

[0075] In LTE, the center frequency of a synchronization signal and the center frequency of a carrier are in the same position, that is, the two center frequencies are identical. User equipment (UE) 200 can capture the center frequency information of a synchronization signal by detecting the synchronization signal, that is, capturing the center frequency information of the carrier. Then, the downlink bandwidth size of the carrier can be determined by using the MIB.

[0076] In LTE, there are six channel bandwidths for a carrier: 1.4 MHz, 3 MHz, 5 MHz, 10 MHz, 15 MHz, and 20 MHz, which are represented by 3-bit information in a MIB. In NR, the center frequency of a synchronization signal may be inconsistent with the center frequency of a carrier. That is, the center frequency of the carrier cannot be determined according to the Petition 870250009687, dated 06 / 02 / 2025, p. 28 / 130 23 / 56 center frequency of the synchronization signal captured by synchronization signal detection. Furthermore, the channel bandwidth of a carrier can be greater than 1 GHz, and for flexibility in the carrier channel bandwidth value, it is possible for the channel bandwidth to have any value, rather than being quantified at various specific values ​​as in LTE. Additionally, the size of a carrier channel's transmission bandwidth can be represented by the number of physical resource blocks (PRBs). In the frequency domain, a PRB includes 12 subcarriers. In NR, a plurality of sub-bands can be supported on the same carrier, and different sub-bands have different subcarrier spacings. Due to the different subcarrier spacings, PRBs that also include 12 subcarriers can have different physical bandwidth sizes.For example, for a sub-band with a subcarrier spacing of 15 kHz, the physical bandwidth of a PRB that includes 12 subcarriers is 180 kHz; and for a sub-band with a subcarrier spacing of 60 kHz, the physical bandwidth of a PRB that includes 12 subcarriers is 720 kHz. Therefore, for carriers or sub-bands with the same channel bandwidth, if the bandwidth of a carrier or sub-band is represented by the number of PRBs, the number of PRBs included in it will be different with respect to different subcarrier spacing sizes. For example, for a carrier with a given bandwidth, when a subcarrier spacing of 15 kHz is used to calculate the number of PRBs included in the carrier bandwidth, and the calculated number of PRBs in the carrier bandwidth is 100, the number of PRBs in that carrier bandwidth will be 25 when a subcarrier spacing of 60 kHz is used.

[0077] In the debate on NR in 3GPP, a consensus was reached. Petition 870250009687, dated 06 / 02 / 2025, page 29 / 130 24 / 56 regarding the available subcarrier spacing, which is 15*2nkHz, where n is an integer. The NR subcarrier spacing can be 3.75 kHz, 7.5 kHz, 15 kHz, 30 kHz, 60 kHz, 120 kHz, and so on. When any of the subcarrier spacing values ​​can be used for a synchronization signal's subcarrier spacing, the UE needs to perform blind detection of the synchronization signal from a plurality of subcarrier spacings at the candidate frequency position of each synchronization signal, thus increasing the UE's complexity and the time required for the synchronization process. Therefore, the subcarrier spacings of one or more synchronization signals can be predefined according to different carrier frequency ranges. As shown in Table 1 above, only one subcarrier spacing is defined in a given carrier frequency range.In this way, the UE only needs to detect the synchronization signal of a subcarrier spacing at the candidate frequency position of a given synchronization signal, thus reducing the complexity of the UE and the synchronization time required by the UE.

[0078] When a plurality of subcarrier spacings is predefined in a given frequency range, the eNB may use only one of the plurality of subcarrier spacings to transmit a synchronization signal when transmitting the synchronization signal. The UE then determines the subcarrier spacing of the received synchronization signal by blind detection.

[0079] Alternatively, the subcarrier spacing of a synchronization signal may be a standard subcarrier spacing.

[0080] In LTE, the center frequency of a synchronization signal Petition 870250009687, dated 06 / 02 / 2025, page 30 / 130 25 / 56 is in the same frequency position as the center frequency of a carrier, and a candidate frequency position or frequency raster of the center frequency of the synchronization signal is 100 kHz. In LTE, a frequency raster is also known as a channel raster. In NR, the candidate frequency position or frequency raster of a synchronization signal center frequency must be an integral multiple of 100 kHz, and must also be an integral multiple of the physical bandwidth of a PRB. Regarding the subcarrier spacing of a given synchronization signal, the candidate frequency position or frequency raster of the synchronization signal center frequency must be the least common multiple of 100 kHz and the subcarrier spacing of the synchronization signal must be 12*.For example, when the subcarrier spacing of the synchronization signal is 15 kHz, the candidate frequency position or frequency raster of its center frequency will be 900 kHz, that is, the center frequency of the synchronization signal is an integral multiple of 900 kHz. The candidate frequency position or frequency raster of the center frequency of a synchronization signal, as shown in Table 2 above, can be obtained for different carrier frequency ranges. Alternatively, the candidate frequency position or frequency raster of the center frequency of the synchronization signal should be the least common multiple of 100 kHz and the subcarrier spacing of the synchronization signal, that is, the center frequency of the synchronization signal is an integral multiple of the least common multiple of 100 kHz and the subcarrier spacing of the synchronization signal.For example, when the subcarrier spacing of the synchronization signal is 15 kHz, the candidate frequency position or frequency raster of its center frequency will be 300 kHz; that is, the center frequency of the synchronization signal is an integral multiple of 300 kHz. The position of... Petition 870250009687, dated 06 / 02 / 2025, page 31 / 130 26 / 56 candidate frequency or the frequency raster of the center frequency of a synchronization signal, as shown in Table 3 above, can be obtained for different carrier frequency ranges.

[0081] The candidate frequency position of the synchronization signal center frequency refers to a frequency or frequency position at which a synchronization signal can be transmitted, i.e., a frequency or frequency position that can be used to transmit a synchronization signal. The candidate frequency position is a set of frequencies or frequency positions that can be used to transmit a synchronization signal and that satisfies a certain condition, and the candidate frequency position of a synchronization signal center frequency may also be called a frequency raster or a channel raster of a synchronization signal.

[0082] Alternatively, the candidate frequency position or frequency raster of a synchronization signal center frequency is determined by the frequency range of a carrier or the frequency band of a carrier. As shown in Table 4 above, the frequency raster of a synchronization signal or the candidate frequency position of the center frequency of a synchronization signal can be obtained(a) from the frequency range of a carrier or the frequency band in which a carrier is located. For example, when the carrier frequency is from 3 GHz to 6 GHz, the candidate frequency position or frequency raster of the center frequency will be 1800 kHz, that is, the center frequency of the synchronization signal is an integral multiple of 1800 kHz.The candidate frequency position of the synchronization signal center frequency refers to a frequency or frequency position at which a synchronization signal can be transmitted, i.e., a frequency or frequency position that can be used to transmit a signal. Petition 870250009687, dated 06 / 02 / 2025, page 32 / 130 27 / 56 synchronization. A candidate frequency position is a set of frequencies or frequency positions that can be used to transmit a synchronization signal and that satisfies a certain condition, and the candidate frequency position of a synchronization signal center frequency may also be called a frequency raster or a channel raster of a synchronization signal.

[0083] Alternatively, the candidate frequency position or frequency raster of a synchronization signal center frequency is determined by the subcarrier spacing of a synchronization signal. As shown in Table 5 above, the frequency raster of a synchronization signal or the candidate frequency position of the center frequency of a synchronization signal can be obtained from the subcarrier spacing of the synchronization signal. For example, when the subcarrier spacing of a synchronization signal is 30 kHz, the candidate frequency position or frequency raster of the center frequency of the synchronization signal is 1800 kHz, that is, the center frequency of the synchronization signal is an integral multiple of 1800 kHz.The candidate frequency position of the synchronization signal center frequency refers to a frequency or frequency position at which a synchronization signal can be transmitted; that is, a frequency or frequency position that can be used to transmit a synchronization signal. The candidate frequency position is a set of frequencies or frequency positions that can be used to transmit a synchronization signal and that satisfies a certain condition, and the candidate frequency position of a synchronization signal center frequency may also be called a frequency raster or a channel raster of a synchronization signal.

[0084] Alternatively, the candidate frequency position or the Petition 870250009687, dated 06 / 02 / 2025, page 33 / 130 28 / 56 The frequency raster of a synchronization signal center frequency can be determined by the subcarrier spacing of a synchronization signal or the carrier frequency band. The candidate frequency position of the synchronization signal center frequency refers to a frequency or frequency position at which a synchronization signal can be transmitted, i.e., a frequency or frequency position that can be used to transmit a synchronization signal. The candidate frequency position is a set of frequencies or frequency positions that can be used to transmit a synchronization signal and that satisfies a given condition, and the candidate frequency position of a synchronization signal center frequency may also be called a frequency raster or a channel raster of a synchronization signal.

[0085] Alternatively, the candidate frequency position or frequency raster of a synchronization signal center frequency may be determined by the 100 kHz channel raster of a synchronization signal, by the subcarrier spacing of a synchronization signal, or by the carrier frequency band. The candidate frequency position of the synchronization signal center frequency refers to a frequency or frequency position at which a synchronization signal can be transmitted, i.e., a frequency or frequency position that can be used to transmit a synchronization signal.A candidate frequency position is a set of frequencies or frequency positions that can be used to transmit a synchronization signal and that satisfies a certain condition, and the candidate frequency position of a synchronization signal center frequency may also be called a frequency raster or a channel raster of a synchronization signal. Petition 870250009687, dated 06 / 02 / 2025, page 34 / 130 29 / 56

[0086] Alternatively, the candidate frequency position or frequency raster of a synchronization signal center frequency can be determined by the 100 kHz channel raster of a synchronization signal and the subcarrier spacing of the synchronization signal. The candidate frequency position of the synchronization signal center frequency refers to a frequency or frequency position at which a synchronization signal can be transmitted, i.e., a frequency or frequency position that can be used to transmit a synchronization signal. The candidate frequency position is a set of frequencies or frequency positions that can be used to transmit a synchronization signal and that satisfies a given condition, and the candidate frequency position of a synchronization signal center frequency may also be called a frequency raster or a channel raster of a synchronization signal.

[0087] Alternatively, the candidate frequency position or frequency raster of a synchronization signal center frequency can be determined by the 100 kHz channel raster of a synchronization signal and the carrier frequency band. The candidate frequency position of the synchronization signal center frequency refers to a frequency or frequency position at which a synchronization signal can be transmitted, i.e., a frequency or frequency position that can be used to transmit a synchronization signal. The candidate frequency position is a set of frequencies or frequency positions that can be used to transmit a synchronization signal and that satisfies a given condition, and the candidate frequency position of a synchronization signal center frequency may also be called a frequency raster or a channel raster of a synchronization signal. Petition 870250009687, dated 06 / 02 / 2025, page 35 / 130 30 / 56

[0088] The subcarrier spacing of a synchronization signal or other predefined subcarrier spacing in this mode is a given standard subcarrier spacing.

[0089] The method for determining the candidate frequency position of a synchronization signal center frequency or the frequency raster of a synchronization signal in this embodiment can also be used to determine the center frequency of a carrier or the channel raster or the frequency raster of a carrier.

[0090] Alternatively, the spacing between candidate frequency positions of a carrier center frequency may be greater than or less than or equal to the spacing between candidate frequency positions of a synchronization signal center frequency, and one must be an integral multiple of the other. Alternatively, the frequency raster or channel raster of a carrier may be greater than or less than or equal to the frequency raster or channel raster of a synchronization signal center frequency, and one must be an integral multiple of the other. Mode 2

[0091] This modality refers to a central carrier frequency and a carrier frequency position. Operation of base station 100

[0092] In LTE, the center frequency of a synchronization signal and the center frequency of a carrier are in the same position, that is, the two center frequencies are identical. Base station (eNB) 100 transmits a synchronization signal at a given candidate frequency position of the synchronization signal and then notifies the size of a downlink bandwidth of the carrier via a MIB.

[0093] In LTE, there are six channel bandwidths for a Petition 870250009687, dated 06 / 02 / 2025, p. 36 / 130 31 / 56 carrier: 1.4 MHz, 3 MHz, 5 MHz, 10 MHz, 15 MHz, and 20 MHz, which are represented by 3-bit information in a MIB. In NR, the center frequency of a synchronization signal may be inconsistent with the center frequency of a carrier. That is, the center frequency of the carrier cannot be determined according to the center frequency of the synchronization signal captured by synchronization signal detection. Furthermore, the channel bandwidth of a carrier may be greater than 1 GHz, and for the flexibility of the carrier channel bandwidth value, it is possible for the channel bandwidth to have any value, rather than being quantified in several specific values ​​as occurs in LTE. Additionally, the size of a carrier channel's transmission bandwidth can be represented by the number of physical resource blocks (PRBs). In the frequency domain, a PRB includes 12 subcarriers.In NR, a plurality of sub-bands can be supported on the same carrier, and different sub-bands have different subcarrier spacings. Due to the different subcarrier spacings, PRBs that equally include 12 subcarriers can have different physical bandwidth sizes. For example, for a sub-band with a subcarrier spacing of 15 kHz, the physical bandwidth of a PRB that includes 12 subcarriers is 180 kHz; and for a sub-band with a subcarrier spacing of 60 kHz, the physical bandwidth of a PRB that includes 12 subcarriers is 720 kHz. Therefore, for carriers or sub-bands with the same channel bandwidth, if the bandwidth of a carrier or sub-band is represented by the number of PRBs, the numbers of PRBs included in it will be different with respect to different subcarrier spacing sizes.For example, for a carrier with a given bandwidth, when a subcarrier spacing of 15 kHz is used to calculate the number of PRBs. Petition 870250009687, dated 06 / 02 / 2025, page 37 / 130 32 / 56 included in the carrier bandwidth, and the calculated number of PRBs in the carrier bandwidth is 100, the number of PRBs in that carrier bandwidth will be 25 when a 60 kHz subcarrier spacing is used.

[0094] In NR, base station (eNB) 100 transmits a synchronization signal at a certain candidate frequency position of the synchronization signal, and the center frequency of a carrier can be determined according to the center frequency of a synchronization signal. As shown in Figure 3, with reference to the center frequency of a synchronization signal, a high / low indicator is used to indicate whether the center frequency of a carrier is higher than the center frequency of a synchronization signal or lower than the center frequency of a synchronization signal, and an offset value is used to indicate the magnitude of an offset of a carrier center frequency from a synchronization signal center frequency. The unit of measurement for the offset can be a PRB or a given reference spacing between subcarriers.The reference spacing between subcarriers can be the subcarrier spacing of a synchronization signal or other predefined subcarrier spacings or a given standard subcarrier spacing. The PRB spacing between subcarriers can be a subcarrier spacing of a synchronization signal or other predefined subcarrier spacings or a given standard subcarrier spacing. Alternatively, the offset can be measured as the number of PRBs and the number of subcarriers. For example, the offset of a carrier center frequency from a synchronization signal center frequency is 1205 subcarriers, and in this case, the offset can also be represented by 100 PRBs + 5. Petition 870250009687, dated 06 / 02 / 2025, page 38 / 130 33 / 56 subcarriers. That is, the integral part obtained from the offset modulus 12 is the number of PRBs, and the remainder is the number of subcarriers. Alternatively, the offset can be a given bandwidth frequency value, for example, the offset is 0.025 MHz or other values. Alternatively, the offset can be an integral multiple of a given bandwidth frequency value, for example, the fundamental bandwidth has a frequency value of 0.025 MHz or other values, and the integral multiple value can be -5, -4, -3, -2, -1.0, 1.2, 3, 4, 5, and other values. The eNB can configure the integral value through physical layer signaling or a Master Information Block (MIB) or a System Information Block (SIB) or a Radio Resource Control (RRC). The offset value is obtained by multiplying the integral value by the fundamental bandwidth frequency value.

[0095] For example, the frequency position of a carrier can be indicated by the two modes described below: Mode 1:.

[0096] Base station (eNB) 100 transmits a synchronization signal at a given candidate frequency position of the synchronization signal. The center frequency of a carrier is determined based on the center frequency of a synchronization signal. As shown in Figure 3, with reference to the center frequency of a synchronization signal, a high / low indicator is used to indicate whether the center frequency of a carrier is higher than the center frequency of a synchronization signal or lower than the center frequency of a synchronization signal, and an offset value is used to indicate the magnitude of an offset of a carrier center frequency from a synchronization signal center frequency. The unit of measurement for the offset can be a PRB or a given reference spacing between subcarriers. The spacing of Petition 870250009687, dated 06 / 02 / 2025, page 39 / 130 34 / 56 The reference between subcarriers can be the subcarrier spacing of a synchronization signal or other predefined subcarrier spacings or a specific standard subcarrier spacing. The PRB spacing between subcarriers can be a subcarrier spacing of a synchronization signal or other predefined subcarrier spacings or a specific standard subcarrier spacing. Alternatively, the offset can be measured as the number of PRBs and the number of subcarriers. For example, the offset of a carrier center frequency from a synchronization signal center frequency is 1205 subcarriers, and in this case, the offset can also be represented by 100 PRBs + 5 subcarriers. That is, the integral part obtained from the modulo offset 12 is the number of PRBs, and the remainder is the number of subcarriers.Alternatively, the offset can be a given bandwidth frequency value, for example, the offset is 0.025 MHz or other values. Alternatively, the offset can be an integral multiple of a given bandwidth frequency value, for example, the fundamental bandwidth has a frequency value of 0.025 MHz or other values, and the integral multiple value can be -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, and other values. The eNB can configure the integral value through physical layer signaling or a Master Information Block (MIB) or a System Information Block (SIB) or a Radio Resource Control (RRC). The offset value is obtained by multiplying the integral value by the fundamental bandwidth frequency value.

[0097] After indicating the center frequency of the carrier, base station (eNB) 100 notifies the full carrier frequency position through channel bandwidth configuration information or carrier transmission bandwidth. Mode 2: Petition 870250009687, dated 06 / 02 / 2025, page 40 / 130 35 / 56

[0098] Base station (eNB) 100 transmits a synchronization signal at a given candidate frequency position of the synchronization signal. Notification of a frequency position of a complete carrier requires only notification of the offset of the lowest or highest carrier frequency from the center frequency of a synchronization channel and the channel bandwidth size or carrier transmission bandwidth, without requiring notification of the carrier center frequency, as shown in Figure 4. The unit of measurement for the offset can be a PRB or a given reference spacing between subcarriers. The reference spacing between subcarriers can be the subcarrier spacing of a synchronization signal or other predefined subcarrier spacings or a given standard subcarrier spacing.The PRB spacing between subcarriers can be a subcarrier spacing of a synchronization signal or other predefined subcarrier spacings or a specific standard subcarrier spacing. Alternatively, the offset can be measured as the number of PRBs and the number of subcarriers. For example, the offset of a carrier center frequency from a synchronization signal center frequency is 1205 subcarriers, and in this case, the offset can also be represented by 100 PRBs + 5 subcarriers. That is, the integral part obtained from the modulo offset 12 is the number of PRBs, and the remainder is the number of subcarriers. Alternatively, the offset can be a specific bandwidth frequency value, for example, the offset is 0.025 MHz or other values.Alternatively, the offset can be an integral multiple of a given bandwidth frequency value, for example, the fundamental bandwidth has a frequency value of 0.025 MHz. Petition 870250009687, dated 06 / 02 / 2025, page 41 / 130 36 / 56 or other values, and the integral multiple value can be -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, and other values. The eNB can configure the integral value through physical layer signaling or a Master Information Block (MIB) or a System Information Block (SIB) or a Radio Resource Control (RRC). The offset value is obtained by multiplying the integral value by the fundamental bandwidth frequency value. EU Operation 200

[0099] In LTE, the center frequency of a synchronization signal and the center frequency of a carrier are in the same position, i.e., the two center frequencies are identical. User equipment (UE) can capture the center frequency information of a synchronization signal by detecting the synchronization signal, i.e., capturing the center frequency information of the carrier. Then, the downlink bandwidth size of the carrier can be determined by using the MIB.

[0100] In LTE, there are six channel bandwidths for a carrier: 1.4 MHz, 3 MHz, 5 MHz, 10 MHz, 15 MHz, and 20 MHz, which are represented by 3-bit information in a MIB. In NR, the center frequency of a synchronization signal may be inconsistent with the center frequency of a carrier. That is, the center frequency of the carrier cannot be determined according to the center frequency of the synchronization signal captured by synchronization signal detection. Furthermore, the channel bandwidth of a carrier can be greater than 1 GHz, and for the flexibility of the carrier channel bandwidth value, it is possible for the channel bandwidth to have any value, rather than being quantified in several specific values ​​as occurs in LTE. Additionally, the size of a carrier channel transmission bandwidth can be represented by the number of physical resource blocks (PRBs). In the frequency domain, a PRB includes 12 subcarriers.In NR, a plurality of. Petition 870250009687, dated 06 / 02 / 2025, p. 42 / 130 37 / 56 sub-bands can be supported on the same carrier, and different sub-bands have different subcarrier spacings. Due to the different subcarrier spacings, PRBs that also include 12 subcarriers can have different physical bandwidth sizes. For example, for a sub-band with a subcarrier spacing of 15 kHz, the physical bandwidth of a PRB that includes 12 subcarriers is 180 kHz; and for a sub-band with a subcarrier spacing of 60 kHz, the physical bandwidth of a PRB that includes 12 subcarriers is 720 kHz. Therefore, for carriers or sub-bands with the same channel bandwidth, if the bandwidth of a carrier or sub-band is represented by the number of PRBs, the numbers of PRBs included in it will be different with respect to different subcarrier spacing sizes.For example, for a carrier with a given bandwidth, when a subcarrier spacing of 15 kHz is used to calculate the number of PRBs included in the carrier bandwidth, and the calculated number of PRBs in the carrier bandwidth is 100, the number of PRBs in that carrier bandwidth will be 25 when a subcarrier spacing of 60 kHz is used.

[0101] In NR, the UE 200 can capture the center frequency of a synchronization signal by detecting the synchronization signal, and the center frequency of a carrier does not need to be an integral multiple of 100 kHz as in LTE, i.e., it is not necessary to define the carrier channel scale. It is only necessary to base the determination of the center frequency of a carrier on the center frequency of a synchronization signal. As shown in Figure 3, with reference to the center frequency of a synchronization signal, a high / low indicator is used to indicate whether the center frequency of a carrier is higher than the center frequency of a synchronization signal or lower than the center frequency of a synchronization signal. Petition 870250009687, dated 06 / 02 / 2025, page 43 / 130 38 / 56 synchronization, and an offset value is used to indicate the magnitude of an offset of a carrier center frequency from a synchronization signal center frequency. The unit of measurement for the offset can be a PRB or a given reference spacing between subcarriers. The reference spacing between subcarriers can be the subcarrier spacing of a synchronization signal or other predefined subcarrier spacings or a given standard subcarrier spacing. The PRB spacing between subcarriers can be a subcarrier spacing of a synchronization signal or other predefined subcarrier spacings or a given standard subcarrier spacing. Alternatively, the offset can be measured as the number of PRBs and the number of subcarriers.For example, the offset of a carrier center frequency from a synchronization signal center frequency is 1205 subcarriers, and in this case, the offset can also be represented by 100 PRBs + 5 subcarriers. That is, the integral part obtained from the modulo offset 12 is the number of PRBs, and the remainder is the number of subcarriers. Alternatively, the offset can be a given bandwidth frequency value, for example, the offset is 0.025 MHz or other values. Alternatively, the offset can be an integral multiple of a given bandwidth frequency value, for example, the fundamental bandwidth has a frequency value of 0.025 MHz or other values, and the integral multiple value can be -5, -4, -3, -2, -1.0, 1.2, 3, 4, 5, and other values.The eNB can configure the integral value through physical layer signaling or a Master Information Block (MIB) or a System Information Block (SIB) or a Radio Resource Control (RRC). The offset value is obtained by multiplying the... Petition 870250009687, dated 06 / 02 / 2025, page 44 / 130 39 / 56 integral value by the fundamental bandwidth frequency value. For example, the frequency position of a carrier can be captured by the two methods described below: Mode 1:

[0102] The UE 200 can capture the center frequency of a synchronization signal by detecting the synchronization signal, and the center frequency of a carrier does not need to be an integral multiple of 100 kHz as is the case in LTE, i.e., it is not necessary to define the carrier channel raster. It is only necessary to base the determination of the center frequency of a carrier on the center frequency of a synchronization signal. As shown in Figure 3, with reference to the center frequency of a synchronization signal, a high / low indicator is used to indicate whether the center frequency of a carrier is higher than the center frequency of a synchronization signal or lower than the center frequency of a synchronization signal, and an offset value is used to indicate the magnitude of an offset of a carrier center frequency from a synchronization signal center frequency.The unit of measurement for displacement can be a PRB or a given reference spacing between subcarriers. The reference spacing between subcarriers can be the subcarrier spacing of a synchronization signal or other predefined subcarrier spacings, or a given standard subcarrier spacing. The PRB spacing between subcarriers can be a subcarrier spacing of a synchronization signal or other predefined subcarrier spacings, or a given standard subcarrier spacing. Alternatively, displacement can be measured as the number of PRBs and the number of subcarriers. For example, the displacement of a carrier center frequency from a... Petition 870250009687, dated 06 / 02 / 2025, page 45 / 130 The 40 / 56 central frequency of the synchronization signal has 1205 subcarriers, and in this case, the offset can also be represented by 100 PRBs + 5 subcarriers. That is, the integral part obtained from the modulo offset 12 is the number of PRBs, and the remainder is the number of subcarriers. Alternatively, the offset can be a given bandwidth frequency value, for example, the offset is 0.025 MHz or other values. Alternatively, the offset can be an integral multiple of a given bandwidth frequency value, for example, the fundamental bandwidth has a frequency value of 0.025 MHz or other values, and the integral multiple value can be -5, -4, -3, -2, -1.0, 1.2, 3, 4, 5, and other values. The eNB can configure the integral value through physical layer signaling or a Master Information Block (MIB) or a System Information Block (SIB) or a Radio Resource Control (RRC).The offset value is obtained by multiplying the integral value by the fundamental bandwidth frequency value.

[0103] After capturing the center frequency of a carrier, the UE. 200 can determine the frequency position of the complete carrier according to the configuration information of a channel bandwidth or a carrier transmission bandwidth. Mode 2:

[0104] The UE 200 can capture the center frequency of a synchronization signal by detecting the synchronization signal, and the center frequency of a carrier does not need to be an integral multiple of 100 kHz as is the case in LTE, i.e., it is not necessary to define the carrier channel raster. Furthermore, the UE 200 can determine the frequency position of a complete carrier by knowing only the offset of the lowest or highest frequency of the carrier from the center frequency of a synchronization channel and the channel bandwidth size or bandwidth of Petition 870250009687, dated 06 / 02 / 2025, page 46 / 130 41 / 56 carrier transmission, without needing to know the carrier center frequency, as shown in Figure 4. The unit of measurement for the offset can be a PRB or a given reference spacing between subcarriers. The reference spacing between subcarriers can be the subcarrier spacing of a synchronization signal or other predefined subcarrier spacings or a given standard subcarrier spacing. The PRB spacing between subcarriers can be a subcarrier spacing of a synchronization signal or other predefined subcarrier spacings or a given standard subcarrier spacing. Alternatively, the offset can be measured as the number of PRBs and the number of subcarriers.For example, the offset of a carrier center frequency from a synchronization signal center frequency is 1205 subcarriers, and in this case, the offset can also be represented by 100 PRBs + 5 subcarriers. That is, the integral part obtained from the modulo offset 12 is the number of PRBs, and the remainder is the number of subcarriers. Alternatively, the offset can be a given bandwidth frequency value, for example, the offset is 0.025 MHz or other values. Alternatively, the offset can be an integral multiple of a given bandwidth frequency value, for example, the fundamental bandwidth has a frequency value of 0.025 MHz or other values, and the integral multiple value can be -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, and other values.The eNB can configure the integral value through physical layer signaling or a Master Information Block (MIB) or a System Information Block (SIB) or a Radio Resource Control (RRC). The offset value is obtained by multiplying the integral value by the fundamental bandwidth frequency value. Mode 3. Petition 870250009687, dated 06 / 02 / 2025, page 47 / 130 42 / 56

[0105] This modality refers to the frequency position of a sub-band. Operation of base station 100

[0106] The frequency position of a sub-band can be indicated by the following three methods: Mode 1:

[0107] The eNB 100 indicates the frequency position of the full carrier, which can be realized in the manner described in Mode 2 or in other modes. Then, the frequency position of a sub-band can be indicated by an initial PRB index and by the sub-band length. The initial PRB index number is one of the PRB index numbers in the full carrier. The sub-band length can be the number of PRBs continuously distributed across a subcarrier or the number of subcarriers. The subcarrier spacing can be the subcarrier spacing of a synchronization signal or other predefined subcarrier spacings or a given standard subcarrier spacing. The PRB spacing between subcarriers can be a subcarrier spacing of a synchronization signal or other predefined subcarrier spacings or a given standard subcarrier spacing. Mode 2:

[0108] The eNB 100, with reference to the center frequency of a synchronization signal, uses a high / low indicator to show whether the lowest or highest frequency of a sub-band is higher than or lower than the center frequency of a synchronization signal; uses an offset value to indicate the magnitude of an offset of the lowest or highest frequency of the sub-band from a given synchronization signal frequency; and indicates the bandwidth of the sub-band, without Petition 870250009687, dated 06 / 02 / 2025, p. 48 / 130 43 / 56 it is necessary to indicate the frequency position of the complete carrier. In this way, the eNB 100 can indicate the frequency position of the complete subband, as shown in Figure 5. The unit of measurement for the offset can be a PRB or a given reference spacing between subcarriers. The reference spacing between subcarriers can be the spacing between subcarriers of a synchronization signal or other predefined spacings between subcarriers or a given standard spacing between subcarriers. The PRB spacing between subcarriers can be a spacing between subcarriers of a synchronization signal or other predefined spacings between subcarriers or a given standard spacing between subcarriers. Alternatively, the offset can be measured as the number of PRBs and the number of subcarriers.For example, the offset of a carrier center frequency from a synchronization signal center frequency is 1205 subcarriers, and in this case, the offset can also be represented by 100 PRBs + 5 subcarriers. That is, the integral part obtained from the modulo offset 12 is the number of PRBs, and the remainder is the number of subcarriers. Alternatively, the offset can be a given bandwidth frequency value, for example, the offset is 0.025 MHz or other values. Alternatively, the offset can be an integral multiple of a given bandwidth frequency value, for example, the fundamental bandwidth has a frequency value of 0.025 MHz or other values, and the integral multiple value can be -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, and other values.The eNB can configure the integral value through physical layer signaling or a Master Information Block (MIB) or a System Information Block (SIB) or a Radio Resource Control (RRC). The offset value is obtained by multiplying the integral value by the fundamental bandwidth frequency value. Petition 870250009687, dated 06 / 02 / 2025, page 49 / 130 44 / 56 Mode 3:

[0109] The eNB 100, with reference to the center frequency of a synchronization signal, uses an offset value to indicate the magnitude of an offset of the lowest or highest frequency of a carrier from a synchronization signal center frequency; it uses an initial PRB index number of a sub-band; and it indicates the bandwidth of the sub-band, without needing to indicate the frequency position of the complete carrier. In this way, the eNB 100 can indicate the frequency position of the complete sub-band, as shown in Figure 6. The unit of measurement for the offset can be a PRB or a given reference spacing between subcarriers. The reference spacing between subcarriers can be the spacing between subcarriers of a synchronization signal or other predefined spacings between subcarriers or a given standard spacing between subcarriers.The subcarrier spacing of the offset PRB and the initial PRB can be the subcarrier spacing of a synchronization signal or other predefined subcarrier spacings or a given standard subcarrier spacing. Alternatively, the offset can be measured as the number of PRBs and the number of subcarriers. For example, the offset of a carrier center frequency from a synchronization signal center frequency is 1205 subcarriers, and in this case, the offset can also be represented by 100 PRBs + 5 subcarriers. That is, the integral part obtained from the offset modulus 12 is the number of PRBs, and the remainder is the number of subcarriers. Alternatively, the offset can be a given bandwidth frequency value, for example, the offset is 0.025 MHz or other values.Alternatively, the offset can be an integral multiple of a given bandwidth frequency value, for example, a. Petition 870250009687, dated 06 / 02 / 2025, page 50 / 130 45 / 56 fundamental bandwidth has a frequency value of 0.025 MHz or other values, and the integral multiple value can be -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, and other values. The eNB can configure the integral value through physical layer signaling or a Master Information Block (MIB) or a System Information Block (SIB) or a Radio Resource Control (RRC). The offset value is obtained by multiplying the integral value by the fundamental bandwidth frequency value. EU Operation 200

[0110] The frequency position of a sub-band can be captured by the following three methods: Mode 1:

[0111] UE 200 first captures the frequency position of the full carrier, which can be accomplished in the manner described in Mode 2 or in other ways. Then, the frequency position of a sub-band can be known by capturing an initial PRB index number and the sub-band length. The initial PRB index number is one of the PRB index numbers on the full carrier. The sub-band length can be the number of PRBs continuously distributed across a subcarrier or the number of subcarriers. The subcarrier spacing can be the subcarrier spacing of a synchronization signal or other predefined subcarrier spacings or a given standard subcarrier spacing. The PRB spacing between subcarriers can be a subcarrier spacing of a synchronization signal or other predefined subcarrier spacings or a given standard subcarrier spacing. Mode 2:

[0112] The UE 200 does not need to determine the frequency position of the complete carrier. The UE 200 can determine the center frequency of a synchronization signal by detecting the synchronization signal. Petition 870250009687, dated 06 / 02 / 2025, page 51 / 130 46 / 56 Based on the received high / low indicator, it can be determined whether the lowest or highest frequency of a sub-band is higher than or lower than the center frequency of a synchronization signal; the magnitude of the offset of the lowest or highest frequency of the sub-band from a synchronization signal center frequency can be determined according to the received offset value; and the frequency position of the entire sub-band can be determined according to the received sub-band bandwidth, as shown in Figure 5. The unit of measurement for the offset can be a PRB or a given reference spacing between subcarriers. The reference spacing between subcarriers can be the spacing between subcarriers of a synchronization signal or other predefined spacings between subcarriers or a given standard spacing between subcarriers.The PRB spacing between subcarriers can be a subcarrier spacing of a synchronization signal or other predefined subcarrier spacings or a specific standard subcarrier spacing. Alternatively, the offset can be measured as the number of PRBs and the number of subcarriers. For example, the offset of a carrier center frequency from a synchronization signal center frequency is 1205 subcarriers, and in this case, the offset can also be represented by 100 PRBs + 5 subcarriers. That is, the integral part obtained from the modulo offset 12 is the number of PRBs, and the remainder is the number of subcarriers. Alternatively, the offset can be a specific bandwidth frequency value, for example, the offset is 0.025 MHz or other values.Alternatively, the offset can be an integral multiple of a given bandwidth frequency value, for example, a. Petition 870250009687, dated 06 / 02 / 2025, page 52 / 130 47 / 56 fundamental bandwidth has a frequency value of 0.025 MHz or other values, and the integral multiple value can be -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, and other values. The eNB can configure the integral value through physical layer signaling or a Master Information Block (MIB) or a System Information Block (SIB) or a Radio Resource Control (RRC). The offset value is obtained by multiplying the integral value by the fundamental bandwidth frequency value. Mode 3:

[0113] The UE 200 does not need to determine the frequency position of the complete carrier. The UE 200 can determine the center frequency of a synchronization signal by detecting the synchronization signal. The magnitude of the offset of the lowest or highest frequency of a carrier from a center frequency of the synchronization signal can be determined according to the received offset value; the initial PRB position of a subband can be determined according to the received initial PRB index number; and the frequency position of the complete subband can be determined according to the received subband bandwidth, as shown in Figure 6. The unit of measurement for the offset can be a PRB or a given reference spacing between subcarriers.The reference spacing between subcarriers can be the subcarrier spacing of a synchronization signal or other predefined subcarrier spacings, or a specific standard subcarrier spacing. The subcarrier spacing of the offset PRB and the initial PRB can be the subcarrier spacing of a synchronization signal or other predefined subcarrier spacings, or a specific standard subcarrier spacing. Alternatively, the offset can be measured as the number of PRBs and the number of subcarriers. Petition 870250009687, dated 06 / 02 / 2025, page 53 / 130 48 / 56 For example, the offset of a carrier center frequency from a synchronization signal center frequency is 1205 subcarriers, and in this case, the offset can also be represented by 100 PRBs + 5 subcarriers. That is, the integral part obtained from the modulo offset 12 is the number of PRBs, and the remainder is the number of subcarriers. Alternatively, the offset can be a given bandwidth frequency value, for example, the offset is 0.025 MHz or other values. Alternatively, the offset can be an integral multiple of a given bandwidth frequency value, for example, the fundamental bandwidth has a frequency value of 0.025 MHz or other values, and the integral multiple value can be -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, and other values.The eNB can configure the integral value through physical layer signaling or a Master Information Block (MIB) or a System Information Block (SIB) or a Radio Resource Control (RRC). The offset value is obtained by multiplying the integral value by the fundamental bandwidth frequency value.

[0114] Figure 7 is a flowchart of a method executed by a base station, according to an embodiment of the present application. As shown in Figure 7, method 700 begins at step S710.

[0115] At step S720, any one or more of a center carrier frequency, a carrier frequency position, and a sub-band frequency position are configured. The configuration can be performed using any one or more of the following: a master information block (MIB), a system information block (SIB), and dedicated radio resource control (RRC) signaling.

[0116] In step S730, a synchronization signal is transmitted at a candidate frequency position, and the configured information Petition 870250009687, dated 06 / 02 / 2025, page 54 / 130 49 / 56 are transmitted by the configuration unit.

[0117] Preferably, the candidate frequency position can be determined according to a grid of a specific size and a reference spacing between subcarriers, wherein the reference spacing between subcarriers depends on a carrier frequency range.

[0118] Preferably, the central carrier frequency can be indicated by means of an indicator and a physical resource block offset (PRB).

[0119] Preferably, the carrier frequency position can be indicated by means of an indicator, a physical resource block offset (PRB) and a carrier bandwidth. Alternatively, the carrier frequency position can be indicated by means of a physical resource block offset (PRB) and a carrier bandwidth.

[0120] Preferably, the frequency position of a given sub-band on a carrier can be indicated by an indicator, a physical feature block offset (PRB), and a sub-band length. Alternatively, the frequency position of a given sub-band on a carrier can be indicated by a physical feature block offset (PRB), an initial PRB index, and a sub-band length.

[0121] Preferably, the PRB is defined based on a standard subcarrier spacing or a reference subcarrier spacing. A parameter to indicate a center carrier frequency and / or a parameter to indicate a carrier frequency position can be configured using a MIB; a parameter to indicate a frequency position of a sub-band, where a common seek space is located, is configured using a SIB; and a parameter to indicate Petition 870250009687, dated 06 / 02 / 2025, page 55 / 130 50 / 56, a frequency position within a sub-band where a specific UE search space is located, can be configured using dedicated RRC signaling.

[0122] Finally, method 700 ends at step S740.

[0123] Figure 8 is a flowchart of a method executed by a user device, according to an embodiment of the present application. As shown in Figure 8, method 800 starts at step S810.

[0124] In step S820, a synchronization signal is received from a candidate frequency position, and configuration information is received.

[0125] In the S830 step, any one or more of a carrier center frequency, a carrier frequency position, and a sub-band frequency position are extracted according to the configuration information. The configuration information can be configured using any one or more of the following: a master information block (MIB), a system information block (SIB), and dedicated radio resource control (RRC) signaling.

[0126] Preferably, the candidate frequency position can be determined according to a grid of a specific size and a reference spacing between subcarriers, wherein the reference spacing between subcarriers depends on a carrier frequency range.

[0127] Preferably, a central carrier frequency can be indicated by means of an indicator and a physical resource block offset (PRB).

[0128] Preferably, a carrier frequency position can be indicated by means of an indicator, a physical resource block offset (PRB) and a carrier bandwidth. Petition 870250009687, dated 06 / 02 / 2025, page 56 / 130 51 / 56 Alternatively, a carrier frequency position can be indicated by a physical resource block offset (PRB) and a carrier bandwidth.

[0129] Preferably, a frequency position of a given sub-band on a carrier can be indicated by an indicator, a physical feature block offset (PRB), and a sub-band length. Alternatively, a frequency position of a given sub-band on a carrier can be indicated by a physical feature block offset (PRB), an initial PRB index, and a sub-band length.

[0130] Preferably, the PRB is defined based on a standard subcarrier spacing or a reference subcarrier spacing. A parameter to indicate a center carrier frequency and / or a parameter to indicate a carrier frequency position can be configured using a MIB; a parameter to indicate a frequency position of a sub-band, where a common search space is located, is configured using a SIB; and a parameter to indicate a frequency position of a sub-band, where a UE-specific search space is located, can be configured using dedicated RRC signaling.

[0131] Finally, method 800 ends at step S840.

[0132] The methods and related devices according to the present application have been described above in conjunction with preferred embodiments. Those skilled in the art should understand that the methods shown above are merely exemplary. The method according to the present application is not limited to the steps or sequences shown above. The network node and user equipment shown in the figures may include more modules; for example, the network node and user equipment may additionally include modules that Petition 870250009687, dated 06 / 02 / 2025, page 57 / 130 52 / 56 may be developed or developed in the future for application to a base station or EU, and the like. Several identifiers shown above are merely examples and are not intended to limit the present application. The present application is not limited to the specific information elements that serve as examples of such identifiers. Those skilled in the art may make various alterations and modifications in accordance with the teachings of the illustrated embodiments.

[0133] It should be understood that the embodiments described above in this application may be implemented through software, hardware, or a combination of software and hardware. For example, various components of the base station and user equipment in the embodiments above may be implemented through multiple devices, and such devices include, but are not limited to: an analog circuit device, a digital circuit device, a digital signal processing circuit (DSP), a programmable processor, an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), and a complex programmable logic device (CPLD), and the like.

[0134] In this application, the term base station refers to a data switching and control center for mobile communications with high transmission power and wide coverage area, including resource allocation programming and data reception and transmission functions. The term user equipment refers to a mobile user terminal, such as a terminal device capable of wireless communication with a base station or micro base station, such as a mobile phone, laptop computer, or similar device.

[0135] Furthermore, the modalities of the present application disclosed herein may be implemented in a program product of Petition 870250009687, dated 06 / 02 / 2025, page 58 / 130 53 / 56 computer. More specifically, the computer program product is a product provided on a computer-readable medium that includes computer program logic encoded therein. When executed on a computing device, the computer program logic provides related operations to implement the technical solutions of the present application described above. The computer program logic enables a processor to perform the operations (methods) described in the embodiments of the present application when the product is executed on at least one processor of a computing system.Such an embodiment of the present application is generally provided as software, code and / or other data structures, which are configured or encoded on a computer-readable medium, such as an optical disc (e.g., a CD-ROM), a floppy disk or a hard disk, or other media, as firmware or microcode in one or more integrated circuits of read-only memory (ROM), random access memory (RAM) or read-only programmable memory (PROM), or transferable software images, shared databases, etc., in one or more modules. Software, firmware or such configuration may be installed on a computing device, such that one or more processors in the computing device execute the technical solutions described in the embodiments of the present application.

[0136] In addition, each functional module or each feature of the base station and terminal device used in each of the above embodiments may be implemented or executed by a circuit, which is generally formed by one or more integrated circuits. The circuits designed to perform the various functions described herein may include general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), or general-purpose integrated circuits, programmable gate arrays. Petition 870250009687, dated 06 / 02 / 2025, page 59 / 130 54 / 56 field-mounted integrated circuits (FPGAs) or other programmable logic devices, distinct gates or transistor logic, or distinct hardware components, or any combination of the above. The general-purpose processor may be a microprocessor, or it may be any existing processor, a controller, a microcontroller, or a state machine. The general-purpose processor mentioned above or each circuit may be configured with a digital circuit or may be configured with a logic circuit. Furthermore, when an advanced technology capable of replacing current integrated circuits emerges due to advances in semiconductor technology, the present application may also utilize integrated circuits obtained using such advanced technology.

[0137] Although the present application has been shown in connection with the preferred embodiments of the present application, those skilled in the art will understand that various modifications, substitutions and alterations may be made to the present application without departing from the character and scope of the present application. Consequently, the present application should not be defined by the embodiments described above, but should be defined by the attached embodiments and their equivalents.

[0138] The program running on the device according to this application may be a program that enables the computer to implement the functions of the embodiments of this application by controlling the central processing unit (CPU). The program or the information processed by the program may be temporarily stored in volatile memory (e.g., random access memory (RAM)), hard disk drive (HDD), non-volatile memory (e.g., flash memory), or other memory systems.

[0139] The program for implementing the functions of the modalities of the present application may be recorded on a readable recording medium. Petition 870250009687, dated 06 / 02 / 2025, page 60 / 130 55 / 56 by computer. The corresponding functions can be obtained by reading programs recorded on the recording media and executing them through the computer system. The so-called computer system can be a computer system integrated into the device, which may include operating systems or hardware (e.g., peripherals). The computer-readable recording media can be a semiconductor-based recording media, an optical recording media, a magnetic recording media, a recording media for dynamically storing programs for a short period, or any other recording media readable by a computer.

[0140] Several functional features or modules of the device used in the above embodiments may be implemented or executed by circuits (e.g., monolithic or multi-chip integrated circuits). The circuits designed to perform the functions described herein may include general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs) or other programmable logic devices, distinct gates or transistor logic, or distinct hardware components, or any combination thereof. The general-purpose processor may be a microprocessor, or it may be any existing processor, a controller, a microcontroller, or a state machine. The circuit may be a digital circuit or an analog circuit.Even if new integrated circuit technologies emerge that replace existing integrated circuits due to advances in semiconductor technology, the present application can still be implemented using these new integrated circuit technologies.

[0141] The embodiments of the present application have been described in detail above with reference to the attached drawings. However, the Petition 870250009687, dated 06 / 02 / 2025, page 61 / 130 56 / 56 specific structures are not limited to the embodiments described above, and this application also includes any design modifications that do not deviate from the main idea of ​​this application. Furthermore, various modifications may be made to this application within the scope of the embodiments, and the embodiments resulting from the appropriate combination of the technical means presented in different embodiments are also included in the technical scope of this application. In addition, components with the same effect described in the embodiments above may be substituted for one another. Petition 870250009687, dated 06 / 02 / 2025, p. 62 / 130

Claims

1 / 3 CLAIMS 1. User equipment (200) characterized in that it comprises: a receiving unit (210) configured to receive a master information block (MIB) indicating an offset representing a number of subcarriers between (a) a first subcarrier corresponding to a lower frequency position of a subcarrier and (b) a second subcarrier corresponding to a center frequency position of a synchronization signal; and a processor configured to determine the number of subcarriers based on the MIB, wherein the processor is further configured to determine a carrier frequency position based on the center frequency position of the synchronization signal and the number of subcarriers.

2. User equipment (200), according to claim 1, characterized in that the processor is further configured to determine a subband within the carrier based on (a) an initial PRB index and (b) a subband length in PRB numbers, wherein the initial PRB index is derived from a reference point in a frequency domain.

3. User equipment (200), according to claim 2, characterized in that the processor is further configured to receive an RRC signal to determine the reference point.

4. Base station (100) characterized in that it comprises: a configuration unit (110) configured to generate a master information block (MIB) indicating an offset representing a number of subcarriers between (a) a first subcarrier corresponding to a lower frequency position of a subcarrier and (b) a second subcarrier corresponding to a center frequency position of a synchronization signal; and a transmission unit (120) configured to transmit the MIB.

5. Base station (100), according to claim 4, characterized in that the transmission unit (120) is further configured to transmit an RRC signal to determine a reference point in a frequency domain, wherein the reference point is used to indicate an initial PRB index, and a sub-band within the carrier is indicated (a) by the initial PRB index and (b) by a length of the sub-band in PRB numbers.

6. Method implemented by a user equipment (200) characterized in that it comprises: receiving a master information block (MIB) indicating an offset representing a number of subcarriers between (a) a first subcarrier corresponding to a lower frequency position of a subcarrier and (b) a second subcarrier corresponding to a center frequency position of a synchronization signal; determining the number of subcarriers based on the MIB; and determining a carrier frequency position based on the center frequency position of the synchronization signal and the number of subcarriers.

7. Method performed by a base station (100) characterized in that it comprises: generating a master information block (MIB) indicating a Petition 870250009687, dated 06 / 02 / 2025, page 64 / 130 3 / 3 offset representing a number of subcarriers between (a) a first subcarrier corresponding to a lower frequency position of a subcarrier and (b) a second subcarrier corresponding to a center frequency position of a synchronization signal; and transmitting the MIB. Petition 870250009687, dated 06 / 02 / 2025, page 65 / 130

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